JP2005206163A - Bag with plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag with a plug having excellent sealability and re-sealability and particularly, enhanced openability of a cap in the field of the bag with the plug to seal and package a content such as a liquid. <P>SOLUTION: A bag is formed by heat-sealing a laminate film, and a spout 20 formed of a plastic molded body and a cap 30 screwed and fitted to the spout 20 are mounted on a part of an upper portion of the bag. The cap 30 has at least a top plate and a peripheral wall which is continuously provided in a vertical direction to the top plate, and a screw part to be screwed to a screw part of the spout 20 is provided on an inner peripheral surface of the peripheral wall, and a finger-hooking projecting part 34 to facilitate the opening/closing by turning the cap 30 is provided on the outer surface of the cap 30 to constitute the bag 100 with the plug. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bag with a stopper, and more particularly, the bag is filled with a fluid content such as liquid, and a spout with a relatively small diameter is attached as a content outlet, and the spout When a cap of the type that is screwed into the spout is used as a cap for closing the cap, the cap is easily tightened and requires a large force to remove it. In such a case, the present invention relates to a bag with a cap that allows anyone to easily remove a cap with a small force.

Conventionally, when a liquid content such as liquid is sealed and packaged, and the content is used by dividing it into multiple times, a bag with a cap is used as a simple type container having resealability. It has come to be used.
As such a bag with a plug, for example, a bag body is generally formed of a laminated film, and a part having a cap formed of a plastic molded body attached to a part of the upper part or the like is generally used. In particular, with regard to the cap, in order to ensure its re-sealing, a cap (screw type cap) of a type that is screwed into the spout and attached is mainly used.
Such a bag with a stopper can be designed freely according to the purpose of use, such as the diameter and length of the spout, and the spout has a shape retaining property (hardness). The spout will not be blocked even at the spout, and it can be re-sealed with a cap.Further, since the bag body after use can be folded flat, it is not bulky compared to bottles and is easy to dispose of. It has been used conveniently because it is.

However, in such a bag with a stopper, a spout with a relatively small diameter is often attached, and a cap with a relatively small diameter is used correspondingly, particularly in the case of a screw-type cap, When the diameter is small, there is a problem that the cap is easily tightened and a large force is required for opening.
In order to solve such a problem, the screw-type cap usually has a circular top plate and a peripheral wall extending continuously downward on the outer periphery as a main configuration, and the inner periphery of the peripheral wall. The surface is provided with a threaded portion that is screwed into a threaded portion provided on the outer peripheral surface of the spout tip, and the outer peripheral surface of the peripheral wall is provided with a vertical anti-slip for facilitating mounting and removal of the cap. The structure which provided the uneven | corrugated strip of the direction is taken.
Such an uneven strip for preventing slipping has been used for screw caps for a long time, and is also used for spout caps attached to various liquid pouches. Although there is no special effect other than to prevent slippage when attaching and removing caps and facilitating the operation of attachment and removal, it is shown in the figure, but especially detailed explanation is No (see, for example, Patent Document 1 and Patent Document 2).
Japanese Patent Laid-Open No. 11-35051 (pages 6-7, FIG. 1, FIG. 2, reference numeral 13) Japanese Patent Laid-Open No. 2000-7002 (FIGS. 1, 3, 4, and 5)

By providing the above-described vertical uneven strips for preventing slipping on the outer peripheral surface of the cap peripheral wall, slipping can be prevented when the screw type cap is attached and removed. Even when the cap is small, for example, when the cap is removed, the cap can be opened and closed with almost no problem even if it feels a little hard. However, when the user is an elderly person or a sick person, there is a problem that the cap cannot be easily opened because it is hard to remove by rotating the cap, particularly at the time of opening the first time.
This is especially the case with a bag with a cap, since the bag itself is formed of a flexible material, when the cap is opened and closed, the other cannot be held by the bag body, such as an adhesive base of a spout, etc. Since it is necessary to rotate the cap while holding the cap, there is a problem that the opening and closing of the cap becomes more troublesome.
In addition, as a method for improving the ease of opening the cap alone, for example, there is a method of increasing the diameter of the outer peripheral wall by making the peripheral wall of the cap a double structure. (Mass) also increases, and there is a problem that the cap used for the bag is not necessarily appropriate in terms of appearance and cost.

  The present invention has been made in order to solve such problems, and the problem is that in the field of a bag with a cap for sealing and packaging a fluid content such as a liquid, the cap is a plastic. Formed with a spout by a molded product and a cap that is screwed onto the spout, and is excellent in resealability, and has a small spout diameter and a relatively small cap diameter However, it is an object of the present invention to provide a bag with a stopper that does not require a great force for attaching and detaching the cap and that can be easily opened and closed even by a weak person such as an elderly person or a sick person.

