JP5882575B2 - Manufacturing method of tissue paper products - Google Patents

Description

  The present invention relates to a method for manufacturing tissue paper products, and in particular, in a multi-stand type interfolder, the secondary continuous sheet is not unwound from a secondary raw roll obtained by winding a secondary continuous sheet coated with a chemical solution. The present invention relates to a method for supplying and manufacturing a tissue paper product to which a chemical solution is applied.

[Tissue paper products]
A bundle of tissue paper is stored in a storage box, and the tissue paper is sequentially pulled out from the outlet provided on one side of the storage box (also called a carton box or tissue carton). Tissue paper products are well known (the type in which when a sheet is taken out, the next sheet is continuously pulled out from the take-out port is also called a pop-up type).

  In this tissue paper product, there are a chemical solution application type in which a tissue paper to be stored is applied with a chemical solution imparting moisture retention and flexibility, and a general-purpose product or general-purpose type in which no chemical solution is applied.

  A tissue paper coated with a chemical is superior to a general-purpose product in terms of surface smoothness and softness.

  Demand for chemical-coated products tended to increase at times when the chances of biting increased, such as when hay fever and influenza are prevalent, but in recent years there have been advantages in terms of usability such as smoothness and softness of the surface. It has been evaluated and used regardless of season and time, and its demand is expanding.

[Types of chemicals used in chemical-coated products]
There are various types of chemicals used in chemical-coated products that have been applied with chemicals that impart moisturizing properties and flexibility, but most of them are aqueous chemicals containing water and polyols (usually “aqueous lotions”, “aqueous lotions”). Are generally classified into oil-based chemicals that mainly contain water-insoluble waxes and are semi-solid at room temperature. Aqueous chemicals are characterized by excellent handling and low cost.

  In addition, when applied to a sheet, an aqueous chemical solution is excellent in affinity with pulp fibers constituting the sheet, impregnated in the sheet thickness direction (also referred to as Z direction), and modifies the entire sheet and its surface properties. Acts as follows. On the other hand, the oil-based chemical liquid mainly acts to coat the surface, and acts to improve the smoothness of the surface.

  And since an aqueous chemical | medical solution impregnates a sheet | seat, the effect | action which extends the crepe of a sheet | seat is large after application | coating, However, such an effect | action is small with an oil-type chemical | medical solution.

  There are differences in problems such as manufacturing problems depending on the characteristics of both.

  An aqueous chemical solution is suitable for low cost and mass production.

[Overview of conventional manufacturing methods for tissue paper products]
The manufacturing process of tissue paper products is as follows.
First, a thin paper (also referred to as crepe paper) having a crepe is made in a paper making facility, and this is wound up to produce a primary roll (generally also called a jumbo roll).

  Next, the required number of primary rolls are set in a ply machine, and a primary continuous sheet is fed out from each of the set primary rolls. 2) is produced.

  Next, the secondary web roll is transferred to a folding facility called an interfolder, secondary continuous sheets are fed out from the secondary web roll sequentially, the secondary continuous sheets are folded and sequentially laminated, and cut into tissue paper. Produce a bundle. Next, this tissue paper bundle is stored in a storage box to obtain a tissue paper product.

[Types of interfolders used to manufacture tissue paper products]
Here, in manufacturing tissue paper bundles used for tissue paper products, two types of multi-stand type (multiple type) interfolders (Patent Documents 1 and 2 below) and rotary interfolders (Patent Documents 3 and 4) are used. Inter folder is used.

  As shown in Patent Documents 1 and 2, the former multi-stand type interfolder has a large number of folding mechanism sections (usually 80 to 120 machines) arranged in the line flow direction. The secondary web roll is fixed to the secondary web roll support section corresponding to the above, and the secondary continuous sheet is unwound from the secondary web roll, and the secondary continuous sheet is supplied to the folding mechanism section. At that time, the multi-stand type interfolder arranges two sets of secondary raw rolls slit to the same width as the width of the tissue paper for each folding mechanism part, and at the same time puts a secondary continuous sheet from the secondary raw roll. The secondary continuous sheet is continuously fed and folded in each folding mechanism, and the folding mechanism on the downstream side of the line is folded on the secondary continuous sheet folded in the folding mechanism on the upstream side of the line. The secondary continuous sheets folded in the above are sequentially laminated, and a continuous laminated sheet bundle in which the required number of sheets is laminated at the most downstream side is formed.

  Here, one machine of the folding mechanism unit is a unit of equipment that folds the secondary continuous sheets so as to be folded inward, and is a unit of the mechanism unit that is the basis of the multi-stand type interfolder.

  Here, since the multi-stand type interfolder has a large number of folding mechanisms, a large number of secondary web rolls are required. And in order to reduce the complexity of the mounting, the secondary roll is often used by winding a plurality of secondary continuous sheets that are slit to the same width as the width of the tissue paper on one tube axis. It is done. Usually, two sets of secondary web rolls wound around one tube shaft are used so that the supply to the folding mechanism can be suitably performed. In addition, the process of slitting to the width of tissue paper is performed immediately before the folding mechanism part of the multi-stand type interfolder, using a secondary raw roll obtained by winding a continuous sheet slit to about 2 to 10 times the width of the tissue paper. Sometimes it is done at

  On the other hand, the rotary type interfolder cuts each secondary continuous sheet fed from a pair of secondary raw rolls while folding them from the leading end side with a rotary folding plate, and from each of the cut secondary raw rolls. The sheets are sequentially stacked to form a laminated sheet bundle.

  In the rotary type interfolder, an original roll having a width of 5 times or more the tissue paper width is used.

  Therefore, this rotary interfolder has an operation for obtaining a laminated sheet bundle by performing appropriate marking and manual division at a predetermined number of laminated sheets in a continuous operation, or automatic division at a predetermined number of laminated sheets. . And the laminated sheet bundle obtained is a comparatively short thing of the length substantially the same as the width length of a secondary original fabric roll. For this reason, it is inferior in productivity as compared with the multi-stand type interfolder.

  For example, in a rotary type interfolder, if a tissue paper bundle is produced at a processing speed of 100 m / min using an original roll having a width 5 times the width of the tissue paper, it takes about 25 bundles / minute. In contrast, the multi-stand type interfolder can produce 435 bundles / minute at a processing speed of 100 m / minute.

[Relationship between tissue paper product type and inter-folder type]
As mentioned above, the multi-stand type interfolder is used for the manufacture of general-purpose type products that require a large amount of production because of its high productivity. The rotary type inter-folder is produced in comparison with the general-purpose type. It is used for the manufacture of a chemical solution coating type with a small amount (for example, Patent Document 5 below).

  Also, in the rotary type interfolder, a wide original roll is used and the operation speed is slow due to the folding mechanism, so that the chemical solution is applied online to the secondary continuous sheet unwound from the secondary original roll. In contrast, it is necessary to set a large number of secondary web rolls in a multi-stand type interfolder, so that chemical solution coating equipment is installed on each of the many secondary web rolls. In addition, it is complicated in terms of quality control, such as adjusting the coating amount of each raw roll, and it is difficult to perform on-line coating, which is a factor that makes different types of tissue paper products manufactured in each interfolder.

  In addition, as for the manufacturing method of the conventional chemical | medical solution application type product, the manufacturing method and equipment are illustrated by the following patent documents 5-7.

