Laboratory Parallel Twin-Screw Extruder

Laboratory Parallel Twin-Screw Extruder

Skip to product information
Laboratory Parallel Twin-Screw Extruder
  • Laboratory Parallel Twin-Screw Extruder
Laboratory Parallel Twin-Screw Extruder
SKU:

Laboratory Parallel Twin-Screw Extruder

Get personalized pricing for your specific requirements

Laboratory Parallel Twin-Screw Extruder QualiPTSE™ 21

The QualiPTSE™ 21 Parallel Twin-Screw Extruder is a high-performance laboratory extrusion system designed for polymer compounding, formulation development, material modification, and small-batch production. Its modular configuration, precise process control, and scalable design make it well suited for research institutions, polymer R&D laboratories, universities, and quality control facilities.

This laboratory twin-screw extruder enables researchers to evaluate the effects of fillers, additives, and processing conditions on important polymer properties, including mechanical strength, thermal resistance, and flame retardancy. It also supports the development of customized polymer blends and the evaluation of new resin formulations under controlled processing conditions.

Key Applications

  • Plastic compounding and polymer modification

  • Filler reinforcement and additive dispersion

  • Flame-retardant polymer development

  • High-temperature polymer formulation

  • Experimental resin formulation

  • Specialty polymer development

  • Small-batch polymer production

  • Academic research and laboratory testing

  • Pilot-scale process evaluation

With its compact structure and adjustable processing parameters, the QualiPTSE™ 21 creates a controlled laboratory environment for evaluating new polymer formulations, optimizing extrusion conditions, and preparing processes for larger-scale production.

Why Choose the QualiPTSE™ 21?

  • Precise Process Control: Accurate adjustment of key processing parameters helps achieve consistent and repeatable test results.

  • Flexible Laboratory Processing: Suitable for formulation trials, material development, and small-batch production.

  • Adjustable Parameters: Processing conditions can be configured for different polymer materials and formulations.

  • Efficient Heating System: High-performance heating provides controlled thermal conditions during extrusion.

  • Safety and Control Features: Integrated operating and safety functions support dependable laboratory operation.

  • Modular Configuration: Flexible system design allows the extrusion setup to accommodate different research and development requirements.

Whether you are developing new polymer materials, evaluating additives, optimizing formulations, or producing specialty polymer batches, the QualiPTSE™ 21 Parallel Twin-Screw Extruder provides precise processing control, flexibility, and reliable performance for laboratory polymer research and development.

Starve-Fed Conveying & Thermo-Mechanical Plasticating

The QualiPTSE™ 21 Parallel Twin-Screw Extruder uses starve-fed conveying and multi-zone temperature control to provide consistent polymer processing. A screw metering feeder introduces polymer granules into the 20 mm screw channels at controlled feed rates, helping maintain stable material transport throughout the barrel instead of continuously filling the conveying section.

C-Shaped Chamber Transport

Material transport occurs through modular C-shaped chambers created by the rotating screw elements. These chambers support partially filled conditions in starve-fed conveying zones and fully filled conditions in melt-pumping sections across the extended 40:1 L/D ratio.

Self-Wiping Feed Geometry

The feed section maintains the actual self-wiping screw-channel geometry used for solids conveying. This configuration supports accurate evaluation of heat transfer and shear conditions at the barrel interface while maintaining effective material movement through the processing zone.

Multi-Zone Thermal Control

During co-rotating twin-screw extrusion, early barrel sections may require heating, while downstream areas can require cooling as mechanical shear generates additional heat within the polymer melt. The QualiPTSE™ 21 uses a 6-zone electric heating system, Type K thermocouples, and an RKC temperature controller to provide precise thermal management.

The system maintains temperature accuracy of ±0.5°C up to 350°C, with temperatures up to 500°C available with high-temperature upgrades.

Computational Flow & Devolatilization Simulation

Understanding polymer melt behavior inside an intermeshing twin-screw extruder requires analysis of non-Newtonian flow, shear gradients, temperature variations, and material residence conditions. For the QualiPTSE™ 21, these principles support screw-element configuration across a screw speed range of 1–200 rpm, including processing zones used for kneading, mixing, and degassing.

3D Kneading Block Flow Analysis

Three-dimensional CFD modeling of kneading blocks can account for the detailed geometry of the screw flights and the complex flow patterns generated between intermeshing screw elements. This includes cross-channel leakage flow that may not be fully represented by simplified continuous-flight models.

Devolatilization Surface Area Analysis

Finite element modeling using a 2.5D Hele-Shaw approach can evaluate melt fill levels and exposed melt surface area within starved barrel sections. This analysis provides a basis for understanding volatile removal and optimizing degassing performance through the integrated vacuum exhaust system.

