2016年1月28日星期四

Fiberglass Windows Are Gaining Popularity

Once regarded as a niche product with maybe 2% share of total U.S. window sales, fiberglass products have gained traction during the last few years. The most recent market report jointly released by the American Architectural Manufacturers Association and the Window & Door Manufacturers Association shows fiberglass with a 3.2% share of market, fiberglass chopped strand mat with 2.6% of remodeling/replacement. More contractors are installing them because more homeowners are asking for them.

Two factors have helped push fiberglass windows out of the niche category and toward the mainstream: More manufacturers — including Marvin Windows and Doors, Pella Corp., and Milgard Windows & Doors — offer fiberglass products, and more homeowners know about them.

Companies that offer both vinyl and fiberglass, or all three — wood, vinyl, and fiberglass — windows, see stronger interest in fiberglass. Another selling point: The fact that because the window is, in effect, all glass, it comes without the frame expansion and contraction, which can cause vinyl windows to lose their dimensional integrity. There is never a seal failure on fiberglass windows.

Contractors who install fiberglass say that cost alone makes it unlikely that fiberglass will rival wood and vinyl in market share, but it is becoming a product of demand. If it’s 3.5% now, fiberglass’ market share will be 10% or 12% in the foreseeable future.

Global Fiberglass Market Continue Growth

One India-based market research firm MarketsandMarkets (M&M) made a report with comprehensive examination of the global fiberglass market—where it’s at and where it’s headed. Fiberglass Market by Type (Roving, Yarns), fiberglass chopped strand mat by Application (Composites, Insulations) & by Region—Trends & Forecasts to 2020 defines and segments the fiberglass market with analysis and forecast of the market size. The report projects the global fiberglass market value to reach $15.57 billion by 2020.

This report says the current market is largely dominated by the developed markets. Asia-Pacific and North America collectively held 78.1% of the global market share in 2015. Asia-Pacific is the dominant market globally. The growth is due to the increasing applicability of fiberglass in various industries such as building & construction. The industrial development of the region is driving upwards the demand of various composite materials used in this market sector.

North America is one of the fastest-growing consumers of fiberglass—a trend that is expected to continue in the near future, Asia-Pacific is the biggest market for fiberglass, accounting for a share of about 55% of the total market size. In terms of volume, China is the highest revenue-generating market for fiberglass in Asia-Pacific. And, it appears to be the faster-growing market for fiberglass in that region. 

Meanwhile, Asia-Pacific and North America are at the forefront of the global fiberglass market, with China and Japan the key markets in Asia-Pacific. China consumed more than half of the demand for fiberglass in that region followed by Japan where consumption is growing at a steady rate. Despite some production capacities present in developing countries, such as China and India, these capacities have proven to be more export-oriented than in the favor of promoting domestic growth for fiber glass. China has developed significant market share in the global fiberglass market, however the competition from carbon fiber and rock wool restricts this market growth.

Fiberglass chopped strand mat applications in the car roof

With the improvement of our living level, the car used more and more ordinary in people's lives. Cars have become necessities. Meanwhile automotive industry led its related industries to booming development. Glass fiber chopped strand mat more widely used in the car roof, retaining fender, bumper. The needs and requirements of fiberglass chopped strand mat in car ceiling much higher than other parts.
Used in the car roof chopped strand mat is generally 100g-250g. Currently, Volkswagen, BMW, Mercedes, Hyundai, Ford and other well-known companies are making use of fiberglass mat car roof. Glass fiber main raw material is : quartz sand, alumina and pyrophyllite, limestone, dolomite, boric acid, soda ash, Glauber's salt, fluorite. It has good insulation, heat resistance, corrosion resistance, high mechanical strength. If chopped strand mats used in the car roof, not only has the excellent performance of its own, the price is also relatively cheap and cost savings. Furthermore, FRP products have a social role in energy conservation and environmental protection, so it has been sought after by many companies.
Because of the energy conservation and environmental protection, the glass fiber chopped strand mat applications will be more and more broad. Not only in the field of automobile ships and other transportation, dining table, windows, bridges and other daily life will also be widely disseminated.

2016年1月27日星期三

FIBERGLASS INSULATION

Scientists developed a method to produce glass fiber in commercial quantities 70 years ago, and created fiberglass insulation. This innovation offered home and commercial building owners an effective, practical way to keep their buildings warm in the winter, cool in the summer and make more efficient use of the energy needed to operate their buildings. In the decades that followed, fiberglass insulation gained popularity and has become the insulation of choice for most American homes.

Fiberglass insulation is made from fine glass fibers, bound together to create a blanket, or a mat,fiberglass chopped strand mat then inserted into wall cavities, attics and other spaces to reduce heat flow, maintain a consistent indoor temperature, as well as absorb sound and reduce noise levels for a better indoor environment. These properties also make fiberglass insulation an ideal material for countless other applications such as appliances, vehicles, pipes and ducts. 

The most important job of any insulation system is to minimize the energy needed to maintain a consistent indoor temperature – keeping homes and buildings comfortable throughout the year.  When coupled with good building practices, including a well sealed building envelope, insulation helps reduce energy use for heating and cooling, which can account for up to 50 percent of a home’s utility costs. It’s the time-tested field performance of fiberglass insulation, coupled with recent advances in the sustainability of these products, and topped off with the total installed affordability that has helped fiberglass insulation have such staying power for seven decades. Fiberglass insulation remains a great choice for better performing homes and buildings for today and tomorrow.

