Rolling sanitary paper set package

Abstract

This invention provides a packaged form of toilet paper rolls. It offers toilet paper with excellent thickness and hydrolysis properties, sufficient softness, improved wiping performance during use, and environmental considerations. The problem of this invention is solved by a packaged form of toilet paper rolls, which utilizes a resin-based packaging film to encase the toilet paper rolls in a corner-supported manner. The toilet paper rolls are formed by rolling toilet paper into a roll. The packaging film has a thickness of 40μm to 60μm, a winding length of 34.9m to 55.1m, a cut count of 306 to 483 cuts, and a roll stiffness of 68N or higher and 92N or lower. The toilet paper has a laminated structure consisting of three or more sheets stacked together, with each layer having a thickness exceeding 78μm and less than 100μm, and a basis weight exceeding 13.5g / m³. 2 And less than 16.0 g / m 2 .

Description

Technical Field

[0001] This invention relates to a package of multiple rolls of toilet paper. Background Technology

[0002] Traditionally, toilet paper was sold in rolls, made by rolling strips of toilet paper into a single unit, and placed on a stand or similar fixture in the bathroom. These rolls had perforations spaced at predetermined intervals along their length, and the number of sheets that could be cut at these perforations was called the cut count, which served as a reference for the number of uses a user could make. While the cut count in conventional toilet paper rolls varied depending on the manufacturer, it was generally known to be between 120 and 240 cuts. It is also known that some products have perforation intervals set to about half that of 200-240 cuts, resulting in approximately 120 cuts, but the winding length remains roughly the same as products with 200-240 cuts.

[0003] In recent years, due to changes in people's lifestyles, there has been a demand for products with high storage and organization capabilities in daily necessities such as toilet paper rolls. Furthermore, due to restrictions on movement caused by the spread of COVID-19, the time spent at home has become longer, leading to a demand for longer-sized toilet paper rolls that increase the number of cuts or the length of the roll (e.g., Patent Document 1).

[0004] On the other hand, toilet paper rolls are commercially sold as a package containing 2 to 12 toilet paper rolls enclosed in a corner-supported packaging bag (e.g., Patent Document 2). It is well known that 10 toilet paper rolls are packaged together by joining their main bodies face to face.

[0005] Problems with traditional toilet paper roll packaging include: because toilet paper rolls are soft, they are difficult to tightly package with packaging film, which causes the toilet paper rolls to move or deform within the gusseted packaging.

[0006] Patent Document 1: Japanese Patent Application Publication No. 2018-61824

[0007] Patent Document 2: Japanese Patent Application Publication No. 2019-81602

[0008] However, if a tight packaging film is used to address this issue, the possibility of the film crushing the edges of the toilet paper rolls, particularly the end faces, increases.

[0009] Furthermore, if the toilet paper is simply forcefully wound around the tube to stiffen the roll in an attempt to eliminate this problem, the stretching of the toilet paper during winding can sometimes cause paper breaks at the perforation lines, a decrease in weight per unit area or paper thickness, and crushing due to embossing, resulting in a reduction in quality in terms of absorbency, smoothness, or thickness. While forcefully winding the toilet paper while maintaining the roll diameter can extend the aforementioned cut count or winding length, this is useful in that respect, but it presents a problem in ensuring quality.

[0010] The paper quality required for toilet paper is subject to a complex interrelationship of various physical properties. Therefore, it is not simply a matter of compromising between increasing the number of cuts or the winding length in the roll of toilet paper as desired by the consumer, and achieving a level of hardness in the package that prevents it from being crushed. Summary of the Invention

[0011] Therefore, the main objective of this invention is to provide a toilet paper roll packaging that improves the crushing of toilet paper rolls produced in conventional toilet paper roll packaging, increases the number of cuts and the winding length as desired by consumers, while having the same performance quality as conventional products and providing a sense of thickness.

[0012] The first solution to the above-mentioned problem is a roll toilet paper package, which is made by using a resin-based packaging film to corner-support the roll toilet paper. The roll toilet paper is formed by rolling toilet paper into a roll. Its characteristic is that...

[0013] The thickness of the packaging film is 40μm to 60μm.

[0014] Regarding the aforementioned toilet paper roll, the winding length is 34.9m to 55.1m, the number of cuts is 306 to 483, and the roll stiffness is 68N or higher and 92N or lower.

[0015] The toilet paper has a laminated structure consisting of three or more sheets stacked on top of each other, with each layer having a thickness exceeding 78 μm and less than 100 μm, and each layer having a basis weight exceeding 13.5 g / m³. 2 And less than 16.0 g / m 2 .

[0016] According to the second method, in the toilet paper roll package of the first method, wherein,

[0017] The sheet is formed by stacking one or more front-side sheets and one or more back-side sheets, wherein the sheet has a recess on one side and a protrusion corresponding to the recess on the other side.

[0018] Regarding the toilet paper, the convex surfaces of the sheet face each other in such a way that the convex portion of one sheet faces the non-convex portion of the other sheet, and the convex portion of the other sheet faces the non-convex portion of one sheet, so that the toilet paper has only concave portions formed on both sides.

[0019] According to the third method, in the toilet paper roll package of the first or second method, wherein,

[0020] In the toilet paper, the area of ​​the recesses exceeds 4936 mm² per sheet. 2 And less than 9872mm 2 The total area ratio of the concave portion on each side is over 44.2%.

[0021] According to the fourth method, in the toilet paper roll package of the first or second method, wherein,

[0022] The lateral liquid absorption height of the toilet paper is above 61mm / 100s.

[0023] According to the fifth method, in the toilet paper roll package of the first or second method, wherein,

[0024] The toilet paper has a dry tensile strength of 657 cN / 25 mm or more in the longitudinal direction and a dry tensile strength of 310 cN / 25 mm or more in the transverse direction.

[0025] According to the present invention, a roll toilet paper assembly package is provided, which achieves improvements in the crushing of roll toilet paper produced in the above-mentioned conventional roll toilet paper assembly packages, as well as an increase in the number of cuts and the winding length as desired by the consumer, while having the same performance quality as conventional products and being able to impart a sense of thickness. Attached Figure Description

[0026] Figure 1 This is a front view of the gusseted packaging used to illustrate embodiments of the present invention.

[0027] Figure 2 It is shown Figure 1 A schematic diagram of section II-II.

[0028] Figure 3 This is a perspective view of a roll toilet paper package according to an embodiment of the present invention.

[0029] Figure 4 This is a front view of a roll toilet paper package according to an embodiment of the present invention.

[0030] Figure 5 This is a side view of a roll toilet paper package according to an embodiment of the present invention.

[0031] Figure 6 This is a perspective view of a toilet paper roll according to an embodiment of the present invention.

[0032] Figure 7 This is a perspective view of a toilet paper roll according to an embodiment of the present invention.

[0033] Figure 8 This is a diagram illustrating an example of a design formed by the embossing process of the present invention.

