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 |