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Multilayer thermally restorable article, wire splice and wiring harness

一种热复原、物品的技术，应用在管状物品、分层产品、合成树脂层状产品等方向，能够解决聚氯乙烯层劣化等问题，达到抑制劣化的效果

Active Publication Date: 2015-08-26
SUMITOMO ELECTRIC IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the case where a multilayer heat-recoverable article is bonded to a PVC insulated wire, there is a problem that the polyvinyl chloride layer may deteriorate depending on the type of the multilayer heat-recoverable article such as the composition of the adhesive layer

Method used

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  • Multilayer thermally restorable article, wire splice and wiring harness
  • Multilayer thermally restorable article, wire splice and wiring harness
  • Multilayer thermally restorable article, wire splice and wiring harness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～16 and comparative example 1～4

[0095] (Manufacturing of multi-layer heat-recoverable items)

[0096] After preparing the pressure-sensitive adhesive composition for the pressure-sensitive adhesive layer and the base material layer resin composition for the base material layer, each multilayer heat-recoverable article was produced by the following production method I or production method II.

[0097] Various adhesive compositions were prepared by melt-blending the thermoplastic resin [A] and the viscosity property modifier [B] with the composition ratios shown in Table I. The compounds used to prepare the adhesive compositions are shown in Table II.

[0098] A substrate layer resin composition was prepared by melt-blending additives to polyethylene having a melting point of 125°C.

[0099] Two types of substrate layer resin compositions (substrate layer resin composition I and substrate layer resin composition II) containing different amounts of additives were prepared. A substrate layer resin composition ...

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Abstract

Provided are: a multilayer thermally restorable article which is capable of suppressing deterioration of a PVC insulated wire and outflow of an adhesive layer, and which is suitable for adequate protection of the PVC insulated wire; and a wire splice and a wiring harness, each of which uses this multilayer thermally restorable article. The present invention is a multilayer thermally restorable article (1) which is provided with a base layer (10) and an adhesive layer (11) that is laminated on the inner surface of the base layer (10). The adhesive layer (11) does not flow at a temperature of 135°C, and contains a thermoplastic resin and at least one viscosity characteristics-modifying agent that is selected from the group consisting of silica, organic-treated layered silicates and deterioration inhibitors. In cases where an insulated wire, which has a conductor and a polyvinyl chloride layer laminated on the outer circumference of the conductor, is covered with the multilayer thermally restorable article (1), no cracks occur in the polyvinyl chloride layer under heating conditions of 135°C and 200 hours.

Description

technical field [0001] The present invention relates to a multilayer heat-recoverable article, wiring and wire harness having an adhesive layer disposed on the inner side of a substrate layer. Background technique [0002] Heat-recoverable items such as heat-shrinkable tubes and heat-shrinkable caps are used as coverings for joints between insulated wires, wire terminals, and metal pipes for waterproofing, corrosion protection, and the like. For example, when a joint between insulated wires is covered with a heat-shrinkable tube and heated, the heat-shrinkable tube shrinks, conforms to the shape of the joint, and adheres thereto, thereby protecting the joint. [0003] Examples of such heat-recoverable articles include multilayer heat-recoverable articles in which an adhesive layer is provided on the inner surface of a heat-shrinkable base material layer (refer to Japanese Patent Laid-Open No. 2000-129042 Bulletin). As the adhesive layer, a hot-melt adhesive such as ethylen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B7/12B32B1/08C09J7/02H01B7/00H01B17/58C09J7/20
CPCC09J2205/102B32B27/32B32B2307/736B32B2307/206C08K3/346B32B27/34B32B27/304B32B27/36C09J7/02B32B1/08B32B7/12B32B2307/7265C08K3/36B32B27/06H02G15/1806C09J2203/302B32B2597/00C08K9/04C09J7/20Y10T428/1393C09J2301/408H01B7/0045B32B27/08B32B2457/04B32B2250/02B32B2250/24B32B2307/306
Inventor 山崎智西川信也藤田龙平江本安隆
Owner SUMITOMO ELECTRIC IND LTD
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