JP5239522B2 - Spout with barrier properties - Google Patents

Description

  The present invention relates to a spout for a bag container with a spout comprising a spout composed of a cylindrical mouth portion, a cap, and an adhesive portion provided below the mouth portion, and a bag container (pouch) fixed to the adhesive portion. Is.

Conventionally, plastic soft packaging bags containers having various forms such as self-supporting bags, gusset-type bags, and other bags have been developed. For example, beverages such as juices, fruit juices, jelly-like beverages, and nutritional drinks In addition, bag containers filled and packaged with seasonings and other various foods and drinks are on the market.
In particular, in recent years, these bag containers are provided with a spout on the top of the bag container in order to facilitate the opening of the bag container and to facilitate the pouring of the contents. Bag containers with spouts have been proposed.

  However, the applicant has improved the permeation resistance of the bag container body, and as a bag container with a spout that can also prevent oxidation of the contents due to permeation of oxygen from the spout, A barrier cylinder in which a film having a barrier property is wound on a substantially equal cylindrical body is loaded into the mouth of the spout, and the spout and the barrier cylinder are formed by integral molding (Patent Document 1).

Further, the spout has a good gas barrier property and is projected by heat fusion at the pouring position of a bag-like container made of a gas barrier soft packaging material. In the molding process, a gas barrier laminated film having a gas barrier film layer made of a ceramic vapor deposition film in the vertical direction along the peripheral wall surface is arranged approximately in the middle of the thickness direction of the peripheral wall of the spout (Patent Document). 2).
JP 2007-106498 A WO2004-013008

However, in Patent Document 1, since the molding of the barrier cylinder wound with film having barrier properties was performed in-mold molding, the outer tapered side outer surface of substantially equal cylindrical body and the mouth portion of the inner diameter of the spout Therefore, since the film having a barrier property that adheres to the outer side surface of the cylindrical body also functions as a label, the taper must be taken into consideration in the production of the label, and the barrier In consideration of the taper of the cylinder, the upper and lower dimensions had to be molded with a good yield.
An object of the present invention is to eliminate the taper of the outer side surface of the cylindrical body of the barrier cylinder and facilitate the installation of the barrier cylinder in the mold in the insert molding process.

In order to solve the above-mentioned problems, the configuration of the present invention is a bag container with a spout comprising a cap part, a spout part and a spout composed of an adhesive part continuously provided below the spout part, and a bag container fixed to the adhesive part. in spout has a barrier cylinder inside which is wound a barrier film on the cylindrical body of the mouth portion, the cylindrical body is substantially equal to the outer diameter to the inner diameter of the mouth portion, of the cylindrical body A cylindrical body in which the taper of the outer cylindrical surface is 0 °, the inner cylindrical surface is provided with a taper, and the lower flange is provided at the end in the upstream direction in the direction of resin flow during integral molding of the spout , a spout having a barrier property which is formed by integrally molding the barrier cylinder.
And it is good to provide an internal surface level | step difference near the edge part of the upstream direction of the direction through which resin flows at the time of integral spout formation to a cylindrical body.
Further, it is preferable to provide an upper flange at the end portion in the downstream direction of the direction of resin flow when the spout is integrally formed on the cylindrical body.
Furthermore, it is better to extend the leg portion to the lower flange of the cylindrical body.
More preferably, the circumferential ends of the barrier film wound around the cylindrical body are polymerized.

