EN 17333-2:2020

SLOVENSKI STANDARD
01-junij-2020
Karakterizacija enokomponentnih pen - 2. del: Razširitvene značilnosti
Characterisation of one component foam - Part 2: Expansion characteristics
Charakterisierung von Einkomponentenschäumen - Teil 2: Ausdehnung
Caractérisation des mousses monocomposants - Partie 2 : Foisonnement
Ta slovenski standard je istoveten z: EN 17333-2:2020
ICS:
83.180 Lepila Adhesives
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 17333-2
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2020
EUROPÄISCHE NORM
ICS 83.180
English Version
Characterisation of one component foam - Part 2:
Expansion characteristics
Caractérisation des mousses monocomposants - Partie Charakterisierung von Einkomponentenschäumen -
2 : Caractéristiques d'expansion Teil 2: Ausdehnung
This European Standard was approved by CEN on 1 December 2019.

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 17333-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Test methods . 5
4.1 Method 1 – Dimensional stability . 5
4.1.1 Principle . 5
4.1.2 Equipment . 6
4.1.3 Sampling . 6
4.1.4 Test procedure . 6
4.1.5 Expression of results . 10
4.1.6 Test report . 11
4.2 Method 2 – Curing pressure . 12
4.2.1 Principle . 12
4.2.2 Equipment . 12
4.2.3 Sampling . 12
4.2.4 Test procedure . 12
4.2.5 Expression of results . 15
4.2.6 Test report . 15
4.3 Method 3 – Post expansion . 16
4.3.1 Principle . 16
4.3.2 Equipment . 16
4.3.3 Sampling . 16
4.3.4 Test procedure . 17
4.3.5 Expression of results . 19
4.3.6 Test report . 20
Annex A (informative) Example of the presentation of the dimensional stability results . 21
Bibliography . 22
European foreword
This document (EN 17333-2:2020) 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 September 2020, and conflicting national standards
shall be withdrawn at the latest by September 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 is one of the product European Standards within the framework series of EN 17333 on
Characterization of one component foam, as follows:
— Part 1: Foam yield characteristics;
— Part 2: Expansion characteristics (this document);
— Part 3: Application;
— Part 4: Mechanical strength;
— Part 5: Insulation.
This document is one of a series of standards which specify test methods for determining the properties
of one component foams (OCFs).
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, Turkey and the
United Kingdom.
1 Scope
This document specifies test methods for the evaluation of the expansion properties for moisture
curing, self-curing activatable or water drying foams dispensed from single pressurized foam
containers.
This document does not purport to address all of the safety concerns, if any, associated with its use. It is
the responsibility of the user of this document to establish appropriate safety and health practices and
determine the applicability of regulatory requirements prior to use.
The following test methods are described:
— Method 1 – Dimensional stability: This test method describes how to determine the dimensional
stability (shrinkage or expansion) of cured foam under typical and extreme conditions.
— Method 2 – Curing pressure: This method describes how to determine the generation of pressure
during the curing process of an OCF.
— Method 3 – Post expansion: This method describes how to measure the expansion of a dispensed
froth during the curing phase.
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.
EN 312, Particleboards - Specifications
EN 923, Adhesives - Terms and definitions
EN 15006, Metal aerosol containers - Aluminium containers - Dimensions of the 25,4 mm aperture
EN 14847, Aerosol containers - Tinplate containers - Dimensions of the 25,4 mm aperture
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 923 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/ui
— IEC Electropedia: available at http://www.electropedia.org/
3.1
one component foam
(OCF)
moisture curing or water drying foam as well as self-curing activatable foam dispensed from a single
pressurised foam container
3.2
pressurised foam container
pressurised can according to EN 14847 and EN 15006
3.3
test container
pressurised can according to EN 14847 and EN 15006 used for testing purposes
3.4
dimensional stability
ability of cured foam to retain its dimensions
3.5
jig dwell time
fixation period
time period between foaming and removing clamps
3.6
fully cured or dried foam
cross-linked foam which reaches its serviceable properties as claimed by the manufacturer
3.7
froth
uncured, freshly dispended foam
3.8
curing pressure
pressure build-up within the dispensed froth during curing phase
3.9
post expansion
increase of the dispensed froth volume during the curing phase
3.10
straw foam
one component or two component foam for the extrusion with an adapter tube
3.11
gun foam
one component foam for the extrusion with a foam application gun
4 Test methods
4.1 Method 1 – Dimensional stability
4.1.1 Principle
The foam is dispensed in the gap between two particle boards. When foam is fully cured, the
dimensional stability of the foam is determined by measurement of the distance between the panels
over several days and weeks.
NOTE Typically OCFs tend to shrink within the first few days after curing due to gas release from the closed
cells. The vanishing propellant leaves an under-pressure in the cells resulting in a shrinking of cell size, therefore
the whole foam shrinks. This effect is usually compensated over several days by the slower permeation of air.
Shrinking foam can affect the sealing of joints by separation from the surfaces or deformation of the
joints. The degree of shrinkage depends not only on the OCF formulation, but also on the environmental
conditions e.g. humidity and/or temperature.
4.1.2 Equipment
For each measurement:
4.1.2.1 Two P3 or P5 particle boards (compliant with EN 312) with dimensions of
200 mm × 100 mm × 10 mm (length × width × thickness).
4.1.2.2 2 spacers, not water absorbing, not adherent (e.g. polyethylene (PE),
polytetrafluoroethylene (PTFE), on which polyurethane (PU) does not adhere), thickness 20 mm, length
90 mm.
4.1.2.3 2 screw clamps.
Further tools:
4.1.2.4 Sharp and clean knife blade.
4.1.2.5 Vernier caliper, with an accuracy of 0,1 mm.
4.1.2.6 Conditioning chamber capable of being controlled at the required temperature and
relative humidity (RH) given in Table 1 and Table 2.
4.1.2.7 Water bath.
4.1.3 Sampling
4.1.3.1 Conditioning
Bring the test container to the test temperature for at least 24 h.
The particle boards shall be stored at test conditions [(23 ± 2) °C and (50 ± 5) % RH] for at least 1 week.
4.1.3.2 Test pieces
One setup consists of two plates and two spacers (see Figure 2). Marks are put on the particle boards
(see Figure 1). At these marks the width will be measured (four reading points per joint).
4.1.4 Test procedure
4.1.4.1 General
It is necessary to carry out at least three measurements to obtain a statistically relevant mean value.
When pre-moistening is required, the particle boards are wetted abundantly (see 4.1.4.2).
Self-curing activatable foams don’t require moistened substrates (see 4.1.4.5).
4.1.4.2 Assembling
The particle board pieces and spacers are put together as follows:
Key
1 particle board
2 measuring point
Figure 1 — Marking of measurement points
Key
1 spacer
...