WO2017168931A1

WO2017168931A1 - Tissue paper manufacturing method

Info

Publication number: WO2017168931A1
Application number: PCT/JP2017/000530
Authority: WO
Inventors: 翔平吉田
Original assignee: 大王製紙株式会社
Priority date: 2016-03-31
Filing date: 2017-01-11
Publication date: 2017-10-05
Also published as: JP6310493B2; JP2017176761A

Abstract

[Problem] To further improve the softness of tissue paper to which a chemical liquid is applied. [Solution] The problem is solved by a tissue paper manufacturing method comprising: a primary chemical liquid application step for applying an oil-based chemical liquid in an amount of 0.20-0.75 g/m² per side onto at least one side of a tissue paper base sheet laminate obtained by laminating two tissue paper base sheets each having a basis weight of 10-25 g/m²; and a secondary chemical liquid application step for applying a water-based chemical liquid in a total amount of 2.0-5.0 g/m² in the sides, onto the tissue paper base sheet laminate having the oil-based chemical liquid applied thereto at the primary chemical liquid application step, from the side of the tissue paper base sheet laminate on which the oil-based chemical liquid has been applied.

Description

Tissue paper manufacturing method

The present invention relates to a method for manufacturing tissue paper. In particular, the present invention relates to a method for manufacturing tissue paper to which a chemical solution is applied.

ドライ Dry type tissue paper used for biting moths and wiping the skin is well known. Among such dry-type tissue papers, there is a tissue paper to which a chemical liquid mainly composed of a polyol such as glycerin, which is called a moisturizing tissue or a lotion tissue, is applied.

Moisturizing tissue has a higher moisture content in the paper due to the moisture-absorbing action of polyol, and is superior in softness and moistness compared to general-purpose tissue paper to which no chemical solution is applied.

Conventionally, this moisturizing tissue has a water-based chemical solution called a lotion chemical solution, which is mainly composed of a polyol and water, which have a hygroscopic effect, and a small percentage of oil, such as liquid paraffin, on tissue paper. Manufactured by coating by a method or roll transfer.

This water-based chemical solution has good affinity with pulp fibers, and after being applied to tissue paper, it penetrates into the paper, and the entire tissue paper has a moisture absorption effect by polyol and is contained in the chemical solution. The liquid paraffin adheres to the fiber, thereby imparting slipperiness to the fiber surface.

On the other hand, in such a moisturizing tissue, there is a demand for further improvement in softness and smoothness, but in conventional manufacturing methods, the amount of chemical solution applied is increased, or the content of oily components in the chemical solution is simply increased. If used, tissue paper will become sticky and the feeling of use will deteriorate.

JP 2012-170657 A JP 2011-206529 A JP 2011-206075 A JP 2008-245780 A

Therefore, a main problem of the present invention is to provide a method for producing tissue paper to which a chemical solution to which moist feeling, softness and smoothness are further increased is applied.

The present inventors considered that in the conventional manufacturing method, the aqueous chemical solution penetrates into the base paper, so that the amount of polyol acting on the surface of tissue paper is reduced, and the effect of the aqueous chemical solution is not sufficiently expressed. And it came to the completion of this invention which solved said subject. The invention is as follows.

[Invention of Claim 1]
A primary chemical solution application step of applying an oil-based chemical solution to at least one surface of a laminated tissue paper base paper in which two sheets of tissue paper having a basis weight of 10 to 25 g / m ² are laminated, to 0.20 to 0.75 g / m ² per side; ,
^2. Apply a total of 2.0 to 5.0 g / m ^{2 of} aqueous chemical solution from the surface to which the oil-based chemical solution is applied to the laminated tissue paper base paper to which the oil-based chemical solution is applied in the primary chemical solution application step. A next chemical solution application step;
A method for producing tissue paper, comprising:

[Invention of Claim 2]
The method for producing tissue paper according to claim 1, wherein the oil-based chemical is an emulsion of a substance selected from the group of mineral oil, collagen, liquid paraffin, and fatty acid amide derivatives, or a mixture thereof.

