JP2017196272A - Toilet paper and toilet roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide toilet paper having favorable texture and, when being formed into a roll form, capable of exerting excellent hand feeling.SOLUTION: A toilet paper 1 according to the present invention is 2-ply or more toilet paper having outer-wind toilet paper 12 and inner-wind toilet paper 14. The 2-ply or more toilet paper is characterized in that the embossment height of the outer-wind toilet paper is not less than 90 μm and not more than 210 μm, the embossment height of the inner-wind toilet paper is not less than 70 μm and not more than 170 μm, and a difference in the embossment heights between the outer-wind toilet paper and the inner-wind toilet paper is not less than 10 μm and not more than 50 μm.SELECTED DRAWING: Figure 1

Description

  The present invention relates to toilet paper and a toilet roll.

  Toilet paper products are manufactured by cutting toilet paper obtained by stacking one or more toilet paper webs into a predetermined size. In general, a toilet roll (rolled toilet paper) obtained by winding a long toilet paper into a roll is frequently used. Toilet paper composed of a single toilet paper web is referred to as 1-ply toilet paper, and toilet paper composed of a double-layer toilet paper web is referred to as 2-ply toilet paper.

  Toilet paper directly touches the skin, so a smooth and plump texture is required. In addition, since toilet paper is distributed in roll form and lined up in stores, there are cases where a touch feeling and a soft touch feeling of the toilet roll itself are required. That is, when a toilet roll is grabbed, a person who feels a soft and soft touch tends to be evaluated as high-quality or high quality. For this reason, improving the touch feeling and touch feeling of a toilet roll, such as adjusting the winding density of a toilet roll, is examined (for example, patent documents 1 and 2).

Japanese Patent No. 3619808 Japanese Patent No. 3992943

  However, in the conventional toilet roll, the smooth and fluffy texture of the toilet paper unwound from the roll and the touch and soft touch of the toilet roll itself are not compatible at a high level. There was a need for improvement.

  Therefore, in order to solve the problems of the prior art, the present inventors provide a toilet paper having a good touch feeling and capable of exhibiting an excellent touch feeling when it is in a roll form. We proceeded with the study for the purpose of doing this.

As a result of intensive studies to solve the above problems, the present inventors formed embosses with different heights on the outer roll toilet paper and the roll inner toilet paper, and set the difference in the emboss height to a predetermined level. It was found that by setting the range, a toilet paper having a good touch feeling and a toilet paper capable of exhibiting an excellent touch feeling when formed into a roll form was obtained.
Specifically, the present invention has the following configuration.

[1] Two-ply or more toilet paper having an outer roll toilet paper and an inner roll toilet paper, the emboss height of the roll outer toilet paper being 90 μm or more and 210 μm or less, and the emboss height of the roll inner toilet paper Is 70 μm or more and 170 μm or less, and the difference between the embossing height of the outer toilet paper and the embossing height of the inner toilet paper is 10 μm or more and 50 μm or less.
[2] The compression recovery rate (RC ₁ ) of the outer roll toilet paper is 33% or more and 53% or less, and the compression recovery rate (RC ₂ ) of the roll inner toilet paper is 35% or more and 55% or less (RC ₁ -RC ₂ value is less than -1% -12% or more) according to [1] toilet paper.
[3] The toilet paper according to [1] or [2], wherein the embossing pattern of the outer toilet paper and the embossing pattern of the inner toilet paper are different.
[4] The emboss density of the outer roll toilet paper is 10 pieces / cm ² or more and 30 pieces / cm ² or less, and the emboss density of the roll inner toilet paper is 20 pieces / cm ² or more and 100 pieces / cm ² or less. ] Toilet paper according to any one of [3] to [3] A toilet roll in which the toilet paper according to any one of [1] to [4] is rolled, and the roll length of the toilet roll is 25 m A toilet roll of 2 plies or more having a roll density of 0.50 m / cm ² or more and 1.4 m / cm ² or less.
[6] The embossing process of embossing height of 90 μm to 210 μm is performed on the outer toilet paper (A), and the embossing process of embossing height of 70 μm to 170 μm is performed on the inner toilet paper (B). A roll outer toilet paper obtained in the step (A), and a step of laminating the outer roll toilet paper obtained in the step (A) and the step of laminating the roll inner toilet paper obtained in the step (B). The manufacturing method of the toilet paper of 2 plies or more whose difference of the embossing height of this and the embossing height of the roll inner side toilet paper obtained at the (B) process is 10 micrometers or more and 50 micrometers or less.

  ADVANTAGE OF THE INVENTION According to this invention, it is a toilet paper which has a favorable touch feeling, Comprising: When the roll form is used, the toilet paper which can exhibit the outstanding touch feeling can be obtained. The toilet roll composed of the toilet paper of the present invention has a soft touch and can give a favorable impression such as a high-class feeling and a high-quality feeling.

FIG. 1 is a schematic diagram illustrating the configuration of the toilet paper of the present invention. FIG. 2 is a pattern diagram for explaining the emboss pattern A. FIG. FIG. 3 is a pattern diagram illustrating the emboss pattern B. FIG. FIG. 4 is a diagram for explaining a method of calculating the winding density of the toilet roll.

  Hereinafter, the present invention will be described in detail. The description of the constituent elements described below may be made based on representative embodiments and specific examples, but the present invention is not limited to such embodiments.

(Toilet Paper)
The present invention relates to a toilet paper of two or more plies having an outer roll toilet paper and an inner roll toilet paper. Here, the embossed height of the roll-out side toilet paper is 90 μm or more and 210 μm or less. The embossed height of the roll-inside toilet paper is 70 μm or more and 170 μm or less. Moreover, the difference between the embossed height of the outer toilet paper and the embossed height of the inner toilet paper is 10 μm or more and 50 μm or less.

