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Method for enhancing surface abrasion resistance of liquid molding composite material

A technology for liquid forming and composite materials, applied in chemical instruments and methods, synthetic resin layered products, lamination, etc., can solve coating peeling, increase the manufacturing cost of composite structural parts, and interface between surface coatings and composite materials. Weak ability and other problems, to achieve the effect of improving the wear resistance of the surface

Active Publication Date: 2014-02-26
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, surface coating increases the post-treatment process of composite materials and increases the manufacturing cost of composite structural parts; second, the interface bonding ability between surface coating and composite materials is weak, and coating is prone to occur during use. Peeling; Third, if the inorganic wear-resistant filler is directly added to the liquid molding resin matrix, the viscosity of the matrix resin will be greatly increased, which is in contradiction with the low viscosity of the resin required by the liquid molding process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Using benzoxazine resin as matrix resin and high-strength glass fiber satin fabric SW280 as reinforcement, the wear-resistant layer prepreg was prepared by hot-melt method, and the mass fraction of benzoxazine resin was about 40%. Prepolymerize the wear-resistant layer prepreg at 140°C for 3 hours, cool to room temperature, and lay the prepolymerized wear-resistant layer prepreg on the dry carbon fiber preform according to the layering method of [45 / -45]. On the surface of the body, the fiber preform is made of domestic carbon fiber unidirectional lay-up fabric U3160 and laid according to the prescribed laying method. According to the requirements of the liquid molding process, inject a typical aviation high-temperature epoxy resin 5284RTM, and heat up and solidify after the preform is completely infiltrated. Wherein, the injection process parameters and the curing process parameters are the same as the process parameters of the selected resin. After curing, cool to ro...

Embodiment 2

[0024] Using benzoxazine resin as matrix resin and alkali-free glass fiber twill fabric EW250 as reinforcement, the wear-resistant layer prepreg was prepared by hot-melt method, and the resin mass fraction was about 45%. Prepolymerize the wear-resistant layer prepreg at 130°C for 4 hours, cool to room temperature, and lay the prepolymerized layer of wear-resistant prepreg on the surface of the dry carbon fiber preform. The fiber preform is made of domestic carbon fiber The twill fabric CF3031 is laid according to the prescribed laying method. According to the requirements of the liquid molding process, inject typical high-temperature epoxy resin 5284RTM for aviation until the preform is completely infiltrated, and the temperature rises and solidifies. Wherein, the injection process parameters and the curing process parameters are the same as the process parameters of the selected resin. After curing, cool to room temperature and demould. The wear-resistant layer prepreg and ...

Embodiment 3

[0026] Using polyetheretherketone resin as the matrix resin and carbon fiber plain fabric CF3011 as the reinforcing material, the thermoplastic wear-resistant layer prepreg was prepared by electrostatic powder process, and the resin mass fraction was about 40%. A layer of thermoplastic resin wear-resistant layer prepreg is laid on the surface of the dry carbon fiber preform, and the fiber preform is made of domestic carbon fiber satin fabric CF3031 and laid according to the specified layup method. According to the requirements of the liquid molding process, inject typical aviation high-temperature epoxy resin 6421RTM, until the preform is completely infiltrated, and the temperature rises and solidifies. Wherein, the injection process parameters and the curing process parameters are the same as the process parameters of the selected resin. After curing, cool to room temperature and demould. The wear-resistant layer prepreg and the dry carbon fiber preform are co-cured under th...

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PUM

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Abstract

The invention belongs to liquid molding resin-base composite material surface abrasion resistance technology, and relates to a method for enhancing surface abrasion resistance by preforming an abrasion-resistant layer on a liquid molding composite material surface. The method comprises the following steps: preparing an abrasion-resistant layer prepreg from an abrasion-resistant resin matrix and reinforcing fibers or fabric thereof, carrying out prepolymerization on the abrasion-resistant layer prepreg at 100-150 DEG C, directly attaching the prepolymerized prepreg onto a dry fiber preformed body surface, and carrying out co-curing and molding with the dry fiber preformed body by a liquid molding technique. The resin matrix used by the abrasion-resistant composite material can be structurally compatible with the present typical liquid molding matrix resin for aviation on the molecular level, and participates into the curing reaction of the resin; and the heat resistance, mechanical properties and molding processibility of the original matrix resin and composite material thereof can not be influenced.

Description

technical field [0001] The invention belongs to the research on the surface wear resistance of liquid forming resin-based composite materials, and relates to a method for improving the surface wear resistance of liquid forming composite materials by prefabricating a wear-resistant layer on the surface. Background technique [0002] In the molding process of composite materials, the liquid molding process includes resin transfer molding (RTM) molding process, resin film infiltration (RFI) molding process and vacuum assisted resin infiltration (VARI) molding process, which is a new development in recent years. A new type of high-performance and low-cost manufacturing molding process for composite materials. For example, as far as the RTM molding process is concerned, its process characteristics of mold-to-mold molding improve the dimensional control, stability and surface roughness of composite parts, and can realize the integrated manufacturing of composite parts with complex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/00C08J5/24C08L63/00C08L79/04C08L79/08C08L67/06C08L77/00C08K7/14C08K7/06C08K7/10B32B37/00B32B27/04B32B27/12
Inventor 包建文刘刚李晔刘青曼张连旺钟翔屿
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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