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Filling modified polypropylene material and preparation method thereof

A technology of polypropylene material and copolymerized polypropylene, which is applied in the field of filled modified polypropylene material and its preparation, can solve the problems of inability to carry out laser welding and affect the laser transmittance of the material, and achieve excellent light transmittance and satisfactory strength Requirements and the effect of expanding the application field

Inactive Publication Date: 2020-04-28
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the surrounding parts of the bumper have high requirements on the rigidity and toughness of the material, and are usually filled with modified polypropylene materials, conventional fillers, such as talcum powder, calcium carbonate, wollastonite, etc., have relatively high performance for 900-1100nm laser High barrier properties, so adding it to polypropylene will seriously affect the laser transmittance of the material, making laser welding impossible

Method used

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  • Filling modified polypropylene material and preparation method thereof
  • Filling modified polypropylene material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Formula: 83.9 parts of random copolymerized polypropylene, 15 parts of mica powder, 0.3 parts of hindered phenolic antioxidant, 0.3 part of phosphite antioxidant, 0.3 part of hindered amine light stabilizer, 0.2 part of stearic acid lubricant .

[0030] Put the above-mentioned raw materials into a high-speed mixer and mix them, the mixing speed is 600 rpm, and the mixing time is 1 min.

[0031] The above-mentioned mixed raw materials are fed into a twin-screw extruder, melt-blended, extruded and granulated at a temperature of 180° C. to finally obtain a product.

Embodiment 2

[0033] Formula: 73.9 parts of random copolymerized polypropylene, 10 parts of toughening agent A, 15 parts of mica powder, 0.3 parts of hindered phenolic antioxidant, 0.3 part of phosphite antioxidant, 0.3 part of hindered amine light stabilizer, stearin 0.2 parts of acid lubricant.

[0034] Put the above-mentioned raw materials into a high-speed mixer and mix them, the mixing speed is 600 rpm, and the mixing time is 1 min.

[0035] The above-mentioned mixed raw materials are fed into a twin-screw extruder, melt-blended, extruded and granulated at a temperature of 180° C. to finally obtain a product.

Embodiment 3

[0037] Formula: 73.9 parts of random copolymerized polypropylene, 10 parts of toughening agent B, 15 parts of mica powder, 0.3 parts of hindered phenolic antioxidant, 0.3 part of phosphite antioxidant, 0.3 part of hindered amine light stabilizer, stearin 0.2 parts of acid lubricant.

[0038] Put the above-mentioned raw materials into a high-speed mixer and mix them, the mixing speed is 600 rpm, and the mixing time is 1 min.

[0039] The above-mentioned mixed raw materials are fed into a twin-screw extruder, melt-blended, extruded and granulated at a temperature of 180° C. to finally obtain a product.

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Abstract

The invention relates to a filling modified polypropylene material and a preparation method thereof. The filling modified polypropylene material comprises the following components: co-polypropylene, aflexibilizer A, a flexibilizer B, mica powder, an antioxidant, a light stabilizer and a lubricant. Compared with the prior art, the polypropylene material has good permeability to 900-1100nm near-infrared light and can meet the requirements of laser welding; and more materials with different properties and good laser welding strength can be achieved through formula design due to the addition of the mica powder and the flexibilizer B, the performance bottleneck is broken through and the application field of the laser welding technology in plastic parts on automobiles is greatly broadened.

Description

technical field [0001] The invention belongs to the field of thermoplastic plastics, and in particular relates to a filled modified polypropylene material and a preparation method thereof. Background technique [0002] Friction vibration welding is currently a major way of linking automobile bumpers and their assembly parts. However, with the demand for lightweight vehicles, thin-walled bumpers are the main development trend. In the actual production process, when friction vibration welding is used to connect the bumper with the radar bracket or air curtain, welding marks will appear on the front of the bumper, which will affect the appearance. And laser welding can solve this problem very well. The principle is to use the heat generated by the laser beam to melt the surface layer of the plastic contact surface, so that the parts are bonded together. [0003] Taking the welding of bumper and radar bracket as an example, laser welding technology requires that the radar bra...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L23/08C08L23/16C08K13/06C08K9/06C08K3/34
CPCC08L23/14C08K13/06C08K9/06C08K3/34C08L2205/03C08L2201/10C08K2201/005C08L23/0815C08L23/16
Inventor 陈桂吉陈延安孙晓莲谢正瑞赵鹏伟卢先博孙刚李志平王琦玲
Owner SHANGHAI KINGFA SCI & TECH
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