JP5833295B2 - Manufacturing method of tissue paper products - Google Patents

Description

  The present invention relates to a method for manufacturing tissue paper products using a multi-stand type interfolder.

Tissue paper boxed products are generally obtained by stacking a plurality of continuous tissue papers by folding them with an interfolder (folding equipment) and cutting them into a predetermined length to obtain a tissue paper bundle. It is manufactured by storing in a storage box (tissue carton).
Examples of such interfolders include multi-stand type (multiple type) interfolders as disclosed in Patent Documents 1 and 2 below, and rotary interfolders as disclosed in Patent Documents 3 and 4 below. It has been known.
The following is a conventional example of a manufacturing method using a multi-stand type interfolder. That is, a primary web roll (generally also called a jumbo roll) is manufactured by making a thin paper in a papermaking facility and winding it. Then, this primary web roll is set on a ply machine, and a plurality of primary webs are produced. The primary continuous sheet fed from the roll is overlapped and wound and slit (divided into a product width of tissue paper or a multiple of the width of the tissue paper in the width direction) to produce a secondary raw roll made of a plurality of plies.
After the secondary roll manufactured by the ply machine is taken out from the ply machine, the necessary number of rolls are set in the multi-stand type interfolder. Next, the secondary continuous sheet is fed out from the secondary web roll and fed to the folding mechanism, where it is stacked while being folded, and then cut into a predetermined length to form a tissue paper bundle, which is stored in a storage box. .
A manufacturing method using such a multi-stand type interfolder has a higher number of folding mechanisms (usually 80 to 100) than a manufacturing method using other folding equipment, and is therefore highly productive. Has advantages.

  By the way, in recent years, there has been an increasing demand for tissue paper products coated with chemicals such as moisturizers and fragrances (usually also referred to as “lotion chemicals”). Various manufacturing methods and equipment have been proposed. In general, tissue paper products containing such a lotion chemical are mainly manufactured by a rotary interfolder (for example, Patent Document 5 below). However, the rotary type interfolder has a drawback in that productivity is low because folding and cutting are simultaneously performed in the direction perpendicular to the processing direction.

US Patent No. 4052048 (Japanese Patent Publication No. 55-1215) JP 2006-240750 A JP 61-37668 A Japanese Patent Laid-Open No. 5-124770 Japanese Patent Application Laid-Open No. 2004-332034 Special table 2008-525103 gazette JP 2008-264564 A JP 2008-245780 A JP 2008-183127 A

Therefore, the present inventors have considered manufacturing tissue paper products to which a chemical solution has been applied by a manufacturing method using a multi-stand type interfolder that is more productive than a rotary interfolder.
However, when manufacturing by a manufacturing method using a multi-stand type interfolder, if a chemical solution application step is provided separately from the ply machine or the multi-stand type interfolder, it takes time and labor to transfer the raw material and a large equipment cost. There is a problem. Further, when the chemical solution application step is provided in the multi-stand type interfolder, it is necessary to separately provide a line for manufacturing a tissue paper product to which a chemical solution is applied and a line for manufacturing a tissue paper product to which no chemical solution is applied.

  Therefore, the main problem of the present invention is to manufacture tissue paper products using a multi-stand type interfolder, and to produce tissue paper products that do not require major equipment modifications and that require only minor modifications to existing equipment. It is in providing the manufacturing method of. Other problems will become apparent from the description of the effect column of the present invention described later.

Means for solving the above problems are as follows.
[Invention of Claim 1]
Producing a plurality of secondary web rolls for setting in the multi-stand type interfolder from the primary web roll;
Set the secondary web roll in the multi-stand type interfolder, feed the secondary continuous sheet from the set secondary web roll, and fold it so that the side edges of the adjacent secondary continuous sheets are crossed together Laminating and producing a laminated strip,
By cutting laminated strip has a perforation in the upper surface, is opened by breaking the perforation, and have a, a step of accommodating the storage box is covered by a film of said opening has a slit , When the top tissue paper is pulled out from the slit, the side edge of the next tissue paper is pulled out ,
The process of manufacturing the said secondary raw fabric roll,
A lamination step in which a primary continuous sheet fed from a plurality of primary fabric rolls is laminated along the continuous direction to form a laminated continuous sheet;
From both sides of the continuous sheet, an aqueous chemical solution containing 70 to 90% by mass of a polyol having moisture retention, 1 to 15% by mass of moisture, and 0.01 to 22% by mass of a functional chemical is obtained by flexographic printing. A primary chemical solution application step of applying 0.5 to 1.5 g / m ² to each continuous sheet constituting the sheet ;
From both sides of the laminated continuous sheet that has undergone the first chemical solution coating process, 70 to 90 mass% of a polyol having moisture retention, 1 to 15 mass% of moisture, and 0.01 to 22 mass% of a functional chemical are obtained by flexographic printing. A secondary chemical solution application step of applying an aqueous chemical solution containing 0.5 to 1.5 g / m ² to each continuous sheet constituting the continuous sheet ;
A slitting process for slitting the laminated continuous sheet so as to be a product width of tissue paper or a multiple of the width,
A winding process of winding each slit continuous sheet coaxially to form a product width of the tissue paper or a plurality of secondary rolls having a plurality of widths of the tissue paper. Production method.

[Invention of Claim 2]
The method for producing a tissue paper product according to claim 1, wherein the primary chemical solution application step and the secondary chemical solution application step are performed after the lamination step and before the slit step.

[Invention of Claim 3]
The manufacturing method of the tissue paper product of Claim 2 which has a smoothing process of smoothing with a calender between the said lamination | stacking process and the said 1st chemical | medical solution application | coating process.

[Invention of Claim 4]
The tissue paper product according to claim 2, further comprising a contact embossing step for applying a line-shaped contact embossing for preventing delamination of the laminated continuous sheet between the second chemical solution applying step and the slitting step. Manufacturing method.

  In the manufacturing method according to the present invention, the secondary roll for tissue paper product manufactured to have a product width of tissue paper or a multiple of the width of tissue paper in the slit process in the manufacturing method is set in a multi-stand type interfolder in this subsequent stage. . Next, the secondary continuous sheet is fed out from the secondary raw roll set in the multi-stand type interfolder, sent to the folding mechanism, stacked while being folded, and then cut into a predetermined length and the tissue paper Make a bundle and store it in a storage box.

In the present invention, continuously producing a secondary master roll for tissue paper product from a primary source roll, a so-called ply in the machine, secondary by the primary liquid applying process and a flexographic printing method by a flexographic printing method A chemical solution application process was incorporated to apply the chemical solution to the continuous sheet. Therefore, a minor modification of the existing papermaking equipment and the ply machine is sufficient without requiring a large equipment modification, and there is an advantage that a small investment equipment cost is sufficient.

  In addition, since the chemical application or application step is not provided in the multi-stand type interfolder, the chemical solution application step and the chemical application step are incorporated in the ply machine. Switching to the tissue paper product without coating is simply excellent depending on whether or not the secondary paper roll for tissue paper product is coated with a chemical solution, and thus is excellent in productivity.

  In addition, when providing a chemical solution application step in a multi-stand type interfolder, for example, it is conceivable to provide a large number of chemical solution application devices for a number of laminated continuous sheets, but this not only increases equipment costs, but also It is extremely difficult to secure the installation space, and it is practically impossible to accurately control the coating amount in each apparatus. Compared with this embodiment, the production method of the present invention provides advantages such as equipment cost and coating amount management.

By the way, in the manufacturing process of tissue paper by the multi-stand type interfolder, the processing speed of the ply machine is generally 700 to 1100 m / min in order to design the processing capacity of the ply machine in accordance with the processing capability of the multi-stand type interfolder. It is. In that case, the ply machine also needs to perform ply processing at a high speed of about 700 to 1400 m / min in order to match the production speed.
In such a high-speed ply machine, when applying stably with a uniform application amount in the width direction and with time, a flexographic printing method is superior to a chemical spraying method such as a spray method.
However, when trying to apply a chemical solution to a target sheet at a time with a certain amount of application amount, for example in flexographic printing , even if you select the number of anilox roll lines or cell volume ratio, it is not always stable, and as a result The coating amount varies, and stable operation becomes difficult.
Therefore, by adopting a form in which the chemical solution is applied to the sheet in two steps, the amount of application per time is reduced, and the variation in the width direction application applied the first time is offset by the variation in the second time application. As a result, there is an advantage that the coating form has little variation in the width direction.

In the chemical application, the flexographic printing method is particularly preferable. The flexographic printing system has the advantage that the application amount can be stabilized in response to the unevenness of the crepe paper even if the flexographic printing plate roll is made of resin and the processing speed is high, the number of anilox rolls, the cell capacity, By changing the number of lines and the vertex area ratio of the flexographic printing plate roll, there is an advantage that it is possible to easily cope with a wide range of chemical liquid viscosity and stabilize the coating amount.
In particular, a flexographic printing method using a doctor chamber is preferable. The doctor chamber type is a film made by coating the chemical solution directly on the surface of the anilox roll (transfer concave roll), and it is difficult to mix paper powder and air into the chemical solution, and the characteristics of the chemical solution are easy to stabilize. And since the chemical | medical solution transcribe | transferred from an anilox roll is uniform, even if it is the case of a low quantity application | coating, it can apply | coat suitably .

It is conceivable to apply the chemical solution to the roll coating method instead of the flexographic printing method, but it causes a variation in the coating amount in the width direction, making it difficult to obtain the target product quality. In addition, it is conceivable to provide a chemical solution application process by the flexographic printing method first, followed by a chemical solution spraying process, but the chemical solution spray has a larger variation than the chemical solution application by the printing method, and the chemical solution has a large variation on the uniformly applied chemical solution layer. Since this is a factor that impairs the uniformity in the width direction, it cannot be employed.

It is the schematic which shows the manufacturing equipment and manufacturing method which obtain a primary web roll after papermaking. It is a schematic explanatory drawing which shows an example of a multi stand type inter folder, and has shown the state seen from the line front. It is a schematic explanatory drawing which shows an example of a multi stand type inter folder, and has shown the state seen by crossing of a line. It is a schematic explanatory drawing which shows an example of a multi stand type interfolder, and has shown the state which looked at the line main body from the front. It is a longitudinal cross-sectional view of the folded tissue paper. (A) It is a figure which shows a mode that the tissue paper bundle is accommodated in the storage box. (B) It is a partially broken figure which shows a mode that the tissue paper accommodated in the storage box is taken out. It is a principal part expansion perspective view of the site | part regarding a folding plate. It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is a principal part expansion perspective view which shows how to fold a secondary continuous sheet (tissue paper). It is the schematic which shows the manufacturing equipment and manufacturing method of a secondary web roll. It is a principal part enlarged view of the periphery of a chemical | medical solution application means shown in FIG. It is a figure which shows a mode that the contact embossing is provided to the lamination | stacking continuous sheet by the contact embossing means. It is a schematic block diagram which shows an example of a chemical | medical solution supply apparatus. It is a schematic diagram for demonstrating the derivation | leading-out part of the chemical | medical solution supply apparatus in FIG. It is a schematic diagram for demonstrating the other derivation | leading-out part of a chemical | medical solution supply apparatus. It is a schematic diagram for demonstrating the other derivation | leading-out part of a chemical | medical solution supply apparatus. It is a figure explaining the structure of the doctor chamber used with the chemical | medical solution supply apparatus of embodiment shown by FIG. 14, Comprising: (A) shows the structure which has two introduction parts and one derivation | leading-out part, (B) is 3 A structure having one introduction part and two derivation parts is shown, and (C) shows a structure in which the same number of introduction parts and derivation parts exist. It is the schematic which shows the manufacturing equipment and manufacturing method of another secondary raw fabric roll. It is the schematic which shows the manufacturing equipment and manufacturing method of another secondary raw fabric roll. It is the schematic which shows the manufacturing equipment and manufacturing method of another secondary raw fabric roll. It is the schematic which shows the manufacturing equipment and manufacturing method of another secondary raw fabric roll. It is a figure which shows the state which substituted the chemical | medical solution application | coating means shown by FIG. It is a schematic diagram which shows the structure of a lamination | stacking continuous sheet (tissue paper). (A) MD direction sectional drawing before chemical | medical solution application | coating, (B) Top view before chemical | medical solution osmosis | permeation process, (C) II arrow directional view. It is a schematic diagram which shows the surface uneven structure of a lamination | stacking continuous sheet (tissue paper). (A) Before chemical solution application, (B) After chemical solution application. It is a schematic diagram which shows a chemical | medical solution penetration process. It is a figure which shows the measuring method of the MMD value of tissue paper. It is a schematic block diagram of the example of a gravure chemical | medical solution application means.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[Production equipment and method for primary roll]
An example of production equipment and a production method for the primary web roll will be described with reference to FIG.
As shown in FIG. 1, a wet paper W is formed by supplying a pre-adjusted paper material from a head box 301 to a wire part 311 (forming process), and this wet paper W is fed into a felt 322 of a press part 321. After being transferred to, dehydration is performed by being sandwiched between a pair of dewatering rolls 323 and 324 (dehydration process). Next, the dehydrated wet paper W is attached to the surface of the Yankee dryer 331 partially covered with the Yankee dryer hood 332, dried, and peeled off by the doctor blade 333 to obtain the dry paper S1 (drying step).
Then, while the dry paper S1 is guided by the guide rolls 343 and 344, the first winding means 341 having the winding drum 342 is used to dry the dry paper S1 so that the back surface of the dry paper S1 faces the shaft side of the primary raw roll JR. A primary raw roll (commonly called “jumbo roll”) JR is formed by winding the paper S1 (first winding step). Note that the back surface of the dry paper S1 (primary continuous sheets S11 and S12 described later) means a surface (an anti-dryer surface) opposite to the surface that is in contact with the cylinder of the Yankee dryer 331.

