GB/T 46829.1-2025 Plastics—Acrylonitrile-styrene-acrylate (ASA),acrylonitrile-(ethylene-propylene-diene)-styrene (AEPDS) and acrylonitrile-(chlorinated polyethylene)-styrene (ACS) moulding and extrusion materials—Part 1:Designation system and basis for specifications

Scope

This document specifies the naming system and classification basis for acrylonitrile-styrene-acrylate (ASA), acrylonitrile-(ethylene-propylene-diene)-styrene (AEPDS), and acrylonitrile-(chlorinated polyethylene)-styrene (ACS) thermoplastics. Different types of ASA, AEPDS, and ACS thermoplastics are distinguished based on the following specified characteristic performance values, as well as composition information, recommended applications and/or processing methods, key performance characteristics, additives, fillers, and reinforcing plastics: a) Vicat softening temperature; b) melt flow rate; c) notched impact strength of a simple beam; d) tensile modulus of elasticity. This document applies to all ASA, AEPDS, and ACS materials, which primarily consist of a styrene-acrylonitrile (SAN) copolymer as the continuous phase (where the styrene component may be styrene itself and/or alkyl-substituted styrene) and the following materials as the dispersed phase: a) acrylonitrile (ASA); b) ethylene-propylene-diene-monomer (EPDM) rubber (AEPDS); c) chlorinated polyethylene (ACS). These materials may or may not contain other components and quantities, as indicated in Character Group 1. This document applies to materials that are typically supplied in powder, granule, or crushed form, either unmodified or modified with colorants, additives, fillers, etc.

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