JP2018023490A - Toilet roll - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a toilet roll made of toilet paper having a good touch and without core crushing. The present invention is a toilet roll made by winding 1-ply toilet paper into a roll shape, wherein the length of the toilet roll is 95 m or more and 150 m or less, and the winding diameter is 110 mm or more and 120 mm or less. The present invention relates to a toilet roll in which the basis weight per ply of toilet paper is 10 g / m2 or more and 16 g / m2 or less, and the toilet paper is embossed. [Selection diagram] Fig. 1

Description

  The present invention relates to 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 is widely distributed, for example, in units of 12 rolls or 16 rolls. However, since these packaging bodies are bulky, the amount that can be carried is limited. In addition, storage space for toilet rolls tends to be insufficient in public facilities. For this reason, the use of roll products in which the roll length is increased by adjusting the paper thickness of the toilet paper constituting the toilet roll or by increasing the tightening force when winding the roll into a roll shape (for example, patent) References 1 and 2).

Patent Document 1 discloses a sanitary thin paper roll obtained by winding one sheet of sanitary thin paper into a roll, and the basis weight per sanitary thin paper is 16.5 to 21.5 g / m ² and the paper thickness is 1. A sanitary thin paper roll having a length of 0.6 to 1.1 mm / 10 sheets or less, a sanitary thin paper roll having a winding length of 120 to 185 m, and a winding diameter of 100 to 132 mm is disclosed. Here, improving the texture and feeling of use without lowering the basis weight has been studied.
Patent Document 2 discloses a roll product package in which a plurality of roll products are stored in a packaging bag made of a film. Patent Document 2 describes that when the roll product is one ply, the basis weight is preferably 16.5 to 21.5 g / m ² .

JP 2014-233363 A JP, 2015-101388, A

  In the conventional toilet roll having a long winding length, it is necessary to increase the strength of the toilet paper in order to tighten the toilet paper tightly in order to increase the winding length. However, toilet paper that can withstand tightening has increased strength, while tending to deteriorate its softness and touch.

  In addition, in a 1-ply toilet roll, in order to increase the winding length, the winding obtained in the winding process becomes hard, and the core (paper tube) may be crushed when cutting to a predetermined width. It was. The toilet roll in which the core core (paper tube) is crushed not only deteriorates the appearance, but also causes a problem that the toilet paper cannot be pulled out smoothly during use.

  In order to solve the problems of the prior art, the present inventors have made studies for the purpose of providing a toilet roll composed of toilet paper having a good touch. In addition, the inventors of the present invention have also studied for the purpose of providing a toilet roll having no core collapse.

As a result of intensive studies to solve the above problems, the present inventors set the basis weight of the toilet paper constituting the toilet roll within a predetermined range in one-ply toilet roll, and emboss the toilet paper. It has been found that, by forming, the touch of toilet paper constituting a toilet roll having a long winding length can be enhanced. Furthermore, the present inventors have found that in such a toilet roll, there is no occurrence of core core crushing, and the present invention has been completed.
Specifically, the present invention has the following configuration.

[1] A toilet roll that is rolled up by winding 1 ply of toilet paper, wherein the roll length of the toilet roll is 95 m or more and 150 m or less, the winding diameter is 110 mm or more and 120 mm or less, and 1 ply of toilet paper A toilet roll having a basis weight per unit of 10 g / m ² or more and 16 g / m ² or less, and the toilet paper is embossed.
[2] The toilet roll according to [1], wherein an average of hand feel values on the front and back surfaces of the toilet paper is 65.0 or more.
[3] The toilet roll according to [1] or [2], which has a thickness of 75 μm or more and 110 μm or less when a pressure of 50 gf / cm ² is applied to the toilet paper.
[4] The toilet roll according to any one of [1] to [3], which has a thickness of 180 μm or more and 300 μm or less when a pressure of 0.5 gf / cm ² is applied to the toilet paper.

  ADVANTAGE OF THE INVENTION According to this invention, the toilet roll of 1 ply with a long winding length can be comprised with the toilet paper with a favorable touch. Moreover, according to this invention, the toilet roll without a core core crushing can be obtained.

