TREATED ODOR TRANSFER MEMBRANE Russian patent published in 2020 - IPC B01D71/26 B01D67/00 B01D69/06 C08L23/06 B32B27/32 

FIELD: chemistry.

SUBSTANCE: invention relates to a gas-permeable microporous membrane for odour transfer and a method for production thereof. Membrane contains a microporous membrane containing the first side and the second side opposite to the first side, where the membrane contains a thermoplastic organic polymer containing polyolefin. Polyolefin contains a polyolefin with ultrahigh molecular weight. Membrane has a network of interconnected pores, substantially interconnected through the membrane, essentially water-insoluble granular filler distributed on the membrane and making from 10 to 90 weight percent of the membrane in terms of the total weight of the membrane and granular filler. At least 90 weight percent of granular filler has particle size in range from 0.5 to 200 micrometres. Granular filler contains silicon particles containing granular silicon oxide. Membrane also contains a first hydrophobic/oleophobic material containing a copolymer containing a fluoroalkyl group on top of at least a portion of the first side. Polyolefin is at least 2 weight percent of the membrane with respect to the total weight of the membrane and the granular filler. Membrane has average pore size of up to 0.2 mcm.

EFFECT: obtaining an odour transfer device, which prevents swelling of liquid oil from the odour transfer device; design of an odour transfer apparatus which separates a uniform and proper amount of flavour throughout the life of the odour delivery device.

18 cl, 4 tbl, 13 ex, 3 dwg