JP2012162283A - Tube container and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tube container allowing the content to be extracted without being left while maintaining the strength of a shoulder part appropriately.SOLUTION: The tube container 1 includes a tube body 2 serving as a storage part for storing the content, and an extraction body 4 provided at one end of the tube body 2. The tube body 2 includes a body part 10 with one end side formed in cylindrical shape, and the shoulder part 20 provided between the body part 10 and the extraction body 4. The extraction body 4 has an outer diameter smaller than the outer peripheral edge diameter of the shoulder part 20, and its base end is connected to the shoulder part 20. The shoulder part 20 is formed by providing an extension part extended from the body part 10, with a plurality of mountain fold parts and valley fold parts alternately formed in the circumferential direction of the body part 10 to extend from the extension end toward the body part 10, to form unit bent parts each of which is formed with the mountain fold part and the adjacent valley fold parts with the mountain fold part held in between, and overlapping and bonding the optional unit bent part to the other optional unit bent part adjacent to the optional unit bent part.

Description

  The present invention relates to a tube container and a manufacturing method thereof.

  A tube container having a spout formed at one end of a flexible tube and a flat sealed seal at the other end is used for paste-like toothpaste, food, cosmetics and pharmaceuticals. It is frequently used as a container for fluid contents such as adhesives. This tube container can easily pour out the contents from the spout by pressing the container.

  In general, a tube container has a cylindrical laminate film in which an innermost layer and an outermost layer are made of a heat-welding film such as polyethylene, and a neck and neck provided with a spout at one end of the cylindrical laminate film. And a pouring body comprising a shoulder and a shoulder extending from the mouth and neck.

An example of such a tube container is a tube container 900 shown in FIG. The tube container 900 includes a tube main body 902 and an extraction body 904 provided at one end of the tube main body 902.
The extraction body 904 has a substantially cylindrical shape in which a screw portion that is screwed with a lid body (not shown) is formed on the outer peripheral surface, and is integrated with a shoulder portion 920 that extends outward from the base end thereof. It is molded. The tube main body 902 includes a substantially cylindrical body portion 910 made of a laminate film and a shoulder portion 920 connected to one end of the body portion 910, and the inside is a storage portion that stores contents.
In such a tube container 900, a high sealing property for preventing leakage of contents is required at the joint portion 906 between the body portion 910 and the shoulder portion 920.
For example, Patent Document 1 discloses a squeeze tube in which a tongue-shaped piece formed by cutting one end of a cylindrical bag body into a sawtooth shape is attached to the outer surface of a mouth piece.
In Patent Document 2, one end of the body portion is extended to provide an extension portion, and this extension portion is divided into a plurality of flaps by notches formed at an appropriate pitch in the circumferential direction. A tube container embedded in a resin constituting the part is disclosed.

By the way, the shoulder portion 920 of the tube container 900 is made of a material that is not easily crushed in order to prevent deformation due to opening / closing of the lid body and deformation due to an impact during distribution / storage. For this reason, there was a problem that the contents remaining inside the shoulder portion 920 could not be easily poured out.
To solve these problems, the polygonal panel that extends horizontally or inclined from the lower side of the mouth, the polygonal panel and the base are the same, the triangular panel with the vertex pointing downward, and the triangular panel with the vertex pointing downward A plurality of panel sections formed between the sections, each having a triangular panel section having an upward apex, and a downward facing tongue-shaped or polygonal panel section having a common base and the triangular panel section having an apex facing upward A tube container having a panel portion formed on a shoulder portion has been proposed (for example, Patent Document 3). According to the invention of Patent Document 3, since the tube container can be easily crushed with fingers according to the connection portion of each panel, it is possible to pour out all the contents.

Japanese Utility Model Publication No. 11-3804 Japanese Utility Model Publication No. 61-103336 Japanese Patent No. 3823217

However, although the invention of Patent Document 3 can pour out the contents with a small remaining amount, the method of forming each panel is limited to blow molding. For this reason, it is difficult to apply the invention of Patent Document 3 to a laminate film having a metal layer or the like for the purpose of enhancing gas barrier properties and light shielding properties. On the other hand, if the shoulder portion is simply made of a material that can be easily crushed with fingers, the shoulder portion is easily crushed when the lid is opened and closed, which makes the opening and closing of the lid complicated.
That is, when adopting a laminate film for the tube body, it is difficult to form a shoulder portion having an appropriate strength and easy crushing.
Then, this invention aims at the tube container which can be poured out without leaving the contents, maintaining the intensity | strength of a shoulder part appropriately.

