1. Fully plasticized and evenly dispersed
The three screws arranged in a straight line expand the rolling area, strengthen the kneading effect, and have a better plasticizing effect. Due to the existence of two meshing areas, the rolling area is doubled to make the dispersion more uniform.
2. High output
Taking the production of carbon black masterbatch as an example, the 3-Φ60 machine can produce 50% concentration of carbon black masterbatch at one time without high stirring, and the output is 180 kg/hour; while the 2-Φ60 (twin-screw machine of the same model ) can only produce carbon black masterbatch with a concentration of 35% without the help of high-stirring internal mixing or repeated processing, 80 kg/hour.
3. Energy saving
Taking the 3-Φ60 machine as an example, the main motor is 55kw, 500 rpm, producing 50% concentration carbon black masterbatch, 180kg/hr, the main motor current is 90 amps, and the specific power is only 0.2-0.25kw/kg.
4. High product quality
Example 1: The twin-screw extruder produces 50% concentration carbon black masterbatch, which must be internally mixed, and the masterbatch produced is fragile. The three-screw extruder does not require an internal mixer. The materials can be directly entered into the three-screw extruder to produce a 50% concentration carbon black masterbatch with better toughness.
Because it is fully plasticized and its components are evenly dispersed, it can be used to blow films and the test results are very uniform. With the help of a high mixer, the three-screw extruder can produce carbon black masterbatch with higher concentration and better particle toughness.
Example 2: PE or PP masterbatch filled with 85% calcium carbonate produced by a twin-screw machine is not as tough as the masterbatch of the same proportion produced by a three-screw machine, and it cannot be broken even by dehydration and drying with a centrifugal dehydrator.
Example 3: Produce PP flame-retardant cable material. After internal mixing, the material is made using a 2-Φ65 twin-screw extruder with an aspect ratio of 36. The material has a strength of 13Mpa and an elongation of 185%. Using a 3-Φ60 three-screw machine without internal mixing, the strength of the material produced is 14Mpa and the elongation is 237%.
5. It has molecular grafting function and can be directly used to produce PP foam beads.
PP foaming must use high melt strength polypropylene (HMS-PP), which requires molecular grafting of ordinary PP, and its price is much more expensive than ordinary PP. The molecules have branches and have sufficient melt strength and ductility to be suitable for PP foaming.
After testing, ordinary PP (homopolymer or copolymer PP can be used) can be directly used to produce good EPP beads after extrusion with a three-screw machine. This is because ordinary PP has been molecularly grafted during the flow process in the three-screw machine and turned into polypropylene with high melt strength.
6. The machine is safe, reliable and easy to operate
