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This part of ISO 19062 establishes a system of designation for acrylonitrile-butadiene-styrene (ABS) moulding and extrusion materials, which may be used as the basis for specifications.The types of ABS plastic are differentiated from each other by a classification system based on appropriate levels of the designatory properties:a) Vicat softening temperature;b) melt mass-flow rate;c) Charpy notched impact strength;d) tensile modulus;and on information about composition, intended application and/or method of processing, important properties, additives, colorants, fillers, and reinforcing materials.This part of ISO 19062 is applicable to all acrylonitrile-butadiene-styrene materials consisting of a continuous phase based mainly on copolymers of styrene (and/or alkyl-substituted styrene) and acrylonitrile and a dispersed elastomeric phase based mainly on polybutadiene, plus other components, in such quantities as specified in the text.It applies to ABS materials ready for normal use in the form of powder, granules, pellets or chips, unmodified or modified by colorants, additives, fillers, etc.