JP2011006133A - Product packaged in distribution package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a distribution package which can prevent oxygen permeation from a lid in a higher level without damaging openability of the distribution package and provide an outer bag for hermetically packaging a product packaged in a distribution package which can prevent contamination and tampering in a distribution process and also can prevent a decrease of oxygen barrier properties of the distribution package itself of the product packaged in a distribution package.SOLUTION: In the product packaged in a distribution package formed of the distribution package filled with contents and the outer bag packaging the distribution package hermetically, a rigid lid constituting the distribution package is formed of a rigid composite sheet that a printing receiving layer, a rigid middle layer, and a lid seal layer are laminated in this order. The rigid middle layer has a polystyrene resin layer and an ethylene-vinyl alcohol copolymer resin layer arranged on the printing receiving layer side. The outer bag is formed of a film having an oxygen permeability of 2,000 ml/mday MPa or above.

Description

  The present invention relates to a product packed in a distribution package in which various liquids and pastes are filled in the distribution package, and relates to a product packed in a distribution package sealed in an outer bag.

  A distribution package that can push out filled contents (for example, liquid food such as jam, ketchup, dressing, etc.) by a simple operation of bending the lid with one hand and crushing it as it is is known (Patent Document 1). . In order to accommodate the contents in the lid of a hard material having a folding line provided with a half cut portion at the center of the surface and a projection that forms a discharge port when folded when in use. The container of the flexible member is fused so that the pocket portion is formed. Specific examples of the hard material constituting the lid include polyethylene, polyethylene terephthalate, and polystyrene copolymer.

  However, these synthetic resins mentioned as specific examples cannot be said to have sufficient oxygen barrier properties, and there is a concern that the contents of the distribution package may be oxidized and deteriorated by oxygen permeating from the lid. was there.

  Therefore, in order to prevent oxygen permeation from the lid, an ethylene-vinyl alcohol copolymer resin (EVOH) layer having a thickness of 2 to 15 μm showing a good oxygen barrier property and a polystyrene resin (PS) showing a good opening property are used. It has been proposed to use in combination with a layer (Patent Document 2). In this case, when forming a fold line by providing a half-cut portion from the surface side of the lid, in order not to impair the oxygen barrier property of the EVOH layer, the PS layer on the surface side of the lid and the content side The EVOH layer is arranged and designed so that the half cut does not reach the EVOH layer.

  In addition, the product packed in such a package by actually filling the package with liquid food etc. is good for preventing contamination and mischief in the distribution process and avoiding the influence of oxygen from the outside world. It is distributed in the market after being hermetically packaged in an outer bag formed from a silica vapor-deposited packaging film or an aluminum vapor-deposited packaging film that exhibits a good oxygen barrier property.

Japanese Patent No. 3140016 JP 2006-35449 A

  However, the distribution package disclosed in Patent Document 2 certainly has a good opening property and can prevent oxygen permeation from the lid to some extent. When left for a period of time, there was a problem that the quality of the contents deteriorated due to oxygen. For this reason, it is required to prevent oxygen permeation from the lid of the distribution package at a higher level.

  In addition, when a product packed in a distribution package is sealed and packaged in an outer bag, contamination and mischief in the distribution process can be prevented, but such an outer bag is used even though an outer bag showing good oxygen barrier properties is used. When comparing the distribution package of a product packed with a distribution package that is hermetically packaged in an outer bag with the distribution package of a product packed with a distribution package that is not hermetically packaged, the former oxygen barrier property is There is a new problem beyond expectations that it may be lower than For this reason, in addition to preventing contamination and mischief in the distribution process, the outer bag for hermetically wrapping the product packed in the distribution package also prevents oxidative deterioration of the contents filled in the product packed in the distribution package In order to be able to do so, it is required not to lower the oxygen barrier property of the distribution package itself.

  An object of the present invention is to solve the above-described problems of the prior art, and has a folding line provided with a half-cut portion at the center of the surface, and a protrusion that forms a discharge port when folded. In the distribution package body having a structure in which the container body of the flexible member is fused so that the pocket portion for containing the contents is formed in the lid of the hard material having the It is to be able to prevent oxygen permeation from the lid at a higher level. Furthermore, for the outer bag for hermetically wrapping the packaged product packed with the contents packed in such a packaged package, not only the contamination and mischief in the distribution process is prevented, but also the product packed in the packaged package. This is to prevent the oxygen barrier property of the distribution package itself from being lowered.

  The inventors of the present invention make the layer thickness of the EVOH layer constituting the lid of the distribution package thicker than 15 μm of Patent Document 2 on the assumption that the oxygen barrier property is improved if the layer thickness of the EVOH layer is increased. Tried. However, if the EVOH layer is thicker than 15 μm, when the lid is bent, the EVOH layer is stretched and the half-cut portion is not cracked, and the openability is adversely impaired, so that it cannot be used as a distribution package. I faced the problem. For this reason, when the positional relationship between the PS layer and the EVOH layer is reversed and the PS layer is arranged on the contents side, the EVOH layer is unexpectedly formed although a half-cut portion is formed. It has been found that the oxygen barrier property of the lid of the distribution package is improved and that the half-cut portion is formed in the EVOH layer, so that the opening property of the distribution package is not lowered.

  In addition, the present inventors have recognized that sealed packaging in an outer bag is indispensable in order to prevent contamination and mischief in the distribution process for products packed in packaged packaging. As a result of research on the relationship between the oxygen barrier property of the distribution package itself and the packaged product packed in a sealed package, surprisingly, it was not conventionally used to seal the package of the packaged package. Although the reason is not clear by using an outer bag having a low oxygen barrier property, the present inventors have found that the oxygen barrier property of the distribution package itself cannot be lowered contrary to expectation, and the present invention has been completed.

That is, the present invention accommodates a hard lid having a folding line having a half-cut portion formed from the surface side at the center of the surface and a protrusion that forms a discharge port when folded, and the contents. A distribution packaging body having a flexible container body having a pocket portion, and a peripheral edge portion of the flexible container body fused to the back surface of the hard lid;
A liquid or paste-like material housed as contents in the pocket portion of the flexible container of the distribution package;
In a product packaged with a distribution package having an outer bag in which a distribution package containing a liquid or paste-like material is sealed and packaged,
The hard lid is formed of a hard composite sheet obtained by laminating a print receiving layer, a hard intermediate layer, and a lid seal layer to be the back of the hard lid in this order, and has a thickness of 250 μm or more and 700 μm or less. And
The hard intermediate layer has an ethylene-vinyl alcohol copolymer resin layer and a polystyrene resin layer having a thickness of 150 μm or more and 500 μm or less,
At least the ethylene-vinyl alcohol copolymer resin layer is disposed closer to the print receiving layer than the polystyrene resin layer,
The outer bag is formed from a film having an oxygen permeability of 2000 ml / m ² · day · MPa or more.

  The hard lid constituting the distribution package body of the product packed in the distribution package body sealed and packaged in the outer bag according to the present invention comprises the lid layer sealing layer to be the back surface of the print receiving layer, the rigid intermediate layer and the rigid lid body. It is formed from a hard composite sheet that is laminated in order, and the hard intermediate layer includes a polystyrene resin layer, and an ethylene-vinyl alcohol copolymer resin layer disposed closer to the print receiving layer than the polystyrene resin layer. Have. Therefore, the oxygen barrier property of the hard lid is improved as compared with the case where the polystyrene resin layer is disposed closer to the print receiving layer than the ethylene-vinyl alcohol copolymer resin layer. Moreover, since the ethylene-vinyl alcohol copolymer resin layer itself is cut by half-cutting, even if the thickness is increased, the openability of the distribution package is not lowered.

Moreover, since the outer bag for hermetically wrapping the product packed in the distribution package is made of a film having an oxygen permeability of 2000 ml / m ² · day · MPa or more, it is possible to prevent contamination and mischief in the distribution process for the product packed in the distribution package. When the product packed in the distribution package is hermetically packaged, the oxygen barrier property of the distribution package itself can be prevented from being lowered.

