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Polyamide composite material and preparation method thereof

A composite material and polyamide technology, applied in the field of polyamide composite materials and its preparation, can solve the problems of low friction coefficient, high dry friction coefficient, low surface hardness, etc.

Inactive Publication Date: 2015-06-24
SHENZHEN XINGSHENGDI NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, its wide application in the field of tribology is limited due to its low impact resistance, high water absorption, and high dry friction coefficient with tempered glass.
Polyethylene has a relatively low coefficient of friction, excellent self-lubricating properties, low water absorption and excellent impact toughness. Therefore, people blend polyamide and polyethylene to prepare alloy materials, but polyethylene has low surface hardness, Due to the defects of poor abrasive wear resistance and difficult processing, the existing composite materials of polyamide and polyethylene still have the problem of poor mechanical properties and wear resistance

Method used

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  • Polyamide composite material and preparation method thereof
  • Polyamide composite material and preparation method thereof
  • Polyamide composite material and preparation method thereof

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preparation example Construction

[0037] Such as figure 1 As shown, the preparation method of the polyamide composite material in one embodiment can be used to prepare the above-mentioned polyamide composite material. The preparation method of above-mentioned polyamide composite material comprises the steps:

[0038] Step S110: Weigh the following raw materials in parts by mass: 60-90 parts of polyamide, 10-40 parts of polyethylene, 2-10 parts of compatibilizer, 0.1-1 part of antioxidant, 20-40 parts of filler, 1-1.5 parts of joint agent and 0.1-2 parts of lubricant.

[0039] Among them, polyamide (PA), also known as nylon. Preferably, the polyamide is polyamide 6.

[0040] Preferably, the relative viscosity of the polyamide is 2.4-2.8.

[0041] Among them, the number average molecular weight of polyethylene is 2 to 5 million; the density is 0.936 to 0.946g / cm 3 ; The particle size of polyethylene is 50-100 mesh.

[0042] The compatibilizer is maleic anhydride grafted high-density polyethylene, for examp...

Embodiment 1

[0058] The preparation steps of the polyamide composite material of the present embodiment are as follows:

[0059] (1) Take the following raw materials according to the parts by mass:

[0060]

[0061] (2) Stir and mix the alkali-free glass fiber and glass microspheres with the silane coupling agent KH-550 in a high-speed mixer with a rotation speed of 1800 rpm at 65°C to obtain a premix; mix the premix with polyamide 6. Polyethylene, maleic anhydride grafted high-density polyethylene, antioxidant 1098 and ethylene bisstearamide were mixed in a high-speed mixer for 12 minutes to obtain a mixture; wherein, the diameter of the alkali-free glass fiber was 8 to 15 Micron, the aspect ratio is 5-10, the particle size of glass beads is 2 microns; the relative viscosity of polyamide 6 is 2.4; the number average molecular weight of polyethylene is 200, and the density is 0.936g / cm 3 , The particle size of polyethylene is 50 mesh.

[0062] (3) Put the mixture in the twin-screw ext...

Embodiment 2

[0066] The preparation steps of the polyamide composite material of the present embodiment are as follows:

[0067] (1) Take the following raw materials according to the parts by mass:

[0068]

[0069] (2) Stir and mix the alkali-free glass fiber and glass microspheres with the silane coupling agent KH-550 in a high-speed mixer with a rotation speed of 2800 rpm at 85°C to obtain a premix; mix the premix with polyamide 6. Mix polyethylene, maleic anhydride grafted high-density polyethylene, antioxidant 1098 and ethylene bisstearamide in a high-speed mixer for 10 to 12 minutes to obtain a mixture; wherein, the diameter of the alkali-free glass fiber is 8 ~15 microns, aspect ratio 5~10, particle size of glass beads is 2 microns; relative viscosity of polyamide 6 is 2.8; number average molecular weight of polyethylene is 500, density is 0.946g / cm 3 , The particle size of polyethylene is 100 mesh.

[0070] (3) Put the mixture in the twin-screw extruder, and set the screw spee...

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Abstract

The invention relates to a polyamide composite material and a preparation method thereof. The polyamide composite material comprises the following raw materials in parts by weight: 60-90 parts of polyamide, 10-40 parts of polyethylene, 2-10 parts of a compatilizer, 0.1-10 parts of an antioxidizer, 20-40 parts of a filling agent, 1-1.5 parts of a coupling agent, and 0.1-2 parts of a lubricating agent, wherein the filling agent is a glass microsphere and alkali-free glass fibre. The polyamide composite material has better mechanical property and wear-resisting property.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a polyamide composite material and a preparation method thereof. Background technique [0002] Polyamide (PA) has good corrosion resistance, good heat resistance, high tensile strength and easy processing fluidity, and has gradually replaced traditional metal materials in many aspects. However, its wide application in the field of tribology is limited due to its low impact resistance, high water absorption, and high dry friction coefficient with tempered glass. Polyethylene has a relatively low coefficient of friction, excellent self-lubricating properties, low water absorption and excellent impact toughness. Therefore, people blend polyamide and polyethylene to prepare alloy materials, but polyethylene has low surface hardness, Due to defects such as poor abrasive wear resistance and difficult processing, the existing composite materials of polyamide and polyethylene ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L23/06C08L51/06C08K13/06C08K9/06C08K7/20C08K7/14
CPCC08L77/02C08K2201/003C08K2201/014C08K2201/016C08L2205/025C08L2205/03C08L2205/035C08L2205/08C08L23/06C08L51/06C08K13/06C08K9/06C08K7/20C08K7/14C08K5/20C08K5/1345C08K5/526
Inventor 许第修包含
Owner SHENZHEN XINGSHENGDI NEW MATERIALS
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