JP7287531B2 - toilet roll - Google Patents

Description

The present invention relates to toilet rolls.

A toilet paper product is manufactured by cutting into a predetermined size a toilet paper made by stacking one or more toilet paper webs. In general, a toilet roll (rolled toilet paper) is often used, which is obtained by winding a long toilet paper into a roll. Toilet paper consisting of a single toilet paper web is referred to as one-ply toilet paper, and toilet paper consisting of two-ply toilet paper webs is referred to as two-ply toilet paper.

Toilet paper is widely distributed in units of, for example, 12 rolls or 16 rolls. However, these packages are bulky, limiting the amount they can carry. In addition, public facilities tend to run out of storage space for toilet rolls. For this reason, the use of roll products with a longer roll length is also progressing by adjusting the paper thickness of the toilet paper that makes up the toilet roll or by strengthening the winding force when winding into a roll (for example, patent References 1 and 2).

Patent Document 1 discloses a sanitary thin paper roll obtained by winding a single sanitary thin paper into a roll, wherein the basis weight per sheet of sanitary thin paper is 16.5 to 21.5 g/m ² and the paper thickness is It discloses a sanitary thin paper roll having a thickness of 0.6 to 1.1 mm/10 sheets or less, a roll length of 120 to 185 m, and a roll diameter of 100 to 132 mm. Here, it is considered to improve the texture and usability without lowering the basis weight.
Further, Patent Document 2 discloses a roll product package in which a plurality of roll products are contained in a packaging bag made of 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 conventional toilet rolls with a longer winding length, the toilet paper is tightly wound in order to increase the winding length, so the strength of the toilet paper must be increased. However, in the case of toilet paper that can withstand being rolled up, although the strength is increased, the softness and feel of the paper itself tend to deteriorate.

In addition, in the case of a one-ply toilet roll, the roll obtained in the winding process becomes stiff due to the lengthening of the roll length, and the core (paper tube) may be crushed when it is cut to a predetermined width. rice field. A toilet roll with a crushed core (paper tube) not only has a bad appearance, but also causes a problem that the toilet paper cannot be pulled out smoothly during use.

Therefore, in order to solve the problems of the prior art, the present inventors conducted studies with the aim of providing a toilet roll made of toilet paper with a good texture. The present inventors also proceeded with studies with the objective of providing a toilet roll free from core collapse.

As a result of intensive studies to solve the above problems, the present inventors have found that in a one-ply toilet roll, the basis weight of the toilet paper constituting the toilet roll is set within a predetermined range, and the toilet paper is embossed. The inventors have found that by forming such a structure, it is possible to improve the feel of the toilet paper constituting a toilet roll having a long roll length. Furthermore, the present inventors have discovered that such a toilet roll does not cause core collapse, and have completed the present invention.
Specifically, the present invention has the following configurations.

[1] A toilet roll made by winding one-ply toilet paper into a roll, the toilet roll having a roll length of 95 m or more and 150 m or less, a roll diameter of 110 mm or more and 120 mm or less, and one ply of toilet paper. A toilet roll having a basis weight of 10 g/m ² or more and 16 g/m ² or less, wherein the toilet paper is embossed.
[2] The toilet roll according to [1], wherein the average hand feel value of 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.

According to the present invention, a one-ply toilet roll having a long winding length can be made of toilet paper that is pleasant to the touch. Moreover, according to the present invention, it is possible to obtain a toilet roll free from core collapse.

FIG. 1 is a schematic diagram 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.

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

(toilet roll)
TECHNICAL FIELD The present invention relates to a toilet roll formed by winding one-ply toilet paper into a roll. Here, the roll length of the toilet roll of the present invention is 95 m or more and 150 m or less, and the roll diameter is 110 mm or more and 120 mm or less. Moreover, 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 one-ply toilet paper constituting the toilet roll of the present invention is embossed.

Since the toilet roll of the present invention has the above structure, it is composed of toilet paper that is pleasant to the touch, even though 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. Therefore, even though the toilet roll is a one-ply product and has a long winding length, the feeling of use of the toilet paper is not deteriorated. Further, in the present invention, crushing of the core core is suppressed when cutting to a predetermined width when constructing a toilet roll having a long winding length.

FIG. 1 is a schematic diagram illustrating the configuration of the toilet paper of the present invention. FIG. 1 illustrates a toilet roll 100 composed of two plies of toilet paper 20 . In the toilet roll 100, the surface of the toilet paper 20 that is arranged on the outside of the roll is called the surface (a), and the surface that is arranged on the inside of the roll is called the back surface (b).

