Roll products

Abstract

To provide an environment-friendly gusset package which is used for storing a roll, and can suppress occurrence of opening failure, printing failure and unsealing failure, and pseudo adhesion between a roll and a resin film.SOLUTION: In a roll product 1 obtained by forming a roll 10 by winding a long paper sheet into a roll shape and packaging it in a gusset bag, the gusset bag has a storage part 20 for storing the roll 10, an intermediate part 30 rising from an upper end of the storage part 20, a gusset part 35 located on each side in the width direction of the storage part 20 and the intermediate part 30, a grip part 40 rising from a top portion 32 of the intermediate part 30, and a printed part disposed on a surface of the storage part 20 and / or the intermediate part 30. The gusset bag comprises a resin film. The resin film contains a biomass-derived raw material in an amount of 1 mass% or more to 75 mass% or less with respect to the total raw materials. The resin film has a Young's modulus of 150 MPa or more to 600 MPa or less in the TD direction, a printing area ratio of 20% or more to 95% or less in a gusset part 35, and a gusset ratio of 20% or more to 95% or less.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to roll goods. [Background technology]

[0002] Many roll products, such as toilet rolls and kitchen towel rolls, are commercially available in which a roll of a long paper sheet is wound up and packaged in a gusset package. A gusset package is a product in which a roll is stored in a columnar packaging bag made of a resin film with the upper part remaining, and at the upper part of the remaining part of the packaging bag, one of the opposing resin films is folded inward while the upper end of the other opposing resin film is welded. Due to the current trend of environmental consideration, attempts are being made to use environmentally friendly biomass film as the resin film constituting the packaging bag for the gusset package.

[0003] A biomass film is a resin film obtained from a resin material in which a part or all of a petroleum-derived resin obtained by polymerizing a petroleum-based monomer synthesized from fossil fuels such as petroleum is replaced with a biomass-derived resin obtained by polymerizing a plant-based monomer synthesized from plants such as corn or sugar cane, or from a resin material obtained by polymerizing a petroleum-based monomer and a plant-based monomer. Various proposals have been made regarding biomass resins.

[0004] Patent Document 1 discloses a method for producing an ethylene-butylene copolymer, which comprises synthesizing 1-butylene from a plant raw material via ethanol, ethylene, acetaldehyde, 1-butanol, 3-hydroxy-butanal, crotonaldehyde, 1-butanol, and a butylene isomer mixture (1-butylene and 2-butylene), and polymerizing the ethylene and 1-butylene to obtain an ethylene-butylene copolymer containing 100% renewable, naturally derived carbon (claim 1). Patent Document 1 states that an ethylene-butylene copolymer synthesized from a naturally derived carbon-containing material is provided.

[0005] Patent Document 2 describes a resin composition comprising a biomass-derived polyolefin obtained by polymerizing a monomer containing ethylene and an α-olefin derived from biomass, and a fossil fuel-derived polyolefin obtained by polymerizing a monomer of ethylene and / or an α-olefin derived from a fossil fuel, in which the biomass-derived or fossil fuel-derived α-olefin is butylene, hexene, or octene, the content of the biomass-derived ethylene in the resin composition is 5 mass% or more of the entire resin composition, and the density of the resin composition is 0.91 g / cm 3 More than 0.96g / cm 3 The following resin film has been disclosed. Patent Document 2 describes that there is provided a resin film made of a resin composition containing a carbon-neutral polyolefin using ethylene derived from biomass (paragraph 0022). [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Patent No. 5551605 [Patent Document 2] Patent No. 6020975 Summary of the Invention [Problem to be solved by the invention]

[0007] However, when a biomass film containing a biomass resin as described in Patent Documents 1 and 2 is used for a gusset packaging bag for a toilet roll or a kitchen towel roll, opening defects may occur. For example, there is a defect called blocking in which the inner surfaces of the gusset bag are pseudo-adhered to each other. In addition, the film's adhesiveness increases, so there is a risk of pseudo-adhesion with the contents. In particular, when the contents are long toilet roll products or kitchen towel roll products, the film and the roll are strongly adhered to each other, so this is likely to occur. These problems can be solved, for example, by laminating a normal film onto the biomass film, but this increases the film cost and is not practical. There is also a method of solving the problem by increasing the amount of an anti-blocking agent such as silica added to the film more than usual, but in that case, problems such as printing defects such as ink loss and insufficient heat seal strength occur.

