JPH111249A - Packaging bag - Google Patents

Abstract

(57) [Summary] [Problem] To provide a packaging bag which has good pourability that can be applied not only to liquids but also powders and granules, and is suitable for refilling at a low production cost. A packaging bag is formed by sealing the peripheral edges of two front and back synthetic resin films, and an unsealed portion forms a spout passage, wherein at least one recess forming portion is formed in the spout passage. I let it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag provided with a spout for facilitating pouring of contents, and more particularly to a liquid bag having a high viscosity such as liquids, powders, granules and the like. The present invention relates to a packaging bag for storing articles that can be poured out from an outlet and suitable for refilling.

[0002]

2. Description of the Related Art Conventionally, pump-type containers that discharge a suitable amount of liquid such as shampoo and dishwashing detergent with a pump have been frequently used. And in recent years, even if the contents of the pump-type container are exhausted due to resource saving, the contents filled in the packing bag dedicated for refilling are refilled into empty pump-type containers without discarding the container, It has been practiced to reuse the pump-type container many times.

[0003] As a packaging bag for storing the liquid for refilling, for example, as shown in FIG. A seal 51 is provided on the periphery of a packaging bag of the type that is cut and opened, or on the front and back of two synthetic resin films as shown in FIG.
A packaging bag or the like is used in which a hollow cylindrical plug body 56 made of synthetic resin is embedded between two synthetic resin films to provide a protruding pouring portion.

In the former packaging bag, since the packaging bag is swelled by the liquid at the time of pouring, a force in a direction in which the spout passage is pulled and closed acts, so that the inner surfaces of the spout passages come into close contact with each other and the spout. Since the passage tends to be easily blocked, it is difficult to discharge the liquid, and if the liquid is not pressed and squeezed continuously, the liquid cannot be efficiently discharged.If the remaining amount is small, it is difficult to discharge the liquid from the packaging bag. There is a problem in the pouring function, such as a large amount of residual liquid adhering to the packaging bag and waste of contents. Also,
In the latter packaging bag, although the above-described pouring function is improved, a molded product made of synthetic resin is attached to a soft synthetic resin film, and the diameter of the plug body may be reduced depending on the properties of the contents. It must be adjusted to an appropriate one, and problems such as labor, cost, and shape restrictions remain.

Further, Japanese Patent Application Laid-Open No. Hei 7-2260 discloses FIG.
(A) As shown in (b), one or more reinforcing mechanisms 104 and 113 are provided in the portion of the spout 103, and the reinforcing mechanisms 104 and 113 are formed by deforming the film 107. A bag 102 having a spout with a reinforcing mechanism, characterized by substantially one or more linear deformations 105, 106, is disclosed.

In this bag, a passage is formed only in the formed reinforcing mechanism, and the contents flow out, but the peripheral portion of the reinforcing mechanism is still in close contact. Further, since the molding is linear deformation, the line width cannot be widened, and deep processing cannot be performed, so that a problem remains that a sufficient passage cannot be formed.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in order to eliminate the above-mentioned problems relating to a refillable packaging bag, and is intended for use in liquids (body soaps, shampoos, soft finishes, kitchen detergents, bleaching agents). , Photographic film developer,
The purpose of the present invention is to provide a refillable packaging bag which can be applied to powders (soap, powdered bleach, etc.), granules, etc., has good pouring function, and is inexpensive to manufacture. I do.

[0008]

Means for Solving the Problems A first invention of the present invention is:
A packaging bag in which the peripheral edges of two front and back synthetic resin films are sealed and an unsealed portion forms a spout passage, wherein the spout passage has one or more recessed portions formed therein. is there.

A second invention is a packaging bag in which one or more recessed portions are formed at a scheduled outlet at a corner of a packaging bag formed by sealing the peripheral edges of two front and back synthetic resin films. It is.

[0010] Furthermore, a third invention is the packaging bag according to the first and second inventions, wherein the recess-formed portion is formed by making the synthetic resin film convex toward the inside of the packaging bag. .

