JP4932139B2 - Packaging bag - Google Patents

Description

  The present invention relates to a packaging bag in which a spout is provided at an end of a bag body made of a film.

Conventionally, as a flexible packaging bag made of a film such as a thermoplastic resin film, aluminum foil, or paper, as shown in FIG. 11, a spout 220 is formed at the upper end portion 211 of the bag body 210 formed by the films 202 and 202. A packaging bag 201 provided with is known.
In this type of packaging bag, as shown in FIGS. 9 and 10, Patent Document 1 discloses that a straw-shaped duct 130 is extended from the spout 120 toward the inside of the bag body 110 to discharge the contents. And a packaging bag 101 that facilitates suction.
Further, in Patent Document 2, at least a part of the outer peripheral surface of the overlapped soft sheet is bonded and sealed with an injection molding resin, and a through-pipe that penetrates the bonded seal portion is formed on the outer peripheral surface. A soft bag is described that is formed simultaneously with an injection-molded resin material.
Japanese Utility Model Publication No. 62-134826 JP 2002-136573 A

However, in the conventional packaging bag, since the film forming the bag body is flexible, the films 202 and 202 overlap and adhere to each other inside the bag body 210 as shown in FIG. The passage through which the contents pass is blocked (the state where there is a gap between the films 202 and 202 in FIG. 11, the closed state is shown in FIG. 12), and it becomes difficult to discharge and suck any more. is there.
As shown in FIGS. 9 and 10, in the case of the packaging bag 101 extending the straw-shaped pipe line 130, the contents are easily sucked through the pipe line 130, but the film forming the bag body has wrinkles, A gap is formed between the straw-shaped pipe line 130 and the film, and the contents cannot be discharged efficiently. In addition, when the contents include solid matter, the solid matter is clogged in the pipe line 130, the contents remain, and further, if the pipe line 130 is rubbed against the inner surface of the bag main body 110, the bag main body 110 is scratched from the inside. There is concern about the possibility of sticking.
Furthermore, when the packaging bag is tilted when discharging, the packaging bag may be bent due to the weight of the spout, and the discharging operation may not be smooth.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the packaging bag which is easy to discharge | emit and suction the contents, is excellent in shape retention property and self-supporting property, and is hard to damage the inside of a bag main body. .

In order to solve the above-mentioned problem, the present invention is a packaging bag in which a spout is joined at a joining base portion thereof at an end portion where films of a bag main body constituted by a film are welded, and the spout is It has a pair of extension parts extending from the joint base part by 2 cm or more along the outer surface of the bag body, and at least a part of which is fixed to the outer surface of the bag body. It is rod-shaped or plate-shaped, and the spout and the pair of extending portions are integrally formed from a thermoplastic resin , and the pair of extending portions are respectively on different surfaces of the bag body facing each other. Provided is a packaging bag which is fixed and opposed to each other so as to sandwich the bag body via a path through which the contents pass.
In the packaging bag of this invention, it is preferable that the said extension part has a ditch | groove extended along the extension direction of this extension part in the inner surface which is a surface in the side which contacts the outer surface of a bag main body.
Further, the present invention is a packaging bag in which the spout is joined at the joining base portion to the end portion where the films of the bag main body constituted by the film are welded, and the spout is connected to the joining base portion from the joining base portion. It has a pair of extending portions that extend 2 cm or more along the outer surface of the bag body, and at least a part of which is fixed to the outer surface of the bag body, and these extending portions are integrated with the spout And the pair of extending portions are fixed to different surfaces of the bag body opposite to each other, and are opposed to each other so as to sandwich the bag body through a path through which the contents pass, Provided is a packaging bag characterized in that the extending portion has a concave groove extending along the extending direction of the extending portion on the inner surface which is a surface in contact with the outer surface of the bag body.
In the packaging bag of the present invention, it is preferable that the extending portion is fixed to the bag body by welding.
Moreover, the packaging bag of this invention WHEREIN: It is preferable that the said spout and the said extension part were joined and adhered to the said bag main body at the time of those shaping | molding.
In the packaging bag of the present invention, it is preferable that the bag body is sealed obliquely from the vicinity of both sides of the splicing joint base to an appropriate position on the side end of the bag body.
In the packaging bag of the present invention, the bag body is preferably a self-supporting packaging bag.

