| 摘要 |
Flat PE film (12) wound on roll (10) with embossed straps (20) enables the production of bags (30) in the FFS process in a way that static coefficient of friction on the surface of the bag increases which enables safer stacking of the filled bags on the pallet (40), because due to increased static coefficient of friction, stacked bags don't slide. On the endless flat PE film (12) are carried out four parallel longitudinal straps (20) with indentations, preferably oval recesses (14), wherein these longitudinal straps are no narrower than one seventh nor wider than one fifth of the width of the wider side (32) of the PE bag which is produced from such PE film, while the layout of the longitudinal straps (20) is realized in a way that on the middle of each wider side (32) of the PE bag are placed two longitudinal straps (20), where the straps are apart from each other no more than three full widths nor less than one full width of longitudinal strap (20). The production procedure of such PE film is realized by controlling the pressure by which toothed rollers (82) press PE film (12) while passing through two rollers (6, 83), wherein the pressure force depends on the thickness of the PE (12) film being embossed with straps (20) with oval elements (14). The variety of plastic bags could be realized from such flat PE film comprising embossed elements. |