Detail analysis for good FRP molding techniques II

The reproduction of mold production: after the main mold release wax, you can turn the system produce mold, fiberglass chopped strand mat production mold reproduction of the following steps:
1) spraying gel coat: As started making production mode, you must use better performance plastic mold clothing, in order to ensure that the final effect of the mold. And require injection to achieve a certain thickness (0.7-0.8mm).
2) mold laminate: after initial solidification tooling gel coat, you can begin the overlay. Overlay process can not be too fast, the general day lay 2-3 layers of fiberglass cloth or glass fiber mat. Overlay to use a certain amount of mold resin. The performance of this resin is superior to ordinary resins. Overlay process workers should be equipped with plastic, namely resin to add accelerators and curing agent, then using glue tool coating, a layer of fiberglass fabric coated with a layer of plastic, at the same time use the flat iron roll rush fabric row go bubble, make glue evenly. After reaching the specified thickness, ply ends. Under normal circumstances the thickness of the die to reach 3-5 times the product thickness. So time plies generally longer sustainable 6-7 days. (If you choose zero shrinkage mold resin can improve the efficiency, one can laminate 10mm)
3) Strengthening the curing mold: Mold can be naturally cured, can also be heat cured, but there are some general best natural cure period. After the natural curing period, to give the mold reinforcement, the mold in the production process Buzhi Yu damage.
4) production of the mold surface treatment: the production mold curing to the required time, you can play down from the main mold, unmolding can be manual workers, the mold can also be played with a high pressure gas. Production of unmolding need to do the same surface treatment, which including sandpaper, polishing, draw process lines, playing stripping products. Lay the product can be used in the production release product. Materials used in this phase are: tooling gel coat, mold resin, ordinary resin; curing agents, accelerators; fiberglass surface mat, glass fiber mat, glass fiber cloth; fine sandpaper, mold cleaning agent, sealing agent, polishing cream, stripping product (stripping wax, semi-permanent release agent, etc.). The tools in addition to mold processing tools, plus capped layer tools: such as rubber roller, plastic brush, iron roll. Mold making is a delicate and lengthy process, usually a front mold production cycle close to a month's time.

Glass Fibre and FRP Development Tendency

Fiberglass glass is one widely used material in septic tanks, roofing, pipes, high performance aircraft, automobiles,fiberglass chopped strand mat external door skins and water tanks. It is also known as glass reinforced plastics, is manufactured by reinforcing the plastic matrix using fine fibers of glass. Fiberglass being light weight, robust material and extremely strong are used extensively for manufacturing a wide range of products. The raw material required to manufacture fiber glass is easily available at low cost, thus, making it favorable than carbon fibers for various applications.
 
Major applications of fiberglass can be found in such as construction, automobiles, infrastructure, consumer goods and other transportation sectors among others. The growing construction and automobile industry are expected to be the key driver for the growth of fiberglass market. The growing demand for light weight and fuel efficient vehicle is expected to boost the demand of these materials in automobile industry. The increasing demand for fiberglass in China is expected to play a crucial role in augmenting the overall growth of the market. Rapid growth in demand for fiber glass in China is mainly due to the growing construction, wing energy sector and electrical goods industry. Asia Pacific is expected to be the leading manufacturer as well as consumer of the fiberglass market over the next few years. 

Now days, global fiberglass market is intensively competitive with the existing major players competing majorly on the basis of quality, scale of operations, technology, price and innovation among others. The overall fiberglass market is highly concentrated owing to the presence of few large players in the market which account for major share in the market due to their huge production capacities. Chinese players are expected to dominate the global manufacturing of fiberglass market. Sichuan Weibo New Material Group Co., Ltd. the parent company of Sichuan Sincere&Long-term Complex Material Co., Ltd. fiberglass chopped strand mat manufacturer, also play an important role in global fiberglass market. It is the fourth largest fiberglass manufacturer in China.

2016年1月26日星期二

Fiberglass Underground Storage Tank

Fiberglass Underground Storage Tank

Nowdays, fiberglass underground storage tank are widely used in USA. It is because of the high success rate. The historical success rate for the application of fiberglass tanks in USA is primarily due to industry requiring the following high manufacturing standards/quality, industry installation procedures and installer training/oversight.

1.Manufacturing Standards/Quality: Fiberglass underground petroleum storage tanks are manufactured in an automated process rather than a job-shop operation. This automated process lends itself to standardized manufacturing and Quality Control procedures from the time raw materials and components are received, to interim composite sampling and final product testing. While each tank manufacturer follows its patented procedures, the product is performance tested to meet a third party independent laboratory standard Underwriters Laboratories UL 1316 Standard for Glass-Fiber Reinforced Plastic Underground Storage Tanks for Petroleum Products, Alcohols and Alcohol-Gasoline Mixtures. Finally, UL is retained as the Quality Assurance contractor and routinely inspects the manufacturing facility to ensure that Quality Assurance Quality Control (QAQC) procedures are followed. Thus, USA fiberglass tanks are quality manufactured, meet a third party performance standard, follow third party QAQC procedures and come with a 30-year warranty.

2.Industry Installation Procedures: While each fiberglass tank manufacturer publishes detailed installation procedures, the petroleum industry (American Petroleum Institute) and the tank installer industry (Petroleum Equipment Institute) also publish and routinely update underground tank installation standards (API 1516 Installation of Underground Petroleum Storage Tanks and PEI 100 Recommended Practices for Installation of Underground Liquid Storage Systems). These installation standards are codified in the Model Fire and Building Codes by the Authority Having Jurisdiction (e. g., cities, counties and states) and required by the federal government (i.e., Environmental Protection Agency). Thus, the proper procedures for the installation of fiberglass tanks are readily available and mandated in the USA.

3.Installer Training/oversight: Oversight in the USA is required by federal government rules, state inspectors and fire code jurisdictions. For example, New York City has historically required on-site fire personnel oversight while a tank is being installed.

Sichuan Sincere&Long-term Complex Material can supply good quality of fiberglass chopped strand mat used in fiberglass underground storage tank. You can get more details on our website: www.zccyfiberglass.com.

Detail analysis for good FRP molding techniques.

1, the main mold making: making the main form many materials, generally require the materials easy to shape, easy to break, fiberglass chopped strand mat and there is good stability. Such as wood, plaster, wax and so on. We usually use wood. Depending on the product drawing or mold drawings, through the carpenter made wooden mold.
2, the main molding trim: master mold must be repaired before being turned mold production system. Trim include playing putty, change size more positive, reinforcement. During this process is mainly on wood mold surface and overall do basic treatment to ensure the size and form of wood mold coincide with the drawing.
3, the main mold surface treatment: this process has spray coat, gel coat curing, grinding, polishing, stripping wax. In the previous step, spray gel coat on Deal master mold (now usually choose easy sanding primer and high-gloss plastic), and then wait gel coat curing, after curing gel coat sanded gel coat surface. General from dozens of coarse sandpaper number has been hit fine sandpaper around a thousand numbers. After using sandpaper, polishing mold began, marked the final release product. Until this point, the main mode of production is over. Continued master mold can be used to make the production mold.
During this process will use many materials and industrial equipment. Timber and relative woodworking appliance is need. Moreover, putty (also known as putty), sandpaper, sandpaper from coarse to fine sandpaper tens number more than a thousand numbers, gel coat, mold cleaning agent, sealing agent, polishing paste, stripping wax. Moreover, you should use some small tools and instruments, such as sanders, polishing wheels, gelcoat spray gun, pump (or other gas source).

