1、:.EN EN*bbb 74 3404587 0087739 T4b BRITISH STANDARD Resilient floor coverings - BS EN Determination of gelling The European Standard EN 666 : 1994 has the status of a British Standard 666 : 1995 CEN EN*bbb 94 I 3404589 0087827 LO5 M BS EN 666: 1995 Amd. No. Date Cooperating organizations Text affect
2、ed The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Italy Luxembourg Netherlands Norway Portu
3、gal Spain Sweden Switzerland United Kingdom Oesterreichisches Normungsinstitut Institut belge de normalisation Dansk Standard Suomen Standardisoimisliito, r. y. Association franaise de normalisation Deutsches Institut fr Normung e. V. Hellenic Organization for Standardization lchnological Institute
4、of Iceland National Standards Authority of Ireland Ente Nazionale Italiano di Unificazione Inspection du Travail et des Mines Nederlands Normalisatie-instituut Norges Standardiseringsforbund Instituto Portugus da Qualidade Asociacin Espaola de Normalizacin y Certificacin Standardiseringskommissionen
5、 i Sverige Association suisse de normalisation British Standards Institution This British Standard, having been prepared under the direction of the Materials and Chemicals Sector Board (U-), was published under the authority of the Standards Board and comes into effect on 15 February 1995 O BSI 1995
6、 The following BSI references relate to the work on this standard: Committee reference PRI/GO Draft for comment 92138640 DC ISBN O 680 23248 4 CEN ENabbb 9Y 3404589 0087828 041 BS EN 666 : 1995 National foreword This British Standard has been prepared by %chnical Committee PRI/6O, Resilient floor co
7、verings, and is the English language version of EN 666 : 1994 Resilient floor coverings - Determination of gelling, published by the European Committee for Standardization (CEN). Compliance with a British Standard does not of itself confer immunity from legal obligations. i CEN ENxbbb 94 3404589 cm8
8、7830 7TT EUROPEAN STANDARD EN 666 NORME EUROPENNE EUROPISCHE NORM November 1994 ICs 91.180 Descripton: Floor coverings, tests, immersion tests, solvents, determination, gelation English version Resilient floor coverings - Determination of gelling Revtements de sol rsilients - Dtermination de la glif
9、ication Geilierung Elastische Bodenbelge - Bestimmung der This European Standard was approved by CEN on 1994-11-10. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any
10、 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 any other language made by
11、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. GEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Gemany, Greece, Iceland, Ireland, Italy, Luxem
12、bourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 0 1994 Copyright reserved to CEN members Ref. No. EN
13、666 : 1994 E CEN EN*bbb 94 3404589 0087831 636 Page 2 EN 66 : 1994 Foreword This European Standard has been prepared by %chnical Committee CEN/E 134, Resilient and textile floor coverings, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standar
14、d, either by publication of an identical text or by endorsement, at the latest by May 1995, and conflicting national standards shall be withdrawn at the latest by May 1995. According to the Internal Regulations CENKENELEC, the following countries are bound to implement this European Standard: Austri
15、a, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. CEN EN*bbb 94 = 3404589 O087832 572 1 Scope This European Standard specifies a method for determining the degree of gelling of a poyl
16、vinyl chloride floor covering. It is primarily intended for production control purposes. 2 Principle The degree of gelling is indirectly assessed, by immersing in a solvent test pieces which have been previously bent to accentuate any break-up due to swelling resulting from the intermolecular penetr
17、ation of the solvent. The test pieces are then examined for changes in the structure of the wear layer. NmE. Gelling is complete when the coating has been fully cured by thermal treatment to achieve its full properties. This state is achieved when the structure is uniform throughout and no particles
18、 of resin incompletely dissolved in the plasticizers are visible within it. 3 Apparatus and materials 3.1 A glass tank I 50 mm deep, with a lipped lid. 3.2 Steel wire hangers, 3 mm to 5 mm in diameter. 3.3 Clips, e.g. screw clips, mbber-tube clips, artery clips. 3.4 Acetone, purity 1 99 %. 3.5 Oven,
19、 capable of being maintained at (30 f 1) OC. 4 Sampling and preparation of test pieces lke a representative sample from the available material, i.e. six pieces of complete material of area 5000 mm2 to 10 O00 mm2. Place the pieces of complete material in an oven for 15 min at 3OOC. Cut out one test p
20、iece of minimum dimensions 70 mm x 20 mm from each piece of complete material, ensuring that the edges are clean cut. 5 Conditioning Condition the test pieces at a temperature of (23 I 2) OC and relative humidity of (50 I 5) % for a minimum for 24 h. Maintain these conditions when carrying out the t
21、est. Page 3 EN 666 : 1994 6 Procedure Fold the test pieces over, wear layer outwards, to form loops, the ends being held against each other over a length of 4 mm to 5 mm by a clip. Check the test pieces for damage, particularly in the curved area. Slip the looped test- pieces onto the hangers and fu
22、lly immerse in acetone taking care that the test pieces do not come into contact with each other. NmE. Different materials should not be tested together. Fresh acetone shall be used for each test. After 30 min immersion, remove the hangers from the tank and examine the test pieces one at a time with
23、 the naked eye, paying particular attention to the curved area. Examine them again after 2 h drying still held together by the clip. 7 Expression of results In assessing gelling, the following factors shall not be taken into account: a) swelling and hardening of the test pieces; b) changes affecting
24、 layers other than the wear layer; c) detachment of the layer from the other layers. Express any major or minor changes affecting the structure of the wear layer as follows: 1) superficial cracking; 2) splits throughout the thickness; 3) separation, i.e. flakes still clinging to the surface but part
25、ially detached; 4) flaking, i.e. loss of clearly defined fragments; 5) pitting, i.e. wear layer pitted, in spots or ail over. 8 Test report The test report shall include the following information: a) a reference to this standard, i.e. EN 666; b) a complete identification of the product tested, inclu
26、ding type, source and manufacturers reference numbers; c) the previous history of the sample; d) any major or minor changes affecting the structure of the wear layer as described in clause 7; e) any deviation from this standard which may have affected the results. CEN EN*bbb 94 3404589 0087833 409 m
27、 BS EN 666 : 1995 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted to Technical Committee PRI/GO, Resilient floor coverings, upon which the following bodies were represented: British Adhesives and Seala
28、nts Association British Floor Coverings Manufacturers Association British Railways Board British Rubber Manufacturers Association Ltd. Consumer Policy Committee of BSI Contract Flooring Association Cork Industry Federation Department of the Environment (British Board of Agrment) Department of the En
29、vironment (Building Research Establishment) Federation of Plastering and Drywall Contractors Institute of Chartered Arbitrators Royal Institute of British Architects Wood Panel Products Federation Coopted members CEN EN*bbb 94 H 3404589 0087834 345 BS EN 666 : 1995 BSI 389 Chiswick High Road London
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