Kitchen towel

Abstract

To provide a kitchen towel capable of exercising excellent water absorption effect and wiping property without inconvenience.SOLUTION: A kitchen towel is a three-ply single-embossing connection sheet, in which two of the sheets are layered in a single-embossing manner and have embossment recesses on one surface and embossment projections corresponding to them on the other surface and the other sheet is a micro-embossing sheet which has micro-embossment recesses smaller in area and shallower than the embossment recesses on one surface and micro-embossment projections corresponding to them on the other surface. The single-embossing connection sheet and the micro-embossing sheet are layered in a double-embossing manner so that the embossment projections face the micro-embossing sheet and are adhered via mediating adhesive glue, the density of the embossing projections is 3 to 30 / cm2, and ratio of an adhesion number contributing to adhesion with respect to a total number of the embossment projections is 30% or more.SELECTED DRAWING: Figure 2

Description

[Technical field]

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

[0002] In the kitchen, kitchen towels are used for draining water and oil from food such as vegetables and meat, wiping off oil from frying pans, wiping off dirt from the dining table, and so on.

[0003] Patent Document 1 proposes a kitchen towel made of three laminated sheets for the purpose of improving the water absorption effect (water retention). In Patent Document 1, two of the three sheets have integral embossed recesses and embossed protrusions by pressing the two sheets together at the same time during embossing. These two sheets and the remaining sheet of the three sheets are laminated such that the embossed protrusions of the two sheets are fitted into the embossed recesses of the remaining sheet while leaving gaps, and are bonded by glue provided on the opposing portions of the embossed protrusions of the two sheets and the embossed recesses of the remaining sheet. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 7104253 Summary of the Invention [Problem to be solved by the invention]

[0005] Patent Document 1 refers to the water absorption performance due to liquid being stored in the gaps between the sheets that make up the kitchen towel. However, in the kitchen towel with the above structure, the gaps between the sheets cannot be made very large due to the laminated structure. Therefore, there is room for improvement in the water absorption effect (water retention).

[0006] Furthermore, in the case of a kitchen towel with the above structure, due to its laminated structure, it was necessary to set the area of ​​the embossed depressions of the sheets constituting the kitchen towel to a certain degree, which made it difficult to obtain scraping performance that utilizes the texture of the kitchen towel, and left room for improvement in the ability to wipe off dirt, etc.

[0007] An object of the present invention is to provide a kitchen towel that can exhibit excellent water absorption (water retention) without any inconvenience and has improved wiping properties for removing dirt and the like. [Means for solving the problem]

[0008] As a result of intensive research to achieve the above object, the present inventors have discovered a kitchen towel comprising three laminated sheets, two of which are single-embossed bonded sheets laminated in a single-embossed laminate structure and having embossed recesses on one side and embossed protrusions corresponding to the embossed recesses on the other side, and the remaining sheet of the three sheets is a micro-embossed sheet having micro-embossed recesses across its entire surface, the micro-embossed recesses being smaller in area and shallower in depth than the embossed recesses of the single-embossed bonded sheet, and having micro-embossed protrusions corresponding to the micro-embossed recesses on the other side, the single-embossed bonded sheet and the micro-embossed sheet being laminated in a double-embossed laminate structure such that the embossed protrusions of the single-embossed bonded sheet face the micro-embossed sheet, and are bonded together via an adhesive interposed between the embossed protrusions of the single-embossed bonded sheet and the micro-embossed sheet, and the density of the embossed protrusions of the single-embossed bonded sheet is 3 pieces / cm 2 More than 30 pieces / cm 2 It has been discovered that the above problem can be solved by a kitchen towel in which the ratio of the number of embossed protrusions of the single embossed bonding sheet that contribute to adhesion to the micro embossed sheet to the total number of embossed protrusions of the single embossed bonding sheet is 30% or more.

[0009] Specifically, the present invention has the following configuration. [1] A kitchen towel consisting of three laminated sheets, Two of the three sheets are single embossed bonded sheets laminated in a single embossed laminate structure, having an embossed recess on one side and an embossed protrusion corresponding to the embossed recess on the other side; one of the three sheets is a micro-embossed sheet having, over its entire surface, micro-embossed depressions on one side that are smaller in area and shallower in depth than the embossed depressions of the single-embossed bonded sheet, and having, over its other surface, micro-embossed protrusions corresponding to the micro-embossed depressions; The single embossed bonded sheet and the micro embossed sheet are laminated in a double embossed laminate structure such that the embossed convex portion of the single embossed bonded sheet faces the micro embossed sheet, and are bonded to each other via an adhesive glue interposed between the embossed convex portion of the single embossed bonded sheet and the micro embossed sheet; The density of the embossed convex parts of the single embossed bonded sheet is 3 pieces / cm 2 More than 30 pieces / cm 2 is as follows: A kitchen towel in which the ratio of the number of embossed convex portions of a single embossed bonded sheet that contribute to adhesion to a micro embossed sheet to the total number of embossed convex portions of the single embossed bonded sheet is 30% or more. [2] The density of the micro-embossed convexities on the micro-embossed sheet is 20 pieces / cm 2 More than 70 pieces / cm 2 A kitchen towel according to [1], characterized in that: [3] The kitchen towel according to [1] or [2], characterized in that the single embossed bonded sheet and the micro embossed sheet are laminated so that the embossed convex portions of the single embossed bonded sheet and the micro embossed convex portions of the micro embossed sheet face each other, and are bonded to each other via an adhesive glue interposed between the embossed convex portions of the single embossed bonded sheet and the micro embossed convex portions of the micro embossed sheet. [4] A kitchen towel according to any one of [1] to [3], characterized in that the single embossed bonded sheet has a non-embossed convex portion on the side having the embossed convex portion, and no adhesive is interposed between the non-embossed convex portion and the micro-embossed sheet. Effect of the Invention

[0010] According to the present invention, it is possible to provide a kitchen towel that can exhibit excellent water absorption effect (water retention) without any inconvenience and has improved wiping properties for removing dirt and the like. [Brief description of the drawings]

[0011] [Figure 1] FIG. 1 is a schematic diagram of a kitchen towel roll. [Diagram 2] 1 is a schematic diagram illustrating a configuration of a kitchen towel according to an embodiment of the present invention. [Diagram 3] FIG. 4 is a diagram illustrating a method for measuring the area and depth of an embossed depression. [Figure 4] FIG. 1 is a schematic diagram of an example of a kitchen towel manufacturing facility. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same reference numerals indicate the same or similar configurations. The following embodiments and drawings are described for illustrative purposes and are not intended to limit the present invention.

[0013] <First embodiment> The kitchen towel according to the first embodiment of the present invention has the following features (1) to (6). (1) This kitchen towel is made up of three sheets stacked together. (2) Of the three sheets, two sheets are single embossed bonded sheets laminated in a single embossed laminate structure having an embossed recess on one side and an embossed protrusion corresponding to the embossed recess on the other side. (3) Of the three sheets, the remaining sheet is a micro-embossed sheet having, over its entire surface, micro-embossed depressions on one side that are smaller in area and shallower in depth than the embossed depressions of the single-embossed bonded sheet, and micro-embossed protrusions on the other side that correspond to the micro-embossed depressions. (4) The single embossed bonding sheet and the micro embossed sheet are laminated in a double embossed type laminate structure so that the embossed convex portion of the single embossed bonding sheet faces the micro embossed sheet, and are bonded to each other via an adhesive glue interposed between the embossed convex portion of the single embossed bonding sheet and the micro embossed sheet. (5) The density of the embossed convexities of the single embossed bonded sheet is 3 pieces / cm 2 More than 30 pieces / cm 2 The following is the result. (6) The ratio of the number of embossed convexities of the single-embossed bonding sheet that contribute to adhesion to the micro-embossed sheet to the total number of embossed convexities of the single-embossed bonding sheet is 30% or more.

[0014] (Kitchen towel roll) Fig. 1 is a schematic diagram of a kitchen towel roll 100 in which a kitchen towel 30 according to a first embodiment of the present invention is wound in a roll shape around a paper tube 5. Fig. 1(a) is an overall perspective view of the kitchen towel roll 100, and Fig. 1(b) is a schematic diagram showing an end face of the kitchen towel roll 100.

[0015] (Paper tube) 1, cardboard tube 5 has a cylindrical shape. The outer diameter of cardboard tube 5, that is, the core diameter DC, is set according to the size of the members (core, hooks, etc.) of the kitchen towel roll holder for supporting and rotating the kitchen towel roll, and is generally about 38 mm to 40 mm.

[0016] (Perforation) 1(a), kitchen towel 30 in the form of kitchen towel roll 100 may optionally have tear perforations 30m for facilitating separation of kitchen towel 30 from the roll portion when unwound from kitchen towel roll 100. Tear perforations 30m are generally formed by continuous small holes extending in the width direction (CD direction) of kitchen towel 30, and are provided at predetermined intervals L along the length direction (MD direction) of kitchen towel 30.

[0017] (Kitchen towel roll diameter) 1(b), in an embodiment of the present invention, the roll diameter DR of kitchen towel roll 100, which is the roll diameter of kitchen towel 30 wound into a roll, is set to a size that can be accommodated in a typical kitchen towel roll holder and supported rotatably. The roll diameter DR of kitchen towel roll 100 is, for example, 100 mm to 125 mm, and may be 110 mm to 120 mm.

[0018] The roll diameter DR can be determined by the following method. First, the circumference of kitchen towel roll 100 is measured using a tape measure at three positions, namely, both ends and the center in the axial direction of kitchen towel roll 100. Next, the measured circumference is divided by pi, 3.14, to calculate the roll diameter at each of the three positions, and the average of the roll diameters at the three positions is calculated. The calculated average is set as the roll diameter DR of kitchen towel roll 100.

