A method for eliminating the tiger skin defect of polypropylene composition and the polypropylene composition prepared thereof

A technology of polypropylene composition and tiger skin pattern, which is applied in the field of polymer material polypropylene, can solve the problems such as no industrialized production plan, achieve a large degree of indeterminate shape, eliminate tiger skin pattern, and increase the effect of mutual fusion

Active Publication Date: 2019-11-26
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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  • A method for eliminating the tiger skin defect of polypropylene composition and the polypropylene composition prepared thereof
  • A method for eliminating the tiger skin defect of polypropylene composition and the polypropylene composition prepared thereof
  • A method for eliminating the tiger skin defect of polypropylene composition and the polypropylene composition prepared thereof

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., and the screw speed is 400 rpm, and 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 preparation method of a polypropylene composition for eliminating tiger stripe defects and the prepared polypropylene composition. The polypropylene composition includes a polypropylene resin, a toughening agent, a filler, a pigment, and an auxiliary agent, wherein the polypropylene resin adopts a high-flow polypropylene with a melt mass flow rate (MFR) of 30-120 g / 10min and Low-flow polypropylene with a melt mass flow rate (MFR) of 0.1-29g / 10min is used for compounding. The preparation method enables the prepared polypropylene composition to eliminate tiger skin grains through screw combination design and extrusion process parameter adjustment, and the preparation process is stable and repeatable. The polypropylene composition prepared by the invention can be used in automobile bumpers and interior decoration 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 Patents(China)
IPC IPC(8): C08L23/12C08L23/08B29B9/06B29C48/92B29C48/60
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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