JP2023020653A - cup-shaped container - Google Patents

Abstract

To provide a cup-shaped container that can be mass-produced at a low cost using a paper cup manufacturing facility, has excellent long-term storage stability of contents, can be sterilized by retort, and can effectively prevent the contents from sticking to an inner surface of the container.SOLUTION: A cup-shaped container is composed of a cylindrically formed body and a bottom. An outer surface of a dropping part is joined to an inner surface of a lower end part of the body. A body blank and a bottom blank are respectively formed of laminates 20, 30 including: metal foil layers 201, 301; inner heat-fusible resin layers 202, 302 laminated on surfaces of the metal foil layers 201, 301 that serve as an inner side of the cup-shaped container; outer heat-fusible resin layers 203, 303 laminated on a surface to be the outside of the cup-shaped container out of both surfaces of the metal foil layers 201, 301; and content sticking prevention layers 204, 304 formed on surfaces of the inner heat-fusible resin layers 202, 302 so as to constitute an inner surface of the cup-shaped container and containing hydrophobic fine particles.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to a cup-shaped container for filling and packaging semi-solids and highly viscous liquids such as ice cream, yoghurt and smoothies.

For example, a cup-shaped container formed by using a body blank and a bottom blank made of a laminated body mainly made of paper as a container for filling and packaging semi-solids and highly viscous liquids such as ice cream, yogurt, and smoothies. , that is, paper cups are generally known (see, for example, Patent Document 1 below). Paper cups are highly productive and can be manufactured at low cost.
There is also known a paper cup formed using a body blank and a bottom blank made of a laminate to which a barrier layer such as aluminum foil is added (see, for example, Patent Document 2 below). In the case of this paper cup, although the long-term storage stability of the contents is improved, water easily penetrates from the end face of the paper layer, and retort sterilization and the like cannot be performed.
Furthermore, as this type of container, there is also known a container made of a molded plastic such as polypropylene (PP) (see, for example, Patent Document 3 below). However, in the case of molded plastic containers, the cost of manufacturing equipment is high, and they are not suitable for long-term storage of contents.

Therefore, in order to solve the above problems, the present inventors have proposed a laminate composed of a metal foil layer and heat-fusible resin layers laminated on both sides thereof as materials for the body blank and the bottom blank. The cup-shaped container used was previously proposed (see Patent Document 4 below).
The above cup-shaped container can be manufactured at low cost using paper cup manufacturing equipment, has excellent long-term storage stability of the contents, and can be subjected to aseptic sterilization and retort sterilization.
However, in the above-mentioned cup-shaped container, if the content is highly viscous, the content may adhere to the inner surface of the container, making it difficult to eat or drink, or leading to an increase in food loss. be.

As a means for preventing the contents from adhering to the inner surface of the container, for example, a molded polypropylene container or a paper cup is immersed in a coating liquid containing hydrophobic oxide fine particles, so that the inner surface of the container is treated. It is known to impart a content adhesion prevention function (see Patent Document 5 below).

JP-A-58-30955 Japanese Patent Application Laid-Open No. 2007-210639 JP 2007-176505 A JP 2020-11774 A Japanese Patent No. 5683827

However, in the case of the content adhesion prevention means described in Patent Document 5, since a molded container or a paper cup is subjected to immersion treatment, uniform surface treatment of the inner surface of the container is difficult, and content adhesion by hydrophobic oxide fine particles is difficult. There was variation in the preventive effect.

An object of the present invention is to provide a cup-shaped container that can be mass-produced at low cost using paper cup manufacturing equipment, has excellent long-term storage stability of the contents, and can be sterilized by retort, etc. To provide a device capable of effectively preventing

This invention consists of the following aspects in order to achieve said objective.
In the present invention, the term "cup-shaped container" refers to a container formed using a body blank and a bottom blank in the same manner as a paper cup. The ratio and size of are not particularly limited.

1) A body is formed in a cylindrical shape by overlapping and joining both edges of the body blank, and a hanging part extending downward from the bottom of the bottom blank and the outer peripheral edge of the bottom is formed. The cup is composed of a bottom body having a substantially inverted U-shaped cross section formed in a manner such that the body and the bottom body are integrated by joining the outer surface of the hanging part of the bottom body to the inner surface of the lower end part of the body. shaped container,
Each of the body blank and the bottom blank has a metal foil layer, an inner heat-fusible resin layer laminated on one of both sides of the metal foil layer that is to be the inner side of the cup-shaped container, and both sides of the metal foil layer. Of these, the outer heat-fusible resin layer laminated on the outer surface of the cup-shaped container, and the hydrophobic fine particles formed on the surface of the inner heat-fusible resin layer so as to constitute the inner surface of the cup-shaped container A cup-shaped container, characterized in that it is formed from a laminate comprising a content adhesion prevention layer containing

2) The cup-shaped container according to 1) above, wherein the average particle size of the hydrophobic fine particles is 1 to 5000 nm, and the adhesion amount of the hydrophobic fine particles is 0.3 to 3 g/m ² .

3) The cup-shaped container according to 1) or 2) above, wherein the hydrophobic fine particles are composed of hydrophobic wet silica fine particles.

4) The content adhesion prevention layer contains a binder made of a thermoplastic resin,
The cup-shaped container according to 3) above, wherein the blending ratio of the binder and the hydrophobic fine particles is 10 to 90% by mass of the binder and 90 to 10% by mass of the hydrophobic fine particles in solid content ratio.

5) The cup-shaped container according to any one of 1) to 4) above, wherein an anchor coat layer is formed between the inner heat-fusible resin layer and the content-adhesion prevention layer.

6) The cup-shaped structure according to 5) above, wherein a part of the hydrophobic fine particles is embedded in the anchor coat layer and the other part is exposed on the surface of the content adhesion prevention layer. container.

