Robert Mckeown Co., Inc
111 Chambers Brook Rd.
Branchburg, NJ 08876 US
Phone: 908.218.9000 • Fax: 908.218.8949
Email: sales@robertmckeown.com
All Categories > EMI & ESD Shielding Products > EMI Shielding Gaskets & Conductive Elastomers > Low Closure Force Gasketing Elastomers > Low Closure Force Gasketing Elastomer Profile Selector Guide > SOFT-SHIELD® 3500 Low Closure Force EMI Strip Gaskets - Knife-Edge Profiles > Item # 77-1J-3811  


SOFT-SHIELD 3500 Low Closure Force EMI Strip Gaskets - Knife-Edge Profiles

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Item # 77-1J-3811, SOFT-SHIELD® 3500 Low Closure Force EMI Strip Gaskets - Knife-Edge Profiles

The SOFT-SHIELD® 3500 fabric over foam (fof) product family are a group of low-closure force EMI/EMC gaskets. SS3500 offers a low cost competitive solution for EMI shielding and electrical grounding in sheer and compression.

The SS3500 product family is comprised of conductive fabric wrapped around open cell foam. This wrap around technology grounds the gasket from point to point, ultimately eliminating an EMI/EMC gap.

SS3500 typically requires less then 1lb/in (0.175/ mm) closure force, making it effective for low closure force applications. SS3500 takes less than 15% compression set. This is less than most other FOF’s on the market resulting in reliable/ repeatable shielding performance. SS3500 is an excellent alternative shielding solution to traditional spring finger type products.

The SS3500 product family is one of the most versatile EMI fof products offered to the market. Depending on mechanical and shielding requirements, the SS3500 can be made with different conductive jackets. Nickel-plated taffeta, Nickel-plated rip-stop polyester, halogen free nickel-plated rip-stop, etc. New geometric profiles are designed and released to the market on a regular basis. Profiles are engineered to optimize mechanical form fit and function while optimizing electrical performance. This technical data sheet will address the most common type FOF. Chomerics has to offer to market. Contact Chomerics for any other special design requirements and an updated profile list.

Product Features:
  • Low cost
  • > 100 (dB) shielding effectiveness 50 MHz to 10 GHz
  • Low closure force
  • Ultra-soft profiles that accommodate a wide range of tolerance gaps
  • Over 200 profiles available to the market
  • Readily available in bulk, cut to length or with cut features
  • ULV0
  • RoHS Compliant
  • REACH Compliant
  • Excellent low compression set properties
  • Abrasion/sheer resistant conductive jackets
  • Low contact resistance


    • Typical Applications:
  • Server Faceplates and blade cards
  • Panel seals
  • Cover seal
  • Door seals
  • Grounding tabs
  • EMI Window/vent seals
  • Improved ground paths
  • Low cost solutions are imperative
    •



     Specifications 

    PSA Tape Backing
    		RipStop fabric, PSA and Extended Liner

    Profile Number
    		3811

    Height
    		0.252 in
    6.4     mm

    Width
    		0.752 in
    19.1     mm

    Test Method Shielding Effectiveness
    		CHO-TM-TP08

    Shielding Effectiveness at 50 MHz to 10 GHz
    		> 100 dB

    Test Method Compression Deflection
    		ASTM C165

    35% Compression Deflection1
    		< 1 lb/in
    < 0.175     N/mm

    Test Method Compression Set
    		ASTM D3574

    Compression Set
    		< 15 %

    Operating Temperature Range
    		–40 to 70 ºC

    Test Method Acrylic Adhesive Peel Strength
    		ASTM D1000

    Acrylic Adhesive Peel Strength Min.
    		4 lb/in
    0.7     N/mm

    Recommended % Deflection
    		30 to 50 %

    Test Method Flamability
    		UL 94

    Flamability
    		V-0

    Product Forms
    		SQ, REC., D, C, P, L and Custom

    Typical Applications
    		Doors, Panels, Seams, Faceplates, Ground Pads

    Method of Manufacture
    		Wrapped foam

    Jacket Material
    		Ni/Cu Plated Taffeta Polyester

    Foam
    		Standard performance Urethane Foam

    Attachment Method (PSA)2
    		Non conductive, closed cell, acrylic PSA

    Baseline EMI Shielding
    		80 dB

    Shielding Effectiveness After Cycling
    		Good

    Softness
    		Best

    Compression Set ASTM D395 - Method B
    		70 ºC - 25 %

    RoHS Compliant
    		Yes
    1 0.125 x 0.375 in gasket
    2 PSA typically covers less then 50 % of contact area. Upon compression the conductive fabric will make direct contact to the interface.