KR101650952B1 - Distribution packagaing body - Google Patents

Abstract

assignment
A distribution package having a structure in which a container body of a flexible member is fusion-bonded to a cover of a hard material having a projection formed with a half cut portion at a central portion of the surface and a protrusion for forming a discharge port, Thereby preventing oxygen from permeating the cover to a higher level.
Solution
And a flexible base body having a hard lid body having a bending line having a half cut portion formed on the surface side at the center of the surface and a protrusion portion forming a discharge port when bent and a pocket portion for receiving the contents, And a peripheral edge portion of the flexible substrate is fused to the back surface of the rigid cover body. The rigid cover body is formed of a rigid composite sheet in which a print receiving layer, a hard intermediate layer, and a cover body seal layer are laminated in this order. The hard intermediate layer has a polystyrene resin layer and an ethylene-vinyl alcohol copolymer resin layer disposed on the print-receiving layer side.

Description

DISTRIBUTION PACKAGING BODY}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dispensing package for packaging various liquid materials and paste-like products.

Disclosed is a dispensing package capable of pushing out the filled contents (liquid food such as jam, ketchup, dressing, etc.) by a simple operation of bending the cover with one hand and pressing it as it is. The distribution package has a flexible member such that a flexible portion having a half cut portion formed at a central portion of its surface and a protruding portion forming a discharge port when bent at the time of use are formed on a cover of a hard material, And the container body is fused. As concrete examples of the hard material constituting the cover, polyethylene, polyethylene terephthalate and polystyrene copolymers have been proposed.

However, these synthetic resins, which are mentioned as concrete examples, can not be said to have a sufficient oxygen barrier property, and as a result, there is a problem that the content of the package becomes deteriorated by oxygen permeated from the cover.

To prevent oxygen permeation from the cover, an ethylene-vinyl alcohol copolymer resin (EVOH) layer having a thickness of 2 to 15 탆 and exhibiting good oxygen barrier properties is laminated with a polystyrene resin (PS) layer exhibiting good open structure (Patent Document 2). In this case, in order to prevent the oxygen barrier property of the EVOH layer from being damaged when the half cut portion is formed from the front surface side of the lid to form the bending line, the PS layer is disposed on the front surface side of the lid and the EVOH layer is disposed on the content side, The half cut was designed not to reach the EVOH layer.

Japanese Patent No. 3140016 Japanese Laid-Open Patent Publication No. 2006-35449

However, the distribution package disclosed in Patent Document 2 has a satisfactory open structure and can prevent oxygen permeation from the lid to some extent. However, when the content is easily oxidized and left to stand for a long time, There is a problem that degradation of quality occurs. For this reason, it is required to prevent the oxygen permeation from the cover of the dispensing package to a higher level.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of the prior art described above and to provide a lid of a hard material having a bending line formed with a half cut portion at the center of its surface and having protrusions for forming a discharge port when bent, The present invention relates to a distribution package having a structure in which a container body of a flexible member is fused so as to form a pocket portion for accommodating a container.

The present inventors have attempted to make the thickness of the EVOH layer constituting the cover of the dispensing package body thicker than 15 탆 in Patent Document 2, on the assumption that the oxygen barrier property is improved when the thickness of the EVOH layer becomes thicker. However, if the EVOH layer is made thicker than 15 占 퐉, when the cover is bent, the EVOH layer is elongated and cracks do not occur in the half cut portion, and the open configuration is adversely damaged, Respectively. Therefore, the positional relationship between the PS layer and the EVOH layer is reversed and the PS layer is disposed on the content side. As a result, although the half cut portion is formed in the EVOH layer, the oxygen barrier property of the cover of the dispensing package is improved And further, the half-cut portion is formed in the EVOH layer, so that the configuration of the distribution package does not deteriorate. Thus, the present invention has been completed.

That is, the present invention provides a flexible container having a flexible lid body having a bending line having a half cut portion formed from the surface side at the central portion of the surface and a protruding portion having a discharge port when bent, and a pocket portion for receiving contents And a peripheral edge portion of the flexible base material is fusion-bonded to the back surface of the hard lid body,

The hard lid body is formed of a rigid composite sheet formed by laminating a print receiving layer, a hard intermediate layer, and a lid seal layer to be a back surface of the hard lid body in this order, and has a thickness of 250 mu m or more and 700 mu m or less Thickness,

Wherein the hard intermediate layer has an ethylene-vinyl alcohol copolymer resin layer and a polystyrene resin layer having a thickness of 150 占 퐉 or more and 500 占 퐉 or less,

Wherein at least an ethylene-vinyl alcohol copolymer resin layer is disposed on the print-receiving layer side of the polystyrene resin layer.

In addition, the present invention provides a product contained in a dispensing package formed by filling a pocket portion of a flexible substrate of the above-described dispensing package with liquid or paste-like material.

The hard lid constituting the dispensing package of the present invention is formed of a hard composite sheet formed by laminating a print receiving layer, a hard intermediate layer and a lid sealing layer to be a back surface of the hard lid in this order, A polystyrene resin layer, and an ethylene-vinyl alcohol copolymer resin layer disposed on the print receiving layer side of the polystyrene 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 on the print-receiving layer side of the ethylene-vinyl alcohol copolymer resin layer. In addition, since the ethylene-vinyl alcohol copolymer resin layer itself is cut by the half cut, even if the thickness is increased, the configuration of the distribution package does not deteriorate.

