Container nozzle and packaging container

Abstract

The container nozzle (10) is welded to the packaging bag (20) and is provided with a mounting part (12) welded to the packaging bag (20) and a pouring part (11) protruding from the mounting part (12) to the outside of the packaging bag (20). Four or more ribs (14) are arranged side by side in the direction in which the pour-out section (11) protrudes from the attachment section (12) on the outer peripheral section (13) of the attachment section (12) that is fused to the packaging bag (20), and the width of each of the ribs (14) is 1 mm or more.

Description

Technical Field

[0001] The present invention relates to a container spout and a packaging container.

[0002] This application claims priority based on Japanese Patent Application No. 2023-025826 filed in Japan on February 22, 2023, and incorporates its content herein. Background Art

[0003] As an existing packaging bag, for example, Paragraph 0010 of Patent Document 1 describes a laminated film formed by laminating a stretch film such as polyethylene terephthalate (PET), nylon (Ny), or PP on a sealant such as polyethylene (PE) or polypropylene (PP). In addition, Paragraph 0011 describes that the container spout has a thermoplastic resin layer capable of being welded to the sealant of the packaging bag, and PE, PP, PET, Ny, etc. can be used.

[0004] Prior Art Documents Patent Documents Patent Document 1: Japanese Unexamined Patent Application Publication No. 2006-7630 Summary of the Invention

[0005] Technical Problem In recent years, in order to facilitate recycling, as a single or the same resin, a single-material container packaging using PE or the like has been advocated. However, when a container spout is bonded to a single-material packaging bag, the heat weldability of the packaging bag deteriorates, which may cause a decrease in productivity and deterioration of appearance.

[0006] The present invention has been completed in view of the above circumstances, and an object thereof is to provide a container spout and a packaging container having excellent weldability even for a single-material packaging bag made of a polyethylene-based resin or the like.

[0007] Technical Solution A first aspect of the present invention is a container spout welded to a packaging bag, characterized by having: a mounting portion welded to the packaging bag; and a pouring portion protruding from the mounting portion to the outside of the packaging bag. On the outer peripheral portion of the mounting portion welded to the packaging bag, four or more ribs are arranged side by side in the direction in which the pouring portion protrudes from the mounting portion, and the width of each of the ribs is 1 mm or more. That is, the ribs are arranged at intervals in the direction in which the pouring portion protrudes from the mounting portion. Preferably, the ribs are parallel to each other, but as long as they are spaced apart from each other, they do not have to be strictly parallel.

[0008] The second method is characterized in that, in the first method, a leather grain finish (pear texture finish) is applied to the surface of the rib that is welded to the packaging bag. The leather grain finish refers to a surface treatment in which a fine unevenness is formed on the surface to finish it into a rough texture.

[0009] Based on the first method or the second method, the third method is characterized in that at least the outer peripheral portion of the mounting portion is formed of a polyethylene-based resin. Thus, the surface of the rib that is welded to the packaging bag is formed of a polyethylene-based resin.

[0010] Based on any one of the first method to the third method, the fourth method is characterized in that the packaging bag is composed of a laminated film having two or more resin films (resin layers), and the two or more resin films (resin layers) are formed only of a polyethylene-based resin. The polyethylene-based resins forming each resin film (resin layer) may be exactly the same or may have different compositions.

[0011] The fifth method is a packaging container, characterized in that the container mouth of any one of the first method to the fourth method is welded to the packaging bag.

[0012] Based on the fifth method, the sixth method is characterized in that the packaging bag is composed of a laminated film having two or more resin films (resin layers), and the two or more resin films (resin layers) are formed only of a polyethylene-based resin.

[0013] Technical effects According to the present invention, it is possible to provide a container mouth and a packaging container having excellent heat weldability even for a single-material packaging bag. Description of the drawings

[0014] Figure 1 It is a front view showing an example of the container mouth of the embodiment.

[0015] Figure 2 It is a cross-sectional view showing an example of welding the container mouth of the embodiment to the packaging bag.

[0016] Figure 3 It is a cross-sectional view showing an example of the laminated film used for the packaging bag.

