Page 19 - Smooth-OnCatalog
P. 19
PMC Series Polyurethane Rubber
®
Industrial Rubbers PMC®-770
rubber
PMC®-770, 780 & 790 mechanical gear.
The PMC® line of hard urethane rubbers is used for an endless variety of
industrial casting applications. Available in Shore 70A, 80A and 90A durometers,
they are dimensionally stable and feature exceptional physical properties, including high impact resistance
and tensile strength.
These rubbers are mixed 2A:1B by volume and offer extra long working times for pouring large or complicated
forms. Superior abrasion resistance makes these urethanes the perfect choice for making molds for
casting concrete and making ball mill liners.
They are also used to make industrial rollers and belts, rubber
mechanical parts (such as gaskets, wheels, and pullies) and vibration/ PMC®-780 is
shock pads. They are also used as powerful flexible adhesives for used to create
industrial bonding applications. wear resistant
bushings.
PMC®-790 was used to create rubber molds
for these balusters. The molds have been
used for hundreds of concrete castings.
Concrete balusters made from production
Econ® 60 & 80 quality PMC®-790 urethane rubber molds.
Econ® 60 & 80 are lower cost rubbers compared to our popular
PMC® Series. They are mixed 1A:1B by volume, possess a relatively
low viscosity, no odor, and cure quickly. They do have lower
physical properties compared to the PMC® Series rubbers
as well, but are suitable for many industrial applications,
including making highly impact resistant prototype
parts, fast concrete stamping pads and fast pour-in- Econ® 60 & 80 are both good
place gaskets for equipment. Econ® 80 can also choices for making economical
be used as a liner for concrete burial vaults. concrete stamping pads.
A:B Mix Ratio Mixed Viscosity Pot Life Demold Time Hardness (Shore A) Shrinkage (in./in.) Volumetric Yield (cu. in./lb.) Tear Strength Elongation at Break % Color
Product Name
PMC®-770 2A:1B pbv 3,000 cps 30 min. 16 hrs. 70A <0.001 26.5 200 pli 750% Light Amber
PMC®-780 Dry 2A:1B pbv 2,000 cps 25 min. 48 hrs. 80A <0.001 27.2 200 pli 700% Light Amber
PMC®-790 2A:1B pbv 3,000 cps 20 min. 48 hrs. 90A <0.001 25.9 300 pli 550% Clear Amber
Econ® 60 1A:1B pbv 1,400 cps 6 min. 16 hrs. 60A <0.001 26.7 85 pli 500% Light Amber
Econ® 80 1A:1B pbv 1,200 cps 13 min. 6 hrs. 80A 0.0014 26.16 77 pli 127% Translucent
Learn more at: www.smooth-on.com 18
®
Industrial Rubbers PMC®-770
rubber
PMC®-770, 780 & 790 mechanical gear.
The PMC® line of hard urethane rubbers is used for an endless variety of
industrial casting applications. Available in Shore 70A, 80A and 90A durometers,
they are dimensionally stable and feature exceptional physical properties, including high impact resistance
and tensile strength.
These rubbers are mixed 2A:1B by volume and offer extra long working times for pouring large or complicated
forms. Superior abrasion resistance makes these urethanes the perfect choice for making molds for
casting concrete and making ball mill liners.
They are also used to make industrial rollers and belts, rubber
mechanical parts (such as gaskets, wheels, and pullies) and vibration/ PMC®-780 is
shock pads. They are also used as powerful flexible adhesives for used to create
industrial bonding applications. wear resistant
bushings.
PMC®-790 was used to create rubber molds
for these balusters. The molds have been
used for hundreds of concrete castings.
Concrete balusters made from production
Econ® 60 & 80 quality PMC®-790 urethane rubber molds.
Econ® 60 & 80 are lower cost rubbers compared to our popular
PMC® Series. They are mixed 1A:1B by volume, possess a relatively
low viscosity, no odor, and cure quickly. They do have lower
physical properties compared to the PMC® Series rubbers
as well, but are suitable for many industrial applications,
including making highly impact resistant prototype
parts, fast concrete stamping pads and fast pour-in- Econ® 60 & 80 are both good
place gaskets for equipment. Econ® 80 can also choices for making economical
be used as a liner for concrete burial vaults. concrete stamping pads.
A:B Mix Ratio Mixed Viscosity Pot Life Demold Time Hardness (Shore A) Shrinkage (in./in.) Volumetric Yield (cu. in./lb.) Tear Strength Elongation at Break % Color
Product Name
PMC®-770 2A:1B pbv 3,000 cps 30 min. 16 hrs. 70A <0.001 26.5 200 pli 750% Light Amber
PMC®-780 Dry 2A:1B pbv 2,000 cps 25 min. 48 hrs. 80A <0.001 27.2 200 pli 700% Light Amber
PMC®-790 2A:1B pbv 3,000 cps 20 min. 48 hrs. 90A <0.001 25.9 300 pli 550% Clear Amber
Econ® 60 1A:1B pbv 1,400 cps 6 min. 16 hrs. 60A <0.001 26.7 85 pli 500% Light Amber
Econ® 80 1A:1B pbv 1,200 cps 13 min. 6 hrs. 80A 0.0014 26.16 77 pli 127% Translucent
Learn more at: www.smooth-on.com 18
