WO2022131330A1 - Pressurization packaging and method for manufacturing pressurization packaging - Google Patents

Abstract

This pressurization packaging accommodates, under pressure, a spherical body that has been filled with a gas. The pressurization packaging includes a flexible sheet, a communication portion, and a check valve. The flexible sheet has an accommodation space formed therein for accommodating the spherical body. The communication portion is formed in the sheet, and communicates the accommodation space with the outside. The check valve is provided to the communication portion. The check valve allows the accommodation space to be filled with the gas through the check valve, and prevents the gas filled into the accommodation space from being released to the outside.

Description

Method for manufacturing pressurized packaging and pressurizing packaging

The present invention relates to a pressurizing package for accommodating a gas-filled sphere while pressurizing it and a method for manufacturing the pressurizing package.

Pressurized packages that contain spheres filled with a gas such as nitrogen are known. For example, Patent Document 1 discloses a plastic blow-molded container (1) for accommodating a tennis ball, which is an example of a sphere. The plastic blow-molded container (1) includes a body portion (11) for accommodating a tennis ball and an aluminum lid (2) attached to an opening of the body portion (11). The body portion (11) is filled with gas so that the internal pressure is, for example, 1 kg / cm ² .

A tennis ball is stored in order to stably store an article that is filled with pressurized gas, such as a tennis ball, and whose internal gas gradually escapes when left at atmospheric pressure. It is necessary to fill the inside of the container with a pressurized gas to prevent the gas inside the tennis ball from escaping.

Tennis balls for games, called pressure balls, are filled with nitrogen gas, and if left in the air, the nitrogen gas inside will gradually escape and the internal pressure will drop.Therefore, new tennis balls have traditionally been replaced with metal cans. It is common practice to store in a sealed container, enclose nitrogen in a can, and store in a state where the pressure is increased. As the pressure, a gauge pressure of about 0.1 MPa is required.

Since metal cans are expensive, various attempts have been made to replace metal cans with cheaper packaging. The plastic blow-molded container described in Patent Document 1 is a plastic biaxially stretched blow-molded container having a wide-mouthed opening, and has a convex portion inside the vicinity of the container opening to prevent the contents from popping out. It is a plastic blow-molded container characterized by being provided. Since this container uses an aluminum lid as a lid, it has a drawback that it is troublesome to separate the container at the time of disposal.

The package described in Patent Document 2 and the method of enclosing gas in the package are intended to realize a container for tennis balls by further using a flexible packaging bag, and also a method of enclosing air in the packaging bag. It is described. This package has succeeded in preventing the enclosed gas from coming out by using a gas barrier film that does not easily allow gas to permeate, and since it uses only plastic materials, it does not need to be sorted at the time of disposal. Therefore, it is also advantageous in terms of manufacturing cost as compared with the plastic blow-molded container described in Patent Document 1.

On the other hand, as a method of opening the packaging bag, it is generally practiced to provide a notch for starting opening at any part of the seal portion, make a rift in the laminate from the notch, and tear the seal portion. However, when a large internal pressure is applied as in the case of the package described in Patent Document 2, the seal portion of the normal package bag may cause the seal to retract, so that a stronger seal strength than the normal package bag is required. Therefore, it is necessary to increase the seal width accordingly.

In general, in order to increase the sealing strength, it was necessary to make the sealant layer thicker, so the laminate was also thicker and the sealing width was large, so it had to be difficult to open by hand. Further, in the packaging bag to which the internal pressure is applied, since the laminated body rises at a steep angle at the inner end of the seal portion, there is a problem that the rift stops even after passing through the seal portion.

Further, in a packaging bag to which internal pressure is applied as in the packaging body described in Patent Document 2, since the laminated body rises at a steep angle at the inner end of the sealing portion, a rift is formed after passing through the sealing portion. There was a problem that it stopped there.

Japanese Unexamined Patent Publication No. 7-256738 Japanese Unexamined Patent Publication No. 2012-11156

However, the plastic blow-molded container (1) has a problem that it is not easy to fill the inside with gas and pressurize it. Further, structurally, the opening of the body portion (11) may be bent, so that gas may escape from between the opening portion of the body portion (11) and the aluminum lid (2), and the internal pressure of the sphere is increased. There was a problem that it was easy to decrease. Further, since the container (1) has rigidity, there is also a problem that it is difficult to reduce the volume of waste after taking out the sphere from the container (1). Furthermore, in order to prevent gas leakage inside the container as much as possible, the opening of the body (11) is firmly closed by the aluminum lid (2), so that it is difficult to open the aluminum lid (2). There was also the problem that it was difficult to take out the sphere.

The pressurizing package according to the first aspect of the present invention accommodates a sphere filled with gas while pressurizing it. The pressurizing package is provided in a flexible sheet in which a storage space for accommodating the sphere is formed, a communication portion formed in the sheet and communicating the accommodation space with the outside, and the communication portion. A check valve is provided, and the check valve allows gas to be filled in the accommodation space through the check valve and regulates the gas filled in the accommodation space to escape to the outside. do.

According to the above-mentioned pressurizing package, gas can be easily and surely filled in the accommodation space via the check valve. In addition, since there is no possibility that the gas will escape from the check valve or the seat, or the gas will hardly escape, it is possible to prevent a decrease in the internal pressure of the sphere. Further, since it is mainly composed of a flexible sheet, it is possible to reduce the amount of waste by taking out the sphere from the pressurizing package and then folding it compactly. Further, since the pressurizing package can be opened by tearing the sheet or the like, the sphere can be easily taken out.

Further, the check valve includes a main body having a through hole to penetrate, a plug for opening and closing the through hole, and a flexible member for connecting the main body and the plug, and the plug has a gas in the accommodation space. At the time of filling, the through hole is opened, while the accommodation space is filled with a gas at a predetermined pressure, and then the through hole is closed.

According to this, the gas can be easily and surely filled in the accommodation space through the check valve, and the gas filled in the accommodation space can be surely regulated to escape to the outside.

Further, the sheet may be made of a plurality of heat-sealable materials, and the accommodation space may be formed by heat-sealing a predetermined sealing portion.
According to this, it is possible to form a storage space having a desired shape and size, and it is possible to reliably regulate the gas filled in the storage space from escaping from the sheet to the outside.

Further, the sheet may include a main body portion and a planned separation portion, and the sealing portion may have a notch for separating the main body portion and the planned separation portion.
According to this, the pressurizing package can be easily and surely opened only by tearing the sheet starting from the notch provided in the seal portion.

Further, the sheet may include a chuck for opening and closing an opening formed by separating the planned separation portion from the main body portion. According to this, even after the planned separation portion is separated from the main body portion, the opening can be closed, so that the sphere can be carried in a state of being housed in the main body portion, and the convenience is enhanced.

Further, the seal portion may have a contact prevention seal portion that prevents the sphere accommodated in the accommodation space from coming into contact with the check valve. For example, the contact prevention seal portion may be configured to become wider as it approaches the check valve from the side seal portion provided along the side edge of the sheet.

According to these, it is possible to prevent the sphere from coming into contact with the check valve and prevent the check valve from being inadvertently opened or damaged.
Further, the accommodation space is preferably pressurized at a pressure in the range of 0.07 MPa or more and 0.2 MPa or less at 25 ° C.

According to this, it is possible to pressurize more than the internal pressure of the sphere accommodated in the accommodation space within the range of the pressure resistance of the sheet.
Further, the pressurizing package may include the sphere to be accommodated in the accommodation space.

According to this, the same effect as the above-mentioned pressurizing package can be obtained.
The pressurizing package according to the second aspect of the present invention stores and stores the sphere in a pressurized state. The pressurizing package includes a pair of laminates, a notch, and an overhanging shape portion. The pair of laminates each have a gas barrier layer and a sealant layer. Each of the sealant layers has a peripheral edge. The pair of laminated bodies include a storage portion and a sealing portion formed by heat-sealing the peripheral portions thereof in a state where the sealant layers face each other. The notch is provided in the seal portion and serves as an opening start portion. The overhanging shape portion is provided between the notch and the storage portion. The overhanging shape portion is an unsealed portion protruding from the storage portion toward the notch.

