Composite rubber film for pipe sealing rings and preparation method thereof

A compound rubber and pipeline sealing technology, applied in the polymer field, can solve the problems of difficult installation, large compression set, and larger size of the sealing ring, so as to reduce the possibility of mechanical damage, small compression set, and mechanical strength. big effect

Active Publication Date: 2012-10-17
SICHUAN JUST RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the sealing rings of pipelines are rubber sealing rings. The sealing principle is that the sealing ring can be tightly set on the outer diameter of the pipe interface through the elasticity and stretchability of rubber to achieve the sealing of the pipeline. However, the rubber sealing rings currently used The material is a single type of rubber, mostly styrene-butadiene rubber (SBR) and natural rubber (NR). The main performance characteristics of this type of rubber material are chemical instability and large compression permanent deformation. The prepared rubber sealing ring The service life is short, and at the same time, the mechanical damage to the sealing ring caused by improper installation method also reduces the service life of the sealing ring
Compression permanent deformation and mechanical damage during installation may cause poor sealing of the pipeline and leakage
When the sealing ring is installed on a large-diameter pipeline, due to the large diameter of the pipeline, the specification of the sealing ring will also increase accordingly, which brings certain difficulties to the installation, and the installation is difficult, and it is more likely to cause mechanical damage and leakage during installation.

Method used

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  • Composite rubber film for pipe sealing rings and preparation method thereof
  • Composite rubber film for pipe sealing rings and preparation method thereof
  • Composite rubber film for pipe sealing rings and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] see figure 1 , add natural rubber in A material storage box 2, add the mass percentage content and be 75% acrylic acid and 25% natural rubber in B material storage box 4, control the extrusion of A preforming machine 1 and B preforming machine 3 The output speed is 50r / min, the temperature of the head of A preforming machine 1 is controlled at 50°C, the temperature of the head of B preforming machine 3 is controlled at 60°C, and the A preforming machine 1 extrudes 600mm wide and 10-15mm thick Elastic rubber film 5, B preforming machine 3 extrudes a water-swellable material film 6 with a width of 600mm and a thickness of 10-15mm, and then places the extruded film on two conveyor belts, and the conveying speed of the conveyor belt matches the preforming The extrusion speed of the machine. The elastic rubber film 5 on the conveyor belt and the water-swellable material film 6 are pasted together by hand, and then put into the bonding roller 8 for heat vulcanization and pr...

Embodiment 2

[0022] see figure 1 , add natural rubber in A material storage box 2, add mass percentage content to be 68% methacrylic acid and 32% natural rubber in B material storage box 4, control A preforming machine 1 and B preforming machine 3 The extrusion speed is 50r / min, the head temperature of A preforming machine 1 is controlled at 55°C, the head temperature of B preforming machine 3 is controlled at 65°C, and the A preforming machine 1 extrudes a width of 600mm and a thickness of 10- 15mm elastic rubber film 5, B preforming machine 3 extrudes a water-swellable material film 6 with a width of 600mm and a thickness of 10-15mm, and then places the extruded film on two conveyor belts, and the conveying speed of the conveyor belt matches The extrusion speed of the preformer. The elastic rubber film 5 on the conveyor belt and the water-swellable material film 6 are pasted together by hand, and then put into the bonding roller 8 for heat vulcanization and pressing to form a composite ...

Embodiment 3

[0024] see figure 1 , add natural rubber in A material storage box 2, add mass percent acrylamide and 30% natural rubber in B material storage box 4, control A preforming machine 1 and B preforming machine 3 The extrusion speed is 55r / min, the head temperature of A preforming machine 1 is controlled at 60°C, the temperature of the head of B preforming machine 3 is controlled at 65°C, and the extrusion width of A preforming machine 1 is 600mm and the thickness is 10-15mm. The elastic rubber film 5, the B preforming machine 3 extrudes the water-swellable material film 6 with a width of 600 mm and a thickness of 10-15 mm, and then places the extruded films on two conveyor belts respectively. The extrusion speed of the molding machine. The elastic rubber film 5 on the conveyor belt and the water-swellable material film 6 are pasted together by hand, and then put into the bonding roller 8 for heat vulcanization and pressing to form a composite rubber film 7. The rotating speed ma...

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PUM

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Abstract

The invention discloses a composite rubber film for pipe sealing rings, comprising an elastic rubber film and a water-swelling material film, which are tightly adhered with each other. The composite rubber film is small in compression set; and pipe sealing rings manufactured by using the composite rubber film are long in service life, simple and convenient for mounting and lasting and excellent in sealing property. At the same time, the invention discloses a preparation method of the composite rubber film, comprising the steps of: respectively extruding the elastic rubber film and the water-swelling material film by using a pre-forming machine; and carrying out heat vulcanization on the two films through an adhesion roll to tightly adhere the films together so as to form the composite rubber film.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a composite rubber film for a pipeline sealing ring and a preparation method thereof. Background technique [0002] In order to prevent pipeline leakage, a sealing ring must be installed at the pipeline interface to reduce the leakage rate of the pipeline. At present, the sealing rings of pipelines are rubber sealing rings. The sealing principle is that the sealing ring can be tightly set on the outer diameter of the pipe interface through the elasticity and stretchability of rubber to achieve the sealing of the pipeline. However, the rubber sealing rings currently used The material is a single type of rubber, mostly styrene-butadiene rubber (SBR) and natural rubber (NR). The main performance characteristics of this type of rubber material are chemical instability and large compression permanent deformation. The prepared rubber sealing ring The service life is short, and at the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C47/00B29C35/02B29C65/02C08L75/04C08L7/00C08L1/08C08K5/09C08K5/20
Inventor 陈克辉严林岳清
Owner SICHUAN JUST RUBBER
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