JP7392469B2 - How to make moisturizing tissue paper - Google Patents

Description

This case relates to a method for producing moisturizing tissue paper, which is made by coating base paper with a moisturizing agent.

Techniques have been developed to improve the texture of tissue paper and the like by adding chemicals to the paper. Highly functional products with improved ``feel'' such as ``moistness'' and ``smoothness'' are being developed.
For example, in Patent Document 1, in a lotion tissue paper made of a two-ply sheet and coated with a lotion chemical solution, the basis weight and paper thickness are numerically defined, and the basis weight and paper thickness are measured using a tissue softness measuring device TSA. An invention is described which attempts to improve smoothness, moist feel, softness, volume, firmness, and processability by numerically specifying smoothness TS750, softness TS7, and firmness D. ing.

Japanese Patent Application Publication No. 2018-33751

By the way, Patent Document 1 also aims to improve the "feel on the skin" including "moist feeling", but in recent years, in tissue papers, "moist feeling" is also called "moisturizing feeling" among "feel on the skin". There is a growing desire to improve the "moist feeling" of skin. In the case of moisturizing tissue paper in which a humectant is added to the paper, the humectant contributes to improving the "moist feeling", but there is a need for further technological development to further improve the moist feeling.

The present invention was developed focusing on these issues, and one of the purposes is to provide a method for producing moisturizing tissue paper that can improve the moist feeling. In addition to the present purpose, the present invention also includes functions and effects derived from each configuration shown in "Details for Carrying Out the Invention" that will be described later, which cannot be obtained with conventional techniques. It can be positioned for other purposes.

The method for producing moisturizing tissue paper according to the present invention is a method for producing moisturizing tissue paper to which a humectant is added, and includes a coating process that includes a process of applying a humectant to a base paper produced in a papermaking process, and an aging process of aging the moisturizing base paper coated with the moisturizing agent to absorb the moisturizing agent; and a productizing process of cutting the aged moisturizing base paper into a desired width and folding it into a moisturizing tissue paper. The difference ΔHFab1 (=HFa1 - HFb1) between the hand feel value HFb1 on the surface of the base paper and the hand feel value HFa1 on the surface of the moisturizing tissue paper manufactured in the commercialization process is 3.0 or more. It is characterized by management.

According to the present invention, the moist feeling can be improved.

1 is a flowchart of a method for manufacturing moisturizing tissue paper according to one embodiment. It is a block diagram of the apparatus which performs the coating process of the manufacturing method of the moisturizing tissue paper based on one Embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, embodiments of the moisturizing tissue paper (hereinafter also simply referred to as "tissue paper") and its manufacturing method according to the present invention will be described.

(Manufacturing method and each process of moisturizing tissue paper)
As shown in FIG. 1, the method for manufacturing moisturizing tissue paper according to the present embodiment includes four steps: a paper making step S10, a coating step S20, an aging step S30, and a carton filling step (product production step) S40.
In the papermaking process S10, pulp slurry as a papermaking raw material is made into paper to produce a raw roll.
In the coating step S20, a humectant is applied to the surface of the base paper unwound from the base roll.
In the aging step S30, a roll of base paper coated with a moisturizing agent (moisturizing base paper) is stored in a predetermined storage environment for a predetermined period of time to allow the moisturizing agent to be absorbed into the paper.
In the carton filling step (product production step) S40, the moisturizing base paper unwound from the aged base roll is cut, folded, and filled into a carton to produce a product.
This will be explained in more detail below.

