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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.Chemical Resistance Excellent, Chemical Resistance: Excellent Solvent, Chemical Resistance: Mild acids, Germicidals, Alkalies, Oil, Gasoline, Kerosene, JP-4 fuel, Cleaning solutions Application Type Bond, Laminating 1 Part or 2 Part 1-Part Material Form Sheet Substrate Aluminum, Metal, Plastic, Polycarbonate, Polyester, Stainless Steel, PET 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 Application Temperature (°F) 70 to 100 Ozone Resistance Ozone resistance Oxidation Resistance Oxidation resistance High Temperature Resistance (°C) 149 Volume Resistivity (O) 2.7e15 (Ohm-cm) -
Technical Data for 3M 7993MP Membrane Switch Spacer
Overview
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Chemical Resistance
- Chemical Resistance - Excellent, Alkalies, Oil, Gasoline, Kerosene, JP-4 fuel, Cleaning solutions, Germicidals
- Chemical Resistance : Relative Solvent Resistance - Excellent Solvent
- Chemical Resistance : Acid Resistance - Mild acids
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Application Type
- Laminate - Laminating
- Adhesive - Bond
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1 Part or 2 Part
- 1-Part
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Material Form
- Other - Sheet
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Substrate
- Metal
- Aluminum
- Plastic
- Polycarbonate
- Polyethylene Terephthalate (PET) - PET
- Polyester
- Stainless Steel
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Industry
- Electronics - Construction of membrane switch circuitry, i.e. to protect leads, hold domes in place, or build your own spacer
- Industrial
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Chemistry
- Acrylic - Hi-Performance Acrylic
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Cure Method
- None
Specifications
Cure Specs
Application Temperature (°F) 70 to 100 Bond Strength
General Bond Strength (psi) High Peel Strength (piw) 40 (oz./in.), 36 (oz./in.), 36 (oz./in.), 38 (oz./in.), 68 (oz./in.), 64 (oz./in.), 46 (oz./in.), 51 (oz./in.), 82 (oz./in.), 79 (oz./in.), 72 (oz./in.), 62 (oz./in.) Test Method Shear Strength (psi) Excellent Cleavage Strength (psi) High Tensile Strength (psi) 3,609 Test Method Material Resistance
Ozone Resistance Ozone resistance Oxidation Resistance Oxidation resistance UV Resistance UV resistance High Temperature Resistance (°C) 149 Moisture/Humidity Resistance Moisture resistance, 7 (days), Humidity Resistance Test Method Conductivity
Dissipation Factor 0.01200 Test Method Insulation Resistance (O) 6.5 x 10(12) (Ohms) Test Method Dielectric Strength (V/mil) 1,700 Test Method Dielectric Constant 2.77 Test Method Surface Resistivity (O) > 5.6e16 (Ohms) Test Method Volume Resistivity (O) 2.7e15 (Ohm-cm) Test Method Other Properties
Coefficient of Thermal Expansion (CTE) 4.5e-4 (M/M/°C) Test Method Business Information
Shelf Life Details It is suggested that products are stored at room temperature conditions of 70°F (21°C) and 50% relative humidity.;If stored properly, product retains its performance and properties for 18 months from date of shipment. Shelf Life Temperature (°F) 70 Shelf Life Type From date of shipment. Shelf Life (mon) 18 -
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Best Practices for 3M 7993MP Membrane Switch Spacer
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Surface Preparation
To obtain best adhesion, the bonding surfaces must be clean, dry, and smooth. Some typical surface cleaning solvents are isopropyl alcohol or heptane.
Carefully read and follow the manufacturer’s precautions and directions for use when working with solvents.
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Application
Initial tape application to surfaces at temperatures below 50°F (10°C) is not recommended because the adhesive becomes too firm to adhere readily. However, once properly applied, low temperature holding is satisfactory.
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Comparable Materials for 3M 7993MP Membrane Switch Spacer
Spec Engine® Results
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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 |
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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 |
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> 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 |