Low-density polyethylene (ldpe) is a thermoplastic made from petroleum. It was the first grade of polyethylene, produced in 1933 by imperial chemical industries (ici) using a high pressure process via free radical polymerization. Its manufacture employs the same method today. Ldpe is commonly recycled and has the number “4″ as its recycling symbol.
RP Plastic recycles all LDPE materials, including things like children’s toys, squeeze bottles, container lids, and wire cable coverings. LDPE is typically used for things like molded lab equipment. While LDPE has many uses, it primarily is applied for plastic bags and pliable plastic parts.
Examples of known LDPE uses include:
- trays and general purpose containers
- food storage and laboratory containers
- corrosion-resistant work surfaces
- parts that need to be weldable and machinable
- parts that require flexibility, for which it serves very well
- very soft and pliable parts
- six pack rings
- playground slides
- plastic wraps