JP2018154378A - Easily pouring bag and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To peel a weak sealed part at a pouring outlet region and effectively protect a both sides weak sealed part when applying pressure on a storage chamber.SOLUTION: A bag 1 includes a pair of base material films 8 and 8, and a striped easily releasable film 9 interposed between the pair of the base material films 8 and 8. The easily releasable film 9 has a weak sealed part 3 at a pouring outlet region, and a pair of a both sides weak sealed portion 5 formed at both end parts of the weak sealed part at the pouring outlet region. An additional strong sealed part 4 extending to a side of the weak sealed part 3 at a pouring outlet region for protecting both sides weak sealed portion 5 is formed at a peripheral edge strong sealed part 6 on a side of the storage chamber 20.SELECTED DRAWING: Figure 2A

Description

  The present invention is a bag formed by heat-sealing a plastic film, and the contents can be easily poured out by peeling off the weak seal provided on the bag. The present invention relates to a bag and a package that can be easily peeled off when the weak seal part is intentionally peeled off, although the weak seal part is hardly peeled off at a pressure that is sometimes received by the package.

  Conventionally, it has been widely used to circulate a package containing the contents in a bag formed by heat-sealing the peripheral edge of a film having heat-sealability, thereby improving the contents preservability. Has contributed. When taking out the contents, it is common to cut off the end of the bag body with a scissors or to tear the bag body by hand starting from a notch provided in the peripheral heat seal portion of the bag body.

  Also, there is a bag body in which an upper heat seal pattern composed of a non-seal part is provided on the top of the bag body, cut out so as to cross the non-seal convex part and used as a spout, and the contents are poured out from the non-seal part (patent) Reference 1).

  Such a bag body is used as a liquid container in many products such as natto sauce and shampoo for refilling. However, the contents pop out when the bag is torn for opening, the hands get dirty with the contents, or the contents come out when the opening is turned down to pour out the contents There is a problem of getting dirty around.

  Moreover, the partition seal part which consists of an easily peelable seal part is formed by interposing the film which has the easy peel layer (weak seal layer) on the front and back, or the easy peel film simple substance in the area including the partition seal part between the strong seal 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 such a non-pressurizing chamber of the bag body is removed is manufactured, the contents can be poured out by pressing the bag body without tearing the bag body (see Patent Document 2).

  However, such a bag body has a problem that the peeling portion and the peeling direction of the weak seal portion are not stable, and the pouring direction is unknown until the contents come out, and the contents are scattered around. Moreover, since it has the peripheral seal part which consists of a weak seal part, depending on the dispersion | variation in the seal temperature at the time of bag making, in the worst case, there exists a danger that the content may come out from a peripheral seal part.

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

  Such a problem can be solved if there is a packaging body that can hold the pressurizing storage chamber of the packaging body and peel the partition seal portion. However, when trying to peel off the partition seal part by grasping with a hand, it is necessary to design the peel strength of the partition seal part to be quite low, but there is a risk that the partition seal part will peel off due to transportation vibration. Because it increases, it cannot be implemented.

  Furthermore, any of the above-mentioned bags is assumed to be used by pressing the storage chamber and applying pressure to peel off the partition seal portion. This is because the bags filled with the contents are flattened. When stacked, packed, and transported, the partition seal portion is peeled off with substantially the same force as the vertical force applied to the bag body by vibration during transportation. If the peel strength of the partition seal portion is set low so that the user can easily peel off the partition seal portion, the peel seal portion is peeled off during transportation. On the contrary, if the separation seal portion is set to a high peel strength so that the partition seal portion is difficult to peel off during transportation, there is a problem that the user needs a large force to peel off the partition seal portion. . In order to provide a package that can peel off the partition seal portion even if the pressure applied by the user is weak, it is necessary to circulate the package in a single bag, which is troublesome and costly. Yes.

Japanese Patent Laid-Open No. 10-175646 JP 2004-42951 A

  The present invention has been made in consideration of such points, and the user can easily peel off the weak seal part while having the weak seal part that is difficult to peel off under pressure applied during transportation, and An object of the present invention is to provide a bag body that can reliably regulate the pouring position and direction of contents, and a package body using the bag body.

