JPH1111498A - Package bag with spout function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a spout easily, prevent a bend in the spout, and take out contents easily, by providing the spout with an opening auxiliary mechanism and bend prevention mechanism obtained by an embossing process, in a package bag having the spout in a package-bag upper part. SOLUTION: A package bag 1 used for cosmetic or detergent has in a corner of its upper part a nozzle-like spout 2 provided with an opening auxiliary mechanism 3 and bend prevention mechanism 4 obtained by an embossing process. The opening auxiliary mechanism 3 is almost rectangular, circular, or almost triangular in shape when seen from above, and its cross-section is projecting outward or inward in shape, and, therefore, the spout 2 is prevented from being closed when spouting its contents, and even if the contents are highly viscous, they are easily spouted by securing the large cross-sectional area of the spout 2. Also, providing the bend prevention mechanism 4 next to or in contact with the opening auxiliary mechanism 3 prevents, when the contents are spouted, the spout 2 from bending with the result that a passage is shut off.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packaging bag used for refilling seasonings, retort foods, cosmetics, detergents, etc., which is low in production cost and easy to take out contents.

[0002]

2. Description of the Related Art Packaging bags used for refilling seasonings, retort foods, cosmetics, detergents, etc. are those which can easily take out contents and can take out contents while maintaining a stable flow to the end. Is required. Conventionally, a plastic resin packaging bag having a hollow cylindrical nozzle made of plastic or the like attached to an outlet of the plastic resin packaging bag or a soft resin film packaging bag has been proposed. A hollow (semi-) cylindrical outlet pipe has been proposed. (See, for example,
No. 2538) In addition, a packing bag provided with a bulging portion which bulges outward at a spout of the packaging bag (Japanese Patent Laid-Open No. 6-127560), and a refillable packing bag provided with a reinforcing mechanism at the spout of the packaging bag are also available. Proposed. (JP-A-7-2260)

[0003]

However, a hollow cylindrical nozzle can be attached to a soft packaging bag, or a hollow (half) nozzle can be used.
Forming a cylindrical pouring line requires a special process, which increases costs.In addition, since the obtained packaging bag has a hollow cylindrical nozzle and a pouring line, it is stacked and transported. There is a problem that the storage is bulky and requires extra space. In addition, in the case of simply providing a bulging portion at the spout of the packaging bag, the spout is easily bent and the flow path of the contents becomes unstable at the time of pouring, whereas merely providing the reinforcing mechanism at the spout of the packaging bag is not sufficient. However, there is a problem that the opening property of the spout becomes poor at the time of opening.

Accordingly, an object of the present invention is to provide a manufacturing method which does not require a special process and to easily form a spout when opening a packaging bag to take out contents. It is an object of the present invention to provide a packaging bag that can prevent the outlet from being bent and can easily take out the contents while maintaining a stable flow to the end, and that is not bulky during transportation or storage.

[0005]

According to the present invention, in a packaging bag formed of a plastic film and provided with a spout above the packaging bag, an opening assisting mechanism by embossing and a bend preventing mechanism are provided in the spout. An object of the present invention is to solve the above-mentioned problems of the prior art and to obtain a target refillable packaging bag.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The plastic film used for the packaging bag of the present invention is not particularly limited, and any plastic film usually used for a packaging bag can be used. Examples of a plastic material suitable for constituting a plastic film include crystalline polypropylene, crystalline propylene-ethylene copolymer, crystalline polybutene-1, crystalline poly-4-methylpentene-1, low-, medium-, Alternatively, high-density polyethylene, ethylene-vinyl acetate copolymer (EV
A), ethylene-ethyl acrylate copolymer (EE
A), ion-crosslinked olefin copolymer (ionomer)
Polyolefins such as polystyrene and styrene-butadiene copolymer; aromatic vinyl copolymers such as polyvinyl chloride and vinylidene chloride resin; acrylonitrile-styrene copolymer; acrylonitrile-styrene-butadiene copolymer Nitrile polymers such as polymers; polyamides such as nylon 6, nylon 66, para- or meta-xylylene adipamide; polyesters such as polyethylene terephthalate and polytetramethylene terephthalate; various polycarbonates; polyacetals such as polyoxymethylene Thermoplastic resin. Films made of these plastic materials are used as unstretched or uniaxially or biaxially stretched films.

