This standard specifies two methods for determining the width of woven fabrics. This standard applies to full-width or folded woven fabrics (including elastic fabrics) with a width of at least 10 cm. GB/T 4667-1995 Determination of the width of woven fabrics GB/T4667-1995 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Determination of width of woven fabrics
Textiles--Woven fabrics-Measurement of width of pieces
This standard is equivalent to the international standard ISO3932-1976 "Textiles 1 Subject content and scope of application
This standard specifies two methods for determining the width of woven fabrics Woven fabrics-
GB/T4667-1995
Replaces GB4667--84
-Measurement of width".
This standard is applicable to full-width or folded woven fabrics (including elastic fabrics) with a width of at least 10 cm. 2 Reference standards
Standard atmosphere for conditioning and testing textiles GB6529
GB8170
Numerical rounding rules
3 Definition
The width of a fabric refers to the distance between the two outermost warp yarns of the fabric perpendicular to the length direction of the fabric. 4 Principle
4.1 Method 1
If the entire fabric can be conditioned in a standard atmosphere, the width can be measured at different points of the fabric with a steel ruler after conditioning. 4.2 Method 2
If the entire fabric cannot be conditioned in a standard atmosphere, the fabric can be relaxed and then its width can be measured in an ordinary atmosphere with relatively stable temperature and humidity (as in Method 1), and then the width can be corrected with a coefficient. The correction coefficient is calculated by measuring the width after conditioning a part of the relaxed fabric in a standard atmosphere. When conditioning, this part can be cut or not cut from the entire fabric.
5 Tools
Steel ruler. The graduation value is in millimeters, and the length is greater than the width of the fabric. 5.1
Measurement table.
Atmosphere for humidity adjustment and testing
The atmosphere for humidity adjustment and testing adopts the standard atmosphere specified in GB6529, and the secondary standard atmosphere should be used for arbitration tests. 7 Steps
7.1. Measurement accuracy
Approved by the State Administration of Technical Supervision on December 8, 1995 226
Implementation on May 1, 1996
GB/T4667-1995
Requires each measurement to be accurate to 0.1cm. When measuring, the steel ruler is placed on the fabric perpendicular to the edge of the fabric to be measured. 7.2 Method 1
7.2.1 For fabrics longer than 5 m
7.2.1.1 Temporary marking for moisture conditioningbzxZ.net
Put the fabric on the measuring table, lay it flat for 1 to 2 m at the head end, remove the tension, and make a temporary mark at the edge of the fabric about 1 m away from the head end; then pull the fabric until the middle part is flat, remove the tension, and make a second temporary mark; then gently pull the remaining part of the fabric until the last 1 to 2 m of the fabric is flat and the tension is removed, and then make a third temporary mark. 7.2.1.2 Moisture conditioning
Remove the tension from the fabric and fully expose it to the standard atmosphere for moisture conditioning. Moisture conditioning must continue until the difference in width at the three marks obtained by continuous measurement (the interval between continuous measurements is at least 24 hours) is less than 0.25% of the width at each mark. 7.2.1.3 Final measurement
Erase the temporary marks on the fabric and place it on the table. According to the method specified in 7.2.1.1, measure the width of the fabric at least 5 places with nearly equal spacing (no more than 10m). The measurement position is at least 1m away from the head and tail of the fabric. 7.2.2 For fabrics (samples) with a length of 0.5~5m, place the fabric flat on the table, remove the tension, and mark at least 4 marks at equal spacing close to the edge of the fabric, but the first and last marks should not be marked at one-fifth of the length of the sample from both ends of the fabric. Then, according to the provisions of 7.2.1.2, expose the sample to standard atmosphere for humidity adjustment, measure the width at each mark and record the final reading of each measuring point. 7.3 Method 2
7:3.1 Measurement of width
First, remove the tension from the fabric and place it in normal atmosphere for at least 24h, and then measure the width of the fabric according to the method specified in 7.2.1.3. 7.3.2 Determine the correction factor
7.3.2.1 Marking
Put the fabric on the measuring table and gently pull it until the middle 2-3m part of the fabric lies flat on the table, remove the tension, then make 4 marks on this part close to the edge of the fabric, with a distance of 50cm (at least 25cm) between the marks. Measure and record the width at the 4 marks.
