SIST EN ISO 10548:2003

Carbon fibre - Determination of size content (ISO 10548:2002)

ISO 10548 specifies test methods for the determination of the size content of carbon fibre yarn. It is applicable to continuous-filament yarns and staple-fibre yarns.

Kohlenstofffasern - Bestimmung des Präparationsmassenanteils (ISO 10548:2002)

Diese Internationale Norm legt Prüfverfahren zur Bestimmung des Präparationsmassenanteils von Kohlen-stofffasergarn fest. Sie gilt für Filamentgarne und Spinnfasergarne.

Fibres de carbone - Détermination du taux d'ensimage (ISO 10548:2002)

L'ISO 10548 spécifie des méthodes d'essai pour la détermination du taux d'ensimage des fibres de carbone. Elle est applicable aux fils continus et aux fibres discontinues.

Ogljikova vlakna - Določanje masnega deleža kemijske preparacije (ISO 10548:2002)

General Information

• Status: Published
• Publication Date: 30-Nov-2003
• ICS: 59.100.20 - Carbon materials
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2003
• Due Date: 01-Dec-2003
• Completion Date: 01-Dec-2003
• Ref Project: EN ISO 10548:2003 - Carbon fibre - Determination of size content (ISO 10548:2002)

Relations

• Replaces: SIST EN ISO 10548:1999 - Carbon fibre - Determination of size content (ISO 10548:1994)
• Effective Date: 01-Dec-2003
• Corrected By: SIST EN ISO 10548:2003/AC:2009 - Carbon fibre - Determination of size content (ISO 10548:2002/Cor 1:2008)
• Effective Date: 01-Jun-2009

Overview

SIST EN ISO 10548:2003 is an international standard developed by CEN and ISO that specifies precise test methods for determining the size content of carbon fibre yarns. This standard applies to both continuous-filament yarns and staple-fibre yarns used in various industrial applications. The standard outlines three main analytical methods for assessing sizing - solvent extraction, chemical digestion, and pyrolysis – providing a comprehensive framework for quality control and material specification in carbon fibre production.

Keywords: carbon fibre, size content, sizing determination, yarn testing, solvent extraction, chemical digestion, pyrolysis, continuous-filament yarns, staple-fibre yarns, quality control.

Key Topics

• Scope and Applicability:
  SIST EN ISO 10548:2003 applies to carbon fibre yarns, including continuous-filament yarns and staple-fibre yarns. It is intended for industries requiring accurate measurement of size, a material applied to fibres to aid handling and processing.

• Definition of Size Content:
  Size content is defined as the percentage by mass of the sizing material present on carbon fibre yarn, relative to the total mass of the sized yarn.

• Test Methods:
  The standard encompasses three distinct methods for sizing determination:

  • Method A – Solvent Extraction: Uses Soxhlet extraction to dissolve and remove the size, suitable when the sizing is fully soluble in an appropriate solvent.
  • Method B – Chemical Digestion: Utilizes a chemical mixture of sulfuric acid and hydrogen peroxide to digest partially hardened sizes not soluble in solvents.
  • Method C – Pyrolysis: Employs thermal decomposition in a nitrogen atmosphere, ideal for sizes that can be fully decomposed by pyrolysis.

• Specimen Handling and Conditioning:
  Proper sample preparation involves drying and conditioning specimens to laboratory temperature, with careful handling to avoid damage, ensuring accurate mass measurements before and after size removal.

• Precision and Reporting:
  Multiple test specimens are required for each sample, with results calculated based on average mass differences pre- and post-extraction/digestion/pyrolysis. Detailed test reports are necessary to maintain transparency and reproducibility.

Applications

• Quality Control in Carbon Fibre Manufacturing:
  Manufacturers rely on SIST EN ISO 10548:2003 to consistently measure the amount of sizing material on carbon fibres, critical for ensuring optimal fibre handling properties and compatibility with downstream composite production processes.

• Composite Material Production:
  Precise sizing content measurement ensures the carbon fibres meet the required standards, directly impacting the performance of carbon fibre-reinforced polymers in aerospace, automotive, renewable energy, and sporting goods industries.

• Research and Development:
  Material scientists and engineers use these standardized test methods to develop new carbon fibre sizings and optimize formulations for enhanced processing or mechanical properties.

• Supplier-Client Compliance:
  Enables uniform communication and verification of sizing content specifications in supply chain agreements, minimizing disputes and ensuring conformity to product standards.

Related Standards

• ISO 1886:1990 – Reinforcement Fibres Sampling:
  Provides sampling plans for receiving fibre batches and is referenced by EN ISO 10548 for lot acceptance and specimen sampling protocols.

• ISO/TC 61 “Plastics” and CEN/TC 249:
  Technical committees responsible for the development and maintenance of standards on plastics and composite reinforcement materials.

• Other Carbon Fibre and Composite Standards:
  While SIST EN ISO 10548:2003 focuses on size content determination, complementary standards address fibre mechanical properties, surface treatments, and composite testing methodologies.

