Laminated peeling container

Abstract

To propose a lamination peeling container that can improve transparency while maintaining squeezability and gas barrier property of the conventional trunk part.SOLUTION: A lamination peeling container 100 according to the present disclosure is the lamination peeling container 100 including an outer layer body 21 and an inner layer body 22 laminated on an inner surface of the outer layer body 21 in a peelable manner and free in volume-reducing deformation, and has a bottle shape having a cylindrical mouth part 10, a trunk part 20 formed below the mouth part 10 and elastically deformable by pressing, and a bottom part 40 that closes a lower end part of the trunk part 20. An outside air introduction hole 10c for introducing the outside air into a space between the outer layer body 21 and the inner layer body 22 is formed in the outer layer body 21. The outer layer body 21 has a first ionomer resin layer 21a forming the outermost layer of a base material, and the inner layer body 22 has a second ionomer resin layer 22a forming the innermost layer of the base material.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a delaminable container comprising an outer layer having a mouth, a body, and a bottom, and an inner layer disposed inside the outer layer in a peelable laminated manner. [Background technology]

[0002] Conventionally, as a container for storing contents such as food or cosmetics, a peelable laminated container has been used which comprises an outer layer having a cylindrical mouth, a cylindrical body continuing below the mouth, and a bottom closing the lower end of the body, and an inner layer which is provided inside the outer layer and stores the contents, and which is capable of peeling the inner layer inward from the outer layer (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-121758 Summary of the Invention [Problem to be solved by the invention]

[0004] In the delaminating container described in Patent Document 1, the inner layer includes a barrier layer of ethylene vinyl alcohol copolymer resin (EVOH) to improve the preservation of the contents, and the outer layer is formed using a monopolymer such as polyethylene (PE) or polypropylene (PP) in consideration of peelability from the barrier layer and squeezability of the body. However, when a monopolymer such as PE or PP is used for the outer layer, it is difficult to ensure sufficient transparency of the container.

[0005] To ensure the transparency of the container, there is a method of using random polypropylene (PP), polyethylene terephthalate (PET), or polycarbonate (PC) for the outer layer, but these are not flexible and make it difficult to dispense the contents by pressing the body, so there is still room for improvement in these respects.

[0006] The present disclosure aims to solve these problems, and its purpose is to propose a delaminating container that can improve transparency while maintaining the squeezability and gas barrier properties of the conventional body. [Means for solving the problem]

[0007] The delaminating container of the present disclosure comprises: an outer layer body; and a shrinkable and deformable inner layer body peelably laminated on the inner surface of the outer layer body. A delaminating container comprising: The bottle has a cylindrical mouth, a body formed below the mouth and elastically deformable by pressure, and a bottom closing the lower end of the body, The outer layer body has an air inlet hole formed therein for introducing outside air into a space between the outer layer body and the inner layer body, the outer layer body has a first ionomer resin layer that forms the outermost layer of the substrate, The inner layer body is characterized by having a second ionomer resin layer that forms the innermost layer of the substrate.

[0008] Furthermore, in the above-described configuration of the peelable laminated container of the present disclosure, it is preferable that the outer layer body has a polyethylene-based resin layer or a polypropylene-based resin layer inside the first ionomer resin layer, and the inner layer body has a gas barrier resin layer outside the second ionomer resin layer.

[0009] Furthermore, in the above-described configuration of the delaminated container of the present disclosure, it is preferable that the first ionomer resin layer is formed of an ethylene-based ionomer resin, and the polyethylene-based resin layer or the polypropylene-based resin layer is arranged adjacent to the inside of the first ionomer resin layer.

[0010] In addition, in the delaminated container of the present disclosure having the above configuration, it is preferable that the outer layer contains 80% by weight or more of an ionomer resin, and the inner layer contains 50% by weight or more of an ionomer resin. [Effects of the Invention]

[0011] According to the present disclosure, it is possible to propose a delaminating container that can improve transparency while maintaining the squeezability and gas barrier properties of the conventional body portion. [Brief explanation of the drawings]

[0012] [Figure 1A] 1 is a front partial cross-sectional view of a delaminating container according to an embodiment of the present disclosure. [Figure 1B] FIG. 1B is a detailed view of part A in FIG. 1A. [Figure 2] FIG. 2 is a bottom view of a delaminating container according to one embodiment of the present disclosure. [Figure 3] 1 is a diagram showing the layer structure of a body portion of a delaminated container according to an embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0013] The present disclosure will be described in more detail below with reference to the drawings.

