Kitchen towel roll

Abstract

To provide a kitchen towel roll whose productivity is preferable with no deposition of a foreign matter to an embossing roll in a production process even using a kitchen towel having an embossment pattern, in which ply peeling does not occur, and which has excellent water absorption property.SOLUTION: A kitchen towel roll is formed by winding a kitchen towel roll having an embossment pattern imparted to at least a front ply and stacked into 2 ply or more. In the kitchen towel roll, an area rate by a grid division method of the embossment pattern is equal to or greater than 40% and equal to or less than 86%. A water absorption amount per unit area of the kitchen towel is equal to or greater than 290 g / m2 and equal to or less than 600 g / m2.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a kitchen towel roll containing an embossed pattern. [Background technology]

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

[0003] TAD kitchen towels have a high bulk and excellent absorbency due to the unevenness inherent in the papermaking process. Furthermore, by using glue (or water) to bond the two plies together, strength and absorbency can be further improved. The glue (or water) is applied to the embossed convexities of the embossed sheet. In the case of TAD, the high absorbency and rapid absorption rate make the glue prone to seep through the sheet if too much glue is applied (too high an embossed area ratio). This phenomenon, known as strike-through, increases the frequency of cleaning the embossing roll and reduces productivity. Conversely, applying too little glue (too low an embossed area ratio) results in poor adhesion and increased ply separation. It also results in poor design. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2024-16101 Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made in view of the above circumstances, and aims to provide a kitchen towel roll that has an embossed pattern, but has good productivity without foreign matter accumulating on the embossing roll during the production process, does not cause ply peeling, and has excellent water absorbency and design. [Means for solving the problem]

[0006] The inventors conducted extensive research and discovered that the above-mentioned problems can be solved by specifying the area ratio of the embossed pattern and the amount of water absorption per unit area of ​​the kitchen towel in a kitchen towel roll formed by rolling up two or more plies of kitchen towels, with an embossed pattern imparted to at least the front ply, and thus completed the present invention.

[0007] (1) The first aspect of the present invention is a kitchen towel roll in which an embossed pattern is applied to at least the front ply, and two or more plies of kitchen towels are laminated and wound into a roll, and the area ratio of the embossed pattern is 40% or more and 86% or less by a grid division method, and the water absorption per unit area of ​​the kitchen towel is 290 g / m 2 More than 600g / m 2 A kitchen towel roll characterized by the following:

[0008] (2) A second aspect of the present invention is the kitchen towel roll described in (1), characterized in that the kitchen towel has an uneven pattern resulting from the papermaking process that is different from the embossed pattern.

[0009] (3) A third aspect of the present invention is a kitchen towel roll according to (1) or (2), characterized in that the peel strength between the glue- or water-bonded plies of the kitchen towel is 5 cN / 76 mm or more and 30 cN / 76 mm or less.

[0010] (4) A fourth aspect of the present invention is the kitchen towel roll according to (1) or (2), characterized in that the thickness of the kitchen towel is 0.35 mm or more and 0.80 mm or less.

[0011] (5) A fifth aspect of the present invention is the kitchen towel roll according to (1) or (2), wherein the basis weight of the kitchen towel is 30 g / m 2 More than 54g / m 2 It is characterized by the following:

[0012] (6) A sixth aspect of the present invention is the kitchen towel roll according to (1) or (2), characterized in that the water absorbency of the kitchen towel is 1.8 seconds / 1 ml or less.

[0013] (7) The seventh aspect of the present invention is the kitchen towel roll according to (1) or (2), characterized in that the embossing pattern has radial embossing and closed-ring structure embossing.

[0014] (8) The eighth aspect of the present invention is the kitchen towel roll described in (7), characterized in that the radial embossments and the closed ring structure embossments are alternately arranged at equal intervals.

[0015] (9) The ninth aspect of the present invention is the kitchen towel roll described in (8), characterized in that the arrangement angle of adjacent identical patterns of the radial embossing and the closed ring structure embossing is 20° or more and 80° or less with respect to the CD direction of the kitchen towel.

[0016] (10) The tenth aspect of the present invention is a kitchen towel roll according to (1) or (2), characterized in that the proportion of linear embossed portions contained in the embossed pattern is 20% or more.

[0017] (11) The eleventh aspect of the present invention is the kitchen towel roll according to (1) or (2), wherein the roll density is 0.04 g / cm 3 More than 0.13g / cm 3 It is characterized by the following:

[0018] (12) The twelfth aspect of the present invention is a kitchen towel roll according to (1) or (2), characterized in that the kitchen towel is dried by TAD (Through Air Drying) during the papermaking process. [Effects of the Invention]

[0019] According to the present invention, even in the case of kitchen towels having an embossed pattern, there is no accumulation of foreign matter on the embossing roll during the production process, which results in good productivity, no ply peeling, and kitchen towel rolls with excellent water absorbency and design. [Brief explanation of the drawings]

[0020] [Figure 1] 1 is a perspective view of a kitchen towel roll according to an embodiment of the present invention. [Figure 2] FIG. 1 is a diagram showing an example of an embossing pattern in a kitchen towel roll of the present invention. [Figure 3] FIG. 1 is a diagram showing an example of a radial embossing and a closed-ring structure embossing of an embossing pattern in a kitchen towel roll of the present invention. [Figure 4] FIG. 1 is a diagram showing a method for measuring the area ratio of an embossed pattern in a kitchen towel roll of the present invention using a grid division method. [Figure 5] FIG. 1 is a diagram showing a method for measuring the arrangement angle of the embossed pattern in the kitchen towel roll of the present invention. [Figure 6] FIG. 1 is a diagram showing a method for measuring the water absorption of the kitchen towel sheet of the present invention. [Figure 7] 1 is a diagram showing a part of the papermaking process for the kitchen towel sheet of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, a mode for carrying out the present invention (hereinafter simply referred to as "the present embodiment") will be described in detail. The following present embodiment is an example for explaining the present invention, and is not intended to limit the present invention to the following content. The present invention can be carried out by appropriately modifying it within the scope of its gist.

[0022] In this specification, "kitchen towel roll" (hereinafter simply referred to as "roll") refers to a roll product in which kitchen towels are wound into a roll. "Kitchen towel sheet" (hereinafter simply referred to as "sheet") refers to a sheet-like product in which kitchen towels are pulled out from a kitchen towel roll and cut along the perforations.

