2-chamber packaging

Abstract

To provide a double chamber package allowing short time taking-out of a reacted content, and leaving a less residual amount of the content in a package.SOLUTION: In a double chamber package, a first chamber 16 and a second chamber 17 are separated by sealing parts 11-15 formed at peripheral edge parts and an intermediate part of the double chamber package. A sealant layer contains a liquid-repellent layer forming resin composition containing (A) polyolefin resin, (B) silylated polyolefin and (C) a compatibilizer. A polyolefin part of the (B) silylated polyolefin is incompatible with the (A) polyolefin resin, and the (C) compatibilizer has a part compatible with the (A) polyolefin resin and a part compatible with the (B) silylated polyolefin. The intermediate seal part is more easily separated than a peripheral seal part. A first content is a substance showing a reactivity when mixed with, or coming into contact with other substances. A second content is a liquid showing the reactivity to the first content.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a two-compartment package whose interior is divided into two compartments, and in particular to a two-compartment package that allows the contents to be removed efficiently and leaves little residue behind. [Background technology]

[0002] Conventionally, techniques for obtaining cured products using compounds that are reactive with water, such as isocyanate compounds, have been used in a wide range of fields. For example, techniques for obtaining pavement by reacting an asphalt emulsion with an isocyanate compound, and techniques for obtaining waterproofing or water-stopping materials are known (see Patent Documents 1 and 2).

[0003] In the example of the above document, since isocyanate compounds exhibit high reactivity with water, it is necessary to store the isocyanate compound and the asphalt emulsion in separate reagent bottles or the like, open them at the construction site, and mix the isocyanate compound and the asphalt emulsion in a mixing container or the like, which poses the problem of poor workability.

[0004] To solve this problem, two-compartment pouches are sometimes used, but the reactant solidifies over time, causing the contents to lose fluidity within the package, resulting in a large amount of the contents remaining inside the package, which does not solve the problem. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 9-250106 [Patent Document 2] Japanese Patent Application Laid-Open No. 2007-291175 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a two-chamber package that can well store compounds that are reactive with other substances, such as isocyanate compounds that are reactive with water, and that can easily react with reactive compounds when in use, and that can remove the reacted contents in a short time and with a small amount remaining in the package. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides: A two-chamber package in which the interior is sealed by sealing a first laminate film and a second laminate film together to partition the first chamber into a first compartment in which a first content is enclosed and a second compartment in which a second content is enclosed, The first laminate film and the second laminate film each have at least a base layer made of a plastic film and a sealant layer, The first chamber and the second chamber are partitioned by a peripheral seal portion formed on the peripheral edge of the two-chamber package and an intermediate seal portion that partitions the first chamber and the second chamber, At least one of the first laminate film and the second laminate film is a laminate film provided with visibility that allows contents to be confirmed, and both the first laminate film and the second laminate film have a water vapor permeability of 0.1 g / m as evaluated by JIS K7129-7 (calcium corrosion method). 2 / day or less, The sealant layer comprises (A) a polyolefin resin, (B) a silylated polyolefin, and and (C) a resin composition for forming a liquid-repellent layer, the polyolefin moiety of the (B) silylated polyolefin is incompatible with the (A) polyolefin resin, the (C) compatibilizer has a portion compatible with the (A) polyolefin resin and a portion compatible with the (B) silylated polyolefin, The intermediate seal portion is more easily peeled than the peripheral seal portion, The first content is a substance that shows a reaction when mixed with or comes into contact with another substance, The second content is a liquid that is reactive with the first content in the two-chamber package.

[0008] In the above two-compartment packaging, The first component may include one or more of an isocyanate-based compound, an epoxy-based compound, an aziridine-based compound, a melamine-based compound, an aldehyde-based compound, and an amine-based compound.

[0009] In the above two-compartment packaging, The first chamber or the second chamber may be formed with a spout for pouring the contents to the outside.

[0010] In the above two-compartment packaging, The first laminate film and the second laminate film are heat-sealed with a partition tape interposed at a position that separates the first chamber and the second chamber, and with the sealant layers facing each other, thereby forming the peripheral seal portion and the intermediate seal portion, and the partition tape may have a sealant layer and an easy-peel layer, and may be arranged so that the sealant layer of the partition tape is located on the side facing the first laminate film or the side facing the second laminate film, and the easy-peel layer is located on the other side.

[0011] In the above two-compartment packaging, The easy-peel layer may be a layer formed of a heat-sealable, unstretched polyolefin resin film made of two or more polyolefin resins having different melting points.

[0012] In the above two-compartment packaging, The peripheral seal portion may have a seal strength of 40 N / 15 mm or more, and the intermediate seal portion may have a seal strength of 5 to 25 N / 15 mm. [Effects of the Invention]

[0013] According to the two-compartment packaging of the present invention, A two-chamber package is obtained in which a first content and a second content, which are reactive with each other, can be stored well in two separated compartments, and when used, the two types of content can be easily reacted, and when the reacted content is removed, it can be removed in a short time, and the amount of content remaining in the package can be reduced. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a two-chamber package according to the present embodiment. [Figure 2] 2 is a cross-sectional view of the two-compartment package taken along line AB in FIG. 1. [Figure 3] FIG. 2 is a diagram showing the layer structure of a laminated film that constitutes the two-chamber packaging body according to the present embodiment. [Figure 4] 10 is a diagram showing another example of the layer structure of the laminated film that constitutes the two-chamber packaging body according to the present embodiment. FIG. [Figure 5] 3A and 3B are diagrams showing the detailed structure of the two-chamber packaging body according to the present embodiment. [Figure 6] FIG. 2 is a diagram showing the structure of the two-chamber packaging body according to the present embodiment before it is filled with contents. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments described below. Furthermore, in the embodiments shown below, technically preferable limitations are imposed for carrying out the invention, but these limitations are not essential requirements for the present invention.

[0016] FIG. 1 is a perspective view of a two-compartment package according to this embodiment, and FIG. 2 is a cross-sectional view of the two-compartment package taken along line AB in FIG.

[0017] 1 and 2, the two-compartment package 10 according to this embodiment has a structure in which a front laminate film 21 and a back laminate film 22 are sealed to each other at a first side seal portion 11, a second side seal portion 12, an upper seal portion 13, and a lower seal portion 14. The front laminate film 21 and the back laminate film 22 that make up the two-compartment package 10 are also sealed at an intermediate seal portion 15, thereby forming a first chamber 16 and a second chamber 17 that are sealed from the outside.

[0018] Two-chamber package 10 also has a spout 30 provided in part of upper seal 13. Spout 30 opens the spout when the contents contained in first chamber 16 and second chamber 17 are mixed and the resulting mixture is poured out, and is normally kept sealed until use. A support rod 31 is provided inside second chamber 17 from the position of spout 30 to ensure a flow path for the contents to flow to the vicinity of spout 30.