According to the present invention, since the spout has a pair of extending portions extending along the outer surface of the bag body, the shape retaining property and the self-supporting property of the bag are improved, thereby configuring the bag body. It is possible to prevent adhesion between films and generation of wrinkles on the film, to secure a path through which the contents pass, and to prevent the packaging bag from being blocked. Since the extending portion is provided outside the bag body, an increase in residual liquid due to the entanglement of the contents and damage inside the bag body are suppressed.
When the extending part has a concave groove extending along the extending direction of the extending part on the surface in contact with the outer surface of the bag body, the shape of the inner surfaces of the extending parts facing each other is a straw shape or a funnel shape Since the shape is formed and the shape of the portion around the spout of the bag body is fixed to a shape that swells along the inner surface of the extending portion, a wider path for the contents can be secured.
When the upper end of the bag body is sealed obliquely from the vicinity of both sides of the splicing joint base to the appropriate position of the side end of the bag body, the contents can be prevented from remaining at the corner of the bag body. Is more preferable.
Further, when the packaging bag is tilted at the time of discharging, the packaging bag can be prevented from being bent by the weight of the spout, and the discharging operation can be performed smoothly. In particular, when a self-supporting packaging bag such as a standing pouch or a gusset bag having self-supporting properties is used as the bag body in the present invention, the film directly under the spout bends even if the contents are accommodated halfway, It won't bow, and it has excellent independence.

The present invention will be described below with reference to the drawings based on the best mode.
FIGS. 1-6 is drawing which shows the packaging bag of the 1st example of this invention, FIG. 1 is a front view, FIG. 2 is a side view which shows the state which expanded the packaging bag, FIG. 3 is a packaging bag. FIG. 4 is an enlarged cross-sectional view of the vicinity of the spout along the line XX of FIG. 3, and FIG. 5 is an enlarged view of the vicinity of the spout along the line YY of FIG. 6A is a cross-sectional view showing a state where the packaging bag is inflated, and FIG. 6B is a cross-sectional view showing a state where the packaging bag is deflated.

As shown in FIGS. 1-6, the packaging bag 1 of this embodiment arrange | positions the bottom film 3 folded in half between a pair of trunk | drum films 2 and 2, the upper end part 11, the both-sides end part 12, 12 is a standing pouch having a self-standing property in which the bag body 10 is constructed by welding at the lower end portion 13 and the lower end portion 13.
A spout 20 is provided at the upper end 11 of the bag body 10. The spout 20 has a joining base portion 22 joined to the bag body 10 and a cylindrical portion 21 protruding outward from the bag body 10. A cap (not shown) for sealing the opening 23 of the spout 20 can be detachably attached to the cylindrical portion 21 by fitting with a screw provided on the outer periphery of the cylindrical portion 21 or the cylindrical portion 21. It is like that.
Furthermore, in the packaging bag 1 of the present embodiment, a pair of extending portions 25, 25 that extend along the outer surface of the bag body 10 from the joint base portion 22 of the spout 20 and face each other so as to sandwich the bag body 10. However, it is formed integrally with the spout 20. The extending portion 25 is at least partially fixed to the outer surface of the bag body 10. In order to further exhibit the effect of improving the shape retention, it is preferable that the extending portion 25 is fixed to the outer surface of the bag body over the entire length in the extending direction.