It is a perspective view of the distribution packaging body used for the distribution packaging body packing product of this invention. It is sectional drawing of the hard composite sheet for forming the hard cover body of the distribution packaging body used for the distribution packaging body packing product of this invention, Comprising: A half cut part is provided. It is sectional drawing of the flexible composite film for forming the flexible container body of the distribution packaging body used for the distribution packaging body packing product of this invention. It is sectional drawing of the flexible composite film for forming the flexible container body of the distribution packaging body used for the distribution packaging body packing product of this invention. It is a perspective view of the distribution packaging body stuffed product with which the content was filled in the distribution packaging body. It is a perspective view of the distribution packing body stuffed product sealed-packed by the outer bag of this invention.

  Hereinafter, a product packaged with a distribution package of the present invention will be described with reference to the drawings.

  The product packaged with the distribution package according to the present invention is a product packaged with the distribution package (400 in FIG. 5) in which the contents are filled in the distribution package and sealed in the outer bag (26 in FIG. 6). Here, as shown in FIG. 1, the distribution package 100 is composed of a hard lid 10 and a flexible container 20, and the hard lid 10 is formed at the center of the surface 11 from the surface side. It has a fold line 12 having a formed half-cut portion and a protrusion 13 that forms a discharge port when folded. The appearance shape of the distribution package used in the present invention may be the same as the appearance shape of a conventional distribution package.

  Here, the “hard” of the hard lid body 10 is relatively harder than the flexible container body 20, the distribution packaging body 100 can be pinched with a finger and folded along a folding line, and the protrusion 13 is opened. It means the hardness that can be. Further, “flexibility” of the flexible container body 20 indicates that it is relatively more flexible than the hard lid body 10 and is bent when the distribution packaging body 100 is pinched with a finger and folded along a folding line. It means that it deform | transforms so that it can discharge from the protrusion 13 which was crushed by the press of the hard lid body 10 and opened the contents.

  The “center portion” of the surface 11 of the hard lid 10 is, for example, a region including a line connecting the midpoints of the opposing long sides when the hard lid 10 is rectangular, and is a square. Is a region including a line connecting the midpoints of opposite sides or a region including one diagonal line, in the case of a diamond, a region including a short diagonal line, and in the case of a circle, the center of the circle In the case of an ellipse, it is a region including a straight line that passes through the center of the major axis and is perpendicular to the major axis, but is not limited thereto.

  As shown in FIG. 2, the hard lid 10 is formed from a hard composite sheet 200 in which a print receiving layer 14, a hard intermediate layer 15, and a lid seal layer 16 to be the back surface of the hard lid 10 are laminated in this order. Has been. The hard intermediate layer 15 includes a polystyrene resin layer (PS layer) 15a and an ethylene-vinyl alcohol copolymer resin layer (EVOH layer) 15b. The half cut part 17 is formed from the surface side of the hard lid 10, and extends beyond the EVOH layer 15b to the PS layer 15a. That is, at least the EVOH layer 15b is disposed closer to the print receiving layer 14 than the PS layer 15a. In addition, an arbitrary resin layer can be sandwiched between the PS layer 15a of the hard intermediate layer 15 and the lid sealing layer 16 within a range that does not impair the effects of the present invention such as openability.

  Further, the flexible container body 20 has a pocket portion 21 for storing contents such as food, and a peripheral portion (not shown) of the flexible container body 20 is melted on the back surface of the hard lid body 10. It is worn. The flexible container body 20 forming the pocket portion 21 is provided, for example, one across the fold line 12, one on each side of the fold line 12, or a plurality of others, depending on the purpose of use of the distribution package 100. be able to. Further, the pocket portions 21 on both sides of the folding line 12 may be communicated.

  As shown in FIG. 3, such a flexible container body 20 is formed by laminating a surface protection layer 22, an oxygen barrier layer 23, and a container body seal layer 24 that contacts the contents and is to be welded to the hard lid body 10 in this order. The flexible composite film 300 is formed. As shown in FIG. 4, the oxygen barrier layer 23 includes an oxygen barrier outer layer 23a on the surface protective layer 22 side and an oxygen barrier inner layer 23b on the container seal layer 24 side with the intervening layer 23c interposed therebetween. May be. By making the oxygen barrier layer 23 into multiple layers, the oxygen barrier property can be further improved.

  In addition, the meaning of a half cut is synonymous with the conventional meaning. The half cut portion 17 can be formed by a known half cut device as disclosed in, for example, Japanese Patent Application Laid-Open No. 2001-328095. In the present invention, the PS layer 15a is cut from the print receptive layer 14 side of the hard lid 10, and in order to achieve good opening properties, it is usually 10 from the surface layer side of the entire thickness of the PS layer 15a. It is preferable to cut to a depth of ~ 90%.

  The protrusion 13 is preferably provided on the folding line 12 provided with the half-cut portion 17, and one or a plurality of protrusions 13 may be provided depending on the purpose of use of the distribution package 100. The shape of the protrusion 13 is opened from the apex of the protrusion 13 by turning the hard lid 10 of the distribution package 100 downward and pinching both ends with fingers around the folding line and bending it into a V shape. Any shape can be used. For example, as shown in FIG. 1, it may be a ridge band shape, a triangular pyramid shape, a quadrangular pyramid shape, or a semicircular sphere shape. The protrusion 13 can be usually formed by heat-deforming by a mold forming method after the half cut process.

  The thickness of the hard lid 10 can be the same as the thickness range of the lid normally used as the lid of the distribution package, specifically 250 μm to 700 μm, preferably 250 μm to 500 μm. . In this way, the product as a distribution package is provided with an appropriate sheet stiffness and tactile sensation without impairing the good opening as the lid of the distribution package 100 and the moldability of the hard composite sheet 200. Can hold value.

  Next, the print receiving layer 14, the hard intermediate layer 15, and the lid seal layer 16 that should be the back surface of the hard lid 10 constituting the hard lid 10 will be described in detail (FIG. 2).

  The print receiving layer 14 constituting the hard lid 10 is a layer disposed on the outer side of the hard lid 10 (the side opposite to the flexible container body 20), and print ink is applied by a gravure printing method or a flexographic printing method. It is a layer that receives and forms a printed layer. In addition, this layer also has a function of protecting the hard intermediate layer 15. Such a print receiving layer 14 can be comprised from the thermoplastic resin layer which shows favorable printability and printing stability, and it is preferable to have the polyester resin layer which is especially excellent about those characteristics especially. Usually, the print receiving layer 14 comprises a single polyester resin layer, but two or more polyester resin layers of the same kind or different kinds may be laminated by a dry lamination method or a coextrusion method.

  The polyester resin layer can be the same as that used in conventional distribution packages, for example, 5 mol of 1,4-cyclohexanedimethanol component in 100 mol% of polyhydric alcohol component. %, Preferably 10 to 50 mol%, more preferably 15 to 45 mol% of amorphous copolyester resin can be used. In this case, if the 1,4-cyclohexanedimethanol component is too small, it is difficult to increase the degree of amorphousness of the copolyester resin, while if it is too large, the impact strength of the film tends to decrease. is there.

  In consideration of the heat resistance and printing characteristics of the hard lid 10, the ethylene terephthalate unit is preferably 50 mol% or more, more preferably 60 mol% or more in 100 mol% of the unit constituting the polyester resin. To do. On the other hand, the terephthalic acid component is preferably 50 mol% or more in 100 mol% of the polyvalent carboxylic acid component, and the ethylene glycol component in 100 mol% of the polyhydric alcohol component is preferably 50 to 95 mol%, more preferably 60 to 90 mol%.

  Examples of the polyhydric alcohols constituting the polyhydric alcohol component include 1,3-propanediol, triethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol and ethylene glycol. , 6-hexanediol, 3-methyl-1,5-pentanediol, neopentyl glycol, 2-methyl-1,5-pentanediol, 2,2-diethyl-1,3-propanediol, 1,9-nonane Alkylene glycol such as diol, 1,10-decanediol, trimethylolpropane, glycerin, pentaerythritol, diethylene glycol, dimer diol, polyoxytetramethylene glycol, polyethylene glycol, bisphenol compound or alkylene oxide thereof Such as the addition product can also be used in combination.

