JP6930159B2 - Easy-to-out bag and packaging - Google Patents

Description

The present invention is a bag formed by heat-sealing a plastic film, and the contents can be easily poured out and transported by peeling off the weakly sealed portion provided on the bag. The present invention relates to a bag and a package that are difficult to peel off due to the pressure applied to the package, but can be easily peeled off when the weak seal is intentionally peeled off.

Conventionally, it has been widely practiced to distribute a package in which the contents are stored in a bag formed by heat-sealing the peripheral edge of a film having a heat-sealing property, in order to improve the storage stability of the contents. It is contributing. When taking out the contents, it is common to cut off the end of the bag with scissors or tear the bag by hand starting from the notch provided in the peripheral heat seal portion of the bag.

In addition, there is a bag body in which an upper heat-sealing pattern composed of a non-seal portion is provided on the upper part of the bag body and cut out so as to cross the non-seal convex portion to serve as a spout, and the contents are poured out from the non-seal portion (patented). Reference 1).

Such a bag is used as a liquid container in many products such as natto sauce and refill shampoo. However, when the bag is torn to open it, the contents may pop out, the contents may stain your hands, or the contents may come out when you turn the opening downward to pour out the contents. There is a problem that it pollutes the surroundings.

Further, a partition seal portion composed of an easily peelable seal portion is formed by interposing a film having an easily peelable layer (weak seal layer) on the front and back or a single easily peelable film in the region including the partition seal portion between the strong sealable films. However, a packaging bag having a plurality of chambers formed by the partition seal portion has been devised. If a bag body from which the non-pressurized chamber of the bag body is removed is manufactured, the contents can be dispensed by pressing the bag body without tearing the bag body (see Patent Document 2).

However, such a bag has a problem that the peeling portion and the peeling direction of the weak seal portion are not stable, the pouring direction is unknown until the contents come out, and the contents are scattered around. Further, since it has a peripheral seal portion composed of a weak seal portion, there is a risk that the contents may come out from the peripheral seal portion in the worst case depending on the variation in the sealing temperature at the time of bag making.

In addition, the conventional method of opening the partition seal consisting of the weak seal portion is to place the package on a table and crush the bag by hand, or to pinch both sides of the body film near the partition seal portion with both hands. There are two methods of peeling, the former requires preparing a table on which the package is placed in advance. Furthermore, it is often difficult to use outdoors, and it lacks convenience in actual use. The latter has the problem that it is necessary to use both hands and at the same time it is very difficult to peel off if the position of the body film to be pinched with fingers is not optimal. ..

Such a problem can be solved if there is a package body in which the pressurizing storage chamber of the package body can be grasped by hand and the partition seal portion can be peeled off. However, when trying to peel off the partition seal part by grasping it by hand, it is necessary to design the peeling strength of the partition seal part to be considerably low, but there is a risk that the partition seal part will be peeled off due to the vibration of transportation. It has not been implemented because it will increase.

Further, all of the above-mentioned bags are premised on being used by pressing the storage chamber and applying pressure to peel off the partition seal portion, but this means that the bags filled with the contents are flattened. When stacked, packed, and transported, the partition seal is peeled off with almost the same force as the vertical force applied to the bag due to vibration during transportation. If the peeling strength of the partition seal portion is set low in order to facilitate the peeling of the partition seal portion by the user, the peeling seal portion will be peeled off during transportation. On the contrary, if the peeling strength of the partition seal is set high so that the partition seal is difficult to peel during transportation, there is a problem that a large force is required for the user to peel the partition seal. .. In order to provide a package that can peel off the partition seal even if the pressure applied by the user is weak, it is necessary to pack the package one by one and distribute it, which poses a problem of labor and cost. There is.

Japanese Unexamined Patent Publication No. 10-175646 Japanese Unexamined Patent Publication No. 2004-49251

The present invention has been made in consideration of such a point, and the user can easily peel off the weakly sealed portion while having a weakly sealed portion that is difficult to peel off by the pressure applied during transportation. , An object of the present invention is to provide a bag body in which the pouring position and direction of contents can be reliably regulated, and a package body using this bag body.

