Kitchen towel roll

Abstract

To provide a kitchen towel roll to which an embossment pattern having both appropriate water diffusibility and holding property is imparted and which is excellent in sheet design.SOLUTION: A kitchen towel roll winds up a kitchen towel sheet laminating sheets with embossment patterns imparted on at least the right surface in 2 ply. The embossment pattern includes a radial embossment and a ring closure structure embossment, each of a radial embossment and the ring closure structure embossment is disposed at equal intervals by turns. An amount of water absorption per unit area of the kitchen towel sheet is between 240 g / m2 and 610 g / m2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] In recent years, various kitchen towel sheets and kitchen towel rolls made by rolling up sheets have been developed and sold.

[0003] For kitchen towels, absorbency and a firm feel when used are important, and for regular base paper, papermaking techniques have been developed to increase the basis weight to improve absorbency and to increase the strength of the base paper to give it a firm feel.

[0004] On the other hand, the so-called TAD (Through Air Drying) papermaking technology (hereinafter also referred to as the "TAD papermaking method"), which uses air drying, produces base paper with high water absorbency and a soft texture, making it excellent as base paper for kitchen towel rolls.

[0005] Kitchen towel sheets made using TAD papermaking technology are characterized by their excellent water absorption, and embossed patterns and other techniques are being investigated to further enhance water absorption.

[0006] As a prior art document relating to kitchen towel rolls, for example, Patent Document 1 describes a kitchen towel roll in which sheets with embossed patterns are glued together and laminated into two plies, and the resulting kitchen towel sheet is wound into a roll. The kitchen towel sheet has a pattern of protrusions and recesses derived from the papermaking process that is different from the embossed pattern, and the basis weight of the two plies is 30 g / m. 2 More than 54g / m 2 The following is a paper thickness of 1.3 mm / 10 sheets or more and 5 mm / 10 sheets or less, 2 ply, 1 m 2The kitchen towel roll is characterized by having a water absorption per roll of 220 g to 600 g, a roll length of 14 m to 44 m, and a roll diameter of 110 mm to 189 mm. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2022-116768 Summary of the Invention [Problem to be solved by the invention]

[0008] Kitchen towel sheets made using TAD papermaking technology are bulky and highly absorbent, but because they are so absorbent, only a portion of the sheet absorbs water, making it difficult for the entire sheet to fully absorb water.

[0009] To solve the above problems, embossing can be used to diffuse absorbed water with a certain degree of directionality, but if the embossed area ratio to the sheet is too large, the base paper will be crushed during processing, which will tend to result in reduced water absorbency.

[0010] On the other hand, if the sheet is not embossed, the sheet will have poor design quality. Therefore, it has been difficult to achieve high levels of both functionality and design in kitchen towel sheets made using TAD papermaking technology.

[0011] 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 that provides both appropriate water diffusion and retention, and also has excellent sheet design. [Means for solving the problem]

[0012] The inventors conducted extensive research and discovered that the above-mentioned problems can be solved by forming an embossed pattern in a kitchen towel roll by laminating two plies of sheets, at least one of which has an embossed pattern, and winding the resulting kitchen towel roll into a roll, the embossed pattern including radial embossing and closed-ring structure embossing, and the radial embossing and the closed-ring structure embossing are alternately arranged at equal intervals, and the water absorption per unit area of ​​the kitchen towel sheet is set within a predetermined numerical range, thereby forming an embossed pattern that has both appropriate water diffusion and retention properties and also provides a kitchen towel roll with excellent sheet design, thereby leading to the completion of the present invention.

[0013] (1) The first aspect of the present invention is a kitchen towel roll in which a kitchen towel sheet is formed by laminating two plies of sheets each having an embossed pattern on at least the front ply, the embossed pattern including radial embossing and closed-ring structure embossing, and the radial embossing and the closed-ring structure embossing are alternately arranged at equal intervals, and the water absorption per unit area of ​​the kitchen towel sheet is 240 g / m 2 More than 610g / m 2 A kitchen towel roll characterized by the following:

[0014] (2) The second aspect of the present invention is the kitchen towel roll described in (1), characterized in that none of the linear embossed portions included in the embossing pattern are parallel to the MD direction of the kitchen towel sheet.

[0015] (3) A third aspect of the present invention is the kitchen towel roll described in (1), characterized in that the kitchen towel sheet has an uneven pattern resulting from the papermaking process that is different from the embossed pattern.

