Aerospace series - Structural adhesives - Test methods - Part 7: Determination of the flow of adhesive film

This document specifies the test method to determine the flow behaviour of structural adhesives supplied in the form of adhesive films.
This document is applicable:
—   to check the flow behaviour of adhesives;
—   for determining the alteration in flow behaviour of adhesives depending on storage time;
—   for determining environmental influences on flow behaviour.

Luft- und Raumfahrt - Strukturelle Klebstoffe - Prüfverfahren - Teil 7: Bestimmung des Fließverhaltens von Klebfolien

Dieses Dokument legt das Prüfverfahren fest, mit dem das Fließverhalten von strukturellen Klebstoffen bestimmt werden kann, die in Form von Klebfolien geliefert werden.
Dieses Dokument gilt für:
   die Prüfung des Fließverhaltens von Klebstoffen;
   die Bestimmung der Veränderung des Fließverhaltens von Klebstoffen in Abhängigkeit von der Lagerzeit;
   die Bestimmung von Umgebungseinflüssen auf das Fließverhalten.

Série aérospatiale - Système d’adhésifs structuraux - Méthodes d’essai - Partie 7 : Détermination de l’écoulement du film adhésif

Le présent document spécifie la méthode d’essai permettant de déterminer le comportement de l'écoulement des adhésifs structuraux fournis sous forme de films adhésifs.
Ce document est applicable pour :
—   vérifier le comportement de l'écoulement des adhésifs ;
—   déterminer la modification du comportement de l'écoulement des adhésifs en fonction du temps de stockage ;
—   déterminer les influences environnementales sur le comportement de l'écoulement.

Aeronavtika - Konstrukcijska lepila - Preskusna metoda - 7. del: Ugotavljanje pretoka lepilnega filma

General Information

Status
Not Published
Public Enquiry End Date
30-Oct-2025
ICS
49.025.50 - Adhesives
Technical Committee
I13 - Imaginarni 13
Current Stage
4020 - Public enquire (PE) (Adopted Project)
Start Date
21-Aug-2025
Due Date
08-Jan-2026
Completion Date
29-Oct-2025
Ref Project
prEN 2243-7 - Aerospace series - Structural adhesives - Test methods - Part 7: Determination of the flow of adhesive film

Overview

The oSIST prEN 2243-7:2025:2025 standard, published by CEN, specifies the test method for determining the flow behaviour of structural adhesives supplied as adhesive films. It is an essential aerospace series standard focusing on the performance evaluation of adhesive films used in aeronautical manufacturing and maintenance. By defining a precise procedure and measurement techniques, this standard ensures consistent quality and reliable material behaviour under specific curing and environmental conditions.

This standard is applicable for:

  • Checking the flow behaviour of adhesive films,
  • Assessing changes in adhesive flow due to storage duration,
  • Evaluating how environmental factors influence adhesive film flow.

Understanding flow behaviour is critical to optimizing adhesive application processes and ensuring structural integrity in aerospace components.

Key Topics

  • Test Sample Preparation:
    Adhesive films are cut as 38 ± 1 mm diameter samples with protective film intact until testing. Cold-stored samples must reach room temperature prior to testing.

  • Test Apparatus:
    The test uses two smooth, parallel pressure plates made from aluminum or steel equipped with temperature control via thermocouples. Adequate spacing ensures consistent pressure distribution and avoids interference between samples.

  • Test Procedure:
    Samples and apparatus are subjected to a curing cycle matching the adhesive’s material specification-temperature, time, and pressure controlled precisely using an oven, autoclave, or press. Release films are used to prevent adhesion to plates. Testing must occur within 8 hours of room temperature equilibration for cold-stored adhesives.

  • Measurement Methods:
    Flow is determined post-curing by measuring the sample’s diameter or surface area using one of three methods:

    • Method A: Diameter measurement (minimum and maximum) with accuracy of 0.5 mm,
    • Method B: Area measurement using a Compensating Polar Planimeter with 0.25 mm² accuracy,
    • Method C: Digital image analysis via photo software also accurate to 0.25 mm².

  • Flow Calculation:
    Flow percentage is calculated based on initial and final diameters or areas, providing a quantifiable metric of adhesive spread during curing.

  • Reporting:
    Test reports must document all relevant details including adhesive batch, curing cycle parameters, storage conditions, sample data, apparatus description, measured flow values, and notable observations to facilitate traceability and reproducibility.

