JP2015081124A - Packaging bag having opening maintenance member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging bag having an opening maintenance member having a flat outlet part and capable of assembling the opening maintenance member easily.SOLUTION: A packaging bag comprises an opening maintenance member having side plates individually formed through hinges on the two sides of a stationary plate. An extraction part 6 is formed of a tip end seal part 8, an upper seal part 9 and a lower seal part 11. An opening maintenance member 30 is inserted such that the side plate may be substantially parallel to the upper seal part and the lower seal part. The packaging bag with the opening maintenance member is characterized: in that, with respect to a perpendicular line 20 from the outer sides of the upper seal part and the lower seal part to the direction for pressing in the inner side direction, the inclination angles of an inner side 10 of the upper seal part and an inner side 12 of the lower seal part are within a range of ± 0° to ± 8°; and in that the distances between the outer side of the side plate, the inner side of the upper seal part and the inner side of the lower seal part are individually 0.7 mm or more.

Description

  The present invention relates to a refill packaging bag for liquid detergents, toiletries, fruit juice drinks, seasonings and the like. Specifically, the present invention relates to a packaging bag with an opening maintaining member that facilitates pouring of contents.

  In recent years, packaging bags for refilling various liquid contents have been widely used from the standpoints of environmental protection and resource saving. As a refillable packaging bag, there is a packaging bag with a spout portion that cuts and opens the tip of the spout portion during use and pours out the contents. Furthermore, in order to improve the ease of pouring the contents, there is one in which the spout portion is formed into a hollow cylindrical shape or a hollow semicylindrical shape (Patent Document 1). However, before filling the contents, the packaging bag body is flat, but the spout part has a three-dimensional structure, so the accumulation efficiency during distribution and storage is poor, and the contents are filled when filling the contents. Troubles on the conveyance of the packaging bag in the machine are likely to occur, and therefore a special conveyance device may be required.

  In addition, in order to improve this problem, there is a packaging bag with an opening maintaining member that can be one-touched in a three-dimensional structure in which the spout portion is flat and the spout portion is easily poured out when the contents are poured out ( Patent Document 2). For example, as shown in FIG. 7, a rectangular opening maintaining member 30 is inserted into the spout 6. Although the opening maintaining member is not shown in the drawing, a rectangular side plate is connected to both sides of the rectangular central plate via hinges, and one opening maintaining member is provided for each of the two hinges. An engagement claw that engages with both ends of the notch when the side plates on both sides are bent via hinges is provided so as to straddle the above rectangular notch.

  This is because the upper side seal part 9 and the lower side seal part 11 forming the spout part 6 are pressed with fingers from the outside to bend the side plates on both sides, the engagement claws are engaged, and a three-dimensional structure is formed with one touch. However, for example, the inclination angle A of the inner side 10 of the upper seal portion and the inner side 12 of the lower seal portion may be about ± 10 ° with respect to the perpendicular 20 with respect to the pressing direction C. . In such a state, the pressing force may escape to the side or slip easily, and it may be difficult to assemble the opening maintaining member.

  Therefore, there is a demand for a packaging bag with an opening maintaining member that has a flat spout portion and can be easily assembled by pressing with a finger from the outside of the spout portion toward the inside when pouring.

JP-A-8-2538 Japanese Patent No. 3608357

  In view of the problems of the background art as described above, the present invention has a spout portion tapered in the outer direction of the packaging bag at the upper corner, the spout portion is flat, and at the time of pouring, the spout portion An object of the present invention is to provide a packaging bag with an opening maintaining member that can be easily assembled by pressing with a finger from the outside to the inside.

  In order to solve the above-mentioned problems, the inventors have conducted intensive studies and completed the present invention.

The invention according to claim 1 of the present invention is a packaging bag having a spout portion tapered in the outer direction of the packaging bag at the upper corner.
In the spout portion, a rectangular side plate is connected to both sides of a rectangular fixed plate via hinges, and flat plate opening maintaining members for assembling the side plates via the two hinges are inserted. A packaging bag with an opening maintaining member,
The spout portion is formed of a tip seal portion, an upper seal portion, and a lower seal portion,
The opening maintaining member is inserted so that the side plate is substantially parallel to the upper seal portion and the lower seal portion;
Inclination angles of the inner side of the upper seal part and the inner side of the lower seal part with respect to a perpendicular to the direction pressing inward from the outside of the upper seal part and the lower seal part are ± 0 ° to ± 8 ° range,
The distance between the outer side of the side plate, the inner side of the upper seal part, and the inner side of the lower seal part is 0.7 mm or more, respectively.