The pressurized package according to the present invention can be easily opened by providing an unsealed overhanging shape portion between the notch and the storage portion.
Further, an opening is provided between the storage portion and the overhanging shape portion, and the vertical dimension of the overhanging shape portion is longer than the width of the opening portion, and the opening is formed. The portion of the seal portion has a constricted portion that constricts the opening.

The width of the constricted portion is 2 mm or more.
Further, the width of the opening is 2 mm or more.
The pressurizing package according to the third aspect of the present invention stores and stores the contents in a state of being pressurized to a pressure higher than the atmospheric pressure. The pressurizing package includes a front surface laminate, a back surface laminate, a notch, and a deformed portion. The front surface laminate and the back surface laminate have a gas barrier layer and a sealant layer, respectively. Each of the sealant layers has a peripheral edge. The front surface laminated body and the back surface laminated body include a storage portion and a sealing portion formed by heat-sealing the peripheral portions thereof in a state where the sealant layers face each other. The notch is provided in the seal portion and serves as an opening start portion. The deformed portion is provided between the notch and the accommodating portion. The deformed portion is an unsealed portion protruding from the storage portion toward the notch. The angle (opening angle α) between the front surface laminated body and the back surface laminated body at the point where the cut of the sealed portion starting from the notch reaches the deformed processed portion is 100 ° or less.

In the pressurizing package according to the present invention, the cut of the seal portion starting from the notch is deformed by providing an unsealed deformed processed portion protruding from the storage portion toward the notch between the notch and the storage portion. The angle (opening angle α) formed by the front surface laminated body and the back surface laminated body at the point where the processed portion is reached can be set to 100 ° or less, and the opening property is improved.

Further, the diameter of the short side of the pouch during pressurization is (D), the inner dimension of the long side of the pouch is (L), and the distance from the center of the long side of the pouch to the center of the deformed portion is (A). At that time, A> D.
The method for manufacturing a pressurized package according to a fourth aspect of the present invention includes a flexible sheet in which a storage space for accommodating a sphere filled with gas is formed, and a storage space formed in the sheet. A pre-pressurized package for pressurization is prepared, which is provided with a communication portion that communicates with the outside and a check valve that is provided in the communication portion and regulates the gas filled in the accommodation space from escaping to the outside. When the sphere is accommodated in the accommodation space through the opening formed in the pressurizing package, the opening of the pressurizing package is closed and the accommodation space of the pressurizing package is accommodated. By filling the gas through the check valve, the accommodation space is pressurized to be higher than the internal pressure of the sphere.

According to this, the pressurizing package according to the first aspect can be easily and surely manufactured.

According to the pressurizing package according to the first aspect of the present invention, the gas can be easily and surely filled in the accommodation space via the check valve. In addition, since there is no possibility that the gas will escape from the check valve or the seat, or the gas will hardly escape, it is possible to prevent a decrease in the internal pressure of the sphere. Further, since it is mainly composed of a flexible sheet, it is possible to reduce the amount of waste by taking out the sphere from the pressurizing package and then folding it compactly. Further, since the pressurizing package can be opened by tearing the sheet or the like, the sphere can be easily taken out.

According to the pressurized package according to the second aspect of the present invention, the unsealed overhanging shape portion is provided between the notch which is the opening start portion and the storage portion, so that the sealed portion to be cut is provided. As the width becomes narrower, the opening angle of the front and back laminated bodies at the time of passing through the sealing portion becomes smaller, which has the effect of making it easier to open.

According to the pressurized package according to the third aspect of the present invention, the unsealed deformed portion is provided between the notch which is the opening start portion and the storage portion, so that the cut of the seal portion starting from the notch is provided. However, the angle formed by the front surface laminate and the back surface laminate (opening portion angle) at the point where the deformed portion is reached is 100 ° or less, and as a result, the cut of the seal portion is smoothly formed between the front surface laminate and the back surface laminate. Migrate and easy to open. When the diameter of the short side of the pouch under pressure is (D), the inner dimension of the long side of the pouch is (L), and the distance from the center of the long side of the pouch to the center of the deformed portion is (A). When A> D, the opening position is farther from the center of the pouch, so that the opening property is better.

FIG. 1 is a perspective view of the pressurizing package of the first embodiment. FIG. 2 is a cross-sectional view showing the layer structure of the sheet of FIG. FIG. 3 is a cross-sectional view of the check valve of FIG. FIG. 4 is a front view of the nozzle inserted into the check valve of FIG. FIG. 5 is a cross-sectional view of a state in which the nozzle is inserted into the check valve of FIG. FIG. 6 is a perspective view of the pressurizing package before closing. FIG. 7 is a perspective view of a state in which a sphere is housed in the pressurizing package before closing of FIG. FIG. 8 is a table showing test conditions and test results of Examples and Comparative Examples of the first embodiment. FIG. 9 is a front view of the pressurizing package before closing of the second embodiment. FIG. 10 is a front view of a first modification of the pressurizing package before closing of the second embodiment. FIG. 11 is a front view of a second modification of the pressurizing package before closing of the second embodiment. FIG. 12 is a schematic plan view showing a pouch for a tennis ball according to a third embodiment. FIG. 13 is a schematic cross-sectional view showing the AA'cross section of FIG. FIG. 14 is a schematic cross-sectional view showing the BB'cross section of FIG. 15A and 15B are cross-sectional explanatory views showing the angle α formed by the seal portion and the surface laminated body at the time of opening, FIG. 15A is a case where there is no overhanging shape portion, and FIG. 15B is an overhanging portion. The case where there is a shape part is shown. FIG. 16 is an enlarged view of the dotted line portion of FIG. 12, and is an explanatory diagram of various dimensions related to the overhanging shape portion. FIG. 17 is an explanatory diagram showing an example of another shape of the overhanging shape portion of the third embodiment. FIG. 18 is an explanatory diagram showing an example of another shape of the overhanging shape portion of the third embodiment. FIG. 19 is an explanatory diagram showing an example of another shape of the overhanging shape portion of the third embodiment. FIG. 20 is an explanatory diagram showing an example of another shape of the overhanging shape portion of the third embodiment. FIG. 21 is a table showing test conditions and test results of Examples and Comparative Examples of the third embodiment. FIG. 22 is a plan explanatory view showing the structure of the pressure pouch of the fourth embodiment, the dimensions of each part, and the like. FIG. 23 is a schematic cross-sectional view showing the BB'cross section of FIG. 22, and is an explanatory view of the opening angle α. FIG. 24 is a schematic cross-sectional view showing the CC'cross section of FIG. 22, and is an explanatory view of the diameter D of the short side and the opening angle α when the deformed portion is not present. FIG. 25 is an enlarged plan schematic view showing an example of the shape of the deformed processed portion of the fourth embodiment. FIG. 26 is an enlarged plan schematic view showing another example of the shape of the deformed portion of the fourth embodiment. FIG. 27 is an enlarged plan schematic view showing another example of the shape of the deformed portion of the fourth embodiment. FIG. 28 is an enlarged plan schematic view showing another example of the shape of the deformed portion of the fourth embodiment. FIG. 29 is an enlarged plan schematic view showing another example of the shape of the deformed portion of the fourth embodiment. FIG. 30 is a table showing test conditions and test results of Examples and Comparative Examples of the fourth embodiment.

