TWM654767U - Exterior material, container, and assembly of container and exterior material - Google Patents

Abstract

Provided is a heat-insulating sheet having excellent heat-insulating performance and using a paper material for at least a portion thereof. The heat-insulating sheet is formed of a paper material having fibers, and comprises a first sheet having a plurality of protrusions on one side thereof and a second sheet facing the protrusions of the first sheet, wherein at least a portion of the protrusions has a base end portion and a low-density portion, and the low-density portion is defined as a density of the fibers constituting the paper material, i.e., a fiber density that is smaller than the fiber density in the base end portion.

Description

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

This new type relates to exterior decoration materials, containers, and combinations of containers and exterior decoration materials.

When a container contains high-temperature contents, it is required to slow down the temperature rise rate of the outer surface of the container. In addition, when a container contains low-temperature contents, it is required to suppress frost on the outer surface of the container. Based on these situations, the container is required to improve the heat insulation of the outer surface. The contents mentioned here include beverages such as coffee, foods such as noodles, and ice cubes.

In response to the above requirements, the following solutions are proposed in Patent Documents 1 and 2: a sleeve is provided as an outer material in a manner that surrounds the outer periphery of the container, a convex portion is provided that protrudes toward the opposite side of the sleeve that is opposite to the outer periphery, and a space is formed between the sleeve and the outer periphery of the container to improve heat insulation.

[Prior Art Literature]

[Patent Literature]

Patent document 1: Japanese Utility Model Publication No. 50-031073

Patent document 2: Japanese Patent Publication No. 2014-513650

In Patent Documents 1 and 2, there is still 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 the container having the same structure as the sleeve.

In addition, when a high-temperature item is contained in a sleeve-equipped container as a content, there is still room for improvement in terms of the time that the heat insulation can be fully maintained and the temperature rise rate of the outer peripheral surface of the container being slowed down. For example, when a high-temperature content is contained in a container, if the temperature rise rate of the outer peripheral surface of the container is fast, it is difficult to carry the container while holding the outer peripheral surface of the container. Assume that when the container is held in the hand and carried, for example, the container is carried while being held from top to bottom by the fingers by clamping the fingers at the lower and upper ends of the container. In this case, since the fingers touch the upper end of the container, there is a possibility that the contents of the container touch the fingers, and there is a concern that the fingers may be burned.

In addition, in the technologies disclosed in Patent Documents 1 and 2, when low-temperature items are stored as contents, the time required for frost to form on the outer surface of the container is short, and there is room for improvement. For example, when low-temperature contents are stored in a container, if frost forms on the outer surface of the container immediately, when the outer surface of the container is held by hand, there is a concern that the container may slip from the hand.

This new type is made in view of the above points, and its purpose is to provide an exterior material, a container, and a combination of a container and an exterior material that are easy to improve in design and have excellent heat insulation.

This new model is based on the following new models (1) to (15).

(1) An exterior material, which is mounted on the outer peripheral surface of a container having a container body, the exterior material being formed of a blank material having a paper material, the exterior material having a plurality of protrusions protruding toward an opposite surface side opposite to the outer peripheral surface and having a base end and a front end, the exterior material having a plurality of first protrusions and second protrusions connected to at least two different first protrusions as at least a part of the protrusions, the first protrusions protruding further toward the opposite surface side opposite to the outer peripheral surface than the second protrusions, at least a part of the protrusions having a low-density portion, the density of fibers constituting the paper material in the low-density portion being lower than the density in the base end.

(2) The exterior material according to (1) above, wherein a combined structural portion is formed by a combination of the first convex portion and the second convex portion.

(3) According to the exterior material described in (1) above, at least a portion of the low-density portion formed on at least a portion of the convex portion extends from the first convex portion to the second convex portion.

(4) According to the exterior material described in (1) above, at least a portion of the low-density portion formed on at least a portion of the convex portion is formed on the first convex portion or the second convex portion.

(5) According to the exterior material described in (1) above, at least a portion of the convex portion is formed with a shielding portion at a position closer to the front end portion than the low-density portion, the shielding portion extends in a direction transverse to the thickness direction of the blank material and shields at least a portion of the outer peripheral surface, and the density of the fiber in the low-density portion is lower than the density of the fiber in the shielding portion.

(6) According to the exterior material described in (1) above, the low-density portion has a portion where the density of the fibers constituting the paper material decreases from the front end portion toward the base end portion.

(7) According to the exterior material described in (1) above, the low-density portion has a portion where the density of the fibers constituting the paper material decreases from the base end portion toward the front end portion.

(8) According to the exterior material described in (1) above, in the low-density portion, a portion where the density of the fibers constituting the paper material decreases from the front end portion toward the base end portion and a portion where the density of the fibers constituting the paper material decreases from the base end portion toward the front end portion are connected.

(9) According to the exterior material described in (1) above, the convex portion has a concave surface formed on the non-opposing side that is not opposite to the outer peripheral surface.

(10) According to the exterior material described in (1) above, a slit portion is formed on the convex portion.

(11) According to the exterior material described in (1) above, a surface sheet is laminated on the non-opposing side that is not opposite to the outer peripheral surface.

(12) According to the exterior material described in (1) above, at least a portion of the protrusion has a resin.

(13) According to the exterior material described in (1) above, at least a portion of the second protrusion has a re-adhesive resin.

(14) The exterior material according to (1) above is used as a sleeve mounted on the outer peripheral surface.

(15) A container, wherein the exterior material described in any one of (1) to (14) above is installed on the outer peripheral surface of the container body.

(16) A combination of a container and an exterior material, comprising: a container having the container body; and an exterior material as described in 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 an exterior material that can improve design. For example, by setting the second convex portion to a layout corresponding to text and a specific design, it is possible to obtain an exterior material with a design imitating specific text and an exterior material with a design corresponding to the specific design, thereby obtaining 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 an exterior material with excellent heat insulation. Specifically, even when a user holds a container containing high-temperature contents in his hand and carries the container, it is possible to reduce the need to carry the container while holding the container from top to bottom with fingers, for example, thereby suppressing the possibility of the contents of the container touching the fingers and suppressing the risk of the fingers being burned by the high-temperature contents.

In addition, according to the present invention, when a low-temperature item is stored as the content, frost is unlikely to form on the outer surface of the container. Therefore, according to the present invention, for example, when a low-temperature content is stored in the container, the risk of the container slipping from the hand due to frost can be suppressed when the outer surface of the container is held by hand.

1:Exterior materials

3: Sheet

3A: Opposite sides

3B: Non-opposite sides

5: Surface sheet

9: convex part

9A: Front end

9B: Base end

9C: Main ridge

9D: Secondary protuberance

9D1: Front part

9D2: Lateral face

12: Low density part

12A: End

12B: End

15: Peripheral area

16: Compression section

17: Flat surface

18: Fiber sheets

18A: Fiber

19: Part 1

20: Part 2

21: Shielding part

22: The first convex part

22A: Front end

22B: Base end

23: Second convex part

23A: Front end

23B: Base end

24: Assembly structure department

27: Gap

34: Narrow seam

35: Slit structure

36: Opening hole

37: Outward convex part

38: The first outward convex part

39: The second outward convex part

40: Gap

42: Re-adhesive resin

43: Side end

90: convex

91: Concave

92A: convex

92B: Concave

93A: convex

93B: Concave

137A: convex

137B: Concave

500:Container

501: Opening

502: Container body

503: Fate

504: Outer surface

505: Space Department

507: Bottom

550:External body

551: convex part

560: Sleeve

AH: Air

G: convex part

H1: Height

H2: Height

PI: Pitch

X1: Area

XS: One-point chain

In [Figure 1], Figure 1A is a top view of an embodiment for explaining the first embodiment. Figure 1B is a cross-sectional view schematically showing the state of the longitudinal section along the A-A line in Figure 1A. Figure 1C is a cross-sectional view schematically showing the state of the longitudinal section along the B-B line in Figure 1A.

In [Figure 2], Figure 2A is a top view of an embodiment for illustrating the first embodiment. Figure 2B is a cross-sectional view schematically showing the state of the longitudinal section along the C-C line in Figure 2A.

