JP7442163B2 - Moisturizing paper manufacturing method and manufacturing device - Google Patents

Description

The present invention relates to a method for producing moisturizing paper, and relates to a technique for adjusting the amount of liquid applied to base paper of moisturizing paper.

In recent years, high-performance tissue paper coated with a chemical solution that increases moisture retention has been developed to improve the texture of the skin. This is expected to have the effect of suppressing skin irritation and roughness even when users with allergies such as hay fever use tissue paper frequently. Products are provided that aim to improve the texture of the skin and make it feel moisturized. As sales of such high-performance tissue paper increase, various proposals are being made regarding its manufacturing method.

Patent Document 1 discloses a technology related to lotion tissue paper. Consisting of one or two or more sheets whose main component is pulp, each sheet has a basis weight of 17.0 to 20.0 g/m ² and a paper thickness of 0.78 to 0.95 mm/10 sheets. is the square root of the product of the dry tensile strength DMDT based on JIS P8113 and the horizontal tensile strength when dry of the lotion tissue paper coated with the chemical solution (DMDT x DCDT) ^1/2 The expressed DGMT is 1.0 to 1.9 N/25 mm. This technology makes it possible to ensure the softness and volume of lotion tissue paper, as well as suppress wrinkles and improve business viability.

Patent Document 2 discloses a technique related to a method for manufacturing moisturizing tissue paper. A moisturizing agent is applied to the base paper manufactured in the papermaking process (coating process), the moisturizing base paper coated with the humectant is absorbed with the moisturizing agent (aging process), and the aged moisturizing base paper is cut into the desired width. In the production method, which is folded into moisturizing tissue paper (commercialization process), the surface of the base paper is controlled based on the hand feel value. This technology can improve the moist feel of moisturizing tissue paper.

JP2016-60982A JP2021-106786 public relations

However, when moisturizing tissue paper is manufactured by the methods of Patent Document 1 and Patent Document 2, the following problems are considered to occur.

In the methods of Patent Document 1 and Patent Document 2, the chemical solution to be applied to the base paper is supplied from a chemical tank to an anilox roll, further transfers the chemical solution from the anilox roll to a rubber roll, and brings the rubber roll into contact with the base paper. A chemical solution is being applied. In this chemical application method, it is thought that the amount of chemical applied can be adjusted by changing the size and density of the cells carved into the surface of the anilox roll, but the applied chemical does not spread over the entire base paper. As it spreads, the moisture is thought to reduce the strength of the base paper.

In this case, a problem arises in that the tissue paper is easily torn when the user uses it. This problem can be solved by increasing the paper thickness, increasing the density, or improving the quality of the paper, but this results in a proportional increase in cost. In addition, relatively expensive chemicals are often used, so if thick base paper is used, it becomes necessary to use a larger amount of chemicals, further increasing the cost. Therefore, there is a need to save the amount of chemical solution used.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve such problems and provide a method and apparatus for producing a moisturizing paper that can save the amount of chemical solution applied, and a moisturizing paper using the same.

In order to achieve the above object, a moisturizing paper manufacturing apparatus according to one aspect of the present invention has the following features.

(1) In a moisturizing paper manufacturing device that coats a chemical solution containing a humectant on base paper manufactured in the papermaking process,
A point embossing roll in which convex portions are regularly provided on the surface of a cylindrical roll, and anilox laser engraving is performed on the tips of the convex portions;
a transfer roll that transfers the chemical solution to the point embossing roll;
the point embossing roll is pressed against the base paper, and the chemical solution is applied to the base paper;
It is characterized by

According to the aspect described in (1) above, the amount of chemical solution applied to the base paper is reduced and the strength of the moisturizing paper after coating is not lowered more than necessary, so when the user uses the moisturizing paper, it is difficult to tear and it is convenient. Contribute to improving. This is because the chemical liquid is applied to the base paper using a point embossing roll, and the chemical liquid is transferred to the tip of the convex part provided on the surface of the point embossing roll and then applied to the base paper. . The protrusions provided on the surface of the point embossing roll are regularly arranged on the outer circumferential surface of the point embossing roll, so the base paper has a specific pattern in which areas are coated with the chemical solution and areas where it is not. be done.

Specifically, a coated area, such as a polka dot pattern, is formed on the base paper, and the strength of the uncoated area does not decrease, resulting in a moisturizing paper that is hard to tear. If this moisturizing paper is a moisturizing tissue paper, for the user, as long as the medicinal solution is attached to the part that touches the skin, the feeling of use is not so great compared to the conventional paper that has the medicinal solution coated on the entire surface. does not change. Therefore, it is possible to provide a moisturizing paper that does not impair the user's tactile sensation while reducing the amount of applied chemical solution, which also contributes to cost reduction. Furthermore, it is possible to provide a moisturizing paper that is hard to tear.

