Bubble-processed cushioning paper bag body

Abstract

This invention provides an environmentally friendly, renewable foam-processed paper cushioning bag that can function as a cushioning bag with the same cushioning effect as a cushioning bag using a plastic foam sheet with internal air bubbles as an inner lining. [Solution] The bag 10A is made of foam-processed cushioning paper 12 on which foam-like uneven surfaces 26 are formed by embossing, and has a main body 14 with an opening 16 formed at the top and a bottom 20 at the bottom, and a lid 18 formed at the opening. The foam diameter of the foam-like uneven surfaces is 4 mm to 20 mm, and the height of the foam is 1 mm to 6 mm.

Description

Technical Field

[0001] The present invention relates to a foamed processed buffer paper bag body composed of a foamed processed buffer paper in which foamed uneven portions are formed on stretchable paper by embossing.

Background Art

[0002] Conventionally, as an example of a bag body, a buffer envelope having a plastic bubble sheet as an inner sheet as shown in Patent Document 1 is known.

[0003] However, when such a buffer envelope is discarded after use, it is necessary to remove and separate the plastic bubble sheet, which is troublesome for disposal. In recent years, there has been a demand for a buffer envelope that takes environmental considerations in order to comply with SDGs.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made in view of the above-described problems of the prior art, and can serve as a bag body having a buffering effect similar to a buffer bag body having a plastic bubble sheet having bubbles inside as an inner sheet, and an environmentally friendly and recyclable foamed processed buffer paper bag body is provided.

Means for Solving the Problems

[0006] In order to solve the above problems, the foamed processed buffer paper bag body according to the present invention is a bag body composed of a foamed processed buffer paper in which foamed uneven portions are formed by embossing, and has an opening formed at the upper part and a main body part having a bottom at the lower part, and a lid part formed at the opening, and is a foamed processed buffer paper bag body.

[0007] Preferably, the diameter of the bubbles in the foamy, uneven portion is between 4 mm and 20 mm.

[0008] It is preferable that the diameter of the bubbles in the aforementioned foamy uneven portion is 12 mm.

[0009] Preferably, the height of the bubbles in the foamy, uneven portion is 1 mm to 6 mm.

[0010] The basis weight of the aforementioned foamed cushioning paper is 30 g / m². 2 ~200g / m 2 It is preferable that this be the case.

[0011] Preferably, an adhesive tab is formed on the lid, and the adhesive tab is glued.

[0012] Preferably, a gusset that can expand the storage space of the main body is formed on the bottom and / or side of the main body.

[0013] Preferably, a smooth paper is attached to the outside of the foam-processed cushioning paper, resulting in a two-layer structure with the foam-processed cushioning paper on the inside and the smooth paper on the outside.

[0014] Preferably, the foam-processed cushioning paper is sandwiched between two smooth sheets of paper, with a smooth sheet of paper attached to the outside of the foam-processed cushioning paper and another smooth sheet of paper attached to the inside of the foam-processed cushioning paper, forming a three-layer structure.

[0015] It is preferable that the foam-processed cushioning paper bag is an envelope. [Effects of the Invention]

[0016] According to this invention, a cushioning bag can function as a bag with a cushioning effect similar to a cushioning bag using a plastic bubble sheet with internal air bubbles as the inner lining, and it has the significant advantage of providing an environmentally friendly, renewable foam-processed cushioning paper bag. [Brief explanation of the drawing]

[0017] [Figure 1] It is a plan view showing a first embodiment of the foamed processing buffer paper bag body according to the present invention. [Figure 2] It is a perspective view showing the state where the opening of the foamed processing buffer paper bag body shown in FIG. 1 is opened. [Figure 3] It is a cross-sectional view of the foamed processing buffer paper bag body shown in FIG. 1 and a partially enlarged view thereof. [Figure 4] It is a plan view showing a second embodiment of the foamed processing buffer paper bag body according to the present invention. [Figure 5] It is a perspective view showing the state where the opening of the foamed processing buffer paper bag body shown in FIG. 4 is opened. [Figure 6] It is a cross-sectional view of the foamed processing buffer paper bag body shown in FIG. 4 and a partially enlarged view thereof. [Figure 7] It is a perspective view of the foamed processing buffer paper bag body shown in FIG. 4 as viewed from the bottom.

Embodiments for Carrying Out the Invention

[0018] The embodiments of the present invention will be described below with reference to the accompanying drawings. Needless to say, various changes or modifications can be made to these embodiments without departing from the technical idea of the present invention. The same members are denoted by the same reference numerals.

[0019] <The First Embodiment> FIG. 1 is a plan view showing one embodiment of the foamed processing buffer paper bag body according to the present invention, FIG. 2 is a perspective view showing the state where the opening of the foamed processing buffer paper bag body shown in FIG. 1 is opened, and FIG. 3 is a cross-sectional view of the foamed processing buffer paper bag body shown in FIG. 1 and a partially enlarged view thereof.

