Kitchen towel roll package

Abstract

To provide a kitchen towel roll package in which three rolls of 2-3 ply kitchen towel rolls are packaged using a packaging film printed with water-based ink, the kitchen towel roll package being free from peeling of the ink on the inner surface of the packaging film and having good packaging tightness.SOLUTION: A kitchen towel roll packaging body 1 in which three rolls are film-packaged in a state of being arranged such that axial directions of the three rolls are substantially parallel to each other, a basis weight of a kitchen towel sheet 10x part is 30 to 56g / m2, a water absorption amount is 300 to 610g / m2, winding diameters of kitchen towel rolls 10 are 127 to 175mm, and roll densities are 0.04 to 0. 13g / cm3. In the packaging film 2 of the kitchen towel roll packaging body 1, a printed part 3 printed with an aqueous ink is formed on the inner surface, and the sinking depth of the packaging film 2 is 3 to 25mm.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a kitchen towel roll package. [Background technology]

[0002] Among high-quality kitchen towels, kitchen towel sheets made using the so-called TAD (Through Air Dryer, also known as Through Air Drying) papermaking technology have excellent water absorption. However, kitchen towel sheets made using TAD papermaking technology have uneven surfaces and are thick, so even if the roll density is relatively low, the kitchen towel roll may become tightly wound.

[0003] Furthermore, kitchen towel rolls are often wrapped in a film such as polyethylene, and the wrapping film is generally printed, usually with oil-based ink.

[0004] On the other hand, as a measure against recent environmental problems, water-based inks are sometimes used instead of oil-based inks for packaging films in fields other than sanitary paper. Summary of the Invention [Problem to be solved by the invention]

[0005] However, when water-based inks are used to print on the film used to package kitchen towels, the ink adheres less well to the packaging film than oil-based inks, so the ink can peel off and get on the kitchen towel roll inside. Furthermore, when the kitchen towel roll is tightly wound, the strong friction between the kitchen towel roll and the film tends to make the ink more likely to adhere.

[0006] Therefore, if the kitchen towel roll is wound loosely to prevent the water-based ink from peeling off and adhering to the kitchen towel roll, the adhesion of the water-based ink to the kitchen towel roll is reduced, but the kitchen towel roll becomes bulky and the kitchen towel roll becomes less compact. On the other hand, if the packaging film is wrapped loosely around the kitchen towel roll, the packaging film and the kitchen towel roll are not rubbed strongly, so the adhesion of the water-based ink to the kitchen towel roll is reduced, but the package is less tight and the aesthetic appeal is poor. For these reasons, when a kitchen towel roll wound with a highly absorbent sheet is packaged in a packaging film printed with water-based ink, it is actually difficult to prevent the water-based ink from peeling off and ensure the compactness of the kitchen towel roll and the tightness (aesthetic appeal) of the package.

[0007] The present invention has been made in view of the above circumstances, and aims to provide a kitchen towel roll package in which three kitchen towel rolls are packaged, each roll being made of 2 to 3 plies of kitchen towel sheet wound into a roll using a film printed with water-based ink, and in which the ink does not peel off and the packaging is tightly packed. [Means for solving the problem]

[0008] As a result of extensive research into achieving the above-mentioned object, the inventors discovered a kitchen towel roll package in which 2-3 plies of kitchen towel sheet are wound into a roll, and the three rolls are arranged adjacent to each other with their axial directions approximately parallel to each other and packaged in film, and the packaging film has a printed area printed with water-based ink on its inner surface, and the basis weight per product ply of kitchen towel sheet, water absorption per unit area, winding diameter of the kitchen towel roll, roll density, and sinking depth of the packaging film are all within predetermined numerical ranges, leading to the completion of the present invention. Specifically, the present invention is as follows.

[0009] (1) A kitchen towel roll package is formed by winding up 2 to 3 plies of kitchen towel sheets into a roll, and the three rolls are arranged adjacent to each other so that the axial directions of the rolls are approximately parallel to each other and then wrapped in a film. The basis weight of the kitchen towel sheets per product ply is 30 to 56 g / m 2 and the water absorption per unit area of ​​the kitchen towel sheet is 300 to 610 g / m 2 The kitchen towel roll has a winding diameter of 127 to 175 mm and a roll density of 0.04 to 0.13 g / cm 3 The kitchen towel roll package has a packaging film with a printed portion printed with water-based ink formed on its inner surface, and the kitchen towel roll package is placed so that the axial direction of the three kitchen towel rolls is horizontal, and a stainless steel first ruler having a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, and a scale length of 300 mm is placed across two adjacent kitchen towel rolls in a first direction perpendicular to the axial direction, and one long side of the first ruler is positioned at a position 25% of the length of the axial direction from both ends of the two adjacent kitchen towel rolls and at each of three central measurement points m, with the plate surface of the first ruler in contact with the packaging film. The kitchen towel roll package has a reference line defined as follows: a second stainless steel ruler having a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, and a scale length of 300 mm is placed at measurement point m on the packaging film located between the two adjacent kitchen towel rolls, perpendicular to the packaging film with the width direction of the second ruler aligned with the first direction and in contact with the long side of the first ruler; the distance from the reference line to the tip of the second ruler due to the weight of the second ruler is defined as distance d; and the sinking depth D of the packaging film, measured by averaging the values ​​of distance d at a total of 12 measurement points m on the front and back of the kitchen towel roll package, is 3 to 25 mm. (2) The kitchen towel roll package according to (1), wherein the tightness of the kitchen towel roll is 1.0 to 5.0 mm. (3) The kitchen towel roll package according to (1) or (2), wherein the kitchen towel sheet has a paper thickness per product ply of 0.40 to 0.80 mm. (4) The kitchen towel roll package according to (1) or (2), wherein the percentage of the actual circumference of the film relative to the theoretical circumference of the packaging film calculated from the winding diameter of the kitchen towel roll ((actual film circumference / theoretical circumference of packaging film) x 100(%)) is 94 to 102%. (5) The kitchen towel roll package according to (1) or (2), wherein the three rolls are packaged in a caramel flavor. (6) The kitchen towel roll package according to (1) or (2), wherein the three rolls are packaged in a gusseted package. (7) The kitchen towel roll packaging according to (1) or (2), wherein the kitchen towel sheet has an uneven pattern resulting from the papermaking process, different from the embossed pattern. (8) The specific volume of the kitchen towel sheet is 7 to 23 cm 3 / g. (9) The kitchen towel roll package according to (1) or (2), wherein the kitchen towel roll has a roll length of 18 to 45 m. (10) The kitchen towel roll package according to (4), wherein the product of the roll density of the kitchen towel roll and the percentage of the actual circumference of the packaging film relative to the theoretical circumference of the film is 4 to 12. (11) The kitchen towel roll package according to (1) or (2), wherein the kitchen towel sheet has an embossed pattern, and the embossed area ratio is 4 to 30%. (12) The kitchen towel roll package according to (1) or (2), wherein the thickness of the packaging film is 18 to 52 μm. (13) The kitchen towel roll package according to (1) or (2), wherein the kitchen towel sheet contains wet pulp, and the wet pulp content is 60% by mass or more. (14) The kitchen towel roll packaging body according to (1) or (2) is such that the three rolls are arranged so that the centers of the rolls are in a substantially straight line when viewed from above, and for at least one of the two rolls that are not positioned in the middle, when viewed from above, the printed portion of the packaging film does not contact the peripheral wall surface that corresponds to an arc of 30 degrees or less from the intersection of the outer periphery of the roll and an extension line connecting the centers of the three rolls. [Effects of the Invention]

[0010] According to the present invention, a kitchen towel roll package can be provided in which three kitchen towel rolls are packaged using a film printed with water-based ink, each of which is made by winding two to three plies of kitchen towel sheet into a roll. The kitchen towel roll package does not peel off the ink and the packaging is tight. [Brief explanation of the drawings]

[0011] [Figure 1] 1 is a perspective view of a kitchen towel roll packaging according to an embodiment of the present invention. FIG. [Figure 2] FIG. 2 is a top view illustrating the printed portion of the kitchen towel roll packaging according to the embodiment. [Figure 3] FIG. 1 is a perspective view of a kitchen towel roll according to an embodiment of the present invention. [Figure 4] FIG. 2 is a diagram showing an example of an embossing pattern in the kitchen towel roll of the present embodiment. [Figure 5] 1A and 1B are diagrams showing examples of radial embossing and closed-ring structure embossing of an embossing pattern. [Figure 6] FIG. 1 is a diagram showing a height profile on the XY plane as observed by a microscope using shading. [Figure 7]FIG. 1 is a graph showing a height profile on the XY plane obtained by a microscope. [Figure 8] FIG. 10 is a diagram showing how to determine the embossing depth for an embossing pattern. [Figure 9] FIG. 2 is a diagram showing a method for measuring the water absorption of the kitchen towel sheet of the present embodiment. [Figure 10] 1 is a diagram showing a part of the papermaking process for the kitchen towel sheet of the present embodiment. FIG. [Figure 11] 1 is a diagram showing a method for measuring the sinking depth of the packaging film in the kitchen towel roll packaging of this embodiment. FIG. [Figure 12] 1 is a perspective view showing an example of a kitchen towel roll packaging package according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, a mode for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. The following present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0013] The axial direction of the kitchen towel roll package refers to the axial direction of the kitchen towel roll, which is the X direction in the drawings. The width direction (first direction) of the kitchen towel roll package refers to the direction intersecting (orthogonal to) the axial direction, the direction in which the kitchen towel rolls are lined up adjacent to each other within the kitchen towel roll package, which is the Y direction in the drawings. The thickness direction (second direction) of the kitchen towel roll package refers to the thickness direction of the kitchen towel roll package, which is the direction intersecting (orthogonal to) both the axial and width directions, which is the Z direction in the drawings. In the following description, the axial direction may be referred to as the X direction, the width direction as the Y direction, and the thickness direction as the Z direction.