[0014] FIG. 1A is a partial front cross-sectional view showing the configuration of a delaminating container 100 according to one embodiment of the present disclosure. The delaminating container 100 has a bottle shape and includes a substantially cylindrical body 20 that is elastically deformable when pressed and forms a storage space S for the contents, a tubular mouth 10 that is connected to the upper end of the body 20 via a shoulder 30 and forms an opening 10a on the inside for supplying and discharging the contents, and a bottom 40 that closes the lower end of the body 20. As shown in FIG. 1A, the outer peripheral surface of the mouth 10 is provided with a male thread 10b that allows a cap, a pump, or the like to be attached by threaded engagement. Note that instead of the male thread 10b, a convex or concave engaging portion may be provided, and a concave or convex engaging portion on the cap may engage with the engaging portion to hold the cap in place.

[0015] 1B, the delaminating container 100 comprises an inner layer body 22 that forms a storage space S for storing contents, and an outer layer body 21 that radially covers the inner layer body 22, and at two opposing circumferential locations on the body 20 (the left and right ends in FIG. 1A), adhesive bands 25 are provided that bond the inner layer body 22 and the outer layer body 21 and extend in the vertical direction. Except for the region where the adhesive bands 25 are provided and a pinch-off portion 45 of the bottom 40, which will be described later, the inner layer body 22 is peelably laminated on the inner surface of the outer layer body 21, and is configured to be deformable by peeling the inner layer body 22 inward to reduce volume.

[0016] Here, the phrase "peelably laminated" of the inner layer 22 to the inner surface of the outer layer 21 does not only mean that the inner layer 22 laminated to the inner surface of the outer layer 21 in an adhered, pseudo-adhered or welded state can be peeled off from the outer layer 21, but also means that the inner layer 22 laminated to the inner surface of the outer layer 21 in a simply intimate contact state can be separated from the outer layer 21.

[0017] In this specification, claims, and drawings, the side where the mouth portion 10 is located is referred to as the upper side (upper side in FIG. 1A), and the side where the bottom portion 40 is located is referred to as the lower side (lower side in FIG. 1A). The radially outward direction refers to the direction away from the central axis O of the delaminating container 100 in FIG. 1A along a straight line passing through the central axis O and perpendicular to the central axis O, and the radially inward direction refers to the direction toward the central axis O along this straight line. In addition, in describing the layer structure of the delaminating container 100, the side where the first ionomer resin layer 21a of the outer layer body 21 is located is referred to as the outer side, and the side where the second ionomer resin layer 22a of the inner layer body 22 is located is referred to as the inner side (the side of the storage space S) (see FIG. 3).

[0018] The delaminated container 100 is made of synthetic resin, and can be formed, for example, by co-extruding the synthetic resin that forms the outer layer 21 and the synthetic resin that forms the inner layer 22 in a molten state to form a cylindrical laminated parison, and then sandwiching the laminated parison between a mold and blow molding (extrusion blow molding).

[0019] The outer layer 21 of the mouth 10 has two outside air introduction holes 10c formed on opposite sides of the central axis O. The outside air introduction holes 10c penetrate the outer layer 21 horizontally toward the central axis O and are circular. The outside air introduction holes 10c do not penetrate the inner layer 22, and air can flow into the space between the outer layer 21 and the inner layer 22 through the outside air introduction holes 10c. Note that an outside air introduction rib may be formed on the shoulder 30 to efficiently introduce outside air through the outside air introduction holes 10c formed in the mouth 10. In this embodiment, the outside air introduction holes 10c are formed in the mouth 10, but the position, number, and shape of the outside air introduction holes 10c are not particularly limited as long as they can introduce air between the outer layer 21 and the inner layer 22; for example, they may be formed in the body 20 or the bottom 40 (described later).

