Absorbent comprising upper and lower gel layers
First Claim
1. Absorbent structure comprising an upper layer and a lower layer, each layer comprising absorbent gelling material particles, the upper layer comprising an acquisition zone and a storage zone, the average basis weight of absorbent gelling material particles in the acquisition zone being lower than the average basis weight of the absorbent gelling material particles in the storage zone, wherein the lower layer comprises a mixture of absorbent gelling material particles and fibers,wherein the upper layer comprises a liquid-permeable substrate and a layer of absorbent gelling material particles attached to said substrate,the weight of the absorbent gelling material particles in the mixed lower layer being not more than 70 percent, of the weight of the mixed lower layer, the combined weight of absorbent gelling material particles in the upper layer and in the mixed lower layer being at least 80 percent, of the weight of fibers in the mixed lower layer.
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Abstract
The invention relates to an absorbent structure (1) having a first layer which forms a mixture of absorbent gelling material particles (5), fibers, a second layer comprising liquid permeable substrate (7), and absorbent gelling material particles (9) attached to said substrate thus forming a laminate. The weight of the absorbent gelling material particles (5) in the mixed layer is not more than 70 percent, preferably not more than 60 percent of the weight of the mixed layer. The combined weight of the absorbent gelling material particles attached to the substrate (7), and in the mixed layer (5) is at least 80 percent, preferably at least 140 percent of the weight of fibers in the mixed layer (5). The laminate (7, 9) can be located on top of the mixed layer (5), and comprises an acquisition zone (15) of low basis weight of absorbent gelling material particles. The laminate may also be located below the mixed layer.
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27 Claims
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1. Absorbent structure comprising an upper layer and a lower layer, each layer comprising absorbent gelling material particles, the upper layer comprising an acquisition zone and a storage zone, the average basis weight of absorbent gelling material particles in the acquisition zone being lower than the average basis weight of the absorbent gelling material particles in the storage zone, wherein the lower layer comprises a mixture of absorbent gelling material particles and fibers,
wherein the upper layer comprises a liquid-permeable substrate and a layer of absorbent gelling material particles attached to said substrate, the weight of the absorbent gelling material particles in the mixed lower layer being not more than 70 percent, of the weight of the mixed lower layer, the combined weight of absorbent gelling material particles in the upper layer and in the mixed lower layer being at least 80 percent, of the weight of fibers in the mixed lower layer.
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2. Absorbent structure comprising an upper layer and a lower layer, each layer comprising absorbent gelling material particles,
wherein the upper layer comprises a mixture of absorbent gelling material particles and fibers, the weight of the absorbent gelling material particles in the mixed upper layer being not more than 70 percent, of the weight of the mixed upper layer, the lower layer comprising a substrate, the layer of absorbent gelling material particles of the lower layer being attached to said substrate, wherein the combined weight of absorbent gelling material particles in the mixed upper layer and in the lower layer is at least 80 percent of the weight of the fibers in the mixed upper layer.
Specification