  However, considering the increase in production due to the growing demand for chemical-coated tissue paper products as described above, it is desired to manufacture the chemical-coated tissue paper products in a multi-stand type interfolder.

  However, it has been difficult to manufacture chemical tissue-applied tissue paper products using a multi-stand type interfolder due to the following technical problems in addition to the application problems.

[Problems when manufacturing chemical application type products with a multi-stand type interfolder]
When manufacturing chemical solution-coated tissue paper with a multi-stand type interfolder, as described above, online application of chemical solution to the secondary material roll requires complexity, so a secondary continuous sheet pre-applied with chemical solution is used. It is convenient to prepare a wound secondary web roll. Such a secondary material roll is manufactured from a chemical material application facility such as a printer facility other than the multi-stand type interfolder, or a primary material roll which is a pre-stage facility of the multi-stand type interfolder. Manufacture is possible if a ply machine is provided with a printing machine to apply a chemical solution.

  However, in the multi-stand type interfolder, even if a secondary raw roll with a chemical solution applied (hereinafter also simply referred to as a secondary raw roll) is used, the secondary roll roll may be unrolled. It is difficult to increase productivity. This problem will be further described in detail.

  In the multi-stand type interfolder, it is necessary to supply a secondary continuous sheet having a very long tissue paper width to each folding mechanism as described above. In general, the secondary raw roll used is of a small width and a large diameter, and even a roll of continuous sheets having a width multiple of tissue paper width is smaller than that used for a rotary interfolder. Often used. In order to efficiently unwind the secondary continuous sheet from the secondary raw roll having such a small width and large diameter, in the multi-stand type interfolder, the drive belt is brought into contact with the outer peripheral surface of the secondary raw roll, Ideally, the secondary web roll is rotated by a drive belt at a stable speed with small acceleration, and the secondary continuous sheet is unwound from the outer peripheral side, or the secondary continuous roll is pulled from the secondary web roll by a pull roll. The secondary roll is rotated and the secondary continuous sheet is unwound from the secondary roll.

  On the other hand, the secondary continuous sheet constituting the secondary material roll to which the chemical solution is applied is not only the action of the chemical solution itself, but also the crepe is stretched by the chemical solution application, so that the friction resistance of the sheet surface is the secondary of the non-chemical solution application. It tends to be lower than the continuous sheet. In addition, in the multi-stand type interfolder, as described above, the chemical solution is applied by a facility different from the interfolder. Therefore, the chemical solution application secondary raw roll requires a predetermined time from manufacture to use, and the chemical solution between the sheets Since the crepe is elongated by absorbing moisture during the diffusion and permeation time, there is a tendency for the decrease in the frictional resistance of the surface to be increased. Furthermore, when the secondary continuous sheet is stretched due to moisture absorption or the like after the secondary raw roll is formed, the winding of the secondary raw roll itself is loosened. This becomes particularly remarkable in the above-described aqueous chemical solution.

  And when the factor resulting from such chemical | medical solution application | coating and the shape of a small width | variety large diameter are unwound while pulling out a secondary continuous sheet with a secondary roll from a secondary roll, for example, a secondary roll roll Although the outer peripheral side rotates at an appropriate speed according to the pulling of the secondary continuous sheet by the pull roll, the rotational speed may be higher than the outer peripheral surface side on the core side of the secondary raw roll, As a result, a so-called winding deviation occurs in which the winding is shifted between the core side and the outer peripheral surface side. Note that although the principle of occurrence of winding deviation is not clear, it is also presumed to be due to a difference in inertia between the outer peripheral surface of the secondary raw roll and the tube shaft.

  Also, at the start of rotation of the pull roll, that is, at the start of rotation of the secondary web roll at the start of processing, etc., it seems that the inertia moment on the inner circumference side is higher than that on the outer circumference side. Tightening occurs. Further, when the pull roll is temporarily stopped, the inner peripheral side may be over-rotated by the delay of the pull roll due to inertia and the secondary raw roll may be loosened. At the start of the rotation of the secondary web roll, the primary stop operation also causes a winding deviation.

  When the winding deviation occurs in this way, the secondary continuous sheet unwound from the secondary raw roll is supplied to the folding mechanism unit while being shifted left and right and / or back and forth with respect to the traveling direction. As a result, the manufactured tissue paper product is wrinkled or folds poorly, and the pop-up mechanism becomes discontinuous due to the fold failure.

  Here, the winding deviation is noticeably generated in the secondary raw roll having a small width and a large diameter, but may also occur in the secondary raw roll having a relatively wide width.

  In the multi-stand type interfolder, when a relatively wide secondary raw roll is used and a winding shift occurs, there arises a problem that a defect occurs in the slit process performed before the folding mechanism unit.

  In addition, the multi-stand type inner folder is a folding mechanism that forms a laminated continuous sheet bundle together with secondary continuous sheets wound from a number of other secondary raw rolls regardless of the width of the secondary raw roll. Therefore, when a winding deviation occurs in a certain secondary web roll, even if the secondary continuous sheet unwound from the other secondary web roll is normally unwound, a problematic continuous laminated sheet bundle is formed. Will be formed. That is, all of the secondary continuous sheets that are normally unwound from the other secondary raw rolls are wasted.

  Further, in the multi-stand type interfolder, the secondary continuous sheet unwound from the secondary raw roll is wound around an appropriate roll by the folding mechanism unit, and its folding direction is changed and folded by the folding plate. A laminated continuous sheet bundle is formed, and the laminated continuous sheet bundle is conveyed by a pull roll. Therefore, when the conveyance of the secondary continuous sheet shifts from side to side or back and forth due to winding misalignment, when it is wound around the roll and the advancing direction is changed, etc. As a result, a defective laminated continuous sheet bundle is formed.

  In the multi-stand type interfolder, since the continuous laminated sheet bundle is boxed and cut by the final stage cutter, it is difficult to remove only the problematic sheet bundle afterwards.

  As described above, in the multi-stand type interfolder, the winding deviation generated in one of the plurality of secondary raw rolls used becomes obvious as a manufacturing problem.

  In a rotary interfolder, a slight winding deviation may occur even when a wide secondary roll roll pre-impregnated with a chemical solution is used. However, in a rotary interfolder, a pair of secondary rolls Since each secondary continuous sheet unwound from the roll is supplied to the folding mechanism without changing its traveling direction and is alternately folded, there is a shift in the conveyance direction of the secondary continuous sheet due to winding deviation. Even in such a case, the deviation in the conveyance direction is easily corrected, and the deviation in the horizontal direction is corrected by the trim cutting process that is usually provided on the left and right edges, so that it is caused by the winding deviation before being supplied to the folding mechanism. The transport deviation of the secondary continuous sheet is corrected and does not manifest as a manufacturing problem.

  As described above, when manufacturing a tissue-coated paper product of a chemical solution application type in a multi-stand type interfolder, there is a problem of winding of the secondary material roll, which makes it difficult to manufacture.

  In addition, although the technique shown by the following patent documents 8-10 is disclosed regarding winding-up of roll paper, it prevents winding slip at the time of unwinding of the secondary continuous sheet from a secondary original fabric roll. It is not a thing.