The present invention has a strong sealing layer on each inner surface, and has a pair of base films laminated on each other and a weak sealing layer interposed between the pair of base films and formed on at least one surface. In a bag body provided with an easily peelable film and including a storage chamber and an openable pouring port region, the easily peelable film covers at least the pouring port area of the bag body and one of the bag bodies. The easily peelable film extends from the edge portion of the film to the other edge portion in a band shape, and the easily peelable film is formed on a pair of a spout region weak seal portion forming the spout region and a pair of both ends of the spout region weak seal portion. The pair of base films have a peripheral strong sealing portion formed on the peripheral edge portion of the bag body, and the peripheral strong sealing portion has a peripheral strong sealing portion, and the peripheral strong sealing portion has a peripheral strong sealing portion, and the pouring outlet region weak sealing portion side. It is a bag body characterized by being provided with a pair of extending additional strong seal portions.

The present invention is a bag body in which each weak seal portion on both sides forms a guide path for guiding the contents to the weak seal portion side of the injection / outlet region together with the additional strong seal portion.

The present invention is a bag body characterized in that the guide path includes an inclined line that guides the contents toward the weakly sealed portion of the spouting port region.

The present invention is a package body including a bag body and contents stored in the bag body.

As described above, according to the present invention, the weakly sealed portion of the spout area can be easily peeled off to reliably open the spout area.

Since the bag body according to the present invention is provided with an additional strong seal portion extending from the peripheral strong seal portion toward the spout area side, it is possible to form a package in which the weak seal portions on both sides are difficult to peel off.

Further, in the bag body according to the present invention, a guide path for guiding the contents to the spout area side can be formed by the facing additional strong seal portion, and a package body in which the contents are hard to scatter during use is formed. can.

Further, since the bag body according to the present invention can regulate the spout area of the contents, the contents can be opened after the spout area is turned downward, and the surroundings are not easily soiled during use. Can be formed.

Further, in the bag body according to the present invention, a virtual circle is drawn in the storage chamber in which the positional relationship between the additional strong seal portion and the weak seal portions on both sides has a diameter of the distance between the peripheral strong seal portions facing each other. When the virtual circle comes into contact with the additional strong seal portion, the virtual circle does not come into contact with the weak seal portions on both sides. When transported, it is possible to form a package in which the weak seal portion in the spout area is hard to peel off even when pressure is applied to the storage chamber of the package stacked in the lower part due to vibration.

Further, in the bag body according to the present invention, the distance between the facing additional strong seal portions is approximately two-thirds or less of the distance between the peripheral strong seal portions of the bag body. As a result, when the package is flat, the weakly sealed portion in the spout area is difficult to peel off, but by making the storage chamber of the package cylindrical and pressurizing it, that is, by grasping the storage chamber by hand and pressurizing it. , The weak seal part in the spout area can be easily peeled off.

Further, in the package according to the present invention, the weakly sealed portion in the spout area can be easily peeled off by holding the storage chamber by hand and applying pressure, so that a stand is not required to apply pressure to the storage chamber. Therefore, it is very convenient because the weakly sealed portion of the spout area can be peeled off while holding it in the hand and usually with one hand.

Further, since the easily peelable film can be continuously supplied together with the base film to form a bag body without cutting off, it does not require a special bag making machine or packaging machine and is easy to carry out.

FIG. 1 is a schematic plan view illustrating a bag body in the description of the related technology. FIG. 2A is a schematic plan view illustrating the embodiment (a) of the bag body according to the present invention. FIG. 2B is a schematic plan view illustrating the embodiment (b) of the bag body according to the present invention. FIG. 2C is a schematic plan view illustrating the embodiment (c) of the bag body according to the present invention. FIG. 3A is a cross-sectional view taken along the line segment XX'of FIG. 2A, and FIG. 3B is a cross-sectional view taken along the line segment YY'of FIG. 2A. FIG. 4 is a schematic plan view illustrating the package according to the present invention. FIG. 5 is a schematic plan view showing another example of the bag body according to the present invention. FIG. 6 is a schematic plan view showing a comparative example with the bag body according to the present invention.

<Explanation of related technologies>
First, in order to better understand the embodiments of the present invention, the related techniques of the embodiments will be described.

In the following description, the weak seal property means that when the heat-sealed portion is peeled off, cohesive peeling, interfacial peeling, delamination, etc. occur stably, that is, the heat-sealed portion is easily peeled off by a human hand. It refers to the heat-sealing property that indicates the heat-sealing strength that can be achieved. On the other hand, the strong sealing property means the heat sealing property that indicates the heat sealing strength that the human cannot easily peel off the heat sealing part by hand, and the heat sealing strength that the human can easily peel off the heat sealing part by hand. Even if it is, it refers to the heat-sealing property in which the heat-sealing property layer is broken at the time of peeling.

As shown in FIG. 1, the bag body 1'includes a pair of base films 8 and 8 having a strong sealing layer on the inner surface and superposed on each other.

