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Patent Searching and Data


Title:
FLEXIBLE MULTILAYER TUBE
Document Type and Number:
Japanese Patent JPH08142236
Kind Code:
A
Abstract:

PURPOSE: To obtain a flexible tube having excellent chemical resistance, heat resistance, airtightness, bending resistance, etc., by integrating a first layer made of polytetrafluoriethylene having a solid structure and a second layer made of a tube having a porous structure of the same product by thermal fusion bonding, and setting the thickness of the first layer to a specific range of the total of both the layers.

CONSTITUTION: This flexible multilayer tube comprises a first layer of polytetrafluoroethylene having a solid structure and a second layer of a porous structure of polytetrafluoroethyelene covering the outer periphery of the first layer in such a manner that the first and second layers are integrated by thermal fusion bonding, the thickness of the first layer is in a range of 1/1000 to 1/2 of the total thickness of both the layers or preferably 1/100 to 1/2 of the thickness ratio. If the ratio exceeds 1/2, the obtained tube is easily broken. On the other hand, if it is smaller than 1/1000, it becomes excessively thin to the thickness of the first layer of the tube, and hence in the case of using the multilayer tube, the first layer is easily broken.


Inventors:
SHINMEN HIROSHI
URAGAMI SHINICHI
NAKAJIMA TOSHIYUKI
ARAI KEIICHI
Application Number:
JP31244294A
Publication Date:
June 04, 1996
Filing Date:
November 21, 1994
Export Citation:
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Assignee:
JAPAN GORE TEX INC
OLYMPUS OPTICAL CO
International Classes:
B32B1/08; B29C67/04; B29D22/00; B32B5/18; B32B27/30; B29K27/12; B29L9/00; B29L23/00; (IPC1-7): B32B1/08; B29C67/04; B29D22/00; B32B5/18; B32B27/30
Attorney, Agent or Firm:
Toshiaki Ikeura (1 outside)