The invention according to claim 1 of the present invention is a spout of a bag container with a spout comprising a spout comprising a cap part, a mouth part, and an adhesive part continuously provided below the mouth part, and a bag container fixed to the adhesive part. has a barrier cylinder inside which is wound a barrier film on the cylindrical body of the mouth portion, the cylindrical body is substantially equal to the outer diameter to the inner diameter of the mouth portion, said cylindrical body the outer surface tube of the taper of Jo surface and 0 °, a tapered vent on the inner surface cylindrical surface provided, a cylindrical body having a lower flange on the end of the upstream direction to the flow of the integrally molded at a resin of the spout, the barrier Since it is a spout having a barrier property formed by integrally molding a cylinder, a barrier film (label) is easily wound around the outer cylindrical surface of the cylindrical body, and the shape of the barrier film (label) is also considered to be tapered. There is no need. Similarly, when a barrier film is used as a label, there is no need to adopt a configuration that takes taper into account for the function of the label.
In addition, since the lower flange is provided at the upstream end of the flow direction of the resin during integral molding of the spout, the resin does not rotate around the barrier film (label).
Further second aspect of the present invention according to the present invention, is provided with the inner surface step near the end of the upstream direction to the flow of the spout integrally molded at a resin to the cylindrical body, the cylindrical when integrally forming the tubular body The positioning of the body is easy. That is, when the cylindrical body is inserted into the mold, the position of the cylindrical body can be fixed by the step on the inner surface of the cylindrical body, and positioning is easy.
The invention according to claim 3 of the present invention is, since the upper flange provided on the end portion of the downstream direction of flow of the spout integrally molded at a resin to the cylindrical body, the upper flange and the lower flange on the way the molding so the same diameter It is easy to handle when it rolls, and there is no sense of incongruity in the outer shape, and the barrier film (label) does not protrude beyond the upper flange.
In the invention according to claim 4 of the present invention, the leg portion is extended to the lower flange of the cylindrical body, so that positioning is further facilitated and the strength of the leg portion is imparted even when the mold is pressed by integral molding. As a result, the positioning becomes more accurate.
In the invention according to claim 5 of the present invention, since the circumferential ends of the barrier film wound around the cylindrical body are polymerized, the barrier property of the cylindrical body can be further improved.

  A spout-equipped bag container 20 provided with a spout 1 having a barrier property (a spout) according to the present invention projects from a bag container 3 (pouch) and the inside of the bag container 3 to the outside as shown in FIG. And a cap portion 2 for opening and closing the spout 1. In addition, in the content which has higher barrier property, and the spout with a barrier for retorts, you may stick the P seal | sticker 13 peeled at the time of initial opening to the tip of spout 1.

As shown in FIG. 2, the spout 1 includes a mouth portion 5 that protrudes outside the bag container 3 (see FIG. 1), and an adhesive portion that is connected to the lower portion of the mouth portion 5 and is attached to the bag container 3. 6 and a connecting column 10 is provided below the bonding portion 6.
The spout 1 is provided with a thread 9 for screwing the cap portion 2 on the outer periphery of the mouth portion 5, and the spout 1 and the bag container 3 are pasted between the mouth portion 5 and the adhesive portion 6. When wearing, it has a structure provided with a plurality of flanges 4 necessary for gripping and transporting the spout. In addition, four connection columns 10 are provided below the bonding portion 6, and the four connection columns 10 are joined to the connection disk 10 </ b> J at the lower portion thereof, and the space of the four connection columns 10 is formed. Then, the contents are filled or sucked from the mouth part 5, and the contents are taken out well.

  A barrier cylinder 7 having a barrier property is integrally formed in the mouth portion 5 of the spout 1 by insert molding. That is, as shown in FIG. 3, the outer diameter of the barrier cylinder 7 is substantially equal to the inner diameter of the mouth part 5 of the spout 1, and the length of the barrier cylinder 7 is from the upper part of the mouth part 5 to the lower part of the flange 4. It is formed in the middle of the bonding portion 6 and is substantially equal to the length of the portion of the spout 1 that protrudes outside from the bag container 3.