Together, the conveying, thermal-control, flow-analysis, and devolatilization capabilities of the QualiPTSE™ 21 Parallel Twin-Screw Extruder provide a controlled platform for polymer compounding, process development, material formulation, and laboratory-scale extrusion research.

Relevant Simulation Approaches for Twin-Screw Extrusion

Simulation Setup Core Features Process Application & Validation
2.5D Hele-Shaw / FEM Estimates fill profiles and devolatilization surface area in starved zones Tested with Toluene in Polypropylene, achieving a low 6.5% margin of error.
3D CFD (Impulse Transmission) Models screw motion via fluid velocity vectors without dynamic mesh distortion Calibrated on physical test rigs following ICH Q2 standards
2.5D Flow Analysis Network Computes axial and circumferential flow velocity profiles Verified against high-density polyethylene experimental pressure data

Viscous Dissipation & Pressure Characterization

Effective thermal management during polymer compounding requires careful control of mechanical energy, viscous heating, and barrel cooling. The QualiPTSE™ 21 Parallel Twin-Screw Extruder supports operating pressures of up to 0–100 MPa and combines 6.4 kW heating capacity with compressed-air cooling to regulate thermal conditions during polymer processing.

Energy Dissipation Analysis

During polymer plasticating, the total mechanical energy introduced into the material can be associated with several forms of energy dissipation, including friction between polymer pellets and surfaces, plastic deformation, and viscous shear heating. Evaluating these energy contributions within kneading sections helps researchers understand thermal behavior and reduce the risk of excessive heat exposure to temperature-sensitive additives.

Pawlowski Element Characterization

The screw elements can be evaluated using pressure coefficients (A1, A2) and torque coefficients (B1, B2) derived from experimental test-bench data. These parameters provide useful information for analyzing screw-element performance and supporting screw configuration optimization across 1,536 geometric design points.

AI-Assisted Parameter Selection

AI-based modeling can assist with the selection of key extrusion parameters by analyzing simulated twin-screw flow behavior. Depending on the application, these models can help identify suitable screw speeds, feed rates, and barrel temperatures for targeted polymer processing results, reducing the amount of trial-and-error testing required during formulation development.

Scale-Up & Residence Time Distribution (RTD)

The QualiPTSE™ 21, with an output capacity of 1–15 kg/h, can be used as a standalone laboratory extruder or integrated with torque rheometer systems to generate process data for polymer development and industrial scale-up.

Mechanistic Scale-Up Models

Mechanistic finite-volume models can incorporate non-isothermal rheology and detailed material chemistry to support formulation transfer from a 20 mm, 40:1 L/D laboratory extruder toward larger production systems, including 75 mm production extruders.

Residence Time Distribution (RTD) Modeling

Mechanistic Residence Time Distribution (RTD) models combined with backflow-cell methodology can characterize axial material dispersion and long-tail residence behavior associated with distributive mixing elements. This provides a more detailed representation of material residence characteristics than simplified continuous stirred-tank reactor assumptions.

True-Shape Feed Channels

Maintaining the actual self-wiping screw-channel geometry helps preserve the physical characteristics of the conveying section during process analysis. Accurate channel geometry supports more reliable calculations of heat transfer, material transport, and thermal behavior compared with simplified rectangular-channel representations.

The combination of pressure characterization, thermal analysis, screw-element evaluation, RTD modeling, and scale-up analysis makes the QualiPTSE™ 21 a versatile platform for laboratory polymer compounding, extrusion process development, and formulation research.

Laboratory Parallel Twin-Screw Extruder QualiPTSE™ 21 Technical Specifications

Specification Details
Screw Diameter 20 mm
Screw L/D Ratio 40:1
Screw Speed Range 1 – 200 rpm
Feeding Method Screw metering feeding
Heating Method 6-zone electric heating
Maximum Temperature 350°C (optional: 500°C)
Temperature Control System RKC temperature controller
Temperature Accuracy ±0.5°C
Heating Power 6.4 kW
Temperature Sensors Type K thermocouples
Output Capacity 1 – 15 kg/h
Pressure Range 0 – 100 MPa
Exhaust Method Vacuum exhaust
Cooling Method Compressed air cooling

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks. If you require these items urgently please contact us to check accurate stock availability and to organize faster shipping methods.

🚚

Important Delivery Information

Delivery time varies upon stock availability. Our standard dispatch and shipping times are generally within 1 week, however for some high demand items the delivery may be extended to 2-3 weeks.

Need it urgently? Contact us here to check stock and organize faster shipping.

