Search

Featured Application: An improvement in adhesion (gluing) in the printing production process. In this study, the effect of air plasma on the surface properties of printed and coated cardboard was investigated. The material was activated by low-pressure cold plasma for 1, 10, 20, and 30 s. Wettability changes on the surface were examined by contact angle measurements using the sessile droplet technique. The differences in the surface free energy were calculated using the Lifshitz–van der Waals/acid–base and Contact Angle Hysteresis approaches. Optical profilometry was used for the surface roughness evaluation and an X-ray photoelectron spectroscopy analysis was performed to find changes in surface chemistry. Adhesive strength tests were carried out to estimate the adhesion changes after the material's modification. It was found that the water and formamide contact angles increased after the plasma treatment while the diiodomethane contact angle did not change. As a result of the modification, the surface free energy also increased significantly and the surface roughness increased. The pull-off tests confirmed the improvement in the material's surface properties. Moreover, it was demonstrated that the optimal effect can be obtained after just 10 s of the plasma process. [ABSTRACT FROM AUTHOR]

Paper and prints on it are analyzed as composite materials. Printing, varnishing and lamination are described in terms of the formation of the composite material. The article discusses why and how the properties of a print should differ from the properties of paper.Article in Lithuanian

Paper and prints on it are analyzed as composite materials. Printing, varnishing and lamination are described in terms of the formation of the composite material. The article discusses why and how the properties of a print should differ from the properties of paper. Santrauka Popierius ir atspaudai analizuojami kaip kompozicinės medžiagos. Aprašomas atspaudų spausdinimas kaip kompozicinės medžiagos susidarymo procesas spausdinant, lakuojant ir laminuojant. Aptariama, kodėl ir kaip turėtų keistis atspaudo savybės, lyginant su popieriumi. Raktiniai žodžiai: kompozicinė medžiaga; popierius; popieriaus fizikinės savybės

Paper and prints on it are analyzed as composite materials. Printing, varnishing and lamination are described in terms of the formation of the composite material. The article discusses why and how the properties of a print should differ from the properties of paper. [ABSTRACT FROM AUTHOR]