(First Embodiment)
FIG. 1 shows an example of a pressurizing package 10 that houses a sphere 100 filled with gas. The sphere 100 is, for example, a tennis ball. The type of gas filled in the sphere 100 can be arbitrarily selected. The gas filled in the sphere 100 is, for example, nitrogen or air. The internal pressure of the sphere 100 can be arbitrarily selected. The internal pressure of the sphere 100 is, for example, included in the range of 0.07 Mpa or more and 0.08 Mpa or less at 25 ° C. The number of spheres 100 housed in the pressurizing package 10 can be arbitrarily selected. In the example shown in FIG. 1 and the like, the number of spheres 100 housed in the pressurizing package 10 is two.

The main elements constituting the pressurizing package 10 are the sheet 20, the seal portion 30, and the check valve 40. The dots in FIG. 1 and the like represent the seal portion 30. Hereinafter, the left-right direction of the pressurizing package 10 in the front view of the pressurizing package 10 is referred to as a standard width direction XA, and a direction orthogonal to the standard width direction XA is referred to as a standard height direction XB.

Sheet 20 includes the first sheet 21 and the second sheet 22. The first sheet 21 and the second sheet 22 are joined by the seal portion 30 so that the accommodation space 10A accommodating the sphere 100 is formed between the sheets 21 and 22. The accommodation space 10A is filled with an arbitrary gas so that the gas filled in the sphere 100 does not escape from the sphere 100. The gas filled in the accommodation space 10A can be arbitrarily selected. In one example, the gas filled in the accommodation space 10A is nitrogen or air. The pressure of the accommodation space 10A is set in a range equal to or higher than the internal pressure of the sphere 100. The pressure of the accommodation space 10A is included in the range of 0.07Mpa or more and 0.2Mpa or less at 25 ° C., for example. In one example, the pressure in the containment space 10A is 0.1Mpa.

The first sheet 21 and the second sheet 22 are two individually formed sheets. The sheet 20 has a layered structure in which a plurality of layers are laminated. The layer structure of the sheet 20 can be arbitrarily selected. In the first example, the sheets 21 and 22 have the same layer structure. In the second example, each sheet 21 and 22 has a different layer structure. FIG. 1 shows a pressurizing package 10 composed of a sheet 20 having a layered structure of the first example.

FIG. 2 is a cross-sectional structure in which the sheets 21 and 22 are cut along the thickness direction of the sheets 21 and 22. Each of the sheets 21 and 22 includes an outermost layer 20A, a first adhesive layer 20B, an intermediate layer 20C, a second adhesive layer 20D, and a sealant layer 20E. An example of the manufacturing method of the sheets 21 and 22 is dry laminating.

The outermost layer 20A is laminated on the outermost side of the sheet 20, in other words, at the position farthest from the sphere 100. The outermost layer 20A is made of, for example, a material having excellent gas barrier properties. Therefore, the quality of the sphere 100 is well maintained for a long period of time. The material constituting the outermost layer 20A is, for example, polyethylene terephthalate on which an inorganic thin film such as aluminum oxide or silicon oxide is vapor-deposited. The gas whose permeation is suppressed by the outermost layer 20A is, for example, oxygen. The thickness of the outermost layer 20A can be arbitrarily selected. The thickness of the outermost layer 20A is, for example, 12 μm.

The first adhesive layer 20B is provided between the outermost layer 20A and the intermediate layer 20C so as to bond the outermost layer 20A and the intermediate layer 20C. The material constituting the first adhesive layer 20B is, for example, a polyester urethane adhesive. The thickness of the first adhesive layer 20B can be arbitrarily selected. The thickness of the first adhesive layer 20B is, for example, 2 μm.

The intermediate layer 20C is located, for example, closer to the sphere 100 with respect to the outermost layer 20A. In the following, the sphere 100 closer to an arbitrary layer may be referred to as the inner side. The intermediate layer 20C is made of, for example, an excellent material for increasing the piercing strength. The material constituting the intermediate layer 20C is, for example, nylon. The thickness of the intermediate layer 20C can be arbitrarily selected. The thickness of the intermediate layer 20C is, for example, 25 μm.

The second adhesive layer 20D is provided between the intermediate layer 20C and the sealant layer 20E so as to bond the intermediate layer 20C and the sealant layer 20E. The material constituting the second adhesive layer 20D is, for example, a polyester urethane adhesive. The thickness of the second adhesive layer 20D can be arbitrarily selected. The thickness of the second adhesive layer 20D is, for example, 2 μm.

The sealant layer 20E is laminated, for example, at the innermost position of the sheet 20, in other words, at the position closest to the sphere 100. The sealant layer 20E is made of, for example, a heat sealable material. The material constituting the sealant layer 20E is, for example, linear low-density polyethylene. The thickness of the sealant layer 20E can be arbitrarily selected. The thickness of the sealant layer 20E is preferably determined based on the relationship between the difficulty of peeling the seal portion 30 and the thickness of the sheet 20. A preferred example of the maximum thickness of the sealant layer 20E is 160 μm. When the thickness of the sealant layer 20E is 160 μm or less, the thickness of the sheet 20 does not become too thick. A preferred example of the minimum thickness of the sealant layer 20E is 80 μm. When the thickness of the sealant layer 20E is 80 μm or more, the sealing strength of the sealing portion 30 can be increased, and even when the pressure of the accommodation space 10A is high, the sealing portion 30 is difficult to peel off. An example of a preferable range in which the thickness of the sealant layer 20E can be taken is 80 μm or more and 160 μm or less. In one example, the sealant layer 20E has a thickness of 120 μm.

The seal portion 30 joins the first sheet 21 and the second sheet 22, or joins the first sheet 21 and the second sheet 22 to the check valve 40. The outer shape of the pressurizing package 10 in the front view can be arbitrarily selected. In the example shown in FIG. 1, the outer shape of the pressurizing package 10 is rectangular. The sheet 20 can be divided into a portion surrounded by the seal portion 30 (hereinafter referred to as "inner portion 23") and a seal portion 30. The accommodation space 10A is a space surrounded by the inner portion 23 of the first sheet 21 and the inner portion 23 of the second sheet 22, and the seal portion 30 and the reverse are arranged so as not to communicate with the outside of the pressurizing package 10. It is closed by the stop valve 40.

The seal portion 30 includes an upper seal portion 31, a lower seal portion 32, a first side seal portion 33, a second side seal portion 34, and a valve seal portion 35. The upper seal portion 31 and the valve seal portion 35 are provided above the inner portion 23 in the standard height direction XB. The lower seal portion 32 closes the opening 50 (see FIG. 6). The lower seal portion 32 is provided below the inner portion 23 in the standard height direction XB. The first side seal portion 33 is provided on the right side or the left side of the inner portion 23 in the standard width direction XA. The second side seal portion 34 is provided on the left or right side of the inner portion 23 in the standard width direction XA.

The inner edge 31A of the upper seal portion 31, the inner edge 32A of the lower seal portion 32, the inner edge 33A of the first side seal portion 33, the inner edge 34A of the second side seal portion 34, and the inner edge 35A of the valve seal portion 35 are inner portions. It defines the inner shell of 23. The outer edge 31B of the upper seal portion 31, the outer edge 32B of the lower seal portion 32, the outer edge 33B of the first side seal portion 33, the outer edge 34B of the second side seal portion 34, and the outer edge 35B of the valve seal portion 35 are for pressurization. The outer shell of the package 10 is specified.

The width of each seal portion 31 to 35 can be arbitrarily selected. The width of each of the seal portions 31 to 35 is the length between the inner edges 31A to 35A and the outer edges 31B to 35B in the normal line of the center line of each of the seal portions 31 to 35. The center line of each of the seal portions 31 to 35 is a virtual line segment passing between the inner edges 31A to 35A and the outer edges 31B to 35B. When the width of each of the seal portions 31 to 35 is different for each portion, for example, the maximum width or the average of the widths of a plurality of portions in each of the seal portions 31 to 35 represents the width of the seal portion.

