Shrink packaging material and shrink package

Abstract

To provide a stretchable packaging material and a stretchable packaging body that make it easy to take out a content when the packed content is reduced.SOLUTION: When a strip-shaped cut part formed on a trunk part 10 of a stretchable cup 1 is cut off, a flexible sheet 14 inside the strip-shaped cut part appears. The trunk body 10 is separated into an upper trunk part 10a and a lower trunk part 10b with the flexible sheet 14 interposed therebetween. When the upper trunk part 10a is pushed down toward the lower trunk part 10b, the flexible sheet 14 is deformed and the height of the stretchable cup 1 becomes short. A content remaining on a bottom can be easily taken out. A delaminated part 19 remains on a lower edge of the upper trunk part 10a and an upper edge of the lower trunk part 10b.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This invention relates to a stretch wrapping material and a stretch package using the same.

Background Art

[0002] Various devices have been made to make it easier to take out the contents packaged in a packing box or a package. Patent Document 1 discloses a packing box of a type that breaks off the upper part of the front wall. Patent Document 2 describes a package that breaks off the peripheral wall part sandwiched by upper and lower break lines and removes the part above the upper break line to expose the upper part of the ice cream.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

[0004] When the packaged contents are taken out little by little or eaten, the contents gradually decrease and it becomes difficult to take them out of the packing box or the package. Since the one described in Patent Document 1 breaks off the upper part of the front wall from the beginning, it is not easy to take out when the contents decrease. Since Patent Document 2 also removes the part above the upper break line from the beginning, it is not easy to take out when the contents decrease either.

Disclosure of the Invention

[0005] An object of this invention is to make it easy to take out the contents when the packaged contents decrease.

[0006] Another object of this invention is to reduce the volume of the packing box or the package, making it easier to carry and easier to discard.

[0007] The present invention further aims to achieve a heat insulation effect.

[0008] Also, the present invention aims to reduce the step and fraying of the cut-out portion.

[0009] The stretchable packaging material according to the present invention includes a base material sheet and a flexible sheet. On the surface of the base material sheet, a pair of surface-side half-cuts extending in the direction connecting both side ends of the base material sheet are formed at intervals in the vertical direction. Within the range sandwiched by the pair of surface-side half-cuts on the back surface of the base material sheet, a pair of back-surface-side half-cuts extending in the direction connecting both side ends of the base material sheet are formed at intervals in the vertical direction with a narrower interval than the pair of surface-side half-cuts. The flexible sheet is fixed to the back surface of the base material sheet above and below the range sandwiched by the pair of back-surface-side half-cuts, respectively. The stretchable packaging material, as will be described in detail below, does not stretch and contract the packaging material (flexible sheet constituting the packaging material) itself, but has regions with high stiffness (waist strength) and low stiffness, and the overall dimensions can be stretched and contracted by deforming (flexing) the region with low stiffness. Such a packaging material is referred to.

[0010] A pair of surface-side half-cuts are formed on the surface of the base material sheet, and a pair of back-surface-side half-cuts are formed on the back surface at intervals in the vertical direction, respectively. The interval between the pair of surface-side half-cuts is wider than the interval between the pair of back-surface-side half-cuts, and the pair of back-surface-side half-cuts on the back surface of the base material sheet are located within the range sandwiched by the pair of surface-side half-cuts on the surface.

[0011] Above and below the range sandwiched by the pair of back-surface-side half-cuts, the flexible sheet is fixed to the back surface of the base material sheet. The flexible sheet has a size that covers the range of the base material sheet sandwiched by the pair of surface-side half-cuts. However, the flexible sheet may have a size that covers the entire back surface of the base material sheet.

