DIN EN 1049-2-1994 Textiles woven fabrics construction methods of analysis part 2 determination of number of threads per unit length (ISO 7211-2 1984 modified) German version EN 10.pdf
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1、UDC 677.074:677.017.3:620.168.2 DEUTSCHE NORM February 199# Determination of number of threads per unit Construction and methods of analysis (IS0 721 1-2 : 1984, modified) English version of DIN EN 1049-2 length of textile woven fabrics DIN - EN 1 049 Part 2 This standard incorporates the modified E
2、nglish version of IS0 721 1-2. Textilien; Gewebe; Konstruktion, Untersuchungsverfahren; Bestimmung der Anzahl der Fden je Lngeneinheit (IS0 721 1-2: 1984, modifiziert) Supersedes DIN 53853, January 1973 edition. European Standard EN 1049-2:1993 has the status of a DIN Standard. A comma is used as th
3、e decimal marker. National foreword This standard has been published in accordance with a decision taken by CEN/TC 248 to adopt International Standard IS0 721 1-2 as a European Standard. The responsible German body involved in the preparation of this standard was the Normenausschu Materialprfung (Ma
4、terials Testing Standards Committee). DIN EN 20 139 is the standard corresponding to International Standard IS0 139 referred to in clause 2. Standards referred to (and not included in Reference) DIN EN 20 139 Textiles; standard atmospheres for conditioning and testing Previous editions DIN DVM 3801
5、Part 4 = DIN 53801 Part 4: 01.37; DIN 53 853: O1 55, 01.73. Amendments DIN 53853, January 1973 edition, has been superseded by the specifications of DIN EN 1049-2, which is identical to IS0 721 1-2. International Patent Classification D 06 H 003/00 G O1 N 033/36 EN comprises 8 pages. Beuth Verlag Gm
6、bH, Berlin, has the exclusive right of sale for German Standards (DIN-Normen). DIN EN 1049 Pari 2 Engl. Price group 7 08.94 Sales No. 1107 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1049-2 December 1993 UDC 677.074: 677.01 7.3: 620.1 68.2 Descriptors: Textiles, woven fabrics, testing, dete
7、rmination, number of threads, yarns. English version Textiles Construction - Methods of analysis Determination of number of threads per unit length (IS0 721 1-2 : 1984, modified) Woven fabrics Textiles: tissus: construction; mthodes danalyse: dtermination du nombre de fils par unit de longueur (IS0
8、721 1-2: 1984, modifie) Textilien; Gewebe; Konstruktion, Unter- suchungsverfahren; Bestimmung der Anzahl der Fden je Lngeneinheit (IS0 721 1-2: 1984, modifiziert) This European Standard was approved by CEN on 1993-12-16 and is identical to the IS0 Standard as referred to. CEN members are bound to co
9、mply 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 concerning such national standards may be obtained on application to the Central Se
10、cretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a GEN member into its own language and notified to the Central Secretariat has the same status as the of
11、ficial versions. CEN members arethe national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de
12、 Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels O 1993. Copyright reserved to all CEN members. Ref. No. EN 1049-2:1993 E Page 2 EN 1049-2 : 1993 Foreword This European Standard has been taken over by CENiTC 248 Textiles and textile products from
13、 the work of TC 38 Textiles of the International Organization for Standardization (SO). It is based on IS0 721 1-2: 1984 Textiles; woven fabrics: COnStrUCtiOn; methods of analysis; determination of number of threads per unit length This European Standard shall be given the status of a national stand
14、ard, either by publication of an identical text or by endorsement, and conflicting national standards withdrawn, by June 1993 at the latest. In accordance with the CENICENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finl
15、and, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard IS0 721 1-2: 1984 was approved by CEN as a European Standard with agreed common modifications as
16、given below.*) *) Translators note. All modifications have been incorporated in the text of the EN. Page 3 EN 1049-2 : 1993 1 Scope and field of application This part of IS0 7211 specifies three methods for the deter- mination of the number of threads per centimetre in woven fabrics. Any of the thre
17、e methods may be used, the choice depending on the character of the fabric. However, in case of dispute method A is recommended. Method A: Dissection of fabric, suitable for all fabrics. This is the most laborious method but has fewer limitations than the others; in particular, it is the only one th
18、at is really suitable for the examination of certain folded structures and other complicated weaves. Method 6: Counting glass, suitable for woven fabrics with more than 50 threads per centimetre. Method C: Traversing thread counter, suitable for all fabrics. Where the number of threads per centimetr
19、e is low, it may be convenient to express the results as the number of threads per decimetre. NOTE - Methods using parallel line gratings and tapered line gratings have been given in the annex for information. These methods have not been considered accurate enough to be used as standard test methods
20、 but can be used to give rough and ready estimates for routine testing. 2 Reference I SO 139, Textiles Standard atmospheres for conditioning and testing. 3 Principle Three methods of determining the number of threads per centimetre are specified, any of which may be used, the choice depending on the
21、 character of the fabric. The prin- ciples are as follows: Method A: A section of fabric of dimensions in accor- dance with those given in clause 4 is dissected and the number of threads counted. The threads that are to be counted are preferably short, 1 or 2 cm being suitable. Method 6: The number
22、of threads visible within the aperture of a specified counting glass is determined. Method C: The number of threads per centimetre of the fabric is determined with the aid of a traversing thread counter. 4 Minimum measuring distance Use the appropriate minimum measuring distance specified in the tab
23、le. Table - Minimum measuring distance Accuracy in (count to within cm 0.5 thread) Number Number Minimum distance of threads measuring of threads percentage per pei test Less than 10 10 to 25 50 to 125 1.0 to 0.4 25 to 40 75 to 120 0.7 to 0.4 More than 40 For the method A, take test pieces containin
24、g at least 100 threads. For narrow fabrics having a width of 10 cm or less, count all warp threads including the selvedge ends and express the result as threads per full width. When fabrics are patterned by broad areas of higher or lower density of thread spacing, select test specimens containing at
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