1 is a perspective view of a dispensing package according to the present invention.
Fig. 2 is a cross-sectional view of a rigid composite sheet for forming a hard lid of the dispensing package according to the present invention, in which a half cut portion is formed. Fig.
3 is a cross-sectional view of a flexible composite film for forming a flexible substrate of the dispensing package of the present invention.
4 is a cross-sectional view of a flexible composite film for forming a flexible substrate of the dispensing package of the present invention.

Hereinafter, a dispensing package according to the present invention will be described with reference to the drawings.

1, the dispensing package 100 of the present invention is constituted by a hard lid 10 and a flexible base 20, and the hard lid 10 Has a bending line (12) having a half cut portion formed from the surface side at the central portion of the surface (11) and a projection portion (13) for forming a discharge port when bent. The external shape of the dispensing package of the present invention may be the same as the external shape of the conventional dispensing package.

Here, the "hardness" of the hard cover 10 is relatively harder than that of the flexible base 20, and the flexible package 100 can be bent with a bending line while holding the package 100, And the like. The "flexible" of the flexible base 20 is relatively more flexible than the hard lid 10 and when the distribution package 100 is bent with a finger to bend it, Means that the contents are deformed by being pressed by the body 10 so that the contents can be discharged from the opened protrusion 13. [

The " central portion " of the surface 11 of the hard cover 10 is, for example, a region including a line joining the midpoints of opposing long sides when the hard cover 10 is rectangular, In the case of rhombus, it is a region containing a short diagonal line, and in the case of a circle, it is a region containing a line joining the midpoints of opposing sides or a region containing one diagonal line. Is an area including a straight line, and when it is an ellipse, it is an area including a straight line passing through the center of the long diameter and perpendicular to the long diameter, but is not limited thereto.

2, the hard cover 10 includes a print receiving layer 14, a hard intermediate layer 15, and a lid body seal layer 16 to be a back surface of the hard lid body 10, And the rigid composite sheet 200 is made of the same material. The hard intermediate layer 15 has a polystyrene resin layer (PS layer) 15a and an ethylene-vinyl alcohol copolymer resin layer (EVOH layer) 15b. The half cut portion 17 is formed from the surface side of the hard lid member 10 and reaches the PS layer 15a beyond the EVOH layer 15b. That is, at least the EVOH layer 15b is disposed closer to the print receiving layer 14 than the PS layer 15a. Any resin layer may be sandwiched between the PS layer 15a of the hard intermediate layer 15 and the lid body seal layer 16 within a range that does not impair the effects of the present invention such as the open configuration.

The flexible base 20 has a pocket portion 21 for accommodating contents such as food or the like and is provided on the back surface of the hard cover 10 with a peripheral edge portion of the flexible base 20 (Not shown) are welded. The flexible base body 20 forming the pocket portion 21 may be provided on one side of the bending line 12 and on both sides of the bending line 12 in accordance with the purpose of use of the distribution package 100, One each, or a plurality of others can be formed. The pocket portions 21 on both sides of the bending line 12 may be communicated with each other.

3, the flexible substrate 20 includes a surface protective layer 22, an oxygen barrier layer 23, and a gas-tight seal layer 23 which is in contact with the contents and is to be adhered to the hard lid 10, (24) are laminated in this order. 4, the oxygen barrier layer 23 has an oxygen barrier outer layer 23a and a gas barrier layer 24 on the side of the surface protective layer 22 with the intervening layer 23c interposed therebetween. And the oxygen barrier inner layer 23b may be formed on the side of the oxygen barrier inner layer 23b. By forming the oxygen barrier layer 23 in a layered structure, the oxygen barrier property can be further improved.

The meaning of the half cut is the same as the conventional meaning. The half cut portion 17 can be formed by a known half cut device disclosed in, for example, Japanese Laid-Open Patent Publication No. 2001-328095. The PS layer 15a is cut from the side of the print receiving layer 14 of the hard lid 10 so that the PS layer 15a has a total thickness of the PS layer 15a It is preferable to insert a cut to a depth of 10 to 90% from the surface layer side.

The protruding portions 13 may be formed on the bending line 12 preferably formed with the half cut portions 17. One or a plurality of the protruding portions 13 may be formed depending on the purpose of use of the dispensing package 100. [ The shape of the protruding portion 13 is such that the both ends of the hard cover 10 of the distribution package 100 are bent downward with their fingers around the bending line and bent in a V- It may be a shape to be released. For example, as shown in Fig. 1, it may be a protruding band shape, a triangular pyramid shape, a quadrangular pyramid shape, a semi-circular shape, or the like. The formation of the protruding portions 13 can be generally performed by heating and deforming by the mold forming method after the half cut processing.

The thickness of the hard lid 10 may be the same as the thickness range of the lid usually used as the lid of the dispensing package, specifically 250 占 퐉 to 700 占 퐉, preferably 250 占 퐉 to 500 占 퐉 Or less. By doing so, it is possible to provide a suitable sheet as a lid body of the dispensing package 100 and to provide a suitable sheet elasticity and touch without deteriorating the formability of the rigid composite sheet 200, .

