1、UDC 677.076.4 : 677.01 7.25 : 620.1 : 531.751 DEUTSCHE NORM August 1992 - DIN Textiles Test methods for nonwovens EN 29 073 Determination of mass per unit area (IS0 9073-1 : 1989) English version of DIN EN 29073 Part 1 I Part 1 This standard incorporates the English version of Is0 9073-1. Textilien;
2、 Prfverfahren fr Vliesstoffe; Bestimmung der flchenbezogenen Masse (IS0 9073-1 : 1989) Supersedes parts of DIN 53 854, August 1975 edition. European Standard EN 29 073-1 : 1992 has the status of a DIN Standard. National foreword This standard has been published in accordance with a decision taken by
3、 CENTTC 248 to adopt, without alteration, International Standard IS0 9073-1 : 1989 as a European Standard. The responsible German body involved in the preparation of this standard was the Normenausschu Materialprfung (Materials Testing Standards Committee), Technical Committee Prfung von Vliesstoffe
4、n. The DIN Standards corresponding to the International Standards referred to in clause 2 of the EN are as follows: IS0 Standard DIN Standard IS0 139 IS0 186 DIN IS0 186 IS0 3801 DIN 53 854 DIN EN 20 139 Standards referred to (and not included in Normative references) DIN EN 20 139 Textiles; standar
5、d atmospheres for conditioning and testing DIN IS0 53 854 Testing of textiles; determination of mass of textile fabrics (except knitted fabrics) Previous edition DIN 53 854: 08.75. Amendments In comparison with DIN 53 854, August 1975 edition, the following amendments have been made. a) The scope of
6、 the standard has been limited to cover nonwovens only. b) Testing requires a minimum of three test pieces, each having a test area of at least 500 cm2 (or 50 O00 mm2). c) The actual size of test area is to be agreed, depending on the type of nonwoven. d) The coefficient of variation of the mass per
7、 unit area is to be calculated. EN comprises 4 pages. DIN EN 29 073 Part 1 Eng/. Price group 5 Beutn Verlag GmbH. Berlin. has the exclusive right of sale for German Standards (DIN-Normen) 06.93 Sales No 1105 EUROPEAN STANDARD NORME EUROPENNE EN 29 073-1 EUROPISCHE NORM June 1992 UDC 677.076.4 : 677.
8、017.25 : 620.1 : 531.751 Descriptors: Textiles, fabrics, nonwovens, testing, measurement, mass per unit area. English version Textiles Part 1: Determination of mass per unit area Test methods for nonwovens (IS0 9073-1 1989) Textiles; mthodes dessai pour nontisss. Partie 1 : Dtermination de la masse
9、surfacique (IS0 9073-1 : 1989) Textilien; Prfverfahren fr Vliesstoffe. Teil 1: Bestimmung der flchenbe- zogenen Masse (IS0 9073-1 : 1989) This European Standard was approved by CEN on 1992-06-26 and is identical to the IS0 Standard as referred to. CEN members are bound to comply with the CENKENELEC
10、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 Secretariat or to any CEN m
11、ember. This European Standard exists in threeofficial versions (English, French, German). Aversion 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 official versions. CEN member
12、s are the 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 Normalisation Europisches
13、 Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 01992. Copyright reserved to all CEN members. Ref. No. EN 29 073-1 : 1992 E Page 2 EN 29 073-1 : 1992 Foreword International Standard IS0 9073-1 : 1989 Textiles; test methods for nonwovens; determination of mass per unit ar
14、ea has been adopted by CEN/TC 248 Textiles and textile products from the work of ISO/TC 38 Textiles. The document was submitted to the CEN members to the Unique Acceptance Procedure and was approved without any modification. In the countries bound to implement this European Standard, a national stan
15、dard identical to this European Standard shall be published, and conflicting national standards withdrawn, by 1992-12-31 at the latest. In accordance with the CENKENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, F
16、rance, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of the International Standard IS0 9073-1 : 1989 was approved by CEN as a European Standard without any modifi- cation. Page 3 EN 29 0
17、73-1 : 1992 1 Scope This part of IS0 9073 specifies a method for the determination of mass per unit area of nonwovens. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 9073. At the time of publication,
18、the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 9073 are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 main- tain registers of currentl
19、y valid International Standards. IS0 139 : 1973, Textiles - Standard atmospheres for con- ditioning and testing. IS0 186 ; 1985, Paper and board - Sampling to determine average qualiv. IS0 3801 : 1977, Textiles - Woven fabrics - Determination of mass per unit length and mass per unit area 3 Principl
20、e Measurement of the area and mass of a test piece and calcu- lation of its mass per unit area in grams per square metre. 4 Apparatus 4.1 among the following. Apparatus for cutting the test pieces, chosen from 4.1.1 50 o00 mrn2. Die, which cuts a test piece of an area of at least 4.1.2 Template, wit
21、h an area of at least 5OOOO mm* 1e.g. 250 mm x 200 mm) and a razor blade. 4.1.3 Steel rule, accurately graduated in millimetres, and a razor blade. 4.2 to an accuracy of IO.1 % of the determined mass. Balance, capable of determining the mass of a test piece 5 Sampling Carry out sampling in accordanc
22、e with IS0 186. NOTES 1 The optimum sample size will vary with different nonwovens and should be agreed between purchaser and vendor. The size should preferably not be smaller than the size specified in 4.1 due to anisotropy of various nonwovens. 2 Attention is drawn to the fact that with nonwovens,
23、 sampling error may be greater than the testing error. 3 This method of sampling recognizes and makes provisions for “anisotropy“ (differences in properties along various directions, prin- cipally machine and cross direction) in the final specimens. However, these specimens are random representative
24、s of the material and in some cases it may be desirable to investigate systematic variations of proper- ties (including anisotropyl, for example across the width, or in certain positions along the length of a given reel. In all such cases, special pro- visions should be agreed between purchaser and
25、vendor and recorded in the test report. A procedure for more detailed examination of variability within a given batch of material is available in TAPPI T 11-05-74 and may be found helpful. This publication may be obtained from; The Technical Association of Pulp and Paper Industries, 1 Dunwoody Park,
26、 Atlanta, Georgia 30338, USA. Page 4 EN 29 073-1 : 1992 6 Preparation and conditioning of test pieces 6.1 From each sample, cut at least three test pieces, each of an area of at least 50 O00 mm2, using either the die, or the template and a sharp razor blade. If there is insufficient material to cut
27、test pieces of the specified size, cut the largest rectangle possible and measure its area using the steel rule. NOTE - Although it is not recommended, the interested parties may agree on the use of a smaller test area, and this fact should be men- tioned in the test report clause 9 gll. If the coef
28、ficient of variation is required, use a minimum of five test pieces. 6.2 Condition the test pieces as specified in IS0 139. 7 Procedure Determine the mass of each piece in the standard atmosphere for testing (see IS0 139) using the balance (4.2). 8 Expression of results Calculate the mass per unit a
29、rea of each test piece, the mean value in grams per square metre and, if required, the coefficient of variation, as a percentage. 9 Test report The test report shall include the following information : ai a reference to this part of IS0 9073; b all details necessary for the identification of the material; ci the test results; di the mean value in grams per square metre; e) if required, the coefficient of variation, as a percentage; f) the conditioning atmosphere used; g) any unusual features noted during the testing, or devi- ations from the standard procedure.