  In the above paper making, for example, a dispersant, a dry paper strength enhancer, a wet paper strength enhancer, a softener, a release agent, an adhesive, a pH adjuster such as caustic soda, an antifoaming agent, an antiseptic, a slime. Appropriate chemicals such as control agents and dyes can be added.

  The dry paper S1 peeled off by the doctor blade 117 can be subjected to a smoothing process by a calendar means (not shown).

[Production facilities for secondary rolls for tissue paper products]
As shown in FIG. 11, the primary raw roll JR manufactured by the above-described manufacturing equipment / method is brought into the secondary raw roll manufacturing equipment X1 (ply machine X1) for tissue paper products according to the present invention, At least two or more primary fabric rolls JR and JR are set.
The ply machine X1 is a continuous sheet in which primary continuous sheets (S11, S12 in the illustrated example) fed from these primary raw rolls JR, JR are laminated along the continuous direction, and laminated in two plies in the illustrated example. The ply means 51 is used as S2.

  In the example shown in FIG. 11, the ply means 51 is configured such that the surfaces of the primary continuous sheets S11 and S12 fed out from the pair of primary raw rolls JR are respectively the surfaces of the laminated continuous sheet S2. The back surfaces of the sheets S11 and S12 can be respectively configured to be the surface of the laminated continuous sheet S2, and the back surface of one of the primary continuous sheets S11 and S12 is the surface of the laminated continuous sheet S2, and the other surface is It can also comprise so that it may become the surface of lamination | stacking continuous sheet S2. Among them, the primary continuous sheets S11 and S12 (dry paper S1) are in contact with the glossy surface of the Yankee dryer 331 during drying, and therefore have less fuzz as compared to the back surface and are smooth and soft to the touch. Most preferably, the surfaces of the sheets S11 and S12 (dry paper S1) are respectively configured to be the surface of the laminated continuous sheet S2.

At the subsequent stage of the ply means 51, a pair of primary chemical solution applying means 40A and 40B for applying a chemical solution to the laminated continuous sheet S2 flowing from the ply means 51 and applying the flexographic printing method, and flexo printing downstream thereof. Secondary chemical solution applying means 53A and 53B are provided to be applied in accordance with the method, and the secondary chemical solution applying means 53A and 53B are composed of a plurality of cutters arranged in parallel to the second chemical solution applying means 53A and 53B. A slit means 55 is provided for slitting the laminated continuous sheet S2 transferred from the means 53A and 53B so as to have a product width of tissue paper or a multiple of the product width. In the subsequent stage of the slit means 55, the laminated continuous sheet S2 slit by the slit means 55 is coaxially wound to form a plurality of secondary raw rolls R having a product width of tissue paper or a multiple of the width. A take-off means 56 is provided. Here, the winding means 56 has two winding drums 56A for guiding each slit continuous sheet S2 to the secondary raw roll R, and these two winding drums 56A are secondary. The laminated continuous sheet S2 is guided in contact with the outer peripheral surface of the raw roll R.

(Calendar means)
One or more calendering means 52 for calendering the laminated continuous sheet S2 may be provided in the production facility X1 for the secondary paper roll for tissue paper products.
The type of calendar in the calendar means 52 is not particularly limited, but is preferably a soft calendar or a chilled calendar for the purpose of improving the smoothness of the surface and adjusting the paper thickness. The soft calendar is a calendar using a roll coated with an elastic material such as urethane rubber, and the chilled calendar is a calendar made of a metal roll.
The number of calendar means 52 can be changed as appropriate. If there are a plurality of installations, there is an advantage that even if the processing speed is high, it can be sufficiently smoothed.
When two or more calendar means 52 are installed, they can be arranged side by side in the horizontal direction, the up-down direction, or the diagonal direction, and these installation directions may be combined. When arranged side by side in the horizontal direction, the holding angle becomes smaller, so the processing speed can be increased, and when arranged side by side in the vertical direction, the installation space can be reduced. Here, the holding angle means an angle while the sheet is in contact (a part of an arc of a cross section perpendicular to the axis) when viewed from the roll axis center (the same applies hereinafter).
Paper making is also performed as control factors such as calendar type, nip line pressure, and number of nips in the calendar processing conditions, and these control factors are preferably changed as appropriate depending on the quality of tissue paper to be obtained, that is, paper thickness and surface properties.
Further, the installation position of the calendar means 52 is not particularly limited, but is preferably a stage after the ply means 51 and a stage before the primary chemical solution coating means 40A, 40B. The second chemical solution applying means 53A and 53B can be arranged after the contact embossing means 54, but the gap between the fibers to which the chemical solution is applied is crimped. Since it works, it is not a preferable form.

(Medication spraying means)
As the primary chemical solution applying means 40A and 40B and the secondary chemical solution applying means 53A and 53B, those applied by a flexographic printing method are used.
Application amount of the chemical liquid against dry paper S2 of the first order liquid applying means 40A, 40B is desirably a 0.5 to 1.5 g / m ^2, more preferably 0.7 to 1.2 g / m ² It is said. Second liquid applying unit 53A, the application amount of the chemical liquid in 53B also, it is desirable to 0.5 to 1.5 g / m ^2, more preferably between 0.7 to 1.2 g / m ^2. Therefore, it is desirable that the total is 1.0 to 3.0 g / m ² for one ply. In order to obtain a product of 2 plies, it is desirable to 2.0 to 6.0 g / m ² in 2-ply total, particularly an 2.5~5.0g / m ² is desirable. By making the balance of the chemical application amount between the primary and secondary the above ratio, the above-described effects of the present invention are more remarkably exhibited.
Even if there is a difference in coating amount between the primary chemical solution applying means 40A and 40B and the second chemical solution applying means 53A and 53B, the secondary chemical roll applying means R is stored after being stored as the secondary raw roll R. Since the plies are in contact with each other within the time required for processing (8 hours or more), the chemical solutions gradually permeate and diffuse, the amounts of the chemicals applied are equalized, and the applied amount difference between the plies becomes small.

(Medical solution)
The chemical solution used in the present invention is preferably the same for the primary chemical solution applying means 40A and 40B and the secondary chemical solution applying means 53A and 53B in order to achieve affinity.
In the primary chemical solution applying means 40A, 40B and the secondary chemical solution applying means 53A, 53B, the viscosity is 1 to 700 mPa · s at 40 ° C., particularly 50 to 400 mPa · s (40 ° C.) from the viewpoint of applying the chemical solution at high speed. Is preferable. If it is less than 1 mPa · s, the chemical solution is likely to be scattered on rolls such as anilox rolls and printing plate rolls. Conversely, if it is more than 700 mPa · s, it tends to be difficult to control the amount of application to each roll or continuous sheet.

  The chemical solution is particularly preferably an aqueous solution, and preferably contains 70 to 90% by mass of polyol, 1 to 15% by mass of water, and 0.01 to 22% by mass of functional chemicals as its components.

  Examples of the polyol include polyhydric alcohols such as glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, and derivatives thereof, and saccharides such as sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose.

  Functional agents include softeners, surfactants, inorganic and organic fine particle powders, oily components, and the like. Softeners and surfactants have the effect of imparting flexibility to the tissue and smoothing the surface, and anionic surfactants, cationic surfactants and zwitterionic surfactants are applied. Inorganic and organic fine particle powders have a smooth surface. The oil component has a function of improving lubricity, and higher alcohols such as liquid paraffin, cetanol, stearyl alcohol, and oleyl alcohol can be used.

  In addition, as a functional agent for maintaining the moisture retention of polyol, one or more of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. Moisturizers such as any combination can be added.

As functional agents, emollients such as fragrances, various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc. A deodorant can be appropriately blended. Furthermore, you may contain the antioxidant of vitamin C and vitamin E.
Of the above components, it is preferable to use a polyhydric alcohol such as glycerin or propylene glycol as a main component in order to stabilize the viscosity and coating amount of the chemical solution.
The temperature at the time of chemical solution application is preferably 30 ° C to 60 ° C, preferably 35 ° C to 55 ° C.

In addition, when providing a difference in the crepe rate of each primary continuous sheet constituting the laminated continuous sheet S2, more chemicals are applied to the primary continuous sheet side having the higher crepe rate (primary continuous sheet S11 side in the illustrated example). Is also proposed. For example, in the example shown in FIGS. 11 and 24, of the two secondary chemical solution applying means, the secondary chemical solution applying means 53B that directly applies the chemical solution to the primary continuous sheet S11 is the other second chemical solution applying means. It is desirable to apply more chemical solution than the next chemical solution application means 53A.
Thus, even if there is a difference in the coating amount between the second chemical solution coating means 53A and 53B, the time until the sheet is folded as a secondary raw roll R after coating (8 hours or more) Since the plies are in contact with each other, the chemical solution gradually permeates and diffuses, the amount of the chemical solution applied between the two is equalized, and the applied amount difference between the plies becomes small.

  FIG. 24A is a cross-sectional view of the laminated continuous sheet S2 laminated on the two plies before chemical solution application (cross-sectional view cut in parallel with the MD direction). In applying the chemical solution to both surfaces of the laminated continuous sheet S2 laminated in two plies, a difference is provided in the amount of the chemical solution on both surfaces, and a large amount of the chemical solution is applied to the primary continuous sheet S11 side in the drawing. After the chemical solution is applied, before the laminated continuous sheet S2 is fully stretched, the laminated layers are integrated by contact embossing CE and cut into the product width by the slit means 55 (FIG. 24B). Thereafter, the laminated continuous sheet S2 is taken up by the take-up means 56 and is left to stand for infiltration of the chemical solution. The primary continuous sheets S11 and S12 constituting the laminated continuous sheet S2 coated with the chemical solution by the secondary chemical solution application unit 53 mainly extend in the MD direction. At that time, the primary continuous sheet S11 to which more chemical solution is applied has a higher elongation rate than the other primary continuous sheet S12, but the primary continuous sheets S11 and S12 are fixed to each other by contact embossing CE. Wrinkles occur on the surface of the extended primary continuous sheet S11 (24 (C)). A difference is also provided in the crepe rate of the laminated continuous sheet S2 to be laminated, and if a base paper having a high crepe rate is used for the primary continuous sheet S11, a difference may be caused in the elongation rate between the primary continuous sheet S11 and the primary continuous sheet S12. it can.

  The crepe is formed by the difference between the dryer speed and the winding speed after the base paper is dried by the Yankee dryer 115 and then peeled off from the Yankee dryer 115 by the doctor blade 117. The shape of this crepe is adjusted by sticking the paper to the Yankee dryer 115, but since there is some variation in this sticking and the fiber raw material is not evenly distributed, There is some variation in the three-dimensional crepe shape. This variation becomes more prominent as the crepe rate increases.

