Process and assembly to sterilize a plastic web of food packaging material using ultra violet light

摘要

An assembly sterilizes a web (PB) of packaging material using an ultra-violet light (UV) source (4) positioned at the mid-point of a series of rollers (2) arranged in a circle. An assembly sterilizes a web (PB) of packaging material using an ultra-violet light (UV) source (4) positioned at the mid-point of a series of rollers (2) arranged in a circle. The web (PB) is fed to a first roller (8) around a first UV light source (4) exposing the first side of the web, and is then reversed over a second roller (5) around the circular series of rollers, exposing the second web (PB) face prior to the discharge feed point (5) from the tunnel (6).