The above problems can be solved by the following present invention.
That is, the invention described in claim 1 is a bag with a cap for hermetically wrapping a fluid content such as a liquid, and the bag heats a laminated film of two or more layers having a sealant layer as an innermost layer at least. The spout is formed of a plastic outlet and a cap screwed onto the spout, and the spout is at least centered on a cylindrical tube portion. The outer periphery on the distal end side has a screw portion for attaching a cap, the intermediate portion has one or more flange portions, and the base portion has a cross section having a width larger than the diameter of the cylindrical portion. It is formed into a shape having a bowl-shaped adhesive base, and is attached to the bag by thermal bonding between the outer surface of the adhesive base and the inner surface of the bag, and the cap is suspended from at least the top plate and the top plate. An inner periphery of the peripheral wall Is provided with a threaded portion that is screwed into the threaded portion of the spout, and has a finger-hanging projection on the outer surface of the cap for facilitating opening and closing by rotation of the cap. It consists of a bag with a mouthpiece.
The invention described in claim 2 is the bag with a stopper according to claim 1, wherein a pilfer proof structure is provided between the spout and the cap in the stopper.
The invention described in claim 3 comprises the bag with a stopper according to claim 1 or 2, wherein a blocking prevention rib is provided below the adhesive base of the spout.
According to a fourth aspect of the present invention, the bag according to any one of the first to third aspects, wherein the bag is a standing pouch type or gusset pouch type bag.

According to the first aspect of the present invention, a bag with a cap is formed by heat-sealing two or more laminated films having a sealant layer as an innermost layer at the bag body, and the cap is made of plastic. A spout formed by a molded body and a cap that is screwed into the spout, and the cap is attached to the outer periphery on the tip side with at least a cylindrical tube portion as the center. In the shape of having an adhesive base with a cross section that has a width larger than the diameter of the cylindrical portion at the base, and has a screw portion for The cap is attached to the bag by thermal bonding between the outer surface of the adhesive base and the inner surface of the bag, and the cap has at least a top plate and a peripheral wall continuously suspended from the top plate, On the inner peripheral surface of the peripheral wall is the screw part of the spout When the spout is thermally bonded to the bag, a screw portion is provided on the outer surface of the cap to facilitate opening and closing by turning the cap. In addition, it is possible to prevent the occurrence of sealing failure such as omission of seals, to improve and stabilize the quality, and at the same time, the sealing work becomes easy and the productivity can be improved.
Moreover, since the main body of the bag with a stopper is formed of a laminated film, it can be folded, and an empty container such as a bottle is not bulky, and can be stored and transported efficiently. The plugs, that is, the spout and the cap, are also opened and closed by tightening the screw portion by turning the cap, so that the sealing performance is good and the resealability is also excellent. Therefore, even when the contents filled in the bag with a stopper are taken out and used little by little, the remaining contents can be safely stored until the next use.
In addition, the cap's outer surface is provided with a finger-hanging projection for facilitating opening and closing by turning the cap, so even if the diameter of the spout is small and the cap diameter is relatively small accordingly. The cap can be opened and closed with a small force, and even a weak person such as an elderly person or a sick person can easily open and close the cap.
And since the bag with a stopper after use at least the main body can be folded flatly, it is not bulky and can also contribute to volume reduction of waste.

According to the invention described in claim 2, in the configuration of the bag with a stopper according to the invention described in claim 1, a pilfer proof structure is provided between the spout and the cap in the stopper. Therefore, in addition to the function and effect of the invention described in claim 1, when the cap is opened illegally, it can be determined at a glance, and it is easy to determine whether the contents are safe. I can know.
Moreover, as a general structure of a pilfer proof, for example, there is a fixing ring system that is separated by opening that is often used for screw-type caps of beverage PET bottles, Although it can be used suitably also for a cap, if such a pilfer proof structure is provided, the removal of the cap is likely to become harder. However, even in such a case, the cap-attached bag of the present invention is provided with a finger-hanging protrusion for facilitating opening and closing by turning the cap on the outer surface of the cap, so that the cap can be easily and without problems. Can be removed.

  According to the invention described in claim 3, in the structure of the bag with a cap according to the invention described in claim 1 or 2, since the blocking prevention rib is provided below the adhesive base of the spout, In addition to the operational effects of the invention described in claim 1 or 2, when the contents filled in the bag are poured out, the films before and after the bag adhere to each other even when the remaining amount of the contents decreases. Thus, it is possible to prevent the movement of the contents to the spout, and the contents can be smoothly poured out to the end.