FIG. 1 is a schematic view illustrating the configuration of the toilet roll of the present invention. FIG. 2 is a schematic diagram illustrating the configuration of the toilet roll of the present invention.

  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 roll)
The present invention relates to a toilet roll that is rolled up by winding up one-ply toilet paper. Here, the winding length of the toilet roll of the present invention is 95 m or more and 150 m or less, and the winding diameter is 110 mm or more and 120 mm or less. Further, the basis weight per ply of the toilet paper constituting the toilet roll of the present invention is 10 g / m ² or more and 16 g / m ² or less. And the embossing is given to the 1 ply toilet paper which comprises the toilet roll of this invention.

  Since the toilet roll of this invention has the said structure, it is comprised with the toilet paper with favorable touch although it is a toilet roll with a long winding length. Moreover, since the toilet paper is embossed, the bulkiness and thickness of the toilet paper itself are not impaired. For this reason, although it is a 1-ply product and is a toilet roll with a long winding length, the usability of toilet paper does not fall. Furthermore, in this invention, it is suppressed that a core core is crushed when cutting to the predetermined width | variety at the time of comprising a toilet roll with long winding length.

  FIG. 1 is a schematic diagram illustrating the configuration of the toilet paper of the present invention. In FIG. 1, a toilet roll 100 composed of two-ply toilet paper 20 is illustrated. In the toilet roll 100, the surface disposed on the outer side of the toilet paper 20 is referred to as a front surface (a), and the surface disposed on the inner side is referred to as a back surface (b).

  The roll length (winding length) of the toilet roll of the present invention is 95 m or more and 150 m or less. A toilet roll having such a winding length is sometimes called a so-called long-rolling toilet roll. Moreover, it may be called a double roll toilet roll or a triple roll toilet roll.

  The roll diameter (outer diameter) of the toilet roll of the present invention is preferably 110 mm or more and 120 mm or less. Here, the roll diameter of the toilet roll is a length represented by R in FIG. By setting the roll diameter of the toilet roll within the above range, the toilet roll can be installed in any toilet roll holder, and the use scene is not limited.

The basis weight per ply of the toilet paper constituting the toilet roll of the present invention is 10 g / m ² or more and 16 g / m ² or less. The basis weight per ply of the toilet paper may be 10 g / m ² or more, preferably 11 g / m ² or more, and more preferably 12 g / m ² or more. The basis weight of 1 ply per toilet paper, as long 16g / m ² or less is preferably 15.5 g / m ² or less.
In this invention, it becomes easy to manufacture the toilet roll which has a desired winding diameter by making the basic weight of toilet paper into the said range. Usually, when manufacturing a toilet roll with a long winding length, the winding diameter is controlled by increasing the tightening force when the roll is wound into a roll. However, in the present invention, it is possible to manufacture a toilet roll having a desired winding diameter without increasing the tightening force at the time of winding in a roll shape to the strength in the conventional method. In addition, by suppressing the winding hardness, it is possible to more effectively suppress the occurrence of core core (paper tube) crushing when cutting to a predetermined width.

  The 1-ply toilet paper constituting the toilet roll of the present invention is embossed. In the present invention, embossing is formed substantially uniformly in the width direction of one-ply toilet paper. Here, when embossing is formed substantially uniformly in the width direction, embossing having a substantially uniform density is observed in the width direction in a region having a length of ± 0.5 cm (length: 1 cm) from an arbitrary point in the length direction. Is done. In the present invention, it is preferable that the emboss is formed substantially uniformly in the length direction. That is, the emboss is formed substantially uniformly over the entire area of the one-ply toilet paper. In the toilet roll shown in FIG. 1, the state of embossing applied to the rolled toilet paper is shown by black dots. As can be seen from the state of embossing of the toilet paper of FIG. 1, in the present invention, the emboss is formed substantially uniformly over the entire area of the toilet paper.