[0012] Since both the pair of front - side half - cuts and the pair of back - side half - cuts extend in the direction connecting both side ends of the base material sheet, when the portion sandwiched by the pair of front - side half - cuts and the pair of back - side half - cuts is cut out from the base material sheet, the base material sheet separates into an upper portion and a lower portion, and a flexible sheet remains (appears, is exposed) between them. Also, delamination of the base material sheet occurs between the upper front - side half - cut and the upper back - side half - cut, and between the lower front - side half - cut and the lower back - side half - cut. That is, when a part of the base material sheet is cut out as described above, a delamination part having a thickness of about half of the thickness of the base material sheet remains, for example, between the upper front - side half - cut and the upper back - side half - cut, and a delamination part also remains between the lower front - side half - cut and the lower back - side half - cut. The step and fraying of the cut - out part are reduced, and the risk of hand injury can be mitigated.

[0013] By bringing the two base material sheets separated vertically (the overlapping part of the base material sheet and the flexible sheet fixed to its back surface) closer (pushing one towards the other), the part of the exposed flexible sheet sandwiched between the two base material sheets separated vertically can be deformed (crushed, flattened, overlapped with flexible sheets), and the distance between the end faces of the two base material sheets can be reduced. Preferably, in order to deform only the flexible sheet when the upper and lower base material sheets are brought closer, a flexible sheet having a stiffness smaller than the stiffness (rigidity) of the overlapping part of the base material sheet and the flexible sheet is used. The flexible sheet can be deformed without deforming the overlapping part of the base material sheet and the flexible sheet, or while keeping the degree of deformation small, and the distance between their end faces can be reduced while maintaining the shape of the overlapping part of the base material sheet and the flexible sheet, for example. Of course, by separating the two base material sheets and the overlapping part of the flexible sheet separated vertically from each other, the once - reduced distance can also be extended (restored).

[0014] There only needs to be a difference in the stiffness (rigidity) between the overlapping portion of the base sheet and the flexible sheet and the flexible sheet. However, if the difference in stiffness (or stiffness ratio) is too small, it becomes difficult to maintain the shape of the overlapping portion of the base sheet and the flexible sheet (although the flexible sheet naturally deforms, the overlapping portion of the base sheet and the flexible sheet also deforms simultaneously). Therefore, it is preferable that there is a difference in stiffness (stiffness ratio) between the overlapping portion of the base sheet and the flexible sheet and the flexible sheet such that the shape of the overlapping portion of the base sheet and the flexible sheet can be maintained to a certain extent (retained), in other words, such that only the flexible sheet can be deformed.

[0015] The desired difference in stiffness can be produced by making the materials or configurations (materials, layer configurations, etc.) of the base sheet and the flexible sheet different. In addition to or instead of this, a desired difference in stiffness may be produced by making the thicknesses of the base sheet and the flexible sheet different. That is, the base sheet and the flexible sheet may be made of the same material. A desired difference in stiffness can be produced by making the thicknesses different. Considering the use as a packaging material for packaging objects and forming the above-described delamination portion between layers, examples of the material of the base sheet include paper (paper having a paper thickness such that a delamination portion can be left), laminates of paper and polystyrene, paper and polyethylene terephthalate, paper and polypropylene, paper and nylon, etc. Examples of the material of the flexible sheet include resins such as polystyrene, polyethylene, polyethylene terephthalate, polypropylene, nylon, etc., metals such as aluminum foil, and laminates thereof.

[0016] In one embodiment, the pair of front-side half-cuts and the pair of back-side half-cuts are parallel to each other. The two base sheets divided vertically can be brought closer to each other without causing an inclination. Needless to say, the pair of front-side half-cuts and the pair of back-side half-cuts do not necessarily have to be parallel.

[0017] The above-mentioned stretch wrapping material can be used for the body or wall of a package (such as a packaging container, a packaging bag, a packing box, etc.). When the contents contained in the package decrease, by bringing the end faces of the two base sheets divided vertically closer to each other to reduce the height (back), it is possible to make it easier to take out the contents.

