Water absorbent resin powder
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United States of America Patent
Stats
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Apr 21, 2020
Grant Date -
Sep 12, 2019
app pub date -
May 29, 2019
filing date -
Aug 28, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
Provided is a water absorbent resin that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having a higher liquid permeability and a higher water absorbing speed. Further provided is a water absorbent resin powder that is useful to sanitary materials such as a disposable diaper, a sanitary napkin, and a blood absorbent for medical use each having increased in absorbency of a liquid and in heat retaining property. A gel grinding device to be used to produce a water absorbent resin, includes: a screw; a feed opening; an extrusion opening; a porous plate; and a barrel, the barrel including a return preventing member provided on an inner surface thereof, and the return preventing member satisfying at least one of specific parameters.
First Claim
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International Classification(s)
- C08J:WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTE....
- B02C:CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERA....
- C08F:MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONL....
- B29C:SHAPING OR JOINING OF PLASTICS; SHAPING OF SUBSTAN....
- B29B:PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE ....
- B01J:CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS, CO....
- B29K:INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, ....
- A61L:METHODS OR APPARATUS FOR STERILISING MATERIALS OR ....
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