According to the invention described in claim 4, in the configuration of the bag with a stopper according to any one of claims 1 to 3, the bag is configured as a standing pouch type or gusset pouch type bag. In addition to the function and effect of the invention according to any one of claims 1 to 3, in any type of bag, the bag filled with the contents greatly expands in the front and rear, and is almost flat on the bottom. Since the bottom surface is formed, it has excellent independence.
Therefore, it becomes easy to handle the bag with a plug filled with the contents, the appearance and the display effect are improved, and the bag can be packaged compactly for its capacity.

In the present invention, the shape of the bag is not particularly limited. For example, in addition to a flat bag such as a three-side seal type, a four-side seal type, or a pillow type, a bag having a self-supporting type such as a standing pouch type or a gusset pouch type. Any of these can be used.
こ れ ら Among these, standing pouch type or gusset pouch type bags can impart excellent self-supporting properties to the bag as described above, and can easily handle a bag with a plug filled with contents. At the same time, the appearance and display effect are improved, and the packaging can be made compact, so that it can be used more suitably.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 and FIG. 2 are front views showing the configuration of an embodiment of a bag with a cap according to the present invention.
FIG. 3 is a view showing a configuration of an example of a spout used for a bag with a cap according to the present invention, where (A) is a front view of the spout, and (B) is a lower side of the spout shown in (A). It is the top view seen from.
FIG. 4: is a front view which shows the structure of another example of the spout used for the bag with a stopper of this invention.
FIG. 5 is a diagram showing a configuration of a first example of a spout cap used in the bag with a cap of the present invention, in which (a) is a front view of the cap and (b) is a plan view of the cap.
6A and 6B are diagrams showing a configuration of a second example of the spout cap used in the bag with a cap of the present invention, where FIG. 6A is a front view of the cap, and FIG. 6B is a plan view of the cap.
FIG. 7 is a diagram showing a configuration of a third example of a spout cap used in the bag with a cap of the present invention, in which (a) is a front view of the cap and (b) is a plan view of the cap.
FIG. 8: is a front view which shows the structure of the 4th example of the cap of the spout used for the bag with a stopper of this invention.
However, the present invention is not limited to these drawings.

The spout 20a shown in (a) and (b) of FIG. 3 is provided with an adhesive base 22 having a bowl-shaped outer cross-section for attaching to the bag by thermal bonding to the bottom of the cylindrical part 21. A main flange 23a is provided thereon, and auxiliary flanges 23b and 23c used for conveyance and the like are provided at appropriate intervals on the uppermost portion, as shown in FIGS. A screw portion 24 for screwing such a cap is provided.
The adhesive base 22 is formed so that the upper and lower lines approach a smooth curved line shape and match at both ends, like a bowl shape instead of a circle, thereby facilitating thermal bonding with the bag. At the same time, it is possible to prevent the occurrence of pinholes due to missing seals. Further, when removing the screwed cap after being attached to the bag, the cap is rotated while holding the adhesive base 22 from the outside of the bag. It is preferable to form larger than the diameter of the part 21.
As for the cylindrical portion 21, the portion provided with the uppermost screw portion 24 may be cylindrical, but the portion between the flanges 23 c, 23 b, 23 a below it has a rectangular outer shape so that heat to the bag can be obtained. Positioning at the time of adhesion or the like can be facilitated.

The spout 20b shown in FIG. 4 has the same structure as the spout 20a shown in FIG. In addition, a fixing ring engaging portion 28 for providing a fixing ring type pill fur proof structure between the cap and the cap is additionally provided on the uppermost flange 23c.
In this case, a cap 30d with a fixing ring 35 having a configuration shown in FIG. 8 to be described later can be used as a cap that is screwed onto the screw portion 24 at the upper portion of the spout 20b.

As described above, the spouts 20a and 20b as shown in FIGS. 3 and 4 can be easily manufactured by plastic injection molding. The attachment to the bag is performed by thermally bonding the adhesive bases 22 of the spouts 20a and 20b to the inner surface of the bag, that is, the sealant layer of the laminated film, from the viewpoint of productivity, adhesion reliability and safety. It is done.
Accordingly, the material of the spouts 20a and 20b is preferably a polyolefin resin such as polyethylene, polypropylene, or a copolymer thereof that can be thermally bonded to the sealant layer as a whole or at least the outer peripheral surface of the adhesive base 22. .