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

The print receiving layer 14 constituting the hard lid 10 is a layer disposed on the outer side of the hard lid 10 (on the side opposite to the flexible base 20), and may be a gravure printing method or a flexographic printing method Is a layer in which a printing ink is received and a printing layer is formed. It is also a layer having a function of protecting the hard intermediate layer 15. Such a print receiving layer 14 can be composed of a thermoplastic resin layer exhibiting good printability and print stability, and it is preferable that the print receiving layer 14 has a polyester resin layer particularly excellent in their properties. Usually, the print-receiving layer 14 is made of a single-layer polyester resin, and two or more layers of the same or different types of polyester resin layers may be laminated by a dry lamination method or a co-extrusion method.

As the polyester resin layer, those same as those used in conventional distribution packages can be used. For example, in 100 mol% of the polyhydric alcohol component, 1,4-cyclohexane dimethanol component is contained in an amount of 5 mol% or more, 10 to 50 mol%, more preferably 15 to 45 mol%, of the non-crystalline copolymer polyester resin can be used. In this case, if the 1,4-cyclohexane dimethanol component is too small, it is difficult to increase the degree of uncrystallization (amorphization degree) of the copolymer polyester resin, while if it is excessively large, the impact strength of the film tends to decrease It is necessary to note that.

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

Examples of the polyhydric alcohols constituting the polyhydric alcohol component include 1,3-propanediol, triethylene glycol, 1,4-butanediol, 1,6-cyclohexanedimethanol, 1,4-cyclohexanedimethanol, Pentanediol, 2-methyl-1,5-pentanediol, 2,2-diethyl-1,3-propanediol, 1,9-nonanediol, Diethylene glycol, dimerdiol, polyoxytetramethylene glycol, polyethylene glycol, an alkylene oxide adduct of a bisphenol compound or a derivative thereof, and the like may also be used. Can be used together.

As the polyvalent carboxylic acids constituting the polyvalent carboxylic acid component, aromatic dicarboxylic acids, ester-forming derivatives thereof, and aliphatic dicarboxylic acids 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. Examples of the ester derivatives of aromatic dicarboxylic acids and terephthalic acid 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 and succinic acid, and aliphatic dicarboxylic acids usually referred to as dimeric acid.

The thickness of the print receiving layer 14 (typically a polyester resin single layer) may be within the thickness range of the print receiving layer that is generally used as the hard lid 10 of the dispensing package 100, If the thickness is excessively thin, the surface strength of the rigid composite sheet 200 for forming the hard lid 10 of the dispensing package 100 is lowered and the printed layer peels off together with the print receiving layer 14 On the other hand, when the thickness of the print receiving layer 14 is too thick, adjustment of the half cut into the PS layer 15a tends to become difficult, so that it is preferably 10 m or more and 50 m or less, 10 占 퐉 or more and 40 占 퐉 or less.

The hard intermediate layer 15 constituting the hard lid 10 is a layer for imparting good oxygen barrier properties to the hard lid 10 and has a PS layer 15a and an EVOH layer 15b, Respectively. Further, other thermoplastic resin such as an adhesive resin can be appropriately added to the EVOH layer 15b as needed within a range that does not lose its function. As the adhesive resin, for example, an olefin-based copolymer having a carboxyl group is preferable, and an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, a maleic anhydride-modified polyethylene and the like are particularly preferable for adhesion to a polyolefin- Suitable. The amount of the adhesive resin to be added to the EVOH layer 15b is preferably 20 wt% or less as long as the gas barrier property is not lost.

The PS layer 15a is a layer which gives strength and openings 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 Quot;), styrene-butadiene block copolymer (butadiene-based compound), or combinations thereof. Here, GPPS does not contain a rubber component and has characteristics that are highly susceptible to cracking. On the other hand, HIPS has a property that it is not cracked well because a rubber component is blended. Therefore, by appropriately controlling the compounding ratio of GPPS and HIPS, the cracking property occurring in the cover body at the time of opening of the package can be controlled. The blending ratio of GPPS to HIPS is preferably 10: 90 to 80:20, more preferably 10: 90 to 70: 30 in terms of a mass ratio.

The thickness of the PS layer 15a may be the same as the thickness range of the PS layer normally used for the cover body of the dispensing package. If the PS layer 15a is too thin, It is usually not less than 150 占 퐉 and not more than 500 占 퐉, preferably not less than 200 占 퐉 and not more than 400 占 퐉 because there is no need to increase the thickness more than necessary. In addition, since the preferable thickness of the rigid composite sheet 200 for forming the hard lid 10 is not less than 250 탆 and not more than 700 탆, the PS layer 15a in the rigid composite sheet 200 is the main constituent layer have.

The PS layer 15a also adjusts the cracking property that occurs in the hard lid 10. In the case of the dispensing package 100 having the bending line 12 in which the half cut portion 17 is formed, The depth of the half cut portion 17 becomes 10 to 90% from the side of the print receiving layer 14 of the PS layer 15a when the half cut portion 17 is formed on the PS layer 15a from the surface layer side It is desirable to put the cut until the end.

The EVOH layer 15b is a layer exhibiting oxygen barrier properties. The EVOH layer 15b is laminated on the PS layer 15a by a dry lamination method or a co-extrusion method. The half cut extending from the print receiving layer 14 side to the PS layer 15a is formed as described above so that the EVOH layer 15b itself is cut in the thickness direction by the half cut portion 17. [ Therefore, the EVOH layer 15b does not participate in cracks generated when the dispensing package 100 is opened. Therefore, the oxygen barrier property of the hard cover 10 can be improved by making the layer thickness of the EVOH layer 15b thicker than the conventional thickness (5 to 15 占 퐉 thickness). However, even if the hard cover 10 is too thick, The layer thickness of the EVOH layer 15b disposed on the print-receiving layer side is preferably more than 15 μm and not more than 50 μm, more preferably not less than 15 μm and not more than 40 μm.

