Textile floor coverings - Determination of mass loss, fibre bind and stair nosing appearance change using the Lisson Tretrad machine (ISO 12951:2020)

This document specifies four methods of test for textile floor coverings (with or without an underlay,
see Clause 9) using the Lisson Tretrad machine.
— test A: determination of mass loss of textile floor coverings, also used to assess fibre bind of synthetic
pile carpets;
— test B: determination of stair nosing appearance change of textile floor coverings;
— test C: determination of fibre bind on synthetic loop pile carpets;
— test D: determination of fibre bind (hairiness) on needled floor coverings and floor coverings
without pile.

Textile Bodenbeläge - Bestimmung des Masseverlustes, der Fasereinbindung und der Treppenkantenprüfung mittels Lisson-Tretradgerät (ISO 12951:2020)

Dieses Dokument legt vier Prüfverfahren für textile Bodenbeläge (mit oder ohne Unterlage, siehe Abschnitt 9) mit dem Lisson-Tretradgerät fest:
- Prüfung A: Bestimmung des Masseverlustes textiler Bodenbeläge, auch zur Bestimmung der Fasereinbindung synthetischer Polteppiche verwendet;
- Prüfung B: Bestimmung der Änderung des Aussehens textiler Bodenbeläge an Treppenkanten;
- Prüfung C: Bestimmung der Fasereinbindung von Synthetik-Schlingenpol-Bodenbelägen;
- Prüfung D: Bestimmung der Fasereinbindung (Haarigkeit) von Nadelvlies-Bodenbelägen und Bodenbelägen ohne Pol.

Revêtements de sol textiles - Détermination de la perte de masse, de la sensibilité au défibrage et du changement d'aspect au nez de marche à l'aide la machine Lisson Tretrad (ISO 12951:2020)

Le présent document spécifie quatre méthodes d'essai de revêtements de sol textiles (avec ou sans thibaude, voir l'Article 9) à l'aide de la machine Lisson Tretrad.
— Essai A: détermination de la perte de masse des revêtements de sol textiles, utilisé également pour évaluer la sensibilité au défibrage de moquettes synthétiques;
— Essai B: détermination du changement d'aspect au nez de marche des revêtements de sol textiles;
— Essai C: détermination de la sensibilité au défibrage des moquettes synthétiques de velours bouclé;
— Essai D: détermination de la sensibilité à l'ébouriffage des revêtements de sol aiguilletés et des revêtements de sol sans velours.

Tekstilne talne obloge - Ugotavljanje masne izgube vlaken in spremembe videza z uporabo Lissonovega aparata Tretrad (ISO 12951:2020)

General Information

Status
Published
Public Enquiry End Date
04-Aug-2019
Publication Date
09-Jul-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
02-Jul-2020
Due Date
06-Sep-2020
Completion Date
10-Jul-2020

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SLOVENSKI STANDARD
SIST EN ISO 12951:2020
01-september-2020
Nadomešča:
SIST EN ISO 12951:2015
Tekstilne talne obloge - Ugotavljanje masne izgube vlaken in spremembe videza z
uporabo Lissonovega aparata Tretrad (ISO 12951:2020)

Textile floor coverings - Determination of mass loss, fibre bind and stair nosing

appearance change using the Lisson Tretrad machine (ISO 12951:2020)
Textile Bodenbeläge - Bestimmung des Masseverlustes, der Fasereinbindung und der
Treppenkantenprüfung mittels Lisson-Tretradgerät (ISO 12951:2020)

Revêtements de sol textiles - Détermination de la perte de masse, de la sensibilité au

défibrage et du changement d'aspect au nez de marche à l'aide la machine Lisson
Tretrad (ISO 12951:2020)
Ta slovenski standard je istoveten z: EN ISO 12951:2020
ICS:
97.150 Talne obloge Floor coverings
SIST EN ISO 12951:2020 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 12951:2020
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SIST EN ISO 12951:2020
EN ISO 12951
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2020
EUROPÄISCHE NORM
ICS 97.150 Supersedes EN ISO 12951:2015
English Version
Textile floor coverings - Determination of mass loss, fibre
bind and stair nosing appearance change using the Lisson
Tretrad machine (ISO 12951:2020)

