Heat-Shrinkable Tube Having Tearability

• US 20160317716A1
• Filed: 07/08/2016
• Published: 11/03/2016
• Est. Priority Date: 11/21/2011
• Status: Active Grant

• Current Assignee: Junkosha Inc.
• Original Assignee: Junkosha Inc.
• Inventors: Suzuki, Masahiro, Yuri, Kohei, Miyoshi, Masaru
• Granted Patent: US 9,623,154 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61L 2400/00 Materials characterised by their function or physical properties
• CPC Class Codes: A61L 29/041 obtained by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 29/049 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 29/085 Macromolecular materials
• CPC Class Codes: A61L 29/14 Materials characterised by their function or physical properties , e.g. lubricating compositions
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene
• CPC Class Codes: Y10T 428/1331 Single layer [continuous layer]

Abstract

An object of the present invention is to provide a tube which can be easily torn and has a large heat-shrinkability at a low temperature. The tube of the present invention is a heat-shrinkable tube having tearability, including a mixture of a fluorine resin and a different kind of resin from the fluorine resin, in which an amount of change in loss energy, ΔE loss, with change in temperature from 175° C. to 185° C. is a positive value.

Claims

1. A heat-shrinkable tube having tearability, comprising at least a fluorine resin,

wherein when a sine vibration stress with a cycle of 30 sec and an amplitude of 10 g is applied and a temperature is raised at rate of 5°

C./min, an amount of change in loss energy, Δ

E loss, with change in temperature from 175°

C. to 185°

C. is a positive value.

2. The heat-shrinkable tube having tearability of claim 1, wherein a storage elastic modulus at 50°

C. is 100 MPa or less.

3. The heat-shrinkable tube having tearability of claim 1, wherein the fluorine resin contains at least a tetrafluoroethylene and a hexafluoropropylene as constituent monomer units.

4. The heat-shrinkable tube having tearability of claim 1, wherein the fluorine resin is a polymer made of at least three kinds of monomers and contains at least a tetrafluoroethylene and a hexafluoropropylene as constituent monomer units.

5. The heat-shrinkable tube having tearability of claim 1, wherein the fluorine resin contains at least a tetrafluoroethylene, a hexafluoropropylene and a perfluoroalkylvinyl ether as constituent monomer units.

6. The heat-shrinkable tube having tearability of claim 1, wherein the fluorine resin contains at least a tetrafluoroethylene, a hexafluoropropylene and a vinylidene fluoride as constituent monomer units.

7. The heat-shrinkable tube having tearability of claim 6, wherein the fluorine resin has a glass transition temperature of 40°

C. or higher.