Kitchen towel roll and method for producing kitchen towel roll

Abstract

To provide a kitchen towel roll exhibiting resistance to tearing at the time of use and superior water absorbency, and a method for producing the kitchen towel roll.SOLUTION: The present disclosure relates to a kitchen towel roll 1 obtained by winding, into a roll shape, a kitchen towel sheet 1x formed by laminating two plies of sheets, at least a front-side ply of which is provided with an emboss pattern. In the kitchen towel sheet 1x, a ratio (DMDT / DCDT) of a tensile strength DMDT in an MD direction in a dry state to a tensile strength DCDT in a CD direction in a dry state based on JIS P 8113 is 0.8 or more and 3.0 or less. In the kitchen towel sheet 1x, an elongation ratio (lateral elongation) in the CD direction is 8% or more. In the kitchen towel sheet 1x, a water absorption amount per unit area is 290 g / m2 or more and 610 g / m2 or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to kitchen towel rolls and methods for making kitchen towel rolls. [Background technology]

[0002] In recent years, various kitchen towel sheets and kitchen towel rolls made by rolling up sheets have been developed and sold. Kitchen towel sheets are required to be soft and absorbent, and Patent Document 1, for example, discloses a water-absorbent towel paper web that is through air dried (TAD). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2024-16101 Summary of the Invention [Problem to be solved by the invention]

[0004] While kitchen towels manufactured using TAD technology are bulky and highly absorbent, their bulkiness tends to result in lower strength than regular kitchen towels. Regular kitchen towels also have a difference (strength ratio) between their strength in the machine direction (MD) and cross direction (CD), and when the product is in use, they tend to tear more easily in the CD direction, where they have less stretch and are weaker. This tendency is more pronounced with kitchen towels manufactured using TAD technology.

[0005] In ordinary kitchen towels, the strength ratio in the MD and CD directions can be made close to 1:1 by adjusting the J / W ratio (the ratio between the raw pulp extrusion speed and the fabric (wire) speed during papermaking). However, kitchen towels manufactured using TAD technology often use textured fabrics when forming the sheet, and while it is possible to increase elongation in the CD direction by orienting the fibers three-dimensionally during sheet formation, the presence of the textured fabric mentioned above makes it difficult to make the strength ratio close to 1:1 with the conventional J / W ratio.

[0006] Therefore, an object of the present disclosure is to provide a kitchen towel roll that is resistant to tearing during use and has excellent water absorbency, and a method for manufacturing the kitchen towel roll. [Means for solving the problem]

[0007] In order to solve the above problems, a first aspect of the present invention is a kitchen towel roll obtained by winding up a kitchen towel sheet comprising two plies of sheets each having an embossed pattern on at least the front ply, wherein the ratio of the tensile strength in the MD direction in a dry state (DMDT) to the tensile strength in the CD direction in a dry state (DCDT) according to JIS P 8113 of the kitchen towel sheet (DMDT / DCDT) is 0.8 or more and 3.0 or less, the elongation percentage in the CD direction (transverse elongation) of the kitchen towel sheet is 8% or more, and the water absorption per unit area of ​​the kitchen towel sheet is 290 g / m 2 More than 610g / m 2 The following is the result.

[0008] A second aspect of the present invention is the kitchen towel roll of the first aspect, wherein the kitchen towel sheet has an uneven pattern derived from the papermaking process, different from the embossed pattern.

[0009] A third aspect of the present invention is the kitchen towel roll of the first or second aspect, wherein the basis weight per product ply of the kitchen towel sheet is 30 g / m 2 More than 54g / m2 The following is the result.

[0010] A fourth aspect of the present invention is the kitchen towel roll of the first or second aspect, wherein the elongation percentage in the MD direction (longitudinal elongation) of the kitchen towel sheet is 10% or more and 22% or less.

[0011] 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 23cm 3 / g or less.

[0012] A sixth aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the GMT, which is the square root of the product of the tensile strength DCDT and the tensile strength DMDT of the kitchen towel sheet, is 480 cN / 25 mm or more and 1450 cN / 25 mm or less.

[0013] A seventh aspect of the present invention is the kitchen towel roll of the first aspect or the second aspect, wherein the embossing pattern includes radial embossing and closed-ring structure embossing.

[0014] An eighth aspect of the present invention is the kitchen towel roll of the seventh aspect, wherein the radial embossments and the closed-ring structure embossments are alternately arranged at equal intervals.

[0015] A ninth aspect of the present invention is a kitchen towel roll according to the seventh aspect, wherein the arrangement angle of adjacent identical patterns for each of the radial embossing and the closed ring structure embossing is 20° or more and 80° or less relative to the CD direction of the kitchen towel sheet.

[0016] A tenth aspect of the present invention is a kitchen towel roll according to the first or second aspect, wherein the kitchen towel sheet contains 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 90% by weight or less:10% by weight or more and 60% by weight or less.