(2) In the moisturizing paper manufacturing apparatus described in (1),
In the point embossing roll, a pair of a first roll and a second roll are arranged facing each other, and the convex part of the first roll and the convex part of the second roll engage with each other so as to face the base paper. being pressed and coating the chemical solution on the base paper;
is preferred.

According to the aspect described in (2) above, when applying the chemical solution to the moisturizing paper, the chemical solution is applied to the outside (front and back sides) of the moisturizing paper, so for example, if it is a double tissue paper, it will be applied only to the outside. Chemical liquid coating will be performed. Therefore, by not applying the chemical to the back side which does not need to be coated with the chemical, the amount of the chemical used can be reduced, contributing to cost reduction. On the other hand, the user does not touch the inside of the double tissue paper, so the feeling of use is not affected.

Further, in order to achieve the above object, a method for manufacturing a moisturizing paper according to another aspect of the present invention has the following characteristics.

(3) In a method for producing moisturizing paper, in which a chemical solution containing a humectant is applied to base paper produced in a papermaking process in a coating process,
Transferring a chemical solution to the convex portions of a point embossing roll having regular convex portions on the surface using a transfer roll,
Applying the chemical solution by pressing the convex portion of the point embossing roll against the base paper;
It is characterized by

According to the aspect described in (3) above, similarly to the moisturizing paper manufacturing apparatus described in (1), by applying a chemical solution to the base paper using a point embossing roll, it is possible to provide a moisturizing paper that is hard to tear. can. Furthermore, it is possible to reduce the amount of chemical solution to be applied, which can contribute to cost reduction.

(4) In the method for producing a moisturizing paper according to (3),
The point embossing roll includes a first roll and a second roll,
The first roll and the second roll are arranged facing each other as a pair, and the convex part of the first roll and the convex part of the second roll engage with each other so as to face each other and are pressed against the base paper. , the chemical solution is applied to the base paper;
is preferred.

According to the aspect described in (4) above, similarly to the moisturizing paper manufacturing apparatus described in (2), by not applying a chemical solution to the back side that does not originally need to be coated with a chemical solution, The amount of chemical solution used can be reduced, contributing to cost reduction.

Furthermore, in order to achieve the above object, a moisturizing paper according to another aspect of the present invention has the following characteristics.

(5) In moisturizing paper that has a moist feel by coating the base paper with a chemical solution,
In the coating step of coating the chemical solution,
a point embossing roll having convex portions with anilox laser engraving on the tip arranged regularly on its surface;
A transfer roll that supplies the chemical solution is used,
The convex portion of the point embossing roll is pressed against the base paper while holding the chemical solution at its tip, whereby the base paper is coated with the chemical solution, and the coated portion is regularly arranged. and a pattern consisting of uncoated parts arranged between the coated parts is formed on its surface;
It is characterized by

According to the aspect described in (5) above, similar to the moisturizing paper manufactured by the manufacturing apparatus described in (1) or (2) or the manufacturing method described in (3) or (4), the moisture-retaining paper is hard to tear. Paper can be provided. Furthermore, it is possible to reduce the amount of chemical solution to be applied, which can contribute to cost reduction.

FIG. 1 is a schematic diagram of a manufacturing apparatus according to a first embodiment. It is a schematic diagram which enlarged a part of the coating machine of 1st Embodiment. FIG. 3 is a partially enlarged view of the coating mechanism section of the first embodiment. It is a perspective view of a point embossing roll of a 1st embodiment. It is a partially enlarged view of the first embodiment. It is a top view of the moisturizing paper of 1st Embodiment. It is a perspective view of the point embossing roll of 2nd Embodiment. It is a partially enlarged view of a 2nd embodiment. It is a top view of the moisturizing paper of 2nd Embodiment. It is a schematic diagram of the manufacturing apparatus of 3rd Embodiment.

First, a first embodiment of the present invention will be described using the drawings. FIG. 1 shows a schematic diagram of a manufacturing apparatus 100 according to the first embodiment. The manufacturing apparatus 100 is composed of four machines: an unwinding machine 110, an edge embosser 120, a coating machine 130, and a loom 140, and unwinds base paper S manufactured in a papermaking process (not shown) and coats it with a chemical solution. It has a function of folding moisturizing paper P that has been cut to a predetermined width.