An example of this barrier cylinder 7, as shown in FIG. 4 (a), a cylindrical tubular body 7P, consists of a sheet of barrier film 7S, cylindrical body 7P constituting the barrier cylinder 7, The barrier cylinder 7 is formed by attaching a barrier film 7S having various characteristics such as light shielding properties and transmission resistance to the cylindrical body 7P, which is manufactured in advance by injection molding or the like .
And when shape | molding the spout 1 by insert molding, the barrier cylinder 7 and the spout 1 are integrally molded by setting the barrier cylinder 7 in the metal mold | die which shape | molds the spout 1 previously. As will be described later, the barrier cylinder 7 is formed by winding a barrier film 7S around a previously formed cylindrical body 7P.
As the barrier film 7S, an appropriate barrier film 7S such as an aluminum film, a carbon-deposited film, or a multilayer coating film having permeation resistance and light-shielding resistance may be used.

Further, the cylindrical body 7P of the barrier cylinder 7 is preferably made of the same material as that of the spout 1, and an existing material such as PE or PP can be used. In this case, as shown in FIG. 3, since the spout 1 after molding has the barrier cylinder 7 and the mouth portion 5 integrally formed, the cross section of the mouth portion 5 of the spout 1 has a cylindrical body 7P / barrier film. 7S / mouth portion 5 is formed in this order (see FIG. 5A). Therefore, since the material of the cross section of the spout 1 constitutes PE / barrier film / PE, while preventing permeation of gas such as oxygen, the contents do not directly touch the barrier layer.

Further, as shown in dotted circle portion in FIG. 3, the upper end portion (a dotted circle portion) of the cylindrical body is covered with a resin of the spout 1, similarly, the lower end portion (a dotted circle portion of the tubular body ) Also covered with spout resin. Therefore, the upper end and the lower end of the cylindrical body are integrated with the spout resin. Therefore, the barrier film inserted between the cylindrical body and the spout is completely sealed.

  The barrier film 7S has a highly reliable barrier property in terms of hygiene because aluminum or the like of the barrier film 7S is in direct contact with the contents passing through the mouth portion 5 and metal such as aluminum does not melt into the contents. Spout 1 can be provided.

  Next, an example of the bag container 3 will be described with reference to FIG. 6. As the bag container 3, plastic soft packaging bags having various forms can be used, and a single sheet is folded inward 2. The left and right side surfaces (16, 17), a part of the front surface 14 and the bottom surface 18 made of one sheet, and a joint portion of the back surface 15 and a part of the bottom surface 18 made of one sheet h is heat-sealed to form the gusset bag 3. And after inserting the spout 1 from the upper opening part 11, the adhesion part 6 of the spout 1 and the junction part h of the opening part 11 are heat-sealed, and the bag container 20 with a spout is formed.

  In the present invention, as an example of forming the spout-equipped bag container 20 from the spout 1 and the bag container 3, first, the spout 1 having a barrier property by integrally molding the barrier cylinder 7 and the mouth portion 5 by insert molding or the like. On the other hand, a bag container 3 made of a plastic flexible packaging bag such as a gusset bag is manufactured. Next, the spout 1 having the barrier property is formed in the opening 11 formed in the upper part of the bag container 3. A spout-equipped bag container 20 is manufactured by bringing the constituting adhesive portion 6 into contact with each other and adhering them together by heat sealing or the like at the contact portion. The spout-equipped bag container 20 is filled with contents (not shown) from the mouth part 5 of the spout 1, and then the cap part 2 is screwed onto the thread 9 formed on the mouth part 5. By sealing, it is possible to manufacture a packaged product comprising the spouted bag container 20 provided with the spout 1 having the barrier property of the present invention.

  Thus, in the spout 1 according to the present invention, the barrier cylinder 7 made of a cylinder equipped with a barrier film 7S having a barrier property prepared separately in advance is loaded in the cylindrical mouth portion 5. Since the spout 1 and the barrier cylinder 7 are integrally insert-molded to produce a spout having a barrier property, the manufacturing process is simple, and various properties such as permeation resistance and light resistance are provided. Since the barrier film 7S can be appropriately changed according to the target resistance, the barrier film 7S can be applied to the spout 1 having various resistances and has high applicability. In addition, since it is not necessary to directly form an aluminum film or the like on the spout 1 by vapor deposition or the like, it is possible to produce the spout 1 having a barrier property with a simple configuration.

