White masterbatch range of applications
White masterbatch in the film wide range of applications, there are courier bags, milk films, bags of washing powder, toothpaste tubes, protective film, food packaging bags, etc., in addition to white masterbatch in the film which is widely used in the sheet, demand field pipe, blow molding, injection molding products, also great. These applications primarily through white masterbatch with the resin in an extruder and then blended through blown film, salivation, stretch blow molding, injection molding and other processes. White masterbatch applications cover packaging industry, consumer electronics, real estate, automobiles, household appliances industry, so that the white master batch is an integral part of the national economy.
Optional white masterbatch main aspects to be considered five
1, Whiteness
Whiteness of white masterbatch Masterbatch mainly by the titanium dioxide to render, and factors affecting the whiteness of titanium dioxide, many of them including the size of the titanium dioxide particles, shape and size distribution, the type and content of impurities and lattice titanium dioxide particles defects. In general, due to the chlorination of titanium dioxide purity higher raw material and less impurities in the manufacturing process, it is better than the chloride process titanium dioxide whiteness sulfuric acid method. In reality, the white mother marketplace, a lot of white masterbatch manufacturer by adding equal ash content of calcium carbonate, barium sulfate, titanium dioxide, zinc sulfide to impersonate, in fact, these inorganic powder whiteness and titanium dioxide is unparalleled .
2, hiding
White Masterbatch user requirements is also hiding a very important indicator of good hiding power means that the pigmented strong, with a small amount of the desired effect can be obtained, depending on the hiding power of titanium dioxide white masterbatchselection and processing technology, compared to rutile titanium dioxide anatase titanium dioxide having a smaller and tighter unit cell, and a larger index of refraction, opacity and so anti-UV performance is significantly better than that of anatase resistance, for using the same type of rutile titanium dioxide white masterbatch, titanium dioxide, small particle size, narrow particle size distribution, good dispersion in the masterbatch hiding power of titanium dioxide is significantly larger than the particle size distribution width, poor dispersion in the masterbatch good performance. Similarly, a common calcium carbonate, barium sulfate, zinc sulfide and titanium dioxide hiding power is not comparable.

3, the dispersibility
There dispersion of titanium dioxide used in plastics is an important influence, in general, the finer particles of titanium dioxide, the better the dispersion, the higher the coloring strength, and when the film requires fine print, using the dispersion of fine white mothergrain pattern clarity, layering, better brightness, which is due to microscopic smoothness of the basement membrane material is one of the determinants of good or bad quality of the printed pattern.
4, moisture content
White masterbatch masterbatch for the moisture content of the performance also plays an important impact on the general to control the moisture content 1500ppm or less, demanding to be at 600ppm or less, in the injection molding process, in general, in the production of raw materials will be dried before while in film production, the customer and the carrier are bought after the premix be used directly, if the moisture content of the masterbatch high, will directly lead to a serious rupture, but also the formation of small bubbles in the film, "crystallization point" and other defects, which causes white masterbatch high water has an impact from the selection of raw materials to the masterbatch process.
5, odor
Some film makers in the use of white masterbatch, will smell a strange odor, which is absolutely not allowed in milk film and film in contact with food, which is mainly due to the titanium dioxide masterbatch in organic process, the choice of coating additives inappropriate or add excessive or masterbatch production process selected dispersants have a problem, you can replace white masterbatch grades.