JP2000192390A - Production of paper for label, paper machine and paper for label and label thus produced - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a label with fluffs (selvedge fringe) on the peripheral edge and a waterdrop pattern on the surface, to obtain a paper for such label, having folkcraft-fashioned appearance, capable of mechanical making, high in air permeability, and printable through automatic feed, to provide a method for producing such paper, and to provide a paper machine therefor. SOLUTION: The label and paper for such label are obtained by the following process: water or pulp liquor is continuously dripped on pulp liquor or wet paper continuously fed on a belt-shaped wire cloth 1 to form a waterdrop pattern, and paper fibers in a 2nd stock tank 4 are put to papermaking together in a multi-rectangular fashion using a circular net 3 furnished with a grid frame 22 on the downstream side of the papermaking direction of the belt-shaped wire cloth to form a thin selvedge grid which, in turn, is dehydrated and dried, the aimed paper thus obtained is torn off along the selvedge grid; a waterdrop pattern of many craters is thus formed on the surface of the paper and the reverse face is afforded with a chequered pattern having a thin paper fiber layer and a thick layer divided by the chequered pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a label which is particularly suitable for printing letters and patterns and affixing it to a bottle of sake or wine, etc. The present invention relates to a method for producing label paper having a waterdrop pattern on its surface, a paper machine for carrying out the method, and label paper and labels obtained by the method.

[0002]

2. Description of the Related Art In recent years, in the industry of luxury goods such as sake and wine, a label (sometimes called a label) having a handmade folk art-like appearance has been favored since conventional paper has been completely devoted. Have been. The appearance of a Japanese paper label meets these demands, giving a handmade warmth not found in Western paper. In particular, labels that have long fluffy fluff on the cut end (outer peripheral edge) of the label and that have a crater-like pattern on the surface of the paper layer (which is called a “water-fall pattern” in the papermaking industry) have been prized. The fluffy cut is 1-5
It can be obtained by tearing paper containing paper fibers of 0 mm, but a label having a regular shape such as a rectangle or an ellipse cannot be obtained. In order to obtain a regular shape, an "ear lattice" (a lattice or lattice pattern formed by arranging tissues that have easily broken paper in a line) corresponding to the shape is formed at the time of papermaking. By cutting the Japanese paper having the ear lattice along the lattice by a tear-off operation, a well-shaped label having fluff on the periphery can be obtained. The waterfall pattern is such that when water drops are dropped on paper fibers in papermaking, the paper fibers are scattered in a crater shape, and a unique and warm appearance is obtained.

[0003] Japanese paper having such an ear lattice and a falling water pattern has been produced as hand-made Japanese paper. Since most of the manufacturing methods are manually performed, the production amount is limited, and thus it is not suitable for labels that require mass production. In addition, the hand-making process is a method of allowing water to pass through a net by natural fall, so that it is necessary to roughen the paper fiber, and there is a restriction that only paper having low air permeability can be obtained. In addition, the air permeability described in this specification is
Gurley test method specified in JIS P-8117 is 10
It is the number of seconds for 0 cc of air to pass through the paper piece, and in this specification, unless otherwise noted, it is shown as the number of seconds measured for five sheets.

For this reason, in a suction pad paper feeder of an offset printing press widely used as a label, such a Japanese paper having low air permeability causes an air bleeding phenomenon in a suction process, and the paper is fed by the paper feeder. There was a problem that could not be done. Therefore, the method of printing hand-made Japanese paper with a water-drop pattern has been manual work such as screen printing by manual feeding and offset printing by manual feeding. The current state of production of Japanese paper with ear lattices and water drops is in a state of small production at high cost, and production of machine-made paper suitable for general-purpose labels produced in large quantities at low cost was desired, but difficult. And it was. Since the method and the equipment for making the ear lattice and the falling water pattern are completely different, it is considered difficult to make the machine by the machine-making method.There is no example of this kind of washi being practically produced by the machine-making method. There were no examples of successful printing with automatic paper feed of an offset printing press.

