JP3403522B2 - Liquid storage bag - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid storage bag for storing a liquid such as a detergent. 2. Description of the Related Art Conventionally, liquid detergents and the like used in homes and the like have been sold in containers made of synthetic resin. He purchased the refill detergent that came in, and refilled the refill detergent in an empty container. However, when refilling the detergent for refilling into an empty container as described above, the refilling operation is carried out by holding a flexible bag made of synthetic resin in a hand, and since the bag is flexible, the mouth of the bag is refilled. Position is unstable, and it takes time and effort to perform refilling work by aligning the mouth of the container with the mouth of the bag, and there is a problem that the detergent spills out of the container when careless. In order to solve this problem, a synthetic resin bag containing a refill detergent is placed in an empty container and protruded downward from a pump member with a nozzle serving as a liquid take-out portion provided at the upper end of the container. There is known a configuration in which a suction tube is inserted into the bag, and the detergent in the bag is taken out from a nozzle by operating the pump member up and down. In this case, not only the portion where the suction tube pierces, but also the entire bag is composed of a laminated film obtained by laminating a stretched nylon film and a polyolefin film, and the stretched nylon film is a suction tube by a force when the suction tube pierces. Has a property that it is easily torn by applying force in the direction of tearing at the tip of the suction film.Therefore, the force when piercing the suction tube into the bag causes a tear in the laminated film at the tip of the suction tube, and the suction tube penetrates. Air enters the bag from the crack around the hole
When the amount of the detergent inside the bag becomes small, there is a problem that even if the pump member is operated, air is sucked from the suction tube and the detergent inside the bag cannot be completely removed. In addition, when the container falls down, the detergent inside the bag leaks from the tear in the container, and there is a problem that the leaked detergent causes the inside of the container to become dirty and the detergent to leak out of the container. [0005] Incidentally, the above-mentioned bag made of a synthetic resin has no barrier property itself, and there is a problem that it is impossible to avoid deterioration of the liquid inside the bag. SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. Even when a tube is pierced into a bag, the hole in the bag does not crack and almost all of the liquid inside the bag is discharged. It is an object of the present invention to provide a liquid storage bag which is excellent in barrier property, in which the liquid inside the bag does not leak in the container even if the container falls down. SUMMARY OF THE INVENTION In order to solve this problem, the present invention provides a liquid storage in which a liquid such as a detergent is stored inside a container having a liquid outlet at the upper end. A bag, which has a sheet provided with a barrier layer made of a material having a barrier property over the entire bag, and a portion where a tube protruding downward from a liquid outlet is pierced, is formed of an unstretched nylon film and an unstretched polyolefin film. The gist is that a laminated film formed by laminating and bonding is laminated on a sheet provided with the barrier layer via an adhesive portion. As the liquid storage bag, a stand-pack type liquid storage bag, a tetrapot type liquid storage bag which can be placed upside down in a container, and four sides having heat seal at both ends in the longitudinal direction. A liquid storage bag that is closed by and is formed into a gusset shape, and the liquid stored therein is bent into the direction in which both ends in the longitudinal direction approach each other so that the liquid stored therein approaches the center, and the liquid storage bag has four sides in the circumferential direction. A liquid storage bag closed by heat sealing, a liquid storage bag that overlaps at least at one place in a palm-open state, and a portion thereof is closed by heat sealing. In these liquid storage bags, tubes protruding downward from the liquid outlet. A laminate film consisting of an unstretched nylon film and an unstretched polyolefin film laminated and adhered to the area where To the inside of the sheet with the rear layer is provided overlapping with an adhesive portion. As described above, in the liquid storage bag, by providing the barrier layer on the entire bag, the deterioration of the liquid inside the bag can be prevented, and the portion of the tube that projects downward from the liquid outlet is pierced. The lower end of the tube protruding downward from the liquid outlet by providing a laminated film formed by laminating and bonding an unstretched nylon film and an unstretched polyolefin film on a sheet provided with the barrier layer via an adhesive portion. When pierced into the laminated film of the bag, the hole in the pierced portion does not tear, it adheres to the tube, air does not easily enter the bag, and even if the amount of liquid inside the bag becomes small, almost all the liquid inside the bag is Can be taken out to the end. Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment shown in FIGS. 1 to 5 will be described. Reference numeral 1 denotes a bag for storing a liquid such as a detergent, which is provided with heat sealing portions 2 and 2 on at least two opposite sides. It has a swelling bottom 3 at the lower end and is in the form of a stand pack. As shown in FIG. 2, the body of the bag 1 is formed by laminating an unstretched polyolefin film layer 4a, a stretched nylon film layer 4b, a barrier layer 4c made of aluminum foil, and a stretched polyethylene terephthalate film layer 4d from the inner surface. The bottom 3 is provided with a laminated sheet 5 formed by laminating and adhering a barrier layer 5a made of aluminum foil and a layer 5b of an unstretched polyolefin film from the outer surface. A laminate film 6 in which an unstretched polyolefin-based film layer 6a, an unstretched nylon film layer 6b, and an unstretched polyolefin-based film layer 6c are laminated and adhered to the inside of a laminated sheet
And are provided in layers. Then, the unstretched polyolefin film layer 4a at the body and the unstretched polyolefin film layers 5b, 6a and 6c at the bottom 3 are formed.
