GB/T 7690.2-2001
Reinforcements--Test method for yarns Part 2: Determination of twist (English Version)

Standard No.: GB/T 7690.2-2001
Language: Chinese, Available in English version
Release Date: 2001
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Status: Be replaced 2014-08
Replace By: GB/T 7690.2-2013
Latest: GB/T 7690.2-2013

Scope: This standard specifies the method for measuring the twist of glass fiber, carbon fiber and aramid fiber yarn. This standard applies to single yarn (primary twist), plied yarn or cable (two or more twists). For plied yarns and cables, this method is generally only applicable to the determination of the final twist. This method is suitable for winding yarn. If the sample is beam yarn (warp yarn) or yarn drawn from the fabric, the test results are for status indication only. This method is not applicable to staple fiber products.

GB/T 7690.2-2001 history

2013 GB/T 7690.2-2013 Reinforcements.Test method for yarns.Part 2:Determination of twist
2001 GB/T 7690.2-2001 Reinforcements--Test method for yarns Part 2: Determination of twist