GB/T 3917.2-2009 English PDF (GBT3917.2-2009)

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GB/T 3917.2-2009: Textile -- Tear properties of fabrics -- Part 2: Determination of tear force of trouser-shaped test specimens (Single tear method)
GB/T 3917.2-2009
Textile - Tear properties of fabrics - Part 2. Determination of tear force of trouser-shaped test specimens (Single tear method)
ICS 59.080.30
W04
National Standards of People's Republic of China
GB/T 3917.2-2009/ISO 13937-2.2000
Replace GB/T 3917.2-1997
Textile fabric tearing performance
Part 2. Pants sample (single seam)
Determination of tear strength
(ISO 13937-2.2000, IDT)
Released on.2009-03-19
2010-01-01 implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
China National Standardization Administration issued
Foreword
GB/T 3917 "Tattoo Performance of Textile Fabrics" includes the following five parts.
--- Part 1. Determination of the tearing strength of the impact pendulum method;
---Part 2. Determination of the tear strength of the pants sample (single seam);
---Part 3. Determination of tear strength of trapezoidal specimens;
--- Part 4. Determination of tear strength of tongue specimens (double seams);
--- Part 5. Determination of tear strength of wing specimens (single seams).
This part is the second part of GB/T 3917.
This section uses the translation method equivalent to ISO 13937-2.2000 "Textile fabric tearing performance Part 2. Pants sample (single
Sewing) Determination of tear strength (English version).
This section is equivalent to ISO 13937-2.2004, which has the following differences compared to ISO 13937-2.2004.
--- Removed the preface to international standards;
--- Removed the note in Chapter 1;
--- The normative reference documents replaced the corresponding international standards by Chinese standards;
--- Added Figure B. 1 and Figure C. 1 picture title.
This part replaces GB/T 3917.2-1997 "Tearing properties of textile fabrics - Part 2. Determination of tear strength of tongue-shaped specimens"
Single tongue method. The main differences between this part and GB/T 3917.2-1997 single tongue method are.
--- Increased the scope of inapplicability;
--- Normative references increase the standard for instrument debugging;
--- Added a note of 3.2 to supplement the test of the effective clamping line;
--- Added a note of 3.3;
--- Added a note of 3.4 to illustrate the method of selecting the effective peak;
--- Added the specific standard for instrument commissioning in 6.1 General;
---The width of the clamp is modified from at least 50mm to 75mm;
---Added a wide sample with a width of.200mm and its operation method;
--- Increased the ratio of the paper feed rate of the recording paper in 9.4 to the elongation rate of the instrument is 2.1;
--- Edited changes to 10.1.1, and deleted note 2;
--- Increased the calculation of the maximum peak average of 6 samples per sample;
--- Appendix C adds an approximate calculation method for peak selection.
Appendix D of this section is a normative appendix. Appendix A, Appendix B, and Appendix C are informative annexes.
This part was proposed by the China Textile Industry Association.
This part is under the jurisdiction of the Basic Standards Branch of the National Textile Standardization Technical Committee (SAC/TC209/SC1).
This section is mainly drafted by. Suzhou Fiber Inspection Institute, China Textile Standard (Beijing) Inspection and Certification Center Co., Ltd.
The main drafters of this section. Hang Zhiwei, Wang Ning, Wang Huan, Wang Haijuan, and Jing Jing.
The previous versions of the standards replaced by this section are.
---GB/T 3917-1983, GB/T 3917.2-1997.
GB/T 3917.2-2009/ISO 13937-2.2000
Textile fabric tearing performance
Part 2. Determination of tear strength of pants-shaped specimens (single seams)
1 range
This part of GB/T 3917 specifies a method for determining the tear strength of a fabric using a single slit pant sample method. In the direction of tearing strength
The force required to tear the fabric from the initial single slit slit to the specified length is measured.
This section is mainly applicable to woven fabrics, and can also be applied to fabrics made by other technical methods, such as non-woven fabrics.
This section does not apply to knitted fabrics, woven elastic fabrics, and sparse fabrics that have the potential to cause tear transfer and have higher anisotropy.
Fabric.
This section specifies the use of a constant velocity elongation (CRE) tester.
2 Normative references
The terms in the following documents become the provisions of this part by reference to this part of GB/T 3917. Quotations with dated
And all subsequent amendments (not including errata content) or revisions do not apply to this section, however, it is encouraged to
The parties to the discussion use the latest version of these documents. For undated references, the latest edition applies to this section.
GB/T 6529 Standard atmosphere for textile conditioning and testing (GB/T 6529-2008, ISO 139.2005, MOD)
GB/T 16825.1 Inspection of static single-axis testing machines - Part 1 . Examination and calibration of force measuring systems for tension and/or pressure testing machines
Standard (GB/T 16825.1-2008, ISO 7500-1..2004, IDT)
GB/T 19022 Measurement management system measurement process and measurement equipment requirements (GB/T 19022-2003, ISO 10012.
2003, IDT)
3 Terms and definitions
The following terms and definitions apply to this part of GB/T 3917.
3.1
Throughout the test, one clamp was fixed and the other clamp was used as a tensile tester for constant speed motion.
3.2
The distance between the two effective clamping lines on the test device.
Note. The effective clamping line of the chuck can be measured by simultaneously clamping the sample specimen and the carbon paper to which the pre-tension is applied.
3.3
The force required to expand the initial incision on the specimen under specified conditions.
Note. The warp yarn is torn off, which is called “warp tear strength”, and the weft yarn is torn off, which is called “weft tear strength”.
3.4
On the force-elongation curve, the slope corresponds to the corresponding strong value at the negative point.
Note. The value of the rise and fall forces at both ends of the peak used for the calculation is at least 10% of the previous peak drop value or the next peak rise value.
3.5
The distance from which the incision extends from the beginning of the application to the termination.
GB/T 3917.2-2009/ISO 13937-2.2000
3.6
The cut length is cut from the center of the short side of the rectangular sample to form a two-legged fabric tear test specimen for clamping. (See Figure 1
And Figure 2)
4 Principle
The legs of the trousers are gripped so that the sample slit line is in line between the upper and lower clamps. Actuate the instrument to apply tension to the direction of the incision.
Record the tear strength up to the specified length and measure the peak on the curve according to the automatic drawing device or by electronic device
Calculate the tear strength.
5 sampling
Sampling according to product standards or according to relevant agreements.
In the absence of the above requirements, Appendix A gives an example of a suitable sampling.
Appendix B is an example of cutting a sample from a sample. Be careful to avoid wrinkles, hem, and areas of fabric that are not representative.
6 instruments
6.1 Measurement of the tester
Should be carried out according to GB/T 19022.
6.2 Constant Velocity Elongation (CRE) Tester
The constant velocity elongation tester shall meet the following technical requirements.
a) The stretching speed can be controlled within the range ...