[0017] Figure 4 It is a front view showing a first example of the packaging container.

[0018] Figure 5 It is a front view showing a second example of the packaging container.

[0019] Reference signs 10…Container nozzle, 11…Pouring part, 11a…Front end part, 12…Mounting part, 12a…Base end part, 12b…Boundary part, 13…Outer peripheral part, 14…Rib, 14a…Surface of the rib, 15…Gap part, 16…Protruding end part, 17…Flange part, 18…External thread part, 20…Packaging bag, 20a…Edge part, 20b…Internal space, 21…Sealant, 22…Base material, 23…Packaging material, 24…Main body part, 25…Main body seal part, 26…Bottom part, 27…Bottom seal part, 28…Upper seal part, 29…Opening part, 31, 32…Packaging container, 40…Laminated film, 41…Sealant resin film, 42…Intermediate resin film, 43…Outer resin film, 44, 45…Adhesive layer. Detailed implementation mode

[0020] Hereinafter, the present invention will be described based on preferred embodiments.

[0021] Figure 1 The container nozzle 10 of the embodiment is illustrated. In addition, Figure 2 The part where the container nozzle 10 is welded to the packaging bag 20 is illustrated. The container nozzle 10 illustrated in the figure is welded to the packaging bag 20 and is used for a packaging container having the container nozzle 10 and the packaging bag 20.

[0022] The container nozzle 10 illustrated in the figure has a mounting part 12 and a pouring part 11. The mounting part 12 has an outer peripheral part 13 welded to the packaging bag 20, and the pouring part 11 protrudes from the mounting part 12 to the outside of the packaging bag 20. The mounting part 12 is arranged along the edge part 20a of the packaging bag 20.

[0023] Although not particularly illustrated, the pouring part 11 is cylindrical and has a flow path inside for pouring out the contents of the packaging bag 20. The flow path inside the container nozzle 10 is formed to penetrate from the base end part 12a of the mounting part 12 to the front end part 11a of the pouring part 11. The flow path of the container nozzle 10 opens toward the internal space 20b of the packaging bag 20 on the base end part 12a side.

[0024] The shape of the pouring part 11 is not particularly limited and can be, for example, cylindrical, elliptical cylindrical, square cylindrical, etc. Although not particularly illustrated, a cap or other lid member can be installed on the pouring part 11. A flange part 17, an external thread part 18, etc. can also be formed on the outer peripheral surface of the pouring part 11. When an external thread part 18 is provided on the pouring part 11, an internal thread part is provided on the lid member. The mounting method of the lid member to the pouring part 11 is not limited to screw engagement and can also be fitting, snapping, etc.

[0025] The pouring portion 11 projects in a direction from the base end 12a of the mounting portion 12 toward the front end 11a, and the pouring portion 11 projects from the mounting portion 12. In the container mouth 10 shown in the figure, the flow path is formed straightly from the base end 12a to the front end 11a, and the pouring portion 11 projects in a direction from the base end 12a to the front end 11a. Figure 1 and Figure 2 The pouring portion 11 stands vertically from the center of the upper surface of the base end portion 12.

[0026] In the container mouth 10 shown in the figure, the boundary 12b between the pouring portion 11 and the mounting portion 12 is stepped. Specifically, the cross-sectional shape of the mounting portion 12 on the plane perpendicular to the protruding direction of the pouring portion 11 is larger than the cross-sectional shape of the pouring portion 11. Although not particularly shown, the mounting portion 12 may have the same cross-sectional shape as the pouring portion 11. For example, the pouring portion 11 and the mounting portion 12 may be cylindrical with substantially the same diameter.

[0027] The cross-sectional shape of the mounting portion 12 is not particularly limited, and examples of the cross-sectional shape of the surface perpendicular to the protruding direction of the pouring portion 11 include a circular shape, an elliptical shape, a boat shape, and the like. Here, the boat shape means that when the mounting portion 12 is viewed from above, both ends of the mounting portion 12 in the longitudinal direction protrude in a roughly triangular shape toward each protruding end portion 16, and both side surfaces of the mounting portion 12 are curved in a roughly arc shape. The mounting portion 12 is thickest in the central portion in the long axis direction along the short axis direction. In the example shown in the figure, the long axis direction is Figure 1 The left and right directions, the short axis direction is Figure 2 left and right direction.

