Polytetrafluoroethylene tube and medical tube using same

    公开(公告)号:US11998663B2

    公开(公告)日:2024-06-04

    申请号:US18222174

    申请日:2023-07-14

    申请人: Junkosha Inc.

    IPC分类号: A61L29/06 A61L29/04

    CPC分类号: A61L29/06 A61L29/041

    摘要: The present invention provides a thin-walled PTFE tube with appropriate elongation, sufficient strength, and good uniformity during stretching and a medical tube with excellent flexibility and dimensional accuracy. The polytetrafluoroethylene tube according to the present invention is a polytetrafluoroethylene tube having a wall thickness of about 0.04 mm or less, wherein the wetting tension of either of or both outer and inner surfaces of the polytetrafluoroethylene tube is 46 mN/m or more, and in a stress-strain curve obtained by a tensile test performed under an atmosphere of 200° C., tensile stress at 20% strain σ20 (N/mm2) of the polytetrafluoroethylene tube and tensile stress at 50% strain σ50 (N/mm2) of the polytetrafluoroethylene tube satisfy 2.0≤0.1×σ20+0.3×σ50

    TUBE
    10.
    发明公开
    TUBE 审中-公开

    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.

    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.