1) The performance of heat resistant water and superheated steam
The stability of rubber compound to hot water is not only determined by the main material, but also by the proportion of rubber material. For rubber blends, peroxide-vulcanized rubber blends are superior to amines and phenolic vulcanized rubber materials. Rubber mixing rubber heat water and superheated steam performance is general, not as good as epDM rubber, 18024h after soaking in hot water volume change in 10% or less, physical properties should be said to have no great change.
2) Mechanical properties under normal conditions
The general fit strength of type 26 rubber rubber is 10-20mpa; 150-300% growth rate; The tearing strength is between 20-40kN /m, but the elasticity is poor. The friction coefficient of fluorine rubber (0.8) is less than that of nitrile rubber) 0.9~1.5).
3) High temperature resistance
The high temperature resistance of rubber compound and rubber compound is better in rubber at present. F26-41 fluororubber can be used for a long time under 200~250, and can also be used for a short time under 300 (refer to Table 1). F246 has a slightly better heat resistance than F26.
4) Corrosion resistance
Rubber blends have excellent corrosion resistance. Good stability to organic liquid, different fuel oil, lubricating oil. It has good corrosion resistance to most inorganic acids, hydrocarbons, benzene and toluene. It is weak only against low molecular esters, ethers, ketones and some amines.
5) Compression deformation performance
Rubber compound is used for high temperature sealing, compression deformation is an important performance. Tool type fluorine rubber is widely used, and its compression deformation improvement is inseparable. Dupont began to improve the tolerance of fluorine rubber to compression deformation in the 1960s and 1970s, and achieved remarkable results
6) Low temperature resistance
The low temperature resistance of rubber blends is general, and the limit temperature of elasticity can be maintained from -15 to -20. As the temperature drops, the tensile strength increases, making it look tough at low temperatures. The brittleness temperature of standard sample with thickness of 2mm is about -30. -45 when the thickness is 1.87mm; -53 when the thickness is 0.63mm; -69 at 0.25mm thickness.
The gas solubility of rubber compound is relatively large, its diffusion rate is relatively small, and the total permeability is small. In rubber compound, the air permeability of vulcanized rubber is smaller and conducive to vacuum sealing by adding filler to fill the gap inside the rubber. With the right combination, rubber rubber can solve the vacuum seal of 10-7Pa.
8) flame retardant
The rubber mix will automatically disappear when it catches fire.
9) Electrical performance
The electrical insulation of rubber compound is not good, suitable for use under low frequency and low pressure. Temperature has a great influence on its electrical properties, from 24 to 184, the insulation resistance will decrease by 35,000 times.
10) Weather resistance and ozone resistance
After ten years of natural preservation, the performance is still satisfactory. In the air with ozone concentration of 0.01%, there was no obvious cracking after 45 days. Its weather resistance and ozone resistance are satisfactory.
The above introduction is what the characteristics of rubber mixing rubber, if you need to know more, you can contact us at any time!