1、Wallcoverings in roll form Determination of dimensions, straightness, spongeability and washability The European Standard EN 12956: 1999, including amendment Al :2001, has the status of a British Standard ICs 91.180 BS EN 12956:1999 Incovorating Amendment No. I British Standards NO COPYING WITHOUT B
2、SI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 12956:1999 13613 National foreword This British Standard is the official English language version of EN 12956: 1999, including amendment A1:2001. The UKparticipation in its preparation was entrusted to Technical Committee CW/35, Wallcoverings,
3、 which has the responsibility to: - - aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promul
4、gate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section ent
5、itled “International Standards Correspondence Index”, or by using the “Search” facility of the BSIElectronic Catalogue or of British Stan dards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application. Compli
6、ance with a British Standard does not ofitself confer immunity from legal obligations. 3 1 July 2002 Revision of 6. 2. 2 This British Standard. having - been prepared under the direction of the Consumer Products and Services Sector Summary of pages This document comprises a front cover, an inside fr
7、ont cover, the EN title page, Policyand Strategycommittee, was published under the authoritv of the Standards The BSI copyright date displayed in this document indicates when the pages 2 to 11 and a back cover. Policy and Strategy Committee on 15 September 1999 document was last issued. Amendments i
8、ssued since publication Amd.No. I Date I Comments O BSI 3 1 July 2002 ISBN O 580 32585 7 EUROPEAN STANDARD EN 12956 NORME EUROPENNE EUROPISCHE NORM May 1999 +Al 200 1 ICs 91.180 English ver sion Wallcoverings in roll form - Determination of dimensions, straightness, spongeability and washability (in
9、cludes amendment Al :200 1) Revtements muraux en rouleaux Dtemination des dimensions, de la rectitude, de lpongeabilit et de la lavabilit Abwaschbarlteit (inclut 1 amendment A1:2001) Wandbeldeidungen in Rollen Bestimmung der Mae, Geradheit, Wasserbestndiglteit und (enthlt nderung Al :2001) This Euro
10、pean Standard was approved by CEN on 18 April 1999. Amendment Al was approved by CEN on 20 October 200 1. CEN members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration
11、. Up-to-date lists and bibliographical references conceining 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 any other language made by translation
12、 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
13、 Luxembourg, Netherlands, Noiway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fiu- Noi-mung Central Secretariat: rue de Stassart, 36 B-1050 Brussels O 1999 CEN All rights of exploitation in any
14、 form and by any means reserved worldwide for CEN national Members Ref. No. EN 12956:1999 + A1:2001 E Page 2 EN 12956: 1999 Contents Foreword 1 Scope 2 Normative references 3 Definitions 4 Method of measuring dimensions 5 Method of verifying straightness 6 Method of assessing spongeability and washa
15、bility 7 Test report Page 2 3 3 3 3 4 5 10 Foreword This European Standard has been prepared by Technical Committee CEN/TC 99, Wallcoverings, 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 o
16、r by endorsement, at the latest by November 1999, and conflicting national standards shall be withdrawn at the latest by November 1999. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Aus
17、tria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noiway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. This European Standard will supersede the annexes of European Standard EN 233: 1989. The fiial edition of E
18、N 233 will contain only specifications. Foreword to amendment Al This amendment EN 12956: 1999/A1:2001 to the EN 12956: 1999 has been prepared by Technical Committee CEN/TC 99, Wallcoverings, the Secretariat of which is held by BSI. This amendment to the European Standard EN 12956: 1999 shall be giv
19、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2002, and conflicting national standards shall be withdrawn at the latest by June 2002. According to the CENKENELEC Internal Regulations, the national standards organizations of
20、the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Noiway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 3 1 July 2002 Page 3 EN 129
21、56: 1999 1 Scope This standard specifies: a method for measuring dimensions; a method for verif$ng straightness; a method for assessing spongeability and washability. It is applicable to all wallcoverings in roll foi-m, except cork wallcoverings. 2 Normative references This standard incorporates by
