Roll product package

Abstract

To provide a roll product package which maintains compactness even when a long roll product is packaged, prevents ink from peeling off from a printed part of a film, provides heat sealability to the film, maintains strength of the film, and is excellent in loading efficiency and transportability.SOLUTION: A roll product package in which 2 to 12 roll products are stored in a packaging bag made of a film, a winding softness of a roll product is 0.4 mm to 1.9 mm, a winding diameter is 90 mm or more and 160 mm or less, a roll weight is 200 g or more and 380 g or less, and a roll density is 0.14 g / cm3 or more and 0.32 g / cm3 or less, the film has a printed part and a varnished layer on a surface opposite to a surface in contact with outside air, and is corona-treated, a thickness of the film is 20 μm or more and 45 μm or less, and an amount of varnish applied is 1.3 g / m2 or more and 2.3 g / m2 or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a roll product package in which a roll product is packaged in a film. [Background technology]

[0002] Toilet paper is generally sold in packages of 4 rolls or 1-2 rolls.

[0003] Because these packages are bulky, the amount that can be carried when purchasing is limited, and the amount that can be purchased at one time is naturally limited. In addition, storage space is limited at home, at work, in public facilities, and the like. For this reason, toilet rolls have been developed that have a reduced basis weight per sheet and a longer roll length (i.e., longer).

[0004] In addition, the product name and pictures and patterns to improve design are printed with ink on the packaging film that wraps the toilet rolls. This printing is done on the inner surface of the packaging bag, i.e., the side of the packaging film that comes into contact with the toilet roll, to prevent the ink from falling off due to rubbing against the outer surface of the product that occurs during shipping, delivery, and when the product is carried after purchase.

[0005] As a prior art document of an invention related to a long toilet roll, for example, Patent Document 1 describes a roll-shaped toilet paper made by winding up a laminate of multiple overlapping webs into a roll, and the basis weight per web is 8 to 13 g / m. 2 The basis weight of the laminate obtained by overlapping the webs is 15 to 30 g / m 2 The laminate is wound into a roll having a wound length of 60 to 100 m and a diameter of 100 to 115 mm.

[0006] Patent Document 2 also describes a toilet paper roll in which two plies of long toilet paper are wound into a roll shape, and the basis weight of the sheet constituting each ply is 10 to 14 g / m 2 The difference in elongation rate of each sheet in the longitudinal direction is 2 to 10%, each sheet is integrated by a contact embossment formed on the edge of the width direction of the toilet paper, the diameter is 100 to 120 mm, and the winding length is 60 to 90 m.

[0007] Furthermore, as a prior art document of an invention relating to a toilet roll package in which printing is applied to a film, Patent Document 3 describes a toilet roll package in which a plurality of toilet rolls are packaged in a packaging film, in which the toilet rolls contain a fragrance, and the packaging film has an oxygen permeability of 40 cc / m 2 The toilet roll packaging disclosed herein is characterized in that the inner surface of the film substrate that comes into contact with the toilet roll is printed, and the printed portion is covered with a vinyl chloride resin layer. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2006-087703 A [Patent Document 2] JP 2013-208297 A [Patent Document 3] JP 2015-171907 A Summary of the Invention [Problem to be solved by the invention]

[0009] However, when the toilet roll and film rub against each other, there is a risk that the ink will adhere to the toilet roll. Furthermore, as the toilet roll becomes longer, the roll becomes less flexible (the roll becomes harder) and the roll becomes heavier, which makes it more susceptible to rubbing with greater force (poor abrasion resistance), and it is thought that this makes the ink more likely to peel off.

[0010] To prevent this, it was found that if a film coated with varnish was used on the ink-printed portion, the ink would not peel off easily, even if the roll inside was long. However, there was a problem with the varnish coated on the ink-printed portion, in that if the film was torn or rubbed too hard, the varnish would peel off along with the ink (poor peeling resistance). In other words, although the application of varnish is originally intended to prevent the ink from peeling off, in some cases it has actually promoted the peeling of the ink. Therefore, it was found that by subjecting the film to corona treatment, the ink would be more easily fixed and peel resistance would be improved even if the printed part was varnished, but this then gave rise to the problem of the film's poor heat sealability.