[0020] Shoulder portion 30 is continuous with the lower end of mouth portion 10 and expands radially outward as it extends downward. As shown in Fig. 1A, shoulder portion 30 in this embodiment is inclined at a substantially constant angle relative to central axis O and has a flat shape with a straight outline, but is not limited to this and may be a dome shape that bulges outward from the container, or an inverted dome shape that is recessed inward from the container.

[0021] The upper end of the body 20 is connected to the lower end of the shoulder 30, and the lower end of the body 20 is connected to the outer periphery of the bottom 40. The body 20 is flexible enough to be squeezable, and the contents can be dispensed by squeezing the body 20 at approximately the center height (indicated by the white arrow in FIG. 1A). The method for dispensing the contents is not particularly limited. For example, the delaminating container 100 may be inverted to allow the contents to be dispensed by their own weight, or a dispensing cap with a pump mechanism may be attached to the spout 10. The body 20 is curved and constricted overall so that the center position in the height direction (direction of the central axis O) is concave toward the central axis O. That is, the diameter of the body 20 gradually decreases from the upper end connected to the shoulder 30 downward, and gradually increases from the smallest diameter portion toward the lower end connected to the bottom 40.

[0022] The bottom 40 has a shape in which a part is curved concavely toward the inside of the container, and the delaminating container 100 can stand on its own by contacting a ground surface 41 provided near the outer periphery of the bottom 40 with the ground. In the present embodiment, a pinch-off portion 45 is formed in the bottom 40 by cutting off the part using a split mold for blow molding.

[0023] 2, the pinch-off portion 45 extends linearly along the parting line PL in the bottom portion 40. The pinch-off portion 45 located in the bottom portion 40 extends radially so as to pass through the center of the bottom portion 40, and is configured to prevent the inner layer body 22 from peeling off from the outer layer body 21 at the pinch-off portion 45. Instead of the outside air introduction hole 10c provided in the mouth portion 10, or in addition to the outside air introduction hole 10c, outside air may be introduced through the gap between the outer layer bodies 21 at the pinch-off portion 45.

[0024] The layer structure of the body 20 of the laminated container 100 according to this embodiment is shown in Fig. 3. In this embodiment, the outer layer 21 includes, from the outside, a first ionomer resin layer 21a and a low-density polyethylene (LDPE) resin layer 21b.

[0025] The first ionomer resin layer 21a is a resin layer containing a polyethylene-based ionomer. The first ionomer resin layer 21a is a resin obtained by cross-linking a polymer containing methacrylic acid and polyethylene with a metal. As will be described later, ionomer resin has high transparency due to its excellent surface smoothness. Furthermore, ionomer resin has excellent elasticity and flexibility, so when used in the outer layer body 21, it can be easily elastically deformed inward by squeezing the torso 20 by the user. In this embodiment, the proportion of ionomer resin in the outer layer body 21 is configured to be 80% by weight or more.

[0026] The ionomer resin contained in the first ionomer resin layer 21a may be, for example, Himilan (registered trademark) 1706 from Mitsui Dow Polychemical Co., Ltd., but is not limited to this, and other ionomer resins that have surface smoothness and flexibility may be contained.

[0027] The LDPE resin layer 21b is a resin layer containing LDPE resin as a main material. LDPE resin has a specific gravity of approximately 0.92 and is flexible. Examples of LDPE resin that can be used include, but are not limited to, NUC8505 manufactured by ENEOSNUC ​​Corporation, and other flexible LDPE resins may also be used.

[0028] The outer layer body 21 may have a PP resin layer instead of the LDPE resin layer 21b. Furthermore, without being limited to these embodiments, for example, when the delaminated container 100 is formed by biaxially stretched blow molding, the material of the outer layer body 21 may be polyethylene terephthalate (PET) or the like.

[0029] In the past, materials containing LDPE resin or PP (monopolymer) resin, which are incompatible with the gas barrier resin used in the inner layer, have been used as the outer layer material. However, when an outer layer containing LDPE resin or PP resin is used, sufficient transparency may not be obtained due to the smoothness of the outer surface. In this embodiment, as shown in FIG. 3, a first ionomer resin layer 21a is provided on the outside of the LDPE resin layer 21b, and the transparency of the body portion 20 can be improved due to the smoothness of the outer surface of the first ionomer resin layer 21a.

