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URETHANE
Polyurethane: Tough enough for the job.
Polyurethane
or "urethane" is an elastomeric material with outstanding properties and
wear characteristics.
Benefits
- Superior cut and abrasion resistance
- Ability to "self-heal"
- Can be formulated to possess specific properties (i.e. coefficient of friction, resiliency and compression set can be formulated high or low.
- Excellent resistance to ozone and aging
- Can be molded and bonded to a variety of substrates
- Resistant to many oils and solvents
- Lightweight
- Outstanding low temperature properties
Product Applications
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Typical Properties
- Excellent shock absorbing properties
- Good dielectric strength
- Excellent electrical insulation properties
- Low compression setting
- High load-bearing capabilities
- Superior abrasion resistance
- High ozone and oxidation resistance
- Superior tear and cut resistance
- Most formulations offer extremely high flex-life
- Superior sound dampening properties (relative to rubber and plastic)
- Oil & solvent resistance
Hardness Scale
Typical Properties for Precision Cast Urethane
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MECHANICAL
PROPERTY
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ASTM
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75A
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85A
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95A
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75D
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| Tensile Properties |
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| Break,
psi 100% 100% modulus, psi 300% modulus, psi Elongation, % Break Set, % Modulus of Elasticity, psi |
D412 |
5500
350 1000 500 10 15 |
6000
600 1500 500 10 25 |
5500
1800 4000 320 10 90 |
7500 |
| Compression Properties (Shape factor 0.56) | |||||
| Deflection,
psi @ 5% Deflection, psi @ 10% Deflection, psi @ 15% Deflection, psi @ 20% Deflection, psi @ 25% |
D-575
D-575 D-575 D-575 D-575 |
70
140 220 280 330 |
180
390 560 690 800 |
450
890 1170 1400 1600 |
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-- -- -- -- |
| Compression Set, % | |||||
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Method
A @ 70o C
Method B @ 70o C |
D-395
D-395 |
8
15 |
5
25 |
1
40 |
15
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| Durometer, Shore +/- 5 |
D-2240
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75A
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85A
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95A
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75D
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| Tear Properties, pli, Die C |
D-624
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250
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400
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450
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850
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| Abrasion Resistance, Tabor | |||||
| H18 @1000 gm. load, mg. loss per 100 cycles |
C-501 |
40 |
40 |
40 |
450 |
| Specific Gravity |
D-792
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1.26
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1.26
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1.15
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1.18
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| Base |
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Ester
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Ester
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Ether
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Ether
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Availability: Solid Cast Urethane Rod
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Diameter
(inches)
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1/2
5/8 3/4 7/8 1 1-1/4 1-1/2 |
1-3/4
2 2-1/4 2-1/2 2-3/4 3 3-1/4 |
3-1/2
3-3/4 4 4-1/2 5 5-1/2 6 |
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Standard
Length (inches) - 36
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Precision Cast Urethane Tube
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I.D.
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O.D.
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Length
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1
1-1/4 1-1/2 1-1/3 2 2-1/4 2-1/2 2-3/4 3 |
2
2-1/4 2-1/2 2-3/4 3 3-1/4 3-1/2 3-3/4 4 |
36
36 36 36 36 36 36 36 36 |
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Standard
Length (inches) - 36
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Note: Alro Plastics has many sizes and durometers in stock and immediately available for cutting and/or shipping the same day.
Custom Molded Products
In addition, we can provide urethane in virtually any shape or size for engineering parts in grain, mining, sand and gravel, crushed stone, aggregate mixing, general bulk handling and other industrial applications.
Roller Solutions
Just about any size or kind of roller cover can be formulated. Beginning with the smallest wheels and extending to rolls with diameters of up to 40 inches and lengths up to 26 feet. All types of recovering:
- Clipper
- Rollers Coater Rollers
- Drive Rollers
- Paint Rollers
- Idler Rollers
- Sander Rollers
- Guide Wheels
- Pulley Wheels
Precision-Cast Sheets
Cast sheets are ideal for fabrication into a wide variety of products. Standard sheets are available in 12" square up to 48" square sheets in the following thicknesses: 1/32", 1/16", 3/32", 1/8", 5/32", 3/16", 1/4", 5/16", 3/8", 1/2", 5/8", 3/4", 1", 1-1/4", 1-3/2", 1-3/4", 8 2". Other sizes and thicknesses are available on special order.
Tolerances are: 1/32 to 3/16, +/-.010"; 1/4 to 3/8", +/-.015"; 1/2 to 1-1/4", + .025"; 1-1/2" and over, +3%.
Fabric-Backed Sheets
Standard sheets are available integrally cast onto duck cloth (.048" thick), permitting easy cementing to metal or other surfaces. This composite converts effectively to large roll coverings or chute and bin liners. Bond strength between the fabric and the urethane is excellent, and there is no strike-through to the exposed side of the fabric. Sheet is stocked in 3/16", 1/4", 5/16", 3/8", 7/16", and 9/16" overall thicknesses up to 48" square. Custom sizes and thicknesses are available on special order.
Bars
Bar stock is popular for metal forming uses. The precise size eliminates the need for a matched female die. The material becomes the contact surface in forming, bending or shaping metal without scratching or marring the finished product. Bar stock is also used as press-brake pads, bumper pads, and wear strips, and is machined into a great variety of prototype parts. Standard sizes are available 48" long and in thicknesses of 1" square, 2" square and 2" x 3". Custom sizes are available.