sanitary bags

Abstract

It can be stored upright in a cylindrical shape when in use, sealed tightly after use, and stored flat and stacked before use. [Solution] The device comprises a front sheet A and a back sheet B, a bottom sheet C positioned between the lower parts of the front and back sheets, and a resin chuck member 4. The front and back sheets are joined in three layers: an inner-side fused resin film LL, an intermediate aluminum vapor-deposited film AP, and a surface-side kraft paper K. The bottom sheet is joined in three layers, sandwiching an aluminum foil AF between two roughly rectangular fused resin films and resin films, forming a fold 5 in the center and folding it in half with the fused resin film on the outside. The lower and bottom edges of the left and right side edges of the front and back sheets are fused to the left and right side edges and bottom edges of the fused resin film of the folded bottom sheet, and the upper parts of the left and right side edges are fused to each other.

Description

Technical Field

[0001] The present invention relates to a sanitary bag for temporarily storing used sanitary products, hygiene products, etc.

Background Art

[0002] As a sanitary bag capable of storing and temporarily storing used disposable diapers, there is a portable disposable diaper package disclosed in Patent Document 1.

[0003] This portable disposable diaper package is a portable disposable diaper package in which a plurality of disposable diapers in a small number are accommodated in a non-breathable sheet-made packaging bag. The plurality of disposable diapers are accommodated in the packaging bag in a state of being integrally packaged with a single packaging material made of a transparent film. The packaging bag is a bag having a bottom area that maintains a self-standing posture in a upright position. A zipper is provided at a position lower by a predetermined length than the upper end of the packaging bag at the opening of the packaging bag, and the upper and lower upper sheet portions of the packaging bag above the zipper are opened in a non-adhesive state, and a transparent portion through which the inside can be seen is provided in a part of the range closer to the upper part of the packaging bag (Claim 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the packaging body of the prior art is a bag having a bottom area that maintains a self-standing posture in a upright position, it can be in a self-standing posture when putting in used disposable diapers. However, since it is made of a non-breathable sheet, its hardness is low, the bottom is always spread over a wide area, and folding is not considered.

[0006] Conventional packaging is sufficient for storing disposable diapers before use, but if the bag is only for used hygiene products and does not contain unused ones, it is required that it be foldable into a thin bag that can be stacked and stored in large quantities. In such a case, the low rigidity of the front and back sheets and the permanently unfolded shape of the bottom sheet are difficult to apply.

[0007] The present invention aims to provide a sanitary bag that can solve the problems of the conventional technology described above.

[0008] The present invention aims to provide a sanitary bag that can maintain a robust self-standing posture during use and can be folded into a thin shape for storage, by using kraft paper for the outer layers of the front and back sheets and forming a fold in the bottom sheet. [Means for solving the problem]

[0009] The specific means for solving the problem in the present invention comprises a front sheet A and a back sheet B of substantially the same shape, a bottom sheet C disposed between the lower parts of the front sheet A and the back sheet B, and a resin chuck member 4 disposed between the upper parts of the front sheet A and the back sheet B. The front sheet A and back sheet B are bonded together in three layers: an inner-side fusion-bondable resin film LL, an intermediate aluminum vapor-deposited film AP, and a surface-side kraft paper K. The bottom sheet C is formed by joining two fused resin films LL and P of roughly the same shape in three layers with aluminum foil AF in between, and is folded in half with a fold 5 formed in the center of a roughly rectangular shape, with the fused resin film LL on the outside. The front sheet A and back sheet B are fused to the left and right side edges and bottom edge of the fused resin film LL of the folded bottom sheet C at the lower and bottom edges of both sides, and the upper parts of the left and right side edges are fused to each other. [Effects of the Invention]

[0010] According to the present invention, when in use, the bottom sheet C spreads out, allowing the top sheet A and back sheet B to stand upright in a cylindrical shape. When the resin zipper member 4 is tightened, it can be stored without water leakage or odor leakage. When not in use, the bottom sheet C can be folded in half along the fold line 5 and stored in a thin, flat stack. [Brief explanation of the drawing]

[0011] [Figure 1] This is a front view showing a sanitary bag 1A according to the first embodiment of the present invention. [Figure 2] This is a cross-sectional view of sanitary bag 1A. [Figure 3] This is a bottom view of the self-supporting sanitary bag 1A. [Figure 4] This is a front view showing a sanitary bag 1B according to a second embodiment of the present invention. [Figure 5] This is a cross-sectional view of sanitary bag 1B. [Figure 6] This is an enlarged cross-sectional view of sanitary bag 1B. [Figure 7] This is an exploded view of sanitary bag 1B. [Figure 8] This is a front view showing a sanitary bag 1C according to a third embodiment of the present invention. [Figure 9] This is a cross-sectional view of sanitary bag 1C. [Figure 10] This is an enlarged cross-sectional view of sanitary bag 1C. [Modes for carrying out the invention]

[0012] Hereinafter, embodiments of the present invention will be described based on the drawings.