  Since the toilet paper of this invention has the said structure, it is excellent in the touch feeling at the time of use. Specifically, the toilet paper of the present invention has a smooth and plump texture. Furthermore, the toilet paper of the present invention can exhibit an excellent touch feeling when it is in a roll form. That is, the toilet roll comprised from the toilet paper of this invention has softness in the roll itself, and is excellent in a touch feeling.

  The toilet paper of the present invention is a toilet paper of 2 plies or more. The number of toilet paper plies means the number of toilet paper webs stacked. The number of plies may be two or more, preferably 2 or more, 4 or less, more preferably 2 or 3, and particularly preferably 2.

In this invention, it is preferable that toilet paper is the toilet paper which comprises a toilet roll. That is, the toilet paper of the present invention has a roll-out toilet paper and a roll-in toilet paper. The roll-out toilet paper is toilet paper that is arranged on the outer peripheral surface side of the roll when the toilet paper is rolled up. The roll-inside toilet paper is a surface that is disposed on the inner peripheral surface side of the roll when the toilet paper is wound into a roll.
FIG. 1 is a diagram illustrating the configuration of the toilet paper of the present invention. FIG. 1 shows an enlarged view of a toilet roll and a dotted line circle portion of toilet paper constituting the toilet roll. As shown in FIG. 1, the toilet paper 1 has a roll-out toilet paper 12 on the outer peripheral surface side of the toilet roll 100, and a roll-in toilet paper 14 on the inner peripheral surface side of the toilet roll 100. doing. In addition, when the toilet paper is a toilet paper of 3 plies or more, the toilet paper disposed on the outermost peripheral side is referred to as the outer side toilet paper, and the toilet paper disposed on the innermost side is referred to as the inner side toilet paper. That's it.

  The embossed height of the roll-out toilet paper is 90 μm or more and 210 μm or less. The embossed height of the roll-out toilet paper is preferably 100 μm or more, more preferably 130 μm or more, and further preferably 190 μm or more. The embossed height of the roll-out toilet paper is preferably 210 μm or less, and preferably 200 μm or less. In this invention, the touch feeling at the time of use can be improved by making the embossing height of the roll-out side toilet paper into the said range.

  The embossed height of the roll-inside toilet paper is 70 μm or more and 170 μm or less. The embossed height of the roll-inside toilet paper is preferably 75 μm or more, more preferably 90 μm or more, further preferably 110 μm or more, and particularly preferably 150 μm or more. The embossed height of the roll-inside toilet paper is preferably 170 μm or less, and more preferably 160 μm or less.

The difference between the embossed height of the outer toilet paper and the embossed height of the inner toilet paper is 10 μm or more and 50 μm or less. The difference in the embossed height is preferably 12 μm or more, more preferably 19 μm or more, further preferably 20 μm or more, further preferably 30 μm or more, and particularly preferably 42 μm or more. preferable. Moreover, it is preferable that the difference of emboss height is 50 micrometers or less.
In the present invention, the embossed height of the outer toilet paper and the embossed height of the inner toilet paper are within the above range, and the difference between the embossed height of the outer toilet paper and the inner toilet paper is the difference between the above. By making it within the range, it was successful in achieving both a smooth and fluffy texture of toilet paper and a good touch feeling of the toilet roll.
Such an effect is considered to be obtained by laminating toilet papers at appropriate intervals when a toilet roll is formed by forming embosses having different heights on each toilet paper. That is, it is considered that a soft toilet roll excellent in compressibility can be obtained because an appropriate gap is generated between the laminated toilet papers.

  When measuring the embossed height of each toilet paper, first, using the high precision shape measurement system KS-1100 (manufactured by KEYENCE), the height of the surface (inner side surface) of the outer toilet paper and the inner toilet paper. Get the data. The acquisition range is 1 cm square, and the image acquisition pitch is 10 μm. Next, the acquired image data is read into image analysis software IOMate 2007 (manufactured by I-Spec Co., Ltd.), and the obtained height data is classified into 256 gradations. After removing data of defective parts such as holes, a graph is created with the horizontal axis representing gradation and the vertical axis representing the number of data. For the created graph, take a moving average with a total of 5 points (front and back), redraw the graph, and calculate the slope of the graph at each point of the newly redrawn graph. Calculate using the value. With respect to the obtained slope data, a moving average is taken at a total of 7 points (front and rear), and another graph is created with the horizontal axis representing gradation and the vertical axis representing the slope after moving average acquisition. The position of the inflection point that first reaches the portion after the lowest point of the obtained slope graph is visually determined, and the gradation of the horizontal axis at that position is determined as a threshold value. Next, a weighted average of the height data is performed on the portion below the predetermined threshold, and the obtained average value is set as “average height of the non-embossed portion”. In addition, a weighted average of height data is also performed for a portion that is equal to or greater than a predetermined threshold, and the obtained average value is defined as “average height of embossed portion”. A value obtained by “average height of embossed portion” − “average height of non-embossed portion” is determined as the embossed height, and is calculated for each ply.

The basis weight of the toilet paper is preferably 10 g / m ² or more, more preferably 12 g / m ² or more, and further preferably 15 g / m ² or more. Generally, the upper limit of the basis weight of toilet paper is about 25 g / m ² . In addition, the basic weight of the toilet paper in this specification represents the basic weight per sheet which comprises 2-ply toilet paper. It is preferable that both the outer roll toilet paper and the roll inner toilet paper are within the above ranges.

