SIST EN ISO 10352:2020

SLOVENSKI STANDARD
SIST EN ISO 10352:2020
01-december-2020
Nadomešča:
SIST EN ISO 10352:2011
Z vlakni ojačeni polimerni materiali - Zmesi za oblikovanje in preimpregniranje -
Ugotavljanje mase na enoto površine in mase vlaken na enoto površine (ISO
10352:2020)
Fibre-reinforced plastics - Moulding compounds and prepregs - Determination of mass
per unit area and fibre mass per unit area (ISO 10352:2020)
Faserverstärkte Kunststoffe - Formmassen und Prepregs - Bestimmung der
flächenbezogenen Masse und flächenbezogenen Fasermasse (ISO 10352:2020)
Plastiques renforcés de fibres - Détermination de la masse surfacique et de la masse
des fibres par unité de surface (ISO 10352:2020)
Ta slovenski standard je istoveten z: EN ISO 10352:2020
ICS:
17.060 Merjenje prostornine, mase, Measurement of volume,
gostote, viskoznosti mass, density, viscosity
83.120 Ojačani polimeri Reinforced plastics
SIST EN ISO 10352:2020 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 10352:2020

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SIST EN ISO 10352:2020


EN ISO 10352
EUROPEAN STANDARD

NORME EUROPÉENNE

September 2020
EUROPÄISCHE NORM
ICS 83.120 Supersedes EN ISO 10352:2010
English Version

Fibre-reinforced plastics - Moulding compounds and
prepregs - Determination of mass per unit area and fibre
mass per unit area (ISO 10352:2020)
Plastiques renforcés de fibres - Mélanges à mouler et Faserverstärkte Kunststoffe - Formmassen und
préimprégnés - Détermination de la masse surfacique Prepregs - Bestimmung der flächenbezogenen Masse
et de la masse des fibres par unité de surface (ISO und flächenbezogenen Fasermasse (ISO 10352:2020)
10352:2020)
This European Standard was approved by CEN on 28 August 2020.

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 ISO 10352:2020 E
worldwide for CEN national Members.

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SIST EN ISO 10352:2020
EN ISO 10352:2020 (E)
Contents Page
European foreword . 3

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SIST EN ISO 10352:2020
EN ISO 10352:2020 (E)
European foreword
This document (EN ISO 10352:2020) 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
NBN.
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 2021, and conflicting national standards shall
be withdrawn at the latest by March 2021.
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 10352:2010.
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, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 10352:2020 has been approved by CEN as EN ISO 10352:2020 without any modification.


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SIST EN ISO 10352:2020

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SIST EN ISO 10352:2020
INTERNATIONAL ISO
STANDARD 10352
Fourth edition
2020-08
Fibre-reinforced plastics — Moulding
compounds and prepregs —
Determination of mass per unit area
and fibre mass per unit area
Plastiques renforcés de fibres — Mélanges à mouler et préimprégnés
— Détermination de la masse surfacique et de la masse des fibres par
unité de surface
Reference number
ISO 10352:2020(E)
©
ISO 2020

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SIST EN ISO 10352:2020
ISO 10352:2020(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2020
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: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

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SIST EN ISO 10352:2020
ISO 10352:2020(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
4.1 Determination of mass per unit area . 2
4.2 Determination of fibre mass per unit area . 2
4.2.1 Method A: Extraction in Soxhlet-type apparatus . 2
4.2.2 Method B: Extraction by immersion in solvent in a beaker . 2
4.2.3 Method C: Decomposition by loss on ignition . 2
4.2.4 Method D: Extraction by wet combustion. 2
4.2.5 Method E: Method by calculation . 2
5 Apparatus and reagents . 3
5.1 General . 3
5.2 For Method A . 3
5.3 For Method B . 3
5.4 For Method C . 4
5.5 For Method D . 4
6 Conditioning and testing . 4
6.1 Conditioning . 4
6.1.1 Materials for which no conditioning is required . 4
6.1.2 Conditioning of material stored at ambient temperature . 5
6.1.3 Conditioning of material stored at below ambient temperature . 5
6.2 Testing . 5
6.2.1 Test atmosphere . 5
6.2.2 Time interval between conditioning and testing . 5
7 Test specimens. 5
7.1 Shape and dimensions . 5
7.2 Number . 6
7.3 Preparation . 6
8 Procedure. 8
8.1 Determination of mass per unit area . 8
8.1.1 Materials made without using a solvent . 8
8.1.2 Materials made using a solvent . 8
8.2 Determination of fibre mass per unit area . 9
8.2.1 Method A: Extraction in Soxhlet-type apparatus . 9
8.2.2 Method B: Extraction by immersion in solvent . 9
8.2.3 Method C: Decomposition by loss on ignition . 9
8.2.4 Method D: Extraction by wet combustion.10
8.2.5 Method E: Method by calculation .11
9 Expression of results .11
9.1 Mass per unit area .11
9.1.1 Materials made without using a solvent .11
9.1.2 Materials made using a solvent .11
9.2 Fibre mass per unit area .12
9.2.1 Method A: Extraction in Soxhlet-type apparatus .12
9.2.2 Method B: Extraction by immersion in solvent .12
9.2.3 Method C: Extraction by decomposition by loss on ignition.12
9.2.4 Method D: Extraction by wet combustion.13
9.2.5 Method E: Method by calculation .13
10 Precision .13
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10.1 Mass per unit area .13
10.2 Fibre mass per unit area .13
11 Test report .14
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SIST EN ISO 10352:2020
ISO 10352:2020(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 documents 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).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
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 fourth edition cancels and replaces the third edition (ISO 10352:2010), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— determination of fibre mass per unit area by Method A, Method B, Method C, Method D and Method
E 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.
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SIST EN ISO 10352:2020

