BS EN 1735-1997 Rubber- or plastics- coated fabrics Determination of flexibility《橡胶或塑料涂覆织物 挠曲性测定》.pdf

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1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1735 : 1997 The Eur

2、opean Standard EN 1735 : 1996 has the status of a British Standard ICS 59.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Rubber- or plastics- coated fabrics Determination of flexibilityBS EN 1735 : 1997 This British Standard, having been prepared under the direction of

3、 the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1997 BSI 1997 The following BSI references relate to the work on this standard: Committee reference TCI/78 Draft for comment 95/121393 DC ISBN 0 580 27197 8 Amendme

4、nts issued since publication Amd. No. Date Text affected Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee TCI/78, Coated fabrics, upon which the following bodies were represented: British Plastics Federation British Rubber

5、 Manufacturers Association Ltd. British Textile Technology Group Furniture Industry Research Association Home Office Made-up Textiles Association Ministry of Defence RAPRA Technology Ltd. SATRA Footwear Technology Centre Society of British Aerospace Companies Ltd. Society of Motor Manufacturers and

6、Traders Limited The Textile InstituteBS EN 1735 : 1997 BSI 1997 i Contents Page Committees responsible Inside front cover National foreword ii Foreword 2 Method 1 Scope 3 2 Normative references 3 3 Method 1: Flat loop method 3 4 Method 2: Bending length 4 Figures 1 Apparatus (for method 1) 4 2 Appar

7、atus (for method 2) 5ii BSI 1997 BS EN 1735 : 1997 National foreword This British Standard has been prepared by Technical Committee TCI/78, and is the English language version of EN 1735 : 1996 Rubber- or plastics-coated fabrics Determination of flexibility, published by the European Committee for S

8、tandardization (CEN). No current British Standard is superseded. Cross-references Publication referred to Corresponding British Standard EN ISO 2231 : 1995 BS EN ISO 2231 : 1995 Testing coated fabrics Part 2. Method 4. Pre-conditioning and conditioning of coated fabrics for testing purposes EN 22286

9、 : 1993 BS EN 22286 : 1994 Methods for the determination of length and width of a roll, net mass and mean mass per unit area of a piece, cut, roll or sample and the determination of thickness for coated fabrics Additional information Attention is drawn to the fact that other means of assessing the f

10、lexibility of coated fabrics are given in BS 3424 : Part 9 : 1996 (ISO 7854 : 1995) and also in BS 3356 : 1990 for measuring bending length and flexural rigidity. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a

11、front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1996 Cop

12、yright reserved to CEN members Ref. No. EN 1735 : 1996 E EUROPEAN STANDARD EN 1735 NORME EUROPE ENNE EUROPA ISCHE NORM November 1996 ICS 59.080.40 Descriptors: coated fabrics, fabrics coated with rubber, fabrics coated with plastics, tests, determination, flexibility English version Rubber- or plast

13、ics-coated fabrics Determination of flexibility Supports textiles reve tus de caoutchouc ou de plastique De termination de la souplesse Mit Gummi- oder kunststoffbeschichtete Textilien Bestimmung der Flexibilita t This European Standard was approved by CEN on 1996-09-28. CEN members are bound to com

14、ply with the CEN/CENELEC 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

15、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 CEN member into its own language and notified to the Central Secretariat has the same status as the of

16、ficial versions. CEN members 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.Page 2 EN 1735 : 1996 BSI 1997 Foreword This European Stand

17、ard has been prepared by the 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 standard, either by publication of an identical text or by endorsement, at the latest by May 1997, and c

18、onflicting national standards shall be withdrawn at the latest by May 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, I

19、celand, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 3 EN 1735 : 1996 BSI 1997 1 Scope This standard specifies two methods for determination of the flexibility of fabrics coated with rubber or plastics. Method 1 of this standard de

20、scribes the flat loop method, and method 2 describes the method of bending length. This standard does not apply to coated fabrics which, when they are cut into small pieces, tend to curl or to form a spiral, nor to those which are too rigid to form a loop. This standard is applicable: a) to the coat

21、ed fabric in the delivery state; b) to a coated fabric subjected to specified treatments. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the p

22、ublications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN ISO 2

23、231 Rubber- or plastics-coated fabrics Standard atmospheres for conditioning and testing (ISO 2231 : 1989) EN 22286 Rubber- or plastics-coated fabrics Determination of roll characteristics (ISO 2286 : 1986) 3 Method 1: Flat loop method 3.1 Principle Formation of a loop from a rectangular strip of co

24、ated fabric, placed on a horizontal plane, by superposing the two ends which are then held together under a steel bar. Measurement of the height of the loop. The flexibility is characterized by the height of the loop; this is an inverse measure, and the lower the loop height, the greater the flexibi

25、lity. 3.2 Apparatus (see figure 1) The apparatus shall consist of: 3.2.1 Flat rectangular board. The board is equipped near one of its ends with a shoulder having its face perpendicular to the board. NOTE. The dimensions shown in the figure are given as an example; they can be increased to permit th

26、e installation of several test specimens on the same board. 3.2.2 Steel bar, of stainless steel or non-corrosive steel, having a length of approximately 200 mm and a square section of approximately 20 mm side. 3.2.3 Rule, graduated in millimetres. 3.3 Atmosphere for conditioning and testing The temp

27、erature of the test pieces has a strong influence on the value of flexibility. Therefore it is necessary to condition them for at least 24 h in one of the standard atmospheres defined in EN ISO 2231 and to carry out the test in the same atmosphere. To avoid any deformation of the test specimens, the

28、y shall be placed, during conditioning, on a horizontal surface, the face that is to form the outside of the loop being turned upwards. 3.4 Test specimens 3.4.1 Shape and dimensions The test specimen shall have the shape of a rectangle, 600 mm 5 mm long and 100 mm 2m m wide. 3.4.2 Number Use three t

29、est specimens cut in the longitudinal direction and three test specimens cut in the transverse direction. 3.4.3 Sampling The test specimens shall be cut in the usable width of the roll according to EN 22286. 3.5 Procedure Powder the surface of the board (3.2.1) evenly with zinc stearate or talcum. H

30、olding the end of the test specimen between the fingers, place it on the board so that one side rests on the board and one end is against the shoulder (the choice of the side depends on the use of the product; it is subject to agreement between the interested parties; the test may also be repeated a

31、fter the test specimen has been reversed side for side). Bring the other end onto the first end (so as to form a loop), pressing it also against the shoulder. Place the steel bar (3.2.2) on the superimposed ends. Keep the test specimen in this position for 5 min 0,5 min. Measure, with the rule (3.2.