According to the present invention, a new structure having a handmade folk art-like appearance can be mass-produced by machine-making, has high air permeability, and can be subjected to offset printing by automatic paper feeding.
It is an object of the present invention to provide a label paper, a method for producing the same, and a paper machine.

[0006]

According to a first aspect of the present invention, there is provided a method for producing a label paper having a water-drop pattern and fluff, comprising a pulp solution containing water supplied continuously onto a belt-shaped netting machine. A water-drop pattern is formed by continuously dropping water or pulp liquid onto the wet paper, and the second raw material tank 4 is formed by a circular mesh 3 having a lattice frame 22 on the downstream side of the belt-shaped net in the paper making direction.
A plurality of rectangular paper fibers are made into a rectangular shape to form an ear lattice having a small thickness, and then the paper obtained by dehydration and drying is torn along the ear lattice.

In a second aspect of the present invention, there is provided a paper machine for label paper having a water-drop pattern and fluff, and a first raw material tank for uniformly developing and supplying a pulp liquid to the belt-shaped net. 2, a water-dropping device 13 disposed above the belt-shaped netting 1 for continuously dropping water or pulp liquid onto the pulp liquid or wet paper on the netting, and a downstream of the belt-shaped netting in the papermaking direction. Wet paper 1 placed on the side and sent out from a belt-shaped net
7 and a second raw material tank 4 for supplying a pulp solution to the circular mesh, and the circular mesh 3 has a lattice frame 22 formed of a thin metal or resin on its outer periphery. It is characterized by having.

[0008] In the label paper according to the third aspect of the present invention, a waterdrop pattern composed of a large number of craters is formed on the front surface, and a grid pattern having a thin paper fiber layer on the back surface and a thick layer partitioned by the grid pattern. Wherein the thick paper layer is formed of paper fibers mixed with the thin paper fiber layer. This label paper is obtained by the method of claim 1 and has an appearance indistinguishable from conventional hand-made ones.
The air permeability is low enough to feed paper by the vacuum head of the printing press.

A label according to a fourth aspect of the present invention is provided with a water-drop pattern composed of a large number of craters and printed characters or patterns on the surface, and a fuzz obtained by tearing a thin paper fiber layer around the periphery. It is characterized by comprising a thick paper fiber layer formed by a paper fiber layer and a paper fiber laminated on the back surface thereof. This label is defined in claim 3
By tearing the label paper along a thin ear lattice and printing the desired characters or patterns on the surface.

[0010] By separately making an ear lattice and a water drop pattern and bonding them together in a wet paper state (hereinafter referred to as "making together"), the machine making method which has been conventionally difficult has been successful. The bonding in the wet paper state does not particularly require an adhesive, and is performed only by the entanglement of the paper fibers between the paper fiber layer having the ear lattice and the wet paper having the water-drop pattern. Therefore, the paper quality and texture are maintained, and continuous papermaking is performed in-line, so that the cost is greatly reduced and the quality is constant.

Each of the raw material tanks 2, 3
The stock solution 4 is circulated by a pump in the direction of the arrow (→). In order to increase the air permeability, the fiber may be pressurized or dried after being pressed by the compression roll 26 to increase the fiber density (calendering effect). The blanket 16 increases the knitting density if necessary, transfers the papermaking, and sends it to the drying drum as a conveyor. The suction box 9 actively sucks and dehydrates wet paper webs containing a large amount of water. The dried paper is continuously wound into a roll by a winding device 29.

Paper raw materials include paper fibers, viscosity adjusting / dispersing agents, coloring agents, extenders, surfactants, water and the like. Paper fibers include mulberry (kozo), mitama (mitsumata), goose (ganpi), hemp,
It is a fibrous material made from bamboo, mulberry, pulp or the like, and is adjusted to a preferable fiber length of 1 to 50 mm with a beater (beating machine) in consideration of the desired paper quality and the papermaking condition (filtration) of the paper machine.
The air permeability can be adjusted by the fiber size. Further, in order to elaborate the decoration, it is possible to enhance the decorative property of the label by scattering chemical fibers, synthetic fibers, gold leaf, thin skin of peanuts, black skin of mulberry, crushed paper or paper, and the like.

