Roll body of hygienic thin-leaf paper

Abstract

To make a roll body of sanitary tissue paper compact, to reduce material cost and physical distribution cost, and to reduce a storage space.SOLUTION: A roll of hygienic thin-leaf paper according to the present invention is capable of transitioning between a first state in which the roll has a hollow cylindrical shape and a second state in which the roll has a substantially solid columnar shape.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a roll of sanitary tissue paper. [Background technology]

[0002] BACKGROUND ART Conventionally, laminates of sanitary thin paper such as tissue paper, hand towels, and kitchen towels have been made compact in order to improve the transport efficiency and reduce the storage space required for such laminates.

[0003] For example, Patent Document 1 describes a technology in which a bundle of tissue papers is stored inside a heat-shrinkable binding film, and the heat-shrinkable binding film is heated to shrink the bundle of tissue papers, thereby compressing the bundle into a compact size. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-047270 Summary of the Invention [Problem to be solved by the invention]

[0005] Meanwhile, it is anticipated that there will be demands for compact rolls of sanitary tissue paper to improve transportation efficiency and reduce storage space.

[0006] The present invention aims to provide a package that makes it possible to compact a roll of sanitary tissue paper, thereby reducing material costs, logistics costs, and storage space. [Means for solving the problem]

[0007] The roll of sanitary thin paper according to the first embodiment of the present invention can transition between a first state in which it has a hollow cylindrical shape and a second state in which it has a substantially solid cylindrical shape, and is characterized in that the second state is created by a compressive force in a direction non-parallel to the axis.

[0008] A roll of sanitary thin paper according to a second aspect of the present invention is the roll of sanitary thin paper described in the first aspect, characterized in that the second state is maintained by the compressive force.

[0009] The roll of sanitary thin paper according to the third aspect of the present invention is the one described as the first aspect, characterized in that the second state is produced by compressing the length along the compression direction to 60% or less of the length of the first state.

[0010] In the fourth embodiment of the sanitary thin paper roll of the present invention, in the second state, the density of a predetermined region is 0.19 g / cm 3 More than 0.28g / cm 3 This is described as a first aspect characterized by the following.

[0011] The sanitary thin paper roll body according to the fifth aspect of the present invention is the one described as the first aspect, characterized in that the cross-sectional shape in the second state is approximately rectangular, approximately oval, or approximately elliptical. [Effects of the Invention]

[0012] According to the present invention, the roll body of sanitary tissue paper can be made compact, which in turn reduces material costs, logistics costs, and storage space. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is an overall perspective view of a roll of sanitary thin paper according to one embodiment of the present invention. FIG. [Figure 2] 2A and 2B are front plan views of a roll of sanitary thin paper before and after compression, where (a) shows the roll of sanitary thin paper before compression, and (b) shows the compressed roll of sanitary thin paper shown in FIG. 1. [Figure 3]This is a plan view of a compression device that produces a compressed body of a roll of sanitary tissue paper in one embodiment of the present invention, where (a) is a front view, (b) is a top view, (c) is a bottom view, and (d) is a front view after the target item has been compressed to a second predetermined position. [Figure 4] 3A and 3B are cross-sectional views of a compression device for producing a compressed body of a roll of sanitary thin paper according to one embodiment of the present invention, in which (a) is a cross-sectional view taken along the IVa-IVa direction in FIG. 3A showing the state before compression, and (b) is a cross-sectional view taken along the IVb-IVb direction in FIG. 3D showing the state after compression. [Figure 5] 1A and 1B are plan views of a box body of a compression device for producing a compressed body of a roll of sanitary thin paper in one embodiment of the present invention, where (a) is a top view, (b) is a cross-sectional view in the Vb-Vb direction of (a), and (c) is a cross-sectional view in the Vc-Vc direction of (a). [Figure 6] 1 is a flow chart showing a compression process for producing a compressed body of a roll of sanitary thin paper according to one embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described in detail with reference to Figures 1 to 6. However, the present invention is not limited to this embodiment.

[0015] The target item compressed by the compression device according to the present invention is a roll of sanitary tissue paper, such as kitchen towels or toilet paper. The sanitary tissue paper roll is wound into a roll shape that can be pulled out. In the following embodiment, a case where the sanitary tissue paper is toilet paper and is wound (a roll) (hereinafter also referred to as a "toilet roll") is compressed will be described as an example. In the present invention, taking a toilet roll wound around a paper tube as an example, pressure is first applied to the toilet roll in a direction intersecting the axial direction of the core of the paper tube so that the paper tube is crushed into a straight line. Multiple toilet rolls crushed by this pressure are prepared and compressed using a compression device described below to obtain a compressed toilet roll. The present invention also allows for a configuration in which the paper tube is not crushed. In particular, if a loosely wound product is compressed (pressed) with a high pressure, the texture may change. Therefore, by controlling the pressure, a compressed product may be obtained in which the paper tube is not completely crushed, or by compressing the paper tube until it is closed without applying excessive pressure to the toilet roll.

[0016] In this specification, the terms "top surface" and "bottom surface" refer to the surfaces of the components themselves. However, these terms are used merely for convenience and do not, of course, define absolute positions in the direction of gravity. The same applies to terms such as "upper" and "lower."

[0017] In addition, in the present specification and claims, the term "rectangle" includes not only rectangular shapes but also square shapes, and also includes approximate rectangular shapes and approximate square shapes.

[0018] <Composition of toilet rolls compressed and packaged by a compression device> Figure 1 is an overall oblique view of a group of compressed sanitary thin paper rolls (hereinafter also referred to as "group of compressed sanitary thin paper rolls") 1 according to one embodiment of the present invention, and Figure 2 is a front plan view of the group of compressed sanitary thin paper rolls before and after compression, with Figure 2(a) showing the group of compressed sanitary thin paper rolls 1p before compression and Figure 2(b) showing the group of compressed sanitary thin paper rolls 1 shown in Figure 1.

[0019] The sanitary thin paper roll 11p is, for example, a roll (i.e., a toilet roll) in which toilet paper is wound around a paper tube 111p. Six rolls (2 x 3) are compressed by a compression device 2 described below to form a group of compressed sanitary thin paper rolls 1 as shown in Figures 1 and 2(b). In Figure 2(b), reference numeral 111 represents the paper tube crushed by compression. In the present invention, the number of toilet rolls compressed is not limited to six, and may be one or more other than six. The toilet roll may also be double-wound, for example, with a roll length of 70 m or more and a roll diameter of 100 mm to 134 mm.

[0020] As shown in Figures 1, 2(a), and 2(b), the roll of sanitary thin paper in this embodiment can transition between a first state in which it has a hollow cylindrical shape (see Figure 2(a)) and a second state in which it has a substantially solid cylindrical shape (see symbol 111 in Figure 2(b)), and the second state is created by a compressive force in a direction non-parallel to the axis.

[0021] This configuration allows the sanitary tissue paper roll 11p to be made compact, which in turn reduces material costs, logistics costs, and storage space.

[0022] That is, in this embodiment, the roll of sanitary thin paper can transition between a first state (see Figure 2(a)) in which it has an approximately cylindrical shape and a second state in which the center (paper tube 111p) has an approximately flattened shape (see symbol 111 in Figure 2(b)).

[0023] The roll of sanitary thin paper according to this embodiment is maintained in the second state by compression force.

[0024] In this embodiment, the roll of sanitary thin paper is bent at opposing locations across the axis of the center (paper tube 111p) to assume the second state.

[0025] That is, the core (cardboard tube 111p) may be bent at two points symmetrical about the axis, resulting in a crushed state (see reference numeral 111 in FIG. 2(b)).

[0026] In this embodiment, as shown in Figures 2(a) and 2(b) (and Figures 3(a), 3(d), 4(a), and 4(b) described below), the sanitary thin paper roll 11p is compressed in a direction non-parallel to the axis of the sanitary thin paper roll 11p.

[0027] The sanitary thin paper roll according to this embodiment is produced in the second state by compressing the length along the compression direction to 60% or less of the length in the first state. Details will be described later.

[0028] In the second state, the roll of sanitary thin paper according to this embodiment has a density of 0.19 g / cm 3 in a predetermined region. 3 More than 0.28g / cm 3 The following is the result.

