1results about How to "Decrease work of adhesion" patented technology

The present application relates to a kind of polyolefin heat-seal film and its preparation method.The heat-seal film includes sequentially stacked in the direction away from content and the raw material glass transition temperature gradient is not less than 10 ℃ heat-seal film, transition film and connecting film.Heat-seal film is made of the ethylene-based polyolefin elastomer of specific density and melt flow rate and plastic body, preferably adding end silane group end polyethylene.Preparation method uses multiple extruders co-extrusion, reverse film blowing process molding, and the connecting layer is carried out corona treatment and temperature control winding.The structure design cooperates specific raw material and process, realizes the low-temperature heat-seal performance of sealing temperature as low as 70-80 ℃, simultaneously, after 7 days ripening at 50 ℃, the unwinding force ratio is not greater than 1.5, effectively solve the problem of low-temperature heat-seal strength deficiency and film layer adhesion, with good mechanical strength and thermal stability.