The viscosity adjusting and dispersing agents for adjusting drainage and dispersibility include toro, a starch paste, and a chemical paste (eg, styrene butadiene latex, acrylic emulsion polymer, partially or completely saponified polyvinyl alcohol, casein, Polyoxyethylene or a polyoxyethylene derivative). As the coloring agent, natural dyes such as akane and indigo dyes, synthetic dyes, coloring pigments and the like are used for the purpose of giving a soothing appearance or a gorgeous appearance. For the purpose of paper quality adjustment, clay, titanium oxide, calcium carbonate, a sizing agent and the like can also be used. The surfactant is an anionic surfactant, a nonionic surfactant, a cationic surfactant, or the like as an additive, and an antifoaming agent is used as necessary.

The weight of the paper or the thickness of the paper in the wet paper can be adjusted by the fiber concentration of the pulp liquid, the papermaking speed, the amount of pulp liquid falling from a short net, and the like. The concentration of the pulp solution is not limited, but is appropriately selected based on the workability and papermaking quality, usually about 0.2%. To improve the dispersion of paper fibers and the quality of papermaking, add a toro in the case of mulberry fiber (aka kaz) to disperse the paper fiber with appropriate viscosity. The papermaking speed depends on the size of the papermaking machine, the drying capacity and the thickness of the wet paper, but is appropriately selected based on a speed of 10 to 50 m / min. The fibers are dispersed in a crater shape due to the drop pressure of the surface of the wet paper and the scattering of moisture when the water drops fall on the papermaking paper, and a pattern called a crater pattern or a water drop pattern appears on the wet paper.

When the ear sheet portion of the label sheet having the ear grid and the water drop pattern of the present invention obtained as described above is torn off manually or by a machine, as shown in FIG. The pulp fiber becomes fluffy with long bristle feet, and a warm, handcrafted label with a folk art style different from knife cutting can be obtained.

When the paper passes between the mesh 3 and the press roller 19, it is suction-dewatered to form a paper fiber layer containing a small amount of water. You can get Japanese paper. Further, if necessary, the paper fiber layer obtained from the downstream circular mesh may be laminated with the circular mesh 3 and the pressing roller 19 to obtain a machine-made Japanese paper having another function. For example, increasing the air permeability by combining paper fiber layers with a short fiber length to increase the air permeability, calendering the paper after papermaking to increase the air permeability by making the paper fibers dense, etc. The result is a sheet that can be printed at high speeds such as offset printing. With conventional handmade Japanese paper, it has been extremely difficult to increase the air permeability suitable for a sheet-fed offset printing press, for example, to an air permeability of 3.8. In addition, it was difficult to maintain the air permeability at a constant level so as to be suitable for printing by the conventional hand-making method. According to the method for producing label paper of the present invention, such air permeability can be improved and the quality can be maintained at a constant level, and a Japanese paper having an ear lattice and a water-drop pattern can be provided.

The label paper of the present invention can be obtained as a long roll having an appropriate width and an arbitrary length. The obtained roll is cut into sheets on the basis of the ear lattice, and a sheet suitable for a sheet-fed offset printing press is obtained. Labels and labels can be obtained by printing on the obtained paper and separating the ear lattice. The printing method is letterpress printing machine, offset printing (aka planographic printing) machine,
Any sheet-fed printing machine such as an intaglio printing machine or a flexographic printing machine can be used. In the paper feeding method of such a printing machine, a paper is sucked up by a rubber suction pad or a metal suction port.
If the air permeability is low at the time of siphoning, the siphoning of the paper becomes insufficient and it becomes difficult to move the paper, and printing by automatic paper feeding with conventional hand-made Japanese paper was impossible.
In the present invention, since the air permeability is adjusted so as to be suitable for the suction of the paper feeding machine in the machine-making, automatic paper feeding becomes possible. In printing paper feeding, a wind called “air blow” is blown onto the upper portion of the stacked papers at the same time as the suction, so that the upper paper is lifted up, and the effect of preventing “two sheets stacked” is exhibited.
The positions of the suction pad for feeding paper and the air blow are not particularly limited, but are a front position or a rear position in the traveling direction of the stacked sheets, and are preferably front positions in the traveling direction because the sheets are easily broken by the ear lattice. It is.

