Heat-shrinkable tube having tearability
AssigneeJunkosha Inc.
InventorsMasahiro Suzuki, Kohei Yuri, Tomoyo Okubo
Life of this patent
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Abstract
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 μm or less, and has excellent tear straightness and high heat-shrinkability.
Claims6
A heat-shrinkable tube having tearability, comprising:
- (a) a base resin, comprising a copolymer comprising at least tetrafluoroethylene and hexafluoropropylene as constituent monomers, and (b) a resin other than the base resin, comprising a copolymer comprising at least tetrafluoroethylene and hexafluoropropylene as constituent monomers, wherein a thickness of an entanglement unit of a polymer observed at a cross-section in a longitudinal direction of the tube is from above 0 μm to 9 μm, and wherein the tube has a heat-shrinkage rate of 48% or more when being heated to 200° C. for 20 minutes.
A heat-shrinkable tube having tearability, comprising:
- (a) a base resin, comprising a copolymer comprising at least tetrafluoroethylene and hexafluoropropylene as constituent monomers, and (b) a resin other than the base resin, comprising a copolymer comprising at least tetrafluoroethylene and hexafluoropropylene as constituent monomers, wherein a thickness of an entanglement unit of a polymer observed at a cross-section in a longitudinal direction of the tube is from above 0 μm to 9 μm, and wherein the tube has a heat-shrinkage rate of 38% or more when being heated to 160° C. for 5 minutes.
Dependencies are inferred from the claim text.