In
our new Trishield EMI
gasket we have succeeded
in combining properties
which together make the
product unique. Thanks
to our new dispensing
technology we can offer
a gasket with 15 db better
shielding, 30 percent
lower compression force
and a 10 to 13 percent
lower price.
Trishield is the result
of many years of development
work at Nolato. Our aim
has been to find the optimal
material and the functionally
best gasket shape. With
Trishield we have succeeded.
Dimensions
Trishield
is available in all dimensions
from 0.5 mm to 3.0 mm. (Other
dimensions can also be supplied
to meet special requirements.)
The width is generally the
same as the required height.
The gasket is triangular,
so the width is smaller
at the top of the gasket.
Trishield’s properties are
at their best in a high,
narrow gasket. Here are
some examples of common
dimensions in free and compressed
condition.
Product
code
purchased
Figure
Build-in
height
Dimensions
for beads
(mm)
Filler
h
nom
w
max
Trishield
8615/0,8
1
0.5
0.8±0.08
0.9
Ag/Ni
Trishield
8615/1,0
1
0.7
1.0±0.10
1.1
Ag/Ni
Trishield
8615/1,2
1
1.0
1.2±0.15
1.2
Ag/Ni
Trishield
8615/1,7
1
1.3
1.7±0.15
1.6
Ag/Ni
Compression
set properties
Compression
set is the permanent deformation
of the material after compression.
It is measured according
to ISO 815 and with a gasket
height of 1.6 mm. The gasket
is compressed 25 % for about
72 hours at 85 °C. With
Trishield technology, a
level of about 17 % can
be achieved.
Corrosion
properties
The
diagram below shows little
difference between aged
or non-aged material for
the Trishield material.
If the material retains
excellent shielding properties
after ageing, it has good
ageing properties.
※
Shielding effectiveness comparison:
Bleeding
In
tests, the gasket is compressed
25 % for 22 hours against
a piece of white paper.
Trishield showed no signs
of leakage.
Compression
forces
A
lower compression force
can be used with Trishield
technology, because of its
geometry and the fact that
it contains less material
that earlier gaskets. Trishield
gives about 30 % lower compression
force than earlier dispensing
materials. In percentage
terms you gain more with
a thicker gasket. See the
table below.
Gasket
Force
@10% defl.
N/cm
Force
@20% defl.
N/cm
Force
@25% defl.
N/cm
Force
@30% defl.
N/cm
Force
@50% defl.
N/cm
Trishield
8615
3,0
6,1
7,7
9,6
30,1
Nolato
8600
2,9
7,5
10,2
13,6
57,7
Shielding
properties
Trishield
technology orients the
particles in the gasket
for better contact with
each other. This gives
better shielding capacity
for the same amount of
filler. This means improved
shielding and today’s
level of conducting particles.
Another option is a
lower degree of filler
in the gasket and shielding
equal to today’s level.
This gives even lower
compression forces and
a lower price. Depending
on application this can
be varied from case to
case. The diagram shows
the shielding capacity
before and after ageing
of the materials Nolato
8600 och Trishield Nolato
8615.
The
cost picture
Trishield
technology makes better
use of included components
that today’s systems. Machine
time and consumption of
materials are reduced. Because
of its higher technical
level, the material is slightly
costlier to produce. Overall,
Trishield give a better
price for a gasket with
a given height and length.
Max Shield