[0028] The cross-sectional shape of the flow path inside the container mouth 10 is not particularly limited, and examples of the cross-sectional shape on a plane perpendicular to the protruding direction of the pouring portion 11 include a circular shape, an elliptical shape, a polygonal shape, etc. The inner surface of the flow path may be concentric with the outer surface of the pouring portion 11. The inside of the flow path may be a single space, or may be divided into a plurality of spaces (flow paths) via a partition wall extending in the longitudinal direction of the pouring portion 11.

[0029] The shape of the flow path along the protruding direction of the pouring portion 11 is not particularly limited, and may be a straight line, a curve, a bend, a fold, etc. Although not particularly shown in the figure, in the mounting portion 12, the same flow path may be branched into two or more at the front end side of the pouring portion 11. Alternatively, the front end of the flow path of the container mouth 10 may be opened toward the side of the pouring portion 11 instead of opening at the front end portion 11a of the pouring portion 11.

[0030] The pouring portion 11 may not protrude linearly and perpendicularly from the mounting portion 12. The pouring portion 11 may protrude obliquely from the upper surface of the mounting portion 12, or the pouring portion 11 may be bent along its longitudinal direction. Whether the central axis of the pouring portion 11 is linear or not, the periphery of the boundary portion 12b is preferably arranged flush with the edge portion 20a of the packaging bag 20.

[0031] The container nozzle 10 of the embodiment has a plurality of ribs 14 on the outer peripheral portion 13 of the mounting portion 12. A gap portion 15 is arranged between these ribs 14. As Figure 2 shown, in the direction orthogonal to the protruding direction of the pouring portion 11, the surface 14a of the rib 14 facing the packaging bag 20 protrudes more than the gap portion 15. In addition, the number of the plurality of ribs 14 arranged side by side along the protruding direction of the pouring portion 11 is four or more. As long as it is four or more, any number is acceptable, preferably 4 to 6, and more preferably 4 to 5.

[0032] Each rib 14 of this example extends parallel to the boundary portion 12b between the pouring portion 11 and the mounting portion 12. As a result, after the container nozzle 10 is welded to the packaging bag 20, each rib 14 extends parallel to the edge portion 20a of the packaging bag 20. Each rib 14 preferably extends over the total length of the side surface of the pouring portion 11 between the left and right protruding ends 16. It is preferred that the ribs 14 are parallel to each other, but as long as there is a gap between them, they do not have to be strictly parallel. The width of each rib 14 may be constant in the longitudinal direction of the rib 14, or may not be constant but may have a shape in which the width changes periodically along the longitudinal direction of the rib 14.

[0033] The welding method of the container nozzle 10 is not particularly limited. A heating member may be provided outside the packaging bag 20 to heat in such a manner that a part of the resin is melted between the packaging bag 20 and the container nozzle 10. As specific examples of the welding method, for example, heat sealing, ultrasonic sealing, high-frequency sealing, pulse sealing, etc. can be cited.

[0034] If the packaging material 23 forming the packaging bag 20 is welded to the surface 14a of each rib 14, a plurality of sealing portions are formed along the edge portion 20a of the packaging bag 20. Thereby, the content (not shown) stored in the inner space 20b of the packaging bag 20 does not leak from the welded portion between the container nozzle 10 and the packaging bag 20, and is hermetically sealed.

[0035] However, in the case of existing container mouths, there is a poor sealing performance with respect to the packaging bag 20 made of a single material such as a polyethylene-based resin with a relatively low melting point. As a reason therefor, for example, it can be cited that the packaging bag 20 is formed of a thin packaging material 23 such as a resin film, whereas the container mouth is formed of a molded product with a relatively thick wall thickness. That is, it is considered that this is because the outer surface of the container mouth is difficult to melt, and excessive heat is applied to the packaging bag 20 before the welding is completed, and it is easy to melt the packaging material 23 first.