  As the polyvalent carboxylic acids constituting the polyvalent carboxylic acid component, aromatic dicarboxylic acids, ester-forming derivatives thereof, aliphatic dicarboxylic acids and the like can be used in addition to the above-mentioned terephthalic acid and esters thereof. Examples of the aromatic dicarboxylic acid include isophthalic acid, naphthalene-1,4-dicarboxylic acid, naphthalene-2,6-dicarboxylic acid, and 5-sodium sulfoisophthalic acid. Moreover, derivatives of these aromatic dicarboxylic acids and terephthalic acids include derivatives such as dialkyl esters and diaryl esters. Examples of the aliphatic dicarboxylic acid include glutaric acid, adipic acid, sebacic acid, azelaic acid, oxalic acid, succinic acid and the like, and an aliphatic dicarboxylic acid usually called dimer acid.

  The thickness of the print receiving layer 14 (usually a polyester resin single layer) may be in the range of the thickness of the print receiving layer normally used as the hard lid 10 of the distribution package 100. Is too thin, the surface strength of the hard composite sheet 200 for forming the hard lid 10 of the distribution package 100 is lowered, and there is a concern that the print layer may be peeled off together with the print receiving layer 14. When the thickness of the receiving layer 14 is too thick, it tends to be difficult to adjust the half cut to be put in the PS layer 15a, and is preferably 10 μm or more and 50 μm or less, more preferably 10 μm or more and 40 μm or less.

  The hard intermediate layer 15 constituting the hard lid 10 is a layer for imparting an oxygen barrier property and good opening to the hard lid 10, and has a PS layer 15a and an EVOH layer 15b from the contents side. In addition, other thermoplastic resins such as an adhesive resin can be appropriately added to the EVOH layer 15b as necessary as long as the function is not lost. As the adhesive resin, for example, an olefin copolymer having a carboxyl group is preferable, and in particular, an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, a maleic anhydride-modified polyethylene and the like are combined with the polyolefin resin layer. Suitable for bonding. The addition amount of the adhesive resin added to the EVOH layer 15b as a range that does not lose the gas barrier property is preferably 20 wt% or less.

  The PS layer 15 a is a layer that imparts strength and openness to the hard lid 10. As the PS constituting the PS layer 15a, PS used in a conventional distribution package can be used. Specifically, general-purpose polystyrene (hereinafter referred to as “GPPS”), impact-resistant polystyrene ( In the following, it is referred to as “HIPS”), a single product of styrene / butadiene block copolymer (butadiene-based compound), or a blend thereof. Here, GPPS does not contain a rubber component, and has a characteristic that it is extremely fragile. On the other hand, since HIPS is blended with a rubber component, it has a property that it is difficult to break. Therefore, by appropriately controlling the blend ratio of GPPS and HIPS, it is possible to adjust the cracking property generated in the lid when opening the package. The blending ratio of GPPS and HIPS is preferably 10:90 to 80:20, more preferably 10:90 to 70:30 in terms of mass ratio.

  The thickness of the PS layer 15a can be the same as the thickness range of the PS layer normally used for the lid of the distribution package, and if it is too thin, a good opening is obtained when used as the lid of the distribution package 100. Therefore, it is usually 150 μm or more and 500 μm or less, and preferably 200 μm or more and 400 μm or less. In addition, since the preferable thickness of the hard composite sheet 200 for forming the hard lid 10 is 250 μm or more and 700 μm or less, the PS layer 15 a is a main constituent layer in the hard composite sheet 200.

  In addition, since the PS layer 15a also adjusts the cracking property generated in the hard lid 10, in the distribution package 100 having the fold line 12 provided with the half-cut portion 17, the half-cut portion 17 is usually disposed on the surface layer. When forming the PS layer 15a from the side, it is preferable to make a cut until the depth of the half-cut portion 17 is 10 to 90% from the print receiving layer 14 side of the PS layer 15a.

  The EVOH layer 15b is a layer that exhibits oxygen barrier properties. The EVOH layer 15b is laminated on the PS layer 15a by a dry lamination method, a coextrusion method, or the like. As described above, since the half cut reaching the PS layer 15a from the print receiving layer 14 side is formed, the EVOH layer 15b itself is cut in the thickness direction by the half cut portion 17. Therefore, the EVOH layer 15 b does not participate in cracks that occur when the distribution package 100 is opened. Therefore, the thickness of the EVOH layer 15b can be made thicker than before (5 to 15 μm thick) to improve the oxygen barrier property of the hard lid 10. However, even if it is too thick, an oxygen barrier property commensurate with it can be obtained. Therefore, the thickness of the EVOH layer 15b disposed on the print receiving layer side is preferably more than 15 μm and 50 μm or less, more preferably more than 15 μm and 40 μm or less.

  The EVOH constituting the EVOH layer 15b preferably has an ethylene content of 29 to 47 mol%, more preferably 32 to 44 mol%, and preferably has a saponification degree of 90 mol% or more. More than 95 mol% is more preferable.

  The lid sealing layer 16 to be the back surface of the hard lid 10 is for welding with the flexible container 20 described later, and has the same configuration as the sealing layer of the lid of the conventional distribution package. It is preferably formed from a polyolefin resin, preferably polyethylene (PE). In this case, the polyolefin resin layer may be composed of two or more layers of the same type or different types. Specifically, when the lid seal layer 16 is formed from a PE layer, a multilayer structure of a PE outer layer on the contents side and a PE inner layer on the inner side may be used. As the PE layer having such a two-layer structure, low density polyethylene (LDPE), high density polyethylene (HDPE), or a blend of LDPE and HDPE can be used.

  When using a blend of LDPE and HDPE as the lid seal layer 16, the blend ratio should be determined in consideration of the layer thickness and the properties required for each of the PE outer layer and PE inner layer. Is preferred. That is, since the PE outer layer is located on the content side of the lid seal layer 16, it is necessary to ensure a sealing property with the flexible container body 20 and an appropriate opening property. Higher is preferred. On the other hand, the PE inner layer needs to propagate the “cut” of the layer (film) with the crack of the PS layer 15a of the hard intermediate layer 15, and therefore, the HDPE blending ratio should be increased. Is preferred. In general, the mixing ratio of LDPE and HDPE is 40:60 to 80:20, preferably 50:50 to 80:20, and more preferably 60:40 to 80:20 by mass ratio. By adopting such a configuration, the blending ratio of LDPE and HDPE can be freely controlled to adjust the cracking property generated in the lid when opening the distribution package 100 and the adhesive strength with the PS layer 15a. be able to. Also, by blending the two, it is possible to increase the melt tension by LDPE, to stabilize the film forming property, and to obtain a lid body that is easy to open at the time of opening by HDPE.

  LDPE having a density of 0.92 or more is preferable, and HDPE having a density of 0.95 or more is preferably used. By increasing the density, it is possible to impart good tearability to the PE layer.

  If the thickness of the lid seal layer 16 is too thin, it will be difficult to achieve good sealing properties, and if it is too thick, it will be difficult to achieve good cutting at the time of opening, so it is preferably 10 μm or more and 40 μm or less. is there. In particular, when the lid seal layer 16 is composed of a PE outer layer and a PE inner layer, each thickness is preferably 5 μm or more and 20 μm or less. As a result, it is possible to maintain a good sealing property while maintaining a good cut at the time of opening.

  The hard composite sheet for forming the hard lid 10 described above and the flexible container body 20 described later can be manufactured by a dry laminating method, a coextrusion method, or a method combining these. Moreover, when adhering the front and back layers by the co-extrusion method, if the front and back resin layers are difficult to adhere, an appropriate one can be selected from various adhesive resins according to the material to be bonded.

  Moreover, the hard cover 10 performs, for example, a half cut treatment on the hard composite sheet 200 according to a conventional method, and the protruding portion 13 where stress is concentrated when bent by male-female mold molding at a temperature of 170 to 220 ° C. It can be manufactured by forming and cutting into individual hard lids 10 as necessary. In addition, it may be put into the manufacturing process of the distribution package 100 in the form of a sheet or a plurality of pieces connected, and may be cut at the end.

