Professional-grade 6 mil double-coated membrane switch spacer with High Performance Acrylic Adhesive 200MP, featuring excellent shear strength, precision edges, and superior environmental resistance for industrial applications.
The 3M™ Membrane Switch Spacer 7956MP is a premium double-coated adhesive spacer designed specifically for membrane switch applications requiring exceptional durability and precision. This 6 mil thick spacer features 3M's High Performance Acrylic Adhesive 200MP, which delivers outstanding shear strength and resists slippage and edge lifting during repeated switch actuation cycles. The product comes in sheets measuring 24 inches by 36 inches, with 100 sheets per case, making it ideal for high-volume industrial manufacturing operations.
Constructed with a 2 mil polyester film carrier and 2 mil acrylic adhesive applied to each side, this membrane switch spacer provides excellent structural integrity while maintaining clean, precise edges for efficient slitting and die-cutting operations. The double-linered design features 4.2 mil, 58 lb. polycoated kraft paper liners that resist humidity, curling, tunneling, and buckling, ensuring optimal dimensional stability throughout storage and processing. This advanced liner system enables improved rotary die-cutting at high speeds and enhanced sheet processing capabilities.
The 3M™ Membrane Switch Spacer 7956MP is engineered to withstand extreme environmental conditions, including operating temperatures from -40°C to 204°C (up to 400°F short-term), making it suitable for diverse industrial applications. With an 18-month shelf life and resistance to solvents and UV exposure, this spacer is ideal for membrane switch construction, switch mounting, circuit layer assembly, metal dome placement, lead protection, and die-cut laminations across aerospace, automotive, electronics, medical, and general industrial sectors.
Key Features
- 6 mil double-coated spacer withstands repeated stress of switch actuation cycles
- 2 mil High Performance Acrylic Adhesive 200MP on each side delivers excellent shear strength
- Resists slippage, edge lifting, and adhesive oozing for precise die-cutting
- Double 4.2 mil polycoated kraft paper liners resist humidity, curling, and tunneling
- Operating temperature range -40°C to 204°C with UV and solvent resistance
- 2 mil polyester film carrier provides structural strength and dimensional stability
- Improved rotary die-cutting at high speeds with enhanced sheet processing
- Lay-flat liner design enables faster part processing and minimal waste
- Suitable for membrane switches, circuit assembly, and metal dome placement
- 18-month shelf life with consistent adhesive performance
Technical Specifications
| Specification |
Value |
| Product Number | 7956MP |
| Brand | 3M |
| Product Type | Double-Coated Membrane Switch Spacer |
| Overall Width | 24 inches (609.6 mm) |
| Overall Length | 36 inches (914.4 mm) |
| Total Thickness without Liner | 6 mil (0.15 mm) |
| Backing Material | Polyester Film (PET) |
| Backing Thickness | 2 mil (0.05 mm) |
| Adhesive Type | High Performance Acrylic Adhesive 200MP |
| Face Side Adhesive Thickness | 2 mil (0.05 mm) |
| Back Side Adhesive Thickness | 2 mil (0.05 mm) |
| Primary Liner Material | 58# Polycoated Kraft Paper (PCK) |
| Primary Liner Thickness | 4.2 mil (0.11 mm) |
| Primary Liner Color | Tan |
| Secondary Liner Material | 58# Polycoated Kraft Paper (PCK) |
| Secondary Liner Thickness | 4.2 mil (0.11 mm) |
| Secondary Liner Color | Tan |
| Product Color | Transparent/Clear |
| Maximum Operating Temperature | 204°C (400°F short-term) |
| Minimum Operating Temperature | -40°C (-40°F) |
| Shelf Life | 18 Months |
| Smallest Saleable Unit | Sheet |
| Units per Case | 100 sheets |
| Indoor/Outdoor Rating | Indoor/Outdoor |
| UPC Code | 50021200681887 |
| 3M ID | 7000001570 |
| Environmental Resistance | UV and solvent resistant |
| Humidity Resistance | Double PCK liners resist curling, tunneling, and buckling |
| Adhesive Performance | Excellent shear strength, resists oozing and edge lifting |
| Die-Cutting Capability | Improved rotary die-cutting at high speeds |
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