JP7754266B2 - Rolled materials - Google Patents

Description

The present invention relates to a roll of packaging material in which a sealing material is partially pre-laminated onto a roll of paper material.

2. Description of the Related Art As one type of packaging material, a material in which a sealing material is pre-laminated onto a paper material is known.
For example, as shown in Fig. 12, a roll material 1 is known in which a strip-shaped paper material 2 is wound into a roll and a sealing material such as an adhesive or pressure-sensitive adhesive is pre-laminated on the paper material (see Patent Documents 1 and 2). Also, as shown in Fig. 13, a pattern in which the sealing material 4 laminated on the paper material 2A is provided continuously on one edge S1 in the strip width direction but not on the other edge S2 in the strip width direction is known (see Patent Document 3).

Japanese Patent Application Laid-Open No. 2013-99493 Japanese Patent Application Laid-Open No. 2015-117025 Japanese Patent Application Laid-Open No. 2003-123128

However, as shown in Figure 14, in a roll material 1 in which a paper material laminated with a sealing material in the above-described pattern is wound, the sealing material is provided continuously on one axial edge S1 of the roll but not on the other axial edge S2, or is provided discontinuously. As a result, the thickness of the sealing material differs between the outer diameter d1 of one end of the roll in the axial direction and the outer diameter d2 of the other end of the roll in the axial direction. For example, while a roll material wound with only paper material (shown by a two-dot chain line in Figure 14) has a cylindrical outer shape, a roll material 1 in which the sealing material is provided continuously only on one axial edge S1 of the roll (shown by a solid line in Figure 14) may be distorted, for example, into a truncated cone shape. Such shape distortion may result in wrinkles or kinks in the paper material or poor material feeding, thereby reducing the quality of the roll material.
Therefore, there is room for improvement in ensuring the quality of roll materials.

This invention was conceived with a focus on these issues, and one of its objectives is to ensure the quality of roll materials. However, this objective is not limited to this. Another objective of this invention is to achieve actions and effects derived from the various configurations shown in the "Mode for Carrying Out the Invention" below, which are not available with conventional technology.

The roll material disclosed here is a packaging roll material in which a strip of paper material is wound into a roll, with a sealing material partially laminated on the paper material. This roll material includes a first addition section that is continuously provided around the roll circumferentially along one end edge of the paper material in the roll axis direction, and that adds thickness to the paper material in the roll radial direction by one-end sealing material, which is at least a part of the sealing material that has been pre-laminated on the paper material in the thickness direction; and a second addition section that is continuously provided around the roll circumferentially along the other end edge of the paper material in the roll axis direction, and that adds thickness to the paper material in the roll radial direction by a laminated material that has been pre-laminated on the paper material in the thickness direction.

This will ensure the quality of roll materials.

FIG. 1 is a perspective view of a roll material according to a first embodiment. 2A and 2B are cross-sectional views of the roll material shown in FIG. 1, in which FIG. 2A shows a first embodiment and FIG. 2B shows a modified example thereof. 2 is a front view of a packaging sheet formed from the roll material shown in FIG. 1. FIG. 2 is a perspective view illustrating the outer diameter (winding diameter) of the roll material shown in FIG. 1 . FIG. 4 is a perspective view illustrating a state in which contents are packaged in the packaging paper shown in FIG. 3 . FIG. 10 is a perspective view of a roll material according to a second embodiment. FIG. 7 is a cross-sectional view of the roll material shown in FIG. 6. FIG. 7 is a front view of a packaging sheet formed from the roll material shown in FIG. 6 . FIG. 10 is a cross-sectional view of a roll material according to a modified example of the second embodiment. FIG. 10 is a front view of a packaging sheet formed from a roll material according to a modified example of the second embodiment. 11A and 11B are front views of the packaging paper showing the sealing material layer and the laminated material layer according to the modified example shown in FIG. 10, where (a) shows the sealing material layer and (b) shows the laminated material layer. FIG. 1 is a perspective view of a roll material according to the background art. FIG. 10 is a perspective view of a main part for explaining the problem. FIG. 1 is a perspective view of a roll material illustrating the problem.

A roll material will be described as an embodiment. The roll material is a packaging roll material in which a strip-shaped (also called "web-shaped") sheet of paper material is wound into a roll.
In this embodiment, two embodiments are illustrated. In each embodiment, the roll material is used in a downstream portion of a production line for manufacturing products, where packaging sheets (sheets) are cut to an appropriate length and used to package contents such as products. In each embodiment, an aggregate of multiple toilet rolls is illustrated as an example of the contents to be packaged.

The sealing material for the roll material is partially laminated on the paper material in advance to join and seal the overlapping portions (overlapped portions) and folded portions (folded portions) that will be wrapped together during packaging.
In the following description, the front and back sides of a paper material refer to the side that faces outward after packaging, and the back side refers to the side that faces inward (toward the contents) after packaging. In other words, one of the inside and outside sides of the paper material in the roll radial direction refers to either the front or back side, and the other of the inside and outside sides of the paper material in the roll radial direction refers to the other of the front or back side.
In addition, the packaging form described in the following embodiments includes a clasped packaging (caramel packaging).

[I. First embodiment]
[II. Configuration]
As shown in Figure 1, roll material 11 in this embodiment is a packaging material in which a strip-shaped paper material 12 is wound into a roll. Paper material 12 unwound from roll material 11 is cut to a required length in the longitudinal direction D1 (in the circumferential direction of the roll in the roll form), thereby forming a sheet 13 as shown in Figure 3. This sheet 13 is used to package contents 10 (here, a collection of toilet rolls), as shown in Figure 5.

1 and 2(a), a sealing material layer 14a, in which a sealing material 14 (one-end sealing material) is continuously provided in the roll circumferential direction D1, is pre-laminated on one end edge S1 in the roll axial direction D2 of the front surface F1 of the paper material 12. The sealing material layer 14a illustrated here is disposed in a band-like region that is smaller in dimension in the roll axial direction than the paper material 12.
The sealing material layer 14a is a portion (first addition portion) that adds thickness in the roll radial direction of the paper material 12. Here, an example is given in which the sealing material layer 14a is formed to a predetermined thickness t1. Note that one edge S1 of the front surface F1 of the paper material 12 is the portion that is overlapped and joined facing the back surface F2 of the other edge S2 of the paper material 12 (see FIG. 5).

The sealing material 14 is an adhesive used to join and seal overlapping and folded portions of the packaging. Here, we use an example in which a heat-sensitive sealing material (so-called "hot melt adhesive") that exhibits adhesive properties when heat is applied is used as the adhesive. However, the adhesive used here may also be a pressure-sensitive sealing material that exhibits adhesive properties when pressure is applied.

In addition, a laminate material layer 15a, in which the laminate material 15 is continuously provided in the roll circumferential direction D1, is pre-laminated on the other edge S2 of the front surface F1 of the paper material 12 in the roll axial direction D2. That is, in this embodiment, the sealing material layer 14a and laminate material layer 15a are arranged only on the front surface of the paper material 12 (either the inner or outer side in the roll radial direction of the paper material). The laminate material layer 15a illustrated here is arranged in a band-like region that is smaller in dimension in the roll axial direction than the paper material 12.

The laminated material layer 15a is a portion (second addition portion) that adds thickness in the radial direction of the roll of the paper material 12. This laminated material layer 15a functions as a spacer that increases the winding diameter on the other end edge S2 of the rolled material 11 in response to the increase in the winding diameter (outer diameter) on one end edge S1 of the rolled material 11 caused by the sealing material layer 14a. Here, the laminated material layer 15a is formed to a thickness t2 that is the same as or approximately the same as the thickness t1 of the sealing material layer 14a.
Furthermore, even if the thickness t1 of the sealing material layer 14a and the thickness t2 of the laminated material layer 15a are different, the difference between these thicknesses t1 and t2 (the absolute value of "t1-t2") is assumed to be smaller than the thickness of the paper material 12.

The laminated material 15 illustrated here is an example in which a printing material such as pre-applied ink (a printed layer pre-laminated on the paper material 12) is applied. However, a sealing material similar to the sealing material 14 may also be applied to the laminated material 15 (the other end sealing material). In other words, of the sealing material pre-laminated partially on the paper material 12, all of it may be sealing material 14 of sealing material layer 14a, or it may be a laminated material 15 in which part of it is sealing material 14 of sealing material layer 14a and the other part is a laminated material layer.

