The causes and improvement methods of edge interference (rainbow pattern) in PET coatings In the field of packaging materials, polyethylene terephthalate (PET) is widely used due to its excellent performance. However, in the actual production process, sometimes a phenomenon called “rainbow stripes” may appear at the edge of the PET coating. This phenomenon manifests as visual effects such as uneven color and changes in light and shadow on the surface…
PET (Polyethylene Terephhalate) is a synthetic polymer widely used in the packaging and textile industries. It has various excellent performance, making it widely used in different fields. This article will provide a detailed introduction to the characteristics of PET and its specific applications in various industries. The basic properties of PET: 1. Chemical structure and composition. PET is synthesized by esterification of terephthalic acid and ethylene glycol. Its molecular formula…