JP2019127310A - Spout closing body and manufacturing method of spout closing body - Google Patents

Abstract

To provide a spout closing body and a manufacturing method of the spout closing body in which a content does not remain and a wrinkle is not generated.SOLUTION: A spout closing body 10 for closing a spout formed in a spouting part is arranged inside a mouth head part that forms the outer shell of a spouting unit constituting the closed container, the mouth head part having the spouting part and a shoulder part that projects radially outward from the spouting part. The closing body is composed of a cylindrical part 11 disposed inside the spouting part and an overhanging part 15 disposed inside the shoulder part. The cylindrical part 11 and the overhanging part 15 have a drawable aluminum layer and a first resin layer provided on at least one surface of the aluminum layer. A manufacturing method thereof is also provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a spout closing body and a method for manufacturing a spout closing body, and more specifically, a spout closing body for closing a spout for pouring out the contents contained in a closed container, and the spout thereof. The present invention relates to a manufacturing method of a closure.

  Some containers that contain contents include at least a pouring unit and a body part that contains the contents. In such a container, the contents are poured out from the pouring outlet of the pouring unit by hand crushing the body portion containing the contents. Containers are used, for example, as containers for storing foodstuffs, medicines, cosmetics and the like. For example, in a tube container, the pouring unit has an oral part forming the shell of the pouring unit and a closing body arranged inside the oral part. The mouth head that forms the outer shell has a cylindrical pouring portion and a shoulder portion that projects outward from the base of the pouring portion, and is formed by molding a material such as resin. On the other hand, the closed body is formed by subjecting a raw fabric made of a plurality of layers to predetermined processing. Various forms have been proposed so far for the original fabric forming the closing body and the closing body formed from the original fabric.

  In Patent Document 1, a pouring unit is proposed. The pouring unit proposed in the document has a mouth with a spout for pouring out the contents, and a passage closing body that is provided inside the mouth and closes the spout. . In the pouring unit, the oral part is formed by compression molding (compression method). For the oral part, linear low density polyethylene (LLDPE) resin is used. On the other hand, the passage closing body is made of, for example, a multi-layer base fabric having a sealant film of an inner layer and an outer layer, and a barrier layer as an intermediate layer. The barrier layer of the passage closing body is made of nylon resin such as aluminum foil, metal vapor deposition film, silica vapor deposition film, ethylene-vinyl alcohol copolymer resin (EVOH), polymetaxylylene adipamide (MXD6), etc. Yes. Such passage closing body is formed in a predetermined shape by drawing.

  The pouring unit proposed in Patent Document 2 is composed of the oral head and a closing body disposed inside thereof. The closed body proposed in this document is composed of a laminated film including a polyolefin resin, a first biaxially stretched polyester film, a metal foil, and a second biaxially stretched polyester film from the outside. The closing body is formed in a predetermined shape by drawing the film of such a layered structure.

JP 2011-148512 A International Publication No. WO 2007/043198

  However, the closures proposed in Patent Document 1 and Patent Document 2 are wrinkled. Therefore, when the contents are poured out of the tube container, the contents remain at the position of the wrinkle. In addition, the wrinkles deteriorate the appearance of the completed tube container, or use extra material for the wrinkles.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a spout closure and a method for manufacturing the spout closure without wrinkle formation.

  (1) A spout closing body according to the present invention for solving the above-described problems is disposed inside an oral head that forms an outer shell of a pouring unit that constitutes a closed container, and the oral head includes a pouring part. And a shoulder for projecting radially outward from the pouring part, and a closing body for closing the pouring port formed in the pouring part, which is disposed inside the pouring part The tubular portion and an overhang portion disposed on the inside of the shoulder portion, and the tubular portion and the overhang portion are provided on a drawable aluminum layer and at least one surface of the aluminum layer. And one resin layer.

  According to this invention, since it has the drawable aluminum layer and the first resin layer provided on at least one side of the aluminum layer, the raw material for the spout closure body can have appropriate ductility. And can be drawn to form the spout closure. The drawn spout closure can be wrinkle free.

  In the spout closure body according to the present invention, a second resin layer is provided on the surface of the first resin layer opposite to the aluminum layer.

  According to the present invention, since the second resin layer is provided on the surface of the first resin layer opposite to the aluminum layer, the function different from the function of the first resin layer in the second resin layer Can be given.

  In the spout closure body according to the present invention, the first resin layer is a polyamide resin layer, a polyester resin layer, or a polyolefin resin layer.

  According to this invention, since the first resin layer is a polyamide-based resin layer, a polyester-based resin layer, or a polyolefin-based resin layer, the weldability, heat resistance, chemical resistance, low elution, etc. Can be added.

  In the spout closure body according to the present invention, the second resin layer is a polyester resin layer or a cyclic polyolefin resin layer.

  According to this invention, since the polyester-based resin layer or the cyclic polyolefin-based resin layer of the second resin layer has non-adsorptiveness, when the spout closure body is molded using the raw material for the spout closure body, It is possible to suppress the component adsorption of the substance in contact with the inside of the spout closure.

  In the spout closure according to the present invention, the thickness of the aluminum layer is in the range of 50 μm to 200 μm, and the purity of the aluminum constituting the aluminum layer is 98.0% or more.

  According to this invention, since the thickness of the aluminum layer is in the range of 50 μm or more and 200 μm or less and the purity of the aluminum constituting the aluminum layer is 98.0% or more, the raw material for the spout closure body is drawn. When done, the aluminum layer can be properly stretched without being split and shaped into a desired shape.

  In the spout closure according to the present invention, an adhesive layer is formed between the aluminum layer and the first resin layer and / or between the first resin layer and the second resin layer. Is provided.

  According to this invention, since the adhesive layer is provided as described above, the aluminum layer and the first resin layer peel off, and the first resin layer and the second resin layer peel off Can be suppressed.

