JP2013127134A - Manufacturing method of colored tissue paper and colored tissue paper manufacturing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manufacturing method of colored tissue paper and a colored tissue paper manufacturing apparatus which enables coloring with stable tone of color and can prevent disposal and replacement of white water by preventing unintended contamination of the white water with dyes.SOLUTION: A manufacturing method of colored tissue paper comprises: a first process of compounding a first pulp material which is not colored and a second pulp material colored with any dye in white water to form paper stuff; a second process of spouting out the paper stuff from an inlet and putting the paper stuff on a wire cloth of conveyance means; a third process of dehydrating white water included in the paper stuff on the wire cloth; and a fourth process of drying the dehydrated paper stuff to form colored tissue paper. The first process includes processes of providing the first pulp material and the second pulp material together with the white water into paper stuff disaggregation means to disaggregate the first pulp material to uncolored fiber and disaggregate the second pulp material to colored fiber, and compounding the uncolored fiber and the colored fiber to produce paper stuff with a required tone of color.

Description

  The present invention relates to a colored thin paper manufacturing method and a colored thin paper manufacturing apparatus for manufacturing a colored thin paper using white water.

For example, when coloring a desired color on thin paper such as toilet paper, tissue paper, towel paper, etc., in general, in the paper making process, the dye is sprayed while the paper material is thinly formed and dehydrated and dried. ing.
A white water pit is disposed below the apparatus for dehydrating and drying the paper, and the white water dripping when the paper being dehydrated and dried passes through a roller or the like is collected and stored. When the dye is sprayed during dehydration and drying, a part of the sprayed dye is mixed in the white water dripped into the white water pit. Since the white water stored in the white water pit is used in the paper making process in which the stock is sequentially added, unintentional coloring occurs when the dye is mixed into the circulating white water.

  Since the dye mixed as described above becomes uneven color and blotch on the dried paper surface, white water mixed with the dye is discarded or replaced when the thin paper is manufactured as a product. In other words, when coloring by spraying a dye, the frequency of discarding and replacing white water must be increased in order to maintain the finished quality of the thin paper.

In order to prevent the dye from being mixed into the white water, for example, in the method for producing a colored household thin paper described in Japanese Patent No. 3481610, when the thin paper is dried on the surface of the Yankee dryer, a water-soluble polymer and a dye are used. Coloring is carried out by spraying the solution mixed with the oil / fat solution on the surface of the Yankee dryer.
The above-mentioned water-soluble polymer and oil / fat solution mixed with the dye has a coating action, suppresses the sprayed dye from dripping from the surface of the Yankee dryer, and the white water disposed below the Yankee dryer etc. The dye is prevented from entering the white water stored in the pit.

Japanese Patent No. 3481610

Since conventional colored thin paper is manufactured as described above, white water and paper stock are mixed to form the stock thin, and when thin paper is produced through the dehydration drying step, coloring is performed in the dehydration drying step. If it does, excess dye will dripped in white water, and the dye sprayed for coloring will scatter and will mix in white water. When a new paper is added to the white water to produce a thin paper, there is a problem that coloring or unevenness of colors different from the intended color occurs.
In addition, in order to prevent the occurrence of coloring and color unevenness different from the intended ones, if the frequency of discarding and replacing white water mixed with the dye is increased, the color tone is reduced when the white water colored by the dye is discarded. There is a problem in that the production cost is increased because the treatment and the treatment for decomposing the organic substances contained in the waste liquid are required.

  Even when the coating agent is mixed with the dye and sprayed, in the dehydration drying process, for example, a slight amount of the dye is dropped from the surface of the Yankee dryer and mixed into the white water. In addition, dyes scattered by spraying may adhere to each part of the device or may be mixed in white water that falls and stays in the white water pits. Since unevenness occurs, there is a problem in that white water is discarded and replaced in order to reliably prevent such a situation.

  The present invention has been made in order to solve the above-mentioned problems, and enables coloring with a stable color, and can prevent white water from being unintentionally mixed and prevent waste water from being replaced. An object of the present invention is to provide a thin paper manufacturing method and a colored thin paper manufacturing apparatus.