[0017] An eleventh aspect of the present invention is a method for producing the kitchen towel roll of the first aspect or the second aspect, which includes a papermaking step in which drying is performed by through-air drying (TAD). [Effects of the Invention]

[0018] According to the present disclosure, it is possible to provide a kitchen towel roll that is resistant to tearing during use and has excellent water absorbency, and a method for manufacturing the kitchen towel roll. [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. 10 is a diagram showing a method for measuring the arrangement angle of an embossed pattern. [Figure 5] FIG. 1 is an explanatory diagram of a method for measuring the water absorption of a kitchen towel sheet. [Figure 6] FIG. 1 is a diagram showing a part of the papermaking process for kitchen towel rolls. [Figure 7] FIG. 2 is a perspective view of a kitchen towel roll package in which three rolls of the kitchen towel roll of FIG. 1 are arranged side by side and wrapped in film. 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 direction perpendicular to the MD direction (cross direction). In the following description, a kitchen towel roll may be simply referred to as a "roll." The term "product ply" refers to the number of plies in a kitchen towel sheet. For example, if two sheets are stacked and wound to produce a kitchen towel sheet, the product ply will be two plies.

[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 made by laminating two plies of sheets, one or both of which have an embossed pattern, and bonding them with glue or water, and then winding the resulting two plies into 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 18 m or more and 45 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. The lower limit of the above range of the winding length of the kitchen towel roll 1 is more preferably 20 m or more, and even more preferably 24 m or more. The upper limit of the above range of the winding length of the kitchen towel roll 1 is more preferably 40 m or less, and even more preferably 35 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 127 mm or more and 175 mm or less. If the roll diameter DR of the kitchen towel roll 1 is less than 127 mm, attempting to keep the roll length within the above range will result in a low basis weight of the kitchen towel sheet 1x and poor water absorbency. On the other hand, if the roll diameter DR exceeds 175 mm, the basis weight of the kitchen towel sheet 1x will result in a high texture. The lower limit of the above range of the roll diameter DR of the kitchen towel roll 1 is more preferably 135 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 165 mm or less, and even more preferably 157 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 150 mm or more and 380 mm or less. If the roll width W of the kitchen towel roll 1 is less than 150 mm, the kitchen towel sheet 1x will be small and will have poor water absorbency. On the other hand, if the roll width W exceeds 380 mm, the kitchen towel sheet 1x will be too large and will be less user-friendly as a product. The lower limit of the above range of the roll width W of the kitchen towel roll 1 is more preferably 200 mm or more, and even more preferably 250 mm or more. The upper limit of the above range of the roll width W of the kitchen towel roll 1 is more preferably 340 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 200 g or more and 550 g or less. If the roll weight of the kitchen towel roll 1 is less than 200 g, the basis weight of the kitchen towel sheet 1x will be low, resulting in poor water absorbency. On the other hand, if the roll mass exceeds 550 g, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. The lower limit of the above range of the roll weight of the kitchen towel roll 1 is more preferably 240 g or more, and even more preferably 260 g or more. The upper limit of the above range of the roll weight of the kitchen towel roll 1 is more preferably 490 g or less, and even more preferably 450 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 density) The roll density of kitchen towel roll 1 is 0.04 g / cm 3 More than 0.13g / cm 3 The roll density of the kitchen towel roll 1 is preferably 0.04 g / cm or less. 3 If the roll density is less than 0.13 g / cm, the thickness of the kitchen towel sheet 1x will be too thick and the texture will be poor. 3 If the density exceeds 100%, the paper thickness of the kitchen towel sheet 1x will be reduced, resulting in poor water absorption. The lower limit of the roll density range of the kitchen towel roll 1 is 0.05 g / cm. 3 More preferably, it is 0.06 g / cm or more. 3 The upper limit of the roll density of the kitchen towel roll 1 is 0.11 g / cm. 3 More preferably, it is 0.09 g / cm or less. 3 It is more preferable that:

[0033] Roll density is expressed as (roll weight) ÷ (roll volume). Roll weight is the weight of a kitchen towel roll 1 per 280 mm of roll width W, excluding the core 1d. Roll volume is expressed as [{cross-sectional area of ​​the roll's outer diameter (winding diameter DR)} - (cross-sectional area of ​​the core's outer diameter DI)] × roll width W (converted per 280 mm). For example, if the roll weight (excluding the core 1d) is 261 g, the winding diameter DR is 140 mm, and the core's outer diameter DI is 44 mm, roll density = 261 g ÷ [{3.14 × (140 mm ÷ 2 ÷ 10) 2 -3.14×(44mm÷2÷10) 2}×(280mm÷10)]=0.07g / cm 3 This becomes:

[0034] (winding density) The winding density of kitchen towel roll 1 is 0.20 m / cm 2 More than 0.56m / cm 2 It is preferable that the winding density of the kitchen towel roll 1 is 0.20 m / cm or less. 2If the winding density is less than 0.56 m / cm, the basis weight of the kitchen towel sheet 1x will be high and the texture will be poor. 2 If the winding density of the kitchen towel roll 1 exceeds 0.24 m / cm, the basis weight of the kitchen towel sheet 1x will be low and the water absorbency will be poor. 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 0.50 m / cm or more. 2 More preferably, it is 0.45 m / cm or less. 2 It is more preferable that:

[0035] The winding density is expressed as (winding length x number of plies) ÷ (cross-sectional area of ​​the roll). The cross-sectional area of ​​the roll is expressed as {cross-sectional area of ​​the roll outer diameter (winding diameter DR) - (cross-sectional area of ​​the core outer diameter DI)}. For example, in the case of a winding length of 24.3 m, 2 plies, winding diameter DR of 140 mm, and core outer diameter DI of 44 mm, the winding density = (24.3 m x 2) ÷ {3.14 x (140 mm ÷ 2 ÷ 10)} 2 -3.14×(44mm÷2÷10) 2}=0.35m / cm 2 This becomes:

[0036] (Core outer diameter) The core outer diameter DI, which is the outer diameter of the core of the kitchen towel roll 1, is preferably 28 mm or more and 58 mm or less. If the core outer diameter DI of the kitchen towel roll 1 is less than 28 mm, the resulting reel diameter DR will be small. Therefore, to maintain a certain reel diameter DR, the basis weight of the kitchen towel sheet 1x must be increased, resulting in a poor feel of the kitchen towel sheet 1x. On the other hand, if the core outer diameter DI exceeds 58 mm, the resulting reel diameter DR will be large. Therefore, to maintain a certain reel diameter DR, the basis weight of the kitchen towel sheet 1x must be reduced, resulting in poor water absorbency. The lower limit of the above range of the core outer diameter DI of the kitchen towel roll 1 is more preferably 33 mm or more, and even more preferably 40 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 53 mm or less, and even more preferably 46 mm or less.

[0037] 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. If the core 1d does not have a core (paper tube), the outer diameter of the hollow core portion is measured.

[0038] (core) The core 1d is preferably a paper tube containing BKP (Bleached Kraft Pulp), which is at least one of NBKP (Softwood Kraft Pulp) and LBKP (Broadwood Kraft Pulp), and the weight content of BKP is preferably 50% to 100%, more preferably 70% to 100%, and even more preferably 90% to 100%. By setting the weight content of BKP in the paper tube that is the core 1d within the above range, the yield during production is improved. Furthermore, of the BKP contained in the paper tube that is the core 1d, the weight content of LBKP is preferably 50% to 100%, more preferably 70% to 100%, and even more preferably 90% to 100%. By setting the weight content of LBKP contained in the BKP in the paper tube that is the core 1d within the above range, the yield during production is improved.

[0039] <Kitchen towel sheet> The kitchen towel sheet 1x is made by laminating two plies (product plies) of sheets each having an embossed pattern, which will be described later, on at least the front ply.

[0040] (NBKP and LBKP content ratio) The kitchen towel sheet 1x is preferably made of 100% by weight of wood pulp containing both NBKP and LBKP, and the weight ratio of NBKP to LBKP (NBKP:LBKP) is preferably 40% by weight to 90% by weight:10% by weight to 60% by weight. By setting the weight ratio of NBKP to LBKP within the above range, a kitchen towel roll 1 with excellent texture can be obtained. The weight ratio of NBKP to LBKP is more preferably 50% by weight to 85% by weight:15% by weight to 50% by weight, and even more preferably 60% by weight to 80% by weight:20% by weight to 40% by weight.

[0041] The kitchen towel sheet 1x may contain other pulps (e.g., recycled paper pulp, non-wood pulp, etc.) in addition to NBKP and LBKP. In this case, the weight content of the other pulps in the kitchen towel sheet 1x is preferably 20% or less, more preferably 10% or less, and even more preferably 5% or less.

[0042] When the kitchen towel sheet 1x is made of 100% by weight of wood pulp containing both NBKP and LBKP, it is preferable to beat the NBKP and not the LBKP. This allows the tensile strength (described later) to be within an appropriate range, resulting in a kitchen towel roll 1 that is tear-resistant during use and has an excellent texture.

[0043] The kitchen towel sheet 1x preferably contains wet pulp, with the wet pulp weight content being 50% or more. If the wet pulp weight content is less than 50%, the kitchen towel sheet 1x will have poor water absorbency. There is no particular upper limit for the wet pulp weight content, but if it is too high, the kitchen towel sheet 1x will tend to have high strength, which may result in poor texture. The lower limit for the wet pulp weight content is more preferably 70% or more, and even more preferably 90% or more.

[0044] (Basic weight) The basis weight of one ply of kitchen towel sheet is 15g / m 2 More than 27g / m 2 The basis weight per ply is preferably 15 g / m or less. 2 If the ply weight is less than 27 g / m, the strength and absorbency of the kitchen towel sheet 1x will tend to decrease. 2 If it is larger than this, the manufacturing cost will be high and the texture will be inferior. The lower limit of the above range of the basis weight per ply of the kitchen towel sheet 1x is 18 g / m 2 More preferably, it is 19 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 g / m 2 More preferably, it is 22.5 g / m or less. 2 It is more preferable that:

[0045] The basis weight of one kitchen towel sheet (2 plies) is 30 g / m 2 More than 54g / m 2 The basis weight per product ply is preferably 30 g / m or less. 2 If the weight per ply of the product is less than 54 g / m, the strength and absorbency of the kitchen towel sheet 1x tend to decrease. 2If it is larger than this, the manufacturing cost will be high and the texture will be inferior. The lower limit of the above range of the basis weight per product ply of the kitchen towel sheet 1x is 36 g / m 2 More preferably, it is 38 g / m or more. 2 The upper limit of the above range of the basis weight per product ply of the kitchen towel sheet 1x is 48 g / m 2 More preferably, it is 45 g / m or less. 2 It is more preferable that:

[0046] The basis weight of the kitchen towel sheet 1x can be measured based on JIS P 8124.