Examples of the films 2 and 3 constituting the bag body 10 include polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), polyester, polyamide, adhesive polyolefin, cyclic polyolefin, and polybutylene. The thermoplastic layer is the innermost layer (sealant), and the base material is nylon, ethylene-vinyl alcohol copolymer, polyester, metal or inorganic compound vapor-deposited film, aluminum foil or other metal foil, preferably the outermost layer. A laminate film provided with a layer of thermoplastic plastic such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer (EVA), adhesive polyolefin, cyclic polyolefin, etc. can be used, but is not particularly limited thereto. .
As long as the body film 2 and the bottom film 3 can be joined to each other by welding or the like, the material and thickness thereof may be the same or different.

The thickness of the films 2 and 3 is preferably 20 to 900 μm. A thicker film is suitable in terms of shape retention and self-sustainability of the bag body, but a thinner film is preferred in terms of discardability, flexibility and lightness. A particularly desirable thickness in terms of moldability and handleability is in the range of 100 to 200 μm.
The films 2 and 3 can be provided with a gas barrier layer in order to provide a function of blocking a gas such as oxygen or water vapor as necessary. The gas barrier layer can be formed by metal foil such as aluminum foil, co-extrusion of an ethylene-vinyl alcohol copolymer (EVOH) layer or a polyvinylidene chloride resin layer, coating or laminating, vapor deposition of metal or ceramic, and the like.

  An oblique seal portion 15 is formed from the vicinity of both sides of the joining base portion 22 of the spout 20 at the upper end portion 11 of the bag body 10 to an appropriate position of the side end portion 12 of the bag body 10. The oblique seal portion 15 guides the contents contained in the bag body 10 to the spout 20 and facilitates discharge, and the corner portion 14 between the upper end portion 11 and the side end portion 12 of the bag body 10. It is more preferable because the contents can be prevented from remaining in the container.

  Here, the extending portion 25 has a circular arc shape as shown in FIGS. 6A and 6B, and is formed on the inner surface 26 that is a surface in contact with the outer surface of the body film 2 of the bag body 10. The groove portion 27 extends toward the spout 20 along the extending direction of the extending portion 25. In this case, as shown in FIG. 6B, even if the remaining amount of the contents is reduced and the packaging bag is squeezed, and the interval between the two drum films 2 and 2 facing each other is reduced, the drum film 2 The cross-sectional shape of the bag body 10 has a straw-like or funnel-like shape along the concave groove 27 of the extending portion 25, and the shape of the portion around the spout 20 of the bag body 10 swells along the inner surface 26 of the extending portion 25. Since it is fixed to the shape, it is possible to secure a wider path for the contents without causing wrinkles in the film.

Although the length of the extension part 25 from the joining base part 22 of the spout 20 depends on the size of the bag body, it is preferably about 2 to 3 cm or more. If the extending portion 25 is too short, the effects of the present invention may not be sufficiently obtained. It is desirable from the viewpoint of shape retention and independence that the extending portion 25 reaches the lower end portion 13 beyond the central portion of the bag body 10. Of course, the length of the extension part 25 may exist only in the upper part of the bag body 10 (between the central part and the upper end part 11 of the bag body 10).
The extension 25 is preferably thicker than the body film 2. A desirable thickness of the extending portion 25 is 0.1 mm or more.

  Examples of the material for forming the spout 20 and the extension portion 25 include polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), polyester such as polyethylene terephthalate (PET), nylon, and the like. Thermoplastics such as polyamide, adhesive polyolefin, cyclic polyolefin, and polybutylene can be used.

When the material of the spout 20 and the extending portion 25 is a thermoplastic resin that can be welded to the body film 2, the material can be directly welded to the body film 2. In this case, no adhesive or the like is required for fixing the spout 20, and the spout 20 can be securely fixed to the body film 2.
For example, when the outer surface of the body film 2 is polyethylene, it is preferable to use polyethylene as a molding resin for the spout 20 and the extending portion 25. When the outer surface of the body film 2 is stretched nylon, PET, or the like, the molding resin for the spout 20 and the extending portion 25 is preferably an adhesive resin such as an adhesive polyolefin modified with a carboxylic acid.