  The method for producing a colored thin paper according to the present invention includes a first step of mixing a first pulp material that is not colored and a second pulp material that is colored with an arbitrary dye with white water to generate a stock, and the stock A second step of ejecting the water from the inlet and placing it on the plow net of the conveying means; and a third step of dropping the white water contained in the stock placed on the plow net into a white water pit disposed below the plow net and dehydrating third. And a fourth step in which the conveying means transports the dehydrated paper material to a drying means and dries to produce colored thin paper, wherein the first step comprises the first pulp material and the The second pulp material is supplied to the paper material disaggregation means together with the white water stored in the white water pit, and the first pulp material is disaggregated into uncolored fibers in the white water by the paper material disaggregation means. Fiber colored second pulp material A and a step of macerating, and a step of generating a stock having any hue by mixing the is the colored fibers not colored fibers, it is characterized.

  Further, in the first step, the supply amount control means may supply the first pulp material and the second pulp material so that the colored thin paper produced in the fourth step has a desired color. And a step of controlling the above.

  Further, the step of controlling the supply amount of the first pulp material and the supply amount of the second pulp material by the supply amount control means detects a color tone of the colored thin paper generated in the fourth step by a color sensor. The supply amount control means includes a step of increasing or decreasing the supply amount of the first pulp material and the supply amount of the second pulp material, respectively, according to the detection value of the color sensor.

  In the first step, the colored thin paper produced in the fourth step has a desired color, and the respective amounts of the first pulp material and the second pulp material are supplied to a seed box and mixed. And the pulp material which mixed the said 1st pulp material and the said 2nd pulp material is supplied to the said paper material disaggregation means from the said seed box, It is characterized by the above-mentioned.

  Further, the second pulp material is composed of a plurality of kinds of pulp materials colored in different colors.

  The colored thin paper manufacturing apparatus according to the present invention includes a first pulp material supply unit that stores a first pulp material that is not colored, and a second pulp material supply unit that stores a second pulp material colored with an arbitrary dye. A paper material disaggregation unit that disaggregates the first pulp material supplied from the first pulp material supply unit and the second pulp material supplied from the second pulp material supply unit into a fibrous form to generate a paper material. A supply amount control unit for controlling the supply amount of the first pulp material from the first pulp material supply unit and the supply amount of the second pulp material from the second pulp material supply unit, respectively, and annularly A transport unit that transports the colored stock using the arranged screen, an inlet that jets the stock generated in the stock disaggregation unit onto the top of the transport net of the transport unit, and the screen Or the stock placed on the plow A white water pit that stores dripped white water; and a drying unit that dries the paper material transported by the transport unit to generate a colored thin paper, wherein the paper material disaggregation unit includes the first pulp material and the first paper material. 2 pulp material and white water supplied from the white water pit are mixed to disaggregate the first pulp material into uncolored fibers in the white water and disaggregate the second pulp material into colored fibers, The non-colored fiber and the colored fiber are mixed to generate the paper material having an arbitrary color, and the supply amount control unit detects the color of the colored thin paper dried by the drying unit The supply amount of the first pulp material and the supply amount of the second pulp material are respectively adjusted according to the detection value of the color sensor.

  According to the present invention, it is possible to prevent the dye from being mixed into the white water and adhering to the colored thin paper manufacturing apparatus, and it is possible to prevent unintentional coloring and color unevenness. In addition, it is possible to suppress the replacement of white water.

It is explanatory drawing which shows the structure of the colored thin paper manufacturing apparatus using the manufacturing method of the colored thin paper by Example 1 of this invention. It is a flowchart which shows operation | movement of the colored thin paper manufacturing apparatus of FIG. It is explanatory drawing which shows the structure of the colored thin paper manufacturing apparatus using the manufacturing method of the colored thin paper by Example 2 of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

Example 1
FIG. 1 is an explanatory view showing the configuration of a colored thin paper manufacturing apparatus using the colored thin paper manufacturing method according to Embodiment 1 of the present invention. This figure shows a schematic configuration of the paper making apparatus 1 constituting the colored thin paper manufacturing apparatus, and illustration of a pulp preparation apparatus, a drying apparatus, a pressing apparatus, and the like is omitted.

