Analysis of Application Performance of Titanium Dioxide in Plastics

Since the coating film of plastic products is much thicker than that of paints and inks, it does not require too high pigment volume concentration.

Analysis of the specific application of titanium dioxide in the plastic industry and color masterbatch industry

Most of the titanium dioxide used for plastics has a relatively fine particle size.

Ordinary plastic titanium dioxide generally does not undergo surface treatment, because the conventional hydrated aluminum oxide and other inorganic materials coated titanium dioxide, when the relative humidity is 60%, its adsorption equilibrium water is about 1%, when the plastic is extruded at high temperature During processing, the evaporation of water will cause pores on the smooth plastic surface.

With the continuous expansion of the application range of plastic products, many external plastic products, such as plastic doors and windows, building materials and other outdoor plastic products, also have high requirements for weather resistance.

The composition of plastics includes resins, fillers, plasticizers and other additives (such as colorants, antioxidants, flame retardants, etc.

Extrusion blow molding process of plastic film:

Resins, fillers, and additives masterbatch ingredients (masterbatch plus resin) blown film plastic film

The main equipment used in this process is a double-roll mill and a film blowing machine

The plastic injection molding process includes three stages of plasticization, injection, and molding cooling.

The quality requirements of plastic products for titanium dioxide are:

Hiding power: Titanium dioxide with good hiding power makes the plastic products lighter and thinner;

Whiteness: determines the appearance of light-colored or white plastic products;

Dispersibility: It affects the production cost of plastic products.

Weather resistance: Plastic products used outdoors and plastic doors and windows must ensure the weather resistance of titanium dioxide

Masterbatch

  Plastic masterbatch is a highly concentrated, high-performance color configuration product, that is, the pigment is uniformly distributed in the carrier resin at an extraordinary concentration and forms particles with a certain particle size

  Color masterbatch can be used to match colors of PVC, polyethylene, polypropylene, polystyrene and ABS plastics

  There are several production processes for color masterbatch, such as: pigment, resin, dispersant, volume pigment, other additives, high-speed mixer, twin-screw extruding color masterbatch

  Color masterbatch is used as an industrial raw material, and its performance is usually manifested in subsequent product applications (such as blown film or injection molding).

  1) The coloring ability of titanium dioxide: determine the amount of titanium dioxide used in the same color of plastic products;

  2) Whiteness of titanium dioxide: determines the appearance of light-colored (white) plastic products with the same content of titanium dioxide;

  3) The dispersibility of titanium dioxide: it affects the production cost of color mesh particles and the appearance and gloss of plastic products;

  4) The processing performance of titanium dioxide: affect the production cost of masterbatch