83 Shore "A" Polyurethane in Orange and Black
PHYSICAL PROPERTIES ASTM TEST VALUE
Hardness D2240 83 Shore A
Tensile strength D412 5000 psi
100% Modulus D412 780 psi
300% Modulus D412 1700 psi
Elongation D412 500%
Compression set D395 16%
Abrasion loss D1044 3 mg
Split tear D470 460 lb/in
Dynamic coefficient of friction (against 125 rms steel) D1894 0.54
Bashore resilience D2632 36%
Brittle temperature   -90°F
Glass transition temperature   -44.1°F
Vicat softening   196°F
Reduction in sound as compared to metal roller   7-10 decibels
Load rating   Equal to the load rating of the roller being covered
Specific gravity   1.20 g/cc
ELECTRICAL PROPERTIES
ASTM TEST CONDITION VALUE
Dielectric Strength D179 Short Term 330 volts/mil
Volume Resistivity D257 - 2.1x1012 ohm-cm
Surface Resistivity D257 - 3.3x1013 ohms
Dielectric Constant D150 60 cps 6.34
    103 cps 6.08
    106 cps 5.15
Loss Factor D150 60 cps 0.154
    103 cps 0.116
    106 cps 0.326
Dissipation Factor D150 60 cps 0.0242
    103 cps 0.0191
    106 cps 0.0632
Capacitance D150 60 cps 69.5 μFarads
    103 cps 66.7 μFarads
    106 cps 56.8 μFarads

90 Shore "A" Polyurethane in Green
PHYSICAL PROPERTIES ASTM TEST VALUE
Hardness D2240 83 Shore A
Tensile strength D412 5000 psi
100% Modulus D412 780 psi
300% Modulus D412 1700 psi
Elongation D412 500%
Compression set D395 16%
Abrasion loss D1044 3 mg
Split tear D470 460 lb/in
Dynamic coefficient of friction (against 125 rms steel) D1894 0.54
Bashore resilience D2632 36%
Brittle temperature   -90°F
Glass transition temperature   -44.1°F
Vicat softening   196°F
Reduction in sound as compared to metal roller   7-10 decibels
Load rating   Equal to the load rating of the roller being covered
Specific gravity   1.20 g/cc
ELECTRICAL PROPERTIES
ASTM TEST CONDITION VALUE
Dielectric Strength D179 Short Term 330 volts/mil
Volume Resistivity D257 - 2.1x1012 ohm-cm
Surface Resistivity D257 - 3.3x1013 ohms
Dielectric Constant D150 60 cps 6.34
    103 cps 6.08
    106 cps 5.15
Loss Factor D150 60 cps 0.154
    103 cps 0.116
    106 cps 0.326
Dissipation Factor D150 60 cps 0.0242
    103 cps 0.0191
    106 cps 0.0632
Capacitance D150 60 cps 69.5 μFarads
    103 cps 66.7 μFarads
    106 cps 56.8 μFarads

70 Shore "A" FDA Polyurethane in Black
PHYSICAL PROPERTIES ASTM TEST DATA
Hardness D2240 70 Shore A
Tensile strength D412 3100 lb/in2
Tensile stress at 100% elongations D412 440 lb/in2
Tensile stress at 300% elongation D412 690 lb/in2
Elongation at break D412 765%
Compression set, method Ba
22 hours at 158°F (70°C)
22 hours at 73°F (23°C)
D395 39%
16%
Taber abrasion
H-18 wheel, 1000-g load, 1000 cycles
D3489 12 mg loss
Tear strength, die "C" D624 350 lb/in
Flexural Modulus
73°F (23°C)
-22°F (-30°C)
D790 1910 lb/in2
18,470 lb/in2
Bashore resilience D2632 67%
Glass transition temperature (Tg) DMAb -94°F
Vicat softening temperature (rate A) D1525 1
Reduction in sound as compared to metal roller 7-10 decibels
Load rating Equal to the load rating of the roller being covered
Specific gravity D792 1.06g/cm3
aPost-cured for 16 hours at 230°F (110°C)
bDMA – Dynamic Mechanical Analysis (not an ASTM test)
Applications
70A Koat-A-Roll® complies with FDA food-contact regulations 21 CFR 177.1680 and 177.2600

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