BOPS window film (Biaxially oriented polystyrene film) 1. BOPS window envelope film (environmental protection type) Is the most suitable use for the envelope window film thin, a very perfect read rates, can improve efficiency, thereby creating economic benefits. Whether it is an envelope manufacturer, bulk mail, the mail sorting business, postal operators, OPS film can bring you better work efficiency and economic benefits. 2. Feature: - Has a very good anti-static ability. - The smoothness of a good film, the production process in an envelope will rarely produce a result of thin film and mechanical standstill. - Film slitting good, with high-intensity endurance, meanwhile horizontally easily torn, very suitable for the production of high-speed operation of the envelope. - Low-cost, in China and Japan are using the standard 25um thickness, and other companies produced BOPS Materials 27um, 29um, compared the cost of a cheap film envelopes 8% ~ 16%. 3. Spec. sizes : BOPS film (Biaxially oriented polystyrene film) , Density :1.05(g/CM3) Color: Clear/ transparent, Thickness: 27 g/m2 ( 30 Microns ) ,29 g/m2 ( 32 Microns),35 g/m2 ( 39 Microns), Width : 100, 115 ,130 ,135 MM . Length : 3000-4000M .