[0034] Figure 9 This is a cross-sectional view used to illustrate the recess achieved by the embossing process of the present invention.

[0035] Figure 10 This is a schematic diagram illustrating the embossing process of the present invention.

[0036] Figure 11 This is a diagram showing an example of the lamination of the sheet material constituting the toilet paper of the present invention.

[0037] Figure 12 This is a diagram showing an example of the lamination of the sheet material constituting the toilet paper of the present invention.

[0038] Figure 13 This is a schematic diagram illustrating the method for measuring the MMD of the surface of the toilet paper according to the present invention. Detailed Implementation

[0039] Next, refer to the following Figures 1 to 13 A detailed description of an embodiment of the toilet paper roll packaging body 1 of the present invention will be provided. However, the present invention is not limited to the shape and embodiment shown in the figure. Within the scope of the present invention, the detailed shape, position, etc., of each part can be modified without affecting the effects of the present invention.

[0040] The toilet paper roll package 1 of this embodiment (hereinafter also referred to as "package 1") is formed by wrapping a roll of toilet paper 10, which is made by winding a strip of toilet paper 11 around a paper tube 12 to form a roll, with a resin packaging film 20 used for corner bracing. In the corner bracing packaging shown in the figure, the sides 20e, 20e of the cylindrical packaging film 20 are folded inward into the bag and flattened, especially the top side, which is welded together. The side 20e is opened to form a support 21, and the part that is lower than the bottom of the welded part 22 becomes the bag body 20A, in which the toilet paper roll 10 is housed. In addition, the part of the welded part 22 that is higher than the bottom becomes a handle 24 with a finger hook hole 23. On the other hand, the bottom is also sealed by welding, just like the top, to form a bottom surface 20L with a sealing part 51. Furthermore, hereinafter, the surface connected to the handle portion 24 among the surfaces connected to the expansion portion 21 will be referred to as the top surface 20T, one of the two surfaces connected to the top surface 20T and each expansion portion 21 will be referred to as the front surface 20F, and the other surface will be referred to as the back surface 20B. However, the front surface 20F and the back surface 20B are relative, and it is not limited to which surface is designated as the front surface.

[0041] For the purposes of explanation below, the direction connecting the top surface 20T and the bottom surface 20L of the toilet paper roll packaging 1 will be referred to as the height direction, the direction connecting the opening portion 21 on one side and the opening portion 21 on the other side will be referred to as the width direction, and the direction connecting the front side 20F and the back side 20B will be referred to as the depth direction.

[0042] The handle portion 24 of the present invention is preferably formed by arranging the linear welded portions 22 in a grid pattern, as shown in the figure. This method prevents accidental opening and results in a handle portion 24 with high rigidity. However, the shape and location of the welded portions 22 are not limited in the present invention. Furthermore, the welded portions 22 can be formed using thermal welding or ultrasonic welding. There are no limitations as long as the top side can be sealed. In the illustrated embodiment, finger hook holes 23 are formed at two locations, particularly in the central part of the handle portion 24 in the width direction, but the shape, position, and number of finger hook holes 23 are not limited. These structures of the gusseted packaging are not limited to the illustrated embodiment; known gusseted packaging structures can be used without impairing the effects of the present invention.

[0043] On the other hand, the arrangement of the toilet paper rolls 10 within the package 1 of the present invention is preferably such that two or more rows of toilet paper rolls 10 are arranged with each end face 13 facing the depth direction and the circumferential surfaces 14 joined together. Specifically, regarding this preferred arrangement, as follows... Figures 3-5As shown, the following configurations can be listed: six rolls of toilet paper 10 are arranged with each end face 13 facing the depth direction, and two rolls are arranged in the width direction and three in the height direction, with their peripheral surfaces 14 joined together; and ten rolls of toilet paper 10 are arranged with each end face 13 facing the depth direction, and two rolls are arranged in the width direction and five in the height direction, with their peripheral surfaces 14 joined together. Furthermore, in the illustrated configuration, the rolls of toilet paper 10 are arranged in one layer in the depth direction, but it is also possible to arrange six rolls with their peripheral surfaces 14 joined together and two layers with their end faces 13 joined together, for a total of twelve rolls. In these configurations, by aligning the end faces 13 of the rolls of toilet paper 10 with the depth direction, when displaying the bundled package 1 on a display shelf, the back surface 20B can be arranged along the stepped surface of the shelf, and multiple bundled packages 1 can be placed in the depth direction. With this configuration, the axial direction of the paper tube of the toilet paper roll 10 inside the package 1 is along the depth direction of the package 1. Therefore, even if the package 1 is stacked in an overlapping manner, the toilet paper roll 10 is not easily crushed. If the package 1 is a membrane or the like that allows the contents to pass through, the user can easily visually confirm the circumferential surface 14 of the toilet paper roll 10 inside, which is preferred.

[0044] In particular, in the gusseted packaging, when gripping the handle 24, a force is applied to bring the front 20F and the back 20B closer together, but... Figures 3-5 In the arrangement of the toilet paper rolls 10 shown, since there is only one toilet paper roll 10 between the front 20F and the back 20B, the toilet paper rolls 10 will not be squeezed against each other, which is particularly preferable in terms of shape retention. However, the arrangement of the toilet paper rolls 10 in the package 1 of the present invention is not necessarily limited to these arrangements. For example, they can also be packaged with each end face 13 facing the top and bottom direction and multiple rolls stacked in the height direction with their circumferential surfaces touching the ground.

[0045] The type of resin-based packaging film 20 of the present invention is not limited. Examples include polyethylene film, polypropylene film, polyester film, polyethylene terephthalate film, nylon film, vinylidene chloride film, single-layer film of ethylene-vinyl alcohol copolymer, or laminated film composed of suitable layers of these films, and gas-barrier film formed by surface treatment such as aluminum vapor deposition on these films. Alternatively, biomass films from plant materials such as sugarcane, potato (starch), and corn can also be used. From an environmental protection point of view, the use of such biomass films is preferred. In particular, polypropylene film and polyethylene film are suitable from the perspectives of low cost, excellent weldability, and moderate elongation, which facilitates the proper and tight packaging of toilet paper rolls 10 when manufacturing the corner brace packaging of the present invention. Additionally, the packaging film 20 can also be a pear-skin film with excellent design and feel. The melting point of the film is preferably below 150°C. It should be noted that the lower the melting point of the packaging film, the more suitable it is for low-temperature heat welding, but the practical lower limit is 80°C. As for polypropylene, examples include unstretched polypropylene film (CPP), and as for polyethylene film, examples include linear low-density polyethylene film (LLDPE), low-density polyethylene film (LDPE), and medium-density polyethylene film (MDPE).

