Container constituting member and food container

Abstract

To provide a container constituting member capable of reducing an environmental load and capable of improving impact resistance.SOLUTION: A container constituting member 10 is one container constituting member of a pair of container constituting members constituting a food container by fitting to each other, and is formed by a sheet S provided by laminating an outer layer 11, an intermediate layer 12 and an inner layer 13 in this order. Each of the outer layer 11, the intermediate layer 12 and the inner layer 13 is constituted by containing amorphous PET, and the amorphous PET contained in the intermediate layer 12 includes recycled PET provided by recycling an edge material and / or a waste material generated during molding of a PET container.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a container component and a food container. [Background technology]

[0002] Conventionally, containers have been disclosed that are formed from a sheet having an intermediate layer containing crystalline PET (polyethylene terephthalate, hereinafter the same) and two surface layers made of amorphous PET laminated on one side and the other side, respectively, of the intermediate layer (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2018-154369 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional containers have room for improvement in terms of reducing the burden on the environment and improving impact resistance.

[0005] Therefore, an object of the present invention is to provide a container component that can reduce the burden on the environment and improve impact resistance, and a food container equipped with the container component. [Means for solving the problem]

[0006] The present invention relates to one of a pair of container components that are fitted together to form a food container, the container component comprising: The outer layer, the intermediate layer, and the inner layer are laminated in this order to form a sheet. the outer layer, the intermediate layer, and the inner layer are all configured to contain amorphous PET; The amorphous PET contained in the intermediate layer provides a container component that contains recycled PET made from scraps and / or waste materials generated during the molding of PET containers. The PET container may be a PET bottle, and the scraps and / or waste materials may be generated during molding of a preform for the PET bottle. The scraps and / or waste materials may be generated during molding of the mouth portion of the preform. The amorphous PET contained in the intermediate layer may further contain virgin PET. The amorphous PET contained in the outer layer and the inner layer may be composed of virgin PET derived from biomass. The proportion of the recycled PET in the amorphous PET contained in the intermediate layer may be 5 to 95% by mass. The IV value of the amorphous PET contained in the intermediate layer may be smaller than the IV values ​​of the amorphous PET contained in the outer layer and the inner layer. The IV value of the amorphous PET contained in the intermediate layer may be 0.70 to 0.75. The IV value of the amorphous PET contained in the outer layer and the inner layer may be 0.75 to 0.80. The thickness of the intermediate layer may be 80% to 95% of the total thickness of the sheet. The present invention relates to the container component and The other of the pair of container constituent members; A food container comprising: In the food container, the other container component may also be formed from a sheet. [Brief description of the drawings]

[0007] [Figure 1] 1A to 1C are diagrams showing a configuration of a container component according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a diagram showing the configuration of an extrusion molding machine and a take-up device. [Diagram 3] 6A to 6C are diagrams showing the configuration of a container component according to a second embodiment of the present invention. [Figure 4]FIG. 11 is a diagram showing the configuration of a food container according to a third embodiment of the present invention. [Diagram 5] FIG. 11 is a diagram showing a configuration of a container-constituting member according to Modification 1 of the present invention. [Figure 6] 13 is a diagram showing a configuration of a container-constituting member according to Modification 2 of the present invention. FIG. [Figure 7] FIG. 11 is a diagram showing the configuration of a food container according to a third modified example of the present invention. [Figure 8] FIG. 11 is a diagram showing the configuration of a food container according to a fourth modified example of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configuration will be denoted by the same reference numerals to avoid repeated description. The embodiment described below shows a representative embodiment of the present invention, and the scope of the present invention will not be interpreted narrowly by this. Even if it is described in this specification that each of the container constituent members and food containers according to the present invention has multiple effects, each of the container constituent members and food containers according to the present invention only needs to have at least one effect. The effects described in this specification are merely examples and are not limited, and other effects may also be present.

[0009] The explanation will be given in the following order: 1. Introduction 2. Container component according to the first embodiment of the present invention 3. Container component according to the second embodiment of the present invention 4. Food container according to the third embodiment of the present invention 5. Modifications of the Invention

[0010] 1. Introduction 2. Description of the Related Art Conventionally, containers (PET containers) formed from a sheet having a multilayer structure (eg, a three-layer structure) in which a plurality of layers comprising PET are laminated are known. Among such containers, food containers in particular have a high degree of hygiene requirement for the inner layer that comes into contact with the food contents and the outer layer that comes into contact with the human body, so it is desirable to use virgin PET, especially virgin PET derived from biomass.

