Low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material and preparation method

A composite material, polypropylene technology, applied in the field of modified polypropylene composite material and its preparation, can solve the problems of poor low-temperature impact resistance, high polyamide warpage, limited application, etc., to achieve good mechanical properties, good Effects of impact resistance, low warpage, and low glass transition temperature

Inactive Publication Date: 2018-06-29
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-fiber modified polyamides often have the defects of high warpage and poor low-temperature impact resistance, which limit their further applications in low-temperature environments

Method used

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  • Low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material and preparation method
  • Low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material and preparation method
  • Low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material and preparation method

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Experimental program
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preparation example Construction

[0034]

[0035] A kind of preparation method of modified polypropylene composite material, it comprises the following steps:

[0036] (1), weigh 50-73 parts of polypropylene, 5-12 parts of toughening agent, 1-3 parts of compatibilizer and 0.4-1.0 part of antioxidant, and mix them uniformly in a high-speed mixer to obtain a mixture;

[0037] (2), the compound is added in the screw extruder, and pelletized by the strands of the screw extruder to obtain a polypropylene resin semi-finished product in the form of pellets;

[0038] (3) Feed the polypropylene resin semi-finished product into the impregnation mold at a certain speed and make it reach a molten state, so that the glass fiber is immersed in the molten polypropylene resin semi-finished product while pultruding, by controlling the drawing of the glass fiber The extrusion speed and the feeding speed of the polypropylene resin semi-finished product are adjusted to the content of glass fiber to 15-40 parts, and the modified...

Embodiment 1

[0044] This embodiment provides a kind of modified polypropylene composite material, and its production raw material comprises the following components:

[0045]

[0046]

[0047] Present embodiment also provides a kind of preparation method of modified polypropylene composite material, it comprises the following steps:

[0048] (1), weigh 73 parts of polypropylene, 10 parts of toughening agent (POE), 2 parts of compatibilizer (PP‐g‐MAH), 0.5 part of antioxidant (0.2 part of antioxidant 1330 and 0.3 part of antioxidant agent ST300), mixed in a high-speed mixer to obtain a mixture; the speed of the high-speed mixer is 800-1000rpm, the mixing temperature is 40°C, and the mixing time is 10min;

[0049] (2) Pour the mixture into a twin-screw extruder, control the temperature of each zone to 190-210°C, and cut into pellets through the strands of the twin-screw extruder to obtain a semi-finished polypropylene resin in the form of pellets;

[0050] (3) Feed the polypropylene r...

Embodiment 2

[0052] This embodiment provides a kind of modified polypropylene composite material, and its production raw material comprises the following components:

[0053]

[0054] Present embodiment also provides a kind of preparation method of modified polypropylene composite material, it comprises the following steps:

[0055](1), Weigh 70 parts of polypropylene, 7 parts of toughening agent (5 parts of POE and 2 parts of MBS), 3 parts of compatibilizer (PP‐g‐GMA), 1.0 part of antioxidant (0.2 part of antioxidant 1330, 0.3 part of antioxidant ST300 and 0.5 part of antioxidant DSTDP), mixed in a high-speed mixer to obtain a compound; the speed of the high-speed mixer is 800-1000rpm, the mixing temperature is 50°C, and the mixing time is 3min;

[0056] (2) Pour the mixture into a twin-screw extruder, control the temperature of each zone to 190-210°C, and cut into pellets through the strands of the twin-screw extruder to obtain a semi-finished polypropylene resin in the form of pellet...

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Abstract

The invention provides a low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material and a preparation method. A production raw material of the low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material is prepared from the following components: 50 to 73 parts of polypropylene, 5 to 12 parts of a flexibilizer, 1 to 3 parts of a compatilizer,15 to 40 parts of glass fiber and 0.4 to 1.0 part of an antioxidant. A production method of the low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material comprises the following steps: mixing all the components except the glass fiber, bracing and pelletizing the mixture to obtain a polypropylene resin semi-finished product, soaking the glass fiber into the melted polypropylene resin semi-finished product, and bracing and pelletizing the mixture to obtain the low-warpage high-impact-resistance long fiber-enhanced polypropylene composite material. The polypropylenecomposite material disclosed by the invention is relatively low in warpage performance, is also relatively high in low-temperature impact resistance and relatively good in mechanical property, and can be applied to a freezing environment.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a modified polypropylene composite material and a preparation method thereof. Background technique [0002] Polyamide, also known as nylon, refers to a polymer with amide (CONH) repeating structural units on the polymer chain. In order to further expand the application of polyamide, it is often necessary to modify it, for example, using long fibers to modify polyamide to improve its mechanical properties. However, long-fiber modified polyamides often have the defects of high warpage and poor low-temperature impact resistance, which limit their further applications in low-temperature environments. Contents of the invention [0003] The present invention aims at the deficiencies of the prior art, and the main purpose is to provide a modified polypropylene composite material, which not only has high low-temperature impact resistance, but also has low warpage performance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08C08L51/06C08L51/04C08K13/04C08K7/14B29C47/92B29C48/92
CPCC08L23/14B29C48/92B29C2948/92704C08K2201/014C08K2201/016C08L2205/025C08L2205/03C08L2205/035C08L23/0815C08L51/06C08K13/04C08K7/14C08L51/04
Inventor 杨桂生赵亚囡李兰杰
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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