Kitchen towel roll package

Abstract

To provide a kitchen towel roll package that maintains the quality of a kitchen towel roll even when a long kitchen towel roll is packaged in wrapping paper, and is easy to hold as the wrapping paper is not easily torn when held by hand.SOLUTION: A kitchen towel roll package is made by winding up a 2-ply or 3-ply kitchen towel sheet into a roll, and wrapping two rolls side by side so that the axial directions are approximately parallel in wrapping paper. The wrapping paper has a burst strength of 130 kPa to 230 kPa, the roll length of the kitchen towel roll is 24 m to 50 m, the roll weight is 240 g to 640 g, the winding density is 0.42 m / cm2 to 0.99 m / cm2, the roll density is 0.10 g / cm3 to 0.27 g / cm3, and the paper thickness of the kitchen towel sheet is 1.7 mm / 10 ply to 3.7 mm / 10 ply.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Thick paper or nonwoven fabric products such as kitchen towels and paper towels are often sold in rolls.

[0003] Such kitchen towel rolls may also be sold in packages of one or more wrapped in film or paper.

[0004] For example, Patent Document 1 discloses a packaging body for such a kitchen towel roll wrapped in paper, which includes a paper base material for packaging multiple rolls of sanitary tissue paper, and in which a heat sealing agent is applied to the surface of the paper base material that comes into contact with the multiple rolls of sanitary tissue paper, except for the areas where the corners formed by the peripheral surface and the top or bottom surface of the roll of sanitary tissue paper come into contact with the paper base material. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2023-147577 Summary of the Invention [Problem to be solved by the invention]

[0006] In recent years, kitchen towel rolls have become longer in length to reduce replacement frequency, save space, and reduce logistics costs.

[0007] Short kitchen towel rolls were relatively easy to package in paper packaging, but when trying to package long kitchen towel rolls, the rolls are heavy and hard, so they tend to bump into each other. When rolls bump into each other, the embossed surface of the kitchen towel sheet is crushed, making the sheet thinner and potentially making it impossible to maintain the previous quality.

[0008] Furthermore, as the length of the kitchen towel roll increases, the weight of the roll also increases and the diameter of the roll also increases. Therefore, if the roll is wrapped in paper, it becomes difficult to hold in your hand and your fingers may dig into the wrapping, making it more likely to tear.

[0009] To provide a kitchen towel roll package that has been made in view of the above circumstances, and that maintains the quality of a kitchen towel roll even when a long kitchen towel roll is packaged in a wrapping paper, and is easy to hold because the wrapping paper is not easily torn when held by hand. [Means for solving the problem]

[0010] After extensive research, the inventors discovered that in a kitchen towel roll package made by winding two or three ply kitchen towel sheets into a roll, two adjacent rolls are arranged side by side with their axial directions approximately parallel and then wrapped in wrapping paper, by setting the burst strength of the wrapping paper, the winding length, roll weight, winding density, and roll density of the kitchen towel roll, and the thickness of the kitchen towel sheets all within specified numerical ranges, the quality of the kitchen towel roll can be maintained even when a long kitchen towel roll is wrapped in wrapping paper, the wrapping paper is less likely to tear when held in the hand, and the kitchen towel roll package is easy to hold, thereby solving the above-mentioned problems and leading to the completion of the present invention.

[0011] (1) The first aspect of the present invention is a kitchen towel roll package, in which two kitchen towel rolls, each made of a two-ply or three-ply kitchen towel sheet, are wound into a roll, and the two rolls are arranged adjacent to each other so that their axial directions are approximately parallel, and then wrapped in wrapping paper. The wrapping paper has a burst strength of 130 kPa or more and 230 kPa or less, and the roll length of the kitchen towel roll is 24 m or more and 50 m or less, the roll weight is 240 g or more and 640 g or less, and the winding density is 0.42 m / cm. 2 Over 0.99m / cm 2 Below, roll density is 0.10 g / cm 3 More than 0.27g / cm 3 and the paper thickness of the kitchen towel sheet is 1.7 mm / 10 ply or more and 3.7 mm / 10 ply or less.

[0012] (2) A second aspect of the present invention is the kitchen towel roll packaging according to (1), wherein the basis weight of the packaging paper is 45 g / m 2 More than 80g / m 2 It is characterized by the following:

[0013] (3) A third aspect of the present invention is a kitchen towel roll packaging body according to (1) or (2), characterized in that the basis weight of the wrapping paper divided by the roll density of the kitchen towel roll is 205 or more and 535 or less.

[0014] (4) A fourth aspect of the present invention is a kitchen towel roll packaging body according to (1) or (2), characterized in that the basis weight of the wrapping paper divided by the winding density of the kitchen towel roll is 55 or more and 145 or less.

[0015] (5) A fifth aspect of the present invention is a kitchen towel roll packaging body according to (1) or (2), characterized in that the weight of two rolls of the kitchen towel roll divided by the bursting strength of the wrapping paper is 3.0 or more and 7.5 or less.