[0023] "MD direction" refers to the direction in which the paper runs on the machine, and "CD direction" refers to the direction perpendicular to the MD direction. In this specification, "MD direction of the roll" refers to the direction in which the kitchen towel is wound (Y direction in Figure 1), and "CD direction of the roll" refers to the direction perpendicular to the direction in which the kitchen towel is wound (X direction in Figure 1). "Axial direction" refers to the axial direction of the roll, which is the CD direction of the roll (X direction in Figure 1).

[0024] In this specification, the term "product ply" refers to a kitchen towel in which the number of plies is in a product state, without peeling off the stacked plies into a single sheet.

[0025] <Kitchen towel roll> Fig. 1 is a perspective view of a kitchen towel roll 1 according to one embodiment of the present invention. As shown in Fig. 1, the kitchen towel roll 1 according to this embodiment is a kitchen towel roll 1 wound into a roll from a kitchen towel 1x made by laminating two or more plies of sheets each having an embossed pattern 12 on at least the front ply. Preferably, the kitchen towel 1x has perforations 1c formed across the width of the roll at approximately equal intervals in the winding direction of the roll.

[0026] As shown in Figure 1, the surface of the kitchen towel 1x facing the outside of the roll is referred to as surface 1a (surface of the kitchen towel 1x), and the surface facing the center of the roll is referred to as back surface 1b (back surface of the kitchen towel 1x). Also, the edge of the kitchen towel 1x is referred to as the outermost edge 1e of the kitchen towel roll 1.

[0027] 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.

[0028] <Kitchen towel> The kitchen towel 1x can be made by layering base paper after a papermaking process, embossing if necessary, and then winding it into a roll to form the kitchen towel roll 1. Alternatively, the base paper may be embossed before being layered and wound into a roll.

[0029] (Paper making method) The kitchen towel 1x is preferably produced by a TAD (through-air drying) papermaking method. The TAD papermaking method is a method in which air drying is performed during the dehydration and drying step of the papermaking process (preferably without press-dehydrating the wet paper). By producing the kitchen towel 1x by the TAD papermaking method, the kitchen towel 1x can be provided with unevenness derived from the papermaking process, resulting in a bulky, soft kitchen towel 1x with excellent water absorbency.

[0030] (raw materials) The kitchen towel 1x may contain pulp fibers. The pulp fibers may include NBKP (softwood bleached kraft pulp fibers), LBKP (hardwood bleached kraft pulp fibers), and other pulps. NBKP is preferably beaten, and LBKP is preferably not beaten.

[0031] The mass ratio of NBKP and LBKP to other pulps ((NBKP+LBKP):other pulps) is preferably 80-100% by mass:20-0% by mass, more preferably 90-100% by mass:10-0% by mass, even more preferably 95-100% by mass:5-0% by mass, and most preferably 100% by mass:0% by mass. When the other pulps are 20% or less, the water absorbency and decorative properties of the kitchen towel 1x are good.

[0032] On the other hand, the mass ratio of NBKP to LBKP (NBKP:LBKP) is preferably 40-90% by mass:60-10% by mass. If the mass ratio of NBKP to LBKP is set outside the above range, the pulp will contain too many short fibers, resulting in a large amount of starch residue generated and a decrease in cosmetic appearance. On the other hand, by setting the mass ratio of NBKP to LBKP within the above range, the pulp will contain fewer short fibers, reducing the amount of starch residue generated and improving cosmetic appearance. The mass ratio of NBKP to LBKP is more preferably 50-85% by mass:50-15% by mass, and even more preferably 60-80% by mass:40-20% by mass.

[0033] (Wet pulp blend) The wet pulp fiber content in the kitchen towel 1x is preferably 50% or more, more preferably 70% or more, and even more preferably 90% or more. If the wet pulp fiber content is 50% or more, the kitchen towel 1x has good water absorbency.

[0034] (Uneven pattern resulting from the papermaking process) The surface of the kitchen towel 1x preferably has irregularities 11 resulting from the papermaking process, as shown in Figure 2. If the surface does not have irregularities 11 resulting from the papermaking process, the water absorbency of the kitchen towel 1x will be poor.

[0035] (Number of plies) The number of plies in the kitchen towel 1x is 2 or more, and preferably 2. If the number of plies is less than 2, the water absorbency of the roll 1 will be poor.

[0036] (paper thickness) The paper thickness of the product ply of the kitchen towel 1x is preferably 0.35 mm or more and 0.80 mm or less. If the paper thickness is less than 0.35 mm, the absorbency is poor, and if it exceeds 0.80 mm, the kitchen towel 1x absorbs too much glue, leading to ply peeling. Furthermore, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) is likely to accumulate on the embossing roll. The lower limit of the paper thickness is more preferably 0.40 mm or more, and even more preferably 0.45 mm or more. The upper limit is more preferably 0.75 mm or less, and even more preferably 0.70 mm or less.

[0037] The paper thickness was measured using the following method. The device used was a thickness gauge (a dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions were a measurement load of 3.7 kPa, a probe diameter of 30 mm, and a sample placed between the probe and the measurement table. The gauge was read when the probe was lowered at a speed of 1 mm per second or less. The paper thickness was measured at 10 points: five different points in the MD direction of the sheet 10 (the Y direction in Figure 2) and five points shifted from these five points in the CD direction (the X direction in Figure 2). Note that it is important to measure the paper thickness at 10 different points, but the exact positions are not important.

[0038] (Basic weight) The basis weight of the product ply for one kitchen towel is 30 g / m 2 More than 54g / m 2 The product ply has a basis weight of 30 g / m 2 If it is less than 54g / m, the absorbency will be poor. 2 If the weight exceeds this limit, the kitchen towel 1x will absorb too much glue, leading to ply peeling, and if too much glue is applied to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll. The lower limit of the product ply basis weight is 36 g / m 2 More preferably, 38 g / m 2 More preferably, the upper limit is 48 g / m 2 Less than 45 g / m is more preferable. 2 The following is more preferable: The basis weight is measured in accordance with JIS P 8124.

[0039] The minimum basis weight of one ply of kitchen towel is 15 g / m 2 More than 18g / m is preferable. 2 More preferably, 19 g / m 2 More preferably, the upper limit is 27 g / m 2 Less than 24 g / m is preferred 2 Less than 22.5 g / m is more preferable. 2 More preferably, the basis weight of one ply is 15 g / m 2 If it is less than 27g / m, the absorbency will be poor. 2 If the glue content exceeds this, the kitchen towel will absorb too much glue, leading to ply peeling, and if too much glue is applied to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.The basis weight of one ply is calculated by dividing the basis weight of the product ply by the number of plies.