[0019] (Kitchen towel roll length) In an embodiment of the present invention, the roll length of kitchen towel roll 100, which is the length of kitchen towel 30 wound around cardboard core 5, is preferably 9 m or more and 35 m or less. The roll length can be determined, for example, by actually measuring the length of kitchen towel 30 as it is unwound from kitchen towel roll 100. Alternatively, the roll length can be determined, for example, by calculation based on the settings of the equipment during production.

[0020] When the winding length of the kitchen towel roll 100 exceeds 35 m, the winding diameter of the kitchen towel roll 100 generally becomes large, and the kitchen towel roll 100 becomes difficult to fit into a general kitchen towel roll holder. In addition, if an attempt is made to keep the winding diameter within a suitable range without changing the winding length, the kitchen towel 30 will be wound tightly, which will make the embossing more likely to be crushed, reduce the paper thickness and bulkiness of the kitchen towel 30, narrow the gaps between the constituent sheets, and cause a decrease in the water absorption effect (water retention) and wiping ability of dirt, etc. In addition, the adhesive glue G used to bond the constituent sheets to each other is more likely to slip through (details will be described later), which will tend to reduce the yield.

[0021] Alternatively, in order to keep the roll diameter within a suitable range without changing the roll length, it may become necessary to make design changes such as limiting the basis weight of constituent sheets 12, 14, and 20 of kitchen towel 30. In such cases, it may become difficult to ensure a good feel and strength when used for draining water, draining oil, wiping off oil, wiping off dirt, etc.

[0022] If the roll length of the kitchen towel roll 100 is less than 9 m, the roll length will be shorter than that of typical commercially available products, and the cost performance in terms of storage and transportation as a kitchen towel product and its market competitiveness will be inferior.

[0023] (Kitchen towel roll density) The winding density of the kitchen towel roll 100 is calculated according to the following formula (I): (Winding density) = (Winding length × Number of sheets) ÷ (Roll cross-sectional area) (Equation I)

[0024] The cross-sectional area of ​​the roll, i.e., the cross-sectional area of ​​kitchen towel roll 100, corresponds to the area of ​​the portion of the end face of kitchen towel roll 100 shown in Figure 1 (b) that is made up of kitchen towel. In other words, the cross-sectional area of ​​the roll is the area of ​​a circle whose diameter is the winding diameter DR minus the area of ​​a circle whose diameter is the core diameter DC, which is the outer diameter of cardboard tube 5. The cross-sectional area of ​​the roll is calculated by the following formula (II). (Roll cross-sectional area) = (Kitchen towel roll diameter DR ÷ 2)2 × Pi - (Core diameter DC ÷ 2) 2 × Pi (Equation II)

[0025] For example, if kitchen towel roll 100 has a winding length of 11.5 m, a winding diameter DR of 116 mm, and a core diameter DC of paper tube 5 of 40 mm, the number of sheets in kitchen towel 30 is 3, and therefore, from equations I and II, the winding density is calculated as follows: (11.5 m×3)÷{(116 mm÷2) 2 ×Pi-(40mm÷2) 2 × pi}, which is 0.37m / cm 2 It becomes.

[0026] In an embodiment of the present invention, the winding density of the kitchen towel roll 100 is 0.30 m / cm 2 More than 0.90m / cm 2 less than or equal to 0.31 m / cm 2 More than 0.75m / cm 2 More preferably, it is 0.35 m / cm or less. 2 More than 0.69m / cm 2 The following is the result.

[0027] Generally speaking, the lower the winding density of the kitchen towel roll 100, the higher the water absorption effect (water retention). 2 By satisfying the following conditions, it is possible to prevent kitchen towel 30 from being tightly rolled and crushed in the thickness direction, which would cause the embossing to be easily crushed, thereby more effectively preventing a decrease in water absorption effect (water retention) and wiping ability of dirt, etc. Also, it is possible to prevent the adhesive glue G used for bonding the constituent sheets from coming off (described in detail later), making it difficult for the yield to decrease.

[0028] On the other hand, the winding density of 100 kitchen towel rolls is 0.30 m / cm 2 As a result, it is possible to improve the cost performance and market competitiveness of storage and transportation.

[0029] (Kitchen towels) FIG. 2 is a schematic diagram illustrating the configuration of a kitchen towel 30 according to an embodiment of the present invention. FIG. 2(a) is a schematic perspective view of a section (hereinafter, such one section is also referred to as one cut) between two adjacent perforations 30m in the longitudinal direction (MD) of the kitchen towel 30 unwound from the roll-shaped portion of the kitchen towel roll 100 in FIG. 1(a). FIG. 2(a) shows the surface (hereinafter, simply referred to as the outer surface of the kitchen towel roll 100) that is radially outward in the kitchen towel roll 100 in FIG. 1, among both sides of the kitchen towel 30. FIG. 2(b) is a schematic enlarged view of the portion indicated by the symbol IIb in FIG. 2(a). FIG. 2(c) is a schematic cross-sectional view taken along the line indicated by the symbol IIc-IIc in FIG. 2(b).

[0030] Referring to Fig. 2(c), kitchen towel 30 according to an embodiment of the present invention is a three-ply (so-called three-ply) kitchen towel formed by laminating three sheets 12, 14, and 20. Referring to Fig. 1(a) and Fig. 2(a) and (c), kitchen towel 30 is embossed over the entire surface (whole surface) on both sides.

[0031] Specifically, referring to (a) of Fig. 1 and (a) of Fig. 2, one surface of the kitchen towel 30 (the outer surface of the kitchen towel roll 100) has an embossed pattern formed of a large number of embossed recesses 10ed, which are approximately hexagonal in plan view, repeatedly formed with flat portions between them. Referring to (b) of Fig. 2, in this example, each embossed recess 10ed included in one embossed pattern has a dot-like shape that is approximately triangular in plan view. Referring to (c) of Fig. 1, this embossed pattern is integrally formed with two sheets 12 and 14 of the three sheets that make up the kitchen towel 30.

[0032] The shapes of the embossed pattern and the embossed portion are examples and do not limit the present invention. The embossed pattern may be a dotted pattern, a line pattern, or a combination of these patterns formed over substantially the entire surface of the sheet. The shape of the embossed portion may be any shape, such as a triangle, a circle, a square, a rectangle, a rhombus, a pentagon, other polygons, a flower shape, or any combination of these shapes.

[0033] 1(a) and 2(c), an embossed pattern consisting of a large number of embossed recesses 20ed and forming a fine dot pattern in plan view is uniformly and repeatedly formed over the entire surface of the other side of kitchen towel 30 (the inner surface of kitchen towel roll 100). In this example, each embossed recess 20ed included in one embossed pattern has a dot-like shape that is approximately a perfect circle in plan view. This embossed pattern is formed on the remaining sheet 20 of the three sheets that make up kitchen towel 30.

[0034] The shapes of the embossed pattern and the embossed portion are examples and do not limit the present invention. The embossed pattern may be a dotted pattern, a line pattern, or a combination of these patterns formed over substantially the entire surface of the sheet. The shape of the embossed portion may be any shape, such as a triangle, a circle, a square, a rectangle, a rhombus, a pentagon, other polygons, a flower shape, or any combination of these shapes.

[0035] 2(c), in the embodiment of the present invention, the embossed recesses 20ed formed in one sheet 20 of the three sheets constituting kitchen towel 30 described above are characterized by having a smaller area and a shallower depth than the embossed recesses 10ed formed integrally with two sheets 12, 14 of the three sheets constituting kitchen towel 30. Hereinafter, in this specification, the embossed recesses 20ed are also referred to as micro-embossed recesses 20ed. The areas and depths of the embossed recesses 10ed and the micro-embossed recesses 20ed will be described in detail later.

[0036] (Sheet) The sheets 12, 14, and 20 that are components of the kitchen towel 30 are obtained by papermaking a slurry that contains a pulp component, which is a fiber raw material.

[0037] (Pulp component) Pulp components include wood pulp, non-wood pulp, and waste paper pulp.

[0038] Examples of wood pulp produced using wood as a raw material include chemical pulps such as hardwood pulp (hardwood kraft pulp (LKP)), softwood pulp (softwood kraft pulp (NKP)), sulfite pulp (SP), dissolving pulp (DP), soda pulp (AP), unbleached kraft pulp (UKP), and oxygen bleached kraft pulp (OKP). Other examples include semi-chemical pulps such as semi-chemical pulp (SCP) and chemi-ground wood pulp (CGP), groundwood pulp (GP), and thermomechanical pulp (TMP, BCTMP), but are not limited thereto.

[0039] Non-wood pulps produced using plants or animals other than wood as raw materials include, but are not limited to, cotton pulps such as cotton linters and cotton lint, non-wood pulps such as hemp, wheat straw, and bagasse, and cellulose, chitin, and chitosan isolated from sea squirts and seaweed.

[0040] The waste paper pulp is pulp produced from waste paper, i.e., pulp that has been made into paper. Examples of waste paper pulp include, but are not limited to, so-called milk carton pulp made from paper cartons for filling and packaging liquids, and deinked pulp made from newspapers, magazines, etc.

[0041] The pulp component may be one of the above-mentioned types alone or a mixture of two or more types. The pulp components of sheets 12, 14, and 20 may be the same or different. These pulp components greatly affect the quality of kitchen towel 30, so they are appropriately blended in a predetermined type and blending ratio according to the required quality. For example, only wood pulp (100% by mass) may be used as the pulp component.

[0042] As the wood pulp, at least one selected from coniferous pulp and hardwood pulp can be preferably used. Coniferous pulp has long and strong fibers, and can impart strength to the sheet produced. Hardwood pulp has short and flexible fibers, and can provide uniformity, good texture, softness, and the like to the sheet produced. In an embodiment of the present invention, it is preferable to use coniferous pulp and hardwood pulp in combination, and it is more preferable to use coniferous kraft pulp (NKP) and hardwood kraft pulp (LKP) in combination.