[0036] For example, in the case where the outer peripheral portion 13 of the mounting portion 12 does not have an uneven structure formed by the ribs 14 and the gap portions 15 and has a smooth surface, heating and pressing during welding are likely to be evenly applied to the entire outer peripheral portion 13. Therefore, it can be said that the outer peripheral portion 13 is not easily melted, and welding defects are likely to occur. The same applies to the case where the number of ribs 14 formed on the outer peripheral portion 13 is one. In the case where the rib 14 is one and the rib width is wide, there is also a problem that sink marks are likely to occur during molding.

[0037] In the case where the number of ribs 14 formed on the outer peripheral portion 13 is two, heating and pressing during welding are concentrated on the surfaces 14a of the two ribs 14. In order to weld the two ribs 14 evenly, it is necessary to evenly apply heating and pressing on a plane including the surfaces 14a of the respective ribs 14. For example, if heating and pressing are not evenly applied to both of the two ribs 14 and an imbalance occurs, the welding of one of the ribs 14 may become unstable.

[0038] In the case where the number of ribs 14 formed on the outer peripheral portion 13 is three, heating and pressing during welding are dispersed on the surfaces 14a of the three ribs 14. In order to weld the three ribs 14 evenly, it is necessary to evenly apply heating and pressing on a plane including the surfaces 14a of the respective ribs 14. However, due to molding errors of the ribs 14 or the like, there is a case where the surfaces 14a of the respective ribs 14 are not aligned on the same plane. In the case where the heating temperature is high, a part of the rib 14 is likely to be deformed by melting, but the melting of the packaging bag 20 may be excessive. In the case where the heating temperature is low, there is a risk of imbalance in heating and pressing for the three ribs 14. In particular, the welding becomes unstable at the two ribs 14 on the base end portion 12a side and the boundary portion 12b side, and if the liquid tightness cannot be ensured only by the middle one rib 14, welding defects may occur.

[0039] In the case where the number of ribs 14 formed on the outer peripheral portion 13 is four or more, in addition to the two ribs 14 on the base end portion 12a side and the boundary portion 12b side, two or more ribs 14 are arranged side by side between them. Therefore, even if there are cases that hinder uniform welding such as non-uniform heights of the surfaces 14a of the ribs 14, welding of at least two or more ribs 14 can be performed. The liquid tightness can be ensured by two or more ribs 14.

[0040] The width of each rib 14 extending in the protruding direction of the pouring-out portion 11 is preferably 1 mm or more. If the width of the rib 14 is too narrow, the sealing portion becomes too thin and it is difficult to achieve good sealing performance. The upper limit value of the width of the rib 14 is not particularly limited, and the width of the rib 14 can be 3 mm or less or 2 mm or less. The surface 14a of each rib 14 is preferably flat in the width direction of the rib 14, and may be slightly chamfered at both ends in the width direction of the rib 14, or may be slightly curved convexly or concavely in the width direction of the rib 14.

[0041] The width of the gap portion 15 is not limited, and is preferably 1 mm or more and 7 mm or less, and may also be 2 mm or more and 6 mm or less. The area ratio of the gap portion 15 in the entire side surface of the mounting portion 12 is not limited, and may be 20% or more and 85% or less, or may be 40% or more and 70% or less. If it is within such a range, the temperature of the rib 14 rises rapidly during sealing and is easily welded, and the strength after welding is also good. After welding, the front end of the rib 14 may be melted to fuse with the packaging bag 20. After forming the sealing portion, a minute gap may be formed between the gap portion 15 and the inner surface of the packaging bag 20, or the recess of the gap portion 15 may be filled with a sealing material.

[0042] Preferably, the surface 14a of the rib 14 relative to the packaging bag 20 is subjected to a leather grain process. The leather grain process is a process of forming minute irregularities on the surface 14a, and the surface 14a can be randomly roughened by polishing, sandblasting, etc., or the irregularities can be transferred using a mold having an uneven surface complementary to the intended leather grain. In the mold for forming the mounting portion 12 of the container nozzle 10, the mold surface for forming the rib 14 may also be subjected to a leather grain process. If such a leather grain process is performed, the anchoring effect on the sealing material after welding is improved to enhance the welding strength.