[0046] On the other hand, the thickness of the resin-made packaging film 20 of the assembly packaging body 1 is 40μm to 60μm. If the film thickness is within this range, it is easy to weld the films together to form a gusseted package. Furthermore, combined with the structure of the toilet paper roll 10 described later, it particularly solves the problems of deformation and crushing of the toilet paper roll 10. Additionally, the preferred packaging film has the following characteristics: a softness of 162mN or more and 252mN or less, a tensile strength (breaking strength) of 11N or more and 18N or less, and a tensile elongation (breaking elongation) of 632% or more and 921% or less. With this packaging film, especially when forming gusseted packages, the problems of deformation and crushing of the toilet paper roll 10 are improved. Here, the softness is measured according to JAPAN TAPPI NO.34 using a manual instrument. The sample size is 100mm × 100mm, and the slit width of the manual instrument is 5mm (±0.5mm). Ten measurements were taken 10 times in both the longitudinal and transverse directions of the membrane, with five measurements taken on each of the front and back sides. The measured values ​​were the average of the longitudinal and transverse measurements. Tensile strength (breaking strength) and tensile elongation (breaking elongation) were measured according to ISO 527-3:2012 (JIS K 7127:1999) using a tensile testing machine, such as a benchtop precision universal testing machine (SHIMADZU AG-X plus) or equivalent equipment. If using software, material testing software (TARPEZIUM LITE X) or equivalent software could be used. The test specimen was 10 mm × 120 mm in size, with a chuck spacing of 50 mm, and a tensile speed of 500 mm / min in the longitudinal direction. Five measurements were taken in both the longitudinal and transverse directions, and the average value was recorded.

[0047] In the package 1 of the present invention, it is particularly preferred that the distance L1 from the uppermost position of the top surface of the stored toilet paper roll 10 to the welded portion 22 is 18% to 43% of the diameter of the toilet paper roll 10. As a specific value, it is preferably set to 22 mm to 52 mm. If it is within this range, combined with the configuration of the toilet paper roll 10 described later, the edge of the end face 13 of the toilet paper roll 10 is less likely to be crushed when the handle portion 24 is lifted.

[0048] In the package 1, a tear 50 can be provided to facilitate the removal of the packaged toilet paper roll by opening the packaging film. The tear 50 can be provided, for example, on the top surface 20T of the package 1, which is connected to the front side 20F or the back side 20B. Specifically, the tear 50 can be located at the center of the width direction of the top surface 20T. When removing the toilet paper roll, the tear 50 is opened, and while pinching the free end of the tear 50 by hand, force is applied downwards in the height direction, thereby tearing the package 1.

[0049] The split portion 50 can be formed by a linear slit with a split pattern. For example, the split portion 50 can also be a linear slit with an inverted U-shaped or arc-shaped split pattern at the lower end, or a linear slit with a curved split pattern.

[0050] The shape of the slit-like linear opening is not particularly limited; for example, it can be a perforated line formed by alternating and continuous arrangement of cut portions and connecting portions (uncut portions between cut portions). In this embodiment, the opening 50 is formed by the perforated line, and the opening 50 is formed by breaking the perforated line.

[0051] Furthermore, when the linear slit forming the crack pattern of the cracked portion 50 is a perforated line, the ratio of the cut portion to the connecting portion of the perforated line (connection-cut ratio) can be set to any value, for example, it can be set to 0.2 to 2.0, preferably 0.25 to 1.5, and more preferably 0.3 to 1.25.

[0052] On the other hand, regarding the roll of toilet paper 10 stored within the package 1 of the present invention, specifically, as Figure 6 As shown, it is made by winding a strip of toilet paper 11 onto a paper tube 12. Particularly preferred are a winding length of 34.9–55.1 m, a cut count of 306–483 cuts, and a roll stiffness of 68 N or more and 92 N or less. With such a winding length, cut count, and roll stiffness, approximately 1.5–3.0 times the yield of conventional products with 120–240 cuts can be achieved, resulting in a product that is considered superior in terms of storage and reusability by the consumer. Furthermore, the edges of the end face of the toilet paper roll 10 are less likely to be crushed when the consumer holds the handle 24 of the packaging film 20. The cut count refers to the number of sheets cut through the perforation lines. Cutting refers to the state where perforation lines of a slit pattern are arranged at predetermined intervals in a direction perpendicular to the manufacturing direction (MD direction) of the toilet paper 11. This interval (distance between cuts) is 11 mm–25 mm, preferably 15 mm–20 mm.

[0053] On the other hand, preferably, the toilet paper 11 forming the roll of toilet paper 10 has a laminated structure consisting of three or more sheets stacked on top of each other, with a paper thickness exceeding 78 μm and less than 100 μm, and the basis weight of each layer exceeding 13.5 g / m³. 2 And less than 16.0 g / m 2 .

[0054] Furthermore, the perforation line strength is preferably 485–985 cN / 100 mm. This facilitates cutting during use, thereby easily achieving the roll stiffness of the present invention. It should be noted that the perforation line strength is measured according to the dry tensile strength measurement method based on JIS P 8113 (2006). Specifically, regarding the test piece, a test piece cut to approximately 25 mm (±0.5 mm) wide × 150 mm long is used, with a perforation line approximately at the center of the length direction. Measurements are performed directly on multiple test pieces. For the testing machine, a force sensor tensile testing machine TG-200N manufactured by Minebea Co., Ltd., or an equivalent device, is used. The test specimen is set with an 80 mm clamping interval and with the perforation line centered. The tensile speed is set to 100 mm / min. The measurement is performed in the following sequence: the two ends of the test piece are secured to the clamps of the testing machine; a tensile load is applied to the paper in the vertical direction; and the indicator value at which the perforation line breaks is read (in numerical terms, it is the numerical value). Five measurements were performed, and the average value of the measurements was taken as the perforation wire strength.

[0055] The size of the toilet paper roll 10 of the present invention is not necessarily limited, but is preferably: height (width) L2 is 98-101 mm, diameter (roll diameter) L3 is 118-122 mm, and inner diameter (core diameter) L4 is 36-40 mm. This easily solves the problems of toilet paper roll crushing and paper quality. It should be noted that the diameter is a value measured using a diameter gauge manufactured by Mura Tech KDS Co., Ltd. or an equivalent device.

[0056] In particular, the toilet paper roll 10 of the present invention, based on the structure of the toilet paper roll 11 of the present invention, has a roll stiffness of 68N or more and 92N or less. If the roll stiffness falls within this range, it is possible to improve the crushing of the toilet paper rolls that occurs in conventional toilet paper roll packaging, thereby enabling the production of toilet paper rolls with performance qualities equivalent to conventional products. Here, the roll stiffness involved in the present invention refers to a value such that the force required to subtract three graduations from the Π regular scale is measured by winding a measuring gauge (manufactured by Mura TechKDS Co., Ltd.) or an equivalent instrument circumferentially around the center portion between the end faces of the toilet paper roll, using a push-pull force gauge (manufactured by IMADA Co., Ltd.) or an equivalent device.

