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Master Bond adhesives

Parker Chomerics CHO-MASK II HT Conductive Foil Tape
Categories: Polymer; Tape

Material Notes: The CHO-MASK II family of EMI foil tapes includes both Standard Tack (ST) and High Tack (HT) versions for providing a conductive, non-corroding surface on painted metal electronic enclosures. CHO-MASK II tapes consist of recessed polyester paint masking film covering a layer of either 1 oz. (28.4g) or 2 oz. (56.7g) tinplated copper foil. The back of the foil features a conductive pressure sensitive adhesive (PSA). CHO-MASK II tape is applied to clean metal frame, door and panel surfaces where electrical continuity is required. After painting, the peel-off mask is easily removed, allowing the paint to seal both edges of the foil layer. The foil imparts a clean, electrically conductive path from the panel, through an EMI gasket, to the cabinet frame. It also provides grounding points within the enclosure.

Application: Oven bake up to 400°F (204°C) for 1 hour; Suitable for knife edge, radius and flat surface applications; Lengths of <5 ft. above 350°F (177°C) recommended

Information provided by Chomerics

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Physical PropertiesMetricEnglishComments
Thickness 35.6 microns1.40 mil1 oz. Tinned Copper Foil
 50.8 microns2.00 milAcrylic Adhesive
 71.1 microns2.80 mil2 oz. Tinned Copper Foil
 76.2 microns3.00 mil1 oz. Total Thickness; ASTM D1000
 122 microns4.80 mil2 oz. Total Thickness; ASTM D1000
 
Electrical PropertiesMetricEnglishComments
Surface Resistance <= 0.20 ohm<= 0.20 ohmChomerics TM 71
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 82.0 °C180 °FChomerics
Minimum Service Temperature, Air -40.0 °C-40.0 °FChomerics
 
Processing PropertiesMetricEnglishComments
Cure Time <= 60.0 min
@Temperature 204 °C
<= 1.00 hour
@Temperature 399 °F
Paint Cure Cycle
 
Descriptive Properties
Adhesion Mask to Foil24 oz./inchASTM D1000
Adhesion to Aluminum543 N/m48 hrs @ 177°C; ASTM D1000
 700 N/m1 hr @ 177°C; ASTM D1000
 718 N/m168 hrs @ 74°C/95% RH; ASTM D1000
 893 N/m1 hr @ 204°C; ASTM D1000
Adhesion to Steel525 N/m48 hrs @ 177°C; ASTM D1000
 683 N/m1 hr @ 177°C; ASTM D1000
 700 N/m168 hrs @ 74°C/95% RH; ASTM D1000
 875 N/m1 hr @ 204°C; ASTM D1000
Chemical ResistancePassTrichloroethane, ethanol, acids, cleaning solvents, and alkaline solutions; ASTM D896-84
Corrosion ResistancePassSalt Fog Chamber at 35°C, 144 hrs; MIL-STD-810
Humidity Exposure Pass@ 60°C for 96 hours 95% RH; ASTM D1001
Mask TypePolyester

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PCHOME095 / 28317

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