Views: 0 Author: MEPER MACHINE Publish Time: 2022-10-28 Origin: MEPER MACHINE
We share the application of titanium dioxide in blow molding. Let's first understand what titanium dioxide is. Titanium dioxide is an important inorganic chemical product. It has important applications in industry, such as paint, ink, paper, plastics, chemicals and ceramics. The main component of titanium dioxide is titanium dioxide (TiO2) of the white pigment, called titanium dioxide.
The plastics industry is the second largest application of titanium dioxide (TiO2) and the fastest growing industry in recent years, with an average annual growth rate of 6%. More than 50 of the world's 500 titanium dioxide brands belong to specialty plastic brands. The application of titanium dioxide in plastic products, in addition to its high covering power, color elimination power and pigment performance, can also improve the heat resistance, light resistance and weather resistance of plastic products, protect plastic products from UV damage. Improve the mechanical and electrical performance of plastic products.
Because plastics are much thicker than paints and inks, they do not require much volume concentration of pigment. Add it to cover the force is high, coloring force is strong, the general dosage is only 3%~5%. It is used in almost all thermosetting plastics and thermoplastics, such as polyoxyethylene. LEFIN (mainly low density polyethylene), polypropylene, ABS, PVC, etc. It can be mixed with dried tree powder or liquid containing plasticizer. Some titanium dioxide (TiO2) is processed into masterbatch before use.
The titanium dioxide used in most plastics has a very fine particle size. The titanium dioxide used in the coating (TiO2) particle size is 0.2-0.4 micron, the titanium dioxide used in the plastic particle size is 0.15-0.3 micron, so you can get the blue base phase, to yellow resin or easy to yellow resin shading effect. General plastic with titanium dioxide is generally not after surface treatment, because the use of traditional hydrated alumina such as inorganic coated titanium dioxide, in the relative humidity of about 60%, its adsorption equilibrium water in about 1%.
When the plastic is extruded at high temperatures, water evaporation will smooth the surface pores of the plastic. This titanium dioxide has no inorganic coating and is generally treated with an organic surface (polyol, silane or siloxane). Since plastic titanium dioxide is different from coated titanium dioxide, the former is mixed by shear force treatment in a less polar resin, organic surface treatment of titanium dioxide, under appropriate mechanical shear force, can be better dispersed.
Two methods to identify titanium dioxide:
The first is physical:
1. The simple way is to compare the feel, the fake titanium dioxide is slippery, the real titanium dioxide is astringent.
2. Water, hand with titanium dioxide, fake easy to wash off, really not easy to wash off.
3. Take a cup of water, pour into titanium dioxide, float up for true, float down for false (if activated modified products do not work).
The second is chemical:
1. Mix with light calcium or heavy calcium: add dilute sulfuric acid or hydrochloric acid, bubbles will make lime water cloudy, because calcium carbonate will react with acid to produce carbon dioxide.
2. Mix with Lide powder: Add dilute sulfuric acid or hydrochloric acid to taste rotten egg.
3. Made of rubber paint, plus iron red, dark color, indicating that poor hiding power is false or poor quality titanium dioxide.
Finally, to sum up:
Titanium dioxide is not only used as a colorant in blow molding industry, but also has the functions of strengthening, anti-aging and filling. White and color plastic products in the addition of titanium dioxide, sunlight resistance, fission resistance, high tensile rate, acid and alkali resistance and other characteristics.
The application of titanium dioxide in blow molding is introduced here.