That is, the spout 1 having a barrier property of the present invention forms the barrier cylinder 7 by molding the barrier film 7S and the cylindrical body 7P, and then integrally molds the barrier cylinder 7 and the spout. Thus, the spout 1 having the barrier property can be formed, and the spout having the barrier property of the present invention can be easily formed at low cost by conventional in-mold molding .

An example of a preferred method for manufacturing the barrier cylinder of the spout 1 having barrier properties according to the present invention will be described with reference to Example 1.
Example 1
Hereinafter, a method of forming the barrier cylinder 7 by integrally molding the barrier film 7S and the cylindrical body 7P will be described.
First, a cylindrical body 7P, molded by injection molding. As shown in FIG. 7, the cylindrical inner surface of the cylindrical body 7 </ b> P has a taper (inner taper) in the direction from the lower flange 73 to the upper flange 71 at the bottom, and the male mold is in the direction of the upper flange 71. Pulled out after injection molding . This is the portion indicated by θ ° in in FIG. And the taper is not provided in the cylindrical outer surface of the cylindrical body 7P. This is the portion indicated by “0 °” in FIG. To an outer surface of the cylindrical body 7P tapered 0 ° is to the left and right cylindrical body 7P to split, the method of inserting the male from the top, it is possible to form.
The taper angle θin of the inner surface taper formed on the barrier cylinder 7 is preferably in the range of 0.1 ° to 3.0 °.

Next, the peripheral surface of the side surface of the cylindrical body 7P formed as shown in FIG. 7 is wound with the barrier film 7S. FIG. 8 is an explanatory view showing a state in the middle of winding the barrier film 7S around the cylindrical body 7P. Then, the barrier film 7S plays the role of labels, by winding the circumferential surface of the side of the molded cylindrical body 7P barrier film 7S, as illustrated in FIG. 5 (a), the barrier The circumferential end of the film 7S is polymerized. Thereafter, the barrier film 7S is bonded to the cylindrical body 7P by a method such as ultrasonic wave, heat sealing, and adhesion.
And the state which wound the surrounding surface of the side surface of the cylindrical body 7P with the barrier film 7S is the state shown by Fig.4 (a). Thereafter, the barrier cylinder 7 is inserted into the mold, and the main body is injection molded (see FIG. 9). As shown in FIG. 5A, the cross section of the state of the mouth portion 5 including the barrier cylinder 7 in the state after injection molding is formed by winding the peripheral surface of the side surface of the cylindrical body 7P with the barrier film 7S. In the state, the outer peripheral surface is injection- molded , and the barrier film 7S is shown as a superposition part 7E in a state where the end parts are superposed at the end parts in the circumferential direction.

Further, the barrier cylinder 7 has a plurality of positioning members (71, 71) that can easily and accurately position the barrier cylinder in the mold when the barrier cylinder and the spout, which will be described later, are integrally formed. 73) is formed. As this positioning member, an upper flange 71 made of a convex member outwardly above the barrier cylinder 7 and a lower flange 73 made of a convex member outwardly formed below the barrier cylinder 7 are formed. Thus, when the barrier cylinder and the spout are integrally formed, the barrier cylinder 7 can be accurately positioned.
And it is possible to form the spout 1 which has the barrier property of this invention by integrally molding this barrier cylinder 7 and a spout.

