Rubber, raw natural — Determination of the gel content of technically specified rubber (TSR)

This document specifies a method for the determination of gel content for technically specified rubbers (TSR).

Caoutchouc naturel brut — Détermination de la teneur en gel des caoutchoucs spécifiés techniquement (TSR)

General Information

Status
Published
Publication Date
29-Apr-2020
Current Stage
6060 - International Standard published
Start Date
21-Mar-2020
Completion Date
30-Apr-2020
Ref Project

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ISO 17278:2020 - Rubber, raw natural -- Determination of the gel content of technically specified rubber (TSR)
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INTERNATIONAL ISO
STANDARD 17278
Second edition
2020-04
Rubber, raw natural — Determination
of the gel content of technically
specified rubber (TSR)
Caoutchouc naturel brut — Détermination de la teneur en gel des
caoutchoucs spécifiés techniquement (TSR)
Reference number
ISO 17278:2020(E)
ISO 2020
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ISO 17278:2020(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

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below or ISO’s member body in the country of the requester.
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Published in Switzerland
ii © ISO 2020 – All rights reserved
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ISO 17278:2020(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Principle ........................................................................................................................................................................................................................ 1

5 Reagent ........................................................................................................................................................................................................................... 1

6 Apparatus ..................................................................................................................................................................................................................... 2

7 Conditions.................................................................................................................................................................................................................... 2

8 Procedure..................................................................................................................................................................................................................... 2

8.1 Number of test samples ................................................................................................................................................................... 2

8.2 Procedure .................................................................................................................................................................................................... 2

9 Expression of the result................................................................................................................................................................................. 3

10 Precision ....................................................................................................................................................................................................................... 4

11 Test report ................................................................................................................................................................................................................... 4

Annex A (informative) Precision ............................................................................................................................................................................... 5

Bibliography ................................................................................................................................................................................................................................ 7

© ISO 2020 – All rights reserved iii
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ISO 17278:2020(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 45, Rubber and rubber products,

Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.

This second edition cancels and replaces the first edition (ISO 17278:2013), which has been technically

revised.
The main changes compared to the previous edition are as follows:

— to solve the ambiguity with the scope, the term “LoV-TSR sample” in Clause 4 has been replaced by

the term “TSR sample”;
— in 8.1, the words “two samples” have been replaced by “two test samples”;
— in 5.2, acetone has 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 © ISO 2020 – All rights reserved
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INTERNATIONAL STANDARD ISO 17278:2020(E)
Rubber, raw natural — Determination of the gel content of
technically specified rubber (TSR)

WARNING — Persons using this document should be familiar with normal laboratory practice.

This document does not purport to address all of the safety problems, if any, associated with its

use. It is the responsibility of the user to establish appropriate safety and health practices.

1 Scope

This document specifies a method for the determination of gel content for technically specified

rubbers (TSR).
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 2000:2014, Rubber, raw natural — Guidelines for the specification of technically specified rubber (TSR)

ISO 23529, Rubber — General procedures for preparing and conditioning test pieces for physical test methods

3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

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
technically specified rubber
TSR

natural rubber obtained from the latex of Hevea brasiliensis (typically processed into block rubber), and

having properties complying with the criteria for the grade concerned
4 Principle
A TSR sample is d
...

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