Further, a fourth invention is the packaging bag according to the first, second and third inventions, wherein the recess forming portion is formed on both sides of the packaging bag.

A fifth aspect of the present invention is the packaging bag according to the first, second, and third aspects, wherein the hollow forming portion is formed on one of the front side and the back side of the packaging bag. is there.

Still further, a sixth invention is directed to the first, second, and third aspects.
In the third and fourth inventions, the hollow forming portions formed on both sides of the packaging bag are packaging bags arranged so as not to overlap with each other.

[0014] Furthermore, a seventh invention is directed to the first, second, and third aspects.
In the third, fourth, fifth, and sixth inventions, the dent forming part is a packaging bag formed in series on a center line of a spout passage.

Further, the eighth invention is characterized in that the first, second,
In the third, fourth, fifth and sixth aspects of the present invention, the recessed portion is a packaging bag in which a plurality of rows are formed in series on a radiation directed toward the center of the spout.

Further, a ninth invention is directed to the first, second, and third aspects.
In the third, fourth, fifth, and sixth inventions, the present invention is a packaging bag in which the recessed portions are formed at random.

Further, a tenth invention is a packaging bag according to any one of the first to ninth inventions, wherein the shape of the packaging bag is a standing pouch.

As described above, according to the present invention, since at least one recess-forming portion is formed in the spout passage or the expected spout portion so as to be convex toward the inside of the bag, Can be discharged smoothly and stably from the spout passage or the expected spout portion.

[0019]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A packaging bag according to the present invention will be described with reference to FIG. FIG. 1 is an explanatory diagram showing a state in which contents such as a liquid for refilling are filled and sealed.

Reference numeral 11 denotes a sealing portion which seals the peripheral edges of the two front and back synthetic resin films. Numeral 12 denotes a hollow formed portion provided in the spout passage 13.

The hollow forming portion 12 is formed by forming a synthetic resin film into a convex shape toward the inside of the packaging bag, and is preferably in a shape of a circle, an ellipse, an oval, or the like. It may be formed on both the front and back sides of the packaging bag, or may be formed on either the front side or the back side. The recessed portions 12 formed on the front and back sides must be arranged so as not to overlap each other when the spout passage is pushed.

Further, when a plurality of recess forming portions 12 are provided in series, they are provided on the center line of the spout passage 13, and when a plurality of recess forming portions 12 are provided, they are provided at the center of the spout 14. Although it is preferable to provide on the radiation which is directed from the viewpoint of efficiently pouring out the contents, the recessed portion may be provided at random.

More specifically, the arrangement of the recess forming portions 12 is as follows: (1) One is provided in the spout passage (see FIG. 2 (a)); (See FIG. 2B), (3) Arrange a plurality of outlet passages in the same direction (see FIG. 2C), and (4) Arrange a plurality of outlet passages alternately in the same direction (see FIG. 2C). FIG.
(See (d)), this method is an effective method when providing a hollow forming part on the front and back of a packaging bag. This is because the increase in the thickness of the spout passage due to the recessed portion can be minimized. (5) A plurality of rows may be arranged in the same direction with respect to the spout passage (see FIG. 2E). The spout provided in the packaging bag is provided at the end of the packaging bag in the example shown in the figure, but may be provided at the center of the packaging bag. Further, the recess forming portion may be provided on only one side of the bag or may be provided on both sides of the bag.

When the hollow forming part 12 is circular, the size depends on the size of the bag, the width of the spout passage, the type of the contents (liquid or granular, and if it is a liquid, its viscosity etc.). The diameter is about 0.5 mm to about the width of the spout passage, and the depth is about 0.3 to 10 mm, which is preferably used, and more preferably about 3 mm in diameter.
A depth of about 0.5 mm is good.

The structure of the spout passage 13 may be various structures other than the structure shown in FIG.
As shown in (e), any structure may be used as long as the unsealed portion forms a spout passage.