[0043] (optional ingredient) Various chemicals may be added as optional components to the sheets 12, 14, and 20 in order to achieve the required quality and stabilize the operation. Examples of optional components include dry strength agents, wet strength agents, softeners, bulking agents, dyes, fragrances, dispersants, drainage improvers, pitch control agents, retention improvers, and sizing agents. Examples of dry strength agents include cationic starch, polyacrylamide (PAM), and carboxymethyl cellulose (CMC). Examples of wet strength agents include polyamide epichlorohydrin, urea, melamine, and thermally crosslinked polyacrylamide. Examples of softeners include anionic surfactants, nonionic surfactants, cationic surfactants, and zwitterionic surfactants. The optional components may be used alone or in combination of two or more. The optional components may be different between the sheets 12, 14, and 20.

[0044] (sheet basis weight) In an embodiment of the present invention, the basis weight of each of the three sheets 12, 14, and 20 constituting the kitchen towel 30 (i.e., per ply) is 10 g / m 2 More than 30g / m 2 or less, preferably 13 g / m 2 More than 25g / m 2 More preferably, it is 15 g / m or less. 2 More than 20g / m 2 The basis weights of the sheets need only be within the above range, and the sheets are not limited to being the same in basis weight, and may be different in basis weight.

[0045] The pulp component, which is the main component constituting the sheets 12, 14, and 20, generally has good water absorbency. When the basis weight of a sheet is low, the absolute amount of the pulp component contained in the sheet is also low, and as a result, the water absorbency of the sheet itself and the kitchen towel 30 including the sheet may be limited.

[0046] When the basis weight of the sheet increases, the thickness of the sheet also tends to increase accordingly. When a thick sheet is used, the thickness and bulk of the kitchen towel 30 (thickness and volume of the three plies including the embossing) increase, and when the kitchen towel roll 100 is made, it may not fit within the desired roll diameter DR. In this case, one method for fitting the kitchen towel 30 within the desired roll diameter DR is to reduce the thickness and bulk by calendering the sheet or increasing the winding tension during the manufacture of the kitchen towel roll. However, this method may cause the gaps and embossed shapes in and between the constituent sheets to be crushed, which may cause a decrease in the water absorption effect (water retention) and wiping ability of the kitchen towel 30, such as a decrease in the water absorption effect (water retention) and wiping ability of the kitchen towel 30. Another method for fitting the kitchen towel 30 within the desired roll diameter DR is to reduce the roll length. However, this method results in poor cost performance and market competitiveness in storage and transportation of the kitchen towel product.

[0047] Therefore, in the embodiment of the present invention, the basis weight (basis weight per ply) of each of the sheets 12, 14, 20 is preferably within the above-mentioned range.

[0048] The basis weight of the sheet (basis weight per ply) can be measured in accordance with the provisions of Japanese Industrial Standard JIS P8124.

[0049] (Single embossed bonded sheet) Referring to FIG. 2(c), two sheets 12 and 14 of three sheets 12, 14, and 20 of kitchen towel 30 have a so-called single embossed laminated structure, and constitute an integral laminated sheet (hereinafter also referred to as single embossed bonded sheet) 10. Single embossed bonded sheet 10 has embossed recesses 10ed on one side (in this embodiment, the side on the sheet 12 side) and embossed protrusions 10ep corresponding to the embossed recesses 10ed on the other side (in this embodiment, the side on the sheet 14 side). On the side having embossed recesses 10ed, embossed recesses 10ed are surrounded by non-embossed recesses 10ned. Also, on the side having embossed protrusions 10ep, embossed protrusions 10ep are surrounded by non-embossed protrusions 10nep.

[0050] (Single embossed) The single embossed laminated structure can be obtained by embossing a laminated sheet in which a predetermined number of sheets (in this embodiment, two sheets, sheets 12 and 14) are stacked, by pressing the convex portion of an embossing roll only from one side (in this embodiment, the side on the sheet 12 side) to form an embossed concave portion (in this embodiment, the embossed concave portion 10ed) on one of the two sides of the sheet to be embossed, and an embossed convex portion (in this embodiment, the embossed convex portion 10ep) formed by the back side of the embossed concave portion on the other side (in this embodiment, the side on the sheet 14 side). This processing is also called single embossing. According to the single embossing, the same pattern of embossed concave portions is imparted to the entirety of the multiple sheets (in this embodiment, two sheets, sheets 12 and 14) that constitute the laminated sheet.

[0051] (Temporary bond) In the single embossed bonded sheet 10, the constituent sheets 12 and 14 are integrated and bonded by being pressed simultaneously during single embossing. This bond can be easily released by applying a force to the constituent sheets 12 and 14 in a direction away from each other, and is hereinafter also referred to as a temporary bond.

[0052] (Micro embossed sheet) 2(c), the remaining sheet of the three sheets of the kitchen towel 30 is an embossed sheet (hereinafter referred to as a microembossed sheet) 20 having an embossed depression (hereinafter referred to as a microembossed depression) 20ed on one side over its entire surface, the depression being smaller in area and shallower in depth than the embossed depression 10ed of the single embossed bonded sheet 10, and an embossed protrusion (hereinafter referred to as a microembossed protrusion) 20ep corresponding to the microembossed depression 20ed on the other side. On the surface having the microembossed depression 20ed, the microembossed depression 20ed is surrounded by the non-microembossed depression 20ned. Also, on the surface having the microembossed protrusion 20ep, the microembossed protrusion 20ep is surrounded by the non-microembossed protrusion 20nep.

[0053] (Area and depth of embossed recess) In the embodiment of the present invention, the area of ​​the embossed recess 10ed of the single embossed bonding sheet 10 is 0.71 mm 2 Over 4.42mm 2 less than or equal to 1.20 mm, preferably 2 More than 3.40mm 2 The following is the result.

[0054] In the embodiment of the present invention, the depth of the embossed recesses 10ed of the single embossed bonded sheet 10 is 220 μm or more and 700 μm or less.

[0055] (Area and depth of microembossed recesses) In the embodiment of the present invention, the area of ​​the micro-embossed recess 20ed of the micro-embossed sheet 20 is smaller than the area of ​​the embossed recess 10ed of the single-embossed bonded sheet 10, and is 0.007 mm 2 More than 3.141mm 2 less than 0.011 mm, preferably 2 More than 1.767mm 2 The following is the result.

[0056] In the embodiment of the present invention, the depth of the micro-embossed recesses 20ed of the micro-embossed sheet 20 is shallower than the depth of the embossed recesses 10ed of the single-embossed bonded sheet 10, and is 20 μm or more and 130 μm or less.

[0057] (Method of measuring the area of ​​embossed recesses) The area of ​​the embossed recesses 10ed of the single embossed bonded sheet 10 can be measured by using a shape measuring laser microscope together with software for observing, measuring and analyzing images from the shape measuring laser microscope.

[0058] A shape measuring laser microscope uses a laser light source, which is a point light source, to scan the XY plane in the observation field of view, dividing it into multiple pixels, via an objective lens, and detects the reflected light from each pixel with a light receiving element. The objective lens is then driven in the height (Z-axis) direction, and the height information and reflected light amount are detected, with the Z-axis position with the highest reflected light amount as the focal point. By repeating the scan in this way, an ultra-deep light image and height image (information) that are in focus as a whole can be obtained. The laser light source is a pinhole confocal optical system, so the measurement precision is high.

[0059] As the shape measuring laser microscope, a one-shot 3D shape measuring instrument VR-3200 (manufactured by KEYENCE Corporation) can be used. As the observation, measurement, and image analysis software, the analysis application VR-H2A (manufactured by KEYENCE Corporation) can be used.

[0060] The area of ​​the embossed recess 10ed can be measured using the one-shot 3D shape measuring device VR-3200 and the analysis application VR-H2A according to a known method, for example, the method disclosed in Japanese Patent No. 6606147. The measurement conditions are a magnification of 12 times and a field area of ​​24 mm x 18 mm. The measurement magnification and field area may be appropriately changed depending on the desired size of the embossment.

[0061] The measurement method will be outlined with reference to Fig. 3. Fig. 3 is a diagram for explaining a method for measuring the area and depth of the embossed recess 10ed. Fig. 3(a) is a schematic diagram of the kitchen towel 30 viewed from the side of the single embossed bonded sheet 10, Fig. 3(b) is a schematic cross-sectional diagram of the single embossed bonded sheet 10, Fig. 3(c) is a schematic diagram of one embossed recess 10ed viewed from above, and Fig. 3(d) is a diagram showing an example of a cross-sectional curve of a height profile on an XY plane measured by a shape measuring laser microscope.

[0062] The area of ​​the embossed depressions 10ed is measured on the side of the single embossed bonded sheet 10 having the embossed depressions 10ed, out of both sides of the kitchen towel 30. The area of ​​the embossed depressions 10ed is measured for any 10 embossed depressions 10ed in the CD direction (width direction) of the kitchen towel 30, and the average value of the obtained measurements is regarded as the area per embossed depression 10ed.

[0063] 3(a), when selecting any 10 embossed recesses 10ed, any 10 recesses are selected from the embossed recesses 10ed located at a position indicated by a straight line M parallel to the CD direction of kitchen towel 30. The position of this straight line M is the center of the 20th cut of kitchen towel 30 counting from the outermost side of kitchen towel roll 100.

[0064] According to a height profile (not shown) on the XY plane obtained by a shape measuring laser microscope, the height of the surface of the kitchen towel 30 is expressed by shading. In the XY plane image (not shown), each embossed depression 10ed is shown as a dark colored portion. The shading of the color distinguishes between the embossed depressions 10ed and the non-embossed depressions 10ned.

