|
Natural |
SBR |
EPDM |
Neoprene |
Nitrile |
Urethane |
Silicone |
Fluorocarbon |
|
Specific Gravity |
0.93 |
0.94 |
0.86 |
1.23 |
1.00 |
1.05 to 1.25 |
0.95 to 1.20 |
1.4 to |
|
Durometer, Range |
30-100 |
40-100 |
30-90 |
40-95 |
30-90 |
55-100 |
25-90 |
55-90 |
|
Tensile Strength |
E |
F-G |
VG |
VG |
VG |
E |
F-G |
VG |
|
Elongation |
VG-E |
G |
G |
G |
G |
G-VG |
VG-E |
F-G |
|
Compression Set |
G |
G |
G |
F-G |
G |
G-E |
G-E |
G-E |
|
Heat Resistance |
F |
F-G |
VG-E |
F-G |
G |
F-G |
E |
E |
|
Resilience or Rebound |
E |
F-G |
G |
VG |
F-G |
F-E |
G |
F |
|
Impact Resistance |
E |
E |
G |
G |
F |
G-E |
P-G |
E |
|
Abrasion Resistance |
E |
G-E |
G-E |
G-E |
G-E |
E |
P-F |
F-G |
|
Tear Resistance |
E |
F |
F-G |
F-G |
F-G |
E |
P-F |
F |
|
Cut Growth |
E |
G |
G |
G |
G |
G-E |
P-F |
P-F |
|
Flame Resistance |
P |
P |
P |
G |
P |
P-F |
F-G |
VG-E |
|
Impermeability, Gas |
F |
F |
F-G |
F-G |
G |
P-F |
F-G |
E |
|
Weathering Resistance |
P-F |
F |
E |
VG |
F-G |
G-E |
E |
E |
|
Low Temperature Limit* |
-10° TO -50°F |
0° TO -50°F |
-20° TO -60°F |
-10° TO -50°F |
-30° TO -40°F |
-10° TO -50°F |
-65° TO -150°F |
+10° TO -40°F |
|
High Temperature Limit* |
158° TO 225°F |
158° TO 225°F |
300° TO 350°F |
225°F |
275°F |
250°F |
400° TO 550°F |
400° TO 450°F |
| P = Poor | F = Fair | G = Good | VG = Very Good | E = Excellent |
All of Lauren Manufacturing’s sponge products are identified by a three-character Grade Number (example: 2A2). The three characters represent type, class and grade, and are defined as follows:
Type
Type 1 = Open cell
Type 2 = Closed cell
Class
Class A = Non-oil resistant (example: EPDM)
Class B = Oil resistant, low swell (example: Nitrile)
Class C = Oil resistant, medium swell (example: Neoprene)
Class D = Extreme temperature resistance (example: Silicone)
Grade
Grade ratings represent compression deflection, or the amount of force in pounds per square inch to deflect the sample 25% of its height.
They are as follows:
Grade 0 = less than 2 psi
Grade 1 = 2-5 psi
Grade 2 = 5-9 psi
Grade 3 = 9-13 psi (for classes A, B, C) 9-15 psi (for class D)
Grade 4 = 13-17 psi (for classes A, B, C) 22-30 psi (for class D)
Grade 5 = 17-25 psi (for classes A, B, C) 22-30 psi (for class D)
Example Line Call Out for Sponge
ASTM D-1056 2C2 A1 B2 E1 Z (Z = material passes FMVSS 302)
Suffix
Suffix numbers that follow the suffix letter denote different testing parameters or conditions for that suffix. Once testing is complete, a Line Call Out is assigned to the compound according to the basic and Suffix Requirements the compound has met.
Suffix Letter Test Required