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SIST EN ISO 10352:2020
INTERNATIONAL STANDARD ISO 10352:2020(E)
Fibre-reinforced plastics — Moulding compounds and
prepregs — Determination of mass per unit area and fibre
mass per unit area
1 Scope
This document specifies a method for the determination of the mass per unit area. It also specifies five
methods (Method A to Method E) for the determination of the fibre mass per unit area of moulding
compounds and prepregs. The five methods are as follows:
— Method A: Extraction by Soxhlet;
— Method B: Extraction by immersion in solvent in a beaker;
— Method C: Decomposition by loss ignition;
— Method D: Extraction by wet combustion;
— Method E: Method by calculation.
This document is applicable to the following types of materials:
— moulding compound and preimpregnated unidirectional sheet, tape, fabric and mats;
— prepregs in which any type of reinforcement (aramid, carbon, glass, etc.) and any type of matrix
(thermosetting or thermoplastic) has been used.
Typically, reinforcement fibres are coated with sizing or finishes. These normally dissolve with the
resin and are, therefore, included in the resin content.
This document is not applicable to the following types of prepregs:
— those containing reinforcements which are soluble (or partly soluble) in the solvents used to dissolve
the resin.
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 291, Plastics — Standard atmospheres for conditioning and testing
ISO 472, Plastics — Vocabulary
ISO 1889, Reinforcement yarns — Determination of linear density
ISO 4602, Reinforcements — Woven fabrics — Determination of number of yarns per unit length of warp
and weft
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and the following apply.
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SIST EN ISO 10352:2020
ISO 10352:2020(E)

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
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
elementary unit
individual sample roll, sheet or pack which is intended for the measurement of the mass per unit area
using this document
Note 1 to entry: Prepregs are usually supplied in rolls or in packs of sheets. In this context, an individual roll or
pack of sheets is an elementary unit.
3.2
laboratory sample
sample taken from an elementary unit (3.1)
3.3
test specimen
specimen cut from a laboratory sample (3.2)
4 Principle
4.1 Determination of mass per unit area
The mass of a test specimen of known area is determined. Two different specimen sizes are specified,
depending on the type of material. If the material has been manufactured using a solvent or if the
volatile-matter content of the material is not negligible, the sample is conditioned in a specified
atmosphere before test specimens are taken. The result is expressed as the mass per unit area.
4.2 Determination of fibre mass per unit area
4.2.1 Method A: Extraction in Soxhlet-type apparatus
Determination of mass by means of weighing to constant mass after extraction of the resin with suitable
solvent in a Soxhlet-type apparatus. Solvent to use shall be able to extract all the resin component
completely from the specimen.
4.2.2 Method B: Extraction by immersion in solvent in a beaker
Method B is similar to Method A (see 4.2.1) but faster. In case of dispute, Method A shall be applied.
4.2.3 Method C: Decomposition by loss on ignition
Determination of mass by means of weighing to constant mass after decomposition of the resin by
ignition.
4.2.4 Method D: Extraction by wet combustion
Determination of mass by means of weighing to constant mass after extraction of the resin by acid
digestion. Use a solution of concentrated sulphuric acid and hydrogen peroxide.
4.2.5 Method E: Method by calculation
If the linear density (in accordance with ISO 1889) and the number of yarns per unit (in accordance
with ISO 4602) in use is known, the fibre mass per unit area can be simply calculated.
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ISO 10352:2020(E)