[0030] That is, because the first ionomer resin layer 21a, which has excellent smoothness, is used as the resin that constitutes the outer surface of the outer layer body 21, light passing through the outer surface of the outer layer body 21, which is the boundary with the air, can be transmitted without being scattered by the outer surface, resulting in a clear, transparent body portion 20. Furthermore, in this embodiment, the LDPE resin layer 21b is disposed inside the first ionomer resin layer 21a in the outer layer body 21, and because the LDPE resin layer 21b and the gas barrier resin are not compatible with each other, the peelability of the gas barrier resin layer contained in the inner layer body 22 can also be ensured.

[0031] Furthermore, in this embodiment, the first ionomer resin layer 21a is configured to contain a polyethylene-based ionomer resin, which increases the compatibility between the first ionomer resin layer 21a and the LDPE resin layer 21b and suppresses peeling within the outer layer body 21.

[0032] In this embodiment, the outer layer body 21 contains 80% by weight or more of ionomer resin. This configuration ensures the smoothness of the outer surface of the outer layer body 21 and maintains the transparency of the resin layer.

[0033] The thicknesses of the first ionomer resin layer 21a and the low-density polyethylene (LDPE) resin layer 21b may be, for example, 400 μm and 50 μm, respectively.

[0034] The outer surface of the first ionomer resin layer 21a may be decorated, for example, by painting. This is because the transparency of the outer layer body 21 is maintained even if the outer surface of the first ionomer resin layer 21a is decorated to the extent that smoothness is maintained. In this case, the decoration such as painting is not included in the base material of the outer layer body 21, and the first ionomer resin layer 21a constitutes the outermost layer of the base material of the outer layer body 21.

[0035] The outer layer body 21 may be a resin layer consisting of only the first ionomer resin layer 21a, or may have a resin layer other than the LDPE resin layer 21b on the inside.

[0036] As shown in FIG. 3, the inner layer body 22 includes, in order from the inside, a second ionomer resin layer 22a, an adhesive layer 22c, and a nylon resin layer 22b.

[0037] The second ionomer resin layer 22a is a resin layer containing a polyethylene-based ionomer. Similar to the first ionomer resin layer 21a, the second ionomer resin layer 22a is a resin obtained by cross-linking a polymer containing methacrylic acid and polyethylene with a metal. Ionomer resin has excellent elasticity and flexibility, which can reduce the rigidity of the inner layer body 22, allowing the inner layer body 22 to easily shrink and deform as the contents are used. In this embodiment, the ratio of ionomer resin in the inner layer body 22 is configured to be 50% by weight or more.

[0038] The ionomer resin contained in the second ionomer resin layer 22a may be, but is not limited to, Himilan (registered trademark) 1706 from Mitsui Dow Polychemical Co., Ltd., and may contain other ionomer resins that have surface smoothness and flexibility.

[0039] The nylon resin layer 22b is a resin layer primarily made of nylon, and is provided on the outside of the second ionomer resin layer 22a via an adhesive layer 22c. Nylon has gas barrier properties, and providing the nylon resin layer 22b in the inner layer body 22 can prevent the contents inside the inner layer body 22 from being exposed to air. The nylon that constitutes the nylon resin layer 22b can be, for example, a resin layer primarily made of NOVAMID2430AH2 (manufactured by Mitsubishi Chemical Corporation; NOVAMID is a registered trademark). Alternatively, instead of the nylon resin layer 22b, a resin layer primarily made of another resin with gas barrier properties, such as ethylene-vinyl alcohol copolymer resin (EVOH), can be used as the gas barrier layer.

[0040] The thicknesses of the second ionomer resin layer 22a and the nylon resin layer 22b may be, for example, 100 μm and 20 μm, respectively.