[0016] (6) A sixth aspect of the present invention is a kitchen towel roll package according to (1) or (2), characterized in that the roll diameter of the kitchen towel roll is 105 mm or more and 135 mm or less.

[0017] (7) A seventh aspect of the present invention is the kitchen towel roll package according to (1) or (2), wherein the basis weight per product ply of the kitchen towel sheet is 30 g / m 2 More than 60g / m 2 It is characterized by the following:

[0018] (8) The eighth aspect of the present invention is the kitchen towel roll package according to (1) or (2), wherein the water absorption per unit area of ​​the kitchen towel sheet is 145 g / m 2 More than 220g / m 2 It is characterized by the following: [Effects of the Invention]

[0019] According to the present invention, it is possible to provide a kitchen towel roll package that maintains the quality of the kitchen towel roll even when a long kitchen towel roll is packaged in wrapping paper, and that is easy to hold because the wrapping paper is not easily torn when held by hand. [Brief explanation of the drawings]

[0020] [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. 1 is a perspective view of a kitchen towel roll according to an embodiment of the present invention. [Figure 3] FIG. 2 is a diagram showing a method for measuring the water absorption of the kitchen towel sheet of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] 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.

[0022] 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."

[0023] <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.

[0024] As shown in FIG. 1, the kitchen towel roll package 1 of this embodiment is a kitchen towel roll 10 made by winding up a two-ply or three-ply kitchen towel sheet 10x into a roll, and the two rolls are arranged adjacent to each other with their axial directions approximately parallel, and packaged in wrapping paper 2.

[0025] The packaging body 1 may have perforations (not shown) to make it easier to tear and open the packaging paper 2. For example, the perforations may be provided parallel to the axial direction in a portion of the packaging paper 2 that does not contact the kitchen towel roll 10, or may be provided parallel to the axial direction on the side surface of the packaging body 1 other than the portion (not shown). The perforations may also be provided perpendicular to the axial direction, for example, on the top or bottom surface of the packaging body 1, perpendicular to the axial direction and in a direction connecting the centers of the axes of the two kitchen towel rolls 10 arranged side by side (not shown). Furthermore, the perforations may be provided on the side surface of the packaging body 1, perpendicular to the axial direction and along the circumferential direction of the packaging paper 2 (not shown). The length of the perforations may be freely set.

[0026] <Wrapping paper> The wrapping paper 2 preferably includes at least a paper base material, and may include other layers such as a laminate layer or a heat seal layer. Furthermore, the paper base material may be printed on the outer surface when formed into the packaging body 1. It is preferable that the wrapping paper 2 is mainly made of the paper base material except for the adhesive portions described below, and more preferably is made of 100% paper base material.

[0027] The paper base material is produced using wood pulp as the main raw material. Examples of pulp that can be used include softwood kraft pulp, hardwood kraft pulp, groundwood pulp, thermomechanical pulp, chemithermomechanical pulp, and recycled paper pulp such as that used in newspapers, flyers, plain magazines, coated magazines, thermal recording paper, pressure-sensitive recording paper, construction paper, colored wood-free paper, copy paper, computer output paper, and mixtures of these recycled paper. These pulps may be used singly or in any combination ratio.

[0028] The pulp used in the paper base material of the packaging body 1 of the present invention is preferably 0% to 70% by weight of softwood kraft pulp and 30% to 100% by weight of hardwood kraft pulp, more preferably 10% to 60% by weight of softwood kraft pulp and 40% to 90% by weight of hardwood kraft pulp, and even more preferably 20% to 50% by weight of softwood kraft pulp and 50% to 80% by weight of hardwood kraft pulp. By using the above pulp blends, the packaging paper 2 is less likely to tear and the packaging body 1 can be obtained which is easy to hold by hand. Furthermore, unbleached pulp is preferred.

[0029] The pulp slurry may contain materials other than pulp fiber as secondary materials. In the packaging body 1, the pulp fiber content is usually preferably 70% by weight or more and 100% by weight or less, more preferably 80% by weight or more and 100% by weight or less, and even more preferably 90% by weight or more and 100% by weight or less. By setting the pulp content within the above range, it is possible to obtain a packaging body 1 in which the wrapping paper 2 is less likely to tear and which is easy to hold by hand.

[0030] The cooking method and bleaching method in the pulp production are not particularly limited.

[0031] In addition, various commonly used additives, such as wet strength agents, fillers, sizing agents, dry strength agents, retention aids, coloring pigments, etc., may be added to the paper base material as needed in appropriate amounts.