  Along with the variation of the crepe, there is also a variation in elongation when the chemical solution is applied, and this is formed as a three-dimensional fine wave. This wave does not become apparent during the seasoning of the original fabric because tension is applied, but it is restored and becomes apparent after processing and cutting into a product. The greater the amount of chemical applied to the sheet, the greater the crepe, the greater the change in the crepe shape, and the greater the corrugation of the sheet. Conversely, the smaller the amount of chemical applied to the sheet, the smaller the crepe, the smaller the crepe shape, The undulation is small. For this reason, a bulky effect can be made synergistic by changing not only the application amount but also the crepe rate.

  In addition, regarding the quality, when the primary continuous sheets S11 and S12 having different crepe rates are laminated to produce a product, the tissue paper that is the product has a different bulk feeling unless the chemical solution is applied (FIG. 25 ( A)). However, by applying more chemical solution to the primary continuous sheet S11 having a larger surface roughness (high crepe rate), the primary continuous sheet S11 extends at a higher elongation rate than the primary continuous sheet S12. Since it is fixed in parallel with the MD direction (not shown), the primary continuous sheet S11 corrugates and the bulk of the laminated sheet increases. (FIG. 25 (B)).

  By providing a difference in the amount of applied chemical solution, there is a concern that the touch on both sides of the product and the feeling of use will be different, but in the state of the roll before the secondary raw roll R is subjected to the next step (folding process etc.) Since the surfaces of the primary continuous sheets S11 and S12 having different chemical liquid application amounts are kept facing each other by being left standing (chemical liquid infiltration step, FIG. 26), the chemical liquid components between the continuous sheets are transferred little by little ( The difference is gradually reduced during seasoning. In addition, the white arrow in FIG. 26 shows the osmosis | permeation direction of a chemical | medical solution component.

On the other hand, as the secondary chemical solution applying means 53 in the present invention, a flexographic printing method is used. At this time, the sheet processing speed is 100 to 1100 m / min, preferably 350 to 1050 m / min, particularly preferably 450 to 1000 m / min. If it is less than 100 m / min, the productivity is low. On the other hand, if it is 1100 m / min or more, uneven coating tends to occur and the amount of chemical solution tends to increase.

In the case of the flexographic printing method, the number of flexographic printing plate rolls is 10 to 60 lines, preferably 15 to 40 lines, and particularly preferably 20 to 35 lines. If the number of lines is less than 10, many coating irregularities occur. On the other hand, if the number of lines exceeds 60 lines, the paper dust tends to clog. The number of lines of anilox roll is 10 to 300 lines, preferably 25 to 200 lines, particularly preferably 50 to 100 lines. If the number of lines is less than 10, many coating irregularities occur. On the other hand, if the number of lines exceeds 300 lines, the paper dust tends to be clogged. The anilox roll has a cell capacity of 10 to 100 cc, preferably 15 to 70 cc, particularly preferably 30 to 60 cc. If the cell capacity is less than 10 cc, a desired coating amount cannot be obtained.
The flexographic printing method can stabilize the coating amount even when the processing speed is high, and can stably apply a wide range of chemical viscosity with a single roll.

  The means (calendar means 52 and contact embossing means 54 in the example of FIG. 11) arranged before and after the secondary chemical solution applying means 53 are preferably arranged close to each other. By doing so, when manufacturing a tissue paper product to which no chemical solution is applied, the laminated continuous sheet S2 is directly transferred from the front stage to the rear stage of the secondary chemical solution application unit 53, and does not pass through the secondary chemical solution application unit 53. Since it is only necessary to pass the laminated continuous sheet S2, the presence / absence of the chemical application can be easily switched. For example, in the production facility X1 for the secondary paper roll for tissue paper product shown in FIG. 11, when producing the tissue paper product to which the chemical solution is not applied, as shown by a two-dot chain line in FIG. It is only necessary to transfer directly from the means 52 to the contact embossing means 54 and to flow the laminated continuous sheet S2 without passing through the secondary chemical solution applying means 53.

<Embodiment 1 in the form of a doctor chamber>
Here, an example of the doctor chamber type in the buoyancy printing method will be described.
As shown in FIG. 12, the chemical solution application unit 53A in the form of one of the doctor chambers has a doctor chamber 61A in which a chemical solution is placed facing a rotatable anilox roll 63A, and the anilox from the doctor chamber 61A. The chemical solution is delivered to the roll 63A. Further, a printing plate roll 64A that is in contact with the anilox roll 63A and is also in contact with one surface of the laminated continuous sheet S2 is rotatably installed, and a chemical solution is delivered from the anilox roll 63A to the printing plate roll 64A. Further, the chemical solution is applied from the printing plate roll 64A to the laminated continuous sheet S2 while applying pressure to the laminated continuous sheet S2 with the elastic roll 65A facing the printing plate roll 64A across the laminated continuous sheet S2. It has become.

  And in this form, this chemical | medical solution application part 53A is located in the surface side of the lamination | stacking continuous sheet S2 facing the roller 54A of the contact embossing means 54 mentioned later, and also facing the above-mentioned winding drum 56A. A supply pump (not shown) for applying a chemical solution to the doctor chamber 61A and a discharge supply pump (not shown) for returning the chemical solution from the doctor chamber 61A are installed in the doctor chamber 61A.

  On the other hand, as shown in FIG. 12, the chemical solution application section 53B in the form of the other doctor chamber has a doctor chamber 61B in which a chemical solution is placed facing the rotatable anilox roll 63B. The chemical solution is delivered to the anilox roll 63B. Further, a printing plate roll 64B that is in contact with the anilox roll 63B and is also in contact with the other surface of the laminated continuous sheet S2 is rotatably installed, and a chemical solution is delivered from the anilox roll 63B to the printing plate roll 64B. Yes. Furthermore, the chemical solution is applied from the printing plate roll 64B to the laminated continuous sheet S2 while applying pressure to the laminated continuous sheet S2 with the elastic roll 65B facing the printing plate roll 64B across the laminated continuous sheet S2. It has become.

  In the present embodiment, the chemical solution application portion 53B is positioned on the other surface side of the laminated continuous sheet S2 that is not opposed to the roller 54A and is also not opposed to the winding drum 56A. A supply pump (not shown) for applying a chemical solution to the doctor chamber 61B and a discharge supply pump (not shown) for returning the chemical solution from the doctor chamber 61B are also installed in the doctor chamber 61B. .

  Accordingly, the chemical solution is applied to both surfaces of the laminated continuous sheet S2 from the chemical solution application unit 53A and the chemical solution application unit 53B. At this time, the coating amount on the surface side of the laminated continuous sheet S2 facing the roller 54A by the chemical solution application unit 53A Can be applied to the laminated continuous sheet S2 from both sides of the laminated continuous sheet S2, while reducing the amount of the liquid applied to the other surface side by the chemical applying unit 53B.

Here, as described above, the total coating amount on both sides is set to 2.5 to 5 g / m ^2, and the coating amount on the outer peripheral surface of the secondary raw roll R which is a ply raw roll is set to the secondary raw fabric. When less than the coating amount on the inner peripheral surface of the roll R, the coating amount on the outer peripheral surface of the secondary raw roll R out of the total coating amount of the chemical solution on both sides of the paper is 20% or more and less than 50%. However, the specific value varies within the above range because the optimum condition varies depending on the balance between the slip and quality of the secondary roll R, the thickness of the sheet, the permeability of the chemical, and the transferability.
Specifically, it is possible not only to change the coating amount on each side, but also to roughen the flexographic plate so that the number of lines of the flexographic plate is about 15 to 40 lines and the apex area ratio is about 20 to 40% so that the chemical solution does not scatter. By doing so, a dot pattern remains immediately after application, and an application part and an unapplication part can be instantaneously formed.

  Therefore, according to the present embodiment, the flexographic printing method allows the plate to be made of resin and is elastic, so that even if there are some irregularities on the sanitary thin paper, it can be adjusted by the printing pressure. Wrinkles are difficult to enter. On the other hand, by using the flexographic printing method, the coating amount can be stabilized even when the processing speed is high, and a wide range of chemical viscosity can be stably applied with one roll. Specifically, the application is also performed when the chemical solution to be used as a chemical solution is applied at a coating amount in the range described later while the laminated continuous sheet S2 is set to 700 m / min or more, preferably at a speed of 900 m / min or more. The laminated continuous sheet S2 can be wound evenly and without meandering.

Moreover, the conditions of the secondary chemical | medical solution application means 53 accompanying this form are as follows.
In the two-roll flexo-type secondary chemical solution application means, it is necessary to install a filtration device for paper powder and air contained in the chemical solution circulating in the application device such as a chemical solution tank. When the chamber-type secondary chemical solution applying means 53 is used, paper dust and the like are reduced, so that the load on the filtration device is reduced. Furthermore, it is desirable to stabilize the chemical viscosity by controlling the temperature of the chemical within the coating apparatus such as the doctor chamber 61A or 61B. In this case, a heater can be installed in the intermediate tank and piping connected to the doctor chambers 61A and 61B. On the other hand, when the coating amount is managed by the moisture content in the width direction of the laminated continuous sheet S2 during operation, the moisture amount and variation in the width direction can always be checked using, for example, an infrared inspection machine. Furthermore, if necessary, as shown in FIG. 12, brush rolls 66A and 66B having a large number of brushes are provided in contact with the printing plate rolls 64A and 64B, and the paper powder to which the printing plate rolls 64A and 64B are always attached is also provided. By scraping, clogging of the plate rolls 64A and 64B and the anilox rolls 63A and 63B can be prevented, and stable operation is possible.

<Embodiment 2 in the form of a doctor chamber>
Next, the doctor chamber type embodiment 2 will be described in detail below with reference to the structure shown in FIGS.
The illustrated chemical solution supply apparatus 100 is shown as one of the two chemical solution application units 53A and 53B in the doctor chamber type flexographic printing system that constitutes the secondary chemical solution application means 53 described above. The horizontal direction of the chemical solution supply apparatus 100 shown in FIG. 14 is defined as the X axis direction, and the vertical direction is defined as the Y axis direction.

The chemical solution supply apparatus 100 includes a storage tank 110 that stores the chemical solution L, an extrusion unit 120 that extrudes the chemical solution L in the storage tank 110, a doctor chamber 130 that stores the chemical solution L extruded from the extrusion unit 120, and a doctor chamber. The drawing part 140 which draws a part of the chemical liquid L stored in 130 into the tank 110, the chemical liquid transfer part 150 which transfers the chemical liquid L supplied from the doctor chamber 130 to the surface of the laminated continuous sheet S2, and the laminated continuous sheet S2 A rotation unit 160 that is wound around the peripheral surface and rotated, and the like are included.
Therefore, the above-described doctor chambers 61A and 61B are the doctor chamber 130 in the present embodiment, and the above-described elastic rolls 65A and 65B are the rotating unit 160 in the present embodiment.

  The storage tank 110 is a tank that stores the chemical liquid L therein, and an extrusion hose 121 of the extrusion unit 120 described later and a drawing hose 141 of the drawing unit 140 are inserted into the liquid layer.

The extruding unit 120 includes, for example, an extrusion hose 121 inserted into the storage tank 110, a supply pump 122 that extrudes the chemical liquid L stored in the storage tank 110 and supplies the chemical liquid L to the doctor chamber 130, and the chemical liquid L generated by the supply pump 122. And an adjustment valve 123 for adjusting the extrusion amount (flow rate).
The extrusion hose 121 is a hose having one end inserted into the storage tank 110 and the other end connected to the introduction part 132 of the doctor chamber 130, and functions as a flow path for transporting the chemical liquid L in the storage tank 110. The supply pump 122 is attached to the extrusion hose 121 and is driven by a drive motor (not shown) to pressurize and feed the chemical L in the storage tank 110 to the doctor chamber 130. The adjustment valve 123 adjusts the flow rate of the chemical liquid L pushed out by the supply pump 122 by opening and closing the valve.

For example, the pull-in unit 140 includes a pull-in hose 141 inserted into the storage tank 110 and a suction pump 142 that pulls the chemical L into the storage tank 110.
The draw-in hose 141 is a hose having one end inserted into the storage tank 110 and the other end connected to a lead-out part 133 of a doctor chamber 130 described later, and transports the chemical L derived from the lead-out part 133 to the storage tank 110. Functions as a flow path.
The suction pump 142 is attached to the drawing hose 141 and is driven by a drive motor (not shown) to suck the chemical liquid L led out from the lead-out unit 133 and discharge it to the storage tank 110 (outside).

