JP4638789B2 - Bag with spout - Google Patents

Description

  The present invention relates to a bag with a spout portion, more specifically, in a bag with a spout portion provided with a narrow spout portion at one end of a laminated film bag, on the inner surface of the laminated film of the spout portion, With a spout part that improves the opening of the spout part and its shape retention by attaching a simple spout auxiliary member and thermoforming it, so that the contents filled in the bag can be poured out easily. Regarding bags.

Conventionally, as a container for refilling that is used by sealing and wrapping liquid contents such as liquid and transferring the contents to other containers such as bottles when using the contents, other contents It is desirable that the transfer to the container can be performed easily and safely, and at the same time, it is desirable that the empty container is not bulky and can be easily disposed of after use, etc. A bag having a narrow spout portion formed by heat-sealing the outer periphery has been used on a part of the periphery of a bag such as a formed flat bag or a self-supporting bag.
However, such a bag with a spout portion is preferable in terms of low cost and excellent productivity, but the spout portion and the shape retaining property of the spout portion are poor, and the spout portion is in the middle of pouring the contents. However, there was a problem that the contents were poorly sealed.

In order to solve such a problem, various improvement measures have been studied, and a bag with improved contents pouring aptitude such as the opening property of the spout part and the shape retaining property of the opening part has been proposed.
As a specific example, for example, (1) a groove-like depression for forming a flow path is provided in the film material of the spout portion of the bag, and a small tube made of plastic or the like is fixed to the groove-shaped depression, and the flow path There is a bag which prevents the crushing and allows the contents to be emptied through the small tube (see Patent Document 1).
Also, (2) a pour-out part is provided in a part of the upper part of the pouch, and a reinforcing member is formed on the inner surface of the pour-out part so that it has a flat shape when mounted and can be raised in a cylindrical shape when used to open the spout part There is a refillable pouch attached (see Patent Document 2).
JP-A-5-132069 (pages 2 to 3, FIG. 1) Japanese Patent Laid-Open No. 11-79195 (pages 2 to 7, FIGS. 1 and 3)

According to the bag of the invention described in the above (1), a groove-like depression is provided as a flow path in the film material of the spout portion, and a small tube such as a plastic molded body is fixed to the depression. The small tube is hard and can reliably prevent the passage from being crushed, and the contents filled in the bag can be poured out through the small tube.
However, even in such a bag, since the film material of the spout portion is provided with a groove-like depression by deep drawing or the like, and the small pipe is inserted therein and fixed by spot welding or the like. The number of manufacturing steps increases, the manufacturing apparatus becomes complicated, and at the same time the production speed is suppressed. In addition, the small tube is cylindrical and hard, and its outer diameter is required to be about 5 mm or more, so that only the bag spout is bulky, making it difficult to handle and store empty bags. A special device is also required for the empty bag supply device in the filling and sealing machine when filling things, and there are many factors that increase costs such as an increase in equipment costs and a reduction in production speed as a whole. Since it was hard, there was a problem that the film material of the bag was easily damaged at the end.

Further, according to the refillable pouch of the invention described in (2) above, a spout part is provided in a part of the upper part of the pouch, and the inner surface of the spout part has a flat shape at the time of mounting. Since a reinforcing member that can be raised in a cylindrical shape to open the spout portion is attached, the reinforcing member is shown in A-1, B-1, and C-1 in FIG. 3 using a rigid sheet such as plastic. In this state, the reinforcing member is flat in this state, and the reinforcing member is stuck to the inner surface of the spout portion at a predetermined portion and, for example, pressed from both sides toward the center portion during use. As shown in FIGS. 3A-2, B-2, and C-2, the pouch for refilling is formed in a square shape and can open the spout portion into a rectangular tube shape with good shape retention. Can do.
However, even with such a refillable pouch, if the storage period is longer than several months after manufacture, the raising torque of the reinforcing member gradually increases, and there is a problem that it becomes difficult to raise the spout portion into a rectangular tube shape during use. It was not always satisfactory.

  The present invention has been made in order to solve such problems, and the problem is that when the contents having fluidity such as liquid are sealed and used, the contents such as bottles are used. In the field of bags with spouts used for transfer to other containers, opening a spout by attaching a simple spout assisting member to the inner surface of the laminated film at the spout of the bag The shape and shape retention can be improved with certainty, the laminated film of the spout is not damaged, and the clogging of the base of the spout can be prevented. It is another object of the present invention to provide a bag with a spout portion with high productivity that can reliably and easily pour out the contents filled in the bag.

The above problems can be solved by the following present invention.
That is, the invention described in claim 1 is a bag with a spout portion provided with a narrow spout portion at one end of a laminated film bag, and at least one side of the laminated film on both sides of the spout portion. A tape-shaped extraction auxiliary member having a protrusion provided on at least one side edge is attached to the inner surface of the laminated film, and at least in the region of the outlet portion, the extraction auxiliary member and its The outer laminated film is formed of a bag with a spout part, which is thermoformed and welded in a bowl shape that swells outward.

In the present invention, the form of the bag is not particularly limited. For example, in addition to a flat pouch type bag such as a three-side seal type, a four-side seal type, or a pillow type, any type of bag such as a standing pouch type bag may be used. .
In addition, the tape-like dispensing auxiliary member that is attached to the inner surface of the bag outlet portion is temporarily attached to the inner surface of the laminated film of the outlet portion with a spot seal or the like, and then laminated outside. Together with the film, it is thermoformed into a bowl shape that swells outward, and the two are welded together. Accordingly, the dispensing auxiliary member must be capable of thermoforming and at the same time be heat-bondable with the innermost layer (sealant layer) of the laminated film. It is preferable to form at least the surface that is formed of a single body or a laminated body and is attached to the laminated film of the bag with a polyolefin-based resin that can be thermally bonded to the sealant layer of the laminated film.

