| At the time of using nanometer calcium carbonate, different rubber products manufacturers have different feedback, affect the quality of the filling effect of nanometer calcium carbonate in rubber factors what?
Type a, crystal
In different crystal forms of nanometer calcium carbonate, nano calcium carbonate on chain of rubber reinforcing effect is best.
Second, the particle size
It is advisable to an 80-120 nm, the application of nanometer calcium carbonate in rubber, grain is fine, and the greater the specific surface area of rubber invading each other, as to make the calcium carbonate particles dispersed more and more difficult, especially when under 80 nm, due to the increase of surface energy, in rubber mixing caused easily get hot glue mixing.
Third, surface treatment
To choose the suitable dispersant, to improve blending and dispersion effect.
Four, oil absorption value
Rubber with the higher oil absorption value of nanometer calcium carbonate, calcium carbonate invasion and reinforcement of rubber, the better.
Five, the moisture
Of nanometer calcium carbonate as a rubber filler, water content decreased, the scorch time of the sulfide, is beneficial to improve the curing rate, generally require less than 0.5%.
Six, PH
The influence of PH value of nanometer calcium carbonate in rubber applications mainly affect the curing rate.
PH of nanometer calcium carbonate are generally required for 9-10.5, such as PH value is too low, the slow speed of sulfide, burning a long time, so as to extend the processing time, increase energy consumption. |
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