1、BRITISH STANDARD Textile floor coverings - Castor chair test The European Standard EN 985:2001 has the status of a British Standard ICs 59.080.60 BS EN 985:2001 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 985:2001 National foreword This British Standard, having been
2、prepared under the direction of the Sector Policy and Strategy Committee for Materiais and Chemicals, was published under the authority of the Standards Policy and Strategy Committee on 31 August 2001 This British Standard is the official English language version of EN 9852001 It supersedes BS EN 98
3、51995 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRUS, Textile floor coverings, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or propo
4、sals for change, and keep the UK interests informed; monitor related international and European developments and promulgate 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 inte
5、rnational or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to inc
6、lude 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 cover, an inside front cover, the
7、EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. IDate 1 Comments Q BSI 31 August 2001 ISBN O 580 37749 O EUROPEAN STANDARD EN 985 NORME EUR
8、OPENNE EUROPISCHE NORM July 2001 ICs 50.080.60 Supersedes EN 985:1994 English version Textile floor coverings - Castor chair test Revtements de sol textiles - Essai a lappareil roulettes Textile Bodenbelge - Stuhlrollenprufung This European Standard was approved by CEN on 2 June 2001 CEN members are
9、 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. Upto-date lists and bibliographical references concerning such national standards may be obtained on application to the
10、 Management Centre 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 Management Centre has the same status as
11、 the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy. Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATI
12、ON COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FOR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 9852001 E EN 985:2001 (E) Foreword This European Standa
13、rd has been prepared by Technical Committee CENiTC 134 “Resilient and textile floor coverings“, the secretariat of which is held by BSI. This European Standard replaces EN 985:1994. This European Standard shall be given the status of a national standard, either by publication of an identical text or
14、 by endorsement, at the latest by January 2002, and conflicting national standards shall be withdrawn at the latest by January 2002. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austr
15、ia, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. a 2 EN 985:2001 (E) 1 Scope This European Standard specifies three methods for assessing the behaviour of tex
16、tile floor coverings under the movement of a castor chair. - Test A: Assessment of the wear behaviour of textile floor coverings under the castor chair, - Test B: Assessment of the change in colour (glossing) of needled floor coverings without a pile, - Test C: Assessment of the general structural i
17、ntegrity of textile floor coverings. 2 Normative references This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriate places in the text, and the publications are listed hereafter. For dated referen
18、ces, 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 (including amendments). EN 201 39, Textiles - Standard atmos
19、pheres for conditioning and testing (IS0 139.7973). IS0 1957, Machinemade textile floor coverings - Sampling and cutting specimens for physical tests. EN 1471, Textile floor coverings -Assessment of changes in appearance. EN 12529:1998, Castors and wheels - Castors for furniture - Castors for swivel
20、 chairs - Requirements. IS0 2424, Textile floor coverings - Vocabulay. 3 Terms and definitions For the purposes of this standard the terms and definitions given in IS0 2424 apply. 4 Principle A textile floor covering is submitted for a prescribed number of cycles to the action of three castors which
21、 produce an eccentric turning motion. At the end of each test: - the change in appearance in accordance with EN 1471 is assessed after 5 O00 cycles and 25 O00 cycles (Test A); - the change in colour by means of grey scales is assessed after 750 cycles (Test B); - the extent of deterioration of the s
22、pecimen is assessed after 10 O00 or 25 O00 cycles (Test C). 5 Test apparatus (Figure 1) 5.1 Circular, rotating testing platform, of diameter (800 15) mm on which the specimen support plate is mounted. The rotation speed of the testing platform shall be (19 I 1) r/min and the direction of rotation sh
23、all reverse at (180 5 20) s intervals. The stop time between reversals shall be (5 I 1) s. 3 EN 985:2001 (E) 5.2 Castor assembly, comprising a vertical shaft set in a bearing and a plate, R, on which the castors are mounted. This castor assembly is offset at a distance of (198 f 1) mm from the centr
24、e of the testing platform. The three castors (5.3) are arranged concentrically at 120“ intervals around the centre of the plate and at a distance of (130 f 1) mm from the centre of the plate. They are free to rotate so that they follow the rotation of the castor assembly. The rotation speed of the c
25、astor assembly shall be (50 f 1) rimin. The castor assembly when loaded has a mass of (90 k 1) kg that is divided equally over the three castors. The distance under load between the castor assembly plate R and the loadldrive plate C (castor plate clearance) shall be more than 3 mm at the point of me
26、asurement (see Figure 1). NOTE 1 The area of stress produced on the test specimen is detemined by the distance between the axes of revolution of the castor chair assembly and of the testing platforni and also by the distance of the castors from the centre of the plate. The stressed area is approxima
27、tely 0,3 m2 NOTE 2 The relationship between the rotation speed of the testing platform and that of the castor assembly causes a sharp reverse movement of the castors near the edges of the stressed area. 5.3 Castor Set, comprising three castors as illustrated in Figure 2 with the following dimensions
28、: diameter of castors (50 f 2) mm width of castors : (20 I 2) mm radius of curvature of castor tread: (130 L 5) mm crank distance: (32f 2)mm The distance between any two castor mountings shall be (225 15) mm. The castors shall be Type H in accordance with EN 12529:1998. The castor treads shall be ma
29、de from polyamide having hardness between 90 and 100 Shore scale A units and shall be replaced after every 2 million cycles of the testing platform, or earlier if necessary. 5.4 Lifting device, to raise the castor assembly above the testing platorm when the apparatus is stationary. 5.5 Cycle counter
30、, for setting the number of cycles of the testing platform. 5.6 Suction device, with a flow rate of 25 to 30 lis mounted over the entire width of the stressed part of the specimen, the height of this device being adjustable. 5.7 Specimen support, comprising a circular sheet of rigid plastic (e.g. po
31、lymethylmethacryiate) of (7 k 2) mm thickness and diameter (800 f 5) mm. The support is placed on the testing platform with the holes in the support locating on studs on the testing platform to prevent slippage. 5.8 Metal clamping ring, of height (IO I 2) mm, external diameter (700 f 5) mm and inter
32、nal diameter (680 I 5) mm, to hold loose laid tiles, or carpet over an underlay, in position during the test. 5.9 Brush vacuum cleaner, with rotating brush, driven by an independent motor. 6 Sampling and preparation of specimens 6.1 Sample the material to be tested according to IS0 1957. 6.2 Prepare
33、 the specimens as follows. 6.2.1 Test A Cut either three semicircles or six quadrants of radius (350 k 3) mm ensuring that the edges are parallel to andior at right angles to the direction of manufacture. Cut also a reference specimen with dimensions of 4 EN 985:ZOOl (E) (200 f 2) mm x (200 his Brit
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