Polyethylene Grades Explained - Molecular Weight


The higher the molecular weight of polyethylene, the easier the polyolefine is to machine. HMWPE PE500 grade is very extensively used as a wear or abrasion resistant component on conveyors and chutes. UHMWPE PE1000 grade is the toughest of the Polyolefine. The ultra-high molecular weight polyethylene has extraordinary wear and abrasion properties which is ten times better than carbon steel.

Being slightly ‘softer’ HMWPE is often specified for food chopping boards because it does not blunt knives as quickly.

Some of the Benefits are:

  • Very good low temperature impact strength
  • Freedom from environmental stress cracking
  • Low coefficient of friction
  • Tensile strength

Often the answer to neglected bearing surfaces subject to wear and abrasion, UHMWPE stock shapes are produced by press sintered moulding.

Many types carry FDA and BGA approval for use in contact with drugs and foodstuffs. It is also used for:

  • Wear strips
  • Conveyor belts
  • Aggregate handling
  • Food processing
  • Bottling plants

Partwell Group are a plastic sheet stockist, holding a vast range of plastic grades, everything from Polyethylene, to Acetal. All materials can be supplied as sheet, rod, or bespoke machined parts.

If you require any further assistance, please feel free to contact our CNC engineers directly on 01254 295707.

22nd October 2013, 10:18