The seal strength of the seal portion 30 can be arbitrarily selected. The sealing strength of the sealing portion 30 is preferably determined based on the relationship between the difficulty of peeling the sealing portion 30 and the ease of heat sealing. An example of the maximum value of the seal strength of the seal portion 30 is 130 N / 15 mm. When the seal strength of the seal portion 30 is 80 N / 15 mm or less, the seal portion 30 cannot be formed under standard conditions. An example of the minimum value of the seal strength of the seal portion 30 is 70 N / 15 mm. When the sealing strength of the sealing portion 30 is 90N / 15mm or more, the sealing portion 30 is difficult to peel off even when the pressure of the accommodation space 10A is high. An example of the range in which the seal strength of the seal portion 30 can be taken is 90 N / 15 m or more and 130 N / 15 mm or less. In one example, the seal strength of the seal portion 30 is 100 N / 15 mm.

It is preferable that the width and height of the pressurizing package 10 are determined, for example, in relation to the number of spheres 100 to be accommodated and the portability of the pressurizing package 10. The width of the pressurizing package 10 is the length between the outer edge 33B of the first side sealing portion 33 and the outer edge 34B of the second side sealing portion 34 in the line segment orthogonal to the standard height direction XB. When the width of the pressurizing package 10 is different for each part, for example, the maximum width or the average of the widths of a plurality of parts represents the width of the pressurizing package 10. According to one example, the width of the pressurizing package 10 is 130 mm. The height of the pressurizing package 10 is the length between the outer edge 31B of the upper seal portion 31 and the outer edge 32B of the lower seal portion 32 in the line segment orthogonal to the standard width direction XA. When the height of the pressurizing package 10 is different for each part, for example, the maximum height or the average height of a plurality of parts represents the height of the pressurizing package 10. According to one example, the height of the pressurizing package 10 is 200 mm.

The width of the inner portion 23 of the pressurizing package 10 is determined, for example, so that the sphere 100 is substantially immovable in the standard width direction XA of the pressurizing package 10 when the pressurizing package 10 is being carried. It is preferable to be. Therefore, the position of the sphere 100 in the accommodation space 10A is stable. The width of the inner portion 23 of the pressurizing package 10 is the length between the inner edge 33A of the first side sealing portion 33 and the inner edge 34A of the second side sealing portion 34 in the line segment orthogonal to the standard height direction XB. That's right. When the width of the inner portion 23 is different for each portion, for example, the maximum width or the average of the widths of a plurality of portions represents the width of the inner portion 23. The width of the inner portion 23 is slightly longer than, for example, the outer diameter of the sphere 100. In one example, the width of the inner portion 23 is 110 mm.

The opening 50 (see FIG. 6) is formed between the lower portion 21A of the first sheet 21 and the lower portion 22A of the second sheet 22 so that the sphere 100 can be inserted into the accommodation space 10A. In the pressurizing package 10 shown in FIG. 1, the opening 50 is closed by the lower seal portion 32. The pressurizing package 10 in which the opening 50 is closed (hereinafter, “pressurizing package 10 after closing”) includes the main body portion 11 and the planned separation portion 12. The main body portion 11 and the planned separation portion 12 are separated by a notch 60 provided in the seal portion 30. The main body portion 11 is a portion that accommodates the sphere 100. The planned separation portion 12 is a part of each sheet 21 and 22 including the lower seal portion 32. By separating the planned separation portion 12 from the main body portion 11 triggered by the notch 60, an opening (not shown) capable of taking out the sphere 100 from the accommodation space 10A is provided between the first sheet 21 and the second sheet 22. It is formed. After the sphere 100 is taken out from the accommodation space 10A, for example, the main body portion 11 can be compactly folded, which contributes to the reduction of dissolution of waste. Further, since the sphere 100 can be taken out from the accommodation space 10A by tearing the sheet 20, the sphere 100 can be taken out more easily than when the metal lid is opened as in the prior art.

The pressurizing package 10 further includes a communication portion 70 that communicates the accommodation space 10A with the outside. The position where the communication portion 70 is provided in the pressurizing package 10 can be arbitrarily selected. In the example shown in FIG. 1 and the like, the communication portion 70 is provided at a position corresponding to the upper seal portion 31. In another example, the communication portion 70 is provided at a location corresponding to the lower seal portion 32, the first side seal portion 33, or the second side seal portion 34.

The check valve 40 is provided in the communication portion 70 so that the gas filled in the accommodation space 10A does not escape through the communication portion 70. As shown in FIG. 3, the check valve 40 includes a main body 41 and a through hole 42 penetrating the main body 41. The main body 41 is joined to the first sheet 21 and the second sheet 22 by the valve sealing portion 35 (see FIG. 1). The body 41 is formed, for example, by injection molding with a single plastic. A nozzle 80 (see FIG. 4) is inserted into the through hole 42. For example, a tube 200 is connected to the nozzle 80. The tube 200 is connected to a pump (not shown). The pump supplies the gas to the accommodation space 10A. The check valve 40 further comprises a plug 43 and a flexible member 45. The plug 43 has an annular wall portion 43A and an end wall portion 43B. The annular wall portion 43A and the end wall portion 43B form a space 44. The space 44 opens toward the through hole 42. The space 44 receives the nozzle 80. The flexible member 45 connects the main body 41 and the plug 43 so that the position of the plug 43 with respect to the main body 41 can be moved. When the check valve 40 and the nozzle 80 are not connected as shown in FIG. 3, the flexible member 45 moves the plug 43 to a position where the plug 43 comes into contact with the main body 41. When the check valve 40 and the nozzle 80 are coupled as shown in FIG. 5, the flexible member 45 moves the plug 43 to a position where the plug 43 does not contact the main body 41. Only when the check valve 40 and the nozzle 80 are coupled, the check valve 40 can be opened and the accommodation space 10A can be filled with gas via the tube 200 and the nozzle 80. Specifically, the gas sent from the pump connected to the tube 200 is filled in the accommodation space 10A through the opening 81 provided in the nozzle 80.

FIG. 6 is a pressurizing package 10 before the opening 50 is closed (hereinafter, “pressurizing package 10 before closing”). The sphere 100 (see FIG. 1) is accommodated in the accommodation space 10A from the opening 50 of the pressurizing package 10 before closing. By forming the lower seal portion 32 after the sphere 100 is housed, the closed pressurizing package 10 shown in FIG. 1 is obtained.

An example of a method for manufacturing the pressurizing package 10 will be described with reference to FIGS. 6 and 7. The method for manufacturing the pressurizing package 10 includes, for example, a sheet joining step, a valve mounting step, an accommodating step, a closing step, and a gas filling step.

In the sheet joining step, the first sheet 21 and the second sheet 22 are joined so that the upper seal portion 31, the first side seal portion 33, and the second side seal portion 34 are formed. The valve mounting step is performed after the seat joining step. In the valve mounting step, the check valve 40 is inserted into the communication portion 70, and the first sheet 21 and the second sheet 22 and the check valve 40 are joined so that the valve seal portion 35 is formed. When the valve mounting step is completed, the pressurizing package 10 before closing is manufactured as shown in FIG. The containment step is carried out after the valve mounting step. As shown in FIG. 7, in the accommodating step, the sphere 100 is accommodated in the accommodating space 10A through the opening 50 of the pressurizing package 10 before closing. The closing process is carried out after the containment process. In the closing step, the first sheet 21 and the second sheet 22 are joined so that the lower seal portion 32 is formed. The gas filling step is carried out after the closing step. In the gas filling step, the nozzle 80 (see FIG. 5) is inserted into the check valve 40, and the accommodation space 10A is filled with gas.

According to the pressurizing package 10 of the first embodiment, the following actions and effects can be obtained.
Since the accommodation space 10A is sealed by the seal portion 30 and the check valve 40, it is difficult for the gas filled in the accommodation space 10A to escape to the outside. The plug 43 and the flexible member 45 provided on the check valve 40 can further enhance the sealing of the accommodation space 10A. Further, when the gas in the accommodation space 10A escapes to the outside, the gas can be easily filled through the check valve 40. Therefore, the internal pressure of the sphere 100 is unlikely to decrease.

