JP5833293B2 - Tissue paper manufacturing method - Google Patents

Description

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

  A box of tissue paper is generally obtained by stacking multiple 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).

  As examples of such interfolders, multi-stand type interfolders as disclosed in Patent Documents 1 and 2 below, and rotary interfolders as disclosed in Patent Documents 3 and 4 below are 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 2007-24565 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 that, when manufacturing tissue paper products using a multi-stand type interfolder, minor modifications of existing equipment are sufficient without requiring major equipment modifications, and a single multi-stand unit is required. An object of the present invention is to provide a method for producing a tissue paper product that is easy to switch between a tissue paper product to which a chemical solution is applied and a tissue paper product to which no chemical solution is applied.
On the other hand, mixing of paper dust is suppressed, so that a chemical solution can be stably applied.

Means for solving the above problems and their effects 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;
Chemical solution application for providing a chemical solution for making a moisturizing tissue 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 with respect to the laminated continuous sheet. Process,
A slitting process for slitting the laminated continuous sheet to which the chemical solution is applied to the product width of tissue paper or a multiple of the product width;
Winding the slits each laminated continuous sheet coaxially to form a plurality of secondary rolls of tissue paper product width or multiple times the width simultaneously,
The method for producing tissue paper products, wherein the chemical solution application step is a step of jetting a chemical solution in an ink jet format, and the chemical solution is sprayed on each surface of the laminated continuous sheet by an ink jet format to respectively apply the chemical solution.

[Invention of Claim 2]
Between the chemical solution application step and the slit step, a lamination step is provided between the receiving roll and the roller, and a joining step for forming a line-shaped joining portion that prevents delamination on the lamination continuous sheet is provided,
The chemical solution application step is a step of applying a chemical solution by at least two chemical solution application units that eject the chemical solution in an ink jet format, and one chemical solution application unit is located on the side of the sheet in contact with the roller, and the other chemical solution application The tissue paper manufacturing method according to claim 1, wherein the portion is located on the other sheet side, and the amount of application of one chemical solution application unit is less than the application amount of the other chemical solution application unit.

[Invention of Claim 3]
An ink jet head is used in which the chemical liquid is jetted in the chemical liquid application step and is ejected.
This inkjet head
A nozzle plate provided with a plurality of nozzle holes arranged side by side;
A fluid chamber for temporarily storing a chemical for ejection from the nozzle hole;
A diaphragm disposed in a portion facing the nozzle plate across the fluid chamber;
A piezoelectric element disposed in the fluid chamber in contact with the diaphragm;
The tissue paper manufacturing method according to claim 1 or 2, characterized by comprising:

In the manufacturing method according to the present invention, many secondary paper rolls for tissue paper products manufactured so as to have a product width of tissue paper or a multiple of the width of tissue paper in the slit process are set in a multi-stand type interfolder in this subsequent stage. The 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 this invention, a chemical | medical solution is provided with respect to the lamination | stacking continuous sheet in the manufacturing process of the secondary raw material roll for tissue paper products. For this reason, compared with the case where a chemical | medical solution application | coating process is provided separately from a ply machine and a multi-stand type | system | group interfolder, while being able to hold down an installation cost and being able to reduce a manufacturing process, it leads to the efficiency at the time of manufacture. Moreover, when manufacturing the tissue paper product which does not provide a chemical | medical solution, since it is only necessary to abbreviate | omit a chemical | medical solution application | coating process from the manufacturing process of the secondary raw material roll for tissue paper products, switching of an installation can be performed easily.

  In the manufacturing process of the secondary raw material roll for tissue paper products according to the present invention, the chemical solution coating process is preferably performed after the laminating process and before the slitting process. Because, if the chemical solution application step is before the lamination step, equipment for applying the chemical solution to each primary continuous sheet must be provided, and on the other hand, after the slit step, the slit step Since the chemical solution is applied to the laminated continuous sheet divided into a plurality by the chemical solution, the chemical solution leaks from the slit portion, causing the roll to become dirty and cause paper breakage. If the chemical solution application process is performed between the laminating step and the slitting process, it is only necessary to prepare equipment for applying the chemical solution only to the laminated continuous sheet that is not divided by the slitting process. This is because the operation is stable because there is little paper break.

