High-strength nylon composite and preparation method thereof

A nylon composite material and high-strength technology, which is applied in the field of fiber and modified nano-scale composite reinforced nylon material, high-strength nylon composite material and its preparation, can solve the problem of poor mechanical properties of composite materials, shortened service life of materials, and general appearance. There are problems such as floating fibers, achieving good thermal stability, improving crystallinity, improving interfacial wetting performance and dispersibility

Active Publication Date: 2019-03-08
BEIJING INST OF AEROSPACE TESTING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nylon has good mechanical properties, solvent resistance and abrasion resistance, but it has poor dimensional stability and is easy to absorb water
In order to meet the requirements of many aspects of its application, nylon modification has been continuously studied at home and abroad. Among them, the study of the interfacial compatibility between fibers or fillers and nylon matrix is ​​the key to the performance of composite materials. Poor compatibility will cause Composite materials have poor mechanical properties, white appearance, floating fibers and easy warping, etc.
In addition, because nylon contains a large number of amide groups, the water absorption rate is relatively high, which will reduce the strength of the material, and at the same time, it is more likely to be aged in a hot oxygen environment, shortening the service life of the material

Method used

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  • High-strength nylon composite and preparation method thereof
  • High-strength nylon composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A high-strength nylon composite material consisting of the following mass percentages:

[0040] 69 parts of nylon 6, 20 parts of chopped glass fiber with a length of 5 mm, 10 parts of multifunctional materials, 0.1 part of 1098, 0.2 part of 168 and 0.2 part of 5524, 0.5 part of silicone powder;

[0041] The preparation method comprises the following steps:

[0042] The processing conditions for melt extrusion of the extruder are as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 230°C, the temperature of the third zone is 240°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 260°C, the temperature of the sixth zone is 260°C, and the temperature of the seventh zone 265°C, the temperature in the eighth zone is 270°C, the temperature in the ninth zone is 265°C, the temperature of the machine head is set to 270°C, and the current of the host is 210-230A;

[0043] Nylon, anti-oxidant aging agent a...

Embodiment 2

[0048] A high-strength nylon composite material consisting of the following mass percentages:

[0049] 67 parts of nylon 6, 30 continuous glass fiber, 2 parts of multifunctional material, 0.1 part of 1098, 0.2 part of 168 and 0.2 part of 5524, 0.5 part of silicone powder;

[0050] The preparation method comprises the following steps:

[0051] The processing conditions for melt extrusion of the extruder are as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 230°C, the temperature of the third zone is 240°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 260°C, the temperature of the sixth zone is 260°C, and the temperature of the seventh zone 265°C, the temperature in the eighth zone is 270°C, the temperature in the ninth zone is 265°C, the temperature of the machine head is set to 270°C, and the current of the host is 210-230A;

[0052] Nylon, anti-oxidant aging agent and lubricant are added in the ...

Embodiment 3

[0057] A high-strength nylon composite material consisting of the following mass percentages:

[0058] 70.5 parts of nylon 6, 25 parts of chopped basalt fiber with a length of 3 mm, 3 parts of multifunctional materials, anti-oxidant aging agents are 0.1 part of 508, 0.2 part of 626, 0.2 part of 5524 and 0.2 part of 944, 0.8 part of modified ethylene bis-stearin acid amide;

[0059] The preparation method comprises the following steps:

[0060] The processing conditions for melt extrusion of the extruder are as follows: the temperature of the first zone is 210°C, the temperature of the second zone is 230°C, the temperature of the third zone is 240°C, the temperature of the fourth zone is 250°C, the temperature of the fifth zone is 260°C, the temperature of the sixth zone is 260°C, and the temperature of the seventh zone 265°C, the temperature in the eighth zone is 270°C, the temperature in the ninth zone is 265°C, the temperature of the machine head is set to 270°C, and the cu...

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Abstract

The invention discloses a high-strength nylon composite and a preparation method thereof. The composite is prepared from raw materials in percentage by mass as follows: 40wt%-99wt% of nylon, 0-40wt% of fiber, 0.05wt%-20wt% of a multifunctional material, 0.1wt%-2wt% of an oxidative aging resisting agent and 0.1wt%-2wt% of a lubricant. The preparation method of the composite comprises the steps as follows: nylon, the self-made multifunctional material, the oxidative aging resisting agent and the lubricant are uniformly mixed in a high-speed mixer in the mass ratio, a premix is obtained for lateruse, the premix is added from a main feeding port of a twin-screw extruder, short chopped fiber or continuous long fiber is added from a first side feeding port in proportion, for example, the self-made multifunctional material is added from a second side feeding port of the extruder in proportion in a filler form, the temperature of the extruder is controlled at 210-280 DEG C, the obtained material and drawn out, cooled and granulated, and the composite is obtained. Compared with the prior art, the composite has the advantages that the self-made multifunctional material has a synergistic effect with fiber after being added, the rigidity, toughness and thermal deformation of the prepared composite are substantially improved, meanwhile, the prepared composite material has no floating fiberand white spots in appearance, high wear resistance and lower strength reduction after thermo-oxidative aging.

Description

technical field [0001] The invention relates to a fiber and modified nano-scale composite reinforced nylon material, specifically a high-strength nylon composite material and a preparation method thereof, belonging to the technical field of modified nylon technical materials. Background technique [0002] Nylon, also known as polyamide, is Polyamide in English, or PA for short. Its molecular chain contains repeated amide groups -[CONH]-. It is an engineering plastic with excellent comprehensive performance and is widely used in the fields of building materials, automobiles, aviation and aerospace. Especially now that automobiles are increasingly required to be lightweight, many parts require plastic to replace steel, especially the peripheral parts of automobile engines, the performance requirements of composite reinforced nylon are very high. [0003] Nylon has good mechanical properties, solvent resistance and abrasion resistance, but it has poor dimensional stability and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08L83/04C08K7/14C08K5/20C08K5/526C08K9/04C08K7/26C08K7/10C08K13/06
CPCC08L77/02C08L77/06C08L2205/24C08L2201/08C08L83/04C08K7/14C08K5/20C08K5/526C08K9/04C08K7/26C08K7/10C08K13/06
Inventor 苏昱孟征吴超孙兆懿钱晶黄兴宇安峻莹舒帮建陈婧姜昊郭新利贺芳郑骏驰肖军敏
Owner BEIJING INST OF AEROSPACE TESTING TECH
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