  The packaging bag with an opening maintaining member of the present invention is such that the opening maintaining member is inserted and attached so as to be substantially parallel to the upper seal portion and the lower seal portion at the spout portion, and the upper seal portion and the lower seal The inclination angle of the inner side of the upper seal part and the inner side of the lower seal part is in the range of ± 0 ° to ± 8 ° with respect to the normal to the direction of pressing inward from the outside of the part, and the outside of the side plate When the distance between each side of the upper side seal portion and the inner side of the upper seal portion and the inner side of the lower seal portion is 0.7 mm or more, the opening maintaining member can be easily assembled. The force of pressing with a finger can be easily assembled without escaping to the side or slipping.

It is explanatory drawing which shows an example of the packaging bag with an opening maintenance member of this invention. It is explanatory drawing which shows a spout part. It is explanatory drawing which shows an example of an opening maintenance member. It is explanatory drawing which shows an example of the spout part which inserted and attached the opening maintenance member of FIG. It is explanatory drawing which shows the position of the opening maintenance member in a spout part. It is explanatory drawing which shows an example of the laminated constitution of a lamination sheet. It is explanatory drawing which shows the spout part of the conventional packaging bag with an opening maintenance member.

  Drawing 1 is an explanatory view showing an example of a packaging bag with an opening maintenance member of the present invention. An example is shown in which the spout portion 6 tapered in the outer direction of the packaging bag is provided in the upper corner portion, and the opening maintaining member 30 is inserted into the spout portion 6 in order to improve the ease of pouring. ing. In use, the easy-cut wire 7 is cut to remove the tip seal portion 8 and open a pouring hole. The packaging bag 1 with an opening maintaining member is composed of two front and back body sheets 2 and 2 and a bottom sheet 3. The trunk portion sheet 2 and the bottom portion sheet 3 are flexible sheets. The bottom sheet 3 is inserted between the lower part of the body sheet 2 while being folded, the bottom part is sealed and the bottom seal part 4 is sealed, and both sides are sealed to form the side seal parts 5 and 5, respectively. When the contents are filled, the bottom sheet 3 expands to become a self-supporting packaging bag. Moreover, the spout part 6 tapering in the diagonally outward direction is formed in the upper left corner of the packaging bag. An easy cut line 7 for opening the spout portion is formed at the tip of the spout portion 6. The spout portion 6 includes a tip seal portion 8, an upper seal portion 9, and a lower seal portion 11. The upper seal portion 9 is connected to the seal portion 14 that forms the tip seal portion 8 and the opening 13 of the top portion. Further, the lower seal portion 11 is connected to the tip seal portion 8 and the left side seal portion 5. A rectangular and flat opening maintaining member 30 is inserted into the spout portion 6 so as to be substantially parallel to the upper seal portion 9 and the lower seal portion 11.

  FIG. 2 is an explanatory view showing a spout portion. The opening maintaining member 30 is inserted substantially parallel to the upper seal portion 9 and the lower seal portion 11. The inclination angle A of the inner side 10 of the upper seal part and the inner side 12 of the lower seal part is ± 0 with respect to the perpendicular 20 to the direction C that is pressed inward from the outside of the upper seal part 9 and the lower seal part 11. When the angle is in the range of ° to ± 8 °, the opening maintaining member can be easily assembled by the force pressed by the finger. The pressing force can be concentrated on the opening maintaining member without letting it go sideways or slipping. Preferably, the inclination angle is in the range of ± 0 to ± 2 °.

  FIG. 3 is an explanatory view showing an example of the opening maintaining member. An example of a rectangular opening maintaining member is shown. FIG. 3A is a plan view. The opening maintaining member 30 includes a rectangular side plate 32 connected to both sides of a rectangular fixing plate 31 via hinges 34, and four rectangular cutouts 35, 35, 35 ', 35 'is provided across. When the side plates on both sides are bent inward via the hinges 34, the engagement projections 36 are engaged with the edge cross sections 37 of the side plates of the notches 35, 35 to form a three-dimensional shape. Further, an engaging claw 38 is provided on each of the fixing plates 31 of the notches 35 'and 35' and the side plate 32 of the notches 35 '. When bent, the respective engaging claws 38 are engaged to form a three-dimensional shape. The extending direction of the hinge is preferably parallel to the perpendicular. The opening maintaining member 30 has a flat plate shape and is made of plastic having rigidity.

  FIG. 3-2 shows a cross section taken along line MM ′ of FIG. A rectangular side plate 32 is connected to both sides of the rectangular fixed plate 31 via hinges, and each hinge is provided with a rectangular notch 35 straddling, and the side plates on both sides are bent upright inward. The engaging protrusions 36 are engaged with the edge cross-sections 37 of the side plates 32 of the notches 35.

