Packaging bags and packaging bag production process

Abstract

The invention provides a packaging bag, and belongs to the field of packaging. The packaging bag comprises a paper layer, a plastic layer and a valve structure, wherein the bottom of the paper layer is bonded with the bottom of the plastic layer; the top of the paper layer is bonded with the top of the plastic layer; and the middle part of the paper layer and the middle part of the plastic layer are separated. According to the packaging bag, only the tops and the bottoms of the paper layer and the plastic layer are bonded, the middle parts are separated, the plastic layer and the paper layer are separately recycled, and the packaging bag is more energy-saving and environmentally-friendly; and patterns can be printed on the flat paper layer in advance, the printed patterns are flat and bright, and the appearance of the packaging bag is more beautiful. The invention further provides a production technology of the packaging bag. The production technology comprises the steps of printing the patterns on the paper layer; arranging the paper layer on the periphery of the plastic layer; bonding the top of the paper layer with the top of the plastic layer; bonding the bottom of the paper layer with the bottom of the plastic layer; forming a lower bottom and an upper bottom; and arranging the valve structure. According to the production technology, flatness and brightness of the printedpatterns of the packaging bag are guaranteed, and separated recovery of the plastic layer and the paper layer is facilitated.

Description

technical field [0001] The invention belongs to the technical field of packaging, and more specifically relates to a packaging bag and a packaging bag production process for producing the packaging bag. Background technique [0002] The valve bag is a popular international packaging bag at present. The material is fed from the top or bottom valve port. Special filling equipment is used. After filling the material, it is packed into a cube. The stack is neat and beautiful. It has the advantages of improving packaging efficiency, convenient transportation and strong firmness. , Low breakage rate and so on. In order to ensure the sealing and moisture-proof performance of the existing valve bags, paper-plastic composite sealed bags are mostly used. The inner plastic layer and the outer paper layer are laminated together by high-temperature lamination, and then printed and bag-shaped. Since the plastic layer and the paper layer are in the form of bonding and compounding, the out...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a packaging bag to solve the technical problems in the prior art that the overall bonding of the paper layer and the plastic layer leads to poor printing effect in the later stage and it is difficult to separate and recycle the paper layer and the plastic layer

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