[0065] 3(c) is a schematic diagram of one embossed depression 10ed viewed from above. In the figure, an embossed peripheral edge Erim indicates the boundary between the embossed depression 10ed and the non-embossed depression 10ned. The inside of the embossed peripheral edge Erim is the embossed depression 10ed. In this embodiment, the embossed depression 10ed has a substantially triangular shape when viewed from above.

[0066] The area of ​​the embossed recess 10ed is measured according to the following procedure. (1) The length of the line segment between the two most distant points of the periphery Erim of the embossed recess 10ed in the XY plane is defined as the length of the longest part a of the periphery Erim of the embossment. This length can be found as the distance on the XY plane between inflection points Z1 and Z2 in the cross-sectional curve of the height profile on the XY plane taken with a shape measuring laser microscope as shown in (d) of Figure 3. (2) Next, similarly, the length of the line segment between the two farthest points of the embossed peripheral edge Erim in the XY plane in a direction perpendicular to the longest part a is defined as the longest part b of the embossed peripheral edge Erim. (3) The area of ​​the embossed recess 10ed is calculated from the values ​​of the longest part a and the longest part b. Referring to (c) of Fig. 3, in this embodiment, the embossed recess 10ed has a substantially triangular shape in the XY plane, with the longest part a being the base of the triangle and the longest part b being the height of the triangle. Using the formula for the area of ​​a triangle, the product (a x b) of the longest part a and the longest part b is divided by 2 to calculate the area of ​​the embossed recess 10ed.

[0067] For calculating the area, a formula suitable for the shape of the embossed recess 10ed is used. For example, if the XY plane shape of the embossed recess 10ed is substantially circular, the average diameter d is calculated by averaging the values ​​of the longest part a and the longest part b, and the radius r is calculated by dividing the average diameter d by half of the value of the longest part a and the radius r. Then, the formula for the area of ​​a circle is used to calculate the average diameter d. 2 The value obtained by calculating the above is determined as the area of ​​the embossed recess 10ed.

[0068] Similarly, for example, when the XY plane shape of the embossed recess 10ed is substantially rectangular, the product (a×b) of the longest part a and the longest part b is calculated as the area of ​​the embossed recess 10ed.

[0069] (Method of measuring the depth of embossed recesses) The depth of the embossed recess 10ed of the single embossed bonding sheet 10 can be measured at the same time as the area is measured using the same shape measuring laser microscope and image observation / measurement / image analysis software used to measure the area of ​​the embossed recess 10ed.

[0070] With reference to (b) and (d) of FIG. 3, the embossing depth D is determined by measuring the height difference of the embossing using a shape measuring laser microscope.

[0071] The embossing depth analysis is carried out according to the following procedure. (1) The waviness of the entire field of view is removed from the target image by performing surface shape correction. (2) By measuring the line roughness, the roughness profile between two points on either side of the embossment to be measured is measured, and tilt correction is performed. (3) The embossing depths Z1 and Z2 at the embossing start point X1 and end point X2 are calculated from the data of the position X (μm) in the planar direction of the embossing and the embossing depth Z (μm) (see FIG. 3(d)). (4) The average value of emboss depth Z1 and Z2 is taken as the maximum emboss depth Z max The minimum value Z of the embossing depth located between the embossing start point X1 and the embossing end point X2 is min The difference between these is defined as the embossing depth ΔZ (see FIG. 3(d)). ΔZ=Z max -Z min (5) The above measurements (1) to (4) are carried out for any ten embossed recesses 10ed of kitchen towel 30, and the average value of ΔZ is regarded as emboss depth D.

[0072] (Method of measuring area and depth of microembossed recesses) The area and depth of the microembossed recesses 20ed of the microembossed sheet 20 can be measured in accordance with the method for measuring the area and depth of the embossed recesses 10ed of the single-embossed bonded sheet 10 described above.

[0073] (Double embossed) Referring again to FIG. 2(c), in the kitchen towel 30 according to an embodiment of the present invention, the single embossed bonded sheet 10 and the micro embossed sheet 20 have a so-called double embossed type laminated structure, and are laminated so that the embossed convex portion 10ep of the single embossed bonded sheet 10 faces the micro embossed sheet 20.

[0074] In the example shown in Fig. 2(c), the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated so that the embossed convex portion 10ep of the single embossed bonded sheet 10 faces the micro embossed convex portion 20ep of the micro embossed sheet 20. However, the configuration of the embodiment of the present invention is not limited to this. A configuration (not shown) in which the embossed convex portion 10ep of the single embossed bonded sheet 10 faces the micro embossed concave portion 20ed of the micro embossed sheet 20 also falls within the scope of the embodiment of the present invention.

[0075] The double embossed laminate structure can be obtained by separately embossing the base paper of each of the two sheets to be laminated, and then laminating the two embossed sheets (in this embodiment, the single embossed bonded sheet 10 and the micro embossed sheet 20). This process is also called double embossing. According to the double embossing, each of the embossed sheets (the single embossed bonded sheet 10 and the micro embossed sheet 20) constituting the double embossed laminate structure can have an embossing with a different pattern.

[0076] (adhesion) Referring to (c) of Figure 2, in a kitchen towel 30 according to an embodiment of the present invention, the single embossed bonded sheet 10 and the micro embossed sheet 20 are bonded via an adhesive glue G interposed between the embossed convex portion 10ep of the single embossed bonded sheet 10 and the micro embossed sheet 20.

[0077] (adhesive glue) A known adhesive used in kitchen towels having a laminated structure can be used as the adhesive paste G that bonds the single embossed bonded sheet 10 and the micro embossed sheet 20. For example, a cellulose-based adhesive such as polyvinyl alcohol (PVA), starch, modified starch, or carboxymethyl cellulose (CMC) can be used.

[0078] The adhesive glue G can be applied to the bonding sites of the single embossed bonded sheet 10 and / or the micro-embossed sheet 20 by a known device such as an applicator including an applicator roll, as described below with reference to Figure 4. Typically, the adhesive glue G is applied to one of the single embossed bonded sheet 10 and the micro-embossed sheet 20.

[0079] (This combination) When applying the adhesive paste G, if a low-viscosity adhesive paste G is used, the adhesive paste G applied to the surface of the sheet may seep into the sheet and seep out from the opposite surface of the sheet, which is called a glue run-out phenomenon. By utilizing this glue run-out phenomenon, in an embodiment of the present invention, low-viscosity adhesive paste G is applied to the embossed protrusions 10ep of the single-embossed bonded sheet 10, and is allowed to permeate from the sheet 14 side to the sheet 12 side, thereby strengthening the bond between the sheets 14 and 12 that constitute the single-embossed bonded sheet 10. In this specification, this bond is also referred to as a permanent bond, in contrast to the above-mentioned temporary bond.

[0080] The sheets 12 and 14 constituting the single embossed bonded sheet 10, which are integrated by temporary bonding, could easily be separated by applying force to the constituent sheets 12 and 14 in a direction that would move them away from each other. However, by using adhesive glue G in this permanent bond, the bond is strengthened and the two sheets are less likely to separate.

[0081] (Embossed convexity density) In this specification, the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 is an index showing the number of embossed protrusions 10ep contained per unit area of ​​the single embossed bonded sheet 10 (unit: pieces / cm 2 ).

[0082] The density of the embossed protrusions 10ep of the single embossed bonded sheet 10 can be determined by the following procedure. (1) Ten 8 cm x 8 cm areas are randomly selected on 30 kitchen towels, each 1 m long, from a kitchen towel roll of 100. (2) For the above 10 locations, the number of embossed recesses 10ed of the single embossed binding sheet 10 within the above range is assumed to be the number of embossed protrusions ep, and each is visually counted. At this time, only embosses that are entirely within the range are counted, and embosses that are only partially within the range are not counted. (3) The counted numbers for the above 10 locations are converted to per 1 cm × 1 cm to calculate the density of the embossed convex portions 10ep of the single embossed bonding sheet 10. The average value calculated from the densities of the embossed convex portions 10ep at the 10 locations is regarded as the density of the embossed convex portions 10ep of the single embossed bonding sheet 10.

[0083] In the embodiment of the present invention, the density of the embossed protrusions 10ep of the single embossed binding sheet 10 is 3 pieces / cm 2 More than 30 pieces / cm 2 The following is the result.

[0084] As described above, referring to (c) of Figure 2, in the kitchen towel 30 according to an embodiment of the present invention, the single embossed bonded sheet 10 and the micro embossed sheet 20 are bonded via adhesive glue G interposed between the embossed convex portion 10ep of the single embossed bonded sheet 10 and the micro embossed sheet 20.

[0085] Increasing the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 increases the number of adhesive contacts per unit area that contribute to the adhesion between the single embossed bonded sheet 10 and the micro embossed sheet 20. Increasing the number of adhesive contacts per unit area strengthens the adhesion between the sheets 10, 20, making it less likely that the single embossed bonded sheet 10 and the micro embossed sheet 20 will accidentally peel off when wiping off dirt or the like with the kitchen towel 30.

[0086] Incidentally, at the adhesive contact points between the single embossed bonded sheet 10 and the micro embossed sheet 20, the surfaces of the single embossed bonded sheet 10 and the micro embossed sheet 20 (such as the top surfaces of the embossed convex portions 10ep and the top surfaces of the micro embossed convex portions 20ep) are covered with the intervening adhesive glue G. In addition, a part of the adhesive glue G also partially penetrates into the inside of the sheets. In the regions of the sheets 10 and 20 to which the adhesive glue G is attached in this way, the presence of the adhesive glue G may inhibit water absorption and penetration.

[0087] If the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 becomes excessively high, the presence of the adhesive glue G will increase the areas of the sheets 10, 20 where water absorption and moisture penetration are inhibited, which may reduce the water absorption rate of the kitchen towel 30. Therefore, in an embodiment of the present invention, there is an upper limit to the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 in order for the kitchen towel 30 to exhibit an excellent water absorption effect.

