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GB2079797A
Expired / Lapsed
GB
⏱️ 0.0 years remaining
Making collagen fibres for surgical use
Assignee: Chemokol Ges Kollagenprod
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Filing: 1981-05-28
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Granted: —
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Expires: 2001-05-28
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
GB
Data Source
google_patents
Last Synchronized
2026-10-22 22:08
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/40; A61L15/22; A61L15/32; A61L15/325; A61L17/00; A61L17/06; A61L17/08; D; D06; D06M; D06M13/00; D06M13/322; D06M13/402; D06M13/425
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
127 words
In a process for the manufacture of collagen fibers for surgical purposes, in which Achilles tendons are decomposed in an alkaline medium and are mechanically treated after treatment with an acid, deswelled, crosslinked and dried, the improvement comprising the steps of: decomposing said Achilles tendons in an alkaline medium to an aminonitrogen content of from 0.15 to 0.30,umoles/g and, after a hydrochloric acid treatment and washing to a pH value of from 2 to 4, the swollen collagen substance is reduced in thickness under pressure, forming a two-dimensional network, then the individual longitudinal fibers are exposed by hackling, and then, after deswelling, the fibers are cross-linked with hexamethylene diisocyanate in the presence of a nonionic or cationiG emulsifier and are dehydrated and further processed on textile machines.
Claim 2
Dependent Claim
127 words
In a process for the manufacture of collagen fibers for surgical purposes, in which Achilles tendons are decomposed in an alkaline medium and are mechanically treated after treatment with an acid, deswelled, crosslinked and dried, the improvement comprising the steps of: decomposing said Achilles tendons in an alkaline medium to an aminonitrogen content of from 0.15 to 0.30,umoles/g and, after a hydrochloric acid treatment and washing to a pH value of from 2 to 4, the swollen collagen substance is reduced in thickness under pressure, forming a two-dimensional network, then the individual longitudinal fibers are exposed by hackling, and then, after deswelling, the fibers are cross-linked with hexamethylene diisocyanate in the presence of a nonionic or cationiG emulsifier and are dehydrated and further processed on textile machines.
Claim 3
Dependent Claim
30 words
Process according to claim 1, wherein the thickness reduction of the swollen collagen substance is carried out by using a hammer press or a calendering machine or by fluted rollers.
Claim 4
Dependent Claim
37 words
Process according to claim 1 or 2, wherein the shrinking of the fibers is carried out by the use of a sodium chloride solution of from 5 to 50% by weight, preferably 7 to 15% by weight.
Claim 5
Dependent Claim
26 words
Process according to claim 1, 2 or 3, wherein an impregnation with medicaments is carried out at the same time as the dehydration of said fibers.
Claim 6
Dependent Claim
42 words
Process according to any one of claims 1 to 4, wherein the collagen fibers are proc- essed on modified carding machines to fiber fleeces of any desired weight and then, by pressing with embossing rollers, are solidified into firm textile flat-shaped articles.
Claim 7
Dependent Claim
56 words
Process according to claim 5, wherein the solidified fiber fleece is processed with fiber yarn very similar to carded yarn, whereby said fibers protruding from the yarn are pieced by a subsequent treatment into a pair of rubbing leathers, and the yarns thus prepared are processed on conventional textile machines into woven fabrics and knitted goods.
Claim 8
Dependent Claim
48 words
Process for the manufacture of collagen fibers substantially as hereinbefore described. Printed for Her Majesty's Stationery Office by Burgess Et Son (Abingdon) Ltd_-1 982. Published at The Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained. z t 4 1 i i
Claim 9
Dependent Claim
48 words
Process for the manufacture of collagen fibers substantially as hereinbefore described. Printed for Her Majesty's Stationery Office by Burgess Et Son (Abingdon) Ltd_-1 982. Published at The Patent Office, 25 Southampton Buildings, London, WC2A 1 AY, from which copies may be obtained. z t 4 1 i i
References Cited (Backward Citations)
No citation records indexed.
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