Characterisation of one component foam - Part 2: Expansion characteristics

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.

Charakterisierung von Einkomponentenschäumen - Teil 2: Ausdehnung

Dieses Dokument legt Prüfverfahren für die Beurteilung der Ausdehnungseigenschaften von feuchtigkeitshärtenden, selbsthärtenden aktivierbaren oder wassertrocknenden Schäumen fest, die aus einzelnen Schaumdruckdosen abgegeben werden.
Dieses Dokument beansprucht nicht, sämtliche mit seiner Anwendung verbundenen Sicherheitsprobleme, soweit diese gegeben sind, zu behandeln. Es liegt in der Verantwortung des Anwenders dieses Dokuments, angemessene Maßnahmen in Bezug auf den Gesundheits  und Arbeitsschutz einzuleiten und die Anwendbarkeit gesetzlicher Anforderungen vor ihrer Anwendung zu ermitteln.
Die folgenden Prüfverfahren werden beschrieben:
-   Verfahren 1 - Dimensionsstabilität: Dieses Prüfverfahren beschreibt, wie die Dimensionsstabilität (Schrumpfen oder Ausdehnung) von ausgehärtetem Schaum unter üblichen und extremen Bedingungen zu ermitteln ist.
-   Verfahren 2 - Härtungsdruck: Dieses Verfahren beschreibt, wie die Druckerzeugung während des Härtungsvorgangs eines Einkomponentenschaums (OCF, en: one component foam) zu ermitteln ist.
-   Verfahren 3 - Nachexpansion: Dieses Verfahren beschreibt, wie die Ausdehnung eines abgegebenen nichtgehärteten Schaums während der Härtungsphase zu messen ist.

Caractérisation des mousses monocomposants - Partie 2 : Caractéristiques d’expansion

Le présent document spécifie des méthodes d’essai permettant d’évaluer les caractéristiques d’expansion des mousses durcissant à l’humidité, des mousses autopolymérisables et des mousses séchant dans l’eau, appliquées à partir de récipients individuels de mousse sous pression.
Le présent document ne prétend pas aborder la totalité des problèmes de sécurité qui pourraient découler de son utilisation. Il est de la responsabilité de l’utilisateur du présent document de respecter des pratiques de sécurité et de santé appropriées et de déterminer l’applicabilité des exigences réglementaires avant son utilisation.
Les méthodes d’essai suivantes sont décrites :
-   Méthode 1 - Stabilité dimensionnelle : cette méthode d’essai permet de déterminer la stabilité dimensionnelle (retrait ou expansion) d’une mousse durcie dans des conditions extrêmes et normales ;
-   Méthode 2 - Pression due au durcissement : cette méthode permet de déterminer la pression générée au cours du processus de durcissement d’une mousse monocomposant ;
-   Méthode 3 - Expansion après application : cette méthode permet de mesurer l’expansion d’une mousse fraîchement appliquée, au cours de la phase de durcissement.

Karakterizacija enokomponentnih pen - 2. del: Razširitvene značilnosti

General Information

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

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SLOVENSKI STANDARD
SIST EN 17333-2:2020
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
SIST EN 17333-2:2020 en,fr,de

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

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SIST EN 17333-2:2020
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SIST EN 17333-2:2020
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.
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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
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

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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
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.
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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
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
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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
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.
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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
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:
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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
Key
1 particle board
2 measuring point
Figure 1 — Marking of measurement points
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SIST EN 17333-2:2020
EN 17333-2:2020 (E)
Key
1 spacer
2 screw clamp
3 particle board
Figure 2 — Assembly of test plates

The spacers are placed at least 5 mm from the side of the particle boards to be able to put the Vernier

caliper between the particle boards. The clamps are used to fix the joints (positioned at each corner or

in line of the spacers).

Fasten the clamps with moderate force to avoid deformation of the particle boards.

If pre-moistened, the clamped particle boards are immersed in water for 20 s, taken out and stored

horizontally for two minutes, until excess water drips off (see Figure 3). The foaming shall be started

within the next 30 s.
Dry and pre-wetted joints shall not
...

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