Fibre-reinforced plastics - Moulding compounds and prepregs - Determination of mass per unit area and fibre mass per unit area (ISO 10352:2020)

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.

Faserverstärkte Kunststoffe - Formmassen und Prepregs - Bestimmung der flächenbezogenen Masse und flächenbezogenen Fasermasse (ISO 10352:2020)

Dieses Dokument legt ein Verfahren zur Bestimmung der flächenbezogenen Masse fest. Es legt außerdem fünf Verfahren (Verfahren A bis Verfahren E) zur Bestimmung der flächenbezogenen Fasermasse von Formmassen und Prepregs fest. Die fünf Verfahren sind die folgenden:
—   Verfahren A: Soxhlet-Extraktion;
—   Verfahren B: Extraktion durch Eintauchen in ein in einem Becherglas befindliches Lösemittel;
—   Verfahren C: Zersetzung durch Glühverlust;
—   Verfahren D: Extraktion durch Nassverbrennung;
—   Verfahren E: Verfahren durch Berechnung.
Dieses Dokument gilt für die folgenden Arten von Materialien:
—   Formmassen und vorimprägnierte unidirektionale Platten, Bänder, Gewebe und Matten;
—   Prepregs, in denen eine beliebige Art der Verstärkung (Aramid, Kohlenstoff, Glas usw.) und eine beliebige Art der Matrix (wärmehärtbar oder thermoplastisch) verwendet wurden.
Gewöhnlich sind Verstärkungsfasern mit Schlichten oder Appreturen beschichtet. Gewöhnlich lösen sich diese mit dem Harz und sind demzufolge im Harzgehalt enthalten.
Dieses Dokument gilt nicht für die folgenden Arten von Prepregs:
—   diejenigen, die Verstärkungen enthalten, die in den zum Auflösen des Harzes verwendeten Lösemitteln löslich (oder teilweise löslich) sind.

Plastiques renforcés de fibres - Détermination de la masse surfacique et de la masse des fibres par unité de surface (ISO 10352:2020)

Le présent document spécifie une méthode pour la détermination de la masse surfacique. Il spécifie également cinq méthodes (Méthode A à Méthode E) pour la détermination de la masse des fibres par unité de surface des mélanges à mouler et des préimprégnés. Les cinq méthodes sont les suivantes:
— Méthode A: Extraction par Soxhlet;
— Méthode B: Extraction par immersion dans du solvant dans un bécher;
— Méthode C: Décomposition par perte au feu;
— Méthode D: Extraction par combustion humide;
— Méthode E: Méthode par calcul.
Le présent document est applicable aux types de matériaux suivants:
— mélanges à mouler et feuilles, rubans, tissus et mats préimprégnés à renfort unidirectionnel;
— préimprégnés, quelle que soit la nature du renfort (aramide, carbone, verre, etc.) et de la matrice (thermodurcissable ou thermoplastique) ayant été utilisés.
Les fibres de renforcement sont généralement revêtues d'un ensimage ou de produits de finition. Ceux-ci se dissolvent normalement dans la résine et sont donc inclus dans la teneur en résine.
Le présent document n'est pas applicable aux types de préimprégnés suivants:
— ceux contenant des renforcements qui sont solubles (ou partiellement solubles) dans les solvants utilisés pour dissoudre la résine.

Z vlakni ojačeni polimerni materiali - Zmesi za oblikovanje in preimpregniranje - Ugotavljanje mase na enoto površine in mase vlaken na enoto površine (ISO 10352:2020)

General Information

Status
Published
Public Enquiry End Date
29-Sep-2019
Publication Date
05-Oct-2020
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Oct-2020
Due Date
06-Dec-2020
Completion Date
06-Oct-2020

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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

© ISO 2020 – All rights reserved iii
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SIST EN ISO 10352:2020
ISO 10352:2020(E)

10.1 Mass per unit area .............................................................................................................................................................................13

10.2 Fibre mass per unit area ..............................................................................................................................................................13

11 Test report ................................................................................................................................................................................................................14

iv © ISO 2020 – All rights reserved
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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.
© ISO 2020 – All rights reserved v
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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.

© ISO 2020 – All rights reserved 1
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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.

2 © ISO 2020 – All rights reserved
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SIST EN ISO 10352:2020
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)
© ISO 2020 – All rights reserved 3
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SIST EN ISO 10352:2020
ISO 10352:2020(E)
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;
4 © ISO 2020 – All rights reserved
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SIST EN ISO 10352:2020
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
...

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