[0019] As will be described later, the intermediate seal portion 15 is easier to peel than the peripheral seal portions (i.e., the first side seal portion 11, the second side seal portion 12, the upper seal portion 13, and the lower seal portion 14). In the two-compartment package 10 of this embodiment, peeling the intermediate seal portion 15 allows the contents contained in the first chamber 16 and the second chamber 17 to mix with each other.

[0020] The first compartment 16 is formed by sealing the front laminate film 21 and the back laminate film 22 together at the first side seal portion 11, the second side seal portion 12, the lower seal portion 14, and the middle seal portion 15, thereby sealing it from the outside.The contents contained therein are the first contents, which are substances that react when mixed with or come into contact with other substances, and in this embodiment, compound A that reacts with water is contained therein.

[0021] On the other hand, the second chamber 17 is formed by sealing the front laminate film 21 and the back laminate film 22 together at the first side seal portion 11, the second side seal portion 12, the upper seal portion 13, and the middle seal portion 15, thereby sealing it from the outside.In this embodiment, the second chamber 17 contains the second content, which is liquid B that is reactive with the above-mentioned compound A, and in this embodiment, this is water.

[0022] In the two-chamber package 10 of this embodiment, by applying an external force to the first chamber 16 or the second chamber 17, or to both the first chamber 16 and the second chamber 17, the middle seal 15, which is easier to peel than the peripheral seals (i.e., the first side seal 11, the second side seal 12, the upper seal 13, and the lower seal 14), is peeled off, thereby making it possible to mix the compound A contained in the first chamber 16, which is reactive with water, and the liquid B (water in this embodiment), which is reactive with the compound A, contained in the second chamber 17, and by opening the spout 30 in a mixed state, the mixture can be poured out. It can be put out.

[0023] In particular, compound A that is reactive with water is usually used mixed with liquid B (here, water) that is reactive with compound A. While these need to be stored in a state where they do not mix with each other until immediately before use, it is desirable that they be used in a well-mixed state at the time of use. According to the two-compartment package 10 of this embodiment, the first compartment 16 and the second compartment 17 are separated from each other, and the two-compartment package 10 is formed by a front-side laminate film 21 and a back-side laminate film 22 whose water vapor transmission rates are within a specific range. This allows compound A that is reactive with water and liquid B that is reactive with compound A to be well-stored. Furthermore, at the time of use, compound A that is reactive with water and liquid B that is reactive with compound A can be easily mixed by peeling intermediate seal 15, which is easier to peel than the peripheral seal. This allows these mixtures, and furthermore, these reactants, to be made ready for use at an appropriate time and in a convenient manner.

[0024] In particular, because the two-compartment package 10 of this embodiment is bag-shaped, the contents can be easily and uniformly mixed by peeling off the middle seal 15 and then shaking the two-compartment package 10 up and down or left and right, or by externally kneading the two-compartment package 10. Therefore, the two-compartment package 10 of this embodiment can satisfactorily store compound A, which is reactive with water, and liquid B, which is reactive with compound A, and can be mixed and used with excellent operability when in use.

[0025] The compound A that is reactive with water is not particularly limited as long as it is a compound that can react with water, and examples thereof include isocyanate-based compounds, epoxy-based compounds, aziridine-based compounds, melamine-based compounds, aldehyde-based compounds, and amine-based compounds.

[0026] Examples of isocyanate compounds include aromatic polyisocyanates such as 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, hydrogenated tolylene diisocyanate, 1,3-xylylene diisocyanate, 1,4-xylylene diisocyanate, triphenylmethane triisocyanate, and tetramethylxylylene diisocyanate; alicyclic polyisocyanates such as diphenylmethane-4,4-diisocyanate, isophorone diisocyanate, 1,3-bis(isocyanatomethyl)cyclohexane, and 1,5-naphthalene diisocyanate; and aliphatic polyisocyanates such as pentamethylene diisocyanate, hexamethylene diisocyanate, trimethylhexamethylene diisocyanate, lysine diisocyanate, and lysine triisocyanate.

[0027] Examples of epoxy compounds include bisphenol A-epichlorohydrin epoxy resins, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerin diglycidyl ether, glycerin triglycidyl ether, 1,6-hexanediol diglycidyl ether, trimethylolpropane triglycidyl ether, sorbitol polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythritol polyglycidyl erythritol, and diglycerol polyglycidyl ether.

[0028] Examples of aziridine compounds include tetramethylolmethane-tri-β-aziridinylpropionate, trimethylolpropane-tri-β-aziridinylpropionate, N,N'-diphenylmethane-4,4'-bis(1-aziridinecarboxamide), and N,N'-hexamethylene-1,6-bis(1-aziridinecarboxamide).

[0029] Examples of melamine compounds include hexamethoxymethylmelamine, hexaethoxymethylmelamine, hexapropoxymethylmelamine, hexaptoxymethylmelamine, hexapentyloxymethylmelamine, hexahexyloxymethylmelamine, and melamine resins.

[0030] Examples of aldehyde compounds include glyoxal, malondialdehyde, succindialdehyde, maleic dialdehyde, glutaric dialdehyde, formaldehyde, acetaldehyde, and benzaldehyde.

[0031] Examples of the amine compounds include hexamethylenediamine, triethyldiamine, polyethyleneimine, hexamethylenetetraamine, diethylenetriamine, triethyltetraamine, isophoronediamine, amino resins, and polyamides.

[0032] The front laminate film 21 and the back laminate film 22 that constitute the two-chamber package 10 have a water vapor permeability of 0.1 g / m 2 / day or less. By using front-side laminate film 21 and back-side laminate film 22 with water vapor permeability values ​​within the above ranges, sufficient water vapor barrier properties can be achieved. Therefore, when the substance contained in first chamber 16 is a water-reactive compound A, deterioration of the substance due to the intrusion of water vapor from the outside can be appropriately prevented, resulting in excellent storage stability. In particular, according to this embodiment, even when a compound highly reactive with water, such as an isocyanate compound, is used as water-reactive compound A, deterioration due to the intrusion of water vapor from the outside can be appropriately prevented. The water vapor permeability can be measured, for example, according to JIS K7129-7 (calcium corrosion method) at a temperature of 40°C and a relative humidity of 90%.

[0033] Note that, as shown in Fig. 3, a laminate film 20 including a base layer 23 made of a plastic film and a sealant layer 24 is used as the front laminate film 21 and the back laminate film 22, from the viewpoint of sealing them together by heat sealing or the like to form the first chamber 16 and the second chamber 17. The front laminate film 21 and the back laminate film 22 can be heat-sealed with the sealant layers 24 facing each other to form a sealed portion. An adhesive layer (not shown) may also be provided between the base layer 23 and the sealant layer 24.