[0007] The plastic film used in the packaging bag of the present invention can be constituted by a single layer of these plastic films or by laminating two or more of them, and one or two of these plastic films can be used. A metal foil such as aluminum or the like, paper, cellophane, or the like may be bonded to the above. Preferred plastic films include, for example, a stretched nylon film as an outer layer, a low-density polyethylene, a two-layer structure having a polyolefin film such as polypropylene as an inner layer, a stretched polyester film as an outer layer, and a two-layer structure having a polyolefin film as an inner layer. And a three-layer structure in which a metal foil such as aluminum is laminated between outer films. When manufacturing these laminated films, an anchoring agent may be interposed between the layers as necessary.

Whether the plastic film is made into a single layer or what kind of layer structure may be selected according to the properties of the contents to be filled in the packaging bag. For products that require low cost, use a laminated film with a two-layer structure, and for retort pouches that fill contents that require preservation, such as seasonings and retort foods, use aluminum foil. What is necessary is just to use the laminated film of more than layers.

Hereinafter, the features of the packaging bag of the present invention will be further described with reference to the drawings. FIG. 1 is an overall view showing an example of the packaging bag of the present invention, and FIGS. 2 to 4 are partially enlarged views of nozzle-like spouts showing other examples of the packaging bag of the present invention. FIG. 5 is a diagram showing an example of a cross-sectional shape of an opening assisting mechanism provided at a spout in the packaging bag of the present invention. FIG. 6 is a sectional view of a bending preventing mechanism provided adjacent to or adjacent to the opening assisting mechanism. It is a figure showing an example. In these figures, reference numeral 1 denotes a packaging bag, reference numeral 2 denotes a spout, reference numeral 3 denotes an opening assisting mechanism, reference numeral 4 denotes a bend prevention mechanism, reference numeral 5 denotes an easy-opening portion, and reference numeral 6 denotes a heat seal portion.

In the packaging bag of the present invention, a nozzle-shaped spout 2 is provided above the bag 1, and the spout 2 is preferably provided at a corner portion above the bag as shown in FIG.
The size and shape of the nozzle-shaped spout may be appropriately set according to the type of the content to be filled and the size of the mouth of the container.

The present invention is characterized in that the opening 2 is provided with an opening assisting mechanism 3 by embossing and a bend preventing mechanism 4. Opening assist mechanism 3 at spout 2 of packaging bag
Is provided, it is possible to prevent the spout from being closed when the packaging bag is spouted, and since the cross-sectional area of the spout becomes large, it becomes easy to pour even high-viscosity contents. Further, by providing the bend preventing mechanism 4 adjacent to or adjacent to the opening assisting mechanism 3, it is possible to prevent the spout 2 from being bent and blocking the flow path when the contents are poured out, and a stable pouring direction. And the amount of pouring can be obtained.

There are no particular restrictions on the shape, dimensions, and cross-sectional shape of the opening assist mechanism 3 as viewed from the top, and examples of the shape as viewed from the top include a substantially rectangular shape as shown in FIGS. 1 and 2, a circular shape as shown in FIG. It can be a substantially triangular shape as shown in FIG.
It is preferable that the opening assist mechanism 3 is provided to extend to the inside of the bag as shown in FIGS. 7 and 8 described later, because the contents can be more easily poured out. The cross-sectional shape of the opening assist mechanism 3 is not particularly limited, and may be, for example, an outwardly convex shape as shown in FIGS. As shown in FIG. 5C, it is preferable to provide an outwardly convex fold at the center of the opening assist mechanism 3 because the opening property and the restoring property of the bulge are particularly good. The opening assist mechanism 3 can be formed on both sides of a plastic film (packaging material) forming a packaging bag as shown in FIG. 5, or can be formed on only one side of the packaging material.

