TiO2 White Master Batch compounding pelletizing line

Description about Application

White Master Batch(TiO2 Master Batch) is a type of color master batch, it is widely used in plastic products industry, almost covering the whole plastic products industry, such as all kinds of injection products, all kinds of film, sheet, pipe and other building materials industry.

The disadvantages of single stage twin screw extruder with water strand pelletizing process: The traditional production process compounded by a twin screw extruder , then through water cooling strand and cutting into pellets. The biggest disadvantage of single stage twin screw extruder is that the twin screw extruder cannot bear high die pressure, so the strip extruded from the die is not dense, and the process of cooling traction process in the water tank absorbs higher moisture. Extra drying is required. On the other hand, a single-stage twin-screw die head pressure is too high, which leads to a large increase in current, and reduces the output.

In response to the above-mentioned process shortcomings, the company introduced a two-stage extruder + water ring granulation production process, the upper stage uses a twin-screw extruder, the second stage uses a conical twin-screw extruder, and the granulation method is water ring granulation. The double-stage granulation process has the following advantages:

1. The upper stage twin screw extruder L/D=48~52:1 high torque twin screw extruder, long length screw is good for sufficient compounding and dispersion. With natrual venting port or vacuum degassing port to eliminate the volatiles in the melt.

2. The second stage uses a conical twin screw extruder to compact the homogenized melt, cool and deliver to the die for granulation. The conical twin-screw extruder is able to withstand higher die head pressure, resulting in more compacted pellets and increasing extrusion output. The dense granules can reduce the water absorption at the granulation stage while increasing the surface gloss.

Adopts water ring granulation method. Water ring granulation can be applied to formulations with large differences in melt characteristics. For example, the masterbatch in different proportions of TiO2 content, CaCO3 powder, and fluorescent whitening agent can be successfully pelletized. On the other hand, the water ring cutting have a shorter residence time in the water, and the moisture content after the dehydrator and the vibrating screen is less than 0.1%, and no additional drying is required.

Twin screw two stage extruder unit model:

The core extruder equipment includes parallel twin screw compounding extruder, reciprocating

compounding kneader, double rotor compounding extruder, SCP high viscosity self cleaning

reactor and large capacity devolatilizer, etc.

At the same time, based on the above main extruder, the design and manufacture of a

complete set of compounding pelletizing production line equipment and compounding

extrusion forming production line equipment can be realized. It is mainly used in the fields

of engineering plastics, modified plastics, wire and cable materials, rubber, packaging,

building medical chemical industry, chemical fiber textile, household appliance and other

industries (see the application case for details).

The existing factory area of the company is 46500 m2 (of which the parent company is

38000m2, and the subsidiary (Nanjing Cenmen) is 8500m2), The core parts and system

of the extruder are designed and manufactured by the company, such as barrel, screw,

gear box, etc. The company has advanced NC machining center, NC screw grinder,

CNC machine tool and other machining equipment. Equipped with Swiss imported

three-coordinate detector and Japanese imported spectral detector and other

advanced inspection and testing equipment. There are complete quality control means

and system from processing to testing, which fully ensure the stability and reliability of

product quality.

The extruders produced by Cenmen company are exported to nearly 40 countries, such as

Germany, Russia, belarus, Japan, Korea, Israel, Ukraine, magiddon, Iran, Thailand, Indonesia,

Brazil, India, Mexico, South Africa, etc.