Nonwoven fabrics suitable for medical applications
AssigneeNanhai Nanxin Non-Woven Co. Ltd.
InventorsYongji Jin, Guohua Wu
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Abstract
Nonwoven fabrics including a first spunbond layer comprising a first plurality of crimped continuous fibers, a second spunbond layer comprising a second plurality of crimped continuous fibers, and a third spunbond layer comprising a third plurality of crimped continuous fibers, in which the second spunbond layer is located directly or indirectly between the first spunbond layer and the third spunbond layer is provided. The nonwoven fabrics may have a thickness (e.g., loftiness) of at least about 0.3 mm and hydrostatic head of at least about 15 mbar. Methods of manufacturing nonwoven fabrics and protective articles are also provided.
Claims22
A nonwoven fabric, comprising:
- (i) a first spunbond layer comprising a first plurality of crimped continuous fibers, wherein the first plurality of crimped continuous fibers are formed from a single polymeric composition;
- (ii) a second spunbond layer comprising a second plurality of crimped continuous fibers;
- and
- (iii) a third spunbond layer comprising a third plurality of crimped continuous fibers, wherein the second spunbond layer is located directly between the first spunbond layer and the third spunbond layer;
- wherein the nonwoven fabric has a thickness of at least about 0.3 mm at 0.2 kPa as measured in accordance with FZ/T60004-91, and hydrostatic head of at least about 15 mbar as measured in accordance with AATCC 127.
A nonwoven fabric, comprising:
- (i) a first spunbond layer comprising a first plurality of crimped continuous fibers, wherein the first plurality of crimped continuous fibers comprise a first plurality of monocomponent fibers having a polymeric composition including (a) from 40 to 80% by weight of a polypropylene, (b) from 10 to 50% by weight of a polyolefin-containing copolymer, and (c) from 0.2 to 5% by weight of a slip agent;
- (ii) a second spunbond layer comprising a second plurality of crimped continuous fibers;
- and
- (iii) a third spunbond layer comprising a third plurality of crimped continuous fibers, wherein the second spunbond layer is located directly between the first spunbond layer and the third spunbond layer;
- wherein the nonwoven fabric has a thickness of at least about 0.3 mm at 0.2 kPa as measured in accordance with FZ/T60004-91, and hydrostatic head of at least about 15 mbar as measured in accordance with AATCC 127.
A method of forming a nonwoven fabric, comprising:
- (i) providing or forming a first spunbond layer comprising a first plurality of crimped continuous fibers, wherein the first plurality of crimped continuous fibers are formed from a single polymeric composition;
- (ii) providing or forming a second spunbond layer comprising a second plurality of crimped continuous fibers;
- (iii) providing or forming a third spunbond layer comprising a third plurality of crimped continuous fibers;
- and
- (iv) bonding the first spunbond layer, the second spunbond layer, and the third spunbond layer together to form the nonwoven fabric;
- wherein the nonwoven fabric has a thickness of at least about 0.3 mm at 0.2 kPa as measured in accordance with FZ/T60004-91 and hydrostatic head of at least about 15 mbar as measured in accordance with AATCC 127.
Dependencies are inferred from the claim text.