TW200844012A - Packaging container - Google Patents

Abstract

To provide a package vessel showing excellent re-bonding strength and sealability and capable of being easily re-sealed. The package vessel 1 includes a vessel body 2 having a recess 21 in which a content P is housed and having an approximately rectangular shape in a plan view. A cover material 3 clogging an opening 22 is fitted to the vessel body and is heat-sealed to a flange part 23 arranged in the peripheral edge of the opening to form a seal part 24. The vessel body is formed of a multi-layered sheet 25 made of a base material layer 253 containing a heat seal layer 251, an adhesive layer 252, and a gas barrier layer 2531. The cover material is formed of a multi-layered sheet 34 composed of a heat seal layer 341, an adhesive layer 342, and a base material layer 343. When the package vessel is opened, the adhesive layer is exposed, and the package vessel can be re-sealed by re-bonding the exposed adhesive layer.

Description

200844012 IX. Description of the invention: [Technical field to which the invention pertains] The present invention relates to a package for loading and unloading a container body and a cover material * π

[Prior Art] H Previously, there was a packaging container as a packaging form for the 忭 忭 忭 , , , , , , , , , , , , , , , , , , , , 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘 凸缘The part is sealed with a film-like cover material to seal the package. In the packaging container, when the stored food 4 is taken out, the lid member is peeled off from the container body. < In addition, in order to prevent the contents from drying out or to prevent leakage of the contents (4), it is more reasonable to reseal the containers that have been temporarily opened. For example, the document (Japanese Patent Publication No. Sho 50-37598) discloses a method in which a container formed of a multilayer sheet of a heat seal layer/adhesive layer/base material layer is sealed with a lid member by heat sealing. When the container is unsealed, the adhesive layer is exposed and resealable. However, in the case of the container disclosed in the above document, since the cover material is a soft composite film, when it is temporarily opened and then re-attached, it may cause an enemy on the cover material of the subsequent portion of the container. Worse. Because the sensible stagnation = does not start, it is in the continuation, it will destroy the sealing performance, and as time goes by, the adhesive layer of the _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ Keeping the above-mentioned part and the joint close can not proceed. - There is also a deviation between the adhesive layer of the day-to-day road and the subsequent position, resulting in weaker strength of the re-connector. When the composite film is used as a cover material, in many cases, the 127238.doc 200844012 residual '- portion and the container are followed by the opening portion, but if the opening is greatly opened after opening, it is easy to generate the position again. Deviation. When the cover material is completely peeled off from the container, it is very difficult to carry out the same position as before the peeling, resulting in a decrease in strength and sealing property. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a packaging container which is excellent in strength and sealing property and which can be easily resealed. [Description of the Invention] The package of the present invention includes a container body having a flange portion formed on a periphery of the opening portion, and a lid member that blocks the opening portion and is detachably provided to the container body, and Sealing the sealing portion with the flange portion; wherein: the container body or the lid member is provided with: (4), and at least one of the container body or the lid member Sealed by a sealing surface; an adhesive layer disposed adjacent to the heat sealing layer; and a substrate layer forming an appearance of the container body or the cover material, wherein at least one of the container body and the cover material comprises a cover The material is fitted into the fitting portion of the container body; the adhesive strength between the adhesive layer and the base material layer is less than the adhesive strength between the adhesive layer and the heat seal layer, and the heat seal layer and the sealed surface are adhered to The strength has the strength that the above-mentioned adhesive layer and the above-mentioned substrate layer can be further adhered to. In the present invention, the stem body is fitted with the lid member to close the packaging container, and is sealed by the sealing portion. Further, either one of the container body and the lid member is formed of a multilayer sheet in which at least a heat seal layer, an adhesive layer and a base material layer are laminated, and the heat seal layer forms a seal portion with the other sealed surface. In the subsequent strength between the layers, the adhesion between the adhesive layer and the base layer is minimal, and when the interlayer is peeled off, the adhesive layer is exposed. The container is resealed by the = layer and the substrate layer and the substrate layer. θ The adhesive layer root exposed by Μ: According to the present invention, since the container body and the cover body have the container body and the cover material, the mouth coating is now inconsistent with the degree