Another study investigated the effects of film tension and contamination on the seal quality of flexible food packaging films made from polypropylene and low-density polyethylene blends.

(The Hill) — Plastic food packaging contains chemicals that ... of polyurethane (PUR), polyvinyl chloride (PVC) and low-density polyethylene (LDPE). LDPE is a common polymer used in Ziploc ...

PET (or PETE) Polyethylene terephthalate Clear drinks bottles, food packaging such as fruit punnets ... Not generally collected from households for recycling. PVC use in packaging is in decline. LDPE ...