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Counter Rotating Twin Screw Extruder for Pipe Grade Masterbatch Making

– Kerke Extrusion Equipment –

Introduction to Pipe Grade Masterbatch

Pipe grade masterbatches represent specialized formulations designed to enhance the properties and processing characteristics of polymer pipes across diverse applications. These advanced masterbatches incorporate processing aids, thermal stabilizers, pressure resistance enhancers, and environmental stress cracking resistance compounds that improve pipe extrusion performance, long-term durability, and service life. The production of pipe grade masterbatches requires processing equipment capable of maintaining additive functionality while achieving uniform dispersion and precise granulation characteristics.

Counter rotating twin screw extruders provide the advanced processing capabilities necessary for pipe grade masterbatch manufacturing. These machines offer high shear mixing characteristics, excellent dispersive capabilities, and superior pressure resistance essential for incorporating pipe additives effectively. Nanjing Kerke Extrusion Equipment Company KTE Series counter rotating twin screw extruders represent advanced equipment designed specifically for demanding pipe grade masterbatch applications requiring exceptional consistency and performance.

Understanding Pipe Grade Additive Requirements

Pipe applications demand masterbatches with specific characteristics including excellent dispersion, high thermal stability, and consistent additive distribution. Processing aids improve melt flow during pipe extrusion, reducing energy consumption and improving dimensional control. Thermal stabilizers protect against thermal degradation during pipe processing and long-term service. Pressure resistance enhancers improve pipe burst pressure and long-term performance under internal pressure.

Environmental stress cracking resistance compounds prevent crack formation and propagation under stress and environmental exposure. These additives modify polymer structure to resist crack initiation and growth. Pipe grade masterbatches must maintain additive functionality while achieving excellent dispersion that prevents weak points and ensures consistent pipe properties.

Processing Aid Chemistry

Processing aids function by reducing polymer melt viscosity and improving flow characteristics during pipe extrusion. Fluoropolymer processing aids including PTFE and FEP demonstrate excellent lubricating effects and thermal stability. These materials coat metal surfaces and polymer melt, reducing friction and improving flow.

Polyethylene wax processing aids provide cost-effective flow improvement with good compatibility. Ester-based processing aids offer thermal stability and effectiveness at elevated temperatures. Processing aid selection depends on polymer type, processing conditions, and required flow improvement. Proper processing aid loading ensures optimal extrusion performance without affecting pipe properties.

Thermal Stabilizer Systems

Thermal stabilizers protect polymers during pipe processing and long-term service at elevated temperatures. Pipe processing temperatures often exceed standard conditions, requiring enhanced stabilization. High-temperature stabilizers including hindered phenols, phosphites, and specialized antioxidant systems provide comprehensive thermal protection.

Long-term pipe service demands stabilizers with low volatility and permanence. Stabilizer systems must withstand extended exposure to elevated temperatures without significant depletion. The combination of primary and secondary antioxidants provides comprehensive thermal protection for pipe applications. Stabilizer loading must balance processing protection with long-term service requirements.

Formulation Design for Pipe Grade Masterbatches

Effective pipe grade masterbatch formulations require careful balance of processing aids, thermal stabilizers, pressure resistance enhancers, and base polymers. Formulation ratios depend on pipe type, processing conditions, and performance requirements. Typical pipe grade masterbatch concentration levels range from 8% to 30% active ingredient loading, with most applications utilizing 12% to 24% additive content.

Base Polymer Selection

The base polymer serves as carrier for pipe additives and significantly influences formulation effectiveness. The base polymer should demonstrate excellent thermal stability, compatibility with additive systems, and appropriate rheological characteristics for pipe extrusion. Common base polymers for pipe grade masterbatches include polyolefins, polyvinyl chloride, and specialty pipe resins.

Polyolefin bases including HDPE and MDPE provide excellent thermal stability and compatibility with pipe additives. PVC bases require careful additive selection to maintain thermal stability and processing characteristics. Specialty pipe bases demand specialized formulations for demanding applications. Base polymer typically constitutes 70% to 92% of masterbatch formulation depending on additive loading.

Pipe Additive System Configuration

Pipe additive systems typically combine processing aids, thermal stabilizers, and pressure resistance enhancers for comprehensive performance enhancement. Processing aid loading typically ranges from 2% to 8% of masterbatch formulation depending on required flow improvement and processing conditions. Thermal stabilizer loading typically ranges from 5% to 12% depending on processing temperatures and service requirements.