The papermaking apparatus 1 includes a white water pit 11 that stores white water, a paper material disaggregation unit that includes a pump that supplies pulp material supplied from pulp material supply units 20 and 21 described later and white water from the white water pit 11 at a predetermined pressure. 12, a screen unit 14 for filtering out impurities from the mixed solution of white and white water sent out from the paper material disaggregation unit 12, a paper unit included in the mixed solution passing through the screen unit 14 An inlet 15 to be supplied to the net 17 is provided.
Further, the paper making apparatus 1 presses the paper net 17 placed so as to circulate through a plurality of rollers 16 including a driving roller, and the paper material placed on the net 17 from the vertical direction of the net 17. A plurality of press rollers 18 are provided.
Also, pulp material supply units 20 and 21 that supply different pulp materials to the paper material disaggregation unit 12, the amount of pulp material delivered from the pulp material supply unit 20, and the pulp material delivered from the pulp material supply unit 21 A supply amount control unit 22 that individually controls the amount and a color sensor 23 that detects the color tone of the paper or thin paper are provided.

The pulp material supply units 20 and 21 store different pulp materials, respectively, and are configured so that the stored amount of pulp material is changed according to the control operation of the supply amount control unit 22. The pulp material stored in the pulp material supply unit 20, 21 is, for example, finely pulverized, and the pulp material stored in one of the pulp material supply units 20, 21 is uncolored and the other The stored pulp material is previously colored in an arbitrary color using a dye. In addition, you may use what gave the bleaching process as said uncolored pulp material.
The supply amount control unit 22 inputs a detection signal of a color sensor 23 installed as will be described later, and sets the amount of pulp material to be sent from the pulp material supply units 20 and 21 according to the color tone indicated by this signal. The pulp material supply units 20 and 21 are connected and configured to control the operation of a delivery mechanism unit (not shown) provided in the pulp material supply units 20 and 21 so that the set amount is delivered.
The color sensor 23 is installed on the carry-out side of the drying device so as to detect the color tone of the thin paper that has passed through the drying device (not shown), for example, the color density.

  The white water pit 11 is arranged on the lower side of the paper making apparatus 1 and has an open upper end so as to collect white water dripping from the paper material conveyed by the plow net 17 of the conveyance unit. It has a capacity capable of storing a predetermined amount of white water including those. Further, the white water pit 11 includes a drainage unit that discards the stored white water to the outside as indicated by a broken arrow B in the figure, and a circulation sending unit that sends the stored white water to the paper material disaggregation unit 12. 11a. Moreover, the piping connected to the white water pit 11 or the circulation delivery part 11a is provided with a water supply unit (not shown) for supplying new white water.

The paper material disaggregation unit 12 includes, for example, a pump that performs a discharge operation at a constant pressure regardless of the flow rate, and the uncolored pulp material that is sent from the pulp material supply unit 20 and the pulp material supply unit 21 that sends it out. The colored pulp material to be used and the white water sent from the circulation sending part 11a of the white water pit 11 are introduced and mixed by applying pressure to these via the conveying pipe 13a, the screen part 14 and the conveying pipe 13b. It is connected and configured to send to the inlet 15.
The inlet 15 ejects the paper delivered from the paper material disaggregation unit 12 together with white water so as to be placed thinly on the upper surface of the perforated net 17 moving along the conveyance path using a drive unit (not shown) as a power source. The felt material (not shown) is placed from above the paper material thinly placed on the upper surface of the plow net 17. The felt material absorbs the moisture of the paper material placed on the screen 17 and is appropriately removed from the upper surface of the screen 17.

  The pavement net 17 is configured by connecting a wire mesh formed in a ring shape in a ring shape, and when disposed in a ring shape in the colored thin paper manufacturing apparatus, the roller 16 is installed at a position mainly inside the ring shape. Is supported by. The roller 16 is, for example, arranged so that the annular upper end portion of the scissors 17 moves horizontally by a predetermined distance, and drives the scissors 17 in the clockwise direction in the figure by a driving roller connected to the above-described driving unit. It is configured as follows. These rollers 16, the perforated nets 17, the drive unit described above, and the like constitute a paper conveyance unit.

The aforementioned inlet 15 is arranged on the left end side of the part where the plow net 17 moves horizontally, and at this position, the inlet 15 is installed so as to eject paper together with white water on the top face of the plow net 17.
Two press rollers 18 are arranged in the vertical direction on the right end side of the screen 17 in the figure, and the paper material placed on the upper surface of the screen 17 is sandwiched between the two press rollers 18. It is provided as follows. FIG. 1 shows two sets, that is, four press rollers 18, but a typical thin paper manufacturing apparatus includes about 3 to 4 sets.