[0032] The wet strength improver can be selected from among commonly used known agents, and is preferably selected from, for example, polyamide-polyamine resins, polyacrylamide resins, melamine resins, etc. The amount of wet strength improver (mass in bone dry state) is usually 0.01 to 0.7% by weight, preferably 0.02 to 0.5% by weight, and more preferably 0.03 to 0.3% by weight, based on the mass of pulp (mass in bone dry state). If the amount of wet strength improver exceeds 0.7% by weight, it becomes difficult to obtain the effect commensurate with the amount, resulting in increased costs and reduced disintegration properties, which may make it difficult to reuse the packaging body 1 of the present invention. If the amount of wet strength improver is less than 0.01% by weight, it becomes difficult to obtain sufficient wet strength, and the packaging body 1 may be prone to tearing when wetted with water, resulting in poor functionality as a packaging body 1.

[0033] In the packaging body 1 of the present invention, the paper base material of the packaging paper 2 can be obtained by making paper from these raw materials using a normal papermaking process.

[0034] The wrapping paper 2 may have other layers in addition to the paper base material. Examples include a sealing layer and an adhesive layer for adhesion and sealing, but other layers include a laminate layer, a water vapor barrier layer, an oxygen barrier layer, a printing layer, a printability improving layer, an overprint layer, a light-shielding layer, etc. These other layers can be provided, for example, on the front or back side of the paper base material, and may consist of one layer or two or more layers.

[0035] (Basis weight of wrapping paper) The basis weight of the wrapping paper 2 is 45 g / m 2 More than 80g / m 2 The basis weight of the wrapping paper 2 is preferably 45 g / m or less. 2 If the basis weight of the wrapping paper 2 is less than 80 g / m, the wrapping paper 2 is likely to tear when the package 1 is held by hand. 2 If the temperature exceeds this range, the wrapping paper 2 becomes stiff and the wrapping body 1 becomes difficult to hold by hand. The lower limit of the basis weight of the wrapping paper 2 is more preferably 47 g / m 2 More preferably, it is 50 g / m or more. 2 The upper limit is more preferably 65 g / m 2 More preferably, it is 55 g / m or less. 2 The basis weight of the wrapping paper 2 can be measured in accordance with JIS P 8124.

[0036] (Thickness of wrapping paper) The lower limit of the thickness of the wrapping paper 2 is preferably 25 μm or more, more preferably 30 μm or more, and even more preferably 35 μm or more. The upper limit is preferably 75 μm or more, more preferably 70 mm or less, and even more preferably 65 μm or less. If the thickness of the wrapping paper 2 is less than 25 μm, the wrapping paper 2 is likely to tear when the package 1 is held by hand. If the thickness of the wrapping paper 2 exceeds 75 μm, the wrapping paper 2 becomes stiff, making it difficult to hold the package 1 by hand. The thickness of the wrapping paper 2 is measured in accordance with JIS P 8118 at a pressure of 100 kPa.

[0037] (Burst strength of wrapping paper) The bursting strength of the wrapping paper 2 is 130 kPa or more and 230 kPa or less. If the bursting strength is less than 130 kPa, the wrapping paper 2 is likely to tear when the package 1 is held by hand. If the bursting strength exceeds 230 kPa, the wrapping paper 2 becomes stiff, making it difficult to hold the package 1 by hand. The lower limit of the burst strength of the wrapping paper 2 is preferably 135 kPa or more, more preferably 145 kPa or more. The upper limit is preferably 200 kPa or less, more preferably 170 kPa or less. The burst strength of the wrapping paper 2 can be measured in accordance with JIS P 8112.

[0038] <Kitchen towel roll> FIG. 2 is a perspective view of the kitchen towel roll 10 according to this embodiment.

[0039] As shown in Figure 2, kitchen towel roll 10 according to this embodiment is a kitchen towel roll 10 in which kitchen towel sheet 10x is wound around a paper tube 11 (hereinafter also referred to as a core) and wound into a roll. Preferably, kitchen towel sheet 10x is perforated in the roll width direction at approximately equal intervals in the winding direction of the roll (not shown).

[0040] 2, 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.

[0041] The kitchen towel roll 10 can be used, for example, as a roll of kitchen paper (sometimes called paper towel or cooking paper) used in home kitchens, restaurant kitchens, etc. to wipe away moisture or oil, remove dirt, etc. (kitchen paper roll), as well as other rolls of sanitary paper.

[0042] (winding length and winding diameter) The roll length of the kitchen towel roll 10 is 24 m or more and 50 m or less. If the roll length is less than 24 m, the roll diameter DR becomes small, which can easily dig into the fingers and cause the wrapping paper 2 to tear when the wrapping body 1 is held by hand. If the roll length exceeds 50 m, the roll diameter DR becomes too large, making the wrapping body 1 difficult to hold by hand. The lower limit of the roll length of the kitchen towel roll 10 is preferably 25 m or more, more preferably 26 m or more, and the upper limit is preferably 40 m or less, more preferably 30 m or less.

[0043] The roll length is 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.