  Next, FIGS. 5 to 8 are views showing the structure of a cap used by screwing into the spout shown in FIG. 3 or FIG. 4, respectively. The cap 30a shown in FIG. As shown in the front view and the plan view of (B), it has a circular top plate 31 and a peripheral wall 32 that hangs continuously on the outer periphery thereof, and a vertical uneven strip for preventing slipping on the outer peripheral surface of the peripheral wall 32. 33 and a pair of plate-like protrusions for hooking fingers that project laterally are provided on the outer surface of the peripheral wall 32. The inner peripheral surface of the peripheral wall 32 corresponds to the uppermost threaded portion 24 of the spout 20a. In addition, for example, when the cap 30a is screwed to the spout 20a, an opening is made in contact with the tip of the spout 20a on the inner surface of the top plate 31. A packing (not shown) for closing the part in a liquid-tight manner is mounted.

  By adopting such a configuration, the spout 20a can be closed with a good sealing property, and it has excellent resealability. When the cap 30a screwed to the spout is removed, the outer surface of the peripheral wall 32 is In particular, since a pair of plate-like protrusions 34 for hooking fingers that protrude in the lateral direction are provided, the cap 30a can be rotated by hooking a finger on these portions. Therefore, compared with a conventional cap in which only the vertical concavo-convex strip for preventing slippage is provided on the outer peripheral surface of the peripheral wall 32, the lever action can be used by the pair of plate-like protrusions 34 for finger hooking. The cap 30a can be easily opened and closed by rotating it with a smaller force.

The cap 30b shown in FIG. 6 has only a pair of plate-like protrusions 34 for protruding on the lateral side provided on the outer surface of the peripheral wall 32 in the configuration of the cap 30a shown in FIG. As shown in (b), on the outer surface of the circular top plate 31, the circular shape is divided into two halves in a straight line and changed into a plate-like finger-hanging protrusion 34 extending vertically upward in a rectangular shape. It is provided and configured.
In addition, although the circular hole was provided in the substantially center part of the protrusion part 34 for the rectangular plate-like finger hook, this hole can reduce the amount of resin used in the cap as much as possible to obtain a cost merit. If necessary, a rod-like body is inserted into this hole so that it can be used for turning the cap 30b.
Even when such a configuration is adopted, the same operational effects as those described for the cap 30a having the configuration shown in FIG. 5 can be obtained.

The cap 30c shown in FIG. 7 has, in the configuration of the cap 30a shown in FIG. 5 described above, only a pair of plate-like finger-hanging protrusions 34 protruding in the lateral direction provided on the outer surface of the peripheral wall 32. As shown in (b), the plate-like finger-hanging protrusion 34 extends in the lateral direction and vertically upward from the peripheral wall 32 to the outer surface of the top plate 31 and is provided.
Even when such a configuration is adopted, when removing the cap 30c screwed into the spout, the cap 30c is hung by placing a finger on the upper protrusions on both sides of the heart-shaped plate-like protrusion 34 for finger hooking. Therefore, the cap 30c can be easily opened and closed with a small force, and the same effects as those described for the cap 30a having the configuration shown in FIG. 5 can be obtained.

The cap 30d shown in FIG. 8 is fixed to the cap 30a shown in FIG. 5 via a plurality of detachable connecting portions 36 below the peripheral wall 32 of the cap in order to further provide a pill fur proof function. A ring 35 is additionally provided.
Such a cap 30d with the fixing ring 35 has a fixing ring engaging portion 28 on the outer peripheral surface of the cylindrical portion 21 between the screw portion 24 and the uppermost flange 23c, like the spout 20b shown in FIG. Although not shown in the drawing, the fixing ring engaging portion 28 of the spout 20b is used on the lower inner peripheral surface of the fixing ring 35 of the cap 30d. A ring-shaped protrusion is provided for overcoming the engagement. Further, a ratchet structure or the like is provided between the inner surface of the fixing ring 35 of the cap 30d and the fixing ring engaging portion 28 of the spout 20b so that the fixing ring 35 cannot reversely rotate when the cap 30d is opened. Configured.
By providing the pill fur proof structure as described above between the cap 30d and the spout 20b, when the cap 30d screwed to the spout 20b is rotated and removed, the fixing ring 35 is poured. Only the cap portion is fixed and remains on the outlet 20b side, and the detachable connecting portion 36 is cut and removed. When the cap is resealed, the gap between the lower end of the cap peripheral wall 32 and the fixing ring 35 is removed. Since a gap is formed in the opening, it is possible to identify opening at a glance.

As described above, in the caps shown in FIGS. 5 to 8, the finger-hanging protrusions 34 are different from each other but are shown as plate-like protrusions, but are not limited to the plate-like protrusions. Or a protruding portion such as a spherical shape.
Also, the caps 30a to 30d as shown in FIGS. 5 to 8 can be easily manufactured by plastic injection molding, similarly to the spouts 20a and 20b.

