GB/T 3917.2-1997 Tear properties of textile fabrics Part 2: Determination of tear strength of tongue-shaped specimens
Some standard content:
1CS 59. 08U. 34
National Standard of the People's Republic of China
GB/T 3917.2—1997
Textiles
Tear properties of fabrics
Part 2: Determination of tear force of longue shaped test Specirns1997-06-09 Issued
State Administration of Technical Supervision
1997-12-01 Implementation
GB/T3917.2-1997
This standard is based on the draft international standards TS0/T1S13937-2:1995 Fabrics tearing properties Part 2: Determination of tear strength of trouser-shaped test specimens and TS1397-4:1999 Fabrics tearing properties Part 4: Determination of tear strength of trouser-shaped test specimens. It revises GB3917-8! Single tongue method for breaking strength test method. Compared with the reduced standard, this standard has major changes in technical content: 1. Method and test, the original standard is single tongue method, and the current standard is trouser-shaped test specimen, including single tongue test specimen and double tongue test specimen methods. Correspondingly, the specimen size has also been changed:
2. Instrument used: The original standard is constant rate type I (CRT or constant rate of elongation type (CRE) + The current standard is constant rate of elongation type (CRE): 3. Rate of change: The original standard is <2u0=10) m/min for pure materials and (502) mm/min for wool materials. The environmental standard stipulates (100±10) mm/min.
4. Calculation of results: The highest peak or the average of five peaks is used as the test result. The average of 12 peaks is used. The tearing properties of textile fabrics include three parts: Part 1 Determination of tearing strength by impact pendulum method! Part 2 Determination of tearing strength of tongue-shaped specimens Part 3 Determination of tearing force of trapezoidal specimens. This standard will replace GB8917-83 from the date of entry into force. Appendix A and Appendix 10 of this standard are the references to the standard. Appendix C and Appendix D of this standard are the supplementary appendices. This standard is proposed by the Science and Technology Development Department of the China Textile and Apparel Federation. This standard is implemented by the Standardization Research Institute of the China Textile and Apparel Federation. The original unit of this standard is the Shanghai Textile and Apparel Science Research Institute. The main drafters of this standard are Li Zhilan and Ding Yuhuai. National Standard of the People's Republic of China
Tear properties of fabrics
Textiles
Part 2: Determination of tear farce of tongue shaped test specimens Textiles--Tear prnpertles nf fahrics Purt 2, Determetion of tear farce of tongue shaped test speclmens1 Scope
GB/T 3917.2-1997
2917--33
This standard specifies the method for determining the tear farce of fabrics by tongue shaped test method, including single and double tongue test specimens. This standard is applicable to woven fabrics and fabrics produced by other technologies. This standard is not applicable to the determination of tear properties of knitted fabrics, woven elastic fabrics, etc. This standard specifies the continuous elongation tester (CRE). 2 Reference standards
The clauses contained in the following standards shall be used in conjunction with the clauses of the standards before they are referenced in this standard. When this standard is published, the versions shown are valid. All standards are subject to change, and parties using technical standards should discuss the applicability of the latest version of the following standards. GB5529-86 Standard atmosphere for the adjustment and testing of protective products 3 Definitions
The following definitions are not used in this standard,
3.1 Continuous elongation tester cunsrantrLteofexiensiunt(CRE)restingmachine is a tensile testing machine in which one clamp is fixed and the other clamp moves at a constant speed during the entire test process, 3.2 Gauge length
The distance between the two effective clamps on the test device. 3.3 Tear strength The force required for the initial extension of a cut on a test specimen under specified conditions: 3.4 Peak tear strength The corresponding force value at the point where the slope changes to negative on the strength curve. 3.5 Tear length The distance the cut extends from the start of force application to the end of force application. 3.6 Single-tongue ttrouse shaped test A cut of a specified length is made in the middle of the short side of the shaped test specimen, and the two shaped teeth can be clamped to form a trouser leg-shaped test push (Figure 1). Approved by the State Administration of Technical Supervision on May 9, 1997 and implemented on December 1, 1997, is the end point mark of the original length, GR/T3917.2-1997 10th edition! Figure! 3. Tongue shaped test specimen: Cut two incisions with specified spacing and length in the strip test specimen to form a tongue shaped specimen for clamping (see Figure 2). Note: 26 is the mark of the breaking point and the path. Put the tongue shaped specimen into the tensile tester, make the specimen mouth line between the upper and lower chopsticks (see Figure A, 4), the machine applies tension in the incision direction, records the tearing strength until it is torn to the specified length, and calculates the tearing strength through the electronic device according to the peak value on the curve output by the automatic increase instrument.
