ASTM D4724_D4724M-21
Standard Test Method for Entanglements in Filament Yarns by Needle Insertion
| Označení normy: | ASTM D4724_D4724M-21 |
| Vydáno: | 01.01.2021 |
| Status: | Active |
| Počet stran: | 6 |
| Sekce: | 07.02 |
| Označení: | entanglement; yarn; |
| ASTM označení: | ASTM D4724/D4724M |
| Nahrazuje: | D4724_D4724M-20 |
1.1 This test method covers two options for the measurement of entanglements in filament yarns using needle insertion options for instrument (Option 1) (Option 2) techniques.
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.