In the papermaking process, a papermaking device (papermaking means) is used to make paper from pulp slurry as a papermaking raw material to produce a plurality of primary rolls.
Pulp components contained in the pulp slurry as a raw material for papermaking include wood pulp, non-wood pulp, and deinked pulp. Examples of wood pulp include hardwood pulp (hardwood kraft pulp (LKP)), softwood pulp (softwood kraft pulp (NKP)), sulfite pulp (SP), dissolving pulp (DP), soda pulp (AP), and unbleached pulp. Examples include chemical pulps such as kraft pulp (UKP) and oxygen bleached kraft pulp (OKP). In addition, examples of wood pulp include semi-chemical pulp such as semi-chemical pulp (SCP) and chemical ground wood pulp (CGP), mechanical pulp such as ground wood pulp (GP), and thermomechanical pulp (TMP, BCTMP). Can be mentioned. Examples of non-wood pulps include cotton-based pulps such as cotton linters and cotton lint, non-wood-based pulps such as hemp, wheat straw, and bagasse, cellulose isolated from ascidians, seaweeds, etc., chitin, and chitosan. . Examples of deinked pulp include pulp obtained by deinking waste paper as a raw material. In addition, for the pulp component, one type of the above-mentioned pulps may be used alone, or two or more types of pulps may be used in combination. As the pulp component, it is preferable to use at least one selected from softwood pulp and hardwood pulp. Among these, as the pulp component, it is preferable to use a softwood pulp and a hardwood pulp in combination, and it is more preferable to use a combination of a softwood kraft pulp (NKP) and a hardwood kraft pulp (LKP).

In this embodiment, the pulp slurry is prepared by preparing a mixture of 70% by mass of softwood bleached kraft pulp (NBKP) and 30% by mass of hardwood bleached kraft pulp (LBKP), and 0.1 part by mass of this mixture is mixed with 99% of water. It was prepared by adding .9 parts by mass. However, the mixing ratio (mass % ratio) of softwood bleached kraft pulp (NBKP) and hardwood bleached kraft pulp (LBKP) can be adjusted in the range of 20:80 to 80:20.

In addition, in this embodiment, the continuous sheet (base paper) wound around the raw fabric roll is obtained by paper-forming the above-mentioned pulp slurry using a two-layer twin wire former, followed by dehydration and drying. It is.
In the drying step in the papermaking process, a Yankee dryer is used, and one side of the wet paper is brought into contact with the surface (peripheral surface) of the roll of the Yankee dryer to dry it.

FIG. 2 shows a configuration diagram of a coating device (coating means) 1 that performs a coating step in the method for producing moisturizing tissue paper according to the present embodiment. The coating device 1 coats _{a continuous sheet W 1 ( one ply} The plying section (plying means) _RP performs a plying process of overlapping tissue paper), and the application part (application means) 2 performs a coating process of applying a moisturizer to the plied continuous sheet. Ru.

In the present embodiment, in the coating process, two primary rolls W _R1 , which have been made into paper in the papermaking process, are moved to the coating area and set in the coating apparatus 1 as shown in FIG. . The continuous sheet W ₁ wound around the primary fabric roll W _R1 has an inner surface (that is, an adhesive surface) F _B that becomes the inner side when plying, and an outer surface F _F that becomes the outer surface.

Then, as shown in FIG. 2, the coating apparatus 1 is configured to coat the inner surface F B of one layer of continuous sheet W 1 that is fed out from the first raw roll W _{R1 a} at a processing speed V _ua by the unwinding reel R _{U1 a.} and the inner surface _FB of one layer of continuous sheet _W1 fed out at processing speed _Vub from the first raw roll _WR1b by the unwinding reel _RU1b , are superimposed in the ply part _RP , and the first A two-layer laminated continuous sheet (two-ply tissue paper) _W2 having _a layer _F1 and a second layer F2 is manufactured.

The inner surface F _B of the one-layer continuous sheet W ₁ is a surface that is dried by contacting the circumferential surface of a Yankee dryer roll (Yankee roll) in the drying step of the papermaking process, and is also referred to as a Yankee surface. In addition, this Yankee surface is dried by contacting the peripheral surface of the Yankee roll, so it is smoother than the back surface (Uramen, non-Yankee surface), which is the opposite surface, and when the product is made, it is on the outside. directed towards. For this reason, the inner surface _FB , which is the Yankee surface, is called the front surface (front surface) in terms of product standards.

Next, as shown in FIG. 2 , the coating device 1 applies a moisturizer to the plied continuous laminated sheet W ₂ in the application section 2 using an offset gravure method. At this time, in the coating section 2 of the coating device 1, a moisturizer is applied to the outer surface F _F (back surface in terms of product standards) of one continuous sheet _W1 of the two layered continuous sheets _W2 . Ru. After applying the humectant, the coating device 1 winds up _the laminated continuous sheet _W2 coated with the humectant using a take-up reel RW to produce a second raw roll _WR2 . Thereafter, the second raw roll W _R2 is cut (divided in the axial direction) into a size that can be covered with an aging cover member, which will be described later. This cut roll is hereinafter referred to as a "first roll (paper roll)."