[0011] On the other hand, in this food container, the middle layer, which does not come into contact with the food contents or the human body, does not require as high a level of hygiene as the inner and outer layers, so recycled PET (regenerated PET) can be used. The use of recycled PET leads to lower costs and reduced environmental impact. In particular, the thicker the middle layer made of recycled PET, the higher the proportion of recycled PET in the entire container, leading to further cost reduction and reduced environmental impact.

[0012] Recycled PET includes PET recovered from used PET containers (hereafter referred to as "recycled PET") and scraps and / or waste materials generated during the molding of PET containers (hereafter referred to as "PET scraps and waste"). Recycled PET is usually crushed, washed, dehydrated, and then re-pelletized as necessary for recycling. Recycled PET is re-pelletized and recycled because it requires a relatively high level of hygiene. When recycled PET is re-pelletized, its IV value (intrinsic viscosity) decreases due to its thermal history (thermal deterioration and hydrolysis), and its impact resistance decreases. On the other hand, PET scraps and waste are generated during the molding of PET containers and therefore require less hygiene than recycled PET, so it is possible to recycle them without re-pelletization.

[0013] In other words, when recycling recovered PET, CO 2 In addition, the strength (impact resistance) decreases due to heat history (thermal deterioration and hydrolysis). In contrast, when PET scraps and waste materials are reused, they are not repelletized, so the CO 2 does not occur, and the decrease in strength (impact resistance) is suppressed. Therefore, when using recycled PET for the intermediate layer, using PET scraps and waste materials rather than using recovered PET can reduce the burden on the environment and improve impact resistance.

[0014] Here, recycled PET is usually inferior in strength (impact resistance) to virgin PET due to the influence of heat history during the recycling process. In this case, the impact resistance of the food container can be improved by using amorphous PET (A-PET), which has relatively high impact resistance, in the intermediate layer rather than using crystalline PET (C-PET), which has relatively low impact resistance. In particular, the thicker the intermediate layer is compared to the outer and inner layers, the more effective it is in improving impact resistance to use amorphous PET in the intermediate layer.

[0015] The inventors have discovered that by using amorphous PET, including recycled PET made from PET scraps and waste, as the middle layer, it is possible to create a food container that reduces the burden on the environment and improves impact resistance.

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a container component and a food container according to the present invention will be described in detail.

[0017] 2. Container component according to the first embodiment of the present invention [Configuration of container constituent members according to the first embodiment] FIG. 1 is a perspective view that diagrammatically shows a container component 10 according to a first embodiment of the present invention. As shown in Fig. 1, container component 10 is one of a pair of container component members 10, 20 (see Fig. 3) which fit together to form food container 1 (see Fig. 4). Container component member 10 (one of the container component members) is, for example, the container body of food container 1, and the other container component member 20 is, for example, the lid of food container 1. Food container 1 is, for example, a beverage container, a frozen dessert container, etc. Note that of the pair of container component members 10, 20, container component member 20 may be referred to as one of the container component members, and container component member 10 may be referred to as the other container component member.

[0018] As an example, the container component 10 (e.g., the container body) is a bottomed tubular member having an open end that fits with the open end of the container component 20 (e.g., a lid). The container component 20 may have a different diameter depending on the axial position, or may have the same diameter at all axial positions. As an example, both the container components 10 and 20 are transparent.

[0019] As shown in FIG. 1, the container component 10 is formed from a sheet S in which an outer layer 11, an intermediate layer 12, and an inner layer 13 are laminated in this order.

[0020] The sheet S is formed by, for example, extrusion molding. More specifically, the sheet S is formed by co-extrusion using an extruder into a state in which an outer layer 11, an intermediate layer 12, and an inner layer 13 are laminated in this order.

[0021] The container constituent members 10 are formed, for example, by sheet molding (for example, vacuum molding, compressed air molding, press molding, etc.) of the sheet S. By this sheet molding, a plurality of container constituent members 10 are simultaneously molded in a continuous, integrated manner on the sheet S.

[0022] (outer layer) The outer layer 11 is configured to include amorphous PET (A-PET). The amorphous PET included in the outer layer 11 is configured, for example, of virgin PET. The virgin PET is preferably virgin PET derived from biomass. The IV value (intrinsic viscosity) of the virgin PET (for example, virgin PET derived from biomass) is, for example, 0.75 to 0.80. The thickness of the outer layer 11 is, for example, 2.5 to 10% of the total thickness of the sheet S.

