Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification and performance requirements

This European Standard establishes a classification for phenolic and aminoplastic polycondensation adhesives according to their suitability for use for load-bearing timber structures in defined climatic exposure conditions, and specifies performance requirements for such adhesives for the factory manufacture or factory-like manufacturing conditions of load-bearing timber structures only.
This European Standard only specifies the performance of an adhesive for use in an environment corresponding to the defined conditions.
The performance requirements of this European Standard apply to the adhesive only, not to the timber structure. This European Standard does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) nor the production of wood-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. such as acetylated wood, heat treated wood and polymer impregnated wood.
This European Standard is primarily intended for the use of adhesive manufacturers and for the use in timber structures bonded with adhesives, to assess or control the quality of adhesives. The requirements apply to the type testing of the adhesives. Production control activities are outside the scope of this European Standard.
Adhesives meeting the requirements of this European Standard are adequate for use in a load-bearing timber structure, provided that the bonding process has been carried out according to an appropriate product standard.

Klebstoffe, Phenoplaste und Aminoplaste, für tragende Holzbauteile - Klassifizierung und Leistungsanforderungen

Diese Europäische Norm stellt ein Klassifizierungssystem für Polykondensationsklebstoffe auf Phenoplast- und Aminoplastbasis entsprechend deren Eignung zum Einsatz für tragende Holzbauteile unter vorgegebenen Klimabedingungen auf und legt die Leistungsanforderungen an derartige Klebstoffe ausschließlich zur werks-mäßigen Herstellung oder Herstellung unter werksähnlichen Bedingungen von tragenden Holzbauteilen fest.
Diese Europäische Norm legt nur das Leistungsverhalten eines Klebstoffs für den Einsatz in einer Umgebung fest, die den festgelegten Bedingungen entspricht.
Die Leistungsanforderungen dieser Europäischen Norm gelten lediglich für den Klebstoff, nicht für das Holz-bauteil. Diese Europäische Norm behandelt weder das Leistungsverhalten von Klebstoffen für die Vor-Ort-Verklebung (ausgenommen bei werksähnlichen Bedingungen) noch die Produktion von Holzwerkstoffen, ausgenommen Massivholzplatten; sie gilt nicht für modifiziertes und vergütetes Holz mit beträchtlich verrin¬gerten Quellungs- und Schwindungseigenschaften, wie z. B. acetyliertes Holz, wärmebehandeltes Holz und mit Kunstharz imprägniertes Holz.
Diese Europäische Norm ist im Wesentlichen für den Einsatz durch die Hersteller der Klebstoffe und zur Beurteilung oder Überprüfung der Qualität der Klebstoffe bei verklebten Holzbauteilen vorgesehen. Die Anfor-derungen gelten für die Typprüfung von Klebstoffen. Aktivitäten hinsichtlich der Produktionskontrolle gehören nicht zum Anwendungsbereich dieser Europäischen Norm.
Klebstoffe, die die Anforderungen dieser Europäischen Norm erfüllen, sind für den Einsatz in tragenden Holz-bauteilen geeignet, vorausgesetzt, dass der Verklebungsvorgang nach einer entsprechenden Produktnorm vorgenommen wurde.

Adhésifs de nature phénolique et aminoplaste, pour structures portantes en bois - Classification et exigences de performance

La présente Norme européenne établit une classification des adhésifs de polycondensation de type phénolique ou aminoplaste en fonction de leur aptitude à l'emploi dans les structures portantes en bois dans des conditions d'exposition climatique définies ; elle 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 similaires à la fabrication en usine.
La présente Norme européenne spécifie les performances de l'adhésif uniquement lorsqu'il est utilisé dans un environnement correspondant aux conditions définies.
Les exigences de performance de la présente Norme européenne ne s'appliquent qu'à l'adhésif ; elles ne s'appliquent pas à la structure en bois. La présente Norme européenne n'a pas pour objet la performance des adhésifs utilisés pour le collage sur site (à l'exception des conditions similaires 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 rétrécissement, comme par exemple le bois acétylé, le bois traité à la chaleur et le bois imprégné de polymère.
La présente Norme européenne s'adresse avant tout aux fabricants d'adhésifs pour leur permettre, dans le domaine des structures en bois collées, 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 de la présente Norme européenne.
Un adhésif répondant aux exigences définies dans la présente Norme européenne se comportera de manière satisfaisante dans une structure portante en bois, pour autant que les opérations de collage aient été effectuées en référence à une norme de produit appropriée.