[0041] The adhesive layer 22c may be a resin layer whose main material is, for example, modified polyolefin resin ("Admer" (registered trademark) (model number: NB550) manufactured by Mitsui Chemicals, Inc.).Instead of providing the adhesive layer 22c, an adhesive may be mixed into at least one of the second ionomer resin layer 22a and the nylon resin layer 22b to impart adhesiveness.

[0042] In this embodiment, adhesive bands 25 are provided in two circumferential locations that constitute the parting line PL (see FIG. 2), extending in a strip-like shape in the up-down direction. The adhesive bands 25 may also be made of the above-mentioned modified polyolefin resin or other adhesive resins. The adhesive bands 25 may also be provided in only one circumferential location, or in three or more locations. Alternatively, the adhesive bands 25 may not be provided.

[0043] Conventionally, the inner layer has sometimes been made of a resin containing only gas barrier properties, such as nylon or EVOH. However, when only a resin with gas barrier properties is used as the inner layer, sufficient transparency may not be obtained due to the smoothness of the inner surface. In this embodiment, as shown in FIG. 3, a second ionomer resin layer 22a is provided inside the nylon resin layer 22b. This improves the transparency of the body portion 20 due to the smoothness of the inner surface of the second ionomer resin layer 22a.

[0044] In other words, since the second ionomer resin layer 22a, which has excellent smoothness, is used as the resin that constitutes the inner surface of the inner layer body 22, light passing through the inner surface of the inner layer body 22, which is the boundary with the storage space S, can be transmitted without being scattered by the inner surface, thereby forming a body portion 20 that is clear and has excellent transparency.

[0045] The inner layer body 22 may be a resin layer consisting of only the second ionomer resin layer 22a, or may have an outer resin layer other than the nylon resin layer 22b.

[0046] As described above, the delaminating container 100 according to this embodiment includes an outer layer 21 and a compressible inner layer 22 peelably laminated on the inner surface of the outer layer 21. The container has a bottle shape with a cylindrical mouth 10, a body 20 formed below the mouth 10 and elastically deformable by pressure, and a bottom 40 closing the lower end of the body 20. The outer layer 21 has an air inlet 10c for introducing air into the space between the outer layer 21 and the inner layer 22. The outer layer 21 has a first ionomer resin layer 21a forming the outermost layer of the base material, and the inner layer 22 has a second ionomer resin layer 22a forming the innermost layer of the base material. This configuration allows the outer surface of the outer layer 21 and the inner surface of the inner layer 22 to be made of ionomer resin with excellent smoothness, thereby improving the transparency of the body 20. Therefore, the transparency of the body portion 20 can be improved while maintaining the squeezability and gas barrier properties of the conventional body portion 20.

[0047] In this embodiment, the outer layer body 21 has a polyethylene-based resin layer or a polypropylene-based resin layer on the inner side of the first ionomer resin layer 21a, and the inner layer body 22 has a gas-barrier resin layer on the outer side of the second ionomer resin layer 22a. This configuration allows the inner layer body 22 to have a gas-barrier resin layer, thereby preventing gas from entering the storage space S through the inner layer body 22 and causing deterioration of the contents, and improving the aroma retention of the contents. Furthermore, a polyethylene-based resin layer or a polypropylene-based resin layer that is incompatible with the gas-barrier resin layer is provided on the outer layer body 21 inside the first ionomer resin layer 21a, thereby preventing fusion between the first ionomer resin layer 21a and the gas-barrier resin layer, making it easier for the inner layer body 22 to peel inward from the outer layer body 21.

[0048] In this embodiment, the first ionomer resin layer 21a is formed of an ethylene-based ionomer resin, and the polyethylene-based resin layer or polypropylene-based resin layer is disposed adjacent to the inner side of the first ionomer resin layer 21a. By adopting such a configuration, the polyethylene-based resin layer or polypropylene-based resin layer that is compatible with the first ionomer resin layer 21a is disposed on the inner side of the first ionomer resin layer 21a, thereby strengthening the adhesion between the resin layers that constitute the outer layer body 21.