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 Japanese Patent Laid-Open No. 63-123743 JP 2009-220991 A JP 2007-106508 A

  Accordingly, the main problem of the present invention is to solve the problem of winding that has occurred in the production of a chemical-coated tissue paper product in a multi-stand type interfolder, and to efficiently manufacture a chemical-coated tissue paper product. Is to provide.

The present invention that has solved the above problems is as follows.
[Invention of Claim 1]
By pulling out the secondary continuous sheet by a pull roll from a secondary raw roll formed by winding a secondary continuous sheet coated with a chemical solution on the tube axis, the secondary raw roll is rotated and the secondary original roll is rotated. A method for producing tissue paper products comprising a step of unwinding a secondary continuous sheet from an anti-roll and supplying the secondary continuous sheet to a folding mechanism part of a multi-stand type interfolder,
The rotation speed of the pull roll is detected, the conveyance speed of the secondary continuous sheet is calculated from the rotation speed of the pull roll, and the peripheral speed of the outer peripheral surface of the secondary raw roll is calculated from the conveyance speed of the secondary continuous sheet. And
The roll diameter of the secondary web roll is detected, and the angular velocity of the outer circumferential surface of the secondary web roll is calculated from the roll diameter and the circumferential velocity of the outer circumferential surface of the secondary web roll,
The rotational speed of the tube shaft of the secondary web roll is adjusted so that the angular velocity of the inner surface of the secondary web roll is synchronized with the angular velocity of the outer surface of the secondary web roll. A method for producing a tissue paper product, wherein the secondary continuous sheet is unwound.

[Invention of Claim 2]
The tissue paper product manufacturing method according to claim 1, wherein the rotation of the tube shaft is adjusted by a servo motor.

[Invention of Claim 3]
A dancer roll is provided between the secondary web roll and the pull roll, and the tension fluctuation of the secondary continuous sheet is detected from the movement of the dancer roll to adjust at least one of the rotation speed of the pull roll and the tube shaft. Item 3. A method for producing a tissue paper product according to Item 1 or 2.

[Invention of Claim 4]
The tissue paper product manufacturing method according to claim 1, wherein the rotation of the tube roll is started simultaneously with the start of the pulling of the secondary roll by starting the rotation of the pull roll.

[Invention of Claim 5]
The method for manufacturing tissue paper products according to claim 1, wherein the rotation of the tube shaft is stopped simultaneously with the stop of the pull roll.

[Invention of Claim 6]
The manufacturing method of the tissue paper product of any one of Claims 1-5 synchronized so that an angular velocity with a pipe axis may become the same as or less than the angular velocity of the outer peripheral surface of a secondary original fabric roll.

(Function and effect)
In the present invention, the secondary raw roll is unwound by pulling the secondary continuous sheet by the pull roll, and the tube shaft is also rotated in conjunction with the rotation of the pull roll. Then, in the rotation of the secondary web roll accompanying the pulling of the secondary continuous sheet by the pull roll, the rotation speed of the pull roll and the rotation speed of the tube shaft are synchronized so that the respective speeds of the outer peripheral surface and the tube shaft are synchronized. Adjust at least one. Therefore, since the secondary web roll has no rotational speed (angular speed) deviation between the outer peripheral surface side and the core side, the occurrence of winding deviation is prevented.

  According to the present invention as described above, it is possible to solve the problem of winding slip that has occurred in the manufacture of a chemical-coated tissue paper product in a multi-stand type interfolder, and to efficiently manufacture a chemical-coated tissue paper product. become.

It is the schematic which shows the manufacturing equipment and manufacturing method of a primary web roll. It is the schematic which shows the manufacturing equipment (ply machine) and manufacturing method of a chemical | medical solution application | coating secondary raw fabric roll. It is the schematic of the multi stand type interfolder concerning this invention. It is the schematic of the original fabric roll support part concerning this invention. 1 is a partial cross-sectional view of a chemical solution-coated secondary raw roll unit according to the present invention. It is a figure for demonstrating the core plug concerning this invention. It is a figure for other explanation of the core plug concerning the present invention. It is a figure for demonstrating unwinding of the secondary continuous sheet of this invention. It is a perspective view for demonstrating a folding mechanism part. It is a perspective view which shows how to fold a secondary continuous sheet. It is a perspective view which shows how to fold a secondary continuous sheet. It is a perspective view which shows how to fold a secondary continuous sheet. It is a bundle sectional view showing how to fold a secondary continuous sheet. It is explanatory drawing of a storage process.

Hereinafter, an example of a manufacturing form of a tissue paper product of a chemical solution application type according to the present invention will be described in detail with reference to the drawings.
[Paper making process [Production method and equipment for primary roll]]
In order to preferably produce the secondary raw roll to which the chemical solution used in the present invention is applied, the primary raw roll JR (also referred to as a jumbo roll) is made as follows according to the papermaking equipment example X1 shown in FIG. To manufacture.

  First, a paper stock prepared by adding an appropriate chemical to the pulp slurry from the head box 31 is supplied onto the wire 32w of the wire part 32 to form the wet paper W (forming process). After being transferred to the felt 34 of the press part 33, it is sandwiched and dehydrated by the paired dewatering rolls 34 and 35 (dewatering step).

  Next, the dehydrated wet paper is attached to the surface of the Yankee dryer 36 and dried, and then scraped off by the doctor blade 37 to obtain a dry base paper S1 (primary continuous sheet described later) having a crepe (drying step).

  The dry base paper S1 is wound by the winding means 38 having the winding drum 39 so that the back surface of the dry base paper S1 faces the axial side of the primary raw roll JR (so that it becomes the winding inner surface). Take the primary roll roll JR (primary roll take-up step).

  The primary web roll JR differs depending on the performance of the papermaking equipment X1, but generally has a diameter of 1000 to 5000 mm, a length (width) of 1500 to 9200 mm, and a winding length of 5000 to 80000 m.

  In addition, a calendar process (not shown) may be provided on the dry base paper S1 that has been scraped off by the doctor blade 37 before the primary web winding process to smooth the front and back surfaces.

  Here, the back surface of the dry base paper S1 means a surface opposite to the surface that is in contact with the cylinder of the Yankee dryer 36. Although depending on the presence or absence of the calendar process, the surface in contact with the mirror Yankee dryer is generally smoother and has better surface properties.

  The primary continuous sheet S1 has a crepe rate of 10 to 30%, preferably 12 to 25%, more preferably 13 to 20%. When the crepe rate is less than 10%, the paper is easy to break during subsequent processing, and the tissue paper does not stretch and has little elongation. 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 it becomes easy to break the paper.

  Moreover, in making the primary continuous sheet S1, the paper strength of the product can be adjusted by a known method so as to have an appropriate value. For example, a dry paper strength enhancer is internally added to the stock or wet paper, the freeness of the stock is reduced (for example, reduced by about 30 to 40 ml), and the NBKP blending ratio of the raw pulp is increased (for example, 50% or more). The known methods such as these can be combined as appropriate.