Pressure resistance enhancer loading may range from 3% to 10% for improving pipe burst pressure and long-term performance. Additive ratios must be optimized for synergistic effects, as some combinations demonstrate enhanced pipe performance while others show antagonistic interactions. Processing aids improve extrusion performance while thermal stabilizers provide long-term protection.

Processing Aids and Compatibilizers

Processing aids and modifiers improve pipe grade masterbatch processability and enhance additive dispersion. Compatibilizers promote uniform distribution of pressure resistance enhancers throughout the polymer matrix. Lubricants reduce melt viscosity and improve flow characteristics, enabling processing with high additive loading. Coupling agents enhance compatibility between pipe additives and polymer base.

Processing aids typically constitute 2% to 6% of formulation depending on additive loading and dispersion requirements. Compatibilizer selection considers additive surface characteristics and polymer type. Lubricant selection considers polymer compatibility and processing temperature requirements. Well-designed processing aid systems ensure consistent processing and uniform additive distribution critical for pipe performance.

Counter Rotating Twin Screw Extruder Technology

Counter rotating twin screw extruders represent advanced compounding equipment with capabilities specifically suited for pipe grade masterbatch production. These machines incorporate high shear mixing, excellent dispersive capabilities, and robust construction designed to maintain additive functionality while producing consistent product. Nanjing Kerke Extrusion Equipment Company KTE Series counter rotating twin screw extruders provide the processing capabilities necessary for demanding pipe grade masterbatch applications.

High Shear Mixing Characteristics

Pipe grade masterbatch production requires high shear mixing to achieve excellent dispersion of solid additives. Counter rotating extruders feature screw configurations that generate intense shear forces for effective particle deagglomeration and uniform distribution. The counter-rotating motion creates calendering action that provides excellent dispersive mixing.

High shear mixing zones incorporate closely spaced kneading blocks that generate intense dispersive forces. The calendering effect between counter-rotating screws provides additional dispersive energy. Shear intensity can be adjusted through screw configuration and operating parameters. High shear mixing ensures excellent additive dispersion critical for pipe performance.

Excellent Dispersive Capabilities

Excellent dispersive capabilities are critical for pipe grade masterbatches to prevent weak points and ensure consistent pipe properties. Counter rotating extruders provide superior dispersive mixing through optimized screw designs and residence time distribution. Multiple high-shear mixing zones ensure complete deagglomeration of solid additives and uniform distribution.

Modular screw designs enable customization of dispersive intensity for different additive types and loading levels. Kneading block configurations provide optimal dispersive energy for particle deagglomeration. Residence time distribution ensures adequate dispersive mixing without over-processing. Excellent dispersive capabilities ensure consistent pipe quality and performance.

Robust Construction Design

Pipe grade masterbatch production requires robust equipment capable of withstanding high processing pressures and mechanical stress. Counter rotating extruders feature reinforced construction, strengthened shafts, and heavy-duty bearings designed for demanding operation. Robust construction ensures reliable operation under processing pressures.

Reinforced barrel sections incorporate thicker walls and enhanced support to withstand processing pressures. Strengthened shafts handle increased torque and shear forces without deflection. Heavy-duty bearings provide extended service life under high load conditions. Robust construction ensures equipment durability and consistent performance during pipe grade masterbatch production.

Production Process Overview

The production of pipe grade masterbatches using counter rotating twin screw extruders involves sequential processing stages including material preparation, feeding, melting, mixing, and granulation. Each stage requires precise parameter control to achieve optimal additive dispersion while maintaining pipe additive functionality and product consistency.

Material Preparation and Handling

Material preparation for pipe grade masterbatch production requires attention to additive handling, moisture control, and particle size distribution. Processing aids and thermal stabilizers often require protection from moisture during storage to maintain functionality. Some additives may agglomerate if not properly handled.

Pre-mixing of pipe additives with polymer base using high-intensity mixers can improve initial distribution and reduce processing requirements. Dry blending eliminates concentration gradients and reduces residence time demands in the extruder. Pre-mixing protocols must ensure adequate mixing without generating excessive heat that could degrade sensitive additives. Proper material preparation ensures consistent additive functionality.

Precision Feeding Systems

Feeding accuracy is critical for maintaining consistent pipe additive concentrations and product performance. Counter rotating extruders typically utilize gravimetric feeders for major components and precision metering devices for high-value additives. Feeding accuracy within 0.5% is essential for maintaining consistent formulation ratios.

