JPH06272197A - Cross stripe-patterned paper and its production - Google Patents

Abstract

PURPOSE:To develop cross stripe water mark pattern which has no difference when it is seen from both faces by setting wires to the wire network of dandy rolls at a prescribed interval in the lengthewise or widthwise direction and placing the dandy rolls continuously on the wire network part. CONSTITUTION:Wires are set to the wire network of individual dandy rollers at prescribed intervals lengthwise or widthwise and these dandy rollers are continuously placed on the wire part of the Fourdrinier paper machine. The pulp slurry mainly consisting of wood pulp is made into paper by means of this machine to give the paper having cross stripe pattern formed by lengthwise and widthwise dandymarks crossing at a prescribed interval.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses wood pulp as a main raw material and is used as a fancy paper for packaging with high cosmeticity and high quality, for high-grade printing, notebook or book cover, back cover, catalog, calendar paper, etc. The present invention relates to a pattern paper having a checkerboard watermark pattern used and a method for manufacturing the same.

[0002]

2. Description of the Related Art As a method of forming a watermark pattern of a crease pattern on paper, a method of using a raid type dandy roll using a crenel mesh wire as an upper net of a dandy roll is known. Is a writing paper,
It has been widely used as book paper. This method has a problem in that a good pattern appears on thin paper, but in the case of a slightly thick paper, the pattern appears on the front side but the pattern does not appear easily on the back side. In addition, recently, pattern papers with aesthetic appeal and high quality have been demanded for packaging and printing, and it is satisfactory with the conventional standardized watermark watermark pattern paper consisting of only straight lines in one direction. In response to market demands, we have proposed and put on the market a variety of innovations such as spacing, thickness, shades, and wavy pattern formation, all of which are groundbreaking new products. Not in the present situation.

[0003]

The present invention was developed in response to the current state of affairs that awaits such new products, and is a watermark checkered pattern paper in which vertical and horizontal lines intersect, which has never been seen before. It is intended to provide a checkerboard pattern paper on which the pattern is clearly expressed on the back side thereof and a method for producing the same. The raid type dandy roll used for the production of conventional cross-patterned paper is
To support the wire, holes are provided in the circumference of a circular plate that is arranged at regular intervals in the lateral direction of the roll, or grooves are provided in the circumference, but using thick wire will disturb the pattern or paper texture There is a problem such as defectiveness. When using a thin wire, stretching or bending causes unevenness and the pattern disappears. In addition, if the paper is 80 g or more and is a little thick, However, there is a problem that it is difficult to check the pattern when viewed from the back side, and like the pattern paper according to the present invention, a pattern paper that has a watermark pattern with no difference between the front and back and has a checkered pattern has not yet been put on the market. .

[0004]

As a result of various studies to achieve the above object, when a wire is arranged vertically or horizontally on an ordinary dandy roll whose outer peripheral surface portion is a wire mesh, the wire mesh is supported. It was found that the bending of the wire for obtaining the vertical and horizontal patterns was eliminated due to the force, and a good checkerboard watermark pattern was obtained. That is, during papermaking, after forming a dandy mark in the lateral direction of the paper with a horizontal wire dandy roll in which wires are attached at a predetermined interval in parallel to the wire mesh of the dandy roll, it is made substantially perpendicular to the axial direction of the dandy roll. By forming a dandy mark in the vertical direction of the paper by using a dandy roll for a vertical line in which a wire is arranged on a wire mesh as described above, a watermark pattern having a lattice stripe in which the vertical line and the horizontal line are orthogonal to each other is formed. The wire used for the dandy roll may be any method such as a method of arranging wires having the same diameter or a plurality of wires having different diameters, or a method of combining these, and depending on the combination, the plaid pattern has a change in shading. It is possible to solve the problem by finding out that a checkered pattern, which has never existed before, is formed.

The vertical wire dandy roll may be fixed by winding a wire at predetermined intervals one by one or by winding it in a spiral shape. The wire used for the vertical and horizontal lines may have a specific thickness, or multiple wires with different diameters may be used.In the latter case, the thickest wire used is the watermark. Since the pattern is also deeply emphasized, if it is arranged at regular intervals, the pattern will become regular, and if it is arranged randomly, the fineness and shade of the watermark lines will appear at random, and the thickness of the wire and A variety of patterns can be freely selected by selecting the interval, arrangement, and the like. It is also possible to obtain a rhombus checkered pattern paper by wiring the vertical and horizontal wires at different angles from the axis of the dandy roll.

The two dandy rolls are placed in parallel on the wire part of the Fourdrinier paper machine. However, if the water content of the paper stock on the wire between the dandy rolls changes significantly, the appearance of the watermark pattern is affected. It is advisable to adjust the suction degree of this portion of the suction box so that the change in water content is minimized.

To obtain a colored checkered pattern paper,
A method of coloring the pulp pulp of the raw material for papermaking, and a size press installed in the drying process of the paper machine, the dye is dissolved in an aqueous solution containing a sizing agent and a coating agent for enhancing the surface paper strength, and coated. Then there is a method of coloring. Any method may be used, but the method using a size press has a small amount of fibers in the watermark part of the dandy mark, and since more dye solution easily penetrates because it is concave, it is dyed in a darker color. This is a more preferable method because it has the effect of clearly expressing a checkered pattern.