Note that the outer surface _FF (back surface according to product standards) of the other continuous sheet W ₁ of the two-layer laminated continuous sheet W ₂ is not coated with a humectant, but the laminated continuous sheet W ₂ coated with a humectant At the stage when it has been wound up to become the second raw roll W _R2 , the outer surface _FF (back surface) of the other continuous sheet W ₁ is the outer surface of the one continuous sheet W ₁ coated with the moisturizer. Contact the side surface F _F (back surface). Due to this contact between the outer surfaces _FF , the moisturizer is also quickly supplied to the outer surface _FF of the other continuous sheet _W1 .
Further, in this embodiment, a moisturizer containing 85% by mass of glycerin and 15% by mass of water is used, but the moisturizer is not limited to this.

An advantage of applying a humectant to the back side is that the back side has better smoothness when applied than the front side, so there is less variation in the coating thickness.
Moreover, instead of both sides of the laminated continuous sheet _W2 (i.e., each outer surface _FF of the two continuous sheets _W1 ), one side of the laminated continuous sheet _W2 (i.e., one of the two continuous sheets _W1) An advantage of applying the coating to the outer surface _FF ) is that when applying from one side, the coating liquid for two plies is applied at once, making it easy to control the amount of coating.
Note that the method of supplying the humectant to the base paper is not limited to the application (coating) using the offset gravure method.
Furthermore, the tissue paper may have one ply or three or more plies.
In addition, each base paper of two or more plies of tissue paper shall have the same structure.

Other moisturizing agents include, for example, aloe extract, protractor extract, hypericum extract, barley extract, orange extract, seaweed extract, chamomile extract, cucumber extract, comfrey extract, burdock extract, shiitake extract, rhododendron extract, perilla extract, and sage. Extract, duke extract, cordyceps sinensis extract, dokudami extract, hatakeshimeji extract, loquat extract, grape leaf extract, fuyubodaiju extract, prune extract, loofah extract, botanpi extract, maikai extract, peach extract, lily extract, apple extract, almond oil, olive oil, sesame oil, Safflower oil, dimethyl silicone, silicone oil, modified silicone, soybean oil, camellia oil, castor oil, jojoba oil, mink oil, coconut oil, lanolin, arabinose, galactose, xylose, glucose, sucrose, sorbitol, fructose, maltose, multi Tall, mannose, beeswax, hyaluronic acid, placenta extract, rhamnose, xylobiose, xylo-oligosaccharide, tuberose polysaccharide, trisaccharide, trehalose, soluble collagen, glycyrrhizin, chondroitin sulfate, diglycerin, squalane, ceramide-like compound, triglycerin, urea, Examples include vitamin C phosphate calcium salt, vitamin E, sodium pyrrolidone carboxylate, hinokitiol, liquid paraffin, petrolatum, polyhydric alcohol, and the like. Among these moisturizers, aloe extract, Enmeishou extract, Hypericum perforatum extract, comfrey extract, perilla extract, sage extract, ceramide-like compounds, Dokudami extract, Hatake shimeji extract, loquat extract, Fuyubo daiju extract, botanpi extract, castor oil, jojoba oil , lanolin, hyaluronic acid, placenta extract, rhamnose, xylooligosaccharides, soluble collagen, glycerin, chondroitin sulfate, squalane, urea and polyhydric alcohols. Examples of polyhydric alcohols include ethylene glycol, glycerin, 1,3-butylene glycol, propylene glycol, and the like. Among these, it is preferable that the humectant contains glycerin. For the humectant, one type of the above compounds may be used alone, or two or more types may be used in combination.

In the aging process, the base paper roll coated with a moisturizer is moved to the aging area, placed on a pallet with the roll axis vertical, and stored on the floor or on a shelf in a designated place. Save only for time.
The storage environment (namely, storage temperature and storage humidity) of the aging area is managed using an air conditioner with a humidity adjustment function. It is also preferable to store the raw fabric roll by wrapping it in a film.

The carton filling device (carton filling means) that performs the carton filling process cuts (cuts) the tissue paper pulled out from the first roll after the aging process into a desired width (for example, product width), and cuts the cut tissue paper into a desired width (for example, product width). Fold the paper and fill the folded bundle of tissue paper into a carton. The folding process is performed in equipment including a rotary or multi-stand type interfolder. By filling a carton with tissue paper produced by the tissue paper production method described above, a tissue paper product to which a humectant is added is completed.