  Here, when the toilet paper is divided into three in the width direction, the difference in emboss density between adjacent regions is preferably 10% or less. Specifically, an area having a length of ± 0.5 cm (length 1 cm) from an arbitrary point in the length direction is cut out as a sample, and this sample is divided into three in the width direction. In this case, it is divided into a first area, a second area, and a third area in order from the edge. In the present invention, the difference in emboss density between the first region and the second region is preferably 10% or less, and the difference in emboss density between the second region and the third region is also preferably 10% or less. The difference in the emboss density between the first region and the third region is also preferably 10% or less.

In the embossing pattern of toilet paper, one emboss diameter 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 less. 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.

  Embossing is performed by applying an embossing roll to which embossing has been applied to the entire region in the width direction and applying pressure. The pushing amount of the embossing roll is preferably adjusted so that the thickness of the toilet paper satisfies the conditions described later.

The thickness (T _m ) when a pressure of 50 gf / cm ² is applied to the 1-ply toilet paper constituting the toilet roll of the present invention is preferably 75 μm or more, and more preferably 80 μm or more. Further, the thickness (T _m ) is preferably 110 μm or less, and more preferably 100 μm or less. By setting the thickness (T _m ) within the above range, it is possible to firmly feel the thickness of the toilet paper, and it is possible to obtain toilet paper that is excellent in touch and feel.

The thickness (T ₀ ) when a pressure of 0.5 gf / cm ² is applied to the 1-ply toilet paper constituting the toilet roll of the present invention is preferably 180 μm or more, more preferably 190 μm or more. Preferably, it is more preferably 200 μm or more, and particularly preferably 210 μm or more. Further, the thickness (T ₀ ) is preferably 300 μm or less, more preferably 280 μm or less, further preferably 260 μm or less, and particularly preferably 240 μm or less. By making the thickness (T ₀ ) within the above range, the touch of the toilet paper can be enhanced.

Here, the thickness (T ₀ ) and thickness (T _m ) values 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%).

  The toilet roll of the present invention is obtained by winding toilet paper around a core core (paper tube). The core core diameter is preferably 30 mm or more and 40 mm or less. The core diameter of the toilet roll is the diameter of the core (paper tube), and is the length represented by S in FIG.

Winding density of toilet rolls of the present invention, when the winding length is 95 m, is preferably 0.95 m / cm ² or more, and more preferably 1.03 m / cm ² or more. Further, it is preferably 1.15 m / cm ² or less, and more preferably 1.12 m / cm ² or less.
Winding density of toilet rolls, if the winding length of 120 m, is preferably 1.15 m / cm ² or more, and more preferably 1.31m / cm ² or more. Further, it is preferably 1.45 m / cm ² or less, more preferably 1.41 / cm ² or less.
Winding density of toilet rolls, if the winding length of 150 meters, is preferably 1.45 m / cm ² or more, and more preferably 1.63 m / cm ² or more. Further, it is preferably 1.85 m / cm ² or less, and more preferably 1.77 m / cm ² or less.
In addition, the said winding density is a value when a core core diameter is 39 mm.

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

  The average of the hand feel values of the front and back surfaces of the toilet paper of the present invention is preferably 65.0 or more, and more preferably 66.0 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 front and back surfaces are each measured 10 times, and the abnormal value is 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. Calculation software includes emetec measurement system ver. Use 3.22.

The tensile strength in the length direction of the toilet paper is preferably 1.00 N / 15 mm or more, and more preferably 1.30 N / 15 mm or more. Moreover, the tensile strength in the length direction of the toilet paper is preferably 3.00 N / 15 mm or less, and more preferably 2.60 N / 15 mm or less.
The tensile strength in the width direction of the toilet paper is preferably 0.30 N / 15 mm or more, and more preferably 0.40 N / 15 mm or more. Moreover, the tensile strength in the width direction of the toilet paper is preferably 2.00 N / 15 mm or less, more preferably 1.50 N / 15 mm or less, and further preferably 1.20 N / 15 mm or less.

  The measurement of the tensile strength of 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 conditions of a tensile speed of 50 mm / min and a span length of 100 mm. 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%).

(Textile raw material)
Toilet paper 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 basis weight, HF value, etc. of the 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 content of hardwood pulp within the above range, it becomes easy to set the basis weight, HF value, etc. of the toilet paper within a desired range.

