Description
UVACRIL M26 is a UV-curing solvent-free acrylate copolymer.
Application
UVACRIL M26 is used for pressure-sensitive adhesives that are applied in molten form and then crosslinked by exposure to UV light. Suggested applications: labels (filmic and paper permanent labels), tapes (double-sided, medical, insulating and speciality tapes).
The degree of crosslinking and thus the adhesive properties can be modified by varying the UV exposure: high exposures give greater shear strength, while low exposures gives higher tack and lower shear strenth. Small deviations in the chosen radiation dosage have little effect on the adhesive properties.
Technical Specifications
| Method of analysis | MU | Standard | |
|---|---|---|---|
| 1 | Total Solids | % | > 99 |
| 106 | Viscosity at 150 °C | mPa.s | 20,000 - 30,000 |
Handling
UVACRIL M26 can be processed in conventional hot melt adhesive coating machines at 110-140°C. After application, the product must be exposed to UV light (conventional medium-pressure mercury vapour lamps or microwave-excited UV lamps are suitable). The most effective wavelength range is between 220 and 280 nm. Since irradiation is usually carried out from one side only, a slight gradient in crosslinking density in the coating sets in (obviously depending on the coating weight); therefore coatings produced under identical conditions, except direct and transfer process, can exhibit different adhesive properties. To avoid crosslinking gradient, a coating weight of maximum 100 g/m2 should not be exceeded.
Storing
Use within 12 months from production date (unopened and in the original packaging).
Notes
Glass transition temperature Tg (DSC) : -39°C
| Mod. DT3002E | Creation date: 3/6/2012 | Revision: 2 | Revision date: 26 May 2020 |
Above information is reliable, but does not constitute warranty.