22、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, subsequent amendments to or revisions of any of these publications apply to this standard only w
23、hen incorporated in it by amendment or revision. For undated references the latest edition of the publication refeed to applies. EN 233, Wallcoverings in roll form Specifications for finished wallyapers, wall vinyls and plastics wallcoverings. EN 235, Wallcoverings Vocabulary and symbols. prEN 259-1
24、, Wallcoverings in roll form Heavy duty wallcoverings Part 1: Specifications. IS0 187, Paper, board andpulys Standard atmosphere for conditioning and testing and procedure for monitoring the atmosphere and conditioning of samples. IS0 565, Test sieves Metal wire cloth, perforated metal plate and ele
25、ctroformed sheet Nominal sizes of openings . IS0 1923, Cellular plastics and rubbers Determination of linear dimensions. IS0 2439, Flexible cellularpolymeric materials Determination of hardness (indentation technique). 3 Definitions For the purposes of this European Standard, the defiiitions given i
26、n EN 235 apply. 4 Method of measuring dimensions 4.1 Apparatus 4.1.1 Width 4.1.1.1 Suitable steel rule, calibrated in millimetres accurate to f0,5 mm or any other equivalent precision device. 4.1.1.2 Rectangular template, (32 f 0,5) mm x (300 f 0,5) mm for categoiy 3 wallcoverings in accordance with
27、 EN 233. O BSI 3 1 July 2002 Page 4 EN 12956: 1999 4.1.2 Length Suitable tape calibrated in centimetres accurate to f0,5 cm per 20 m or any other equivalent precision device. 4.2 Preparation Samples shall be conditioned in accordance with IS0 187. Measurements shall be made on each roll selected for
28、 sampling in accordance with the wallcovering requirements, in particular the normative annexes of EN 233 and prEN 259-1. NOTE The measurement of very large rolls of heavy duty wallcoverings may be difficult to perform under the conditions of IS0 187 but should be undertaken as soon as practicable a
29、fter such conditioning. 4.3 Procedures 4.3.1 Width For wallcoverings of categories 1 and 2 defined in EN 233 and for other wallcoverings in roll foi-m, measure the width perpendicular to the length of the roll at at least three points on the roll which are at least 1 m apart. State the width as the
30、arithmetic mean of these measurements to the nearest millimetre. For friezes (in accordance with categoi-y 3 defiied in EN 233), place the template (see 4.1.1) on the frieze and ti-y to inscribe it entirely within the latter. If this is possible, the width of the frieze shall be considered to be not
31、 less than 32 mm, if not, the width shall be considered to be less than 32 mm. 4.3.2 Length Measure the length on one side of the roll after ensuring that the roll ends are cut at right angles. State the length to the nearest centimetre. 5 Method of verifying straightness 5.1 Apparatus 5.1.1 Steel r
32、ule, at least 1 m long with a straightness accuracy of at least 0,04 mm over a length of 1 m. 5.1.2 Shim, 1 mm thick accurate to 0,l mm. 5.2 Test pieces From the sample, tale a test piece 2,50 m long. 5.3 Procedure Lay out the test piece over a flat surface. Malte three marks 1 m apart on one edge o
33、f the test piece. Line up the ide with two of the marks. Check whether the distance between the edge of the test piece and the ide is greater than the thickness of the shim by sliding it along the ide. Repeat the operation with the third marlt. If the two measurements give a distance of less than th
34、e thickness of the shim, record the result as: distance less than 1 mm. Otheiwise, record the result as: distance greater than 1 mm. O BSI 3 1 July 2002 Page 5 EN 12956: 1999 Nominal aperture size (in accordance with IS0 565) of sieve, pm 125 90 63 6 Method of assessing spongeability and washability
35、 Percentage retained Y mass) nil O to 15 240 6.1 Principle Secure a test piece taken from the wallcovering to a horizontal surface and, after applying a reagent, rub it mechanically. Then examine the test piece for damage. 6.2 Reagents 6.2.1 Spongeability distilled or deionized water at the ambient
36、temperature of the laboratory. 6.2.2 Washability or extra-washability solution of soft soap in distilled or deionized water with a mass fraction of 2 YO at the ambient temperature of the laboratory. The soap shall be made by the reaction of potassium or sodium hydroxide with a vegetable oil or oils
37、or with fatty acids derived fom them yielding not less than 32 YO of fatty acids. The soap shall be jelly-like in texture. 6.2.3 Scrubbability abrasive paste comprising 75 % by mass of a white aluminium oxide abrasive powder with particle size as given in Table 1 ) and 25 % of soap solution (6.2.2).