The other edge S2 of the front side F1 of the paper material 12, on which the laminated material layer 15a has already been laminated, is overlapped with the one edge S1, on which the sealing material layer 14a has already been laminated, by body bonding in preparation for packaging the caramel. In this overlapped state, the laminated material layer 15a of the other edge S2 is located outside the one edge S1 and is exposed, and will form the external appearance after packaging (see Figure 5).
The sealing material layer 14a and the laminating material layer 15a can be formed by laminating the sealing material 14 and the laminating material 15, respectively, on the front surface F1 of the paper material 22 in advance using known methods such as coating or printing.

[I-II. Actions and Effects]
In the roll material 11 according to this embodiment, not only is a sealing material layer 14a pre-laminated on one end edge S1 of the paper material 12 in the roll axis direction D2, but a laminate material layer 15a is pre-laminated on the other end edge S2 in the roll axis direction D2. Therefore, compared to a roll material in which a sealing material is pre-laminated on only one end edge in the roll axis direction (see the solid line in Figure 14 ), which results in a distorted shape, the difference in outer diameter d between one end and the other end in the roll axis direction D2 is reduced. By reducing distortion of the shape of the roll material 11 in this way, wrinkles and twists in the paper material 12 are also reduced, and feeding problems of the paper material are also reduced. Therefore, the quality of the roll material 1 can be ensured.

The sealing material layer 14a and the laminated material layer 15a illustrated here have the same or almost the same thickness, so that the outer diameter (winding diameter) d of the roll material 11 can be made uniform in the axial direction of the roll, as shown in Fig. 4. For reference, the dashed double-dashed line in Fig. 4 shows the outer diameter (winding diameter) of the roll material without the sealing material layer and the laminated material layer.
In the roll material 11 illustrated in this embodiment, both the sealing material layer 14a and the laminated material layer 15a are arranged only on the front surface F1 of the paper material 12, so these layers 14a, 15a can be provided simply by laminating them from the front surface (one side), which helps reduce manufacturing costs.

Furthermore, when a printed material is used in the laminated material 15 of the laminated material layer 15a, since the laminated material layer 15a is the part that determines the appearance after packaging, the printed material that determines the appearance, such as color or pattern, can be used to prevent the shape of the roll material 11 from being distorted.
Furthermore, when a sealing material is used in the laminated material 15 of the laminated material layer 15a, it is possible to prevent the sealing material layer 14a and the laminated material layer 15a in the paper material 12 unwound from the roll material 11 from coming into contact with or becoming soiled by surrounding equipment, etc., compared to when the laminated material layer is pre-laminated on the back surface F2 of the paper material.

In addition, since a heat-sensitive sealing material is used for the sealing material 14, adhesion of the sealing material 14 to the rolled material 11 is suppressed, and the adhesive function can be exerted simply by heating it during packaging, making it possible to stick the material together during packaging.
Similarly, when a pressure-sensitive sealing material is used for the sealing material 14, the adhesion of the sealing material 14 to the rolled material 11 is suppressed, and the adhesive function can be exerted simply by applying pressure during packaging, making it possible to stick the material together during packaging.

[I-III. Modifications]
In the first embodiment described above, an example was described in which both the sealing material layer 14a and the laminate material layer 15a were disposed on the front surface F1. However, the present invention is not limited to this configuration, and the sealing material layer 14a may be disposed on one of the front surface F1 and the back surface F2 of the paper material 12, and the laminate material layer 15a may be disposed on the other of the front surface F1 and the back surface F2 of the paper material 12.

Specifically, as shown in FIG. 2( b), a sealant layer 14a may be provided on the front surface F1 of one edge S1, and a laminated material layer 15a may be provided on the back surface F2 of the other edge S2. In this case, the back surface F2 of the other edge S2 is not exposed and cannot be seen, so using a printed material on the laminated material 15 would not improve the appearance. Therefore, it is preferable to apply a sealant to the laminated material 15. This configuration allows the sealant layer 14a of the sealant 14 and the laminated material layer 15a formed from the sealant to be bonded together (i.e., the sealants are bonded together). This bonding configuration is suitable for body attachment, preventing unnecessary adhesion of the laminated material layer 15a to the contents and also preventing exposure of the laminated material layer 15a where the sealant is used.
In addition, the lamination arrangement may be reversed from that shown in FIG. 2B, with the sealing material layer 14a provided on the back surface F2 of one edge S1 and the laminate material layer 15a provided on the front surface F1 of the other edge S2.