Referring to FIG. 9, the barrier cylinder 7 is set in molds a, b, c, and d for forming a spout. First, the barrier cylinder 7 is inserted into the protruding portion of the mold d.
Then, positioning is performed such that the tip of the flange portion 71 of the barrier cylinder 7 is in contact with the lower end of the mold d. Even in this case, the end face of the barrier film adheres to the inside of the flange 71 due to the effect of the flange portion 71 of the barrier cylinder, so that the barrier film is not exposed to the inside of the barrier cylinder.
Next, the left and right molds b and c are moved horizontally to the respective fixed positions. Thereafter, the upper mold a is moved downward.
Then, by filling the resin from the resin injection portion (not shown) through the gate provided in the mold a (see the gate provided in the mold a in FIGS. 9A and 9B), as shown in FIG. It is possible to form the spout 1 having a barrier property in which the barrier cylinder 7 and the spout are integrally formed. In particular, as shown in the dotted circle in FIG. 3, the lower end portion of the barrier film 7S is covered with the spout resin up to the upper portion of the flange 73, so that the lower end portion of the barrier film 7S is exposed to the inside of the spout. There is no. Similarly, the upper end portion of the barrier film 7S is formed by integrally molding the resin of the upper end portion of the barrier cylinder and the spout, and the end face of the barrier film is located below the flange portion of the barrier cylinder. The upper end portion of 7S is not exposed to the inside of the spout.

  Therefore, the film 7S having barrier properties is hermetically sealed while being positioned outside the spout and inside the spout, and is never exposed inside the spout, and the barrier film material may enter the spout. There is no. Furthermore, even if the inner ring inside the cap portion and the inside of the spout are in contact with each other, the inner ring does not come into contact with the barrier film 7S, and the barrier film 7S is not damaged. And hygienic properties.

In the above Example 1, after shape | molding the cylindrical body 7P, the said barrier film 7S is wound around the cylindrical body 7P. Then, in order to insert- mold the barrier cylinder 7 in which the barrier film 7S is wound around the cylindrical body 7P, it is necessary to provide a draft taper (θ ° in) on the cylindrical inner surface of the cylindrical body 7P. It is not necessary to provide a taper of taper (θ ° out), so that it is easy to wind the barrier cylinder 7 when the barrier film 7S is wound. Further, the upper flange 71 and the lower flange 73 can have the same diameter, and are easy to handle. Further, even when the cylindrical body 7P is provided up to the end of the mouth due to the presence of the upper flange 71, the barrier film 7S (label) is provided in the portion up to the lower portion of the flange 71, so that the barrier film 7S (label) There is no problem in function. In addition, since the lower flange 73 is provided, the flow of the resin is restricted, and the resin can be prevented from turning around the back surface of the label when the spout body is molded (see FIG. 5B).

As the spout body, as shown in FIG. 9, since the resin is injected from the lower end of the spout body, the resin flows through the connecting column 10 (see FIG. 3). Therefore, the lower flange 73 is necessary, and the upstream direction of the resin at the time of integral molding is the direction of the lower end portion of the spout body, and the resin first passes near the lower flange with respect to the barrier cylinder 7 due to the flow of the resin. A lower flange is provided in order to avoid the influence of the flow. FIG. 5B shows a drawing showing this state.
In addition, the connection pillar 10 of a spout main body functions effectively for filling and taking out the contents. Further, the spout body connecting column 10 also has a function of holding the spout body when the spout and the pouch are sealed by the bonding portion 6.

Since the barrier film 7S (label) is polymerized at the ends in the circumferential direction of the barrier film 7S as shown in FIG. 5A, the barrier property can be improved. When the barrier film 7S (label) is molded in-mold integrally with the cylindrical body 7P, it cannot be adopted because the resin around the polymerization portion occurs. In Example 1, since the barrier film 7S (label) is wound around the cylindrical body 7P, polymerization is possible.
The structure of the barrier film 7S (label) of Example 1 is PE / PET / AL / PE inside from the outside. PET is used to maintain the strength as a label.
Thus, the barrier film 7S (label) has a function of bonding together the inner cylindrical body 7P and the resin formed by the outer insert molding .
As described above, as a method for winding and adhering the barrier film 7S (label) to the cylindrical body 7P, there are methods such as adhesion, heat sealing, and ultrasonic waves. This is a means for temporarily adhering the film 7S (label), and further, the heat of the insert molding causes the barrier film 7S (label) and the cylindrical body 7P to be thermally welded by the function of the sealant (adhesive) inside the label. To reach.
Furthermore a barrier film 7S (label) and spout body of the molding resin by the function of the label outside the sealant (adhesive), the barrier film 7S (label) and the molding resin reaches the heat welding conditions, the barrier film 7S (label ) And the cylindrical body 7P are more firmly adhered and closely adhered to each other in the adhesive state between the barrier film 7S (label) and the molding resin of the spout body.

