Nylon 6 composition with excellent wear resistance and preparation method of nylon 6 composition

Abstract

The invention provides nylon 6 composition with excellent wear resistance and a preparation method of the nylon 6 composition. 100 parts of nylon 6, 1-5 parts of a wear-resistant agent, 0.5-1 part ofDIDP (di-iso-decyl phthalate) (which is 0 when not added), 0.5-2 parts of a silane coupling agent and 0.1-1 part of an antioxidant are added to a mixer to be stirred for 30-40 s at normal temperatureat low speed, and the obtained mixture after uniform mixing is added to a twin-screw extruder; granulation is performed after melt extrusion, and the nylon 6 composition with excellent wear resistanceis prepared. The used wear-resistant agent has a better wear-resistant effect than single wollastonite and alumina and excellent wear-resistant effect than common molybdenum disulfide, polytetrafluoroethylene and graphite wear-resistant agents in the market.

Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a nylon 6 composition with excellent wear resistance and a preparation method thereof. Background technique

[0002] Nylon (Nylon) is a general term for polymers containing amide groups in the repeating unit of the macromolecular main chain. Nylon can be obtained by ring-opening polymerization of lactam amines, or by polycondensation of dibasic amines and dibasic acids. It was the DuPont company of the United States that first developed the resin for fiber, and it was industrialized in 1939. In the 1950s, the development and production of injection molding products began to replace metals to meet the requirements of lightweight and cost-reducing downstream industrial products. PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, low friction coefficient, certain fl...

Examples

Embodiment 1

[0041] The anti-wear agent used is a compound of wollastonite and alumina in a weight ratio of 1:4. The aspect ratio of wollastonite is 20:

[0042] 1. The average particle diameter is 5 μm; the average particle diameter of alumina is 3 μm.

[0043] Add 6100 parts of nylon, 2.5 parts of anti-wear agent, 1 part of silane coupling agent, and 0.6 part of antioxidant into the mixer at room temperature and low speed and stir for 38 seconds. After mixing evenly, add it to the twin-screw extruder; After being granulated, a nylon 6 composition with excellent wear resistance is obtained.

[0044] The low-speed stirring speed of the mixer is 100 rpm; the temperature of the first zone of the twin-screw extruder is 180°C, the temperature of the second zone is 220°C, the temperature of the third zone is 230°C, the temperature of the fourth zone is 240°C, and the temperature of the fifth zone is 250°C, the temperature in the sixth zone is 260°C; the speed of the twin-screw main engine is ...

Embodiment 2

[0077] The anti-wear agent used is a compound of wollastonite and alumina in a weight ratio of 1:4. The aspect ratio of wollastonite is 20:

[0078] 1. The average particle diameter is 5 μm; the average particle diameter of alumina is 3 μm.

[0079] Add 100 parts of nylon 6, 5 parts of anti-wear agent, 1.5 parts of silane coupling agent, and 1 part of antioxidant into the mixer at room temperature and low speed and stir for 40 seconds. After mixing evenly, add it to the twin-screw extruder; Granulating after extrusion to prepare a nylon 6 composition with excellent wear resistance.

[0080] The low-speed stirring speed of the mixer is 120 rpm; the temperature of the first zone of the twin-screw extruder is 200°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, and the temperature of the fifth zone is 260°C, the temperature in the sixth zone is 260°C; the speed of the twin-screw main engine ...

Embodiment 3

[0082] The aspect ratio of wollastonite used is 20:1, the average particle diameter is 5 μm; the average particle diameter of alumina is 3 μm.

[0083] Anti-wear agent treatment method: compound wollastonite and alumina at a weight ratio of 1:4, then put it into stearic acid ethanol solution, and obtain it after ultrasonic reflux at 40°C for 1.5 hours and then dry; the weight of stearic acid and ethanol The ratio is 1:9.

