The present disclosure relates to a composition of super absorbent polymer and a preparation method thereof, and more specifically, a composition of super absorbent polymer and a preparation method thereof, that may improve deodorization capacity and odor masking capacity by using specific additives in combination, to effectively inhibit odor generated from urine, and the like, when applied to a product such as a diaper, and the like, and bacteria growth during wearing of a product.

Method and apparatus (10) for controlling a modification process of hygroscopic material (15) comprising method steps of: measuring at least one process variable from the modification process at least during the modification; measuring at least one process variable from the hygroscopic material at least during the modification; calculating at least one intermediate control parameter by a neural network busing at least the measured process variables as input parameters of the neural network; and controlling the modification process by using genetic algorithms and genetic programming based on the said at least one intermediate control parameter determined by the neural network.

There is provided a method for producing water-absorbent resin particles, which have good general water absorption performance (for example, physiological saline absorption amount) required for a water-absorbent resin, and also have reduced yellowing under high temperature and high humidity and have high gel stability. A method for producing water-absorbent resin particles comprising, in the following order: step 1 of polymerizing a water-soluble ethylenically unsaturated monomer to obtain hydrous gel particles; step 2 of adding a chelating agent, a sulfite-based compound, and an organic antioxidant to the hydrous gel particles; and step 3 of subjecting the hydrous gel particles to a surface-crosslinking treatment, wherein in step 2, a water content in the hydrous gel particles when adding the sulfite-based compound is 20% by mass or more and 75% by mass or less.

Disclosed is a pant type absorbent article comprising a core chassis and a leg gasketing system comprising a pair of wearer facing cuff regions comprising an inner cuff sealing and inner cuff free edge positioned inward from the inner cuff sealing, and an inner cuff elastic element is disposed adjacent the inner cuff free edge; a pair of garment facing cuff regions, and a pair of outer cuff elastic elements disposed on wearer facing cuff regions or garment facing cuff regions, each outer cuff elastic element disposed so as to superpose the core side regions and so as to superpose the inner cuff sealings or outward thereof; and wherein the front belt and the absorbent body is joined in a manner such that the front longitudinal end of the outer cuff elastic element in active elasticity superposes the front belt and left unjoined to the front belt.

A particulate water-absorbing agent composition having a high caking resistance performance can be obtained without deteriorating water-absorbing performance under pressure by a method for producing a particulate water-absorbing agent composition, the method including, in at least one step selected from a monomer aqueous solution preparation step, a polymerization step, and an optional hydrogel grinding step, adding a water-soluble polyalkylene glycol having a mass-average molecular weight of 3000 or less in an amount of from 0.01 mass % to 0.25 mass % with respect to a total mass of monomers contained in the monomer aqueous solution, and after the surface crosslinking step, adding a nonionic polymer having a polyalkylene glycol chain in a structure and having a mass-average molecular weight of from 300 to 15000 in an amount of from 0.02 mass % to 0.40 mass % with respect to a water-absorbent resin that has been surface-crosslinked.