Dust exclusion manner null of stenter for film

摘要

PURPOSE:To enable to remove even an oily scattered matter by improving drastically collective efficiency of a foreign matter in hot air, by passing circulation hot air in a stenter through a filter made of specific fiber. CONSTITUTION:Hot air controlled to a predetermined temperature is blown off toward a film 2 from a nozzle 5 and circulated within a stenter 1. The hot air is circulated by a fan while it is being controlled to the predetermined temperature by a heat exchanger provided within a duct 6. A filter 7 made of fiber of which void is 50%-90%, opening size is 0.1mum-20mum and a thickness of a filtering layer is 0.5mm-5mm is provided in a circulation course. As for the filter 7, a sintered metal fiber filter or the filter made of nonwoven fabric is used.