The printing speed depends on the type and capacity of the printing press and the properties of the paper, but printing at a speed of 3,000 to 20,000 sheets per hour is possible. Multicolor printing of 7 colors is also possible. Such a speed is remarkably higher than the conventional manual paper feed rate of 100 to 2,000 sheets per hour. In addition, compared to the conventional method of manually performing single-color printing by manual paper feeding to produce multiple colors, the method of the present invention exhibits remarkably high productivity.
In particular, the label paper of the present invention has high productivity, can be printed at high speed, and is advantageous in terms of cost as a label printed in large quantities for favorite items such as sake, wine, confectionery and other foods.

[0019]

1 to 6 show one embodiment of a paper machine according to the present invention. The paper machine of the present embodiment has a relatively short belt-shaped netting (the paper machine of Western paper has a long belt-shaped netting, which is usually referred to as a long net. The netting is hereinafter referred to as “short net” and a cylindrical netting (usually referred to as “circular net”). Paper fiber liquid such as mulberry or pulp liquid is supplied to the short net 1 from the first raw material tank 2 or the water falling device, and pulp liquid or the like is supplied to the circular net 3 from the second raw material tank 4. The short net 1 is suspended between a breast roller 5 and a turning roller 6, and includes a tension roller 7 and an auxiliary roller 8. A suction box 9 for forcibly absorbing water from the pulp liquid spread on the short net is arranged below the short net forming the papermaking line.

FIG. 2 shows the structure of the portion for supplying the paper fiber liquid from the first raw material tank 2 onto the short net 1. The paper fiber liquid flows in the flow tank 11, and the paper fibers are entangled by the turbulence generated during the flow and spread in the width direction of the paper, so that the paper fibers are placed on the short net 1 from between the breast roller 5 and the rectifying roller 12. Expanded and sent. The pulp liquid spread on the short net is dehydrated by gravity, and water is forcibly sucked in the suction box to become wet paper having a water content of about 75%.

A water-dropping device 13 is disposed at an appropriate position above the short net 1. The water dropping device 13 is provided with a pipe 14 and a number of water dropping nozzles 15 attached thereto, as shown in FIG. 3, and supplies water or paper fiber liquid to the pipe 14,
By dropping it from the water drop nozzle 15 onto the paper fiber liquid or wet paper spread on the short net, a water drop pattern composed of a large number of craters is formed on the wet paper. A belt-like blanket 16 is attached from above to the wet paper at the downstream side of the water dropping device, and the wet paper 17 is carried downstream with the wet paper 17 attached to the lower surface of the blanket.

The second raw material tank 4 and the circular net 3 are disposed immediately downstream of the short net 1. In the embodiment shown in the figure, two second raw material tanks 4 and two circular nets 3 are arranged, and the two circular nets are synchronously rotated in phase. The detailed structure of this part is shown in FIG.
Is shown in In FIG. 4, a paper fiber liquid such as pulp in the second raw material tank 4 is guided around the circular net 3 through the flow tank 18. The paper fiber layer formed by the circular net 3 is pressed against the lower surface of the wet paper web 17 sent out from the short net 7 between the press roller 19 and the paper fiber layer to be mixed. Circular net 3
A lattice frame 22 formed of a thin stainless steel plate or a metal or resin or the like is attached to the outer periphery of the net 21.
Only a small amount of the pulp liquid in the second raw material tank adheres to the portion of the lattice frame. Therefore, the paper fiber layers formed by the circular mesh are cut together in a state of being divided into a large number of rectangles, and an ear lattice (a lattice forming the ears of the label) is formed between the rectangles. The wet paper 17 having the water-drop pattern formed on the upper surface and the rectangular paper fiber layer formed on the lower surface as described above, orbits upward while being attached to the blanket 16.