  The protrusions provided at the edge of at least one side of the tape-shaped extraction auxiliary member are, for example, a bag outlet portion while feeding out a long winding auxiliary member and cutting it into a predetermined length. When adhering to a predetermined position, it acts as a feed guide, prevents meandering and the like to increase positioning accuracy and enhances the rigidity of the pouring auxiliary member in the flow direction. It is provided to prevent blockage due to bending of the portion, and when the cross section is rectangular, its width and height are each suitably about 0.5 to 2 mm. Such ridges may be provided only at one end edge of the extraction assisting member, but more preferably provided at both end edges.

The length of such a pouring auxiliary member may be the length from the opening position on the tip side of the spout portion to the vicinity of the base portion of the spout portion, but further from the base portion of the spout portion toward the center of the bag. By providing the length extended by about 10 to 30 mm, it is possible to prevent the spout portion from being blocked by bending near the base portion of the spout portion.
Moreover, although the pouring auxiliary member may be provided only on the single-sided laminated film of the bag outlet portion, it is more preferably provided on the inner surface of the double-sided laminated film. Are facing each other, and the spout portion as a whole can be opened in a cylindrical shape with good shape retention.

  The invention described in claim 2 is such that the dispensing auxiliary member is formed of a laminate of two or more layers, and the layer on the side attached to the spout portion of the bag is formed of a thermoadhesive resin, and vice versa. The side layer is formed of a resin having a melting point higher than that of the heat-adhesive resin.

  The invention described in claim 3 is the bag with a spout part according to claim 1 or 2, wherein the pouring auxiliary member is colored.

  The invention described in claim 4 is the bag with a spout part according to any one of claims 1 to 3, wherein an easy-opening means is provided at an opening position of the spout part.

  As the easy-opening means, in addition to a cut line by printing, a display instructing opening of characters, symbols, etc., there are notches, half-cut lines, etc., either of which may be used alone, For example, it is more preferable to use a combination of a plurality of cut lines, notches and half-cut lines by printing.

  The invention described in claim 5 is characterized in that the bag is a standing pouch type bag, and the spout portion is provided at one corner of the upper portion of the bag. It consists of a bag with a spout part in any one.

  The standing pouch itself is already well known, but the bottom of the bag is formed in a form having a gusset part formed by inserting the bottom film back inside between the lower parts of the front and back wall films, and folded inside. A bottom film cutout portion such as a semi-circular shape is provided near the lower ends of both sides of the bottom film, and the bottom portion of the bottom-shaped seal pattern in which the inside of the gusset portion is concave in a curved line shape from both sides to the center portion The bag body is formed by heat-sealing the edge portions on both sides of the front and rear wall films with side seal portions having a predetermined width.

According to the invention described in claim 1, in the bag with the spout portion, the bag with the spout portion is provided with a narrow spout portion at one end of the laminated film bag. Of the laminated film, at least one side of the laminated film has an inner surface of the laminated film and a tape-shaped dispensing auxiliary member provided with protrusions on at least one side edge, and at least in the region of the outlet. Since the extraction assisting member and the laminated film on the outside thereof are thermoformed and welded in a bowl shape that swells outward, the following effects can be obtained.
(1) Since the tape-like extraction auxiliary member is provided with protrusions on at least one side edge portion, for example, a winding-like long extraction auxiliary member is drawn out to a predetermined length. Even when sticking to a predetermined position of the bag spout while cutting, it can prevent meandering and the like, increasing the positioning accuracy and increasing the rigidity of the pouring auxiliary member itself in the flow direction. Occlusion due to bending of the spout portion thus made can be further effectively prevented.
(2) The bag with the spout part is formed of a laminated film, and the spout auxiliary member is attached to the spout part, and the spout auxiliary member and the laminated film on the outside thereof are Because it is thermoformed and welded in a bowl shape that bulges outward, even liquid contents can be safely sealed and packaged, and when removing the contents, the tip of the spout is cut off at the opening position and opened. By simply doing, the spout part automatically opens in a bowl shape with good shape retention, and the contents can be poured out smoothly.
The tape-shaped dispensing auxiliary member can adjust the thickness appropriately, and the material is not particularly hard, so it does not damage the laminated film of the bag, and the spout portion molded in a bowl shape is Although there is some molding return over time, most of the molding is maintained, so that the opening of the spout portion does not deteriorate.
(3) Moreover, the said auxiliary | assistant auxiliary | assistant member is affixed on the inner surface of the laminated film of both surfaces of a spout part, and each is formed in the shape of a bowl which swells outside, and is welded by welding. Since the portions can be made to face each other, the spout portion can be opened as a whole in a cylindrical shape or the like with good shape retention, and the contents can be poured out more smoothly.
(4) The extraction assisting member is provided at a length from the opening position on the distal end side of the spout portion to the vicinity of the base portion of the spout portion, thereby improving the opening performance of the spout portion and its shape retention. Furthermore, by providing a length that extends about 10-30mm from the base of the spout portion toward the center of the bag, it is possible to prevent the spout portion from being blocked by bending near the base of the spout portion. Therefore, the contents can be poured out more reliably and smoothly.