  In this case, according to the present invention, the chemical solution application step is a step of injecting the chemical solution in an ink jet format, and accordingly, the chemical solution is applied to each surface of the laminated continuous sheet by the ink jet format to respectively apply the chemical solution. It will be. Therefore, according to the ink jet format, since it can be applied in a non-contact and uniform manner, it becomes less likely to wrinkle the laminated continuous sheet than when using a metal roll or a spray method as in gravure printing, and It becomes possible to apply uniformly in the width direction.

  In the present invention, in the chemical solution application step, the amount of application can be stabilized along the width direction and the flow direction of the laminated continuous sheet by spraying the chemical solution onto the laminated continuous sheet by an ink jet method. In addition, even if the processing speed is high, the application amount is stable, so that it is possible to avoid making a weak part in the sanitary thin paper, and high-speed application and processing are possible.

On the other hand, chemical application by printing methods such as gravure printing is a roll transfer that brings a plate into contact with paper, and it is applied in the flow direction and width direction by changing the physical properties of the chemical liquid due to temperature change, paper dust mixing, or shearing force. Variations in quantity occur. In addition, in spray coating, since the chemical liquid particles are ejected from the nozzle in a fan shape, it is devised to uniformly apply using a plurality of nozzles, but it is difficult to obtain sufficient uniformity in the width direction. As the amount of application in the flow direction and width direction varies, the elongation of the paper differs in the flow direction and width direction. In the printing method and spray coating, the adjustment for improving such winding deviation and raw fabric defect is basically limited due to the principle of the coating method.
On the other hand, with the ink jet system that can control whether or not to eject the particles ejected from the nozzle in units of one by electronic control, it is possible to easily and instantaneously adjust the coating amount in the width direction and the flow direction. This is more advantageous than printing and spray coating.
Furthermore, depending on the quality of the secondary material before coating, it is adjusted for each ply material roll or even during the ply roll chemical application so that the quality after coating is uniform in the flow direction and width direction. It is possible to obtain a more uniform product quality.

Moreover, in Claim 2, although the joining process which forms the line-shaped junction part which prevents delamination with respect to a lamination | stacking continuous sheet exists between a chemical | medical solution application process and a slit process, this joining process is carried out. In carrying out, the laminated continuous sheet is bonded with the laminated continuous sheet sandwiched between the receiving roll and the roller.
In addition, as a joining process for preventing delamination with respect to the laminated continuous sheet, means such as crimping or adhesion may be used. However, the joining process is performed, for example, by providing line-shaped contact embossing on the laminated continuous sheet. It may be a contact embossing process. When such a contact embossing process exists between the chemical solution application process and the slit process, the contact embossing process is performed by sandwiching the laminated continuous sheet between the receiving roll and the roller. It will be embossed.

Here, when the contact embossing process as an example of the joining process is performed before the chemical solution application process, the chemical solution is applied in a state where the contact embossed portion and the non-applied portion of the laminated continuous sheet are formed. . For this reason, unevenness occurs in the amount of the chemical solution applied, a difference occurs in the elongation rate between the portion where the chemical solution is applied abundantly and the portion where the chemical solution is applied a little, and the tissue paper product becomes wrinkled and looks bad.
In addition, when the contact embossing step is after the slitting step, contact embossing is given to the laminated continuous sheet having a slit in the product width. As a result of (2 lines) contact embossing being performed, it becomes easier to cut the paper as compared with contact embossing with the full width of the line not slitting.

  On the other hand, as described above, the chemical solution application step is a step of ejecting a chemical solution by an ink jet method. In this chemical solution application step, for example, a roller on the side opposite to the roller used in the joining step which is a contact embossing step. The chemical solution is applied to the laminated continuous sheet from both sides of the laminated continuous sheet, while the applied amount of the sheet in contact with the roller is reduced with respect to the applied amount of the other sheet not facing the roller. And, by winding each laminated continuous sheet slit in the slit step in the winding step coaxially with the side facing the roller as the outer peripheral side, the product width of the tissue paper or a plurality of secondary widths of the tissue paper A raw roll is formed at the same time.