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

The lid body seal layer 16 to be the back surface of the hard lid body 10 is to be welded to the flexible base body 20 described later and has the same structure as the seal layer of the lid body of the conventional distribution package body And is preferably formed of 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 kinds. Specifically, when forming the lid body seal layer 16 as a PE layer, a multilayer structure of the PE outer layer on the content side and the inner PE layer on the inner side may be used. As such a two-layered PE layer, low density polyethylene (LDPE), high density polyethylene (HDPE), or a mixture of LDPE and HDPE can be used.

When a combination of LDPE and HDPE is used as the lid body seal layer 16, it is preferable to determine the compounding ratio in consideration of the layer thickness and characteristics required for each of the PE outer layer and the PE inner layer. That is, since the PE outer layer is located on the side of the content of the lid body seal layer 16, it is necessary to ensure the sealing property with the flexible substrate 20 and a suitable open structure. Therefore, . On the other hand, in the PE inner layer, it is necessary that the propagation of the "cut" of the layer (film) be performed satisfactorily with the crack of the PS layer 15a of the hard intermediate layer 15, . Generally, the compounding ratio of LDPE to HDPE is set to 40:60 to 80:20, preferably 50:50 to 80:20, and more preferably 60:40 to 80:20 in terms of a mass ratio. With this structure, the mixing ratio of LDPE and HDPE can be freely controlled, so that the cracking occurring in the lid body when opening the dispensing package 100 and the adhesive strength with the PS layer 15a can be controlled. In addition, by mixing both of them, it is possible to increase the melt tension by LDPE, stabilize the film formability, and obtain a cover excellent in easy cracking at the time of opening due to HDPE.

LDPE preferably has a density of 0.92 or more, and HDPE preferably has a density of 0.95 or more. By increasing the density, good cracking can be imparted by the PE layer.

If the thickness of the lid body seal layer 16 is too thin, it becomes difficult to realize good sealing performance. If it is too thick, it is difficult to realize good cutting at the time of opening, and therefore it is preferably 10 m or more and 40 m or less . Particularly, when the cover body seal layer 16 is composed of a PE outer layer and a PE inner layer, the thickness of each of the PE outer layer and the PE inner layer is preferably 5 占 퐉 or more and 20 占 퐉 or less. As a result, it is possible to maintain good sealing while maintaining good cutting at the time of opening.

The rigid composite sheet for forming the hard cover 10 described above or the flexible substrate 20 described later can be manufactured by a dry lamination method, a co-extrusion method, or a combination thereof. When the front and rear layers are difficult to be adhered to each other when the front and rear layers are adhered by the co-extrusion method, a suitable adhesive resin can be selected and adhered to various materials depending on the material to be adhered.

For example, the hard cover 10 is subjected to a half-cut treatment according to a conventional method for a hard composite sheet 200, and is subjected to bending at a temperature of 170 to 220 占 폚, By forming protrusions 13 to be concentrated, and cutting them into individual hard cover bodies 10 as necessary. Alternatively, the sheet may be put into the manufacturing process of the dispensing package 100 while being connected to a plurality of units, and finally separated.

3, the flexible composite film 300 for forming the flexible substrate 20 constituting the dispensing package 100 according to the present invention includes the surface protection layer 22, An oxygen barrier layer 23, and a gas-tight seal layer 24 to be disposed on the rigid lid 10 side.

The thickness of the flexible composite film 300 constituting the flexible substrate 20 can be the same as the thickness of the flexible composite film for forming the flexible substrate of the conventional distribution package, It is preferably 100 占 퐉 or more and 300 占 퐉 or less, and more preferably 150 占 퐉 or more and 250 占 퐉, in consideration of film strength and moldability, because the composite film is deep drawn by thermoforming to form pocket portions.

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

Examples of the polyamide resin include aliphatic polyamides such as nylon 6, nylon 6-6, nylon 6-10, nylon 11, nylon 12, nylon 6-12, and nylon 4-6; Aliphatic copolymerized polyamides such as nylon 6/6, nylon 6/6, 10, and nylon 6/6, 12; Polyhexamethylene diamine terephthalamide; Polyhexamethylenediamine isophthalamide; And aromatic polyamides such as xylene-group-containing polyamides. Among them, nylon 6 and nylon 6-6 can be preferably used.

If the thickness of the surface protective layer 22 is too thin, the flexible substrate 20 tends to be torn. If the surface protective layer 22 is too thick, performance suitable for the thickness can not be obtained, and it is preferably 10 m or more and 30 m or less.

The oxygen barrier layer 23 constituting the flexible composite film 300 may be composed of a thermoplastic resin having oxygen barrier properties, a silicon oxide vapor deposition film, an aluminum foil, or the like, but in the present invention, the material cost is low, Or an EVOH layer excellent in molding processability. As the EVOH for forming the EVOH layer, the same materials as described in the hard cover 10 can be used.

4, the oxygen barrier inner layer 23a on the surface protective layer 22 side and the oxygen barrier inner layer 23 on the side of the gas barrier layer 24 on the side of the gas barrier layer 24, It is preferable that both of the layers 23b are EVOH layers (that is, EVOH outer layer and EVOH inner layer, respectively).