The thickness of each of the outer roll toilet paper and the roll inner toilet paper is preferably 50 μm or more, more preferably 60 μm or more, and even more preferably 70 μm or more. Moreover, it is preferable that the thickness of each toilet paper is 100 micrometers or less. It is preferable that both the outer roll toilet paper and the roll inner toilet paper are within the above ranges.
In the present invention, by setting the basis weight and thickness of the toilet paper within the above ranges, a smooth texture and a plump tactile sensation can be exhibited while maintaining practical strength.

If the thickness at the time of applying a pressure of 0.5 gf / cm ² in each of Makisotogawa toilet paper and the take-inner toilet paper was T _0, T ₀ of Makisotogawa toilet paper, not less than 0.20mm Preferably, it is 0.45 mm or less.
Further, T ₀ of the roll-inside toilet paper is preferably 0.10 mm or more, and preferably 0.40 mm or less.

Moreover, the difference between the T ₀ of Makisotogawa toilet paper T ₀ and the winding inner toilet paper is preferably greater than 0.01 mm, more preferably at least 0.02 mm, not less than 0.03mm More preferably, it is particularly preferably 0.04 mm or more. In toilet paper of the present invention is characterized also in that the difference between the T ₀ of T ₀ and the winding inner toilet paper Makisotogawa toilet paper is large. Such a difference in T ₀ is considered to contribute to both the smooth and fluffy texture of the toilet paper and the good touch feeling of the toilet roll.

When the thickness when the pressure of 50 gf / cm ² is applied to the toilet paper of the present invention is defined as T _m , each T _m of the outer toilet paper and the inner toilet paper is preferably 0.05 mm or more. More preferably, it is 0.10 mm or more. Further, each of the T _m of Makisotogawa toilet paper and the take-inner toilet paper is preferably less 0.30 mm.

Here, the values of T ₀ and T _m described above can be measured using a KES FB3-AUTO-A automated compression tester (manufactured by Kato Tech Co., Ltd.). Specifically, a sample cut to a size of 10 cm × 20 cm is installed between the 2 cm ² pressure plate and the pressure plate of the KES FB3-AUTO-A automated compression tester, and the pressure plate is set at a speed of 50 seconds / mm. , And the pressure changing at that time and the thickness of the sample at that time are measured. T ₀ is the thickness (mm) of the sample when the pressure is 0.5 gf / cm ² , and T _m is the thickness (mm) of the sample when the pressure is 50 gf / cm ² . The values of T ₀ and T _m are measured 10 times with the concave surface of the emboss (the surface on which the embossing roll is pressed) as the pressure plate side, and abnormal values are excluded from the obtained measurement data by the Hampel identifier method. It is a value calculated as a value. The sample is measured in an environment compliant with ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%).

  Moreover, compression hardness (LC), compression energy (WC), and compression recovery rate (RC) can also be calculated using a KES FB3-AUTO-A automated compression tester (manufactured by Kato Tech Co., Ltd.). The compression hardness (LC) represents the linear proportionality of the repulsive force with respect to the indentation depth, and the larger the value, the harder the compression and the more repulsive. The compression energy (WC) represents the energy required at the time of compression, and indicates that if the value is large, the compression is easy. Further, the compression recovery rate (RC) indicates the recoverability when returning from the compressed state to the original state, and the closer to 100%, the more recoverable.

  The compression strength (LC) of the roll-out toilet paper is preferably 0.40 or more and 0.80 or less. The compression hardness (LC) of the roll-inside toilet paper is preferably 0.30 or more and 0.70 or less. The difference between the compression strength (LC) of the outer roll toilet paper and the compression hardness (LC) of the roll inner toilet paper is preferably 0.02 or more, more preferably 0.03 or more, and 0.04. More preferably, it is the above.

The compressive energy (WC) of the roll-out toilet paper is preferably 0.10 gf · cm / cm ² or more and 0.50 gf · cm / cm ² or less. The compression energy (WC) of the roll-inside toilet paper is preferably 0.10 gf · cm / cm ² or more and 0.40 gf · cm / cm ² or less. And Makisotogawa toilet paper compression energy (WC), the difference in compression energy (WC) of the winding inside toilet paper, is preferably 0.02gf · cm / cm ² or more, 0.03gf · cm / cm ² or more It is more preferable that it is 0.05 gf · cm / cm ² or more.

The compression recovery rate (RC ₁ ) of the outer roll toilet paper is preferably 33% or more and 53% or less. The compression recovery rate (RC ₂ ) of the roll-inside toilet paper is preferably 35% or more and 55% or less. The difference (RC ₁ −RC ₂ ) between the compression recovery rate (RC ₁ ) of the outer toilet paper and the compression recovery rate (RC ₂ ) of the inner toilet paper is more preferably −12% to −1%. preferable.

  The average of the hand feel value (HF value) of the exposed side surface of the toilet paper on the outer side of the toilet paper of the present invention and the hand feel value of the exposed side surface of the inner side toilet paper is preferably 75.0 or more, 78 More preferably, it is 0.0 or more. In addition, although the upper limit of HF value is not specifically limited, Generally it is preferable that it is 95.0 or less.

Here, 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 having a diameter of 112.8 mm is placed on a sample stage of a tissue softness analyzer. A bladed rotor is pushed into the sample from above with a pushing pressure of 100 mN. Thereafter, the bladed rotor is rotated so that the rotation speed becomes 2.0 rotations / second, and the vibration frequency at that time is measured.
Moreover, the amount of deformation displacement in the vertical direction when a bladed rotor is pushed in with a pressure of 100 mN and 60 mN is calculated for another sample cut into a circle having a diameter of 112.8 mm. The HF value is a value calculated from the vibration frequency and the deformation displacement amount, and TP II can be used as a calculation algorithm.
When calculating the HF value, the exposed side surface of the outer roll toilet paper and the exposed surface of the roll inner toilet paper are each measured 10 times, and abnormal values are excluded from the obtained measurement data by the Hampel identifier method. . And the average value of the HF value of toilet paper is calculated from the average value of the HF value of each surface.
The sample is measured in an environment compliant with ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%). In the measurement, calibration is performed with a standard sample (emetec ref. 2X (nn.n)) according to the attached instruction, and the algorithm is set to TP II. As calculation software, emetec measurement system ver. Use 3.22.