  FIG. 4 is an explanatory view showing an example of a spout part into which the opening maintaining member of FIG. 3 is inserted. FIG. 4A shows an example in which the opening maintaining member 30 is inserted into the spout portion, and shows a cross section thereof. The spout part is formed by the upper seal part 9 and the lower seal part 11, and the opening maintaining member 30 is inserted therein. The side plates 32, 32 on both sides of the opening maintaining member 30 are opposed to the upper seal portion 9 and the lower seal portion 11. The fixing plate 31 is partly formed with an adhesive portion 39 with the body portion sheet 2 and is fixed in the spout portion. FIG. 4-2 shows an example in which the opening maintaining member is assembled, and shows a cross section thereof. A state in which the side plate 32 of the opening maintaining member is bent at a right angle inside by a force pressing inward from the outside of the spout portion, and the engagement protrusion 36 is engaged with the edge cross section 37 to show an assembled state. Yes. The state where the extraction hole 40 is formed is shown.

  FIG. 5 is an explanatory view showing the position of the opening maintaining member at the spout portion. The distance L between the outer side 33 of the side plate of the opening maintaining member and the inner side 10 of the upper seal part and the inner side of the lower seal part is shown. When the distance L is 0.7 mm or more, the force pressed by the finger does not escape sideways and does not slip, and the opening maintaining member can be easily assembled. If it is less than 0.7 mm, there is a surface which is difficult to assemble.

  Furthermore, the form for implementing this invention is demonstrated in detail.

  The form of the packaging bag with an opening member of the present invention is possible for a three-side sealed bag, a four-side sealed bag, a self-supporting packaging bag, and the like. This is possible as long as a spout portion tapering outward is formed in the upper corner of these packaging bags and an opening maintaining member is inserted.

The laminated sheet constituting the packaging bag is made of a flexible sheet. For example, when a self-supporting packaging bag is taken as an example, the trunk sheet and the bottom sheet are formed into a laminated sheet as shown in FIG. Become. The laminated sheet 50 has a layer configuration of base film layer 51 / adhesive layer 53 / sealant layer 52.

  As the base film layer 51, a heat-resistant plastic film can be used. For example, polyester films such as polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT), polyolefin films such as polyethylene (PE) and polypropylene (PP), polyamide films (PA), polystyrene films (PS) ), Polycarbonate film (PC), polyacrylonitrile film (PAN), polyimide film (PI), polyvinyl alcohol (PVA), polyvinylidene chloride (PVDC), and the like. The support is not particularly limited as long as it has mechanical strength and dimensional stability. A biaxially stretched film is particularly preferable. The thickness of the base film is preferably in the range of 10 to 50 μm and more preferably in the range of 10 to 30 μm in consideration of workability.

  As the sealant layer 52, low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EAA), ethylene- A film made of a polyolefin-based resin such as vinyl acetate copolymer (EVA), ionomer, or polypropylene can be used. These resins can be used by forming a film with an extruder. It can be used in a single layer or multiple layers using the above resin. The film thickness is preferably in the range of 10 to 100 μm, more preferably in the range of 15 to 70 μm. By using a film made of these resins, it can be bonded to the bottom sheet.

  As the adhesive layer 53, an adhesive for dry lamination can be used. For example, a two-component curable urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, and the like can be used. . As a bonding method, a dry lamination method is possible.

  Further, if it is necessary to improve various physical properties of the laminated sheet 50, the intermediate layer 54 can be provided on the laminated sheet. For example, it can be laminated in the case of improving the rigidity, drop strength, piercing strength, etc. of the laminated sheet. As the layer configuration, as shown in FIG. 6B, the laminated sheet 50 has a layer configuration of base film layer 51 / adhesive layer 53 / intermediate layer 54 / adhesive layer 53 / sealant layer 52.

  As the intermediate layer 54, for example, a stretched polyamide resin film, a polyethylene terephthalate film, or the like can be used to improve the drop strength or the piercing strength, and aluminum can be used to improve the oxygen gas barrier or the water vapor barrier. A foil, an aluminum-deposited polyethylene terephthalate film, an inorganic oxide-deposited polyethylene terephthalate film, or the like can be used. In addition, the intermediate layer can be laminated by a dry laminating method through the adhesive layer 53.

  As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide can be used. . Of these, silicon oxide, aluminum oxide, magnesium oxide and the like are preferable from the viewpoint of productivity and price.

