High performance polyamide 6 based friction material and preparation method thereof

A technology of friction material and polyamide, which is applied in the field of high-performance polyamide 6-based friction material and its preparation, can solve the problem of insufficient thermal and mechanical properties to cope with high-speed friction, reduced mechanical properties and friction and wear properties, and large friction coefficient and wear and other problems, to achieve the effect of cheap mechanical strength, low friction coefficient and wear rate, and excellent mechanical properties

Inactive Publication Date: 2016-03-09
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its dimensional stability is poor, its water absorption rate is high, its friction coefficient is high during dry friction, and its thermal and mechanical properties are not enough to cope with high-speed friction, so its application is still limited to a certain extent.
[0003] In recent years, the addition of fibers and inorganic particles to improve the wear resistance and mechanical properties of polyamide 6 at home and abroad often increases the friction coefficient; while the addition of solid lubricants can reduce the friction coefficient, but may increase the wear rate, Reduced its mechanical properties; while adding flame retardant and antistatic agents to prepare flame retardant and antistatic composite materials, the mechanical properties and friction and wear properties are reduced, and the preparation of high strength, flame retardant and wear-resistant polyamide 6 composite materials needs to be solved urgently
[0004] Patent CN103102A introduces a preparation method of a high-impact, flame-retardant and wear-resistant polyamide 6 composite material, and obtains a polyamide 6 composite material with high impact strength and oxygen index, but its friction coefficient and wear are still relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) According to polyamide 6 resin: 55% (weight), 3-5mm E glass fiber: 15% (weight), polytetrafluoroethylene: 7% (weight), POE-g-MAH: 3.5% (weight) ;Graphite: 3.5% by weight, decabromodiphenyl ether: 10% by weight, antimony trioxide: 3% by weight, ethoxylated alkylamine: 2% by weight, antioxidant 1010 : 0.5% (weight), silane coupling agent: 0.5% (weight) batching; 2) high-speed mixing for 0.5 hours, rotating speed is 300~600 rev / min mixing; 3) the temperature of the twin-screw extruder is controlled at 190~ Mix and extrude at 250°C, water-cool and cut into pellets with a specification of Φ2.5×4 through a pelletizer; 4) Dry at 100°C for 3 hours.

[0017] The materials of this formula are analyzed and evaluated, and the following basic properties are obtained. Axial tensile strength: 67MPa, notched impact strength: 27.7KJ / m 2 , flame retardant performance: V-0, surface resistance: 4.2×10 8 Ω; friction coefficient: 0.08, wear rate: 5.5×10 -6 mm 3 / Nm.

Embodiment 2

[0019] 1) According to polyamide 6 resin: 58% (weight), E glass fiber of 3 ~ 5mm: 12.5% ​​(weight), polytetrafluoroethylene: 6% (weight), HDPE-g-MAH: 3.5% (weight) ; UHMWPE: 3% by weight, Decabromodiphenyl ether: 11% by weight, Antimony trioxide: 3.5% by weight, Ethoxylated alkylamine: 1.5% by weight, Antioxidant 1010: 0.5% (weight), silane coupling agent: 0.5% (weight) batching; 2) high-speed mixing for 0.5 hours, and the rotating speed is 300~600 rpm to mix evenly; 3) the temperature of the twin-screw extruder Mixing and extrusion controlled at 190-250°C, water-cooled and cut into pellets with a specification of Φ2.5×4 by a pelletizer; 4) Drying at 100°C for 3 hours.

[0020] The materials of this formula are analyzed and evaluated, and the following basic properties are obtained. Axial tensile strength: 65.3MPa, notched impact strength: 25.8KJ / m 2 , flame retardant performance: V-0, surface resistance: 4.4×10 8 Ω; friction coefficient: 0.1, wear rate: 4.5×10 -6 mm 3 / N...

Embodiment 3

[0022] 1) According to polyamide 6 resin: 65% (weight), E glass fiber of 3 ~ 5mm: 10% (weight), polytetrafluoroethylene: 3.5% (weight), HDPE-g-MAH: 2% (weight) , ultra-high molecular weight polyethylene: 3.5% (weight), graphite: 3.5% (weight), tetradecabromodiphenoxybenzene: 8.5% (weight), antimony trioxide: 2.5% (weight), ethoxy Alkylamine: 0.8% (weight), antioxidant 1010: 0.2% (weight), silane coupling agent: 0.5% (weight) ingredients; 2) high-speed mixing for 0.5 hours, the rotating speed is 300~600 rev / min mixing Uniform; 3) The temperature of the twin-screw extruder is controlled at 190-250°C for mixing and extrusion, water-cooled and cut into pellets with a specification of Φ2.5×4 by a pelletizer; 4) Drying at 100°C for 3 hours.

[0023] The materials of this formula are analyzed and evaluated, and the following basic properties are obtained. Axial tensile strength: 63.5MPa, notched impact strength: 27.8KJ / m 2 , flame retardant performance: V-0, surface resistance: 4.0...

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Abstract

The invention discloses a high performance polyamide 6 based friction material and a preparation method thereof. The friction material comprises the following components in percentage by weight: 55 to 65% of polyamide 6, 10 to 15% of chopped glass fiber, 10 to 15% of composite solid lubricant, 2 to 5% of compatibilizer, 10 to 15% of flame retardant, 0.5 to 2% of antistatic agent, 0.05 to 0.5% of anti-aging agent, and 0.5 to 1% of silane coupling agent. The friction material is prepared by the following steps: mixing all materials together according to the ratio mentioned above, and making the mixture into a high performance polyamide 6 based friction material through a fusion method. The friction material has the advantages of simple manufacturing technology, low wear rate, low friction coefficient, high strength, flame resistance, electrostatic resistance, high / low temperature resistance, corrosion resistance, aging resistance, and low cost.

Description

technical field [0001] The invention relates to the field of polymer material modification, in particular to a high-performance polyamide 6-based friction material and a preparation method thereof. Background technique [0002] Polyamide 6 has the characteristics of high mechanical strength, good toughness, excellent electrical properties, shock resistance and sound absorption, resistance to weak acids and bases and some organic solvents, excellent self-lubricating properties, and easy molding and processing. It is widely used in the manufacture of bearings, gears, and cams in industrial production. , Various rollers, pulleys and other friction components. However, its poor dimensional stability, high water absorption, high friction coefficient during dry friction, thermal and mechanical properties are not enough to cope with high-speed friction and other shortcomings, so its application is still limited. [0003] In recent years, the addition of fibers and inorganic partic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L27/18C08L51/06C08L23/06C08K13/04C08K7/14C08K5/06C08K3/04C08K3/22C08K5/134C08K5/17
CPCC08L77/02C08L2201/02C08L2201/04C08L2201/08C08L2205/03C08L2205/035C08L2207/068C08L27/18C08L51/06C08K13/04C08K7/14C08K5/06C08K3/04C08K3/2279C08K5/1345C08L23/06C08K5/17
Inventor 李笃信游一兰司高杰
Owner CENT SOUTH UNIV
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