Revêtements de sol textiles - Détermination de la perte Textile Bodenbeläge - Bestimmung des Masseverlustes,

de masse, de la sensibilité au défibrage et du der Fasereinbindung und der Treppenkantenprüfung

changement d'aspect au nez de marche à l'aide la mittels Lisson-Tretradgerät (ISO 12951:2020)

machine Lisson Tretrad (ISO 12951:2020)
This European Standard was approved by CEN on 14 May 2020.

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 CEN-CENELEC 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 CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 12951:2020 E

worldwide for CEN national Members.
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SIST EN ISO 12951:2020
EN ISO 12951:2020 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 12951:2020
EN ISO 12951:2020 (E)
European foreword

This document (EN ISO 12951:2020) has been prepared by Technical Committee ISO/TC 219 "Floor

coverings" in collaboration with Technical Committee CEN/TC 134 “Resilient, textile and laminate floor

coverings” the secretariat of which is held by NBN.

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 December 2020, and conflicting national standards

shall be withdrawn at the latest by December 2020.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 12951:2015.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,

Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of

North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the

United Kingdom.
Endorsement notice

The text of ISO 12951:2020 has been approved by CEN as EN ISO 12951:2020 without any modification.

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SIST EN ISO 12951:2020
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SIST EN ISO 12951:2020
INTERNATIONAL ISO
STANDARD 12951
Third edition
2020-05
Textile floor coverings —
Determination of mass loss, fibre bind
and stair nosing appearance change
using the Lisson Tretrad machine
Revêtements de sol textiles — Détermination de la perte de masse,
de la sensibilité au défibrage et du changement d'aspect au nez de
marche à l'aide la machine Lisson Tretrad
Reference number
ISO 12951:2020(E)
ISO 2020
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SIST EN ISO 12951:2020
ISO 12951:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
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SIST EN ISO 12951:2020
ISO 12951:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 2

5 Apparatus ..................................................................................................................................................................................................................... 2

5.1 Lisson Tretrad machine ................................................................................................................................................................... 2

5.1.1 General...................................................................................................................................................................................... 2

5.1.2 Bed plate ................................................................................................................................................................................. 3

5.1.3 Tretrad assemblies ......................................................................................................................................................... 3

5.1.4 Vacuum cleaning system ........................................................................................................................................... 3

6 Sampling and selection of test specimens ................................................................................................................................. 5

7 Atmosphere for conditioning and testing .................................................................................................................................. 5

8 Calibration ................................................................................................................................................................................................................. 6

8.1 Choice of the calibration carpet................................................................................................................................................ 6

8.1.1 Method 1 ................................................................................................................................................................................. 6

8.1.2 Method 2 ................................................................................................................................................................................. 6

8.2 Calibration of the apparatus ........................................................................................................................................................ 6

9 Procedure..................................................................................................................................................................................................................... 7

9.1 General ........................................................................................................................................................................................................... 7

9.2 Test A — Determination of mass loss of textile floor coverings ................................................................... 7

9.3 Test B — Determination of stair nosing: appearance change of textile floor coverings ......... 8

9.4 Test C — Determination of fibre bind on synthetic loop pile carpets ..................................................... 8

9.5 Test D — Determination of fibre bind (hairiness) on needled floorcoverings and

floor coverings without pile......................................................................................................................................................... 9

10 Calculation and expression of results ............................................................................................................................................. 9

10.1 Test A ............................................................................................................................................................................................................... 9

10.2 Test B ............................................................................................................................................................................................................10

10.3 Test C ............................................................................................................................................................................................................10

10.4 Test D ............................................................................................................................................................................................................10

10.5 Unusual phenomena .......................................................................................................................................................................11

11 Test report ................................................................................................................................................................................................................11

Annex A (informative) Examples of failure at 400 cycles .............................................................................................................12

© ISO 2020 – All rights reserved iii
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SIST EN ISO 12951:2020
ISO 12951:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 219, Floor coverings, in collaboration with

the European Committee for Standardization (CEN) Technical Committee CEN/TC 134, Resilient, textile

and laminate floor coverings, in accordance with the Agreement on technical cooperation between ISO

and CEN (Vienna Agreement).