  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 example of secondary roll with chemicals applied]
The secondary web roll according to the present invention transfers the primary web roll manufactured in the above-mentioned papermaking process to an appropriate chemical solution coating facility, where a chemical solution is applied to form a chemical solution coated primary raw roll, and this chemical solution The primary continuous sheet is unwound from the coated primary roll, and the secondary sheet is wound around several tube shafts as appropriate by slitting multiple widths of tissue paper suitable for multi-stand type interfolders. Can be anti-roll. In addition, since the ease of manufacture and winding deviation become conspicuous in the narrow width original fabric roll, it is desirable that the present invention is a secondary original fabric roll in which a continuous sheet having the same width as the tissue paper is wound.

  Also, without producing the chemical primary roll, the primary continuous sheet is unwound from the primary roll, the chemical is applied to the primary continuous sheet, and slit into a width suitable for a multi-stand type interfolder. A secondary material roll can be obtained by winding it around several tube shafts.

  Furthermore, before winding on a primary web roll in the above-mentioned papermaking process, a chemical solution may be applied, and this may be appropriately slit to form a secondary web roll without going through the primary web roll.

  As described above, the chemical solution-coated secondary raw roll in the present invention is formed by winding a continuous sheet coated with a chemical solution to a width suitable for a multi-stand type interfolder and winding it around one tube shaft. Means things.

  For the application of the chemical solution, known chemical solution application means such as flexographic printing, spray coating, and ink jet printing can be employed. Flexographic printing is suitable because of requirements such as flexibility of printing plates, high-speed compatibility, prevention of chemical solution scattering, and ease of adjustment of coating amount. Furthermore, since the press roll or the like is not brought into contact with the paper surface, the reduction in the paper thickness is not caused. Therefore, the spray coating, which is a non-contact type application form that directly applies the chemical solution to the paper surface without using the press plate roll or the like. Work and ink jet printing are suitable.

  Here, tissue paper products usually have a structure in which a plurality of crepe papers such as 2 plies and 3 plies are laminated to each other, and after the primary continuous sheet is unwound from a plurality of primary raw rolls and laminated. In general, the laminated continuous sheet is wound into a secondary raw roll. And the process of slitting to the width suitable for such laminating processing and multi-stand type interfolder, and the process of winding around the tube shaft with the appropriate number of sheets are generally carried out with equipment called a ply machine. .

  In addition, the ply machine is originally a facility that can move at high speeds and can produce multiple secondary rolls for multi-stand type interfolders at the same time, thus meeting the production speed of highly productive multi-stand type interfolders. It is extremely useful in terms of productivity to produce a secondary liquid roll that can produce a secondary raw roll, and to apply a chemical with a ply machine.

  Therefore, it is particularly preferable in the present invention to produce a secondary raw roll coated with a chemical solution by a ply machine. This production example will be described in detail below.

[Production example of secondary material roll coated with chemicals in ply machine]
In the ply machine X2, as shown in FIG. 2, the required number (two in FIG. 2) of the primary rolls JR produced in the paper making process is set, and the primary continuous rolls fed out from the primary rolls JR and JR. Process for laminating sheets (S11, S12 in the illustrated example), chemical liquid application process for applying chemical liquid, calendar process for calendering, contact embossing process for integrating laminated sheets, tissue paper width suitable for multi-stand type interfolder Or the slit process which slits a sheet | seat in the multiple times that width | variety, and the winding-up process which winds the slit sheet | seat on a pipe shaft by the appropriate sheet number unit are performed continuously. The calendar process and the contact embossing process are not essential.

  The step of laminating the primary continuous sheet is performed by an overlapping portion 51 such as a known nip roll. That is, each primary continuous sheet S11, S12 unwound from each primary raw roll JR, JR is superposed along the continuous direction and then nipped in a laminated state.

  Here, in the illustrated example, the surfaces of the primary continuous sheets S11 and S12 fed out from the primary raw rolls JR and JR are respectively the surfaces of the laminated continuous sheets S3 after being overlaid (here, “surface” of the laminated continuous sheets). Is the front and back surfaces that are the outer surfaces of the stack). You may comprise so that the back surface of primary continuous sheet S11, S12 may become the surface of lamination | stacking continuous sheet S3, respectively, either one back surface of primary continuous sheet S11, S12 may become the surface of lamination | stacking continuous sheet S3, and the other surface May be the surface of the laminated continuous sheet S3, but the surface of the primary raw sheet S11, S12 is in contact with the surface of the Yankee dryer during drying, so there is less fuzz compared to the back surface and it is smooth and soft to the touch Therefore, it is desirable that the surface of the primary continuous sheet (dry base paper S1) forms the front and back surfaces of the laminated continuous sheet S3.

  The chemical solution application step can be performed at an appropriate position of the ply machine X2, but preferably, a chemical solution application means 53 is provided after the overlapping portion 51 to continuously apply the chemical solution to the laminated continuous sheet S3. . This is the form in the illustrated example. As described above, the chemical solution can be applied by using known chemical solution application means such as flexographic printing, spray coating, and ink jet printing. One or a plurality of chemical solution applying means 53 can be installed, and in the case of installing a plurality of chemical solution applying means 53, they may be arranged in parallel in the horizontal direction, the up-down direction, or the oblique direction, and are arranged by combining these installation directions including the horizontal direction You may do it. 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. In the illustrated example, two doctor chamber type flexographic printing machines 53A and 53B are provided in order to apply a chemical solution to both surfaces of the laminated continuous sheet S3.

  The calendering process improves the surface smoothness by known calendering means. In the illustrated example, two calendar means 52, 52 are provided. Note that calendar processing is not necessarily performed.

  The contact embossing step is a step of applying contact embossing so as to make it difficult to separate the plies of the two primary continuous sheets S11 and S12 constituting the laminated continuous sheet S3. The contact embossing means is indicated by reference numeral 54 in FIG.

  The slitting process is a process of slitting the laminated continuous sheet S3 in the continuous direction to make the width of the tissue paper product or multiple times. Slit processing is performed by slit means 55 including a plurality of roll cutters and receiving portions arranged in parallel with a width of tissue paper or multiple times the width in the width direction of the laminated continuous sheet S3 (direction perpendicular to the flow direction). Can be done.

  In the following, an example in which the tissue paper product is slit in the width will be described.

  At the subsequent stage of the chemical solution applying means 53, there is provided a winding means 56 for winding the laminated continuous sheet S3 into the chemical solution applying secondary raw roll 100. The winding means 56 has a pair of winding drums for winding the laminated continuous sheet S3 coated with a chemical solution around the tube shaft while guiding the continuous sheet S3 to the winding means 56. These two winding drums 56A, 56A are in contact with the outer peripheral surface of the chemical solution-coated secondary raw roll R and guide the laminated continuous sheet S3 coated with the chemical solution, and assist the winding of the tube shaft.

  In the manufacturing equipment X2 or the manufacturing method of the secondary web roll 100 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. Due to the relationship with the productivity of the multi-stand type interfolder, if it is less than 100 m / min, it cannot be said that the productivity is sufficient and it is difficult to obtain the effect of the present invention. On the other hand, if it exceeds 1100 m / min, stable production becomes difficult.

[Configuration of secondary roll and secondary continuous sheet]
Here, when this invention is a secondary original fabric roll and a secondary continuous sheet shown below, the remarkable winding-up prevention effect is exhibited.