[0014] Furthermore, in this specification, terms with "abbreviation" attached indicate the meaning of the term excluding "abbreviation" within the scope of common technical knowledge of a person skilled in the art, and also include the meaning itself excluding "abbreviation."

[0015] <Kitchen towel roll packaging> FIG. 1 is a perspective view of a kitchen towel roll packaging body 1 (hereinafter also simply referred to as "packaging body 1") according to this embodiment.

[0016] As shown in Figure 1, the kitchen towel roll package 1 according to this embodiment is a kitchen towel roll 10 (hereinafter simply referred to as "roll 10"), which is a roll of two to three plies of kitchen towel sheet 10x. The three rolls are arranged adjacent to each other with their axial directions generally parallel to each other and packaged in film. The kitchen towel sheet 10x has a basis weight per product ply of 30 to 56 g / m. 2 The water absorption per unit area is 300 to 610 g / m 2 The kitchen towel roll 10 has a roll diameter of 127 to 175 mm and a roll density of 0.04 to 0.13 g / cm 3The inner surface of the packaging film 2 of the kitchen towel roll packaging 1 has a printed area 3 printed with water-based ink. Then, as shown in Figure 11, the kitchen towel roll packaging 1 is placed so that the axial direction of the three kitchen towel rolls 10 is horizontal, and a stainless steel first ruler S having a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, and a scale length of 300 mm is placed across two adjacent kitchen towel rolls 10 in a first direction perpendicular to the axial direction. One long side of the first ruler S is positioned 25% of the axial length from each end of the two adjacent kitchen towel rolls 10 and at each of the three central measurement points m, and the plate surface of the first ruler S is placed in contact with the packaging film 2 to form reference lines SL. Next, a stainless steel second ruler R, weighing 64 g, 1.0 mm thick, 25 mm wide, and 300 mm long, is placed at measurement point m on the packaging film 2 located between two adjacent kitchen towel rolls 10. The second ruler R's width is aligned with the first direction and is in contact with the long side of the first ruler S. The distance d is the distance from the reference line SL under the weight of the second ruler R to the tip of the second ruler R. The sinking depth D of the packaging film 2, measured by averaging the distances d at 12 measurement points m on the front and back of the kitchen towel roll package 1, is 3 to 25 mm. This kitchen towel roll package 1 uses packaging film 2 printed with water-based ink to package three kitchen towel rolls 10, each made of two to three plies of highly absorbent kitchen towel sheets 10x. This kitchen towel roll package 1 exhibits no peeling of the water-based ink and provides a tightly packed package.

[0017] Kitchen towel roll package 1 is made up of three rolls that are lined up adjacent to each other with their axial directions approximately parallel to one another and wrapped in film, but it is preferable that the three rolls are lined up in a row approximately parallel to one another and wrapped in film, as shown in Figure 1. The three rolls are preferably packaged in caramel packaging for kitchen towel roll package 1. It is also preferable that the three rolls are packaged in gusset packaging.

[0018] According to this embodiment, in a kitchen towel roll package 1 in which three kitchen towel rolls 10, which are made of 2 to 3 plies and have excellent water absorption properties, are arranged side by side and wrapped in a packaging film 2 printed with water-based ink, the following properties can be imparted to the package 1 to prevent the water-based ink from peeling and ensure excellent tightness (beauty) of the package 1 (however, the actions and effects of this embodiment are not limited to these).

[0019] (Printing Department) A printed section 3 printed with water-based ink is formed on the packaging film 2. The printed section 3 is formed on the inner surface of the kitchen towel roll packaging 1. Preferably, the printed section 3 is formed on the inner surface of the packaging film 2 that packages the kitchen towel roll 10. By arranging the printed section 3 on the inner surface, problems such as the water-based ink peeling off from the outer surface of the kitchen towel roll packaging 1 due to contact with the outside or friction with the printed section 3 can be effectively prevented. Note that printing using water-based ink can be performed by known methods (e.g., gravure printing, offset printing, flexographic printing, etc.).

[0020] Printed portion 3 can be printed with, for example, the product name, product information, and designs such as a pattern related to the enclosed kitchen towel roll 10. From this perspective, it is preferable to place printed portion 3 on the side peripheral surface of packaging body 1 (for example, in the case of FIG. 1, it is placed on the peripheral surface of packaging body 1) to ensure high visibility for the user.

[0021] Fig. 2 is a top view illustrating the printed section 3 of the kitchen towel roll packaging 1 according to this embodiment. From the above perspective, a more preferred embodiment is one in which, as shown in Fig. 2, three rolls 101, 102, and 103 are arranged so that the centers O1, O2, and O3 of each roll 101, 102, and 103 are aligned in a substantially straight line when viewed from above (see the X direction in Figs. 2 and 1), and for at least one roll 102 of the two rolls 102 and 103 that are not positioned in the middle, the printed section 3 of the packaging film 2 does not contact the peripheral wall surface that corresponds to an arc (P2-P1-P3) that is within 30 degrees (θ1 = θ2 = 30 degrees) of the intersection P1 of the outer periphery of roll 102 and an extension line L1 connecting the centers O1, O2, and O3 of the three rolls 101, 102, and 103 when viewed from above. 2 as an example, for roll 102 that is not located at the center of the three rolls 101, 102, and 103 in a top view, the intersection point P1 is defined as having a central angle of 0 degrees with respect to center O2. The printed portion 3 is not formed on the packaging film 2 that contacts the peripheral wall surface (part of the peripheral wall surface of kitchen towel roll 102) corresponding to the area extending from intersection point P1 to point P2 on an arc that forms a central angle of 30 degrees above the plane of the paper (i.e., the arc from P1 to P2). Similarly, the printed portion 3 is not formed on the packaging film 2 that contacts the peripheral wall surface (part of the peripheral wall surface of kitchen towel roll 102) corresponding to the area extending from intersection point P1 to point P3 on an arc that forms a central angle of 30 degrees below the plane of the paper (i.e., the arc from P1 to P3). That is, it is preferable that the printed portion 3 does not contact the peripheral wall surface of the kitchen towel roll 102 corresponding to the arcs (P2-P1-P3) within 30 degrees (θ1 = θ2 = 30 degrees) of the intersection point P1. Furthermore, these angles (θ1, θ2) are more preferably within 35 degrees (θ1 = θ2 = 35 degrees) of the intersection point P1, and even more preferably within 40 degrees (θ1 = θ2 = 40 degrees). By controlling the positional relationship so that the printed portion 3 does not contact such areas (hereinafter sometimes referred to as "non-printed areas"), the problem of the water-based ink easily peeling off can be more effectively prevented.Furthermore, since such regions have a large contact area between the roll 102 and the packaging film 2 and tend to be subject to tension on the packaging film 2, by controlling the positional relationship so that the printing unit 3 does not come into contact with such regions, it is possible to effectively suppress friction between the water-based ink of the printing unit 3 and the roll 102, and as a result, it is possible to more effectively suppress the problem of the water-based ink easily peeling off (however, the actions and effects of this embodiment are not limited to these).

[0022] Here, we have illustrated a case where only one roll 102 out of the three rolls 101, 102, and 103 satisfies the above condition, that is, the printing section 3 is not in contact with the non-printing area. However, it is more preferable that, of the two rolls 101, 102, and 103, the two rolls 102 and 103 that are not positioned in the center satisfy the above condition.

[0023] (Tightness (cosmetic properties)) Figure 11 is a diagram showing a method for measuring the sinking depth of the packaging film 2 in the kitchen towel roll packaging 1. Figure 11 shows the kitchen towel roll packaging 1 placed on a stand B as viewed from the axial direction of the kitchen towel roll 10. In the figure, arrow Z indicates the thickness direction, which is upward, and arrow Y indicates the first direction.

[0024] The tightness can be expressed as the depth D of the packaging film 2 sinking due to the weight of the second ruler R when the first ruler S is placed across two adjacent kitchen towel rolls 10 and the second ruler R is placed on the packaging film 2 located between the two kitchen towel rolls 10 (hereinafter sometimes simply referred to as the "depth D of the packaging film 2 sinking").

[0025] The recession depth D of the packaging film 2 is 3 to 25 mm from the reference line SL. By setting the recession depth D of the packaging film 2 within the above-mentioned range, the aesthetic appeal (tightness) of the kitchen towel roll package 1 can be ensured. It also ensures that the package 1 is less likely to tear during transport. Furthermore, if the recession depth D of the packaging film 2 is below the above-mentioned lower limit, ink is more likely to adhere to the kitchen towel roll 10. With rolls with large winding diameters, the contact area between the rolls is large, making them more likely to be crushed, and this problem tends to occur. However, according to this embodiment, this problem can be effectively prevented even with large winding diameters. If the recession depth D of the packaging film 2 exceeds the above-mentioned upper limit, the aesthetic appeal (tightness) of the package 1 deteriorates. To further improve the above-mentioned effects, the lower limit of the above-mentioned range of the recession depth D of the packaging film 2 is preferably 5 mm or more, more preferably 7 mm or more. Furthermore, the upper limit of the above-mentioned range of the recession depth D of the packaging film 2 is preferably 20 mm or less, more preferably 13 mm or less.

[0026] The sinking depth D of the packaging film 2 is measured as shown in FIG.

[0027] First, as shown in FIG. 11, the kitchen towel roll package 1 is placed on a table B or the like so that the axial direction of the kitchen towel roll 10 is horizontal. Then, a stainless steel first ruler S is placed across two adjacent kitchen towel rolls 10 in a first direction (the direction indicated by arrow Y in FIG. 11) perpendicular to the axial direction of the kitchen towel roll 10, with its plate surface in contact with the packaging film 2. The surface (line) of the first ruler S that contacts the packaging film 2 is designated as the reference line SL (indicated by the two-dot chain line in FIG. 11). At this time, the first ruler S is placed on the packaging film 2 so that one long side of the first ruler S is in contact with measurement point m, which will be described later. Next, a stainless steel second ruler R is placed on the packaging film 2 between the two adjacent kitchen towel rolls 10. The second ruler R is placed perpendicular to the packaging film 2 at approximately the center (measurement point m) of the packaging film 2 between the two adjacent kitchen towel rolls 10 in the first direction, with the width direction Rw of the second ruler R aligned with the first direction and in contact with the long side of the first ruler. The distance d from the height position of the reference line SL of the first ruler S to the lower tip of the second ruler R due to the weight of the second ruler R is measured. As described in detail below, the same distance d is measured at 12 measurement points m per kitchen towel roll package 1, and the average of these measurements is used to determine the sinking depth D of the packaging film 2. The first ruler S has a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, a scale length of 300 mm, and is JIS Class 1. The second ruler R is the same as the first ruler S. As the first ruler S and the second ruler R, for example, the "Silver Ruler" manufactured by Shinwa Measuring Co., Ltd. can be used.