  In the spout closure according to the present invention, a resin layer containing a lubricant is provided on the surface of the aluminum layer, or the coefficient of static friction and the coefficient of dynamic friction of the aluminum layer are less than 0.3.

  According to the present invention, the surface of the aluminum layer is provided with a resin layer containing a lubricant, or the static friction coefficient and the dynamic friction coefficient of the aluminum layer are less than 0.3. When drawing, friction generated between the die for drawing can be suppressed, and appropriate slippage can be generated between the die and the raw material for the outlet closing body. As a result, it is possible to suppress the separation of the aluminum layer in the process of drawing, the occurrence of variations in the thickness of the aluminum layer, and the occurrence of wrinkles.

  In the spout closure according to the present invention, at least the outer surface of the outer surface and the inner surface of the cylindrical portion and the projecting portion is formed as a smooth surface without wrinkles.

  According to the present invention, since there is no wrinkle, the rate of occurrence of defects in the subsequent process can be reduced, and the material can be reduced. It can be moved smoothly without leaving the contents. The appearance of the outlet closure can be made beautiful.

  In the spout closure according to the present invention, the thickness of the portion closing the spout in the cylindrical portion is the area outside the portion closing the spout portion in the cylindrical portion and the tubular portion It is thinner than the thickness of the peripheral part which makes the peripheral surface of.

  According to the present invention, when utilizing the container using the spout closure, the spout closure can be easily pierced at the position of the spout.

  (2) A method for manufacturing a spout closing body according to the present invention for solving the above-described problem is disposed inside an oral head that forms an outer shell of a pouring unit constituting a closed container, A method for producing a spout closing body having a spout portion and a shoulder portion projecting radially outward from the spout portion and closing a spout formed in the spout portion, As the outlet closing body, a raw material for a spout closing body having a drawable aluminum layer and a first resin layer provided on at least one side of the aluminum layer is used, and the thickness of the aluminum layer is 50 μm or more. A range of 200 μm or less, and the purity of aluminum constituting the aluminum layer is 98.0% or more, and a resin layer containing a lubricant is provided on the surface of the aluminum layer, or static friction of the aluminum layer Coefficient and motion The friction coefficient is less than 0.3, and the raw material for the injection port closing body is drawn.

  According to this invention, the first resin layer is provided on at least one surface of the aluminum layer, the thickness of the aluminum layer is 50 μm to 200 μm, and the purity of the aluminum constituting the aluminum layer is 98.0% or more The surface of the aluminum layer is provided with a resin layer containing a lubricant, or the static friction coefficient and the dynamic friction coefficient of the aluminum layer are less than 0.3. Friction generated between the mold for molding and the mold can be suppressed, and the slippage of the raw material for the outlet closing body with respect to the mold can be improved. As a result, it is possible to prevent the aluminum layer from being divided in the process of drawing, to prevent the occurrence of variations in the thickness of the aluminum layer, or to prevent the occurrence of wrinkles.

  In the method for manufacturing a spout closure according to the present invention, the raw material for spout closure for which the second resin layer is provided on the surface of the first resin layer opposite to the aluminum layer is drawn. Is done.

  According to this invention, the spout closing body which added the function different from the function of the 1st resin layer to the 2nd resin layer can be manufactured.

  According to the present invention, it is possible to prevent wrinkles from forming on the spout closing member constituting the spout unit.

It is a perspective view of the spout closure concerning the present invention. It is the schematic diagram which showed typically an example of the layer structure of the original fabric for spout closing bodies comprised as a spout closing body which concerns on this invention. It is an explanatory view for explaining a manufacturing process of a spout closure. It is a longitudinal cross-sectional view of the pouring unit in which the spout closure concerning the present invention is used. It is the top view which looked at the pouring part side by the various shapes of a pouring unit. It is the perspective view which decomposed | disassembled and showed the tube container in which the spout closing body based on this invention is used for each component. It is the schematic diagram which showed the layer structure of the trunk | drum of a tube container typically.

  The method for manufacturing the spout closure 10 and the spout closure 10 according to the present invention will be described in detail with reference to the drawings. The present invention can be modified in various ways as long as it has the technical features, and is not limited to the embodiments specifically shown below.

[Basic structure of spout closure]
The spout closing body 10 according to the present invention is disposed inside an oral head 21 that forms an outer shell of a pouring unit 20 that constitutes a tube container 100 that is a closed container. This is a closed body for closing a spout 24 formed in the spout 22 having a shoulder 25 projecting radially outward from the spout 22. This closing body is constituted by the cylindrical portion 11 disposed inside the pouring portion 22 and the projecting portion 15 disposed inside the shoulder 25. The cylindrical portion 11 and the projecting portion 15 are drawn and formed. It is characterized in that it has a possible aluminum layer 5 and a first resin layer 6 provided on at least one side of the aluminum layer 5. Moreover, the raw material 1 for spout closure bodies which comprises the spout closure body 10 is provided with the aluminum layer 5, the 1st resin layer 6, and the 2nd resin layer 7 as needed, and also the surface of the aluminum layer 5 It is also possible to provide a resin layer 8 containing a lubricant.

[Basic structure of manufacturing method of spout closure body]
The method for manufacturing the spout closure 10 according to the present invention is disposed inside the oral portion 21 forming the outer shell of the pouring unit 20 constituting the tube container 100 which is a closed type container, and the oral portion 21 This is a method for manufacturing the spout closing body 10 for closing a spout 24 formed in the spout 22 having a portion 22 and a shoulder 25 projecting radially outward from the spout 22. In the manufacturing method of the spout closure body 10, the cylindrical portion 11 and the overhang portion 15 include the aluminum layer 5 that can be drawn and the first resin layer 6 provided on at least one surface of the aluminum layer 5. The raw material 1 for spout closure bodies which has is used. Moreover, in this manufacturing method of the spout closure body 10, the 2nd resin layer 7 provided on the 1st resin layer 6 is provided as needed, or the surface of the aluminum layer 5 contains a lubricant. There is a feature in that the resin layer 8 is provided, or the raw material 1 for the outlet closing body is drawn by making the static friction coefficient and the dynamic friction coefficient of the aluminum layer 5 less than 0.3.

