The invention relates to a
preservative film and a method for preparing the same. The
preservative film comprises a resin base film, an
ethylene adsorption layer and a waterproof ventilation layer which are sequentially arranged on a stacked manner. The
ethylene adsorption layer comprises hollow porous
polymer micro-spheres with supported adsorbents, and the adsorbents comprise
potassium permanganate and are at least partially supported inside the hollow porous
polymer micro-spheres. The
preservative film and the method have the advantages that the waterproof ventilation layer is in contact with
fruits and vegetables when the preservative film wraps the
fruits and vegetables,
ethylene generated under the
respiration effects of the
fruits and vegetables can be transmitted into the ethyleneadsorption layer via the waterproof ventilation layer and can be removed by the
potassium permanganate in the ethylene adsorption layer, the
potassium permanganate is accommodated in the hollow porouspolymer micro-spheres, the hollow porous
polymer micro-spheres have large specific surface areas, the ethylene can cross large quantities of micro-spheres when transmitted into the ethylene adsorption layer, accordingly, sufficient reaction can be carried out on the ethylene and the
potassium permanganate, the reaction efficiency can be improved, the
utilization rate of raw materials can be increased, the ethylene can be efficiently removed, preservation effects can be improved, and the preservation duration can be prolonged.