3M 76970 and 3M 76971 have been specially developed for tamper-evident labeling. They are equipped with a hidden “triangle symbol” that clearly detaches from the foil during removal attempts and remains adhered to the substrate. On the foil, this symbol appears as a void, and labels made from this material cannot be transferred undamaged. 3M 76970 and 3M 76971 are equipped with an acrylic adhesive and are also suitable for bonding to low-energy substrates.
Brief description / shipping label:
3M 76970 3M TT5 MW PET 50 Triangles-350E/20-90WG
3M 76971 3M TT5 MS PET 50 Triangles-350E/20-90WG
Material: Polyester
| Product | Color | Foil thickness in mm | Adhesive thickness in mm | Release liner in mm (g/m²) | Release liner |
|---|---|---|---|---|---|
| 76970 | White, matte | 0,053 | 0,020 | 0,077 (90) | Glassine paper, silicone-coated on one side |
| 76971 | Silver, matte | 0,053 | 0,020 | 0,077 (90) | Glassine paper, silicone-coated on one side |
| Temperature resistance (bonded to aluminum) | -40°C to +150°C no visible change |
| Opacity | covers high-contrast colors of the substrate |
| Substrate corrosion | does not cause corrosion on the bonded substrate |
| Adhesive | Self-adhesive on acrylate basis, series 350E |
| Adhesive type (according to DIN 30646) | PNS (permanently adhesive, low-temperature, special adhesive) |
| Liner | siliconized and compacted paper – especially for roll printing |
| Minimum application temperature | +5°C |
| Functionality of the “triangle symbol” | up to approx. +80°C |
| Shelf life | 2 years |
| Recommended storage conditions | in cool, sun-protected rooms at approx. 10-25°C and 35-65% relative humidity. |
3M 76970 has a higher light transmission due to the Triangle technology. This may require marking the protective paper so that the labels are recognized by the light barriers of the thermal transfer printer.
Bonding of substrates: See processing information KG-054
Adhesive strength (N/25 mm)
| Substrate | 76970 / 76971 (5085) |
| Glass (“Quick-stick” initial adhesion after 4 hours) According to FTM 9 (Finat) |
6 |
| Glass (after 48 hours) * | 6 |
* Measured according to Finat test method FTM 1 after 72 h storage at 23 °C.
The indicated adhesive strength values are average values. They are not suitable for specifications.
Resistance to chemicals and solvents
The foils are resistant to most mineral oils and greases, fuels, aliphatic solvents, weak acids, salts, and alkalis.
Careless peeling of the label from the release liner can lead to a so-called premature destruction effect. To avoid this, the foil should be peeled slowly, maintaining a peel angle of
90°. The strength of the “triangle” effect is significantly influenced by the adhesive strength to the substrate. Therefore, thorough cleaning of contaminated substrates is particularly important.
Rotary die-cutting is recommended. The loose winding of the label rolls avoids possible adhesive leakage.
UL/cUL approval: File MH18072
Anfrage / Zentrale
Folit GmbH
Im Moldengraben 47
70806 Kornwestheim
Anfrage / Zentrale
Tel: 07154-8225-80
Inquiry / Headquarters
Folit GmbH
Im Moldengraben 47
70806 Kornwestheim
Inquiry / Headquarters
Tel: 07154-8225-80
