Ruco USA, Inc. Universal Cleaner 945 UV Screen Printing Ink 32 335

Application Fields Universal UV screen printing ink for the printing of container, suitable for substrates made of ABS, PC, PS, PVC, pre-treated Polyolefines such as PE/PP. Ink series 945 UV is suitable also for container made of PET and PETG, but limited suitable for PA. Substrates may differ in their chemical structure or method of manufacture. A test for suitability must always be carried out before printing. Antistatic, Mould Release Agents and Slip Additives may have negative effects on adhesion, and should be detected and removed prior to printing. Characteristics This UV ink series is very reactive in nature, assuring good curing and adhesion even when printing at machine speeds up to 5000 pieces/hour for all industrial screen printing machines. The inks of the series 945 UV are designed in high gloss, brilliant , good leveling and printability. The inks of the 945 UV series are constitutionally free from toxic elements and solvents. The raw materials used meet with the limits stipulated by the EEC regulation EN 71 (Safety of toys), part 3 (Migration of Certain Elements) of December 1994. Processing Instructions Pre-treatment In some cases of PET substrates the carefully flame pretreatment or CORONA-discharge is necessary, surface tension needs to be at least 40 mN/m. In case of PE, surface tension needs to be at least 42 mN/m, in case of PP at least 52 mN/m. A test for suitability must always be carried out before printing. Stencils/Printing Equipment Screen printing meshes between 120-31 threads/cm and 150-31 threads/cm are suitable for printing with 945 UV inks. The color mixing formulations are based on 165-34 threads/cm mesh. However, test prints and approval of the color are generally recommended for the respective print jobs. Any acrylic acid ester resistant squeegee material may be used. Curing Conditions The varying UV absorption of the individual colors results in a range of curing properties depending on color and opacity. All colors of the 945 UV series can be cured by the use of medium pressure mercury vapor lamps (at least 160 W/cm). The optimum energy output is 150-250 Millijoule/cm², measured with Kã¼hnast UV-Integrator under laboratory condition. UV curing is followed by a 12 hour post-cure phase after which the ink film is fully cured and has its final properties. However, it must be noted, that low radiation intensity, excessive machine speeds or excessive film thickness can have a negative influence on the curing properties and adhesion. Un-cured prints are considered a hazardous waste. Therefore, it is recommended to cure misprints under the UV lamp as a matter of principle. After curing, spoilage can be disposed by conventional methods and may be incinerated without causing any difficulties. Shelf Life A shelf life of or 12 months is guaranteed when storing the inks at 21ºC and in the original packing container. At higher storage temperatures the shelf life will be reduced. Precautions UV inks may cause irritations and can increase the sensitivity of the skin, possibly leading to hypersensitivity. Therefore, the use of disposable gloves and protective goggles is strongly recommended. For further information on the safety, storage and environmental aspects concerning these products, please refer to the Material Safety Data Sheet (MSDS). Additional technical information may be obtained from our staff of the Technical Application Department.