[Invention of Claim 3]
The method for producing tissue paper according to claim 1, wherein the aqueous chemical solution contains 70% by mass or more of polyol.

[Invention of Claim 4]
The method for producing tissue paper according to claim 1, wherein in the primary chemical solution application step, the oil-based chemical solution is applied by a gravure method.

[Invention of Claim 5]
The method for producing tissue paper according to claim 1, wherein the secondary chemical solution application step applies the aqueous chemical solution by spray coating.

The present invention applies a small amount of oil-based chemical to tissue paper before applying a water-based chemical that increases moisture content to tissue paper.

The oil-based chemical solution does not have good permeability to the tissue paper base like the water-based chemical solution, and therefore remains on the surface of the tissue paper base, which is the application surface. In addition, since the oil-based chemical liquid mainly improves smoothness due to the slipperiness of the oily component, the tissue paper to which the oil-based chemical liquid is applied to the surface easily feels smoothness. Oil-based chemicals tend to feel sticky, but if an aqueous chemical solution is applied from the application surface after the oil-based chemical solution is applied, the sticky feeling decreases.

Furthermore, by applying a small amount of oil-based chemical prior to applying the water-based chemical, the moisture content of the tissue paper is further increased, making it very easy to feel moist and soft.

The reason for this is not clear, but if a small amount of oil-based chemical is applied prior to applying the water-based chemical, the penetration of the water-based chemical into the tissue paper is confirmed to be somewhat slower, which has an effect. It is thought that there is. The penetration of aqueous chemicals into tissue paper becomes slow, and the effectiveness of aqueous chemicals near the surface of tissue paper due to the ease of compatibility with the oily chemicals present on the surface of tissue paper as the active ingredient in aqueous chemicals. It is considered that the orientation of an active ingredient that causes many components to occur is generated. In addition, since the oil-based component is present on the surface of the tissue paper, it is considered that the moisture taken into the paper is less likely to evaporate due to the moisture absorption effect of the aqueous chemical solution.

Furthermore, by applying a small amount of oil-based chemical solution to the laminated tissue paper base prior to the aqueous chemical solution, the strength of the tissue paper during the application of the aqueous chemical solution is less likely to occur, and the productivity is improved.

As described above, according to the present invention, there is provided a method for producing tissue paper to which a chemical solution having a moist feeling, softness and smoothness and having excellent productivity is provided.

It is a figure for demonstrating the manufacturing method of the tissue paper of embodiment of this invention. It is a figure for demonstrating the state of the surface of the tissue paper base paper to which the chemical | medical solution was provided according to embodiment of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In the method for producing tissue paper according to the present invention, a primary chemical solution applying step for applying an oil-based chemical solution to both surfaces of a laminated tissue paper base paper in which two sheets of tissue paper are laminated, and an oil-based chemical solution is applied in this primary chemical solution applying step. And a secondary chemical solution applying step for applying an aqueous chemical solution to the laminated tissue paper base paper.

Here, the tissue paper to which the chemical solution according to the present invention is applied is not a wet tissue in a wet state impregnated with the chemical solution, but a dry type tissue paper used for biting a wrinkle or wiping the skin. This dry type tissue paper is supplied to consumers and the like as a tissue paper product in which a bundle formed by folding and laminating a plurality of sheets is stored in a paper storage box or the like. And, tissue paper products are generally made of laminated tissue paper by laminating tissue paper made in the paper making process to make tissue paper multiple paper ply, making paper from raw paper. Through a laminating process for base paper, a folding process for folding and laminating laminated tissue paper base paper formed in the laminating process, and a packaging process for storing a bundle of tissue paper formed in the folding process in a storage box etc. It is manufactured.

Therefore, in the method for producing tissue paper according to the present invention, the primary chemical solution application step and the secondary chemical solution application step are performed by laminating the tissue paper base paper in the laminating step and then forming the folded tissue paper base paper into a folded bundle in the folding step. It may be performed in between.

Hereinafter, as a particularly preferred embodiment, an example in which the primary chemical solution applying step and the secondary chemical solution applying step are performed in the stacking facility X1 that performs the stacking step will be described. However, the present invention is not limited to this embodiment.

