Laminate absorbent core for use in absorbent articles

Abstract

The invention relates to absorbent cores having high stripes of absorbent material separated by gaps.

What is claimed is: 
     
         1 . A laminate absorbent core comprising:
 a first laminate layer comprising a first substrate layer and an absorbent material, wherein the absorbent material comprises superabsorbent polymer material forming multiple stripes on the first substrate layer; and   a second laminate layer comprising a second substrate layer and an absorbent material comprising superabsorbent polymer particles forming a second set of stripes on the second substrate layer; and   wherein the stripes of the superabsorbent polymer particles on both the first substrate layer and the second substrate layer are spaced apart from each other to form gaps that are substantially free of superabsorbent polymer particles, wherein the first laminate layer and the second laminate layer are positioned on each other to form a discontinuous layer of superabsorbent polymer particles such that a gap in the first laminate layer is at least in partial contact with a gap in the second laminate layer to form a combined gap extending from the first substrate layer to the second substrate layer, wherein the combined gap is substantially free of superabsorbent polymer material.   
     
     
         2 . The laminate absorbent core of  claim 1  further comprising less than 5% by weight of cellulose fiber. 
     
     
         3 . The laminate absorbent core of  claim 1 , wherein superabsorbent polymer particles make up more than 80% by weight of the total amount of absorbent material comprised between the first substrate layer and the second substrate layer. 
     
     
         4 . The laminate absorbent core of  claim 1  further comprising a peak swelling restriction pressure from 50 N/m 2  to 400 N/m 2 . 
     
     
         5 . The laminate absorbent core of  claim 1  further comprising a swelling restriction pressure at 20 mm of more than 30 N/m 2 . 
     
     
         6 . The laminate absorbent core of  claim 1  further comprising a ratio of peak swelling restriction pressure to swelling restriction pressure at 20 mm of from 1 to 10. 
     
     
         7 . The laminate absorbent core of  claim 1 , wherein the laminate absorbent core has a longitudinal direction and a lateral direction, and wherein the stripes of superabsorbent polymer material extend in the longitudinal direction. 
     
     
         8 . The laminate absorbent core of  claim 1 , wherein the laminate absorbent core comprises an adhesive which is applied on the first and second carrier substrate at least in the gaps formed between neighboring stripes of superabsorbent polymer particles. 
     
     
         9 . An absorbent article comprising a topsheet, a backsheet and a laminate absorbent core according to  claim 1 . 
     
     
         10 . A laminate absorbent core comprising a first laminate layer comprising a first substrate layer and superabsorbent polymer particles forming multiple stripes on the first substrate layer and a second laminate layer comprising a second substrate layer and superabsorbent polymer particles forming multiple stripes on the second substrate layer,
 wherein the stripes of the superabsorbent polymer particles on both the first substrate layer and the second substrate layer are spaced apart from each other to form gaps that are substantially free of superabsorbent polymer particles, wherein the first laminate layer and the second laminate layer are positioned on each other such that the superabsorbent polymer particle stripes of the second laminate layer are overlaying the gaps in the first laminate layer and the superabsorbent polymer particle stripes of the first laminate layer are overlaying the gaps in the second laminate layer and each gap in the first laminate layer is wider than the corresponding superabsorbent polymer particle stripe of the second laminate layer above the gap and each gap in the second laminate layer is wider than the corresponding superabsorbent polymer particle stripe of the first laminate layer below the gap, such that the stripes of superabsorbent polymer particles of the first laminate layer do not contact the stripes of superabsorbent polymer particles of the second laminate layer.   
     
     
         11 . The laminate absorbent core of  claim 10  further comprising less than 5% by weight of cellulose fiber. 
     
     
         12 . The laminate absorbent core of  claim 10 , wherein superabsorbent polymer particles make up more than 80% by weight of the total amount of absorbent material comprised between the first substrate layer and the second substrate layer. 
     
     
         13 . The laminate absorbent core of  claim 10  further comprising a peak swelling restriction pressure from 50 N/m 2  to 400 N/m 2 . 
     
     
         14 . The laminate absorbent core of  claim 10  further comprising a swelling restriction pressure at 20 mm of more than 30 N/m 2 . 
     
     
         15 . The laminate absorbent core of  claim 10  further comprising a ratio of peak swelling restriction pressure to swelling restriction pressure at 20 mm of from 1 to 10. 
     
     
         16 . The laminate absorbent core of  claim 10 , wherein the laminate absorbent core has a longitudinal direction and a lateral direction, and wherein the stripes of superabsorbent polymer material extend in the longitudinal direction. 
     
     
         17 . The laminate absorbent core of  claim 10 , wherein the laminate absorbent core comprises an adhesive which is applied on the first and second carrier substrate at least in the gaps formed between neighboring stripes of superabsorbent polymer particles. 
     
     
         18 . The laminate absorbent core according to  claim 10 , wherein the edge of the superabsorbent polymer particle stripe of the first laminate layer is spaced apart by at least 3 mm from the edge of the superabsorbent polymer particle stripe of the second laminate layer. 
     
     
         19 . An absorbent article comprising a topsheet, a backsheet and a laminate absorbent core according to  claim 10 .