What are the basic characteristics of the gel coat

Gel coat is a thin, spraying or brushing the mold surface of the colored resin. This layer of gel coat protects the mold and the final product, to avoid all kinds of physical and chemical impact. It enables easier demolding products, fiberglass chopped strand mat and improve the appearance quality of the products.
Unsaturated polyester resin (UP) used in gel coat is mainly based on isophthalic (ISO), and usually combined with neopentylglycol (NPG). Others gel coat is based on a vinyl ester resin, when you need a better chemical resistance, this kind of gel coat would be the best choice.
It’s not same to resin, gel coats also contain inert mineral fillers, anti-sag additives (such as silica and pigments, thixotropic agents, etc.), stability-enhancing additives and promote the curing accelerator.
Gel coat mainly as a protective layer for the reinforced unsaturated polyester, which is used in shipbuilding and transportation, cast polymer, bathtub, shower and swimming pool.

2016年1月25日星期一

Advantages of Fiberglass Fish Farming Tank.

Fiberglass Fish Farming Tank is popular in fish farming. Bellows are advantages for your reference.

1. FRP tanks have the characteristic of plasticity, can easily installed the inlet and outlet and overflow outlet at the top or the bottom. They are less cracking in cold and severe weather.

2. Light weight, easy to move. For certain seasonal fish species, the frp hatchery tank is more convenient to changing the water and cleaning the inside. Meanwhile, the fish hatchery tank can also be used to transport the fresh water food or seafood. High impact strength, and loading and unloading very easy.

3. Fiberglass tank is produced by the American standard resin, non-toxic and no precipitation. This resin is without any cytotoxicity effects.

4. Fiberglass material has good thermal insulation effect. When installed to fish farms in the cold winter, it will reduce the energy consumption which required for warming.

5. Fiberglass Fish Farming Tank inherited the higher strength characteristic of plastic fish tank. Moreover, because of the characteristics of composite technology, it can be customized into different shapes. General the fiberglass aquaculture tank designed round type according to the pressure of the physical properties. There is intake pipe outlet in the center and the bottom which designed to pot shape. When used in fish farming, the inlet could design into whirlpool, so that the suspended solids will be concentrated in the tank’s pot shape bottom and whirlpool. The water filtration equipment will take bottom water first and filtering the suspensions maximized.

6. Compared with the traditional fish tank, fiberglass fish farming tank has little pollution to the water, and convenient to drainage, cleaning, disinfection, easily to move. It is more conducive to the growth of fish, could significantly increase the survival rate of fish.

Fiberglass chopped strand mat is one of the materials for Fiberglass fish farming tanks. You can find and purchase on Sichuan Sincere & Long-Term Complex Material Co., Ltd.

Global Market of Fiberglass will be valued at USD 10.1 Billion till 2020

FRP is a type of fiber reinforced plastic, and in which the reinforcement fiber is specifically glass fiber. Glass fiber can be chopped into certain length and randomly arranged, compressed into a sheet, called fiberglass chopped strand mat. It also can be woven into a fabric like woven roving. The plastic matrix may be a thermosetting plastic, which is most often epoxy, polyester resin, vinylester, or a thermoplastic. Fiber glass is used in major applications, such as composites, insulations, storage tanks, house building, piping, and filament winding. 

This market is experiencing an enormous growth and is expected to continue a similar trend in the near future. It is mainly driven by highly-growing markets in regions, such as Europe and North America. Global market of fiber glass till 2020 will be valued at USD 10.1 Billion. This market is further segmented, in terms of geographic regions, into North America, Europe, Asia-Pacific, and Rest of the World. The market has also been segmented on the basis of application and type. The major applications for fiberglass are composites, insulation, and others.

At the same time, manufacturing and sales of fiberglass chopped strand mat are also growing very fast with the development of fiberglass global market.

Reasons of Fiberglass Popular in Making Forms

In the past two years, the use of fiberglass as a material to make forms for concrete work has increased rapidly. Here are some reasons:

1. Fiberglass forms provide a means of producing a concrete surface that is architecturally acceptable without rubbing and grinding. 
2. Special patterns and designs can be readily molded into the material. 
3. Large areas or sections may be made without joints or seams. 
4. When repeated usage is possible, fiberglass is often the most economical form material. 
5. Perhaps most important, fiberglass forms allow the architect complete freedom of design. One advantage of fiberglass forms is it is possible to eliminate the joints or seams. 
6. When special conditions dictate building a form in sections, it is possible to join the units in such a manner that the several sections may later be sealed together with additional applications of resin and fiberglass to produce a seamless mold. 
7. Versatility is another advantage. Fiberglass panels can be 100 percent reversible in any situation. Fiberglass is also an excellent insulating material and is impervious to moisture; thus fiberglass forms provide built-in protection against temperature extremes. Although the first cost of fiberglass forms are relatively high, the durability of the material permits almost unlimited reuses. 

In order to save the first cost of fiberglass form, you need to find a best manufacturer or supplier. And you can go to Sichuan Sincere & Long-term Complex Material Co., Ltd to find good quality and price for fiberglass material, such as fiberglass chopped strand mat or woven roving.

2016年1月24日星期日

The concave mold used by fiberglass

The advantages of the composite material, they can be molded into complex shapes is perhaps the most popular. When a shape that needs to be reproduced many times, the most effective way is to create a tool or mold, and manufacture in its inner portion. Molded parts emerge every perfect shape, almost no post-finishing work.
Molding or "seal" has been used for many years for shaping like body, home appliances and industrial lighting and other hardware products. Metal stamping die cumbersome and takes thousands of dollars to produce. Only large companies have the ability to build, operate, store, or even move these tools. Composite materials provide a cost-effective way, everyone can make such a mold, and for the production of plastic parts mass production of the same.
Concave mold has many advantages for medium to large volume production. Finishing time was significantly reduced, because every part of it has a smooth outer surface.
The desired product for mold manufacturing
Surfacing gray primer
Plasticine
Parting Wax
PVC release film
Tooling gel coat
Molding fabric
Woven roving
10 oz fabric
Resin for polyester molding

The application and development of fiberglass(II)