  The present invention has a strong seal layer on each inner surface, and has a pair of base films laminated to each other, and a weak seal layer formed on at least one surface interposed between the pair of base films. A bag body including an easily peelable film, and including a storage chamber and an openable spout region, wherein the easily peelable film covers at least the spout region of the bag, and one of the bags The easy-peelable film extends in a band from the edge of the spout to the other edge, the spout area weak seal part that forms the spout area, and a pair of ends formed at both ends of the spout area weak seal part The pair of base film has a strong peripheral edge sealing portion formed on the peripheral edge of the bag body, and the peripheral edge strong sealing portion toward the outlet region weak sealing portion side. A pair of additional strengths that extend A bag body which is characterized in that a Lumpur portion.

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

  The present invention is the bag, wherein the guide path includes an inclined line that guides the contents to the spout region weak seal portion side.

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

  As described above, according to the present invention, the spout region can be easily opened by peeling the spout region weak seal part easily.

  Since the bag which concerns on this invention provided the additional strong seal part extended from a peripheral strong seal part to the spout area | region side, it can form the package body from which a weak seal part on both sides is hard to peel.

  In addition, the bag according to the present invention can form a guide for guiding the contents to the spout region side by the opposed additional strong seal portion, and forms a package in which the contents are not easily scattered during use. it can.

  Moreover, since the bag body which concerns on this invention can regulate the spout area | region of a content, it can open | release a content after turning a spout area | region downward, and is a packaging body which does not pollute the circumference | surroundings at the time of use Can be formed.

  Further, in the bag according to the present invention, the positional relationship between the additional strong seal portion and the weak seal portions on both sides is drawn in a virtual circle whose diameter is the distance between the opposing peripheral strong seal portions, When the virtual circle is in contact with the additional strong seal portion, the virtual circle is in a positional relationship that does not contact the weak seal portions on both sides, so the packaging bag filled with the contents in the bag body is stacked and packed, When transported, it is possible to form a package body in which the spout region weak seal portion is not easily peeled off even if pressure is applied to the storage chamber of the package body stacked on the lower side due to vibration.

  In the bag according to the present invention, the distance between the additional strong seal portions facing each other is approximately two-thirds or less of the distance between the peripheral strong seal portions of the bag body. This makes it difficult for the spout region weak seal part to peel off when the package is flat, but by pressurizing the package storage chamber in a cylindrical shape, that is, by holding and pressing the storage chamber by hand. The spout region weak seal portion can be easily peeled off.

  Further, the packaging body according to the present invention can easily peel the spout region weak seal part by gripping the storage chamber with a hand and pressurizing it, so that a stand for placing pressure on the storage chamber is unnecessary. Therefore, the spout area weak seal portion can be peeled off with one hand and usually with one hand, which is excellent in convenience.

  Moreover, since it can supply continuously with a base film without cutting off an easily peelable film and a bag body can be formed, a special bag making machine and a packaging machine are not required, and implementation is easy.

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

<Description of related technologies>
First, in order to better understand the embodiment of the present invention, a related technique of the present embodiment will be described.

  In the following description, the weak sealing property means that cohesive peeling, interfacial peeling, delamination, etc. occur stably when the heat seal part is peeled off, that is, the heat seal part is easily peeled by a human hand. It refers to heat sealability that indicates heat seal strength that can be. On the other hand, the strong sealability is a heat seal property indicating heat seal strength that cannot be easily peeled by a human hand, and heat seal strength that allows a human to easily peel a heat seal portion. Even so, the heat-sealability that the heat-sealable layer breaks at the time of peeling.

  As shown in FIG. 1, the bag body 1 ′ includes a pair of substrate films 8, 8 that have a strong sealing layer on the inner surface and are overlapped with each other.

  The pair of substrate films 8 and 8 have peripheral strong seal portions 6 and 6 formed by heat sealing and an upper strong seal portion 7.

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

  Further, as shown in FIG. 1, notches 7 a and 7 a 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. In use, the bag 1 'is torn from the notches 7a, 7a so as to cross the non-sealed region 13. As a result, the contents are poured out from the opening of the non-sealed region 13.

  Such a bag 1 'is used for a package of a refill shampoo by devising a bag shape, a seal shape or the like, or a sachet for natto. However, in the bag 1 ′ shown in FIG. 1, the disposal method of the section of the bag 1 ′ after tearing the bag 1 ′, the contents come out when the bag is torn, and the hands and surroundings are soiled. There is a problem that the contents spill out and dirty hands and surroundings when the bag body is changed upside down in order to take out the contents.