In the packaging bag of the present invention, a buckling prevention mechanism 4 is provided adjacent to or adjacent to the opening assisting mechanism 3. The number of the buckling prevention mechanisms, the shape, size,
There is no particular limitation on the cross-sectional shape and the like, and one or two or more bending preventing mechanisms 4 can be provided. Further, examples of the shape viewed from the upper surface include a rod-like shape as shown in FIGS. 1, 2 and 4, and a corrugated shape as shown in FIG. These bend preventing mechanisms 4 are not limited to one kind, and may be configured to be provided by combining two or more kinds of bend preventing mechanisms 4 having different shapes as shown in FIG. As the cross-sectional shape of the bending preventing mechanism 4, for example, those shown in F, G, and H in FIG.

FIGS. 7, 8 and 9 show another embodiment of the present invention, in which a bending preventing mechanism 4 is provided in the opening assisting mechanism 3. FIG. In the embodiment shown in FIG. 7, the opening assisting mechanism 3 has an arrowhead shape, and a bending preventing mechanism 4 is provided at the center and below both sides thereof. Also,
In the embodiment of FIG. 8, the inclination angle of the triangular opening assist mechanism 3 is set so that a vertical line drawn from the apex angle to the base is 40 to 50 degrees with respect to the horizontal direction, and along the two sides on both sides thereof. And a bending prevention mechanism 4 is provided substantially in parallel. As shown in FIG. 9, a narrow bend prevention mechanism 4 is provided in a wide opening assist mechanism 3. In these embodiments, the opening assisting mechanism 3 has an arrowhead shape or a triangular shape. However, an appropriate shape such as a rhombus or an ellipse can be adopted. The shape, cross-sectional shape, and provided angle can be appropriately selected and adopted. Furthermore, as shown in FIG. 10, it is also possible to crush the bending prevention mechanism 4 or heat seal the inner layer of the bending prevention mechanism 4 to increase the strength.

The packaging bag of the present invention may be provided with an opening assisting mechanism or a bend preventing mechanism by heating a plastic film constituting the packaging bag prior to bag making, pressing a jig having a desired shape, and embossing. A method of deep drawing using a vacuum or compressed air and then cooling can be used, but embossing is preferred from the viewpoint of simplicity of operation. In this case, in addition to the method of heating the plastic film, a jig having a desired shape can be heated by various methods such as high-frequency heating and heater heating. A plastic film provided with an opening assisting mechanism and a bend preventing mechanism is made into a bag by a bag making machine, and after filling the contents, the filling port is heat-sealed to be sealed.

In the spout 2 of the packaging bag of the present invention, an easy-opening section 5 can be provided to facilitate opening of the packaging bag. Examples of such an easy-opening portion include an I-shaped or V-shaped notch formed at the end of the bag, a perforation or a score crossing the spout, and other thinned and weakened portions or a combination thereof. Examples of a method for forming such an easy-opening portion include (1) laser processing using a focus beam or a carbide beam, (2) mechanical processing using a blade, a grindstone, or the like, and (3) thermal processing using a heat bar or the like. When forming an easy-opening portion such as a perforation or a score that crosses the spout, if the easy-opening portion that completely penetrates the plastic film is formed, the type of contents filled in the packaging bag In some cases, the content leaks or the drop strength after filling the content decreases, which is not preferable. In such a case, for example, such a problem can be prevented by forming the packaging bag with a laminated film and performing easy opening processing only on the outer layer film constituting the laminated film. As the easy-opening section that traverses the spout, the processing state is unstable, the generation of fumes,
In order to avoid problems such as misalignment of the processing position on the front and back when forming a packaging bag, processing debris by machining, generation of powder of packaging material, and instability of the processing state due to adhesion of resin by heat processing of the heat bar, It is preferably formed by laser processing using a carbide beam. The easy-opening portion is laser-processed with a callide beam to the outer surface of the film and / or
Alternatively, it is preferable to form a plurality of layers on the inner surface, or on the outer layer film and / or the inner layer film of the laminated film.