[0034] In this case, the resin constituting the sealant layer 24 contains a resin composition for forming a liquid-repellent layer, which contains (A) a polyolefin resin, (B) a silylated polyolefin, and (C) a compatibilizer, wherein the (C) compatibilizer has a portion that is compatible with the (A) polyolefin resin and a portion that is compatible with the (B) silylated polyolefin, and the polyolefin portion of the (B) silylated polyolefin contains a resin composition for forming a liquid-repellent layer that is incompatible with the (A) polyolefin resin.This makes it possible to give the sealant layer 24 good liquid repellency to the contents, shorten the time required to remove the contents after the reaction, and reduce the amount of contents remaining in the package due to adhesion of the contents to the sealant layer 24.

[0035] According to the sealant layer 24 having the above-described configuration, by using a combination of (A) polyolefin resin, (B) silylated polyolefin whose polyolefin portion is incompatible with the (A) polyolefin resin, and (C) compatibilizer, it is possible to form a sealant layer 24 that can sufficiently suppress adhesion of contents. The (B) silylated polyolefin is a component that imparts liquid repellency to the sealant layer 24. However, if only a (B) silylated polyolefin whose polyolefin portion is incompatible with the (A) polyolefin resin is added to the (A) polyolefin resin, the (B) silylated polyolefin aggregates together in the formed sealant layer 24, resulting in poor dispersibility and difficulty in uneven distribution on the surface of the sealant layer 24, resulting in insufficient liquid repellency. In contrast, by using the (C) compatibilizer in combination with the (B) silylated polyolefin, the dispersibility of the (B) silylated polyolefin is improved, and the polyolefin moieties of the (B) silylated polyolefin are compatible with the (A) polyolefin resin via the (C) compatibilizer, which makes it easier for the silicone moieties of the (B) silylated polyolefin to be unevenly distributed on the surface of the sealant layer 24, thereby efficiently imparting liquid repellency to the sealant layer 24.

[0036] In the resin composition for forming the liquid-repellent layer, the (C) compatibilizer may contain at least one selected from the group consisting of a block copolymer of propylene and ethylene and a block copolymer of ethylene and an ethylene-butylene copolymer. The use of such a (C) compatibilizer makes it possible, for example, to use polypropylene in one of the polyolefin moieties of the (A) polyolefin resin and the (B) silylated polyolefin and polyethylene in the other. This facilitates imparting properties such as heat sealability, heat resistance, and impact resistance to the sealant layer 24. Furthermore, when polypropylene is used in one of the polyolefin moieties of the (A) polyolefin resin and the (B) silylated polyolefin and polyethylene in the other, the use of the (C) compatibilizer can more efficiently impart liquid repellency to the sealant layer 24.

[0037] In the resin composition for forming a liquid-repellent layer, the mass ratio of the content of the (C) compatibilizer to the content of the (B) silylated polyolefin (mass of the (C) compatibilizer / mass of the (B) silylated polyolefin) may be 0.05 to 20. When this content ratio is within the above range, the sealant layer formed can more sufficiently suppress adhesion of contents. Each component will be described in detail below.

[0038] ((A) Polyolefin resin) The polyolefin resin is not particularly limited, and examples thereof include low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-α-olefin copolymer, homo-, block-, or random polypropylene, and propylene-α-olefin copolymer. The inclusion of random polypropylene tends to facilitate heat sealing at low temperatures and in a short time. Examples of α-olefin components include ethylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, and 4-methyl-1-pentene. The copolymer may be a random copolymer or a block copolymer. In addition to the above, the polyolefin resin may be a cyclic polyolefin such as polynorbornene. Furthermore, from the viewpoints of sealability and strength properties (tensile strength, impact strength, etc.), the polyolefin resin is preferably a linear polyolefin, and the linear polyolefin may be linear or branched. The melting point of the polyolefin resin can be adjusted appropriately depending on the end use.

[0039] The polyolefin resin may be a modified polyolefin modified with a specific acid. The modified polyolefin can be obtained by graft-modifying a polyolefin with an unsaturated carboxylic acid derivative component derived from, for example, an unsaturated carboxylic acid, an acid anhydride of an unsaturated carboxylic acid, or an ester of an unsaturated carboxylic acid. Alternatively, modified polyolefins such as hydroxyl-modified polyolefins and acrylic-modified polyolefins can also be used as the polyolefin resin.

[0040] The above-mentioned polyolefin resins can be used singly or in combination of two or more.

[0041] ((B) Silylated Polyolefin) The silylated polyolefin is a component that imparts liquid repellency to the sealant layer. The silylated polyolefin is a polyolefin unit that has a silicone moiety.

[0042] As the silylated polyolefin, for example, PE-Si graft copolymer is available from Toray. Examples include products manufactured by Dow Corning Corporation, PE-Si block copolymers such as Exforla manufactured by Mitsui Chemicals Fine Co., Ltd., and PP-Si graft copolymers such as products manufactured by Toray Dow Corning Co., Ltd.

[0043] As the silylated polyolefin, a block copolymer is preferable to a graft copolymer in order to further improve the liquid repellency of the sealant layer, because block copolymers tend to be unevenly distributed or bleed out on the surface of the liquid-repellent layer 11.

[0044] The above-mentioned silylated polyolefins can be used singly or in combination of two or more.

[0045] The polyolefin moiety of a silylated polyolefin is incompatible with the polyolefin resin (A). The use of a silylated polyolefin whose polyolefin moiety is incompatible with the polyolefin resin (A) increases the options for material combinations of the polyolefin resin (A) and the silylated polyolefin (B), enabling designs tailored to specific purposes and applications, and also offering the advantage of tending to make it easier to improve liquid repellency.

[0046] ((C) Compatibilizer) The compatibilizer is a component having a portion compatible with the (A) polyolefin resin and a portion compatible with the (B) silylated polyolefin. Use of the compatibilizer can improve the compatibility between the (A) polyolefin resin and the (B) silylated polyolefin, whose polyolefin portion is incompatible with the (A) polyolefin resin.

[0047] The moiety compatible with the (A) polyolefin resin may be a polyolefin structure compatible with the (A) polyolefin resin, and preferably has the same type of polyolefin structure as the (A) polyolefin resin. That is, when the (A) polyolefin resin is a polyethylene resin, the (C) compatibilizer preferably has a polyethylene structure, and when the (A) polyolefin resin is a polypropylene resin, the (C) compatibilizer preferably has a polypropylene structure. Furthermore, when the (A) polyolefin resin is a copolymer of two or more olefins, such as an ethylene-α-olefin copolymer or a propylene-α-olefin copolymer, the (C) compatibilizer preferably has at least a structure obtained by polymerizing or copolymerizing an olefin of the same type as the olefin that is the main component of the olefins constituting the copolymer.