[0040] (specific volume) The minimum specific volume of one kitchen towel is 7cm 3 / g or more is preferable, and 9cm 3 / g or more is more preferable, and 12cm 3 / g or more is more preferable. The upper limit is 23 cm 3 / g or less is preferable, and 20cm 3 / g or less is more preferable, and 17cm 3 / g or less is more preferable. 3 If it is less than 23cm / g, the water absorption is poor. 3 If the glue content exceeds 1 / g, the kitchen towel 1x will absorb too much glue, leading to ply peeling, and if too much glue is applied to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll. Note that the specific volume of the kitchen towel 1x is calculated by dividing the paper thickness of a given number of plies (for example, product plies) of the kitchen towel 1x by the basis weight of the given number of plies, and then calculating the volume cm per unit g. 3 It is expressed as:

[0041] (Embossed) The kitchen towel 1x is made by embossing at least the ply on the front surface 1a and then laminating it to form two or more plies. When laminating, it is preferable to use, for example, ply bond glue, and apply the glue to form an adhesive. When laminating three or more plies, (n-1) plies on the front surface 1a of the kitchen towel 1x are embossed together, and then the embossed ply is adhered to the ply on the back surface 1b. Note that n refers to the number of plies in the product. By adhering two or more plies in this way, the adhesion between the plies is strengthened, and the kitchen towel 1x is less likely to tear or peel off even when wet. Water may be used instead of the ply bond glue, or a mixture of glue and water may be used.

[0042] (embossed pattern) The embossing of the kitchen towel 1x preferably has an embossing pattern 12 in which two or more patterns are arranged at regular intervals. The embossing pattern 12 makes the laminated plies less likely to peel off. It is even more preferable that the embossing pattern 12 is provided on the ply on the surface 1a side of the kitchen towel 1x.

[0043] The lines forming the embossed pattern 12 may be solid, broken, dashed, or dotted, and may be of any thickness. Among these, solid lines are preferred as they are excellent in design and are less likely to cause ply peeling.

[0044] (embossed pattern) 2 and 3 are diagrams showing an example of the embossed pattern 12 of the kitchen towel 1x of this embodiment. The embossed pattern 12 preferably includes radial embossments 13 and closed-ring structure embossments 14. The radial embossments 13 and closed-ring structure embossments 14 provide excellent design.

[0045] (radial embossing) The overall shape of the radial embossments 13 is not particularly limited, but it is preferable that the embossed pattern 12 has a plurality of linear embossments extending from the center to the outside or a plurality of embossments in a shape made up of straight lines. When the embossed pattern 12 includes the radial embossments 13, water diffusion is improved and water absorption is improved.

[0046] (closed ring structure embossed) The closed-ring structure embossment 14 is not particularly limited in overall shape, as with the radial embossment 13, but preferably has a linear or geometric embossment provided in the center and a geometric embossment surrounding it to form a closed ring on the outside. When the embossed pattern 12 includes the closed-ring structure embossment 14, water retention is improved and water absorption is improved.

[0047] (Embossed pattern area) The lower limit of the size (area) of the embossed pattern 12 including one radial embossment 13 and one closed-ring structure embossment 14 (hereinafter also referred to as the "embossed pattern area") is 16 cm 2 More than 28cm is preferable. 2 More than 45cm is preferable. 2 More preferably, the upper limit is 250 cm 2 Less than 180cm is preferable 2 Less than 110cm is preferable. 2 More preferably, the embossed pattern area is 16 cm 2 Less than or 250cm 2 If it exceeds this value, the design of the seat will be poor.

[0048] The embossed pattern area is determined by calculating the area of ​​a rectangle E that includes (circumscribes) one embossed pattern 12 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 12 (radial embossments 13 and closed-ring structure embossments 14).

[0049] (area ratio by grid division method) The grid division area ratio of the embossing pattern 12 of the kitchen towel 1x (hereinafter simply referred to as the "grid division area ratio") is 40% or more and 86% or less. If the grid division area ratio is less than 40%, the amount of glue applied will be too small, weakening the ply adhesion and leading to ply peeling. This also results in poor design. If the grid division area ratio exceeds 86%, the amount of glue applied to bond the sheets will be too large, making it easier for foreign matter (glue residue) to accumulate on the embossing roll, resulting in increased cleaning frequency for the embossing roll and poor productivity. Note that if the grid division area ratio is 0%, glue will be applied to the entire sheet, causing problems when the upper limit is exceeded. The lower limit of the grid division area ratio is preferably 50% or more, more preferably 60% or more. The upper limit is preferably 83% or less, more preferably 80% or less.

[0050] The area ratio of the embossed pattern 12 by the grid division method is determined by the following procedure. (1) Select an arbitrary area of ​​100 mm length x 100 mm width from the surface 1a side (outer surface of the roll) of the kitchen towel 1x, which corresponds to the top 10% of the roll 1, as shown in Figure 4, and divide this area into squares of 5 mm length x 5 mm width. (2) Count the number of squares containing embossed pattern 12 among the 400 squares. (3) Then, calculate the grid division area ratio using the following formula. Grid division method area ratio (%) = total number of grids including embossing ÷ 400 × 100

[0051] (Area ratio measured by embossing method) The lower limit of the area ratio of the embossed pattern 12 of the kitchen towel 1x measured by the embossing method (hereinafter simply referred to as the "embossing area ratio") is preferably 4% or more, more preferably 6% or more, and even more preferably 8% or more. The upper limit of the embossing area ratio measured by the embossing method is preferably 30% or less, more preferably 25% or less, and even more preferably 15% or less. If the embossing area ratio measured by the embossing method is less than 4%, the paper thickness is likely to fluctuate, making it difficult to wrap the kitchen towel 1x around the core 1d. If the embossing area ratio measured by the embossing method is more than 30%, the kitchen towel 1x becomes stiff and difficult to wrap around the core 1d.

[0052] The area ratio of the embossing pattern 12 measured by the embossing measurement method is determined by measuring the surface 1a side (the outer surface of the roll) of the kitchen towel 1x, which corresponds to the top 10% of the roll 1, with a ruler or tape measure, measuring the area, and converting it into a ratio per unit area (area ratio). When the embossing is difficult to see with the naked eye or when the embossing width is narrow, it is preferable to measure the area using a microscope (KEYENCE VR-6000). The top 10% of the roll 1 refers to the outermost 10% of the roll 1 (the portion closest to the roll surface). For example, if the roll 1 is 30 m long, this refers to the first 3 m of use.