The tensile strength in the length direction of each of the outer roll toilet paper and the roll inner toilet paper is preferably 0.90 N / 15 mm or more, and more preferably 1.00 N / 15 mm or more. Moreover, it is preferable that the tensile strength of the length direction of each toilet paper is 1.60 N / 15mm or less, and it is more preferable that it is 1.55 N / 15mm or less.
The tensile strength in the width direction of each toilet paper is preferably 0.20 N / 15 mm or more, and more preferably 0.30 N / 15 mm or more. Moreover, the tensile strength in the width direction of each toilet paper is preferably 0.70 N / 15 mm or less, more preferably 0.60 N / 15 mm or less, and further preferably 0.50 N / 15 mm or less.
In addition, it is preferable that both the outer roll toilet paper and the roll inner toilet paper are within the above range.

  The measurement of the tensile strength of each toilet paper can be performed using a horizontal tensile tester (manufactured by Kumagaya Riki Co., Ltd.). In this case, a sample having a width of 15 mm is used, and measurement is performed under the condition of a tensile speed of 50 mm / min. The tensile strength in this specification is the tensile strength of 1-ply toilet paper, and is an average value of 6 samples. The tensile strength is measured in an environment compliant with ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%).

In the present invention, it is preferable that the embossing pattern of the outer toilet paper is different from the embossing pattern of the inner toilet paper.
In the embossing pattern of the roll-out toilet paper, the emboss diameter of one piece is preferably 0.5 mm or more and 2 mm or less, and more preferably 0.7 mm or more and 1.3 mm or more. The emboss density is preferably 10 pieces / cm ² or more and 30 pieces / cm ² or less, more preferably 15 pieces / cm ² or more and 25 pieces / cm ² or less.
In the embossing pattern of the roll-inside toilet paper, one emboss diameter is preferably 0.2 mm or more and 1.0 mm or less, and more preferably 0.3 mm or more and 0.6 mm or less. The emboss density is preferably 20 / cm ² or more and 100 / cm ² or less, and more preferably 40 / cm ² or more and 80 / cm ² or less.
The difference in emboss diameter between the outer roll toilet paper and the roll inner toilet paper is preferably 0.2 mm or more, and more preferably 0.4 mm or more.

  As an example of the embossing pattern of the roll-out side toilet paper, for example, an embossing pattern as shown in FIG. 2 can be cited. Moreover, as an example of the embossing pattern of a roll inner side toilet paper, an embossing pattern as described in FIG. 3 can be mentioned, for example.

(Textile raw material)
The toilet paper of the present invention is obtained by papermaking a slurry containing a fiber raw material. As the fiber raw material, it is preferable to use pulp. Examples of the pulp 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), dissolved pulp (DP), soda pulp (AP), unbleached craft Examples thereof include chemical pulp such as pulp (UKP) and oxygen bleached kraft pulp (OKP). Further, semi-chemical pulps such as semi-chemical pulp (SCP) and chemiground wood pulp (CGP), mechanical pulps such as ground wood pulp (GP), and thermomechanical pulp (TMP, BCTMP) are exemplified, but not limited thereto. Non-wood pulp includes cotton pulp such as cotton linter and cotton lint, non-wood pulp such as hemp, straw and bagasse, cellulose isolated from sea squirts and seaweed, chitin, chitosan, etc., but is not particularly limited. . The deinking pulp includes deinking pulp made from waste paper, but is not particularly limited. The pulp may be used alone or in combination of two or more.

  As the fiber raw material, it is preferable to use at least one selected from softwood pulp and hardwood pulp, and it is preferable to use softwood pulp. Especially, in this invention, it is preferable to use a conifer pulp and a hardwood pulp together, and it is more preferable to use a softwood kraft pulp (NKP) and a hardwood kraft pulp (LKP) together.

  When softwood pulp is used as the fiber raw material, the content of softwood pulp is preferably 20% by mass or more, and preferably 30% by mass or more, based on the total mass of pulp components contained in the toilet paper. More preferably, it is more preferably 40% by mass or more. Moreover, it is preferable that content of softwood pulp is 80 mass% or less with respect to the total mass of the pulp component contained in toilet paper. By setting the content of softwood pulp within the above range, it becomes easy to set the HF value, compressibility, and the like of toilet paper within a desired range.

  As a fiber raw material, it is preferable to use coniferous pulp and hardwood pulp in combination. That is, it is preferable that the toilet paper further includes hardwood pulp in addition to the softwood pulp. The content of hardwood pulp is preferably 10% by mass or more, more preferably 20% by mass or more, and more preferably 30% by mass or more with respect to the total mass of the pulp components contained in the toilet paper. Further preferred. Moreover, it is preferable that content of hardwood pulp is 70 mass% or less with respect to the total mass of the pulp component contained in toilet paper. By setting the hardwood pulp content within the above range, it becomes easy to make the HF value, compressibility, etc. of the toilet paper within a desired range.

