Kitchen towel roll

Abstract

To provide a kitchen towel roll which is excellent in adhesion between plies, reduces the number of times of roll cleaning, and can suppress the deterioration of decorativeness by suppressing the adhesion of paste refuse.SOLUTION: The present disclosure provides a kitchen towel roll 1 comprising a kitchen towel sheet 1x formed by laminating multiple plies of sheets, at least one of which has an embossed pattern, and bonding them with glue, in which the resulting laminated plies are wound around a core 1d into a roll, the number of plies is 2 to 4, the basis weight per ply is 16.0 to 26.0 g / m2, the paper thickness is 2.0 mm / 10 plies to 4.0 mm / 10 plies, the glue contains carboxymethyl cellulose, the ply peel strength is 6.0 cN / 76 mm to 35.0 cN / 76 mm, and the root mean square height of the surface roughness in the areas not bearing the embossed pattern is 30 μm to 130 μm.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to kitchen towel rolls. [Background technology]

[0002] Kitchen towels are becoming longer in length, but for high-end products, there is a high demand for quality in addition to longer lengths. Among high-end products, kitchen towel sheets made using the so-called TAD (Through Air Dryer, Through Air Drying) papermaking technology are thick, soft to the touch, and have excellent water absorbency.

[0003] As a technology relating to papermaking technology using through-air drying, Patent Document 1 discloses an uncreped through-air dried tissue sheet having about 10 to about 150 protrusions per 6.45 square centimeters (1 square inch) with a height of about 0.012 millimeters (0.005 inches) or more, a cross-machine direction elongation rate of about 9 percent or more, and a basis weight of about 10 to 70 grams per square meter. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3758702 Summary of the Invention [Problem to be solved by the invention]

[0005] While kitchen towel sheets obtained using TAD papermaking technology have excellent water absorption, their uneven surface necessitates an increased amount of glue to bond the plies together. Increasing the amount of glue can cause strike-through, where the glue penetrates the sheet, and increase the amount of glue residue (a mixture of glue and paper dust) that adheres to the roll, resulting in increased roll cleaning frequency. Another problem is that the glue residue can detract from the aesthetic appeal of the product. On the other hand, reducing the amount of glue to avoid strike-through can result in insufficient adhesion between the plies, making the sheet more susceptible to peeling.

[0006] Now, PVA (polyvinyl alcohol, also known as PVOH) and CMC (carboxymethyl cellulose) types are commonly used for glue. PVA-based glues have good adhesive properties, but they tend to harden into a film, which can accumulate as glue residue and easily adhere to products. On the other hand, using CMC-based glue reduces the accumulation of glue residue, but has the issue of weaker ply adhesion compared to PVA-based glue.

[0007] Therefore, the present disclosure aims to provide a kitchen towel roll that has good adhesion between plies even when made of CMC, reduces the number of times the roll needs to be cleaned, suppresses the adhesion of glue residue, and prevents a decrease in aesthetic appeal. [Means for solving the problem]

[0008] In order to solve the above problems, the first aspect of the present invention is a kitchen towel roll in which a kitchen towel sheet is formed by laminating multiple plies of sheets, at least one of which has an embossed pattern, and the plies are then adhered with glue, and the resulting sheet is wound around a core to form a roll, wherein the number of plies of the kitchen towel sheet is 2 to 4, and the basis weight per ply of the kitchen towel sheet is 16.0 g / m 2 More than 26.0g / m 2the kitchen towel sheet has a paper thickness of 2.0 mm / 10 plies or more and 4.0 mm / 10 plies or less, the glue contains carboxymethyl cellulose, the ply peel strength of the kitchen towel sheet is 6.0 cN / 76 mm or more and 35.0 cN / 76 mm or less, and the root mean square height of the surface roughness of the portion of the kitchen towel sheet that does not have the embossed pattern is 30 μm or more and 130 μm or less.

[0009] A second aspect of the present invention is the kitchen towel roll of the first aspect, wherein the kitchen towel sheet has a tensile strength DMDT in the MD direction in a dry state according to JIS P 8113 of 1500 cN / 76 mm or more and 5000 cN / 76 mm or less.

[0010] A third aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the tensile strength (DCDT) of the kitchen towel sheet in the CD direction when dry, based on JIS P 8113, is 1500 cN / 76 mm or more and 5000 cN / 76 mm or less.

[0011] A fourth aspect of the present invention is the kitchen towel roll of the first or second aspect, wherein the water absorption per unit area of ​​the kitchen towel sheet is 350 g / m 2 More than 700g / m 2 The following is the result.

[0012] A fifth aspect of the present invention is the kitchen towel roll of the first aspect or the second aspect, wherein the specific volume of the kitchen towel sheet is 8 cm 3 / g or more 20cm 3 / g or less.

[0013] A sixth aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the core contains at least one of NBKP (softwood kraft pulp) and LBKP (hardwood kraft pulp), the weight content of the BKP in the core is 50% or more and 100% or less, and the weight content of the LBKP in the BKP is 50% or more and 100% or less.

[0014] A seventh aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the kitchen towel sheet contains wet pulp, and the weight content of the wet pulp is 50% or more and 100% or less.

[0015] An eighth aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the kitchen towel sheet contains at least one of NBKP (softwood kraft pulp) and LBKP (hardwood kraft pulp), and the weight ratio of NBKP to LBKP in the kitchen towel sheet (NBKP:LBKP) is 40% by weight or more and 100% by weight or less: 0% by weight or more and 60% by weight or less.

[0016] A ninth aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the embossing pattern includes radial embossings and closed-ring structure embossings, and the radial embossings and the closed-ring structure embossings are alternately arranged at equal intervals.

[0017] A tenth aspect of the present invention is a kitchen towel roll according to the ninth aspect, wherein the arrangement angle of adjacent identical patterns in the radial embossing or the closed ring structure embossing is 20° or more and 80° or less relative to the CD direction of the kitchen towel sheet. [Effects of the Invention]

[0018] According to the present disclosure, it is possible to provide a kitchen towel roll that has good adhesion between the plies, reduces the number of times the roll needs to be cleaned, and suppresses adhesion of glue residue, thereby preventing a decrease in aesthetic appeal. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view of a kitchen towel roll according to an embodiment of the present invention. [Figure 2] FIG. 10 is a diagram showing an example of an embossing pattern. [Figure 3] 1A and 1B are diagrams showing examples of radial embossing and closed-ring structure embossing of an embossing pattern. [Figure 4] FIG. 1 is an explanatory diagram of a method for measuring the water absorption of a kitchen towel sheet. [Figure 5] FIG. 10 is a diagram showing the height profile of a non-embossed portion on the XY plane as viewed under a microscope, using gray scales. [Figure 6] FIG. 1 is a diagram showing a part of the papermaking process for kitchen towel rolls. DETAILED DESCRIPTION OF THE INVENTION

[0020] An embodiment of the present invention will be described below with reference to the drawings. In the following description, the MD direction of a kitchen towel sheet refers to the machine direction in which the kitchen towel sheet is made, and the CD direction refers to the cross direction perpendicular to the MD direction. In the following description, a kitchen towel roll may be simply referred to as a "roll." The term "product ply" refers to a kitchen towel sheet in which the number of plies is in a finished product state, without peeling off the stacked plies into a single sheet.

