Thermal setted coextruded heat shrinkable sleeving and method for producing same

A technology of heat shrinkable sleeve and manufacturing method, which can be applied to insulators, electrical components, circuits, etc., and can solve problems such as reliability reduction, sealing failure, vibration shedding, etc.

Active Publication Date: 2012-10-03
深圳市博赛新材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] At present, there are no research and development reports on thermosetting composite heat-shrinkable sleeves at home and abroad. Although there are thermosetting hot-melt adhesive products on the market, such as: reactive polyurethane hot-melt adhesives, reactive epoxy resin hot-melt adhesives, etc., but There are safety and quality problems such as sealing failure, insulation drop, vibration shedding, and reliability reduction of the covered object as the ambient temperature rises, and it cannot be used in the special production process of heat-shrinkable double-wall casing. Its application has great limitations

Method used

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  • Thermal setted coextruded heat shrinkable sleeving and method for producing same

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Embodiment Construction

[0012] Specific embodiments of the present invention are described with reference to the above drawings.

[0013] Depend on figure 1 It can be seen from the figure that this thermosetting composite heat-shrinkable sleeve includes a reactive hot-melt adhesive layer 10 in the inner layer, and the outer layer is a heat-shrinkable layer 20 whose main material is thermoplastic polyolefin, and the main material is thermoplastic The components of the polyolefin heat-shrinkable layer 20 are proportioned by volume: 55-80 parts of low-density or medium-density polyethylene; 15-30 parts of modified materials; 5-15 parts of additives.

[0014] Among them, the components of 15-30 parts of the modified material are distributed according to the volume ratio of 5-10 parts of EPDM rubber and 10-20 parts of polyolefin elastomer. The index of polyolefin elastomer is: the melt index is 1.5-5.0, The VA content is 14-28%.

[0015] The auxiliary agent is carbon black, flame retardant, sensitizer, ...

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Abstract

A thermal setted coextruded heat shrinkable sleeving comprises a reaction type hot melting adhesive inner layer (10), wherein an outer layer is a thermal shrinkage layer (20) which takes thermoplastics type polyolefin as a main material. The reaction type hot melting adhesive inner layer and the thermal shrinkage outer layer are coextruded into a composite sleeving, a high-energy electron accelerator is used to irradiate the sleeving, only the material of the outer layer is controlled for cross bonding, and the material of the inner layer is not cross bonded. The thermal setted coextruded heat shrinkable sleeving in the invention can completely substitute a common hotmelt double-walled heat-shrinkable sleeving under high temperature, high humidity, acid, alkali and other special working environments, so the insulation, sealing, moistureproof and shockproof effects are improved, moreover, the special materials of the inner layer and the outer layer belong to environmental protection materials, and the harmful substances and heavy metal control provisions of the Restriction of the use of Certain Hazardous Substances in Electrical and Electronic Equipment (ROSH) of the European union are satisfied.

Description

technical field [0001] The present invention relates to insulating materials, in particular to insulating materials used for insulating and sealing electrical joints. Background technique [0002] At present, there are no research and development reports on thermosetting composite heat-shrinkable sleeves at home and abroad. Although there are thermosetting hot-melt adhesive products on the market, such as: reactive polyurethane hot-melt adhesives, reactive epoxy resin hot-melt adhesives, etc., but There are safety and quality problems such as sealing failure, insulation drop, vibration shedding, and reliability reduction of the covered object as the ambient temperature rises, and it cannot be used in the special production process of heat-shrinkable double-wall casing. Its application has Great limitations. Contents of the invention [0003] In order to solve the above-mentioned technical problems, the present invention provides a thermosetting composite heat-shrinkable s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B17/58H01B17/60H01R4/72H01B19/00C08L23/06C08L23/16C08L23/00C08K3/04C08K3/22C08J3/28C08J3/24
Inventor 马玉珍周顺武严达刘军
Owner 深圳市博赛新材有限公司
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