Further, the pair of base film films 8 and 8 have peripheral strong sealing portions 6 and 6 formed by heat sealing and an upper strong sealing portion 7.

An opening 11 is formed at the lower end of the bag body 1'.

Further, as shown in FIG. 1, notches 7a and 7a are provided on both sides of the upper strong seal portion 7, and a non-seal region 13 is formed in the upper strong seal portion 7. Then, at the time of use, the bag body 1'is torn so as to cross the unsealed region 13 from the notches 7a and 7a. As a result, the contents are poured out from the opening of the unsealed region 13.

Such a bag body 1'is used for a refill shampoo package, a natto dripping pouch, and the like by devising the bag body shape, the seal shape, and the like. However, in the bag body 1'shown in FIG. 1, the method of disposing of the bag body 1'section after tearing the bag body 1', the contents come out when the bag body is torn, and the hands and the surroundings are soiled. There are problems such as the contents spilling and soiling the hands and surroundings when the bag is turned upside down to take out the contents.

<First Embodiment>
Next, the first embodiment of the present invention will be described with reference to FIGS. 2A and 3A and 3B. The first embodiment has a configuration for solving the problems of the related technology described above.

As shown in FIGS. 2A and 3A and 3B, the bag body 1 according to the embodiment (a) has a strong sealing layer 8a on its inner surface, and is a pair of base materials composed of a plurality of layers overlapped with each other. Easy peeling property having a weak seal layer 9a formed on one surface and a strong seal layer 9b formed on the other surface, which are interposed between the films (laminated films) 8 and 8 and the base films 8 and 8. It includes a film 9 and includes a storage chamber 20 and an openable spout area 3A. Here, the easily peelable film refers to a single-layer or multi-layer single film having a weak seal layer on one surface and a strong seal layer or a weak seal layer on the other surface.

Of these, the easily peelable film 9 covers at least the spout region 3A and extends in a band shape from one edge of the bag 1 to the other edge. The easily peelable film 9 has a spout region weak seal portion 3 formed by heat sealing to form the spout region 3A, and a pair of both side weak seal portions formed by heat sealing at both ends of the spout region weak seal portion 3. It has 5 and 5. Further, the pair of base film 8 and 8 have peripheral strong sealing portions 6 and 6 formed by heat sealing on the storage chamber 20 side of the easily peelable film 9 in the bag body 1. Further, of the pair of base film 8 and 8, an upper strong seal portion 7 formed by heat sealing is formed on the side opposite to the storage chamber 20 of the easily peelable film 9, and is formed on both side edges of the upper strong seal portion 7. Is provided with a pair of notches 7a and 7a.

An opening 11 is formed at the lower end of the bag body 1.

Further, the upper strong seal portion 7 and the easily peelable film 9 are provided with a non-seal region 13 in the vicinity of the spout region weak seal portion 3.

Further, as shown in FIG. 2A, the peripheral strong seal portions 6 and 6 on the storage chamber 20 side project toward the spout area weak seal portion 3 side to protect the side weak seal portions 5 from the contents in the storage chamber 20. The additional strong seal portions 4 and 4 are connected. The additional strong seal portions 4 and 4 project from the peripheral strong seal portions 6 and 6 toward the spout area weak seal portion 3 and are connected to the both side weak seal portions 5, and the additional strong seal portions 4 and 4 and the both side weak seal portions 5 A guide path 15 for guiding the content M (see FIG. 4) in the bag body 1 to the side of the weak seal portion 3 in the spout area is formed. The guide path 15 is formed by the additional strong seal portions 4 and 4 and the weak seal portions 5 on both sides, and includes an inclined line 15a for guiding the content M.

As described above, the easily peelable film 9 has a weak seal layer 9a formed on one surface and a strong seal layer 9b formed on the other surface. Therefore, the spout region weak seal portion 3 includes a weak seal portion 30 formed by heat-sealing the strong seal layer 8a of the base film 8 and the weak seal layer 9a of the easily peelable film 9, and the base film. The strong seal layer 8a of 8 and the strong seal portion 40 formed by heat-sealing the strong seal layer 9b of the easily peelable film 9 are included. When the weak seal portion 3 in the spout area is peeled off due to this, the weak seal portion 3 is peeled off mainly through the weak seal portion 30 (see FIG. 3A).

