METHOD FOR PREVENTING THE GRAYING WHICH APPEARS IN THE PRODUCTION AND PROMOTION OF WHITE-PIGMENTED, RIBLEABLE POWDER MIXTURES BASED ON POLYVINYL CHLORIDE.

摘要

1. Method for the prevention of greying occurring during the manufacture and conveyance of white pigmented pourable powder mixtures based on polymers containing polyvinyl chloride, characterised in that the surfaces of the devices used in such operations that are subject to stress by the powder mixtures are bored.