Pad printing for glasses

Pad printing for glasses The reason why the printing for glasses adopt the method of pad printing is that printing pad could do the process of printing on the spherical and smooth products with spherical and smooth surface, while the laser printing will break the surface of glasses. Apart from that, in terms of cost, the price of laser printing machine is between 100-200 thousand yuan, while the price of pad printing machine is only around 15 thousand yuan, which has an big advantage. we should take the followings into consideration.   The selection of printing ink The selection of printing ink occupies a very important position, which relates to the broad usage of pad printing. Because the spectacle frame is made of metal, which demand that the printing ink have a good adhesive force on the metal surface. The bi-component printing ink prevails nowadays and its drying method is usually stoving. The printing for glasses uses glass printing specialized ink, which is also bi-component and dried by stoving. The bi-component printing ink is featured with high hardness and good adhesive force when it gets cured, though its operation may be somewhat complex.   Printing pad It is very crucial to select a appropriate printing pad. At first, the printing pad should printed in the designated spot of the product. Secondly, the printing pad need to be resilient enough in case of being deformed. Because the printing area of the spectacle frame is narrow, the printing pad should be somewhat cuspidal. According to experiment, A7 pad with the cross sectional area of 38mm² is appropriate.   Pad printing machine Though printing area of spectacle frame is narrow, it is only used for the pattern of trademark, no complicated patterns involved. So selecting pad printing machine with monochrome and small size is just OK. In the series of Hongye silicon rubber, there is printing pad silicone suitable for pad printing for glasses. please browse the following product performance parameter sheet:       Model 901 902 912 916 918 933 Color white white white white white/ semitransparent White/red Vulcanization Type Condensation vulcanization Condensation vulcanization Condensation vulcanization Condensation vulcanization Condensation vulcanization Addition cure vulcanization Hardness( A°) 30±2 30±2 30±2 14±2 30±2 34±2 Mixing Ratio(A:B) 100:2-100:3 100:2-100:3 100:2-100:3 100:2-100:3 100:2-100:3 9:1 Viscosity(mPa) 32000±2000 35000±2000 32000±2000 36000±2000 33000±2000 18000±2000 Tensile Strengh (MPa) 3.8 4.0 4.0 3.5 4.2 3.0 Tear Strengh(kN/m) 22±2 24±2 25±2 25±2 27±2 8 Elongation(℅) 380 430 340 570 320 350 Operating Time(min) 30-40 30-40 30-40 30-40 30-40 10-20 Vulcanizing Time(h) 3-4 3-4 3-4 3-4 3-4 2-4 Linear Shrinkage(℅) ≤0.3 ≤0.3 ≤0.3 ≤0.3 ≤0.3 ≤0.1     If you need more information about our company and product, please visit our website :www. szrl. net, or you can send us email right now at info@szrl.net.