Sulfuric acid method
of anatase titanium dioxide
Due to their orderly molecular arrangement, chemical fibers have a certain degree of transparency and a smooth surface. When exposed to light, the reflected light is very strong, which can produce aurora and make the fibers have a strong luster that is unpleasant to the naked eye.
Titanium dioxide is considered the ideal extinction material for chemical fibers because of its special optical and physical properties among all white pigments. As an extinction agent, it has been widely used in producing chemical fibers.
Although the refractive index of rutile titanium dioxide is higher than that of anatase, the particles of rutile type are harder and more likely to wear out the spinneret holes and cutting blades, so anatase-type titanium dioxide is generally selected as the extinction agent in chemical fibers.
|Refractive index of white pigment and chemical fiber|
|White Pigment||Refractive Index||Chemical Fiber||Refractive Index|
|Barium sulfate||1.64||Acetate fiber||1.37|
|Zinc oxide||2||Viscose fiber||1.546|
|Antimony oxide||2.19||Ketone-amide fiber||1.572|
|Zinc barium white||2||PA-66||1.558|
Titanium dioxide (rutile)
Titanium dioxide (anatase)