Processing technique for longitude and latitude overlapped non-weaving compound material

Abstract

The invention relates to a longitude and latitude overlapped non-weaving compound material, in particular to a processing technique for the longitude and latitude overlapped non-weaving compound material. The product of the invention produced by using a 0 to 90 degrees two-way device can solve the problem that fiber cannot be steeped thoroughly in thermoplastic resin and can ensure that the fiberis fully steeped in a dipping tank so as to greatly promote the physical properties and the mechanical properties such as product tensile strength, flexural strength, and the like. The 0 to 90 degrees two-way product has same physical properties and the mechanical properties on horizontal and longitudinal directions so as to meet the high-performance demands of various products.

Description

technical field [0001] The invention relates to a warp and weft overlapping non-woven composite material, in particular to a processing technology of the warp and weft overlapping non-woven composite material. Background technique [0002] The development of modern high technology is inseparable from composite materials. Composite materials play a very important role in the development of modern science and technology. Among them, continuous fiber-reinforced thermoplastic resin composite materials have excellent mechanical properties such as high tensile strength, bending strength / mold Weight, high and low temperature impact strength, etc., and has the characteristics of relatively low density and recyclability, so it has been greatly developed in recent years. [0003] The patent with the publication number CN101474868A discloses a continuous reinforced thermoplastic resin composite material and its preparation equipment. However, the material has certain limitations: 1. ...

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Problems solved by technology

[0003] The patent with the publication number CN101474868A discloses a continuous reinforced thermoplastic resin composite material and its preparation equipment. However, the material has certain limitations: 1. The glass fiber content of the unidirectional sheet produced according to the CN101474868A patent process is very low. 55%, while the glass fiber content of products produced by 0-90° two-way equipment can reach 75%, or even exceed; 2. The problem of incomplete impregnation of fibers in thermoplastic resins will directly affect the quality of products and finished products. Physical properties and mechanical properties, the key part of the patent of CN101474868A is that the fiber is passed through the twin die heads of thermoplastic resin in the extruding molten state, and the fiber is impregnated in the "S" type process, which can only be achieved by the tension of the fiber and the mouth of the die. The pressure of spraying molten resin or impregnating against the die mouth, its products cannot ensure that every bundle of fibers is impregnated