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Continuous long glass fiber reinforced polypropylene composite and preparation method thereof

A long glass fiber and polypropylene technology, applied in the field of polymer materials, can solve the problems of high price of scratch resistance additives, large loss of scratch resistance performance, high material cost, etc., to improve stiffness, reduce linear expansion coefficient, Reduce the effect of dimensional changes and deformation problems

Inactive Publication Date: 2013-02-13
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, anti-scratch strip materials require high content of talcum powder to meet the requirement of low linear expansion coefficient. High content of talc powder will greatly damage the scratch resistance of the material, so the amount of scratch resistance additives must be increased to meet the requirements. However, scratch-resistant additives are expensive, resulting in high material costs, and there is a risk of stickiness by photolysis

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The first step: 77.1 kg of polypropylene PP S700 (melt flow rate is 10g / 10min), 0.2 kg of phenolic heat stabilizer Irganox 1010, 0.3 kg of phosphite ester heat stabilizer Irganox 168, 0.2 kg of hindered amine light stabilizer 770, 0.2 kg of polypropylene special nucleating agent TMP-5, 2 kg of maleic anhydride grafted polypropylene CA-100 are plasticized by a single screw extruder with a length-to-diameter ratio of 20:1 (rotating speed is 200r / min, from The temperature of each zone from the feeding section to the die is set to 140℃, 200℃, 240℃, 240℃, 250℃) and then transported to the high temperature melt infiltration tank in the high temperature melt infiltration die through the die, where the high temperature melt is infiltrated The temperature inside the die is 250℃;

[0031] The second step: the 20 kg of continuous long glass fiber Tufrov 4575 produced by PPG company is drawn into the high temperature melt infiltration tank at a speed of 20m / min. The length of the high...

Embodiment 2

[0036] The first step: 63 kg of polypropylene PP YPJ3860 (melt flow rate is 60g / 10min), 0.5 kg of phenolic heat stabilizer 1010, 0.5 kg of phosphite heat stabilizer 627A, 0.5 kg of hindered amine light stabilizer 622, 0.5 kg of polypropylene special nucleating agent HPN-20E, 5 kg of maleic anhydride grafted polypropylene CA-100 are plasticized by a 20:1 single screw extruder (rotating speed is 220r / min, from the feeding section to the machine The temperature of each zone of the head is set to 140°C, 220°C, 260°C, 280°C, 300°C) and then transported to the high temperature melt infiltration tank in the high temperature melt infiltration die through the die, the temperature in the high temperature melt infiltration die Is 300°C;

[0037] The second step: 30 kg of continuous long glass fiber Tufrov 4588 produced by PPG company is drawn into the high-temperature melt infiltration tank at a speed of 50m / min. The length of the high-temperature melt infiltration tank is 3m; fully infiltr...

Embodiment 3

[0043] The first step: 49 kg of polypropylene PP BX3920 (melt flow rate is 100g / 10min), 1 kg of phenolic heat stabilizer 1010, 1 kg of thioester heat stabilizer 412S, 1 kg of hindered amine light stabilizer 944, 1 kilogram of polypropylene special nucleating agent Millad NX8000, 7 kilograms of maleic anhydride grafted polypropylene Bondyram 1001 are plasticized by a 20:1 single screw extruder (rotational speed is 240r / min, from the feeding section to the various areas of the die The temperature is set to 140°C, 240°C, 260°C, 300°C, 320°C) and then transported to the high temperature melt infiltration tank in the high temperature melt infiltration die through the die. The temperature in the high temperature melt infiltration die is the temperature Is 320°C;

[0044] Step 2: Pull 40 kg of continuous long glass fiber Tufrov 4599 produced by PPG company into the high-temperature melt infiltration tank at a speed of 70m / min. The length of the high-temperature melt infiltration tank is...

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PUM

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Abstract

The invention discloses a continuous long glass fiber reinforced polypropylene composite and a preparation method thereof. The continuous long glass fiber reinforced polypropylene composite is characterized by being prepared from the following raw materials by weight percentages: 34-78 percent of polypropylene, 0-2 percent of heat stabilizer, 0-2 percent of light stabilizer, 0-2 percent of special nucleating agent for polypropylene, 2-10 percent of compatilizer and 20-50 percent of continuous long glass fiber. The composite has the advantages of high stiffness, high heat resistance, high size stability, weather resistance, good scratch resistance and low linear expansion coefficient and meets the production requirement of automotive rubbing strips.

Description

Technical field [0001] The invention relates to a continuous long glass fiber reinforced polypropylene composite special for automobile anti-scratch strips and a preparation method thereof, and belongs to the technical field of polymer materials. Background technique [0002] The car anti-scratch strip protects the body from scratches when the car passes through narrow obstacles. Therefore, the car anti-scratch strip itself must have a certain degree of scratch resistance and weather resistance. At the same time, the anti-scratch strip belongs to the car exterior parts. As the temperature of the external environment changes drastically, large dimensional changes and product deformations caused by thermal expansion and contraction cannot occur. Therefore, the anti-scratch strip material requires the material to have a low linear expansion coefficient (CLTE). [0003] With the development of the automotive industry, the automotive industry has increasingly higher requirements for low...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L51/06C08K13/04C08K7/14B29C70/52B29B9/06B60R13/04
Inventor 孙刚周英辉李国明程文超李欣李志平陈延安丁超罗忠富
Owner SHANGHAI KINGFA SCI & TECH