Synthetic leather base material - of improved water holding capacity

• Main Authors: SINN,GUSTAV,DR, MATNER,MARTIN,DR, JOSEF BROSS,HERMANN
• Format: Patent
• Language: English; German
• Published: 05.08.1976
• Edition: 2
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BRAIDING; CHEMISTRY; COMPOSITIONS BASED THEREON; COTTON-WOOL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL PROCESSES OF COMPOUNDING; KNITTING; LACE-MAKING; LAUNDERING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; METALLURGY; NON-WOVEN FABRICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; TRIMMINGS; WADDING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL; WORKING-UP

Synthetic leather base material is obtd. from a rubber latex impregnated fleece and has a water holding capacity of 2-8 wt. % relative to the dry wt. of material, a tensile strength of 30-200 kg./cm2 and an extension at break of 30-150%. The latex mixt. contains a heat sensitive material, a quick acting vulcanisation accelerator and an emulsifying substance, insoluble and inert in the latex and remaining constituents of the latex. The mixt. in the fleece after impregnation is coagulated, vulcanised and finally dried. Vulcanisation is in the presence of steam. The synthetic leather base is microporous, and achieves 70-80% of the water holding capacity of natural leather.