5 Sampling
CB/T 3917.2—1997
33 Single tongue specimen clamping method
Sampling shall be carried out according to the provisions of the product standard or according to the agreement with the test surface. In the absence of the above requirements, Appendix A gives a sampling example, and Appendix B is a sample cut from the sample. The test area should be avoided, the edge of the cloth and the unrepresentative area on the fabric. 6 Instruments
61 Constant speed stop length test equipment (CRE)
The length tester shall meet the following technical requirements: The pulling speed can be adjusted within the range of 100mn/min ± 10mm/min. The maximum error of the displayed or recorded breaking force at any point within the range of the instrument shall not exceed ± 1%, and the displayed or recorded torque difference between the clamps shall not exceed ± 1.
Note: If the instrument used does not meet this requirement, please state it in the test report. If the force and elongation records are obtained through digital image acquisition chips and software, the data acquisition frequency should be at least 8 times, and the span length can be set to 100mm. 6.2 The fire holding device should only keep the center points of the two fasteners in the straight line of pulling. The fasteners should be perpendicular to the straight line of pulling, and the holding time should be within the plane. The fasteners should be designed to ensure that they can hold the test mix without stopping its movement, and will not cause acid or damage the test mix. The effective width of the fasteners depends on the type of test row. For tongue samples, it should be at least 50mm. For tongue samples, it should be at least 200mm. 6.3 The sample cutting device is preferably a sampler or a sample plate. The sample shown in Figure 1 or Figure 2 can be obtained. The temperature and humidity of the test gas should be adjusted. The test air should be connected to the source of the test gas. 8 Preparation of test specimens
8.1 General test
GE/T3917.2-1997
Two groups of test specimens are selected for each decision, one group is the proposed direction, the other is the horizontal direction. Each group of test specimens shall have at least one sample or more. According to the provisions of Section 5 and Appendix B, each sample shall not contain a line in the length direction or the horizontal direction, and shall not be within 150mm from the cloth. B.2 Dimensions
8.2.1 Single tongue test specimen (see Figure 1) is a strip with a length of 220mm±2mm and a width of nm±1m. Each test specimen shall be cut from the middle in the width direction and a slit with a length of 100mm1m shall be made in the length direction. The end point of the gradual adjustment shall be marked 25mm=1mm from the middle of the strip.
If the relevant method is not effective, the test specimen with a width other than 5mm can be used. The appendix stipulates the convenient width. 8.2.2 Double tongue test specimen (Figure 2 is a rectangular strip, 220 mm long, 150 mm wide, 2 mm wide, each test specimen is cut into a square shape along the length: 10 cm + 2 mm > × t50a + 1 mm), draw a straight line abcd on both sides of the test specimen at E0 mm ± 1 mm from the tongue end, and mark the tear point at 25 mm ± 1 mm from the cut end of the strip. B.3 Cutting of test strips
woven fabrics.Each test piece is cut parallel to the radial or weft direction of the fabric. The long side of the test piece that is parallel to the warp direction is called weft tear. The long side of the test piece that is parallel to the warp direction is called warp tear (see Appendix). 9.1 Set the required length of the test piece to 1 cm. 9.2 Set the pulling rate Set the pulling rate of the tensile tester to 100 m/min. 9.3 Safety of the test piece 9.3.1 For a single-tongue test piece, lift the test piece into the tongs as shown in Figure 3. Align the cutting line of each tongs with the center line of the tongs. The test piece should not be cut and should be in a state of being ... Relaxation is unavoidable when the test strips are pulled. 9.3.2 Double-tongue sampling, as shown in Figure 4, clamp the tongue of the sample in the center of the chopsticks symmetrically so that the straight line and the straight line are clearly visible. Insert the two long strips of the test strip symmetrically into the moving clamp of the test instrument so that the straight line and the straight line are clearly visible, and make the two long strips of the sample run in the tearing direction. Pay attention to ensure that each strip is fixed in the center of the test strip so that it is parallel to the direction of the force to be tested, and pre-tension is applied to avoid relaxation.
