Method for manufacturing paper-plastic composite bag with window

Abstract

The invention discloses a method for manufacturing a paper-plastic composite bag with a window, which comprises the steps of: (1) longitudinally cutting a window with preset width at the needed position of paper; (2) spreading glue on the surface on one side of a plastic film except the area corresponding to the window; (3) oppositely laminating the paper with one surface of the plastic film spreading with the glue to form a composite material; and (4) molding the composite material into the bag with the window which has the needed specification and shape. The manufacturing method is high in continuity of manufacturing procedures and high in production efficiency; and the product has unlimited window size and is low in manufacturing cost.

Description

technical field [0001] The invention belongs to the field of food packaging, in particular to a method for making a food packaging bag. Background technique [0002] In order to prolong the shelf life of food and facilitate long-distance transportation and storage, food is packaged in packaging bags. In order to save environmental protection, many foods begin to use paper packaging bags, and in order to facilitate the display of the contents and facilitate customers to choose and buy, paper packaging There is also a window on the bag, refer to Figure 4 As shown, it is a commonly used process for making paper packaging bags with windows at present. The main steps are: [0003] (1) material preparation: prepare required paper 10 and plastic film, such as figure 1 As shown, wherein the plastic film can be polypropylene film, polyvinyl chloride film or polyester film etc., and use slicer to process this plastic film slice into the plastic film 20 of required specification and...

AI Technical Summary

Problems solved by technology

[0008] (1) When the size of the window 101 increases, the volume of the window opening machine 30 is required to increase accordingly, resulting in an increase in machine cost, and it is difficult to control during the processing, so the size of the window 101 is small, and if the size of the window 101 is changed, The specifications of the window opener 30 must be replaced accordingly, increasing the production cost;

[0009] (2) Since the size of the remaining paper 10 after the aforementioned window opening process is small, it cannot be used for other purposes, resulting in waste;

[0010] (3) When the window opening machine 30 is performing the window opening operation, the paper 10 enters the predetermined position and starts to press down to punch holes, then move upwards, wait for the next section of paper 10 to arrive, and then press down to punch holes. It can be seen that the processing process has interruptions. sex, low efficiency;

[0011] (4) The whole production process requires multiple mechanical equipments to be used together. Not only are the window opening machines 30 used, window sticking equipment and other special equipment expensive, but also each window 101 is processed separately during window opening and window sticking. The process is not continuous and the overall production efficiency is low

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