Are fused by heat sealing to form a bag 1 in the form of a stand pack. FIG. 2 shows the heat seal portion in an enlarged manner, and the spot-shaped adhesive portion 7 is pressed and deformed by the heat seal. As the pressure-sensitive adhesive of the pressure-sensitive adhesive portion 7, for example, two kinds of resins, polypropylene and ethylene-vinyl acetate copolymer, were dispersed in an organic solvent, and the adhesive force of the ethylene-vinyl acetate copolymer was controlled by the amount of polypropylene. Or a material in which an inorganic substance such as calcium carbonate or magnesium carbonate is added to and dispersed in a urethane-based adhesive, and the adhesive force of the urethane-based adhesive is controlled by the amount of the inorganic substance. 5 unstretched polyolefin-based film layer 5b
Alternatively, the layer 6a of the unstretched polyolefin film of the laminate film 6 is coated. Numeral 8 denotes a vertically long synthetic resin container body having an open upper end for inserting the bag 1 containing the liquid such as the detergent in an upside-down state so that the bottom portion 3 is at the upper end. The opening is closed by a lid 9 made of the same synthetic resin as the container body 8. Holes 10, 10 are formed on both sides of the upper end of the container body 7.
The container body 8 and the lid 9 are connected to each other by engaging with 10, 10. A pump member 12 serving as a liquid take-out unit is mounted on the lid 9, and the lower end of a tube 13 projecting downward from the pump member 12 pierces the bottom 3 of the bag 1 located at the upper end, and near the lower end of the bag 1. It is located. Specifically, the tube 13 is made of a medium-density polyethylene or polypropylene, and is hardened. The tip of the tube 13 is obliquely cut and pointed, and the unstretched polyolefin film is formed on the bottom 3 of the bag 1 inside the laminated sheet 5. Layer 6a, unstretched nylon film layer 6b, and unstretched polyolefin-based film layer 6c are laminated and adhered to each other, so that when the tube 13 pierces the bottom 3 of the bag 1, The hole in the piercing portion of the laminate film 6 is the tube 13
It comes to adhere to. 14 is the pump member 12 for removing the liquid sucked by the tube 13
Is a nozzle provided as a liquid takeout port. When the bag 1 is put into the container main body 8, the liquid inside the bag 1 is turned upside down with the bag 1 turned upside down so that the bottom 3 of the bag 1 located at the upper end is flattened. The lower end and both sides of the bag 1 are bent to squeeze the bag 1, and the size of the inside of the container body 8 is set in advance so that this state can be maintained when the bag 1 is put into the container body 8. I have. Next, the method of use in the above configuration will be described. First, for example, the bag 1 for storing a liquid such as detergent at home is set upside down in the container body 8. At this time, the lower end and both sides of the bag 1 are bent such that the bottom 3 of the bag 1 located at the upper end of the bag 1 is flattened with the liquid inside the bag 1 turned upside down with the bag 1 turned upside down.
The bag 1 is set in the container body 8 in this state.
As a result, the bottom portion 3 of the bag 1 is flattened, and when the lid 9 is attached to the upper end of the container body 8, the pump member
Twelve tubes 13 can easily penetrate the bottom 3 of the bag 1.
If the lid 9 is attached to the upper end of the container body 8, the pump member
The liquid in the bag 1 is sucked up by the tube 13 when the head of the head 12 is pushed down and then returned upward, and the liquid is intermittently taken out from the nozzle 14 by repeating the operation several times. As described above, the bag 1 has a bottom 3 in which the unstretched polyolefin film layer 6a, the unstretched nylon film layer 6b, and the unstretched polyolefin film layer 6c are laminated and bonded inside the laminated sheet 5. 6, when the tube 13 pierces the bottom 3 of the bag 1, the bottom 3 of the bag 1
Is tightly adhered to the tube 13 without tearing, and it is difficult for air to enter the inside of the bag 1.