Accordingly, by reducing the coating amount on the outer peripheral side of the winding drum used in the winding process to less than the coating amount on the inner peripheral surface, the secondary roll is wound without meandering during winding. be able to. In other words, since the amount of application to the surface in contact with the two winding drums used at the time of winding is reduced, this portion becomes resistance, making it difficult to slip between the two winding drums and winding without meandering It is possible to avoid the problem that the sanitary thin paper product which is wound around the drum at a high speed and becomes a secondary raw roll after the slit causes winding misalignment and becomes unusable.
On the other hand, for example, by reducing the coating amount on the surface side of the laminated continuous sheet facing the roller for contact embossing, which is a kind of bonding, with respect to the coating amount on the other surface side not facing the roller, There is an advantage that the paper is not easily torn during the contact embossing after the chemical solution coating process.
In addition, when the ink jet system is used, it is possible to apply the chemical solution by relatively reducing the amount of the chemical solution applied to the slit in the application surface in contact with the embossing roller and the width direction portion where the contact embossing is performed. In this case, it is possible to adjust the coating amount so that the paper strength after application is reduced at the slit and contact embossing portions, and the chemical solution is not transferred back to the slitter and the embossing roller. Therefore, there is a merit that it is excellent in high-speed processing suitability.

  Along with the above, a lotion agent to be used as a chemical applied to the inner surface of the secondary raw roll while the secondary raw roll is subsequently processed by the multi-stand type interfolder (8 hours or more) It transfers to the outer peripheral surface of the secondary web roll, and both the outer surfaces have uniform surface properties, and uniform tissue quality with no difference between the front and back sides can be obtained. Furthermore, since a chemical | medical solution is provided to the wide lamination | stacking continuous sheet before a slit process, the application quantity of the width direction of a lamination | stacking continuous sheet is uniform, scattering of a lotion agent is low and a yield becomes high.

  As described above, according to the manufacturing process of the secondary web roll according to the present invention, the chemical solution is applied at high speed and uniformly with the tissue paper having low paper strength to prevent, for example, tearing or paper break due to contact embossing, or roll deviation of the web. It will be possible to operate stably.

On the other hand, according to the third aspect, an ink jet head is used in which the chemical liquid is ejected in the chemical liquid coating process. In this ink jet head, as the voltage is applied, the piezoelectric element deforms the diaphragm so that the chemical solution temporarily stored in the fluid chamber is ejected from the plurality of nozzle holes of the nozzle plate. To work.
As described above, by applying a voltage to the piezoelectric element, the chemical liquid is surely injected onto the laminated continuous sheet.

It is the schematic which shows the manufacturing equipment and manufacturing method of a primary web roll. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the front. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen from the side. It is the schematic which shows an example of a multi stand type inter folder, and has shown the state seen 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 perspective enlarged view which shows one chemical | medical solution application part of the chemical | medical solution application means shown in FIG. It is an expanded sectional view which shows the inside of one chemical | medical solution application part of the chemical | medical solution application | coating 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 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.

Next, an embodiment of the present invention will be described. In the figure, the arrow HD indicates the horizontal direction, and the arrow LD indicates the vertical direction.
[Method for producing primary roll]
An example of the manufacturing method of a primary fabric roll is demonstrated referring FIG.
As shown in FIG. 1, the wet paper W that has passed through the wire part is placed on the bottom felt 111 and transferred, and thereafter, sandwiched between the top felt 110 and the bottom felt 111, between the top roll 112 and the bottom roll 113. Passed and squeezed. Thereafter, the wet paper web W squeezed is attached to the surface of the Yankee dryer 115 via the touch roll 116 while being placed on the top felt 110. Then, the wet paper W is dried by the Yankee dryer 115, peeled off by the doctor blade 117, and then wound up to be a primary raw roll JR.
In this papermaking, for example, dispersants, dry paper strength enhancers, wet paper strength enhancers, softeners, release agents, adhesives, pH adjusters such as caustic soda, antifoaming agents, preservatives, slime control agents, dyes , Etc. can be added as appropriate chemicals.
In the method of manufacturing the primary raw roll, the smoothing process can be performed by the calendar means 118 after being peeled off by the doctor blade 117.

[Production facilities for secondary rolls for tissue paper products]
As shown in FIG. 11, the production facility X1 (ply machine X1) for the secondary paper roll for tissue paper products according to the present invention includes at least two primary web rolls JR manufactured by the above-described manufacturing method or the like. The ply means 51, which can be set as described above, is formed by laminating the primary continuous sheets (S11, S12 in the illustrated example) fed from these primary raw rolls JR along the continuous direction to form a laminated continuous sheet S2. Have.

