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Tool prepreg for composite material mold, preparation method, application method and application

A composite material and application method technology, applied in the field of tooling prepreg of composite material mold, can solve the problems of complex curing process, high curing temperature, slow progress, etc., and achieve the effect of simplifying curing process, low specific gravity and good viscosity

Pending Publication Date: 2021-02-26
WEIHAI GUANGWEI COMPOSITES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In recent years, tooling prepregs at home and abroad have begun to develop but the progress is slow. They all adopt wet prepreg production processes, and there are common problems such as high curing temperature, poor temperature resistance, and complicated curing process, which limit its application range. These problems affect the development of tooling prepregs. It is of great significance to study a hot-melt tooling prepreg with low initial curing temperature, good heat resistance after curing, and high dimensional stability.

Method used

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  • Tool prepreg for composite material mold, preparation method, application method and application
  • Tool prepreg for composite material mold, preparation method, application method and application
  • Tool prepreg for composite material mold, preparation method, application method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 101

[0046] In this example, mix the resin component A and the curing agent B component uniformly to obtain SZ01 (satisfied that the viscosity at 50°C is 10Pa.s, and the gel time at 120°C is 7min), wherein the resin Component A of the mixture (with a viscosity of 10Pa.s at 50°C) accounts for 95% of the total mass of the resin, and the balance of component B of the curing agent mixture (with a viscosity of 0.1Pa.s at 25°C) (including negligible impurities, etc.). Component A of the resin mixture is bisphenol F epoxy resin (epoxy equivalent 182-195g / mol). Component B of the curing agent mixture is dicyandiamide. Then use the hot-melt method to impregnate the reinforcement material according to the corresponding process parameters. The reinforcement material is made of acrylic fiber and polypropylene fiber (each single twisted pair) fabric with a diameter of 0.1mm. After the mixture is stacked, the hot-melt prepreg temperature is 30 ℃ , to prepare the prepreg. The preparation in th...

Embodiment 102

[0058] In this example, mix resin component A and curing agent B component uniformly to obtain SZ02 (satisfied with a viscosity of 20 Pa.s at a temperature of 50°C and a gel time of 8 minutes at a temperature of 120°C), wherein the resin Component A of the mixture (with a viscosity of 20Pa.s at a temperature of 50°C) accounts for 96% of the total mass of the resin, and the balance of component B of the curing agent mixture (with a viscosity of 0.2Pa.s at a temperature of 25°C) (including negligible impurities, etc.). Component A of the resin mixture is a novolak type epoxy resin (epoxy equivalent 172-182g / mol). Curing agent mixture component B is polyamide. Then use the hot-melt method to impregnate the reinforcing material according to the corresponding process parameters. The reinforcing material is made of vinylon fiber and polyvinyl chloride fiber fabric with a diameter of 0.3mm (the three strands of each wire are formed into a thread and then woven), and the mixture is s...

Embodiment 103

[0070] In this example, mix the resin component A and the curing agent B component uniformly to obtain SZ03 (satisfied that the viscosity at 50°C is 30Pa.s, and the gel time at 120°C is 10min), wherein the resin Component A of the mixture (with a viscosity of 25Pa.s at 50°C) accounts for 97% of the total mass of the resin, and the balance of component B of the curing agent mixture (with a viscosity of 0.4Pa.s at 25°C) (including negligible impurities, etc.). Component A of the resin mixture is glycidylamine epoxy resin (epoxy equivalent 192-198g / mol). Component B of the curing agent mixture is ethylenediamine. Then use the hot-melt method to impregnate the reinforcing material according to the corresponding process parameters. The reinforcing material is a glue-dipped fiber fabric with a diameter of 0..5mm.

[0071] The performance test laminate and composite material mold preparation methods are as follows:

[0072] S21. Performance test laminated board According to the re...

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Abstract

The invention discloses a tool prepreg for a composite material mold, a preparation method, an application method and application. The prepreg comprises a fiber material and a resin material, the resin material comprises a component A accounting for 95%-99% of the total mass of resin and the balance of a component B, the component A is matrix resin, and the viscosity at the temperature of 50 DEG Cis 10-30 Pa.s; the component B is a curing agent, and the viscosity at the temperature of 25 DEG C is 0.1-0.5 Pa.s; in addition, the resin material satisfies the following conditions: the viscosity at 50 DEG C is 10-30 Pa.s, and the gelation time at 120 DEG C is 7-10 min. The prepreg provided by the scheme of the invention is good in viscosity and good in manufacturability; the composite materialcan be pre-cured under the low-temperature condition of room temperature to 60 DEG C, and the glass-transition temperature (DMA) of the post-cured composite material is greater than 200 DEG C; and the composite material has excellent dimensional stability.

Description

technical field [0001] The invention belongs to the technical field of prepreg composite materials, and in particular relates to a tooling prepreg used for composite material moulds, a preparation method, an application method and application. Background technique [0002] At present, the mold materials suitable for molding composite parts mainly include: traditional metal materials (such as steel, aluminum, etc.), new metal materials Invar, and fiber-reinforced composite materials. Traditional metal materials have the advantages of low material price, relatively simple processing, and long service life, and are widely used. However, their long manufacturing cycle, heavy weight, and high difficulty in manufacturing complex profiles are not conducive to the production of small batch products, especially metal molds. It does not match the thermal expansion coefficient of composite parts, which makes it difficult to improve the manufacturing accuracy of parts. Although the the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08L63/04C08L63/00C08L71/12C08L61/34C08L79/08C08L67/00C08J5/24
CPCC08J5/24C08J2363/02C08J2363/04C08J2363/00C08J2371/12C08J2361/34C08J2379/08C08J2367/00C08J2463/04C08J2463/00C08J2471/12C08J2461/34C08J2479/08C08J2467/00C08J2463/02
Inventor 曾秋云林凤森张俊强李盛林
Owner WEIHAI GUANGWEI COMPOSITES
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