  According to the invention described in claim 2, in the configuration of the bag with the spout part of the invention described in claim 1, the spout auxiliary member is formed of a laminate of two or more layers, and the spout part of the bag Since the layer on the side to be adhered to is formed of a heat-adhesive resin and the opposite layer is formed of a resin having a melting point higher than that of the heat-adhesive resin, the invention according to claim 1 is used. In addition to the function and effect, the extraction assisting member is attached to the inner surface of the spout outlet portion of the bag with a spot seal or the like, and the extraction assisting member and the outer laminated film are thermoformed into a bowl shape that swells outward. When performing welding, thermal bonding at a higher temperature, thermoforming and welding can be performed, and the processing speed can be further increased.

  According to the invention described in claim 3, in the configuration of the bag with the spout portion according to the invention described in claim 1 or 2, the extraction assisting member is colored. In addition to the effect of the described invention, after sticking this pouring auxiliary member to the spout part of the bag, the presence / absence of the sticking or poor position is detected by optical means to automatically remove the defective product. Therefore, the quality control related to the dispensing auxiliary member of the bag with the spout portion attached with the dispensing auxiliary member can be performed more reliably.

  According to the invention described in claim 4, in the configuration of the bag with the spout part according to any one of claims 1 to 3, an easy-opening means is provided at the opening position of the spout part. Therefore, in addition to the function and effect of the invention described in any one of claims 1 to 3, when using the contents filled in the bag with the spout portion, the ease of being provided at the opening position of the spout portion. By using the unsealing means, the spout can be easily opened at the correct position.

According to the invention described in claim 5, in the configuration of the bag with the spout portion according to any one of the first to fourth aspects, the bag is a standing pouch type bag, and the spout portion is the bag. Since it is the structure provided in one corner part of the upper part of a bag, in addition to the effect of the invention in any one of Claims 1 thru | or 4, the bag was provided with the outstanding self-supporting property, and its handling was easy In addition, the appearance is excellent and the contents can be packaged in a compact manner.
Moreover, since the said spout part is provided in one corner part of the upper part of this bag, at the same time, the part which does not have the spout part is provided in the upper part of the bag. Since it can be used as a filling port for the contents, the filling port can have a relatively wide width, and the contents can be filled easily.

Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to these drawings unless it exceeds the gist.
FIGS. 1-4 is an enlarged view which shows the structure of an example of the tape-shaped extraction assistance member which sticks and uses for the spout part of the bag with a spout part of this invention, respectively. ) Is a schematic plan view thereof, and (b) is a schematic cross-sectional view taken along line AA of (b).
FIG. 5 shows a manufacturing process of a bag with a spout part according to the present invention. After a spout auxiliary member is attached to the inner surface of the laminated film of the spout part, the spout auxiliary member and the outer laminated film are expanded outward. It is a figure of the principal part which shows the structure of an example of the shaping die used when heat-molding and welding to a bowl shape, (A) is a perspective view which shows the state when the male type | mold and the female type | mold leave | separated (B) is a sectional view showing a state when a pouring auxiliary member and a laminated film are inserted between a male mold and a female mold and hot press molding is performed.
(A), (b), (c), and (d) of FIG. 6 are each a bag that bulges the pouring auxiliary member of the spout part of the bag with the spout part of the present invention and the laminated film outside thereof. It is sectional drawing which shows the example of the bulging shape at the time of thermoforming to a shape.
7 and 8 are schematic front views showing the configuration of an embodiment of the bag with a spout portion according to the present invention.
9 is a cross-sectional view taken along line AA of the spout portion of the bag with spout portion shown in FIGS. 7 and 8, and FIG. 9A shows only the inner surface of the laminated film on one side (front surface) of the spout portion. It is sectional drawing which shows an example of the bulging shape at the time of sticking a pouring auxiliary member to thermoforming, (B) sticking a pouring auxiliary member on the inner surface of the laminated film of both surfaces of a spout part It is sectional drawing which shows an example of the bulging shape at the time of thermoforming.

The extraction assisting member 50a shown in (a) and (b) of FIG. 1 is one side (right side in the drawing) of the edge portions on both sides of one surface of the long and predetermined width of the base sheet portion 51. This is constructed by providing a ridge 52a at the end edge portion.
The extraction assisting member 50b shown in FIGS. 2 (a) and 2 (b) is provided with protrusions 52a and 52b at both end edges of one surface of the long and predetermined width of the base sheet portion 51. It is composed.

3 (a) and 3 (b), the extraction assisting member 50c shown in FIG. 3 has the structure of the extraction assisting member 50a shown in FIG. And b layer.
Also, the extraction assisting member 50d shown in FIGS. 4 (a) and 4 (b) has the base sheet portion 51 shown in (b) in the configuration of the extraction auxiliary member 50b shown in FIG. It is formed by a laminate of two layers of a layer and b layer.

In the configuration of the extraction assisting member shown in FIGS. 1 to 4, the width of the base sheet portion 51 may be appropriately determined according to the width of the bag outlet portion, and the thickness is not particularly limited. However, about 0.15 to 1 mm is appropriate.
The protrusions 52a and 52b provided on the edge portions on one side or both sides of the base sheet portion 51 are shown as having a rectangular cross section in the figure, but the upper portion may have a round shape or the like. As described above, the height is suitably about 0.5 to 2 mm.