This third edition cancels and replaces the second edition (ISO 12951:2015), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— two different methods are described for calibrating the apparatus;
— a better description of how to assess test C is provided;
— examples of failure are given in Annex A.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved
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SIST EN ISO 12951:2020
INTERNATIONAL STANDARD ISO 12951:2020(E)
Textile floor coverings — Determination of mass loss, fibre
bind and stair nosing appearance change using the Lisson
Tretrad machine
1 Scope

This document specifies four methods of test for textile floor coverings (with or without an underlay,

see Clause 9) using the Lisson Tretrad machine.

— test A: determination of mass loss of textile floor coverings, also used to assess fibre bind of synthetic

pile carpets;

— test B: determination of stair nosing appearance change of textile floor coverings;

— test C: determination of fibre bind on synthetic loop pile carpets;

— test D: determination of fibre bind (hairiness) on needled floor coverings and floor coverings

without pile.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 139, Textiles — Standard atmospheres for conditioning and testing
ISO 1765, Machine-made textile floor coverings — Determination of thickness

ISO 1957, Machine-made textile floor coverings — Selection and cutting of specimens for physical tests

ISO 2424, Textile floor coverings — Vocabulary
ISO 8543, Textile floor coverings — Methods for determination of mass
ISO 9405, Textile floor coverings — Assessment of changes in appearance
EN 1307:2014+A3: 2018, Textile floor coverings — Classification
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 2424 and the following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
mass loss per unit area

difference between the sample mass before and after the wear test, related to the tested area

Note 1 to entry: See 10.1.
© ISO 2020 – All rights reserved 1
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SIST EN ISO 12951:2020
ISO 12951:2020(E)
3.2
relative mass loss

ratio of the mass loss per unit area (3.1), as a percentage of the mass of pile per unit area

above the substrate

Note 1 to entry: The mass of pile per unit area above the substrate is determined in accordance with ISO 8543.

4 Principle

The specimens of a textile floor covering are exposed, at constant load and slippage and for a prescribed

number of double passages, to the action of a four-footed wheel (Tretrad), the feet of which are fitted

with interchangeable sole coverings.
5 Apparatus
5.1 Lisson Tretrad machine
5.1.1 General

A Lisson Tretrad machine comprises a bed plate, a vacuum cleaning system, and two Tretrad assemblies

(see Figure 1).
Key
1 support 7 bed plate
2 cog bar 8 specimen
3 Tretrad wheel 9 vacuum suction nozzle
4 frame 10 tension weight
5 drive Movement of the Tretrad.
6 foot
Figure 1 — Lisson Tretrad machine
2 © ISO 2020 – All rights reserved
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SIST EN ISO 12951:2020
ISO 12951:2020(E)
5.1.2 Bed plate

The bed plate faces are parallel to the track travelled by the Tretrad feet and the front edge of the plate

is rounded with a 10 mm radius to simulate a stair nosing.

The test surface is formed by the width of the Tretrad feet and the length of the track over which the

Tretrad runs. The track length shall be determined for each machine by measuring the distance between

the front edge of the bed plate and the perpendicular projection of the Tretrad axis at its furthermost

point of reversal. The length of track shall be (800 ± 40) mm.

Two clamps mounted at each end of the bed plate are used to hold each specimen under tension. The

tension is applied by means of a weighted third clamp, each specimen being subjected to a tension

weight of (20 ± 2) kg.
5.1.3 Tretrad assemblies

The Lisson Tretrad machine has two Tretrad assemblies, each of which comprises a Tretrad mounted in

a frame that is free to rotate around an axis that is 135 mm to 140 mm above the upper surface of the

bed plate.
Each Tretrad comprises four e
...

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