[0021] <Kitchen towel roll> FIG. 1 is a perspective view of a kitchen towel roll according to one embodiment of the present invention.

[0022] As shown in Figure 1, the kitchen towel roll 1 according to this embodiment is a kitchen towel sheet 1x formed by laminating multiple plies of sheets, at least one of which has an embossed pattern, and then wrapping the plies around a core 1d to form a roll. It is preferable that the kitchen towel sheet 1x has perforations 1c formed across the width of the roll at approximately equal intervals in the winding direction of the roll.

[0023] As shown in Figure 1, the radially outer surface of the kitchen towel sheet 1x of the kitchen towel roll 1 is referred to as the front surface 1a (the front surface of the kitchen towel sheet 1x), and the radially inner surface is referred to as the back surface 1b (the back surface of the kitchen towel sheet 1x).

[0024] The kitchen towel roll 1 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 and remove dirt, as well as other rolls of sanitary paper.

[0025] (Volume length) The winding length of the kitchen towel roll 1 is preferably 10 m or more and 50 m or less. By setting the winding length of the kitchen towel roll 1 within this range, the winding diameter DR of the kitchen towel roll 1, described below, can be set within an appropriate range. If the winding length is longer than 50 m, the basis weight will be low and the amount of glue residue will increase to achieve a certain winding diameter. If the winding length is shorter than 10 m, the basis weight will be high and adhesion will be difficult. The lower limit of the above range of the winding length of the kitchen towel roll 1 is more preferably 15 m or more, and even more preferably 20 m or more. The upper limit of the above range of the winding length of the kitchen towel roll 1 is more preferably 45 m or less, and even more preferably 40 m or less.

[0026] The roll length of kitchen towel roll 1 is measured as follows. First, measure the length of 10 sheets of kitchen towel sheets 1x between perforations 1c on kitchen towel roll 1. Next, measure the number of sheets on kitchen towel roll 1, and calculate the roll length proportionally from the length of 10 sheets and the number of sheets. For example, if the length of 10 sheets is 1.80m and there are 150 sheets, the roll length is 1.80m x (150 / 10) = 27m. Note that if kitchen towel roll 1 does not have perforations 1c, measure the roll length.

[0027] (roll diameter) The roll diameter DR of the kitchen towel roll 1 is preferably 110 mm or more and 190 mm or less. If the roll diameter DR of the kitchen towel roll 1 is smaller than 110 mm, the basis weight is considered to be small. Therefore, when a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets increases relatively, which may lead to an increase in glue residue, increasing the number of times the roll needs to be cleaned, and reducing the aesthetic appeal of the product. On the other hand, if the roll diameter DR of the kitchen towel roll 1 is larger than 190 mm, the basis weight is considered to be large. Therefore, when a certain amount of glue is applied to adhere the sheets, the amount of glue is insufficient for adhesion, resulting in weak peel strength and making the sheets more likely to peel. The lower limit of the above range of the roll diameter DR of the kitchen towel roll 1 is more preferably 125 mm or more, and even more preferably 140 mm or more. The upper limit of the above range of the roll diameter DR of the kitchen towel roll 1 is more preferably 170 mm or less, and even more preferably 160 mm or less.

[0028] The roll diameter DR of the kitchen towel roll 1 is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. Three kitchen towel rolls 1 are measured, and the measurement results are averaged.

[0029] (roll width) The roll width W of the kitchen towel roll 1 is preferably 200 mm or more and 360 mm or less. If the roll width W of the kitchen towel roll 1 is smaller than 200 mm, the number of cuts made with the log saw during manufacturing increases, which may result in increased paper dust and reduced decorative appeal of the roll. On the other hand, if the roll width W of the kitchen towel roll 1 is larger than 360 mm, the amount of paper dust contained in each roll will increase relatively, which may result in reduced decorative appeal. The lower limit of the above range of the roll width W of the kitchen towel roll 1 is more preferably 230 mm or more, and even more preferably 260 mm or more. The upper limit of the above range of the roll width W of the kitchen towel roll 1 is more preferably 330 mm or less, and even more preferably 300 mm or less.

[0030] (roll weight) The roll weight of the kitchen towel roll 1 is preferably 260 g or more and 430 g or less. If the roll weight of the kitchen towel roll 1 is less than 260 g, the basis weight is likely to be low or the roll length is likely to be short. Therefore, if a certain amount of glue is applied to adhere the sheet, the roll may need to be cleaned more frequently, the aesthetic appeal of the product may be reduced, or the roll diameter DR may become inappropriate. On the other hand, if the roll weight of the kitchen towel roll 1 is greater than 430 g, the basis weight is likely to be high or the roll length is likely to be long, which may result in the sheet being more likely to peel off or the roll diameter DR may become inappropriate. The lower limit of the above range of the roll weight of the kitchen towel roll 1 is more preferably 290 g or more, and even more preferably 320 g or more. The upper limit of the above range of the roll weight of the kitchen towel roll 1 is more preferably 390 g or less, and even more preferably 360 g or less.

[0031] The roll weight is the weight per 280mm of roll width W, excluding the core 1d (sometimes called the paper tube or core) of the kitchen towel roll 1. If the roll width W is not 280mm, it is converted to the weight per 280mm by proportional calculation.

[0032] (roll cross-sectional area) The cross-sectional area of ​​the kitchen towel roll 1 is 110cm 2 More than 280cm 2 The roll cross-sectional area of ​​the kitchen towel roll 1 is preferably 110 cm or less. 2 If the roll cross-sectional area of ​​kitchen towel roll 1 is made smaller than 280 cm, the roll diameter DR will be small and the basis weight will be small. Therefore, if a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets will increase relatively, which may increase the amount of glue residue, increasing the number of times the roll is cleaned and reducing the aesthetic appeal of the product. On the other hand, if the roll cross-sectional area of ​​kitchen towel roll 1 is made smaller than 280 cm, the roll diameter DR will be small and the basis weight will be small. 2 If the cross-sectional area of ​​the kitchen towel roll 1 is larger than this, the basis weight is considered to be too large, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, the peel strength will be weak, and the sheets will easily peel off. 2 More preferably, it is 140cm or more. 2 The upper limit of the cross-sectional area of ​​the kitchen towel roll 1 is 240 cm 2 More preferably, it is 200 cm or less. 2 It is more preferable that:

[0033] The cross-sectional area of ​​the roll is the cross-sectional area of ​​the outer diameter (winding diameter DR) part of the kitchen towel roll 1 minus the cross-sectional area of ​​the outer diameter (core outer diameter DI) part of the core 1d, and is expressed as {(cross-sectional area of ​​the roll winding diameter DR part) - (cross-sectional area of ​​the core outer diameter DI part)}.

