JP2002019790A - Self-standing bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a self-standing bag which has the three-dimensional bag shape similar to a bottle and the self-standing property, and is excellent in preserving property of a content and the shape-keeping property of a spout, excellent in the service aptitude such as carriage and transfer of the content even when the capacity is large, free from any folding wrinkles in a barrel, and excellent in appearance. SOLUTION: This self-standing bag 100 has upper and lower gussets 6 and 7 is formed in a shape so that both sides thereof are sealed by side seal parts 9 and 9. The upper gusset 6 is as long as or shorter than the lower gusset 7, a projecting part 14 with an outer periphery thereof heat-sealed is provided on an upper side of one (forward) pleat-like part out of the forward and rear pleat-like parts of the upper gusset 6, and a narrow spout 10 is provided on a part of the projecting part 14. An extension part 15 having a hole 18 for a handle of the bag or for suspension is provided on the upper side of one pleat-like part by extending either film, and the lower gusset 7 is heat-sealed by a bottom seal part 8 of a shape for providing the self-standing property such as a boat bottom shape.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-supporting bag used for hermetically packaging not only a liquid material but also a fluid content such as powder or granule.
At the same time it has a cylindrical shape similar to a vertically long three-dimensional container, has self-supporting, has a narrow width spout and a hole for handle or hanging of the bag at the top, and after filling the contents The present invention relates to a self-supporting bag which is excellent in form stability and can be suitably used not only as a bag for ordinary use but also as a bag for refilling.

[0002]

2. Description of the Related Art Conventionally, in addition to various liquid detergents, cleansers, softeners, emulsion pastes, etc., various beverages, liquid seasonings such as soy sauce, sauces, mentsuyu, etc., liquid substances, powders such as milk powder, cocoa, etc. Was mainly filled in containers having shape retention, such as plastic bottles, glass bottles, and metal cans, distributed and used, and used containers were discarded. On the other hand, there is also a problem of waste disposal, and these containers are being sorted, collected, and recycled after use. However, such shape-retaining containers have a strong tendency to consume resources, and the ratio of container cost to commodities cannot be ignored.

[0003] From such a viewpoint, there has been a demand for a lower-priced, simpler container such as a bag made of a soft packaging material such as a laminate film. Such a simple container can be used as a substitute for a shape-retaining container such as the plastic bottle, glass bottle, or metal can, or as a refill container used to refill a container such as a used bottle with the same contents. Can also be used. As such a simple container, for example, one using a standing pouch having autonomy as it is, or one provided with a narrow spout at the top of the standing pouch, and further, a spout of the spout In order to further stabilize the opening property and the shape retention property, there is an example in which a spout made of a plastic molded body is attached to the upper part of the standing pouch.

[0004] Such bags consume less material,
It is lightweight and can pack contents compactly, which saves resources and reduces logistics costs.It also has advantages such as easy disposal after use, especially above the standing pouch. The one provided with a spout made of a plastic molded body is easy to handle, and is excellent not only in performance but also in suitability for use.

[0005] However, in the case where a spout made of a plastic molded body is attached to the upper part of the above-mentioned standing pouch, it is necessary to prepare the spout separately, which is expensive in terms of cost, and the lamination for forming the bag itself. Since the film is thin and has low rigidity, the main body is inferior in shape retention.Especially, when the shape of the bag is a vertically long shape similar to a bottle, etc. At the position closer to the upper part from the part, wrinkles were generated inward from the side seal parts on both sides, and there was a problem that the appearance was inferior. And
As for the capacity of the bag, it is good if the capacity is relatively small.
When the capacity exceeds L, the bag size becomes large and the weight also becomes heavy, so that there is a problem in that it is troublesome to carry or to transfer the contents to another container.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to seal a liquid content such as a liquid material in a sealed package. It is a laminated film bag with excellent preservation of contents, light weight, not bulky, easy disposal after use, and even if the bag is self-supporting and has a large content, it is portable. It is easy to handle when transferring contents and contents to another container, and the opening of the spout is also good, the appearance is smart like a shape-retaining container such as a bottle, and after filling the contents It is an object of the present invention to provide a self-supporting bag with excellent form stability and excellent display effect at a store, which does not cause wrinkles or the like in the bag, and has high productivity.

[0007]

The above objects can be attained by the present invention described below. That is, in the invention described in claim 1, the upper and lower portions of the bag are inserted between the upper and lower portions of the front and rear wall films by folding the upper or lower film inward, respectively, and joining by heat sealing. In the bag formed in the form having a gusset part made of, the body portion is formed by heat-sealing the edges on both sides of the front and rear wall film with the side seal portion, the lower gusset portion, Heat-sealed with a seal pattern of a shape that gives independence, of the upper and lower gussets, the upper and lower folds of the upper gusset, the upper side of one of the folds, the film on both sides, i.e., facing the wall surface film A projection is provided extending from the top film, and a narrow width spout is provided on the projection, and films on both sides of the other fold-like portion, that is, wall flaps are provided on the upper side of the other fold. A self-sufficiency characterized in that an extension is provided by extending only one of the film and the upper surface film opposed thereto, and a hole for a handle or hanging is provided in the extension. Consists of bags.

The seal pattern having a shape that imparts independence for heat-sealing the lower gusset portion may be any seal pattern in which the inside is concavely concave from both sides toward the center. Further, an extension portion extending to a fold portion on a side different from the fold portion on which the protrusion portion of the upper gusset portion is extended extends the film on both sides, for example, heat-sealing both. Can also be provided,
In this case, if the capacity of the bag is relatively large, the thickness of the film on both sides will inevitably increase, so if a hole is provided in the extension and used for gripping or hanging the bag, Becomes excessively thick, and an extra film is used. Also, when providing a hole for a handle or a suspension in the extension, the durability of the blade of the punching device is reduced and the productivity and the production cost are increased. It is preferable that only one of the films is extended. The handle for the bag or the hole for hanging the bag is used for carrying the bag, or for transferring the contents to another container, and for inserting the fingers to facilitate holding the bag, or a hanging string. It is a hole for facilitating the lowering of the bag by hand through, for example, the shape and the number can be arbitrarily provided. Such a hole may be a completely cut-out hole, a hole partially provided with a connecting portion, or a hole formed by an intermittent cut line such as a perforated shape, which easily breaks through the finger. It may be a hole into which a hole can be inserted.

