GB/T 7690.5-2001
Reinforcement--Test method for yarns Part 5: Determination of fibre diameter for glass fibre (English Version)

Standard No.: GB/T 7690.5-2001
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 2014-06
Replace By: GB/T 7690.5-2013
Latest: GB/T 7690.5-2013

Scope: This standard specifies two methods for measuring the average fiber diameter (that is, the average value of the actual diameter) in glass fiber products, namely the longitudinal method and the cross-sectional method. This standard applies to cut-to-length fiber yarns and continuous fiber yarns, as well as to the determination of fiber diameters in fabrics or mats. Note 1: The average diameter should not be confused with the nominal diameter. The nominal diameter is used to name the yarn and the material made of these yarns. It is consistent with the rounded value of the average diameter.

GB/T 7690.5-2001 history

2013 GB/T 7690.5-2013 Reinforcements.Test method for yarns.Part 5:Determination of fiber diameter for glass fiber
2001 GB/T 7690.5-2001 Reinforcement--Test method for yarns Part 5: Determination of fibre diameter for glass fibre