JP2014168693A - Method for manufacturing wet tissue laminate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a wet tissue laminate suppressed in unnecessary jumping-out of wet tissue.SOLUTION: A method for manufacturing a wet tissue laminate includes: a liquid medicine applying step of applying a liquid medicine 20 to a tissue base material 10a; and a laminate forming step of forming a base material laminate 10 where the plurality of sheets of tissue base material 10a are continuously laminated. In the laminate forming step, the tissue base material 10a is folded so that an overlapping part L of an end of the one tissue base material 10a, and the other end of the tissue base material 10a put between a turned part of the one tissue base material 10a forms a line along the lamination direction of the tissue base material 10a. In the liquid medicine applying step, the liquid medicine 20 is applied so that an impregnation rate of the liquid medicine 20 in a first area 11 extending from one side to the other side in the lamination direction of the tissue base material 10a, arranged with the overlapping part L is lower than an impregnation rate of the liquid medicine 20 in areas excluding the first area 11 of the base material laminate 10.

Description

  The present invention relates to a method for producing a wet tissue laminate.

  Conventionally, a wet tissue in which a tissue base material such as a nonwoven fabric is impregnated with a chemical is known. For example, a wet tissue can be folded in a state where one wet tissue is folded and another wet tissue is sandwiched between the folded portions, so that a plurality of wet tissues are continuously stacked, and a container, etc. It is stored in. When the uppermost wet tissue is taken out by folding the wet tissue in a pop-up manner in this way, part of the wet tissue in the next layer that has been sandwiched between the two will protrude from the outlet of the container, etc. Can be easily taken out.

By the way, when the wet tissue is folded by the pop-up method, the protruding length of the next layer of wet tissue (the length of the part protruding from the outlet) becomes longer than necessary, or multiple wet tissues are pulled out together. The problem that the wet tissue pops out unnecessarily.
Therefore, as a method of folding wet tissue, a folding method that can suppress unnecessary jumping out of wet tissue has been proposed (see Patent Documents 1 and 2).

JP 2011-062443 A JP 2012-120638 A

  However, the problem that the wet tissue pops out unnecessarily when folded by the pop-up method is also related to the viscosity of the chemical solution impregnated in the tissue base material and the impregnation rate of the chemical solution. Therefore, it is not possible to sufficiently suppress unnecessary jump out of the wet tissue only by devising the folding method.

  An object of the present invention is to provide a method for manufacturing a wet tissue laminate, which is a wet tissue laminate formed by folding a wet tissue in a pop-up manner, in which unnecessary protrusion of the wet tissue is sufficiently suppressed. It is.

In order to solve the above-mentioned problem, the invention described in claim 1
A chemical application step for applying a chemical to the tissue substrate;
A plurality of sheets are obtained by folding one tissue base material coated with the chemical solution and folding the other tissue base material with an end of the other tissue base material coated with the chemical solution sandwiched between the folded portions. A laminate forming step of forming a wet tissue laminate in which the wet tissues are continuously laminated, and
In the laminated body forming step, an overlapping portion between an end portion of one tissue base material and an end portion of another tissue base material sandwiched between folded portions of the one tissue base material is an area of the tissue base material. Folding and stacking the tissue base material coated with the chemical solution so as to line up in the stacking direction,
In the chemical solution application step, the impregnation rate of the chemical solution in the first region extending from one side to the other side in the stacking direction of the tissue base material on which the overlapping portion is disposed is other than the first region of the wet tissue laminate. The chemical solution is applied to the tissue base so as to be lower than the impregnation rate of the chemical solution in a certain second region.

The invention described in claim 2
In the manufacturing method of the wet tissue laminated body of Claim 1,
In the chemical solution application step,
A pattern roll having irregularities of a predetermined pattern on the outer peripheral surface;
A press roll having an outer peripheral surface that is in contact with the outer peripheral surface of the pattern roll and pressed against the irregularities of the outer peripheral surface of the pattern roll;
A transfer roll having an outer peripheral surface in contact with the outer peripheral surface of the pattern roll;
Applying the chemical using the chemical supply means for supplying the chemical to the outer peripheral surface of the transfer roll,
The pattern roll has pattern irregularities such that the amount of the chemical solution applied per unit area in the first region is smaller than the amount of the chemical solution applied per unit area in the second region. To do.

  According to the present invention, the impregnation rate of the chemical solution in the first region extending from one side to the other side in the stacking direction of the tissue base material on which the overlapping portion is disposed is the impregnation rate of the chemical solution in the second region other than the first region. It is possible to weaken the sticking of overlapping parts without setting restrictions on the viscosity of chemicals and the impregnation rate of chemicals, or by devising how to fold wet tissue (tissue base material). It is possible to provide a wet tissue laminate in which unnecessary protrusion of tissue is sufficiently suppressed.

It is a figure which shows the wet tissue laminated body which concerns on embodiment of this invention typically, Comprising: (a) is a perspective view, (b) is a side view. It is a figure which shows the state which accommodated the wet tissue laminated body in the container, Comprising: (a) is sectional drawing, (b) shows the relationship between a wet tissue and a container when drawing out wet tissue from a container. FIG. FIG. 3 is a diagram schematically showing a state in which a wet tissue laminate having a different overlap position from the position shown in FIG. 2 is housed in a container, where (a) is a cross-sectional view and (b) is a drawing of the wet tissue from the container. It is a figure which shows the relationship between the time wet tissue and a container. It is a figure for demonstrating an example of the chemical | medical solution application nozzle used at the time of manufacture of a wet tissue laminated body. It is a figure for demonstrating another example of the chemical | medical solution application nozzle used at the time of manufacture of a wet tissue laminated body. It is a figure for demonstrating another example of the chemical | medical solution application nozzle used at the time of manufacture of a wet tissue laminated body. (A) is a figure for demonstrating how to fold the wet tissue laminated body in an Example, (b) is a figure which shows the evaluation result. It is a figure for demonstrating the manufacturing method of the wet tissue laminated body of the modification 1, Comprising: It is a figure which shows an example of the roll transfer apparatus used at the time of manufacture of a wet tissue laminated body. It is a figure which shows typically an example of the tissue base material which apply | coated the chemical | medical solution with the roll transfer apparatus shown in FIG. 8, Comprising: (a) is a top view, (b) is a side view. It is a figure which shows typically another example of the tissue base material which apply | coated the chemical | medical solution with the roll transcription | transfer apparatus shown in FIG. 8, Comprising: (a) is a top view, (b) is a side view. It is a figure which shows typically another example of the tissue base material which apply | coated the chemical | medical solution with the roll transcription | transfer apparatus shown in FIG. 8, Comprising: (a) is a top view, (b) is a side view.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