The liquid inside can be taken out to the end. Further, even if the container body 8 falls, the liquid inside the bag 1 does not leak inside the container body 8. In order to determine whether or not liquid leaks from the pierced portion when the tube 13 pierces the bottom 3 of the bag 1, a load of 80 kg is applied to the side of the bag 1 by applying a load of 80 kg. As a result of performing a compression resistance test in accordance with the compression resistance test of the third standard for additives and the compression resistance test of the container and package B-2, no liquid leakage was detected. The container body 8 may be transparent or opaque. If the container body 8 is transparent, the remaining amount of the liquid in the bag 1 can be confirmed from outside the container body 8. In addition, as shown by a two-dot chain line in FIG. 4, even if a window 15 is provided in the vertical direction near the lower end of the container body 8, the remaining amount of the liquid in the bag 1 can be confirmed. Further, the configurations of the container body 8 and the pump member 12 are not limited to those shown in the drawings. Further, a member having a liquid outlet and a tube may be used without having a pump function. The liquid to be taken out into the container body 8 is not only a detergent used in a kitchen or the like, but also a liquid seasoning such as oil or soy sauce, or a high-viscosity liquid such as milk, juice, or shampoo, rinse or treatment. Liquid or the like may be used. In the first embodiment, the liquid storage bag 1 is in the form of a stand pack. However, the liquid storage bag 1 may be of a tetrapot type as shown in FIG. 6, or may have four sides as shown in FIG. And a gusset type in which both ends in the length direction are closed by heat sealing. In the case of the liquid storage bag 1 of the tetrapot type, when the liquid storage bag 1 is set in the container main body, any one surface is set at the upper end, and at least one surface positioned at the upper end is set. Has a laminated sheet 5 formed by laminating and bonding a barrier layer 5a made of aluminum foil and a layer 5b of a stretched polyolefin film from the outer surface as shown in FIG. 2, and an unstretched polyolefin film inside the laminate sheet 5. The laminate film 6 is formed by laminating and bonding a layer 6a, a layer 6b of an unstretched nylon film, and a layer 6c of an unstretched polyolefin film. The remaining other surface is constituted by a laminated sheet formed by laminating and adhering an unstretched polyolefin film layer, a stretched nylon film layer, a barrier layer made of aluminum foil, and a stretched polyethylene terephthalate film layer from the inner surface. The gusset-type liquid storage bag 1 shown in FIG.
Uses two large and small sheets 16 and 17 having the same length and different widths, respectively, and aligns the length directions of these sheets 16, 16, 17, and 17, and places small sheets 17 and 17 between the large sheets 16 and 16. To form a tubular body by heat sealing, and fold the small sheets 17 and 17 inward at the center in the width direction to form the tubular body into a flat shape. Then, one end in the longitudinal direction of the flat tubular body is formed. After closing the portion by heat sealing and storing a liquid such as a detergent inside the tubular body, the flat tubular body has four surfaces formed by closing the other end in the longitudinal direction by heat sealing. is there. With respect to the material of the bag 1, except for the small one sheet 17, the remaining three sheets 16, 16, and 17 have a polyolefin-based film layer, a stretched nylon film layer, a barrier layer made of aluminum foil, and a stretched layer. The small one sheet 17 is composed of a barrier layer 5a made of aluminum foil and an unstretched polyolefin-based film layer 5b from the outer surface as shown in FIG. In addition to the laminated sheet 5 laminated and adhered, a layer 6a of an unstretched polyolefin film is provided inside the laminated sheet 5.
A laminate film 6 formed by laminating and bonding a layer 6b of an unstretched nylon film and a layer 6c of an unstretched polyolefin film is laminated on the laminated sheet 5. Double-sided adhesive tapes 18 are attached to the outer surface of one large sheet 16 near both ends in the longitudinal direction of the bag 1 configured as described above and containing a liquid such as a detergent. Then, the bag 1 for storing a liquid such as a detergent at home is put in the container body such that the small one sheet 17 is positioned at the upper end. At this time, the bag 1 is placed so that the liquid inside the bag 1 approaches the center.
