Properties of High Density Polyethylene (HDPE) Plastic

High-density polyethylene. HPDE is made from hydrocarbons found in petroleum. HDPE is flexible yet more rigid, has a stronger intermolecular force and tensile strength than low-density polyethylene (LDPE). It is also harder and more opaque and can withstand somewhat higher temperatures: 248°F for short periods, 230°F continuously. HDPE has a good impact strength, a good resistance to stress crack, chemicals and vapors. However, HDPE is a poor gas barrier. Its natural color is milky white and semi translucent depending on its density. Its SPI resin identification code number is 2.

Common uses: milk jugs, distilled water, large vinegar bottles, grocery bags, liquid laundry and dish detergent, fabric softener, motor oil, antifreeze, bleach and lotion

High density polyethylene is excellent for blow molding, such as  for bottles, Buckets, Barrels, bottles, bags and containers.

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       HDPE Resistance

        Resistance to diluted and concentrated Acids, Alcohols and Bases is  Excellent
        Resistance  to Aldehydes, Esters, Aliphatic and Aromatic Hydrocarbons, Ketones and Mineral and Vegetable Oils us Very Good
        Resistance suitable for short term use only to Halogenated Hydrocarbons and Oxidizing Agents should be Limited.


HDPE Quick Facts

Maximum Temperature: 248°F
Minimum Temperature: -148°F
Autoclavable: No
Melting Point: 266°F
Tensile Strength: 4550 psi 
Hardness: SD65
UV Resistance: Poor for natural color
 Specific Gravity: 0.95



        HDPE products are available in many forms such as sheet, rod and tubing for fabrication:

Excellent for all  food related products, FDA, NSF, and USDA approved for direct contact.
Very Good chemical resistance and high rigidity make it a excellent choice for containers and tanks.
Some other uses include pipe fittings, buckets, barrels and drums.
Excellent  impact resistance, light weight, very low moisture absorption, & high tensile strength.


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