7) The anchor coat layer is made of a thermoset product of an alcohol-soluble resin composition containing a wax component and a resin component in which a linear resin acid and a sesquiterpene resin acid are ester-bonded. ) or the cup-shaped container of 6).

8) the linear resin acid is aloyritic acid;
the sesquiterpene-based resin acid is at least one resin acid selected from the group consisting of sherolic acid, jalaric acid, and laxijarar acid;
The wax component is at least one wax component selected from the group consisting of tacardiacerol, laxerol, milliserial chol, ceryl alcohol, lignoceric acid, cerotic acid, stearic acid, palmitic acid and esters thereof,
The cup-shaped container according to 7) above, wherein the anchor coat layer has a thickness of 0.5 to 5 μm.

According to the cup-shaped container of 1) above, mass production can be performed at low cost using paper cup manufacturing equipment, the contents are excellent in long-term storage, and retort sterilization is possible. effect is played.
That is, according to the cup-shaped container of the above 1), the inner surface is composed of the content adhesion prevention layer of the laminate forming the body blank and the bottom blank. Even in the case of highly viscous liquid foods and beverages, the hydrophobic fine particles contained in the content adhesion prevention layer effectively suppress the adhesion of the contents over the entire inner surface of the container, making eating and drinking easier. , food loss can be reduced, and the container can be easily cleaned at the time of disposal.

According to the cup-shaped container of 2), the effect of the cup-shaped container of 1) is more effectively exhibited.

According to the cup-shaped container of 3) above, the hydrophobic fine particles used for the content adhesion prevention layer can be obtained easily and inexpensively, and an excellent content adhesion prevention effect is exhibited.

According to the cup-shaped container of 4) above, the binding force between the primary particles and the secondary particles of the hydrophobic fine particles having poor binding properties is increased by the binder made of the thermoplastic resin contained in the content adhesion prevention layer. In addition to this, the adhesiveness of the fine particles to the inner heat-fusible resin layer is also improved, so that the drop-off of the hydrophobic fine particles can be prevented from lowering the content adhesion prevention function.

According to the cup-shaped container of 5) above, since the anchor coat layer exists between the inner heat-fusible resin layer and the content adhesion prevention layer, the inner surface of the cup-shaped container may be shaken during transportation, for example. Even when highly viscous contents repeatedly come into contact with the container, the hydrophobic fine particles are less likely to fall off, and the effect of preventing adhesion of the contents is more reliably maintained.

According to the cup-shaped container of 6) above, since part of the hydrophobic fine particles is embedded in the anchor coat layer, it is possible to sufficiently prevent the hydrophobic fine particles from falling off, and at the same time, the other part of the hydrophobic fine particles can be contained. Since it is exposed on the surface of the anti-adhesion layer, that is, on the inner surface of the cup-shaped container, it is possible to ensure sufficient anti-adhesion performance.

According to the cup-shaped container of 7) above, since the anchor coat layer having the above-described specific configuration exists between the inner heat-fusible resin layer and the content adhesion prevention layer, for example, a highly viscous content Even if objects repeatedly come into contact with the inner surface of the cup-shaped container, the hydrophobic fine particles can be sufficiently prevented from falling off, and the content adhesion prevention performance can be maintained.

According to the cup-shaped container of the above 8), it is possible to further sufficiently prevent the hydrophobic fine particles from falling off, and to further enhance the effect of the content adhesion prevention layer to prevent adhesion of the contents.
According to the cup-shaped container of 8) above, the anchor coat layer having a thickness of 0.5 μm or more can sufficiently prevent the hydrophobic fine particles from falling off, and the anchor coat layer having a thickness of 5 μm or less can sufficiently prevent the hydrophobic fine particles from falling off. Therefore, sufficient heat-sealing property of the inner heat-fusible resin layer can be ensured.

1 is a perspective view of a cup-shaped container according to a first embodiment of the invention; FIG. FIG. 2 is a vertical sectional view along line II-II of FIG. 1; (a) is an enlarged cross-sectional view showing a layer structure of a first embodiment of a laminate used as a material for a body blank, and (b) is an enlarged sectional view showing a first embodiment of a laminate used as a material for a bottom blank; is an enlarged cross-sectional view showing the layer structure of. (a) is an enlarged cross-sectional view showing a layer structure of a second embodiment of a laminate used as a material for a body blank, and (b) is a second embodiment of a laminate used as a material for a bottom blank; is an enlarged cross-sectional view showing the layer structure of. It is sectional drawing which expanded each part of FIG.4(a)(b) further and was shown typically. FIG. 4 is a horizontal cross-sectional view showing an enlarged overlapping portion of the body of the cup-shaped container. (a) is a plan view of a fuselage blank, and (b) is a perspective view of a fuselage molded from the fuselage blank. (a) is a plan view of a bottom blank, and (b) is a perspective view of a bottom formed from the bottom blank. It is a vertical sectional view which shows a part of manufacturing process of the said cup-shaped container. 2 shows a cup-shaped container according to a second embodiment of the present invention, where (a) is a horizontal cross-sectional view of the cup-shaped container, and (b) is surrounded by a dashed line b in (a). It is an enlarged view of a part. It is a horizontal sectional view which shows a part of manufacturing process of the said cup-shaped container.

Embodiments of the present invention are described below with reference to FIGS. 1-11.
In the following description, "top and bottom" means the top and bottom of the cup-shaped container, the body, and the bottom (for example, the top and bottom in FIGS. 2 and 9), and "inner" means the cup-shaped container, the body, and the bottom. Refers to the side near the center of the bottom body (for example, the top of each of FIGS. 6 and 10 (b), the right side of FIG. 9), and the “outer” refers to the side far from the center of the cup-shaped container, the body, and the bottom body (for example, the 6 and 10(b), left of FIG. 9).