The winding 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 roll toilet roll. Also, it is sometimes called a double-wound toilet roll or a triple-wound toilet roll.

The winding diameter (outer diameter) of the toilet roll of the present invention is preferably 110 mm or more and 120 mm or less. Here, the winding diameter of the toilet roll is the length represented by R in FIG. By setting the winding diameter of the toilet roll within the above range, the toilet roll can be installed in any toilet roll holder, and there are no restrictions on the usage scene.

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 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. Moreover, the basis weight per ply of the toilet paper may be 16 g/m ² or less, preferably 15.5 g/m ² or less.
In the present invention, by setting the basis weight of the toilet paper within the above range, it becomes easier to manufacture a toilet roll having a desired winding diameter. Normally, when a toilet roll having a long roll length is manufactured, the roll diameter is controlled by increasing the tightening force when winding the roll. However, in the present invention, it is possible to manufacture a toilet roll having a desired winding diameter without increasing the winding force when winding into a roll shape to the strength of the conventional method. In addition, by suppressing the hardness of winding, it is possible to more effectively suppress the occurrence of crushing of the core (paper tube) when cutting to a predetermined width.

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

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

In the emboss pattern of toilet paper, the diameter of one emboss is preferably 0.5 mm or more and 2 mm or less, more preferably 0.7 mm or more and 1.3 mm or less. The emboss density is preferably 10/cm ² or more and 30/cm ² or less, more preferably 15/cm ² or more and 25/cm ² or less.

Embossing is performed by applying an embossed roll to the entire 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 ) of the one-ply toilet paper constituting the toilet roll of the present invention when a pressure of 50 gf/cm ² is applied is preferably 75 μm or more, more preferably 80 μm or more. Also, the thickness (T _m ) is preferably 110 μm or less, more preferably 100 μm or less. By setting the thickness (T _m ) within the above range, the thickness of the toilet paper can be felt firmly, and the toilet paper can be obtained with excellent touch and feel.

The thickness (T ₀ ) of the one-ply toilet paper constituting the toilet roll of the present invention is preferably 180 μm or more, more preferably 190 μm or more when a pressure of 0.5 gf/cm ² is applied. It is preferably 200 μm or more, and particularly preferably 210 μm or more. The thickness (T ₀ ) is preferably 300 µm or less, more preferably 280 µm or less, still more preferably 260 µm or less, and particularly preferably 240 µm or less. By setting the thickness (T ₀ ) within the above range, the feel 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 automatic compression tester (manufactured by Kato Tech Co., Ltd.). Specifically, a sample cut to a size of 10 cm × 20 cm was placed between a 2 cm ² pressure plate and a pressure receiving plate of a KES FB3-AUTO-A automated compression tester, and the pressure plate was measured at a speed of 50 seconds / mm. is lowered, and the pressure that changes at that time and the thickness of the sample at that time are measured. T ₀ is the thickness (mm) of the sample at a pressure of 0.5 gf/cm ² and T _m is the thickness (mm) of the sample at a pressure of 50 gf/cm ² . The values of T ₀ and T _m are measured 10 times with the concave surface of the embossing (the surface pressed against the embossing roll) as the pressure plate side, and abnormal values are excluded from the obtained measurement data by the method of Hampel identifier. It is a value calculated as a value. Note that the above samples are measured in an environment conforming to ISO187 (temperature 23±1° C., relative humidity 50±2%).

The toilet roll of the present invention is made by winding toilet paper around a core (paper tube). The 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 indicated by S in FIG.

The winding density of the toilet roll of the present invention is preferably 0.95 m/cm ² or more, more preferably 1.03 m/cm ² or more, when the winding length is 95 m. Also, it is preferably 1.15 m/cm ² or less, more preferably 1.12 m/cm ² or less.
The winding density of the toilet roll is preferably 1.15 m/cm ² or more, more preferably 1.31 m/cm ² or more, when the roll length is 120 m. Also, it is preferably 1.45 m/cm ² or less, more preferably 1.41 m/cm ² or less.
The winding density of the toilet roll is preferably 1.45 m/cm ² or more, more preferably 1.63 m/cm ² or more, when the roll length is 150 m. Also, it is preferably 1.85 m/cm ² or less, more preferably 1.77 m/cm ² or less.
The above winding density is a value when the core diameter is 39 mm.

The winding density of the toilet roll was calculated by dividing the winding length of the two-ply toilet roll by the cross-sectional area of the roll excluding the cross-sectional area of the paper tube (P (dot 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 hand feel value of the front and back surfaces of the toilet paper of the present invention is preferably 65.0 or more, more preferably 66.0 or more. Although the upper limit of the HF value is not particularly limited, it is generally preferably 95.0 or less.

