Adhesives - One component polyurethane (PUR) for load-bearing timber structures - Classification and performance requirements

This document establishes a classification for one component polyurethane (PUR) adhesives according to their suitability for use in load-bearing timber products in defined climatic exposure conditions, and specifies performance requirements for such adhesives for the factory manufacture or factory-like manufacturing of load-bearing timber products only.
It also classifies “adhesive product lines” where all the products within the line have the same chemical composition except for a different amount of catalyst.
This document only specifies the performance of adhesives for use in an environment corresponding to the defined conditions.
The performance requirements of this document are applicable to the adhesives only, not to the manufactured timber products. This document does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) or the production of wood-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. acetylated wood, heat treated wood and polymer impregnated wood.
This document is primarily intended for use by adhesive manufacturers and for use in timber products bonded with adhesives, to assess or control the quality of adhesives. The requirements are applicable to the type testing of the adhesives. Production control activities are outside the scope of this document.
Adhesives meeting the requirements of this document are adequate for use in load-bearing timber products, provided that the bonding process has been carried out according to an appropriate product standard.
This document does not address the classification and use of adhesives in combination with the spraying of water before or during the bonding process; see informative Annex C of this document.
This does neither allow nor forbid the use of adhesives in combination with the spraying of water.

Klebstoffe - Einkomponenten-Klebstoffe auf Polyurethanbasis (PUR) für tragende Holzbauteile - Klassifizierung und Leistungsanforderungen

Dieses Dokument stellt eine Klassifizierung für Einkomponenten-Klebstoffe auf Polyurethanbasis (PUR) entsprechend ihrer Eignung zur Verwendung für tragende Holzprodukte unter bestimmten Klimabedingungen auf und legt die Leistungsanforderungen an derartige Klebstoffe ausschließlich zur werksmäßigen Herstellung oder Herstellung unter werksähnlichen Bedingungen von tragenden Holzprodukten fest.
Darüber hinaus werden „Klebstoffproduktlinien“ klassifiziert, bei denen alle Produkte innerhalb der Linie die gleiche chemische Zusammensetzung haben, abgesehen von einer unterschiedlichen Menge an Katalysator.
Dieses Dokument legt nur das Leistungsverhalten von Klebstoffen für den Einsatz in einer Umgebung fest, die den festgelegten Bedingungen entspricht.
Die Leistungsanforderungen in diesem Dokument sind lediglich für den Klebstoff, nicht für das Holzprodukt anwendbar. Dieses Dokument behandelt weder das Leistungsverhalten von Klebstoffen für die Vor-Ort-Verklebung (ausgenommen bei werksähnlichen Bedingungen) noch die Produktion von Holzwerkstoffen, ausgenommen Massivholzplatten. Es ist nicht für modifiziertes und vergütetes Holz mit beträchtlich verringerten Quellungs- und Schwindungseigenschaften anwendbar, wie z. B. acetyliertes Holz, wärmebehandeltes Holz und mit Kunstharz imprägniertes Holz.
Dieses Dokument ist in erster Linie für die Verwendung durch die Hersteller der Klebstoffe und der verklebten Holzprodukte bestimmt, um die Qualität von Klebstoffen zu beurteilen oder zu überprüfen. Die Anforderungen sind für die Typprüfung von Klebstoffen anwendbar. Aktivitäten im Rahmen der Produktionskontrolle gehören nicht zum Anwendungsbereich dieses Dokuments.
Klebstoffe, die die Anforderungen dieses Dokuments erfüllen, sind für den Einsatz in tragenden Holzprodukten geeignet, vorausgesetzt, dass der Verklebungsvorgang nach einer entsprechenden Produktnorm vorgenommen wurde.
Dieses Dokument behandelt nicht die Klassifizierung und Verwendung von Klebstoffen in Kombination mit dem Besprühen mit Wasser vor oder während des Verklebungsvorgangs. Siehe hierzu den informativen Anhang C dieses Dokuments.
Dies gestattet oder verbietet nicht die Verwendung von Klebstoffen in Kombination mit dem Besprühen mit Wasser.

Adhésifs - Adhésifs polyuréthane monocomposants (PUR) pour structures portantes en bois - Classification et exigences de performance