[0016] (4) A fourth aspect of the present invention is the kitchen towel roll according to (1), wherein the basis weight per two plies of the kitchen towel sheet is 30 g / m2 More than 54g / m 2 It is characterized by the following:

[0017] (5) A fifth aspect of the present invention is the kitchen towel roll described in (1), characterized in that the tensile strength (DCDT) of the kitchen towel sheet in the CD direction when dry, based on JIS P 8113, is 400 cN / 25 mm or more and 1400 cN / 25 mm or less.

[0018] (6) The sixth aspect of the present invention is the kitchen towel roll described in (1), characterized in that the wet CD tensile strength (WCDT) of the kitchen towel sheet according to the old JIS S 3104 is 160 cN / 25 mm or more and 390 cN / 25 mm or less.

[0019] (7) A seventh aspect of the present invention is the kitchen towel roll according to (1), characterized in that the water absorption rate (1.0 ml) of the kitchen towel sheet is 1.8 seconds or less.

[0020] (8) The eighth aspect of the present invention is the kitchen towel roll described in (2), characterized in that the proportion of the linear embossed portion contained in the embossed pattern is 20% or more. [Effects of the Invention]

[0021] According to the present invention, it is possible to provide a kitchen towel roll that has an embossed pattern that provides both appropriate water diffusion and retention, and that also has excellent sheet design. [Brief explanation of the drawings]

[0022] [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 a method for measuring the water absorption of the kitchen towel sheet of the present invention. [Figure 4] 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

[0023] 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.

[0024] Furthermore, the MD direction of the kitchen towel sheet is the machine direction in which the kitchen towel sheet is made, and the CD direction is the direction perpendicular to the MD direction (cross direction).

[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 sheet 1x made by laminating two plies of sheets each having an embossed pattern 10 on at least the front ply, and wound into a roll. Preferably, the kitchen towel sheet 1x has perforations formed across the width of the roll at approximately equal intervals in the winding direction of the roll (not shown). As shown in Figure 1, the surface of the kitchen towel sheet 1x facing the outside of the roll is referred to as surface 1a (surface of the kitchen towel sheet 1x), and the surface facing the center of the roll is referred to as back surface 1b (back surface of the kitchen towel sheet 1x). The edge of the kitchen towel sheet 1x is referred to as the outermost edge 1e of the kitchen towel roll 1.

[0026] 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.

[0027] (winding length and winding diameter) The lower limit of the roll length of the kitchen towel roll 1 is preferably 18 m or more, more preferably 20 m or more, and even more preferably 24 m or more, and 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 roll length is less than 18 m, the basis weight of the kitchen towel sheet 1x must be increased to achieve a certain roll diameter DR, resulting in poor water diffusion. If the roll length is more than 45 m, the basis weight of the kitchen towel sheet 1x must be decreased to achieve a certain roll diameter DR, resulting in poor water retention.

[0028] The roll length is measured as follows: First, measure the length of 10 kitchen towel sheets 1x between the perforations 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 1.80 m and there are 150 sheets, the roll length is 1.80 m x (150 / 10) = 27 m. Note that if kitchen towel roll 1 does not have perforations, measure the roll length.

[0029] The lower limit of the roll diameter DR of the kitchen towel roll 1 according to this embodiment is preferably 127 mm or more, more preferably 135 mm or more, and even more preferably 140 mm or more, and the upper limit is preferably 175 mm or less, more preferably 165 mm or less, and even more preferably 157 mm or less. If the roll diameter DR is less than 127 mm, the basis weight of the kitchen towel sheet 1x will be low, resulting in poor water retention. If the roll diameter DR is more than 175 mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor water diffusion.

[0030] The roll diameter DR 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.

[0031] (roll width and roll weight) The roll width of the kitchen towel roll 1 has a lower limit of preferably 150 mm or more, more preferably 200 mm or more, and even more preferably 250 mm or more, and an upper limit of preferably 380 mm or less, more preferably 340 mm or less, and even more preferably 300 mm or less. If the roll width is less than 150 mm, the kitchen towel sheet 1x will be too small and will have poor water retention, whereas if the roll width is more than 380 mm, the kitchen towel sheet 1x will be too large and will have poor diffusion properties.