[0029] In this embodiment, the sanitary thin paper roll 11p can transition from an uncompressed state to the first state by pressure acting on predetermined areas that are not parallel to the compression direction and that face each other across the axis.

[0030] That is, the roll body can return to its initial state after being compressed.

[0031] In the roll of sanitary thin paper according to this embodiment, the cross-sectional shape in the second state is generally rectangular, generally oval, or generally elliptical.

[0032] <Compressor configuration> Fig. 3 is a plan view of the compression device 2 that produces a group of compressed rolls of sanitary thin paper 1 according to this embodiment, with Fig. 3(a) being a front view, Fig. 3(b) being a top view, Fig. 3(c) being a bottom view, and Fig. 3(d) being a front view after the group of sanitary thin paper rolls, which are the target articles, have been compressed to the second predetermined position P2. Fig. 4 is a cross-sectional view seen from the side of the compression device 2 that produces a group of compressed rolls of sanitary thin paper 1 according to this embodiment, with Fig. 4(a) being a cross-sectional view taken along the line IVa-IVa in Fig. 3(a) showing the state before compression, and Fig. 4(b) being a cross-sectional view taken along the line IVb-IVb in Fig. 3(d) showing the state after compression. Figure 5 is a plan view of the box body 22 of the compression device 2 that produces a group of compressed rolls 1 of sanitary thin paper according to this embodiment, with Figure 5(a) being a top view, Figure 5(b) being a cross-sectional view taken along the Vb-Vb direction in Figure 5(a), and Figure 5(c) being a cross-sectional view taken along the Vc-Vc direction in Figure 5(a). For ease of explanation, the regulating unit 22, which will be described later, is omitted from Figures 3 and 4. For ease of explanation, the lever 231 of the hydraulic jack 23 is omitted from Figure 4.

[0033] As shown in Figures 3 and 4, the compression device 2 of this embodiment is a device for packaging and compressing a roll 11p (or a group 1p) of sanitary thin paper, and is equipped with a regulating section 22 (see Figure 5) that can regulate displacement in a predetermined direction of the roll 11p when placed at a first predetermined position P1, and a compressor 23 for compressing the roll when placed at the first predetermined position P1 to a second predetermined position P2.

[0034] This configuration allows the sanitary thin paper roll 11p (or group 1p) to be compressed simply and easily, thereby reducing material costs, logistics costs, and storage space.

[0035] The compression device 2 according to this embodiment includes a frame 21 for supporting and fixing a base on which the compressor 23 and the regulating unit 22 are placed, and an upper plate 24 (described later). The support plate on which the regulating unit 22 is installed and supported is fixed to the ram of the compressor 23, and is movable in the vertical direction so as to be raised and lowered by the compressor 23.

[0036] In the present invention, multiple toilet rolls may be set in the restricting portion to obtain a compressed body. When crushed, the toilet rolls may deform so as to expand radially, but by contacting the inner surface of the restricting portion 22, radially outward deformation is restricted. As a result, the toilet rolls in the compressed package are roughly rectangular, minimizing gaps between adjacent toilet rolls and between compressed bodies when stacked side by side, thereby ensuring storage space and improving storability. Note that the compressed toilet roll body may have a roughly oval or elliptical shape with some curved parts.

[0037] In this embodiment, the restricting portion 22 is configured to accommodate a toilet roll, and has a surrounding surface that surrounds the outer periphery of the toilet paper roll 11p in a direction perpendicular to the compression direction. The surrounding surface of the restricting portion 22 restricts the roll 11p from being displaced in a direction perpendicular to the compression direction. By arranging the surrounding portions so that they abut or are close to each other with almost no gaps around the entire circumference of the six rolls 11p arranged in a 2x3 configuration, the space defined by the restricting portion 22 can be formed so that the bottom surface of the restricting portion 22 abuts against the side surface of the roll 11p and is close to the end surface of the roll 11p with no gaps. In addition, in this embodiment, the restricting portion 22 is a box. The box 22 is removable from the compression device 2. In this embodiment, the first predetermined position P1 is the bottom surface of the restricting portion 22 before compression. The second predetermined position P2 is set based on the scale provided on the restricting portion 22, and in this embodiment, it is a position corresponding to the open end of the box body 22. The second predetermined position P2 can also be considered as the position of the bottom of the restricting portion 22 after compression (the third predetermined position) plus the height of the restricting portion 22. In the process of placing the toilet paper roll 11p at the first predetermined position P1 of the restricting portion 22, the restricting portion 22 can restrict displacement of the toilet paper roll 11p in a predetermined direction. By arranging the surrounding portion so that it abuts or is close to the six rolls 11p arranged in a 2x3 configuration over the entire circumference, the rolls can be restricted from displacing in a direction perpendicular to the compression direction. This prevents the rolls from shifting position during compression. In the present invention, the restricting portion 22 may be formed in a shape and size that provides a gap between the rolls.

