JP2002019791A - 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 is formed of a laminate film in a shape having upper and lower gussets 6 and 7 with both sides sealed by side sealing parts 9 and 9, a projecting part 14 is provided on an upper side of one (forward) pleat-like part of the upper gusset 6 by extending films on both sides, and a narrow spout 10 is provided on the projecting part. The other pleat-like part is heat-sealed by a back side seal part 13 of the upper gusset of a shape with the inner side being recessed toward a center part from both sides, an extension seal part 15 having a cutting line 18 in the transverse direction for forming a handle part of the bag is extended to the upper side, and the lower gusset 7 is heat-sealed by a boat-bottom shaped bottom seal part 8.

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.
It has a cylindrical shape similar to a vertically long three-dimensional container and at the same time has self-supporting, equipped with a narrow width spout and bag handle at the top,
The present invention relates to a self-supporting bag which is excellent in form stability after filling contents 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,
Since the contents can be packed compactly without being light and bulky, resources can be saved and distribution costs can be reduced.Furthermore, disposal after use is easy. The one in which the spout made of a plastic molded body is attached to the upper part is easy to handle, and has excellent performance as well as performance.

[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 protrusion is provided by extending the upper film, a spout having a narrow width is provided in the protrusion, and an upper edge of the fold is provided on the upper side of the other fold. Heat sea An extension seal portion is provided by extending the portion, and the extension seal portion is provided with a horizontal score line for forming a handle portion of the bag, and at least the extension seal portion above the score line is provided with the same. The self-supporting bag is characterized by being joined by heat sealing to the folds on the side where the protruding portion is provided at the upper film cutout portions provided on the left and right side edges.

[0008] A horizontal cut line for forming the handle portion of the bag is used for inserting a finger and making the bag easy to hold when carrying the bag or transferring the contents to another container. What is necessary is just to form in the lateral direction as a whole, and the shape of the detail can be formed arbitrarily. For example, in addition to a horizontal straight line, a score line having a slight break or bend such as a large arc shape may be used, or a score line having both ends rounded may be used. However, in view of productivity, a score line that cuts the extension seal portion linearly in the lateral direction is preferable.

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 is provided, and on the upper side of the other fold, an extended seal is provided by extending the heat seal at the upper edge, and a transverse score line is formed on the extended seal. A handle portion is provided.

Therefore, the gusset portion of the upper gusset portion on the side where the extension seal portion is provided is heat-sealed with a sufficient area below the lateral cut line, so that the rigidity of this portion is reduced. In the case of a normal standing pouch-type bag that has been raised, the wrinkles that have been generated inward from the side seals on both sides are eliminated from the middle part of the trunk toward the top, and the appearance and form of the bag Stability is improved. In addition, the bag has a cylindrical main body and an outer shape that is smart similar to a shape-retaining container such as a bottle, and has an excellent display effect at stores.

When the contents are transferred to another container, the narrow width spout is opened, and the opening is inclined toward the opening of the container so that the contents are directed toward the opening. The film on both sides of the upper gusset portion including the spouting portion spreads outward due to the internal pressure, and the funnel shape of the wall film and the upper surface film is formed in this portion with good shape retention, so that the contents are poured. The flow to the outlet is performed smoothly, and the contents can be safely and easily transferred to the end. At this time, the extension seal portion is provided on the upper side of the gusset portion of the upper portion of the bag where the spout portion is not provided, and the extension seal portion is provided with a handle by the lateral score line. Since the portion is formed, fingers can be inserted into the cut line to hold the upper portion of the bag and support the lower portion from below. Therefore, both the upper part and the lower part of the bag can be easily held, and even if the bag has a large capacity, it is easy to hold, and the contents can be safely and easily transferred. Further, the handle portion of the bag can be used when 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 step or bend in the middle, and has a more regular conical or pyramidal shape, so that the shape retention is improved, and the flow of the contents to the spout portion is improved. 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, 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 gussets on the front and rear sides of the upper gusset, the upper side of one of the gussets is provided with films on both sides, that is, a wall film and an upper surface opposed thereto. A protrusion is provided by extending the film, and a spout having a narrow width is provided at the protrusion. 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. It is preferable that the length is formed smaller than the length to suppress the outward bending of the funnel-shaped portion.