of rigidity, such as 卜, +, 死红肷& . (3) As described in the Canadian literature, the wrinkles enter a gap. Therefore, when resealing, the corrugated groove = sealed cover material. Correction - "Bo + into the next part, the adhesive material of the adhesive f will not deteriorate" to maintain quality. Further, since the adhesive layer and the base material layer can be made uniform, the container can be reliably sealed, and the packaging container can be sealed. Further, since only the container body and the lid member are fitted into the lid, the positioning of the adhesive layer and the substrate layer can be reliably maintained, and the strength and sealing property of the joint can be reliably maintained. Furthermore, it is also possible to maintain a beautiful appearance without wrinkles. In the present invention, it is preferred that the adhesive layer comprises at least three glial copolymers having the present ethylene oxime segment and the diene block, and a tackifying resin. (2) According to Benming, the resin used in the adhesive layer contains a colloidal copolymer containing a styrene segment and a diene segment, and a tackifying resin, and thus has a bonding strength. Therefore, when the fitting is performed again after the opening, the strength is good, and the inside of the container can be kept in a sealed state, and the quality of the two contents can be maintained for a longer period of time. In some cases, I^, in order to further improve the bonding strength, it is preferable to add a plasticizer to this. - In the packaging container of the present invention, it is preferred that the above-mentioned container body and the above-mentioned "" soil layer include polyethylene (ΡΕ), polypropylene (ΡΡ), nylon (Ny), 127238.doc 200844012 At least one of ethylene glycol diacetate (pET), polybutylene terephthalate (ρΒτ), and polyethylene naphthalate (ΡΕΝ). According to the present invention, since the above-mentioned resin is used for the base material layer of the container body and the lid member, it has rigidity to the extent that it can be fitted to each other. Further, these resins are excellent in thermoformability and are easy to process. In the packaging container of the present invention, it is preferable that a gas barrier layer is provided as the intermediate layer on the base material layer of either one of the combiner body and the cover member on which the adhesive layer is provided. According to the invention, since the gas barrier layer is provided on the base material layer, gas barrier properties can be imparted to the package grain, and the quality of the contents can be maintained for a longer period of time. Examples of the resin to which the emulsification resistance is given include ethylene-vinyl alcohol copolymer (ev〇h) resin or nylon MXD6. In the packaging container of the present invention, it is preferred that the gas barrier layer comprises an ethylene-vinyl alcohol copolymer (EVOH). According to the invention, EV〇H is used in the gas barrier layer. In particular, in the case of EVOH having a melting point of 190 C or less, coextrusion fluidity at the time of production is excellent, and therefore it is preferable. Further, since EVOH has a high surface hardness, it is preferably provided adjacent to the adhesive layer even in the base material layer. Thereby, at the time of heat sealing, the heat seal layer and the # occupyer layer are lost to the edge of the ceremony and the seal ring and the gas barrier layer is thinned. Therefore, at the time of opening, it is perfectly peeled off from the position where the heat seal layer and the adhesive layer are thinned. Further, since the EVOH is smooth and shiny, the interface of the peeled portion is also smooth and the exposed surface is beautiful. In the packaging container of the present invention, preferably, the funnel portion includes a fitting convex portion of the fitting recess portion of the main body and the lid member of the container 127238.doc 200844012. According to the present invention, since the fitting concave portion of the container body and the fitting convex portion of the lid member are intended to be joined, the positioning of the exposed surface of the adhesive layer and the substrate layer can be easily performed only by such fitting. Therefore, the packaging container can be easily resealed 0. [Embodiment] Hereinafter, embodiments of the present invention will be described based on the drawings. In each implementation

In the following, the description of the components having the same reference numerals will be omitted or simplified. [First Embodiment] Fig. 1 is a perspective view showing a sealed state of a packaging container according to a first embodiment, Fig. 2 is a cross-sectional view taken along line ΙΙ-Π of Fig. 1, and Fig. 3 is an enlarged view of an essential part of an unsealed state of Fig. 1. In Fig. 1, the packaging container 1 is provided with a container body 2 in which the contents P are housed in a substantially rectangular shape on the plane of the concave portion 2''. The recessed portion 21 is constituted by a bottom portion 21 which forms the bottom of the container body 2, and an outer wall 216 which is erected from the bottom portion 21, and a flange portion 23 is disposed along the periphery of the opening portion 22 of the recess portion 21. The outer wall 21B protrudes in a strip shape along the periphery of the opening portion 22, and is formed with a fitting