[0020] <Overall Structure of the Foamed Processing Buffer Paper Bag Body> The foam-processed cushioning paper bag 10A according to the first embodiment of the present invention is a bag made entirely of foam-processed cushioning paper 12, as shown in Figures 1 and 2. This foam-processed cushioning paper bag 10A integrally comprises a main body 14 for containing articles and a lid 18 for sealing the opening 16 of the main body 14. Since the foam-processed cushioning paper bag 10A of the present invention is made entirely of paper material, it can be recycled as recycled paper without separation after use, contributing to the reduction of environmental impact. An envelope is shown as an example of the foam-processed cushioning paper bag 10A.

[0021] The main body 14 is formed in a bag shape with an opening 16 at the top for inserting an article, by overlapping a front sheet that constitutes the front and a back sheet that constitutes the back, and joining both side edges and the bottom edge using known joining means such as adhesive or heat pressing. The lower part of the main body 14 functions as a bottom 20 that supports the weight of the article. Inside the main body 14, as shown in Figure 2, a storage space 22 is formed for accommodating the article to be sealed. Note that in Figure 2, the foam processing formed on the entire surface of the foam-processed cushioning paper 12 is slightly omitted.

[0022] The lid portion 18 is a flap-shaped member integrally formed by extending the upper end of the back sheet that constitutes the main body portion 14 longer than the front sheet. This lid portion 18 is configured to be foldable so as to cover the opening 16. As shown in Figure 1, the opening 16 is sealed by folding the lid portion 18 and overlapping it with the outer surface of the main body portion 14. Reference numeral 24 denotes the adhesive tab portion, which is glued and has a protective seal attached.

[0023] The adhesive flap 24 can also be fitted with a water-soluble adhesive (re-wetting adhesive) that becomes adhesive when wet. In this case, the user seals the package by wetting the adhesive flap 24. Other configurations are also possible, such as applying double-sided tape to the adhesive flap 24 or applying hot-melt adhesive. By providing such an adhesive flap 24, there is no need to prepare tape or adhesive separately, and sealing can be performed quickly and reliably.

[0024] <Composition of foamed cushioning paper> The foam-processed cushioning paper 12 that constitutes the foam-processed cushioning paper bag 10A of this invention is manufactured by using a stretchable paper, such as kraft paper, crepe paper, or recycled paper, as the base paper and applying an embossing process to it. The embossing process is carried out by passing the base paper between a pair of rolls having interlocking ridge and groove patterns, thereby forming numerous foam-like ridges and grooves 26 on the paper.

[0025] As shown in the cross-sectional view and partially enlarged view in Figure 3, the foamed cushioning paper 12 has numerous foam-like bumps 26 formed by embossing. As a result, the articles contained in the storage space 22 are supported point by point by point by point on

[0026] The shape of the uneven portion 26 is a hemispherical bubble shape as shown in the figure. Furthermore, the arrangement pattern of the uneven portion 26 is not limited to the grid arrangement shown in the figure, but can be designed as appropriate according to the desired buffering characteristics, such as a staggered arrangement or a random arrangement.

[0027] <Dimensions of the uneven parts> The bubble diameter of the foamy uneven portion 26 (corresponding to the diameter of the bottom surface of each recess or protrusion of the uneven portion 26) is preferably in the range of 4 mm to 20 mm. If the bubble diameter is less than 4 mm, each individual uneven portion 26 may be too small, making it difficult to obtain sufficient cushioning effect. On the other hand, if the bubble diameter exceeds 20 mm, the uneven portion 26 may be too large, impairing the flexibility of the bag itself, or the gaps between the uneven portions may become too large when protecting small items, making stable support difficult. Considering the balance between cushioning performance and ease of handling as a bag, this range is suitable. In the illustrated example, the bubble diameter of the foamy uneven portion 26 is shown as 12 mm.

[0028] Furthermore, the height of the bubbles in the foamy uneven portion 26 (the height from the flat surface 27 of the foamy cushioning paper 12 to the top of the uneven portion 26, i.e., the distance from the bottom surface to the top of the recess or protrusion of the foamy uneven portion 26) is preferably in the range of 1 mm to 6 mm. If the bubble height is less than 1 mm, the volume of the air layer held by the uneven portion 26 will be small, and it may not be able to exhibit sufficient cushioning capacity. On the other hand, if the bubble height exceeds 6 mm, the overall thickness of the bag will increase too much, making it bulky and potentially reducing the efficiency of storage and transportation. Therefore, this range is desirable in order to achieve both cushioning performance and practicality. In the illustrated example, as shown in Figure 3, an example of 3 mm (the total distance of the heights between each vertex of the recess and protrusion is 6 mm) is shown.

[0029] <Basis weight of foamed cushioning paper> The basis weight (weight per unit area) of the foamed cushioning paper 12 is 30 g / m². 2 ~200g / m 2 It is preferable that the basis weight be within this range. 2 If the basis weight is less than 200 g / m², the paper may lack sufficient strength, making it prone to tearing during embossing or unable to withstand the weight of the contents when used as a bag. Conversely, if the basis weight is 200 g / m², 2 Beyond this point, the paper becomes too hard, making it difficult to form the embossed surface 26. Furthermore, the bag itself becomes heavy and less flexible, making it difficult to handle. This basis weight range is suitable for meeting the multiple requirements of strength, processability, cushioning, and lightweight properties.