As a manufacturing method of the packaging bag of this embodiment, for example, the bag body 10 is formed by sandwiching and welding the bottom film 3 folded in two between the two body films 2, 2, and then the bag body 10 is inserted into an injection mold, and the spout 20 and the extension part 25 are shape | molded integrally. According to such a manufacturing method, the joining base portion 22 of the spout 20 and the inner surface 26 of the extending portion 25 are welded and joined to the bag body 10 along with the injection molding. In this case, since the spout 20 and the extension part 25 and the bag main body 10 are welded directly, both can be reliably joined with high strength, and the work process can be omitted, which is economical.
In this injection molding, for example, a cylindrical slide pin (not shown) is inserted between the end portions of the body films 2 and 2 facing each other, and the body films 2 and 2 are formed along the side surfaces of the slide pins. By forming the spout 20 and the extension 25 on the outside of the trunk films 2 and 2 in a curved state, the opening 23 and the extension 25 of the spout 20 along the shape of the side surface of the slide pin. A concave groove 27 in the inner surface 26 can be formed.

  The packaging bag according to the present embodiment directly forms the spout 20 and the extending portion 25 on the surface of the bag body 10, and uses a pre-formed one as the spout 20, and inserts the joining base between the body films 2 and 2. After joining by a method such as ultrasonic sealing, hot plate sealing, high frequency sealing, sealing with an adhesive, etc., when forming the extension portion 25, the bag body 10 is aligned by in-molding and molded in-mold. In addition, a method in which the extending portion 25 and the spout 20 are formed separately from the bag body 10 and these are joined to the bag body 10 by welding, adhesion, or the like in the same manner as described above may be employed. Is possible.

  The packaging bag can be stored and transported by filling the contents from the spout and sealing the spout with a cap or the like (not shown). The type of contents is not particularly limited and can correspond to various contents, but those having fluidity are particularly preferable. For example, powders, granules, liquids, viscous bodies, etc. are suitable. Can be accommodated.

According to the packaging bag of the present embodiment, the body films constituting the bag body are in close contact with each other by a pair of extending portions that are fixed and extended to the outer surface of the bag body, and the film has wrinkles. Generation | occurrence | production can be prevented, the path | route through which the content passes can be ensured, and obstruction | occlusion of a packaging bag can be suppressed. Even when the contents are poured out by inclining the bag, the direction of the spout is less likely to be bent, and leakage or spillage of the contents can be suppressed. Since the extension part is provided outside the bag body, even if it is a content containing solid matter, the solid matter is clogged, compared to a packaging bag with a spout where the pipe is extended inside. Increase in residual liquid and damage inside the bag body are suppressed. In addition, when a self-supporting packaging bag such as a standing pouch or a gusset bag having self-supporting properties is used as the bag body in the present invention, the film directly under the spout bends even if the contents are accommodated partway, It won't bow, and it has excellent independence.
Packaging bags that have been emptied after use can be easily reduced in volume by folding or rolling, so they are excellent in disposal and suitable for environmental protection.

Since the extending portion has a circular arc cross section, the inner surface of the extending portion has a concave groove shape, and the cross-sectional shape of the body film surrounded by the both extending portions is fixed in a straw shape or a funnel shape. For this reason, since the shape of the part around the spout of the bag body is fixed to a shape that swells along the inner surface of the extending portion, a wider path for the contents can be secured.
The slant seal part is formed from the vicinity of both sides of the spout joining base at the upper end of the bag body to the appropriate position on the side edge of the bag body, so that the discharge of the contents is guided and the contents at the corner of the bag body It is possible to prevent an object from remaining, which is more preferable.

