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.