  A drying device (not shown) is provided behind the press roller 18, that is, at the conveyance destination of the paper material that has passed through the press roller 18. Further, behind the drying device, there are provided devices for forming a thin continuous paper sheet in a strip shape in any manner such as tissue paper, toilet paper roll, and dust paper. Further, the plow net 17 constituting the above-described transport unit and the rollers 16 for operating the plow net 17 are mounted on the plow net 17 up to the positions of the drying device (not shown) and the respective devices arranged behind it. It is arranged and configured to convey the stock or thin paper that is being transported.

Next, the operation will be described.
FIG. 2 is a flowchart showing the operation of the colored thin paper manufacturing apparatus of FIG.
The pulp material used in the colored thin paper manufacturing apparatus shown in FIG. 1 is prepared so as to produce thin paper as described above. Further, the pulp material that is not colored with a dye and the desired color with an arbitrary dye are used. These pulp materials are produced using a pulp material adjusting device or the like that is not shown.
The pulp material supply unit 20 stores, for example, a pulp material that has not been colored. Moreover, the pulp material supply part 21 stores the pulp material colored with the dye.
Each pulp material stored in the pulp material supply unit 20 and the pulp material supply unit 21 is a kind of pulp material capable of forming a desired paper-like thin paper, and includes various types of used paper, paper waste materials, pulp waste materials, and the like. The generated pulp material may be used.

  When each pulp material stored in the pulp material supply unit 20 and the pulp material supply unit 21 is sent out, the amount determined by the supply amount control unit 22 as mentioned above is sent out. In the supply amount control unit 22, for example, the amount of each pulp material to be sent from the pulp material supply units 20 and 21 per unit time is set as a default value in advance. This set amount is obtained by calculating a ratio at which a desired color tone is obtained when an uncolored pulp material and a colored pulp material are mixed, or by manufacturing an actually colored thin paper. The supply amount control unit 22 sets the set amount of the default value as an initial value of the supply amount from each pulp supply unit 20 or 21 (step S101), for example, the sending mechanism unit of each pulp material supply unit 20 or 21. Is controlled to feed the pulp material of the above-mentioned supply amount to the paper material disaggregation unit 12.

When the paper material disaggregation unit 12 is operated in accordance with a control instruction from a control unit (not shown) of the colored thin paper manufacturing apparatus, the above-mentioned supply amounts of uncolored pulp material and colored pulp material are supplied. White water is supplied from the pit 11 (step S102).
The operated paper stock disaggregation unit 12 sucks each pulp material and white water, mixes them while applying pressure, and sends them to the transport pipe 13a. Each pulp material introduced into the paper material disaggregation part 12 is mixed with white water and disaggregated into a fibrous form by applying pressure. Furthermore, the colored pulp material and the non-colored pulp material that are separated into fibers in white water are mixed, that is, the uncolored fiber and the colored fiber are mixed to have an arbitrary color. Paper stock is generated (step S103).
In addition to the above-described pulp materials and white water, for example, an antibacterial agent or an additive for adjusting the thin paper to neutrality is introduced into the paper material disaggregation unit 12.

When a pulp material that has been subjected only to bleaching treatment and a colored pulp material are mixed, a paper material having a lighter color than that of the colored pulp material is generated. Further, when a pulp material having a color of raw material not subjected to bleaching treatment and the like and a pulp material colored with a dye are mixed, a paper material having a color obtained by mixing these colors is generated.
The paper having the above-mentioned color moves in the transport pipe 13a in a state of being mixed with white water, and is introduced into the screen unit 14 to filter out substances that become impurities during paper making and are sent to the transport pipe 13b. .

The inlet 15 spouts the white water and the mixed material of the paper material sent via the transport pipe 13b onto the upper surface of the plow net 17 that is moving at a constant speed, and is preferably included in the above-mentioned mixed solution. The stock is thin and has a uniform thickness and is ejected so as to be placed on the upper surface of the perforated net 17 (step S104).
The white water contained in the paper placed thinly on the plow net 17 is dripped from the bottom side of the plow net 17 as indicated by the broken arrow A shown in FIG. Then, the paper material sucked by the felt material and having the above-described color is dehydrated (step S105).
As described above, after dehydration is performed from the material placed on the upper surface of the squish net 17, the material on the upper surface of the squish net 17 passes between the press rollers 18 and the position where the drying device is disposed. Then, the drying process is performed (step S106), and the dried thin paper is transported to an apparatus for forming it in a desired form to be finished in a product state.