<Configuration of wet tissue laminate>
First, the configuration of the wet tissue laminate of this embodiment will be described.
For example, as shown in FIG. 1, the wet tissue laminate 1 is formed by folding one tissue base material 10a and sandwiching the end portion of the other tissue base material 10a in the folded portion. Is formed of a base material laminate 10 in which a plurality of tissue base materials 10a are continuously laminated, and a chemical solution 20 impregnated in the tissue base material 10a.
That is, the wet tissue laminate 1 is a laminate in which a wet tissue 1a composed of a tissue base material 10a and a chemical solution 20 impregnated in the tissue base material 10a is folded in a pop-up manner. Hereinafter, the stacking direction of the wet tissue 1a (tissue base material 10a) is referred to as “vertical direction”.
For example, as shown in FIGS. 2 and 3, the wet tissue laminate 1 is used in a state of being housed in a container M having an outlet M1 on the upper surface.

The tissue base material 10a is a non-woven fabric for wet tissue manufactured by a known technique such as spunbond, melt blow, air laid, spun lace, thermal bond, chemical bond, needle punch, etc., using a predetermined fiber as a fiber material. is there.
The tissue base material 10a is not particularly limited as long as it is made of a fiber assembly. For example, paper or woven fabric can be used in addition to the nonwoven fabric.

The fibers constituting the tissue base material 10a may be any of cellulose fibers such as rayon, cotton and pulp, polyolefin fibers such as PP (polypropylene) and PE (polyethylene), and polyester synthetic fibers such as PET (polyethylene terephthalate). Can be used.
Moreover, it is preferable that the fiber which comprises the tissue base material 10a contains the heat-fusible fiber (binder fiber) which mutually fuses fiber. As the heat-fusible fiber, for example, any fiber that melts by heating and exhibits adhesiveness to each other can be used. This heat-fusible fiber may be composed of a single fiber or a composite fiber in which two or more synthetic resins are combined.

  The chemical solution 20 is a chemical solution for wet tissue containing, as a main component, water (purified water) containing, for example, a preservative such as ethanol, a moisturizing agent such as propylene glycol, and a pH adjusting agent such as citric acid.

In the present embodiment, each tissue base material 10a constituting the base material laminate 10 is folded in a Z shape, for example, as shown in FIG. Specifically, the tissue base material 10a is a sheet material having a substantially rectangular shape in plan view, and one fold line is a valley fold and the other fold line is two fold lines parallel to one side of the tissue base material 10a. It is folded to be a mountain fold. Hereinafter, the extending direction of the folding line is referred to as “front-rear direction”, and the direction orthogonal to both the up-down direction (stacking direction of the tissue base material 10a) and the front-rear direction is referred to as “left-right direction”.
Therefore, the tissue base material 10a has a center portion sandwiched between two fold lines with a fold line as a boundary, an upper portion located above the center portion in a state of being folded in three in a Z shape, and a lower side. It can be divided into a lower part and a lower part.
And the upper edge part of the other tissue base material 10a folded in Z shape is pinched | interposed between the center part and lower part of one tissue base material 10a folded in Z shape.

In the present embodiment, the position of the folding line is set to the same position in each of the tissue base materials 10a.
Therefore, for example, as shown in FIG. 1, the lower end portion (lower end portion) of one tissue base material 10a and the upper portion of another tissue base material 10a sandwiched between folded portions of the one tissue base material 10a. The overlapping portion L with the end portion (upper end portion) is aligned along the vertical direction (stacking direction of the tissue base material 10a).
Therefore, the base material laminate 10 can be divided into a first region 11 extending from one side in the up-down direction where the overlapping portion L is arranged to the other side, and a second region 12 other than the first region 11. it can. In the case of this embodiment, the length in the front-rear direction and the length in the left-right direction are the same as the length in the front-rear direction and the length in the left-right direction of the overlapping portion L, and the length in the up-down direction is the upper and lower sides of the substrate laminate 10. Second regions 12 having a substantially rectangular parallelepiped shape are arranged on both left and right sides of the first region 11 having a substantially rectangular parallelepiped shape that is the same as the length in the direction.

  In the present embodiment, the impregnation rate of the chemical solution 20 in the first region 11 is set to be lower than the impregnation rate of the chemical solution 20 in the second region 12. Here, the impregnation rate of the chemical solution 20 in the first region 11 (or the second region 12) is the first region relative to the weight of the first region 11 (or the second region 12) in the state where the chemical solution 20 is not impregnated. 11 (or the second region 12) is a percentage of the weight of the chemical solution 20 impregnated.