  The secondary web roll in which the effect of the present invention is remarkable is a roll of secondary continuous sheet of 10,000 to 25000 m, a diameter of 900 to 25000 mm, and a tube shaft diameter of 50 to 300 mm. The width is not limited in the present invention because it depends on the number and width of secondary continuous sheets wound around one tube shaft. The secondary raw roll is particularly effective for a roll of two continuous sheets of tissue paper product width wound around one tube shaft, also referred to as 2-wide. This is because winding slip is likely to occur.

The basis weight of each successive sheet constituting the secondary continuous sheet has a basis weight by JIS P 8124 is, 10 to 25 g / m ^2, preferably 11~20g / m ^2, more preferably 12~16g / m ² It is. The secondary continuous sheet according to the present invention is processed into tissue paper later, and has a basis weight equivalent to that of the tissue paper constituting the final product. When the basis weight is less than 10 g / m ² , it is preferable in terms of the softness of the tissue paper, but it is difficult to ensure an appropriate strength. On the other hand, if the basis weight exceeds 25 g / m ² , the tissue paper becomes too hard and the touch is deteriorated. Further, the paper thickness is measured with a dial thickness gauge (Peacock manufactured by Ozaki Seisakusho), and it is desirable that the paper thickness is 80 to 250 μm, preferably 100 to 200 μm, more preferably 130 to 180 μm.

  The secondary continuous sheet has a dry tensile strength (hereinafter also referred to as dry paper strength) defined in JIS P 8113 having a longitudinal direction of 200 to 700 cN / 25 mm, preferably 250 to 600 cN / 25 mm with 2 plies. 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 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 during use.

The secondary continuous sheet has a chemical coating amount of 0.3 to 5.0 g / m ² , preferably 1.0 to 4.0 g / m ² . Note that if it exceeds 3.9 g / m ² , there may be a case where the paper is cut or the sticky feeling is too high due to a decrease in paper strength or elongation. If it is less than 0.3 g / m ² , the quality difference from the uncoated product such as smoothness and moistness cannot be felt. Moreover, when it is in this range, the effect of preventing winding deviation becomes remarkable.

  In the secondary continuous sheet, the applied chemical solution is an aqueous chemical solution, particularly containing a polyol, more preferably containing 70 to 90% polyol and 1 to 15% moisture, particularly preferably further functioning. It contains 0.01 to 22% of chemicals. Such an aqueous chemical solution has an action of extending the crepe, and the effect of the present invention becomes remarkable.

  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. . In particular, glycerin is desirable in terms of effect and handling.

  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 or more of a hydrophilic polymer gelling agent, collagen, hydrolyzed collagen, hydrolyzed keratin, hydrolyzed silk, hyaluronic acid or a salt thereof, ceramide, etc. are optionally selected as agents that maintain the moisture retention of polyol. A moisturizer such as a combination of the above 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.

  Among the above components, when the main component is a polyhydric alcohol such as glycerin or propylene glycol, it is preferable from the viewpoint of application in terms of stabilizing the viscosity and application amount of the chemical solution.

  On the other hand, the secondary continuous sheet has pulp paper as a main material. The pulp fiber type is not particularly limited, and an appropriate raw material pulp used for this type of tissue paper can be selected and used. Specific examples include wood pulp, non-wood pulp, synthetic pulp, waste paper pulp, and more specifically, ground wood pulp (GP), stone ground pulp (SGP), refiner ground pulp (RGP), pressurized ground wood pulp. (PGW), thermomechanical pulp (TMP), chemithermomechanical pulp (CTMP), bleached chemithermomechanical pulp (BCTMP) and other mechanical pulp (MP), chemical mechanical pulp (CGP), semi-chemical pulp (SCP) Kraft pulp (KP) such as hardwood bleached kraft pulp (LBKP), softwood bleached kraft pulp (NBKP), chemical pulp (CP) such as soda pulp (AP), sulfite pulp (SP), dissolved pulp (DP) , Nylon, rayon, polyester, polyvinyl alcohol (PVA) Synthetic pulp made from coconut, deinked pulp (DIP), waste paper pulp such as waist pulp (WP), ground pulp (TP), cotton, flax, hemp, jute, manila hemp, ramie etc. One or several kinds of pulp, esparto pulp, bagasse pulp, bamboo pulp, sesame pulp such as kenaf pulp, auxiliary pulp such as bast pulp, and the like can be appropriately selected and used.

  In particular, the pulp fiber is preferably composed of NBKP and LBKP. Used paper pulp may be blended as appropriate, but it is compatible with aqueous chemicals, desirable in the production method of the present invention that is folded after application, and desirable in terms of the texture of the resulting tissue paper. It is preferable that it is composed only of LBKP. In this case, the blending ratio (JIS P 8120) is preferably NBKP: LBKP = 20: 80 to 80:20, and particularly preferably NBKP: LBKP = 30: 70 to 60:40.

[Attaching the secondary roll to the multi-stand type interfolder]
As shown in FIGS. 3 to 8 and the like, the secondary fabric roll 100 to which the chemical solution manufactured by the above manufacturing example is applied flows through the folding mechanism unit 70 having a pair of folding plates 72 and 72. The multi-stand type interfolder X3 having a structure in which a large number (usually 80 to 120) are arranged in the direction is moved, and is rotatably attached to the original fabric roll support portion 71 corresponding to each folding mechanism portion.

  The raw fabric roll support portion 71 in the illustrated example is an upwardly open concave groove 81 formed in the support base 80 as shown in FIG. 4 and the like, and the secondary raw fabric roll is a secondary called a core plug 150. This is a form in which the roll roll 100 is rotatably attached via a rotation support unit integrated with the tube shaft 110 of the original roll 100.

  As is understood from FIGS. 4 to 6 and FIG. 10 in particular, the core plug 150 has one end inserted into the tube shaft 110 from the end surface 101 of the secondary web roll 100 to connect with the tube shaft 110. The other end of the connecting portion 151 protrudes outward from the end surface 101 of the secondary raw roll 100, and the secondary original roll 100 is rotatably supported with respect to the original roll support 71. And a flange portion 150 </ b> F between the connecting portion 151 and the support portion 152.

  The core plug 150 is attached to the secondary web roll 100 by installing the core plug 150 on each end face 101 side of the secondary web roll 100 and connecting it through the shaft member 153 inserted into the tube shaft 110. Each core plug 150 is fixed with respect to the tube shaft 110 so as to be close to each other. More specifically, as shown in FIGS. 6 and 7 in particular, a shaft member 153 having a through hole 154 formed at the center of the core plug 150 and having screw portions 153N at both ends is passed through the through hole 154, and the nut member 155 is formed. Are screwed into the threaded portion and tightened so that the core plugs are connected and brought close to each other, and the core plugs 150 and 150 are fixed to the tube shaft 110. At this time, the flange 150F is pressed against the end surface 101E of the tube shaft end surface 110E and further to the end surface 101 of the secondary raw roll 100, so that integration with a single secondary raw roll is achieved. In addition, the connection part of the core plug 150 may be press-fitted into the tube shaft, or may be inserted.

  In the present invention, it is desirable that the core plug 150 and the tube shaft 110 have a high unity. From this point of view, the core plug 150 and the tube shaft 110 are fixed by engaging the tube shaft 110 and the core plug 150. desirable. For fixing, for example, a fixing concave portion is provided on the end surface 110E or the inner peripheral surface of the tube shaft 110, and a fixing convex portion that fits into the fixing concave portion is provided on the flange 150F or the connecting portion 151 of the core plug 150. . Examples of the fixing means include a fixing convex portion that fits into the fixing concave portion when the core plug 150 is connected and attached.