  A pair of chemical solution applying means 53 for applying a chemical solution to the laminated continuous sheet S <b> 2 flowing from the ply means 51 is provided at the subsequent stage of the ply means 51. The slit means 55 which consists of the provided several cutter and slits the lamination | stacking continuous sheet S2 conveyed from the chemical | medical solution application means 53 so that it may become the product width of tissue paper, or its multiple width | variety is arrange | positioned. 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. A soft calendar is a calendar using a roll coated with an elastic material such as urethane rubber, and a chilled calendar is a calendar made of a metal roll.
The number of calendar means 52 can be changed as appropriate. If there is a plurality of installations, it has the advantage that it can be sufficiently smoothed even if the processing speed is high.
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 as viewed from the roll axis center (a part of a circular arc of a cross section perpendicular to the axis) (hereinafter the same).
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. However, the calendar means 52 is positioned after the ply means 51 and before the chemical solution applying means 53, or after the chemical solution applying means 53 and before the contact embossing means 54. Can do.

(Medication solution application means)
In the manufacturing equipment or manufacturing process of the secondary raw material roll for tissue paper products according to the present embodiment, when the chemical solution is applied to both sides of the laminated continuous sheet S2, the total chemical application amount on both sides is 1.5 to 5. 0.0 g / m ² , preferably 2.0 to 4.5 g / m ² , more preferably 2.5 to 4.0 g / m ² . If it exceeds 5.0 g / m ² , the paper may be cut due to a decrease in paper strength or elongation, winding may occur when winding with a winding drum, or the quality may be too sticky. . If it is less than 1.5 g / m ² , the quality difference from the uncoated product such as smoothness and moistness cannot be felt.
In addition, when there is a difference in the amount of application to both application surfaces, since both application surfaces are in contact with each other during the time (8 hours or more) after being stored in the ply material after application, The amount of both chemicals is equalized and the difference between the front and back is reduced.

When the chemical solution is applied only to one side of the laminated continuous sheet S2, the application surface of the chemical solution is directed to the surface (the surface on the primary continuous sheet S11 side) located outside the secondary raw roll R in the laminated continuous sheet S2. Application is good. In this way, there is a difference between the front and the back of the product, but it is less likely to cause winding slip. In this case, the coating amount is 1.5 to 5.0 g / m ² , preferably 2.0 to 4.5 g / m ² , more preferably 2.5 to 4.0 g / m ^2. .

  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 16, of the two chemical solution applying means 53, the chemical solution applying means 53B that directly applies the chemical solution to the primary continuous sheet S11 is more than the other chemical solution applying means 53A. The chemical solution shall be applied. In this case, the ratio of the chemical solution application amount on both sides is 100: 0 to 60:40, preferably 75:25 to 60:40.

  FIG. 16A is a cross-sectional view of a laminated continuous sheet S2 laminated on 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 liquid application, before the laminated continuous sheet S2 is fully extended, the laminated layers are integrated by contact embossing CE, and cut into the product width by the slit means 55 (FIG. 16B). 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 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 (FIG. 16C). 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 on both sides unless the chemical solution is applied (FIG. 17 ( 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. 17B).

  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 application amounts are kept opposite to each other by being left standing (chemical solution penetration step, FIG. 18), the chemical components between the continuous sheets are transferred little by little ( The difference is gradually reduced during seasoning. In addition, the white arrow in FIG. 18 shows the osmosis | permeation direction of a chemical | medical solution component.

  As the type of the chemical solution applying means 53 of the present invention, an ink jet type printing method can be used. In the production equipment or production method for the secondary raw roll for tissue paper products, when the ink jet format is used as the chemical solution application means 53, the processing speed is 100 to 1000 m / min, preferably 350 to 950 m / min, particularly preferably. 450 to 950 m / min. When it is less than 100 m / min, productivity is low, and when it is more than 1000 m / min, coating unevenness occurs and the chemical solution is likely to be scattered.

In the manufacturing equipment or manufacturing process of the secondary paper roll for the tissue paper product, when the ink jet format is used as the chemical solution applying means 53, the 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, and if it is 1100 m / min or more, uneven coating occurs and the amount of chemical solution scattered increases.
In other words, the inkjet type 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.

One or a plurality of chemical solution applying means 53 using an ink jet printing method can be installed. When a plurality of chemical solution applying means 53 are installed, they may be arranged in parallel in the horizontal direction, the up-down direction, or the oblique direction, and include the horizontal direction. You may arrange | position combining these installation directions. Since the holding angle can be reduced by arranging them in the horizontal direction, the processing speed can be increased, and when they are arranged in the vertical direction, the installation space in the horizontal direction can be reduced.
The gap between the ink jet head and the paper may be in a range where the ink jet particles can reach and the paper and the head do not come into contact with each other. In consideration of obstructing the arrival of the paper, it is appropriate to set the gap to several mm to 30 mm.

