Parker Chomerics SOFT-SHIELD® 4008 Low Closure Force, Foam Core EMI Gasket

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Parker Chomerics SOFT-SHIELD® 4008 Low Closure Force, Foam Core EMI Gasket
Categories:	Polymer; Thermoset; Polyurethane, TS; Thermoset Polyurethane Foam, Unreinforced
Material Notes:	Description: Chomerics’ SOFT-SHIELD 4000 Series materials are low-cost, low closure force EMI gaskets that provide effective shielding and grounding of commercial electronic devices, indoor enclosures and industrial equipment. Their availability in thin cross sections makes them an ideal choice for access panel, back plane or I/O connector panel shielding. Rectangular in cross section, the 4000 Series materials are constructed of a closed cell urethane foam that is machine wrapped with a fabric-reinforced aluminum foil. This combination provides the shielding performance of foil and the conformability and toughness of fabric. Each material includes conductive, pressure-sensitive adhesive on one side, which provides a means of gasket attachment without compromising shielding performance. The fabric-reinforced foil covering has no loose conductive fibers or sharp edges. Low compression set, low surface resistivities, and durability make 4000 Series gasketing an excellent EMI shielding solution. Information provided by Chomerics
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Mechanical Properties	Metric	English	Comments

Peel Strength	0.438 kN/m	2.50 pli	To Aluminum, Ambient Temperature; ASTM D1000
	0.438 kN/m	2.50 pli	To Steel, Ambient Temperature; ASTM D1000
	0.525 kN/m @Treatment Temp. 177 °C, Time 173000 sec	3.00 pli @Treatment Temp. 351 °F, Time 48.0 hour	To Steel; ASTM D1000
	0.5425 kN/m @Treatment Temp. 177 °C, Time 173000 sec	3.096 pli @Treatment Temp. 351 °F, Time 48.0 hour	To Aluminum; ASTM D1000
	0.6825 kN/m @Treatment Temp. 177 °C, Time 3600 sec	3.894 pli @Treatment Temp. 351 °F, Time 1.00 hour	To Steel; ASTM D1000
	0.700 kN/m @Treatment Temp. 177 °C, Time 3600 sec	3.99 pli @Treatment Temp. 351 °F, Time 1.00 hour	To Aluminum; ASTM D1000
	0.700 kN/m @Treatment Temp. 74.0 °C, Time 173000 sec	3.99 pli @Treatment Temp. 165 °F, Time 48.0 hour	95% RH, To Steel; ASTM D1000
	0.7175 kN/m @Treatment Temp. 74.0 °C, Time 173000 sec	4.094 pli @Treatment Temp. 165 °F, Time 48.0 hour	95% RH, To Aluminum; ASTM D1000
	0.875 kN/m @Treatment Temp. 204 °C, Time 3600 sec	4.99 pli @Treatment Temp. 399 °F, Time 1.00 hour	To Steel; ASTM D1000
	0.8925 kN/m @Treatment Temp. 204 °C, Time 3600 sec	5.093 pli @Treatment Temp. 399 °F, Time 1.00 hour	To Aluminum; ASTM D1000
Compression Set	<= 20 %	<= 20 %	25% Deflection; ASTM D395 Method B

Electrical Properties	Metric	English	Comments
Surface Resistivity per Square	0.0070 ohm @Temperature 121 °C, Time 605000 sec	0.0070 ohm @Temperature 250 °F, Time 168 hour	Initial; CHO-TM-TP57
	0.0070 ohm @Temperature 35.0 °C, Time 605000 sec	0.0070 ohm @Temperature 95.0 °F, Time 168 hour	95% RH, Initial; CHO-TM-TP57
	0.0090 ohm @Temperature 85.0 °C, Time 605000 sec	0.0090 ohm @Temperature 185 °F, Time 168 hour	Initial; CHO-TM-TP57
	0.010 ohm @Temperature 35.0 °C, Time 605000 sec	0.010 ohm @Temperature 95.0 °F, Time 168 hour	95% RH, Final; CHO-TM-TP57
	0.010 ohm @Temperature 70.0 °C, Time 7.88e+6 sec	0.010 ohm @Temperature 158 °F, Time 2190 hour	Initial; CHO-TM-TP57
	0.010 ohm @Temperature 70.0 °C, Time 7.88e+6 sec	0.010 ohm @Temperature 158 °F, Time 2190 hour	Final; CHO-TM-TP57
	0.014 ohm @Temperature 85.0 °C, Time 605000 sec	0.014 ohm @Temperature 185 °F, Time 168 hour	Final; CHO-TM-TP57
	0.017 ohm @Temperature 121 °C, Time 605000 sec	0.017 ohm @Temperature 250 °F, Time 168 hour	Final; CHO-TM-TP57
Shielding Effectiveness	80 dB @Frequency 1e+10 Hz	80 dB @Frequency 1e+10 Hz	CHO-TM-TP08
	90 dB @Frequency 1e+8 Hz	90 dB @Frequency 1e+8 Hz	CHO-TM-TP08
	93 dB @Frequency 1e+9 Hz	93 dB @Frequency 1e+9 Hz	CHO-TM-TP08

Thermal Properties	Metric	English	Comments
Maximum Service Temperature, Air	70.0 °C	158 °F
Flammability, UL94	V-0	V-0

Descriptive Properties
Adhesion	>2.5 lb/in		Initial PSA, ASTM D1000
Compression Cycling	10000 cycles at 50% Deflection, Final
	10000 cycles at 50% Deflection, Initial
Compression-Deflection, 25% deflection	<3 to <8 psi		ASTM D3574 Modified
Core	PORON Urethane Foam
Jacket	Fabric-Reinforced Aluminum Foil
PSA Type	Chomerics Electrically Conductive Acrylic

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PCHOME259 / 130969

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