[0047] (paper thickness) The paper thickness of the product ply of the kitchen towel sheet 1x is preferably 0.35 mm or more per product ply and 0.80 mm or less per product ply. If the paper thickness of the kitchen towel sheet 1x is less than 0.35 mm per product ply, the water absorbency of the kitchen towel sheet 1x will be poor. On the other hand, if the paper thickness of the kitchen towel sheet 1x is greater than 0.80 mm per product ply, the basis weight will tend to be high, resulting in poor texture. The lower limit of the above range of the paper thickness of the kitchen towel sheet 1x is more preferably 0.40 mm or more per product ply, and even more preferably 0.45 mm or more per product ply. The upper limit of the above range of the paper thickness of the kitchen towel sheet 1x is more preferably 0.75 mm or less per product ply, and even more preferably 0.70 mm or less per product ply.

[0048] The thickness of a single kitchen towel sheet can be measured using a thickness gauge (a dial thickness gauge called "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa, a probe diameter of 30 mm, and a sample placed between the probe and the measuring table. The gauge is read when the probe is lowered at a speed of 1 mm per second or less. Measurements are taken of 10 plies of a single kitchen towel sheet (5 sets of 2 plies), and the measurements are proportionally calculated to obtain the value per product ply (2 plies). Measurements are also taken 10 times at different locations, and the average of the results is used to obtain the final paper thickness per product ply.

[0049] (seat length) The sheet length between adjacent perforations 1c of the kitchen towel sheet 1x (the length of the kitchen towel sheet 1x along the circumferential direction of the kitchen towel roll 1) is preferably 100 mm or more and 250 mm or less. If the sheet length of the kitchen towel sheet 1x is less than 100 mm, it will have poor water retention. On the other hand, if the sheet length of the kitchen towel sheet 1x is greater than 250 mm, the kitchen towel sheet 1x will be too long and will have poor water diffusion properties. The lower limit of the above-mentioned sheet length range of the kitchen towel sheet 1x is more preferably 130 mm or more, and even more preferably 150 mm or more. The upper limit of the above-mentioned sheet length range of the kitchen towel sheet 1x is more preferably 230 mm or less, and even more preferably 210 mm or less.

[0050] (specific volume) The specific volume of one kitchen towel sheet is 8cm 3 / g or more 23cm 3 / g or less. The specific volume of 1x kitchen towel sheet is 8 cm 3 If the specific volume of the kitchen towel sheet 1x is less than 23 cm / g, the absorbency of the kitchen towel sheet 1x will be poor. 3 If the specific volume of the kitchen towel sheet is greater than 9 cm / g, the texture will be inferior. 3 / g or more is more preferable, and 12cm3 The upper limit of the above range of the specific volume of the kitchen towel sheet 1x is 20 cm 3 / g or less is more preferable, and 17cm 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) per unit (g). 3 )

[0051] (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 600 cN / 25 mm or more and 1500 cN / 25 mm or less. If the tensile strength DMDT of the kitchen towel sheet 1x is less than 600 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be low, resulting in poor water absorbency. On the other hand, if the tensile strength DMDT of the kitchen towel sheet 1x is greater than 1500 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. Alternatively, the sheet will be too hard due to excessive beating, resulting in poor texture. The lower limit of the above range of the tensile strength DMDT of the kitchen towel sheet 1x is more preferably 700 cN / 25 mm or more, and even more preferably 800 cN / 25 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 1400 cN / 25 mm or less, and even more preferably 1300 cN / 25 mm or less.

[0052] (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 400 cN / 25 mm or more and 1400 cN / 25 mm or less. If the tensile strength DCDT of the kitchen towel sheet 1x is less than 400 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be low, potentially making it more susceptible to tearing during use. On the other hand, if the tensile strength DCDT of the kitchen towel sheet 1x is greater than 1400 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. Alternatively, the sheet will be too hard and beaten, resulting in poor texture. The lower limit of the above range of the tensile strength DCDT of the kitchen towel sheet 1x is more preferably 600 cN / 25 mm or more, and even more preferably 750 cN / 25 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 1300 cN / 25 mm or less, and even more preferably 1150 cN / 25 mm or less.

[0053] The tensile strength DMDT and tensile strength DCDT of the kitchen towel sheet 1x are measured in accordance with JIS P 8113.

[0054] (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 480 cN / 25 mm or more and 1450 cN / 25 mm or less. If the GMT of the kitchen towel sheet 1x is set lower than 480 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be low, potentially making it more susceptible to tearing during use. On the other hand, if the GMT of the kitchen towel sheet 1x is set higher than 1450 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. Alternatively, the sheet will be too hard due to excessive beating, resulting in poor texture. The lower limit of the above range of the GMT of the kitchen towel sheet 1x is more preferably 640 cN / 25 mm or more, and even more preferably 770 cN / 25 mm or more. Furthermore, the upper limit of the above range of GMT of the kitchen towel sheet 1x is more preferably 1350 cN / 25 mm or less, and even more preferably 1250 cN / 25 mm or less.