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. And, when the folded length of the top film of the upper gusset part is formed smaller than the folded length of the bottom film of the lower gusset part, the self-supporting bag filled with the contents is moved forward and backward in the upper part of the bag. As a whole, the spread of the bag becomes smaller than that of the lower part, the self-sustainability of the bag and the sense of stability are increased, and the bend of the spout portion to the outside of the funnel shape is prevented, so that the effect of the funnel shape 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 folded length of the top film is reduced to the maximum, the folded portion of the upper gusset will be folded while leaving the heat-seal portion at the upper edge of the fold portion on which the protrusion is not provided. Even in this case, the spread of the upper part of the bag in the front-rear direction only depends 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, the funnel is formed. There is no tendency to bend to the outside of the shape, and the stability of the funnel shape when pouring out the contents is improved, and at the same time, the film of the upper gusset part overlaps and the rigidity improvement effect due to its heat sealing part Is obtained, so that the wrinkles generated from the side of the body of the bag toward the inside can be prevented, and the form stability of the bag 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 heat sealing device or a trimming device, such as a projecting portion, a spout portion, or an extended seal portion, which is extended to a front and rear gusset portion of the upper gusset portion, and an extension seal portion. Bags can be easily manufactured by appropriately adding a processing device for a horizontal score line, that is, a slitting device or a punching device.

The gussets on the upper side of the bag have gussets on both sides, on one side of which a protruding part and a spout are provided, and on the other side, an extension seal is provided. In the heat-sealing of the folds, it is necessary to heat-seal with a different seal pattern. For this reason, it is necessary to heat seal the front and rear pleats separately, but by dividing into a plurality of sections and heat sealing, it is possible to make a bag without any problem.

[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.
The upper and lower parts of the main body are folded back inward between the upper and lower parts of the front and rear wall films 1, 1 ', respectively. Insert up to the folded part 2,
In the case of a bottom film, it is formed into a shape having gusset portions 6 and 7 by a method of inserting up to the bottom film folded portion 3 and heat-sealing each with a predetermined seal pattern, and the body portion of the wall film 1, 1 '. Both side edges are heat-sealed with side seal portions 9, 9. In this case, the vertical length of the upper gusset portion 6, that is, the folded length of the top film, is formed to be the same as the vertical length of the lower gusset portion 7, that is, the folded length of the bottom film. Have been.

The lower gusset portion 7 is heat-sealed with a ship bottom-shaped seal pattern in which the inner side is formed by a curved line, that is, the bottom seal portion 8, but the both side edges of the bottom film to be inserted. In the vicinity of the lower end, bottom film cutouts 5 and 5 are provided. At this portion, the inner surfaces of the wall films 1 and 1 'on both sides are thermally bonded to each other, and the self-sustainability of the bag 100 is improved.

One of the front and rear gussets of the upper gusset 6 (front side in FIG. 1) has a film on both sides, that is, the wall film 1 and the entire upper side. A protruding portion 14 is provided by extending the opposing upper surface film, and both side edges of the front fold portion including the protruding portion 14 are formed by extending the side seal portions 9 and 9 as they are. That is, the upper sealing portion 1
At the corner of one of the upper portions (left side in FIG. 1) of the protrusion 14, a cut line 16 for forming the spout 10 and notches 17, 17 at both ends thereof are provided. The gusset part 6 on the other side (the back side in FIG. 1) of the upper gusset part 6 is provided with
The inner side is recessed in a straight line inclined from both sides toward the center, and is formed in an inverted ship bottom-shaped seal pattern that is horizontal at the center. On the upper side, the lower heat seal portion is extended upward as it is, and the extension seal portion 15 is formed by heat sealing the wall film 1 'and the upper surface film.
The extension seal portion 15 is further provided with a transverse score line 1 for forming a bag handle portion 20 (see FIG. 2).
8 are provided.

When the extension seal portion 15 is extended, the extension seal portion 15 is provided with a transverse score line 18 over the entire width thereof, so that at least the extension seal portion above the score line 18 is provided. The edges on both sides need to be joined to the folds on the side where the protrusions 14 are provided. For this reason,
At both side edges of the upper film folded back into the upper part of the bag, upper film cutouts 4 and 4 are provided below the score line 18, and the upper film notch is also provided above the score line 18. 4 'and 4' are provided so as to be thermally bonded to the folds on the side where the protrusions 14 are provided.
In this case, the notches 4, 4 and the notches 4 ',
In the case where the width of the upper seal portions 11, 11 of the pleated portion on the side where the protruding portion 14 is provided is not sufficient around the 4 ′, it is not shown in the drawing. The seal width of 11, 11 can be increased. This is the same for the self-supporting bag 200 shown in FIGS. Further, the upper film cutouts 4 and 4 below the score line 18 are preferably provided for stabilizing the shape of the bag, but may be omitted. This is the same for the self-supporting bags 200, 300, 400, 500, and 600 shown in FIGS. 3, 5, 7, 9, and 11 below.