The tube container of the present invention comprises a tube main body formed of a cylindrical laminate film, the inside of which is a storage unit for storing contents, and a pouring body provided at one end of the tube main body, The tube main body has a barrel portion whose one end side is formed in a cylindrical shape, and a shoulder portion which is provided between the barrel portion and the extraction body and gradually decreases in diameter from the trunk portion toward the extraction body. The tube has an outer diameter smaller than that of the outer peripheral edge of the shoulder, and the shoulder extends from the trunk in a tube container having a proximal end connected to the shoulder. A plurality of mountain folds and valley folds extending from the extension end toward the body part are alternately formed in the circumferential direction of the body part and adjacent to the mountain fold part and the mountain fold part. A unit fold is formed by the valley fold, and an arbitrary unit fold and the arbitrary unit are formed. Overlapped and any other unit bent portion adjacent to the bent portion, bonded, and characterized in that formed.
The laminate film is provided with a barrier layer, and on the shoulder portion, the multilayer portion of the barrier layer in the overlapping portion of the unit bent portion is annularly arranged around the axis of the extraction body. preferable.

The method for manufacturing a tube container according to the present invention includes forming a plurality of mountain folds and valley folds starting from one opening end of a cylindrical laminate film alternately in the circumferential direction of the laminate film, and A folded portion forming step of forming unit folded portions at the valley folded portions adjacent to each other and the mountain folded portion, and the unit folded portions are overlapped and bonded together, and the one opening end is shrunk, And a pouring body attaching step of providing a pouring body at the recessed opening end.
It is preferable that the said bending body attachment process adhere | attaches the said unit bending parts by heat welding.

According to the present invention, the tube main body is provided between the barrel portion having the one end side formed in a cylindrical shape and the barrel portion and the extraction body, and gradually contracts from the trunk portion toward the extraction body. A tube container in which an outer diameter is smaller than a diameter of an outer peripheral edge of the shoulder portion, and a proximal end is connected to the shoulder portion. A plurality of mountain folds and valley folds extending from the extended end toward the trunk are formed alternately in the circumferential direction of the trunk, and the mountain folds and the mountain folds are formed in the extension extended from the trunk. A unit fold is formed by the valley folds adjacent to each other, and an arbitrary unit fold is overlapped with another arbitrary unit fold adjacent to the arbitrary unit fold. Since it is formed, it can be poured without leaving the contents while maintaining the strength of the shoulder appropriately.
According to the present invention, the laminate film is provided with a barrier layer, and on the shoulder portion, the multilayer portion of the barrier layer in the overlapping portion of the unit bent portion is annular around the axis of the extraction body. Since it is arranged, the strength of the shoulder can be improved.

According to the present invention, a plurality of mountain folds and valley folds starting from one open end of the cylindrical laminate film are alternately formed in the circumferential direction of the laminate film, and the mountain folds and the mountain folds are formed. A bent portion forming step of forming a unit bent portion at the valley fold portion adjacent to each other across the portion, and the unit bent portions are overlapped and bonded to each other, and the one open end is shrunk, and the shrunk open end Therefore, it is possible to easily obtain a tube container that can be poured out without leaving the contents while appropriately maintaining the strength of the shoulder.
According to this invention, since the said extraction body attachment process adhere | attaches the said unit bending parts by heat welding, it can form a shoulder part easily and attractively.

(A) It is a perspective view of the tube container concerning one Embodiment of this invention. (B) It is a fragmentary sectional view of Drawing 1 (a). (C) It is a fragmentary sectional view of Drawing 1 (a). It is sectional drawing of the tube container concerning one Embodiment of this invention. It is a section perspective view of the tube container concerning one embodiment of the present invention. It is process drawing of the tube container concerning one Embodiment of this invention. It is process drawing of the tube container concerning one Embodiment of this invention. It is process drawing of the tube container concerning one Embodiment of this invention. It is VII-VII sectional drawing of FIG. It is a perspective view of the tube container concerning one Embodiment of this invention. It is process drawing of the tube container concerning one Embodiment of this invention. It is a perspective view of the tube container concerning one Embodiment of this invention. It is a perspective view of the tube container concerning one Embodiment of this invention. It is a perspective view of the tube container concerning one Embodiment of this invention. It is sectional drawing of the conventional tube container. It is a perspective view of the conventional tube container.

