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Composite laminate with improved shock strength, as well as preparation method and use thereof

A technology of impact strength and composite layer, which is applied in the direction of chemical instruments and methods, synthetic resin layered products, applications, etc., can solve the problems of constant thickness and weight, and achieve the effect of improving impact strength

Active Publication Date: 2013-04-17
DUPONT SAFETY & CONSTR INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the current prior art literature, although people have used such as glass fiber, graphite fiber, para-aramid fiber, etc. mixed with carbon fiber reinforced polymer materials, a composite material that can ideally improve its resistance has not been found. impact strength while keeping the thickness and weight of the material substantially unchanged

Method used

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  • Composite laminate with improved shock strength, as well as preparation method and use thereof
  • Composite laminate with improved shock strength, as well as preparation method and use thereof
  • Composite laminate with improved shock strength, as well as preparation method and use thereof

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preparation example Construction

[0087] The present invention also provides a method of making a composite laminate having improved impact strength, said method comprising:

[0088] (i) provide multi-layer carbon fiber fabric layer (a) and multi-layer non-woven thin felt (b), wherein said carbon fiber fabric is woven two-way cloth or unidirectional cloth, and said non-woven thin felt is made of para-aromatic Composition of family polyamide;

[0089] (ii) impregnating said carbon fiber fabric layer (a) with impregnating epoxy resin system to obtain impregnated carbon fiber fabric layer (A);

[0090] (iii) placing at least one impregnated carbon fiber fabric layer (A) as the first outer surface layer;

[0091] (iv) placing at least one layer of non-woven thin mat (b) and at least one layer of impregnated carbon fiber fabric (A) in an alternating manner until the composite laminate has a total thickness of 0.5-30mm and its second outer surface The facing layer is also an impregnated carbon fiber fabric layer (...

Embodiment

[0105] The present invention is further described below in the form of examples, but the materials, methods and examples of the present invention are only illustrative, not restrictive.

[0106] Material:

[0107] a) Unidirectional carbon fiber cloth prepreg

[0108] Purchased from Wuxi Tianniao Composite Material Company, the weight per unit area is 185g / m 2 , containing 120g / m 2 Carbon fiber unidirectional cloth, the bulk density of the carbon fiber cloth is 1.80g / cm 3 , with a thickness of 0.067mm and impregnated with an epoxy resin system. The recommended curing conditions for this prepreg are: 130°C, over 30 minutes;

[0109] b) Non-woven thin mat of para-aramid

[0110] use Staple fibers, chemically prepared into non-woven thin mats, with a weight per unit area of ​​15 g / m 2 , the bulk density of the non-woven felt is 1.44g / cm 3 , the thickness is 0.01mm.

[0111] c) Nylon non-woven thin felt

[0112] Nylon short fibers (Wuxi Belt Tape Co., Ltd.) are used to p...

Embodiment 1

[0118] Example 1: Preparation of Composite Laminates of the Invention

[0119] Set the weight per unit area to 185g / m 2 The unidirectional carbon fiber cloth prepreg is cut into a sheet of 300mm×300mm; at the same time, the weight per unit area is 15g / m 2 of The non-woven thin mat is also cut into a sheet of 300mm×300mm; first place a layer of prepreg (that is, the impregnated carbon fiber fabric layer) as the first outer surface layer, and place a layer of non-woven thin mat and One ply of prepreg such that between every two plies of prepreg there is a layer Non-woven thin mat, in which the prepreg sheets are stacked in the same fiber direction (warp direction), so that 12 layers of prepreg sheets and 11 layers are shared Non-woven thin mats were prepared together by A composite laminate preform composed of non-woven thin mat and carbon fiber reinforced polymer, the preform is placed on a flat aluminum mold, and then the mold is transferred to a hot press that has bee...

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Abstract

The invention provides a composite laminate with improved shock strength. The composite laminate comprises (a) multi layers of carbon fiber fabric layers, wherein the carbon fiber fabric is a woven bidirectional cloth or unidirectional cloth; (b) multi layers of non-woven thin felts, wherein the non-woven thin felt is composed of para-aromatic polyamide; and (c) a cured epoxy resin, wherein the cured epoxy resin is formed by solidifying an epoxy resin system for impregnation which is impregnated in the carbon fiber fabric layer (a), and at least one layer of the non-woven thin felt (b) is sandwiched between the two layers of the carbon fiber fabric layers, and the two outer surface layers of the composite laminate are carbon fiber fabric layers (a). The invention also provides a method for preparing the composite laminate with improved shock strength, and use of the composite laminate for preparing products or parts of sports equipment and transport tools.

Description

technical field [0001] The present invention relates to composites of carbon fiber reinforced polymers, and more particularly to composite laminates of carbon fiber reinforced polymers with improved impact strength, methods of making and uses thereof. Background technique [0002] Carbon fiber reinforced polymer (CFRP), which is composed of high-strength and high-modulus carbon fiber and epoxy resin matrix, has very high specific strength and specific modulus, good thermal stability, and corrosion resistance, so it is widely used It is used as a structural component material in transportation, sports equipment, or other fields that require light weight and high strength. With the increasing need to reduce energy consumption, especially in the field of transportation, it is becoming more and more common to use carbon fiber reinforced polymer materials to replace metal materials as component materials for light vehicles, high-speed trains, and commercial aircraft. In a societ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/04B32B27/02B32B27/08B32B27/12B32B27/34B32B27/38B32B37/06B32B37/10
CPCB32B5/022B32B5/024B32B5/10B32B5/12B32B5/28B29C70/083B29C70/226B32B2250/03B32B2250/40B32B2250/42B32B2260/021B32B2260/023B32B2260/046B32B2262/0269B32B2262/106B32B2307/558B32B2605/00B32B2605/08B32B2605/10B32B2605/12B32B2605/18B29L2031/52B29L2031/30B32B2305/18B32B2305/20B32B2307/546Y10T156/10Y10T428/24942Y10T442/3309B32B5/26
Inventor 王勇沈海华马永超
Owner DUPONT SAFETY & CONSTR INC
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