Improved abrasion resistance of nonwovens
AssigneeAhlstron Windsor Locks LLC
InventorSmita Bais
Life of this patent
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Abstract
An extruded web material comprises a conjugate fiber including first and second fiber portions. The first fiber portion extends substantially continuously along the length of the conjugate fiber and comprises a first thermoplastic polymeric material. The second fiber portion extends substantially continuously along the length of the conjugate fiber and defines at least a portion of a conjugate fiber exterior surface. The second fiber portion comprises a second thermoplastic polymeric material. At least one of the first fiber portion or the second fiber portion further comprises a thermoplastic adhesive component. The extruded web material is produced by spunbonding or meltblowing. The extruded web material can also be included in a composite article.
Claims18
An extruded web material comprising a conjugate fiber including a first fiber portion extending substantially continuously along the length of the conjugate fiber and comprising a first thermoplastic polymeric material and a second fiber portion extending substantially continuously along the length of the conjugate fiber and defining at least a portion of a conjugate fiber exterior surface, the second fiber portion comprising a second thermoplastic polymeric material, wherein at least one of the first fiber portion or the second fiber portion further comprises a thermoplastic adhesive component selected from poly(ethylene vinyl acetate), polyvinyl alcohol, poly(ethylene vinyl alcohol), a copolymer of one of the polymers or mixtures thereof.
A method of improving the abrasion resistance of a nonwoven web material, comprising:
- providing a first thermoplastic feedstock and a second thermoplastic feedstock;
- mixing no more than about 50% by weight of a thermoplastic adhesive component selected from poly(ethylene vinyl acetate), polyvinyl alcohol, poly(ethylene vinyl alcohol), a copolymer of one of the polymers or mixtures thereof with at least one of the first feedstock or the second feedstock;
- extruding the first feedstock and the second feedstock to form a conjugate fiber, the first feedstock forming a first fiber portion extending substantially continuously along the length of the conjugate fiber and the second feedstock forming a second fiber portion extending substantially continuously along the length of the conjugate fiber and defining at least a portion of the conjugate fiber exterior surface;
- depositing the fiber on a forming surface to form a batt;
- and
- bonding the batt to form the nonwoven web material.
A composite article, comprising:
- An extruded web material layer comprising a conjugate fiber including, a first fiber portion extending substantially continuously along the length of the conjugate fiber and comprising a first polymeric material;
- and a second fiber portion extending substantially continuously along the length of the conjugate fiber and defining at least a portion of the conjugate fiber exterior surface, the second fiber portion comprising a second polymeric material, wherein at least one of the first fiber portion or the second fiber portion further includes a thermoplastic adhesive component selected from poly(ethylene vinyl acetate), polyvinyl alcohol, poly(ethylene vinyl alcohol), a copolymer of one of the polymers or mixtures thereof;
- and
- a substrate layer substantially attached to the extruded web material.
An extruded web material comprising a conjugate fiber, the conjugate fiber including a first fiber portion comprising about 30% to about 70% of the conjugate fiber weight and extending substantially continuously along the length of the conjugate fiber, the first fiber portion selected from polyethylene terephthalate, polybutylene terephthalate, poly trimethylene terephthalate, polylactic acid, polypropylene, polyamide and a second fiber portion comprising about 10% to about 70% of the conjugate fiber weight and extending substantially continuously along the length of the conjugate fiber and defining at least a portion of a conjugate fiber exterior surface, the second fiber portion comprising polyethylene, wherein at least one of the first fiber portion or the second fiber portion further comprises less than about 50% by weight of a thermoplastic adhesive component consisting essentially of poly(ethylene vinyl acetate) polymer.
Dependencies are inferred from the claim text.