[0032] The roll weight of the kitchen towel roll 1 preferably has a lower limit of 200 g or more, more preferably 240 g or more, and even more preferably 260 g or more, and preferably has an upper limit of 550 g or less, more preferably 490 g or less, and even more preferably 450 g or less. If the roll weight is less than 200g, the basis weight of the kitchen towel sheet 1x will be low and the water retention will be poor. If the roll weight is more than 550g, the basis weight of the kitchen towel sheet 1x will be high and the water diffusion will be poor.

[0033] The roll weight is the weight per 280mm roll width, excluding the paper tube (core) of kitchen towel roll 1. If the roll width is not 280mm, convert it to the weight per 280mm by proportional calculation.

[0034] (roll density) The roll density of the kitchen towel roll 1 according to this embodiment has a lower limit of 0.04 g / cm 3 It is preferable that the concentration is 0.05 g / cm or more. 3 More preferably, it is 0.06 g / cm or more. 3 The upper limit is more preferably 0.13 g / cm. 3 Preferably, it is 0.11 g / cm or less. 3 More preferably, it is 0.09 g / cm or less. 3 It is more preferable that: Roll density is 0.05g / cm 3 If the roll density is less than 0.13 g / cm, the paper thickness of the kitchen towel sheet will be too thick and the water diffusion will be poor. 3 If the thickness exceeds this, the paper thickness of the kitchen towel sheet 1x will be low and the water retention will be poor.

[0035] Roll density is expressed as (roll weight) ÷ (roll volume). Roll weight is the weight of a kitchen towel roll 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 weight (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:

[0036] (winding density) The winding density of the kitchen towel roll 1 according to this embodiment has a lower limit of 0.20 m / cm 2 It is preferable that the thickness is 0.24 m / cm or more. 2 More preferably, it is 0.30 m / cm or more. 2 The upper limit is more preferably 0.56 m / cm. 2Preferably, it is 0.50 m / cm or less. 2 More preferably, it is 0.45 m / cm or less. 2 It is more preferable that: Winding density is 0.20m / cm 2 If the winding density is less than 0.56 m / cm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor water diffusion. 2 If the thickness exceeds this value, the basis weight of the kitchen towel sheet 1x will be low and the water retention will be poor.

[0037] The winding density is expressed as (winding length × number of plies) ÷ (cross-sectional area of ​​the roll). The cross-sectional area of ​​the roll is expressed as {cross-sectional area of ​​the 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, winding diameter DR of 150 mm, and core outer diameter DI of 39 mm, the winding density = (27 m × 2) ÷ {3.14 × (150 mm ÷ 2 ÷ 10)} 2 -3.14×(39mm÷2÷10) 2}=0.33m / cm 2 This becomes:

[0038] (Core outer diameter) The core outer diameter DI of the kitchen towel roll 1 of the present invention is preferably 28 mm or more, more preferably 33 mm or more, and even more preferably 40 mm or more, and the upper limit 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 DI is less than 28 mm, the resulting roll diameter DR will be small, and therefore, to maintain a certain range of roll diameter DR, the basis weight of the kitchen towel sheet 1x must be increased, resulting in poor water diffusibility.If the core outer diameter DI exceeds 58 mm, the resulting roll diameter DR will be large, and therefore, to maintain a certain range of roll diameter DR, the basis weight of the kitchen towel sheet 1x must be decreased, resulting in poor water retention.

[0039] 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 does not have a paper tube, the outer diameter of the hollow core portion is measured.

[0040] <Kitchen towel sheet> (Basic weight) The basis weight per two plies of the kitchen towel sheet 1x according to this embodiment is 30 g / m 2 More than 54g / m 2 The basis weight per two plies is 30 g / m 2 If the thickness is less than 54 g / m², the kitchen towel sheet 1x will have poor water retention. 2 Above this level, the water diffusion performance of 1x kitchen towel sheet becomes poor. The minimum basis weight per product ply for a kitchen towel sheet is 36 g / m 2 It is preferable that the weight is 38 g / m or more. 2 The upper limit is more preferably 48 g / m or more. 2 Preferably, it is 45 g / m or less. 2 More preferably, it is:

[0041] In addition, the minimum basis weight per ply of a kitchen towel sheet is 15 g / m 2 It is preferable that the weight is 18 g / m or more. 2 More preferably, it is 19 g / m or more. 2 The upper limit is more preferably 27 g / m or more. 2 Preferably, it is 24 g / m or less. 2 More preferably, it is 22.5 g / m or less. 2 It is more preferable that the basis weight per ply is 15 g / m or less. 2 If the ply weight is less than 27 g / m, the kitchen towel sheet 1x will have poor water retention. 2 Above this level, the water diffusion performance of 1x kitchen towel sheet becomes poor. The basis weight of the kitchen towel sheet 1x can be measured based on JIS P 8124.