Moreover, regarding the layer structure of the base material sheet portion 51 of the extraction assisting member, in the figure, the case of a single layer and the example of the two-layer structure of the a layer and the b layer are shown. In the case where the adhesiveness between the two is insufficient in the layer configuration, an adhesive improvement layer can be further provided between the two so that a three-layer configuration can be obtained.
In the case where the base sheet portion 51 is a single layer, the sealant layer of the laminated film of the bag and the low-density polyethylene having thermal adhesion, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-α Olefin copolymer, ethylene-vinyl acetate copolymer, ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer Preferably, it is formed of a polymer, an ethylene copolymer such as an ionomer, a polypropylene, a propylene copolymer, or a polyolefin resin such as a blend resin thereof. The layer b thermally bonded to the sealant layer of the laminated film is made of the polyolefin resin. Form, a layer of the opposite side, it is preferable to form a high melting point than the resin of the b layer resin.
For the a layer, a polyolefin resin having a higher melting point than the polyolefin resin used for the b layer may be selected and used, but a resin having a higher melting point than the resin of the b layer and having thermoformability. If there is, it will not specifically limit, Polyesters, such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyamides, such as various nylon, 4-methyl pentene-1 resin, polycarbonate, etc. can be used.
Further, the material of the ridges 52a and 52b is not particularly limited. However, when the base sheet portion 51 is a single layer, it is preferable to form the same with the same resin from the viewpoint of easy production. When the material sheet portion 51 has a two-layer or three-layer configuration, it is preferably formed of the same resin as the a layer or b layer.

Even when the dispensing auxiliary member is colored for the purpose of quality control, when the base sheet portion 51 has a laminated structure of two or more layers, for example, any layer such as the a layer may be colored. Cost increase can be suppressed as compared with coloring. Further, the color to be colored is not particularly limited as long as it is a color that can be detected optically, but, for example, blue, red, and the like can be suitably used.
The above-mentioned extraction assisting member is prepared in a long winding shape, and when pasting to the spout portion of the bag, it is cut and pasted to a predetermined length while being pulled out from the winding In addition, it is preferable to heat form and weld in a bowl shape. By adopting such a method, the length of the extraction assisting member can be set to any length every time it is used, and the extraction assisting member is affixed to the bag outlet port in-line with the bag making. Since it becomes easy to weld and thermoforming and welding, the bag with the spout portion can be manufactured with high productivity.
Although the manufacturing method of such an extraction | pouring auxiliary member is not specifically limited, For example, it can manufacture with sufficient productivity by the single-layer or multi-layered extrusion molding method.

As a specific example of forming the base sheet portion 51 with a laminate of two or more layers, when forming with two layers, for example, the layer b on the side thermally bonded to the spout portion of the bag is made of low-density polyethylene. The a layer on the opposite side can be formed of a medium density polyethylene layer. In the case of forming with three layers, for example, the b layer on the side to be thermally bonded to the spout portion of the bag is formed of low density polyethylene, and the a layer on the opposite side is formed of a polypropylene layer, Can be formed of a layer of an adhesive resin such as a propylene copolymer that improves the adhesion between the two.
In the present invention, the method of first sticking the pouring auxiliary member to the spout portion of the bag can be spot-laminated using an adhesive such as a hot melt adhesive. Since it is thermoformed into a shape and welded, it is more preferable to stick by a heat bonding method such as spot seal in terms of low manufacturing cost and excellent productivity.

FIG. 5 shows a manufacturing process of a bag with a spout part according to the present invention. After a spout auxiliary member is attached to the inner surface of the laminated film of the spout part, the spout auxiliary member and the outer laminated film are expanded outward. It is a figure of the principal part which shows the structure of an example of the shaping die used when heat-molding and welding to a bowl shape, (A) is a perspective view which shows the state when the male type | mold and the female type | mold leave | separated (B) is a sectional view showing a state when a pouring auxiliary member and a laminated film are inserted between a male mold and a female mold and hot press molding is performed.
A molding die 20 shown in FIG. 5A is used for hot press molding, and a male die 21 having a semi-cylindrical molding convex portion and a female die 22 having a semi-cylindrical molding concave portion. Between the male mold 21 and the female mold 22, a pouring auxiliary member 50 is adhered to the inner surface of the laminated film 1 or 1 ′ of the bag spout portion with a spot seal or the like, and preheated in advance. The object to be molded is introduced, heated and pressurized by the male mold 21 and the female mold 22, and as shown in the cross-sectional view (b), the central portion is semi-cylindrical along the flow direction of the pouring auxiliary member 50. In addition to thermoforming so as to swell outwardly, the pouring auxiliary member 50 and the laminated film 1 or 1 'outside thereof are welded.
In addition, in the figure, the arrangement | positioning by which the protruding item | line 52a, 52b was provided in the edge part of the both sides of the base material sheet part 51 like the extraction assistance member 50b shown in FIG. 2 as the extraction assistance member 50 was shown. However, in addition to the configuration shown in FIGS. 1 to 4, any configuration of the extraction assisting member may be used, such as the base sheet portion 51 formed of a three-layered laminate (not shown).
In addition, the shape of the hot press molding part of the male mold 21 and the female mold 22 is not limited to the semi-cylindrical molding convex part and concave part as shown in the figure, but may be a shape that can be formed into a bowl shape that bulges the molding part outward. Any shape can be used. For example, as shown in FIG. 6, the cross section can be formed into a trapezoidal shape, a triangular shape, or a semicircular shape having corrugated irregularities on the surface.

