Double-sided composite card paper and preparation method thereof

Abstract

The invention provides double-sided composite card paper and a preparation method thereof. A lining pulp layer is covered on one side of a core pulp layer, a bottom pulp layer is covered on the other side of the core pulp layer and a surface pulp layer is covered on the lining pulp layer; or lining pulp layers are covered on two sides of a core pulp layer, a surface pulp layer is covered on the lining pulp layer on one side, and a bottom pulp layer is covered on the lining pulp layer on the other side. Common waste paper pulp (office waste paper, common waste paper boards and the like) is used for replacing wood pulp to serve as core pulp, and waste paper de-inking pulp and waste white paper edge pulp are used for replacing wood pulp to serve as lining pulp so as to save the cost; each layer is specifically quantified; and the obtained double-sided composite card paper has heavy handfeel and crisp paper surface, press molding and embossing processes required for processing and molding have better implementing effects, the expressed levels are richer, the dependency of the product on operating workers is furthest reduced, and effective expansion of the capacity and increment of the economic benefit are furthest realized.

Description

technical field [0001] The invention belongs to the field of papermaking, and in particular relates to a double-sided composite cardboard and a preparation method thereof. Background technique [0002] White cardboard (paper cup paper, double-adhesive cardboard) is a kind of thick paper that is strong, thick, and quantitatively large. Based on quantitative basis, it is divided into: paper, cardboard and cardboard; the most common white cardboard (paper cup paper, double-adhesive cardboard) is not colored, and is commonly called white cardboard (paper cup base paper, double-adhesive cardboard). If it is colored, it is uniformly called color cardboard according to the color. There are two basic coloring schemes for color cardboard: printing coloring and papermaking pigment coloring. [0003] White cardboard (paper cup paper, double-adhesive cardboard) is compact and crisp, and has a wide range of uses, such as various pharmaceutical packaging boxes, cigarette cases, cups, ch...

AI Technical Summary

Problems solved by technology

Compared with the reprocessing technology that requires printing, molding, and embossing, the white cardboard (paper cup paper, double-adhesive cardboard) in the current market has a very tight interlayer structure. In order to maintain a considerable stiffness of the paper product, papermaking During the process, the moisture content of the paper must be strictly controlled. In order to ensure that the full-page solid printing ink is uniform and there is no color block phenomenon, the papermaking process must be strict with paper surface smoothness and sizing uniformity. Moreover, moderate damage is required when embossing and indentation The rigidity of the paper product requires extremely high embossing and compression mold operation techniques. If the pressure is too high, the paper surface will be damaged, and if the pressure is too small, the forming will be poor. The unqualified rate of products is increased, and due to the long-term rise of labor costs, it is not conducive to the factory to expand production and increase economic efficiency

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