JP3051785B2 - Pillow type packaging bag for food filling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pillow-type food packaging bag for filling and packaging light foods such as snacks, and more particularly, to a pillow-type food packaging bag. A new type of pillow-type food filling characterized by improving the shape and structure of at least the lower end seal portion and stochastically reducing the possibility that holes (so-called tunnels) are visible at the back seal portion of the seal portion. The present invention relates to a packaging bag for use and a seal bar used for forming a sealed portion of the packaging bag.

[0002]

2. Description of the Related Art Conventionally, a light-food-filled packaging bag, which is filled with light foods such as snacks and wraps, usually has a lower end of a long packaging material formed in a continuously supplied cylindrical shape. It is manufactured by sealing and filling with light foods such as snacks, then end-sealing the upper part, then cutting, depending on the shape of the packaging material at the time of sealing,
A pillow-type packaging bag in which the upper and lower openings of the cylindrical body are tightly sealed as they are, and the cylindrical body, that is, both sides of the packaging bag, in the upper and / or lower end seal portions of the cylindrical body Fold the surface inward to the appropriate width,
A gusset-type packaging bag which is end-sealed in a state where an inner crease portion is formed is known as a main one.

[0003] Among these packaging bags, pillow type packaging bags are generally widely used as packaging bags for soft foods such as potato snacks which are soft and relatively large.
In addition, gusset-type packaging bags are widely used mainly for standing up on display shelves, etc., since a certain width can be taken on both sides of the bag, for example, various puffed snacks etc. It is widely used as a packaging bag for various foods, such as beverage powders such as milk cocoa and ice coffee, as well as the light foods.

[0004] However, taking a conventional pillow type packaging bag as an example and looking at products using the packaging bag, for example, a packaging bag usually used for light foods such as potato snacks and puffed snacks is shown. In the upper or lower end seal part of the packaging bag, the back seal part is overlapped with four sheets, so when performing end seal,
Since the pressure of the seal bar is not uniformly applied to the entire sealing surface, and the entire seal width from both sides to the central portion is uniform, a hole (tunnel) is formed in the back seal portion as shown in FIG. However, there is a problem in that the fear is probable to be probable.

[0005] When a hole (tunnel) is revealed, especially in the case of light foods such as snacks, the outside air is ventilated into the bag to moisten the food therein, or the air inside the bag escapes to transport the food. In addition, the food in the bag was easily broken, causing a loss of commercial value.

[0006] In addition, in the case of a packaging bag usually used for beverage powder such as milk cocoa, four seals at the inner fold portion are overlapped at an end seal portion at a lower portion of the packaging bag, and further, a back seal is provided. The four parts are overlapped (the remaining central part is two sheets), the seal of the inner fold part is four sheets, and the back seal part is six sheets (the remaining part is two sheets) In each case, the pressure of the seal bar is unlikely to be evenly applied to the entire sealing surface at the time of end-sealing, as in the above case. Since the seal width reaching the central portion is uniform, there is a problem that the possibility that a hole (tunnel) is evident in the inner fold portion or the back seal portion increases with probability.

As described above, among the food packaging bags, the pillow-type packaging bag used as a packaging bag for light foods such as snacks has a seal width of an end seal portion at the top or bottom of the packaging bag of at most about 1 cm. Most of them are small in size and formed to have a uniform width.On the other hand, although the type of the packaging bag is different, in part, a sealing portion at the bottom of the packaging bag such as a beverage powder such as milk cocoa. As can be seen, there is a so-called inverted arch type in which the width of the seal is wider at both sides than at the center of the packaging bag.

However, even in the packaging bag having the inverted arch-shaped end sealing portion, the sealing width of the central portion including the back sealing portion of the packaging bag is as narrow as that of a normal one. As in the case of a normal pillow-type packaging bag in which the seal portion is formed to have a uniform width, there is a problem that the possibility that a hole (tunnel) is formed in the back seal portion increases with probability.

[0009]

SUMMARY OF THE INVENTION Accordingly, the present inventors
As a result of intensive research aiming at solving various problems of the food filling packaging bag for filling such conventional snacks and other light foods, by changing the sealing form of the sealing portion of the packaging bag. The present inventors have found that the intended purpose can be achieved, and have completed the present invention.

That is, according to the present invention, there is a fear that a hole (tunnel) may be formed in at least a lower end seal portion of a conventional pillow-type food packaging bag for filling light foods such as snacks. It is an object of the present invention to provide a pillow-type food packaging bag with a low probability.

[0011] The present invention also provides a pillow-type food-filling packaging bag in which a hole (tunnel) is less likely to be formed in a back seal portion of the packaging bag at least at a lower end seal portion of the pillow-type food-filling packaging bag. It is intended to do so.

Further, the present invention provides a pillow-type packaging bag for filling food, wherein the shape of the bottom portion is formed into an approximately elliptical shape connected to an arch when filling a pillow-type packaging bag with light food. It is intended to provide.