Fiberglass is able to weave all kinds of fiberglass fabric - fiberglass cloth. Fiberglass cloth is not afraid of acid and alkali, fiberglass chopped strand mat so the cloth used in chemical factory is very good. In recent years, many factories have adopted fiberglass cloth instead of cotton, cloth sacks, making bags. Such bags not mold and rot, corrosion proof, durable, very popular with people of welcome, and also save a lot of cotton. Beautifully patterned wall covering large sheet of glass paste, using an adhesive to the wall a nice, eliminating the need for paint and maintenance, dirty cloth as long as a touch, immediately become clean the walls.
Glass fiber is insulation and heat, so it is a very good insulating material. At present, the majority of our motors and electrical plants have extensive use of fiberglass insulation. A 6000 kilowatts of turbine generator, fiberglass insulation parts which do actually reach more than eighteen hundred pieces! Thanks to fiberglass insulation, both to improve the performance of the motor, but also reduces the size of the motor, also it reduces the cost of the motor is really threefold.
Another important application of glass fibers is cooperate with plastics, which manufacture all kinds of glass fiber composites. For example, the layers of glass cloth dipped in hot melt plastic, compression molding since become famous "glass steel." FRP even tougher than steel, neither rust, and corrosion, and weighs only a quarter of the volume of the same steel and therefore use it to make ships, cars, trains shell and machine parts, not only can save a lot iron and steel, and also due to lighten the car, the weight of the boat itself, the effective load greatly improved. Because not rust, you can save a lot of maintenance costs.
All kinds of Glass fibers with good insulation, heat resistance, corrosion resistance and high mechanical strength, which is an excellent inorganic non-metallic materials. Glass fiber with a diameter smaller and intensity increased as the reinforcement material reinforced plastic applications, the biggest feature is the tensile strength. Tensile strength under the standard condition is 6.3 ~ 6.9 g / d, a wet state 5.4 ~ 5.8 g / d. Density 2.54. Good heat resistance temperature of 300 no effect on intensity. Has excellent electrical insulation properties, is a senior electrical insulating material, also used in insulation and fireproofing material shield. Generally concentrated alkali corrosion, hydrofluoric acid and concentrated phosphoric acid.
Glass fiber commonly used as a reinforcing material, electrical insulating materials and insulation materials, circuit boards and other economic fields composite materials. Glass fiber is more high-temperature resistant than the organic fibers, non-combustible, corrosion, heat insulation, sound good, high tensile strength, good electrical insulation. But brittle, poor wear resistance. It usually used as Industrial filter materials, corrosion, moisture, heat insulation, sound insulation, shock-absorbing material. It’s a kind of reinforcing material, it can be used to make reinforced plastic or reinforced rubber, glass fibers as a reinforcing material has the following features, these features make the use of glass fibers is more extensive than other types of fibers.

Composites Help to Win Solar Decathlon Design

Recently, the design of SURE HOUSE won the 2015 Department of Energy (DOE) Solar Decathlon. It is a solar-powered home made with composites repurposed from boatbuilding materials designed to withstand hurricane-force winds and flooding. Designer are students from the Stevens Institute of Technology.

Except for fiber-composite materials, fiberglass chopped strand mat the SURE HOUSE design includes bi-folding storm shutters, which were made with a composite foam core and wrapped with fiberglass. Each layer was placed in a different direction. That is to maximize the strength of the house and protect it against debris and water during heavy storms.

The entire bottom level of the house is completely waterproof and energy efficient. According to the designers, the house save 90 percent energy than a regular home.  They add the SURE HOUSE’s rooftop solar panels can produce around 10,000 watts of power while still being connected to the grid. The team has also built a public USB charging station outside the house that can be used during emergencies.

This project was about creating a real, livable residence for families in coastal communities who will be hardest hit by the effects of climate change. The design provides a blueprint for the construction of homes that can endure extreme weather and epitomizes the principals of sustainable living.

ZCCYFIBERGLASS is a professional manufacturer of fiberglass which can be used in the design of SURE HOUSE. You can find more details on our facebook, twitter or website.

2016年1月21日星期四

The application and development of fiberglass

Glass fiber is beginning to produce from the 1940s. After World War II, fiberglass chopped strand mat,glass fiber products has been greatly developed and applied. This period can be called the first stage of the development of glass fiber products.
With the development of industry in 1960s, changing the glass composition, studying the high strength, high modulus glass fibers. Glass fiber products to a new stage of development, it can be called the second stage of development of glass fiber products.
After 1970s, a variety of enhanced applications for sizing, making enhanced glass fiber products to obtain a large development in the composite material, which greatly promoted the development of the use of glass fiber reinforced plastic products. We can call it the third stage of development of glass fiber products.
China glass fiber industry began in 1958, the production of glass fiber used in the production of frp, which has been 50 years of history. 50 years in the glass fiber industry, we organized a number of technical research and the introduction of foreign technology. Through the joint efforts of the entire industry, there is a certain level of technology to improve. Has used a perforated drain plate, Chiyaolasi, large diameter fiber, the new coupling agent, pre-treatment process, the glass fiber chopped strand mat, surface mat, stitch mat, woven fabrics and other new technology, new technology, so that our glass fiber products is a big step forward, gradually approaching the level of developed countries in the world, has become the subject of reinforced materials industry.
Glass fiber twisted fiberglass rope, can be called a "king of the rope", a finger as thick fiberglass rope, actually be able to lift a loaded cargo truck! Because fiberglass rope not afraid to seawater corrosion, not born rust, so it suitable to used as mooring ropes, crane sling. Although synthetic fiber ropes is good, but it will melt at high temperatures, and fiberglass rope was not afraid, therefore, ambulance use fiberglass rope is very security.

Analysis of Common Problems in use of fiberglass gel coat

Gel coat plays an important role in the composite / FRP produced, which not only on the surface of glass products for decoration, but also abrasion resistance, aging resistance, fiberglass chopped strand mat chemical corrosion. There will be all kinds of problems cracks, sagging in the actual use of the process, from product design to various reasons, the use of gel coat and production operations and other specific analysis.
Gel coat wrinkling
Mainly caused by uneven curing gel coat:
1, the gel coat is too thin, uneven thickness, gel coat curing is not sufficient, reinforcing layer too soon.
2, the ambient humidity, low temperature production environment.
3, ambient air velocity, take away a lot of styrene.
4, with the high moisture content of the curing agent, the curing agent and gelcoat mixing uneven.
5, gel coat base resin has a high content of small molecules, spray coating process into water or dirt.
Pinholes, porous
Gel coat containing gas or small molecules, but during the curing process it had no chance to release.
1, plastic recognize gel time is short, the curing agent is added to a large quantity.
2, gel coat layer is too thick, too much traffic spray, spray painted too much for the first.
3, when mixing the gel coat, bring into a lot of air and it also bring into in the spray time. All of the air is no release.
4, spray atomization bad, too close or too far away from the mold.
5, improper release agent, the mold surface contamination.