Next, an example of forming an easy-opening portion by laser processing using a carbide beam will be described with reference to the drawings. 11 is a diagram showing a cross-sectional shape of the easy-opening portion formed by laser processing using a carbide beam, which crosses the opening direction, FIG. 12 is a diagram showing a cross-sectional shape along line AA in FIG. 11, and FIG. 13 is an arrangement of the easy-opening portion. FIG. 14 is a schematic view showing the state, and FIG. 14 is a cross-sectional view for explaining the relationship between the valleys and the peaks that constitute the weakened layer of the easy-opening portion. For example, as shown in FIG. 11, the easy-opening processing portion 5 is a weakened layer composed of a plurality of pairs of valleys 7 and peaks 8 in a state of being adjacent to each other or at a small interval in a direction crossing the opening direction. And the depth of the valley 7 and the height of the peak 8 change,
As shown in FIG. 12, the valleys are formed so that the depth of the valleys and the heights of the hills change gradually along the opening direction of the arrow B.

According to the above-described structure, in the easy-opening processing portion 5 formed in a plurality, as shown in FIG. 13, a relatively deep portion 71 indicated by a solid line adjacent or at a small interval along the opening direction. And a relatively shallow portion 72 indicated by a dotted line is formed, but the relatively deep portions 71 of the easily opened portions adjacent to each other are adjacent or continuous at a small interval.
It is formed as being close to or overlapping, and only the relatively shallow portion 72 is not formed to overlap. Therefore, it is possible to prevent poor opening due to the shallow depth of the easily-opened portion, which is generated when the easily-opened portion 5 is formed by one piece.

As shown in FIG. 14, when the average thickness of the film forming the weakened layer is t ₀ , the thickness of the bottom of the valley 7 is t ₁ , and the thickness of the top of the peak 8 is t _2. , T ₁ / t ₀ are 0.9 to 0.1, particularly 0.8 to 0.5, and t ₂
/ T ₀ is 1.05 to 2.0, especially 1.1 to 1.
8 is preferable. When the value of t ₁ / t ₀ is larger than the above range, tear initiation and tear guiding properties are insufficient. On the other hand, when the value is smaller than the above range, the bag breaking strength of the weakened layer and the like. Impact resistance decreases. further,
When the value of t ₂ / t ₀ is smaller than the above range, the protective effect of the weakened layer is lost, the toughness is reduced, the bag breaking strength is reduced, and the tear guideability is also easily reduced. If it is larger than the above range, the strength of the peaks becomes too large, so that stress concentration tends to occur in the valleys, and processing becomes difficult, which is not practical.

Further, when the packaging bag is composed of a laminated film, depending on the type of plastic material used as the outer layer and the inner layer film (for example, when a nylon film is used as the outer layer and a linear low density polyethylene is used as the inner layer, etc.) If the easy-opening portion is formed only on the outer film, the cut end face of the inner film may not be cut cleanly at the time of opening, and the spout may be in a lint-like state. When the spout is in such a state, the flow path is disturbed at the time of pouring, and it becomes difficult to stably pour the contents. Such a problem can be solved by easily opening the inner film as well as the outer film. In order to easily open the inner film, the laminated film can be machined by a roll, a knife, a grindstone, a laser, or the like from the inner film side of the laminated film, and the outer film can be penetrated from the outer film side to the inner film. It is also possible to form an easy-opening processing part that reaches. The easy-opening portion can be provided in a direction perpendicular to the longitudinal axis of the packaging bag, that is, in the horizontal direction, as shown in FIG. 1, and as shown in FIG. 2, with respect to the longitudinal axis of the spout. You may make it provide in a perpendicular direction.