[0034] (roll volume) The roll volume of a kitchen towel roll is 3300 cm 3 More than 5500cm 3 The roll volume of the kitchen towel roll 1 is preferably 3,300 cm or less. 3If the roll volume of kitchen towel roll 1 is made smaller than 5500 cm, the roll diameter DR will be small and the basis weight will be small. Therefore, if a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets will increase relatively, which may increase the amount of glue residue, increasing the number of times the roll needs to be cleaned and reducing the aesthetic appeal of the product. On the other hand, if the roll volume of kitchen towel roll 1 is made smaller than 5500 cm, the roll diameter DR will be small and the basis weight will be small. 3 If the roll volume of the kitchen towel roll 1 is larger than this, the basis weight is considered to be too large, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, the peel strength will be weak, and the sheets will easily peel off. 3 More preferably, it is 4000 cm or more. 3 The upper limit of the roll volume of the kitchen towel roll 1 is 5000 cm or more. 3 More preferably, it is 4500 cm or less. 3 It is more preferable that:

[0035] The roll volume is the volume per roll width W of 280 mm. If the roll width W is not 280 mm, it is converted to the volume per 280 mm using a proportional calculation. The roll volume is expressed as the roll cross-sectional area x roll width W (converted to per 280 mm).

[0036] (roll density) The roll density of kitchen towel roll 1 is 0.03 g / cm 3 More than 0.10g / cm 3 The roll density of the kitchen towel roll 1 is preferably 0.03 g / cm or less. 3 If the roll density of kitchen towel roll 1 is smaller than 0.10 g / cm, the basis weight is considered to be small, and if a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets will increase relatively, which may increase the amount of glue residue, increasing the number of times the roll needs to be cleaned and reducing the aesthetic appeal of the product. 3If the roll density is larger than 0.04 g / cm, the basis weight is considered to be too large, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, the peel strength will be weak, and the sheets will easily peel off. The lower limit of the roll density range of kitchen towel roll 1 is 0.04 g / cm. 3 More preferably, it is 0.05 g / cm or more. 3 The upper limit of the roll density of the kitchen towel roll 1 is 0.09 g / cm. 3 More preferably, it is 0.08 g / cm or less. 3 It is more preferable that:

[0037] Roll density is expressed as (roll weight) ÷ (roll volume). As mentioned above, roll weight is the weight of the kitchen towel roll 1 per roll width W of 280 mm, excluding the core 1d. Also, as mentioned above, roll volume is the volume converted per roll width W of 280 mm. For example, if the roll weight (excluding the core 1d) is 316 g, the winding diameter DR is 157 mm, and the core outer diameter DI is 43 mm, roll density = 316 g ÷ [{3.14 × (157 mm ÷ 2 ÷ 10) 2 -3.14×(43mm÷2÷10) 2}×(280mm÷10)]=0.063g / cm 3 This becomes:

[0038] (winding density) The winding density of kitchen towel roll 1 is 0.20 m / cm 2 More than 0.50m / cm 2 The winding density of the kitchen towel roll 1 is preferably 0.20 m / cm or less. 2 If the winding density of kitchen towel roll 1 is made smaller than 0.50 m / cm, the basis weight is considered to be too large, and if a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, the peel strength will be weak, and the sheets will easily peel off. 2If the winding density is larger than this, the basis weight is considered to be small, and if a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets will increase relatively, which may increase the amount of glue residue, increasing the number of times the roll needs to be cleaned and reducing the aesthetic appeal of the product. The lower limit of the above range of the winding density of the kitchen towel roll 1 is 0.25 m / cm 2 More preferably, it is 0.30 m / cm or more. 2 The upper limit of the winding density of the kitchen towel roll 1 is 0.45 m / cm. 2 More preferably, it is 0.40 m / cm or less. 2 It is more preferable that:

[0039] The winding density is expressed as (winding length × number of plies) ÷ (cross-sectional area of ​​the roll). For example, in the case of a winding length of 35.0 m, 2 plies, a winding diameter of 157 mm, and a core outer diameter of 43 mm, the winding density is (35.0 m × 2) ÷ {3.14 × (157 mm ÷ 2 ÷ 10)} 2 -3.14×(43mm÷2÷10) 2}=0.39m / cm 2 This becomes:

[0040] (Core outer diameter) The core outer diameter DI, which is the outer diameter of the core (core 1d) of the kitchen towel roll 1, is preferably 36 mm or more and 55 mm or less. If the core outer diameter DI of the kitchen towel roll 1 is smaller than 36 mm, the roll volume will increase, which will relatively increase the amount of glue contained in the sheet and potentially increase glue residue, increasing the number of times the roll needs to be cleaned and reducing the aesthetic appeal of the product. On the other hand, if the core outer diameter DI of the kitchen towel roll 1 is larger than 55 mm, the roll volume will decrease, which will shorten the winding length and make it impossible to set the winding diameter DR within an appropriate range. The lower limit of the above range of the core outer diameter DI of the kitchen towel roll 1 is more preferably 39 mm or more, and even more preferably 43 mm or more. The upper limit of the above range of the core outer diameter DI of the kitchen towel roll 1 is more preferably 50 mm or less, and even more preferably 46 mm or less.

[0041] The core outer diameter DI is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. Three kitchen towel rolls 1 are measured and the measurement results are averaged.

[0042] (core) The core 1d is preferably a paper tube containing at least one BKP (Bleached Kraft Pulp) selected from NBKP (Softwood Kraft Pulp) and LBKP (Broadwood Kraft Pulp), and the weight content of BKP is preferably 50% or more and 100% or less. If the weight content of BKP in the core 1d is less than 50%, the decorative properties are reduced. The lower limit of the above range of the weight content of BKP in the core 1d is more preferably 70% or more, and even more preferably 90% or more.

[0043] Furthermore, the weight content of LBKP in the BKP contained in the paper tube that is the core 1d is preferably 50% or more and 100% or less. By setting the weight content of LBKP in the BKP contained in the paper tube that is the core 1d within the above range, the decorative properties are improved. Note that the lower limit of the above range of the weight content of LBKP in the BKP contained in the paper tube that is the core 1d is more preferably 70% or more, and even more preferably 90% or more.

