Paper-plastic composite woven bag and production process thereof

Abstract

The invention discloses a paper-plastic composite woven bag and a production process thereof. The process includes the steps of firstly, coating one face of kraft paper with a polyethylene material, and coating the polyethylene material layer with a high-resistance material; secondly, selecting any mode as follows: the first mode of connecting the high-resistance material layer with the outer surface of a bag body through extrusion casting, compositing and hot sealing to form a cylinder bag, and the second mode of flat distributing the bag body on the high-resistance material layer after cutting the bag body and connecting the bag body with the high-resistance material layer through extrusion casting, compositing and hot sealing to form a composite; thirdly, when the first mode is adopted, sewing a bag sewing thread at the bag opening of the cylinder bag and attaching paper-plastic adhesive tape to the two faces of the bag sewing thread, when the second mode is adopted, connecting middle seams through hot sealing to form the cylinder bag first, sewing the bag sewing thread and attaching paper-plastic adhesive tape to the two faces of the bag sewing thread. Objects packaged in the bag can be effectively prevented from oxidization and caking and can be stored for a long time, and meanwhile the quality and storage time of the paper-plastic composite woven bag are remarkably improved and prolonged.

Description

technical field [0001] The invention relates to a paper-plastic composite woven bag and a production process thereof. Background technique [0002] The existing paper-plastic composite woven bag includes a three-layer structure, the first layer is a polypropylene woven bag, the third layer is kraft paper, and the ethylene-propylene polymer resin is used as the second layer, which is used as a molten plastic casting extrusion composite weaving At the same time, the bag mouth of the paper-plastic composite woven bag is sealed with paper-plastic adhesive tape sewn with cotton thread. However, due to the high water and oxygen permeability of kraft paper and ethylene-propylene polymer resin; the paper-plastic adhesive tape bonded to the seam line of the paper-plastic composite woven bag cannot be well waterproof and moisture-proof, and is affected by the gravity of the items in the bag. Affecting the pinholes of the sewing thread is easy to cause large air leakage, which aggrava...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a high-barrier paper plastic bag in order to overcome the defects that the existing composite woven bag cannot be effectively waterproof, moisture-proof, and mildew-proof, and the items in the bag are easy to deteriorate, and the composite bag is not durable for a long time. Composite woven bag and its production process

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