JP4018872B2 - Aseptic filling gusset bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an aseptic filling gusset bag including a filling member.
[0002]
[Prior art]
Packaging bags comprising a filling member are preferably used for filling liquid products under aseptic conditions. Filling the packaging bag with the filling member with the liquid product is performed by sterilizing the packaging bag that has been sealed in advance with sterilization means such as electron beam or gamma ray, and then removing the liquid product from the filling member mounted on the packaging bag. Aseptic filling is performed, and then the packaging bag is sealed again while maintaining the aseptic condition. 6 and 7 show an example of a flat bag type packaging bag having such a filling member.
[0003]
FIG. 6 is a plan view (a) illustrating an example of a flat bag type packaging bag 61 including a filling member 63 and a dispensing member 64, and a cross-sectional view illustrating a structure (b) of the filling member 63. The packaging bag 61 is sterilized after being sealed in advance and supplied to the filling device. Then, when the packaging bag 61 is supplied to the filling device, the first membrane 65 heat-sealed so as to be in a sealed state on the outer surface of the bag of the filling member 63 is pierced, and liquid is filled therefrom. At this time, a second membrane 66 that is intermittently heat-sealed at a plurality of locations is provided on the bag inner surface of the filling member 63. The filled liquid is filled into the packaging bag through the gap 67 of the second membrane 66 which is not heat-sealed. Thereafter, the heating member is pressed from the surface of the constituent film 68 on the side where the filling member 63 is not provided, and the entire circumference of the second membrane 66 is fused to the bag inner surface of the filling member 63 and heat sealed. Resealed. The packaging bag 61 that can be filled by such a method can be liquid-filled in a state where the aseptic condition is sufficiently maintained, and is particularly preferably employed in the food industry.
[0004]
FIG. 7 is a plan view (a) showing another example of a flat bag type packaging bag 71 including a filling member 73 and a dispensing member 74, and a plan view showing an aspect in which a filling portion after filling is sealed. (B). The packaging bag 71 is also sterilized after being sealed in advance and supplied to the filling device, like the packaging bag 61 described above. Then, when the packaging bag 71 is supplied to the filling device, the membrane 75 heat-sealed so as to be in a sealed state on the outer surface of the bag of the filling member 73 is pierced, and liquid is filled therefrom. At this time, the second membrane 66 as shown in FIG. 6 is not provided on the bag inner surface of the filling member 73. The liquid is filled into the packaging bag through the filling member 73. Thereafter, in order to isolate the portion 77 provided with the filling member 73 from the portion 78 filled with liquid, the opposing constituent films are heat sealed to form the seal portion 76, and the portion 78 filled with liquid. Reseal. The packaging bag 71 that can be filled by such a method can be liquid-filled in a state where the aseptic condition is sufficiently maintained, and thus is particularly preferably employed in the food industry.
[0005]
[Problems to be solved by the invention]
However, in the packaging bag 61 described with reference to FIG. 6, the liquid filling is performed through the gap 67 of the second membrane 66 that is not heat-sealed. Moreover, even when the second membrane 66 is heat sealed and resealed, depending on the material, an undesirable phenomenon may occur due to contact with the liquid.
[0006]
Further, in the packaging bag 71 described with reference to FIG. 7, the sealing portion 76 that separates the portion 77 provided with the filling member 73 and the portion 78 filled with the liquid is formed and resealed, so that the liquid is filled. There is a problem that the volume of the packaging bag 71 that can be substantially reduced, and there is a problem that the packaging bag 71 must be enlarged as a result.
[0007]
The present invention has been made to solve the above-described problems, and provides a sterile filling gusset bag that can perform liquid filling easily and quickly and does not require an unnecessarily large packaging bag. .
[0008]
[Means for Solving the Problems]
The invention according to claim 1 is a sterile filling gusset bag in which a filling member and a dispensing member are provided on a bag body having gussets formed on both sides thereof, and the bag body comprises a front portion and a rear portion. A pair of flat surface portions and a pair of side surface portions protruding from the inner side of the bag body, the flat surface portions are sealed on four sides, and one corner of the flat surface portion is filled with the filling portion. A member is provided, an oblique seal portion is formed at the other corner of the flat portion, and the extraction member is provided at an intermediate position of the corner of the flat portion.
[0009]
According to the present invention, the filling member is provided at one corner of the flat portion, and the skew seal portion is formed at the other corner of the flat portion. That is, since the skew seal portion is not formed at one corner where the filling member is provided, the content can be easily and quickly filled from the filling member when filling the content. After filling the contents, by forming an oblique seal portion at the corner, the corner where the filling member is provided and the portion filled with the content are isolated and easily resealed be able to. Moreover, since the filling member is provided at the corner that does not substantially affect the filling amount of the contents, the volume of the gusset bag that can be filled with the contents is not substantially reduced.
