Plastic Properties of High Density Polyethylene (HDPE)
A linear polymer, High Density Polyethylene (HDPE) is prepared from ethylene by a catalytic process. The absence of branching results in a more closely packed structure with a higher density and somewhat higher chemical resistance than LDPE. HDPE is also somewhat harder and more opaque and it can withstand rather
higher temperatures (120° Celsius for short periods, 110° Celsius continuously).
High density polyethylene lends itself particularly well to blow molding, e.g. for bottles, cutting boards, dipping baskets, dippers, trays and containers.
Dynalab Corp's plastic fabrication shop fabricates many catalog and custom HDPE products. If you can't find the product you require on our website please e-mail for a custom quote.
Don't see the answers to your High Density Polyethylene questions? It must be time to see what
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HDPE Resistance:
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HDPE Quick Facts:
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Excellent resistance (no attack) to dilute and concentrated Acids, Alcohols and Bases
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• Max Temp: 248°F 120°C
• Min Temp: -148°F -100°C
• Autoclavable: No
• Melting Point: 266°F 130°C
• Tensile Strength: 4,550 psi
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• Hardness: SD65
• UV Resistance: Poor
• Translucent
• Rigid
• Specific Gravity: 0.95 |
Good resistance (minor attack) to Aldehydes, Esters, Aliphatic and Aromatic Hydrocarbons, Ketones and Mineral and Vegetable Oils
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Limited resistance (moderate attack and suitable for short term use only) to Halogenated Hydrocarbons and Oxidizing Agents.
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| HDPE Fabrication: |
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Additional Information:
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• Excellent for many food related products, FDA, NSF, and USDA approved for direct contact (depending on grade of material). This material machines extremely well.
• Good chemical resistance and high rigidity make it a good choice for trays and tanks.
• Other uses include pipe fittings, wear plates, hinges and cutting boards.
• Good impact resistance, light weight, very low moisture absorption, and high tensile strength. Not a good candidate for gluing. Mechanical fastening is one option, but preferably joined by hot air or nitrogen welding. Also, Ultrasonic, Laser, and infrared welding.
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• Chemical Properties A-F
• Chemical Properties G-Z
• Physical Properties
• Use and Care of Plastics
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