[0088] When the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 is low, the embossed protrusions 10ep are sparsely present, reducing the number of adhesive contacts per unit area that contribute to the adhesion between the single embossed bonded sheet 10 and the micro embossed sheet 20. When the number of adhesive contacts per unit area becomes excessively small, the adhesion between the sheets 10, 20 becomes weak, and the single embossed bonded sheet 10 and the micro embossed sheet 20 are likely to peel off inadvertently when wiping off dirt and the like with the kitchen towel 30.

[0089] Furthermore, if the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 is excessively low, the embossed protrusions 10ep are sparsely present, which may result in an excessively large gap between the single embossed bonded sheet 10 and the micro embossed sheet 20. In that case, the kitchen towel 30 may not be able to retain absorbed water in the gaps between the single embossed bonded sheet 10 and the micro embossed sheet 20, and may not be able to exhibit excellent water retention.

[0090] Therefore, there is a suitable range for the density of the embossed protrusions 10ep of the single embossed bonded sheet 10. In the embodiment of the present invention, the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 is 3 pieces / cm 2 More than 30 pieces / cm 2 5 pieces / cm or less, preferably 5 pieces / cm 2 More than 25 pieces / cm 2 The following is the result.

[0091] (Ratio of the number of embossed convex portions 10ep of the single embossed binding sheet 10 to the number of micro embossed sheets 20) In this specification, the ratio of the number of embossed convex portions 10ep of the single embossed bonded sheet 10 adhered to the micro-embossed sheet 20 refers to the proportion of the number of embossed convex portions 10ep of the single embossed bonded sheet 10 that contribute to adhesion to the micro-embossed sheet 20 among the embossed convex portions 10ep of the single embossed bonded sheet 10 (unit: %).

[0092] The ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the number of embossed protrusions 10ep of the micro embossed sheet 20 can be obtained by the following procedure. (1) Ten 8 cm x 8 cm areas are randomly selected on 30 kitchen towels, each 1 m long, from a 100 kitchen towel roll. (2) For the above 10 locations, the number of embossed recesses 10ed of the single embossed binding sheet 10 within the above range is assumed to be the number of embossed protrusions 10ep, and each is visually counted. (3) While peeling the single embossed bonded sheet 10 from the micro embossed sheet 20, the number of embossed protrusions 10ep of the single embossed bonded sheet 10 bonded to the micro embossed sheet 20 in the same area at each of the 10 locations is counted. (4) The number of adhered portions counted for the above 10 locations is divided by the number of the above embossed convex portions 10ep to calculate the ratio of the number of adhered embossed convex portions 10ep of the single embossed bonded sheet 10 to the micro embossed sheet 20. The average value calculated from the obtained ratios for the 10 locations is regarded as the ratio of the number of adhered embossed convex portions 10ep of the single embossed bonded sheet 10 to the micro embossed sheet 20.

[0093] In an embodiment of the present invention, the ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the number of embossed protrusions 10ep of the micro embossed sheet 20 is 30% or more, preferably 40% or more, and more preferably 50% or more.

[0094] By setting the ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the micro embossed sheet 20 at 30% or more, the single embossed bonded sheet 10 and the micro embossed sheet 20 can be bonded at more adhesive contact points. As the number of adhesive contact points increases, the adhesion between the sheets 10, 20 becomes stronger, and the single embossed bonded sheet 10 and the micro embossed sheet 20 are less likely to accidentally peel off when wiping off dirt or the like with the kitchen towel 30.

[0095] (Action and effect) As a result of intensive research, the inventors have adopted a structure in which the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated and bonded in a double embossed laminate structure in the three-ply kitchen towel 30, and have set the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 to 3 pieces / cm 2 More than 30 pieces / cm 2 It has been found that by setting the ratio of the number of embossed convex portions 10ep of the single embossed bonding sheet 10 to the micro embossed sheet 20 to be 30% or more, it is possible to achieve excellent water absorption effect (water retention) without any inconvenience and to improve the ease of wiping off dirt, etc.

[0096] In detail, kitchen towel 30 of this embodiment has a double embossed laminated structure of single embossed bonded sheet 10 and micro embossed sheet 20, which provides large gaps between single embossed bonded sheet 10 and micro embossed sheet 20. Kitchen towel 30 of this embodiment can store absorbed moisture in these gaps, thereby exhibiting excellent water absorption effect (water retention).

[0097] Moreover, kitchen towel 30 of this embodiment employs micro-embossed sheet 20 on one side, and the surface has fine irregularities. Due to the texture on the surface on the micro-embossed sheet side, kitchen towel 30 of this embodiment can exhibit good scraping performance when wiping off dirt, etc.

[0098] In addition, in the kitchen towel 30 of this embodiment, the density of the embossed convex portions 10ep of the single embossed binding sheet 10 is set to 3 pieces / cm 2 More than 30 pieces / cm 2or less, and the ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the micro embossed sheet 20 is set to 30% or more, so that the single embossed bonded sheet 10 and the micro embossed sheet 20 are bonded at many contact points per unit area. Therefore, the kitchen towel 30 of this embodiment is less likely to have the inconvenience of the single embossed bonded sheet 10 and the micro embossed sheet 20 accidentally peeling off when wiping off dirt or the like.

[0099] Therefore, according to the kitchen towel 30 of the embodiment of the present invention, it is possible to provide a kitchen towel that can exhibit excellent water absorption (water retention) without any inconvenience and has improved wiping properties for removing dirt, etc.

[0100] (Example of a method for manufacturing a kitchen towel according to an embodiment of the present invention) An example of a manufacturing method for producing the roll-shaped kitchen towel 30 (kitchen towel roll 100) according to the embodiment of the present invention will be described.

[0101] (Manufacture of raw rolls) First, the sheets 12, 14, and 20 that are the components of the kitchen towel 30 are wound into rolls to produce raw cloth rolls. In detail, using a papermaking machine (not shown), wide (several times to twenty-odd times the width of the kitchen towel roll 100) and long sheets 12, 14, and 20 are made from a papermaking slurry (paper material) and wound up, to produce single-ply raw cloth rolls with the sheets 12, 14, and 20 wound up.

[0102] As the papermaking machine, for example, a known papermaking machine such as a twin wire former type, a cylinder former type, a suction pressed former type, or a crescent former type can be used.

[0103] The papermaking machine may be equipped with a creping section that performs creping. In the creping section, during the drying of the sheet (web) to be made in the raw roll manufacturing process, a creping doctor can give the sheet very fine wavy wrinkles called crepes as necessary. Creping can give the sheet softness, bulkiness (bulk feeling), moisture absorbency, aesthetic appearance (crepe shape), and good touch.

[0104] The papermaking machine may also include a calendar section. In the calendar section, the dried sheet may be subjected to a calendaring process, in which the sheet is sandwiched and pressed from above and below by a pair of calendar rolls, as necessary. This compresses the sheets 12, 14, 20, adjusting and equalizing the paper thickness, and smoothing the surface. The calendaring section may be provided separately from the papermaking machine, and the calendaring process may be performed in any manufacturing process after the raw roll manufacturing process. The calendaring process may be performed in multiple stages.

[0105] (Kitchen towel manufacturing) FIG. 4 is a diagram showing an example of a manufacturing facility that can be used to manufacture kitchen towel 30, and in particular is a partial schematic diagram showing an example of an embossed laminate structure forming section.

[0106] In the manufacturing apparatus shown in Fig. 4, the embossing rolls 44, 45 are rolls having uneven portions on their outer circumferential surfaces corresponding to a desired embossing pattern. The uneven portions corresponding to the desired embossing pattern are formed on the outer circumferential surfaces of the embossing rolls 44, 45. At least the uneven portions of the embossing rolls 44, 45 are made of metal, and the embossing rolls 44, 45 may be male (convex) steel rolls. The embossing rolls 44, 45 are rotated by a driving means (not shown).

[0107] The nip rolls 43 and 46 are driven rolls that are used in contact with the embossing rolls 44 and 45, and have a cylindrical outer shape. The surface portions of the nip rolls 43 and 46 are formed of a hard rubber-like elastic body such as an elastically deformable hard synthetic rubber.

[0108] The above-mentioned sheets 12 and 14 are unwound from their respective original rolls (not shown), and are laminated via a roll (not shown) for overlapping, and are transported to an embossed laminate structure forming section shown in FIG. 4 as a laminated sheet 10.

[0109] 4, laminated sheet 10 consisting of sheets 12 and 14 is wrapped around nip roll 46 and passed through the nip between nip roll 46 and embossing roll 45, where it is pressed and embossed according to the shape of the uneven portion on the outer circumferential surface of embossing roll 45, to form single embossed bonded sheet 10. At this time, laminated sheet 10 is passed so that the surface of sheet 12 contacts embossing roll 45 and the surface of sheet 14 contacts nip roll 46, as shown in FIG.

[0110] Meanwhile, sheet 20 unwound from a roll of original sheet 20 (not shown) is wound around nip roll 43, passed through the nip between nip roll 43 and embossing roll 44, and pressed, so that an embossment is imparted that conforms to the shape of the uneven portions on the outer peripheral surface of embossing roll 44, thereby becoming micro-embossed sheet 20.

[0111] Next, adhesive paste G is applied to the top surface of the embossed convex portion of the embossed laminated sheet 10 (i.e., the top surface of the embossed convex portion 10ep of the single embossed bonded sheet 10, as shown in FIG. 2(c)) by an applicator including a glue pan 51, a fountain roll 48, a transfer roll 49, and an applicator roll 50. In detail, the liquid adhesive paste G stored in the glue pan 51 adheres to the surface of the rotating fountain roll 48 and is picked up, transferred to the transfer roll 49 and the applicator roll 50 in that order, and then transferred to the top surface of the embossed convex portion (the surface on the sheet 14 side) of the surface of the laminated sheet 10 passed between the applicator roll 50 and the embossing roll 45, which is the area in contact with the applicator roll 50.