recessed portion 211 for fitting with the lid member 3 when the lid member 3 is closed. Further, the packaging container 1 is provided with a lid member 3 for blocking the opening portion 22 of the container body 2. As shown in FIG. 1 and FIG. 2, a fitting convex portion 3 1 having a substantially rectangular shape is formed in a central portion of the lid member 3, and the fitting convex portion 31 is fitted to the fitting concave portion 211 of the container body 2, A flange portion 32 that is in close contact with the flange portion 23 of the container body 2 is disposed on the periphery of the convex portion 31. Further, the flange portion 32 is formed by the flat plate portion 321, the peripheral edge portion 322, and the end edge portion 323, and is fitted to the convex portion 127238.doc -10- 200844012:23 of the container body 2, wherein the flat plate portion 32i and the container are The flange of the main body 2 and the peripheral edge portion 322 of the mountain member are curved from the flat plate portion 321f so as to cover the end surface A of the flange portion 容器 of the container body 2, and the end edge portion (2) protrudes outward from the peripheral edge portion. On the lid member 3, a grip portion 35 that can be gripped at the time of opening is formed so as to protrude outward. In the mountain container packaging 1, the fitting convex portion 31 of the lid member 3 is fitted to the melon of the container body. The recess 211' and the packaging container 丨 are provided with a flange portion to be fitted to the flange portion to form a rear portion. Further, the flange portion 32 of the lid member 3 is adhered to the flange portion 23' of the container body 2, and is sealed by the sealing portion 24 in a state where the lid member 3 and the container body 2 are heat-sealed. It recognizes that the layer structure of the valley state body 2 is explained. As shown in FIG. 2, the container body 2 is formed of a multilayer sheet 25 composed of a heat seal layer 251, an adhesive layer 252, and a base material layer 253, wherein the base material layer 253 is composed of a gas barrier layer 253 1 and then The layer 2533 and the thermoplastic resin layer 2532 are formed. The gas barrier layer 253 1 is disposed adjacent to the adhesive layer 252. As the material of the heat seal layer 25 1 , polyethylene (pE), polypropylene (pp), polyethylene terephthalate copolymer (pET-G), polybutylene terephthalate (PBT) special material is selected. Among them, a material having a melting point lower than the melting point of the resin used in the base material layer 253 described below. The adhesive material used in the adhesive layer 252 contains two or more components selected from the group consisting of a gum block copolymer containing a styrene oxime segment and a diene block, a tackifying resin, and a plasticizer. A gum block copolymer comprising a styrene block and a diene block, also comprising a gum block hydrogenated copolymer comprising a styrene block and a diene block. 127238.doc 200844012 For example, a block copolymer of a polystyrene block and an ethylene-polyisoprene block bond, a polystyrene block and a mixture of B = can be cited. , polystyrene block and ethylene _ □ 222, "(four) Duan Che, polystyrene smear and ethylene: dilute: = abundance and bonding of the yoke segment copolymer, etc. The tackifying resin may, for example, be a hydrogenated (tetra)f _ fat, a hydrogenated terpene resin, a C5.C6 olefinic petroleum resin, etc. (10) a fat resin, an alicyclic ί: if it contains a styrene block and two It is preferable to add a plasticizer to the thickening resin to form three kinds of components. As A plasticizer, as a plasticizer, for example, liquid paraffin, :: treatment oil (aromatic, ring (four), or stone "oil smoke"), synthetic, straw can be copolymerized by gummy block The adhesive, the tackifying resin and the plasticizer are mixed: and the adhesive layer 252 is produced by smelting. Preferably, the plasticizer is injected from the uniaxially extruded branch to manufacture. If L-, and 'f are introduced into the plasticizer from the uniaxial extruder, the cost of the extruder is low. The injection amount of θ & 殳 plasticizer can be easily adjusted to follow the plastic:: adhesive material in the range that does not affect its characteristics, in addition to the above filling can also contain antioxidants, talcum powder, carbon dance and other inorganic Filling agent, foaming agent, coloring agent such as titanium oxide, and the like. Ben: The adhesion used in the form is deleted, and the mixture contains the lower (Α), (8). 127238.doc •12- 200844012 (A) A gum block copolymer (la) consisting of a block structure mainly containing a stupid ethylene block and a diene block, or having a polystyrene-polyisoprene diuret Particles composed of (2) viscous tree (B) consisting of a gum block copolymer mainly composed of a block of stupid and dilute segments or a block of polystyrene-polyisoprene (lb) Particles constituting the plasticizer (3) In the adhesive material of the present embodiment, in addition to the above-mentioned particles (A) and (B), if the following particles (C) are further mixed, the gelatin can be adjusted. The blending ratio of the segment copolymer, the tackifying resin, and the plasticizer is preferred so that the physical properties can be changed corresponding to the requirements of the adhesive material. (C) a gum block copolymer (丨c) mainly comprising a styrene block