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SIST EN ISO 10548:2003 is essential for professionals working with carbon fibre yarns who require reliable and standardized test methods to determine sizing content. Compliance with this standard ensures improved quality control, product consistency, and optimized performance of carbon fibre materials in diverse industrial sectors.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2003
1DGRPHãþD
SIST EN ISO 10548:1999
2JOMLNRYDYODNQD'RORþDQMHPDVQHJDGHOHåDNHPLMVNHSUHSDUDFLMH,62

Carbon fibre - Determination of size content (ISO 10548:2002)
Kohlenstofffasern - Bestimmung des Präparationsmassenanteils (ISO 10548:2002)
Fibres de carbone - Détermination du taux d'ensimage (ISO 10548:2002)
Ta slovenski standard je istoveten z: EN ISO 10548:2003
ICS:
59.100.20 Ogljikovi materiali Carbon materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10548
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2003
ICS 59.100.20 Supersedes EN ISO 10548:1996
English version
Carbon fibre - Determination of size content (ISO 10548:2002)
Fibres de carbone - Détermination du taux d'ensimage Kohlenstofffasern - Bestimmung des
(ISO 10548:2002) Präparationsmassenanteils (ISO 10548:2002)
This European Standard was approved by CEN on 5 June 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10548:2003 E
worldwide for CEN national Members.

Foreword
The text of ISO 10548:2002 has been prepared by Technical Committee ISO/TC 61 "Plastics” of
the International Organization for Standardization (ISO) and has been taken over as EN ISO
10548:2003 by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held by
IBN.
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 January 2004, and conflicting national
standards shall be withdrawn at the latest by January 2004.
This document supersedes EN ISO 10548:1996.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 10548:2002 has been approved by CEN as EN ISO 10548:2003 without any
modifications.
NOTE Normative references to International Standards are listed in annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 1886 1990 Reinforcement fibres - Sampling EN ISO 1886 1994
plans applicable to received batches
INTERNATIONAL ISO
STANDARD 10548
Second edition
2002-07-15
Carbon fibre — Determination of size
content
Fibres de carbone — Détermination du taux d'ensimage

Reference number
ISO 10548:2002(E)
©
ISO 2002
ISO 10548:2002(E)
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ii ISO 2002 – All rights reserved

ISO 10548:2002(E)
Contents Page
1 Scope . 1
2 Normative reference . 1
3 Terms and definitions . 1
4 Principle . 1
5 Test specimens . 2
6 Conditioning . 2
7 Test methods . 2
7.1 Method A: Solvent extraction . 2
7.2 Method B: Digestion with sulfuric acid and hydrogen peroxide . 4
7.3 Method C: Decomposition by pyrolysis . 7
8 Precision . 8
9 Test report . 8
©
ISO 2002 – All rights reserved iii

ISO 10548:2002(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International Standards is normally carried out through ISO technical
committees. Each member body interested in a subject for which a technical committee has been established has
the right to be represented on that committee. International organizations, governmental and non-governmental, in
liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 10548 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,
Composites and reinforcement fibres.
This second edition cancels and replaces the first edition (ISO 10548:1994), which has been technically revised.
©
iv ISO 2002 – All rights reserved

INTERNATIONAL STANDARD ISO 10548:2002(E)
Carbon fibre — Determination of size content
1 Scope
This International Standard specifies test methods for the determination of the size content of carbon fibre yarn. It is
applicable to continuous-filament yarns and staple-fibre yarns.
2 Normative reference
The following normative document contains provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, this publication do not
apply. However, parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent edition of the normative document indicated below. For undated references,
the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of
currently valid International Standards.
ISO 1886:1990, Reinforcement fibres — Sampling plans applicable to received batches
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.1
size
any material applied to fibres to facilitate the handling and use of the fibres
3.2
size content
mass of the size expressed as a percentage of the sized carbon fibre yarn
4 Principle
Test specimens are weighed before and after removal of the size by one of the following three methods:
— method A: size removal by Soxhlet extraction, to be used when the size is completely soluble in a suitable
solvent;
— method B: size removal by chemical digestion using a mixture of sulfuric acid and hydrogen peroxide, used
when the size is partially hardened and not completely soluble in solvents;
— method C: size decomposition by pyrolysis at high temperature in an atmosphere of nitrogen, used when the
size is completely removed by pyrolysis.
Methods A and B require the last weighing to be made to constant mass by repetition of the final drying and weighing
procedure. In those cases where known materials are being tested regularly, it is permitted to define, by experiment,
a minimum time for drying which will ensure that constant mass has been reached. Particular care may be required
if the carbon fibre or sizing is water-absorbent.
©
ISO 2002 – All rights reserved 1

ISO 10548:2002(E)
5 Test specimens
Two test specimens or more shall be taken from each lot or yarn sample. The size content is taken as the average of
the two or more determinations.
If the determination is carried out for the purpose of lot acceptance, the lot received shall be sampled in accordance
with ISO 1886.
When handling test specimens, gloves shall be worn or tweezers used to avoid damage to the specimens.
NOTE The specification or the person requiring the test may stipulate that additional determinations be carried out at different
places within the elementary unit.
6 Conditioning
Elementary units and yarn samples shall be allowed to attain laboratory tem
...