[0057] The toilet paper 11 of the present invention preferably has a dry tensile strength of 657 cN / 25 mm or more in the longitudinal direction, more preferably 657 to 726 cN / 25 mm, and a dry tensile strength of 310 cN / 25 mm or more in the transverse direction, more preferably 310 to 348 cN / 25 mm. If the dry tensile strength is within the above range, paper breakage is less likely to occur during manufacturing, and it is less likely to tear in an unexpected direction during use.

[0058] Regarding the toilet paper 11 of the present invention, it is preferable that the MMD of the surface of the front side sheet, described later, is 9.7 or less. Considering the skin feel caused by the recesses, a more preferred MMD value is 8.9 to 9.4. For MMD, using... Figure 13 The measuring apparatus 100 shown involves contacting the contact surface of a friction element with the surface of a test specimen subjected to a tension of 20 g / cm in a specified direction using a contact pressure of 25 g. Simultaneously, the contact surface of the friction element is moved 2 cm at a speed of 0.1 cm / s in a direction approximately the same as the direction of the applied tension. The coefficient of friction is measured using a friction tester KES-SE (manufactured by KATO TECH Co., Ltd.) or an equivalent device. The coefficient of friction divided by the friction distance (movement distance = 2 cm) yields the value MMD. The friction element is formed by adjacent 20 piano wires P with a diameter of 0.5 mm, and has a contact surface formed with a length and width of 10 mm. A unit bulge is formed on the contact surface, with the ends of the 20 piano wires P (with a radius of curvature of 0.25 mm).

[0059] On the other hand, the absorbency of the toilet paper 11 of the present invention is 63 to 91 mm / 100 seconds, preferably 70 to 85 mm / 100 seconds. If the absorbency of the toilet paper 11 of the present invention is within this range, it can be said to have a high absorbency not found in existing products, while also ensuring hydrolysis resistance, allowing for safe use. The absorbency was measured according to JIS-P-8141. The sample was set to be 15 mm wide and 200 mm long or more according to JIS-P-8141. However, regarding the measurement time, JIS-P-8141 specifies 10 minutes. Therefore, the absorbency of this toilet paper was measured within 100 seconds and the distance of penetration after 100 seconds. This is because toilet paper has high hydrolysis resistance; sometimes, after 10 minutes of soaking, hydrolysis occurs and the measurement becomes impossible. Furthermore, in actual use of toilet paper, the absorbency in a time significantly shorter than 10 minutes, specifically at most about 100 seconds, becomes important. Furthermore, the absorbency of creases within a short period of 100 seconds is also affected by the unevenness of the embossing process. Specifically, since fiber density varies depending on the vibrancy and depth of the embossing, the absorbency of creases varies over a short period of time.

[0060] On the other hand, in the toilet paper 11 of the present invention, the thickness of each layer is greater than 78 μm and less than 100 μm, and the basis weight of each sheet 30 (each layer) is greater than 13.5 g / m². 2 And less than 16.0 g / m 2g. By setting the paper thickness and basis weight within the aforementioned range, it is possible to produce toilet paper 11 with a moderate stiffness of the sheet 30 itself, improved crushing resistance in the thickness direction of the toilet paper 11, increased cutting count and winding length, and performance comparable to conventional products. This allows for the production of a package 1 of toilet paper rolls that is less prone to crushing. In particular, within this range of paper thickness and basis weight, the effects of the invention are more appropriately manifested by using the aforementioned preferred embossed recess 31 or laminated structure. The basis weight is measured using the basis weight measurement method of JIS P 8124 (1998). For paper thickness, after the test sheets are fully conditioned (usually for about 8 hours) under JIS 8111 (1998) conditions, the thickness is measured under the same conditions using a dial-type thickness gauge (thickness measuring instrument) "PEACOCK G type" (manufactured by Ozaki Corporation) in a two-sheet configuration. Specifically, after confirming that there is no debris or dust between the plunger and the measuring stage, the plunger is placed on the measuring stage, causing the scale of the dial-type thickness gauge to move and align with the zero point. Then, the plunger is lifted, the sample is placed on the test stage, and the plunger is slowly lowered, at which point the gauge reading is taken. During measurement, only the plunger is placed without pressing it. The plunger terminal is made of metal, and its 10mm diameter circular surface is in perpendicular contact with the paper plane. It should be noted that the paper thickness is the average value obtained from 10 measurements. Here, the crushing of the embossing (recesses) is considered when measuring paper thickness, but the paper thickness of this invention also includes such crushing and can be ignored. In this paper thickness measurement, the difference in paper thickness caused by the crushing of the recesses can be ignored.

[0061] The toilet paper 11 of the present invention has a stacked structure consisting of 3 or more sheets, preferably 3 to 5 sheets. Here, in the toilet paper 11 wound around the paper tube 12 in the roll toilet paper 10, the side facing the paper tube 12 is called the back side, and the side opposite it is called the front side. Furthermore, in the stacked sheets constituting the toilet paper 11, the sheet closest to the paper tube 12 is called the back side sheet 30c, and the sheet furthest from the paper tube 12 is called the front side sheet 30a. An intermediate sheet 30b may or may not be provided between the front side sheet 30a and the back side sheet 30c. Moreover, the front side sheet 30a, the intermediate sheet 30b, and the back side sheet 30c are each composed of one or more sheets.

[0062] Here, as Figure 8 and Figure 9As shown, the toilet paper 11 of the present invention has a laminated structure formed by stacking front side sheet 30a and back side sheet 30c with concave and convex surfaces through embossing. With a laminated structure formed by stacking sheets with concave and convex surfaces through embossing, gaps are formed between the sheets, improving absorbency and wiping properties, thus enhancing the convenience of the toilet paper 11. Furthermore, when the toilet paper 10Y is manufactured into a roll and then stored in a packaging film as a packaged unit of the present invention, combined with other structures, appropriate roll stiffness and end edge stiffness can be ensured, achieving improved crushing resistance and increased cutting count and winding length of the toilet paper 10 while maintaining the same performance quality as conventional products.

[0063] Next, the specific design of the embossing on the toilet paper 11, which has a stacked structure consisting of three or more sheets, will be described. Regarding the application of embossing, it is preferable to apply a laminated embossing as follows: in combination with the characteristic layer structure of the toilet paper 11 of the present invention, recesses 31 (also referred to as macro embossing) and dot embossing 35 are applied to the front side sheet 30a, and micro embossing (not shown) is applied to the back side sheet 30c.

[0064] Here, micro-embossing refers to fine embossing patterns dispersed across roughly the entire paper surface, with each vertex having an area of ​​1.31–1.33 mm². 2 The area of ​​each vertex of the dot-embossed 35 is 0.26–0.28 mm². 2 The recess 31 refers to a line with a width of 0.50–1.0 mm and an area of ​​1.31–1.33 mm². 2 A concave portion formed on at least one of the faces.