9.4 Testing
GE/T3917.2—1997
Figure 4 Double-tongue sample clamping method
And use the instrument to continuously pull to the integral mark of the test strip, and use a recorder or electronic recording device to record the tensile strength (N) and tear length of each sample in each direction, and observe whether the test strips are pulled. Whether it is in the direction of the applied force and whether there is a phenomenon that the yarn is displaced from the fabric instead of being adjusted. If the specimen has a tendency to slip during the test, the tearing is in the direction of the applied force, and the test result can be confirmed. Otherwise, the result should be eliminated.
If the test results of three or more specimens in a sample are different, it can be considered that this method is not applicable to the product. If it is agreed to increase the number of specimens, it is best to double the number of specimens. 10 Calculation and display of results
101 Manual calculation of the force-length curve recorded on the recording paper. Appendix C gives the calculation method.
10.1.1 Divide the operating value curve into four equal areas from the first peak to the end of the last peak. The first peak is excluded and the remaining areas are not used. In each region, select and mark the two highest peaks and two lowest peaks. When the above rules are followed, the peaks are selected and the frequency measurement is performed so that the peaks are at least 10% higher than the peaks of the rising section, otherwise it will fail. For high-frequency objects, slow down the recorder to the speed required, and take the value of the peak as the standard. 10.1.2 Calculate the arithmetic mean of the 12 peaks for each specimen in N. If necessary, the maximum and minimum peaks in these three regions can be recorded. In order to save time, it is recommended to use electronic methods to calculate all the peaks. 10.1.3 Calculate the total arithmetic half-mean of the frequency measurement strength of the samples in the same direction, expressed as N, and keep two significant figures. GR/T 3917.2-1997
10.1.4 If necessary, calculate the error coefficient to 0.1% and the average value obtained by rounding off the average value of the sample in 10.1.2 to 95% of the average value.
10.2 Electronic oxygen meter
The appendix gives a calculation example.
10.21 Divide the area between the first peak and the last peak into four equal regions, excluding the peak value of the first region, and record all the peak values in the next three regions: the confirmation of the peak value shall be in accordance with the provisions of 10.1.1. 10.2.2 Calculate the arithmetic mean of the tearing force of the sample using all the peak values recorded in 10.2.1. 10.2.3 Calculate the total arithmetic mean of the tearing force of all the samples with the same tearing force using the average value of each test value, and express it as V, and retain two significant figures.
10.2.4 If required, calculate the coefficient of variation accurate to 0.1% and the 95% confidence interval of the average value of the four or five samples calculated according to 10.2.2.
11 Test report
The test report shall include the following:
11.1 General information
a) Test date
b) Sample specifications and the sampling procedure if necessary;
c) Number of samples (excluding test results and reasons for rejection):
e) Average value of manual or electronic sieve gage;
f) Any deviation from this standard.
11.2 Test results
T1.2.1 The annual average values of the warp and weft tear strengths, in units. If only one or four test pieces are tested, the results of each or more tests shall be indicated separately. 11.2.2 If agreed upon, give the maximum value of each sample and the average value, in N. 11.2.3 If necessary, give the coefficient of variation (%). 11.2.4 If necessary, give the 95% confidence interval, in N. 11.2.5 If necessary, list the minimum and maximum values of each sample, in GB/T 3917.2—1997 Appendix A (Standard Appendix) Recommended sampling sequence 1 batch sample (collected from a shipment or batch of goods) Take an appropriate number of samples randomly from a shipment or batch of goods as shown in A1. It should be ensured that there is no damage or breakage in the transportation process in the samples. Table A1 Batch samples Total factor of goods shipped together or in a batch 3 4-10 1t-33 A2 Number of experimental samples Number of single pieces of batch samples From each piece of batch samples, cut a full-width fabric with a length of at least 1m at least 9n away from the piece as the experimental sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:2 Double tongue sample, as shown in Figure 4, clamp the tongue of the sample in the center of the chopsticks symmetrically, so that the straight line and the straight line are clearly visible. Put the two long strips of the test piece symmetrically into the moving clamp of the tester, so that the straight line and the straight line are clearly visible, and make the two long strips of the sample run in the tearing direction. Pay attention to ensure that each strip is fixed in the center of the needle so that it is parallel to the force direction of the test force when it is tearing, and avoid pre-tension and relaxation.
