WO2024048789A1

WO2024048789A1 - Exterior material, container, and combination of container and exterior material

Info

Publication number: WO2024048789A1
Application number: PCT/JP2023/032125
Authority: WO
Inventors: 裕義林
Original assignee: 株式会社Ky7
Priority date: 2022-09-01
Filing date: 2023-09-01
Publication date: 2024-03-07
Also published as: JP2024035228A; JP2024035227A; WO2024048790A1; CN117999164A

Abstract

Provided is a heat-insulating sheet in at least a portion of which a paper-based material is used, and which is excellent in heat-insulation performance. The heat-insulating sheet comprises: a first sheet that is formed from a paper-based material including fibers and that has a plurality of protruding sections on a first face side thereof; and a second sheet facing the protruding sections of the first sheet. At least a portion of the protruding sections includes a base end section and includes a low-density section in which the fiber density, that is determined to be the density of the fiber constituting the paper-based material, is lower than the fiber density of the base end section.

Description

Exterior materials, containers, and combinations of containers and exterior materials

The present invention relates to packaging materials, containers, and combinations of containers and packaging materials.

When high-temperature contents are stored in a container, it is required to slow the rate of temperature rise on the outer peripheral surface of the container. Furthermore, there is a demand for suppressing dew condensation on the outer circumferential surface of the container when low-temperature contents are stored in the container. For these reasons, containers are required to have improved heat insulation properties on their outer peripheral surfaces. Examples of the contents here include drinks such as coffee, foods such as noodles, and ice.

In response to the above request, Patent Documents 1 and 2 provide a sleeve as an exterior material so as to surround the outer circumferential surface of the container, and provide a convex portion protruding on the side of the sleeve facing the outer circumferential surface. It has been proposed to form a space between the outer circumferential surface of the material and the outer circumferential surface of the material to improve heat insulation.

Utility Model Publication No. 50-031073 Special table 2014-513650 publication

In Patent Document 1 and Patent Document 2, there is room for improvement in terms of improving the design of the outer peripheral surface of the sleeve and improving the design of the outer peripheral surface of a container having the same structure as the sleeve.

In addition, when high-temperature contents are stored inside a container equipped with a sleeve, the time for sufficient insulation to be maintained is short, and the improvement is made in that it slows down the speed at which the temperature rises on the outer surface of the container. There is room for For example, when high-temperature contents are stored in a container, if the temperature of the outer circumferential surface of the container increases quickly, it is difficult to carry the container while maintaining a grip on the outer circumferential surface of the container. If a person picks up a container and carries the container, for example, the container is carried while being held between the fingers, by placing one's fingers on the lower and upper ends of the container. In this case, since the fingers rest on the upper end of the container, the contents of the container may come into contact with the fingers, which may cause burns to the fingers.

Furthermore, in the techniques presented in Patent Document 1 and Patent Document 2, there is room for improvement in that the time required for condensation to form on the outer peripheral surface of the container is short when contents with low temperatures are stored. For example, if a container contains low-temperature contents and condensation quickly forms on the outer surface of the container, there is a risk that the container may slip from your hand when you grasp the outer surface of the container with your hand. be.

The present invention was made in view of the above points, and aims to provide an exterior material, a container, and a combination of a container and exterior material that facilitates improvement in design and has excellent heat insulation properties.

The gist of the present invention is the inventions according to the following (1) to (15).
(1) Used by being attached to the outer circumferential surface of the container body of a container having a container body, formed from a blank material having a paper-based material, protruding toward the side facing the outer circumferential surface, and having a proximal end and a distal end. a plurality of convex portions, the convex portions including a plurality of first convex portions and a second convex portion connected to at least two different first convex portions; The convex portion protrudes more toward the surface facing the outer peripheral surface than the second convex portion, and at least some of the convex portions have a density of fibers constituting the paper-based material that is lower than the base end. An exterior material having a low density part smaller than the density in the part.
(2) The exterior material according to (1) above, in which a combination structure portion is formed by a combination of the first convex portion and the second convex portion.
(3) According to (1) above, at least a portion of the low-density portion formed in at least some of the convex portions extends from the first convex portion to the second convex portion. exterior material.
(4) At least a portion of the low-density portions formed in at least some of the convex portions are formed in the first convex portion or the second convex portion, in the above (1). Exterior materials listed.
(5) At least some of the convex portions include a concealing portion that extends in a direction transverse to the thickness direction of the blank and conceals at least a portion of the outer peripheral surface, at a position closer to the tip than the low density portion. The exterior material according to (1) above, wherein the density of the fibers in the low-density portion is smaller than the density of the fibers in the concealment portion.
(6) The exterior material according to (1), wherein the low-density portion has a portion where the density of the fibers constituting the paper-based material decreases from the tip end toward the base end.
(7) The exterior material according to (1), wherein the low-density portion has a portion where the density of the fibers constituting the paper-based material decreases from the base end toward the distal end.
(8) The low-density portion includes a portion where the density of the fibers constituting the paper-based material decreases from the distal end to the proximal end, and a portion where the density of the fibers constituting the paper-based material decreases from the proximal end to the distal end. The exterior material according to (1) above, wherein the portions where the density of the fibers constituting the paper-based material decreases are connected.
(9) The exterior material according to (1) above, wherein the convex portion has a concave surface on a side not facing the outer circumferential surface.
(10) The exterior material according to (1) above, wherein a slit portion is formed in the convex portion.
(11) The exterior material according to (1) above, wherein a topsheet is laminated on the surface not facing the outer peripheral surface.
(12) The exterior material according to (1) above, wherein at least some of the convex portions include resin.
(13) The exterior material according to (1) above, wherein at least some of the second convex portions include a re-adhesive resin.
(14) The exterior material according to (1) above, which is used as a sleeve attached to the outer peripheral surface.
(15) A container, wherein the exterior material according to any one of (1) to (14) above is attached to the outer circumferential surface of the container body.
(16) A combination of a container and an exterior material, comprising a container having a container body and the exterior material according to any one of (1) to (14) above.

According to the present invention, it is possible to provide an exterior material, a container, and a combination of a container and exterior material that can improve the design. For example, by making the second convex part have a layout that corresponds to letters or a specific design, it is possible to create an exterior material with a design that imitates specific letters or a design that corresponds to a specific design. Therefore, it is possible to obtain an exterior material with excellent design.

According to the present invention, it is possible to provide an exterior material, a container, and a combination of a container and exterior material with excellent heat insulation properties. Specifically, even when a user picks up a container containing high-temperature contents and carries the container, for example, it is possible to reduce the need to carry the container while holding the container vertically between the fingers. As a result, it is possible to suppress the possibility that the contents of the container will touch the fingers, and it is also possible to suppress the possibility that the contents of the container may be burned by the high temperature contents.

Furthermore, according to the present invention, condensation is less likely to form on the outer circumferential surface of the container when low-temperature contents are stored. Therefore, according to the present invention, for example, when the container contains low-temperature contents and the outer peripheral surface of the container is grasped by hand, the risk of the container slipping from the hand due to dew condensation can be suppressed. be able to.

FIG. 1A is a plan view for explaining an example of the first embodiment. FIG. 1B is a cross-sectional view schematically showing a longitudinal cross-section taken along the line AA in FIG. 1A. FIG. 1C is a cross-sectional view schematically showing the state of the vertical cross-section taken along line BB in FIG. 1A. FIG. 2A is a plan view for explaining an example of the first embodiment. FIG. 2B is a cross-sectional view schematically showing the state of the vertical cross-section taken along the line CC in FIG. 2A. FIG. 3 is a plan view for explaining an example of the first embodiment. FIG. 4A is a plan view for explaining an example of the second embodiment. FIG. 4B is a cross-sectional view schematically showing the state of the vertical cross-section taken along the line DD in FIG. 4A. FIG. 4C is a cross-sectional view schematically showing the state of the vertical cross-section taken along the line EE in FIG. 4A. FIG. 5A is a plan view for explaining an example of a convex portion having a low density portion in the first embodiment. FIG. 5B is a cross-sectional view for explaining a vertical cross-section taken along the line FF in FIG. 5A, and a partially enlarged cross-sectional view for explaining an enlarged state of a portion surrounded by a dashed-dotted line XS. FIG. 5C is a cross-sectional view illustrating an embodiment of the contact portion between the convex portion and the outer circumferential surface of the container body when the exterior body is attached to the container body. FIG. 6 is an enlarged cross-sectional view of region X1 in FIG. 1B. FIG. 7A is a plan view for explaining an example of a convex portion having a low-density portion in the first embodiment. FIG. 7B is a plan view for explaining an example of a convex portion having a low density portion in the first embodiment. FIG. 7C is a plan view for explaining an example of a convex portion having a low-density portion in the first embodiment. FIG. 8A is a plan view for explaining an example of a convex portion having a low-density portion in the first embodiment. FIG. 8B is a plan view for explaining an example of a convex portion having a low density portion in the first embodiment. FIG. 9A is a plan view for explaining an example of a convex portion having a low density portion in the first embodiment. FIG. 9B is a plan view for explaining an example of a convex portion having a low density portion in the first embodiment. FIG. 9C is a plan view for explaining an example of a convex portion having a low density portion in the first embodiment. FIG. 10 is a plan view for explaining an example of the first embodiment. FIG. 11 is a cross-sectional view for explaining one embodiment of a container with an exterior material attached. FIG. 12 is a perspective view for explaining an embodiment in which the exterior material is used as a sleeve. 13A and 13B are plan views for explaining an example of the third embodiment. 14A and 14B are plan views for explaining an example of the third embodiment. FIG. 15A is a cross-sectional view for explaining an example of the fourth embodiment. FIG. 15B is a cross-sectional view for explaining an example of the fifth embodiment.

