1、Ref. No. DIN 53362 : 2003-10English price group 07 Sales No. 010712.04DEUTSCHE NORM October 200353362Continued on pages 2 to 5. No part of this translation may be reproduced without the prior permission ofDIN Deutsches Institut fr Normung e.V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has th
2、e exclusive right of sale for German Standards (DIN-Normen).Determining the flexural rigidity of plastic filmand woven textile fabrics with or without plasticcoating by the cantilever methodTranslation by DIN-Sprachendienst.In case of doubt, the German-language original should be consulted as the au
3、thoritative text.ICS 59.080.40; 83.140.10Prfung von Kunststoff-Folien und von textilen Flchengebilden(auer Vliesstoffe), mit oder ohne Deckschicht aus Kunststoff Bestimmung der Biegesteifigkeit Verfahren nach CantileverIn keeping with current practice in standards published by the International Orga
4、nization for Standardization(ISO), a comma has been used throughout as the decimal marker.Supersedes January 1980edition.ContentsPageForeword . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Amendments . . . . . . . . . . . . . . . . .
5、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Previous edition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6、 . . . . . . 22 Normative references . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 Concepts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Apparatus . . . . . . . . . . . . . . . . . . . . . . .
7、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Samples and specimens . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Evaluation
8、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Test report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5Explanatory notes . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9、. . . . . . . . . . . . . . . . . . . . . 5ForewordThis standard has been prepared by Technical Committee Kunststoff-Folien und kunststoffbeschichteteFlchengebilde (Kunstleder); allgemeine Eigenschaften of the Normenausschuss Kunststoffe (PlasticsStandards Committee).AmendmentsThis standard differs
10、from the January 1980 edition in that:a) nonwovens are no longer covered;b) specifications for the flexural rigidity per unit width have been included (in accordance withDIN EN ISO 9073-7);c) some calculation errors have been corrected;d) it has been editorially revised and references have been upda
11、ted.Previous editionDIN 53362: 1980-01.Page 2DIN 53362 : 2003-10All dimensions are in millimetres.1 ScopeThis standard specifies a method of measuring the overhanging length of a specimen taken from plastic filmand textile fabrics with or without plastic coating as in DIN 16922, and of calculating t
12、he flexural rigidity on thebasis of the overhanging length. The method does not apply to nonwovens, which are covered byDIN EN ISO 9073-7, or to specimens of products that tend to bend, curl or roll over at cut edges or have a veryhigh or very low flexural rigidity.2 Normative referencesThis standar
13、d incorporates, by dated or undated reference, provisions from other publications. These norma-tive references are cited at the appropriate places in the text, and the titles of the publications are listed below.For dated references, subsequent amendments to or revisions of any of these publications
14、 apply to thisstandard only when incorporated in it by amendment or revision. For undated references, the latest edition ofthe publication referred to applies.DIN 16906 Sampling and conditioning of samples for testing plastic film and sheetingDIN 16922 Classification of flexible sheeting produced us
15、ing plasticsDIN 53350 Determining the flexural rigidity of plastic film and plastic-coated textile fabrics by theOhlsen methodDIN 53598-1 Statistical evaluation based on random sampling with examples from rubber and plasticstestingDIN 53804-1 Statistical evaluation Measurable (continuous) characteri
16、sticsDIN 53864 Determining the flexural rigidity of textiles by the Schlenker methodDIN EN 12751 Textiles Sampling of fibres, yarns and fabrics for testingDIN EN ISO 291 Plastics Standard atmospheres for conditioning and testing (ISO 291 : 1997)DIN EN ISO 9073-7 Test methods for nonwovens Part 7: De
17、termination of bending length(ISO 9073-7 : 1995)ISO/DIS 139 : 2002 Textiles Standard atmospheres for conditioning and testing3 Concepts3.1 Overhanging lengthThe length of the unsupported portion of a horizontal specimen of specified dimensions that deflects under itsown mass to the extent that its l
18、eading edge just touches an imaginary plane bounded by two lines (designatedby lo).3.2 Cantilever bending force per unit lengthThe ratio of the mass of the specimen, m, to its length, l, multiplied by the acceleration due to gravity, gn(designated by F1).3.3 Flexural rigidityA measure of the resista
19、nce of a specimen to bending forces (designated by B).4 Apparatus4.1 FlexometerA flexometer as shown in figure 1 shall be used, comprising the following components:Page 3DIN 53362 : 2003-10Key:1 Platform2 Slide3 Guide4 Transparent side5 SpecimenFigure 1: Flexometera) A horizontal platform.b) A rigid
20、 metal slide on the horizontal platform having a scale with divisions enabling the overhanging lengthof the specimen to be read to an accuracy of 0,5 mm. The slide shall have a minimum length of 250 mm, awidth of (25 t 1) mm, a mass of 10 g per 10 mm and a constant cross section over its length.NOTE