  According to the spout closing body 10 and the manufacturing method of the spout closing body 10 according to the present invention, it is possible to prevent wrinkles from being formed in the spout closing body 10 constituting the spout unit 20. The effect of. Furthermore, since wrinkles are not possible, the effect that the contents can be prevented from remaining on the wrinkles is also achieved.

  Hereinafter, the specific structure of the manufacturing method of the spout closure 10 and the spout closure 10 is demonstrated.

[Outlet closure body]
FIG. 1 shows an example of the spout closure 10. The spout closing body 10 is a component for closing a spout 24 that is disposed inside the oral head 21 and formed at the upper end of the oral head 21. In addition, the specific structure of the pouring unit 20 including the pouring outlet closing body 10 and the oral head 21 will be described later.

  The spout closure 10 includes a cylindrical portion 11 and a projecting portion 15 protruding outward in the radial direction at the position of the root of the cylindrical portion 11. The cylindrical portion 11 is configured of a circumferential surface portion 12 and a top surface portion 13. The circumferential surface portion 12 is a portion that constitutes the side circumferential surface of the cylindrical portion 11. The peripheral surface portion 12 has a function of smoothly guiding the contents toward the spout 24 when the contents are sent out from the trunk portion 40 of the tube container 100 toward the spout 24 in the completed tube container 100. have. The top surface portion 13 is a portion in which the upper end of the circumferential surface portion 12 is closed. The top surface portion 13 prevents the contents from being exposed to the open air by closing the outlet 24 of the tube container 100 in the completed tube container 100. The top surface portion 13 is formed with a thin wall portion 14 having a circular outline formed so as to be thin. The thin-walled portion 14 is a component for facilitating the formation of a hole in the top surface portion 13 in order to pour out the contents from the inside of the tube container 100. In other words, the thickness of the portion of the tubular portion 11 that closes the spout 24 is the area outside the portion of the tubular portion 11 that closes the dispensing portion 24 and the circumference that forms the peripheral surface of the tubular portion 11. It is thinner than the thickness of the surface portion 12.

  The projecting portion 15 is a dome-shaped portion projecting outward from the base of the tubular portion 11 in the radial direction. The outer peripheral edge of the projecting portion 15 is formed in a circular shape. Further, the diameter of the overhanging portion 15 is formed to be the same as or slightly larger than the diameter of the body portion 40 of the completed tube container 100. The overhanging portion 15 has a function of smoothly guiding the contents toward the cylindrical portion 11 when the contents are sent from the trunk portion 40 to the spout 24 in the completed tube container 100. The layer structure of the spout closing member 10 is such that the aluminum layer 5 and the first resin layer 6 are laminated in order from the outside. In addition, the second resin layer 7 is laminated on the inside of the first resin layer 6 as necessary.

  At least the outer surface of the outer surface and the inner surface of the cylindrical portion 11 and the projecting portion 15 is formed as a smooth surface free from wrinkles, in the outlet closure 10 having such a configuration.

[Original fabric for outlet closure body]
FIG. 2 shows a layer structure of the raw material 1 for the spout closure body formed as the spout closure body 10 shown in FIG. As shown in FIG. 2 (A), the spout closure body blank 1 is made of a film material composed of a plurality of layers. Specifically, the raw material 1 for a spout closing body has at least two layers of an aluminum layer 5 and a first resin layer 6 and is formed into three layers including a second resin layer 7 as necessary. . When it is formed as a closure for the pouring spout 24, the spout closure raw material sheet 1 is sequentially stacked in the order of the above layers from the outside of the spout closure 10, and the innermost layer 61 in contact with the contents is It becomes the first resin layer 6 or the second resin layer 7. In addition, as shown in FIG. 2 (B), in addition to the aluminum layer 5, the first resin layer 6, and the second resin layer 7, the aluminum layer 5 is added to the spout closing body raw fabric 1 as necessary. It is also possible to provide a resin layer 8 containing a lubricant on the surface.

(First resin layer)
The first resin layer 6 is made of polyamide resin, polyester resin, polyolefin resin or the like.

  The polyamide-based resin used for the first resin layer 6 is not particularly limited as long as it can be used for the raw material 1 for a spout closing body. Examples of the polyamide-based resin include 6-nylon, 66-nylon, 12 nylon, 6-12 nylon, or an aromatic polyamide containing a xylylene group. This polyamide-based resin improves the followability of the aluminum layer 5 described later when the drawing process is performed on the spout closing body raw fabric 1 or improves the strength of the spout closing body raw fabric 1. And can provide pinhole resistance.

  The polyolefin resin used for the first resin layer 6 is not particularly limited as long as it can be used for the raw material 1 for a spout closing body. Examples of the polyolefin resin include low density polyethylene, linear low density polyethylene, polypropylene, and ethylene-vinyl acetate copolymer. This polyolefin-based resin can impart weldability, flexibility and the like to the raw material 1 for a spout closing member.

  In the example of the layer configuration shown in FIG. 2A, the first resin layer 6 is provided only on one side of the aluminum layer 5 between the second resin layer 7 and the aluminum layer 5 described later. However, the first resin layer 6 can be provided on the other surface side of the aluminum layer 5, or can be provided on both surfaces of the aluminum layer 5.

(Second resin layer)
The second resin layer 7 is made of, for example, a polyester resin, a cyclic polyolefin resin, or the like. The second resin layer 7 is provided on the surface of the first resin layer 6 opposite to the aluminum layer 5. Therefore, it is possible to give the second resin layer 7 a function different from the function of the first resin layer 6.