Further, the base film layer 51 can be appropriately provided with a print layer as necessary. The printed layer is made of a solvent, ink made by adding urethane, acrylic, nitrocellulose, rubber and other binder resins, and various pigments, extenders, plasticizers, desiccants, stabilizers, etc. Layer. Characters, designs, etc. can be formed by this print layer. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexographic printing, silk screen printing, and ink jet printing can be used. Moreover, the adhesiveness of a printing layer can be improved by performing the corona treatment or the ozone treatment as the pre-treatment on the surface of the base film layer in advance. Moreover, the printing to the stretched polyethylene film of a bottom part sheet | seat can be performed similarly. The printing method can be determined as appropriate.

  The opening maintaining member 30 can be made by an injection molding method using a resin such as polyethylene or polypropylene. At the time of bag making, the opening maintaining member is partially bonded to the inner surface of the laminated sheet forming the spout portion, that is, the sealant surface with an adhesive or heat-sealed, and then the bag is formed, and the bag is formed in the spout portion. Can be inserted.

  The packaging bag with an opening maintaining member of the present invention is a packaging bag having a spout portion that tapers in the outer direction at the upper corner, and the opening maintaining member is inserted into the spout portion. The opening maintaining member is inserted and attached substantially in parallel with the upper seal portion and the lower seal portion, and the inner side of the upper seal portion with respect to the perpendicular to the direction in which the upper seal portion and the lower seal portion are pressed inward from the outside. And when the inclination angle of the inner side of the lower seal portion is in the range of ± 0 ° to ± 8 °, the opening maintaining member can be easily assembled by the force pressed by the finger. Further, by making the distance between the outer side of the opening maintaining member, the inner side of the upper seal part, and the inner side of the lower seal part 0.7 mm or more, respectively, the opening maintaining member can be more easily assembled. Can do.

  In addition, the inner side of the upper seal part and the inner side of the lower seal part are formed by making the shape of the inner side of the upper seal part and the inner side of the lower seal part into a wavy line or an irregular shape with a sharp convex part. Can be easily bent, the pressing force can be concentrated on the opening maintaining member, and the opening maintaining member can be easily assembled.

  Moreover, by providing the easy cut line 7 in the spout portion, the tip seal portion can be cut, and the spout portion can be opened to form a spout hole. One end of the easy-cut line 7 can be provided with a V-shaped or U-shaped notch or cut line to improve unsealing performance. The easy-cut line is preferably a half-cut line provided continuously on the front and back films. For the half-cut line, a method of forming with a blade and a method of forming by laser processing are generally used, but the method by laser processing is preferable because a uniform and stable cut can be formed. As the type of laser, a carbon dioxide laser is more preferable.

  Hereinafter, specific examples of the present invention will be described.

  A polyethylene terephthalate film (PET) 12 μm was bonded as a base film layer, and a stretched polyamide film (ONy) 15 μm was bonded as an intermediate layer via a two-component curable urethane adhesive by a dry lamination method.

  Next, as a sealant layer, a linear low density polyethylene film (LLDPE) 70 μm was bonded to the surface of the stretched polyamide film by a dry laminating method via a two-component curable urethane adhesive to prepare a laminated sheet.

  Next, in order to form a self-supporting packaging bag, the laminated sheet was slit into a predetermined width of the trunk sheet and the bottom sheet.

  Next, the bottom sheet was sandwiched between the lower portions of the two front and back body sheets, and the bottom and the left and right sides were sealed to form a bottom seal part and a left and right side seal part. The top part was sealed to form a top seal part. The size of the self-supporting packaging bag was 170 mm wide × 240 mm long. At this time, a spout part as shown in FIG. 2 was formed in the upper left corner, and an opening maintaining member (shown in FIG. 3) was inserted into the spout part. The opening maintaining member was made by injection molding using polyethylene resin.

  A packaging bag was created in which the inclination angle A between the perpendicular line shown in FIG. 2 and the inner side of the upper seal part and the inner side of the lower seal part was ± 0 °. Moreover, the distance L between the outer side of the side plate of the opening maintaining member, the inner side of the upper seal part, and the inner side of the lower seal part was set to 1.0 mm.

  A packaging bag was prepared in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 2 °.

  A packaging bag was prepared in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 4 °.

  A packaging bag was produced in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 6 °.

  A packaging bag was produced in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 8 °.

  A packaging bag was made in the same manner as in Example 1 except that the distance L in Example 1 was 0.7 mm.

  A packaging bag was produced in the same manner as in Example 1 except that the distance L in Example 1 was 1.5 mm.