The EVOH may be appropriately selected from among the same EVOHs described in the hard cover 10.

If the thickness of the oxygen barrier layer 23 is too thin, it is difficult to obtain the desired oxygen barrier property. If the oxygen barrier layer 23 is excessively thick, the moldability is deteriorated. In the case of using a thermoplastic resin having oxygen- 100 탆 or less.

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

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, a polyamide- An oxidizing resin which is easily oxidized in the presence of an oxidizing catalyst such as a reaction product of the oxidizing polyene or the oxidizing polyether of the present invention or a mixture thereof and is capable of reacting with oxygen in the air to exhibit oxygen absorbing ability, A resin containing a hydrolysis-condensation product of a silane compound to which an organic group having at least one group selected from an atom, an alkoxy group, a mercapto group and a hydroxyl group is bonded can be preferably used.

In addition, as the oxygen absorbing resin, any of various known additives, coloring agents, heat resistant and anti-fogging agents, antistatic agents, oxidation catalysts and the like may be added insofar as the effect of the present invention is not impaired. Particularly, in order to improve the oxygen absorption performance of the oxygen absorbing resin, it is preferable to add the transition metal salt as the oxidation catalyst in the range of 5,000 ppm or less by weight of the metal atom. Examples of transition metal salts usable for this purpose include inorganic salts, organic salts or complex salts of transition metals such as cobalt, iron, nickel, furthermore copper, titanium, chromium, manganese and ruthenium, Sulfonic acid salts and the like are preferable, and specific examples include acetate, stearate, propionate, hexanoate, octanoate, neodecanoate and the like.

The blending amount of the oxygen absorbing resin with respect to the oxygen barrier layer 23 is preferably 5 to 50 wt%, more preferably 5 to 50 wt%, in consideration of oxygen absorbability, film forming property of the flexible composite film, Is 5 to 30 wt%.

Further, other thermoplastic resin such as an adhesive resin can be suitably added to the oxygen barrier layer 23 as needed within a range that does not lose its function. As the adhesive resin, for example, an olefin-based copolymer having a carboxyl group is preferable, and an ethylene-acrylic acid copolymer, an ethylene-methacrylic acid copolymer, a maleic anhydride-modified polyethylene and the like are particularly preferable for adhesion to a polyolefin- Suitable. The amount of the adhesive resin to be added to the oxygen barrier layer 23 is preferably 20 wt% or less as long as the gas barrier property is not lost.

4, the oxygen barrier outer layer 23a is formed on the surface protective layer 22 side and the oxygen barrier inner layer 23b is formed on the side of the gas barrier layer 24 for the gas barrier layer 24, And an intervening layer 23c sandwiched therebetween. As a result, the oxygen barrier property becomes better than that of the EVOH single layer. In this case, the oxygen barrier layer 23 (Fig. 4) having a multilayer structure is formed to have a thickness of 50% or less from the outer surface of the surface protective layer 22 ), Preferably not more than 45%. The oxygen barrier layer 23 is formed on the outer surface of the surface protective layer 22 with respect to the thickness of the flexible composite film 300 in consideration of delamination between the surface protective layer 22 and the oxygen barrier layer 23 And more preferably 5% or more (closest to the outer surface).

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 oxygen barrier properties The oxygen barrier inner layer 23a and the oxygen barrier inner layer 23b can contain the oxygen absorbing resin. When the oxygen barrier inner layer 23b contains the oxygen absorbing resin, It is preferable that the oxygen barrier inner layer 23b is blended with not more than 10% by mass of the oxygen absorbing resin, and in particular, only the oxygen barrier outer layer 23a contains the oxygen absorbing resin .

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 made thicker than the thickness of the EVOH inner layer 23b. Thus, the penetration of oxygen into the contents from the outer surface of the surface protective layer 22 can be effectively inhibited.

As the interposition layer 23c, a thermoplastic resin which can be appropriately selected from those which can be used for the surface protective layer 22 constituting the flexible composite film 300 and which is excellent in stretchability and film strength, A polyamide resin can be particularly preferably used.

Since the thickness of the intervening layer 23c is too thin or too thick to realize good oxygen barrier properties, the thickness of the flexible composite film is preferably 1 to 20%, more preferably 5 to 15% Lt; / RTI >

The gas-tight sealing layer 24 serves as an inner wall of the pocket portion 21 and is welded to the back surface of the hard lid 10 as a sealing layer of a flexible gas of a conventional distribution package, The same structure as that of the lid body seal layer 16 of the ash 10 can be used, and preferably it is composed of at least one PE layer. As a preferable PE layer, LDPE can be used to ensure sealing property.

The flexible composite film 300 for forming the flexible base body 20 described above can be manufactured by a dry lamination method, a co-extrusion method, or a combination thereof. Further, when the front and rear layers are difficult to be adhered to each other when the front and rear layers are adhered by the co-extrusion method, a suitable adhesive resin can be selected and adhered to various materials depending on the material to be adhered.

The flexible substrate 20 can be obtained by forming the pocket portion by deep drawing processing of the flexible composite film 300 according to a conventional method and cutting it into individual flexible substrates 20 as required can do. In the deep drawing process, the flexible composite film 300 is generally heated, for example, by bringing it into contact with a hot plate, and then performing the pressing and vacuum molding. The heating temperature is 100 to 170 占 폚. Alternatively, the film may be put into the manufacturing process of the distribution package 100 with the plurality of the films connected, and finally separated.