[0008] An object of the present invention is to provide an environmentally friendly gusset package in which a roll is stored in a gusset package and the occurrence of opening defects, printing defects, and opening defects as well as pseudo-adhesion with the contents are suppressed. [Means for solving the problem]

[0009] As a result of intensive research conducted by the inventors to solve the above problems, it was found that a desired roll product as a gusset package can be obtained by setting the ratio of biomass-derived raw materials to the total raw materials of the resin film constituting the gusset packaging bag, the Young's modulus in the TD direction of the resin film, the printing area ratio in the gusset portion, and the gusset ratio within respective predetermined ranges, and thus the present invention was completed. The present invention provides the following roll product.

[0010] (1) A roll product in which a long paper sheet is wound into a roll and packaged in a gusset bag, The gusseted bag has a storage section for storing the roll, a middle section rising upward from an upper end of the storage section, gusset sections located on both sides of the storage section and the middle section in the width direction, a handle section rising upward from a top of the middle section, and a printed section provided on a surface of the storage section and / or the middle section, The gusset bag is configured to include a resin film, The resin film contains biomass-derived raw materials in an amount of 1% by mass or more and 75% by mass or less of all raw materials, The Young's modulus in the TD direction of the resin film is 150 MPa or more and 600 MPa or less, A roll product, wherein the printing area ratio in the gusset portion is 20% or more and 95% or less, and the gusset ratio is 20% or more and 95% or less. (2) The roll product of (1) above, wherein the dynamic friction coefficient of the unprinted inner surface of the gusset bag is 0.01 or more and 0.5 or less. (3) A roll product according to (1) or (2) above, wherein the ratio of the area of ​​the printed portion to the total surface area of ​​the gusset bag excluding the handle portion is 20% or more. (4) The roll product according to any one of (1) to (3) above, wherein the resin film contains polyethylene. (5) The roll product according to any one of (1) to (4) above, wherein the resin film has a thickness of 20 μm or more and 60 μm or less. (6) The roll product according to any one of (1) to (5) above, wherein the resin film has a Young's modulus in the MD direction of 100 MPa or more and 400 MPa or less. (7) A roll product according to any one of (1) to (6) above, wherein the dynamic friction coefficient of the non-printed portion on the surface of the gusset bag where the printed portion is not formed is 0.01 or more and 0.50 or less. (8) The roll product according to any one of (1) to (7) above, wherein the roll is a toilet roll or a kitchen towel roll. Effect of the Invention

[0011] According to the present invention, an environmentally friendly gusseted package is provided which can store a roll and suppresses the occurrence of opening defects, printing defects, and opening defects as well as pseudo-adhesion with the contents. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a perspective view showing a schematic external configuration of a roll product according to an embodiment of the present invention. [Diagram 2] 2 is a schematic perspective view showing the external configuration of a roll packaged in the roll product shown in FIG. 1. [Diagram 3] 1A and 1B are schematic perspective views showing the casette packaging process, and 1C and 1D are schematic cross-sectional views of the gusset portion in the horizontal direction, illustrating the mechanism by which blocking occurs during casette packaging. [Figure 4] FIG. 4 is a schematic horizontal cross-sectional view illustrating how to determine the gusset ratio in the gusset portion. [Diagram 5] Schematic horizontal cross-sectional views illustrating problems that occur depending on the gusset ratio, where (a) shows a case where the gusset ratio is within the specified range, (b) shows a case where the gusset ratio is less than 20%, and (c) shows a case where the gusset ratio is more than 95%. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Roll products> Fig. 1 shows a roll product 1 as a gusseted package according to this embodiment. Fig. 2 shows a roll 10 packaged in the roll product 1. Specific examples of the roll 10 include toilet rolls, kitchen towel rolls, etc. Fig. 4 and Fig. 5 explain the gusset ratio.

[0014] As shown in Fig. 1, the roll product 1 of this embodiment is a gusset packaging bag made of an environmentally friendly resin film, in which four rolls 10, each of which is a long paper sheet wound into a roll, are packaged. The number of rolls 10 packaged in the gusset packaging bag is not particularly limited and may be one or more, but a number of 2, 4, 6, 8, 12, 18, etc. is preferred. In this embodiment, the roll 10 is packaged in the gusset packaging bag so that the axial direction of the roll 10 coincides with the MD direction of the resin film that constitutes the gusset packaging bag.