[First embodiment]
1 and 2 show the overall structure of a cup-shaped container (1) according to a first embodiment of the present invention. (2) and a bottom body (3) molded from a bottom body blank (30A) are joined and integrated.
The body (2) has a tapered cylindrical shape, and as shown in FIG. 7, it is formed by overlapping and joining both end edges of a substantially fan-shaped body blank (20A). . Therefore, the body (2) has an overlapping portion (21) extending along its height direction.
An inwardly folded folded portion (22) is formed at the lower end opening edge of the body (2).
An outwardly bent flange portion (23) is provided at the edge of the upper opening of the body (2). The flange portion (23) is folded downward to form a substantially horizontal flat shape. In addition to the illustrated configuration, the flange portion may be, for example, curled downward to have a generally arcuate cross section.
The bottom body (3) has a substantially inverted U-shaped cross section, having a circular horizontal bottom part (31) and a hanging part (32) extending downward from the outer peripheral edge of the bottom part (31). As shown in 8, a circular bottom body blank (30A) is drawn.
The outer surface of the hanging portion (32) of the bottom body (3) is joined to the inner surface of the lower end portion (2a) of the body (2), and the folded portion (22) of the body (2) is attached to the hanging portion (32). The body (2) and the bottom body (3) are integrated by being joined to the inner surface of the body (see FIG. 2).

Although not shown, the folded part (22) is not formed at the lower end opening edge of the body (2), and the hanging part (3) of the bottom body (3) is formed on the inner surface of the lower end (2a) of the body (2). The body (2) and the bottom body (3) can also be integrated by a connection structure in which only the outer surfaces of 32) are joined.

FIG. 3(a) shows a first embodiment of the laminate used as the material for the body blank (20A), and FIG. 3(b) shows the laminate used as the material for the bottom blank (30A). 1 shows a first aspect of a laminate that is formed.
The body blank forming laminate (20) shown in FIG. 3(a) is laminated on the metal foil layer (201) and the inner side of the body (2) out of both surfaces of the metal foil layer (201). An inner heat-fusible resin layer (202), an outer heat-fusible resin layer (203) laminated on one of both surfaces of the metal foil layer (201) that is to be the outside of the body (2), and a cup-shaped container. A content adhesion prevention layer (204) formed on the surface of the inner heat-fusible resin layer (202) so as to constitute the inner surface of (1) and containing hydrophobic fine particles (FP), Does not have a paper layer.
Also, the bottom body blank forming laminate (30) shown in FIG. The inner heat-fusible resin layer (302) laminated on the surface of the metal foil layer (301) and the outer heat-fusible resin layer (302) laminated on the surface of the metal foil layer (301) that serves as the outside (lower side) of the bottom (3). An adhesive resin layer (303) and a content formed on the surface of the inner heat-fusible resin layer (302) so as to constitute the inner surface of the cup-shaped container (1) and containing hydrophobic fine particles (FP). It has an anti-adhesion layer (304) and does not have a paper layer.

FIG. 4(a) shows a second embodiment of the laminate used as the material for the body blank (20A), and FIG. 4(b) shows the laminate used as the material for the bottom blank (30A). 2 shows a second embodiment of the laminated body.
The body blank forming laminate (20) shown in FIG. 4(a) includes a metal foil layer (201), an inner heat-fusible resin layer (202), an outer heat-fusible resin layer (203), and a content. In addition to the adhesion prevention layer (204), it has an anchor coat layer (205) formed between the inner heat-fusible resin layer (202) and the content adhesion prevention layer (204).
The bottom body blank forming laminate (30) shown in FIG. 4(b) also includes a metal foil layer (301), an inner heat-fusible resin layer (302), and an outer heat-fusible resin layer (303). , In addition to the content adhesion prevention layer (304), an anchor coat layer (305) formed between the inner heat-fusible resin layer (302) and the content adhesion prevention layer (304). is.
As shown in FIGS. 5(a) and 5(b), in the body blank-forming laminate (20) and the bottom blank-forming laminate (30), the content adhesion prevention layer (204) is preferably Part of the hydrophobic fine particles (FP) contained in (304) penetrate into the anchor coat layers (205) (305), and the other part ) is exposed on the surface of

The thickness of each laminate (20) and (30) is preferably less than 250 µm, more preferably less than 200 µm.
By setting the thickness of each of the laminates (20) and (30) within the above range, the flange portion (2) of the body (2) can be made like a paper cup using a laminate with a thickness of about 250 to 400 μm as a blank material. Of 23), the step formed by the overlapping part (21) becomes too large, or the lower end (2a) and folded part (22) of the body (2) and the hanging part (3) 31) is reliably avoided.
The laminate (20) forming the body blank (20A) and the laminate (30) forming the bottom blank (30A) are generally the same. They may have different thicknesses.

As shown in FIG. 6, in the overlapping portion (21) of the body (2), the overlapping width (W1) of both edges of the body blank (20A) is preferably 2 to 10 mm, more preferably 4 mm. ~8mm. If the overlap width (W1) is less than 2 mm, the barrier properties of the overlapped portion (21) may be impaired, and the sealing width may become too small, resulting in insufficient sealing properties. On the other hand, if the overlap width (W1) exceeds 10 mm, the width of the overlap portion (21) becomes larger than necessary, leading to an increase in cost. 20A)) and the outer part (the other edge of the fuselage blank (20A)), the inner part of the overlapping part (21) is wrinkled. There is a possibility that appearance defects such as
FIG. 6 shows a cup-shaped container formed using a body blank (20A) and a bottom blank (30A) made of the laminates (20) and (30) (see FIG. 3) of the first embodiment. Part of (1) is shown.

