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A thermoplastic fiber composite material sheet, its preparation method and application products

A thermoplastic fiber and composite material technology, applied in the field of composite material sheet and its preparation, can solve the problems of difficult to achieve efficient, stable and mass production of thermoplastic fiber composite materials, solvent recycling, environmental pollution, human safety, etc., and achieve improved interface performance. , the effect of reducing viscosity and increasing interfacial adhesion

Active Publication Date: 2019-07-05
北京蓝星清洗有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this method: solvent recovery, environmental pollution and human safety issues
[0005] At the same time, with the development of the automobile industry and rail transit, the demand for thermoplastic fiber composite materials is increasing, and it is difficult to achieve efficient, stable and mass production of thermoplastic fiber composite materials by traditional molding processes

Method used

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  • A thermoplastic fiber composite material sheet, its preparation method and application products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032]A thermoplastic fiber composite material sheet, comprising the following components: 20wt% carbon fiber twill cloth, 30wt% liquid interface agent, 50wt% polyamide resin. The specific preparation process is: 1) uniformly mixing methyl acrylate and vinyl triethoxysilane with a weight ratio of 9:1 to make a liquid interface agent; A layer of carbon fiber twill cloth is evenly coated on the upper and lower surfaces; 3) the above polyamide resin is mixed with the remaining liquid interface agent to make it uniformly dispersed and dissolved to obtain a polyamide resin matrix solution; 4) in high pressure resin transfer molding (HP- In the mold of RTM) equipment, lay flat and stack 5 layers of carbon fiber plain weave; 5) polyamide resin matrix solution is injected into mold by high pressure resin transfer molding (HP-RTM) equipment and evenly coated, impregnated carbon fiber twill Fiber-reinforced layer; 6) Seal the mold and its periphery, control the mold pressure to 5,000kN,...

Embodiment 2

[0034] A thermoplastic fiber composite material sheet, comprising the following components: 45wt% fiber reinforced layer (25wt% carbon fiber unidirectional cloth and 20wt% aramid fiber unidirectional cloth), 20wt% liquid interface agent, 35wt% polyimide resin. The specific preparation process is: 1) uniformly mixing ethyl acrylate, γ-aminopropyltriethoxysilane and butanediol diglycidyl ether in a weight ratio of 2:1:1 to make a liquid interface agent; 2) Use a liquid interface agent with a total amount of 5wt% of the ingredients to uniformly coat the upper and lower surfaces of each layer of carbon fiber unidirectional cloth and aramid fiber unidirectional cloth; 3) mix the above-mentioned polyimide resin with the remaining liquid interface agent , make it evenly disperse and dissolve, and make the polyimide resin matrix solution; 4) in the mold of high-pressure resin transfer molding (HP-RTM) equipment, lay alternately and stack and lay described carbon fiber unidirectional c...

Embodiment 3

[0036] A thermoplastic fiber composite material sheet comprises the following components: 40wt% carbon fiber / aramid fiber mixed plain weave cloth, 30wt% liquid interface agent, and 30wt% polystyrene resin. The specific preparation process is: 1) uniformly mix 2-methyl methacrylate, γ-glycidyl etheroxypropyl trimethoxysilane and butyl glycidyl ether with a weight ratio of 7:1.5:1.5 to form a liquid interface 2) uniformly coat the upper and lower surfaces of each layer of carbon fiber / aramid fiber hybrid plain weave with a liquid interface agent of 5wt% of the total amount of the composition; 3) mix the polystyrene resin with the remaining liquid interface agent, Make it uniformly dispersed and dissolved to obtain a polystyrene resin matrix solution; 4) spread and stack 7 layers of the carbon fiber / aramid fiber hybrid plain weave cloth in a mold of a high-pressure resin transfer molding (HP-RTM) device ; 5) the polystyrene resin matrix solution is injected into the mold through ...

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Abstract

The invention relates to a thermoplastic fiber composite sheet-like material, which includes: 10-45% of a fiber reinforcing layer, 20-35% of a liquid interface agent and 25-60% of thermoplastic resin; the liquid interface agent includes a main agent and an additive according to the weight ratio of 9:1-4:6. The main agent is at least one selected from acrylic-type resins, and the additive is at least one selected from silanes and ethers. The thickness of the thermoplastic fiber composite sheet-like material is not limited. The invention also relates to a preparation method and an application of the thermoplastic fiber composite sheet-like material. The thermoplastic fiber composite sheet-like material can be produced through a high-pressure resin transfer moulding (HP-RTM) process, and is suitable for industrial batch production. The composite sheet-like material can be cut and spliced optionally to manufacture pre-shaped bodies in different shapes and sizes, which are suitable for manufacturing and shaping various composite material automobile parts. Even in production of parts in complex shapes, high size accuracy and high production efficiency are achieved.

Description

technical field [0001] The invention relates to a composite material sheet and a preparation method thereof, in particular to a thermoplastic fiber composite sheet, a preparation method and an application product thereof. Background technique [0002] Thermoplastic fiber composites (FRTP) have attracted more and more attention due to their advantages of easy molding, recyclability and short production cycle. Usually, thermoplastic fiber composite materials are prepared by solvent impregnation method, melt impregnation method and the like. [0003] The details are as follows: 1. Solvent impregnation method: This method is to dissolve the thermoplastic resin in a suitable solvent to reduce its viscosity to a certain level, and then use the traditional thermosetting resin impregnation method to impregnate the fiber or fiber ribbon. Disadvantages of this method: solvent recovery, environmental pollution and human safety. 2. Melt impregnation method: This method uses heating to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K9/06C08K7/06C08L77/00C08L81/02C08L25/06C08L79/08
CPCC08K7/06C08K9/04C08K9/06C08L25/06C08L79/08C08L2205/16C08L77/00C08L81/02
Inventor 任建中孟秀青杨刚
Owner 北京蓝星清洗有限公司