| 摘要 |
Sieve is made into a woven fabric from fibres composed of cotton, asbestos and synthetic fibres and the side of the sieve facing the cylinder is coated with a layer, heat reflecting layer composed of a polyester resin in which is dispersed pulverulent aluminium having a particle size distribution of from 3 to 7 microns. The wt. of the aluminium powder pref. correspondonds to 10 wt.%. |
