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TECHNICAL DATA - October 1997
Description
FR60RP is a flame retardant grade of silicone rubber designed for use in the production of items with the following specifications.
High resistance to flame, requiring emission of only limited quantities of fumes to be of low toxicity and low opacification.
| Physical
Properties |
|
| Shore A Hardness, points, approx | 61 |
| Secant modulus at 100% elongation, Mpa, approx | 4.5 |
| Tensile strength, Mpa, approx | 7.8 |
| Elongation at break, % approx. | 165 |
| Tear strength, KN/m, approx. | 10 |
| Rebound resistance, % approx | 55 |
| Dielectric
properties |
|
| Dielectric strength(thickness 2mm), kV/mm, approx | 22 |
| Dielectric Constant at 1 MHz, approx | 3.2 |
| Power dissipation at 1 MHz, approx | 5.3 x 10-3 |
| Transversal resistivity, Ohm.cm, approx. % | 2 x 10+15 |
Properties after thermal ageing
| 10 days at 200° C | 7 days at 250° C | |
| Shore A Hardness, points, approx. | 66 |
67 |
| Tensile strength, Mpa, approx. | 7 |
6 |
| Elongation at break, % approx. | 145 |
110 |
Fire resistance:
Flame resistance-vertical combustion: classification UL 94 VO, 2mm
Limit oxygen index (norm NF T 51071, 1985),%, approx. : 39.
Incandescent wire (norm NF C 520455):class I2,( class I2= limit oxygen index ³ 32%, without flaming of the elastomer during and after application of the incandescent wire at 850° C
Opacity and toxicity of fumes:
Smoke opacity to AFNOR norm NF X 10702 Smoke Index : S.I. approx. . : 4
Smoke toxicity to AFNOR norm NF X 70100 Conventional Toxicity Index : CIT. Approx. : 2.3
The FO class can be obtained from the results of these tests