As shown in FIG. 8, both ends in the length direction are bent in a direction approaching each other and overlapped on the outer surface of the one large sheet 16, and this state is held by the adhesive force of the double-sided adhesive tapes 18. As a result, the small sheet 17 of the bag 1 is stretched by the internal pressure, and the suction tube of the pump member is easily pierced into the small one sheet 17 located at the upper end of the bag 1. Although the embodiment of the present invention has been described above, the form of the bag 1 may be other than the above-described embodiments. In short, at least the portion of the pump member into which the suction tube is pierced is formed from the outer surface of the barrier layer 5a. A laminated sheet 5 is formed by laminating and bonding a layer 5b of a stretched polyolefin film, and a layer 6a of an unstretched polyolefin film, a layer 6b of an unstretched nylon film, and a layer 6b of an unstretched polyolefin film inside the laminate sheet 5. What is necessary is that the laminated film 6 formed by laminating and bonding the layer 6 c is laminated on the laminated sheet 5. Further, in the first embodiment, instead of the cross-sectional structure shown in FIG. 2, a cross-sectional structure as in another embodiment shown in FIG. 9 can be adopted. In the following, another embodiment shown in FIG. 9 will be described. At least at a portion where the suction tube of the pump member is pierced, the laminated sheet 5 is stretched from the outer surface, a layer 5c of polyethylene terephthalate film, a barrier layer 5a made of aluminum foil, Layer 5 of stretched polyolefin film
b is laminated and bonded. The barrier layers 4c and 5a may be made of an ethylene-polyvinyl alcohol copolymer, vinylidene chloride, or the like, in addition to the above-described aluminum foil. In the above description, the laminated sheet 5 and the laminated film 6 are joined via a large number of spot-shaped pressure-sensitive adhesive portions 7, but the pressure-sensitive adhesive portions may be provided obliquely in addition to the spot-shaped portions. It may be provided over the entire surface.
In any case, the peel strength is set to 5 so that unnecessary adhesive force is not generated between the laminated sheet 5 and the laminated film 6.
It is important to adjust the adhesive strength so as to be 0 gf / 15 mm (width) or less. As described above, according to the present invention, in a liquid storage bag, by providing a barrier layer over the entire bag,
A sheet provided with a barrier film comprising a laminate film formed by laminating and adhering an unstretched nylon film and an unstretched polyolefin film to a portion where a tube projecting downward from a liquid outlet is pierced, which can prevent deterioration of the liquid inside the bag. When the lower end of the tube protruding downward from the liquid outlet is pierced into the laminated film of the bag, the hole in the pierced portion is not torn when the lower end of the tube protrudes downward from the liquid outlet, and the tube adheres tightly to the tube. It is difficult for air to enter inside, and even when the amount of liquid inside the bag becomes small, the liquid inside the bag can be almost completely removed. Further, since the laminate film and the sheet provided with the barrier layer are connected via the adhesive portion, the laminate film and the sheet provided with the barrier layer do not separate from each other before heat sealing to form a bag.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a liquid storage bag, a container body, and a lid according to a first embodiment of the present invention. FIG. 2 is an enlarged sectional view of a main part of the liquid storage bag. FIG. 3 is a front view showing a state in which a liquid storage bag is set in the container main body and a lid is attached to an upper end of the container main body. FIG. 4 is a front view showing a state where a lid is attached to the container body. FIG. 5 is a sectional view of the same. FIG. 6 is a perspective view showing another example of the liquid storage bag of the present invention. FIG. 7 is a perspective view showing still another example of the liquid storage bag of the present invention. FIG. 8 is a perspective view showing a state immediately before the liquid storage bag is put into a container main body. FIG. 9 is an enlarged sectional view of a main part of a liquid storage bag according to another embodiment of the present invention. [Description of Signs] 1 bag 2 sealing portion 3 bottom 4 laminated sheet 4a layer of unstretched polyolefin film 4b layer of stretched nylon film 4c barrier layer made of aluminum foil 4d layer of polyethylene terephthalate film 5 laminated sheet 5a from aluminum foil Barrier layer 5b layer of unstretched polyolefin film 5c layer of stretched polyethylene terephthalate film 6 laminate film 6a layer of unstretched polyolefin film 6b layer of unstretched nylon film 6c layer 7 of unstretched polyolefin film 7 spot adhesive 8 container body 9 lid 10 hole 11 claw piece 12 pump member 13 tube 14 nozzle 16 sheet 17 sheet

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 30/02

Claims (1)

(57) [Claims] [Claim 1] A container provided with a liquid outlet at the upper end
A liquid storage bag to liquids is accommodated inside placed inside of which has a sheet having a barrier layer made of a material on the entire bag with barrier property, liquid
Part where the tube protruding downward from the outlet is pierced
Min, undrawn liquid storage bag, characterized in that the nylon film and an unstretched polyolefin film was laminated and bonded formed by laminating film was formed by stacking via an adhesive portion with respect to the sheet having the barrier layer.