Next, a second embodiment of the packaging bag of the present invention will be described with reference to FIGS.
FIG. 7 is a front view showing the packaging bag according to this embodiment, and FIG. 8 is a perspective view showing a state where the packaging bag of FIG. 7 is inflated. 7 and 8, the same reference numerals as those used in FIGS. 1 to 6 indicate the same or similar configurations as those of the above-described embodiment, and redundant description is omitted.
The bag body 10 of the packaging bag 1 according to the present embodiment has a pair of side wall portions that are disposed between a pair of flat surface portions 2a and two flat surface portions 2a that face each other and are folded inwardly of the bag main body 10. It is a gusset bag consisting of four sides with 2b.

  Furthermore, the packaging bag 1 of the present embodiment has a pair of extensions in which the spout 20 is extended with at least a part thereof being fixed to the outer surface of the bag body 10 in the same manner as the packaging bag of the first embodiment. Parts 25 and 25. The extension part 25 is provided facing each other so as to sandwich the bag body 10 from the joining base part 22 of the spout 20 as in the case of the packaging bag of the first embodiment. In the packaging bag 1 of the present embodiment, the spout 20 and the extending portion 25 can be provided in the same manner as in the packaging bag of the first embodiment. Also in this case, by providing the extending portion at the spout as described above, the same operations and effects as the packaging bag of the first embodiment can be obtained.

Although the present invention has been described based on the preferred embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present invention. .
For example, the aspect of the bag body of the packaging bag is not particularly limited. The present invention is not limited to the standing pouch shown in FIG. 1 and the like, the gusset bag shown in FIG. It is also possible to apply to.
Also, the number of extending portions is not necessarily one, and may be plural. Furthermore, the shape of the extending portion is not limited to a single rod shape, and may be branched in the middle or may be a plate shape.

In the packaging bag of this invention, the frame (not shown) extended from the joining base part of a spout along the upper end part and side edge part of a bag main body can also be formed. This further improves the independence of the packaging bag and makes it difficult to bend in the middle of the bag. Even when the remaining amount is low, tilt the bag to pour out the contents or stand the bag. Can be easily prevented, and leakage and spillage of the contents can be suppressed.
The frame may be formed by injection molding integrally with the spout and the extension part, or a part of the spout, the extension part, and the frame is previously molded and the other part is molded. In doing so, it may be integrated with in-mold molding by aligning with a previously molded one in the mold.
The frame body can also be attached so as to cover the outer surface of the end portion of the bag body. In this case, the bonding strength of the end portion of the bag body can be further reinforced, which is more preferable.

Examples of the present invention will be described below.
<Example 1>
In this example, a packaging bag 1 as shown in FIG. 1 was manufactured. As the body film 2 of the bag body 10, a three-layer multilayer film laminated with unstretched polyethylene (thickness 60 μm) / biaxially stretched nylon (thickness 15 μm) / unstretched polyethylene (thickness 60 μm) was used. Further, as the bottom film 3, a two-layer multilayer film in which biaxially stretched nylon (thickness 15 μm) / unstretched polyethylene (thickness 100 μm) was laminated was used. A linear low density polyethylene resin is used as the injection molding resin, the bag body 10 is inserted into an injection mold, and a spout made of a thermoplastic resin is formed on the outer surface and the upper end portion 11 of the bag body 10 by injection molding. 20 and the extension part 25 were integrally molded. The packaging bag 1 which concerns on this invention was manufactured as mentioned above.
The resulting packaging bag 1 has a pair of extending portions 25 formed integrally with the spout 20 to prevent the body films 2 and 2 from coming into close contact with each other and to close the bag. It was a packaging bag with excellent pouring properties. Moreover, by providing the extension part 25, it was easy to grasp and was excellent also in independence.

