GB/T 2543.1-2001 Textiles - Determination of twist of yarn - Part 1: Direct counting method
Some standard content:
ICS.59.080.01
National Standard of the People's Republic of China
GB/T2543.1.2001
EQYSO2061:1995
Determination of twist in yarn-Part 1:Direct counting method2001-02-26 Issued
Implementation on September 1, 2001 Issued by the State Administration of Technical Supervision
CB/R 2543.1 2001
Textiles Determination of twist in yarn-Part 1:Direct counting method
This standard is revised as the second part: the use of IS 2061.5 textile products: multi-line determination of GE 2543.115 wire measurement method, this standard returns 0201: 1% 6 sample ratio, the above requirements are as follows:
the "measurement" quality is =, the "sample length 2" is the smaller of the "5 lengths" and "the sample length 2" is afraid of 10. Note 11. Article:
Compared with G3/3543.1·1689, the following technical contents are added: Cancel the optional counter\ auxiliary accuracy to 0.1 accuracy\ requirement, refer to the sample classification:
The sample system is added with meters Force statistics: 1N/x:
--· There is no regulation in the product standard agreement to take quantity and change: for single yarn, ply, or the order and test report are separately stipulated: the direct counting method is considered to be the most effective method in the quality determination method. The regression method has the advantages of simplicity and rapidity, and its accuracy is lower than that of the direct counting method. If necessary, a comparative verification with the direct counting method should be carried out before the test to correct the difference between this method and the direct counting method. This method is not recommended. This is shown.
This standard is submitted to the National Pharmaceutical Industry Association
The standard is issued by the National Pharmaceutical Group Standardization Technical Committee Tea Preparation Association Non-Technical Committee Busy Public Standard Number Single Unit Pharmaceutical Standardization Yao Institute of Industry Standardization This standard is the main body of the city.
GR/T2543.1-2001
ISO Foreword
ISO) (International Organization for Standardization) is an international alliance of national standardization organizations (ISO). The preparation of international standards is based on the technical requirements of ISO. Each member has the right to contact the committee, official and non-official international organizations, and can also work with the International Electrotechnical Commission for Standardization. All matters related to electrical and electronic standardization are related to the International Electrotechnical Commission for Standardization (EC). Get in touch.
The international standard draft adopted by the technical participants will be voted on by the participants. If the participants vote on it, it will be published as an international standard. The international standard ISO2051 is formulated by the TS ()/TC new product technical committee and the line member technical committee. The second level version has been established for technical characteristics, replacing the first version (IS02061: 1372). The appendix is a record of the requirements.
1 Standard A
National Standard of the People's Republic of China
Textiles
Determination of yarn twist
Part 1: Direct counting method
Texiles-Determining the twist of yarns Part 1: Direct counting method af twist in yarnPur't 1:Direct emunting methodGB/T2543.1--2001
eqy[so2061:1995
G/T2543.1--[989
This standard is: the F number method is used to identify the yarn, and the method of lengthening after the withdrawal is applicable to the following:
short fiber single fiber:
b) ply yarn:
c) slow yarn.
This method should be used in addition to the original or the policy, and can also be used to analyze the war from the fabric, the public method is not applicable to the tension from 0.5c>/tex to =.cNtex when the length of other yarns over 6.5: the proposed trace. This kind of fine tailoring can be tested under the relevant books, and the Dali method is suitable for single filaments and self-spun products to improve the effect of the determination of the yarn. This method is not suitable for the relevant yarn. This method will cause serious damage and deformation of the yarn during the test, affecting the test results. 2 Reference standards
The following are difficult to be included in the case of the standard. The provisions of this standard are quoted in this standard and then incorporated. When this standard is issued, the version shown is valid: All standards will be sealed. All parties using this standard should explore the possibility of using the latest version of the following standard. GB5 Standard atmosphere for humidity adjustment and testing of products with humidity of -1% or more 3 Definitions
This standard adopts the following definitions.