Le présent document établit une classification des adhésifs polyuréthane monocomposants (PUR) en fonction de leur aptitude à l’emploi dans les structures portantes en bois dans des conditions d’exposition climatique définies, et spécifie les exigences de performance applicables à ces adhésifs uniquement lorsqu’ils sont utilisés pour la fabrication en usine de structures portantes en bois, ou dans des conditions semblables à la fabrication en usine.
Il classifie également les « gammes de produits adhésifs » dont les produits présentent tous la même composition chimique, à l’exception de la quantité de catalyseur.
Le présent document spécifie la performance des adhésifs uniquement dans l’environnement correspondant aux conditions définies.
Les exigences relatives à la performance définies dans le présent document ne s’appliquent qu’aux adhésifs et non aux produits manufacturés en bois. Le présent document ne couvre pas la performance des adhésifs utilisés pour le collage sur site (à l’exception des conditions semblables à la fabrication en usine) ou pour la fabrication de panneaux à base de bois, à l’exception des panneaux en bois massif, ou pour le bois modifié et stabilisé ayant une propension considérablement réduite au gonflement et au retrait, par exemple le bois acétylé, le bois traité à la chaleur et le bois imprégné de polymère.
Le présent document s’adresse avant tout aux fabricants d’adhésifs pour leur permettre, dans le domaine des produits en bois collés, d’évaluer ou de contrôler la qualité des adhésifs. Les exigences s’appliquent aux essais de type des adhésifs. Les activités de contrôle de la production ne relèvent pas du domaine d’application du présent document.
Les adhésifs répondant aux exigences du présent document conviennent à une utilisation dans des structures portantes en bois, à condition que le processus de collage ait été réalisé conformément à une norme de produit appropriée.
Le présent document n’a pas pour objet la classification ni l’utilisation d’adhésifs en combinaison avec l’aspersion d’eau avant ou pendant le processus de collage ; voir l’Annexe C informative du présent document.
Il ne permet pas ni n’interdit l’utilisation d’adhésifs en combinaison avec l’aspersion d’eau.

Lepila - Enokomponentni poliuretan (PUR) za nosilne lesene konstrukcije - Razvrstitev in zahtevane lastnosti

Ta dokument določa razvrstitev za lepila iz enokomponentnega poliuretana (PUR) v skladu z njihovo primernostjo za uporabo pri nosilnih lesenih izdelkih pri določenih pogojih izpostavljenosti podnebnim razmeram; določa zahtevane lastnosti za taka lepila za tovarniško proizvodnjo ali tovarni podobno proizvodnjo izključno nosilnih lesenih izdelkov.
Razvršča tudi »lepilne linije«, pri čemer imajo vsi izdelki znotraj linije skoraj enake fizikalne/kemijske lastnosti in zmogljivost lepljenja, vendar različno reaktivnost.
Ta dokument določa lastnosti lepil izključno za uporabo v okolju, ki ustreza podanim pogojem.
Zahteve glede učinkovitosti v tem dokumentu se uporabljajo samo za lepila, ne za proizvedene lesene izdelke. Ta dokument ne zajema lastnosti lepil za lepljenje na mestu uporabe (razen v pogojih, podobnih tovarniškim) niti proizvodnje lesnih plošč, razen polnih lesnih plošč, ali obdelanega in stabiliziranega lesa, ki bistveno manj nabreka in se krči, kot so acetiliran les, toplotno obdelan les in polimerno impregniran les.
Ta dokument je namenjen predvsem za proizvajalce lepil in za uporabo pri lesenih izdelkih, vezanih z lepili, za ocenjevanje ali nadzor kakovosti lepil. Zahteve se uporabljajo za tipsko preskušanje lepil. Dejavnosti kontrole proizvodnje ne spadajo na področje uporabe tega dokumenta.
Lepila, ki izpolnjujejo zahteve tega dokumenta, so primerna za uporabo pri nosilnih lesenih izdelkih pod pogojem, da je bil postopek vezave izveden v skladu z ustreznim standardom za proizvod.
Ta dokument ne obravnava razvrščanja in uporabe lepil v kombinaciji z razprševanjem vode pred postopkom lepljenja ali med njim; glej informativno Prilogo C k temu dokumentu.
To ne dovoljuje niti ne prepoveduje uporabe lepil v kombinaciji z brizganjem vode.

General Information

Status
Published
Publication Date
14-Feb-2023
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
15-Feb-2023
Due Date
19-Aug-2023
Completion Date
15-Feb-2023

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SLOVENSKI STANDARD
01-april-2023
Lepila - Enokomponentni poliuretan (PUR) za nosilne lesene konstrukcije -
Razvrstitev in zahtevane lastnosti
Adhesives - One component polyurethane (PUR) for load-bearing timber structures -
Classification and performance requirements
Klebstoffe - Einkomponenten-Klebstoffe auf Polyurethanbasis (PUR) für tragende
Holzbauteile - Klassifizierung und Leistungsanforderungen
Adhésifs - Adhésifs polyuréthane monocomposants (PUR) pour structures portantes en
bois - Classification et exigences de performance
Ta slovenski standard je istoveten z: EN 15425:2023
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 15425
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2023
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 15425:2017
English Version
Adhesives - One component polyurethane (PUR) for load-
bearing timber structures - Classification and performance
requirements
Adhésifs - Adhésifs polyuréthane monocomposants Klebstoffe - Einkomponenten-Klebstoffe auf
(PUR) pour structures portantes en bois - Classification Polyurethanbasis (PUR) für tragende Holzbauteile -
et exigences de performance Klassifizierung und Leistungsanforderungen
This European Standard was approved by CEN on 18 December 2022.