Below, the heat insulating sheet according to the present invention will be described in the order of a first embodiment, a second embodiment, a third embodiment, a fourth embodiment, and a fifth embodiment with reference to the drawings. . Further, application examples will also be explained.

In this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals and redundant explanation will be omitted.

The following description is a preferred specific example of the present invention, and the content of the present invention is not limited to these embodiments. Further, in the following description, directions such as front and back, left and right, up and down, and directions of a horizontal plane are shown for convenience of explanation, but the content of the present invention is not limited to these directions. In the example of FIG. 1, the Z-axis direction is the vertical direction (the upper side is the +Z direction and the lower side is the -Z direction), and the X-axis and Y-axis are orthogonal to each other and are The directions along the axes are assumed to be the X-axis direction and the Y-axis direction, and furthermore, the XY plane, which is a plane pasted by the X-axis and the Y-axis, is assumed to be a horizontal plane, and the explanation will be based on these. Regarding the X-axis, Y-axis, and Z-axis, the same applies to other drawings in FIG. 1 (FIGS. 2 to 15). The relative size ratios shown in each of FIGS. 1 to 15 are for convenience, and do not limit the actual size ratios.

[1 First embodiment]
[1-1 Configuration]
The exterior material 1 according to the first embodiment can be used by being attached to the outer circumferential surface of a container body (hereinafter sometimes simply referred to as the body) of a container. As explained based on FIGS. 1, 5, and 6, the exterior material 1 has a sheet 3 serving as a base material, and when attached to the outer circumferential surface of the container body, there is a layer from the sheet 3 to the side facing the outer circumferential surface. It has a plurality of protrusions G each having a protruding base end and a distal end. The exterior material 1 includes, as the convex portions G, a plurality of first convex portions 22 and a second convex portion 23 connected to at least two different first convex portions. FIG. 1A is a perspective view showing an example of the exterior material 1 according to the first embodiment. FIG. 1B is a cross-sectional view showing an example of the exterior material 1 according to the first embodiment, corresponding to the cross section taken along the line AA in FIG. 1A. FIG. 1C is a diagram showing an embodiment corresponding to the cross section taken along line BB in FIG. 1A, and is a cross-sectional view for explaining an example of the second convex portion 23. FIG. FIG. 6 is a diagram schematically showing an enlarged state of region X1 in FIG. 1B. FIG. 5A shows an example in which the first convex portion 22 has a structure corresponding to the convex portion 9 shown in FIG. 1B.

(Protrusion)
In the exterior material 1, at least some of the convex portions G have low density portions 12, which will be described later. In the first embodiment, the description of at least the first convex portions 22 will be continued using as an example a case where the low density portions 12 are formed in at least some of the first convex portions 22. However, this does not prohibit the formation of the low density portion 12 in the second convex portion 23. Note that, from the viewpoint of further enhancing the effects of the present invention, it is preferable that the first convex portion 22 has a low-density portion 12 formed therein. Further, as shown in the example of FIG. 1A, all of the first convex portion 22 may be connected to the second convex portion 23, or a part of the first convex portion 22 may be connected to the second convex portion 23. May be connected.

(Shape of exterior material)
The exterior material 1 has a structure that can be attached to the outer peripheral surface 504 of the container body 502 of the container 500. The exterior material 1 is formed in a sheet shape, and when attached to the container body 502 of the container 500, may be arranged into a shape corresponding to the shape of the outer circumferential surface 504 of the container body 502.

For example, when the container 500 has a cylindrical outer circumferential surface 504 that has an open upper surface side into which coffee or the like can be placed and whose diameter decreases downward, the exterior material 1 has a fan-shaped outer circumferential surface 504 as shown in FIG. The structure can be easily attached to the container body 502 of the container 500 by joining the fan-shaped ends (side ends 43) with an adhesive or the like. FIG. 10 is a plan view showing one embodiment of the exterior material 1. As shown in FIG. This can be achieved, for example, by attaching a double-sided adhesive tape to one side edge 43 and overlapping the other side edge 43 to adhere both side edges 43 via the adhesive tape. For convenience of explanation, FIG. 10 shows an example in which all the first protrusions 22 also serve as the protrusions 9, and the protrusions 9 are provided with sub-protrusions 9D. However, this is just an example, and as described later, the exterior material 1 may be fixed to the container body 502 and constitute a part of the container 500, or the exterior material 1 may be configured in advance to correspond to the shape of the outer peripheral surface 504 of the container body 502. The sleeve 560 may be shaped as a separate member from the container 500.

(sheet)
The sheet 3 serving as the base material on which the convex portions G are formed is composed of a fiber sheet 18 that is at least partially made of a paper-based material. In the example of FIG. 1, the sheet 3 is entirely formed using a paper-based material. That is, in this example, the fiber sheet 18 is a paper-based sheet formed from a paper-based material. Paper-based materials forming the fiber sheet 18 (materials of the fiber sheet 18) include so-called papers manufactured by adhering plant fibers and other fibers, as well as chemical fiber paper, synthetic paper, waterproof paper, and coated paper. Examples include paper, alternative paper, parchment, wool paper, glass fiber paper, stone paper, and ceramic paper. The paper-based material may be recycled paper or non-recycled paper. Note that, as long as a material having a fiber material is used as the material of the sheet 3, the use of a non-paper material is not prohibited. Examples of non-paper materials include cloth materials (woven materials and non-woven materials). Examples of the non-woven material include a so-called air-laid sheet formed into a sheet by combining pulverized pulp stacked by air flow, a pulp-based material, and a non-woven fabric made of fibers such as natural fiber materials and synthetic fibers. As the material of the fiber sheet 18, it is also possible to use a combination of a paper-based material and a non-paper-based material.

(First convex portion)
In the exterior material 1, the first protrusion 22 protrudes more toward the surface facing the outer peripheral surface than the second protrusion 23. At least some of the first protrusions 22 are connected to second protrusions 23, as shown in FIGS. 1A, 1B, and 1C. As shown in FIG. 6, at least some of the first convex portions 22 have low-density portions 12 formed between the distal end portion 22A and the proximal end portion 22B. 1A, FIG. 1B, FIG. 1C, and FIG. 6, reference numeral 92A indicates a convex surface of the first convex portion 22, and reference symbol 92B indicates a concave surface of the first convex portion 22.

In the example of FIG. 1B, the first protrusion 22 is formed to protrude from above the second protrusion 23 in the same direction as the protrusion direction of the second protrusion 23. Therefore, the base end 22B of the first protrusion 22 is located above the second protrusion 23, and the distal end 22A of the first protrusion 22 further protrudes from above the second protrusion 23. formed in position. The peripheral portion 15 is formed by excluding the first convex portion 22 and the second convex portion 23, and in the example shown in FIG. 1A, the peripheral portion 15 is formed between the adjacent second convex portions 23. ing.

