JP2005088926A - Bag with spout - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bag with a spout to seal and package liquid content in which the content can be easily dividedly used, or refilled in another container, no conventional rib for preventing pouch closing is required for the spout, the size and the cost of the spout can be reduced, spouting is not impaired by adhesion of bag laminate films to each other even in a final spouting stage, the liquid content can be smoothly spouted to a last, and the volume can be easily reduced in disposal. <P>SOLUTION: A laminate film is heat-sealed to form a bag, a spout 20 of a plastic molding is mounted on an upper portion of the bag, and a pattern-like swollen portion S to lead the content to the spout is provided on the laminate films 1 and 1' on front and rear wall surfaces of the bag from at least a fitting part of the spout 20 to the inside of the bag, thereby constituting a bag 100 with a spout. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bag with a spout. More specifically, the liquid contents are sealed and packaged, and when the contents are used, an arbitrary amount is poured into a small amount, or can be safely refilled into another container. In addition, the present invention relates to a bag with a spout that can be poured out smoothly without any hindrance to pouring due to the close contact between the bag films even in the latter half of the content pouring.

  Conventionally, as a bag with a spout used to seal and wrap liquid contents and pour any amount into a small amount when using the contents, or to refill and use other containers, for example, stack the bag body A bag with a spout formed of a film and having a spout with a cap formed of a plastic molded body attached to a part of the upper part or the like has been used.

  Such a bag with a spout can be freely designed according to the purpose of use, and the spout has a shape retaining property (hardness). The spout itself is not blocked by the spout, and can be easily resealed with a cap.Further, since the bag body after use is flatly folded, it is not bulky compared to bottles and is easy to dispose of. It has been used conveniently because it is.

  However, even with such a bag with a spout, the bag body is flexible because it is formed of a laminated film, and in the second half of the content pouring, the bag clogs up near the spout and the laminated films on both sides There was a problem that it was easy to adhere and the content was not poured out.

In order to solve such a problem, for example, as a pouch spout attached by thermal bonding between the films on both sides of the edge of the pouch storing the liquid, a cylindrical spout main body and its tip A lid that is screwed to the part side, and one or more flange parts are provided in the middle part of the spout body, and the bottom part thereof, that is, the base part of the spout body is inserted inside the pouch. A pouch spout provided with an adhesive base that is thermally bonded to each other, and further provided with a rib for preventing occlusion of a rod-shaped pouch having a cross-sectional shape extending in the pouch below the adhesive base. Has been developed and put into practical use (see, for example, Patent Documents 1 and 2).
Japanese Patent Laid-Open No. 10-120000 (pages 2 to 5, FIGS. 1 and 4) JP-A-2001-253448 (pages 2 to 5, FIG. 6, FIG. 7) By attaching the pouch spout as described above to the pouch, for example, when pouring the contents filled in the pouch, Even when the content of the pouch is low, that is, when the contents of the pouch are low, at least in the part where the rib for preventing the clogging of the pouch exists from the attachment part of the spout to the lower part of the pouch, Since adhesion between films is prevented and a liquid passage is formed by the ribs, the contents can be smoothly poured out.

  However, when such a spout is attached to the pouch, the above-mentioned rib for preventing clogging of the pouch can obtain the effect of smoothly discharging the contents, but on the other hand, the rib for preventing clogging is provided. When the shape of the outlet becomes large and the spout is made by injection molding of plastic, the amount of resin used is naturally increased and the cost is increased, which is disadvantageous in terms of economy, and it is bulky when discarded after use. There was also a problem against the volume reduction of waste.

  The present invention has been made in order to solve such problems, and the problem is that in the field of a bag with a spout for sealing and packaging liquid contents, an arbitrary amount is used when the contents are used. It is possible to pour into a small dispenser or refill it safely into another container, and it is not necessary to provide a rib for preventing clogging of the pouch like the conventional one at the spout, the shape can be reduced, and the cost can be reduced. Advantages can be obtained, yet the second half of the content extraction, that is, when the remaining amount of the content is reduced, the laminated film on both sides of the bag can be prevented from sticking to each other to prevent the injection from being inhibited, To provide a bag with a spout that can smoothly pour out contents to the end, and can contribute to volume reduction of waste even when the bag is discarded after use.

  The above problems can be solved by the following present invention.

