GB/T 31334.2-2015Test methods for dipped canvas—Part 2: Yarn crimp on warp and density (English PDF)
浸胶帆布试验方法 第2部分：经向卷曲度和密度
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
February 4, 2015
Implementation date
June 1, 2015
Scope
GB/T 31334.2-2015 is the English-translated version of 浸胶帆布试验方法 第2部分：经向卷曲度和密度.
GB/T 31334.2-2015 is the Chinese standard "Test methods for dipped canvas—Part 2: Yarn crimp on warp and density".
Its scope clause reads: This section provides the use of the instrument or curl pull tester dipped canvas by (Method A test method to curl yarn and square Method B) and Test Method dipped canvas the warp and weft density was measured using a fabric density mirror.
This section applies to polyester fiber, nylon fiber material produced by the dipped canvas in the warp and weft yarn to curl density Determination.
Note. choose Method A or Method B in any of the tests, but using warp curl value obtained by these two methods may be different tests, with Which test method body may choose to seek the views of the company dipped canvas or negotiation. Its clauses include terms and definitions; test principle.
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Document preview — GB/T 31334.2-2015
National Standard of the People's Republic of China
- ICS
- 83.140.99
- Classification
- G 47
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and Definitions
- 4 Test principle
1 Scope
This section provides the use of the instrument or curl pull tester dipped canvas by (Method A test method to curl yarn and square
Method B) and Test Method dipped canvas the warp and weft density was measured using a fabric density mirror.
This section applies to polyester fiber, nylon fiber material produced by the dipped canvas in the warp and weft yarn to curl density
Determination.
Note. choose Method A or Method B in any of the tests, but using warp curl value obtained by these two methods may be different tests, with
Which test method body may choose to seek the views of the company dipped canvas or negotiation.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 6529 Textiles Standard conditioning and testing atmosphere
GB/T 8170 repair value expressed about the rules and limit values and judgment
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 Straight tension stretchedforce
Elimination of the yarn crimp minimum force applied to the yarn.
3.2 Stretched length
Crimped yarn tension in straight lengths up straight state.
3.3 Warp curl yarncrimponwarp
Dipped canvas in crimped warp yarns reaches stretched length elongation.
4 Test principle
4.1 warp curl
Remove from the known length of yarn dipped canvas spline, under the action of a certain tension to make it straight, yarn length measurement in that state
As the length of the straight to the stretched length of yarn and the yarn dipped canvas in the difference between the lengths of the latter percentage is curl yarn.
The size of the tension is applied shall be determined in accordance with varieties warp and nominal linear density dipped canvas.
4.2 Density
Use of mobile dipped canvas fabric density mirror measuring the number of warp yarns or weft within a certain length, converted into a 10cm length […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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Related Standards
GB/T 31334.1-2015 — Test methods for dipped canvas—Part 1: Adhesion strength
GB/T 31334.3-2015 — Test methods for dipped canvas—Part 3: Stiffness
GB/T 31334.4-2016 — Test methods for dipped canvas—Part 4:Hot air thermal shrinkage
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GB/T 31334.2-2015
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