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

  As shown in FIG. 2A and FIGS. 3A and 3B, the bag 1 according to the embodiment (a) has a pair of base materials each having a strong seal layer 8a on each inner surface and superposed on each other. Easy peelability having films (laminated films) 8 and 8 and a base material film 8 and 8 having a weak seal layer 9a formed on one surface and a strong seal layer 9b formed on the other surface. It includes a film 9 and includes a storage chamber 20 and an openable spout region 3A. Here, the easily peelable film refers to a single layer or a single layer film having a weak seal layer on one surface and a strong seal layer or a weak seal layer on the other surface.

  Among these, the easily peelable film 9 covers at least the spout region 3 </ b> A and extends in a belt shape from one edge of the bag body 1 to the other edge. The easily peelable film 9 is formed by heat sealing and forms a spout region 3A. The spout region weak seal portion 3 and a pair of both side weak seal portions formed by heat sealing at both ends of the spout region weak seal portion 3 5 and 5. Moreover, a pair of base film 8 and 8 has the peripheral strong seal parts 6 and 6 formed in the storage chamber 20 side of the easily peelable film 9 among the bag bodies 1 by the heat seal. Moreover, the upper strong seal part 7 formed by heat sealing is formed in the opposite side to the storage chamber 20 of the easily peelable film 9 among a pair of base film 8, 8, and the both sides edge of the upper strong seal part 7 is formed. Is provided with a pair of notches 7a, 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 region weak seal portion 3 to protect the weak seal portions 5 on both sides from the contents in the storage chamber 20. Additional strong seal portions 4 and 4 are connected. The additional strong seal portions 4, 4 protrude from the peripheral strong seal portions 6, 6 toward the spout region weak seal portion 3 and are connected to both weak seal portions 5. Thus, the guide path 15 for guiding the contents M (see FIG. 4) in the bag body 1 toward the spout region weak seal portion 3 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 contents M.

  As described above, the easily peelable film 9 has the weak seal layer 9a formed on one surface and the strong seal layer 9b formed on the other surface. For this reason, 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. 8 strong seal layer 8a and strong seal layer 9b of easily peelable film 9 are included. Thus, when the spout region weak seal portion 3 is peeled off, it is peeled mainly through the weak seal portion 30 (see FIG. 3A).

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

  Furthermore, 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 films 8 and 8.

  2A, 2B, and 2C are schematic plan views illustrating the embodiments (a) to (c) of the bag 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. When the bag body 1 is torn and opened from the notch 7a, the non-sealed region 13 is opened. When the contents M in the storage chamber 20 are pressurized, the pressurized contents M are guided from the guide path 15 toward the spout region weak seal portion 3 and peel off the spout region weak seal portion 3. . As a result, the spout region 3A is formed in the bag 1, and the contents A are discharged outward from the spout region 3A and the non-seal region 13.

  As shown in FIG. 3 (a), in the cross section of the spout region weak seal portion 3 in the easily peelable film 9 of the bag indicated by XX 'in FIG. 2A, a weak seal portion 30 and a strong seal portion are provided. However, it is the weak seal portion 30 that actually functions and the contents pass through. Moreover, as shown in FIG.3 (b), in the cross section of the location which provided the additional strong seal part 4 of the bag body 1 shown by YY 'in FIG. 2A, the easily peelable film 9 is the additional strong seal part 4. And the upper strong seal portion 7 of the bag body 1.

  Next, the bag 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 substrate films 8 and 8. The easily peelable film 9 forms the spout region weak seal part 3 and both side weak seals 5 and 5 located on both sides of the spout region weak seal part 3. A pair of additional strong seal portions 4 extending from the peripheral strong seal portions 6 and 6 toward the spout region weak seal portion 3 side are provided, and the inclined lines are formed by the weak seal portions 5 and 5 on both sides 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 and sealing the contents M in the bag body 1 does not tear the bag body 1, and grips and presses the bag body 1, thereby weakly sealing the spout region. The part 3 is peeled to form the spout region 3A, and the contents M can be poured out from the spout region 3A. When 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 the tapered bag-shaped bag body 1 according to the embodiment (c). As shown in FIG. 2C, the easy-peelable film 9 forms the spout region weak seal portion 3 and both 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 region weak seal portion 3 side are provided, and the inclined lines are formed by the weak seal portions 5 and 5 on both sides 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 are stably guided from the guide path 15 to the spout region weak seal part 3, and the spout region weak seal part 3 is peeled off. Thus, the spout region 3A is formed, and the contents can be squeezed out.