The blanket 16 is an endless blanket wound around a plurality of rolls 23... Above the short net 1 and the circular net 3. An auxiliary roller 24 and a suction box 25 are appropriately disposed in the peripheral circuit of the blanket 16, and a compression roller 26 is disposed near the downstream side. The compression roller 26 lightly compresses the wet paper attached and sent to the blanket 16, promotes dewatering, and performs light calendering.

The wet paper web, which has been considerably dehydrated while being wrapped around the blanket 16, separates from the blanket 16 downstream of the compression roller 26, and is sent to a drying drum 28 via an appropriately arranged transfer belt 27. . The drying drum 28 is a drum heated by steam or the like, and the wet paper web is dried while rotating along the peripheral surface of the drying drum 28 in a state where the side on which the water-drop pattern is formed is in contact with the peripheral surface of the drum,
Finally, it is wound by the winding device 29.

On the wound paper, a thin portion (ear lattice) is formed in a grid around a rectangular region which has a thick ground due to the paper fiber layer formed by the circular net 3 attached thereto. In addition, a waterfall pattern composed of a large number of craters is formed on the surface. Due to the small thickness of the ear grid, the paper can be easily torn along the ear grid, and the torn rectangular paper will have fluff around it. The length of the fluff can be adjusted by adjusting the length of the paper fibers contained in the pulp liquid supplied to the first raw material tank 2.

Example 1 Manufacture of machine-made Japanese paper In FIG. 1, short net 1 is equipped with a brass 60 mesh net having a width of 750 mm and a spacing of 2000 mm between the breast roll and the turning roll, one of which is the first mesh. It is connected to the raw material tank 2 (see FIG. 2). The short net had a paper making width of 350 mm and was directly connected to the rectifying roller 12. The water-dropping device 13 installed above the short net is formed of a 20-φ × 750-mm-long tube in which a pump and 50 nozzles are implanted, and water or paper fiber liquid flows from the water-dropping nozzle 15 of the tube connected to the pump. Is dropped on a wet paper web on a short net to make a waterfall pattern appear. Circular net 3
Is a cylindrical mesh drum made of a brass 60 mesh having a diameter of 300 mm (hereinafter abbreviated as 300φ, and the dimension unit is expressed in mm) and a length of 750 mm, and is immersed in the second raw material tank 4 by about ２. The grid frame 22 has a line width of 5 mm and a grid width of 125 mm.
× A grid with a length of 105 mm is arranged in two rows and two rows, and the papermaking width is 35
It is 0 mm and installed in a circular net (see FIGS. 5 and 6). The blanket was 800 mm, and a calender press was installed before the drying drum. The drying drum 28 has a diameter of 2
It is a stainless steel Teflon processing drum having a size of 000 mm and a width of 1000 mm, and is designed so that 150 ° C. steam as a drying heat source enters the inside.

A pure white mulberry pulp solution having a concentration of 0.2% and a paper fiber length of about 5 mm was added with a toro and the viscosity and dispersion were adjusted and supplied to the first raw material tank and the water falling device. A pulp solution obtained by adding pulp colored at 0.2% and having a paper fiber length of about 2 mm in pale yellow and a toro was supplied to the second raw material tank. Paper is made to a dry weight of about 20 grams per square meter with a short net, and a pattern in which paper fibers are dispersed in a crater shape is formed by a water-falling device. Is done. The paper fiber layer was formed on a blanket by making paper with a circular net, and having a dry weight of about 80 g per square meter and having an ear lattice pattern formed thereon, and sent to a press roll 19. The paper was layered on the paper fiber layer of the ear lattice, sent to the compression roller, and lightly pressed by the compression roller 26. The waterdrop layer was dried on the drying drum 28 in contact with the drying drum, and was wound at a speed of 20 meters per minute. The resulting machine-made washi paper had a dry weight of about 100 grams per square meter, an ear lattice thickness of 0.05 mm to 0.1 mm, an air permeability of 4.8, and a white mulberry fiber crater on pale yellow pulp. Dispersed into a shape, width 125mm and length 1
Approximately uniform width 3 with the appearance of Japanese paper with an ear lattice of 05 mm
A long roll of 50 mm was obtained. In the same manner, when the ear lattice was 150 mm wide and 150 mm long, almost the same results were obtained.