Orders:
Purchaser acknowledges that when placing an order on the Qualitest:

A. the placing of the order signifies the purchaser's assent to place said order at the Qualitest and that the order will be accepted by the successful processing of the order by Qualitest USA LC.
B. the purchaser typing their name when requested to do so by the Qualitest constitutes a signature to contract
C. the purchaser has the full authority to enter into the contract for such entity, and such grant of authority was indicated by purchaser by placement of the order through the Qualitest.
D. A minimum handling fee will be applied to the shipping total for all orders.

Shipping within the U.S.A.:

All orders will be shipped best way prepaid, via courier for smaller packages or via Freight forwarders for larger crates. A handling fee may be applicable to orders. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims.

Shipping outside of the U.S.A.:

All orders will be shipped best way, via courier for smaller packages or via Freight forwarders for larger crates. A low handling fee may be applicable. Title to merchandise transfers to the purchaser upon delivery to the carrier. Loss or damage in transit is the responsibility of the purchaser. Qualitest USA will provide assistance with information needed for processing claims. Export fees, duties, taxes, and customs clearance are the responsibility of the purchaser.

Shipping insurance is not included, please contact our sales representatives if you need shipping insurance.

Partial shipment: Qualitest USA reserves the right to make partial shipments unless otherwise instructed by the purchaser.

Payment terms: All payments to Qualitest USA are to be made in U.S. Dollars (USD)

A. Credit Card - Qualitest USA will accept Visa, Master Card, AMEX or Discover. Required information from the purchaser is the credit card number, 3 digit security code, expiration date, card holder's name (exactly as it appears on the card), billing address, and valid telephone number for us to use in case of difficulty. Qualitest USA reserves the right to delay shipment pending verification of credit card validity.
B. Wire Transfer - Transfer must be made to Qualitest and confirmed for the full purchase amount (merchandise, handling and shipping) prior to shipment. Please contact us by phone at 1.877.884.TEST (8378)(outside U.S. +1.905.944.9825) or by fax at +1.954.697.8211 for bank information.
C. Open Account - Available to U.S.A. and Canadian customers only. Terms on open accounts are Net 30 days from date of shipment. Qualitest USA reserves the right to refuse shipment of new orders if any unpaid invoices are older than 30 days. Purchasers may apply for an open account by providing:

their bank information
3 credit references from other suppliers
Please allow 5 business days for confirmation of credit and creation of an open account.

Return Policy:

Qualitest USA may accept return of purchased merchandise within North America for refund or credit under the following conditions -

  • There may be an additional restocking fee charged to the transaction if items are already shipped to customer.
  • Goods must be returned to Qualitest USA within 5 days of the date of the receipt of the purchased goods.
  • All freight, duties, customs, and other related shipping charges for the returned merchandise are borne by the purchaser. Shipments made freight collect will be refused.
  • Merchandise must be returned properly packaged in brand new, salable condition, along with original packaging and all documentation, accessories and certificates.
  • Purchaser has confirmed return authorization directly with Qualitest.
  • Merchandise is regular catalog item. Special order items can not be returned.
  • All returned merchandise is subject to inspection by Qualitest. Qualitest reserves the right to refuse return of any merchandise that is used, damaged, or not part of the current published price list. In the case Qualitest does not accept the returned merchandise, reasonable attempts will be made to notify the Buyer and the merchandise will be returned to Buyer as they were received by Qualitest. Damaged merchandise that can be restored to original condition and thus accepted for return will be evaluated on an individual basis. The purchaser will be advised of additional expenses for the repair and restoration of the returned item. After approval, these expenses will be charged to the purchaser in addition to the restocking fee.


Change of Terms:

The acceptance of any order by Qualitest USA is subject to purchaser's assent to all of the terms and conditions set forth herein. Purchaser's assent to these terms and conditions shall be presumed from the purchaser's placement of an order through the Qualitest. Any and all other terms and conditions are expressly rejected, and no addition or modification of terms and conditions shall be binding without the prior agreement of Qualitest USA in writing.

Complete Agreement:

The terms and conditions in the Qualitest web site, incorporated herein by reference, including forms, acknowledgements, quotations, invoices and sales terms and conditions constitute the entire and exclusive agreement between the purchaser and Qualitest USA LC.

Information:

Qualitest USA makes every effort to insure the accuracy of the product information displayed on its web sites, but makes no warranties, expressed or implied, as to the accuracy of the data portrayed on the web sites. Qualitest USA reserves the right to change product information, including pricing information at any time without notice. 