The dispensing package 100 of the present invention is characterized in that the hard cover 10 and the flexible base body 20 described above are prepared and the contents are filled in the pocket portion 21 of the flexible base body 20 , The periphery of the gas-tight seal layer 24 of the flexible base 20 is heat-sealed to the back surface of the hard lid 10 and separated into individual distribution packages 100 as required have.

The dispensing package 100 of the present invention can be expressed as a product contained in a dispensing package formed by filling a pocket portion of the dispensing package 100 with a liquid or paste form, Lt; / RTI > Specific examples of the products contained in the dispensing package include foods contained in the dispensing package, skin and hair cosmetics contained in the dispensing package, medicines contained in the dispensing package, and the like, according to the filling materials described below.

The liquid or paste form to be filled can be preferably used as long as it contains a component susceptible to deterioration in quality due to oxygen. Examples of the liquid or paste form include sauce, tartar sauce, dressing, jam, mayonnaise, ketchup, mustard, mustard, Liquid form or paste form cosmetics such as paste form food, cream, emulsion, lotion, essence, shampoo, rinse, conditioner, hair dye, whitening cosmetic and cosmetic oil, liquid medicines such as ointment and the like . Particularly, the liquid food is preferable because the quality tends to be deteriorated by oxygen. In addition, the liquid or paste-like material may contain a solid material, for example, a liquid material, and a material such as vegetables as long as it does not damage the discharge of the contents by bending the dispensing package 100.

The product contained in the dispensing package and the dispensing package of the present invention is characterized in that the hard lid is downwardly bent at its both ends with a finger around the bending line to form a V-shape so that the protrusion is opened to form a discharge port, And discharged from the discharge port to the outside of the dispensing package.

Example

Hereinafter, the present invention will be described in detail with reference to examples. Table 1 shows the layer constructions of the rigid composite sheet and the flexible composite film used in the following Examples and Comparative Examples. The notation " // " in the layer structure indicates that the layers described before and after the layer are bonded by the dry lamination method, and " / " indicates that the layer described before and after the layer is bonded by coextrusion .

Example 1

<Rigid composite sheet for hard cover>

(10 占 퐉) / AD (10 占 퐉) / AD (10 占 퐉) / HIPS [50 mass%] + GPPS [50 mass%] (300 占 퐉) / AD (10 占 퐉) / LDPE [ 50% by mass] + HDPE [50% by mass] (10 占 퐉) / LDPE (10 占 퐉)

&Lt; Flexible composite film for flexible container >

Ny (20 占 퐉) / EVOH (50 占 퐉) / AD (20 占 퐉) / LDPE (20 占 퐉)

The hard composite sheet having the above-mentioned layer structure and the flexible composite film were produced by the co-extrusion method.

Next, at a predetermined position of the rigid composite sheet, a cut was made from the PET layer side to the PS layer to a depth of 50% of its thickness to form a half cut in the hard composite sheet. Subsequently, the hard composite sheet having the half cut formed thereon was heat-molded by a metal mold forming method to form a rough surface for forming a discharge port for discharging the contents.

On the other hand, the flexible composite film was subjected to deep drawing forming to form pocket portions. The pocket portion was filled with mayonnaise (manufactured by QP Corporation) as a liquid food, followed by heat sealing with the rigid composite sheet having the rough surface formed thereon. Thereafter, they were cut into individual distribution packages to prepare food (mayonnaise) contained in the distribution package.

Comparative Example 1

(Mayonnaise) contained in a dispensing package was produced in the same manner as in Example 1, except that the positional relationship between "EVOH" and "HIPS + GPPS" was changed in the rigid composite sheet of Example 1. The layer composition of the used hard composite sheet is as follows.

<Rigid composite sheet>

(10 占 퐉) / AD (10 占 퐉) / AD (10 占 퐉) / HIPS [50 mass%] + GPPS [50 mass%] (300 占 퐉) / AD (10 占 퐉) / EVOH 50% by mass] + HDPE [50% by mass] (10 占 퐉) / LDPE (10 占 퐉)

Example 2

(Mayonnaise) contained in the distribution package was produced in the same manner as in Example 1, except that the thickness of the EVOH in the rigid composite sheet of Example 1 was changed from 20 탆 to 10 탆. The layer composition of the used hard composite sheet is as follows.

<Rigid composite sheet>

(10 탆) / AD (10 탆) / AD (10 탆) / HIPS [50 mass%] + GPPS [50 mass%] (300 탆) / AD (10 탆) / LDPE [ 50% by mass] + HDPE [50% by mass] (10 占 퐉) / LDPE (10 占 퐉)

Comparative Example 2

A food (mayonnaise) contained in a distribution package was produced in the same manner as in Example 1 except that the thickness of the EVOH in the rigid composite sheet of Comparative Example 1 was changed from 20 탆 to 10 탆. The layer composition of the used hard composite sheet is as follows.