[Figure 3] is a top view of an example for explaining the first embodiment.

In [Figure 4], Figure 4A is a top view of an embodiment for explaining the second embodiment. Figure 4B is a cross-sectional view schematically showing the state of the longitudinal section along the D-D line in Figure 4A. Figure 4C is a cross-sectional view schematically showing the state of the longitudinal section along the E-E line in Figure 4A.

[Figure 5A] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Fig. 5B] is a cross-sectional view for explaining the longitudinal section along the F-F line in Fig. 5A and a partially enlarged cross-sectional view for explaining the state in which the portion circled by the one-point link line XS is enlarged.

[Figure 5C] is a cross-sectional view of an embodiment for explaining the portion where the protrusion contacts the outer peripheral surface of the container body when the outer body is mounted on the container body.

[Figure 6] is an enlarged cross-sectional view of area X1 of B in Figure 1.

[Figure 7A] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 7B] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 7C] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 8A] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 8B] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 9A] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[FIG. 9B] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 9C] is a top view for explaining an embodiment of a convex portion having a low-density portion in the first embodiment.

[Figure 10] is a top view of an example for explaining the first embodiment.

[Figure 11] is a cross-sectional view for explaining an embodiment of a container equipped with an exterior material.

[Figure 12] is a three-dimensional diagram for explaining an embodiment of using an exterior material as a sleeve.

In [Figure 13], A and B of Figure 13 are top views of an example of an embodiment for explaining the third embodiment.

In [Figure 14], A and B of Figure 14 are top views of an example for explaining the third embodiment.

In [Figure 15], Figure 15A is a cross-sectional view of an embodiment for illustrating the fourth embodiment. Figure 15B is a cross-sectional view of an embodiment for illustrating the fifth embodiment.

Hereinafter, the first embodiment, the second embodiment, the third embodiment, the fourth embodiment, and the fifth embodiment will be described with reference to the drawings. In addition, the description will also be made with reference to application examples.

In this manual and drawings, components with substantially the same functional structure are marked with the same figure mark to omit repeated description.

The following description is a preferred specific example of the present invention, and the content of the present invention is not limited to these implementation forms, etc. In addition, in the following description, the directions such as front and back, left and right, up and down, and the direction of the horizontal plane are indicated for the convenience of explanation, but the content of the present invention is not limited to these directions. In the example of Figure 1, the Z-axis direction is set as the up and down direction (the upper side is the +Z direction, and the lower side is the -Z direction), and the directions along the X-axis and the Y-axis that are orthogonal to each other on the plane with the Z-axis direction as the normal are set as the X-axis direction and the Y-axis direction, and the plane formed by the X-axis and the Y-axis, that is, the XY plane, is a horizontal plane, and the description is based on these. Regarding the X-axis, Y-axis, and Z-axis, the same is true in the figures other than Figure 1 (Figures 2 to 15). The relative size ratios of the dimensions shown in Figures 1 to 15 are recorded for convenience, and the actual size ratios are not limited unless otherwise specified.

[1 First implementation form]

[1-1 Composition]

The exterior material 1 of the first embodiment can be used by being mounted on the outer peripheral surface of a container having a container body (hereinafter sometimes referred to as a body). As described based on FIG. 1 , FIG. 5A and FIG. 6 , the exterior material 1 has a sheet 3 serving as a base material, and a plurality of protrusions G having a base end and a front end that protrude from the sheet 3 to the opposite side of the outer peripheral surface when mounted on the outer peripheral surface of the container body. The exterior material 1 has a plurality of first protrusions 22 as the protrusions G, and a second protrusion 23 connected to at least two different first protrusions. FIG. 1A is a perspective view showing an embodiment of the exterior material 1 of the first embodiment. FIG. 1B is a cross-sectional view showing an embodiment corresponding to the A-A line section in FIG. 1A for the exterior material 1 of the first embodiment. FIG1C is a diagram showing an embodiment corresponding to the cross section along the line B-B in FIG1A, and is a cross-sectional view for explaining an example of the second protrusion 23. FIG6 is a diagram schematically showing an enlarged state of the region X1 in FIG1B. FIG5A shows an example in which the first protrusion 22 has a structure corresponding to the protrusion 9 shown in FIG1B.

(convex part)

In the exterior material 1, at least a portion of the convex portion G has a low-density portion 12 described later. In the first embodiment, at least with respect to the first convex portion 22, the low-density portion 12 is formed on at least a portion of the first convex portion 22 as an example. However, this does not prohibit the low-density portion 12 from being formed on the second convex portion 23. In addition, from the viewpoint of further improving the effect of the present invention, it is preferred that the low-density portion 12 is formed on the first convex portion 22. In addition, as shown in the example of A in FIG. 1, all the first convex portions 22 may be connected to the second convex portions 23, or a portion of the first convex portions 22 may be connected to the second convex portions 23.

(Shape of exterior materials)

The exterior material 1 has a structure capable of being mounted on the outer peripheral surface 504 of the container body 502 of the container 500. The exterior material 1 can be formed into a sheet shape, and when mounted on the container body 502 of the container 500, it is molded into a shape corresponding to the shape of the outer peripheral surface 504 of the container body 502.

For example, when the container 500 has an opening on the upper surface side capable of being filled with coffee or the like and has a cylindrical outer peripheral surface 504 that tapers downward, as shown in FIG. 10 , the exterior material 1 is formed as a fan-shaped sheet, and by bonding the two ends (side end portions 43) of the fan-shaped sheet with an adhesive or the like, it can be a structure that can be easily attached to the container body 502 of the container 500. FIG. 10 is a top view showing an embodiment of the exterior material 1. This structure is realized, for example, by attaching a double-sided adhesive tape to one side end portion 43 and overlapping the other side end portion 43 to thereby bond both side end portions 43 via the adhesive tape. For the sake of convenience, FIG. 10 shows a case where all the first protrusions 22 also serve as the protrusions 9 and the secondary protrusions 9D are formed on the protrusions 9. However, this is only an example, and the exterior material 1 may be fixed to the container body 502 to constitute a part of the container 500 as described later, or may be a sleeve 560 that is pre-set to a shape corresponding to the shape of the outer peripheral surface 504 of the container body 502 and is a component independent of the container 500.

(Sheet)

The sheet material 3 serving as the base material for forming the convex portion G is composed of a fiber sheet 18 at least a portion of which is formed of a paper material. In the example of FIG. 1 , the sheet material 3 is formed entirely of a paper material. That is, in this example, the fiber sheet 18 is a paper sheet formed of a paper material. As the paper material forming the fiber sheet 18 (the material of the fiber sheet 18), in addition to the so-called paper made by bonding plant fibers and other fibers, chemical fiber paper, synthetic paper, water-resistant paper, copperplate paper, substitute paper, parchment paper, wool paper, glass fiber paper, stone paper, ceramic paper, etc. can be cited. The paper material can be recycled paper or non-recycled paper. In addition, as the material of the sheet material 3, as long as a material having a fiber material is used, the use of non-paper materials is not prohibited. As non-paper materials, woven materials (woven materials and non-woven materials) can be cited. As non-woven materials, for example, so-called airflow mesh sheets formed by combining layered pulverized pulp with air flow to form a sheet, pulp materials, natural fiber materials, synthetic fibers, and other fibers can be cited. As the material of the fiber sheet 18, a material obtained by combining a paper material with a non-paper material can also be used.

(1st convex part)

In the exterior material 1, the first protrusion 22 protrudes further toward the opposite surface side relative to the outer peripheral surface than the second protrusion 23. As shown in A, B, C, etc. of FIG. 1, at least a portion of the first protrusion 22 is connected to the second protrusion 23. As shown in FIG. 6, in at least a portion of the first protrusion 22, a low-density portion 12 is formed between the front end portion 22A and the base end portion 22B. In addition, in A, B, C of FIG. 1 and FIG. 6, the figure mark 92A represents the convex surface of the first protrusion 22, and the figure mark 92B represents the concave surface of the first protrusion 22.

