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Document Type and Number:
WIPO Patent Application WO/2019/026342
Kind Code:
[Problem] To provide a medical sheet with which a surface (a portion) subjected to ion bombardment, and a surface (a portion) which has not been subjected to ion bombardment can be distinguished from each other. [Solution] When Δb refers to the difference between value b1, which is the b value of a roughened surface portion 3, and value b2, which is the b value of a second surface 7, this medical sheet has a Δb in the range of 2-11 inclusive. A production method for the medical sheet includes a surface roughening step in which ion bombardment is used to perform surface roughening treatment on a portion or the entirety of a first surface 5 of a sheet including polytetrafluoroethylene, to form a roughened surface portion 5. In the production method, the ion bombardment is performed continuously at a degree of vacuum in the range of 10-7 to 10-1 atmospheres inclusive.

SAWADA Makoto (11-44 Akasaka 1-chome, Minato-k, Tokyo 52, 〒1070052, JP)
HOSHINO Seiji (11-44 Akasaka 1-chome, Minato-k, Tokyo 52, 〒1070052, JP)
Application Number:
Publication Date:
February 07, 2019
Filing Date:
March 29, 2018
Export Citation:
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TAMA BIO INC. (11-44, Akasaka 1-chome Minato-k, Tokyo 52, 〒1070052, JP)
International Classes:
B29C59/16; A61L27/14; C08J7/00; B29K27/18; B29L7/00
Foreign References:
Other References:
TAKAHASHI, NORIYOSHI ET AL.: "Biocompatibility of ePTFE modified by ion beam irradiation", NEUROLOGICAL SURGERY, vol. 32, no. 4, 2004, pages 339 - 344
KITAMURA, AKANE ET AL.: "The Joint Lecture Meeting of the Japan Society of Mechanical Engineers Kanto Branch Block (2007, Saitama)/The 3rd Saitama Block Meeting", MODIFICATION AND CELL ATTACHMENT ON PTFE SURFACE BY ION BEAM IRRADIATION, 21 September 2007 (2007-09-21), pages 211, 212
SUZUKI, YOSHIAKI ET AL.: "Ion beam modification of ePTFE for medical applications", JOURNAL OF THE SURFACE SCIENCE SOCIETY OF JAPAN, vol. 32, no. 9, pages 551 - 556
Attorney, Agent or Firm:
HIROSE Takayuki (The RoyalBuilding 3F 3-8-7, Irifun, Chuo-ku Tokyo 42, 〒1040042, JP)
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