  A tube container according to an embodiment of the present invention will be described below with reference to the drawings. 1A is a perspective view of the tube container 1 of the present embodiment, FIG. 1B is a cross-sectional view taken along the line BB in FIG. 1A, and FIG. 1C is a cross-sectional view taken along the line C- in FIG. It is C sectional drawing. 2 is a longitudinal sectional view of the tube container 1, and FIG. 3 is a perspective view of the tube container 1 of FIG. 2 as viewed from the inside.

  A tube container 1 shown in FIG. 1A is formed of a substantially cylindrical laminate film, and a tube main body 2 for storing contents therein, and a pouring body 4 provided at one end of the tube main body 2. Is provided.

 As shown in FIG. 1A and FIGS. 2 to 3, the extraction body 4 includes a substantially cylindrical mouth-neck part 40 and a diameter-expanded part 41 extending from the mouth-neck part 40. . On the outer peripheral surface of the mouth-and-neck portion 40, a screw portion 42 that is screwed with a lid (not shown) is formed. It is made into the shape which expands gradually toward this.

 The tube main body 2 includes a body portion 10 having one end that is substantially cylindrical, and a shoulder portion 20 that gradually decreases in diameter from the one end toward the inside of the body portion 10. A shoulder opening 21 is formed at the tip of the shoulder 20, and the extraction body 4 is provided in the shoulder opening 21. The extraction body 4 is connected to the shoulder portion 20 such that the enlarged diameter portion 41 is in contact with the inner surface of the shoulder portion 40 at the peripheral edge portion of the shoulder opening portion 21 and the mouth neck portion 40 protrudes from the shoulder opening portion 21. Has been. In the present embodiment, the shoulder 20 has a substantially smooth surface (outer surface) and a substantially uniform thickness, and gradually decreases in diameter from the boundary 6 between the shoulder 20 and the body 10 toward the shoulder opening 21. It has a dome shape. Note that “the surface is substantially smooth” means that there are no visible irregularities, and “the thickness is substantially uniform” means that the change in thickness is ± 10% or less.

 As shown in FIG. 1B, the body portion 10 of the present embodiment includes a barrier layer 52, a first resin layer 50 provided on one surface of the barrier layer 52, and the other surface of the barrier layer 52. It consists of a laminated film provided with the 2nd resin layer 54 provided in this.

 As shown in FIGS. 1 (a), (c), and FIG. 3, the shoulder portion 20 is formed with a multilayer portion 22 in which the barrier layer 52 overlaps at least in triple, and this multilayer portion 22 is the axis of the extraction body 4. Annularly arranged around O1.

The structure of the shoulder 20 will be described below with reference to FIGS.
As a manufacturing method of the tube container 1, what is equipped with a bending part formation process and the extraction body attachment process is mentioned, for example.

The bent portion forming step is a step of forming a unit bent portion at one opening end (film opening end) side of the cylindrical laminate film at a mountain folded portion and a valley folded portion adjacent to the mountain folded portion. .
First, as shown in FIG. 4, a cylindrical laminate film 60 is prepared. The laminate film 60 is such that the film opening end 13 is a surface substantially orthogonal to the axis O2 of the laminate film 60.
Next, a mountain fold line 14 a and a valley fold line 16 a extending in the same direction as the axis line O 2 of the laminate film 60, that is, the axis line of the trunk portion 10 are alternately formed from the film opening end 13 around the axis line O 2 at substantially equal intervals. In this manner, the laminate film 60 is formed with the substantially cylindrical body portion 10 and the extension portion 12 extending from the body portion 10 and having the mountain fold line 14a and the valley fold line 16a formed therein.