The protruding portion upper sealing portion 12 at the upper edge of the protruding portion 14 is used to heat-tightly seal after filling the contents in order to use this portion as a filling port for contents. . This point is shown in FIGS. 3, 7, 9, and 11.
The same applies to the self-supporting bags 200, 400, 500, and 600 shown in FIG. However, the same applies to the self-supporting bag 300 shown in FIG. 5, but the shape of the heat seal portion at the upper edge is changed to the spout portion seal portion 19 with the shape change of the upper portion of the protrusion 14. Therefore, this portion is used as a filling port for the content, and the spout outlet portion sealing portion 19 is heat-sealed and sealed after the content is filled.

Also, a spout 10 for pouring out the contents.
In this case, a cut line 16 and notches 17 at both ends are provided at the upper corner portion of the protruding portion 14 in this case, but the cut line 16 is further cut along the cut line 16 by laser light irradiation or the like. Additional lines can be provided. The position of the spout 10 is not limited to the upper corner but may be provided at the center. In this case, for example, the seal pattern of the protrusion upper seal portion 12 is changed to a shape having a recess at the inner central portion, and the cutout line 16 is crossed from the upper side of the protrusion 14 across the recess. It may be provided. 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, the shape of the container to be transferred, particularly the size of the mouth, and the like.

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 the contents, and has a disposal treatment after use. Easy. Then, the self-supporting bag 100 filled with the contents is placed on the upper side of the gusset part of the upper gusset part 6 where the spout part 10 is not extended, and the lower heat seal part, that is, the upper part The gusset part back side seal part 13 is extended in the upper direction to provide an extension seal part 15, and the extension seal part 15 is provided with a horizontal score line 18 for forming a bag handle part 20, Also,
Since the lower gusset part 7 is heat-sealed by the bottom seal part 8 of a ship bottom shape formed by a curved line on the inside, the lower cross section has an elliptical shape, and a ring-shaped leg part is provided on the outer periphery of the bottom part. Is formed, so that the self-sustainability is excellent and the handle portion 20 facilitates carrying and other handling of the bag.

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. In the upper gusset portion 6, the back side folds are heat-sealed with the upper gusset back side seal portion 13 of the inverted ship bottom seal pattern, and the front and rear folds are formed on the left and right sides. Thermal bonding at the upper film cutouts 4, 4 provided near the upper end further enhances the reinforcing effect of the upper part of the bag, and in the case of a self-supporting bag having a normal shape, the middle of the body of the bag. The generation of wrinkles, which has occurred on both sides of the position slightly upward from the portion, is also eliminated, and the shape stability of the bag 100 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 if the capacity of the self-supporting bag 100 is large,
A transverse score line 18 provided in the extension seal portion 15
The finger can be inserted into the bag and held, and the lower part of the bag can be poured out by supporting it from below, so that the pouring operation is easy and the bag can be safely transferred.

FIG. 3 is a front view showing the structure of a second embodiment of the self-supporting bag of the present invention, and 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 nearly symmetrical vertically and the inverted bottom shape in which the top and bottom are inverted. Heat sealed with the (upper) seal pattern, so when the bag is filled with contents,
In this case, the shape becomes close to a hexagonal prism, 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 configuration 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 drawing, as shown in the drawing, a protrusion 14 provided by extending the film on both sides over the entire upper side of the front fold portion of the upper gusset portion 6 is initially the same width as the upper side of the fold portion, and then the center thereof. A two-stage trapezoidal portion having a reduced width, and a spout portion 10 protruding upwardly in a tapered shape. From the base to the vicinity of the tip end of the spouting portion 10, the edges on both sides are heat-sealed by the upper sealing portions 11, 11 and the spouting portion sealing portion 19 so that the inner lines thereof are connected by an inclined straight line. In the vicinity of the tip of the spout 10, a cutout line 16 and notches 17, 1
The gusset portion 7 on the rear side of the upper gusset portion 6 is changed to a seal pattern in which the inside has an inverted V-shape with an obtuse angle, that is, the pattern of the upper gusset portion rear side seal portion 13 and heat sealing is performed. At the same time, a lower heat seal portion, that is, an upper gusset portion rear-side seal portion 13 is provided on the upper side of the fold portion at the same width, and a lower portion of the lower portion of the protrusion 14 provided on the front fold portion. Extending to the height of the trapezoidal portion, an extension seal portion 15 is provided, and the extension seal portion 15 is provided with a horizontal score line 18 for forming a bag handle portion 20 (see FIG. 6). The seal pattern of the lower gusset part 7 is 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 part 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 having this configuration, the filling of the contents is performed from the topmost spout, so that the spout seal 19 is not filled before the contents are filled as described above. It is an opening of the seal, and is heat-sealed after filling of the contents and sealed. Also, at the time of heat sealing of the spout outlet seal portion 19, since this portion is provided on the pedestal portion, it is easy to separate from the fold portion on the back side, and heat sealing can be easily performed.