  The means (calendar means 52 and contact embossing means 54 in the example of FIG. 11) arranged before and after the 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 preceding stage to the subsequent stage of the chemical solution applying unit 53, and the laminated continuous sheet S2 is not passed through the chemical solution applying unit 53. Since it only needs to pass through, it is possible to easily switch the presence or absence of chemical application. 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 flow the laminated continuous sheet S2 without passing through the chemical solution applying means 53.

<Embodiment of inkjet type>
Here, an example of printing in the inkjet format will be described.
As shown in FIG. 11 and FIG. 12, in this embodiment, one chemical solution application portion 53A of the ink jet type is opposed to a roller 54A of a contact embossing means 54 described later, and is also opposed to the winding drum 56A described above. It is located on the surface side of the continuous sheet S2. The chemical solution application unit 53A has a tank 61A containing a chemical solution, and the tank 61A is connected to an inkjet head 62A capable of ejecting the chemical solution via a pipe. Accordingly, the chemical liquid is supplied from the tank 61A to the ink jet head 62A by a supply pump (not shown).

As shown in FIG. 13, a plurality of nozzle holes 64 are linearly formed in a portion facing the laminated continuous sheet S2 which is a material to be coated of the ink jet head 62A so as to correspond at least to the width of the laminated continuous sheet S2. In this structure, nozzle plates 63A provided side by side are arranged.
As shown in FIG. 14, a plurality of ejection units 65 are arranged in the inkjet head 62A so as to correspond to the respective nozzle holes. That is, the injection unit 65 includes a fluid chamber 66 that temporarily stores a chemical solution to be ejected from the nozzle hole 64, and a vibration plate 67 that is disposed at a portion facing the nozzle plate 63 across the fluid chamber 66. The piezoelectric element 68 is disposed outside the diaphragm 67 in contact with the diaphragm 67 and formed by a piezoelectric element or the like.

  The vibration plate 67 is formed of a metal plate material such as stainless steel, and has a structure that easily transmits vibration from the piezoelectric element 68 to the fluid chamber 66. Further, a control device (not shown) is connected to the piezoelectric element 68 via a wiring, and a voltage is applied to the piezoelectric element 68 from the control device at a predetermined interval.

  Accordingly, the chemical solution supplied from the tank 61A to the ink jet head 62A is sent into the fluid chamber 66 that exists corresponding to each nozzle hole 64, and the control device applies a voltage to the piezoelectric element 68 as necessary. As a result, the chemical solution is sprayed from the nozzle holes 64 all at once, and accordingly, the chemical solution is applied over the entire width of one surface of the laminated continuous sheet S2.

  On the other hand, as shown in FIGS. 11 and 12, in the present embodiment, the other chemical solution application portion 53B, which is also of the ink jet type, is not opposed to a roller 54A of a contact embossing means 54 described later, and the winding described above. It is located on the other surface side of the laminated continuous sheet S2 that is not opposed to the drum 56A. The chemical solution application unit 53B has a tank 61B containing a chemical solution, and the tank 61B is connected to an inkjet head 62B capable of ejecting the chemical solution via a pipe. Along with this, a chemical solution is supplied from the tank 61B to the ink jet head 62B by a supply pump (not shown).

A plurality of nozzle holes 64 are linearly arranged in a portion of the inkjet head 62B facing the laminated continuous sheet S2, which is a material to be coated, at least corresponding to the width of the laminated continuous sheet S2. The nozzle plate 63B is arranged in the same manner as described above. In the ink jet head 62 </ b> B, a plurality of ejection units having the same structure as the ejection unit 65 described above are arranged corresponding to the nozzle holes 64.
Therefore, the chemical liquid supplied from the tank 61B to the inkjet head 62B is sprayed from the nozzle holes 54 at the same time as described above, and this chemical liquid is spread over the entire width of the other surface of the laminated continuous sheet S2. Will be applied.

  As described above, 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 chemical solution application unit 53A applies the surface side of the laminated continuous sheet S2 facing the roller 54A. The chemical solution can be applied to the laminated continuous sheet S2 from both sides of the laminated continuous sheet S2 while reducing the amount with respect to the application amount on the other surface side by the chemical solution application unit 53B.