[0013] Figures 1-3 show the sanitary bag 1A of the first embodiment.

[0014] The sanitary bag 1A has a front sheet A and a back sheet B of substantially the same shape, a bottom sheet C positioned between the lower parts of the front sheet A and the back sheet B, and a resin zipper member 4 positioned between the upper parts of the front sheet A and the back sheet B.

[0015] The front sheet A and the back sheet B are made into a three-layer structure by sandwiching an adhesive between a heat-fusible resin film LL on the inner surface side, an aluminum vapor-deposited film AP in the middle, and a kraft paper K on the surface side, and are joined by dry lamination La to form a sheet having airtightness and barrier properties.

[0016] In addition, instead of dry lamination La, it is also possible to perform extrusion lamination bonding by sandwiching a resin between the layers.

[0017] As the heat-fusible resin film LL, a resin film capable of heat-fusing films such as a linear low-density polyethylene film can be used. As the aluminum vapor-deposited film AP, an aluminum vapor-deposited polyethylene terephthalate can be used. As the kraft paper K, unbleached kraft can be used.

[0018] Since the front sheet A and the back sheet B are three-layered, their hardness is higher than when formed in one or two layers. However, by stacking the kraft paper K, which has a higher hardness than the heat-fusible resin film LL and the aluminum vapor-deposited film AP, on these two layers, the hardness becomes even higher.

[0019] The bottom sheet C is made into a three-layer structure by sandwiching an aluminum foil AF between a substantially rectangular heat-fusible resin film LL and a resin film TP, and is joined by dry lamination La with an adhesive sandwiched between the layers to form a sheet having airtightness and barrier properties.

[0020] Then, a fold 5 is formed at the center of the substantially rectangular bottom sheet C, and it is folded in half with the heat-fusible resin film LL on the outside. It is preferable to bond the resin films TP facing each other when folded in half at the left and right side edge portions.

[0021] For the fused resin film LL of the bottom sheet C, linear low-density polyethylene film or the like that can be heat-sealed to the fused resin film LL on the inner surface of the front sheet A and back sheet B can be used. For the aluminum foil AF, a thickness of 5 to 10 μm can be used, and for the resin film TP, polyethylene terephthalate (PET) with a thickness of 10 to 20 μm can be used.

[0022] The resin chuck member 4 is a male-to-female connectable zipper or fastener, formed from the fusion-sealable resin film LL and a heat-sealable resin, with one male (male a) being bonded to the inner surface of the front sheet A and the other male (female b) being bonded to the inner surface of the back sheet B. Alternatively, the resin chuck member 4 may be formed from polyethylene terephthalate, with a linear low-density polyethylene film bonded to the surfaces facing the front sheet A and back sheet B.

[0023] The aforementioned sanitary bag 1A is formed by placing a bottom sheet C, folded in half along a fold 5, between the lower parts of the front sheet A and the back sheet B, fusing the lower and lower edges of the left and right side edges of the fused resin film LL on the inner surfaces of the front sheet A and the back sheet B to the left and right side edges and lower edge of the fused resin film LL of the folded bottom sheet C, and then fusing the left and right side edges of the front sheet A and the back sheet B to form a bottomed bag shape.

[0024] The bottom sheet C, which is doubled by being folded in half along the aforementioned fold 5, has its left and right side edges fused to the lower parts of the left and right side edges of the front sheet A and back sheet B along its entire vertical length. However, the fusion width T of the lower edge narrows as it moves from the left and right side edges towards the center, forming a non-fused area G above the fusion width T.

[0025] The non-fused area G is an area that expands when the front sheet A and the back sheet B are opened and an item is placed between them, causing the central part of the bottom sheet C to unfold.