  As already described, the flexible composite film 300 for forming the flexible container body 20 constituting the distribution package 100 used in the present invention has a surface protective layer 22, an oxygen barrier layer as shown in FIG. 23 and a container seal layer 24 to be disposed on the hard lid 10 side.

  The thickness of the flexible composite film 300 constituting the flexible container body 20 can be the same as the thickness of the flexible composite film for forming the flexible container body of the conventional distribution package, Usually, since the composite film is deep-drawn by thermoforming to form the pocket portion, the film strength and formability are taken into consideration, and the thickness is preferably 100 μm or more and 300 μm or less, more preferably 150 μm or more and 250 μm.

  The surface protective layer 22 constituting the flexible composite film 300 protects the contents from external stress, and can be formed from a thermoplastic resin having excellent stretchability and excellent film strength. As such a thermoplastic resin, a polyolefin resin such as a polypropylene resin can be used, but a polyamide resin having an oxygen barrier property and an excellent film strength as compared with the polyolefin resin can be preferably used.

  Examples of polyamide resins include aliphatic polyamides such as nylon 6, nylon 6-6, nylon 6-10, nylon 11, nylon 12, nylon 6-12, nylon 4-6; nylon 6/6, nylon 6/6, 10 An aliphatic polyamide such as nylon 6/6, 12; polyhexamethylenediamine terephthalamide; polyhexamethylenediamine isophthalamide; aromatic polyamide such as xylene group-containing polyamide can be used. Of these, nylon 6 and nylon 6-6 can be preferably used.

  If the thickness of the surface protective layer 22 is too thin, the flexible container 20 is easily broken, and if it is too thick, the performance corresponding to the thickness is not obtained, and is preferably 10 μm or more and 30 μm or less.

  The oxygen barrier layer 23 constituting the flexible composite film 300 can be made of a thermoplastic resin having an oxygen barrier ability, a silicon oxide vapor deposition film, an aluminum foil, or the like. However, in the present invention, the material cost is low, and the contents It is preferable that the EVOH layer is excellent in visibility and molding processability. As EVOH which forms an EVOH layer, the thing similar to what was demonstrated with the hard cover body 10 can be used.

  Further, even when the oxygen barrier layer 23 is formed as a multi-layer as shown in FIG. 4, both the oxygen barrier outer layer 23a on the surface protective layer 22 side and the oxygen barrier inner layer 23b on the container seal layer 24 side are formed. An EVOH layer (that is, an EVOH outer layer and an EVOH inner layer, respectively) is preferably used.

  The EVOH can be used by appropriately selecting from the same ones described for the hard lid 10.

  If the thickness of the oxygen barrier layer 23 is too thin, it will be difficult to obtain the desired oxygen barrier property, and if it is too thick, the moldability will deteriorate, so it is preferable when a thermoplastic resin having an oxygen barrier ability is used. Is 30 μm or more and 100 μm or less.

  When the oxygen barrier layer 23 is made of a thermoplastic resin having an oxygen barrier ability such as EVOH, it is preferable to contain an oxygen absorbing resin in order to improve the oxygen barrier property. Accordingly, as a preferred embodiment of the oxygen barrier layer 23, an EVOH layer containing an oxygen absorbing resin can be exemplified.

  As the oxygen-absorbing resin, a known oxygen-absorbing resin can be used, and a thermoplastic resin having a carbon-carbon double bond, a polyolefin resin, particularly a polyolefin resin having a tertiary carbon atom in the main chain, polyamide Oxidizing property that reacts with oxygen in the air and develops oxygen absorption ability in the presence of an oxidation catalyst such as a reaction product of polyamide and polyamide-reactive oxidizable polydiene or oxidizable polyether or a mixture thereof Resin, preferably a resin containing a hydrolysis condensate of a silane compound in which an organic group having at least one group selected from a halogen atom, an alkoxy group, a mercapto group and a hydroxyl group is bonded to a silicon atom which is a metal atom Can do.

  As the oxygen-absorbing resin, a resin to which various known additives, colorants, heat and weathering agents, antistatic agents, oxidation catalysts, and the like are added may be used as long as the effects of the present invention are not impaired. . In particular, in order to improve the oxygen absorption performance of the oxygen-absorbing resin, it is preferable to add a transition metal salt as an oxidation catalyst in a range of 5000 ppm or less by metal atomic weight. Transition metal salts that can be used for this purpose include, for example, cobalt, iron, nickel, as well as inorganic, organic or complex salts of transition metals such as copper, titanium, chromium, manganese, ruthenium, in particular carboxylates, Organic salts such as sulfonates are preferred, and specific examples include acetate, stearate, propionate, hexanoate, octanoate, neodecanoate and the like.

  The amount of the oxygen-absorbing resin to be added to the oxygen barrier layer 23 is preferably 5 to 50 wt% in consideration of the oxygen absorption, the film forming property of the flexible composite film, the filling property into the pocket portion, and the like. Preferably it is 5-30 wt%.

  In addition, another thermoplastic resin such as an adhesive resin can be appropriately added to the oxygen barrier layer 23 as necessary as long as the function is not lost. As the adhesive resin, for example, an olefin copolymer having a carboxyl group is preferable, and in particular, an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, a maleic anhydride-modified polyethylene and the like are combined with the polyolefin resin layer. Suitable for bonding. The addition amount of the adhesive resin added to the oxygen barrier layer 23 is preferably 20 wt% or less as long as the gas barrier property is not lost.

  As already described, the oxygen barrier layer is sandwiched between the oxygen barrier outer layer 23a on the surface protective layer 22 side and the oxygen barrier inner layer 23b on the container body seal layer 24 side as shown in FIG. You may comprise from the interposed layer 23c made. Thereby, the oxygen barrier property is better than that of the EVOH single layer. In this case, the oxygen barrier layer 23 (FIG. 4) having a multilayer structure is 50% or less from the outer surface of the surface protective layer 22 with respect to the total thickness of the flexible composite film 300 (the place farthest from the outer surface), Preferably it is 45% or less. In consideration of delamination between the surface protective layer 22 and the oxygen barrier layer 23, the oxygen barrier layer 23 is 5% or more from the outer surface of the surface protective layer 22 with respect to the thickness of the flexible composite film 300 (from the outer surface). It is preferable that the closest location.

  In the case where the oxygen barrier outer layer 23a and the oxygen barrier inner layer 23b of the oxygen barrier layer 23 (FIG. 4) having a multilayer structure are formed of a thermoplastic resin (preferably EVOH) having an oxygen barrier capability, Both the outer layer 23a and the oxygen barrier inner layer 23b can contain an oxygen-absorbing resin, but if the oxygen-barrier inner layer 23b contains an oxygen-absorbing resin, the content to be filled is derived from the oxygen-absorbing resin. Since there is a concern that a strange odor will migrate, it is preferable to blend 10% by mass or less of the oxygen-absorbing resin in the oxygen barrier inner layer 23b. In particular, the oxygen-absorbing resin is blended only in the oxygen barrier outer layer 23a. It is preferable.

  In the embodiment of FIG. 4, it is preferable that the thickness of the EVOH outer layer 23a in the oxygen barrier layer 23 is larger than the thickness of the EVOH inner layer 23b. Thereby, the penetration | invasion of oxygen from the outer surface of the surface protective layer 22 to the contents can be inhibited efficiently.

  The intervening layer 23c can be appropriately selected from those that can be used for the surface protective layer 22 constituting the flexible composite film 300. Among the thermoplastic resins having excellent stretchability and excellent film strength. Polyamide resins can be particularly preferably used.

  If the thickness of the intervening layer 23c is too thin or too thick, it will be difficult to realize a good oxygen barrier property, so it is preferably 1 to 20%, more preferably 5 to 5% of the thickness of the flexible composite film. The thickness is 15%.

  The container body seal layer 24 is a layer which is an inner wall of the pocket portion 21 and is welded to the back surface of the hard lid body 10. The seal layer of the flexible container body of the conventional distribution package body and the hard lid material 10 The structure can be the same as that of the lid sealing layer 16, and preferably comprises at least one PE layer. As a preferable PE layer, LDPE can be used to ensure sealing performance.