[0044] <Kitchen towel sheet> The kitchen towel sheet 1x is made by laminating multiple plies of sheets, at least one of which has an embossed pattern (described later) attached thereto, and gluing the sheets together.

[0045] (Number of plies) The number of plies in the kitchen towel sheet 1x is between 2 and 4 plies inclusive. If the number of plies in the kitchen towel sheet 1x is less than 2 (1 ply), the embossed pattern described below becomes less visible, reducing the aesthetic appeal. On the other hand, if the number of plies in the kitchen towel sheet 1x is more than 4 plies, the amount of glue contained in one sheet increases, resulting in an increase in glue residue (a mixture of glue and paper powder), and increasing the number of times the roll needs to be cleaned to remove glue residue during the production of the kitchen towel roll 1. Furthermore, the increased glue residue may reduce the aesthetic appeal of the product. The above-mentioned range for the number of plies in the kitchen towel sheet 1x is preferably between 2 and 3 plies inclusive, and it is most preferable that the number of plies in the kitchen towel sheet 1x is 2 plies inclusive.

[0046] (NBKP and LBKP content ratio) The kitchen towel sheet 1x is preferably made of 100% by weight of wood pulp containing at least one of NBKP and LBKP, and the weight ratio of NBKP to LBKP (NBKP:LBKP) is preferably 40% by weight to 100% by weight:0% by weight to 60% by weight. Setting the weight ratio of NBKP to LBKP outside the above range results in an excessive amount of short fibers in the pulp, resulting in increased generation of glue residue and a decrease in aesthetic appeal. On the other hand, setting the weight ratio of NBKP to LBKP within the above range results in fewer short fibers in the pulp, suppressing generation of glue residue and improving aesthetic appeal. The weight ratio of NBKP to LBKP is more preferably 50% by weight to 90% by weight:10% by weight to 50% by weight, and even more preferably 60% by weight to 80% by weight:20% by weight to 40% by weight.

[0047] (Wet pulp weight content) The kitchen towel sheet 1x also contains wet pulp, and the weight content of the wet pulp is preferably 50% or more and 100% or less. If the weight content of the wet pulp is less than 50%, the proportion of dry pulp, which is less flexible than wet pulp, increases, weakening the bonds between the pulp fibers and resulting in a sheet with too little strength, which can lead to breakage during paper feed and increased roll cleaning frequency. The lower limit of the weight content of the wet pulp is more preferably 70% or more, and even more preferably 90% or more.

[0048] (Basic weight) The basis weight of one ply of kitchen towel sheet is 16.0 g / m 2 More than 26.0g / m 2 The basis weight per ply is 16.0 g / m 2 If the basis weight per ply is smaller than 26.0 g / m, when a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets will increase, resulting in more glue residue, which will increase the number of times the roll needs to be cleaned, and the cosmetic quality of the product will also decrease. 2 If the thickness is larger than 17.5 g / m², when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient, the peel strength will be weak, and the sheets will be easily peeled off. The lower limit of the above range of basis weight per ply of kitchen towel sheet 1x is 17.5 g / m². 2 It is preferable that the content is 18.0 g / m or more. 2 The upper limit of the above range of the basis weight per ply of the kitchen towel sheet 1x is 24.5 g / m 2 Preferably, it is 23.5 g / m or less. 2 It is more preferable that the basis weight of the kitchen towel sheet 1x is less than 1000 g / cm.sup.2. The basis weight of the kitchen towel sheet 1x can be measured in accordance with JIS P 8124.

[0049] (paper thickness) The paper thickness (thickness per 10 plies) of the kitchen towel sheet 1x is between 2.0 mm / 10 plies and 4.0 mm / 10 plies. If the thickness of the kitchen towel sheet 1x is less than 2.0 mm / 10 plies, when a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets increases, resulting in increased glue residue, increased roll cleaning frequency, and reduced aesthetic appeal of the product. On the other hand, if the thickness of the kitchen towel sheet 1x is greater than 4.0 mm / 10 plies, when a certain amount of glue is applied to adhere the sheets, the glue does not penetrate easily, resulting in weak peel strength and easy peeling of the sheets. The lower limit of the above-mentioned paper thickness range of the kitchen towel sheet 1x is preferably 2.3 mm / 10 plies or more, and more preferably 2.6 mm / 10 plies or more. The upper limit of the above-mentioned paper thickness range of the kitchen towel sheet 1x is preferably 3.5 mm / 10 plies or less, and more preferably 3.1 mm / 10 plies or less.

[0050] The thickness of the kitchen towel sheet 1x 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 37.85 gf / cm 2 The gauge diameter is 30 mm, and the sample is placed between the gauge and the measuring table. The gauge is read when the gauge is lowered at a speed of 1 mm per second or less. The sample is one kitchen towel sheet with 10 plies (measure the thickness of five sets of 2 plies, or 12 plies for 3-ply or 4-ply, and multiply the measured value by 10 / 12 to convert to 10 plies). The measurement is also repeated 10 times at different points, and the average of the measurement results is used as the final paper thickness.

[0051] (specific volume) The specific volume of one kitchen towel sheet is 8cm 3 / g or more 20cm 3 / g or less. The specific volume of 1x kitchen towel sheet is 8 cm 3If the specific volume of a kitchen towel sheet is made smaller than 20 cm / g, the glue residue will be more likely to adhere if the amount of glue applied is the same, which will increase the number of times the roll needs to be cleaned and also reduce the aesthetic appeal of the product. 3 If the specific volume of the kitchen towel sheet 1x is larger than 10 cm / g, the glue does not remain on the surface of the sheet, and the sheet becomes easy to peel off. 3 / g or more is more preferable, and 12cm 3 The upper limit of the above range of the specific volume of the kitchen towel sheet 1x is 18 cm 3 / g or less is more preferable, and 16cm 3 The specific volume of the kitchen towel sheet 1x is calculated by dividing the paper thickness per ply of the kitchen towel sheet 1x by the basis weight per ply, and then calculating the volume (cm 3 ) per unit (g). 3 )

[0052] (DMDT) The dry machine direction tensile strength (DMDT) of the kitchen towel sheet 1x (product ply) in the dry state according to JIS P 8113 is preferably 1500 cN / 76 mm or more and 5000 cN / 76 mm or less. If the tensile strength DMDT of the kitchen towel sheet 1x is less than 1500 cN / 76 mm, the strength may be too weak, leading to paper breakage during paper feed, and the need for frequent roll cleaning may increase. On the other hand, if the tensile strength DMDT of the kitchen towel sheet 1x is greater than 5000 cN / 76 mm, the basis weight is likely to be too high, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, resulting in weak peel strength and making the sheets more likely to peel. The lower limit of the above range of the tensile strength DMDT of the kitchen towel sheet 1x is more preferably 1650 cN / 76 mm or more, and even more preferably 1800 cN / 76 mm or more. Furthermore, the upper limit of the above range of the tensile strength DMDT of the kitchen towel sheet 1x is more preferably 4500 cN / 76 mm or less, and even more preferably 4000 cN / 76 mm or less.