For example, after performing the drying process by the above-described drying apparatus, the color density of the colored thin paper generated using the color sensor 23 arranged on the sending side of the drying apparatus is detected, and the detected value is used as the supply amount control unit. 22 is input. The supply amount control unit 22 determines whether or not the input detection value of the color sensor 23 is appropriate (step S107).
Since the color density of the thin paper is preferably detected in a dry state, the position where the color sensor 23 is installed can be any position as long as the color density of the thin paper subjected to the drying process can be detected. The color sensor 23 may be installed at the position.
In addition, for example, the color sensor 23 is installed on the paper carry-in side of the drying device, that is, configured to detect the color density of the paper thinly formed with white water or the thin paper before drying. The amount control unit 22 may appropriately correct the detection value input from the color sensor 23 and perform the determination in step S107.

When the supply amount control unit 22 determines that the color density is not appropriate in the process of step S107, the supply amount control unit 22 returns to the process of step S101, and the detected value of the color sensor 23 used for the determination indicates that the color density is high. The supply amount of the uncolored pulp material is set higher than before, and the supply amount of the colored pulp material is set lower than before.
When it is determined that the color density is not appropriate, the detected value used for the determination indicates that the color density is low. Is set to decrease, and the supply amount of the colored pulp material is set to increase more than before.
The supply amount control unit 22 supplies pulp materials from the pulp material supply units 20 and 21 based on the setting values changed as described above (step S102), and the colored thin paper manufacturing apparatus performs the above-described step S102 and subsequent steps. It operates to repeat each process.

If it is determined in step S107 that the color density is appropriate, the process returns to step S102, and the colored thin paper manufacturing apparatus operates to repeat each step after step S102.
The processing operation described here is for the color sensor 23 to detect color shading. For example, the color sensor 23 for detecting hue, lightness, and saturation is used, and the supply amount control unit 22 is configured as described above. It is configured so that the strength, brightness, and saturation of the hue, lightness, and saturation are determined, and the color tone of the produced thin paper is confirmed, and the supply amount of the uncolored pulp material and the supply amount of the colored pulp material The colored thin paper manufacturing apparatus may be operated so that the generated thin paper has a desired color tone.

As described above, according to the colored thin paper manufacturing apparatus using the colored thin paper manufacturing method of Example 1, the pulp material that is not colored with white water and the pulp material that is colored with the dye are disaggregated into a fiber state. Fiber is mixed to produce a stock, and this stock is dehydrated and dried to produce colored thin paper, so that no dye is used after the paper making process, preventing the dye from being mixed into white water. In addition, it is possible to prevent the dye from scattering and adhering to each part of the papermaking apparatus.
Therefore, unintentional dye contamination can be avoided in white water and paper materials used in the paper making process, and after producing thin paper that is colored in one color, white paper is not washed. It is possible to produce thin papers that are colored in other colors without being discarded.

Further, since it is possible to prevent the dye from being mixed into the white water, the frequency of white water waste replacement can be suppressed, and the cost required for the white water waste treatment can be suppressed.
In addition, the non-colored pulp material and the colored paper material are disaggregated into a fibrous form, and these non-colored fibers and colored fibers are mixed together, resulting in the occurrence of uneven color and color bleeding. It is possible to produce a colored thin paper having a desired color while suppressing the above.
In addition, since the occurrence of color unevenness and the like can be suppressed as described above, it is possible to generate a thin paper with a particularly light hue with stable quality.
Also, since the amount of uncolored pulp material and the amount of colored pulp material are adjusted and mixed, the color of the thin paper can be adjusted appropriately at the manufacturing stage, and it is particularly colored in a light color In this case, the desired color tone can be easily adjusted.

(Example 2)
FIG. 3 is an explanatory view showing a configuration of a thin paper manufacturing apparatus using a colored thin paper manufacturing method according to Embodiment 2 of the present invention. The same reference numerals are used for the same or corresponding parts as shown in FIG.

The paper machine 1a of FIG. 3 includes the white water pit 11, the paper material disaggregation part 12, the screen part 14, the inlet 15, the roller 16, the plow net 17, the press roller 18 and the like shown in FIG. ing. The paper making apparatus 1a does not include the supply amount control unit 22 and the color sensor 23 shown in FIG.
Further, the paper making apparatus 1a includes pulp material supply units 20a and 21a corresponding to the pulp material supply units 20 and 21 of FIG. 1, and further stores pulp materials sent from these pulp material supply units 20a and 21a, respectively. A seed box 30 is provided.
3 introduces the pulp material delivered from the seed box 30 and the white water delivered from the circulation delivery part 11a of the white water pit 11, and applies pressure to these to mix them to convey the pipe 13a. In addition, it is configured so as to be sent to the inlet 15 through the screen unit 14 and the transport pipe 13b.