However, if the sheet 3 is formed in a shape that protrudes further from above the second protrusion 23 in the same direction as the protrusion direction of the second protrusion 23, at least some of the first protrusion 22 in the sheet 3 Regarding the base end portion 22B, at least a portion of the base end portion 22B may be formed at a position away from the second convex portion 23. Further, at least a portion of the base end portion 22B may coincide with the base end portion 23B of the second convex portion 23. For example, in the example shown in FIGS. 2A and 2B, a part of the base end 22B of the first protrusion 22 formed near the end along the longitudinal direction of the second protrusion 23 becomes the second protrusion. This corresponds to the base end 23B of the portion 23. FIG. 2A is a plan view schematically showing an example of the exterior material 1 according to the second embodiment. FIG. 2B is a cross-sectional view taken along the line CC in FIG. 2A, and is a diagram showing the first convex portion 22 and the second convex portion 23. FIG.

(Second protrusion)
The sheet 3 has a plurality of second convex portions 23. Like the first protrusion 22, the second protrusion 23 protrudes from the sheet 3 toward the surface 3A facing the outer circumference 504 when attached to the outer circumference 504 of the container body 502. Further, as shown in FIG. 1C, the second convex portion 23 is formed in a region including at least two different first convex portions 22. The second protrusion 23 is formed to connect at least two different first protrusions 22. In the examples shown in FIGS. 1A and 1B, the second protrusion 23 is formed to connect two different adjacent first protrusions 22. Note that in FIGS. 1A and 1B, 93A indicates a convex surface of the second

convex portion

23, and 93B indicates a concave surface of the second convex portion 23. Reference numeral 23A indicates the tip end of the second protrusion 23, and reference numeral 23B indicates the base end of the second protrusion. The same applies to FIG. 1C, FIG. 2A, FIG. 2B, FIG. 3, etc.

Here, the first protrusions 22 adjacent to one first protrusion 22 indicate the first protrusions 22 directly facing the one first protrusion 22.

As shown in FIG. 1B, the two first protrusions 22 may be connected by forming a layout in which the first protrusion 22 is formed on the second protrusion 23; The convex portion 23 is not limited to such a layout. The second convex portion 23 may be formed to connect the convex surfaces 92A of the two first convex portions 22. In this case, a portion of the base end 22B of the first protrusion 22 is formed at a position away from the second protrusion 23.

(Second protrusion)
In the example shown in FIG. 1A, the second convex portion 23 is formed in a shape that extends obliquely in a band shape, and a plurality of second convex portions 23 are formed in a line with intervals. Each of the second protrusions 23 connects the diagonally adjacent first protrusions 22 and extends along the longitudinal direction of the second protrusions 23 above the second protrusions 23 (on the convex surface 93A side). A plurality of first convex portions 22 are formed. At this time, above the second protrusion 23, the plurality of first protrusions 22 are lined up at predetermined intervals. The interval between adjacent first protrusions 22 may be constant or may be different.

(Shape of second convex portion)
The shape of the second convex portion 23 is formed to have a trapezoidal cross section in the example of FIG. 1C. Note that the shape of the second convex portion 23 is not limited to the example shown in FIG. 1C, and may have other shapes. For example, the shape of the second convex portion 23 may be U-shaped in cross-section, rectangular in cross-section, mountain-shaped in cross-section, or irregular in shape. In FIG. 1A, the shape of the second convex portion 23 in a plan view is formed to have a band-like shape and extend linearly; however, the shape of the second convex portion 23 is not limited to such a case. , may be in the form of a polygonal line or a curved line. Further, the shape of the second convex portion is not limited to a band shape, and may be a dot shape or a rectangular shape.

(Height of second convex portion)
As shown in FIG. 1B, the height of the second convex portion 23 (height difference from the peripheral portion 15 to the tip 23A) (H2) is the total height of the first convex portion 22 (from the peripheral portion 15 to the tip 23A). 22A) (height difference up to 22A) (H1). As a result, when the exterior material 1 is attached to the outer circumferential surface 504 of the container body 502, the tip 9A of the first convex portion 22 is in contact with the outer circumferential surface 504 of the container body 502, and the second convex The portion 23 can be spaced apart from the outer circumferential surface 504 of the container body 502. Since the height of the second convex portion 23 is formed to be lower than that of the first convex portion 22, the contact area between the sheet 3 and the outer circumferential surface 504 of the container body 502 increases excessively. It is possible to suppress the possibility that the condition will continue, and the heat insulating properties of the sheet 3 can be maintained.

(Formation of first convex portion and second convex portion)
The first convex portion 22 can be formed as an embossed portion (first convex embossed portion) by embossing. The second convex portion 23 can be formed as an embossed portion (second convex embossed portion) formed by embossing. The second protrusion 23 may be formed integrally with the first protrusion 22 when the first protrusion 22 is formed by embossing. Further, the first convex portion 22 and the second convex portion 23 may be individually embossed.

(Pitch and layout of convex portion G)
Although the pitch of the convex portions G is not particularly limited, it is preferably larger than the outer diameter (diameter) of the proximal end portion of the convex portions G. As shown in the example of FIG. 1A, the pitch of the convex portions G indicates the distance between the centers of adjacent convex portions. Since the pitch PI of the convex portions G is large, it is possible to form a state in which adjacent convex portions 9 are slightly separated from each other. Further, when the convex portions 9 are slightly spaced apart, it becomes easier to form the low density portions 12, which will be described later, in the manufacturing process of the sheet 3. Further, the pitch between adjacent convex portions 9 may be constant (even) or may be non-uniform. 1A to 1C are diagrams showing an example of the layout of the convex portion 9. FIG. In FIG. 1A, the convex portions 9 are arranged in a staggered manner with a uniform pitch. In addition, the convex portions 9 may be arranged in a lattice shape with a uniform pitch.

(Convex part with low density part)
The structure of the convex portion 9 in which the low-density portion 12 is formed among the convex portions G formed on the sheet 3 will be described. 5 to 9 are diagrams illustrating the convex portion 9 in which the low-density portion 12 is formed. At least some of the protrusions 9 also serve as the first protrusions 22. 5A to 5C and FIG. 6 show an example in which the convex portion 9 also serves as the first convex portion 22.

As described above, the sheet 3 has a plurality of convex portions 9 on one side. The convex portion 9 protrudes toward the surface 3A of the sheet 3 facing the outer circumferential surface of the container body. The convex portion 9 has a base end 9B and a tip end 9A.

In addition, in the exterior material 1 shown in the example of FIGS. 5A and 5B, the convex portions 9 are formed in a dot shape when viewed from the top of the sheet 3, and at least some of the convex portions 9 are formed by adjacent convex portions 9. The base end portions 9B of the two are separated from each other. However, this is just an example, and some of the convex portions 9 may be formed in a shape different from the dot shape. Further, the base end portions 9B of adjacent convex portions 9 may be connected.

(shape of convex part)
As shown in FIGS. 5A, 5B, and 6, the shape of the convex surface 90 of the convex portion 9 is a portion (which may be referred to as a sub-protrusion 9D) raised toward the tip side of the main protrusion 9C formed in a substantially dome shape. ). However, FIG. 5A, FIG. 5B, and FIG. 6 are a plan view and a cross-sectional view showing one example of the convex portion 9. FIG. 5A is an enlarged plan view schematically showing a portion of the convex portion 9. FIG. FIG. 5B schematically shows the state of the longitudinal section taken along the line FF in FIG. 5A, and is an enlarged sectional view showing the convex portion 9 and its surroundings. Note that the protrusion 9 shown in FIGS. 5A and 5B is an example, and the shape of the protrusion 9 is not limited. For example, the shape of the main raised portion 9C of the convex portion 9 may be a vertical truncated shape such as a truncated triangular pyramid shape or a truncated quadrangular pyramid shape, a truncated conical shape, a columnar shape, or the like. Further, the sub-protrusion 9D may be formed on the tip side of the protrusion 9 even when the main protrusion 9C has a vertical shape such as a triangular pyramid shape or a quadrangular pyramid shape, a truncated cone shape, a columnar shape, or the like. Although the shape of the sub-protrusion 9D is disk-shaped in the examples shown in FIGS. 5A and 5B, this is just an example and is not limited to the shape shown in FIGS. 5A and 5B.

(base end)
The proximal end portion 9B of the convex portion 9 is constituted by a portion where the convex portion 9 rises from a peripheral portion 15 formed on the outside of the convex portion 9. The peripheral portion 15 is formed between adjacent convex portions 9. In the examples shown in FIGS. 1A, 1B, and 2B, the portion of the sheet 3 excluding the convex portion 9 is the peripheral portion 15.