  Accordingly, the supply pump that applies the chemical liquid to the doctor chambers 61A and 61B described above is the supply pump 122 that extrudes the chemical liquid L stored in the storage tank 110 and supplies it to the doctor chamber 130 in this embodiment. In this embodiment, the discharge supply pump for returning the chemical solution from the doctor chambers 61A and 61B is the suction pump 142 that draws the chemical solution L into the storage tank 110.

  The doctor chamber 130 is disposed adjacent to an anilox roll 151 to be described later, and includes a main body part 131 that stores the chemical L, an introduction part 132 that connects the extruding part 120 and the main body part 131, a retracting part 140, and a main body part 131. And a derivation unit 133 that connects the two.

The main body portion 131 is a main body portion of the doctor chamber 130 and includes a storage portion 131a and blades 131b and 131c.
The storage part 131 a is open at the end on the anilox roll 151 side, is connected to the introduction part 132 and the lead-out part 133, and supplies the chemical solution L stored inside to the anilox roll 151. A part of the chemical liquid L introduced into the storage part 131a from the introduction part 132 is led out through the lead-out part 133 so that the supply amount to the anilox roll 151 is constant. Has been.
Therefore, the above-described anilox rolls 63A and 63B are anilox rolls 151 in the present embodiment.
The blades 131b and 131c are provided so as to come into contact with the anilox roll 151, and perform the throttling of the chemical liquid L in a state of being pressed against the anilox roll 151.

  The introduction part 132 is a tubular joint that has one end connected to the main body part 131 and the other end connected to the extrusion hose 121 of the extrusion part 120, and connects the extrusion part 120 and the main body part 131. The chemical liquid L thus made can be introduced into the storage part 131 a of the main body part 131.

As shown in FIGS. 14 and 15, the lead-out part 133 is configured to include a joint 133a, a hole 133b, and a tube 133c.
The joint 133 a is a tubular joint that has one end connected to the main body portion 131 and the other end connected to the drawing hose 141 of the drawing portion 140 to connect the drawing portion 140 and the main body portion 131.

The hole 133b is an opening formed on the upper surface of the joint 133a and having a predetermined diameter.
That is, since the hole 133b is provided in the joint 133a, the chemical liquid L in the joint 133a comes into contact with the outside air. Therefore, even when the chemical liquid L is circulated by discharging a part of the chemical liquid L introduced from the introduction part 132 (derived from the outlet part 133) and circulating the chemical liquid L, the hole 133b causes the suction of the chemical liquid L. Since the chemical liquid L comes into contact with the outside air and the internal pressure can be brought close to the external pressure, fluctuations in the internal pressure in the doctor chamber 130 can be suppressed.
The hole 133b may be formed on the upper surface of the main body 131 so as to communicate with the storage portion 131a, for example, as long as the internal pressure fluctuation in the doctor chamber 130 is suppressed.

The tube 133c is a transparent or translucent tube-like member having a lower end connected to the hole 133b and extending upward. Therefore, when discharging a part of the chemical liquid L introduced from the introduction part 132 and circulating the chemical liquid L, it is visually confirmed whether the chemical liquid L flows into the tube 133c through the hole 133b. Can do.
That is, when the inflow into the tube 133c is confirmed, the amount of the chemical liquid L stored in the storage portion 131a is excessive (the chemical liquid L is in an oversupply state with respect to the anilox roll 151). ) Therefore, the user who has visually confirmed the excessive state can solve the excessive state by, for example, adjusting the extrusion amount (flow rate) of the chemical liquid L by operating the adjustment valve 123. .
Since the tube 133c is hollow and the upper end side is in contact with the outside air, the operation of the hole 133b is not offset.

The chemical transfer unit 150 includes, for example, an anilox roll 151 to which the chemical solution L is supplied from the doctor chamber 130, and a printing plate roll 152 provided between the anilox roll 151 and a rotation unit 160 described later. The
That is, the above-described printing plate rolls 64A and 64B are used as the printing plate roll 152 in this embodiment.

The anilox roll 151 is provided so as to come into contact with the blades 131b and 131c of the doctor chamber 130, and is configured such that the chemical liquid L supplied from the opening of the storage portion 131a of the doctor chamber 130 is adsorbed on the peripheral surface.
Further, since the anilox roll 151 has a cylindrical shape and is configured to be rotatable about an axis orthogonal to the XY plane, the chemical liquid L adsorbed on the peripheral surface as described above is rotated by the printing plate roll. 152 can be transferred.

The printing plate roll 152 has a cylindrical shape whose peripheral surface is made of a rubber material, and the peripheral surfaces (points P1 and P2 shown in FIG. 14) are wound around the anilox roll 151 and the rotation unit 160 (the periphery of the left and right ends). The continuous sheet S2) is provided so as to contact the peripheral surface of the continuous sheet S2), and is configured to be rotatable around an axis orthogonal to the XY plane.
Therefore, the plate roll 152 rotates in the r2 direction when the rotating portion 160 that contacts the left end rotates in the r1 direction, and rotates the anilox roll 151 that contacts the right end in the r1 direction. That is, the printing plate roll 152 can acquire the chemical liquid L adsorbed on the peripheral surface of the anilox roll 151 at the point P2, transport it to the point P1 by rotation in the r2 direction, and transfer it to the laminated continuous sheet S2. it can.
Therefore, even if the chemical liquid L adsorbed by the anilox roll 151 remains in a layered manner on the peripheral surface of the anilox roll 151, the chemical liquid L is transferred to the peripheral surface of the printing plate roll 152, so that the chemical liquid is applied to the laminated continuous sheet S2. L can be transferred uniformly.

The rotation unit 160 is provided adjacent to the printing plate roll 152, and rotates around an axis orthogonal to the XY plane (for example, r1 direction in FIG. 14) when a driving force is applied from a motor (not shown) or the like. It is a cylindrical member that is configured to be capable of gripping the laminated continuous sheet S2 on the peripheral surface. Therefore, the rotating unit 160 rotates in the r1 direction so as to wind the supplied laminated continuous sheet S2 around the peripheral surface and rotate the printing plate roll 152 and the anilox roll 151 to convey them to the point P1 position. At the time, the chemical liquid L can be transferred from the printing plate roll 152.
In addition, although the rotation direction of the rotation unit 160 is the r1 direction in FIG. 14, the rotation unit 160 may of course be configured to rotate in the r2 direction. In this case, the anilox roll 151 and the printing plate roll 152 rotate in the directions opposite to those in FIG. 14 (that is, the anilox roll 151: r2 direction, the printing plate roll 152: r1 direction).

Next, the circulation operation of the chemical liquid L by the chemical liquid supply apparatus 100 according to the present embodiment will be described.
First, the supply pump 122 is driven, the chemical liquid L is extruded from the storage tank 110, and supplied to the storage part 131 a of the main body part 131 through the extrusion hose 121 and the introduction part 132 of the doctor chamber 130.
Next, the rotation unit 160 is rotated to supply the chemical solution L in the storage unit 131a to the anilox roll 151, and the chemical solution L is transferred onto the laminated continuous sheet S2 via the printing plate roll 152.
In addition, the suction pump 142 is driven, and a part of the chemical liquid L in the storage part 131 a is discharged and circulated toward the storage tank 110 through the outlet part 133. At this time, the internal pressure fluctuation in the doctor chamber 130 is suppressed by the outside air contact through the hole 133b in the joint 133a of the outlet 133.
Further, when the inflow of the chemical liquid L into the tube 133c is confirmed during the circulation, the adjustment valve 123 is operated to adjust the flow rate of the chemical liquid L.

  As described above, according to the chemical liquid supply apparatus 100 according to the present embodiment, the storage tank 110 that stores the chemical liquid L, and the extrusion liquid 121 stored in the main body 131 of the doctor chamber 130 are used to store the chemical liquid L stored in the storage tank 110. And a suction pump 142 that sucks the chemical liquid L stored in the main body 131 of the doctor chamber 130 and discharges it to the storage tank 110 (external) via the pull-in hose 141. The chamber 130 connects the extrusion hose 121 and the main body 131, connects the introduction portion 132 for introducing the chemical L supplied by the supply pump 122 into the main body 131, and connects the drawing hose 141 and the main body 131. A guide provided with a tubular joint 133a for extracting a part of the chemical liquid L introduced into the main body 131. It includes a section 133, and configured with a hole 133b on the upper surface of the joint 133a of the outlet portion 133.

In the chemical solution supply apparatus 100, a hole 133 b is provided on the upper surface of the joint 133 a of the outlet portion 133. Therefore, when a part of the chemical liquid L in the main body 131 is discharged using the suction pump 142, the chemical liquid L comes into contact with the outside air through the hole 133 b, and therefore, the inside of the doctor chamber 130 caused by the operation of the suction pump 142. Internal pressure fluctuation can be suppressed. Further, in the present invention, since the suction pump 142 is used when part of the chemical liquid L is discharged, there is no need for a flow path for the natural dropping of the chemical liquid L, and the installation position of the tank 110 is also a special doctor chamber 130. It is not limited to the upper part or the like.
Therefore, it can be said that the chemical solution supply device 100 is a chemical solution supply device 100 that can suppress the internal pressure fluctuation in the doctor chamber 130 when sucking out the chemical solution L from the doctor chamber 130 and can be installed in a space-saving as much as possible.
The doctor chamber 130 includes a transparent or translucent tube 133c having a lower end connected to the hole 133b and extending upward.

That is, when part of the chemical liquid L introduced from the introduction part 132 is discharged and the chemical liquid L is circulated, it is visually confirmed whether the chemical liquid L flows into the tube 133c through the hole 133b. Can do. Therefore, when the inflow into the tube 133c is confirmed, the amount of the chemical liquid L stored in the storage portion 131a is excessive (the chemical liquid L is in an oversupply state with respect to the anilox roll 151). ) Therefore, the user who has visually confirmed the excessive state can solve the excessive state by, for example, operating the adjustment valve 123 to adjust the flow rate of the chemical liquid L.
Further, by providing the tube 133c with the upper end (free end) facing downward, it is possible to prevent foreign matters such as paper dust from entering the hole 133b.

<Embodiment 3 in the form of a doctor chamber>
Next, the chemical solution supply apparatus 200 of the third embodiment in the doctor chamber format will be described with reference to FIG.
In the chemical solution supply apparatus 100 of the doctor chamber type embodiment 2, the chemical solution L is oversupplied to the anilox roll 151 by visually confirming the inflow of the chemical solution L into the tube 133c connected to the hole 133b. However, the chemical solution supply apparatus 200 according to the present embodiment is configured to automatically determine whether or not the state has been reached and to notify the user of the determination result. .
In the following description of the chemical solution supply apparatus 200, differences from the doctor solution type embodiment 100 of the chemical solution supply apparatus 100 will be mainly described, and the same components are denoted by the same reference numerals and description thereof will be omitted. .

  As shown in FIG. 16, the lead-out part 233 of the present embodiment includes a joint 133a, a hole 133b, a cylindrical part 133d provided above the hole 133b, and a sensor part attached to the cylindrical part 133d. 133e.

  The cylindrical portion 133d is a cylindrical member that has a lower end fixedly connected to the peripheral surface of the hole 133b by welding or the like and extends upward.

The sensor unit 133e includes a sensor 133f provided in the cylindrical portion 133d, and a notification unit 133g attached to the sensor 133f and performing notification in conjunction with detection of the sensor 133f.
The sensor 133f includes, for example, a light emitting element (not shown) that emits light toward the detected object, and a light receiving element (not shown) that receives the reflected light from the detected object, and reflects the reflected light from the light receiving element. Based on the amount of received light, the sensor detects whether the height of the chemical liquid L flowing into the cylindrical portion 133d has reached the height position (y1 shown in FIG. 16) where the sensor 133f is provided.
For example, the notification unit 133g is a speaker or the like, and when the sensor 133f detects that the height of the chemical liquid L flowing into the cylindrical portion 133d has reached the height position where the sensor 133f is provided, The user is notified by voice.