New Composite Structural Insulated Panels

Recently, CPBS introduced a fully composite structural insulated panel (C-SIP) designed to continuously insulate and seal the building envelope. Six functions integrated into this C-SIP, fiberglass chopped strand mat including the exterior sheathing, insulation, air barrier, vapor retarder, moisture barrier and structural walls.

The C-SIP wall panels consist of fiberglass reinforced thermoset polymer (FRT) skins bonded to rigid polyurethane foam by a chemical reaction during manufacturing, which eliminates any risk of delamination. The C-SIP 4″ foam core will not settle, shrink or lose insulating value over time, providing significant energy savings.

Serving as an air and moisture barrier, the energy-efficient C-SIP replaces multiple building products with one, enabling LEED and NAHB Green Building points. Many house wraps, water-resistive barriers and laminated or fibrous SIPs suffer damage during installation and fail to prevent water intrusion before finish materials are applied. C-SIP wall panels are engineered to withstand the rigors of the construction process without losing performance value or cutting re-work, saving time and labor costs.

One eco-friendly composite FRT channels are used to join the C-SIP wall panels together and attach to the foundation, floor system and roof structure as well as pultruded composite frame windows. The FRT channels eliminate the use of wood or metal connection materials, which are susceptible to rot, termite or insect infestation, mold and moisture penetration that can dramatically weaken the structure. The structural walls in the C-SIP system eliminate the need to convert studs to expensive 2 x 6 framing, in order to meet progressing energy codes with the added cost of extra insulation.

Here zccyfiberglass can supply fiberglass used in C-SIP. Please contact us for more details.

2016年1月20日星期三

Chinese glass fiber will rule the roost in the world

With the development of market economy, the glass fibers are because it can replace the use of metallic materials are widely used in construction, transportation, electronicsChemical industry, metallurgy, national defense, etc.,fiberglass chopped strand mat so as the needs of these industries continues to increase, fiberglass increasingly people's attention.
According to statistics in recent years indicate that the current global glass fiber industry developed slowly, for 10 years example, glass fiber production capacity is 4.715 million tons, is expected to produce 5.3 million tons this year, which is mainly fiberglass global business expansion plans the reason is very cautious.
From the global glass fiber consumption, global consumption is mainly concentrated in the developed countries, Europe is the world's largest consumer market of glass fiber in an amount of more than 35% of the global total, while the glass fiber chopped strand mat and imports accounted for more than 40% . The United States, Japan is also a major consumer countries, China is still relatively small.
Currently China glass fiber industry more rapid development, the current annual growth rate of about 20 percent, and China is now the world's largest producer of glass fiber, production accounts for more than 60% of global production, it has become a new oligarchy of international markets. But also from the historical point of view, the global glass fiber market has been a oligopoly market. The next, China oligopoly would be difficult to change.
From the profit margin is concerned, glass fiber gross profit foreign giants has remained at around 10 percent, according to forward-looking industry research data show that China glass fiber enterprises after years of development, the quality has reached the upper level, the gross margin has been maintained at between 25% -35%.
From the species, our glass fiber types still relatively small, relatively narrow range of applications, but also by the impact of this year decreased the level of global economic development, China's export levels of fiber glass, but good point is that China With the level of economic development and improvement of domestic demand continues to increase, offsetting the decline in exports caused by pressure.

The largest glass fiber wind rotor in the world

Siemens has built a record-breaking rotor; not only in one aspect. They not only built the world's largest wind turbine rotor blades, but it is also by far the largest cast in fiberglass components together in the world. Giant, fiberglass chopped strand mat 75 m (245 ft) long rotor blades will be installed in the Danish offshore wind turbine prototype. B75 is known as quantum edge of this rotor is almost the length of the Airbus A380.
It has 75 meters length, Siemens has built the world's largest wind turbine rotor blades. Giant components made of fiberglass will be used to the new Siemens offshore wind turbine, power generation capacity of 6 megawatts (MW). They will be installed Østerild in Denmark, Siemens 6 MW offshore wind turbine has a 154 m rotor. Each rotor diameter of 154 meters covering eighteen thousand six hundred square meters, is the size of two and a half football fields. The moving speed of the blade tip of up to 80 meters per second, or 290 kilometers per hour. Huge rotor becomes possible special technology that allows Siemens to make a very strong and lightweight structure.

FRP corrosion characteristics

FRP anti-corrosion characteristics are as follows:
Excellent impact resistance:
The strength of FRP is higher than steel and concrete ductile iron, than about three times the strength of steel,fiberglass chopped strand mat ductile iron 10 times, 25 times of concrete; drop weight 1.5kg without damage under the impact height 1600mm.
Chemical resistant:
Reasonable raw material selection and design of scientific thickness, glass steel corrosion in acid, alkali, salt, organic solvent environment, long-term use, has good chemical stability. Especially water glass steel corrosion is almost zero, good corrosion resistance. Like metal material that does not need rigorous internal and external pipeline coating or cathodic protection, in the lifetime of basic need protection.
Good insulation properties:
Since FRP composite products are made of a polymer material and reinforcing material made with low thermal conductivity characteristics; only metal 1/100 to 1/1000, is an excellent insulation material, the summer to ensure constant running water, avoid microbial breeding.
Thermal expansion coefficient:
Because fiberglass thermal expansion coefficient (2.0 × 10-5 / ), better adhesion to the substrate.
Lightweight, high strength and ease of installation:
Concrete accounts for only 2/3; so comprehensive in terms of weight compared to the light. Thus, loading and unloading easy, easy to install.
Construction process performance:
FRP molding before curing, the fluidity of the resin can be molded using different methods, and easily processed into the desired shape; this characteristic most suitable for large, complex equipment and structure of the overall construction requirements, according to the environmental situation can be on-site construction .
Hydraulic excellent characteristics:
The inner surface of the glass pipe has a smooth, flow friction coefficient. Glass pipe roughness coefficient of only 0.0053 ~ 0.0084, while concrete pipe is from 0.013 to 0.014, a difference of 55% to 164%. In quite the same flow rate and water conditions can be used can be reduced diameter, thereby saving investment. In quite the same caliber and flow conditions of the pump power and energy savings of more than 20%, saving the head, reducing energy consumption.
Excellent physical properties:
Good adhesion, no cracking, scaling, water will not be rusty microbial contamination or oxidation of water, no secondary pollution, to ensure the permanent cleanliness of water quantity and quality output unchanged.