[0018] The above-mentioned body or wall may be such that the diameter gradually increases from the lower part to the upper part. When the package is shrunk, since the body or wall of the lower part of the flexible sheet can be housed inside the body or wall of the upper part of the flexible sheet, the volume reduction of the package can be achieved. Also, since the body or wall of the upper part of the flexible sheet and the body or wall of the lower part of the flexible sheet are double-layered in the inner and outer directions, a heat insulation effect can also be obtained.

Brief Description of the Drawings

[0019]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Example 1

[0020] Figures 1 to 7 show the telescopic cup of the first embodiment. Figure 1 is a perspective view of the telescopic cup, Figure 2 is a partially cut-away front view of the telescopic container along line II-II of Figure 1, Figure 3 is an exploded view (blank view) showing the body part constituting the telescopic cup from the outside, and Figure 4 is an enlarged cross-sectional view along line IV-IV of Figure 3. The illustration of the lid material covering the opening of the telescopic cup is omitted in Figures 1 and 2. Figure 5 is a perspective view of the telescopic cup with the strip-shaped cut-out part of the body part to be described later cut out, Figure 6 is a perspective view of the telescopic cup in a contracted state, and Figure 7 is a cross-sectional view along line VII-VII of Figure 6.

[0021] The telescopic cup 1 is composed of a body part 10 and a bottom part 20. The body part 10 is cylindrical with a larger diameter at the top and a smaller diameter towards the bottom. The upper edge peripheral end part of the open body part 10 is wound outward so as to be rounded to form a curl part 11. The upper edge peripheral end part of the body part 10 may be simply folded to form a flange part that slightly spreads outward. The opening of the body part 10 is closed by adhering a lid material (not shown) to the annular upper surface formed by the curl part 11. The bottom part 20 is circular, and its peripheral end part is bent downward (bending part 21). The bottom part 20 fits exactly into the lower end opening of the body part 10, and the lower end part of the body part 10 is folded back inward (folding-back part 12), and this folding-back part 12 sandwiches the bending part 21 of the bottom part 20. The inner and outer surfaces of the bending part 21 of the bottom part 20 and the inner surface of the folding-back part 12 of the lower end part of the body part 10 sandwiching this are adhered or welded.

[0022] Referring to FIG. 3, the body portion 10 constituting the telescopic cup 1 is made from an arcuate blank. The side portions of the blank are adhered to each other by an adhesive portion N provided on one side portion of the arcuate blank to form a cylindrical shape, and the cylindrical body portion 10 is formed by folding back the upper edge peripheral end portion and the lower end portion as described above.

[0023] Referring to FIGS. 3 and 4, the body portion 10 has a laminated structure in which a base material sheet (outer layer material) 13 and a flexible sheet (inner layer material) (flexible film) 14 are laminated. The base material sheet 13 is located on the front surface side of the body portion 10, and the flexible sheet 14 is located on the back surface side.

[0024] The base material sheet 13 is, for example, a flat paper material, and for example, one with a basis weight of 260 g / m 2 can be used. For the flexible sheet 14, a laminate composed of a resin film or a metal film is used. As an example, a laminate in which polyethylene (PE) with a thickness of 40 μm / polyethylene terephthalate (PET) with a thickness of 12 μm / adhesive / aluminum (AL) with a thickness of 7 μm / ethylene-methacrylic acid copolymer (EMAA) with a thickness of 15 μm is laminated from the inside to the outside is used. The materials of the base material sheet 13 and the flexible sheet 14 are appropriately selected according to the functions required for the telescopic cup 1 (light-shielding property, oil resistance, water resistance, etc.), and their thicknesses are also appropriately adjusted according to the contents, etc. The thickness of the flexible sheet 14 is thin (several tens of μm in total as described above) and has flexibility. On the other hand, the base material sheet 13 is composed of a paper material with thickness, has a higher stiffness (waist strength) than the flexible sheet 14, and generally has no flexibility (of course, flexibility can also be provided). As an example, a paper material with a thickness of 280 μm and a loop stiffness value of 3760 mN·m / 15 mm is adopted for the base material sheet 13. A laminate with a thickness of 74 μm and a loop stiffness value of 13 mN·m / 15 mm is adopted for the flexible sheet 14. In this case, the stiffness difference between the overlapping portion of the base material sheet 13 and the flexible sheet 14 and the flexible sheet 14 is 3686 mN·m / 15 mm.