[0044] Furthermore, the roll diameter DR of the kitchen towel roll 10 is preferably 105 mm or more and 135 mm or less. If the roll diameter DR is less than 105 mm, the roll diameter DR is too small and fingers can easily get caught, making the wrapping paper 2 more likely to tear when the packaging body 1 is held by hand. If the roll diameter DR exceeds 135 mm, the roll diameter DR is too large and makes the packaging body 1 difficult to hold by hand. The lower limit of the roll diameter DR of the kitchen towel roll 10 is more preferably 110 mm or more, and even more preferably 115 mm or more, and the upper limit is more preferably 125 mm or less, and even more preferably 120 mm or less.

[0045] The roll winding diameter DR is measured using, for example, a diameter rule manufactured by Muratec KDS Co., Ltd. Two kitchen towel rolls 10 are measured, and the measurement results are averaged to obtain the value of the roll winding diameter DR.

[0046] (roll width and roll weight) The roll width of kitchen towel roll 10 has a lower limit of preferably 195 mm or more, more preferably 205 mm or more, and even more preferably 215 mm or more. The upper limit is preferably 285 mm or less, more preferably 255 mm or less, and even more preferably 235 mm or less. Having a roll width within the above range results in a moderate roll weight for kitchen towel roll 10, which makes wrapping paper 2 less likely to tear when held by hand, resulting in a package 1 that is easy to hold.

[0047] The roll weight of kitchen towel roll 10 is 240 g or more and 640 g or less. If the roll weight is less than 240 g, the resulting small winding diameter DR makes it easier for fingers to dig in, making wrapping paper 2 more likely to tear when package 1 is held by hand. If the roll weight exceeds 640 g, the roll weight becomes too heavy, making wrapping paper 2 more likely to tear when package 1 is held by hand. The lower limit of the roll weight of the kitchen towel roll 10 is preferably 290 g or more, more preferably 320 g or more, and the upper limit is preferably 500 g or less, more preferably 400 g or less.

[0048] In this case, the roll weight of kitchen towel roll 10 is the weight per 280 mm of roll width including the core (paper tube 11) of kitchen towel roll 10. If the roll width is not 280 mm, it is converted to the weight per 280 mm by proportional calculation.

[0049] The lower limit of the roll weight per 280 mm of roll width, excluding the core (paper tube 11) of the kitchen towel roll 10, is preferably 230 g or more, more preferably 280 g or more, and even more preferably 310 g or more. The upper limit is preferably 630 g or less, more preferably 490 g or less, and even more preferably 390 g or less. If the roll weight excluding the core is less than 230 g, the winding diameter DR becomes small, making it easier for fingers to dig in, and the wrapping paper 2 to tear when the package 1 is held by hand. If the roll weight excluding the core exceeds 630 g, the roll weight becomes too heavy, making the wrapping paper 2 to tear when the package 1 is held by hand.

[0050] Furthermore, the value obtained by dividing the weight of two rolls of kitchen towel roll 10 by the bursting strength of wrapping paper 2 is preferably 3.0 or more and 7.5 or less. If the value is less than 3.0, the resulting roll diameter DR becomes small, making it easier for fingers to dig in and making wrapping paper 2 more likely to tear when wrapping body 1 is held by hand. If the value exceeds 7.5, the resulting roll weight becomes too heavy, making wrapping paper 2 more likely to tear when wrapping body 1 is held by hand. The lower limit of the value obtained by dividing the weight of two rolls of kitchen towel roll 10 by the burst strength of wrapping paper 2 is preferably 3.6 or more, and more preferably 4.1 or more, and the upper limit is preferably 5.5 or less, and even more preferably 5.1 or less.

[0051] (roll density) Furthermore, the roll density of the kitchen towel roll 10 is 0.10 g / cm 3 More than 0.27g / cm 3 The roll density is 0.10 g / cm or less. 3 If the roll density is less than 0.27 g / cm, the kitchen towel roll 10 will be too soft and fingers will easily dig into it, resulting in the wrapping paper 2 being easily torn when the wrapping body 1 is held by hand. 3 If the thickness exceeds this, the kitchen towel roll 10 becomes too hard, making the package 1 difficult to hold by hand. The roll density of the kitchen towel roll 10 preferably has a lower limit of 0.13 g / cm 3 More preferably, it is 0.14 g / cm or more. 3 The upper limit is preferably 0.20 g / cm. 3 or less, more preferably 0.17 g / cm 3 The following is the result.

[0052] The roll density is expressed as (roll weight) ÷ (roll volume). The roll weight is the weight of the kitchen towel roll 10 per 280 mm roll width, not including the core. The 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 11)] × roll width (converted per 280 mm). For example, if the roll weight (not including the core) per 280 mm roll width is 342 g, the winding diameter DR is 119 mm, and the cardboard core outer diameter DI is 40 mm, the roll density = 342 g ÷ [{3.14 × (119 mm ÷ 2 ÷ 10) 2 -3.14×(40mm÷2÷10) 2}×(280mm÷10)]=0.12g / cm 3 This becomes:

[0053] Furthermore, it is preferable that the value obtained by dividing the basis weight of the wrapping paper 2 by the roll density of the kitchen towel roll 10 is 205 or more and 535 or less. If the value is less than 205, the wrapping paper 2 will be easily torn when the wrapping body 1 is held by hand. If the value exceeds 535, the wrapping paper 2 will be stiff, making the wrapping body 1 difficult to hold by hand. The lower limit of the value obtained by dividing the basis weight of the wrapping paper 2 by the roll density of the kitchen towel roll 10 is preferably 305 or more, and more preferably 335 or more. The upper limit is preferably 415 or less, and more preferably 365 or less.