The wet tissue 1a (tissue base material 10a) is folded in a pop-up manner. Therefore, when the uppermost wet tissue 1a is pulled out from the outlet M1 to the outside of the container M, the end portion (upper end portion) of the wet tissue 1a of the next layer that is sandwiched between the uppermost portions protrudes from the outlet M1. Pulled to position.
Adhesion between the wet tissues 1a, especially the overlapping portion L (that is, the end (lower end) of one wet tissue 1a and the end (upper end) of another wet tissue 1a sandwiched between them) If the uppermost wet tissue 1a is pulled out from the outlet M1 to the outside of the container M, the uppermost wet tissue 1a and the next wet tissue 1a are hardly separated. Become. If it is difficult for the wet tissue 1a of the uppermost layer and the wet tissue 1a of the next layer to be separated from each other, the protrusion length of the wet tissue 1a of the next layer (the length of the portion protruding from the outlet M1) may be longer than necessary. Sheets of wet tissue 1a are pulled out continuously.

The problem that the protruding length of the wet tissue 1a of the next layer becomes longer than necessary or that a plurality of wet tissues 1a are pulled out in series, that is, the problem that the wet tissue 1a jumps out unnecessarily is the problem. The viscosity of the chemical solution impregnated in the material 10a and the impregnation rate (impregnation amount) of the chemical solution are related. For example, when the chemical solution has a high viscosity or high impregnation rate, sticking of the overlapping portion L becomes strong, and such a problem tends to occur frequently. Therefore, in a conventional wet tissue laminate, that is, a wet tissue laminate in which the chemical solution is uniformly applied to the entire substrate laminate and the impregnation rate of the chemical solution is uniform, the chemical solution such as a moisturizing agent has a viscosity. It has been difficult to add an increasing component or to set the impregnation rate of the chemical solution high.
On the other hand, in this embodiment, the impregnation rate of the chemical solution in the first region 11 where the overlapping portion L is arranged is set lower than the impregnation rate of the chemical solution in the second region 12 other than the first region 11. Yes. Therefore, the sticking of the overlapping portion L can be weakened without any restriction on the viscosity of the chemical solution and the impregnation rate of the chemical solution (in this case, the impregnation rate of the chemical solution 20 in the second region 12). Unnecessary pop-out can be suppressed. The impregnation rate of the chemical solution 20 in the first region 11 needs to be limited, and is appropriately set according to the viscosity of the chemical solution 20 and the composition of the tissue base material 10a.

If the first region 11 is not impregnated with the chemical 20 at all, sticking of the overlapping portion L becomes too weak, and when the uppermost wet tissue 1a is pulled out, the next wet tissue 1a is taken out. It may fall into the container M without protruding from M1.
Moreover, if the chemical | medical solution 20 is not impregnated at all in the 1st area | region 11, the impregnation nonuniformity between the part located in the 1st area | region 11 and the part located in the 2nd area | region 12 will become more remarkable. In some cases, the feeling of use and the antiseptic effect may be deteriorated. In the case of folding in the present embodiment, when the wet tissue 1a is spread, it is located in the first region 11 (both ends and the center in the direction perpendicular to the fold line) and in the second region 12. Since the portions that have been formed appear alternately, it is easy to feel impregnation unevenness especially when the wet tissue 1a is spread and used.

Therefore, the first region 11 may not be impregnated with the chemical solution 20 at all, or may be impregnated with the chemical solution 20, but is preferably impregnated with the chemical solution 20.
When the first region 11 is impregnated with the chemical solution 20, the first region 12 may be uniformly impregnated with the chemical solution 20, or only a part of the first region 12 (for example, both end portions of the first region 12 in the left-right direction) Or only the central part in the left-right direction) may be impregnated with the chemical solution 20.
It is preferable that the second region 12 is uniformly impregnated with the chemical solution 20.

The outlet M1 provided in the container M is normally provided in a substantially central portion in a plan view of the container M as shown in FIGS. 2 (a) and 3 (a), for example.
Therefore, when the overlapping portion L is in the central portion in the left-right direction of the wet tissue laminate 1 (base material laminate 10), for example, as shown in FIG. 2B, the uppermost wet tissue 1a is pulled out. Sometimes, the overlapping portion L of the wet tissue 1a of the uppermost layer and the wet tissue 1a of the next layer does not contact the edge of the outlet M1. Or even if it contacts, the big resistance is not provided to the said overlap part L. FIG.
On the other hand, for example, when the overlapping portion L is at a position shifted from the central portion in the left-right direction of the wet tissue laminate 1 (base material laminate 10), for example, as shown in FIG. When the wet tissue 1a is pulled out, the overlap portion L between the wet tissue 1a of the uppermost layer and the wet tissue 1a of the next layer comes into contact with the edge of the outlet M1, and a large resistance is given to the overlap portion L. The That is, the wet tissue 1a of the next layer can be pressed at the edge of the outlet M1 so that the wet tissue 1a of the next layer does not jump out unnecessarily.

Accordingly, the first region 11 may be disposed at a position that does not deviate from the outlet M1, for example, as shown in FIG. 2 (a), or, for example, as shown in FIG. 3 (a). Although it may be arranged at a position deviated from M1, it is preferably arranged at a position deviated from the outlet M1 from the viewpoint of more effectively suppressing unnecessary protrusion of the wet tissue 1a.
Here, “the first region 11 is arranged at a position shifted from the outlet M1” means that the center line in the left-right direction of the outlet M1 (extends in the front-rear direction through the center in the left-right direction of the outlet M1). Line) and the center line in the left-right direction of the first region 11 (a line extending in the front-rear direction through the center in the left-right direction of the first region 11) do not overlap in the up-down direction. The first region 11 may be invisible or may be visible.
Of course, the outlet M1 provided in the container M may not be provided in the approximate center of the container M in plan view. Therefore, the position of the first region 11 can be arbitrarily changed as appropriate according to the position of the outlet M1.

  In FIG. 2 and FIG. 3, the lid that opens and closes the outlet M1 is not shown, but the lid may be a lid that opens and closes by rotating its open end in the vertical direction. The lid may be opened and closed by sliding with respect to the container M.