[0010]
According to a second aspect of the present invention, in the aseptic filling gusset bag according to the first aspect, an oblique seal portion formed after aseptic filling is provided at one corner portion where the filling member is provided. It is characterized in that a part of is formed in advance.
[0011]
According to the present invention, in one corner where the filling member is provided, a part of the oblique seal portion which is formed after aseptic filling is formed in advance, so that the contents are filled. Then, it is possible to easily form the skew seal portion that is formed thereafter.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
The aseptic filling gusset bag of the present invention will be described with reference to the drawings. The hatching shown in FIGS. 1 to 3, 6, and 7 represents a sealed portion.
[0013]
FIG. 1 is a front view showing an example of the gusset bag 1 of the present invention in a state where the contents are not filled. FIG. 2 is a perspective view of the corner 22 where the filling member 3 is provided after the contents are filled. It is a top view of the gusset bag 1 which shows the form which formed row seal part 16 and resealed, FIG. 3 is a perspective view which shows an example of the gusset bag 1 of the state filled with contents, and FIG. FIG. 5 is an explanatory view showing an example of the end face of the gusset bag 1, and FIG. 5 is a perspective view showing an example of the filling member 3.
[0014]
As shown in FIG. 1, the gusset bag 1 of the present invention is for aseptic filling including a bag body 2 in which gussets are formed on both sides, and a filling member 3 and a dispensing member 4 provided on the bag body 2. The gusset bag.
[0015]
This gusset bag 1 contains various contents such as beverages such as drinking water, coffee, soup, wine, liquor, milk, milk beverages, flavor seasonings such as soy sauce and sauces, car oil, detergents, industrial chemicals, etc. It can be filled with chemical products. The content may be a solid-containing liquid or a fluid other than a liquid such as powder. Moreover, the capacity | capacitance of the gusset bag 1 can also be changed freely, for example, can apply widely from household use of about 5 liters to business use of about 20 liters or more. The gusset bag 1 filled with the contents is generally in the shape of a cube or a rectangular parallelepiped (see FIG. 3).
[0016]
First, the bag body 2 will be described.
[0017]
The bag body 2 is composed of a pair of flat surface portions 7 constituting the front surface portion 5 and the rear surface portion 6, and a pair of side surface portions 10 from which the folded portion 8 protrudes inside the bag body 2. The flat surface portion 7 and the side surface portion 10 are usually made of a square or rectangular synthetic resin film.
[0018]
As shown in FIG. 1, a top seal portion 11, a bottom seal portion 12, and left and right side seal portions 13 and 14 are formed on the periphery of the bag body 2. Each of such seal portions 11,..., 14 is formed by sealing the four inner sides of the flat surface portion 7 to the contact portions of the flat surface portion 7 and the side surface portion 10 facing each other. Each seal portion is usually formed by a heat seal method. In addition, as shown in FIG.4 (b), a part of side part seal part can also be abbreviate | omitted by bending and forming the film for forming the bag main body 2. FIG.
[0019]
The flat surface portion 7 and / or the side surface portion 10 of the bag body 2 may have a shock-absorbing structure formed by at least two synthetic resin films that are overlapped without being bonded. Here, “formed by at least two superimposed synthetic resin films” means that a plurality of synthetic resin films are separated or have a structure in which they can be separated. .
[0020]
The material resin, thickness, etc. of each synthetic resin film or each layer in the film are appropriately determined in consideration of various conditions such as properties of the contents and strength required for the bag. In general, the outer film or layer is determined with an emphasis on performance such as strength and wear resistance required in relation to the external environment. On the other hand, the inner film or layer is determined with emphasis on performance such as water resistance, chemical resistance, gas barrier property or sealability required in relation to the internal environment. In the present invention, the four sides of the flat surface portion 7 are heat-sealed, and the oblique seal portions 15 are formed at the respective corner portions 21, and after the contents are filled, the corner portions where the filling member 3 is provided. Since the skew seal portion 16 is formed at 22, it is necessary to have a configuration that can withstand the heat at the time of heat sealing.
