Polyethylene - Product specifications, properties & common uses.
Acronym: PE, HD-PE, LD-PE, HMW-PE, more...

Basic Properties (HD): Flexible, lightweight, translucent; waxy to the touch. Softens at low heat, breaks down in sunlight unless pigmented, and is permeable to some liquids & gases. Has many variations.

 

                                             

Polyethylene - Properties & common uses.

 

Polyethylene is available in a large variety of different size sheets for general use in water and chemical storage as well as plant engineering. Being physically inert it is suitable for food preparation and contact areas. A very popular plastic with many applications, most types of PE is weldable and 'fabricator friendly', easily machined and is light weight. Most rota molded products use a type of PE powder. Being a good insulator of electricity it is commonly used for electrical covers.

Unlike many other plastics, Polyethylene does not absorb water therefore is suitable for outdoor use when pigmented. When used in fuel cells or tanks it will readily absorb hydrocarbons, making it difficult for repairs to be made.

Its chemical resistance is generally good, resisting attack from acids & alkali's such as Sulphuric Acid and Caustics. Its maximum operating temperature range is low (HD-PE @ 80 Degrees Celsius) when compared to other plastics.

There are many variations of PE including HMWPE ( High Molecular Weight Polyethylene) that have higher constant operating temperatures. Also known as Polystone 500, HMWPE has much better mechanical properties than HD-PE (High Density) with much more rigidity and better creep resistance, making it suitable for machine parts, gears, rollers and the like.

UHMWPE  or Ultra High Molecular Weight PE is specifically formulated for enhanced resistance to wear, being better than Carbon Steel for sliding abrasion applications. Almost impervious to environmental stress cracking, UHMWPE is ideally suited to applications in mechanical transmission, chain guides, wear strips and flow promotion.

 

 

High Density Polyethylene Physical Properties

Specific Gravity Units g/cm3

0.95

Minimum / Maximum Service temperature in Air Unit °C

-50 to +80

Tensile Strength Yield MPA

>20

Tensile Strength Break MPA

>40

Impact Resistance DIN 53505 Notched Impact Strength Units MJ/mm2

No Break

Co-efficient of Thermal Expansion Units mm/(mmxK) x 10-6

180

Dielectric Strength DIN 53481 Units KV/mm (measured on a 0.2mm thick sheet)

75

Surface Resistivity Units Ohms

>1x1015

Relative Abrasion loss by Sand Slurry Polystone 7000 = 90

335

FDA Approved

Yes

 

 

Polyethylene - Availability from CV-IPF.

 

PE Sheet

Thickness: 1.5 - 160mm

Sizes: From 600 x 600mm

up to 1500 x 3000mm

PE Rod

Diameter: 20 - 250mm

PE Machined parts

 

 

Many variations of Polyethylene are available through CV Industrial Plastic Fabricators, Give us a call today to quote on your specific application on (03) 54 428 728.


 
 





February 26th 2009

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