2016年1月19日星期二

FRP in San Francisco Museum of Modern Art

San Francisco Museum of Modern Art (SFMOMA) will re-open on May 14, 2016. The renovation of which was made with FRP is almost done. 

Kreysler & Associates designed the 700 “rain screen” FRP panels. The panels cover and help waterproof the 10-story building. When fastened to the aluminum frame, the panels create a rippling horizontal texture that looks like the waters of the San Francisco Bay. The SFMOMA expansion is the largest use of FRP cladding on a multistory building in North America.

The panels are made from recyclable expanded polystyrene (EPS) foam molds that are milled by a CNC hotwire machine for rough shape and by a five-axis CNC router to create the final double-curved surface. No two panels are alike: most are 5½ feet wide with lengths varying from 6 to 30 feet. The skin thickness is only 3/16th of an inch. Every panel had to be designed and engineered individually to make sure it fit properly onto the aluminum frame behind it.

After completion, fiberglass chopped strand mat the 10-story, 235,000-square-foot addition will offer nearly three times the previous exhibition space. It will debut the new Pritzker Center for Photography—the nation’s largest gallery, research, and interpretative space for photography in any art museum—and feature 260 works from the renowned Fisher Collection and 600 more artworks not seen before at SFMOMA.

Two interesting glass fiber applications

1. Gato del Sol.
While this sounds like an exotic beach location, fiberglass chopped strand mat,which is actually made up of Kentucky State University solar car team for the solar-powered car design name. Car solar powered car makes glass fiber and composite materials laminated to practice. The team in the country about a decade with different versions of the game Gato's. These cars are powered by solar energy, and well-designed. Therefore, aerodynamics and weight design is the key, these are glass fibers play a role. Gato V is set to the season road racing cars.
2. Sally Musu.
Made of glass fibers and known as "the world's largest Holstein cows," Sally musu maximum 38 feet, 50 feet long, along the New Salem, North Dakota's Interstate 94. She was built in 1974, most made of fiberglass. In recognition of the region's dairy industry, who does not love a giant fiberglass cow? Stop and take a picture with Sally Musu.

Fiberglass in Corrosion Market

According to the research, Corrosion of metals costs the U.S. economy $300 billion per year in maintenance, fiberglass chopped strand mat repair and replacement costs. Always an Achilles’ heel for manufacturers who work with metals, this massive problem plays to one of the composites industry’s greatest strengths. Corrosion prevention was one of the earliest applications for glass-reinforced plastics, championed by developers of highly corrosion-resistant isopolyester resin systems. Although that role has since been supplanted — especially in saltwater environments — by epoxy vinyl ester resins, manufacturers schooled in the use of composites continue to make inroads in several markets that have massive long-term potential.

One of the more lucrative strategies is refurbishing degraded municipal and industrial piping as aging infrastructure and postrecession budgets force maintenance decision makers in municipalities and industrial environments to look for options that are less drastic, disruptive and financially disabling than wholesale replacement.

In the case of exposed or aboveground piping, sheet composite is wrapped around the pipe, acting as reinforcement for pipe walls that have been thinned by corrosive attack. Sheets of carbon fiber fabric are fed through rollers that apply a two-part proprietary epoxy to the material. The fabric is then directly wound spirally or in bands around the pipe. The epoxy, which has about a two-hour pot life, saturates the fabric and adheres to the metal substrate, bonding the carbon fiber to the pipe.

2016年1月18日星期一

Fiberglass Vs. Metal in Classic Corvette Restoration

When it comes to classic Corvette restoration, you have two primary options for body materials - Fiberglass material and steel and fiberglass chopped strand mat. Each option has its pros and cons, and what is best for one hobbyist may not work so well for another. Here are some of the things you need to consider when picking your materials for classic Corvette restoration.

No.1 Bragging Rights

Although Fiberglass material bodies are often more practical, collectors typically view steel as the gold standard for classic Corvettes. It has that authentic look, feel, and heavy weight reminiscent of pre-WWII American cars. Even steel reproductions of old Corvette bodies are seen as "more authentic" than the Fiberglass material models.

No.2 Price

In almost every situation, a Fiberglass material body is going to be cheaper than its metal counterpart. Counting the body work and classic car paint jobs often necessary with metal originals, restoring Corvettes with steel bodies can cost over ten thousand dollars more than with Fiberglass material.

The difference in price doesn't necessarily reflect a difference in quality, however. Although Fiberglass material used to be seen as a cheap imitation material, companies are now making glass bodies which look and feel almost exactly like the originals. This value is the main reason for the widespread use of Fiberglass material among the classic Corvette community.

No.3 Availability

The availability of Fiberglass material reproductions usually depends on current trends in the restoration market. While it is generally easier to find a given car body made from Fiberglass material than from steel, a lack of demand for a certain year's model can make it difficult to acquire.

 On the other hand, the availability of steel originals is unaffected by market trends. While most steel Corvette bodies are hard to come by, certain models may not exist at all in Fiberglass material. For classic Corvette restorers interested in rarer models, steel may be the only viable option.

No.4 Environmental Conditions

 Steel and Fiberglass material are both subject to wear and tear from certain elements. Steel is resilient under a wide range of temperatures, but it corrodes easily. People who live in wet or snowy areas will thus find it easier to maintain Fiberglass material Corvettes.

 However, Fiberglass material can easily warp in hot environments. When this happens, it also releases chemicals into the air and can turn a dingy green color. If available, steel may be a better option for enthusiasts who will have to store their cars in hot areas.

No.5 Workability

For amateur restorers, steel can be much easier to work with than Fiberglass material. It requires little special equipment or training, and simple cutting, grinding, and welding techniques are often sufficient for restorations and repairs. Making repairs to Fiberglass material requires the precise mixing, cutting, and laying of new glass. Overall, the material is much less forgiving than steel.

Of course, these concerns are only important to those who plan on doing their own body work. For classic Corvette restoration enthusiasts who want bodies already in excellent repair, reproductions - most often Fiberglass material - may be the best option.

During the Restoration, you can find chopped strand mat on zccyfiberglass.com

Replacing stainless steel with FRP

With the rise in the price of stainless steel over the past seven years, FRP has opened up new opportunities to compete for business in the chemical-storage and fluid-handling markets. The trend upward in alloyed steel prices over this period has made FRP a better choice in many cases because not only will it outperform steel,fiberglass chopped strand mat it has had a better price point.