(Tip)
The tip portion 9A of the convex portion 9 can be defined as a predetermined portion including the tip of the convex portion 9 (the tip and the portion adjacent thereto). In the example of FIGS. 5A and 5B, a predetermined portion (front surface portion 9D1 of the sub-protrusion 9D) including the center of the sub-protrusion 9D of the protrusion 9 is the tip 9A of the protrusion 9. The tip portion 9A is a portion where fibers exist, and is a portion where a plurality of the fibers forming the paper-based material cross.

(compression section)
Although the configuration of the tip 9A of the convex portion 9 is not particularly limited, it is preferable that a compressed portion 16 is formed in the tip 9A. The compressed portion 16 is a portion where the compression ratio of the fiber sheet 18 for forming the sheet 3 is higher than that of the base end portion 9B. In the example shown in FIGS. 5A and 5B, the compressed portion 16 is the entire portion of the convex portion 9 excluding the base end portion 9B and the low density portion 12. Therefore, in this example, the compressed portion 16 is formed at least at the distal end portion 9A. When the compressed portion 16 is formed at least at the tip 9A, at least the tip 9A of the convex portion 9 is stiff, and when the tip 9A is in contact with the outer peripheral surface of the container body, the convex portion 9 It is possible to reduce the possibility that the shape of the convex portion 9 will collapse and the contact area between the convex portion 9 and the outer peripheral surface of the container body will increase more than necessary.

(Thickness of compression part)
The thickness of the compression part 16 is preferably thinner than the thickness of the base end part 9B. Such a configuration is achieved by pressing the portion corresponding to the compressed portion 16 with a predetermined pressure higher than the portion corresponding to the base end portion 9B when embossing the fiber sheet 18, which will be described later. be able to.

(Flat surface)
As shown in the examples of FIGS. 5A and 5B, it is preferable that a flat surface 17 is formed at the tip end 9A of the convex portion 9. When the flat surface 17 is formed on the tip 9A, when the sheet 3 is joined to the outer circumferential surface of the container body, the tip 9A is stably in contact with the outer circumferential surface of the container body. This makes it easier. However, this is not limited to the case where the tip end portion 9A of the convex portion 9 in the sheet 3 is the flat surface 17. The tip end portion 9A of the convex portion 9 in the sheet 3 may have a concave surface or a convex surface.

(Low density part)
At least some of the plurality of convex portions 9 have low density portions 12, as shown in FIGS. 5A and 5B. The low density portion 12 can be defined as a portion where the density (fiber density) of the fibers 18A forming the paper-based material is smaller than the density (fiber density) of the fibers 18A in the base end portion 9B. The density of the fibers 18A forming the paper-based material indicates the density of the fibers 18A forming the fiber sheet 18 when the sheet 3 is formed.

In the example shown in FIGS. 5A and 5B, the low-density portion 12 is formed along the convex surface 90 of the convex portion 9 at a position between the base end portion 9B and the distal end portion 9A. In the example shown in FIGS. 5A and 5A, the low-density portion 12 is formed along the convex surface 90 of the convex portion 9 at a position closer to the proximal end portion 9B than the outer peripheral edge of the distal end portion 9A, that is, at the sub-protrusion portion 9D. It is formed on the side surface portion 9D2.

It is preferable that the low-density portion 12 is a portion having a lower density than the density of the fibers 18A (fiber density) in the tip portion 9A. Further, it is preferable that the low density portion 12 has a lower density than the density of the fibers 18A in the peripheral portion 15. However, it is assumed that the low density portion 12 is a portion where a plurality of fibers 18A are present. Note that, similar to the slit-like structure portion 35 described later, the low-density portion 12 changes in outline shape when a tensile force is applied to the fiber sheet 18 in the plane direction of the fiber sheet 18. It is preferable that the fibers 18A are present to such an extent that the fibers 18A are regulated. Furthermore, the low-density portion 12 is a portion where the fibers 18A are present to an extent that restricts the displacement of the fibers 18A near the contour position of the low-density portion 12 from the convex surface 90 of the convex portion 9 toward the outside. It is preferable that

(fiber density)
The fiber density (density of the fibers 18A) indicates tightness. The fiber density can be determined, for example, by cutting out a predetermined portion of the convex portion 9, measuring the basis weight and thickness of the cut out portion, and specifying the value based on the value obtained by dividing the basis weight by the thickness (basis weight/thickness). Can be done.

The cut out part can be determined depending on the part to be specified. For example, the density of the fibers 18A at the proximal end 9B can be determined by cutting out predetermined portions at a plurality of arbitrarily selected locations from the proximal end 9B and determining the arithmetic average value of the density of the fibers 18A at the cut out portions. can. The density of the fibers 18A at the tip 9A can be determined by cutting out the tip 9A and determining the density of the fibers 18A in the cut out portion. Further, the density of the fibers 18A in the peripheral portion 15 can be determined as the arithmetic average value of the density of the fibers 18A in the cut out portions by cutting out predetermined portions at a plurality of arbitrarily selected locations from the peripheral portion 15. However, the method for specifying fiber density described here is just an example, and the use of other methods is not prohibited. In addition to the above, a decrease in fiber density may be determined using a method such as measuring light transmittance.

(Shape of low density part)
The shape of the low-density portion 12 is not particularly limited, but in the examples shown in FIGS. 5A, 5B, and 6, it extends from the proximal end 9B to the distal end 9A of the convex portion 9 in the vertical direction (position in the Z-axis direction). A crevice shape extending in a curved line in the XY plane direction is formed at a position in between. Note that the low-density portion 12 being formed in the shape of a fissure indicates that the portion where the amount of fibers 18A is recognized to be small in the visual appearance of the fiber sheet 18 extends linearly. In this case, the linear shape includes a straight line, a polygonal line, a curved line, and a combination thereof.

It is preferable that the low density portion 12 is formed so as to surround the tip portion 9A of the convex portion 9. In the examples shown in FIGS. 5A and 5B, the low-density portion 12 is formed so as to surround the entire periphery of the tip portion 9A of the convex portion 9 when the sheet 3 is viewed from above. However, this does not limit the layout of the low density section 12. For example, as shown in FIG. 7A, the low-density portion 12 may have a portion extending from the distal end portion 9A of the convex portion 9 in the direction of the proximal end portion 9B. As shown in FIG. 7B, the low density portion 12 may be formed in a part of the periphery of the tip portion 9A of the convex portion 9. Further, the low density portions 12 may be formed at different positions along the convex surface 90 of the convex portion 9. For example, as shown in FIG. 7C, a plurality of low-density portions 12 may be formed separately at a position close to the distal end portion 9A and a position close to the proximal end portion 9B of the convex portion 9.

(first part)
Preferably, the low density portion 12 has a first portion 19 . The first portion 19 in the low-density portion 12 is defined as a portion where the density (fiber density) of the fibers 18A constituting the paper-based material forming the convex portion 9 decreases from the distal end 9A to the proximal end 9B. Ru. In the example of FIG. 5B, the first portion 19 is formed in the low-density portion 12 at a position on the end portion 12A side closer to the tip portion 9A.

For example, if the first portion 19 is divided into a plurality of sections with equal dimensions and the density in each section is determined, then the density in the section near the tip 9A and the base fiber density are reduced. It can be identified by comparing the density at a position near the end 9B.

(Second part)
Preferably, the low density portion 12 has a second portion 20 . The second portion 20 in the low-density portion 12 is defined as a portion where the fiber density of the fibers 18A forming the paper-based material forming the convex portion 9 decreases from the base end 9B to the distal end 9A. In the example of FIG. 5B, it is formed at a position on the end 12B side of the low-density portion 12 near the base end 9B.

The fact that the fiber density of the second portion 20 is lower can be determined, for example, in the same manner as the first portion 19.

(Positional relationship between the first part and the second part)
It is preferable that the low density portion 12 is formed such that the first portion 19 and the second portion 20 are connected. That is, in the low-density portion 12, there is a portion where the fiber density of the fibers 18A constituting the paper-based material decreases from the distal end 9A to the proximal end 9B, and a portion where the fiber density of the fibers 18A constituting the paper-based material decreases from the proximal end 9B to the distal end 9A. It is preferable that the portions of the fibers 18A constituting the fibers 18A where the fiber density becomes small are connected.

Note that in the low-density portion 12, a portion where the fiber density is approximately constant may be interposed between the first portion 19 and the second portion 20. In addition to cases where the fiber density is uniform, the portion where the fiber density is approximately constant includes a portion where the variation in fiber density is smaller than that in the first portion 19 and the second portion 20.