[0048] The moiety compatible with (B) silylated polyolefin may be a polyolefin structure compatible with the polyolefin moiety of (B) silylated polyolefin, and preferably has the same polyolefin structure as the polyolefin moiety of (B) silylated polyolefin. That is, when the polyolefin moiety of (B) silylated polyolefin has a polyethylene structure, the (C) compatibilizer preferably has a polyethylene structure, and when the polyolefin moiety of (B) silylated polyolefin has a polypropylene structure, the (C) compatibilizer preferably has a polypropylene structure. Furthermore, when the polyolefin moiety of (B) silylated polyolefin has a structure based on a copolymer of two or more olefins, such as an ethylene-α-olefin copolymer or a propylene-α-olefin copolymer, the (C) compatibilizer preferably has at least a structure obtained by polymerizing or copolymerizing an olefin of the same type as the main olefin of the olefins constituting the copolymer.

[0049] As the compatibilizer (C), for example, a block copolymer of ethylene and propylene, or a block copolymer of ethylene and an ethylene-butylene copolymer, can be used. In this case, (A) polyolefin resin or (B) silylated polyolefin If the polyolefin portion of (A) polyolefin resin or (B) silylated polyolefin is polyethylene, that portion will be compatible with the polyethylene portion of (C) compatibilizer, and if the polyolefin portion of (A) polyolefin resin or (B) silylated polyolefin is polypropylene, that portion will be compatible with the propylene or ethylene-butylene copolymer portion of (C) compatibilizer.

[0050] The above-mentioned (C) compatibilizers can be used singly or in combination of two or more.

[0051] Furthermore, in the two-compartment package 10 of this embodiment, from the viewpoint of making the contents accommodated in the first compartment 16 and the second compartment 17 visible, at least one of the front laminate film 21 and the back laminate film 22 can be made to be visible (i.e., a light-transmitting film). That is, in this embodiment, both the front laminate film 21 and the back laminate film 22 can be light-transmitting films, or the front laminate film 21 can be a light-transmitting film and the back laminate film 22 can be a light-opaque film, or further, the front laminate film 21 can be a light-opaque film and the back laminate film 22 can be a light-transmitting film.

[0052] The base layer 23 constituting the laminated film 20 is made of a plastic film with relatively high rigidity, such as a polyethylene terephthalate film (PET), a polyamide (nylon) film (Ny), or an oriented polypropylene film (OPP). The thickness of the base material layer 23 is preferably 5 to 100 μm. The base layer 23 may be a laminate of two or more layers as required, and in this case, the same type of plastic film may be used, or different types of plastic films may be used.

[0053] Furthermore, a barrier layer that prevents the permeation of oxygen and water vapor may be provided in the laminated film 20. As the barrier layer, a barrier film in which one or more metal vapor deposition layers, inorganic compound vapor deposition layers, or barrier coating layers are provided on the base layer 23, or a metal foil, etc. can be used. Examples of the metal vapor deposition layer and inorganic compound vapor deposition layer include vapor deposition films made of metals such as aluminum, copper, and silver, inorganic oxides such as yttrium tantalum oxide, aluminum oxide, silicon oxide, and magnesium oxide, or mixtures thereof.

[0054] The method for forming the vapor-deposited film is not particularly limited, but a typical vacuum vapor deposition method can be used. Sputtering, ion plating, plasma vapor deposition (PCVD), and other methods can also be used. Considering productivity, vacuum vapor deposition is currently preferred. The heating method for vacuum vapor deposition is preferably one of electron beam heating, resistance heating, and induction heating. Furthermore, in order to improve adhesion to the substrate layer 23 and the density of the vapor-deposited layer, deposition can also be performed using a plasma-assisted method or an ion-beam-assisted method. Furthermore, reactive vapor deposition, in which oxygen gas or the like is blown in during deposition, can be performed to increase the transparency of the vapor-deposited layer.

[0055] The barrier coating layer can be formed using a coating agent whose main component is an aqueous solution or a water / alcohol mixture containing at least one of (a) one or more alkoxides or their hydrolyzates, or both, and (b) tin chloride, and a water-soluble polymer. For example, a solution can be prepared by dissolving a water-soluble polymer and tin chloride in an aqueous solvent (water or a water / alcohol mixture), or by mixing this with a metal alkoxide directly or after pre-treatment such as hydrolysis. This solution can be coated on the substrate layer 23 and then heated and dried to form the barrier coating layer.

[0056] The water-soluble polymers used in coating agents are polyvinyl alcohol, polyvinylpyrrolidone, Examples of suitable polyvinyl alcohols include lysine, starch, methyl cellulose, carboxymethyl cellulose, and sodium alginate. Polyvinyl alcohol (PVA) is particularly preferred because it can further enhance gas barrier properties. Polyvinyl alcohol is generally obtained by saponifying polyvinyl acetate, and may be a so-called partially saponified PVA in which several tens of percent of acetate groups remain, or a complete PVA in which only a few percent of acetate groups remain, and is not particularly limited.

[0057] The tin chloride used in the coating agent may be stannous chloride (SnCl2), stannic chloride (SnCl4), or a mixture thereof. These tin chlorides may be anhydrous or hydrated.

[0058] Furthermore, the metal alkoxides used in coating agents are compounds represented by the general formula M(OR)n (M: metal such as Si, Ti, Al, Zr, etc., and R: alkyl group such as CH3, C2H5). Specific examples include tetraethoxysilane [Si(OC2H5)4] and triisopropoxyaluminum [Al(O-2'-C3H7)3]. Among these, tetraethoxysilane and triisopropoxyaluminum are preferred because they are relatively stable in aqueous solvents after hydrolysis.

[0059] When applying the coating agent onto the base layer 23, the coating agent can be applied by any conventionally known method such as a commonly used dipping method, roll coating method, screen printing method, spray method, or gravure printing method.

[0060] These vapor-deposited layers or coating layers can be formed by stacking two or more layers as needed. For example, a vapor-deposited layer of an inorganic oxide can be formed on a substrate layer, and then a coating layer can be formed on top of that.

[0061] Another example of the barrier layer is a metal foil such as aluminum foil. The thickness of the metal foil is not particularly limited, but is preferably 1 to 40 μm, and more preferably 4 to 12 μm.

[0062] Figure 4 shows an example of a laminated film 20, which is a laminated film 20b having a configuration of a first base layer 23a (12 μm) made of PET film / a barrier layer 25 (7 μm) made of aluminum foil / a second base layer 23b (15 μm) made of Ny film / a sealant layer 24 (60 μm).

[0063] FIG. 5 is a diagram showing the detailed structure of the two-compartment packaging body according to this embodiment, and FIG. 6 is a diagram showing the structure of the two-compartment packaging body according to this embodiment before it is filled with contents.

[0064] The two-compartment package 10 according to this embodiment is produced by sealing compound A, which is reactive with water, in the first compartment 16 as a substance that becomes reactive when mixed with or comes into contact with another substance, and by sealing water in the second compartment 17 as liquid B that is reactive with compound A. A method for producing the two-compartment package 10 according to this embodiment will now be described.