[0015] The gusset packaging bag of this embodiment is made of an environmentally friendly resin film that contains 1% to 75% by mass of biomass-derived raw materials based on the total raw materials and has a Young's modulus in the TD direction of 150 MPa to 600 MPa. The gusset packaging bag of this embodiment has a gusset portion 35, and the print area ratio in the gusset portion 35 is 20% to 95% and the gusset ratio is 20% to 95%. According to the roll product 1 of this embodiment, which is made of such a resin film and in which the roll 10 is gusset-packaged using a packaging bag having the print area ratio and gusset ratio in the gusset portion 35 in the above-mentioned ranges, the defective rate during packaging can be suppressed in the manufacturing process, and pseudo-adhesion between the contents and the film can be suppressed.

[0016] The present inventors have considered the mechanism by which blocking occurs when biomass fill is used as a resin film in caset packaging as follows. The present inventors' consideration will be explained based on FIG. 3. FIG. 3 is a schematic diagram for explaining the mechanism by which blocking occurs in caset packaging. In general gusset packaging, from the viewpoint of transportation efficiency, etc., a gusset bag 50 is folded in the vertical direction to form a sheet, which is then wound up into a roll and supplied. In the process of FIG. 3(a), a suction pad 51 is placed at a predetermined position of the folded gusset bag 50 and vacuum-suctioned in the vertical direction, and in the process of FIG. 3(b), the gusset bag 50 opens by vacuum suction and rises up and down, so that the gusset bag 50 contains the roll 10, and the bottom surface is welded in a subsequent process (not shown) to obtain a gusset package. FIG. 3(b) shows the state in which the gusset bag 50 is rising up and down before containing the roll 10.

[0017] As shown in FIG. 3(c), the gusset portion 52 has a gusset portion where the resin film is folded inward to form a double gusset, and in the folded state, the resin film (biomass film) is more closely attached to the gusset portion 52 than to other portions of the gusset packaging bag 50. Furthermore, since the biomass film exhibits adhesiveness, the two overlapping biomass films of the gusset portion 52 are easily pseudo-adhered in the gusset bag 50 before it is folded and vacuum-suctioned. In the pseudo-adhered state, the packaging machine does not properly open the bag by vacuum suction, resulting in a high defect rate. In addition, a gusset package packaged with the biomass film of the gusset portion 52 still pseudo-adhered has a poor appearance, and when the gusset package is opened to remove the roll 10, the roll 10 pseudo-adheres to the resin film, and problems such as tearing of the paper sheet wound around the roll 10 are likely to occur. That is, according to the research of the present inventors, the reason why the gusset package is prone to opening defects, packaging defects, opening defects, etc. is believed to be due to a complex combination of the special structure of the gusset packaging bag 50 (the portion where the resin film of the gusset portion 52 is folded over), the sheet-like form of the gusset packaging bag 50 when delivered, and the biomass film. In this embodiment, the problem is successfully solved by using a biomass film having predetermined characteristics and setting the print area ratio and gusset ratio in the gusset portion within predetermined ranges.

[0018] The structure of the gusset bag, the properties of the resin film that constitutes the gusset bag, the features of the gusset portion, etc. will be described below.

[0019] <Gusset bag structure> As shown in FIG. 1, the gusseted bag of this embodiment has a storage section 20, an intermediate section 30, a gusset section 35, a handle section 40, and a printed section (not shown). The storage section 20 is configured in a cylindrical shape to store the roll 10, and the bottom surface is welded. The intermediate section 30 connects the upper end of the storage section 20 and the lower end of the handle section 30, and has two slope sections 31 and a top section 32. The two slope sections 32 are inverted V-shaped regions in cross section in which one opposing resin film at the top of the storage section 20 is folded inward and the other opposing resin film at the top of the storage section 20 is raised obliquely upward so as to be continuously close to each other, and have a gusset section 35b as a gusset section where the resin films overlap on both sides in the width direction. The top section 32 is a region where the upper ends of the two slope sections 31 are joined. The handle portion 40 rises upward from the top 32 of the middle portion 30 and extends horizontally in a band shape. The handle portion 40 has a perforation 42 extending widthwise through the approximate center of the lengthwise direction to assist in opening the roll product 1, and two finger insertion holes 41 extending lengthwise and facing each other across the perforation 42. The gusset portion 35 is connected to the storage portion 20, the middle portion 30, and the handle portion 40, and in the storage portion 20, it is both side surfaces 35a in the direction in which the resin film in the middle portion 30 is folded inward, in the middle portion 30, it is an area 35b in which the resin film is folded inward and doubled, and in the handle portion 40, it is an area 35c in which the resin film on both sides in the widthwise direction is doubled. The printed portion is a single-color or multiple-color character, a picture, a combination thereof, a mark, or the like provided on the inner surface of the gusset bag.

[0020] <Resin film> The resin film is obtained, for example, by forming a thermoplastic resin obtained by polymerizing a polymerizable monomer into a film. The raw material for the polymerizable monomer includes petroleum-based raw materials and plant-based raw materials such as corn and sugarcane. In the present invention, a polymerizable monomer synthesized from a petroleum-based raw material is called a non-biomass raw material, and a polymerizable monomer synthesized from a plant-based raw material is called a biomass raw material. An example of the resin film of this embodiment is a blend of a biomass-based resin material obtained by polymerizing a biomass raw material (polymerizable monomer) and a petroleum-based resin material obtained by polymerizing a non-biomass raw material (polymerizable monomer).

[0021] Examples of the thermoplastic resin include polyethylene, polypropylene, polyester, polyethylene terephthalate, polyamide, polyvinylidene chloride, ethylene-vinyl alcohol copolymer, etc. Among these, polyethylene, polypropylene, polyvinylidene chloride, ethylene-vinyl alcohol copolymer, etc. are preferred, polyethylene, polypropylene, etc. are more preferred, and polyethylene is even more preferred from the viewpoint of ease of adjusting each parameter described below. The material of the resin film preferably contains polyethylene, more preferably contains 50 mass% or more of polyethylene as a whole, and even more preferably consists of polyethylene only.

[0022] (Proportion of biomass-derived raw materials) The resin film of the present embodiment contains, for example, a biomass-based resin material and a petroleum-based resin material. The content of the biomass-derived raw material in the resin film is in the range of 1% by mass to 75% by mass, preferably 3% by mass to 50% by mass, more preferably 5% by mass to 25% by mass, of the total resin material (total raw materials) including the biomass-based resin material and the petroleum-based resin material. If the content of the biomass-derived raw material is less than 1% by mass, it is difficult to say that the resin film is environmentally friendly. If the content of the biomass-derived raw material exceeds 75% by mass, the adhesion of the resin film surface increases, and blocking in the middle portion 30 tends to occur easily. The content of the biomass-derived raw material is measured by the ASTM D6866 method.

[0023] (Young's modulus in TD direction) The Young's modulus of the resin film in the TD direction is in the range of 150 MPa to 600 MPa, preferably in the range of 200 MPa to 500 MPa, more preferably in the range of 250 MPa to 400 MPa. If the Young's modulus in the TD direction is less than 150 MPa, the resin film is too soft during gusset packaging, and a gap is likely to occur between the suction pad 51 and the resin film, which makes it difficult to suck with a vacuum, and opening defects tend to occur. If the Young's modulus in the TD direction exceeds 600 MPa, the gusset packaging bag is difficult to expand and does not sufficiently follow the shape of the roll 10, which is the content, and packaging defects tend to occur.

[0024] (MD Young's modulus) In a preferred embodiment, the Young's modulus in the MD direction of the resin film is, for example, in the range of 100 MPa to 400 MPa, 120 MPa to 350 MPa, or 180 MPa to 300 MPa. If the Young's modulus in the MD direction is less than 100 MPa, the resin film is too soft during gusset packaging, and a gap is likely to occur between the suction pad 51 and the resin film, and the resin film cannot be sucked by vacuum, which tends to cause opening defects. If the Young's modulus in the MD direction exceeds 400 MPa, the gusset packaging bag is difficult to spread and does not sufficiently follow the shape of the roll 10, which is the content, and packaging defects tend to occur. The Young's modulus in the TD direction and MD direction of the resin film can be measured in accordance with JIS K 7161-1:2014.

[0025] (Kinematic friction coefficient of inner surface of gusset bag) In another preferred embodiment, the dynamic friction coefficient of the unprinted region (unprinted portion) of the inner surface of the resin film is, for example, in the range of 0.01 to 0.5, 0.05 to 0.4, or 0.1 to 0.3. Here, the inner surface of the resin film is the inner surface facing the roll 10 in the gusset bag. If the dynamic friction coefficient is less than 0.01, heat transfer becomes insufficient during heat sealing, and sealing failure tends to occur. If the dynamic friction coefficient exceeds 0.5, the inner surfaces (unprinted smooth surfaces) of the resin film tend to adhere to each other and pseudo-adhere, and blocking tends to occur. The dynamic friction coefficient of the resin film can be measured in accordance with JIS K 7125 1999.

[0026] (Inner surface area ratio of printed area) In another preferred embodiment, a printed portion (not shown) is provided on the outwardly facing surface of the storage section 20 and / or the intermediate section 30. The ratio of the area of ​​the printed portion to the total surface area of ​​the gusset bag excluding the handle section 40, i.e., the total area of ​​the inwardly facing surfaces of the storage section 20 and the intermediate section 30 (hereinafter also simply referred to as the "area ratio of the inner surface printed portion") is in the range of 20% or more, 30% or more, or 40% or more. If the area ratio of the inner surface printed portion is less than 20%, the printed portion is not formed on the resin film constituting the gusset bag, and the inner surface on which no ink is present is sticky, so that the roll 10 and the inner surface of the resin film constituting the gusset bag are pseudo-adhered to each other, and the sheet tends to tear when the roll 10 is taken out of the gusset bag.

[0027] (Thickness) In yet another preferred embodiment, the thickness of the resin film is, for example, in the range of 20 μm to 60 μm, 23 μm to 50 μm, or 25 μm to 40 μm. If the thickness is less than 20 μm, the rigidity of the resin film, including Young's modulus, decreases, and the resin film becomes too soft, which tends to cause a gap between the suction pad 51 and the resin film, and the adhesiveness of the resin film is stronger than the vacuum suction during gusset packaging, which tends to cause insufficient opening of the gusset packaging bag and prone to packaging defects. If the thickness exceeds 60 μm, the heat transfer during heat sealing becomes insufficient, which tends to cause sealing defects. The thickness of the resin film can be measured in accordance with JIS K 7130:1999.

[0028] (Kinematic friction coefficient of non-printed outer surface) In yet another preferred embodiment, the dynamic friction coefficient of the resin film of the non-printed portion on the outer surface (outer surface facing outward) of the gusset bag is, for example, in the range of 0.01 to 0.5, 0.05 to 0.4, or 0.1 to 0.3. If the dynamic friction coefficient is less than 0.01, the gusset bag will slip due to the vacuum applied when opening, leading to insufficient opening of the gusset bag and a tendency for defective packaging to occur. If the dynamic friction coefficient exceeds 0.5, blocking, in which smooth surfaces come into close contact with each other, tends to occur when the roll product 1 is packed in a cardboard box or the like for transportation, which tends to reduce the commercial value of the roll product 1. The dynamic friction coefficient of the resin film can be measured in accordance with JIS K 7125 1999.

[0029] <Gazette section> As described above, the intermediate portion 30 is composed of two inclined portions 31 and a top portion 32. One end of each of the two inclined portions 31 rises from one of the opposing upper ends of the storage portion 20 of the gusset bag, and the two inclined portions 31 approach each other toward the top, and the other end is joined at the top portion 32, and the other opposing resin film of the storage portion 20 is folded inward to form a gusset portion 35b in which the resin films overlap. The side surface of the storage portion 20 on which the resin film is folded is the gusset portion 35a, and the region where the resin films on both sides of the handle portion 40 in the width direction overlap is the gusset portion 35c. In this way, the gusset portion 35 extends from the storage portion 20 (gusset portion 35a) through the intermediate portion 30 (gusset portion 35b) to the handle portion 40 (gusset portion 35c). Each of the two inclined surfaces 31 has an outer surface facing the outside and an inner surface facing the top surface of the storage section 20. On the outer surface and / or the inner surface, a printed portion made of single or multiple color ink and including letters, pictures, combinations thereof, marks, etc. is provided as necessary.

[0030] (Printing area ratio and gusset ratio) The gusset portion 35 (here, the sum of the gusset portion 35a in the storage portion 20 and the gusset portion 35b in the middle portion 30) has a print area ratio in the range of 20% to 95%, preferably in the range of 30% to 95%, and more preferably in the range of 40% to 95%, and the gusset ratio is in the range of 20% to 95%, preferably in the range of 30% to 95%, and more preferably in the range of 40% to 95%. Here, the print area ratio refers to the percentage (%) of the total area of ​​the printed portions provided on the gussets 35a, 35b to the total area of ​​the storage portion 20 and the middle portion 30, or the percentage of the total area of ​​the printed portions to the total area of ​​the gusset bag (excluding the handle portion 40).