[0026] The resin chuck member 4 may be fused at the same time as the upper parts of the left and right edges of the front sheet A and the back sheet B, or the male member a and female member b may be fused separately to the front sheet A and the back sheet B before the front sheet A and the back sheet B are brought into contact.

[0027] Hook holes 9 are formed on the upper parts of the front sheet A and back sheet B, above the resin chuck member 4. These hook holes 9 are formed after the front sheet A and back sheet B are joined together, but they may also be formed individually on the front sheet A and back sheet B.

[0028] When unused, the aforementioned sanitary bag 1A has a bottom sheet C folded in half along the fold line 5, and is a thin bag throughout, allowing multiple bags to be stored flat on top of each other.

[0029] When using the aforementioned sanitary bag 1A, the tops of the front sheet A and back sheet B are pulled apart to open the opening, the male and female parts a and b of the resin zipper member 4 are also pulled apart, and the bottom sheet C is unfolded from its folded state while the front sheet A and back sheet B are spread out into a cylindrical shape (shown by dashed lines in Figures 1 and 2, and the state shown in the bottom view in Figure 3).

[0030] When the bottom sheet C is unfolded, the fold 5, which was initially horizontal, becomes an arc shape that protrudes downward from both ends on the left and right sides of the front sheet A and back sheet B towards the center, forming a downward-convex hemispherical bottom for the cylindrical bag. This downward-convex hemispherical bottom is a shape that can resist external forces and prevents the cylindrical shape of the front sheet A and back sheet B from becoming flattened.

[0031] When the outer sheet A and inner sheet B of the sanitary bag 1A are formed into a cylindrical shape and the bottom sheet C is deformed into a downward-convex hemispherical bottom cylinder, it can be placed upright on the floor or other surface with the bottom sheet C facing downwards, i.e., it can stand upright on its own. When the sanitary bag 1A is in its upright position, used sanitary products, hygiene products, etc. are placed inside through the top opening and the resin zipper member 4 is closed, the inside of the bag is sealed, and a storage condition is achieved that prevents water leakage and odor leakage.

[0032] Figures 4-7 show the sanitary bag 1B of the second embodiment.

[0033] Sanitary bag 1B, like sanitary bag 1A, has a front sheet A and a back sheet B of substantially the same shape, a bottom sheet C positioned between the lower parts of front sheet A and back sheet B, and a resin zipper member 4 positioned between the upper parts of front sheet A and back sheet B. In addition, the upper edges of front sheet A and back sheet B are fused together with their respective fused resin films LL, and a triangular notch 6 for cutting the upper edge is formed below the fused area. A horizontally elongated hook hole 9 is also formed.

[0034] The front sheet A and back sheet B of the sanitary bag 1B are joined together with a dry laminate La, using three layers: an inner-side fusion-compatible resin film LL, an intermediate aluminum-metallized film AP, and an outer-side kraft paper K, with adhesive sandwiched between the layers.

[0035] The bottom sheet C is made of three layers, with an aluminum foil AF sandwiched between two roughly rectangular fusion-compatible resin films LL and TP, and is joined with dry laminate La with adhesive in between. A fold 5 is formed in the center of the roughly rectangular shape, and it is folded in half with the fusion-compatible resin film LL on the outside.

[0036] The front sheet A and back sheet B are fused to the left and right side edges and bottom edge of the fused resin film LL of the folded bottom sheet C at the lower and bottom edges of both sides, and the upper part of the fused resin film LL above the lower part of both sides is fused to each other, and the top edge is also fused to each other to form an upper edge seal 8, so that the entire perimeter is fused and it becomes a sealed bag.

[0037] Since the entire circumference of the sanitary bag 1B is fused and sealed, a notch 6 for cutting the upper edge is formed below the fused point of the upper edge and above the resin zipper member 4. By cutting and removing the upper edge from this notch 6, the opening of the bag is created, allowing the bag to be opened.

[0038] When placing used sanitary products, hygiene products, etc., into the sanitary bag 1B, the presence of the slit 6 This confirms that the product is unused. Then, the top edge is cut and removed from the cut 6, and while opening the bag from the mouth, the resin zipper member 4 is released, and the bottom sheet C is unfolded from its folded state while the front sheet A and back sheet B are spread out into a cylindrical shape. As a result, the bottom sheet C expands and the front sheet A and back sheet B become cylindrical, allowing the bag to stand upright on the floor.

