LAIRD Fabric-over-Foam METALLIZED SHIELDING GASKETS
Laird is a fully integrated manufacturer of profile and Input/
Output (I/O) EMI shielding gaskets. The metallized Fabric-
Over-Foam product line has been expanded greatly due to our
committed efforts in new product development and meeting or
surpassing regulatory requirements.
This catalog is designed to provide helpful information to
engineers on our expanded product line. In this section, you will
find benefits for Fabric-Over-Foam gaskets, material options and
an extensive list of profile and I/O sizes and configurations.
Laird specializes in quick turnaround of custom shapes and sizes
of EMI shielding gaskets. If you don’t find exactly what you
need, our engineers will help you design the right solution to
your shielding problem.
A sampling for standard profiles are shown; custom
configurations and sizes can be designed to meet your specific
requirements. Profiles are shown in ascending order by height.
The recommended operating compression for Fabric-Over-Foam
EMI Gaskets will vary depending on the shape and size of the
particular gasket.
Typically, D-Shaped, Rectangular Shaped, and Square Shaped
Fabric-Over-Foam EMI Gaskets should be compressed between
30% and 50% of the foam height.
Similarly, C-Shaped Fabric-Over-Foam EMI Gaskets should
typically be compressed between 50% and 75% of the
gasket height.
Force Displacement Resistance (FDR) graphs are available upon
request. Please contact engineering department at Laird when
unsure.
Certain combinations of materials may not be available for all
Profiles or I/Os. Please consult the Engineering Department at
Laird when unsure.
BENEFITS OF FABRIC-OVER-FOAM GASKETS
• Shielding effectiveness of >100 dB across a wide spectrum of
frequencies (see figure 2).
• Extremely low compression forces allow for use of lighter
materials (see figure 1).
• Low Surface Resistivity as low as 0.07 ohms/square dependent
on the fabric. Fabric-Over-Foam gaskets provide improved
conductivity (ASTM F390).
• A wide range of flame retardant gaskets are available
(UL recognized per UL94 V0 or UL94 HB). More information
is available at ul.com.
• Abrasion resistant metallized fabrics show virtually no
degradation in shielding performance.
• Urethane core provide low compression set ensuring
long-term reliability of gasket performance. Contact
Engineering for profile specific data.
• Service temperatures from -40°F to 158°F
(-40°C to 85°C).
• Available in Nickel/Copper (Ni/Cu) and Tin/Copper (Sn/Cu) to
ensure galvanic compatibility with a wide variety of host
materials. Both versions display no significant performance
degradation after environmental exposure per the Accelerated
Aging Test (ASTM B845-93 Method H).