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Preparation method of fiber reinforced composite material and fiber reinforced composite material

A composite material and fiber-reinforced technology, which is applied in the preparation of fiber-reinforced composite materials and the field of fiber-reinforced composite materials, can solve the problems of fiber-reinforced thermoplastic composite material reinforcement mechanism, microstructure failure mode is not deep enough, etc., to achieve easy demoulding, mechanical properties high effect

Inactive Publication Date: 2017-07-14
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Domestic research on the reinforcement mechanism, microstructure, and failure modes of fiber-reinforced thermoplastic composites is not deep enough

Method used

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  • Preparation method of fiber reinforced composite material and fiber reinforced composite material
  • Preparation method of fiber reinforced composite material and fiber reinforced composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The fiber-reinforced composite material preparation method of this embodiment includes the following steps:

[0026] S1, smear release wax / release agent on the mold in hot press;

[0027] S2. Place one layer of release cloth, at least two layers of fiber prepreg tapes and one layer of release cloth in sequence in the mold;

[0028] S3. Set the process parameters of the hot press and start the hot press. After the mold in the hot press reaches the preset temperature, heat preservation is carried out, and the pressure is maintained at the preset temperature, and finally cooled at the preset cooling rate The fiber reinforced composite material is obtained.

[0029] In this embodiment, the composite molding of the fiber prepreg tape is realized by using a hot press by hot molding, so that the internal structure of the composite material is uniform, the tensile stress distribution is uniform, and the mechanical properties are high; at the same time, in Before hot molding, ...

Embodiment 2

[0035] As a convertible implementation, the difference between this example and Example 1 is that in this example, the preset temperature is set to 200° C., the holding time is set to 7 minutes, and the holding pressure is set to 5MPa, the dwell time is set to 7min, and the preset cooling rate is set to 1°C / min.

[0036] In this embodiment, preferably, the fiberglass-reinforced polypropylene prepreg fabric and / or the carbon fiber-reinforced polypropylene prepreg fabric and / or the aramid fiber-reinforced polypropylene prepreg fabric have a shape of twill 2 / 2.

Embodiment 3

[0038] As a convertible implementation, the difference between this example and Example 1 is that in this example, the preset temperature is set to 160°C, the holding time is set to 10min, and the holding pressure is set to 10MPa, the dwell time is set to 0.5min, and the preset cooling rate is set to 70°C / min.

[0039] In this embodiment, preferably, the fiberglass-reinforced polypropylene prepreg fabric and / or the carbon fiber-reinforced polypropylene prepreg fabric and / or the aramid fiber-reinforced polypropylene prepreg fabric are twill 3 / 3.

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Abstract

The invention discloses a preparation method of a fiber reinforced composite material. The preparation method comprises the following steps: (S1) demolding wax / a demolding agent are coated on a mold in a hot press; (S2) a layer of demolding cloth, at least two layers of fiber reinforced prepreg tapes and a layer of demolding cloth are placed in the mold in sequence; and (S3) process parameters of the hot press are set; the hot pressure is started; and after the mold in the hot press is closed, and a preset temperature is reached, the insulation is performed, the pressure is kept at the preset temperature, and finally, the fiber reinforced composite material is obtained by cooling according to a preset cooling speed. The hot compression molding of the fiber prepreg tapes is realized through the hot press, so that the internal structure of the composite material is uniform, the stretch stress is uniformly distributed, and the mechanical performance is high; and meanwhile, the demolding agent or the demolding wax is brushed on the mold before hot compression molding, and the demolding cloth is paved up and down, so that the formed composite material is liable to demold.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to a method for preparing a fiber-reinforced composite material and the fiber-reinforced composite material. Background technique [0002] The number of automobiles in China is expected to reach 200 million by 2020. Exhaust emissions from automobiles are a major source of air pollution. A 10% weight reduction of fuel vehicles will reduce fuel consumption and CO2 emissions by 7% and 13%, respectively. So it is an inevitable trend to realize the lightweight of automobiles. At present, the automobile body is made of aluminum alloy and high-strength steel. The density of high-strength steel is 7.8g / cm3, the tensile strength is 340-2100MPa, and the specific strength is 0.04-0.27; the density of high-strength aluminum alloy is 2.7g / cm3, and the tensile strength The strength is 144~650MPa, and the specific strength is 0.05~0.23. The density of E-glass fiber in the glass fiber reinforce...

Claims

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Application Information

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IPC IPC(8): B29C70/34C08L23/12C08L77/10C08K7/14C08K7/06C08J5/04
CPCB29C70/345C08J5/042C08J5/043C08J5/046C08J2323/12C08J2477/10C08K7/06C08K7/14C08L23/12C08L2205/16C08L77/10
Inventor 杨旭静方文俊莫富灏韦凯肖志李茂君
Owner HUNAN UNIV