| 摘要 |
Disclosed is a process for producing a three layers co-extrusion biaxially polypropylene (hereinafter as BOPP) synthetic paper of thickness 25-250 mu m. More particularly, the invention relates to a process for producing a three layers biaxially oriented PP synthetic paper by means of three layers co-extrusion wherein two different PP resin compositions are separately extruded by one primary and two secondary extruders first, and then are co-flowed by a same T-die to form a three layers coating sheet, and through cooling, biaxial orientation, corona treatment and winding to form a three layers co-extrusion synthetic paper of thickness 25-250 mu m. The three layers structure of said three layers co-extrusion synthetic paper of thickness 25-250 mu m can be made into three kinds, such as: paper sheet layer/ foamed intermediate layer/ paper sheet layer with double side paper sheet layer, paper sheet layer / foamed intermediate layer/ resin layer with single side paper sheet layer and resin layer/ foamed intermediate layer / resin layer with double side high gloss resin layer. <IMAGE> |
