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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.Application Type Bond, Laminating 1 Part or 2 Part 1 Part Material Form Sheet Substrate Aluminum, 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 for 3M 7993MP Membrane Switch Spacer
Overview
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Application Type
- Laminate - Laminating
- Adhesive - Bond
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1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
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Material Form
- Other - Sheet
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Substrate
- Metal
- Aluminum
- Plastic
- Polyethylene Terephthalate (PET) - PET
- Polycarbonate
- 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 Chemical Resistance Excellent, mild acids, alkalies, oil, gasoline, kerosene, JP-4 fuel, cleaning solutions, germicidals Relative Solvent Resistance Chemical Resistance: Excellent Solvent UV Resistance UV resistance High Temperature Resistance (°C) 149 Moisture/Humidity Resistance Moisture resistance, 7 (days), Humidity Resistance Test Method Other Resistance Oxidation resistance 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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BOSC132-59(Bostik)A water-dispersible aliphatic polyisocyanate. When added to reactive aqueous polymeric dispersions, such as polyurethanes, polychloroprenes and acrylics, Boscodur 132 will react under ambient conditions to increase molecular weight, thereby improving the resistance of the adhesive bonds to moisture, heat, chemicals and solvents.
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BOSC80-GA-73(Bostik)
A solvent-free, water dispersible aliphatic polyisocyanate.
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5830(3M)A multi-sheeted adhesive system that removes dirt and contaminants from shoe soles, wheels and other passing objects on contact. Comprised of a thin adhesive backed base topped by 30 or 60 removable adhesive polyethylene sheets that lock dirt in place until discarded.
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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 |
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