[0053] (DCDT) The dry cross-direction tensile strength (DCDT) of the kitchen towel sheet 1x (product ply) in the dry state according to JIS P 8113 is preferably 1500 cN / 76 mm or more and 5000 cN / 76 mm or less. If the tensile strength DCDT of the kitchen towel sheet 1x is less than 1500 cN / 76 mm, the strength may be too weak, leading to paper breakage during paper feed, and the need for frequent roll cleaning may increase. On the other hand, if the tensile strength DCDT of the kitchen towel sheet 1x is greater than 5000 cN / 76 mm, the basis weight is likely to be too high, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, resulting in weak peel strength and making the sheets more susceptible to peeling. The lower limit of the above range of the tensile strength DCDT of the kitchen towel sheet 1x is more preferably 1650 cN / 76 mm or more, and even more preferably 1800 cN / 76 mm or more. Furthermore, the upper limit of the above range of the tensile strength DCDT of the kitchen towel sheet 1x is more preferably 4500 cN / 76 mm or less, and even more preferably 4000 cN / 76 mm or less.

[0054] The tensile strength DMDT and tensile strength DCDT of the kitchen towel sheet 1x are measured in accordance with JIS P 8113.

[0055] (GMT) The geometric tensile strength (GMT), which is the square root of the product of the tensile strength DMDT and the tensile strength DCDT of the kitchen towel sheet 1x (product ply), is preferably 1500 cN / 76 mm or more and 5000 cN / 76 mm or less. If the GMT of the kitchen towel sheet 1x is less than 1500 cN / 76 mm, the strength may be too weak, leading to paper breakage during paper feed, and the need for frequent roll cleaning may increase. On the other hand, if the GMT of the kitchen towel sheet 1x is greater than 5000 cN / 76 mm, the basis weight is likely to be too high, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, resulting in weak peel strength and making the sheets more likely to peel. The lower limit of the GMT range of the kitchen towel sheet 1x is more preferably 1650 cN / 76 mm or more, and even more preferably 1800 cN / 76 mm or more. Furthermore, the upper limit of the above range of GMT of the kitchen towel sheet 1x is more preferably 4500 cN / 76 mm or less, and even more preferably 4000 cN / 76 mm or less.

[0056] The GMT of one kitchen towel sheet is calculated from the tensile strength DMDT and tensile strength DCDT measured in accordance with JIS P 8113.

[0057] (Embossed) Fig. 2 is a diagram showing an example of an embossing pattern, and Fig. 3 is a diagram showing an example of a radial embossing and a closed-ring structure embossing of the embossing pattern.

[0058] As shown in Figures 2 and 3, the kitchen towel sheet 1x is embossed and has an embossed pattern 10 in which two or more patterns are arranged at regular intervals. The presence of the embossed pattern 10 dramatically improves the aesthetic appeal of the kitchen towel sheet 1x and the kitchen towel roll 1. The embossed pattern 10 is provided on at least one ply (the ply on the surface 1a side of the kitchen towel sheet 1x). By providing the embossed pattern 10 on the kitchen towel sheet 1x, the amount of glue applied becomes appropriate, peeling becomes less likely, and aesthetic appeal is improved. On the other hand, if the kitchen towel sheet 1x does not have the embossed pattern 10, aesthetic appeal is reduced and it becomes difficult to adhere the plies.

[0059] As shown in Figures 2 and 3, the embossed pattern 10 preferably includes radial embossments 11 and closed-ring structure embossments 12, with the radial embossments 11 and closed-ring structure embossments 12 alternately arranged at equal intervals. The inclusion of the radial embossments 11 dramatically improves the water diffusibility of the kitchen towel sheet 1x, while the inclusion of the closed-ring structure embossments 12 dramatically improves the water retention of the kitchen towel sheet 1x. Furthermore, the alternating arrangement of the radial embossments 11 and the closed-ring structure embossments 12 at equal intervals improves aesthetic appeal, optimizes the amount of glue applied, and optimizes peel strength. On the other hand, an embossed pattern that does not include at least one of the radial embossments 11 and the closed-ring structure embossments 12 reduces aesthetic appeal, impairs the amount of glue applied, and facilitates peeling. It is desirable that the embossed pattern 10 is not parallel to either the MD or CD.

[0060] The lines forming the embossed pattern 10 may be solid, broken, dashed, or dotted, and may be of any thickness. Among these, solid lines are preferred because they provide good diffusion of absorbed moisture and good water retention.

[0061] (radial embossing) The overall shape of the radial embossments 11 is not particularly limited, but it is preferable that the embossments have a linear shape extending from the center outward (in the direction away from the center) or a plurality of linear embossments. When the embossing pattern 10 includes the radial embossments 11, water diffuses along the embossments, improving the water diffusibility of the kitchen towel sheet 1x.

[0062] (closed ring structure embossed) Like the radial embossments 11, the overall shape of the closed-ring structure embossments 12 is not particularly limited, but it is preferable that the closed-ring structure embossments include a linear or geometric embossment provided in the center and a geometric embossment that surrounds the central embossment to form a closed ring. When the embossed pattern 10 includes the closed-ring structure embossments 12, water is retained inside the embossments, improving the water retention of the kitchen towel sheet 1x.

[0063] (Embossed pattern arrangement angle) The arrangement angle of adjacent identical patterns in the embossed pattern 10 (hereinafter also referred to as the "embossed pattern arrangement angle") is preferably 20° or more and 80° or less relative to the CD direction of the kitchen towel sheet 1x. If the embossed pattern 10 arrangement angle is less than 20° or more than 80°, the kitchen towel sheet 1x is prone to wrinkling during processing, resulting in poor aesthetic appeal. The lower limit of the arrangement angle is more preferably 25° or more, and even more preferably 30° or more. The upper limit of the arrangement angle is more preferably 70° or less, and even more preferably 60° or less.

[0064] The arrangement angle of the embossed pattern 12 is measured by the following method. (1) Select one embossment to be used as the measurement standard, and determine the reference point X of this embossment. (2) Two embosses adjacent to the reference embossment on the left and right in the CD direction are identified, and measurement points Y and Z of these embosses are determined. (3) Draw an auxiliary line passing through the reference point X and the measurement points Y and Z, and measure the angle between the reference line and the auxiliary line. If the measured angle exceeds 90°, the angle obtained by subtracting θ from 180° is the alignment angle.