Further, the weak seal portions 5 and 5 on both sides are the weak seal portion 30 formed by heat-sealing the strong seal layer 8a of the base film 8 and the weak seal layer 9a of the easily peelable film 9, and the base film 8. The strong seal layer 8a and the strong seal portion 40 formed by heat-sealing the strong seal layer 9b of the easily peelable film 9 are included.

Further, the peripheral strong seal portions 6 and 6 include a strong seal portion 40 formed by heat-sealing the strong seal layers 8a and 8a of the base film 8 and 8 with each other.

2A, 2B, and 2C are schematic plan views illustrating embodiments (a) to (c) of the bag body according to the present invention.

In FIG. 2A, a non-seal region 13 is formed in the vicinity of the spout region weak seal portion 3 in the upper strong seal portion 7 and the easily peelable film 9. Then, when the bag body 1 is torn from the notch 7a and opened, the unsealed region 13 opens. Then, when the content M in the storage chamber 20 is pressurized, the pressurized content M is guided from the guide path 15 to the spout area weak seal portion 3 side and peels off the spout region weak seal portion 3. .. As a result, the spout region 3A is formed in the bag body 1, and the content A is discharged outward from the spout region 3A and the unsealed region 13.

As shown in FIG. 3 (a), in the easily peelable film 9 of the bag body shown by XX'in FIG. 2A, the weak seal portion 30 and the strong seal portion are shown in the cross section of the spout region weak seal portion 3. Although there is 40, it is the weak seal portion 30 that actually functions and the contents pass through. Further, as shown in FIG. 3B, in the cross section of the portion where the additional strong sealing portion 4 of the bag body 1 shown by YY'in FIG. 2A is provided, the easily peelable film 9 is the additional strong sealing portion 4 And the upper strong seal portion 7 of the bag body 1.

Next, the bag body 1 according to the embodiment (b) will be described with reference to FIG. 2B. A strip-shaped easily peelable film 9 is inserted between the pair of base film 8 and 8. The easily peelable film 9 forms a weak seal portion 3 in the spout region and weak seal portions 5 and 5 on both sides located on both sides of the weak seal portion 3 in the spout region. A pair of additional strong seal portions 4 extending from the peripheral strong seal portions 6 and 6 toward the spout area weak seal portion 3 side are provided, and an inclined line is provided by the side weak seal portions 5 and 5 and the additional strong seal portions 4 and 4. A guide path 15 including 15a is formed.

In FIG. 2B, the package body 12 formed by filling the bag body 1 with the content M and sealing the bag body 1 is weakly sealed in the spout area by grasping and pressing the bag body 1 without tearing the bag body 1. The part 3 is peeled off to form the spout region 3A, and the content M can be poured out from the spout region 3A. If it is desired to further limit the position where the content M comes out, the width of the unsealed guide path 15 may be designed to be narrower.

FIG. 2C shows a bag body 1 having a tapered piping bag shape according to the embodiment (c). As shown in FIG. 2C, the easily peelable film 9 forms the spout region weak seal portion 3 and the side weak seal portions 5 and 5 located on both sides of the spout region weak seal portion 3. A pair of additional strong seal portions 4 extending from the peripheral strong seal portions 6 and 6 toward the spout area weak seal portion 3 side are provided, and an inclined line is provided by the side weak seal portions 5 and 5 and the additional strong seal portions 4 and 4. A guide path 15 including 15a is formed.

In FIG. 2C, since the bag body 1 has the guide path 15, the contents in the storage chamber 20 stably guide the bag body 1 from the guide path 15 to the spout area weak seal portion 3, and the spout area weak seal portion 3 is peeled off. As a result, the spout area 3A is formed so that the contents can be squeezed out.

Further, since the bag body 1 is not provided with the strong seal portion in the vicinity of the weak seal portion 3 in the spout area, the bag body 1 can be used as it is without tearing the bag body when the package body 12 is used.

<Explanation of each component>
Next, each component in each of the above embodiments will be described.

(Additional strong seal part 4)
In the bag body 1 according to the present invention, the additional strong seal portion 4 protrudes from the peripheral strong seal portion 6 at a position away from the easily peelable film 9 on the storage chamber 20 side toward the spout area weak seal portion 3 side. A guide path 15 is formed together with the spout area weak seal portion 3. In this case, since the contents are unlikely to leak from the weakly sealed portions 5 on both sides, which are the weakly sealed portions, the length of the additional strong sealing portion protruding from the peripheral strong sealing portion 6 does not need to be specified. By intentionally shortening the length of the additional strong seal portion 4, the weak seal portion 3 in the spout area can be easily peeled off during use, or conversely, by intentionally lengthening the length, the weak seal portion 3 in the spout area during distribution can be easily peeled off. May not be peeled off. Further, if the design is made in consideration of the balance between the distance between the peripheral strong seal portions 6 of the bag body 1, the peel strength of the spout area weak seal portion 3, the ease of peeling of the spout region weak seal portion 3 during use, and the like. good.

