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US 12,533,001 B2Granted
Unitary nonwoven material
AssigneeGlatfelter Corporation
InventorsRichard Booker, Thomas J. Cavanaugh, Jacek K. Dutkiewicz
Life of this patent
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Abstract
Nonwoven materials having at least one layer comprising cellulose fibers are provided. The nonwoven materials comprise bonded natural cellulosic fibers having high capillary action. The nonwoven materials are suitable for use in a variety of applications, including absorbent products and pre-moistened cleaning materials with metered release of liquid.
Claims19
A unitary airlaid nonwoven material comprising three layers of fibers, wherein
- a first layer of the three layers of fibers comprises synthetic bicomponent fibers, each synthetic bicomponent fiber having a core comprising a first polymer and a sheath comprising a second polymer, the sheath surrounding the core;
- a second layer of the three layers of fibers comprises cellulose fibers and synthetic low core bicomponent fibers, each synthetic low core bicomponent fiber having a core comprising a first polymer and a sheath comprising a second polymer, the sheath surrounding the core, wherein the core is less than 50% by weight of the synthetic low core bicomponent fiber;
- a third layer of the three layers of fibers comprises cellulose fibers and synthetic high core bicomponent fibers, each synthetic high core bicomponent fiber having a core comprising a first polymer having a melting point above 200° C. and a polyethylene sheath surrounding the core, wherein the core is more than 50% by weight of the synthetic high core bicomponent fiber;
- one or both of the cellulose fibers of the second layer and the third layer comprise hardwood bonded natural cellulosic fibers having a coarseness ranging from about 4.2 mg/100 m to about 8.8 mg/100 m.
1 more element
Dependencies are inferred from the claim text.