FIG. 1 shows a stacking facility X1 according to this embodiment. In the present embodiment, two primary raw rolls JR, JR, which are also called jumbo rolls manufactured in the preceding paper making process, are set in the laminating equipment X1. The primary raw rolls JR and JR are wound around tissue paper base papers S11 and S12 which are strip-shaped crepe papers made by a paper machine.

In the present invention, the basis weight of the tissue paper is 10 to 25 g / m ² . It is preferably 11 to 20 g / m ² , more preferably 12 to 17 g / m ² . In addition, the basic weight here is based on the measuring method of JISP8124 (1998). When the basis weight is in the range of 10 to 25 g / m ² , it is possible to ensure the softness and strength that tissue paper can be made when 2-ply tissue paper is used, and in particular, each chemical solution in the primary chemical solution application step and the secondary chemical solution application step In the application amount of the chemical solution of the present invention in the application process, the effect of the present invention is exhibited. The basis weight of tissue paper may be 10 to 25 g / m ² according to a known paper making technique in the paper making process. Note that the tissue paper base paper is preferably a raw material pulp containing NBKP (conifer kraft pulp) and LBKP (hardwood kraft pulp). In this case, the blending ratio (JIS P 8120) is preferably such that NBKP: LBKP is 30:70 to 60:40.

In the laminating equipment X1 according to the present embodiment, each of the tissue paper base papers S11, S12 continuous in a strip shape fed from the set two primary raw rolls JR, JR is laminated in the ply means 51 along the continuous direction. The laminated tissue paper base paper S2. It is desirable that the tissue paper base sheets S11 and S12 are stacked such that the surface of the tissue paper base sheets becomes both outer surfaces when stacked. Note that the surfaces of the tissue paper base sheets S11 and S12 are surfaces that are in contact with the glossy surface of the Yankee dryer during drying in the paper making process. Since the surface is less fuzzy and smoother than the opposite back surface, it is preferable that this surface is configured to be both outer surfaces of the laminated tissue paper S2.

In the laminating facility X1 according to the present embodiment, the primary chemical solution applying means 53 and the aqueous chemical solution are applied in the primary chemical solution applying step of applying the oil-based chemical solution to the laminated tissue paper base paper S2 after the ply means 51. The secondary chemical solution applying means 40 in the secondary chemical solution applying step is provided in this order, and the primary chemical solution applying step and the secondary chemical solution applying step are sequentially performed in the process of transporting the laminated tissue paper S2. .

The oil-based chemical solution to be applied in the primary chemical solution application step contains oily components such as vegetable oil, mineral oil, collagen, liquid paraffin, and fatty acid amide derivatives as active ingredients, and is particularly emulsified with an emulsifier such as a surfactant. It is. However, silicones such as polysiloxane and modified silicone are not desirable among oil components. When silicones are applied, they act on the tissue paper to generate “squeaks”, and therefore the present invention may impair the softness of the tissue paper. The emulsifier is not limited and may be selected from known ones, but is selected in consideration that tissue paper is used for hygiene applications that touch the skin. A suitable oily chemical is an emulsion of a substance selected from the group of mineral oil, collagen, liquid paraffin, and fatty acid amide derivatives, or a mixture of these emulsions. These are excellent in the effect of improving smoothness and softness and are easy to apply. The proportion of oily components such as mineral oil in the emulsion is 5% by mass to 50% by mass. When the ratio of the oil component is less than 5% by mass, sufficient effects in the present invention are not exhibited. On the other hand, when the ratio of the oil component exceeds 50% by mass, the stickiness peculiar to the oil-based chemical solution is increased on the tissue paper surface, and the usability is deteriorated.