Gravimetric feeders provide continuous weight-based feeding with automatic compensation for material density variations. Loss-in-weight feeders offer the highest accuracy for additive introduction. Multiple feeding points enable introduction of temperature-sensitive additives at downstream locations. Feeding system consistency ensures product quality and performance consistency.

Melting and Plasticization

The melting zone achieves polymer transition from solid to molten state capable of incorporating pipe additives. Temperature profiles in this zone must achieve complete melting while protecting sensitive additives from thermal degradation. Typical temperature settings for polyolefin-based pipe grade masterbatches range from 175 to 195 degrees Celsius for initial barrel zones.

Barrel design and screw configuration in the melting zone emphasize efficient melting to achieve adequate viscosity for high shear mixing. Barrier screw designs can enhance melting efficiency while reducing residence time. Proper melting establishes foundation for subsequent dispersive mixing stages and significantly influences energy consumption.

High Shear Mixing and Dispersion

The mixing zone ensures uniform distribution of pipe additives throughout the polymer matrix through high shear forces. Temperature in this zone must balance mixing requirements with additive thermal protection. Typical mixing zone temperatures range from 190 to 210 degrees Celsius for most polyolefin formulations.

Screw configuration in the mixing zone incorporates closely spaced kneading blocks designed for optimal dispersive mixing through high shear forces. Counter-rotating screw motion provides calendering action that enhances dispersive capabilities. Mixing intensity must achieve complete additive deagglomeration and uniform distribution without excessive thermal degradation.

Processing Parameters and Optimization

Processing parameters for pipe grade masterbatch production must optimize additive dispersion and functionality while achieving consistent product quality. Temperature profile, screw speed, throughput, and pressure conditions all influence product quality and process efficiency.

Temperature Profile Configuration

Temperature profile configuration requires careful consideration of polymer thermal characteristics, additive thermal stability, and dispersion requirements. Typical temperature profiles for polyolefin pipe grade masterbatches start at 175-190 degrees Celsius in feed zones, increase to 190-205 degrees Celsius in mixing zones, and maintain 195-215 degrees Celsius through die zones.

Additive thermal stability dictates maximum temperature limits. Some processing aids begin degrading above 230 degrees Celsius. Thermal stabilizers generally demonstrate good thermal stability but may decompose at extreme temperatures. Temperature profile optimization should include testing of additive functionality after processing at various temperature settings.

Screw Speed and Throughput Optimization

Screw speed and throughput must be balanced to achieve optimal dispersive mixing while protecting additive functionality. Counter rotating extruders for pipe grade masterbatch production typically operate at screw speeds from 100 to 220 rpm depending on screw size and formulation complexity. Higher screw speeds increase shear intensity but reduce residence time.

Throughput rates typically range from 150 to 1100 kg/hr depending on machine size and formulation complexity. The throughput-to-speed ratio significantly influences residence time and dispersive mixing quality. Optimal feed rates for pipe grade masterbatches typically fall between 5 and 12 kg/hr per cm of screw diameter.

Pressure and Shear Control

Pressure and shear control ensures adequate dispersive mixing while managing energy consumption and additive protection. Processing pressure must be sufficient for dispersive mixing but not excessive to cause overheating. Shear intensity can be adjusted through screw configuration and operating parameters.

Screw configuration optimization balances dispersive mixing requirements with energy efficiency. Pressure monitoring enables real-time process adjustment and optimization. Shear control ensures adequate dispersion while protecting additive functionality. Pressure management optimizes energy consumption and product quality.

Equipment Investment and Cost Analysis

Investment in counter rotating twin screw extruders for pipe grade masterbatch production represents significant capital expenditure requiring careful cost-benefit analysis. Understanding cost structure enables informed equipment selection.

Capital Investment Requirements

Counter rotating twin screw extruders for pipe grade masterbatch production typically range in price from 165,000 to 480,000 US dollars depending on screw size, shear capacity, and configuration. Medium to large counter rotating extruders with 60-90mm screw diameters for capacities 300-1100 kg/hr typically cost 260,000 to 480,000 US dollars.

Configuration options significantly influence pricing. High shear mixing systems and reinforced construction add 25-35% to base machine cost. Precision temperature control systems with multiple zones add 15-25% to base machine cost. Advanced granulation systems and pressure monitoring add 15-25% to base cost.

