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Item # 82-121-74028, SOFT-SHIELD® 5000 Low Closure Force EMI Strip Gaskets - Square Strips
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SOFT-SHIELD 5000 Series EMI gaskets are designed to meet the stringent shielding and mechanical performance requirements of today’s commercial electronic enclosures, medical electronics, factory automation equipment, reprographics and grounding applications. A growing number of standard profiles and sizes provide flexibility when selecting a gasket for a specific application. Custom profiles or sizes can also be produced.
Each SOFT-SHIELD 5000 Series gasket consists of an electrically conductive fabric jacket over a highly compressible urethane foam core. The nickel-plated, woven nylon rip-stop jacket is selfterminating when cut. Chosen for its excellent compressibility, the foam core typically requires less than 1 lb/in (0.175 N/mm) closure force, making it especially useful for thin-walled plastic enclosures. Standard pressure-sensitive adhesive attachment tape (PSA) makes SOFT-SHIELD 5000 Series gaskets a user-friendly and cost-effective design solution.
Every profile in the SOFT-SHIELD 5000 Series can be provided in a General Duty version or a UL 94V-0 rated version, as needed, with no difference in performance.
Features
Choice of General Duty or UL 94V-0 rated versionsTypically require < 1 lb/in (0.175 N/mm) closure force – 5 times lower than other gaskets> 90 dB attenuation from 20 MHz to 10 GHzAsymmetrical profiles, as well as “C”, “V”, “P”, “D” shapesNo performance degradation after 10,000 compression cyclesWide release liner for easy removalKiss-cut parts on release sheets for easy “peel-and-stick” grounding applicationsSelf-terminating jacket – no sharp edgesTested to Bellcore GR-64-Core Airborne Contaminants requirementsCustom lengths, custom profiles
Benefits
Cost-effectiveAlternative to BeCu fingerstockPick and place installationTechnical application supportGlobal distributor/fabricator networkApplication-ready custom parts (die-cut, spliced, etc.)
Note: Compression/deflection curves are typical. Dimensions shown do not include PSA thickness (0.005 inch typically). Actual size shown with PSA strip. All SOFT-SHIELD 5000 Series profiles can be supplied in either General Duty or UL 94V-0 rated versions.
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Jacket Type
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Nickel-plated nylon rip-stop fabric
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PSA Tape Backing
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PSA tape
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Gasket Service Rating
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General duty (urethane foam core)
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Profile Number
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74028
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Height
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0.500 in
12.70 mm
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Width
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0.500 in
12.70 mm
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Conductive Pressure-Sensitive Adhesive
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Non-conductive adhesive
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Operating Temperature Range
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–40 to 70 ºC
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Test Method Compression Set
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ASTM D3574 (modified)
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Compression Set
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< 15 %
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Test Method Electrical Conductivity
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CEPS-0002
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Electrical Conductivity Max.
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0.1 O/sq
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Test Method Adhesive Peel Strength
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ASTM D1000 (90° Bend)
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Adhesive Peel Strength Min.
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4 lb/in
0.7 N/mm
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Product Forms
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SQ, REC., D, C, P, L and Custom
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Typical Applications
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Doors, Panels, Seams, Faceplates, Ground Pads
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Method of Manufacture
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Dispensed foam
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Jacket Material
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Ni/Ag Plated rip-stop Nylon
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Foam
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High Performance Urethane Foam
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Attachment Method (PSA)
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Non conductive, high temp, high tack, closed cell, acrylic PSA
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Baseline EMI Shielding
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90 dB
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Shielding Effectiveness After Cycling
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Better
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Softness
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Better
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Compression Set ASTM D395 - Method B
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70 ºC - 10 %
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RoHS Compliant
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Yes
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Configurations
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Gaskets are supplied in standard 8-foot lengths or cut-to-length strips. Depending on the profile, gasketing can also be supplied on spools. For rapid peel-and-stick grounding applications, the material is supplied as kiss-cut parts on polyester film release backers, or as individual pieces. Chomerics also fabricates single-piece, spliced picture frame gaskets from continuous lengths. With their fully jacketed surfaces, these gaskets are ideally suited for low closure force applications that require 360° EMI shielding, or the ease of installing a onepiece gasket.
Chomerics’ Applications Engineering department welcomes the opportunity to provide assistance with design and prototype fabrication of SOFT-SHIELD 5000 Series EMI Gaskets in custom profiles.
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Typical Application-Ready Solutions
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Mobile phone grounding
Conditions and Requirements
minimize thru-resistance for optimum groundingmaximum 0.25 x 0.25 inch footprintaccommodate 0.040 inch variation in gapsnap-in plastic cover with 2 lb max. load at 50% gasket deflectionhigh volume application
SOFT-SHIELD Gasket Solution
highly conductive jacket offers low resistancestandard 6 x 6 mm profile, no customization requiredmeets low closure force requirementskiss-cut parts on release paper allow quick peel-and-stick installation
Interface between aluminum casting and plastic antenna housing
Conditions and Requirements
overcome 45 dB leakage problemreplace multiple strips with single-piece design for ease of installation0.030 inch flatness tolerance on component mating surfaceslow cost a priority
SOFT-SHIELD Gasket Solution
effectively
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Typical Tolerances
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Typical cross section tolerances:
±0.010 in. (0.25 mm) for all dimensions up to 0.04 in. (1.02 mm)
±0.020 in. (0.51 mm) for all dimensions above 0.04 in. (1.02 mm)
Detailed part drawings are available on request.
Typical length tolerances:
0.10 to 6.0 in. (0.25 to 15.2 cm) ± 0.030 in. (0.76 mm)
6.1 to 18.0 in. (15.5 to 45.7 cm) ± 0.060 in. (1.52 mm)
18.1 to 42.0 in. (46.0 to 106.7 cm) ± 0.075 in. (1.91 mm)
42.1 to 96.0 in. (107.0 to 243.8 cm) ± 0.090 in. (2.29 mm)
Typical kiss-cut tolerances:
0.04 to 0.12 in. (1.02 to 3.05 mm) ± 0.015 in. (0.38 mm)
0.121 to 0.40 in. (3.07 to 10.16 mm) ± 0.035 in. (0.89 mm)
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