By adopting such a configuration, the self-supporting bag 300 has a seal pattern of the lower gusset portion 7, that is, the bottom seal portion 8 is heat-sealed 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 change, the self-supporting bag 200 shown in FIG.
Since the configuration is similar to that of the self-standing bag 200, the same operation and effect as those of the self-supporting bag 200 can be obtained.

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 the same as the trapezoidal portion of the protruding portion 14 of the self-supporting bag 300 shown in FIG. A step-shaped trapezoidal portion, and a spout portion 10 further provided on the both sides thereof so as to be parallel and protruding to a narrow width, are provided in a changed shape, and both side edges of the front pleat-shaped portion are provided. From the base of the folds to the upper trapezoid, the inner line is formed as an inclined straight line, and the heat is discharged by changing the seal pattern to be parallel to the spout 10 above. On the upper side of the back side fold, a lower upper gusset part back side seal part 13 having the same width and a height lower than that of the protrusion 14 provided on the front side fold is formed. Extending to the same height as the trapezoidal portion, an extension seal portion 15 is provided. Of the handle portion 20 is constructed by providing the transverse score line 18 to form a (see FIG. 8). Also in this case, since the filling of the contents is performed from the top spout 10, the upper seal portion 12 of the projecting portion is an unsealed opening before the filling of the contents, and is heat-sealed after the filling of the contents. It is to be 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 portion 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 pleats form a funnel shape from the base to the spout, and insert a finger into the horizontal score line 18 to insert the upper part of the bag. By tilting the bag with the spout 10 facing the mouth of the container while holding the opening, the opening of the spout from the corners on both sides of the inverted bottom seal pattern of the upper gusset back seal 13 Since the two ridge-shaped bent portions are formed in a funnel shape toward, the funnel shape becomes a pyramid shape,
The shape retention property including the opening is good, and the funnel shape does not bend outward, so that the contents can be easily transferred in a stable state until the end. 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 of the present invention, and 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 lower portion of the bag has a shape in which the inside has a curved line shape and the center portion is recessed. The shape of the projection 14 including the spout 10 formed by extending the film on both sides is firstly changed over the entire upper side of the fold portion on the front side of the upper gusset portion 6 while changing the seal pattern to a ship bottom type seal pattern. Is the upper gusset 6
A trapezoidal part is formed by extending upward with the same width as that of the upper part, and the width gradually narrows from both sides toward the upper part with a slightly narrower width at the center of the upper side, and both sides are parallel near the upper edge Is changed to a shape in which the spout portion 10 is formed, and both edges of the front pleat portion are moved from the base of the pleat portion to the upper end of the spout portion 10. The upper gusset portion 6 is heat-sealed to the vicinity of the edge by an upper seal portion 11 having a shape connected by an inclined straight line. The extension seal portion 15 is provided by extending the portion 13 so as to have the same width and the same height as the trapezoid portion below the protrusion portion 14 of the front fold portion. A transverse score line 18 is provided for forming a bag handle 20 (see FIG. 10). Are those that you configured. In this case as well, the filling of the contents is performed from the spout 10 at the top of the bag. Therefore, the upper seal portion 12 of the protruding portion is an unsealed opening before filling the contents, and is heated after filling the contents. It is to be sealed and sealed.