[0025] The loop stiffness values of the base material sheet 13 and the flexible sheet 14 represent the waist strength of the thin material, and can be measured, for example, using a loop stiffness tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.). The unit of the measured value is mN / 15 mm. The loop stiffness value refers to the crushing resistance of the loop-shaped member. The loop length is set, a loop is formed using a chuck so as to have that length, the distance between the pressure head and the chuck is set, and it means the resistance value when the loop-shaped member is pushed into the above set distance by the pressure head. A large numerical value of this thin material means that it has a waist. The loop stiffness values of the base material sheet 13 and the flexible sheet 14 described above were measured by preparing a test piece with a width of 15 mm and a length of 165 mm, setting the loop length to 120 mm, and setting the pressure head-chuck distance to 20 mm. Specifically, both ends of the test piece with the above dimensions are grasped by chucks at an interval of 120 mm, and a loop-shaped test piece with a loop length of 120 mm is formed by bringing the chucks closer to each other (the chuck is located at the root of the loop-shaped test piece). The loop-shaped test piece is pushed toward the chuck using a pressure head until the pressure head-chuck distance becomes 20 mm, and the loop-shaped test piece is crushed. The value (resistance value) measured at this time is the loop stiffness value. The "stiffness" described in this specification may be read as "loop stiffness value" or "waist strength".

[0026] Referring to FIG. 2, the bottom 20 can also be composed of a base material sheet 22 and a flexible sheet 23. The base material sheet 22 and the flexible sheet 23 constituting the bottom 20 may be made of the same material as the base material sheet 13 and the flexible sheet 14 constituting the body portion 10, respectively, or different materials may be used.

[0027] Referring to FIG. 3, on the surface (outer surface) side of the base sheet 13 constituting the body portion 10, two half-cut lines (hereinafter referred to as "surface-side half-cuts") 16A and 16B that extend in an arc shape and are parallel in the direction connecting both side edges of the base sheet 13 are formed at intervals vertically. On the back surface (inner surface) side, within the range sandwiched by the surface-side half-cuts 16A and 16B, two half-cut lines (hereinafter referred to as "back-surface-side half-cuts") 17A and 17B that extend in an arc shape and are parallel in the direction connecting both side edges of the base sheet 13 and are narrower in width than the above surface-side half-cuts 16A and 16B are formed vertically. The surface-side half-cuts 16A and 16B and the back-surface-side half-cuts 17A and 17B may be formed continuously, or a large number of short half-cuts may be formed intermittently. Hereinafter, the portion sandwiched by the surface-side half-cuts 16A and 16B and the back-surface-side half-cuts 17A and 17B and cut off from the body portion 10 as described later is referred to as the "strip-shaped cut-off portion 18".

[0028] As described later, the strip-shaped cut-off portion 18 is cut off from the base sheet 13 along the surface-side half-cuts 16A and 16B and the back-surface-side half-cuts 17A and 17B. In order to make the tip of the strip-shaped cut-off portion 18 easier to pick up when cutting off the strip-shaped cut-off portion 18, as shown in FIG. 3, for one end of the strip-shaped cut-off portion 18, instead of the surface-side half-cuts 16A and 16B and the back-surface-side half-cuts 17A and 17B, a pair of through-cuts 15 may be formed. However, the through-cuts 15 are not essential, and the surface-side half-cuts 16A and 16B and the back-surface-side half-cuts 17A and 17B can be formed throughout.