Next, FIG. 1 and FIG. 2 are front views showing the configuration of an embodiment of a bag with a plug according to the present invention, respectively, and the bag with a plug 100 shown in FIG. Such gusset pouch type bags are heat-sealed with the side edges (4a, 4b), (4c, 4d) at the front and rear edges of the left and right gussets 3a, 3b. It can be made in two ways.
One method is a method of making a bag by forming both left and right gusset portions 3a and 3b using a wide one-piece roll-shaped laminated film 1 in the same manner as a normal gusset pouch, Another method uses, for example, a four-piece roll laminate film of front and rear wall laminate films and left and right side laminate films, respectively, between the left and right sides of the front and rear wall laminate films. The laminated film is inserted and folded inward, and the left and right edges are heat sealed with side seals (4a, 4b), (4c, 4d) to form left and right gussets 3a, 3b. It is a method to do.

Hereinafter, the bag 100 with a stopper will be described as a bag made by the former method for convenience.
Using wide laminated film 1, the left and right sides are folded back so that the sealant layer is inside, and gusset portions 3 a, 3 b having folded fold-like folded portions 2 a, 2 b are formed inside, and the folded sides The end portions of the laminated film 1 are overlapped on one side, and the end edges of the front, rear, left and right corners including the overlapped portion are heat sealed with side seal portions (4a, 4b), (4c, 4d). Thus, a main body portion of the tubular folded bag 100 is formed.

And in the center part of the upper part of the bag 100, the spout 20a having the structure shown in FIGS. 3A and 3B is used as the spout 20 and the adhesive base 22 is interposed between the front and rear laminated films 1. It is inserted and attached by thermal bonding in the region of the upper seal portion 6, and both sides thereof are heat-sealed by the upper seal portion 6 and sealed.
In addition, a cap 30a having the configuration shown in FIGS. 5A and 5B is attached to the opening of the spout 20 as a cap 30 by screwing to the screw portion 24. In this case, the bag 100 is a gusset pouch-type bag, and the contents can be filled from the unsealed bottom seal portion 5a. Therefore, when the spout 20 is attached to the bag 100, the cap 30 is previously attached. The spout 20 can be attached by being thermally bonded to the bag 100 in a state in which the spout 20 is screwed and attached to the screw portion 24 of the spout 20.
Therefore, the bottom seal portion 5a is an unsealed opening before filling the contents, and is heat sealed after filling the contents from this portion.

  In addition, in the bag 100 with a stopper shown in FIG. 1, the spout 20a having the structure shown in FIGS. 3A and 3B is attached as the spout 20 and the cap 30 is the same as that shown in FIG. (B) Although shown in the example which attached the cap 30a of the structure shown to (b), as the cap 30, you may attach cap 30b, 30c of the structure shown in the said FIG. 6, FIG. When a pilfer proof structure is provided between the spout and the cap, as described above, the spout 20 is, for example, the spout 20b having the structure shown in FIG. 26 may be omitted, and the cap 30d having the configuration shown in FIG.

By adopting the configuration as described above, since the main body of the bag 100 with a stopper is formed of a gusset pouch type bag made of a laminated film, the empty bag can be folded flat and is not bulky. In addition, it can be efficiently stored and transported, and can contribute to volume reduction of waste even when discarded after use.
And the filling of the contents can be easily filled from the bottom opening (the part of the unsealed bottom seal part 5a) which is greatly opened. After filling, the gusset parts 3a, 3b on both sides are folded inward, The bottom seal portion 5a can be sealed by heat sealing.
The cap-filled bag 100 filled with the contents has the gusset portions 3a, 3b on both sides of the trunk portion widened back and forth, and the edge portions at the four corners of the side portions are side seal portions 4a, 4b, 4c, 4d. Because it is heat-sealed, there is a reinforcing effect, the barrel is a solid square tube, and the bottom can also be formed into a flat rectangular shape, improving self-sustainability, facilitating handling, and Since it is a rectangular tube, it has a good appearance and can be packaged compactly for its capacity.

When the filled contents are taken out, the spout having the configuration shown in FIGS. 3A and 3B and the outlets shown in FIGS. Since the cap of the structure shown is attached, by rotating the cap 30 and removing it, the spout 20 is opened, and the contents can be poured out in small quantities or all together.
Further, when the cap 30 is removed, a pair of plate-like protrusions 34 for protruding fingers are provided on the outer surface of the peripheral wall 32 so that the cap 30 can be turned with the fingers hooked on these portions. By moving the cap 30, the cap 30 can be easily removed with a small force even when the cap 30 has a small diameter.
Even when a part of the contents is used and the rest is stored, the cap 30 is a screw type cap, so it has excellent resealability, and since the bag 100 has self-supporting properties, until the next use. It can be stored safely.