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 upper part of the protruding portion 14 extending to the upper side of the fold portion on the front side of the upper gusset portion 6 has such a shape that the width gradually decreases from both sides toward the upper direction. Therefore, it has a smart appearance similar to a shape-retaining container such as a single-layer bottle. Then, when transferring the filled contents to another container, the heat seal portions on both sides of the front pleats including the protrusions 14 of the upper gusset 6, that is, the upper seals 11, 11 Inner line, and
The configuration is the same as that of the upper part of the self-supporting bag 400 shown in FIG. 7 except for the outer shape of the protrusion 14 such as the seal pattern of the upper gusset part back side seal part 13. The funnel shape formed over the outlet portion has two ridge-like bent portions from the corners on both sides of the inverted ship bottom-shaped seal pattern of the upper gusset portion rear side seal portion 13 toward the opening of the spout portion 10. Is formed, and the funnel shape becomes pyramid-shaped, so that the shape of the spout portion including the opening is good, and the funnel shape does not bend outward, and the contents are easily maintained in a stable state until the end. Can be transferred. Except for the above changes, the self-standing bag 200 has the same configuration as the self-standing bag 200 shown in FIG.
The same operation and effect as described above can be obtained.

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.
On the upper side of the front fold, a trapezoid is formed by extending the film on both sides with the same width as the fold, and a small protrusion is provided at the center of the base with a slightly reduced width. In addition to the change in shape, the seal pattern of the protrusion upper seal portion 12 for heat-sealing the upper edge of the protrusion portion 14 is changed to a seal pattern having a concave portion in the inner central portion. Cut line 16 for opening 10
Is provided so as to cross the recessed portion of the protruding portion upper seal portion 12, and notches 17 are provided at both ends thereof. The inner edges of the protruding portions 14 on both sides are connected by an inclined straight line from the base of the front fold portion to the upper portion of the substantially trapezoidal portion, and are inclined from there to the upper end of the protruding portion 14. Is heat-sealed with a seal pattern in which the upper gusset portion 6 has a lower side upper gusset portion rear side seal portion 13 of the same width and upper height on the upper side of the back side fold portion. Protrusions 14 of front pleats
Is extended so as to have substantially the same height as the lower trapezoidal portion, and an extended seal portion 15 is provided. A lateral cut for forming a bag handle portion 20 (see FIG. 12) on the extended seal portion 15 is provided. It is configured by providing a line of sight 18.

By adopting such a configuration, the self-contained bag 600 can be more easily filled with contents than the self-contained bag 500 shown in FIG. Since the spread of the upper gusset portion 6 in the front-rear direction is narrower as a whole than the spread of the lower gusset portion 7,
The sense of stability is further increased, and the independence stability is improved. And when transferring the filled contents to another container,
The width of the opening of the spout 10 can be appropriately adjusted by adjusting the width of the recess, and is formed on the upper gusset 6 and the projection 14 extending to the front pleat. The funnel shape has a good shape retention property, and the funnel shape is more reliably prevented from being bent outward, so that the contents can be smoothly and easily transferred to the end in a stable state.

[0065]

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 folding part 3 Bottom film folding part 4, 4' Top film notch part 5 Bottom film notch part 6, 7 Gusset part 8 Bottom seal part 9 Side seal part 10 Spout part 11 Upper seal part 12 Projection upper seal part 13 Upper gusset part rear seal part 14 Projection part 15 Extension seal part 16 Cutout line 17 Notch 18 Cut line 19 Spout port seal part 20 Handle part 100, 200, 300, 400, 500, 600 freestanding bags

 ──────────────────────────────────────────────────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) Inventor Nana Sugimoto 1-chome, Ichigaya-cho, Shinjuku-ku, Tokyo No. 1 Inside Dai Nippon Printing Co., Ltd. (72) Kenichi Masuda, Inventor 1-1, Ichigaya Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Takao Okada, Ichigaya Machiichi, Shinjuku-ku, Tokyo 1-chome No.1-1 Dai Nippon Printing Co., Ltd. F term (reference) 3E064 AB14 BA21 GA01 HJ04 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 protrusion, and an extension seal is provided on the upper side of the other fold to extend the heat seal at the upper edge of the fold. The extension seal portion is provided with a horizontal score line for forming a handle portion of the bag, and at least the extension seal portion above the score line is provided at both left and right end edges thereof. At the top film notch Self-supporting bag, characterized in that it is joined by the wrinkled portion of the side and the heat seal provided with the projecting portion. 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.