That is, when part of the chemical liquid L introduced from the introduction part 132 is discharged and the chemical liquid L is circulated, the sensor 133f determines whether or not the chemical liquid L flowing into the cylindrical part 133d has reached the height position. By detecting, it is possible to determine whether or not the amount of the chemical liquid L stored in the storage unit 131a is excessive (the chemical liquid L is in an excessive supply state with respect to the anilox roll 151). And, when the excessive state is reached, the user can know the fact by the notification unit 133g, for example, by operating the adjustment valve 123 to adjust the extrusion amount (flow rate) of the chemical liquid L, It becomes possible to eliminate the excessive state.
Since the cylindrical portion 133d is hollow and the upper end side is in contact with the outside air, the action of the hole 133b is not offset.

Next, the circulation operation of the chemical liquid L by the chemical liquid supply apparatus 200 according to the present embodiment will be described.
First, the supply pump 122 is driven, the chemical liquid L is extruded from the storage tank 110, and supplied to the storage part 131 a of the main body part 131 through the extrusion hose 121 and the introduction part 132 of the doctor chamber 130.
Next, the rotation unit 160 is rotated to supply the chemical solution L in the storage unit 131a to the anilox roll 151, and the chemical solution L is transferred onto the laminated continuous sheet S2 via the printing plate roll 152.
In addition, the suction pump 142 is driven, and a part of the chemical liquid L in the storage part 131 a is discharged and circulated toward the storage tank 110 via the outlet part 233. At this time, fluctuations in the internal pressure in the doctor chamber 130 are suppressed in the joint 133a of the lead-out part 233 through outside air contact in the hole part 133b.
Further, during the circulation, the sensor 133f detects that the height of the chemical liquid L flowing into the cylindrical portion 133d has reached the height position where the sensor 133f is provided, and the notification portion 133g notifies the user. When the effect is notified, the adjustment valve 123 is operated to adjust the flow rate of the chemical liquid L.

  As described above, according to the chemical solution supply apparatus 200 according to the present embodiment, the doctor chamber 130 has a cylindrical cylindrical portion 133d that has a lower end connected to the peripheral surface of the hole 133b and extends upward, and a cylindrical shape. A sensor 133f that detects whether the height of the chemical liquid L that is provided in the portion 133d and flows into the cylindrical portion 133d has reached a predetermined height position (a height position where the sensor 133f is provided), and a sensor 133f Thus, a notification unit 133g is configured to notify when it is detected that the height of the chemical liquid L flowing into the cylindrical portion 133d has reached the predetermined height position.

  That is, according to the chemical solution supply device 200, the same effect as the chemical solution supply device 100 is exhibited, and when the chemical solution L is circulated, the chemical solution L is applied to the anilox roll 151 by the sensor 133f and the notification unit 133g. It is possible to automatically determine whether or not the battery has reached an oversupply state, and to notify the user of the determination result, so that the burden on the user himself to perform the state determination is reduced.

<Embodiment 4 in the form of a doctor chamber>
Next, the chemical solution supply apparatus 300 according to the fourth embodiment in the doctor chamber format will be described with reference to FIG.
In the chemical solution supply device 100 of the doctor chamber type embodiment 2 and the chemical solution supply device 200 of the embodiment 3, the opening amount of the hole 133b is configured to be a fixed value, but in the chemical solution supply device 300 of the present embodiment, The opening amount can be adjusted.
In the following description of the chemical solution supply apparatus 300, differences from the chemical solution supply apparatus 100 of the doctor chamber type embodiment 2 and the chemical solution supply apparatus 200 of the embodiment 3 will be mainly described. Reference numerals are assigned and description is omitted.

  As shown in FIG. 17, the lead-out part 333 of the present embodiment includes a joint 133a, a cylindrical part 133d, a sensor part 133e, and an adjustment part 133h attached to the cylindrical part 133d. . The adjusting unit 133h is, for example, a needle valve, and includes a hole 133j as an opening formed on the upper surface of the joint 133a, and a valve main body 133i that adjusts the opening amount of the hole 133j.

The hole 133j has a shape in which an opening having a predetermined diameter is surrounded by an orifice.
The valve body 133i is disposed above the opening of the hole 133j, and includes a needle shaft (not shown) whose tip is tapered and can be moved up and down. The needle shaft is moved up and down to change the orifice of the hole 133j. It is comprised so that the opening amount of the hole 133j can be adjusted according to the opening degree at the time of contacting.

That is, since the opening amount of the hole 133j can be adjusted by the adjusting unit 133h, when the chemical liquid L is circulated, the opening amount of the hole 133j is changed according to the amount of fluctuation of the internal pressure in the doctor chamber 131. Can be adjusted appropriately. Therefore, for example, when the sensor part 133e detects that the height of the chemical liquid L flowing into the cylindrical part 133d has reached the height position where the sensor 133f is provided, the adjustment liquid 123 is operated to operate the chemical liquid L. In addition to coping with adjusting the amount of extrusion, the adjustment of the opening amount of the hole portion 133j by the adjusting portion 133h increases the air bleeding ability by the hole portion 133j (expands the contact area with the outside air). It is also possible to take measures to suppress the internal pressure fluctuation in the doctor chamber 130.
That is, by suppressing the internal pressure fluctuation, it is possible to suitably prevent ejection of the chemical liquid L from the doctor chamber 130 caused by the internal pressure fluctuation, suction of the chemical liquid L on the anilox roll 151 to the doctor chamber 130 side, and the like. Circulation of the chemical liquid L is promoted.

Next, the circulation operation of the chemical liquid L by the chemical liquid supply apparatus 300 according to the present embodiment will be described.
First, the supply pump 122 is driven, the chemical liquid L is extruded from the storage tank 110, and supplied to the storage part 131 a of the main body part 131 through the extrusion hose 121 and the introduction part 132 of the doctor chamber 130.
Next, the rotation unit 160 is rotated to supply the chemical solution L in the storage unit 131a to the anilox roll 151, and the chemical solution L is transferred onto the laminated continuous sheet S2 via the printing plate roll 152.
In addition, the suction pump 142 is driven, and a part of the chemical L in the storage part 131a is discharged toward the storage tank 110 through the lead-out part 333 and circulated. During the circulation, the sensor 133f detects that the height of the chemical liquid L flowing into the cylindrical portion 133d has reached the height position where the sensor 133f is provided, and the notification unit 133g notifies the user. In such a case, it can be dealt with by operating the adjusting valve 123 or adjusting the opening amount of the hole 133j by the adjusting portion 133h.

  As described above, according to the chemical solution supply apparatus 300 according to the present embodiment, the doctor chamber 130 includes the adjustment unit 133h that adjusts the opening amount of the hole 133j.

  That is, according to the chemical solution supply device 300, the same effect as the chemical solution supply device 100 is exhibited, and the opening amount of the hole 133j can be adjusted by the adjusting unit 133h. When the pressure is circulated, the internal pressure fluctuation in the doctor chamber 130 can be more suitably suppressed by appropriately adjusting the opening amount of the hole 133j in accordance with the internal pressure fluctuation amount in the doctor chamber 131.

  On the other hand, in the chemical solution supply apparatus of each of the above embodiments, the doctor chamber 130 has a structure including only one introduction portion 132 connected to the extrusion hose 121 and one introduction portion 132 connected to the extrusion hose 121. For example, FIG. It is good also as a structure like each example shown in.

  For example, in FIG. 18A, the doctor chamber 130 in the width direction D near the left and right ends of the doctor chamber 130 formed with a wide rectangular shape along the anilox roll 151 that is formed wide and rotates around the rotation axis R0. It is set as the structure which has the introduction part 132 connected to the extrusion hose 121 in each location. And it is also set as the structure where the one lead-out part 133 connected with the drawing hose 141 exists in the center part of this doctor chamber 130. FIG.

  That is, in the example shown in FIG. 18 (A), the two extrusion hoses 121 are connected to the two introduction portions 132, respectively, and the chemical solution L is supplied from the vicinity of the left and right ends of the doctor chamber 130. The fresh chemical solution L can be supplied into the doctor chamber 130 on average, and the remaining chemical solution L is led out from the doctor chamber 130 from the lead-out portion 133 at the center.

  In FIG. 18B, the doctor chamber 130 is formed in a wide rectangular shape and is formed in a wide rectangular shape along the anilox roll 151 that rotates about the rotation axis R0. It is set as the structure which has the introduction part 132 connected to the extrusion hose 121 in the location and the location of a center part, respectively. And it is also set as the structure where the two derivation | leading-out parts 133 connected to the drawing hose 141 exist in the location near the right-and-left of the width direction D of this doctor chamber 130, respectively.

  That is, in the example shown in FIG. 18B, two lead-out parts 133 are arranged between the three introduction parts 132, respectively, and the three extrusion hoses 121 each have three introduction parts 132. By supplying the chemical liquid L from the vicinity of the left and right ends and the center of the doctor chamber 130, the fresh chemical liquid L from the storage tank 110 can be supplied into the doctor chamber 130 on the average, and the two outlets 133 are further connected. The excess chemical solution L is led out from the doctor chamber 130.

  On the other hand, in FIG. 18C, the doctor chamber 130 has an equal interval along the width direction D in which the outer frame is formed in a wide rectangular shape along the anilox roll 151 that is formed wide and rotates around the rotation axis R0. And it is set as the structure which has the introducing | transducing part 132 connected to the extrusion hose 121 in the several places near the upper side of a figure, respectively. And it is also set as the structure where the several extraction part 133 connected to the drawing hose 141 exists in the location near the lower side of the figure of the doctor chamber 130 adjacent to each introduction part 132, respectively.

  That is, in the example illustrated in FIG. 18C, the chemical liquid L is supplied from the extrusion hose 121 to the plurality of introduction portions 132 arranged along the width direction D of the doctor chamber 130, and each of the introduction portions 132 is provided. The surplus chemical liquid L is led out from the doctor chamber 130 from a plurality of the outlets 133 adjacent to each other. Therefore, also in this example, the fresh chemical liquid L from the storage tank 110 can be supplied into the doctor chamber 130 on average, and the surplus chemical liquid L from the derivation unit 133 is led out from the doctor chamber 130.

The scope of the present invention is not limited to the above embodiment, and various improvements and design changes may be made without departing from the spirit of the present invention.
For example, in the chemical solution supply apparatus 100, when the tube 133c is not provided, an air filter may be installed on the upper portion of the hole 133b so as to prevent foreign matters such as paper dust from entering the hole 133b. . Further, the hole 133b may be provided on the side surface of the main body 131 as long as it is above the liquid level of the chemical liquid L in the reservoir 131a.

<Embodiment of flexo 2-roll transfer type>
Here, an example of a two-roll transfer format in the bleed printing method will be described.
As shown in FIG. 11 and FIG. 23, the chemical application unit 53A, which is one of the quillo printing methods, is rotatably installed while a squeezing roll 62A as a dip roll is immersed in a chemical tank 66A containing a chemical. . Further, an anilox roll 63A is rotatably installed in contact with the squeezing roll 62A outside the chemical tank 66A, and the printing plate roll 64A in contact with the anilox roll 63A and in contact with one surface of the laminated continuous sheet S2 is rotatable. The pressure is applied to the laminated continuous sheet S2 by the elastic rolls 65A that are opposed to each other with the laminated continuous sheet S2 interposed therebetween.
In the present embodiment, the chemical solution application portion 53A is positioned on the surface side of the laminated continuous sheet S2 that faces a roller 54A of a contact embossing means 54 described later and also faces the winding drum 56A.

Also, as shown in FIGS. 11 and 23, the other chemical application portion 53B in the flexographic printing format is rotatably installed while a squeeze roll 62B as a dip roll is immersed in a chemical tank 66B containing the chemical. ing. Further, an anilox roll 63B is rotatably installed in contact with the squeeze roll 62B outside the chemical tank 66B, and a printing plate roll 64B that is in contact with the anilox roll 63B and in contact with the other surface of the laminated continuous sheet S2 is also provided. Pressure is applied to the laminated continuous sheet S2 with the elastic roll 65B that is rotatably installed and is opposed to the laminated continuous sheet S2.
In the present embodiment, the chemical solution application portion 53B is positioned on the other surface side of the laminated continuous sheet S2 that is not opposed to the roller 54A and is also not opposed to the winding drum 56A.

  Accordingly, the chemical solution is applied to both surfaces of the laminated continuous sheet S2 from the chemical solution application unit 53A and the chemical solution application unit 53B. At this time, the coating amount on the surface side of the laminated continuous sheet S2 facing the roller 54A by the chemical solution application unit 53A Can be applied to the laminated continuous sheet S2 from both sides of the laminated continuous sheet S2, while reducing the amount of the liquid applied to the other surface side by the chemical applying unit 53B.