By adopting such a configuration, the self-supporting bag of the present invention can consume less material, is lighter and less bulky, and can be disposed of after use as compared with a shape-retaining container such as a plastic bottle. Processing becomes easy. The bag filled with the contents is easy to handle because the lower gusset portion and its seal pattern are provided with independence, and both the upper and lower portions of the bag are formed in a form having a gusset portion. As a result, the main body of the bag expands in a cylindrical shape, and the bag can be compactly packed for its capacity, thereby reducing distribution costs and display space at stores.

Further, of the gusset portions on the front and rear sides of the upper gusset portion of the bag, a protruding portion is provided on the upper side of one of the gusset portions by extending the films on both sides, and the protruding portion has a narrow width. A spout portion is provided, and on the upper side of the other fold-shaped portion, only one of the films on both sides thereof, that is, the wall film and the upper surface film opposed thereto, is extended to extend. And an extension is provided with a hole for a handle or a hanging hole.

Therefore, there is also a gusset at the top of the bag,
And, of the folds on the side where the extension is provided, of the folds on the front and rear sides, the upper part of the fold is sealed by heat sealing under the extension. The rigidity is increased, and in the case of a normal standing pouch type bag, the wrinkles generated from the side seals on both sides toward the inside from the middle part of the body of the bag toward the top are eliminated, The appearance and form stability of the bag are improved. Also,
The bag has a cylindrical main body and an outer shape similar to a shape-retaining container such as a bottle, and is smart, and has an excellent display effect at stores.

When the contents are transferred to another container, the spout is opened and the opening is inclined toward the mouth of the container so that the contents flow toward the opening,
Due to the internal pressure, the films on both sides of the upper gusset portion including the spout portion spread outward, and a funnel shape formed by the wall film and the upper surface film is formed with good shape retention at this portion. Therefore, the contents flow to the spout smoothly, and the contents can be safely and easily transferred to the end. At this time, one of the films on both sides, for example, a wall film is extended, and the extended portion is formed on the upper side of the fold portion on the side of the upper portion of the bag where the spout of the gusset portion is not provided. Is provided, and a hole for a handle or a suspension is provided in an extension thereof.For example, by inserting a finger into a hole for a handle, both the upper and lower parts of the bag can be held, and the bag is Even with a large capacity, the contents can be easily and safely and easily transferred.
Further, the handle for the bag or the hole for hanging the bag can be used for carrying the bag, so that the handling of the bag becomes easy.

[0013] In a second aspect of the present invention, the seal pattern having a shape for imparting independence of the lower gusset portion includes:
2. The self-supporting bag according to claim 1, wherein the inner side is a ship bottom-shaped seal pattern in which a center portion is lower and becomes higher toward both end portions.

By adopting such a structure, in addition to the operation and effect of the invention described in the first aspect, the bag filled with the contents has a bottom portion corresponding to the ship bottom shape seal pattern, for example. In the case of a ship bottom-shaped seal pattern in which the inside is formed of a curved line, the shape is an elliptical shape, and the inside is a straight shape with both sides rising straight from the bottom with a predetermined width to the outside with a slope. It spreads in a hexagonal shape, and in each case, the central part is greatly widened back and forth, and the legs are formed on the outer periphery of the bottom surface by the heat seal part, so that the self-sustainability of the bag can be further improved.

According to a third aspect of the present invention, the spout portion is provided on the upper side of one of the gusset portions of the upper gusset portion so as to extend the film on both sides and taper upward. The side edges of the spout are heat-sealed so that the inner line is connected by an inclined straight line from the base of the pleat to the upper part of the spout. 2. The self-supporting bag according to 2.

By adopting such a configuration, in addition to the operation and effect of the invention described in claim 1 or 2, the spout portion is lowered when transferring the contents filled in the bag to another container. The film on both sides of the upper gusset including the spout is spread outward by the internal pressure of the contents flowing into the spout by tilting the bag toward Is formed, but the funnel shape has no steps or bends in the middle and becomes a more regular pyramid shape, so its shape retention is improved,
The flow of the contents to the spout becomes smoother, and the contents can be safely and easily transferred to the end.

According to a fourth aspect of the present invention, in the upper and lower gusset portions of the bag, the folded length of the upper film inserted into the upper gusset portion is smaller than that of the lower film inserted into the lower gusset portion. The self-supporting bag according to any one of claims 1 to 3, wherein the self-standing bag is formed to have the same length as the folded length or smaller than the folded length of the bottom film.

Originally, the lower gusset portion of the bag is provided for providing the bag with a flat bottom surface to provide independence. The folding length of the bottom film inserted into the lower gusset portion is as follows. The width of the bottom wall film is set so that the bottom portion of the front and rear wall films spreads forward and backward appropriately. On the other hand, by inserting the upper surface film into the upper part of the bag and providing the gusset part, the upper part of the bag can be flattened back and forth similarly to the lower part. In this case, the folded length of the top film inserted into the upper gusset portion of the bag may be set to the same length based on the folded length of the bottom film inserted into the lower gusset portion, It can be set smaller or larger than the folded length of the bottom film.

Basically, for example, when the folded length of the top film is set to be the same as the folded length of the bottom film, the bag body becomes a parallel cylindrical shape, and the folded length of the top film is set to the bottom length. If the length of the film is smaller than the folded length, the upper part of the bag will be tapered and the spread in the front-rear direction will be smaller. Conversely, if the folded length of the top film is larger than the folded length of the bottom film Has a reverse tapered cylindrical shape in which the upper part of the bag expands in the front-rear direction.

