| 摘要 |
1278893 Laminates FARBENFABRIKEN BAYER AG 29 April 1970 [21 May 1969] 20530/70 Heading B5N [Also in Division C3] Laminates may be produced having as one layer a microporous sheet prepared by processing on a calender 100 p.b.w. of a thermoplastic polyurethane elastomer, 60 to 150 p.b.w. of sodium bicarbonate and 3 to 15 p.b.w. of an organic aliphatic carboxylic acid which has a M.W. of 150 to 5000 and an acid number of at least 2À5 and washing the film obtained with water. Preferred carboxylic acids are fatty acids such as stearic, palmitic, myristic and oleic acids, oxidized polyethylene waxes, montannic acid waxes and partially saponified ester waxes. The cylinder temperature of the heated calender is suitably 110‹ to 220‹ C. Suitable substrates are textile fabrics, bonded unwoven fibre structures, leather and paper. In examples, bonded unwoven fibrous structures and cotton fabrics are used.
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