Printed electronics - Part 202-7: Materials - Printed film - Measurement of peel strength for printed layer on flexible substrate by 90° peel method

IEC 62899-202-7:2021(E) provides a test method to measure the peel strength of a printed layer on a flexible substrate. This method calls for peeling the flexible substrate instead of an additional metal electroplating on the printed layer. The method described in this document can be used to compare the peel strengths of the printed layers on the same flexible substrate and thickness conditions. It can be used when the adhesion between the printed layer and flexible substrate is weaker than any other interface between the printed layer and the adhesive, the adhesive and the panel.

General Information

Status
Published
Publication Date
02-Mar-2021
Technical Committee
Current Stage
PPUB - Publication issued
Completion Date
03-Mar-2021
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IEC 62899-202-7:2021 - Printed electronics - Part 202-7: Materials - Printed film - Measurement of peel strength for printed layer on flexible substrate by 90° peel method
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IEC 62899-202-7
Edition 1.0 2021-03
INTERNATIONAL
STANDARD
colour
inside
Printed electronics –
Part 202-7: Materials – Printed film – Measurement of peel strength for printed
layer on flexible substrate by the 90° peel method
IEC 62899-202-7:2021-03(en)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 62899-202-7
Edition 1.0 2021-03
INTERNATIONAL
STANDARD
colour
inside
Printed electronics –
Part 202-7: Materials – Printed film – Measurement of peel strength for printed
layer on flexible substrate by the 90° peel method
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.035.01; 31.180 ISBN 978-2-8322-9466-6

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 3 ----------------------
– 2 – IEC 62899-202-7:2021  IEC 2021
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms and definitions ...................................................................................................... 6

4 Standard atmospheric conditions ..................................................................................... 7

5 Test sample ..................................................................................................................... 7

5.1 General ................................................................................................................... 7

5.2 Size of test sample ................................................................................................. 7

5.3 Applicability of the method ...................................................................................... 7

6 Testing method and test apparatus .................................................................................. 8

6.1 General ................................................................................................................... 8

6.2 Test apparatus ........................................................................................................ 8

6.3 Test procedure........................................................................................................ 9

7 Data analysis ................................................................................................................. 10

7.1 Peel strength calculation ....................................................................................... 10

7.2 Report of the results ............................................................................................. 10

Bibliography .......................................................................................................................... 12

Figure 1 – Schematic of peel test of the printed layer on a flexible substrate .......................... 8

Figure 2 – Apparatus for peel test of the printed layer on a flexible substrate .......................... 9

Figure 3 – Typical peeling curve measured during the peel test ............................................ 10

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IEC 62899-202-7:2021  IEC 2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PRINTED ELECTRONICS –
Part 202-7: Materials – Printed film – Measurement of peel strength for
printed layer on flexible substrate by the 90° peel method
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

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IEC 62899-202-7 has been prepared by IEC technical committee 119: Printed Electronics. It is

an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
119/342/FDIS 119/345/RVD

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.
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– 4 – IEC 62899-202-7:2021  IEC 2021

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement,

available at www.iec.ch/members_experts/refdocs. The main document types developed by

IEC are described in greater detail at www.iec.ch/standardsdev/publications.

A list of all parts in the IEC 62899 series, published under the general title Printed electronics,

can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

IMPORTANT – The "colour inside" logo on the cover page of this document indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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IEC 62899-202-7:2021  IEC 2021 – 5 –
INTRODUCTION

A printed layer on a flexible substrate is widely employed as an electrode or interconnection

for flexible devices. An integral component of this conductive body of the devices is

conductive composite material and is commercialized as conductive ink.

A simple tape test method has been widely used for qualitative adhesion measurement, but it

cannot be used to measure strong adhesion between the printed layer and the flexible

substrate.

A conventional peel test method is widely used in the printed circuits industry to evaluate the

adhesion between a thin printed layer with dense microstructure and the flexible substrate.

Peel strength value can be measured after an additional metal electroplating process on a

thin printed layer to increase the printed layer thickness to provide a stable grip in an

adhesion testing mac
...

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