High-Technology introduced the “ribbon” or “belt-type” continuous screen changer in 1969. As recognized leaders in the field of polymer melt filtration, the HITECH™ name has been synonymous with cutting edge technology in the field of continuous, fully automatic screen changers for plastics extrusion.
Now in our 5th decade, we continue to develop and adapt the simple and elegant operating principle of our screen changers to keep pace with ongoing advancements in extrusion and polymer science. As a family owned business, we are equally proud of our ability to maintain our independence as a business entity, which enables us to commit an unsurpassed level of resources to our product and to our customers.
HITECH™ screen changers are used in all fields of extrusion, including sheet and film, blown film, blow molding, filaments and fibers, pipe and profile, pelletizing, BOPP and BOPS. Used with all thermoplastics, including Polyethylene (LDPE, LLDPE and HDPE), Polystyrene (PS), Polycarbonate, ABS, Flexible PVC, Nylons (PA 6, PA 66) and PET as well as a wide range of engineering resins.
HITECH™ screen changers use a continuous 120’ (36 meter) long roll of filter screen to filter contaminants from the melt - no hot breaker plates to change or dirty screen packs to handle. The polymer pressure is used to advance the screen - no hydraulics or external power supply. Circulating cold water forms the leak proof polymer seals - no mechanical seals to wear.
The operating mode of HITECH™ screen changers works in harmony with the extrusion process. The steady rate of screen advancement smoothly blends with the polymer flow and automatically maintains uniform head pressures and melt temperatures throughout months of uninterrupted production.