Preparation method of high-performance prefabricated reinforced fabric for facilitating resin flow

A technology to enhance the flow of fabrics and resins, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of poor porosity and weaken the interlayer fluidity of composite prefabricated structures, so as to improve the permeability As well as the uniformity of penetration, great modification and design freedom, and the effect of shortening the preparation time

Active Publication Date: 2013-09-04
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor porosity of the toughening layer added between the prefabricated fabrics, the interlayer fluidity of the composite prefabricated structure is weakened during liquid molding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] For the preparation method of this type of high-performance prefabricated reinforced fabric that promotes resin flow, it is characterized in that the steps of preparation are as follows:

[0021] (1) Preparation of polymer porous media: 1) Spinning the thermoplastic resin or the mixture of thermosetting resin and thermoplastic resin made of the above polymer porous media according to conventional techniques (solution spinning or melt spinning or electrospinning) High-porosity single-layer polymer porous media woven into fabrics, non-woven fabrics, mesh yarns or felts; or pass through different or identical single-layer polymer porous media prepared by the above 1) at 100°C ~450℃ for 1min~30min, or sewing to low density (sewing density is 30 stitches / m 2 ~500 stitches / m 2 ) multi-layer polymer porous media; the three-dimensional porosity of the polymer porous media prepared by the above method is greater than 50%, and its surface density is 4g / m 2 ~20g / m 2 , and its t...

Embodiment 1

[0027] Preparation of porous carrier medium: Weave commercially available conventional copolyamide (nylon) chemical fibers into hollow plain weave cloth with an areal density of 8.48g / m 2 , Porosity 60%.

[0028] The carbon fiber laminated structure is prepared on a general-purpose NCF preparation device (width about 900mm), [+45° / 0° / 90° / -45°] 3S Placement; the above-mentioned polyamide (nylon) hollow plain weave cloth is placed evenly between layers of unidirectional fiber layers. The surface contact ratio between the hollow plain weave cloth and the carbon fiber layup is about 40%, forming carbon fiber layup and hollow plain weave. Alternating laminated prefabricated structures of cloth.

[0029] The whole fabric is heated until the polyamide hollow plain weave is slightly fused, and pressure is applied appropriately to obtain the planar MESF multifunctional prefabricated reinforcement fabric with multi-layered polyamide hollow plain weave as impregnation and flow promotion...

Embodiment 2

[0033] Preparation of porous carrier medium for chemical fiber thread with setting function: Weave commercially available conventional polyethersulfone (PES) chemical fiber into hollow plain weave according to the method in Example 1, use B-stage cured Shuangma resin as setting agent, dissolve it in After the acetone, the hollow plain weave is soaked and dried to obtain a hollow plain weave preloaded with a sizing agent, with an areal density of 12g / m2 and a porosity of 60%.

[0034] Manual preparation [±45°] 2S Multi-layer unidirectional carbon fiber layup, place the above-mentioned hollow plain weave pre-loaded with a sizing agent evenly between each unidirectional carbon fiber layer, the surface contact ratio of the hollow plain weave and carbon fiber layup is about 40%, forming a carbon fiber layup Alternating laminated prefabricated structure with hollow core jersey.

[0035] The setting of the prefabricated fabric: put the above prefabricated fabric against a right-angl...

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Abstract

The invention belongs to a prefabricating technology of a resin-based composite material, and relates to a novel prefabricated reinforced fabric for a multifunctional composite material, which is used for facilitating interlaminar quick impregnation and flow of resin and has shaping and composite material toughening functions, and a preparation method and an application technology thereof. The invention aims to provide a material preparation technology and an application technology of a functional reinforced fabric with quick diversion, material toughening and shaping functions by using the shaping function of a high molecular porous medium at a prefabricating stage, the function of a flow distributor at a mold filling molding stage, the function of a toughening agent at a curing stage and the like on the basis of the conventional multi-layer and multi-directional warp-knitted reinforced fabric; and by means of the material preparation technology and the application technology, the prefabricating and shaping performance of a liquid molded composite material is enhanced, the impregnating and flowing properties of resin inside the prefabricated fabric is enhanced, the manufacturing quality of a product is improved, the manufacturing cost is improved and the toughness and basic performance of the obtained solid composite material are improved.

Description

technical field [0001] The invention belongs to the prefabrication technology of resin-based composite materials, and relates to a novel method for preparing prefabricated reinforced fabrics for multifunctional composite materials, which promotes rapid impregnation and flow of interlayer resins, and has both shaping and composite material toughening. Background technique [0002] Liquid forming resin transfer molding (RTM, Resin Transfer Molding) and various vacuum-assisted infiltration molding technologies are the mainstream of current low-cost technologies for advanced composite materials, which mainly include Seaman's Composite Resin Infusion Molding (SCRIMP, Seaman's Composite Resin Infusion Molding Process), soft mold resin infiltration molding (RIFT, Resin Infusion under Flexible Tooling) and vacuum-assisted RTM (VARTM, Vacuum Assistant) molding technology, etc. In these vacuum-assisted forming technologies, a layer of flexible flow distribution medium or distributor (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/12
Inventor 益小苏刘刚张尧州刘燕峰胡晓兰安学锋
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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