[0065] It should be noted that the area of ​​the recess 31 can be measured, for example, using a OneShot 3D measuring microscope VR-3200 or equivalent equipment manufactured by KEYENCE Co., Ltd., and image analysis software "VR-H1A" or equivalent software. The measurement is performed at a magnification of 12x and a field of view area of ​​24mm × 18mm. However, the magnification and field of view area can be appropriately changed depending on the size of the embossing (recess). Regarding the specific measurement steps, using the aforementioned software, an embossing (recess) 31 whose outline is clearly displayed as measurable from the image section represented by a planar viewpoint is visually selected, and the area inside the outline is measured. Under the basis weight and winding length of the toilet paper of the present invention, it is possible to form a state in which the recess 31 transferred to the sheet is maintained without excessive distortion.

[0066] In the toilet paper 11 of the present invention, the depth of the recess 31 formed on the front side sheet 30a by embossing is not necessarily limited. Preferably, the sheet is embossed using an embossing roller with a height of 0.90 mm to 1.40 mm for forming the recess 31 on the sheet 30 to create a laminated structure, thereby adjusting the paper thickness to the range of the toilet paper 11 of the present invention. In this case, the paper thickness of the portion of the sheet 30 without the recess 31 is approximately 78 μm to 82 μm. Furthermore, the method for measuring the paper thickness of this sheet is the same as the method for measuring the paper thickness of the toilet paper 11.

[0067] The arrangement of the recesses 31 and dot embossing 35 on the front side sheet 30a when viewed from above can be appropriately selected. An example is... Figure 8 As shown. In Figure 8 In the example, the recesses 31 on the front side sheet 30a are configured to intermittently arrange the surfaces into lines, forming an overall curved grid pattern and a petal-like design, with dot embossing 35 disposed within the curved grid based on the aforementioned recesses. However, the pattern design based on the embossing is not limited in this invention. Suitable patterns can be formed by considering design possibilities. Furthermore, although not shown, the micro-embossing on the back side sheet 30c is applied in a manner that disperses throughout the paper surface.

[0068] In the toilet paper 11 of the present invention, the shape of each embossed pattern is not limited. It can be a suitable shape such as a rectangle, a circle, or an oval. Multiple shapes can also be mixed together. It is preferred to have a shape without corners, such as an oval or a circle, and a circle is particularly preferred.

[0069] The toilet paper 11 is made soft and has a smooth surface due to the presence of micro-embossing. Furthermore, the toilet paper 11 has increased fluffiness and design due to the presence of recesses 31, 31… Furthermore, the toilet paper 11 has thickness and absorbency due to the presence of dot embossing 35, 36… In addition, the recesses 31, 31… are used to wipe away large soilings (soil that is not wiped away by the recesses 31, 31…), the dot embossing 35, 35… is used to wipe away medium soilings (soil that is not wiped away by the recesses 31, 31…), and the micro-embossing is used to wipe away small soilings (soil that is not wiped away by the recesses 31, 31… and the dot embossing 35, 35…). Therefore, by providing the above-mentioned embossing, no wiping residue is produced due to the user's wiping operation.

[0070] On the other hand, the toilet paper 11 of the present invention can be manufactured in the following form: an intermediate sheet 30b is provided between the front side sheet 30a and the back side sheet 30c, and there is no embossing on the intermediate sheet 30b. In this form, the distance between the intermediate sheet 30b and the front and back side sheets 30a and 30c is not excessive, and water or dirt absorbed by the front and back side sheets 30a and 30c can be easily transferred to the intermediate sheet 30b, thus maximizing its absorbency.

[0071] Furthermore, in the toilet paper 11 of this method, the total area of ​​the vertex portions (recesses) of the dot embossing 35, 36... and the lines and surfaces of the recesses 31, 31... is greater than that of the toilet paper per 100 mm. 2 The diameter is 49.4–98.7 mm. 2 The preferred diameter is 61.1–98.7 mm. 2 More preferably, it is 69.8–98.7 mm. 2 If it falls within this range, a sufficient volume can be obtained stably, and the absorbency is excellent. The paper penetration does not become shallow relative to the depth of embossing, resulting in a toilet paper with a thick feel.

[0072] Furthermore, the total area ratio of the outer side (the side not facing the front side sheet 30a) of the back side sheet 30c to the vertex portion (recess) of the micro-embossing is 88.4% to 95.3%, preferably 93.1% to 95.3%. If this total area ratio is within the above range, sufficient softness and smoothness can be obtained, and paper separation is less likely to occur. To prevent paper separation, the sheets can be bonded together at the vertex portion of the micro-embossing; if it is within the above range, the softness of the paper will not be compromised.

[0073] On the other hand, in this toilet paper 11, the recess 31 can be a nested double embossed pattern. For example... Figure 9 As shown, the toilet paper 11 preferably has the following laminated structure: a recess 31 is formed on one side of each sheet 30, and a protrusion 32 corresponding to the recess 31 is formed on the other side. The protrusion 32 of one sheet 30 faces the portion of another sheet 30 where no protrusion 32 is formed, and the protrusion 32 of the other sheet 30 faces the portion of one sheet 30 where no protrusion 32 is formed. The protrusion-forming surfaces of the sheets 30 face each other, so that only recesses 31 are formed on both sides. Compared with a laminated structure where the protrusions of each sheet face each other, the number of protrusions 32 between the sheets can be increased, thus shortening the distance between the sheets and reducing the paper thickness. On the other hand, by providing the protrusions 32, the toilet paper 11 is less likely to be crushed in the thickness direction. Even if the roll stiffness is increased, it is less likely to be crushed in the thickness direction, which easily improves the crushing resistance of the toilet paper roll 10 and easily ensures the same performance and quality as conventional products.

[0074] In this laminated structure, the area of ​​one of the recesses 31, 31... formed in each sheet 30 is preferably greater than 4.936 mm². 2 And less than 9.872mm 2 The area of ​​any 10 recesses 31 is measured, and their average value is taken as the final area of ​​the recesses. If the area of ​​a recess 31 is within the aforementioned range, the absorbency and ease of wiping become excellent. Furthermore, since a sufficient number of protrusions are provided between the sheets, it is particularly excellent in improving the crushing resistance of the toilet paper roll 10. It should be noted that the upper limit of the total area ratio of the recesses 31 is not necessarily limited, and is at most 88.4%, preferably 79.5%, and particularly preferably 70.7%. If it is within this range, the balance between the portion whose rigidity is improved by forming the recesses 31 through embossing and the portion whose rigidity is not improved by not forming the recesses 31 becomes good. In addition, the total area ratio of the recesses 31 refers to the percentage of the total area of ​​the recesses 31 in the unit area of ​​the toilet paper.

