HEPA  Filter Using; Applied to the terminal filtration for the air-condition filtration system Used in hospital ,electronic industry, food , precision instrument, electron semiconductors Speciality: Waveness aluminium foil pleat or the paper pleat can make use of the filtration material completely. The thickness of the aluminum foil is 0.03 mm, the height of the waveness is 4mm, which make sure of the filtration area and the quality of the filter. The filtration material is the high density paper which is made from super fine fibreglass. Pleat the filtration paper ( made from the fiberglass) in order to enlarge the filtration area as large as possible and to slowdown the filtration speed. It is very important for the HEPA filter. laser testing one bye one; Temp. resistance up to 80℃; Small resistance; Long service life