Each configuration will be briefly explained. First, the unwinding machine 110 unwinds the base paper S from the base roll 10. The original fabric roll 10 is arranged at two locations on the unwinding machine 110. In the first embodiment, since the moisturizing tissue paper P is double layered, the raw fabric roll 10 is made of two plies. Next, the edge embosser 120 performs embossing in parallel to the paper feeding direction so that the stacked two-ply base paper S does not shift. Then, the coating machine 130 coats the base paper S with a chemical solution in a procedure that will be described later. Finally, in the loom 140, the moisturizing tissue paper P is folded alternately and packed into boxes. Note that although it is assumed that tissue paper base paper with a thickness of about 40 μm is wound around the raw fabric roll 10, the thickness may be changed as appropriate.

Since the present invention is characterized by the coating machine 130 of the manufacturing apparatus 100, the configuration of the coating machine 130 will be described next.

A part of the coating machine 130 will be explained using a schematic diagram in FIG. The base paper S is conveyed to the coating machine 130 through the edge embosser 120, and is coated with a chemical solution by passing between the first point embossing roll 31 and the second embossing roll 32 provided in the coating machine 130. Ru. Here, for convenience, they are referred to as the first point embossing roll 31 and the second point embossing roll 32, but hereinafter, when the point embossing roll 30 is referred to as the point embossing roll 30 without particular instructions, the first point embossing roll 31 or the second point embossing roll This refers to either or both of the embossing rolls 32.

A chemical liquid transfer roll 33 is placed in contact with each of the point embossing rolls 30 . An anilox roll 35 is placed in contact with the chemical transfer roll 33 . The chemical liquid is supplied from a chamber (not shown), transferred to the chemical liquid transfer roll 33 via the anilox roll 35, and then supplied to the point embossing roll 30. The chemical solution used here is assumed to be a humectant containing glycerin as a main ingredient, but is not limited to this.

On the surface of the anilox roll 35, countless small cells each having a certain volume are engraved using a laser engraving machine or the like, and a chemical solution supplied from a chamber (not shown) is stored inside these cells. At this time, by scraping the surface with a doctor blade (not shown), a fixed amount of the chemical can be supplied to the surface of the chemical transfer roll 33. The chemical liquid transfer roll 33 is a roller whose surface is made of resin, and supplies the chemical liquid to the point embossing roll 30.

The base paper S unwound from the unwinding machine 110 passes through an edge embosser 120 and between a first point embossing roll 31 and a second point embossing roll 32 to be coated with a chemical solution. Then, it is sent to the loom 140. The coating machine 130 is equipped with a first free roller 131 that supports the base paper S on the input side and a second free roller 132 that supports the base paper S on the output side. is maintained.

FIG. 3 shows a partially enlarged view of the coating mechanism section. FIG. 4 shows a perspective view of the point embossing roll 30. FIG. 5 shows an enlarged view of the surface of the point embossing roll 30. As shown in FIG. 4, the point embossing roll 30 has points 310 and recesses 320 provided at equal intervals (in a checkered pattern) on its surface. The recess 320 is provided at a position one step lower than the point 310, that is, the recess 320 is cut.

The top of Point 310 is approximately 1 mm on a side, and the top surface has been subjected to surface treatments such as hard chrome plating and ceramic spraying, and then has countless small cells with a certain capacity made by laser engraving. It is provided. When the top of this point 310 touches the surface of the chemical transfer roll 33, a predetermined amount of the chemical is transferred and impregnated into the cells provided at the top of the point 310, and when the top of this point 310 comes into contact with the base paper S, A chemical solution can be applied to the surface of the base paper S.

Further, the points 310 of the point embossing roll 30 are formed in the same way on the first point embossing roll 31 and the second point embossing roll 32, respectively, and the positions are adjusted so that they mesh with each other. In other words, as shown in FIG. 3, the tops of the points 310 abut (engage) with each other via the base paper S. Therefore, the difference in height between the point 310 and the groove 320 is formed as a step that is at a distance from the base paper S and does not touch the base paper S when the first point embossing roll 31 and the second point embossing roll 32 face each other. Such a configuration is provided in the coating machine 130 in parallel at two locations: the first coating mechanism section 130A and the second coating mechanism section 130B.

Since the manufacturing apparatus 100 of the first embodiment has the above configuration, it has the following operations and effects.

First, by using the manufacturing apparatus 100 of the first embodiment, it is possible to suppress the amount of the chemical solution applied. This is because, in the moisturizing tissue paper P manufacturing apparatus 100 that applies a chemical solution containing a humectant to base paper S manufactured in the papermaking process, convex portions (points 310) are regularly provided on the surface of a cylindrical roll. , a point embossing roll 30 with anilox laser engraving applied to the tip of the point 310, and a chemical liquid transfer roll 33 for transferring a chemical liquid to the point embossing roll 30, and the point embossing roll 30 is pressed against the base paper S, This is because the chemical liquid is applied to the base paper S.