[II. Second embodiment]
[II-I. composition]
As shown in Figure 6, the roll material 21 of this embodiment also comprises a roll of paper material 22. The paper material 22 unwound from the roll material 21 is cut to the required length in the longitudinal direction D1 (in the circumferential direction of the roll when in roll form) to form individual sheets 23 as shown in Figure 8, and the collection of toilet rolls, which is the contents 10, is packaged in these sheets 23.

6 and 7, a sealing material layer 24a (first added portion) is provided in the roll circumferential direction D1 at one end edge S1 in the roll axial direction D2 of the back surface F2 of the paper material 22, and a sealing material layer 25a (second added portion) is provided at the other end edge S2 in the roll axial direction D2. That is, the sealing material layers 24a, 25a in this embodiment are disposed only on the back surface of the paper material 22 (either the inner or outer side in the roll radial direction of the paper material).
The roll material 21 of this embodiment is also provided with sealing material layers 26a and 27a that are continuously provided in the roll axial direction D2.

The sealing material layers 26a, 27a are provided intermittently in the roll circumferential direction D1, and are portions (third addition portions) that add thickness to the paper material 22 in the roll radial direction by using an adhesive (sealing material) that has been pre-laminate on the paper material 22. That is, the sealing material layers 26a, 27a use a portion of the adhesive (intermittent sealing material) that has been pre-laminate on the paper material 22, excluding the adhesive of the sealing material layers 24a, 25a at the edges S1, S2. These sealing material layers 26a, 27a are arranged so as to connect the sealing material layers 24a, 25a to each other in the roll axial direction D2, and in this example, they are provided in a strip-like shape.
The sealing material layers 24a, 25a, 26a, and 27a can be formed by applying or printing the sealing materials 24, 25, 26, and 27 to the back surface F2 of the paper material 22 in a uniform or approximately uniform thickness, respectively.

As shown in Figure 6, the sealing material layers 26a, 27a, which are continuous in the roll axial direction D2, are provided intermittently in the roll circumferential direction D1 at intervals corresponding to the length required when cutting the paper material 22 in the longitudinal direction D1. As a result, as shown in Figure 8, the sealing material layers 24a, 25a, 26a, 27a are formed in a rectangular shape around the entire outer periphery of each of the four sides of the sheet 23 when viewed from the front.

For example, when the back surface F2 of the other edge S2 of the paper material 22 is overlapped on the outside of one edge S1 of the front surface F1, the sealing material 25 of the sealing material layer 25a provided on the back surface F2 of the other edge S2 is used for body bonding. In this type of packaging, the sealing material 24 of the sealing material layer 24a provided on the back surface F2 of one edge S1 does not contribute to the packaging bonding, but faces the contents when packaged.

Conversely, when the back side F2 of one edge S1 of the paper material 22 is placed outward relative to the other edge S2 of the front side F1, the sealing material 24 of the sealing material layer 24a provided on the back side F2 of the one edge S1 is used to attach the body. In this type of packaging, the sealing material 25 of the sealing material layer 25a provided on the back side F2 of the other edge S2 does not contribute to the packaging bonding, but is packaged facing the contents.

The sealing materials 26 and 27 of the sealing material layers 26a and 27a are used to join and seal the portion where the sheet 23 is folded for caramel packaging.
As in the first embodiment, the sealing materials 24, 25, 26, and 27 forming the sealing material layers 24a, 25a, 26a, and 27a can be heat-sensitive or pressure-sensitive sealing materials. However, the sealing material layers 24a and 25a that do not contribute to the lamination for packaging can be made of any laminated material that adds thickness to the roll diameter direction of the paper material 22, such as the printing material exemplified in the first embodiment, instead of the sealing materials 24 and 25.