3.1 Rate of change Iwist
The whole length of the object thrown at a given length, expressed in metres (m), or as a number per centimetre (/em.):
3.2 Required length gglength
The distance between the two test points, 3.3 Initial test length of the specimen under specified stress at the start of the test 3.4 Rate of change of length bupeininngihnnniwistinp The ratio of the changed length after the test to the initial length, expressed as a percentage. 3-5 Yarn Fackige
In order to make the yarn fast and smooth, and to meet the requirements of the shape of the device, it can be without internal sealing, for example, the yarn is good and thin, but also can be with internal sealing, dream, angry axis
3.6 theoretical coefficient = wist tartot
GHT 2543.1DC1
The orientation of fibers or filaments in staple yarn or filament yarn is related to the angle between the fiber surface and the axis of the yarn or the light axis, which is related to the increase in the thickness of the yarn of the same product, and is the dramatic weight effect of the yarn caused by the static width. 4 Principle
Under the condition of a certain length of the test fence, the test fence is set, and the test is carried out according to the rotation speed. The yarn is withdrawn at the same speed until the yarn is half a line or half a line. According to the required number of rotations of the withdrawal speed, the yarn residual speed is calculated, and the test position is changed.
5.1 Change the test position. The tester has a clamp, one of which is a "pressure-rotation clamp", which can stop the rotation of the shaft and can be connected to at least one position of the counter. Move the clamp to change the length within the range of 1(rm-5n\m. The clamp has no gap. There is a tension device to measure the length of the sample, and its accuracy is 1.5mm1. The counting device can record or display the number of revolutions of the clamp. To test the contraction and extension of the clamp, the clamp can be counted in the dynamic system! No change should occur: 5.2.
5.3 Amplifying device for the mixed test:
5. 4 For grade 10 samples, a shaking sand device is available. 6 Standard atmosphere
According to the specification of GB6529, pre-conditioning and humidity adjustment tests are carried out. Usually, it is not necessary to pre-condition the samples before the test. Note: The chemical culture of the sample will affect the quality of the sample. Sampling
One of the following methods is used:
7.1 The sample is taken according to the relevant heat setting specified in the product standard or agreement. .2 If there is no provision in the product standard or agreement, the sample is taken according to the specification of A. The batch samples are taken according to A? The batch samples are taken from the laboratory.
8 Samples
8.1.1 The sample length of short-length single yarn is as long as possible, but the average length of the short fibers in the yarn is less than 0.01. The sample length usually used is shown in Table 1.讠
Smoke torch long crossing
End material category
Donate hot wool yarn
Coarse twisted wool yarn
Skinning flat fiber
8.1.2 Multifilament
When the nominal fiber is 7250 bob/m inch, the length of the two is 25mmrr).5r, 2
25 or 51
nn hair 25:
G B.T2543.1—2001
When the nominal tension is 12 grids, the length is 50nmm13.5m, 1.3 strands and cables
When the nominal grid is 12o/m:: the length of the braid is 250mn±c.5mWhen the nominal air change is 10 tower/m.m braid length%500mm±t.5mrr, 8.2 push
name.2 The test piece should be drawn from the end or front of the roll according to the actual service. In order to avoid bad sections, the length of each piece should be several meters.
22-2 If two or more members are selected from the old installation, the random interval between each sample should be less than 1m: If more than one test piece is collected from the same test piece, the test pieces should be divided into groups, with no more than 1 sample per group, and there should be a random interval between each group. 8.3 Number of samples
Day. 3.1 The number of samples specified in the product standard shall be arranged on the day. 3.2 If the product standard has a provision: the sample quantity can be obtained according to the product's temperature coefficient of variation and temperature requirements. 8.3.3 or 8.3.4.
8.3.3 If there are any deviation characteristics, the sample efficiency shall be calculated according to the formula given in the table on the day of the month to ensure that the specified precision is achieved under the general plastic cost level of 35.
