low-density polyethylene

Low-density polyethylene (LDPE) is a semi-crystalline thermoplastic polymer characterized by a branched molecular structure that gives it flexibility and impact resistance at ambient temperatures. It is widely used in flexible packaging films, plastic bags, tubing, and squeeze bottles across the food, pharmaceutical, and consumer goods industries, where its combination of processability, chemical resistance, and low cost make it the preferred choice over more rigid or expensive alternatives. Engineers select LDPE when flexibility, ease of processing, and cost-effectiveness are priorities, though its lower stiffness and heat resistance compared to high-density polyethylene limit its use in structural or high-temperature applications.