Low-density polyethylene (LDPE)
LDPE (the first grade of polyethylene) is a thermoplasticmade from the monomerethylene. It contains the chemical elements carbon andhydrogen. It is characterized by its short and long chain branching which gives it good clarity and processability although it does not have the strength properties of the other PEs. So, its intermolecular forces are weaker, its tensile strength is lower, and its resilienceis higher. Also, since its molecules are less tightly packed and less crystalline because of the side branches, its densityis lower.
LDPE has Excellent resistance (no attack) to dilute and concentrated acids, alcohols, bases and esters, good resistance (minor attack) toaldehydes, ketones and vegetable oils, limited resistance (moderate attack suitable for short-term use only) to aliphaticandaromatichydrocarbons, mineral oils, and oxidizing agents, and poor resistance, and not recommended for use with halogenated hydrocarbons.
meat and poultry wrapping
waste bin liners
snacks and sweets
frozen food bags and baked goods
bags and bakery film
Coatings to paper and paperboard products for packaging of liquids such as milk and fruit juices
A moisture barrier to paper and woven cloth.
Coating of foil to provide a heat-seal layer in multilayer film structures
Household goods, toys and sporting goods, Playground slides, caps and closures, and medical appurtenances. Parts of computer hardware, such as hard disk drives, screen cards, and optical disc drives
Compounds based on LDPE can be used in insulation and jacketing materials for wire and cable applications as well as the sheathing of telecommunication cables.