<Method for producing wet tissue laminate>
Next, an example of the manufacturing method of the wet tissue laminated body of this embodiment is demonstrated with reference to FIGS.
First, one tissue base material 10a is folded, and the other tissue base material 10a is folded with the end of the other tissue base material 10a sandwiched between the folded portions (the upper end portion in this embodiment). The base material laminated body 10 in which a plurality of tissue base materials 10a are continuously laminated is formed (laminated body forming step).
Here, in the laminated body forming step, the other tissue base material 10a sandwiched between the end portion of one tissue base material 10a (the lower end portion in this embodiment) and the folded portion of the one tissue base material 10a. The tissue base material 10a is folded and laminated so that the overlapping portion L of the end portion (the upper end portion in the case of the present embodiment) is aligned along the vertical direction (stacking direction of the tissue base material 10a), The base material laminate 10 is formed.

Next, the chemical solution 20 is applied to the formed base material laminate 10 (chemical solution application step).
Here, in the chemical solution application step, the base so that the impregnation rate of the chemical solution 20 in the first region 11 of the base material laminate 10 is lower than the impregnation rate of the chemical solution 20 in the second region 12 of the base material laminate 10. The chemical solution 20 is applied to the material laminate 10.

Specifically, in the chemical solution application step, the chemical solution 20 is applied to the substrate laminate 10 using the chemical solution application nozzle N.
The chemical solution application nozzle N is provided with a plurality of ejection holes Na for ejecting the chemical solution 20, and is a first portion arranged immediately above the first region 11 of the substrate laminate 10 in the chemical solution application step. N1 and a second portion N2 disposed immediately above the second region 12 of the base laminate 10. In the case of the present embodiment, the ejection holes Na are arranged in a line.

  For example, as shown in FIG. 4, when a chemical solution application nozzle N in which the ejection hole Na is not formed in the first portion N1 is used, the wet tissue laminate in which the chemical solution 20 is not impregnated in the first region 11 at all. 1 is manufactured.

  Further, for example, as shown in FIG. 5 and FIG. 6, when the chemical solution application nozzle N is used in which the occupation ratio of the ejection holes Na in the first portion N1 is lower than the occupation ratio of the ejection holes Na in the second portion N1. The wet tissue laminate 1 in which the chemical solution 20 is impregnated in the first region 11 is manufactured. Here, the occupation ratio of the ejection holes Na in the first portion N1 (or the second portion N2) is the first portion N1 (or the second portion N2) with respect to the surface area of the first portion N1 (or the second portion N2). It is a percentage of the sum total of the opening area of the ejection hole Na provided in.

In the chemical application nozzle N shown in FIG. 5, the diameter of the ejection hole Na formed in the first part N1 is substantially the same as the diameter of the ejection hole Na formed in the second part N2, and the unit in the first part N1 The number of ejection holes Na per length is configured to be smaller than the number of ejection holes Na per unit length in the second portion N2. Here, the number of ejection holes Na per unit length in the first part N1 (or second part N2) is the number of ejection holes Na provided in the first part N1 (or second part N2). It is a value divided by the length of the first part N1 (or the second part N2).
Further, in the chemical solution coating nozzle N shown in FIG. 6, the number of ejection holes Na per unit length in the first portion N1 is substantially the same as the number of ejection holes Na per unit length in the second portion N2. The diameter of the ejection hole Na formed in the first part N1 is configured to be smaller than the diameter of the ejection hole Na formed in the second part N2.

In addition, the chemical | medical solution application | coating nozzle N in which the occupation rate of the ejection hole Na in the 1st part N1 is lower than the occupation rate of the ejection hole Na in the 2nd part N2 is not restricted to the nozzle shown in FIG. For example, the number of ejection holes Na per unit length in the first portion N1 is smaller than the number of ejection holes Na per unit length in the second portion N2, and the first portion N1 The nozzle which the diameter of the formed ejection hole Na may be smaller than the diameter of the ejection hole Na formed in the 2nd part N2 may be sufficient.
4 to 6 show the chemical solution application nozzle N for applying the chemical solution 20 to the base material laminate 10 in which the first region 11 (overlapping portion L) is provided at the center in the left-right direction. As described above, the first region 11 (overlapping portion L) may not be provided in the central portion in the left-right direction. Accordingly, the positions and lengths of the first portion N1 and the second portion N1 of the chemical solution application nozzle N are arbitrarily determined depending on the positions and widths (lengths in the left-right direction) of the first region 11 and the second region 12. It can be changed.

The manufactured wet tissue laminate 1 is stored in a container M. Or when the manufactured wet tissue laminated body 1 is a laminated body for refilling, for example, it is packaged in a package (not shown).
In addition, when the opening (opening for taking out the wet tissue 1a) is provided in the package for packaging the wet tissue laminate 1, the first region 11 of the wet tissue laminate 1 is shifted from the opening. Although it may be arrange | positioned in the position and may be arrange | positioned in the position which does not shift | deviate from the said opening, the viewpoint of suppressing the unnecessary pop-out of the wet tissue 1a more effectively similarly to the outlet M1 of the container M. Therefore, it is preferable that the lens is disposed at a position shifted from the opening.

  Hereinafter, the present invention will be described with reference to specific examples, but the present invention is not limited thereto.

<Example>
First, a non-woven fabric having a composition of 50% rayon, 30% PET fiber, 20% binder fiber and dimensions of 150 mm in the MD direction and 175 mm in the CD direction was prepared as the tissue base material 10a.
Next, as the substrate laminate 10, a laminate as shown in FIG. 7A, specifically, the length of the substrate laminate 10 in the left-right direction is 80 mm, and the length of the first region 11 in the left-right direction. A laminated body in which the length in the left-right direction of the second region 12 on the right side of the first region 11 is 10 mm was prepared. That is, the base material laminated body 10 in which the overlapping portion L is at a position shifted from the central portion in the left-right direction was produced.

