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High-toughness low-shrink polyamide material and preparation method thereof

A shrinking polyamide and high-toughness technology, applied in the field of high-toughness and low-shrinkage polyamide materials and their preparation, can solve the problems of frequent replacement, high cost, and low material strength, and achieve complementary strength and toughness, and low material shrinkage. , the effect of good surface quality

Inactive Publication Date: 2010-11-03
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, injection molding of this type of material is relatively difficult, and the requirements for mold temperature, injection molding process, mold structure, exhaust system, etc. are also high, and the surface of the product is relatively rough, and the flow marks of the product are relatively obvious
The other is low-temperature-resistant super-tough materials. This type of material has very good toughness and surface gloss, and has a good low-temperature resistance effect, but the strength of the material is not high, and the shrinkage rate is relatively large. It is easy to soften under use
In some special environments, such as sometimes low temperature and sometimes high temperature, good toughness has low strength and poor heat resistance; good strength and good heat resistance have poor low temperature toughness
It may lead to the selection of different materials for a part under different temperature conditions, frequent replacement, high cost, and inconvenient operation

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Components (percentage by weight) PA666 8.4%, lubricant 0.3%, mica 15%, toughening agent 15%, anti-wear agent 1%, antioxidant 0.3%.

[0032] Preparation method: Weigh the above-mentioned raw materials, add the raw materials into the mixing barrel in order and mix for 6-10 minutes, and the rotating speed of the mixing barrel is 500-1200 rpm; put the mixed raw materials in the feeding barrel of the extruder, It is melted and extruded by a twin-screw extruder, and granulated; the process conditions are: the temperature of the first zone of the twin-screw extruder is 240-260°C, the temperature of the second zone is 250-270°C, the temperature of the third zone is 250-280°C, and the temperature of the fourth zone is 250-280°C. The zone temperature is 260-280°C, the fifth zone is 250-265°C, the conveying time of the mixture in the screw is 1 minute, and the pressure is 10-20MPa. The processing technology of high temperature and low rotation speed is adopted to make the compone...

Embodiment 2

[0034] Components (percentage by weight) PA666 2.4%, lubricant 0.3%, mica 15%, toughening agent 20%, anti-wear agent 2%, antioxidant 0.3%.

[0035] Preparation method: Weigh the above-mentioned raw materials, add the raw materials into the mixing barrel in order and mix for 6-10 minutes, and the rotating speed of the mixing barrel is 500-1200 rpm; put the mixed raw materials in the feeding barrel of the extruder, It is melted and extruded by a twin-screw extruder, and granulated; the process conditions of the twin-screw extruder are: the temperature of the first zone of the twin-screw extruder is 240-260°C, the temperature of the second zone is 250-270°C, and the temperature of the third zone is 250 ~280℃, the temperature of the fourth zone is 260~280℃, the fifth zone is 250~265℃, the conveying time of the mixture in the screw is 1 minute, and the pressure is 10-20MPa. The processing technology of high temperature and low rotation speed is adopted to make the components of the...

Embodiment 3

[0037] Components (percentage by weight) PA666 1.4%, lubricant 0.3%, mica 22%, toughening agent 15%, anti-wear agent 1%, antioxidant 0.3%.

[0038] Preparation method: Weigh the above-mentioned raw materials, add the raw materials into the mixing barrel in order and mix for 6-10 minutes, and the rotating speed of the mixing barrel is 500-1200 rpm; put the mixed raw materials in the feeding barrel of the extruder, It is melted and extruded by a twin-screw extruder, and granulated; the process conditions of the twin-screw extruder are: the temperature of the first zone of the twin-screw extruder is 240-260°C, the temperature of the second zone is 250-270°C, and the temperature of the third zone is 250 ~280℃, the temperature of the fourth zone is 260~280℃, the fifth zone is 250~265℃, the conveying time of the mixture in the screw is 1 minute, and the pressure is 10-20MPa. The processing technology of high temperature and low rotation speed is adopted to make the components of the...

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Abstract

The invention discloses a high-toughness low-shrink polyamide material and a preparation method thereof. The high-toughness low-shrink polyamide material is prepared from the following components in percentage by weight: 50-68% of polyhexamethylene adipamide resin, 20-30% of mica powder, 10-20% of toughener, 0.3-0.6% of lubricant, 0.3-0.6% of antioxidant and 1-2% of dispersant. The invention combines the enhancement and toughening technologies, regulates the overall performance of the product based on material selection, achieves an overall balance among strength, heat resistance and low-temperature characteristics, and ensures that the material has favorable mechanical properties at both low temperature and normal temperature and the strength and the toughness are relatively complemented. Besides, the high-toughness low-shrink polyamide material has the advantages of small shrinkage, high surface quality and low material cost, thereby being an economical, practical and durable modified composite material.

Description

[technical field] [0001] The invention relates to the technical field of polymer materials, in particular to a high-toughness and low-shrinkage polyamide material and a preparation method thereof. [Background technique] [0002] Nowadays, the application of plastic materials is becoming more and more extensive. In many industrial fields, plastics are widely used to replace other metal materials. The engineering plastics industry has achieved rapid development. At present, most of the PA66 reinforced materials produced in China are reinforced by glass fiber or mineral filling. This kind of material has better mechanical strength and heat resistance, and is widely used in many industrial fields. This type of material is mainly used to make large-scale moving parts such as rotating shafts, gears, mechanical transmission parts or structural parts with high strength requirements such as shells and bases. However, injection molding of this type of material is relatively difficult...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K13/02C08K3/34
Inventor 徐东贺永王贤文
Owner SHENZHEN KEJU NEW MATERIAL
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