In the example of B in FIG. 1 , the first protrusion 22 is formed in a shape that protrudes from above the second protrusion 23 in the same direction as the protruding 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 front end 22A of the first protrusion 22 is formed at a position that protrudes further from above the second protrusion 23. In addition, the peripheral portion 15 is formed by a portion other than the first protrusion 22 and the second protrusion 23, and in the example shown in A in FIG. 1 , it is formed between adjacent second protrusions 23.

However, in the case of forming a shape protruding from above the second protrusion 23 in the same direction as the protruding direction of the second protrusion 23, the base end 22B of at least a portion of the first protrusion 22 in the sheet 3 may be formed at a position deviated from the second protrusion 23. In addition, at least a portion of the base end 22B may be consistent with the base end 23B of the second protrusion 23. For example, in the example shown in A and B of FIG. 2 , a portion of the base end 22B of the first protrusion 22 formed near the end along the longitudinal direction of the second protrusion 23 is consistent with the base end 23B of the second protrusion 23. FIG. 2 A is a top view schematically showing an embodiment of the exterior material 1 of the second embodiment. FIG. 2 B is a cross-sectional view showing the state of the longitudinal section along the C-C line in FIG. 2 A, and is a diagram showing the first protrusion 22 and the second protrusion 23.

(Second convex part)

The sheet 3 has a plurality of second protrusions 23. The second protrusions 23, like the first protrusions 22, protrude from the sheet 3 toward the opposite surface 3A side opposite to the outer peripheral surface 504 when mounted on the outer peripheral surface 504 of the container body 502. In addition, as shown in C of FIG. 1 , the second protrusions 23 are formed in a region that includes at least two different first protrusions 22. The second protrusions 23 are formed in a manner that connects at least two different first protrusions 22. In the example of A and B of FIG. 1 , the second protrusions 23 are formed in a manner that connects two adjacent different first protrusions 22. In addition, in A and B of FIG. 1 , the figure mark 93A represents the convex surface of the second protrusion 23, and the figure mark 93B represents the concave surface of the second protrusion 23. The figure mark 23A represents the front end portion of the second protrusion 23, and the figure mark 23B represents the base end portion of the second protrusion. These are also shown in Figure 1 C, Figure 2 A, B, Figure 3, etc.

Here, the first protrusion 22 adjacent to a first protrusion 22 refers to the first protrusion 22 directly facing the first protrusion 22.

As shown in B of FIG. 1 , the two first protrusions 22 can be connected by forming a layout such that the first protrusion 22 is formed on the second protrusion 23, but the second protrusion 23 is not limited to this layout. Alternatively, the second protrusion 23 may be formed in a manner that connects the convex surfaces 92A of the two first protrusions 22. In this case, a portion of the base end portion 22B of the first protrusion 22 is formed at a position offset from the second protrusion 23.

(Second convex part)

In the example shown in A of FIG. 1 , the second protrusion 23 is formed in a strip-shaped shape extending obliquely, and is formed in a manner that a plurality of second protrusions 23 are arranged at intervals. Each second protrusion 23 connects the first protrusions 22 adjacent to each other obliquely, and a plurality of first protrusions 22 are formed along the long side direction of the second protrusion 23 on the upper side (convex surface 93A side) of the second protrusion 23. At this time, on the upper side of the second protrusion 23, a plurality of first protrusions 22 are arranged at a predetermined interval. The intervals between adjacent first protrusions 22 may be fixed or different.

(Shape of the second convex part)

In the example of C in FIG. 1 , the shape of the second protrusion 23 is formed into a trapezoidal cross-section. In addition, the shape of the second protrusion 23 is not limited to the example of C in FIG. 1 , and may be other shapes. For example, the shape of the second protrusion 23 may be a U-shaped cross-section, a rectangular cross-section, a mountain-shaped cross-section, or an indeterminate shape. The shape of the second protrusion 23 when viewed from above is formed in A in FIG. 1 as a strip extending into a straight line, but it is not limited to this case, and the shape of the second protrusion may be a bent line or a curve. In addition, the shape of the second protrusion is not limited to a strip, and may be a dot matrix or a rectangle.

(Height of the second convex part)

As shown in FIG. 1B , the height (height difference from the peripheral portion 15 to the front end portion 23A) (H2) of the second protrusion 23 is formed to be lower than the overall height (height difference from the peripheral portion 15 to the front end portion 22A) (H1) of the first protrusion 22. Thus, when the exterior material 1 is mounted on the outer peripheral surface 504 of the container body 502, the front end portion 9A of the first protrusion 22 can be in contact with the outer peripheral surface 504 of the container body 502, and the second protrusion 23 can be separated from the outer peripheral surface 504 of the container body 502. By forming the second protrusion 23 to be lower in height than the first protrusion 22, the risk of excessive increase in the contact area between the sheet 3 and the outer peripheral surface 504 of the container body 502 can be suppressed, and the heat insulation of the sheet 3 can be maintained.

(Formation of the first convex portion and the second convex portion)

The first protrusion 22 can be formed as an embossing portion (first convex embossing portion) formed by embossing. The second protrusion 23 can be formed as an embossing portion (second convex embossing portion) formed by embossing. The second protrusion 23 can be formed integrally with the first protrusion 22 when the first protrusion 22 is formed by embossing. In addition, the first protrusion 22 and the second protrusion 23 can also be embossed individually.

(The spacing and layout of the protrusions G)

The pitch of the convex portions G is not particularly limited, but is preferably larger than the outer diameter (diameter) of the base end portion of the convex portion G. As shown in the example of A in FIG. 1 , the pitch of the convex portions G represents the center pitch of adjacent convex portions. By making the pitch PI of the convex portions G large, it is possible to form a state in which the adjacent convex portions 9 are slightly separated. In addition, when the convex portions 9 are slightly separated, it is easy to form the low-density portion 12 described later in the manufacturing process of the sheet 3. In addition, the pitch of adjacent convex portions 9 can be fixed (equal) or uneven. A to C in FIG. 1 are diagrams showing an embodiment of the layout of the convex portions 9. In FIG. 1 A, the convex portions 9 are arranged in a saw-tooth shape with uniform pitch. In addition, the convex portions 9 can also be arranged in a grid shape with uniform pitch.

(Convex portion with low density portion)

The structure of the convex portion 9 having the low-density portion 12 formed therein among the convex portions G formed on the sheet 3 is described. FIGS. 5A to 9C are diagrams for describing the convex portion 9 having the low-density portion 12 formed therein. At least a portion of the convex portion 9 also serves as the first convex portion 22. FIGS. 5A to 5C and FIG. 6 show an example of the case where the convex portion 9 also serves as the first convex portion 22.

As described above, the sheet 3 has a plurality of protrusions 9 on one side. The protrusions 9 protrude toward the opposite surface 3A of the sheet 3 that is opposite to the outer peripheral surface of the container body. The protrusions 9 have a base end 9B and a front end 9A.

In addition, in the exterior material 1 shown in the examples of FIG. 5A and FIG. 5B, the protrusions 9 are formed in a dot matrix shape when the sheet 3 is viewed from above, and the base ends 9B of the adjacent protrusions 9 are separated for at least a portion of the protrusions 9. However, this is only an example, and a portion of the protrusions 9 may be formed in a shape different from the dot matrix shape. In addition, the base ends 9B of the adjacent protrusions 9 may be connected.

(Shape of the convex part)

As shown in Figs. 5A, 5B, and 6, the shape of the convex surface 90 of the convex portion 9 is a shape having a portion (sometimes referred to as a secondary convex portion 9D) convexed toward the front end side of the main convex portion 9C formed in a roughly dome shape. However, Figs. 5A, 5B, and 6 are a top view and a cross-sectional view showing an embodiment of the convex portion 9. Fig. 5A is an enlarged top view schematically showing a portion of the convex portion 9. Fig. 5B schematically shows the state of the longitudinal section along the F-F line in Fig. 5A, and is an enlarged cross-sectional view showing the convex portion 9 and its surroundings. In addition, the convex portion 9 shown in Figs. 5A and 5B is an example, and the shape of the convex portion 9 is not limited. For example, the shape of the main convex portion 9C of the convex portion 9 may also be a pyramid shape such as a triangular pyramid shape or a quadrangular pyramid shape, a pyramid shape, a column shape, or the like. In addition, when the shape of the main raised portion 9C is a pyramidal shape such as a triangular pyramid or a quadrangular pyramid, a pyramidal shape, a columnar shape, etc., the secondary raised portion 9D can also be formed on the front end side of the protrusion 9. The shape of the secondary raised portion 9D is a disk shape in the example of Figures 5A and 5B, but this is only an example and is not limited to the shapes of Figures 5A and 5B.

