35B Twin-screw Extruder: Opening A New Era Of High-efficiency Pelletizing And New Material R&D With The Advantage Of Critical Size
In the plastics pelletizing and modification area, equipment selection is a strategic decision about efficiency, flexibility and long-term return. When many first-time contacts or international customers who pursue high cost performance trade-offs between 20B and 35B twin screw extruders, a general but potentially expensive recognition is that selecting a smaller size machine at the start is more "prudent". However, industry data and process practice reveal a different truth: for the vast majority of enterprises seeking sustainable development and innovation breakthrough, 35B twin screw extruder (screw diameter of about 35-36mm) is the real "gold starting point". It not only has the same price as the 20B model, but also has achieved leapfrog improvement in extrusion capacity, material adaptability and return on investment. It is a wise choice for high-efficiency and environmental-friendly plastic pelletizing.
1. Overview of core advantages: Why is 35B a superior strategic option?
Nanjing Kelongwell Chemical Machinery Co., Ltd. understands the market demand, and its 35B series co-rotating twin screw high efficiency extruder is not simply a size amplifier, but an accurate design based on in-depth process understanding. Its superiority lies in an immutable core fact: it successfully broke the traditional contradiction between performance improvement and cost control.
·Exponential jump in performance: approx. 200% increase in screw cross-sectional area of extruder 35B compared to model 20B (screw diameter approx. 20-22mm). This directly translates into single-unit capacity that can be increased by more than 3-5 times. For example, when processing common PP and PE modified materials, 35B extruder can easily achieve stable output of more than 50-80 kg/h, while 20B model is only 10-20 kg/h.
·Affordable cost threshold: although the production capacity is doubled, due to the large-scale production and modular design, there is no significant gap between 35B and 20B models in terms of overall price. This means that the customer can make nearly the same initial investment to acquire a major aircraft capable of meeting future capacity ramps and complex formulation challenges.
·Unparalleled process tolerance: larger cylinder volume and screw combination space make 35B extruder have inherent stability and mixing quality advantages when dealing with high filling (such as calcium carbonate and glass fiber), high viscosity (such as engineering plastics) and reaction extrusion process requiring multi-stage feeding and volatilization, providing solid hardware foundation for developing "new materials".
2. Deep analysis: the three pillars of 35B extruder excellent performance
Pillar I: stronger mechanical configuration and processing capacity
The core strength of the 35B twin screw extruder is rooted in its powerful mechanical design. It is usually equipped with 18.5-22 kW main drive motor, which can provide screw output torque up to 140-160 Nm. The higher specific torque ensures that when mixing high viscosity materials or high filling formula, the screw can still maintain strong conveying and shearing capacity, avoid "hold down" or torque overload, and ensure continuous production.
Direct comparison of key parameters:
·Screw diameter: 35B (≈ 35.6mm) vs. 20B (≈ 21.7mm)
·Main motor power: 35B (18.5-22kW) vs. 20B (≈ 5.5kW)
·Typical production range: 35B (20-80 kg/h) vs. 20B (1-20 kg/h)
Pillar 2: broader material adaptability and formulation flexibility
The 35B extruder is the ideal "process laboratory" and "volume bridge" for customers working on environmentally friendly recycled materials or developing new bio-based materials. Its longer standard length-diameter ratio (L/D can reach 40:1 to 48:1 or higher) and modular modular screw/barrel design allow flexible combination of conveying, mixing, shearing, venting and other functional areas on one screw.
This means that the same equipment can easily switch tasks:
·Post Consumer Recycle (PCR) Plastics: Powerful devolatilization vent section for effective removal of residual moisture and low molecular volatiles.
·Development of Biodegradable Materials (e.g. PLA/PBAT alloys): Accurate temperature control and gentle shearing help control degradation of bio-based materials.
·High fill modification: Sufficient screw length ensures that the filler (e.g. wood flour, calcium carbonate) adequately distributes the wetness.
·Experimental reaction extrusion: provide sufficient retention time and mixing strength for introducing liquid additive or conducting polymerization reaction.
Pillar 3: Future oriented intelligence and sustainable development gene
The global extruder market is developing towards intelligence and green. Nanjing Kelongwell's 35B high efficiency extruder incorporates these genes at the beginning of the design. The integrated PLC touch screen control system can not only realize accurate temperature, speed and pressure control, but also lay a foundation for future industry 4.0 networking and predictive maintenance through data interface. A higher energy efficiency ratio also means lower energy consumption per kilogram of product, directly reducing the carbon footprint, and meeting global environmental regulations and corporate social responsibility (CSR) goals.
3. Key Questions and Answers (Q&A)
Q: We are a start-up R&D company, and the initial production demand is not large. Would 35B be a "big talent"?
A: On the contrary, 35B is the best choice for R&D enterprises. Its outstanding process tolerance allows you to use one equipment to carry out the whole process verification from formula screening, pilot test (the minimum test amount can be as low as 1-2 kg) to medium and small batch trial production. This avoids the risk of scale-up failures due to differences in process windows between small laboratory equipment and production equipment, and accelerates the transfer of R&D results from the source.
Q: Does 35B significantly increase energy consumption and operating costs compared to 20B?
A: B is generally more advantageous in terms of energy consumption per unit output. Although the power of the whole machine is higher, its high output dilutes the processing energy consumption per kg of materials. In addition, more stable operation reduces the labor cost per unit product. Industry tests show that excellent 35B models can reduce unit energy consumption by about 10% through high torque design.
Q: Is 35B more expensive in maintenance and accessories with similar procurement costs?
A: There is no level difference in routine maintenance costs. The core maintenance items of twin screw extruder are regular maintenance of screw barrel and replacement of vulnerable parts. As one of the most mainstream central specifications in the industry, 35B screw elements and spare parts have extremely high market versatility and supply guarantee, and the price system is mature and transparent, which will not constitute additional burden.
4. Confirmation of Industry Trend and Strategic Suggestions
As reported in Global Extruder Market Scale (2025-2034), the twin screw extruder market is growing at a rate exceeding the average level, driven by the demand for complex blending, recycling and efficient processing. Meanwhile, market analysis points out that sustainable practices and circular economy are reshaping the plastic production pattern.
Therefore, selecting a Nanjing Kelongwell 35B co-rotating twin screw high efficiency extruder is not only to purchase a plastic pelletizing equipment, but also to embed a core of "adaptive growth" for the enterprise. At competitive entry costs, it provides you with:
a. Capacity to cope with current diversified production tasks.
b. Embrace the plastic recycling economy and process capital for the treatment of recycled materials.
c. Solid hardware foundation reserved for future capacity expansion, without short-term secondary investment.
In an uncertain market, the greatest certainty comes from the adaptability and potential of the equipment itself. For foresight international customers, skipping the transition specification and directly anchoring 35B, the "singular point of performance and cost balance", is undoubtedly the most insightful first step to start a successful pelletizing business.
