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Polypropylene composite material with good appearance and preparation method thereof

A technology of composite materials and polypropylene, which is applied in the field of polypropylene composite materials and its preparation, can solve the problems of affecting the appearance of parts and increasing tiger skin patterns, etc., and achieve the effects of low cost, enhanced compatibility and excellent mechanical properties

Inactive Publication Date: 2014-03-12
SHANGHAI SUNNY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Studies have shown that the increase of toughening agent will significantly increase the probability of tiger skin pattern, thus affecting the appearance of parts

Method used

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  • Polypropylene composite material with good appearance and preparation method thereof
  • Polypropylene composite material with good appearance and preparation method thereof
  • Polypropylene composite material with good appearance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Prepare raw materials according to the following components and weight percent content:

[0029] Copolymerized polypropylene 62%;

[0030] Ethylene-octene copolymer 15%;

[0031] Ternary copolymerized thermoplastic elastomer 12%;

[0032] Wollastonite 10%;

[0033] Antioxidant 0.6%;

[0034] Lubricant 0.4%;

[0035] Put all the raw materials together into a high-speed mixer and mix for 2-5 minutes, and discharge; then put the mixed material into a twin-screw extruder to extrude and granulate to obtain a polypropylene composite material with good appearance. Wherein, the process temperature is 200° C., and the screw speed is 400 rpm.

Embodiment 2

[0037] Prepare raw materials according to the following components and weight percent content:

[0038] Copolymer polypropylene 70%;

[0039] Ethylene-octene copolymer 8%;

[0040] Ternary copolymerized thermoplastic elastomer 6%;

[0041] Calcium carbonate 15%;

[0042] Antioxidant 0.6%;

[0043] Lubricant 0.4%;

[0044] Put all the raw materials together into a high-speed mixer and mix for 2-5 minutes, and discharge; then put the mixed material into a twin-screw extruder to extrude and granulate to obtain a polypropylene composite material with good appearance. Wherein, the process temperature is 190° C., and the screw speed is 300 rpm.

Embodiment 3

[0046] Prepare raw materials according to the following components and weight percent content:

[0047] Copolymerized polypropylene 65%;

[0048] Ethylene-octene copolymer 9%;

[0049] Ternary copolymerized thermoplastic elastomer 5%;

[0050] Talc powder 20%;

[0051] Antioxidant 0.6%;

[0052] Lubricant 0.4%;

[0053] Put all the raw materials together into a high-speed mixer and mix for 2-5 minutes, and discharge; then put the mixed material into a twin-screw extruder to extrude and granulate to obtain a polypropylene composite material with good appearance. Wherein, the process temperature is 180° C., and the screw speed is 350 rpm.

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Abstract

The invention relates to a polypropylene composite material with good appearance and a preparation method thereof. The preparation method comprises the following steps: (1) weighing the following components by weight percent: 33%-85.6% of polypropylene, 3-20% of flexibilizer, 1-20% of ternary polymerization thermoplastic elastomer, 10-30% of filling mineral, 0.2-1% of antioxygen, and 0.2-1% of lubricant; (2) putting the raw materials of the step (1) into a high-speed mixer and mixing for 2-5 minutes, and discharging; (3) putting the materials mixed in the step (2) into a twin screw extruder and pelleting through extrusion so as to prepare the polypropylene composite material with good appearance, wherein the rotation speed of the twin screw extruder is 200-400 rpm (revolutions per minute), and the temperature is 180-220 DEG C. Compared with the prior art, the polypropylene composite material has good mechanical property, has no defects such as marks and tiger skin left on the surface, is environment-friendly, and can be widely used in the fields of automobiles, household appliances, sports goods and the like.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polypropylene composite material with good appearance and a preparation method thereof. Background technique [0002] Polypropylene is widely used in industries such as automobiles and home appliances due to its low density, corrosion resistance, easy processing, low cost, recyclability, and excellent mechanical properties. However, polypropylene has poor low temperature resistance, low rigidity, and is easy to age. It is usually necessary to add tougheners, fillers, and additives to optimize its performance. Due to the large difference in viscosity between the components during the injection molding process, defects such as flow marks and tiger skin patterns often appear on parts with large processes. Studies have shown that the increase of toughening agent will significantly increase the probability of tiger skin pattern, thus affecting the appearance of the workpiece. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/12C08L23/08C08K13/02C08K3/34C08K3/26C08K7/20C08K3/30C08K5/134C08K5/526C08K5/098B29B9/06B29C47/92B29C48/92
CPCB29B9/06B29C48/92B29C2948/9258B29C2948/92704C08L23/12C08L23/14C08L2205/025C08L2205/03C08L2205/035C08L2205/08C08L2207/04C08L23/0815C08K3/34C08K2003/265C08K7/20C08K2003/3045B29C48/04B29C48/40B29C2948/9259B29C2948/92885B29C2948/92895
Inventor 裘浩成娄小安路海冰沈叶龙孟成铭
Owner SHANGHAI SUNNY
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