| 摘要 |
1,274,645. Coated wire. BAKELITE XYLONITE Ltd. 18 July, 1969 [19 July, 1968], No. 34508/68. Heading B2E. [Also in Division C3] Wire is insulated by extruding around it a cellular covering made from an expandable composition comprising: (a) 100 parts by weight of a low density ethylene polymer having a density not exceeding 0.935 grams/cc and a melt flow index (as defined) up to 7; (b) from 1 to 30 parts by weight, based on the weight of the low density ethylene polymer, of an ethylene polymer and/or polypropylene having a density above 0.939 grams/cc and a melt flow index (as defined) up to 20; and (c) from 0.1 to 5 parts by weight, based on the weight of the low density ethylene polymer, of a blowing agent with a decomposition temperature equal to or greater than 150‹C. In example 1 a copper wire is insulated with the above cellular covering.
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