SIST EN ISO 1172:2023

Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates - Determination of the textile-glass and mineral-filler content using calcination methods (ISO 1172:2023)

This document specifies two calcination methods for the determination of the textile glass and mineral filler content of glass-reinforced plastics:
—     Method A: for the determination of the textile glass content when no mineral fillers are present.
—     Method B: for the determination of the textile-glass and mineral-filler content when both components are present.
This document is applicable to the following types of material:
—     prepregs made from yarns, rovings, tapes or fabrics;
—     SMC, BMC and DMC moulding compounds;
—     textile-glass-reinforced thermoplastic moulding materials and granules;
—     filled or unfilled textile-glass laminates made with thermosetting or thermoplastic resins.
The methods do not apply to the following types of reinforced plastic:
—     those containing reinforcements other than textile glass;
—     those containing materials which do not completely burn off at the test temperature (for example, those based on silicone resin);
—     those containing mineral fillers which degrade at temperatures below the minimum calcination temperature.

Textilglasverstärkte Kunststoffe - Prepregs, Formmassen und Laminate - Bestimmung des Textilglas- und Mineralfüllstoffgehalts mittels Kalzinierungsverfahren (ISO 1172:2023)

Dieses Dokument legt zwei Kalzinierungsverfahren zur Bestimmung des Textilglas- und Mineralfüllstoffgehalts von glasfaserverstärkten Kunststoffen fest:
   Verfahren A: Zur Bestimmung des Textilglasgehalts, falls keine Mineralfüllstoffe vorhanden sind.
   Verfahren B: Zur Bestimmung des Textilglas- und Mineralfüllstoffgehalts, wenn beide Bestandteile vorhanden sind.
Dieses Dokument ist auf folgende Materialarten anwendbar:
   Prepregs aus Fäden, Rovings, Bändern oder Geweben;
   SMC-, BMC- und DMC-Formmassen;
   textilglasverstärkte thermoplastische Formmassen und Granulate;
   gefüllte und ungefüllte Textilglaslaminate aus wärmehärtbaren oder thermoplastischen Harzen.
Die Verfahren sind auf folgende Arten von verstärkten Kunststoffen nicht anwendbar:
   verstärkte Kunststoffe mit anderen Verstärkungsmaterialien als Textilglas;
   verstärkte Kunststoffe, die Materialien enthalten, die bei der Prüftemperatur nicht vollständig verbrennen (z. B. Kunststoffe auf Silikonharzbasis);
   verstärkte Kunststoffe mit Mineralfüllstoffen, die sich bei Temperaturen unter der Mindestkalzinierungstemperatur zersetzen.
ANMERKUNG   Bei diesen Materialien kann ISO 11667 angewendet werden.
WARNUNG — Dieses Dokument enthält keine Einzelheiten von Vorsichtsmaßnahmen, die zur Erfüllung der Anforderungen an den Arbeits- und Gesundheitsschutz getroffen werden sollten. Die beschriebenen Prüfverfahren erfordern die Anwendung hoher Temperaturen und konzentrierter Säuren. Der Anwender dieses Dokuments ist dafür verantwortlich, die entsprechenden Arbeits- und Gesundheitsschutzbestimmungen zu befolgen.

Plastiques renforcés de verre textile - Préimprégnés, compositions de moulage et stratifiés - Détermination des taux de verre textile et de charge minérale par des méthodes calcination (ISO 1172:2023)

Le présent document spécifie deux méthodes par calcination pour la détermination des taux de verre textile et de charge minérale des plastiques renforcés de fibres de verre:
—     Méthode A: pour la détermination du taux de verre textile en l’absence de charges minérales.
—     Méthode B: pour la détermination du taux de verre textile et du taux de charge minérale en présence des deux composants.
Le présent document est applicable aux types de matériaux suivants:
—     préimprégnés à base de fils, stratifils, rubans ou tissus;
—     compositions de moulage: BMC, SMC, DMC;
—     compositions de moulage et granulés de thermoplastiques renforcés de verre textile;
—     stratifiés renforcés de verre textile tissé ou non tissé à base de résines thermodurcissables ou thermoplastiques.
Les méthodes ne sont pas applicables aux plastiques renforcés des types suivants:
—     ceux contenant des renforts autres que le verre textile;
—     ceux contenant certains matériaux qui ne se décomposent pas complètement à la température d’essai (par exemple ceux à base de résine silicone);
—     ceux contenant des charges minérales qui se dégradent à une température inférieure à la température minimale de calcination.
NOTE            Pour ces matériaux, l’ISO 11667 peut être utilisée.