However, in the self-supporting bag of the present invention, of the upper and lower gussets, the upper side of one of the folds, for example, the film on both sides thereof, that is, the wall film and the opposing wall. A projection is provided by extending the upper film to be formed, and a spout having a narrow width is provided at the projection. Such protrusions and spouts do not increase the outer perimeter of the bag itself, but result in the formation of one gusset of the gusset that is longer, increasing the spread of the upper part of the bag in the front-rear direction. Has the effect of

Further, the contents filled in the bag are, for example,
When transferring to another container, in the funnel-shaped part formed in the upper gusset part including the spout part, the top film is folded back length (more precisely, the sealing part) than the wall film. ), The funnel shape at the spout tends to be bent outward, and the transfer operation becomes unstable. This problem becomes more remarkable as the length of the turnover of the upper film of the upper gusset portion becomes longer. Therefore, in the self-supporting bag of the present invention, the folded length of the top film inserted into the upper gusset portion of the bag is the same as the folded length of the bottom film inserted into the lower gusset portion, or the folded length of the bottom film. Preferably, it is formed smaller than the length.

By adopting such a configuration, in addition to the functions and effects of the invention according to any one of claims 1 to 3, for example, the folded length of the upper surface film of the upper gusset portion can be reduced. When the self-supporting bag filled with the contents is formed to have a substantially uniform cylindrical body when the folded length of the bottom film of the portion is formed to be the same as the folded length of the bottom film, it is more similar to a shape-retaining container such as a bottle. It can be made smart shape. When the folded length of the top film of the upper gusset portion is smaller than the folded length of the bottom film of the lower gusset portion, the self-supporting bag filled with the contents is in the front-back direction of the upper portion of the bag. The spread is smaller than that of the lower part as a whole, the self-sustainability of the bag and the sense of stability are increased, and the spout is prevented from being bent outwardly in the funnel shape, so that the funnel shape effect can be more reliably obtained.

In the case where the folded length of the top film of the upper gusset portion is smaller than the folded length of the bottom film of the lower gusset portion, the length to be reduced is not particularly limited. , Several mm, a certain effect can be obtained. Therefore, it can be set arbitrarily in consideration of the reduction of the spread of the upper portion of the bag and the effect of preventing the funnel from being bent outward. For example, if the fold length of the top film is reduced to the maximum, the gusset will be folded with the heat-seal portion at the upper edge of the upper gusset, but even in this case, the upper part of the bag will be folded back and forth. The spread is only dependent on the films on both sides of the funnel-shaped part, but since the length of the wall film and the top film of the funnel-shaped part are the same, there is no tendency for the funnel-shaped part to bend outward, and Since the overlapping of the film in the upper gusset portion and the effect of improving the rigidity by the heat sealing portion are obtained, the wrinkles generated from the side of the bag toward the inside can be prevented, and the form stability of the bag can be prevented. Is improved.

According to a fifth aspect of the present invention, there is provided the self-supporting bag according to any one of the first to fourth aspects, wherein an opening means is provided at the spout.

As the opening means, for example, (a) means for providing an opening instruction line by printing or the like, and cut off the portion with scissors or the like; (b) a notch on the heat seal portion on the outer periphery of the bag. Means for tearing the notch as an opening start position, (c) laminating an easily tearable film such as a uniaxially stretched film so that the stretching direction and the tearing direction at the time of opening match to facilitate opening in a certain direction. Means for laminating in a film and tearing the laminated film in a bag, (d) means for tearing along a half-cut line formed by laser beam irradiation processing, (e)
There is a method in which an elongated and small scar group is formed at the end of the bag by a mechanical method, and the tear group can be easily torn from the scar group, and these opening means are selected or appropriately combined. be able to.

In general, one-shaped or V-shaped notches are often used, but the shape of the notch is not limited.
Any shape having a pointed portion in the tearing direction may be used. The half cut line is not limited to a continuous linear half cut line, but may be a perforated intermittent half cut line. Such a half-cut line may be one, but assuming that the tearing direction is shifted, a plurality of half-cut lines such as one each or two each on both sides of the center half-cut line, Alternatively, it may be provided in a shape converging with the center half-cut line.

As the opening means, various means as described above can be employed, but it is preferable to provide an opening instruction line at least at the opening position. The opening instruction line may be displayed in any form, such as a dotted line, a broken line, and a solid line, as well as characters and symbols, and can be easily provided by printing or the like.

By adopting such a configuration, in addition to the operation and effect of the invention described in any one of claims 1 to 4, it is possible to clearly indicate the opening position of the spout, so that there is no mistake and the desired An opening having a desired size can be accurately provided at the position. In addition, by using means such as a notch, a half-cut line, and lamination of a uniaxially stretched film in combination with the opening instruction line, the spout portion can be easily torn by hand without using tools such as scissors and opened. be able to.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention, such as a film used for a self-supporting bag of the present invention and a method for producing the self-supporting bag, will be described. First, the film used for the self-supporting bag of the present invention is mainly a laminated film mainly composed of plastic, but is not particularly limited, and is a known laminated film used for a packaging bag for contents such as liquid. Any of these can be used, and a suitable material can be freely selected and used according to the use conditions such as the type of contents to be filled and the presence or absence of heat treatment after filling. As a typical example of the configuration of the laminated film used for the self-supporting bag of the present invention, the following configuration is exemplified.

(1) ON film / adhesive / L·LDPE
Film (sealant layer) (2) ON film / adhesive / uniaxially or biaxially oriented H
DPE film / adhesive / L / LDPE film (sealant layer) (3) ON film / adhesive / uniaxially or biaxially oriented P
P film / adhesive / L / LDPE film (sealant layer) (4) ON film / adhesive / uniaxially or biaxially oriented P
P film / adhesive / aluminum foil / adhesive / LL
DPE film (sealant layer) (5) ON film (silica or alumina deposited layer) / adhesive / uniaxially or biaxially oriented HDPE film / adhesive / L / LDPE film (sealant layer) (6) ON film / anchor coat Layer / co-extrusion coat layer (HDPE layer / L-LDPE layer) (sealant layer is L-LDPE layer) (7) ON film / anchor coat layer / co-extrusion coat layer (HDPE layer / LDPE layer) / adhesive / L ・ LDP
E film (sealant layer) (8) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / L / LDPE film (sealant layer) (9) PET film / adhesive / aluminum foil / adhesive / ON film / adhesive / CPP film (sealant layer) (10) PET film / adhesive / ON film / adhesive /
Aluminum foil / adhesive / L / LDPE film (sealant layer) (11) PET film / adhesive / ON film / adhesive /
Aluminum foil / adhesive / CPP film (sealant layer) (12) PET film / adhesive / EVOH film / adhesive / ON film / adhesive / CPP film (sealant layer) Instead, various combinations of laminated films can be used.