  The flexible composite film 300 for forming the flexible container body 20 described above can be manufactured by a dry laminating method, a coextrusion method, or a method combining these. Moreover, when adhering the front and back layers by the co-extrusion method, if the front and back resin layers are difficult to adhere, an appropriate one can be selected from various adhesive resins according to the material to be bonded.

  The flexible container body 20 is manufactured by forming a pocket portion of the flexible composite film 300 by deep drawing according to a conventional method, and cutting into individual flexible container bodies 20 as necessary. Can do. As the deep drawing process, for example, after the flexible composite film 300 is heated by contacting with a hot plate, it is generally performed by a method of compressed air or vacuum forming. As heating temperature, it is 100-170 degreeC. In addition, it may be put into the manufacturing process of the distribution package 100 in the form of a film or a plurality of pieces connected, and may be cut at the end.

  The distribution package 100 used in the present invention is prepared by preparing the hard lid 10 and the flexible container 20 described above, filling the pocket portion 21 of the flexible container 20 with the contents, and then adding flexibility. The peripheral part of the container body sealing layer 24 of the container body 20 can be manufactured by heat-sealing the back surface of the hard lid body 10 and cutting into individual distribution packaging bodies 100 as necessary.

  The distribution package body-packed product (400 in FIG. 5) hermetically packaged in the outer bag of the present invention is a product in which the pocket portion of the distribution package body 100 is filled with a liquid or paste-like material. Specific examples of the distribution package body-packed product include a distribution package body-packed food, a distribution package body-packed skin and hair cosmetic, a distribution package body-packed pharmaceutical, and the like according to the filling described below.

  The liquid or paste-like material 25 to be filled can be preferably used as long as it contains components whose quality is easily deteriorated by oxygen. For example, sauce, tartar sauce, dressing, jam, mayonnaise, ketchup, kneading Liquid or pasty foods such as eggplant, mustard, sauce, etc., creams, emulsions, lotions, cosmetics, shampoos, rinses, conditioners, hair dyes, whitening cosmetics, cosmetic oils, etc. Liquid pharmaceuticals. In particular, liquid food is suitable because the quality is easily deteriorated by oxygen. In addition, the liquid or paste-like material may contain ingredients such as vegetables in the case of a solid material, for example, a liquid food, within a range that does not impair the discharge of the contents by folding the distribution package 100.

  The distribution package body in FIG. 1 and the product packaged in the distribution package body in FIG. 5 have a hard lid facing downward, pinched both ends with fingers around the folding line, and bent into a V shape to open the protrusion. Thus, the discharge port can be formed, and the contents can be discharged from the discharge port to the outside of the distribution package.

  As shown in FIG. 6, a product 500 packed with a distribution package body sealed and packaged in an outer bag according to the present invention is distributed as shown in FIG. 5 in which the distribution package body 100 in FIG. 1 is filled and sealed with a liquid or paste-like material. The packaged product 400 is hermetically packaged in the outer bag 26. In the outer bag 26, one or several to several tens can be sealed and packaged depending on the sales form.

The outer bag 26 used in the present invention has an oxygen permeability of 2,000 ml / m ² · day · MPa when measured by the method defined in the JIS K 7126 B method under the conditions of a temperature of 25 ° C. and a humidity of 60%. As described above, it is preferably composed of a single layer or a return layer film of 4,000 ml / m ² · day · MPa or more. When the oxygen permeability is 2,000 ml / m ² · day · MPa or less, even if a distribution package having excellent oxygen barrier properties is used, the oxygen barrier property of the distribution package itself is lowered, and the contents are stored. This is not preferable because of the concern that the oxidative degradation may be deteriorated. On the other hand, in the present invention, the upper limit of the oxygen permeability of the outer bag is not particularly specified, but if the oxygen permeability is too high, the thickness of the film becomes thin, and the outer bag easily breaks in the distribution process. An outer bag made of a film of 30,000 ml / m ² · day · MPa or less is preferred.

  The material of the outer bag used in the present invention is not particularly limited as long as it is a film material capable of obtaining the oxygen permeability. For example, stretched polypropylene (OPP), unstretched polypropylene (CPP), and low density polyethylene (LDPE). , Linear low density polyethylene (LLDPE), high density polyethylene (HDPE), polycarbonate (PC), polystyrene (PS), ethylene vinyl acetate copolymer (EVA), polylactic acid (PLA), ethylene methacrylic acid copolymer (EMAA), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polybutadiene, polyisoprene, poly-4-methylpentene-1, and the like, and composite films in which these are laminated. In particular, a film containing polylactic acid (PLA) as the material of the film is preferable because the oxygen barrier property of the distribution package can be maintained without deteriorating.

  In the present invention, the product packaged with the distribution package is housed and sealed in the outer bag made of the film having the predetermined oxygen permeability described above. However, intrusion and mischief of dust and liquid can be prevented. It does not exclude the provision of pores or the like in the outer bag within the range that can be prevented, or the use of an outer bag made of a porous film. This is because a certain effect is expected from the viewpoint of not reducing the oxygen barrier property of the product packed in the distribution package filled with the contents more than necessary.

  The product packed in the distribution package body sealed and packaged in the outer bag of the present invention can be manufactured by a conventional method. For example, after the content in the distribution package body is filled and sealed, the product packed in the distribution package body is removed. It can be manufactured by putting into the inside from the opening of the bag and sealing and packaging the mouth of the opening by a heat seal method or the like.

  Hereinafter, the present invention will be specifically described by way of examples. In addition, Table 1 shows the layer structure of the hard composite sheet and the flexible composite film constituting the distribution package used in the following Reference Examples, Examples and Comparative Examples. The underline in Table 1 indicates the characteristic part of the composite film. In addition, the notation “//” in the layer structure indicates that the layers described before and after that are bonded by a dry laminate method, and “/” indicates that the layers described before and after that are bonded by a coextrusion method. Means that

[Reference Example 1]
Manufacture of distribution packaged products <Rigid composite sheet for rigid lid>
PET (20 μm) / AD (10 μm) / EVOH (20 μm) / AD (10 μm) / HIPS [50 mass%] + GPPS [50 mass%] (300 μm) / AD (10 μm) / LDPE [50 mass%] + HDPE [50 % By mass] (10 μm) / LDPE (10 μm)

<Flexible composite film for flexible container>
Ny (20 μm) / EVOH (50 μm) / AD (20 μm) / LDPE (20 μm)

  A hard composite sheet and a flexible composite film having the above layer structure were prepared by a coextrusion method.

  Next, at a predetermined position of the hard composite sheet, the PS layer was cut to a depth of 50% of the thickness from the PET layer side, and the hard composite sheet was half-cut. Next, the hard union sheet subjected to the half cut was heat-molded by a mold forming method to form a ridge band that forms a discharge port for discharging the contents.

  On the other hand, the flexible composite film was deep-drawn to form a pocket portion. After filling this pocket portion with mayonnaise (manufactured by Kewpie Co., Ltd.) as a liquid food, it was heat-sealed with a hard composite sheet on which a ridge band was formed. Then, it cut | divided into each distribution package body, and manufactured the distribution package body food (mayonnaise).

[Example 1-1]
Manufacture of liquid foods packed in a distribution package packaged in an outer bag <Composite film for outer bag>
PLA (15 μm) / CPP (13 μm)
A composite film for outer bag (oxygen permeability: about 12,000 ml / m ² · day · MPa) having the above-described layer structure was prepared by an extrusion laminating method and formed into an outer bag using the composite film.

  After the liquid food (mayonnaise) packed in the distribution package obtained in Reference Example 1 is packed in the outer bag, the opening is heat-sealed and sealed, and the liquid package packed in the distribution package is sealed in the outer bag. Food (mayonnaise) was obtained.

[Example 1-2]
Manufacture of liquid foods packed in a distribution package packaged in an outer bag <Composite film for outer bag>
PLA (40 μm) / CPP (20 μm)
A composite film for outer bag (oxygen permeability: about 4,500 ml / m ² · day · MPa) having the above-described layer structure was prepared by an extrusion laminating method, and formed into an outer bag using the composite film.