[0055] 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.

[0056] (DMDT / DCDT) The ratio (DMDT / DCDT) of the tensile strength in the MD direction (DMDT) of the kitchen towel sheet 1x (product ply) in the dry state to the tensile strength in the CD direction (DCDT) in the dry state according to JIS P 8113 is 0.8 or more and 3.0 or less. If the ratio of the tensile strength DMDT to the tensile strength DCDT is less than 0.8, the difference in strength between the MD and CD directions becomes too large, making the sheet more susceptible to tearing during use. On the other hand, if the ratio of the tensile strength DMDT to the tensile strength DCDT is greater than 3.0, the strength in the CD direction becomes too low, making the sheet more susceptible to tearing during use. The lower limit of the above range of the ratio of the tensile strength DMDT to the tensile strength DCDT is preferably 0.9 or more, more preferably 1.0 or more. The upper limit of the above range of the ratio of the tensile strength DMDT to the tensile strength DCDT is preferably 2.5 or less, more preferably 1.8 or less.

[0057] The ratio of the tensile strength DMDT to the tensile strength DCDT of the kitchen towel sheet 1x (product ply) is calculated as the ratio (DMDT / DCDT) from the tensile strength DMDT and tensile strength DCDT measured in accordance with JIS P 8113.

[0058] (WMDT) The wet machine direction tensile strength (WMDT) of the kitchen towel sheet 1x (product ply) in the wet state based on the old JIS S 3104 is preferably 160 cN / 25 mm or more and 460 cN / 25 mm or less. If the tensile strength WMDT of the kitchen towel sheet 1x is less than 160 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be low, potentially making it more susceptible to tearing during use. On the other hand, if the tensile strength WMDT of the kitchen towel sheet 1x is greater than 460 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. Alternatively, the sheet will be too hard due to excessive beating, resulting in poor texture. The lower limit of the above range of the tensile strength WMDT of the kitchen towel sheet 1x is more preferably 190 cN / 25 mm or more, and even more preferably 260 cN / 25 mm or more. Furthermore, the upper limit of the above range of the tensile strength WMDT of the kitchen towel sheet 1x is more preferably 410 cN / 25 mm or less, and even more preferably 340 cN / 25 mm or less.

[0059] (WCDT) The wet cross-direction tensile strength (WCDT) of the kitchen towel sheet 1x (product ply) in the CD direction, based on the old JIS S 3104, is preferably 120 cN / 25 mm or more and 400 cN / 25 mm or less. If the WCDT of the kitchen towel sheet 1x is less than 120 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be low, potentially making it more susceptible to tearing during use. On the other hand, if the WCDT of the kitchen towel sheet 1x is greater than 400 cN / 25 mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. Alternatively, the sheet will be too hard and beaten, resulting in poor texture. The lower limit of the above range of the WCDT of the kitchen towel sheet 1x is more preferably 160 cN / 25 mm or more, and even more preferably 220 cN / 25 mm or more. Furthermore, the upper limit of the above range of the tensile strength WCDT of the kitchen towel sheet 1x is more preferably 360 cN / 25 mm or less, and even more preferably 300 cN / 25 mm or less.

[0060] The tensile strength WMDT and tensile strength WCDT of a kitchen towel sheet 1x are measured in accordance with the old JIS S 3104.

[0061] (MD elongation) The MD elongation (longitudinal elongation) of the kitchen towel sheet 1x (product ply) when dry, based on JIS P 8113, is preferably 10% or more and 22% or less. If the MD elongation of the kitchen towel sheet 1x is less than 10%, the basis weight of the kitchen towel sheet 1x will be low, resulting in poor water absorption. On the other hand, if the MD elongation of the kitchen towel sheet 1x is greater than 22%, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor texture. The lower limit of the above range of the MD elongation of the kitchen towel sheet 1x is more preferably 12% or more, and even more preferably 13% or more. The upper limit of the above range of the MD elongation of the kitchen towel sheet 1x is more preferably 20% or less, and even more preferably 18% or less.

[0062] The MD elongation of the kitchen towel sheet 1x is expressed as the length stretched in the MD direction until the kitchen towel sheet 1x breaks during the tensile strength DMDT measurement, expressed as a percentage of the MD length of the sheet before the measurement.

[0063] (Extension in CD direction) The CD elongation (transverse elongation) of the kitchen towel sheet 1x (product ply) when dry is 8% or more according to JIS P 8113. If the CD elongation of the kitchen towel sheet 1x is less than 8%, the strength will be too low, and the kitchen towel sheet will be unable to absorb lateral loads during use, making it prone to tearing. There is no particular upper limit to the CD elongation (transverse elongation) of the kitchen towel sheet 1x (product ply) when dry, but if it is too high, the basis weight of the kitchen towel sheet 1x will increase, potentially resulting in poor texture. The lower limit of the CD elongation range of the kitchen towel sheet 1x is preferably 9% or more, and more preferably 10% or more.