Next, the operation will be described.
Here, redundant description of the same operation as that of the paper making apparatus 1 described above is omitted.
In the pulp material supply units 20a and 21a, the uncolored pulp material stored in the pulp material supply units 20 and 21 shown in FIG. 1 and the same pulp material colored in advance with a dye are stored, respectively. . For example, an uncolored pulp material is stored in the pulp material supply unit 20a, and a colored pulp material is stored in the pulp material supply unit 21a.

Each of the pulp material supply unit 20a and the pulp material supply unit 21a includes a delivery mechanism unit that controls the amount of the pulp material to be delivered by itself, and the amount of the pulp material to be supplied to the seed box 30 by adjusting this mechanism unit in advance. Are set appropriately.
When the pulp material is supplied from the pulp material supply units 20a and 21a, the seed box 30 stirs the uncolored pulp material stored and the colored pulp material, for example, using a mixing mechanism unit (not shown). .

When the paper material disaggregation unit 12 is activated, the seed box 30 sends the stored pulp material to the paper material disaggregation unit 12. Specifically, the pulp material is sucked from the seed box 30 and the white water is sucked from the white water pit 11 by operating the pump of the stock disaggregation unit 12.
The paper material disaggregation unit 12 mixes and feeds the introduced pulp material and white water to the transport pipe 13a while applying pressure to the pulp material and white water. At this time, since the pulp material introduced from the seed box 30 is a mixture of the above-mentioned uncolored pulp material and the colored pulp material, these pulp materials disaggregate into a fibrous form in white water. The uncolored fiber and the colored fiber are mixed to produce a paper stock of an arbitrary color.
The mixed liquid of the stock and white water sent out from the stock disaggregation unit 12 is sent to the inlet 15 through the screen unit 14 and the transport pipe 13b in the same manner as the paper making apparatus 1 described above. 2, that is, the processing operations in steps S103 to S106 shown in the flowchart of FIG. 2 are performed, and the dried colored thin paper is generated by a drying device (not shown). The

Here, when the dried colored thin paper does not have a desired color, the mixing amount of the uncolored pulp material and the colored pulp material is adjusted.
Specifically, according to the color of the colored thin paper produced previously, the supply mechanism of the pulp material supply unit 20a is adjusted to appropriately increase or decrease the supply amount of the uncolored pulp material, and supply the pulp material The supply mechanism of the part 21a is adjusted to appropriately increase or decrease the supply amount of the colored pulp material, and the colored thin paper is generated through the above-described processes.

As mentioned above, according to the colored thin paper manufacturing apparatus using the manufacturing method of the colored thin paper of Example 2, the pulp material which is not colored with white water and the colored pulp material are mixed and disaggregated into fibers, respectively. A paper stock is produced by mixing the fibers of this material, and this paper stock is dehydrated and dried to produce colored thin paper, so that no dye is used in the paper making process, preventing the dye from being mixed into white water. In addition, the dye can be prevented from scattering and adhering to each part of the papermaking apparatus.
Therefore, it is possible to avoid unintentional dye contamination in the white water used for circulation and the paper materials used in the paper making process, and after manufacturing the thin paper that is colored in one color, the paper making device is washed. In addition, it becomes possible to manufacture thin paper that is colored in another color without discarding and replacing white water.

Further, since it is possible to prevent the dye from being mixed into the white water, the frequency of white water waste replacement can be suppressed, and the cost required for the white water waste treatment can be suppressed.
Further, since the uncolored pulp material and the colored pulp material are disaggregated into a fibrous form and these fibers are mixed, a colored thin paper with suppressed color unevenness can be generated.
Further, since the occurrence of color unevenness can be suppressed as described above, a light-colored thin paper can be generated with stable quality.
Also, since the amount of uncolored pulp material and the amount of colored pulp material are adjusted and mixed, the color of the thin paper can be adjusted appropriately at the manufacturing stage, and it is particularly colored in a light color In this case, the color density can be easily adjusted as desired.