[0112] Next, the embossed sheet 20 (micro-embossed sheet 20) and the laminated sheet 10 (single-embossed bonded sheet 10) to which adhesive paste G has been applied are passed through the nip between embossing rolls 44 and 45, and then wrapped around marriage roll 47. As a result, the single-embossed bonded sheet 10 and the micro-embossed sheet 20 are bonded and integrated via adhesive paste G, forming a kitchen towel 30 having a double-embossed laminated structure.

[0113] The kitchen towel 30 is fed downstream while the tension is adjusted by the dancer roll 52, and optionally, a tear perforation is formed by a perforation forming section (not shown).

[0114] The perforation forming unit is, simply put, a unit that forms perforations in a sheet that has been fed in. The perforation forming unit is configured to be capable of forming tear perforations 30m that traverse kitchen towel 30 in the width direction (CD direction) at regular intervals L along the longitudinal direction (MD direction) of kitchen towel 30. Any known perforation forming means can be used to form tear perforations 30m.

[0115] Kitchen towel 30 is then sent to a winding section (not shown) and wound into a roll around paper tube 5. Kitchen towel 30 wound into a roll is cut to a width dimension corresponding to the product size, and kitchen towel roll 100 is obtained.

[0116] The above-described manufacturing apparatus and manufacturing method are for illustrative purposes only and are not intended to limit the present invention. Any known manufacturing apparatus and manufacturing method can be used to manufacture the kitchen towel and kitchen towel roll of the present invention.

[0117] For example, in the above example, the manufacturing apparatus shown in Fig. 4 has been described as unwinding sheets from respective original rolls for sheets 12, 14, and 20. However, for sheets 12 and 14, instead of the two original rolls, a single original roll of laminated sheet 10 formed by overlapping sheets 12 and 14 may be prepared in advance, and laminated sheet 10 may be unwound from the single original roll.

[0118] Furthermore, in the above example, the manufacture of a raw cloth roll is also described as a method for manufacturing kitchen towel 30. However, the raw cloth roll may be obtained by purchase or the like, and the manufacturing process of the raw cloth roll is not an essential step in the manufacturing method of kitchen towel 30 according to the embodiment of the present invention.

[0119] In the above example, the adhesive paste G is applied by the applicator to the single embossed bonded sheet 10. However, the adhesive paste G may be applied to the micro embossed sheet 20 instead of the single embossed bonded sheet 10. This can be realized by arranging the applicator roll 50 in the manufacturing equipment so that it can come into contact with the embossing roll 44 for the micro embossed sheet 20 instead of the embossing roll 45 for the single embossed bonded sheet, and passing the base paper sheet of the micro embossed sheet 20 between the nip.

[0120] In the above example, the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated so that the embossed convex portion 10ep and the micro embossed convex portion 20ep of each sheet face each other. However, in the embodiment of the present invention, it is sufficient that the embossed concave portion 10ed of the single embossed bonded sheet 10 is disposed on the front side of the kitchen towel 30. That is, the present invention also includes a configuration in which the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated so that the embossed convex portion 10ep and the micro embossed concave portion 20ed of each sheet face each other. This configuration can be realized by separating the set of the embossing roll (steel roll) 45 and the nip roll (rubber roll) 46 for the single embossed bonded sheet 10 from the set of the embossing roll (steel roll) 44 and the nip roll (rubber roll) 43 for the micro embossed sheet 20 in the manufacturing equipment, and rearranging the roll sets so that the sheets can be laminated so that the embossed convex portion 10ep and the micro embossed concave portion 20ed face each other.

[0121] Also, in the above example, there is no description of the orientation of the front and back sides when kitchen towel 30 is wound around paper tube 5 in the winding section. In the example of Fig. 1, kitchen towel roll 100 is wound so that single embossed bond sheet 10 is on the outer surface side and micro embossed sheet 20 is on the inner surface side of kitchen towel roll 100, but a configuration in which the front and back sides are reversed is also within the scope of the present invention.

[0122] (Means of achievement) (i) The area and depth of the embossed depressions 10ed of the single embossed bonded sheet 10, (ii) the area and depth of the embossed depressions 20ed of the micro-embossed sheet 20, (iii) the density of the embossed protrusions 10ep of the single embossed bonded sheet 10, and (iv) the ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the micro-embossed sheet 20 can be adjusted, for example, by the embossing conditions (shape, number, arrangement, embossing height, density, hardness and pressure of the embossing roll, combination of uneven shapes on the outer peripheral surface of the embossing roll, etc.) in the embossed laminate structure forming section of the manufacturing apparatus shown in FIG. 4.

[0123] In particular, the "ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the number of embossed protrusions 10ep of the micro embossed sheet 20" in the above item (iv) can be adjusted, for example, as follows.

[0124] 2(c), it appears that all of the embossed protrusions 10ep contribute to the adhesion between the sheets 10 and 20. In the case of such a configuration, the ratio of the number of adhered embossed protrusions 10ep is 100%.

[0125] Here, in the embodiment of the present invention, as long as the numerical requirements related to (i) to (iv) above are satisfied, the shapes and dimensions of the multiple embossed portions of the single embossed bonded sheet 10 may be different from one another, and the shapes and dimensions of the multiple embossed portions of the micro embossed sheet 20 may be different from one another. Therefore, for example, by providing multiple "embossing heights" of the embossing roll among the embossing processing conditions in the embossed laminated structure forming section in Fig. 4, the depths of the multiple embossed recesses 10ed are made different from one another, and the protruding heights of the corresponding embossed protrusions 10ep are made different from one another, thereby changing the ratio of the numbers of the embossed protrusions 10ep that are bonded.

[0126] As described above, in the manufacturing apparatus exemplified in Fig. 4, the adhesive paste G is applied to the top surfaces of the embossed protrusions 10ep of the single embossed bonded sheet 10 by transfer using the applicator roll 50. By making the protruding heights of the multiple embossed protrusions 10ep different from one another, some of the multiple embossed protrusions 10ep can be embossed protrusions 10ep whose top surfaces do not come into contact with the applicator roll 50. This reduces the number of embossed protrusions 10ep that can contribute to the adhesion between the sheets 10 and 20, and the ratio of the number of adhered embossed protrusions 10ep can be set to less than 100%.

[0127] Here, when other conditions are the same, generally speaking, the higher the ratio of the number of embossed protrusions 10ep of the single embossed bonded sheet 10 to the micro embossed sheet 20, the denser and stronger the bond between the single embossed bonded sheet 10 and the micro embossed sheet 20. Therefore, the single embossed bonded sheet 10 and the micro embossed sheet 20 are less likely to accidentally peel off when wiping off dirt or the like.

[0128] On the other hand, when other conditions are the same, generally speaking, the lower the ratio of the number of bonded embossed protrusions 10ep, the larger the gap between the single embossed bonded sheet 10 and the micro embossed sheet 20, and the better the water absorption effect (water retention). On the other hand, the lower the ratio of the number of bonded embossed protrusions 10ep, the looser the adhesion between the single embossed bonded sheet 10 and the micro embossed sheet 20, and the weaker the adhesion tends to be.

[0129] If the ratio of the number of embossed protrusions 10ep attached is high and the adhesion between the single embossed bonded sheet 10 and the micro embossed sheet 20 becomes too dense, there may be a concern that the presence of the adhesive glue G involved in the adhesion will hinder water absorption and water penetration, thereby reducing the water permeability and water absorbency of the kitchen towel 30. However, in the embodiment of the present invention, when the density of the embossed protrusions 10ep of the single embossed bonded sheet 10 is 3 to 30 pieces / cm 2Therefore, even if the ratio of the number of embossed protrusions 10ep attached is 100%, kitchen towel 30 has a sufficient flat sheet area within a given unit area that is not covered with adhesive paste G and does not impede water absorption or water penetration, and can exhibit excellent water absorption effect (water retention).

[0130] In this manner, in an embodiment of the present invention, the density of the embossed convex portions 10ep of the single embossed bonded sheet 10 and the ratio of the number of embossed convex portions 10ep of the single embossed bonded sheet 10 adhered to the micro embossed sheet 20 can be set based on the embossing processing conditions, etc., in accordance with the desired effects from the standpoint of water absorption effect (water retention) and the ability to wipe off dirt, etc.

[0131] <Second embodiment> Next, a second embodiment of the present invention will be described. Unless otherwise specified, the configuration applicable to the first embodiment is also applicable to this embodiment.

[0132] The second embodiment of the present invention is a preferred embodiment of the first embodiment, and is different from the first embodiment in that the density of the micro-embossed convex portions 20ep of the micro-embossed sheet 20 is 20 pieces / cm 2 More than 70 pieces / cm 2 The kitchen towel is characterized by the following:

[0133] (Micro-embossed convexity density) In this specification, the density of the micro-embossed convex portions 20ep of the micro-embossed sheet 20 is an index showing the number of the micro-embossed convex portions 20ep contained per unit area of ​​the micro-embossed sheet 20 (unit: pieces / cm 2 ).

[0134] The density of the micro-embossed convex portions 20ep of the micro-embossed sheet 20 can be determined in a manner similar to that for determining the density of the embossed convex portions 10ep of the single-embossed bonded sheet 10 described above.

[0135] (Action and effect) As described above for the first embodiment, the kitchen towel 30 according to an embodiment of the present invention includes both a first form (see (c) of Figure 2) in which the micro-embossed convex portion 20ep of the micro-embossed sheet 20 faces the embossed convex portion 10ep of the single-embossed bonded sheet 10, and a second form (not shown) in which the micro-embossed concave portion 20ed of the micro-embossed sheet 20 faces the embossed convex portion 10ep of the single-embossed bonded sheet 10.