  In the example of the core plug 150, the shaft member 153 is a separate member from each core plug 150. For example, as shown in FIG. 7, the shaft member 153 may be integrated with one core plug.

[Unwinding process in multi-stand type interfolder]
Next, with reference to FIG. 8 in particular, with regard to unwinding of the secondary continuous sheet from the secondary raw roll attached to the raw roll support portion 71, the secondary continuous sheet having the tissue paper product width is fed into one tube shaft. An example of a so-called two-wide secondary roll roll wound on the sheet will be described.

  After the secondary raw roll 100 is attached to the raw roll support part 71, the secondary continuous sheets S4a and S4b are unwound from the secondary raw roll 100. The secondary continuous sheets S4a and S4b are unwound from the secondary raw roll 100 so that the secondary continuous sheets S4a and S4b are nipped and pulled out by a pull roll 83 installed close to the secondary raw roll. To do. The basic configuration of the pull roll can be a known configuration. For example, it has a pair of nip rolls 83A and 83B having a non-slip effect by making the peripheral surface made of rubber, and one or both of the nip rolls 83A and 83B are connected to a driving device such as a motor (not shown). It is comprised so that it may rotate with this drive device. The secondary continuous sheet is nipped by the pair of nip rolls 83A and 83B, and the secondary continuous sheet is fed by rotating each nip roll by the driving device in this state.

  In this embodiment, the pull rolls are arranged so that the nip rolls 83A and 83B are in contact with both of the plurality of secondary continuous sheets S4a and S4b wound around the tube shaft 110. The continuous sheets S4a and S4b are effectively unwound.

  The rotation speed of the nip roll 83 is a speed corresponding to the conveying speed of the continuous sheet bundle 10C in the subsequent stage of each folding mechanism section 70, 70. The conveying speed of the continuous sheet bundle 10C is 50 to 120 m / min.

  Here, in the present invention, the tube shaft is rotated by a driving device or the like, and this is synchronized with the rotation of the pull roll, so that the angular velocity of the outer peripheral surface 100A of the secondary raw roll 100 and the tube shaft 110 is the same or slightly tube shaft. The secondary continuous sheets S4a and S4b are unwound while being adjusted so that the angular velocity of the sheet becomes slower. If it does in this way, since the winding core side of a secondary original fabric roll will be forcedly rotated by the pipe shaft 110, generation | occurrence | production of winding deviation is prevented effectively. In particular, when the angular velocities are the same, the degree of winding tightening is always constant, so that winding deviation hardly occurs. It is most desirable to always adjust so that they are the same. However, even if the angular velocity of the tube shaft is slightly lower than the angular velocity of the outer peripheral surface 100A of the secondary raw roll 100, a load that causes the winding to be tightened moderately is provided as long as it does not tighten more than necessary. The applied state is maintained, and the effect of suppressing the occurrence of winding deviation is exhibited. In this case, the degree to which the angular velocity is delayed may be appropriately designed in relation to the diameter of the tube axis. Of course, when the rotation of the tube axis is too slow, there is a high possibility that a paper break or winding deviation due to unnecessary tightening will occur, and therefore, excessive delay of the angular velocity of the tube axis is not preferable.

  Since the secondary continuous sheets S4a and S4b are in contact with the outer surface of the tube shaft with a certain amount of pressure due to their own weight and the like, the displacement between the tube shaft 110 and the secondary continuous sheet hardly occurs. Also, the deviation here is not an operational problem. The winding deviation referred to in the present application is a deviation generated at a portion where the secondary continuous sheet is wound.

  In the present invention, the tube shaft is rotated by a drive device or the like, and this is synchronized with the rotation of the pull roll, so that the angular velocity of the outer peripheral surface 100A of the secondary raw roll 100 and the tube shaft 110 is the same or slightly different. As a specific method for adjusting to a slow state, the following can be exemplified.

  First, the rotation speed of the pull roll is detected by the speed detection device for the peripheral speed, the angular speed, and the rotation measure, and the conveyance speed of the secondary continuous sheet is calculated from the rotation speed. The peripheral speed of the pull roll can be calculated from the angular speed, the rotational speed, and the diameter of the pull roll. The rotation speed of the pull roll can be detected by calculating based on a known rotation measurement meter such as a pulse encoder and a detection value / calculation value of the rotation speed of the motor serving as a drive source. The conveyance speed of the secondary continuous sheet can be calculated from the peripheral speed of the pull roll.

  Next, the transport speed of the secondary continuous sheet is calculated from the peripheral speed of the pull roll, the peripheral speed of the secondary web roll is calculated from the transport speed of the secondary continuous sheet, and the angular speed is calculated from the peripheral speed.

  Here, since the secondary continuous sheet S4a and S4b are unwound from the outer peripheral side, the diameter of the secondary web roll 100 changes over time. For this reason, in calculating the angular velocity of the secondary web roll 100, a change in the diameter of the secondary web roll 100 is measured and reflected in the calculation. The measurement of the diameter of the secondary roll 100 can be performed continuously and step by step, but the diameter of the secondary roll 100 can be adjusted so that the rotation speed of the tube shaft 110 described later can be adjusted in detail and continuously. It is preferable that the measurement is performed continuously over time, and the calculated value is calculated continuously.

  The diameter of the secondary web roll 100 is detected by measuring the radius and diameter from the end surface 101 of the secondary web roll 100, measuring the change in the position of the outer peripheral surface, and starting the unwinding of the secondary web roll. Examples include a method of calculating from the previous diameter, the thickness of the secondary continuous sheets S4a and S4b, and the actually unwound length. From the viewpoint of ease of measurement and accuracy, it is desirable to use a displacement measuring device that uses laser light L as shown in the illustrated example. That is, the displacement of the outer surface of the secondary web roll is measured by irradiating the outer circumferential surface 100A of the secondary web roll 100 with the laser light L from the laser irradiation device 182 and detecting the reflected light. It is desirable to calculate the diameter of the secondary web roll 100 over time from the measured value and the initial diameter of the secondary web roll. When a plurality of secondary continuous sheets S4a and S4b are wound around one tube shaft 110, the diameters of the portions where the secondary continuous sheets S4a and S4b are wound may be different. Usually, since the sheet thickness of the secondary continuous sheets S4a and S4b is extremely thin, this difference can be ignored. However, each diameter is measured, and the average value may be used as the diameter of the secondary raw roll 100.

  Next, the rotation speed of the tube shaft 110 is adjusted according to the rotation speed such as the angular speed of the secondary web roll 100. The tube shaft 110 is rotated because the tube shaft 110 and the core plug 150 are connected to each other, so that the support portion 152 of the core plug 150 is connected to a shaft drive device or a belt drive device 181 via a timing belt 180 as shown in the figure, a chain. What is necessary is just to make it drive rotationally by a drive device so that torque control is possible.

