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UHMWPE (Polystone P7000, 8000 & Matrox - Dotmar's trade names for UHMWPE)

Supplier: Dotmar Engineering Plastics

UHMWPE sheet is manufactured by pouring powder into a large mould (6000 x 2500mm mega press).

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A large press with a heated bed and top plate is then used to force the powder into sheet form. Ultra High Molecular Weight Polyethylene (UHMWPE) is the great all rounder in thermoplastics. It has extremely long molecular chains, with a molecular weight numbering in the millions, usually between 2 and 6 million.

Rochling Polystone UHMWPE sheet and rodexhibits a molecular weight of 9.2 million which is significantly more than other commercial grades of UHMWPE available. This results in an extremely tough material that exhibits an impressive array of characteristics. A higher molecular weight of Polyethylene has a significant influence on important technical properties such as wear resistance.

To further convey the wear characteristicsof the Polystoneand Matrox range of UHMWPE sheet materials they are tested utilising the sand slurry test method. The general concept of the sand slurry abrasion test is to measure the mass of material loss utilising a mixture of course sand and water.
Rochling's range of 9.2 million molecular weight UHMWPE materials have a sand slurry value of 80 whilst other materials with a molecular weight of 5 million or less have a sand slurry value of 100. This means that the lower molecular weight material has up to 20% greater loss than that of the higher Rochling grades.

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