[0053] The embossing area ratio measured by the actual measurement method is determined by the following procedure. (1) Inside a rectangle E that includes one embossing pattern 12 as shown in Figure 3, for embossments that are 0.1 mm or more and 4 mm or less in thickness and 5 mm or more in length, measure the total length by adding up the embossment lengths, and calculate the area of ​​the embossment by multiplying the total length (mm) by the thickness (mm). (2) If the thickness of the embossments is not uniform in (1), calculate the area of ​​each embossment by multiplying the length (mm) of the embossment by the thickness (mm), and then add up the areas of all the embossments. (3) The ratio of the embossed area to the area of ​​rectangle E in Figure 3 (length (mm) x width (mm)) is (total embossed area / area of ​​rectangle E) x 100, which is the embossed area rate (%) measured by the actual measurement method. (4) If it is difficult to determine the embossing area ratio by actual measurement, the area ratio of the convex parts of the embossing roll used for embossing can be regarded as the area of ​​one sheet of kitchen towel 1x.

[0054] The size of one side of this rectangle E can be changed as appropriate depending on the size of the embossed pattern 12. Furthermore, if a rectangle that includes all of the embossed patterns 12 includes an embossed pattern adjacent to the embossed pattern 12 included in the rectangle, the length of that adjacent embossed pattern is also measured and included in the total length. If the size of one side of rectangle E cannot be clearly determined by the embossed pattern 12, the size of rectangle E is set to 10 cm x 10 cm, and the total length of the embossments included in this rectangle E is measured. The total length is determined using the method described above.

[0055] (Embossed pattern arrangement) It is also preferable that the radial embossments 13 and the closed-ring structure embossments 14 are alternately arranged at equal intervals, which improves water retention and diffusion, resulting in good water absorbency of the kitchen towel 1x.

[0056] (Embossed pattern arrangement angle) The arrangement angle of adjacent identical patterns in the embossed pattern 12 (hereinafter also referred to as the "embossed pattern arrangement angle") is preferably 20° or more, more preferably 25° or more, and even more preferably 30° or more, relative to the CD direction of the kitchen towel 1x. It is also preferably 80° or less, more preferably 70° or less, and even more preferably 60° or less. If the arrangement angle of the embossed pattern 12 is less than 20° or more than 80°, the kitchen towel 1x is prone to wrinkling during processing.

[0057] 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 of this embossment. For example, as shown in Figure 4, place the kitchen towel 1x so that the MD direction (Y direction) is vertical and the CD direction (X direction) is horizontal. Then, select any closed-ring structure embossment 14A (hereinafter referred to as "embossment 14A") in the center of the kitchen towel 1x, and set its center point as reference point 14a. (2) Two embossments adjacent to the reference embossment on the left and right in the CD direction are identified, and measurement points for these embossments are determined. As shown in Figure 4, a straight line passing through reference point 14a and parallel to the CD direction is drawn and designated as reference line 14x. The left closed-ring structure embossment and the right closed-ring structure embossment, which are located above reference line 14x and closest to reference point 14a in the CD direction, are designated as 14B and 14C, respectively, and their center points are designated as measurement points 14b and 14c. (3) Draw an auxiliary line passing through the reference point and the measurement point, and measure the angle between the reference line and the auxiliary line. As shown in Figure 4, an auxiliary line 14y passing through reference point 14a and measurement point 14b, and an auxiliary line 14z passing through reference point 14a and measurement point 14c are drawn. Then, the angle θ1 formed by reference line 14x and auxiliary line 14y, and the angle θ2 formed by reference line 14x and auxiliary line 14z are measured with a protractor and 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°).

[0058] (Linear embossing ratio) The proportion of linear embossed portions 12a in the embossed pattern 12 (hereinafter also referred to as "linear embossed proportion") is preferably 20% or more, more preferably 50% or more, and even more preferably 90% or more. If the linear embossed proportion is less than 20%, the ply will be more likely to peel off and the design will be inferior. In this case, "linear embossed portions 12a" refers to embossments in the embossed pattern 12 that have a thickness of 0.1 mm to 4 mm and a length of 5 mm or more.

[0059] The linear embossing ratio is determined as follows. (1) Divide any 100 mm x 100 mm area on the surface of kitchen towel 1x with embossed pattern 12 into 10 mm squares. (2) For each square, the number of squares containing the linear embossed portion 12a and the number of squares containing embossments other than the linear embossed portion 12a are counted. (3) The proportion of the linear embossed portion 12a is calculated using the following formula. Linear embossing ratio (%) = (number of squares including linear embossed portion 12a) ÷ (number of squares including linear embossed portion 12a + number of squares including embossments other than linear embossed portion 12a) × 100 (4) Note that "a square containing an embossment other than the linear embossed portion 12a" refers to a square that does not satisfy the conditions of the linear embossed portion 12a among the radial embossment 13 or the closed ring structure embossment 14. In addition, when one square contains both the linear embossment 12a and the dot embossment, the square with the larger occupancy is considered to be the square.

[0060] (Embossed on the back) There is no particular restriction on whether the ply on the back surface 1b of the kitchen towel 1x has an embossed pattern 12, as long as it has irregularities resulting from the papermaking process that are different from the embossed pattern 12. For example, it may have nested embossing or pin-to-pin embossing, or it may not be embossed at all. Nested embossing or no embossing is preferred, and no embossing is more preferred.

[0061] (seat length) The lower limit of the sheet length between adjacent perforations 1c of kitchen towel 1x (length in the Y direction shown in FIG. 1) is preferably 100 mm or more, more preferably 130 mm or more, and even more preferably 150 mm or more. The upper limit of the sheet length is preferably 250 mm or less, more preferably 230 mm or less, and even more preferably 210 mm or less. If the sheet length is less than 100 mm, the absorbency of kitchen towel 1x will be poor, and if it exceeds 250 mm, the absorbency of kitchen towel 1x will be higher than necessary.

[0062] (sheet width) The lower limit of the sheet width (hereinafter also referred to as "roll width") (W shown in FIG. 1) of the kitchen towel 1x is preferably 150 mm or more, more preferably 200 mm or more, and even more preferably 250 mm or more. The upper limit is preferably 380 mm or less, more preferably 340 mm or less, and even more preferably 300 mm or less. If the sheet width (W) is less than 150 mm, the absorbency of the kitchen towel 1x will be poor, and if it exceeds 380 mm, the absorbency of the kitchen towel 1x will be higher than necessary.