Next, as a chemical solution 20, a non-alcohol-based chemical solution, specifically, a moisturizing agent, propylene glycol as an emulsifier is added, a small amount of other preservatives such as parabens are added, and a pH adjuster such as sodium citrate is added. A chemical solution to which a very small amount was added was prepared.
Here, since the surface tension of the chemical | medical solution 20 increases compared with the case where the chemical | medical solution 20 is a non-alcohol prescription, compared with the case where it is not a non-alcohol prescription, the wet tissues 1a will adhere more strongly.

Subsequently, the chemical | medical solution 20 was apply | coated to the produced base material laminated body 10 so that the impregnation rate might be 230%, and the wet tissue laminated body 1 (henceforth "the wet tissue laminated body of an Example") was produced.
Here, as shown in FIG. 7 (a), in the first region 11, the chemical solution 20 is applied only to both end portions in the left-right direction (the length of each portion in the left-right direction is 1 mm), and the other portions ( The chemical solution 20 was not applied to the portion where the length in the left-right direction was 13 mm. The chemical solution 20 was uniformly applied to portions to which the chemical solution 20 was applied (both end portions in the left and right directions of the second regions 12 and 12 and the first region 11).

Next, the wet tissue laminate of the example was put in a package, and the outlet M1 was stored in a container M provided in a substantially central portion in plan view.
Here, since the overlap portion L of the wet tissue laminate of the embodiment is provided at a position shifted from the central portion in the left-right direction of the wet tissue laminate (see FIG. 7A), the wet tissue of the embodiment is provided. In a state where the stacked body is stored in the container M, the position of the first region 11 is shifted from the outlet M1.

<Comparative example>
Further, as a comparative example, a wet tissue laminate in which the impregnation rate of the chemical solution is uniform, that is, a wet tissue laminate in which the impregnation rate of the chemical solution 20 in the first region 11 is the same as the impregnation rate of the chemical solution 20 in the second region 12. Was made. The wet tissue laminate of the comparative example is the same as the wet tissue laminate of the example except that the impregnation ratio of the chemical solution is uniform.
Then, the wet tissue laminate of the comparative example is put in the same package as the package containing the wet tissue laminate of the example, and stored in the same container as the container M storing the wet tissue laminate of the example. did.

<Evaluation>
And the pop-up property of the wet tissue laminated body of an Example was evaluated. Specifically, the operation of taking out the wet tissue 1a one by one from the outlet M1 one by one 45 times was repeated three times, and the average of the number of consecutive times and the number of depressions (repetitive average) was calculated. Further, the cue length (projection length) of the wet tissue 1a of the next layer when one wet tissue 1a was taken out was measured, and the average was also calculated.
The wet tissue laminate of the comparative example was also evaluated for pop-up properties by the same method.
The result is shown in FIG.

As shown in FIG. 7 (b), in the wet tissue laminate of the comparative example, the wet tissue of the next layer came out in succession by 10.2 times out of 45 times.
On the other hand, in the wet tissue laminate of the example, the wet tissue of the next layer came out continuously in 1.3 out of 45 out operations.
Thus, it was found that the number of consecutive times can be improved by making the chemical solution impregnation rate in the first region 11 lower than the chemical solution impregnation rate in the second region 12.

Further, in the wet tissue laminate of the comparative example, the protruding length of the next wet tissue 1a (the length of the portion protruding from the outlet M1) was 76 mm on average.
On the other hand, in the wet tissue laminate of the example, the protruding length of the next wet tissue 1a was 45 mm on average.
Thus, it was found that the cue length can be improved by making the impregnation rate of the chemical solution in the first region 11 lower than the impregnation rate of the chemical solution in the second region 12.

Further, in the wet tissue laminate of the comparative example, the wet tissue of the next layer dropped into the container M without protruding from the take-out port M1 in the take-out operation of 0.3 out of 45 take-out operations.
On the other hand, in the wet tissue laminated body of the example, the wet tissue of the next layer fell into the container M without protruding from the outlet M1 by the removal operation of 0.7 out of 45 extraction operations.
Thereby, even if the impregnation rate of the chemical | medical solution in the 1st area | region 11 was made lower than the impregnation rate of the chemical | medical solution in the 2nd area | region 12, it turned out that the frequency | count of depression does not deteriorate.

  According to the wet tissue laminate 1 of the present embodiment described above, one tissue base material 10a is folded, and the other tissue base material 10a is sandwiched between the end portions of the other tissue base material 10a. Is formed of a base material laminate 10 in which a plurality of tissue base materials 10a are continuously laminated, and a chemical solution 20 impregnated in the tissue base material 10a, and an end portion of one tissue base material 10a. And the overlapping portion L of the other tissue base material 10a sandwiched between the folded portions of the one tissue base material 10a are aligned along the stacking direction of the tissue base material 10a. The body 10 includes a first region 11 extending from one side to the other side in the stacking direction of the tissue base material 10a on which the overlapping portion L is disposed, and a second region 1 other than the first region 11. When, in the division, impregnation ratio of the chemical 20 in the first region 11 is lower than the impregnation rate of the chemical solution 20 in the second region 12.

  Therefore, since it is possible to weaken the sticking of the overlapping portion L without setting restrictions on the viscosity of the chemical solution or the impregnation rate of the chemical solution or devising how to fold the wet tissue 1a (tissue base material 10a), It is possible to provide a wet tissue laminate in which unnecessary protrusion of the wet tissue 1a is sufficiently suppressed.