[0136] (First aspect) In the first embodiment, the other surface of the kitchen towel 30 (the inner surface of the kitchen towel roll 100) has the micro-embossed recesses 20ed of the micro-embossed sheet 20. In this embodiment, the density of the micro-embossed protrusions 20ep is 20 pieces / cm 2 More than 70 pieces / cm 2 The density of the corresponding micro-embossed recesses 20ed is also 20 pieces / cm 2 More than 70 pieces / cm 2 The result is as follows.

[0137] As described above for the first embodiment, in the embodiment of the present invention, the area of ​​the micro-embossed recesses 20ed of the micro-embossed sheet 20 is smaller than the area of ​​the embossed recesses 10ed of the single-embossed bonded sheet 10 and is less than 0.007 mm 2 More than 3.141mm 2 less than 0.011 mm, preferably 2 More than 1.767mm 2 In the embodiment of the present invention, the depth of the micro-embossed recesses 20ed of the micro-embossed sheet is shallower than the depth of the embossed recesses 10ed of the single-embossed bonded sheet 10, and is 20 μm or more and 130 μm or less.

[0138] When the area and depth of the micro-embossed recesses 20ed are such values, the density of the micro-embossed recesses 20ed is 20 pieces / cm 2 More than 70 pieces / cm 2When the above is true, a fine dot pattern is formed on the surface of the kitchen towel 30 facing the micro-embossed sheet 20, which is made up of micro-embossed recesses 20ed having a certain depth and non-micro-embossed recesses 20ned that surround the recesses and form relatively convex portions. When wiping off dirt or the like with the kitchen towel 30, the uneven shape that forms this fine dot pattern allows the dirt or the like to be wiped off effectively.

[0139] (Second aspect) In the second embodiment, the other surface of the kitchen towel 30 (the inner surface of the kitchen towel roll 100) has the micro-embossed projections ep of the micro-embossed sheet 20. In this embodiment, the density of the micro-embossed projections 20ep is 20 pcs / cm 2 More than 70 pieces / cm 2 The following is the result.

[0140] As described above for the first embodiment, in the embodiment of the present invention, the area of ​​the micro-embossed recesses 20ed of the micro-embossed sheet 20 is smaller than the area of ​​the embossed recesses 10ed of the single-embossed bonded sheet 10 and is less than 0.007 mm 2 More than 3.141mm 2 less than 0.011 mm, preferably 2 More than 1.767mm 2 In the embodiment of the present invention, the depth of the micro-embossed recesses 20ed of the micro-embossed sheet is shallower than the depth of the embossed recesses 10ed of the single-embossed bonded sheet 10, and is 20 μm or more and 130 μm or less.

[0141] On the surface of the micro-embossed sheet 20 having the micro-embossed projections 20ep, micro-embossed projections 20ep having sizes and heights corresponding to the micro-embossed recesses 20ed are formed.

[0142] When the size and height of the micro-embossed convex portion 20ep are such values, the density of the micro-embossed convex portion 20ep is 20 pieces / cm 2 More than 70 pieces / cm2 When the height is less than this, a fine dot pattern is formed on the surface of kitchen towel 30 facing micro-embossed sheet 20 by micro-embossed protrusions 20ep having a certain height and non-micro-embossed protrusions 20nep surrounding them and forming relatively recessed portions. When wiping off dirt or the like with kitchen towel 30, the uneven shape forming this fine dot pattern makes it possible to effectively wipe off the dirt or the like.

[0143] In the first embodiment, the non-microembossed recesses 20ned of the microembossed sheet 20 that appear as relative protrusions on the other side of the kitchen towel 30 (the inner surface of the kitchen towel roll 100) are flat portions formed in contact with an embossing roll (steel roll) during the manufacturing process. On the other hand, in the second embodiment, the microembossed protrusions 20ep of the microembossed sheet 20 that appear as relative protrusions on the other side of the kitchen towel 30 (the inner surface of the kitchen towel roll 100) are protrusions that protrude from the non-microembossed protrusions 20nep that serve as the reference surface and are formed in contact with a nip roll (rubber roll) in the manufacturing process in correspondence with the microembossed recesses 20ed on the back surface. As a result, the kitchen towel 30 of the second embodiment tends to have better dirt scraping performance utilizing the texture of the kitchen towel than the kitchen towel 30 of the first embodiment.

[0144] The higher the density of the microembossed projections 20ep (or the microembossed recesses 20ed), the denser the distribution of projections and recesses on the surface, and generally, the more adhesive contact points between the microembossed sheet 20 and the single embossed bonded sheet 10 tend to increase. 2 When the density of the micro-embossed projections 20ep (or the micro-embossed recesses 20ed) is 70 pieces / cm or more, the effect of improving the ease of wiping off dirt and the like is large due to the dense distribution of the surface irregularities. 2If the thickness is below this value, it is possible to suppress the phenomenon that the kitchen towel 30 becomes hard or the water absorption and water retention of the kitchen towel 30 is inhibited due to the influence of the adhesive glue G present at the adhesive contact points between the micro-embossed sheet 20 and the single-embossed bonded sheet 10 when the adhesive contact points are excessively increased.

[0145] In this manner, in this embodiment, the density of the micro-embossed convex portions 20ep of the micro-embossed sheet 20 is 20 pieces / cm 2 More than 70 pieces / cm 2 ≦30 / cm 2 More than 60 pieces / cm 2 The following is the result.

[0146] <Third embodiment> Next, a third embodiment of the present invention will be described. Unless otherwise specified, the configurations applicable to the first and second embodiments are also applicable to this embodiment.

[0147] The third embodiment of the present invention is a preferred aspect of the first and second embodiments, (i) the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated such that the embossed convex portions 10ep of the single embossed bonded sheet 10 face the micro embossed convex portions 20ep of the micro embossed sheet 20; and (ii) the embossed convex portions 10ep of the single embossed binding sheet 10 and the micro-embossed convex portions 20ep of the micro-embossed sheet 20 are bonded to each other via an adhesive G interposed between the embossed convex portions 10ep of the single embossed binding sheet 10 and the micro-embossed convex portions 20ep of the micro-embossed sheet 20; It is characterized by:

[0148] (Action and effect) First, the above requirement (i) will be described. In the above first and second embodiments, it has been described that the scope of the present invention includes both "a configuration in which the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated so that the embossed convex portion 10ep of the single embossed bonded sheet 10 and the micro embossed convex portion 20ep of the micro embossed sheet 20 face each other" (first configuration) and "a configuration in which the single embossed bonded sheet 10 and the micro embossed sheet 20 are laminated so that the embossed convex portion 10ep of the single embossed bonded sheet 10 and the micro embossed concave portion 20ed of the micro embossed sheet 20 face each other" (second configuration).

[0149] In contrast, in the third embodiment, the lamination structure of the single embossed bonded sheet 10 and the micro-embossed sheet 20 is limited to the above-mentioned first structure. The surface of the micro-embossed sheet 20 having the micro-embossed recesses 20ed is the surface that comes into contact with the embossing roll (steel roll) 44 in the manufacturing process. The non-micro-embossed recesses 20ned surrounding the micro-embossed recesses 20ed can be said to be relative convex portions compared to the micro-embossed recesses 20ed, but they constitute a substantially flat surface.

[0150] On the other hand, the surface of the micro-embossed sheet 20 having the micro-embossed convex portions 20ep is a surface formed in the manufacturing process by contacting a nip roll (rubber roll) in correspondence with the micro-embossed concave portions 20ed on the back surface. That is, the micro-embossed convex portions 20ep protrude to one side with respect to a reference surface formed by the non-micro-embossed convex portions 20nep surrounding the micro-embossed convex portions 20ep.

[0151] Therefore, when the "configuration in which the single embossed bonding sheet 10 and the micro embossed bonding sheet 20 are laminated so that the embossed convex portion 10ep of the single embossed bonding sheet 10 and the micro embossed convex portion 20ep of the micro embossed sheet 20 face each other" (first configuration) is used, a larger gap can be formed between the single embossed bonding sheet 10 and the micro embossed sheet 20 by the amount of the micro embossed convex portion 20ep protruding from the reference plane than when the "configuration in which the single embossed bonding sheet 10 and the micro embossed sheet 20 are laminated so that the embossed convex portion 10ep of the single embossed bonding sheet 10 and the micro embossed concave portion 20ed of the micro embossed sheet 20 face each other" (second configuration).

[0152] Next, we will explain the above requirement (ii) "The single embossed bonded sheet 10 and the micro embossed sheet 20 are bonded via an adhesive glue G interposed between the embossed convex portions 10ep of the single embossed bonded sheet 10 and the micro embossed convex portions 20ep of the micro embossed sheet 20."

[0153] The orientation of the single embossed bonded sheet 10 and the micro embossed sheet 20 laminated to each other as stipulated in requirement (ii) is satisfied by satisfying requirement (i) above. Requirement (ii) further stipulates that the sheets 10 and 20 are bonded to each other via an adhesive glue G interposed between the embossed convex portion 10ep and the micro embossed convex portion 20ep.

[0154] In a configuration in which the single embossed bonding sheet 10 and the micro embossed bonding sheet 20 are laminated so that the embossed convex portions 10ep of the single embossed bonding sheet 10 and the micro embossed convex portions 20ep of the micro embossed bonding sheet 20 face each other (requirement (i) above), the embossed convex portions 10ep and the micro embossed convex portions 20ep are portions that protrude toward each other, so that the single embossed bonding sheet 10 and the micro embossed bonding sheet 20 are bonded together with an adhesive glue G interposed between these portions, whereby the single embossed bonding sheet 10 and the micro embossed bonding sheet 20 can be bonded together so that the gap between them is maximized.

