National City CA 91950
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Ultra High Molecular Weight Polyethylene (UHMW-PE)
a distinctive and useful material? It's the combination of
excellent properties –outstanding
abrasion resistance, superior impact resistance, non-sticking
and self-lubricating properties and excellent mechanical
properties, even in cryogenic conditions.
UHMW-PE is anextremely
high viscosity polymerthat
is produced in the form of a powder and has an average particle
size diameter typically ranging from 100-200 microns. As a
result of its viscosity, it generally cannot be processed by the
common methods used for ordinary thermoplastics. Thus,
compression molding and ram extrusion processes are used to
generate the high pressures needed to fuse UHMW-PE particles
together and then, typically, are used to form the material into
stock shapes or profiles with subsequent machining, as
Because of its abrasion resistance, chemical resistance and
good frictional properties, majorapplication
areas of UHMW-PE include bulk material handling, food and
beverage machinery; chemical, mining and mineral processing
equipment, recreational equipment, transportation and orthopedic
Conveyor guide rails, belt scrapers, chain guides, suspension
wear plates. These are just a few of the ways UHMW
extrusions have been used over the years, with proven long-term
results. Extruded UHMW profiles can save up to 50% of the cost of a
Thanks to its extremely low coefficient of friction (0.14), the
polymer easily outperforms steel in sliding applications. Its
inherent lubricity minimizes the heat-generating friction, which
gradually destroys steel parts, and ensures smooth, noiseless
Withstands sand, grit, and corrosion at sub-zero temperatures.
UHMW extrusions have long been used as snow slides protecting
the frame in snowmobile drive suspension systems--a tough
endurance test for any material.
Not only does the plastic withstand the constant abrasive
friction of the vehicle's traction drive belt high-speed drive
chain, it must perform in an extremely harsh environment. UHMW
stands up to sand, grit, water and ice that would quickly
destroy a lesser material. And it does it at sub-zero
This kind of durability, low friction and wear resistance are
key reasons why UHMW is the material of choice in so many
other applications. Here is a brief sampling: Lodging & pulp -
Conveyor wear plates; Automotive - Rider plates for assembly
lines; Iron ore - Idler rollers for conveyors; Bottling &
canning - Guide shoes for pallitizers; Waste water treatment -
wear strips and shoes.ined Parts
Sprockets, wheels, bearings, and many other component parts can
be fabricated from UHMW for applications as diverse as
railroad cars, spacecraft, and hydroelectric plants.
The plastic can be machined into virtually anything, from small
gears and bearings to huge sprockets--shapes that until recently
were only possible with metals.
Ease of machining cuts costs.
UHMW not only outperforms metal in abrasion applications, it's
also easier to machine and therefore cheaper.
Using special CNC lathes and milling machines, the versatile
polymer can be milled, planed, sawed, drilled, and turned to
create a huge variety of parts at a very competitive price.
Applications for machined parts include: Food packaging - Chain belt guides - Sprockets for conveyors;
Railroad cars - Flanged rollers; Chemical processing - Pistons,
valves, bearings; Textiles - Industrial loom pickers; Waste
water treatment - chain drive sprockets; NASA spacecraft -
pinion gear for fuel cell.
Machining mechanical plastics gear from UHMW on a C.R. Onsrud
Inc. - 241G18D Panel Pro Series CNC router
Turning UHMW Polyethylene on a CNC lathe
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