and a diene block or a block structure of polystyrene·polyisoprene as a gum block copolymer (丨) c), the same copolymer as the gum block copolymer (1 a) or (1 b) can be used. Further, a copolymer different from the gum block copolymer (la) or (lb) may also be used. In view of ease of adjustment of physical properties, a copolymer different from the gum block copolymer (la) or (lb) is preferred. Here, the difference is that the hardness can be determined by the hardness of JIS κ_6253. The gum block copolymer (la) preferably has a hardness of 36 or more of JIS κ_6253. If the hardness of the gum block copolymer (la) is not full (softer), it will be sticky, and the extrusion process is unstable, making it difficult to granulate. For example, when an elastomer having a hardness of less than 36 is used for a masterbatch of petroleum resin or oil, it is difficult to handle. Further, in view of good adhesion, the hardness of the gum block copolymer (lc) is preferably 36 or less. If the hardness of the gum block copolymer 127238.doc 200844012 (lc) exceeds 36, the adhesive properties deteriorate. Thus, by mixing different dendrimer block copolymers, not only the effect of easily adjusting the above physical properties but also the strength of re-adhesion can be improved. Further, granulation may be carried out by adding an antioxidant, a lubricant or the like in advance without affecting the properties of the gum block copolymer (la) (lb) (lc). An acetamethylene glycol copolymer (ev〇h) resin can be used in the resist layer 253 1 . In particular, EVOH having a melting point of 190 ° C or less is suitable for coextrusion fluidity with an adhesive material used in the adhesive layer 252. In addition, nylon MXD6 can also be used. In the case of nylon MXD6i, amorphous nylon may also be included. % To improve the adhesion of the gas barrier layer 253 1 to the thermoplastic resin layer 2532, it is preferable to provide the adhesive layer 2533 between the above layers. Examples of the constituent material include an urethane-based or styrene-based elastomer, maleic anhydride-modified polypropylene, and ethylene-vinyl acetate (EVA). The thermoplastic resin layer 2532 is a layer which is formed on the outside of the container body 2. The constituent material may be olefin resin such as polyethylene or polypropylene (pp), nylon (Ny) or polyethylene terephthalate (pet). a single layer of sheet or laminated sheet of polybutylene terephthalate (PBT), polyethylene naphthalate (PEN) and blends of such materials, and optionally having a higher melting point than the heat seal layer 2 The resin of the melting point of the resin used in 5 1 . The resins are co-extruded, dry laminated, extrusion laminated, extrusion coated, or a combination of such treatments, whereby a heat seal layer 251 / adhesive layer 252 / substrate layer 253 (including gas barrier) can be fabricated Layer 2531) constitutes a multilayer sheet 25. Furthermore, the thickness of each layer can be adjusted by the thickness of each layer, the resin selection or blending ratio, etc., and the strength of the layers 127238.doc -14-200844012 can be adjusted. In the present embodiment, between the adhesive layer 252 and the gas barrier layer 253 ι The intensity is then less than the subsequent strength between the other layers. The multilayer sheet obtained in the above manner is formed into the shape of the container body 2 by thermoforming. The thermoforming is carried out by a known method such as vacuum forming, direct air heating, air pressure forming, plug assist vacuum forming, and plug assist air pressure forming of the sheet. Next, the layer structure of the cover material 3 will be described. The coffin 3 is a laminated body composed of a plurality of layers, and is formed by a multilayer sheet 34. The multilayer sheet 34 is composed of a heat seal layer 341, an adhesive layer 342, and a base material layer 343. The heat seal layer 341 can be used with the container body 2. The resin used in the heat seal layer 341 is the same, and the resin which is adhered to the heat seal layer 341 of the container body 2 is selected to be strong. The purpose of the adhesive layer 3 42 is to increase the heat seal layer 341 and the base material layer μ] The constituent materials include urethane-based or styrene-based elastomer H-maleic anhydride-modified polypropylene and ethylene-acetic acid-ethyl acetate (EVA).

The base material layer 3 4 3 is formed on the outer layer of the π匕 surface, and is composed of the same material as the base material layer 253 of the container body 2. The multilayer sheet 34 laminated with the above layer can be produced by co-extrusion, folding screen, hopper, field, layer dry layer, etc., and further, it is also manufactured by combining the above layers for the segment. The above multilayer sheet 34. In the same manner, the lid member 3 is formed by vacuum plugging, air pressure forming, or the like, followed by shaping of the container body 2, air pressure forming, and plug-assisted vacuum forming, 127238.doc 15 200844012.矣k, the coffin 3 is placed in such a manner as to block the opening 22 of the formed body 2, so that the rear projection 31 is engaged with the coupling recess 211, and the flange portion and the flange are formed. The part 2 3 is squashed so that the closure can be closed six times. Further, in order to seal the package to 1, the flange portion 23 is heat-sealed. The convex portion 32 of the material 3 is adhered to the flange portion 23 of the container body 2': the heat sealing tooth is pressed against the flange portion η from above the coffin 3, thereby aligning

