| 摘要 |
1,259,315. Anti-static synthetic fibres; bonded fibre and tufted fabrics; yarns. TEIJIN Ltd. 29 May, 1969 [4 June, 1968], No. 27369/69. Headings D1K, D1P, D1R and D1W. Synthetic fibres are rendered anti-static and electrically conducting by applying a coating of thickness 0.5 to 15 microns comprising a mixture of acrylonitrile-butadiene copolymer and a phenolic resin the weight ratio of copolymer to resin being 0.4:1 to 4:1, the mixture having sufficient finely divided silver and/or carbon dispersed therein to lower the resistivity of the fibre to less than 10<SP>9</SP> ohm./cm. The conductive material may be present in an amount of 70-90% or 10-60% based on the weight of the coating for silver and carbon respectively and the copolymer may contain from 28- 42% by weight of acrylonitrile. Anti-static materials may be formed from blends of non- conductive synthetic fibres containing less than 2% by weight of the conductive fibres. The fibres may be coated by immersion in a paste formed from the copolymer, phenolic resin and conductive material in a volatile organic solvent, followed by heating to set the coating. In an Example, an antistatic nylon monofil was plied with every third, sixth, ninth or twelvth needle yarn of crimped continuous filament nylon in making a tufted carpet. In a further example a monofilament of the fibre material was incorporated in a tow with polyvinyl chloride filaments and this tow was crimped and cut to staple fibre 76 mm. long. The crimped conductive fibre retained its conductivity to an adequate degree. This staple fibre (70 parts) was blended with polyproylene staple fibre (30 parts), made into a web and then into several non-woven carpets by the needle punch method. |