The valley fold line 16a is a straight line substantially parallel to the axis O2, and the mountain fold line 14a is a straight line that approaches the valley fold line 16a located in an arbitrary direction around the axis O2 as it goes from the opening end 13 to the trunk portion 10. Yes. That is, the mountain fold line 14a intersects with the direction of the axis O2. In the present embodiment, eight mountain fold lines 14 a and eight valley fold lines 16 a are alternately formed on the laminate film 60.
The length of the mountain fold line 14a is not particularly limited, and can be appropriately determined in consideration of the inner diameter of the laminate film 60, the size of the shoulder opening 21 (FIG. 1A), and the like.
The length of the valley fold portion 16a can be appropriately determined according to the length of the mountain fold portion 14a.

 Next, as shown in FIG. 5, the laminate film 60 is bent according to each mountain fold line 14 a to form the mountain fold part 14, and the laminate film 60 is bent according to each valley fold line 16 a to form the valley fold part 16. Form. Thus, the unit folding part 18 is formed by the mountain folding part 14 and the valley folding part 16 adjacent to the mountain folding part 14.

The extraction body attaching step is a step of forming the shoulder portion 20 in which the diameter of the extension portion 12 is reduced and connecting the extraction body 4 to the shoulder portion 20.
First, as shown in FIGS. 6 to 7, the mountain fold portion 14 in an arbitrary unit bent portion 18 is bent and extended so as to abut on another unit bent portion 18 adjacent to the arbitrary unit bent portion 18. The reduced diameter portion 20a is formed by reducing the opening diameter of the portion 12, that is, the opening diameter of the film opening end 13 (FIG. 4). At this time, the reduced diameter portion 20a is formed with an overlapping portion 22a where adjacent unit bent portions 18 overlap each other, and a reduced diameter portion opening portion 21a is formed at the tip. In this way, the temporary main body 2a provided with the trunk | drum 10 and the reduced diameter part 20a is obtained.
From the inside of the reduced diameter portion 20a, the mouth neck portion 40 is inserted into the reduced diameter portion opening portion 21a, and the enlarged diameter portion 41 is brought into contact with the peripheral edge portion of the reduced diameter portion opening portion 21a. 4 is provided (the assembly operation).

 Next, the reduced diameter portion 20a is sandwiched and pressed with a mold having an arbitrary shape, the reduced diameter portion 20a is heated at an arbitrary temperature, and the unit bent portions 18 are thermally welded together. The enlarged diameter part 41 is heat-welded (thermal welding operation). The heating temperature in the heat welding operation can be determined in consideration of the materials of the first resin layer 50, the second resin layer 54, and the barrier layer 52. For example, the heating temperature of the first resin layer 50 and the second resin layer 54 can be determined. The temperature is equal to or higher than the melting point and lower than the melting point of the barrier layer 52. By heat welding at such a temperature, the surface of the shoulder portion 30 can be finished to a substantially smooth surface, and the multilayer portion 22 can be easily formed.

Each unit bent portion 18 is a laminate film in which a barrier layer 52 is provided between a first resin layer 50 and a second resin layer 54, as in the case of the body portion 10 shown in FIG. It is configured. When the unit bent portions 18 are heat-welded, the first resin layer 50 and the second resin layer 54 in the overlapping portion 22a are melted. Then, as shown in FIG. 1C, the first resin layer 50a and the second resin layer 54a in which the first resin layer 50 and the second resin layer 54 are welded are formed. In addition, the multilayer portion 22 in which the barrier layers 52 overlap each other and the first resin layer 50a or the second resin layer 54a is interposed between the overlapping barrier layers 52 is formed. The multilayer portion 22 extends from the shoulder opening 21 toward the boundary 6 and is annularly arranged around the axis O <b> 1 of the extraction body 4.
In this way, it is possible to obtain the tube container 1 in which the extraction body 4 is provided at one end of the tube body 2 and the other end (end of the body bottom side) of the tube body 2 is opened.

In addition, a bending part formation process and a extraction body attachment process can be performed using arbitrary metal mold | dies.
For example, a female mold having an inner surface shape corresponding to the mountain fold portion 14 and the valley fold portion 16 and a male mold having an outer surface shape corresponding to the inner surface shape are prepared. After disposing the laminate film 60 and the extraction body 4 in the female mold, the male mold is inserted into the laminate film 60 and heated. At this time, a molten resin may be allowed to flow between the female mold and the male mold, and the unit bent portions 18 or the unit bent portions 18 and the extraction body 4 may be bonded. Thus, the tube container 1 can be manufactured by performing the bent portion forming step, the assembling operation, and the heat welding operation in a series of processes.