  The bag 200 with a cap shown in FIG. 2 is a bag made of a main body portion in a standing pouch form, and the bottom portion is placed between the lower portions of the laminated film 1 on the front and rear wall surfaces in accordance with a normal method. In this case, a semicircular bottom film cutout portion 8 is formed in the vicinity of the lower ends of both sides of the bottom film that is folded inwardly. 8 is provided, and the gusset portion 3c is formed by heat-sealing with a bottom-shaped bottom seal portion 5b that is concave in a curved line from the inside to the center. Moreover, the trunk | drum of the bag 100 is formed by heat-sealing the both-sides edge part of the laminated film 1 of the front and back wall surface by the side part seal parts 4e and 4f.

In the central portion of the upper portion of the bag 200, the spout 20a having the configuration shown in FIGS. 3A and 3B is provided as the spout 20 in the same manner as the cap-equipped bag 100 shown in FIG. The adhesive base portion 22 is inserted between the front and rear laminated films 1 and attached by thermal bonding in the region of the upper seal portion 6, and both sides thereof are also heat sealed and sealed by the upper seal portion 6. Yes.
In addition, a cap 30a having the configuration shown in FIGS. 5A and 5B is attached to the opening of the spout 20 as a cap 30 by screwing to the screw portion 24.
However, when the bag is a standing pouch type, such as the bag 200 with a cap, the cap 30 is also used as a filling port for the contents, so that the cap 30 is connected to the spout 20 after the contents are filled. It is attached.

  In the case of the cap-attached bag 200 shown in FIG. 2, the spout 20a having the structure shown in FIGS. 3A and 3B is attached as the spout 20 and the cap 30 is the same as that shown in FIG. 5 (a) and 5 (b), the cap 30a having the structure shown in FIG. 5 is attached. In this case, the cap 30b having the structure shown in FIGS. 6 and 7 is attached as the cap 30. May be. When a pilfer proof structure is provided between the spout and the cap, as described above, the spout 20 is, for example, the spout 20b having the structure shown in FIG. 26 may be omitted, and the cap 30d having the configuration shown in FIG.

By adopting the configuration as described above, since the main body portion of the bag with plugs 200 is formed of a standing pouch type bag made of a laminated film, the empty bag before and after use is not bulky. It can be efficiently stored and transported, and can be flattened for disposal after use, contributing to volume reduction of waste.
In addition, the cap-filled bag 200 filled with the contents has an excellent self-supporting property because the bottom portion and the trunk portion widen widely in the front and rear, and the leg portion by the bottom seal portion 5b is formed on the outer periphery of the bottom portion. In addition, it is easy to handle, excellent in appearance, and can be packaged compactly for its capacity.

And when using the filled content, since the said spout 20 and the cap 30 are attached to the upper part of the bag 200, when the cap 30 is rotated and removed, the spout 20 opens. The contents can be poured out in small quantities or all together.
Further, when the cap 30 is removed, a pair of plate-like protrusions 34 for protruding fingers are provided on the outer surface of the peripheral wall 32 so that the cap 30 can be turned with the fingers hooked on these portions. By moving the cap 30, the cap 30 can be easily removed with a small force even when the cap 30 has a small diameter.
Even when part of the contents is used and the rest is stored, the cap 30 is a screw-type cap, so it has excellent resealability, and since the bag 200 has self-supporting properties, until the next use. It can be stored safely.

  Next, as the laminated film used for the bag with a cap of the present invention, a laminated film mainly composed of plastic, and a laminated film in which a sealant layer is laminated on the innermost layer is used, but is not particularly limited. Laminated films having various configurations can be used depending on use conditions such as the contents to be filled and the presence or absence of heat treatment after filling the contents.

In a simple configuration, it can be configured by laminating a sealant layer on the base film layer, but depending on the required performance, water vapor and other layers can be used as an intermediate layer between the base film layer and the sealant layer. The gas barrier layer, the light shielding layer, the strength improving layer, and the like can be laminated.
Each of the base film layer, the intermediate layer, and the sealant layer may be formed as a single layer, or may be formed by laminating a plurality of layers.

In addition to the biaxially stretched polypropylene film, the base film layer includes a biaxially stretched polyester film such as a biaxially stretched polyethylene terephthalate film or a biaxially stretched polyethylene naphthalate film, nylon 6, nylon 66, MXD6 (polymetaxylylene). A biaxially stretched polyamide film such as adipamide) can be preferably used.
These may be used singly or may be used by combining a plurality.