[0064] The CD elongation of the kitchen towel sheet 1x is expressed as the length stretched in the CD direction until the kitchen towel sheet 1x breaks during the above-mentioned tensile strength DCDT measurement, expressed as a percentage of the CD length of the sheet before the measurement.

[0065] (Embossed) Fig. 2 is a diagram showing an example of an embossing pattern, Fig. 3 is a diagram showing an example of a radial embossing and a closed-ring structure embossing of an embossing pattern, and Fig. 4 is a diagram showing a method for measuring the arrangement angle of an embossing pattern.

[0066] 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 embossed pattern 10 dramatically improves the design of the kitchen towel sheet 1x and the kitchen towel roll 1. The embossed pattern 10 is provided at least to the ply on the front surface 1a of the kitchen towel sheet 1x. By providing the embossed pattern 10 on the front surface 1a, glue can be applied to the embossed portion and the two plies can be laminated together. The sheet on the back surface 1b may have (or have) an embossed pattern, but it is preferable that it not have (or do not have). The absence of an embossed pattern on the back surface 1b results in a kitchen towel sheet 1x (kitchen towel roll 1) with an excellent texture.

[0067] As shown in Figures 2 and 3, the embossed pattern 10 preferably includes radial embossments 11 and closed-ring structure embossments 12. Without the radial embossments 11, the kitchen towel sheet 1x will be less user-friendly as a product. Without the closed-ring structure embossments 12, the kitchen towel sheet 1x will have poor water absorbency.

[0068] It is also preferable that the radial embossments 11 and the closed-ring structure embossments 12 are alternately arranged at equal intervals. By alternately arranging them at equal intervals, the kitchen towel sheet 1x can be made to have excellent water absorbency and be easy to use as a product.

[0069] 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.

[0070] (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.

[0071] (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.

[0072] (embossing size) The size (area) of the embossed pattern 10, which includes one radial embossment 11 and one closed-ring structure embossment 12, is 16 cm 2 More than 250cm 2 The size of the embossed pattern 10 is preferably 16 cm or less. 2 If the size of the embossed pattern 10 is smaller than 250 cm, the embossed pattern 10 becomes too small and the water retention is poor. 2 If the size is larger than 28 cm, the embossed pattern 10 becomes too large and the water diffusion property becomes poor. 2 More preferably, it is 45cm or more. 2 The upper limit of the above range of the size of the embossed pattern 10 is 180 cm2 It is more preferable that it is less than 110cm 2 It is more preferable that:

[0073] The size of the embossed pattern 10 is determined by calculating the area of ​​a rectangle E that includes (circumscribes) all of the embossed pattern 10, as shown in Figure 3. The sizes of the long and short sides of this rectangle E can be changed as appropriate depending on the size of the embossed pattern 10 (radial embossments 11 and closed-ring structure embossments 12).

[0074] (Embossed pattern arrangement angle) Furthermore, for each of the radial embossments 11 and the closed-ring structure embossments 12, the arrangement angle of adjacent identical patterns (hereinafter also referred to as the "arrangement angle of the embossment pattern 10") is preferably 20° or more and 80° or less relative to the CD direction of the kitchen towel sheet 1x. If the arrangement angle of the embossment pattern 10 is less than 20° or more than 80°, the kitchen towel sheet 1x is likely to wrinkle during processing. 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.

[0075] (Method for measuring the arrangement angle of an embossed pattern) The arrangement angle of the embossed pattern 10 is measured by the following method.

[0076] First, one embossment is selected as the measurement standard, and the reference point of this embossment is determined. For example, as shown in Figure 4, the kitchen towel sheet 1x is placed so that the MD direction (Y direction) is vertical and the CD direction (X direction) is horizontal. Then, an arbitrary closed-ring structure embossment 12A (hereinafter referred to as "embossment 12A") in the center of the kitchen towel sheet 1x is selected, and its center point is designated as reference point 12a.

[0077] Next, two embossments adjacent to the reference embossment on the left and right sides in the CD direction are identified, and measurement points for these embossments are determined. For example, as shown in Figure 4, a line parallel to the CD direction is drawn through reference point 12a, and this is designated as reference line 12x. The left closed-ring structure embossment and the right closed-ring structure embossment, which are located above reference line 12x and closest to reference point 12a in the CD direction, are designated as 12B and 12C, respectively, and their center points are designated as measurement points 12b and 12c, respectively.

[0078] Next, an auxiliary line passing through the reference point and the measurement point is drawn, and the angle between the reference line and the auxiliary line is measured. For example, as shown in Figure 4, an auxiliary line 12y passing through reference point 12a and measurement point 12b, and an auxiliary line 12z passing through reference point 12a and measurement point c are drawn. Then, the angle θ1 between reference line 12x and auxiliary line 12y and the angle θ2 between reference line 12x and auxiliary line 12z are measured with a protractor, and these are defined as the arrangement angles. In Figure 4, θ1 is 35° and θ2 is 55°. Note that when θ exceeds 90°, the angle obtained by subtracting θ from 180° is defined as the arrangement angle. For example, when θ is 120°, the angle is defined as 60° (= 180° - 120°).

