Stopper and packaging bag with stopper using same

Abstract

To propose a plug which enables easy disassembly and cleaning after use in a packaging bag with a plug for storing a beverage or the like and is suitable for recycling, and to propose a packaging bag with a plug which uses the plug.SOLUTION: A plug 1 is used in a packaging bag 10 with a plug and has: a fusion part 3 where a cylindrical spout cylinder 2 for pouring a content and a packaging bag body 11 are fused. The fusion part of the plug is formed by two components and may be divided into two parts along a fitting surface 5.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a stopper for use in a spouted packaging bag, and to a spouted packaging bag using the same, and in particular to a stopper that is easy to disassemble and clean after use and is suitable for recycling, and to a spouted packaging bag using the same. [Background technology]

[0002] Packaging bags with spouts are known, which allow the contents to be sucked out by placing the spout directly in the mouth. The contents can be juice drinks, energy drinks, jelly drinks, etc., but it is not possible to drink the entire contents, and a small amount of the contents inevitably remains inside the packaging bag. Recycling requires cleaning the inside of the packaging bag, but because this process is tedious, they are often discarded as combustible waste rather than recycled.

[0003] The spout described in Patent Document 1 is a spout that is attached to a packaging bag that does not have a spout. This spout is easy to attach to and remove from a packaging bag, and is also reusable. While this spout is ideal in terms of recyclability, unfortunately it could not be applied to the above-mentioned beverages, etc. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 11-124151 Summary of the Invention [Problem to be solved by the invention]

[0005] The problem to be solved by the present invention is to provide a spouted packaging bag for storing beverages and the like, which is easy to disassemble and clean after use and suitable for recycling, and a spouted packaging bag using the same. [Means for solving the problem]

[0006] As a means for solving the above problem, the invention described in claim 1 is a spout used for a spouted packaging bag, which has a cylindrical pouring tube for pouring out the contents and a welding part for welding the packaging bag body, and the welding part is made up of two parts that fit together at their fitting surfaces, and is characterized by a structure that can be separated into two along the fitting surfaces.

[0007] The spout for a spouted packaging bag according to the present invention has a structure that can be separated into two parts, and therefore can be easily disassembled and washed when discarded after use.

[0008] The invention described in claim 2 is the plug described in claim 1, characterized in that the dividing line, which is the line at which the fitting surface is exposed on the surface of the welded part, is located inside the part where the packaging bag body is welded.

[0009] The invention as set forth in claim 3 is the plug as set forth in claim 1 or 2, characterized in that the two parts are fitted together by means of a convex portion and a concave portion provided on the fitting surfaces.

[0010] The invention as set forth in claim 4 is the plug as set forth in any one of claims 1 to 3, characterized in that the two parts are fitted together by an undercut shape.

[0011] In addition, the invention described in claim 5 is characterized in that the material constituting the stopper does not contain pigment. The plug according to any one of claims 1 to 4 is characterized in that:

[0012] The invention described in claim 6 is a packaging bag equipped with a spout described in any one of claims 1 to 5, characterized in that the spout attachment portion of the packaging bag has a tear initiation portion for tearing the packaging bag near the dividing line.

[0013] The invention described in claim 7 is the spout-equipped packaging bag according to claim 6, characterized in that the laminate constituting the packaging bag body is easy to tear in the vertical direction. [Effects of the Invention]

[0014] The plug of the present invention has a welded portion made up of two parts and is designed to be separable into two along the dividing surface, making it easy to disassemble and clean when discarding it after use.

[0015] If the dividing line of the welded portion of the spout is located inside the portion where the packaging bag body is welded, as in the invention described in claim 2, the risk of liquid leakage from the dividing line can be further reduced.

[0016] As in the invention described in claim 3, when the two parts that make up the welded portion of the plug are fitted together by a convex and concave portion provided on the fitting surfaces, there is an effect of preventing unintentional separation. Furthermore, when the two parts that make up the welded portion of the plug are fitted together by an undercut shape, as in the invention described in claim 4, this effect of preventing separation is further enhanced.

[0017] As in the invention described in claim 5, if the material constituting the stopper does not contain pigment, there is an advantage that the degradation of quality caused by pigment being mixed into the recycled material after recycling is avoided.

[0018] As in the invention described in claim 6, if the spout-equipped packaging bag has a tear-starting portion for tearing the packaging bag near the dividing line at the spout attachment portion, it becomes even easier to disassemble the spout after use.