(Characteristic values of moisturizing tissue paper)
By the way, in this moisturizing tissue paper, we focused on the hand feel value (HF value), density, and moisturizing agent application amount among the parameters representing the characteristics of tissue paper, and these parameters were used to determine the " It is set to a value that contributes to improving the "moist feeling". This will be explained.

In a 1-ply tissue paper, the surface formed in contact with the Yankee roll is the front surface (also called the omotemen or Yankee surface), and the back surface is the back surface (also called the uramen or non-Yankee surface). do.

The hand feel value and its measuring method will be described later, but the hand feel value generally has a higher value when the surface is smooth. As mentioned above, the base paper of this tissue paper has a smoother texture on the surface that is in contact with the Yankee roll of the Yankee dryer than the back side, so the front side has a higher hand feel value than the back side.
Furthermore, by applying a humectant to the base paper, the hand feel value is increased.

In order to enhance the moist feeling on the surface of this moisturizing tissue paper (moisturizing tissue paper as a product coated with a humectant), the hand feel value HFb1 of the surface of one sheet of base paper before being coated with a humectant and the product The difference ΔHFab1 (=HFa1-HFb1) between the hand feel value HFa1 of the surface of one ply of moisturizing tissue paper of the two plies as a product manufactured in the process is set to be 3.0 or more. This difference ΔHFab1 can be manipulated by, for example, changing the management conditions of the aging process.

It is thought that the higher the hand feel value of the surface, the more moist the surface will feel. However, for example, if a moisturizer is applied to the back side in the coating process as in this embodiment, the hand feel value of the back side containing the humectant will greatly improve immediately after coating, but when no moisturizer is included. The hand feel value of the surface does not improve.

For this reason, during the aging process, a process is performed to blend the moisturizer so that it evenly penetrates the surface. In this aging process, the hand feel value on the back side decreases and the hand feel value on the front side increases.When the moisturizer penetrates evenly to the surface, the hand feel value on the front side of the moisturizing tissue paper as a product increases. Both HFa1 and the back side hand feel value HFa2 are larger than the front side hand feel value HFb1 and the back side hand feel value HFb2 of the original paper. Therefore, the difference ΔHFab1 (=HFa1-HFb1) is set to be 3.0 or more.

As a result, the hand feel value HFa1 of the surface of the moisturizing tissue paper product becomes high, but in this embodiment, the hand feel value HFa1 of the surface of the moisturizing tissue paper product is set to 77 or more. This is because, as mentioned above, the higher the hand feel value of the surface, the more moist the surface will feel. The hand feel value HFa1 of the surface is more preferably 80 or more, still more preferably 82 or more.

Furthermore, when the moisturizer permeates uniformly between the front and back surfaces as well as in the spreading direction of the paper surface, the amount of increase in the hand feel value HFa1 of the surface of the moisturizing tissue paper as a product [i.e., ΔHFab1 (=HFa1 - HFb1)] is , the amount of increase in the back hand feel value HFa2 of the moisturizing tissue paper as a product, that is, ΔHFab2 (=HFa2-HFb2), tends to be larger.

Therefore, in moisturizing tissue paper as a product, the difference ΔHFa12 (=HFa1 - HFa2) between the hand feel value HFa1 on the front side and the hand feel value HFa2 on the back side is the If the difference between the hand feel value HFb1 of the paper and the hand feel value HFb2 of the back side is less than or equal to ΔHFb12 (=HFb1 - HFb2), it can be assumed that the moisturizer is soaked uniformly between the front and back sides as well as in the spreading direction of the paper surface.

Therefore, in the present embodiment, in the moisturizing tissue paper as a product, the difference ΔHFa12 (=HFa1-HFa2) between the hand feel value HFa1 on the front side and the hand feel value HFa2 on the back side is calculated as In the base paper, the difference between the hand feel value HFb1 on the front side and the hand feel value HFb2 on the back side is set to be less than or equal to ΔHFb12 (=HFb1-HFb2). This operation can be performed, for example, by changing the management conditions of the aging process.