[0079] (Uneven pattern resulting from the papermaking process) The kitchen towel sheet 1x preferably has an embossed pattern 10 formed by embossing, as well as an uneven pattern 13 resulting from the papermaking process that is different from the embossed pattern 10 (hereinafter referred to as an "uneven pattern"). The uneven pattern 13 resulting from the papermaking process may be, for example, a dot-shaped pattern, as shown in FIG. 2. By providing the uneven pattern 13 resulting from the papermaking process in this way, the water absorption capacity of the kitchen towel sheet 1x is further increased. The individual shapes of the uneven pattern 13 resulting from the papermaking process are not particularly limited.

[0080] (Water absorption amount) The water absorption capacity per unit area of ​​one kitchen towel sheet is 290g / m 2 More than 610g / m 2 The water absorption per unit area is 290g / m 2On the other hand, if the water absorption per unit area is less than 610g / m 2 If it is larger than this, the water diffusion property will be poor. The lower limit of the above range of water absorption per unit area of ​​a kitchen towel sheet is 330 g / m 2 It is preferable that the weight is 380 g / m or more. 2 The upper limit of the above range of water absorption per unit area of ​​the kitchen towel sheet 1x is 550 g / m 2 Preferably, it is 500 g / m or less. 2 More preferably, it is:

[0081] The water absorption per unit weight of the kitchen towel sheet 1x is preferably 8.0 g / g or more. If the water absorption per unit weight is less than 8.0 g / g, the water diffusion properties will be poor. The lower limit of the above range of the water absorption per unit weight of the kitchen towel sheet 1x is more preferably 8.5 g / g or more, and even more preferably 9.0 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 14.0 g / g or less, and even more preferably 13.0 g / g or less.

[0082] (Method for measuring water absorption) Next, a method for measuring the water absorption of each kitchen towel sheet 1x will be described. Fig. 5 is an explanatory diagram of a method for measuring the water absorption of a kitchen towel sheet.

[0083] 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 5) 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 5). 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.

[0084] 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 5, 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.

[0085] 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.

[0086] <Kitchen towel roll manufacturing method> FIG. 6 is a diagram showing a part of the papermaking process for kitchen towel rolls.

[0087] The kitchen towel roll 1 can be manufactured, for example, through the following steps: papermaking and creping, embossing and adhesive treatment, and roll winding.

[0088] 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. In this case, it is preferable that a concave-convex pattern 13 derived from the papermaking process (fabric), different from the embossed pattern 10 described above, is applied to the kitchen towel sheet 1x in the papermaking process. The presence of this concave-convex pattern 13 further increases the water absorption capacity of the kitchen towel sheet 1x.

[0089] 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.

[0090] 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 the 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.

[0091] 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.

[0092] 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 semi-dry it.

[0093] 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.

[0094] "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.

[0095] (Paper making speed) The papermaking speed in the papermaking process is preferably 800 m / min or more and 1600 m / min or less. By setting the papermaking speed within this range, it becomes easier to adjust the DMDT / DCDT, water absorption, and CD elongation within the aforementioned ranges. The lower limit of the above papermaking speed range is more preferably 900 m / min or more, and even more preferably 1000 m / min or more. The upper limit of the above papermaking speed range is more preferably 1400 m / min or less, and even more preferably 1200 m / min or less.

[0096] (J / W ratio) The jet / wire ratio (J / W ratio), which is the ratio between the speed of the raw material ejected from the head box 36 and the speed of the two fabrics 31, 32 (wires), is preferably 1.02 or more and 1.12 or less. By setting the J / W ratio within this range, it becomes easier to adjust the DMDT / DCDT, water absorption, and CD elongation within the aforementioned ranges. The lower limit of the above range of the J / W ratio is more preferably 1.03 or more, and even more preferably 1.04 or more. The upper limit of the above range of the J / W ratio is more preferably 1.10 or less, and even more preferably 1.08 or less.

[0097] (Kitchen towel roll packaging) FIG. 7 is a perspective view of a kitchen towel roll package in which three rolls of the kitchen towel roll of FIG. 1 are arranged side by side and packaged in film.

[0098] As shown in Figure 7, multiple kitchen towel rolls 1 (three in this embodiment) can also be manufactured and sold in the form of a kitchen towel roll package 100, in which multiple kitchen towel rolls 1 are packaged together in packaging film 200. Multiple kitchen towel rolls 1 are packaged in film, arranged adjacent to each other in a row in a direction intersecting the axial direction so that their axial directions are approximately parallel to each other. The number of kitchen towel rolls 1 stored in kitchen towel roll package 100 is preferably two to three rolls, and more preferably three rolls. Furthermore, several packages (several packs) each containing three rolls can be collected and further packaged in an exterior film (bundle packaging).

[0099] As described above, the kitchen towel roll 1 according to this embodiment is a kitchen towel roll wound into a roll of kitchen towel sheet 1x, which is made by laminating two plies of sheets each having an embossed pattern 10 on at least the ply on the surface 1a side (front side), and the ratio (DMDT / DCDT) of the tensile strength in the MD direction in the dry state DMDT to the tensile strength in the CD direction in the dry state DCDT of kitchen towel sheet 1x according to JIS P 8113 is 0.8 or more and 3.0 or less, the elongation in the CD direction (transverse elongation) of kitchen towel sheet 1x is 8% or more, and the water absorption per unit area of ​​kitchen towel sheet 1x is 290 g / m 2 More than 610g / m 2 The following is the result.