[0029] Referring to FIG. 4, the adhesion range between the base material sheet 13 and the flexible sheet 14 is indicated by reference numeral N. As shown in FIG. 4, the base material sheet 13 and the flexible sheet 14 that constitute the body portion 10 are adhered to each other (adhesion region) in the upper region of the upper back-side half cut 17A and the lower region of the lower back-side half cut 17B, and in the range of the strip-shaped cutout portion 18 sandwiched therebetween, the base material sheet 13 and the flexible sheet 14 are not adhered (non-adhesion region) or are only temporarily adhered. Therefore, even if the strip-shaped cutout portion 18 is cut out from the base material sheet 13 (body portion 10), the flexible sheet 14 remains as it is and is not cut together with the strip-shaped cutout portion 18. For example, an adhesive is once applied to the entire inner surface of the base material sheet 13, and then a release varnish (release agent) is further applied by overlapping it with the adhesive in the non-adhesion region, and the flexible sheet 14 is adhered to the inner surface of the base material sheet 13 to adhere only the adhesion region (to prevent the non-adhesion region from being adhered). When a heat-sealing agent is used as the adhesive, heat may be applied only to the adhesion region. Of course, the adhesive may be applied only to the adhesion region and not to the non-adhesion region.

[0030] Referring to FIG. 1, in the cylindrical body portion 10, the strip-shaped cutout portion 18 goes around the body portion 10. Referring to FIG. 5, when the strip-shaped cutout portion 18 is cut out over one week, the flexible sheet 14 located inside the cut-out strip-shaped cutout portion 18 appears. Also, since the width between the front-side half cuts 16A and 16B is wide and the width between the back-side half cuts 17A and 17B is narrower than that, delamination occurs between the layers of the paper between the front-side half cut 16A and the back-side half cut 17A, and between the front-side half cut 16B and the back-side half cut 17B. For example, a delamination portion 19 having a thickness of about half the paper thickness of the base material sheet 13 (body portion 10) remains at locations corresponding to the upper and lower edges of the strip-shaped cutout portion 18. By leaving the delamination portion 19, the step and fuzziness of the cut portion are reduced, and the risk of injuring the hand can be reduced.

[0031] When the strip-shaped cutout portion 18 is cut off, the body portion 10 (the overlapping portion of the base sheet 13 and the flexible sheet 14) is divided into two upper and lower parts with the exposed flexible sheet 14 sandwiched therebetween. Hereinafter, the upper part of the body portion 10 divided into two is referred to as the upper body portion 10a, and the lower part is referred to as the lower body portion 10b. Since the surface-side half cuts 16A and 16B and the back-side half cuts 17A and 17B are formed in the base sheet 13 constituting the body portion 10 and not formed in the flexible sheet 14, even if the strip-shaped cutout portion 18 is cut off, the area is still covered by the flexible sheet 14, and the barrier property of the stretchable cup 1 can be continuously ensured.

[0032] The strip-shaped cutout portion 18 is typically cut off at the timing when the contents wrapped by the stretchable cup 1, for example, the stick-shaped confectionery K1, have been eaten to a certain extent. Referring to FIGS. 6 and 7, after cutting off the strip-shaped cutout portion 18, when the upper body portion 10a is pushed toward the lower body portion 10b, the upper and lower body portions 10a and 10b with relatively high stiffness hardly deform, and only the flexible sheet 14 with low stiffness deforms. The upper end portion of the lower body portion 10b enters inside the upper body portion 10a, and the upper body portion 10a and the lower body portion 10b partially overlap. The flexible sheet 14 between the upper body portion 10a and the lower body portion 10b is sandwiched and hidden between the inner surface of the upper body portion 10a and the outer surface of the lower body portion 10b. The height of the stretchable cup 1 decreases, and the distance between the bottom of the stretchable cup 1 and the opening of the stretchable cup 1 approaches, so that the stick-shaped confectionery K1 remaining at the bottom is easier to take out. In addition, by reducing the height, the stretchable cup 1 becomes compact, easy to carry, and it is also possible to reduce the volume of garbage when the stick-shaped confectionery K1 is eaten up and the stretchable cup 1 is discarded.