32、3), the maximum heights of the two edges of the loop for each of the test specimens with respect to the board. 3.6 Expression of results 3.6.1 For each of the two directions there are three test specimens (see 3.4.2). 3.6.2 For each test specimen cut in the longitudinal direction, express in millime

33、tres the maximum height of each of the two edges of the loop formed. Take the arithmetic mean of the six values obtained as the result for the longitudinal direction. 3.6.3 Repeat the procedure described, for test specimens cut in the transverse direction.Page 4 EN 1735 : 1996 BSI 1997 20 Shoulder T

34、est specimen Test specimen Steel bar Steel bar Shoulder 700 200 approx. Dimensions in millimetres Figure 1. Apparatus 3.7 Test report The test report shall include the following: a) reference to this standard; b) the conditioning and testing atmosphere; c) full identification of the product tested;

35、d) indication of, or reference to, the side (or sides) for which the results have been obtained; e) the individual values obtained; f) the arithmetical mean of the results for each test specimen: 1) for those cut in the longitudinal direction, on the face; 2) for those cut in the longitudinal direct

36、ion, on the back side; 3) for those cut in the transverse direction, on the face; 4) for those cut in the transverse direction, on the back side; g) whether the test was conducted on coated fabric as delivered or after it had undergone specified treatments (give details); h) any deviation, by agreem

37、ent or otherwise, from the procedure specified. 4 Method 2: Bending length 4.1 Principle A rectangular strip of coated fabric is supported on a horizontal platform. When this strip is moved on the platform, the end leaves the platform then bends down under its own weight. When the strip is sufficien

38、tly advanced, the end reaches an inclined plane. The bending length is the length of the test specimen between the edge of the platform and the point 0 of the rule. This length is given by a direct reading of the rule, when no slippage occurs. 4.2 Apparatus The essential features of the flexometer u

39、sed are shown in figure 2. 4.2.1 Horizontal platform. The horizontal platform P is treated on its upper face to ensure the easy slippage of the test specimen. 4.2.2 Graduated rule. The graduated rule S shall be rigid. (A metal rule, approximately 25 mm in width, is suitable.) The under surface of S

40、is covered with a layer of high-friction material, such as a sheet of rubber, so that when S is moved, it will carry forward the test specimens placed between the slide and the surface P .Page 5 EN 1735 : 1996 BSI 1997 S D P Figure 2. Apparatus 4.2.3 Inclined plane. The inclined plane forms an angle

41、 of 41 309 309 below the horizontal (the measurement range is governed by the size of the device). 4.3 Atmosphere for conditioning and testing The temperature of the test specimens has a strong influence on the value of flexibility. Therefore it is necessary to condition them for at least 24 h in on

42、e of the standard atmospheres defined in EN ISO 2231 and to carry out the tests in the same atmosphere. To avoid any deformation of the test specimens, they shall be placed, during conditioning, on a horizontal surface, the face that is to be upwards on the flexometer being turned upwards. 4.4 Test

43、specimens 4.4.1 Form and dimensions The test specimens shall be rectangular, 25 mm 1m m wide and of a length that allows bending length measurements. A length of 200 mm is generally sufficient. 4.4.2 Number Use 10 test specimens cut in the longitudinal direction, and 10 test specimens cut in the tra

44、nsverse direction. 4.4.3 Sampling The test specimens shall be cut within the usable width of the roll according to EN 22286. 4.5 Procedure Place the flexometer on a level table. Place the test specimen between the platform P and the slide S so that the zero of the slide and the end of the test speci

45、men are in line with the mark D. Push the slide forward so that the end of the test specimen projects beyond the inclined plane, and bends down under its own weight until it reaches the inclined plane. The test should last about 10 s. The bending length is the length of the test specimen between the

46、 edge of the platform and the point 0 of the slide. This length is given by a direct reading of the slide, when no slippage occurs. Repeat the test on the other test specimens by changing the surface in contact with the platform. 4.6 Expression of results Determine the bending lengths for longitudin

47、al and transverse directions separately and on each face. For each measurement, there are five test specimens. The result obtained is the arithmetic mean of the five measurements in centimetres.Page 6 EN 1735 : 1996 BSI 1997 4.7 Test report The test report shall include the following: a) reference t

48、o this standard; b) the conditioning and testing atmosphere; c) full identification of the product subjected to the test; d) indication of, or reference to, the side (or sides) for which the results have been obtained; e) the individual values obtained; f) the arithmetical mean of the results for ea

49、ch test specimen: 1) for those cut in the longitudinal direction, on the face; 2) for those cut in the longitudinal direction, on the back side; 3) for those cut in the transverse direction, on the face; 4) for those cut in the transverse direction, on the back side; g) whether the test was conducted on coated fabric as delivered or after it had undergone specified treatments (give details); h) any deviation, by agreement or otherwise, from the procedure specified. BSI 1997 BS EN 1735 : 1997 List of references See national foreword.BS