Here, the hand feel value (HF value) can be measured by the following measuring 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 table of the tissue softness analyzer. A bladed rotor is pushed into the sample from above with a pushing pressure of 100 mN. After that, the bladed rotor is rotated at a rotation speed of 2.0 rpm, and the vibration frequency at that time is measured.
In addition, for another sample cut into a circle with a diameter of 112.8 mm, the amount of deformation displacement in the vertical direction when the bladed rotor is pushed in with pressures of 100 mN and 60 mN is calculated. The HF value is a value calculated from the vibration frequency and the amount of deformation displacement, and TP II can be used for the calculation algorithm.
When calculating the HF value, measurement is performed 10 times on each of the front and back surfaces, and abnormal values are excluded from the obtained measurement data by the Hampel identifier method. Then, the average HF value of the toilet paper is calculated from the average HF value of each surface.
Note that the above samples are measured in an environment conforming to ISO187 (temperature 23±1° C., relative humidity 50±2%). Also, when measuring, calibrate with a standard sample (emetec ref. 2X (nn.n)) according to the attached instructions, and set the algorithm to TP II. As calculation software, emetec measurement system ver. 3.22 is used.

The tensile strength in the longitudinal direction of the toilet paper is preferably 1.00 N/15 mm or more, more preferably 1.30 N/15 mm or more. Moreover, the tensile strength of the toilet paper in the longitudinal direction is preferably 3.00 N/15 mm or less, 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, more preferably 0.40 N/15 mm or more. 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 even more preferably 1.20 N/15 mm or less.

The tensile strength of toilet paper can be measured using a horizontal tensile tester (manufactured by Kumagai Riki Co., Ltd.). In this case, a sample with a width of 15 mm is used, and the 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 the average value of 6 samples. The tensile strength is measured in an environment conforming to ISO187 (temperature 23±1° C., relative humidity 50±2%).

(fiber raw material)
Toilet paper is obtained by papermaking a slurry containing a fibrous raw material. Pulp is preferably used as the fiber raw material. Pulp includes 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 kraft pulp. Pulp (UKP), chemical pulp such as oxygen-bleached kraft pulp (OKP), and the like. Semi-chemical pulp (SCP), semi-chemical pulp such as chemigroundwood pulp (CGP), groundwood pulp (GP), mechanical pulp such as thermomechanical pulp (TMP, BCTMP), etc. may also be mentioned, but are not particularly limited. Examples of non-wood pulp include, but are not limited to, cotton pulp such as cotton linters and cotton lint, non-wood pulp such as hemp, straw, and bagasse, and cellulose, chitin, and chitosan isolated from sea squirts, seaweed, and the like. . The deinked pulp includes deinked 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 kind selected from softwood pulp and hardwood pulp, and it is preferable to use softwood pulp. Among them, in the present invention, softwood pulp and hardwood pulp are preferably used in combination, and softwood kraft pulp (NKP) and hardwood kraft pulp (LKP) are more preferably used in combination.

When softwood pulp is used as the fiber raw material, the content of the softwood pulp is preferably 20% by mass or more, more preferably 30% by mass or more, relative to the total mass of the pulp components contained in the toilet paper. More preferably, it is 40% by mass or more. Also, the content of the softwood pulp is preferably 80% by mass or less with respect to the total mass of the pulp components contained in the toilet paper. By setting the content of the softwood pulp within the above range, it becomes easy to set the basis weight, HF value, etc. of the toilet paper within the desired range.

It is preferable to use a combination of softwood pulp and hardwood pulp as the fiber raw material. That is, it is preferable that the toilet paper further contains hardwood pulp in addition to softwood pulp. The hardwood pulp content is preferably 10% by mass or more, more preferably 20% by mass or more, and more preferably 30% by mass or more, relative to the total mass of the pulp components contained in the toilet paper. More preferred. Moreover, the content of the hardwood pulp is preferably 70% by mass or less with respect to the total mass of the pulp components contained in the toilet paper. By setting the content of the hardwood pulp within the above range, it becomes easy to set the basis weight, HF value, etc. of the toilet paper within the desired range.