In the above structure, the ON film is a biaxially stretched nylon film, the PET film is a biaxially stretched polyethylene terephthalate film, PP is polypropylene, L·LDPE is linear low density polyethylene, HDP
E is high density polyethylene, LDPE is low density polyethylene, CPP film is unstretched polypropylene film,
The EVOH film refers to a saponified ethylene-vinyl acetate copolymer film.

The adhesive between the film layers is usually used because the lamination is performed by a dry lamination method.
An adhesive for dry lamination such as a liquid-curable polyurethane-based adhesive can be used. In addition, the anchor coat is a kind of primer coat that is previously coated on the base film side in order to improve adhesiveness when laminating a resin by extrusion coating.

In the structure of the laminated film, when the ON film and the PET film are used for the outermost layer, they are used as a base film for imparting mechanical strength, heat resistance, printability, etc. to the bag, If you use
It is mainly used to reinforce mechanical strength. When a uniaxially stretched HDPE film or a uniaxially stretched PP film is used for the intermediate layer, the film is laminated so that the stretching direction coincides with the tearing direction at the time of opening the bag, thereby facilitating the tearing and the direction. Properties can be stabilized. When a biaxially oriented HDPE film or a biaxially oriented PP film is used for the intermediate layer, it is possible to increase the thickness of the laminated film, increase its rigidity and mechanical strength, and at the same time, decrease the water vapor permeability. it can.

An aluminum foil, a silica or alumina vapor-deposited layer, an EVOH film, etc. are laminated mainly to impart gas barrier properties. In addition to these, a metal vapor-deposited layer of aluminum or the like, polyvinylidene chloride A coating layer or a gas barrier material such as a polyacrylonitrile film may be laminated.

As the innermost sealant layer, L·LD
Although two examples of PE film and CPP film are given, L / LDPE film is excellent in heat sealing stability and content resistance, such as stress cracking resistance to surfactants, and CPP film is heat resistant. It has excellent low odor properties and is suitable for packaging of contents requiring these properties.

In the sealant layer, in addition to the above, depending on the contents to be filled, ethylene / α-olefin copolymer, ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / acrylic ester copolymer may be used. Polymers, ionomers, polyester resins and the like can also be appropriately selected and used.

In particular, an ethylene / α-olefin copolymer obtained by polymerization using a single-site catalyst such as a metallocene catalyst has a narrow molecular weight distribution and a stable copolymerization ratio, so that the low-temperature heat sealability and the like are low. Excellent in hot sealability, such as the self-supporting bag of the present invention, such as between the upper and lower gusset portion and the body seal portion, the sealant of a bag having a step due to a difference in film overlap in the heat seal portion. The layer is suitable because it can prevent the occurrence of pinholes due to missing seals. Further, by using the copolymer blended with an olefin-based elastomer, the heat fluidity of the sealant layer is improved, and the occurrence of pinholes due to the step or the like can be more effectively prevented.

The contents to be filled in the self-supporting bag of the present invention may be anything, such as foods and non-foods, as well as liquids, as long as they have fluidity such as powder or granules. In the case where contents that are easily oxidized such as oil are filled, an ultraviolet absorber can be kneaded into any one or a plurality of layers of the laminated film. Further, an ultraviolet absorbing agent may be mixed with a resin, and the ultraviolet absorbing layer may be provided by a coating method. One or two or more compounds selected from the following can be used as the ultraviolet absorber. In organic system, benzophenone system, benzoarizol system, salicylic acid system, organic nickel system, acrylonitrile system, monobenzoic acid system, oxalic acid anilide system, cyanoacrylate system, triazo system ultraviolet absorber, and inorganic system, titanium , Zinc, cerium and the like can be used.

Next, a method for producing a self-supporting bag of the present invention produced using the above-described laminated film will be described. The self-supporting bag of the present invention itself uses, for example, a conventional bag making machine for standing pouches (a bag making machine for single row bag making or a bag making machine for double row bag making). , A top film supply device, and a heat sealing device or a trimming device such as a protrusion, a spout portion, or an extension portion extending to the front and rear pleats of the upper gusset portion, or a handle provided on the extension portion. Bags can be easily manufactured by appropriately adding a punching device such as a hanging hole.

When heat sealing the gusset at the upper part of the bag, the protruding part extending from one of the folds, and the spout, the seal pattern differs between the front and rear folds. It is necessary to heat seal separately, but it is possible to make a bag without any problem by dividing into a plurality of sections and heat sealing. In particular, the extension that is provided to provide a hole for handle or suspension in the other fold of the upper gusset part extends only one side of the film, so the film on both sides is extended. Compared to the case of extension, the amount of film used can be reduced, and at the same time, the thickness can be adjusted to an appropriate thickness, so it is possible to use a punching type punching device such as a die set and reduce equipment costs. Productivity can be improved.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below more specifically with reference to the drawings. However, unless the present invention exceeds the gist,
It is not limited to the following drawings. Further, the same reference numerals are used for the parts having the same names in different drawings.

FIG. 1 is a front view showing the structure of a first embodiment of a self-supporting bag according to the present invention. FIG. 2 is a diagram showing the self-standing bag shown in FIG. It is a schematic side view which shows the shape at the time of it. The self-standing bag 100 shown in FIGS.
Is the upper and lower wall film 1, the front and rear two sides,
1 ′, an upper film or a bottom film is folded inward between the upper and lower portions, respectively. In the case of a top film, upper film cutouts 4, 4 are provided near the upper ends of both side edges, In the case of the bottom film, the bottom film notch 5 is provided near the lower end of both side edges.
5 is inserted into the top film folded portion 2 or the bottom film folded portion 3 and heat-sealed with a predetermined seal pattern to form a shape having gusset portions 6 and 7, and the body portion is formed of the wall film 1. 1 'is formed by heat sealing the side edges of both sides with side seal portions 9, 9.