[0084] Add 100 parts of nylon 6, 5 parts of anti-wear agent, 1.5 parts of silane coupling agent, and 1 part of antioxidant into the mixer at room temperature and low speed and stir for 40 seconds. After mixing evenly, add it to the twin-screw extruder; Granulating after extrusion to prepare a nylon 6 composition with excellent wear resistance.

[0085] The low-speed stirring speed of the mixer is 120 rpm; the temperature of the first zone of the twin-screw extruder is 200°C, the temperature of the second zone is 230°C, the temperature of the third zone is 2...

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a nylon 6 composition with excellent wear resistance and a preparation method thereof. Background technique

[0002] Nylon (Nylon) is a general term for polymers containing amide groups in the repeating unit of the macromolecular main chain. Nylon can be obtained by ring-opening polymerization of lactam amines, or by polycondensation of dibasic amines and dibasic acids. It was the DuPont company of the United States that first developed the resin for fiber, and it was industrialized in 1939. In the 1950s, the development and production of injection molding products began to replace metals to meet the requirements of lightweight and cost-reducing downstream industrial products. PA has good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubricating properties, low friction coefficient, certain fl...

Examples

Embodiment 1

[0041] The anti-wear agent used is a compound of wollastonite and alumina in a weight ratio of 1:4. The aspect ratio of wollastonite is 20:

[0042] 1. The average particle diameter is 5 μm; the average particle diameter of alumina is 3 μm.

[0043] Add 6100 parts of nylon, 2.5 parts of anti-wear agent, 1 part of silane coupling agent, and 0.6 part of antioxidant into the mixer at room temperature and low speed and stir for 38 seconds. After mixing evenly, add it to the twin-screw extruder; After being granulated, a nylon 6 composition with excellent wear resistance is obtained.

[0044] The low-speed stirring speed of the mixer is 100 rpm; the temperature of the first zone of the twin-screw extruder is 180°C, the temperature of the second zone is 220°C, the temperature of the third zone is 230°C, the temperature of the fourth zone is 240°C, and the temperature of the fifth zone is 250°C, the temperature in the sixth zone is 260°C; the speed of the twin-screw main engine is ...

Embodiment 2

[0077] The anti-wear agent used is a compound of wollastonite and alumina in a weight ratio of 1:4. The aspect ratio of wollastonite is 20:

[0078] 1. The average particle diameter is 5 μm; the average particle diameter of alumina is 3 μm.

[0079] Add 100 parts of nylon 6, 5 parts of anti-wear agent, 1.5 parts of silane coupling agent, and 1 part of antioxidant into the mixer at room temperature and low speed and stir for 40 seconds. After mixing evenly, add it to the twin-screw extruder; Granulating after extrusion to prepare a nylon 6 composition with excellent wear resistance.

[0080] The low-speed stirring speed of the mixer is 120 rpm; the temperature of the first zone of the twin-screw extruder is 200°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, and the temperature of the fifth zone is 260°C, the temperature in the sixth zone is 260°C; the speed of the twin-screw main engine ...

Embodiment 3

[0082] The aspect ratio of wollastonite used is 20:1, the average particle diameter is 5 μm; the average particle diameter of alumina is 3 μm.

[0083] Anti-wear agent treatment method: compound wollastonite and alumina at a weight ratio of 1:4, then put it into stearic acid ethanol solution, and obtain it after ultrasonic reflux at 40°C for 1.5 hours and then dry; the weight of stearic acid and ethanol The ratio is 1:9.

[0084] Add 100 parts of nylon 6, 5 parts of anti-wear agent, 1.5 parts of silane coupling agent, and 1 part of antioxidant into the mixer at room temperature and low speed and stir for 40 seconds. After mixing evenly, add it to the twin-screw extruder; Granulating after extrusion to prepare a nylon 6 composition with excellent wear resistance.

[0085] The low-speed stirring speed of the mixer is 120 rpm; the temperature of the first zone of the twin-screw extruder is 200°C, the temperature of the second zone is 230°C, the temperature of the third zone is 2...

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