(Base films 8, 8)
The base film 8 and 8 forming the bag body according to the present invention are made of at least a laminated film in which a base material and a heat-sealing film are laminated, and if necessary, an intermediate layer is formed between the base material and the heat-sealing film. May be provided.

As the base material, a biaxially stretched film having excellent physical strength and heat resistance, such as polyethylene terephthalate, polyethylene buoyate, polyamide, polypropylene, and polyethylene, which are generally used for food packaging materials, and these A film obtained by depositing a metal oxide or metal on the film, applying an oxygen barrier coating, or providing an easily adhesive layer can be used.

As the heat-sealing film, a general heat-sealing film that is softened by heating and heat-sealed by applying pressure can be used, and polyethylene, polypropylene, polyester, polyacrylonitrile, cyclic olefin copolymer, and acid modification can be used. There are unstretched films such as polyolefin, ethylene / vinyl acetate copolymer, and ionomer, which may be used properly according to the application.

As the intermediate layer, in addition to the film used for the above-mentioned base material, a metal foil, an ethylene / vinyl alcohol copolymer, a light-shielding film or the like can be used as a single layer or a plurality of layers depending on the application.

Further, the method of laminating the films in the base films 8 and 8 used for the bag body 1 according to the present invention is not particularly limited, and is a usual film laminating method such as dry lamination, non-sol lamination, and extrusion of molten resin. Lamination or the like can be used.

In addition, characters and patterns can be printed on the bag body 1 according to the present invention, and usually the base material is printed by gravure printing, flexographic printing, or the like.

(Easy-to-peel film 9)
The easily peelable film 9 used for the bag body according to the present invention has a weak seal layer 9a having a weak seal property against the heat seal surface of the laminated film formed on at least one surface thereof, and is a single film, a coextruded film, or a coextruded film. , Consists of any of the laminated films.

The peeling method of the weak seal layer 9a of the easily peelable film 9 includes cohesive fracture, delamination, and interfacial peeling, but any method may be used.

For example, a large number of co-extrudable easily peelable films 9 are commercially available from many film manufacturers, and when the heat-sealed surface of the base film 8 is polyethylene, one surface is made of polyethylene and the other surface is made of polyethylene. An easily peelable film 9 having a weak sealing property is used. If the heat-sealing surface of the base film 8 is polypropylene, one surface is made of polypropylene, and the easily peelable film 9 having a weak sealing property against polypropylene is used.

(Bag body 1)
The form of the bag body 1 used in the present invention is a flat bag, a stand pack, a bottom gusset bag, a pillow bag, or the like, in which a strip-shaped easily peelable film is continuously formed in synchronization with a laminated film in a bag making machine for the bag. A form that can be manufactured by a bag making machine that can supply can be used.

Further, if a strip-shaped easily peelable film 9 supply device is attached, it can be manufactured by a filling and packaging machine that fills and seals the contents while forming a bag body.

(Shape of additional strong seal part)
The additional strong seal portion 4 provided on the bag body 1 used in the present invention is most transported when the content side seal edge is perpendicular to the peripheral strong seal portion 6 as in the bag body shown in FIG. In addition, it has a great effect of making it difficult for the weak seal part for opening the contents to peel off. However, as shown in FIG. 2C, even if the content-side seal edge of the additional strong seal portion 4 is slanted with respect to the peripheral strong seal portion 6, the weak seal portion for opening the contents is peeled off during transportation as compared with the conventional bag body. You can get the effect of making it difficult.

(Outlet area weak seal part 3)
The shape of the spout region weak seal portion 3 provided in the bag body 1 used in the present invention may be any shape such as a straight line, an arc, and a corrugation, but the seal width, the weight and fluidity of the contents, and the outer box may be used. It is sufficient to design a product that is easy to peel off during use and difficult to peel off during transportation, taking into consideration conditions such as the presence or absence of.

(Shape of spout area 3A)
In the bag body 1 used in the present invention, the outlet of the content M can be regulated by the presence of the additional strong sealing portion 4, so that the content composed of the unsealed portion 13 before and after the pouring outlet region weak sealing portion 3. It can be used as a spout by providing a flow path of.