The body 2 and the lid member 3 are sealed, and the seal portion 24 is formed between the heat sealed container body 2 and the lid member 3. The heat seal strength is stronger than the adhesion strength of the adhesive layer 252 of the multilayer sheet 25 and the gas barrier layer 253 i , and the adhesion strength of the heat seal layer 251 and the adhesive layer 252. The heat-sealing strength can be adjusted according to the heat-sealing conditions such as temperature, pressure, time, and the thickness of each layer, and the resin. Thereby, the packaging container 1 is sealed by heat sealing. The opening method and the unsealing state of the above-described configuration are described with reference to Fig. 3, which is the same as the opening and closing method. ^ Grab the grip portion 35 of the lid member 3 and pull it toward the separation container body 2 and the lid member, whereby the package container can be unsealed. At this time, the heat seal layer 251 and the adhesive layer 252 are broken in the vicinity of the end portion of the seal portion 24 having weak strength in accordance with the relationship between the strength of the heat seal and the adhesion strength between the layers. Then, interlayer peeling occurs between the adhesive layer 252 and the gas barrier layer 253 1 to expose the adhesive layer 252 and the gas barrier layer 2531 (this is referred to as the exposed faces 25 2A and 253 A). When resealing is performed, the exposed surface 252A of the adhesive layer 252 is pressure-bonded to the exposed surface 253A of the gas barrier layer 253 1 , whereby the packaging container 1 can be subjected to 127238.doc -16- 200844012

The exposed surface 252A of the adhesive layer 252 is aligned with the gas barrier layer 253 1 253A, and the packaging container i can be resealed by crimping. . Therefore, when the surface is easily exposed, the sealing portion 24 is opened when the opening and closing of the package is resealed. (2) When the lid member 3 has a certain degree of rigidity, the lid member 3 does not wrinkle. Therefore, wrinkles are not generated, and the sealing property is improved. Further, the entire surface of the exposed surface 252A of the adhesive layer 252 is adhered to the entire surface of the exposed surface 253a of the gas barrier layer 253 1 , and the adhesive material is not exposed to the outside, so that the adhesive strength of the adhesive layer 2 5 2 can be maintained. The material will not deteriorate. (3) As described above, since the lid member 3 has rigidity, the lid member 3 does not wrinkle, so that the packaging container 1 can be provided beautifully. (4) In the present embodiment, since the shape of the fitting convex portion 31 is provided at the center portion of the lid member 3, when the packaging container 丨 is stacked in sections, the bottom of the packing group 1 of the upper stage is accommodated in the lower stage. The fitting convex portion 3 of the packaging container 1 is so that the packaging container 1 of the upper stage does not deviate from the packaging container 1 of the lower stage. Therefore, even when piled up, it is not easy to collapse, and it is easy to handle during display in the shelf or distribution. (5) In the present embodiment, a gas barrier layer 2531 made of EV〇H is provided adjacent to the layer 252 of the adhesive 127238.doc 200844012 in the multilayer sheet 25 of the container body 2. Since the surface hardness is high, the heat seal layer 205 and the adhesive layer Μ are thinned between the edge of the heat seal tooth and the gas barrier layer 2531. Thereby, when the packaging container 1 is unsealed, the heat seal layer (5) and the adhesive layer 252 in the vicinity of both end edges of the sealing portion 24 are not elongated and are perfectly broken, and the adhesive layer 252 and the gas barrier layer 2531 are peeled off. Further, since the EV 〇 H is smooth and shiny, the EV0H can be smoothly peeled off, and the exposed surface 252a and the exposed surface 253A can be made beautiful. [Second Embodiment] Fig. 4 is a cross-sectional view showing a packaging container according to a second embodiment. Fig. 2 is an enlarged view of an essential part showing an unsealing state of the packaging container according to the second embodiment. In the second embodiment, the layer structure of the container body and the lid member according to the first embodiment is reversed, and the adhesive layer is provided on the lid member. Further, in the second embodiment, the fitting recess is not provided in the container body, and the fitting member is not provided with the fitting convex portion. The packaging container according to the second embodiment is attached to the flange portion and the lid of the container body. A fitting portion is formed at one of the convex portions of the material. The details will be described below. In Fig. 4, the packaging valley is a container body 2 having a substantially rectangular shape in which the contents are accommodated in the concave portion 21. The recessed portion 21 is formed by a bottom portion 21 which forms the bottom of the container body 2, and an outer wall 21; 8 which is erected from the bottom portion 21, and a flange portion 23 is disposed along the periphery of the opening portion 22 of the recess portion 21. Further, the