[0038] The compressor 23 is configured to lift the box body 22 via a support plate that supports the underside of the box body. In this embodiment, the compressor 23 is a hydraulic jack, and by pressing (pumping) the lever 231, the ram rises, lifting the toilet paper roll 11p and sandwiching it with the upper plate 24, compressing the target object in the radial direction of the toilet paper roll 11p. A release valve (not shown) releases the hydraulic pressure to lower the target object, allowing adjustment of the compression of the target object. In the present invention, multiple hydraulic jacks (or cylinders) may be provided. Furthermore, the present invention is not limited to hydraulic jacks, and may also include mechanical jacks (screw jacks, rack-driven jacks), air jacks, etc., or a compressor configured with multiple of these. The compressor 23 compresses the sanitary tissue paper roll 11p so that the radial dimension H2 after compression is 60% or less of the radial dimension H1 before compression (see Figures 2(a) and 2(b)). Compression can be continued until dimension H2 is about 50%, and the compressed toilet roll returns to its original shape to some extent due to its restoring force, so that the texture does not change much compared to the toilet roll before compression and the feel is maintained (see Table 1 and its explanation below). After compression, the center of the roll is flattened, leaving a straight line in the middle, and when the flattened and expanded roll is pressed from both sides, it returns to a circular roll (transitions to the first state).

[0039] As shown in FIG. 3(b), the upper plate 24 is flat and plate-like. The upper plate 24 is sized to cover substantially the entire upper surface of the toilet paper roll group 1p. The present invention is not limited to this, and the upper plate may be smaller than the upper surface of the container. In this embodiment, the upper plate 24 is compressed to a position where it abuts the upper edge of the restricting portion 22 (in this case, the upper plate 24 is configured not to enter the restricting portion 22). The upper plate 24 may also be configured to enter the internal space of the restricting portion 22, in which case the side portion of the roll 11p can be compressed below the upper end of the restricting portion. The compression end position may also be determined by a visible scale, such as a groove carved into the inner peripheral surface of the surrounding portion.

[0040] <Compression using packaging materials> In the present invention, the group of compressed sanitary tissue paper rolls 1 produced (created) by the compression device 2 described above may be produced by first storing the uncompressed sanitary tissue paper rolls 1p in a packaging member (gusset packaging) with a sealed bottom, compressing them against the container, and then degassing the interior of the packaging member using a deaerator (not shown) during or after compression, and then sealing the opening of the packaging member with a sealing means (not shown). In this way, using a packaging member allows the second state of the compressed sanitary tissue paper roll 11 to be maintained. Here, the compressed and packaged sanitary tissue paper roll is also referred to as a compressed sanitary tissue paper roll package (in this embodiment, a compressed toilet roll package).

[0041] The deaerator and sealing means may be any known deaerator or sealer. The deaerator and sealing means may be configured to open and close vertically, for example, and the deaerator has an air intake nozzle that is inserted into the opening of the packaging material to deaerate, and after deaerating, the sealing means sandwiches the opening of the packaging material to seal it, thereby forming a seal in the packaging material and sealing it.

[0042] <Packaging material composition> In the present invention, the material and thickness of the packaging member for storing and compressing and packaging the group of sanitary thin paper rolls can be selected as appropriate as follows.

[0043] The packaging member can be made of a resin material, a biodegradable material (biodegradable plastic such as polylactic acid), a biomass material (biomass plastic), or a film made of a combination of these.