The metal foil layers (201) and (301) function as barrier layers to protect the contents from gas, water vapor, light and the like.
As the metal foil constituting the metal foil layers (201) and (301), aluminum foil, iron foil, stainless steel foil, copper foil, etc. can be used, and aluminum foil is preferably used. In the case of aluminum foil, either pure aluminum foil or aluminum alloy foil may be used, and either soft or hard foil may be used.

As a preferred embodiment of the metal foil layers (201) and (301), the metal foils constituting the same layers (201) and (301) have a tensile strength of 60 to 370 MPa (preferably 70 to 200 MPa), 0.2% An aluminum foil having a proof stress of 25 to 370 MPa (preferably 30 to 200 MPa) and a thickness of 40 to 200 μm (preferably 80 to 160 μm) is used. By setting the tensile strength and the 0.2% proof stress of the aluminum foil within the above ranges, sufficient strength required for a container can be obtained within a range that does not impair moldability. Further, by setting the thickness of the aluminum foil within the above range, sufficient barrier properties and moldability can be obtained.
The aluminum foil preferably has a mass ratio of Si: 0.02 to 0.5%, Fe: 0.05 to 1.7%, Cu: 0.01 to 0.3%, and Mn: 1.5%. Hereinafter, Mg: 100 ppm or less and Al: 95% by mass or more are included. In particular, by setting the Mg content to 100 ppm or less (preferably 10 ppm or less), it is possible to Adhesiveness is enhanced, and the occurrence of delamination is effectively suppressed.
Specifically, for example, aluminum foils of A8000 series (A8079H, A8021H, etc.), A1000 series (A1060H, A1100H, etc.), and A3000 series (A3004H, etc.) classified by JIS H4160 are used.
Further, as the aluminum foil, a work-hardened hard material (temper: H) is preferably used. As a result, the rigidity of the laminates (20) and (30) is further increased, and deformation such as denting is less likely to occur in the body of the container. However, a soft material (temper: O) may be used as the aluminum foil, in which case excellent formability can be obtained.

Both surfaces of the metal foil layers (201) and (301) are subjected to base treatment such as chemical conversion treatment, if necessary. Specifically, for example, on the surface of the metal foil that has been degreased,
1) phosphoric acid;
chromic acid;
2) an aqueous solution of a mixture containing at least one compound selected from the group consisting of metal salts of fluoride and non-metal salts of fluoride; and 2) phosphoric acid;
at least one resin selected from the group consisting of acrylic resins, chitosan derivative resins and phenolic resins;
3) an aqueous solution of a mixture containing at least one compound selected from the group consisting of chromic acid and chromium (III) salts;
at least one resin selected from the group consisting of acrylic resins, chitosan derivative resins and phenolic resins;
at least one compound selected from the group consisting of chromic acid and chromium (III) salts;
An aqueous solution of a mixture containing at least one compound selected from the group consisting of a metal salt of fluoride and a non-metal salt of fluoride. By doing so, a chemical conversion treatment is applied to form a film.
The film formed on the surfaces of the metal foil layers (201) and (301) by the chemical conversion treatment preferably has a chromium adhesion amount (per side) of 0.1 mg/m ² to 50 mg/m ² , particularly 2 mg/m 2 . m ² to 20 mg/m ² is preferred.
The thickness of the metal foil layers (201) and (301) is preferably 40-200 μm, more preferably 80-160 μm. By setting the thickness of the metal foil layers (201) and (301) within the above range, sufficient barrier properties and moldability can be obtained.

The inner heat-fusible resin layers (202) and (302) and the outer heat-fusible resin layers (203) and (303) protect the metal foil layers (201) and (301) and also protect the laminates (20) and (30). ), and also serves to join both edges of the fuselage blank (20A), the lower end (2a) of the fuselage (2), the folded portion (22) and the bottom body. It functions as a heat-sealing layer when it is joined to the drooping portion (32) of (3).
These heat-fusible resin layers (202), (203), (302), and (303) are, for example, general-purpose films such as heat-fusible polypropylene (PP) films and polyethylene (PE) films, or A non-stretched polypropylene film (CPP), which is excellent in heat resistance and drawability, is particularly suitable.
Also, the heat-fusible resin layers (202), (203), (302), and (303) may be composed of films or coat layers made of modified polyolefin. Examples of modified polyolefins include maleic acid, fumaric acid, mesaconic acid, citraconic acid, itaconic acid, aconitic acid, crotonic acid, succinic acid, oxalic acid, malonic acid, malic acid, thiomarinic acid, tartaric acid, adipic acid, and citric acid. , Polyolefins modified with carboxylic acids such as pimelic acid, suberic acid, azelaic acid, and sebacic acid, and carboxylic anhydrides such as maleic anhydride, itaconic anhydride, citraconic anhydride, and succinic anhydride (polypropylene (PP), polyethylene (PE), copolymers thereof, etc.), preferably maleic acid-modified polyolefin or maleic anhydride-modified polyolefin is used.
The thickness of the heat-fusible resin layers (202)(203)(302)(303) is preferably 5-80 μm, more preferably 10-60 μm. By setting the thicknesses of the heat-fusible resin layers (202), (203), (302), and (303) within the above ranges, joints between both edges of the body blank (20A) and the body (2) Sufficient adhesive strength can be obtained at the joint between the lower end (2a) and the folded part (22) and the hanging part (32) of the bottom (3), and the upper surface of the flange (23) of the body (2) can be obtained. Of these, the step formed by the overlap portion (21) can be moderated, and the sealing performance when the lid member is used for sealing is improved.

