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Polyamide 6 composition for gas-assisted injection

A gas-assisted injection molding and polyamide technology, which is applied in the field of engineering plastics, can solve problems such as weld lines and flow marks, low melt strength, and glass fiber exposure, and achieve high impact performance, good dimensional stability, and high melt intensity effect

Inactive Publication Date: 2009-05-27
SHANGHAI SUNNY
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AI Technical Summary

Problems solved by technology

Due to the poor fluidity of ordinary glass fiber modified polyamide 6, there are obvious weld marks and flow marks on the surface of injection molded products, and even the phenomenon of glass fiber exposure, which seriously affects the appearance of its products. At the same time, its melt strength is not good. High, not suitable for gas-assisted injection molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-2

[0016] Adopting viscosity is the PA6 chip of 2.8, and glass fiber is used alkali-free glass fiber, and inorganic mineral is used kaolin, and the compatibilizer of embodiment 1 grafts maleic anhydride graft polymer CMG9805 with polyolefin elastomer, the compatibilization of embodiment 2 The agent uses EPDM rubber grafted with maleic anhydride graft polymer CMG9802, the antioxidant is 1098 / 168 (1:1), and the coupling agent is KH550.

[0017] Matching ratio 1-2

[0018] raw material name Proportion 1 (wt%) Proportion 2 (wt%) PA6 slice 54 54 glass fiber 20 20 high territory 20 20 CMG9801 5 -- CMG9802 -- 5 1098 / 168(1∶1) 0.5 0.5 KH550 0.5 0.5

[0019] According to the conventional method, put the above-mentioned weight percentage raw materials except glass fiber into the high mixer and mix for 2-5 minutes, then extrude and granulate together with the glass fiber with a screw extruder, the processing temperature is 200-...

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Abstract

The invention relates to a polyamide 6 composition used for gas aided injection molding, which is characterized by comprising the following compositions by weight percentage: 40 to 80 percent of polyamide 6 slice, 5 to 30 percent of fiber glass, 5 to 30 percent of inorganic mineral, 1 to 10 percent of compatilizer, 0.1 to 0.5 percent of antioxidant, and 0.1 to 0.5 percent of coupling agent. The polyamide 6 composition has the characteristics of higher melt strength, excellent dimension stability, good chemical resistance, smooth product surface and the like, and can be both used for gas aided injection molding of an automobile door pull and other automobiles and mechanical and electrical products suitable for gas aided injection molding.

Description

technical field [0001] The invention relates to a polyamide 6 composition which can be used for gas-assisted injection molding, which has the characteristics of high melt strength, excellent chemical resistance, good dimensional stability, and smooth surface of the product, and can be used for gas-assisted injection molding automobile doors The handle can also be used to process other auto parts and electromechanical products suitable for gas-assisted injection molding, and belongs to the technical field of engineering plastics. technical background [0002] Polyamide 6 has good physical and mechanical properties, such as high tensile strength, excellent wear resistance, good impact resistance, outstanding chemical resistance and oil resistance, and is the most widely used variety among the five major engineering plastics. Since car door handles and other automotive or electromechanical products are all appearance parts, the requirements for the surface finish of the product...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08K9/06C08K7/14C08K5/524C08L51/06
Inventor 柴振东陈晓东
Owner SHANGHAI SUNNY
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