DIN EN 12127-1997 Textiles - Fabrics - Determination of mass per unit area using small samples German version EN 12127 1997《纺织品 织物 小样测定单位面积质量》.pdf

1、DEUTSCHE NORM December 1997 Textile fabrics English version of DIN EN 12127 Determination of mass per unit area using small samples DIN EN 12127 ICs 59.080.30 Descriptors: Textiles, fabrics, mass per unit area, testing. Supersedes DIN 53854, June 1993 edition, and DIN 53884, July 1976 edition. Texti

2、lien -Textile Flchengebilde - Bestimmung der flchenbezogenen Masse unter Verwendung kleiner Proben European Standard EN 12127: 1997 has the status of a DIN Standard. A comma is used as the decimal marker. National foreword This standard has been prepared by CEN/TC 248. The responsible German body in

3、volved in its preparation was the Normenausschu Materialprfung (Materials Testing Standards Committee). DIN IS0 1 O01 2-1 is the standard corresponding to European Standard EN 3001 2-1 referred to in clause 2 of the EN. Amendments DIN 53854, June 1993 edition, and DIN 53884, July 1976 edition, have

4、been superseded by the specifica- tions of EN 12127. Previous editions DIN 53854: 1956-09, 1963-1 1, 1975-08, 1993-06; DIN 53884: 1963-1 2, 1976-07. EN comprises 6 pages. No pari of this standard may be reproduced without the prior permission of Ref. No. DIN EN 12127 : 1997-1 Y Deutsches Institut fr

5、 Normung e. V., Berlin. wth Verlag GmbH, D-10772 Berlin, has the exclusive right of sale for German Standards (DIN-Normen). English price group 06 Sales No . 1106 05.98 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12127 October 1997 ICs 59.080.30 Descriptors: Textiles, fabrics, mass per unit

6、 area, testing. English version Textiles - Fabrics Determination of mass per unit area using small samples Textiles - toffes - Dtermination de la masse surfacique sur de petits chantillons Masse unter Verwendung kleiner Textilien - Textile Flchengebilde - Bestimmung der flchenbezogenen Proben This E

7、uropean Standard was approved by CEN on 1997-07-1 9. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references con

8、cerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own

9、 language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, the Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Sp

10、ain, Sweden, Switzerland, and the United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1997. CEN - All rights of exploitation in any form and by any means reserved worldwide

11、 for CEN national members. Ref. No. EN 12127 : 1997 E Page 2 EN 12127: 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 248 “Textiles and textile products“, the secretariat of which is held by BSI. This European Standard shall be given the status of a national sta

12、ndard, either by publication of an identical text or by endorsement, at the latest by April 1998, and conflicting national standards shall be withdrawn at the latest by April 1998. According to the CENEENELEC Internal Regulations, the national standards organizations of the following countries are b

13、ound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland. Ireland. Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Page 3 EN 12127: 1997 Introduction This method for the determi

14、nation of mass per unit area is based on the measurement of small samples of fabrics in the conditioned and/or oven-dry state. Other possible methods are described in IS0 3801 Textiles - Woven Fabrics - Determination of mass per unit length and mass per unit area. 1 Scope This standard describes met

15、hods for the determination of the mass per unit area using small samples in the standard atmosphere for testing and/or oven-dry. It is applicable to woven and knitted fabrics. It may also be applicable to fabrics produced by other techniques. 2 Normative References This European Standard incorporate

16、s by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European s

17、tandard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 201 39: 1993 Textiles - Standard atmospheres for conditioning and testing. (IS0 139: 1979) EN 300 1 2- 1 : 1 993 Quality assurance requirements for meas

18、uring equipment - Part 1 : Metrological confirmation system for measuring equipment. (IS0 1 O01 2-1 : 1992) 3 Definition For the purposes of this Standard the following definitions apply: 3.1 mass per unit area: Mass of a known area of fabric divided by that area, expressed in grams per square metre

19、. 4 Principle The sample of fabric is conditioned in the relaxed state, specimens are cut, and weighed in the conditioned and/or oven-dry state, and the mass per unit area is calculated. 5 Sampling 5.1 Sampling from fabrics Select specimens either in accordance with the procedure laid down in the ma

20、terial specification for the fabric, or as agreed between the interested parties. In the absence of an appropriate material specification an example of a suitable sampling procedure is given in Annex A. An example for selecting test specimens from a laboratory sample is given in Annex B. Avoid test

21、specimens with folded or creased areas, selvedges and areas not representative of the fabric. For non-homogeneous fabrics select specimens representative of the various areas which shall be defined as agreed between the interested parties. Page 4 EN 12127: 1997 5.2 Sampling from garments When possib

