The Effect of Surface Treatment of PET Films on Adhesive Properties

Abstract

In this work we studied the effect of surface treatment of PET films, which are widely used in food packaging, on the adhesion value of ink layers based on polyvinyl chloride. To give high barrier properties to packaging laminates, the films used in their structure are coated with a nanolayer of aluminum oxide (AlOx). However, these films have a disadvantage associated with the low adhesion of adhesive and ink layers to the AlOx nanolayer. To eliminate this disadvantage, aluminium oxide nanolayer is additionally coated with various polymer coatings. In this work we studied the effect of a polyacrylic coating applied on top of an AlOx layer on improving the adhesion of ink layers. For PET films used in food packaging, optical and surface properties are also important. In this regard, additionally we measured surface free energy, coefficient of friction, and optical properties of the studied PET films. We also highlight the relationship of contact angles of wetting and the work of adhesion for the printing ink with the measured adhesion of ink layers.

Electret Properties of PET /AlOx Films with Protective Coating Based on Acrylic Copolymers

“…Перспективными упаковочными материалами являются пленки из полиэтилентерефталата (ПЭТФ) с нанослоями из оксидов алюминия (AlO x ) благодаря высоким прочностным свойствам, хорошим барьерным характеристикам, низкой кислородопроницаемости, а также стойкости к процессу стерилизации [9,10]. Электретные свойства этого материала были изучены в работе [9].…”

The Impact of Underlying Opaque White Coating Parameters on Flexographic Print Quality

“…One of the key parameters that determine the print quality is the adhesion of the ink to the printing substrate [14]. The surface tension of the film significantly affects the white ink lay down and uniformity of the layer [15]. Treating the substrate prior to printing increases its surface tension.…”

Effect of the Type of Adhesives on the Properties of Multilayer Packaging Material Based on PET/AlOx Film with Acrylic Coating before and after the Sterilization Process

“…To solve this problem, we have developed an acrylic protective coating (Pr), applied over a layer of aluminum oxide. [7]. The use of a protective coating leads to a significant improvement in the resistance of the PET/AlOx film to mechanical deformation.…”