[0042] (paper thickness) The lower limit of the paper thickness per two plies of the kitchen towel sheet 1x is preferably 0.35 mm or more, more preferably 0.40 mm or more, and even more preferably 0.45 mm or more. The upper limit is preferably 0.80 mm or less, more preferably 0.75 mm or less, and even more preferably 0.70 mm or less. If the paper thickness per two plies is less than 0.35 mm, the kitchen towel sheet 1x will have poor water retention. If the paper thickness per two plies is more than 0.80 mm, the kitchen towel sheet 1x will have poor water diffusion.

[0043] The paper thickness per two plies can be measured using a thickness gauge (a dial thickness gauge "PEACOCK" manufactured by Ozaki Seisakusho Co., Ltd.). The measurement conditions are a measurement load of 37.85 gf / cm 2 The gauge head has a diameter of 30 mm. Place the sample between the gauge head and the measuring table, and read the gauge when the gauge head is lowered at a speed of 1 mm per second or less. The sample is a kitchen towel sheet, 10 plies in length (5 sets of 2 plies = 10 plies), and the measurements are proportionally calculated to obtain the value per 2 plies. The measurement is also repeated 10 times at different locations, and the average of the measurement results is used as the final paper thickness per 2 plies.

[0044] (seat length) The sheet length between perforations (the length of the kitchen towel sheet 1x in the direction of winding the roll) has a lower limit of preferably 100 mm or more, more preferably 130 mm or more, and even more preferably 150 mm or more, and an upper limit of 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 kitchen towel sheet 1x will have poor water retention, and if the sheet length is more than 250 mm, the kitchen towel sheet 1x will be too long and will have poor water diffusion.

[0045] (specific volume) The specific volume of one kitchen towel sheet is lower than 7cm 3 / g or more is preferable, and 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, and 3 / g or less is more preferable, and 17cm 3 It is more preferable that the saturation coefficient is 1 / g or less. The specific volume of one kitchen towel sheet is 7cm 3 If the specific volume of the kitchen towel sheet 1x is less than 23 cm3 / g, the kitchen towel sheet 1x will have poor water retention. 3 If the specific volume exceeds 1 / g, the kitchen towel sheet 1x will have poor water diffusion properties. The specific volume is calculated by dividing the paper thickness per ply of the kitchen towel sheet 1x by the basis weight per ply (the paper thickness per product ply is the basis weight per product ply), and then calculating the volume (cm) per unit (g). 3 )

[0046] (DMDT and DCDT) The dry machine direction tensile strength (DMDT) of the kitchen towel sheet 1x in the dry state according to 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, and the upper limit 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 600cN / 25mm, the basis weight of the kitchen towel sheet 1x will be low, resulting in poor water retention. If the DMDT is more than 1500cN / 25mm, the basis weight of the kitchen towel sheet 1x will be high, resulting in poor water diffusion.

[0047] Furthermore, the dry cross direction tensile strength (DCDT) of the kitchen towel sheet 1x 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 DCDT is less than 400cN / 25mm, the resulting kitchen towel sheet 1x will have a low basis weight and poor water retention, while if the DCDT is more than 1400cN / 25mm, the resulting kitchen towel sheet 1x will have a high basis weight and poor water diffusion.

[0048] The dry cross direction tensile strength (DCDT) of the kitchen towel sheet 1x according to JIS P 8113 is preferably 600 cN / 25 mm or more, more preferably 750 cN / 25 mm or more, and more preferably 1300 cN / 25 mm or less, more preferably 1150 cN / 25 mm or less. The DMDT and DCDT of one kitchen towel sheet are measured in accordance with JIS P 8113.

[0049] (WMDT and WCDT) Furthermore, the wet machine direction tensile strength (WMDT) of the kitchen towel sheet 1x according to the old JIS S 3104 is preferably 210 cN / 25 mm or more, more preferably 230 cN / 25 mm or more, and even more preferably 260 cN / 25 mm or more, and the upper limit is preferably 450 cN / 25 mm or less, more preferably 400 cN / 25 mm or less, and even more preferably 360 cN / 25 mm or less. If the WMDT is less than 210 cN / 25 mm, the resulting kitchen towel sheet 1x will have a low basis weight and poor water retention, while if the WMDT is more than 450 cN / 25 mm, the resulting kitchen towel sheet 1x will have a high basis weight and poor water diffusion.

