Datasheet

ELECTRONIC ENCLOSURE USES
Seams
Doors
Back Panel I/O’s
Removable Panels
Bezels
Control Openings
V
ents
PRODUCT FORMS
Gaskets
Seals
O-Rings
Grounding Pads
Die-cuts
I/O Interface Gaskets
APPLICATIONS
RFI/EMI Shielding
Grounding
Electrostatic Discharge (ESD)
Electromagnetic Pulse (EMP)
TYPICAL EQUIPMENT
Computers
Data Processing
Telecommunications
Instrumentation
Medical Diagnostics
Industrial Controls
Office Products
Automotive
Dual elastomer extrusions can be made in a wide range of
cross-section profiles. Flexibility in geometry is an important
concept for a designer to consider. A variety of profiles are now
available and almost any shape can be tooled.
Simple means of mounting ULTRA-VANSHIELD
®
gaskets
include metal C-clips, rivets or pressure sensitive adhesive tape.
The conventional tape used is a non-conductive pressure
sensitive adhesive which adheres well to
rubber, metal or plastic. Conductive
adhesive tapes are also available.
Another alternative is a press-fit
mounting into a groove. One such gasket
is used in the telecommunications industry
as shielding for cellular telephones. The
overall diameter is in the range of 1 to 2
mm while still retaining all conductive and
mechanical properties of larger gaskets.
See page 14 for installation attachment methods and optional
configurations.
The elastomeric material greatly resists change due to heat
exposure. In fact, it is formulated to function optimally at
temperatures from -100ºF up to +480ºF (-75ºC to +250ºC) , making
it ideal for applications in the automotive industry and in other high
temperature situations. ULTRA-VANSHIELD
®
components are
formulated for flammability resistance which meets
ASTM
Specification D4205-93, subsection 15.6, horizontal burn (HB).
Additionally, ULTRA-VANSHIELD
®
materials can be formulated to
meet ASTM D4205-93, subsection 15.6 for vertical flame
resistance specification (V-
0).
Endurance tests of ULTRA-VANSHIELD
®
dual elastomer gaskets through 25,000
cycles of repeated compressions indicate
no change in volume resistivity and no
measurable compression set (Table 2).
Accelerated aging tests provide similar
results with almost no change in volume
resistivity (Table 2).
ULTRA-VANSHIELD
®
standard silicone-based materials easily lend
themselves to optional formulations which are application-specific;
such as, higher flame retardancy and low compression/deflection
characteristics.
TEST DESCRIPTION MEASUREMENT RESULT
Elevated Temperature Immediate 0.001 ohm-cm
V
olume resistivity
70 hr
s @ 437ºF
0.0025 ohm-cm
performance at
70 hrs @ 212ºF 0.001 ohm-cm
80% relative humidity 70 hrs @ 100ºF 0.002 ohm-cm
Endurance Resistance
To Relaxation Volume Resistivity No change
Repetitive compressions, Surface Resistivity No change
10/minute, 25,000 cycles,
Relax
ed Height
No compression set
0% to 25% compression,
Instron Physical Tester
3
Ultra-Vanshield
®
applications
long-term effectiveness
Table 2. Long-term performance characteristics