The length-weighted average fiber length of the softwood pulp used as the fiber raw material is preferably 1.6 mm or more, more preferably 1.8 mm or more, and further preferably 2.0 mm or more. Moreover, it is preferable that the length weighted average fiber length of coniferous pulp is 2.5 mm or less.
The length-weighted average fiber length of the hardwood pulp used as the fiber raw material is preferably 0.5 mm or more, more preferably 0.6 mm or more, and further preferably 0.65 mm or more. Moreover, it is preferable that the length weighted average fiber length of hardwood pulp is 1.0 mm or less.
By making the length weighted average fiber length of the fiber raw material within the above range, it becomes easy to make the HF value, compressibility, etc. of the toilet paper within a desired range. In addition, the length weighted average fiber length of the fiber raw material is a fiber length as a raw material, and is a fiber length before performing a beating process or the like.

  The freeness represented by the Canadian Freeness Standard (CFS) of the fiber component (pulp component) contained in the toilet paper is preferably 400 ml or more, more preferably 450 ml or more, 500 ml More preferably, it is the above. The freeness is preferably 700 ml or less. By making the freeness of the fiber component within the above range, it becomes easy to make the HF value, compressibility, etc. of the toilet paper within the desired range, and a toilet paper that achieves both a smooth texture and a plump feel is obtained. It is done. The freeness of the fiber component can be adjusted by controlling the beating conditions as will be described later.

(Optional component)
The toilet paper of the present invention may contain an optional component in addition to the fiber raw material. Examples of the optional component include a dry paper strength agent, a wet strength paper strength agent, and a softening agent. Examples of the dry paper strength agent include cationized starch, polyacrylamide (PAM), carboxymethyl cellulose (CMC), and the like. Examples of the wet paper strength agent include polyamide epichlorohydrin, urea, melamine, and heat crosslinkable polyacrylamide. Examples of the softening agent include anionic surfactants, nonionic surfactants, and cationic surfactants. The above optional components may be used alone or in combination of two or more.

When the toilet paper contains a dry paper strength agent, the content of the dry paper strength agent is 0.01 parts by mass or more and 0.50 parts by mass with respect to 100 parts by mass of the fiber component contained in the toilet paper. The following is preferable.
When the wet paper strength agent is contained in the toilet paper, the content of the wet paper strength agent is 0.001 part by mass or more and 0.10 parts by mass with respect to 100 parts by mass of the fiber component contained in the toilet paper. The following is preferable.
Moreover, when the softener is contained in the toilet paper, the content of the softener is 0.01 parts by mass or more and 0.50 parts by mass or less with respect to 100 parts by mass of the fiber component contained in the toilet paper. Preferably there is.

(Method of manufacturing toilet paper)
The method for producing the toilet paper of the present invention includes a step of making a slurry containing a fiber raw material to obtain a 1-ply toilet paper web, and a step of laminating a 1-ply toilet paper web (hereinafter also referred to as a bonding step); , Embossing the outer roll toilet paper web and the inner roll toilet paper web, and the step of laminating the roll outer toilet paper and the roll inner toilet paper again.

  Prior to the step of obtaining a one-ply toilet paper web, a step of bleaching the fiber material may be included. Examples of the bleaching agent used in the bleaching step include known bleaching agents such as oxygen bleaching agents and chlorine bleaching agents.

  The step of obtaining a one-ply toilet paper web includes the step of obtaining a slurry containing fiber raw materials. The step of obtaining the slurry preferably includes a step of beating the fiber raw material. In the beating process, for example, a beating process can be performed using a double disc refiner or the like. At this time, the softwood pulp and the hardwood pulp may be beaten individually, or may be beaten after being mixed.

  The step of obtaining a one-ply toilet paper web includes a step of papermaking a slurry containing a fiber raw material. Examples of paper machines used in the paper making process include, for example, suction breast formers (circular type, long net type), twin wire formers, circular net formers (C wrap, S wrap), and crescent formers. Can be mentioned.

  In the paper making process, a slurry containing fiber raw material is supplied onto a net-like wire to form a thin layer of pulp. Thereafter, while being transported toward the press part, the moisture of the thin layer of the pulp is drained under the net so that the thin layer of the pulp is dehydrated. Such a process is sometimes called a dehydration process. Generally, a wire is a ring made of a metal or plastic net.

  In the paper making process, for example, a method of forming wet paper as a uniform layer by making a pulp slurry mixed with softwood and hardwood pulp, or combining softwood and hardwood pulp layers together There is a method of forming the wet paper, but any method may be adopted.

  After the dehydration process, the wet paper moves from the wire to the felt. The wet paper is further squeezed mechanically by applying pressure with a press roll through the felt. This may be called a press process or a water extraction process.

  The paper making process preferably further includes a drying process after the water squeezing process. The drying step is preferably, for example, a step of blowing hot air toward the wet paper, or a step of pressure bonding the dryer cylinder to the outer peripheral surface.

  In the paper making step, it is preferable to provide a step of applying a crepe after the drying step. The crepe can be applied by causing the base paper to collide with the doctor blade and compressing in the paper flow direction. Moreover, a predetermined crepe rate can be achieved by providing a speed difference between the take-up reel and the dryer cylinder.

  A base paper winding step may be provided after the crepe application step. In the base paper winding process, the toilet paper web (thin paper) finished through the above-described steps is wound to obtain a one-ply base paper winding. At this time, it is preferable to wind up the toilet paper web (thin paper) so that the surface crimped to the dryer cylinder becomes the outer peripheral surface of the base paper winding.

  The process of laminating a 1-ply toilet paper web includes a process of unwinding and unwinding two base paper rolls on a ply machine and laminating the two base papers. In addition, the process of carrying out a calendar process after bonding may be provided.