  The polyester resin used for the first resin layer 6 and the second resin layer 7 is not particularly limited as long as it can be used for the raw material 1 for outlet spout closure. Examples of the polyester resin include a copolymer containing an acid component mainly composed of an aromatic dicarboxylic acid and a diol component mainly composed of an aliphatic diol (glycol). In this copolymer, the acid component and the diol component are linked by an ester bond. As a raw material of the acid component, a derivative capable of forming an ester such as a lower alkyl ester (for example, methyl ester) or an acid halide can also be used.

  As an acid component, aromatic dicarboxylic acid, aliphatic dicarboxylic acid, tricarboxylic acid etc. can be mentioned. Examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, naphthalene-1,4-dicarboxylic acid, and naphthalene-2,6-dicarboxylic acid. Examples of aliphatic dicarboxylic acids include adipic acid and sebacic acid. Moreover, as a diol component, ethylene glycol, cyclohexane dimethanol, neopentyl glycol, a bisphenol compound or its ethylene oxide adduct etc. can be mentioned, for example.

  The cyclic polyolefin resin is not particularly limited as long as it can be used for the raw material 1 for a spout closing member. As cyclic polyolefin resin, the polymer of various cyclic olefin monomers can be mentioned, for example. Examples of the cyclic olefin monomer include a bicyclic cycloolefin, a tricyclic cycloolefin, a tetracyclic cycloolefin, and a pentacyclic cycloolefin. Examples of the bicyclic cycloolefin include norbornene, norbornadiene, methylnorbornene, dimethylnorbornene, ethylnorbornene, chlorinated norbornene, chloromethylnorbornene, trimethylsilylnorbornene, phenylnorbornene, cyanonorbornene, dicyanonorbornene, methoxycarbonylnorbornene, pyridylnorbornene, nadic An acid anhydride, nadic imide and the like can be mentioned. Examples of tricyclic cycloolefins include dicyclopentadiene, dihydrodicyclopentadiene and alkyls, alkenyls, alkylidenes and aryl substituents thereof. Examples of the tetracyclic cycloolefin include dimethanohexahydronaphthalene, dimethanooctahydronaphthalene and alkyl, alkenyl, alkylidene, and aryl-substituted products thereof. Examples of the pentacyclic cycloolefin include tricyclopentadiene, and examples of the hexacyclic cycloolefin include hexacycloheptadecene.

  In addition, as cyclic polyolefin, the copolymer of a cyclic olefin monomer and other monomers, such as ethylene, and those hydrogenated substances etc. can be mentioned to others.

  Examples of preferable resins used for the second resin layer 7 include isophthalic acid-modified polyethylene terephthalate resin, cyclic olefin polymer, and cyclic olefin copolymer.

  The resin used for the second resin layer 7 can contain an additive. Examples of the additive include an antioxidant, a lubricant, an antiblocking agent, a flame retardant, an ultraviolet absorber, a light stabilizer, an antistatic agent, and a colorant.

(Aluminum layer)
The aluminum layer 5 is a barrier layer provided with gas barrier properties and water vapor barrier properties. The aluminum layer 5 has a thickness and a purity capable of drawing and processing. Specifically, the thickness of the aluminum layer 5 is in the range of 50 μm or more and 200 μm or less, preferably in the range of 50 μm or more and 150 μm or less, more preferably in the range of 70 μm or more and 100 μm or less. I have. When the thickness of the aluminum layer 5 is thinner than 50 μm, the aluminum layer 5 is divided when the spout closing body raw fabric 1 is drawn. On the other hand, if the thickness of the aluminum layer 5 is 50 μm or more, the aluminum layer 5 is not divided when drawn, and extends along with the molding operation of the mold. On the other hand, the purity of the aluminum constituting the aluminum layer 5 is 98.0% or more, preferably 99.9% or more. Therefore, the aluminum layer 5 can be provided with appropriate softness, and the spout closing body raw fabric 1 can be provided with ductility suitable for drawing.

  The aluminum constituting the aluminum layer 5 is, for example, an industrial pure aluminum in the 1000s, an aluminum-manganese alloy whose strength is increased without decreasing the workability and corrosion resistance of pure aluminum by adding manganese. The 3000 series, 8000 series such as an aluminum-lithium based alloy developed as a rapidly solidified powder metallurgical alloy or a low density and high rigidity material can be suitably used.

  A resin layer 8 containing a lubricant is provided on the surface of such an aluminum layer 5, or the static friction coefficient and the dynamic friction coefficient of the aluminum layer 5 are treated to be less than 0.3. When the resin layer 8 containing a lubricant is provided, or when the static friction coefficient and the dynamic friction coefficient of the aluminum layer 5 are less than 0.3, when the squeezing property is applied to the raw material 1 for the spout closure body, It is possible to suppress the friction generated between the raw fabric 1 and the mold and to improve the slip of the mold relative to the raw material 1 for the injection port closing body. Since the slip can be improved, the aluminum layer 5 is suppressed from being caught by the mold when the drawing is performed. As a result, division of the aluminum layer 5 by the mold can be suppressed.

(Resin layer containing lubricant)
The resin layer 8 containing a lubricant can use the same resin as the second resin layer 7 described above. The lubricant used for the resin layer 8 containing this lubricant is not particularly limited. However, considering good moldability, it is preferable that the lubricant contains an amide-based lubricant in the resin layer 8 containing the lubricant. The amide lubricant has an amide group. Examples of such amide lubricants include fatty acid amides, fatty acid ester amides and aromatic bisamides.

  Examples of fatty acid amides include saturated fatty acid amides, unsaturated fatty acid amides, substituted amides, methylolamides, saturated fatty acid bisamides, unsaturated fatty acid bisamides and the like. As fatty acid ester amides, stearoamidoethyl stearate and the like can be mentioned. Examples of the aromatic bisamide include m-xylylene bis stearic acid amide, m-xylylene bishydroxy stearic acid amide, N, N′-cysteallyl isophthalic acid amide and the like.