The synthetic resin film used for the packaging bag is based on a conventionally used material, for example, various films such as a biaxially oriented polypropylene film (OPP), a biaxially oriented polyester film (OPET), and a biaxially oriented polyamide film. Material film, and these base films,
A composite film or sheet in which a polyolefin-based heat-adhesive resin such as linear low-density polyethylene, low-density polyethylene, polypropylene, and ethylene-vinyl acetate copolymer is laminated as a sealant layer can be used. In this case, in order to enhance the gas barrier properties of the contents to be filled,
As the base film, a so-called vapor-deposited film provided with a vapor-deposited layer of an inorganic compound such as silicon, aluminum, or titanium may be used, a plurality of the above films may be laminated, and an aluminum foil (Al) may be used. Further, a printing layer is provided on the surface of the substrate film which is in contact with the sealant layer, if necessary.

As a more specific configuration example of the synthetic resin film used for the packaging bag, the following configuration can be considered. (1) OPET / printing layer / Al / biaxially stretched nylon film (ONy) / linear low density polyethylene film (L
(LDPE) (2) ONy / printed layer / OPP / Al / LLDPE (3) Inorganic compound vapor deposited OPET / printed layer / ONy / LL
DPE (4) ONy / printing layer / LLDPE

The method for forming the dents forming the dent forming part 12 is performed as follows. That is, a method is generally used in which a male mold and a female mold are used to press-form a synthetic resin film at a position where a depression is formed in a synthetic resin film before bag making. When aluminum foil is included in the layer structure of the synthetic resin film,
The depressions can be formed by a so-called cold foam method without heating the mold, and in the case of a layer structure not including the aluminum foil, heat is applied to the mold (preferably, the glass transition point of the base film). It is preferable to form a depression at the above temperature and at a temperature not higher than the melting temperature of the sealant layer.

In order to transfer the contents from the packaging bag of the present invention to another container, the portion to be opened of the packaging bag is torn by hand using the opening notch 15 provided in the sealing portion of the packaging bag.
Alternatively, the opening is exposed by cutting the portion to be opened along the cut line 14 using an instrument such as scissors.
The cutting line 14 may overlap with the recess forming part 12,
It does not matter if they do not overlap. If the packaging bag is inclined by squeezing the packaging bag with the spout directed toward another container, the spout passage 13
Since the recess forming portion 12 is formed, the inner surfaces of the spout passages do not adhere to each other, the contents enter the spout passage through the recess forming portion, and the spout passage is not blocked and stable. The contents can be transferred from the spout to another container.

FIG. 4 is a front view of another embodiment showing a state in which articles such as liquid for refilling are filled and sealed. Reference numeral 21 denotes a seal portion which seals the peripheral edges of two front and back synthetic resin films. Reference numeral 22 denotes a hollow formed portion provided in the opening portion 23 at the corner of the bag. The opening scheduled portion 23 is provided with a notch 25 for opening at a peripheral seal portion, or a print (not shown) in which a cut portion is clearly indicated, or the like, so that it can be clearly identified in advance.

This embodiment is a packaging bag provided with an opening portion 23 or a recessed portion 22 in the vicinity thereof.
This is a packaging bag based on the same technical concept as FIG. 1 except that the spout passage is not formed. Therefore, detailed description is omitted. The shape of the packaging bag is a standing pouch.

[0032]

EXAMPLES Examples of the present invention will be described below more specifically. <Example 1> A 7 µm-thick Al layer was dry-laminated on a surface provided with a 12 µm-thick OPET print layer provided with a print layer in necessary portions via a two-liquid reaction type polyester adhesive. Separately, ONy of thickness 15μm and thickness 100μm
LLDPE was dry-laminated via a two-component reaction type polyester adhesive. Al of two composite films
Surface and the ONy surface are opposed to each other and dry-laminated via a two-component reactive type polyester adhesive. [Outer surface] OPET
(12 μm) (print layer) / Al (7 μm) / ONy (1
5 μm) / LLDPE (100 μm) [inner surface] to prepare a synthetic resin film.

