Specialty Fabrics Review November 2022 - 39

electronic performance of woven, knitted
and braided e-textiles integrated
with conductive yarns and/or wires.
This revision will reference many new
IPC test methods for e-textiles durability,
which are being developed jointly
as part of the effort around IPC-8981
for wearables.
The task groups for these standards
are led by Sahar Rostami of Myant Inc.,
and Joe Geiger of Bally Ribbon Mills.
Printed electronics
There are two standards and one
IPC test method being developed
for printed electronics for e-textiles
systems. IPC-8952, Design Standard
for Printed Electronics on Coated or
Treated Textiles and E-Textiles, will
establish requirements for the design
of printed electronics and their forms
of component mounting on coated or
treated textile substrates.
The textile substrate could be a bare
textile or an integrated e-textile (woven
or knitted). The standard printed electronic
design (SPED) classification from
IPC-8952 provides a visual description
for a designer to communicate to the
manufacturer the printing process steps
for building the design.
As part of the development of this
standard, the task group developed
IPC-8971, Requirements for Electrical
Testing of Printed Electronics
E-Textiles , as well as a new IPC test
method, Conductor Temperature
Rise Due to Current Changes in
Conductors for Printed Conductor
Materials on Textiles.
The task groups for these are led by
Pratyush Rai of Nanowear Inc., and
Chuck Kinzel of Liquid Wire Inc.
E-textile wearables
In late 2018, European e-textile
companies and institutions formed a
regional IPC E-Textiles Committee to
discuss and debate standards needs
in their region.
This led to the formation of a new
task group that spent nearly three years
working on IPC-8981, Quality and
Reliability of E-Textiles Wearables,
which will establish required testing
and reliability expectations for e-textiles
wearables products. This standard will
set testing requirements for multiple
mechanical and exposure characteristics
that would apply to e-textiles wearables
systems. These include acid, microbes,
saltwater, perspiration, alkali, abrasion,
stretch, torsion, flex endurance
and washability.
During its work, this group also
curated a plethora of content on
e-textiles wearables. Since the reliability
All IPC standards are
developed by volunteers
from the global electronics
industry, and all IPC
standardization activities
are open to anyone for
free participation.
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Specialty Fabrics Review November 2022

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