[0033] In addition, the stretchable cup 1 in the state where the height is reduced has a double structure at its upper end portion by the upper body portion 10a and the lower body portion 10b. By grasping the double-structured portion (the upper body portion 10a) by hand, it is not necessary to feel the heat on the hand when pouring hot water or the like into the stretchable cup 1. The stretchable cup 1 thus provides heat insulation as well.

[0034] FIG. 8 shows a modified example of the body portion, and shows a developed view corresponding to FIG. 3.

[0035] The body portion 10A of the modified example shown in FIG. 8 is different from the above-described body portion 10 (see FIGS. 3 and 4) in that the flexible sheet 14A is partially provided in a strip-shaped range including the strip-shaped cutout portion 18, and the flexible sheet 14 is provided on the entire inner surface of the base material sheet 13. The strip-shaped flexible sheet 14A is adhered to the back surface side of the base material sheet 13 above the back surface side half cut 17A and below the back surface side half cut 17B formed in the base material sheet 13, respectively. Also for the body portion 10A of the modified example, when the strip-shaped cutout portion 18 is cut out, the flexible sheet 14A having flexibility located inside the strip-shaped cutout portion 18 is sandwiched between the upper and lower two body portions 10A.

Example 2

[0036] FIGS. 9 to 11 show a second embodiment. FIG. 9 shows a front view of the expandable and contractible packaging bag 2 provided with a sector-shaped body portion 30 for packaging a sector-shaped confectionery (for example, a crepe K2). FIG. 10 shows a developed view of the sector-shaped body portion 30. FIG. 11 shows the expandable and contractible packaging bag 2 in a contracted state.

[0037] Referring to FIG. 10, similar to the body portion 10 provided in the expandable and contractible cup 1 of the first embodiment, the sector-shaped body portion 30 of the expandable and contractible packaging bag 2 has a laminated structure of a base material sheet 33 and a flexible sheet 34. The flexible sheet 34 is thin and flexible. The stiffness of the overlapping portion of the base material sheet 33 and the flexible sheet 34 is greater than the stiffness of the flexible sheet 34. The base material sheet 33 is made of, for example, paper with a basis weight of 100 g / m 2 and the flexible sheet 34 is made of, for example, polyethylene furanoate (PEF) having a thickness of 20 μm. By adhering the adhesive portion N on one side of the sector-shaped body portion 30 in the fan-shaped unfolded state to the other side, a sector-shaped space is created, and a fan-shaped confectionery (crepe K2) is placed in the space (FIG. 9).

[0038] On the surface (outer surface) side of the base material sheet 33, two surface-side half cuts 36A and 36B are formed in an arc shape and extend parallel to each other in the direction connecting the both side edges of the base material sheet 33 with a space therebetween. On the inner surface (back surface) side, two back surface-side half cuts 37A and 37B are formed in an arc shape and extend parallel to each other in the direction connecting the both side edges of the base material sheet 33, and the width of the back surface-side half cuts 37A and 37B is narrower than that of the surface-side half cuts 36A and 36B, and the back surface-side half cuts 37A and 37B are formed in a range sandwiched by the two surface-side half cuts 36A and 36B. The flexible sheet 34 is adhered to the inner surface of the base material sheet 33 above and below the back surface-side half cuts 37A and 37B, and the flexible sheet 34 in the range located inside the strip-shaped cutout portion 38 is not adhered to the base material sheet 33. When the strip-shaped cutout portion 38 is cut out, the flexible sheet 34 located inside the strip-shaped cutout portion 38 appears, and an interlayer peeling portion 39 (see FIG. 11) having a thickness about half of the paper thickness of the base material sheet 33 (body portion 30) remains at locations corresponding to the upper edge portion and the lower edge portion of the strip-shaped cutout portion 38.