  That is, the invention described in claim 1 is a laminated film bag for hermetically wrapping liquid contents, and a spout formed by a plastic molded body is attached to the upper portion of the bag, and the laminated film of the bag is attached to the bag. The pouch has a pour-out bag characterized in that a pattern-like bulge is provided at least from the spout attachment portion toward the inside of the bag to guide the contents to the pour port.

  The invention described in claim 2 is a type in which the spout is opened and closed by a screw cap, and the screw cap is mounted on the outer periphery on the front end side around the cylindrical tube portion. The thread portion is provided, and at least one flange portion is provided at the intermediate portion, and the base portion is provided with an adhesive base portion having a cross-sectional shape having a larger width than the diameter of the cylindrical portion. The bag with a spout according to claim 1, wherein the bag is formed and attached to the bag by thermal bonding between the adhesive base and the inner surface of the bag.

  In the invention described in claim 3, the pattern-like bulge portion is provided in a continuous shape by forming a liquid passage from the attachment portion of the spout to the central lower portion and / or the peripheral portion of the bag. It consists of a bag with a spout according to claim 1 or 2.

  The invention described in claim 4 is the bag with a spout according to any one of claims 1 to 3, wherein the bag is a standing pouch type bag or a gusset pouch type bag.

  According to the invention described in claim 1, in the bag made of laminated film for sealing and packaging the liquid contents, the bag with the spout is attached to the top of the bag with the spout by the plastic molded body, Since the laminated film of the bag is provided with a pattern-shaped bulging portion for guiding the contents to the spout, at least from the attachment portion of the spout toward the inside of the bag, The main body is not bulky like an empty container such as a bottle, and can be efficiently stored and transported. Also regarding the spout, since the rib for preventing the closure of the pouch as in the prior art is not provided, the shape can be reduced and the cost can be reduced.

  When using the contents filled in the bag, use the spout attached to the top of the bag to pour out an arbitrary amount when needed, or refill it safely into another container. Can do.

  At this time, since the laminated film of the bag is provided with a pattern-shaped bulging portion for guiding the contents to the spout from at least the spout attachment portion toward the inside of the bag, the remaining amount of the contents Even when the amount is reduced, the laminated films on both sides of the bag are not in close contact with each other, and the dispensing of the contents is not hindered, and the contents can be smoothly poured out to the end.

  And since the bag with a spout after use at least the main body can be folded flat, it is not bulky and can also contribute to volume reduction of waste.

  According to the second aspect of the present invention, in the configuration of the bag with a spout according to the first aspect of the present invention, the spout is of a type that opens and closes with a screw cap, and is a cylindrical tube. A screw part for mounting a screw cap is provided on the outer periphery on the tip side with the part as the center, one or more flange parts are provided in the intermediate part, and the base part has a diameter larger than the diameter of the cylinder part. The cross section having a large width is formed in a shape provided with a hook-shaped adhesive base, and is configured to be attached to the bag by thermal bonding between the adhesive base and the inner surface of the bag. In addition to the effects of the invention, when the spout is thermally bonded to the bag, it can prevent the occurrence of seal failures such as missing seals, improving quality and stabilizing, and at the same time making the sealing work easier and producing. To improve Can.

  Further, even when the contents filled in the bag are poured out and used, the resealability of the spout is good and can be safely stored until the next use.

  For example, a refillable pouch is usually made in a single volume according to the capacity of the container to be refilled with contents, but it can also be made in a double volume by improving resealability. It is possible to reduce the packaging cost.

  According to the invention described in claim 3, in the configuration of the bag with spout of the invention described in claim 1 or 2, the pattern-like bulge portion is connected to the center lower part of the bag and / or from the attachment portion of the spout. Since the liquid passage is formed up to the peripheral part and provided in a continuous shape, in addition to the effects of the invention described in claim 1 or 2, when pouring the contents filled in the bag, Even when the remaining amount of contents is low, the contents can be guided to the spout more easily from the peripheral parts such as the bottom and sides of the bag, so that the pouring work becomes even easier. Goods can be used effectively without waste.

  According to the invention described in claim 4, in the configuration of the bag with spout of the invention described in any one of claims 1 to 3, the bag is configured as a standing pouch type or gusset pouch type bag. In addition to the function and effect of the invention according to any one of claims 1 to 3, in any type of bag, the bag filled with the contents greatly expands in the front and rear, and is almost flat on the bottom. Since the bottom surface is formed, it has excellent independence.