[0044] Examples of resins constituting the film forming the packaging member include polyolefin resins, polyester resins, polyamide resins, polyether resins, acrylic resins, and natural polymer compounds (such as cellulose acetate). These can be used alone or in combination of two or more. Examples of polyolefin resins include polyethylene (PE), polypropylene (PP), and ethylene-vinyl acetate copolymer (EVA). Examples of polyester resins include polyethylene terephthalate (PET) and polyethylene naphthalate (PEN).

[0045] Resins used for the film forming the packaging member may also be polystyrene (PS), polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyamide (PA), etc. Among these, polyethylene, polypropylene, etc. are preferred because they are flexible and easy to handle, have high heat-sealing properties, and are inexpensive.

[0046] It is also preferable to select a resin with high gas barrier properties, but even if a resin with relatively low gas barrier properties is selected, the gas blocking effect can be improved by increasing the film thickness. For example, in the case of polyethylene, a film thickness of less than 40 μm is susceptible to adverse effects due to gas permeation, and the degassed state may be lost, so it is desirable to make the film 40 μm or more.

[0047] In contrast, in the case of a material with high gas barrier properties such as polypropylene, even a thickness of 40 μm can block gas, so the thickness can be set to less than 40 μm.

[0048] However, it is desirable to set the thickness of the film forming the packaging member within the range of, for example, 20 μm to 100 μm. This is because by setting the thickness of the resin film to 20 μm or more, sufficient strength as a packaging member for storing the roll body 11p can be ensured. Furthermore, by setting the thickness of the resin film to 100 μm or less, flexibility and lightness of the packaging member 12 can be ensured.

[0049] Furthermore, the form of the film forming the packaging member is not particularly limited, and may include a single-layer film made of a resin material, a biodegradable material, a biomass material, or the like, a laminate film made by stacking these, a film made by bonding or laminating a resin material, a biodegradable material, and / or a biomass material with pulp paper or a nonwoven fabric, a mixed film made from a mixture of multiple resin materials, etc.

[0050] The packaging form of the packaging member is not limited to gusset packaging, but may be any packaging form that can maintain the degassed state at least after the degassing step. For example, gusset packaging, caramel packaging, pillow packaging, or a combination of these may be used.

[0051] <Density and measurement height of compressed toilet roll packaging before and after compression> Table 1 shows an example of the density and measured height of the compressed and packaged toilet roll before and after compression in the compression device 2, deaerator, and sealing means (hereinafter also referred to as the "packaging device") that produce the compressed and packaged toilet roll according to one embodiment of the present invention.

[0052] The density was calculated by measuring the mass of the toilet roll, finding the volume of the toilet roll (or a roll obtained by compressing it), and dividing the mass by the volume. The volume of the roll (including the toilet roll) here was calculated based on the mass of the roll in the packaging material, the winding diameter and roll width of the roll from above the packaging material, as well as the length in the length, width, and height directions of the compressed roll, and the value obtained by subtracting the thickness of the packaging material from the measured length.

[0053] [Table 1]

[0054] In Table 1, the "initial" state refers to a state before compression and degassing, the "compressed and degassed" state refers to a state after compression and degassing using a packaging device, and the "open" state refers to a state after opening a certain period of time (approximately 10 days) after compression and degassing, allowing air to enter. The "open" state can be used as an indicator of how much the product will return to its original state after opening it after compression and degassing.

[0055] In Table 1, "density" is the density calculated using the method described above, and "height" is the length along the compression direction (height (roll diameter) for unpressurized toilet rolls). Compression reduced the thickness to about half. "Height" can be used as a guide to the state before and after compression. "Density" before and after compression also serves as a guide to the extent to which a compressed toilet roll will return to its original shape after opening.

[0056] Table 2 shows the measurement results of height and density according to the degree of compression of the toilet roll as Examples 1 to 7.

[0057] [Table 2]

[0058] For example, when a roll having a diameter of 11.4 cm is compressed and the length (height) in the direction of compression is reduced, the density increases and the rigidity in directions other than the direction of compression increases, as shown in Table 2. As a result, the roll can withstand external forces during transportation and maintain its shape within the packaging material.