[0063] (DMDT) The lower limit of the dry machine direction tensile strength (DMDT) of the product ply of the kitchen towel 1x, as measured in accordance with JIS P 8113, is preferably 600 cN / 25 mm or more, more preferably 700 cN / 25 mm or more, and even more preferably 800 cN / 25 mm or more. The upper limit of DMDT is preferably 1500 cN / 25 mm or less, more preferably 1400 cN / 25 mm or less, and even more preferably 1300 cN / 25 mm or less. If the DMDT is less than 600 cN / 25 mm, the basis weight of the kitchen towel 1x will be low, resulting in poor water absorption. If the DMDT exceeds 1500 cN / 25 mm, the basis weight of the kitchen towel 1x will be high, resulting in excessive glue absorption by the kitchen towel 1x, leading to ply peeling. Furthermore, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0064] (DCDT) The lower limit of the dry cross-direction tensile strength (DCDT) of the product ply of the kitchen towel 1x, as measured in accordance with JIS P 8113, is preferably 400 cN / 25 mm or more, more preferably 600 cN / 25 mm or more, and even more preferably 750 cN / 25 mm or more. The upper limit of DCDT is preferably 1400 cN / 25 mm or less, more preferably 1300 cN / 25 mm or less, and even more preferably 1150 cN / 25 mm or less. If the DCDT is less than 400 cN / 25 mm, the basis weight of the kitchen towel 1x will be low, resulting in poor absorbency. If the DCDT exceeds 1400 cN / 25 mm, the basis weight of the kitchen towel 1x will be high, resulting in excessive glue absorption by the kitchen towel 1x, leading to ply delamination. Furthermore, if an excessive amount of glue is applied to prevent ply delamination, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0065] The DMDT and DCDT of one kitchen towel are measured in accordance with JIS P 8113 on the part of one kitchen towel that does not include perforation 1c.

[0066] (WMDT) The lower limit of the wet machine direction tensile strength (WMDT) of the product ply of the kitchen towel 1x, as measured in accordance with the former JIS S 3104, is preferably 210 cN / 25 mm or more, more preferably 230 cN / 25 mm or more, and even more preferably 250 cN / 25 mm or more. The upper limit of WMDT is preferably 430 cN / 25 mm or less, more preferably 380 cN / 25 mm or less, and even more preferably 340 cN / 25 mm or less. If the WMDT is less than 210 cN / 25 mm, the basis weight of the kitchen towel 1x will be low, resulting in poor absorbency. Furthermore, if the WMDT exceeds 430 cN / 25 mm, the basis weight of the kitchen towel 1x will be high, resulting in excessive glue absorption by the kitchen towel 1x, leading to ply peeling. Furthermore, if an increased amount of glue is applied to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0067] (WCDT) The lower limit of the wet cross-direction tensile strength (WCDT) of the product ply of kitchen towel 1x, as measured according to the former JIS S 3104, is preferably 160 cN / 25 mm or more, more preferably 190 cN / 25 mm or more, and even more preferably 220 cN / 25 mm or more. The upper limit of WCDT is preferably 370 cN / 25 mm or less, more preferably 330 cN / 25 mm or less, and even more preferably 300 cN / 25 mm or less. If the WCDT is less than 160 cN / 25 mm, the basis weight of the kitchen towel 1x will be low, resulting in poor water absorption. Furthermore, if the WCDT exceeds 370 cN / 25 mm, the basis weight of the kitchen towel 1x will be high, resulting in excessive glue absorption by the kitchen towel 1x, leading to ply peeling. Furthermore, if an excessive amount of glue is applied to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0068] The WMDT and WCDT of one kitchen towel are measured in accordance with the old JIS S 3104.

[0069] (MD elongation) The lower limit of the MD elongation of the product ply of the kitchen towel 1x when dry is preferably 10% or more, more preferably 12% or more, and even more preferably 13% or more. The upper limit of the elongation is preferably 22% or less, more preferably 20% or less, and even more preferably 18% or less. If the MD elongation is less than 10%, the basis weight of the kitchen towel 1x will be low and the water absorbency will be poor. If the elongation exceeds 22%, the basis weight of the kitchen towel 1x will be high, causing the kitchen towel 1x to absorb too much glue, leading to ply peeling. Furthermore, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0070] The elongation percentage in the MD direction is the length stretched until the kitchen towel 1x breaks during the above DMDT measurement, expressed as a percentage of the length of the sheet before the measurement.

[0071] (Water absorption <unit area>) The water absorption per unit area of ​​one kitchen towel (hereinafter simply referred to as "water absorption <unit area>") is 290 g / m 2 More than 600g / m 2 Water absorption <unit area> is 290g / m 2 If the water absorption capacity (unit area) is less than 600 g / m, the water absorption capacity will be poor. 2 If the water absorption exceeds this limit, the kitchen towel will absorb too much glue, leading to ply peeling. If too much glue is applied to prevent ply peeling, foreign matter (glue residue) will easily accumulate on the embossing roll. The lower limit of water absorption (unit area) is 330 g / m 2 More than 380g / m 2 More preferably, the upper limit is 520 g / m 2 Preferably less than 500 g / m 2 The following is more preferred:

[0072] (Water absorption <unit mass>) The lower limit of the water absorption per unit mass of the kitchen towel 1x (hereinafter simply referred to as "water absorption <unit mass>") is preferably 8.0 g / g or more, more preferably 8.5 g / g or more, and even more preferably 9.0 g / g or more. The upper limit is more preferably 14 g / g or less, and even more preferably 13 g / g or less. If the water absorption <unit mass> is less than 8.0 g / g, the water absorbency is poor. If the water absorption <unit mass> is more than 14 g / g, the kitchen towel 1x will absorb too much glue, leading to ply peeling. Furthermore, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) will easily accumulate on the embossing roll.

[0073] The water absorption of 1 kitchen towel in a dry state is measured according to the following method. (1) A kitchen towel 1x made up of two or more layers is taken and cut using a square template with one piece measuring 76 mm to prepare a rectangular test piece 20 (see FIG. 6) with one side measuring 76 mm. (2) After measuring the mass of the test piece 20 before water absorption with an electronic balance, the test piece 20 is set in a holder 21 (a jig that fixes three points of the test piece 20, the jig being made of a metal that does not absorb water). (3) 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. (4) 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 6, the holder 21 and the test piece 20 are hung on a rod placed in an empty water tank with the corner 20a facing up, the lid of the water tank is closed, and the test piece is left for 5 minutes. (5) Then, the holder 21 and the test piece 20 are taken out of the water tank, the holder 21 is removed, and the mass of the test piece 20 is measured using an electronic balance. (6) Water absorption amount <unit area> is calculated from the change in mass of the test piece 20 before and after immersion in distilled water, and is calculated as the amount of distilled water absorbed per unit area of ​​the test piece 20 (water g / sheet m 2 , 1m 2 Per. Abbreviated as g / m 2 ) is calculated. (7) Water absorption <unit mass> is the amount of water absorption per unit area (g of water / sheet m 2 ) by the basis weight of the product ply of the test piece 20. Specifically, the water absorption per unit area (water g / sheet m 2 ) ÷ Basis weight (sheet g / sheet m 2 ) = Water absorption amount <unit mass> (g of water / g of sheet, per 1g. Abbreviated as g / g). (8) Measurements are carried out five times for each sample, and the average value is used. (9) This measurement is carried out in accordance with JIS P 8111 at a temperature of 23±1°C and a humidity of 50±2%. The distilled water is kept at 23±1°C.

