ISO 3616:2022

Textile glass — Chopped-strand and continuous-filament mats — Determination of average thickness, thickness under load and recovery after compression

This document specifies a method for the determination of the average thickness, the thickness under load and the recovery after compression of chopped-strand and continuous-filament textile-glass mats.

Verre textile — Mats à fils coupés et mats à fils continus — Détermination de l'épaisseur moyenne, de l'épaisseur sous charge et de la recouvrance après compression

La présente Norme internationale spécifie une méthode de détermination de l'épaisseur moyenne, de l'épaisseur sous charge et de la recouvrance après compression de mats de verre textile, à fils coupés et à fils continus.

General Information

• Status: Published
• Publication Date: 18-Dec-2022
• ICS: 59.100.10 - Textile glass materials
• Technical Committee: ISO/TC 61/SC 13 - Composites and reinforcement fibres
• Drafting Committee: ISO/TC 61/SC 13 - Composites and reinforcement fibres
• Current Stage: 6060 - International Standard published
• Start Date: 19-Dec-2022
• Due Date: 05-Oct-2023
• Completion Date: 19-Dec-2022

Relations

• Revises: ISO 3616:2001 - Textile glass — Chopped-strand and continuous-filament mats — Determination of average thickness, thickness under load and recovery after compression
• Effective Date: 06-Jun-2022
• Revises: ISO 3616:2001/Amd 1:2017 - Textile glass — Chopped-strand and continuous-filament mats — Determination of average thickness, thickness under load and recovery after compression — Amendment 1
• Effective Date: 06-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 3616
Third edition
2022-12
Textile glass — Chopped-strand
and continuous-filament mats —
Determination of average thickness,
thickness under load and recovery
after compression
Verre textile — Mats à fils coupés et mats à fils continus —
Détermination de l'épaisseur moyenne, de l'épaisseur sous charge et
de la recouvrance après compression
Reference number
ISO 3616:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 3616:2022(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

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
© ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 3616:2022(E)
Contents Page

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

Introduction .................................................................................................................................................................................................................................v

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

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

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

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

5 Apparatus .................................................................................................................................................................................................................... 2

6 Preparation of test specimens .............................................................................................................................................................. 4

7 Conditioning of test specimens ............................................................................................................................................................ 4

8 Procedure ....................................................................................................................................................................................................................4

9 Calculation and expression of results ........................................................................................................................................... 5

9.1 Average thickness ................................................................................................................................................................................ 5

9.2 Thickness under load ........................................................................................................................................................................ 6

9.3 Recovery after compression ....................................................................................................................................................... 6

10 Test report .................................................................................................................................................................................................................. 7

iii
© ISO 2022 – All rights reserved
---------------------- Page: 3 ----------------------
ISO 3616:2022(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 third edition cancels and replaces the second edition (ISO 3616:2001), which has been technically

revised. It also incorporates the Amendment ISO 3616:2001/Amd. 1:2017.
The main changes are as follows:
— an “Introduction” has been added;

— the sampling method (former Clause 6) has been deleted and subsequent clauses have been

renumbered;

— the duration for conditioning test specimens has been changed to from at least 16 h to at least 2 h.

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 ----------------------
ISO 3616:2022(E)
Introduction

Chopped-strand and continuous-filament mats are mainly used as reinforcement materials for polymer

matrix composites. The average thickness, thickness under load and recovery after compression of the

mat are the most basic parameters provided for the composites process design and the final product

structure and size design.
© ISO 2022 – All rights reserved
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 3616:2022(E)
Textile glass — Chopped-strand and continuous-filament
mats — Determination of average thickness, thickness
under load and recovery after compression
1 Scope

This document specifies a method for the determination of the average thickness, the thickness under

load and the recovery after compression of chopped-strand and continuous-filament textile-glass mats.

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 3374, Reinforcement products — Mats and fabrics — Determination of mass per unit area

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 https:// www .electropedia .org/
3.1
average thickness

thickness of a mat, in millimetres, measured in accordance with the specified method, under a specified

nominal light pressure
Note 1 to entry: The average thickness determined by this met
...

Date: 2022-08-2111-01
ISO/DISPRF 3616:2022(E)
ISO TC 61/SC 13/WG 1
Secretariat: JISC
Textile glass — Chopped-strand and continuous-filament mats — Determination of
average thickness, thickness under load and recovery after compression
---------------------- Page: 1 ----------------------
ISO/DIS 3616:2022(E)
© ISO 2022

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-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
Email: [e-mail]@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland.
ii © ISO 2022 – All rights reserved
ii © ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/DIS 3616:2022(E)
Contents

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

Introduction..................................................................................................................................................................... v

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

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

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

4 Principle ............................................................................................................................................................. 2

5 Apparatus ........................................................................................................................................................... 2

6 Preparation of test specimens .................................................................................................................... 4

7 Conditioning of test specimens .................................................................................................................. 4

8 Procedure ........................................................................................................................................................... 4

9 Calculation and expression of results ...................................................................................................... 5