In addition, in this embodiment, in the base paper before the moisturizer is applied, the difference ΔHFb12 (=HFb1-HFb2) between the hand feel value HFb1 on the front side of the base paper and the hand feel value HFb2 on the back side of the base paper is 7 to 7. It is set at 17. This difference ΔHFb12 can be manipulated by, for example, changing the conditions of the papermaking process.

Furthermore, in this moisturizing tissue paper, the amount of moisturizer applied is specified to be 3.0 to 5.0 (g/m ² ). The amount of moisturizer applied is the amount of moisturizer applied per unit area of one ply of moisturizing tissue paper. A lower limit of 3.0 (g/m ² ) is specified because the hand feel value HF increases as the amount of moisturizer applied increases. In addition, if the amount of moisturizer applied is too large, there is a risk that the touch sensation may change from a desirable "moist feeling" to an undesirable "sticky feeling" or the paper may become easier to tear. Therefore, an upper limit of 5.0 (g/m ² ) is specified.

In addition, this moisturizing tissue paper has a density of 0.26 (g/ cm ³ ) or less. It is thought that reducing the density gives the paper a fluffy feel and at the same time increases the moist feeling, so the upper limit value of the density is set at 0.26 (g/ cm ³ ). The density of this moisturizing tissue paper is more preferably 0.24 (g/ cm ³ ) or less.

Here, the hand feel value (HF value) and its measurement method will be explained.
The hand feel value (HF value) can be measured by the following measurement method using a tissue softness analyzer (manufactured by Emtec Electronic GmbH).

First, a sample cut into a circle with a diameter of 112.8 (mm) is placed on the sample stage of the tissue softness analyzer. If the sample is a 2-ply product, use the 2-ply as is. When cutting the sample into a circular shape, cut so that the center of the circle is approximately located in the center of the tissue product. A bladed rotor is pressed into this sample from above by applying a pressing pressure of 100 (mN). Thereafter, the bladed rotor is rotated at a rotation speed of 2.0 (rotations/second), and the vibration frequency at that time is measured.
In addition, the amount of vertical deformation displacement when a bladed rotor is pushed into another sample cut into a circle with a diameter of 112.8 (mm) at pressures of 100 (mN) and 600 (mN) is calculated. . The HF value is a value calculated from the vibration frequency and the amount of deformation displacement, and Facial II can be used as the calculation algorithm.

When calculating the HF value, prepare 10 sets of samples for each level. One set of 10 samples is used and the surface is measured once. At this time, the surface refers to the surface facing the outside of the product, and it does not matter which surface faces the outside. In the case of a one-ply product, the side showing the higher HF value is the surface. All 10 sets of samples are measured once, a total of 10 pieces of measurement data are obtained, and the average value is calculated.
Note that the measurement of the sample is performed in an environment compliant with ISO187 (temperature: 23±1° C., relative humidity: 50±2%). Furthermore, during measurement, calibration is performed using a standard sample (Emetec ref.2X (nn.n)) according to the attached instructions, and the algorithm is set to Facial II. The calculation software is emetec measurement system ver. 3.22 is used.

Note that the density can be calculated from the basis weight and paper thickness.
The basis weight can be measured according to the regulations of JIS P8124.
Paper thickness can be measured using a thickness gauge in an environment compliant with ISO187.
Further, the coating amount can be calculated by cutting out the base paper from the roll immediately after coating, measuring the basis weight, and subtracting the basis weight of the base paper before coating from the measured basis weight.

The basis weight of the tissue paper is preferably 10 (g/m ² ) or more, more preferably 13 (g/m ² ) or more, and preferably 15 (g/m ² ) or more. More preferred. Generally, the upper limit of the basis weight of tissue paper is preferably about 22 (g/m ² ), more preferably about 20 (g/m ² ), and about 18 (g/m ² ). It is more preferable that Note that the basis weight of the tissue paper in this embodiment represents the basis weight per sheet (1 ply) of base paper constituting the 2-ply tissue paper.
By setting the basis weight of the tissue paper base paper within the above range, it is possible to maintain practical strength while exhibiting a smooth texture and a fluffy feel.

