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US 8,541,643 B2Granted
Superabsorbents, nanofiber nonwovens finished therewith and use thereof
AssigneeSchill & Seilacher GmbH & Co.
InventorsHorst Ring, Roland Harbig
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AssigneeSchill & Seilacher GmbH & Co.
InventorsHorst Ring, Roland Harbig
Estimating the term…
The invention relates to a superabsorbent powder consisting of polymer particles which have a core swelling in the presence of water and a superficially postcured shell, in which the powder is a screening fraction of such polymer particles which have not been crushed after the superficial postcure of their shell. This superabsorbent powder is especially suitable for the finishing of textile webs made of super-fine fibers or filaments with a diameter of less than 10 μm, in particular for the finishing of sanitary products. There is further proposed the use of a nanofiber nonwoven, finished with a superabsorbent for the absorption and retention of hydrophilic fluids, for the absorption and/or sustained release of at least one of the following fluids: body fluids, sweat of humans and animals, water, including cooling water, condensation water and water vapor, chemicals, including agrochemicals and pesticides, pharmaceuticals, biocides, germicides and fungicides, diagnostics, fire protection and fire extinguishing agents, cleaning agents, hydraulic fluids, heating and cooling fluids, sewage, including radioactively contaminated fluids, perfumes.
A process for the finishing of textile webs comprising combining a textile web with a superabsorbent powder wherein the superabsorbent powder comprises polymer particles having a core swelling in the presence of water and a superficially postcured shell;
A process for finishing a nanofiber nonwoven for the absorption and retention of hydrophilic fluids comprising combining said nonwoven with a superabsorbent powder consisting of polymer particles which have a core swelling in the presence of water and a superficially postcured shell, wherein said powder is surface cross-linked to form said superficially postcured shell and thereafter screened to a screening fraction of such polymer particles with an intact core/shell structure after the superficial postcure of their shell, said screening fraction of said powder having a grain size distribution of d50=55 to 100 μm and d100=100 to 150 μm, and wherein said nanofiber nonwoven is formed of super-fine fibers or super-fine filaments having a diameter of less than 1 μm so as to allow at least one of the following fluids to be uptaken by and/or sustainedly released from said nanofiber nonwoven:
Dependencies are inferred from the claim text.