(Surface roughness of aluminum layer)
On the other hand, even when the static friction coefficient and the dynamic friction coefficient of the aluminum layer 5 are less than 0.3, the aluminum layer 5 is effectively suppressed from being caught by the mold when drawing.

(Adhesive layer)
Each layer constituting the raw material 1 for the spout closing body may be provided with an adhesive layer between the layers, and the layers may be bonded together with the adhesive layer. As the adhesive layer, an adhesive resin layer or an adhesive can be used.

  As an adhesive resin layer, adhesive resins, such as ethylene methacrylic acid, an ethylene methacrylic acid copolymer, an ethylene acrylic acid copolymer, an ionomer, an acid-modified polypropylene, can be used, for example. The thickness of the adhesive resin layer is preferably 20 μm or more and 50 μm or less. On the other hand, examples of adhesives include modified polyolefin resins, two-component curable urethane adhesives, polyester urethane adhesives, polyether urethane adhesives, acrylic adhesives, polyester adhesives, and polyamide adhesives. Agents, polyvinyl acetate adhesives, epoxy adhesives, rubber adhesives, and the like can be used.

[Manufacturing method of spout closure]
As shown in FIG. 3, the spout closing body 10 is formed by deep drawing a spout closing body raw fabric 1. Deep drawing is performed by the mold shown in FIG. The die includes a die 70 for receiving the outlet closure blank 1 and a crease restraining 71 for pressing the injection outlet closure blank 1 against the die 70 to prevent the occurrence of wrinkles; A punch 72 for pressing the material roll 1 toward the space portion of the die 70 is constituted. In deep-drawing, first, as shown in FIG. 3A, with the punch 72 raised to the upper side, the raw material 1 for outlet closure is set on the upper surface of the die 70, and the outlet closed. The body web 1 is pressed against the upper surface of the die 70 by the wrinkle restraint 71, and the spout closing body web 1 is fixed to the die 70. At that time, the raw material 1 for outlet cover closure is set so that the aluminum layer 5 is disposed on the upper side. Next, as shown in FIG. 3B, the raised punch 72 is lowered toward the hole formed in the die 70. With the lowering of the punch 72, the spout closing body original fabric 1 fixed to the upper surface of the die 70 is pushed into a hole formed in the die 70. Then, as shown in FIG. 3C, the punch 72 is further lowered to form a portion corresponding to the cylindrical portion 11 and a portion corresponding to the shoulder portion 25.

  In this embodiment, as described above, the resin layer 8 containing a lubricant is formed on the surface of the aluminum layer 5 of the raw material 1 for the spout closing body, or the static friction coefficient and the dynamic friction coefficient of the aluminum layer 5 are formed. Is processed below 0.3. Therefore, when the punch 72 is lowered and the spout closing member raw fabric 1 is pushed into the hole formed in the die 70, the surface of the spout closing member raw fabric 1 on the aluminum layer 5 side and the surface of the die 70. The friction generated during this time can be kept low. For this reason, when the punch 72 is lowered into the die 70 and the spout closing member 1 is pushed into the hole of the die 70, the spout closing member 1 is caught on the surface of the die 70. And deep drawing can be carried out smoothly.

  In the deep drawing process shown in FIG. 3, the deep drawing is performed in one step, but the deep drawing may be performed in a plurality of times. When the drawing is performed by dividing into a plurality of processes, the diameter of the cylindrical portion 11 can be reduced and the height of the cylindrical portion 11 can be increased.

[Pouring unit]
The pouring unit 20 is an upper part of the completed tube container 100 and is a component for pouring the contents to the outside. As shown in FIG. 4, the pouring unit 20 includes a combination of an oral head 21 that forms an outer shell and a spout closing body 10 that is disposed inside the thing of the oral head 21. The inside of the oral head 21 is hollow, and is configured so that the spout closing body 10 described above can be disposed. As shown in FIG. 4, the oral head 21 includes an extraction portion 22 and a shoulder portion 25 that protrudes outward from the extraction portion 22 in the radial direction. The extraction | pouring part 22 has comprised the cylinder shape, and is comprised by the surrounding surface part 22a and the top | upper surface part 22b. At the center of the top surface portion 22b, a spout 24 that communicates the inside and the outside of the spout unit 20 is formed. Further, the shoulder portion 25 has a truncated cone shape, and projects from the lower end portion of the pouring portion 22 toward the outside in the radial direction. In addition, the shoulder part 25 can also be formed in disk shape. The inner shape of the oral portion 21 corresponds to the shape of the spout closure 10 described above.

  The spout closure 10 is fitted inside the oral part 21 and integrated with the oral part 21. The tubular portion 11 of the spout closing body 10 is fitted inside the pouring portion 22 of the oral head 21 without a gap, and the shoulder portion 25 of the spout closing body 10 is placed inside the shoulder portion 25 of the oral head 21. Close contact without gaps. The spout 24 formed on the top surface portion 22b of the spout portion 22 constituting the head 21 is inserted into the top of the spout closure 10 by the top surface portion 13 of the spout closure 10 by inserting the spout closure 10 into the inside of the head 21. Closed.

  In the example of the pouring unit 20 shown in FIG. 4, the cap 30 is detachably provided to the pouring portion 22 constituting the oral portion 21 of the pouring unit 20. In the pouring unit 20, a spiral male screw 23 is formed on the circumferential surface 22a of the pouring portion 22, and a female screw is formed on the inner circumferential surface of the cap 30. In this pouring unit 20, the male screw 23 of the pouring portion 22 and the female screw of the cap 30 are engaged with each other, and the cap 30 is rotated with respect to the pouring portion 22, thereby opening and closing the pouring portion 22 with the cap 30. ing.

  It is preferable that the width of the shoulder portion 25 of the dispensing unit 20 is such that the dispensing unit 20 can be easily fused in a state where it is inserted into the open one end 40a of the body portion 40 of the tube container 100 described later. As the width of the shoulder portion 25, the length L1 connecting the farthest points of the shoulder portion 25 is smaller than the dimension of the open end 40a of the body portion 40, specifically, a range of 100 μm or more and 1000 μm or less. It is preferable that it is small within.

