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Closed-cell Materials : |
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Neoprene/Vinyl-Nitrile
Blend |
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Neoprene |
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PVC/NBR |
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Vinyl/Nitrile |
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EPDM |
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Cross-linked Polyethylene |
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*Classification of Flexible Cellular Materials According to ASTM
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Flexible cellular materials are identified (per ASTM D1056) by a three character Grade Number (ex: 2A2).
The three characters represent type, class and grade, and are defined as follows: |
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Type: |
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- Type 1 = Open cell
- Type 2 = Closed cell
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Class: |
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- Class A = Non-oil resistant (ex: EPDM)
- Class B = Oil resistant, low swell (ex: Nitrile)
- Class C = Oil resistant, medium swell (ex: Neoprene)
- Class D = Extreme temperature resistance (ex: Silicone)
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Grade: |
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Grade ratings represent the amount of force in pounds per square inch to deflect the sample 25% of its
original height (compression deflection). |
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- Grade 0 = less than 2psi
- 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)
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