[0043] The container nozzle 10 is preferably formed of a polyolefin resin such as a polyethylene-based resin or a polypropylene-based resin. The forming method of the container nozzle 10 is not particularly limited, and examples include injection molding and extrusion molding.

[0044] There is no particular limitation on the molding resin of the container nozzle 10. Examples of the polyethylene-based resin include high-density polyethylene (HDPE), medium-density polyethylene (MDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), etc., and examples of the polypropylene-based resin include propylene homopolymer, block copolymer, random copolymer, etc.

[0045] The container spout 10 can be formed of a single resin or by blending or laminating two or more resins. At least a part of the resin used for the container spout 10 can be a resin obtained by reusing used resins. Preferably, at least the outer peripheral portion 13 of the mounting portion 12 is formed of a polyethylene-based resin or a polypropylene-based resin.

[0046] A container spout 10 capable of using two-color molding can be used, but in terms of cost, it is preferable to form the container spout 10 using a single resin. In the case of a two-color molded container spout 10, the inner surfaces of the runners disposed in the pouring portion 11 and the mounting portion 12 can be formed of a suitable material different from the outer peripheral portion 13 of the mounting portion 12, such as a cycloolefin-based resin.

[0047] The packaging material 23 forming the packaging bag 20 can be formed of a single resin or by blending or laminating two or more resins. At least one of the resins used for the packaging material 23 is preferably a polyolefin-based resin. At least a part of the resin used for the packaging bag 20 can be a resin obtained by reusing used resins.

[0048] The packaging material 23 can include, for example, a plurality of resin films such as a sealant 21 and a base material 22. In order to form a single-material packaging bag 20, the resin films included in the packaging material 23 are preferably only polyolefin-based resins, more preferably only polypropylene-based resins or polyethylene-based resins. The resin film included in the packaging material 23 can be only a polyethylene-based resin.

[0049] As the material of the sealant 21, polyolefin-based resins such as polyethylene-based resins and polypropylene-based resins can be cited. For example, in the case of a polyethylene-based resin, specific examples include LLDPE, LDPE, etc. The material forming the sealant 21 can be a single resin or a blend of two or more resins. The thickness of the sealant 21 is not particularly limited, and for example, about 60 to 180 μm can be cited.

[0050] The material of the base material 22 is not particularly limited, and examples include resins, paper, cellophane, metal foils, etc. As the resin of the base material 22, there is no particular limitation, and examples include polyolefin-based resins such as polyethylene-based resins and polypropylene-based resins, polyester-based resins such as PET, and polyamide resins such as Ny.

[0051] In a single-material package, the base material 22 preferably uses polyolefin-based resins such as polyethylene-based resins and polypropylene-based resins. As specific examples, for example, resin films such as LLDPE, LDPE, MDPE, HDPE, and PP can be cited. The thickness of the base material 22 is not particularly limited, and for example, as each layer thickness or total thickness, about 10 to 50 μm can be cited.

[0052] The base material 22 can include a stretched resin film. For example, as Figure 3As shown, when the laminated film 40 that becomes the packaging material 23 includes a sealant resin film 41, an intermediate resin film 42, and an outer resin film 43, it is preferable to use a stretched resin film for the intermediate resin film 42 adjacent to the sealant resin film 41. The intermediate resin film 42 is preferably a uniaxially or biaxially stretched polyethylene-based resin film.

[0053] There are no particular limitations on the stretching direction, stretching ratio, etc. of the stretched resin film, and it can be stretched along the machine direction (MD) and the transverse direction (TD). The stretching ratio is preferably in the range of 2 to 10 times in both the MD direction and the TD direction. The stretching ratio in the MD direction and the stretching ratio in the TD direction may be equal to each other or different.

[0054] When using the two layers of the intermediate resin film 42 and the outer resin film 43 as the base material 22, it is possible that the intermediate resin film 42 uses a biaxially stretched polyethylene-based resin film and the outer resin film 43 uses a uniaxially stretched polyethylene-based resin film. The sealant resin film 41 can be an unstretched polyethylene-based resin film.

