Polylactic acid-polypropylene composite material, and preparation method and application thereof

A composite material, polylactic acid technology, applied in the field of polylactic acid-polypropylene composite material and its preparation, can solve the problems of high injection molding temperature, large dimensional change, low tensile strength value, etc., and achieve high tensile strength and stable size , Low odor effect

Inactive Publication Date: 2017-06-23
BAIC MOTOR CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interior and exterior parts of automobiles made of polypropylene materials have some defects such as odor, large dimensional changes, low tensile strength values, and high injection molding temperatures.

Method used

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  • Polylactic acid-polypropylene composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1. Polylactic acid-polypropylene composite material

[0036] The polylactic acid-polypropylene composite material of the present embodiment consists of the following components by weight:

[0037] Polylactic acid (weight average molecular weight: 300,000): 35 parts;

[0038] Polypropylene (weight average molecular weight: 800,000): 60 parts;

[0039] Maleic anhydride: 5 parts.

[0040] 2. Automobile shift cover

[0041] The preparation method of the automobile shift cover plate of the present embodiment is specifically as follows:

[0042] 1. mix

[0043] After each component in the polylactic acid-polypropylene composite material is prepared according to their respective parts by weight, they are uniformly mixed to obtain a mixed material.

[0044] 2. Dry

[0045] The above mixed material was dried at 90° C. for 30 min to obtain a dry raw material.

[0046] 3. Injection molding

[0047] Put the above-mentioned dry raw materials into the cylinder of the injectio...

Embodiment 2

[0050] 1. Polylactic acid-polypropylene composite material

[0051] The polylactic acid-polypropylene composite material of the present embodiment consists of the following components by weight:

[0052] Polylactic acid (weight average molecular weight: 500,000): 25 parts;

[0053] Polypropylene (weight average molecular weight: 600,000): 65 parts;

[0054] Maleic anhydride: 10 parts.

[0055] 2. Automobile shift cover

[0056] The preparation method of the automobile shift cover plate of the present embodiment is specifically as follows:

[0057] 1. mix

[0058] After each component in the polylactic acid-polypropylene composite material is prepared according to their respective parts by weight, they are uniformly mixed to obtain a mixed material.

[0059] 2. Dry

[0060] The above mixed material was dried at 100° C. for 25 min to obtain a dry raw material.

[0061] 3. Injection molding

[0062] The above-mentioned dry raw materials were put into the barrel of an inje...

Embodiment 3

[0065] 1. Polylactic acid-polypropylene composite material

[0066] The polylactic acid-polypropylene composite material of the present embodiment consists of the following components by weight:

[0067] Polylactic acid (weight average molecular weight: 400,000): 25 parts;

[0068] Polypropylene (weight-average molecular weight: 700,000): 70 parts;

[0069] Maleic anhydride: 5 parts.

[0070] 2. Automobile shift cover

[0071] The preparation method of the automobile shift cover plate of the present embodiment is specifically as follows:

[0072] 1. mix

[0073] After each component in the polylactic acid-polypropylene composite material is prepared according to their respective parts by weight, they are uniformly mixed to obtain a mixed material.

[0074] 2. Dry

[0075] The above mixed material was dried at 110° C. for 15 min to obtain a dry raw material.

[0076] 3. Injection molding

[0077] The above dry raw materials were put into the cylinder of an injection moldi...

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Abstract

The invention provides a polylactic acid-polypropylene composite material, and a preparation method and application thereof. The polylactic acid-polypropylene composite material is prepared from the following components in parts by weight: 25 to 40 prats of polylactic acid, 60 to 70 parts of polypropylene and 5 to 10 parts of maleic anhydride. The polylactic acid-polypropylene composite material is low in injection molding temperature and has the advantages of environmental friendliness, environmental protection, low smell, stable size and the like.

Description

technical field [0001] The invention relates to a composite material, in particular to a polylactic acid-polypropylene composite material and its preparation method and application. Background technique [0002] Polypropylene (referred to as PP) is a thermoplastic resin polymerized from propylene. It is widely used because of its advantages such as low relative density, good mechanical properties, heat resistance and electrical insulation. At present, interior and exterior trim parts such as automobile shift cover are usually injection molded from polypropylene, and the injection temperature is about 220°C. However, automotive interior and exterior trims made of polypropylene materials have some defects such as odor, large dimensional changes, low tensile strength values, and high injection molding temperatures. [0003] Polylactic acid (abbreviated as PLA) is a polymer obtained by polymerizing lactic acid as the main raw material. Its production process is pollution-free a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L67/04C08K5/1539B29C45/78B29C45/77
CPCC08L23/12B29C45/77B29C45/78C08L67/04C08K5/1539
Inventor 丁伟良
Owner BAIC MOTOR CORP LTD
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