  A packaging bag was produced in the same manner as in Example 1 except that the distance L in Example 1 was set to 2.0 mm.

  A packaging bag was made in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 8 ° and the distance L was 0.7 mm.

  A packaging bag was made in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 8 ° and the distance L was 2.0 mm.

  Below, the comparative example of this invention is demonstrated.

<Comparative Example 1>
A packaging bag was produced in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 10 °.

<Comparative Example 2>
A packaging bag was produced in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 12 °.

<Comparative Example 3>
A packaging bag was produced in the same manner as in Example 1 except that the distance L in Example 1 was set to 0.0 mm.

<Comparative Example 4>
A packaging bag was produced in the same manner as in Example 1 except that the distance L in Example 1 was set to 0.3 mm.

<Comparative Example 5>
A packaging bag was produced in the same manner as in Example 1 except that the distance L in Example 1 was changed to 0.5 mm.

<Comparative Example 6>
A packaging bag was produced in the same manner as in Example 1 except that the inclination angle A of Example 1 was ± 8 ° and the distance L was 0.5 mm.

<Evaluation method>
The upper seal part and the lower seal part of the spout part of the packaging bags of Examples 1 to 10 and Comparative Examples 1 to 6 were pressed from the outside inward with the fingers, and the ease of assembly of the opening maintaining member was evaluated. . Ten bags were evaluated each. Evaluation was performed by sensuality, with ○ being easy to assemble and × being difficult to assemble.

  The evaluation results are shown in Table 1.

When the inclination angle A of Examples 1 to 5 was in the range of 0 to ± 8 °, the assembly of the opening maintaining member was easy. However, when the inclination angle A of Comparative Examples 1 and 2 was ± 10 ° and ± 12 °, it was difficult to assemble.

  Further, in Examples 6 to 8, assembly was easy when the inclination angle A was ± 0 ° and the distance L was 0.7 mm or more. However, in Comparative Examples 3 to 5, it was difficult to assemble when the inclination angle was ± 0 ° and the distance was in the range of 0 to 0.5 mm.

  Further, in Example 9, it was easy to assemble one having an inclination angle A of ± 8 ° and a distance L of 0.7 mm. However, in Comparative Example 6, it was difficult to assemble a lens having an inclination angle A of ± 8 ° and a distance L of 0.5 mm.

  The inclination angle between the perpendicular and the inner side of the upper seal part and the inner side of the lower seal part is in the range of ± 0 ° to ± 8 °, and the outer side of the side plate, the inner side of the upper seal part, and If the distance from the inner side of the lower seal part is 0.7 mm or more, the force of pressing with the finger from the outer side to the inner side of the upper seal part and the lower seal part will not escape sideways and it will slip. Since it was difficult, it turned out that an opening maintenance member can be assembled easily.

DESCRIPTION OF SYMBOLS 1 ... Packaging bag with an opening maintaining member 2 ... Body sheet 3 ... Bottom sheet 4 ... Bottom seal part 5 ... Side seal part 6 ... Spout part 7 ... Easy cut Line 8 ... tip seal portion 9 ... upper seal portion 10 ··· inner side 11 of upper seal portion ··· lower seal portion 12 · · inner side 13 of lower seal portion ··· opening 14 ··· seal Part 20 ·· Vertical line 30 · · Opening maintenance member 31 · · Fixing plate 32 · · Side plate 33 · · Outer side 34 · · Hinge 35 · · Notch 36 · · Engaging projection 37 · · Cross section 38 · -Claw 39--Adhesion 40--Pouring hole 50--Laminate sheet 51--Base film layer 52--Sealant layer 53--Adhesive layer 54--Intermediate layer A-Angle L-・ Distance C ・ ・ ・ Pressing direction

Claims (1)

In the packaging bag having the spout portion tapered in the outer direction at the upper corner,
In the spout portion, a rectangular side plate is connected to both sides of a rectangular fixed plate via hinges, and flat plate opening maintaining members for assembling the side plates via the two hinges are inserted. A packaging bag with an opening maintaining member,
The spout portion is formed of a tip seal portion, an upper seal portion, and a lower seal portion,
The opening maintaining member is inserted so that the side plate is substantially parallel to the upper seal portion and the lower seal portion;
Inclination angles of the inner side of the upper seal part and the inner side of the lower seal part with respect to a perpendicular to the direction pressing inward from the outside of the upper seal part and the lower seal part are ± 0 ° to ± 8 ° range,
The packaging bag with an opening maintaining member, wherein the distance between the outer side of the side plate, the inner side of the upper seal part, and the inner side of the lower seal part is 0.7 mm or more, respectively.