7.3.2.2 Humidity conditioning and final measurement
Expose the fabric marked for the test in 7.3.2.1 (it can be cut or not from the whole piece of fabric) to the standard atmosphere for at least 24 hours, and then continuously measure the width at the marked part (the interval between continuous measurements is at least 24 hours) until the difference in the width of the 4 marked parts is less than 0.25% of the width of each marked part. Record the average of the last 4 readings. The correction factor is the ratio of the average width of the fabric marked part after humidity conditioning to the average width of the fabric marked part before humidity conditioning. 8 Calculation of results
8.1 Method 1
8.1.1 Calculate the average value of the several width data measured in accordance with 7.2.1.3 or 7.2.2, which is the width of the fabric. 8.1.2 Record the minimum and maximum values ​​of the width. 8.2 Method 2
8.2.1 Calculate the fabric width by formula (1):
w. =w,xw
W. — fabric width after conditioning, cm; W, — average width of the fabric after relaxation (see 7.3.1), cm; Ws — average width of the fabric at the marked point after conditioning (see 7.3.2.2), cm; — average width of the fabric at the marked point before conditioning (see 7.3.2.1), cm. W.
Use formula (2) to calculate the minimum and maximum widths:
Wherein: W.-
GB/T4667-1995
The minimum or maximum width of the fabric after conditioning, cm; Wmr
The minimum or maximum width of the fabric after relaxation, cm; w
Ws—The average width of the fabric at the mark after conditioning (see 7.3.2.2), cm; W.—The average width of the fabric at the mark before conditioning (see 7.3.2.1), cm. 8.3 Calculation accuracy
The calculation is accurate to 0.01 cm, using the provisions of GB8170, and rounded according to the grades listed in the table below. Width, cm
Accuracy, cm
Test report
The test report should include the following contents:
Above 10～50
State that the test is carried out in accordance with this standard;
Specimen name and specifications;
Test date;
Fabric width (and indicate whether the selvedge is included); Minimum and maximum fabric width;
Determination method;
Details of any deviation from this standard.
Above 50～100
Above 100
·(2)
GB/T4667-1995
Appendix A
How to place fabrics during humidity conditioning and measurement
(Supplement)
A1 In order to remove the tension of fabrics during humidity conditioning and fully expose them to the standard atmosphere, the fabrics can be folded loosely on the table with appropriate amplitude, as shown in Figure A1.
A2 When marking and measuring fabrics, the marked and measured parts must be free of tension and laid flat on the measurement table, and the remaining parts can be folded at both ends of the measured part of the fabric to form a pile of fabrics, as shown in Figure A2. If the measurement table is not long enough, additional tables of the same height and width can be added at both ends of the measurement table to form a continuous rectangular tabletop with the measurement table.
Scope of application
Appendix B
Conventional measurement methods
(Supplement)
The methods specified in this appendix are generally used for routine tests for internal quality control. B2 Measurement method
Measure the fabric width in the following manner. B2.1 The measurement can be carried out in normal atmosphere. Figure A2
B2.2 First, use a steel ruler to evenly measure the width at least 5 places on the fabric, with an accuracy of 0.1cm, and calculate the average, which is the width of the fabric section. The measurement position is at least 1m away from the head and tail of the fabric. B3 Result calculation
Calculate the average value of all measurement results, with an accuracy of 0.01cm, and round it off to 0.1cm according to GB8170. 229
Additional instructions:
GB/T4667--1995
This standard is proposed by the China National Textile and Apparel Council and is under the jurisdiction of the Standardization Research Institute of the China National Textile and Apparel Council. This standard was drafted by Shanghai Textile Standard and Metrology Research Institute. The main drafter of this standard is He Jieren.
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