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Patents

Ultra-Thin Absorbent Article

U.S. Patent No. 9,549,858

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By: Karen McIntyre

Editor, Nonwovens Industry

Ching-Yun Morris Yang, Princeton Junction, NJ.

Filed: 1/6/10
Issued: 1/24/17

A napkin comprising: a liquid permeable cover layer; a liquid impermeable barrier layer; an absorbent core arranged between the cover layer and barrier layer, the absorbent core comprising a first substrate layer and a second substrate layer, and a mixture of aggregate superabsorbent polymer and a hot melt adhesive between the first substrate layer and the second substrate layer, the hot melt adhesive having a three-dimensional lattice structure formed by a plurality of interconnected lattice segments, wherein the superabsorbent polymer is suspended within the three-dimensional lattice structure, wherein the superabsorbent polymer is present in an amount of between about 50% to about 98% by weight and the hot melt adhesive is present in an amount between about 50% to about 2% by weight, and wherein said mixture is free of fibrous material; wherein the mixture extends continuously over a surface area of an adjacent layer in amount greater than 80% of a total surface area of the adjacent layer; wherein the mixture has a vertical delamination strength of greater than 9 N; wherein the first substrate layer includes a first wetlaid tissue layer; wherein the second substrate layer includes a second wetlaid tissue layer; and wherein said mixture is applied to the first substrate layer in an amount between 5 gsm and 150 gsm.

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