[0075] Next, refer to Figure 10 The above-mentioned embossing method will be explained. Figure 10 An example of applying raised or recessed texture to the front side sheet 30a and the back side sheet 30c is shown. However, this method is not limited to. In embossing, the raised or recessed texture in a laminated sheet composed of three or more sheets of toilet paper 11 is particularly preferably formed by embossing based on a steel-rubber method. Figure 10 As shown, in the steel-rubber method, each sheet is given an embossing pattern based on embossing by passing between a metal embossing roller 41, which has multiple embossed protrusions on its surface corresponding to the embossing shape and pattern, and a receiving roller 42, whose surface is made of elastic material, receiving the embossing roller 41. Furthermore, in particular, to achieve the aforementioned nested configuration, embossed patterns are formed on the front side sheet 30a and the back side sheet 30c, and the sheets are stacked on top of each other with the protrusions facing each other and staggered in position. The stacked sheets formed in this process become toilet paper 11. Afterwards, they are wound into a long paper tube to form a narrow toilet paper roll.

[0076] In the case where an intermediate sheet 30b is used in addition to the front side sheet 30a and the back side sheet 30c, for example, the front side sheet 30a and the intermediate sheet 30b can be pre-laminated to manufacture a laminated sheet, and embossing based patterns can be formed on the laminated sheet and the back side sheet 30c.

[0077] It should be noted that when the sheet 30 is given not only recesses 31 but also dot-shaped embossing 35, a metal embossing roller capable of giving both recesses and dots can be used.

[0078] Preferably, the laminated sheets 30 are bonded together separately using an adhesive. In the case of a laminated sheet composed of a front-side sheet 30a and a back-side sheet 30c, specifically, the adhesive can be applied to the entire surface of the opposing sides of one or two sheets 30, 30, and the sheets are bonded together at the embossed protrusions 32. Alternatively, the adhesive can be applied to the top of the embossed protrusions 32 of one or two sheets 30, 30, and the sheets are bonded together at the protrusions 32. In this case, it is also possible to apply the adhesive only to a portion of the protrusions 32, rather than all of them, and bond the front-side sheet 30a and the back-side sheet 30c together using the adhesive applied to the top of the portion of the protrusions 32. To apply the adhesive, especially to the top of the protrusions, for example, as... Figure 10 As shown, an adhesive is applied to the front side sheet 30a and the back side sheet 30c, which are conveyed while wound on an embossing roller, using an adhesive device 43. By bonding the sheets together, the sheets are less likely to shift, the protrusions 32 between the sheets are less likely to be crushed, and the absorbency and wiping properties achieved by the recesses 31 based on the embossing process are excellent. Furthermore, due to the increased rigidity, they are less likely to be crushed in the thickness direction, thus providing particularly good improvement in the crushing of the toilet paper roll 10.

[0079] Regarding the adhesive of the present invention, known adhesives used in toilet paper 11 with a laminated structure can be used. Examples of such adhesives include hot melt adhesives, polyvinyl alcohol adhesives, starch adhesives, modified starch adhesives, carboxymethyl cellulose adhesives, etc. Hot melt adhesives are preferred in toilet paper 11 of the present invention, and are particularly preferred when a nested laminated structure is formed. Hot melt adhesives do not impair softness or flexibility, can improve the rigidity of the protrusions 32, and easily prevent crushing between sheets. In addition, with hot melt adhesives, the unevenness can be formed while the adhesive is melting, so it is easy to maintain the uneven shape deformed by embossing. Thus, since the shape of the unevenness is well maintained while maintaining flexibility or softness, it is particularly easy to make it difficult to crush, especially when the quality is made the same as conventional without reducing absorbency, etc., while the roll stiffness is increased and packaged with film. Especially when using this hot melt adhesive, its concentration is 1.1% to 2.5% by mass, preferably 1.5% to 2.0% by mass, which easily brings out the advantages of the hot melt adhesive mentioned above.

[0080] It should be noted that, for example, in the toilet paper 11 of the present invention, it can be set as follows: Figure 11The structure shown, consisting of a single-layer (1 piece) middle sheet 30b, two layers (2 pieces) of front side sheets 30a, and a single layer (2 pieces) of back side sheets 30c, totaling four layers (5 pieces), can also be configured as a stacked structure of 3 to 6 pieces. Figure 12 In (A) to (E), stacked structures of 4 to 6 sheets are illustrated. Regarding embossing, it can be set to various forms in which a recess 31 is given to the front side sheet 30a, no embossing is given to the middle sheet 30b, and micro-embossing is given to the back side sheet 30c and they are stacked together. Alternatively, nested embossing can be given to all sheets of the front side sheet 30a, the middle sheet 30b, and the back side sheet 30c.

[0081] On the other hand, regarding the toilet paper 11 of the present invention, it is preferable that the transverse absorbent height is 73 mm / 100s or more. The transverse absorbent height is an indicator of the absorbency of the toilet paper 11. If it is 73 mm / 100s or more, it can be said to have absorbency equivalent to conventional toilet paper 11, and it can be said that it is no worse than conventional toilet paper in terms of quality, especially in terms of absorbency. Here, the transverse absorbency is measured as follows: The toilet paper is cut into samples with a length of 250 mm or more and a width of 15 mm ± 1 mm. Five samples are prepared. For the testing machine, an absorbency measuring instrument (model: XSY-200, manufactured by Hangzhou Qingtong Boke Automation Technology Co., Ltd.) or equivalent equipment is used. Ionized water is placed in the absorbent tank of the testing machine. The water level is set to reach the partition plate in the middle of the absorbent tank. The handle of the testing machine is lowered, and after confirming a "click" sound, the standard gauges are inserted into the ionized water to confirm that the insertion height of the five gauges of the testing machine is 5 mm. If the insertion heights of the five gauges are different, adjust the height of the screws on the device to make the gauge heights consistent. Next, lift the handle of the testing machine and clamp the sample into the water absorption measuring device for setup. At this point, align the top of the sample with the top of the gauge. Then, slowly lower the handle of the testing machine, vertically inserting the sample to a position 5mm above the deionized water. Simultaneously, use a stopwatch to measure for 100 seconds. After 100 seconds, visually read the height of the absorbed liquid and record it in 1mm increments.

[0082] On the other hand, the softness of the toilet paper 11 of the present invention can be 73 to 94 mN, preferably 61 to 90 mN. If the softness is within the above range, the end face of the toilet paper roll 10 made of the toilet paper 11 is not easily crushed, and the wiping performance of the toilet paper 11 is excellent when used to gently wipe the hands. The softness was measured according to JAPAN TAPPI NO.34 using a manual instrument. The sample size was 100 mm × 100 mm, and the slit width of the manual instrument was 5 mm (±0.5 mm). Ten measurements were taken in both the longitudinal and transverse directions of the film, with five measurements taken on each side. The measured value is the average value in both the longitudinal and transverse directions.