Therefore, according to the present embodiment, since the plate is a resin using the flexo format and is elastic, even if there are some irregularities in the laminated continuous sheet S2, it can be adjusted by the printing pressure. Wrinkles are less likely to enter the laminated continuous sheet S <b> 2 than when applied with such a metal roll. On the other hand, by using the flexographic printing method, the coating amount can be stabilized even when the processing speed is high, and a wide range of chemical viscosity can be stably applied with one roll. Specifically, even when the continuous chemical sheet S2 is conveyed at a speed of 700 m / min or more and the chemical liquid is applied at a coating amount of 2.5 g to 5 g / m ² , the coating is uniform and meandering. It becomes possible to wind up the laminated continuous sheet S2.

<Embodiment of Flexo 1 Roll Transfer Format>
The one-roll transfer format in the flexographic printing method is obtained by omitting the squeezing rolls 62A and 62B from the flexo two-roll transfer format described above. In this case, the anilox rolls 63A and 63B are rotatably installed while being immersed in the chemical liquid tanks 66A and 66B, respectively. Further, a doctor blade (not shown) for scraping off the chemical solution on the surfaces of the anilox rolls 63A and 63B may be installed on the anilox rolls 63A and 63B. Such a flexo 1-roll transfer format has the advantage that the maintenance is relatively easy, and the advantage that the state of contamination of the blades and foreign matters such as paper dust in the chemical solution can be easily observed.

(Contact embossing means)
The production facility X1 for the secondary paper roll for tissue paper products can be provided with contact embossing means 54 for imparting contact embossing to the laminated continuous sheet S2.
Here, as shown in FIG. 13, in the contact embossing means 54, a receiving roll 54B, which is a metal roll or an elastic roll, and a metal, hard roller 54A having a fine convex portion 54C on the surface have a predetermined pressure. The outer peripheral surfaces are in contact with each other, and are installed so as to be rotatable. Then, with respect to the portion corresponding to the center in the width direction of the tissue paper product in the laminated continuous sheet S2, the laminated continuous sheet S2 is conveyed while sandwiching the laminated continuous sheet S2 between the convex portion 54C and the receiving roll 54B. Thus, line-shaped contact embossing CE for preventing delamination along the continuous direction of the laminated continuous sheet S2 is applied to the laminated continuous sheet S2.
In addition, the winding means 56 mentioned above winds up the lamination | stacking continuous sheet S2 by making the surface on the side facing the roller 54A which performs this contact embossing CE into an outer peripheral side.

By providing the contact embossing CE in this manner, delamination of the laminated continuous sheet S2 formed by laminating a plurality of primary continuous sheets (S11 and S12 in the illustrated example) is prevented. In addition, it is preferable that the contact embossing CE is formed so as to be positioned on both sides in the width direction of the tissue paper product so that the end portion of the tissue paper product is hardly delaminated.
The location where the contact embossing means 54 is installed is not particularly limited, but it is a stage subsequent to the chemical solution applying means 53 and preceding the slit means 55, and a stage subsequent to the calendar means 52 and preceding the chemical solution applying means 53. Can be considered. That is, it suffices if it is located at a position after the calendar means 52 and before the slit means 55.

  When the contact embossing means 54 is applied by the contact embossing means 54, the contact embossing CE is applied within 0.3 to 2.5 seconds, preferably within 0.3 to 1.0 seconds after the chemical solution is applied to the laminated continuous sheet S2. It is also proposed to give If the time is less than 0.3 seconds, the chemical solution is not sufficiently absorbed by the base paper, so that the chemical solution adheres to the receiving roll 54B and the roller 54A and the paper is cut off, or dirt is attached to the receiving roll 54B and the roller 54A. If the time exceeds 2.5 seconds, the laminated continuous sheet S2 coated with the chemical solution is stretched, so that subsequent process wrinkles are less likely to occur, making it difficult to obtain a bulky tissue paper product. In addition, when the laminated continuous sheet S2 is fully stretched, there is no stretch that can cope with draw fluctuations, and the tensile strength is reduced due to moisture absorption and water absorption.

Further, in this joining process, in the present embodiment, a metal and hard roller 54A having a fine convex portion 54C on the surface is used as a roller, but a line-shaped joint that prevents delamination from the laminated continuous sheet S2. For example, instead of the roller 54A, a roller having a fine needle-like member on the surface can be used as the roller.
Furthermore, the means for joining is not limited to the above example, and the tip shape of the convex portion may be a point, square, rectangular, circular, elliptical shape, etc. A tip having a slender linear shape or a thin and slanting linear shape may be used as the roller.
On the other hand, the arrangement of the protrusions may be equally spaced, but may not be staggered or evenly spaced. In addition to arranging the protrusions in a row and providing contact embossing continuously, It is also conceivable to arrange the parts in two or more rows. Then, a plurality of groups in which convex portions are arranged so as to provide a plurality of rows of contact embossing closely may be arranged to provide a plurality of contact embossing groups. In addition, as a joining process, you may join by other means, such as an ultrasonic wave, besides joining by applying a pressure mechanically as mentioned above.

As shown in FIG. 19, a tension control means 57 for controlling the tension of the laminated continuous sheet S2 may be provided between the secondary chemical solution applying means 53 and the contact embossing means 54. The tension control means 57 is formed of a cylindrical roll, and can be moved up and down in accordance with the bending state of the laminated continuous sheet S2.
Further, when the tension control means 57 is provided as shown in FIG. 19, it is also proposed to arrange the calendar means 52 at the front stage of the secondary chemical solution application means 53 and the rear stage of the tension control means 57. In this case, in the calendar means 52 arranged at the subsequent stage of the tension control means 57, when the chemical solution is applied, the calendar roll 52A is separated from the receiving roll 52B by a distance equal to or greater than the paper thickness of the laminated continuous sheet S2 to form the laminated continuous sheet S2. On the other hand, it is also proposed to pass through without performing a smoothing process (second manufacturing equipment and manufacturing process of a secondary web roll for tissue paper products).

(Primary continuous sheet)
The raw material pulp of primary continuous sheet S11, S12 is not specifically limited, According to the use of tissue paper products, an appropriate raw material pulp can be selected and used. As raw material pulp, for example, wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, and the like, more specifically, groundwood pulp (GP), stone ground pulp (SGP), refiner ground pulp (RGP), pressure type Mechanical pulp (MP), chemical mechanical pulp (CGP), semi-chemical pulp (such as ground pulp (PGW), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), bleach chemithermomechanical pulp (BCTMP) Chemical pulp (SCP), kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), soda pulp (AP), sulfite pulp (SP), dissolved pulp (DP), etc. CP), nylon, rayon, polyester, polyvinyl alcohol Synthetic pulp made from (PVA) etc., deinked pulp (DIP), waste paper pulp such as waist pulp (WP), waste pulp (TP), cotton, flax, hemp, jute, manila hemp, ramie etc. One or several kinds of rag pulp, straw pulp, esparto pulp, bagasse pulp, bamboo pulp, kenaf pulp, and other auxiliary pulps such as bast pulp can be appropriately selected and used.

  In particular, the raw material pulp is preferably a blend of NBKP and LBKP. Waste paper pulp may be blended as appropriate, but it may be composed only of NBKP and LBKP in terms of texture and the like, and the blending ratio (JIS P 8120) in that case is NBKP: LBKP = 20: 80-80: 20 is good, and NBKP: LBKP = 30: 70-60: 40 is particularly desirable.

The primary continuous sheets S11 and S12 have a basis weight according to JIS P 8124 of 10 to 25 g / m ² , preferably 12 to 20 g / m ^2, and more preferably 13 to 16 g / m ² . When the basis weight is less than 10 g / m ² , it is preferable in terms of softness, but an appropriate strength cannot be ensured. On the other hand, when the basis weight exceeds 25 g / m ² , it becomes too hard and the touch is deteriorated.
Further, the paper thickness (measured with a Peacock manufactured by Ozaki Seisakusho) is 80 to 250 μm, preferably 100 to 200 μm, more preferably 130 to 180 μm per ply.

  The primary continuous sheets S11 and S12 preferably have a crepe rate of 10 to 30%, more preferably 12 to 25%, and particularly preferably 13 to 20%. When the crepe rate is less than 10%, it becomes a tissue paper product that is easy to break during processing and has little stretch and is not stiff. On the other hand, if the crepe rate is more than 30%, it is difficult to control the tension of the sheet at the time of processing, and the paper tends to be cut off, and wrinkles occur after production, resulting in a poor-looking tissue paper product.

  The primary continuous sheets S11 and S12 have a dry tensile strength (hereinafter also referred to as dry paper strength) specified in JIS P 8113 of 2 to 200 p-200 cN / 25 mm, preferably 250 to 600 cN / 25 mm. The lateral direction is preferably 300 to 600 cN / 25 mm, and the lateral direction is 100 to 300 cN / 25 mm, preferably 130 to 270 cN / 25 mm, particularly preferably 150 to 250 cN / 25 mm. If the dry tensile strength of the base paper is too low, troubles such as paper breakage and elongation at the time of production and use are likely to occur, and if it is too high, the touch becomes stiff when used.

  These paper strengths can be adjusted by a known method. For example, a dry paper strength enhancer is internally added (added to a stage before the dryer part, for example, pulp slurry), and the freeness of pulp is reduced (for example, about 30 to 40 ml). A method of increasing (for example, 50% or more) the NBKP compounding ratio can be appropriately combined.

  As the dry paper strength agent, starch, polyacrylamide, CMC (carboxymethyl cellulose) or a salt thereof such as sodium carboxymethyl cellulose, carboxymethyl cellulose calcium, carboxymethyl cellulose zinc and the like can be used. As the wet paper strength agent, polyamide polyamine epichlorohydrin resin, urea resin, acid colloid / melamine resin, thermal crosslinkability imparting PAM and the like can be used. When the wet paper strength agent is internally added, the addition amount can be about 5 to 20 kg / t in weight ratio to the pulp slurry. In addition, when the dry paper strength agent is internally added, the addition amount can be about 0.5 to 1.0 kg / t by weight ratio to the pulp slurry.

[Production process of secondary roll for tissue paper products]
Next, an example of the manufacturing process of the secondary paper roll for tissue paper products according to the present invention will be described. The manufacturing process of the secondary paper roll for tissue paper products which concerns on this form can be performed using the manufacturing equipment X1 of the secondary raw material roll for tissue paper products mentioned above, for example.
As shown in FIG. 11, in the manufacturing process of the secondary paper roll for tissue paper products according to the present invention, primary continuous sheets (S11, S12 in the illustrated example) fed out from a plurality of primary paper rolls by the ply means 51. Are laminated along the continuous direction to form a laminated continuous sheet S2 (lamination step), and a chemical solution is applied to the laminated continuous sheet S2 by a pair of primary chemical solution applying means 40A and 40B, and then a pair of first sheets The chemical solution is applied by the secondary chemical solution applying means 53A and 53B (chemical solution applying step), and the laminated continuous sheet S2 is slit by the slit means 55 so as to be a product width of the tissue paper or a multiple width thereof (slit step). Furthermore, the laminated continuous sheet S2 slit in the slitting process is wound on the same axis, and the product width of the tissue paper or a plurality of secondary raw rolls having a multiple width thereof Le R, formed by the winding means 56.

  In addition, in the manufacturing process of the secondary raw material roll for tissue paper products which concerns on this form, similarly to the manufacturing equipment X1 of the secondary raw material roll for tissue paper products mentioned above, it is a back | latter stage and a chemical | medical solution application | coating process A smoothing step of smoothing the laminated continuous sheet S2 with a pair of calendar means 52 can be provided in the preceding stage. In addition, a contact embossing step for performing line-shaped contact embossing for preventing delamination by the contact embossing means 54 on the laminated continuous sheet S2 can be provided after the chemical solution applying step and before the slitting step.

  In the manufacturing equipment or manufacturing process of the secondary paper roll for tissue paper products according to this embodiment, the processing speed is 100 to 1100 m / min, preferably 350 to 1050 m / min, more preferably 450 to 1000 m. / Min. If it is less than 100 m / min, the productivity is low. On the other hand, if it exceeds 1100 m / min, the frequency of the laminated continuous sheet S2 is increased, and the chemical solution application process does not transfer the chemical solution of the printing plate roll or anilox roll. Since it tends to be stable, uneven coating may occur.

