Multilayered heat-recoverable article, wire splice, and wire harness

Patent metadata

Field	Value
Publication number	US-9525281-B2
Application number	US-201314652523-A
Country	US
Kind code	B2
Filing date	Sep 18, 2013
Priority date	Dec 20, 2012
Publication date	Dec 20, 2016
Grant date	Dec 20, 2016

Abstract

A multilayered heat-recoverable article 1 includes a base material layer 10 and an adhesive layer 11 disposed on an inner side of the base material layer 10 . The adhesive layer 11 does not flow at a temperature of 135° C. and includes a thermoplastic resin and a viscosity characteristics modifier composed of at least one selected from the group consisting of silica, an organically treated layered silicate, and a deterioration inhibitor. In the case where the multilayered heat-recoverable article 1 is used to cover an insulated electrical wire which includes a conductor and a polyvinyl chloride layer provided on the outer periphery thereof, cracks do not occur in the polyvinyl chloride layer under heating conditions at 135° C. for 200 hours.

First claim

The invention claimed is:

1. A multilayered heat-recoverable article comprising a base material layer and an adhesive layer disposed on an inner side of the base material layer,
wherein the adhesive layer does not flow at a temperature of 135° C. and includes [A] a thermoplastic resin and [B] a viscosity characteristics modifier composed of an organically treated layered silicate, and a deterioration inhibitor; and
in the case where the multilayered heat-recoverable article is used to cover an insulated electrical wire which includes a conductor and a polyvinyl chloride layer provided on the outer periphery thereof, cracks do not occur in the polyvinyl chloride layer under heating conditions at 135° C. for 200 hours,
wherein the deterioration inhibitor is at least one selected from the group consisting of activated clay and hydrotalcite.

2. The multilayered heat-recoverable article according to claim 1 , wherein the viscosity characteristics modifier [B] is composed of silica, the organically treated layered silicate, and the deterioration inhibitor.

3. The multilayered heat-recoverable article according to claim 1 , wherein cracks do not occur in the polyvinyl chloride layer under heating conditions at 150° C. for 200 hours.

4. The multilayered heat-recoverable article according to claim 1 , wherein the thermoplastic resin [A] is at least one selected from the group consisting of an ethylene-vinyl acetate copolymer and a polyamide.

5. The multilayered heat-recoverable article according to claim 1 , wherein the base material layer includes at least one selected from the group consisting of a polyethylene, a polyester, a polyamide, and a fluororesin.

6. A wire splice comprising:
a plurality of wires, each including a conductor and a polyvinyl chloride layer provided on the outside thereof; and
a multilayered heat-recoverable article made to adhere to a joint in which the conductors of the plurality of wires are connected to each other,
wherein the multilayered heat-recoverable article includes a base material layer and an adhesive layer disposed on an inner side of the base material layer, in which the adhesive layer does not flow at a temperature of 135° C. and includes [A] a thermoplastic resin and [B] a viscosity characteristics modifier composed of an organically treated layered silicate and a deterioration inhibitor; and
wherein the deterioration inhibitor is at least one selected from the group consisting of activated clay and hydrotalcite.

7. A wire harness comprising:
a plurality of wires, each including a conductor and a polyvinyl chloride layer provided on the outside thereof; and
a multilayered heat-recoverable article made to adhere to the plurality of wires,
wherein the multilayered heat-recoverable article includes a base material layer and an adhesive layer disposed on an inner side of the base material layer, in which the adhesive layer does not flow at a temperature of 135° C. and includes [A] a thermoplastic resin and [B] a viscosity characteristics modifier composed of an organically treated layered silicate and a deterioration inhibitor; and
wherein the deterioration inhibitor is at least one selected from the group consisting of activated clay and hydrotalcite.

Assignees

• Sumitomo Electric Industries
• Sumitomo Electric Fine Polymer Inc

Inventors

• Yamasaki Satoshi
• Nishikawa Shinya
• Fujita Ryouhei
• Emoto Yasutaka

Classifications

• C08K3/36

  Silica · CPC title

• B32B2307/206

  Insulating · CPC title

• B32B27/36

  comprising polyesters · CPC title

• C09J7/02

  Chemistry & Metallurgy · mapped topic

• B32B2457/04

  Insulators · CPC title