  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 setting the freeness of the fiber component within the above range, it becomes easy to set the basis weight, HF value, etc. of the toilet paper within a desired range, and toilet paper excellent in touch feeling can be obtained. The freeness of the fiber component can be adjusted by controlling the beating conditions as will be described later.

(Optional component)
The toilet paper 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.
In the present invention, the strength of the toilet paper is maintained even when the basis weight is lowered by appropriately adjusting the amount of the optional component as described above.

(Toilet roll manufacturing method)
The method for producing a toilet roll of the present invention includes a step of obtaining a one-ply toilet paper web, a step of embossing the toilet paper, and a step of winding the embossed toilet paper into a roll.
In addition, in the whole process of the manufacturing method of a toilet roll, the process of performing said embossing is provided only once.

  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 embossing step, embossing is performed on a one-ply toilet paper web. Embossing is performed by passing a 1-ply 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, embossing having a desired embossing height can be formed.
Here, the embossing roll used for embossing is preferably provided with a convex structure having a convex structure height of 0.75 mm or more and 0.85 mm or less. The embossing roll is preferably provided with a substantially uniform convex structure having a convex structure density (emboss density) of 10 pieces / cm ² or more and 30 pieces / cm ² or less. And in embossing, it is preferable to emboss said embossing roll with the pressure of 8 kgf / cm or more and 20 kgf / cm or less.

A winding process is further provided after the embossing process. In the winding process, winding is performed for a predetermined length 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 to be a 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 toilet paper is wound around the paper tube by the length of the product.

  Further, in the winding process, when winding, it is possible to wind while supporting the roll from the outside with a plurality of driving rolls (for example, an upper roll, a lower roll, a rider roll, etc.). It is also preferable to use a method (surface system). By performing winding by the surface method, the pressing pressure of the drive roll can be adjusted, and the roll diameter of the toilet roll can be easily controlled. In addition, the production speed can be increased.

  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
The pulp slurry mixed so as to be 23 parts by mass of softwood kraft pulp (NKP) and 77 parts by mass of hardwood kraft pulp (LKP) was beaten using a double disc refiner with a beating power of 200 Kw. A pulp slurry for papermaking was prepared by adding 0.02 part by mass of a softening agent (manufactured by Seiko PMC) and 0.05 part by mass of a wet paper strength agent (manufactured by Seiko PMC) to the above pulp slurry.
The prepared pulp slurry for papermaking was made with a twin wire Yankee machine to obtain a toilet paper web. The papermaking conditions were adjusted so that the basis weight (1 ply) of the toilet paper was as shown in Table 1.
The obtained base paper roll was applied to a processing machine, unwound, and then embossed. Thereafter, the toilet paper was wound around a core core having a core core diameter of 39 mm by a surface method. In the surface type winding process, the pressing pressure of the rider roll was adjusted so as to have the winding diameter shown in Table 1, and the winding was performed again so as to have the length shown in Table 1. The obtained winding was cut to a predetermined width to obtain a 1-ply toilet roll.

(Example 2)
Except for beating the pulp slurry mixed at 15 parts by weight of softwood kraft pulp (NKP) and 85 parts by weight of hardwood kraft pulp (LKP) so that the basis weight is as described in Table 1, with beating power of 150 Kw In the same manner as in Example 1, a 1-ply toilet roll was obtained.

(Example 3)
Except for beating the pulp slurry mixed so that the basis weight is as described in Table 1 to 20 parts by weight of softwood kraft pulp (NKP) and 75 parts by weight of hardwood kraft pulp (LKP) with a beating power of 150 Kw A 1-ply toilet roll was obtained in the same manner as in Example 1.

(Comparative Example 1)
So that the basis weight is as shown in Table 1, the pulp slurry mixed so that it becomes 23 parts by mass of softwood kraft pulp (NKP) and 77 parts by mass of hardwood kraft pulp (LKP) is beaten at a beating power of 250 Kw, and soft A 1-ply toilet roll was obtained in the same manner as in Example 1 except that the addition amount of the agent was changed to 0.05 parts by mass.
(Comparative Examples 2 and 3)
Comparative Examples 2 and 3 are known products that are commercially available.

