Paints and varnishes - Coating materials and coating systems for exterior wood - Part 8: Determination of the adhesion on wood after water exposure by a double-X-cut test

This document describes the method for assessing the resistance of paint coatings to separation from substrates when a double-X pattern is cut into the coating, penetrating through to the substrate and using a tape.
Where a measurement of adhesion is required, the method described in CEN/TS 927-9 may be used.
The double X-cut pattern has been especially designed for wood and wood like substrates to minimise the effects from the incisions and at the same time provide a coating segment enclosed by four cuts.

Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für Holz im Außenbereich - Teil 8: Bestimmung der Haftfestigkeit auf Holz durch Doppel-Kreuzschnittprüfung nach Wasserbeanspruchung

Dieses Dokument beschreibt das Verfahren zur Beurteilung der Abreißfestigkeit von Beschichtungen gegenüber Substraten mittels Doppel-Kreuzschnitt in der Beschichtung, welcher bis zum Substrat vordringt, unter Verwendung eines Klebebandes.
Wenn eine Messung der Haftfestigkeit erforderlich ist, kann das in CEN/TS 927 9 beschriebene Verfahren verwendet werden.
Der Doppel-Kreuzschnitt wurde speziell für Holz und holzähnliche Substrate entwickelt, um die Auswirkungen der Schnitte zu minimieren und gleichzeitig ein von vier Schnitten umschlossenes Beschichtungssegment zu bilden.

Peintures et vernis - Produits de peinture et systèmes de peinture pour le bois en extérieur - Partie 8 : Détermination de l’adhésion sur le bois après une exposition à l’eau lors d’un essai avec double incision en X

Barve in laki - Premazi in premazni sistemi za zaščito lesa za zunanjo uporabo - 8. del: Določevanje oprijema na vlažnem lesu z uporabo dvojnega križnega reza

General Information

Status
Published
Publication Date
18-Feb-2020
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
19-Feb-2020
Completion Date
19-Feb-2020

Buy Standard

Technical specification
-TS CEN/TS 927-8:2020
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day
Technical specification
-TS FprCEN/TS 927-8:2019
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST-TS CEN/TS 927-8:2020
01-april-2020

Barve in laki - Premazi in premazni sistemi za zaščito lesa za zunanjo uporabo - 8.

del: Določevanje oprijema na vlažnem lesu z uporabo dvojnega križnega reza

Paints and varnishes - Coating materials and coating systems for exterior wood - Part 8:

Determination of the adhesion on wood after water exposure by a double-X-cut test

Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für Holz im
Außenbereich - Teil 8: Bestimmung der Haftfestigkeit auf Holz durch Doppel-
Kreuzschnittprüfung nach Wasserbeanspruchung

Peintures et vernis - Produits de peinture et systèmes de peinture pour le bois en

extérieur - Partie 8 : Détermination de l’adhésion sur le bois après une exposition à l’eau

lors d’un essai avec double incision en X
Ta slovenski standard je istoveten z: CEN/TS 927-8:2020
ICS:
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
87.040 Barve in laki Paints and varnishes
SIST-TS CEN/TS 927-8:2020 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST-TS CEN/TS 927-8:2020
---------------------- Page: 2 ----------------------
SIST-TS CEN/TS 927-8:2020
CEN/TS 927-8
TECHNICAL SPECIFICATION
SPÉCIFICATION TECHNIQUE
February 2020
TECHNISCHE SPEZIFIKATION
ICS 87.040
English Version
Paints and varnishes - Coating materials and coating
systems for exterior wood - Part 8: Determination of the
adhesion on wood after water exposure by a double-X-cut
test

Peintures et vernis - Produits de peinture et systèmes Beschichtungsstoffe - Beschichtungsstoffe und

de peinture pour le bois en extérieur - Partie 8 : Beschichtungssysteme für Holz im Außenbereich - Teil

Détermination de l'adhésion sur le bois après une 8: Bestimmung der Haftfestigkeit auf Holz durch

exposition à l'eau lors d'un essai avec double incision Doppel-Kreuzschnittprüfung nach

en X Wasserbeanspruchung

This Technical Specification (CEN/TS) was approved by CEN on 21 October 2019 for provisional application.

The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to

submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard.

CEN members are required to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS

available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in

parallel to the CEN/TS) until the final decision about the possible conversion of the CEN/TS into an EN is reached.