FIG. 6 shows a plan view of the moisturizing tissue paper P. With the above configuration, points 310 are provided on the surface of the point embossing roll 30 for the base paper S as shown in FIG. 4, and the chemical solution is held at the top and applied to the surface of the base paper S. In other words, the finished moisturizing tissue paper P has a coated area M coated with the chemical solution (shown as shaded in FIG. 6 for clarity) and an uncoated area D where the chemical solution is not coated. They will be arranged alternately in a grid pattern. As a result, the area of the coated portion M is half the surface area of the moisturizing tissue paper P, which means that the amount of chemical solution required for coating is also half.

Since the chemical solution used in the moisturizing tissue paper P has a high unit price, simply by reducing the area coated with the chemical solution, the amount of the chemical solution required for manufacturing can be reduced. As a result, it becomes possible to lower the manufacturing cost of the moisturizing tissue paper P.

In addition, compared to the case where a chemical solution is applied to the entire surface of the moisturizing tissue paper P, the amount of chemical solution applied is halved, and the moisture contained in the moisturizing tissue paper P is reduced, resulting in a smoother texture. . Although tactile preferences differ from person to person, it is thought that users who do not like products with a strong wet feel will accept them favorably. Furthermore, since the uncoated areas D are provided in a regular arrangement, the tensile strength of the moisturizing tissue paper P is increased.

In addition, in the apparatus 100 for manufacturing moisturizing tissue paper P, the point embossing roll 30 has a pair of a first point embossing roll 31 and a second point embossing roll 32 arranged facing each other, and points 310 of the first point embossing roll 31 and a pair of second point embossing rolls 32 are arranged facing each other. The structure is such that the point 310 of the second point embossing roll 32 is engaged with the embossing roll 32 and pressed against the base paper S, and the chemical solution is applied to the base paper S, so if it is a double moisturizing tissue paper P, the outer As a result, the chemical solution is applied only to the area. This makes it possible to further reduce the amount of chemical solution applied, contributing to cost reduction.

In this case, only the outside of the moisturizing tissue paper P (because it is double-sided) is coated with a chemical solution, and the inside is not coated with a chemical solution. This means that the medicinal solution is applied only to the areas that come into direct contact with the user's skin. Therefore, it is possible to reduce the amount of chemical solution used without impairing the function of the moisturizing tissue paper P. Furthermore, it is difficult to recycle the cut-off portions, scraps, etc. produced during the manufacturing process of the moisturizing tissue paper P because they are coated with a chemical solution. For this reason, unnecessary parts need to be disposed of as industrial waste, but since the amount of chemical solution attached is reduced, the weight can be reduced, and as a result, it can also contribute to lowering disposal costs.

Next, a second embodiment of the present invention will be described using the drawings. The manufacturing apparatus 100 of the second embodiment has the same configuration as the first embodiment, but the shape of the point embossing roll 30 is slightly different, so this point will be explained.

FIG. 7 shows a perspective view of the point embossing roll of the second embodiment. FIG. 8 shows an enlarged view of the surface of the point embossing roll. As shown in FIG. 8, in the point embossing roll 30 of the second embodiment, grooves 321 are cut and provided, and points 310 are regularly arranged at predetermined intervals. The groove portion 321 will be provided at a position lower than the point 310.

The top of the point 310 is approximately 1 mm on one side, and countless small cells with a certain capacity are provided on the top surface by laser engraving. When the top of this point 310 touches the surface of the chemical transfer roll 33, a predetermined amount of the chemical is transferred to the cells provided at the top of the point 310, and when the top of this point 310 comes into contact with the base paper S, the base paper S A chemical solution can be applied to the surface. Note that the shape of the points 310 may be circular or elliptical convex portions (not shown) formed on the outer peripheral surface of the point embossing roll 30 in a similar arrangement.

FIG. 9 shows a plan view of the moisturizing tissue paper P. Since the manufacturing apparatus 100 of the second embodiment has the above configuration, as shown in FIG. 9, the coated area M (shaded in FIG. 9 for ease of understanding) coated with the chemical solution is defined. The uncoated parts D, which are arranged at intervals and are not coated with the chemical solution, are arranged in a grid pattern. As a result, the area of the coated portion M is half the surface area of the moisturizing tissue paper P, which means that the amount of chemical solution required for coating is also half.

