JP7600741B2 - Rolled materials - Google Patents

Description

The present invention relates to a roll material for packaging in which a sealing material is partially pre-laminated on 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 on 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 a pressure sensitive adhesive is pre-laminated on the paper material (see Patent Documents 1 and 2). As shown in Fig. 13, a pattern is also known in which the sealing material 4 laminated on the paper material 2A is continuously provided on an edge S1 on one side in the strip width direction, but not on an edge S2 on the other side in the strip width direction (see Patent Document 3).

JP 2013-99493 A JP 2015-117025 A JP 2003-123128 A

However, as shown in Fig. 14, in the roll material 1 in which the paper material laminated with the sealing material is wound in the above-mentioned pattern, the sealing material is provided continuously on one end edge S1 in the roll axis direction, but is not provided or is provided discontinuously on the other end edge S2 in the roll axis direction. Therefore, the thickness of the sealing material differs between the outer diameter d1 on one side in the roll axis direction and the outer diameter d2 on the other side. For example, a roll material in which only the paper material is wound (shown by a two-dot chain line in Fig. 14) has a cylindrical outer shape, whereas the shape of the roll material 1 in which the sealing material is provided continuously only on one end edge S1 in the roll axis direction (shown by a solid line in Fig. 14) may be distorted, for example, into a truncated cone shape. Such distortion of shape may cause wrinkles or twists in the paper material or poor material feeding, which may lead to a deterioration in 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 the only objective. Another objective of this invention is to achieve actions and effects that cannot be obtained with conventional technology, which are derived from the configurations shown in the "Mode for carrying out the invention" described below.

The roll material disclosed here is a packaging roll material 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. This roll material includes a first addition section that is continuously provided in the roll circumferential direction along one end edge of the paper material in the roll axial direction, and adds thickness in the roll radial direction of the paper material by the one-end sealing material that is at least a part of the sealing material pre-laminated in the thickness direction on the paper material, and a second addition section that is continuously provided in the roll circumferential direction along the other end edge of the paper material in the roll axial direction, and adds thickness in the roll radial direction of the paper material by the lamination material pre-laminated in the thickness direction on the paper material.

This case ensures the quality of roll materials.

FIG. 2 is a perspective view of a roll material according to the 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. FIG. 2 is a front view of a wrapping paper 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. 11 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. FIG. 7 is a front view of a wrapping paper formed from the roll material shown in FIG. 6 . FIG. 11 is a cross-sectional view of a roll material according to a modified example of the second embodiment. FIG. 11 is a front view of a packaging paper formed from a roll material according to a modified example of the second embodiment. 11A and 11B are front views of a packaging paper showing a sealing material layer and a laminate material layer according to the modified example shown in FIG. 10, in which (a) shows the sealing material layer and (b) shows the laminate material layer. FIG. 1 is a perspective view of a roll material according to the background art. FIG. 11 is a perspective view of a main part for explaining a 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 are cut to an appropriate length and used to package contents such as products. In each embodiment, an assembly 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 in advance on the paper material in order to join and seal the parts that will be overlapped (overlapped parts) and folded parts (folded parts) 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 in the roll radial direction of the paper material refers to either the front or back side, and the other of the inside and outside in the roll radial direction of the paper material refers to the other of the front or back side.
In addition, the packaging form described in the following embodiments includes a laminated wrapping type packaging (caramel packaging).

[I. First embodiment]
[II. Configuration]
As shown in Fig. 1, the roll material 11 of this embodiment is a packaging material in which a belt-shaped paper material 12 is wound into a roll. The paper material 12 unwound from the roll material 11 is cut to a required length in the longitudinal direction (the circumferential direction of the roll in the case of a roll) D1 to form a sheet 13 in the form of a single leaf as shown in Fig. 3. This sheet 13 is used to package contents 10 (here, a collection of toilet rolls) as shown in Fig. 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 laminated in advance 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 extending region whose dimension in the roll axial direction is smaller than that of 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 end edge S1 of the front surface F1 of the paper material 12 is a portion that is overlapped and joined in a state facing the back surface F2 of the other end edge S2 of the paper material 12 (see FIG. 5).

For the sealing material 14, an adhesive is used to join and seal overlapping and folded parts of the packaging. Here, an example is given in which a heat-sensitive sealing material (so-called "hot melt adhesive") that exerts its adhesive function when heat is applied is used as the adhesive. Note that the adhesive used here may also be a pressure-sensitive sealing material that exerts its adhesive function when pressure is applied.

In addition, the 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 end edge S2 of the front surface F1 of the paper material 12 in the roll axial direction D2. That is, the sealing material layer 14a and the laminate material layer 15a in this embodiment 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 whose dimension in the roll axial direction is smaller than that of the paper material 12.