(Non-facing side)
In the sheet 3, on the surface 3B side that does not face the outer circumferential surface 504 of the container body 502, in the examples of FIGS. ing. The concave surface 91 may be formed in a shape corresponding to the convex surface 90 of the convex portion 9 . Therefore, regions in which a plurality of concave surfaces 91 are formed are formed on the non-facing surface 3B. The layout and pitch of the forming regions of the plurality of concave surfaces 91 correspond to the layout and pitch of the convex portions 9. However, this is an example of the non-facing surface 3B, and a convex structure may be formed on the non-facing surface 3B as described later.

(hidden part)
It is preferable that the convex portion 9 has a concealing portion 21 formed at a position closer to the tip portion 9A than the low-density portion 12. The concealing portion 21 restricts exposure of the outer circumferential surface 504 of the container body 502 from the exposed surface side of the sheet 3 . Here, the concealing portion 21 may be formed to completely hide the outer circumferential surface of the container body from the outside, or may be formed to cover the outer circumferential surface of the container body 502 from the exposed surface side of the sheet 3 via the concealing portion 21. This also includes a case where part or all of 504 is formed so that it can be seen through. It is preferable that the concealing portion 21 is formed so as to extend along a direction intersecting the thickness direction of the sheet 3. The concealing part 21 may be formed in a curved or bent shape instead of being formed in a flat plate shape. The concealing portion 21 is preferably configured as a portion having a higher fiber density than the low density portion 12.

In the convex portion 9, the concealing portion 21 may be formed in a portion of the convex portion 9 that includes at least a portion of the tip portion 9A. Further, the distal end portion 9A may also serve as the concealing portion 21, and the concealing portion 21 may be formed in a part of the distal end portion 9A. The concealing portion 21 may be formed in a portion including the tip portion 9A. In the examples shown in FIGS. 5A and 5B, the tip portion 9A also serves as the concealing portion 21. In addition, when the distal end portion 9A includes the concealing portion 21 (either the case where the concealing portion 21 is formed inside the distal end portion 9A or the case where a part of the concealing portion 21 is formed on the distal end portion 9A), This includes a case where the distal end portion 9A has a structure of a gap or a hole in addition to the concealing portion 21 due to the formation of a gap or a hole in the distal end portion 9A.

[1-2 Manufacturing method]
Next, a method for manufacturing the exterior material 1 according to the first embodiment will be described. A sheet of paper-based material (referred to as a fiber sheet 18) that forms the sheet 3 is prepared. The exterior material 1 can be obtained by forming the convex portions G by subjecting the sheet material forming the sheet 3 to a specific embossing process, for example. In this case, the convex portion G is formed as a convex embossed portion, with a convex surface formed on the facing surface 3A side, and a concave surface formed at a position on the non-facing surface 3B side corresponding to the portion where the convex surface is formed. The concave surface may be formed in a shape corresponding to the convex surface of the convex surface.

The low-density portion 12 of the convex portion 9 of the convex portion G can be formed by setting various conditions such as embossing conditions and the shape of the mold. Note that the sheet material is not particularly limited as long as it is capable of forming the convex portions 9 and is made of a paper-based material (fiber sheet 18), and may be a sheet with a flat surface. , it may be a sheet with a non-flat surface. An example of a sheet with a non-flat surface is a sheet with a continuous uneven surface such as a fine wave surface (a wave surface with a height smaller than both the first convex portion 22 and the second convex portion 23). I can give an example.

The low-density portion 12 is formed by locally loosening the fibers 18A constituting the fiber sheet 18 at a predetermined portion within the convex portion 9 or locally cutting the fibers 18A at a predetermined portion within the convex portion 9 during embossing. It can be formed by causing For example, in the embossing process, a portion of the fiber sheet 18 corresponding to the tip 9A of the convex portion 9 is sandwiched between embossing molds before being perforated, and pressure is further applied to the portion of the fiber sheet 18 to form the embossing mold. By being pressed, at least a portion of the fiber 18A is loosened or destroyed at a predetermined position closer to the proximal end 9B than the distal end 9A in the portion corresponding to the convex portion 9, and a low density portion 12 is generated. is possible. At this time, in the embossing mold, a portion corresponding to the vicinity of the tip 9A of the convex portion 9 comes into surface contact with the fiber sheet 18, thereby suppressing the tip 9A from being perforated when creating the low density portion 12. A concealing portion 21 can also be formed. The concealing portion 21 is preferably formed in a portion including at least a portion of the tip portion 9A.

Then, the exterior material 1 is obtained as an embossed fiber sheet 18 (embossed sheet).

[1-3 Action and effect]
According to the exterior material 1 according to the first embodiment, the first convex portions 22 are formed as at least some of the convex portions G, and at least some of the first convex portions 22 cover the low-density portions 12. A convex portion 9 is formed. As a result, when a hot object touches the side facing the outer peripheral surface of the container body, the portion of the first convex portion 22 that also serves as the convex portion 9 transfers heat from the container body to the tip 9A of the convex portion 9. Even if the heat is transferred to the base end 9B of the convex part 9, the heat from the distal end part 9A is transferred to the base of the convex part 9 through the fibers 18A because the low density part 12 is formed between the distal end part 9A and the proximal end part 9B of the convex part 9. It becomes difficult to reach the end portion 9B along the fiber sheet 18. Further, the first convex portion 22 can function as a spacer for forming a gap 27 between the container body 502 and the sheet 3, as shown in FIG. 5C. Thereby, an air layer is formed in the gap 27, and the effect of suppressing heat conduction can also be obtained by the air layer.

According to the exterior material 1 according to the first embodiment, the shape of the sheet 3 can be stabilized by forming the second convex portion 23. According to the exterior material 1 according to the first embodiment, the second convex portion 23 is formed even when force is applied to the outer peripheral surface 504 from the non-facing surface 3B side toward the facing surface 3A side. Thus, the sheet 3 is less likely to undergo deformation that would cause the facing surface 3A side to further protrude, and it is possible to suppress the possibility that the peripheral portion 15 of the sheet 3 will come into contact with the outer circumferential surface of the container body. By the way, the second convex portion 23 protrudes toward the facing surface 3A side. Therefore, at the position where the second protrusion 23 is formed, the distance between the sheet 3 and the outer peripheral surface of the container body is smaller than when the second protrusion 23 is not formed. However, in the first embodiment, the second protrusion 23 is formed to connect two different first protrusions 22. Therefore, the sheet 3 is less likely to deform more than necessary, and unplanned contact between the peripheral portion 15 and the outer circumferential surface is suppressed.

According to the exterior material 1 according to the first embodiment, a plurality of convex portions 9 are formed, and the tip portions 9A of the convex portions 9 face the outer circumferential surface of the container body. A low density portion 12 is formed in the convex portion 9 .

Furthermore, in the first embodiment, as shown in FIGS. 5B and 5C, the low-density portion 12 is formed closer to the proximal end portion 9B than the concealing portion 21, so that at least a portion of the low-density portion 12 is At least a portion of the low-density portion 12 can be directed toward the gap 27 without contacting the container body. When the air layer in the gap 27 in the exterior material 1 is heated, the air AH can be gradually diffused in the direction from the low-density portion 12 to the outside of the sheet 3 in the low-density portion 12, and the air is heated. The air AH contained in the air layer can be gradually released to the outside. It is thought that this also makes it possible to suppress the rise in temperature on the side of the surface 3A of the exterior material 1 facing the container body.

[2-3 Modification example]
Next, a modification of the first embodiment will be described in detail.

(Modification 1)
In the first embodiment, the first convex portion 22 and the second convex portion 23 may form a combination structure 24 . (This form will be referred to as modification 1 of the second embodiment). FIG. 3 is a diagram illustrating an example in which the sheet 3 of the exterior material 1 according to the first modification of the second embodiment forms a combination structure 24.

(Combination structure part)
The combination structure portion 24 indicates a portion configured to display a unified design of the first convex portion 22 and the second convex portion 23 as a whole. The combination structure portion 24 can be formed, for example, by determining the layout of the second convex portions 23 so that one character or pattern is displayed by one or more second convex portions 23. . In the example of FIG. 3, the layout of the second convex portion 23 in the combination structure portion 24 is determined so that the letter Y is an uppercase letter of the alphabet. Note that the number of combination structures 24 is not limited to one, and a plurality of combination structures may be formed.

