ISO 17449:2015

INTERNATIONAL ISO
STANDARD 17449
First edition
2015-11-15
Road vehicles — Safety glazing
materials — Test methods for
properties of electrically heated
glazing
Véhicules routiers — Vitrages de sécurité — Méthodes d’essai pour les
propriétés des vitrages chauffés électriquement
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specimens . 3
5 Conditioning of test specimens . 3
6 Application of test . 3
7 Requirements . 4
7.1 Circuit continuity and heating power . 4
7.1.1 Purpose of test . 4
7.1.2 Apparatus . 4
7.1.3 Procedure . 4
7.1.4 Expression of results . 4
7.2 Driving visibility . 5
7.2.1 Purpose of test . 5
7.2.2 Apparatus . 5
7.2.3 Procedure . 5
7.2.4 Expression of results . 5
7.3 Electrical attachment bond performance . 5
7.3.1 Purpose of test . 5
7.3.2 Apparatus . 5
7.3.3 Procedure . 6
7.3.4 Expression of results . 6
7.4 Electrical attachment bending performance . 6
7.4.1 Purpose of test . 6
7.4.2 Procedure . 6
7.4.3 Expression of results . 6
7.5 Hot spot and heating uniformity . 6
7.5.1 Purpose of test . 6
7.5.2 Apparatus . 7
7.5.3 Procedure . 7
7.5.4 Expression of results . 7
7.6 Defrosting efficiency . 7
7.6.1 Purpose of test . 7
7.6.2 Apparatus . 7
7.6.3 Procedure . 8
7.6.4 Expression of results . 8
7.7 High voltage durability . 8
7.7.1 Purpose of test . 8
7.7.2 Procedure . 8
7.7.3 Expression of results . 9
7.8 Low temperature performance . 9
7.8.1 Purpose of test . 9
7.8.2 Apparatus . 9
7.8.3 Procedure . 9
7.8.4 Expression of results . 9
7.9 Long term humidity durability . 9
7.9.1 Purpose of test . 9
7.9.2 Apparatus . 9
7.9.3 Procedure .10
7.9.4 Expression of results .10
8 Acceptance criteria .10
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information.
The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 35, Lighting
and visibility.
iv © ISO 2015 – All rights reserved

INTERNATIONAL STANDARD ISO 17449:2015(E)
Road vehicles — Safety glazing materials — Test methods
for properties of electrically heated glazing
1 Scope
This International Standard provides the test methods and acceptance criteria for circuit continuity and
heating power, driving visibility, electrical attachment bond performance, electrical attachment bending
performance, hot spot identification and heating uniformity, defrosting efficiency, high voltage durability,
low temperature performance and long term humidity durability, for all electrically heated safety glazing
materials in a road vehicle. This International Standard provides test protocols for the static performance
of an electrically heated glazing material; it is not representative of in-vehicle performance.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 3538, Road vehicles — Safety glazing materials — Test methods for optical properties
IEC 60051–2, Direct acting indicating analogue electrical measuring instruments and their accessories,
Part 2 — Special requirements for ammeters and voltmeters
3 Terms and definitions
For the purpose of this document, the following terms and definitions apply.
3.1
heating evaluation area
for Type 1 (3.7), represented by an area formed by outermost conductors at an extended distance of
20 mm wider than the bus bars (along the edges) and extended to 50 mm on both the top and bottom, in
the absence of specific requirements and for a glazing equipped with heating circuits formed by evenly
distanced conductive lines and bus bars near to the glass edges
Note 1 to entry: If the extended distance is over the edge of the glass, then take the glass edge as the border
of evaluation area. The size of this generated area is calculated using CAD, see Figure 1. For other specifically
designed heaters with e.g. circular shaped heater, product specification can be referenced for the heating
evaluation area.
for Type 2 (3.8) and Type 3 (3.9), shall be the same as the area of the heating elements themselves, in the
absence of special requirements
Note 2 to entry: No additional area shall be included.
Heating evaluation area
Key
1 glass
2 heating circuits
3 electrical attachment
4 bus bar
5 outmost conductor
Figure 1 — Heating evaluation area of Type 1
3.2
electrical attachment
components used for connecting to the vehicle power supply
3.3
defrosting
elimination of frost from the exterior of the glazing by heating at specified voltage
3.4
melted area
area of the outer glazed surface of the sample having a dry surface or covered with melted frost
Note 1 to entry: Partially melted area is excluded. The melted area shall be determined visually.
3.5
defrosting efficiency
ratio of the melted area to the heating evaluation area after supplying specified voltage for the specified
period of time at specified ambient condition
3.6
hot spot
any area on outer surface of the whole part that exceeds the maximum temperature defined in the
product specification after the part is supplied with specified voltage for the specified heating time
period at the specified ambient condition
3.7
Type 1
heater circuit consisting of conductors applied to the inside surface of a tempered or laminated safety
glass or a plastic safety glazing parts by means of a screen print, ink jet, or other method
2 © ISO 2015 – All rights reserved
20 mm
50 mm
50 mm
...