ABSORBING PRODUCT CONTAINING LAYER OF AIR-PERMEABLE MATERIAL Russian patent published in 2011 - IPC A61F13/514 

FIELD: medicine.

SUBSTANCE: invention relates to absorbing products for absorption of organism excretion. Absorbing product such as diaper, sanitary napkin, means used in case of incontinence, absorbing underpants or padding contains absorbing structure and air-permeable material of back layer, in which, at least, part of said layer contains polymer material, able to change its free volume very rapidly in response to any of the following conditions or factors: contact with liquid, presence of specific ions, temperature and/or pH. One of examples of such polymer materials is liquid-crystalline polymers with side chains, which can undergo phase transition between isotropic and nematic phases. Intermittent changes of free volume will result in sharp change of permeability of air-permeable layer material.

EFFECT: obtaining improved absorbing product.

8 cl, 1 tbl, 1 dwg