  In order to synchronize the rotation of the pull roll and the tube shaft and adjust the angular velocity of the secondary web roll 100 and the angular velocity of the tube shaft 110, either automatic adjustment or manual adjustment may be used. Automatic adjustment is desirable because it is difficult to foresee. As an example of manual adjustment, for example, the angular speed or rotational speed of the secondary raw roll 100 calculated based on the rotational speed of the pull roll and the angular speed or rotational speed of the tube shaft 110 are displayed on a monitor, and these are displayed. For example, an operation of manually changing the torque of the drive device that rotationally drives the support shaft 152 of the core plug 150 can be exemplified.

  As a preferred example of automatic adjustment, the belt driving device 181 of the support portion 152 of the core plug 150 is driven by a servo motor 181S as shown in the drawing, and is linked to the speed of the pull roll 83. Interlocking is performed by transmitting the speed signal D1 of the pull roll 83 detected by the speed detection apparatus of the pull roll and the detection signal D2 of the diameter of the secondary raw roll 100 to the calculation / control apparatus 200, and the calculation / control apparatus 200 uses the signals. Based on this, an appropriate calculation process is performed to calculate the angular velocity or rotational speed of the secondary web roll 100. At the same time, the angular velocity and rotational speed of the support portion 152 are transmitted to the arithmetic / control device 200 as the signal D3 via the servo motor 181S or a separate detection device. Note that the angular velocity of the support portion 152 of the core plug 150 and the angular velocity of the tube shaft 110 are the same due to the connection between the core plug 150 and the tube shaft 110. Then, the arithmetic / control device 200 compares the angular velocity or the like of the secondary material roll 100 with the angular velocity or the like of the support portion 152, and if it does not match, the arithmetic / control device 200 makes the servo match. A signal D4 for increasing / decreasing torque is transmitted to the motor 181S so as to match the angular speed of the secondary web roll 100, and the drive of the servo motor 181S is adjusted to match the angular speed of the secondary web roll 100 and the tube shaft 110. Let Thus, the rotation of the pull roll 83 and the rotation of the tube shaft 110 are synchronized, and the angular velocity of the secondary raw roll 100 and the angular velocity of the tube shaft 110 are automatically adjusted.

  The arithmetic / control device 200 can be achieved by a servo system or a control system using a known general-purpose computer or a dedicated computer. In the present invention, the program is not limited. It should be noted that it is an appropriate design matter to adjust when the difference in angular velocity between the secondary raw roll 100 and the tube shaft 110 (support portion 152) becomes.

  Here, it is desirable that the secondary continuous sheets S4a and S4b unwound from the secondary roll 100 are supplied to the folding mechanism unit 70 at a constant speed and a constant tension. Thus, in the present invention, a dancer roll 185 that moves up and down is preferably provided between the secondary raw roll 100 and the pull roll 83. This dancer roll 185 can absorb the tension fluctuation of the secondary continuous sheets S4a and S4b. Here, the dancer roll 185 moves up and down to absorb the tension fluctuation of the secondary continuous sheets S4a and S4b as shown in the figure. It is in a state where the speed of at least the outer peripheral surface side of the secondary raw roll is higher than the processing speed by the mechanism units 70, 70..., And conversely, the dancer roll 185 moves upward. It can be said that the speed of at least the outer peripheral surface side of the secondary raw roll is higher than the processing speed by the folding mechanism portions 70, 70. Therefore, it is desirable to adjust the rotation speed of the pull roll in accordance with the tension variation of the secondary continuous sheets S4a and S4b on the dancer roll 185. The tension fluctuation of the secondary continuous sheets S4a and S4b in the dancer roll 185 can be detected from the vertical movement amount of the dancer roll 185.

  When adjusting the angular velocity between the secondary web roll 100 and the tube shaft 110 according to the rotation speed of the pull roll 83, the tension fluctuation detection signal D5 is further transmitted to the calculation / control apparatus 200. Thus, it is desirable that the pull roll 83 be adjusted in rotation speed and the rotation speed of the tube shaft 110 be adjusted. In addition, the adjustment signal to the pull roll 83 is represented by the code | symbol D6 in the figure.

  It is to be noted that the rotation of the tube shaft 110 is stopped when the pull roll 83 is stopped so that the rotation of the tube shaft 110 is stopped when the pull roll 83 is stopped. If the drive source 181S is interlocked, it is possible to prevent winding slippage when the secondary roll 100 is started to rotate or when the rotation is stopped. This interlocking can also be interlocked with other adjustments by the arithmetic / control device 200. Of course, it may be different or performed manually.

  In addition, even when a plurality of secondary continuous sheets are wound around one tube shaft 110, the winding portion of each secondary continuous sheet is independently wound by rotating the common tube shaft 110. Occurrence almost disappears, and the effect of preventing winding is sufficiently exhibited.

[Folding process in multi-stand type inter folder]
Next, folding of the secondary continuous sheets S4a and S4b unwound from the secondary raw roll 100 will be described. The secondary continuous sheets S4a and S4b having two tissue paper widths unwound from the secondary raw roll 100 are supplied to the folding mechanism unit 70 and folded. Folding at the folding mechanism is understood in particular from FIGS. 3, 4, and 9 to 14. The folding mechanism unit 70 includes a pair of folding plates 72, and secondary continuous sheets S <b> 4 a and S <b> 4 b are sent to the folding plates 72 and 72 via the guide roller 74 and the guide round bar member 75. Below each folding plate 72, 72 is located a continuous tissue paper bundle 10C that is stacked while being folded by a folding mechanism portion 70 on the upstream side of the folding plate 72, and the folding tissue portion 10C is placed on the continuous tissue paper bundle 10C. The chemical solution application secondary continuous sheets S4a and S4b folded at 70 are associated and stacked. These continuous tissue paper bundles 10C are configured to be sequentially sent downstream by a conveyor. That is, the number of continuous tissue paper bundles 10C is increased as the folding mechanism unit 70 located upstream is moved to the folding mechanism unit 70 located downstream. In addition, the folding mechanism part 70 using this kind of folding plate 72,72 ... is a mechanism well-known by US Patent 4052048 patent specification etc., for example.

  Further, the folding in the folding mechanism unit 70 will be described in detail. The secondary continuous sheets S4a and S4b supplied to the folding mechanism unit 70 are folded in a Z shape and are adjacent to the adjacent secondary continuous sheets S4a and S4b. Stack the side edges together. At this time, in the folding mechanism portion 70, the secondary continuous sheets S4a and S4b are guided to the respective folding plates 72 and 72. At this time, the secondary continuous sheets S4a and S4b are guided round bar members 75 and 75, respectively. Therefore, the side end portions are guided while being shifted in position so as not to overlap each other.

  A continuous secondary continuous sheet that overlaps the lower side when guided to the folding plates 72, 72 is a first secondary continuous sheet S4a, and a secondary continuous sheet that overlaps the upper side is a second secondary continuous sheet. Assuming that the sheet S4b, these secondary continuous sheets have a side end e1 that does not overlap the second secondary continuous sheet S4b of the first secondary continuous sheet S4a by the side plate 72e of the folding plate 72, and the second secondary continuous sheet S4b. A side end e2 of the second secondary continuous sheet S4b that does not overlap with the first secondary continuous sheet S4a is folded from the slit 72s of the folding plate 72 below the folded plate while being folded back to the upper side of the secondary continuous sheet S4b. It is folded back as if it was pulled in.