packaging container 1 is provided with a lid member 3 for blocking the opening portion u of the container body 2, and as shown in Fig. 4, a peripheral portion of the lid member 3 is disposed with the flange portion 23 of the container body 2. The convex edge portion 32 is dense. Further, the flange portion 32 is formed by a flat plate portion 127238.doc -18-200844012 321 , a peripheral edge portion 322, and an end edge portion 323, wherein the flat plate portion 32 ι is adhered to the flange portion 23 of the container body 2, and the peripheral edge The portion 322 is bent from the flat plate portion 32 ι so as to cover the end surface 23A of the flange portion 23 of the container body 2 ′, and the end edge portion 323 protrudes further outward from the peripheral edge portion 322 . Further, a gripping portion (not shown) that can be gripped at the time of opening is formed on the lid member 3 so as to protrude outward. In the packaging container ,, the opening portion 22 is blocked by the lid member 3', and the fitting portion is formed such that the flange portion 32 is fitted to the flange portion 23. Thereby, the flange portion 32 of the lid member 3 is adhered to the flange portion 23 of the container body 2, and is further sealed by the sealing portion 24 in a state where the lid member 3 and the valley member 2 are heat-sealed. The composite body 2' is formed by a multilayer sheet 25 composed of a heat seal layer 251, an adhesive layer 255, and a base material layer 253. The cover material 3 is formed of a multilayer sheet 34, and the multilayer sheet 34 is composed of The heat seal layer 341, the adhesive layer 344, and the base material layer 343 are formed of a gas barrier layer 343 1 and a thermoplastic resin crucible 32, and the gas barrier layer 343 1 is disposed adjacent to the adhesive layer 344. For the multilayer sheet 34, the adhesion strength between the adhesive layer (4) and the gas barrier layer 343 1 is smaller than the adhesion strength between the other layers. Further, as the material of each layer, the same material as that of the user in the above-described first embodiment can be used. The opening portion 22 is blocked by the lid member 3', so that the flange portion of the lid member 3 is corrected to be in a state in which the flange portion 23 of the body 2' is in close contact with each other, and the heat sealing teeth are provided from above the lid member Pressing to the flange portion 23, thereby forming a seal between the container body and the lid member 3, the heat-sealed container body 2, and the lid member 3, "based on temperature, pressure, The heat-sealing conditions such as time and the thickness of each layer, 127238.doc -19-200844012 degrees, resin selection, etc., adjust the adhesion strength of the heat seal. Thereby, the packaging container 密封 is sealed by heat sealing. The packaging container 丨, the unsealing method and the unsealing shape are described. The grasping portion of the J^ material 3 is grasped, and the separation container body 2 is pulled in the direction of the lid member 3, thereby allowing the packaging container to be smashed. At this time, according to the relative relationship between the strength of the heat seal and the adhesion strength between the layers, the heat seal layer 341 and the adhesive layer 344 are broken in the vicinity of the end portion of the seal portion 24 having weak strength. Then, the adhesive layer 344 is attached. Inter-layer peeling occurs between the gas barrier layer 343 and the barrier layer Μ# and the gas barrier layer 343 1 are exposed (this is set to When the field is resealed, the exposed surface 344A of the adhesive layer 344 and the exposed surface 343A of the gas barrier layer 343 1 are pressure-bonded, whereby the packaging container 1 can be resealed. The configuration of the second embodiment can achieve the same effects as those of the first embodiment. Further, the present invention is not limited to the above-described embodiment, and can be modified within the scope of the object of the invention. The present invention is also included in the present invention. For example, in the above embodiment, the shape of the packaging container is a flat rectangular shape, but the shape is not limited thereto, and may be a flat circular shape or another shape. For example, as shown in FIG. 6, the fitting convex portion 31 of the lid member 3 is combined with the fitting concave portion of the container body 2, so that the convex edge (four) of the lid member 3 may not cover the container body. 2, the end surface 23A of the flange portion 23. Further, as shown in Fig. 7, the flange portion 32 of the lid member 3 is fitted so as to cover the flange portion, so that the center of the lid member 3 is 127238.doc -20 - 200844012 can also be formed on the outside of the packaging container The convex portion 33. Thus, the container body 2 and one of the cover members 3 are reported as + + the right 24, 隹 ..., and the fitting portion is formed, so that the sealing portion 4 can be easily clamped, so that it can be resealed. [Examples] ~ Next, the present invention will be described in more detail by way of examples, which are not limited by the contents disclosed in the examples. - The packaging container is produced by the following method. Example] Evaluation of the strength of the re-attachment. First, adjust the adhesive material used in the adhesive layer. ο. Adjustment of the adhesive material used