What are Reinforced Plastics (GRP&CRP) ?

Two common types of Reinforced Plastics are glass reinforced plastics (GRP) and carbon reinforced plastics (CRP.) Reinforcement can be defined as the act of making something stronger by adding material that offers additional support or structure. Reinforced plastics are plastics whose characteristics have been enhanced by adding other materials. For example, reinforced plastics are typically sturdier and less affected by heat than normal plastics. Reinforced plastics are used in various industries to produce different types of products. 

Plastics are considered versatile materials. In many cases, however, if something is not added, plastics are too weak for the purposes that people would like to use them. These weak materials by themselves are often called a matrix.

Reinforcing plastics generally makes them stronger and more elastic. The degree of strength and elasticity can be affected by factors such as the type of reinforcing material, the concentration of that material, and the positioning of the material. When something is added to a matrix, the resulting product is often called a composite.

Making GRP involves combining a thermoplastic, such as polyester, with fibers of glass. There are several methods of accomplishing this but a popular one involves making a mat from the glass fibers. This can be done by arranging the glass fibers in desired directions, making multiple layers, and binding them with the thermoplastic. The products made with GRP are often produced using molds.

It is believed that the idea was developed in the United Kingdom during World War II, but generally, no specific date or inventor is recognized. There are currently many manufacturers of these reinforced plastics. Material of GRP such as fiberglass chopped strand mat is often used to make parts for yachts, high performance cars, and airplanes.