[0083] On the other hand, regarding the toilet paper 11 of the present invention, it is preferable that the longitudinal wet tensile strength is 40 cN / 25 mm or more, and the transverse wet tensile strength is 20 cN / 25 mm or more. Sufficient strength and a firm feel can be obtained during use. In particular, it is possible to ensure the same level of strength and firmness during use as conventional toilet paper models. Furthermore, it is easy to adjust to a suitable roll stiffness when forming the roll. The longitudinal direction of the paper, also referred to as the MD direction, is the flow direction during papermaking. The transverse direction of the paper, also referred to as the CD direction, is the direction orthogonal to the flow direction during papermaking (MD direction). The wet tensile strength of the present invention is measured based on the value measured according to JIS P 8135 (1998), as follows: For the test piece, a test piece cut to a width of 25 mm (±0.5 mm) in both the longitudinal and transverse directions is used. For the testing machine, a force sensor tensile testing machine TG-200N manufactured by Minebea Co., Ltd., or an equivalent device, is used. Additionally, the clamping interval was set to 80 mm, and the tensile speed was set to 100 mm / min. For the test pieces, those dried in a dryer at 105°C for 10 minutes were used. Measurements were performed as follows: After securing both ends of the test piece to the clamps of the testing machine, a horizontal line approximately 10 mm wide was drawn across the center of the test piece using a water-filled brush. Immediately afterwards, a tensile load was applied to the paper in the vertical direction, and the reading at the point of paper breakage (numerical value) was recorded. Five sets of samples were prepared and measured five times; the average of these measurements was taken as the wet tensile strength.

[0084] On the other hand, the constituent fibers of the toilet paper 11 of the present invention are not necessarily limited, but are preferably 100% by mass pulp. In particular, when the pulp is 100% by mass, it is especially preferable that it is composed of pulp derived from coniferous trees (also called N-material) and pulp derived from broadleaf trees (also called L-material). In this case, the ratio of N-material to L-material is preferably L-material: 0% to 50%, N-material: 100% to 50%. Examples of pulp derived from coniferous trees (N-material) include NOKP (coniferous kraft pulp) and NBKP (coniferous bleached pulp). Examples of pulp derived from broadleaf trees (L-material) include LOKP (broadleaf kraft pulp) and LBKP (broadleaf bleached pulp).

[0085] In particular, the constituent fibers of the toilet paper 11 of the present invention preferably include LBKP and NBKP. If the ratio of LBKP to NBKP is 65:35 to 80:20, the periphery of the end face will be hardened and not easily crushed when the toilet paper 11 is wound to form a roll of toilet paper 10.

[0086] In particular, regarding the toilet paper 11 of the present invention, it is preferable that at least 10% by mass of the constituent fibers are oxygen-cooked and chlorine-bleached softwood kraft pulp. Ideally, at least 35% by mass, and particularly preferably substantially 100% by mass free of impurities, are oxygen-cooked and chlorine-bleached softwood kraft pulp. More specifically, this softwood kraft pulp, also known as NOKP, is manufactured by continuous oxygen cooking in a continuous digester, and particularly by subsequent bleaching using chlorine-based bleaching agents. Here, in the KP (kraft pulp) used for toilet paper, there is bleached KP and unbleached KP, with the unbleached KP containing a large amount of lignin. Although the NOKP is not bleached using chlorine-based bleaching agents, it undergoes oxygen cooking (oxygen deligninization), thus removing about half of the lignin. It should be noted that the chlorine-based bleaching agents include not only chlorine but also chlorine dioxide and sodium hypochlorite. Therefore, ECF pulp is not the coniferous kraft pulp described above in this invention.

[0087] In this preferred toilet paper 11, at least 10% by mass (preferably 20% to 35% by mass or more) of coniferous kraft pulp that has been bleached using chlorine-based bleaching agents and subjected to delignification treatment based on oxygen cooking is included. That is, because this coniferous kraft pulp is used as the main fiber raw material, and especially as the sole fiber raw material, it provides reassurance to the human body during use and is environmentally friendly. It should be noted that toilet paper containing at least 35% by mass of bleached coniferous kraft pulp is white, easily creating a clean impression even in appearance, and also has a soft feel, thus giving buyers great peace of mind.

[0088] On the other hand, NOKP reduces lignin by about half compared to before oxygen cooking through oxygen-based delignification. Therefore, compared to pulp that has not undergone any delignification treatment, it is easier to exhibit softness and achieve strong strength. In addition, because it is derived from coniferous trees, the fibers are longer than those derived from broad-leaved trees, thus reducing the generation of paper dust. Combined with the lignin-based effect of preventing fiber densification, the cushioning properties are excellent.

[0089] Other fiber compositions besides NOKP are not necessarily limited, but the following aspects are preferred: a white appearance for a sense of cleanliness, a bright color that complements excrement to provide the user with a sense of health, and a feeling of reassurance. Oxygen-cooked and / or chlorine-bleached hardwood kraft pulp (LOKP) is preferred. Other virgin pulps or waste paper pulp may also be used.

[0090] The toilet paper 11 of the present invention preferably contains pulp fibers that are not unbeaten. The degree of beating of the papermaking raw material during manufacturing is not limited, but it is preferably beating in a manner that reduces the Canadian standard freeness by 20 cc to 50 cc. This reduction is very small compared to the beating degree of typical papermaking raw materials. In this case, the Canadian standard freeness of the papermaking raw material is approximately 600 cc or more. By beating the pulp fibers in this way, but not completely unbeaten, the softener is easily fixed to the fiber surface when added in a manner containing the aforementioned softener. Furthermore, the fibers are moderately intertwined, resulting in a desired lower paper thickness, excellent softness, and good fluffiness. Moreover, paper dust is extremely difficult to generate. Further adjustments to the paper thickness can be made by adjusting the crease ratio.

[0091] It should be noted that, as a long-sized roll product that is used daily like toilet paper rolls, there are kitchen paper rolls. However, the length or diameter of the roll used by a user at one time is different, and the design concept is different, so it is difficult to design it in the same way as the toilet paper roll of the present invention.

[0092] The effects of the toilet paper package of the present invention will be further explained below with reference to the embodiments.

[0093] [Example]

[0094] Next, regarding the examples and comparative examples of the toilet paper rolls of the present invention, sensory evaluations were conducted on the "softness," "thickness," "feel (smoothness)," "absorbency," and "overall satisfaction" when using the toilet paper. The physical properties and composition of the toilet paper and toilet paper rolls of each example are shown in Table 1 below. Examples 1-5 and Comparative Examples 1-4 were manufactured as toilet paper rolls. Furthermore, the embossing of the toilet paper rolls of each example is as follows: Figure 8 The pattern shown has a nested layered structure. Regarding the dry tensile strength, measurements were performed based on JIS P 8113 (2006). For the test pieces, pieces cut to a width of 25 mm (±0.5 mm) in both the longitudinal and transverse directions were used. Measurements were taken directly with three pieces; to obtain the result for a single piece, the measured value was divided by 3. For the testing machine, a force sensor tensile testing machine TG-200N manufactured by Minebea Co., Ltd. was used, with the clamping interval set to 80 mm and the tensile speed set to 100 mm / min.

