Title:
DOUBLE-RASCHEL-KNITTED TUBE FOR ARTIFICIAL BLOOD VESSELS AND PROCESS FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/111309
Kind Code:
A1
Abstract:
[Problem] To provide: a process for producing a double-raschel-knitted tube for artificial blood vessels, in which the occurrence of thread breakage or fluffing can be minimized and which can be knitted with high efficiency; and a double-raschel-knitted tube for artificial blood vessels, which is produced by the process.
[Solution] The present invention is a process for producing a double-raschel-knitted tube (W) for artificial blood vessels, comprising: refining a raw silk thread (2) which is composed of N plies of silk threads (1) each composed of a pair of core parts (41) formed by fibroin (11) and a skin part (42) surrounding the core parts (41) and formed by sericin (12); removing a portion of sericin (12) and leaving a portion of sericin (12) so as to separate the pair of core parts (41) from each other, thereby forming 2N plies of fibroin threads (4) each having a skin-core structure, thus producing sericin-coated silk threads (5) each of which is composed of the 2N plies of fibroin threads (4) each having a skin-core structure; subsequently subjecting the sericin-coated silk threads (5) to first twisting to produce first-twisted silk threads; combining a few plies of the first-twisted silk threads and then subjecting the combined first-twisted silk threads to second twisting to produce a plied silk yarn; and subsequently carrying out knitting using the plied silk yarn (T) as a knitting yarn (Y) to form a tubular knitted material.
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Inventors:
TAKAGI YOSHIHIDE (JP)
YAMAUCHI NOBUYUKI (JP)
TSUBOTA SHOUICHI (JP)
YAMAUCHI NOBUYUKI (JP)
TSUBOTA SHOUICHI (JP)
Application Number:
PCT/JP2012/000954
Publication Date:
August 23, 2012
Filing Date:
February 14, 2012
Export Citation:
Assignee:
FUKUI WARP KNITTING CO LTD (JP)
TAKAGI YOSHIHIDE (JP)
YAMAUCHI NOBUYUKI (JP)
TSUBOTA SHOUICHI (JP)
TAKAGI YOSHIHIDE (JP)
YAMAUCHI NOBUYUKI (JP)
TSUBOTA SHOUICHI (JP)
International Classes:
A61L27/00; A61L17/00; A61F2/06
Domestic Patent References:
| WO2008038424A1 | 2008-04-03 |
Foreign References:
| JPH0625905A | 1994-02-01 | |||
| JP2004173772A | 2004-06-24 | |||
| JP2010137041A | 2010-06-24 | |||
| JP2006519664A | 2006-08-31 | |||
| JP2006516202A | 2006-06-29 |
Attorney, Agent or Firm:
SHIRASAKI, SHINJI (JP)
Shinji Shirasaki (JP)
Shinji Shirasaki (JP)
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Claims: