Kitchen paper roll assembly packaging body

Abstract

The invention provides an integrated packaging body for kitchen paper rolls, which realizes improvement of flattening of the paper rolls, increase of cut number and roll length and maintenance of quality. The problem is solved by a collective packaging body for kitchen paper rolls in which kitchen paper rolls are packaged by being arranged in two or more rows in a circumferential face-to-ground manner so that each end face faces the top and bottom direction, the collective packaging film having a film thickness of 40 [mu] m to 60 [mu] m, and having a thickness of 20 [mu] m to 30 [mu] m and a thickness of 20 [mu] m to 30 [mu] m. The kitchen paper has a laminated structure formed by laminating sheet materials with concave and convex parts generated by embossing processing, the paper thickness of the kitchen paper is more than 420 [mu] m and less than 520 [mu] m, the weight per unit area of each layer is more than 23.5 g / m2 and less than 26 g / m2g, the length of the kitchen paper roll is 22.05-33.60 m, the cut number is 105-160 cuts, and the winding hardness is more than 16-25.5 N. The kitchen paper roll is characterized in that the thickness of the kitchen paper roll is more than 420 [mu] m and less than 520 [mu] m, the weight per unit area of each layer is more than 23.5 g / m2 and less than 26 g / m2g.

Description

Technical Field

[0001] The invention relates to a kitchen paper roll collective packaging body for packaging a plurality of kitchen paper rolls. Background Art

[0002] Kitchen paper is mainly used in the kitchen for cooking, cleaning, wiping, filtering oil, etc. It has many uses, but is frequently used to remove water from food, wipe moisture attached to tableware, and wipe dirt in the kitchen.

[0003] Kitchen paper has the form of a kitchen paper roll in which a strip of kitchen paper is wound into a roll. The kitchen paper roll has perforations arranged at predetermined intervals in the long side direction, and the number of sheets that can be cut and used by the perforations is called the cut number, etc., which serves as a benchmark for the number of times a user can use it. Although the cut number in the previous kitchen paper rolls varies depending on the manufacturer, it is well known that there are 70 to 75 cuts. There are also known kitchen paper rolls with the perforations set to about half the interval of the 70 to 75 cuts product, which is about 120 cuts, but in terms of the roll length, it is roughly the same as the 70 to 75 cuts product.

[0004] In recent years, due to changes in people's lifestyles, daily necessities such as kitchen paper rolls are expected to have high storage and storability. In addition, due to the restrictions on behavior caused by the spread of the new coronavirus infectious disease (COVID-19), the time spent at home has become longer, and among the kitchen paper rolls needed at home, for example, long-shaped products with larger cuts and longer rolls are expected.

[0005] On the other hand, kitchen paper rolls are sold in the form of a collective package in which 2 to 8 kitchen paper rolls are collectively housed in a gusseted packaging bag. Among them, there is a well-known form of collective packaging in which two kitchen paper rolls are collectively packaged in a manner in which the tube surfaces of the two kitchen paper rolls are butted against each other.

[0006] A problem with conventional paper roll collective packaging bodies is that paper rolls are relatively soft and therefore difficult to be tightly packaged with a collective packaging film, so that the paper rolls move within the gusset package or deform during the process.

[0007] Patent Document 1: Japanese Patent Application Publication No. 2015-67328

[0008] Patent Document 2: Japanese Patent Application Publication No. 2003-104449

[0009] Patent Document 3: Japanese Patent Application Publication No. 2017-115263

[0010] Patent Document 4: Japanese Patent Application Publication No. 2011-153387 Summary of the invention

[0011] However, in order to solve this problem, when an attempt is made to tightly package the paper towel roll using a multi-pack film, there is a high possibility that the edges of the paper towel roll, especially the end surfaces, will be crushed by the film.

[0012] In addition, in order to solve this problem, if the paper towel is only rolled strongly around the paper core to make the paper towel roll hard, the paper may be broken at the perforation line due to the elongation of the paper towel during rolling, the weight per unit area or the paper thickness may be reduced, and the unevenness formed by the embossing process may be flattened, resulting in a decrease in quality such as water absorption, wiping properties, and thickness. If the paper towel is rolled strongly while maintaining the roll diameter, the above-mentioned cut number and roll length can be increased, so this is also useful in this regard, but it becomes a problem to ensure quality.

[0013] The paper quality required for kitchen paper is established because various physical property values ​​are complexly related. Therefore, it is not enough to simply compromise between the increase in the number of cuts and roll length of kitchen paper rolls desired by the user and the number of cuts and roll lengths that are hard enough to be not easily flattened in the collective packaging. In addition, there are long rolls of toilet paper as a roll product used daily like kitchen paper rolls. However, since the length and roll diameter of toilet paper used by users at one time are different, the design concept is different, so it is difficult to design them in the same way.

[0014] Therefore, the main purpose of the present invention is to provide a kitchen paper roll collective packaging body, which can improve the flattening of kitchen paper rolls produced in the above-mentioned conventional kitchen paper roll collective packaging bodies, increase the number of cuts and roll lengths desired by users, and have the same performance quality as conventional products.

[0015] A first solution to the above-mentioned problem is a kitchen paper roll assembly package, which is formed by gusseting kitchen paper rolls wound into a roll shape using a resin packaging film, and is characterized in that:

[0016] The packaging film has a thickness of 40 μm to 60 μm.

[0017] The kitchen paper roll has a roll length of 22.05 m to 33.60 m, a cut number of 105 cuts to 160 cuts, and a winding hardness of 16 N to 25.5 N.

[0018] The kitchen paper has a laminated structure in which two sheets with concavoconvex shapes formed by embossing are laminated on each other, the paper thickness is more than 420 μm and less than 520 μm, and the unit area weight of each layer is more than 23.5 g / m 2 And less than 26g / m 2 .

[0019] According to the kitchen paper roll collective packaging body of the first embodiment, in the kitchen paper roll collective packaging body of the second embodiment,

[0020] The sheet has a concave portion on one surface and a convex portion corresponding to the concave portion on the other surface.

[0021] The kitchen paper is configured such that the convex portions of one sheet face the portion of the other sheet where the convex portions are not formed, and the convex portions of the other sheet face the portion of the one sheet where the convex portions are not formed, and the convex portions of the other sheet face the portion of the one sheet where the convex portions are not formed, and the convex portions of the other sheet face the portion of the one sheet where the convex portions are not formed, and only concave portions are formed on the front and back surfaces.

[0022] According to the kitchen paper roll collective packaging body of the first or second embodiment, in the kitchen paper roll collective packaging body of the third embodiment,

[0023] The area of ​​the concave portion of the kitchen paper is greater than 1.0 mm 2 And less than 2.0mm 2 , the total area ratio of the concave portions on each surface is greater than 10%.

[0024] According to the kitchen paper roll collective packaging body of the first or second embodiment, in the kitchen paper roll collective packaging body of the fourth embodiment,

[0025] The sheets of the kitchen paper are bonded to each other using an adhesive.

[0026] According to the kitchen paper roll collective packaging body of the first or second embodiment, in the kitchen paper roll collective packaging body of the fifth embodiment,

[0027] The lateral liquid absorption height of the kitchen paper is greater than 73 mm / 100 s.

[0028] According to the kitchen paper roll collective packaging body of the first or second embodiment, in the kitchen paper roll collective packaging body of the sixth embodiment,

[0029] The kitchen paper has a wet tensile strength of 882 cN / 25 mm or more in the longitudinal direction and a wet tensile strength of 471 cN / 25 mm or more in the transverse direction.

[0030] According to the present invention, a kitchen paper roll collective packaging body is provided, which achieves improvement in the flattening of kitchen paper rolls produced in existing kitchen paper roll collective packaging bodies, increases in the number of cuts and the length of rolls desired by users, and has the same performance quality as conventional products. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a front view for explaining the gusset package which is an embodiment of the present invention.

[0032] Figure 2 It is shown Figure 1 Schematic diagram of section II-II.

[0033] Figure 3 It is a perspective view of the kitchen paper roll collective package according to the embodiment of the present invention.

[0034] Figure 4 It is a front view of the kitchen paper roll collective package according to the embodiment of the present invention.

[0035] Figure 5 It is a side view of the kitchen paper roll collective package according to the embodiment of the present invention.

[0036] Figure 6 It is a perspective view of another kitchen paper roll assembly package according to an embodiment of the present invention.

[0037] Figure 7 It is a perspective view of a kitchen paper roll according to an embodiment of the present invention.

[0038] Figure 8 It is a top view for explaining the recessed portion formed by embossing of the present invention.

[0039] Fig. 9 It is a cross-sectional view for explaining the recessed portion formed by embossing of the present invention.

[0040] Fig.10 It is a schematic diagram for explaining the embossing process of the present invention.

[0041] Description of symbols

[0042] 1: kitchen paper roll assembly packaging body; 10: kitchen paper roll; 11: kitchen paper; 12: paper core; 13: end surface; 14: peripheral surface; 20: gusset packaging bag (packaging film); 20A: bag body; 20T: top surface; 20F: front surface; 20B: back surface; 20e: side; 21: splicing part; 22: welding part; 23: finger hook hole; 24: handle; 30: sheet; 31: concave part; 32: convex part; 41: embossing roller; 42: elastic roller; 43: gluing device; 1: distance between top surface and welding part; L2: width of kitchen paper roll; L3: diameter of kitchen paper roll; L4: diameter of paper core of kitchen paper roll. DETAILED DESCRIPTION

[0043] Next, refer to Figures 1 to 9 The embodiment of the kitchen paper roll assembly packaging body 1 of the present invention is described in detail. In addition, the present invention is not limited to the illustrated shape and the embodiment. Within the scope of the present invention, the detailed shape, position, etc. of each part can be changed within the scope that does not hinder the effect of the present invention.

[0044] The kitchen paper roll collective package 1 of the present embodiment (hereinafter, also referred to as the "collective package 1") is formed by gusseting a kitchen paper roll 10 in a roll form by winding a strip of kitchen paper 11 around a paper core 12 using a resin packaging film 20. In the gusseted packaging of the illustrated embodiment, the side portions 20e, 20e of the cylindrical packaging film 20 are folded into the inside of the bag to become flat, and the top side is fused, and the side portion 20E is opened to form a splicing portion 21, and the portion closer to the bottom side than the bottommost position of the fused portion 22 becomes the bag body 20A, and the kitchen paper roll 10 is stored in the bag body 20A. In addition, the handle portion 24 formed with a finger hook hole 23 is formed at a position closer to the top side than the bottommost position of the fused portion 22. In addition, the bottom is also sealed by welding in the same way as the top. In addition, hereinafter, among the surfaces connected to the joint portion 21, the surface connected to the handle portion 24 is referred to as the top surface 20T, one of the two surfaces connecting the top surface 20T and each joint portion 21 is referred to as the front surface 20F, and the other surface is referred to as the back surface 20B. However, the front surface 20F and the back surface 20B are opposite, and it is not limited to which surface is set as the front surface.

[0045] The handle portion 24 of the present invention is preferably formed by arranging the linear weld portion 22 as a whole in a grid shape as shown in the figure. In this manner, it will not be accidentally torn, and in addition, a handle portion 24 with higher rigidity can be formed. However, in the present invention, the shape and location of the weld portion 22 are not limited. In addition, the weld portion 22 can be welded by heat or ultrasonic welding. As long as the top side can be sealed, there is no limitation. Moreover, in the manner shown in the figure, finger hook holes 23 are formed at two locations of the handle portion 24, especially in the central portion in the width direction, but the shape, position, and number of the finger hook holes 23 are also not limited. These structures involved in the gusset packaging are not limited to the manner shown in the figure, and the structure of the known gusset packaging can be adopted within the scope that does not hinder the effect of the present invention.

[0046] On the other hand, as an arrangement of the kitchen paper rolls 10 in the packaging bag 20 in the collective packaging body 1 of the present invention, it is preferred that the kitchen paper rolls 10 are arranged in two or more rows with their end faces 13 facing the top and bottom and with their peripheral faces 14 butted against each other. Specifically, the preferred arrangement includes: Figure 3 to Figure 5 As shown, the two kitchen paper rolls 10 are arranged in a manner such that the end surfaces 13 of the kitchen paper rolls 10 face the top and bottom directions, and the circumferential surfaces 14 of the two kitchen paper rolls 10 are butted against each other; and Figure 6As shown, four rolls of kitchen paper rolls 10 are arranged with their circumferential surfaces 14 butted against each other in a manner that the end surfaces 13 of the kitchen paper rolls 10 face the top-bottom direction. In the illustrated manner, the kitchen paper rolls 10 form a single layer in the top-bottom direction, but they may also be arranged in two layers with their circumferential surfaces 14 butted against each other and in two layers with their end surfaces 13 butted against each other, for a total of four rolls. In addition, they may also be arranged in a manner that their circumferential surfaces 14 butted against each other and in two layers with their end surfaces 13 butted against each other, for a total of eight rolls. Since they can be tightly packed, a manner particularly suitable for the present invention is to arrange and pack two rolls of kitchen paper rolls 10 with their circumferential surfaces 14 butted against each other in a manner that the end surfaces 13 of the kitchen paper rolls 10 face the top-bottom direction. Figure 3 to Figure 5 In these embodiments, the end face 13 of the kitchen paper roll 10 faces the top and bottom direction, so that when the collective packaging body 1 is placed on the floor, etc., it is stable, and the kitchen paper roll 10 is not crushed. In particular, in the gusseted package, when the handle 24 is grasped, a force is applied to bring the front face 20F and the back face 20B closer together, but Figure 3 to Figure 5 In the case of the arrangement of two rolls of kitchen paper 10 shown in the figure, there is only one roll of kitchen paper 10 between the front side 20F and the back side 20B, so the kitchen paper rolls 10 are not pressed against each other, which is particularly preferred in terms of shape retention. However, the arrangement of the kitchen paper rolls 10 in the collective packaging body 1 of the present invention is not necessarily limited to these methods, and for example, it can also be packaged in a form in which a plurality of kitchen paper rolls 10 are stacked in the top and bottom directions in a manner that each end face 13 faces a direction perpendicular to the top and bottom directions and the circumferential surfaces are connected to each other.

[0047] The type of the resin packaging film 20 of the present invention is not necessarily limited. Examples include polyethylene film, polypropylene film, polyester film, polyethylene terephthalate film, nylon film, vinylidene chloride film, monolayer film of ethylene-vinyl alcohol copolymer, or laminated film formed by appropriately stacking these films, and gas barrier film formed by surface treatment such as aluminum vapor deposition on these films. In addition, biomass films derived from plant raw materials such as sugar cane, potato (starch), and corn can also be used. From the perspective of environmental protection, it is preferred to use such biomass films. In particular, polypropylene film and polyethylene film are preferred from the perspective of being cheap, excellent in weldability, having moderate stretchability, and being easy to appropriately and tightly pack the kitchen paper roll 10 when forming the gusset package of the present invention. In addition, the packaging film 20 can also be a pear skin film with excellent design and feel. The melting point of the film is preferably below 150°C. In addition, the lower the melting point of the packaging film, the more it can be heat-welded at low temperatures, but the actual lower limit is 80°C. Examples of polypropylene include non-oriented polypropylene films (CPP), and examples of polyethylene films include linear low-density polyethylene films (LLDPE), low-density polyethylene films (LDPE), and medium-density polyethylene films (MDPE).

[0048] On the other hand, the film thickness of the resin packaging film 20 of the collective packaging body 1 is 40 μm to 60 μm. When the film thickness is within the range of 40 μm to 60 μm, it is easy to weld the films to each other to form a gusseted package. In addition, combined with the structure of the kitchen paper roll 10 described later, the problem of deformation and flattening of the kitchen paper roll 10 can be particularly solved. In addition, the softness of the preferred packaging film is 130 mN or more and 240 mN or less, the tensile strength (breaking strength) is 11 N or more and 23 N or less, and the tensile elongation (breaking elongation) is 400% or more and 1200% or less. If it is this packaging film, the problem of deformation and flattening of the kitchen paper roll 10 is improved, especially when forming a gusseted package. Here, the softness is measured by a hand feel meter according to JAPAN TAPPI NO.34. The sample is 100 mm × 100 mm in size, and the slit width of the hand feel meter is 5 mm (± 0.5 mm). The film is measured 10 times in the vertical and horizontal directions. At this time, it is measured 5 times on the front and back sides. The measured value is the average value of the vertical and horizontal directions. In addition, the tensile strength (breaking strength) and the tensile elongation (breaking elongation) are measured in accordance with ISO527-3: 2012 (JIS K 7127: 1999) using a tensile testing machine, such as a desktop precision universal testing machine (SHIMADZU AG-X plus) or its equivalent equipment. When using software, the material testing operation software (TARPEZIUM LITE X) or equivalent software can be used. The measurement sample is 10mm×120mm in size, the distance between the chucks is 50mm, and the tensile speed is 500mm / min in the length direction. Regarding the measurement, 5 measurements are made in the vertical and horizontal directions, and the average value is taken.

[0049] In the collective packaging body 1 of the present invention, it is particularly preferred that the distance L1 from the uppermost position of the top surface side of the kitchen paper roll 10 contained therein to the welded portion 22 is 38.2% to 46.7% of the roll diameter. As a specific value, it is preferably 42 mm to 57 mm. When it is within this range, combined with the structure of the kitchen paper roll 10 described later, when the handle portion 24 is lifted, the edge of the end surface 13 of the kitchen paper roll 10 is not easily crushed.

[0050] On the other hand, in the collective packaging body 1 of the present invention, specifically, Figure 7 As shown, the kitchen paper roll 10 stored in the packaging bag 20 is formed by winding a strip of kitchen paper 11 on a paper core 12, and in particular, the roll length is 22.05m to 33.60m, and the number of cuts is 105 to 160. With this roll length and number of cuts, the usable amount is about 1.5 to 2 times that of the existing 70 to 75 cut products, and the demander can also realize that the storage and storage properties are excellent. The number of cuts refers to the number of sheets when cut at the perforated line.

[0051] In the collective packaging body 1 of the present invention, it is preferred that the perforated line strength of the kitchen paper roll 10 contained in the packaging bag 20 is 350 to 850 cN / 100 mm. It is easy to cut when in use, and further, it is easy to form the winding hardness of the present invention. In addition, the perforated line strength is measured according to the measurement method of dry tensile strength based on JIS P 8113 (2006). Specifically, for the test piece, a test piece having a perforated line in the approximate center in the longitudinal direction and cut into a width of about 25 mm (± 0.5 mm) × length of about 150 mm is used. For the test piece, the measurement is performed while maintaining the multi-layer state. For the testing machine, a load cell tensile testing machine TG-200N manufactured by Minebea Co., Ltd. or an equivalent device thereof is used. In addition, the sample is placed in a manner such that the clamping interval is 100 mm and the position of the perforated line is centered. The tensile speed is set to 100 mm / min. The measurement is carried out in the following steps: fasten both ends of the test piece to the clamps of the test machine, apply a tensile load to the paper piece in the vertical direction, and read the indicated value when the perforation line breaks (in the case of digital value, it is a digital value). Perform 5 measurements, and the average value of the measured values ​​is taken as the perforation line strength.

[0052] The size of the kitchen paper roll 10 of the present invention is not necessarily limited, but preferably the height (width) L2 is 223 mm to 235 mm, the diameter (roll diameter) L3 is 114 mm to 126 mm, and the inner diameter (core diameter) L4 is 35 mm to 45 mm. The problem of flattening of the kitchen paper roll and the problem of paper quality can be easily solved. In addition, the diameter is a value measured using a circumferential tape measure manufactured by MURATEC KDS Co., Ltd. or an equivalent device.

[0053] In particular, the kitchen paper roll 10 of the present invention has a structure of the kitchen paper of the present invention, and its winding hardness is 16N or more and 25.5N or less. As long as it is within the range of this winding hardness, the flattening of the kitchen paper roll produced in the conventional kitchen paper roll assembly package can be improved, and a kitchen paper roll with the same performance as the conventional product can be obtained. Here, the winding hardness of the present invention is a value obtained by winding a circumferential tape measure (manufactured by MURATEC KDS Co., Ltd.) and its equivalent equipment around the central part between the end faces of the kitchen paper roll in the circumferential direction and measuring the force required to subtract three scale marks from the π scale mark using a push-pull force meter (manufactured by IMADA Co., Ltd.) and its equivalent equipment.

[0054] Here, if Figure 8 and Fig. 9As shown, the kitchen paper 11 of the present invention has a laminated structure in which sheets 30, 30 with concavoconvex shapes formed by embossing are laminated. When the laminated structure in which sheets with concavoconvex shapes formed by embossing are laminated is formed, gaps are formed between the sheets, and the liquid absorption and liquid absorption of moisture and oil attached to food, tableware, sinks and other kitchen surroundings are improved, and the scraping property of dust, dirt and dirt is improved due to the concavoconvex shapes on the surface of the sheet, so the convenience as the kitchen paper 11 is improved. In addition, when the kitchen paper roll 10 is wound into a roll shape and stored in a packaging film as the collective packaging body of the present invention, it is possible to ensure appropriate winding hardness and hardness of the end edge portion in combination with other structures, and has the same performance quality as conventional products, and can achieve improvement in the flattening of the kitchen paper roll 10 and increase in the number of cuts and the length of the roll.

[0055] In particular, Fig. 9 As shown, the kitchen paper 11 is preferably a laminated structure as follows: a concave portion 31 is formed on one surface of each sheet 30, 30, and a convex portion 32 corresponding to the concave portion 31 is formed on the other surface, and the convex portion 32 of one sheet 30 faces the portion of the other sheet 30 where the convex portion 32 is not formed, and the convex portion 32 of the other sheet 30 faces the portion of the one sheet 30 where the convex portion 32 is not formed, so that only the concave portion 31 is formed on the front and back surfaces. This laminated structure is sometimes referred to as a nested double embossing. Compared with a laminated structure in which the convex portions of each sheet are laminated facing each other, the number of convex portions cross-linked between the sheets can be increased, so that the distance between the sheets can be shortened and the paper thickness can be reduced. On the other hand, due to the cross-linking of the protrusions 32, the kitchen paper 11 itself is not easily crushed in the thickness direction. Even if the winding hardness is increased, it is not easily crushed in the thickness direction, which can easily improve the crushing of the kitchen paper roll 10 and ensure the quality of the same performance as the previous product.

[0056] Furthermore, it is preferable that the area of ​​one recess 31 formed in each sheet 30 by embossing is greater than 1.0 mm. 2 And less than 2.0mm 2, the total area ratio of the concave parts 31 on each side of the kitchen paper 11 is 10% or more. As for the area of ​​the concave parts 31, any 10 concave parts are measured, and the average value thereof is used as the final area of ​​the concave parts. When the area of ​​one concave part 31 and the total area of ​​the concave parts 31 on one side are within the above range, the absorption of water and oil, the amount of absorption, and the scraping property of dust, dirt, and dirt are particularly excellent, and since a sufficient number of convex parts are cross-linked between the sheets, it is also particularly excellent in improving the flattening of the kitchen paper roll 10. In addition, the upper limit of the total area ratio of the concave parts 31 is not necessarily limited, and is at most 50%, preferably 25%, and particularly preferably 15%. When it is within this range, the balance between the part where the rigidity is improved by forming the concave parts 31 by embossing and the part where the rigidity is not improved by not forming the concave parts 31 is improved.

[0057] In the kitchen paper 11 of the present invention, the shape of a concave portion is not necessarily limited. It can be a suitable shape such as a rectangle, a circle, an ellipse, etc. A plurality of shapes may also be mixed. Preferably, it is a shape without corners such as an ellipse, a circle, etc., and particularly preferably, Figure 8 The circular shape shown. In addition, the pattern of the pattern formed by the plurality of recesses is not limited in the present invention. It can be an appropriate pattern in consideration of the design. Figure 8 In the figure, a pattern similar to a heart shape or a four-leaf clover formed by combining four heart shapes is illustrated, but the present invention is not limited to this example.

[0058] In addition, the area of ​​the recess 31 can be measured, for example, by a one-shot 3D measuring microscope VR-3200 manufactured by KEYENCE Co., Ltd. or its equivalent, and image analysis software "VR-H1A" or its equivalent. Regarding the measurement, the measurement is performed under the conditions of a magnification of 12 times and a field of view of 24 mm×18 mm. However, the magnification and the field of view can be appropriately changed according to the size of the embossing (recess). Regarding the specific measurement sequence, using the above-mentioned software, from the image portion represented by the plane viewpoint, an embossing (recess) 31 whose contour is clearly displayed to a measurable degree is visually selected, and the area inside the contour is measured. In the case of the unit area weight and roll length of the kitchen paper of the present invention, it is possible to maintain the recess 31 transferred to the sheet without excessive distortion.

[0059] In the kitchen paper 11 of the present invention, the depth of the concave portion 31 formed in each sheet 30 by embossing is not necessarily limited. Preferably, the processed sheet is embossed using an embossing roller having a height of 0.20 mm to 0.55 mm for forming the concave portion 31 on the sheet 30 to form a laminated structure, thereby adjusting the paper thickness of the kitchen paper 11 of the present invention to the range. In this case, the paper thickness of the portion of the sheet 30 without the concave portion 31 is approximately 130 μm to 390 μm. In addition, the method for measuring the paper thickness of the sheet is the same as the method for measuring the paper thickness of the kitchen paper 11.

[0060] On the other hand, the concavoconvex in the kitchen paper 11 of the present invention is preferably formed by embossing based on the steel rubber method in the embossing process. Fig.10 As shown, the sheet 30 is given the concavo-convex formed by embossing by passing between a metal embossing roller 41 having a plurality of embossing convex portions corresponding to the embossing shape and embossing pattern formed on the surface and a receiving roller 42 whose surface is made of elastic material, and the receiving roller 42 receives the embossing roller 41. Moreover, in order to form the above-mentioned nested form, the concavo-convex portions generated by embossing are formed on each sheet 30, and the sheets are stacked one on another in a manner that the convex portions face each other and their positions are staggered.

[0061] Furthermore, it is preferred that the kitchen paper 11 of the present invention is formed by bonding the sheets 30, 30 to each other using an adhesive. Specifically, the adhesive may be applied to the entire surface of the facing surface of one sheet 30 or two sheets 30, 30 and the sheets may be bonded to each other at the convex portions 32 formed by embossing. Alternatively, the adhesive may be applied to the top of the convex portions 32 formed by embossing of one sheet 30 or two sheets 30, 30 and the sheets 30, 30 may be bonded to each other at the convex portions 32. In this case, the adhesive may be applied to only a part of the convex portions 32 instead of all of the convex portions 32 and the sheets 30, 30 may be bonded to each other using the adhesive applied to the top of the part of the convex portions 32. In order to apply the adhesive to the convex portions, in particular, the top portions, for example, Fig.10 As shown, the adhesive is applied to the sheet 30 conveyed while being wound around the embossing roller by the gluing device 43. By gluing the sheets 30, 30 to each other, the sheets 30, 30 are less likely to shift from each other, the convex portions 32 cross-linked between the sheets 30, 30 are less likely to be crushed, and the concave portions 31 formed by the embossing process are excellent in terms of the liquid absorption and amount of water and oil, and the scraping property of dust, dirt, and dirt, and the rigidity is improved, so that it is less likely to be crushed in the thickness direction, and thus it is particularly excellent in terms of improving the crushing of the kitchen paper roll 10.

[0062] The adhesive of the present invention can use a known adhesive used in the kitchen paper 11 having a laminated structure. As such an adhesive, for example, there can be mentioned adhesives such as hot melt, polyvinyl alcohol, starch, modified starch, carboxymethyl cellulose, etc. A preferred adhesive in the kitchen paper 11 of the present invention is a hot melt adhesive, which is particularly preferred in the case of a nested laminated structure. The hot melt adhesive increases the rigidity of the convex portion 32 without impairing the softness and flexibility, and it is easy to prevent the sheets 30, 30 from being crushed. In addition, since the hot melt adhesive can form concave and convex while melting the adhesive, it is easy to maintain the concave and convex shape deformed by embossing. In this way, since the shape maintenance of the concave and convex is excellent while maintaining flexibility and softness, it is easy to obtain the following product: in particular, the water absorption is not reduced, and the same quality as before is obtained, and the winding hardness is hardened and the film is packaged, which is particularly difficult to be crushed. In particular, when using the hot melt adhesive, its concentration is preferably 5.5% by mass to 7.5% by mass. The advantages of the hot melt adhesive described above can be easily utilized.

[0063] On the other hand, the paper thickness of the kitchen paper 11 of the present invention is greater than 420 μm and less than 520 μm, and the weight per unit area of ​​each sheet 30 is greater than 23.5 g / m 2 And less than 26g / m 2g. By setting the paper thickness and the basis weight in the above range, the following kitchen paper 11 is obtained: the sheet 30 itself has appropriate stiffness, the flattening of the kitchen paper 11 in the thickness direction is improved, and the number of cuts and the roll length are increased, and the quality has the same performance as the conventional product, and the collective packaging body 1 in which the kitchen paper roll 10 is not easily flattened can be obtained. In particular, by setting the above-mentioned preferred concave portion 31 formed by embossing and the stacking structure within the range of the paper thickness and the basis weight, the effect of the present invention can be more appropriately manifested. The basis weight is measured by the basis weight measurement method of JIS P 8124 (1998). The paper thickness is measured in a two-layer state using a dial thickness gauge (thickness measuring instrument) "PEACOCK G type" (manufactured by Ozaki Seisakusho) under the same conditions after the test piece is fully humidified under the conditions of JIS P 8111 (1998) (usually about 8 hours). Specifically, first confirm that there is no dirt, dust, etc. between the plunger and the measuring table, and lower the plunger onto the measuring table, so that the scale of the dial thickness gauge moves and aligns with the zero point, then raise the plunger, place the sample on the test bench, slowly lower the plunger, and read the thickness gauge at this time. During measurement, the plunger is only placed without being pressed. The terminal of the plunger is made of metal, and a circular plane with a diameter of 10 mm is vertically abutted against the paper plane. In addition, the paper thickness is the average value obtained by measuring 10 times. Here, when measuring the paper thickness, it is assumed that the embossing (concave part) is flattened, but the paper thickness of the present invention is a value measured inwardly including such flattening, and such flattening can be ignored. In this paper thickness measurement, the difference in paper thickness caused by the flattening of the concave part can be ignored.

[0064] On the other hand, it is preferred that the transverse liquid absorption height of the kitchen paper 11 of the present invention is 73 mm / 100 s or more. The transverse liquid absorption height becomes an index of the liquid absorption of the kitchen paper 11. If it is 73 mm / 100 s or more, it can be said that the liquid absorption is equivalent to that of the existing kitchen paper 11, and it can be said that it is not inferior in quality, especially in liquid absorption, compared with the existing kitchen paper. Here, the transverse liquid absorption is measured as follows. The kitchen paper is cut into a length of 250 mm or more in the longitudinal direction and 15 mm ± 1 mm in the transverse direction as a sample. Five samples are prepared. The test machine uses a water absorption measuring instrument (model: XSY-200, manufactured by Hangzhou Qingtong Bo Ke Automation Technology Co., Ltd.) or its equivalent. Deionized water is placed in the water absorption box of the test machine. The water level reaches the partition plate located in the middle of the water absorption box. The handle of the test machine is lowered, and after confirming a "click" sound, a standard ruler is inserted into the deionized water to confirm whether the part of the 5 rulers of the test machine inserted into the water (insertion height) is 5 mm. In the case where the insertion heights of the 5 rulers are different, adjust the height of the screws of the equipment to make the heights of the rulers consistent. Next, lift the handle of the tester and clamp the sample in the water absorption measurement device. At this time, make the top of the sample consistent with the top of the ruler. Next, slowly lower the handle of the tester and insert the sample vertically to the position of 5mm of the ionized water. At the same time, use a stopwatch to measure for 100 seconds. After 100 seconds, read the height of the liquid absorption by visual inspection and record it in units of 1mm.