[0095] In the sensory evaluation, 25 participants used the samples from each test case and assigned absolute scores of 1 to 5 for each item: "softness," "thickness," "feel (smoothness)," "absorbency," and "overall satisfaction." The average score was used as the evaluation value. Furthermore, regarding the evaluation, "average" (neither good nor bad) was set at 3 points (the median), "good" at 5 points or below, and "poor" at 1 point or below. Each 1-point difference was assigned to a scoring system.

[0096] ◎[Table 1]

[0097]

[0098] As shown in Table 1, the physical property values ​​were confirmed. In the embodiments that meet the physical property values ​​of the present invention, particularly in terms of roll hardness and transverse absorbency (liquid absorption height), the results were equivalent to or better than those of Comparative Examples 1 to 3, which have the same winding length and number of cuts as existing products. In each sensory evaluation, the evaluations were also equivalent to or better than those of Comparative Examples 1 to 3, which have the same winding length and number of cuts as existing products.

[0099] Next, the toilet paper roll package, which is made by wrapping the toilet paper rolls with corner braces, was subjected to tensile tests on the handle, durability tests (handle), durability tests (tear section), durability tests (bottom surface tear), and an opening test. Regarding the packaging film used in the tests, such as... Figure 3As shown, toilet paper rolls are packaged with each end facing the depth direction, arranged in a six-fold configuration (two in the width direction and three in the height direction) with their circumferential surfaces touching. The packaging film is made of 45 μm thick polyethylene resin, with a softness of 211 mN, a tensile strength (breaking strength) of 14.4 N, and a tensile elongation (breaking elongation) of 778%. Example 2 described above was used for this toilet paper roll. The toilet paper roll packages are from Examples 11 to 25.

[0100] In the durability tests (handle), (crack), and (bottom surface crack), subjects gripped the handle by inserting their fingers through the finger hook holes of the toilet paper roll package and swung the package back and forth 10 times like a pendulum within a 180° range from the lowered position. This movement was performed 5 times for each test case. The durability test (handle) was evaluated according to the following criteria.

[0101] ○: After 5 tests, no cracks were found in the handle.

[0102] ×: After 5 tests, a crack was confirmed in the handle.

[0103] The durability test (crack section) was evaluated according to the following criteria.

[0104] ○: After 5 tests, no crack or elongation of the perforation line was found at the cracked area.

[0105] ×: After 5 tests, a crack or elongation of the perforation line was confirmed at the crack.

[0106] The durability test (cracks on the bottom surface) was evaluated according to the following criteria.

[0107] ○: No cracks were found on the bottom surface after 5 tests.

[0108] ×: After 5 tests, a crack was confirmed on the bottom surface.

[0109] In the opening test, the crack was made by hand along the inverted U-shaped perforation line formed on the top surface 20T 50. Each test case was tested 5 times and evaluated according to the following criteria.

[0110] ○: In all 5 attempts, it is possible to open the seal with one hand along the punch line.

[0111] ×: In more than one out of five attempts, it is impossible to open the package with one hand along the punch line.

[0112] The results are shown in Table 2.

[0113] ◎[Table 2]

[0114]

[0115] Based on these results, it can be said that the toilet paper roll of the present invention has a higher winding length and number of cuts, while also possessing sufficiently high absorbency and roll stiffness, and providing a sufficiently satisfying user experience. Therefore, it can be described as a toilet paper roll package that achieves improvements in reducing toilet paper crushing issues encountered in conventional toilet paper roll packages, increases the number of cuts and winding length as desired by consumers, and maintains performance quality comparable to conventional products.

[0116] In addition, after conducting the aforementioned durability tests, the crushing condition of the packaged toilet paper rolls was confirmed, and it was found that the toilet paper rolls were not crushed.

[0117] Label Explanation

[0118] 1…Toilet paper roll packaging;

[0119] 10… toilet paper rolls;

[0120] 10X… Not individually wrapped rolls of toilet paper;

[0121] 10Y… individually packaged rolls of toilet paper;

[0122] 11… toilet paper;

[0123] 12…paper tubes;

[0124] 13…end face;

[0125] 14…surface;

[0126] 20…Angle bracing packaging bags (packaging film);

[0127] 20A…Bag body;

[0128] 20T…top surface;

[0129] 20F…Front View;

[0130] 20B…back side;

[0131] 20L…bottom surface;

[0132] 20e…side;

[0133] 21…the opening section;

[0134] 22… Welded section;

[0135] 23…finger hook hole;

[0136] 24…handle;

[0137] 30…sheet material;

[0138] 30a…Front and side sheet;

[0139] 30b… intermediate sheet;

[0140] 30c…back side sheet;

[0141] 31…concave;

[0142] 32...convex part;

[0143] 35… point embossing;

[0144] 41… Embossing roller;

[0145] 42…elastic roller;

[0146] 43… Adhesive device;

[0147] 50…the split section;

[0148] L1…the distance between the top surface and the welded portion;

[0149] L2…width of the toilet paper roll;

[0150] L3…the diameter of the toilet paper roll;

[0151] L4… The diameter of the paper tube in a toilet paper roll.

Claims

1. A package for toilet paper rolls, comprising a resin-based packaging film for corner-supported packaging of the toilet paper rolls, wherein the toilet paper rolls are formed by rolling toilet paper into a roll, characterized in that, The thickness of the packaging film is 40μm to 60μm. Regarding the aforementioned toilet paper roll, the winding length is 34.9m to 55.1m, the number of cuts is 306 to 483, and the roll stiffness is 68N or higher and 92N or lower. The toilet paper has a laminated structure consisting of three or more sheets stacked on top of each other, with each layer having a thickness exceeding 78 μm and less than 100 μm, and each layer having a basis weight exceeding 13.5 g / m³. 2 And less than 16.0 g / m 2 .

2. The toilet paper roll packaging body according to claim 1, characterized in that, The sheet is formed by stacking one or more front-side sheets and one or more back-side sheets, wherein the sheet has a recess on one side and a protrusion corresponding to the recess on the other side. Regarding the toilet paper, the convex surfaces of the sheet face each other in such a way that the convex portion of one sheet faces the non-convex portion of the other sheet, and the convex portion of the other sheet faces the non-convex portion of one sheet, so that the toilet paper has only concave portions formed on both sides.

3. The toilet paper roll packaging body according to claim 1 or 2, characterized in that, In the toilet paper, the area of ​​the recesses exceeds 4936 mm² per sheet. 2 And less than 9872mm 2 The total area ratio of the concave portion on each side is over 44.2%.

4. The toilet paper roll packaging body according to claim 1 or 2, characterized in that, The lateral liquid absorption height of the toilet paper is above 63mm / 100s.

5. The toilet paper roll packaging body according to claim 1 or 2, characterized in that, The toilet paper has a dry tensile strength of 657 cN / 25 mm or more in the longitudinal direction and a dry tensile strength of 310 cN / 25 mm or more in the transverse direction.

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