<Example 2>
In this example, a packaging bag 1 as shown in FIG. 7 was manufactured. As the plane part 2a and the side wall part 2b of the bag body 10, a two-layered multilayer film laminated with biaxially stretched nylon (thickness 15 μm) / unstretched polyethylene (thickness 100 μm) was used. Adhesive polyolefin resin is used as the injection molding resin, the bag body 10 is inserted into the injection mold, and the outer surface and the upper end portion 11 of the bag body 10 are extended with the spout 20 made of a thermoplastic resin by injection molding. The protruding portion 25 was formed integrally. The packaging bag 1 which concerns on this invention was manufactured as mentioned above.
The resulting packaging bag 1 has a pair of extending portions 25 formed integrally with the spout 20 to prevent the body films 2 and 2 from coming into close contact with each other and to close the bag. It was a packaging bag with excellent pouring properties. Moreover, by providing the extension part 25, it was easy to grasp and was excellent also in independence.

  The packaging bag of the present invention can be used for packaging various articles such as powders, granules, liquids, and viscous bodies.

It is a front view which shows the packaging bag which concerns on the 1st form example of this invention. It is a side view which shows the state which expanded the packaging bag of FIG. It is a perspective view which shows the state which expanded the packaging bag of FIG. It is sectional drawing which expanded the spout periphery along XX of FIG. It is sectional drawing to which the spout periphery around the YY line of FIG. 3 was expanded. (A) It is a cross-sectional view which shows the state which expanded the packaging bag of FIG. (B) It is a cross-sectional view which shows the state which the packaging bag of FIG. 1 deflated. It is a front view which shows the packaging bag which concerns on the 2nd form example of this invention. It is a perspective view which shows the state which expanded the packaging bag of FIG. It is a partial notch front view which shows an example of the packaging bag which has the conventional straw-shaped pipe line. It is a longitudinal cross-sectional view which shows the packaging bag of FIG. It is sectional drawing which shows an example of the spout periphery of the conventional packaging bag. It is sectional drawing which shows an example of the state which the packaging bag obstruct | occluded.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Packaging bag, 2 ... Film (body film), 3 ... Film (bottom film), 10 ... Bag main body, 11 ... Upper end part, 12 ... Side end part, 15 ... Diagonal seal part, 20 ... Spout, 22 ... Joint base part of spout, 25 ... extension part, 26 ... inner surface of extension part, 27 ... concave groove.

Claims (7)

A packaging bag in which the spout is joined at its joining base at the end where the films of the bag body composed of films are welded together,
The spout has a pair of extending portions extending from the joining base portion by 2 cm or more along the outer surface of the bag body, and at least part of which is fixed to the outer surface of the bag body,
These extending portions are rod-shaped or plate-shaped, and the spout and the pair of extending portions are integrally formed from a thermoplastic resin , and the pair of extending portions are respectively the bag body. A packaging bag, which is fixed to different surfaces facing each other and opposed to each other so as to sandwich the bag body through a path through which the contents pass.   The packaging bag according to claim 1, wherein the extending portion has a concave groove extending along an extending direction of the extending portion on an inner surface that is a surface in contact with the outer surface of the bag main body. . A packaging bag in which the spout is joined at its joining base at the end where the films of the bag body composed of films are welded together,
The spout has a pair of extending portions extending from the joining base portion by 2 cm or more along the outer surface of the bag body, and at least part of which is fixed to the outer surface of the bag body,
These extending portions are formed integrally with the spout, and the pair of extending portions are fixed to different surfaces of the bag body that are opposed to each other, through a path through which the contents pass. Facing each other so as to sandwich the bag body,
The packaging bag, wherein the extending portion has a concave groove extending along an extending direction of the extending portion on an inner surface that is a surface in contact with the outer surface of the bag main body. The packaging bag according to any one of claims 1 to 3, wherein the extending portion is fixed to the bag body by welding. The packaging bag according to any one of claims 1 to 4 , wherein the spout and the extending portion are joined and fixed to the bag body at the time of molding. The packaging bag according to any one of claims 1 to 5 , wherein the bag body is sealed obliquely from the vicinity of both sides of the splicing base of the spout to an appropriate position on the side end of the bag body. Packaging bag according to any one of claims 1 to 6, characterized in that said bag body is a self-supporting packaging bag.

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