Packaging bag with spout

Abstract

To propose a plug which enables easy disassembly and cleaning after use in a packaging bag with a plug for storing various liquids 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. In the fusion part, a slit-like non-fusion part 4 where the packaging bag body is not fused exists. Further, in the packaging bag 10 with the plug 1, a slit serving as a cut starting part 16 is provided at a portion of the packaging bag body which corresponds with the slit-like non-fusion part 4 of the fusion part of the plug.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention ,mouth Regarding packaging bags with stoppers, they are particularly easy to disassemble and wash after use, and are suitable for recycling. Taguchi This relates to packaging bags with stoppers. [Background technology]

[0002] Packaging bags for storing liquid detergent refills and the like are known. The contents include hand-washing detergent, shampoo, dishwashing detergent, etc., but it is impossible to use up all of the 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 troublesome, the bags are often discarded as combustible waste rather than recycled.

[0003] The spout stopper described in Patent Document 1 is a stopper that is attached to a packaging bag that does not have a spout. This stopper is easy to attach to and remove from a packaging bag, and is also reusable. While this stopper is ideal in terms of recyclability, unfortunately it could not be applied to the above-mentioned contents. [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 various liquids, 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-mentioned problems, 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 welded part for welding the packaging bag body, and is characterized in that the welded part has a slit-shaped non-welded part that does not weld the packaging bag body.

[0007] The spout for a spout-equipped packaging bag according to the present invention has a slit-like portion that is not welded to the packaging bag body, and the packaging bag body can be easily torn from this portion, so that it 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 material constituting the plug does not contain any pigment.

[0009] The invention described in claim 3 is the plug described in claim 1 or 2, characterized in that the portion of the welding part that welds the packaging bag body is made up of a plurality of parallel lines.

[0010] The invention described in claim 4 is a packaging bag equipped with a spout described in any one of claims 1 to 3, characterized in that a slit that serves as a tearing start point is provided in the packaging bag body that coincides with the slit-shaped non-welded portion of the welded portion of the spout.

[0011] The invention described in claim 5 is the spout-equipped packaging bag according to claim 4, characterized in that the laminate constituting the packaging bag body is easy to tear in the vertical direction.

[0012] The invention described in claim 6 is the spout-equipped packaging bag described in claim 4 or 5, characterized in that the seal portion on the outer edge of the packaging bag body is composed of multiple parallel lines.

[0013] The invention described in claim 7 is a packaging bag equipped with the stopper described in claim 3, characterized in that the multiple parallel lines that form the part of the stopper that welds the packaging bag body and the multiple parallel lines that form the seal part on the outer edge of the packaging bag body are aligned with each other. [Effects of the Invention]

[0014] The plug of the present invention has a slit-shaped non-welded portion at the welded portion where the packaging bag body is not welded, and the packaging bag body can be easily torn from this portion, so that the packaging bag can be easily disassembled and washed when discarded after use.

[0015] Furthermore, since the plug can be molded as a single unit, there is no need to make major changes to the conventional mold, which is also advantageous in terms of cost.

[0016] As in the invention described in claim 2, if the material that makes up the stopper does not contain pigments, there is an advantage that the quality degradation caused by pigments being mixed into the recycled material after recycling is not caused.

[0017] As in the invention described in claim 3, when the part of the welded part of the stopper that welds the packaging bag body is composed of multiple parallel lines, it becomes possible to peel off the laminated body on the front and back surfaces of the welded packaging bag body from the welded part of the stopper, making it easy to separate the packaging bag body and the stopper and recycle the material of the stopper.

[0018] As in the invention described in claim 5, when the laminate constituting the packaging bag body is easy to tear vertically, the packaging bag body can be easily torn vertically, making it possible to use up the contents and easily clean the inside.

[0019] Furthermore, as in the invention described in claim 6, when the seal portion on the outer edge of the packaging bag body is composed of multiple parallel lines, it becomes possible to peel off the seal portion during disassembly and separate the laminated body on the front and back surfaces while maintaining the effect of preventing leakage of the contents. This makes it possible to use up the contents completely after use, makes it easy to clean the inside, and makes recycling easier.

[0020] Furthermore, as in the invention described in claim 7, when the multiple parallel lines that form the part of the stopper that welds the packaging bag body and the multiple parallel lines that form the seal part on the outer edge of the packaging bag body are aligned with each other, the ease of disassembly is further enhanced, and disassembly and cleaning become extremely easy, thereby achieving the effect of maximizing recycling efficiency. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic diagram showing one embodiment of a spout-equipped packaging bag according to the present invention. [Figure 2] FIG. 2 is an enlarged front view of the spout used in the spouted packaging bag shown in FIG. [Figure 3] FIG. 3 is a partially enlarged explanatory view showing another embodiment of the spouted packaging bag using the spout shown in FIG. [Figure 4] FIG. 4 is a schematic explanatory view showing the state in which the main body of the spouted packaging bag shown in FIG. 1 is torn vertically from the spout portion. [Figure 5] FIG. 5 is a schematic front view of a conventional plug. [Figure 6] FIG. 6 is a partially enlarged view of a conventional packaging bag with a spout. DETAILED DESCRIPTION OF THE INVENTION

[0022] The spout and spouted packaging bag according to the present invention will be described in detail below with reference to the drawings. Fig. 1 is a schematic diagram showing one embodiment of the spouted packaging bag according to the present invention. Fig. 2 is an enlarged front view of the spout used in the spouted packaging bag shown in Fig. 1.

