Novel glass mat-reinforced thermoplastic (GMT) board and production process thereof

Abstract

The invention discloses a novel glass mat-reinforced thermoplastic (GMT) board and a production process thereof, relating to the field of office partition plates, vehicle and boat boxboards, container boards and building decoration products. Polypropylene fibers, alkali-free coarse glass fibers and alkali-free fine glass fibers are primarily mixed in a proportion of 5:4:1, and are fully mixed through a large bin, a cotton box and carding equipment to prepare a semi-finished product. The semi-finished product with a certain size is subjected to hot-pressing compounding through a pressing machine at the temperature of 230+ / -5 DEG C, within 130+ / -10 seconds and under the pressure of 7+ / 2MPa to form a board. The novel GMT board is simple in structure and reasonable in design; the proportion of high-strength alkali-free coarse glass fibers to high-strength alkali-free fine glass fibers to modified polypropylene fibers is optimized; a machining process is improved; high-strength and low-weight GMT products are successfully tested and produced in batch; under the conditions of the same weight and the same density, the strength of the board is improved, the novel GMT board is applied to a vehicle, the weight of the vehicle can be reduced, and a great environmental benefit is brought.

Description

Technical field: [0001] The invention relates to the field of related office partition boards, vehicle and ship box boards, container boards and building decoration products, and in particular to a GMT board used for automotive interior materials. Background technique: [0002] The traditional GMT sheet includes an intermediate layer made of glass fiber needle felt or woven mixed felt, a surface covering layer made of PP sheet or molten PP resin, and a bottom layer made of non-woven fabric. The middle is to impregnate the glass fiber felt by high temperature melting. Since polypropylene is a non-polar high polymer and has no affinity with glass fiber, it is difficult to combine the cross section of the resin matrix with the glass fiber, resulting in delamination when the sheet is molded. At the same time, due to the extensive use Adhesives, causing pollution to the environment. Invention content: [0003] The technical problem to be solved by the present invention is to o...

AI Technical Summary

Problems solved by technology

[0002] The traditional GMT sheet includes an intermediate layer made of glass fiber needle felt or woven mixed felt, a surface covering layer made of PP sheet or molten PP resin, and a bottom layer made of non-woven fabric. The middle is to impregnate the glass fiber felt by high temperature melting. Since polypropylene is a non-polar high polymer and has no affinity with glass fiber, it is difficult to combine the cross section of the resin matrix with the glass fiber, resulting in delamination during molding of the sheet. Adhesives, causing pollution to the environment