Premium 9 mil double-coated membrane switch spacer with High Performance Acrylic Adhesive 200MP on polyester film carrier. Excellent shear strength, temperature resistance to 400°F, and precision edge retention for efficient die-cutting.
The 3M™ Membrane Switch Spacer 7959MP is a premium double-coated adhesive spacer designed for high-performance membrane switch applications. This 9 mil thick spacer features 3M™ High Performance Acrylic Adhesive 200MP applied at 2 mils on each side of a 5 mil polyester film carrier, providing excellent shear strength and durability. The product is engineered to withstand repeated stress of switch actuation while maintaining precise, clean edges for efficient die-cutting and slitting operations.
This membrane switch spacer is constructed with double 4.2 mil, 58 lb. polycoated kraft (PCK) paper lay-flat liners that resist humidity, curling, tunneling, and buckling. The liners add dimensional stability for various die-cutting operations and enable improved rotary die-cutting at high speeds. The adhesive formulation resists oozing at edges, reducing waste and accelerating part processing. The spacer delivers outstanding temperature resistance up to 400°F (204°C) short-term, excellent solvents and UV resistance, and performs reliably after exposure to humidity and hot/cold cycles.
Ideal for membrane switch spacers, switch mounting, circuit layer assembly, metal dome placement, lead protection, and die-cut laminations, the 7959MP is the industry-standard choice for applications ranging from farm tractors and medical test systems to microwave ovens and fish finders. The product is supplied in sheet configuration for industrial and occupational use, with an 18-month shelf life and smallest saleable unit of one sheet.
Key Features
- 9 mil total thickness with double-coated High Performance Acrylic Adhesive 200MP for superior shear strength
- 2 mil adhesive on each side delivers excellent bonding to plastics and smooth surfaces with minimal edge oozing
- 5 mil polyester film carrier provides structural strength and stability
- Double 4.2 mil polycoated kraft paper liners resist humidity, curling, and buckling for improved processing
- Temperature resistance up to 400°F (204°C) short-term with excellent UV and solvent resistance
- Precision edge retention enables faster slitting and die-cutting with minimal waste
- Lay-flat liner design enables high-speed rotary die-cutting and improved sheet processing
- Ideal for membrane switches, switch mounting, circuit layer assembly, and metal dome placement
Technical Specifications
| Specification |
Value |
| Product Number | 7959MP |
| 3M ID | 7100072989 |
| Total Tape Thickness without Liner | 9 mil (0.23 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) |
| Backing Material | Polyester Film (PET) |
| Backing Thickness | 5 mil (0.13 mm) |
| Primary Liner | 58# Polycoated Kraft Paper (PCK), 4.2 mil (0.11 mm), Tan |
| Secondary Liner | 58# Polycoated Kraft Paper (PCK), 4.2 mil (0.11 mm), Tan |
| Product Color | Transparent |
| Maximum Operating Temperature | 400°F (204°C) short-term |
| Minimum Operating Temperature | -40°F (-40°C) |
| Indoor/Outdoor Use | Indoor/Outdoor |
| Shelf Life | 18 months |
| Smallest Saleable Unit | Sheet |
| Brand | 3M™ |
| Industries | Aerospace, Appliance, Automotive, Electronics, General Industrial, Medical, Military & Government, Transportation |
| Recommended Applications | Membrane switch spacers, switch mounting, circuit layer assembly, metal dome placement, lead protection, die-cut laminations |
| Adhesion Performance | Outstanding adhesion to metal, polycarbonate (PC), ABS, and polyester (PET) with excellent humidity and thermal cycle resistance |
Order 3M Membrane Switch Spacer 7959MP Clear 9 mil Sheet at wholesale prices for companies and factories in Iraq and Middle East, get the best deals on bulk purchases, contact us today.