[0074] (Water absorption) The water absorbency per 1.0 ml of 1x kitchen towel is preferably 1.8 seconds / 1.0 ml or less, more preferably 1.5 seconds / 1.0 ml or less, and even more preferably 1.0 seconds / 1.0 ml. If the water absorbency exceeds 1.8 seconds / 1.0 ml, the water absorbency is poor.

[0075] The water absorbency per 1.0 ml of a 1x kitchen towel is measured in accordance with the old JIS S 3104 standard, where 0.1 ml is dropped every second and the time (seconds) it takes for the water droplet to be absorbed after 1.0 ml is dropped is measured. Note that if the water absorbency is less than 1.0 second, it is difficult to accurately measure the time (for example, to measure less than 1 second with a stopwatch, the button must be pressed quickly), so the time can be uniformly set to less than 1.0 second. Furthermore, the measurement of "the longest length of the portion of the kitchen towel where water has diffused 1 minute after measuring the water absorbency (1.0 ml)" is measured 1 minute after the water droplet (1.0 ml) is absorbed.

[0076] (peel strength between plies) The peel strength between plies bonded with glue or water (the strength required to peel the plies from each other) of a kitchen towel 1x (hereinafter simply referred to as "peel strength between plies") is preferably 5 cN / 76 mm or more and 30 cN / 76 mm or less. If the peel strength between plies is less than 5 cN / 76 mm, ply peeling is likely to occur. If it exceeds 30 cN / 76 mm, the amount of glue applied is too large, making it more likely that foreign matter (glue residue) will accumulate on the embossing roll. The lower limit of the peel strength between plies is more preferably 8 cN / 76 mm or more, and even more preferably 11 cN / 76 mm or more. The upper limit is more preferably 25 cN / 76 mm or less, and even more preferably 20 cN / 76 mm or less.

[0077] The peel strength between plies bonded with glue or water can be 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.

[0078] (1) First, a test piece measuring 76 mm in the CD direction and 130 mm in the MD direction is taken from the sample of roll 1. (2) Next, peel the ply 50 mm in the MD direction. One side of the peeled ply is clamped 15 mm in the MD direction by an upper grip (80 mm wide). The other ply is clamped 15 mm in the machine direction by a lower grip (80 mm wide). The distance between the grips is 70 mm. (3) Next, the specimen is pulled (peel) at a pulling speed of 100 mm / min, and strength data is collected at one or more points per mm (50 or more points per 50 mm). (4) The data from a distance of 5 mm to 55 mm after the start of measurement (measurement length 50 mm) is averaged and this is taken as the peel strength between the plies (cN / 76 mm). (5) However, if the perforation is included in the distance between 5 mm and 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 20 mm to 70 mm (measurement length 50 mm).

[0079] <Core (paper tube)> The paper tube (hereinafter also referred to as the "core") (1d in Figure 1) located at the center of the roll 1 and around which the kitchen towel 1x is wound into a roll may be a cylindrical paper tube or a cylindrical space.

[0080] (Core material) The core 1d preferably contains BKP (Bleached Kraft Pulp) as the pulp fiber contained in the base paper. The BKP content is preferably 50% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more. If the BKP content is 50% by mass or more, the core 1d is less likely to be crushed and is easier to attach to a paper holder.

[0081] The BKP contained in the core 1d preferably includes LBKP. The LBKP content is preferably 50% by mass or more, more preferably 70% by mass or more, and even more preferably 90% by mass or more, based on 100% by mass of BKP. If the LBKP content is 50% by mass or more, the cost of the core 1d can be reduced.

[0082] It is also preferable that the paper used for the core 1d is made of multiple overlapping sheets. If the core 1d is made of a single sheet of paper, the core 1d becomes thin and easily crushed. It is preferable that two sheets of paper are overlapped.

[0083] (Core outer diameter) The lower limit of the outer diameter (DI shown in FIG. 1) of the core 1d (hereinafter simply referred to as "core outer diameter") is preferably 28 mm or more, more preferably 33 mm or more, and even more preferably 40 mm or more. The upper limit of the core outer diameter is preferably 58 mm or less, more preferably 53 mm or less, and even more preferably 46 mm or less. If the core outer diameter is less than 28 mm or more than 58 mm, the kitchen towel 1x will not easily wrap around the core 1d.

[0084] The core outer diameter 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.

[0085] <Kitchen towel roll> The kitchen towel roll 1 obtained by winding the kitchen towel 1x around the core 1d in a roll shape preferably has the following characteristics.

[0086] (roll diameter) The lower limit of the winding diameter (DR shown in FIG. 1) of the roll 1 is preferably 127 mm or more, more preferably 135 mm or more, and even more preferably 140 mm or more. The upper limit of the winding diameter is preferably 175 mm or less, more preferably 165 mm or less, and even more preferably 157 mm or less. If the winding diameter is less than 127 mm, the roll density will be high and the water absorbency will be poor if the basis weight and winding length of the kitchen towel 1x are within a certain range. If the winding diameter exceeds 175 mm, the basis weight of the kitchen towel 1x will increase to maintain a certain winding length, causing the kitchen towel 1x to absorb too much glue, leading to ply peeling. Furthermore, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0087] The roll diameter is measured using a diameter rule manufactured by Muratec KDS Co., Ltd. Three rolls 1 are measured and the measurement results are averaged.

[0088] (Volume length) The lower limit of the winding length of the roll 1 is preferably 18 m or more, more preferably 20 m or more, and even more preferably 24 m or more. The upper limit is preferably 45 m or less, more preferably 40 m or less, and even more preferably 35 m or less. If the winding length is less than 18 m, and the roll density is kept within a certain range, the basis weight of the kitchen towel 1x will be high, causing the kitchen towel 1x to absorb too much glue, leading to ply peeling. Furthermore, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll. If the winding length exceeds 45 m, and the roll density is kept within a certain range, the basis weight of the kitchen towel 1x will be low, resulting in poor water absorbency.

