Parker Chomerics EMI Shielding Oriented Wire Gaskets

Parker Chomerics POLA® SPONGE Oriented Wire in Soft Elastomer

Parker Chomerics POLA® SPONGE, also known as TECKNIT® ELASTOFOAM, is oriented wire in a soft, closed-cell silicone elastomer that provides a low closure force, weather sealing, EMI shielding solution.

POLA® SPONGE Advantages:

  • Low-hardness closed cell silicone sponge allows for reduced gasket load requirements to obtain weather sealing and EMI shielding performance
  • Lower gasket load requirements allow for broader tolerance schemes, with less fasteners and thinner flange designs, resulting in lower costs associated with the overall system design.
  • Multiple wire alloy options allow for galvanic compatibility to be optimized between the gasketing and mating surfaces
  • Galvanic compatibility allows for optimized corrosion mitigation and avoidance of related rework costs.
  • Cured in place oriented wires will not dislodge, thereby eliminating foreign object debris concerns
  • Elimination of foreign object debris ensures costly application rework due to electrical shorting can be avoided.
  • Wire “bite-through” during gasket deflection allows for non-conductive pressure sensitive adhesive to be used rather than the conductive systems more commonly offered with EMI gasketing solutions
  • The elimination of conductive pressure sensitive adhesive results in better adhesion and less galvanic corrosion potential for the overall system.
  • Various form factors are offered including strips, sheets and converted gaskets, thereby allowing for easy application and manufacturing integration
  • Various form factors reduce secondary operations and capital expenditures commonly ass

Material Specification
Typical Properties Silicone Closed Cell Sponge Wire Alloys
Aluminum1 Monel Phosphor Bronze2
Material Specification AMS-3195 Alloy 5056, AMS-4182 QQ-N-281, AMS-4730 Alloy 30, ASTM B-105
Wire Diameter -- 0.005 in (0.13 mm) 0.0045 in (0.11 mm) 0.002 in (0.05 mm)
Temperature Range -65 °F to 392 °F
(-55 °C to 200 °C
See Below3
Recommended Compression 10% - 40% (considering LMC & MMC)4
Recommended Closure Force 10 PSI to 40 PSI
Pressure Sensitive Adhesive Option Acrylic, 0.002" thick
Sponge Density 0.028 lbs/in3 --
Wire Population Density -- 650/in2 +/- 15%
Recommended Storage Conditions & 50% Relative Humidity 70° F +/- 20
(21 °C +/- 10)
Shelf Life, PSA (No PSA) 12 months5 (Indefinite)

Notes:

  1. Except maximum tensile strength of 75,000 PSI
  2. Non-standard, please inquire
  3. Composite material is limited by silicone temperature range
  4. LMC: Least Material Condition, MMC: Maximum Material Condition
  5. Shelf life starts at date of shipment. There is no shelf life extension policy for this product.

Parker Chomerics POLA® SOLID Oriented Wire in Soft Elastomer

POLA® SOLID is a composite electromagnetic interface (EMI) shielding and environmental sealing gasket material consisting of hundreds of individual fine wires embedded into the z-axis of solid elastomer. Available in various flat seal configurations, including sheets, strips and die-cut parts, POLA® SOLID is easily integrated into existing application assemblies, making the switch from a non-EMI solution possible. With comparable performance at a fraction of the cost of alternative solutions that provide both EMI shielding and weather sealing performance, as well as the opportunity to exactly match the galvanic potential of interfacing aluminum surfaces, POLA® SOLID provides total cost of ownership savings in excess of 50% through price point and corrosion rework reductions.

POLA® SPONGE Advantages:

  • Solid silicone results in increased durability and sealing performance
  • A solid silicone binder results in a robust gasketing material that can withstand greater fastener torque values as well as increased pressure and weather sealing requirements.
  • Multiple wire alloy options allow for galvanic compatibility to be optimized between the gasketing and mating surfaces
  • Galvanic compatibility allows for optimized corrosion mitigation and avoidance of related rework costs.
  • Cured in place oriented wires will not dislodge, thereby eliminating foreign object debris concerns
  • Elimination of foreign object debris ensures costly application rework due to electrical shorting can be avoided.
  • Wire “bite-through” during gasket deflection allows for non-conductive pressure sensitive adhesive to be used rather than the conductive systems more commonly offered with EMI gasketing solutions
  • The elimination of conductive pressure sensitive adhesive results in better adhesion and less galvanic corrosion potential for the overall system, thereby reducing both gasket installation labor and rework associated with corrosion.
  • Various form factors are offered including strips, sheets and converted gaskets, thereby allowing for easy application and manufacturing integration
  • Various form factors reduce secondary operations and capital expenditures commonly associated with gasket conversion.

Material Specification
Typical Properties Solid Silicone Solid Fluorosilicone2 Wire Alloys
Aluminum1 Monel Phosphor Bronze2
Material Specification A-A-59588
Class 3A, Grade 30
MIL-R-25988
Class 1, Grade 40, Type II
Alloy 5056
AMS-4182
QQ-N-281,
AMS-4730
Alloy 30,
ASTM B-105
Wire Diameter -- -- 0.005 in (0.13 mm) 0.0045 in (0.11 mm) 0.002 in (0.05 mm)
Temperature Range -65 °F to 392 °F
(-55 °C to 200 °C)
-65 °F to 392 °F
(-55 °C to 200 °C)
See Below3
Recommended Compression 10% - 30%, (considering LMC & MMC)4
Recommended Closure Force 25 to 110 psi (172 to 690 kPa)
Pressure Sensitive Adhesive (PSA) Option Acrylic, 0.002" thick
Compression Set 25% 25% --
Wire Population Density 900/in2 +/-
Recommended Storage Conditions @ 50% Relative Humidity 70° F +/- 20
(21 °C +/- 10)
Shelf Life, PSA (No PSA) 12 Months5 (Indefinite)

Notes:

  1. Except maximum tensile strength of 75,000 PSI
  2. Non-standard, please inquire
  3. Composite material is limited by silicone temperature range
  4. LMC: Least Material Condition, MMC: Maximum Material Condition
  5. Shelf life starts at date of shipment. There is no shelf life extension policy for this product.

Parker Chomerics EMI Shielding

Conductive Elastomer Gaskets
Conductive Foam Based Gaskets
Fingerstock Gaskets
Wire Mesh Gaskets
Woven Mesh & Expanded Metal Foil

Conductive Elastomer Gaskets

Parker Chomerics electrically conductive elastomer gaskets are the superior choice for corrosion resistance, environmental sealing, and cost-effective EMI shielding. Available as molded sheets or parts, allowing for greater part complexity and detail but sometimes at a higher cost; or extruded into strips and either offered as cord stock at length or spliced (fused) to form a continuous seal.


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Conductive Foam Based Gaskets


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Fingerstock Gaskets


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Wire Mesh Gaskets


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Woven Mesh & Expanded Metal Foil


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