[0065] First, as shown in Fig. 6, the front laminate film 21 and the back laminate film 22 are sealed together to produce the package 10a before filling with contents. At this time, a partition tape 18 is placed in a portion corresponding to the intermediate seal portion 15 that will separate the first chamber 16 and the second chamber 17, and the front laminate film 21 and the back laminate film 22 are sealed together with the partition tape 18 sandwiched between them to produce the package 10a before filling with contents.

[0066] Specifically, as shown in FIG. 6, a first chamber 16 and a second chamber 17 are separated from each other by a central part. With a partition tape 18 interposed in the portion corresponding to the intermediate seal portion 15, the front laminate film 21 and the back laminate film 22 are placed with the sealant layers facing each other, and then heat-sealed using a heat sealer to form the first side seal portion 11, the second side seal portion 12, the intermediate seal portion 15, and the upper temporary seal portion 13a.

[0067] In this embodiment, the partitioning tape 18 has a sealant layer on one side and an easy-peel layer on the other side. More specifically, a base layer made of a plastic film has a sealant layer formed on one side and an easy-peel layer formed on the other side (i.e., a "sealant layer / base layer / easy-peel layer" configuration). For example, the partitioning tape 18 is interposed with the sealant layer facing the front laminate film 21 and the easy-peel layer facing the back laminate film 22, and then sealed to form the intermediate seal portion 15, which can be configured as follows: The partitioning tape 18 and the front laminate film 21 maintain sufficient adhesion due to the adhesion of the sealant layers, while the partitioning tape 18 and the back laminate film 22 can be pseudo-adhered (with low adhesive strength) due to the action of the easy-peel layer.

[0068] This allows the intermediate seal portion 15 to be more easily peeled than the peripheral seal portions (i.e., the first side seal portion 11, the second side seal portion 12, and the upper temporary seal portion 13a). That is, in the peripheral seal portions (i.e., the first side seal portion 11, the second side seal portion 12, and the upper temporary seal portion 13a), the front laminate film 21 and the back laminate film 22 are bonded together via the sealant layer, whereas in the intermediate seal portion 15, the partition tape 18 and the back laminate film 22 are bonded together via a pseudo-adhesion with low adhesive strength via an easy-peel layer, thereby making it possible to easily peel the intermediate seal portion 15.

[0069] Conversely to the above, the partitioning tape 18 may be interposed with the sealant layer side facing the back laminate film 22 and the easy-peel layer side facing the front laminate film 21, and then sealed to form the intermediate seal portion 15. In other words, in this case, sufficient adhesion is maintained between the partitioning tape 18 and the back laminate film 22 by the adhesion of the sealant layers, while a pseudo-adhesion (low adhesive strength) can be achieved between the partitioning tape 18 and the front laminate film 21 by the action of the easy-peel layer.

[0070] The heat sealing temperature when forming the first side seal portion 11, the second side seal portion 12, the upper temporary seal portion 13a, and the intermediate seal portion 15 is preferably 100 to 300°C, more preferably 150 to 280°C, and the heat sealing time is preferably 1 to 15 seconds, more preferably 1 to 5 seconds.

[0071] Furthermore, the partitioning tape 18 is not particularly limited, and it is preferable to use one in which a sealant layer is formed on one side of a base layer made of plastic film and an easy-peel layer is formed on the other side. However, it is preferable to use a stretched film as the plastic film for forming the base layer. By using a stretched film, it is possible to effectively prevent the partitioning tape 18 from stretching even when the pre-filled packaging body 10a is manufactured using a bag making machine, which makes it possible to mass-produce using a bag making machine and improves production efficiency.

[0072] The stretched film forming the base layer of the partitioning tape 18 is not particularly limited, but may be a uniaxial Alternatively, a biaxially oriented polyethylene terephthalate film can be used.

[0073] Furthermore, the sealant layer of the division tape 18 is not particularly limited, but can be made of, for example, the same material as the material constituting the sealant layer of the front-side laminate film 21 or the back-side laminate film 22. In other words, when the sealant layer side of the division tape 18 faces the front-side laminate film 21, it can be made of the same material as the material constituting the sealant layer of the front-side laminate film 21, or when the sealant layer side of the division tape 18 faces the back-side laminate film 22, it can be made of the same material as the material constituting the sealant layer of the back-side laminate film 22.

[0074] Furthermore, the easy-peel layer of the partition tape 18 may be made of a material that provides pseudo-adhesion to the resin that constitutes the sealant layer of the film that faces it, either the front laminate film 21 or the back laminate film 22. Examples of such materials include unstretched polyolefin resin films that have heat-sealing properties and are made of two or more polyolefin resins with different melting points, and a preferred example is an unstretched polyolefin resin film made of a blend resin of polyethylene resin and polypropylene resin.

[0075] The thickness of the base layer of the partitioning tape 18 is not particularly limited, but is preferably 10 to 100 μm, and more preferably 10 to 30 μm. The thickness of the sealant layer of the partitioning tape 18 is not particularly limited, but is preferably 10 to 100 μm, and more preferably 20 to 80 μm. The thickness of the easy-peel layer of the partitioning tape 18 is not particularly limited, but is preferably 10 to 100 μm, and more preferably 30 to 50 μm.

[0076] When forming the upper temporary sealed portions 13a and 13b, heat sealing may be performed with the spout 30 fixed as shown in FIG.

[0077] The partitioning tape 18 may also have easy-peel layers formed on both sides of a base layer made of plastic film (an "easy-peel layer / base layer / easy-peel layer" configuration). In this case, pseudo-adhesion occurs between the front-side laminate film 21 and the easy-peel layer of the partitioning tape 18, and between the back-side laminate film 22 and the easy-peel layer of the partitioning tape 18, so the same effect can be achieved.

[0078] Next, after producing the pre-filled package 10a shown in Fig. 6, the first pre-filled chamber 16a of the produced pre-filled package 10a is filled with a water-reactive compound A, and the lower seal position 14a is heat-sealed to form the lower seal portion 14. After or before filling with the water-reactive compound A, the second pre-filled chamber 17a is filled with a liquid B that is reactive with compound A, and the upper seal position 13b is heat-sealed to form the upper seal portion 13. This results in the two-chamber package 10 shown in Fig. 5.

[0079] The seal widths W1, W2, W3, W4, and W5 of the first side seal portion 11, the second side seal portion 12, the upper seal portion 13, the lower seal portion 14, and the intermediate seal portion 15 are not particularly limited, but are preferably 5 to 50 mm, and more preferably 5 to 30 mm. The width W6 of the partition tape 18 may be larger than the seal width W5 of the intermediate seal portion 15, and is preferably 10 to 60 mm, and more preferably 10 to 40 mm.