In the present invention, 0.20 to 0.75 g / m ^{2 of} oil-based chemical solution is applied to one side of the laminated tissue paper base paper S2 in which the above-mentioned tissue paper base papers having a basis weight of 10 to 25 g / m ² are laminated. More, preferred applied amount is 0.20 ~ 0.50g / m ^2, more preferred applied amount is 0.20 ~ 0.45g / m ^2. The oil-based chemical solution may be applied to only one side of the laminated tissue paper, but it is desirable to apply it to both sides. When applied to both sides, the total amount of oil-based chemical solution applied to the laminated tissue paper base is 0.40 to 1.0 g / m ² .

In the illustrated form, two

gravure printing machines

53A and 53B are provided in the laminating equipment X1 to apply oil-based chemicals to one side and the other side of the laminated tissue paper S2. Since the application of the oil-based chemical solution can be applied uniformly on the entire surface of the tissue paper, application by a gravure method such as the above gravure printing machine is suitable. This is because the gravure method is particularly suitable for application of oil-based substances. Application is possible even with the flexographic method, but in the case of flexographic printing, it is inferior to the gravure method in terms of adjusting the coating amount and generating unevenness.

The amount of the oil-based chemical solution applied in the present invention is small as the amount of the chemical solution applied to the tissue paper base paper. In particular, even when only the oil-based chemical solution is applied to the tissue paper base with this applied amount, a sticky feeling is produced, but the smoothness of the tissue paper does not sufficiently improve. The application of the oil-based chemical solution according to the present invention should also be referred to as pre-application that acts so that the softness and smoothness of the aqueous chemical solution can be felt more remarkably. When the amount of the oil-based chemical solution applied to one side is less than 0.20 g / m ² , sufficient effects are not exhibited in relation to the basis weight of the tissue paper base and the application of the aqueous chemical solution of the present invention. On the other hand, if it is applied in excess of 0.75 g / m ² with respect to one side, the stickiness peculiar to oil-based chemicals increases and the feeling of use deteriorates. In particular, the less sticky feeling that the aqueous chemical solution has as an advantage over the oil-based chemical solution is eliminated. In addition, when the aqueous chemical solution is applied in the secondary chemical solution applying step, the penetration of the aqueous chemical solution into the tissue paper base paper is excessively slowed, and the possibility that the aqueous chemical solution accumulates on the paper surface and the productivity is lowered.

In the laminating equipment X1 according to the present embodiment, the laminated tissue paper base paper S2 coated with the oil-based chemical solution in the primary chemical solution applying unit 53 in the primary chemical solution applying step is transferred to the secondary chemical solution applying unit 40 in the subsequent secondary chemical solution applying step. It is guided and an aqueous chemical is applied. At this time, as shown in FIG. 2, the penetration of the aqueous chemical solution 20 into the tissue paper base is delayed by the oil-based chemical solution 10 present on the surface layer of the laminated tissue paper base paper S2. This aqueous chemical solution is also referred to as a lotion chemical solution, and has a hygroscopic polyol as a main component. The preferred components of the aqueous chemical solution are those containing 70 to 90% by weight of polyol, 5 to 15% by weight of water, and 0.01 to 10% by weight of functional chemicals. Examples of the polyol include glycerin, diglycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, sorbitol, glucose, xylitol, maltose, maltitol, mannitol, and trehalose. A particularly preferred polyol is glycerin. Functional chemicals are softening agents such as anionic surfactants, cationic surfactants and zwitterionic surfactants, hydrophilic polymers that assist the hygroscopicity of polyols such as glucomannan, and smoothness such as liquid paraffin. Oily ingredients to enhance, emulsifiers, preservatives, antifoaming agents and the like. As described above, the aqueous chemical solution of the present invention may contain an oily component. The oily component in the aqueous chemical solution need not be the same as the active ingredient of the oil-based chemical solution applied in the previous stage.