[0031] A horizontal cross-sectional view of the gusset portion 35b shown in Fig. 4 is shown. In the gusset bag, the resin film AB located on the outside overlaps the resin film AF folded inward to form a gusset portion that is the gusset portion 35b. The other three gusset portions 35b are also gusset portions in which the resin film is overlapped twice on the outside and inside. In Fig. 4, the gusset rate (%) is expressed as (length of side AF + length of side EF + length of side BC + length of side CD) ÷ (length of side AB + length of side DE) × 100.

[0032] The reason why the gusset ratio is set to 20% or more and 95% or less will be described with reference to Fig. 5. When the gusset ratio is within the above-mentioned range, as shown in Fig. 5(a), the sides AF and EF are of appropriate length (the distance between the folds A, E, and F is of appropriate length), and the resin film has room to expand even when the roll 10 is stored in the gusset bag, so the resin film is very unlikely to tear, and the same is true for the folds B, C, and D. When the gusset ratio is less than 20%, as shown in Fig. 5(b), the distance between the folds A, E, and F and the distance between the folds B, C, and D become too short, so that when the roll 10 is stored in the gusset bag, a relatively large stress is required for the resin film to expand, and the resin film tends to tear easily when opening by suction and when packaging. On the other hand, if the gusset ratio exceeds 95%, as shown in Figure 5(c), when there is variation in the folding inward of the resin film, the folds C and F become very close to each other, which tends to cause pseudo-adhesion, and as a result, blocking tends to occur easily when the film is opened.

[0033] <role> The roll 10 to be packaged in the gusset bag is a long paper sheet 2 wound into a roll shape as shown in Fig. 2, where the reference numerals "21a" and "21b" respectively indicate the front and back sides of the sheet 2. In this embodiment, the roll 10 is a toilet roll, a kitchen towel roll, etc. The dimensions of the toilet roll and the kitchen towel roll are not particularly limited and are appropriately selected according to the paper quality of the sheet 2, so the dimensions of the gusset bag can be selected according to these dimensions.

[0034] For example, the basis weight of a toilet roll is 16 g / m for a one-ply product. 2 More than 24g / m 2 Below range, 17g / m 2 More than 23g / m 2 Below range, 18g / m 2 More than 22g / m 2 The range is as follows: for example, for a 2-ply product, 12 g / m 2 More than 19g / m 2 Below range, 13g / m 2 More than 18g / m 2 Below range, 14g / m 2 More than 17g / m 2 The roll length is, for example, in the case of a one-ply product, 75 m or more and 130 m or less, 75 m or more and 120 m or less, or 75 m or more and 101 m or less, and in the case of a two-ply product, 37.5 m or more and 90 m or less, 37.5 m or more and 85 m or less, or 37.5 m or more and 76 m or less, the roll diameter DR is, for example, in the range of 100 mm or more and 140 mm or less, 107 mm or more and 135 mm or less, or 112 mm or more and 120 mm or less, and the core outer diameter DI can be appropriately selected. As an example of a kitchen towel roll, the basis weight is, for example, 16 g / m 2 More than 24g / m 2 Below range, 17g / m 2 More than 23g / m 2 Below range, 18g / m 2 More than 22g / m 2 The winding length is, for example, in the range of 15 m or more and 40 m or less, in the range of 21 m or more and 35 m or less, or in the range of 25 m or more and 31 m or less, the winding diameter DR is, for example, in the range of 113 mm or more and 180 mm or less, in the range of 135 mm or more and 170 mm or less, or in the range of 140 mm or more and 160 mm or less, and the core outer diameter DI can be selected as appropriate.

[0035] 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 and examples. It is clear to those skilled in the art that various modifications and 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

[0036] The present embodiment will be described more specifically below with reference to examples and comparative examples.

[0037] <Examples 1 to 15 and Comparative Examples 1 to 8> Gusset bags made of resin films having the properties shown in Tables 1 and 2 were produced and subjected to the following evaluations. The results are shown in Tables 1 and 2. In Example 4, a resin film made of 90 mass % polyester resin and 10 mass % polypropylene resin was used, in Example 5, a resin film made of 60 mass % polyester resin and 40 mass % polypropylene resin was used, in Comparative Example 2, a resin film made of 30 mass % polyester resin and 70 mass % polypropylene resin was used, and in Comparative Example 3, a resin film made of 75 mass % polyester resin and 25 mass % polypropylene resin was used.