[0050] The wet cross direction tensile strength (WCDT) of the kitchen towel sheet 1x according to the old JIS S 3104 is preferably 160 cN / 25 mm or more and 390 cN / 25 mm or less. If the WCDT is less than 160cN / 25mm, the resulting kitchen towel sheet 1x will have a low basis weight and poor water retention, while if the WCDT is more than 390cN / 25mm, the resulting kitchen towel sheet 1x will have a high basis weight and poor water diffusion.

[0051] The wet cross direction tensile strength (WCDT) of the kitchen towel sheet 1x according to the old JIS S 3104 is preferably 190 cN / 25 mm or more, more preferably 220 cN / 25 mm or more, and more preferably 350 cN / 25 mm or less, more preferably 300 cN / 25 mm or less. The WMDT and WCDT of one kitchen towel sheet are measured in accordance with the old JIS S 3104.

[0052] (Embossed) The kitchen towel roll 1 (kitchen towel sheet 1x) of this embodiment is embossed and has an embossed pattern 10. Furthermore, the kitchen towel sheet 1x of the present invention is formed by laminating two plies after embossing at least the front ply. When laminating two plies, it is preferable to use, for example, ply bond glue to apply the glue and perform the bonding process. By bonding the plies together in this way to form two plies, the plies are strongly bonded together, and the kitchen towel sheet 1x is less likely to tear or peel off even when wet. Furthermore, water may be used instead of ply bond glue, or a mixture of glue and water may be used.

[0053] The ply on the front surface 1a of the kitchen towel sheet 1x preferably has an embossed pattern 10. 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 does not have (or do not have). By not having an embossed pattern on the back surface 1b, the kitchen towel sheet 1x (kitchen towel roll 1) can have an excellent texture.

[0054] FIG. 2 is a diagram showing an example of an embossed pattern 10 in the kitchen towel roll of this embodiment. The embossed pattern 10 includes radial embossments 11 and closed-ring structure embossments 12, and the radial embossments 11 and the closed-ring structure embossments 12 are alternately arranged at equal intervals. If the radial embossments 11 are not included, the kitchen towel sheet 1x will have poor water diffusibility. If the closed-ring structure embossments 12 are not included, the kitchen towel sheet 1x will have poor water retention.

[0055] 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 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. 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.

[0056] The size of the embossed pattern 10, which includes one radial embossment 11 and one closed-ring structure embossment 12, has a lower limit of 16 cm 2 Preferably, it is 28cm or more. 2 More preferably, it is 45cm or more. 2 The upper limit is more preferably 250 cm or more. 2 Preferably less than 180cm 2 It is more preferable that it is less than 110cm 2 It is more preferable that: Embossing pattern 10 is 16cm in size 2 If the size of the embossed pattern 10 is less than 150 cm, the embossed pattern 10 will be too small and the kitchen towel sheet 1x will have poor water retention. 2 If the embossing pattern is larger than 10, the kitchen towel sheet 1x will have poor water diffusion properties. 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 2. 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).

[0057] The embossed pattern 10 includes linear embossed portions 100, but it is preferable that none of the linear embossed portions 100 included in the embossed pattern 10 are parallel to the MD direction of the kitchen towel sheet 1x. Since none of the linear embossed portions 100 are parallel to the MD direction of the kitchen towel sheet 1x, the kitchen towel sheet 1x becomes less likely to tear.

[0058] Furthermore, it is preferable that the proportion of linear embossed portions 100 included in the embossed pattern 10 is 20% or more. If the proportion is less than 20%, the embossed pattern 10 cannot contribute to improving the diffusion and retention properties, and the kitchen towel sheet 1x will have poor diffusion and retention properties. The proportion of the linear embossed portions 100 contained in the embossed pattern 10 is more preferably 50% or more, and even more preferably 90% or more.