(A), (b), (c), and (d) of FIG. 6 are each a bag that bulges the pouring auxiliary member of the spout part of the bag with the spout part of the present invention and the laminated film outside thereof. It is sectional drawing which shows the example of the bulging shape at the time of thermoforming to a shape, (A) is the shape shape | molded in the bowl shape whose cross section becomes a semicircle, (B) is the shape shape | molded in the bowl shape whose cross section becomes a trapezoid. , (C) shows a shape formed in a bowl shape with a triangular cross section, and (d) shows a shape formed in a bowl shape with a corrugated uneven surface on the surface. Any shape may be adopted, and a shape obtained by deforming these may be used.
Also in this case, as the extraction assisting member 50, a configuration in which the ridges 52a and 52b are provided on the edge portions on both sides of the base sheet portion 51 as in the extraction assisting member 50b shown in FIG. However, in addition to the configuration shown in FIGS. 1 to 4, any configuration of the extraction assisting member may be used, such as the base sheet portion 51 formed of a three-layered laminate (not shown).

FIG. 7 is a schematic front view showing the configuration of the first embodiment of the bag with spout portion of the present invention.
The bag with spout part 100 shown in FIG. 7 is manufactured using a four-sided seal type bag, and the side edge seals on both sides of the front and rear wall films (laminated films) 1, 1 ′ are provided. 6a and 6b are heat-sealed, a narrow outlet 10 is formed in the center of the upper part, and the outer periphery thereof is heat-sealed with the outlet 7 and the notches 9a and 9b are formed on both sides thereof. A tape-like pour-out with protrusions provided on the inner surface of the laminated film 1 on at least one surface (front surface) of the spout port 10 in this case, and provided with a protruding line on the both ends. The center of the bag 100 is about 15 mm from the line B indicating the base of the spout part from the position slightly inside the opening position on the tip side along the center line C of the spout part 10 in advance. Sticking to the length up to the position toward the part, its extraction assistance part 50 and the outer laminated film are thermoformed in the shape of a swell that swells to the outside, and the two are welded together. Further, at the opening position on the distal end side of the spout 10, a half-cut wire is provided as an easy-opening means. 11 and notches 12a and 12b at both ends thereof.
The lower edge of the bag 100 is heat-sealed by the lower seal part 13, but this part is used as a filling port for the contents, so that it is an unsealed opening before filling the contents, Heat-sealing after filling the contents.

As the above-mentioned extraction auxiliary member 50, the base sheet portion 51 is a three-layered laminate as described above in addition to the extraction auxiliary members 50a to 50d configured as shown in FIGS. You may use the extraction | pouring auxiliary member of any structures, such as what was formed.
The half-cut line 11 is shown as three parallel half-cut lines. However, the half-cut line is not particularly limited, and may be one or two. As a countermeasure when moving away from the center, a plurality of half-cut lines such as one to three on each side of the center half-cut line are parallel or converged to the center half-cut line, or a plurality of parallel Can be provided in any shape, such as a combination of a half-cut line and an oblique half-cut line that obliquely intersects the half-cut line.
The method of providing such a half-cut line is preferable in that the laser beam irradiation method is provided at a stable depth even on the uneven surface, and a plurality of half-cut lines can be easily provided in an arbitrary shape. .

FIG. 8 is a schematic front view showing the configuration of the second embodiment of the bag with a spout portion of the present invention.
The bag with spout portion 200 shown in FIG. 8 is manufactured using a standing pouch-type bag, and the bottom of the bag is placed between the lower portions of the front and rear wall films (laminated films) 1 and 1 ′. The bottom film is folded inward and formed into a form having a gusset portion 4 that is inserted to the bottom film folding portion 2. In this case, a semicircular bottom film is cut in the vicinity of both lower ends of the bottom film folded inward. The notch portions 3a and 3b are provided, and the gusset portion 4 is formed by heat-sealing with a bottom-shaped bottom seal portion 5 which is concave in a curved line from the both sides to the center portion. The edge portions on both sides of the wall film (laminated film) 1, 1 ′ are formed by heat sealing with side seal portions 6 a, 6 b, and one corner portion on the upper side of the bag 200 (the left corner in the figure). ), A spout portion 10 having a tapered shape formed by heat-sealing the outer periphery thereof with a spout portion seal portion 7 and facing obliquely outward and upward is provided with notches 9a and 9b on both sides thereof. It is provided in the shape.
Further, in this case also, the tape-shaped dispensing auxiliary member 50 provided with ridges at both end edges is provided on the inner surface of the laminated film 1 on at least one surface (front surface) of the dispensing port 10 in advance. Affixed along the direction of the portion 10 to a length from a position slightly inside the opening position on the tip side to a position toward the center of the bag 100 about 10 to 15 mm from the base of the spout portion. The pour-out assisting member 50 is thermoformed into a bowl shape that swells outward together with the outer laminated film, and the two are welded together. Further, at the opening position on the front end side of the spout portion 10, an easy-opening property is provided. As a means, a half cut line 11 and a notch 12a are provided at the upper end thereof.
In addition, although the part which does not provide the spout part 10 among the upper part of the bag 200 is heat-sealed by the upper seal part 8, since this part is used for the filling port of the contents, before filling the contents, An unsealed opening is used and heat sealing is performed after filling the contents.

Also in this case, as the extraction assisting member 50, in addition to the extraction assisting members 50a to 50d having the configuration shown in FIGS. 1 to 4, the base sheet portion 51 is formed of a three-layer laminate. Any configuration of the extraction assisting member may be used.
Further, the half-cut line 11 is also shown by three parallel half-cut lines as in FIG. 7, but is not particularly limited as described above, and one or two half-cut lines 11 In addition, a plurality of half-cut lines such as one to three on each side of the center half-cut line are arranged in parallel or converge to the center half-cut line, or a plurality of parallel half-cut lines and this Can be provided in an arbitrary shape such as a shape combined with a half-cut line in an oblique direction intersecting obliquely.