5 Apparatus and reagents
5.1 General
Normal laboratory equipment is required plus the following specific apparatus.
5.1.1 Balance, graduated in tenths of 0,1 mg and an accuracy of 0,5 mg.
5.1.2 Square template, with the dimensions given in Table 1 for the material being tested, with an
accuracy of 0,1 mm on the length of each side.
5.1.3 Ancillary items, such as a sharp cutting tool and tweezers.
5.1.4 Desiccator, with containing a suitable drying agent (for example silica gel, calcium chloride or
phosphorus pentoxide).
5.2 For Method A
5.2.1 Single thickness extraction thimble, nominal diameter 20 mm to 22 mm, nominal length
60 mm to 80 mm.
5.2.2 Electric oven, capable of maintaining a temperature of 105 °C with an accuracy of 5 °C.
5.2.3 Extraction apparatus of the Soxhlet type, comprising a condenser, siphon tube and flask and
provided with an electric heating mantle.
5.2.4 Suitable solvent for extraction, (analytical grade), solvent to use shall be able to extract all the
resin component completely from the specimen.
NOTE 1 General solvent is methyl-ethyl-ketone (MEK), tetra-hydro-furan (THF), acetone, N-methyl-
pyrrolidone (NMP), denatured ethanol and others.
NOTE 2 Other solvents or the combination of more than one solvent can be used in order to extract the full all
of the resin component from the specimen.
5.3 For Method B
5.3.1 Container 400 ml, Erlenmeyer flask or beaker.
5.3.2 Electric oven, capable of maintaining a temperature of 105 °C with an accuracy of 5 °C.
5.3.3 Suitable solvent for extraction, (analytical grade) solvent to use shall be able to extract all the
resin component completely from the specimen.
NOTE 1 General solvent is methyl-ethyl-ketone (MEK), tetra-hydro-furan (THF), acetone, N-methyl-
pyrrolidone (NMP), denatured ethanol and others.
NOTE 2 Other solvents or the combination of more than one solvent can be used in order to extract the full all
of the resin component from the specimen.
5.3.4 Acetone (propanone)
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5.4 For Method C
5.4.1 Crucible from porcelain or equivalent properties, with a capacity sufficient to completely
contain the specimen.
5.4.2 Electric oven, capable of maintaining a temperature of 105 °C with an accuracy of 5 °C.
5.4.3 Muffle designed electric furnace, capable of maintaining a temperature of 565 °C with an
accuracy of 30 °C.
5.4.4 Bunsen flame.
5.4.5 Heatproof gloves and safety screen for eye protection.
5.4.6 Laboratory exhausts fan and/or ventilation system.
5.5 For Method D
5.5.1 Erlenmeyer 250 ml double necked, pear-shaped flask, with 50 ml dropping funnel equipped
with air inlet and a water pump.
5.5.2 Heat source, with suitable temperature control.
5.5.3 Container 400 ml, Erlenmeyer flask or beaker.
5.5.4 20 ml sintered glass crucible and suitable filtration assembly.
5.5.5 Electric oven, capable of maintaining a temperature of 105 °C with an accuracy of 5 °C.
5.5.6 Protective equipment, with protective clothing and rubber gloves resistant to hydrogen
peroxide and sulphuric acid solutions, safety screen for eye protection.
5.5.7 Concentrated sulphuric acid, with specific gravity: 1,84 to 1,89.
5.5.8 Hydrogen peroxide solution, with concentration: 300 g/l to 500 g/l.
5.5.9 Acetone (propanone).
5.5.10 Distilled water.
6 Conditioning and testing
6.1 Conditioning
6.1.1 Materials for which no conditioning is required
Conditioning is not required for the following materials:
— those which are known to have been manufactured without using a solvent and to have been stored
under conditions close to standard atmospheric conditions;
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ISO 10352:2020(E)

— those for which the volatile-matter content is known, from test data, to be negligible and which are
known to have been stored under conditions close to standard atmospheric conditions;
— those for which the material specification states that no conditioning is required.
After the laboratory sample has been cut from an elementary unit, the sample shall be covered with a
plastic film.
6.1.2 Conditioning of material stored at ambient temperature
With material which has been stored at ambient temperature, the laboratory sample cut from an
elementary unit shall be conditioned in the same standard atmosphere as that which will be used for
testing (see 6.2.1) for a minimum of 2 h, unless otherwise specified.
The laboratory sample shall be kept covered with its protective films in a solvent-resistant bag.
6.1.3 Conditioning of material stored at below ambient temperature
With material which has been stored at temperatures lower than ambient temperature, the material
(generally an elementary unit), suitably packed in an airtight, solvent-resistant bag to prevent moisture
pick-up, shall be allowed to reach ambient temperature over a period of time determined by the mass of
the package. This time shall not be less than 8 h, and the actual time shall be recorded in the test report.
When the material has reached ambient temperature, the laboratory sample cut from the elementary
unit shall be conditioned in the same standard atmosphere as that which will be used for testing (see
6.2.1) for a minimum of 2 h, unless otherwise specified.
The laboratory sample shall be kept covered with its protective films in a solvent-resistant bag.
6.2 Testing
6.2.1 Test atmosphere
The test shall be carried out in a standard atmosphere as specified in ISO 291.
6.2.2 Time interval between conditioning and testing
6.2.2.1 Materials not requiring conditioning
There is no time-interval requirement for the three categories of material described in 6.1.1.
6.2.2.2 Materials requiring conditioning
After conditioning, the test shall be carried out within 6 h unless otherwise specified, the laboratory
sample being kept in the same standard atmosphere as that which will be used for testing until the test
is carried out (see 6.1.2 or 6.1.3).
7 Test specimens
7.1 Shape and dimensions
The preferred test s
...