Table 2 The method for determining the blood micro-test number and the oxygen test number is as follows: |tt||3--1on/m
±5.Heat/m
Through: It is the standard deviation required for the test, 1. The statistical data of the test results of similar materials are the result of a large number of tests. 8.3.4 If the number of test results is actually the same, the test results can be calculated in the following way: 8-3.4.1 According to the formula given in 3, the maximum number of test results can be determined when there is no test result. The method of determination is the same as that in 2. All the numbers are the same. > relatively /m
43--1on2/m
>100/m
new and hot
this is the type of milk
let's choose the number,|| 3.4.2 Calculate the coefficient of variation according to the effective method, or if the coefficient of variation is greater than 5% at the S5% probability level, then increase the number of tests and calculate the number of samples using formula (1): n-(1.fe2/5)g
Where: - number of samples:
:, the test result coefficient of variation is the statistical number of a large number of tests. Hold the second line with a small section and make it vertical to the product. Observe the vertical section of the small slant direction, which is consistent with GH/T 2543.1—2001
Determination of the degree of lapping
10.1 Preliminary test
G529 The test sample is allowed to reach hygroscopic equilibrium in the test atmosphere. The yarn is pulled from the end or side of the package with the minimum tension practicable in order to avoid changes in its original shape during the treatment of the sample. Cut a test sample and discard the yarn. After the test bar is fixed in the clamp, the sample can be removed from the garment. If another test bar needs to be taken from the old garment, the yarn head should be pressed with a fixed head or a heavy object to avoid padding. 10.2 Single Fiber Yarn
10.2.1 According to the length of the micro-meter yarn, adjust the position of the movable clamp needle to check the length of the test bar. The distance between the two openings will affect the holding length of the test bar. Exclude the movement of the clamp and use the accurate caliper to measure the height of the clamp to check the holding length of the sample. Set the counter to zero. 10.2.7 For yarns with a net length of 0.5-0.1>6x, the tension shall be added to the sample in the test. If the net length of the yarn under the current tension does not reach or exceed 3.5, pre-tension shall be added so that the net length does not exceed 0.1. Note: This exceptional situation shall be noted in the test report after agreement among the relevant parties. 1.2.3 Move the moving light back until the analysis can be moved from the non-moving position to the fixed position: if necessary, ensure complete backing:
10.2.4 Retract the sample to see if the sample is consistent with the test in Chapter 9. 10.2.5 Verify that the sample is the initial length 1. Move the sample back to the known direction. 10.2.6 Repeat the above steps until the test is completed. The sample can be adjusted to the required length. 10.3
1.3.1 Adjust the distance between the test bases to 2m = U. or 1.5m. The original length of the sample will be eliminated. Open the scale or gauge to measure the distance between the light properties to adjust the light intensity of the sample. The dynamometer will be used for testing.
10.3.2 The short needle auxiliary single-piece season step is as follows 1).%2--1C.2.5, 1.3.3 The length of the sample after the retreat is realized, and the length change is recorded after the two tensions are added. Note the length increase or decrease in the center 11.3.4. The test piece is measured by 1, and the test piece is tested to the required test number. 1C.4 Strands
10.4.1 According to the procedure of the strands exchange grams 10.5.11G.3.3, the actual length of the wire is measured. 1J.4.2 The length of the strands is removed. Cut off the excess single and only one strand is collected. If the composition of the yarn is different from that of the traditional yarn, then the composition should be tested:
If the yarn is of the same grade as the original fiber, then additional samples should be added. The new section of the new yarn can be produced at the beginning of the month to ensure that the size is not restored for a long time. The effective test is carried out.
14.3 If the effective yarn is a short yarn, then according to 2, measure its tension, preferably the single yarn is female, and the purchase of technical tire 10.3 to correct its tension,
1. Car, 4 If the length after the withdrawal is changed, the clamp will be weighed for fear of rising, and the length of the sample after withdrawal is measured under the pre-tensioning square. Note the change in length, the length of the product is increased or increased with the core 10.4.5 single compound 1: all samples are tested. 13.5 The length of the burning line
1 is the same as the length of the single compound.