  The shape of the shoulder 25 in the oral part 21 of the pouring unit 20 is not particularly limited. For example, the shape of the shoulder portion 25 includes a circular shape or a substantially circular shape shown in FIG. 5A, or an elliptical shape or a substantially elliptical shape shown in FIG. Can do. Further, the shoulder 25 of the oral portion 21 may be a polygon shown in FIG. 5 (C) or a hexagon shown in FIG. 5 (D).

  The oral part 21 which comprises the pouring unit 20 can be manufactured by the injection molding method, the extrusion molding method, the pressure forming method, the draw molding method, the compression molding method, the insert molding method, for example.

[Tube container]
As shown in FIG. 6, the tube container 100 includes a barrel portion 40 for containing contents, the above-described dispensing unit 20 provided on one end side in the axial direction of the barrel portion 40, and the barrel portion 40. And a bottom cap 50 closing the other end in the axial direction.

<Body>
The trunk | drum 40 has comprised the cylinder shape. There is no particular limitation on the manufacturing method as long as the body portion 40 has a cylindrical shape. For example, it is formed by winding the laminated film 60 in a cylindrical shape, overlapping the edges of the laminated film 60 by a certain width, and sealing the overlapped portions.

  The peripheral edge of the shoulder 25 of the pouring unit 20 is fused to one axial end 40 a of the body 40 (upper end in FIG. 6). Various methods can be used as a method of fusing the one end 40a in the axial direction of the body portion 40 to the shoulder portion 25 of the dispensing unit 20. For example, the axial direction end 40a of the trunk | drum 40 is inserted in the shoulder part 25 which comprises the extraction | pouring unit 20, and the method of fuse | melting the inner surface of the trunk | drum 40 and the outer peripheral surface 24a of the shoulder part 25 can be mentioned. .

  The seal portion 41 is a portion where the side edges 15a and 15b on both sides of the rectangular laminated film 60 are overlapped and the overlapped side edges 15a and 15b are fused. Specifically, the seal portion 41 includes a region from one side in the left-right direction of the rectangular laminated film 60 to a position having a length L2, and a region from the other side in the left-right direction to a region having a length L2. And the area of. The stacking is performed such that one side 15c of the side edge 15a on one side of the laminated film 60 is aligned with the other side 15d of the side edge 15b on the other side of the laminated film 60. The “side edge” is a region between the side portion of the laminated film 60 and a position inside the side portion by a certain length L2 and is overlapped when the body portion 40 is formed. It is a part to be.

  The seal portion 41 is formed by heat sealing the overlapped portion. Examples of the heat seal include a bar seal, a rotary roll seal, a belt seal, an impulse seal, a high frequency seal, and an ultrasonic seal.

<Laminated film>
As shown in FIG. 7, the laminated film 60 has at least an innermost layer 61, an intermediate layer 62, and an outermost layer 63. The innermost layer 61 is a layer that is located on the inner surface side of the trunk portion 40 and contacts the contents, and the outermost layer 63 is a layer that constitutes the outermost surface side of the trunk portion 40. Another layer may be provided between the innermost layer 61 and the intermediate layer 62 or between the intermediate layer 62 and the outermost layer 63.

(Innermost layer and outermost layer)
The innermost layer 61 and the outermost layer 63 are made of a non-adsorptive resin. As the non-adsorptive resin, the same material as that constituting the non-adsorptive layer of the spout closing member 10 described above is used. The innermost layer 61 and the outermost layer 63 are usually configured without containing any resin other than the non-adsorptive resin, but may be configured by slightly containing other resins within a range not impairing the non-adsorptive property. . Examples of the resin to be contained include a low-density polyethylene (hereinafter referred to as “LDPE”) and a linear low-density polyethylene (hereinafter referred to as “L-LDPE”) for the purpose of improving fusibility and flexibility. And the like.

  The thickness of the innermost layer 61 is not less than 5 μm and not more than 300 μm, preferably not less than 10 μm and not more than 100 μm. By setting the thickness of the innermost layer 61 within this range, it is possible to provide non-adsorptivity to the contents of the tube container 100. The thickness of the outermost layer 63 is also 5 μm or more and 300 μm or less, and preferably 10 μm or more and 100 μm or less. By setting the outermost layer 63 to a thickness in this range, it is possible to increase the non-adsorption property to substances outside the tube container 100.

(Intermediate layer)
The intermediate layer 62 is a layer located between the innermost layer 61 and the outermost layer 63, is configured of at least one layer, and may be two or more layers. At least one layer constituting the intermediate layer 62 is a gas barrier layer. When the intermediate layer 62 has at least the gas barrier layer, it is possible to suppress a gas such as oxygen from passing through the laminated film 60. As such a gas barrier layer, the following can be mentioned, for example. (1) Metal foil with gas barrier properties. (2) A gas barrier film in which a metal such as aluminum having a gas barrier property or an inorganic oxide is vapor-deposited on a polyester film or a nylon film. (3) A gas barrier resin layer such as ethylene-vinyl alcohol copolymer (EVOH) or vinylidene chloride.

  As the metal foil having gas barrier properties, various metal foils conventionally used as gas barrier metals can be used. Aluminum foil etc. can be mentioned as a typical metal foil.

  Alternatively, a gas barrier film in which a metal such as aluminum having a gas barrier property or an inorganic oxide is vapor-deposited on a polyester film or a nylon film may be used. Examples of the inorganic compound include gas barrier metal oxides such as silica (silicon oxide) and alumina (aluminum oxide).