Here, as described above, the total coating amount on both sides is set to 1.5 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 of 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 lotion agent on both sides of the paper is 50% when it is 20% or more of the whole. The specific value varies within the above range because the optimum conditions differ depending on the balance between the slip and quality of the secondary raw roll R, the sheet thickness, the permeability of the lotion agent, and the transferability.

  Therefore, according to this embodiment, it is possible to stabilize the coating amount even when the processing speed is high by using an ink jet printing method, and stably apply a wide range of chemical viscosity with one roll. Will be able to. Specifically, the application is also performed when the lotion agent to be used as a chemical solution is applied at a coating amount within the range described below while the laminated continuous sheet S2 is set to 700 m / min or more, preferably at a speed of 900 m / min or more. Is uniform and the laminated continuous sheet S2 can be wound without meandering.

  In the above-described embodiment, the ink jet type has a structure in which a piezo element is adopted in an on-demand manner, but a thermal jet type may be adopted. Further, instead of the on-demand method, a continuous-type injection device capable of continuous injection may be employed.

(Medical solution)
About the chemical | medical solution to apply | coat, a viscosity shall be 1-700 mPa * s at 40 degreeC from a viewpoint of performing high-speed processing. More preferably, it is set to 50 to 400 mPa · s (40 ° C.). The components of the chemical solution include 70 to 90% polyol, 1 to 15% moisture, and 0.01 to 22% functional chemical.
The polyol includes 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, one of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. A moisturizing agent such as any combination can be added.
Deodorants such as flavors, emollients such as various natural extracts, vitamins, emulsifiers that stabilize compounding ingredients, antifoaming agents, antifungal agents, organic acids, etc. An agent 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.

(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. 15, 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.

(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 in terms of texture and the like, it may be composed only of NBKP and LBKP, 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 in the continuous direction to form a laminated continuous sheet S2 (laminating step), and a chemical solution is applied to the laminated continuous sheet S2 by a pair of chemical solution applying means 53 (chemical solution applying step), and laminated by the slit means 55. The continuous sheet S2 is slit so as to have a product width of tissue paper or a multiple of the width of the tissue paper (slit process), and then the laminated continuous sheet S2 slit in the slit process is coaxially wound to produce the product width of the tissue paper or A plurality of secondary raw rolls R having a multiple width are 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 cutting the laminated continuous sheet S2 increases, and the chemical application step is performed by the chemicals from the ink jet type chemical application units 53A and 53B. Since application by spraying tends to become unstable, application unevenness may occur.

[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 raw roll R has slits in the width of the tissue paper in the manufacturing equipment and manufacturing process of the secondary raw roll for tissue paper products described above. 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.

In addition, after printing the chemicals by the inkjet printing method as described above, it is folded at the PCMC type interfolder to produce tissue paper that is low in cost and high in productivity compared to printing with the rotary type interfolder. become able to. On the other hand, unlike the above-described embodiment, an inkjet type coating apparatus may be disposed immediately before the interfolder, and immediately after coating by the inkjet type coating apparatus, it may be overlapped and folded by the interfolder.
In this case, as a result of folding in a state where there is a large amount of chemical on the printing surface and not penetrating the opposite surface, there is little decrease in paper strength, and tearing is less likely to occur. Along with this, operational problems in the post-process are reduced.

  On the other hand, as in this embodiment, by applying the ink jet method, not only design printing, but also the chemical solution is printed on the laminated continuous sheet S2, so it is smooth and soft compared to conventional lotion tissue paper. Thus, a lotion tissue paper having a strong CD-direction paper in FIG. 6 can be obtained.

  Next, a tissue paper product (Example) is manufactured with the above-mentioned multi-stand type interfolder using the secondary material roll manufactured by the manufacturing method of the secondary material roll X1 for tissue paper products shown in FIG. In comparison with the comparative example.

(About Table 1 and Table 2)
The comparative examples in Tables 1 and 2 are all commercially available products, Comparative Example 1 is a non-humidifying general-purpose tissue paper, Comparative Examples 2, 5, and 6 are moisturizing tissue papers, and Comparative Examples 7 and 8 are non-humidifying systems. It is a high-quality tissue paper with a large paper thickness. Comparative Example 3 is a tissue paper sample in which the oily component in the chemical solution is larger than specified, and Comparative Example 4 is a tissue paper sample in which the content of silicones in the chemical solution is larger than specified.