[0039] Referring to FIG. 11, when the strip-shaped cutout portion 38 is cut out and the upper body portion 30a is pushed down toward the lower body portion 30b, or the lower body portion 30b is pushed up toward the upper body portion 30a, the upper end portion of the lower body portion 30b enters inside the upper body portion 30a, and the upper body portion 10a and the lower body portion 10b partially overlap. The height of the packaging bag 2 becomes lower, and the upper end portion of the half-eaten crepe K2 can be exposed to the outside. Since there is a flexible sheet 34 inside the strip-shaped cutout portion 38 to be cut out, the cream or the like of the crepe K2 does not adhere to the strip-shaped cutout portion 38, and the hand is not soiled when cutting out the strip-shaped cutout portion 38.

Example 3

[0040] FIGS. 12 to 15 show a third embodiment. FIG. 12 shows a perspective view of the expandable and contractible packaging box, and FIG. 13 shows a developed view of the expandable and contractible packaging box shown in FIG. 12. FIGS. 14 and 15 each show a perspective view of the expandable and contractible packaging box in a state where the strip-shaped cutout portion is cut out and the height is lowered.

[0041] Referring to FIG. 13, FIG. 13 shows a pattern (development drawing) forming the expandable and collapsible packaging box 3 shown in FIG. 12, and is a view of the outer surface when assembled into the packaging box 3. The dashed-dotted line indicates the fold line when assembling the expandable and collapsible packaging box 3. In order to facilitate folding, scoring, half-cutting, perforation formation, etc. are appropriately performed along the dashed-dotted line.

[0042] The right side panel 41, the front panel 42, the left side panel 43, the back panel 44 and the adhesive margin panel 62 are arranged horizontally in series. An outer top panel 51 is connected in series to the upper edge of the front panel 42, and an inner top panel 52 is connected in series to the upper edge of the back panel 44. An outer bottom panel 53 is connected in series to the lower edge of the front panel 42, and an inner bottom panel 54 is connected in series to the lower edge of the back panel 44. Flaps 61 are respectively connected in series to the upper and lower edges of the left and right side panels 41, 43.

[0043] An extraction hole 51a is formed in the outer top panel 51, and the contents of the packaging box 3, for example, tissues, are taken out through this extraction hole 51a.

[0044] The packaging box 3 is assembled as follows. That is, the pattern is folded at the boundary between the left side panel 43 and the back panel 44, and the boundary between the front panel 42 and the right side panel 41 is also folded. The overlapping adhesive margin panel 62 and the right side panel 41 are adhered to form a cylinder, and then the box is erected so that the angle between adjacent panels becomes a right angle. A square tube with open upper and lower surfaces is formed.

[0045] The flaps 61 connected in series to the upper edges of the left and right side panels 41, 43 are folded inward at a right angle. The inner top panel 52 at the upper edge of the back panel 44 is folded inward at a right angle. The outer top panel 51 at the upper edge of the front panel 42 is folded inward at a right angle, and the inner surface of the outer top panel 51 and the outer surface of the inner top panel 52 are adhered. The top surface (upper surface) of the square tube is closed.

[0046] Contents such as tissues are placed into the square tube from the open bottom surface (lower surface), and then the bottom opening is closed. The flaps 61 at the lower edges of the left and right side panels 41 and 43 are folded inward at right angles. Next, the inner bottom panel 54 connected to the lower edge of the rear panel 44 and the outer bottom panel 53 connected to the lower edge of the front panel 42 are each folded inward at right angles, and the inner surface of the outer bottom panel 53 and the outer surface of the inner bottom panel 54 are adhered together. The bottom surface of the square tube is closed, and the packaging box 3 (Fig. 12) is completed.

[0047] Referring to Figs. 12 and 13, on the front surface side of the wall portion (front panel 42, rear panel 44, left and right side panels 41, 43, glue margin panel 62) of the packaging box 3, three surface side half cuts 81A, 81B, and 81C extending horizontally in parallel are formed at intervals in the vertical direction. The range sandwiched between the upper surface side half cut 81A and the middle surface side half cut 81B is called the upper strip-shaped cutout portion 91. The range sandwiched between the middle surface side half cut 81B and the lower surface side half cut 81C is called the lower strip-shaped cutout portion 92. On the back surface side of the wall portion of the packaging box 3, narrow back surface side half cuts 82A and 82B are formed between the upper surface side half cut 81A and the middle surface side half cut 81B, and narrow back surface side half cuts 83A and 83B are formed between the middle surface side half cut 81B and the lower surface side half cut 81C.