Lepila na osnovi fenolov in aminoplastov za nosilne lesene konstrukcije - Razvrstitev in zahteve za delovanje

Ta evropski standard vzpostavlja razvrstitev za fenolna in aminoplastna polikondenzacijska lepila v skladu z njihovo primernostjo za uporabo pri nosilnih lesenih konstrukcijah pri določenih pogojih izpostavljenosti podnebnim razmeram ter določa zahtevane lastnosti za taka lepila za tovarniško proizvodnjo ali tovarniškim pogojem podobne proizvodne pogoje samo za nosilne lesene konstrukcije.
Ta evropski standard določa učinkovitost lepila izključno za uporabo v okolju, ki ustreza podanim pogojem.
Zahtevane lastnosti iz tega evropskega standarda se uporabljajo samo za lepilo in ne za lesene konstrukcije. Ta evropski standard ne zajema lastnosti lepil za lepljenje na mestu uporabe (razen v pogojih, podobnih tovarniškim) niti proizvodnje lesnih plošč, razen trdnih lesnih plošč, ali obdelanega in stabiliziranega lesa, ki bistveno manj nabreka in se krči, kot je acetiliran les, toplotno obdelan les ali polimerno impregniran les.
Ta evropski standard je namenjen predvsem za proizvajalce lepil in za uporabo pri lesenih konstrukcijah, vezanih z lepili, in sicer za ocenjevanje ali nadzor kakovosti lepil. Zahteve se uporabljajo za tipsko preskušanje lepil. Dejavnosti kontrole proizvodnje ne spadajo na področje uporabe tega evropskega standarda.
Lepila, ki izpolnjujejo zahteve tega evropskega standarda, so primerna za uporabo pri nosilnih lesenih konstrukcijah pod pogojem, da je bil postopek vezave izveden v skladu z ustreznim standardom za proizvod.

General Information

Status
Published
Publication Date
31-Oct-2017
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
01-Nov-2017
Completion Date
01-Nov-2017

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SLOVENSKI STANDARD
SIST EN 301:2018
01-februar-2018
1DGRPHãþD
SIST EN 301:2014
Lepila na osnovi fenolov in aminoplastov za nosilne lesene konstrukcije -
Razvrstitev in zahteve za delovanje

Adhesives, phenolic and aminoplastic, for load-bearing timber structures - Classification

and performance requirements

Klebstoffe, Phenoplaste und Aminoplaste, für tragende Holzbauteile - Klassifizierung und

Leistungsanforderungen

Adhésifs de nature phénolique et aminoplaste, pour structures portantes en bois -

Classification et exigences de performance
Ta slovenski standard je istoveten z: EN 301:2017
ICS:
83.180 Lepila Adhesives
91.080.20 Lesene konstrukcije Timber structures
SIST EN 301:2018 en

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

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SIST EN 301:2018
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SIST EN 301:2018
EN 301
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2017
EUROPÄISCHE NORM
ICS 83.180 Supersedes EN 301:2013
English Version
Adhesives, phenolic and aminoplastic, for load-bearing
timber structures - Classification and performance
requirements

Adhésifs de nature phénolique et aminoplaste, pour Klebstoffe, Phenoplaste und Aminoplaste, für tragende

structures portantes en bois - Classification et Holzbauteile - Klassifizierung und

exigences de performance Leistungsanforderungen
This European Standard was approved by CEN on 16 July 2017.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels

© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 301:2017 E

worldwide for CEN national Members.
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SIST EN 301:2018
EN 301:2017 (E)
Contents Page

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

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

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

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

3 Terms and definitions ................................................................................................................................... 6

4 Classification ..................................................................................................................................................... 7

5 Requirements ................................................................................................................................................ 10

5.1 General ............................................................................................................................................................. 10

5.2 Tensile shear test ......................................................................................................................................... 11

5.3 Delamination test ......................................................................................................................................... 12

5.4 Fibre damage test ......................................................................................................................................... 12

5.5 Shrinkage test ................................................................................................................................................ 13

5.6 Static load test ............................................................................................................................................... 13

5.7 Type testing of separate application finger joint adhesive ........................................................... 13

6 Working properties of the adhesive ...................................................................................................... 13

6.1 General ............................................................................................................................................................. 13

6.2 Physical properties of adhesive prepared for use ........................................................................... 14

6.3 Use of the adhesive ...................................................................................................................................... 14

7 Marking and labelling ................................................................................................................................. 14

Annex A (normative) Delamination test for finger joints with separate spread of adhesive

and hardener ................................................................................................................................................. 15

A.1 Production of the specimens .................................................................................................................... 15

A.2 Testing .............................................................................................................................................................. 15

A.3 Expression of results ................................................................................................................................... 16

Bibliography ................................................................................................................................................................. 17

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SIST EN 301:2018
EN 301:2017 (E)
European foreword

This document (EN 301:2017) 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 May 2018, and conflicting national standards shall be

withdrawn at the latest by May 2018.