[0054] (winding density) The winding density of the kitchen towel roll 10 is 0.42 m / cm 2 Over 0.99m / cm 2 The winding density of the kitchen towel roll 10 is 0.42 m / cm 2If the winding density of the kitchen towel roll 10 is less than 0.99 m / cm, the kitchen towel roll 10 will be too soft and fingers will easily dig into it, which will result in the wrapping paper 2 being easily torn when the wrapping body 1 is held by hand. 2 If the thickness exceeds this, the kitchen towel roll 10 becomes too hard, making the package 1 difficult to hold by hand. The winding density of the kitchen towel roll 10 preferably has a lower limit of 0.48 m / cm 2 More preferably, it is 0.53 m / cm or more. 2 The upper limit is preferably 0.68 m / cm 2 or less, more preferably 0.62 m / cm 2 The following is the result.

[0055] The winding density is expressed as (winding length × number of plies) ÷ (cross-sectional area of ​​the roll). The cross-sectional area of ​​the roll is expressed as {cross-sectional area of ​​the outer diameter part of the roll (winding diameter DR) - (cross-sectional area of ​​the cardboard tube outer diameter DI part of the cardboard tube 11)}. For example, in the case of a winding length of 27.5 m, 2 plies, a winding diameter DR of 119 mm, and a cardboard tube outer diameter DI of 40 mm, the winding density = (27.5 m × 2) ÷ {3.14 × (119 mm ÷ 2 ÷ 10)} 2 -3.14×(40mm÷2÷10) 2}=0.56m / cm 2 This becomes:

[0056] Furthermore, it is preferable that the value obtained by dividing the basis weight of the wrapping paper 2 by the winding density of the kitchen towel roll 10 is 55 or more and 145 or less. If the value is less than 55, the wrapping paper 2 is likely to tear when the wrapping body 1 is held by hand. If the value exceeds 145, the wrapping paper 2 becomes stiff, making the wrapping body 1 difficult to hold by hand. The lower limit of the value obtained by dividing the basis weight of the wrapping paper 2 by the winding density of the kitchen towel roll 10 is preferably 75 or more, and more preferably 85 or more. The upper limit is preferably 125 or less, and more preferably 105 or less.

[0057] (Paper tube) The kitchen towel roll 10 preferably has a paper tube 11 at its center that is parallel to the axial direction. The paper tube 11 is a core around which the kitchen towel sheet 10x is wound, and may have, for example, a generally cylindrical cross section. The paper tube 11 is made of multiple layers of base paper, and preferably two layers.

[0058] (Paper tube outer diameter) The lower limit of the paper tube outer diameter DI, which is the outer diameter of the paper tube 11 that forms the core of the kitchen towel roll 10, is preferably 25 mm or more, more preferably 30 mm or more, and even more preferably 35 mm or more. The upper limit is preferably 55 mm or less, more preferably 50 mm or less, and even more preferably 45 mm or less. If the paper tube outer diameter DI is less than 25 mm, the resulting reel diameter DR becomes small, making it easier for fingers to dig in and for the wrapping paper 2 to tear when the wrapping body 1 is held by hand. If the paper tube outer diameter DI exceeds 55 mm, the resulting reel diameter DR becomes large, making it difficult to wrap. 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 by measuring two kitchen towel rolls 10 and averaging the measurement results.

[0059] (Paper tube weight) Furthermore, the weight of the paper tube 11, which is the core of the kitchen towel roll 10, preferably has a lower limit of 5.0 g or more, more preferably 6.0 g or more, and even more preferably 7.0 g or more. The upper limit is preferably 20 g or less, more preferably 15 g or less, and even more preferably 12 g or less. If the paper tube weight is less than 5.0 g, the reel diameter DR becomes small, making it easier for fingers to dig in and for the wrapping paper 2 to tear when the wrapping body 1 is held by hand. If the paper tube weight exceeds 20 g, the reel diameter DR becomes large, making it difficult to hold. The paper core weight is the weight of the core (paper core) per 280 mm roll width of the kitchen towel roll 10, and if the roll width is not 280 mm, it is converted to the weight per 280 mm by proportional calculation.

[0060] <Kitchen towel sheet> The kitchen towel sheet 10x according to this embodiment is a two-ply or three-ply sheet, and is preferably a two-ply sheet.