In the above description, the vertical length of the upper gusset portion 6, that is, the folded length of the top film, is the same as the vertical length of the lower gusset portion 7, that is, the folded length of the bottom film. Is formed. The cutouts 4 on both sides of the upper film which are folded and inserted into the upper gusset 6 are necessary for stabilizing the shape of the bag. Differently, since it is not related to the independence of the bag, it can be omitted. This point is described in FIGS. 3, 5, 7, 9, and 11 below.
Autonomous bags 200, 300, 400, 500, 60 shown in FIG.
The same applies to 0.

The lower gusset portion 7 is heat-sealed by a bottom-shaped seal pattern in which the inner side is formed by a curved line, that is, a bottom seal portion 8, and the gusset portions on both front and rear sides of the upper gusset portion 6 are formed. One of the folds (the front side in FIG. 1) is provided with a protrusion 14 on the entire upper side thereof by extending the films on both sides, that is, the wall film 1 and the upper surface film opposed thereto. , This protrusion 1
4 are heat-sealed by the seal patterns of the shape in which the side seal portions 9, 9 are extended as they are, that is, the upper seal portions 11, 11, and the protruding portions 14. A cut line 16 for forming the spout 10 and notches 17 at both ends are provided at one corner (left side in FIG. 1) of the upper part of
The other gusset part (the rear side in FIG. 1) of the upper gusset part 6 has an inverted bottom-shaped seal pattern in which the inner side is depressed linearly inclining from both sides toward the center and horizontal at the center. In other words, the upper gusset part back side seal part 13
And an extension portion 15 is provided on the upper side of the fold portion by extending only one of the films (for example, the wall film 1 ′) out of the films on both sides. Is provided with a hole 18 for a bag handle.

The protruding portion upper seal portion 12 at the upper edge of the protruding portion 14 is used to heat-tightly seal the content after filling the content in order to use this portion as a filling port for the content. This point is different from the self-supporting bag 200 shown in FIGS.
The same applies to. Further, the hole 18 for the handle provided in the extension portion 15 can be a hole for hanging. In this case, for example, holes such as circles may be provided on both the left and right sides of the extension portion 15 to pass a string or the like, and the extension portion 15 may be lowered by hand.

Also, the spout 10 for pouring out the contents.
In this case, a cutting line 16 is provided at the upper corner of the protrusion 14 and notches 17 are provided at both ends thereof.
Although 17 is provided, a half-cut line by laser light irradiation or the like can be additionally provided along the cut line 16. Further, the position of the spout 10 is not limited to the upper corner, but may be provided at the center. In that case, for example, the protrusion upper seal portion 12
May be changed to a shape having a concave portion at the inner central portion, and the cutout line 16 may be provided from the upper side portion of the protruding portion 14 so as to cross the concave portion. As described above, the position and the shape of the spout can be appropriately designed according to the properties of the contents to be filled and the shape of the container to be transferred, particularly the size of the mouth.

By adopting such a configuration, since the self-supporting bag 100 is entirely formed of a laminated film, it is lightweight, not bulky, has good preservability of contents, and can be disposed of after use. Easy. Then, the self-supporting bag 100 filled with the contents has, for example, only the wall film among the films on both sides, on the upper side of the fold portion of the upper gusset portion 6 on the side where the spout 10 is not extended. The extended portion 15 is provided with a hole 18 for a handle of the bag, and the lower gusset portion 7 is heated by a bottom seal portion 8 of a ship bottom shape formed by a curved line on the inside. Since the seal is sealed, the lower cross section has an elliptical shape, and a ring-shaped leg is formed on the outer periphery of the bottom, so that it is excellent in self-sustainability and easy to carry and other handling.

Regarding the form of the bag after filling the contents, the bag 1
00, as described above, the upper gusset 6
Is formed in the same length as the vertical length of the lower gusset 7 (the length of the bottom film folded), so that the parallel cylindrical shape is formed. It is a body, it is compact for its capacity, does not take up space, and looks smart like a shape-retaining container such as a bottle,
Excellent display effect at stores. Further, in the upper gusset part 6, the folds on the rear side are formed by an upper gusset part rear side seal part 13 having an inverted bottom seal pattern.
Heat-sealed, and the front and rear pleats are provided on the upper film cutouts 4 provided near the upper ends on the left and right sides.
4, the reinforcing effect of the upper part of the bag is further enhanced, and in the case of a self-supporting bag having a normal shape, the self-standing bag is generated on both sides of the middle part of the body of the bag slightly upward. The generation of folding wrinkles is eliminated, the form stability is improved, and the appearance is further improved.

When transferring the filled contents to another container, the tip of the spout 10 is notched with the notch 17.
The spout 10 is opened by cutting along the perforation line 16 by using the opening, the opening is aligned with the mouth of the container, and the bag 100 is opened.
Is tilted, the contents flow to the spout, and the film on both sides of the spout 10, that is, the wall film 1 and the upper surface film opposed thereto are spread on both sides by the internal pressure, and the upper gusset 6 From the base to the opening of the spout 10, the funnel shape of the film on both sides is formed with good shape retention. Therefore, the contents flow smoothly to the spout, and the contents can be safely and easily transferred to the end.

When transferring the contents,
Even when the capacity of the self-supporting bag 100 is large, for example, the upper portion of the bag is held by inserting a finger into a handle hole 18 provided in the extension 15 thereof, and the lower portion of the bag is manually supported from below. Can be dispensed, so that the dispensing operation is easy and the transfer can be performed safely.

FIG. 3 is a front view showing the structure of a second embodiment of the self-supporting bag according to the present invention. FIG. 4 is a diagram showing the self-standing bag shown in FIG. It is a schematic side view which shows the shape at the time of it. The self-supporting bag 200 shown in FIGS.
Is the configuration of the self-supporting bag 100 shown in FIG.
The seal pattern of the gusset part 7 at the lower part of the bag, that is, the seal pattern of the bottom seal part 8 is changed to a ship bottom type seal pattern in which both sides rise straight from the bottom which is horizontal to the outside with a slope toward the outside. While changing and heat-sealing, the vertical length of the upper gusset portion 6 (the folded length of the top film) is larger than the vertical length of the lower gusset portion 7 (the folded length of the bottom film). It is configured so as to be smaller.

