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Heat resistance
PVC, PE pigment temperature resistance 160-180 degrees Celsius
ABS, PS pigment temperature resistance 250-280 degrees Celsius
PP, PA, PET pigments are more than 280 degrees above temperature
It is generally required that the heat resistance time of the pigment is 4 to 10 minutes. Generally, the higher the use temperature, the shorter the heat resistance time. Indigo blue pigment temperature 325 degrees Celsius, 10 minutes discoloration
2, mobility
The migration resistance of pigments means: colored plastic products and other solid, liquid, gas and other conditions, long-term contact with materials or work in a specific environment, may have physical and chemical interaction with the above substances, expressed as pigments from plastic interior Migrate to the free surface of the article or migrate to an adjacent plastic or solvent.
Migration resistance rating standard
Level 1 Level 2 Level 3 Level 4 Level 5 Severe Migration Significant Migration with Migration Minor Migration No Migration
3. Most of the inorganic pigments have good light resistance.
4. Weather resistance refers to the color stability of pigments under natural conditions.
5. Titanium dioxide is divided into: anatase (A) titanium dioxide rutile (R) titanium dioxide
Titanium dioxide can improve hiding power, weather resistance, fading resistance, etc.~~~
When the concentration of titanium dioxide is low, the whiteness of PP increases with the increase of its content. When the concentration exceeds 1.5%, the whiteness no longer rises, from 1% to 8%, the whiteness increases by 2.8%, which indicates that the concentration exceeds a certain concentration. After the range, increasing the amount of titanium dioxide does not increase the whiteness. In order to further improve the whiteness, a fluorescent whitening agent can be used, and the tinting strength of the titanium white powder can be significantly improved by using only a small amount of the fluorescent whitening agent.
Titanium dioxide, alias: titanium dioxide
Titanium dioxide allows plastics to effectively scatter visible light while imparting whiteness, brightness, and opacity.
The concentration of titanium dioxide in PP\\\\ ABS is 1%; in PVC, it is 4%; as the amount of titanium dioxide increases, its hiding power gradually increases, and when the concentration is greater than 8%, it tends to balance.
In general, the finer the titanium dioxide particles, the higher the tinting strength and the stronger the hiding power.
6. Cadmium yellow has strong tinting strength, excellent light and weather resistance, no migration, no bleed (toxic paint). This product can be used as a yellow coloring agent for plastics. It has bright colors, excellent light resistance, heat resistance, solvent resistance, water resistance and alkali resistance, but it is not resistant to acid, coloring and hiding power.
7. Ultramarine has the function of whitening and coloring, which can remove the yellow color in white products.
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