[0028] The distance d between the height position of the reference line SL of the first ruler S and the lower tip of the second ruler R is measured at three measurement points m approximately in the center between two adjacent kitchen towel rolls 10: at positions 25% of the axial length of the kitchen towel roll package 1 from both ends in the axial direction of the kitchen towel roll 10 (the axial direction of the kitchen towel roll 10), and at the center in the axial direction. These three measurements are taken between the central kitchen towel roll 10 of the three rolls packaged in the packaging film 2 and the kitchen towel rolls 10 adjacent to it on both sides in the first direction. Measurements are also taken on both the front and back of each kitchen towel roll package 1. This is done for one kitchen towel roll package 1, and the distance d between the height position of the reference line SL of the first ruler S and the tip of the second ruler R is measured for a total of 12 measurement points m. The average value is used as the sinking depth D of the packaging film 2.

[0029] In the kitchen towel roll packaging 1 according to this embodiment, the percentage of the actual circumference of the film relative to the theoretical circumference of the packaging film 2 calculated from the winding diameter of the kitchen towel roll 10 (described below) ((actual film circumference / theoretical circumference of packaging film) × 100(%)) is preferably 94 to 102%. The lower limit is more preferably 96% or more, and even more preferably 97% or more. The upper limit is more preferably 101% or less, and even more preferably 100% or less. When the percentage is equal to or greater than the lower limit, it is possible to effectively prevent the packaging film 2 and the kitchen towel roll 10 from rubbing against each other due to excessively tight packaging, and to effectively prevent problems such as ink adhering to the roll. When the percentage is equal to or less than the upper limit, it is possible to effectively prevent the tightness of the kitchen towel roll packaging 1 from decreasing.

[0030] The theoretical circumference of the packaging film 2 is preferably 900 to 1250 mm, and the actual film circumference is preferably 880 to 1230 mm. The lower limit of the above range of the theoretical circumference of the packaging film 2 is more preferably 950 mm or more, and even more preferably 1000 mm or more. The upper limit of the above range of the theoretical circumference of the packaging film 2 is more preferably 1200 mm or less, and even more preferably 1150 mm or less. The lower limit of the above range of the actual film circumference is more preferably 940 mm or more, and even more preferably 990 mm or more. The upper limit of the above range of the actual film circumference is more preferably 1190 mm or less, and even more preferably 1140 mm or less. When the theoretical circumference is equal to or greater than the above lower limit or when the actual film circumference is equal to or greater than the above lower limit, it is possible to effectively prevent a decrease in basis weight to achieve a constant roll density due to a smaller winding diameter, and as a result, it is possible to effectively prevent a decrease in the water absorbency of the kitchen towel sheet 10x. If the theoretical circumference is less than the upper limit described above, or if the actual film circumference is less than the upper limit described above, the decrease in compactness of the kitchen towel roll 10 due to an increase in the winding diameter can be effectively prevented.

[0031] To determine the theoretical circumference of packaging film 2 of kitchen towel roll packaging 1, first tear packaging film 2 of kitchen towel roll packaging 1, remove all three kitchen towel rolls 10, and measure the winding diameter of each (measure one point in the center of each roll in the width direction (axial direction) of the roll, and calculate the average value for the three rolls). Then, the theoretical circumference of the packaging film 2 is calculated based on the following formula. Theoretical circumference of packaging film 2 = roll diameter x 4 + roll diameter x 3.14

[0032] The actual circumference of packaging film 2 is determined by measuring the circumference (Y direction) with a ruler or the like (tape measure, etc.) near the center of the height direction (axial direction, X direction) of kitchen towel roll packaging 1. Note that when the packaging form is caramel packaging as shown in Figure 1, packaging film 2 overlaps in part of the circumference direction, but this overlapping part is not included in the circumference.

[0033] In the kitchen towel roll package 1 according to this embodiment, the product of the roll density of the kitchen towel roll 10 (described later) and the percentage of the actual circumference of the packaging film 2 to the theoretical circumference (roll density (g / cm 3 ) × (actual film circumference / theoretical packaging film circumference) × 100 (percentage, %)) is preferably 4 to 12. This product refers to a numerical value derived by the formula shown on the left. The lower limit of this product is more preferably 5 or more, and even more preferably 6 or more. The upper limit of this product is more preferably 11 or less, and even more preferably 9 or less. When the product is equal to or greater than the above-mentioned lower limit, it is possible to more effectively prevent the packaging from being too tight, which would cause the packaging film 2 and the kitchen towel roll 10 to rub against each other, and as a result, it is possible to more effectively prevent the water-based ink from easily adhering to the kitchen towel roll 10. When the product is equal to or less than the above-mentioned upper limit, it is possible to more effectively prevent deterioration of the tightness of the packaging.

[0034] In this case, the product of the roll density of kitchen towel roll 10 and the percentage of the actual circumference of packaging film 2 relative to the theoretical circumference of packaging film 2 in kitchen towel roll package 1 described above represents the balance between kitchen towel roll 10 and packaging film 2. In other words, when the roll density of kitchen towel roll 10 is high, the percentage value is increased (the theoretical circumference of packaging film 2 is shortened) to maintain the texture of kitchen towel roll 10 when packaged, thereby preventing rubbing of kitchen towel roll 10. On the other hand, when the roll density is low, the percentage value is decreased (the theoretical circumference of packaging film 2 is lengthened) to prevent kitchen towel roll 10 from being crushed when packaged, thereby preventing kitchen towel roll 10 from being compressed by packaging film 2.

[0035] FIG. 12 is a perspective view showing an example of a kitchen towel roll wrapping package 5 according to this embodiment.

[0036] 12, for example, four packs (12 rolls in total) of kitchen towel roll packages 1 shown in FIG. 1 may be collected and further packaged to form kitchen towel roll package package 5. In kitchen towel roll package package 5, multiple kitchen towel roll packages 1 are preferably arranged in the thickness direction (Z direction) and packaged in first exterior film 6. In this case, there is no particular limit to the total number of rolls.

[0037] (packaging film) In the kitchen towel roll packaging 1 according to this embodiment, the packaging film 2 that packages three kitchen towel rolls 10 has a printed area 3 printed with water-based ink formed on at least a portion of at least one surface. Preferably, the packaging film 2 does not have a printed area printed with oil-based ink. While packaging films printed with oil-based ink are less environmentally friendly, the packaging film 2 of the kitchen towel roll packaging 1 according to this embodiment is printed with water-based ink, which takes recent environmental issues into consideration.

[0038] The material of the packaging film 2 is not particularly limited, but preferably contains at least one selected from the group consisting of polyethylene, polypropylene, polyester, polyamide, polycarbonate, polystyrene, and polyvinyl chloride, more preferably contains polyethylene and / or polypropylene, even more preferably is mainly polyethylene, and even more preferably is 100% polyethylene. Furthermore, the material is not particularly limited among polyethylenes, but is more preferably a mixture of LDPE and LLDPE.

[0039] The thickness of the packaging film 2 is preferably 18 to 52 μm. The lower limit is more preferably 21 μm or more, and even more preferably 25 μm or more. The upper limit is more preferably 45 μm or less, and even more preferably 35 μm or less. The thickness of the packaging film 2 is measured in accordance with JIS K 7130. When the thickness of the packaging film 2 is equal to or greater than the above-mentioned lower limit, the packaging film 2 can be effectively prevented from stretching or tearing when tightly wrapped. As a result, tight wrapping becomes easier, and deterioration of tightness can be more effectively prevented. When the thickness of the packaging film 2 is equal to or less than the above-mentioned upper limit, water-based ink can be effectively prevented from adhering to the kitchen towel roll 10 wrapped using the packaging film 2.

[0040] The tensile strength of the packaging film 2 in the machine direction (MD) according to JIS Z 1702 is preferably 20 to 70 MPa. The lower limit is more preferably 25 MPa or more, and even more preferably 30 MPa or more. The upper limit is more preferably 60 MPa or less, and even more preferably 55 MPa or less. The tensile strength of the packaging film 2 in the cross direction (CD) according to JIS Z 1702 is preferably 10 to 55 MPa. The lower limit is more preferably 15 MPa or more, and even more preferably 20 MPa. The upper limit is more preferably 50 MPa or less, and even more preferably 45 MPa or less. Setting the tensile strength of the packaging film 2 within the above-mentioned ranges tends to effectively ensure the decorativeness (tightness), crush resistance, prevention of ink peeling, and tear resistance during transport of the kitchen towel roll package 1.

[0041] <Kitchen towel roll> FIG. 3 is a perspective view of the kitchen towel roll 10 according to this embodiment.

[0042] As shown in Figure 3, the kitchen towel roll 10 according to this embodiment is a kitchen towel roll 10 in which a kitchen towel sheet 10x is wound into a roll. When wound into a roll, it is preferably wound around a paper tube 20. The kitchen towel sheet 10x is preferably perforated in the roll width direction (axial direction) at approximately equal intervals in the winding direction of the roll (not shown).

[0043] 3, the surface of kitchen towel sheet 10x facing the outside of the roll is referred to as surface 10a (surface of kitchen towel sheet 10x), and the surface facing the center of the roll is referred to as back surface 10b (back surface of kitchen towel sheet 10x). Also, the edge of kitchen towel sheet 10x is referred to as outermost edge 10e of kitchen towel roll 10.