Next, FIG. 9 is a cross-sectional view taken along line AA of the spout portion of the bag with spout portion shown in FIGS. 7 and 8, and (a) shows one side (front surface) of the spout portion 10. It is sectional drawing which shows an example of the bulging shape at the time of sticking the extraction auxiliary | assistance member 50 only on the inner surface of the laminated | multilayer film 1, and thermoforming, (B) is laminated | multilayer film 1, 1 'of both surfaces of the spout part 10 It is sectional drawing which shows an example of the bulging shape at the time of sticking the extraction | pouring auxiliary member 50 on the inner surface, and thermoforming.
The cross-sectional view taken along line AA of the spout portion 10 shown in (a) is a pouring auxiliary member 50 only on the inner surface of the front-side laminated film 1 among the laminated films 1 and 1 ′ before and after the spout portion 10. Is attached with a spot seal or the like, and then the dispensing auxiliary member 50 and the outer laminated film 1 are formed into a semi-cylindrical bowl shape that bulges outward using a molding die 20 as shown in FIG. A state in which the outer side of the spout part 10 is heat-sealed by the spout part seal part 7 by thermoforming and fusing both together, with the laminated film 1 ′ on the back side in a flat state superimposed on the inner face. It shows and the inside of the spout part 10 becomes a shape expanded in a semi-cylindrical shape.

In the cross-sectional view taken along line AA of the spout 10 shown in (b), the spout auxiliary member 50 is attached to the inner surfaces of both the laminated films 1 and 1 ′ before and after the spout 10 with a spot seal or the like. Thereafter, the pouring assisting member 50 and the outer laminated film 1 or laminated film 1 ′ are heated in a semicylindrical bowl shape that swells outward using a molding die 20 as shown in FIG. It shows a state in which both the laminated films 1 and 1 ′ are heat-sealed by the spout portion seal portion 7 while being molded and welded, and the inside of the spout portion 10 is greatly expanded in a cylindrical shape. Become.
The cylindrical expansion shape of the spout port 10 shown in (a) and (b) above is the above-described forming when the pouring auxiliary member 50 and the laminated films 1 and 1 'outside thereof are thermoformed in a bowl shape. By changing the shape of the mold 20, it is possible to easily change the shape as shown in FIGS.
Such a shape is obtained by thermoforming the front and back into the same shape when sticking the pouring auxiliary member 50 on the inner surfaces of the laminated films 1 and 1 ′ on both front and rear sides of the spout portion 10. In addition to the cylindrical body, the cylindrical body may be formed by combining different shapes (a) to (d) of FIG.

Next, as a laminated film used for the bag with a spout part of the present invention, a laminated film mainly composed of plastic is used, and in a simple configuration, a laminated film having a structure in which a sealant layer is laminated on a base film layer. However, it is necessary to use the contents to be filled in the bag, use conditions such as presence / absence of heat treatment after filling the contents, water vapor and other gas barrier properties, light shielding properties, various mechanical strengths, etc. Depending on the performance, a laminated film having a structure in which a water vapor or other gas barrier layer, a light shielding layer, a strength improving layer or the like is further laminated between the base film layer and the sealant layer can be used.
The base film layer, water vapor or other gas barrier layer, light shielding layer, strength improving layer, sealant layer, etc. may be formed as a single layer, or may be formed by laminating a plurality of layers. .

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

Examples of the gas barrier layer include saponified ethylene / vinyl acetate copolymer (EVOH), polyvinylidene chloride (PVDC), polyacrylonitrile (PAN), aluminum foil, silica, alumina, aluminum, and the like. A biaxially stretched nylon film (ON film), a biaxially stretched polyethylene terephthalate film (PET film), a biaxially stretched polypropylene film (OPP film) or the like provided with a vapor deposition layer or a PVDC coating layer 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.
As the strength improving layer, any one of the base films may be additionally laminated as appropriate, and a biaxially stretched high-density polyethylene film or the like may also be laminated 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, the gas barrier layer, the light shielding layer, and the strength improving layer.

The sealant layer includes low density polyethylene (LDPE), linear low density polyethylene (L / LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), ethylene-α olefin copolymer, ethylene-acetic acid. Vinyl copolymer, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-acrylic acid ester copolymer, ethylene-methacrylic acid ester copolymer, ionomer, polypropylene or its copolymer, etc. Can be used.
For the lamination of the sealant layer, the above resin can be formed into a film and laminated by a dry lamination method or an extrusion lamination method, or the above resin can be extruded and laminated. However, in the case where the content easily penetrates into the sealant layer, it is preferable to laminate by the dry lamination method.

Next, the manufacturing method of the bag with a spout part of this invention is demonstrated.
As described above, the bag with a spout part of the present invention is provided with a narrow spout part at one end of a laminated film bag, and the spout auxiliary member is attached to the inner surface of the spout part. In addition, the pour-out assisting member and the outer laminated film are characterized by being thermoformed and welded in a bowl shape that swells outward, and the form of the bag itself is not particularly limited. In addition to flat pouch type bags such as three-side seal type, four-side seal type and pillow type, any type of bag such as standing pouch type bags may be used.
Therefore, basically, using a bag making machine of the adopted type, a heat seal device for providing a spout portion on this, and a punching device for providing notches and notches on both sides of the spout portion A pouring auxiliary member attaching device that cuts the pouring auxiliary member into a predetermined length at the pouring port and sticks it in a spot shape, and the attached pouring auxiliary member and a laminated film outside thereof Easy to use the bag-making machine by adding a hot press molding device that heat-molds it into a bowl shape that swells outward and at the same time welds them together, and a laser beam irradiation device for providing a half-cut wire, etc. Can be manufactured.
Hereinafter, the present invention will be described more specifically with reference to examples.