Example 2 High-speed printing production The grid width obtained in Example 1 was 125 mm and the length was 105 mm.
Was cut into a sheet having a length of 250 mm and a width of 300 mm so that an ear lattice having two rows and two rows was positioned at the center, to obtain a sheet. A commercially available offset printing press was modified, and a paper feeding device was installed at an interval of 20 mm at the front of the sheet, an air blow device having a diameter of 1 mm, a paper suction device, and an air blow device at the rear of the sheet. The air blow and the suction device were adjusted, and three-color continuous printing was performed at a printing speed of 6,000 sheets per hour. Monochrome continuous printing was performed at a printing speed of 4000 sheets per hour in the same manner using the obtained long roll having a grid width of 150 mm and a length of 150 mm.

Example 3 Preparation of Label The sheet printing paper obtained in Example 2 was torn off along the ear lattice by hand only without using a blade. The detaching operation along the ear lattice was easy. The separated printed matter has a water-dropped pattern and a fluffy appearance, and is suitable for labels such as sake or wine, which show a unique astringency and handicraft texture of Japanese paper.

[0030]

According to the present invention, it is possible to supply a large amount of low-cost Japanese paper that can be printed at a high speed such as offset printing with a constant quality by machine-made Japanese paper. The label with the ear lattice and the water drop pattern has the same water drop pattern and fluffy cut end appearance as handmade Japanese paper, and a folk art-like warm label can be obtained.

[Brief description of the drawings]

FIG. 1 is a side view of a label paper machine.

FIG. 2 is a perspective view showing a short net and a first raw material tank.

FIG. 3 is a perspective view of a water falling device.

FIG. 4 is a perspective view showing a circular net and a second raw material tank.

FIG. 5 is an enlarged perspective view of a circular net.

FIG. 6 is a perspective view showing a grid frame of a circular mesh;

FIG. 7 is a plan view of a label sheet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Short net 2 First raw material tank 3 Circle net 4 Second raw material tank 13 Dropping device 22 Grid frame

Claims (4)

[Claims] 1. A water-dropping pattern is formed by continuously dropping water or pulp liquid onto a pulp liquid or wet paper containing water which is continuously supplied onto a belt-shaped papermaking net (1), A lattice frame (22) on the downstream side of this belt-shaped net
A paper mesh obtained by forming a thin lattice of ears by mixing the paper fibers of the second raw material tank (4) into a large number of rectangular shapes with a circular mesh (3) provided with A method for producing label paper having a water-drop pattern and fluff, characterized in that the label paper is torn along an ear lattice. 2. A belt-like netting (1) and a first raw material tank (2) for uniformly developing and supplying a pulp liquid to the belt-like netting.
And a water dropping device (13) disposed above the belt-shaped netting (1) and continuously dropping water or pulp liquid onto the pulp liquid or wet paper on the netting, and a belt-shaped netting. Wet paper (1) placed downstream in the papermaking direction and fed from a belt-shaped
7) a circular mesh (3) for making a paper fiber layer, and a second raw material tank (4) for supplying a pulp solution to the circular mesh;
Is a lattice frame (22) formed of thin metal or resin around its periphery
A paper machine for label paper with a waterfall pattern and fluff, characterized by comprising: 3. A paper having a water-drop pattern composed of a large number of craters on its front surface, a lattice pattern having a thin paper fiber layer on its back surface, and a thick paper fiber layer partitioned by the lattice pattern. Label paper, wherein the fiber layer is formed of paper fibers mixed with the thin paper fiber layer. 4. A thin paper fiber layer and a back surface provided with a water-drop pattern composed of a large number of craters and printed characters or patterns on the surface, and a fluff obtained by tearing a thin paper fiber layer around the periphery. 1. A label, comprising a thick paper fiber layer formed from paper fibers mixed together.