UHMWPE Extrusion Machine

This unit is a UHMWPE extruder specially designed for continuous and stable processing of ultra-high molecular weight polyethylene (UHMW-PE). In response to the processing problem of "non flowing" UHMWPE, this production line adopts a dedicated twin screw extruder structure, which achieves stable extrusion of high viscosity materials through forced feeding and low-temperature low shear plasticization technology. The equipment is positioned in the high-end engineering plastic processing field and is an ideal choice for manufacturers to enter or expand into the ultra-high molecular weight polyethylene market.

·Specialized screw configuration: using a combination of screw components optimized for UHMWPE extruders, effectively avoiding molecular chain degradation while ensuring sufficient plasticization.
·Forced feeding system: equipped with vertical or lateral forced feeding devices, perfectly solving the feeding problem of high packing density and poor flowability of ultra-high molecular weight polyethylene powder.
·Low temperature high torque drive: equipped with a high torque gearbox and servo drive system, stable output at low speeds, providing precise low-temperature process window for UHMWPE granulation and forming.
·Super wear-resistant performance: The barrel and screw are made of high wear-resistant alloys (such as HC alloy) and bimetallic bushings, which can withstand long-term friction from ultra-high molecular weight polyethylene and high filling materials.
·Intelligent PLC control: a fully automatic control system that monitors temperature, pressure, and torque in real time to ensure the stability and repeatability of UHMWPE blending and granulation processes.

UHMWPE Extrusion Machine

Why choose this UHMWPE extruder instead of a regular plastic granulator?

When processing ultra-high molecular weight polyethylene (molecular weight ≥ 1.5 million), ordinary single screw or conventional plastic granulation lines often encounter problems such as feeding difficulties, screw locking, and material degradation. Our co rotating parallel twin screw extruder is designed specifically to overcome such challenges, with the following core advantages:
1. Forced conveying capacity: The twin screw meshing area forms positive displacement conveying, completely solving the process bottleneck of difficult feeding of ultra-high molecular weight polyethylene.
2. Precise low-temperature control: Unlike ordinary extruders that rely on shear heat (which can easily cause yellowing and degradation of UHMWPE), this machine uses an external heat source combined with low shear to maximize the retention of the original impact strength and wear resistance of the material.
3. High filling dispersion: During UHMWPE blending modification (such as adding carbon black, graphite, flame retardants, etc.), the twin screw structure can achieve much higher mixing uniformity than the single screw.
4. Flexible product form: It can achieve direct extrusion of profiles and sheets, as well as high-quality UHMWPE granulation, providing high-quality raw materials for subsequent molding, sintering and other processes.

This UHMWPE extruder is widely used in the following industries:
·Industrial wear-resistant parts: plates, rails, liners, gears, etc.
·Medical implants: high-purity ultra-high molecular weight polyethylene orthopedic materials (molded by UHMWPE granulation).
·Battery separator: Preparation of specialized materials for high-end wet process lithium battery separators.
·Chemical anti-corrosion: corrosion-resistant products such as pipes, fittings, seals, etc.
·Recycling and modification: UHMWPE granulation recycling of waste ultra-high molecular weight polyethylene, or preparation of high filling functional masterbatch.

Nanjing Kelongwell Chemical Machinery Co., Ltd. is well aware that the processing of ultra-high molecular weight polyethylene is not a one size fits all approach. We provide comprehensive OEM/ODM services:
·Customized screw combination: Design a dedicated twin screw extruder screw configuration based on your molecular weight range (1 million~9 million), filling ratio, and final product requirements.
·Modular barrel design: Side feeding, liquid injection port, multi-stage exhaust, etc. can be configured as needed to meet the requirements of different UHMWPE blending formulas.
·Whole line turnkey solution: one-stop supply from core UHMWPE extruder to upstream and downstream supporting facilities (automatic batching, cooling, drying, granulation, packaging).
·Automation customization: Provide customized control systems ranging from semi-automatic to Industry 4.0 intelligent factories according to factory requirements.

Q: Why can't ordinary plastic granulators be used to process ultra-high molecular weight polyethylene?
A: Ordinary plastic granulation lines are designed for polymers with a certain melt flow index. Ultra high molecular weight polyethylene has an extremely high molecular weight and hardly flows under conventional shear conditions. Using a regular extruder is prone to feeding failure, screw locking, or severe material degradation. Our UHMWPE extruder adopts a twin screw extruder structure, combined with forced feeding and low-temperature low shear design, fundamentally solving the rheological problem of ultra-high molecular weight polyethylene.

Q: What is the maximum molecular weight material that your UHMWPE extruder can process?
A: Our parallel twin screw extruder can stably process ultra-high molecular weight polyethylene with a molecular weight of 1 million to 9 million. When carrying out UHMWPE granulation, we will optimize the screw combination for different molecular weights to ensure that the ultra long molecular chain structure is maximally retained during the processing, and the excellent mechanical properties of the material are maintained.

Q: What is the difference between water ring cutting and strip cutting for UHMWPE granulation? How to choose?
A: The choice of UHMWPE granulation method mainly depends on the filling ratio and downstream processes. Strip cutting is suitable for high filling formulas (such as calcium carbonate ≥ 30%), easy to clean and with regular particles; Water ring hot cutting is more suitable for pure materials or low filling formulas, which can avoid oxidation and produce spherical particles, which is more conducive to subsequent molding. We will configure the most suitable cutting method according to your specific needs.

Q: How to prevent the degradation of ultra-high molecular weight polyethylene during processing?
A: Our twin screw extruder effectively prevents degradation through three measures: ① high torque and low-speed operation, significantly reducing frictional heat generation; ② Accurate zone temperature control, combined with an efficient oil cooling system, ensures that materials are always within the low-temperature process window; ③ Optimize screw design to shorten the residence time of materials in the barrel. These technologies ensure that the material does not turn yellow or degrade during the UHMWPE extrusion or UHMWPE granulation process.

Q: Can you provide the entire production line from raw material transportation to finished product packaging?
A: Sure. Nanjing Kelongwell Chemical Machinery Co., Ltd. provides a complete turnkey solution. We not only provide core UHMWPE extruders, but also include automatic batching systems, high-speed mixers, cooling water tanks, drying systems, pelletizers, and automatic packaging equipment. Whether you need a UHMWPE granulation production line or a sheet or profile extrusion production line, we can serve as a single supplier to provide you with a complete set of equipment and process support.