S stekleno tkanino ojačani polimerni materiali - Preprege, zmesi za oblikovanje in laminati - Določevanje steklene tkanine in mineralnih polnil z uporabo metode s sežigom (ISO 1172:2023)

Podaja dve metodi s sežigom za določevanje steklene tkanine in mineralnih polnil v s steklom ojačanih polimernih materialih. Metoda A se uporablja za določevanje steklene tkanine, kadar mineralna polnila niso prisotna; metoda B se uporablja, kadar sta prisotni obe komponenti. Nadomešča prvo izdajo.

General Information

• Status: Published
• Public Enquiry End Date: 09-Jan-2023
• Publication Date: 25-Sep-2023
• ICS: 83.120 - Reinforced plastics
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 18-Sep-2023
• Due Date: 23-Nov-2023
• Completion Date: 26-Sep-2023
• Ref Project: EN ISO 1172:2023 - Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates - Determination of the textile-glass and mineral-filler content using calcination methods (ISO 1172:2023)

Relations

• Revised: SIST EN ISO 1172:2000 - Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates - Determination of the textile-glass and mineral-filler content - Calcination methods (ISO 1172:1996)
• Effective Date: 19-Jan-2023

Overview

EN ISO 1172:2023 specifies standardized calcination methods for determining the textile‑glass and mineral‑filler content in textile‑glass‑reinforced plastics. Published by CEN/ISO, it covers two methods:

• Method A - determination of textile‑glass content when no mineral fillers are present.
• Method B - determination of both textile‑glass and mineral‑filler content when both are present.

This applies to prepregs, SMC/BMC/DMC moulding compounds, textile‑glass‑reinforced thermoplastics and granules, and filled/unfilled laminates made with thermosetting or thermoplastic resins. The standard excludes composites with non‑textile glass reinforcements, materials that do not fully combust at the test temperature (e.g., silicone‑based resins), or fillers that degrade below the minimum calcination temperature.

Key topics and requirements

• Principle: weigh a test specimen, calcinate at the specified temperature, reweigh to determine non‑combustible residue (glass + filler).
• Method A: direct calculation of glass content from mass loss when no mineral fillers are present.
• Method B: after calcination, separate glass from mineral filler by dissolving the filler in hydrochloric acid and reweighing to quantify glass and filler individually.
• Sampling and repeatability: testing on parallel specimens (minimum two, add third if results differ by >5 %) and reporting the average.
• Constant mass requirement: repeated calcination/drying cycles until mass stabilizes for accurate results.
• Limitations: methods are not suitable for composites with degradable fillers or incompletely combustible resins.
• Safety: procedures involve high temperatures and concentrated acids - appropriate health and safety measures are required.

Practical applications

• Quality control and acceptance testing of prepregs, moulding compounds (SMC/BMC/DMC), and glass‑reinforced laminates.
• Verifying material composition for production batches and incoming raw materials.
• Supporting material data sheets and supplier declarations with quantified glass and filler contents.
• Research & development and failure analysis where accurate constituent quantification is needed.

Who should use EN ISO 1172:2023

• Composite manufacturers and processors
• Materials testing laboratories and quality assurance teams
• Product engineers and materials scientists working with glass‑reinforced plastics
• Regulatory and certification bodies that require standardized compositional data

Related standards

• ISO 11667 - alternative methods for certain materials (not suitable under EN ISO 1172 conditions).
• ISO 8604 and ISO 472 - normative references for terms and vocabulary used in this standard.