In addition, gas barrier resins which are conventionally used can be applied. For example, ethylene-vinyl alcohol copolymer (EVOH), polyvinyl alcohol, polyamide resin, polyvinylidene chloride (PVDC), fluorine resin, and the like can be given. The gas barrier layer may be a polyvinyl alcohol coating film or a polyvinylidene chloride (PVDC) coating film. As the polyamide resin, for example, nylon 6, nylon 66, nylon 6/66 copolymer, nylon 610, nylon 11, nylon 12, nylon 13 or the like can be used. In addition, nylon MXD6 (a polyamide resin manufactured by Mitsubishi Gas Chemical Co., Ltd., which is called MX nylon) made of metaxylylene diamine and adipic acid may be used.
As such an intermediate layer 62, the gas barrier layer of each aspect described above may be used alone, or two or more kinds thereof may be used in combination.

  The thickness of the intermediate layer 62 is 3 μm or more and 200 μm or less, preferably 5 μm or more and 60 μm or less. By setting the thickness of the intermediate layer 62 in this range, good gas barrier properties can be imparted.

(Other layers)
The laminated film 60 may further be provided with a flexible layer, although not particularly shown in the drawings. The flexible layer is a layer having the function of improving the flexibility of the laminated film 60, and is a polyolefin resin layer such as polypropylene (PP) or polyethylene (PE), or a thermoplastic elastomer resin layer such as an olefin elastomer or a styrene elastomer. Or the adhesive resin layer etc. which consist of polyolefin which has adhesiveness can be mentioned. As polyolefin which has adhesiveness, Mitsui Chemicals Admer (trademark) and Mitsubishi Chemical Modic (trademark) can be mentioned, for example. The thickness of the soft layer is 10 μm or more and 300 μm or less, preferably 15 μm or more and 150 μm or less. The flexible layer can also be used as an adhesive layer such as an adhesion between the innermost layer 61 and the intermediate layer 62 and an adhesion between the intermediate layer 62 and the outermost layer 63.

  The laminated film 60 can also be provided with a reinforcing layer. The reinforcing layer is a layer having an effect of complementing the strength characteristics of the laminated film 60, and is a polyolefin resin layer such as polypropylene (PP) or polyethylene (PE), biaxially stretched polyethylene terephthalate (O-PET), biaxial. Examples of the resin layer include stretched nylon (O—Ny) and biaxially stretched polypropylene (OPP). The thickness of the reinforcing layer is 3 μm or more and 500 μm or less, preferably 5 μm or more and 300 μm or less.

  The method for producing such a laminated film 60 is not particularly limited, and an extrusion lamination method, a dry lamination method, a coextrusion method, or a method of using these in combination can be mentioned. When the laminated film 60 is produced by these production methods, a functional layer having a predetermined function can be easily provided on the innermost layer 61 of the laminated film 60. Examples of the predetermined function include heat resistance, chemical resistance, non-adsorption, low elution, and fragrance retention.

<Bottom cap>
The bottom cap 50 is a component for closing the lower portion of the tube container 100. The bottom cap 50 is made of resin or the like. The bottom cap 50 is configured of a bottom surface 52 forming a lower surface and a circumferential surface 51 forming a periphery. Also in regard to the bottom cap 50, the dimension between the farthest portions is smaller than the dimension of the open end 40a of the barrel 40 so that the bottom cap 50 can be easily fused to the other end 40b of the barrel 40. In particular, it is preferable to be small within the range of 100 μm to 1000 μm. In addition, you may form a bottom part by crushing the other end 40b of the trunk | drum 40, without using the bottom face cap 50. FIG.

<Contents>
The contents of the tube container 100 are not particularly limited. Examples of the contents of the tube container 100 include foods and drinks, cosmetics, drugs, and the like containing fragrances and active ingredients that are low molecular weight organic compounds. Since this tube container 100 is excellent in non-adsorbability, the low molecular weight organic compound contained in the contents is adsorbed by the tube container 100, and the flavor of the contents is changed or the efficacy is lowered. Can be suppressed.

  Hereinafter, the present invention will be described in more detail by way of examples and comparative examples. Raw material 1 for outlet-closing bodies in Examples 1 to 6 below and Raw material 1 for outlet-closing bodies in Comparative Examples 1 to 3 are formed by laminating aluminum layer 5 and first resin layer 6. It is a film material. The laminated film of each example and the laminated film of each comparative example were formed by laminating using a dry laminating method. The layer configuration of the raw material 1 for outlet-closing bodies of Examples 1 to 6 and the layer configuration of the raw material 1 for outlet-closing bodies of Comparative Examples 1 to 3 are shown in Table 1 respectively.

Example 1
In Example 1, the aluminum layer 5 is formed of an aluminum foil having a thickness of 50 μm. The aluminum purity of the aluminum foil is 98.0% by mass, and the balance is an unavoidable impurity. The balance contains 0.05% by mass of manganese, 0.15% by mass of silicon, and 0.05% by mass of copper. The first resin layer 6 is formed of polylactic acid (PLA) having a thickness of 24 μm. As polylactic acid, Ecologe (registered trademark) manufactured by Mitsubishi Plastics, Inc. is used.

Example 2
In Example 2, the aluminum layer 5 is the same as that in Example 1. The first resin layer 6 is polyethylene terephthalate (PET) having a thickness of 12 μm. As polyethylene terephthalate, E5202 type manufactured by Toyobo Co., Ltd. is used.

[Example 3]
In Example 3, the aluminum layer 5 is the same as in Example 1. The first resin layer 6 is nylon (Ny) having a thickness of 15 μm. As nylon, an Emblem (registered trademark) ONMB type manufactured by Unitika Ltd. is used.

Example 4
In Example 4, the aluminum layer 5 is formed of an aluminum foil having a thickness of 80 μm. The aluminum purity of the aluminum foil is 99.0% by mass, and the balance is an unavoidable impurity. The balance contains 0.01% by mass of manganese, 0.12% by mass of silicon, and 0.05% by mass of copper. The first resin layer 6 is the same as that of the first embodiment.

