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Polyamide material and its preparing process

A technology for polyamide and raw materials, applied in the field of polyamide materials and their preparation, can solve the problems of not improving long-term thermal stability, not making breakthrough progress, and high dimensional accuracy requirements, and achieving low cost, low production cost, high strength High retention rate

Inactive Publication Date: 2007-07-11
SHENZHEN KEJU NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of glass fiber has caused other forming problems, that is, the injection molded products will have serious warping problems, the melt fluidity during the injection molding process will also become poor, and its long-term thermal stability has not yet been obtained. Improvement, which is undoubtedly fatal for applications in the fields of mechatronics, automobiles and other fields that require high dimensional accuracy and long-term thermal stress. No breakthroughs have been made, and the research results in this field are still blank

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The weight ratio is PA66---49%, PA6---16%, 493D---4.5%, KW-10---5%, 1010---0.2%, H161---0.3% dry blending 4 Minutes, after that, blend 25% of the glass fiber whose surface has been treated with coupling agent KH550 in a twin-screw extruder, and then melt extrude and granulate to make a composite material. The heating zones of the screw are set as follows: the first zone is 240°C, the second zone is 250°C, the third zone is 270°C, the fourth zone is 275°C, the total residence time is 2 minutes, and the melt pressure is 16Mpa.

Embodiment 2

[0036] Mix the weight ratio of PA66---45%, PA6---16%, 493D---4.5%, KW-10---9%, 1010---0.2%, H161---0.3% at high speed Dry blending in a container at room temperature for 4 minutes, and then blending with 25% of glass fibers whose surface has been treated with coupling agent KH550 in a twin-screw extruder, melt extruding, and granulating to form a composite material. The heating zones of the screw are set as follows: the first zone is 240°C, the second zone is 250°C, the third zone is 270°C, the fourth zone is 275°C, the total residence time is 2 minutes, and the melt pressure is 16Mpa.

Embodiment 3

[0038] Mix the weight ratio of PA66---41%, PA6---16%, 493D---4.5%, KW-10---13%, 1010---0.2%, H161---0.3% at high speed Dry blending in a container at room temperature for 4 minutes, and then blending with 25% of glass fibers whose surface has been treated with coupling agent KH550 in a twin-screw extruder, melt extruding, and granulating to form a composite material. The heating zones of the screw are set as follows: the first zone is 240°C, the second zone is 250°C, the third zone is 270°C, the fourth zone is 275°C, the total residence time is 2 minutes, and the melt pressure is 16Mpa.

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Abstract

The invention discloses a polyamide material and making method, which comprises the following parts: 45-65% PA, 10-40% glass fiber, 2-10% compatible flexibilizer, 5-25% mineral fill, 0.2-2% antioxidant and 0.1-2% heat stabilizer. The making method comprises the following steps: weighing raw material; disposing the surface of glass fiber through gamma-amphotaethoxy silane; blending polyamide, compatible flexibilizer, heat stabilizer, anti-oxidant and mineral fill in the high-speed blender for 1-4min; placing glass fiber and mixed raw material in the double-screw squeezer to mix; fusing; squeezing; graining.

Description

[technical field] [0001] The invention relates to a polyamide material, in particular to a polyamide material with high strength, high heat resistance and low warpage performance and a preparation method thereof. [Background technique] [0002] As the first of the five major engineering plastics, polyamide has a series of excellent physical and mechanical properties determined by its special molecular structure, but its large shrinkage, strong water absorption, poor dimensional stability, and poor long-term heat resistance severely limit its Applications in automotive, mechatronics and other fields. In order to make full use of these excellent properties of polyamide materials and meet their application requirements in various aspects, people have done a lot of work, by adding various additives to polyamide materials, so as to achieve the ideal purpose required by people. For example, the strength, dimensional stability and short-term heat resistance of the system can be gr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/00C08K7/20C08L51/00C08K5/29C08K5/524
Inventor 徐东贺永迟宏宇
Owner SHENZHEN KEJU NEW MATERIAL
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