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. CEN/TS 927-8:2020 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST-TS CEN/TS 927-8:2020
CEN/TS 927-8:2020 (E)
Contents Page

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

Introduction .................................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Principle ............................................................................................................................................................. 5

5 Apparatus and materials .............................................................................................................................. 5

6 Samples ............................................................................................................................................................... 6

7 Procedure........................................................................................................................................................... 6

7.1 Cleaning of test surface ................................................................................................................................. 6

7.2 Making a double-X-cut ................................................................................................................................... 6

7.3 Application and removal of the tape (dry conditions) ...................................................................... 7

7.4 Application and removal of the tape after wetting (wet conditions) ........................................... 7

8 Results ................................................................................................................................................................. 7

9 Test report ...................................................................................................................................................... 12

Annex A (normative) Requirements for field testing ................................................................................... 14

Annex B (normative) Testing the tape - Determination of adhesive strength of tape on test

surface .............................................................................................................................................................. 15

Bibliography ................................................................................................................................................................. 16

---------------------- Page: 4 ----------------------
SIST-TS CEN/TS 927-8:2020
CEN/TS 927-8:2020 (E)
European foreword

This document (CEN/TS 927-8:2020) has been prepared by Technical Committee CEN/TC 139 “Paints

and varnishes”, the secretariat of which is held by DIN.

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.

According to the CEN/CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to announce this Technical Specification: 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.
---------------------- Page: 5 ----------------------
SIST-TS CEN/TS 927-8:2020
CEN/TS 927-8:2020 (E)
Introduction

This Technical Specification (CEN/TS 927-8) is one of two methods for assessing the resistance of a

coating system to removal by external forces provided by either double-X-cutting or direct pull-off

(CEN/TS 927-9). Two existing ISO Standards (EN ISO 2409 and EN ISO 4624) specify test methods for

dry substrates in general, but make no provision for wet conditions, where wood coatings are known to

be particularly vulnerable. Both CEN methods (CEN/TS 927-8 and CEN/TS 927-9) take into account the

special nature of wood as a substrate because as well wet conditions as the selection of the substrate

are considered.

The adhesion of a coating system to a wood substrate can be reduced by high moisture content

particularly at the wood/coating interface. Water can access this interface either from the outside

because the coating film itself is permeable or through film defects. Water can also come from the wood

substrate, and thus reach the coating film from the rear. The described method is applicable for testing

the adhesion of a coating system to wood or wood based substrates under both dry and wet conditions.

---------------------- Page: 6 ----------------------
SIST-TS CEN/TS 927-8:2020
CEN/TS 927-8:2020 (E)
1 Scope

This document describes the method for assessing the resistance of paint coatings to separation from

substrates when a double-X pattern is cut into the coating, penetrating through to the substrate and

using a tape.
Where a m
...

SLOVENSKI STANDARD
kSIST-TS FprCEN/TS 927-8:2019
01-september-2019

Barve in laki - Premazi in premazni sistemi za zaščito lesa za zunanjo uporabo - 8.

del: Določevanje oprijema na vlažnem lesu z uporabo dvojnega križnega reza

Paints and varnishes - Coating materials and coating systems for exterior wood - Part 8:

Determination of the adhesion on wood after water exposure by a double-X-cut test

Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme für Holz im
Außenbereich - Teil 8: Bestimmung der Haftfestigkeit auf Holz durch Doppel-
Kreuzschnittprüfung nach Wasserbeanspruchung

Peintures et vernis - Produits de peinture et systèmes de peinture pour le bois en

extérieur - Partie 8 : Détermination de l’adhésion sur le bois après une exposition à l’eau

lors d’un essai avec double incision en X
Ta slovenski standard je istoveten z: FprCEN/TS 927-8
ICS:
71.100.50 Kemikalije za zaščito lesa Wood-protecting chemicals
87.040 Barve in laki Paints and varnishes
kSIST-TS FprCEN/TS 927-8:2019 en,fr,de

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

---------------------- Page: 1 ----------------------
kSIST-TS FprCEN/TS 927-8:2019
---------------------- Page: 2 ----------------------
kSIST-TS FprCEN/TS 927-8:2019
FINAL DRAFT
TECHNICAL SPECIFICATION
FprCEN/TS 927-8
SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION
June 2019
ICS 87.040
English Version
Paints and varnishes - Coating materials and coating
systems for exterior wood - Part 8: Determination of the
adhesion on wood after water exposure by a double-X-cut
test