[0089] The roll length is measured as follows. First, measure the length of 10 sheets of kitchen towel 1x between perforation 1c on roll 1 and the adjacent perforation 1c. Then, measure the number of sheets on 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. If kitchen towel roll 1 does not have perforations, measure the roll length.

[0090] (winding density) The lower limit of the winding density of roll 1 is 0.20 m / cm 2 More than 0.24m / cm is preferable. 2 More preferably, 0.30 m / cm or more 2 The upper limit of the winding density is 0.56 m / cm. 2 Preferably less than 0.50m / cm 2 Less than 0.45m / cm is more preferable. 2 More preferably, the winding density is 0.20 m / cm 2If the winding density of the kitchen towel 1x is less than 0.56 m / cm, the basis weight of the kitchen towel 1x will be high, and the kitchen towel 1x will absorb too much glue, leading to ply peeling. Also, if the amount of glue applied is increased to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll. 2 If it exceeds this value, the basis weight of the kitchen towel will be low and the absorbency will be poor.

[0091] 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 27 m, 2 plies, a winding diameter DR of 150 mm, and a core outer diameter DI of 39 mm, the winding density = (27 m x 2) ÷ {3.14 x (150 mm ÷ 2 ÷ 10) 2 -3.14×(39mm÷2÷10) 2}=0.33m / cm 2 This becomes:

[0092] (Roll mass <without core>) The lower limit of the roll mass of the roll 1 without the core 1d per 280 mm of roll width (hereinafter simply referred to as "roll mass <without core>") is preferably 200 g or more, more preferably 240 g or more, and even more preferably 260 g or more. The upper limit of the roll mass <without core> is preferably 550 g or less, more preferably 490 g or less, and even more preferably 450 g or less. If the roll mass <without core> is less than 200 g, the water absorbency of the kitchen towel 1x will be poor. If the roll mass <without core> is more than 550 g, the basis weight of the kitchen towel 1x will be high, causing the kitchen towel 1x to absorb too much glue, leading to ply peeling. Furthermore, if a large amount of glue is applied to prevent ply peeling, foreign matter (glue residue) will be more likely to accumulate on the embossing roll.

[0093] Roll mass (without core) is the mass per 280mm of roll width, excluding the core (paper tube) 1d of the kitchen towel roll 1. If the roll width is not 280mm, convert to the mass per 280mm by proportional calculation.

[0094] (roll density) The roll density of Roll 1 is 0.04 g / cm 3 More than 0.13g / cm 3 The roll density is preferably 0.04 g / cm or less. 3 If the roll density is less than 0.13 g / cm, the kitchen towel will absorb too much glue, leading to ply peeling. If the amount of glue applied is too large to prevent ply peeling, foreign matter (glue residue) will easily accumulate on the embossing roll. 3 If the roll density exceeds 0.05 g / cm, the absorbency of the kitchen towel will be poor. 3 More preferably, 0.06 g / cm or more 3 The upper limit is preferably 0.11 g / cm. 3 Less than 0.09 g / cm is more preferable. 3 The following is even more preferred:

[0095] Roll density is expressed as (roll mass) ÷ (roll volume). Roll mass is the mass of a kitchen towel roll 1 per 280 mm of roll width. 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 (converted per 280 mm). For example, if the roll mass (excluding the core) per 280 mm of roll width is 382 g, the winding diameter DR is 150 mm, and the core's outer diameter DI is 39 mm, then roll density = 382 g ÷ [{3.14 × (150 mm ÷ 2 ÷ 10) 2 -3.14×(39mm÷2÷10) 2}×(280mm÷10)]=0.08g / cm 3 This becomes:

[0096] <Kitchen towel packaging> A plurality of kitchen towel rolls 1 can be packaged in a resin film or the like to form a multi-package. From the viewpoint of portability, the number of rolls is preferably two or three, and more preferably three. For example, three rolls 1 can be packaged in a caramel-wrapped resin film so that both axial (X-direction) end faces of the roll 1 face the top and bottom of the package, respectively. Furthermore, after multi-packaging two or three rolls, multiple such multi-packages can be collected and further packaged in film.

[0097] <Kitchen towel roll manufacturing method> The kitchen towel roll 1 can be produced, for example, in the following order: (1) papermaking and creping, (2) embossing and bonding, and (3) roll winding. Note that the TAD papermaking method is preferably used in the production (papermaking) process of the kitchen towel 1x.

[0098] In the papermaking process (1), it is preferable that a concave-convex pattern derived from the papermaking process (fabric), different from the embossed pattern described above, is applied to the kitchen towel 1x. By having this concave-convex pattern, the water absorption capacity of the kitchen towel 1x can be further increased.

[0099] "Derived from the papermaking process" means that in the papermaking process of kitchen towel 1x, a pattern of protrusions and recesses is imparted between head box 41 of the papermaking machine and the outlet of Yankee dryer 46. Specifically, this is as follows. (1) In a part of the papermaking process shown in FIG. 7, pulp slurry 40a is sprayed (supplied) from a head box 41 to between a first fabric (forming fabric) 42 and a second fabric (convex and concave fabric) 43. (2) The wet paper 40 is pulled onto the second fabric (concave-convex fabric) 43 by the forming roll 44, and the wet paper 40b is formed. (3) Next, the wet paper 40b is dried together with the second fabric (concave-convex fabric) 43 in a through-air dryer 45, resulting in the formation of convexities and concavities on the dried sheet 40c. (4) In FIG. 7, the through-air dryer 45 is shown equipped with two units, but it may be equipped with only one unit. Also, although a Yankee hood is shown above the Yankee dryer 46, the hood may be omitted. Crepes may be applied by the Yankee dryer 46.

[0100] The uneven pattern resulting from the papermaking process can be modified by changing the fabric pattern (fine pattern, coarse pattern). Selecting a fine pattern reduces water absorption. On the other hand, selecting a coarse pattern leads to ply separation.

[0101] As described above, according to this embodiment, even if the kitchen towel has an uneven surface and is highly absorbent, it is possible to provide a kitchen towel roll that is compact, is less likely to collapse, and can be easily wound around the core.

[0102] Although the present invention has been described above using embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications and improvements can be made to the above embodiments. Furthermore, it is clear from the claims that such modifications and improvements can also be included within the technical scope of the present invention. [Example]

[0103] The present invention will be described in detail below with reference to examples, but the present invention is not limited to the examples shown below.