[0044] The kitchen towel roll 10 can be used, for example, as a roll (kitchen paper roll) of kitchen paper (sometimes called paper towel, cooking paper, etc.) used in home kitchens, restaurant kitchens, etc. to wipe away moisture or oil and remove dirt, as well as other rolls of sanitary paper.

[0045] (winding diameter and winding length)

[0046] The kitchen towel roll 10 according to this embodiment has a roll diameter DR of 127 to 175 mm. If the roll diameter DR is below the lower limit, the basis weight of the kitchen towel sheet 10x decreases, resulting in reduced water absorbency. If the roll diameter DR exceeds the upper limit, the compactness of the kitchen towel roll 10 decreases. To more effectively prevent the above-mentioned problems, the lower limit of the roll diameter DR range is preferably 135 mm or more, and more preferably 140 mm or more. The upper limit of the roll diameter DR range is preferably 165 mm or less, and more preferably 157 mm or less.

[0047] The roll diameter DR of the roll is measured, for example, using a diameter rule manufactured by Muratec KDS Co., Ltd. It is preferable to measure three kitchen towel rolls 10 and average the measurement results.

[0048] The winding length of the kitchen towel roll 10 is preferably 18 to 45 m. The lower limit is more preferably 20 m or more, and even more preferably 24 m or more. The upper limit is more preferably 40 m or less, and even more preferably 35 m or less. When the winding length is equal to or greater than the above-mentioned lower limit, it is possible to more effectively prevent the roll density from decreasing in order to achieve a constant winding diameter DR, thereby effectively preventing the compactness of the kitchen towel roll 10 from deteriorating. When the winding length is equal to or less than the above-mentioned upper limit, it is possible to more effectively prevent the roll density from increasing in order to achieve a constant winding diameter DR, thereby effectively preventing the water-based ink of the packaging film 2 from easily adhering to the kitchen towel roll 10.

[0049] The roll length is preferably measured as follows: First, the length of 10 sheets of kitchen towel sheets 10x between the perforations of kitchen towel roll 10 is measured. Next, the number of sheets in kitchen towel roll 10 is measured, and the roll length is calculated proportionally from the length of 10 sheets and the number of sheets. For example, if the length of 10 sheets is 1.80 m and the number of sheets is 150, the roll length is 1.80 m × (150 / 10) = 27 m. Note that if kitchen towel roll 10 does not have perforations, it is preferable to measure the roll length.

[0050] (roll width and roll mass) The roll width of the kitchen towel roll 10 is preferably 150 to 380 mm. The lower limit is more preferably 200 mm or more, and even more preferably 250 mm or more. The upper limit is more preferably 340 mm or less, and even more preferably 300 mm or less. When the roll width is equal to or greater than the above-mentioned lower limit, a decrease in the amount of water absorbed per sheet of the kitchen towel sheet 10x can be effectively prevented. When the roll width is equal to or less than the above-mentioned upper limit, an unnecessary increase in the amount of water absorbed per sheet of the highly absorbent kitchen towel sheet 10x as in this embodiment can be effectively prevented, and as a result, an increase in costs can be effectively prevented.

[0051] The roll mass of kitchen towel roll 10 is preferably 200 to 550 g. The lower limit is more preferably 240 g or more, and even more preferably 260 g or more. The upper limit is more preferably 490 g or less, and even more preferably 450 g or less. When the roll mass is equal to or greater than the above-mentioned lower limit, it is possible to effectively prevent the roll density from decreasing in order to achieve a constant winding diameter of kitchen towel roll 10, thereby effectively preventing the compactness of kitchen towel roll 10 from deteriorating. When the roll mass is equal to or less than the above-mentioned upper limit, it is possible to even more effectively prevent the roll density from increasing in order to achieve a constant winding diameter of kitchen towel roll 10, thereby effectively preventing the water-based ink provided on packaging film 2 from easily adhering to kitchen towel roll 10.

[0052] The roll mass is the mass per 280 mm of roll width, not including the core (paper tube 20) of the kitchen towel roll 10. If the roll width is not 280 mm, it is converted to the mass per 280 mm by proportional calculation.

[0053] (roll density) The roll density of the kitchen towel roll 10 according to this embodiment is 0.04 to 0.13 g / cm 3If the roll density is below the lower limit, the compactness of the kitchen towel roll 10 will be poor. If the roll density exceeds the upper limit, the water-based ink on the packaging film 2 will be more likely to adhere to the kitchen towel roll 10. From the viewpoint of more effectively suppressing the above-mentioned problems, the lower limit of the above range of the roll density is preferably 0.05 g / cm. 3 More preferably, it is 0.06 g / cm or more. 3 The upper limit of the above range of the roll density is preferably 0.11 g / cm 3 or less, more preferably 0.09 g / cm 3 The following is the result.

[0054] Roll density is expressed as (roll mass) ÷ (roll volume). Roll mass is the mass of the kitchen towel roll 10 per 280 mm roll width. Roll volume is expressed as [{cross-sectional area of ​​the roll's outer diameter (winding diameter DR)} - (cross-sectional area of ​​the cardboard core outer diameter DI of the cardboard core 20)] × roll width (converted per 280 mm). For example, if the roll mass (excluding the core) per 280 mm roll width is 382 g, the winding diameter DR is 150 mm, and the cardboard core outer diameter DI is 39 mm, then roll density = 382 g ÷ [{3.14 × (150 mm ÷ 2 ÷ 10) 2 -3.14×(39mm÷2÷10) 2}×(280mm÷10)]=0.08g / cm 3 This becomes:

[0055] (winding density) The winding density of the kitchen towel roll 10 according to this embodiment is 0.20 to 0.56 m / cm 2 The lower limit is preferably 0.24 m / cm. 2 More preferably, it is 0.30 m / cm 2 The upper limit is more preferably 0.50 m / cm 2 More preferably, it is 0.45 m / cm or less. 2When the winding density of kitchen towel roll 10 is equal to or greater than the above-mentioned lower limit, it is possible to effectively prevent the roll density from decreasing, and to effectively prevent the compactness of kitchen towel roll 10 from deteriorating. Furthermore, when the winding density of kitchen towel roll 10 is equal to or less than the above-mentioned upper limit, it is possible to effectively prevent the roll density from increasing, and to effectively prevent the water-based ink provided on packaging film 2 from easily adhering to kitchen towel roll 10.

[0056] The winding density is expressed as (winding length × number of plies) ÷ (cross-sectional area of ​​the roll). The cross-sectional area of ​​the roll 10 is expressed as {cross-sectional area of ​​the outer diameter (winding diameter DR) part of the roll - (cross-sectional area of ​​the cardboard tube outer diameter DI part of the cardboard tube 20)}. For example, in the case of a winding length of 27 m, 2 plies, a winding diameter DR of 150 mm, and a cardboard tube outer diameter DI of 39 mm, the winding density = (27 m × 2) ÷ {3.14 × (150 mm ÷ 2 ÷ 10)} 2 -3.14×(39mm÷2÷10) 2}=0.33m / cm 2 This becomes:

[0057] (Rolling hardness) The tightness of the kitchen towel roll 10 is preferably 1.0 to 5.0 mm. The lower limit is more preferably 1.5 mm or more, and even more preferably 2.0 mm or more. The upper limit is more preferably 4.0 mm or less, and even more preferably 3.0 mm or less. When the tightness of the kitchen towel roll 10 is at or above the above-mentioned lower limit, it is possible to effectively prevent the kitchen towel roll 10 from being wound too tightly, and as a result, it is possible to effectively prevent the water-based ink provided on the packaging film 2 from easily adhering to the kitchen towel roll 10. On the other hand, when the tightness of the kitchen towel roll 10 is at or below the above-mentioned upper limit, it is possible to effectively prevent the kitchen towel roll 10 from being wound too loosely, and as a result, it is possible to effectively prevent the compactness of the kitchen towel roll 10 from deteriorating.

[0058] The tightness of the roll of kitchen towel roll 10 is preferably measured as follows using a compression tester (handy compression tester KES-G5 manufactured by Kato Tech Co., Ltd.). First, place kitchen towel roll 10 horizontally on a hard table with its axis horizontal. Next, place an acrylic plate (width 4 cm, long side length 29 cm, thickness 2 mm) on top of kitchen towel roll 10 so that the long side of the acrylic plate is parallel to the axial direction of the roll (approximately 280 mm) (the long side of the acrylic plate is approximately 10 mm longer than the axial direction of the roll). At this time, to prevent the weight of the acrylic plate from crushing kitchen towel roll 10, the weight of the acrylic plate is set to approximately 27 g for a long side length of 29 cm. Next, place the compression element of the KES-G5 (area 2.0 cm) at the center of the 4 cm width of the acrylic plate. 2 ) is pressed at a speed of 0.01 cm / sec. The pressure of the compressor pressing the acrylic plate is 1 gf / cm 2 The indentation depth when the pressure is 500gf / cm is T0. 2 The compression depth at this point is defined as Tm, and the difference between Tm and T0 (Tm - T0) is defined as the roll tightness. Next, kitchen towel roll 10 is rotated 90 degrees circumferentially around its central axis, and the compression depths Tm and T0 are measured in the same manner as above, to determine the difference between Tm and T0 (Tm - T0). In this way, by using an acrylic plate instead of directly compressing kitchen towel roll 10 with the compression element, the entire width of kitchen towel roll 10 can be compressed, making it possible to evaluate the crushability of kitchen towel roll 10 when packaged in packaging film 2. The roll tightness is measured twice for each kitchen towel roll 10. That is, for three kitchen towel rolls 10, each is measured twice, and the results of a total of six measurements (= two times per roll x three rolls) are averaged. The physical property of roll hardness is a complex combination of multiple factors, such as the physical properties of the base paper (basis weight, thickness, raw material composition, compression characteristics such as cushioning in the thickness direction, surface properties, etc.), embossing (embossing shape, area, depth, etc.), and the degree of winding during winding, and since it is difficult to define each factor individually, in this application it is defined as an index called roll hardness.