A bag 200 with a spout part having the configuration shown in FIG. 8 is manufactured, and a bag with a spout part is manufactured with the following dimensions using a laminated film and a pour-out auxiliary member having the following configuration. This was a bag with a spout part.
(1) Structure of laminated film 1, 1 'for wall surface (outside) biaxially stretched nylon film (hereinafter referred to as ON film) (thickness 15 μm) / adhesive / aluminum deposition (deposition thickness 400 mm) biaxially stretched polyethylene terephthalate Film (hereinafter referred to as aluminum vapor-deposited PET film) (thickness 12 μm) / adhesive / linear low-density polyethylene film (hereinafter referred to as L / LDPE film) (thickness 120 μm)
(2) Composition of laminated film for bottom surface (outside) ON film (thickness 15 μm) / adhesive / aluminum-deposited PET film (thickness 12 μm) / adhesive / L / LDPE film (thickness 90 μm)
The above-mentioned films were bonded together by a dry lamination method, and the adhesive between the films was a two-component curable polyurethane adhesive for dry lamination.

(3) Configuration and dimensions of the pouring auxiliary member 50 The pouring auxiliary member 50 has the configuration shown in FIG. 4 with a total width of 11 mm and a length of 30 mm, the base sheet portion 51 has a two-layer configuration, and a ridge 52a. The layer a on the side provided with 52b is a medium density polyethylene layer (thickness 120 μm), and the layer b on the opposite side (layer attached to the spout part) is a low density polyethylene layer (thickness 120 μm). Was formed to be 240 μm. Further, the ridges 52a and 52b provided at the edge portions on both sides were formed such that the height including the base sheet portion 51 was 1.6 mm and the width was 1.5 mm.
The above-mentioned dispensing auxiliary member is produced by a modified co-extrusion molding method.
(4) Dimensions of bag 200 with spout portion and method of attaching spout assisting member 50 to spout portion 10 The bag has a total width of 135 mm, a total length of 225 mm, and the folding length of the bottom gusset portion 4 The thickness was 37 mm.
The spout portion 10 was provided in such a shape that the maximum portion of the shape shown in the spout portion seal portion 7 had a width of 40 mm and the maximum portion length was 55 mm. About the detail, the full width of the position which provided the half cut line 11 was 24 mm, and the taper angle of the spout part 10 was about 36 degrees.

The sticking position of the pouring auxiliary member 50 to the pouring port portion 10 is such that the tip side of the pouring port portion 10 is separated from the half-cut line 11 by about 1 mm inside, and from there toward the inside of the bag. It stuck by the length of 30 mm so that the centerline of the spout part 10 might be met.
Moreover, the sticking of the pouring auxiliary member 50 to the pouring port portion 10 is performed by spot sealing on the inner surfaces of the laminated films 1 and 1 ′ on both sides of the pouring port portion 10. The outer laminated films 1, 1 ′ were heat-press molded into a semi-cylindrical bowl shape swelled outward using a molding die 20 as shown in FIG. 5 and welded.
In addition, although the said hot press molding may heat-press-mold the whole length direction of the extraction auxiliary | assistant member 50 here, it is on the front end side of a spout part among 30 mm length of an extraction auxiliary member here. 2 mm and a length of 8 mm were left on the inner side of the bag, and only the intermediate 20 mm length was hot press-molded into a semi-cylindrical bowl shape.
The half-cut line 11 is provided with three parallel half-cut lines on both sides of the center half-cut line at intervals of 0.7 mm, respectively, and in a diagonal direction that obliquely intersects with the parallel half-cut line. Two half-cut lines were formed in an X shape.
The bag 200 with a spout part was produced as described above to obtain a bag with a spout part of Example 1.

  In the configuration of the bag with the spout portion of Example 1, the spout auxiliary member 50 is attached to the inner surfaces of the laminated films 1 and 1 ′ on both sides of the spout portion 10, and then the spout auxiliary member 50. Only the molding die used when the outer laminated film 1 and the outer laminated film 1 and 1 'are thermoformed and welded in the shape of a bowl that swells outward, as shown in FIG. A bag with a spout part of Example 2 was produced in the same manner as in Example 1 except that it was changed to a molding die that could be thermoformed into a shape and subjected to hot press molding.

  In the configuration of the bag with the spout portion of Example 1, the spout auxiliary member 50 is attached to the inner surfaces of the laminated films 1 and 1 ′ on both sides of the spout portion 10, and then the spout auxiliary member 50. As shown in FIG. 6 (c), only the molding die used when the outer laminated film 1 and the outer laminated film 1 and 1 'are thermoformed into a bowl shape that swells outward and welded is used. A bag with a spout part of Example 3 was produced in the same manner as in Example 1 except that it was changed to a molding die that could be thermoformed into a shape and subjected to hot press molding.

  In the configuration of the bag with the spout portion of Example 1, the spout auxiliary member 50 is attached to the inner surfaces of the laminated films 1 and 1 ′ on both sides of the spout portion 10, and then the spout auxiliary member 50. And the outer laminated films 1 and 1 ′, only the molding die used for thermoforming and welding in the shape of a swell that swells to the outside, as shown in FIG. A bag with a spout portion of Example 4 is produced in the same manner as in Example 1 except that the mold is thermoformed into a semicircular bowl with irregularities and can be thermoformed. did.

