The invention provides a microporous
preservative BOPP film, and belongs to the technical field of biaxially oriented
polypropylene films. The microporous
preservative BOPP film comprises an upper
surface layer, a core layer and a lower
surface layer, the upper
surface layer is arranged on an upper surface of the core layer, the lower surface layer is arranged on a lower surface of the core layer, the microporous
preservative BOPP film is characterized in that the upper surface layer is an anti-adhesion layer, a preset number of micropores formed by
laser boring are uniformly formed in the surfaces of the upper surface layer and the lower surface layer, as the
laser boring is added in the last procedure of film preparation in the preparation method, the process is simple, the control is accurate, the distances and sizes of the micropores can be adjusted, the prepared film has good air permeability and
mechanical property, no micropore defective tearing is generated, and the microporous preservative BOPP film is suitable for averagely regulating and controlling the
atmosphere in the
package so as to play a better preservative effect.