[0021]
For example, the plane part 7 and the side part 10 of the bag body 2 may be a single layer film or a composite film composed of an outer film and an inner film, and are not particularly limited. As a specific example in the case of a composite film, the layer configuration of the outer film [outer layer / intermediate layer / inner layer] is 15 μm stretched nylon (ON) / 20 μm polyethylene (PE) / 60 μm linear low density polyethylene. (LLDPE) and the inner film can be a 60 μm LLDPE monolayer film. Specific examples of other composite films include (1) outer film [from outside to inside, 15 μm polyvinylidene chloride coating ON layer (K coating ON) / 20 μm PE / 60 μm LLDPE] and inner film [60 μm LLDPE], (2) outer film [12 μm metallized polyethylene terephthalate layer (VMPET) / 15 μm ON / 20 μm PE / 60 μm LLDPE] and inner film [60 μm LLDPE], (3) outer film [15 μm ON / 20 μm PE / 60 μm LLDPE / ON / LLDPE co-extruded film] and inner film [60 μm LLDPE / ON / LLDPE co-extruded film], (4) Outer film [15 μm ON / 20 μm PE / 60 μm LLDPE・ Ethylene-vinyl alcohol Polymer (EVOH) / LLDPE coextruded film] and inner film [60 μm LLDPE / EVAL / LLDPE coextruded film], (5) Outer film [12 μm silica-deposited polyethylene terephthalate layer / 15 μm ON / 20 μm PE / 60 μm LLDPE] and inner film [60 μm LLDPE], (6) outer film [12 μm alumina-deposited polyethylene terephthalate layer / 15 μm ON / 20 μm PE / 60 μm LLDPE] and inner film [60 μm LLDPE], etc. Can be illustrated.
[0022]
In the above example, ON is effective for improving the strength, and K-coat ON, VMPET, and EVOH are effective for improving the barrier property. The above (3) is particularly suitable when it is desired to improve the strength. At least one layer in the synthetic resin film may be a metal foil layer such as an aluminum foil.
[0023]
Next, the form of the corners 21 and 22 will be described.
[0024]
On the top side and the bottom side of the bag body 2, there are four corners in each of the pair of plane parts 7, for a total of eight corners. In the present invention, the filling member 3 is located in one corner 22. The skew seal portion 15 is formed in the other seven corners 21 provided. The skew seal portion 15 referred to here is a linear seal portion sealed in such a form that the corner portion 21 is cut obliquely. In addition, the skew seal part 15 is not formed in one corner where the filling member 3 is provided.
[0025]
In the corner portion 21 where the skew seal portion 15 is formed, a triangular fin portion surrounded by the top seal portion 11 or the bottom seal portion 12, the side seal portions 13 and 14, and the skew seal portion 15. 18 is formed. Since the internal space of the fin portion 18 is completely blocked from the internal space of the bag body 2 by the skew seal portion 15, the filled contents do not enter the internal space of the fin portion 18. Further, the auxiliary seal portion 17 can be formed on the fin portion 18.
[0026]
The skew seal portion 15 linearly seals the inner surfaces of the bag body 2 facing each other from an arbitrary position of the top seal portion 11 or the bottom seal portion 12 to an arbitrary position of the side seal portions 13 and 14. It is formed. Such a skew seal portion 15 has a function of guiding the contents to the mounting portion of the extraction member 4 when the contents are extracted. Furthermore, the function of making the shape of the gusset bag 1 after filling the contents close to a rectangular parallelepiped or cube close to the outer box, the function of giving the gusset bag 1 independence, and the gusset bag 1 are loaded. It also has a function of dispersing impact stress to improve the impact resistance of the gusset bag 1.
[0027]
The arbitrary position P is preferably as close as possible to the intersection of the top seal portion 11 and the bottom seal portion 12 and the gusset folding portion 8 from the viewpoint of making the gusset bag 1 at the time of filling as close to a cube or a rectangular parallelepiped as possible. . For this reason, the arbitrary position P is normally provided within a range of ± 1 cm from the intersections of the top seal portion 11 and the bottom seal portion 12 and the folding portion 8, preferably on the intersection. From the same point of view, the skew seal portion 15 formed in advance in each corner 21 or the skew seal portion 16 formed in the corner portion 22 after filling the contents is the right side and left side, front side and rear side of the bag body 2. It is preferable that the oblique seal portions in the positional relationship between the side and the top side and the bottom side are as symmetrical as possible. Further, from the same viewpoint, it is preferable that the oblique seal portions 15 and 16 are formed so that the fin portion 18 has a shape as close to a right-angled isosceles triangle as possible.