(Modification 2)
In the first embodiment, a portion of the low-density portion 12 formed in at least some of the first convex portions 22 extends to the second convex portion 23 that is in contact with the first convex portion 22. You can leave it there. (This form will be referred to as modification 2 of the second embodiment). By extending the low-density portion 12 to the second convex portion 23, a wide area of the low-density portion 12 can be ensured, and the speed at which heat spreads throughout the exterior material 1 can be further reduced.

(Modification 3)
In the above description of the first embodiment, at least some of the protrusions 9 that also serve as the first protrusions 22 had the sub-protrusions 9D, but the sub-protrusions 9D were omitted in the protrusions 9. (Modification 3). Modification 3 is the same as the above-described first embodiment except that the sub-protrusion 9D is omitted from the protrusion 9, so a description thereof will be omitted.

In the example of Modification 3, the main protrusion 9C is formed up to the tip of the protrusion 9, and the main protrusion 9C forms the protrusion 9. The main raised portion 9C may have an open end or a closed end. Further, the tip portion 9A is formed in a predetermined range including the tip of the main raised portion 9C. A portion including the distal end portion 9A is a concealing portion 21, and a low density portion 12 is formed around the concealing portion 21 (a predetermined portion on the proximal end portion 9B side along the main raised portion 9C). In addition, when the sub-protrusion part 9D is not formed in the protrusion part 9, the tip of the main protrusion part 9C of the protrusion part 9 and the part near it are defined as the tip part 9A of the protrusion part 9.

(Modification 4)
In the first embodiment, as shown in FIG. 9A, the sheet 3 may have a slit portion 34 formed in the convex portion 9 (referred to as modification 4 of the first embodiment). FIG. 9A is a plan view for explaining an example of Modification 2. FIG. In the example of FIG. 9A, the slit portion 34 is formed closer to the proximal end portion 9B than the distal end portion 9A of the convex portion 9.

(slit part)
In the third modification of the first embodiment, the slit portion 34 is formed closer to the proximal end portion 9B than the low-density portion 12 of the convex portion 9 in the example of FIG. 9A, but as shown in FIG. The slit portion 34 may intersect with the high-density portion 12 or may be formed closer to the tip portion 9A than the low-density portion 12, and the slit portion 34 may be formed to merge with the low-density portion 12. . The slit portion 34 may be located within the region where the low density portion 12 is formed.

(Method of forming slit portion)
When the convex portions 9 are formed by embossing, the fiber sheet 18 is pressed so as to cause a plurality of fibers 18A to break at a portion of the fiber sheet 18 corresponding to the convex portions 9, and at least one of the broken fibers 18A is Separate some parts from each other. At this time, among the parts where the fibers 18A are broken in the part corresponding to the convex part 9, a part of the fiber sheet 18 closer to the proximal end 9B than the distal end 9A is broken. A slit portion 34 is formed at a portion where the fiber sheet 18 is torn. As a result, a slit portion 34 is formed in the convex portion 9. Note that the low-density portion 12 can be formed in a portion of the fiber sheet 18 that does not break.

(Modification 5)
In the exterior material 1 according to the fourth modification of the first embodiment, as shown in FIG. 9A, the sheet 3 has a slit portion 34 formed in the convex portion 9, but as shown in FIG. 9C, the slit portion An opening hole 36 may be formed instead of 34 (referred to as modification 5 of the first embodiment). The opening hole 36 has a hole structure such as a circular shape whose longitudinal direction is not specified. FIG. 9C is a plan view for explaining an example of modification 5. In the example of FIG. 9C, the opening hole 36 is formed closer to the proximal end 9B than the distal end 9A of the convex portion 9. The position where the opening hole 36 is formed is not limited to this, and may be formed at the tip portion 9A. The opening hole 36 can be formed as a perforation hole by providing a perforation hole at a predetermined position of the convex portion 9 of the fiber sheet 18 .

(Modification 6)
In the exterior material 1 according to the first embodiment, as shown in FIG. 8A, the sheet 3 may have a slit-like structure 35 formed at the tip 9A of the convex part 9 (a modification of the first embodiment). (referred to as Example 6). FIG. 5A is a plan view for explaining an example of modification 6.

(Slit-like structure)
The slit-like structure portion 35 is formed by cutting a portion of the fibers 18A constituting the fiber sheet 18 when a tensile force is applied to the fiber sheet 18 in the plane direction of the fiber sheet 18. Note that the slit-like structure portion 35 differs from the low-density portion 12 in that the fiber sheet 18 is almost completely cut, and the slit portion 34 differs from the low-density portion 12 in that the cut fibers remain overlapped. It is defined as a different part. Similar to the low-density portion 12, the slit-like structure portion 35 prevents changes in the contour shape of the slit-like structure portion 35 when a tensile force is applied to the fiber sheet 18 in the plane direction of the fiber sheet 18. It is preferable that the fibers 18A be present to such an extent that the fibers 18A are present. The slit-like structure portion 35 may be connected to a low-density portion 12, which will be described later, as shown in FIG. 8A. Note that in FIG. 8A, the slit-like structure 35 is formed in a straight line across the tip 9A, but the shape of the slit-like structure 35 is not limited to this. Further, the slit-like structure portion 35 may extend further from the distal end portion 9A toward the proximal end portion 9B side, as shown in FIG. 4B.

The exterior material 1 according to the second embodiment will be explained.

[2 Second embodiment]
[2-1 Configuration]
The exterior material 1 according to the second embodiment includes a sheet 3 in which a first convex portion 22 and a second convex portion 23 are formed as convex portions G, as shown in FIGS. 4A, 4B, and 4C. However, similarly to the first embodiment, at least some of the convex parts G protrude from the surface 3A of the sheet 3 facing the outer circumferential surface of the container body, and the convex parts 9 are provided. The portion 9 also serves as at least a portion of the first convex portion 22 . A low density portion 12 is formed in the convex portion 9 . Furthermore, the exterior material 1 according to the third embodiment has an outward convex portion 37 that protrudes from the sheet 3 in a direction opposite (outward) to the direction toward the inside of the gap 27 between the sheet 3 and the outer peripheral surface of the container body. has.

The second embodiment is the same as the first embodiment except for the outward convex portion 37, so the description of the other components will be omitted. FIG. 4A is a plan view schematically showing an example of the exterior material 1 according to the second embodiment. FIG. 4B is a cross-sectional view schematically showing the state of the vertical cross-section taken along the line DD in FIG. 4A. FIG. 4C is a cross-sectional view schematically showing the state of the vertical cross-section taken along the line EE in FIG. 4A.

(Outward convex part)
In the exterior material 1 according to the second embodiment, the outward convex portion 37 has a convex structure that protrudes from the non-facing surface 3B side of the sheet 3 in a direction away from the outer peripheral surface of the container body. The outward convex portion 37 has a convex surface 137A as a surface protruding toward the non-facing surface 3B, and a concave surface 137B is formed on the facing surface 3A side at a position corresponding to the convex surface 137A. The shape of the concave surface 137B is preferably formed in a shape corresponding to the convex surface 137A.

In the example of FIG. 4A, the outward protrusions 37 include a first outward protrusion 38 provided within the formation area of the second protrusion 23 and a first outward protrusion 38 provided outside the formation area of the second protrusion 23. A second outward convex portion 39 is formed. Note that this is just an example, and only one of the first outward convex portion 38 and the second outward convex portion 39 may be provided. Further, an outward convex portion 37 may be formed so as to straddle the base end portion 23B of the second convex portion 23 (not shown).

(Height of first outward convex portion)
The height of the first outward protrusion 38 is preferably greater than the height of the second protrusion 23. In this case, it is easy to form a state in which the non-facing surface 3B of the first sheet protrudes outward from the position of the peripheral portion 15, so that when the user's hand touches the sheet 3 of the exterior material 1, In addition, the first outward convex portion 38 can be contacted before contacting the peripheral portion 15, and the contact area between the user's hand and the sheet 3 can be expected to be reduced.

(Height of second outward convex portion)
The height of the second outward convex portion 39 is not particularly limited.

From the viewpoint of improving the heat insulation properties of the exterior material 1, at least one of the first outward convex portion 38 and the second outward convex portion 39 is provided with a material similar to the low-density portion 12 of the convex portion 9. Preferably, a low density portion is formed. From this point of view, at least one of the first outward convex portion 38 and the second outward convex portion 39 may be provided with the same configuration as the convex portion 9 except for the direction of protrusion. suitable.