For example, the dispenser 4 may be formed integrally with the enlarged diameter portion 41 using a resin such as a polyolefin such as polyethylene or polypropylene, or a polyester such as polyethylene terephthalate.
The outer diameter R1 of the extraction body 4, that is, the outer diameter R1 of the enlarged diameter portion 41 is smaller than the outer diameter of the shoulder portion 20, ie, the contour diameter (shoulder outer diameter) R2 of the boundary 6 (FIG. 2). For example, it is preferably 50% or less, more preferably 30% or less, and still more preferably 20% or less with respect to the shoulder outer diameter R2. If it is below the said upper limit, the softness | flexibility of the shoulder part 20 is ensured and it can pour out without leaving the contents more easily. The lower limit value is not particularly limited, and can be determined in consideration of the material of the laminate film constituting the unit bent portion 18, the material of the extraction body 4, and the like.

 The thickness of the laminate film 60 can be determined in consideration of the strength required for the tube body 2, and is preferably 250 to 400 μm, and more preferably 300 to 350 μm, for example. If it is less than the lower limit, the strength of the tube body 2 may be insufficient, and if it exceeds the upper limit, the trunk portion 10 becomes hard and it becomes difficult to pour the contents, or the shoulder portion 20 is crushed. May be difficult.

The material of the first resin layer 50 is not particularly limited as long as it can be thermally welded, and examples thereof include polyolefins such as polyethylene and polypropylene.
The thickness of the 1st resin layer 50 can be determined in consideration of a material etc., for example, is set to 50-150 micrometers.
The material of the second resin layer 54 is the same as the material of the first resin layer 50, and the thickness of the second resin layer 54 is the same as the thickness of the first resin layer 50.

Examples of the barrier layer 52 include metal foil such as aluminum foil, EVOH (ethylene vinyl alcohol), nylon (polyamide), silica or carbon vapor deposition film, metal vapor deposition film such as aluminum, and PAN (polyacrylonitrile). Among these, a metal foil or a metal vapor deposition film is preferable. This is because a metal layer using a metal foil or a metal vapor deposition film has excellent light shielding properties, is not easily deformed during a heat welding operation, and the multilayer portion 22 can be easily formed.
The thickness of the barrier layer 52 can be thoroughly considered in consideration of materials and the like, and is preferably 5 to 50 μm, and more preferably 10 to 30 μm, for example. If it is less than the lower limit, the strength of the tube body 2, particularly the shoulder 20 may be insufficient, and if it exceeds the upper limit, the body 10 becomes hard and it is difficult to pour the contents. It may be difficult to crush the shoulder 20.

Next, the usage method of the tube container 1 of this embodiment is demonstrated.
The lid is screwed onto the mouth / neck portion 40. Next, the tube main body 2 is filled with contents from an opening at the bottom end of the main body (hereinafter also referred to as a bottom side opening). The content may be any paste-like, gel-like, jelly-like, or cream-like fluidity such as toothpaste, shampoo, rinse, treatment, kneading seasoning, adhesive, putty, etc. It is done.

  After filling the contents, the bottom side opening is closed to form the bottom, and a tube container containing the contents is obtained. A method for closing the bottom opening is not particularly limited, and examples thereof include hot press bonding such as hot air, ultrasonic waves, and high frequencies.

 When the contents are poured out from the tube container containing the contents, the body part 10 is pressed after the lid body is screwed off from the mouth / neck part 40. When the body part 10 is pressed, the contents in the tube body 2 are poured out from the mouth / neck part 40. When the remaining amount of the contents in the tube main body 2 decreases, the contents cannot be poured out even if the trunk portion 10 is pressed. Then, the content which stayed in the shoulder part 20 is poured out by reducing the volume of the tube main body 2 so that the shoulder part 20 may be crushed (FIG. 8). At this time, it is possible to pour out without leaving the contents by crushing the shoulder with fingers.

