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SLOVENSKI STANDARD
01-februar-2023
Nadomešča:
SIST EN 2559:2001
Aeronavtika - Predimpregnirana ogljikova, steklena in aramidna vlakna -
Ugotavljanje deleža smole in vlaken ter masa vlaken na enoto površine
Aerospace series - Carbon, glass and aramid fibre preimpregnates - Determination of
the resin and fibre content and the mass of fibre per unit area
Luft- und Raumfahrt - Carbon-, Glas- und Aramidfaser-Prepregs - Bestimmung des Harz-
und Fasermasseanteils und der flächenbezogenen Fasermasse
Série aérospatiale - Préimprégnés de fibres de carbone, de verre et d'aramide -
Détermination des teneurs en résine et en fibres et de la masse surfacique de la fibre
Ta slovenski standard je istoveten z: EN 2559:2022
ICS:
49.025.40 Guma in polimerni materiali Rubber and plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 2559
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2022
EUROPÄISCHE NORM
ICS 49.025.40 Supersedes EN 2559:1997
English Version
Aerospace series - Carbon, glass and aramid fibre
preimpregnates - Determination of the resin and fibre
content and the mass of fibre per unit area
Série aérospatiale - Préimprégnés de fibres de carbone, Luft- und Raumfahrt - Carbon-, Glas- und Aramidfaser-
de verre et d'aramide - Détermination des teneurs en Prepregs - Bestimmung des Harz- und
résine et en fibres et de la masse surfacique de la fibre Fasermasseanteils und der flächenbezogenen
Fasermasse
This European Standard was approved by CEN on 1 August 2022.
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, Türkiye 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
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2559:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle . 4
4.1 Wet extraction (Method A) . 4
4.2 Soxhlet extraction (Method B) . 4
4.3 Extraction by soaking and decantation (Method C) . 4
4.4 Information on the use of the methods . 4
4.4.1 Method A . 4
4.4.2 Method B . 5
4.4.3 Method C . 5
5 Apparatus and reagents . 5
5.1 For all methods . 5
5.2 Method A . 5
5.3 Method B . 6
5.4 Method C . 6
6 Specimens . 6
6.1 Shape and dimensions . 6
6.2 Number and distribution . 6
7 Procedure . 8
7.1 Conditioning . 8
7.1.1 Preimpregnates stored at ambient temperature . 8
7.1.2 Preimpregnates stored below ambient temperature . 8
7.2 Atmosphere for testing . 8
7.3 Time interval between conditioning and testing . 8
7.4 Tests . 8
7.4.1 General. 8
7.4.2 Code A method . 9
7.4.3 Code B method . 9
7.4.4 Code C method. 10
8 Expression of results . 10
8.1 Uncorrected resin content . 10
8.1.1 Method A . 10
8.1.2 Method B . 10
8.1.3 Method C . 11
8.2 Corrected resin content (corrected for volatiles) . 11
8.3 Fibre content . 11
8.4 Mass of fibre per unit area . 12
9 Health and safety requirements . 12
10 Designation . 12
11 Test report . 12
European foreword
This document (EN 2559:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (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 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 2023, and conflicting national standards shall be
withdrawn at the latest by May 2023.
This document supersedes EN 2559:1997.
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.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN website.
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, Türkiye and the
United Kingdom.
1 Scope
This document specifies methods for determining the resin content, fibre content and mass of fibre per
unit area of fibre preimpregnates for aerospace use.
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 2558, Aerospace series — Carbon fibre preimpregnates — Determination of the volatile content
EN 2743, Aerospace series — Fibre reinforced plastics — Standard procedures for conditioning prior to
testing unaged materials
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 /
— IEC Electropedia: available at
4 Principle
4.1 Wet extraction (Method A)
Determination of the difference in mass by means of weighing to constant mass before and after
extraction of the resin by acid digestion. Use a solution of concentrated sulfuric acid and hydrogen
peroxide. Nitric or other suitable acids can be used depending on the matrix that is to be dissolved.
4.2 Soxhlet extraction (Method B)
Determination of the difference in mass by means of weighing to constant mass before and after
extraction of the resin with methyl-ethyl-ketone or other suitable solvent agreed between the user and
manufacturer.
4.3 Extraction by soaking and decantation (Method C)
Similar to 4.2 but faster. In case of dispute, 4.2 shall be applied.
4.4 Information on the use of the methods
4.4.1 Method A
If the preimpregnate contains only fibre and a resin which is completely “digestible”, the resin content
is equal to the loss on wet digestion.
The fibre used as a reinforcement may be coated with a resin size, which is normally removed during
wet digestion. The size is therefore included in the resin content.
Where undissolved fillers are lost by filtering, they are thus included in the resin content.
NOTE There can be a partial loss of undissolved fillers, one part being counted with the resin and the rest
being counted with the fibres.
4.4.2 Method B
Size normally removed during Soxhlet extraction is included in the resin content.
If the resin contains fillers which do not dissolve in the solvent, the resin content does not include these
fillers.
4.4.3 Method C
If the fibre contains a size, this is normally removed during solvent extraction and included in the resin
content.
Where undissolved fillers are lost by decantation, they are thus included in the resin content.
NOTE There can be a partial loss of undissolved fillers, one part being counted with the resin and the rest
being counted with the fibres.
5 Apparatus and reagents
5.1 For all m
...