Low-Density Polyethylene (LDPE) is a thermoplastic polymer characterized by a branched molecular structure that gives it flexibility and toughness despite relatively modest stiffness. It is widely used in flexible packaging, films, tubing, and containers where impact resistance and elongation are critical; engineers select LDPE over more rigid plastics (like HDPE or PP) when part deformation and stress distribution are preferred over dimensional stability, and it remains a production workhorse due to its low cost, processability, and chemical resistance.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Elongation at Break(εf) | 372.1 | - | — | ||
Flexural Strength (MOR)(σf) | 1.376 | ksi | — | ||
Hardness (Vickers)(HV) | 24.35 | HV | — | ||
Ultimate Tensile Strength(σUTS) | 1.840 | ksi | — | ||
Young's Modulus(E) | 28.40 | ksi | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Glass Transition Temperature(Tg) | -67.40 | °F | — | ||
Melting Point / Solidus(Tm) | 232.1 | °F | — | ||
Maximum Service Temperature(Tmax) | 775.4 | °F | — | ||
Thermal Conductivity(k) | 0.3786 | BTU/(hr·ft·°F) | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 2.700 | eV | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Refractive Index(n) | 1.511 | - | — |