  The embossing step includes embossing the embossing height of 90 μm to 210 μm on the outer toilet paper (A) and embossing the embossing height of 90 μm to 170 μm on the inner toilet paper. (B) process to include. The difference between the embossing height of the outer toilet paper obtained in the step (A) and the embossing height of the inner toilet paper obtained in the step (B) is 10 μm or more and 50 μm or less.

Embossing is performed by passing a toilet paper web between an embossing roll and a rubber roll on which convex structures constituting the embossing pattern are installed, and embossing the embossing pattern. By changing the embossing height, pushing amount, and pushing pressure of the embossing roll, an embossed shape having an embossing height in the above range can be formed.
Here, it is preferable that a convex structure having a convex structure height of 0.75 mm or more and 0.85 mm or less is installed on the embossing roll used for embossing the outer roll toilet paper. Moreover, it is preferable that the embossing roll used for the embossing of the roll-out side toilet paper has a convex structure with a convex structure density (emboss density) of 10 / cm ² or more and 30 / cm ² or less. Then, the embossing of Makisotogawa toilet paper, it is preferable to emboss the emboss roll 8 kgf / cm ² or more 20 kgf / cm ² or less pressure.
Further, it is preferable that a convex structure having a convex structure height of 0.70 mm or more and 0.80 mm or less is installed on the embossing roll used for embossing of the inner toilet paper. Moreover, it is preferable that the embossing roll used for the embossing of the roll-inside toilet paper is provided with a convex structure having a convex structure density (emboss density) of 50 / cm ² or more and 70 / cm ² or less. Then, the embossing of the winding inside toilet paper, it is preferable to emboss the emboss roll 5 gf / cm ² or more 15 kgf / cm ² or less pressure.

  The embossing step includes a step of laminating the outer roll toilet paper and the roll inner toilet paper again. In this case, it is preferable to perform the bonding so that the convex surface of the emboss (the surface opposite to the surface on which the embossing roll is pressed) faces each other on the inside.

  In the bonding step, two or more 1-ply toilet paper webs are stacked and bonded. In this step, for example, after the base papers are stacked, they can be bonded together by applying a narrow contact emboss to a portion that becomes an end portion of the product. In that case, it is preferable from the viewpoint of a feeling of touching that the surface pushed in by the embossing roll is outside.

A winding process is further provided after the bonding process. In this winding process, winding for a predetermined length is performed so as to satisfy a predetermined product length. Then, the obtained winding roll is cut into a predetermined width.
In the winding process, for example, a winder having a mandrel shaft can be used as follows. (1) First, a paper tube serving as a winding core is inserted into a mandrel shaft and fixed. (2) Adhesive is attached to the paper tube, and the starting end of the toilet paper is bonded and fixed to the paper tube. (3) By rotating the mandrel shaft, the 2-ply toilet paper is wound around the core tube by the length of the product.

(Toilet roll)
The present invention also relates to a toilet roll obtained by rolling the toilet paper described above. Since the toilet roll of this invention is comprised from the toilet paper mentioned above, it is excellent in a touch feeling. An excellent feeling of touch means that when a toilet roll is grasped, it is soft and excellent in compressibility.

  The winding length of the toilet roll of the present invention is preferably 25 m or more and 60 m or less. Here, if the toilet roll is a two-ply toilet roll, it is a two-unit wound length in which two toilet papers are stacked.

  The wound diameter (outer diameter) of the toilet roll of the present invention is preferably 110 mm or more and 120 mm or less. Here, the wound diameter (outer diameter) of the toilet roll is represented by R in FIG.

  Moreover, the toilet roll of this invention winds toilet paper around a paper tube. The paper tube diameter is preferably 30 mm or more and 40 mm or less. The paper tube diameter of the toilet roll is represented by S in FIG.

Winding density of toilet rolls of the present invention is preferably 0.16 m / cm ² or more, more preferably 0.20 m / cm ² or more, still more preferably 0.30 m / cm ² or more It is particularly preferably 0.60 m / cm ² or more. Also, toilet winding density of the trawl is preferably at 1.40 m / cm ² or less, more preferably 1.08 m / cm ² or less, further preferably 0.99 m / cm ² or less, More preferably, it is 0.80 m / cm ² or less.
Among them, in a toilet roll having a winding length of 25 m, the winding density is preferably 0.60 m / cm ² or more and 0.68 m / cm ² or less, and in a toilet roll having a winding length of 30 m, the winding density is set to 0.00. preferably 73m / cm ² or more 0.82 / cm ² or less, in the toilet rolls in winding length 45 m, is preferably 0.90 m / cm ² or more 1.08 m / cm ² or less, the winding length In a 60 m toilet roll, the winding density is preferably 1.25 g / m ² or more and 1.45 g / m ² or less.

The roll density of the toilet roll is divided by the roll cross-sectional area (P (dotted pattern portion in FIG. 4)), which is twice the length of the 2-ply toilet roll, excluding the cross-sectional area of the paper tube. It is the value calculated by this. That is, the winding density can be calculated by the following formula.
Winding density (m / cm ² ) = winding length × 2 / roll cross-sectional area

  The features of the present invention will be described more specifically with reference to examples and comparative examples. The materials, amounts used, ratios, processing details, processing procedures, and the like 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 construed as being limited by the specific examples shown below.

Example 1
A pulp slurry was prepared so that hardwood kraft pulp (hereinafter “LBKP”) was 70 mass% and softwood kraft pulp (hereinafter “NBKP”) was 30 mass% in the pulp component (100 mass%). Furthermore, a softening agent (manufactured by Seiko PMC Co., Ltd.) is added to the pulp slurry in an amount of 0.1% by mass (to the pulp component mass ratio) and cationized starch (manufactured by Oji Constarch Co., Ltd.) is added to 0.01% by mass. did. The pulp slurry thus prepared was made using a twin wire Yankee machine to obtain a toilet paper web.