  After packing one packaged liquid food product (mayonnaise) obtained in Reference Example 1 into the outer bag, the opening is heat sealed and sealed, and the packaged package is sealed and packaged in the outer bag. A liquid food (mayonnaise) was obtained.

[Example 1-3]
Manufacture of liquid foods packed in a distribution package packaged in an outer bag <Composite film for outer bag>
PET (12 μm) / CPP (20 μm)
A composite film for outer bag (oxygen permeability: about 2,200 ml / m ² · day · MPa) having the above-described layer structure was prepared by an extrusion laminating method and formed into an outer bag using the composite film.

  After the liquid food (mayonnaise) packed in the distribution package obtained in Reference Example 1 is packed in the outer bag, the opening is heat-sealed and sealed, and the liquid package packed in the distribution package is sealed in the outer bag. Food (mayonnaise) was obtained.

[Comparative Example 1-1]
Manufacture of liquid foods packed in a distribution package packaged in an outer bag <Composite film for outer bag>
Silica-deposited PET (12 μm) / CPP (20 μm)
A composite film for an outer bag (oxygen permeability: about 5 ml / m ² · day · MPa) having the above layer structure was prepared by an extrusion laminating method and formed into an outer bag using the composite film.

  After the liquid food (mayonnaise) packed in the distribution package obtained in Reference Example 1 is packed in the outer bag, the opening is heat-sealed and sealed, and the liquid package packed in the distribution package is sealed in the outer bag. Food (mayonnaise) was obtained.

[Reference Example 2]
Manufacture of distribution packaged product The hard composite sheet of Reference Example 1 and the flexible composite of Reference Example 1 were prepared in the same manner as Reference Example 1 except that the thickness of EVOH was changed from 20 μm to 10 μm. Using the film, a packaged packaged food (mayonnaise) was produced. The layer structure of the used hard composite sheet is as follows.

<Hard composite sheet for hard lid>
PET (20 μm) / AD (10 μm) / EVOH (10 μm) / AD (10 μm) / HIPS [50 mass%] + GPPS [50 mass%] (300 μm) / AD (10 μm) / LDPE [50 mass%] + HDPE [50 % By mass] (10 μm) / LDPE (10 μm)

[Example 2-1]
Manufacture of liquid food packaged in packaged package sealed in outer bag 1 packed in packaged liquid food product (mayonnaise) obtained in Reference Example 2 was packed in the outer bag used in Example 1-1. The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 2-1]
Manufacture of liquid food packaged in a package package sealed in an outer bag 1 packed in a package packaged liquid food product (mayonnaise) obtained in Reference Example 2 was packed in the outer bag used in Comparative Example 1-1. The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Reference Example 3]
Manufacture of distribution packaged products <Rigid composite sheet for rigid lid>
PET (20 μm) // EVOH (20 μm) // HIPS [80 mass%] + GPPS [20 mass%] (300 μm) / AD (10 μm) / LDPE (10 μm) / LDPE (10 μm)

<Flexible composite film for flexible container>
Ny (20 μm) / EVOH [92 mass%] + oxygen absorbing resin [8 mass%] (50 μm)
/ AD (20 μm) / LDPE (20 μm)

  A hard composite sheet having the above layer structure was prepared by combining the coextrusion method and the dry lamination method. Moreover, the flexible composite film was produced by the coextrusion method. The oxygen barrier layer of the flexible composite film was located in the range of 18 to 64% from the outer surface of the surface protective layer with respect to the thickness of the flexible composite film.

  Using the above-mentioned hard composite sheet and flexible composite film, a distribution packaged food (mayonnaise) was produced in the same manner as in Reference Example 1.

[Example 3-1]
Manufacture of liquid food packaged in a package package sealed in an outer bag One liquid package packaged in a distribution package (mayonnaise) obtained in Reference Example 3 was packed in the outer bag used in Example 1-1. The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 3-1]
Production of liquid food packaged in packaged packaging packaged sealed in an outer bag One packaged packaged liquid food product (mayonnaise) obtained in Reference Example 3 was packed in the outer bag used in Comparative Example 1-1. The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Reference Example 4]
Production of distribution packaged product In the flexible composite film of Reference Example 3, the total amount of the oxygen-absorbing resin in the EVOH layer was made substantially constant, the thickness of the LDPE was changed from 20 μm to 100 μm, and the following layer structure A flexible composite film was prepared by a coextrusion method. Using this flexible composite film and the hard composite sheet of Reference Example 3, a food packaged with a distribution package (mayonnaise) was produced in the same manner as in Reference Example 1. The oxygen barrier layer (EVOH [92% by mass] + oxygen-absorbing resin [8% by mass] (50 μm)) of the flexible composite film is equal to the thickness of the flexible composite film. It was located in the range of 10-40% from the outer surface.

<Flexible composite film for flexible container>
Ny (20 μm) / EVOH [85 mass%] + oxygen absorbing resin [15 mass%] (25 μm) / Ny (10 μm) / EVOH (25 μm) / AD (20 μm) / LDPE (100 μm)

[Example 4-1]
Production of Liquid Food Packed with Dispensed Package Packed Hermetically in an Outer Bag After packing one liquid food package (mayonnaise) packed in a distributed package obtained in Reference Example 4, into the outer bag used in Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) packed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 4-1]
Production of Liquid Food Packed with Dispensed Package Packed in an Outer Bag After Packing One Discharge Packed Packed Liquid Food (Mayonnaise) obtained in Reference Example 4 into the outer bag used in Comparative Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) packed in a distribution package that was hermetically packaged in an outer bag.

[Reference Example 5]
Production of Distribution Package Packed Product In the flexible composite film of Reference Example 4, an oxygen barrier layer (EVOH [85% by mass] + oxygen-absorbing resin [15% by mass] (25 μm) / Ny (10 μm) / EVOH (25 μm) )) EVOH outer layer (EVOH [85% by mass] + oxygen absorbing resin [15% by mass] (25 μm)) of the total amount of oxygen absorbing resin is substantially constant, and each of the EVOH inner layer (EVOH (25 μm)) The following flexible composite films were prepared by changing the thickness of the film. Using this flexible composite film and the hard composite sheet of Reference Example 3, a food packaged with a distribution package (mayonnaise) was produced in the same manner as in Reference Example 1. The layer structure is as follows. In addition, the oxygen barrier layer of the flexible composite film was located in the range of 10 to 40% from the outer surface of the surface protective layer with respect to the thickness of the film.

<Flexible composite film for flexible container>
Ny (20 μm) / EVOH [90% by mass] + Oxygen absorbing resin [10% by mass] (40 μm) / Ny (10 μm) / EVOH (10 μm) / AD (20 μm) / LDPE (100 μm)

[Example 5-1]
Production of liquid food packaged in packaged packaging hermetically packaged in an outer bag After packing one liquid packaged food packaged in distribution package (mayonnaise) obtained in Reference Example 5 into the outer bag used in Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Example 5-2]
Production of liquid food packed in a package package sealed in an outer bag One liquid package (mayonnaise) packed in a package package obtained in Reference Example 5 was packed in the outer bag used in Example 1-2. The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) packed in a distribution package that was hermetically packaged in an outer bag.

[Example 5-3]
Production of Liquid Food Packed with Dispensed Package Packed Sealed in Outer Bag One pack of packed liquid product (mayonnaise) obtained in Reference Example 5 was packed into the outer bag used in Example 1-3. The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 5-1]
Production of Liquid Food Packed with Dispensed Package Packed Hermetically in an Outer Bag After packing one liquid food package (mayonnaise) packed in a distributed package obtained in Reference Example 5 into the outer bag used in Comparative Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) packed in a distribution package that was hermetically packaged in an outer bag.

