Budnick Converting ®
3M
8421
Polyester Tape
A 2.5 mil polyester tape for the photographic industry for splicing most film for processing through the developing chemicals. Also excellent for most general wide web splicing. Excellent solvent and chemical resistance, especially those found in photographic processess. Hot caustics will weaken backing after prolonged immersion.
Converting Services
- Precision Cutting
- Die Cutting
- Slitting
- Printing
- Laminating and Coating
- Spooling and Finishing
- Consulting & Process Audit
- Prototyping
- Inventory Management
At Budnick, we specialize in custom converting these materials into labor saving, user-friendly parts.
| Backing/Carrier | PET - Polyester |
|---|---|
| Adhesive | Rubber |
| Thickness | 2.5 Mils |
| Tensile | 43.00 lbs/in |
|---|---|
| Elongation | 140.00% |
| Adhesive Activation | Pressure |
| Adhesion (unwind) | 50 oz/in |
| Min. Application Temp | 60° F |
|---|---|
| Min. Service Temp | 0° F |
| Max Short-Term Temp | 300° F |
| Max Long-Term Temp |
Product Features
- Temperature use range = frequently used in chemical baths at 150°F
- Polyester backing had great chemical resistance and abrasion & thermal stability
- Rubber adhesive has excellent shear strength and chemical resistance
- Reduces failures due to breakage and shrinkage
- Reduces splice failure due to slippage
- Reduces failure due to undercutting
- Triggers sensing devices for faster handling
Adhesive Tape Applications
- Pre-splicing of most photographic film for processing (thorough testing and evaluation is suggested due to varying processing baths)
- General wide web splicing
- Sealing, labeling, protecting and edging where a higher tack crude rubber adhesive is desirable
Adhesive Tape Colors
- Cream
Data provided by Budnick Converting, Inc.
The physical properties listed are typical values and are not to be considered as specifications. Our suggestions for use are based on tests we believe to be reliable. However, the purchaser must carry out their own tests to determine the suitability of the product for their internal use. Information is given in good faith, but without warranty.
It is essential, as with all pressure-sensitive tapes, that the surface to which the tape is applied be clean, dry and free of grease and oil.
Shelf life from date of manufacture is based on the product being stored at 70°F(21°C) / 50% relative humidity out of direct sunlight.
Specification compliance is dynamic and should only be used as a general guide. Always confirm that the tape you are interested in currently complies with all specification requirements. Please verify that the product number that you select is available in the proper size and color to meet your specification.