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Automotive polypropylene composite material with soft touch

A technology of composite materials and polypropylene, applied in the direction of coating, etc., can solve problems such as poor fluidity, unfavorable material processing, and reduce the fluidity of polypropylene, so as to save skin technology, enhance mechanical strength, and good compatibility Effect

Inactive Publication Date: 2021-04-06
苏州润佳高分子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high viscosity and poor fluidity of the elastomer, these systems also seriously reduce the fluidity of polypropylene, which is not conducive to the processing of materials.
In addition, there is a large difference between rubber and polypropylene. Direct mixing leads to poor compatibility between the two, and the dispersion is not uniform enough. During the extrusion, injection molding and other processes of the material, the material will produce flow, air bubbles, and thickness. Quality defects such as unevenness seriously affect the appearance and performance of the product

Method used

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  • Automotive polypropylene composite material with soft touch
  • Automotive polypropylene composite material with soft touch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of polypropylene composite material for vehicles with soft touch, specifically prepared by the following method:

[0035] (1) Pre-dry polypropylene, thermoplastic polyurethane elastomer, polyethylene grafted maleic anhydride, and calcium carbonate in an oven for 12 h;

[0036] (2) The raw materials dried in step (1) are passed through a twin-screw extruder, and melt-blended at a heating temperature of 220°C and a screw speed of 25 r / min through a melt extrusion process;

[0037] (3) The blend in step (2) is extruded and granulated in the carbon dioxide foamed plastic extrusion granulation molding equipment with carbon dioxide as the physical foaming agent to obtain the blend granules. The pressure of carbon dioxide is 10 bars;

[0038] (4) The blend particles in step (3) were irradiated with high-energy rays in an air atmosphere, and the irradiation dose was 150 kGy, so as to obtain the polypropylene composite material for vehicles with soft touch.

[0039] Whe...

Embodiment 2

[0040] Example 2: In parts by weight, the consumption of each component is: 60 parts of polypropylene, 15 parts of thermoplastic polyurethane elastomer, 1 part of polyethylene grafted maleic anhydride, and 5 parts of calcium carbonate. All the other steps and parameters are the same as in Example 1.

Embodiment 3

[0041] Embodiment 3: In parts by weight, the consumption of each component is: 50 parts of polypropylene, 18 parts of thermoplastic polyurethane elastomer, 3 parts of polyethylene grafted maleic anhydride, and 8 parts of calcium carbonate. All the other steps and parameters are the same as in Example 1.

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Abstract

The invention provides an automotive polypropylene composite material with soft touch. The automotive polypropylene composite material is prepared by the following method: (1) respectively pre-drying polypropylene, thermoplastic polyurethane elastomer, polyethylene grafted maleic anhydride and calcium carbonate in an oven for 12-24 hours; (2) enabling the raw materials dried in the step (1) to pass through a twin-screw extruder, and carrying out melt blending at the heating temperature of 210-230 DEG C and the screw rotating speed of 20-30 r / min through a melt extrusion process; (3) carrying out extrusion granulation on the blend obtained in the step (2) in carbon dioxide foamed plastic extrusion granulation molding equipment by taking carbon dioxide as a physical foaming agent to obtain blend particles; and (4) irradiating the blend particles obtained in the step (3) under high-energy rays in an air atmosphere, thereby obtaining the product. The material provided by the invention has good compatibility, the surface appearance of the material is uniform, and cracks and flow marks are avoided.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a polypropylene composite material for vehicles with soft touch. Background technique [0002] Automotive materials made of mineral-filled polypropylene have the advantages of low density, good mechanical properties, corrosion resistance, low price, and easy recycling, and are now widely used in the interior manufacturing of passenger cars. With the vigorous development of the automobile industry, modern people have put forward further requirements for interior materials. Places such as dashboards, door panels, bumpers, etc. need to use plastic parts with high strength, impact resistance, scratch resistance, and good stability. Compared with traditional mineral-filled polypropylene materials, glass fiber-reinforced polypropylene materials have gradually entered people's field of vision. Glass fiber-reinforced polypropylene materials have higher strength and impact resistance, bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L75/04C08L51/06C08K3/26C08J9/12C08J9/00C08J9/36
CPCC08J9/122C08J9/0061C08J9/0066C08J9/36C08J2323/12C08J2475/04C08J2451/06C08J2203/06C08K2003/265
Inventor 汪理文翁永华陈胜徐翠萍徐可可
Owner 苏州润佳高分子材料有限公司