Further, since the coating pattern is such that the uncoated portion D is continuously formed and the coated portion M exists independently, the strength of the moisturizing tissue paper P can be expected to be improved. This is because the moisturizing tissue paper P, which is a base paper S whose entire surface is coated with a chemical solution, contains moisture evenly, and the strength of the paper decreases depending on the moisture content. However, by forming discontinuous coated areas M and having continuously formed uncoated areas D, the strength of the moisturizing tissue paper P can be maintained without significantly decreasing from the base paper S. .

Next, a third embodiment of the present invention will be described using the drawings. The manufacturing apparatus (ply machine 105) of the third embodiment has a similar configuration to that of the first embodiment, but includes a slit winder 150 instead of the loom 140. Therefore, after the raw fabric roll 10 is unwound and coated, slits are made in the width direction, the roll is wound up, and the log R is discharged. Note that, unlike the first embodiment, in the third embodiment, the coating machine 130 is provided with one coating mechanism section 130C.

In the coating mechanism section 130C, the chemical liquid is applied to the base paper S as in the first embodiment, so that the wound log R has a pattern as shown in FIG. 6, that is, the chemical liquid is applied. The coated portion M is coated with the chemical solution, and the uncoated portion D, which is not coated with the chemical solution, is alternately arranged in a lattice pattern and is wound up in a state coated with the chemical solution. As a result, it is possible to save the chemical liquid used in the ply machine 105. Further, by providing the uncoated portion D, it becomes possible to increase the tensile strength of the log R. Of course, it is possible to use a different pattern, such as using the point embossing roll 30 with the pattern used in the second embodiment.

Although the moisturizing tissue paper P manufacturing apparatus 100 and the like according to the present invention have been described above, the present invention is not limited thereto, and various changes can be made without departing from the spirit thereof. For example, in the first to third embodiments, the point embossing roll 30 is provided with two points, a first point embossing roll 31 and a second point embossing roll 32, and the base paper S is passed between them. However, if the moisturizing tissue paper P has two sides, and requires a front surface to be coated with a chemical solution and a back surface to which a chemical solution is not coated, the point embossing roll 30 can be used only on one side, and only on the corresponding side. An impression cylinder may be provided.

In addition, in the first to third embodiments, FIGS. 6 and 9 show the pattern of the area M coated with the chemical liquid formed on the moisturizing tissue paper P. Since the purpose is to alternately arrange the coated portions M and the uncoated portions D, there is no hindrance to changing to other patterns or sizes. For example, the coated area M on the surface of the moisturizing tissue paper P may be circular, and the overall pattern may be a polka dot pattern. Alternatively, another geometric repeating pattern or a pattern using another pattern with uncoated portions D may be adopted. Further, although the description is given as moisturizing tissue paper P, the present invention is not limited to tissue paper, and the present invention may be applied to thicker paper.

P Moisturizing tissue paper S Base paper 10 Raw roll 30 Point embossing roll 33 Chemical transfer roll 35 Anilox roll 100 Manufacturing equipment

Claims (4)

In a moisturizing paper manufacturing device that applies a chemical solution containing a humectant to base paper manufactured in the papermaking process,
A point embossing roll in which convex portions are regularly provided on the surface of a cylindrical roll, and the top surface of the convex portions has countless small cells having a constant volume engraved ;
a transfer roll that transfers the chemical solution to the point embossing roll,
The convex portion of the point embossing roll, the top surface of which has been transferred and impregnated with the chemical solution, is pressed against the base paper, and the chemical solution is applied to the base paper;
A moisturizing paper manufacturing device featuring: The moisturizing paper manufacturing apparatus according to claim 1,
The point embossing roll includes a first roll and a second roll,
The first roll and the second roll are arranged facing each other as a pair, and the convex part of the first roll and the convex part of the second roll engage with each other so as to face each other and are pressed against the base paper. , the chemical solution is applied to the base paper;
A moisturizing paper manufacturing device featuring: In a method for producing moisturizing paper, in which a chemical solution containing a humectant is applied to base paper produced in a papermaking process in a coating process,
A point embossing roll is provided with regular protrusions on its surface, and a countless number of small cells having a certain volume are engraved on the top surface of the protrusions. Transfer the chemical solution,
Applying the chemical solution by pressing the convex portion of the point embossing roll against the base paper;
A method for producing a moisturizing paper characterized by: In the method for producing a moisturizing paper according to claim 3,
The point embossing roll includes a first roll and a second roll,
The first roll and the second roll are arranged facing each other as a pair, and the convex part of the first roll and the convex part of the second roll engage with each other so as to face each other and are pressed against the base paper. , the chemical solution is applied to the base paper;
A method for producing a moisturizing paper characterized by:

Images