[0011] The present invention has been made in consideration of the above circumstances, and has an object to provide a roll product package that maintains compactness even when packaging a long roll product, in which the ink in the printed portion of the film has excellent abrasion resistance and peel resistance and is difficult to peel off, in which the film has heat sealability and maintains its strength, and which further has excellent loading efficiency and transportability. [Means for solving the problem]

[0012] The inventors of the present invention have conducted intensive research in view of the above problems. As a result, in a roll product package in which 2 to 12 roll products each having a 2-ply sheet of sanitary thin paper wrapped around it are stored in a packaging bag made of a film, the roll product's winding softness, winding diameter, roll weight per 114 mm of roll width, and roll density are specified, and the film includes a base layer, a printed portion, and a varnish coating layer, and a printed portion and a varnish coating layer are provided on the surface opposite to the surface in contact with the outside air, and corona treatment is performed, and the thickness of the film and the amount of varnish coating are specified, so that even if a long roll product is packaged, compactness is maintained, the ink in the printed portion of the film is excellent in both abrasion resistance and peel resistance and is difficult to peel off, the film has heat sealability, the strength of the film is maintained, and further, a roll product package having excellent loading efficiency and transportability can be obtained, and the above problems can be solved, and the present invention has been completed. Specifically, the present invention provides the following:

[0013] (1) A first aspect of the present invention is a roll product package comprising a packaging bag made of a film and 2 to 12 roll products each having a two-ply sheet of sanitary thin paper wrapped therein, the roll product having a roll softness of 0.4 mm to 1.9 mm, a roll diameter of 90 mm to 160 mm, a roll weight (excluding the core) of 200 g to 380 g per 114 mm of roll width, and a roll density of 0.14 g / cm. 3 More than 0.33g / cm 3 The film includes a base layer, a printed portion, and a varnished layer, has the printed portion and the varnished layer on the surface opposite to the surface in contact with the outside air, and is corona-treated, has a thickness of 20 μm or more and 45 μm or less, and has a coating amount of varnish of 1.3 g / m 2 More than 2.3g / m 2 1. A roll goods package comprising:

[0014] (2) A second aspect of the present invention is the roll product package described in (1), wherein the number of roll products stored is 4, 6, 8, or 12, the roll products are packed in the packaging bag with the axial direction facing up, in two or three rows of two products arranged in one or two rows, and the packaging bag is a cylindrical gusseted bag having a substantially rectangular main body that surrounds the roll products, and handle portions that extend upward from the opposing long sides of the upper side of the main body in a gable roof shape and are joined, and finger holes are formed in the handle portions.

[0015] (3) A third aspect of the present invention is a roll product package as described in (1), characterized in that when the package is packed into a cardboard box, two packages are stacked vertically in two layers.

[0016] (4) A fourth aspect of the present invention is the roll product package according to (1), characterized in that the varnish contains at least a resin and an auxiliary.

[0017] (5) A fifth aspect of the present invention is the roll product package described in (4), characterized in that the resin components contained in the varnish are polyamide resin in an amount of 50% by weight or more.

[0018] (6) A sixth aspect of the present invention is the roll product package according to (1), characterized in that the printed portion is disposed on a panel portion of the packaging bag. Effect of the Invention

[0019] According to the present invention, a roll product package can be provided which maintains compactness even when packaging a long roll product, the ink in the printed portion of the film has excellent abrasion resistance and peel resistance and is not easily peeled off, the film has heat sealability and maintains its strength, and further has excellent loading efficiency and transportability. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view illustrating an example of a roll product package according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, the form for carrying out the present invention (hereinafter, the embodiment) will be described in detail with reference to the drawings. However, these are presented for the purpose of illustration only and are not intended to limit the present invention.

[0022] <Roll product package> Fig. 1 is a perspective view showing an example of a roll product package according to an embodiment of the present invention. As shown in Fig. 1, 2 to 12 roll products 2, each of which is made of a two-ply sheet of sanitary thin paper wrapped around it, are stored in a packaging bag 10 made of a film 16. The number of roll products 2 stored and the packaging form will be described later.

[0023] (film) The film 16 has a printed portion 19 on a plastic substrate, and is coated with varnish. That is, the film 16 includes a substrate layer (hereinafter also simply referred to as substrate), a printed portion 19, and a varnished layer.

[0024] The material of the base material of the film 16 is preferably a thermoplastic resin (so-called plastic) suitable for recycling. Specific examples include conventionally known thermoplastic resins such as polyolefin (polyethylene, polypropylene, etc.), polyester (PET, etc.), polyamide (nylon, etc.), polycarbonate, polystyrene, polyvinyl chloride, etc. Among these, polyethylene and polypropylene are preferable, and polyethylene is more preferable in terms of stretchability and strength, and linear low density polyethylene (LLDPE) is particularly preferable.

[0025] The amount of varnish applied to the film 16 is 1.3 g / m 2 More than 2.3g / m 2 Less than or equal to 1.5 g / m 2More than 2.1g / m 2 It is preferable that the content is 1.6 g / m or less. 2 More than 2.0g / m 2 It is more preferable that the coating weight of the varnish is 1.3 g / m or less. 2 If the amount of varnish applied is less than 2.3 g / m, the printed portion 19 will have poor abrasion resistance and the ink will easily peel off. 2 If it exceeds this value, the printed portion 19 will have poor peel resistance and the ink will easily peel off. The amount of varnish applied is calculated from the basis weight of the film 16 and the basis weight of the substrate measured before applying the varnish according to the following formula. Note that "basis weight of the substrate measured before applying the varnish" includes only the substrate and the printed portion 19, and does not include the varnish coating layer. Amount of varnish applied = basis weight of film 16 - basis weight of substrate before varnish application The basis weight of the film 16 and the basis weight of the substrate before the varnish is applied are both measured in accordance with JIS P 8124.

[0026] The varnish to form the varnish coating layer is applied so as to cover the printed portion 19 (the printed portion 19 is completely covered by the varnish coating layer). The varnish may be applied narrower than the printed portion 19 (the printed portion 19 may be exposed), but it is preferable to apply the varnish wider than the printed portion 19. The varnish may also be applied to the entire area including areas other than the printed portion 19. In particular, it is more preferable to apply the varnish to the printed portion 19 of the panel portion of the packaging body 10. The amount of varnish applied is considered to be the amount applied per unit of one roll product package. For example, if the area of ​​the printed part 19 is 50% of the area of ​​the film 16, and 1 g / m2 of varnish is applied only to the upper part of the printed part 19, 2 When applied, the amount of application is 1g / m 2 0.5g / m 2 It becomes. The area of ​​the printed portion 19 is preferably 5% to 90% of the area of ​​the panel portion 13a, more preferably 15% to 75%, and even more preferably 20% to 55%. The panel portion 13b may also be printed in the same ratio as the panel portion 13a. The area of ​​the film 16 is the area excluding the bottom surface (the area below the heat seal including the heat seal portion) and the top surface (the area above the handle including the handle portion) in the case of a gable roof type gusset packaging as shown in FIG. 1, for example.

[0027] The varnish preferably contains at least a resin and an auxiliary, and preferably contains 50% by weight or more of polyamide resin among the resin components contained in the varnish, which makes it possible to prevent the ink in the printed portion 19 from peeling off even if the film 16 and the roll product 2 are rubbed against each other. As for the auxiliary, additives such as antistatic agents and antioxidants that are usually contained in varnishes and coating agents can be used without any particular restrictions.

[0028] The basis weight of the film 16 is 16.1 g / m 2 More than 42.6g / m 2 Preferably, the thickness is 19.0 g / m or less. 2 More than 33.1g / m 2 More preferably, it is 22.2 g / m or less. 2 More than 29.0g / m 2 It is more preferable that the basis weight is 16.1 g / m or less. 2 If the basis weight is less than 42.6 g / m, the strength of the film 16 is too low and the film 16 is easily torn not only when loaded onto a truck or during transportation, but also when heat-sealed. 2 If it exceeds this value, the strength of the film 16 will be too high and the heat sealability will be poor. By having the basis weight of the film 16 within the above numerical range, it is possible to obtain a packaging bag 10 and a roll product package 1 that are excellent in heat sealability and difficult to tear.

[0029] The thickness of the film 16 is 20 μm or more and 45 μm or less, preferably 23 μm or more and 35 μm or less, and more preferably 25 μm or more and 30 μm or less. If the thickness is less than 20 μm, the film 16 is too thin and is easily torn not only when loaded onto a truck or during transportation, but also during heat sealing. If the thickness exceeds 45 μm, the film 16 that has been subjected to corona treatment is too thick and has poor heat sealing properties. By setting the thickness of the film 16 within the above range, it is possible to obtain a packaging bag 10 and a roll product package 1 that have excellent heat sealing properties, are not easily torn, and have ink that is not easily peeled off. The thickness of the film 16 can be measured in accordance with JIS K7130.

[0030] Furthermore, the film 16 has a printed portion 19 (and a varnish coating layer) on the inner surface of the packaging bag 10, i.e., the surface opposite to the surface in contact with the outside air, in order to prevent the ink from falling off due to rubbing of the outer surface that occurs during shipping, delivery, carrying the product after purchase, etc. The details of the printed portion 19 will be described later. The film 16 may have other layers in addition to the substrate, the varnish coating layer, and the printed portion 19. Examples of the other layers include a heat seal layer, a water vapor barrier layer, an oxygen barrier layer, a printability improving layer, an overprint layer, and a light shielding layer. These other layers may be provided, for example, on the front or back side of the substrate, and may be one layer or two or more layers.

[0031] The film 16 is corona treated. The above-mentioned structure of the film 16 may make the ink peel off easily, but the reason for this is that the wettability of the film 16 is poor, so the ink peels off easily, and applying varnish over it does not provide a fundamental improvement. Therefore, when the film 16 is stretched or rubbed strongly, the varnish may peel off together with the ink. Therefore, by subjecting the film 16 to a corona treatment, the adhesion and wettability of the ink applied on it is improved, making the ink less likely to peel off. By applying varnish on top of the corona-treated film 16 and ink, it is expected that the effect of preventing the ink from peeling off can be expected. However, since corona treatment may deteriorate the heat sealability, heat sealability can be ensured by keeping the thickness of film 16 within a certain range. (Since corona treatment deteriorates the heat sealability, the temperature during heat sealing must be increased, but if film 16 is thin, it will be more likely to tear during heat sealing. Furthermore, if film 16 is thin, it will be more likely to tear when the roll weight is high. On the other hand, if film 16 is thick, it will have poor heat sealability.)

[0032] (Roll products) The roll product package 1 of the present invention packages 2 to 12 roll products 2. The number of roll products 2 stored is preferably 4, 6, 8 or 12, more preferably 4, 6 or 8, and even more preferably 4. The roll products 2 are preferably packaged in the packaging bag 10 with the axial direction facing up, with two roll products 2 arranged in one or two rows, each layered in two. For example, as shown in FIG. 1, four roll products 2 are packaged in the packaging bag 10 with two roll products 2 arranged in one row, each layered in two rows. The roll product 2 is not particularly limited as long as it is a rolled up two-ply sheet of sanitary thin paper, but is preferably a toilet roll.

[0033] The winding softness of the roll product 2 is 0.4 mm or more and 1.9 mm or less, preferably 0.5 mm or more and 1.5 mm or less, and more preferably 0.6 mm or more and 1.1 mm or less. If the winding softness is less than 0.4 mm, the roll product 2 becomes hard and rubs against the film 16, making the ink more likely to peel off. If the winding softness exceeds 1.9 mm, the roll product 2 becomes too soft and easily loses its shape in the packaging bag 10, resulting in poor compactness.

[0034] The winding softness of the rolled material 2 is measured using a compression tester (handy compression tester KES-G5 manufactured by Kato Tech Co., Ltd.) as follows. The direction parallel to the axis of the rolled material 2 is the height direction, and the direction perpendicular to the tangent to the circumference of the rolled material 2 is the radial direction. First, an acrylic pipe is inserted into the core of the roll product 2. The thickness of the acrylic pipe is 2 mm. The length of the acrylic pipe is 10 mm longer than the roll width of the roll product 2 (if the roll width of the roll product 2 is 114 mm, the length of the acrylic pipe is 124 mm). The outer diameter of the acrylic pipe is slightly smaller than the inner diameter of the core of the roll product 2, and is a size that does not move the roll product 2 under its own weight when the axis of the roll product 2 is placed vertically after the acrylic pipe is inserted. If it is difficult to insert the acrylic pipe into the core and the outer diameter of the acrylic pipe is slightly reduced, the thickness may be slightly scraped off with waterproof paper or the like. The mass of the acrylic pipe is about 32 g when the length is 120 mm and the outer diameter is 38 mm. By inserting the acrylic pipe into the core of the roll product 2, the winding softness of the roll product 2 can be evaluated regardless of the hardness of the core when the winding density is high in the roll product 2 with a long winding length.

[0035] Next, the roll product 2 is laid horizontally on a hard table so that the axis is horizontal. Then, the compression tool (area 2.0 cm) of the KES-G5 is placed at the center of the height direction of the roll product 2. 2 ) is pressed from above in the radial direction at a speed of 10 mm / min. The pressure with which the compression element presses the roll is 5 gf / cm 2 The indentation depth at this time is T0, and the pressure is 150gf / cm 2 The indentation depth at T m As, (T mThe rolling softness is defined as the rolling softness (T0-T0). Measurements are performed at five locations on four rolls, and the results of the measurements at a total of 20 locations are averaged. The height direction when the compression tool is pressed into the roll product 2 does not have to be the center in the height direction, except for both ends in the height direction. In measuring the rolling softness of the roll product 2 of the present invention, the compression tool is pressed into the vicinity of the middle between the center and ends in the height direction of the roll product 2.

[0036] The winding length of the roll product 2 is preferably 70 m or more and 98 m or less, more preferably 75 m or more and 95 m or less, and even more preferably 80 m or more and 90 m or less. If the winding length is less than 70 m, the roll product 2 is not long, and as a result, the loading efficiency and transportability of the roll product package 1 are poor. If the winding length exceeds 98 m, as a result, the winding diameter becomes large, and compactness is poor.

[0037] The roll diameter of the roll product 2 is 90 mm or more and 160 mm or less, preferably 100 mm or more and 140 mm or less, and more preferably 110 mm or more and 125 mm or less. If the roll diameter is less than 90 mm, the roll length is shortened and the roll product 2 is no longer long, resulting in poor loading efficiency and transportability of the roll product package 1. If the roll diameter exceeds 160 mm, the roll product 2 is less compact. By setting the winding length and winding diameter of the roll product 2 within the above ranges, compactness is maintained and the ink on the printed portion 19 of the film 16 is less likely to peel off. As a result, a roll product package 1 with excellent loading efficiency and transportability can be obtained.

[0038] Furthermore, the weight per 114 mm of the roll width of the roll product 2 excluding the core is 200 g or more and 380 g or less, preferably 243 g or more and 328 g or less, and more preferably 262 g or more and 286 g or less. The weight per 114 mm of the roll width of the roll product 2 including the core is preferably 205 g or more and 385 g or less, more preferably 248 g or more and 333 g or less, and even more preferably 267 g or more and 291 g or less. If the weight excluding the core is less than 200 g or the weight including the core is less than 205 g, the roll product 2 is not long due to the shortened winding length, and as a result, the roll product package 1 is inferior in loading efficiency and transportability. If the weight excluding the core exceeds 380 g or the weight including the core exceeds 385 g, the roll product package 1 becomes heavy and rubs against the film 16, making the ink easy to peel off or the film 16 easy to tear.

[0039] The roll width of the roll product 2 is preferably 98 mm to 114 mm, more preferably 103 mm to 112 mm, and even more preferably 106 mm to 110 mm. If the roll width is less than 98 mm, the sheet size becomes small, resulting in poor loading efficiency and transportability of the roll product package 1. If the roll width exceeds 114 mm, the roll product 2 and the roll product package 1 become less compact.

[0040] In addition, the thickness of the 10 sheets (10 sheets for 5 sets since there are 2 plies) used in the roll product 2 is preferably 0.45 mm / 10 sheets or more and 1.20 mm / 10 sheets or less, more preferably 0.60 mm / 10 sheets or more and 0.93 mm / 10 sheets or less, and even more preferably 0.74 mm / 10 sheets or more and 0.85 mm / 10 sheets or less. If the thickness of the sheets is less than 0.45 mm / 10 sheets, the roll density will be low as a result, and the compactness of the roll product 2 will be poor. If the thickness of the sheets exceeds 1.20 mm / 10 sheets, the roll weight will be heavy when a certain winding diameter is achieved, and as a result, the roll product 2 and the film 16 will be easily rubbed, and the ink will be easily peeled off or the film will be easily torn. The thickness of the paper is measured using a thickness gauge (a dial thickness gauge called "PEACOCK" manufactured by Ozaki Manufacturing Co., Ltd.). The measurement conditions are a measurement load of 3.7 kPa and a gauge diameter of 30 mm. The sample is placed between the gauge and the measuring table, and the gauge is read when the gauge is lowered at a speed of 1 mm per second or less. In addition, the thickness of a 100 mm thick sheet of 10 sheets (5 sets of 10 sheets, as it is a 2-ply sheet) is measured. 2 Prepare two bundles and measure each bundle at five equally spaced points for a total of 10 measurements, then average the results.

[0041] Furthermore, the basis weight per ply of the roll product 2 is 10.0 g / m 2 More than 19.0g / m 2 Preferably, the thickness is 12.0 g / m or less. 2 More than 18.0g / m 2 More preferably, it is 14.0 g / m or less. 2 More than 16.0g / m 2 It is more preferable that the basis weight is 10.0 g / m or less. 2 If the basis weight is less than 19.0 g / m, the roll density will be low when wound to a certain length, resulting in a thicker sheet, a larger roll diameter, and poor compactness. 2 If it exceeds this value, the roll weight will become heavy, and as a result, the roll product 2 and the film 16 will be more likely to rub against each other, which will lead to ink peeling and film tearing.

[0042] The outer diameter of the core (cardboard tube) of the roll product 2 is preferably 34 mm to 46 mm, more preferably 36 mm to 43 mm, and even more preferably 38 mm to 41 mm. If the outer diameter of the core is less than 34 mm, when a constant winding diameter is achieved, the winding length becomes long and the roll weight becomes heavy, resulting in the roll product 2 and the film 16 being easily rubbed together, making the ink peeling and the film tearing more likely to occur. If the outer diameter of the core is more than 46 mm, when a constant winding diameter is achieved, the winding length becomes short and the roll product 2 is no longer long, resulting in the roll product package 1 having poor loading efficiency and transportability.

[0043] The weight of the core (paper tube) of the roll product 2 is preferably 3.5 g to 6.0 g, more preferably 4.0 g to 5.3 g, and even more preferably 4.2 g to 4.9 g. If the weight of the core is less than 3.5 g, the core is easily crushed when cutting into the roll product 2, making it difficult to achieve a constant winding length. If the weight of the core is more than 6.0 g, the roll weight becomes heavy, and as a result, the roll product 2 and the film 16 are easily rubbed, making the ink peeling and the film tearing more likely to occur. By setting the outer diameter, basis weight, and weight of the core of the roll product 2 within the above ranges, it is easy to adjust the roll weight to a predetermined value. In addition, the ink in the printed portion 19 of the film 16 is less likely to peel off, and a roll product package 1 with excellent loading efficiency and transportability can be obtained.

[0044] Furthermore, the roll density of the roll product 2 is 0.14 g / cm 3 More than 0.33g / cm 3 It is preferable that the density is 0.17 g / cm or less. 3 More than 0.30g / cm 3 More preferably, it is 0.22 g / cm or less. 3 More than 0.27g / cm 3 It is more preferable that the roll density is 0.14 g / cm or less. 3 If the roll density is less than 0.33 g / cm, the resulting sheet will be thick, the roll diameter will be large, and compactness will be poor. 3 If the thickness exceeds this value, the roll weight will be heavy when a constant winding diameter is maintained, and as a result, the roll product 2 and the film 16 will be more likely to rub against each other, and the ink will be more likely to peel off. By setting the roll density of the roll product 2 within the above range, it is easy to adjust the roll weight to a predetermined value. In addition, the ink on the printed portion 19 of the film 16 is less likely to peel off, and a roll product package 1 with excellent loading efficiency and transportability can be obtained.

[0045] The roll density is calculated by multiplying the base area of ​​one roll product 2 excluding the core by the roll width (height) (i.e., the volume of one roll product 2 excluding the core), and dividing the weight of one roll product 2 excluding the core by this volume. For example, if the roll weight (excluding the core) per 114 mm of roll width is 201 g, the roll diameter is 130 mm, and the outer diameter of the core is 39 mm, the roll density = 201 g ÷ [{3.14 × (130 mm ÷ 2 ÷ 10) 2 -3.14×(39mm÷2÷10) 2}×(114mm÷10)]=0.15g / cm 3 It becomes. At this time, the roll density is measured after maintaining the roll in an equilibrium state under the temperature and humidity conditions specified in JIS P 8111 (23±1° C., 50±2% RH).

[0046] The specific volume of roll product 2 is 3.1 cm 3 / g or more 7.2cm 3 / g or less, and 3 / g or more 6.8cm 3 / g or less is more preferable, and 3 / g or more 6.1cm 3 / g or less. 3 If the specific volume is less than 7.2 cm3 / g, the roll weight becomes heavy, and as a result, the roll product 2 and the film 16 are easily rubbed against each other, which easily causes the ink to peel off and the film to tear. 3 If the tensile strength exceeds 1 / g, the roll density will be low when wound to a certain length, and as a result, the compactness of the roll product 2 will be poor. The specific volume of rolled product 2 is calculated by dividing the thickness of rolled product 2 by the basis weight, and expressing the volume per unit g cm 3 It is expressed as:

[0047] (packaging format) The packaging format of the roll product package 1 according to one embodiment of the present invention is preferably a gusset bag (gusset packaging). 1, the packaging bag 10 has a substantially rectangular parallelepiped main body 11 surrounding the roll product 2, and gripping portions 12 extending upward from opposing long sides of the upper side of the main body 11 in a gable roof shape and joined thereto, and a finger hole 15 is formed in the gripping portions 12. The packaging bag 10 will be described in detail below.

[0048] The packaging bag 10 integrally includes a bottomed cylindrical main body 11 that surrounds the rolled product 2, and a gripping portion 12 that extends continuously upward from the upper end of the main body 11. The gripping portion 12 extends upward from the mutually opposing upper sides 11a and 11c of the upper sides 11a to 11d of the main body 11, respectively, in a gabled roof shape and is joined thereto. Between the upper sides 11a and 11c of the main body 11 and the gripping portion 12, inclined gabled roof-shaped panel portions 13a and 13b are provided. At both ends in the width direction (Y direction) of the panel portions 13a and 13b, mountain folds 14 that become the end edges on the gable side are provided. The gripping portion 12 has a finger hole 15. In this embodiment, the gripping portion 12 has two finger holes 15. Although there may be one finger hole 15, since the thickness of the film 16 of the roll product package 1 of the present invention is thin, it is preferable that there are two finger holes 15 so that the finger hole 15 is less likely to tear. In addition to film 16, a reinforcing film 17 may be further bonded to the periphery of gripping portion 12 in order to reinforce gripping portion 12. The base material of reinforcing film 17 may be the same material as film 16, or may be a material with greater strength.

[0049] The film 16 of the packaging bag 10 is formed into a tube shape (cylindrical shape) before storing the roll product 2. Before storing the roll product 2, the film 16 of the packaging bag 10 is folded symmetrically inwardly as a gusset on both sides in the width direction of the body-side film 16 and folded flat to form a folded edge. In addition, the upper end side of the body-side film 16 is integrated and fixed by heat sealing to form a rectangular flat portion that extends elongated in the width direction, and this flat portion functions as the gripping portion 12. In other words, the width direction (Y direction) of the packaging bag 10 is the longitudinal direction of the gripping portion 12.

[0050] When storing the roll product 2, the main body portion 11 of the main body side film 16 opens downward, and the roll product 2 is stored from below. After the roll product 2 is stored in the main body portion 11 of the main body side film 16 from below, the lower open end of the main body portion 11 is heat sealed to form a sealing portion 18. The gusset of the main body portion 11 of the main body side film 16 unfolds when the roll product 2 is stored, and the main body portion 11 forms a substantially rectangular parallelepiped with a rectangular cross section having four sides, and surrounds the roll product 2. Note that when storing the roll product 2 in the packaging bag 10, after forming the sealing portion 18, the lower end portion of the packaging bag 10 can be appropriately cut as necessary to adjust the dimensions.

[0051] Moreover, the printed portion 19 is preferably disposed on the panel portions 13a and 13b (top portions of the packaging bag 10) from the viewpoints of visibility and ease of rubbing against the roll product 2. The printed portion 19 is formed by printing on a base material with ink and then applying varnish, as described above. The information printed by the printing unit 19 is not particularly limited as long as it is information that needs to be presented to the customer, such as the product name, logo, features, composition, and warnings.

[0052] (Packing and transportation methods) A plurality of roll product packages 1 of the present invention are packed in a cardboard box for transportation. When packing the packages in the cardboard box, preferably two packages are stacked in two or three layers in the height direction, thereby making it possible to provide the roll product package 1 with excellent loading efficiency and transportability while suppressing peeling of the ink. The number of packages in two tiers of a cardboard box is preferably 4 to 20, more preferably 8 to 16, and even more preferably 10 to 14. If the number of packages is less than 4, the empty space inside the cardboard box is too large, making the packages more likely to collide with each other, resulting in the film 16 being more likely to be rubbed and the ink being more likely to peel off. In addition, the loading efficiency and transportability are also poor. If the number of packages exceeds 20, the packages are too close to each other, making the film 16 more likely to be rubbed and the ink being more likely to peel off.

[0053] Although the present invention has been described above using the embodiments, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear to those skilled in the art that various modifications or improvements can be made to the above embodiments. In addition, it is clear from the description of the claims that forms with such modifications or improvements can also be included in the technical scope of the present invention. EXAMPLES

[0054] The present invention will be described in detail below with reference to examples. However, the present invention is not limited to the examples shown below.

[0055] Toilet roll products, wrapping films, and roll product packages of Examples 1 to 21 and Comparative Examples 1 to 9 were produced and packed in cardboard boxes under the conditions shown in Tables 1 to 3. In addition, the toilet roll products, wrapping films, and roll product packages of each Example and Comparative Example were evaluated as follows.

[0056] (Ink peeling (abrasion resistance)) The roll product package was shaken 100 times up and down and left and right, and then the packaging film was opened and the ink peeling from the printed area was evaluated by 30 monitors. The evaluation criteria were as follows: ◎: More than 28 people felt that the ink did not peel off or transfer onto the sheet. Good: Between 25 and 27 people felt that the ink did not peel off or transfer to the sheet. △: 21 to 24 people felt that the ink did not peel off or transfer to the sheet. ×: Fewer than 20 people felt that the ink did not peel off or transfer to the sheet

[0057] (Ink peeling (peeling resistance)) The printed part of the roll product package was pulled and torn, and when the roll product was taken out, 30 monitors evaluated whether the ink had peeled off (come off) and whether the peeled ink had adhered to the sheet and caused color transfer. The evaluation criteria were as follows: ◎: More than 28 people felt that the ink did not peel off or transfer onto the sheet. Good: Between 25 and 27 people felt that the ink did not peel off or transfer to the sheet. △: 21 to 24 people felt that the ink did not peel off or transfer to the sheet. ×: Fewer than 20 people felt that the ink did not peel off or transfer to the sheet

[0058] (Heat sealability) The heat-sealed portion of the roll product package was broken, and the heat-sealing property was evaluated by 30 monitors. The evaluation criteria were as follows: ◎: More than 28 people felt that the heat seal strength was sufficient Good: 25 to 27 people felt that the heat seal strength was sufficient △: 21 to 24 people felt that the heat seal strength was sufficient ×: 20 or fewer people felt that the heat seal strength was sufficient

[0059] (Film tear during heat sealing) The heat-sealed portion of the roll product package was visually inspected to see if there was any tear in the film, and 30 monitors evaluated it. The evaluation criteria were as follows: ◎: More than 28 people felt that the film in the heat-sealed area was torn Good: 25 to 27 people felt that the film in the heat-sealed area was torn △: 21 to 24 people felt that the film in the heat-sealed area was torn ×: Fewer than 20 people felt that the film in the heat-sealed area was torn

[0060] (Film torn) The roll product packages were torn apart at locations other than the heat-sealed areas, and the film's tear resistance was evaluated by 30 test subjects. The evaluation criteria were as follows: ◎: More than 28 people took a long time to tear the film or used too much force. 〇: Between 25 and 27 people took a long time to tear the film or used too much force △: Between 21 and 24 people took a long time to tear the film or used too much force. ×: Fewer than 20 people took a long time or used too much force to tear the film

[0061] (Roll compactness) The compactness of the roll was evaluated based on the roll density of the roll products stored in the prepared roll product package. The evaluation criteria were as follows: ◎: The roll density of the roll product is 0.22 g / cm 3 End Good: The roll density of the roll product is 0.19 g / cm 3 More than 0.21g / cm 3 below △: The roll density of the roll product is 0.14g / cm 3 More than 0.18g / cm 3 below ×: The roll density of the roll product is 0.13 g / cm 3 below

[0062] (Truck loading efficiency and transportability) The roll product packages thus produced were packed in cardboard boxes with the number of packs, number of layers, and number of pieces shown in Tables 1 and 2, and the loading efficiency and transportability of trucks were evaluated. The evaluation criteria were as follows: ◎: The roll weight, roll length, roll diameter, and number of packs packed in a cardboard box were evaluated as being significantly good overall. ○: The roll weight, winding length, winding diameter, and number of packs packed in a cardboard box were evaluated as generally good. △: There were no particular problems with the overall evaluation of roll weight, winding length, winding diameter, and number of packs packed in a cardboard box. ×: The roll weight, roll length, roll diameter, and number of packs packed in a cardboard box were generally poor.

[0063] The above evaluations and the measurement results of each parameter are shown in Tables 1 to 3.

[0064] [Table 1]

[0065] [Table 2]

[0066] [Table 3]

[0067] As is clear from the results shown in Tables 1 to 3, the roll product packages of Examples 1 to 21 all had films with excellent abrasion resistance and peel resistance, making the ink less likely to peel off, good heat sealability, making them less likely to tear, and also excellent in roll compactness, loading efficiency and transportability on a truck. In contrast, Comparative Examples 1 to 9 all had inferior ink peeling from the film, film heat sealability, film tearing, roll compactness, loading efficiency and transportability on a truck. Therefore, according to this embodiment, it was confirmed that the roll product package of the present invention maintains its compactness even when packaging a long roll product, the ink in the printed portion of the film has excellent abrasion resistance and peel resistance and is not easily peeled off, the film has heat sealability and maintains its strength, and further provides a roll product package with excellent loading efficiency and transportability. [Explanation of symbols]

[0068] 1 roll product package 2. Roll product 10 packaging bags 11 Main body 12 Grip part 13a, 13b Panel section 14 Mountain fold ridge 15 Finger hole 16 Film 17 Reinforcement film 18 Sealing part 19 Printing Department

Claims

1. A roll product package comprising a film packaging bag containing 2 to 12 roll products each having a two-ply sheet of sanitary tissue paper wrapped therein, The roll product has a winding softness of 0.4 mm or more and 1.9 mm or less, a winding diameter of 90 mm or more and 160 mm or less, a roll weight (excluding the core) of 200 g or more and 380 g or less per 114 mm of roll width, and a roll density of 0.14 g / cm ３ 0.33g / cm or more ３ is as follows: The film includes a base layer, a printed portion, and a varnished layer, has the printed portion and the varnished layer on the surface opposite to the surface in contact with the outside air, and is subjected to a corona treatment. The film has a thickness of 20 μm or more and 45 μm or less, and the amount of varnish applied is 1.3 g / m. ２ 2.3g / m or more ２ 1. A roll goods package, characterized in that:

2. The number of roll products stored is 4, 6, 8 or 12, The roll product is packaged in the packaging bag with the axial direction facing up, with two or three layers of two rolls arranged in one or two rows, The packaging bag is a cylindrical gusset bag, and has a substantially rectangular parallelepiped main body surrounding the roll product, and handle portions extending upward from opposing long sides of the upper side of the main body and joined to each other in a gable roof shape, The roll product package according to claim 1 , wherein the gripping portion is formed with a finger hole.

3. 2. The roll product package according to claim 1, wherein two packages are stacked vertically in two layers when packed in a corrugated cardboard box.

4. 2. The roll goods package of claim 1, wherein the varnish comprises at least a resin and an auxiliary.

5. 5. The roll product package according to claim 4, wherein the resin components contained in the varnish are polyamide resin in an amount of 50% by weight or more.

6. The roll product package according to claim 1 , wherein the printed portion is disposed on a panel portion of the packaging bag.

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