[2-2 Action and effect]
According to the exterior material 1 according to the second embodiment, since the convex portions 9 are formed on the sheet 3, the same effects as in the first embodiment can be obtained.

Further, in the second embodiment, since the outward convex portion 37 is provided on the sheet 3, the surface area of the sheet 3 can be expanded, and the speed at which heat is transmitted to the entire sheet 3 can be suppressed. can.

[3 Third embodiment]
[3-1 Configuration]
The configuration of the exterior material 1 according to the third embodiment will be explained. As shown in FIGS. 13A and 13B, the exterior material 1 according to the third embodiment has a structure in which a top sheet 5 is laminated on the non-facing surface 3B side of the sheet 3 in the first embodiment. The rest is the same as the first embodiment. 13A and 13B show an example in which a topsheet 5 is provided on the exterior material according to the first embodiment shown in FIGS. 1A to 1C, and are views corresponding to FIGS. 1B and 1C, respectively. FIG. 3 is a sectional view for explaining an example of the exterior material 1 according to the third embodiment.

(front sheet)
The top sheet 5 is a sheet material through which visible light can pass. The top sheet 5 may be a transparent sheet or a semi-transparent sheet. When visually observed from one side of the topsheet 5 with the thickness direction of the topsheet 5 as the viewing direction, it is preferable that many sides of the topsheet 5 are transparent. A sheet (fiber sheet) formed from the same paper-based material as the fiber sheet 18 described in the first embodiment may be employed. Moreover, the top sheet 5 may be a non-fibrous sheet defined as a sheet material other than a fiber sheet. Examples of the non-fibrous sheet include resin films and the like.

The method of joining the top sheet 5 and the sheet 3 is not particularly limited. The method for joining the top sheet 5 and the sheet 3, for example, the same method as for joining the outer peripheral surface of the container body and the sheet 3, etc. can be used. For example, it can be manufactured by bonding the top sheet 5 to the non-facing surface 3B. As a bonding method, bonding with an adhesive, a method using heat sealing, etc. can be used as appropriate.

[3-2 Action and effect]
According to the exterior material 1 according to the third embodiment, since the convex portions 9 are formed on the sheet 3, the same effects as in the first embodiment can be obtained.

In addition, in the third embodiment, since the top sheet 5 covers the non-facing surface 3B of the sheet 3, a top sheet 5 on which a printed portion representing a design is formed is used, and the sheet 3 When a design is formed on the second convex portion 23 of the top sheet 5, it becomes possible to recognize the design formed by overlapping the design of the printed portion of the top sheet 5 and the design of the second convex portion 23, and the exterior The design of the material 1 can be improved.

Furthermore, in the third embodiment, since the top sheet 5 is laminated on the sheet 3, the shape of the proximal end portion 9B of the convex portion 9 can be stabilized, and deformation of the shape of the convex portion 9 can be prevented. This makes it possible to prevent the convex portion 9 from collapsing more easily.

[3-3 Modification example]
The example of the exterior material 1 according to the third embodiment shown above has a structure in which the top sheet 5 is laminated on the non-facing surface 3B side of the exterior material 1 in the first embodiment. The third embodiment is not limited to this, and may have a structure in which the top sheet 5 is laminated on the non-facing surface 3B side of the exterior material 1 in the second embodiment, as shown in FIGS. 14A and 14B. good. This form is called a modification of the third embodiment. 14A and 14B show an example in which a topsheet 5 is provided on the exterior material 1 according to the second embodiment shown in FIGS. 4A to 4C, and are views corresponding to FIGS. 4B and 4C, respectively. FIG. 3 is a cross-sectional view for explaining an example of the exterior material 1 according to a modification of the third embodiment.

In a modification of the third embodiment, it is preferable that the outward convex portions 37 of the sheet 3 are joined to the top sheet 5. As for the method of joining the outward protrusions 37 and the topsheet 5, for example, applying an adhesive near the tip of the outward protrusions 37 to bring the outward protrusions 37 of the sheet 3 into contact with the topsheet 5. Then, the top sheet 5 can be bonded to the sheet 3 using an adhesive. In the exterior material 1 according to the second modification of the fourth embodiment, a gap 40 is formed between the sheet 3 and the top sheet 5, as shown in FIGS. 14A and 14B. An air layer is formed in the gap 40.

According to the modification of the third embodiment, the contact area between the sheet 3 and the top sheet 5 can be reduced, and the heat insulation properties can be further improved. Furthermore, according to the modification of the third embodiment, by forming an air layer in the gap 40, the heat insulation properties can be further improved.

[4 Fourth embodiment]
The configuration of the exterior material 1 according to the fourth embodiment will be explained. As shown in FIG. 15A, the exterior material 1 according to the fourth embodiment has a tip of the convex portion 9 that also serves as the first convex portion 22 in the first embodiment, the second embodiment, and the third embodiment. The second embodiment is the same as the first embodiment, the second embodiment, and the third embodiment except that the resin 41 is provided near the portion 9A or the tip portion 9A. FIG. 15A is a cross-sectional view for explaining one example of the exterior material 1 according to the fourth embodiment.

(resin)
The resin 41 is provided at or near the tip 9A of the protrusion 9 that also serves as the first protrusion 22, and is provided on at least a portion of the periphery of the low-density portion 12. The resin 41 may be provided all around the low density portion 12 . Further, the resin 41 may be provided in the low density portion 12. However, the portion of the resin provided in the low-density portion 12 is provided to such an extent that the air permeability of the low-density portion 12 is not lost. It is preferable that the resin 41 penetrates into the inside of the fiber sheet 18.

The material of the resin 41 is not particularly limited, and may be selected depending on conditions such as the usage of the exterior material 1. As the resin, resins that can be used as adhesives can be used, and for example, starch paste or the like may be used as appropriate.

When the exterior material 1 is brought into contact with the outer peripheral surface of the container body, the resin 41 is in a hardened state. Therefore, the shape of the protrusion 9 near the tip 9A has strength, and the protrusion 9 is difficult to collapse even if a strong force is applied to the exterior material 1 from the outside toward the container body, and the low-density portion 12 structure can be made more stable.

[5 Fifth embodiment]
The configuration of the exterior material 1 according to the fifth embodiment will be explained. As shown in FIG. 15B, the exterior material 1 according to the fifth embodiment has the same structure as that of the second convex portion 23 in the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. The second embodiment is the same as the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment except that the re-adhesive resin 42 is provided at or near the tip portion 9A. FIG. 15B is a cross-sectional view for explaining one example of the exterior material 1 according to the fifth embodiment.

(Re-adhesive resin)
A re-adhesive resin 42 is provided at the tip of the second convex portion 23 . The re-adhesive resin 42 provides the exterior material 1 with re-peelability from the container body. By providing the re-adhesive resin 42 at the tip of the second convex portion 23, by strongly pressing the exterior material 1 against the container body, it is possible to form a state in which the exterior material 1 and the container body are fixed. can. Moreover, the adhesive state between the exterior material 1 and the container body is gradually released due to the restoring force of the sheet 3, so that the state in which the exterior material 1 and the container body are fixed is only temporary.

According to the exterior material 1 according to the fifth embodiment, the exterior material 1 can be fixed to the container body with the re-adhesive resin 42 during the time between attaching the exterior material 1 to the container body and carrying it. After carrying the container 500, the second convex portion 23 of the exterior material 1 is separated from the container body, so that the state in which the exterior material 1 efficiently exerts its heat insulating properties can be restored. Furthermore, since the portion that temporarily contacts the container body 502 is the second convex portion 23, heat is not easily transmitted to the peripheral portion 15 of the sheet, and there is a risk that the function of the exterior material 1 may be completely lost when being carried. is also suppressed.

[6 Application examples]
In the first to fifth embodiments described above, the exterior material 1 may constitute a part of the container 500, or may be used separately from the container 500, as shown below. It's okay to be rejected.

(Application example 1)
As shown in FIG. 11, the container 500 has a container body 502 that has a space 505 inside and a bottom 507 below the space 505. In the example of FIG. 11, the container 500 has a container body 502. The container 500 has an opening 501 formed at the upper end side of the container body 502, and has an edge 503 forming the upper end edge of the opening 501. In the example of FIG. 11, the edge 503 is a curled portion formed by winding the member forming the container body 502 outward. In the container 500, an exterior body 550 having a convex portion 551 is formed in a truncated cone shape matching the shape of the outer circumferential surface 504 of the container body 502, and the tip of the convex portion on the inner circumferential surface side of the exterior body 550 is formed on the outer circumferential surface. 504. In the container 500 shown in the example of FIG. 11, an exterior body 550 fixed to the outer circumferential surface 504 of the container body 502 is provided. FIG. 11 is a cross-sectional view for explaining one embodiment of the container 500. The above-described exterior material 1 can be used as the exterior body 550 attached to the container 500.