[0039] After placing used sanitary products, hygiene products, etc., into the sanitary bag 1B, close the resin zipper component 4 to store it in a way that prevents water and odor leakage.

[0040] When unused, the aforementioned sanitary bag 1B has a bottom sheet C folded in half along the fold line 5, and is a thin bag throughout, allowing multiple bags to be stored flat on top of each other.

[0041] Figures 8-10 show the sanitary bag 1C of the third embodiment.

[0042] Sanitary bag 1C, like sanitary bag 1B, has a front sheet A and a back sheet B of substantially the same shape, a bottom sheet C positioned between the lower parts of the front sheet A and back sheet B, and a resin zipper member 4 positioned between the lower parts of the front sheet A and back sheet B. The upper edges of the front sheet A and back sheet B are fused together with their respective fused resin films LL, and a triangular notch 6 for cutting the upper edge is formed below the fused area, and a horizontally elongated hook hole 9 is formed.

[0043] The outer sheet A and inner sheet B of the sanitary bag 1C are made of three layers: an inner fusion-compatible resin film LL, an intermediate transparent vapor-deposited film SP, and an outer kraft paper K. These layers are joined together with adhesive in between using dry lamination La, resulting in a sheet that is not breathable.

[0044] Furthermore, at least one of the front sheet A and back sheet B of the sanitary bag 1C (only the front sheet A in Figure 8) has a window 7 formed by cutting out a portion of the kraft paper K on the surface side, allowing a view inside the bag.

[0045] The bottom sheet C is made of three layers: a roughly rectangular fusion-compatible resin film LL and a resin film TP sandwiching a transparent vapor-deposited film SP. Adhesive is placed between the layers and the layers are joined with dry laminate La to create a sheet that is non-permeable and transparent. A fold 5 is then formed in the center of the roughly rectangular sheet, and it is folded in half with the fusion-compatible resin film LL on the outside.

[0046] As the transparent vapor-deposited film SP, silica vapor-deposited polyethylene terephthalate, aluminum oxide vapor-deposited polyethylene terephthalate, and the like can be used.

[0047] The front sheet A and back sheet B of the aforementioned sanitary bag 1C are fused to the left and right side edges and bottom edge of the fused resin film LL of the folded bottom sheet C, similar to sanitary bag 1B. The parts above the bottom of the left and right side edges are fused to each other, and the top edge is also fused to each other to form an upper edge seal 8, so that the entire perimeter is fused and the bag is sealed.

[0048] The front sheet A and back sheet B of the sanitary bag 1C are sealed by fusing their respective fusionable resin films LL together at the top, so a notch 6 for cutting the top edge is formed on the lower side of the top edge seal 8.

[0049] Similar to sanitary bag 1B, when used sanitary products, hygiene products, etc. are placed inside this sanitary bag 1C, the bottom sheet C expands, and the front sheet A and back sheet B become cylindrical, allowing it to stand upright. When the resin zipper member 4 is closed, it can be stored without leakage of water or odor.

[0050] Furthermore, when the sanitary bag 1C is stored, the contents of the waste on the bottom sheet C can be visually inspected through the window 7 from the outside of the front sheet A (or back sheet B).

[0051] When unused, the aforementioned sanitary bag 1C has a bottom sheet C folded in half along the fold line 5, and is a thin bag throughout, allowing multiple bags to be stored flat on top of each other.

[0052] It should be noted that the present invention is not limited to the embodiments described above, and the shape, configuration, and combination of the members can also be changed.

[0053] For example, the vapor deposition width of the upper edge seal 8 of sanitary bags 1B and 1C may be made narrower than the vapor deposition width of the left and right side edges.

[0054] In sanitary bags 1B and 1C, the notch 6 may be formed as a perforation instead of a triangular cutout. [Explanation of symbols]

[0055] 1A, 1B, 1C Sanitary bag 4. Resin chuck component 5 folds 6 cuts 7 windows 8. Upper edge seal 9 hook holes A Front sheet AF aluminum foil AP Aluminum-Metal-Deposited Film B Back sheet C Bottom sheet G Non-fused area K Kraft paper LL fusion-compatible resin film La Dry Laminate P resin film SP Transparent Metallized Film T fusion width TP resin film a male wood b Female wood