[0155] (Means of achievement) The orientation of the sheets to be stacked can be changed by modifying the manufacturing equipment as described in the first embodiment.

[0156] 4, the adhesive paste G can be selectively applied to the top surface of the embossed convex portion 10ep of the single embossed bonded sheet 10 and / or the top surface of the micro-embossed convex portion 20ep of the micro-embossed sheet 20 by an applicator including a glue pan 51, a fountain roll 48, a transfer roll 49, and an applicator roll 50. Note that the manufacturing equipment and manufacturing method usable in this embodiment are not limited to this, and any other manufacturing equipment and manufacturing method known in the technical field can be used to apply the adhesive paste G.

[0157] <Fourth embodiment> Next, a fourth embodiment of the present invention will be described. Unless otherwise specified, the configurations applicable to the above embodiments are also applicable to this embodiment.

[0158] The fourth embodiment of the present invention is a preferred embodiment of the above-mentioned embodiment. The kitchen towel 30 of the fourth embodiment is characterized in that no adhesive paste G is interposed between the non-embossed convex portion 10nep of the single embossed bonded sheet 10 and the micro-embossed sheet 20.

[0159] The configuration of this embodiment will be described with reference to (c) of Fig. 2. The single embossed bonded sheet 10 according to this embodiment has an embossed convex portion 10ep on one surface, and also has a non-embossed convex portion 10nep on the same surface so as to surround the embossed convex portion 10ep.

[0160] The single embossed bonded sheet 10 and the micro embossed sheet 20 are bonded together via an adhesive glue G interposed between the top surface portion of the embossed convex portion 10ep of the single embossed bonded sheet 10 and the corresponding area of ​​the micro embossed sheet.

[0161] On the other hand, the non-embossed convex portion 10nep of the single embossed bonded sheet 10 is a relative concave portion, and a large gap is formed between the non-embossed convex portion 10nep of the single embossed bonded sheet 10 and the corresponding area of ​​the micro-embossed sheet, and the two sheets are not in contact.

[0162] (Action and effect) In an embodiment of the present invention, a large gap capable of storing absorbed water is provided between the non-embossed convex portion 10nep of the single embossed bonding sheet 10 and the corresponding area of ​​the micro-embossed sheet, thereby making it possible to exhibit excellent water absorption effect (water retention).

[0163] Depending on the portion and amount of adhesive G applied, it may inhibit water absorption or water penetration in the portion of the sheet to which the adhesive G is applied, or harden the sheet itself, thereby inhibiting the water absorption rate of the kitchen towel 30. In the fourth embodiment of the present invention, by adopting a configuration in which the adhesive G is not interposed between the non-embossed convex portion 10nep of the single embossed bonded sheet 10 and the micro-embossed sheet 20, it is possible to suppress as much as possible the phenomenon in which the adhesive G inhibits the water absorption rate of the kitchen towel 30.

[0164] (others) In the above embodiment, a kitchen towel roll 100, which is a roll-type kitchen towel in which the kitchen towel 30 is wound into a roll, has been exemplified (see FIG. 1). However, the present invention is also applicable to a kitchen towel box, which is a box-type kitchen towel in which a plurality of sheet-like kitchen towels 30 are folded and enclosed in a box, and a kitchen towel soft pack, which is a so-called soft pack type kitchen towel wrapped in film (not shown).

[0165] (Effects when applied to kitchen towel rolls) In the above embodiment, the kitchen towel 30 of the present invention has been described in the form of a kitchen towel roll 100 with reference to FIG.

[0166] Kitchen towel 30 according to an embodiment of the present invention employs a laminated structure of single embossed bonded sheet 10 consisting of two sheets integrally embossed as described above, and micro-embossed sheet 20 having embossments with a relatively small area and depth. Due to the configuration of kitchen towel 30 according to this embodiment, the structure allows it to exhibit excellent water absorption (water retention) without significantly increasing the paper thickness of kitchen towel 30 (3 ply), and it is possible to suppress an increase in the roll diameter of kitchen towel roll 100 while exhibiting excellent water absorption (water retention).

[0167] (Thickness of kitchen towel paper) The paper thickness (3 ply) of kitchen towel 30 according to the embodiment of the present invention is not particularly limited, but is, for example, 400 μm to 1000 μm as a reference value.

[0168] If the paper thickness falls within this range, it will be possible to sufficiently exhibit the thickness, strength, and water absorption effect (water retention) when used as a kitchen towel, without becoming excessively bulky, and the desired winding diameter and winding length of the kitchen towel roll 100 will be ensured.

[0169] (How to measure the thickness of kitchen towels) In this specification, the paper thickness of kitchen towel 30 refers to the thickness of one set of kitchen towels, and refers to the overall thickness of the three embossed sheets 12, 14, 20 bonded together with the intervening adhesive G. The paper thickness of kitchen towel 30 can be determined, for example, in accordance with ISO 12625-3, by measuring the thickness of kitchen towel 30 sandwiched between two parallel circular pressure surfaces of a micrometer. However, the pressure applied between the pressure surfaces during thickness measurement is 2 kPa±0.2 kPa.

[0170] (Kitchen towel box) As described above, the kitchen towel 30 according to the embodiment of the present invention can be applied not only to the kitchen towel roll 100 but also to the form of a kitchen towel box (not shown).

[0171] One example of a kitchen towel box (not shown) to which the present invention can be applied is a so-called pop-up type kitchen towel box in which a bundle of multiple kitchen towels 30 is stored in a storage box in a folded and stacked state so that one or several pieces can be taken out from a take-out opening. In detail, each kitchen towel 30 is folded in half so that the embossed recesses 10ed of the single embossed bonded sheet 10 are formed on one side and the micro-embossed recesses 20ed of the micro-embossed sheet 20 are formed on the other side, and the multiple kitchen towels 30 are stored in a stacked state with the halves sandwiched alternately. When one end side of the folded kitchen towel 30 is exposed to the outside from the take-out opening and then the entirety is pulled out, the sandwiched end side of the following kitchen towel 30 is exposed to the outside from the take-out opening.

[0172] Another example of a kitchen towel box (not shown) to which the present invention can be applied is the above-mentioned kitchen towel box, characterized in that the removal opening opens onto one side of the storage box in the form of a slit that intersects with the removal direction of the kitchen towels 30.

[0173] (Effect of the invention when applied to kitchen towel boxes) When the kitchen towel 30 according to the embodiment of the present invention is applied to a kitchen towel box, it is possible to suppress an increase in the height of the box while exhibiting the excellent water absorption effect (water retention) described above. In addition, due to the difference in the embossing properties imparted to the single embossed bonded sheet 10 and the micro-embossed sheet 20 constituting the kitchen towel 30, the kitchen towel is easy to fold when the micro-embossed sheet 20 having the embossed recesses with relatively small area and depth is folded on the inside.

[0174] The scope of the present invention is not limited to the exemplary embodiments shown and described, but includes all embodiments that achieve equivalent effects to those intended by the present invention. Moreover, the scope of the present invention is not limited to the combination of inventive features defined by each claim, but may be defined by any desired combination of specific features among all the respective disclosed features. [Explanation of symbols]

[0175] 5 Paper tube 10 Single embossed bond sheet 10ed embossed recess 10ep embossed convex part 10ned non-embossed recess 10nep Non-embossed convex part 12 sheets 14 sheets 20 Micro embossed sheet 20ed Micro embossed recess 20ep Micro embossed convex part 20ned non-micro embossed recess 20nep Non-microembossed convex part 30 Kitchen towels 30m perforation for breaking 43 Nip roll (rubber roll) 44 Embossing roll (steel roll) 45 Embossing roll (steel roll) 46 Nip roll (rubber roll) 47 Marriage Roll 48 Fountain Roll 49 Transfer roll 50 applicator rolls 51 Group Pan 52 Dancer Roll 100 kitchen towel rolls

Claims

1. A kitchen towel made of three laminated sheets, Among the three sheets, two sheets are single embossed bonded sheets laminated in a single embossed laminate structure, having an embossed recess on one side and an embossed protrusion corresponding to the embossed recess on the other side; the remaining sheet of the three sheets is a micro-embossed sheet having, over its entire surface, micro-embossed depressions on one side that are smaller in area and shallower in depth than the embossed depressions of the single-embossed bonded sheet, and having, over its other side, micro-embossed protrusions that correspond to the micro-embossed depressions; the single embossed bonded sheet and the micro embossed sheet are laminated in a double embossed laminated structure such that the embossed convex portion of the single embossed bonded sheet faces the micro embossed sheet, and are bonded to each other via an adhesive glue interposed between the embossed convex portion of the single embossed bonded sheet and the micro embossed sheet; The density of the embossed protrusions of the single embossed bonded sheet is 3 pieces / cm 2 More than 30 pieces / cm 2 is as follows: A kitchen towel characterized in that the ratio of the number of embossed convex portions of the single embossed bonded sheet that contribute to adhesion to the micro embossed sheet to the total number of the embossed convex portions of the single embossed bonded sheet is 30% or more.

2. The density of the micro-embossed convex portions of the micro-embossed sheet is 20 pieces / cm 2 More than 70 pieces / cm 2 2. The kitchen towel according to claim 1, wherein:

3. The kitchen towel according to claim 1 or 2, characterized in that the single embossed bonded sheet and the micro embossed sheet are laminated so that the embossed convex portions of the single embossed bonded sheet and the micro embossed convex portions of the micro embossed sheet face each other, and are bonded together via an adhesive glue interposed between the embossed convex portions of the single embossed bonded sheet and the micro embossed convex portions of the micro embossed sheet.

4. The kitchen towel according to claim 1 or 2, characterized in that the single embossed bonded sheet has a non-embossed convex portion on the side having the embossed convex portion, and no adhesive is interposed between the non-embossed convex portion and the micro-embossed sheet.

Images