[0059] (Paper tube) The kitchen towel roll 10 preferably has a paper tube 20 at its center that is parallel to the axial direction. The paper tube 20 is a core around which the kitchen towel sheet 10x is wound, and may be, for example, roughly cylindrical in cross section. The paper tube 20 is preferably made of multiple layers of base paper, and more preferably two layers. The paper used for the paper tube 20 preferably contains BKP (bleached Kraft pulp), and the BKP content is preferably 60% by mass or more. The lower limit is more preferably 70% by mass or more, and even more preferably 80% by mass or more. When the BKP content of the paper tube 20 is equal to or greater than the above-mentioned lower limit, a decrease in the strength of the paper tube 20 can be effectively prevented, and as a result, the kitchen towel roll 10 can be effectively prevented from being easily crushed, which can effectively prevent ink from being easily adhered to the roll 10 in parts. From the viewpoint of further exerting the above-mentioned effects, the content of LBKP and NBKP among the above-mentioned BKPs, where the total of LBKP and NBKP is 100% by mass, is preferably LBKP:NBKP=50-100:0-50% by mass, more preferably LBKP:NBKP=70-100:0-30% by mass, even more preferably LBKP:NBKP=90-100:0-10% by mass, and even more preferably LBKP:NBKP=95-100:0-5% by mass.

[0060] (Paper tube outer diameter) Furthermore, the cardboard tube outer diameter DI, which is the outer diameter of the cardboard tube 20 that forms the core of the kitchen towel roll 10, is preferably 28 to 58 mm. The lower limit is more preferably 33 mm or more, and even more preferably 40 mm or more. The upper limit is more preferably 53 mm or less, and even more preferably 46 mm or less. When the cardboard tube outer diameter DI is equal to or greater than the above-mentioned lower limit, it is possible to effectively prevent the roll density from decreasing when the kitchen towel roll 10 is wound to a constant winding diameter DR, thereby effectively preventing the compactness of the kitchen towel roll 10 from deteriorating. When the cardboard tube outer diameter DI is equal to or less than the above-mentioned upper limit, it is possible to effectively prevent the roll density from increasing when the kitchen towel roll 10 is wound to a constant winding diameter DR, thereby effectively preventing the water-based ink provided on the packaging film 2 of the kitchen towel roll 10 from adhering.

[0061] The outer diameter DI of the paper tube is measured, for example, using a diameter ruler manufactured by Muratec KDS Co., Ltd. Preferably, the measurement is performed on three kitchen towel rolls 10 and the measurement results are averaged.

[0062] <Kitchen towel sheet>

[0063] The kitchen towel sheet 10x according to this embodiment is made of 2 to 3 plies, and preferably 2 plies.

[0064] (Basic weight) The basis weight per ply of the 10x kitchen towel sheet is 30-56g / m 2 If the basis weight per product ply is below the above-mentioned lower limit, the water absorbency of the kitchen towel sheet 10x will be poor. Furthermore, if the basis weight exceeds the above-mentioned upper limit, the kitchen towel roll 10 will be less compact, and the water-based ink provided on the packaging film 2 will be more likely to adhere to the kitchen towel roll 10. Basis weight can be measured based on JIS P 8124, and basis weight per product ply refers to the basis weight measured without changing the number of plies of the kitchen towel sheet 10x (without peeling or adding plies). Furthermore, in this specification, unless otherwise specified, "per product ply" refers to the basis weight per ply constituting the kitchen towel sheet 10x. For example, in the case of a two-ply kitchen towel sheet, "basis weight per product ply" refers to the basis weight of the two plies, and in the case of a three-ply kitchen towel sheet, "basis weight per product ply" refers to the basis weight of the three plies. From the viewpoint of more effectively suppressing the above-mentioned problems, the lower limit of the above-mentioned range of basis weight per product ply is preferably 34 g / m. 2 More preferably, it is 38 g / m or more. 2 The upper limit of the above range of basis weight per product ply is preferably 50 g / m 2 or less, more preferably 46 g / m 2 The following is the result.

[0065] (Water absorption amount) In this embodiment, the water absorption per unit area of ​​the product ply of the kitchen towel sheet 10x is 300 to 610 g / m 2 If the water absorption per unit area is below the above-mentioned lower limit, the basis weight of the kitchen towel sheet 10x will be low, resulting in poor water absorption. If the water absorption per unit area exceeds the above-mentioned upper limit, the basis weight of the kitchen towel sheet 10x will be high, resulting in poor compactness of the kitchen towel roll 10 and making it easier for the water-based ink provided on the packaging film 2 to adhere to the kitchen towel roll 10. From the viewpoint of more effectively suppressing the above-mentioned problems, the lower limit of the above-mentioned range of water absorption per unit area per product ply is preferably 350 g / m 2 More preferably, it is 380 g / m or more. 2 The upper limit of the above range of the water absorption per unit area per product ply is preferably 550 g / m 2 More preferably, it is 500 g / m or less. 2 The following is the result.

[0066] Furthermore, the water absorption per unit mass of the product ply of the kitchen towel sheet 10x is preferably 6.0 g / g or more. The lower limit is more preferably 8.0 g / g or more, and even more preferably 10.0 g / g or more. The upper limit is not particularly limited, but is preferably 14.0 g / g or less, and more preferably 13.0 g / g or less. When the water absorption per unit mass of the product ply is equal to or greater than the above-mentioned lower limit, a decrease in the water absorbency of the kitchen towel sheet 10x can be effectively prevented.

[0067] FIG. 9 is a diagram showing a method for measuring the water absorption of the kitchen towel sheet 10x according to this embodiment.

[0068] When the kitchen towel sheet 10x is two-ply, the water absorption of each ply is preferably measured as follows. First, two plies of the kitchen towel sheet 10x are taken and cut using a square template with each ply measuring 7.6 cm to prepare rectangular test pieces 200 with sides of 7.6 cm. The mass of the test piece 200 before water absorption is measured using an electronic balance. The test piece 200 is set in a holder 220 (a jig that fixes three points of the test piece 200, made of a metal that does not absorb water).

[0069] Next, distilled water is poured into a commercially available tray to a depth of 2 cm, and the test piece 200 set in the holder 220 is immersed in the distilled water for 2 minutes. After immersion for 2 minutes, the test piece 200 is removed from the distilled water together with the holder 220, and the holder 220 and test piece 200 are hung from a rod placed in an empty water tank with the corner 200a facing up, and the lid of the water tank is closed and left for 5 minutes.

[0070] Thereafter, the holder 220 and the test piece 200 are taken out of the water tank, the holder 220 is removed, and the mass of the test piece 200 is measured using an electronic balance. From the change in mass of the test piece 200 before and after immersion in distilled water, the amount of distilled water absorbed per unit area of ​​the test piece 200 (g of water / sheet m 2 , 1m 2 Hit. Abbreviated as g / m 2 Furthermore, the water absorption per unit area (g of water / sheet m 2 ) by the basis weight of the product ply of the test piece 200 to obtain the water absorption per unit area (water g / sheet m 2 ) / basis weight (sheet g / sheet m 2 ) = Water absorption per unit mass (g of water / g of sheet, per 1g. Abbreviated as g / g). Measurements are carried out five times for each sample, and the average value is used.

[0071] In addition, even if the kitchen towel sheet 10x is a 3-ply, it is preferable to measure it as a 3-ply sheet using the same procedure as for the 2-ply sheet. This measurement is carried out at a temperature of 23±1°C and humidity of 50±2% in accordance with JIS P 8111. The distilled water is kept at 23±1°C.

[0072] (paper thickness) The paper thickness of the kitchen towel sheet 10x is preferably 2.0 to 4.0 mm / 10 sheets. The lower limit is more preferably 2.3 mm / 10 sheets or more, and even more preferably 2.6 mm / 10 sheets or more. The upper limit is more preferably 3.6 mm / 10 sheets or less, and even more preferably 3.3 mm / 10 sheets or less. When the paper thickness is equal to or greater than the above-mentioned lower limit, the decrease in water absorbency of the kitchen towel sheet 10x can be more effectively suppressed. When the paper thickness is equal to or less than the above-mentioned upper limit, the decrease in compactness of the kitchen towel roll 10 can be effectively suppressed.

[0073] Paper thickness can be measured using a thickness gauge (a dial thickness gauge called "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa, a probe diameter of 30 mm, and a sample placed between the probe and the measuring table. The gauge is read when the probe is lowered at a speed of 1 mm per second or less. The sample is measured using 10 sheets of 10x kitchen towel sheets (5 sets for 2-ply, 3 sets for 3-ply, and the value is proportionally calculated to 10 sets). The measurement is also repeated 10 times at different locations, and the results are averaged.

[0074] The paper thickness per product ply of the kitchen towel sheet 10x is preferably 0.40 to 0.80 mm. The lower limit is more preferably 0.45 mm or more, and even more preferably 0.50 mm or more. The upper limit is more preferably 0.72 mm or less, and even more preferably 0.68 mm or less. When the paper thickness per product ply is equal to or greater than the above-mentioned lower limit, the decrease in water absorbency of the kitchen towel sheet 10x can be effectively suppressed. When the paper thickness per product ply is equal to or less than the above-mentioned upper limit, the decrease in compactness of the kitchen towel roll 10 can be effectively suppressed.

