公开(公告)号：US20230296194A1

公开(公告)日：2023-09-21

申请号：US18030008

申请日：2021-10-04

申请人： JUNKOSHA INC.

发明人： Suguru TANABE ,  Naoya YAMADA

IPC分类号： F16L11/24 ,  B29C53/58

CPC分类号： F16L11/24 ,  B29C53/58 ,  B29K2027/18

摘要： The present invention relates to a tube comprising polytetrafluoroethylene, and an object of the present invention is to provide a tube having an appropriate tensile strength and flexibility and being excellent internal insertion property. The object can he achieved by a tube comprising polytetralluoroethylene according to the present invention, in which, in a case where a surface shape of an inner surface of the tube is measured, when a direction of the measurement is parallel to a longitudinal direction of the tube and the measurement is performed in a forward direction and a reverse direction, a variation rate between a size of a periodic step measured in the forward direction and a size of the periodic step measured in the reverse direction is 5% or more.

公开(公告)号：US20230293850A1

公开(公告)日：2023-09-21

申请号：US18013743

申请日：2021-07-02

申请人： JUNKOSHA INC.

发明人： Suguru TANABE ,  Naoya YAMADA

IPC分类号： A61M25/00 ,  A61L29/06

CPC分类号： A61M25/0045 ,  A61L29/06

摘要： The invention relates to a tube including at least one layer formed of polytetrafluoroethylene, and an object of the invention is to provide a tube in which flexibility is adjusted while high mechanical strength is maintained. The object can be appropriately achieved by a tube including at least one layer formed by spirally winding a PTFE film, in which the tube has an endothermic peak in a range of 380° C.±10° C. in a temperature increasing process of DSC of the tube, and in at least one of the at least one layer, the number of windings per length of 10 mm in a longitudinal direction is not constant.

公开(公告)号：US20200338805A1

公开(公告)日：2020-10-29

申请号：US16924832

申请日：2020-07-09

申请人： JUNKOSHA INC.

发明人： Suguru TANABE

IPC分类号： B29C53/60 ,  B29C53/58

摘要： The present invention relates to a method for providing a semi-worked product and a mandrel covered with a long body which is the semi-worked product, in which the semi-worked product is a long body which is formed without a gap by spirally winding at least one sheet of film, at least one sheet of film of the at least one sheet of film is made of at least polytetrafluoroethylene, the long body has a thickness of 5 μm or more and 75 μm or less, and the long body is provided in a state of being in contact with a mandrel.