초록 ▼

The invention provides: a water-absorbent resin granule-containing composition with resolution of various problems, as caused by water-absorbent resin fine powders, and with high granulation strength, and with no physical property deterioration due to granulation, and, if anything, with improvement

The invention provides: a water-absorbent resin granule-containing composition with resolution of various problems, as caused by water-absorbent resin fine powders, and with high granulation strength, and with no physical property deterioration due to granulation, and, if anything, with improvement of the absorption capacity under a load by granulation; and a process for producing the above granule. A water-absorbent resin primary particle and a water-absorbent resin granule are separately surface-crosslinked and then mixed, or mixed and then surface-crosslinked. The granulation is carried out by mixing a preheated aqueous liquid and a water-absorbent resin powder at a high speed or by supplying a water-absorbent resin powder downstream of an aqueous liquid with a continuous extrusion mixer.

대표청구항 ▼

1. A process for granulating particles to produce granulated particles, with the granulated particles being greater in size than the particles, with the particles being water-absorbent resin particles, with the process comprising the steps of:a) providing a receptacle; b) providing a supply of the p

1. A process for granulating particles to produce granulated particles, with the granulated particles being greater in size than the particles, with the particles being water-absorbent resin particles, with the process comprising the steps of:a) providing a receptacle; b) providing a supply of the particles that have an average particle diameter of 10 to 150 .mu.m; c) providing a supply of aqueous liquid; d) controlling the aqueous liquid to a temperature of 40.degree. C. to the boiling point of the aqueous liquid prior to supplying the aqueous liquid to the receptacle; and e) mixing the aqueous liquid and particles in the receptacle at a high speed, with the step of mixing comprising the steps of: i) introducing the aqueous liquid to the receptacle while the aqueous liquid has a temperature of 40.degree. C. to the boiling point of the aqueous liquid; ii) introducing the particles to the receptacle; iii) bringing the aqueous liquid and particles into contact with each other while the aqueous liquid has a temperature of 40.degree. C. to the boiling point of the aqueous liquid and mixing the aqueous liquid and particles in the receptacle while the aqueous liquid has a temperature of 40.degree. C. to the boiling point of the aqueous liquid; iv) mixing the aqueous liquid and particles in the receptacle for at longest three minutes; and v) obtaining granulate particles not larger than 20 mm in diameter.