(base end)

The base end portion 9B of the protrusion 9 is formed by the portion of the protrusion 9 that rises from the peripheral portion 15 formed on the outer side of the protrusion 9. The peripheral portion 15 is formed between adjacent protrusions 9. In the examples of A and B in FIG. 1 and B in FIG. 2 , the portion of the sheet 3 other than the protrusion 9 becomes the peripheral portion 15.

(Front end)

The front end portion 9A of the convex portion 9 can be defined as a prescribed portion (the front end and its adjacent portion) including the front end of the convex portion 9. In the example of FIG. 5A and FIG. 5B, the prescribed portion of the convex portion 9 including the center of the secondary ridge 9D (the front portion 9D1 of the secondary ridge 9D) becomes the front end portion 9A of the convex portion 9. The front end portion 9A becomes a portion where fibers exist, and becomes a portion where a plurality of the fibers constituting the paper material pass horizontally.

(Compression section)

The configuration of the front end portion 9A of the convex portion 9 is not particularly limited, but it is preferred that the compression portion 16 is formed at the front end portion 9A. The compression portion 16 is a portion where the compression rate of the fiber sheet 18 used to form the sheet 3 is higher than that of the base end portion 9B. In the example of FIG. 5A and FIG. 5B, the portion of the entire convex portion 9 other than the base end portion 9B and the low-density portion 12 becomes the compression portion 16. Therefore, in this example, the compression portion 16 is formed at least at the front end portion 9A. If the compression portion 16 is formed at least at the front end portion 9A, a tough state is formed at at least the front end portion 9A of the convex portion 9, and the shape of the convex portion 9 is difficult to collapse when the front end portion 9A is in contact with the outer peripheral surface of the container body, which can reduce the risk of unnecessary increase in the contact area between the convex portion 9 and the outer peripheral surface of the container body due to the collapse of the shape of the convex portion 9.

(Thickness of compression part)

The thickness of the compression portion 16 is preferably thinner than the thickness of the base end portion 9B. This structure can be achieved by pressing the portion corresponding to the compression portion 16 with a predetermined pressure higher than the portion corresponding to the base end portion 9B when the fiber sheet 18 described later is subjected to embossing.

(Flat surface)

As shown in the examples of FIG. 5A and FIG. 5B, it is preferable that a flat surface 17 is formed at the front end 9A of the protrusion 9. When the flat surface 17 is formed at the front end 9A, when the sheet 3 is joined to the outer peripheral surface of the container body, it is easy to stably form a state in which the front end 9A and the outer peripheral surface of the container body are in surface contact. However, this does not limit the sheet 3 to the case where the front end 9A of the protrusion 9 is a flat surface 17. The front end 9A of the protrusion 9 in the sheet 3 may also have a concave surface or a convex surface.

(Low density part)

As shown in Fig. 5A and Fig. 5B, at least a part of the plurality of protrusions 9 has a low-density portion 12. The low-density portion 12 can be defined as a portion where the density of the fiber 18A forming the paper material (fiber density) is smaller than the density of the fiber 18A in the base end portion 9B (fiber density). The density of the fiber 18A forming the paper material indicates the density of the fiber 18A constituting the fiber sheet 18 in the state after the sheet 3 is formed.

In the example of FIG. 5A and FIG. 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 front end portion 9A. In the example of FIG. 5A and FIG. 5B, the low-density portion 12 is formed along the convex surface 90 of the convex portion 9 at a position closer to the side of the base end portion 9B than the outer periphery of the front end portion 9A, that is, formed on the side surface 9D2 of the secondary protrusion 9D.

The low-density portion 12 is preferably a portion having a density lower than the density (fiber density) of the fiber 18A in the front end portion 9A. In addition, the low-density portion 12 is preferably a portion having a density lower than the density of the fiber 18A in the peripheral portion 15. However, the low-density portion 12 is set to be a portion where a plurality of fibers 18A exist. In addition, the low-density portion 12 is preferably a portion where the fiber 18A exists to a degree that limits the change in the contour shape of the low-density portion 12 when a pulling force is applied to the fiber sheet 18 along the surface direction of the fiber sheet 18, similarly to the slit-shaped structural portion 35 described later. In addition, the low-density portion 12 is preferably a portion where the fibers 18A exist to such an extent that the fibers 18A near the contour position of the low-density portion 12 are restricted from being displaced outward from the convex surface 90 of the convex portion 9.

(Fiber density)

The fiber density (density of the fiber 18A) indicates the bulk density. For example, it is possible to cut a predetermined portion of the convex portion 9 and measure the basis weight and thickness of the cut portion, and to identify the fiber density based on the value obtained by dividing the basis weight by the thickness (basis weight/thickness).

The cut portion can be determined according to the portion to be specified. For example, a predetermined portion from a plurality of locations arbitrarily selected from the base end portion 9B can be cut, and the density of the fiber 18A of the base end portion 9B can be determined as the arithmetic mean of the density of the fiber 18A in the cut portion. The front end portion 9A can be cut, and the density of the fiber 18A of the front end portion 9A can be determined as the density of the fiber 18A in the cut portion. In addition, a predetermined portion from a plurality of locations arbitrarily selected from the peripheral portion 15 can be cut, and the density of the fiber 18A of the peripheral portion 15 can be determined as the arithmetic mean of the density of the fiber 18A in the cut portion. However, the method of specifying the fiber density described here is an example, and it does not prohibit the use of other methods. In addition to the above methods, light transmittance measurement can also be used as a specific method to identify the situation where the fiber density decreases.

(Shape of low-density part)

The shape of the low-density portion 12 is not particularly limited, but in the examples of FIG. 5A, FIG. 5B, and FIG. 6, in the vertical position (position in the Z-axis direction), a crack extending in a curved line along the XY plane direction is formed at a position between the base end 9B of the convex portion 9 and the front end 9A. In addition, the low-density portion 12 is formed in a crack shape, indicating that the portion where the amount of fiber 18A decreases in the visual appearance of the fiber sheet 18 extends in a linear shape. In this case, the linear shape includes a straight line shape, a curved line shape, and a combination of these.

The low-density portion 12 is preferably formed in a manner that surrounds the front end portion 9A of the protrusion 9. In the examples of FIG. 5A and FIG. 5B, the low-density portion 12 is formed in a manner that surrounds the entire periphery of the front end portion 9A of the protrusion 9 when the sheet 3 is viewed from above. However, this does not limit the layout of the low-density portion 12. For example, as shown in FIG. 7A, the low-density portion 12 may also have a portion extending from the front end portion 9A of the protrusion 9 toward the base end portion 9B. As shown in FIG. 7B, the low-density portion 12 may also be formed in a portion of the periphery of the front end portion 9A of the protrusion 9. In addition, the low-density portion 12 may also be formed at different positions along the convex surface 90 of the protrusion 9. For example, as shown in FIG. 7C, a plurality of low-density portions 12 may be formed at a distance from a position close to the front end portion 9A of the protrusion 9 and a position close to the base end portion 9B.

(part 1)

The low-density portion 12 preferably 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 fiber 18A made of the paper material forming the convex portion 9 decreases from the front end portion 9A toward the base end portion 9B. In the example of FIG. 5B , the first portion 19 is formed at a position on the side of the end portion 12A close to the front end portion 9A in the low-density portion 12.

For example, the first portion 19 is divided into a plurality of equal-sized sections and the density in each section is determined, and the density in the section close to the front end 9A and the density in the section close to the base end 9B are compared, thereby determining that the fiber density is reduced.

(part 2)

The low-density portion 12 preferably 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 fiber 18A formed of the paper material forming the convex portion 9 decreases from the base end portion 9B toward the front end portion 9A. In the example of FIG. 5B , the second portion 20 is formed at a position on the side of the end portion 12B close to the base end portion 9B in the low-density portion 12.