The lamination of the metal foils constituting the metal foil layers (201) and (301) and the films constituting the heat-fusible resin layers (202) (203) (302) (303) is achieved by, for example, an adhesive layer (illustrated abbreviated) by a dry lamination method. For the adhesive layer, for example, a two-component curing type polyester-polyurethane adhesive or polyether-polyurethane adhesive is used.
Due to the presence of the adhesive layer, the heat-sealable resin layers (202) and (203) on both edges of the body blank (20A) are heat-sealed, for example, in the overlap portion (21) of the body (2). Even if the thickness of the metal foil layer (201) is reduced, the metal foil layers (201) are prevented from coming into contact with each other, so the sealing property is maintained. In addition, if there is the above adhesive layer, even if the container (1) is filled with contents that permeate the heat-fusible resin layers (202) (203) (302) (303), the metal It is possible to avoid corrosion of the foil layers (201) and (301) and leakage of the contents.

The content adhesion prevention layers (204) and (304) constitute the inner surface of the cup-shaped container (1) and provide a content adhesion prevention function.
These content adhesion prevention layers (204) and (304) are formed by applying, for example, a coating liquid containing hydrophobic fine particles (FP) to the surfaces of the inner heat-fusible resin layers (202) and (302) and drying. It can be formed by The coating method of the coating liquid is not particularly limited, and examples thereof include gravure coating, spraying, bar coating and the like. The coating liquid can be prepared, for example, by uniformly dispersing hydrophobic fine particles (FP) in an organic solvent. As the organic solvent, one having a polar group is preferable, and alcohols such as ethanol and methanol are more preferable.
In addition, a binder may be added to the content adhesion prevention layers (204) and (304). As the binder, it is preferable to use a thermoplastic resin. Since the adhesion of the (FP) to the inner heat-fusible resin layers (202) and (302) is also improved, deterioration of the content adhesion prevention function due to falling off of the hydrophobic fine particles (FP) can be suppressed. The thermoplastic resin binder includes one or more of vinyl acetate-vinyl chloride copolymer, vinyl acetate-vinyl chloride-maleic acid copolymer, and ethylene-vinyl acetate copolymer. The mixing ratio of the thermoplastic resin binder and the hydrophobic fine particles (FP) is preferably 10 to 90% by mass of the thermoplastic resin binder and 90 to 10% by mass of the hydrophobic fine particles (FP) in terms of solid content. If the amount of the hydrophobic fine particles (FP) is less than 10% by mass, the required content adhesion prevention function may not be obtained. The adhesion of the hydrophobic fine particles (FP) to )(302) becomes insufficient, and the hydrophobic fine particles (FP) tend to fall off.
The hydrophobic fine particles (FP) to be contained in the content adhesion prevention layers (204) and (304) are not particularly limited, but examples include hydrophobic silica fine particles, alumina fine particles, calcium oxide fine particles, calcium carbonate fine particles, sulfuric acid fine particles, Examples include hydrophobic inorganic fine particles such as calcium fine particles and calcium silicate fine particles. Among these, it is preferable to use hydrophobic wet-process silica fine particles, which have the advantage of providing excellent content adhesion prevention performance and being easily available and inexpensive.
Hydrophobic fine particles (FP) (particularly hydrophobic wet-process silica fine particles) preferably have an average particle size of 1 to 5000 nm, more preferably 5 to 500 nm.
In addition, the adhesion amount of hydrophobic fine particles (FP) (especially hydrophobic wet-process silica fine particles) (the amount adhered to the surface of the inner heat-fusible resin layer (202) (302) after coating and drying the coating liquid) is preferably 0.3 to 3 g/m ² , more preferably 0.5 to 1.2 g/m ² .

As in the second embodiment shown in FIGS. 4 and 5, an anchor coat layer (205) is provided between the inner heat-fusible resin layers (202) (302) and the contents adhesion prevention layers (204) (304). Providing (305) makes it more difficult for the hydrophobic fine particles (FP) to fall off. Therefore, even if the content is highly viscous food or the like and the same content repeatedly contacts the inner surface of the cup-shaped container (1) due to shaking during transportation, the effect of preventing the content from sticking is not impaired.
The anchor coat layers (205) and (305) can be composed of, for example, thermosets obtained by thermosetting a resin composition containing a wax component and a resin component in which a plurality of resin acids are ester-bonded. The above resin composition is preferably alcohol-soluble, which facilitates formation of the anchor coat layers (205) (305). The resin component of the resin composition is preferably an ester bond between a linear resin acid and a sesquiterpene resin acid. Although the straight-chain resin acid is not particularly limited, it is preferable to use aroirithic acid. Moreover, the sesquiterpene-based resin is not particularly limited, but it is preferable to use at least one resin acid selected from the group consisting of shelolic acid, jalaric acid and laxijalal acid. The wax component is also not particularly limited, but is selected from the group consisting of tacardiacerol, laccerol, milliserialcole, ceryl alcohol, lignocellic acid, cerotic acid, stearic acid, palmitic acid and their respective esters. It is preferable to use one or more selected waxes.
Shellac resins may be mentioned as those containing a wax component and a resin component in which a plurality of resin acids are ester-bonded. Therefore, the anchor coat layers (205) and (305) may be formed of a heat-cured shellac resin, which provides excellent adhesion and more effectively prevents the hydrophobic fine particles (FP) from falling off. .
As shown in FIG. 5, the hydrophobic fine particles (FP) are partly embedded in the anchor coat layers (205) (305) and partly embedded in the contents adhesion prevention layers (202) (302). ) is preferably exposed on the surface of Hydrophobic fine particles (FP) such as hydrophobic wet-process silica fine particles are porous. When applied, the surface portions of the anchor coat layers (205) and (305) swell, and the pores of the hydrophobic fine particles (FP) are impregnated with the resin component of the anchor coat layers (205) and (305). By drying and curing the coating liquid in this state, part of the hydrophobic fine particles (FP) is embedded in the surface portions of the anchor coat layers (205) and (305). Therefore, according to the above aspect, it is possible to more reliably prevent the hydrophobic fine particles (FP) from coming off, and to ensure sufficient content adhesion prevention performance.
The thickness of the anchor coat layers (205) and (305) is preferably 0.5-5 μm, more preferably 1-2 μm. When the thickness of the anchor coat layers (205) and (305) is 0.5 μm or more, it is possible to sufficiently prevent the hydrophobic fine particles (FP) from falling off, and when the thickness is 5 μm or less, sufficient heat sealing can be achieved. can ensure the integrity.

