Modified injection-molding zipper and production technology thereof

A production process and modified technology, which is applied in the field of zipper manufacturing, can solve the problems of unsatisfactory single-teeth strength and single-teeth displacement strength of zippers, and achieves avoiding easy brittle cracking and falling off, good hardness and toughness, and low energy consumption Effect

Active Publication Date: 2017-11-10
ZHEJIANG WEIXING IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the toughness of the teeth can be improved, the impact resistance of the two kinds of resin injection molded zipper tooth groove gaps needs to be improved, and the single-teeth strength and single-teeth displacement strength of the zipper are not satisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Copolyoxymethylene, polyurethane elastomer, diphenylmethane diisocyanate MDI, BASF Chimassorb 2020 light stabilizer, Irganox1010 (ciba) and acrylic hydrazine are mixed to obtain a blended material; the quality of the copolyoxymethylene is 5000g; the polyurethane The content of the elastomer is 8wt% of the content of the polyoxymethylene copolymer; the content of the diphenylmethane diisocyanate MDI is 0.3wt% of the content of the polyoxymethylene copolymer; the BASF Chimassorb 2020 light stabilizer is 0.2%; the Irganox1010 (ciba) is 0.2wt% of the content of the polyoxymethylene copolymer; the acrylic acid hydrazine is 0.15wt% of the content of the polyoxymethylene copolymer.

[0047] After the blended material is obtained, the blended material is stirred and dried in a mixer for 30-60 minutes, and then granulated and extruded on a BP-8177-ZHB POM twin-screw extruder granulator, and then plastic injection molding is used for injection molding , to obtain modified injecti...

Embodiment 2

[0056] Copolyoxymethylene, polyurethane elastomer, diphenylmethane diisocyanate MDI, BASF Chimassorb 2020 light stabilizer, Irganox1010 (ciba) and acrylic hydrazine are mixed to obtain a blended material; the quality of the copolyoxymethylene is 5000g; the polyurethane The content of the elastomer is 4wt% of the content of the polyoxymethylene copolymer; the content of the diphenylmethane diisocyanate MDI is 0.2wt% of the content of the polyoxymethylene copolymer; the BASF Chimassorb 2020 light stabilizer is 0.2wt%; the Irganox1010 (ciba) is 0.2wt% of the content of the polyoxymethylene copolymer; the acrylic hydrazine is 0.15wt% of the content of the polyoxymethylene copolymer.

[0057] After the blended material is obtained, the blended material is stirred and dried in a mixer for 30-60 minutes, and then granulated and extruded on a BP-8177-ZHB POM twin-screw extruder granulator, and then plastic injection molding is used for injection molding , to obtain modified injection ...

Embodiment 3

[0066]Copolyoxymethylene, polyurethane elastomer, diphenylmethane diisocyanate MDI, BASF Chimassorb 2020 light stabilizer, Irganox1010 (ciba) and acrylic hydrazine are mixed to obtain a blended material; the quality of the copolyoxymethylene is 5000g; the polyurethane The content of the elastomer is 4wt% of the content of the polyoxymethylene copolymer; the content of the diphenylmethane diisocyanate MDI is 0.3wt% of the content of the polyoxymethylene copolymer; the BASF Chimassorb 2020 light stabilizer is the content of the polyoxymethylene copolymer 0.15wt%; the Irganox1010 (ciba) is 0.15wt% of the content of the polyoxymethylene copolymer; the acrylamide is 0.2wt% of the content of the polyoxymethylene copolymer.

[0067] After the blended material is obtained, the blended material is stirred and dried in a mixer for 30-60 minutes, and then granulated and extruded on a BP-8177-ZHB POM twin-screw extruder granulator, and then plastic injection molding is used for injection m...

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Abstract

The invention provides a production technology of a modified injection-molding zipper. The production technology comprises steps as follows: A), copolyoxymethylene, polyurethane elastomers, a compatibilizer and auxiliaries are mixed, and a mixed material is obtained, wherein the polyurethane elastomers account for 3wt%-8wt% of copolyoxymethylene; B), after granulating extrusion, the mixed material is subjected to injection molding, modified injection-molding particles are obtained, and the temperature of the injection molding is 180-220 DEG C; C), the modified injection-molding particles are subjected to color matching, injection molding of zipper teeth is performed, the modified injection-molding zipper is obtained, and the temperature of the injection molding of the zipper teeth is 180-220 DEG C. The modified injection-molding zipper has higher hardness, better wear resistance, higher corrosion resistance and better impact resistance, and furthermore, single-tooth strength and single-tooth displacement strength of the zipper are higher, so that the problem that the zipper teeth are prone to embrittlement and falling in a use process is solved; besides, the temperature of the injection molding is lower, therefore, the phenomenon of high-temperature oxidation discoloration of toner in a molding process is eliminated, and energy consumption is low.

Description

technical field [0001] The invention relates to the technical field of zipper manufacturing, in particular to a modified injection molded zipper and a production process thereof. Background technique [0002] At present, injection molded zippers at home and abroad are all produced by polyoxymethylene copolymer (POM) with good rigidity, hardness and wear resistance. Polyoxymethylene copolymer injection molded zipper has high zipper teeth hardness, excellent wear resistance and corrosion resistance, and simple processing technology. However, although the raw material of polyoxymethylene copolymer has high hardness, its toughness is poor. From the perspective of the final injection molded product, when the chain element design of the injection molded zipper is small, its impact resistance, especially the impact resistance of the notch is poor. The injection molded teeth need to be meshed, and the tooth parts need to be designed as grooves for mutual meshing. The recessed parts...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L59/04C08L75/04C08L61/22C08K5/00C08K5/29C08K5/134C08K5/25C08K5/526C08K5/524B29C45/00B29L5/00
Inventor 李叶斌
Owner ZHEJIANG WEIXING IND DEV
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