[0061] The kitchen towel sheet 10x preferably contains wet pulp. The wet pulp content is preferably 50% or more, more preferably 65% ​​or more, and even more preferably 80% or more. A kitchen towel sheet 10x containing wet pulp has better water absorption than one containing dry pulp. Furthermore, since the strength of the kitchen towel sheet 10x can be easily increased, crushing of the embossing caused by the kitchen towel rolls 10 colliding with each other can be more effectively prevented. When the wet pulp content is above the lower limit, the quality of the kitchen towel sheet 10x can be easily maintained and crushing of the embossing can be more effectively prevented.

[0062] As the pulp, for example, softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), etc. can be used, and the content ratio thereof is preferably NBKP:LBKP=0-70% by mass:30-100% by mass, more preferably NBKP:LBKP=10-60% by mass:40-90% by mass, and even more preferably NBKP:LBKP=20-50% by mass:50-80% by mass.

[0063] (Basic weight) The basis weight per product ply of the kitchen towel sheet 10x according to this embodiment is 30 g / m 2 More than 60g / m 2 The basis weight per product ply is preferably 30 g / m or less. 2 If the basis weight per ply of the product is less than 60 g / m, the bulkiness of the kitchen towel sheet 10x will be poor. 2 If the weight exceeds this value, the roll weight will become heavy, and the wrapping paper 2 will be more likely to tear when the wrapping body 1 is held by hand. The lower limit of the basis weight per product ply of the kitchen towel sheet 10x is more preferably 35 g / m 2More preferably, it is 40 g / m or more. 2 The upper limit is more preferably 50 g / m 2 More preferably, it is 45 g / m or less. 2 The basis weight of the kitchen towel sheet 10x can be measured based on JIS P 8124, but the 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 increasing them).

[0064] (Water absorption) In this embodiment, the water absorption per unit area of ​​the kitchen towel sheet 10x is 145 g / m 2 More than 220g / m 2 The water absorption per unit area is preferably 145 g / m or less. 2 If the thickness is less than 220g / m, the kitchen towel sheet 10x will have poor bulk. 2 If the weight exceeds this value, the roll weight will become heavy, and the wrapping paper 2 will be more likely to tear when the wrapping body 1 is held by hand. The lower limit of the water absorption per unit area of ​​the kitchen towel sheet 10x is more preferably 150 g / m 2 More preferably, it is 155 g / m or more. 2 The upper limit is more preferably 200 g / m 2 More preferably, it is 180 g / m or less. 2 The following is the result.

[0065] FIG. 3 is a diagram showing a method for measuring the water absorption of the kitchen towel sheet 10x according to this embodiment.

[0066] The water absorption per unit area when the kitchen towel sheet 10x is two-ply is measured as follows. First, a two-ply kitchen towel sheet 10x is taken and cut using a square template with each piece measuring 7.6 cm (3 inches) to prepare a rectangular test piece 20 with each side measuring 7.6 cm. The weight of the test piece 20 before water absorption is measured using an electronic balance. The test piece 20 is set in a holder 22 (a jig that fixes three points of the test piece 20, made of a metal that does not absorb water).

[0067] Next, distilled water is poured into a commercially available tray to a depth of 2 cm, and the test piece 20 set in the holder 22 is immersed in the distilled water for 2 minutes. After immersion for 2 minutes, the test piece 20 and the holder 22 are removed from the distilled water, and as shown in Figure 3, a strip 21 is attached to one corner 20d of the test piece 20. The strip 21 is made by peeling off a single ply of kitchen towel identical to the two plies of kitchen towel to be measured, cutting this single ply of paper kitchen towel into a size of 2 mm x 15 mm, and attaching it to a portion of the test piece 20 6 mm from the corner 20d toward the center. Next, the holder 22 and test piece 20 are hung from a rod placed in an empty water tank with the corner 20a opposite the corner 20d facing up, and the lid of the water tank is closed and left for 15 minutes.

[0068] Thereafter, the holder 22 and the test piece 20 are taken out of the water tank, the band 21 and the holder 22 are removed, and the weight of the test piece 20 is measured with an electronic balance. From the change in weight of the test piece 20 before and after immersion in distilled water, the amount of distilled water absorbed per unit area of ​​the test piece 20 (g of water / sheet m 2 , 1m 2 Hit. Abbreviated as g / m 2 ) is calculated. Measurements are carried out five times for each sample, and the average value is used.

[0069] When the kitchen towel sheet 10x is a 3-ply sheet, it is preferable to measure it in the same manner as when it is a 2-ply sheet. This measurement is carried out in accordance with JIS P 8111 at a temperature of 23±1°C and humidity of 50±2%. The distilled water is kept at 23±1°C.

[0070] (seat length) The sheet length between perforations (the length of the kitchen towel sheet 10x in the roll winding direction) has a lower limit of preferably 200 mm or more, more preferably 210 mm or more, and even more preferably 220 mm or more. The upper limit is preferably 270 mm or less, more preferably 260 mm or less, and even more preferably 250 mm or less. Having a sheet length within the above range results in an appropriate roll diameter DR and roll weight for the kitchen towel roll 10, which makes the wrapping paper 2 less likely to tear when held by hand, resulting in a package 1 that is easy to hold.