(Evaluation)
(Basis weight)
The basis weight of the toilet paper obtained in Examples and Comparative Examples was measured in accordance with JIS P 8124.

(Tensile strength)
The tensile strength of the toilet paper obtained in Examples and Comparative Examples was measured using a horizontal tensile tester (manufactured by Kumagai Riki Co., Ltd.) under the conditions of a sample width of 15 mm, a tensile speed of 50 mm / min, and a span length of 100 mm. In addition, the tensile strength measured the intensity | strength of the vertical direction and the horizontal direction of 1 ply toilet paper. For each direction, the average value of 6 samples was calculated as the tensile strength. The tensile strength was measured in an environment conforming to ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%).

(Measurement of HF value)
The HF value of the toilet paper obtained in Examples and Comparative Examples 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 surface (outer surface) and back surface (inner surface) of each sample, an abnormal value is excluded from the obtained measurement data by the Hampel identifier method, and average values are obtained for the front surface and the back surface, respectively. Was calculated. Furthermore, the average value of the HF values of the two surfaces calculated in this way was calculated and used for evaluation as the HF value.
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 emetec measurement system ver. 3.22 was used.

(Compressibility)
About the compressibility of the toilet paper obtained by the Example and the comparative example, it measured using the KES FB3-AUTO-A automatic compression tester (made by Kato Tech Co., Ltd.). A sample cut to 10 cm x 10 cm is placed between the pressure plate of 2 cm ^{2 and} the pressure plate, and the pressure plate is lowered at a speed of 50 seconds / mm. At that time, the pressure that changes momentarily and the thickness of the sample at that time The following items were calculated by measuring
T ₀ : Sample thickness under a pressure of 0.5 gf / cm ² T _m : Sample thickness under a pressure of 50 gf / cm ² The values of the above items are measured data obtained by performing 10 measurements for each sample. From this, the abnormal value is excluded by the Hampel identifier method, and the value is calculated as an average value. The sample was measured in an environment conforming to ISO 187 (temperature 23 ± 1 ° C., relative humidity 50 ± 2%).

(Processability)
A winding process is provided after the embossing process. In the winding process, winding for a predetermined length is performed, and then the obtained winding is cut into a predetermined width. The state of the cross section after cutting was observed for 50 rolls, and the state of the core core (paper tube) of the toilet roll was evaluated in three stages. The symbols shown in Table 1 have the following meanings.
<Core collapse>
○: Core core is not crushed, normal △: Core core is crushed in the range of 1 to less than 10 ×: Core core is crushed in 10 or more

(sensory evaluation)
About the toilet paper obtained by the Example and the comparative example, sensory evaluation was implemented in the state which hid the level. Fifty people touched the product and evaluated the touch of the product in three stages. The symbols shown in Table 1 have the following meanings.
<Feel>
○: Excellent △: Somewhat inferior ×: Inferior

  As can be seen from Table 1, the toilet paper obtained in the examples had good touch and excellent processability. On the other hand, in the comparative example 1, the malfunction that the core core was crushed in the manufacturing process of the toilet roll occurred. Moreover, the toilet paper obtained in Comparative Examples 2 and 3 was inferior to the touch.

20 Toilet paper 100 Toilet roll a Front surface b Back surface P Cross-sectional area of toilet roll roll R Roll diameter of toilet roll roll S Paper tube diameter

Claims (4)

A roll of toilet roll which is rolled up by winding 1 ply of toilet paper,
The length of the toilet roll is 95 m or more and 150 m or less, and the winding diameter is 110 mm or more and 120 mm or less,
The basis weight per ply of the toilet paper is 10 g / m ² or more and 16 g / m ² or less,
A toilet roll in which the toilet paper is embossed.   The toilet roll according to claim 1, wherein an average of hand feel values of the front and back surfaces of the toilet paper is 65.0 or more. The toilet roll according to claim 1 or 2, wherein a thickness when the pressure of 50 gf / cm ² is applied to the toilet paper is 75 µm or more and 110 µm or less. The toilet roll according to any one of claims 1 to 3, wherein a thickness when a pressure of 0.5 gf / cm ² is applied to the toilet paper is 180 µm or more and 300 µm or less.

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