The laminated material layer 15a is a portion (second addition portion) that adds thickness in the roll radial direction 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 side of the rolled material 11 in response to the increase in the winding diameter (outer diameter) on one end edge S1 side of the rolled material 11 caused by the sealing material layer 14a. Here, the laminated material layer 15a formed to a thickness t2 that is the same or approximately the same as the thickness t1 of the sealing material layer 14a is taken as an example.
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, t2 (the absolute value of "t1-t2") is smaller than the thickness of the paper material 12.

The laminate material 15 illustrated here is an example in which a printing material such as ink that has been applied in advance (a printing layer that has been pre-laminated on the paper material 12) has been applied. However, a sealing material similar to the sealing material 14 may also be applied to the laminate material 15 (the other end sealing material). In other words, of the sealing material that has been pre-laminated partially on the paper material 12, all of it may be sealing material 14 of sealing material layer 14a, or a portion of the sealing material 14 of sealing material layer 14a and the other portion of the laminate material 15 may be sealing material 14 of the lamination 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 as a preparation for packaging the caramel. The laminated material layer 15a of the other edge S2 in this overlapping state is the part located outside the one edge S1 and exposed, and will be the part that defines the appearance after packaging (see FIG. 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, in advance on the front surface F1 of the paper material 22 by 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 only on one end edge in the roll axis direction of the paper material, the difference in outer diameter d between one side and the other side in the roll axis direction D2 can be suppressed. In this way, the distortion of the shape of the roll material 11 is suppressed, and wrinkles and twists in the paper material 12 are also suppressed, and the feeding failure of the paper material can also be suppressed. Therefore, the quality of the roll material 1 can be ensured.

Since the sealing material layer 14a and the laminated material layer 15a illustrated here have the same or almost the same thickness, the outer diameter (wound diameter) d of the roll material 11 can be made uniform in the roll axial direction as shown in Fig. 4. For reference, the two-dot chain line in Fig. 4 shows the outer diameter (wound diameter) of the roll material not including 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 stacking them from the front surface (one side), which helps reduce manufacturing costs.

Furthermore, when a printed material is used in the laminate 15 of the laminate layer 15a, since the laminate layer 15a is the part that determines the appearance after packaging, it is possible to prevent the shape of the roll material 11 from being distorted by using printed material that determines the appearance, such as color or pattern.
In addition, when a sealing material is used in the laminate 15 of the laminate layer 15a, it is possible to prevent the sealing material layer 14a and the laminate 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 laminate 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 roll material 11 wound in a roll shape is suppressed, and the sealing material 14 can be made to exhibit its adhesive function simply by heating it during packaging, making it possible to attach the materials 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 roll material 11 wound in a roll shape is suppressed, and the adhesive function can be exerted simply by applying pressure during packaging, making it possible to attach the material during packaging.

[I-III. Modifications]
In the first embodiment described above, an example in which both the sealing material layer 14a and the laminate material layer 15a are disposed on the front surface F1 has been described. 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 it is difficult to improve the appearance even if a printed material is used for the laminated material 15, so it is preferable to apply a sealant to the laminated material 15. According to this configuration, the sealant layer 14a of the sealant 14 and the laminated material layer 15a formed by the sealant can be bonded (in other words, the sealants are bonded together) and pasted together. This type of bonding is suitable for body attachment, and can avoid unnecessary adhesion of the laminated material layer 15a to the contents, and can also avoid exposure of the laminated material layer 15a using the sealant.
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. Configuration]
As shown in Fig. 6, the roll material 21 of this embodiment also has paper material 22 wound in a roll shape. The paper material 22 unwound from the roll material 21 is cut to a required length in the longitudinal direction (the circumferential direction of the roll when in a roll shape) D1 to form a sheet 23 in the form of a single leaf as shown in Fig. 8, and the collection of toilet rolls, which is the contents 10, is packaged in this sheet 23.

6 and 7, on the back surface F2 of the paper material 22, 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, 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 side or the 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, 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 in the roll radial direction of the paper material 22 by means of an adhesive (sealing material) that has been laminated in advance 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 laminated in advance on the paper material 22, excluding the adhesive of the sealing material layers 24a, 25a at the ends 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 here is an example in which they are extended in a strip 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.

The sealing material layers 26a, 27a, which are continuous in the roll axial direction D2, are intermittently provided 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 shown in Figure 6. As a result, as shown in Figure 8, the sealing material layers 24a, 25a, 26a, 27a are formed in a square shape on the entire outer periphery of the four sides of the sheet 23 when viewed from the front, as shown in Figure 8.

For example, in the case of paper material 22, when one edge S1 of front side F1 is overlapped with the back side F2 of the other edge S2 on the outside, sealing material 25 of sealing material layer 25a provided on the back side F2 of the other edge S2 is used for body bonding. In such a packaging form, sealing material 24 of sealing material layer 24a provided on the back side F2 of one edge S1 does not contribute to the bonding for packaging, but is packaged facing the contents.

