Structured thermoplastic in composite interleaves

A structured, thermoplastic technology that can be used in lamination, layered products, lamination devices, etc., to solve problems such as poor impact resistance and easy delamination

Inactive Publication Date: 2013-04-03
HEXCEL COMPOSITES SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, while such cured materials have some obvious benefits, it has long been discovered that they can have poor impact resistance and are prone to delamination

Method used

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  • Structured thermoplastic in composite interleaves
  • Structured thermoplastic in composite interleaves
  • Structured thermoplastic in composite interleaves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] Example 1 (prepreg A)

[0087] A 145gsm IM7-12K UD fiber sheet surrounded on two sides by an open structure sheet (4gsm (128D04 from Protecnic, France)) was fabricated. Prepregs were fabricated from this open structure sheet and UD fibers by applying a 36 gsm film of epoxy-based M56 resin (MY721 epoxy resin with dissolved polyethersulfone (available from Huntsman) and methylene dianiline curing agent) and passed through compaction rolls to form a prepreg. The resin content of the resulting prepreg was 32%.

Embodiment 3

[0090] Example 3 (prepreg C)

[0091] Prepregs were made by applying a 36gsm M56 resin film to either side of 134gsm AS7-12K UD fibers and passing over compaction rolls. Subsequently, a 128D04 mat was applied to one side of the prepreg before passing through another set of compaction rolls. The resin content of the prepreg obtained according to the invention was 35%.

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Abstract

One or more layers of structured thermoplastic polymer (14, 16, 24), such as a light weight veil of thermoplastic polymer fibers (14, 16, 24), are located within the interleaf zone of laminates that are composed of fibrous layers and thermosetting resin (12, 22). The thermoplastic veils (14, 16, 24) are used in the interleaf zones as a replacement for thermoplastic toughening particles.

Description

technical field [0001] The present invention relates to prepregs comprising fibers and a thermosetting resin which are stacked to form a laminate and subsequently cured to form a composite material. More specifically, the present invention relates to the use of thermoplastic veil or other lightweight structured thermoplastic materials in laminate interlayers. Background technique [0002] Composite materials have well-documented advantages over traditional construction materials, notably the provision of excellent mechanical properties at very low material densities. As a result, the use of such materials has become increasingly widespread, and their applications range from "industrial" and "sports and leisure" to high-performance aerospace components. [0003] Prepregs comprising layers of fibers impregnated with resins such as epoxy resins are widely used in the manufacture of such composite materials. Typically, several plies of this prepreg are "laid up" as desired, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/24B29C70/08B32B5/00
CPCB32B2260/046B32B2260/023B32B2605/18B32B2307/50B32B2262/10B32B2262/106B32B5/00B32B2250/20D04H13/00B32B5/02B32B37/00B32B5/26B32B2262/0261B29C70/086C08J5/24B32B2250/42B32B7/08B32B33/00B32B37/10C08L63/00C08J2363/00C08J2481/06B32B2260/021C08J5/243C08J5/249C08L81/06C08K7/06Y10T428/269Y10T156/10Y10T442/674
Inventor S.莫蒂默
Owner HEXCEL COMPOSITES SAS
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