| 摘要 |
<p>The aromatic polyamide film (1) contains 10-40 wt.% of carbon black and is specified as follows: thickness (t) = 1-10 micro.m, surface (electric) resistance (Rs) = Rs x t = above 2-100 kohms/square (better Rs x t = 3-7 kohms/square), strength in at least one direction = 8 Kg/square mm, dimensional change at 200 deg.C under a load of 1 Kg/square mm = up to 5%, the surface ratio of the carbon black lies between 5 square m/g and 1000 square m/g. The meaparticle size of the prim. particles of the carbon black is 10-100 micro.m. The one dimensional stretching coefft. of the polyamide film is 10% or more. The hydrate absorbance of the polyamide film is 4% or less. This medium is produced by an electrical heat-transfer process.</p> |