For the second part 20, for example, it can be determined that the fiber density is reduced in the same manner as in the first part 19.

(Position relationship between Part 1 and Part 2)

The low-density portion 12 is preferably formed such that the first portion 19 and the second portion 20 are connected. That is, in the low-density portion 12, it is preferred that the portion where the fiber density of the fiber 18A constituting the paper material decreases from the front end portion 9A toward the base end portion 9B and the portion where the fiber density of the fiber 18A constituting the paper material decreases from the base end portion 9B toward the front end portion 9A are connected.

In addition, in the low-density portion 12, a portion where the fiber density is approximately constant may be sandwiched between the first portion 19 and the second portion 20. The portion where the fiber density is approximately constant includes not only a portion where the fiber density is uniform, but also a portion where the deviation of the fiber density is smaller than that of the first portion 19 and the second portion 20.

(Not opposite)

In the sheet 3, on the non-opposite surface 3B side that is not opposite to the outer peripheral surface 504 of the container body 502, in the example of FIG. 5A and FIG. 5B, a concave surface 91 is formed in the portion (back side) corresponding to the convex surface 90 of the convex portion 9. The concave surface 91 can be formed into a shape corresponding to the convex surface 90 of the convex portion 9. Therefore, a formation area of a plurality of concave surfaces 91 is formed on the non-opposite surface 3B. The layout and spacing of the formation area of the plurality of concave surfaces 91 correspond to the layout and spacing of the convex portion 9. However, this is an example of the non-opposite surface 3B, and a convex structure can also be formed on the non-opposite surface 3B as described later.

(Shielding part)

Preferably, the convex portion 9 is provided with a shielding portion 21 at a position closer to the front end portion 9A than the low-density portion 12. The shielding portion 21 restricts the outer peripheral surface 504 of the container body 502 from being exposed from the exposed surface side of the sheet 3. Here, as the shielding portion 21, in addition to the case where the outer peripheral surface of the container body is completely shielded from the outside, it also includes the case where a part or all of the outer peripheral surface 504 of the container body 502 can be viewed through the shielding portion 21 from the exposed surface side of the sheet 3. The shielding portion 21 is preferably formed in a manner extending in a direction intersecting with the thickness direction of the sheet 3. In addition to being formed in a flat plate shape, the shielding portion 21 can also be formed in a curved and bent shape. The shielding 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 shielding portion 21 may be formed in a portion of the convex portion 9 that includes at least a portion of the front end portion 9A. In addition, the front end portion 9A may also serve as the shielding portion 21, or the shielding portion 21 may be formed in a portion of the front end portion 9A. The shielding portion 21 may be formed by a portion that includes the front end portion 9A. In the example of FIG. 5A and FIG. 5B, the front end portion 9A also serves as the shielding portion 21. In addition, in the case where the front end portion 9A includes the shielding portion 21 (it may be either a case where the shielding portion 21 is formed on the inner side of the front end portion 9A or a case where a portion of the shielding portion 21 is formed in the front end portion 9A), the case where the front end portion 9A has a gap and a hole in addition to the shielding portion 21 is included by forming a gap and a hole in the front end portion 9A.

〔1-2 Manufacturing method〕

Next, the manufacturing method of the exterior material 1 of the first embodiment is described. A sheet of paper material (referred to as a fiber sheet 18) forming the sheet 3 is prepared. The exterior material 1 can be obtained by forming a convex portion G by subjecting the sheet material forming the sheet 3 to, for example, a specific embossing process. In this case, the convex portion G is formed as a convex embossed portion, a convex surface is formed on the opposite surface 3A side, and a concave surface is formed at a position on the non-opposite surface 3B side corresponding to the formed portion of the convex surface. The concave surface can be formed into a shape corresponding to the convex surface of the convex surface.

The low-density portion 12 of the convex portion 9 in the convex portion G can be formed by setting various conditions such as the conditions for the embossing process and the shape of the mold. In addition, the sheet material is not particularly limited as long as it can form the convex portion 9 and uses a sheet of paper material (fiber sheet 18), and can be a sheet with a flat surface or a sheet with an uneven surface. As an example of a sheet with an uneven surface, a sheet with continuous concave and convex surfaces such as a fine wavy surface (a wavy surface with a height smaller than that of the first convex portion 22 and the second convex portion 23) can be cited.

During the embossing process, the fiber 18A constituting the fiber sheet 18 is locally fluffed at a predetermined portion in the protrusion 9, or the fiber 18A is locally cut at a predetermined portion in the protrusion 9, thereby forming the low-density portion 12. For example, in the process of the embossing process, before the portion of the fiber sheet 18 corresponding to the front end portion 9A of the protrusion 9 is perforated, it is clamped by the embossing mold, and the embossing mold presses the portion of the fiber sheet 18 by applying pressure, thereby causing at least a portion of the fiber 18A to be fluffed or broken at a predetermined position closer to the base end portion 9B side than the front end portion 9A in the portion corresponding to the protrusion 9, thereby generating the low-density portion 12. At this time, the portion of the embossing mold corresponding to the vicinity of the front end portion 9A of the protrusion 9 is in contact with the fiber sheet 18 surface, thereby preventing the front end portion 9A from being pierced when the low-density portion 12 is generated, and forming the shielding portion 21. The shielding portion 21 is preferably formed in a portion that includes at least a portion of the front end portion 9A.

Furthermore, the exterior material 1 can be obtained as a fiber sheet 18 (embossed sheet) subjected to embossing processing.

〔1-3 Functions and effects〕

According to the exterior material 1 of the first embodiment, the first protrusion 22 is formed as at least a part of the protrusion G, and at least a part of the first protrusion 22 becomes the protrusion 9 for forming the low-density portion 12. Thereby, when a high-temperature article touches the surface side facing the outer peripheral surface of the container body, even if heat is transferred from the container body to the front end 9A of the protrusion 9 from the portion of the first protrusion 22 that also serves as the protrusion 9, since the low-density portion 12 is formed between the front end 9A and the base end 9B of the protrusion 9, it is difficult for the heat of the front end 9A to be transferred along the fiber sheet 18 via the fiber 18A to reach the base end 9B of the protrusion 9. In addition, as shown in FIG. 5C, the first protrusion 22 can function as a spacer for forming the gap 27 between the container body 502 and the sheet 3. Thus, an air layer is formed through the gap 27, and the air layer can also achieve the effect of suppressing heat conduction.

According to the exterior material 1 of the first embodiment, the shape of the sheet 3 can be stabilized by forming the second protrusion 23. According to the exterior material 1 of the first embodiment, even if a force is applied from the non-opposite surface 3B side that is not opposite to the outer peripheral surface 504 toward the opposite surface 3A side, the sheet 3 is unlikely to be deformed such that the opposite surface 3A side is more protruded by forming the second protrusion 23, and the risk of the peripheral portion 15 of the sheet 3 contacting the outer peripheral surface of the container body can be suppressed. However, the second protrusion 23 protrudes toward the opposite surface 3A side. Therefore, in the formation position of the second protrusion 23, the separation distance between the sheet 3 and the outer peripheral surface of the container body becomes smaller than when the second protrusion 23 is not formed. However, in the first embodiment, the second protrusion 23 is formed by connecting two different first protrusions 22. Therefore, the sheet 3 is unlikely to be deformed unnecessarily, and unintended contact between the peripheral portion 15 and the outer peripheral surface can be suppressed.

According to the exterior material 1 of the first embodiment, a plurality of protrusions 9 are formed, and the front end 9A of the protrusion 9 faces the outer peripheral surface of the container body. A low-density portion 12 is formed on the protrusion 9.

In addition, in the first embodiment, as shown in FIG. 5B and FIG. 5C, the low-density portion 12 is formed closer to the base end portion 9B side than the shielding portion 21, thereby being set to the following state: at least a portion of the low-density portion 12 is not in contact with the container body, and at least a portion of the low-density portion 12 is facing the gap 27. When the air layer of the gap 27 in the exterior material 1 is heated, the air AH can be gradually diffused from the low-density portion 12 to the sheet 3 toward the outside through the low-density portion 12, and the air AH contained in the heated air layer can be gradually released to the outside. It is believed that the temperature rise of the opposite surface 3A side of the surface of the exterior material 1 facing the container body can be suppressed.