As shown in FIG. 14, the shoulder portion 920 of the conventional tube container 900 is formed of a material that cannot be easily crushed by fingers. For this reason, there was a problem that the contents remained.
According to this embodiment, since the shoulder part is formed with the same laminate film as the trunk part, the shoulder part can be easily crushed with fingers and poured out without leaving the contents. In addition, a multi-layered portion in which a barrier layer is superimposed on the shoulder is formed radially around the axis of the extrudate, and this multi-layered portion becomes a skeleton of the shoulder, thereby making the strength of the shoulder more appropriate. For this reason, it is possible to further prevent the shoulder portion from being easily deformed or the shoulder portion from being deformed during distribution and storage by attaching and detaching the lid. In addition, since the barrier layer has a single region between the multilayer portions, the shoulder portion can be easily crushed with fingers and the content can be poured out without leaving the contents.

  According to the present embodiment, a mountain fold and a valley fold extending from the opening end of the cylindrical laminate film toward the trunk are formed to form a unit fold, and the unit fold is overlapped and bonded. Thus, a shoulder portion made of a laminate film can be easily formed.

The present invention is not limited to the above-described embodiment.
In the above-described embodiment, the tube main body is configured by a laminate film including a barrier layer. However, the present invention is not limited thereto, and the tube main body may be configured by a laminate film not including a barrier layer.

 In the above-described embodiment, the film opening end is a surface substantially orthogonal to the axis of the cylindrical laminate film, but the present invention is not limited to this. For example, like the laminated film 160 shown in FIG. 9, the film opening end 113 has a zigzag shape in which the start end 124 of the mountain fold portion 114a is a top portion and the start end 126 of the valley fold portion 116a is recessed toward the body portion 10 side. Also good.

  In the above-described embodiment, the valley fold line is a straight line substantially parallel to the axis of the trunk, and the mountain fold line is a straight line that intersects the axis of the trunk. For example, the mountain fold line is substantially parallel to the axis of the trunk. The valley fold line may cross the axis of the trunk.

 In the above-described embodiment, eight unit bent portions are formed in the bent portion forming step. However, the present invention is not limited to this, and the number of unit bent portions may be 2 to 7. 9 or more. However, if the number of unit bent portions is too small, it is difficult to form the shoulder portion and the strength of the shoulder portion may be reduced. Therefore, it is preferable that the number of unit bent portions is three or more.

For example, FIG. 10 shows an example of a tube container in which three unit bent portions are formed, and the unit bent portions are stacked and bonded to form a shoulder portion. A tube container 200 shown in FIG. 10 includes a tube main body 202 and an extraction body 4 provided at one end of the tube main body 202. The tube main body 202 includes a substantially triangular tubular body 210 and a shoulder 220 formed between the body 210 and the extraction body 4.
The contour of the outer peripheral edge of the shoulder 220, that is, the contour of the boundary 206 between the shoulder 220 and the body 210 is substantially triangular, and the three overlapping portions 222 are arranged around the axis of the extraction body 4 on the shoulder 220. Are arranged in a ring.

For example, FIG. 11 shows an example of a tube container in which four unit bent portions are formed, the unit bent portions are stacked and bonded to form a shoulder portion. A tube container 300 shown in FIG. 11 includes a tube main body 302 and an extraction body 4 provided at one end of the tube main body 302. The tube main body 302 includes a substantially rectangular tubular body 310, and a shoulder 320 formed between the body 310 and the extraction body 4.
The contour of the outer peripheral edge of the shoulder portion 320, that is, the contour of the boundary 306 between the shoulder portion 320 and the trunk portion 310 is substantially square, and the four overlapping portions 322 are provided around the axis of the extraction body 4 on the shoulder portion 320. Are arranged in a ring.

Alternatively, FIG. 12 shows an example of a tube container in which five unit bent portions are formed, the unit bent portions are stacked and bonded to form a shoulder portion. A tube container 400 shown in FIG. 12 includes a tube main body 402 and an extraction body 4 provided at one end of the tube main body 402. The tube main body 402 includes a substantially pentagonal cylindrical body portion 410 and a shoulder portion 420 formed between the body portion 410 and the extraction body 4.
The contour of the outer peripheral edge of the shoulder 420, that is, the contour of the boundary 406 between the shoulder 420 and the body 410 is substantially pentagonal, and the five layers 422 are arranged around the axis of the extraction body 4 in the shoulder 420. Are arranged in a ring.

 In the above-mentioned embodiment, although heat welding is used for adhesion between unit bent parts and adhesion between a unit bent part and a pouring body, the present invention is not limited to this. For example, unit bent parts are You may use an adhesive agent for adhesion | attachment of this, and adhesion | attachment of a unit bending part and a pouring body.

