Plastic Film Extrusion Machinery Manufacturer-Nanjing Sumino Precision Machinery Co.,Ltd

Brief Introduction

PA film has the advantages of high strength, good continuity, high temperature resistance and cold resistance, etc. It can be used in the range of -50~180¡æ to replace high-temperature cooking materials and frozen packaging materials; it also has good oxygen barrier properties Characteristic, it is a barrier material.

The main types of PA used to produce films are: PA6, PA12, PA66, etc., packaging meat products and sausages, requiring an oxygen permeability of 20 to 80 cm3/m2¡¤24h, PA6 is the ideal packaging material.

Production equipment

¡ñExtruder: Generally use ¦µ90¡«150mm single screw extruder, L/D is 28¡«35, the geometric compression ratio of screw is 3.4¡«4, and mixing type screw is used.

¡ñDie head: branch-pipe type heads are mostly used, and the length of the die lip shaping section is slightly longer than that of CPP.

¡ñCooling device: The cooling device of PA film is different from that of CPP, and it needs to be cooled in two steps. The casting roll is an oil-cooled roll with hot oil passing through the roll, and the surface temperature of the roll is 90-100¡ãC. Then it was cooled with a water cooling roll, and the film was cooled to room temperature. If the CPP rapid cooling method is used, the PA film will be severely wrinkled, and a product with good flatness cannot be obtained.

¡ñOther equipment: Other equipment is basically the same as CPP.