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US 11,459,679 B2Granted
Nonwoven fabric
AssigneeAdvanced Medical Solutions Limited
InventorsDavid Horridge, Colin Bradford
Life of this patent
Estimating the term…
Abstract
The present invention relates to a bonded nonwoven fabric generally including absorbent staple fibres and having bonding stripes of relatively high fibre entanglement density extending along the fabric and into the fabric from at least one face thereof. A method of producing a bonded nonwoven fabric suitable for use as an absorbent layer in a wound dressing is also described.
Claims19
A bonded nonwoven fabric comprising:
- absorbent staple fibres, wherein the absorbent staple fibres comprise gelling fibres, and
- bonding stripes extending along the bonded nonwoven fabric and into the bonded nonwoven fabric from at least one face thereof, wherein the bonding stripes are formed of needle bonded web, said bonding stripes being transversely spaced from each other by regions of unbonded web, which are free of needling, wherein:
- the bonding stripes are of high fibre entanglement density relative to the regions of unbonded web;
- and
- the width of the bonding stripes at the face of the bonded nonwoven web is less than the width of said regions of unbonded fabric as measured transversely to the bonding stripes.
2 more elements
A method of producing a bonded nonwoven fabric comprised of absorbent staple fibres comprising the steps of:
- (i) providing an unbonded web comprising absorbent staple fibres comprising gelling fibres, and
- (ii) forming in said unbonded web bonding stripes extending along the bonded nonwoven fabric and into the bonded nonwoven fabric from at least one face thereof, said bonding stripes being formed to have a width at the face of the bonded nonwoven fabric less than the transverse distance between the centre lines of adjacent bonding stripes whereby there are regions of unbonded web remaining between the bonding stripes as measured transversely thereto;
- wherein the bonding stripes are of high fibre entanglement density relative to the regions of unbonded web said bonding stripes being transversely spaced from each other by regions of unbonded web wherein the width of the bonding stripes at the face of the bonded nonwoven fabric is less than the width of said regions of unbonded web as measured transversely to the bonding stripes;
- and wherein the bonding stripes are formed by needling the unbonded web.
1 more element
Dependencies are inferred from the claim text.