Abstract: A process for flatting a glossy polyurethane surface is disclosed. The process involves the steps of forming a wear layer on a carrier member, such comprising a polyurethane-forming composition. The coated carrier member is then treated with vaporous water at a temperature below the dew point of the vaporous water so that a film of liquid water is deposited on the surface of the coating. The coating with the liquid water deposited thereon is then cured to a tack free state and then subjected to elevated temperatures where the curing of the polyurethane coating is completed.

Abstract: A porous sheet material made of a polymeric material comprising mainly a polyurethane elastomer, which comprises a base layer of vertically penetrating vesicular structure and a surface layer of microporous structure integrally provided on at least one of the surfaces of the said base layer, which is suitable for the manufacture of a leather-like sheet product.

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.

Abstract: Method of making a leather-like sheet material having a low bounce impact elasticity, which comprises: (a) mixing (i) a solvent solution of a polymer (A) consisting mainly of an elastomer and (ii) a dispersion in a liquid of a polymer (B) consisting mainly of an elastomer, thereby obtaining a composite solution containing fine particles of (B) dispersed in a solution of polymer (A); (b) coating a sheet or impregnating a fibrous mat substrate with the composite solution; (c) immersing the substrate in a coagulation bath to deposit and coagulate both polymers; and (d) drying said sheet or mat.

Abstract: A process for the manufacture of non-woven fabric which comprises the following steps:A. impregnating a web of non-woven fibers with a chemical binder capable of thermal polymerization and with a curing agent for the binder,B. coagulating but not drying the binder, to form a non-woven fabric,C. coating one face of the fabric with a paste or foam of a waterproofing agent,D. drying the impregnated and coated fabric andE. heat embossing the non-coated face of the fabric; non-woven fabric whenever made by the above process.

Abstract: Method for producing a thermoplastic resin film or sheet useful for chelate color printing which involves contacting at least one surface of a thermoplastic resin film or sheet with a mixed liquid composition comrising (i) a liquid capable of dissolving or swelling said thermoplastic resin, (ii) a liquid having no ability to dissolve or swell said thermoplastic resin, being compatible with said liquid (i) and having a faster rate of evaporation than said liquid (i), and (iii) an inorganic compound containing at least one metal atom selected from the group consisting of iron, vanadium, titanium, molybdenum and tungsten, or an organic compound capable of forming a chelate compound with the metal atom and developing a color, and evaporating off said liquids (i) and (ii), thereby to form a porous surface layer of the film or sheet to which is adhered an uppermost chelate color printing layer comprising said inorganic or organic compound (iii).

Abstract: Polymer-liquid composite materials, particularly of cellulosic polymers such as cellulose nitrate, are described, which materials are strong, transparent, ultramicroporous materials characterized by a diffusion-supporting liquid phase of about 70% or more liquid within an interpenetrating, form-retentive, solid polymer phase. The materials are prepared by precipitation from a hydrogen-bonding solvent solution by the use of a miscible nonsolvent at temperatures generally below about 45.degree. C.

Abstract: A process for the production of polyurethane solutions by reaction of a diisocyanate with a mixture of a glycol and a polymer bearing terminal hydroxy groups in a solvent medium under certain prescribed conditions. The resulting polyurethane solutions are especially valuable as impregnants or coating agents for textile substrates, for example in the preparation of a microporous synthetic leather.

Abstract: A fiber web made by the wet method on a paper making machine is impregnated with a heat sensitized, foamed latex binder as the web passes through a screening area of the paper making machine.

Abstract: Process for pre-strengthening a non-woven textile fibre fleece obtained by the wet process wherein a heat-sensitive latex mixture whose coagulation point does not substantially change on dilution is applied in a finely divided form to the surface of the wet fleece and the fleece is then heated to a temperature at which the latex mixture coagulates to form a gel-like film.

Abstract: Describes procedure for deposition of microporous grain layer in and on a substrate for the production of leather replacement products in which the deposition liquid diffuses upwardly through the substrate to deposit the polymer from a solution thereof which has been laminated and coated on the top surface of the substrate.

Abstract: A water vapor permeable artificial leather material is disclosed which consists essentially of tough microporous elastomeric polymer material free from fibrous reinforcement having a thickness of at least 0.8 mm and a microporous appearance modifying surface layer or finish.

Abstract: There is disclosed a water vapor permeable shoe upper material having at least three layers, the density, thickness and structure of the layers having a defined novel relationship whereby an improved cut tear to stiffness relationship is achieved.

Abstract: This invention relates to a fiber fleece based on synthetic fibers and containing a polymeric organic reinforcing material, and having, at a proportion of polymeric elastic reinforcing material of at least 10 per cent by weight and not more than 80 per cent by weight, calculated on the total weight of a base fleece having a density between 0.1 and 0.28 g/cm.sup.3, a tensile strength of at least 0.01 kg/mm.sup.2, a tear propagation resistance of at least 7 kg/mm (according to IUP 8), and a tensile stress or not more than 0.03 kg/mm.sup.2, measured in a tensile elongation test at an elongation of 10 per cent.

Abstract: Reversibly moisture-vapor-absorptive sheet materials and a process for their manufacture in which water-soluble polymers of vinyl ethers are combined with base materials and crosslinked thereon.

Abstract: A sheet material having a microporous surface of elastomeric polyurethane is treated to produce a sheet, which has greater water-proofness and still transmits water vapor, by applying to it a coagulated layer of elastomeric polyurethane. Preferably the coagulated layer is produced by applying a pigmented polyurethane solution to the sheet while it is wet with a non-solvent. The coagulated layer may then be treated in various ways; e.g. it may be embossed or treated with a solvent to form a fused glossy moisture vapor-transmitting surface. The product is suitable for use as a leather substitute in shoe uppers.