WATER ABSORBING RESIN PARTICLES
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United States of America Patent
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Issued Date -
May 12, 2022
app pub date -
Mar 5, 2020
filing date -
Mar 5, 2020
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Disclosed are water-absorbent resin particles having a gel outflow test force measured by the following method of 5 to 14 N. The measuring method for gel outflow test force includes: producing a swollen gel by allowing the water-absorbent resin particles to absorb 29 times as amount of physiological saline as the water-absorbent resin particles under stirring; evenly putting 20 g of the swollen gel in a cylinder with an inner diameter of 5 cm and having a hole with a diameter of 5 mm at a bottom part, compressing the swollen gel in the cylinder at a rate of 10 mm/min with a jig with a diameter of 4.9 cm, thereby recording a test force at a time point when a part of the swollen gel flows out from the hole at the bottom part of the cylinder, as the gel outflow test force.
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