Absorbent articles with improved cores
First Claim
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1. An absorbent core extending in a lateral direction and a longitudinal direction, the absorbent core having a front edge, a back edge, and two side edges, the absorbent core comprising:
- a first substrate and a second substrate, wherein each substrate comprises an inner surface and an outer surface,an absorbent material comprising an absorbent particulate polymer disposed between the first substrate and the second substrate in an absorbent particulate polymer material area, the absorbent particulate polymer material area encompassing one or more channel area(s) that are substantially free of absorbent material,a hot melt adhesive applied directly to the inner surface of at least one of the first or second substrate, wherein the adhesive bonds the inner surface of the first substrate to the inner surface of the second substrate through the one or more channel area(s) substantially free of absorbent material;
wherein the bond of the inner surface of the first substrate to the inner surface of the second substrate through the one or more channel area(s) substantially free of absorbent material has a normalized final channel hang time of at least 800 minutes, andwherein the absorbent material is supported by and immobilized between the first and second substrate layers by a fiberized net structure.
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Abstract
Absorbent articles and absorbent core structures with improved core strength and stability with long core end seal and channel hang times.
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Citations
24 Claims
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1. An absorbent core extending in a lateral direction and a longitudinal direction, the absorbent core having a front edge, a back edge, and two side edges, the absorbent core comprising:
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a first substrate and a second substrate, wherein each substrate comprises an inner surface and an outer surface, an absorbent material comprising an absorbent particulate polymer disposed between the first substrate and the second substrate in an absorbent particulate polymer material area, the absorbent particulate polymer material area encompassing one or more channel area(s) that are substantially free of absorbent material, a hot melt adhesive applied directly to the inner surface of at least one of the first or second substrate, wherein the adhesive bonds the inner surface of the first substrate to the inner surface of the second substrate through the one or more channel area(s) substantially free of absorbent material; wherein the bond of the inner surface of the first substrate to the inner surface of the second substrate through the one or more channel area(s) substantially free of absorbent material has a normalized final channel hang time of at least 800 minutes, and wherein the absorbent material is supported by and immobilized between the first and second substrate layers by a fiberized net structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An absorbent core extending in a lateral direction and a longitudinal direction, the absorbent core having a front edge, a back edge, and two side edges, the absorbent core comprising:
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a first substrate and a second substrate, wherein each substrate comprises an inner surface and an outer surface, an absorbent material comprising an absorbent particulate polymer disposed between the first substrate and the second substrate in an absorbent particulate polymer material area, a hot melt adhesive applied directly to the inner surface of the first or the second substrate such that the first substrate and the second substrate are bonded along the front edge and along the back edge of the absorbent core to create a front end seal and a back end seal; wherein the front end seal and the back end seal each have a normalized final core end seal hang time of at least 250 minutes, and wherein the absorbent material is supported by, and immobilized between the first and second substrate layers by a fiberized net structure. - View Dependent Claims (20, 21, 22, 23, 24)
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Specification