Moreover, according to the wet tissue laminated body 1 of this embodiment demonstrated above, it can be accommodated in the container M provided with the outlet M1, and when it accommodates in the container M, the 1st area | region 11 becomes the outlet M1. It can be configured to be arranged at a position shifted from the position.
By comprising in this way, it becomes possible to suppress effectively the unnecessary protrusion of the wet tissue 1a.

  According to the manufacturing method of the wet tissue laminate 1 of the present embodiment described above, one tissue base material 10a is folded, and the other tissue base material 10a is sandwiched between the folded portions. A laminate forming step for forming a substrate laminate 10 in which a plurality of tissue substrates 10a are continuously laminated by folding the substrate 10a, and a chemical solution applying step for applying the chemical solution 20 to the substrate laminate 10 In the laminated body forming step, the end portion of one tissue base material 10a overlaps with the end portion of another tissue base material 10a sandwiched between the folded portions of the one tissue base material 10a. The tissue base material 10a is folded and laminated so that the portion L is aligned along the stacking direction of the tissue base material 10a (in this embodiment, the vertical direction), The material laminate 10 is divided into a first region 11 extending from one side to the other side in the stacking direction of the tissue base material 10a on which the overlapping portion L is arranged, and a second region 12 other than the first region 11. In the chemical solution application step, the chemical solution 20 is applied to the substrate laminate 10 so that the impregnation rate of the chemical solution 20 in the first region 11 is lower than the impregnation rate of the chemical solution 20 in the second region 12. Yes.

  Therefore, since it is possible to weaken the sticking of the overlapping portion L without setting restrictions on the viscosity of the chemical solution or the impregnation rate of the chemical solution or devising how to fold the wet tissue 1a (tissue base material 10a), It is possible to sufficiently suppress unnecessary jump out of the wet tissue 1a.

  Specifically, according to the method for manufacturing the wet tissue laminate 1 of the present embodiment described above, in the chemical solution application step, a plurality of ejection holes Na for ejecting the chemical solution 20 are provided, and the chemical solution application step The chemical solution 20 is applied using the chemical solution application nozzle N having the first portion N1 disposed immediately above the first region 11 and the second portion N2 disposed directly above the second region 12. It has become.

Examples of the chemical application nozzle N include a nozzle (see FIG. 4) in which the ejection hole Na is not formed in the first portion N1, or the occupancy ratio of the ejection hole Na in the first portion N1 is the ejection hole Na in the second portion N2. It is possible to use a nozzle or the like lower than the occupation ratio.
As the chemical solution coating nozzle N in which the occupation ratio of the ejection holes Na in the first part N1 is lower than the occupation ratio of the ejection holes Na in the second part N2, the diameter of the ejection holes Na formed in the first part N1 is second. The diameter of the ejection hole Na formed in the part N2 is substantially the same, and the number of ejection holes Na per unit length in the first part N1 is greater than the number of ejection holes Na per unit length in the second part N2. The number of nozzles (see FIG. 5), and the number of ejection holes Na per unit length in the first portion N1 are substantially the same as the number of ejection holes Na per unit length in the second portion N2. A nozzle (see FIG. 6) in which the diameter of the ejection hole Na formed in the part N1 is smaller than the diameter of the ejection hole Na formed in the second part N2, and the ejection hole Na per unit length in the first part N1 The number is simply the second part N2. It is possible to use a nozzle or the like that is smaller than the number of ejection holes Na per length and whose diameter of the ejection holes Na formed in the first portion N1 is smaller than the diameter of the ejection holes Na formed in the second portion N2. it can.

The chemical solution application nozzle N is a nozzle that can apply the chemical solution 20 to the substrate laminate 10 so that the impregnation rate of the chemical solution 20 in the first region 11 is lower than the impregnation rate of the chemical solution 20 in the second region 12. If there is, it is not limited to the nozzle described above, and can be arbitrarily changed as appropriate.
The manufacturing method of the present embodiment is not limited to the method using the chemical solution application nozzle N, and the impregnation rate of the chemical solution 20 in the first region 11 is lower than the impregnation rate of the chemical solution 20 in the second region 12. In addition, any method that can apply the chemical solution 20 to the substrate laminate 10 can be arbitrarily changed.

<Modification 1>
Next, a modified example of the method for manufacturing the wet tissue laminate will be described with reference to FIGS.
First, the chemical | medical solution 20 is apply | coated to the tissue base material 10a (tissue base material before a cutting | disconnection to a predetermined magnitude | size) (chemical | medical solution application | coating step).
Here, in the chemical solution application step, the tissue so that the impregnation rate of the chemical solution 20 in the first region 11 of the base material laminate 10 is lower than the impregnation rate of the chemical solution 20 in the second region 12 of the base material laminate 10. The chemical solution 20 is applied to the base material 10a.

Next, the tissue base material 10a to which the chemical solution 20 is applied is cut into a predetermined size (cutting step).
In addition, it is also possible to apply | coat the chemical | medical solution 20 to the tissue base material 10a cut | disconnected by the predetermined magnitude | size. That is, the cutting step may be performed before the chemical solution application step.

Next, one tissue base material 10a (that is, one wet tissue 1a) applied with the chemical solution 20 and cut to a predetermined size is folded, and the chemical solution 20 is applied to the folded portion and cut into a predetermined size. The other tissue base material 10a is folded while the other tissue base material 10a (that is, the other wet tissue 1a) is sandwiched, so that a plurality of wet tissue 1a are continuously laminated. The wet tissue laminate 1 is formed (laminate formation step).
Here, in the laminated body forming step, the other tissue base material 10a (others) sandwiched between the end of one tissue base material 10a (one wet tissue 1a) and the folded portion of the one tissue base material 10a. The tissue base material 10a coated with the chemical solution 20 is folded so that the overlapping portion L with the end of the wet tissue 1a) is aligned along the vertical direction (the stacking direction of the tissue base material 10a (wet tissue 1a)). The wet tissue laminate 1 is formed by laminating the layers.

