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LDPE Film/Sheet
Available Configurations
Properties common to all products in this list
| Thickness | Size | Structure |
|---|---|---|
| 0.0125 mm to 3 mm | 10 x 10 mm to 500 x 500 mm | Biaxially oriented |
Need custom configurations? Please contact us.
Key Features
LDPE Film (low-density polyethylene) is a branched polyolefin film characterized by exceptional flexibility, outstanding moisture barrier performance, and low-temperature capability:
Exceptional Flexibility
Elongation at break of 400% and the characteristically soft, compliant behavior make LDPE the reference flexible polyolefin film for applications requiring formability, sealing, and deformation tolerance. Tensile strength of 5–25 MPa and tensile modulus of 0.1–0.3 GPa reflect this inherently flexible character.
Outstanding Moisture Barrier
Near-zero water absorption of 0.015% over 24 hours provides reliable moisture barrier performance across food packaging, construction vapor barrier, and agricultural film applications where moisture ingress must be reliably prevented.
Low-Temperature Capability
Retained flexibility and impact toughness at temperatures down to −60 °C extend applicability to cold-climate agricultural and construction vapor barrier applications where other films embrittle. Upper working temperature reaches 50–90 °C.
Good Electrical Insulation
Volume resistivity of 10¹⁵–10¹⁸ Ω·cm and dielectric strength of 27 kV/mm support wire and cable insulation jacket applications alongside the film’s primary packaging and barrier roles.
Heat-Sealable at Low Temperatures
Low-temperature heat-seal capability and soft, compliant surface make LDPE the standard heat-sealable inner layer in multilayer packaging laminates where sealing to other film substrates is required at minimal thermal input.
Industrial Applications
LDPE Film is used across food and consumer packaging, agriculture, construction, and cable insulation wherever flexibility, moisture barrier performance, and low-temperature capability determine material selection:
- ✦ Flexible Food and Consumer Packaging
- The dominant flexible packaging film for food and consumer goods, where the combination of moisture barrier performance, heat-seal capability, and low cost qualifies LDPE across a wide range of packaging applications.
- ✦ Agricultural Mulch and Tunnel Films
- Applied as agricultural mulch film and tunnel covering where low-temperature flexibility, UV stability in stabilized grades, and moisture barrier performance support crop production and soil management.
- ✦ Construction Vapor Barriers and Damp-Proof Membranes
- Used as construction vapor barriers and damp-proof membranes where near-zero moisture absorption and retained flexibility at low ambient temperatures provide long-term barrier integrity in building envelopes.
- ✦ Wire and Cable Insulation Jackets
- Applied as cable insulation jacket material where good dielectric properties and flexible, compliant behavior support reliable electrical insulation in general wiring applications.
- ✦ Heat-Sealable Inner Layers in Multilayer Packaging Laminates
- Used as the heat-sealable inner layer in multilayer packaging laminates where low-temperature seal initiation and adhesion to adjacent film substrates are both required.
- ✦ Surface Treatment, Coating Adhesion and Polymer Crystallization Research
- Serves as a model flexible polyolefin substrate for surface treatment, coating adhesion, and wettability studies, as a low-cost chemically resistant liner in electrochemical cell fabrication, and for polymer crystallization investigations and packaging barrier property benchmarking.
Material Properties
| Element | Value |
|---|---|
| Acids - concentrated | Good-Fair |
| Acids - dilute | Good |
| Alcohols | Good |
| Alkalis | Good |
| Aromatic hydrocarbons | Fair-Poor |
| Greases and Oils | Good-Fair |
| Halogenated Hydrocarbons | Fair-Poor |
| Halogens | Fair-Poor |
| Ketones | Good-Fair |
| Element | Value |
|---|---|
| Dielectric constant @1MHz | 2.2-2.35 |
| Dissipation factor @ 1MHz | 1-10x 10⁻⁴ |
| Dielectric strength( kV mm⁻¹ ) | 27 |
| Surface resistivity( Ohm/sq ) | 10¹³ |
| Volume resistivity( Ohmcm ) | 10¹⁵-10¹⁸ |
| Element | Value |
|---|---|
| Flammability | HB |
| Radiation resistance | Fair |
| Refractive index | 1.51 |
| Resistance to Ultra-violet | Poor |
| Limiting oxygen index( % ) | 17 |
| Water absorption - over 24 hours( % ) | 0.015 |
| Density( gcm⁻³ ) | 0.92 |
| Element | Value |
|---|---|
| Hardness - Rockwell | D41-46 - Shore |
| Elongation at break( % ) | 400 |
| Tensile modulus( GPa ) | 0.1-0.3 |
| Izod impact strength( J m⁻¹ ) | 1000 |
| Tensile strength( MPa ) | May-25 |
| Element | Value |
|---|---|
| Heat-deflection temperature - 0.45MPa( C ) | 50 |
| Heat-deflection temperature - 1.8MPa( C ) | 35 |
| Lower working temperature( C ) | -60 |
| Upper working temperature( C ) | 50-90 |
| Specific heat( J K⁻¹ kg⁻¹ ) | 1900-2300 |
| Thermal conductivity( W m⁻¹ K⁻¹ ) | 0.33@23°C |
| Coefficient of thermal expansion( x10⁻⁶ K⁻¹ ) | 100-200 |
Tolerances
| Thickness | ±20% | |
|---|---|---|
| Linear dimension | <100mm | ±1mm |
| Linear dimension | >=100mm | +2 / -1% |