[0075] (specific volume) The specific volume per product ply of 10 kitchen towel sheets is 7 to 23 cm 3 / g. The lower limit is more preferably 9 cm 3 / g or more, more preferably 12 cm 3 / g or more. The upper limit is more preferably 20 cm 3 / g or less, and more preferably 17 cm 3 / g or less. When the specific volume of the kitchen towel sheet 10x is equal to or greater than the above-mentioned lower limit, the decrease in the water absorbency of the kitchen towel sheet 10x can be effectively suppressed. Also, when the specific volume of the kitchen towel sheet 10x is equal to or less than the above-mentioned upper limit, the deterioration in the compactness of the kitchen towel roll 10 can be effectively suppressed. The specific volume per product ply is calculated by dividing the paper thickness per product ply of the kitchen towel sheet 10x by the basis weight per product ply, and is expressed as the volume cm per unit g. 3 It is expressed as:

[0076] (DMDT, DCDT and GMT) The dry machine direction tensile strength (DMDT) of the kitchen towel sheet 10x according to JIS P 8113 is preferably 7 to 14 N / 25 mm per product ply. The lower limit is more preferably 8 N / 25 mm or more, and even more preferably 9 N / 25 mm or more. The upper limit of the above range of DMDT is more preferably 13 N / 25 mm or less, and even more preferably 12 N / 25 mm or less. In this case, the machine direction refers to the MD direction (roll winding direction).

[0077] Furthermore, the dry cross direction tensile strength (DCDT) of the kitchen towel sheet 10x according to JIS P 8113 is preferably 7 to 14 N / 25 mm per product ply. The lower limit is more preferably 8 N / 25 mm or more, and even more preferably 9 N / 25 mm or more. The upper limit is more preferably 13 N / 25 mm or less, and even more preferably 12 N / 25 mm or less. In this case, the cross direction refers to the CD direction (roll width direction (axial direction)).

[0078] Furthermore, the GMT (Geometric Mean Tensile strength), which is the square root of the product of DMDT and DCDT, is preferably 7 to 14 N / 25 mm per product ply. The lower limit is more preferably 8 N / 25 mm or more, and even more preferably 9 N / 25 mm or more. The upper limit is more preferably 13 N / 25 mm or less, and even more preferably 12 N / 25 mm or less.

[0079] When DMDT, DCDT, or GMT is at or above the above-mentioned lower limits, a decrease in the basis weight of kitchen towel sheet 10x can be effectively suppressed, and a decrease in water absorbency can be effectively suppressed. When DMDT, DCDT, or GMT is at or below the above-mentioned upper limits, an increase in the basis weight of kitchen towel sheet 10x can be effectively suppressed, and as a result, a decrease in the compactness of kitchen towel roll 10 can be effectively suppressed, and water-based ink provided on packaging film 2 can be effectively prevented from easily adhering to kitchen towel roll 10. Note that DMDT and DCDT of kitchen towel sheet 10x are measured in accordance with JIS P 8113, and GMT is calculated from the square root of the product of the measured DMDT and DCDT.

[0080] The kitchen towel sheet 10x preferably contains wet pulp, and the wet pulp content is preferably 60% by mass or more per product ply. The lower limit is more preferably 70% by mass or more, and even more preferably 80% by mass or more. A kitchen towel sheet 10x containing wet pulp has better water absorption than one containing dry pulp. Furthermore, the specific volume of the kitchen towel sheet 10x is more likely to decrease than one containing dry pulp, making it less likely for the aqueous ink provided on the packaging film 2 to adhere to the kitchen towel roll 10. By ensuring that the wet pulp content is above the above-mentioned lower limit, a decrease in water absorption can be more effectively prevented when the basis weight of the kitchen towel sheet 10x is low. Furthermore, an increase in specific volume can be effectively prevented, thereby effectively preventing the compactness of the kitchen towel roll 10 from deteriorating.

[0081] Pulp that can be used includes, for example, softwood bleached kraft pulp (NBKP) and hardwood bleached kraft pulp (LBKP). The content ratios are preferably NBKP:LBKP = 40-100% by mass: 0-60% by mass, more preferably NBKP:LBKP = 50-90% by mass: 10-50% by mass, and even more preferably NBKP:LBKP = 60-80% by mass: 20-40% by mass, where NBKP and LBKP are combined to form 100% by mass. If desired, recycled paper pulp may be contained in an amount of 100% by mass or less, based on 100% by mass of the combined total of NBKP and LBKP. In this case, the recycled paper pulp content is preferably 50% by mass or less, more preferably 20% by mass or less, and even more preferably 0% by mass.

[0082] (seat length) The sheet length between perforations (the length of the kitchen towel sheet 10x in the roll winding direction) is preferably 100 to 250 mm. The lower limit is more preferably 130 mm or more, and even more preferably 150 mm or more. The upper limit is more preferably 230 mm or less, and even more preferably 210 mm or less. When the sheet length is equal to or greater than the above-mentioned lower limit, a decrease in the amount of water absorbed per product ply in a single kitchen towel sheet 10x can be effectively suppressed. When the sheet length is equal to or less than the above-mentioned upper limit, a decrease in the amount of water absorbed per product ply in a single kitchen towel sheet 10x can be effectively suppressed.

[0083] (embossed pattern) The kitchen towel roll 10 (kitchen towel sheet 10x) of this embodiment is preferably embossed to have an embossed pattern 11 (embossed with an embossed pattern 11). The kitchen towel sheet 10x is preferably laminated after the embossing process. When laminating, it is preferable to use, for example, plybond glue (adhesive) and apply the glue for adhesion. Water may also be used instead of plybond glue (adhesive).

[0084] It is preferable to apply the plybond glue to the backside of the embossed portion of the sheet on the front surface 10a of the two-ply kitchen towel sheet 10x (between the sheet on the front surface 10a and the sheet on the back surface 10b of the two-ply), and then laminate the two sheets together. In the case of a three-ply kitchen towel sheet, it is possible to emboss two layers on the front surface 10a and apply glue to the backside of the middle layer, or to emboss one layer on the front surface 10a and apply glue to the backside of the layer on the front surface 10a. Of these, it is preferable to emboss two layers on the front surface 10a and apply glue to the backside of the middle layer.

[0085] Fig. 4 is a diagram showing an example of an embossing pattern on a kitchen towel sheet 10x of this embodiment. Fig. 5 is a diagram showing an example of radial embossing 12 and closed-ring structure embossing 13 of an embossing pattern 11.

[0086] As shown in Figures 4 and 5, the kitchen towel sheet 10x is preferably embossed, and more preferably has an embossed pattern 11 in which two or more patterns are arranged at regular intervals. The embossed pattern 11 can more effectively improve the aesthetic appeal of the kitchen towel sheet 10x and the kitchen towel roll 10. The embossed pattern 11 is preferably provided on at least one ply (the ply on the surface 10a side of the kitchen towel sheet 10x). By providing the embossed pattern 11 on the kitchen towel sheet 10x, the amount of glue applied becomes more appropriate, making it easier to adhere the plies. In addition, the plies are less likely to peel off.

[0087] As shown in Figures 4 and 5, the embossed pattern 11 preferably includes radial embossments 12 and closed-ring structure embossments 13, and the radial embossments 12 and the closed-ring structure embossments 13 are preferably arranged alternately at equal intervals. The inclusion of the radial embossments 12 more effectively improves the water diffusion properties of the kitchen towel sheet 10x, while the inclusion of the closed-ring structure embossments 13 more effectively improves the water retention properties of the kitchen towel sheet 10x. Furthermore, the alternating arrangement of the radial embossments 12 and the closed-ring structure embossments 13 at equal intervals makes it difficult for water-based ink to adhere to the packaging film 2 even when the packaging film 2 and the kitchen towel roll 10 rub against each other. Furthermore, the inclusion of the radial embossments 12 and the closed-ring structure embossments 13 effectively prevents problems that would otherwise occur in an embossed pattern that does not include at least one of the radial embossments 12 and the closed-ring structure embossments 13, such as reduced aesthetic appeal and inappropriate glue application, leading to peeling. It is desirable that the embossed pattern 11 is not parallel to either the MD or CD.

[0088] The lines forming the embossed pattern 11 may be solid, broken, one-dot chain, or two-dot chain, and may be of any thickness. Among these, solid lines are more preferable, as this allows for better diffusion of absorbed moisture and better water retention.

[0089] (radial embossing) The overall shape of the radial embossments 12 is not particularly limited, but it is preferable that the embossments have a linear shape extending from the center outward (in a direction away from the center) or a plurality of linear embossments. When the embossing pattern 11 includes the radial embossments 12, water diffuses along the embossments, improving the water diffusibility of the kitchen towel sheet 10x.

[0090] (closed ring structure embossed) Like the radial embossments 12, the closed-ring structure embossments 13 are not particularly limited in overall shape, but preferably have a linear or geometric embossment in the center that surrounds the closed-ring structure on the outside. By including the closed-ring structure embossments 13 in the embossing pattern 11, water is effectively retained inside the embossments, improving the water retention of the kitchen towel sheet 10x.

[0091] (embossing depth) In the embossing pattern 11, the embossing depth is preferably 0.06 to 1.05 mm. The lower limit is more preferably 0.10 mm or more, and even more preferably 0.14 mm or more. The upper limit is more preferably 0.55 mm or less, and even more preferably 0.35 mm or less. When the embossing depth is equal to or greater than the above-mentioned lower limit, deterioration of the compactness of the kitchen towel roll 10 can be effectively suppressed when the roll density is low. On the other hand, when the embossing depth is equal to or less than the above-mentioned upper limit, adhesion of the water-based ink provided on the packaging film 2 to the kitchen towel roll 10 can be effectively prevented when the roll density is high.

[0092] The depth of the embossment is measured, for example, using a microscope. The microscope may be a Keyence Corporation product called the "One-Shot 3D Measuring Macroscope VR-3100." The microscope image observation, measurement, and image analysis software may be the "VR-H1A." The measurement conditions are a magnification of 25x and a field of view of 12mm x 9mm. The measurement magnification and field of view may be changed as appropriate depending on the desired size of the embossment.

[0093] FIG. 6 is a diagram showing the height profile on the XY plane as measured by a microscope using shading, FIG. 7 is a diagram showing the height profile on the XY plane as measured by a microscope using a graph, and FIG. 8 is a diagram showing how to determine the embossing depth for an embossing pattern.

[0094] Figure 6 shows a height profile on the XY plane taken with a microscope, with the height of the surface of the kitchen towel sheet 10x represented by shading. The linear areas in Figure 6 that are shading different from the surrounding area represent individual embossments. The depth of the embossment is determined by measuring the height difference of the embossment using the microscope.