In the case where the intermediate layer is a gas barrier layer, the intermediate layer includes a film of saponified ethylene / vinyl acetate copolymer (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), aluminum foil, or , Biaxially stretched nylon film (ON film), biaxially stretched polyethylene terephthalate film (PET film), biaxially stretched polypropylene film (OPP film), etc. provided with vapor deposition layers such as silica, alumina, aluminum, and PVDC coating layers Can be used.
Among these, since the film provided with the aluminum foil or the aluminum vapor deposition layer is opaque, it can also serve as a light shielding layer.
Moreover, when making an intermediate | middle layer into a strength improvement layer, either of the said base film may be additionally laminated | stacked suitably, and a biaxial stretching high density polyethylene film etc. can also be laminated | stacked also as a moisture-proof layer.
A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the base film layer and the intermediate layer.

The innermost sealant layer includes low-density polyethylene (LDPE) and linear low-density polyethylene (L / LDPE), as well as ethylene / α-olefin copolymers, ethylene / vinyl acetate copolymers, and ethylene / acrylic acid copolymers. A polymer, an ethylene / acrylic acid ester copolymer, polypropylene or a copolymer thereof can be used.
Lamination of the sealant layer can be performed by forming the above resin into a film and laminating by dry lamination method or extrusion lamination method, or by laminating the above resin by extrusion coating, etc. In the case where the content easily penetrates into the sealant layer, it is preferably laminated by a dry lamination method having excellent adhesive strength.

Next, the manufacturing method of the bag with a stopper of this invention is demonstrated easily.
As described above, the bag with a plug of the present invention is a laminated film-made bag with a plug that seals and wraps a fluid content such as a liquid, and the plug is made of a plastic molded body. The spout is composed of a spout and a cap that is screwed onto the spout. The spout has at least a cylindrical tube portion as a center and a threaded portion for mounting the cap on the outer periphery of the tip end side. The intermediate portion has one or more flange portions, and the base portion has a cross section having a width larger than the diameter of the cylindrical portion, and has a hook-shaped adhesive base portion. The cap is attached to the bag by thermal bonding between the outer surface and the inner surface of the bag, and the cap has at least a top plate and a peripheral wall continuously suspended from the top plate, and an inner peripheral surface of the peripheral wall A screw portion that is screwed into the screw portion of the spout is provided, and the cap The outer surface of the bag is basically provided with a finger hook projection for facilitating opening and closing by rotation of the cap, and the shape of the main body of the bag is not particularly limited. In addition to flat bags such as a three-side seal type, a four-side seal type, and a pillow type, any bag having a self-supporting type such as a standing pouch type or a gusset pouch type can be used.

  Therefore, depending on the shape of the main body of the bag to be used, use a bag making machine for each shape, and add a thermal bonding device that heat-bonds the spout to some inner surface such as the upper part of the bag. By attaching or preparing separately, a bag with a cap can be manufactured by any method, whether in-line with a bag, or off-line.

Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.
A bag with a cap having the configuration shown in FIG. 2 was produced with the following materials and dimensions to obtain a bag with a cap of Example 1.
(1) Material of a bag with a stopper Structure of laminated film 1 for wall surface (outside) Biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) (thickness 12 μm) / adhesive / aluminum foil (thickness 9 μm) / adhesion Agent / biaxially stretched nylon film (hereinafter referred to as ON film) (thickness 15 μm) / adhesive / linear low density polyethylene film (hereinafter referred to as L / LDPE film) (thickness 100 μm)
Composition of laminated film for bottom surface (outside) PET film (thickness 12 μm) / adhesive / aluminum foil (thickness 9 μm) / adhesive / ON film (thickness 15 μm) / adhesive / L / LDPE film (thickness 70 μm)
The above-mentioned films were bonded together by a dry lamination method, and the adhesive between the films was a two-component curable polyurethane adhesive for dry lamination.
As the spout 20, a spout 20 b having the structure shown in FIG. 4 (however, the clogging prevention 26 is not provided) is produced by injection-molding high-density polyethylene (hereinafter referred to as HDPE). The inner diameter of the part was 11 mm), and the cap 30 was prepared by injection-molding a cap 30d having the configuration shown in FIG.
(2) Dimensions of bag body The bag had a total width of 160 mm, a total length of 220 mm, and a folding length of the bottom gusset portion 3c of 45 mm.
[Comparative Example 1]

  In the configuration of the bag with a cap of the first embodiment, only the cap of the spout is removed from the configuration of the cap 30d shown in FIG. 8 by removing the finger hanging protrusions 34, 34 provided on the outer surface of the peripheral wall 32, A bag with a stopper of Comparative Example 1 was fabricated in the same manner as in Example 1 except that the cap had a configuration in which only the vertical ridges were provided on the outer surface of the peripheral wall 32.