[0023] (Inner layer) The inner layer 13 is configured to include amorphous PET (A-PET). The amorphous PET included in the inner layer 13 is configured, for example, of virgin PET. The virgin PET is preferably virgin PET derived from biomass. The IV value (intrinsic viscosity) of the virgin PET (for example, virgin PET derived from biomass) is, for example, 0.75 to 0.80. The thickness of the inner layer 13 is, for example, 2.5 to 10% of the total thickness of the sheet S. Here, the thickness of the inner layer 13 is the same as the thickness of the outer layer 11, but may be different. Here, the IV value (intrinsic viscosity) of the inner layer 13 is the same as the IV value of the outer layer 11, but may be different.

[0024] (Middle class) The intermediate layer 12 is composed of amorphous PET (A-PET). The intermediate layer 12 may be composed of only amorphous PET. The thickness of the intermediate layer 12 is, for example, preferably 80 to 95% of the total thickness of the sheet S, more preferably 85 to 93%, and even more preferably 89 to 91%.

[0025] The amorphous PET contained in the intermediate layer 12 is, for example, configured to contain two types of first recycled PET.

[0026] The various first recycled PETs are made by recycling at least once scraps and / or waste materials (hereinafter also referred to as "PET scraps / waste materials") generated during the molding of PET containers. The PET containers in question are, for example, PET bottles.

[0027] The scrap is, for example, scrap generated during molding of a PET bottle, specifically, during molding of a PET bottle preform (for example, during molding of the mouth of the preform and / or the portion other than the mouth). When the PET bottle preform is molded by, for example, injection molding, the scrap is scrap generated, for example, from the runner, spool, gate, etc. of the mold when resin is injected into the mold. When the PET bottle preform is molded by, for example, compression molding, the scrap is, for example, excess resin overflowing from the parting surface when a resin material is poured into a female mold and the male mold is closed, which becomes a burr, etc.

[0028] Examples of such waste materials include defectively molded PET bottle preforms (eg, defectively molded preforms having molding defects at the mouth), defectively molded PET containers (eg, PET bottles) (eg, products that fail inspection), and the like.

[0029] Of the two types of primary recycled PET, the first type is primary recycled PET, which has been recycled only once. The PET scraps and waste materials that are the basis for this primary recycled PET can be procured by purchasing them from other companies that mold PET bottle preforms (for example, PET bottle manufacturers and their subcontractors (for example, companies that mold preforms), hereafter referred to as "PET bottle manufacturers, etc."). In particular, PET bottle manufacturers, etc., which generate a large amount of PET scraps and waste materials during the molding of PET bottle preforms, need to secure the amount to be used as return material and dispose of the remaining surplus PET scraps and waste materials, so they can purchase them relatively cheaply.

[0030] The second of the two types of first recycled PET is a first recycled PET that has been recycled multiple times. The PET scraps and waste materials that are the basis of the first recycled PET are recovered from returned materials, which are scraps and / or waste materials generated during the extrusion molding of the sheet S and / or the sheet molding of the container constituent member 10.

[0031] The IV value (intrinsic viscosity) of each first recycled PET is, for example, 0.65 to 0.75. The IV value of the first recycled PET decreases as the number of times of recycling increases. The IV value of T (purchased from another company) is preferably, for example, 0.68 to 0.73, and more preferably, for example, 0.69 to 0.72.

[0032] As an example, the amorphous PET contained in the intermediate layer 12 further contains virgin PET. The IV value (intrinsic viscosity) of the virgin PET is, for example, 0.75 to 0.80.

[0033] The amorphous PET contained in the intermediate layer 12 includes, for example, a second recycled PET. The second recycled PET is a recycled PET obtained by recycling virgin PET recovered from returned materials, which are scraps and / or waste materials generated during the extrusion molding of the sheet S and / or the sheet molding of the container-constituting member 10.

[0034] In summary, the amorphous PET contained in the intermediate layer 12 preferably includes a first recycled PET that has been recycled once, a first recycled PET that has been recycled multiple times, virgin PET, and a second recycled PET.