[0065] (Water absorption) The water absorption per unit area of ​​one kitchen towel sheet (2 plies) is 350g / m 2 More than 700g / m 2 The water absorption per unit area is preferably 350 g / m or less. 2 If the water absorption per unit area is less than 700g / m, the basis weight is considered to be small, so if a certain amount of glue is applied to adhere the sheets, the amount of glue contained in the sheets will increase, which may increase the amount of glue residue, increasing the number of times the roll needs to be cleaned and reducing the aesthetic appeal of the product. On the other hand, if the water absorption per unit area is 700g / m, 2 If the basis weight is larger than this, the basis weight is considered to be too large, and when a certain amount of glue is applied to adhere the sheets, the amount of glue will not be sufficient for adhesion, the peel strength will be weak, and the sheets will be easily peeled off. The lower limit of the above range of water absorption per unit area of ​​kitchen towel sheet 1x is 400 g / m 2 It is preferable that the weight is 450 g / m or more. 2 The upper limit of the above range of the water absorption per unit area of ​​the kitchen towel sheet 1x is 600 g / m 2 Preferably, it is 550 g / m or less. 2 More preferably, it is:

[0066] The water absorption per unit weight of the kitchen towel sheet 1x (2-ply) is preferably 6 g / g or more and 22 g / g or less. If the water absorption per unit weight is less than 6 g / g, the specific volume is likely to be small. Therefore, for the same amount of glue applied, glue residue is more likely to adhere, requiring more frequent roll cleaning, and the product's aesthetic appeal is reduced. On the other hand, if the water absorption per unit weight is greater than 22 g / g, the specific volume is likely to be large, making it difficult for the glue to remain on the surface of the sheet and making the sheet more likely to peel off. The lower limit of the above range of the water absorption per unit weight of the kitchen towel sheet 1x is more preferably 8 g / g or more, and even more preferably 10 g / g or more. The upper limit of the above range of the water absorption per unit weight of the kitchen towel sheet 1x is more preferably 20 g / g or less, and even more preferably 17 g / g or less.

[0067] (Method for measuring water absorption) Next, a method for measuring the water absorption of each kitchen towel sheet 1x will be described. Fig. 4 is an explanatory diagram of a method for measuring the water absorption of a kitchen towel sheet.

[0068] When measuring the water absorption of a kitchen towel sheet 1x, first, two plies of the kitchen towel sheet 1x are taken and cut using a square template with each side measuring 7.6 cm to prepare a rectangular test piece 20 (see Figure 4) with each side measuring 7.6 cm. Next, the weight of the test piece 20 before water absorption is measured using an electronic balance. Next, the test piece 20 is set in a holder 21 (see Figure 4). The holder 21 is a jig that fixes three points of the test piece 20 and is 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 20 set in the holder 21 is immersed in the distilled water for 2 minutes. After immersion for 2 minutes, the test piece 20 is removed from the distilled water together with the holder 21, and as shown in Figure 4, the holder 21 and the test piece 20 are hung from a rod placed in an empty water tank with the specified corner 20a facing up, and the lid of the water tank is closed and left for 5 minutes.

[0070] Thereafter, the holder 21 and the test piece 20 are taken out of the water tank, the holder 21 is removed from the test piece 20, and the weight of the test piece 20 is measured using an electronic balance. Then, 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. 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 20 to obtain the water absorption per unit area (water g / sheet m 2 ) / basis weight (sheet g / sheet m 2 ) = Water absorption per unit weight (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] (Glue composition) The glue used to bond the sheets of the kitchen towel sheet 1x together contains at least carboxymethyl cellulose (CMC). Carboxymethyl cellulose (CMC) is a water-soluble polymer obtained from cellulose and has excellent thickening, water absorption, and water retention properties, which can suppress strike-through and the generation of glue residue. Additionally, starch, polyvinyl alcohol (PVOH), etc. may be included, but it is preferable that they not be included. The lower limit of the viscosity of the glue at 20°C is preferably 10 mPa·s or more, more preferably 30 mPa·s or more, and even more preferably 50 mPa·s or more. The upper limit of the viscosity of the glue is preferably 100 mPa·s or less, more preferably 80 mPa·s or less, and even more preferably 70 mPa·s or less. The lower limit of the active ingredient concentration in the glue is preferably 2% or more, more preferably 3% or more, and even more preferably 4% or more. The upper limit of the active ingredient concentration is preferably 40% or less, more preferably 20% or less, and even more preferably 10% or less.

[0072] (ply peel strength) The ply peel strength (the strength required to peel sheets from each other) of the kitchen towel sheet 1x is 6.0 cN / 76 mm or more and 35.0 cN / 76 mm or less. If the ply peel strength is less than 6.0 cN / 76 mm, the peel strength is too weak and the sheets easily peel off. On the other hand, if the ply peel strength is greater than 35.0 cN / 76 mm, the amount of carboxymethyl cellulose (CMC) contained in the sheet increases, resulting in increased glue residue, increased roll cleaning frequency, and reduced cosmetic appearance of the product. The lower limit of the above range of the ply peel strength of the kitchen towel sheet 1x is preferably 8.0 cN / 76 mm or more, and more preferably 10.0 cN / 76 mm or more. The upper limit of the above range of the ply peel strength of the kitchen towel sheet 1x is preferably 30.0 cN / 76 mm or less, and more preferably 25.0 cN / 76 mm or less.

[0073] The ply peel strength was measured using a tensile tester (STB-1225S, manufactured by A&D Co., Ltd.) in accordance with the tensile test method of JIS P 8113, under the standard conditions specified in JIS P 8111. First, a test piece measuring 75 mm in the width direction and 130 mm in the machine direction was taken from the kitchen towel roll sample. Next, the ply was peeled 50 mm in the machine direction. One side of the peeled ply was clamped 15 mm in the machine direction between upper clamps (76 mm wide). The other ply was also clamped 15 mm in the machine direction between lower clamps (75 mm wide). The clamp spacing was 80 mm. Next, the sample was pulled (peeled) at a pulling speed of 100 mm / min, and strength data was collected at least at one point per mm (at least 50 points per 50 mm). The data from 5 mm to 55 mm after the start of measurement (measurement length 50 mm) is averaged and this is taken as the peel strength (cN / 76 mm). However, if the perforation is included in the distance from 5 mm to 55 mm after the start of measurement, the distance after the start of measurement can be set to a range that does not include the perforation, such as from 40 mm to 90 mm (measurement length 50 mm).