(action and effect)
The moisturizing tissue paper and the manufacturing method thereof according to the present embodiment are configured as described above, and as described above, the hand feel value HFb1 of the surface of a sheet of base paper before being coated with a moisturizer, and the product By setting the difference ΔHFab1 (=HFa1 - HFb1) between the hand feel value HFa1 of the surface of one ply of moisturizing tissue paper of the two ply as a product manufactured in the chemical process to 3.0 or more, a moist feeling can be achieved. In addition to being able to improve the texture, it also becomes possible to exhibit a smooth texture and a fluffy feel.

EXAMPLES The features of the present invention will be explained in more detail below with reference to Examples and Comparative Examples. The materials, usage amounts, proportions, processing details, processing procedures, etc. shown in the following examples can be changed as appropriate without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be interpreted as being limited by the specific examples shown below.

For the tissue papers of Examples 1 to 4 and Comparative Examples, the base paper webs were manufactured as follows.
First, a pulp slurry was prepared such that out of the pulp components (100% by mass), hardwood kraft pulp (hereinafter referred to as "LBKP") was 70% by mass and softwood kraft pulp (hereinafter referred to as "NBKP") was 30% by mass. Furthermore, the pulp slurry contains 0.1 to 1.0 mass% of softener (mass ratio to pulp components) and 0.1 to 1.0 mass% of wet paper strength agent (mass ratio to pulp components). It was added as follows. The pulp slurry thus prepared was made into paper using a twin wire Yankee machine to obtain a base paper web for tissue paper.
The two obtained base paper webs are placed in a ply machine, and unwound and overlaid into two plies. After overlapping, a moisturizing agent is applied and the webs are re-rolled to obtain a two-ply tissue paper roll. Ta.

(Test method)
(Hand feel value (HF value))
The hand feel value (HF value) was measured by the above-mentioned measurement method using the above-mentioned tissue softness analyzer (manufactured by Emtec Electronic GmbH).

(Basic weight)
The measured value of basis weight indicates the measured value of 1-ply tissue paper. The basis weight was measured according to JIS P8124.

(paper thickness)
Thickness measurements refer to 2-ply tissue paper measurements. The thickness is measured using a thickness gauge (Universal Micrometer (Xill) (based on ISO 12625-3)) in an environment compliant with ISO 187, when the measuring tip is lowered at a speed of 2 (mm) per second. I read the value. In addition, the measurement was performed by measuring 10 sets of 2-ply tissue paper one set at a time, and the average thickness of the obtained 10 sets was taken as the paper thickness.

(density)
The density was determined by dividing the basis weight by the paper thickness. However, the basis weight and paper thickness used in the calculation are those with the same number of plies.

(Tensile strength)
The tensile strength measurements are for two-ply tissue paper and indicate dry tensile strength. The tensile strength was measured according to JIS P 8113. The tensile strength in the longitudinal direction and the tensile strength in the transverse direction were measured for 10 samples each, and the average value was calculated to determine the tensile strength.

(sensory evaluation)
The "moist feeling" was evaluated on a 5-point scale by 10 evaluators. The "moist feeling" was evaluated by applying tissue paper to the skin.
The evaluation results were expressed on a five-point scale from 1 to 5 below.
<Moist feeling>
5: Very good 4: Better 3: Excellent 2: Somewhat good 1: Somewhat inferior

Table 1 below shows each measurement value of Examples 1, 2, 3, and 4 and Comparative Example 1.

All of the moisturizing tissue papers of Examples 1 to 4 have a difference ΔHFab1 (=HFa1-HFb1) between the hand feel value HFb1 on the surface of the base paper and the hand feel value HFa1 on the surface of the moisturizing tissue paper manufactured in the commercialization process. is 3.0 or more. On the other hand, the difference ΔHFab1 of the moisturizing tissue paper of the comparative example is less than 3.0.

The difference ΔHFb12 (=HFb1 - HFb2) between the hand feel value HFb1 on the front side and the hand feel value HFb2 on the back side of the base paper used for the moisturizing tissue paper, which is the product of Examples 1, 2, 4 and the comparative example, is , 7-17.

In both the moisturizing tissue paper products of Examples 1 and 2 and the comparative example, the difference ΔHFa12 (=HFa1-HFa2) between the hand feel value HFa1 on the front side of the moisturizing tissue paper and the hand feel value HFa2 on the back side is The difference between the hand feel value HFb1 on the front side of the base paper and the hand feel value HFb2 on the back side of the base paper is less than or equal to ΔHFb12 (=HFb1−HFb2).