GB/T 2543. 1 2001
10.5.1 Determination of the total thickness of the yarn according to the procedure 0.3.1 to 10.3.3. 105.2 After removing the front part of the yarn, cut off the remaining strands and keep only the undamaged strands. Note the length of the strand under tension and measure the yarn thickness according to the procedure 10.3.1 to 10.2.3. 10.5.2 If the yarn is mostly single yarn, only one of them can be kept. 10.5.4 If this single thread is a short thread, its brightness shall be determined according to the heat treatment method in 10.2. If this single thread is a multi-filament, its density shall be determined according to the standard of 10.10.5.5 We need to loosen the movable clamp at the same time to measure the change in length of the sample after tension. 10.5.6 Continue the test for more than five times until the required length of the sample is met. 11 Calculation
1t.1 Sample heat bottom
Sample rush according to the formula (:
Where: i
Sample difference. Press / mF
Test increase initial, mm:
Sample gain number.
11.2 Sample average holding time
Sample average speed according to the formula (H meter sound:
- Sample average drop:
Where: -
Total chaos of all test rails
Test details
11.3 Variation of the situation
If necessary, follow the dynamic system : The coefficient of variation of the calculation method is 5. The confidence interval of the relevant risk. 11.2 The rate of change of the length of the retreat is calculated by the formula (4). The length rate is calculated by the length rate. 1
The length after the test is recorded: bzxz.net
[--length before the retreat:
The length of the retreat is
If the distance is negative, the rate of the end is.
The reliability of the short fiber value is not reported. 11.5 The final coefficient
is tested by the new formula (5):
-r(T/1 000)/
Wherein: ——Specific gravity:
1—doping degree, with /r1
Note 1, is the effective coefficient: calculation -
Note to be used as / effective formula - calculation, degree unit 5
GH/T 2543.1—2001
The formula is not the same as
12 Test report
The test report should include the following:
a) The test period is in accordance with this standard:) Product form (tape yarn, warp yarn, or woven yarn:) Sample method:
Number of test samples,
Center tension;
f: Length, change, mm;
g) Details of deviation from this standard,
In addition to the above, the following information is given for each yarn type: 12.1 single style
) yarn flatness: average finishing of individual packages if needed: 9 confidence interval:
) yarn grab interval 1
average elongation rate (limited to the requirements): e) teaching coefficient (if needed!
[; economic variation coefficient,
a) average of the whole stock: average finishing of the package! Required fee): h: single yarn average speed: the speed of each winding: refers to the taste of the single yarn after the return); ) ply yarn maintenance:
1) the average elongation or contraction rate of each ply and each single yarn (if necessary)) carrying capacity (required fee)
12.3 system
) average length of the cable, the average cable replacement rate in each installation (if necessary) continuous flat plan, the average length of each installation (the maximum replacement rate after the return of the girl required fee)) the hook degree: the single system and replacement (referring to the sufficient return d) The trend of the yarn strands and the winter effect:
) The reduction factor of the strands and the individual items as required:
B/2543.1-20
Appendix A
(Appendix to the specification)
Vertical sampling procedure
A1 Bulk samples (extracts from a batch or a single shipment) In accordance with A1, take bulk samples from the batch of goods to be tested, taking care not to take boxes that have been pre-damaged or subjected to transportation. Table A1
Number of transfers or shipments
4 -- 10
11--30
TG&E on
? The test sample shall be drawn from at least one package of the batch of product. The samples in the box should be similar. The samples must be randomly drawn from the top, middle and bottom layers of the box and from the middle and sides of these layers. The number of samples drawn from each package of the test product should be as close as possible. If there are samples to be drawn from the machine or the material, the product should be able to provide a sufficient number of samples. When drawing the test sample, it should be noted that there should be no changes in the yarn. When the test machine is weaving, the samples should be taken from different yarns in the weaving process. The samples should be representative of the fiber tube as much as possible. This special sampling method should be explained in the notice.
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