1、BRITISH STANDARD BS EN 666:1995 Resilient floor coverings Determination of gelling The European Standard EN666:1994 has the status of a BritishStandardBSEN666:1995 This BritishStandard, having been prepared under the directionof the Materials and Chemicals Sector Board (I/-), waspublished under the
2、authorityof the Standards Boardand comes into effect on 15February1995 BSI 01-2000 The following BSI references relate to the work on this standard: Committee referencePRI/60 Draft for comment92/38640DC ISBN 0 580 23248 4 Cooperating organizations The European Committee for Standardization (CEN), un
3、der whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standard Finland Suomen Standardisoimisliito, r.y. France Association
4、 franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mine
5、s Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom BritishSt
6、andards Institution Amendments issued since publication Amd. No. Date CommentsBSEN666:1995 BSI 01-2000 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN666 3 National annex NA (informative) Committees responsible Inside back coverBSEN666:1995 ii
7、BSI 01-2000 National foreword This BritishStandard has been prepared by Technical CommitteePRI/60, Resilient floor coverings, and is the English language version of EN666:1994 Resilient floor coverings Determination of gelling, published by the European Committee for Standardization (CEN). A British
8、 Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front c
9、over, an inside front cover, pagesi andii, theEN title page, pages2 to4, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORM
10、E EUROPENNE EUROPISCHE NORM EN 666 November1994 ICS 91.180 Descriptors: Floor coverings, tests, immersion tests, solvents, determination, gelation English version Resilient floor coverings Determination of gelling Revtements de sol rsilients Dtermination de la glification Elastische Bodenbelge Besti
11、mmung der Geilierung This European Standard was approved by CEN on1994-11-10. 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 national standard without any alteration. Up-to-date lists and bibl
12、iographical 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 translation under the responsibility o
13、f 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, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
14、 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 1994 Copyright reserved to CEN members Ref. No. EN 666:1994EEN666:1994 2 BSI 01-2000 Forew
15、ord This European Standard has been prepared by Technical Committee CEN/TC134, Resilient and textile floor coverings, 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
16、 latest by May1995, and conflicting national standards shall be withdrawn at the latest by May1995. According to the Internal Regulations CEN/CENELEC, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland,
17、 Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Principle 3 3 Apparatus and materials 3 4 Sampling and preparation of test pieces 3 5 Conditioning 3 6 Procedure 3 7 Expression of results 3 8 Test report 3EN666:1994 B
18、SI 01-2000 3 1 Scope This European Standard specifies a method for determining the degree of gelling of a polyvinyl 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
19、 have been previously bent to accentuate any break-up due to swelling resulting from the intermolecular penetration of the solvent. The test pieces are then examined for changes in the structure of the wear layer. NOTEGelling is complete when the coating has been fully cured by thermal treatment to
20、achieve its full properties. This state is achieved when the structure is uniform throughout and no particles of resin incompletely dissolved in the plasticizers are visible within it. 3 Apparatus and materials 3.1 A glass tankU 50mm deep, with a lipped lid. 3.2 Steel wire hangers, 3mm to5mm in diam
21、eter. 3.3 Clips, e.g.screw clips, rubber-tube clips, artery clips. 3.4 Acetone, purityU 99%. 3.5 Oven, capable of being maintained at(30 1) C. 4 Sampling and preparation of test pieces Take a representative sample from the available material, i.e.six pieces of complete material of area5000mm 2to1000
22、0mm 2 . Place the pieces of complete material in an oven for15min at30 C. Cut out one test piece of minimum dimensions70mm 20mm from each piece of complete material, ensuring that the edges are clean cut. 5 Conditioning Condition the test pieces at a temperature of(23 2) C and relative humidity of(5
23、0 5)% for a minimum for24h. Maintain these conditions when carrying out the test. 6 Procedure Fold the test pieces over, wear layer outwards, to form loops, the ends being held against each other over a length of4mm to5mm by a clip. Check the test pieces for damage, particularly in the curved area.
24、Slip the looped test pieces onto the hangers and fully immerse in acetone taking care that the test pieces do not come into contact with each other. NOTEDifferent materials should not be tested together. Fresh acetone shall be used for each test. After30min immersion, remove the hangers from the tan
25、k and examine the test pieces one at a time with the naked eye, paying particular attention to the curved area. Examine them again after2h 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 hard
26、ening of the test pieces; b) changes affecting 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.
27、flakes still clinging to the surface but partially detached; 4) flaking, i.e.loss of clearly defined fragments; 5) pitting, i.e.wear layer pitted, in spots or all over. 8 Test report The test report shall include the following information: a) a reference to this standard, i.e.EN666; b) a complete id
28、entification of the product tested, including 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 clause7; e) any deviation from this standard which may have affected the resu
29、lts.4 blankBSEN666:1995 BSI 01-2000 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted to Technical CommitteePRI/60, Resilient floor coverings, upon which the following bodies were represented: British Ad
30、hesives and Sealants 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) Dep
31、artment of the Environment (Building Research Establishment) Federation of Plastering and Drywall Contractors Institute of Chartered Arbitrators Royal Institute of British Architects Wood Panel Products Federation Coopted membersBS EN 666:1995 BSI 389 Chiswick High Road London W4 4AL BSIBritishStand
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