Long fiber sheet molding compound and manufacturing method thereof

Abstract

The present invention provides a long fiber sheet molding compound and a manufacturing method thereof. The long fiber sheet molding compound has a first resin layer, a second resin layer and a hybridlayer being disposed between the first resin layer and the second resin layer. The hybrid layer has a fiber mesh structure being formed by a plurality of fiber silks which are discontinuous and twisted to each other to have a non-directional distribution. The manufacturing method of the long fiber sheet molding compound at least has following steps: a material providing step, an adhesion step anda lamination step. Thus, compared to the prior art, the long fiber sheet molding compound of the present disclosure can efficiency reduce a fiber content, a thickness and a weight, and an anti-slicingstrength, an anti-bending strength and an anti-bending modulus can be uniform in any direction.

Description

technical field [0001] The present invention relates to a fiber sheet molding compound, in particular to a long fiber sheet molding compound which can effectively reduce fiber content, thereby reducing manufacturing cost, structural thickness and weight, and a manufacturing method thereof. Background technique [0002] The known fiber sheet molding compound is composed of a fiber material and a resin material; the strength, rigidity and dimensional stability of the fiber sheet molding compound are far superior to the resin material, so it is often used in various molded products manufacture. Therefore, the demand for the fiber sheet molding compound is increasing year by year in various fields. [0003] Since the fiber sheet molding compound has a wide range of uses, its quality must be strictly controlled. How to reduce the manufacturing cost while maintaining the same flexural strength and flexural modulus of the fiber sheet molding compound It is a big subject. Such as...

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Problems solved by technology

In addition, when making the fiber sheet molding compound, the plurality of short fiber bundles M1 are sprinkled on the surface of the lower resin layer R in a spraying manner. Slurry particles are generated, thus causing the aforementioned harm again; and, the plurality of short fiber bundles M1 will generate static electricity due to friction and cluster together, so in fact, they cannot be evenly distributed on the surface of the resin layer R, so The formation of a large number of pores M2 leads to the loose structure of the fiber sheet molding compound, which in turn causes the defect that the physical properties of the fiber sheet molding compound are not stable and uniform in each region

[0004] The previously known fiber sheet molding compound with high strength, high rigidity and high dimensional stability also has the following disadvantages: 1. The length of the short fiber bundles used in the mixed layer is mostly between 25 and 30 mm, and The short fiber bundles are separately distributed and not entangled. If the quantity of the short fiber bundles is insufficient, the gap between each of the short fiber bundles will be too large, so that the structural strength of the mixed layer is insufficient; For flexural strength and flexural modulus, a large amount of short fiber bundles must be used to reduce porosity, resulting in the weight percentage (wt%) content of short fibers in the fiber sheet molding compound must be 30% to 50% Between, thus increasing the weight and thickness of the fiber sheet molding compound

2. When the fiber sheet molding compound is subsequently cut and processed, it is easy to form the dust particles of the short fiber and the slurry and spread in the air. If the processor accidentally inhales it, it will endanger the health and safety of the processor

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