DUST-PROOF FILM

PURPOSE:To prevent the object to be covered from deposit of dust, while dimisting treatment agent dissolved in water is stuck onto the object to be covered by a method in which the natural resin layer with low tear propagation strength is formed on both surfaces of the transparent synthetic resin film with high tear propagation strength, and a dimisting treatment layer is laminated on said resin layer. CONSTITUTION:Natural resin layers 2, 2 are laminated on both front and rear of the synthetic resin film 1 used as a base, and onto said surfaces, dimisting treatment layers 3, 3 are applied. As the synthetic resin film 1 constituting an intermediate layer, polyethylene terephthalate, polyethylene, polypropylene, vinyl chloride and acryl etc., having high tear propagation strength are used. On the natural resin layers 2, 2 to be laminated on both surfaces of the synthetic resin film 1, the natural resin such as cellulose having the easiness of dimisting working and the high durability of dimisting hardening is laminated by means of spray etc., and one filmy object is formed. The surface of the natural resin layers 2, 2 are coated with dimisting coating agent, and on said surfaces, the dimisting treatment layers 3, 3 by alkali surface saponification etc., are formed.