[0028]
In addition, as shown in FIG. 1, only a part of the seal portion 19 is previously provided in the corner portion 22 where the oblique seal portion 16 is formed after the contents are filled, that is, the corner portion 22 where the filling member 3 is provided. Is preferably formed. In particular, by forming in advance a seal portion 19 that forms a part of the skew seal portion 16 to be formed later from the top seal portion 11 side or the bottom seal portion 12 side, the heating member after filling the contents Handling becomes easy, and the skew seal portion 16 as shown in FIG. 2 can be easily formed.
[0029]
In addition, the gusset bag 1 can be arbitrarily formed with a self-supporting auxiliary seal portion (not shown) that functions as a leg portion after filling the contents. The self-supporting auxiliary seal portion is provided on each of the pair of flat surface portions 7 (the front surface portion 5 and the rear surface portion 6) so as to bond the inner surfaces of the flat surface portions 7 facing each other in a state where the flat surface portion 7 is pinched. It is a linear strip-shaped seal portion formed as described above, and is provided so as to extend horizontally at a height that becomes a boundary between the trunk portion and the bottom portion of the gusset bag 1 after the contents are filled.
[0030]
The triangular fin portion 18 is an unnecessary portion for the gusset bag 1 in nature. Therefore, as shown in FIG. 3, it is preferable to bond the corners of the top seal portion 11 on the front side and the back side of the bag body 2. By doing so, the fin portion 18 does not get in the way, and the bag wall of the portion where the upper and lower surfaces of the outer box are filled with the contents is not in direct contact with the fin portion 18. When bonding the corners, the vicinity of the corners may be further bonded. For example, the top seal portions 11 or the bottom seal portions 12 facing each other on the front side and the back side of the bag body 2 may be bonded continuously or discontinuously to the bonding portion at the corner. Such an adhesive portion may be a belt-like seal portion, or may be a point seal portion (spot seal portion) such as a circle, an ellipse, or a rectangle.
[0031]
Next, the filling member 3 and the dispensing member 4 will be described.
[0032]
The filling member 3 is provided at one corner 22 where the skew seal portion 15 is not formed. By providing the filling member 3 in such a position, when filling the contents, the contents can be easily and quickly filled from the filling member 3 (see FIG. 1), and the contents are filled. Later, an oblique seal portion 16 is formed at the corner 22 (see FIG. 2), and the portion where the filling member 3 is mounted and the portion filled with the contents are separated and easily re-applied. Can be sealed.
[0033]
In addition, since the corner 22 where the filling member 3 is provided is a portion that does not substantially affect the content filling amount in the gusset bag 1, the volume capable of filling the content is substantially reduced. There is nothing. Therefore, it is not necessary to enlarge the gusset bag 1 more than necessary in order to increase the capacity.
[0034]
The filling member 3 is usually an injection-molded product made from a polyolefin-based material such as polyethylene or polyethylene terephthalate. And the shape is not specifically limited, The conventional filling member 3 can be employ | adopted. FIG. 5 is a perspective view showing an example of such a filling member 3.
[0035]
In general, as shown in FIG. 5, the filling member 3 includes a joining flange 51 that is fused to the inner surface of the synthetic resin film that constitutes the flat surface portion 7, and a sealing film 54 that protrudes outside the flat surface portion 7. It is mainly composed of a mouth flange 52 and a body portion 53 to be fused. As a means for sealing the mouth flange 52, as described above, a method of fusing the sealing film 54 may be adopted, but any other sealing method for screwing or fitting the cap may be used. May be adopted.
[0036]
Since the above-mentioned filling member 3 provided with the mouth flange 52 to which the sealing film 54 is fused can pierce the sealing film 54 and fill the contents from there when filling the contents, The contents can be easily and quickly filled into the gusset bag.
[0037]
The pouring member 4 is provided at an intermediate position of the corner on the top side or an intermediate position of the corner on the bottom side in the flat surface portion 7 of the bag body 2. In particular, as shown in FIG. 1, it is formed at a middle position between the top corners 21 and 22 of the front surface portion 5 of the bag main body 2 and after the pre-formed skew seal portion 15 and the contents are filled. It is preferable to be provided between the skew seal portion 16.
[0038]
The dispensing member 4 is usually an injection-molded product made from a plastic material such as polyethylene, and the shape thereof is not particularly limited, and a conventional dispensing member can be adopted. If an example (not shown) of the dispensing member 4 is described, a joint that is supported by being bonded to an inner surface of a synthetic resin film constituting the front portion 5 and a mouth portion that protrudes from the front portion 5 of the bag body 2. A screw thread for closing with a cap is formed on the upper side of the mouth part, and the gusset bag 1 is suspended by a rail or the like and transferred to the lower side of the mouth part. Support flanges for aligning and aligning may be provided at intervals in the vertical direction. At this time, if the above-mentioned support flange is used, the gusset bag 1 or its semi-finished product can be lifted, transferred, or aligned by a rail or the like, which is convenient.