(Example)
The inventor of the present application conducted a test for confirming the relationship between the configuration of the pressurizing package 10 and the difficulty of reducing the internal pressure of the sphere 100 using the samples of the examples and comparative examples of the first embodiment. FIG. 8 shows the test conditions and test results for the sample of Example and the sample of Comparative Example. In the following description, for convenience of explanation, the same reference numerals are given to the parts in common with the sample of the example in the sample of the comparative example. The sample of the example is the pressurizing package 10 according to the embodiment. The sample of the comparative example is a pressurizing package 10 having a structure different from that of the sample of the example. The sample of the comparative example has the configuration shown in FIG. 1 of JP2012-11156. That is, the sample of the comparative example does not have the check valve 40.

The specifications of the samples of each example and each comparative example are as follows. The internal pressure of the sphere 100 of each example and each comparative example is 0.08 Mpa. The pressure of the accommodation space 10A of the samples of Examples 1 and 2 and the samples of Comparative Examples 1 and 2 is 0.08 Mpa. The pressure of the storage space 10A of the samples of Examples 3 and 4 and the samples of Comparative Examples 3 and 4 is 0.09 Mpa. In the samples of each Example and each Comparative Example, the closed pressurizing package 10 was manufactured by filling with air using a SealTester manufactured by Sun Scientific Co., Ltd. Then, the sample of each example and the sample of each comparative example were stored in a constant temperature bath maintained at a predetermined temperature and humidity. The constant temperature bath used in the test was SXN412 manufactured by Kusumoto Kasei Co., Ltd. The temperature of the constant temperature bath in which the samples of Examples 1 and 3 and the samples of Comparative Examples 1 and 3 are stored is 40 ° C. The temperature of the constant temperature bath in which the samples of Examples 2 and 4 and the samples of Comparative Examples 2 and 4 are stored is 50 ° C. The humidity of the constant temperature bath in which the sample of each example and the sample of each comparative example are stored is 75%. The period for storing the sample of each example and the sample of each comparative example in a constant temperature bath is 2 weeks. The number of samples in each example and the number of samples in each comparative example are 10. The internal pressure of each Example and each Comparative Example was measured by a digital pressure gauge KDM30-500 kPaG manufactured by Krone Co., Ltd.

In the test, it was visually confirmed whether or not gas was released from the accommodation space 10A for the sample of each example and the sample of each comparative example. The number of items of the number of missing items shown in FIG. 8 indicates the number of samples in a state where the gas is released from the accommodation space 10A and the pressurizing package 10 is withered.

According to the samples of each comparative example, it was confirmed that the gas escaped from the accommodation space 10A for all the samples. According to the sample of each example, it was confirmed that the gas did not substantially escape from the accommodation space 10A. It is considered that this is because the sample of each example is provided with the check valve 40, so that the escape of gas from the accommodation space 10A to the outside is suitably suppressed.

(Second Embodiment)
The package 10 of the second embodiment will be described with reference to FIG. 9. The configurations common to the first embodiment may be designated by the same reference numerals as those of the first embodiment, and duplicate description may be omitted. The package 10 of the second embodiment is different from the package 10 of the first embodiment in the configuration of the sealing portion 30, and otherwise has the same configuration as the package 10 of the first embodiment.

FIG. 9 is a pressurizing package 10 before closing. The seal portion 30 includes a contact prevention seal portion 130 that prevents the sphere 100 from coming into contact with the check valve 40. Therefore, the check valve 40 is less likely to be damaged. The contact prevention seal portion 130 is configured so that the pressure in the accommodation space 10A is less likely to act locally. Therefore, even when the pressure of the accommodation space 10A is relatively high, it is possible to prevent the contact prevention seal portion 130 from peeling off. In one example, the contact prevention seal portion 130 is configured so that the portion protruding from the upper seal portion 31, the first side seal portion 33, and the second side seal portion 34 into the accommodation space 10A does not include a corner. ..

The contact prevention seal portion 130 includes a first contact prevention seal portion 131 connected to the first side seal portion 33 and a second contact prevention seal portion 132 connected to the second side seal portion 34. The width of each of the contact prevention seal portions 131 and 132 becomes wider as the check valve 40 approaches from the side seal portions 33 and 34. In other words, in the standard width direction XA, the distance XC between the inner edge 131A of the first contact prevention seal portion 131 and the inner edge 132A of the second contact prevention seal portion 132 becomes narrower as it approaches the check valve 40. When the sphere 100 moves to approach the check valve 40 in the accommodation space 10A, the sphere 100 and the inner edges 131A and 132A of the contact prevention seal portions 131 and 132 come into contact with each other. Does not touch.

The width of each contact prevention seal portion 131, 132 is the length between the inner edges 131A, 132A and the outer edges 131B, 132B in the normal line of the center line of each contact prevention seal portion 131, 132. The center line of each of the contact prevention seal portions 131 and 132 is a virtual line segment passing between the inner edges 131A and 132A and the outer edges 131B and 132B. When the width of each of the contact prevention seal portions 131 and 132 is different for each part, for example, the maximum width or the average of the widths of a plurality of parts in each of the contact prevention seal portions 131 and 132 represents the width of the seal portion. do. The contact prevention seal portions 131 and 132 are provided from the side seal portions 33 and 34 to the side of the check valve 40.

The width LA of the contact prevention seal portions 131 and 132 in the standard width direction XA and the length LB of each contact prevention seal portion 131 and 132 in the standard height direction XB are based on the relationship with the width LC of the communication portion 70. It can be decided. In one example, the width LA is 35 mm. The length LB is 80 mm. The width LC is 60 mm. The width LA of the first contact prevention seal portion 131 and the width LA of the second contact prevention seal portion 132 may be different. The length LB of the first contact prevention seal portion 131 and the length LB of the second contact prevention seal portion 132 may be different. According to the pressurizing package 10 of the second embodiment, the action and effect similar to those of the pressurizing package 10 of the first embodiment can be obtained.

(Example)
The inventor of the present application conducted a transportation test and a drop test for confirming the relationship between the configuration of the pressurizing package 10 and the resistance to breakage of the check valve 40 using the sample of the example according to the second embodiment. An example of check valve breakage is chipping and cracking. The specifications of the sample of the example are as follows. The internal pressure of the sphere 100 is 0.08 Mpa. The pressure of the accommodation space 10A is 0.1Mpa. By filling the sample of the example with nitrogen using SealTester manufactured by Sun Scientific Co., Ltd., 12 packages for pressurization after closing were produced. Each of the closed pressurizing packages 10 contains 6 spheres 100.

In the transportation test, 12 closed pressurized packages 10 packed in a cardboard box were placed in the transportation tester. The transport tester used for the test is CV-300-2 manufactured by IMV Co., Ltd. The standard of the test method of the transportation test is Level 1 of JISZ0200. In the drop test, the twelve closed pressurizing packages 10 packed in a cardboard box were freely dropped once on each of the six sides of each of the three squares on the concrete from the specified height. The specified height is 80 cm. The standard of the test method for the drop test is JISZ0202.

In the transport test and drop test, it was visually confirmed whether or not the check valve 40 was damaged for the sample of the example. According to the sample of the example, the check valve 40 was not found to be damaged in all the 12 pressurized packages 10 after closing. Since the sample of the embodiment according to the second embodiment includes the contact prevention seal portion 130, the sphere 100 and the check valve 40 do not come into contact with each other. Therefore, it is considered that the check valve 40 is unlikely to be damaged.

(Modification example)
It should be noted that each of the above embodiments is an example of possible forms of the pressurizing package according to the present invention, and is not intended to limit the forms. The package according to the present invention may take a form different from the form exemplified in each embodiment. One example thereof is a form in which a part of the configuration of each embodiment is replaced, changed, or omitted, or a new configuration is added to each embodiment. An example of modification of each embodiment is shown below.

