Matte type high-barrier flat-bottom-zipper nut packaging bag and preparation method thereof

Abstract

The invention provides a matte type high-barrier flat-bottom-zipper nut packaging bag and a preparation method thereof. The nut packaging bag comprises a bag body and a sealing zipper chains, the bagbody is composed of a front bag body, a rear bag body and a bottom layer, the front bag body and the rear bag body are arranged on the two sides of the bottom layer respectively, the upper ends of thefront bag body and the rear bag body are connected through sealing zipper chains, the front bag body, the rear bag body and the bottom layer are the same in composition and structure, and the front bag body comprises a base layer, an aluminum plating layer, a high-barrier polypropylene film layer, an adhesive layer, an ink layer, a matte layer and a heat-sealing film layer. According to the nut packaging bag, the mechanical strength of the bag body can be improved through the high-barrier polypropylene film layer and the aluminum plating layer, and has good moisture-proof performance, light-shielding performance, ultraviolet-proof performance and sealing performance, and the storing life of the nut in the bag body can be prolonged, and the combined airtightness between the front bag body,the rear bag body and the bottom layer can be improved through the concave folding lines below the front bag body and the rear bag body and the convex folding lines on the two sides of the upper surface of the bottom layer.

Description

technical field [0001] The invention relates to the field of packaging bags, in particular to a matte high-barrier flat-bottom zipper nut packaging bag and a preparation method thereof. Background technique [0002] Nuts are a category of closed fruits, with hard skins and one or more seeds inside. For example: chestnuts, walnuts, pistachios, cashews and almonds, etc. Most of the nuts have a hard and sharp shell, so when choosing a nut packaging bag, the mechanical strength of the packaging bag should be relatively high. In addition, the preservation of nuts needs to be kept in a sealed, dry environment with good antibacterial effect in order to better maintain the flavor of nuts. [0003] The mechanical strength and airtightness of the existing packaging bags are relatively poor, resulting in air leakage, which directly affects the storage of nuts in the bag, and the nuts are easy to deteriorate and rot. In addition, the ink layer of the existing packaging bags has a high ...

AI Technical Summary

Problems solved by technology

[0003] The mechanical strength and airtightness of the existing packaging bags are relatively poor, resulting in air leakage, which directly affects the storage of nuts in the bag, and the nuts are easy to deteriorate and rot. In addition, the ink layer of the existing packaging bags has a high brightness, and the light reflection After-effects are displayed on the graphic display on the packaging bag. At the same time, some existing nut packaging bags cannot be sealed again after the opening is torn, which cannot meet the daily sealing needs of snacks.

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