[0080] The heat seal strength of the first side seal portion 11, the second side seal portion 12, the upper seal portion 13, and the lower seal portion 14 is preferably 40 N / 15 mm or more, more preferably 40 to 120 N / 15 mm, and even more preferably 40 to 80 N / 15 mm. The heat seal strength of intermediate sealed portion 15 need only be lower than the heat seal strengths of first side sealed portion 11, second side sealed portion 12, upper sealed portion 13, and lower sealed portion 14, but is preferably 5 to 25 N / 15 mm, more preferably 10 to 25 N / 15 mm, and even more preferably 10 to 23 N / 15 mm. By keeping the heat seal strengths of first side sealed portion 11, second side sealed portion 12, upper sealed portion 13, and lower sealed portion 14, and the heat seal strength of intermediate sealed portion 15 within the above ranges, intermediate sealed portion 15 can be made easier to peel than the other sealed portions.

[0081] 5, it is preferable to provide R-shaped seals at intersection 15a between intermediate seal 15 and first side seal 11 and intersection 15b between intermediate seal 15 and second side seal 12. By providing such R-shaped seals, when intermediate seal 15 is peeled, the peeling force of intermediate seal 15 would also peel first side seal 11 or second side seal 12, which would appropriately prevent the contents from being exposed or leaking. The radius of the R-shape is preferably 5 to 50 mm, more preferably 5 to 30 mm, from the viewpoint of optimizing the effect.

[0082] Furthermore, to ensure sufficient adhesive strength, heat sealing may be performed at intersection 15a between intermediate seal 15 and first side seal 11 and intersection 15b between intermediate seal 15 and second side seal 12 using point seals. Specifically, point seals may be used that have a first layer on one side made of the same material as the easy-peel layer of partition tape 18 and a second layer on the other side made of the same material as the sealant layer of the opposing film, either front laminate film 21 or back laminate film 22. The use of point seals ensures sufficient adhesive strength at intersections 15a and 15b.

[0083] Furthermore, the two-chamber package 10 of this embodiment can be used without particular limitations as long as it contains separate substances reactive with other substances, such as compound A reactive with water and liquid B reactive with compound A, and these substances are mixed together at the time of use. For example, an isocyanate compound may be used as compound A reactive with water, and an asphalt emulsion may be used as liquid B reactive with compound A. By using an isocyanate compound and an asphalt emulsion, the two-chamber package 10 can be used as a joint material for road surfaces or as a repair agent for road surfaces. Alternatively, the two-chamber package 10 of this embodiment can also be used as a paint, sealant, adhesive, etc.

[0084] As described above, according to the present invention, by using a liquid-repellent sealant, it is possible to reduce the amount of remaining contents and also shorten the time it takes to drain the contents.

[0085] Although the embodiments of the present invention have been described above, these embodiments are described to facilitate understanding of the present invention and are not described to limit the present invention. Therefore, each element disclosed in the above embodiments is intended to include all design modifications and equivalents that fall within the technical scope of the present invention. [Example]

[0086] The present invention will be described below in more detail with reference to examples, but the present invention is not limited to these examples.

[0087] Example 1 The front laminate film 21 was produced as follows: A 12 μm-thick polyethylene terephthalate film (manufactured by Futamura Chemical Co., Ltd., brand FE2001) and a 7 μm-thick aluminum foil (manufactured by Toyo Aluminum Co., Ltd., brand 8021) were bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand A525), then a 15 μm-thick nylon film (manufactured by Kohjin Film & Chemicals, brand Bonyl W) was bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand A525), and finally a 60 μm-thick liquid-repellent sealant having the following composition was bonded together as a sealant layer using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand A525). Liquid-repellent sealant: (A) Polyolefin resin: Linear low-density polyethylene (LLDPE, product name "Evolue", manufactured by Prime Polymer Co., Ltd.)... 80% by mass (B) Silylated polyolefin: 10% by mass of silylated polyethylene (PE-Si graft copolymer, manufactured by Dow Corning Toray Co., Ltd.) (C) Compatibilizer: propylene and ethylene block copolymer...10% by mass Next, the backside laminate film 22 was produced as follows: A 12 μm-thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GL-RD) and a 12 μm-thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) were bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), a 15 μm-thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 60 μm-thick liquid-repellent sealant similar to that used for the frontside laminate film was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525).

[0088] Next, the compartmentalization tape 18 was produced as follows: A 12 μm thick polyethylene terephthalate film (stretched polyethylene terephthalate film) and a 60 μm thick LLDPE film (FCD-NP, manufactured by Mitsui Chemicals Tohcello) were bonded together using a dry laminating adhesive (Mitsui Chemicals, brand: A525), and then a 50 μm thick easy-peel sealant film (Mitsui Chemicals Tohcello, brand: 680C) was bonded to the polyethylene terephthalate film surface using a dry laminating adhesive (Mitsui Chemicals, brand: A525), thereby producing the compartmentalization tape 18.

[0089] Then, using the front laminate film 21 and back laminate film 22 prepared above, a two-compartment package shown in Figure 5 was produced using a bag making machine according to the method described above. Two sets of contents to be filled were selected, and a predetermined number of two-compartment packages were produced for each. As compound A to be filled in the first chamber 16, a curing agent containing diphenylmethane diisocyanate, an aromatic diisocyanate, as its main component was used. Specifically, as compound A for the first set (referred to as content A), a curing agent for a road repair material (MD Seal, manufactured by Maeda Road Co., Ltd.) was used, and the filling amount was 100 ml. As compound B to be filled in the second chamber 17, the asphalt emulsion of the road repair material was used, and the filling amount was 600 ml.

[0090] For the second set of contents (referred to as "contents B"), specifically, compound A was Saivinol X818-200SK (hardener) manufactured by Saiden Chemical Industry Co., Ltd., and compound B filled in the second chamber 17 was Saivinol X818-200S (main agent) manufactured by Saiden Chemical Industry Co., Ltd., with the filling amounts of compound A being 600 ml and compound B being 82.2 ml. In FIG. 5, L1 = 150 mm, L2 = 340 mm, L3 = 110 mm, W1, W2, W3, W4, W5 = 10 mm, and W6 = 10 mm. The heat sealing conditions were a temperature range of 190 to 220°C, and the conditions for the bag making machine were that the TD direction was from top to bottom in FIG. 5, and the MD direction was from the first side seal portion 11 side to the second side seal portion 12 side in FIG. 5. The partitioning tape 18 was used in such a direction that the LLDPE film side faced the front laminated film 21 .

[0091] <Example 2> The front laminate film 21 and the back laminate film 22 were prepared as follows, and the same films were used as the front laminate film 21 and the back laminate film 22. That is, a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GL-RD) was bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) was bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), a 15 μm thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) was bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 60 μm thick liquid-repellent sealant similar to that used in Example 1 was bonded together as a sealant layer using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), thereby producing a front laminate film 21 and a back laminate film 22.