In the present invention, a laminated tissue paper S2 obtained by laminating the above-mentioned tissue paper having a basis weight of 10 to 25 g / m ² , and laminated tissue paper to which an oil-based chemical solution is applied at 0.20 to 0.75 g / m ² per side. An aqueous chemical solution is further applied to the base paper in a total amount of 2.0 to 5.0 g / m ² on both sides. Here, in this invention, an aqueous | water-based chemical | medical solution is provided from the surface provided with the oil-type chemical | medical solution of laminated tissue paper base paper. Therefore, when the oil-based chemical solution is applied only to one side of the laminated tissue paper, the aqueous chemical solution is applied only from the applied surface. When the oil-based chemical solution is applied to both surfaces of the laminated tissue paper S2, the aqueous chemical solution can be applied from both surfaces or one surface. Whether the aqueous chemical solution is applied only from one side or from both sides, the applied amount of the aqueous chemical solution is 2.0 to 5.0 g / m ^{2 in} total on both sides. If it is less than 2.0 g / m ² , the moisture absorption effect is not sufficiently exhibited, and moist feeling and softness are not sufficiently exhibited. Moreover, when it exceeds 5.0 g / m < ² >, a sticky feeling will be felt. Further, in the present invention, the laminated tissue paper base paper to which the aqueous chemical solution is applied is preliminarily provided with the oil-based chemical solution, and since the penetration of the aqueous chemical solution is slow, the aqueous system is applied to the surface when applied over 5.0 g / m ^2. The time that the chemical solution stays excessively increases the risk of deteriorating operability such as transportability of the laminated tissue paper.

The application of the aqueous chemical solution to the laminated tissue paper S2 can be performed by flexographic printing, roll transfer, and spray coating, but it is particularly preferable to apply by spray coating. In the present invention, since the oil-based chemical solution is preliminarily applied to the laminated tissue paper base paper S2 to which the aqueous chemical solution is applied, the surface of the tissue paper base sheet is difficult to become familiar with the aqueous chemical solution. In the case of an application method in which a chemical solution is transferred by bringing a printing plate such as flexographic printing or roll transfer into contact with the paper surface, coating unevenness may occur during application. In spray coating, since the chemical solution is sprayed on the entire paper surface in a non-contact manner, such coating unevenness hardly occurs. Examples of the spray coating apparatus that performs spray coating include a one-fluid or two-fluid nozzle spray system apparatus and a rotor dampening spray system apparatus. In the illustrated embodiment, two

spray coating apparatuses

40A and 40B are installed, and the aqueous chemical solution is applied by spraying from both surfaces of the laminated tissue paper base paper S2.

Here, it is desirable to apply the aqueous chemical solution in the present invention from both sides as shown in the figure, but it is not necessary to apply from both sides of the laminated tissue paper S2 as described above. Moreover, even if it is a case where it carries out from both surfaces, it is not necessary to give by equal amounts on each surface. Since the aqueous chemical solution penetrates into the tissue paper base after application, the aqueous chemical solution spreads over the entire tissue paper base until it becomes a product even if applied only from either side. However, as described above, in the present invention, the permeation of the aqueous chemical solution is slowed by the application of the preceding oil-based chemical solution, and therefore, when a large amount of the aqueous chemical solution is applied to one surface, the chemical solution may accumulate on the paper surface. For this reason, it is desirable to apply the oil-based chemical from both sides, and it is desirable to apply the water-based chemical from both sides, and it is desirable to make the both sides substantially equal.

In the laminating equipment X1 of this embodiment, the laminated tissue paper base paper to which the oil-based chemical solution and the water-based chemical solution are applied in this order through the primary chemical solution applying step and the secondary chemical solution applying step is subjected to the folding process in the subsequent stage. In order to use for the equipment to perform, it rolls up by the winding means 56 through the contact embossing means 54, the slit processing means 55, etc. suitably, and is set as the roll R. The roll used for the folding equipment for performing the folding process is also referred to as a secondary raw roll R. In addition, what is necessary is just to determine the slit space | interval in the case of performing a slit process suitably with the system of a back | latter stage folding equipment. Whether or not to perform the contact embossing may be selected depending on the method of the folding equipment for performing the subsequent folding process.

And in this embodiment, the roll R which wound up the laminated | tissue paper base paper to which the oil-type chemical solution and the water-type chemical solution were provided by the said application amount in this order through the primary chemical solution provision process and the secondary chemical solution provision process by the winding means 56. Is a bundle of stacks of individual tissue papers that are folded and laminated to a known folding facility such as a multi-stand type interfolder, a rotary type interfolder, or a pocket folding machine. Is done. The bundle is stored in a storage box or the like in a packaging process subsequent to the folding process by a known method to obtain a tissue paper product.

