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
CN102729481AActive Publication Date: 2012-10-17SICHUAN JUST RUBBER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN JUST RUBBER
Publication Date
2012-10-17

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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.
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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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