[0065] On the other hand, the kitchen paper 11 of the present invention preferably has a longitudinal wet tensile strength of 882 cN / 25 mm or more and a transverse wet tensile strength of 471 cN / 25 mm or more. Sufficient strength and firmness can be obtained during use. In particular, the strength and firmness during use at the same level as those of conventional kitchen paper can be ensured. In addition, it is easy to adjust to an appropriate winding hardness when rolled. In addition, the longitudinal direction of the paper is also called the MD direction, which is the flow direction during papermaking. The transverse direction of the paper is also called the CD direction, which is a direction perpendicular to the flow direction (MD direction) during papermaking. In addition, the wet tensile strength of the present invention is a value measured based on JIS P8135 (1998), and is measured as follows. Regarding the test piece, a test piece cut to a width of about 25 mm (± 0.5 mm) × a length of about 150 mm is used in both the longitudinal and transverse directions. Regarding the testing machine, a load cell tensile testing machine TG-200N manufactured by Minebea Co., Ltd. and equivalent equipment thereof are used. In addition, the clamping interval is set to 100 mm, and the tensile speed is set to 50 mm / min. For the test piece, a test piece that has been cured in a dryer at 105°C for 10 minutes is used. The measurement is performed in the following steps: After fastening both ends of the test piece to the clamp of the test machine, use a water-containing brush to apply water horizontally to the center of the test piece with a width of about 10 mm, and then immediately apply a tensile load to the paper in the up and down directions, and read the indicated value (digital value) when the paper breaks. Prepare 5 groups of samples, measure each 5 times, and use the average value of the measured values ​​as the wet tensile strength.

[0066] On the other hand, the constituent fibers in the kitchen paper 11 of the present invention are not necessarily limited, but preferably 100% by mass of pulp. In particular, when the pulp is 100% by mass, it is particularly preferred that the pulp is composed of pulp derived from coniferous trees (also referred to as N material) and pulp derived from broad-leaved trees (also referred to as L material). In this case, the ratio of N material to L material is preferably L material: 0% to 50%, N material: 100% to 50%. Examples of the pulp derived from coniferous trees (N material) include NBKP (coniferous tree kraft pulp) and NUKP (coniferous tree unbleached pulp). Examples of the pulp derived from broad-leaved trees (L material) include LBKP (broad-leaved tree kraft pulp) and LUKP (broad-leaved tree unbleached pulp).

[0067] In particular, it is preferred that 55% or more of the constituent fibers of the kitchen paper 11 of the present invention are oxygen-cooked and non-chlorine-bleached conifer kraft pulp. Preferably, 80% or more, and particularly preferably substantially 100% by mass, excluding impurities, are oxygen-cooked and non-chlorine-bleached conifer kraft pulp. More specifically, the conifer kraft pulp is also called NOKP, which is produced by continuously performing oxygen cooking in a continuous cooking furnace, and is not subsequently subjected to bleaching treatment with a chlorine-based bleaching agent. Here, among KP (kraft pulp) used for kitchen paper, there are bleached KP and unbleached KP, and the unbleached KP contains a large amount of lignin. Although the NOKP is not bleached with a chlorine-based bleaching agent, it is oxygen-cooked (oxygen delignification), so about half of the lignin is removed. In addition, chlorine-based bleaching agents include not only chlorine but also chlorine dioxide and sodium hypochlorite. Therefore, ECF pulp is not the above-mentioned coniferous kraft pulp of the present invention either.

[0068] The preferred kitchen paper 11 contains 55% by mass or more, preferably 80% to 100% by mass or more of coniferous kraft pulp that has not been bleached with a chlorine-based bleaching agent but has been subjected to delignification treatment by oxygen cooking. That is, since the coniferous kraft pulp is produced as the main fiber raw material, especially as the entire fiber raw material, it is safe for the human body when used and is environmentally friendly. In addition, the kitchen paper containing 55% by mass or more of the coniferous kraft pulp is light brown, and it is easy to give the impression of a natural product that has not been chemically treated even in appearance, and it has a soft impression, so the purchaser feels very relieved.

[0069] On the other hand, NOKP is processed by oxygen cooking to reduce the lignin content to about half of that before oxygen cooking, so it is easier to show flexibility and achieve strong strength than pulp that has not been delignified at all. In addition, since it is derived from coniferous trees, the fiber length is longer than that of pulp derived from broad-leaved trees, so paper dust is less likely to be generated, and combined with the effect of the fibers composed of lignin being not dense, it has excellent cushioning properties.

[0070] The fiber components other than NOKP are not necessarily limited, but from the viewpoint of having a light brown appearance and providing a sense of security that it has not been bleached with a chlorine-based bleaching agent, preferably hardwood kraft pulp (LOKP) that has been oxygen-cooked and not bleached with chlorine is preferred. It may be other raw pulp or waste paper pulp.

[0071] The kitchen paper 11 of the present invention preferably contains pulp fibers that are not unbeaten. The beating degree of the papermaking raw material during manufacturing is not necessarily limited, but it is preferably beaten in a manner that the Canadian standard water freeness decreases by 20cc to 50cc. This decrease is much lower than the beating degree of general papermaking raw materials. In this case, the Canadian standard water freeness of the papermaking raw material is approximately 600cc or more. In this way, by not beating the pulp fibers too much and not unbeaten, when the softener is added in a manner containing the above-mentioned softener, the softener is easily attached to the fiber surface, and the fibers are moderately entangled with each other, and it is easy to form the desired thinner paper thickness, excellent softness, and good fluffy feeling. Moreover, it is extremely difficult to generate paper powder. Further adjustment of the paper thickness can be further performed by the wrinkling rate.

[0072] The effects of the kitchen paper collective packaging body of the present invention will be further described below with reference to examples.

