Junkosha Inc.

Kohei Yuri

Masahiro Suzuki

Tomoyo Okubo

Masaru Miyoshi

Provided is a heat-shrinkable tube having tearability, which is made of a fluororesin, particularly, a tube having excellent tear straightness and high heat-shrinkability at low temperature. The tube is a heat-shrinkable tube having tearability, which includes, as a base resin, a copolymer including at least tetrafluoroethylene and hexafluoropropylene as constituent monomers, and as a resin other than the base resin, a copolymer including at least tetrafluoroethylene and hexafluoropropylene as constituent monomers, in which a thickness of an entanglement unit of a polymer observed at a cross-section in a longitudinal direction of the tube is 9 &#x3bc;m or less, and has excellent tear straightness and high heat-shrinkability.

Heat-shrinkable tube having tearability

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, &#x394;E loss, with change in temperature from 175&#xb0; C. to 185&#xb0; C. is a positive value.

The present disclosure relates to a heat-shrinkable tube having tearability, which is made of a fluororesin, and particularly, to a heat-shrinkable tube having excellent tear straightness. Further, the present disclosure relates to a tube having high heat-shrinkage rate at low temperature. A tube including at least a fluororesin as a base resin, in which the thickness of the entanglement unit of a polymer observed on a cross-section in a longitudinal direction of the tube after being shrunk at 200&#xb0; C. by 35% or more is 1 &#x3bc;m to 9 &#x3bc;m, has excellent tear straightness.

Growing community of inventors

Kasama, Japan

Kohei Yuri