  Therefore, handling of the bag with a spout filled with the contents is facilitated, the appearance and the display effect are improved, and the bag can be packaged compactly for its capacity.

  In the present invention, the shape of the bag is not particularly limited. For example, in addition to a flat bag such as a three-side seal type, a four-side seal type, or a pillow type, a bag having a self-supporting type such as a standing pouch type or a gusset pouch type. Any of these can be used.

  こ れ ら Among these, standing pouch type or gusset pouch type bags can impart excellent self-supporting properties to the bag as described above, and can easily handle a bag with a spout filled with the contents. At the same time, the appearance and display effect are improved, and the packaging can be made compact, so that it can be used more suitably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of an example of a spout and a cap attached to a bag with a spout according to the present invention, where (A) is a front view of the spout, (B) is a bottom view of the spout, and (C). FIG. 3 is a front view of a cap.

  FIG. 2 is a front view showing the configuration of the first embodiment of the bag with spout of the present invention.

  FIG. 3: is a front view which shows the structure of the 2nd Example of the bag with a spout of this invention.

  In addition, (a), (b), (c), (d), and (e) in FIG. 4 are examples of the shape of the pattern-shaped bulge portion provided on the laminated film on the wall surface of the bag with a spout of the present invention. It is a front view of the principal part which shows. However, the present invention is not limited to these drawings.

  The spout 20 shown in (a) and (b) of FIG. 1 has an adhesive base 22 such as a bowl-shaped outer cross-section for heat-bonding and attaching to the bag at the lowermost part with the cylindrical part 21 as the center. 1 and a flange 23a, 23b serving as subs to be used for conveyance and the like are provided at an appropriate interval, and the uppermost part of FIG. The screw part 24 for screwing the cap 30 as shown in FIG.

  The adhesive base portion 22 is formed so that its upper and lower lines approach and match a smooth curved shape, such as a bowl shape instead of a circular shape, thereby facilitating thermal bonding with the bag. The occurrence of pinholes due to missing seals can be prevented.

  As for the cylindrical portion 21, the portion to which the uppermost cap 30 is screwed may be cylindrical, but the portion between the flanges 23 a, 23 b, and 23 below is rectangular in shape so that heat to the bag can be obtained. Positioning at the time of adhesion or the like can be facilitated.

  Such a spout 20 can be easily manufactured by plastic injection molding. And the attachment to a bag attaches the adhesion | attachment base 22 of the spout 20 to the inner surface of a bag, ie, the sealant layer of a laminated | multilayer film, from points, such as productivity, the reliability of adhesion, and safety.

  Accordingly, the material of the spout 20 is preferably a polyolefin resin such as polyethylene, polypropylene, or a copolymer thereof that can be thermally bonded to the sealant layer as a whole or at least the outer peripheral surface of the adhesive base 22.

  (C) in FIG. 1 is a front view showing a configuration of an example of a cap screwed into the spout 20 shown in (A) and (B) in FIG. 1, and the cap shown in (C) in FIG. 30 has a circular top plate 31 and a peripheral wall 32 that hangs continuously on the outer periphery thereof. A longitudinal groove 33 is provided on the outer peripheral surface of the peripheral wall 32 to prevent slipping. A screw groove (not shown) having a shape corresponding to the uppermost screw portion 24 of the spout 20 is provided on the surface, and a cap 30 is provided on the inner surface of the top plate 31, for example. A packing (not shown) that contacts the tip of the spout 20 and closes the opening in a liquid-tight manner when mounted on is installed.

  The cap 30 having such a configuration is a kind of screw cap and is very commonly used. Further, although not shown in the drawing, for example, under the peripheral wall 32 of the cap 30, A fixing ring is provided via a plurality of detachable connecting portions, and a locking portion for locking the fixing ring is also provided on the spout 20 side. When the cap is opened, the fixing ring cannot be reversely rotated and only the cap is connected. A pilfer proof function can also be added by rotating and disengaging due to breakage of the part.

  In addition, like the spout 20, such a cap 30 can also be easily manufactured by plastic injection molding.

  Next, FIG. 2, FIG. 3 is a front view which shows the structure of one Example of the bag with a spout of this invention, respectively.

