METHOD OF PRODUCING GAS-PERMEABLE MULTILAYER IMITATION LEATHER Russian patent published in 2011 - IPC B32B27/12 D06N3/14 D06N3/00 

FIELD: process engineering.

SUBSTANCE: invention relates to method of producing gas-permeable imitation multilayer leather, and imitation leather produced thereof. Said leather is made up of the layer of flat textile warp with, at least one foamed polyurethane-based intermediate layer applied there on that feature, at least, partially exposed porous structure, and face polyurethane-based layer applied on, at least, one intermediate layer. First stage of proposed method comprises applying face layer on peel-apart web. Then, at least one intermediate layer is applied onto face layer. Now, web layer is applied on, at least, one intermediate layer and web is separated from face layer. Note here that, to produce face layer, aqueous aliphatic polyurethane dispersion in liquid phase is applied onto web, and, immediately after applying said dispersion, water contained therein is evaporated by supplying heat thereto for 5 min, max., to facilitate drying of polyurethane dispersion on web without film formation and forming of face layer with micro pores.

EFFECT: small-sized pores, goo gas permeability.

39 cl, 4 dwg