9.4
GE/T3917.2—1997
Figure 4 Double-specimen clamping method
And the instrument is continuously pulled to the test mark of the whole point, and the tear strength (N) and tear length of each sample in each fabric direction are recorded by a recorder or electronic recording device. Observe whether the tearing is in the direction of the applied force and whether there is a phenomenon that the yarn is moved from the fabric instead of being fixed. If the sample has the tendency to slip during the test and the tearing is in the direction of the applied force, then this test result can be confirmed, otherwise the result should be eliminated.
If the test results of three or more samples in a sample are different, it can be considered that this method is not applicable to the product. If it is agreed to increase the number of samples, it is best to double the number of samples. 10 Calculation and presentation of results
101 Manual calculation of the force-to-load curve on the recording paper Appendix C gives the calculation method.
10.1.1 Divide the operating value curve into four equal areas from the first peak to the end of the peak. The first peak is not included in the first area. In the remaining areas, select and mark the two highest peaks and two small lower peaks in each area. When
1 is carried out according to the above regulations, the peak is selected and the flow rate is measured. The single pair of peaks and the flow rate drop should be at least 10% higher than the rising section. Otherwise, it will fail.
2 For high-frequency objects, slow down the recorder speed accordingly. The value of the graph shall prevail. 10.1.2 Calculate the arithmetic mean signal of the 12 peaks of each specimen in N. If necessary, the maximum and minimum peak values within these three ranges may be recorded. In order to save time, it is recommended to use electronic methods to calculate all peak values. 10.1.3 Calculate the total mean of the frequency-destructive strength of the samples in the same direction, expressed as N, and keep two significant figures. GR/T 3917.2-1997
10.1.4 If necessary, calculate the average value of the average value of the sample in 10.1.2 to 95% of the average value after rounding off.
10.2 Electronic oxygen meter
Appendix gives an example of calculation.
10.21 Divide the area between the first peak and the last peak into four equal areas, excluding the peak in the first area, and record all peaks in the next three areas: the confirmation of the peak value shall be in accordance with the provisions of 1.1.1. 10.2.2 Calculate the arithmetic mean of the tearing force of the specimens using all the peak values recorded in 10.2.1. 10.2.3 Calculate the total arithmetic mean of the tearing force of all specimens of the same type using the mean value of each test property and express it as V with two significant figures retained.
10.2.4 If required, calculate the coefficient of variation accurate to 0.1% and the 95% confidence interval of the average value of the four or five samples calculated according to 10.2.2.
11 Test report
The test report shall include the following:
11.1 General information
a) Test date
b) Sample specifications and the sampling procedure if necessary;
c) Number of samples (excluding test results and reasons for rejection):
e) Average value of manual or electronic sieve gage;
f) Any deviation from this standard.
11.2 Test results
T1.2.1 The annual average values of the warp and weft tear strengths, in units. If only one or four test pieces are tested, the results of each or more tests shall be indicated separately. 11.2.2 If agreed upon, give the maximum value of each sample and the average value, in N. 11.2.3 If necessary, give the coefficient of variation (%). 11.2.4 If necessary, give the 95% confidence interval, in N. 11.2.5 If necessary, list the minimum and maximum values of each sample, in GB/T 3917.2—1997 Appendix A (Standard Appendix) Recommended sampling sequence 1 batch sample (collected from a shipment or batch of goods) Take an appropriate number of samples randomly from a shipment or batch of goods as shown in A1. It should be ensured that there is no damage or breakage in the transportation process in the samples. Table A1 Batch samples Total factor of goods shipped together or in a batch 3 4-10 1t-33 A2 Number of experimental samples Number of single pieces of batch samples From each piece of batch samples, cut a full-width fabric with a length of at least 1m at least 9n away from the piece as the experimental sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:2 Double tongue sample, as shown in Figure 4, clamp the tongue of the sample in the center of the chopsticks symmetrically, so that the straight line and the straight line are clearly visible. Put the two long strips of the test piece symmetrically into the moving clamp of the tester, so that the straight line and the straight line are clearly visible, and make the two long strips of the sample run in the tearing direction. Pay attention to ensure that each strip is fixed in the center of the needle so that it is parallel to the force direction of the test force when it is tearing, and avoid pre-tension and relaxation.