〔2-3 Variations〕

Next, a variation of the first embodiment is described in detail.

(Variant 1)

In the first embodiment, the combined structure 24 can be formed by the first protrusion 22 and the second protrusion 23. (This method is referred to as the modification 1 of the second embodiment.) FIG. 3 is a diagram showing an embodiment in which the sheet 3 of the exterior material 1 of the modification 1 of the second embodiment forms the combined structure 24.

(Assembly structure part)

The combined structure 24 represents a part that is formed in a manner that the first protrusion 22 and the second protrusion 23 are the whole to represent an overall design. For example, the layout of the second protrusion 23 is determined in a manner that one or more second protrusions 23 display a character or pattern, thereby forming the combined structure 24. In the example of FIG. 3, the combined structure 24 determines the layout of the second protrusion 23 in a manner that the uppercase Roman letter becomes the character Y. In addition, the combined structure 24 is not limited to one, and a plurality of them can be formed.

(Variant 2)

In the first embodiment, a portion of the low-density portion 12 formed on at least a portion of the first protrusion 22 can be extended to the second protrusion 23 connected to the first protrusion 22. (This method is referred to as variation 2 of the second embodiment). By extending the low-density portion 12 to the second protrusion 23, the area of the low-density portion 12 can be ensured to be larger, and the speed of heat diffusion to the entire exterior material 1 can be slowed down.

(Variant 3)

In the above description of the first embodiment, the convex portion 9 which also serves as at least a part of the first convex portion 22 has a sub-protrusion 9D, but the sub-protrusion 9D can also be omitted in the convex portion 9 (variant 3). The other configurations of variant 3 are the same as those of the first embodiment described above except that the sub-protrusion 9D is omitted in the convex portion 9, so the description is omitted.

In the example of modification 3, the main raised portion 9C is formed to the front end of the convex portion 9, and the main raised portion 9C forms the convex portion 9. The main raised portion 9C may be in a shape in which the front end is open or closed. In addition, the front end portion 9A is formed in a prescribed range including the protruding end of the main raised portion 9C. The portion including the front end portion 9A becomes the shielding portion 21, and a low-density portion 12 is formed around the shielding portion 21 (a prescribed portion along the base end portion 9B side of the main raised portion 9C). In addition, when the convex portion 9 does not form the secondary raised portion 9D, the front end of the main raised portion 9C of the convex portion 9 and the portion near it are prescribed as the front end portion 9A of the convex portion 9.

(Variant 4)

In the first embodiment, as shown in FIG. 9A , the sheet 3 may also be provided with a slit portion 34 in the convex portion 9 (referred to as Modification 4 of the first embodiment). FIG. 9A is a top view of an embodiment for explaining Modification 2. In the example of FIG. 9A , a slit portion 34 is formed on the side closer to the base end portion 9B than the front end portion 9A of the convex portion 9.

(Narrow seam)

In the modification 3 of the first embodiment, the slit portion 34 is formed on the base end portion 9B side of the low-density portion 12 of the convex portion 9 in the example of FIG. 9A , but it may be intersected with the low-density portion 12 as shown in FIG. 9B , or may be formed on the front end portion 9A side of the low-density portion 12, and the slit portion 34 may be formed in a manner that merges with the low-density portion 12. The slit portion 34 may also be located in the formation area of the low-density portion 12.

(Method for forming narrow seam)

When the protrusion 9 is formed by embossing, the fiber sheet 18 is pressed so that a plurality of fibers 18A are broken in the portion of the fiber sheet 18 corresponding to the protrusion 9, and at least a portion of the broken fibers 18A are separated from each other. At this time, a portion of the fiber sheet 18 that is closer to the base end 9B side than the front end 9A in the portion of the fiber 18A that is broken corresponding to the protrusion 9 is broken. The slit portion 34 is formed by the broken portion of the fiber sheet 18. Thus, the slit portion 34 is formed in the protrusion 9. In addition, the low-density portion 12 can be formed in the portion of the fiber sheet 18 where no break occurs.

(Variant 5)

In the exterior material 1 of the modification 4 of the first embodiment, as shown in FIG. 9A, the sheet 3 has a slit 34 formed on the convex portion 9, but it can also be formed with an opening hole 36 instead of the slit 34 as shown in FIG. 9C (referred to as the modification 5 of the first embodiment). The opening hole 36 represents a hole structure with an uncertain long side direction such as a circular shape. FIG. 9C is a top view of an embodiment for illustrating the modification 5. In the example of FIG. 9C, the opening hole 36 is formed on the side closer to the base end portion 9B than the front end portion 9A of the convex portion 9. The formation position of the opening hole 36 is not limited to this, and it can also be formed at the front end portion 9A. By providing a perforated hole at a predetermined position of the convex portion 9 of the fiber sheet 18, the opening hole 36 can be formed as a perforated hole.

(Variant 6)

In the exterior material 1 of the first embodiment, as shown in FIG8A, the sheet 3 may have a slit-shaped structure 35 formed at the front end 9A of the protrusion 9 (referred to as variation 6 of the first embodiment). FIG5A is a top view for explaining an embodiment of variation 6.

(Slit structure)

The slit-shaped structural portion 35 is formed by cutting a portion of the fiber 18A constituting the fiber sheet 18 while applying a pulling force to the fiber sheet 18 in the surface direction of the fiber sheet 18. The slit-shaped structural portion 35 is defined as a portion that is different from the low-density portion 12 at a point where the fiber sheet 18 is almost completely cut, and is different from the slit portion 34 at a point where the fiber residues after cutting are in an overlapping state. The slit structure portion 35 is preferably a portion where the fiber 18A exists to limit the degree of change in the contour shape of the slit structure portion 35 when a pulling force is applied to the fiber sheet 18 along the surface direction of the fiber sheet 18, similarly to the low-density portion 12. As shown in FIG8A, the slit structure portion 35 can be connected to the low-density portion 12 described later. In addition, in FIG8A, the slit structure portion 35 is formed into a straight line by cross-sectioning the front end portion 9A, but the shape of the slit structure portion 35 is not limited to this. In addition, as shown in FIG4B, the slit structure portion 35 can also extend further from the front end portion 9A to the base end portion 9B side.

The exterior material 1 of the second embodiment is described.

[2 Second Implementation Form]

[2-1 Composition]

As shown in A, B and C of FIG. 4, the exterior material 1 of the second embodiment has a sheet 3 having a first convex portion 22 and a second convex portion 23 formed as convex portions G, and similarly to the first embodiment, has a convex portion 9 as at least a portion of the convex portion G protruding toward the opposite surface 3A of the surface of the sheet 3 that is opposite to the outer peripheral surface of the container body, and at least a portion of the convex portion 9 also serves as at least a portion of the first convex portion 22. A low-density portion 12 is formed on the convex portion 9. Furthermore, the exterior material 1 of the third embodiment has an outward convex portion 37 protruding from the sheet 3 in a direction (outward) opposite to the direction toward the inside of the gap 27 between the sheet 3 and the outer peripheral surface of the container body.

The second embodiment has the same configuration as the first embodiment except for the outward protrusion 37, so the description of other configurations is omitted. FIG4A is a top view schematically showing an embodiment of the exterior material 1 of the second embodiment. FIG4B is a cross-sectional view schematically showing the state of the longitudinal section along the D-D line in FIG4A. FIG4C is a cross-sectional view schematically showing the state of the longitudinal section along the E-E line in FIG4A.

(Outward convex part)

In the exterior material 1 of the second embodiment, the outward convex portion 37 has a convex structure protruding from the non-opposing 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-opposing surface 3B side, and a concave surface 137B is formed on the opposing surface 3A side at a position corresponding to the convex surface 137A. The shape of the concave surface 137B is preferably formed into a shape corresponding to the convex surface 137A.

In the example of A in FIG. 4 , the first outward protrusion 38 provided in the formation area of the second protrusion 23 and the second outward protrusion 39 provided outside the formation area of the second protrusion 23 are formed as the outward protrusion 37. In addition, this is an example, and only one of the first outward protrusion 38 and the second outward protrusion 39 may be provided. In addition, the outward protrusion 37 may be formed in a manner that straddles the base end portion 23B of the second protrusion 23 (not shown).

