Absorbent structure for absorbent articles
First Claim
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1. An absorbent core for an absorbent article comprising an absorbent structure, the absorbent structure comprising a first supporting sheet and a first absorbent layer supported thereon;
- said first absorbent layer comprising an absorbent material comprising a superabsorbent polymer material;
said absorbent structure and first absorbent layer having a longitudinal dimension and average length, and transverse dimension and average width, and a height;
said first absorbent layer having a longitudinal axis and perpendicular thereto a transverse axis; and
said first absorbent layer having a first longitudinally extending side portion on one side of said longitudinal axis, and a second longitudinally extending side portion on the other side of said longitudinal axis;
said absorbent structure and said first absorbent layer thereof having a front region, back region and therein between a crotch region, and said first absorbent layer comprises opposing longitudinal edges and opposing transverse edges;
whereby said first absorbent layer has at least a first substantially longitudinally extending channel present in said first side portion, and a second substantially longitudinally extending channel present in said second side portion, each channel being substantially free of said superabsorbent polymer material and extending through said height of said first absorbent layer and each channel being curved and concave toward the longitudinal axis;
wherein said absorbent structure comprises one or more adhesive materials to at least partially immobilize said first absorbent layer onto said first supporting sheet and to adhere the first supporting sheet in each channel;
wherein said one or more adhesive material includes a first thermoplastic fibrous adhesive material forming a fibrous network that immobilizes said absorbent material on said first supporting sheet and adheres the first supporting sheet in each channel; and
wherein the first absorbent layer has a transverse dimension and an average width W, a longitudinal dimension and average length L; and
each channel has an average width W′
that is from about 4% to about 25% of the average width W of said absorbent layer; and
each channel has an average length L′
that is from about 40% to about 80% of L; and
wherein the channels do not extend up to any of the longitudinal edges or transverse edges of said first absorbent layer and wherein each channel is present in at least said front and crotch regions; and
wherein the channels are separated by a smallest spacing distance of at least 5 mm; and
wherein the absorbent core further comprises an acquisition material system having an upper acquisition layer and a lower acquisition layer, wherein the lower acquisition layers undulates into at least one of the channels and the upper acquisition layer does not undulate into the channels.
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Abstract
Absorbent structure (13)s for absorbent articles are provided, comprising an absorbent layer (17) with absorbent material (50) containing superabsorbent polymer particles supported by a supporting sheet (16), and having first and a second substantially longitudinal channel (26) that are free of said superabsorbent polymeric particles, and that comprises one or more adhesive material to immobilize said absorbent material (50). The channels can provide improved fit and/or liquid acquisition/transportation, and/or improved performance.
1118 Citations
10 Claims
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1. An absorbent core for an absorbent article comprising an absorbent structure, the absorbent structure comprising a first supporting sheet and a first absorbent layer supported thereon;
- said first absorbent layer comprising an absorbent material comprising a superabsorbent polymer material;
said absorbent structure and first absorbent layer having a longitudinal dimension and average length, and transverse dimension and average width, and a height;
said first absorbent layer having a longitudinal axis and perpendicular thereto a transverse axis; and
said first absorbent layer having a first longitudinally extending side portion on one side of said longitudinal axis, and a second longitudinally extending side portion on the other side of said longitudinal axis;
said absorbent structure and said first absorbent layer thereof having a front region, back region and therein between a crotch region, and said first absorbent layer comprises opposing longitudinal edges and opposing transverse edges;whereby said first absorbent layer has at least a first substantially longitudinally extending channel present in said first side portion, and a second substantially longitudinally extending channel present in said second side portion, each channel being substantially free of said superabsorbent polymer material and extending through said height of said first absorbent layer and each channel being curved and concave toward the longitudinal axis;
wherein said absorbent structure comprises one or more adhesive materials to at least partially immobilize said first absorbent layer onto said first supporting sheet and to adhere the first supporting sheet in each channel;wherein said one or more adhesive material includes a first thermoplastic fibrous adhesive material forming a fibrous network that immobilizes said absorbent material on said first supporting sheet and adheres the first supporting sheet in each channel; and
wherein the first absorbent layer has a transverse dimension and an average width W, a longitudinal dimension and average length L; and
each channel has an average width W′
that is from about 4% to about 25% of the average width W of said absorbent layer; and
each channel has an average length L′
that is from about 40% to about 80% of L; andwherein the channels do not extend up to any of the longitudinal edges or transverse edges of said first absorbent layer and wherein each channel is present in at least said front and crotch regions; and
wherein the channels are separated by a smallest spacing distance of at least 5 mm; andwherein the absorbent core further comprises an acquisition material system having an upper acquisition layer and a lower acquisition layer, wherein the lower acquisition layers undulates into at least one of the channels and the upper acquisition layer does not undulate into the channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- said first absorbent layer comprising an absorbent material comprising a superabsorbent polymer material;
Specification