The invention discloses a manufacturing method for chemical fertilizer packaging bags, including the following steps: A. Batching; B. Blown film extrusion; C. Marking; D. Cutting and heat sealing. The tubular film is cut into segments, an integral water bag is sandwiched between the outer plastic film and the middle plastic film, and the peripheries of the water bag and the two film layers are compressed and heat sealed by a hot pressing machine. The overall thickness is controlled within 100 渭m to 200 渭m to complete the packaging bag production. The masterbatch of each film layer is surface-modified by corona treatment and controlled plasticizing temperature inside the blow molding machine, then co-extruded through a single die head to form a three-layer integrated tubular film consisting of an inner layer, a middle layer and an outer layer. With the integral water bag arranged between the outer and middle film layers, TEM tests verify that the thermal dispersion of the packaging bag is significantly improved, facilitating rapid heat dissipation.
Area Code: CN
Application Number: CN201710776721.5