[0019] Furthermore, as in the invention described in claim 7, if the laminate constituting the packaging bag body is easy to tear vertically, the operation of tearing the packaging bag body vertically into two as the stopper is disassembled becomes more reliable and easier. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is a perspective view showing one embodiment of a spout-equipped packaging bag according to the present invention. [Figure 2]FIG. 2 is an explanatory perspective view showing the state in which the spout-equipped packaging bag shown in FIG. 1 has been used, the spout has been split along the split surface, and the packaging bag body has been torn into two pieces. [Figure 3] FIG. 3 is a schematic front view showing one embodiment of the plug according to the present invention. [Figure 4] Fig. 4 is an explanatory diagram showing the plug according to the present invention in a state where the welded portion is disassembled into two parts from the state shown in Fig. 3. Fig. 4(1) shows the dispensing tube and welded portion B, and Fig. 4(2) shows the welded portion A. [Figure 5] FIG. 5 is a schematic side view of the plug according to the present invention shown in FIG. [Figure 6] Figure 6 is an explanatory diagram showing the state in which the welded portion of the stopper has been disassembled into two parts from the state shown in Figure 5. Figure 6(1) shows the dispensing tube and welded portion B, and Figure 6(2) shows the welded portion A. [Figure 7] FIG. 7 is a schematic front view of a conventional plug. [Figure 8] FIG. 8 is a schematic side view of the plug shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0021] The spout and spout-equipped packaging bag according to the present invention will be described in detail below with reference to the drawings. Fig. 3 is a schematic front view showing one embodiment of the spout 1 according to the present invention. Fig. 4 is an explanatory view showing the spout 1 according to the present invention in the state shown in Fig. 3, with the welded portion 3 disassembled into two parts. Fig. 5 is a schematic side view of the spout 1 according to the present invention shown in Fig. 3. Fig. 6 is an explanatory view showing the spout 1 in the state shown in Fig. 5, with the welded portion 3 disassembled into two parts.

[0022] As shown in the figure, the stopper 1 of the present invention is a stopper to be used in a stoppered packaging bag 10, and has a cylindrical pouring tube 2 for pouring out the contents and a welding part 3 for welding the packaging bag body 11, and the welding part 3 of the stopper is composed of two parts, namely, welding part A (A) and welding part B (B), and is characterized by a structure that can be separated into two along the fitting surface 5.

[0023] 3 to 6, the dividing line 4 is located inside the welding portion 3 that welds the packaging bag body, so there is no need to worry about the contents leaking out from the dividing line. In this example, the welding portion A (A) and the welding portion B (B), which are two parts that make up the welding portion 3, are fitted together by a convex portion 7 and a concave portion 6 provided on the fitting surface 5.

[0024] As shown in Figure 4(1), recesses 6 and protrusions 7 are provided on the mating surface 5 so as to be fitted alternately. The arrangement of the recesses and protrusions may be such that, for example, a recess is provided on one of the welded portions A and B and a protrusion is provided on the other.

[0025] In the examples shown in Figures 3 to 6, no undercut shape is provided in either the recess 6 or the protrusion 7, but by providing an undercut so that the tip of the protrusion is slightly wider than the base and the base of the recess is slightly wider than the opening, the fit between the welded part A and the welded part B can be made even stronger.

[0026] 7 and 8 are schematic front and side views, respectively, of a conventional stopper. Unlike the stopper of the present invention, the conventional stopper has a structure that cannot be disassembled, making it difficult to wash and therefore recycle a used spouted packaging bag.

[0027] In contrast, as shown in Figures 1 and 2, the spout-equipped packaging bag 10 according to the present invention has the welded portion 3 of the spout 1 made up of two parts (welded portion A and welded portion B), and can be easily disassembled after use. This makes it easy to clean after use and makes it easy to recycle.

[0028] In the example shown in Figures 1 and 2, tear initiation portions 16 for tearing the packaging bag body 11 are provided in two locations near the dividing line 4 at the spout attachment portion of the spout-equipped packaging bag 10, and further in this example, the laminate constituting the packaging bag body 11 is made to be easy to tear in the vertical direction (17), making it even easier to disassemble.

[0029] The front laminate 12, the back laminate 13, and the side tape 14 that constitute the packaging bag body 11 are The simplest layer structure is a combination of a heat-resistant substrate layer and a heat-sealable sealant layer, but an intermediate layer may be added as needed, or a gas barrier layer, a printed layer, or the like may be combined.

