Coated craft paper and production method thereof

Abstract

The invention discloses coated craft paper and a production method thereof. The coated craft paper comprises a core paper layer; the upper side of the core paper layer is a surface paper layer, and the lower side is a bottom paper layer; a coating layer is arranged on the upper surface of the surface paper layer; the bottom paper layer and the core paper layer are prepared by the steps of: dosing the waste paper, preparing waste paper pulp to obtain non-deinked waste paper pulp, and manufacturing paper through a paper layer to obtain a wet bottom paper layer and a wet core paper layer; the surface paper layer is prepared by the steps of: manufacturing paper through a paper layer by taking the UKP pulp, the non-deinked waste paper pulp or the mixture of the UKP pulp and the non-deinked waste paper pulp as the pulp to obtain a wet surface paper layer; and the wet bottom paper layer, the wet core paper layer and the wet surface paper layer are subjected to the steps of compounding with the coated body paper, preliminary drying, sizing, later drying, paper surface calendering, paper surface coating and after-treatment to obtain the coated craft paper. The available waste paper types are increased, and the fiber source is wider; and meanwhile, the quality of the waste paper pulp is effectively stabilized so as to guarantee the quality stability of the coated body paper and the white-surface craft paper and avoid easy layering, splitting and scaling.

Description

technical field [0001] The invention relates to a kraft cardboard, in particular to a coated kraft cardboard and a production method thereof, belonging to the technical field of kraft cardboard manufacturing. Background technique [0002] With the development of the national economy, the circulation of various commodities such as electronics, electromechanical, instrumentation, daily chemicals, clothing and textiles is increasing. Quality also puts forward higher requirements. [0003] Traditional kraft cardboard is usually a single-layer structure formed by single-network forming. In order to increase its thickness and stiffness to provide better packaging performance, it has gradually developed into a two-layer or multi-network composite. or multi-layer structure. At present, most of the products on the market are a three-layer paper structure that is made of three forming wires and then compounded. Due to the increase in the thickness of the kraft cardboard, the strengt...

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is to provide a kind of coated kraft cardboard and its production method in view of the above deficiencies, which can overcome the problems of easy delamination, breakage, peeling, paper surface pigment layer coverage and ink absorption in the prior art. Inhomogeneous defects, the kraft cardboard manufactured by the method is not easy to delaminate, break, and burst. At the same time, the pigment layer covering and ink absorption on the paper surface are uniform, environmentally friendly, and low in cost.

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