Isostatic Press Assemblies and Rubber Products

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