HDPE sheets HDPE sheets HDPE sheets HDPE sheets
PE 300 / HDPE Sheets
High-Density Polyethylene (HDPE) Sheets – HDPE, a linear polymer, is derived from ethylene through a catalytic process, resulting in a structure without branching. This closely packed, high-density material offers enhanced chemical resistance compared to LDPE.
HDPE Sheets (PE300) are characterized by their increased hardness and opacity, enabling them to withstand higher temperatures, reaching 120°C for short durations and 110°C continuously. This type of high-density polyethylene excels in blow molding applications.
Key Properties of HDPE Polyethylene 300 Sheets include rigidity, resilience, durability, resistance to chemicals and moisture, low gas permeability, easy processing, and formability.
Benefits:
| High abrasion resistance. | Easily machinability. | Shock resistance is good even at low temperatures. |
| Low friction coefficient. | High chemical resistance, typical of the polyolefins. | Good electrical properties. |
| Low specific gravity. | Physiologically inert, approved for food contact | Weatherproof |
Weaknesses:
- Compared to the engineering plastics it has lower thermal and mechanical properties, such as tensile stress, flexural and compressive strength.
- Compared to high molecular weight PE, it is more rigid and its resistance to continuous shock is therefore lower.
Applications:
The low friction coefficient and its non-hygroscopicity make it suitable for use as a bearing or mechanical parts with low loads, even when operating in water. However, it’s widely used for components in food machinery and manufacturing.
Mechanical Properties
| PROPERTY | UNIT | VALUE / RANGE |
| Tensile Strength, Yield at 23 C | MPa | 23.0 – 29.5 |
| Tensile Strength, Break at 23 C | MPa | 30.5 – 33 |
| Elongation, Yield | % | 9 – 18 |
| Elongation, Break | % | 600 – 1350 |
| Tensile Modulus at 23 C | MPa | 900 – 1550 |
| Flexural Strength, Yield | MPa | |
| Flexural Modulus | MPa | 970- 1380 |
| Compressive Strength | MPa | |
| Izod Notched | J/m (kJ/m2) | 71 – 159 (20) |
| Izod Unnotched | J/m | No Break |
Thermal Properties
| PROPERTY | UNIT | VALUE / RANGE |
| Melting Point | °C | 126 – 135 |
| Density | g mL-1 | 0.955 – 0.961 |
| Coefficient of Thermal Expansion x 10-5 | cm / (cm °C) | 12.5 – 18.0 |
| Heat Deflection Temperature, 0.5 MPa | °C | 64 – 77 |
| Heat Deflection Temperature, 1.8 MPa (unannealed) | °C | 76.5 – 78 |
| Thermal Conductivity | W / mK | 0.35 – 0.49 |
| Shore Hardness, D Scale | n/a | 55 – 67 |
Electrical Properties
| PROPERTY | UNIT | VALUE / RANGE | |
|
Ohm-cm | 6 x 1015 | |
| Dielectric Strength | V/mm x 104 | 2.1 – 3.5 | |
| Dielectric Constant @ 1 MHz | n/a | 2.2 – 2.4 | |
| Dissipation Factor @ 1 MHz | n/a | 0.0001 – 0.0005 |
Other Properties
| PROPERTY | UNIT | VALUE / RANGE | |
|
°C | ||
| Linear Mold Shrinkage | cm/cm | 0.017 | |
| Continuous Service Temperature | °C | -73 – 82 | |
| Water Absorption, 24 hr. Immersion | % | 0.01 – 0.03 |
