Abstract:
PROBLEM TO BE SOLVED: To provide an absorbent article with enhanced softness and fluid-handling capability, made of a liquid permeable top sheet; a liquid impermeable back sheet; and an absorbent core disposed between the topsheet and the backsheet, and to provide a method to make the same.SOLUTION: The absorbent core 15 is made on a continuous airlaid machine and includes: an acquisition layer 11 in effective fluid communication with the topsheet 10 and disposed beneath the topsheet; a storage layer 12 having absorbent capacity, the storage layer contacting the acquisition layer and being disposed beneath the acquisition layer; and a wicking layer 13 having a density between 0.1 g/cc and 0.3 g/cc, the wicking layer contacting the storage layer, and being disposed beneath the storage layer. The wicking layer is made of compressible wood fibers, wherein the ratio of the vertical wicking height of the wicking layer to the vertical wicking height of the storage layer is greater than 1.25, but is preferably about 3.0.
Abstract:
A method for manufacturing a laminated structure for use in an absorbent article such as a diaper, a sanitary napkin, a panty liner, an incontinence pad or similar and being defined by a plurality of material layers comprising at least a first layer which is liquid-permeable, a second layer constituting an absorbent core and a third layer, each of the layers being formed of a material having a certain pore radius. The method includes bonding together the material layers by means of at least two ultrasonic welding steps; and providing an ultrasonic welding pattern for each of the welding steps, each of the welding patterns being defined by a plurality of bonding sites. The method includes providing the welding steps for forming generally the entire absorbent article; and selecting the welding patterns in a manner so that at least the entire laminated structure has a multiple pore radius.
Abstract:
PROBLEM TO BE SOLVED: To provide an absorbent having water-absorbing fibers, which is adjusted in mainly the orientation of the fibers and further the basis weight and the shape. SOLUTION: The absorbent 110 is oriented vertically and laterally and contains the water-absorbing fibers. It has a low basis weight area which is continuously formed being oriented vertically with the basis weight lower than the average basis weight in the absorbent 110 and a high basis weight areas which are formed along the low basis weight area on both sides of the low basis weight area with the basis weight higher than the average basis weight in plurality. Each of the plurality of high basis weight areas makes the content of the vertically oriented fibers in the fibers 101 making up the high basis weight area higher than that of the laterally oriented fibers. Each of the plurality of low basis weight areas makes the content of the laterally oriented fibers in the fibers 101 making up the low basis weight area higher than that of the vertically oriented fibers. COPYRIGHT: (C)2008,JPO&INPIT