Multiple component spunbond web
AssigneeE. I. Du Pont de Nemours and Company
InventorsVishal Bansal, Sam Louis Samuels
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Abstract
A multiple component spunbond web is provided in which the spunbond fibers are polymeric sheath-core fibers with a sheath made of a blend of polyethylene and an acid copolymer and a polyester or polyamide core. The spunbond webs can be thermally bonded have an improved combination of strength, softness, and heat sealability and can be used to prepare multi-layer composite sheets including spunbond-meltblown-spunbond fabrics suitable for use in medical garments and other end uses.
Claims7
A multiple component spunbond nonwoven web comprising polymeric sheath-core substantially continuous spunbond fibers wherein the sheath component comprises a blend comprising polyethylene and between about 5 and 30 weight percent of an acid copolymer selected from the group consisting of copolymers of ethylene with methacrylic acid, copolymers of metal salts of ethylene with methacrylic acid, copolymers of metal salts of ethylene with acrylic acid, or a combination thereof, the core component comprises a polymer selected from the group consisting of polyesters and polyamides, and the weight ratio of sheath component to core component is between about 10:90 and 90:10, wherein the spunbond web is thermally bonded and has a ratio of grab tensile strength to basis weight of at least 0.66 N per gm/m2 in both the machine direction and the cross-direction.
Dependencies are inferred from the claim text.