Bor-, Mubor-Es Cipoipari Kutato Intezet

Graboplast Gyori Pamutszovo-Es Muborgyar

Gyula Murlasits

Ivan Lorant

Imre Csernyanszky

Rezso Rusznyak

Paula Szabo Nee Paulyuk

Gyula Wlasitsch

Ferenc Farkas

Geza Szomolanyi

A process for the production of chemically bonded non-woven material, such as synthetic leather, is disclosed wherein a fiber fleece is impregnated with a heat sensitized polymer dispersion and the composition is destabilized to form a porous gel structure. Finally, the polymer is crosslinked at below 150.degree. C. and is dehydrated. Additionally, cut fibers of polyester of polyamide are formed into a fleece and an aqueous dispersion of butadiene-styrene coagulant and a curing composition is impregnated through the fleece. The binder is gelled and cured in superheated steam. The products obtained are soft and possess excellent physical and mechanical properties as well as superior dynamic stressability.

Process for the production of chemically bonded non-woven sheet

The specification describes water vapor-permeability sheet materials, particularly useful in the footwear industry. The production of sheet materials which are water permeable, highly resistant to wear, water resistant and mechanically stressable occurs by mechanically foaming a polymeric dispersion, the mechanical foaming being carried out in the presence of a surfactant, the density of the film being adjusted by the mechanical foaming to 0.55-0.85 g/cm.sup.3, gelling the foamed dispersion at a temperature of 120.degree. to 220.degree. C., for at most 10 minutes, and finishing the sheet material by spraying and/or rastering.

Process for the production of water vapor-permeable sheet materials

Growing community of inventors

Budapest, Hungary

Gyula Murlasits