[0059] Furthermore, by reducing the degree of compression and bringing the height closer to the roll diameter, it becomes easier for the center of the roll, which has been crushed and expanded when an external force is applied to the roll after opening, to return to its original cylindrical shape. This also helps to prevent changes in the texture of the sanitary tissue paper due to compression.

[0060] FIG. 6 is a flow chart of a compression process for producing a compressed roll 11 of sanitary thin paper according to this embodiment.

[0061] The compression process by the compression device 2 to produce the compressed roll 11 of sanitary thin paper in this embodiment includes a process of placing the toilet paper roll 11p at a first predetermined position P1 and a process of compressing the roll 11p placed at the first predetermined position P1 to a second predetermined position P2.

[0062] The worker compressing the toilet paper roll 11p first prepares the compression device 2 and prepares to start compression (step S11), then places six toilet rolls 11p on the bottom of the box 22 removed from the compression device 2 (i.e., the first predetermined position P1) (step S12), and places the box 22 on a platform of the frame 21 of the compression device 2 that can be moved up and down by the ram of the compressor 23 (step S13). Next, the toilet paper roll 11p is compressed by the compressor 23 of the compression device 2 (step S14), and the group of compressed toilet rolls 1 shown in Figures 1 and 2(b) is obtained, and the series of processes is completed (step S15). By compressing in this way, sufficient compression and rigidity can be obtained, resulting in a hard (approximately) rectangular parallelepiped, so that multiple compressed toilet rolls 11 can be stacked without shifting.

[0063] Conventionally, efforts have been made to compact sanitary tissue paper stacks in order to improve the transport efficiency of the stacks and reduce storage space. For example, Patent Document 1 describes a technology in which a bundle of tissue paper is stored inside a heat-shrinkable bundling film, and the heat-shrinkable bundling film is heated to shrink the bundle of tissue paper, thereby compressing the bundle into a compact size.

[0064] Meanwhile, it is anticipated that there will be demands for compact rolls of sanitary tissue paper to improve transportation efficiency and reduce storage space.

[0065] According to this embodiment, the sanitary thin paper roll 11p can be made compact, which in turn reduces material costs, logistics costs, and storage space.

[0066] <Other> The present invention is not limited to the above-described embodiments or the modifications described throughout, and appropriate changes and modifications can be made without departing from the technical concept of the present invention.

[0067] For example, in the compression device that produces the roll compressed body according to this embodiment, the object to be compressed may be placed directly on a plate portion that is fixed to and pushed up by the ram of the hydraulic jack 23 without using the box body 22, and compression may be performed according to the scale of a ruler or the like that serves as a regulating portion. In this case, the first predetermined position is the upper surface of the plate portion that is fixed to and pushed up by the ram before compression, and the second predetermined position is the position of the upper surface of the plate portion that is fixed to and pushed up by the ram after compression plus the numerical value on the scale of the ruler or the like. [Explanation of symbols]

[0068] 1. Compressed rolls of sanitary tissue paper 11 Compressed roll of sanitary tissue paper 1p Rolls of sanitary tissue paper before compression 11p Roll of sanitary tissue paper before compression H1 Height of the sanitary tissue paper roll before compression H2 Height of the sanitary tissue paper roll after compression 2. Compression device 21 frames 22 Box body (regulatory part) 23 Compressor 24 Upper plate P1 1st predetermined position P2 2nd predetermined position

Claims

1. A roll of sanitary tissue paper that can transition between a first state in which it has a hollow cylindrical shape and a second state in which it has a substantially solid columnar shape, A roll of sanitary tissue paper, characterized in that the second state is created by a compressive force in a direction non-parallel to the axis.

2. The sanitary tissue paper roll according to claim 1, wherein the second state is maintained by the compressive force.

3. The sanitary thin paper roll according to claim 1, characterized in that the second state is created by compressing the length along the compression direction to 60% or less of the first state.

4. In the second state, the density of the predetermined region is 0.19 g / cm 3 0.28g / cm or more 3 2. The sanitary thin paper roll according to claim 1, wherein:

5. The sanitary thin paper roll according to claim 1, wherein the cross-sectional shape in the second state is a substantially rectangular, a substantially oval, or a substantially elliptical shape.

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