The pressurizing package 10 of the first embodiment and the modified example of the second embodiment includes a chuck provided so that the opening formed by the separation scheduled portion 12 being separated from the main body portion 11 can be opened and closed. The chuck is joined to, for example, the sealant layer 20E of the first sheet 21 and the sealant layer 20E of the second sheet 22. According to the pressurized package 10 of the modified example, the opening can be closed even after the planned separation portion 12 is separated from the main body portion 11, so that the sphere 100 can be carried in a state of being housed in the main body portion 11. Can be done. Therefore, convenience is enhanced.

-The configuration of the contact prevention seal portion 130 can be changed arbitrarily. As shown in FIG. 10, the pressurizing package 10 of the first modification of the second embodiment has a storage space 10A from the upper seal portion 31, the first side seal portion 33, and the second side seal portion 34. A square-shaped contact prevention seal portion 230 overhanging is provided. As shown in FIG. 11, the pressurizing package 10 of the second modification of the second embodiment includes a square-shaped contact prevention seal portion 330 projecting from the upper seal portion 31 to the accommodation space 10A. In the first modification and the second modification of the second embodiment, when the sphere 100 moves to approach the check valve 40 in the accommodation space 10A, the contact between the sphere 100 and the check valve 40 prevents contact. The check valve 40 is less likely to be damaged because it is hindered by the seal portions 230 and 330. However, in the contact prevention seal portion 230 shown in FIG. 10, since the portion protruding from the accommodation space 10A includes a corner, there is a possibility that the contact prevention seal portion 230 will peel off when the pressure of the accommodation space 10A of the second embodiment is high. Further, in the contact prevention seal portion 330 shown in FIG. 11, when the pressure in the accommodation space 10A is high, there is a possibility that edge breakage may occur at the root portion near the upper seal portion 31.

(Third Embodiment)
The pouch for a tennis ball as a pressurizing package according to the present invention will be described in detail with reference to the following drawings. FIG. 12 is a schematic plan view showing an embodiment of the tennis ball pouch 401 according to the present invention. FIG. 13 is a schematic cross-sectional view showing the AA'cross section of FIG. FIG. 14 is a schematic cross-sectional view showing a BB'cross section of FIG. Further, FIG. 16 is an enlarged view of the dotted line portion of FIG. 12, and is an explanatory diagram of various dimensions related to the overhanging shape portion 408.

The tennis ball pouch 401 according to the present invention is a pouch for storing and storing a tennis ball 420 as a sphere in a pressurized state, and the sealant layers of the laminated body 402 having a gas barrier layer and a sealant layer face each other. The peripheral portion is heat-sealed to form a storage portion 411 and a seal portion. The seal portion has a notch 407 that serves as an opening start portion, and is stored between the notch 407 and the storage portion 411. It is a pouch for a tennis ball characterized by having an unsealed overhanging shape portion 408 protruding from the portion toward a notch.

In the example shown in FIG. 12, as shown in the enlarged view of FIG. 16, the overhanging shape portion 408 has an elliptical shape that is long in the vertical direction, and the width of the opening 409 between the storage portion 411 and the overhanging shape portion 408. The vertical dimension of the overhanging shape portion 408 is longer than that of (W), and the sealing portion forming the opening 409 is constricted to form the constricted portion 410.

In the example shown in FIG. 12, the check valve 406 is attached to the top seal portion 404. The check valve is a valve for storing a tennis ball in a pouch, heat-sealing the peripheral portion, and then press-fitting nitrogen gas from the peripheral portion. The check valve can inject gas from the outside to the inside, but the injected gas does not leak from the inside to the outside. As the check valve, a known check valve can be used.

FIG. 15 is a cross-sectional explanatory view showing an angle α formed by the side seal portion 403 and the surface laminated body 402 at the time of opening, and FIG. 15 (a) shows a case where there is no overhanging shape portion. Shows the case where the overhanging shape portion 408 is present. It can be seen that the presence of the overhanging shape portion 408 halves the length of the side seal portion 403 that must be cut. In addition to this, when the angle α formed by the laminated body 402 and the seal portion 403 at the position where the cut of the seal portion 403 is completed and the storage portion 411 is completed is compared, in the case of FIG. 15 (a) without the overhanging shape portion. By comparison, it can be seen that α has an obtuse angle when the overhanging shape portion 408 is present. The easiest to cut is when α is 180 °, and the cut of the seal portion 403 enters the storage portion 411 without any resistance. When α is close to 90 ° as in the case of FIG. 15 (a), the cut of the seal portion 403 stops, but as in the case of FIG. 15 (b), the overhanging shape portion 408 By the presence of, α becomes obtuse, and it is possible to prevent the cut from stopping.

In FIG. 16, the value of the width W of the opening 409 is preferably 2 mm or more. If it is less than 2 mm, it may be blocked. Further, it is desirable that the width T of the constricted portion 410 is 2 mm or more. If it is less than 2 mm, the seal may retract due to internal pressure. The distance D between the notch 407 and the overhanging shape portion 408 is preferably 5 mm or more. If it is less than 5 mm, it may be cut during transportation. The vertical dimension of the overhanging shape portion 408 is preferably 10 mm or more. The lateral dimension of the overhang shape portion 408 is defined by the width of the seal portion and the dimension of the notch 407.

FIGS. 18 to 20 are explanatory views showing another embodiment of the pouch for a tennis ball according to the present invention. The example of FIG. 18 is a case where the overhanging portion shape is a triangle, and the example of FIG. 19 is an example where the overhanging portion shape is a rhombus. Further, the example of FIG. 20 is an example in which the shape of the overhanging portion is rectangular, the vertical dimension of the overhanging portion shape is equal to the width of the opening portion, and the constricted portion does not exist. As described above, the shape of the overhanging portion is not particularly limited.

The configuration of the laminated body 402 used for the tennis ball pouch 401 according to the present invention will be described. The basic configuration of the laminate 402 includes a base film / gas barrier film / sealant film, but the base film and the gas barrier film may be common. Further, in order to improve the overall strength, an intermediate layer can be added as appropriate.

Various synthetic resin films can be used as the base film constituting the laminated body 402. Specifically, stretched polypropylene resin (OPP), polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), polyethylene naphthalate resin (PEN), polymethylmethacrylate resin (PMMA), ionomer resin, nylon-6. , Nylon-66, polystyrene resin (PS), polyvinyl chloride resin (PVC), polyvinylidene chloride resin (PVDC), polycarbonate resin (PC) and other thermoplastic resin films can be used.

Examples of the gas barrier film include gas barrier films such as polyvinylidene chloride film, polyvinyl alcohol film, ethylene vinyl alcohol copolymer film, gas barrier nylon film, and gas barrier polyethylene terephthalate (PET) film, and metal such as aluminum in PET film and the like. A metal vapor-deposited film, a PET film on which an inorganic oxide such as aluminum oxide or silicon oxide is vapor-deposited, a polyvinylidene chloride coating, or a film containing a water-soluble resin and an inorganic layered compound. A gas barrier coating layer such as a resin layer made of a film obtained by reacting a metal alkoxide or a hydrolyzate thereof with an isocyanate compound can be used. Among them, an inorganic oxide-deposited film obtained by depositing an inorganic oxide such as aluminum oxide or silicon oxide on a PET resin film can be preferably used. It has been confirmed that aluminum foil, which is generally used as a gas barrier layer for packaging materials, may have fine cracks due to tension caused by internal pressure of the pouch.

As the sealant film, a polyolefin resin is generally used. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer. , Ethylene-based resins such as ethylene-methacrylic acid resin copolymers, blended resins of polyethylene and polybutene, homopolypropylene resins (PP), propylene-ethylene random copolymers, propylene-ethylene block copolymers, propylene- Polypropylene resin such as α-olefin copolymer is used.