(Example 2)
The first embodiment is formed by positioning at the time of insert molding mainly by the upper flange 71, but the second embodiment is provided with the inner surface step (inner surface lateral rib) 72 of the lower flange 73. (See FIG. 10). This inner surface level difference (inner surface lateral rib) 72 is a catch for positioning in the male mold at the time of insert molding , and by providing this, the barrier cylinder 7 is kept at a predetermined distance from the opening of the spout. Insert molding is possible. FIG. 11 shows an embodiment of the barrier cylinder 7 provided with an upper flange 71, a lower flange 73, and an inner surface step (inner surface lateral rib) 72.
Incidentally, the inner surface step 72, for example above the lower flange of FIG. 9, over the shaping of the connecting post from the molding of the bonded portion, is suitable to positioning by utilizing a portion and has a step (see FIG. 9 (b)) is there.

(Example 3)
In the third embodiment illustrated in FIG. 12, the upper flange 71 is omitted from the barrier cylinder 7 provided with the upper flange 71, the lower flange 73, and the inner surface step (inner surface lateral rib) 72 of the second embodiment.

Example 4
In Example 4 shown in FIG. 13, the barrier cylinder 7 provided with the upper flange 71, the lower flange 73, and the inner surface step (inner surface lateral rib) 72 is further provided with a leg portion 75 below the lower flange 73, for example, The barrier cylinder 7 is positioned at the lower part of the die of the bonding portion 6 and has a strength that can withstand a degree of pressing operation between the dies when the die is put on standby at a predetermined position during insert molding. Thus, the positioning of the barrier cylinder 7 within the spout is intended. Further, when the mold is clamped, the leg portion 75 is pushed and can be set at a predetermined position. Even when the barrier cylinder 7 is not provided at an accurate position, the leg 75 can be pushed and set at a predetermined position.

  The barrier film 7S is not particularly limited as long as it does not transmit a gas such as oxygen, and examples of the material of the film 7S include aluminum, carbon, silica, and the like. In particular, an aluminum film is preferable, but in addition to this, by using a multilayer film such as EVOH, it is possible to improve permeation resistance and light shielding resistance.

In integrally forming a barrier film 7S and the cylindrical body 7P is necessary to use a multi-layer film for forming integrally the barrier film 7S in the spout 1 and the tubular body 7P, as an example of a multilayer film Although exemplified in Example 1, in addition, both surfaces of the barrier film 7S may be sandwiched between PE and PP, and in this case, a multilayer film configuration such as PE / Al / PE or PP / Al / PP may be mentioned. Furthermore, the waist and strength of the barrier film 7S may be increased, and examples thereof include PE / PET / Al / PE and PE / Ny / Al / PE film configurations.

The cylindrical body 7P is preferably made of a resin such as polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), nylon (Ny), but is not limited to this, and the cylindrical body 7P. Any resin may be used as long as the shape can be formed and the barrier film 7S can be attached.

  Moreover, what is necessary is just to use the material conventionally used for the material of the spout 1 suitably, for example, a low density polyethylene resin, a medium density polyethylene resin, a high density polyethylene resin, a linear low density polyethylene resin, a polystyrene resin, an ionomer resin, for example. And resins such as polypropylene resin, acrylic resin, nylon resin, polyester resin, and polycarbonate resin.