9.4
GE/T3917.2—1997
Figure 4 Double-specimen clamping method
And the instrument is continuously pulled to the test mark of the whole point, and the tear strength (N) and tear length of each sample in each fabric direction are recorded by a recorder or electronic recording device. Observe whether the tearing is in the direction of the applied force and whether there is a phenomenon that the yarn is moved from the fabric instead of being fixed. If the sample has the tendency to slip during the test and the tearing is in the direction of the applied force, then this test result can be confirmed, otherwise the result should be eliminated.
If the test results of three or more samples in a sample are different, it can be considered that this method is not applicable to the product. If it is agreed to increase the number of samples, it is best to double the number of samples. 10 Calculation and presentation of results
101 Manual calculation of the force-to-load curve on the recording paper Appendix C gives the calculation method.
10.1.1 Divide the operating value curve into four equal areas from the first peak to the end of the peak. The first peak is not included in the first area. In the remaining areas, select and mark the two highest peaks and two small lower peaks in each area. When
1 is carried out according to the above regulations, the peak is selected and the flow rate is measured. The single pair of peaks and the flow rate drop should be at least 10% higher than the rising section. Otherwise, it will fail.
2 For high-frequency objects, slow down the recorder speed accordingly. The value of the graph shall prevail. 10.1.2 Calculate the arithmetic mean signal of the 12 peaks of each specimen in N. If necessary, the maximum and minimum peak values within these three ranges may be recorded. In order to save time, it is recommended to use electronic methods to calculate all peak values. 10.1.3 Calculate the total mean of the frequency-destructive strength of the samples in the same direction, expressed as N, and keep two significant figures. GR/T 3917.2-1997
10.1.4 If necessary, calculate the average value of the average value of the sample in 10.1.2 to 95% of the average value after rounding off.
10.2 Electronic oxygen meter
Appendix gives an example of calculation.
10.21 Divide the area between the first peak and the last peak into four equal areas, excluding the peak in the first area, and record all peaks in the next three areas: the confirmation of the peak value shall be in accordance with the provisions of 1.1.1. 10.2.2 Calculate the arithmetic mean of the tearing force of the specimens using all the peak values recorded in 10.2.1. 10.2.3 Calculate the total arithmetic mean of the tearing force of all specimens of the same type using the mean value of each test property and express it as V with two significant figures retained.
10.2.4 If required, calculate the coefficient of variation accurate to 0.1% and the 95% confidence interval of the average value of the four or five samples calculated according to 10.2.2.
11 Test report
The test report shall include the following:
11.1 General information
a) Test date
b) Sample specifications and the sampling procedure if necessary;
c) Number of samples (excluding test results and reasons for rejection):
e) Average value of manual or electronic sieve gage;
f) Any deviation from this standard.
11.2 Test results
T1.2.1 The annual average values of the warp and weft tear strengths, in units. If only one or four test pieces are tested, the results of each or more tests shall be indicated separately. 11.2.2 If agreed upon, give the maximum value of each sample and the average value, in N. 11.2.3 If necessary, give the coefficient of variation (%). 11.2.4 If necessary, give the 95% confidence interval, in N. 11.2.5 If necessary, list the minimum and maximum values of each sample, in GB/T 3917.2—1997 Appendix A (Standard Appendix) Recommended sampling sequence 1 batch sample (collected from a shipment or batch of goods) Take an appropriate number of samples randomly from a shipment or batch of goods as shown in A1. It should be ensured that there is no damage or breakage in the transportation process in the samples. Table A1 Batch samples Total factor of goods shipped together or in a batch 3 4-10 1t-33 A2 Number of experimental samples Number of single pieces of batch samples From each piece of batch samples, cut a full-width fabric with a length of at least 1m at least 9n away from the piece as the experimental sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:1. Divide the operating curve into four equal areas from the first peak to the end of the last peak. The first peak is not included. In the remaining areas, select and mark the two highest peaks and two lowest peaks in each area. When the peak is selected according to the above rules, the peak drop of the flow rate test should be at least 10% higher than the rising section, otherwise it will fail.