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 301:2013.
Compared to EN 301:2013 the following changes have been made:

a) EN 15416-2 is replaced by EN 302-8, Adhesives for load-bearing timber structures — Test methods -

Part 8: Static load test of multiple bond line specimens in compression shear;

b) adhesives tested for working properties according to Clause 6 will be marked with a “w” in the end

of their designation code;

c) provisions for delamination tests on preservative treated softwood, hardwood and other conifers

species;

d) provisions for what to test when systems are used with a range of hardener dosage;

e) provisions for small modifications of already tested adhesives;
f) a new Clause 7 – Marking and labelling has been introduced;
g) Annex A: Delamination test for finger joints more precisely described;
h) Annex A: Expression of results included.

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, Former Yugoslav Republic of Macedonia,

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

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
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SIST EN 301:2018
EN 301:2017 (E)
Introduction

This document is one of a series of standards dealing with phenolic and aminoplastic 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 301), five test methods (EN 302-1, EN 302-2, EN 302-3 and EN 302-4

and EN 302-8) used to assess the performance of adhesives after specified heat and humidity

treatments, and three test methods (EN 302-5, EN 302-6 and EN 302-7) to characterize the working

properties of the adhesive.
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 standard may have a negative

environmental impact. As technological advantages lead to acceptable alternatives for these materials,

they will be eliminated from this standard to the greatest extent possible.

At the end of the test, the user of the standard should take care to carry out an appropriate disposal of

the wastes, according to local regulations.
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SIST EN 301:2018
EN 301:2017 (E)
1 Scope

This European Standard establishes a classification for phenolic and aminoplastic polycondensation

adhesives according to their suitability for use for load-bearing timber structures in defined climatic

exposure conditions, and specifies performance requirements for such adhesives for the factory

manufacture or factory-like manufacturing conditions of load-bearing timber structures only.

This European Standard only specifies the performance of an adhesive for use in an environment

corresponding to the defined conditions.

The performance requirements of this European Standard apply to the adhesive only, not to the timber

structure. This European Standard does not cover the performance of adhesives for on-site gluing

(except for factory-like conditions) nor the production of wood-based panels, except solid wood panels,

or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. such

as acetylated wood, heat treated wood and polymer impregnated wood.

This European Standard is primarily intended for the use of adhesive manufacturers and for the use in

timber structures bonded with adhesives, to assess or control the quality of adhesives. The

requirements apply to the type testing of the adhesives. Production control activities are outside the

scope of this European Standard.

Adhesives meeting the requirements of this European Standard are adequate for use in a load-bearing

timber structure, provided that the bonding process has been carried out according to an appropriate

product standard.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

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

EN 302-1, Adhesives for load-bearing timber structures - Test methods - Part 1: Determination of

longitudinal tensile shear strength

EN 302-2, Adhesives for load-bearing timber structures - Test methods - Part 2: Determination of

resistance to delamination

EN 302-3, Adhesives for load-bearing timber structures - Test methods - Part 3: Determination of the effect

of acid damage to wood fibres by temperature and humidity cycling on the transverse tensile strength

EN 302-4, Adhesives for load-bearing timber structures - Test methods - Part 4: Determination of the

effects of wood shrinkage on the shear strength

EN 302-8, Adhesives for load-bearing timber structures - Test methods - Part 8: Static load test of multiple

bond line specimens in compression shear

EN 408, Timber structures Structural timber and glued laminated timber Determination of some physical

and mechanical properties
EN 923, Adhesives - Terms and definitions
EN 1245, Adhesives - Determination of pH

EN 1995-1-1:2004, Eurocode 5: Design of timber structures - Part 1-1: General - Common rules and rules

for buildings
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SIST EN 301:2018
EN 301:2017 (E)
EN 12092, Adhesives - Determination of viscosity

EN 13183-2, Moisture content of a piece of sawn timber - Part 2: Estimation by electrical resistance

method

EN 13183-3, Moisture content of a piece of sawn timber - Part 3: Estimation by capacitance method

EN 14080, Timber structures - Glued laminated timber and glued solid timber - Requirements

3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN 923 and the following apply.

