Absorbent structures having low melting fibers
OwnerJerome James Workman JR., Francis Paul Abuto +3inventors
InventorsJerome James Workman JR., Francis Paul Abuto, Vasily Aramovich Topolkaraev, Palani Raj Ramaswami Wallajapet, Peiguang Zhou
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Abstract
A nonwoven structure is provided having a fiber with a lower melting point than conventional fibers, preferably less than 110° C., more particularly less than 90° C., more particularly less than 80° C. The fiber may also include an energy receptive additive that provides rapid heating when subjected to dielectric energy such as radio frequency or microwave radiation. When included in a structure and subjected to electromagnetic radiation, the fiber is heated by contact with materials like pulp and superabsorbent, which absorb electromagnetic radiation.
Claims29
A nonwoven structure comprising binder fibers made from a polymer having a melting point of at most 110° C., wherein said structure has a center and an outer surface and wherein said structure has less than 5 times more oxidation at said outer surface than at said center.
A nonwoven structure comprising superabsorbent in an amount of from 0 to 80 weight percent, natural fibers in an amount from about 5 to 98 weight percent and low melting point binder fibers in an amount of from about 1 to 60 weight percent, wherein said low melting point fiber has a melting point of at most 110° C., said structure has a center and an outer surface, and wherein said structure has less than 5 times more oxidation at said outer surface than at said center.
A nonwoven structure comprising from about 4 to 12 weight percent of a binder fiber having a melting point of at most 110° C., 30 to 70 weight percent superabsorbent and 30 to 70 weight percent natural fiber, wherein said structure has been subjected to microwave radiation to activate said binder fiber and bond said structure.
Dependencies are inferred from the claim text.