DIN EN ISO 1622-1:2012-05

DIN EN ISO 1622-1 establishes a system of designation for polystyrene thermoplastic material, which may be used as the basis for specifications. The types of polystyrene plastics are differentiated from each other by a classification system. This classification system is based on appropriate levels of the designatory properties, such as a) Vicat softening temperature and b) melt volume-flow rate and on information about the intended application and/or method of processing, important properties, additives and colorants. DIN EN ISO 1622-1 is applicable to all amorphous polystyrene homopolymers. It applies to materials ready for normal use, unmodified or modified by colorants, additives, fillers, etcetera. This part of ISO 1622 does not apply to expanded polystyrene, styrene copolymers, homopolymers of substituted styrene or those modified with other polymers such as elastomers. In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5. ISO/FDIS 1622-1:2011 has been prepared by ISO/TC 61/SC 9 "Thermoplastic polyesters" (secretariat: ANSI, USA). CEN/TC 249 "Plastics", the secretariat of which is held by NBN (Belgium), is responsible for the European final draft. On the national level, the committee responsible for this standard is NA 054-02-04 AA "Polystyrol-Formmassen" ("Polyamide thermoplastic material") at DIN.