Applications

  • Aerospace Manufacturing:
    Ensures adhesives used in critical aircraft structures maintain expected flow and cure characteristics for robust bonding and structural reliability.

  • Quality Control:
    Enables manufacturers to monitor adhesive flow changes due to aging or environmental exposure, supporting product consistency over production and storage life.

  • Materials Research:
    Facilitates development of new adhesive formulations by providing standardized data on flow behaviour under specified curing and environmental conditions.

  • Process Optimization:
    Helps tailor curing cycles and pressure application methods to achieve optimal adhesive performance and minimize defects during assembly.

Related Standards

While oSIST prEN 2243-7:2025 focuses on adhesive flow testing, it complements other aerospace adhesive standards such as:

  • prEN 2243-1: General test methods for structural adhesives,
  • prEN 2243-2: Determination of tensile lap shear strength,
  • EN 2243 series: Covering diverse mechanical, environmental, and durability tests relevant for aerospace adhesive validation.

Moreover, general adhesive terminology and testing principles can be cross-referenced with ISO and IEC databases:

These sources, combined with oSIST prEN 2243-7:2025, provide a comprehensive framework for aerospace structural adhesive evaluation.

Keywords: Aerospace structural adhesives, adhesive film flow, adhesive testing methods, curing cycle, aerospace quality control, adhesive flow measurement, oSIST prEN 2243-7:2025, adhesive storage effects, environmental effects on adhesives, adhesive film testing standard.

Frequently Asked Questions

oSIST prEN 2243-7:2025 is a draft published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Structural adhesives - Test methods - Part 7: Determination of the flow of adhesive film". This standard covers: This document specifies the test method to determine the flow behaviour of structural adhesives supplied in the form of adhesive films. This document is applicable: — to check the flow behaviour of adhesives; — for determining the alteration in flow behaviour of adhesives depending on storage time; — for determining environmental influences on flow behaviour.

This document specifies the test method to determine the flow behaviour of structural adhesives supplied in the form of adhesive films. This document is applicable: — to check the flow behaviour of adhesives; — for determining the alteration in flow behaviour of adhesives depending on storage time; — for determining environmental influences on flow behaviour.

oSIST prEN 2243-7:2025 is classified under the following ICS (International Classification for Standards) categories: 49.025.50 - Adhesives. The ICS classification helps identify the subject area and facilitates finding related standards.

oSIST prEN 2243-7:2025 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-oktober-2025
Aeronavtika - Konstrukcijska lepila - Preskusna metoda - 7. del: Ugotavljanje
pretoka lepilnega filma
Aerospace series - Structural adhesives - Test methods - Part 7: Determination of the
flow of adhesive film
Luft- und Raumfahrt - Strukturelle Klebstoffe - Prüfverfahren - Teil 7: Bestimmung des
Fließverhaltens von Klebfolien
Série aérospatiale - Système d’adhésifs structuraux - Méthodes d’essai - Partie 7 :
Détermination de l’écoulement du film adhésif
Ta slovenski standard je istoveten z: prEN 2243-7
ICS:
49.025.50 Lepila Adhesives
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2025
ICS 49.025.50
English Version
Aerospace series - Structural adhesives - Test methods -
Part 7: Determination of the flow of adhesive film
Luft- und Raumfahrt - Strukturelle Klebstoffe -
Prüfverfahren - Teil 7: Bestimmung des
Fließverhaltens von Klebfolien
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ASD-
STAN.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 2243-7:2025 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Manufacture of test samples . 4
5 Apparatus . 4
6 Procedure . 5
7 Flow calculation. 6
7.1 Method A: Measurement of the diameter . 6
7.2 Method B: Measurement of the area with a Compensating Polar Planimeter . 6
7.3 Method C: Measurement of the area with a photo software . 6
8 Designation . 7
9 Test report . 7

European foreword
This document (prEN 2243-7:2025) has been prepared by ASD-STAN.
After enquiries and votes carried out in accordance with the rules of this Association, this document has
received the approval of the National Associations and the Official Services of the member countries of
ASD-STAN, prior to its presentation to CEN.
This document is currently submitted to the CEN Enquiry.
1 Scope
This document specifies the test method to determine the flow behaviour of structural adhesives
supplied in the form of adhesive films.
This document is applicable:
— to check the flow behaviour of adhesives;
— for determining the alteration in flow behaviour of adhesives depending on storage time;
— for determining environmental influences on flow behaviour.
2 Normative references
There are no normative references in this document.
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 Manufacture of test samples
Cold-stored materials shall reach room temperature
...

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