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

The sealing materials 26, 27 of the sealing material layers 26a, 27a are used to bond and seal the portion where the sheet 23 is folded for caramel packaging.
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, as in the first embodiment. However, the sealing material layers 24a and 25a that do not contribute to lamination for packaging can be made of any laminate material that adds thickness in the roll radial 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 drum-shaped with an outer diameter smaller than that of the area outside in the roll axial direction.
In contrast, in the roll material 21 according to the present 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 also the sealing material layers 26a, 27a are provided continuously 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 twists 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, the configuration of the second embodiment that is similar to that of the first embodiment can provide the actions and effects described above in the first embodiment.

[II-III. Modifications]
In the above-described second embodiment, 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. 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, the paper material 22 cut into a single sheet 23 may have U-shaped sealant layers 24a, 26a, and 27a on the front surface F1, and U-shaped sealant layers 25a, 26a, and 27a on the back surface F2 of the paper material 22. In this case, as shown in Figure 11(a), the sealant 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 sealant 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.

As a result of the above-mentioned configuration, as shown in FIG. 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 bond and seal the folded-in portions at both ends of the contents 10, the 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 the sealing materials 26 and 27 on both the front surface F1 and the back surface F2 of the sheet 23, the folded-in portions can be more reliably bonded and sealed.

With regard to 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 as to 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 those or parts of the sealing material layers 24a, 25a, 26a, and 27a that do not contribute to the lamination for packaging, any laminate material that adds thickness in the roll radial direction of the paper material 22, such as the printing material given as an example in the first embodiment, can be used.

[III. Others]
Although the embodiment has been described above, the present invention can be practiced by appropriately modifying the configuration of the above embodiment 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 the necessary regions. In addition, the thickness of the sealing material layers 26a and 27a (total thickness in the case of double-sided installation) is preferably equal to or less than the thickness of the sealing material layers 24a and 25a (total thickness in the case of double-sided installation).

In addition, in the above embodiment, caramel packaging is exemplified as the packaging form, but the roll material of the present 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 Figures 9 to 11 is suitable for caramel packaging because it can be attached to the body in a state where the seal material 24 (first addition part) by the seal material layer 24a on the front surface F1 and the seal material 25 (second addition part) by the seal material layer 25a on the back surface F2 face each other. 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 from the heat source to the heat-sensitive seal material tends to decrease as the in-line packaging speed is increased. Therefore, by using the seal materials 24, 25 that are attached to the body in a state where the seal material layers 24a, 25a face each other, the adhesive force of the body attachment can be secured even with a reduced amount of heat, and the packaging efficiency (productivity) can be improved.

Furthermore, the seal material 26, 27 (third addition portion) of the roll material according to the modified example of the second embodiment described with reference to Fig. 10 is preferably arranged so that the seal material layers 26a, 27a laminated on the front surface F1 and the seal material layers 26a, 27a laminated on the back surface F2 do not overlap each other in a front view (plan view). Specifically, the seal material layers 26a, 27a on the front surface F1 are arranged in a stripe shape intermittently arranged side by side along the roll circumferential direction D1 (i.e., areas where the seal material layer is not provided are arranged side by side intermittently along the roll circumferential direction D1), and the seal material layers 26a, 27a on the back surface F1 are preferably arranged in areas that overlap with the areas where the seal material layer is not provided intermittently on the front surface F1 in a front view. Even if the seal material layers 26a, 27a arranged in this way are laminated with a thickness equivalent to that of the seal material layers 24a, 25a, the seal material 26, 27 is prevented from having a double thickness (having a thickness equivalent to that of the seal material 24). This reliably prevents the shape of the roll material 21 from being distorted, further prevents the paper material 22 from being wrinkled or twisted, and further prevents poor feeding of the paper material. 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 to be packaged using the paper material of the roll material of this invention 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 end edge in the roll axial direction D2 S2: The other end edge in the roll axial direction D2 t1: Thickness of sealing material layer 14a t2: Thickness of laminate material layer 15a

Claims (3)

A roll material for packaging, comprising a strip-shaped paper material wound into a roll, and a sealing material pre-laminated partially on the paper material,
a first adding section that is provided continuously in a roll circumferential direction along one end edge of the paper material in the roll axial direction, and that adds thickness in a roll radial direction of the paper material by a one-end sealing material that is at least a part of the sealing material that is pre-laminated in a thickness direction on the paper material;
A second adding section is provided continuously in the roll circumferential direction along the other end edge of the paper material in the roll axial direction, and 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 continuous along the roll axis direction of the paper material and is intermittently provided in the roll circumferential direction , and that adds thickness in the roll radial direction of the paper material 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 a radial direction of the roll 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 disposed on the other of the inside and outside in the radial direction of the roll of the paper material.
A roll material characterized by : 2. The roll material according to claim 1 , wherein the sealing material is a heat-sensitive or pressure-sensitive sealing material that exhibits an adhesive function when heat or pressure is applied. The roll material according to claim 1 or 2 , wherein the second adding section adds thickness in a radial direction of the roll of the paper material by the laminated material including a printed layer pre-laminated on the paper material.

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