Trademarks and Copyrights:

The WorldofTest.com Qualitest contains trademarked product names. Product names are not to be reproduced or used in any fashion by any party other than Qualitest without the express written consent of Qualitest International Inc.. All pictures, descriptions, and other content of this web site are copyrighted by Qualitest USA and may not be used without the express written permission of Qualitest USA. Purchaser acknowledges that they have no right, title, or interest in the trademarks or copyrights in the products, and purchaser covenants that it will take no action to register or otherwise interfere with such rights. Please contact us with any requests for permission or questions about our trademarks. 

Warranty Disclaimer:

No warranty or affirmation of fact, express or implied, other than expressly set forth herein is made or authorized by Qualitest USA. Qualitest USA disclaims any and all liability for product defect claims. Qualitest USA does not express or imply a warranty that any product on the web site(s) is fit for a particular purpose. Qualitest USA honors the product warranty as published and made available by Qualitest USA. Warranty claims for products not manufactured by Qualitest are the responsibility of the manufacturer. Qualitest USA will always make its best good faith effort to resolve warranty claims. 


Force Majeure:

Qualitest USA shall not be liable for any delay in or impairment of performance resulting in whole or in part from Acts of God, service interruptions, labor disruptions, insurrections, governmental decrees or controls, war risks, severe weather, supplies or raw materials, inability to procure or ship products, inability to obtain permits and/or licenses, or any other circumstances or causes beyond the control of Qualitest USA in the conduct of its business. 

Qualitest USA Privacy Policy 

I. What legal provisions govern our data processing practices? How and from where (internal/external sources) is personal data acquired? What are the rights of the user (web site visitor/registered customer)? 

1. General
As a general principle, no personal details need to be provided when visiting our Internet site. Data made available to us by you is treated in strict confidence and in accordance with the provisions of the Federal Data Protection Act. With a few exceptions (see point 2 below), our web server only registers non-personal (anonymous) data concerning the use of our site. Specifically, the log files of our web server, as a general rule, only contain the user's IP address, the last page visited by the user, the browser used, date, time and the file requested. This anonymous data, however, does not permit conclusions to be drawn about the individual users, and merely serves to prepare statistics on the use of our Internet site for the purpose of its improvement. At the same time, great importance is placed on ensuring that usage data is not linked with personal data. 

2. Personal data

Person-related data (personal data) is only used if the newsletter is ordered (by email), product(s) is (are) ordered, or to supply product information. We undertake to use the personal data entrusted to us only for the purposes stated. Purchase history is retained for assistance with future customer needs. 

II. What security measures are used to protect personal data? What are the user's options for processing personal data? 

3. Technical measures

Databases are optimally protected against third party access, loss, misuse and falsification through the use of appropriate technical means. In order to determine the popularity of individual topic areas, cookies are used in those sections. These text files are stored on your hard disk and facilitate your use of our Internet site. Thanks to these cookies, there is no need for specific registration each time you visit a section requiring registration, and we can supply you with the personalized contents you request. 

It is for you to decide whether you want to work with cookies and, if so, which kind (permanently stored on the hard disk or only placed for the time of the browser activity). However, we draw your attention to the fact that access to fields requiring registration is only possible with activated cookies. 

III. What data is communicated to third parties and for what purposes? 

4. Communication of personal data

Personal data entrusted to us by you is not communicated, leased or sold to third parties. 

IV. Which department answers questions about the processing of personal data? 

5. Contact

In the light of the rapid technical developments in connection with the Internet, we make every effort to constantly improve our Internet site and technical precautions, including those connected with data protection. We will keep you suitably informed about such measures. Any changes will be published here. Further information is available at any time by contacting Qualitest USA.

Disclaimer of liability Qualitest USA shall not be liable for direct, indirect or consequential losses resulting from or in connection with access to, use of or queries to the Qualitest web site or its links with other web sites, even if Qualitest USA has previously been informed of the possibility of such losses. No guarantee is provided as to the accuracy of the information disseminated via the Qualitest USA web site. In addition, Qualitest USA guarantees neither the reliability nor the completeness of the information contained on its web site. The information made available on the Qualitest and WorldofTest.com web site may be amended at any time without prior notice. In particular, Qualitest USA shall not be liable for losses caused by transmission errors, technical faults and interruptions, breakdowns or an unlawful interference with the user's data processing system or the generally accessible systems and transmission networks. Nor shall Qualitest USA be liable for losses resulting from breakdowns, interruptions or overloads occurring to any data processing systems. If certain links are activated on the Qualitest and WorldofTest.com web site, the user may under certain circumstances leave the Qualitest web site. Qualitest USA assumes no responsibility for the contents, products or services offered or other information or offers contained on these linked web sites. 

Related Products