(Height of the first outward convex part)

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 where the non-opposing surface 3B of the first sheet protrudes further outward than the position of the peripheral portion 15, and when the user's hand touches the sheet 3 of the exterior material 1, it can contact the first outward protrusion 38 before contacting the peripheral portion 15, and it can be expected that the contact area between the user's hand and the sheet 3 can be reduced.

(Height of the second outward convex part)

The height of the second outward protrusion 39 is not particularly limited.

From the viewpoint of improving the heat insulation of the exterior material 1, it is preferred that at least one of the first outward protrusion 38 and the second outward protrusion 39 has a low-density portion similar to the low-density portion 12 of the protrusion 9. From this viewpoint, it is preferred that at least one of the first outward protrusion 38 and the second outward protrusion 39 has the same structure as the protrusion 9 except for the protruding direction.

〔2-2 Functions and effects〕

According to the exterior material 1 of the second embodiment, a convex portion 9 is formed on the sheet 3, thereby being able to obtain the same effect as the first embodiment.

In addition, in the second embodiment, since the sheet 3 is provided with an outward protrusion 37, the surface area of the sheet 3 can be expanded, and the speed of heat transfer to the entire sheet 3 can be suppressed.

[3 The third implementation form]

[3-1 Composition]

The structure of the exterior material 1 of the third embodiment is described. As shown in A and B of FIG. 13, the exterior material 1 of the third embodiment is the same as the first embodiment except that a surface sheet 5 is laminated on the non-opposite surface 3B of the surface of the sheet 3 in the first embodiment. A and B of FIG. 13 show an example in which a surface sheet 5 is provided on the exterior material of the first embodiment shown in A to C of FIG. 1, and are respectively corresponding to B and C of FIG. 1, and are cross-sectional views for describing an embodiment of the exterior material 1 of the third embodiment.

(Surface sheet)

The surface sheet 5 is a sheet material that allows visible light to pass through. The surface sheet 5 can be a transparent sheet or a semi-transparent sheet. Preferably, when visually observing from one side of the surface sheet 5 with the thickness direction of the surface sheet 5 as the line of sight, the other side of the surface sheet 5 can be seen through. A sheet material (fiber sheet) formed of the same paper material as the fiber sheet 18 described in the first embodiment can be used. In addition, the surface sheet 5 can also be a non-fiber sheet defined as a sheet material that is not a fiber sheet. As a non-fiber sheet, for example, a resin film can be cited.

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

〔3-2 Functions and effects〕

According to the exterior material 1 of the third embodiment, a convex portion 9 is formed on the sheet 3, thereby being able to obtain the same effect as the first embodiment.

In addition, in the third embodiment, the surface sheet 5 covers the non-opposite surface 3B of the sheet 3, and when the structure of the printed portion expressing the design is formed by using the surface sheet 5, and when the design is formed by the second convex portion 23 of the sheet 3, the design expressed by the printed portion of the surface sheet 5 and the design expressed by the second convex portion 23 can be recognized, thereby improving the design of the exterior material 1.

In addition, in the third embodiment, the surface sheet 5 is laminated on the sheet 3, thereby stabilizing the shape of the base end 9B of the protrusion 9, suppressing the deformation of the shape of the protrusion 9, and making the protrusion 9 more difficult to deform.

〔3-3 Variations〕

In the example of the exterior material 1 of the third embodiment shown above, there is a structure in which a surface sheet 5 is layered on the non-opposite surface 3B side of the exterior material 1 in the first embodiment. The third embodiment is not limited to this, and as shown in A and B of Figure 14, there may also be a structure in which a surface sheet 5 is layered on the non-opposite surface 3B side of the exterior material 1 in the second embodiment. This method is called a modified example of the third embodiment. A and B of Figure 14 show an example in which a surface sheet 5 is provided on the exterior material 1 of the second embodiment shown in A to C of Figure 4, and are figures corresponding to B and C of Figure 4, respectively, and are cross-sectional views of an embodiment of the exterior material 1 used to illustrate the modified example of the third embodiment.

In the modification of the third embodiment, it is preferred that the outward protrusion 37 of the sheet 3 is joined to the surface sheet 5. Regarding the method of joining the outward protrusion 37 to the surface sheet 5, for example, an adhesive is applied near the front end of the outward protrusion 37 and the outward protrusion 37 of the sheet 3 is connected to the surface sheet 5, thereby enabling the surface sheet 5 to be bonded to the sheet 3 via the adhesive. In the exterior material 1 of the modification 2 of the fourth embodiment, as shown in A and B of Figure 14, a gap 40 is formed between the sheet 3 and the surface sheet 5. 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 surface sheet 5 can be reduced, and the heat insulation can be further improved. In addition, according to the modification of the third embodiment, an air layer with a gap 40 is formed, thereby further improving the heat insulation.

[4 Implementation form 4]

The structure of the exterior material 1 of the fourth embodiment is described. As shown in A of FIG. 15 , the exterior material 1 of the fourth embodiment is the same as the first embodiment, the second embodiment, and the third embodiment, except that the front end 9A of the protrusion 9 serving as the first protrusion 22 in the first embodiment, the second embodiment, and the third embodiment is provided with a resin 41, or in the vicinity of the front end 9A. FIG. 15 A is a cross-sectional view for describing an embodiment of the exterior material 1 of the fourth embodiment.

(resin)

The resin 41 is provided at the front end portion 9A of the convex portion 9 serving as the first convex portion 22 or in the vicinity of the front end portion 9A, and is provided at least in a portion around the low-density portion 12. The resin 41 may be provided in the entire surrounding of the low-density portion 12. In addition, 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. The resin 41 preferably permeates into the inside of the fiber sheet 18.

The material of the resin 41 is not particularly limited and can be selected according to the conditions such as the purpose of the exterior material 1. As the resin, a resin that can be used for adhesive purposes can be used, for example, starch paste can be appropriately used.

When the exterior material 1 is in contact with the outer peripheral surface of the container body, the resin 41 is in a hardened state. Therefore, the shape near the front end 9A of the protrusion 9 has strength, and even if a certain degree of strong force is applied from the outside to the container body side on the exterior material 1, the protrusion 9 is difficult to deform, and the structure of the low-density part 12 can be made more stable.

[5 Fifth Implementation Form]

The structure of the exterior material 1 of the fifth embodiment is described. As shown in FIG. 15B, the exterior material 1 of the fifth embodiment is the same as the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment, except that the front end portion 9A of the second protrusion 23 or the vicinity of the front end portion 9A is provided with a re-adhesive resin 42. FIG. 15B is a cross-sectional view for describing an embodiment of the exterior material 1 of the fifth embodiment.

(Re-adhesive resin)

A re-adhesive resin 42 is provided at the front end of the second protrusion 23. The re-adhesive resin 42 imparts re-peelability to the exterior material 1 from the container body. By providing the re-adhesive resin 42 at the front end of the second protrusion 23, the exterior material 1 is strongly pressed against the container body, thereby forming a state in which the exterior material 1 and the container body are fixed. In addition, according to the effect of the restoring force of the sheet 3, the bonding state between the exterior material 1 and the container body is gradually released, thereby the state in which the exterior material 1 and the container body are fixed is temporary.

According to the exterior material 1 of the fifth embodiment, when the exterior material 1 is attached to the container body and carried, the exterior material 1 can be fixed to the container body by the re-adhesive resin 42, thereby making it easy to carry. After the container 500 is carried, the second protrusion 23 of the exterior material 1 is separated from the container body, thereby restoring the state in which the heat insulation of the exterior material 1 is effectively exerted. In addition, the part that temporarily contacts the container body 502 is the second protrusion 23, thereby making it difficult for heat to be quickly transferred to the peripheral portion 15 of the sheet, and also suppressing the risk of the exterior material 1 completely losing its function when carried.

[6 Applicable Examples]

In the above-mentioned first to fifth embodiments, as shown below, the exterior material 1 can constitute a part of the container 500, or can be constituted and used independently of the container 500.

