PROCEDIMIENTO PARA LA PRODUCCION DE ESPONJAS DE POLIURETANO HIDROFILAS, FLEXIBLES, ADAPTADAS PARA USO MEDICO.

摘要

1492898 Embossing AMERICAN CYANAMID CO 17 June 1975 [19 June 1974] 25850/75 Heading B6J A flexible hydrophilic sponge of polyurethane foam, adapted for medical use, is formed by embossing in a flat, polyurethane foam sheet a fused design comprising a series of continuous lines each line increasing a plurality of other lines to reduce its elasticity and by compressing the sheet, before or after embossing, so as to reduce its sponginess. Both steps may be carried out by passing between rollers.