Packaging and printing paper substrate with antibacterial property, and preparation method thereof

Abstract

The invention provides a packaging and printing paper substrate with antibacterial property. The printability of the paper substrate is good, and surface coating is adopted in the preparation of the paper substrate. The packaging and printing paper substrate comprises a paper substrate layer; aqueous coating material layers containing an antibacterial agent are uniformly coated on the upper and lower surfaces of the paper substrate. The antibacterial agent comprises an antibacterial functional material and a carrier. The antibacterial functional material is nano-grade silver or nano-grade silver and nano-grade copper. The carrier is nano-grade calcium carbonate. The weight percentages of the components are that: nano-grade metal silver takes 0.5-12.5%, nano-grade metal copper takes 0-1%, and nano-grade calcium carbonate takes 86.5-99.5%. The content of the antibacterial functional material in the aqueous coating material layers is 1-27ppm. According to the packaging paper substrate provided by the invention, inorganic nano-grade particles are adopted as the antibacterial functional component, and nano-grade calcium carbonate is adopted as the carrier of the antibacterial functional component. The paper substrate is advantaged in good antibacterial effect, low specific gravity, low cost, and improved printability. The paper substrate is especially suitable to be used in packaging paper in need of printing processing. The invention also provides a preparation method of the packaging and printing paper substrate.

Description

technical field [0001] The invention relates to a packaging base material, in particular to a packaging paper base suitable for printing, more particularly to a packaging printing paper base with antibacterial properties and suitable for printing. The present invention also relates to a preparation method of the above packaging printing paper base. Background technique [0002] At present, there are mainly two types of printing and packaging paper bases used in the fields of food, medicine, cosmetics, etc., one is soft paper base, and the other is hard paper base. They are all common paper base materials, usually made of After pulping, the pulp is directly sent to the wire section of the paper machine for papermaking. This kind of paper base generally does not have antibacterial function, and will be attacked by various bacteria and fungi in the subsequent printing, processing, distribution, sales and use processes. Pollution. With the development of the economy and the im...

AI Technical Summary

Problems solved by technology

The patent number is 200620113237.1, and the Chinese utility model patent titled "An Antibacterial Paper" discloses an antibacterial paper coated with an antibacterial layer on the upper and lower surfaces of the paper fiber layer. The antibacterial layer contains silver and zinc ions. The hydroxyapatite inorganic antibacterial agent is mixed with the surface sizing agent; due to the high oxidation activity of zinc ions, it is easy to chemically react with substances in the air and affect its antibacterial effect, and hydroxyapatite is used as the antibacterial agent for silver and zinc ions. The carrier, due to the large specific gravity of hydroxyapatite, reaches 3.2g / cm 3 , which will increase the specific gravity of the paper and cause troubles in subsequent processing and use

The patent number is 200710032549.9, and the invention title is "inorganic silver-loaded zeolite antibacterial paper and its preparation method". Mix, react at 70-95°C for 1-2 hours, centrifuge and wash to obtain Na-type zeolite, and then load a higher content of silver ions by ion exchange to make inorganic silver-loaded antibacterial zeolite for papermaking, and then This antibacterial zeolite is added to the wet end of papermaking or mixed with coatings for surface coating to obtain paper with antibacterial properties; due to the complexity of this method and the impact of zeolite on the performance of paper has yet to be studied, this method has not yet been developed. get promoted

In addition, in the above two patents, the particle size of the carrier used is too large, and it cannot form a stable colloid with paint, varnish, etc., and it is easy to precipitate, which is not suitable for surface coating.

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