Multi-layer compounded thermal-contraction rubber sleeve

Abstract

The invention discloses a multi-layer compounded thermal-contraction rubber sleeve which comprises a rubber sleeve body. The section of the rubber sleeve body is of an annular structure. The rubber sleeve body comprises a melt layer located on the innermost circle and a plurality of external base material layers, a melt connecting layer is arranged between every two adjacent base material layers, and each base material layer is provided with a plurality of small holes. The base material layers of radiation crosslinking polyvinyl base materials are compounded, and melt is added between the base material layers for connection, so that tight connection is guaranteed; and moreover, the holes are formed in the base material layers, the percentage of contraction is guaranteed, and after one of the compounded layers is damaged, a pipeline can still be protected by the rest of the base material layers.

Description

technical field [0001] The invention relates to a plastic product, in particular to a multi-layer composite heat-shrinkable rubber sleeve. Background technique [0002] The heat shrink sleeve is commonly known as the dead sleeve. The inner layer of the general heat shrinkable rubber sleeve is an epoxy primer coated on the surface of the steel pipe, the middle layer is a hot melt adhesive, and the outer layer is a modified radiation cross-linked polyethylene substrate. In the 1990s In the middle and late stages, the oil and gas industry began to use heat-shrinkable plastic materials, and later expanded to urban gas pipelines, tap water pipelines and other fields. At present, the equipment for producing heat-shrinkable tapes is relatively backward in technology, which affects the structure of heat-shrinkable products, affects the quality of heat-shrinkable products, and restricts the development of the industry. The heat-shrinkable products produced by the existing technology...

AI Technical Summary

Problems solved by technology

At present, the equipment for producing heat-shrinkable tapes is relatively backward in technology, which affects the structure of heat-shrinkable products, affects the quality of heat-shrinkable products, and restricts the development of the industry.

The heat-shrinkable products produced by the existing technology rely on stretching when producing PE substrates, and glue coating after radiation irradiation. Due to the low level of automation, it is impossible to form an accurate control of the shrinkage rate, the shrinkage is unstable, and the internal structure of the product is unreasonable. , resulting in a decline in product quality

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