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0 item(s) - $0.00- Tape Catalog
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3M 8421 Polyester Tape
3M 8421 Polyester Tape
3M™ Polyester Tapes 8421 and 8422 are for the photographic industry for splicing most film for processing through the developing chemicals. Frequently used in chemical baths at 150°F (66°C). Excellent solvent and chemical resistance, especially those found in photographic processes. Aggressive rubber adhesive grabs quickly and adheres well to a variety of films. Hot caustics will weaken backing after prolonged immersion. 3M tape 8421 white backing is used to easily identify splices.
Applications: Pre-splicing of most photographic film for processing (thorough testing and evaluation is suggested due to varying processing baths); General wide web splicing, including butt splicing and core starting; Sealing, color-coding, protecting and edging where a higher tack rubber adhesive is needed; Defect marking
| Filename | Action |
| 3m-8421-8422-data-sheet.pdf | [ Download File ] |
| Tech Specs | |
| Backing | Polyester |
| Adhesive Type | Rubber |
| Total Thickness | 2.4 mils |
| Adhesion to Steel | 42 oz./in. width (46 N/100 mm) |
| Tensile Strength | 38 lbs./in. width (665 N/100 mm) |
| Elongation at Break | 125% |
| Operating Temperature | -60F (-50C) to 300°F (149°C) |
| Colors | Creamy white |
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