EP0057590A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Napped fluororesin material having continuous pores, and a method of manufacturing the same
Assignee: Junkosha Co Ltd
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Filing: 1982-01-29
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Granted: —
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Expires: 2002-01-29
Abstract
Abstract A sheet or tube of fluororesin material having continuous pores, particularly polytetrafluoroethylene, has a nap raised on at least one surface thereof, and is suitable for prosthetic use as a patch, or an artificial blood vessel. A method of manufacturing such napped fluororesin material comprises impregnating fluororesin material having continuous pores with water, freezing it, raising a nap thereon, and defrosting and dewatering it.
Inventors
- 👤 Toshikazu Junkosha Musashino-Ryo Sato
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 00:04
CPC Classifications
B; B29; B29C; B29C59/00; B29C59/02; B29C59/022; B29C59/025; A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61L; A61L27/00; A61L27/14; A61L27/16; A61L33/00; A61L33/0005; A61L33/007; A61L33/0094; B29C44/00; B29C44/34; B29C44/56; C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; B29C2059/027; B29K; B29K2027/00; B29K2027/12; B29K2105/00; B29K2105/04; B29K2105/045; B29L; B29L2007/00; B29L2007/001; B29L2023/00; B29L2023/003; B29L2031/00; B29L2031/753; B29L2031/7532; B29L2031/7534
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
22 words
Fluororesin material having continuous pores therein, characterised by a nap extending over at least a part of the surface of said material.
Claim 2
Dependent Claim
22 words
Fluororesin material having continuous pores therein, characterised by a nap extending over at least a part of the surface of said material.
Claim 3
Dependent Claim
26 words
Fluororesin material according to claim 1 characterised in that it is in the form of a sheet having the nap on at least one side thereof.
Claim 4
Dependent Claim
33 words
Fluororesin material according to claim 1 characterised in that it is in the form of a tube having said nap on at least one of the inner and outer surfaces of the tube.
Claim 5
Dependent Claim
13 words
Fluororesin material according to any preceding claim characterised in that it comprises polytetrafluoroethylene.
Claim 6
Dependent Claim
20 words
Fluororesin material according to claim 1 characterised in that it is in the form of a patch for prosthetic use.
Claim 7
Dependent Claim
19 words
Fluororesin material according to claim 3 characterised in that it is in the form of an artificial blood vessel.
Claim 8
Dependent Claim
45 words
4 7. A method of manufacturing fluororesin material according to any of the preceding claims which is characterised by the steps of: impregnating the fluororesin material with water; freezing said water; raising a nap on said material; defrosting and removing the water from said material.
Claim 9
Dependent Claim
46 words
A method according to claim 7 characterised by impregnating said material with a liquid having a low surface tension, and selected from the group consisting of alcohols and surface active agents before said material is impregnated with water, said liquid being then replaced by said water.
Claim 10
Dependent Claim
23 words
A method according to claim 7 or claim 8 characterised by raising the nap by brushing said material with a soft wire brush.
References Cited (Backward Citations)
No citation records indexed.
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