By adopting such a configuration, the self-supporting bag 200 has the upper and lower gusset portions in which the upper and lower gusset portions are almost symmetrical vertically and the inverted bottom shape (inverted). Since the bag is heat-sealed with the seal pattern (upper portion), when the bag is filled with the contents, the bag body in this case has a regular shape close to a hexagonal column, and the appearance is further improved. Further, since the folded length of the top film of the upper gusset part 6 is formed to be smaller than the folded length of the bottom film of the lower gusset part 7, when the contents are filled, the upper gusset part is formed. 6 is narrowed as a whole, and the independence and sense of stability of the bag are improved, and when the contents are poured out, the outward bending of the funnel shape formed in the spout portion is prevented. Thus, the funnel-shaped effect can be obtained more reliably, and it can be poured smoothly in a stable state. Except for the above changes, the configuration is the same as that of the self-supporting bag 100 shown in FIGS. 1 and 2, so that the same operation and effect as those described for the self-supporting bag 100 can be obtained.

FIG. 5 is a front view showing the structure of a third embodiment of the self-supporting bag according to the present invention. FIG. 6 is a diagram showing the self-standing bag shown in FIG. It is a schematic side view which shows the shape at the time of it. Self-standing bag 300 shown in FIGS.
Is the configuration of the self-supporting bag 200 shown in FIG.
As shown in the figure, a protrusion 14 provided on the entire upper side of the front fold portion of the upper gusset portion 6 is provided at the center of the upper side of the fold portion, as shown in the drawing, on both sides of the film, that is, the wall film 1.
And a top film opposed thereto are extended to provide a trapezoidal portion and a spout portion 10 protruding upward in a tapered shape on the trapezoidal portion. To the vicinity of the tip end of the spout portion 10 so that the edges on both sides are heat-sealed by the upper seal portions 11, 11 and the spout portion seal portion 19 in a shape in which the inner lines are connected by an inclined straight line, A perforated line 16 and a notch 17 at its end are provided near the tip of the spout 10, and the gusset 6 on the rear side of the upper gusset 6 is
A seal pattern in which the inside has an inverted V-shape with an obtuse angle, that is, the pattern of the upper gusset part back side seal part 13 is changed and heat-sealed. One film (for example,
Only the wall film 1 ') is extended to provide an extension portion 15 having the same shape as the lower trapezoidal portion of the protruding portion 14 provided on the upper side of the front fold portion. A hole 18 for a handle is provided, and the seal pattern of the lower gusset portion 7 is further formed by heat sealing with a ship bottom type seal pattern in which the inside is formed by a curved line, that is, the bottom seal portion 8,
Others are formed and configured in the same manner as the self-supporting bag 200 shown in FIG.

In the self-supporting bag 300 of this configuration, the filling of the contents is performed from the uppermost spout, so that the spout sealing section 19 is an unsealed opening before the filling of the contents. After the contents are filled, the contents are sealed by heat sealing. Also, since this part is provided on the trapezoidal part, the heat sealing of the spout part sealing part 19 can be easily separated from the back side fold-like part and easily heat-sealed.

By adopting such a configuration, the self-supporting bag 300 is heated by the seal pattern of the lower gusset portion 7, that is, the bottom seal portion 8 is formed by a ship bottom type seal pattern in which the inside is formed by a curved line. Since the bag is sealed, the shape of the bag body when the contents are filled, particularly the shape of the lower portion becomes an elliptic column shape, and the folded length of the upper film of the upper gusset portion 6 is smaller than that of the lower gusset portion 7. The folds formed on the front side of the upper gusset part 6 are formed smaller than the folded length of the bottom film, and the inner lines of the heat seal parts on both sides extend upward from the bases on both sides thereof to the upper part of the spout 10. It is heat-sealed in a shape that connects with an inclined straight line so as to taper toward the bottom, and the fold-shaped portion on the back side is heat-sealed with an inverted V-shaped seal pattern with an obtuse inside. When the filled content is transferred to another container, the film on both sides from the spout 10 to the base of the gusset 6 due to the internal pressure of the content flowing to the spout, The wall film 1 and the top film are spread forward and backward to form a funnel shape. At this time, the upper gusset part back side seal part 13 has an obtuse inverted V-shaped apex of the seal pattern and the opening of the spout part 10. The upper film bends in the shape of a ridgeline toward it, so the funnel shape becomes triangular pyramid and its shape retention is improved, and the outward bending of the funnel shape is also prevented, and the contents are stable and smooth to the end. Can be transferred. In addition, the overall shape of the self-supporting bag 300 also has a smart appearance similar to a container such as a bottle because the upper portion is tapered. Except for the above-described changes, the configuration is the same as that of the self-supporting bag 200 shown in FIG.

FIG. 7 is a front view showing the structure of a fourth embodiment of the self-supporting bag according to the present invention. FIG. 8 is a diagram showing the self-standing bag shown in FIG. It is a schematic side view which shows the shape at the time of it. The self-supporting bag 400 shown in FIGS.
Is the configuration of the self-supporting bag 200 shown in FIG.
A projecting portion 1 including a spout portion 10 provided by extending a film on both sides on the upper side of the front fold portion of the upper gusset portion 6.
It is configured by changing only the shape of No. 4 as follows, and shows a different example of the method of forming the spout.

