Description
UVACRIL M255 is a UV-curing solvent-free acrylate copolymer.
Application
UVACRIL M255 is a pressure sensitive adhesive that is applied in molten form and then crosslinked by exposure to UV light. Recommended applications: labels (film and paper permanent labels), tapes (double-sided, medical, insulating and speciality tapes), graphics.
The degree of crosslinking and thus the adhesive properties can be modified by varying the UV exposure: high exposures increase shear strength, while low exposures yield higher tack and lower shear strength. 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 - 35,000 |
Handling
UVACRIL M255 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 upon 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 180 g/m2 should not be exceeded. The photoinitiatior is incorporated in the product, additional photoinitiators are not recommended and may have negative effects on the performance of the product.
Packaging
The product is supplied in fiber drums (190 kg).
Storing
Store at room temperature, in closed containers, far from heat sources and direct sunlight.
Use within 12 months from production date (unopened and in the original packaging).
| Mod. DT3002E | Creation date: 5/24/2024 | Revision: 2 | Revision date: 2 Jul 2024 |
Above information is reliable, but does not constitute warranty.
