The scheme of the process of co-extrusion is shown in Figure 3.1 , where the two layers after their co-extrusion into a single package at 300 C are cooled down by heat convection in the surrounding ...
Biopolymers like PLA and PHA are able to meet sustainability goals while also delivering the performance attributes needed in rigid food packaging. Here’s what testing has shown.
A somewhat similar process is used for a tri-layer film (Figure 3.2). After co-extrusion under a very high pressure through a circular device, the bi-layer (or tri-layer) film shaped into a circular ...