The spout is composed of a region sandwiched by the spout region weak seal portion 3 or the additional strong seal portion 4, and the inside of the bag body 1 from the spout region weak seal portion 3 is added in the vicinity of the easily peelable film 9. By providing the extension portion of the strong seal portion 4, it becomes difficult to peel off during transportation.

Further, since the pressure of the contents is not applied to the portion outside the weakly sealed portion 3 in the spout area, even if the unsealed portion 13 is provided on the easily peelable film 9, the possibility of peeling before use is low. When it is necessary to narrow the flow path of the contents, or when the fluidity of the contents is low, the additional strong sealing portion 4 is provided. When the spout is provided outside the weak seal portion 3 of the spout area, if it is necessary to prevent foreign matter from entering the spout, the tip of the spout is sealed and the bag body is torn and removed during use. You can do it.

(Packaging body)
FIG. 4 is a schematic plan view illustrating the package 12 according to the present invention. The packaging body 12 has a bag body 1 and a content M filled in the bag body 1.

In the case of the package 12 according to the present invention, in order to prevent the weak seal portion 3 in the spout area from peeling off during transportation, the protruding length of the additional strong seal portion 4 is increased to increase the protrusion length between the additional strong seal portions 4. Shorten the distance. In this case, like the packaging body 12 using the bag body 1 having the conventional spout area weak seal portion 3, the packaging body 12 is placed on a table or the like, the palm is placed in the storage chamber 20, and the palm is placed on the palm. In the method of applying pressure so as to put a weight on it, it becomes difficult to peel off the weak seal portion 3 in the spout area.

However, even in such a case, the pressure is concentrated between the additional strong seal portions 4 by directing the direction of compressing the bag 1 from one peripheral strong seal portion 6 to the opposite peripheral strong seal portion 6. The effect that the weakly sealed portion in the spout area is easily peeled off can be obtained.

In other words, assuming that the compression direction when the bag body 1 shown in FIG. 1 is used is the vertical direction, if it is difficult to peel off the spout region weak seal portion 3 by vertical compression in the bag body 1 according to the present invention, the peripheral edge Compress in the horizontal direction between the strong seal portions 6. As a result, pressure is concentrated between the additional strong seal portions 4, and the weak seal portion 3 in the spout region is easily peeled off.

That is, in the case of a packaging body 12 having a width of only a few centimeters, for example, a bag of sauce attached to individual edible natto, the left and right peripheral strong seal portions of the storage chamber 20 Place your thumb and forefinger on 6 and pick them so that the bag 1 is sandwiched between them, and apply force so that the seal edges inside the bag 1 of the left and right peripheral strong seals 6 come close to each other to the contents in the pressurizing chamber 20. Apply pressure. As a result, if the width of the pressurizing chamber 20 is too large to be picked up by fingers, one hand can use one hand to hold the seal edges inside the bag 1 of the left and right peripheral strong sealing portions 6 of the pressurizing chamber 20. Grip it closer. Alternatively, when the bag body 1 is further large, the package body 12 is crushed by bringing the seal edges inside the bag body 1 of the left and right peripheral edge strong seal portions 6 of the pressurizing chamber 20 close to each other with both hands. In this way, the swelling of the package 12 at the location where the additional strong seal portion 4 is provided is suppressed, the pressure between the additional strong seals 20 increases, and the content side of the spout region weak seal portion 3 easily expands. As a result, the weak seal portion 3 in the spout area can be easily peeled off.

When pressure is applied to the pressurizing chamber 20 by placing it on a table as in the prior art, the pressure applied to the entire peripheral strong seal portion 6 of the pressurizing chamber 20 is dispersed. In the opening method of No. 12, since there is little escape of pressure in the lateral direction and the pressure is concentrated in the vertical direction, the finger force, grip strength, and arm strength required to peel off the weak seal portion 3 in the spout area are not so much required. ..

In the bag body 1'without the additional strong seal portion 4 shown in FIG. 1, when the weak seal portion 3 in the spout area is to be peeled off by the method of compressing the bag body 1 in the lateral direction, the weak seal portion 3 in the spout area is used. The peeled part is difficult to stabilize. Further, since the peripheral weak seal portion 5 may be peeled off, the method of peeling the spout area weak seal portion 3 by picking or grasping the bag body 1'shown in FIG. 1 is dangerous. Was accompanied.

Next, specific examples and comparative examples of the present invention will be described.

