JP3977284B2 - Packaging bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a packaging bag having a spout, and in particular, when a content in the packaging bag is poured out, the packaging can pour out the content without causing the root of the spout to adhere or bend. Regarding bags.
[0002]
[Prior art]
Conventionally, for example, liquid contents such as detergent are stored in a bottle equipped with a pump, taken out little by little through the pump when in use, and when the contents in the bottle are used up, the bottle is immediately discarded. Instead, the bottle is refilled with new contents and reused. As the contents to be supplemented, a packaging bag having a spout as shown in FIG. 9 is used. In FIG. 9, a packaging bag 1 is a self-supporting packaging bag in which a bottom 2 and a periphery 3 are fused, and a spout 4 is provided on the periphery thereof. When pouring out the contents for filling in such a packaging bag, the tip of the spout 4 is cut along the planned cutting line AA, and the packaging bag is tilted so that the spout 4 is at the bottom. And the spout 4 opens by the dead weight of the contents, and the contents are poured out.
By the way, since the synthetic resin film constituting the packaging bag has flexibility, it is difficult to secure the flow path of the spout due to the collapse of the flow path of the spout, and the spout does not open completely. There was a problem to do. Various means have been proposed to improve this point. For example, in a packaging bag whose periphery is sealed with a thermal bonding portion, a groove-shaped non-thermal bonding portion that communicates with the inside of the packaging bag serving as a spout is provided in the thermal bonding portion, and the groove-shaped non-thermal bonding is provided. A packaging bag is disclosed in which a reinforcing member made of a synthetic resin is attached to an adhesive portion (outlet) (Patent Document 1). In this packaging bag, it is intended to reliably pour out the contents by fixing the spout to the mouth of the container by applying the part where the reinforcing member provided at the spout is attached to another container. is there. Further, in Patent Document 2, a pouch in which the periphery is sealed by heat sealing, and the contents having fluidity are hermetically packaged, the pouch is provided with a spout at a part of the periphery of the pouch, and on the inner surface of the spout portion. A pouch with a spout is disclosed in which a heat-shrinkable film is fixed. This pouch with a spout opens a spout part in a cylindrical shape by contracting in the width direction of the spout part with a heat shrinkable film.
[Patent Document 1]
Japanese Patent Laid-Open No. 11-292092 [Patent Document 2]
JP, 11-91807, A In these packaging bags, the content pouring direction is made constant and the fear of spilling out is solved to some extent.
However, due to the relationship between the physical properties of the contents, such as viscosity, and the cross-sectional area, length, and shape of the flow path and opening of the spout, the content storage section of the packaging bag is pressed and poured out when the contents are poured out. There is a case. At this time, since the back pressure due to the outflow resistance from the channel of the spout is applied to the channel introduction part of the spout, an excavated ridge enters the channel introduction part near the base of the spout and the end of the channel is May be closed. In this case, even if the flow path of the spout is secured by various means, once closed at the end of the flow path on the base side of the spout, there is a problem that it is extremely difficult to open no matter how much pressure is applied.
[0003]
[Problems to be solved by the invention]
Therefore, as a result of various studies on the above-mentioned problems, the present inventors have pressed and poured out the contents of the packaging bag, so that the base of the spout has an exaggerated wrinkle and is closely attached or bent. As a result, the present invention has been completed by finding out that it is difficult to pour the contents as a result, and the object of the present invention is to remove the spout. It is an object of the present invention to provide a packaging bag that can be easily poured out while preventing creases near the base.
[0004]
[Means for Solving the Problems]
The gist of the present invention is to have a spout formed at the corner of the packaging bag by sealing the base material constituting the bag body and projecting diagonally upward of the packaging bag, and at least the spout except for the planned opening portion. A packaging bag in which a reinforcing layer is provided on the base material in the direction of the storage portion of the packaging bag from the flow path introducing portion, and the reinforcing layer extends from the flow path introducing portion in a direction along the upper side and the side side of the packaging bag. It is the packaging bag characterized by being. Then, a Turkey provided cutting line consisting of perforations or laser beam to the opening portions to be preferred.
Furthermore, it is desirable to provide a reinforcing layer also on the base material that forms the flow path of the spout, it is desirable that the reinforcing layer is a curable resin coating or a reinforcing piece sticking, and the reinforcing layer is installed as described above. Desirably outside the packaging bag.
That is, in the present invention, the flow path inlet portion of the spout of the packaging bag, i.e., as described later, a inlet of the flow channel, if the spout is present projecting corners, constituting the spout For this reason , a reinforcing layer is provided on the base material in the vicinity of the spout root portion where the side of the packaging bag has started to bend , extending in the direction along the upper side and the side of the packaging bag from the flow path introducing portion . When the contents are poured out from the spout, it is prevented that the extrudate is bent and adhered to the base material, and the spout is blocked.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail below.
The substrate in the present invention is a material conventionally used as a packaging material, for example, a substrate film such as a biaxially stretched polypropylene film, a biaxially stretched polyamide film, a biaxially stretched polyester film, or an ethylene-vinyl alcohol copolymer film. A composite film obtained by laminating an olefin-based heat adhesive resin such as low-density polyethylene, linear polyethylene, or ethylene-vinyl acetate copolymer polypropylene as a sealant layer is used. In this case, another layer may be laminated on the base material in order to enhance the protection of the contents. For example, an aluminum foil, a silica vapor deposition layer, an EVOH film, or the like is used to provide gas barrier properties. Although the form of a packaging bag is arbitrary, if it is a packaging bag for refilling, a self-supporting bag is preferable.
[0006]
The packaging bag according to the present invention has a spout. And the reinforcement layer was provided in the base material of the flow-path introduction part of a spout. The outlet channel introduction part means the inlet of the outlet channel, and means the point where the pressing force or the back pressure due to the pressing force is concentrated when the contents are poured out. Such points are not always constant due to the relationship between the physical properties of the contents such as pressing force and viscosity and the cross-sectional area, length, and shape of the flow path and opening of the spout. Often near the base of the exit. Normally, the spout protrudes from the packaging bag body, but in this case, it is in the vicinity of the portion where the peripheral seal of the spout begins to curve. However, when the spout is provided at the corner, and the corner is cut with scissors or hands without any notches, the flow inlet portion of the spout is located near the opening of the corner. It will be possible. Therefore, in this invention, there is no restriction | limiting in the position and shape of a spout.
And as a means for providing a reinforcing layer on the base material of the flow path introduction part of the spout, an energy ray curable resin such as an ultraviolet curable resin, an EB curable resin or a thermosetting resin is applied, or a resin having rigidity This is done by sticking a piece. UV curable resin includes ester acrylate obtained by reacting phthalic acid / 1,6-hexanediol / acrylic acid, urethane acrylate obtained by reacting tolylene diisocyanate / βHPA / polyester or polyol, glycidyl group of epoxy compound and acrylic acid Epoxies acrylate, melamine-formaldehyde condensates and urea-formaldehyde condensates with N-methylolacrylamide and β-hydroxyethyl acrylate, and functional groups such as carboxylic acid groups and epoxy groups An acrylic resin acrylate obtained by reacting an acrylic polymer with an acrylate having a group capable of reacting with these functional groups, an esterified product of an α, β-unsaturated dicarboxylic acid and a polyol (unsaturated polyester) and a styrene Such as those mainly comprising photopolymerizable oligomers such as a mixture of is used. The electron beam curable resin is an acryloyl compound. Examples of the thermosetting resin include an epoxy resin, an unsaturated polyester resin, a urea resin, a melamine resin, and a polyurethane resin.
[0007]
The reinforcing piece may be attached by heat bonding or bonding with an adhesive or the like, specifically, polyester (PET) or polypropylene having a thickness of about 50 to 500 μm. A resin piece having rigidity such as (PP) or nylon (NY) is preferable.
The shape of the reinforcing layer is not particularly limited, and its installation position extends from the vicinity of the base of the outlet of the packaging bag toward the storage portion of the packaging bag in the direction along the upper side and the side of the packaging bag. It is installed . Further, if necessary, it may be provided toward the tip of the spout. The reinforcing layer may be placed either on the inside or outside of the packaging bag film, but from the viewpoint of workability, it is preferable to provide it on the outside of the base material constituting the packaging bag, and one of the base materials constituting the packaging bag. It may be provided only on the surface or on both surfaces.
Furthermore, it is preferable to provide a planned cutting line for easy opening by hand near the tip of the spout of the packaging bag. The planned cutting line is a perforation or a laser line.
