A method for preparing a hydrogel includes forming a pre-gel comprising polymer and metal salt particles, unidirectionally-shrinking and dehydrating the pre-gel, and impregnating the unidirectionally shrunk and dehydrated pre-gel with an ion solution to crosslink and rehydrate the unidirectionally shrunk and dehydrated pre-gel to produce the hydrogel.

The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 m or less, and a base resin having a particle size of 150 m or more and 850 m or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 m or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.

A method for preparing a hydrogel includes forming a pre-gel comprising polymer and metal salt particles, unidirectionally-shrinking and dehydrating the pre-gel, and impregnating the unidirectionally shrunk and dehydrated pre-gel with an ion solution to crosslink and rehydrate the unidirectionally shrunk and dehydrated pre-gel to produce the hydrogel.

The present disclosure relates to a preparation method of super absorbent polymer granules and super absorbent polymer granules prepared according to the same. More specifically, the preparation method of the present disclosure includes the steps of: forming a hydrogel polymer by carrying out a thermal polymerization or a photopolymerization of a monomer composition including a water-soluble ethylene-based unsaturated monomer and a polymerization initiator; drying and pulverizing the hydrogel polymer; classifying the pulverized polymer into a first fine powder having a particle size of 150 m or less, and a base resin having a particle size of 150 m or more and 850 m or less; surface-crosslinking the base resin; classifying the surface crosslinked base resin to separate a second fine powder having a particle size of 150 m or less; and forming fine powder granules by mixing the first fine powder, the second fine powder, and silica in a wet state.

A cylindrical film used in an image heating device heating a recording material, on which an image has been formed, has a resin layer, this resin layer being made from a resin in which a crystalline resin and an amorphous resin having a higher glass transition temperature than the crystalline resin are blended, wherein a volume ratio of the crystalline resin with respect to the amorphous resin in the resin layer is 70/30 to 99/1.

An ethylene-vinyl alcohol copolymer composition which suppresses coloring change due to thermal degradation during melt molding is provided. An ethylene-vinyl alcohol copolymer composition contains an ethylene-vinyl alcohol copolymer and a titanium compound, wherein the amount of the titanium compound on a metal basis is 0.001 ppm or more and less than 5 ppm per mass of the ethylene-vinyl alcohol copolymer composition.

A cylindrical film used in an image heating device heating a recording material, on which an image has been formed, has a resin layer, this resin layer being made from a resin in which a crystalline resin and an amorphous resin having a higher glass transition temperature than the crystalline resin are blended, wherein a volume ratio of the crystalline resin with respect to the amorphous resin in the resin layer is 70/30 to 99/1.

A cylindrical film used in an image heating device heating a recording material, on which an image has been formed, has a resin layer, this resin layer being made from a resin in which a crystalline resin and an amorphous resin having a higher glass transition temperature than the crystalline resin are blended, wherein a volume ratio of the crystalline resin with respect to the amorphous resin in the resin layer is 70/30 to 99/1.

A curable composition cured by irradiation with active rays. The content of a monofunctional polymerizable compound having a melting point of 25 C. or less is 5-50% by mass; the content of a polyfunctional polymerizable compound is 50-95% by mass. When a nanoindentation evaluator is used to press an indenter into a cured film (obtained by curing a coating film with an average thickness of 8 m by irradiation with an active ray at a cumulative light amount of 400 mJ/m.sup.2) by 100 nm in the thickness direction, P1 is a load amount required for pressing, and P2 is a load amount after the pressing is maintained for 2 seconds, the cured film satisfies conditions (1) and (2): (1) P2 is 20 N or less, and (2) A relaxation rate determined by an expression ((P1P2)/P1100) is 15% or more.

A crosslinker obtainable by reacting one or more compounds of general formula (II) with one or more compounds of general formula (III), wherein the crosslinker comprises a mixture of compounds of general formula (I), wherein Q is a radical of formula COO[X].sub.iR.sup.1, wherein each i is independently selected from integers between 1 and 50 for 35 mol % or higher of Q within the mixture, and i is equal to 0 for the remaining Q within the mixture, wherein each X is independently selected from the group consisting of CH.sub.2CH.sub.2O, CH.sub.2CH(CH.sub.3)O, CH(CH.sub.3)CH.sub.2O, CH.sub.2C(CH.sub.3).sub.2O, CH.sub.2CHVin-O, CHVin-CH.sub.2O, CH.sub.2CHPh-O, and CHPh-CH.sub.2O, in which Ph is phenyl and Vin is vinyl, and wherein each R.sup.1 is independently selected from the group consisting of C.sub.1-C.sub.30 hydrocarbyls.

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