(Manufacturing of laminated film)
Biaxially stretched polyethylene terephthalate film with a thickness of 12 μm (product name “E5102”, manufactured by Toyobo Co., Ltd.), biaxially stretched polyamide film with a thickness of 15 μm (product name “N1202”, manufactured by Toyobo Co., Ltd.), thickness 40 μm An unstretched polyethylene film (product name "L4102", manufactured by Toyobo Co., Ltd.) was bonded in this order using a two-component curable urethane adhesive to obtain a laminated film A.

(Manufacturing of bag body)
The laminated film A is set in a bag making machine for flat bags capable of producing a self-supporting bag, and a strip-shaped easily peelable film having a thickness of 30 μm slit to a width of 30 mm (product name “7601ED”, Toray Film Processing Co., Ltd.) Was set in the bottom material supply section of the self-standing bag, and the easily peelable film was supplied to the bag making machine together with the laminated film A without being folded in half. Further, a horizontal seal portion having a width of 20 mm is provided at intervals of 140 mm, a vertical seal portion having a width of 10 mm is provided on the strip-shaped easily peelable film 9, and then a decorative cut having a length of 180 mm in the horizontal direction is applied to the center of the horizontal seal portion. The bag body 1 shown in FIG. 4 having a width of 140 mm and a length of 180 mm was obtained by cutting to form a side seal portion having a width of 10 mm. The easily peelable film 9 of the bag body 1 is located 5 mm to 35 mm below the upper end of the bag body, and the vertical seal portion corresponding to the weak seal portion 3 in the spout area is located 20 mm to 30 mm below the upper end of the bag body. It is in.

Further, as a result of measuring the peel strength of the weak seal portion 3 in the spout region, the peel strength was 3.4 N / 15 mm, which was considerably low.

The easily peelable film 9 is a co-extruded film that exhibits easy peelability with respect to polyethylene, and since the opposite surface of the weakly sealed surface is a polyethylene surface, the heat seal is performed while being sandwiched between the laminated films A. When applied, one side exhibits weak sealing properties and the other side exhibits strong sealing properties.

A heat sealer having a seal width of 20 mm is used on the bag body 1 at a position 20 mm to 40 mm below the upper end of the bag body 1 in a direction perpendicular to the side seal portion of the bag body, and the peripheral strengths of both sides thereof. An additional strong seal portion 4 having a width of 5 mm was evenly provided in 10 mm increments so that the protrusion length from the seal portion 6 was 10 mm to 40 mm on one side. At the same time, a weak seal portion 5 on both sides having the same length as the additional strong seal portion 4 is provided between the additional strong seal portion 4 and the spout area weak seal portion 3, and the same as the bag body 1 shown in FIG. Four kinds of such bags were obtained.

(Manufacturing of packaging)
Four types of bags provided with the additional strong seal portion 4 and a bag body without the additional strong seal portion 4 as a comparative example are filled with 200 ml of water, and the lower end of the bag 1 is sealed with a heat seal having a width of 10 mm. Then, the packaging body 12 according to the present invention and the packaging body 12 of the comparative example were obtained.

(Compression test)
The package 12 is sandwiched between acrylic resin plates having a width of 150 mm, a length of 200 mm, and a thickness of 10 mm, compressed at a speed of 100 mm / min using a tensile tester, and until the weak seal for opening the contents is peeled off and the bag is broken. The maximum load of was measured.

In the measurement, a compression jig having a diameter of 100 mm is used, and the package is stored in a polyethylene bag with a chuck having a width of 250 mm, a length of 320 mm, and a thickness of 40 μm in a degassed state as much as possible, and then placed on the package 12. Adjust the position of the package 12 so that the acrylic resin plate is horizontal with the acrylic resin plate laid under the package 12, and pull the test so that the compression jig compresses the center of the acrylic resin plate. The sample position on the machine was adjusted and a compression test was conducted.

Table 1 shows the average value measured for 5 bags for each category.

From the results shown in Table 1, when the total protruding length of the additional strong seals on both sides exceeds one-third of the inner dimension (120 mm) in the width direction of the bag 1 (more than 20 mm on one side), the package 12 The load required to break the bag is increasing.

(Opening test)
A test was conducted in which the pressurizing chamber 20 of the four types of packaging 12 produced by the bag 1 provided with the additional strong sealing portion 4 was grasped with one hand and opened.

As a result, the weak seal portion 3 in the spout area could be easily peeled off from any of the packages 12. In the package 12 having a large protrusion length of the additional strong seal portion 4, the peeling range of the weak seal portion 3 in the injection / outlet region is limited, so that the contents are less likely to scatter when the bag is broken.