[0035] The IV value of the amorphous PET contained in the intermediate layer 12 is, for example, slightly smaller than the IV value of the amorphous PET contained in the outer layer 11 and the inner layer 13. Specifically, the IV value (intrinsic viscosity) of the amorphous PET contained in the intermediate layer 12 is preferably, for example, 0.70 to 0.75. In order to achieve this IV value, the distribution of each material in the mid layer 12 is as follows: The proportion of virgin PET in the amorphous PET (100% by mass) contained in the intermediate layer 12 is, for example, preferably 5 to 95% by mass, more preferably 10 to 70% by mass, even more preferably 15 to 30% by mass, and even more preferably 20 to 25% by mass. The proportion of total recycled PET (the first recycled PET that has been recycled once, the second recycled PET that has been recycled multiple times, and all of the second recycled PETs combined) in the amorphous PET (100% by mass) contained in the intermediate layer 12 is, for example, preferably 5 to 95% by mass, more preferably 30 to 90% by mass, even more preferably 70 to 85% by mass, and even more preferably 75 to 80% by mass.

[0036] The proportion of the first recycled PET, which has been recycled once, in all recycled PET (100% by mass) is, for example, preferably 25 to 31% by mass, more preferably 26 to 30% by mass, and even more preferably 27 to 29% by mass. The proportion of the first recycled PET, which has been recycled multiple times, in the total recycled PET (100% by mass) is, for example, preferably 10 to 15% by mass, and more preferably 11 to 14% by mass. The proportion of the second recycled PET in the total recycled PET (100% by mass) is, for example, preferably 35 to 40% by mass, and more preferably 36 to 39% by mass.

[0037] [Method of manufacturing container constituent member according to the first embodiment] A method for manufacturing the container component 10 of this embodiment will be described below. First, the material of the sheet S is fed into an extruder 100 shown in a cross-sectional view in FIG. 2. This extruder 100 is for carrying out a co-extrusion multi-layer T-die method, and includes, as an example, three cylinders 110 and a T-die 120. Specifically, the materials of the outer layer 11, the intermediate layer 12, and the inner layer 13 are fed from the feed ports 130 of the three cylinders 100, which are different from each other. At this time, virgin PET (for example, virgin PET derived from biomass) is fed as the material of the outer layer 11 and the inner layer 13. As the material of the intermediate layer 12, purchased PET scraps and waste materials (material of the first recycled PET that has been recycled once), PET scraps and waste materials recovered from returned materials (material of the first recycled PET and the second recycled PET that have been recycled multiple times), and virgin PET are fed in a predetermined blend (for example, see the following examples). The PET scraps and waste materials are crushed into coarse granules having a size of, for example, 2 to 8 mm as required, washed, dehydrated, and then fed into the extruder 100 . The materials fed into each cylinder 110 are kneaded while being fed in a heated state by the rotating screw 140, and are joined near the discharge port 120a of the T-die 120 and extruded together from the discharge port 120a. In this manner, a sheet S having a three-layer structure is extruded from the extrusion molding machine.

[0038] Next, the sheet S extruded from the extrusion molding machine 100 is cooled while being conveyed in a straight shape by a cooling device 200, and then supplied to a sheet molding machine via a delivery device 300.

[0039] The sheet molding machine performs sheet molding on the supplied sheet S, thereby molding a plurality (e.g., 64 pieces) of container constituent members 10 in a single sheet S in a continuous grid-like arrangement (e.g., 8×8). After that, the plurality of container constituent members 10 are cut out from the sheet S to obtain the individual container constituent members 10. (1) Sheet molding process

[0040] (Example) The above manufacturing method was carried out so as to satisfy the following conditions (1) to (4) to manufacture a container body as a container constituent member. (1) The thickness of each of the outer layer and the inner layer: 5% of the total thickness of the sheet, and the thickness of the middle layer: 90% of the total thickness of the sheet (2) IV value of virgin PET (e.g., virgin PET derived from biomass) contained in the outer and inner layers: 0.80 (3) Proportion of virgin PET in the middle layer: 22% by mass (4) The proportion of all recycled PET in the middle layer: 78% by mass (the proportion of first recycled PET recycled once: 28% by mass, the proportion of first recycled PET recycled multiple times: 12.5% ​​by mass, the proportion of second recycled PET: 37.5% by mass) By carrying out the above manufacturing method so as to satisfy the above conditions (1) to (4), the IV value (intrinsic viscosity) of the amorphous PET contained in the intermediate layer was, for example, 0.74, and a container body was obtained in which the outer layer, intermediate layer and inner layer had sufficient impact resistance for practical use.