[0092] Then, a two-compartment package 10 shown in FIG. 5 was produced in the same manner as in Example 1, except that the front laminate film 21 and back laminate film 22 produced as described above were used.

[0093] <Comparative Example 1> The front laminate film 21 and the back laminate film 22 were prepared as follows, using the same material for the front laminate film 21 and the back laminate film 22. That is, a 12 μm thick polyethylene terephthalate film (Futamura Chemical, brand: FE2001) and a 7 μm thick aluminum foil (Toyo Aluminum, brand: 8021) were bonded together using a dry lamination adhesive (Mitsui Chemicals, brand: A525), then a 15 μm thick nylon film (Kojin Film & Chemicals, brand: Bonyl W) was bonded together using a dry lamination adhesive (Mitsui Chemicals, brand: A525), and finally a 70 μm thick LLDPE film (Mitsui Chemicals Tohcello, brand: FCD-NP) was bonded together using a dry lamination adhesive (Mitsui Chemicals, brand: A525), thereby producing the front laminate film 21 and the back laminate film 62.

[0094] Then, a two-compartment package 10 shown in FIG. 5 was produced in the same manner as in Example 1, except that the front laminate film 21 and back laminate film 22 produced as described above were used.

[0095] <Comparative Example 2> The same film as in Comparative Example 1 was used as the front laminate film 21. The back laminate film 22 was produced as follows: A 12 μm-thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GL-RD) and a 12 μm-thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) were bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), then a 15 μm-thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 70 μm-thick LLDPE film (manufactured by Mitsui Chemicals Tohcello, brand: FCD-NP) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), thereby producing the back laminate film 22.

[0096] Then, a two-compartment package 10 shown in FIG. 5 was produced in the same manner as in Example 1, except that the front laminate film 21 and back laminate film 22 produced as described above were used.

[0097] <Comparative Example 3> The front laminate film 21 and the back laminate film 22 are made to have the same structure as follows. That is, a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GL-RD) and a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) were bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), then a 15 μm thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) was bonded to them using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 50 μm thick easy-peel sealant film (manufactured by Mitsui Chemicals Tohcello, brand: 680C) was bonded to them using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), thereby producing front laminate film 21 and back laminate film 22.

[0098] Next, the compartmentalization tape 18 was produced as follows: A 50 μm thick easy-peel sealant film (manufactured by Mitsui Chemicals Tohcello, brand: 680C) and a 12 μm thick polyethylene terephthalate film (stretched polyethylene terephthalate film) were bonded together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), and then another 50 μm thick easy-peel sealant film (manufactured by Mitsui Chemicals Tohcello, brand: 680C) was bonded to the polyethylene terephthalate film surface using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), thereby producing the compartmentalization tape 18.

[0099] Then, a two-chamber package 10 shown in Figure 5 was manufactured in the same manner as in Example 1, except that the front laminate film 21, back laminate film 22, and partition tape 18 manufactured as described above were used.

[0100] <Comparative Example 4> The same film as in Comparative Example 1 was used as the front laminate film 21. The back laminate film 22 was produced as follows: A 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) and a 15 μm thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) were laminated together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), and then a 70 μm thick LLDPE film (manufactured by Mitsui Chemicals Tohcello, brand: FCD-NP) was laminated together using a dry laminating adhesive (manufactured by Mitsui Chemicals, brand: A525), thereby producing the back laminate film 22.

[0101] Then, a two-compartment package 10 shown in FIG. 5 was produced in the same manner as in Example 1, except that the front laminate film 21 and back laminate film 22 produced as described above were used.

[0102] <Comparative Example 5> The front laminate film 21 was produced as follows: a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GL-RD) and a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) were bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), then a 15 μm thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 70 μm thick LLDPE film (manufactured by Mitsui Chemicals Tohcello, brand: FCD-NP) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525).

[0103] Next, the backside laminate film 22 was produced as follows: A 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) and a 15 μm thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) were bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 70 μm thick LLDPE film (manufactured by Mitsui Chemicals Tohcello, brand: FCD-NP) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525) to produce the backside laminate film 22.

[0104] Then, a two-compartment package 10 shown in FIG. 5 was produced in the same manner as in Example 1, except that the front laminate film 21 and back laminate film 22 produced as described above were used.

[0105] <Comparative Example 6> The front laminate film 21 and the back laminate film 22 were prepared as follows, using the same material for the front laminate film 21 and the back laminate film 22. That is, a 12 μm thick transparent vapor-deposited polyethylene terephthalate film (manufactured by Toppan Printing, brand: GX-P) and a 15 μm thick nylon film (manufactured by Kohjin Film & Chemicals, brand: Bonyl W) were bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), and finally a 70 μm thick LLDPE film (manufactured by Mitsui Chemicals Tohcello, brand: FCD-NP) was bonded together using a dry lamination adhesive (manufactured by Mitsui Chemicals, brand: A525), thereby producing the front laminate film 21 and the back laminate film 22.

[0106] Then, a two-compartment package 10 shown in FIG. 5 was produced in the same manner as in Example 1, except that the front laminate film 21 and back laminate film 22 produced as described above were used.

[0107] The structure of each film in each example and comparative example is summarized in Table 1.

[0108] [Table 1]

[0109] <Evaluation> Examples 1 and 2 and Comparative Examples 1 to 6 were evaluated as follows.

[0110] (Measurement of water vapor permeability) The water vapor permeability of the front laminate film 21 and the back laminate film 22 was measured at a temperature of 40°C and a relative humidity difference of 90% (test period: 3 months) in accordance with JIS K7129-7. For the evaluation, the result of the front laminate film 21 or the back laminate film 22 with the larger water vapor permeability value was used. The results are shown in Table 2.

[0111] (visibility of contents) The contents filled in the first chamber 16 and the second chamber 17 were visually confirmed. If the color of the contents could be determined, it was evaluated as ◯, and if it could not, it was evaluated as ×. The results are shown in Table 2.

[0112] (Check for cloudiness of isocyanate) The two-compartment package 10 was stored for three months in a thermostatic chamber at a temperature of 30°C and a relative humidity difference of 80%, and the cloudiness of the curing agent filled in the first compartment 16, which was primarily composed of diphenylmethane diisocyanate, an aromatic diisocyanate, as compound A, was checked after three months. It can be concluded that the cloudiness was due to a reaction with water vapor, resulting in a decrease in reactivity. The results are shown in Table 2.

[0113] (Measurement of heat seal strength) Measurements were carried out on the circumference and the easy-peel tape insertion area at a peel angle of 90° and a pulling speed of 300 mm / min in accordance with JIS Z 1707. The results are shown in Table 2.