[0049] In this embodiment, the outer layer body 21 contains 80% by weight or more of ionomer resin, and the inner layer body 22 contains 50% by weight or more of ionomer resin. By adopting such a configuration, the proportion of ionomer resin in the outer layer body 21 that comes into contact with air is increased, which can suppress scattering of transmitted light on the outer surface of the outer layer body 21 and increase the transparency of the delaminating container 100. Furthermore, by increasing the proportion of ionomer resin in the second ionomer resin layer 22a that faces the storage space S to a certain extent, scattering of transmitted light on the inner surface of the inner layer body 22 can be suppressed, further increasing the transparency of the delaminating container 100.

[0050] Although the present disclosure has been described based on various drawings and examples, it should be noted that those skilled in the art can easily make various modifications and alterations based on the present disclosure. Therefore, it should be noted that these modifications and alterations are included in the scope of the present invention. For example, the functions included in each component can be rearranged so as not to cause logical inconsistencies, and multiple components can be combined into one or divided. It should be understood that these modifications and alterations are also included in the scope of the present invention.

[0051] For example, in this embodiment, the delaminating container 100 is configured to have a laminated structure of the outer layer 21 and the inner layer 22 from the mouth 10 to the bottom 40, but is not limited to this. It is sufficient that at least the body 20 that defines the storage space S for storing the contents has a laminated structure of the outer layer 21 and the inner layer 22. [Example]

[0052] (transparency) Three types of samples were prepared, each with different configurations of the outer layer 21 and inner layer 22 that make up the body 20 of the delaminating container 100 shown in Fig. 1A, and the total light transmittance and haze value of light passing through approximately the center height of the body 20 (the height position indicated by the white arrow in Fig. 1A) were measured. The three types of samples are an example in which an ionomer resin layer (Himilan) is provided on each of the outer layer 21 and the inner layer 22, comparative example 1 in which an ionomer resin layer is provided only on the outer layer 21, and comparative example 2 in which an ionomer resin layer is not provided on either the outer layer 21 or the inner layer 22. In the samples of the examples, the proportion of ionomer resin in the outer layer 21 is 80% by weight or more, and the proportion of ionomer resin in the inner layer 22 is 50% by weight or more.

[0053] The layer structures of the examples and comparative examples are shown in Table 1. [Table 1]

[0054] The total light transmittance is the ratio [%] of the amount of light after passing through the body 20 (total light transmission amount) to the amount of light before passing through the body 20 of the delaminating container 100. In other words, it indicates the ratio of the amount of light before and after passing through the resin layer of the body 20 once.

[0055] On the other hand, the haze value, also known as the cloudiness value, is the ratio [%] of the amount of diffusely transmitted light to the total amount of transmitted light mentioned above. Measurements were performed using a Haze-METER (model: NDH-5000) manufactured by Nippon Denshoku Industries Co., Ltd. The measurement results are shown in Table 2.

[0056] [Table 2]

[0057] According to Table 2, when both the outer layer 21 and the inner layer 22 are used, the use of an ionomer resin layer only in the outer layer 21 (Comparative Example 1) results in a significant increase in total light transmittance from 75.64% (Comparative Example 2) to 84.05% (Comparative Example 1), and a significant improvement in haze value from 45.89% (Comparative Example 2) to 26.26% (Comparative Example 1). This is mainly due to the fact that the total light transmittance of the outer layer 21 increased from 78.83% (Comparative Example 2) to 88.92% (Comparative Example 1), and the significant improvement in haze value from 38.22% (Comparative Example 2) to 6.08% (Comparative Example 1). Furthermore, the change in the gas barrier layer of the inner layer 22 from EVOH to nylon also resulted in an improvement in the haze value of the inner layer 22 from 27.28% (Comparative Example 2) to 16.31% (Comparative Example 1).

[0058] Furthermore, when both the outer layer 21 and the inner layer 22 are attached, the use of ionomer resin layers in both the outer layer 21 and the inner layer 22 (Example) increases the total light transmittance from 75.64% (Comparative Example 2) to 89.50% (Example), and the haze value is significantly improved from 45.89% (Comparative Example 2) to 10.66% (Example). This is thought to be due to the fact that the total light transmittance increases from 88.56% (Comparative Example 2) to 91.06% (Example) and the haze value is significantly improved from 27.28% (Comparative Example 2) to 3.10% (Example) in the inner layer 22 as well as the outer layer 21.