[0074] (Root mean square height of surface roughness) The surface roughness root mean square height Sq of the kitchen towel sheet 1x in the portion not provided with the embossed pattern 10 (hereinafter sometimes referred to as the "non-embossed portion") is 30 μm or more and 130 μm or less. If the surface roughness root mean square height Sq of the non-embossed portion is less than 30 μm, given the same amount of glue applied, glue residue is more likely to adhere, requiring more frequent roll cleaning and reducing the cosmetic appeal of the product. On the other hand, if the surface roughness root mean square height Sq of the non-embossed portion is greater than 130 μm, the glue does not remain on the surface of the sheet, making it more likely to peel off. The lower limit of the above range of the surface roughness root mean square height Sq of the non-embossed portion is preferably 40 μm or more, and more preferably 50 μm or more. The upper limit of the above range of the root mean square height Sq of the surface roughness in the non-embossed portion is preferably 115 μm or less, and more preferably 100 μm or less.

[0075] The root mean square height Sq of the surface roughness of the non-embossed portion is measured using a microscope. The microscope used can be a Keyence One-Shot 3D Measuring Macroscope VR-6100. The VR6000 can be used as an application for observing, measuring, and analyzing microscope images. The measurement conditions are a magnification of 38x and a field of view of 8mm x 6mm. The measurement magnification and field of view may be changed as appropriate.

[0076] FIG. 5 is a diagram showing the height profile of the non-embossed portion on the XY plane as viewed under a microscope, using gray scales.

[0077] Filters are set for the image obtained, shown in Figure 5. Specifically, by setting an S-filter (low-pass filter), components with a scale smaller than the cutoff wavelength are removed from the image, and by setting an L-filter (high-pass filter), components with a scale larger than the cutoff wavelength are removed. Here, the S-filter is set to 500 μm, and the L-filter is set to 8 mm. By selecting the S-filter and L-filter, the root-mean-square height Sq is automatically calculated.

[0078] For the non-embossed portion, remove three wraps of kitchen towel sheet 1x from kitchen towel roll 1, and use the fourth wrap of kitchen towel sheet 1x to measure the surface side of the 2-4 ply sheet. Also, if there are perforations, avoid these when measuring. Measurements are taken at two locations across the width of kitchen towel roll 1 (CD), and then rotate kitchen towel roll 1 three times by 90 degrees in the machine direction (MD) of kitchen towel sheet 1x, and measure the same way at each position (for a total of four measurement locations in the machine direction). The average of these eight locations (2 x 4) is ultimately used as the root mean square height (Sq).

[0079] <Kitchen towel roll manufacturing method> FIG. 6 is a diagram showing a part of the papermaking process for kitchen towel rolls.

[0080] The kitchen towel roll 1 can be manufactured, for example, through the following steps: papermaking and creping, embossing and adhesive treatment, and roll winding.

[0081] In the papermaking process, raw pulp is blended in a predetermined ratio and paper-made in a papermaking machine to obtain a one-ply raw sheet. In the papermaking process for the kitchen towel sheet 1x, drying is preferably performed using a through-air drying (TAD) papermaking technique. During this papermaking process, a concave-convex pattern 13 (see FIG. 2; hereinafter referred to as "convex-convex pattern 13") derived from the papermaking process (fabric), which differs from the embossed pattern 10 described above, is applied to the kitchen towel sheet 1x. The presence of this concave-convex pattern 13 further increases the water absorption capacity of the kitchen towel sheet 1x.

[0082] As shown in FIG. 6, for example, a papermaking machine 30 used in a papermaking process includes two fabrics 31 and 32, a forming roll 33, at least one (two in FIG. 6) through-air dryer 34, a Yankee dryer 35, and a headbox 36.

[0083] The first fabric 31 is, for example, a TAD fabric having an uneven surface, and is provided so as to loop around a forming roll 33 and a plurality of guide rolls 37a, and rotates in a predetermined direction. The forming roll 33 is disposed upstream in the flow direction of a paper web (wet paper) 38b. The second fabric 32 is, for example, a forming wire (papermaking net), and is provided so as to loop around a plurality of guide rolls 37b, and rotates in a predetermined direction. The second fabric 32 is disposed so as to face the first fabric 31 that runs along the forming roll 33.

[0084] The head box 36 injects (supplies) pulp slurry 38a between the first fabric 31 along the forming roll 33 and the opposing second fabric 32. The pulp slurry 38a from the head box 36 is sandwiched between the first fabric 31 and the second fabric 32 by the forming roll 33 to form a paper web (wet paper) 38b.

[0085] The first fabric 31 passes through a through-air dryer 34 downstream of the forming roll 33. The paper web 38b that has passed through the forming roll 33 is separated from the second fabric 32 before the through-air dryer 34 and passes through the through-air dryer 34 together with the first fabric 31. The through-air dryer 34 removes water from the paper web 38b to dry it. One or two through-air dryers 34 may be provided.

[0086] The Yankee dryer 35 is disposed downstream of the through-air dryer 34. The paper web 38b that has passed through the through-air dryer 34 is separated from the first fabric 31 and transported along the drum of the Yankee dryer 35. The Yankee dryer 35 performs final drying of the paper web 38b. Although a Yankee hood is shown on the Yankee dryer 35 in FIG. 6, the hood may be omitted. Creping may be performed in the Yankee dryer 35. When drying the paper web 38b, it is preferable that the rate of change in moisture content of the paper web 38b before and after the through-air dryer 34 is greater than the rate of change before and after the Yankee dryer 35.

[0087] "Derived from the papermaking process" means that the uneven pattern is imparted between the head box 36 of the papermaking machine 30 and the outlet of the Yankee dryer 35 during the papermaking process for the kitchen towel sheet 1x. In particular, the uneven pattern 13 is formed by drying the paper web 38b together with the first fabric 31 in the through-air dryer 34. Specifically, the uneven pattern 13 is imparted by the uneven first fabric 31 during part of the papermaking process shown in Figure 6. The uneven pattern 13 can be changed as needed by changing the pattern (fine pattern, coarse pattern) of the first fabric 31. Changing the uneven pattern 13 changes the specific volume (paper thickness), but it is preferable to select a pattern that ensures the specific volume in the rolled state falls within the above-mentioned numerical range.

[0088] In the embossing and gluing process, the sheets are embossed and then stacked to form multiple plies (e.g., two plies). When stacking multiple plies, a glue containing carboxymethyl cellulose (CMC) is applied to the sheets for gluing.

[0089] As described above, the kitchen towel roll 1 according to this embodiment is a kitchen towel roll 1 formed by wrapping a kitchen towel sheet 1x, which is made by laminating multiple plies of sheets, at least one of which has an embossed pattern 10, around a core 1d, and forming the kitchen towel sheet 1x into a roll. The number of plies in the kitchen towel sheet 1x is 2 to 4, and the basis weight per ply of the kitchen towel sheet 1x is 16.0 g / m 2 More than 26.0g / m 2 the paper thickness of kitchen towel sheet 1x is 2.0 mm / 10 plies or more and 4.0 mm / 10 plies or less, the glue contains carboxymethyl cellulose, the ply peel strength of kitchen towel sheet 1x is 6.0 cN / 76 mm or more and 35.0 cN / 76 mm or less, and the root mean square height of the surface roughness of the portion of kitchen towel sheet 1x not having embossed pattern 10 is 30 μm or more and 130 μm or less.