The freeness represented by the Canadian Freeness Standard (CFS) of the fibrous component (pulp component) contained in the toilet paper is preferably 400 ml or more, more preferably 450 ml or more, and 500 ml. It is more preferable that it is above. Also, 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 grammage, HF value, etc. of the toilet paper within the desired range, and a toilet paper with excellent 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 optional components in addition to the fiber raw material. Examples of optional components include dry paper strength agents, wet paper strength agents, and softening agents. Examples of dry paper strength agents include cationized starch, polyacrylamide (PAM), carboxymethylcellulose (CMC) and the like. Examples of wet paper strength agents include polyamide epichlorohydrin, urea, melamine, and thermally crosslinkable polyacrylamide. Examples of softening agents include anionic surfactants, nonionic surfactants, and cationic surfactants. The above optional components may be used singly 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 are preferable.
When the toilet paper contains a wet paper strength agent, the content of the wet paper strength agent is 0.001 parts 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 are preferable.
In addition, when the toilet paper contains a softening agent, the content of the softening agent 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.
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 added as described above.

(Toilet roll manufacturing method)
The toilet roll manufacturing method of the present invention includes the steps of obtaining a one-ply toilet paper web, embossing the toilet paper, and winding the embossed toilet paper into a roll.
The embossing process described above is provided only once in all the processes of the toilet roll manufacturing method.

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

The step of obtaining a one-ply toilet paper web includes the step of papermaking a slurry containing fibrous raw materials. Examples of paper machines used in the papermaking process include suction breast formers (cylinder type, fourdrinier type), twin wire formers, cylinder formers (C wrap, S wrap), crescent formers, and the like. can be mentioned.

In the papermaking process, a slurry containing a fiber raw material is supplied onto a mesh wire to form a thin layer of pulp. The pulp lamina is then dewatered by draining the moisture in the pulp lamina under the screen while being transported towards the press part. Such a process is sometimes called a dehydration process. Typically, the wire is a loop of metal or plastic mesh.

In the papermaking step, for example, a pulp slurry in which softwood pulp and hardwood pulp are mixed is made into paper to form a wet paper as one uniform layer, or a softwood pulp layer and a hardwood pulp layer are combined to form one sheet. However, any method may be adopted.

After the dewatering process, the wet paper is transferred from the wire to the felt. The wet paper web is further mechanically dewatered by applying pressure with press rolls through the felt. This is sometimes called a pressing process or a water squeezing process.

It is preferable that the papermaking step further includes a drying step after the water squeezing step. The drying step is preferably, for example, a step of blowing hot air toward the wet paper or a step of pressing a dryer cylinder against the outer peripheral surface.

In the embossing step, the one-ply toilet paper web is embossed. Embossing is performed by passing a one-ply toilet paper web between an embossing roll on which convex structures forming the embossed pattern are placed and a rubber roll to emboss the embossed pattern. Embossing with a desired embossing height can be formed by changing the embossing height of the embossing roll, the pressing amount, and the pressing pressure.
Here, it is preferable that the embossing roll used for embossing is provided with a convex structure having a height of 0.75 mm or more and 0.85 mm or less. Further, it is preferable that the embossing roll is provided with substantially uniform convex structures having a convex structure density (embossing density) of 10/cm ² or more and 30/cm ² or less. In the embossing process, the embossing roll is preferably embossed with a pressure of 8 kgf/cm or more and 20 kgf/cm or less.

A winding process is further provided after the embossing process. In this winding process, winding is performed for a predetermined length so as to satisfy a predetermined product length. Then, the obtained take-up roll is cut to a predetermined width.
The winding process can be carried out as follows using, for example, a winder having a mandrel shaft. (1) First, a paper tube, which serves as a winding core, is inserted into the mandrel shaft and fixed. (2) Adhesive is applied to the paper tube, and the starting end of the toilet paper is adhered 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.

In the winding process, the roll can be wound while being supported by a plurality of drive rolls (for example, upper roll, lower roll, rider roll, etc.) from the outside when winding. It is also preferable to use the method (surface method). Winding by the surface method makes it possible to adjust the pressing pressure of the drive roll, making it easier to control the roll diameter of the toilet roll. Also, production speed can be increased.

EXAMPLES The characteristics of the present invention will be described more specifically below with reference to examples and comparative examples. The materials, amounts used, proportions, treatment details, treatment procedures, etc. shown in the following examples can be changed as appropriate without departing from the gist of the present invention. Therefore, the scope of the present invention should not be construed to be limited by the specific examples shown below.

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

(Example 2)
15 parts by mass of softwood kraft pulp (NKP) and 85 parts by mass of hardwood kraft pulp (LKP) were mixed so that the basis weight was as shown in Table 1, and the pulp slurry was beaten at a beating power of 150 Kw. , to obtain a one-ply toilet roll in the same manner as in Example 1.

(Example 3)
The pulp slurry was mixed so that 20 parts by mass of softwood kraft pulp (NKP) and 75 parts by mass of hardwood kraft pulp (LKP) were mixed so that the basis weight was as shown in Table 1, and the pulp slurry was beaten at a beating power of 150 Kw. A one-ply toilet roll was obtained in the same manner as in Example 1.