As the intermediate layer, a synthetic resin film similar to the synthetic resin film used as the base film can be used. Each of these layers can be bonded using a dry laminating adhesive. Hereinafter, a more specific description will be given based on the examples.
<Example 5>
An inorganic vapor-deposited film (GL film manufactured by relief printing company) in which silicon oxide is vapor-deposited on a 12 μm-thick PET film substrate is used as a substrate film and a gas barrier film, and a 25 μm-thick nylon film is used as an intermediate layer. , And further, using an LLDPE film having a thickness of 120 μm as a sealant layer, these were dry-laminated to prepare a laminated body.

The two laminated bodies are opposed to each other with the sealant layer inside, and the peripheral edges other than the bottom seal portion 405 are heat-sealed, then two tennis balls are inserted, and the bottom seal portion 405 is heat-sealed as shown in FIG. A package was prepared. Nitrogen gas was sealed from the check valve to set the internal pressure to 0.1 MPa. The seal width of the side seal portion was 20 mm, the vertical dimension of the overhanging shape portion was 15 mm, the horizontal dimension was 10 mm, and the width W of the opening was 3 mm. The width T of the constricted portion was 2 mm, and the distance D between the notch and the overhanging shape portion was 5 mm. The package was evaluated for openability.
<Example 6>
A package was prepared in the same manner as in Example 5 except that the width W of the opening was 5 mm, and the openability was evaluated in the same manner.
<Example 7>
A package was prepared in the same manner as in Example 5 except that the width W of the opening was 10 mm, and the openability was evaluated in the same manner.
<Example 8>
A package was produced in the same manner as in Example 5 except that the shape of the overhanging shape portion was a rectangular shape as shown in FIG. 17, and the openability was evaluated in the same manner.
<Example 9>
A package was prepared in the same manner as in Example 8 except that the width W of the opening was 5 mm, and the openability was evaluated in the same manner.
<Example 10>
A package was prepared in the same manner as in Example 8 except that the width W of the opening was 10 mm, and the openability was evaluated in the same manner.

<Comparative Example 5>
A package was prepared in the same manner as in Example 5 except that the overhanging shape portion was not provided, and the openability was evaluated in the same manner.

<Comparative Example 6>
A package was prepared in the same manner as in Example 5 except that the width W of the opening was set to 1 mm, and the openability was evaluated in the same manner.

<Comparative Example 7>
A package was prepared in the same manner as in Example 5 except that the width W of the opening was set to 15 mm, and the openability was evaluated in the same manner.

<Comparative Example 8>
A package was prepared in the same manner as in Example 8 except that the width W of the opening was set to 1 mm, and the openability was evaluated in the same manner.

<Comparative Example 9>
A package was prepared in the same manner as in Example 8 except that the width W of the opening was set to 15 mm, and the openability was evaluated in the same manner.

The above results are summarized in the table shown in FIG.
From the results shown in FIG. 21, it was found that when the shape of the overhanging portion is shown in FIGS. 16 and 17, good results can be obtained if the width W of the opening portion is 3 mm to 10 mm.

(Fourth Embodiment)
Hereinafter, the pressurized pouch as the pressurized package according to the present invention will be described in detail with reference to the drawings. FIG. 22 is a plan explanatory view showing the structure of the pressure pouch 501 according to the present invention, the dimensions of each part, and the like. FIG. 23 is a schematic cross-sectional view showing the BB'cross section of FIG. 22, and is an explanatory view of the opening angle α. FIG. 24 is a schematic cross-sectional view showing the CC'cross section of FIG. 22, and is an explanatory view of the diameter D of the short side and the opening angle α when the deformed portion is not present.

The pressurized pouch 501 according to the present invention is a pressurized pouch for storing and storing the contents in a state of being pressurized to a pressure higher than the atmospheric pressure, and is a surface laminate 502 having a gas barrier layer and a sealant layer, respectively. And the sealant layers of the back surface laminated body 503 are opposed to each other, and the peripheral edge portion is heat-sealed to form the storage portion 510 and the sealing portion. In this example, the seal portions are formed on the four sides of the top seal portion 504, the side seal portions 505, 505, and the bottom seal portion 506. A three-way seal bag with only one side seal may be used.

In the example shown in FIG. 22, the check valve 509 is attached to the top seal portion 504. The check valve is a valve for storing contents such as a tennis ball in a pouch, heat-sealing the peripheral portion, and then press-fitting nitrogen gas from the peripheral portion. The check valve can inject gas from the outside to the inside, but the injected gas does not leak from the inside to the outside. As the check valve, a known check valve can be used.

The side seal portion 505 has a notch 507 that serves as an opening start portion, and an unsealed deformed portion 508 protruding from the storage portion 510 toward the notch 507 is formed between the notch 507 and the storage portion 510. ing. As shown in FIG. 23, in the pressure pouch according to the present invention, the angle formed by the front surface laminated body 502 and the back surface laminated body 503 at the point where the cut of the side seal portion 505 starting from the notch 507 reaches the deformed processed portion 508. It is characterized in that (opening angle α) is 100 ° or less.

FIG. 24 is a schematic cross-sectional view showing the CC'cross section of FIG. 22, and is an explanatory view of the diameter D of the short side. This is also an explanatory diagram of the opening angle α when the deformed processing portion 508 does not exist. In the absence of the deformed portion, the cross section of the pouch is substantially circular.

As is clear from the comparison between FIGS. 23 and 24, due to the presence of the deformed portion 508, the surface at the point where the cut of the side seal portion 505 starting from the notch 507 reaches the deformed portion 508 at the end of the seal portion. It can be seen that the angle formed by the laminated body 502 and the back surface laminated body 503, that is, the opening angle α, is clearly smaller than that in the case of FIG. 24.

The opening angle α is a value close to 180 ° when the deformed processing portion 508 does not exist, but it becomes a small value by providing the deformed processing portion. As a result of various studies, it was found that the opening property is good when the opening angle α is 100 ° or less.

If the opening angle α exceeds 100 °, there is a risk that the cut that has advanced through the seal portion will not advance when it reaches the storage portion.
25 and 26 are schematic enlarged plan views showing an example of the shape of the deformed processing portion 508. In the example of FIG. 25, the shape of the deformed portion 508 is close to half of the elliptical shape. In the example of FIG. 26, it is a rectangle. The shape of the deformed portion 508 is not particularly limited, and may be any shape as long as the opening angle α is 100 ° or less. 26 to 28 are enlarged plan schematic views showing an example of the shape of the deformed processing portion 508.

The configuration of the laminated body used for the pressurized pouch 501 according to the present invention will be described. The basic structure of the laminate is a base film / gas barrier film / sealant film, but the base film and the gas barrier film may be common. Further, in order to improve the overall strength, an intermediate layer can be added as appropriate.

Various synthetic resin films can be used as the base film constituting the laminate. Specifically, stretched polypropylene resin (OPP), polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), polyethylene naphthalate resin (PEN), polymethylmethacrylate resin (PMMA), ionomer resin, nylon-6. , Nylon-66, polystyrene resin (PS), polyvinyl chloride resin (PVC), polyvinylidene chloride resin (PVDC), polycarbonate resin (PC) and other thermoplastic resin films can be used.

Examples of the gas barrier film include gas barrier films such as polyvinylidene chloride film, polyvinyl alcohol film, ethylene vinyl alcohol copolymer film, gas barrier nylon film, and gas barrier polyethylene terephthalate (PET) film, and metal such as aluminum in PET film and the like. A metal vapor-deposited film, a PET film on which an inorganic oxide such as aluminum oxide or silicon oxide is vapor-deposited, a polyvinylidene chloride coating, or a film containing a water-soluble resin and an inorganic layered compound. A gas barrier coating layer such as a resin layer made of a film obtained by reacting a metal alkoxide or a hydrolyzate thereof with an isocyanate compound can be used. Among them, an inorganic oxide-deposited film obtained by depositing an inorganic oxide such as aluminum oxide or silicon oxide on a PET resin film can be preferably used. It has been confirmed that aluminum foil, which is generally used as a gas barrier layer for packaging materials, may have fine cracks due to tension caused by internal pressure of the pouch.