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, Türkiye 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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 15425:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Classification. 8
5 Requirements . 11
5.1 General. 11
5.2 Bond strength in longitudinal tensile shear test . 12
5.3 Resistance to delamination . 13
5.4 Tensile strength perpendicular to the bond line after climatic treatment (acid damage
test) . 13
5.5 Effect of wood shrinkage on the shear strength . 13
5.6 Static load test of multiple bond line specimens in compression shear . 13
5.7 Creep deformation test at cyclic climate conditions with specimens loaded in bending
shear . 14
5.7.1 Application area “Finger-jointing” – close contact glue line in test . 14
5.7.2 Application area “General purpose” – 0,3 mm glue line thickness in test . 14
5.7.3 Application area “Special purpose” – 0,5 mm glue line thickness in test . 14
5.8 Long-term sustained load test at cyclic climate conditions with specimens loaded
perpendicular to the bond line (“Glass house test”) . 14
5.9 Delamination test on finger-jointed test pieces. 14
6 Test methods . 15
6.1 General. 15
6.2 Determination of longitudinal tensile shear strength . 15
6.3 Determination of resistance to delamination . 15
6.4 Determination of tensile strength perpendicular to the bond line after climatic
treatment (acid damage test) . 15
6.5 Determination of the effect of wood shrinkage on the shear strength. 15
6.6 Static load test of multiple bond line specimens in compression shear . 15
6.7 Creep deformation test with specimens loaded in bending shear . 16
6.8 Long-term sustained load test at cyclic climate conditions with specimens loaded
perpendicular to the bond line (“Glass house test”) . 16
6.9 Delamination test on finger-jointed test pieces. 16
7 Working properties of the adhesive . 16
7.1 General. 16
7.2 Determination of initial viscosity under reference conditions . 16
7.3 Determination of open assembly time under reference conditions . 16
7.4 Determination of pressing time under reference conditions . 17
8 Marking and labelling . 17
Annex A (normative) Climatic treatment prior to shear test . 18
Annex B (normative) Delamination test for bonding of finger-joints. 19
B.1 Production of the specimens . 19
B.2 Testing . 20
B.3 Expression of results . 21
B.4 Test report . 21
B.4.1 Adhesive . 21
B.4.2 Preparation of test pieces and testing procedure . 21
B.4.3 Test results. 22
Annex C (informative) Information on bonding operations with one-component
polyurethane adhesives in combination with water-spraying . 23
Bibliography . 24

European foreword
This document (EN 15425:2023) has been prepared by Technical Committee CEN/TC 193 “Adhesives”,
the secretariat of which is held by UNE.
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 August 2023, and conflicting national standards shall be
withdrawn at the latest by August 2023.
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 15425:2017.
a) for adhesive type “Special purpose”, the test according to EN 302-8 is performed with a bond line
thickness of 0,5 mm;
b) an additional adhesive subtype I-SP-70-0,5 has been added in Table 1;
c) for adhesive type FJ, the test according to EN 302-2 is required only with short closed assembly time,
and the test according to EN 15416-5 is only required with thin glue line;
d) for finger joint delamination tests on additional wood species, the reference to EN 301 has been
replaced by a new Annex B;
e) for the delamination test according to EN 302-2 with preservative treated wood, a test with Scots
pine (Pinus sylvestris) and silver fir (Abies alba) covers also Norway spruce (Picea abies L.);
f) the description of the test procedure for an “adhesive line” has been modified;
g) the description of a test procedure when a primer is used in all bonding operations has been added
in Clause 4;
h) provisions and maximum tolerance for testing and application of a primer have been added in 5.1;
i) information on water spraying has been included in the scope and as a new Annex C.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organisations 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, Türkiye and the United
Kingdom.
Introduction
This document is one of a series dealing with one component polyurethane adhesives for use with timber
structures, and is published in support of product standards for load-bearing timber structures in
connection with EN 1995-1-1, Eurocode 5: Design of timber structures — Part 1-1: General — Common
rules and rules for buildings.
The series consists of:
— one standard for classification and performance requirements (EN 15425);
— eight test methods (EN 302-1, EN 302-2, EN 302-3, EN 302-4, EN 302-8, EN 15416-1 (“Glass house
test”), EN 15416-3 and Annex B of this document) used to assess the performance of adhesives after
specified heat and humidity treatments; and
— three test methods (EN ISO 2555 (reference in EN 302-7), EN 15416-4, and EN 15416-5) to
characterize the working properties of the adhesives.
Safety statement
Persons using this document should be familiar with the normal laboratory practice, if applicable. This
document cannot address all of the safety problems, if any, associated with its use. It is the responsibility
of the user to establish appropriate safety and health practices and to ensure compliance with any
regulatory conditions.
Environmental statement
It is understood that some of the material permitted in this document may have negative environmental
impact. As technological advantages lead to better alternatives for these materials, they will be eliminated
from this European Standard to the extent possible.
At the end of the test, it is recommended that the users of this document take care to carry out an
appropriate disposal of the wastes, according to local regulations.
1 Scope
This document establishes a classification for one component polyurethane (PUR) adhesives according
to their suitability for use in load-bearing timber products in defined climatic exposure conditions, and
specifies performance requirements for such adhesives for the factory manufacture or factory-like
manufacturing of load-bearing timber products only.
It also classifies “adhesive product lines” where all the products within the line have the sa
...

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