SIST EN 985:2001

SLOVENSKI STANDARD
SIST EN 985:2001
01-december-2001
1DGRPHãþD
SIST EN 985:1999
Tekstilne talne obloge - Preskus s stolom na kolescih
Textile floor coverings - Castor chair test
Textile Bodenbeläge - Stuhlrollenprüfung
Revetements de sol textiles - Essai a l'appareil a roulettes
Ta slovenski standard je istoveten z: EN 985:2001
ICS:
59.080.60 Tekstilne talne obloge Textile floor coverings
SIST EN 985:2001 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 985:2001

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SIST EN 985:2001
EUROPEAN STANDARD
EN 985
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2001
ICS 50.080.60 Supersedes EN 985:1994
English version
Textile floor coverings - Castor chair test
Revêtements de sol textiles - Essai à l'appareil à roulettes Textile Bodenbeläge - Stuhlrollenprüfung
This European Standard was approved by CEN on 2 June 2001.
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 bibliographical references concerning such national
standards may be obtained on application to the 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 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, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 985:2001 E
worldwide for CEN national Members.

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SIST EN 985:2001
EN 985:2001 (E)
Foreword
This European Standard has been prepared by Technical Committee CEN/TC 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 by endorsement, at the latest by January 2002, and conflicting national standards shall be withdrawn
at the latest by January 2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,
Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal,
Spain, Sweden, Switzerland and the United Kingdom.
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SIST EN 985:2001
EN 985:2001 (E)
1 Scope
This European Standard specifies three methods for assessing the behaviour of textile 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 integrity 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 references, 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 20139, Textiles — Standard atmospheres for conditioning and testing (ISO 139:1973).
ISO 1957, Machine-made 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 chairs — Requirements.
ISO 2424, Textile floor coverings – Vocabulary.
3 Terms and definitions
For the purposes of this standard the terms and definitions given in ISO 2424 apply.
4 Principle
A textile floor covering is submitted for a prescribed number of cycles to the action of three castors which
produce an eccentric turning motion.
At the end of each test:
 - the change in appearance in accordance with EN 1471 is assessed after 5 000 cycles and 25 000 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 specimen is assessed after 10 000 or 25 000 cycles
(Test C).
5 Test apparatus (Figure 1)
5.1 Circular, rotating testing platform, of diameter (800 ± 5) mm on which the specimen support plate is
mounted. The rotation speed of the testing platform shall be (19 ± 1) r/min and the direction of rotation shall
reverse at (180 + 20) s intervals. The stop time between reversals shall be (5 ± 1) s.
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SIST EN 985:2001
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 ± 1) mm from the centre 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 ± 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 castor assembly shall be (50 ± 1) r/min.
The castor assembly when loaded has a mass of (90 ± 1) kg that is divided equally over the three castors.
The distance under load between the castor assembly plate R and the load/drive plate C (castor plate clearance)
shall be more than 3 mm at the point of measurement (see Figure 1).
NOTE 1 The area of stress produced on the test specimen is determined by the distance between the axes of revolution of
the castor chair assembly and of the testing platform and also by the distance of the castors from the centre of the plate. The
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stressed area is approximately 0,3 m
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:
diameter of castors (50  2) mm
width of castors : (20  2) mm
radius of curvature of castor tread: (130  5) mm
crank distance: (32  2) mm
The distance between any two castor mountings shall be (225  5) mm.
The castors shall be Type H in accordance with EN 12529:1998. The castor treads shall be made 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 platform when the apparatus is stationary.
5.5 Cycle counter, for setting the number of cycles of the testing platform.
5.6 Suction device, with a flow rate of 25 to 30 l/s 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. polymethylmethacrylate) of
(7  2) mm thickness and diameter (800  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 (10  2) mm, external diameter (700  5) mm and internal
diameter (680  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 ISO 1957.
6.2 Prepare the specimens as follows.
6.2.1 Test A
Cut either three semi-circles or six quadrants of radius (350  3) mm ensuring that the edges are parallel to
and/or at right angles to the direction of manufacture. Cut also a reference specimen with dimensions of
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SIST EN 985:2001
EN 985:2001 (E)
(200  2) mm x (200  2) mm. In all cases mark the specimens with the direction of manufacture.
If testing only one textile floor covering a third specimen is required to fill the gap left by removal of the 5 000
cycle specimen (see 8.4.2).
6.2.2 Test B
If possible, test different batches/colour ways during each test.
Cut either one semi-circle or one quadrant of radius (350  3) mm from each batch/colour. Cut also a reference
specimen, with dimensions of (200  2 ) mm by (200  2) mm.
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