[0048] A strip-shaped flexible sheet 71 is provided on the inner surfaces of the upper and lower strip-shaped cutout portions 91 and 92. The strip-shaped flexible sheet 71 is adhered to the inner surface of the wall portion of the packaging box 3 above the upper back surface side half cut 82A and below the lower back surface side half cut 83B formed on the wall portion of the packaging box 3.

[0049] Referring to Fig. 12, the packaging box 3 in the initial state is filled with a lot of contents (tissues). As tissues are taken out from the extraction hole 51a of the outer top panel 51, the tissues in the packaging box 3 gradually decrease.

[0050] When the tissue in the packaging box 3 decreases to a certain level, the upper strip-shaped cutting part 91 is cut off, and the outer top panel 51 is pushed downward. As shown in Fig. 14, the height of the packaging box 3 decreases. The distance between the remaining tissue in the packaging box 3 and the extraction hole 51a becomes closer, making it easier to extract the tissue.

[0051] After more tissue is taken out from the extraction hole 51a and the amount of tissue decreases, the lower strip-shaped cutting part 92 is also cut off, and the outer top panel 51 is pushed downward again. As shown in Fig. 15, since the height of the packaging box 3 becomes even lower, it is possible to easily take out the remaining small amount of tissue from the extraction hole 51a.

Explanation of Signs

[0052] 1 Telescopic cup 2 Telescopic packaging bag 3 Telescopic packaging box 10, 10A Barrel part 16A, 16B, 36A, 36B, 81A, 81B, 81C Surface-side half cut 17A, 17B, 37A, 37B, 82A, 82B, 83A, 83B Back-side half cut 18, 38, 91, 92 Strip-shaped cutting part 13, 33 Base material sheet 14, 14A, 34, 71 Flexible sheet 19, 39 Interlayer peeling part 41 Right side panel 42 Front panel 43 Left side panel 44 Back panel N Adhesive part

Claims

Claim 1 A base sheet and a flexible sheet having a size to cover the entire back surface of the base sheet, the flexible sheet being laminated to the entire back surface of the base sheet via an adhesive, On the surface of the base sheet, a pair of surface-side half cuts extending in a direction connecting both side ends of the base sheet are formed at intervals in the vertical direction, Within the range sandwiched by the pair of surface-side half cuts on the back surface of the base sheet, a pair of back-surface-side half cuts extending in a direction connecting both side ends of the base sheet are formed vertically with a narrower interval than the pair of surface-side half cuts, A release agent is applied by overlapping it with the adhesive in the range sandwiched by the pair of back-surface-side half cuts on the entire back surface of the base sheet, and the adhesion between the base sheet and the flexible sheet in the range sandwiched by the pair of back-surface-side half cuts is weaker than the adhesion between the base sheet and the flexible sheet above and below the range sandwiched by the pair of back-surface-side half cuts, A stretch wrapping material. Claim 2 The stiffness of the flexible sheet is smaller than the stiffness of the overlapping portion of the base sheet and the flexible sheet, The stretch wrapping material according to Claim 1. Claim 3 The pair of surface-side half cuts are parallel, The stretch wrapping material according to Claim 1 or 2. Claim 4 The pair of back-surface-side half cuts are parallel, The stretch wrapping material according to any one of Claims 1 to 3. Claim 5 A stretch wrapping body comprising a body portion or a wall portion composed of the stretch wrapping material according to any one of Claims 1 to 4, A stretch wrapping body. Claim 6 The diameter of the body portion or the wall portion gradually increases from the lower part to the upper part, The stretch wrapping body according to Claim 5.

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