[0073] [Example]

[0074] Next, sensory evaluations were conducted on the kitchen paper rolls of the kitchen paper collective packaging of the present invention in terms of "tightness and aesthetics" in the collective packaging, "firmness" when the kitchen paper is used, "unbreakability when wiping after absorbing water", "feel of the sheet surface", "water absorption amount", and "water absorption speed". The physical properties and composition of the kitchen paper, kitchen paper rolls, and collective packaging of each example are shown in Table 1 below. The collective packaging of each example is Figure 3 The packaging shown is a gusseted packaging of two rolls of kitchen paper. In addition, the embossing of each example is Figure 8 The pattern shown has a nested stacking structure. In addition, the dry tensile strength was measured based on JIS P8113 (2006), and the test piece was cut into a width of 25 mm (± 0.5 mm) × a length of about 150 mm in both the longitudinal and transverse directions. The test piece was measured while maintaining the multi-layer state. The test machine used was a load cell tensile tester TG-200N manufactured by Minebea Co., Ltd., the clamping interval was set to 100 mm, and the tensile speed was set to 100 mm / min.

[0075] Regarding the sensory evaluation, 18 subjects actually used the samples of each example, and assigned scores with an absolute evaluation range of 1 to 5 for each item of "firmness", "unbreakable when wiping after absorbing water", "feel of the sheet surface", "water absorption", and "water absorption speed", and the average value was used as the evaluation value. In addition, regarding the evaluation, ordinary (not good nor bad) = 3 points (central value), and the limit is 5 points in the case of good, and 1 point in the case of poor, and the scores are scored in a way that there is a difference every 1 point. Regarding the "tightness and aesthetics" of the collective packaging, 18 subjects visually observed the collective packaging body, especially when the collective packaging body was lifted by the handle, to observe whether the kitchen paper roll in the packaging film shook, whether the upper edge of the roll was excessively flattened, and whether the circumference of the roll was excessively deformed. As with the sensory evaluation, scores were assigned with an absolute evaluation range of 1 to 5 points, and the average value was used as the evaluation value. In addition, regarding the evaluation, average (not good nor bad) = 3 points (median value), good is limited to 5 points, and bad is limited to 1 point, and the scoring is performed so that there is a difference every 1 point.

[0076] ◎[Table 1]

[0077]

[0078] ※If the cloth is not too thick, absorbs water sufficiently, and is easy to wipe, it will be rated high.

[0079] In the examples satisfying the physical property values ​​of the present invention when the physical property values ​​were confirmed as shown in Table 1, the results were equal to or higher than those of Comparative Examples 1 to 3 having the same roll length and number of cuts as the conventional products, especially in terms of perforation line strength and horizontal liquid absorption height. In each sensory evaluation, the evaluations were also equal to or higher than those of Comparative Examples 1 to 3 having the same roll length and number of cuts as the conventional products. On the other hand, in Comparative Example 5 having a roll length that was too long and a larger number of cuts than the product of the present invention, the evaluations of the functional properties related to liquid absorption, such as water absorption amount and water absorption speed, were lower than those of the comparative examples.

[0080] According to such results, the kitchen paper roll of the present invention has a large roll length and a large number of cuts, and has sufficiently high water absorption and perforation line strength, and also has a satisfactory feel in use. Therefore, it can be said that the kitchen paper roll collective packaging body achieves an improvement in the flattening of the kitchen paper roll produced in the existing kitchen paper roll collective packaging body, and an increase in the number of cuts and roll length desired by the user, and has the same performance quality as the conventional product.

Claims

1. A kitchen paper roll assembly packaging body, which is formed by gusseting a kitchen paper roll wound into a roll shape using a resin packaging film, characterized in that: The packaging film has a thickness of 40 μm to 60 μm. The kitchen paper roll has a roll length of 22.05 m to 33.60 m, a cut number of 105 cuts to 160 cuts, and a winding hardness of 16 N to 25.5 N. The kitchen paper has a laminated structure in which two sheets with concavoconvex shapes formed by embossing are laminated on each other, the paper thickness is more than 420 μm and less than 520 μm, and the unit area weight of each layer is more than 23.5 g / m 2 And less than 26g / m 2 .

2. The kitchen paper roll assembly package according to claim 1, wherein: The sheet has a concave portion on one surface and a convex portion corresponding to the concave portion on the other surface. The kitchen paper is configured such that the convex portions of one sheet face the portion of the other sheet where the convex portions are not formed, and the convex portions of the other sheet face the portion of the one sheet where the convex portions are not formed, and the convex portions of the other sheet face the portion of the one sheet where the convex portions are not formed, and the convex portions of the other sheet face the portion of the one sheet where the convex portions are not formed, and only concave portions are formed on the front and back surfaces.

3. The kitchen paper roll collective packaging body according to claim 1 or 2, wherein: The area of ​​the concave portion of the kitchen paper is greater than 1.0 mm 2 And less than 2.0mm 2 , the total area ratio of the concave portions on each surface is greater than 10%.

4. The kitchen paper roll collective packaging body according to claim 1 or 2, wherein: The sheets of the kitchen paper are bonded to each other using an adhesive.

5. The kitchen paper roll collective packaging body according to claim 1 or 2, wherein: The lateral liquid absorption height of the kitchen paper is greater than 73 mm / 100 s.

6. The kitchen paper roll collective packaging body according to claim 1 or 2, wherein: The kitchen paper has a wet tensile strength of 882 cN / 25 mm or more in the longitudinal direction and a wet tensile strength of 471 cN / 25 mm or more in the transverse direction.

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