Paper-plastic packaging bag and preparation method thereof
A packaging bag and paper-plastic technology, applied in the field of paper-plastic packaging, can solve the problems of volatilization of chemical components, poor air barrier performance, moisture deterioration, etc., and achieve the effect of increasing water resistance, good water resistance, and improving adhesion.
Inactive Publication Date: 2018-10-26
HANGZHOU HONGPAN PAPER & PLASTIC
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Problems solved by technology
However, the paper-plastic packaging bags produced by the current technology are poor in air barrier performance. When used in food packaging, it is easy to cause food oxidation and moisture deterioration. When used in medical and cosmetic packaging, it is easy to make chemicals Components volatilize to the outside through the packaging bag
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0018] In order to facilitate the understanding of the present invention, the preferred embodiments of the present invention given below describe the present invention in detail.
[0019] A method for preparing a paper-plastic packaging bag of the present invention comprises a paper substrate layer, an air barrier layer and a thermoplastic resin layer, and the polyvinyl alcohol aqueous solution is applied to the paper substrate layer to obtain an air barrier layer (i.e. PVA film), it is also possible to corona treat the paper substrate layer and apply primer glue to form a base film, and coat the polyvinyl alcohol aqueous solution on the base film after cooling. The coating and film-forming process can adopt existing conventional technologies, such as gravure coater, dip coater, wire bar coater or reverse coater, which will not be repeated here. The air barrier layer and the thermoplastic resin layer are combined into an integral laminated film by dry lamination molding or ext...
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Abstract
The invention discloses a paper-plastic packaging bag and a preparation method thereof. The paper-plastic packaging bag comprises a paper base material layer, an air blocking layer and a thermoplasticresin layer, wherein the paper base material layer is coated with a polyvinyl alcohol water solution and then is subjected to drying treatment to obtain the air blocking layer; the air blocking layerand the thermoplastic resin layer are combined to form a whole body through a dry type lamination molding method or an extruding lamination method, wherein the polyvinyl alcohol water solution is prepared from polyvinyl alcohol, cellulose nano-fibers, a surface tension regulation agent, an auxiliary agent and de-ionized water. The paper-plastic packaging bag prepared by the method has good air blocking performance and is applicable to fields including food packaging, health care, makeup products and the like.
Description
technical field [0001] The invention relates to the technical field of paper-plastic packaging, in particular to a paper-plastic packaging bag and a preparation method thereof. Background technique [0002] Paper-plastic bags are composited by plastic and kraft paper. Usually, the plastic layer is flat woven fabric with polypropylene as the base material, and the kraft paper is made of refined composite kraft paper. The two are bonded by molten plastic heat lamination, which is convenient Shipment, loaded with powdery and granular materials, has high strength and good water resistance, so it has become a more popular and practical general packaging material at present. With the development and progress of technology, the extrusion molding process is used to obtain the paper-plastic composite film and is applied to the kraft paper substrate by heating, so as to form a plastic layer on the surface of the kraft paper to make the paper-plastic packaging bag. In recent years, pa...
Claims
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IPC IPC(8): B32B27/32B32B27/10B32B29/06B32B7/08B32B33/00B32B37/10B65D65/40D21H19/12B05D7/24B05D5/00
Inventor 莫小伟
Owner HANGZHOU HONGPAN PAPER & PLASTIC