A kind of polypropylene composite material that improves the mechanical property of weld line and its preparation method

A technology of composite material and grafted polypropylene is applied in the field of talc reinforced polypropylene material and its preparation. The effect of preventing thermal degradation and preventing brittle fracture

Inactive Publication Date: 2017-06-13
FINE BLEND COMPATILIZER JIANGSU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical solutions published in the above patents are mainly used to solve the technical problems that the existing polypropylene composites are prone to flow marks and affect the appearance, but there is no corresponding record on the mechanical strength of the weld line and the volatilization of organic matter. Therefore, for the complex structure , and there are parts in the weld line area, the technical solution of the above patent cannot meet the technical requirements of preventing the brittle fracture of the weld line and effectively reducing the volatilization of organic compounds

Method used

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  • A kind of polypropylene composite material that improves the mechanical property of weld line and its preparation method
  • A kind of polypropylene composite material that improves the mechanical property of weld line and its preparation method
  • A kind of polypropylene composite material that improves the mechanical property of weld line and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Prepare raw materials according to the following components and parts by weight:

[0037]

[0038]Put the raw materials in the proportion into a high-speed mixer and mix them for 5 minutes, then discharge; then put the mixed raw materials in the main feeding port of the twin-screw extruder, adopt two stages of online vacuum, and melt and extrude through the twin-screw machine to produce pellets to produce polypropylene composites. Wherein, the rotational speed of the twin-screw machine is 500 rpm, the temperature is 220° C., and the vacuum pressure is -0.09 MPa.

Embodiment 2

[0040] Prepare raw materials according to the following components and parts by weight:

[0041]

[0042] Put the raw materials in the proportion into a high-speed mixer and mix them for 5 minutes, then discharge; then put the mixed raw materials in the main feeding port of the twin-screw extruder, adopt two stages of online vacuum, and melt and extrude through the twin-screw machine to produce pellets to produce polypropylene composites. Wherein, the rotational speed of the twin-screw machine is 200 rpm, the temperature is 180° C., and the vacuum pressure is -0.09 MPa.

Embodiment 3

[0044] Prepare raw materials according to the following components and parts by weight:

[0045]

[0046] Put the raw materials in the proportion into a high-speed mixer and mix them for 5 minutes, then discharge; then put the mixed raw materials in the main feeding port of the twin-screw extruder, adopt two stages of online vacuum, and melt and extrude through the twin-screw machine to produce pellets to produce polypropylene composites. Wherein, the rotational speed of the twin-screw machine is 400 rpm, the temperature is 210° C., and the vacuum pressure is -0.09 MPa.

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Abstract

The invention relates to a polypropylene composite material capable of improving mechanical properties of weld lines. The composite material comprises the following components in parts by weight: 26.6-71.8 parts of polypropylene A, 5-10 parts of polypropylene B, 5-10 parts of polypropylene C, 2-10 parts of an elastomer, 10-30 parts of talc powder, 5-10 parts of a mineral, 1-3 parts of a dispersant and 0.2-0.4 part of an antioxidant. A preparation method of the composite material comprises the following steps: preparing polypropylene A, polypropylene B, polypropylene C, the elastomer, talc powder, the mineral, the dispersant and the antioxidant according to the parts by weight, placing in a high-speed mixer and fully mixing to obtain a mixture, placing the mixture in a twin-screw extruder, extruding and granulating and carrying out online vacuum to obtain the polypropylene composite material. Compared with the prior art, the preparation method is simple, wide in sources of raw materials and low in cost and is suitable for mass production; and the prepared polypropylene composite material has the advantages of excellent weld line strength and low volatile characteristics, can replace the existing talc powder reinforcing material and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polypropylene material and a preparation method thereof, in particular to a talc powder-reinforced polypropylene material with low volatility for improving the mechanical properties of weld lines and a preparation method thereof. Background technique [0002] Talc powder reinforced polypropylene material is widely used in automobiles, home appliances and other industries due to its excellent mechanical properties, good dimensional stability, high heat resistance, and low cost. However, due to the layered structure of talcum powder, talcum powder reinforced polypropylene material is easy to produce orientation and arrangement during the injection molding process. Therefore, for parts with more complex structures, especially in the inevitable In the area where the weld line is generated, its mechanical properties will be greatly reduced, or in the area where the material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/10C08L23/12C08L23/20C08L51/06C08K13/02C08K3/34C08K3/26C08K3/30C08K5/134C08K5/526B29C47/92B29C48/92
CPCB29C48/92B29C2948/9259B29C2948/92704C08K2201/003C08K2201/014C08L23/12C08L23/14C08L2205/025C08L2205/035C08L23/20C08L51/06C08K13/04C08K3/34C08K7/18C08K5/1345C08K5/526
Inventor 娄小安路海冰裘浩成沈叶龙
Owner FINE BLEND COMPATILIZER JIANGSU CO LTD
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