[0055] Each layer in the packaging material 23 such as the laminated film 40 can be laminated with an adhesive layer 44, 45 therebetween by dry lamination, sandwich lamination, etc. It is also possible to omit the adhesive layers 44, 45 and laminate a plurality of resin films by coextrusion, thermal lamination, extrusion lamination, etc. The same laminated film 40 can also be used together for lamination with an adhesive layer 44, 45 between layers and lamination without an adhesive layer 44, 45 between layers.

[0056] When forming the adhesive layers 44, 45 by the dry lamination method, there are no particular limitations, and urethane-based compounds, epoxy-based compounds, isocyanate-based compounds, polyethyleneimine, organotitanium compounds such as titanium alkoxides, etc. can be used.

[0057] When forming the adhesive layers 44, 45 by extruding a resin, for example, polyolefin-based resins such as polyethylene-based resins and polypropylene-based resins, and adhesive resins such as modified resins can be used.

[0058] Although not particularly shown, a printing layer, a vapor deposition layer, etc. can be formed on at least one side of each resin film. The printing layer can be formed using solvent-based ink, or can be formed in a solvent-free manner using curable inks such as electron beam curing and ultraviolet curing. The vapor deposition layer can be formed of a metal such as aluminum, or an inorganic compound such as silicon dioxide and aluminum oxide. A metal foil can be laminated on the resin film. In a single-material package, the metal foil may not be used, and only a thin vapor deposition layer may be used, or even the vapor deposition layer may not be used.

[0059] From the viewpoint of interlayer adhesion, a printing layer or a barrier layer may not be formed between the sealant 21 and the substrate 22, particularly between the sealant resin film 41 and the intermediate resin film 42, and they may be laminated only with the adhesive layers 44 and 45 interposed therebetween. A printing layer or a barrier layer may be laminated inside the substrate 22, for example, between the intermediate resin film 42 and the outer resin film 43, etc.

[0060] The polyolefin resin used for the container mouth 10, the packaging material 23, the laminated film 40, etc. may be a homopolymer of a specific olefin or a copolymer mainly composed of a specific olefin. In the polyethylene resin, ethylene is the specific olefin, and in the polypropylene resin, propylene is the specific olefin.

[0061] In the polyolefin polymer mainly composed of a specific olefin, the proportion of the specific olefin in the constituent monomers is preferably 50% by weight or more, for example, it may be 80 - 100% by weight. In the homopolymer, the proportion of the specific olefin in the constituent monomers is substantially about 100% by weight. In the copolymer, monomers other than the specific olefin are copolymerized in an appropriate proportion.

[0062] When listing the monomers used in the polyolefin polymer without distinguishing between the specific olefin and other monomers, one or more of α-olefins such as ethylene, propylene, 1-butene, 1-hexene, 1-octene, cycloolefins such as norbornene, vinyl acetate, vinyl chloride, vinyl monomers such as acrylic acid, etc. can be listed. These monomers can be derived from fossil resources such as petroleum or from biomass such as plants. At least a part of the monomers can be monomers obtained by recycling used resins.

[0063] The resin used for the container mouth 10 and / or the packaging bag 20 may contain other resins and / or additives within an appropriate range. There is no particular limitation on the resin additives, and examples thereof include antioxidants, lubricants, anti-blocking agents, flame retardants, ultraviolet absorbers, light stabilizers, antistatic agents, colorants, crosslinking agents, etc.

[0064] The molded article (container mouth 10 or resin film) mainly composed of a polyolefin resin may contain a resin other than the polyolefin resin in an appropriate proportion. In addition, the molded article (container mouth 10 or resin film) mainly composed of a polyethylene resin may contain a resin other than the polyethylene resin in an appropriate proportion.

[0065] When the container mouth 10 is mainly composed of a polyethylene resin, it is preferable that the packaging material 23 such as the laminated film 40 is also mainly composed of a polyethylene resin. The proportion of the polyethylene resin contained in the container mouth 10 and / or the packaging bag 20 is preferably 50% by weight or more, and for example, it may also be 80 - 100% by weight respectively.

[0066] When the packaging bag 20 is formed of a packaging material 23 such as a laminated film 40 having two or more resin films, the two or more resin films may be formed of only a polyethylene-based resin.

