UNE-EN ISO 21970-1:2020

This document establishes a system of designation for polyketone (PK) moulding and extrusionmaterials which may be used as the basis for specifications. Polyketone polymer chains are built up fromregularly alternating olefinic units and keto groups. The olefinic units shall be randomly distributedethylene and propylene.The types of polyketone plastics are differentiated from each other by a classification system basedon appropriate levels of the designatory properties, melting temperature, melt mass-flow rate,temperature of deflection under load and on information about the intended application and/or methodof processing, important properties, additives, colour, fillers and reinforcing materials.The designation system is applicable to all polyketone terpolymers and blends. It applies to materialsready for normal use in the form of powder, granules or pellets, unmodified or modified by colourants,fillers or other additives.It is not intended to imply that materials having the same designation give necessarily the sameperformance. This document does not provide engineering data, performance data or data on processingconditions which may be required to specify a material. If such additional properties are required, theyare intended to be determined in accordance with the test methods specified in ISO 21970-2, if suitable.In order to designate a polyketone to meet particular specifications, the requirements are to be given indata block 5 (see 4.1).