[0030] <Second Embodiment> Next, a second embodiment of the present invention will be described. As shown in Figure 4, the foam-processed cushioning paper bag 10B, which is the second embodiment of the present invention, has a smooth paper 28 attached to the outside of the foam-processed cushioning paper 12, and has a two-layer structure with the foam-processed cushioning paper 12 on the inside and the smooth paper 28 on the outside. The other configurations are the same as in the first embodiment. An envelope is shown as an example of the foam-processed cushioning paper bag 10B.

[0031] High-quality paper, coated paper, kraft paper, etc., can be used as the smooth paper 28 on the outside. Using smooth paper 28 on the outside has the advantage that address and sender information, or product logos and designs, can be printed easily and beautifully. In addition, laminating the smooth paper 28 improves the rigidity and tear strength of the entire bag, resulting in a more robust packaging. For lamination, known methods such as applying adhesive to the entire surface and laminating, or partial lamination, can be used. Reference numeral 30 denotes the adhesive flap portion.

[0032] <Composition of the gusset> In the foam-processed cushioning paper bag 10B according to the second embodiment of the present invention, as shown in Figures 5 to 7, a bottom gusset 32 ​​is formed at the bottom of the main body 34, which is folded inward. Alternatively, side gussets may be formed on both sides of the main body 34, which are folded inward. These gussets 32 are intended to expand the storage space 36 of the main body 34.

[0033] Normally, the gusset 32 ​​is folded, and the foam-processed cushioning paper bag 10B maintains a flat shape. However, when storing thick items such as books or boxes, the gusset 32 ​​expands outward according to the thickness, and the storage space 36 expands three-dimensionally. This makes it possible to easily and stably store thick items that would be difficult to store in a flat bag like the one in the first embodiment. The gusset 32 ​​can be provided only on the side of the main body 34, only on the bottom, or on both the side and the bottom.

[0034] <Third Embodiment> Although not shown in the illustrations, the foam-processed cushioning paper bag of this invention may have a three-layer structure. Specifically, a foam-processed cushioning paper 12 may be placed as the middle layer, and a smooth paper for the outer layer may be laminated to the outside and a smooth paper for the inner layer to the inside, forming a sandwich structure.

[0035] This configuration ensures that not only the outer surface of the bag but also the inner surface (the side facing the storage space) is smooth. This allows for smooth insertion and removal of contents, especially products with delicate surfaces or those with uneven shapes that could easily catch on uneven surfaces, reducing the risk of damaging the product surface. The foamed cushioning paper 12 in the intermediate layer provides cushioning, while the smooth inner and outer layers improve strength, printability, and protection of the contents. This three-layer structure results in a cushioning bag that achieves a high level of both functionality and ease of use.

[0036] Although embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications are possible within the scope of its technical concept. Furthermore, in all of the first to third embodiments described above, an envelope was shown as the foam-processed cushioning paper bag. The foam-processed cushioning paper bag of the present invention can be suitably used as an envelope. [Explanation of Symbols]

[0037] 10A, 10B: Foam-processed cushioning paper bag body, 12: Foam-processed cushioning paper, 14, 34: Main body, 16: Opening, 18: Lid, 20: Bottom, 22, 36: Storage space, 24, 30: Adhesive flap, 26: Foam-like uneven surface, 27: Flat surface, 28: Smooth paper, 32: Gusset.

Claims

1. A bag made of foam-processed cushioning paper having foam-like uneven surfaces formed by embossing, comprising a main body having an opening at the top and a bottom at the bottom, and a lid formed at the opening.

2. The foamy textured cushioning paper bag according to claim 1, wherein the foamy texture of the uneven surface has a foam diameter of 4 mm to 20 mm.

3. The foamy textured cushioning paper bag according to claim 1, wherein the foamy texture of the uneven surface has a foam diameter of 12 mm.

4. The foamy textured cushioning paper bag according to claim 1, wherein the height of the foamy bumps is 1 mm to 6 mm.

5. The basis weight of the aforementioned foamed cushioning paper is 30 g / m². ２ ~200g / m ２ The foam-processed cushioning paper bag body according to claim 1.

6. The foam-processed cushioning paper bag according to claim 1, wherein an adhesive flap is formed on the lid and the adhesive flap is subjected to an adhesive process.

7. The foam-processed cushioning paper bag according to claim 1, wherein a gusset that can expand the storage space of the main body is formed on the bottom and / or side of the main body.

8. The foam-processed cushioning paper bag according to claim 1, wherein a smooth paper is attached to the outside of the foam-processed cushioning paper, and the bag has a two-layer structure with the foam-processed cushioning paper on the inside and the smooth paper on the outside.

9. The foam-processed cushioning paper bag according to claim 1, having a three-layer structure in which a smooth paper is attached to the outside of the foam-processed cushioning paper and a smooth paper is attached to the inside of the foam-processed cushioning paper, with the foam-processed cushioning paper sandwiched between them.

10. The foam-processed cushioning paper bag according to any one of claims 1 to 9, wherein the foam-processed cushioning paper bag is an envelope.

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