[0059] In this case, the linear embossed portion 100 refers to an embossment having a thickness of 0.1 mm to 4 mm and a length of 5 mm or more. The proportion of the linear embossed portion 100 is determined as follows. First, any 100mm x 100mm area on the surface of the kitchen towel sheet 1x with the embossed pattern 10 is divided into 10mm squares. Then, the proportion of the linear embossed portion 100 is calculated using the following formula. Note that if a single square contains both linear embossing and dot embossing, the square with the larger embossing percentage is used. (Number of squares containing linear embossing / Number of squares containing any embossing) x 100 = Percentage of linear embossing in 100 (%)

[0060] Furthermore, there is no particular restriction on whether the back surface 1b of the kitchen towel sheet 1x has an embossed pattern 10, as long as it has a pattern of protrusions and recesses resulting from the papermaking process that is different from the embossed pattern 10 described below. Nested embossing or pin-to-pin embossing may be applied, or no embossing may be applied, but nested embossing or no embossing is preferred, and no embossing is more preferred.

[0061] (Water absorption) In the present invention, the water absorption per unit area of ​​a kitchen towel sheet 1x is 240 g / m 2 More than 610g / m 2 The water absorption per unit area is 240g / m 2 If the thickness is less than 610g / m, the water retention of the kitchen towel sheet 1x will be poor. 2 If the temperature exceeds this range, the water diffusibility will be poor. The minimum water absorption per unit area of ​​one kitchen towel sheet is 290 g / m 2 It is preferable that the weight is 380 g / m or more. 2 The upper limit is more preferably 550 g / m or more. 2 Preferably, it is 500 g / m or less. 2 More preferably, it is:

[0062] The water absorption per unit weight of the kitchen towel sheet 1x 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, and the upper limit is preferably 14 g / g or less, and even more preferably 13 g / g or less. If the water absorption per unit weight is less than 8.0 g / g, the kitchen towel sheet 1x will have poor water diffusibility.

[0063] The method for measuring the water absorption of each kitchen towel sheet 1x will be described below with reference to FIG. First, a two-ply kitchen towel sheet 1x is taken and cut using a square template with each piece measuring 7.6 cm (3 inches) to prepare a rectangular test piece 20 with each side measuring 7.6 cm. The weight of the test piece 20 before water absorption is measured using an electronic balance. The test piece 20 is set in a holder 22 (a jig that fixes three points of the test piece, the jig being made of a metal that does not absorb water).

[0064] Next, distilled water is poured into a commercially available tray to a depth of 2 cm, and the test specimen 20 set in the holder 22 is immersed in the distilled water for 2 minutes. After immersion for 2 minutes, the test specimen 20 and holder 22 are removed from the distilled water, and a strip 21 is attached to one corner 20d of the test specimen 20 as shown in Figure 3. The strip 21 is made by peeling the same two-ply kitchen towel as the kitchen towel to be measured into one ply, cutting this paper kitchen towel into a piece measuring 2 mm x 15 mm, and attaching it to a section 6 mm from the corner 20d toward the center of the test specimen 20. Next, the holder 22 and test specimen 20 are hung from a rod placed in an empty water tank with the corner 20a opposite corner 20d facing up, and the tank lid is closed and left for 15 minutes.

[0065] Thereafter, the holder 22 and the test piece 20 are taken out of the water tank, the band 21 and the holder 22 are removed, and the weight of the test piece 20 is measured using an electronic balance. From the change in weight of the test piece 20 before and after immersion in distilled water, the amount of distilled water absorbed per unit area of ​​the test piece 20 (g of water / sheet m 2 , 1m 2 Hit. Abbreviated as g / m 2 ) is calculated. 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.

[0066] (Water absorption rate) The water absorption rate (0.1 ml) of the kitchen towel sheet 1x is preferably 1.8 seconds / 0.1 ml or less. If the water absorption rate (0.1 ml) exceeds 1.8 seconds / 0.1 ml, the water absorbency of the kitchen towel sheet 1x will be poor. The water absorption rate (0.1 ml) of the kitchen towel sheet 1x is more preferably 1.5 seconds / 0.1 ml or less, and even more preferably 1.0 seconds / 0.1 ml or less.

[0067] Furthermore, the water absorption rate (1.0 ml) of the kitchen towel sheet 1x is preferably 1.8 seconds / 1.0 ml or less. If the water absorption rate (1.0 ml) exceeds 1.8 seconds / 1.0 ml, the kitchen towel sheet 1x will have poor water absorbency. The water absorption rate (1.0 ml) of the kitchen towel sheet 1x is more preferably 1.5 seconds / 1.0 ml or less, and even more preferably 1.0 seconds / 1.0 ml or less. It should be noted that if the water absorption rate is less than 1.0 second, it is difficult to measure the value accurately (for example, to measure less than 1 second with a stopwatch, the button must be pressed quickly), so the rate can be uniformly set to less than 1.0 second.