  In addition, an appropriate amount is supplied to the seed box from the pulp material supply unit storing the uncolored pulp material and the pulp material supply unit storing the colored pulp material, and mixed from the seed box. Since the pulp material is supplied to the paper material disaggregation part, the paper material disaggregation part provided with one pulp material introduction path can be used, in other words, an inexpensive paper material disaggregation part can be used. it can. In addition, the maintenance of the paper material disaggregation unit is simplified, and the maintenance cost and the like can be suppressed.

  In Example 1 and Example 2 described above, a colored thin paper is manufactured using an uncolored pulp material and a colored pulp material, but the colored pulp materials are colored in different colors. A plurality of different pulp materials may be prepared, and these may be separated into a fiber state together with the above-mentioned uncolored pulp material, and a thin paper having a desired color may be generated by mixing these fibers.

DESCRIPTION OF SYMBOLS 1 Paper machine 11 White water pit 12 Paper material disaggregation part 13a, 13b Conveyance pipe 14 Screen part 15 Inlet 16 roller 17 Plow net 18 Press roller 20, 20a, 21, 21a Pulp material supply part 22 Supply amount control part 23 Color sensor 30 types box

Claims (6)

A first step of producing a stock by mixing uncolored first pulp material and a second pulp material colored with an optional dye into white water;
A second step of ejecting the stock from the inlet and placing it on the plow net of the conveying means;
A third step of dropping the white water contained in the stock placed on the plow net into a white water pit disposed below the plow net and dehydrating;
A fourth step in which the transporting means transports the dehydrated stock to a drying means and dries to produce colored thin paper; and
Have
The first step includes
The first pulp material and the second pulp material are supplied to the paper material disaggregation means together with the white water stored in the white water pit, and the first pulp material is colored in the white water by the paper material disaggregation means. Disaggregating into non-fibers and disaggregating the second pulp material into colored fibers;
Mixing the uncolored fibers and the colored fibers to produce a stock having an arbitrary hue;
including,
A method for producing a colored thin paper. The first step includes
The supply amount control means includes a step of controlling the supply amount of the first pulp material and the supply amount of the second pulp material so that the colored thin paper generated in the fourth step has a desired hue.
The method for producing a colored thin paper according to claim 1. The step of the supply amount control means controlling the supply amount of the first pulp material and the supply amount of the second pulp material,
Detecting the hue of the colored thin paper generated in the fourth step by a color sensor;
The supply amount control means includes a step of increasing or decreasing the supply amount of the first pulp material and the supply amount of the second pulp material, respectively, according to the detection value of the color sensor.
The manufacturing method of the colored thin paper of Claim 2 characterized by the above-mentioned. The first step includes
The colored thin paper produced in the fourth step has a desired color, and the respective amounts of the first pulp material and the second pulp material are supplied to a seed box and mixed, and the first pulp material and Supplying the pulp material mixed with the second pulp material from the seed box to the paper material disaggregation means;
The method for producing a colored thin paper according to claim 1. The second pulp material comprises a plurality of types of pulp materials colored in different colors.
The manufacturing method of the colored thin paper of any one of Claim 1 to 4 characterized by the above-mentioned. A first pulp material supply section for storing a first pulp material that is not colored;
A second pulp material supply section for storing a second pulp material colored with an arbitrary dye;
A paper material disaggregation unit that disaggregates the first pulp material supplied from the first pulp material supply unit and the second pulp material supplied from the second pulp material supply unit into a fibrous form to generate a paper material; ,
A supply amount control unit for controlling the supply amount of the first pulp material from the first pulp material supply unit and the supply amount of the second pulp material from the second pulp material supply unit;
A transport unit for transporting the colored paper stock using a plaid net arranged in a ring;
An inlet for ejecting the stock generated in the stock disaggregation unit to the upper surface of the plow net of the transport unit;
A white water pit that is disposed below the plow net and stores white water dripped from the stock placed on the plow net;
A drying unit that dries the paper stock transported by the transport unit to produce colored thin paper;
With
The paper material disaggregation part is
The first pulp material, the second pulp material, and white water supplied from the white water pit are mixed to disaggregate the first pulp material into uncolored fibers in the white water, and the second pulp material. Disaggregating into colored fibers, mixing the uncolored fibers and the colored fibers to produce the stock having an arbitrary color,
The supply amount control unit
According to the detection value of the color sensor that detects the hue of the colored thin paper dried by the drying unit, the supply amount of the first pulp material and the supply amount of the second pulp material are respectively adjusted.
An apparatus for producing colored thin paper characterized by the above.

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