In the above embodiment, although the form which performs a primary chemical | medical solution provision process and a secondary chemical | medical solution provision process in the lamination | stacking installation X1 was demonstrated, this invention is not limited to this form. For example, after the primary chemical solution application step is performed in the stacking facility, the secondary chemical solution application step may be performed in the folding facility. You may perform both a primary chemical | medical solution provision process and a secondary chemical | medical solution provision process in folding equipment. In addition, after forming a roll of rolled tissue paper base paper to which only an oil-based chemical solution is applied by performing only the primary chemical solution application process in the lamination facility, before using this roll for folding equipment, printing equipment and spray coating equipment It is also possible to use a separate water-based chemical solution and apply a water-based chemical solution to the roll, and then roll the roll into a folding facility. In the present invention, the oil-based chemical solution and the aqueous-based chemical solution may be applied to the laminated tissue paper base paper in this order in the application amounts defined in the present invention, and the application position is not necessarily limited.

Examples 1 to 3 and Comparative Examples 1 to 3 according to the present invention were prepared. The tissue paper bases used in Examples 1 to 3 and Comparative Examples 1 to 3 had a basis weight of 14.0 g / m ² and were the same.

In Example 1, two sheets of this tissue paper base were laminated to form a laminated tissue paper base. The size of one set was 206 mm in the vertical direction (MD direction) and 223 mm in the horizontal direction (CD direction). Thereafter, 0.4 g / m ² of an oil-based chemical solution was applied to both surfaces, and then 2.4 g / m ² of an aqueous chemical solution was applied. As the oil-based chemical solution, liquid paraffin obtained by emulsifying O / W type was used. The viscosity of the oil-based chemical is 80 mPa · s at 40 ° C. An aqueous chemical solution containing 85% by mass of glycerin and 15% by mass of water was used. The viscosity of the aqueous chemical solution is 110 mPa · s at 40 ° C.

Example 2 applied 0.6 g / m ² of an oil-based chemical solution to both sides of the same laminated tissue paper base sheet as in Example 1, and then applied an aqueous chemical solution of 3.2 g / m ² . . In Example 3, 0.7 g / m ² of an oil-based chemical solution was applied to both sides of one set of the same laminated tissue paper base as in Example 1, followed by 4.8 g / m ² of an aqueous chemical solution. .

Comparative Example 1 applied only an aqueous chemical without applying an oil based chemical. The composition of the aqueous chemical solution used was the same as in Example 1, and the amount of active ingredient applied was the same as that in Example 1 in the amount of active ingredient.

The viscosity of each of the oil-based chemical solution and the water-based chemical solution was measured at a rotation speed of 60 rpm using a B-type viscometer.

Comparative Example 2 applied only an oil-based chemical without applying an aqueous chemical. The composition of the oil-based chemical solution used was the same as that in Example 1, and the amount of the active ingredient was applied in the same amount as in Example 1 as the amount of the active ingredient.

In Comparative Example 3, an aqueous chemical solution was applied first, followed by an oil chemical solution. The composition of the water-based / oil-based chemical solution used was the same as in Example 1, and the application amount was the same as that of Example 1 in the amount of the active ingredient.

First, when the sticky feeling of each example was evaluated, in Comparative Example 2 in which only the oil-based chemical solution was applied, although the amount of oil-based chemical solution applied was small, a sticky feeling peculiar to the oil-based chemical solution was generated, and only the water-based chemical solution was used. It was confirmed that the feeling of use deteriorated as compared with Comparative Example 1 in FIG.

Further, in Comparative Example 3, it was confirmed that the sticky feeling peculiar to the oil-based chemical solution was generated and the feeling of use was deteriorated as in Comparative Example 2 to which the aqueous chemical solution was applied.

