Material Table
| Section | Subject | Unit | Reference value | Remarks |
|---|---|---|---|---|
| Bubble | Appearance density | g/㎤ | 0.025~0.04 | Difference of specific gravity depending upon magnitude of foaming. |
| Dynamic properties | Diameter of appearance bubble on average | m/m | 0.26~0.33 | Difference of specific gravity depending upon magnitude of foaming. |
| tensile strength | kg/㎠ | 2.2~3.4 | ||
| elongation | % | 130~140 | ||
| elongation strength | kg/㎠ | 0.52~1.6 | ||
| compression hardness | kg/㎠ | 0.3~0.4 | ||
| thermal properties | working temperature | ℃ | ―70~80 | |
| heat transmission (20℃) | Kcal/mhr℃ | 0.027~0.04 | ||
| combustion rate | cm/min | 6.4~10.0 | ||
| insulation | good | |||
| water resistance | absorption, water adhered | mg/㎠ | 0.03 or less | |
| steam penetration | g/㎡hr | 0.01 or less | ||
| water resistance | good | |||
| electrical properties | dielectric constant | ε (1Khz) | 1.05~1.58 | |
| volume resistivity | Ω Cm | 10Ω or more | static product (superficial resistance) | |
| insulation | KT mm | 4.8 | ||
| others | chemical resistance | good | ||
| toxic (hygienic test) | no toxic, no smell | |||
| thermal porosity | easy | |||
| floating | g/ℓ | 880 | ||
| sound proof, sound blocking | good |