(Test and results)
In order to evaluate the pouring aptitude of the bag with the spout part of Examples 1, 2, 3, and 4 produced as described above, the contents from the unsealed upper seal part 8 to each bag with the spout part After filling about 400 ml of liquid detergent, the upper seal portion 8 was heat sealed to seal the bag.
The packaging bodies with bags with spout portions of Examples 1, 2, 3, and 4 produced as described above all had stable self-supporting properties, had good appearance, and were excellent in handleability.
In addition, in order to perform the dispensing suitability test of the liquid detergent filled in each package, the tip of the spout 10 of each package is picked and torn along the half-cut line 11 starting from the notch 12a, In any case, the spout portion 10 was able to be opened by tearing it cleanly along the half-cut line 11.
And simultaneously with opening of the spout part 10, although the shape of the opening part of each package is slightly different, the spout part 10 was automatically opened in a cylindrical shape with good shape retention.

  Next, the opened outlet 10 was inserted into the mouth of a separately prepared bottle (the inner diameter of the mouth was 26 mm), and the filled liquid detergent was poured out. The outlet 10 was not blocked in the middle, and the liquid detergent could be smoothly poured out to the end, which was excellent in the pouring aptitude.

  The bag with a spout part of the present invention includes, for example, various household liquid detergents used in bathrooms, toilets, kitchens, shampoos, conditioners, body soaps, liquid seasonings, cooking oils, various beverages It is particularly suitable as a packaging bag for refilling that is used by sealing the liquid contents and transferring them to other containers such as bottles when using the contents. There is no.

BRIEF DESCRIPTION OF THE DRAWINGS It is an enlarged view which shows the structure of the 1st example of the tape-shaped extraction assistance member stuck and used for the extraction port part of the bag with an extraction port part of this invention, (A) is the model top view, ( (B) is a schematic cross-sectional view taken along line AA of (A). It is an enlarged view which shows the structure of the 2nd example of the tape-shaped extraction assistance member used sticking to the extraction port part of the bag with an extraction port part of this invention, (A) is the model top view, ( (B) is a schematic cross-sectional view taken along line AA of (A). It is an enlarged view which shows the structure of the 3rd example of the tape-shaped extraction assistance member stuck and used for the spout part of the bag with a spout part of this invention, (A) is the model top view, ( (B) is a schematic cross-sectional view taken along line AA of (A). It is an enlarged view which shows the structure of the 4th example of the tape-shaped extraction assistance member stuck and used for the extraction port part of the bag with an extraction port part of this invention, (A) is the model top view, ( (B) is a schematic cross-sectional view taken along line AA of (A). In the manufacture of the bag with the spout part of the present invention, after sticking the pouring auxiliary member on the inner surface of the laminated film of the spout part, the pour auxiliary member and the outer laminated film are heated in a bowl shape that swells outward. It is a figure of the principal part which shows the structure of an example of the shaping die used when shape | molding and welding, (A) is a perspective view which shows the state when the male type | mold and the female type | mold leave | separated, (B) These are sectional drawings which show a state when a pouring auxiliary member and a laminated film are inserted between a male mold and a female mold and hot press molding is performed. (B), (b), (c), and (d) are respectively heated in a bowl shape that bulges the pouring auxiliary member of the spout part of the bag with the spout part of the present invention and the laminated film outside thereof. It is sectional drawing which shows the example of the bulging shape at the time of shape | molding. It is a model front view which shows the structure of the 1st Example of the bag with a spout part of this invention. It is a model front view which shows the structure of the 2nd Example of the bag with a spout part of this invention. It is AA sectional view taken on the line AA of the spout portion of the bag with spout portion shown in FIG. 7 and FIG. 8, (b) is a pouring aid only on the inner surface of the laminated film on one side (front surface) of the spout portion. It is sectional drawing which shows an example of the bulging shape at the time of sticking a member and thermoforming, (B) when sticking a pouring auxiliary member on the inner surface of the laminated film of both surfaces of a spout part, and thermoforming It is sectional drawing which shows an example of a bulge shape.

Explanation of symbols

1, 1 'wall film (laminated film)
2 Bottom film folding part 3a, 3b Bottom film cutout part 4 Gusset part 5 Bottom seal part 6a, 6b Side seal part 7 Spout part seal part 8 Top seal part 9a, 9b Cut part 10 Spout part 11 Half cut Lines 12a, 12b Notch 13 Lower seal part 20 Molding die 21 Male 22 Female mold 50, 50a, 50b, 50c, 50d Outlet auxiliary member 51 Base sheet part 52a, 52b Convex strip B Shows the base of the outlet part Line C Center line of spout 100, 200 Bag with spout

Claims (5)

  In a bag with a spout part provided with a narrow spout part at one end of a laminated film bag, at least one end of the laminated film on both sides of the spout part on the inner surface of the laminated film. A tape-shaped extraction assisting member provided with a ridge on the edge is attached, and at least in the region of the outlet, the extraction assisting member and the laminated film outside thereof are bulged outward. A bag with a spout part, which is thermoformed and welded into a shape.   The pouring auxiliary member is formed of a laminate of two or more layers, the layer on the side to be attached to the bag spout part is formed of a thermoadhesive resin, and the opposite layer is the thermoadhesive resin The bag with a spout part according to claim 1, wherein the bag is formed of a resin having a higher melting point.   The bag with a spout part according to claim 1 or 2, wherein the spout auxiliary member is colored.   The bag with a spout part according to any one of claims 1 to 3, wherein an easy-opening means is provided at an opening position of the spout part.   5. The pouch portion according to claim 1, wherein the bag is a standing pouch type bag, and the spout portion is provided at one corner of an upper portion of the bag. bag.

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