[0100] Therefore, according to this embodiment, it is possible to provide a kitchen towel roll 1 that is difficult to tear during use and has excellent water absorbency, and a method for manufacturing the kitchen towel roll.

[0101] 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]

[0102] 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.

[0103] (Examples 1 to 7 and Comparative Examples 1 to 4) Through the processes of papermaking and creping, embossing and bonding, and roll winding, kitchen towel rolls of Examples 1 to 7 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 ("water absorbency," "resistance to tearing during use," and "handle"), and each parameter was measured according to the standards or measurement methods described above.

[0104] (Water absorption) The "water absorbency" evaluation was based on the amount of water absorbed per unit area of ​​the kitchen towel sheet of each kitchen towel roll. The evaluation criteria were as follows: ◎: Water absorption per unit area is 380g / m 2 End 〇: Water absorption per unit area is 330g / m 2 More than 380g / m 2 less than △: Water absorption per unit area is 290g / m 2 More than 330g / m 2 less than ×: Water absorption per unit area is 290 g / m 2 less than

[0105] (Resistance to tearing during use) The "tear resistance during use" evaluation was a sensory evaluation by 30 monitors of the tearing in the CD direction of the kitchen towel sheet of each kitchen towel roll during use. For the "tear resistance during use" evaluation, 30 monitors used the kitchen towel sheet of each kitchen towel roll and selected either "tear-resistant" or "tear-easy" regarding tearing during use. The evaluation was then conducted according to the following criteria: ◎: 29 or more people said it was "hard to break" 〇: "Hard to break": 27 to 28 people △: "Hard to break": 25 to 26 people ×: 24 or fewer people answered "hard to break"

[0106] (Texture) The "texture" evaluation was a sensory evaluation by 30 monitors of the texture of the kitchen towel sheet of each kitchen towel roll. The evaluation was based on the most commonly selected rating among the 30 monitors, with a "◎" rating for excellent texture, a "○" rating for moderate texture, and an "×" rating for poor texture.

[0107] The results obtained are shown in Tables 1 and 2.

[0108] [Table 1]

[0109] [Table 2]

[0110] As shown in Tables 1 and 2, the kitchen towel rolls (kitchen towel sheets) of Examples 1 to 7 were evaluated as good in terms of water absorbency, resistance to tearing during use, and texture. On the other hand, the kitchen towel rolls (kitchen towel sheets) of Comparative Examples 1 to 4 were evaluated as poor in terms of water absorbency, resistance to tearing during use, and texture.

[0111] Thus, it has been confirmed that the present disclosure can provide a kitchen towel roll that is resistant to tearing during use and has excellent water absorbency, as well as a method for manufacturing the kitchen towel roll. [Explanation of symbols]

[0112] 1: Kitchen towel roll 1x: Kitchen towel sheet 10: Embossed pattern 11: Radial embossing 12, 12A, 12B, 12C: Closed ring structure embossing 13: Uneven pattern (uneven pattern resulting from the papermaking process) 20: Test piece 21: Holder 30: Paper machine 100: Kitchen towel roll packaging 200: Packaging film

Claims

1. A kitchen towel roll is a kitchen towel sheet formed by laminating two plies of sheets having an embossed pattern on at least the front ply, the kitchen towel sheet being wound into a roll, The ratio (DMDT / DCDT) of the tensile strength in the MD direction in a dry state to the tensile strength in the CD direction in a dry state according to JIS P 8113 of the kitchen towel sheet is 0.8 or more and 3.0 or less, The kitchen towel sheet has an elongation rate in the CD direction (transverse elongation) of 8% or more, The water absorption capacity per unit area of ​​the kitchen towel sheet is 290 g / m ２ 610g / m or more ２ is A kitchen towel roll.

2. The kitchen towel sheet has a concave-convex pattern derived from the papermaking process, which is different from the embossed pattern.

2. The kitchen towel roll of claim 1.

3. The basis weight per product ply of the kitchen towel sheet is 30 g / m ２ 54g / m or more ２ is 3. The kitchen towel roll according to claim 1 or claim 2.

4. The elongation percentage in the MD direction (longitudinal elongation) of the kitchen towel sheet is 10% or more and 22% or less.

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 23cm ３ / g or less 3. The kitchen towel roll according to claim 1 or claim 2.

6. The kitchen towel sheet has a GMT, which is the square root of the product of the tensile strength DCDT and the tensile strength DMDT, of 480 cN / 25 mm or more and 1450 cN / 25 mm or less.

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

7. The embossing pattern includes a radial embossing and a closed ring structure embossing.

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

8. The radial embossments and the closed-ring structure embossments are alternately arranged at equal intervals.

8. The kitchen towel roll of claim 7.

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

8. The kitchen towel roll of claim 7.

10. The kitchen towel sheet contains 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 90% by weight or less: 10% by weight or more and 60% by weight or less.

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

11. A method for producing the kitchen towel roll according to claim 1 or 2, comprising: Includes a papermaking process that involves drying by through-air drying (TAD) A method for manufacturing a kitchen towel roll.

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