Processing method for sandwich fiber reinforced thermoplastic composite products

A fiber-reinforced, composite material technology, applied in the field of polymer composite material processing and molding, can solve problems such as smoothness, low brightness, rough outer surface of the target product, and reduced fiber reinforcement effect, so as to improve the appearance aesthetics, enhance product value, Guaranteed smooth finish

Inactive Publication Date: 2019-01-29
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above traditional processing method allows the fibers to be basically evenly dispersed in the resin of the target product. The outer surface of the final target product is rough, with low smoothness and brightness. For some materials with high fiber content, the fibers on the outer surface of the product are exposed. serious, even common
[0005] Due to the shearing action of the screw in the extrusion process and injection molding process, and the friction when the fiber enters the mold through the nozzle of the injection molding machine, the length of the fiber is seriously shortened, which reduces the effect of fiber reinforcement.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The formula of present embodiment polycarbonate composite material consists of:

[0024] The polycarbonate was Bayer's PC2407, 88.7 parts.

[0025] The toughening agent is Zhongyuan's MBS core-shell type toughening agent, the brand is M511, 10 parts.

[0026] The light stabilizer is LA-944 from Changchun Chemical Industry, 0.6 part.

[0027] Heat stabilizer is Changchun Chemical Industry 2112, 0.4 parts.

[0028] The lubricant is domestic EBS, commercially available, 0.3 parts.

[0029] The carbon fiber is Toray's T300.

[0030] The above composite materials are mixed, melted, and pelletized into polycarbonate composite material particles through a twin-screw extruder, and then produced by injection molding with a mold whose wall thickness is only half of the target notebook shell wall thickness. Polycarbonate composite notebook shell, and then stick a carbon fiber layer with a thickness of 0.5mm (the carbon fiber is impregnated and solidified with molten polycarbon...

Embodiment 2

[0044] The prescription of present embodiment polypropylene composite material consists of:

[0045] Polypropylene is PP7926 resin, 94.7 parts.

[0046] The compatibilizer is polypropylene grafted maleic anhydride 1001, 5 parts.

[0047] The lubricant is domestic EBS, commercially available, 0.3 parts.

[0048] The glass fiber is T835 of Taishan glass fiber.

[0049] The above composite materials are mixed, melted, and pelletized into polypropylene composite material particles through a twin-screw extruder, and then passed through a mold with a wall thickness that is only half the thickness of the target car door trim panel by injection molding to produce a wall thickness that is only half the design thickness Polypropylene car door trim panel, and then the thickness of 1mm polypropylene-based glass fiber prepreg tape (glass fiber mass fraction at 97%, molten polypropylene resin 3%) is attached to the target car door trim panel. On the surface of the middle surface of the p...

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Abstract

The invention belongs to the technical field of polymer composite machine shaping, and specifically relates to a processing method for sandwich fiber reinforced thermoplastic composite products. The method includes processing a thermoplastic material product whose thickness is half of that of a target product by using a mould whose thickness is half of that of the target product through injectionmoulding; pasting a fibrous layer on the surface, close to the intermediate surface of the target product, of the thermoplastic material product whose thickness is half of that of the target product;placing the thermoplastic material product pasted with the fibrous layer in the mould of the target product; and producing a smooth appearance, large rigidity and high intensity sandwich fiber reinforced thermoplastic composite product through injection moulding.

Description

(1) Technical field [0001] The invention belongs to the technical field of polymer composite material processing and molding, and in particular relates to a processing method of a sandwich fiber reinforced thermoplastic composite material product. (2) Background technology [0002] Fiber-reinforced thermoplastic composite materials are more and more widely used, and glass fiber-reinforced composite materials with large economic cost advantages, especially long glass fiber-reinforced composite materials, have been widely used in the field of automobile lightweight and have achieved obvious economic benefits. [0003] In the prior art, fibers and thermoplastic materials are processed into plastic particles in the form of twin-screw or single-screw extrusion and blending in the material manufacturing stage to form fiber-resin mixed materials. Long-fiber composites are also produced by impregnating fibers with resin and processed into longer-length fiber-resin hybrid material pa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/30
CPCB29C70/30
Inventor 杨桂生高军李术蒋超杰李枭
Owner HEFEI GENIUS NEW MATERIALS
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