  The present invention provides a spout having both barrier properties and display properties. However, the present invention is not limited to the above-described embodiments, and may be appropriately modified as long as it is within the scope of the present invention. It is included in the present invention.

It is an external appearance perspective view of the bag container 20 with a spout of this invention. It is a perspective view of the spout 1 of this invention. It is a notch longitudinal cross-sectional view of the front view of the spout 1 of this invention. (A) is a perspective view of the barrier cylinder 7 of the present invention, and (b) is a longitudinal sectional view of the barrier cylinder 7. (A) is a longitudinal cross-sectional view of the mouth part 5 of the spout 1 of the present invention, and (b) is an explanation showing the molding state of the lower flange 73 when the barrier cylinder 7 is placed in an insert molding die and injection molded. FIG. It is explanatory drawing of the state which adhere | attaches the spout 1 of this invention with the bag container 3 (pouch). It is explanatory sectional drawing explaining the inner taper and outer taper (0 degree) of the cylindrical body 7P of the spout 1 of this invention. It is the perspective view explaining the state which winds the barrier film 7S around the cylindrical body 7P of the spout 1 of this invention. It is drawing explaining the insert molding state of Example 1 of this invention, (a) is a perspective sectional view, (b) is a front sectional view. It is a perspective view containing the partially notched cross section of the barrier cylinder 7 of Example 2 of this invention. (A) of the barrier cylinder 7 of Example 2 of this invention is a front view, (b) is sectional drawing. (C) is a front longitudinal cross-sectional view, (d) is a side longitudinal cross-sectional view of the spout 1 molded with the barrier cylinder 7 according to the second embodiment of the present invention. (A) of the barrier cylinder 7 of Example 3 of this invention is a front view, (b) is sectional drawing. (C) is a front longitudinal cross-sectional view, (d) is a side longitudinal cross-sectional view of the spout 1 molded by incorporating the barrier cylinder 7 of Example 3 of the present invention. (A) of the barrier cylinder 7 of Example 4 of this invention is a front view, (b) is sectional drawing. (C) is a front longitudinal cross-sectional view, (d) is a side longitudinal cross-sectional view of the spout 1 molded with the barrier cylinder 7 of Example 4 of the present invention.

Explanation of symbols

1 Spout 2 Cap 3 Bag container (pouch)
4 Flange 5 Portion 6 Adhesion 7 Barrier cylinder 7P Tubular body 7S Barrier film (label)
7E superposition part 9 thread 10 connecting pillar 11 opening (bag container 3)
10J connecting disc 13 P seal 20 bag container with spout 71 upper flange 72 inner surface step (inner surface lateral rib)
73 Lower flange 75 Legs a, b, c, d Mold

Claims (5)

In the spout of a spout with a spout consisting of a cap part, a mouth part, and an adhesive part provided continuously below the mouth part, and a bag container fixed to the adhesive part,
Inside the mouth portion has a barrier cylinder in which a barrier film is wound around a cylindrical body,
The tubular body is substantially equal to the outer diameter to the inner diameter of the mouth portion, the tapered outer surface cylindrical surface of the cylindrical body and 0 °, a tapered vent on the inner surface cylindrical surface provided, at integral molding of the spout A cylindrical body provided with a lower flange at the upstream end of the resin flow direction ,
A spout having a barrier property, wherein the barrier cylinder is formed by integral molding. The spout having a barrier property according to claim 1, wherein an inner surface step is provided in the cylindrical body in the vicinity of an upstream end portion in a direction in which resin flows during integral spout molding . The spout having a barrier property according to claim 1, wherein an upper flange is provided at an end portion in a downstream direction in a direction in which resin flows when the spout is integrally formed on the cylindrical body.   The spout having a barrier property according to claim 1, wherein a leg portion extends from a lower flange of the cylindrical body. The spout having a barrier property according to claim 1, wherein circumferential ends of the barrier film wound around the cylindrical body are polymerized.

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