[Example 5]
In Example 5, the aluminum layer 5 is the same as in Example 4. The first resin layer 6 is the same as that of the second embodiment.

[Example 6]
In the sixth embodiment, the aluminum layer 5 is the same as the fourth embodiment. The first resin layer 6 is the same as that in the third embodiment.

Comparative Example 1
In Comparative Example 1, the aluminum layer 5 is formed of an aluminum foil having a thickness of 40 μm. The aluminum purity of the aluminum foil is 95.7% by mass, and the balance is an unavoidable impurity. The balance contains 1.5% by mass of manganese, 0.3% by mass of silicon, and 0.25% by mass of copper. The first resin layer 6 is the same as in Example 3.

Comparative Example 2
In Comparative Example 2, the aluminum layer 5 is formed of an aluminum foil having a thickness of 20 μm. The aluminum purity of the aluminum foil is 99.0% by mass, and the balance is an unavoidable impurity. The balance contains 0.05% by mass of manganese, 0.7% by mass of silicon, and 0.1% by mass of copper. The first resin layer 6 is the same as in Example 2.

Comparative Example 3
In Comparative Example 3, the aluminum layer 5 is the same as Comparative Example 1 except that the thickness is 70 μm. The first resin layer 6 is the same as that in the second embodiment.

[Contents and results of appearance inspection]
The laminated films of Examples 1 to 6 and Comparative Examples 1 to 3 were molded, and the appearance of whether or not wrinkles and tears occurred in the molded film was observed. In the evaluation, when there is no generation of wrinkles or breakage after molding and the shape is stable, it is evaluated as “○”, and after generation of wrinkles or breakage occurs, the shape is “stable”. × ”. The test results of Examples 1 to 6 and Comparative Examples 1 to 3 are shown in Table 1.

  As shown in Table 1, the results of the appearance inspections of Examples 1 to 6 were both free of wrinkles and tears after molding, the shape was stable, and both were evaluated as “◯”. I was able to. On the other hand, after shaping | molding, a wrinkle or a tear generate | occur | produces the result of the external appearance test of Comparative Examples 1-3, and the shape is unstable, and all were evaluation of "x". As is clear from this result, the laminated film has excellent formability by using an aluminum foil having a thickness of 50 μm or more and having an aluminum purity of 98.0% or more.

DESCRIPTION OF SYMBOLS 1 Raw material for injection-outlet closing body 5 Aluminum layer 6 1st resin layer 7 2nd resin layer 10 Injection-outlet closing body 11 Tubular part 12 circumferential surface part 13 top surface part 14 Thin thickness part 15 Overhanging part 20 Unit 21 verbal part 22 spout 22a circumferential surface 22b top surface 23 male screw 24 spout 25 shoulder 30 cap 40 body 40a one end of body 40b the other end of body 41 seal 50 bottom cap 51 circumference 52 bottom 60 Laminated film 61 Inner layer 62 Intermediate layer 63 Outer layer 70 Dies 71 Wrinkle control 72 Punch 100 Tube container (closed container)

Claims (11)

Located inside the oral portion of the outer shell of the pouring unit constituting the closed container, said oral portion having a pouring portion and a shoulder projecting radially outward from the pouring portion; A closure for closing a spout formed in the spout,
It is composed of a cylindrical part arranged inside the pouring part and an overhang part arranged inside the shoulder part,
The cylindrical portion and the overhang portion are
A drawable aluminum layer;
A first resin layer provided on at least one side of the aluminum layer;
A spout closing body characterized by comprising:   The spout closure body according to claim 1, wherein a second resin layer is provided on a surface of the first resin layer opposite to the aluminum layer.   The spout closure body according to claim 1, wherein the first resin layer is a polyamide resin layer, a polyester resin layer, or a polyolefin resin layer.   The spout closure body according to claim 2, wherein the second resin layer is a polyester resin layer or a cyclic polyolefin resin layer.   The pouring port according to any one of claims 1 to 4, wherein the thickness of the aluminum layer is in the range of 50 μm to 200 μm, and the purity of the aluminum constituting the aluminum layer is 98.0% or more. Closed body.   The adhesive layer is provided between the aluminum layer and the first resin layer and / or between the first resin layer and the second resin layer. The spout closure according to any one of the preceding claims.   The resin layer containing a lubricant is provided on the surface of the aluminum layer, or the static friction coefficient and the dynamic friction coefficient of the aluminum layer are less than 0.3, according to any one of claims 1 to 6. Outlet closure body.   The closed container according to any one of claims 1 to 7, wherein at least an outer surface of the cylindrical portion and the protruding portion is formed as a smooth surface without wrinkles. Outlet closure body.   The thickness of the portion closing the spout in the cylindrical portion is the thickness of the area outside the portion closing the spout in the cylindrical portion and the thickness of the circumferential surface portion forming the circumferential surface of the cylindrical portion 9. The spout closure of a closed container according to any of the preceding claims, wherein the closure is also thin. Located inside the oral portion of the outer shell of the pouring unit constituting the closed container, said oral portion having a pouring portion and a shoulder projecting radially outward from the pouring portion; A method of manufacturing a spout closure for closing a spout formed in the spout portion, the method comprising:
As the spout closing body, a raw material for a spout closing body having a drawable aluminum layer and a first resin layer provided on at least one surface of the aluminum layer is used.
The thickness of the aluminum layer is in the range of 50 μm or more and 200 μm or less, and the purity of the aluminum constituting the aluminum layer is 98.0% or more,
A resin layer containing a lubricant is provided on the surface of the aluminum layer, or the static friction coefficient and the dynamic friction coefficient of the aluminum layer are less than 0.3, and the raw material for the outlet closing body is drawn.
A manufacturing method of a spout closure body characterized by the above. The spout closing body according to claim 10, wherein the raw material for a spout closing body in which a second resin layer is provided on a surface of the first resin layer opposite to the aluminum layer is drawn. Manufacturing method.

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