[0090] Therefore, according to this embodiment, it is possible to provide a kitchen towel roll 1 that has good adhesion between the plies, reduces the number of times the roll needs to be cleaned, and suppresses the adhesion of glue residue, thereby preventing a decrease in aesthetic appeal.

[0091] Although the present invention has been described above based on the above embodiment, the present invention is not limited to the content of the above embodiment, and can be modified as appropriate without departing from the scope of the present invention. In other words, all other embodiments, examples, operational techniques, etc. made by those skilled in the art based on this embodiment are naturally included in the scope of the present invention. [Example]

[0092] The present embodiment will be described in more detail below with reference to examples and comparative examples, but the present invention is not limited to the following examples.

[0093] (Examples 1 to 9 and Comparative Examples 1 to 4) Through the processes of papermaking and creping, embossing and adhesive treatment, and roll winding, kitchen towel rolls of Examples 1 to 9 and Comparative Examples 1 to 4 shown in Tables 1 and 2 were manufactured. Each kitchen towel roll was then measured or evaluated for the following three items ("difficulty in peeling," "number of times the roll can be cleaned," and "decorative properties"). Each parameter was measured according to the standards or measurement methods described above.

[0094] (Difficulty in peeling) The "difficulty to peel" was evaluated based on the peel strength of the ply of the kitchen towel sheet of each kitchen towel roll. The evaluation criteria were as follows: A: Ply peel strength is 10cN / 76mm or more B: Ply peel strength is 9cN / 76mm or more and less than 10cN / 76mm C: Ply peel strength is 8cN / 76mm or more and less than 9cN / 76mm D: Ply peel strength is less than 8cN / 76mm

[0095] (Number of roll cleanings) The evaluation of "number of times of cleaning the roll" is based on the frequency of cleaning the roll required during the manufacture of each kitchen towel roll. The evaluation criteria are as follows: A: There was almost no need to clean the rolls. B: Roll cleaning was rarely necessary. C: Roll cleaning was necessary occasionally, but not to the extent that it was a problem. D: Roll cleaning was required frequently.

[0096] (cosmetic) The "cosmetic" evaluation was a sensory evaluation by 20 monitors of the cosmetic properties of each kitchen towel roll. For the "cosmetic" evaluation, 20 monitors were asked to use each kitchen towel roll and select either "good" or "bad" for the cosmetic properties. The evaluation was then conducted according to the following criteria: A: More than 19 people answered "Good" B: "Good": 17 to 18 people C: "Good": 12 to 16 people D: "Good" - 11 or fewer people

[0097] The results obtained are shown in Tables 1 and 2.

[0098] [Table 1]

[0099] [Table 2]

[0100] As shown in Tables 1 and 2, the kitchen towel rolls (kitchen towel sheets) of Examples 1 to 9 were all rated "C" or higher for "difficulty to peel," "number of times the roll can be cleaned," and "decorative appearance." On the other hand, the kitchen towel rolls (kitchen towel sheets) of Comparative Examples 1 to 4 were rated "D" for any of "difficulty to peel," "number of times the roll can be cleaned," and "decorative appearance."

[0101] Thus, it has been confirmed that the present disclosure can provide a kitchen towel roll that has good adhesion between plies, reduces the number of times the roll needs to be cleaned, and suppresses the adhesion of glue residue, thereby preventing a decrease in aesthetic appeal. [Explanation of symbols]

[0102] 1: Kitchen towel roll 1x: Kitchen towel sheet 10: Embossed pattern 11: Radial embossing 12: Closed ring structure embossing

Claims

1. A kitchen towel roll is formed by wrapping a kitchen towel sheet, which is made by laminating multiple plies of sheets, at least one of which has an embossed pattern, around a core, and forming the kitchen towel sheet into a roll. The number of plies of the kitchen towel sheet is 2 plies or more and 4 plies or less, The basis weight per ply of the kitchen towel sheet is 16.0 g / m ２ 26.0g / m or more ２ is as follows: The paper thickness of the kitchen towel sheet is 2.0 mm / 10 ply or more and 4.0 mm / 10 ply or less, The glue comprises carboxymethyl cellulose, The ply peel strength of the kitchen towel sheet is 6.0 cN / 76 mm or more and 35.0 cN / 76 mm or less, The root mean square height of the surface roughness of the portion of the kitchen towel sheet to which the embossed pattern is not applied is 30 μm or more and 130 μm or less. A kitchen towel roll.

2. The tensile strength DMDT of the kitchen towel sheet in the MD direction when dry according to JIS P 8113 is 1500 cN / 76 mm or more and 5000 cN / 76 mm or less.

2. The kitchen towel roll of claim 1.

3. The tensile strength (DCDT) of the kitchen towel sheet in the CD direction when dry according to JIS P 8113 is 1500 cN / 76 mm or more and 5000 cN / 76 mm or less.

3. The kitchen towel roll according to claim 1 or claim 2.

4. The water absorption capacity per unit area of ​​the kitchen towel sheet is 350 g / m ２ 700g / m or more ２ is 3. The kitchen towel roll according to claim 1 or claim 2.

5. The specific volume of the kitchen towel sheet is 8 cm ３ / g or more 20cm ３ / g or less 3. The kitchen towel roll according to claim 1 or claim 2.

6. The core contains at least one BKP selected from NBKP (softwood kraft pulp) and LBKP (hardwood kraft pulp), The weight content of the BKP in the core is 50% or more and 100% or less, The weight content of the LBKP in the BKP is 50% or more and 100% or less.

3. The kitchen towel roll according to claim 1 or claim 2.

7. The kitchen towel sheet contains wet pulp, and the weight content of the wet pulp is 50% or more and 100% or less.

3. The kitchen towel roll according to claim 1 or claim 2.

8. The kitchen towel sheet contains at least one of NBKP (softwood kraft pulp) and LBKP (hardwood kraft pulp), The weight ratio of NBKP to LBKP in the kitchen towel sheet (NBKP:LBKP) is 40% by weight or more and 100% by weight or less: 0% by weight or more and 60% by weight or less.

3. The kitchen towel roll according to claim 1 or claim 2.

9. The embossing pattern includes radial embossings and closed-ring structure embossings, and the radial embossings and the closed-ring structure embossings are alternately arranged at equal intervals.

3. The kitchen towel roll according to claim 1 or claim 2.

10. In the radial embossing or the closed ring structure embossing, the arrangement angle of adjacent identical patterns with respect to the CD direction of the kitchen towel sheet is 20° or more and 80° or less.

10. The kitchen towel roll of claim 9.

Images