Textile glass — Staple fibres or filaments — Determination of average diameter

This document specifies three test methods used for determining the average diameter (i.e. the average value of actual diameters) of staple fibres or filaments in a textile glass product.

Verre textile — Fibres discontinues et filaments — Détermination du diamètre moyen

General Information

Status
Published
Publication Date
20-Jan-2022
Current Stage
4099 - Full report circulated: DIS approved for registration as FDIS
Start Date
12-Oct-2021
Completion Date
12-Oct-2021
Ref Project

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ISO 1888:2022 - Textile glass — Staple fibres or filaments — Determination of average diameter Released:1/21/2022
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INTERNATIONAL ISO
STANDARD 1888
Fourth edition
2022-01
Textile glass — Staple fibres or
filaments — Determination of average
diameter
Verre textile — Fibres discontinues et filaments — Détermination du
diamètre moyen
Reference number
ISO 1888:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 1888:2022(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2022

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

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© ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 1888:2022(E)
Contents Page

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

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

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

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

4 Method A: Longitudinal profile ............................................................................................................................................................1

4.1 Principle ....................................................................................................................................................................................................... 1

4.2 Apparatus .................................................................................................................................................................................................... 1

4.3 Procedure .................................................................................................................................................................................................... 2

5 Method B: Transverse section ............................................................................................................................................................... 3

5.1 Principle ....................................................................................................................................................................................................... 3

5.2 Apparatus .................................................................................................................................................................................................... 3

5.3 Procedure .................................................................................................................................................................................................... 4

6 Method C: Determination of the diameter by calculation ........................................................................................ 5

6.1 Principle ....................................................................................................................................................................................................... 5

6.2 Test specimen .......................................................................................................................................................................................... 5

6.3 Procedure .................................................................................................................................................................................................... 6

7 Expression of results ....................................................................................................................................................................................... 6

8 Test report .................................................................................................................................................................................................................. 6

iii
© ISO 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 1888:2022(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.

This fourth edition cancels and replaces the third edition (ISO 1888:2006), which has been technically

revised.
The main changes are as follows:
— “Method C” (determination of the diameter by calculation) 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.
© ISO 2022 – All rights reserved
---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 1888:2022(E)
Textile glass — Staple fibres or filaments — Determination
of average diameter
1 Scope

This document specifies three test methods used for determining the average diameter (i.e. the average

value of actual diameters) of staple fibres or filaments in a textile glass product.

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 1889, Reinforcement yarns — Determination of linear density

ISO 12154, Determination of density by volumetric displacement — Skeleton density by gas pycnometry

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 472 apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
4 Method A: Longitudinal profile
4.1 Principle

Fibres or filaments placed in a liquid medium having a refractive index differing from that of the textile

glass are viewed in profile under a microscope and the diameter measured.
4.2 Apparatus
4.2.1 Microscope, equipped with the following:

— An eye-piece with a built-in micrometer graticule, the eye-piece and objective together giving an

overall magnification of at least ×400 and preferably ×1 000. The resolution of the microscope shall

permit measurement to the nearest 0,5 µm or better.
— A system permitting lateral and rotational movement of the microscope stage.
— An illumination system.
This sys
...

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