Elastomer Characteristics
Latex and Natural Rubber
Provides excellent electrical, impact, abrasion, and tear resistance. Typical properties are 38 Durometer shore "A", 800% elongation, 4000 psi tensile strength.Neoprene
This rubber provides excellent abrasion and oxidation resistance, and good oil, electrical, flame, impact, tear, and weather resistance. Typical properties are 50 Durometer shore "A", 4-500% elongation, 2600 psi tensile strength.Silicone
Provides excellent weather, oxidation, and ozone resistance; also provides good electrical resistance.Polyurethane
This lightweight, smooth-finish material has the unique ability to be softer than a rubber band, or harder than a table top. It resists abrasion, breakage on impact, tearing, water, oxidation, ozone, and many solvents. Compared to other elastomers, polyurethane has better cut, tear, and abrasion resistance. Compared to plastics, it is non-brittle, and has the unique ability to return to its original shape. It is extremely stable when exposed to temperature changes, but it is not recommended for prolonged contact with steam. Typical properties of polyurethane:Durometer Shore A |
Trexler Color |
Tensile, psi ASTM 412-66 |
Elongation ASTM 412-66 |
Tear split-pl Die-B D-470 |
Tear Die-C 412-66 |
Tear Die-B |
Shrinkage linear |
25 | red | 2700 | 500 | 40 | 1.5% | ||
50 | yellow | 4000 | 500 | 40 | 200 | 1.5% | |
65 | blue | 1250 | 320 | 40 | 130 | 40 | 0.0040 |
80 | red | 2600 | 300 | 40 | 40 | 0.0050 |