[II-II. Actions and Effects]
In the first embodiment of the roll material 11, since no sealing material or laminate material is provided between the sealing material layer 14a and the laminate material layer 15a, the area between these layers 14a, 15a can be shaped like a drum, with an outer diameter smaller than that of the area outside in the axial direction of the roll.
In contrast, in the roll material 21 according to this embodiment, the sealing material layers 24a, 25a are provided on one end edge S1 and the other end edge S2 of the paper material 22 in the roll axis direction D2, and sealing material layers 26a, 27a are also provided that are continuously provided in the roll axis direction D2. Therefore, the outer diameter of the portion of the roll material 21 located between the sealing material layers 24a, 25a is raised by the sealing material layers 26a, 27a, and the difference in outer diameter between this portion and the portion on the outer side of this portion in the roll axis direction can be reduced.

This further reduces distortion of the shape of the roll material 21, further reduces wrinkles and kinks in the paper material 22, and further reduces problems with feeding the paper material. This improves the quality of the roll material 21.
In addition, the same configuration as that of the first embodiment among the configurations of the second embodiment can provide the same functions and effects as those of the first embodiment.

[II-III. Modifications]
In the second embodiment described above, an example has been described in which the sealing material layers 24a, 25a, 26a, and 27a are all provided on the back surface F2 of the paper material 22. However, the present invention is not limited to this configuration, and at least a portion of the sealing material layers 24a, 25a, 26a, and 27a may be provided on the front surface F1.
For example, as shown in Figures 9 to 11, U-shaped sealing material layers 24a, 26a, and 27a may be provided on the front surface F1 of the paper material 22 cut into individual sheets 23, and U-shaped sealing material layers 25a, 26a, and 27a may be provided on the back surface F2 of the paper material 22. In this case, as shown in Figure 11(a), the sealing material layers 24a, 26a, and 27a are arranged in a U-shape on the edges of three of the four sides excluding the other edge S2 when viewed from the front. Also, as shown in Figure 11(b), the sealing material layers 25a, 26a, and 27a are arranged in a U-shape on the edges of three of the four sides excluding one edge S1 when viewed from the front.

With the above-described configuration, as shown in Figure 11, the sheet 23 has sealing material layers 24a, 25a, 26a, and 27a formed in a rectangular shape around the entire outer periphery of all four sides when viewed from the front. In other words, in order to join and seal the folded-in portions at both ends of the contents 10, sealing material layers 26a and 27a are formed on both the front surface F1 and the back surface F2 of the sheet 23. In this way, by providing sealing materials 26 and 27 on both the front surface F1 and the back surface F2 of the sheet 23, the joining and sealing of the folded-in portions can be more reliably achieved.

Regarding the thickness of the sealing material layers 24a, 25a, 26a, and 27a, it is preferable that the double sealing material layers 26a and 27a are formed so that they have the same thickness as the single sealing material layers 24a and 25a.
In addition, in the second embodiment (Figure 8) and its modified example (Figure 11), for the sealing material layers 24a, 25a, 26a, and 27a that do not contribute to packaging bonding or a portion thereof, any laminate material that adds thickness in the roll diameter direction of the paper material 22, such as the printing material exemplified in the first embodiment, can be used.

[III. Other]
Although the embodiments have been described above, the present invention can be practiced by appropriately modifying the configurations of the above embodiments without departing from the spirit of the present invention.
For example, the sealing material layers 26a and 27a described above in the second embodiment may be provided only in necessary regions. Furthermore, it is preferable that the thickness of the sealing material layers 26a and 27a (total thickness in the case of double-sided installation) is equal to or less than the thickness of the sealing material layers 24a and 25a (total thickness in the case of double-sided installation).

Furthermore, in the above embodiment, caramel packaging is used as an example of the packaging form, but the roll material of this invention is not limited to caramel packaging and may be applied to various packaging forms.
The roll material according to the modified example of the second embodiment described with reference to FIGS. 9 to 11 is as follows:
This is suitable for caramel packaging because the seal material 24 (first addition portion) formed by the seal material layer 24a on the front surface F1 and the seal material 25 (second addition portion) formed by the seal material layer 25a on the back surface F2 can be attached to the body of the roll in a face-to-face relationship. The heat-sensitive seal material of the seal material layers 24a, 25a in such a roll material for caramel packaging is used for body attachment by being pressed while heat is applied from the heat source between the heat source that exerts the adhesive function of the heat-sensitive seal material and the contents 10. When this body attachment method is adopted, the amount of heat applied to the heat-sensitive seal material from the heat source tends to decrease as the in-line packaging speed increases. Therefore, by using seal materials 24, 25 attached to the body with the seal material layers 24a, 25a facing each other, the adhesive strength of the body attachment can be ensured even with a reduced amount of heat, thereby improving packaging efficiency (productivity).