The easy-opening portion can be formed, for example, at the same time as the slitting process, or at the time of bag making by a bag making machine. In addition, before lamination of the laminated film, it can be performed in advance on the film constituting the outer layer and / or the inner layer. The shape of the packaging bag of the present invention is not particularly limited, and examples thereof include a three-sided or four-sided sealed flat bag and a standing pouch. The contents to be filled in the packaging bag include not only liquid ones but also dry powdery or granular seasonings, retort foods, cosmetics and detergents.

[0022]

Next, the present invention will be described with reference to examples.
These examples do not limit the invention. (Example 1) A biaxially stretched nylon film having a thickness of 15 µm and a linear low-density polyethylene (LLDP) having a thickness of 130 µm
E) From the laminated film obtained by laminating the film via a urethane-based anchor agent, the detergent refill pouch of FIG. 1 was produced by the following steps. The laminated film is heated at a temperature 50 to 70 ° C. lower than the melting point of the nylon film,
Heating to 0 to 170 ° C., an opening assisting mechanism 3 whose cross-sectional shape at the time of bag making by embossing is shown in FIG. Linear bending preventing mechanism 4 whose cross-sectional shape is shown in FIG.
Was formed. Next, the nylon film layer serving as the outer layer is irradiated with a carbon dioxide gas laser to form the easily-opened portion 5, and then the periphery of the pouch is heated by a bag making machine, leaving a part of the upper end of the pouch (filling port for detergent). It sealed and obtained the detergent refill pouch of FIG. Add 50 grams of liquid detergent to this pouch.
After filling 0 ml, the container was sealed and subjected to horizontal and inverted drops 10 times each at a temperature of 5 ° C. from a height of 1.2 m, but there was no leakage of the detergent. The pouch can be easily opened by hand along the easy-opening processing section 5, and at the time of opening, the spout 2 having a large sectional area is easily formed by the opening assisting mechanism 3. In addition, the bend prevention mechanism 4 can prevent the bend of the spout 2 and transfer the detergent inside to a refill container while maintaining a stable flow to the end just by turning the pouch upside down after opening. Was completed.

Example 2 A biaxially oriented polyethylene terephthalate (PET) film having a thickness of 12 μm and a thickness of 13 μm
From a laminated film obtained by laminating a 0 μL LLDPE film via a urethane-based anchor agent, a detergent refill pouch having a PET film layer as an outer layer and a spout 2 shown in FIG. Manufactured. Also in this case, the laminated film is set at a temperature 5 points lower than the melting point of the PET film.
Embossing was performed by heating to a temperature lower by 0 to 70 ° C, that is, 170 to 190 ° C. This pouch can be easily opened by hand similarly to the pouch of Example 1. At the time of opening, the spout 2 having a large sectional area is easily formed, and the spout is prevented from being bent. Was able to be taken out with a stable flow to the end. Also, like the pouch of Example 1, the drop strength after detergent filling was excellent.

Example 3 Biaxially stretched PET having a thickness of 15 μm
From a laminated film obtained by laminating a film, an aluminum foil having a thickness of 7μ, and a polypropylene (PP) film having a thickness of 70μ via a urethane anchor agent between the respective layers,
In the same process as in Example 2, the PET film layer was used as the outer layer,
A cooked food refill pouch (retort pouch) having a spout 2 shown in FIG. 4 was manufactured. This pouch is used in Example 2.
The pouch can be easily opened by hand like the pouch, and the spout 2 having a large cross-sectional area is easily formed at the time of opening, preventing the spout from bending and stabilizing the contents to the end. I was able to take it out by the flow. Also, the drop strength when filling the contents was excellent.

The thickness, type, combination and the like of each film constituting the plastic film used as the packaging material of the packaging bag of the present invention can be widely selected according to the properties of the intended refilling packaging bag. It is needless to say that the present invention is not limited to those described in the above embodiments.