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

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

(Additional strong seal part 4)
In the bag 1 according to the present invention, the additional strong seal portion 4 protrudes toward the spout region weak seal portion 3 side from the peripheral strong seal portion 6 at a position away from the easily peelable film 9 in the storage chamber 20 side, A guide path 15 is formed together with the spout region weak seal portion 3. In this case, since the contents hardly leak from the weak seal portions 5 on both sides which are weak seal portions, the length of the additional strong seal portion protruding from the peripheral strong seal portion 6 need not be specified. By intentionally shortening the length of the additional strong seal portion 4, the spout region weak seal portion 3 can be easily peeled off at the time of use, or conversely, the spout region weak seal portion 3 can be intentionally lengthened during distribution. You may make it not peel. Moreover, if it considers the balance between the peripheral strong seal part 6 of the bag body 1, the peeling strength of the spout area | region weak seal part 3, the ease of peeling of the spout area | region weak seal part 3 at the time of use, etc., it should design. Good.

(Base film 8, 8)
The base films 8 and 8 forming the bag according to the present invention are composed of a laminated film in which at least a base and a heat-sealable film are laminated, and an intermediate layer between the base and the heat-sealable film as necessary. May be provided.

  As the base material, biaxially stretched films excellent in physical strength and heat resistance, such as polyethylene terephthalate, polyethylene butylate, polyamide, polypropylene, and polyethylene, which are generally used for food packaging materials, and these A film in which a metal oxide or a metal is vapor-deposited on the film, an oxygen barrier coating is applied, or an easy adhesion layer is provided can be used.

  As the heat-sealable film, a general heat-sealable film that is softened by heating and thermally fused by applying pressure can be used. Polyethylene, polypropylene, polyester, polyacrylonitrile, cyclic olefin copolymer, acid-modified There are unstretched films such as polyolefins, ethylene / vinyl acetate copolymers, and ionomers.

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

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

  The bag body 1 according to the present invention can be printed with characters and patterns, and is usually printed on the substrate by gravure printing, flexographic printing, or the like.

(Easily peelable film 9)
The easily peelable film 9 used in the bag according to the present invention has a weak sealing layer 9a having a weak sealing property with respect to the heat sealing surface of the laminated film formed on at least one surface, and is a single film, a coextruded film, or And any one of laminated films.

  There are cohesive failure, delamination, and interfacial delamination as the delamination method of the weak seal layer 9a of the easy-peelable film 9, but any method may be used.

  For example, many coextrusion easily peelable films 9 are commercially available from many film manufacturers, and when the heat seal 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 weak sealing properties is used. Moreover, if the heat-seal surface of the base film 8 is polypropylene, one surface is made of polypropylene, and an easily peelable film 9 having the other surface weakly sealed with respect to polypropylene is used.

(Bag 1)
The form of the bag 1 used in the present invention is a flat bag, a stand pack, a bottom gusset bag, a pillow bag, and the like. The form which can be manufactured with the bag making machine which can be supplied can be utilized.

  Moreover, if the supply apparatus of the strip | belt-shaped easily peelable film 9 is attached, it can manufacture also with the filling packaging machine which fills the content and seals it, forming a bag.

(Shape of additional strong seal part)
The additional strong seal portion 4 provided in 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, the effect of making it difficult to peel off the weak seal portion for opening the contents is great. However, even if the content-side seal edge of the additional strong seal portion 4 is inclined with respect to the peripheral strong seal portion 6 as shown in FIG. The effect of making it difficult to obtain can be obtained.

(Outlet area weak seal 3)
The shape of the spout region weak seal portion 3 provided in the bag 1 used in the present invention may be any shape such as a straight line, a circular arc, and a corrugated shape, but the seal width, the weight and fluidity of the contents, the outer box In consideration of conditions such as the presence or absence, it is sufficient to design one that is easy to peel off during use and hard to peel off during transportation.

(Shape of spout region 3A)
Since the bag body 1 used in the present invention can regulate the outlet of the contents M due to the presence of the additional strong seal portion 4, the contents comprising the unsealed portion 13 before and after the spout region weak seal portion 3. By providing this flow path, it can be set as a spout.

  The spout is composed of a region sandwiched between the spout region weak seal portion 3 or the additional strong seal portion 4 and the inner side of the bag body 1 from the spout region weak seal portion 3 is added in the vicinity of the easily peelable film 9. Providing an extended portion of the strong seal portion 4 makes it difficult to peel off during transportation.

