Knowde Enhanced TDS
Identification & Functionality
- Chemical Family
- Polymer Name
- Technologies
- Product Families
Features & Benefits
- Labeling Claims
- Materials Features
- Features & Benefits
Product Attributes Customer Benefits - Range of grades available.
- Able to resist very high impact loads
- Excellent chemical resistance
- Natural product may be used in contact with foodstuffs (subject to appropriate limits)
- HDPE may be hot air welded.
- UHMWPE is resistant to extreme abrasion
- Low density - compared with other engineering plastics
- Minimal absorption of moisture
- Diameter (HD-PE)
- Product sourced from longstanding manufacturer with ISO accreditation
- Correct grade selection for each application is optimized
- Very good all-round product for diverse engineering applications
- Low cost assembly.
- Long wear life.
- Easy handling, low inertia, saving energy
- Aids dimensional stability
- Huge components are possible.
- Consistent quality ensures uniform machining & performance
Applications & Uses
- Markets
- Applications
- Plastics & Elastomers End Uses
- Typical Applications
High density PE (HDPE) - For transport containers, pump and valve parts, tank construction, components with medical applications, gaskets, slide profiles, components for the food industry.
- Machinability
The machining of polyethylene is uncomplicated provided the component tolerances allow for polyethylene’s relatively high co-efficient of thermal expansion and tensile elongation values.
Properties
- Flame Rating
- Mechanical Properties
- Thermal Properties
- Typical Properties
- Electrical Properties
- Flammability
| Value | Units | Test Method / Conditions | |
| Density (20°C) | 0.95 | g/cm^³ | - |
| Tensile Strength at Yield | 27.0 | MPa | - |
| Tensile Strength at Break | 35.0 | MPa | - |
| Elongation at Yield | 9.0 | % | - |
| Elongation at Break | min. 700 | % | - |
| Tensile Modulus of Elasticity | 1150.0 | MPa | - |
| Flexural Strength | 22.0 | MPa | - |
| Impact Strength | No break | kJ/m^² | - |
| Notched Impact Strength | 29.0 | kJ/m^² | - |
| Hardness | 64.0 | Shore D | - |
| Value | Units | Test Method / Conditions | |
| Vicat Softening Point | 80.0 | ºC | VST/B/50 |
| Vicat Softening Point | 129.0 | ºC | VST/A/50 |
| Heat Deflection Temperature | 69.0 | ºC | Method B |
| Coefficient of Thermal Expansion | 1.5 | 10^⁻⁶ .K^⁻¹ | - |
| Thermal Conductivity (20°C) | 0.42 | W/(m.K) | - |
| Service Temperatures without High Mech. Load - Upper Limit | 90.0 | ºC | - |
| Service Temperatures without High Mech. Load - Lower Limit | -50.0 | ºC | - |
| Value | Units | Test Method / Conditions | |
| Moisture Absorption | 0.01 | - | ISO 62 |
| Friction Co-efficient | 0.3 | - | - |
| Value | Units | Test Method / Conditions | |
| Volume Resistivity | min. 10^¹⁵ | ohm-cm | - |
| Surface Resistivity | min. 10^¹⁶ | ohm | - |
| Dielectric Constant (1 MHz) | 2.35 | - | - |
| Dielectric Loss Factor (1 MHz) | 0.0003 | - | - |
| Dielectric Strength | 17.0 | kV/mm | - |
| Value | Units | Test Method / Conditions | |
| Flammability | HB | - | UL94 |
Regulatory & Compliance
- Certifications & Compliance
- Physiological Safety
The FDA (US Food & Drug Administration) has approved the raw materials used for both the HD-PE and UHMWPE grades to allow their use in contact with food – check for any specific limitations required by the FDA.
Technical Details & Test Data
- Technical Description
Grade Modification Purpose High density PE (HD-PE or 300 grade) None. Colors, natural black. Some sizes available in red or yellow. Component identification. Black will have better UV resistance. - Chemical Resistance
HD-PE has extremely good resistance to aqueous solutions of acids, alkalis and salts. Also alcohol and many solvents. Slight swelling may be caused by permanent contact with grease, oil and wax, but generally not enough to limit the use of the material. Aromatics and halogenated hydrocarbons will cause a reduction in useful working life. The material has no resistance to strong oxidizing agents such as nitric or chromic acids, and halogens. The UHMWPE grade has even better chemical resistance; strong oxidizing agents only cause surface swelling.
Packaging & Availability
- Product Availability
Extruded round bar HD-PE 10mm to 700mm dia in black (to 500mm dia in natural) ≤ 2m lengths. Hollow round bar in HD-PE (black color) From 30mm o/d x 15mm i/d to HD-PE (black color) 200mm o/d x 120mm i/d in 2m lengths. Square & rectangular hollow tubes, angles, channels and welding rod. Also hinges and handles for tank fabrication. All in black color. * Sizes not stocked are available on relatively short delivery time. 1, 2 or 3m lengths supplied or cut to customer requirements.