[0041] [Effects of the container constituent member according to the first embodiment] The container component 10 in the first embodiment is one of a pair of container components 10, 20 which form a food container 1 by fitting together, and is formed from a sheet S in which an outer layer 11, an intermediate layer 12 and an inner layer 13 are laminated in this order, and the outer layer 11, the intermediate layer 12 and the inner layer 13 are all composed of amorphous PET, and the amorphous PET contained in the intermediate layer 12 is a container component which contains recycled PET made from scraps and / or waste materials generated during the molding of PET containers. In this case, since the outer layer 11, the intermediate layer 12, and the inner layer 13 are composed of amorphous PET, the impact resistance can be improved compared to a case where at least one layer is composed of crystalline PET. In addition, since the amorphous PET contained in the intermediate layer 12 contains recycled PET, the burden on the environment is reduced. As a result, the container component 10 according to the first embodiment can provide a container component that can reduce the burden on the environment and improve impact resistance.

[0042] The PET container is preferably a PET bottle, and the scraps and / or waste materials are those generated during the molding of PET bottle preforms. In this case, since molding of PET bottle preforms is usually performed in a hygienic environment, the scraps and waste materials generated in that environment are also hygienic. This allows the hygienic scraps and waste materials to be used as materials for recycled PET, and they can be reused without being repelletized. Therefore, the thermal history is reduced by the amount that is not repelletized, and the CO 2 It is possible to reduce the amount of discharged materials and suppress the deterioration of impact resistance.

[0043] In the case where the scraps and / or waste materials are generated during the molding of the mouth portion of the preform, the scraps and waste materials can be hygienically reused in a stable manner, thereby enabling a stable and continuous reduction in the burden on the environment.

[0044] When the amorphous PET contained in the intermediate layer 12 further contains virgin PET, the IV value of the intermediate layer 12 can be improved, and therefore the impact resistance can be further improved.

[0045] When the amorphous PET contained in the outer layer 11 and the inner layer 13 is virgin PET (for example, virgin PET derived from biomass), the food container 1 is excellent in hygiene, gloss, and the like.

[0046] When the rate of recycled PET in the amorphous PET contained in the intermediate layer 12 is 5 to 95% by mass, it is possible to suppress a decrease in impact resistance while ensuring a reduction in the burden on the environment.

[0047] The IV value of the amorphous PET contained in the intermediate layer 12 is preferably 0.70 to 0.75, which can ensure a level of impact resistance sufficient for practical use.

[0048] The IV value of the amorphous PET contained in the outer layer 11 and the inner layer 13 is preferably 0.75 to 0.80, thereby enabling further improvement in impact resistance.

[0049] The thickness of the intermediate layer 12 is preferably 80% to 95% of the total thickness of the sheet S. This ensures a sufficient reduction in the burden on the environment. Note that, since the higher the ratio of the thickness of the intermediate layer 12 to the total thickness of the sheet S, the higher the impact resistance required of the intermediate layer 12, it is effective to form the intermediate layer 12 from amorphous PET.

[0050] 3. Container component according to the second embodiment of the present invention FIG. 3 is a perspective view that diagrammatically shows a container component 20 according to a second embodiment of the present invention. 3, container component 20 according to the second embodiment is the other container component (e.g., a lid) that constitutes food container 1 by fitting with container component 10 according to the first embodiment. Container component 20 has a cross-shaped notch N formed in the center for inserting a straw. The container constituent member 20 is formed from a sheet (a sheet S in which an outer layer 11, an intermediate layer 12, and an inner layer 13 are laminated in this order) that is substantially the same as the container constituent member 10. The configuration of each layer of the sheet S has been described above, so an explanation thereof will be omitted.

[0051] The container component 20 can be manufactured by the same manufacturing method as the container component 10. The container component 20 also achieves the same effects as the container component 10.

[0052] (Example) The above manufacturing method was carried out so as to satisfy the following conditions (1) to (4) to manufacture a lid as a container component. (1) The thickness of each of the outer layer and the inner layer: 5% of the total thickness of the sheet, and the thickness of the middle layer: 90% of the total thickness of the sheet (2) IV value of virgin PET (e.g., virgin PET derived from biomass) contained in the outer and inner layers: 0.80 (3) Proportion of virgin PET in the middle layer: 10% by mass (4) The proportion of all recycled PET in the middle layer: 90% by mass (the proportion of first recycled PET recycled once: 40% by mass, the proportion of first recycled PET recycled multiple times: 12.5% ​​by mass, the proportion of second recycled PET: 37.5% by mass) By carrying out the above manufacturing method so as to satisfy the above conditions (1) to (4), the IV value (intrinsic viscosity) of the amorphous PET contained in the intermediate layer was, for example, 0.71, and a lid was obtained in which the outer layer, intermediate layer and inner layer had sufficient impact resistance for practical use.