[0008]

[Function] For vertical and horizontal wire dandy rolls, if wires with the same diameter are used, a checkered pattern paper with the same watermark width is obtained, and if wires with different diameters are used, the widths of the watermarks are different and the wire intervals are constant. Alternatively, a variety of varied checkered pattern papers can be obtained by taking them arbitrarily. In any case, the pulp fibers in the stock on the wire are moved by the wire, and a part where the pulp fiber is small is formed linearly to develop a watermark pattern, but the amount of pulp fiber excluded by the size of the wire diameter. However, the watermark pattern also becomes thick and light correspondingly. A paper having a checkered pattern is obtained by placing vertical and horizontal dandy rolls in parallel on the wire part. When this paper is coated with a colorant such as dyes and pigments in a size press together with a binder solution such as a sizing agent, starch and PVA, the checkered pattern part is dyed dark and the checkered pattern is clearly expressed, giving it a beautiful pattern. It becomes paper.

[0009]

EXAMPLES The present invention will be described below with reference to examples. Parts and% used here are parts by weight and% by weight. It should be noted that the following examples do not fully explain the present invention,
Thin wire, spacing, formed on the wire mesh of dandy rolls
It goes without saying that many patterns other than those in this embodiment will appear depending on the angle, the color of the dye, and the shade. Example 1 A diameter of 1.2 m is parallel to the axis on a wire mesh of dandy rolls.
Three wires having different thicknesses of m, 1.0 mm, and 0.6 mm are arranged at intervals of 5 mm in the order of thickness, and these are repeatedly attached to form a horizontal wire dandy roll. Then, on a wire mesh of dandy rolls, a diameter of 1.2
mm wires are wound in a spiral shape at intervals of 5 mm to be attached to form a vertical wire dandy roll. This is placed on the wire of the Fourdrinier in the order of the horizontal wire dandy roll and the vertical wire dandy roll. 30 parts NBKP, LBK
450m of P70 part pulp with Canadian freeness
beat to l, neutral part 0.1 parts, cationized starch 2
Add parts to make paper stock, and pour it on the wire of the Fourdrinier paper machine,
Vertical and horizontal dandy rolls are rotated in the wire advancing direction to make paper, and a solution of 3% PVA and 2% starch added with 0.04% of blue direct dye is coated with a size press to weigh 93 g / m ^2. Got the paper. This paper has a horizontal line of 5 m
Watermark patterns with different widths arranged at m intervals are arranged at three pitches,
The vertical lines are thick and have the same width and are arranged at intervals of 5 mm. The vertical and horizontal lines are dyed with a blue dye in a darker color than other parts, and the checkered pattern is lifted up to make a decorative checkered pattern paper having no front and back difference.

Example 2 On a wire net of a dandy roll, three wires having different diameters of 1.2 mm, 1.0 mm, and 0.6 mm are arranged at an interval of 5 mm in order of thickness so as to be substantially perpendicular to the axis. Wind it up in a spiral to create a vertical wire dandy roll. Except for using 0.2% of fluorescent dye as the dye of the size press coating liquid, horizontal wire dandy rolls, pulp slurry, and binder composition of the size press liquid were all produced in the same manner as in Example 1 and weighed 93 g / m ² . Got the paper. This paper is a beautiful patterned paper in which three vertical stripes and three horizontal stripes having different widths are arranged at intervals of 5 mm, and the fluorescent dye makes the lattice stripes appear white.

Comparative Example 1 A 93 g / m ² paper was obtained in the same manner as in Example 2 except that the fluorescent dye of the size press coating solution was omitted. When this paper is seen through light, a slight checkerboard pattern can be seen, but when observed under normal conditions, almost no pattern can be seen.

[0012]

INDUSTRIAL APPLICABILITY The present invention is a vertical line which has not been on the market until now.
It is intended to provide a checkerboard pattern paper by watermark using horizontal line dandy rolls and a manufacturing method thereof, and by dyeing it in a light color with a size press, the watermark part of the checkerboard becomes darker than other parts. This is a new pattern paper that has the function of being dyed to raise the checkered pattern.

Claims (4)

[Claims] 1. A checkerboard pattern paper, which comprises wood pulp as a main raw material, and is formed such that horizontal and vertical dandy marks intersect each other at a predetermined interval. 2. A horizontal line or a vertical line attached to a wire mesh of different dandy rolls is composed of a plurality of wires having the same diameter and / or different diameters, and the wires are arranged at a predetermined interval. A method for producing a checkered pattern paper, characterized in that dandy rolls are manufactured using a Fourdrinier paper machine that is continuously placed on a wire part. 3. The pattern paper according to claim 1, wherein the checkered portion of the dandy mark is colored darker than the other portions by the coloring agent. 4. The method for producing a checkered pattern paper according to claim 2, wherein the colorant is applied by a size press.