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Method capable of reducing the surface defects of fiber reinforced thermoplastic composite products

A composite material and fiber-reinforced technology, which is applied in the field of reducing surface defects of fiber-reinforced thermoplastic composite materials and fiber-reinforced thermoplastic composite materials, can solve problems such as easy high-temperature oxidation, high viscosity, and poor fluidity, so as to reduce the effect and improve the qualified rate , The effect of speeding up the batch industrial production process

Active Publication Date: 2013-04-17
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For some fiber-reinforced thermoplastic composites, due to the high-temperature oxidation of the resin in the air, the relatively high viscosity and poor fluidity after melting, there is no corresponding defect repair technology.

Method used

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  • Method capable of reducing the surface defects of fiber reinforced thermoplastic composite products
  • Method capable of reducing the surface defects of fiber reinforced thermoplastic composite products
  • Method capable of reducing the surface defects of fiber reinforced thermoplastic composite products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The implementation steps of the present embodiment method are as follows:

[0074] 1. Cut the fiberglass plain weave and fiberglass mat according to the size of the car floor mold.

[0075] 2. Put the cut glass fiber plain weave cloth and glass fiber felt in an oven for 3 hours at 120°C.

[0076] 3. Will be as image 3 The surface of the automobile floor mold shown is cleaned and polished smoothly, and the mold release agent is evenly coated on the surface of the mold.

[0077] 4. Lay the cut 6 layers of glass fiber plain weave cloth (referred to as cloth) and 8 layers of glass fiber felt (referred to as mat) in the female mold in the following stacking manner from top to bottom: cloth / felt / cloth / felt / felt / cloth / felt / felt / cloth / felt / felt / cloth / felt / cloth, and as shown in Table 1 below, the unit area grammage of the laminate formed after the lamination of the plain weave cloth and the fiber felt is 4000 ( g / m 2 ).

[0078] 5. Close the female and male molds.

[00...

Embodiment 2

[0089] The implementation steps of the method in this embodiment are the same as in Example 1, except that the glass fiber plain cloth used in step 2 has only 5 layers, and the glass fiber mat has only 4 layers, and is laid on the female mold in the following stacking manner from top to bottom Middle: cloth / felt / cloth / felt / cloth felt / cloth / felt / cloth, as shown in Table 1, the weight per unit area of ​​the laminate formed after the lamination of the plain weave cloth and the fiber felt is 2800 (g / m 2 ); the mold of step 1 and 3 is the automobile trunk lid mould; the product that step 10 obtains is as follows Figure 6 car trunk lid products.

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Abstract

The invention relates to a method capable of reducing the surface defects of fiber reinforced thermoplastic composite products, a fiber reinforced thermoplastic composite material formed by the method and products made by the composite material. The method comprises the following steps of: (1) providing a mold with a female mold and a male mold which are matched with each other; (b) laying more than one layer of fiber woven fabric and more than one layer of elastic fiber on the mold in a stacked way, or laying a stacked body containing more than one layer of the fiber woven fabric and more than one layer of the elastic fiber on the mold, wherein the elastic fiber products are one or more than two kinds of fabrics selected from fiber felts and three-dimensional fiber woven fabrics; (c) matching the female mold with the male mold and heating the mold; (d) injecting a thermoplastic resin composite into the mold; and (e) demolding the thermoplastic resin composite injected mold to obtain the products after the thermoplastic resin composite is solidified and the mold is cooled. The appearance of the obtained products does not have obvious dry spots or cracks.

Description

technical field [0001] The invention belongs to the field of thermoplastic resin-based composite materials, and in particular relates to a method for reducing surface defects of fiber-reinforced thermoplastic composite material products. The invention also relates to a fiber-reinforced thermoplastic composite material obtained by said method and an article made of said composite material. Background technique [0002] Compared with thermosetting resin-based composite materials, thermoplastic resin-based composite materials have better impact resistance, shorter processing cycle, easy recycling, good weldability and chemical corrosion resistance, etc. It is widely used in aerospace, automobile, chemical industry, electronics, electrical appliances and other fields. [0003] In recent years, thermoplastic resin-based composite systems suitable for resin transfer molding (RTM) molding have been developed. For example, at the 18th China International Composites Exhibition, the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C70/08
Inventor 于丽萍范欣愉颜春李红周张笑晴祝颖丹
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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