22、le take a specimen from each of the different parts or elements of the garment. Example: For long leg underwear take two specimens from each leg and one from the top section. 6 Apparatus Testing equipment used shall conform to EN 3001 2-1 :1993 6.1 Cutting devices 6.1 .I Cutting device with an area

23、of cut of minimum 100 cm2 capable of cutting to an accuracy of k 1 %. 6.1.2 Scissors, if no cutting device is to be used. 6.2 Rule graduated in 0,5 mm. 6.3 6.5 6.6 6.7 Desiccator. Balance accurate to * 1 mg. Weighing bottles of suitable dimensions for the test specimens. Drying oven capable of maint

24、aining (105 3) OC and equipped with air circulation. 7 Atmosphere for conditioning and testing The atmosphere for preconditioning, conditioning and testing shall be as specified in EN 201 39:1993 8 Procedure 8.1 Relaxation of fabrics It is important to assure that the fabrics are in the relaxed stat

25、e prior to testing. The fabrics shall be kept in a flat tension-free state for at least 24 h, during conditioning as specified in clause 7. Knitted fabrics may require a prior relaxation treatment in addition, as agreed between the parties. This shall be stated in the test report. 8.2 Determination

26、of area Cut out at least five test specimens of minimum 1 O0 cm2 using the cutting device (6.1 .l) or scissors (6.1.2), avoiding distortion of the fabric. When using the cutting device use the area of the cutting device for the calculation (see clause 9). When using scissors take three measurements

27、of the length and three of the width of each test specimen, to the nearest 1 mm. From the mean values of length and width calculate the cut area of each test specimen, rounding the result to three significant figures. Use this measured area for the calculation (see clause 9). 8.3 Determination of ma

28、ss in the standard atmosphere for testing. Weigh the individual test specimens and record each value, to the nearest 1 mg. Page 5 EN 12127: 1997 8.4 Determination of oven-dry mass. Preheat the oven to (105 i 3) OC. Place the test specimens individually in weighing bottles and place the bottles with

29、the lid adjacent to them in the oven and dry to constant mass, which shall be considered as attained when no progressive change in mass greater than 0,l % occurs in successive weighings seperated by a drying period of at least 40 min. NOTE: Experience has shown that a four hour drying period is suff

30、icient for most textile fabrics. After drying place the lids on the weighing bottles and cool the bottles in a desiccator. Weigh the specimen in the bottle, and the bottle alone, and record each value. Calculate the individual oven-dry mass of each test specimen. 9 Expression of results For each tes

31、t specimen, calculate the mass per unit area, M, in grams per square meter using the following formula: mx loo00 A M= where: m is the mass of a test specimen conditioned or oven-dry, in grams; A is the area of the same test specimen, in square centimetres. Calculate the mean mass per unit area in gr

32、ams per square metre and round the result to three significant figures. If required, calculate the coefficient of variation to the nearest 0,l %, the 95 % confidence limits and/or minimum and maximum values, rounded to three significant figures. IO Test report The report shall include the following

33、information. a) The reference to this standard and the date of test; b) identification of the test sample and if required, the sampling procedure; c) any treatment applied to the material before the test, and especially for knitted fabrics if any specific relaxation procedure has been carried out; d

34、) the conditions of testing, in the standard atmosphere andlor oven-dry; e) any deviation from the given procedure; f) mean mass per unit area, in grams per square metre; g) if required, the coefficient of variation, in percent; h) if required, the 95 percent confidence limits, in grams per square m

35、etre; i) if required, minimum and maximum values for test specimens, in grams per square metre. Page 6 EN 12127: 1997 ANNEX A (informative) Suggested prodedure for sampling A.l Bulk Sample (number of pieces from a shipment or lot) Take at random from the shipment or lot the appropriate number of pie

36、ces as given in table 2. Ensure that no piece that shows signs of damage or dampness incurred during transit is included in the sample. Table A.l - Bulk sample Number of pieces in shipment or lot 3 or less 11 to 30 31 to 75 76 or more 4 to 10 A.2 Laboratory samples Number of pieces in bulk sample, m

37、inimum 1 “ z 3 4 5 From each piece in the bulk sample, cut (from a position taken at random but at least 3 m from an end of the piece) a laboratory sample of length at least 1 m and of full width. Ensure that areas that are creased or that have a visible fault are not included in the sample. ANNEX B (informative) Example of cutting test specimens from a laboratory sample I I I I I I I I I I I I I I I 50 rnm I I f-w I I I I I I I I I I i I t o 0 o o I I I I I I I I I I I I I I I 115 mm - I I I I I I I I I I I I I I I I width of fabric