Note that a gravure printing method different from the flexographic printing method , for example, as shown in FIG. 32, the dip roll 71 picks up a certain amount of chemical from the chemical reservoir tray 70, and the chemical remaining in the cell of the dip roll 71 is transferred to the gravure roll 72. Moved to. Next, the chemical liquid transferred to the gravure roll 72 is simultaneously transferred to the surface of the laminated sheet S2 using the impression cylinder 74 as a backup while being scraped off by the scraping blade 73. Such as dot density of the gravure roll 72 is selected as appropriate.

[Multi-stand type inter folder]
A large number of secondary web rolls R manufactured in the above-described manufacturing equipment and manufacturing process for secondary paper rolls for tissue paper products are set in a multi-stand type interfolder. A tissue paper bundle is manufactured by unfolding and folding the next continuous sheet. Hereinafter, an example of the multi-stand type interfolder will be described.

  2 and 3 show an example of a multi-stand type interfolder. Reference numeral 2 in the figure denotes secondary raw rolls R, R... Set on a secondary raw roll support portion (not shown) of the multi-stand type interfolder 1. The secondary raw rolls R, R... Are set side by side in a direction (the horizontal direction in FIG. 2 and the front-to-back direction in FIG. 3) perpendicular to the illustrated plane. Each secondary web roll R has slits in the tissue paper product width in the manufacturing equipment and manufacturing process of the above-mentioned secondary paper roll for tissue paper products. It is wound and set in double width.

  The continuous belt-like secondary continuous sheets 3 </ b> A and 3 </ b> B unwound from the secondary raw roll R are guided by guide means such as guide rollers G <b> 1 and G <b> 1 and sent to the folding mechanism unit 20. Moreover, the folding mechanism part 20 is provided with the folding plate group 21 in which the required number of folding plates P, P ... are arranged in parallel as shown in FIG. For each folded plate P, guide rollers G2, G2 and guide round bar members G3, G3 for guiding a pair of continuous secondary continuous sheets 3A or 3B are respectively provided at appropriate positions. Further, below the folded plates P, P..., A conveyor 22 is provided that receives and conveys the laminated band 30 that is stacked while being folded.

  A folding mechanism using this type of folded plates P, P... Is a known mechanism, for example, from US Pat. As shown in FIG. 5, this type of folding mechanism folds each continuous secondary continuous sheet 3A, 3B... In the Z-shape and is adjacent to the adjacent secondary continuous sheet 3A, 3B. Stack the ends together.

  FIGS. 7 to 10 show in detail the portions of the folding mechanism 20 that are particularly related to the folded plate P. FIG. In the folding mechanism unit 20, a pair of continuous secondary continuous sheets 3A and 3B are guided for each folded plate P. At this time, the continuous secondary continuous sheets 3A and 3B are guided by the guide round bar members G3 and G3 while being shifted in position so that the side end portions do not overlap each other.

  A continuous secondary continuous sheet that is overlapped on the lower side when guided by the folded plate P is defined as a first continuous secondary continuous sheet 3A, and a continuous secondary continuous sheet that is overlapped on the upper side is a second continuous sheet. As shown in FIGS. 5 and 8, these continuous secondary sheets 3A and 3B are second continuous secondary sheets of the first continuous secondary continuous sheet 3A. The side end e1 that does not overlap the sheet 3B is folded back to the upper side of the second continuous secondary continuous sheet 3B by the side plate P1 of the folded plate P, and as shown in FIGS. The side end e2 of the continuous secondary continuous sheet 3B that does not overlap with the first continuous secondary continuous sheet 3A is folded downward so as to be drawn under the folded plate P from the slit P2 of the folded plate P. . At this time, as shown in FIGS. 5 and 10, the side end portion e3 (e1) of the continuous secondary continuous sheet 3A stacked while being folded in the upstream folded plate P is second from the slit P2 of the folded plate P. Are guided between the folded portions of the continuous secondary sheet 3B. In this way, each continuous secondary continuous sheet 3A, 3B... Is folded into a Z-shape and the side edges of adjacent continuous secondary continuous sheets 3A and 3B are crossed together. In some cases, when the top tissue paper is pulled out, the side edge of the next tissue paper is pulled out.

  As shown in FIG. 2, the laminated band 30 obtained by the multi-stand type interfolder 1 as described above is cut (cut) at a predetermined interval in the flow direction FL by the subsequent cutting means 41, and the tissue is cut. The tissue paper bundle 30a is stored in the storage box B in the subsequent equipment as shown in FIG. 6A. In the multi-stand type interfolder 1 as described above, the paper direction of the laminated strip 30 is the vertical direction (MD direction) along the flow direction FL, and the horizontal direction along the direction orthogonal to the flow direction. Direction (CD direction). For this reason, the direction of the paper of the tissue paper constituting the tissue paper bundle 30a obtained by cutting the laminated band 30 into a predetermined length is the extension of the folded portion of the tissue paper as shown in FIG. The vertical direction (MD direction) is along the existing direction, and the horizontal direction (CD direction) is along the direction orthogonal to the extending direction of the folded portion of the tissue paper.

FIG. 6B shows an example of a product in which the tissue paper bundle 30a is stored in the storage box B. A perforation M is provided on the upper surface of the storage box B, and a part of the upper surface of the storage box B is broken by the perforation M so that the upper surface of the storage box B is opened. The opening is covered with a film F having a slit at the center, and the tissue paper T can be taken out through the slit provided in the film F.
By the way, as described above, the direction of the paper of the tissue paper constituting the tissue paper bundle 30a is the horizontal direction (CD direction) along the direction orthogonal to the extending direction of the folded portion of the tissue paper. As shown in (b), when pulling out the tissue paper T from the storage box B, the pulling direction is along the lateral direction (CD direction) of the tissue paper T.

Next, other forms of manufacturing equipment and manufacturing process of the secondary paper roll for tissue paper products will be described.
[Manufacturing equipment and manufacturing process of secondary roll for third tissue paper product]
As shown in FIG. 20, the contact embossing means 54 can also be installed between the calendar means 52 and the secondary chemical solution applying means 53. The manufacturing process of the secondary paper roll for tissue paper products using the manufacturing equipment X3 of the secondary paper roll for tissue paper products is as follows.
As shown in FIG. 20, in the manufacturing process of the secondary paper roll for tissue paper products according to the present embodiment, primary continuous sheets (S11, S12 in the illustrated example) fed out from a plurality of primary paper rolls by the ply means 51. Are laminated along the continuous direction to form a laminated continuous sheet S2 (lamination step), and the laminated continuous sheet S2 is smoothed by a pair of calendar means 52 (smoothing step), and the smoothed lamination is performed. Contact embossing is applied to the continuous sheet S2 by the contact embossing means 54 (contact embossing process), and a chemical solution is applied to the laminated continuous sheet S2 provided with the contact embossing by the pair of secondary chemical solution applying means 53 ( Chemical solution application step), the slit means 55 makes the laminated continuous sheet S2 the product width of tissue paper or a multiple of the width. Next, the laminated continuous sheet S2 slit in the slit process is wound up coaxially to wind up a plurality of secondary rolls R having a product width of tissue paper or a multiple of the width. Formed by means 56.
In addition, when manufacturing the tissue paper product to which the chemical solution is not applied at the manufacturing facility X3 for the secondary paper roll for tissue paper product, the laminated continuous sheet S2 is removed from the contact embossing means 54 as shown by a two-dot chain line in FIG. It is only necessary to transfer directly to the slit means 55 and flow the laminated continuous sheet S2 without passing through the secondary chemical solution applying means 53.

[Fourth raw material roll production equipment and production process for tissue paper products]
As shown in FIG. 21, in the chemical solution applying step 53, the contact embossing means 54 is installed between the ply means 51 and the calendar means 52, and the secondary chemical solution applying means 53 and the contact embossing means with the calendar means 52 as one stage. 54 can also be installed. The manufacturing process of the secondary paper roll for tissue paper products using the manufacturing equipment X4 for the secondary paper roll for tissue paper products is as follows.
As shown in FIG. 21, in the manufacturing process of the secondary paper roll for tissue paper products according to the present embodiment, primary continuous sheets (S11, S12 in the illustrated example) fed out from a plurality of primary paper rolls by the ply means 51. Are laminated along the continuous direction to form a laminated continuous sheet S2 (lamination step), and a chemical solution is applied by a pair of secondary chemical solution applying means 53 arranged in parallel in the vertical direction with respect to the laminated continuous sheet S2 ( Chemical solution application step), smoothing treatment by a pair of calender means 52 (smoothing step), applying contact embossing by the contact embossing means 54 to the smoothed laminated continuous sheet S2 (contact embossing step), slit By means 55, the laminated continuous sheet S2 is slit so as to have a product width of tissue paper or multiple widths thereof (slit process), and then And winding the laminated continuous sheet S2, the slit coaxially a plurality of secondary master roll R of product width or a multiple width of tissue paper in slitting step, formed by the winding means 56.
In addition, when manufacturing the tissue paper product to which the chemical solution is not applied at the manufacturing facility X4 for the secondary paper roll for tissue paper product, the laminated continuous sheet S2 is contacted from the calendar means 52 as shown by a two-dot chain line in FIG. It is only necessary to transfer to the embossing means 54 and flow the laminated continuous sheet S2 without passing through the secondary chemical solution applying means 53.

[Fifth tissue paper product secondary roll roll manufacturing equipment and manufacturing process]
As shown in FIG. 22, the pair of calendar means 52 can be arranged along the vertical direction, and the pair of secondary chemical solution applying means 53 can be arranged along the vertical direction.
The manufacturing process of the secondary paper roll for tissue paper products using the manufacturing equipment X5 for the secondary paper roll for tissue paper products is as follows.
As shown in FIG. 22, in the manufacturing process of the secondary paper roll for tissue paper products according to the present embodiment, primary continuous sheets (S11, S12 in the illustrated example) fed out from a plurality of primary paper rolls by the ply means 51. Is laminated along the continuous direction to form a laminated continuous sheet S2 (lamination step), and the laminated continuous sheet S2 is smoothed by a pair of calendar means 52 (smoothing step), and the laminated continuous sheet S2 Then, a chemical solution is applied by a pair of secondary chemical solution applying means 53 (chemical solution applying step), contact embossing is applied to the laminated continuous sheet S2 by the contact embossing means (contact embossing step), and lamination is continuously performed by the slit means 55. The sheet S2 is slit so as to have a product width of tissue paper or a multiple of the width (slit process), and then slit And winding the laminated continuous sheet S2, the slit coaxially a plurality of secondary master roll R of product width or a multiple width of tissue paper in extent, formed by the winding means 56.
In addition, when manufacturing the tissue paper product to which the chemical solution is not applied at the manufacturing facility X5 for the secondary paper roll for tissue paper product, the laminated continuous sheet S2 is contacted from the calendar means 52 as shown by a two-dot chain line in FIG. It is only necessary to transfer directly to the embossing means 54 and flow the laminated continuous sheet S2 without passing through the secondary chemical solution applying means 53.

  Next, using the secondary web roll R of 2-ply winding produced in the production process of the secondary web roll X1 for tissue paper products shown in FIG. 1 and FIG. A tissue paper product (Example) was manufactured by setting in a multi-stand type interfolder.