As the sealant film, a polyolefin resin is generally used. Specifically, low-density polyethylene resin (LDPE), medium-density polyethylene resin (MDPE), linear low-density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α-olefin copolymer. , Ethylene-based resins such as ethylene-methacrylic acid resin copolymers, blended resins of polyethylene and polybutene, homopolypropylene resins (PP), propylene-ethylene random copolymers, propylene-ethylene block copolymers, propylene- Polypropylene resin such as α-olefin copolymer is used.

As the intermediate layer, a synthetic resin film similar to the synthetic resin film used as the base film can be used. Each of these layers can be bonded using a dry laminating adhesive. Hereinafter, a more specific description will be given based on the examples.
<Example 11>
An inorganic vapor-deposited film (GL film manufactured by relief printing company) in which silicon oxide is vapor-deposited on a 12 μm-thick PET film substrate is used as a substrate film and a gas barrier film, and a 25 μm-thick nylon film is used as an intermediate layer. , And an LLDPE film having a thickness of 120 μm was used as a sealant layer, and these were dry-laminated using an adhesive to prepare a laminated body.

A pressure pouch was prepared by heat-sealing four circumferences of the laminate. At the lower part of the side seal portion, a deformed portion having a shape as shown in FIG. 27 and a notch are provided. The seal portion was diagonally increased at the corner portion, and the angle of the elliptical deformed portion was inclined along the diagonal seal portion. The opening width of the deformed portion is 30 mm, and the depth is 10 mm. A check valve was attached to the top seal. Air was injected into the pouch from the check valve so as to be 0.1 MPa, and the openability from the notch was evaluated. The opening angle α was 100 °.
<Example 12>
The shape of the deformed portion was changed as shown in FIG. 28, and the opening to the storage portion was narrowed. The opening width of the deformed portion is 20 mm, and the depth is 10 mm. Other than that, a pressure pouch was produced in the same manner as in Example 1. The opening angle α was 95 °.
<Example 13>
The shape of the deformed portion was changed as shown in FIG. 29 to form a constricted shape with a narrow opening to the storage portion. The opening width of the deformed portion is 3 mm, and the depth is 10 mm. The width of the elliptical deformed portion is 10 mm. Other than that, a pressure pouch was produced in the same manner as in Example 11. The opening angle α was 10 °.

<Comparative Example 10>
A pressure pouch was produced in the same manner as in Example 1 except that the deformed portion was not provided. The opening angle α was 140 °.

<Reference example>
When the deformed part is not provided and air is not injected. The opening angle α is 0 °. The above results are summarized in the table shown in FIG.

<Evaluation of openness>
⊚: When the seal is cut with the same force as the force to cut the seal from the notch.
〇: When it was not possible to cut open with the same force, but it was easy to cut.
△: A large amount of force is required, but if you manage to cut it.
×: When the seal cannot be cut because it is caught at the end point.

From this result, it can be seen that the openability is improved by providing the deformed processed portion.

Claims (16)

1. A pressurizing package that contains a gas-filled sphere while pressurizing it.
   A flexible sheet in which a storage space for accommodating the sphere is formed, and
   A communication portion formed on the sheet and communicating the accommodation space with the outside,
   A check valve provided in the communication portion is provided.
   The check valve is a pressurizing package that allows gas to be filled in the accommodation space through the check valve and regulates the gas filled in the accommodation space to escape to the outside.
2. The check valve includes a main body having a through hole, a plug for opening and closing the through hole, and a flexible member for connecting the main body and the plug.
   The plug is configured to open the through hole when the accommodation space is filled with gas, while closing the through hole after the accommodation space is filled with gas at a predetermined pressure. The pressurizing package according to 1.
3. The pressurizing package according to claim 1 or 2, wherein the sheet is made of a plurality of heat-sealable materials, and the accommodation space is formed by heat-sealing a predetermined sealing portion.
4. The sheet includes a main body portion and a planned separation portion.
   The pressurizing package according to claim 3, wherein the sealing portion has a notch for separating the main body portion and the planned separation portion.
5. The pressurizing package according to claim 4, wherein the sheet includes a chuck for opening and closing an opening formed by separating the planned separation portion from the main body portion.
6. The pressurizing package according to any one of claims 3 to 5, wherein the seal portion has a contact prevention seal portion that prevents the sphere housed in the storage space from coming into contact with the check valve.
7. The pressurizing package according to claim 6, wherein the contact prevention seal portion is configured to become wider as it approaches the check valve from the side seal portion provided along the side edge of the sheet.
8. The pressurizing package according to any one of claims 1 to 7, wherein the accommodation space is pressurized at a pressure in the range of 0.07 MPa or more and 0.2 MPa or less at 25 ° C.
9. The pressurizing package according to any one of claims 1 to 8, further comprising the sphere to be accommodated in the accommodation space.
10. A pressurizing package for storing and storing a sphere in a pressurized state.
    A pair of laminated bodies each having a gas barrier layer and a sealant layer, each of the sealant layers has a peripheral portion, and the pair of laminated bodies have the peripheral portions facing each other with the sealant layers facing each other. The pair of laminates, including a storage portion and a sealing portion formed by heat-sealing.
    A notch provided in the seal portion and serving as an opening start portion,
    An overhanging shape portion provided between the notch and the storage portion, wherein the overhanging shape portion is an unsealed portion protruding from the storage portion toward the notch. Pressurized packaging.
11. An opening is provided between the storage portion and the overhanging shape portion.
    The vertical dimension of the overhanging shape is longer than the width of the opening.
    The pressurizing package according to claim 10, wherein the portion of the seal portion forming the opening portion has a constricted portion that constricts the opening portion.
12. The pressurizing package according to claim 11, wherein the width of the constricted portion is 2 mm or more.
13. The pressurizing package according to claim 11 or 12, wherein the width of the opening is 2 mm or more.
14. A pressurizing package for storing and storing the contents in a state of being pressurized to a pressure higher than the atmospheric pressure.
    A front surface laminate and a back surface laminate having a gas barrier layer and a sealant layer, respectively, each of the sealant layers has a peripheral edge portion, and the front surface laminate and the back surface laminate are the sealant layers of each other. The front surface laminated body and the back surface laminated body, which include a storage portion and a sealing portion formed by heat-sealing the peripheral edges with each other in a state of facing each other.
    A notch provided in the seal portion and serving as an opening start portion,
    The deformed processing portion provided between the notch and the storage portion, and the deformed processing portion is an unsealed portion protruding from the storage portion toward the notch. Equipped with
    A pressurizing package in which the angle (opening angle α) between the front surface laminate and the back surface laminate at the point where the cut of the seal portion starting from the notch reaches the deformed processed portion is 100 ° or less.
15. When the diameter of the short side of the pouch under pressure is (D), the inner dimension of the long side of the pouch is (L), and the distance from the center of the long side of the pouch to the center of the deformed portion is (A). , A> D, the pressurizing package according to claim 14.
16. A flexible sheet in which a storage space for accommodating a sphere filled with gas is formed, a communication portion formed in the sheet and communicating the accommodation space with the outside, and a communication portion provided in the communication portion to accommodate the accommodation. Preparing a pre-pressurization package with a check valve that regulates the escape of gas filled in the space to the outside, and
    Accommodating the sphere into the accommodating space through the opening formed in the pressurizing package.
    Closing the opening of the pressurizing package and
    A method for manufacturing a pressurizing package, comprising filling the accommodating space of the pressurizing package with gas via a check valve to pressurize the accommodating space to a level equal to or higher than the internal pressure of the sphere.

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