Operating Cost Considerations

Operating costs include energy consumption, labor, maintenance, and materials. Energy consumption for counter rotating extruders typically ranges from 0.14 to 0.26 kWh per kg of product depending on machine size and formulation complexity. Counter rotating equipment may demonstrate higher energy consumption due to high shear mixing but provides superior dispersive capabilities.

Labor requirements vary based on automation level, with process monitoring requiring attention to pressure and shear parameters. Maintenance costs typically represent 3-5% of initial investment annually when proper preventive maintenance is followed. Material costs represent the largest operating expense, with thermal stabilizers and processing aids often accounting for 50-75% of material cost depending on formulation complexity.

Production Challenges and Solutions

Pipe grade masterbatch production encounters specific challenges related to additive sensitivity, dispersion quality, and pipe performance. Understanding these challenges enables effective problem resolution.

Processing Aid Degradation

Problem: Processing aid degradation manifests as reduced flow improvement, increased melt viscosity, or processing difficulties during pipe extrusion. Degraded processing aids lose functionality, significantly compromising pipe processing performance.

Cause Analysis: Excessive processing temperatures, prolonged residence time at elevated temperatures, thermal hot spots in the barrel, or poor temperature control can cause processing aid degradation. Some processing aids begin degrading above 230 degrees Celsius. Thermal hot spots from improper heating or blocked cooling channels create localized overheating. Poor temperature distribution causes exposure to high temperatures for some material portions.

Solution and Prevention: Optimize temperature profile to minimize thermal exposure, particularly for temperature-sensitive processing aids. Ensure adequate cooling capacity and maintain cooling channel integrity. Implement uniform heating and eliminate hot spots. Reduce residence time through optimized screw configuration and throughput rates. Use thermally stable processing aid alternatives when necessary. Implement temperature monitoring with alarms to detect overheating.

Poor Additive Dispersion

Problem: Poor additive dispersion results in inconsistent pipe properties, weak points, or performance variations. Non-uniform dispersion compromises pipe integrity and creates failure points under pressure.

Cause Analysis: Inadequate shear mixing, inappropriate screw configuration, excessive throughput rates, or additive particle characteristics can cause poor dispersion. High additive loading increases dispersion difficulties. Insufficient residence time prevents complete deagglomeration. Poor pre-mixing leads to concentration gradients. Inadequate shear intensity prevents adequate particle deagglomeration.

Solution and Prevention: Optimize screw configuration by adding closely spaced kneading blocks for high shear mixing. Reduce throughput rates to increase residence time and dispersive mixing intensity. Ensure adequate pre-mixing to eliminate concentration gradients. Utilize appropriate shear intensity for additive deagglomeration. Optimize additive particle size for processing conditions. Regular screw maintenance ensures consistent mixing performance.

Thermal Stabilizer Depletion

Problem: Thermal stabilizer depletion manifests as reduced thermal protection, discoloration, or premature degradation during pipe processing or service. Depleted stabilizers cannot protect polymer adequately, significantly compromising pipe performance.

Cause Analysis: Excessive processing temperatures, inadequate stabilizer loading, or extended service depletes thermal stabilizers. Stabilizer depletion may occur during processing or over extended pipe service. Volatility losses reduce stabilizer content over time. Inadequate stabilizer selection for service conditions leads to premature depletion.

Solution and Prevention: Optimize temperature profile to minimize stabilizer consumption during processing. Ensure adequate stabilizer loading for both processing protection and service life. Select stabilizers with low volatility for long-term service. Consider additional stabilizer for extended service requirements. Test stabilizer depletion characteristics during formulation development.

Granulation Quality Issues

Problem: Granulation quality issues manifest as inconsistent pellet size, shape irregularities, or density variations. Poor granulation quality affects handling, dosing accuracy, and dispersion during pipe processing.

Cause Analysis: Pelletizer maintenance issues, improper cutting blade alignment, inconsistent strand diameter, or variable melt properties cause granulation variations. Worn cutting blades or improper blade speed cause size variations. Inconsistent cooling or melt properties cause shape irregularities. Pelletizer feed rate variations cause overfilling or underfilling of cutting chamber.

Solution and Prevention: Maintain pelletizer cutting blades with regular replacement or sharpening. Ensure proper blade alignment and clearance. Maintain consistent strand diameter through process control. Monitor and control melt properties including temperature and viscosity. Optimize pelletizer feed rate for consistent filling. Implement automated pellet size monitoring and adjustment for consistent quality.

