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Polyamide composite structures and processes for their preparation field of the invention

A composite structure and composition technology, applied in chemical instruments and methods, synthetic resin layered products, textiles, etc., can solve problems such as poor bond strength, weakened high mechanical properties, and poor bond strength

Inactive Publication Date: 2013-03-27
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When overmolding a resin composition on at least a part of a composite structure, the high mechanical properties of said structure may be impaired, for example in terms of flexural strength, due to poor bond strength between the composite structure and the overmolding resin , the interface breaks first due to poor bond strength, so the flexural strength of the structure is less than that of its components

Method used

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  • Polyamide composite structures and processes for their preparation field of the invention
  • Polyamide composite structures and processes for their preparation field of the invention

Examples

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Embodiment

[0120] The following materials were used to prepare composite structures and overmolded composite structures according to the present invention and comparative examples.

[0121] Material

[0122] The following materials constitute the compositions used in the Examples and Comparative Examples

[0123] Semi-aromatic polyamide (PA1) : Polyamide made of terephthalic acid and 1,6-hexanediamine (HMD) and 2-methylpentamethylenediamine (MPMD) (HM:MPMD=50:50) and having a melting point of about 305-315°C (PA). The semiaromatic polyamides are commercially available from E.I. du Pont de Nemours.

[0124] Overmolding resin composition (C2) : Composition comprising 50% by weight of long glass fibers and comprising semiaromatic PA1. This composition is commercially available from E.I. du Pont de Nemours.

[0125] Functionalized Polyolefins (Ionomers) : Poly(ethylene / n-butyl acrylate / methacrylic acid) (E / n-BA / MAA) is an ionomer with about 70% neutralization of zinc ions. The i...

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Abstract

The present invention relates to composite structures and overmolded structures comprising a fibrous material, a matrix resin composition and a portion of its surface made of a surface resin composition, wherein the surface resin composition is chosen from compositions comprising one or more polyamides and one or more functionalized polyolefins.

Description

technical field [0001] The present invention relates to the field of polyamide composite structures, overmolded composite structures suitable for overmolding over at least a part of their surfaces, an overmolded resin composition, and methods for their preparation. Background technique [0002] In order to replace metal parts to reduce weight and cost while maintaining comparable or superior mechanical properties, structures based on composite materials comprising a polymer matrix comprising fibrous materials were developed. With growing interest in this field, fiber-reinforced plastic composite structures have been designed due to their excellent physical properties resulting from the combination of fiber materials and polymer matrices, and these fiber-reinforced plastic composite structures have been Used in a variety of end use applications. Various fabrication techniques have been developed to improve the impregnation of fibrous materials with polymer matrices to optimi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/14B32B27/34C08L77/00B32B27/12
CPCB32B27/34B32B2605/08B32B27/12C08L51/06B29C45/14786C08L77/00B32B27/04C08L23/0869C08L77/06B29C45/14631B32B5/022B32B5/08B32B27/308B32B27/32B32B2260/021B32B2260/046B32B2262/0269B32B2262/06B32B2262/08B32B2262/101B32B2262/103B32B2262/105B32B2262/106B32B2262/14B32B2307/546B32B2307/732Y10T428/23Y10T428/237Y10T442/2041C08L33/00C08L23/0876B29C45/14
Inventor A.E.艾丽娅
Owner EI DU PONT DE NEMOURS & CO