[0067] In order to make the container mouth 10 and / or the packaging bag 20 a container package of a single material formed of a specific resin, it is preferable that the total of the specific resin is 80% by weight or more with respect to the total weight of the container mouth 10 and / or the packaging bag 20 and the total of the materials other than the specific resin is 20% by weight or less with respect to the total weight of the container mouth 10 and / or the packaging bag 20. More preferably, the total of the specific resin is 90% by weight or more with respect to the total weight of the container mouth 10 and / or the packaging bag 20 and the total of the materials other than the specific resin is 10% by weight or less with respect to the total weight of the container mouth 10 and / or the packaging bag 20. As the specific resin, for example, any one of a polyethylene-based resin, a polypropylene-based resin, or a polyolefin-based resin can be selected.

[0068] Specific examples of the packaging bag 20 are not particularly limited, and examples include a three-side sealed bag, a four-side sealed bag, a pillow bag, a flat bag, a gusset bag, a standing pouch, etc. In Figure 4 and Figure 5 Specific examples of the packaging containers 31 and 32 using the standing pouch as the packaging bag 20 are shown. In these figures, the illustration of the rib 14 of the mounting portion 12 is omitted.

[0069] The main body member 24 of the packaging bag 20 used for the packaging containers 31 and 32 is composed of a pair of packaging materials 23 and is formed by sandwiching a bottom member 26 therebetween. The bottom member 26 is folded in half and disposed at the lower part of the main body member 24. At a position above the bottom member 26, main body seal portions 25 are formed on the left and right to join the front and rear main body members 24. The bottom member 26 is joined to the main body member 24 by a bottom seal portion 27. If the bottom member 26 is unfolded, the packaging bag 20 can stand on its own.

[0070] In Figure 4 In the packaging container 31 of the first example shown, the container mouth 10 is adhered to the central portion of the upper seal portion 28 so as to face upward, and the inside of the packaging bag 20 is sealed. In Figure 5 In the case of the packaging container 32 of the second example shown, an opening portion 29 is formed at the upper part of the main body member 24 so as to be in contact with one side of the main body seal portion 25. A part of the upper seal portion 28 is formed obliquely, and the container mouth 10 is adhered in an inclined manner. After filling the packaging bag 20 with the content from the opening portion 29, the packaging bag 20 can be sealed by joining the unsealed portion of the opening portion 29.

[0071] The mounting orientation of the container nozzle 10 in the vertical direction with respect to the packaging bag 20 is not particularly limited, and it can be selected from appropriate orientations such as upward, obliquely upward, horizontal, downward, etc. Two or more container nozzles 10 can also be installed on the same packaging bag 20.

[0072] The size of the packaging bag 20 is not particularly limited. For example, in the application of reusable containers, the height in the vertical direction can be about 100 to 500 mm, the width in the horizontal direction can be about 70 to 300 mm, and the filling volume can be 100 cm 3 ~5000 cm 3 or so.

[0073] The state of the content stored in the packaging bag 20 is not particularly limited. For example, fluids such as liquids, powders, and granular materials, or solid substances such as articles can be listed. The type of the content is not particularly limited, and detergents, medicines, cosmetics, pharmaceuticals, beverages, seasonings, inks, paints, fuels, etc. can be listed.

[0074] The present invention has been described based on the preferred embodiments, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention. Examples of the changes include addition, replacement, omission, and other modifications of the components.

[0075] The method of reusing the container nozzle 10 or the packaging bag 20 after use in the embodiment is not particularly limited, and it can be appropriately selected according to the state at the time of recycling. According to the embodiment, since the proportion of the polyolefin resin can be increased, it can be either chemical recycling or mechanical recycling. It can be regenerated into the same kind of products as the container nozzle 10 or the packaging bag 20 through recycling. The materials obtained by recycling can be used for products such as paints, molded products, and hydrocarbon oils.