Furthermore, in the sealant 26, 27 (third additional portion) of the roll material according to the modified example of the second embodiment described with reference to Figure 10, the sealant layers 26a, 27a laminated on the front surface F1 and the sealant layers 26a, 27a laminated on the back surface F2 are preferably arranged so that they do not overlap each other in a front view (plan view). Specifically, the sealant layers 26a, 27a on the front surface F1 are preferably arranged in stripes intermittently arranged along the roll circumferential direction D1 (i.e., areas without a sealant layer are intermittently arranged along the roll circumferential direction D1), and the sealant layers 26a, 27a on the back surface F1 are preferably arranged in areas that overlap the intermittent areas without a sealant layer on the front surface F1 in a front view. Even if the sealant layers 26a, 27a arranged in this manner are laminated to a thickness equivalent to that of the sealant layers 24a, 25a, the sealant 26, 27 does not have a double thickness (it has a thickness equivalent to that of the sealant 24). This reliably prevents distortion of the shape of the roll material 21, further reduces wrinkles and kinks in the paper material 22, and further reduces problems with the paper material being fed out. This improves the quality of the roll material 21.
In addition, although a collection of toilet rolls has been given as an example of the contents to be packaged, the contents that can be packaged using the paper material of the roll material in this case are not limited to this and can be applied to various other contents.

1, 11, 21 Roll material 12, 22 Paper material 13, 23 Sheet
14, 24, 25, 26, 27 Sealing material 14a, 24a, 25a, 26a, 27a Sealing material layer 15 Laminated material 15a Laminated material layer 2 Paper material D1 Longitudinal direction (roll circumferential direction)
d. Outer diameter (winding diameter) of the roll material 21
D2: Roll axial direction F1: Front surface of paper material 12 (sheet 13) F2: Back surface of paper material 12 (sheet 13) S1: One edge in the roll axial direction D2 S2: Other edge in the roll axial direction D2 t1: Thickness of sealing material layer 14a t2: Thickness of laminated material layer 15a

Claims (5)

A roll material for packaging, in which a strip-shaped sheet of paper material is wound into a roll, and a sealing material is pre-laminated partially on the paper material,
a first adding section that is provided continuously in the roll circumferential direction along one end edge of the paper material in the roll axial direction, and that adds thickness to the paper material in the roll radial direction by an end sealing material that is at least a part of the sealing material that has been pre-laminated in the thickness direction of the paper material;
a second adding section that is provided continuously in the roll circumferential direction along the other end edge of the paper material in the roll axial direction, and that adds thickness to the paper material in the roll radial direction by a laminated material that is pre-laminated in the thickness direction on the paper material;
a third adding section that is provided continuously along the roll axis direction and intermittently in the roll circumferential direction on at least one of the inside and outside in the roll radial direction of the paper material, and that adds thickness to the paper material in the roll radial direction by an intermittent sealing material that is at least a part of the sealing material excluding the one end sealing material that has been pre-laminated in the thickness direction of the paper material;
The first addition portion is disposed on one of the inner side and the outer side in the roll radial direction of the paper material,
the second addition portion adds thickness in the roll radial direction of the paper material by the laminated material including the other end sealing material which is at least a part of the sealing material excluding the one end sealing material, and is arranged on one of the inside and outside of the roll radial direction of the paper material ;
A roll material characterized in that the sealing material is provided only in the first addition portion, the second addition portion, and the third addition portion, and the first addition portion, the second addition portion, and the third addition portion are formed in a square shape in a plan view . 2. The roll material according to claim 1, wherein the sealing material is a heat-sensitive or pressure-sensitive sealing material that exhibits adhesive function when heat or pressure is applied. The roll material according to claim 1 or 2, characterized in that the second adding section adds thickness to the paper material in the roll radial direction by the laminated material including a printed layer pre-laminated on the paper material. 3. The roll material according to claim 1, wherein the second additional portion is made up of only the other end sealing material. 5. The roll material according to claim 1, wherein the third addition portion is arranged on only one of the inner and outer sides of the paper material in the roll radial direction.