[0071] (specific volume) The specific volume of a 10x kitchen towel sheet should preferably be less than 7.0 cm 3 / g or more, and more preferably 7.5 cm 3 / g or more, more preferably 8.5 cm 3 / g or more. The upper limit is preferably 17 cm 3 / g or less, and more preferably 16 cm 3 / g or less, and more preferably 15 cm 3 / g or less. When the sheet length is within the above range, the bulkiness of the kitchen towel sheet 10x is good, and as a result, the roll diameter DR and roll weight of the kitchen towel roll 10 are appropriate, so that the wrapping paper 2 is less likely to tear when held by hand, making the package 1 easy to hold. The specific volume is calculated by dividing the paper thickness per ply of a 10x kitchen towel sheet by the basis weight per ply, and then calculating the volume cm per g. 3 It is expressed as:

[0072] (paper thickness) The paper thickness of the kitchen towel sheet 10x is 1.6 mm / 10 ply or more and 3.7 mm / 10 ply or less. If the paper thickness is less than 1.6 mm / 10 ply, the kitchen towel sheet 10x will have poor bulk. If the paper thickness is more than 3.7 mm / 10 ply, the roll weight will be heavy, making the wrapping paper 2 more likely to tear when the package 1 is held by hand. The paper thickness of the kitchen towel sheet 10x has a lower limit of preferably 2.0 mm / 10 plies or more, more preferably 2.3 mm / 10 plies or more, and an upper limit of preferably 3.4 mm / 10 plies or less, more preferably 3.1 mm / 10 plies or less.

[0073] The paper thickness can be measured using a thickness gauge (a dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 38 gf / cm 2 The gauge head has a diameter of 30 mm, and the sample is placed between the gauge head and the measuring table. The gauge is read when the gauge head is lowered at a speed of 1 mm per second or less. The sample is 10x kitchen towel sheets, 10 plies in total (5 sets for 2 plies, 3 sets for 3 plies, and the value is proportionally calculated to 10 plies). The measurement is also repeated 10 times at different locations, and the results are averaged.

[0074] (embossed pattern) The kitchen towel roll 10 (kitchen towel sheet 10x) of this embodiment is preferably embossed and has an embossed pattern (has an embossed pattern applied). Either single embossing or double embossing is acceptable, but double embossing is preferred, and nested embossing is also preferred. The kitchen towel sheet 10x is preferably embossed as a single-ply sheet and then laminated onto two or more plies. When laminating, it is preferable to use, for example, plybond glue (adhesive) and apply the glue for adhesion. Water may be used instead of plybond glue (adhesive).

[0075] 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.

[0076] The ply on the front surface 10a of the kitchen towel sheet 10x preferably has an embossed pattern. By providing an embossed pattern on the front surface 10a, glue can be applied to the embossed portion and two or more plies can be laminated. The sheet on the back surface 10b preferably has an embossed pattern, but does not necessarily have an embossed pattern. Having an embossed pattern on the back surface 10b allows the quality of the kitchen towel sheet 10x (kitchen towel roll 10) to be maintained even when it is long. The embossed pattern is not particularly limited as long as it is a pattern commonly used on kitchen towels, such as a dotted or linear pattern, but a dotted embossed pattern is particularly preferred. A dotted embossed pattern can more effectively prevent damage when the rolls rub against each other.

[0077] <Method of manufacturing kitchen towel roll packaging> The kitchen towel roll packaging 1 can be produced, for example, in the following order: (1) papermaking and creping, (2) embossing, (3) winding into a roll, and (4) wrapping two rolls in wrapping paper. Note that dry crepe papermaking technology is preferably used in the manufacturing (papermaking) process of the kitchen towel sheet 10x.

[0078] In addition, (4) in the case of packaging with a wrapping paper, the wrapping form of the wrapping paper 2 is preferably a caramel wrapping as shown in FIG.

[0079] When the packaging is caramel-flavored, there are no particular limitations on the equipment or process used, so long as they are known packaging equipment and processes capable of producing caramel-flavored packaging. For example, two kitchen towel rolls 10 are placed on a sheet of wrapping paper 2, and the wrapping paper 2 is then wrapped around the kitchen towel roll 10 to form a cylindrical shape, or two kitchen towel rolls 10 are inserted coaxially into one axial end of a pre-formed cylindrical wrapping paper 2. Then, of the wrapping paper 2 extending beyond both ends of the two kitchen towel rolls 10, two opposing flap-shaped edges are preferably folded toward each other, and then the other two opposing flap-shaped edges are similarly folded toward each other, and these folded portions are preferably adhered together with a hot-melt adhesive or the like. [Example]

[0080] 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.