(Application example 2)
In Application Example 2, as shown in FIG. 12, the exterior body 550 described in Application Example 1 is separated from the container 500 and used as a separate member, and used as a separate sleeve 560. In this case, the exterior material 1 is used as the sleeve 560. FIG. 12 is a perspective view for explaining one embodiment of the sleeve 560. Note that the sleeve 560 may be distributed separately from the container 500, or it may be distributed as a combination of the container 500 and the exterior material 1 without bonding the exterior material 1 as the sleeve 560 to the container. good.

Although the embodiments of the present invention, modifications thereof, and examples of manufacturing methods thereof have been specifically described above, the present invention is not limited to the embodiments, modifications thereof, and examples of manufacturing methods described above. Various modifications are possible based on the technical idea of the present invention.

In addition, the configurations, methods, processes, shapes, materials, numerical values, etc. mentioned in the above-described embodiments, modifications thereof, and examples of manufacturing methods thereof can be combined with each other without departing from the gist of the present invention.

The materials exemplified in the above embodiments can be used alone or in combination of two or more, unless otherwise specified.

Note that the actions and effects exemplified in this specification do not limit the content of the present invention.

The present invention can employ the following configuration.
(E1) Used by being attached to the outer peripheral surface of the container body of a container having a container body,
Formed from a blank material with paper-based material,
having a plurality of convex portions protruding from a surface facing the outer circumferential surface and having a proximal end portion and a distal end portion;
The convex portion includes a plurality of first convex portions and a second convex portion connected to at least two different first convex portions,
The first convex portion protrudes more toward the surface facing the outer circumferential surface than the second convex portion,
At least some of the convex portions have a low-density portion where the density of fibers constituting the paper-based material is lower than the density at the base end portion.
Exterior material.
(E2) A combination structure portion is formed by a combination of the first convex portion and the second convex portion,
The exterior material according to (E1) above.
(E3) At least a portion of the low-density portion formed in at least some of the convex portions extends from the first convex portion to the second convex portion,
The exterior material according to (E1) or (E2) above.
(E4) At least a portion of the low-density portions formed in at least some of the convex portions are formed in the first convex portion or the second convex portion,
The exterior material according to any one of (E1) to (E3) above.
(E5) At least some of the convex portions are
A concealing portion is formed at a position closer to the tip than the low-density portion, extending in a direction transverse to the thickness direction of the blank material and concealing at least a portion of the outer circumferential surface;
the density of the fibers in the low-density portion is lower than the density of the fibers in the concealment portion;
Exterior material for any one of the above (E1) to (E4).
(E6) The low-density portion has a portion where the density of the fibers constituting the paper-based material decreases from the tip end toward the base end.
The exterior material according to any one of (E1) to (E5) above.
(E7) The low-density portion has a portion where the density of the fibers constituting the paper-based material decreases from the base end toward the tip end.
The exterior material according to any one of (E1) to (E6) above.
(E8) The low-density portion includes a portion where the density of the fibers constituting the paper-based material decreases from the distal end to the proximal end, and a portion where the density of the fibers constituting the paper-based material decreases from the proximal end to the distal end. The portions where the density of the fibers constituting the paper-based material is reduced are connected;
The exterior material according to any one of (E1) to (E7) above.
(E9) The convex portion has a concave surface on a side not facing the outer circumferential surface.
The exterior material according to any one of (E1) to (E8) above.
(E10) A slit portion is formed in the convex portion,
The exterior material according to any one of (E1) to (E9) above.
(E11) A top sheet is laminated on the side of the surface not facing the outer peripheral surface.
The exterior material according to any one of (E1) to (E10) above.
(E12) At least some of the convex portions include resin.
The exterior material according to any one of (E1) to (E11) above.
(E13) At least some of the second convex portions include a re-adhesive resin;
The exterior material according to any one of (E1) to (E12) above.
(E14) used as a sleeve attached to the outer peripheral surface;
The exterior material according to any one of (E1) to (E13) above.
(E15) The exterior material according to any one of (E1) to (E14) above is attached to the outer peripheral surface of the container body.
container.
(E16) A container having a container body;
The exterior material according to any one of (E1) to (E14) above,
Combination of container and exterior material.

1 : Exterior material 3 : Sheet 3A : Facing surface 3B : Non-facing surface 5 : Top sheet 9 : Convex part 9A : Tip part 9B : Base end part 9C : Main raised part 9D : Secondary raised part 9D1 : Front part 9D2 : Side surface Part 12 : Low density part 12A : End part 12B : End part 15 : Peripheral part 16 : Compressed part 17 : Flat surface 18 : Fiber sheet 18A : Fiber 19 : First part 20 : Second part 21 : Concealing part 22 : First convex part 22A : Tip part 22B : Base end part 23 : Second convex part 23A : Tip part 23B : Base end part 24 : Combination structure part 27 : Gap 34 : Slit part 35 : Slit-like structure part 36 : Opening hole 37 : Outward convex part 38 : First outward convex part 39 : Second outward convex part 40 : Gap 42 : Re-adhesive resin 43 : Side end part 90 : Convex surface 91 : Concave surface 92A : Convex surface 93A: Convex surface 137A: Convex surface 137B: Concave surface 500: Container 501: Opening 502: Container body 503: Edge 504: Outer surface 505: Space 507: Bottom 550: Exterior body 551: Convex portion 560: Sleeve AH: Air G :Convex part PI :Pitch X1 :Area XS :Dotted chain line

Claims

Used by being attached to the outer peripheral surface of the container body of a container having a container body,
Formed from a blank material with paper-based material,
having a plurality of convex portions protruding from a surface facing the outer circumferential surface and having a proximal end portion and a distal end portion;
At least some of the convex portions include a plurality of first convex portions and a second convex portion connected to at least two different first convex portions,
The first convex portion protrudes more toward the surface facing the outer circumferential surface than the second convex portion,
At least some of the convex portions have a low-density portion where the density of fibers constituting the paper-based material is lower than the density at the base end portion.
Exterior material.
A combination structure portion is formed by a combination of the first convex portion and the second convex portion,
The exterior material according to claim 1.
At least a portion of the low density portion formed in at least some of the convex portions extends from the first convex portion to the second convex portion,
The exterior material according to claim 1.
At least a portion of the low-density portions formed in at least some of the convex portions are formed in the first convex portion or the second convex portion,
The exterior material according to claim 1.
At least some of the convex portions are
A concealing portion is formed at a position closer to the tip than the low-density portion, extending in a direction transverse to the thickness direction of the blank material and concealing at least a portion of the outer circumferential surface;
the density of the fibers in the low-density portion is lower than the density of the fibers in the concealment portion;
The exterior material according to claim 1.
The low-density portion has a portion where the density of the fibers constituting the paper-based material decreases from the tip end toward the base end.
The exterior material according to claim 1.
The low-density portion has a portion where the density of the fibers constituting the paper-based material decreases from the base end toward the tip end.
The exterior material according to claim 1.
The low-density portion includes a portion where the density of the fibers constituting the paper-based material decreases from the distal end to the proximal end, and a portion where the density of the fibers constituting the paper-based material decreases from the proximal end to the distal end. The portions where the density of the fibers constituting the fibers become smaller are connected;
The exterior material according to claim 1.
The convex portion has a concave surface formed on a surface not facing the outer circumferential surface.
The exterior material according to claim 1.
A slit portion is formed in the convex portion,
The exterior material according to claim 1.
A top sheet is laminated on the side of the surface not facing the outer peripheral surface,
The exterior material according to claim 1.
At least some of the convex portions include resin,
The exterior material according to claim 1.
At least some of the second convex portions include a re-adhesive resin;
The exterior material according to claim 1.
used as a sleeve attached to the outer peripheral surface;
The exterior material according to claim 1.
The exterior material according to any one of claims 1 to 14 is attached to the outer peripheral surface of the container body.
container.
a container having the container body;
The exterior material according to any one of claims 1 to 14,
Combination of container and exterior material.