in the adhesive layer) (1-1. Containing styrene block and Mixing and granulating of dilute block gum matrix copolymer with tackifying resin) (Particle (AJ)) Polyphenylene polyisoprene dilute block copolymer relative to the amount of column (Japanese ΖΕΟΝ (Stock), Quintac 352〇) (mfr=7^(7) minutes (10), load 5(8), specific gravity 〇.93), mixed with 75 mass% (: 5-aromatic hydrogenated copolymer resin particles (Ishigaki Hiroshi ( )), IMARV P-125) (softening point 125C, initial, degree 1·〇3 g/cm3 (2〇t:)) Parts by weight, the added weight was known of the anti-^ gasifying agent (Ciba chemical (shares) system, IHGANOX 1〇1〇) mixed and stirred. Thereafter, the mixture was melt-mixed at a temperature of 180 C by a twin-screw extruder, subjected to water-cooled hinge extrusion treatment, and the extruded material was cut and granulated. (1-2. Mixing and granulating of styrene-based elastomer and plasticizer) (Particle (B1)) Relative to 40% by mass of polystyrene-polyisoprene block copolymer (Japanese ΖΕΟΝ(股) ), Quintac 352〇) (mfr=7 g/1〇(2〇〇.〇, negative 127238.doc 21 200844012 with 5 kg), specific gravity 0·93), adding 60% by mass of processing oil (lighting) Hyundai Production (D) Process, Dlana Process Oil PW-90) (density 0.8722 g/cm3 (15 C)), and after mixing and mixing, melt-mixing at a temperature of 180 ° C using a biaxial extruder to implement water-cooled hinges The extrusion treatment is carried out, and the extruded material is further cut and granulated. In the granulated product, in order to prevent the particles from agglomerating during the storage of the package, an additional 5 parts by weight of talc is added to 100 parts by weight of the granulated product. (1-3) Mixing of particle Α1, particle Bi and particle ci) Adding and mixing styrene-based gum block copolymer particles to the above-mentioned particles (Α1) and particles (Β1) ), Quintac SL-125) (MFR = 17 g / l ( (2 〇 (rc, load 5 kg), specific gravity 〇 93) (C1) to obtain adhesive materials. Styrene elastomer, tackifying resin The blending ratio of the plasticizer is 50.8 mass%: 3 〇〇 mass. / () : 19 2 mass 0 / 〇. Secondly, the cover sheet is obtained by using the adhesive material and other resins. Using a multi-layer film casting apparatus, the following three kinds of resins were extruded at 22 ° C to prepare a three-layered multilayer sheet, wherein the above-mentioned multilayer film casting apparatus was composed of a full-tooth screw having L/D = 26 It is composed of a 3mm multi-axis extrusion machine, a multi-layer feeding block, and a T-die (effective width is 4〇〇mm). • Low-density polyethylene (LDPE) (made by prime P〇lymer) , the product name "MIRASON C-24914") (MFR = 9.5 § / 1 〇 (19 〇. (:, load 2.16 kg), specific gravity 0.909 g / Cm3) • 黏 · obtained adhesive material 127238 .doc -22- 200844012 • Homogeneous Polypropylene (HPP) (manufactured by Prime Polymer, trade name “PRIME POLYPRO E-304GP”) (MFR=2.8 g/10 min (230〇C, load 2.16 1^), Specific gravity 0.90 § / (: 1113) The thickness of each layer is set to LDPE layer 5 μηη/adhesive material layer 10 μηι/ΗΡΡ layer 1 85 μπι (total thickness 200 μπι). Next, a container body sheet is produced. (3. Container body Using a multi-layer film casting apparatus, the following two kinds of resins were extruded at 220 ° C to produce a two-layered multilayer sheet, wherein the above-mentioned multilayer film casting apparatus was composed of a full-tooth screw having L/D = 26 Table 30 Single-axis extruder, multi-layer feed block, and T-die (effective width 400 mm). • Low-density polyethylene (LDPE) (made by Japan Polyethylene Co., Ltd., trade name "Novatec LD LF125E" ” (MFR=0.4 g/ΙΟ (190°C, load 2.16 kg), specific gravity 0.922 g/cm3). 80% by mass of homopolypropylene (HPP) (manufactured by Prime Polymer, trade name “PRIME POLYPRO” E-105GM") (MFR=0.50 g/10 min (23 0° (:, load 2.16 1^), specific gravity 0.9〇8/(:1113), low density with 20% by mass Polyethylene (LDPE) (manufactured by Sakamoto Polyethylene Co., Ltd., trade name "Novatec LD LF125E") (MFR = 0.4 g/10 min (190 ° C, load 2.16 kg), specific gravity 0.922 g/cm3) The thickness of each layer of the mixture was set to a mixture layer of 100 μm / ΗΡΡ and LDPE of the LDPE layer of 700 μm (total thickness of 800 μm). (4. Thermoforming of the container) Indirect heating and vacuum forming of the sheet for the cover material, thereby forming 127238.doc -23 - 200844012 Indirectly heating the plug of the vacuum-pressure forming material for the cover material having the concave portion at the center portion The capacity of the mating enemy part (5. Heat sealing of the cover material and the container body). Further, the sheet for the container body is formed to be formed to be used with the cover body. ('