In the chemical solution application step, for example, as shown in FIG. 8, the pattern roll R1 having a predetermined pattern of irregularities on the outer circumferential surface and the outer circumferential surface of the pattern roll R1 are pressed against the irregularities of the outer peripheral surface of the pattern roll R1. A press roll R2 having an outer peripheral surface, a transfer roll R3 having an outer peripheral surface in contact with the outer peripheral surface of the pattern roll R1, and a chemical solution supply means R4 for supplying the chemical solution 20 to the outer peripheral surface of the transfer roll R3. Using the roll transfer apparatus R, the chemical solution 20 is applied to the tissue base material 10a by pressing the tissue base material 10a against the pattern roll R1 with the press roll R2.
The pattern roll R1 of the roll transfer device R is a unit in a portion other than the portion L * where the application amount of the chemical solution 20 per unit area in the portion L * of the tissue base material 10a that is the overlapping portion L is the overlapping portion L. The pattern has irregularities that are smaller than the coating amount of the chemical solution 20 per area. Here, the “application amount of the chemical solution 20 per unit area in the portion L * that is the overlapping portion L of the tissue base material 10a” means the chemical solution 20 applied to each portion L * of the single tissue base material 10a. Of the one tissue base material 10a (the sum of the amount of the chemical solution 20 applied to the one portion L * and the amount of the chemical solution 20 applied to the other portion L * in this modification). It is a value obtained by dividing the sum of the areas of the respective portions L * (the sum of the area of one portion L * and the area of the other portion L * in this modification). Of course, the “amount of the chemical 20 applied to the portion L *” may be 0 (zero).

Specifically, as the pattern roll R1, for example, as shown in FIG. 9A, the chemical solution 20 is not applied to both ends in the left-right direction, which is the portion L * that becomes the overlapping portion L, and overlaps. In a portion other than the portion L * which becomes the portion L, it is possible to use a pattern roll R1 having pattern irregularities capable of obtaining the wet tissue 1a to which the chemical solution 20 is applied. Here, in FIG. 9A, FIG. 10A, and FIG. 11A, a portion indicated by dot-shaped hatching is a portion to which the chemical solution 20 is applied.
For example, as shown in FIG. 9B, the tissue base material 10a (the tissue base material cut to a predetermined size) to which the chemical solution 20 is applied using the pattern roll R1 is folded in a Z-shape. Then, another tissue base material 10a (other wet tissue) folded in the Z shape between the central portion and the lower portion of one tissue base material 10a (one wet tissue 1a) folded in the Z shape. When folded so that the upper end portion of 1a) is sandwiched, the impregnation rate of the chemical solution 20 in the first region 11 of the base laminate 10 is greater than the impregnation rate of the chemical 20 in the second region 12 of the base laminate 10. It is possible to produce a wet tissue laminate 1 having a low thickness.

Further, as the pattern roll R1, for example, as shown in FIG. 10A, the chemical solution 20 is not applied at all to one of the both ends in the left-right direction, which is the portion L * that becomes the overlapping portion L, and the overlapping portion. Pattern irregularities capable of obtaining the wet tissue 1a coated with the chemical solution 20 on the other of the left and right end portions that are L portions L * and the portions other than the portion L * that is the overlapping portion L It is possible to use a pattern roll R1 having
For example, as shown in FIG. 10B, the tissue base material 10a (the tissue base material cut to a predetermined size) coated with the chemical solution 20 using the pattern roll R1 is folded in three in a Z shape. Then, another tissue base material 10a (other wet tissue) folded in the Z shape between the central portion and the lower portion of one tissue base material 10a (one wet tissue 1a) folded in the Z shape. When folded so that the upper end portion of 1a) is sandwiched, the impregnation rate of the chemical solution 20 in the first region 11 of the base laminate 10 is greater than the impregnation rate of the chemical 20 in the second region 12 of the base laminate 10. It is possible to produce a wet tissue laminate 1 having a low thickness.

Further, as the pattern roll R1, for example, as shown in FIG. 11A, the chemical solution 20 is not applied at all to a part of both end portions in the left-right direction that is the portion L * that becomes the overlapping portion L, The wet tissue 1a coated with the chemical 20 is obtained on both the left and right end portions that are the portion L * that becomes the portion L, and the portion other than the portion L * that becomes the overlapping portion L. It is possible to use a pattern roll R1 having an uneven pattern.
For example, as shown in FIG. 11B, the tissue base material 10a (the tissue base material cut to a predetermined size) to which the chemical solution 20 is applied using the pattern roll R1 is folded in a Z-shape. Then, another tissue base material 10a (other wet tissue) folded in the Z shape between the central portion and the lower portion of one tissue base material 10a (one wet tissue 1a) folded in the Z shape. When folded so that the upper end portion of 1a) is sandwiched, the impregnation rate of the chemical solution 20 in the first region 11 of the base laminate 10 is greater than the impregnation rate of the chemical 20 in the second region 12 of the base laminate 10. It is possible to produce a wet tissue laminate 1 having a low thickness.