[0008]
Next, it demonstrates still more concretely with drawing. FIG. 1 is a plan view of a packaging bag having a spout according to the present invention. In FIG. 1, a packaging bag 1 has a bottom 2 and a periphery 3 fused, and has a spout 4 at a corner. And the reinforcement piece 5 made from resin is stuck on the base part of the spout 4 of the base material which comprises a packaging bag. This reinforcing piece 5 is formed by folding one reinforcing piece into two at a folding line that crosses diagonally, one of which is attached to the base material along the upper side of the packaging bag and the other part along the side side. To wear. After filling the packaging bag with the contents, the upper side is fused. In order to pour out the contents from the packaging bag, if the cutting line AA is cut and the spout 4 is tilted downward, the reinforcing piece 5 is attached to the base of the spout 4 so that the spout The flow path introduction part 4 can be easily poured out without being broken. In addition, it is preferable to provide the reinforcing layer in such a shape because when the contents are introduced into the flow channel, the vicinity of the center of the flow channel introduction portion where the flow rate is the highest is easily swelled and easily poured.
The shape when the reinforcing layer is provided is not particularly limited, and various shapes are possible. Exemplified below, FIGS. 2 to 6 are plan views of the spout portion, and FIG. 2 is a case where two pieces of reinforcing layers are provided at intervals so as to be directed in a direction in which fluid flows out of the spout, FIG. 3 shows a case where the whole is attached so as to be covered with one piece from the base of the spout to the storage portion. FIG. 4 shows the case where two long reinforcing layers are further provided at the tip of the spout, and a planned cutting line for manual tearing is provided at an intermediate portion thereof. FIG. 5 shows a reinforcing piece in the shape of a heart, which is excellent in design, and providing a reinforcing layer in such a shape makes it easy to swell near the center of the flow path introduction portion. FIG. 6 shows a case where two long reinforcing layers are provided so as to extend to the tip end portion of the spout, and the two pieces of elongated triangles are attached at intervals so that the fluid flows out from the spout. is there. Providing the reinforcing layer in such a shape is also preferable because the vicinity of the center of the flow path introduction portion is likely to swell. 7 and 8 are plan views of the entire packaging bag, and FIG. 7 is a case where two elongated reinforcing layers are provided along the upper side and the side side of the packaging bag. This is the case where a large reinforcing layer is provided including the base of the spout of the packaging bag.
[0009]
【The invention's effect】
As described above, the present invention provides the reinforcing layer on the base material of the flow path introduction portion of the outlet of the packaging bag so that the rigidity is maintained in that portion. This prevents wrinkles on the Ekbo in the vicinity of the roots of the product, and as a result, the base material can be poured out in a certain direction without sticking or bending, and further, in a more constant direction than the dispensing direction. It is easy to handle because it will not flow out and spill out. Moreover, the reinforcing layer is formed by a very simple method of applying a UV curable resin, an EB curable resin, or a thermosetting resin, or attaching a reinforcing piece made of a rigid resin. Since it is done by means, its manufacturing method is simple.
[Brief description of the drawings]
FIG. 1 is a plan view of a packaging bag according to the present invention.
FIG. 2 is an enlarged view of a spout portion in FIG.
FIG. 3 is an enlarged view of another spout portion in FIG. 1;
4 is an enlarged view of another spout portion in FIG. 1. FIG.
FIG. 5 is an enlarged view of a spout portion in FIG.
6 is an enlarged view of another spout portion in FIG. 1. FIG.
FIG. 7 is a plan view of another packaging bag according to the present invention.
FIG. 8 is a plan view of another packaging bag according to the present invention.
FIG. 9 is a plan view of a packaging bag having a conventional spout.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging bag 2 Bottom part 3 Periphery 4 Outlet 5 Reinforcement layer AA line Scheduled cutting line

Claims (5)

It has a spout formed at the corner of the packaging bag by sealing the base material constituting the bag body and projecting obliquely upward of the packaging bag, and at least from the flow path introduction portion of the spout except for the planned opening portion A packaging bag in which a reinforcing layer is provided on a base material in the direction of the storage portion of the packaging bag, wherein the reinforcing layer extends from the flow path introduction portion in a direction along the upper side and the side side of the packaging bag. Packaging bag to do. The packaging bag according to claim 1, wherein a planned cutting line made of a perforation or a laser beam is provided in the planned opening portion. Furthermore according to claim 1 or 2 packaging bag according to, characterized in that also provided a reinforcing layer on a substrate to form a flow path of the spout. The packaging bag according to any one of claims 1 to 3 , wherein the reinforcing layer is curable resin coating or reinforcing piece sticking. Packaging bag according to any one of claims 1-4 installed in the reinforcement layer is outside of the packaging bag.

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