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Manufacturing process for high performance lignocellulosic fibre composite materials

A technology of lignocellulose and composite materials, which is applied in the field of lignocellulose fiber/thermoplastic composition with material characteristics, can solve the problems of easy breakage of glass fibers, hinder the utilization of the potential of composite materials, etc., and achieve the effect of weight reduction

Inactive Publication Date: 2009-02-11
莫海尼 M 塞恩 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Glass fibers tend to break into small lengths, and this will negatively prevent the utilization of the full potential of the composite

Method used

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  • Manufacturing process for high performance lignocellulosic fibre composite materials
  • Manufacturing process for high performance lignocellulosic fibre composite materials
  • Manufacturing process for high performance lignocellulosic fibre composite materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0084] The following examples illustrate some moldable thermoplastic compositions and composite products containing lignocellulosic fibers within the scope of the present invention and methods for their preparation. These are merely illustrative examples, and variations and modifications of the invention may be made by those skilled in the art without departing from the scope of the invention.

[0085] Properties of polypropylene

[0086] The properties of polypropylene are shown in Table 1 for comparison purposes.

[0087] ASTM test Properties ASTM D638 Tensile strength, MPa 31.6 ASTM D638 Tensile modulus, GPa 1.21 ASTM D790 Bending strength, MPa 50 ASTM D790 Flexural modulus, GPa 1.41

[0088] Table 1. Properties of polyolefins

[0089] thermoplastic composition

[0090] Examples of compositions of moldable thermoplastic compositions are given in Table 2. The pulp fibers are defibrillated in a high shear internal mixer fo...

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Abstract

The present invention relates to a process for the manufacture of composite materials having lignocellulosic fibres dispersed in a thermoplastic matrix, while generally maintaining an average fibre length not below 0.2 mm. The process comprises defibrillation of the lignocellulosic fibres using a mixer and at a temperature less than the decomposition temperature of the fibres in order to separate the fibres and generate microfibres, followed by dispersion of the fibres in the thermoplastic matrix by mechanical mixing to get the moldable thermoplastic composition, followed by injection, compression, extrusion or compression injection molding of said composition. The process produces high performance composite materials having a tensile strength not less than about 55 MPa, a flexural strength not less than about 80 MPa, a stiffness not less than about 2 GPa, notched impact strength not less than about 20 J / m, and un-notched impact strength not less than about 100 J / m. The composite materials of the present invention are well-suited for use in automotive, aerospace, electronic, furniture, sports articles, upholstery and other structural applications.

Description

field of invention [0001] The present invention generally relates to lignocellulosic fiber / thermoplastic composites. The present invention more particularly relates to methods of producing lignocellulosic fiber / thermoplastic compositions with improved material characteristics. Background of the invention [0002] Lignocellulosic fiber composites are widely used in a broad spectrum of structural and non-structural applications, including automotive, electronics, aerospace, architectural and structural, furniture, sporting goods, and the like. This is due to the advantages offered by natural fibers over conventional inorganic fillers, including: [0003] - Vegetable fibers have a relatively low density compared to inorganic fillers; [0004] - plant fibers lead to reduced wear on processing equipment; [0005] - Plant fibers have health and environment-related advantages; [0006] - plant fibers are renewable resources and their availability is largely unlimited; [0007]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/92B27N1/00B29C70/12B32B21/08D21B1/34
CPCC08L101/00B29B7/92B29C47/1009B27N1/00C08J5/045B29C2947/92866B29C2947/926C08J5/06D21B1/342B29C48/286B29C2948/926B29C2948/92866C08L2666/26C08K7/02C08L97/02C08J5/04
Inventor 莫海尼·M·塞恩苏哈拉·潘塔普拉卡尔刘常福
Owner 莫海尼 M 塞恩
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