  The bag with spout 100 shown in FIG. 2 is a bag made of a main body portion in a standing pouch form, and the bottom portion is placed between the lower portions of the laminated films 1 and 1 'on the front and rear wall surfaces in accordance with a conventional method. Formed in a form having a gusset part 4 formed by folding the film inward and inserting it to the bottom film folding part 2, in this case, a semicircular bottom film notch is formed in the vicinity of both lower ends of the bottom film folded inward. The parts 3 and 3 are provided, and the gusset part 4 is formed by heat-sealing with a bottom-shaped bottom seal part 5 in which the inner side is concave in a curved line shape from both sides to the central part. Moreover, the trunk | drum of the bag 100 is formed by heat-sealing the edge parts of the both sides of the laminated films 1 and 1 'on the front and rear wall surfaces with the side seal parts 6 and 6.

  A spout 20 having the configuration shown in FIGS. 1A and 1B is inserted in the central portion of the upper portion of the bag 100 between the adhesive films 22 between the front and rear laminated films 1 and 1 ′. The adhesive base seal portion 8 is attached by thermal bonding, and both sides thereof are heat sealed by the upper seal portions 7 and 7 and sealed.

  Note that a cap 30 having the configuration shown in FIG. 1C is attached to the screw portion 24 by screwing into the opening on the tip end side of the spout 20. However, when the bag is in a standing pouch type, such as the bag 100 with a spout, the cap 30 is usually used as a filling port for the contents, so that the cap 30 is connected to the spout 20 after filling the contents. It is attached.

  Further, the laminated film 1, 1 ′ on the front and rear wall surfaces is provided with the contents in the attachment portion of the spout 20, that is, in the region from the bottom of the adhesive base portion 22 of the spout 20 downward to the vicinity of the bottom of the bag. A vertical bar-shaped bulging portion S for guiding to the spout 20 is provided in advance by hot embossing or the like.

  In the present invention, the bulge portion S is preferably provided on the laminated film on both sides of the wall surface of the bag, but may be provided only on the laminated film on one side. When it is provided on the laminated film on both sides, it is usually provided in a pattern that overlaps symmetrically on both sides, but it can also be provided in a different pattern on both sides.

  Further, the width and height of the bulge portion S can be appropriately set according to the viscosity and fluidity of the contents to be filled, and are not particularly limited, but the width is preferably in the range of 3 to 15 mm. The height is preferably in the range of 1 to 5 mm.

  By adopting such a configuration, since the main body portion of the bag with spout 100 is formed of a standing pouch type bag made of a laminated film, the empty bag before and after use is not bulky and stored. And can be efficiently transported, and can be flattened when discarded after use, thereby contributing to volume reduction of waste.

  Further, the spout-equipped bag 100 filled with the liquid contents has a wide bottom and trunk parts and a leg portion formed by the bottom seal part 5 is formed on the outer periphery of the bottom part. It is easy to handle, has an excellent appearance, and can be packaged compactly for its capacity.

  And when using the filled content, since the said spout 20 and the cap 30 are attached to the upper part of the bag 100, when the cap 30 is removed, the spout 20 will open and the content will be removed. It can be dispensed in small quantities or all at once.

  Even when the contents are transferred to, for example, a bottle having a small diameter, the spout 20 is formed of a plastic molded body, so that it has shape retention (hardness) and closes in the middle. There is no such thing and it can be transferred easily and safely.

  Even when a part of the contents is used and the rest is stored, the cap 30 is a screw cap and is excellent in resealability, and the bag 100 is excellent in self-supporting property, so it should be stored safely until the next use. Can do.

  Further, when the contents are poured out, even when the remaining amount is reduced and the bag 100 is squeezed, the laminated films 1 and 1 ′ on both side walls face downward from the attachment portion of the spout 20, Since the vertical bulging portion S in the vertical direction is provided up to a position near the bottom of the bag, the laminated films 1 and 1 'on both sides are in close contact with each other, and the dispensing of the contents is not hindered. Since the bulging portion S forms a liquid passage, the contents are easily guided to the spout 20 and can be poured out smoothly to the end.

  The bag 200 with a spout shown in FIG. 3 has a main body portion made in a gusset pouch type, and such gusset pouch type bags have front and rear edge portions of the left and right gusset portions 4a and 4b. Is heat sealed with the side seal portions (6a, 6b), (6c, 6d), so that bags can be made in two ways.

  One method is a method of making a bag by forming both right and left gusset portions 4a and 4b by folding back on both sides using a wide one-piece roll-like laminated film as in a normal gusset pouch. One method is, for example, by using a four-piece roll laminate film of front and rear wall laminate films and left and right side laminate films, and between the left and right sides of the front and rear wall laminate films. The laminated film is inserted inward, and the left and right edge portions are heat-sealed with side seal portions (6a, 6b), (6c, 6d) to form the left and right gusset portions 4a, 4b to form a bag. Is the method.

  Hereinafter, the bag 200 with a spout will be described as a bag made by the former method for convenience.

  Using wide laminated film 1, the left and right sides are folded back so that the sealant layer is on the inside to form gusset portions 4 a, 4 b having fold-like folded portions 9 a, 9 b on the inside, and the folded sides The end portions of the laminated film 1 are overlapped on one side, and the edge portions of the four front and rear, right and left corners including the overlapped portion are heat sealed with side seal portions (6a, 6b), (6c, 6d). Thus, the main body portion of the cylindrical folded bag 200 is formed.

  In the figure, the laminated films on the front and rear wall surfaces are shown as laminated film 1 and laminated film 1 ', but in this case, they are the same laminated film.

  A spout 20 having the structure shown in FIGS. 1A and 1B is inserted in the central portion of the upper portion of the bag 200, and the adhesive base 22 is inserted between the front and rear laminated films 1 and 1 ′. The adhesive base seal portion 8 is attached by thermal bonding, and both sides thereof are heat sealed by the upper seal portions 7 and 7 and sealed.

  In addition, a cap 30 having the configuration shown in FIG. 1C is attached to the screw portion 24 by screwing into the opening on the distal end side of the spout 20. In this case, the bag 200 is a gusset pouch-type bag, and the filling of the contents can be performed from the unsealed bottom seal portion 5. Therefore, when the spout 20 is attached to the bag 200, the cap 30 is previously attached. The spout 20 can be attached by thermal bonding to the bag 200 in a state in which the spout 20 is screwed and attached to the screw portion 24 of the spout 20.

  Therefore, the bottom seal portion 5 is an unsealed opening before filling the contents, and is sealed by heat sealing after filling the contents from this portion.

  Also in this case, the laminated films 1 and 1 ′ on the front and rear wall surfaces are attached to the spout 20, that is, the adhesive base 22 of the spout 20, as in the bag 100 with spout shown in FIG. 2. A vertical bar-shaped bulging portion S for guiding the contents to the spout 20 is provided in advance in the region from the lower part of the bag to the vicinity of the bottom of the bag by hot embossing or the like.

  In the region of the upper seal portions 7 on the left and right sides of the bag 200 with spout, spot-like notches as shown by circular broken lines (not marked) at positions near the corners on the left and right sides. By providing the part only on the laminated film of the gusset part folded inward, the laminated films 1 and 1 'on the wall surfaces before and after this part are thermally bonded when the upper seal parts 7 and 7 are heat sealed. Therefore, it is possible to prevent the front and rear hook-like portions of the right and left gusset portions from opening in two, and the appearance can be improved.

  By adopting such a configuration, the spout-attached bag 200 is formed of a gusset pouch type bag made of a laminated film, so that the empty bag can be folded flat and is not bulky. It can be efficiently stored and transported, and can contribute to volume reduction of waste even when discarded after use.

  And the filling of the contents can be easily filled from the bottom opening (the part of the unsealed bottom seal part 5) which is greatly opened, and the gusset parts 4a, 4b on both sides are folded inward after filling, The bottom seal portion 5 can be sealed by heat sealing.

  The bag 200 with a spout filled with the contents has the gusset portions 4a, 4b on both sides of the trunk portion widened back and forth, and the edge portions at the four corners of the side portions are side seal portions 6a, 6b, 6c, 6d. Because it is heat-sealed, it has a reinforcing effect, the body is a solid square tube, and the bottom is also formed in a flat rectangular shape, improving self-sustainability and easy handling, and the body Has a square cylindrical shape and has a good appearance, and can be packaged compactly for its capacity.

  And when using the filled content, it showed to (b) and (b) of FIG. 1 like the bag 100 with the spout shown in the said FIG. 2 in the center part of the upper part of the bag 200. Since the spout 20 and the cap 30 shown in FIG. 1C are attached, by removing the cap 30, the spout 20 is opened, and the contents can be poured out in small quantities or all together. can do.