[Reference Example 6]
Manufacture of distribution packaged products In the hard composite sheet of Reference Example 1, the hard composite sheet prepared in the same manner as Reference Example 1 and Reference Example 1 are acceptable except that the positional relationship between “EVOH” and “HIPS + GPPS” is changed. A food product packed in a distribution package (mayonnaise) was produced using a flexible composite film. The layer structure of the used hard composite sheet is as follows. The distribution package used in Reference Example 6 corresponds to an example of a typical representative distribution package in which the EVOH layer is positioned on the content side of the PS layer.

<Hard composite sheet for hard lid>
PET (20 μm) / AD (10 μm) / HIPS [50 mass%] + GPPS [50 mass%] (300 μm) / AD (10 μm) / EVOH (20 μm) / AD (10 μm) / LDPE [50 mass%] + HDPE [50 % By mass] (10 μm) / LDPE (10 μm)

[Comparative Example 6-1]
Production of Liquid Food Packed with Dispensed Package Package Sealed and Packaged in Outer Bag After packing one liquid food package (mayonnaise) packed in distribution package obtained in Reference Example 6, into the outer bag used in Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 6-2]
Production of liquid food packaged in packaged packaging hermetically packaged in outer bag After packaging one liquid packaged food packaged in distribution package (mayonnaise) obtained in Reference Example 6 into the outer bag used in Comparative Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Reference Example 7]
Manufacture of distribution packaged product In the hard composite sheet of Reference Example 6, the thickness of EVOH was changed from 20 μm to 10 μm, and a hard composite sheet having the following layer structure was prepared by a coextrusion method. Using this hard composite sheet and the flexible composite film of Reference Example 1, a food packaged with a distribution package (mayonnaise) was produced in the same manner as in Reference Example 1.

<Hard composite sheet for hard lid>
PET (20 μm) / AD (10 μm) / HIPS [50 mass%] + GPPS [50 mass%] (300 μm) / AD (10 μm) / EVOH (10 μm) / AD (10 μm) / LDPE [50 mass%] + HDPE [50 % By mass] (10 μm) / LDPE (10 μm)

[Comparative Example 7-1]
Production of Liquid Food Packed with Dispensed Package Packed Hermetically in an Outer Bag After filling one liquid package (mayonnaise) packed in the package obtained in Reference Example 7 into the outer bag used in Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 7-2]
Production of liquid food packaged in a package package sealed in an outer bag After packing one liquid food package (mayonnaise) packed in a package package obtained in Reference Example 7 into the outer bag used in Comparative Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Reference Example 8]
In the hard composite sheet of Production Reference Example 3 for distribution packaged product, the positional relationship between “EVOH” and “HIPS + GPPS” is changed, and the hard composite sheet having the following layer structure is combined with the co-extrusion method and the dry lamination method. Created. Using this hard composite sheet and the flexible composite film of Reference Example 4, a food packaged with a packaged package (mayonnaise) was produced in the same manner as in Reference Example 1.

<Hard composite sheet for hard lid>
PET (20 μm) // HIPS [80 mass%] + GPPS [20 mass%] (300 μm) // EVOH (20 μm) / AD (10 μm) / LDPE (10 μm) / LDPE (10 μm)

[Comparative Example 8-1]
Production of Liquid Food Packed with Dispensed Package Package Sealed and Packaged in Outer Bag After filling one liquid package (mayonnaise) packed in packaged body obtained in Reference Example 8 into the outer bag used in Example 1-1, The opening was heat sealed and sealed to obtain a liquid food (mayonnaise) stuffed in a distribution package that was hermetically packaged in an outer bag.

[Comparative Example 8-2]
After dispensing one packaged packaged liquid food (mayonnaise) obtained in Reference Example 8 into the outer bag used in Comparative Example 1-1, the opening was heat sealed and sealed, and sealed in the outer bag. A dispensed packaged liquid food (mayonnaise) was obtained.

[Example 6]
Manufacture of distribution packaged body-packed product Using the hard composite sheet and flexible composite film of Reference Example 5 and changing the content from mayonnaise to shampoo, the distribution package-filled hair cosmetic composition in the same manner as in Reference Example 1 (Shampoo) was manufactured.

  Next, one liquid pack (shampoo) packed in the distribution package obtained was packed in the outer bag used in Example 1-1, and then the opening was heat sealed to be sealed and packaged in the outer bag. A liquid product (shampoo) packed in a distribution package was obtained.

[Comparative Example 9]
Manufacture of liquid foods packed in a distribution package packaged in an outer bag <film for outer bag>
PS (40μm)
The outer bag film (oxygen permeability: about 34,000 ml / m ² · day · MPa) was used to form an outer bag.

  After the liquid food (mayonnaise) packed in the distribution package obtained in Reference Example 1 is packed in the outer bag, the opening is heat-sealed and sealed, and the liquid package packed in the distribution package is sealed in the outer bag. Food (mayonnaise) was obtained.

<Evaluation test>
Test Example 1: Transport Test 100 pieces of liquid food (mayonnaise) packed in a distribution package that was hermetically packaged in an outer bag were boxed, and a transport test in an urban area on an actual truck was performed. In the case of Comparative Example 9 “liquid food packed in a distribution package body sealed and packaged in an outer bag”, breakage of the outer bag was observed in part, but Examples 1-1 to 5-3 and Comparative Example 1 were observed. In the case of “distributed packaging body-packed liquid food hermetically packaged in the outer bag” of −1 to 8-2, the outer bag was not broken.

Test Example 2: Opening Test Opening properties of the distribution package (distribution package body-packed food and distribution package body hair cosmetic) used in Examples 1-1 to 5-1 and Comparative Examples 6-1 to 8-1 Were evaluated as described below. That is, about 100 pieces of distribution packaging bodies of each Example and Comparative Example were prepared, each distribution packaging body was pinched with a finger, bent into a V shape along a fold line, and the openability was visually evaluated. As a result, the distribution package used in Examples 1-1 to 5-1 and Comparative Example 7-1 could be opened without any problem. On the other hand, some of the distribution packages used in Comparative Examples 6-1 and 8-1 could not be opened.

Test Example 3: Oxygen barrier property test <Preparation of leucomethylene blue agar solution for evaluation of oxygen barrier property test>
First, 10 mL of 0.01 M methylene blue aqueous solution (A solution), 50 mL of 0.01 MS nCl ₂ .0.01 M HCl aqueous solution (B solution) and 1 L of 2 wt% agar aqueous solution (C solution) were prepared. Next, 10 mL of the A solution and 20 mL of the B solution were placed in a beaker to eliminate the blue color due to the A solution. That is, a leucomethylene blue aqueous solution (liquid D) was prepared, and then 30 mL of the liquid B was added to the liquid C previously boiled, and further boiling was continued. After cooling to 80 ° C., a leucomethylene blue agar solution was prepared. The gelled leucomethylene blue agar solution filled and sealed in the distribution package changes color from white to blue when oxygen enters.

<Manufacture of products packed in a distribution package filled and sealed with leucomethylene blue agar solution>
A leucomethylene blue agar solution was used in place of the contents (mayonnaise) used in Examples 1-1 to 5-3 and Comparative Examples 1-1 to 8-2. In other words, the pocket part of the flexible composite film was filled as much as possible with the leuco methylene blue agar solution before gelation, and was heat-sealed except for a part with the hard composite sheet that formed the ridge band that became the discharge port. . Next, the product was cut into individual distribution packaging bodies, air was removed from the unsealed portions, and then completely heat sealed. Subsequently, this was put in the refrigerator and the agar solution was solidified.

  Next, after the distribution package body filled and sealed with the leucomethylene blue agar solution is packed in the outer bag used in each of the above-described examples and comparative examples, the opening is heat-sealed and sealed, and each of the examples and comparative examples is sealed. A product packaged with a distribution package for evaluation of oxygen barrier properties, comprising a combination of the same distribution package and an outer bag was manufactured.

<Evaluation method>
Each distribution package was stored at 35 ° C. in an unhumidified environment (dry) and evaluated by color state. The evaluation results are shown in Table 2. In Table 2, “1” is white, “5” is blue, and a larger value means that oxygen has entered, and “−” means that the subsequent storage is stopped. In addition, the underline in Table 1 shows the characteristic part of a composite film.

