Plastics -- Unplasticized poly(vinyl chloride) (PVC-U) moulding and extrusion materials -- Part 1: Designation system and basis for specifications
This standard has been revised by ISO 21306-1:2019
Gives a system of designation for unplasticized polyvinyl chloride (PVC-U) moulding and extrusion materials which may be used as the basis for specifications. Applicable to all unplasticized polyvinyl chloride compositions that contain at least 50 % m/m of vinyl chloride. Does not apply to cellular plastics. Replaces the second edition.