Keywords: EN ISO 1172:2023, textile‑glass‑reinforced plastics, calcination methods, Method A, Method B, glass content, mineral filler, prepregs, SMC BMC DMC, laminate testing, determination.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2023
S stekleno tkanino ojačani polimerni materiali - Preprege, zmesi za oblikovanje in
laminati - Določevanje steklene tkanine in mineralnih polnil z uporabo metode s
sežigom (ISO 1172:2023)
Textile-glass-reinforced plastics - Prepregs, moulding compounds and laminates -
Determination of the textile-glass and mineral-filler content using calcination methods
(ISO 1172:2023)
Textilglasverstärkte Kunststoffe - Prepregs, Formmassen und Laminate - Bestimmung
des Textilglas- und Mineralfüllstoffgehalts mittels Kalzinierungsverfahren (ISO
1172:2023)
Plastiques renforcés de verre textile - Préimprégnés, compositions de moulage et
stratifiés - Détermination des taux de verre textile et de charge minérale par des
méthodes calcination (ISO 1172:2023)
Ta slovenski standard je istoveten z: EN ISO 1172:2023
ICS:
83.120 Ojačani polimeri Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 1172
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2023
EUROPÄISCHE NORM
ICS 83.120 Supersedes EN ISO 1172:1998
English Version
Textile-glass-reinforced plastics - Prepregs, moulding
compounds and laminates - Determination of the textile-
glass and mineral-filler content using calcination methods
(ISO 1172:2023)
Plastiques renforcés de verre textile - Préimprégnés, Textilglasverstärkte Kunststoffe - Prepregs,
compositions de moulage et stratifiés - Détermination Formmassen und Laminate - Bestimmung des
des taux de verre textile et de charge minérale par des Textilglas- und Mineralfüllstoffgehalts mittels
méthodes calcination (ISO 1172:2023) Kalzinierungsverfahren (ISO 1172:2023))
This European Standard was approved by CEN on 1 September 2023.

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
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 1172:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 1172:2023) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by SIS.
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 March 2024, and conflicting national standards shall
be withdrawn at the latest by March 2024.
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 supersedes EN ISO 1172:1998.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations 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.
Endorsement notice
The text of ISO 1172:2023 has been approved by CEN as EN ISO 1172:2023 without any modification.

INTERNATIONAL ISO
STANDARD 1172
Third edition
2023-08
Textile-glass-reinforced plastics —
Prepregs, moulding compounds and
laminates — Determination of the
textile-glass and mineral-filler content
using calcination methods
Plastiques renforcés de verre textile — Préimprégnés, compositions de
moulage et stratifiés — Détermination des taux de verre textile et de
charge minérale par des méthodes calcination
Reference number
ISO 1172:2023(E)
ISO 1172:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 1172:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Sampling . 2
6 Preparation of test specimens . 2
7 Determination . 3
7.1 General . 3
7.2 Method A . 3
7.2.1 Reagents . 3
7.2.2 Apparatus . 3
7.2.3 Procedure . 3
7.2.4 Expression of results . 4
7.3 Method B . 4
7.3.1 Reagents . 4
7.3.2 Apparatus . 5
7.3.3 Procedure . 5
7.3.4 Expression of results . 6
8 Precision . 7
9 Test report . 7
Annex A (informative) Alternative method of separating chopped glass fibre from mineral
filler . 8
Bibliography . 9
iii
ISO 1172:2023(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,
Composites and reinforcement fibres, in collaboration with the European Committee for Standardization
(CEN) Technical Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
This third edition cancels and replaces the second edition (ISO 1172:1996), which has been technically
revised.
The main changes are as follows:
— more detailed definitions of procedures in 7.2 (Method A) have been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
INTERNATIONAL STANDARD ISO 1172:2023(E)
Textile-glass-reinforced plastics — Prepregs, moulding
compounds and laminates — Determination of the textile-
glass and mineral-filler content using calcination methods
WARNING — This document does not give details of the precautions that should be taken to
meet health and safety requirements. The test methods described require the use of high
temperatures and concentrated acids. It is the responsibility of the user of this document to
follow the appropriate health and safety procedures.
1 Scope
This document specifies two calcination methods for the determination of the textile glass and mineral
filler content of glass-reinforced plastics:
— Method A: for the determination of the textile glass content when no mineral fillers are present.
— Method B: for the determination of the textile-glass and mineral-filler content when both components
are present.
This document is applicable to the following types of material:
— prepregs made from yarns, rovings, tapes or fabrics;
— SMC, BMC and DMC moulding compounds;
— textile-glass-reinforced thermoplastic moulding materials and granules;
— filled or unfilled textile-glass laminates made with thermosetting or thermoplastic resins.
The methods do not apply to the following types of reinforced plastic:
— those containing reinforcements other than textile glass;
— those containing materials which do not completely burn off at the test temperature (for example,
those based on silicone resin);
— those containing mineral fillers which degrade at temperatures below the minimum calcination
temperature.
NOTE For these materials, ISO 11667 can be used.
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.
ISO 472, Plastics — Vocabulary
ISO 8604, Plastics — Prepregs
...