That is, the projecting portion 1 provided by extending the film on both sides is provided on the upper side of the front fold portion of the upper gusset portion 6.
4 is provided with a two-stage trapezoid, which is initially the same width as the upper side of the pleat, then narrowed in the center, and is further protruded therefrom with a narrower width. Outlet 10
In addition to providing the heat seal portions on both side edges of the front fold portion, the inner line is formed by an inclined straight line from the base portion of the fold portion to the upper trapezoid portion. At the upper spout 10 therefrom, the seal pattern is changed to a parallel seal pattern and heat sealing is performed. Further, only one film (for example, a wall film) is placed on the upper side of the back side of the fold-shaped portion, Projection 1 provided on the folds
4 Extend to the same shape up to the height of the lower trapezoid, and extend 1
5 and the extension 15 is provided with a hole 18 for the handle of the bag. Also in this case, the filling of the contents is
As in the case of the self-supporting bag 300 shown in FIG. 5, since the operation is performed from the uppermost spout, the upper seal portion 12 of the protruding portion should be an unsealed opening before the filling of the contents, and should be heated after the filling of the contents. It is to be sealed and sealed.

By adopting such a configuration, the self-supporting bag 400 is different from the self-supporting bag 200 shown in FIG. 3 in that the protruding portion provided on the upper side of the front fold portion of the upper gusset 6 is provided. The part 14 is formed in a tapered shape as a whole up to the uppermost spout part 10, and the main body part of the bag 400 after filling the contents spreads in a hexagonal column shape, so that it can be further formed into a shape-retaining container such as a bottle. It has a similar smart appearance. And
When transferring the filled contents to another container, the front folds form a funnel shape from the base to the spout, and insert a finger into the hole 18 for the handle to insert the upper part of the bag. By tilting the bag with the spout 10 toward the mouth of the container while holding, the upper gusset part back side seal part 1
Since two ridge-like bent portions are formed from the corners on both sides of the inverted ship bottom-shaped seal pattern toward the opening of the spout, the funnel shape becomes a pyramid shape, and the shape including the opening is formed. The contents can be easily transferred in a stable state to the end without good shape retention and without the funnel shape being bent outward. Except for the above changes, the configuration is the same as that of the self-supporting bag 200 shown in FIG.

FIG. 9 is a front view showing the structure of a fifth embodiment of the self-supporting bag according to the present invention. FIG. 10 is a diagram showing the self-standing bag shown in FIG. It is a schematic side view which shows the shape at the time of it. The self-supporting bag 5 shown in FIGS.
In the configuration of the self-supporting bag 200 shown in FIG. 3, the seal pattern of the bottom seal portion 8 for heat-sealing the gusset portion 7 at the bottom of the bag has a shape in which the inside has a curved linear shape and the center portion is depressed. The shape of the protrusion 14 including the spout 10 formed by extending the film on both sides is entirely changed over the entire upper side of the gusset part 6 on the front side of the upper gusset part 6. The width of the pleated portion is gradually narrowed from both sides of the upper side toward the upper direction, and the spout portion 10 is changed to a shape in which the spout portion 10 is formed near the upper end edge and both sides are parallel to each other. The edges on both sides of the ridge are heat-sealed so that the inner line is connected by an inclined straight line from the base of the fold to the vicinity of the upper edge of the spout 10. At the top of the fold on the back side of part 6, One film (e.g., a wall film 1 ') the shape of the extension portion 15 provided to extend only,
On both sides, the width is gradually reduced toward the upper side in the same shape as the protruding portion 14 of the front pleat, and the height is lower than that of the protruding portion 14. 18
Is provided. Also in this case, the contents are filled in the self-supporting bags 300 and 400 shown in FIGS.
In the same manner as described above, since the operation is performed from the uppermost spout, the projecting portion upper seal portion 12 is an unsealed opening before filling the contents, and is heat-sealed after filling the contents to seal.

By adopting such a configuration, the self-supporting bag 500 is different from the self-supporting bag 200 shown in FIG. In addition to the elliptical column shape, the protrusion 14 or the extension 15 provided on the upper side of the fold portion in front of and behind the upper gusset portion 6 has a shape in which the width gradually decreases toward the upper direction. For example, like the self-supporting bag 400 shown in FIG. 7, since the shape is such that there is no step outside the protrusion 14 and the shape is smoothly tapered, the shape is smarter like a shape-retaining container such as a bottle. Appearance. When transferring the filled contents to another container, the upper gusset portion 6 and the protruding portion 14 extending from the front fold portion are provided.
7 except for the outer shape of the protruding portion 14 and the extension portion 15 such as the seal pattern around the outer peripheral portion and the seal pattern of the upper gusset portion rear side seal portion 13.
Is substantially the same as the upper part, so that the funnel shape formed from the base part of the front pleat part to the spout part is formed from the corners on both sides of the inverted ship bottom type seal pattern of the upper gusset part rear side seal part 13. Two ridge-shaped bent portions are formed toward the opening of the spout, and the funnel shape becomes a pyramid shape, so that the shape of the spout portion including the opening is good, and the funnel shape is The contents can be easily transferred to a stable state without being bent outward. Except for the above-mentioned changes, the configuration is the same as that of the self-supporting bag 200 shown in FIG.

FIG. 11 is a front view showing the structure of a sixth embodiment of the self-supporting bag according to the present invention. FIG. 12 is a diagram showing the self-standing bag shown in FIG. It is a schematic side view which shows the shape at the time of it. The self-supporting bag 600 shown in FIGS. 11 and 12 is different from the self-supporting bag 500 shown in FIG. 9 in that the folded length of the upper surface film of the upper gusset portion 6 is smaller than that of the lower film of the lower gusset portion 7. In order to further facilitate the filling of the contents, the width of the projecting portion upper seal portion 12 is increased, and the width of the spout portion 10 is set to be smaller than the folded length of the spout.
The configuration of the projecting portion 14 is modified as follows so that the self-standing bag 500 shown in FIG.

That is, the projecting portion 14 is connected to the upper gusset portion 6.
The upper part of the front fold is changed to a shape with a trapezoid with the same width as the fold and the film on both sides extended and a protruding part with a slightly narrower shape in the center at the top. At the same time, the seal pattern of the protrusion upper seal portion 12 for heat-sealing the upper edge portion of the protrusion portion 14 is changed to a seal pattern having a concave portion at the inner central portion, and the spout portion 10 is opened. A cut line 16 is provided so as to cross the recessed portion of the projecting portion upper seal portion 12 and notches 17 are provided at both ends thereof.
The inner edges of both sides of the protrusion 14 are connected by an inclined straight line from the base of the front pleat to the upper part of the substantially trapezoid, and are substantially parallel from there to the upper end of the protrusion 14. The upper gusset portion 6 has only one film (for example, the wall film 1 ') extended on the upper side of the fold portion on the back side of the gusset portion 6 to form a front fold portion. An extension 15 having the same shape as the trapezoidal portion of the projecting portion is provided, and the extension 15 is provided with a hole 18 for a bag handle.