2 For high-frequency objects, slow down the recorder to the corresponding speed, and take the value of the graph as the standard. 10.1.2 Calculate the arithmetic mean of the 12 peaks of each sample, in N. If necessary, the maximum and minimum peaks in these three regions can be recorded. In order to save time, only a limited number of peaks need to be recorded manually. It is recommended to use electronic methods to calculate all slow peaks. 10.1.3 Calculate the total arithmetic half-mean of the frequency-destructive strength of the samples in the same direction, expressed as N, and keep two significant figures. GR/T 3917.2-1997
10.1.4 If necessary, calculate the error coefficient to 0.1% and the average value obtained by rounding off the average value of the sample in 10.1.2 to 95% of the average value.
10.2 Electronic oxygen meter
The appendix gives a calculation example.
10.21 Divide the area between the first peak and the last peak into four equal regions, excluding the peak value of the first region, and record all the peak values in the next three regions: the confirmation of the peak value shall be in accordance with the provisions of 10.1.1. 10.2.2 Calculate the arithmetic mean of the tearing force of the sample using all the peak values recorded in 10.2.1. 10.2.3 Calculate the total arithmetic mean of the tearing force of all the samples with the same tearing force using the average value of each test value, and express it as V, and retain two significant figures.
10.2.4 If required, calculate the coefficient of variation accurate to 0.1% and the 95% confidence interval of the average value of the four or five samples calculated according to 10.2.2.
11 Test report
The test report shall include the following:
11.1 General information
a) Test date
b) Sample specifications and the sampling procedure if necessary;
c) Number of samples (excluding test results and reasons for rejection):
e) Average value of manual or electronic sieve gage;
f) Any deviation from this standard.
11.2 Test results
T1.2.1 The annual average values of the warp and weft tear strengths, in units. If only one or four test pieces are tested, the results of each or more tests shall be indicated separately. 11.2.2 If agreed upon, give the maximum value of each sample and the average value, in N. 11.2.3 If necessary, give the coefficient of variation (%). 11.2.4 If necessary, give the 95% confidence interval, in N. 11.2.5 If necessary, list the minimum and maximum values of each sample, in GB/T 3917.2—1997 Appendix A (Standard Appendix) Recommended sampling sequence 1 batch sample (collected from a shipment or batch of goods) Take an appropriate number of samples randomly from a shipment or batch of goods as shown in A1. It should be ensured that there is no damage or breakage in the transportation process in the samples. Table A1 Batch samples Total factor of goods shipped together or in a batch 3 4-10 1t-33 A2 Number of experimental samples Number of single pieces of batch samples From each piece of batch samples, cut a full-width fabric with a length of at least 1m at least 9n away from the piece as the experimental sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples Www.bzxZ.net
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:1. Divide the operating curve into four equal areas from the first peak to the end of the last peak. The first peak is not included. In the remaining areas, select and mark the two highest peaks and two lowest peaks in each area. When the peak is selected according to the above rules, the peak drop of the flow rate test should be at least 10% higher than the rising section, otherwise it will fail.
2 For high-frequency objects, slow down the recorder to the corresponding speed, and take the value of the graph as the standard. 10.1.2 Calculate the arithmetic mean of the 12 peaks of each sample, in N. If necessary, the maximum and minimum peaks in these three regions can be recorded. In order to save time, only a limited number of peaks need to be recorded manually. It is recommended to use electronic methods to calculate all slow peaks. 10.1.3 Calculate the total arithmetic half-mean of the frequency-destructive strength of the samples in the same direction, expressed as N, and keep two significant figures. GR/T 3917.2-1997
10.1.4 If necessary, calculate the error coefficient to 0.1% and the average value obtained by rounding off the average value of the sample in 10.1.2 to 95% of the average value.
10.2 Electronic oxygen meter
The appendix gives a calculation example.
10.21 Divide the area between the first peak and the last peak into four equal regions, excluding the peak value of the first region, and record all the peak values in the next three regions: the confirmation of the peak value shall be in accordance with the provisions of 10.1.1. 10.2.2 Calculate the arithmetic mean of the tearing force of the sample using all the peak values recorded in 10.2.1. 10.2.3 Calculate the total arithmetic mean of the tearing force of all the samples with the same tearing force using the average value of each test value, and express it as V, and retain two significant figures.
