Absorbent core comprising a high loft central layer and two different superabsorbent polymers
AssigneeThe Procter & Gamble Company
InventorFengchun Ye
Life of this patent
Estimating the term…
Abstract
An absorbent core for use in an absorbent article including a high loft central layer having deposited on two different surfaces thereon a first superabsorbent polymer SAP1 and a second superabsorbent polymer SAP2 in the form of particles that are at least partially distributed within the high loft layer. The SAP1 has a higher capacity than SAP2 and the permeability of SAP2 is more than 5×10-7 cm3·s/g.
Claims20
An absorbent core for use in an absorbent article, the absorbent core extending in a transversal direction and a longitudinal direction and having a thickness in a vertical direction perpendicular to the transversal direction and longitudinal direction, the absorbent core comprising:
- a liquid-permeable top cover layer;
- a bottom cover layer;
- a high loft central layer between the top cover layer and the bottom cover layer, the high loft central layer having a top surface oriented towards the top cover layer and a bottom surface oriented towards the bottom cover layer;
- a first superabsorbent polymer, SAP1, in the form of particles deposited on the top surface of the high loft central layer, wherein the SAP1 particles are substantially uniformly blended across a thickness of the high loft central layer, and the SAP1 particles are partially distributed in a z-distribution pattern comprising two or more peaks of density separated by at least one buffer zone, in the vertical direction within the high loft central nonwoven;
- a second superabsorbent polymer, SAP2, in the form of particles deposited on the bottom surface of the high loft central layer, wherein the SAP2 particles are substantially uniformly blended across the thickness of the high loft central layer, and the SAP2 particles are partially distributed in a z-distribution pattern comprising two or more peaks of density separated by at least one buffer zone, in the vertical direction within the high loft central layer;
- wherein each of SAP1 and SAP2 have a respective capacity as measured by the CRC method and a permeability as measured by the UPM test method, wherein SAP1 has a higher capacity than SAP2, and wherein the permeability of SAP2 is in the range of from 30×10−7 cm3·s/g to 70×10−7 cm3·s/g.
Dependencies are inferred from the claim text.