[0038] <Evaluation method> (Difficulty in blocking) A test piece was cut to a width of 50 mm and a length of 70 mm, a plate weighing 10 kg with a larger base area than the test piece was placed on top of it, and the piece was left to stand for 72 hours in a thermostatic chamber at 40°C. After the test piece was removed from the thermostatic chamber and cooled to room temperature, it was peeled off at a speed of 300 mm / min using a tensile tester, and the maximum peel strength (N / 50 mm) and the presence or absence of peeling sound were evaluated according to the following criteria. ◎ Not bonded, peel strength measurement impossible (0N / 50mm) ○ No peeling noise, peel strength is 3N / 50mm or less △ No peeling noise, peel strength is 3~6N / 50mm × Peeling noise occurs or peel strength is 7N / 50mm or more

[0039] (Difficulty in opening) The frequency of opening failures when packaging 1,000 packs using a packaging machine was measured and evaluated according to the following criteria. ◎ No opening failure (0 times) ○ Poor opening occurs 1 to 5 times △ Poor opening occurs 6 to 9 times × Poor opening occurs 10 or more times

[0040] (Printing aesthetics) The presence or absence of ink bleeding was visually observed and evaluated according to the following criteria. ◎ No ink loss on each packaging film ○ 1 to 2 ink holes per packaging film △: 3 to 4 ink holes per packaging film ×: Four or more ink holes on one packaging film

[0041] (Seal strength) The toilet roll gusset packaging was held with the fingers hooked around the handle and swung up and down (the swing was performed at a speed of 2 swings per second with a stroke of 10 cm) to count the number of swings until the handle broke and evaluate it according to the following criteria. ◎ Will not break even after 100 or more operations ○ Breaks after 50 to 99 operations △ Breaks after 21 to 49 uses × Breaks within 20 times

[0042] [Table 1]

[0043] [Table 2]

[0044] As can be seen from Tables 1 and 2, by using a resin film having the configuration of this embodiment, even if the resin film contains a biomass-based resin material, the occurrence of printing defects, opening defects, and unsealing defects, as well as pseudo-adhesion between the roll and the resin film, are significantly suppressed, and an environmentally friendly and excellent roll product can be obtained. [Explanation of symbols]

[0045] 1 roll product 10 rolls 20 Storage area 30 Middle Section 31 Slope 32 Top 35, 35a, 35b, 35c Gusset section 40 Handle 41 Finger insertion hole 42 Perforation 50 Gusseted Bag 51 Suction Pad 52 Gazette Department 53 Printing Department

Claims

1. A roll product in which a long paper sheet is wound into a roll and packaged in a gusset bag, The gusset bag has a storage section for storing the roll, a middle section rising upward from an upper end of the storage section, gusset sections located on both sides of the storage section and the middle section in the width direction, a handle section rising upward from a top of the middle section, and a printed section provided on a surface of the storage section and / or the gusset section, The gusset bag is configured to include a resin film, The resin film contains biomass-derived raw materials in an amount of 1% by mass or more and 75% by mass or less of all raw materials, The Young's modulus of the resin film in the TD direction is 150 MPa or more and 600 MPa or less, and the Young's modulus in the MD direction is 100 MPa or more and 400 MPa or less, A printing area ratio in the gusset portion is 20% or more and 95% or less, and a gusset ratio is 20% or more and 95% or less, A roll product, wherein the dynamic friction coefficient of a non-printed portion on the surface of the gusset bag where the printed portion is not formed is 0.01 or more and 0.50 or less.

2. 2. The roll product of claim 1, wherein the coefficient of dynamic friction of the unprinted inner surface of the gusseted bag is 0.01 or greater and 0.5 or less.

3. 3. The roll product according to claim 1, wherein a ratio of an area of ​​the printed portion to a total surface area of ​​the gusset bag excluding the handle portion is 20% or more.

4. The roll product according to claim 1 , wherein the resin film contains polyethylene.

5. The roll product according to claim 1 , wherein the resin film has a thickness of 20 μm or more and 60 μm or less.

6. 6. The roll product of claim 1, wherein the roll is a toilet roll or a kitchen towel roll.

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