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

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

  In the case of the package 12 according to the present invention, in order to make it difficult for the spout region weak seal portion 3 to peel off during transportation, the protruding length of the additional strong seal portion 4 is increased to increase the space between the additional strong seal portions 4. Reduce the distance. In this case, like the packaging body 12 using the bag body 1 having the conventional spout region weak seal portion 3, the packaging body 12 is placed on a table such as a table and the palm is placed in the storage chamber 20, and the palm is placed on the palm. In the method of applying pressure so that the weight is placed, it is difficult to peel off the spout region weak seal portion 3.

  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 body 1 from the one peripheral strong seal portion 6 toward the opposite peripheral strong seal portion 6. The effect that a spout area | region weak seal part peels easily is acquired.

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

  That is, in the case of the packaging body 12 having a width of the storage chamber 20 of only a few centimeters, such as a saucer bag attached to a edible natto, the right and left peripheral strong seal portions of the storage chamber 20 6 with a thumb and forefinger attached to each other and pinching the bag body 1 and applying force to bring the seal edges inside the bag body 1 of the right and left peripheral strong seal portions 6 closer to the contents in the pressure chamber 20. Apply pressure. Accordingly, if the width of the pressurizing chamber 20 is too large to be picked with a finger, the seal edges inside the bag body 1 of the right and left peripheral strong seal portions 6 of the pressurizing chamber 20 can be held with one hand. Tighten to get close. Alternatively, when the bag body 1 is further large, the packaging body 12 is crushed so that the seal edges inside the bag body 1 of the right and left peripheral strong seal portions 6 of the pressurizing chamber 20 are brought close to each other with both hands. In this way, the package 12 at the location where the additional strong seal portion 4 is provided is restrained from expanding, the pressure between the additional strong seals 20 increases, and the contents side of the spout region weak seal portion 3 is easily expanded. By this, the spout area | region weak seal part 3 can be peeled easily.

  When the pressure is applied to the pressurizing chamber 20 by placing it on the 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 twelve opening method, there is little escape space for the pressure in the lateral direction, and the pressure is concentrated in the longitudinal direction, so that the finger force, gripping force, and arm force required to peel the spout region weak seal portion 3 are not so necessary. .

  In the bag body 1 ′ without the additional strong seal portion 4 shown in FIG. 1, if the spout region weak seal portion 3 is peeled off by the method of compressing the bag body 1 in the lateral direction, the spout region weak seal portion 3. It is difficult to stabilize the peeled portion. Further, since there is a possibility that the peripheral weak seal portion 5 may be peeled off, it is dangerous to peel the spout region weak seal portion 3 by gripping or grasping the bag body in the bag body 1 ′ shown in FIG. It was accompanied.

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

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

(Manufacture of bags)
The above laminated film A is set in a flat bag making machine capable of producing a self-supporting bag, and a 30 μm-thick strip-like easily peelable film (product name “7601ED”, Toray Film Processing Co., Ltd.) Manufactured) was set in the bottom material supply part of the self-supporting bag, and the easy-release film was supplied to the bag making machine together with the laminated film A without folding it in half. In addition, a horizontal seal portion having a width of 20 mm is provided at intervals of 140 mm, and a vertical seal portion having a width of 10 mm is provided on the strip-like easily peelable film 9, and then a decorative trim having a length of 180 mm in the horizontal direction is applied. Was cut into a side seal portion having a width of 10 mm, and a bag 1 shown in FIG. 4 having a width of 140 mm and a length of 180 mm was obtained. The easily peelable film 9 of the bag body 1 is located at a position 5 mm to 35 mm below the upper end of the bag body, and the vertical seal portion corresponding to the spout region weak seal part 3 is located at a position 20 mm to 30 mm below the upper end of the bag body. It is in.

  Moreover, as a result of measuring the peel strength of the spout region weak seal portion 3, it showed a considerably low peel strength of 3.4 N / 15 mm.

  The easily peelable film 9 is a co-extruded film showing easy peelability with respect to polyethylene, and the opposite surface of the weakly sealed surface is a polyethylene surface. When applied, one side shows a weak seal and the other side shows a strong seal.

  Using a heat sealer with a seal width of 20 mm for the bag body 1, the peripheral strength of both sides is set 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. The additional strong seal portion 4 having a width of 5 mm in 10 mm increments was provided evenly so that the protruding 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 that of the additional strong seal portion 4 is provided between the additional strong seal portion 4 and the spout region weak seal portion 3, and the present invention is similar to the bag 1 shown in FIG. Four types of such bag bodies were obtained.

