High Filling Masterbatch Granulation, Winning in Details: How To Choose The Right Or Expensive Co Rotating Twin-screw Extruder?
1, High filling masterbatch under the green wave: an irreversible industrial opportunity
Filling is reducing carbon emissions "is becoming a consensus in the global plastic industry. The new packaging regulations of the European Union in 2026 explicitly require a reduction in the consumption of virgin resins. According to the European Plastics Processing Association (EuPC) White Paper 2025 on Plastic Filling and Enhancement, the use of high filling masterbatch with a filling ratio of ≥ 70% can reduce the carbon footprint of end products by more than 35%. The "2025 Annual Report on China's Masterbatch Industry" by the China Plastics Processing Industry Association also pointed out that the domestic production of high filling masterbatch will reach 6.8 million tons in 2024, a year-on-year increase of 11.2%. Behind this explosive growth is the high filling masterbatch that combines a large amount of inexpensive inorganic powder with carrier resin, achieving environmental goals while significantly reducing raw material costs. For international customers who are trying to produce new materials and pursuing high cost-effectiveness, high filling masterbatch granulation is no longer an option, but a intersection of profit and responsibility. And the starting point of all of this is a professionally matched extruder.
2, Core selection: Why is the co rotating twin-screw extruder the "golden partner" for high filling masterbatch
The challenge of high filling masterbatch is that when the amount of inorganic powder added exceeds 70% or even reaches 85%, the viscosity of the melt sharply increases, and the risks of uneven dispersion, bridging, and decomposition increase exponentially. The conveying and mixing capacity of a single screw extruder is almost ineffective here, while a co rotating twin-screw extruder, with its modular screw combination and precise shear control, has become the only preferred option. The Euromap 2024 technical report comparison shows that when processing an 80% calcium carbonate filling system, the dispersion and mixing efficiency of the co rotating twin-screw extruder is increased by more than 50% compared to a single screw, while energy consumption is reduced by 18%. This is thanks to its twin screws that rotate in the same direction as the meshing, which can generate forced conveying and high-speed surface renewal, completely eliminating dead zones. Nanjing Kelongwell Chemical Machinery Co., Ltd. has designed a dedicated co rotating twin-screw extruder for high filling masterbatch, with a length to diameter ratio ranging from 44:1 to 52:1. By configuring a large number of kneading blocks and toothed discs, the powder can be dispersed to the micrometer level while maintaining low resin degradation, thereby endowing high filling masterbatch with excellent mechanical and processing properties. One sentence: Without a co rotating twin-screw extruder, there can be no stable and cost-effective high filling masterbatch granulation.
3, Analyzing the High Cost Performance Extruder: The Detail of Turning Every Investment into Masterbatch Profit
Customers often ask for the first time, 'Does a high cost performance extruder mean rough and low configuration?' On the contrary, a true high cost performance extruder is one that accurately invests costs in the core components that determine lifespan and production capacity. COLOWE's practice has shown that the following details determine whether your high filling masterbatch production line is a printing press or a shutdown line:
1. Wear resistant engineering of screws and bushings: The high filling system can corrode metals as much as sandpaper. The COLOWE co rotating twin-screw extruder adopts double alloy centrifugal casting and integral quenching treatment for the screw edge and liner. It has been tested that under the condition of 80% barium sulfate masterbatch, the component life is extended by 2.3 times and the annual maintenance cost is reduced by 42%.
2. Exhaust and vacuum volatilization: If the moisture and low molecular weight volatiles carried by the filling powder are not removed, the internal pores and rough surface of the masterbatch will become fatal defects. By using a multi-stage vacuum co rotating twin-screw extruder, the volatile matter can be controlled below 0.3 ‰, achieving bright and dense pellets. This detail directly determines whether high filling masterbatch can be used for high-end films and injection molding.
3. Side feeding forced addition: Fluffy ultrafine powder is prone to bridging at the feeding port. High cost-effective extruders must be equipped with high torque side feeders and flexible vertical feeding systems to ensure feeding stability. According to actual tests conducted by COLOWE International customers, after optimizing this process on a co rotating twin-screw extruder, the calcium carbonate filling amount remained stable at 82% and the production capacity fluctuation was less than ± 2%.
4. Precise temperature control logic: The cutting and heating of high filling materials are severe. If the temperature control exceeds 5 ℃, the carrier resin may degrade and turn yellow. Each section of the COLOWE cylinder is independently PID controlled, with an accuracy of ± 1 ℃, and adopts a reverse cooling design, allowing for quick acquisition of snow-white and flawless masterbatch samples even when encountering new materials for the first time.
4, First time encountering high filling masterbatch granulation? These pain points have solutions (practical Q&A)
Q: I am trying to use local stone powder to make new materials. How can the high filling masterbatch bridge be broken?
A: Bridge construction is often due to the use of powder arches. The core is to make the feeding section of the co rotating twin-screw extruder feel hungry. The Kelongwell solution adopts an increased lead depth spiral groove conveying element, combined with vibration loosening and forced side feeding, to keep the feeding area always in a loose filling state. At the same time, controlling the moisture content of the powder below 0.5% can cure large-scale bridging.
Q: The investment in co rotating twin-screw extruders is not cheap. How to choose a truly cost-effective extruder for the first investment?
A: High cost performance extruders are not compared to unit price, but to the factory cost per kilogram of masterbatch. Please focus on three sets of data: rated production capacity, unit energy consumption (kWh/kg), and unplanned downtime rate under the same formula. The COLOWE co rotating twin-screw extruder produces 80% calcium carbonate high filling masterbatch, with a stable production capacity of 800-1200kg/h, a ton power consumption of 0.25-0.28kWh, and a transmission box design life of over 100000 hours. The comprehensive ton cost can allow you to recover the premium within 12 months.
Q: Can one machine adapt to different filling masterbatch to quickly respond to overseas orders?
A: Absolutely possible. This is precisely the ingenuity of the block type co rotating twin-screw extruder. By simply changing the kneading block combination and temperature setting, the same cost-effective extruder from COLOWE can smoothly switch between various high filling masterbatch such as calcium carbonate, talc powder, titanium dioxide, biomass filling, etc. International customers who come into contact for the first time can also use the testing machine platform of COLOWE to quickly complete the process package curing of new formulas.
5, COLOWE: Reliable pivot point for high filling masterbatch granulation in your global layout
Faced with the complexity of international environmental regulations and the differences in raw materials in different regions, Nanjing Kelongwell Chemical Machinery Co., Ltd. is deeply engaged in the research and development of co rotating twin-screw extruders, with a high filling masterbatch granulation system as the core, providing full chain services from material testing, process design to CE certification export. Our cost-effective extruder not only delivers equipment, but also stable quality and transparent energy consumption data, allowing every customer who enters the high filling masterbatch field for the first time to quickly build competitiveness. When you stand at the starting point of creating green profits with high filling masterbatch, COLOWE is willing to use professional co rotating twin-screw extruder solutions to help you turn every grain of calcium carbonate into a golden key to opening up the international market.
