Bor-, Mubor-Es Cipoipari Kutato Intezet

Graboplast Gyori Pamutszovo-Es Muborgyar

Bor-, Cipo-, Szormeipari Kutato Intezet

Vseojuzny Nauchno-Issledovatelsky Institut Plenochnykh Materialov I

Ivan Lorant

Gyula Murlasits

Jeno Keszei

Jeno Donath

Albert Balazsfai

Geza Szomolanyi

Vsevolod Andreevich Mikhailov

Jury Alexandrovich Smetkin

Erno Bolcskei

Imre Csernyanszky

Gyozo Seltenreich

Rezso Rusznyak

Ferenc Farkas

Paula Szabo Nee Paulyuk

Boris Nisonovich Dinzburg

Vladimir Iosifovich Alexeenko

Gyorgy Marton

Gyula Wlasitsch

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

Press molds for vulcanizing plastic materials comprise a pair of mold parts defining between them a mold cavity. One of the parts is a die and the other is a cover plate that defines with the die the mold cavity. A hot liquid is introduced into a lower portion of the mold cavity through the die and gas is removed from the upper portion of the mold cavity through the cover plate. As a result, both prevulcanization and after vulcanization can be achieved in one single press mold, by surrounding the material in the mold with hot liquid in the prevulcanization and then withdrawing the liquid when the molded material fills the die cavity in the second stage of vulcanization.

Press mold for producing microcellular shaped pieces of dimensional

Growing community of inventors

Budapest, Hungary

Ivan Lorant