[0026]

According to the packaging bag of the present invention, when the packaging bag is opened and the contents are taken out, a spout having a large cross-sectional area can be easily formed by the opening assist mechanism, and the pouring can be prevented by the bend preventing mechanism. The outlet can be prevented from being bent and the contents can be easily taken out while maintaining a stable flow to the end. In addition, it can be manufactured inexpensively without requiring a special process, is not bulky during transportation and storage, and can be easily opened by hand by providing an easy opening processing portion at the spout. , And are of extremely high practical value.

[Brief description of the drawings]

FIG. 1 is an overall view showing one example of a packaging bag of the present invention.

FIG. 2 is a partially enlarged view showing another example of the packaging bag of the present invention.

FIG. 3 is a partially enlarged view showing another example of the packaging bag of the present invention.

FIG. 4 is a partially enlarged view showing another example of the packaging bag of the present invention.

FIG. 5 is a diagram showing a cross-sectional shape of an opening assist mechanism provided at a spout of a packaging bag.

FIG. 6 is a view showing a cross-sectional shape of a bending preventing mechanism provided adjacent to the opening assisting mechanism of the packaging bag.

FIG. 7 is a partially enlarged view showing still another example of the packaging bag of the present invention.

FIG. 8 is a partially enlarged view showing still another example of the packaging bag of the present invention.

FIG. 9 is a view showing a cross-sectional shape in a case where a bending preventing mechanism is provided in addition to the opening assisting mechanism of the packaging bag.

FIG. 10 is a diagram showing a cross-sectional shape of another example in which a bending preventing mechanism is provided in addition to the opening assisting mechanism of the packaging bag.

FIG. 11 is a diagram showing a cross-sectional shape of the easy-opening portion formed by laser processing using a carbide beam, which crosses the opening direction.

FIG. 12 is a diagram showing a cross-sectional shape of the easy-open processing portion in FIG. 11 along the opening direction.

FIG. 13 is a schematic view showing an arrangement state of the easy-opening processing section in FIG. 11;

FIG. 14 is a cross-sectional view for explaining a weakened layer of the easy-opening portion in FIG. 11;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refill packaging bag 2 Spout 3 Opening assist mechanism 4 Bending prevention mechanism 5 Easy-open processing part 6 Heat seal part 7 Valley part 8 Mountain part 71 Deep part 72 Shallow part

Claims (6)

[Claims] In a packaging bag formed by heat-sealing a plastic film, an opening assisting mechanism and a bend preventing mechanism provided adjacent to or adjacent to the opening assisting mechanism are provided on a portion serving as a spout after opening, and the plastic film is embossed. A packaging bag with a pouring function, characterized in that the packaging bag is formed in the form of: 2. The packaging bag with a pouring function according to claim 1, wherein an easy-opening portion is provided in the portion to be opened. 3. A plurality of easy-opening portions are formed by laser processing using a carbide beam. In the easy-opening portion, a relatively deep portion and a relatively shallow portion are arranged adjacent to each other or at small intervals along the opening direction. It is formed in a state where
3. The package with a pouring function according to claim 2, wherein a relatively deep portion of the easy-opening processed portions between adjacent ones is continuous, close, or overlapped with being adjacent or at a small interval. bag. 4. The packaging bag with a pouring function according to claim 1, wherein the opening assisting mechanism and the bending preventing mechanism are embossed so as to protrude outside the packaging bag. 5. The packaging bag with a pouring function according to claim 1, wherein the opening assisting mechanism and the bending preventing mechanism are embossed so as to protrude inside the packaging bag. 6. A packaging bag formed of a plastic laminated film comprising an outer film made of a nylon resin or a polyester resin and an inner film made of a polyolefin resin.
The packaging bag with a pouring function according to any one of claims 1 to 5, wherein an easily opened portion is formed on the outer layer film and / or the inner layer film.