[0039]
Next, an example of a method for manufacturing the gusset bag 1 will be described.
[0040]
First, a front part film, a rear part film, a right side part film, and a left side part film formed by previously bonding the joining flange 51 of the filling member 3 and the joining flange of the extraction member 4 to the inner surface thereof, respectively. Feed out from the roll. A gusset folding portion 8 is formed in advance on the side surface film. Then, each film is continuously supplied to the side seal portion forming means while being long, and the side seal portions 13 and 14 of the four original fabric films are joined to each other. Next, the long film coming out from the side seal portion forming means is supplied to the top, bottom and skew seal portion forming means, and the top seal portion 11 and the bottom seal portion 12 crossing the long film are skewed. The seal portion 15 is formed. In addition, the pouring member 4 is attached to the bag body 2 by bonding the joint portion and the inner surface of the front surface portion 5 at an arbitrary position in the above-described process. It is preferable that a seal portion 19 having a predetermined length is formed in advance in the corner portion 22 provided with the filling member 3 as necessary. In addition, the obtained gusset bag 1 is cut | disconnected as needed, or is packed with a long coupling body. The gusset bag 1 thus obtained is then supplied to the content filling device and filled with the content.
[0041]
As described above, in the gusset bag 1 of the present invention, the filling member 3 is provided at the corner portion 22 where the skew seal 15 is not uniquely formed. The contents can be filled easily and quickly. After the contents are filled, the oblique seal portion 16 is formed at the corner 22 to isolate the filling member 3 from the portion filled with the contents. There is an advantage that it can be easily resealed. In addition, since the filling member 3 is provided at a corner that does not substantially affect the content filling amount, there is also an advantage that the volume that can be filled with the content is not substantially reduced.
[0042]
【The invention's effect】
As described above, according to the aseptic filling gusset bag of the present invention, when filling the contents, the contents can be easily and quickly filled from the filling member, and after filling the contents, A gusset bag which can be re-sealed easily by forming an oblique seal portion at the corner to isolate the filling member and the portion filled with the content and refilling the content. There is a special effect that the volume of the battery is not substantially reduced.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a gusset bag of the present invention in a state where contents are not filled.
FIG. 2 is a plan view of a gusset bag showing a form in which an oblique seal portion is formed in a corner portion where a filling member is provided after the contents are filled and resealed.
FIG. 3 is a perspective view showing an example of a gusset bag filled with contents.
FIG. 4 is an explanatory view showing an example of an end face of a gusset bag.
FIG. 5 is a perspective view showing an example of a filling member.
6A is a plan view showing a conventional example of a conventional flat bag type packaging bag including a filling member and a dispensing member, and FIG. 6B is a cross-sectional view illustrating a structure (b) of the filling member.
FIG. 7A is a plan view showing another conventional example of a flat bag type packaging bag having a filling member and a dispensing member, and FIG. 7B is a plan view showing a state in which a filling portion after filling is sealed. is there.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gazette bag 2 Bag main body 3,63,73 Filling member 4,64,74 Outlet member 5 Front surface part 6 Rear surface part 7 Flat part 8 Folding site | part 10 Side surface part 11 Top part seal part 12 Bottom part seal part 13, 14 Side seal Portions 15 and 16 Skew seal portion 17 Auxiliary seal portion 18 Fin portion 19 Seal portions 21 and 22 Corner portion 51 Joint flange 52 Portion flange 53 Body portion 54 Sealing film 61 and 71 Packaging bags 65 and 75 First membrane 66 First Two membrane 67 Gap 68 Constituent film 76 Isolation seal part 77 Part provided with filling member 78 Part filled with liquid

Claims (2)

A sterile filling gusset bag in which a filling member and a dispensing member are provided on a bag body having gussets formed on both sides,
The bag main body includes a pair of flat surface portions constituting a front surface portion and a rear surface portion, and a pair of side surface portions from which a folded portion protrudes inside the bag main body, and the flat surface portion is sealed on all four sides, The filling member is provided at one corner of the flat portion, an oblique seal portion is formed at the other corner of the flat portion, and the dispensing member is disposed at an intermediate position of the corner of the flat portion. A gusset bag for aseptic filling, characterized in that is provided. 2. The skew seal portion to be formed after aseptic filling is formed in advance in one corner portion where the filling member is provided, according to claim 1. Aseptic filling gusset bag.

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