[0030] The substrate layer can be made of various synthetic resin films or papers, including polyolefin resins such as low-density polyethylene resin (LDPE), high-density polyethylene resin (HDPE), linear low-density polyethylene resin (LLDPE), polypropylene resin (PP), and polyolefin elastomers; polyester resins such as polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), and polyethylene naphthalate resin (PEN); cellulose resins such as cellophane and cellulose triacetate (TAC) resin; polymethyl methacrylate resin (PMMA), ethylene-vinyl acetate copolymer resin (EVA), ionomer resin, polybutene resin, polyacrylonitrile resin, polyamide resins such as nylon-6 and nylon-66, polystyrene resin (PS), polyvinyl chloride resin (PVC), polyvinylidene chloride resin (PVDC), polycarbonate resin (PC), fluorine-based resins, and urethane-based resins.

[0031] Polyolefin resins are generally used for the sealant layer, and specific examples include ethylene resins such as low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer, and ethylene-methacrylic acid resin copolymer, as well as blends of polyethylene and polybutene, and polypropylene resins such as homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, and propylene-α-olefin copolymer.

[0032] The intermediate layer can be any of the synthetic resin films or papers listed for the base layer. The layers can be bonded together by dry lamination using an adhesive, extrusion lamination using extruded resin, or solventless lamination using a hot melt adhesive.

[0033] The sealant layer of the laminate is used by welding to the welding portion 2 of the plug 1, so the material of the plug 1 needs to be a material that can be welded to the sealant layer. Since polyolefin resins are generally used for the sealant layer, polyolefin resins are often used for the plug 1 as well.

[0034] Although the plug 1 can be colored by adding a pigment in addition to the resin, it is preferable to avoid adding a pigment if possible, taking into consideration recyclability. [Explanation of symbols]

[0035] 1···Seal 2...Pour tube 3...Welded area A...Welded part A B...Welded part B 4. Dividing line 5. Mating surface 6. Recess 7. Convex part 8···Cap 10. Packaging bag with spout 11...Packaging bag body 12...Front area laminate 13 Back laminate 14 Side tape 15 Seal part 16. Starting point of slit 17. Easy tearing direction

Claims

1. A spout used for a spouted packaging bag, the spout having a cylindrical pouring tube for pouring out the contents and a welding part for welding the packaging bag body, the welding part being composed of two parts that fit together at their fitting surfaces, and having a structure that can be separated into two along the fitting surfaces, A flow path forming groove is formed in each of the two components, When the two components are fitted together, the flow path forming grooves face each other to form a pouring flow path for pouring the content, The stopper is characterized in that the surface of the welded portion opposite the pouring tube side is formed by the surface of one of the two parts opposite the pouring tube side and the surface of the other part opposite the pouring tube side.

2. 2. The plug according to claim 1, wherein the dividing line, which is the line where the fitting surface is exposed on the surface of the welded portion, is present inside the portion where the packaging bag body is welded.

3. 3. The plug according to claim 1, wherein the two parts are fitted together by means of a convex portion and a concave portion provided on the fitting surfaces.

4. 4. The plug according to claim 1, wherein the two parts are fitted together by an undercut shape.

5. 5. The plug according to claim 1, wherein the material constituting the plug does not contain a pigment.

6. A stopper as described in any one of claims 1 to 5, characterized in that of the two parts, the surface of one part opposite the dispensing tube side and the surface of the other part opposite the dispensing tube side are flush when the two parts are fitted together.

7. A stopper as described in any one of claims 1 to 6, characterized in that the surface of the welded portion opposite the dispensing tube side is a surface that can be divided into two by the two parts.

8. 3. A packaging bag with a spout according to claim 2, wherein a tear initiation portion for tearing the packaging bag is provided near the dividing line at the spout attachment portion of the packaging bag.

9. A spout used for a spouted packaging bag, comprising a cylindrical pouring tube for pouring out the contents and a welding part for welding the packaging bag body, the welding part being composed of two parts that fit together at their fitting surfaces and having a structure that can be divided into two along the fitting surfaces, The division line, which is the line where the fitting surface is exposed on the surface of the welded part, is a packaging bag equipped with a spout that is located inside the part where the packaging bag body is welded, and the spout attachment part of the packaging bag has a tear start part for tearing the packaging bag near the division line.

10. 10. The spout-equipped packaging bag according to claim 8 or 9, wherein the laminate constituting the packaging bag body is easily torn in the longitudinal direction.

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