Next, an example of a method of forming the cup-shaped container (1) using the laminates (20) and (30) will be described.
First, the laminate (20) is punched into a fan shape of a predetermined size to form a body blank (20A) (see FIG. 7(a)). Also, the laminate (30) is punched into a circular shape of a predetermined size to form a bottom body blank (30A) (see FIG. 8(a)).
Then, the bottom body blank (30A) is drawn to form a bottom body (3) having a substantially inverted U-shaped cross section consisting of a bottom part (31) and a hanging part (32) (see FIG. 8(b). ).
Next, after setting the bottom body (3) on the top surface of a mold (not shown) having a substantially truncated cone shape so that the top surface of the bottom part (31) overlaps, the outer peripheral surface of the mold is covered with the body for the body. After winding the blank (20A) and overlapping both edges thereof, the inner heat-sealable resin layer (202) and the outer heat-sealable resin layer (202) forming the mutually overlapping surfaces of the overlap portion (21) By heat-sealing the elastic resin layer (203), the tapered cylindrical body (2) is formed. The means for heat-sealing the overlapping portion (21) may be heat sealing using a hot plate, high-frequency sealing, ultrasonic sealing, or the like.
Next, as shown in FIG. 9, the bottom opening edge of the body (2) is folded inward, and the folded portion (22) is formed by a disk-shaped rotary mold (not shown) to form the hanging portion of the bottom (3). After being pressed against (32), the inner heat-sealing forms overlapping surfaces of the lower end (2a) and folded portion (22) of the body (2) and the hanging portion (32) of the bottom (3). By heat-sealing the elastic resin layers (202, 302) and the outer heat-sealable resin layer (303), the body (2) and the bottom (3) are joined and integrated.
In addition, the upper end opening edge of the body (2) is curled outward using a predetermined curling mold (not shown) and pressed vertically to form a flat shape, thereby forming a flange (23). ) (see FIG. 9).
Thus, the cup-shaped container (1) shown in FIGS. 1 and 2 is obtained.

[Second embodiment]
Figures 10 and 11 show a cup-shaped container (1X) according to a second embodiment of the invention.
The cup-shaped container (1X) of this embodiment is substantially the same as the cup-shaped container (1) of the first embodiment shown in FIGS. 1-9, except for the following points.
That is, the cup-shaped container (1X) is formed by overlapping and joining both end edges of a fan-shaped body blank (20A) to form a body (2). Therefore, the trunk (2) has a palm-joint portion (21X) extending along its height direction. In addition, the palm-to-palm portion (21X) is bent to one side so as to overlap the outer surface of the body (2) and is joined to the outer surface. The overlapping width of the jointed parts (21X) of the body (2) is preferably 5 to 20 mm, more preferably 10 to 18 mm. If the width is less than 5 mm, it may become difficult to seal the joint portion (21X). On the other hand, if the width exceeds 20 mm, the width of the palm-joint portion (21X) becomes larger than necessary, which leads to an increase in cost. There is a risk that when the joint portion (21X) is folded and joined to the same outer surface, an appearance defect such as wrinkles may occur.

The body blank-forming laminate (20) may be composed of the following heat-resistant resin layers instead of the outer heat-fusible resin layer (203) described above. That is, the heat-resistant resin layer is made of a resin having a melting point higher than that of the heat-fusible resin forming the inner heat-fusible resin layer (202) by 10°C or more, preferably 20°C or more. This resin is preferably a thermoplastic resin, so that the folded joint portion (21) of the body (2) and the outer surface of the body (2) can be easily joined by heat-sealing.
Specific examples of the heat-resistant resin layer include polyester (PS) films such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN), polyamide (PA) films, biaxially oriented polypropylene films (OPP ) and the like. In particular, if polyethylene terephthalate (PET) film is used as the heat-resistant resin layer, excellent water resistance can be obtained, and since it has printability and stability when the printed layer is laminated, it can be used on the surface of the body (2). It becomes easier to impart distinguishability.
The thickness of the heat-resistant resin layer is preferably 5-30 μm, more preferably 8-20 μm. If the thickness is within the above range, the metal foil layer (201) of the body blank (20A) is reliably protected by the heat-resistant resin layer, and the bent joint portion (21X) of the body (2) and this The joining to the outer surface of the superimposed body (2) is performed more reliably, and the thickness of the body blank (20A) can be reduced.