Maintenance and Equipment Optimization

Regular maintenance ensures consistent performance of counter rotating twin screw extruders and extends equipment life. Preventive maintenance programs must address shear systems, mixing components, granulation equipment, and auxiliary systems.

Shear Mixing System Maintenance

Shear mixing system maintenance includes regular inspection of kneading blocks, verification of screw alignment, and examination of wear patterns. High shear mixing zones experience increased wear and require regular inspection. Screw alignment verification ensures proper counter-rotating action and dispersive efficiency.

Kneading block inspection identifies wear requiring replacement to maintain dispersive mixing intensity. Screw element clearances must be measured to ensure proper clearances. Regular shear mixing system maintenance ensures consistent dispersive performance essential for pipe grade masterbatch quality.

Screw and Barrel Maintenance

Screw and barrel maintenance includes regular inspection of wear patterns, clearance measurements, and cleaning to remove additive deposits. Pipe additives can leave residues that accumulate on screw elements and barrel surfaces. Regular cleaning prevents accumulation that could affect product quality or processing performance.

Clearance measurements track wear rates and predict when screw element or barrel replacement is necessary. Precise clearances are essential for dispersive mixing and process consistency. Worn screw elements should be replaced to maintain mixing quality. Barrel wear liners may require replacement after extended operation. Regular screw and barrel maintenance ensures consistent processing and product quality.

Granulation System Maintenance

Granulation system maintenance includes regular inspection of cutting blades, alignment verification, and examination of pellet quality. Cutting blade sharpness directly affects pellet quality and consistency. Blade alignment and clearance must be maintained for proper cutting action. Pellet quality inspection identifies developing problems before they cause significant quality issues.

Water ring pelletizers require maintenance of water systems including pumps, filtration, and temperature control. Strand pelletizers require maintenance of haul-off speed control and cutting chamber consistency. Die face pelletizers require maintenance of knife and die condition. Granulation system maintenance ensures consistent pellet quality essential for masterbatch handling and pipe processing.

Quality Assurance and Testing

Comprehensive quality assurance protocols are essential for ensuring pipe grade masterbatch performance and batch consistency. Testing should evaluate additive dispersion, thermal stability, and pipe performance characteristics.

Pipe Processing Testing

Pipe processing testing evaluates masterbatch effectiveness by processing pipe samples under standard conditions and measuring processing characteristics and pipe quality. Samples are processed on pipe extrusion lines with controlled parameters. Melt pressure, extrusion torque, and pipe dimensional stability quantify processing performance.

Pipe processing testing should be conducted on equipment relevant to actual production conditions. Testing at various processing speeds and temperatures identifies performance across operating ranges. Comparison to standard formulations quantifies performance improvement. Performance verification ensures masterbatch meets pipe processing requirements.

Thermal Aging Testing

Thermal aging testing evaluates masterbatch thermal protection by aging samples at elevated temperatures and monitoring property changes. Samples are aged in ovens at controlled temperatures for specified periods. Tensile strength retention, elongation, and color changes quantify thermal protection effectiveness.

Thermal aging testing should be conducted at temperatures relevant to pipe processing and service conditions. Extended aging times simulate long-term thermal exposure. Comparison to unprotected polymer samples quantifies protection effectiveness. Performance verification ensures masterbatch meets thermal stability requirements.

Frequently Asked Questions

This section addresses common questions regarding pipe grade masterbatch production using counter rotating twin screw extruders.

What is the optimal processing aid loading for pipe grade masterbatches?

Optimal processing aid loading depends on polymer type, processing conditions, and flow improvement requirements. Typical pipe grade masterbatch processing aid loading ranges from 2% to 8% depending on formulation complexity. Higher loading provides greater flow improvement but increases cost and may affect pipe properties. Lower loading may provide insufficient flow improvement for high-speed pipe processing. Loading optimization requires evaluation of actual processing conditions and flow requirements.

Why is counter rotating screw configuration preferred for pipe grade masterbatch production?

Counter rotating screw configuration provides high shear mixing characteristics essential for excellent additive dispersion in pipe grade masterbatches. The calendering action between counter-rotating screws provides intense dispersive mixing forces. Excellent dispersive capabilities ensure uniform additive distribution that prevents weak points and ensures consistent pipe properties. Robust construction withstands high processing pressures required for pipe grade formulations.

What processing parameters most significantly affect pipe grade masterbatch quality?

