# ISO 21970-1:2018 — Withdrawn and superseded ISO standards

For ISO 21970-1:2018, item title is Plastics — Polyketone (PK) moulding and extrusion materials — Part 1: Designation system and basis for specifications; status code is 9599; successor is ISO 21970-1:2019; withdrawn / published date is 2018-08-23, recorded from its source on 2026-08-05.

- **Identifier:** ISO 21970-1:2018 _(verified: appears in the quote below)_
- **Item title:** Plastics — Polyketone (PK) moulding and extrusion materials — Part 1: Designation system and basis for specifications _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO 21970-1:2019
- **Withdrawn / published date:** 2018-08-23 _(verified: appears in the quote below)_

## What the source says

> 72322,IS,,ISO 21970-1:2018,Plastics — Polyketone (PK) moulding and extrusion materials — Part 1: Designation system and basis for specifications,Plastiques — Polycétone (PK) pour moulage et extrusion — Partie 1: Système de désignation et base de spécification,2018-08-23,1,['83.080.20'],ISO/TC 61/SC 9,9599,,[77533],"['en','fr']",8,"<p>This document establishes a system of designation for polyketone (PK) moulding and extrusion materials which may be used as the basis for specifications. Polyketone polymer chains are built up from regularly alternating olefinic units and keto groups. The olefinic units shall be randomly distributed ethylene and propylene.</p><p>The types of polyketone plastics

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).