  At this time, the side end e3 (e1) of the secondary continuous sheet S4a stacked while being folded on the upstream folding plate is guided between the folded portions of the second secondary continuous sheet from the slit of the folding plate.

  In this way, each secondary continuous sheet is folded into a Z-shape and the side ends of adjacent secondary continuous sheets are overlapped with each other.

  As described above, the chemical-containing continuous tissue paper bundle 10C formed by being folded and folded by the respective folding plate mechanism portions 70, 70... Is a rear stage cutter of the most downstream folding plate mechanism portion 70 as shown in FIG. In the section 160, the tissue paper bundle 10 is cut (cut) at a predetermined interval in the flow direction. Here, the processing speed in the cutter unit 160 is 50 to 120 m / min, and in the present invention, the secondary continuous sheet from the secondary original roll 100 set on the original roll support 71 by the processing speed of the cutter concerned. The feeding speed of S4a and S4b is determined. And this speed is slow compared with the above-mentioned papermaking equipment X1 and ply machine X2. And even if it is late, it exhibits sufficiently high productivity.

  This is because the multi-stand type interfolder X3 usually has 80 to 120 folding mechanisms, and the total width of the secondary roll used here is made by the paper making equipment X1 or the ply machine X2. -It is because it becomes about 10 to 30 times the processed secondary raw roll. That is, in the multi-stand type interfolder X3, the consumption speed of the secondary material roll is high even if the processing speed is low.

[Storing tissue paper bundles in storage boxes]
Next, an example of storing the tissue paper bundle 10 formed in the multi-stand type interfolder X3 in the storage box 2 will be described. The method for storing the tissue paper bundle 10 in the storage box is not limited to this example, and a known method can be adopted.

  The tissue paper bundle 10 cut and formed by the cutting step is stored in the storage box 2 as shown in FIGS. 13 and 14 in a storage facility that follows the multi-stand type interfolder X3.

  Specifically, a storage box having the above-described top surface, bottom surface and side surfaces connecting these, and bottom surface side end surface pieces 23B, side surface end surface pieces 23S, and top surface side end surface pieces 23U connected to both side edges in the longitudinal direction of each surface. Is assembled in a semi-finished state in which the bottom end piece 23B, the side end piece 23S, and the top end piece 23U are open, that is, the end face is opened, and is multi-stand type so as to face the opening. The cut surface of the tissue paper bundle 10 sent from the interfolder X3 is attached.

  And if it attaches together, the tissue paper bundle 10 will be pushed in in a storage box by a push rod etc. When the tissue paper bundle 10 is pushed into the storage box, the side surface end piece 23S is folded back to the inner surface side of the box, and then the upper surface side end surface piece 23U and the bottom surface side end surface piece 23B are folded to overlap each other. The contact portion is bonded with a hot melt adhesive or the like.

  This bonding completes the production of the tissue paper product of the present invention.

  In the multi-stand type interfolder X3, the continuous tissue paper bundle 10C has a flow direction in the vertical direction (MD direction) and a horizontal direction (CD direction) along a direction orthogonal to the flow direction. For this reason, the direction of the paper of the tissue paper constituting the tissue paper bundle 10 obtained by cutting the continuous tissue paper bundle 10C into a predetermined length is along the extending direction of the folded portion of the tissue paper as shown in the drawing. The vertical direction (MD direction) and the horizontal direction (CD direction) along the direction perpendicular to the extending direction of the folded portion of the tissue paper.

  Therefore, when the tissue paper product manufactured by the present invention stored in the storage box as described above is pulled out from the storage box, the pull-out direction is along the lateral direction (CD direction) of the tissue paper. It has become.

  X1 ... papermaking equipment, JR ... primary web roll (jumbo roll), W ... wet paper, S1 ... dry base paper (primary continuous sheet), 31 ... head box, 32 ... wire part, 32w ... wire, 333 ... press part, 33F ... felt, 34, 35 ... dewatering roll, 36 ... Yankee dryer, 36C ... Yankee dryer hood, 37 ... doctor blade, 38 ... winding means, 39 ... winding drum, X2 ... ply machine, S11, S12 ... primary continuous sheet , S3 ... laminated continuous sheet, 51 ... overlapped portion, 53 ... chemical solution applying means, 54 ... contact embossing means, 55 ... slitting means, 56 ... winding means, 100 ... secondary raw roll, 100A ... outer peripheral surface, 101 ... End surface of secondary web roll, 110 ... Tube axis, 110D ... Dummy pipe axis, 110E ... Tube axis End, 150 ... Core plug, 150F ... Flange, 151 ... Connecting part, 152 ... Supporting part, 153 ... Shaft member, 153N ... Screw part, 154 ... Through hole, 155 ... Nut member, X3 ... Multi-stand type interfolder, S4a, S4b ... secondary continuous sheet, 70 ... folding mechanism, 71 ... raw roll support, 72 ... folded plate, 73,74 ... guide roller, 75 ... guide round bar member, 10C ... continuous tissue paper bundle, 80 ... support Pedestal, 81 ... concave groove, 83 ... driving belt, 180 ... timing belt, 181 ... belt driving device, 181S ... servo motor, 182 ... displacement measuring device, 185 ... dancer roll, 200 ... arithmetic / control device, D1-D6 ... Calculated value signal, adjustment signal.

Claims (6)

By pulling out the secondary continuous sheet by a pull roll from a secondary raw roll formed by winding a secondary continuous sheet coated with a chemical solution on the tube axis, the secondary raw roll is rotated and the secondary original roll is rotated. A method for producing tissue paper products comprising a step of unwinding a secondary continuous sheet from an anti-roll and supplying the secondary continuous sheet to a folding mechanism part of a multi-stand type interfolder,
The rotation speed of the pull roll is detected, the conveyance speed of the secondary continuous sheet is calculated from the rotation speed of the pull roll, and the peripheral speed of the outer peripheral surface of the secondary raw roll is calculated from the conveyance speed of the secondary continuous sheet. And
The roll diameter of the secondary web roll is detected, and the angular velocity of the outer circumferential surface of the secondary web roll is calculated from the roll diameter and the circumferential velocity of the outer circumferential surface of the secondary web roll,
The rotational speed of the tube shaft of the secondary web roll is adjusted so that the angular velocity of the inner surface of the secondary web roll is synchronized with the angular velocity of the outer surface of the secondary web roll. A method for producing a tissue paper product, wherein the secondary continuous sheet is unwound.   The tissue paper product manufacturing method according to claim 1, wherein the rotation of the tube shaft is adjusted by a servo motor.   A dancer roll is provided between the secondary web roll and the pull roll, and the tension fluctuation of the secondary continuous sheet is detected from the movement of the dancer roll to adjust at least one of the rotation speed of the pull roll and the tube shaft. Item 3. A method for producing a tissue paper product according to Item 1 or 2.   The tissue paper product manufacturing method according to claim 1, wherein the rotation of the tube roll is started simultaneously with the start of the pulling of the secondary roll by starting the rotation of the pull roll.   The method for manufacturing tissue paper products according to claim 1, wherein the rotation of the tube shaft is stopped simultaneously with the stop of the pull roll.   The manufacturing method of the tissue paper product of any one of Claims 1-5 synchronized so that an angular velocity with a pipe axis may become the same as or less than the angular velocity of the outer peripheral surface of a secondary original fabric roll.

Images