38、 6.3 Apparatus 6.3.1 Base machine (see Figure 1) The base machine shall include the following characteristics. a) A flat glass platen mounted in the horizontal plane with a framework for clamping on a 300 mm long x 150 mm wide test piece of wallcovering, retaining the reagent placed on the test piec
39、e and preventing the ingress of reagent under the test piece. b) A motor-driven aim on which a rubbing head, with its bottom face resting on the platen, is pivoted. The machine has an automatic stop mechanism which can be pre-set to stop the aim on completion of the required number of cycles. c) The
40、 aim reciprocates the rubbing head on a straight course along the length of the test piece with sinusoidal displacement against time. The length of the stroke shall be (140 f 1) mm and the aim shall capable of being set to reciprocate at two speeds (30 f 3) cycledmin or (120 f 10) cycles/min. d) The
41、 rubbing head is attached to the aim by a parallelogram linkage to allow fee vertical movement of the head whilst maintaining its worlung surface in a horizontal plane. ) The sieving specification is termed Grit No. 180 by the Federation of European Producers of Abrasives. O BSI 3 1 July 2002 Page 6
42、 EN 12956: 1999 2 6 5 Legend 1 Rubbing head 2 Reciprocating arm and pivot 3 Parallelogram linkage 4 5 Framework 6 Testpiece 7 Platen Rubbing material end clamped to bottom face of rubbing head Figure 1 - Diagram illustrating the mechanism of the spongeability and washability test apparatus O BSI 3 1
43、 July 2002 Page 7 EN 12956: 1999 6.3.2 Rubbing heads The following i-ubbing heads are required a) For spongeability: A head with a bottom face 50 mm long and 29 mm wide to which a sponge is secured by end clamps. The total mass of the head with the dry sponge attached, two of the four aims of the pa
44、rallelogram and their attachment systems to the head shall be (100 f 5) g (see Figure 1). The sponge is cut fom polyether foam open cell iil-egular sti-ucture sheet of apparent density (22 f 1) icg/m3, of hardness (20,5 f 2,5) N when measured in accordance with IS0 2439, method C, in an atmosphere o
45、f (20 f 2) “C and (65 f 5) % relative humidity and of thickness (6;) mm in accordance with IS0 1923. The sponge is (29 f 1) mm wide and of a length sufficient to be laid along the 50 mm length of the bottom face of the head and secured by clamps. b) For washability and extra-washability: A head with
46、 a bottom face 50 mm long and 29 mm wide to which a strip of felt is secured by end clamps. The total mass of the head with the dry felt attached, two of the four aims of the parallelogram and their attachment systems shall be (550 f 10) g (see Figure 1). The strip of felt is cut fom white packaging
47、 felt sheet with a composition of at least 97 YO wool fibre quality OS, a density of 180 g/dm3 f 15 %, a thickness of 6 mm f 20 % and the following chemical grade of purity: pH value of aqueous extract: 5 to 8; chlorine content, calculated as NaC1: 0,05 % max.; sulfate content, calculated as Na2S04:
48、 0,25 % max.; amount of matter soluble in toluene/methanol (other than matter dei-ived fom proofmg agents): 5,O % max.; amount of matter soluble in water after removal of matter soluble in toluene/methanol: 3,O YO max.; ash (other than the ash of proofing agents): 3,5 % max. The strips shall be (29
49、f 1) mm wide and of length sufficient to be laid along the 50 cm length of the bottom face of the head and secured by the clamps. c) For sci-ubbability: A head with a bi-ush secured to the bottom face. The total mass of the head with the bi-ush attached which bears on the test piece shall be (600 f 10) g (see Figure 2). The bi-ush has polyamide 6.6 bristles (0,33 f 0,025) mm in diameter ail-anged in 55 hifts each of (23 f 2) bristles and (12 f 1) mm long (see details in Figure 3). NOTE When not in use, the brush shou
