Glass fiber reinforced plastic sheet is a kind of material molded by professional machines, and a small part of it can be made purely by hand, but the cost is higher. The glass fiber sheet has good toughness, high strength, low density, excellent corrosion resistance and heat resistance, good formability, and long shelf life. It is a green and environmentally friendly material with low energy consumption and no environmental pollution; the glass fiber steel sheet contains The amount of yarn directly affects the toughness and strength.
The production of FRP is basically divided into two categories, namely wet contact type and dry pressure forming. For example, according to the characteristics of the process, there are hand lay-up molding, lamination molding, RTM method, extrusion method, compression molding, winding molding and so on. Hand lay-up also includes hand lay-up method, bag press method, spray method, wet paste low-pressure method and moldless hand lay-up method.
More than 90% of FRP products in our country are produced by hand lay-up, and the others include molding, winding, and lamination. Japan's hand-laying method still accounts for 50%. From the perspective of countries in the world, hand lay-up still accounts for a considerable proportion, indicating that it still has vitality. The hand lay-up method is characterized by molding with wet resin, simple equipment, low cost, and can paste the whole product over 10m at a time.