Patent application number | Description | Published |
20080280154 | Process for Producing Water-Absorbing Resin Particles, Water-Absorbing Resin Particles Made by the Process, and Absorbent Materials and Absorbent Articles Made by Using the Particles - The present invention provides a process for producing water-absorbing resin particles which possess a high water retention capacity (absorbing capacity), a high water-absorbing capacity under pressure, and a high gel strength and a small amount of water-soluble substance and is favorably usable in sanitary materials; water-absorbing resin particles obtained by the process; and absorbent materials and absorbent articles made by using the particles. More specifically, the water-absorbing resin particles are produced by a process for producing water-absorbing resin particles, comprising a step of a post-crosslinking reaction by adding a post-crosslinking agent in at least two stages to a water-absorbing resin particle precursor obtained by polymerization of a water-soluble ethylenic unsaturated monomer to carry out the post-crosslinking reaction. | 11-13-2008 |
20090281247 | PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN PARTICLE, AND WATER-ABSORBABLE RESIN PARTICLE PRODUCED BY THE PROCESS - The present invention relates to a method of producing water-absorbent resin particles in which a median particle size of primary particles (d) and a median particle size of secondary particles (D) satisfy the relationship of the formula, 5d/3+15011-12-2009 | |
20090326162 | PROCESS FOR PRODUCTION OF WATER-ABSORBABLE RESIN - A method for producing a water-absorbent resin, characterized in that a precursor of the water-absorbent resin obtained by polymerizing a water-soluble ethylenically unsaturated monomer is subjected to a post-crosslinking reaction in the presence of a compound having plural hydrazide groups. The water-absorbent resin obtained by the method for producing a water-absorbent resin of the present invention is excellent in properties such as water-retention capacity, water-absorption capacity under load, and gel strength, and also gives consideration to safety of the water-absorbent resin by reducing water-soluble substance. Therefore, the water-absorbent resin of the present invention can be suitably used, for example, in hygienic materials such as disposable diaper, incontinence pad and sanitary napkin, in particular, in disposable diaper. | 12-31-2009 |
20100197491 | METHOD FOR PRODUCTION OF WATER-ABSORBABLE RESIN, AND WATER-ABSORBABLE RESIN PRODUCED BY THE METHOD - A method for producing a water-absorbent resin, characterized by adding a bisoxetane compound represented by the following general formula (1): | 08-05-2010 |
20110111199 | WATER-ABSORBENT SHEET COMPOSITION - A water-absorbent sheet composition comprising a structure in which a water-absorbent resin and a hot melt adhesive are sandwiched with two or more sheets of hydrophilic nonwoven fabrics, wherein the hydrophilic nonwoven fabrics have a basis weight of 30 g/m | 05-12-2011 |
20110151228 | WATER-ABSORBENT SHEET COMPOSITION - A water-absorbent sheet composition comprising a structure in which a water-absorbent resin and a hot melt adhesive are sandwiched with two or more sheets of hydrophilic nonwoven fabrics, wherein the hydrophilic nonwoven fabrics have a basis weight of 25 g/m | 06-23-2011 |
20110270204 | WATER-ABSORBENT SHEET COMPOSITION - A water-absorbent sheet composition containing a structure in which an absorbent layer containing a water-absorbent resin and an adhesive is sandwiched with two or more sheets of hydrophilic nonwoven fabrics, wherein the water-absorbent sheet composition has a structure in which the absorbent layer is separated in divided parts of a primary absorbent layer and a secondary absorbent layer with a water-permeable substrate having a water permeability index of from 20 to 90, and wherein the water-absorbent resin is contained in the absorbent layer in an amount of from 100 to 1000 g/m | 11-03-2011 |
20110276019 | WATER-ABSORBENT SHEET COMPOSITION - A water-absorbent sheet composition ( | 11-10-2011 |
20120089108 | WATER ABSORBENT SHEET - A water-absorbent sheet comprising a structure in which an absorbent layer containing a water-absorbent resin and an adhesive is sandwiched with a hydrophilic nonwoven fabric, wherein the water-absorbent sheet has a structure in which the absorbent layer is fractionated into a primary absorbent layer and a secondary absorbent layer with a substrate layer formed by laminating two or more layers of a substrate having breathability adhered together with an adhesive, wherein the substrate layer satisfies the following requirements (1) and (2): (1) the substrate layer having a basis weight of 25 g/m | 04-12-2012 |