[0023] The stopper 1 according to the present invention is a stopper used for a stoppered packaging bag 10, and as shown in Figure 2, has a cylindrical pouring tube 2 for pouring out the contents and a welding part 3 for welding the packaging bag body 11, and is characterized in that the welding part 3 has a slit-shaped non-welded part 4 that does not weld the packaging bag body 11.

[0024] The spout-equipped packaging bag 10 shown in Figure 1 is a packaging bag in the shape of a so-called standing pouch, in which the sealant layers of the front laminate 12 and the back laminate 13 are placed opposite each other, and a bottom tape 14 folded in half with the sealant layer on the outside is inserted between them and the peripheral edges are heat-sealed.

[0025] The stopper 1 is sealed with a cap 6. The cap will be omitted from the following figures. The stopper 1 has a slit-shaped non-welded portion 4, and by providing a tear-start portion 16 in the packaging bag body 11 at a portion that coincides with this non-welded portion, it becomes easy to tear the packaging bag body 11 after use to use up the contents and to clean the inside.

[0026] Fig. 4 is a schematic explanatory diagram showing the state in which the packaging bag body 11 of the spout-equipped packaging bag 10 shown in Fig. 1 is torn vertically from the spout portion. In this example, the laminate constituting the packaging bag body 11 is easy to tear vertically in the easy tear direction 17, so a tear 18 in the laminate runs vertically. This makes it easy to use up the contents and to recycle the packaging bag by cleaning the inside.

[0027] In the stopper 1 shown in Fig. 2, the portion 5 of the welding part 3 that welds the packaging bag body is made up of three parallel lines. This makes it easier to peel the stopper 1 and the packaging bag body 11 apart compared to when the entire surface is welded, and makes it possible to recycle at least the stopper as a material.

[0028] Figure 3 is a partially enlarged explanatory view showing another embodiment of a spouted packaging bag 10 using the spout 1 shown in Figure 2. This example is characterized in that three parallel lines constituting the portion 5 of spout 1 that welds the packaging bag body and three parallel lines constituting the seal portion 15 on the outer edge of the packaging bag body 11 are aligned with each other.

[0029] This configuration not only makes it easy to peel the packaging bag body 11 from the stopper 1 after use, but also makes it easy to peel the front laminate 12 and the back laminate 13 that make up the packaging bag body 11. This makes it easier to use up the contents to the last drop, and to separate the packaging bag body and the stopper after use to clean the inside or recycle the contents.

[0030] It has been confirmed that even if the seal portion 15 is changed from a normal full-surface seal to a seal portion 15 consisting of multiple parallel lines, no practical problems arise in terms of seal strength, bag-breaking resistance, etc.

[0031] Fig. 5 is a schematic front view of a conventional spout 1', and Fig. 6 is a partially enlarged view of a conventional spouted packaging bag 10' using the same. In the conventional spouted packaging bag, the spout 1' and the packaging bag body 11 are firmly welded over the entire surface, making it impossible to separate the spout and the packaging bag body.

[0032] Laminates each consisting of multiple layers are usually used for the front laminate 12, back laminate 13, and bottom tape 14 that make up the packaging bag body 11. The simplest layer configuration is a combination of a heat-resistant base layer and a heat-sealable sealant layer, but an intermediate layer may be added as needed, or a gas barrier layer, a printed layer, etc. may be combined.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] The sealant layer of the laminate is used by welding to the welding portion 3 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.

[0037] 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]

[0038] 1···Seal 1´···Conventional stopper 2...Pour tube 3...Welded area 4. Notched non-welded area 5. Part to be welded 6···Cap 10. Packaging bag with spout 10´···Conventional packaging bag with spout 11...Packaging bag body 12...Front area laminate 13 Back laminate 14 Bottom tape 15 Seal part 16. Starting point of slit 17. Easy tearing direction 18. Laminate cracks

Claims

1. A packaging bag with a stopper, which has a cylindrical dispensing tube for dispensing the contents and a welded part for welding the packaging bag body, and in which the welded part has a slit-like non-welded part that does not weld the packaging bag body, and a slit that serves as a starting point for tearing is provided in the packaging bag body that coincides with the slit-like non-welded part of the welded part of the stopper.

2. 2. The spouted packaging bag according to claim 1, wherein the laminate constituting the main body of the packaging bag is easily torn in the longitudinal direction.

3. 3. The spouted packaging bag according to claim 1, wherein the seal portion on the outer edge of the packaging bag body is formed of a plurality of parallel lines.

4. A packaging bag with a stopper as described in Claim 3, characterized in that it has a cylindrical dispensing tube for dispensing the contents and a welded portion for welding the packaging bag body, and the welded portion has a slit-shaped non-welded portion that does not weld the packaging bag body, and the portion of the welded portion that welds the packaging bag body is a packaging bag with a stopper composed of a plurality of parallel lines, and the parallel lines that constitute the portion of the stopper that welds the packaging bag body and the parallel lines that constitute the seal portion at the outer edge of the packaging bag body are aligned with each other.

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