1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 1734 : 1997 The Eur
2、opean Standard EN 1734 : 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 resistance to water penetration Low-pressure methodBS EN 1734 : 1997 This British Standard, hav
3、ing been prepared under the direction of 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
4、 95/121356 DC ISBN 0 580 27192 7 Amendments 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: Br
5、itish Plastics Federation British Rubber 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
6、Ltd. Society of Motor Manufacturers and Traders Limited The Textile InstituteBS EN 1734 : 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 Principle 3 4 Apparatus 3 5 Test specimens 3 6 Procedure 4 7 E
7、xpression of results 4 8 Test report 4ii BSI 1997 BS EN 1734 : 1997 National foreword This British Standard has been prepared by Technical Committee TCI/78, and is the English language version of EN 1734 : 1996 Rubber- or plastics-coated fabrics Determination of resistance to water penetration Low-p
8、ressure method, published by the European Committee for Standardization (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 No current British Standard is superseded.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 con
9、ditioning of coated fabrics for testing purposes EN 22286 : 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
10、 is drawn to the fact that other means of assessing the hydrostatic resistance properties of coated fabrics are given in BS 3424 : Part 26 : 1990 and ISO 1420 : 1987. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprise
11、s a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 4 , 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 199
12、6 Copyright reserved to CEN members Ref. No. EN 1734 : 1996 E EUROPEAN STANDARD EN 1734 NORME EUROPE ENNE EUROPA ISCHE NORM November 1996 ICS 59.080.40 Descriptors: coated fabrics, fabrics coated with rubber, fabrics coated with plastics, watertightness, fluid-tightness tests, pressure tests, hydros
13、tatic tests English version Rubber- or plastics-coated fabrics Determination of resistance to water penetration Low-pressure method Supports textiles reve tus de caoutchouc ou de plastique De termination de la re sistance a l a pe ne tration de leau Me thode a basse pression Mit Gumi- oder kunststof
14、fbeschichtete Textilien Bestimmung der Wasserdichtheit Verfahren bei geringem Druck This European Standard was approved by CEN on 1996-09-28. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a nat
15、ional 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 member. This European Standard exists in three official versions (English, French, German). A version in a
16、ny 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 official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ice
17、land, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 1734 : 1996 BSI 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. T
18、his 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 conflicting national standards shall be withdrawn at the latest by May 1997. According to the CEN/CENELEC Internal Regulations, the nat
19、ional standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.Page 3 EN 1734 :
20、1996 BSI 1997 1 Scope This standard specifies a method for the determination of the resistance of rubber- or plastics-coated fabrics to water penetration (hydrostatic resistance) when subjected to a specific hydrostatic pressure over a fixed period of time. Two test specimen sizes are given; one is
21、circular, the other square. 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 publications are listed hereafter. For dated references, subseq
22、uent 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 2231 Rubber- or plastics-coated fabrics Standard atmospheres fo
23、r conditioning and testing (ISO 2231 : 1989) EN 22286 Rubber- or plastics-coated fabrics Determination of roll characteristics (ISO 2286 : 1986) 3 Principle A test specimen of coated fabric is subjected to an increasing pressure of water on one face, under standard conditions, until a predetermined
24、pressure specified in the coated fabric specification is obtained. The required pressure is maintained for a specified time or until penetration occurs, whichever is the sooner. 4 Apparatus 4.1 General The apparatus consists of a well, fitted with a clamp to fasten the test specimen over the well. T
25、he well has a nozzle on its lower part, allowing it to be connected to a water inlet pipe so as to fill it at room temperature. A restraining mesh is fitted over the test specimen. This mesh comprises wires of 1 mm up to 1,2 mm diameter to form squares of not greater than 30 mm side. 4.2 Means of me
