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Acoustic emission reduction of composites containing semi-aromatic polyamides

A polyamide composition and composite structure technology, applied in the field of semi-aromatic polyamide composite structure and its preparation, can solve the problems of premature aging composite structure deterioration with use and time, reducing mechanical properties and the like

Inactive Publication Date: 2017-08-18
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Microcracks can lead to reduced mechanical properties, premature aging and problems related to composite structure degradation with use and time

Method used

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  • Acoustic emission reduction of composites containing semi-aromatic polyamides
  • Acoustic emission reduction of composites containing semi-aromatic polyamides
  • Acoustic emission reduction of composites containing semi-aromatic polyamides

Examples

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Embodiment

[0083] Material

[0084] The following materials were included in the compositions used in Examples and Comparative Examples herein.

[0085] The matrix resin composition and / or the surface resin composition contain up to 6 weight percent of heat stabilizers, antioxidants and metal deactivators as required by the manufacturing process and as is well known to those skilled in the art.

[0086] Base resin composition and surface resin composition

[0087] Resin composition 1 (PA66 PA6) : is a polyamide resin comprising adipic acid and 1,6-hexanediamine (having a native polymer weight average molecular weight of about 20000-35000 Daltons, commercially available as PA66 from E.I. du Pont de Nemoursand Company), Blends with a polyamide resin made from ε-caprolactam (having a melting point of about 220°C, known as PA6 and commercially available from eg BASF corporation). The weight ratio of the blend is 75:25 or 50:50.

[0088] Resin composition 2 (PA66) : is a polyamide ...

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Abstract

The present invention relates to a composite structure having a surface, which surface has at least a portion made of a surface resin composition, and comprising a woven glass fiber fabric, said woven glass fiber fabric being fully impregnated with a matrix resin composition, wherein a. the matrix resin composition comprises a blend of PA6T / DT and PA66 / 6T, preferably with a weight ratio between from about 30:70 to about 70:30, more preferably with a weight ratio of about 50:50 b. the surface resin composition is independently selected from an amorphous polyamide composition comprising PA6I / 6T or a polyamide composition comprising a blend of PA66 and PA6, preferably the weight ratio of PA66 and PA6 in the blend of the surface resin composition is of between 100:0 to 50:50, more preferably 75:25 and wherein c. the woven glass fiber fabric has a basis weight of between 280 to 320 g / m2 d. the coverage of the woven glass fiber fabric is of between 95% to 100%.

Description

technical field [0001] The present invention relates to the field of semiaromatic polyamide composite structures and methods for their preparation. Background technique [0002] To replace metal components to reduce weight and cost while maintaining comparable or superior mechanical properties, structures based on composite materials having a polymer matrix comprising fibrous material have been 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, thereby optimizing the properties of composite structures. [0003] In highly demanding applications, such as structural parts in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/02B32B27/12B32B27/18B32B27/34C08J5/04C08J7/04C08L77/02C08L77/06D03D1/00D03D13/00D03D15/00
CPCB32B5/024B32B27/12B32B27/18B32B27/34C08J5/043C08L77/02C08L77/06D03D1/00D03D13/008B32B2260/021B32B2260/046B32B2307/306B32B2307/50B32B2307/558B32B2307/714B32B2262/10B32B2262/106B32B2270/00B32B2605/00B32B2419/00B32B2457/00B32B2457/12B32B2509/00C08J2477/06C08J2377/06C08L2205/03C08L2205/02D10B2505/02D10B2101/06C08J7/0427D03D15/267C08J5/247C08J5/249C08J5/244B29C70/506B32B2262/101D06M2101/40D06M15/59C03C25/328C03C25/1095
Inventor M.D.瓦科曼S.原B.B.索尔
Owner EI DU PONT DE NEMOURS & CO