Peintures et vernis - Produits de peinture et systèmes Beschichtungsstoffe - Beschichtungsstoffe und

de peinture pour le bois en extérieur - Partie 8 : Beschichtungssysteme für Holz im Außenbereich - Teil

Détermination de l'adhésion sur le bois après une 8: Bestimmung der Haftfestigkeit auf Holz durch

exposition à l'eau lors d'un essai avec double incision Doppel-Kreuzschnittprüfung nach

en X Wasserbeanspruchung

This draft Technical Specification is submitted to CEN members for Vote. It has been drawn up by the Technical Committee

CEN/TC 139.

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.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a Technical Specification. It is distributed for review and comments. It is subject to change

without notice and shall not be referred to as a Technical Specification.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. FprCEN/TS 927-8:2019 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
kSIST-TS FprCEN/TS 927-8:2019
FprCEN/TS 927-8:2019 (E)
Contents Page

Introduction .................................................................................................................................................................... 3

European foreword ....................................................................................................................................................... 4

1 Scope .................................................................................................................................................................... 5

2 Normative references .................................................................................................................................... 5

3 Terms and definitions ................................................................................................................................... 5

4 Principle ............................................................................................................................................................. 5

5 Apparatus and materials .............................................................................................................................. 5

6 Samples ............................................................................................................................................................... 6

7 Procedure........................................................................................................................................................... 6

7.1 Cleaning of test surface ................................................................................................................................. 6

7.2 Making a double-X-cut ................................................................................................................................... 6

7.3 Application and removal of the tape (dry conditions) ...................................................................... 7

7.4 Application and removal of the tape after wetting (wet conditions) ........................................... 7

8 Results ................................................................................................................................................................. 7

9 Test report ...................................................................................................................................................... 12

Annex A (normative) Requirements for field testing ..................................................................................... 14

Annex B (normative) Testing the tape - Determination of adhesive strength of tape on test

surface .............................................................................................................................................................. 15

Bibliography ................................................................................................................................................................. 16

---------------------- Page: 4 ----------------------
kSIST-TS FprCEN/TS 927-8:2019
FprCEN/TS 927-8:2019 (E)
Introduction

This Technical Specification (CEN/TS 927-8) is one of two methods for assessing the resistance of a

coating system to removal by external forces provided by either double-X-cutting or direct pull-off

(CEN/TS 927-9). Two existing ISO Standards (EN ISO 2409 and EN ISO 4624) specify test methods for

dry substrates in general, but make no provision for wet conditions, where wood coatings are known to

be particularly vulnerable. Both CEN methods (CEN/TS 927-8 and CEN/TS 927-9) take into account the

special nature of wood as a substrate because as well wet conditions as the selection of the substrate

are considered.

The adhesion of a coating system to a wood substrate can be reduced by high moisture content

particularly at the wood/coating interface. Water can access this interface either from the outside

because the coating film itself is permeable or through film defects. Water can also come from the wood

substrate, and thus reach the coating film from the rear. The described method is applicable for testing

the adhesion of a coating system to wood or wood based substrates under both dry and wet conditions.

---------------------- Page: 5 ----------------------
kSIST-TS FprCEN/TS 927-8:2019
FprCEN/TS 927-8:2019 (E)
European foreword

This document (FprCEN/TS 927-8:2019) has been prepared by Technical Committee CEN/TC 139

“Paints and varnishes”, the secretariat of which is held by DIN.
This document is currently submitted to the Vote on TS.
---------------------- Page: 6 ----------------------
kSIST-TS FprCEN/TS 927-8:2019
FprCEN/TS 927-8:2019 (E)
1 Scope

This document describes the method for assessing the resistance of paint coatings to separation from

substrates when a double-X pattern is cut into the coating, penetrating through to the substrate and

using a tape.

Where a measurement of adhesion is required, the method described in CEN/TS 927-9 may be used.

The double X-cut pattern has been especially designed for wood and wood like substrates to minimize

the effects from the incisions and at the same time provide a coating segment enclosed by four cuts.

2 Normative references
The following documents are referred to in the text in su
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.