JPH0623951A - Method of treating surface of paper capable of being recycled - Google Patents

Abstract

PURPOSE:To enhance a glazing effect and a water resistance and make it possible to recycle paper including a surface-treated portion of paper by cooling and coating a surface of paper with cellulose acetate after contact-bonding a cellulose acetate film to the surface of paper with a heated roll, or after applying powder of cellulose acetate to the surface of paper to be contact-bonded thereto with the heated roll. CONSTITUTION:A cellulose acetate film 2 is contact-bonded to the surface of a cover 1 of for example, a magazine with a roller (gamma) heated to such a degree that the cellulose acetate film 2 is melted to be contact-bonded to the cover 1, or powder 2a of cellulose acetate is applied to the surface of the cover 1 of the magazine to be contact. bonded to the surface thereof with the roller (gamma) heated to such a degree that the powder 2a of cellulose acetate is melted to be contact-bonded to the cover 1. After the cellulose acetate film 2, or the powder 2a, of cellulose acetate, thus contact-bonded is cooled, it is converted into a transparent film to protect the surface of the cover 1. Since cellulose acetate has less moisture-absorption properties, it is effective as a treatment agent for a surface of paper, and paper coated with the cellulose acetate film 2, or with the powder 2a of cellulose acetate, can be recycled as it is even after it is discarded.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Surface treatment methods for magazines, weekly magazine covers, cardboard or bags.

[0002]

2. Description of the Related Art Conventionally, the surface treatment of magazines, weekly magazine covers, corrugated cardboards, bags and the like has been performed by applying a PVA film laminate to prevent water wetting and moisture intrusion.
Alternatively, PVA resin is applied.

However, since PVA film is generated when chlorine gas is burned, it is a source of environmental pollution.

[0004]

[PROBLEMS TO BE SOLVED] To eliminate the pollution generated by vinyl chloride resin, which has been conventionally used for the surface treatment of paper such as magazines, cardboards, and bags.

[0005]

[Technical Means] According to the present invention, an acetic acid fibrin film is laminated on the paper surface instead of the conventional surface treatment method by laminating a vinyl chloride film on paper, or a powder of acetic acid fibrin is applied and pressure-bonded to obtain a glossy finish. It is intended to give water resistance.

[0006]

[Function] The magazine, weekly magazine, corrugated cardboard, etc. can be recycled after being used or even if the paper is surface-treated with a fibrin acetate.

[0007]

EXAMPLES Examples of the present invention will be described below. As shown in FIG. 1, a fibrous acetate film 2 is pressure-bonded to the surface of a cover 1 of a magazine with a heating roll r. The heating roll r is heated to such an extent that the acetic acid fibrin film 2 is melted and pressure-bonded to the cover sheet 1.

After the pressure-bonded fibrin acetate film 2 is cooled, it becomes a transparent film to protect the surface of the cover sheet 1. Since fibrin acetate has low hygroscopicity, it is effective as a surface treatment agent for paper. Further, even after discarding, the paper coated with the fibrous acetate film 2 can be recycled as it is.

As shown in FIG. 2, the surface of the paper 1 is coated with the acetic acid fibrous powder 2a, and the hot roll r presses the acetic acid fibrous powder 2a onto the paper 1 as in the case of FIG. After cooling, a fibrin acetate film is formed as in the case of FIG. In terms of performance, the same surface treatment as in FIG. 1 can be performed.

[0010]

Since the chemical structure of fibrin acetate is essentially the same as that of paper, when it is recycled, the fibrin acetate becomes a part of the composition of the paper as it is, and the performance of the recycled paper is improved. Does not deteriorate. Therefore, the paper obtained by the method of the present invention, including the surface-treated portion, can be recycled.

Further, since the fibrin acetate is rich in the polishing effect and the water resistance, it is not inferior to vinyl chloride in performance as a paper surface treating agent.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention,

FIG. 2 is an explanatory view of the second embodiment,

[Explanation of symbols]

1: Paper, 2: Acetate fibrin film, 2a: Acetate fibrin powder, r: Heat roll.

Claims (2)

[Claims] 1. A method for surface treatment of a paper, wherein a surface of a paper 1 is pressure-bonded with a fibrin acetate film 2 by a heating roll r, and then cooled to cover the surface of the paper 1 with a fibrin acetate. 2. The surface of the paper 1 is coated with the acetic acid fibrin powder 2a, the fibrin acetate is pressed onto the surface of the paper 1 by a heating roll r, and then cooled, and the surface of the paper 1 is coated with the fibrin acetate. Method for surface treatment of paper.