Formation of glass fiber chopped strand mat
The glass fiber chopped strand mat is formed by cutting the glass fiber strand cake (untwisted roving is also possible) into 50mm long strands with a cutter, and then settles in a disorderly manner on the stainless steel mesh belt to form glass fiber mat. The chopped strands are bonded together by spraying binder + or water spraying, and powdered binder is removed, and then dried at high temperature and shaped. Form glass fiber emulsion chopped strand mat or powder chopped strand mat.
1. Raw materials

The glass commonly used in FRP products is a calcium-alumina borosilicate with an alkali content of less than one percent. It is often referred to as "E" glass because it was originally developed for electrical insulation systems.

Glass fibers are produced by transporting molten glass from a melting furnace through a platinum jacket containing a large number of small holes, where it is drawn into glass filaments. Filaments for commercial use are typically between 9 and 15 microns in diameter. Before the filaments are aggregated into fibers, the emulsion is attached. The fibers are very strong - the tensile strength is exceptionally high. They also show good chemical and moisture resistance, have excellent electrical properties, are immune to biological attack, and do not burn, with a melting point of 1500°C - excellent performance in plastic reinforcements.

Fiberglass can be used in a variety of ways, chopped into short lengths ("chopped strands"); aggregated into loosely bound ropes ("rovings"); woven into various fabrics, continuous by twisting and doubling the yarn yarn strands. In the UK, the most widely used fibreglass material is glass chopped strand mat, which consists of strands of fibreglass chopped to about 50mm, held together in mat form using a polyvinyl acetate or polyester binder. The fibreglass mat can range in weight from 100 gsm to 1200 gsm and is useful for general reinforcement.