10 Test report ......................................................................................................................................................... 6

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

Introduction..................................................................................................................................................................... v

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

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

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

4 Principle ............................................................................................................................................................. 2

5 Apparatus ........................................................................................................................................................... 2

6 Preparation of test specimens .................................................................................................................... 6

7 Conditioning of test specimens .................................................................................................................. 6

8 Procedure ........................................................................................................................................................... 6

9 Calculation and expression of results ...................................................................................................... 7

9.1 Average thickness ........................................................................................................................................... 7

9.2 Thickness under load ..................................................................................................................................... 7

9.3 Recovery after compression ........................................................................................................................ 7

10 Test report ......................................................................................................................................................... 8

© ISO 2022 – All rights reserved iii
© ISO 2022 – All rights reserved iii
---------------------- Page: 3 ----------------------
ISO/DIS 3616:2022(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/directiveswww.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/patentswww.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.htmlwww.iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13,

Composites and reinforcement fibres.

This third edition cancels and replaces the second edition (ISO 3616:2001), which has been technically

revised. It also incorporates the Amendment ISO 3616:2001/Amd. 1:2017.
The main changes compared to the previous edition are as follows:
— an “Introduction” has been added;

— the sampling method (former Clause 6) has been deleted and subsequent clauses have been

renumbered;

— the duration for conditioning test specimens has been changed to from at least 16 h to at least 2 h.

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.htmlwww.iso.org/members.html.
iv © ISO 2022 – All rights reserved
iv © ISO 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO/DIS 3616:2022(E)
Introduction

Chopped-strand and continuous-filament mats are mainly used as reinforcement materials for polymer

matrix composites. The average thickness, thickness under load and recovery after compression of the

mat are the most basic parameters provided for the composites process design and the final product

structure and size design.
© ISO 2022 – All rights reserved v
© ISO 2022 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 3616:2022(E)
Textile glass — Chopped-strand and continuous-filament mats —
Determination of average thickness, thickness under load and
recovery after compression
1 Scope

This document specifies a method for the determination of the average thickness, the thickness under

load and the recovery after compression of chopped-strand and continuous-filament textile-glass mats.

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 3374, Reinforcement products — Mats and fabrics — Determination of mass per unit area

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

INTERNATIONAL ISO
STANDARD 3616
Third edition
Textile glass — Chopped-strand
and continuous-filament mats —
Determination of average thickness,
thickness under load and recovery
after compression
Verre textile — Mats à fils coupés et mats à fils continus —
Détermination de l'épaisseur moyenne, de l'épaisseur sous charge et
de la recouvrance après compression
PROOF/ÉPREUVE
Reference number
ISO 3616:2022(E)
© ISO 2022
---------------------- Page: 1 ----------------------
ISO 3616:2022(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

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
PROOF/ÉPREUVE © ISO 2022 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 3616:2022(E)
Contents Page

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

Introduction .................................................................................................................................................................................................................................v

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

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

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

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

5 Apparatus .................................................................................................................................................................................................................... 2

6 Preparation of test specimens .............................................................................................................................................................. 4

7 Conditioning of test specimens ............................................................................................................................................................ 4

8 Procedure ....................................................................................................................................................................................................................4

9 Calculation and expression of results ........................................................................................................................................... 5

9.1 Average thickness ................................................................................................................................................................................ 5

9.2 Thickness under load ........................................................................................................................................................................ 5

9.3 Recovery after compression ....................................................................................................................................................... 6

10 Test report .................................................................................................................................................................................................................. 6

iii
© ISO 2022 – All rights reserved PROOF/ÉPREUVE
---------------------- Page: 3 ----------------------
ISO 3616:2022(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 third edition cancels and replaces the second edition (ISO 3616:2001), which has been technically

revised. It also incorporates the Amendment ISO 3616:2001/Amd. 1:2017.
The main changes are as follows:
— an “Introduction” has been added;

— the sampling method (former Clause 6) has been deleted and subsequent clauses have been

renumbered;

— the duration for conditioning test specimens has been changed to from at least 16 h to at least 2 h.

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.
PROOF/ÉPREUVE © ISO 2022 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 3616:2022(E)
Introduction

Chopped-strand and continuous-filament mats are mainly used as reinforcement materials for polymer

matrix composites. The average thickness, thickness under load and recovery after compression of the

mat are the most basic parameters provided for the composites process design and the final product

structure and size design.
© ISO 2022 – All rights reserved PROOF/ÉPREUVE
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 3616:2022(E)
Textile glass — Chopped-strand and continuous-filament
mats — Determination of average thickness, thickness
under load and recovery after compression
1 Scope

This document specifies a method for the determination of the average thickness, the thickness under

load and the recovery after compression of chopped-strand and continuous-filament textile-glass mats.

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 3374, Reinforcement products — Mats and fabrics — Determination of mass per unit area

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 https:// www .electropedia .org/
3.1
average thickness

thickness of a mat, in millimetres, measured in accordance with the specified method, under a specified

nominal light pressure
Note 1 to entry: The av
...