• Description for 3M 7993MP Membrane Switch Spacer

    Single side spacers aid in the construction of membrane switch circuitry, i.e. to protect leads, hold domes in place, or build your own spacer.

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Sheet
    Substrate Aluminum, Plastic: PET, Metal, Plastic, Polycarbonate, Polyester, Stainless Steel
    Industry Construction of membrane switch circuitry, i.e. to protect leads, hold domes in place, or build your own spacer
    Manufacturer 3M
    Chemistry Hi-Performance Acrylic
    Ozone Resistance Ozone resistance
    Chemical Resistance Excellent, mild acids, alkalies, oil, gasoline, kerosene, JP-4 fuel, cleaning solutions, germicidals
    Relative Solvent Resistance Chemical Resistance: Excellent Solvent
    High Temperature Resistance (°C) 149
    Other Resistance Oxidation resistance
  • Technical Data

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  • Best Practices

    *See Terms of Use Below

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Peel Strength Test Methods
Peel Strength Type Substrate Test Time Test Temperature Test Method
40 (oz./in.) 90° Peel Strength PET/Stainless Steel 20 min ASTM D3330
36 (oz./in.) 90° Peel Strength PET/Aluminum 20 min ASTM D3330
36 (oz./in.) 90° Peel Strength PET/PET 20 min ASTM D3330
38 (oz./in.) 90° Peel Strength PET/Polycarbonate 20 min ASTM D3330
68 (oz./in.) 90° Peel Strength PET/Stainless Steel 4,320 min 22°C ASTM D3330
64 (oz./in.) 90° Peel Strength PET/Aluminum 4,320 min 22°C ASTM D3330
46 (oz./in.) 90° Peel Strength PET/PET 4,320 min 22°C ASTM D3330
51 (oz./in.) 90° Peel Strength PET/Polycarbonate 4,320 min 22°C ASTM D3330
82 (oz./in.) 90° Peel Strength PET/Stainless Steel 4,320 min 70°C ASTM D3330
79 (oz./in.) 90° Peel Strength PET/Aluminum 4,320 min 70°C ASTM D3330
72 (oz./in.) 90° Peel Strength PET/PET 4,320 min 70°C ASTM D3330
62 (oz./in.) 90° Peel Strength PET/Polycarbonate 4,320 min 70°C ASTM D3330
Tensile Strength Test Methods
Tensile Strength Test Temperature Test Method
3,609 psi 22°C ASTM D2370
Moisture/Humidity Resistance Test Methods
Moisture/Humidity Resistance Test Method
Moisture resistance
7 (days)
Humidity Resistance
Dielectric Constant Test Methods
Dielectric Constant Temperature Test Method
2.77 22°C ASTM D150
Dielectric Strength Test Methods
Dielectric Strength Test Method
1,700 V/mil ASTM D149 (Short time method (air))
Dissipation Factor Test Methods
Dissipation Factor Temperature Test Method
0.01200 22°C ASTM D150
Insulation Resistance Test Methods
Insulation Resistance Test Method
6.5 x 10(12) (Ohms) Mil-I-46058C (100VDC, 60 sec.)
Surface Resistivity Test Methods
Surface Resistivity Temperature Test Method
> 5.6e16 (Ohms) 22°C ASTM D257
Volume Resistivity Test Methods
Volume Resistivity Temp (°C) Test Method
2.7e15 (Ohm-cm) 22°C ASTM D257
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Temperature (°C) CTE Test Method
4.5e-4 (M/M/°C) 25 to 175°C ASTM D696