Woven or knitted elastic bandages having controlled compressive forces
First Claim
1. An elastic bandage comprising a knitted or woven fabric containing both inelastic and elastic yarns, knitted or woven together, in which the ratio of inelastic yarns to elastic yarns is from 1:
- 1 to 12;
1 and in which the bandage achieves an effective compressive force at an extension of between 20 to 60% after which any further extension of the bandage up to 100% is accompanied by an increase of less than 40% in compressive force above the effective compressive force.
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Abstract
An elastic bandage comprises a knitted or woven fabric containing both inelastic and elastic yarns in which the ratio of inelastic yarns to elastic yarns is from 1:1 to 12:1 and in which the bandage achieves an effective compressive force at an extension of between 20 to 60% after which any further extension of the bandage is accompanied by only a small increase in compressive force. Suitable polymers for the elastic yarns include block copolymers such as styrene-butylene-ethylene-styrene block copolymers. Woven or knitted elastic bandages made of such yarns exhibit good stress retention properties.
39 Citations
19 Claims
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1. An elastic bandage comprising a knitted or woven fabric containing both inelastic and elastic yarns, knitted or woven together, in which the ratio of inelastic yarns to elastic yarns is from 1:
- 1 to 12;
1 and in which the bandage achieves an effective compressive force at an extension of between 20 to 60% after which any further extension of the bandage up to 100% is accompanied by an increase of less than 40% in compressive force above the effective compressive force. - View Dependent Claims (2, 3, 5, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- 1 to 12;
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4. A bandage as claimed in claimed 3 wherein the single block copolymer and the one block copolymer are triblock copolymers of the type A--B--A1 wherein A1 and A may be the same or different and are polymers derived from styrene, alpha, methyl styrene, or a substituted styrene and B is a polymer derived from an alkene or alkdiene having 2 to 4 carbon atoms.
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6. An elastic bandage which comprises a knitted or woven fabric containing both inelastic and elastic yarns, knitted or woven together, in which the elastic yarn is formed from a styrene-ethylene-butylene-styrene block copolymer in which the ratio of inelastic yarns to elastic yarns is from 1:
- 1 to 12;
1 and in which the bandage achieves an effective compressive force at an extension of between 20 to 60% after which any further extension of the bandage up to 100% is accompanied by an increase of less than 40% in compressive force above the effective compressive force.
- 1 to 12;
Specification