Polyolefin seal layer was incorporated into crystalline PET (CPET) rigid packages (e.g. trays) to better control the seal and peel performance. The adhesion bond between polyolefins to CPET is destructive and inseparable, which exceeds common means of bonding technology (e.g., adhesives or tie layers) and prevents delamination while peel strength can be tuned with different easy peel lidding options. This new product was also passed preliminary tests under retort and oven conditions. Regrind with PE surface was studied in order to reclaim flakes in the CPET manufacturing process and the compatibility of PE matrix with PET was further analyzed.
展开▼