Because many end-users have traditionally specified alloyed steel for corrosive applications, glass suppliers have been playing catch-up, having to educate customers about the nuances of composite structure, performance requirements in highly corrosive environments and the need to specify the right glass. Although the more robust vinyl ester is now the standard resin widely used in FRP tanks, some end-users are still specifying E-glass and boron-free E-CR glass. 

Resin suppliers have been doing a better job of educating the end-users on the right materials to use in corrosive applications, whereas glass suppliers have sort of dropped the ball by mainly interacting with only the fabricators. Owens Corning recently published a Glass Fiber Chemical Resistance Guide to help customers select glass reinforcements in corrosive environments. You can also get more information of the chopped strand mat in corrosive application on our web: zccyfiberglass.com.

Glass fiber development advantages in transportation industry

During 2010 to 2015, China plans to build urban rapid rail transit project a total length of 1,700 kilometers, fiberglass chopped strand mat will gather more than 5000 billion investment in this area. Progress FRP / composites in rail traffic from fiberglass / composite zero devices to full fiberglass / composite nose, box and so exhibit a great advantage in the field of rail transportation and its wide application in front of the scene .
FRP pultruded profiles, vehicle sales in China in 2009 amounted to 13 million vehicles. With the revitalization of the national transport industry plan enacted, it will accelerate the increase in the total amount of application of FRP / composite products in the vehicle. We expected a few years from now our transport industry in the amount of glass fiber reinforced composite materials will reach 100,000 tons of scale. Global cruise boat and shipbuilding licensed about 1,800 million vessels. With the momentum of improvement in the world economy, foreign cruise companies relocate to the mainland and the needs of our high-yield sectors, boat equipment and sea in southern China plans to build international tourism island and coastal areas, and the next few years our country will have a big cruise industry Progress. Shipbuilding is a large market of glass fiber, Europa Island harmony happy country has a government it provides essential 40-60 foot boat with a glass fiber reinforced composite materials.
In 2003 that has been confirmed to be out of all the Beijing-Hangzhou Grand Canal in Shimin Tu ship in the next few years, and along the coast nearly one million small wooden fishing boat in the phase-out of the office have been implemented over the years. After elimination Shimin Tu boats and wooden fishing boats, the best small-scale marine material is glass fiber reinforced composites.

2016年1月15日星期五

Comparison of carbon fiber and glass fiber

weight
How to compare the glass fiber and carbon fiber? When compared with other composite materials, the glass fiber is not so efficient. But the glass fiber is still lighter than conventional materials (wood, steel, etc.). It is given for strength, fiberglass chopped strand mat weight demanding project, the carbon fiber will perform better.
Strength and durability
Similarly, the carbon fiber will surpass glass fiber in its tensile strength (the fiber force required to pull apart) and compressive strength (downward pressure on the fiber strength). However, the glass fibers are more "durable", you can put glass fiber close to its breaking point, but not too obvious, like carbon fiber.
Failure mode
In addition, once the carbon fiber reaches its breaking point, catastrophic failure mode (it will fracture / broken pieces.) And glass fiber, on the other hand, will produce cracks or deformation prior to fracture.
cost
Unfortunately, due to the nature of the carbon fiber, compared to other materials, he is more expensive. So, excellent strength, glass fiber weight if your item is less demanding, and will not need to come from carbon fiber is a good choice.

Glass fiber composites superiority

As the glass fiber reinforced fiberglass excellent mechanical, physical and chemical properties of the composite body products are well known. Glass fiber reinforced thermoplastic composites also have better overall performance.
Through the glass fiber reinforced polypropylene, in addition to maintaining the original excellent performance, fiberglass chopped strand mat ,strength, hardness and rigidity has improved greatly, and has good heat resistance, dimensional stability, low temperature impact resistance, arc resistance and contraction rate and small, improve the performance of products, expand the application areas of polypropylene.
Abs glass fiber reinforced resin, not only to maintain the original mechanical, electrical, heat resistance and workability, but also improve the elastic modulus of ABS, rigidity, heat distortion temperature, dimensional stability and reduce the linear expansion coefficient and molding Shrinkage.
Since the glass fiber-reinforced composite material properties and shape itself particularity, the reinforcing material complex also has some distinctive features. Whether mechanical properties, physical properties or chemical properties of glass fiber reinforced composite material has its attractions.

Smart sensor glass fiber, which can become clothes

In the near future, if you wear clothes that you heat up, it will automatically become loose breathable; If you feel you are cold,fiberglass chopped strand mat wrap it tightly. Chinese Academy of Engineering launched the "New Materials International Development Trend Forum," including more than 40 experts, including academicians materials sector under one roof to explore: What is the "ratio of new materials updated material"? Have "features" like sensing capabilities, and can because of the need to change is one of the characteristics of smart materials, such as fiber materials can be used in intelligent clothing.
At present, the application of smart materials to achieve three main categories: a corresponding change in accordance with a voltage different ferroelectric materials, the magnetic field strength of the strain of magnetostrictive material, and can be changed back to the original shape memory metal.
Reporters learned that, Xi'an Jiaotong University materials science, "Changjiang Scholar" Ren Xiaobing led team has successfully developed a new type of smart material - Strain glass. It has a certain flexibility, even if the temperature change does not appear thermal expansion and contraction, but also according to the application scenario "cold thermal expansion." The new material can be used in cell phones, hand ring terminal, also can become a fiberglass clothes, but also widely used in precision instruments. Ren Xiaobing explanation, the strain is actually a glass doped with impurities in a few key shape memory alloy.

2016年1月12日星期二

Fiberglass Door VS other Doors

When it comes to selecting an exterior door for your home, bellows are choices for your reference. But which one is the best? Let’s see.

 Wood Doors

 Wood doors are the oldest type of door and they provide the widest scope of decorative options. Traditional wood doors can be painted or stained, a project that many DIYers can handle. Nowadays, wood doors are stronger than they used to be. Wood doors are thick and heavy and provide a good amount of security. However, they are not as secure as fiberglass or steel. In some cases, wood doors can be kicked in. Wood doors are available in a variety of finishes. There are several decorative options available for wood doors, including glass windows. Wood doors are not recommended for hot climates, as the extreme heat could cause the door to swell, resulting in damage to the door.

Steel Doors

 Steel doors are the most energy efficient of the three types of door. The downside to steel doors is the limited decorative options. Steel doors are the best option for those who live in areas that are subject to harsh weather. Steel doors are strong enough to stand up to high winds. Other advantages include their resistance to chips, cracks and warping and their fireproof nature. Plus, steel doors are proven to prevent the spread of fire. Steel doors can be dented but can also be repaired. 