[0095] The measurement is preferably performed on the surface 10a side of the kitchen towel sheet 10x. Furthermore, when measuring, three turns of the kitchen towel sheet 10x are removed from the kitchen towel roll 10, and the fourth turn of the kitchen towel sheet 10x is used for measurement without changing the number of plies. If there are perforations, these are avoided during the measurement.

[0096] First, a line segment AB is drawn as shown in Figure 6, and the height profile shown in Figure 7 is obtained. Note that the line segment AB should be drawn so that it crosses the embossments. The line segment AB is drawn in the roll width direction (axial direction, CD direction) of the kitchen towel sheet 10x. However, if the spacing between embossments is narrow, for example, 2 mm or less, and the height of the convex portions described below becomes low, the line segment may be drawn diagonally or in the roll winding direction.

[0097] The height profile is a (measured) cross-sectional curve V that represents the unevenness of the actual sample surface of the kitchen towel sheet 10x. However, the (measured) cross-sectional curve V also contains noise (steep peaks due to fiber clumps, whisker-like fibers, and fiber-free areas on the surface of the kitchen towel sheet 10x). When calculating the height difference of the unevenness, it is necessary to remove such noise peaks.

[0098] Therefore, the (measured) profile curve V in Figure 7 is smoothed using the filter size of the weighted average radio button, ±12, to obtain the profile curve W in Figure 8. Note that smoothing using the filter of the weighted average radio button can be achieved automatically using the analysis software described above. Then, in the graph shown in Figure 8, the average of the maximum values ​​on the vertical axis of the convex portion H1 and the convex portion H2 adjacent to the convex portion H1 is calculated, and the minimum value on the vertical axis of the concave portion D1 sandwiched between the convex portions H1 and H2 is found. The value obtained by subtracting the minimum value from the average of the maximum values ​​thus found is used as the provisional emboss depth.

[0099] Furthermore, as shown in Figure 8, similar measurements are taken at two consecutive locations on the cross-sectional curve W (the recess D1 and the recess D2 sandwiched between the protrusions H3 and H4). (At this point, two measurement results are obtained.) Then, the kitchen towel roll 10 is rotated three times by 90 degrees in the direction of the roll of the kitchen towel sheet 10x, and similar measurements are taken at each position (for a total of four measurement locations in the direction of the roll). The average value of the eight locations (2 x 4) is then used as the final embossing depth.

[0100] (embossed area ratio) The kitchen towel sheet 10x has an embossed pattern 11, and the embossed area ratio is preferably 4 to 30%. The lower limit is more preferably 6% or more, and even more preferably 8% or more. The upper limit is more preferably 25% or less, and even more preferably 15% or less. An embossed area ratio of 4% or more can effectively prevent deterioration of the compactness of the kitchen towel roll 10 when the roll density is low. An embossed area ratio of 30% or less can effectively prevent aqueous ink provided on the packaging film 2 from easily adhering to the kitchen towel roll 10 when the roll density is high.

[0101] The embossing area ratio is determined by measuring the surface 10a of the kitchen towel sheet 10x (the outer surface of the roll) that corresponds to the top 10% of the wrap of the kitchen towel roll 10 using a ruler or tape measure, measuring the area, and converting it into a percentage per unit area (area ratio). When the embossing is difficult to see with the naked eye or when the embossing width is narrow, it is preferable to measure the area using a microscope (VR-6000, manufactured by Keyence Corporation). The top 10% of the wrap of the kitchen towel roll 10 refers to the outermost 10% of the kitchen towel roll 10 (the portion closest to the roll surface). For example, if the length of the kitchen towel roll 10 is 30 m, this refers to the first 3 m of the roll.

[0102] The above area ratio is determined by the following procedure. (1) Inside a rectangle E that includes all of one embossing pattern 11 as shown in Figure 5, for embossments that are 0.1 mm or more and 4 mm or less in thickness and 5 mm or more in length, measure the total length by adding up the embossment lengths, and calculate the area of ​​the embossment by multiplying the total length (mm) by the thickness (mm). (2) If the thickness of the embossment is not uniform in (1), calculate the area of ​​each embossment by multiplying the length (mm) of the embossment by the thickness (mm), and then add up the areas of all the embossments. (3) The ratio of the embossed area to the area of ​​rectangle E in Figure 5 (length (mm) x width (mm)) is defined as (total embossed area / area of ​​rectangle E) x 100, which is the embossed area ratio (%). (4) If it is difficult to determine the embossed area ratio, the area ratio of the convex portions of the embossing roll used in embossing can be considered to be the area of ​​one sheet of kitchen towel sheet 10x. The area ratio of the convex portions of the embossing roll may not exactly match the area ratio of embossed pattern 11 because the base paper stretches after embossing or the measurement conditions for the area of ​​embossed pattern 11 vary, but since this is within the range of measurement error, the area ratio of the convex portions of the embossing roll can basically be considered to be the area ratio of embossed pattern 11.

[0103] The size of one side of this rectangle E can be changed as appropriate depending on the size of the embossed pattern 11. Furthermore, if a rectangle that includes all of the embossed patterns 11 includes an embossed pattern 11 adjacent to an embossed pattern 11 included in the rectangle, the length of that adjacent embossed pattern 11 is also measured and included in the total length. If the size of one side of rectangle E cannot be clearly determined by the embossed pattern 11, the size of rectangle E is set to 10 cm x 10 cm, and the total length of the embossments included in this rectangle E is measured. The total length is determined using the method described above.

[0104] (Uneven pattern resulting from the papermaking process) It is preferable that the kitchen towel sheet 10x according to this embodiment has a different uneven pattern resulting from the papermaking process than the embossed pattern 11. By having a different uneven pattern resulting from the papermaking process than the embossed pattern 11, the kitchen towel sheet 10x can have better water absorption. Furthermore, when such a kitchen towel sheet 10x is wound up into a kitchen towel roll 10, the contact area between its circumferential surface and the packaging film 2 is reduced, which effectively prevents water-based ink from adhering. The method for applying the uneven pattern resulting from the papermaking process will be described later.

[0105] Furthermore, because of the unevenness pattern resulting from the papermaking process, there is variation in the height of the convex portions on either side of the concave portion. Therefore, if the difference in the vertical axis between the convex portions sandwiching the concave portion (for example, convex portions H3 and H4 sandwiching concave portion D2) is 0.2 mm or more, measurements are taken at a location that avoids that portion.

[0106] There are no particular restrictions on whether the back surface 10b of the kitchen towel sheet 10x has an embossed pattern, as long as it has a pattern of protrusions and recesses resulting from the papermaking process that is different from the embossed pattern 11. Nested embossing or pin-to-pin embossing may be applied, or no embossing may be applied, but nested embossing or no embossing is preferred, and no embossing is more preferred.

[0107] Conventional kitchen towels ensure water absorption capacity using pin-to-pin or nested formats, but as mentioned above, when using thick base paper, embossing can cause the paper to become crushed, reducing water absorption capacity. For this reason, it is preferable that the front surface 10a of the kitchen towel sheet 10x according to this embodiment has linear embossing and the back surface 10b has no embossing.

[0108] <Method of manufacturing kitchen towel roll packaging> The kitchen towel roll packaging 1 is a film-packaged state in which three kitchen towel rolls 10, each of which is formed by rolling up a kitchen towel sheet 10x as described above, are arranged adjacent to each other with their axial directions parallel to each other.

[0109] The kitchen towel roll packaging 1 can be produced, for example, in the following order: (1) papermaking and creping, (2) embossing, (3) roll winding, and (4) film wrapping of three rolls. Note that TAD papermaking technology is preferably used in the production (papermaking) process of the kitchen towel sheet 10x.

[0110] FIG. 10 is a diagram showing a part of the papermaking process for the kitchen towel sheet of this embodiment.

[0111] In the papermaking process (1), a textured pattern derived from the papermaking process (fabric), different from the embossed pattern 11 described above, is preferably applied to the kitchen towel sheet 10x. "Derived from the papermaking process" means that the textured pattern is applied between the head box 41 of the papermaking machine and the outlet of the Yankee dryer 46 during the papermaking process of the kitchen towel sheet 10x. Specifically, in a portion of the papermaking process shown in FIG. 10, pulp slurry 40a is sprayed (supplied) from the head box 41 between the first fabric (forming fabric) 42 and the second fabric (textured fabric) 43, and is drawn onto the second fabric (textured fabric) 43 by the forming roll 44, forming a wet paper 40b. Next, the wet paper 40b is dried together with the second fabric (textured fabric) 43 in a through-air dryer 45, resulting in the formation of textured surfaces on the dried sheet 40c. Although FIG. 10 shows two through-air dryers 45, a single unit is also acceptable. Although a Yankee hood is shown above the Yankee dryer 46, the hood may be omitted. The Yankee dryer 46 may also be used to apply crepes.

[0112] The uneven pattern can be changed as needed by changing the fabric pattern (fine pattern, coarse pattern). Changing the uneven pattern will change the specific volume (paper thickness), but it is preferable to select a pattern that will bring the specific volume (paper thickness) of the base paper within the numerical range described below.

[0113] (2) In the embossing process, when a base paper made using a through-air dryer is used, the base paper is pressed by an embossing roll to form the embossed pattern 11. As described above, it is preferable that the embossing be provided only on the surface 10a of the kitchen towel sheet 10x.

[0114] In addition, in the case of (4) film packaging, the packaging form of the packaging film 2 is preferably caramel packaging as shown in Fig. 1. It is also preferable that the packaging form is gusset packaging (not shown).

[0115] When the packaging is caramel packaging, there are no particular restrictions on the equipment or process used, as long as they are known packaging equipment and processes capable of producing caramel packaging. For example, three kitchen towel rolls 10 are placed on a sheet-like packaging film 2 with their axial directions parallel to one another, and in this state, the packaging film 2 is wrapped around the periphery of the kitchen towel roll 10 to form a cylinder. The overlapping portions of both ends of the packaging film 2 on the periphery of the kitchen towel roll 10 are then preferably heat-sealed (not shown) along the axial direction (X direction).