Each parameter shown in Table 1 and Table 2 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 rate: Measured using Minebea Co., Ltd. “Universal Tensile and 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.
Water absorption: “Water absorption” described in JIS S-3104, which is the number of seconds that a certain amount of water is absorbed on the tissue surface. The surface on both sides of the tissue is measured 5 times, and the average of the total 10 measurements is expressed in seconds.
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. 19A, 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. 19A). 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. 19A schematically shows the friction element 212, and FIG. 19B shows an enlarged view of a portion surrounded by an alternate long and short dash line in FIG. 19A.
Moisture content: Measured according to JIS P 8111 (1998).

Chemical solution content: Chemical solution application amount refers to the content of a chemical component in a dry state (absolutely dry) included in the unit area of tissue paper in the standard state of JIS P 8111. Specifically, it was applied 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 rate: The chemical solution application rate means that the tissue paper product of a predetermined mass conditioned under JIS P 8111 conditions is the denominator (A) (g), and the chemical solution contained in the tissue paper product of 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: For Examples 1 to 4 and Comparative Examples 1 to 4, 7 and 8, targeting 87 consumers, sensory evaluation based on the following criteria for softness, smoothness, thickness, moist feeling (Table 1). In addition, for Examples 1 to 4 and Comparative Examples 1, 2, 5, and 6, a sensory evaluation was performed for 12 persons separately (Table 2).
The evaluation criteria are “3” for all non-moisturizing general-purpose tissue papers that are not coated with chemicals, and “5” for those that felt “excellent”. "4" for what I felt, "3" for what I felt "equivalent to the standard", "2" for what I felt "inferior", "1" for what I felt "notably inferior""
Furthermore, for chemical-coated tissue paper, the presence or absence of a sticky feeling is also evaluated, and the evaluation criteria are “○” for “less sticky” and “×” for “obviously sticky”. did.

As can be seen from the results in Tables 1 and 2, the tissue paper product manufactured in the multi-stand type interfolder using the secondary raw roll manufactured in the manufacturing process of the secondary raw roll for tissue paper products. Showed higher values of dry tensile strength and wet tensile strength in the CD direction than commercial moisturizing tissues. The wet tensile strength in the CD direction was higher than that of conventional general-purpose tissue paper. Further, the water absorption was significantly lower than those of Comparative Examples 3 and 4 having a large amount of the water repellent component of the drug and the commercially available moisturizing tissue, and was close to that of the non-humidifying tissue.
In the sensory evaluation, it was found that the tissue paper according to the present invention has a softness and plumpness equivalent to or higher than those of the conventional moisturizing tissue, while the sticky feeling seen in the moisturizing tissue is reduced.

(About Table 3)
A base paper (primary continuous sheet) and a chemical solution were produced under the following conditions, and a base paper elongation test (Test 1) and tissue paper product performance comparison test (Test 2) were conducted. In addition, about each parameter shown in Table 3, about the same parameter as each parameter shown in Table 1 and Table 2, description is abbreviate | omitted.
Coating amount: The coating amount was calculated by the difference between each sheet basis weight when the chemical solution after ply was not applied during operation and each sheet basis weight immediately after the corresponding application.
(Coating amount g / m ²⁾ = (basis weight g / m ² immediately after coating) - (the basis weight g / m ² in the case of not applying)
The coating amount of both surface layers or the total coating amount of both surfaces is the total coating amount per unit area of the plyed tissue paper sheet, and the coating amount of each sheet is added.

<Base paper>
The pulp constituting the base paper was NBKP 50% and LBKP 50%. Moreover, the base paper before ply processing was used with a basis weight of 13.5 g / m ² , a thickness of 150 μm (1 ply), and a crepe rate of 19%.

<Chemical solution>
The chemical solution was prepared such that the viscosity was 300 mPa · s (40 ° C.).

<Performance comparison of tissue paper>
The performance test was implemented about the Example and comparative example of the tissue paper manufactured by the following method.
Example: by laminating a continuous sheet composed of the base paper has a two-layer, 1.7 g / m ² on one surface, a chemical 2.3 g / m ² was coated on the other surface, after applying the contact embossed Winding and standing for 24 hours were performed.
Comparative Example: After applying the chemical solution with an offline coating apparatus, 15 hours later, the continuous sheets were stacked to form two layers, and contact embossing was applied. The chemical coating amount was 4.0 g / m ^{2 on} both sides.
Table 3 shows the results of performance evaluation and sensory evaluation of the tissue papers of Examples and Comparative Examples. The method of performance evaluation and sensory evaluation is as follows.