In Examples 1 to 3 and Comparative Example 1, there was no sticky feeling peculiar to oil-based chemicals. For Examples 1 to 3 and Comparative Example, the moisture content contained in the tissue paper was further measured and sensory evaluation was performed. In Example and Comparative Example 1, three sheets were prepared, and the moisture content was measured at eight locations for each sample.

The measuring method of moisture content is based on the measuring method of JIS P 8127. The average value of the result of measuring 8 points for 3 sets of samples in each example was as follows. In Comparative Examples 2 and 3, the oil-based chemical solution was applied last, and the oil-based chemical solution was localized on the tissue paper surface. Therefore, the stickiness of the surface was increased, and the moisture content could not be measured.

Example 1: 11.40%
Example 2: 11.93%
Example 3: 12.21%
Comparative Example 1: 9.95%
In comparison, the Example according to the present invention has a moisture content of 1.45% or more higher than that of Comparative Example 1. Here, the oil-based chemical solution has little moisture absorption action and does not increase the moisture taken into the paper. And in the result of this test, although the composition and the applied amount of the aqueous chemical solution that increases the moisture content in the paper by the moisture absorption effect of glycerin are the same, the moisture content of the example is higher than the comparative example. It became. That is, the moisture content in the tissue paper can be increased by applying a small amount of oil-based chemical before applying the aqueous-based chemical. The improvement of moisture content increases moist feeling and softness. In addition, there was almost no stickiness due to the presence of the oil-based chemical solution, and the smoothness of the surface was improved.

Next, sensory evaluation was performed on N = 10 persons in these examples and comparative examples in a 7-step evaluation of evaluation points 1 to 7 (the best evaluation was 7 points). The results are shown in Table 1.

In Example 1, the smoothness is 5.4 points, the softness is 5.0 points, the moist feeling is 4.7 points, and the smoothness is 5. 8 points, softness 5.3 points, moist feeling 5.1 points, smoothness 6.3 points, softness 5.6 points, moist feeling 5.5 points in Example 3, comparison Compared with Example 1, the sensory evaluation values of Examples 1 to 3 are all improved.

On the other hand, in Comparative Example 2 and Comparative Example 3, it was confirmed that a sticky feeling peculiar to oil-based chemicals was generated on the tissue paper surface, and the usability was deteriorated.

As described above, according to the present invention, the moist feeling, softness, and smoothness of tissue-coated tissue paper can be further enhanced.

X1 ... Laminating equipment, 53 ... Primary chemical solution applying means, 53A, 53B ... Gravure printing machine, 40 ... Secondary chemical solution applying means, 40A, 40B ... Spray coating apparatus, JR ... Primary fabric roll (jumbo roll), R ... Roll (Secondary raw roll), 51 ... ply means, 54 ... contact embossing means, 55 ... slit processing means, 56 ... winding means, S11, S12 ... tissue paper base, S2 ... laminated tissue paper base, 10 ... oil System chemical, 20 ... Aqueous chemical.

Claims

A primary chemical solution application step of applying an oil-based chemical solution to at least one surface of a laminated tissue paper base paper in which two sheets of tissue paper having a basis weight of 10 to 25 g / m 2 are laminated, to 0.20 to 0.75 g / m 2 per side; ,
2. Apply a total of 2.0 to 5.0 g / m 2 of aqueous chemical solution from the surface to which the oil-based chemical solution is applied to the laminated tissue paper base paper to which the oil-based chemical solution is applied in the primary chemical solution application step. A next chemical solution application step;
A method for producing tissue paper, comprising:
The method for producing tissue paper according to claim 1, wherein the oil-based chemical is an emulsion of a substance selected from the group of mineral oil, collagen, liquid paraffin, and fatty acid amide derivatives, or a mixture thereof.
The method for producing tissue paper according to claim 1, wherein the aqueous chemical solution contains 70% by mass or more of polyol.
The method for producing tissue paper according to claim 1, wherein the primary chemical solution application step applies an oil-based chemical solution by a gravure method.
The method for producing tissue paper according to claim 1, wherein the secondary chemical solution applying step applies the aqueous chemical solution by spray coating.