EN 301:2017

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

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.

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
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.
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.
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
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]
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.
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
mm
°C Test Use
Face lamination and finger
jointing for general use
d
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
...