Absorbent structures comprising coated super-absorbent polymer particles

摘要

This invention is directed to super-absorbent material, which comprises a super absorbent polymer core that is coated with an organic, polar coating agent, and whereby the particulate super-absorbent material has a contact angle and a corresponding cos CAm (as defined herein), whereby the cos CAm is more than 0.3, and whereby, when said coating agent is in the form of particles, said coating agent particles have a (weight) mean particle size of from 0.001 to 1 micron. The material is useful for absorbent structures and absorbent articles (comprising such structures). The coated super-absorbent material is typically present in said absorbent structure at least at a concentration of 50% by weight of the structure, preferably even 80% or even 90%. The invention also provides a process for making the absorbent material.

主权项

1. An absorbent article comprising an absorbent structure, said absorbent structure comprising a particulate super-absorbent material comprising a particulate core of super-absorbent polymers, said particulate core coated with a coating agent comprising an organic coating compound which has one or more polar groups, and wherein the coated particulate super-absorbent material has a contact angle and a corresponding cos CAm, wherein the cos CAm is greater than 0.3 and has a specific surface area of at least 0.25 m2 per gram, further wherein there is a gradient of coated super absorbent material within the total superabsorbent material of the absorbent structure, and wherein the absorbent structure comprises less than 10% by weight of absorbent fibers.