A kind of glass fiber mat reinforced thermoplastic composite material and preparation method thereof

Abstract

The invention discloses a glass fiber mat reinforced thermoplastic composite material, which is mainly formed by hot pressing of glass fiber mat and resin matrix, wherein the weight percentages of each component are: glass fiber mat 35-60wt%; resin matrix 40-65wt% . Wherein, in terms of weight percentage, the glass fiber mat includes 90-97wt% of glass fiber bundles and 3-10wt% of adhesive; wherein, the length of the glass fiber bundles is 15-70mm, and the fiber diameter is 5-20um; the bonding of the glass fiber mat The agent is selected from at least one of thermosetting adhesives; the thermosetting adhesive is selected from at least one of unsaturated polyester adhesives, polyurethane adhesives, and urea-formaldehyde resins; thermoplastic resins at 190 ° C , under the load of 2.16 Kg, its melt mass flow rate is 25~60 g / 10min. A glass fiber mat reinforced thermoplastic composite material of the present invention has the advantage of low odor, and has excellent tensile strength, notched impact strength and moldability.

Description

technical field [0001] The invention relates to the field of composite polymer materials and processing thereof, in particular to a glass fiber mat reinforced thermoplastic composite material and a preparation method thereof. Background technique [0002] Glass fiber mat reinforced thermoplastic is a new type of engineering plastic. Glass fiber mat reinforced thermoplastic is a composite material with thermoplastic resin as the matrix and glass fiber mat as the reinforced skeleton. Generally, semi-finished sheets can be produced, and then directly processed into products of the required shape. It can be chopped glass fiber mat or continuous glass fiber mat, and the thermoplastic resin can be general purpose plastic, engineering plastic or other high performance plastic. Glass fiber mat-reinforced thermoplastics have good mechanical properties, short molding cycle, low production cost, can mold large and complex parts, and have good dimensional stability. They are widely use...

AI Technical Summary

Problems solved by technology

The product obtained by this patent uses glass fibers in the glass fiber mat with a fixed length of 3~24mm, which is bonded by a wet process with an emulsion adhesive. The odor of the emulsion adhesive is large, which limits the product's internal Use on trim and other parts with strict odor rating requirements

At the same time, the patented product is obtained through the banburying process, and the glass fiber will be damaged and shortened during the banburying process, resulting in low mechanical properties

In this patent example, under the premise that no compatibilizer or a large amount of compatibilizer is added to the formula, the tensile performance is low (30~50MPa), and the impact performance is low (2 ), which cannot meet the strength requirements and impact resistance requirements of the body and main load-bearing structure

Although the tensile strength and flexural strength are increased (>100 MPa) after adding a large amount of maleic anhydride grafted modification in this formula, the cost is greatly increased and the odor of the product is even heavier