[0116] Alternatively, for example, three kitchen towel rolls 10 arranged so that their axial directions are parallel to one another are raised from below the set sheet-like packaging film 2 to the sheet surface (lower surface side) of the packaging film 2. In this state, the packaging film 2 is wrapped around the circumferential surface of the kitchen towel roll 10 to form a cylinder, and the overlapping portions of both ends of the packaging film 2 that are on the circumferential surface of the kitchen towel roll 10 are preferably heat-sealed (not shown) along the axial direction (X direction).

[0117] When the packaging is gusset packaging, there are no particular limitations on the equipment or process used, as long as they are known packaging equipment or processes capable of gusset packaging. For example, it is preferable to gusset package three kitchen towel rolls 10 with packaging film 2 so that the packaging film 2 conforms to the surface shape of the roll product, thereby producing a three-roll package (kitchen towel roll package 1). [Example]

[0118] The present invention will be explained in more detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples in any way.

[0119] The kitchen towel roll packages of Examples 1 to 16 and Comparative Examples 1 to 9 were manufactured through the following steps: (1) papermaking and creping (Comparative Example 9 did not use a TAD, but instead used a general Yankee dryer (YD)), (2) embossing, (3) roll winding, and (4) film packaging. Then, for the kitchen towel roll packages of all Examples and Comparative Examples, various parameters were measured according to the methods described above. The measurement results are shown in Tables 1 and 2.

[0120] [Table 1]

[0121] [Table 2]

[0122] The kitchen towel roll packages of all Examples and Comparative Examples were evaluated as follows according to the methods described above. The embossing was only on the front side of the kitchen towel sheet, and the packages were made of three kitchen towel rolls wrapped in film, arranged adjacent to each other with their axial directions parallel to each other.

[0123] (Water absorption of kitchen towel sheets) The "water absorbency of the kitchen towel sheet" was evaluated by measuring the amount of water absorbed per unit area of ​​the kitchen towel sheet after production and rating it on a four-point scale. The evaluation criteria are as follows: ◎: Water absorption capacity is 380g / m 2 That was all. ○: Water absorption is 350g / m 2 More than 380g / m 2 It was less than. △: Water absorption is 300g / m 2 More than 350g / m 2 It was less than. ×: Water absorption is 300g / m 2 It was less than.

[0124] (Tightness of packaging) The "tightness of the packaging" was evaluated by 30 monitors who sensorily evaluated the tightness of the packaging, choosing either "good tightness" or "poor tightness," and rating it on a four-point scale based on the number of people who answered "good tightness." ◎: 28 or more people answered that the packaging was tight. ○: 25 to 27 people answered that the packaging was tight. △: 21 to 24 people answered that the packaging was tight. ×: The number of people who answered "The tightness of the packaging is good" was 20 or less.

[0125] (Compactness of kitchen towel rolls) The "compactness of kitchen towel rolls" was evaluated by 30 monitors who sensorily evaluated the compactness of the kitchen towel rolls, choosing either "good compactness" or "poor compactness," and rating the rolls on a four-point scale based on the number of people who answered "good compactness." ◎: 28 or more people answered that "compactness is good." ○: 25 to 27 people answered that "compactness is good." △: 21 to 24 people answered that the compactness was good. ×: The number of people who answered "compactness is good" was 20 or less.

[0126] (Difficulty in adhering ink to kitchen towel rolls in packaging) The evaluation of "resistance of ink to kitchen towel rolls" was carried out by 30 monitors who assessed the amount of ink attached to the inside of the packaging film of the kitchen towel roll package after manufacturing. The monitors held a kitchen towel roll package containing three rolls and rubbed the packaging film and kitchen towel roll together, choosing either "ink adhered to the kitchen towel roll" or "ink did not adhere to the kitchen towel roll." The evaluation was made on a four-point scale based on the number of people who answered "ink did not adhere to the kitchen towel roll." The evaluation criteria were as follows: ◎: More than 28 people answered that "ink did not stick to the kitchen towel roll." ○: 25 to 27 people answered that "ink did not stick to the kitchen towel roll." △: 21 to 24 people answered that "the ink did not stick to the kitchen towel roll." ×: The number of people who answered "The ink did not adhere to the kitchen towel roll" was 20 or less.

[0127] (Environmental aspects of packaging film) The "environmental aspects of packaging films" were evaluated on a two-point scale based on the type of ink (water-based or oil-based) used in the packaging film, with the rating being either "environmentally superior" or "environmentally inferior." ◎: Excellent environmental performance. ×: The environment was poor.

[0128] The results are shown in Tables 3 and 4. In each table, "roll density x C" is the "roll density" (g / cm 3 ) multiplied by the value of "C" (percentage, %).

[0129] [Table 3]

[0130] [Table 4]

[0131] From the above, it was at least confirmed that the kitchen towel roll package of this example has excellent water absorption properties for the kitchen towel sheet, good tightness of the package and compactness of the kitchen towel roll, water-based ink is less likely to adhere to the kitchen towel roll, and the packaging film is environmentally friendly. [Explanation of symbols]

[0132] 1...Kitchen towel roll packaging 2...Packaging film 3…Printing department 5...Kitchen towel roll packaging 6...First exterior film 10, 101, 102, 103...Kitchen towel rolls 10a…Surface 10b…Back side 10e: The outermost edge of a kitchen towel roll 10x kitchen towel sheets 11...Embossed pattern 12...Radial embossing 13... Closed ring structure embossing 20…Paper tube 40a...Pulp slurry 40b…Wet paper 40c...Dry sheet 41...Headbox 42...First fabric (forming fabric) 43...Second fabric (textured fabric) 44...Forming roll 45...Through air dryer 46... Yankee Dryer 200...test piece 200a...Corner 220…Holder

Claims

1. A kitchen towel roll package is a kitchen towel roll formed by winding up 2 to 3 plies of kitchen towel sheets into a roll, and the three rolls are arranged adjacent to each other so that the axial directions of the rolls are approximately parallel to each other and packaged in a film. The basis weight per product ply of the kitchen towel sheet is 30 to 56 g / m ２ and The water absorption per unit area of ​​the kitchen towel sheet is 300 to 610 g / m ２ and The kitchen towel roll has a winding diameter of 127 to 175 mm, The roll density of the kitchen towel roll is 0.04 to 0.13 g / cm ３ and The packaging film of the kitchen towel roll packaging body has a printed portion printed with water-based ink formed on the inner surface thereof, The kitchen towel roll package was placed so that the axial directions of the three kitchen towel rolls were horizontal, and a stainless steel first ruler having a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, and a scale length of 300 mm was placed across two adjacent kitchen towel rolls in a first direction perpendicular to the axial direction, with one long side of the first ruler positioned 25% of the axial length from both ends of the two adjacent kitchen towel rolls and at each of three central measurement points m, with the plate surface of the first ruler in contact with the packaging film to serve as a reference line. A second stainless steel ruler having a mass of 64 g, a thickness of 1.0 mm, a width of 25 mm, and a scale length of 300 mm is placed at the measurement point m on the packaging film located between the two adjacent kitchen towel rolls, perpendicular to the packaging film with the width direction of the second ruler aligned with the first direction and in contact with the long side of the first ruler. The distance from the reference line to the tip of the second ruler due to the weight of the second ruler is defined as distance d. The kitchen towel roll package has a sinking depth D of the packaging film measured by averaging the values ​​of the distance d at a total of 12 measurement points m on the front and back of the kitchen towel roll package, and the sinking depth D is 3 to 25 mm.

2. 2. The kitchen towel roll package according to claim 1, wherein the tightness of the kitchen towel roll is 1.0 to 5.0 mm.

3. 3. The kitchen towel roll package according to claim 1, wherein the kitchen towel sheet has a paper thickness per product ply of 0.40 to 0.80 mm.

4. 3. The kitchen towel roll package according to claim 1, wherein the percentage of the actual circumference of the film relative to the theoretical circumference of the packaging film calculated from the winding diameter of the kitchen towel roll ((actual film circumference / theoretical circumference of packaging film) x 100(%)) is 94 to 102%.

5. 3. The kitchen towel roll package of claim 1, wherein the three-roll package is a caramel package.

6. 3. The kitchen towel roll package of claim 1, wherein the three rolls are packaged in a gusseted package.

7. 3. The kitchen towel roll package according to claim 1, wherein the kitchen towel sheet has an uneven pattern derived from the papermaking process, which is different from the embossed pattern.

8. The specific volume of the kitchen towel sheet is 7 to 23 cm ３ 3. The kitchen towel roll package of claim 1, wherein the kinematic viscosity is 1 / g.

9. The kitchen towel roll package according to claim 1 or 2, wherein the kitchen towel roll has a roll length of 18 to 45 m.

10. 5. The kitchen towel roll package of claim 4, wherein the product of the roll density of the kitchen towel roll and the percentage of the actual circumference of the packaging film relative to the theoretical circumference of the film is 4 to 12.

11. 3. The kitchen towel roll package according to claim 1, wherein the kitchen towel sheet has an embossed pattern, and the embossed area ratio is 4 to 30%.

12. The kitchen towel roll package according to claim 1 or 2, wherein the thickness of the packaging film is 18 to 52 μm.

13. 3. The kitchen towel roll package according to claim 1, wherein the kitchen towel sheet contains wet pulp, and the wet pulp content is 60% by mass or more.

14. the three rolls are arranged so that the centers of the rolls are substantially aligned in a straight line when viewed from above, 3. The kitchen towel roll packaging of claim 1, wherein, for at least one of the two rolls not located in the center of the three rolls, when viewed from above, the printed portion of the packaging film does not contact a peripheral wall surface corresponding to an arc within 30 degrees from the intersection of the outer periphery of the roll and an extension line connecting the centers of the three rolls.

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