The processing technology and related equipment of polyolefin filled masterbatch also change along with the continuous alteration of the carrier resin.
The carrier resin used in the first-generation polyolefin filled masterbatch (APP masterbatch) is domestic random polypropylene (which is actually a by-product of polypropylene production). The processing technology is: mixing - open mill drawing - water-cooled pelletizing. It is an intermittent production, and the equipment used includes internal mixers, open mills and flat plate pelletizing machines.
The second-generation polyolefin filled masterbatch uses LDPE (1F7B) as the carrier resin, and the masterbatch produced is called PEP masterbatch. This technological process must adopt a specially designed and manufactured single-screw extruder with a large length-to-diameter ratio and high mixing performance in order to achieve better results.
The filler masterbatch with polypropylene powder as the carrier, namely PPM masterbatch, is called the third-generation filler masterbatch in China. Generally, the method of using a blend of polypropylene and polyethylene as the carrier resin will yield good results. The product not only retains the characteristics and application scope of PPM masterbatch, but also can adopt the die surface hot cutting air-cooling process, which improves production efficiency and reduces raw material costs.
The best processing equipment for making filler masterbatch is the co-rotating twin-screw extruder. The advantages of this machine are continuous production, stable quality, high production efficiency, low energy consumption, low labor intensity for workers and good operating environment.
The concentration of fillers and additives in the masterbatch is high. When in use, a certain amount of base resin must be added, mixed and then processed into shape. The fillers mainly play a filling role. Fillers and additives can endow plastic products with special functions, such as light, electricity, flame retardancy, and degradability, and are called functional filler masterbatches. Functional masterbatches typically include color masterbatches, light conversion masterbatches, high-efficiency insulation film masterbatches, anti-fogging masterbatches, and degradation masterbatches, etc.
Masterbatch is a special granular material used to color plastic products. It can be classified into polyolefin type, ABS type, PS type and AS type, etc. according to the types of colored plastics. The production process of masterbatches is usually divided into two steps: The first step is to prepare pigment pre-dispersions, that is, to surface treat the pigments with dispersants or other additives; The second step is to melt and granulate the pigment pre-dispersion with the carrier resin to obtain the color masterbatch. Masterbatch is composed of pigments, dispersants, carrier resins and an appropriate amount of additives. The main function of the dispersant is to fully disperse the pigment, evenly distributing it in the carrier resin and the base resin, and ultimately obtaining plastic products with uniform color. The carrier resin used for masterbatch should first have good compatibility with the resin to be colored, and secondly, the fluidity of the carrier resin should be greater than that of the resin to be colored to facilitate better dispersion of the pigment. The composition of the masterbatch, the selection and dosage of pigments depend on the properties of the plastic to be colored. Generally, the pigment content in the masterbatch used for coloring polyolefin plastics is 20% to 40% (by mass fraction).
About UsThe company's main products include black and white masterbatches, colored masterbatches, and various functional masterbatches. It is mainly used in the plastic industry such as film blowing, blow molding, bag blowing, injection molding, sheet, pipe, wire, drawing, pelletizing, wire and cable, and modification of engineering materials.
ProductThe company's main products include black and white masterbatches, colored masterbatches, and various functional masterbatches. It is mainly used in the plastic industry such as film blowing, blow molding, bag blowing, injection molding, sheet, pipe, wire, drawing, pelletizing, wire and cable, and modification of engineering materials.
Industry applicationThe company's main products include black and white masterbatches, colored masterbatches, and various functional masterbatches. It is mainly used in the plastic industry such as film blowing, blow molding, bag blowing, injection molding, sheet, pipe, wire, drawing, pelletizing, wire and cable, and modification of engineering materials.
NewsThe company's main products include black and white masterbatches, colored masterbatches, and various functional masterbatches. It is mainly used in the plastic industry such as film blowing, blow molding, bag blowing, injection molding, sheet, pipe, wire, drawing, pelletizing, wire and cable, and modification of engineering materials.
Contact usThe company's main products include black and white masterbatches, colored masterbatches, and various functional masterbatches. It is mainly used in the plastic industry such as film blowing, blow molding, bag blowing, injection molding, sheet, pipe, wire, drawing, pelletizing, wire and cable, and modification of engineering materials.
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