<Forms of Examples, Comparative Examples, and Reference Examples>
In Example 1, a primary chemical solution was applied by a flexographic printing method, and then a secondary chemical solution was applied by a flexographic printing method. Primary chemical solution application: 1.0 g / m ² per side. Secondary chemical application: 1.0 g / m ² per side. Accordingly, the chemical application amount in the total of two plies is 4.0 g / m ² .
In Example 2, a primary chemical solution was applied by a flexographic printing method, and then a secondary chemical solution was applied by a flexographic printing method. Primary chemical solution application: 0.6 g / m ² per side. Secondary chemical application: 1.4 g / m ² per side. Accordingly, the chemical application amount in the total of two plies is 4.0 g / m ² .
In Example 3, the first chemical solution was applied by the flexographic printing method, and then the second chemical solution was applied by the flexographic printing method. Primary chemical solution coating: 1.6 g / m ² per side. Secondary chemical solution application: 0.4 g / m ² per side. Accordingly, the chemical application amount in the total of two plies is 4.0 g / m ² .
In Reference Example 1 , a primary chemical solution is applied by a gravure printing method, and then a secondary chemical solution is applied by a flexographic printing method. Primary chemical solution application: 1.0 g / m ² per side. Secondary chemical application: 1.0 g / m ² per side. Accordingly, the chemical application amount in the total of two plies is 4.0 g / m ² .
In Reference Example 2 , a primary chemical solution is applied by a gravure printing method, and then a secondary chemical solution is applied by a gravure printing method. Primary chemical solution application: 1.0 g / m ² per side. Secondary chemical application: 1.0 g / m ² per side. Accordingly, the chemical application amount in the total of two plies is 4.0 g / m ² .
In Comparative Example 1, a chemical solution was applied only once by a flexographic printing method with a ply machine without applying a two-step chemical solution. The coating amount is 2.0 g / m ² per side, and the chemical application amount in the total of two plies is 4.0 g / m ² .
In Comparative Example 2, the primary chemical solution was applied by a flexographic printing method on a ply machine at a coating amount of 1.0 g / m ² per side (2.0 g / m ^{2 on} both sides), followed by flexo printing. The secondary chemical solution application by the method is performed by a two-step application method in which the application amount is 1.0 g / m ² per side (2.0 g / m ^{2 on} both sides). The chemical application amount in the total of two plies is 4.0 g / m ² .

<Other conditions>
The pulp composing the base paper was NBKP 30% and LBKP 70%. Further, a crepe rate of 19% was used. About each Example and each comparative example, the chemical | medical solution of the same composition was prepared so that a viscosity might be 110 mPa * s (40 degreeC).
Reference Example 1 is a non-humidifying general-purpose tissue paper marketed by the applicant, and Reference Example 2 is a lotion-type tissue paper marketed by the applicant, while Reference Example 3 and Reference Example 4 are commercially available from other companies. Because it is a product, it contains unknown content.

Each parameter shown in the table is as follows.
Measured according to JIS P 8124 (1998). In the case of a two-ply tissue product, the average weight of a 2-ply sheet is listed.
Paper thickness: Measured under the condition of JIS P 8111 (1998) using a dial thickness gauge (thickness measuring instrument) “PEACOCK G type” (manufactured by Ozaki Seisakusho) (JIS P 8118 (1998)) According to the above).
Product density: The product density is the paper (2 ply) of tissue paper by “PEACOCK G type”, which is a doubled value (C) of the tissue paper product tsubo conditioned under JIS P 8111 conditions. The value is divided by the thickness (D), and the unit is expressed in g / cm ³ and three decimal places.
Dry tensile strength: Measured according to the tensile test method of JIS P 8113 (1998).
Wet tensile strength: Measured according to JIS P 8135 (1998).
Elongation ratio: Measured using Minebea Co., Ltd. “Universal Tensile Compression Tester TG-200N”.
Softness: Measured based on the handle ohm method according to JIS L1096 E method. However, the test piece was 100 mm × 100 mm in size, and the clearance was 5 mm. The measurement was performed 5 times each in the vertical direction and the horizontal direction with 1 ply, and the average value of all 10 times was defined as one decimal point and expressed in units of cN / 100 mm.
Coefficient of static friction: Measured by the following method according to JIS P 8147 (1998). Stick the tissue paper peeled on one ply to the acrylic plate so that the front side of the paper is on the outside. Wrap tissue paper around a 100 g weight with 2 plies and place it on the tissue on the acrylic plate. Tilt the acrylic plate and measure the angle at which the weight slides down. The angle is measured 8 times, the average angle is calculated, and the tangent value is taken as the static friction coefficient.
MMD is an average deviation MMD of the static friction coefficient. MMD is one of the indices of smoothness. The smaller the numerical value, the smoother, and the larger the numerical value, the less smooth. As a method for measuring the MMD value, as shown in FIG. 23A, a tension of 20 g / cm is applied to the contact surface of the friction element 212 in a predetermined direction (downward and rightward in FIG. 23A). While being brought into contact with the surface of the tissue paper 211, which is the measured sample, at a contact pressure of 25 g, it is moved 2 cm at a speed of 0.1 cm / s in the same direction as the direction in which the tension is applied. The friction coefficient at this time was measured using a friction feeling tester KES-SE (manufactured by Kato Tech Co., Ltd.), and the value obtained by dividing the friction coefficient by the friction distance (movement distance = 2 cm) was defined as the MMD value. The friction element 212 includes 20 piano wires P having a diameter of 0.5 mm adjacent to each other, and has a contact surface formed so that the length and the width are both 10 mm. The contact surface is formed with a unit bulging portion whose tip is formed of 20 piano wires P (curvature radius 0.25 mm). FIG. 23 (a) schematically shows the friction element 212, and FIG. 23 (b) shows an enlarged view of a portion surrounded by a dashed line in FIG. 23 (a).
Moisture content: Measured according to JIS P 8111 (1998).
Chemical solution content: The chemical solution application amount indicates the content of the chemical component in a dry state (absolutely dry) included in the unit area of tissue paper in the standard state of JIS P 8111. The content of components other than moisture in the chemical solution shall be indicated. The unit area of the tissue paper is an area of the plyed sheet viewed from a viewpoint perpendicular to the plane, and does not mean the total area of each plyed sheet and its front and back surfaces.
Chemical solution content ratio: Chemical solution application rate means that the tissue paper product with a predetermined mass conditioned under JIS P 8111 conditions is the denominator (A) (g), and the chemical solution contained in the tissue paper product with the predetermined mass The ratio of (B) divided by (A) is expressed as (%), with the mass (B) (g) excluding the moisture of (b) as a molecule. (Chemical solution content%) = (B) ÷ (A) × 100 (%)
Sensory evaluation: Examples 1 to 3, Reference Examples 5 and 6, Comparative Example 1 and Reference Examples 1 to 4 were targeted at 87 consumers, with a softness, a smoothness, a feeling of thickness and a moist feeling as follows. Sensory evaluation based on the criteria was performed.
The evaluation criteria are “3” for all the results of the non-humidifying general-purpose tissue paper (Comparative Example 1) to which no chemical solution is applied, and “5”, “ “4” for those who felt “excellent”, “3” for those who felt “equivalent to the standard”, “2” for those who felt “inferior”, “notably inferior” The thing was set to “1”. In addition, the tissue-coated tissue paper is also evaluated for the presence or absence of a sticky feeling, and the evaluation criteria are “○” for “less sticky” and “×” for “obviously sticky”. did.
Furthermore, variation in sensory evaluation refers to whether each sensory evaluation is stable in the width direction and the flow direction, in the width direction and the flow direction of the sheet, and the sampling position of the sample provided to the 87 consumers. It was investigated by correlation. The evaluation is based on the stability in the width direction and the flow direction of each sensory evaluation in Comparative Example 1, and in the case of Comparative Example 1, “1” is excellent, “2” is excellent, and “3” is remarkably excellent. ".

In comparison between the example and the comparative example 1, it can be seen that the example has less variation in sensory evaluation. In addition, when compared in Examples 1-5, it turns out that it is desirable for the application amount in a primary chemical | medical solution application means and a secondary chemical | medical solution application means to be 0.5-1.5 g / m < ² >.

As is apparent from the above description, the present specification and drawings also disclose the following invention.
[Invention 1]
A method for producing a secondary web roll for tissue paper products, wherein a plurality of secondary web rolls for tissue paper products are continuously produced from the primary web roll,
Laminating means for laminating a primary continuous sheet fed from a plurality of primary raw rolls along the continuous direction to form a laminated continuous sheet;
A primary chemical solution applying means for applying a chemical solution to each of the continuous sheets by a flexographic printing method or a gravure printing method;
Thereafter, a secondary chemical solution applying means for applying a chemical solution to each continuous sheet by a flexographic printing method or a gravure printing method,
Slitting means for slitting the laminated continuous sheet so as to be a product width of tissue paper or a multiple of the width,
Winding means for winding each slit laminated continuous sheet on the same axis to form a plurality of secondary rolls of the product width of the tissue paper or a multiple of the width, and tissue paper products, Secondary roll roll manufacturing equipment.

[Invention 2]
The secondary raw material roll for tissue paper products according to claim 1, wherein the primary chemical solution applying means and the secondary chemical solution applying means are provided after the laminating means and before the slit means. Manufacturing equipment.

[Invention 3]
The manufacturing apparatus of the secondary raw material roll for tissue paper products of Claim 2 which has a smoothing means which smoothes with a calender between the said lamination | stacking means and the said 1st chemical | medical solution application means.

[Invention 4]
The tissue paper product according to claim 2, further comprising contact embossing means for applying line-shaped contact embossing for preventing delamination of the laminated continuous sheet between the secondary chemical solution applying means and the slit means. Secondary roll roll manufacturing equipment.

[Invention 5]
A plurality of the secondary web rolls obtained by the invention of any one of the above inventions are prepared, and these are arranged along the line direction in a multi-stand type interfolder, and a plurality of secondary rolls fed out from each secondary web roll The secondary continuous sheet is transported along the continuous direction and stacked while being folded in the transport process, and then a predetermined number of laminated sheets are cut to a predetermined length to form a tissue paper bundle. An apparatus for producing tissue paper products characterized by storing.

  INDUSTRIAL APPLICABILITY The present invention can be applied to the manufacture of secondary rolls for tissue paper products used in multi-stand type interfolders and the manufacture of tissue paper products using multi-stand type interfolders.

40 ... Primary chemical application (primary chemical application process)
51... Ply means (lamination process)
52 ... Calendar means (smoothing process)
53 ... Secondary chemical solution application means (secondary chemical solution application step)
54 ... Contact embossing means (contact embossing process)
55 ... Slit means (slit process)
56: Second winding means (secondary roll roll winding step)
115 ... Yankee dryer (drying process)
119: First winding means (first winding step)
40 ... Chemical spraying means (chemical spraying process)
190 ... water extraction means (water extraction process)
W ... wet paper S1 ... dry paper S11, S12 ... primary continuous sheet S2 ... laminated continuous sheet JR ... primary web roll R ... secondary web roll

Claims (4)

Producing a plurality of secondary web rolls for setting in the multi-stand type interfolder from the primary web roll;
Set the secondary web roll in the multi-stand type interfolder, feed the secondary continuous sheet from the set secondary web roll, and fold it so that the side edges of the adjacent secondary continuous sheets are crossed together Laminating and producing a laminated strip,
By cutting laminated strip has a perforation in the upper surface, is opened by breaking the perforation, and have a, a step of accommodating the storage box is covered by a film of said opening has a slit , When the top tissue paper is pulled out from the slit, the side edge of the next tissue paper is pulled out ,
The process of manufacturing the said secondary raw fabric roll,
A lamination step in which a primary continuous sheet fed from a plurality of primary fabric rolls is laminated along the continuous direction to form a laminated continuous sheet;
From both sides of the continuous sheet, an aqueous chemical solution containing 70 to 90% by mass of a polyol having moisture retention, 1 to 15% by mass of moisture, and 0.01 to 22% by mass of a functional chemical is obtained by flexographic printing. A primary chemical solution application step of applying 0.5 to 1.5 g / m ² to each continuous sheet constituting the sheet ;
From both sides of the laminated continuous sheet that has undergone the first chemical solution coating process, 70 to 90 mass% of a polyol having moisture retention, 1 to 15 mass% of moisture, and 0.01 to 22 mass% of a functional chemical are obtained by flexographic printing. A secondary chemical solution application step of applying an aqueous chemical solution containing 0.5 to 1.5 g / m ² to each continuous sheet constituting the continuous sheet ;
A slitting process for slitting the laminated continuous sheet so as to be a product width of tissue paper or a multiple of the width,
A winding process of winding each slit continuous sheet coaxially to form a product width of the tissue paper or a plurality of secondary rolls having a plurality of widths of the tissue paper. Production method.   The method for producing a tissue paper product according to claim 1, wherein the primary chemical solution application step and the secondary chemical solution application step are performed after the lamination step and before the slit step.   The manufacturing method of the tissue paper product of Claim 2 which has a smoothing process of smoothing with a calender between the said lamination | stacking process and the said 1st chemical | medical solution application | coating process.   The tissue paper product according to claim 2, further comprising a contact embossing step for applying a line-shaped contact embossing for preventing delamination of the laminated continuous sheet between the second chemical solution applying step and the slitting step. Manufacturing method.

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