[0076]

Examples

[0077] Using a polyethylene resin, by changing the number of ribs, the width of the ribs, and the presence or absence of a sandpaper finish, as shown in Table 1, the container mouths of Comparative Examples 1 to 4 and Examples 1 to 2 were produced. In the case of four ribs, for the width obtained by adding the width of one rib and the width of one gap portion, it was set to 2.8 mm when the rib width was 0.7 mm, 3.0 mm when the rib width was 1.0 mm, and 3.3 mm when the rib width was 1.4 mm. Additionally, in the case of three ribs, the width obtained by adding the width of one rib and the width of one gap portion was set to 4.3 mm (rib width 1.4 mm). The shape of the mounting portion is boat-shaped when viewed from above, the dimension in the length direction of the mounting portion is 35 mm, the maximum thickness in the width direction when viewed from above of the mounting portion is 18 mm, and the height of the side surface of the mounting portion is 10 mm.

[0078] After molding the container mouth, it was checked whether sink marks were generated on the outer peripheral surface of the mounting portion sealed to the packaging bag. Regarding the moldability of the container mouth, it was evaluated as good (○) when there were no sink marks, and as poor (×) when sink marks were observed.

[0079] As the packaging material used in the production of the packaging bag, a laminated film obtained by laminating a three-layer structure of uniaxially stretched polyethylene 25 μm / biaxially stretched polyethylene 25 μm / polyethylene for sealant 150 μm by dry lamination was used. In the evaluation of the sealing performance, the laminated film was overlapped on the outer peripheral surface of the container mouth, and after sealing for 0.5 seconds using a mold at a predetermined temperature (135 °C or 140 °C), the appearance of the sealed portion was checked and the sealing strength was measured.

[0080] Regarding the appearance of the sealed portion, it was evaluated as good (○) when there were no holes in the laminated film at the sealed portion, and as poor (×) when holes were confirmed.

[0081] Regarding the sealing strength, it was evaluated as good (○) when the interface between the laminated film and the container mouth did not peel even when a tensile force was applied within the practical range, and the laminated film did not break between the sealed portion and the unsealed portion, and as poor (×) when the strength of peeling or breaking was insufficient.

[0082] Regarding the stability, it was evaluated as good (○) when there was no difference in the evaluation results at sealing temperatures of 135 °C or 140 °C, and as poor (×) when the evaluation results of the appearance or strength differed depending on the sealing temperature. The above results are shown together in Table 1.

[0083]

Table 1

[0084] As shown in Table 1, the moldability and sealing performance of the container nozzles of Example 1 and Example 2 are both excellent. The moldability and strength of the container nozzle of Comparative Example 1 without ribs are poor. The appearance and strength of the sealing performance of the container nozzles of Comparative Examples 2 to 3 with a narrow rib width are poor.

[0085] For the container nozzle of Comparative Example 4 with three ribs, the sealing strength decreases as long as the sealing temperature is slightly lower. Therefore, when the sealing strength for the ribs at the upper and lower ends becomes unstable according to the sealing temperature, it is necessary to maintain the strength only by using the middle rib, and there is a problem with stability in the case of repeated production multiple times.

Claims

1. A container mouth, characterized in that: It is a container mouth welded to the packaging bag and has: A mounting portion welded to the packaging bag; and a pouring portion protruding from the mounting portion toward the outside of the packaging bag, In the outer peripheral portion of the mounting portion welded to the packaging bag, four or more ribs are arranged in parallel in the direction in which the pouring portion protrudes from the mounting portion, and each of the ribs has a width of 1 mm or more.

2. The container mouth according to claim 1, characterized in that The surface of the rib facing the packaging bag is subjected to a pear skin treatment.

3. The container mouth according to claim 1, characterized in that At least the outer peripheral portion of the mounting portion is formed of a polyethylene-based resin.

4. The container mouth according to any one of claims 1 to 3, characterized in that: The packaging bag is composed of a laminated film having two or more layers of resin films, and the two or more layers of resin films are formed only of a polyethylene-based resin.

5. A packaging container, characterized in that: The container spout according to any one of claims 1 to 3 is welded to a packaging bag.

6. The packaging container according to claim 5, characterized in that: The packaging bag is composed of a laminated film having two or more layers of resin films, and the two or more layers of resin films are formed only of a polyethylene-based resin.

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