(Manufacturing of bag body)
The bag was made using the laminated film A, the same bag making machine and the easily peelable film as in Example 1, but the position of the vertical sealing portion corresponding to the weak sealing portion 3 in the spout area was set at the upper end of the bag body. It was set to 15 mm to 25 mm below, and 5 mm above the bag body of Example 1.

The laminated film A is set in the same bag making machine as in Example 1, and the same strip-shaped easily peelable film 9 as in Example 1 slit to a width of 25 mm is set in the bottom material supply portion of the self-standing bag. The strip-shaped easily peelable film 9 was supplied to the bag making machine together with the laminated film A without being folded in half, and horizontal seal portions having a width of 20 mm were provided at intervals of 70 mm. Further, after providing the strip-shaped easily peelable film 9 with a vertical sealing portion having a width of 10 mm, a decorative cutting having a length of 140 mm in the horizontal direction is applied, and the strip-shaped easily peelable film 9 is cut at the center of the horizontal sealing portion to form a peripheral strong sealing portion 6 having a width of 10 mm. Then, a bag body of Comparative Example shown in FIG. 6 having a width of 70 mm and a length of 140 mm was obtained. The easily peelable film 9 of the bag body 1 is located 5 mm to 30 mm below the upper end of the bag body 1, and the vertical seal portion corresponding to the weak seal portion for opening the contents is 15 mm to 25 mm below the upper end of the bag body. In position.

Using a heat sealer having a seal width of 20 mm, the bag body 1 is heat-sealed so that an unsealed portion 13 having a width of 20 mm is formed at a position up to 30 mm from the upper end of the bag body 1 to weaken the spout area. The seal portion 3 was formed. An additional strong seal portion 4 having an angle of 45 degrees was projected from the peripheral strong seal portion 6 at the lower end of the weak seal portion 3 in the spout area to obtain a bag body of Example 2 according to the present invention as shown in FIG.

(Manufacturing of packaging)
The bag body of Example 2 and the bag body of Comparative Example were filled with 30 ml of water, and 20 bags each of the package 12 sealed by heat-sealing the opening 11 were produced.

(Opening test)
As a result of conducting a test of pouring out the contents by grasping the package 12 with one hand, all the packages of Example 2 have the contents discharged from the injection port at the upper end of the bag body, and the direction in which the contents are discharged is also the injection port. It was a very easy-to-use package because it came out straight in the direction of.

Further, the packaging body 12 of the comparative example was not practical because the contents of two bags came out from the weakly sealed portion of the side sealing portion.

1 Bag body 3 Outlet area weak seal part 3A Inlet area 4 Additional strong seal part 5 Both sides weak seal part 6 Peripheral strong seal part 7 Upper strong seal part 8 Base film 8a Strong seal layer 9 Easy peeling film 9a Weak seal Layer 9b Strong seal layer 11 Opening 12 Package 13 Non-seal area 30 Weak seal part 40 Strong seal part M Contents

Claims (5)

A pair of base films having a strong sealing layer on the inner surface of each and superposed on each other,
In a bag body comprising an easily peelable film having a weak seal layer formed on at least one surface thereof, which is interposed between the pair of base films, and includes a storage chamber and an openable spout area.
The easily peelable film covers at least the spout area of the bag body and extends in a band shape from one edge portion of the bag body to the other edge portion.
The easily peelable film has a spout region weak seal portion forming the spout region and a pair of both side weak seal portions formed at both ends of the spout region weak seal portion, and also has a pair of weak seal portions on both sides.
The pair of base film has a peripheral strong sealing portion formed on the peripheral edge of the bag body, and has a peripheral strong sealing portion.
The peripheral strong sealed portion, setting a pair of additional strong seal portion which extends into the spout region weak seal portion side,
On the outside of the easily peelable film with respect to the storage chamber, an upper strong seal portion extending in parallel with the easily peelable film is formed, and among the easily peelable film and the upper strong seal portion, the injection outlet region is weak. A bag body characterized in that a non-seal region is formed on an outer portion of the sealed portion with respect to the storage chamber. The bag according to claim 1, wherein a pair of notches are provided on both sides of the upper strong seal portion on a straight line crossing the non-seal region. The bag according to claim 1 or 2, wherein each of the weakly sealed portions on both sides forms a guide path for guiding the contents to the weakly sealed portion of the injection port region together with the additional strong sealing portion. The bag according to claim 3 , wherein the guide path includes an inclined line that guides the contents toward the weakly sealed portion of the spout area. The bag according to any one of claims 1 to 4 and
A package including the contents stored in the bag.

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