[0059] From the above results, it was found that the haze value was significantly improved by providing an ionomer resin layer on both the outer layer body 21 and the inner layer body 22. The configuration of the example makes it possible to improve the transparency of the body 20 of the delaminating container 100 while maintaining the conventional gas barrier properties of the delaminating container 100.

[0060] (body rigidity) Next, four types of samples were prepared with different layer configurations of the body portion 20, and the rigidity of the body portion 20 was evaluated. The four types of samples are an example in which an ionomer resin layer (Himilan) is provided on both the outer layer body 21 and the inner layer body 22, a comparative example 1 in which an ionomer resin layer is provided only on the outer layer body 21, and comparative examples 3 and 4 in which an ionomer resin layer is not provided on either the outer layer body 21 or the inner layer body 22.

[0061] Table 3 shows the layer structures of the examples and comparative examples. [Table 3]

[0062] The body rigidity was evaluated using a bending strength tester (model number: AG-2000D) manufactured by Shimadzu Corporation. Two spheres with a diameter of 20 mm were used to clamp the center height of the body 20 of the delaminating container 100 (the height position indicated by the white arrow in Figure 1A) from both sides, and the body 20 was deformed at a speed of 13 mm / min. The body rigidity was evaluated by measuring the load [N] when the body 20 was displaced a predetermined distance. The evaluation results are shown in Table 4.

[0063] [Table 4]

[0064] According to Table 4, when an ionomer resin layer is used in both the outer layer body 21 and the inner layer body 22 (Example) and when an ionomer resin layer is used only in the outer layer body 21 (Comparative Example 1), the load required to displace the body 20 by the same distance tends to be smaller in body rigidity than when an ionomer resin layer is not used in either the outer layer body 21 or the inner layer body 22 (Comparative Examples 3 and 4). In other words, the body rigidity was slightly lower in Example and Comparative Example 1 than in Comparative Examples 3 and 4. Therefore, the configuration of the Example can improve the transparency of the body 20 of the delaminating container 100 while maintaining the conventional squeezability and gas barrier properties of the delaminating container 100. [Industrial Applicability]

[0065] According to the present disclosure, it is possible to propose a delaminated container 100 that can maintain the squeezability and gas barrier properties of the conventional body 20 while improving transparency. [Explanation of symbols]

[0066] 10 Mouth 10a opening 10b Male thread 10c Outside air intake 20 Torso 21 Outer body 21a First ionomer resin layer 21b Low-density polyethylene (LDPE) resin layer 21c LDPE resin layer 22 Inner layer 22a Second ionomer resin layer 22b Nylon resin layer 22c adhesive layer 25 adhesive strip 30 Shoulder 40 bottom 41 Ground plane 45 Pinch-off section 100 delaminating container O center axis PL parting line S Storage space

Claims

1. an outer layer body; and a shrinkable and deformable inner layer body peelably laminated on the inner surface of the outer layer body. A delaminating container comprising: The bottle has a cylindrical mouth, a body formed below the mouth and elastically deformable by pressure, and a bottom closing the lower end of the body, The outer layer body has an air inlet hole formed therein for introducing outside air into a space between the outer layer body and the inner layer body, the outer layer body has a first ionomer resin layer that forms the outermost layer of the substrate, The delaminating container is characterized in that the inner layer body has a second ionomer resin layer that forms the innermost layer of the base material.

2. the outer layer body has a polyethylene-based resin layer or a polypropylene-based resin layer on the inner side of the first ionomer resin layer, The delaminating container according to claim 1 , wherein the inner layer body has a gas barrier resin layer on the outside of the second ionomer resin layer.

3. the first ionomer resin layer is formed of an ethylene-based ionomer resin, The delaminating container according to claim 2 , wherein the polyethylene-based resin layer or the polypropylene-based resin layer is disposed adjacent to the inner side of the first ionomer resin layer.

4. 4. The delaminating container according to claim 1, wherein the outer layer contains 80% by weight or more of an ionomer resin, and the inner layer contains 50% by weight or more of an ionomer resin.

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