  Even when the contents are transferred to, for example, a bottle having a small diameter, the spout 20 has a shape retaining property (hardness), and does not clog in the middle of pouring, and easily It can be transferred safely.

  Even when a part of the contents is used and the rest is stored, the cap 30 is excellent in resealability with a screw cap, and the bag 200 is self-supporting, so it can be safely stored until the next use. be able to.

  Further, when the contents are poured out, even when the remaining amount is reduced and the bag 200 is squeezed, the laminated films 1 and 1 ′ on both wall surfaces face downward from the attachment portion of the spout 20, Since the vertical bulging portion S in the vertical direction is provided up to a position near the bottom of the bag, the laminated films 1 and 1 'on both sides are in close contact with each other, and the dispensing of the contents is not hindered. Since the bulging portion S forms a liquid passage, the contents are easily guided to the spout 20 and can be poured out smoothly to the end.

  In addition, in the bags 100 and 200 with the spout shown in FIG. 2 and FIG. 3, as the pattern-shaped bulge portion S provided on the laminated films 1 and 1 ′ on the wall surface of the bag, Specifically, a vertical bar-shaped bulge S provided in a region from the lower part of the adhesive base 22 of the spout 20 to the vicinity of the bottom of the bag is shown as an example, but the shape of the bulge S is This is an example of the simplest shape. In addition, as an example of a typical shape, a bulge portion S having a shape as shown in (a) to (e) of FIG. 4 can be provided.

  That is, (a), (b), (c), (d), and (e) in FIG. 4 are examples of the shape of the pattern-like bulge portion provided on the laminated film on the wall surface of the bag with a spout of the present invention. FIG. 5 is a front view of the main part, and in each case, the bulging portion S is connected to the spout attachment portion at the upper portion of the bag, specifically, the lower portion of the spout adhesive base 22 (including the spout base portion opening 25). Part) to the central lower part and / or the peripheral part of the bag, a liquid passage is formed and provided in a continuous shape.

  By providing the bulging portion S in such a shape, the remaining amount of the contents filled in the bag with the spout decreases, and even when the bag is squeezed, the laminated films on the wall surfaces on both sides of the bag adhere to each other. Therefore, since the bulging portion S forms a liquid passage, the contents can be easily guided to the spout and can be poured out without waste until the end. Is.

  In FIG. 4, an example using a standing pouch type bag is shown as the bag body, but the bag type is not particularly limited. As described above, the three-side seal type and the four-side seal type are used. The present invention can be similarly applied to bags of the gusset pouch type as well as bags of the pillow type. However, in the case of a bag having a back seal portion (center seal portion) at the center of the back of the bag, such as a normal pillow pouch or gusset pouch, the pattern and back of the bulge portion S including the attachment position of the spout are included. It is necessary to take measures such as moving the position of the back seal part to the side so that it does not overlap the seal part.

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

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

  Each of the base film layer, the intermediate layer, and the sealant layer may be formed as a single layer, or may be formed by laminating a plurality of layers.

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

  These may be used singly or may be used by combining a plurality.

  In the case where the intermediate layer is a gas barrier layer, the intermediate layer includes a film of saponified ethylene / vinyl acetate copolymer (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), aluminum foil, or , Biaxially stretched nylon film (ON film), biaxially stretched polyethylene terephthalate film (PET film), biaxially stretched polypropylene film (OPP film), etc. provided with vapor deposition layers such as silica, alumina, aluminum, and PVDC coating layers Can be used.

  Among these, since the film provided with the aluminum foil or the aluminum vapor deposition layer is opaque, it can also serve as a light shielding layer.

  Moreover, when making an intermediate | middle layer into a strength improvement layer, either of the said base film may be additionally laminated | stacked suitably, and a biaxial stretching high density polyethylene film etc. can also be laminated | stacked also as a moisture-proof layer.

  A known dry lamination method or extrusion lamination method (sandwich lamination method) can be used for laminating the base film layer and the intermediate layer.

  The innermost sealant layer includes low-density polyethylene (LDPE) and linear low-density polyethylene (L / LDPE), as well as ethylene / α-olefin copolymers, ethylene / vinyl acetate copolymers, and ethylene / acrylic acid copolymers. A polymer, an ethylene / acrylic acid ester copolymer, polypropylene or a copolymer thereof can be used.

  Lamination of the sealant layer can be performed by forming the above resin into a film and laminating by dry lamination method or extrusion lamination method, or by laminating the above resin by extrusion coating, etc. When the content easily penetrates into the sealant layer, it is preferable to laminate by a dry lamination method.

  Next, the manufacturing method of the bag with a spout of the present invention will be described.

  As described above, the bag with a spout of the present invention is a laminated film bag that hermetically wraps liquid contents, and a spout formed by a plastic molded body is attached to the top of the bag. Basically, the laminated film of the bag is provided with a pattern-like bulge for guiding the contents to the spout from at least the spout attachment portion toward the inside of the bag. The shape of the main body of the bag is preferable in that a standing pouch type or gusset pouch type bag is self-supporting, but is not particularly limited. For example, a bag of a three-side seal type, a four-side seal type, a pillow type, etc. There may be.

  Therefore, according to the shape of the main body of the bag, the bag embossing device or the heat press device for providing the bulge portion on the bag making machine for each shape is provided on the supply side of the laminated film. In addition, a thermal bonding apparatus for thermally bonding the spout to the inner surface of the upper portion of the bag can be additionally provided or separately provided, so that the bag can be manufactured by any method both inline and offline.

  Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples.

A bag with a spout formed by forming the bag body having the configuration shown in FIG. 2 in a standing pouch form was made of the following materials and dimensions to obtain a bag with a spout of Example 1.
(1) Material of bag with spout Configuration of laminated film for wall 1, 1 '(outside) Biaxially stretched polyethylene terephthalate film (hereinafter referred to as PET film) (thickness 12 μm) / adhesive / aluminum foil (thickness 9 μm) ) / Adhesive / biaxially stretched nylon film (hereinafter referred to as ON film) (thickness 15 μm) / adhesive / linear low-density polyethylene film (hereinafter referred to as L / LDPE film) (thickness 100 μm)
Composition of laminated film for bottom surface (outside) PET film (thickness 12 μm) / adhesive / aluminum foil (thickness 9 μm) / adhesive / ON film (thickness 15 μm) / adhesive / L / LDPE film (thickness 70 μm)
The above films were all bonded by the dry lamination method, and the adhesive between the films was a dry laminate adhesive such as a two-component curable polyurethane adhesive. .

The spout 20 was produced by injection molding high density polyethylene (hereinafter referred to as HDPE), and the cap 30 was also produced by injection molding HDPE.
(2) Dimensions of bag body The bag had a total width of 160 mm, a total length of 220 mm, and a folding length of the bottom gusset portion 4 of 45 mm.

  The bulging portion S has a length from the lower portion of the attachment portion of the spout 20 of the front and rear wall laminated films 1 and 1 ′ to the upper portion of the gusset portion 4 vertically downward, the width of the rod-like portion is 5 mm, and its maximum height Was provided to be 2 mm.

A bag with a spout formed by forming the bag body of the configuration shown in FIG. 3 into a gusset pouch form was made of the following materials and dimensions to obtain a bag with a spout of Example 2.
(1) Material for bags with spouts Bags were made using a method in which the front and rear laminated films for the wall and the left and right laminated films were made using different pieces of laminated films. The laminated film having the following configuration was commonly used.

Structure of the laminated film of the bag (outside) PET film (thickness 12 μm) / adhesive / aluminum foil (thickness 9 μm) / adhesive / ON film (thickness 15 μm) / adhesive / L / LDPE film (thickness 80 μm)
In this case as well, the above films were all bonded by the dry lamination method, and the adhesive between the films was a dry laminate adhesive such as a two-component curable polyurethane adhesive. It is what.

The spout 20 and the cap 30 were both made by injection molding HDPE, as in Example 1.
(2) Dimensions of the bag body The bag had a total width of 140 mm, a total length of 220 mm, and the folding widths of the left and right gusset portions 4a and 4b were both 40 mm.

The bulging portion S has a length from the lower portion of the attachment portion of the spout 20 of the front and rear wall film 1, 1 ′ vertically downward from the lower end of the bag to 50 mm and the width of the rod-shaped portion is 5 mm, the maximum The height was set to 2 mm.
[Comparative Example 1]
In the configuration of the bag with the spout of Example 1, all of the same processing as in Example 1 was performed except that only the bulging portions S provided on the front and rear laminated films 1 and 1 ′ were removed. A bag with a spout was produced.