 In the above-described embodiment, as shown in FIG. 1C, in the multilayer portion, the resin layer in which the first resin layer or the second resin layer is welded is interposed between the folded barrier layers. However, this invention is not limited to this, For example, the resin layer does not need to interpose between barrier layers.

 In the above-described embodiment, the thickness of the shoulder portion is substantially uniform. However, the present invention is not limited to this. For example, the region corresponding to the overlapping portion of the unit bent portions is other than the shoulder portion. A thick portion having a thickness larger than that of the region (a portion where the laminate film exists as a single layer) may be formed. Since this thick portion is thick and has higher rigidity than other regions of the shoulder, it becomes a skeleton of the shoulder, and the strength of the shoulder can be further improved. The thick part is formed to have an arbitrary thickness by adjusting the heating temperature in the heat welding operation, adjusting the pressure for pressing the reduced diameter part, or bonding the unit bent part with an adhesive.

  In the above-described embodiment, the multilayer portion is formed by overlapping the barrier layer in triplicate, but the present invention is not limited to this, and the multilayer portion may be formed by overlapping the barrier layer by four or more layers. Good.

 In the above-described embodiment, the pouring body is such that the lid body is screwed to the mouth and neck portion having the opening, but the present invention is not limited to this, and any known pouring body is used. Also good.

  In the above-described embodiment, the molded pouring body is connected to the tube body. However, the present invention is not limited to this, and for example, as in the conventional method of manufacturing a tube container, the tube body is formed by compression molding. An extraction body may be provided. In compression molding, a pouring body is provided as follows. First, a female mold having an inner surface shape corresponding to the pouring body and a male mold corresponding to the inner surface shape are prepared. After the tube main body having the shoulder portion formed therein is disposed in the female mold, the molten resin is introduced into the female mold, and the mold is clamped with the male mold, whereby the pouring body can be provided on the tube main body.

1, 200, 300, 400 Tube container 2, 202, 302, 402 Tube body 4 Extraction body 6, 206, 306, 406 Boundary 10, 210, 310, 410 Body 12 Extension 13, 113 Film opening end 14 Mountain folding Part 14a, 114a Mountain fold line 16 Valley fold part 16a, 116a Valley fold line 18 Unit fold part 20, 220, 320, 420 Shoulder part 22, 222, 322, 422 Multilayer part 22a Overlapping part

Claims (4)

A tube main body formed of a cylindrical laminate film, the inside of which is a storage portion for storing contents, and a pouring body provided at one end of the tube main body, the tube main body having the one end side A barrel portion formed in a cylindrical shape, and a shoulder portion provided between the barrel portion and the extraction body and gradually reducing in diameter from the trunk portion toward the extraction body, In the tube container in which the outer diameter is smaller than the diameter of the outer peripheral edge of the shoulder portion, and the proximal end is connected to the shoulder portion,
The shoulder portion is formed by alternately forming a plurality of mountain fold portions and valley fold portions extending from an extended end toward the trunk portion in the circumferential direction of the trunk portion in the extension portion extended from the trunk portion. A unit fold part is formed by the valley fold part adjacent to the part and the mountain fold part, and an arbitrary unit fold part and another arbitrary unit fold part adjacent to the arbitrary unit fold part are formed. A tube container formed by overlapping and bonding. The laminate film is provided with a barrier layer,
2. The tube container according to claim 1, wherein an overlapping portion of the barrier layer in an overlapping portion of the unit bent portion is annularly arranged around the axis of the extraction body on the shoulder portion. A plurality of mountain folds and valley folds starting from one opening end of the cylindrical laminate film are alternately formed in the circumferential direction of the laminate film, and adjacent to each other with the mountain folds and the mountain folds interposed therebetween. A bent portion forming step of forming a unit bent portion at the valley folded portion;
A tube container manufacturing method comprising: a pour-out body attaching step in which the unit bent portions are overlapped and bonded together, and the one open end is swollen, and a pour-out body is provided at the swollen open end.   The said extraction body attachment process adhere | attaches the said unit bending parts by heat welding, The manufacturing method of the tube container of Claim 3 characterized by the above-mentioned.

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