The obtained two rolls of base paper were applied to a ply machine and bonded to two plies while unwinding. After pasting, the paper was calendered with a linear pressure of 7 kg / cm ² and wound up again to obtain a 2-ply toilet paper web.

The resulting 2-ply toilet paper web was wound on a processing machine, and the surface of the toilet paper web was embossed while being unwound. In the embossing process, an emboss was formed by passing a toilet paper web between a steel embossing roll and a rubber roll provided with a convex structure constituting the embossing pattern and embossing the embossing pattern.
In the embossing process, different emboss patterns were formed on the outside toilet paper and the inside toilet paper, respectively. Embossed rolls having an embossed pattern A with a convex structure height of 0.80 mm and a convex structure density (emboss density) of 21.2 pieces / cm ² were embossed with a pressure of 14 kgf / cm ² to form embosses. . Further, the winding inner toilet paper to form embossed with embossed convex structure height 0.75 mm, an embossing roll having a convex structure Density (embossed density) of 60 / cm ² embossed pattern B at a pressure of 12 kgf / cm ² .
After the embossing process, contact embossing is formed so that the convex surface of the embossing of the outer roll toilet paper and the inner roll toilet paper faces inside, so that the inner toilet paper protrudes from the roll inner toilet paper to the outer roll toilet paper. Bonding was performed. Then, the perforation for a break crossing in the width direction was formed at regular intervals along the longitudinal direction to obtain a roll-shaped toilet roll having a winding length shown in Table 1. The roll diameter (R in FIG. 4) of the obtained toilet roll was as shown in Table 1. The obtained toilet roll was cut into a predetermined width to obtain a 2-ply toilet roll (toilet roll product).

(Example 2)
Pressure embossing an embossed pattern as a Makisotogawa toilet paper 11 kgf / cm ^2, the winding inner toilet paper to 9 kgf / cm ^2, the basis weight, the winding length was changed as described in Table 2. Example A 2-ply toilet roll was obtained in the same manner as in 1.

(Comparative Example 1)
Embossed by embossing an embossed pattern A with a convex structure height of 0.8 mm and a convex structure density (emboss density) of 21.2 pieces / cm ² at a pressure of 14 kgf / cm ^{2 on} both the outer toilet paper and the inner toilet paper. A two-ply toilet roll was obtained in the same manner as in Example 1 except that was formed.

(Comparative Example 2)
Embossing is formed by embossing the embossed pattern B with a convex structure height of 0.75 mm and a convex structure density (emboss density) of 60 pieces / cm ² at a pressure of 9 kgf / cm ^{2 on} both the outer toilet paper and the inner toilet paper. Then, a 2-ply toilet roll was obtained in the same manner as in Example 1 except that the basis weight was changed as described in Table 1.

(Comparative Example 3)
Embossing is formed by embossing embossing pattern A with convex structure height of 0.75 mm and convex structure density (emboss density) of 60 pieces / cm ² at a pressure of 11 kgf / cm ^{2 on} both the outer toilet paper and the inner toilet paper. Then, a 2-ply toilet roll was obtained in the same manner as in Example 1 except that the basis weight and the winding length were changed as shown in Table 2.

(Evaluation)
(Emboss height)
First, using the high-precision shape measurement system KS-1100 (manufactured by KEYENCE), height data on the surface (inside surface) of the outer toilet paper and the inner toilet paper was acquired. The acquisition range was 1 cm square, and the image acquisition pitch was 10 μm. Next, the acquired image data was read into image analysis software IOMate 2007 (manufactured by I-Spec Co., Ltd.), and the obtained height data was classified into 256 gradations. After removing data of defective parts such as holes, a graph was created with the horizontal axis representing gradation and the vertical axis representing the number of data. For the created graph, take a moving average with a total of 5 points (front and back), redraw the graph, and calculate the slope of the graph at each point of the newly redrawn graph. Calculated using the value. With respect to the obtained slope data, a moving average was taken at a total of 7 points before and after three points, and another graph was created with the horizontal axis representing gradation and the vertical axis representing the slope after moving average acquisition. The position of the first inflection point in the portion of the obtained slope graph after the lowest point was visually determined, and the gradation on the horizontal axis at that position was determined as a threshold value. Next, a weighted average of the height data was performed on the portion below the predetermined threshold, and the obtained average value was defined as “average height of non-embossed portion”. In addition, a weighted average of height data is also performed for a portion that is equal to or greater than a predetermined threshold, and the obtained average value is defined as “average height of embossed portion”. A value obtained by “average height of embossed portion” − “average height of non-embossed portion” was determined as the embossed height, and calculated for each ply.

(Basis weight)
The measured value of the basis weight indicates the measured value of 1 ply toilet paper. The basis weight was measured in accordance with JIS P 8124.

(Paper thickness)
The measured thickness value represents the measured value of 1 ply toilet paper. The thickness was read when the probe was lowered at a speed of 1 mm or less per second using a thickness meter (manufactured by Highbridge Seisakusho) in an environment conforming to ISO187. In addition, the measurement measured 10 sheets of 1-ply toilet paper one by one, and averaged the thicknesses of the acquired 10 sheets as the paper thickness.

