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GB/T 3292.2-2009: Textiles -- Unevenness of textile strands -- Part 2: Photoelectricity method
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GB/T 3292.2-2009: Textiles -- Unevenness of textile strands -- Part 2: Photoelectricity method

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Textiles.Unevenness of textile strands.Part 2. Photoelectricity method ICS 59.080.20 W04 National Standards of People's Republic of China Testing method for unevenness of textile yarn evenness Part 2. Optical methods Posted 2009-06-19 2010-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 3292 "Test Method for unevenness of textile yarn" includes the following two parts. --- Part 1. capacitance method; --- Part 2. Optical methods. This section GB/T 3292 Part 2. This part is proposed by the China Textile Industry Association. This part of the National Standardization Technical Committee on Basic Standards Subcommittee Textiles (SAC/TC209/SC1) centralized. This section is drafted. Shaanxi Changling Electric Co., Ltd. Textile, Textile Industry Research Institute of Standardization. The main drafters of this section. Sun Xinyu, Lv Zhihua. Testing method for unevenness of textile yarn evenness Part 2. Optical methods

1 Scope

GB/T 3292 This section specifies the method for determining the diameter of the yarn unevenness of the photoelectric type yarn evenness tester along the longitudinal direction. This section applies to a variety of fibers, yarns approximately circular cross-section. Note. Detection principle Photoelectric Method and capacitance method is different, as reflected in the photovoltaic method yarn evenness refers to the approximate diameter of the circular projection of the yarn unevenness, and capacitance method As reflected in the linear density unevenness correlated, but not identical.

2 Normative references

The following documents contain provisions which, through reference to GB/T 3292 to the present, constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB/T 6529 Textiles conditioning and testing using standard atmosphere (GB/T 6529-2008, ISO 139.2005, MOD)

3 Terms and Definitions

The following terms and definitions apply GB/T 3292 of this section. 3.1 Linear distance between two points in the longitudinal direction on the outer contour of the projection yarns formed perpendicular to the yarn. 3.2 Sliver thickness (cross-sectional area, diameter, linear density, etc.) along the longitudinal direction of the degree of unevenness. This section refers specifically to the degree of non-uniform diameter. 3.3 Within the overall length of the test, the yarn diameter than the standard percentage difference between the average diameter. 3.4 Each containing yarn 1000m diameter exceeds a certain magnitude, the length exceeds a certain limit details slubs, neps (neps, granulite) of Number. 3.5 Lb Test evenness basic measurement length of the sample unit, also known fragment length. ...