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Preparation method of scratch-resistant polypropylene injection molding part

A technology of polypropylene and injection molded parts, which is applied in the field of materials to achieve the effects of saving production costs, less additives, and stable scratch resistance

Active Publication Date: 2020-02-25
成都产品质量检验研究院有限责任公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above methods are difficult to ensure that the mechanical properties of polypropylene materials are not affected

Method used

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  • Preparation method of scratch-resistant polypropylene injection molding part
  • Preparation method of scratch-resistant polypropylene injection molding part
  • Preparation method of scratch-resistant polypropylene injection molding part

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1. Mix 0.1 part of TMB-5 type β nucleating agent with 100 parts of homopolypropylene and 1 part of ethanolamine or mix 0.5 part of TMB-5 type β nucleating agent with 100 parts of homopolypropylene and 1 part of ethanolamine Mix to obtain the mixture, then put the mixture in the extrusion device, the temperature of the melting section of the extruder is 190°C, the temperature of the die is 210°C, after cooling and granulating, place it in a vacuum drying oven for 4 hours at 120°C, and finally carry out For melt injection molding, the melting temperature is controlled at 190 ° C, the injection pressure is 30 MPa, and the injection speed is 80 mm / s. After cooling under pressure, a standard sample bar with a length of 100 mm, a width of 10 mm, and a thickness of 4 mm is obtained.

[0030] The comparison sample is: directly place homopolypropylene in the extrusion device, the temperature of the melting section of the extruder is 190°C, the temperature of the die is...

Embodiment 2

[0032] Example 2, 0.1 part of TMB-5 type β nucleating agent is mixed with 100 parts of homopolypropylene and 1 part of ethanolamine or 0.5 part of TMB-5 type β nucleating agent is mixed with 100 parts of homopolypropylene and 1 part of ethanolamine Mix to obtain the mixture, then put the mixture in the extrusion device, the temperature of the melting section of the extruder is 190°C, the temperature of the die is 210°C, after cooling and granulating, place it in a vacuum drying oven for 4 hours at 120°C, and finally carry out For melt injection molding, the melting temperature is controlled at 270°C, the injection pressure is 30MPa, and the injection speed is 80mm / s. After cooling under pressure, a standard sample bar with a length of 100mm, a width of 10mm, and a thickness of 4mm is obtained.

[0033] The comparison sample is: directly place homopolypropylene in the extrusion device, the temperature of the melting section of the extruder is 190°C, the temperature of the die is...

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PUM

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Abstract

The invention discloses a preparation method of a scratch-resistant polypropylene injection molding part. The preparation method comprises the following steps of S1, mixing and sufficiently stirring 100 parts of polypropylene, 0.01-3 parts of a beta nucleating agent and 0.1-3 parts of a polar additive to obtain a mixture; S2, placing the mixture in a double-screw extrusion device for melt extrusion to obtain a polypropylene composite material; S3, cooling and granulating a polypropylene composite material and placing the polypropylene composite material in a vacuum drying box for drying for 4h; S4, placing the dried polypropylene composite material in an injection forming machine for injection molding processing to obtain a polypropylene blank; and S5, carrying out pressure maintaining andcooling operation on the polypropylene blank to obtain the scratch-resistant polypropylene injection molding part.

Description

technical field [0001] The invention relates to the field of materials, in particular to a method for preparing a scratch-resistant polypropylene injection molded part. Background technique [0002] Polypropylene material has excellent comprehensive properties and has been widely used in packaging engineering, automobile industry, electronic and electrical products and other fields. Due to the poor scratch resistance of the surface of the polypropylene material, when it is scratched by a sharp object, it is easy to form scratches, which will affect the appearance of the product. [0003] The performance of a polymer is not only related to its chemical structure, but also depends on its processing and shape. For this reason, domestic and foreign academia and industry have conducted a lot of research on improving the scratching performance of polypropylene, but they mainly focus on improving the scratching performance of polypropylene by adding additives. rub performance. H...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/00B29B9/06C08L23/12C08K5/17
CPCB29B9/06B29C45/0001B29C45/0053C08K5/17C08L23/12
Inventor 张晓飞马俊辉周晓群叶元明
Owner 成都产品质量检验研究院有限责任公司
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