(Manufacture of packaging)
Four types of bags provided with an additional strong seal portion 4 and a bag body provided with no additional strong seal portion 4 as a comparative example are filled with 200 ml of water, and a heat seal having a width of 10 mm is applied to the lower end of the bag body 1 for sealing. And the package 12 which concerns on this invention, and the package 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, and compressed at a speed of 100 mm / min using a tensile tester until the weak seal part for releasing the contents peels off and breaks the bag. The maximum load was measured.

  In the measurement, a compression jig having a diameter of 100 mm was used, and the package was 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 as much as possible and then placed on the package 12. The tension test is performed so that the position of the package 12 is adjusted so that the acrylic resin plate is horizontal with the acrylic resin plate laid under the package 12, and the compression jig compresses the center of the acrylic resin plate. The sample position on the machine was adjusted and a compression test was performed.

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

  From the result shown in Table 1, when the total of the protruding lengths of the additional strong seal portions on both sides exceeds one third of the inner dimension (120 mm) in the width direction of the bag body 1 (exceeds 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 pressure chambers 20 of the four types of packaging bodies 12 made of the bag body 1 provided with the additional strong seal portion 4 were grasped with one hand and opened.

  As a result, any package 12 could easily peel the spout region weak seal portion 3. Since the package 12 having a large protruding length of the additional strong seal portion 4 has a limited range in which the spout region weak seal portion 3 is peeled off, the contents are difficult to scatter when the bag is broken.

(Manufacture of bags)
Bag making was carried out using the laminated film A and the same bag making machine and easily peelable film as in Example 1, but the position of the vertical seal portion corresponding to the spout region weak seal portion 3 was set at the upper end of the bag body. From 15 mm to 25 mm below, 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-like easily peelable film 9 as in Example 1 slit in a width of 25 mm is set in the bottom material supply part of the self-supporting bag. The belt-like easily peelable film 9 was supplied to the bag making machine together with the laminated film A without being folded in two, and a horizontal seal portion having a width of 20 mm was provided at intervals of 70 mm. In addition, a longitudinal seal portion having a width of 10 mm is provided on the strip-shaped easily peelable film 9, and then a trimming process having a lateral length of 140 mm is performed, and cutting is performed at the center of the lateral seal portion to form a peripheral strong seal portion 6 having a width of 10 mm Thus, a bag of a 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 at a position 5 mm to 30 mm below the upper end of the bag body 1, and the vertical seal portion corresponding to the weak seal part for opening the contents is 15 mm to 25 mm below the upper end of the bag body. In position.

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

(Manufacture of packaging)
Twenty bags of each of the package bodies 12 were manufactured by filling 30 bags of water in the bag body of Example 2 and the bag body of the comparative example, and sealing the openings 11 by heat sealing.

(Opening test)
As a result of carrying out the test of pouring the contents by holding the packaging body 12 with one hand, all of the packaging bodies of Example 2 exit from the spout at the upper end of the bag body, and the direction in which the contents exit is also the spout. Since it came out straight in the direction of, it was a very easy to handle package.

  Moreover, as for the package 12 of the comparative example, the contents of the two bags came out from the weak seal portion of the side seal portion, and there was no practicality.

DESCRIPTION OF SYMBOLS 1 Bag body 3 Outlet area | region weak seal part 3A Outlet area | region 4 Additional strong seal part 5 Both-side weak seal part 6 Periphery strong seal part 7 Upper strong seal part 8 Base film 8a Strong seal layer 9 Easy peelable 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 (4)

A pair of substrate films having a strong sealing layer on each inner surface and superposed on each other;
In a bag comprising a storage chamber and an openable spout region, comprising an easily peelable film having a weak seal layer formed on at least one surface, interposed between the pair of substrate films,
The easily peelable film covers at least the spout region in the bag body, and extends in a band shape from one edge of the bag to the other edge,
The easily peelable film has a spout region weak seal part that forms the spout region, and a pair of both side weak seal portions formed at both ends of the spout region weak seal part,
The pair of base film has a peripheral strong seal portion formed on the peripheral portion of the bag,
A bag body characterized in that a pair of additional strong seal portions extending toward the spout region weak seal portion are provided on the peripheral strong seal portion.   2. The bag according to claim 1, wherein each of the weak seal portions on both sides forms a guide path for guiding the contents to the side of the spout region weak seal portion together with the additional strong seal portion.   The bag according to claim 1, wherein the guide path includes an inclined line that guides contents to the spout region weak seal part side. A bag body according to any one of claims 1 to 3,
A package comprising the contents stored in the bag.

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