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  • BSI
    BS EN ISO 20028-1:2019 Plastics. Thermoplastic polyester (TP) moulding and extrusion materials - Designation system and basis for specification
    Edition: 2019
    $316.70
    / user per year

Description of BS EN ISO 20028-1:2019 2019

This document establishes a system of designation for thermoplastic polyester (TP) material, which can be used as the basis for specifications. It covers polyester homopolymers for moulding and extrusion based on poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT), poly(cyclohexylenedimethylene terephthalate) (PCT), poly(ethylene naphthalate) (PEN), poly(butylene naphthalates) (PBN) and other TP-types and copolyesters of various compositions for moulding and extrusion.

The types of thermoplastic polyester are differentiated from each other by a classification system based on appropriate levels of the designatory properties:

  1. viscosity number;

  2. tensile modulus of elasticity;

and on information about the intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials.

This designation system is applicable to thermoplastic polyester homopolymers and copolymers. It applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or modified by colorants, fillers and other additives. This document does not apply to the saturated polyester/ester and polyether/ester thermoplastic elastomers covered by ISO 20029.

It is not intended to imply that materials having the same designation give necessarily the same performance. This document does not provide engineering data, performance data or data on processing conditions which can be required to specify a material. If such additional properties are required, they are intended to be determined in accordance with the test methods specified in ISO 20028-2, if suitable.

In order to designate a thermoplastic polyester material to meet particular specifications, the requirements are to be given in data block 5 (see 4.1).



Standard NumberBS EN ISO 20028-1:2019
TitlePlastics. Thermoplastic polyester (TP) moulding and extrusion materials - Designation system and basis for specification
StatusDefinitive
Publication Date2019-11-06
ReplacesBS EN ISO 20028-1:2017
Identical National Standard OfEN ISO 20028-1
DescriptorsModulus of elasticity, Polyesters, Thermoplastic polymers, Extruding, Fillers, Data blocks, Designations, Codes, Symbols, Polymers, Moulded materials, Viscosity, Chemical composition, Reinforcing materials, Plastics, Physical properties of materials, Moulding (process)
ICS83.080.20 Thermoplastic materials
CommitteePRI/82
ISBN978 0 539 01651 2
PublisherBSI
Pages22

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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