Method for manufacturing polyamide resin laminated film roll

Abstract

The present invention provides a method for producing a polyamide-based resin laminated film roll, which can be smoothly laminated to a bag with a good yield even under high humidity, and is useful for efficiently producing a polyamide-based resin that can be biaxially oriented. A method of manufacturing a resin laminated film roll. The manufacturing method of the film roll of the present invention includes: melting and extruding the polyamide resin onto the surface of the moving cooling body to form a sheet and cooling to obtain a melt extrusion cooling process of an unstretched sheet; A biaxial stretching step of biaxial stretching in the longitudinal direction and a transverse direction; and a winding step of winding the biaxially stretched film into a roll. Moreover, in the melt extrusion cooling process, when the polyamide resin is melt extruded and cooled on the surface of the moving cooling body, flow is carried out between the electrode to which the DC high voltage is applied and the polyamide resin laminated sheet in the molten state. The corona discharge in the corona state gives the polyamide resin laminated sheet in the molten state enough charge to make it closely adhere to the moving cooling body.

Description

Technical field [0001] The present invention relates to a method for manufacturing a film roll formed by winding a high-quality polyamide resin laminated film with uniform physical properties on a long dimension with high productivity. In particular, it relates to a method for manufacturing and polyolefin resin. Resin film lamination is a method for producing polyamide-based resin laminated film rolls that have good processability (especially processability under high humidity) when used for packaging of distilled foods and the like. Background technique [0002] The biaxially oriented polyamide resin film with nylon as the main component is widely used as a variety of liquid foods and water-containing foods due to its strength, gas barrier properties, pinhole resistance, transparency, and printing properties. , Frozen food, distilled food, paste food, livestock and aquatic food and other food packaging materials, especially in recent years, has been widely used in distilled food...

AI Technical Summary

Problems solved by technology

However, even if it is a polyamide resin film roll with highly uniform physical properties as described above, when the lamination process is performed under high humidity such as in summer, the polyamide resin laminated film may not be well developed on the roll of the laminating machine. Slidability, may not be able to obtain good processing characteristics

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