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A kind of aramid fiber pressing ring and preparation method thereof

A technology for pressing rings and aramid fibers, which is applied in the field of composite materials, can solve the problems of harsh use environment, high material requirements, and high pressure resistance that cannot meet the performance requirements of aramid fiber pressing rings, so as to achieve strong adhesion and improve compression resistance sexual effect

Active Publication Date: 2022-05-03
宁波德固赛密封科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, nitrile rubber is a general-purpose oil-resistant rubber, but the high-pressure resistance of ordinary nitrile rubber is still difficult to meet the performance requirements of aramid pressing rings
[0004] In summary, due to the complex design and processing process of aramid pressing rings, the harsh use environment, and high requirements for materials, there are very few companies producing aramid pressing rings at home and abroad. Therefore, it is necessary to develop a product with high compression resistance. , high oil resistance aramid pressed ring products

Method used

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  • A kind of aramid fiber pressing ring and preparation method thereof

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preparation example Construction

[0053] A method for preparing an aramid pressed ring, comprising the following steps:

[0054] S1: Dip the aramid base cloth in liquid nitrile rubber, and control the impregnation rate to 5-10%.

[0055] S2: first masticating the modified nitrile rubber for 4-8 minutes, and then adding other raw materials and mixing together for 15-25 minutes to obtain a mixed rubber.

[0056] S3: scrape-coat the mixed rubber obtained in S2 on the surface of the aramid fiber base cloth obtained in S1; the scraping amount is 180-220g / m 2 .

[0057] S4: The product obtained in S3 is pre-vulcanized under pressure and heating (90-110kgf / cm 2 , 150-160°C, 500-700), secondary vulcanization (145-155°C, 50-70min). S5: Perform post-shape post-processing on the blank obtained after vulcanization to obtain a finished product.

Embodiment 1

[0059] An aramid pressed ring such as figure 1 As shown, it includes aramid base cloth 1 (4 layers) and rubber layer 2 (3 layers) laminated and bonded at intervals.

[0060] Wherein, the rubber layer is nitrile rubber, comprising the following raw materials in parts by weight: 100 parts of modified nitrile rubber (the mass ratio of butadiene and acrylonitrile is 70:30), 10 parts of liquid nitrile rubber, C5 petroleum 10 parts of resin, 5 parts of solid Marlon resin, 80 parts of white carbon black, 8 parts of barium sulfate, 5 parts of zinc oxide, 4 parts of light magnesium oxide, 0.6 parts of microcrystalline wax, 2.5 parts of polyethylene glycol, stearic acid 1 part, 0.6 part of vulcanizing agent (sulfur), 2.5 parts of anti-aging agent (RD anti-aging agent and MB anti-aging agent with a mass ratio of 1.5:1), accelerator (TMD accelerator with a mass ratio of 1.5:1:0.4, CBS accelerator agent and DM accelerator) 2.9 parts.

[0061] The preparation method of modified nitrile ru...

Embodiment 2

[0071] An aramid pressing ring comprises an aramid base cloth (4 layers) and a rubber layer (3 layers) laminated and bonded at intervals.

[0072] Wherein, the rubber layer is nitrile rubber, comprising the following raw materials in parts by weight: 90 parts of modified nitrile rubber (the mass ratio of butadiene and acrylonitrile is 75:25), 5 parts of liquid nitrile rubber, C5 petroleum 5-parts of resin, 3 parts of solid Marlon resin, 70 parts of white carbon black, 6-parts of barium sulfate, 3 parts of zinc oxide, 3 parts of light magnesium oxide, 0.4 parts of microcrystalline wax, 2 parts of polyethylene glycol, hard 0.5 part of fatty acid, 0.5 part of vulcanizing agent (sulfur), 1 part of antioxidant (RD antioxidant and MB antioxidant with a mass ratio of 1:1), accelerator (TMD accelerator with a mass ratio of 1:1:0.3, CBS accelerator and DM accelerator) 2 parts.

[0073] The preparation method of modified nitrile rubber is:

[0074] Disperse zinc chloride and 2-amino-4...

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Abstract

The invention relates to the field of composite materials, and discloses an aramid fiber pressing ring and a preparation method thereof. The invention selectively bonds and modifies nitrile rubber on an aramid fiber base cloth to obtain aramid fibers with excellent oil resistance and pressure resistance. Compression ring. The modified nitrile rubber of the present invention contains nano-silica@metal-organic framework material combined with butadiene and acrylonitrile copolymerization, which can effectively improve the compressive strength of rubber and further improve the oil resistance of rubber. In the aramid pressing ring prepared by the method of the invention, the bonding force between the aramid base cloth and the rubber layer is stronger, and the compression resistance can be further improved.

Description

technical field [0001] The invention relates to the field of composite materials, in particular to an aramid pressing ring and a preparation method thereof. Background technique [0002] Aramid pressing ring is a product made of aramid base cloth and rubber bonded to the base cloth, which is mainly used on the shaft of oil field drilling machine. Due to the special use scene of the aramid pressing ring, it needs to work continuously for 24 hours at -20--100°C, suitable for drilling fluid, acidizing fluid, pressure fluid, quartz sand, etc., and the working position is vibrated, and the plunger does reciprocating linear motion , with a maximum speed of 1m / s. Therefore, it is required to have high compressive strength (the compressive strength needs to reach at least 138MPa) and oil resistance. [0003] The research and development of aramid pressing rings includes the selection of base fabric, the development of rubber material formula, the scraping molding process of rubber...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/02C08L87/00C08L57/02C08L45/02C08L77/10C08K9/04C08K3/36C08K7/26C08K3/30C08K3/22C08K3/06C08K13/06
CPCC08L9/02C08L2205/035C08L2205/025C08K2201/011C08K2003/3045C08K2003/2296C08K2003/222C08L87/00C08L57/02C08L45/02C08L77/10C08K9/04C08K3/36C08K7/26C08K3/30C08K3/22C08K3/06C08K13/06
Inventor 俞科技陈伦平郑细来
Owner 宁波德固赛密封科技有限公司