Processing Technologies International LLC demonstrated its dryerless sheet lines, for running PET and polylactic acid, during the Society of Plastics Engineers Thermoforming Conference, held Sept. 17-20 in Schaumburg, Ill, and plans to do it again after Kreyenborg Group's Polyester Extrusion and Recycling Forum, Oct. 11 in Rosemont, Ill.
At both events PTI ran complimentary transportation to view sheet line in production at PTI headquarters in nearly Aurora, Ill.
The production-scale unit can run more than 2,000 pounds of material an hour. It will run a variety of resins, including post-consumer and post-industrial PET and PLA, plus polystyrene and polypropylene.
PTI teamed up with Italy's Bandera Luigi Costruzioni Meccaniche SpA to develop the system. Bandera's high-vacuum co-rotating twin-screw extruder (HVTSE) is joined to a PTI single-screw sheet line and other PTI downstream equipment.
HVTSE allows PET to be processed without the need for drying and crystallizing the material.
Dennis Paradise, PTI's senior vice president of sales and marketing, said PTI and Bandera have agreed to an exclusive 10-year strategic alliance, for PTI to market the dryerless technology in North America.
Paradise said the first dryerless sheet line was installed, and started running in early September, at a major plastics supplier. He declined to name the customer.
PTI has invested more than $3 million to build the dryerless sheet line.
During the SPE Thermoforming Conference, Jim Johnson, PTI's senior vice president of technology, delivered a technical presentation about the system. He said 85 of the Bandera HVTSE extrusion systems are in place around the world. The lines have an output range from 1,500 to 5,200 pounds an hour.
A dual-zone high vacuum section pulls off the moisture. A gravimetric feeding device gives precision control of material formulations.
Benefits include lower energy consumption and no dryer to maintain. “It's a win, win situation,” he said.
Tel. 630-585-5800, fax 630-585-5855.