| 摘要 |
<p>Procedure for the production of magnetic plastic laminate in which at least one of the paper fiber sheets impregnated with phenolic and melaminic resins, is first of all spread, using the silk screen process, with a cloth with a weave of from 9 to 24 threads per cm<2>, with a ferrous powder based paste with a percentage comprised of between 55% - 80% and a binder with a percentage comprised of between 45% - 20%; after drying the percentage of ferrous powders is comprised of between 75% - 80%, the thickness of the paste of between 0,5 and 2,0 mm and the plastic laminate thus obtained is permanently magnetised through an electric charge thanks to the presence of the ferrous powders inside it.</p> |