[0081] The kitchen towel roll packages of Examples 1 to 13 and Comparative Examples 1 to 6 were manufactured through the following processes: (1) papermaking and creping, (2) embossing, (3) roll winding, and (4) packaging in wrapping paper. The kitchen towel roll packages of all Examples and Comparative Examples were measured for various parameters according to the methods described above, and the following evaluations were also carried out according to the methods described above. The embossing was only on the front side of the kitchen towel sheet, and the package consisted of two kitchen towel rolls arranged adjacent to each other with their axial directions parallel to each other, wrapped in wrapping paper.

[0082] (Sheet bulk) The bulkiness of the kitchen towel sheet taken out of the package was evaluated on a four-point scale based on the measured paper thickness, with a score of 2 or higher being considered acceptable. 4: Paper thickness is 2.3mm / 10 ply or more 3: Paper thickness is 2.0mm / 10 ply or more, less than 2.3mm / 10 ply 2: Paper thickness is 1.7mm / 10 ply or more, and less than 2.0mm / 10 ply 1: Paper thickness is less than 1.7mm / 10 ply

[0083] (Resistant to tearing of wrapping paper) Thirty monitors performed a sensory evaluation of the tear resistance of the wrapping paper when holding the package in their hands, choosing either "the wrapping paper is difficult to tear" or "the wrapping paper is easy to tear." The number of people who answered "the wrapping paper is difficult to tear" was used to evaluate the wrapping paper on a four-point scale, with a score of 2 or above being considered a pass. 4: More than 27 people felt that the wrapping paper was difficult to tear. 3: The number of people who felt that the wrapping paper was difficult to tear was between 23 and 26. 2: The number of people who felt that the wrapping paper was difficult to tear was between 18 and 22. 1: Fewer than 15 people felt that the wrapping paper was difficult to tear.

[0084] (Easy to hold the packaging) Thirty monitors performed a sensory evaluation of the ease of holding the packaging, choosing between "the packaging is easy to hold in the hands" and "the packaging is difficult to hold in the hands." The number of people who answered "the packaging is easy to hold in the hands" was used to evaluate the product on a four-point scale, with a score of 2 or above being considered a pass. 4: More than 27 people felt that the packaging was easy to hold in their hands. 3: The number of people who felt that the packaging was easy to hold in their hands was between 23 and 26. 2: The number of people who felt that the packaging was easy to hold in their hands was between 18 and 22. 1: Fewer than 15 people felt that the packaging was easy to hold in their hands.

[0085] The results obtained are shown in Tables 1 to 3. [Table 1]

[0086] [Table 2]

[0087] [Table 3]

[0088] From the above, it was confirmed that the kitchen towel roll of this example maintains the quality of the kitchen towel roll even when a long kitchen towel roll is wrapped in wrapping paper, and is an easy-to-hold kitchen towel roll package in which the wrapping paper is less likely to tear when held in the hand. [Explanation of symbols]

[0089] 1. Kitchen towel roll packaging 2 wrapping paper 10 kitchen towel rolls 10a surface 10b back side 10e The outermost edge of a kitchen towel roll 10x kitchen towel sheets 11 Paper tube 20 test specimens 20a,20d corner 21 Obi 22 Holder

Claims

1. A kitchen towel roll package is formed by winding two or three ply kitchen towel sheets into a roll, and wrapping two rolls of the rolls in wrapping paper in a state where the axial directions of the rolls are substantially parallel to each other. The burst strength of the wrapping paper is 130 kPa or more and 230 kPa or less, The kitchen towel roll has a winding length of 24 m or more and 50 m or less, a roll weight of 240 g or more and 640 g or less, and a winding density of 0.42 m / cm ２ More than 0.99 m / cm ２ Below, the roll density is 0.10 g / cm ３ 0.27g / cm or more ３ is as follows: The kitchen towel roll package is characterized in that the paper thickness of the kitchen towel sheet is 1.7 mm / 10 plies or more and 3.7 mm / 10 plies or less.

2. The basis weight of the wrapping paper is 45 g / m ２ 80g / m or more ２ 2. The kitchen towel roll package of claim 1, wherein:

3. 3. The kitchen towel roll package according to claim 1, wherein the basis weight of the wrapping paper divided by the roll density of the kitchen towel roll is 205 or more and 535 or less.

4. 3. The kitchen towel roll package according to claim 1, wherein the basis weight of the wrapping paper divided by the winding density of the kitchen towel roll is 55 or more and 145 or less.

5. 3. The kitchen towel roll package according to claim 1, wherein the weight of two rolls of the kitchen towel roll divided by the bursting strength of the wrapping paper is 3.0 or more and 7.5 or less.

6. 3. The kitchen towel roll package according to claim 1, wherein the roll diameter of the kitchen towel roll is 105 mm or more and 135 mm or less.

7. The basis weight of the kitchen towel sheet per product ply is 30 g / m ２ 60g / m or more ２ 3. The kitchen towel roll packaging of claim 1 or 2, wherein:

8. The water absorption capacity per unit area of ​​the kitchen towel sheet is 145 g / m ２ More than 220g / m ２ 3. The kitchen towel roll packaging of claim 1 or 2, wherein:

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