In manufacturing the above-mentioned cup-shaped container (1X), for example, the body blank (20A) is wound around the outer peripheral surface of a mold (not shown) having the bottom body (3) set on the top surface. After both edges are overlapped with each other, the inner heat-fusible resin layers (202) forming the overlapping surfaces of the both edges are heat-sealed to form a tapered tubular body. (2) is molded (see FIG. 11(a)).
Here, the heat-sealing of both edges of the body blank (20A) is usually performed by heat-sealing using a hot plate, but may be performed by high-frequency sealing, ultrasonic sealing, or the like. For heat sealing, for example, when the inner heat-sealable resin layer (202) is made of unstretched polypropylene film (CPP), sealing temperature: 160 to 220° C., load: 80 to 200 kgf, sealing time: 1 to 5 seconds. It is preferably carried out under the conditions of In addition, when the inner heat-fusible resin layer (202) is made of polyethylene film (PE), the sealing temperature is 140 to 220°C, the load is 80 to 200 kgf, and the sealing time is 1 to 5 seconds. preferably. That is, in the case of heat sealing, the melting point of the resin forming the inner heat-fusible resin layer (202) is 20 to 40°C higher than the melting point of the resin forming the inner heat-fusible resin layer (202) from both sides of both edges of the body blanks (20A) that are overlapped in a palm-to-palm shape. It is preferable to carry out while heating at temperature.
Further, the palm-to-palm portion (21X) of the body (2) is folded to one side and placed on the outer surface of the body (2), and then the two are joined by heat sealing (see FIG. 11(b)). The heat-sealing between the palm-to-palm portion (21X) of the body (2) and the outer surface of the body (2) is preferably performed by high-frequency sealing. High-frequency sealing is preferably performed under the conditions of, for example, output: 0.5 to 1.5 kW, sealing time: 3 to 5 seconds, distance from coil: 0.5 to 15 mm, load: 100 to 200 kgf.

Next, specific examples of the present invention will be described, but the present invention is not limited to the following examples.

[Example 1]
Approximately 3 g/m ² of a 2-liquid curing urethane adhesive was applied to both sides of the 80 μm thick aluminum foil (A8021H-O) that composes the metal foil layer that had undergone chemical conversion treatment, and the inside was heat-sealed. Linear low-density polyethylene (LLDPE) films having a thickness of 50 μm, which respectively constitute the elastic resin layer and the outer heat-fusible resin layer, were dry-laminated and subjected to a predetermined aging treatment.
Next, hydrophobic wet-process silica fine particles having an average particle diameter of 7 nm were added to a solution obtained by diluting a binder composed of an ethylene-vinyl acetate copolymer (20% by mass of vinyl acetate and 80% by mass of ethylene) with ethanol. The binder was mixed at a mixing ratio (solid content/mass %) of 80:20 and uniformly dispersed to prepare a coating liquid.
Then, this coating liquid is applied by gravure coating to the surface of the LLDPE film on one side constituting the inner heat-fusible resin layer, and dried at 100 ° C. for 15 seconds to obtain a hydrophobic wet type. A content-adhesion-prevention layer having an adhesion amount of silica fine particles of 0.8 g/m ² was formed to obtain a laminate for forming a body blank and a bottom blank.
The obtained laminate is punched into a predetermined shape to form a blank for the body and a blank for the bottom, and these blanks are used to manufacture a cup-shaped container of the same aspect as the first embodiment shown in FIGS. made.
The cup-shaped container had an opening diameter of 65 mm, a bottom diameter of 50 mm, a flange width of 4 mm, and a height of 95 mm.

[Example 2]
A content adhesion prevention layer was formed in which the mixing ratio of the coating liquid was fine particles:binder = 60:40, and the adhesion amount of the hydrophobic wet-process silica fine particles was 0.6 g/m ^{2 .} made the body.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 3]
The aluminum foil constituting the metal foil layer was made of A8079H-O, and the mixing ratio of the coating liquid was fine particles:binder = 30:70, and the adhesion amount of the hydrophobic wet silica fine particles was 0.3 g / m. A laminate was produced in the same manner as in Example 1 except that the contents adhesion prevention layer of No. ² was formed.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 4]
The aluminum foil constituting the metal foil layer was made of A1100H-O, and the mixing ratio of the coating liquid was fine particles:binder = 60:40, and the adhesion amount of the hydrophobic wet silica fine particles was 2.4 g / m. A laminate was produced in the same manner as in Example 1 except that the contents adhesion prevention layer of No. ² was formed.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 5]
An aluminum foil made of A3003H--O was used as the aluminum foil constituting the metal foil layer, and hydrophobic wet-processed silica fine particles having an average particle diameter of 500 nm were used, and the adhered amount of the hydrophobic wet-processed silica fine particles was 0.5. A laminate was produced in the same manner as in Example 1 except that a content adhesion prevention layer of 5 g/m ² was formed.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 6]
A resin composition liquid consisting of 10% by mass of shellac resin and 90% by mass of ethanol was applied to the surface of one side of the LLDPE film constituting the inner heat-fusible resin layer by gravure coating, followed by heating at 140° C. for 60 seconds. After drying under the conditions to form an anchor coat layer with a thickness of 2 μm, a content adhesion prevention layer was formed on the surface of the anchor coat layer in the same manner as in Example 1, and other aspects were the same as in Example 1. A laminate was produced according to the procedure.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 7]
A coating liquid is prepared by mixing hydrophobic wet-process silica fine particles with an average particle diameter of 3000 nm at a concentration of 5% by mass in an ethanol solution and uniformly dispersing the mixture, and using this coating liquid, a content adhesion prevention layer is formed. Otherwise, a laminate was produced in the same manner as in Example 6.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 8]
A8079H-O is used as the aluminum foil constituting the metal foil layer, non-stretched polypropylene film (CPP) is used as the inner heat-fusible resin layer and the outer heat-fusible resin layer, and hydrophobic A laminate was produced in the same manner as in Example 7 except that wet silica fine particles having an average particle diameter of 2000 nm were used.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 9]
An aluminum foil made of A8021H-O with a thickness of 120 μm is used as the aluminum foil constituting the metal foil layer, an unstretched polypropylene film (CPP) is used as the outer heat-fusible resin layer, and an inner heat-fusible resin layer is used. , A lacquer-type heat-sealing agent containing 80% by mass of acid-modified polypropylene, 10% by mass of wax component, and 10% by mass of tackifier was applied to one side of a chemically treated aluminum foil in an amount of 5 g/m ² . A laminate was prepared in the same manner as in Example 7 except that a coating layer having a thickness of 5 μm was formed by drying after coating so as to have a thickness of .
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 10]
An aluminum foil made of A8021H-O with a thickness of 100 μm was used as the aluminum foil constituting the metal foil layer, and a non-stretched polypropylene film (CPP) with a thickness of 50 μm was used as the inner heat-fusible resin layer and the outer heat-fusible resin layer. was used, and the drying temperature of the coated resin composition liquid was set to 150° C. to form an anchor coat layer having a thickness of 3 μm.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 11]
A laminate was produced in the same manner as in Example 10 except that the drying temperature of the coated resin composition solution was set to 160° C. to form an anchor coat layer having a thickness of 4 μm.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Example 12]
A laminate was produced in the same manner as in Example 11 except that no anchor coat layer was formed and hydrophobic wet silica fine particles having an average particle diameter of 7 nm were used.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Comparative Example 1]
A binder composed of an ethylene-vinyl acetate copolymer (20% by mass of vinyl acetate, 80% by mass of ethylene) is added to the coating liquid, but the hydrophobic wet-process silica fine particles are not used. made the body.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Comparative Example 2]
An anchor coat layer is formed on the surface of the CPP film on one side constituting the inner heat-fusible resin layer in the same manner as in Example 6, but the content adhesion prevention layer is not formed. A laminate was produced in the same manner.
Next, a cup-shaped container was produced in the same manner as in Example 1 using the body blank and bottom blank formed from the obtained laminate.

