Process for producing finished and/or irreversibly embossed microporous sheet structures
AssigneesChemie-Anlagenbau Bischofsheim GmbH, Reuter Technologie GmbH
InventorKarl Heinz Hilterhaus
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Abstract
This invention relates to a process for producing finished and/or irreversibly embossed microporous sheet structures by coagulation of a polyurethane solution, in which prior to the coagulation of the polyurethane solution a finishing agent is mixed into it or a finishing agent is applied to the free surface of the polyurethane solution which has been spread out flat and embossing is then carried out during or shortly after the coagulation or after the washing, but still before the drying, or else the microporous sheet structure obtained and into which the finishing agent has been mixed previously is, after drying, pressed between two plates or passed under pressure between at least two oppositely rotating rolls, at least one of which is highly polished.
Claims18
In a method of producing microporous sheet structure having the appearance of artificial leather by coagulation of a polyurethane solution in which a coagulatable polyurethane solution is coagulated, washed, and dried, and in which a finishing agent for making artificial leather is utilized for making a leather appearance, the improvement wherein the polyurethane solution is spread out flat such that it has a free upper surface and wherein said finishing agent for making artificial leather is applied to the free surface of the polyurethane solution which has been spread out flat and before coagulation thereof to achieve a leather appearance without a subsequent finishing step.
Dependencies are inferred from the claim text.