<Rigid composite sheet>

(10 mu m) / AD (10 mu m) / AD (10 mu m) / HIPS [50 mass%] + GPPS [ 50% by mass] + HDPE [50% by mass] (10 占 퐉) / LDPE (10 占 퐉)

Example 3

<Rigid composite sheet>

(20 탆) / EVOH (20 탆) // HIPS [80 mass%] + GPPS [20 mass%] (300 탆) / AD (10 탆) / LDPE (10 탆) / LDPE

&Lt; Flexible composite film &

Ny (20 占 퐉) / EVOH [92 mass%] + oxygen absorbing resin [8 mass%] (50 占 퐉) / AD (20 占 퐉) / LDPE

The hard composite sheet having the above layer structure was prepared by combining a co-extrusion method and a dry lamination method. Further, a flexible composite film was produced by a co-extrusion method. The oxygen barrier layer of the flexible composite film was positioned in a 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 hard composite sheet and the flexible composite film, the food (mayonnaise) contained in the distribution package was prepared in the same manner as in Example 1. [

Example 4

In the flexible composite film of Example 3, the total amount of the oxygen absorbing resin of the EVOH layer was made substantially constant, the thickness of the LDPE was changed from 20 m to 100 m, Were prepared by coextrusion. Using this flexible composite film and the rigid composite sheet of Example 3, the food (mayonnaise) contained in the distribution package was produced in the same manner as in Example 1. [ The oxygen barrier layer (EVOH [92 mass%] + oxygen absorbing resin [8 mass%] (50 占 퐉)) of the flexible composite film is 10 to 10 times thicker than the thickness of the flexible composite film, To 40%. &Lt; / RTI &gt;

&Lt; Flexible composite film &

Ny (20 m) / EVOH [85 mass%] + oxygen absorbing resin [15 mass%] (25 m) / Ny (10 m) / EVOH (25 m) / AD (20 m) / LDPE (100 m)

Comparative Example 3

(Mayonnaise) contained in a dispensing package was produced in the same manner as in Example 4, except that the positional relationship between "EVOH" and "HIPS + GPPS" was changed in the rigid composite sheet of Example 3. The layer composition of the used hard composite sheet is as follows.

<Rigid composite sheet>

(20 탆) / HIPS [80 mass%] + GPPS [20 mass%] (300 탆) // EVOH (20 탆) / AD (10 탆) / LDPE (10 탆) / LDPE

Example 5

In the flexible composite film of Example 4, the EVOH outer layer of the oxygen barrier layer (EVOH [85 mass%] + oxygen absorbing resin [15 mass%] (25 m) / Ny (10 m) / EVOH (25 m) , The total amount of the oxygen absorbing resin in the layer (EVOH [85 mass%] + oxygen absorbing resin [15 mass%] (25 탆)) was made almost constant and the thickness of each of the EVOH inner layer (EVOH To prepare the following flexible composite film. Using this flexible composite film and the rigid composite sheet of Example 3, the food (mayonnaise) contained in the distribution package was produced in the same manner as in Example 1. [ The layer structure is as follows. The oxygen barrier layer of the flexible composite film was positioned in a range of 10 to 40% from the outer surface of the surface protective layer with respect to the thickness of the film.

&Lt; Flexible composite film &

(10 mu m) / EVOH (10 mu m) / AD (20 mu m) / LDPE (100 mu m) Ny (20 m) / EVOH [90 mass%] + oxygen absorbing resin [10 mass%

Example 6

A hair cosmetic (shampoo) contained in a dispensing package was prepared in the same manner as in Example 1, except that the hard composite sheet and flexible composite film of Example 5 were used and the contents were changed from mayonnaise to shampoo.

Test Example  One : Opening  exam

The distribution packaging body obtained in Examples 1 to 6 and Comparative Examples 1 to 3 (that is, the food contained in the distribution package and the hair cosmetic contained in the distribution package) was evaluated as described below. That is, 100 distributing pouches of each of the examples and the comparative examples were prepared, and each distribution pouch was picked with a finger and bent in a V-shape along a bending line, and the open configuration was evaluated visually. As a result, all of the distribution packages obtained in Examples 1 to 6 and Comparative Example 2 were opened without any problem. On the other hand, those obtained in Comparative Examples 1 and 3 were not opened.

Test Example  2: oxygen barrier property test

<Preparation of leucomethylene blue agar solution for oxygen barrier property test evaluation>

First, 10 mL of 0.01 M methylene blue aqueous solution (liquid A), 50 mL of 0.01 M nCl ₂ 0.01 M HCl aqueous solution (liquid B) and 1 L aqueous 2 wt% agar solution (liquid C) were prepared. Subsequently, 10 ml of the liquid A and 20 ml of the liquid B were placed in a beaker to dissipate the blue color caused by the liquid A. That is, a solution of leuco methylene blue (solution D) was prepared, and then 30 ml of the solution B was added to the solution C previously boiled, and the solution was again added thereto. And immediately cooled to about 70 to 80 DEG C to prepare a leucomethylene blue agar solution. The gelled leucomethylene blue agar solution filled and sealed in the distribution package is discolored from white to blue when oxygen enters.

&Lt; Preparation of Dispensation Packed Body Packed with Leucomethylene Blue Agar Solution >

A leucomethylene blue agar solution was used in place of the contents (mayonnaise) used in Examples 1 to 5 and Comparative Examples 1 to 3. In short, the plexiglass portion of the flexible composite film was packed as full as possible with the leucomethylene blue agar solution before gelation, and was hit-seated except for a part thereof in contact with the rigid composite sheet on which the coarse aggregate as the discharge port was formed. Then, the sheet was cut into individual distribution packages, air was removed from the unsealed portion, and then heat-sealed completely. This was then placed in a refrigerator to agitate the agar solution.