[0053] 4. Food container according to the third embodiment of the present invention The food container 1 comprises one container constituent member 10 (see FIG. 1) and, as shown in FIG. 4, the other container constituent member 20 of the pair of container constituent members 10, 20 (see FIG. 3). As described above, the pair of container components 10, 20 are a container body and a lid that fit together. This reduces the burden on the environment and provides a food container 1 that is highly impact resistant.

[0054] 5. Modifications of the Invention The configurations of the container constituent member 10, the container constituent member 20, and the food container 1 described above can be modified as appropriate.

[0055] For example, one of the container constituent members may be a lid having an opening / closing part T for opening and closing a drinking spout, such as container constituent member 20A according to Modification 1 shown in FIG.

[0056] For example, one of the container constituent members may be a lid for an ice cream container, such as a container constituent member 20B according to a second modified example shown in FIG.

[0057] For example, the food container may be a food container (e.g., a beverage container) in which a container (see FIG. 1) which is the container component 10 of the first embodiment and a lid (see FIG. 5) which is the container component 20A of variant example 1 are fitted together, such as a food container 1A of variant example 3 shown in FIG. 7.

[0058] For example, the food container may be a food container (e.g., an ice cream container) in which a container body (see FIG. 1), which is the container component 10 of the first embodiment, and a lid (see FIG. 6), which is the container component 20B of variant example 2, are fitted together, such as a food container 1B of variant example 4 shown in FIG. 8.

[0059] For example, in each container component, the first recycled PET contained in the intermediate layer may be composed only of PET that has been recycled only once (for example, purchased PET scraps or waste materials).

[0060] For example, in each container component, the first recycled PET contained in the intermediate layer may be composed only of first recycled PET that has been recycled a number of times (for example, first recycled PET recovered from returned materials).

[0061] For example, in each container component, the intermediate layer does not need to contain virgin PET.

[0062] For example, in each container component, the intermediate layer does not necessarily need to contain the second recycled PET (recycled PET made from recycled virgin PET).

[0063] For example, in each container component, the scraps and / or waste materials contained in the amorphous PET contained in the intermediate layer may be scraps generated during container molding other than preform molding (eg, sheet molding). For example, one of a pair of container constituent members (container body or lid) may be formed from sheet S, and the other container constituent member (lid or container body) may be formed from a sheet other than sheet S. [Explanation of symbols]

[0064] 1, 1A, 1B: food container, 10: container component (one of the container components), 11: outer layer, 12: middle layer, 13: inner layer, 20, 20A, 20B: container component (the other container component), S: sheet.

Claims

1. One of a pair of container components that are fitted together to form a food container, The outer layer, the intermediate layer, and the inner layer are laminated in this order to form a sheet. The outer layer, the intermediate layer, and the inner layer are all configured to contain amorphous PET, The amorphous PET contained in the intermediate layer is a container component that includes recycled PET that is produced by recycling scraps and / or waste materials generated during the molding of PET containers without repelletizing them.

2. The PET container is a PET bottle, 2. The container component according to claim 1, wherein the scraps and / or waste materials are generated during molding of the PET bottle preform.

3. The container component according to claim 2 , wherein the scrap material and / or the waste material is generated during molding of the mouth portion of the preform.

4. 4. The container-constituting member according to claim 1, wherein the amorphous PET contained in the intermediate layer further contains virgin PET.

5. The container constituent member according to any one of claims 1 to 4, wherein the amorphous PET contained in the outer layer and the inner layer is made of virgin PET derived from biomass.

6. 6. The container-constituting member according to claim 1, wherein the recycled PET accounts for 5 to 95% by mass of the amorphous PET contained in the intermediate layer.

7. 7. The container-constituting member according to claim 1, wherein the amorphous PET contained in the intermediate layer has an IV value of 0.70 to 0.

75.

8. 8. The container-constituting member according to claim 1, wherein the IV value of the amorphous PET contained in the outer layer and the inner layer is 0.75 to 0.

80.

9. 9. The container-forming member according to claim 1, wherein the thickness of the intermediate layer is 80% to 95% of the total thickness of the sheet.

10. The recycled PET is Recycled PET that has been recycled once, Recycled PET that has been recycled multiple times, The container component according to any one of claims 1 to 9, comprising:

11. A container component according to any one of claims 1 to 10, The other of the pair of container constituent members; A food container comprising:

12. The food container according to claim 11, wherein the other container component is also formed from the sheet.

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