Rubber additives products in addition to melting point, heating, weight reduction, ash, sieving residues testing projects, there are some often encountered testing projects, downstream customers or rubber additives industry needs to pay attention to, in line with the original intention of serving the rubber industry, we will continue to collect and share with you.
1. At the beginning of melting point
The temperature at which the first drop of liquid begins to appear on the capillary wall is the initial melting point (normally the sample discoloration and shrinkage do not count).
2. The melting point
The temperature at which the sample is completely liquefied in a capillary tube is the final melting point of the sample.
3. The softening point
The sample is softened by heat, and the temperature at which the sample and the steel ball come into contact with the floor surface when falling together.
4. Heat and reduce quantity
The amount of volatile matter removed after heating. It has to do with temperature and time.
5. Ash
The amount of ash residue left after heating and burning.
6. The zinc content
The percentage of the substance that contains zinc.
7. Screenings
Percentage of the sample that cannot pass through the screen. Sieve residue is the antonym of fineness, which is the number of mesh through which a sample passes.
8. Diameter particles
The diameter of particles or particles in a sample.
9. Purity
The amount of pure substance in a sample.
10. Content
The amount of material containing tha sample.
11. The free M
It has M ions in it.
12. Free amine
The amount of amine ions in the substance.
13. Methanol of insoluble substance
The amount of material that is insoluble in methanol.
14. The sulfur content
The percentage of sulfur in the substance is similar to the definition of zinc content.
15. The oil content
The amount of white oil in a substance. It is quantitative add quantity commonly.
16. The proportion
Liquid density is usually expressed in specific gravity or baume degree.
17. The density
Mass divided by volume. Generally, the density ratio of water to water is 1.0kg/m3
18. Bulk density
Also called loose density. Density of material without extrusion, unit: kg/m3
19. PH value
Ph of a substance. It is usually detected in solution, and solids should be dissolved or suspended in liquid.
20. The nitrosamines
Typical structure: R-N=O, source and nitrogen oxides in the air under heat or high temperature will produce nitrosamines.
21. The heavy metal
It is common to detect 8 metal 1 mercuric, it is copper, lead, chromium, iron, cadmium, manganese, nickel, cobalt, mercuric respectively.
22. High attention to matter
SVHC, which has been updated to 198 items as of May 2019.