Furthermore, the surface hand feel value HFa1 of all of the moisturizing tissue paper products of Examples 1 to 4 is 80 or more, which is greater than 77.
Furthermore, the moisturizing tissue paper products of Examples 1 to 4 and Comparative Examples all have a density of 0.26 (g/ cm ³ ) or less; is less than 0.24 (g/ cm ³ ), which is smaller than 0.26 (g/ cm ³ ).

The moisturizing tissue paper of Example 2 has a moist feeling with the highest evaluation value of 5, the moisturizing tissue paper of Example 1 has the next highest evaluation value of 4, and the moisturizing tissue paper of Example 4 has a moist feeling. The paper has a moist feeling with an evaluation value of 3, which is the next highest, and the moisturizing tissue paper of Example 3 has a moist feeling with an evaluation value of 2, which is the next highest. The moist feeling of the moisturizing tissue paper of the comparative example has an evaluation value of 1 (slightly inferior).
Therefore, it was possible to confirm that the "moist feeling" was improved in accordance with the value of the difference ΔHFab1, the value of the difference ΔHFbb12, the value of the surface hand feel value HFa1, and each parameter value of density.

(others)
Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, etc., and can be modified and modified as appropriate without departing from the technical idea of the present invention.

For example, the moisturizing tissue paper according to the above embodiment is a two-ply tissue paper, but the present invention is not limited to this, and one-ply tissue paper, three-ply tissue paper or more can also be applied.
In the above embodiment, the moisturizer is applied to the back side of the base paper, but the moisturizer is not limited to this, and the moisturizer may be applied to the front surface of the base paper, or the moisturizer may be applied to both sides of the base paper.
In the above embodiment, aging is performed by covering the roll with a water-impermeable member, which promotes shortening of the aging time and suppresses volatilization of the humectant. However, the roll is covered with a water-impermeable member. Aging may be performed without any aging.

S10 Paper making process S20 Coating process S30 Aging process S40 Carton filling process (product production process)
W _R1a , W _R1b primary fabric roll W _R2 secondary fabric roll R _U1a , R _U1b unwinding reel R _W take-up reel R _P ply section V _Ua , V _Ub processing speed W ₁ continuous sheet W ₂ laminated Continuous sheet F Outer surface of _F laminated continuous sheet F Inner surface of _B laminated continuous sheet F ₁ First layer sheet F ₂ Second layer sheet

Claims (5)

A method for producing moisturizing tissue paper to which a moisturizing agent is added,
a coating process including a process of applying the moisturizer to base paper produced in the papermaking process;
an aging step of aging the moisturizing base paper coated with the moisturizing agent so that the moisturizing agent is absorbed and penetrated;
A product production step of cutting the aged moisturizing base paper into a desired width and folding it into a moisturizing tissue paper,
Manage so that the difference ΔHFab1 (=HFa1-HFb1) between the hand feel value HFb1 on the surface of the base paper and the hand feel value HFa1 on the surface of the moisturizing tissue paper manufactured in the commercialization process is 3.0 or more. A method for producing moisturizing tissue paper, characterized by: The method according to claim 1, characterized in that a difference ΔHFb12 (=HFb1-HFb2) between the hand feel value HFb1 on the front side of the base paper and the hand feel value HFb2 on the back side of the base paper is 7 to 17. Method for manufacturing moisturizing tissue paper. The difference ΔHFa12 (=HFa1-HFa2) between the hand feel value HFa1 on the front side of the moisturizing tissue paper and the hand feel value HFa2 on the back side of the moisturizing tissue paper is expressed as the hand feel value HFb1 on the front side of the base paper and the hand feel value HFa2 on the back side of the base paper. The method for producing moisturizing tissue paper according to claim 1 or 2, characterized in that the difference from the hand feel value HFb2 of the back side is equal to or less than ΔHFb12 (=HFb1-HFb2). The method for producing moisturizing tissue paper according to any one of claims 1 to 3, wherein the hand feel value HFa1 of the surface of the moisturizing tissue paper is 77 or more. The method for producing moisturizing tissue paper according to any one of claims 1 to 4, wherein the density of the moisturizing tissue paper is 0.26 (g/cm ³ ) or less .

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