[0013] In the present invention, the width of the seal at the end seal portion at least at the lower portion of the packaging bag is wider at the center portion thereof than at the sides on both sides of the packaging bag. It is an object of the present invention to provide a pillow-type food packaging bag formed as described above.

[0014] In addition, the present invention is, and less of the packaging bag
It is an object of the present invention also provides a seal bars seal surface used is formed in a substantially arched for sealing the end seal portion of the lower substantially arched.

[0015]

SUMMARY OF THE INVENTION The configuration of the present invention for achieving the above object, is made of the following technical means.

[0016]

( 1 ) A pillow type food filling packaging bag in which at least a lower end seal portion of a pillow type food filling packaging bag is sealed with a seal bar,
By using an arch-shaped seal bar whose seal surface is formed in an arch shape as a seal bar, the seal width of a central portion including a back seal portion located substantially at the center of the back surface of the packaging bag is reduced. A pillow-type food-filling packaging bag formed wider than the seal width.

( 2 ) The arch type seal bar according to the above (1)
An arch-shaped seal bar used to form at least a lower end seal portion of a pillow-type food-filling packaging bag into a substantially arch shape with at least a lower portion of the packaging bag as a bottom side.

Next, the configuration of the present invention will be described in detail. As described above, the present invention has a feature in the configuration of at least the lower end seal portion of the pillow type food packaging bag, and particularly, at least the lower end seal portion of the packaging bag. The greatest characteristic is that the seal width of the central portion including the back seal portion located substantially at the center of the back surface of the packaging bag is formed wider than the seal widths of both sides.

The pillow-type packaging bag will be described in detail. The packaging bag of this type is usually formed by continuously sealing a continuous packaging bag material formed of a long article formed in a cylindrical shape at an appropriate vertical position and an end seal. It is formed by cutting, and usually a back seal portion is formed at a position substantially at the center of the back (back side) of the packaging bag. However, the present invention is not limited to this type, and the back seal is not limited to this type. Even if the seal portion is located on the side portion of the packaging bag or the like, it can be applied as appropriate.

The material of the packaging bag is not particularly limited, but typical examples are OPP (stretched polypropylene) / VMCPP (deposited casting polypropylene), OPP / VMPET (deposited polyethylene terephthalate) / CPP, PET / VMPET / CP
A packaging bag material such as P is exemplified.

In order to end seal at least the lower part of the packaging bag made of these materials, a back seal portion of the packaging bag is layered, and a proper sealant material such as CPP is used for the sealing portion. For example, a method of performing a sealing process by a method is employed. In this case, there are a type in which the back seal portion is layered four times and sealing, a type in which only the inside of the main body is double-sealed without layering the back seal portion, and the like. Either type can be used as appropriate.

The sealing conditions such as temperature, pressure and time for the sealing process are not particularly limited, but are usually about 120 to 240 ° C. and about 0.2 to 1.5 seconds. Appropriate pressure conditions according to the type, thickness and the like are appropriately selected.

As the wrapping machine used for producing the pillow type food packaging bag of the present invention, an appropriate type can be used, and there is no particular limitation. Both back seals and end seals are generally filled with lump such as snacks and ramen, such as vertical pillow packaging machines and horizontal pillow packaging machines equipped with air cylinders and seal bars driven by mechanical drive units. The appropriate type of device used in the case can be used.

The form of the seal at the seal portion may be a serrated seal with a horizontal streak formed on the seal surface for both the back seal and the end seal, a solid seal with the seal portion formed solid, other embossed, meshed Any of these types can be used as appropriate.

The sealing form of the sealing portion of the packaging bag, at least the lower portion of the packaging bag, since it is necessary to widely form a seal of the back seal portion of the packaging bag, at least the lower end seal portion of the packaging bag The seal width at the central portion is formed wider than the seal width at both sides.

As a specific form of the end seal portion, as shown in FIG. 1, at least the lower end seal portion of the packaging bag is formed in a substantially arch shape having the at least lower end portion as a base. Also, as shown in FIG. 2, the seal width is formed wider than both sides in the substantially rectangular range of the central portion including the back seal portion, and as shown in FIG. In only a certain range including the seal portion, a seal portion having a wide seal width is exemplified as a typical example.

As described above, the form of at least the lower end seal portion of the pillow type food-filling packaging bag of the present invention is such that the sealing portion in the range covering the back seal portion located substantially at the center of the packaging bag is formed. The shape is not particularly limited as long as it is formed wider than both sides, and an appropriate shape can be used.

By specifying the form of the end seal portion at least in the lower part of the pillow-type food packaging bag as described above, the packaging bag of the present invention has been difficult to completely prevent. Occurrence of holes (tunnels) in the seal portion can be reduced stochastically, and in the case of a pillow-type packaging bag, quality control at the time of production thereof can be further ensured.

The characteristics of the pillow-type food packaging bag of the present invention cannot be obtained with a conventional ordinary pillow-type packaging bag. This is unique to the packaging bag of the present invention obtained only by adoption.