(Application Example 1)

As shown in FIG. 11 , the container 500 has a container body 502 having 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 on the upper end side of the container body 502, and has an edge 503 formed by the upper end edge of the opening 501. In the example of FIG. 11 , the edge 503 is a rolled portion formed by rolling the member forming the container body 502 in the direction. In the container 500, the outer casing 550 having a protrusion 551 is formed in a conical shape that matches the shape of the outer peripheral surface 504 of the container body 502, and the front end of the protrusion on the inner peripheral surface side of the outer casing 550 is bonded to the outer peripheral surface 504. In the container 500 shown in the example of FIG11 , an outer casing 550 fixed to the outer peripheral surface 504 of the container body 502 is provided. FIG11 is a cross-sectional view for explaining an embodiment of the container 500. The above-mentioned outer casing material 1 can be used as the outer casing 550 mounted on the container 500.

(Application Example 2)

In Application Example 2, as shown in FIG12, the outer casing 550 described in Application Example 1 is provided as an independent component separated from the container 500 and used as an independent sleeve 560. In this case, the outer casing 1 is used as the sleeve 560. FIG12 is a three-dimensional diagram for explaining an embodiment of the sleeve 560. In addition, the sleeve 560 and the container 500 may be circulated independently of each other, or may be circulated as a combination of the container 500 and the outer casing 1 without adhering the outer casing 1 as the sleeve 560 to the container.

The above specifically describes the implementation form of the new model, its variants and examples of its manufacturing method, but the new model is not limited to the above-mentioned implementation form, variants and examples of manufacturing methods, and various modifications can be made based on the technical concept of the new model.

In addition, the structures, methods, processes, shapes, materials, and numerical values listed in the above-mentioned embodiments, their variations, and their manufacturing methods can be combined with each other as long as they do not deviate from the main purpose of the present invention.

Unless otherwise specified, the materials listed in the above embodiments can be used alone or in combination of two or more.

In addition, the functions and effects listed in this manual do not limit the content of this new model.

This new model can adopt the following structure.

(E1) An exterior material, which is mounted on the outer peripheral surface of a container having a container body, the exterior material being formed of a blank material having a paper material, the exterior material having a plurality of protrusions protruding toward a side opposite to the outer peripheral surface and having a base end and a front end, the exterior material having a plurality of first protrusions and second protrusions connected to at least two different first protrusions as at least a part of the protrusions, the first protrusions protruding further toward the side opposite to the outer peripheral surface than the second protrusions, at least a part of the protrusions having a low-density portion, the density of fibers constituting the paper material in the low-density portion being lower than the density in the base end.

(E2) The exterior material according to (E1) above, wherein a combined structural portion is formed by a combination of the first convex portion and the second convex portion.

(E3) According to the exterior material described in (E1) or (E2) above, at least a portion of the low-density portion formed on at least a portion of the convex portion extends from the first convex portion to the second convex portion.

(E4) According to the exterior material described in any one of (E1) to (E3) above, at least a portion of the low-density portion formed on at least a portion of the convex portion is formed on the first convex portion or the second convex portion.

(E5) According to the exterior material described in any one of (E1) to (E4) above, at least a portion of the convex portion is formed with a shielding portion at a position closer to the front end portion than the low-density portion, the shielding portion extends in a direction transverse to the thickness direction of the blank material and shields at least a portion of the outer peripheral surface, and the density of the fiber in the low-density portion is lower than the density of the fiber in the shielding portion.

(E6) According to the exterior material described in any one of (E1) to (E5) above, the low-density portion has a portion where the density of the fibers constituting the paper material decreases from the front end portion toward the base end portion.

(E7) According to the exterior material described in any one of (E1) to (E6) above, the low-density portion has a portion where the density of the fibers constituting the paper material decreases from the base end portion toward the front end portion.

(E8) According to the exterior material described in any one of (E1) to (E7) above, in the low-density portion, a portion where the density of the fibers constituting the paper material decreases from the front end portion toward the base end portion and a portion where the density of the fibers constituting the paper material decreases from the base end portion toward the front end portion are connected.

(E9) According to the exterior material described in any one of (E1) to (E8) above, the convex portion has a concave surface formed on the non-opposing side that is not opposite to the outer peripheral surface.

(E10) The exterior material according to any one of (E1) to (E9) above, wherein a slit is formed on the convex portion.

(E11) The exterior material according to any one of (E1) to (E10) above, wherein a surface sheet is laminated on the non-opposite side that is not opposite to the outer peripheral surface.

(E12) According to any one of the above (E1) to (E11), the exterior material, at least a portion of the protrusions has a resin.

(E13) According to any one of the above (E1) to (E12), at least a portion of the second protrusion has a re-adhesive resin.

(E14) The exterior material according to any one of (E1) to (E13) above, which is used as a sleeve mounted on the outer peripheral surface.

(E15) A container, wherein the exterior material described in any one of (E1) to (E14) is installed on the outer peripheral surface of the container body.

(E16) A combination of a container and an exterior material, comprising: a container having the container body; and an exterior material as described in any one of (E1) to (E14) above.

1:Exterior materials

3: Sheet

3A: Opposite sides

3B: Non-opposite sides

9: convex part

15: Peripheral area

18: Fiber sheets

22: The first convex part

22A: Front end

22B: Base end

23: Second convex part

23A: Front end

92A: convex

92B: Concave

93A: convex

93B: Concave

G: convex part

H1: Height

H2: Height

PI: Pitch

X1: Area

Claims (16)

An exterior material is used to be mounted on the outer peripheral surface of a container having a container body, The exterior material is formed of a blank material having a paper material, The exterior material has a plurality of protrusions protruding toward the opposite surface side opposite to the outer peripheral surface and having a base end and a front end, The exterior material has a plurality of first protrusions as at least a part of the protrusions, and a second protrusion connected to at least two different first protrusions, The first protrusion protrudes further toward the opposite surface side opposite to the outer peripheral surface than the second protrusion, At least a part of the protrusions has a low-density portion, and the density of the fiber constituting the paper material in the low-density portion is lower than the density in the base end. The exterior material as described in claim 1, wherein a combined structural portion formed by a combination of the first convex portion and the second convex portion is formed. The exterior material as described in claim 1, wherein, at least a portion of the low-density portion formed in at least a portion of the convex portion extends from the first convex portion to the second convex portion. The exterior material as described in claim 1, wherein, at least a portion of the low-density portion formed on at least a portion of the convex portion is formed on the first convex portion or the second convex portion. The exterior material as described in claim 1, wherein, at least a portion of the convex portion is formed with a shielding portion at a position closer to the front end portion than the low-density portion, the shielding portion extends in a direction transverse to the thickness direction of the blank material and shields at least a portion of the outer peripheral surface, the density of the fiber in the low-density portion is less than the density of the fiber in the shielding portion. The exterior material as described in claim 1, wherein the low-density portion has a portion where the density of the fibers constituting the paper material decreases from the front end portion toward the base end portion. The exterior material as described in claim 1, wherein the low-density portion has a portion where the density of the fibers constituting the paper material decreases from the base end portion toward the front end portion. An exterior material as described in claim 1, wherein, in the low-density portion, a portion where the density of the fibers constituting the paper material decreases from the front end portion toward the base end portion and a portion where the density of the fibers constituting the paper material decreases from the base end portion toward the front end portion are connected. The exterior material as described in claim 1, wherein the convex portion has a concave surface formed on a non-opposing surface side that is not opposite to the outer peripheral surface. The exterior material as described in claim 1, wherein a slit is formed in the convex portion. The exterior material as described in claim 1, wherein a surface sheet is layered on a non-opposing surface side that is not opposite to the outer peripheral surface. An exterior material as described in claim 1, wherein at least a portion of the protrusion has a resin. The exterior material as described in claim 1, wherein, at least a portion of the second protrusion has a re-adhesive resin. The exterior material as described in claim 1 is used as a sleeve installed on the outer peripheral surface. A container, wherein the exterior material as described in any one of claims 1 to 14 is installed on the outer peripheral surface of the container body. A combination of a container and an exterior material, comprising: A container having the container body; and An exterior material as described in any one of claims 1 to 14.