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

(evaluation)
(basis weight)
The basis weight of the toilet paper obtained in Examples and Comparative Examples was measured according to 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 conditions of a sample width of 15 mm, a tensile speed of 50 mm/min, and a span length of 100 mm. The tensile strength was measured in both the vertical and horizontal directions of the one-ply toilet paper. The average value of 6 samples in each direction was calculated as the respective tensile strength. The tensile strength was measured in an environment conforming to ISO187 (temperature 23±1° C., relative humidity 50±2%).

(Measurement of HF value)
The HF values of the toilet papers obtained in Examples and Comparative Examples were measured using a tissue softness analyzer (manufactured by Emtec Electronic GmbH). A sample cut into a circle with a diameter of 112.8 mm was placed on a sample table, and a rotor with blades was pressed into the sample from above by applying a pressing pressure of 100 mN. After that, the bladed rotor was rotated at a rotation speed of 2.0 rpm, and the vibration frequency at that time was measured. In addition, the amount of deformation displacement in the vertical direction was calculated when the rotor with blades was pushed in with a pressure of 100 mN and 60 mN for another sample cut into a circle with a diameter of 112.8 mm. The HF value is a value calculated from the vibration frequency and the amount of deformation displacement, and TPII was used as the calculation algorithm. The above measurements were performed 10 times on the front surface (outer surface) and the back surface (inner surface) of each sample. was calculated. Furthermore, the average value of the HF values of the two surfaces thus calculated was calculated and used as the HF value for evaluation.
The above samples were measured in an environment conforming to ISO187 (temperature 23±1° C., relative humidity 50±2%). Further, at the time of measurement, calibration was performed with a standard sample (emetec ref. 2X (nn.n)) according to the attached instructions, and the algorithm was set to TP II. Calculation software used is emetec measurement system ver. 3.22 was used.

(compressibility)
The compressibility of the toilet paper obtained in Examples and Comparative Examples was measured using a KES FB3-AUTO-A automated compression tester (manufactured by Kato Tech Co., Ltd.). A sample cut to 10 cm × 10 cm was placed between a pressure plate of 2 cm ² and a pressure receiving plate, and the pressure plate was lowered at a speed of 50 seconds/mm. By measuring the following items were calculated.
T ₀ : Thickness of sample under pressure of 0.5 gf/cm ² T _m : Thickness of sample under pressure of 50 gf/cm ² The values of the above items are measurement data obtained by performing 10 measurements for each sample. This is a value calculated as an average value after excluding abnormal values by the method of Hampel identifier. The above samples were measured in an environment conforming to ISO187 (temperature 23±1° C., relative humidity 50±2%).

(Processability)
A winding process is provided after the embossing process. In the winding process, a predetermined length is wound, and then the obtained winding is cut to a predetermined width. The state of the cross section after cutting was observed for 50 rolls, and the state of the core (paper tube) of the toilet roll was evaluated in three stages. The symbols shown in Table 1 have the following meanings.
<Core collapse>
○: No core collapse occurred, normal △: Collapse occurred at 1 or more but less than 10 core cores ×: Collapse occurred at 10 or more core cores

(sensory evaluation)
Sensory evaluation was carried out on the toilet papers obtained in Examples and Comparative Examples with the level hidden. The product was touched by 50 people, and the feel of the product was evaluated in 3 stages. The symbols shown in Table 1 have the following meanings.
<touch>
○: Excellent △: Slightly inferior ×: Inferior

As can be seen from Table 1, the toilet paper obtained in Examples had a good texture and excellent processability. On the other hand, in Comparative Example 1, there was a problem that the core was crushed during the manufacturing process of the toilet roll. Moreover, the toilet papers obtained in Comparative Examples 2 and 3 were inferior in texture.

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

Claims (2)

a step of embossing one-ply toilet paper;
A method for manufacturing a toilet roll, comprising winding embossed toilet paper into a roll,
The step of applying the embossing is a step of forming embossments on one-ply toilet paper with an embossing roll provided with a plurality of convex structures constituting an embossed pattern,
In the embossing step, the embossing roll is embossed with a pressure of 8 kgf/cm or more and 20 kgf/cm or less,
The roll length of the toilet roll is 95 m or more and 150 m or less,
The winding diameter of the toilet roll 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 method for producing a toilet roll, wherein the toilet paper has a thickness of 180 μm or more and 300 μm or less when a pressure of 0.5 gf/cm ² is applied. The method for manufacturing a toilet roll according to claim 1 , wherein the height of the convex structure is 0.85 mm or less.

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