<Conclusion>
As can be seen from Table 2, Example 1-1 and Comparative Example 6-1, Example 2-1, Comparative Example 7-1, Example 4-1, and Comparative Example 8-1 using a predetermined outer bag were used. In each of the comparisons, the distribution package used in the example is arranged such that the EVOH layer is disposed closer to the print receiving layer than the PS layer, even though the EVOH layer in the lid is half cut. In this case, by disposing the PS layer closer to the content side than the EVOH layer), the oxygen barrier property was improved as compared with the distribution package used in the comparative example.

  In addition, since the distribution package used in Comparative Example 7-1 in which the EVOH layer is the content side of the PS layer is not half-cut to the EVOH layer in the lid, so that there is no problem in the opening property, The thickness of the EVOH layer was required to be 15 μm or less. On the other hand, in the distribution package used in the example, the EVOH layer is arranged on the print receiving layer side from the PS layer, so that the EVOH layer is completely cut by the half cut process, and there is a problem in the opening property. It can be seen that the thickness of the EVOH layer can be more than 15 μm in order to improve the oxygen barrier property (Example 1-1 or 3-1 and Comparative Example 7-1). Contrast).

  Furthermore, in the flexible composite film, the oxygen barrier layer of the film has a three-layer structure of an EVOH layer inner layer, an EVOH outer layer, and an intervening layer sandwiched between them, and the oxygen barrier layer has a thickness of the film. On the other hand, it is located within the range of 5 to 50% from the outer surface of the surface protective layer, and among the EVOH inner layer and EVOH outer layer in the film oxygen barrier layer, at least the EVOH outer layer contains an oxygen-absorbing resin. The package had further improved oxygen barrier properties (contrast between Example 1-1 or 3-1 and Example 4-1 or 5-1). In particular, the distribution package used in Example 5-1 in which the thickness of the EVOH outer layer in the oxygen barrier layer was made larger than the thickness of the EVOH inner layer was excellent.

  In addition, although the oxygen barrier property of the distribution package itself of the reference examples 1-5 used in the examples is superior to the oxygen barrier property of the distribution package itself of the conventional reference example 6, If the package of the distribution package is hermetically packaged with an outer bag having excellent oxygen barrier properties, the oxygen barrier property of the distribution package itself is impaired, and the oxygen barrier property of the conventional distribution package itself of Reference Example 6 is reduced to the level. It was.

On the other hand, Examples 1-1 to 1-3 in which the distribution packaging bodies of Reference Examples 1 to 5 used in the Examples were sealed and packaged using an outer bag having an oxygen permeability of 2,000 ml / m ² · day · MPa or more. In the case of Example 2-1, Example 3-1, Example 4-1, and Examples 5-1 to 3, the oxygen barrier property of the distribution package itself is a distribution package that is not hermetically packaged with an outer bag. It can be seen that the oxygen barrier property of the distribution package itself is maintained at the same level as itself. In particular, the outer bag having an oxygen permeability of 4,000 ml / m ² · day · MPa or more, or the outer bag containing polylactic acid (PLA) as the material of the film is sealed and packaged in the oxygen barrier property of the distribution package itself. It was excellent.

  According to the product of the present invention, which is hermetically packaged in the outer package, the hard cover of the distribution package constituting the cover is to be the back side of the print receiving layer, the hard intermediate layer and the hard cover. It is formed from a hard composite sheet in which body seal layers are laminated in this order, and the hard intermediate layer is a polystyrene resin layer and an ethylene-vinyl alcohol copolymer that is disposed closer to the print receiving layer than the polystyrene resin layer. And a coalesced resin layer. Therefore, the oxygen barrier property of the hard lid is improved as compared with the case where the polystyrene resin layer is disposed closer to the print receiving layer than the ethylene-vinyl alcohol copolymer resin layer. Moreover, since the ethylene-vinyl alcohol copolymer resin layer itself is half-cut, even if the thickness is increased, the openability is not lowered.

Further, in the present invention, the product packed in the distribution package in which the content is packed in the distribution package is sealed and packaged by the outer bag formed from a film having an oxygen permeability of 2000 ml / m ² · day · MPa or more. . For this reason, the oxygen barrier property of the accommodated distribution package itself can be maintained, and the product packed in the distribution package can be protected from contamination and mischief in the distribution process. Therefore, it is particularly useful in the field of dispensing packaged products that contain contents sensitive to oxygen.

DESCRIPTION OF SYMBOLS 10 Hard cover body 11 Hard cover body surface 12 Bending line 13 Protrusion part 14 Print receiving layer 15 Hard intermediate | middle layer 15a Polystyrene resin layer (PS layer)
15b Ethylene-vinyl alcohol copolymer resin layer (EVOH layer)
16 Lid sealing layer 17 Half cut part 20 Flexible container 21 Pocket part 22 Surface protective layer 23 Oxygen barrier layer 23a Oxygen barrier outer layer (EVOH outer layer)
23b Oxygen barrier inner layer (EVOH inner layer)
23c Intervening layer 24 Container body sealing layer 25 Contents (liquid or paste)
26 Outer bag 100 Distribution package 200 Hard composite sheet 300 Flexible composite film 400 Distribution package packing product 500 Distribution packaging packing product sealed and packaged in outer bag

Claims (9)

It is possible to have a hard lid having a folding line having a half-cut portion formed from the surface side at the center of the surface and a protrusion that forms a discharge port when folded, and a pocket portion for containing the contents. A distribution package having a flexible container, the peripheral edge of the flexible container being fused to the back of the hard lid;
A liquid or paste-like material housed as contents in the pocket portion of the flexible container of the distribution package;
In a product packaged with a distribution package having an outer bag in which a distribution package containing a liquid or paste-like material is sealed and packaged,
The hard lid is formed of a hard composite sheet obtained by laminating a print receiving layer, a hard intermediate layer, and a lid seal layer to be the back of the hard lid in this order, and has a thickness of 250 μm or more and 700 μm or less. And
The hard intermediate layer has an ethylene-vinyl alcohol copolymer resin layer and a polystyrene resin layer having a thickness of 150 μm or more and 500 μm or less,
At least the ethylene-vinyl alcohol copolymer resin layer is disposed closer to the print receiving layer than the polystyrene resin layer,
The outer package is formed from a film having an oxygen permeability of 2000 ml / m ² · day · MPa or more.   The product according to claim 1, wherein the print receiving layer has a polyester resin layer, and the lid seal layer has a polyethylene resin layer.   The distribution package packing according to claim 1 or 2, wherein, in the hard intermediate layer, the thickness of the ethylene-vinyl alcohol copolymer resin layer disposed on the print receiving layer side of the polystyrene resin layer is more than 15 µm and 50 µm or less. Product.   The flexible container body is formed of a flexible composite film in which a surface protective layer, an oxygen barrier layer, and a container body seal layer to be disposed on the hard lid side are laminated in this order, and the oxygen barrier layer The distribution packaged product-packed product according to any one of claims 1 to 3, which has an ethylene-vinyl alcohol copolymer resin layer containing an oxygen-absorbing resin.   The oxygen barrier layer has an ethylene-vinyl alcohol copolymer resin outer layer on the surface protective layer side, an ethylene-vinyl alcohol copolymer resin inner layer on the container seal layer side, and an intervening layer sandwiched between them. The ethylene-vinyl alcohol copolymer resin inner layer and the ethylene-vinyl alcohol copolymer resin outer layer have at least an ethylene-vinyl alcohol copolymer resin outer layer containing an oxygen-absorbing resin. Distribution packing product.   The product according to claim 5, wherein the thickness of the ethylene-vinyl alcohol copolymer resin outer layer is larger than the thickness of the ethylene-vinyl alcohol copolymer resin inner layer.   The product according to claim 5 or 6, wherein the oxygen barrier layer is located in a range of 5 to 50% of the total thickness of the flexible composite film from the surface of the surface protective layer.   8. The distribution packaged product according to any one of claims 5 to 7, wherein the intervening layer has a polyamide resin layer.   The product packaged in a distribution package according to any one of claims 1 to 8, wherein the liquid or paste-like product is a liquid food or a paste-like food.

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