In FIG. 11 (a), at both ends in the left-right direction, which is a portion L * that becomes the overlapping portion L, a portion to which the chemical solution 20 is applied and a portion to which the chemical solution 20 is not applied are alternately arranged in the front-rear direction. Although the example in the case of applying the chemical solution 20 with the pattern roll R1 having the uneven patterns arranged in a line is shown, the present invention is not limited to this. For example, at both end portions in the left and right direction that are the portions L * that become the overlapping portions L It is also possible to apply the chemical solution 20 with a pattern roll R1 having a pattern in which the chemical solution 20 is applied, a portion where the chemical solution 20 is not applied, and a pattern that is alternately arranged in the left-right direction.
Further, in FIG. 11A, both a portion where the chemical solution 20 is applied and a portion where the chemical solution 20 is not applied are formed at both ends in the left-right direction, which is the portion L * which becomes the overlapping portion L. Although the example at the time of apply | coating the chemical | medical solution 20 with the pattern roll R1 which has the unevenness | corrugation of such a pattern was shown, it is not restricted to this, For example, one of the both ends of the left-right direction which is the part L * used as the overlap part L In addition, both a portion to which the chemical solution 20 is applied and a portion to which the chemical solution 20 is not applied are formed, and only the portion to which the chemical solution 20 is applied (or the portion to which the chemical solution 20 is not applied) is formed on the other end of the both ends. It is also possible to apply the chemical solution 20 with a pattern roll R1 having pattern irregularities such that

  According to the manufacturing method of the wet tissue laminate 1 of the first modified example described above, the chemical solution application step of applying the chemical solution 20 to the tissue substrate 10a, the one tissue substrate 10a applied with the chemical solution 20 is folded, Wet tissue in which a plurality of wet tissues 1a are continuously laminated by folding the other tissue base material 10a with the end portion of the other tissue base material 10a coated with the chemical solution 20 applied to the folded portion. A laminated body forming step for forming the laminated body 1. In the laminated body forming step, another tissue sandwiched between an end portion of one tissue base material 10a and a folded portion of the one tissue base material 10a. The chemical solution 20 is applied so that the overlapping portion L with the end of the base material 10a is aligned along the stacking direction of the tissue base material 10a. In the chemical solution application step, the tissue base material 10a is folded so that the impregnation rate of the chemical solution 20 in the first region 11 is lower than the impregnation rate of the chemical solution 20 in the second region 12. The chemical solution 20 is applied to the surface.

  Therefore, since it is possible to weaken the sticking of the overlapping portion L without setting restrictions on the viscosity of the chemical solution or the impregnation rate of the chemical solution or devising how to fold the wet tissue 1a (tissue base material 10a), It is possible to sufficiently suppress unnecessary jump out of the wet tissue 1a.

  Specifically, according to the manufacturing method of the wet tissue laminate 1 of Modification 1 described above, in the chemical solution application step, the pattern roll R1 having irregularities on the outer peripheral surface and the outer peripheral surface of the pattern roll R1. A press roll R2 having an outer peripheral surface that is brought into contact with and pressed against the irregularities on the outer peripheral surface of the pattern roll R1, a transfer roll R3 having an outer peripheral surface in contact with the outer peripheral surface of the pattern roll R1, and an outer periphery of the transfer roll R3 The chemical solution 20 is applied to the surface using the chemical solution supply means R4, and the pattern roll R1 applies the chemical solution 20 per unit area in the portion L * that is the overlapping portion L of the tissue base material 10a. The pattern recesses such that the amount is less than the application amount of the chemical solution 20 per unit area in a portion other than the portion L * that becomes the overlapping portion L. The has.

The pattern roll R1 is a roll that can apply the chemical solution 20 to the tissue base 10a so that the impregnation rate of the chemical solution 20 in the first region 11 is lower than the impregnation rate of the chemical solution 20 in the second region 12. The roll is not limited to the above-mentioned roll, and can be arbitrarily changed as appropriate.
Moreover, the manufacturing method of the modification 1 is not restricted to the method using pattern roll R1, press roll R2, transfer roll R3, and chemical | medical solution supply means R4, The impregnation rate of the chemical | medical solution 20 in the 1st area | region 11 However, any method can be used as appropriate as long as the chemical solution 20 can be applied to the tissue base material 10a so as to be lower than the impregnation rate of the chemical solution 20 in the second region 12.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. Moreover, you may apply combining the structure of the above-mentioned embodiment and modification. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Wet tissue laminated body 1a Wet tissue 10 Base material laminated body 10a Tissue base material 11 1st area | region 12 2nd area | region 20 Chemical solution L Overlapping part M Container M1 Outlet N Chemical solution application nozzle Na Ejection hole N1 1st part N2 2nd part

Claims (2)

A chemical application step for applying a chemical to the tissue substrate;
A plurality of sheets are obtained by folding one tissue base material coated with the chemical solution and folding the other tissue base material with an end of the other tissue base material coated with the chemical solution sandwiched between the folded portions. A laminate forming step of forming a wet tissue laminate in which the wet tissues are continuously laminated, and
In the laminated body forming step, an overlapping portion between an end portion of one tissue base material and an end portion of another tissue base material sandwiched between folded portions of the one tissue base material is an area of the tissue base material. Folding and stacking the tissue base material coated with the chemical solution so as to line up in the stacking direction,
In the chemical solution application step, the impregnation rate of the chemical solution in the first region extending from one side to the other side in the stacking direction of the tissue base material on which the overlapping portion is disposed is other than the first region of the wet tissue laminate. A method for producing a wet tissue laminate, wherein the chemical solution is applied to the tissue base so that the impregnation rate of the chemical solution in a certain second region is lower. In the chemical solution application step,
A pattern roll having irregularities of a predetermined pattern on the outer peripheral surface;
A press roll having an outer peripheral surface that is in contact with the outer peripheral surface of the pattern roll and pressed against the irregularities of the outer peripheral surface of the pattern roll;
A transfer roll having an outer peripheral surface in contact with the outer peripheral surface of the pattern roll;
Applying the chemical using the chemical supply means for supplying the chemical to the outer peripheral surface of the transfer roll,
The pattern roll has pattern irregularities such that the amount of the chemical solution applied per unit area in the first region is smaller than the amount of the chemical solution applied per unit area in the second region. The manufacturing method of the wet tissue laminated body of Claim 1.

Images