21、: The cross section of the slide shall be such that the scale can be read largely without parallax (e.g.as a result of having bevelled reading edges or a triangular cross section).The lower side of the slide shall be provided with a non-slip layer (e.g. made of rubber) so that the specimen,which is
22、to be placed between the slide and platform during the test, can be moved forward uniformly withoutslippage when the slide is advanced. If sticking occurs between the specimen and the platform when theslide is moved, this can be prevented by lightly sprinkling the platform with talcum.c) Two transpa
23、rent side pieces with two inscribed sighting lines, L1and L2, inclined at 41 30q to thehorizontal and intercepting the front of the platform.Optionally a mirror mounted on one side in which the two lines, L1and L2, can be observed to facilitate theiralignment. The edge of the mirror shall be below t
24、he lines L1and L2on one of the transparent sides, parallelto the lines and inclined at 45 to them.It is advisable to fit a guide along which the slide can be moved without the overhanging end of the specimentouching the sides.4.2 Means of measuring length, capable of measuring the length and width o
25、f a specimen to an accuracyof 0,5 mm. The slide of the flexometer may be used for this purpose.4.3 Balance, capable of weighing to an accuracy of 50 mg.4.4 Stopwatch, capable of being read to an accuracy of 0,1 s.5 Samples and specimens5.1 Sampling and conditioning5.1.1 Products as in DIN 16922Sampl
26、es and specimens shall be collected as described in DIN 16906 and conditioned as specified inDIN EN ISO 291.5.1.2 Uncoated textile fabricsSamples and specimens shall be collected as described in DIN EN 12751 and conditioned as specified inISO/DIS 139.loPage 4DIN 53362 : 2003-105.2 Shape and number o
27、f specimensTen specimens 25 mm wide and 250 mm long shall be taken from the sample parallel to the machine directionand an equal number of specimens in the cross-machine direction.6 Procedure6.1 Carry out the test in standard atmosphere (see clause 5).6.2 Determine the length and width of the specim
28、en to an accuracy of 0,5 mm and the mass to an accuracyof 0,1 %.6.3 Position the specimen between the slide and platform so that the three leading edges are precisely aboveone another.NOTE: If the zero mark on the slide does not coincide with its leading edge, position it above the leading edgeof th
29、e specimen and the platform.Move the slide forward within 10 s until the leading edge of the specimen moving with it touches an imaginaryplane between L1and L2. If the leading edge of the specimen twists or bulges, its centre shall be regarded asthe leading edge. Read the overhanging length to an ac
30、curacy of 0,5 mm.6.4 Repeat the test in the same way at the other end of the specimen.7 Evaluation7.1 Calculate the cantilever bending force per unit length, F1, in mN/cm, using equation (1):F1= gn lm(1)7.2 Calculate the flexural rigidity per unit area, B, in mN cm2, using equation (2):B = F1 32ol(2
31、)The flexural rigidity per unit width, G, may be reported instead of or in addition to the flexural rigidity, B.Calculate the flexural rigidity per unit width in mN cm, using equation (3):G = bF132ol= mF 32ol104gn(3)In equations (1) to (3),F1is the cantilever bending force per unit length, in mN/cm;
32、B is the flexural rigidity per unit area, in mN cm2;G is the flexural rigidity per unit width, in mN cm;m is the mass of the specimen, in g;mFis the mass of the sample per unit area, in g/m2;b is the width of the specimen, in cm;l is the length of the specimen, in cm;lois the overhanging length of t
33、he specimen, in cm;gnis the acceleration due to gravity, in m/s2(= 9,806 65).7.3 Calculate separate mean values for the upper and lower sides of the specimen and for the directionsparallel and normal to the direction of manufacture or, in the case of textiles, the warp and weft directions fromthe si
34、ngle values obtained as in subclauses 7.1 and 7.2.7.4 Where applicable, evaluate the test results statistically as specified in DIN 53598-1 and DIN 53804-1.NOTE: Experience has shown that there are fairly large variations in the manufacturing machine direction (e.g.the warp) and in the cross-machine
35、 direction (e.g. the weft) within individual samples of textile fabrics andfrom sample to sample.This shall be allowed for in calculating the confidence interval, particularly in arbitration cases, to avoid arrivingat incorrect conclusions.Details relating to sampling and evaluation are to be found
36、in DIN EN 12751 and DIN 53804-1.Page 5DIN 53362 : 2003-108 Test reportThe report shall refer to this standard and include the following details:a) type and details necessary for the identification of the product under test;b) specimen conditioning;c) number of specimens;d) test atmosphere used;e) ov
37、erhanging length, with mean values reported separately as specified in subclause 7.3;f) flexural rigidity per unit area, B, reported to two significant places, with separate mean values as specifiedin subclause 7.3 and, if required, the flexural rigidity per unit width, G;g) any statistical evaluati
38、on as specified in subclause 7.4;h) any deviation from this standard;i) date of testing.Explanatory notesThis standard has been harmonized with DIN EN ISO 9073-7 by including the flexural rigidity per unit width.Other methods of determining the flexural rigidity of plastic film and coated textile fabrics, such as the Schlenkermethod, are described in DIN 53350 and DIN 53864.