In the state in which the lid member is fitted to the container body, the unsealed heat-sealing tooth coated with Teflon (registered trademark) having a width of 6 is pressed from the upper surface of the lid member to the flange portion, and the material is The container body is heat sealed to seal the packaging container. The heat sealing condition is temperature 185. (:, pressure: 15 〇 kg W/piece, time: 3 seconds. Further, the packaging container obtained in the present embodiment has the same shape as that of the first embodiment. [Comparative Example 1] A cover material having a smooth surface as a whole is formed. A packaging container that does not fit the container body is produced. Further, a packaging container is produced in the same manner as in the above-described first embodiment. [Evaluation] (Evaluation method of reproducibility) Five methods using the method of Example 1 were prepared. The prepared packaging container and five packaging containers produced by the method of Comparative Example 1 were used to evaluate the refillability of the container. The evaluation method was as follows. The packaging container was opened, and the lid member was completely peeled off from the container body. After injecting 50 additional water into each container body, the lid member is fitted to the container body, and the sealing portion of the lid member and the container body is pressed by pressing the flange circumference with a finger to seal. Then, the packaging container is inverted and Observed. (Evaluation method of the strength of the receiver) 127238.doc -24- 200844012 In the holding part of the cover material, Anjun Maru only force meter ((IM) MX-500N), and measured in the vertical direction~

The tension is also stretched. (according to JIS Z 0238) [Table 1]

Water, mm, water leakage strength (N/1 5 mm) Example 1-1 No 3 5 Example 1-2 No 3 5 Example 1-3 No 4.0 Example 1-4 No 4.0 Examples 1-5 None 3.7 Comparative Example 1 -1 0.5 (water leakage) Comparative Example 1-2 0.7 (water leakage) Comparative Example 1 - 3 None 4.0 Comparative Example 1-4 1.0 (water leakage) Comparative Example 1-5 No 3.5 The packaging container obtained by the method of Example 1 has no leakage and no higher strength. The higher value is 3 5 N/15 mm~4 〇N/15 to maintain the fixed quality. For the packaging container obtained by the method of Comparative Example 1, water leakage occurred in three of the five, and the strength was also uneven in the range of 0.5 N/15 mm to 4.0 N/15 mm, and the quality was not fixed. That is, it can be confirmed that the packaging container in which the lid member is fitted to the container body can maintain the high adhesion and the subsequent strength of 127238.doc -25·200844012. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a sealed state of a packaging container according to a first embodiment of the present invention. Figure 2 is a cross-sectional view of the above figure iin - n. Fig. 3 is an enlarged view of an essential part of the unsealing state of Fig. 1; Fig. 4 is a cross-sectional view showing the sealed state of the packaging container according to the second embodiment of the present invention. Fig. 5 is an enlarged view of an essential part of the unsealed state of Fig. 4; Fig. 6 is a cross-sectional view showing a modification of the packaging container of the present invention. Fig. 7 is a cross-sectional view showing a modification of the packaging container of the present invention. [Description of main component symbols] Bu 1» 2, 2, 3 > 3, 21 21A 21B 22 23 23A 24 25, 34 31 Packaging container Container body cover recess bottom bottom outer wall opening flange portion end face sealing portion multilayer sheet fitting Projection 127238.doc -26- 200844012 32 Wrap portion 33 Projection portion 35 Grip portion 211 Fitting recess portion 251, 341 Heat seal layer 252, 344 Adhesive layer 252A, 253A, 343A, 344A Exposure surface 253, 343 Substrate layer 255 342, 2533 Next layer 321 Flat portion 322 Peripheral portion 323 End edge portion 2531, 3431 Gas barrier layer 2532, 3432 Thermoplastic resin layer P Content 127238.doc -27-

Claims (1)

200844012 X. Application for patents: 1 · A variety of packaging troughs' includes: · container body, j: a flange is formed in the door; and the body of the lid material of the lid material is unloading and unloading n fc Ai, And the above-mentioned flange portion is sealed with a poor seal p; and is characterized in that: the container body or the cover member is provided with a demon seal, and at least The container body or the cover member is sealed by a sealing surface; the adhesive layer is disposed adjacent to the heat seal layer, and the soil layer is formed to form the appearance of the container body or the cover material; At least one of the cover members includes a fitting portion for fitting the lid member to the container body; a bonding strength between the adhesive layer and the substrate layer is less than an adhesive strength between the adhesive layer and the heat seal layer And a bonding strength between the heat sealing layer and the sealed surface, and having the strength of the adhesive layer and the substrate layer. 2. The packaging container according to claim 1, wherein the adhesive layer comprises a gel copolymer containing at least a styrene block and a diene block, and a tackifying resin. 3. The packaging container of claim 1, wherein the substrate layer of the above-mentioned gluten body and the coffin comprises polyethylene (pE), t-propyl (PP), nylon (Ny), polyethylene terephthalate At least one or more of pet, polyp-butyl benzoate (pbt), and polyethylene naphthalate. 4. A packaging container according to the request item, wherein 127238.doc 200844012 5. A gas barrier layer is provided as an intermediate layer on the substrate layer of either one of the container body and the cover member on which the adhesive layer is provided. The packaging container of claim 4, wherein the gas barrier layer comprises an ethylene-vinyl alcohol copolymer (EVOH). 6. The packaging container according to any one of claims 1 to 5, wherein the fitting portion comprises a fitting projection of the fitting recess of the container body and the cover member. 127238.doc