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Method for eliminating tiger skin defect of polypropylene composition and polypropylene composition prepared thereby

A technology of polypropylene composition and tiger skin pattern, which is applied in the field of polymer material polypropylene, can solve problems such as no industrialized production scheme, and achieve the effects of large degree of indeterminateness, improved stability, and reduced shear

Active Publication Date: 2018-06-29
KINGFA SCI & TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are almost no industrialized production plans for the above materials, and there are many uncertain factors in the industrialized production process. Therefore, some research is needed on the stable preparation process of polypropylene compositions that eliminate tiger skin defects.

Method used

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  • Method for eliminating tiger skin defect of polypropylene composition and polypropylene composition prepared thereby
  • Method for eliminating tiger skin defect of polypropylene composition and polypropylene composition prepared thereby
  • Method for eliminating tiger skin defect of polypropylene composition and polypropylene composition prepared thereby

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Mix the raw materials of the polypropylene composition according to the ratio in Table 1, and then add them to the twin-screw extruder, and select the screw combination 1 for melt mixing, that is, the screw combination sequence of the melting and plasticizing section of the extruder is 45 / 5 / 42 , 45 / 5 / 42, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42 L, in the mixing and dispersing section The screw combination sequence is 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42, 52 / 52, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42, 52 / 52, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42. The temperature of each section of the extruder is 190° C., the screw speed is 400 rpm, extruded and granulated to obtain a polypropylene composition.

Embodiment 2

[0040] Mix the raw materials of the polypropylene composition according to the ratio in Table 1, and then add them to the twin-screw extruder, and select the screw combination 1 for melt mixing, that is, the screw combination sequence of the melting and plasticizing section of the extruder is 45 / 5 / 42 , 45 / 5 / 42, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42 L, in the mixing and dispersing section The screw combination sequence is 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42, 52 / 52, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42, 52 / 52, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42. The temperature of each section of the extruder is 200° C., the screw speed is 400 rpm, extruded and granulated to obtain a polypropylene composition.

Embodiment 3

[0042] Mix the raw materials of the polypropylene composition according to the ratio in Table 1, and then add them to the twin-screw extruder, and select the screw combination 1 for melt mixing, that is, the screw combination sequence of the melting and plasticizing section of the extruder is 45 / 5 / 42 , 45 / 5 / 42, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42 L, in the mixing and dispersing section The screw combination sequence is 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42, 52 / 52, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42, 52 / 52, 36 / 36, 45 / 5 / 42, 45 / 5 / 42, 45 / 5 / 42. The temperature of each section of the extruder is 200° C., the screw speed is 600 rpm, extruded and granulated to obtain a polypropylene composition.

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Abstract

The invention discloses a method for eliminating a tiger skin defect of a polypropylene composition and the polypropylene composition prepared thereby. The polypropylene composition comprises polypropylene resin, a toughening agent, a filler, a pigment and an auxiliary agent, wherein the polypropylene resin is formed by compounding high-flow polypropylene with the melt mass flow rate (MFR) of 30-120g / 10min and low-flow polypropylene with the melt mass flow rate (MFR) of 0.1-29g / 10min. By a preparation method, through a combined design of screws and adjustment of extrusion process parameters, the tiger skin defect of the prepared polypropylene composition can be eliminated; in addition, the preparation technology is stable and the repeatability is good. The polypropylene composition prepared by the method provided in the invention can be applied to automotive bumpers and interior products.

Description

technical field [0001] The invention relates to the technical field of polymer material polypropylene, in particular to a polypropylene composition for eliminating tiger skin defects and a preparation method thereof. Background technique [0002] Polypropylene PP, a semi-crystalline plastic, has the characteristics of low density and easy processing, and is widely used in automotive bumpers and interior trims. However, the appearance defect of tiger skin pattern is very easy to occur in the injection molding process of polypropylene material, which affects the appearance effect of the part and the subsequent processing performance. [0003] In order to reduce the tiger skin defect produced by the material during the injection molding process. CN102964686A uses a small-molecule polypropylene with a flow rate of 1800g / 10min as a tiger-stripe eliminating agent to prepare a composite material for eliminating tiger-skin lines, and briefly describes the preparation method. CN104...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/08B29B9/06B29C47/92B29C47/60B29C48/92
CPCB29C48/92B29C48/505B29B9/06C08L23/12B29C2948/926C08L2205/025C08L23/0815C08L23/08
Inventor 李振华李伟杨波吴国峰罗忠富王琪苏娟霞蒋团辉雷亮
Owner KINGFA SCI & TECH CO LTD
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