26、asuring water pressure Either a manometer connected to the testing head, allowing water pressure up to 19,6 kPa (200 cmH 2 O) to be read to an accuracy of 1%, or a pressure gauge, graduated in centimetres head of water, or in kilopascals with a maximum reading of at least 100 kPa (946 cmH 2 O), is u
27、sed as the means of measuring the water pressure applied to the test specimen. 4.3 Test specimen area The open part of the well (4.1) over which the test specimen is clamped shall be either a square having a side of 100 mm (100 cm 2 ) or a circle of 113 mm diameter (100 cm 2 ). If necessary, soft ru
28、bber sealing gaskets can be employed between the coated fabric test specimen and the surfaces of the clamps in order to reduce the risk of damage to the test specimen by the clamps, and to facilitate the testing of seams. In this respect, rubber having a hardness of approximately 40 IRHD (Internatio
29、nal Rubber Hardness Degree) and approximately 1 cm thick or 1 cm in diameter has been found useful. Alternatively, a closed-cell, cross-linked polyethylene foam having a density of 45 kg/m 3 to 55 kg/m 3 and approximately 1 cm thick has also been used. 5 Test specimens 5.1 Conditioning Immediately p
30、rior to testing, condition the test specimens for at least 16 h in an appropriate atmosphere in accordance with EN ISO 2231. 5.2 Sampling Test specimens shall be taken from an area with no functional or visible defects and shall be located in the usable width of the coated fabric as defined in EN 22
31、286. 5.3 Number of test specimens Unless otherwise specified in the material specification, five test specimens shall be tested for each series of tests. 5.4 Shape and dimensions 5.4.1 Square Each test specimen shall be a square with sides measuring approximately 200 mm. 5.4.2 Circular Each test spe
32、cimen shall have a diameter of 130 mm to 200 mm.Page 4 EN 1734 : 1996 BSI 1997 6 Procedure 6.1 Test method With the vessel connected to the water inlet pipe, open the inlet valve and allow the water to run until it overflows. Check that the vessel is horizontal by ensuring that the water is uniforml
33、y flush with all four edges. The open part of the well may be circular. Ensure that the inlet pipe is totally purged of air, and also that the level of water in the vessel corresponds to the zero on the manometer tube. Place the test specimen on the vessel with the face to be tested, moistened prior
34、 to the test, in contact with the water, without trapping any air under the test specimen. Fit the retaining mesh (see 4.1). Secure the test specimen and the mesh firmly on the vessel using the clamp, taking care to ensure that the edges of the clamp are completely parallel with those of the vessel.
35、 6.2 Application of pressure Open the inlet valve so that the pressure gradually increases in the vessel at an approximate rate of 1 m per 3 min. The pressure shall be verified using either a manometer or a pressure gauge (see 4.2). Once the required pressure has been reached, control the inlet valv
36、e, if necessary, and maintain the pressure for the required time (3 min to 5 min). Then inspect the visible part of the test specimen in order to detect whether any water droplets have passed through the coated fabric. Close the vessel inlet valve and return the pressure to zero by opening the evacu
37、ation valve. If a leak is detected in the test specimen clamping zone during the test, begin again. 7 Expression of results The visible face of the coated fabric shall not have any water penetration points nor any trace of moisture, on any of the five test specimens. A water penetration point is con
38、sidered to be any spot in which a drop appears as a pin prick and grows to reach a diameter of 1 mm to 1,5 mm. Penetration occurring exactly on the edges of the clamp shall not be considered to be a water penetration point. 8 Test report The test report shall include the following: a) the date of th
39、e test; b) reference to this standard; c) the description of the coated fabric; d) the conditioning and testing atmosphere used; e) the number of test specimens used; f) whether the test specimens were square or circular; g) which side(s) of the coated fabric were subjected to water pressure; h) the
40、 pressure level and the time applied; i) whether any leakage occurred and at what time interval; j) if applicable, the specific conditions used for ageing or other testing; k) details of any deviations from the standard test procedure. BSI 1997 BS EN 1734 : 1997 List of references See national forew
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