[0068] After measuring the water absorption rate (1.0 ml) of the kitchen towel sheet 1x, the lower limit of the length of the longest part of the part where water has diffused after 1 minute is preferably 6 mm or more, more preferably 7 mm or more, and even more preferably 8 mm or more. The upper limit is preferably 15 mm or less, more preferably 13 mm or less, and even more preferably 11 mm or less. If the length of the longest part is less than 6 mm, the kitchen towel sheet 1x will have poor water diffusibility. If the length of the longest part is more than 15 mm, the kitchen towel sheet 1x will have poor water retention.

[0069] The water absorption rate (0.1 ml) of one kitchen towel sheet is measured in accordance with the old JIS S 3104. The water absorption rate (1.0 ml) of the kitchen towel sheet 1x was measured by dropping 0.1 ml every second and measuring the time (seconds) it took for the water droplet to be absorbed after 1.0 ml was dropped. Note that the measurement of the "longest length of the portion of the kitchen towel sheet where water has diffused 1 minute after measuring the water absorption rate (1.0 ml)" was taken 1 minute after the water droplet (1.0 ml) was absorbed.

[0070] The kitchen towel sheet 1x preferably contains wet pulp. The wet pulp content is preferably 50% or more. If the wet pulp content is less than 50%, the kitchen towel sheet 1x will have poor water retention. While there is no upper limit for the wet pulp content, if it is too high, the strength of the kitchen towel sheet 1x will tend to increase, which may result in a poor texture. The wet pulp content in the kitchen towel sheet 1x is more preferably 65% ​​or more, and even more preferably 80% or more.

[0071] As the pulp, for example, softwood bleached kraft pulp (NBKP), hardwood bleached kraft pulp (LBKP), etc. can be used, and the content ratio thereof is preferably NBKP:LBKP=40-100% by mass:0-60% by mass, more preferably NBKP:LBKP=50-90% by mass:10-50% by mass, and even more preferably NBKP:LBKP=60-80% by mass:20-40% by mass.

[0072] <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 sheet 1x.

[0073] In this case, it is preferable that a concave-convex pattern derived from the papermaking process (fabric), different from the above-mentioned embossed pattern, is applied to the kitchen towel sheet 1x in the papermaking process. By having this concave-convex pattern, the water absorption capacity of the kitchen towel sheet 1x can be further increased. Here, "originating from the papermaking process" means that, in the papermaking process for the kitchen towel sheet 1x, an uneven pattern is imparted between the headbox of the papermaking machine and the outlet of the Yankee dryer 32. Specifically, in part of the papermaking process shown in Figure 4, unevenness can be imparted in the (belt) press section 30, which is arranged between the dewatering roll 31 and the Yankee dryer 32. In the (belt) press section 30, the wet paper 34 and the uneven belt 33 (the uneven belt 33 loops between the (belt) press section 30 and the Yankee dryer 32) are pressed together, thereby imparting an uneven pattern to the wet paper 34. Note that the uneven belt 33 may be an uneven fabric (wire).

[0074] The uneven pattern can be changed as needed by changing the fabric pattern (fine pattern, coarse pattern). Changing the uneven pattern will change the specific volume (paper thickness), but it is preferable to select a pattern that will keep the specific volume in the rolled state within the above-mentioned numerical range.

[0075] As described above, according to this embodiment, an embossed pattern is imparted that provides both appropriate water diffusion and retention, and a kitchen towel roll with excellent sheet design can be provided.

[0076] 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]

[0077] 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.

[0078] The kitchen towel rolls of Examples 1 and 2 and Comparative Examples 1 to 4 shown in Table 1 were manufactured through the following processes: (1) papermaking and creping, (2) embossing and laminating, and (3) roll winding. The kitchen towel roll packages 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.