When selecting a door for your home, weigh the pros and cons of each door type to find the one that suits you best. Consider your climate, the importance of security and whether decorative options are important to you.

Fiberglass Doors

 Fiberglass doors are strong, secure and energy efficient. They are known as one of the most durable types of exterior door. Fiberglass doors look and feel like wood but won't crack, warp, scratch, peel, swell or expand like wood. In fact, they are three times stronger than wood doors. Fiberglass doors have a wood-grain texture molded into them which gives the appearance of an actual wood door. Some fiberglass doors resemble wood doors so closely that it is hard to differentiate the real wood and the fiberglass. Fiberglass is a greater insulator than wood, making these doors an energy-efficient choice. There is also minimal maintenance associated with fiberglass doors.

ZCCY fiberglass can supply the best material(fiberglass chopped strand mat) for fiberglass door. If you are interested, please feel free to contact us.

The recommendations of fiberglass used in the reinforced concrete

Production of glass fiber reinforced concrete is not just to add fiberglass chopped strand mat some fiber to the concrete mixed. There are many important considerations to keep in mind. Here are a few:
1. The fiber content - glass fiber reinforced concrete relies on fiberglass high load. If there is not enough fiber in concrete, it will not be in the face of high tensile load, and it will not be resistance to cracking and breakage. Fiber content changes, but at least 3% of the total weight of the mixture. Some mixed, up to 10% of the fiber content. The more fiber, glass fiber reinforced concrete exhibits stronger, but does increase the fiber will lead to lower operability, and even endanger the compaction. However, the fiber strength is lowered due to the worse the problem. Some concrete countertops teacher suggested that only 2% of the fiber. I do not know the motivation behind this is, but 2% is not enough. 3% minimum.
2. Hybrid fiber - orientation is also very important. Truly random fiber orientation means more fibers are needed, because many fibers will point in the wrong direction. Some concrete countertops teacher support and recommendations to create a fluid mixture into the form. This was not done, because it leads to random fiber orientation.
3. The method of reinforcement used. Usually there are concrete and glass fiber reinforced concrete using three different levels of reinforcement. Each type has different benefits.

How to Searching for Fiberglass Supplies

When a person want to make any item from fiberglass, he/she will need to have supplies. To understand what types of supplies that are necessary, one will need to know the main ingredients of fiberglass. Fiber glass is typically a product consisting of a combination of two main items. These are plastic and fibers of glass. It has many applications and uses. Therefore, anyone who is looking to for fiberglass supplies should determine what he or she intends to make with it. For example, one could be planning to remodel a car interior, a boat, or even to create a non-slip floor and so on.

First, one could seek raw materials for making the actual fiberglass. In other words, one would do this if he or she wants to produce this product just as other top brands do. Getting the best supplier for these raw materials can be tricky.

The best way to go about it would be choosing merchants who have been in the market for a long time. Such dealers have adequate experience and knowledge of the best materials available for sale. What is more, they can relieve one the hassle of searching the origins of quality fiber reserves. If one manages to order high quality supplies, then he or she can manufacture superior final products. This is good for any business, as the clients would not have any problems ordering the same product repeatedly. Another way to approach this issue is buying readily made fiberglass for sale. In other words, a person could decide to set up his or her own fiberglass supplies store. 

Whether he or she wants to launch an offline or online retail store, a source of cheaper wholesale materials would be inevitable. This is exactly why the advent of Internet is beneficial to all people. Through a simple browsing exercise, one can find several wholesalers who provide cheaper materials for resale or for personal uses. These might include websites such as zccyfiberglass.com, Amazon, which contains reviews of products too. In case one wants to carry out fiberglass related projects at home, he or she must look for special goods. 

Again, these will depend on the type of project one intends to do. For instance, the project could involve door and window repairs. The needed materials in this case would mainly include replaceable fiberglass doors and windows. If one wants to create something with a glass fiber cloth, then he or she must obtain best resins and the cloth itself. Hardeners and solvents would also be imperative. A person who owns a commercial building that attracts many people may want to change its slippery floors. In this case, he or she would opt for fiberglass grating supplies. All these examples emphasize why one should set a purpose for buying fiberglass supplies.

You can also find one of the best suppliers for fiberglass chopped strand mat on zccyfiberglass.com

2016年1月10日星期日

The quantity of fiberglass chopped strand mat per roll

 Fiberglass chopped strand mat is cut short the original silk 3-5mm to unidirectional uniform shaped glass fiber products. Chopped strand mat finished product is wrapped on a core into a roll, carton packaging. So how much a bunch of chopped strand mat weigh?
Glass fiber chopped strand mat according to weight has 100g, 150g, 225g, 300g, 450g and so on. In accordance with the width from 200mm-3200mm, routine use of the product for the 300g / 1040mm, 450g / 1040mm, similar to the conventional product packaging, powders are 35kg/roll, emulsion bundle has 36kg/roll, Moreover, car roof mat 100g / 1040mm have 22kg/roll. There are many other weight, width specifications. Here means that different widths and different specifications of the products, produced by the chopped strand mat roll weight is not the same.
The standard weight of glass fiber chopped strand mat 300g, 450g, 1040mm width on national standards that is powder 35kg, emulsion 36kg, there is a formula that can calculate the width of the product to other roll weight: Other Width ÷ 1040 × 35 (36) = heavy volume. Powder multiplied by 35, multiplied by 36 emulsion, this should be easy to understand. Another roll length, but also sets a formula calculation: volume = volume weight length ÷ width ÷ weight. Very simple, there are two formulas, any specifications, roll length, volume weight easily calculated.

How to deal with the hand lay-up fiberglass products problem?

Local contraction
Fiberglass chopped strand mat is mainly due to partial amount of resin too much, or too much product partial thickness.
Approach:
Prevent corner, avoid too much resin stage the recess.
After the product fully cured, we can add reinforcement materials.
Product charred
Products charred mainly due to the too much amount of curing agent and accelerator, poor thermal environment, or products too thick paste.
Approach:
Strict control the dosage of the curing agent and accelerator.
Use the method of Stratified curing construction.
Products lack of hardness and stiffness
Product lack of hardness and stiffness is mainly due to improper selection, or not completely cured.
Approach:
Control the amount of hardener and accelerator, an appropriate increase in the proportion of its amount.
Ambient room temperature should be at 18 condition after curing time of 3h.
Check the amount of reinforcing material, whether or not appropriate.