By adopting such a configuration, the self-contained bag 600 can be more easily filled with contents as compared with the self-contained bag 500 shown in FIG. Since the spread of the upper gusset portion 6 in the front-rear direction is narrower than the spread of the lower gusset portion 7 as a whole, the sense of stability is further increased, and the self-standing stability is improved. Also, when transferring the filled contents to another container, the width of the opening of the spout 10 can be adjusted appropriately, and the gusset 6 at the upper part and the pleated part at the front side are extended. The funnel shape formed on the protruding portion 14 has good shape retention, and furthermore, the outward bending of the funnel shape is more reliably prevented.
The contents can be transferred smoothly and easily to the end in a stable state.

[0064]

As described above in detail, according to the present invention, there is provided a laminated film bag for hermetically packaging a fluid content such as a liquid material, which is excellent in preservability of the content and lightweight. It is not bulky and easy to dispose after use, and even when the bag has self-sustainability and a large content, it is easy to carry and handle when transferring contents to another container. At the same time, the opening of the spout and the shape retention are also good, and the appearance is smart, similar to a shape-retaining container such as a bottle, and the body of the bag after the contents are filled may have wrinkles. In addition, the present invention has an effect of being able to provide a self-supporting bag with excellent form stability, excellent suitability for use, and excellent appearance such as a display effect at a store with good productivity.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration of a first embodiment of a self-supporting bag of the present invention.

FIG. 2 is a schematic side view showing a shape when the self-supporting bag shown in FIG. 1 is filled with contents and the bag is inflated.

FIG. 3 is a front view showing the configuration of a second embodiment of the self-supporting bag of the present invention.

FIG. 4 is a schematic side view showing a shape when the self-supporting bag shown in FIG. 3 is filled with contents and the bag is inflated.

FIG. 5 is a front view showing the configuration of a third embodiment of the self-supporting bag of the present invention.

FIG. 6 is a schematic side view showing a shape when the self-supporting bag shown in FIG. 5 is filled with contents and the bag is inflated.

FIG. 7 is a front view showing the configuration of a fourth embodiment of the self-supporting bag of the present invention.

8 is a schematic side view showing a shape when the self-supporting bag shown in FIG. 7 is filled with contents and the bag is inflated.

FIG. 9 is a front view showing the configuration of a fifth embodiment of the self-supporting bag of the present invention.

FIG. 10 is a schematic side view showing a shape when the self-supporting bag shown in FIG. 9 is filled with contents and the bag is inflated.

FIG. 11 is a front view showing the configuration of a sixth embodiment of the self-supporting bag of the present invention.

FIG. 12: Filling the contents into the self-supporting bag shown in FIG. 11,
It is a schematic side view which shows the shape when a bag is inflated.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1, 1 'Wall film 2 Top film folded part 3 Bottom film folded part 4 Top film cutout part 5 Bottom film cutout part 6, 7 Gusset part 8 Bottom seal part 9 Side seal part 10 Outlet part 11 Upper part seal Part 12 Projection part upper seal part 13 Upper gusset part back side seal part 14 Projection part 15 Extension part 16 Cutout line 17 Notch 18 Handle hole 19 Spout part seal part 100, 200, 300, 400, 500, 600 Independence bag

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Koji Otsuka 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai-Nippon Printing Co., Ltd. (72) Nana Sugimoto 1-1-1, Ichigaga-cho, Shinjuku-ku, Tokyo No. 1 Inside Dai Nippon Printing Co., Ltd. (72) Inventor Kenichi Masuda 1-1-1, Ichigaya Kagamachi, Shinjuku-ku, Tokyo Inside (72) Inventor Takao Okada Takaichi Okada, Ichigaya Kachiichi, Shinjuku-ku, Tokyo Chome 1-1 Dai Nippon Printing Co., Ltd. F term (reference) 3E064 AB14 BA21 GA01 HJ01 HM01 HN05 HP01 HP02

Claims (5)

[Claims] 1. A gusset part formed by folding and inserting a top film or a bottom film inward between a top and a bottom of a wall film having two front and rear sides, respectively, and joining them by heat sealing. Formed in the form having
In a bag in which a body portion is formed by heat-sealing both side edges of a front and rear wall film with a side seal portion, a lower gusset portion is heat-sealed with a seal pattern having a shape imparting self-supporting property. In the upper and lower gussets of the front and rear folds, the upper side of one of the gussets is provided with a protrusion extending from the film on both sides of the gusset, that is, the wall film and the upper surface film opposed thereto. A spout having a narrow width is provided on the protruding portion, and the upper side of the other fold portion has films on both sides thereof, that is, one of a wall film and a top film opposed thereto. A self-supporting bag, characterized in that an extension is provided by extending only the extension, and a hole for a handle or hanging is provided in the extension. 2. A seal pattern in which the lower gusset part is provided with a self-sufficiency is a bottom-shaped seal pattern in which the inside is lower at the center and higher toward both ends. Item 2. The self-supporting bag according to Item 1. 3. The spout portion is provided on the upper side of one of the gusset portions of the upper gusset portion in such a manner that the films on both sides are extended and tapered toward the upper direction. The self-supporting bag according to claim 1 or 2, wherein both side edges are heat-sealed in a shape in which an inner line is connected by an inclined straight line from a base of the fold to an upper portion of the spout. . In the upper and lower gusset portions of the bag, the folded length of the top film inserted into the upper gusset portion is the same as the folded length of the bottom film inserted into the lower gusset portion, or The self-supporting bag according to any one of claims 1 to 3, wherein the self-standing bag is formed to be smaller than the folded length of the bottom film. 5. The self-supporting bag according to claim 1, wherein an opening means is provided at the spout.