The packaging bag of the present invention is particularly applied to a pillow type packaging bag, and is a normal potato snack having four back seal portions formed at the lower end seal portion. A pillow-type packaging bag used for light foods such as puffed snacks, as well as a type of packaging bag in which the back seal portion is located in the side direction and the central seal portion is formed in two layers, and The present invention can be applied to a pillow type in which the back seal portion is not layered and only the center portion is formed in two layers, or an appropriate type of packaging bag. In addition, the present invention is not limited to such a type of packaging bag, and any type of pillow type packaging bag can be applied to an appropriate type of packaging bag. .

Further, the shape of the sealing surface of the seal bar of the sealing machine for forming the end sealing portion at least at the lower portion of the packaging bag of the present invention is of a type that can form the sealing portion of the packaging bag into the arch shape. What is used, that is, the one in which the sealing surface of the seal bar is formed in an arch shape is preferably used, but it is not limited to the shape, of course, as long as the shape matches the shape of the sealing portion. Any of them can be used as appropriate.

[0033]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIGS. 1 to 3 show a long object made of a packaging bag material A formed of OPP (stretched polypropylene) / VMCPP (vapor-deposited casting polypropylene) and formed in a cylindrical shape. And a pillow-type packaging bag formed by cutting and forming a seal portion B at a lower portion. FIG. 4 shows a cross section of a back seal portion in an end seal portion of the packaging bag.

The vertically long sealing portion a located substantially at the center of the packaging bag is a back seal. Usually, the back seal is formed at the center of the back surface (back side) of the packaging bag. , In the side direction, that is, in the right or left side surface direction. In FIG. 4, b
Indicates a two-layered portion, c indicates a four-layered portion formed of a back seal portion, and d indicates a detailed structure of a portion where a hole (tunnel) may be evident.

The lower seal portion B of the pillow-type packaging bag is formed such that the seal width of the back seal portion a is wider than the seal width of both sides. The entire central portion including the seal portion a is formed by sealing with a seal bar by a conventional method, but it is also possible to appropriately seal only the portion including the back seal portion a in a wide manner.

Regarding the shape of the sealing portion, FIGS.
To be more specific, FIG. 1 shows that the lower end of the packaging bag is formed in a substantially arch shape with the bottom as a base.
FIG. 2 shows a substantially rectangular shape,
Further, FIG. 3 shows that this is formed only in a certain range including only the back seal portion a.

The end sealing of the packaging bag was carried out by a conventional method using a sealing machine equipped with a seal bar driven by an air cylinder driving section at about 180 ° C. for 0.5 second. Each of the seal bars has a sealing surface formed in a shape capable of forming the sealing portion shown in FIGS. 1 to 3, and is formed in a type in which the surface form of the sealing portion is sealed in a solid state. One used.

In the end seal portion formed at the lower portion of the packaging bag, the seal width at the central portion including the back seal portion a is formed wider than the seal width on both sides. (Tunnel) was obtained, and a packaging bag with a low probability of being obtained was obtained.

[0039]

As described above in detail, the present invention provides a pillow-type food filling packaging bag for filling light foods such as snacks at least at the lower end seal portion.
A packaging bag characterized in that a sealing width of a central portion including a back sealing portion of the packaging bag is made wider than a sealing width of both sides, and a sealing bar for forming an end sealing portion of the packaging bag. Conventionally, there is an effect that it is possible to prevent a possibility that a hole (tunnel) is likely to be formed in at least a lower end seal portion of the pillow type food packaging bag, that is, the back seal portion, from increasing in probability.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a food filling packaging bag in which a central sealing portion including a back sealing portion a is formed in a substantially arch shape in a lower end sealing portion of a pillow type packaging bag.

FIG. 2 is an explanatory view of a food filling packaging bag in which a central sealing portion including a back sealing portion a is formed to be substantially rectangular and wide in a lower sealing portion of a pillow type packaging bag.

FIG. 3 is an explanatory diagram of a food filling packaging bag in which only a sealing portion including a back sealing portion a has a partially wider sealing width in a lower end sealing portion of a pillow type packaging bag.

FIG. 4 is an explanatory view of a cross section of a back seal portion in an end seal portion.

[Explanation of symbols]

A Pillow-type packaging bag B End seal part a Back seal part located substantially at the center b Two-ply part c Four-ply part (formed at the back seal part located at the substantially center) d Hole (tunnel) is clear Fearful part

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B65D 30/00-33/38

Claims (2)

(57) [Claims] 1. A pillow-type food filling packaging bag in which at least a lower end seal portion of a pillow-type food filling packaging bag is sealed with a seal bar, wherein the seal bar has an arch-shaped sealing surface. A pillow type characterized in that the seal width of a central portion including a back seal portion located substantially at the center of the back surface of the packaging bag is made wider than the seal width of both sides by using an arched seal bar. Packaging bag for food filling. 2. The arch type seal bar according to claim 1 , wherein at least a lower end seal portion of the pillow type food packaging bag is formed in a substantially arch shape with at least a lower portion of a bottom of the packaging bag. Arch type seal bar used for