Claims

1. It comprises a front sheet (A) and a back sheet (B) of substantially the same shape, a bottom sheet (C) positioned between the lower parts of the front sheet (A) and the back sheet (B), and a resin chuck member (4) positioned between the upper parts of the front sheet (A) and the back sheet (B). The front sheet (A) and back sheet (B) are bonded together in three layers: an inner-side fusion-bondable resin film (LL), an intermediate aluminum-metallized film (AP), and a surface-side kraft paper (K). The bottom sheet (C) is formed by joining three layers of a roughly rectangular fusion-able resin film (LL) and a resin film (TP) with an aluminum foil (AF) sandwiched in between, and by forming a fold (5) in the center of the roughly rectangular shape and folding it in half with the fusion-able resin film (LL) on the outside. The sanitary bag is characterized in that the front sheet (A) and back sheet (B) are fused to the left and right side edges and bottom edges of the fused resin film (LL) of the folded bottom sheet (C) at the lower and bottom edges of both side edges, and the upper parts of the fused resin films (LL) are fused to each other above the lower parts of both side edges.

2. It comprises a roughly rectangular front sheet (A) and back sheet (B), a bottom sheet (C) positioned between the lower parts of the front sheet (A) and back sheet (B), and a resin chuck member (4) positioned between the lower parts of the front sheet (A) and back sheet (B). The front sheet (A) and back sheet (B) are bonded in three layers: an inner-side fusion-bondable resin film (LL), an intermediate aluminum-metallized film (AP), and a surface-side kraft paper (K). The bottom sheet (C) is formed by joining three layers of a roughly rectangular fusion-able resin film (LL) and a resin film (TP) with an aluminum foil (AF) sandwiched in between, and by forming a fold (5) in the center of the roughly rectangular shape and folding it in half with the fusion-able resin film (LL) on the outside. The front sheet (A) and back sheet (B) are fused to the left and right side edges and bottom edge of the fused resin film (LL) of the folded bottom sheet (C) at the lower and bottom edges of both side edges, and the fused resin films (LL) above the lower part of both side edges are fused to each other. The sanitary bag is characterized in that the upper edges of the front sheet (A) and back sheet (B) are fused together with their respective fused resin films (LL), and a notch (6) for cutting the upper edge is formed below the fused area.

3. It comprises a front sheet (A) and a back sheet (B) of substantially the same shape, a bottom sheet (C) positioned between the lower parts of the front sheet (A) and the back sheet (B), and a resin chuck member (4) positioned between the lower parts of the front sheet (A) and the back sheet (B). The front sheet (A) and back sheet (B) are bonded in three layers: an inner-side fusion-bondable resin film (LL), an intermediate transparent vapor-deposited film (SP), and a surface-side kraft paper (K). The bottom sheet (C) is formed by joining a transparent vapor-deposited film (SP) between a roughly rectangular fused resin film (LL) and a resin film (TP) in a three-layer structure, and by forming a fold (5) in the center of the roughly rectangular shape and folding it in half with the fused resin film (LL) on the outside. The front sheet (A) and back sheet (B) are fused to the left and right side edges and bottom edges of the fused resin film (LL) of the folded bottom sheet (C) at the lower and bottom edges of both sides, and the upper part of the left and right side edges is fused to each other to form an upper edge seal (8). The front sheet (A) and the back sheet (B) are fused together at their upper ends using their respective fusion-compatible resin films (LL), and a notch (6) for cutting the upper edge is formed on the lower side of the fusion point. A sanitary bag characterized in that at least one of the front sheet (A) and the back sheet (B) has a window (7) formed by cutting out a portion of the kraft paper (K) on the front side to allow visibility into the bag.

4. The bottom sheet (C), which is doubled by being folded in half along the aforementioned fold (5), has both left and right side edges fused to the lower part of both left and right side edges of the front sheet (A) and back sheet (B) along its entire vertical length, and the fusion width (T) of the bottom edge narrows as it moves from the left and right side edges towards the center. A sanitary bag according to any one of claims 1 to 3, characterized in that when an item is placed between the front sheet (A) and the back sheet (B) and the bottom sheet (C) is spread out, a non-fused area (G) is formed between the front sheet (A) and the back sheet (B) so that the central part of the bottom sheet (C) unfolds.

5. The sanitary bag according to any one of claims 1 to 3, characterized in that a hook hole (9) is formed above the resin zipper member (4) on the upper part of the front sheet (A) and the back sheet (B).

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