<Web bulk>
A plastic plate having a weight of 30 g and a size of 130 mm × 250 mm was placed on the tissue paper bundle, and the height of the four corners was averaged to obtain the web bulk.
<Softness>
It measured according to a handle ohm meter method (JIS L 1096E).

<Sensory evaluation>
About the tissue paper which concerns on an Example and a comparative example, the sensory evaluation regarding softness, a feeling of thickness, and comprehensive evaluation was performed. The sensory evaluation was performed in five stages, and the judgment criteria were as follows. The sensory evaluation values shown in Table 3 are average values of sensory evaluations by 15 inspectors.
<soft>
5 ... Very soft.
4 ... Softer than the average softness expected as tissue paper coated with chemicals.
3 ... It has an average softness expected as a tissue paper coated with a chemical solution.
2 ... Harder than the average softness expected as tissue-coated tissue paper.
1 ... I feel the hardness.
<Thickness>
5 ... A remarkable thickness is felt.
4 ... Feels thicker than the average thickness expected as a tissue paper coated with chemicals.
3 is an average thickness expected as tissue-coated tissue paper.
2 ... It feels thinner than the average thickness expected as a chemical-coated tissue paper.
1 ... I feel thin.
<Comprehensive evaluation>
5: Very good feeling of use.
4 ... It is a favorable feeling of use.
3 is an average feeling of use expected as a tissue paper coated with a chemical solution.
2 ... The feeling of use is slightly inferior to the average feeling of use expected as tissue paper coated with chemicals.
1 ... The feeling of use is bad.

  As shown in Table 3, when Examples and Comparative Examples, which are two-ply tissue papers, are compared, the paper thickness and web bulk are significantly higher in Examples even though the rice paper is almost the same. Indicated. Furthermore, the example was shown to be more flexible. Also in the sensory evaluation, the results of the examples exceeded the comparative examples in all of the softness, the feeling of thickness, and the comprehensive evaluation.

  The present invention can be applied to the production of a secondary roll for tissue paper products used in a multi-stand type interfolder.

51... Ply means (lamination process)
52 ... Calendar means (smoothing process)
53 ... Chemical solution application means (chemical solution application process)
54 ... Contact embossing means (contact embossing process)
55 ... Slit means (slit process)
56 ... Winding means (winding process)
S11, S12 ... primary continuous sheet S2 ... laminated continuous sheet JR ... primary raw roll R ... secondary raw roll

Claims (3)

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;
Chemical solution application for providing a chemical solution for making a moisturizing tissue 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 with respect to the laminated continuous sheet. Process,
A slitting process for slitting the laminated continuous sheet to which the chemical solution is applied to the product width of tissue paper or a multiple of the product width;
Winding the slits each laminated continuous sheet coaxially to form a plurality of secondary rolls of tissue paper product width or multiple times the width simultaneously,
The method for producing tissue paper products, wherein the chemical solution application step is a step of jetting a chemical solution in an ink jet format, and the chemical solution is sprayed on each surface of the laminated continuous sheet by an ink jet format to respectively apply the chemical solution. Between the chemical solution application step and the slit step, a lamination step is provided between the receiving roll and the roller, and a joining step for forming a line-shaped joining portion that prevents delamination on the lamination continuous sheet is provided,
The chemical solution application step is a step of applying a chemical solution by at least two chemical solution application units that eject the chemical solution in an ink jet format, and one chemical solution application unit is located on the side of the sheet in contact with the roller, and the other chemical solution application The tissue paper manufacturing method according to claim 1, wherein the portion is located on the other sheet side, and the amount of application of one chemical solution application unit is less than the application amount of the other chemical solution application unit. An ink jet head is used in which the chemical liquid is jetted in the chemical liquid application step and is ejected.
This inkjet head
A nozzle plate provided with a plurality of nozzle holes arranged side by side;
A fluid chamber for temporarily storing a chemical for ejection from the nozzle hole;
A diaphragm disposed in a portion facing the nozzle plate across the fluid chamber;
A piezoelectric element disposed in the fluid chamber in contact with the diaphragm;
The tissue paper manufacturing method according to claim 1 or 2, characterized by comprising:

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