DIN EN ISO 29988-1-2018 塑料.聚甲醛模塑和挤塑材料.第1部分:命名体系和基本规范(ISO 29988-1-2018); 德文版本 EN ISO 29988-1-2018
Plastics - Polyoxymethylene (POM) moulding and extrusion materials - Part 1: Designation system and basis for specifications (ISO 29988-1:2018); German version EN ISO 29988-1:2018
This part of the standard establishes a system of designation for polyoxymethylene (POM) thermoplastic materials, which may be used as the basis for specifications. Polyoxymethylene materials are thermoplastic materials composed principally of long-chain synthetic homopolymers and copolymers of formaldehyde. The repeating unit in the molecular chain is - CH20 - as an integral part of the main polymer chain resulting from polymerization of formaldehyde.