[0104] The kitchen towel rolls of Examples 1 to 11 and Comparative Examples 1 to 6 shown in Tables 1 and 2 were manufactured through the following processes: (1) papermaking and creping, (2) embossing and laminating, and (3) roll winding. The kitchen towel rolls of all Examples and Comparative Examples were measured for the above-mentioned parameters and evaluated as follows. Note that parameters other than those evaluated below were measured according to the standards or measurement methods described above.

[0105] 1. Design The design of the manufactured kitchen towels was visually inspected by 30 monitors, who evaluated them on a sensory scale, choosing either "the kitchen towel has excellent design" or "the kitchen towel has poor design," and the rating was based on the number of people who chose "the kitchen towel has poor design." The rating criteria were as follows: ◎: 0-1 people felt that the kitchen towels had poor design. 〇: 2-4 people felt that the kitchen towels had poor design △: 5-7 people felt that the kitchen towels had poor design. ×: Eight or more people felt that the kitchen towels had poor design.

[0106] 2. Foreign matter adhering to the embossing roll The adhesion of foreign matter to the embossing roll during the papermaking process was evaluated through actual processing. The evaluation criteria were as follows: ◎: No foreign matter adhered to the embossing roll, and productivity (operability) was very good. Good: There was little adhesion of foreign matter to the embossing roll, and productivity (operability) was good. △: Foreign matter adhesion to the embossing roll was at a normal level, and there was no problem with productivity (operability). ×: The amount of foreign matter adhering to the embossing roll was higher than normal, causing problems in productivity (operability).

[0107] 3. Ply peeling A sensory evaluation of kitchen towel "ply peeling" was conducted by 30 panelists. Each panelist selected either "the ply of the sheet has peeled off" or "the ply of the sheet has not peeled off" for a single sheet cut along the perforations at the outermost, central, and innermost periphery of a kitchen towel roll, and rated it on a four-point scale based on the number of people who selected "the ply of the sheet has peeled off." The evaluation criteria are as follows: ◎: 0-1 people selected "The sheet ply is peeling off" 〇: 2-4 people chose "The ply of the seat is peeling off" △: 5-7 people chose "The sheet ply is peeling off" ×: Eight or more people selected "The sheet ply is peeling off"

[0108] 4.Water absorption The amount of water absorbed per unit area of ​​the produced kitchen towel sheets was measured and evaluated on a four-point scale according to the following criteria: ◎: Water absorption per unit area is 380g / m 2 When the above 〇: Water absorption per unit area is 330g / m 2 More than 380g / m 2 When less than △: Water absorption per unit area is 290g / m 2 More than 330g / m 2 When less than ×: Water absorption per unit area is 290g / m 2 When less than

[0109] [Table 1]

[0110] [Table 2]

[0111] As is clear from the results shown in Tables 1 and 2, the kitchen towel rolls of Examples 1 to 11 were good in all aspects of design, adhesion of foreign matter to the embossing roll, ply peeling, and water absorbency. In contrast, the kitchen towel rolls of Comparative Examples 1 to 6 were poor in all aspects of design, adhesion of foreign matter to the embossing roll, ply peeling, and water absorbency. In particular, Comparative Example 6, which did not use a TAD for drying in the papermaking process, was good in all other evaluation items, but had significantly poor water absorbency.

[0112] Therefore, it was confirmed that the kitchen towel roll of the present invention can provide a kitchen towel roll that is excellent in design, adhesion of foreign matter to the embossing roll, ply peeling, and water absorbency. [Explanation of symbols]

[0113] 1: Kitchen towel roll 1a: surface 1b: Back side 1c: Perforation 1d: Core (paper tube) 1e: The outermost edge of the kitchen towel roll 1x: Kitchen towel 10: Sheet 11: Irregularities caused by the papermaking process 12: Embossed pattern 12a: Linear embossing 13: Radial embossing 14: Closed ring structure embossing 14A: Closed ring structure embossed A 14B: Closed ring structure embossed B 14C: Closed ring structure embossed C 14a: Reference point (of closed ring structure embossed A) 14b: Measurement point (of closed ring structure embossment B) 14c: Measurement point (of closed ring structure embossment C) 14x:Reference line 14y, 14z: Auxiliary line 15: Grid including embossing 16: Grids without embossing 20: Test piece 20a,20d: Corner 21: Holder 40a: Pulp slurry 40b: Wet paper 40c: dry sheet 41: Head box 42: First fabric (forming fabric) 43: Second fabric (textured fabric) 44: Forming roll 45:Through air dryer 46: Yankee Dryer

Claims

1. A kitchen towel roll in which an embossed pattern is applied to at least the front ply and two or more plies of laminated kitchen towels are wound into a roll, the area ratio of the embossed pattern by a grid division method is 40% or more and 86% or less, The water absorption capacity per unit area of ​​the kitchen towel is 290 g / m ２ 600g / m or more ２ A kitchen towel roll characterized by:

2. 2. The kitchen towel roll according to claim 1, wherein the kitchen towel has a concave-convex pattern derived from a papermaking process that is different from the embossed pattern.

3. 3. The kitchen towel roll according to claim 1, wherein the peel strength between the glue- or water-bonded plies of the kitchen towel is 5 cN / 76 mm or more and 30 cN / 76 mm or less.

4. 3. The kitchen towel roll according to claim 1, wherein the thickness of the kitchen towel is 0.35 mm or more and 0.80 mm or less.

5. The basis weight of the kitchen towel is 30 g / m ２ 54g / m or more ２ 3. The kitchen towel roll according to claim 1, wherein:

6. 3. The kitchen towel roll according to claim 1, wherein the water absorbency of the kitchen towel is 1.8 seconds / 1 ml or less.

7. 3. The kitchen towel roll according to claim 1, wherein the embossing pattern comprises radial embossing and closed-ring structure embossing.

8. 8. The kitchen towel roll according to claim 7, wherein the radial embossments and the closed-ring structure embossments are alternately arranged at equal intervals.

9. 9. The kitchen towel roll according to claim 8, wherein the arrangement angle of adjacent identical patterns of the radial embossings and the closed-ring structure embossings is 20° or more and 80° or less with respect to the CD direction of the kitchen towel.

10. 3. The kitchen towel roll according to claim 1, wherein the proportion of linear embossed portions included in the embossed pattern is 20% or more.

11. The roll density is 0.04 g / cm ３ 0.13g / cm or more ３ 3. The kitchen towel roll according to claim 1, wherein:

12. 3. The kitchen towel roll according to claim 1, wherein the kitchen towel is dried by TAD (Through Air Drying) during the papermaking process.

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