10.2.4 If required, calculate the coefficient of variation accurate to 0.1% and the 95% confidence interval of the average value of the four or five samples calculated according to 10.2.2.
11 Test report
The test report shall include the following:
11.1 General information
a) Test date
b) Sample specifications and the sampling procedure if necessary;
c) Number of samples (excluding test results and reasons for rejection):
e) Average value of manual or electronic sieve gage;
f) Any deviation from this standard.
11.2 Test results
T1.2.1 The annual average values of the warp and weft tear strengths, in units. If only one or four test pieces are tested, the results of each or more tests shall be indicated separately. 11.2.2 If agreed upon, give the maximum value of each sample and the average value, in N. 11.2.3 If necessary, give the coefficient of variation (%). 11.2.4 If necessary, give the 95% confidence interval, in N. 11.2.5 If necessary, list the minimum and maximum values of each sample, in GB/T 3917.2—1997 Appendix A (Standard Appendix) Recommended sampling sequence 1 batch sample (collected from a shipment or batch of goods) Take an appropriate number of samples randomly from a shipment or batch of goods as shown in A1. It should be ensured that there is no damage or breakage in the transportation process in the samples. Table A1 Batch samples Total factor of goods shipped together or in a batch 3 4-10 1t-33 A2 Number of experimental samples Number of single pieces of batch samples From each piece of batch samples, cut a full-width fabric with a length of at least 1m at least 9n away from the piece as the experimental sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:2—1997
Appendix A
(Standard Appendix)
Recommended sampling sequence
Net 1 batch sample (collected from a batch of goods) As shown in A1, randomly select an appropriate number of samples from a shipment or a batch of goods. It should be ensured that there is no damage or damage during transportation in the sample. Table A1 Batch sample
Total number of batches or goods 3
4-10
1t--33
A2 Number of test samples
Single piece number of batch samples
From each piece of the batch sample, cut a full-width fabric of at least 1m in length at least 9 meters away from the piece as a test sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:2—1997
Appendix A
(Standard Appendix)
Recommended sampling sequence
Net 1 batch sample (collected from a batch of goods) As shown in A1, randomly select an appropriate number of samples from a shipment or a batch of goods. It should be ensured that there is no damage or damage during transportation in the sample. Table A1 Batch sample
Total number of batches or goods 3
4-10
1t--33
A2 Number of test samples
Single piece number of batch samples
From each piece of the batch sample, cut a full-width fabric of at least 1m in length at least 9 meters away from the piece as a test sample. It should be ensured that the sample has no wrinkles or visible wear points.) "" Si Gu Wu,
2 "Light groove \ Random selection
GB/T 3917.2-1997
(standard sweet record)
Example of cutting specimens from experimental samples
Example of cutting specimens from the upper part of the experimental sample
Too technical calculation,
The highest peak value in one area is:
The lowest peak value in ten areas is less,
Electronic juice calculation:
GB/T 3917.2-1997
Appendix C
(Reminder)
Example of calculation of gradual breaking strength
Region C1 Breaking strength test
Use all two peaks required by (3.4) in the first to third zones. Appendix D
[Reminder Appendix
Wide-type sample
Region?
Relevant points
Requirements of Article 1. When the yarn is newly broken, it is torn by slipping in the fabric. The tearing is incomplete or insufficient along the direction of the force applied. The sample should be easy to remove
If more than three of the five-point samples are removed, it can be considered that this method is not suitable for the sample. For some special test products: such as loose fabrics, cracks Seams and fabrics for technical use (such as airbags) of human cable. This standard recommends the use of wide specimens with the test width relaxed (see [1]. Each strip to be clamped is cut parallel to the outside and folded so that the clamping width of each strip is half the width of the cut (see Figure). All other tests shall be carried out in accordance with the provisions of this standard, but the test width shall be at least half of the test width: all values shall be estimated according to 10.2. Specially designed tear-resistant fabrics may form a "unpredictable" load track. This is a characteristic of some fabrics. It is recommended to follow the contract provisions and include a value of the tear track 9
correction: other widths shall be implemented according to the internal settings.
Note that · is the end length of the end mark.
GB/T 3917.2—1997
200±2
#a0±1
Test ruler small circle
Figure 12 Sample holding diagram
Unit:
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