LDPE
Low-Density Polyethylene
Glass Transition (Tg)
-110 °C
Melting Point (Tm)
105–115 °C
Density
0.910–0.925 g/cm³
CAS Number
9002-88-4
Recycling Code
♺ 4
Category
Commodity
Repeat Unit
–[CH₂–CH₂]ₙ– (long-chain branched)
The repeating unit is the smallest structural fragment whose repetition builds the whole chain. Subscripts show the relative share of each unit in copolymers.
Key Properties
Highly branched, flexible, excellent clarity in film, outstanding processability, low tensile strength.
Applications
Shrink and stretch film, squeeze bottles, wire insulation, lids.