| 摘要 |
PURPOSE:To obtain the titled resin with low impurity and fish eye contents, by making all the packings and ducts associated with the process from the feed lines of materials to the delivery line of the final product, using metals or synthetic plastics. CONSTITUTION:A vinyl chloride resin is produced by using equipment in which all the packings and ducts associated with the process from the feed lines of materials, a polymerization tank to the delivery line of the final product downstream of the polymerization tank are made of or coated with metals or synthetic resins. EFFECT:It is possible to obtain a molding of uniform electrical and mechanical properties, because no gel is formed when molding the resin. USE:High-density recording medium.
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