Multi-Resin Dryerless Systems
PTi has provided the most twin screw dryless systems in North America. As we listen to our clients needs, we have developed and provided the latest state of the art proven PTi model SGTSE MultiRESN™. Improvements have been implemented over time to meet industry demands and processing capabilities. Originally established and operating as a 90mm 50/LD, 430 hp oil cooled, co-rotating twin screw in PTi's Technology Development Center (TDC), the SGTSE MultiRESN™ has proven to be unwavering in power and versatility. Maintaining the premise of fully intermeshing co-rotating, self-wiping screws, with high vacuum venting for the elimination of the crystallizing and drying processes, the SGTSE MultiRESN™ outperforms other twin-screw technology in terms of operating performance, energy efficiency, and sustainable utilization of resources.
Features
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Up to 35% energy savings compared to conventional processes
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Processes up to 100% of PET and PLA flake at moisture levels up to 12000 ppm
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Advanced co-rotating screw design reduces carbon build-up, improves torque capabilities and simplifies future screw element replacement.
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Able to run multiple resins on the same feed screw arrangement (i.e.; PET, PLA, PP, PS and PE)
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IV monitoring system provides real time feedback
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Cast bronze and aluminum barrel heaters provide higher heater densities (20+%) for greater energy efficiency and component life vs band style heaters
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Patented M-ATEX™ barrel glides provide controlled expansion and contraction for thermal cycling for prolonged machine life vs metal-to-metal supports
The following chart indicates the different size SGTSE extrusion machines and how much hour usage can save money over time.
Vacuum Systems
The SGTSE® system relies on high vacuum to dry and de-volatilize the material as it is being extruded. Liquid ring vacuum pumps are industry proven and very well suited for this application. These pumps are tool less and designed to operate efficiently in environments where highly saturated vapors or particles will be present while providing years of reliable service life. The co-rotating feed screws of the SGTSE® system does not operate fully flooded with material, thus creating the ability to draw high vacuum over a large surface area on each side of a proprietary polymer seal section. Additionally this system runs at elevated screw speeds (up to 300 rpm) such that the high vacuum region (dual vacuum vent zones creates high vacuum over a 20+ L/D section of the machine) is under a constant state of renewal creating a highly efficient means for drying and devolatizing the extrudate as it's being processed. The vacuum circuits operate at a nominal vacuum pressure of 35 mbar. However, a unique system circuit design provides the capability to produce vacuum levels as high as 12 mbar should the process require it. As with any vacuum decontamination system regular cleaning is required.
Following a simple preventative maintenance schedule assures proper system function is maintained within the minimum amount of time and process interruption. The unique system design avoids the use of consumable filters or screens as part of its robust platform. Extracted moisture is condensed and stored for easy removal and proper disposal on weekly intervals.
Features:
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Stainless steel vent port assemblies provide ease of venting area access and eliminate corrosive tendencies due to high moisture level removal
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Easy to maintain high vacuum toolless system insures optimum process performance
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Patented high vacuum-long L/D twin screw extrusion technology with the highest installed base of "Dryerless" systems world-wide
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High torque rated screw shafts and elements featuring matched martensitic stainless steel for higher wear and corrosion resistance
OFFERING YOU THE BEST SOLUTION FOR YOUR EXTRUSION LINE
Processing Technologies International (PTi) is a global leader in high-performance sheet extrusion machinery. Engineered to exact standards, PTi systems feature innovative design solutions that deliver superior equipment performance and consistently produce sheet goods that meet the industry’s highest quality standards.
PTi offers a comprehensive range of products and services designed to support today’s sheet producers and the evolving demands of the future. While this overview highlights many available configurations and capabilities, it represents only a portion of the customized extrusion solutions PTi provides for a wide variety of applications.