(Test and results)
In order to evaluate the bags with spouts of Examples 1 and 2 and Comparative Example 1 produced as described above, each bag with spouts was filled with about 800 ml of liquid shampoo as the contents, and the bags were sealed. In addition, the bag with a spout of Example 2 bent the bottom seal part to one side and fixed it with an adhesive seal to form a flat bottom surface.

  The packaging bodies made of bags with spouts of Examples 1 and 2 and Comparative Example 1 produced as described above had stable self-supporting properties.

  Then, as a result of performing a test of transferring the contents of each package into half a half and transferring it to a bottle with a dedicated discharge pump, the first transfer of Examples 1 and 2 and Comparative Example 1 In each package, the contents were successfully poured out from the spout and transferred, and after the pouring, re-sealing with a cap could be easily and reliably performed.

  After that, when the second transfer was performed in the same manner, in the packaging bodies of Example 1 and Example 2, the remaining amount of the contents decreased, and even when the bag was flattened, the bag wall was laminated. Since the film-like bulge portion S is provided in the film 1, 1 'in the region from the bottom of the spout attachment portion to the bottom and vertically downward, the inner surface of the laminated film 1, 1' The swelled portion S can form a liquid passage and can guide the content from the bottom side to the spout without moving the contents smoothly. I was able to change.

  On the other hand, in the package of Comparative Example 1, since the bulging portion S is not provided on the laminated film 1, 1 ′ for the wall surface of the bag, the laminated film 1, It was not preferable in that the inner surfaces of the 1 'were easy to adhere to each other, the flow of the contents to the spout was hindered, and it was difficult to transfer to the end.

  Further, in the bag with the spout of Examples 1 and 2, the pouch is not provided with a rib for preventing clogging of the pouch as in the prior art, and instead, the bulging portion S is formed on the laminated films 1 and 1 'on the wall surface of the bag. It is provided, and the spout can be made smaller and the cost can be reduced by removing the blockage prevention ribs, and the bag can be folded flat when the used bag is discarded. Can contribute to volume reduction.

  Applications of the bag with a spout of the present invention include, for example, various beverages, liquid seasonings, cooking oil, other shampoos, conditioners, household liquid detergents, etc. It can be suitably used as a packaging container for refilling and used, and is not particularly limited.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure of an example of the spout attached to the bag with a spout of this invention, and a cap, (A) is a front view of a spout, (B) is a bottom view of a spout, (C) is the front of a cap. FIG. It is a front view which shows the structure of the 1st Example of the bag with a spout of this invention. It is a front view which shows the structure of the 2nd Example of the bag with a spout of this invention. (A), (B), (C), (D), and (E) are main parts that show an example of the shape of the pattern-like bulge provided on the laminated film on the wall surface of the bag with a spout of the present invention. It is a front view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1 'Laminated film 2 Bottom film folding | returning part 3 Bottom film notch part 4, 4a, 4b Gusset part 5 Bottom seal part 6, 6a, 6b, 6c, 6d Side seal part 7 Upper seal part 8 Adhesive base seal part 9a, 9b Folded-up folded portion S Swelling portion 20 Spout 21 Tube portion 22 Adhesive base 23, 23a, 23b Flange 24 Screw portion 25 Spout base side opening 30 Cap 31 Top plate 32 Peripheral wall 33 Groove 100, 200 Bag with spout

Claims (4)

  In a laminated film bag for hermetically wrapping liquid contents, a spout formed by a plastic molded body is attached to the top of the bag, and at least from the attachment portion of the spout to the laminated film of the bag. A pouch with a spout characterized by having a pattern-like bulge for inwardly guiding the contents to the spout.   The spout is of a type that opens and closes with a screw cap, and a screw portion for mounting the screw cap is provided on the outer periphery on the tip side with a cylindrical tube portion as a center, and an intermediate portion Is provided with one or more flange portions, and the base portion is formed in a shape in which a cross section having a width larger than the diameter of the cylindrical portion is provided with a hook-shaped adhesive base portion, and the adhesive base portion and the bag The bag with a spout according to claim 1, wherein the bag is attached to the bag by thermal bonding with the inner surface.   The said pattern-like bulging part is provided in the continuous shape which forms a liquid flow path from the attachment part of a spout to the center lower part and / or peripheral part of a bag, The Claim 1 or 2 characterized by the above-mentioned. The bag with the spout described.   The bag with a spout according to any one of claims 1 to 3, wherein the bag is a standing pouch type bag or a gusset pouch type bag.

Images