(HF value)
The HF value of the toilet paper was measured using a tissue softness analyzer (manufactured by Emtec Electronic GmbH). A sample cut into a circle having a diameter of 112.8 mm was placed on a sample stage, and a bladed rotor was pushed into the sample from above by applying a pushing pressure of 100 mN. Thereafter, the bladed rotor was rotated so that the rotation speed was 2.0 rotations / second, and the vibration frequency at that time was measured. In addition, the amount of deformation in the vertical direction when the bladed rotor was pushed in with a pressure of 100 mN and 60 mN was calculated for another sample cut into a circle having a diameter of 112.8 mm. The HF value is a value calculated from the vibration frequency and the amount of deformation, and TP II was used as the calculation algorithm. In addition, said measurement is performed 10 times each about the exposed side surface of the outer roll toilet paper and the exposed roll surface of the roll inner toilet paper of each sample, and an abnormal value is excluded from the obtained measurement data by the Hampel identifier method. The average value was calculated for each surface. Furthermore, the average value of the HF values of both surfaces was calculated from the average value of the HF values of each surface calculated in this way, and used as the HF value for evaluation.
The sample was measured in an environment conforming to ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%). In the measurement, calibration was performed with a standard sample (emetec ref. 2X (nn.n)) according to the attached instruction, and the algorithm was set to TP II. The calculation software includes emtec measurement system Ver. 3.22 was used.

(Compressibility)
The compressibility of the toilet paper was measured using a KES FB3-AUTO-A automated compression tester (manufactured by Kato Tech Co., Ltd.). A sample cut into a 10cm x 20cm square was placed between the pressure plate of 2cm ^{2 and} the pressure plate, and the pressure plate was lowered at a speed of 50mm / sec. At that time, the pressure that changed every moment and the sample at that time The following items were calculated by measuring the thickness.
T ₀ : thickness of sample under pressure 0.5 gf / cm ² T _m : thickness of sample under pressure 50 gf / cm ² LC: compression linearity WC: work of compression RC: thickness recovery property Measure the outer side toilet paper and the inner side toilet paper, measure 10 times with the embossed concave surface (the surface against which the embossing roll is pressed) as the pressure plate side, and use the Hampel identifier method to obtain an abnormality from the obtained measurement data. It is a value calculated as an average value excluding the value. The sample was measured in an environment conforming to ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%).

(Tensile strength)
The measured value of the tensile strength is a measured value of 1 ply toilet paper, and indicates the dry tensile strength. The tensile strength was measured according to JIS P8113. The tensile strength in the longitudinal direction and the tensile strength in the transverse direction were measured for 6 samples each, and the average value was calculated as the tensile strength.

(Winding density)
The winding density of a 2-ply toilet roll was calculated. The winding density is calculated by dividing the length twice the winding length of the 2-ply toilet roll by the roll cross-sectional area excluding the cross-sectional area of the paper tube (P (dotted pattern portion in FIG. 4)). did. That is, the winding density can be calculated by the following formula.
Winding density (m / cm ² ) = winding length × 2 / roll cross-sectional area

(sensory evaluation)
The touch feeling and the softness of the roll were evaluated by 10 evaluators in a three-step evaluation. The feeling of touch was evaluated by applying the toilet paper in a state of being unwound about 40 cm from the roll to the skin, and evaluating the softness.
As for the softness of the roll, the softness when the roll was grasped by hand was evaluated. The softness was compared between toilet rolls with the same winding length. The evaluation results are expressed in three stages of ◯ Δ × when the winding length is 25 m, and in three stages of ABC when the winding length is 45 m.
<Feeling of touch>
○ or A: excellent △ or B: slightly inferior × or C: inferior <Softness of roll>
○ or A: soft △ or B: slightly hard × or C: hard

  The toilet paper obtained in the examples has an excellent touch feeling and forms a toilet roll excellent in the touch feeling.

1 Toilet paper 12 Outside roll toilet paper 14 Inside roll toilet paper 100 Toilet roll P Roll cross section R Roll roll diameter S Paper tube diameter

Claims (6)

2 or more ply toilet paper having an outer roll paper and an inner roll paper,
The embossed height of the outer roll toilet paper is 90 μm or more and 210 μm or less, and the emboss height of the roll inner toilet paper is 70 μm or more and 170 μm or less,
A toilet paper of 2 plies or more in which a difference between an embossed height of the wound outer toilet paper and an embossed height of the wound inner toilet paper is 10 μm or more and 50 μm or less. The compression recovery rate (RC ₁ ) of the outer-side toilet paper is 33% or more and 53% or less, and the compression recovery rate (RC ₂ ) of the inner-side toilet paper is 35% or more and 55% or less, (RC ₁ − toilet paper according to claim 1 RC ₂₎ the value is -1% or less -12% or more.   The toilet paper according to claim 1 or 2, wherein an emboss pattern of the outer roll toilet paper is different from an emboss pattern of the roll inner toilet paper. The embossing density of the roll-out side toilet paper is 10 / cm ² or more and 30 / cm ² or less,
The winding inner toilet paper embossing density 20 / cm ² or more according to 100 / cm ² any one of claims 1 to 3 or less is toilet paper. A toilet roll in which the toilet paper according to any one of claims 1 to 4 is rolled,
The roll length of the toilet roll is 25 m or more and 60 m or less,
The toilet roll of 2 plies or more in which the winding density of the toilet roll is 0.50 m / cm ² or more and 1.4 m / cm ² or less. An embossing process for embossing height of 90 μm or more and 210 μm or less on the outer roll toilet paper (A), and an embossing process for embossing height of 70 μm or more and 170 μm or less on the inner roll toilet paper (B);
Including the step of laminating the roll-inside toilet paper obtained in the step (A) and the roll-inside toilet paper obtained in the step (B),
2 ply or more toilet paper in which the difference between the embossed height of the outer toilet paper obtained in the step (A) and the embossed height of the inner toilet paper obtained in the step (B) is 10 μm or more and 50 μm or less. Manufacturing method.

Images