Next, the two windings of the synthetic resin film thus produced are set on a vertical filling and sealing machine such that the LLDPE surfaces face each other, and the contents are passed through the steps shown in FIG. The packaging bag of the present invention shown in FIG. 1 in which the liquid detergent was filled and sealed was produced. By using a vertical filling and sealing machine, a packaging bag filled with contents can be continuously produced.

By replacing the forming roll for forming the recessed portion and the second seal for sealing the rest of the peripheral portion, a packaging bag having an arbitrary recessed portion and a spout passage can be manufactured.

Example 2 Using the same synthetic resin film as in Example 1, a packaging bag in the form of a standing pouch as shown in FIG. (The contents are liquid detergent.)

The two types of packaging bags prepared as described above were exposed with the opening notch as a clue to expose the spout,
The liquid detergent as the contents was discharged into the transfer container by squeezing the packaging bag. Since the hollow portion was formed in the passage through which the contents were discharged, the inner surface of the passage was stably discharged to the transfer container without the inner surfaces of the passages being in close contact with each other.

[0037]

As described above, according to the present invention, at least one recessed portion is formed in the spout passage or the expected spout portion, so that it is stable regardless of the type and viscosity of the contents. It can now be discharged smoothly. Since a synthetic resin plug or the like is not required, a low-cost, easy-to-handle packaging bag can be manufactured. Since the recessed portion may be formed on the back surface of the packaging bag, the commercial value such as the appearance is not impaired.

[Brief description of the drawings]

1A and 1B show an embodiment of the packaging bag of the present invention, wherein FIG. 1A is a front view and FIG.

FIGS. 2 (a) to (e) are explanatory views showing an example of the arrangement of a concave forming portion in the present invention.

FIGS. 3A to 3E are explanatory views showing an example of a structure of a spout passage of a packaging bag according to the present invention.

FIG. 4 is an explanatory view showing another embodiment of the packaging bag of the present invention.

FIG. 5 is a process explanatory view showing an example of a manufacturing process of the packaging bag of the present invention.

FIG. 6 is an explanatory view showing a conventional example of a packaging bag.

FIG. 7 is an explanatory view showing another conventional example of a packaging bag.

FIG. 8 is an explanatory view showing still another conventional example of a packaging bag.
(A) is a side view, (b) is a cross-sectional view when cut along AA.

[Explanation of symbols]

 10 {Packaging bag 11, 21, 51} Sealing part 12, 22} Recess forming part 13, 53 {Injection passage 14} Cut line 15, 25} Opening notch 23} Scheduled opening part 56 {Mouth plug 102} Bag 103} Spout 104, 113 {Reinforcement mechanism 105, 106} Linear deformation 107} Film

Claims (10)

[Claims] 1. A packaging bag in which the peripheral edges of two front and back synthetic resin films are sealed and an unsealed portion forms a spout passage, wherein at least one recess forming portion is formed in the spout passage. A packaging bag characterized by having been made. 2. A packaging bag, wherein at least one recessed portion is formed at a corner to be opened in a packaging bag formed by sealing the peripheral edges of two front and back synthetic resin films. 3. The packaging bag according to claim 1, wherein the recessed portion is formed by making the synthetic resin film convex toward the inside of the packaging bag. 4. The dent forming part is formed on both front and back sides of the packaging bag.
The packaging bag described. 5. The packaging bag according to claim 1, wherein the recess forming portion is formed on one of a front side and a back side of the packaging bag. 6. The packaging bag according to claim 1, wherein the hollow forming portions formed on both sides of the packaging bag are arranged so as not to overlap with each other. 7. The packaging bag according to claim 1, wherein said recess forming portion is formed in series on a center line of a spout passage. 8. The method according to claim 1, wherein the plurality of recessed portions are formed in series in a line toward the center of the spout. Packaging bag. 9. A method according to claim 1, wherein said recessed portion is formed in a spout passage at random.
The packaging bag according to 3, 4, 5 or 6. 10. A packaging bag according to claim 1, wherein the shape of the packaging bag is a standing pouch.