(Test and results)
In order to evaluate the cap-attached bags of Example 1 and Comparative Example 1 produced as described above, each cap-attached bag was filled with about 800 ml of liquid shampoo as its contents from its spout, and then each cap was filled. And the bag was sealed.
The packaging bodies made of the bags with caps of Example 1 and Comparative Example 1 produced as described above had stable self-supporting properties.
Next, when the first cap was removed in order to conduct a test in which the contents of each package were transferred in half by half and transferred to a bottle with a dedicated discharge pump, the cap-attached bag of Example 1 was removed. Then, since the projections 34, 34 for the finger hanging are provided on the cap, the diameter of the cap is relatively small, and the cap is provided with a fixed ring type pilfer proof structure. The cap could be easily rotated and removed with a small force. On the other hand, since the cap-attached bag of Comparative Example 1 does not have the finger-hanging protrusions 34, 34, a large force is required for the rotation of the cap. It was hard and difficult to remove for those who were weak, such as people and women.
Moreover, after removing the first cap and performing the first transfer of the contents, when resealed with each cap, each is a screw-type cap, so each of Example 1 and Comparative Example 1 Both the bag with a stopper can be easily and reliably resealed and can be safely stored until the next use.
Thereafter, in order to perform the second transfer, the cap was removed, and although it was lighter than the first removal, the cap of Comparative Example 1 was compared with the bag with a cap of Example 1. The cap-attached bag was inferior in terms of the ease of opening the cap tightly.

  The bag with a cap according to the present invention is particularly improved in ease of opening the cap, and its uses include, for example, various beverages, liquid seasonings, edible oils, other shampoos, conditioners, household liquid detergents, etc. It can be suitably used as a packaging container for taking out contents such as liquids in a small amount or refilling it into another container, and there is no particular limitation.

It is a front view which shows the structure of the 1st Example of the bag with a stopper of this invention. It is a front view which shows the structure of the 2nd Example of the bag with a stopper of this invention. It is a figure which shows the structure of an example of the spout used for the bag with a stopper of this invention, (A) is a front view, (B) is the top view seen from the lower side. It is a front view which shows the structure of another example of the spout used for the bag with a stopper of this invention. It is a figure which shows the structure of the 1st example of the cap of the spout used for the bag with a stopper of this invention, (A) is a front view, (B) is a top view. It is a figure which shows the structure of the 2nd example of the cap of the spout used for the bag with a stopper of this invention, (A) is a front view, (B) is a top view. It is a figure which shows the structure of the 3rd example of the cap of the spout used for the bag with a stopper of this invention, (A) is a front view, (B) is a top view. It is a front view which shows the structure of the 4th example of the cap of the spout used for the bag with a stopper of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Laminated | multilayer film 2a, 2b Fold-back part 3a, 3b, 3c Gusset part 4a, 4b, 4c, 4d, 4e, 4f Side seal part 5a, 5b Bottom seal part 6 Upper seal part 7 Bottom film return part 8 Bottom film cutout portion 20, 20a, 20b Spout 21 Tube portion 22 Adhesive base 23a, 23b, 23c Flange 24 Screw portion 25 Spout base portion opening 26 Closure prevention rib 27 Notch portion 28 Fixed ring engagement portion 30 Cap 31 Top plate 32 Peripheral wall 33 Concavity and convexity 34 Projection part for finger hook 35 Fixing ring 36 Separable joint part 100, 200 Bag with cap

Claims (4)

  In a bag with a cap for hermetically wrapping contents having fluidity such as liquid, the bag is formed by heat-sealing two or more laminated films having a sealant layer as an innermost layer. It consists of a spout formed by a plastic molded body and a cap that is screwed onto the spout, and the spout is for mounting a cap on the outer periphery of the tip end of at least a cylindrical cylindrical portion. The middle part has one or more flange parts, and the base part is formed into a shape having a flange-shaped adhesive base part having a width larger than the diameter of the cylindrical part. The cap is attached to the bag by thermal bonding between the outer surface of the adhesive base and the inner surface of the bag, and the cap has at least a top plate and a peripheral wall continuously suspended from the top plate, The inner peripheral surface is screwed into the thread portion of the spout With a screw portion is provided, the spout-equipped bags to the outer surface of the cap, characterized in that the projecting portion of the finger-hook to facilitate opening and closing by rotation of the cap is provided.   The bag with a stopper according to claim 1, wherein a pilfer proof structure is provided between the spout and the cap in the stopper.   The cap-attached bag according to claim 1 or 2, wherein a blocking prevention rib is provided below the adhesive base of the spout.   The bag with a cap according to any one of claims 1 to 3, wherein the bag is a standing pouch type or gusset pouch type bag.

Images