<Evaluation method>

Each dispensing package was stored at 35 DEG C in an unhumidified environment (dry) and evaluated according to the color condition. The underlines in Table 1 represent characteristic parts of the composite film. In Table 2, &quot; 1 &quot; means white, &quot; 5 &quot; means blue, and a larger value means that oxygen enters, and &quot; - &quot;

<Conclusion>

As can be seen from Table 2, in the respective comparisons of Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, and Example 3 and Comparative Example 3, The EVOH layer was disposed on the print-receiving layer side of the PS layer (in other words, the PS layer was disposed closer to the content side than the EVOH layer), although the half cut was formed in the EVOH layer in Comparative Example 1 The oxygen barrier property was improved compared with the sieve.

In addition, the distribution package of Comparative Example 2 in which the EVOH layer was disposed on the content side rather than the PS layer had no half cut in the EVOH layer in the cover, so that the EVOH layer had a thickness of 15 Mu m or less. On the other hand, in the dispensing package of the embodiment, since the EVOH layer is disposed on the print-receiving layer side of the PS layer, the EVOH layer is completely cut by the half cut processing, The thickness of the EVOH layer can be made to exceed 15 [mu] m (in contrast to Example 1 or 3 and Comparative Example 2).

Further, in the flexible composite film, the oxygen barrier layer of the film is made to have a three-layer structure of an EVOH inner layer, an EVOH outer layer and an intervening layer sandwiched therebetween, and the oxygen barrier layer has a thickness Wherein the EVOH outer layer and the EVOH outer layer in the oxygen barrier layer of the film are placed in the range of 5 to 50% from the outer surface of the surface protective layer and the oxygen absorbing resin is contained in at least the EVOH outer layer (In contrast to Example 1 or 3 and Example 4 or 5). Particularly, the distribution package of Example 5 in which the thickness of the EVOH outer layer in the oxygen barrier layer was thicker than the thickness of the EVOH inner layer was excellent.

The distribution package of the present invention is formed of a rigid composite sheet in which the hard lid constituting it is laminated in this order with a lid seal layer to be a back of the print receiving layer, the hard intermediate layer and the hard lid, The intermediate layer has a polystyrene resin layer and an ethylene-vinyl alcohol copolymer resin layer disposed on the print-receiving layer side of the polystyrene 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 on the print-receiving layer side of the ethylene-vinyl alcohol copolymer resin layer. Further, since the ethylene-vinyl alcohol copolymer resin layer itself is half-cut, even if the thickness is increased, the open configuration is not reduced. Thus, it is useful in packaging delicatable contents for oxygen.

10: Hard cover
11: Surface of hard cover
12: bending line
13: protrusion
14: print receiving layer
15: Hard intermediate layer
15a: Polystyrene resin layer (PS layer)
15b: Ethylene-vinyl alcohol copolymer resin layer (EVOH layer)
16: lid body seal layer
17: half cut part
20: Flexible gas
21: pocket portion
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:
24: gas sealing layer
100: Dispensing package
200: Rigid composite sheet
300: flexible composite film

Claims (10)

And a flexible base body having a hard lid body having a bending line having a half cut portion formed on the surface side at the center of the surface and a protrusion portion forming a discharge port when bent and a pocket portion for receiving the contents, And a peripheral edge portion of the flexible substrate is fused to the back surface of the flexible substrate,
The hard lid body is formed of a rigid composite sheet formed by laminating a print receiving layer, a hard intermediate layer, and a lid seal layer to be a back surface of the hard lid body in this order, and has a thickness of from 250 탆 to 700 탆 Thickness,
Wherein the hard intermediate layer has an ethylene-vinyl alcohol copolymer resin layer having a thickness of 15 占 퐉 or more and 50 占 퐉 or less and a polystyrene resin layer having a thickness of 150 占 퐉 or more and 500 占 퐉 or less,
Wherein at least an ethylene-vinyl alcohol copolymer resin layer is disposed on the print-receiving layer side of the polystyrene resin layer. The method according to claim 1,
Wherein the print receiving layer has a polyester resin layer, and the lid sealing layer has a polyethylene resin layer. delete The method according to claim 1,
Wherein the flexible substrate is formed of a flexible composite film formed by laminating a surface protective layer, an oxygen barrier layer, and a gas sealing layer to be disposed on the hard lid body side in this order, wherein the oxygen barrier layer has oxygen absorbing properties A distribution package having an ethylene-vinyl alcohol copolymer resin layer containing a resin. 5. The method of claim 4,
Wherein the oxygen barrier layer comprises an ethylene-vinyl alcohol copolymer resin outer layer on the surface protective layer side, an ethylene-vinyl alcohol copolymer resin inner layer on the gas seal layer side, and an intervening layer interposed between the ethylene vinyl alcohol copolymer resin inner layer and the ethylene- Wherein at least an ethylene-vinyl alcohol copolymer resin outer layer of the copolymer resin inner layer and the ethylene-vinyl alcohol copolymer resin outer layer contains an oxygen absorbing resin. 6. The method of claim 5,
Wherein the thickness of the ethylene-vinyl alcohol copolymer resin outer layer is thicker than that of the ethylene-vinyl alcohol copolymer resin inner layer. 6. The method of claim 5,
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. 6. The method of claim 5,
Wherein the interposing layer has a polyamide resin layer. A product packaged in a dispensing package comprising a pocket portion of a flexible substrate of the dispensing package according to Claim 1 filled with a liquid or a paste. 10. The method of claim 9,
A product in which the liquid or paste form is contained in a liquid form food or a paste form food.

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