[0079] 1. Diffusion of water when absorbed into the sheet The water diffusibility of the manufactured kitchen towel sheets was evaluated by 30 monitors, and the number of people who felt that the sheet had poor water diffusibility was rated on a two-point scale. The evaluation criteria were as follows: ◎: 0-1 person felt that the sheet had poor water diffusion properties 〇: 2-4 people felt that the sheet had poor water diffusion properties △: 5-7 people felt that the sheet had poor water diffusion properties ×: Eight or more people felt that the sheet had poor water diffusion properties

[0080] 2. Water retention when the sheet absorbs water The water retention of the manufactured kitchen towel sheets was evaluated by a sensory test conducted by 30 test subjects, and the results were rated on a two-point scale based on the number of test subjects who felt that the sheets had poor water retention. The evaluation criteria were as follows: ◎: 0-1 people felt that the sheet had poor water retention. 〇: 2-4 people felt that the sheet had poor water retention. △: 5-7 people felt that the sheet had poor water retention. ×: Eight or more people felt that the sheet had poor water retention.

[0081] 3. Seat design The design of the manufactured kitchen towel sheets was visually inspected by 30 monitors, who evaluated the design on a two-point scale based on the number of people who felt the sheet had poor design. The evaluation criteria were as follows: ◎: 0-1 people felt that the seat design was poor 〇: 2-4 people felt that the seat design was poor △: 5-7 people felt that the seat design was poor ×: Eight or more people felt that the seat design was poor.

[0082] 4. The sheet is resistant to tearing during use The tear resistance of the manufactured kitchen towel sheets was evaluated by 30 test subjects, and the test was rated on a two-point scale based on the number of test subjects who felt that the sheets were "easy to tear when used." The evaluation criteria were as follows: ◎: 0-1 people felt that the sheet was easily torn during use 〇: 2-4 people felt that the sheet was easily torn during use △: 5-7 people felt that the sheet was easily torn during use ×: Eight or more people felt that the sheet was easily torn during use.

[0083] [Table 1]

[0084] As is clear from the results shown in Table 1, the kitchen towel rolls of Examples 1 and 2 were good in terms of water diffusibility upon absorption, water retention upon absorption, and design. Furthermore, Example 1 also had excellent tear resistance during use. In contrast, the sheets of Comparative Examples 1 to 4 were all poor in terms of water diffusibility upon absorption, water retention upon absorption, and design. Therefore, it has been confirmed that the kitchen towel roll of the present invention has an embossed pattern that provides both appropriate water diffusion and retention, and also provides a kitchen towel roll with excellent sheet design. [Explanation of symbols]

[0085] 1 kitchen towel roll 1a surface 1b back side 1e The outermost edge of a kitchen towel roll 1x kitchen towel sheet 10 Embossing Pattern 11 Radial Embossing 12 Closed ring structure embossing 20 test specimens 20a,20d corner 21 Obi 22 Holder 30 (Belt) Press Section 31 Dewatering roll 32 Yankee Dryer 33 Concave belt 34 Wet Paper 100 Linear embossed part

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 embossing pattern includes radial embossings and closed-ring structure embossings, and the radial embossings and the closed-ring structure embossings are alternately arranged at equal intervals; The water absorption capacity per unit area of ​​the kitchen towel sheet is 240 g / m ２ 610g / m or more ２ A kitchen towel roll characterized by:

2. 2. The kitchen towel roll according to claim 1, wherein none of the linear embossed portions included in the embossing pattern are parallel to the machine direction of the kitchen towel sheet.

3. 2. The kitchen towel roll according to claim 1, wherein the kitchen towel sheet has a pattern of protrusions and recesses derived from a papermaking process, which is different from the embossed pattern.

4. The basis weight of the kitchen towel sheet per two plies is 30 g / m ２ 54g / m or more ２ 2. The kitchen towel roll of claim 1, wherein:

5. 2. The kitchen towel roll according to claim 1, wherein the kitchen towel sheet has a tensile strength (DCDT) in the CD direction in a dry state according to JIS P 8113 of 400 cN / 25 mm or more and 1400 cN / 25 mm or less.

6. 2. The kitchen towel roll according to claim 1, wherein the kitchen towel sheet has a wet CD tensile strength (WCDT) according to former JIS S 3104 of 160 cN / 25 mm or more and 390 cN / 25 mm or less.

7. 2. The kitchen towel roll according to claim 1, wherein the kitchen towel sheet has a water absorption rate (1.0 ml) of 1.8 seconds or less.

8. 3. The kitchen towel roll according to claim 2, wherein the proportion of the linear embossed portions included in the embossed pattern is 20% or more.

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