Processing parameters significantly affecting quality include shear mixing intensity for additive dispersion, temperature profile for additive protection, and residence time for adequate deagglomeration. Screw speed and throughput determine shear rate and residence time affecting both dispersion quality and additive stability. Temperature profile must balance thermal requirements for processing with additive thermal protection. Screw configuration optimization addresses specific dispersion requirements while protecting additive functionality.

How can additive dispersion be improved in pipe grade masterbatches?

Additive dispersion improvement requires optimization of shear mixing conditions, screw configuration, and processing parameters. Screw configuration with closely spaced kneading blocks provides high shear dispersive energy for particle deagglomeration. Reduced throughput rates increase residence time and dispersive mixing intensity. Pre-mixing eliminates concentration gradients. Optimize additive particle size for processing conditions. Regular screw maintenance ensures consistent mixing performance.

What quality tests verify pipe grade masterbatch effectiveness?

Quality verification should include pipe processing testing, thermal aging testing, and visual inspection for dispersion quality. Pipe processing testing measures flow improvement and processing performance under actual conditions. Thermal aging testing evaluates thermal protection effectiveness. Visual inspection identifies agglomerates or dispersion problems. Additional tests may include burst pressure testing, mechanical property retention, and pellet quality assessment. Comprehensive testing ensures masterbatch meets pipe performance requirements.

How does shear mixing intensity affect pipe grade masterbatch quality?

Shear mixing intensity significantly affects additive dispersion and pipe grade masterbatch quality. Higher shear mixing provides more effective particle deagglomeration and uniform additive distribution. However, excessive shear may degrade sensitive additives or cause thermal degradation. Optimal shear intensity balances dispersion requirements with additive protection. Shear intensity adjustment through screw configuration and operating parameters enables optimization for specific formulations.

Conclusion and Best Practices

Pipe grade masterbatch production using counter rotating twin screw extruders requires attention to formulation design, processing parameters, equipment capabilities, and quality assurance. The interplay between processing aid chemistry, thermal stabilizer systems, processing conditions, and dispersive mixing capabilities determines final product performance and consistency.

Formulation optimization should begin with understanding pipe processing requirements and additive functionality. Additive systems must address specific processing and service requirements for different pipe types. Processing aids improve extrusion performance while thermal stabilizers provide long-term protection. Formulation development should include pipe processing testing to verify performance.

Equipment selection must address high shear mixing requirements for excellent dispersion and robust construction for processing pressures. Counter rotating twin screw extruders with high shear mixing systems, reinforced construction, and consistent granulation provide necessary capabilities. Equipment investment should consider production volume requirements, dispersion quality standards, and processing pressure expectations.

Processing parameter optimization balances dispersion requirements with additive protection. Temperature profiles achieve adequate melting and mixing while maintaining additive functionality. Screw speed and throughput optimize residence time and dispersive mixing intensity. Pressure control ensures adequate mixing while managing energy consumption. Systematic parameter optimization through experimentation and testing establishes optimal conditions.

Quality assurance protocols should include comprehensive testing for additive dispersion, thermal stability, and pipe performance. Pipe processing testing provides performance verification under actual processing conditions. Thermal aging testing evaluates long-term thermal protection. Regular quality monitoring ensures batch-to-batch consistency.

Preventive maintenance programs maintain equipment performance and extend service life. Regular maintenance of shear mixing systems ensures consistent dispersive performance. Screw and barrel maintenance maintains mixing performance and product quality. Granulation system maintenance ensures consistent pellet quality. Maintenance protocols prevent unexpected downtime and quality problems.

Pipe grade masterbatch production combines advanced additive chemistry, high shear mixing equipment, and comprehensive quality systems. Success requires integration of formulation expertise, processing knowledge, and quality assurance capabilities. The counter rotating twin screw extruder provides essential capabilities for producing consistent, high-performance pipe grade masterbatches that enhance processing performance and pipe durability across diverse applications.

Production System

We have a total of ten systems for the production of plastic masterbatch, including different cooling forms such as air cooling and water cooling, which can be used for filling, blending, and reinforcing plastic masterbatch.

Kerke Factory

JS Kerke Extrusion Equipment Co.,Ltd, a professional manufacturer specializedin designing and producing modular co-rotating parallel twin screw pelletizing line as well as its key parts, devotes itself for many years into researching and manufacturing plastic processing machinery. lts main product contains KTE series twin screw extruder with high torque, high speed and high production. KTE/SE series double stage twin/single compound pelletizing line, and SE series single screw extruder for waste film recycling.

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