3.1
aminoplastic resin

thermosetting synthetic resin derived from a condensation reaction of the –NH groups or –NH2 groups

of amines or amides with aldehydes
3.2
phenolic resin

thermosetting synthetic resin derived from a condensation reaction of a phenol with an aldehyde

3.3
polycondensation adhesive

adhesive mixture made from a resin formed by a polymerisation reaction involving the elimination of

water, usually with a hardener
Note 1 to entry: Such adhesives usually also contain extenders and/or fillers.
3.4
service class 1

climatic conditions characterised by a moisture content in the materials corresponding to a

temperature of 20 °C and the relative humidity of the surrounding air only exceeding 65 % for a few

weeks per year

Note 1 to entry: In service class 1, which comprises typical indoor conditions, the average moisture content in

most softwoods will not exceed 12 %.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3]
3.5
service class 2

climatic conditions characterised by a moisture content in the materials corresponding to a

temperature of 20 °C and the relative humidity of the surrounding air only exceeding 85 % for a few

weeks per year

Note 1 to entry: In service class 2, to which most covered exterior conditions belong, the average moisture

content in most softwoods will not exceed 20 %.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3]
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SIST EN 301:2018
EN 301:2017 (E)
3.6
service class 3
climatic conditions leading to higher moisture contents than in service class 2
Note 1to entry: Exterior conditions typically belong to service class 3.
[SOURCE: EN 1995-1-1:2004, 2.3.1.3, modified – Note 1 to entry has been added.]
3.7
glue line
adhesive layer between the wood members
3.8
thick glue line

glue line of nominal thickness in the range of 0,3 mm to 2,0 mm at the time of bonding

Note 1 to entry: Thick glue lines are achieved by using spacers, grooves or similar devices with a thickness of

0,3 mm to 2,0 mm when two plain members are glued together.
3.9
close contact glue line
glue line of thickness maximum 0,1 mm

Note 1 to entry: Close contact glue line is achieved by pressing together two plane wood members with a

clamping pressure of (0,8 ± 0,1) N/ mm without grooves, spacers or similar devices.

4 Classification

Adhesives (general purpose, finger jointing or gap filling) for structural purposes shall produce joints of

such strength and durability that the integrity of the bond is maintained in the assigned service class

throughout the expected life of the structure.

Two types of adhesive, I and II, are classified according to their suitability for use in different climatic

conditions:
— Type Ι to be used in service classes 1, 2 and 3 (EN 1995-1-1:2004);
— Type ΙΙ to be used in service class 1 only.

NOTE The application of the adhesive types in the different service classes can be restricted by national

regulations applicable at the end use site of the bonded timber structure.

These two types of adhesive are further divided into three subclasses according to the end use:

— General-purpose adhesive (GP) to be used for glue lines between laminations, for finger joints in

laminations and structural timber, and for large finger joints;

— Finger jointing adhesive (FJ) to be used for finger jointing of laminations and structural timber

only;

— Gap filling adhesive (GF) to be used for fibre parallel gluing, e.g. glue lines between glulam

components of block-glued glulam and for large finger joints. Gap filling adhesives can in addition

be classified as application type GP usable for glue lines between laminations and for finger jointing

of laminations and structural timber.
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SIST EN 301:2018
EN 301:2017 (E)

Table 1 specifies the thirteen adhesive classes for which this European Standard applies and their

designations. The designations consist of:
— type: Ι or ΙΙ;
— application: GP, FJ or GF;

— maximum test temperature in degrees Celsius: 70 or 90 for type Ι, or maximum use temperature in

degrees Celsius: 50 for type ΙΙ;

— use: M for mixed application, and S for separate application of adhesive and hardener.

Each application area and use shall be part of the designation.

EXAMPLE EN 301 I 70 GP 0,6M and EN 301 I 70 FJ 0,1S if classified as general purpose adhesive for mixed

application and classified as finger joint adhesive for separate application.
Table 1 — Adhesive classes
Adhesive type Application
Max. glue line
Max. test Service
thickness
Designation
c a
temp. classes
°C Test Use
Face lamination and finger
jointing for general use
EN 301 I 70 GP 0,6M General purpose 70 1,0 0,6 1,2,3
EN 301 I 70 GP 0,3S General purpose 70 1,0 0,3 1,2,3
Speci
...

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