[0114] (Contents discharge time) The two-compartment package 10 filled with the contents was kneaded by hand for 30 seconds to remove the partition tape 18, and the compound A filled in the first compartment 16 and the compound B filled in the second compartment 17 were mixed together. The container 30 was opened and pointed downward, and the contents were allowed to flow out naturally. The time until the flow stopped naturally was measured and taken as the content discharge time. The results are shown in Table 2.

[0115] (remaining contents) The weight of the remaining contents was measured for the two-compartment packages 10 in which the natural leakage of the contents had stopped in the above test. The results are shown in Table 2.

[0116] [Table 2]

[0117] As shown in Table 2, the two-compartment packages of Examples 1 and 2 exhibited properties equivalent to or better than those of the comparative examples in terms of water vapor permeability, visibility, opacity, and heat seal strength, while the time required for content discharge was reduced to about two-thirds of that of the comparative examples for both Content A and Content B, confirming the effectiveness of the improvements. It was also confirmed that the amount of remaining content could be reduced by about 20% compared to the comparative examples. [Explanation of symbols]

[0118] 10...2-chamber packaging 11 First side seal portion 12 Second side seal 13 Upper seal 14 Lower seal 15. Intermediate seal 16...Room 1 17...Room 2 18. Partition tape 20, 20b...Laminated film 21. Front laminated film 22 Backside laminated film 23...Base material layer 24. Sealant layer 25. Barrier layer 30···Spout 31...Support rod

Claims

1. A two-chamber package in which the interior is sealed by sealing a first laminate film and a second laminate film together to partition the first chamber into a first chamber in which a first content is enclosed and a second chamber in which a second content is enclosed, The first laminate film and the second laminate film each have at least a base layer made of a plastic film and a sealant layer, The first chamber and the second chamber are partitioned by a peripheral seal portion formed on the peripheral edge of the two-chamber package and an intermediate seal portion that partitions the first chamber and the second chamber, At least one of the first laminate film and the second laminate film is a laminate film provided with visibility that allows contents to be confirmed, and both the first laminate film and the second laminate film have a water vapor permeability of 0.1 g / m or less as evaluated by JIS K7129-7 (calcium corrosion method). 2 / day or less, the sealant layer comprises a resin composition for forming a liquid-repellent layer, the resin composition comprising (A) a polyolefin resin, (B) a silylated polyolefin, and (C) a compatibilizer; the polyolefin moiety of the (B) silylated polyolefin is incompatible with the (A) polyolefin resin, the (C) compatibilizer has a moiety compatible with the (A) polyolefin resin and a moiety compatible with the (B) silylated polyolefin, The intermediate seal portion is more easily peeled than the peripheral seal portion, the first content is a substance that shows a reaction when mixed with or comes into contact with another substance, the second content is a liquid that is reactive with the first content, the base material layer of each of the first laminate film and the second laminate film has a nylon film as a layer closest to the sealant layer; the first laminate film and the second laminate film are heat-sealed at a position that separates the first chamber and the second chamber, with a partition tape interposed therebetween and with the sealant layers facing each other, thereby forming the peripheral seal portion and the intermediate seal portion; the partition tape includes a sealant layer and an easy-peel layer, and is arranged so that the sealant layer of the partition tape is located on the surface facing the first laminate film or the surface facing the second laminate film, and the easy-peel layer is located on the other surface; The sealant layer of the partition tape is a two-chamber package having a polyethylene film and a polyethylene terephthalate film in this order toward the easy-peel layer side.

2. A two-chamber package in which the interior is sealed by sealing a first laminate film and a second laminate film together to partition the first chamber into a first chamber in which a first content is enclosed and a second chamber in which a second content is enclosed, The first laminate film and the second laminate film each have at least a base layer made of a plastic film and a sealant layer, The first chamber and the second chamber are partitioned by a peripheral seal portion formed on the peripheral edge of the two-chamber package and an intermediate seal portion that partitions the first chamber and the second chamber, At least one of the first laminate film and the second laminate film is a laminate film provided with visibility that allows contents to be confirmed, and both the first laminate film and the second laminate film have a water vapor permeability of 0.1 g / m or less as evaluated by JIS K7129-7 (calcium corrosion method). 2 / day or less, the sealant layer comprises a resin composition for forming a liquid-repellent layer, the resin composition comprising (A) a polyolefin resin, (B) a silylated polyolefin, and (C) a compatibilizer; the polyolefin moiety of the (B) silylated polyolefin is incompatible with the (A) polyolefin resin, the (C) compatibilizer has a moiety compatible with the (A) polyolefin resin and a moiety compatible with the (B) silylated polyolefin, The intermediate seal portion is more easily peeled than the peripheral seal portion, the first content is a substance that shows a reaction when mixed with or comes into contact with another substance, the second content is a liquid that is reactive with the first content, the base material layer of each of the first laminate film and the second laminate film has a nylon film as a layer closest to the sealant layer; The base material layer of the second laminated film is a two-chamber package having, in this order toward the sealant layer, a first polyethylene terephthalate film, a second polyethylene terephthalate film, and the nylon film.

3. 3. The two-chamber package according to claim 1, wherein the first content contains one or more of an isocyanate-based compound, an epoxy-based compound, an aziridine-based compound, a melamine-based compound, an aldehyde-based compound, and an amine-based compound.

4. 4. The two-chamber package according to claim 1, wherein the first chamber or the second chamber is formed with a spout for pouring the contents to the outside.

5. The two-chamber package described in claim 2, wherein the first laminate film and the second laminate film are heat-sealed at a position that separates the first and second chambers, with a partition tape interposed between them and the sealant layers facing each other, thereby forming the peripheral seal portion and the intermediate seal portion, and the partition tape has a sealant layer and an easy-peel layer, and is arranged so that the sealant layer of the partition tape is located on the side facing the first laminate film or the side facing the second laminate film, and the easy-peel layer is located on the other side.

6. 6. A two-compartment packaging body according to claim 1 or 5, wherein the easy-peel layer of the partition tape is a layer formed of a heat-sealable, unstretched polyolefin resin film composed of two or more polyolefin resins with different melting points.

7. 7. A two-compartment package according to claim 5, wherein the sealant layer of the partition tape comprises a polyethylene film and a polyethylene terephthalate film in this order facing the easy-peel layer.

8. 8. The two-chamber package according to claim 1, wherein the peripheral seal portion has a seal strength of 40 N / 15 mm or more, and the intermediate seal portion has a seal strength of 5 to 25 N / 15 mm.

9. A two-chamber package according to any one of claims 1 to 8, wherein the base layer of the first laminated film has, facing the sealant layer side, a polyethylene terephthalate film, aluminum foil, and the nylon film in this order, or has a first polyethylene terephthalate film, a second polyethylene terephthalate film, and the nylon film in this order.

10. A two-chamber package according to any one of claims 1 to 8, wherein the base layer of the second laminated film has, in this order toward the sealant layer, a first polyethylene terephthalate film, a second polyethylene terephthalate film, and the nylon film.

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