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Heat-shrinkage-resistant sealing ring and preparation method thereof

A heat-shrinkable sealing and rubber technology, which is applied in fiber types, textiles and papermaking, fiber processing, etc., can solve the problem that the performance of heat shrinkage resistance of seals is difficult to meet production requirements, and achieve excellent shrinkage resistance and excellent heat shrinkage resistance Performance and mechanical properties, excellent shrinkage resistance and mechanical properties

Inactive Publication Date: 2020-05-08
河北新尔特橡塑密封有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, seals can be divided into NBR nitrile rubber seal rings, HNBR hydrogenated nitrile rubber seal rings, FLS fluorosilicone rubber seal rings, CR neoprene rubber seal rings, etc., although the above seals can basically meet production needs. , but in some specific environments, the heat shrinkage resistance of the seal is difficult to meet the production requirements

Method used

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  • Heat-shrinkage-resistant sealing ring and preparation method thereof

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preparation example Construction

[0034] The modified fiber is used to improve the dimensional stability of the sealing ring and to improve the shrinkage resistance of the sealing ring. Preferably, the parts by weight of the modified fibers are 10-15 parts; more preferably, the parts by weight of the modified fibers are 12-13 parts. In an embodiment of the present invention, the modified fiber has a diameter of 10-41 μm and a length of 5-6 mm. Wherein, the modified fiber is a titanate-modified polypropylene fiber; the preparation method of the titanate-modified polypropylene fiber comprises the following steps: Add ester to dimethylacetamide solvent, stir evenly, add polypropylene fiber, soak at 40-50°C for 10-15h, and then dry at room temperature to obtain isopropyl tri(dioctyl coke Phosphate acyloxy) titanate modified polypropylene fiber.

[0035] Double-ended vinyl silicone oil is used to improve the toughness of rubber and improve the sealing performance of sealing rings. Preferably, the weight part of ...

Embodiment 1

[0046] The modified fiber is a titanate-modified polypropylene fiber, and the preparation method of the titanate-modified polypropylene fiber comprises the following steps:

[0047] Add isopropyl tris(dioctyl pyrophosphate acyloxy) titanate to dimethylacetamide solvent, stir evenly, add polypropylene fiber, soak at 40°C for 15h, and then dry at room temperature Dry, obtain diameter be 10 μ m, the polypropylene fiber that length is the isopropyl tris (dioctyl pyrophosphate acyloxy) titanate modification of 5mm; The weight-average molecular weight of polypropylene fiber is 50000;

[0048] The mass ratio of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate to polypropylene fiber is 0.1:1.

Embodiment 2

[0050] The modified fiber is a titanate-modified polypropylene fiber, and the preparation method of the titanate-modified polypropylene fiber comprises the following steps:

[0051] Add isopropyl tris(dioctyl pyrophosphate acyloxy) titanate to dimethylacetamide solvent, stir evenly, add polypropylene fiber, soak at 50°C for 10h, and then dry at room temperature Dry to obtain a diameter of 41 μm, a length of 6 mm isopropyl tris (dioctyl pyrophosphate acyloxy) titanate modified polypropylene fibers; the weight average molecular weight of the polypropylene fibers is 100,000;

[0052] The mass ratio of isopropyl tris(dioctyl pyrophosphate acyloxy) titanate to polypropylene fiber is 0.2:1.

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Abstract

The invention provides a heat-shrinkage-resistant sealing ring and a preparation method thereof. Fluoroether rubber and polyacrylate rubber are adopted as main materials and have excellent high-temperature resistance and aging resistance, so that the sealing ring has good high-temperature resistance, and it can be guaranteed that the sealing ring still has good mechanical properties after being subjected to high-temperature treatment; sodium gluconate can improve the size stability of the sealing ring; a modified fiber is used for improving the dimensional stability of the sealing ring and improving the shrinkage resistance of the sealing ring; double-vinyl-terminated silicone oil is used for improving the toughness of the rubber and improving the sealing performance of the sealing ring; and polyallylamine hydrochloride can improve the mechanical stability of the sealing ring, so that the sealing ring has excellent shrinkage resistance. Experimental results show that the heat-resistantand oil-resistant sealing ring has excellent shrinkage resistance, mechanical properties and the like. The preparation method is simple, and the prepared heat-shrinkage-resistant sealing ring has excellent heat shrinkage resistance and mechanical properties.

Description

technical field [0001] The invention belongs to the field of sealing rings, in particular to a heat-shrinkable sealing ring and a preparation method thereof. Background technique [0002] The seal is generally composed of a moving ring, a static ring and a sealing ring; the sealing ring plays a vital role in the sealing effect of the seal. The sealing ring is used in various industries, and it is fixed in the gap to form an elastic barrier, which plays the role of barrier and seal. The sealing ring generally meets the following conditions: high elasticity and resilience; appropriate mechanical strength, including expansion strength, elongation and tear strength, etc.; stable, not easy to swell in the medium, and small thermal shrinkage effect (Joule effect) ; Easy to process and shape, and can maintain precise dimensions; no corrosion of the contact surface, no pollution of the medium, etc. [0003] At present, seals can be divided into NBR nitrile rubber seal rings, HNBR ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L33/04C08L23/12C08L39/00C08K13/02C08K5/098C08K3/26C08K3/04C08K3/40D06M13/503D06M101/20
CPCC08L27/18D06M13/503C08L2205/035C08L2205/16C08L2201/08C08K2003/265D06M2101/20C08L33/04C08L23/12C08L39/00C08L83/04C08K13/02C08K5/098C08K3/26C08K3/04C08K3/40
Inventor 宋增胜任晓龙孟令彦马丽霞张雨苏金龙宋金环侯敏苏俊英闫婷婷
Owner 河北新尔特橡塑密封有限公司
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