[Evaluation of content adhesion prevention property]
Samples were prepared by cutting the laminates obtained in Examples 1 to 12 and Comparative Examples 1 and 2 into predetermined sizes (100 mm×100 mm). Each sample was placed horizontally so that the surface of the side constituting the inner surface of the cup-shaped container (the surface of the content adhesion prevention layer; however, in the case of Comparative Example 3, the surface of the inner heat-fusible resin layer) was the upper surface. After placing it on a movable table and dropping aloe yogurt (manufactured by Morinaga Milk Industry Co., Ltd., trademark "Morinaga Aloe Yogurt") on the top surface of each sample as a droplet of about 1 g, the movable table is placed in a horizontal state (tilt angle = 0 degrees). At this time, the angle of inclination of each sample with respect to the horizontal plane when the droplet started to roll on the upper surface of each sample was measured, and the content adhesion prevention property was evaluated according to the following criteria. Table 1 shows the evaluation results.
(criterion)
“◎”…Inclination angle at the beginning of rolling <15°
“○” … 15° ≤ initial inclination angle < 30°
"△" ... 30 ° ≤ initial inclination angle < 45 °
“×”…45°≦Tilt angle at the beginning of rolling

[Evaluation of drop-off prevention of hydrophobic fine particles]
Each sample obtained by cutting the laminates obtained in Examples 1 to 12 and Comparative Examples 1 and 2 into a predetermined size (100 mm × 300 mm) was coated on the side constituting the inner surface of the cup-shaped container (prevention of adhesion of contents The surface of the layer (however, in the case of Comparative Example 3, the surface of the inner heat-sealable resin layer) was placed on a horizontal stand so that it faced up. Then, a weight (500 g) wrapped with a cloth impregnated with ethanol was placed vertically on the upper surface of each sample, and this weight was slowly moved over a length of 200 mm while rubbing the upper surface of each sample. I wiped it off. Then, from the difference in mass of each sample before and after wiping, the amount of hydrophobic fine particles adhering to the cloth (that is, the amount of hydrophobic fine particles falling off) is calculated, and the drop-off prevention property of the hydrophobic fine particles is evaluated based on the following criteria. evaluated. Table 1 shows the evaluation results.
(criterion)
"○" ... Amount of hydrophobic fine particles attached to cloth < 0.1 g
"△" ... 0.1 g ≤ adhesion amount of hydrophobic fine particles to cloth < 0.2 g
"X" ... 0.2 ≤ amount of fine particles adhered to cloth

[Evaluation of heat sealability]
Each sample was prepared by cutting the laminates obtained in Examples 1 to 12 and Comparative Examples 1 and 2 to a width of 15 mm.
In addition, on one side of a 0.02 mm thick aluminum foil made of A1N30H-O, a polyethylene terephthalate (PET) film with a thickness of 0.012 mm is applied as a protective layer, and a two-component curable polyester polyurethane resin adhesive is used. In addition to dry lamination, a 0.03 mm thick LLDPE film or a 0.03 mm thick CPP film as a sealing layer is applied to the other surface of the aluminum foil using a two-component curable polyester polyurethane resin adhesive. By laminating and aging in an environment of 40° C. for 5 days, a laminate for lid material was produced. Then, the obtained laminate was cut into strips having a width of 15 mm to form lid material samples.
Then, of the both surfaces of each sample of the laminates of Examples 1 to 12 and Comparative Examples 1 and 2, the surface of the side constituting the inner surface of the cup-shaped container (the surface of the content adhesion prevention layer. However, Comparative Examples 1 and 2 In the case of , the surface of the inner heat-fusible resin layer.) and one end of the surface of the seal layer of the lid material sample were heat-sealed under the sealing conditions of 150 to 180° C., 0.2 MPa, and 3 sec. In addition, for the laminates of Examples 1 to 7, lid material samples whose sealing layers were made of LLDPE films were used, and for the laminates of Examples 8 to 12 and Comparative Examples 1 and 2, the sealing layers were made of CPP films. A different lid material sample was used.
Next, for each sample of the laminates of Examples 1 to 12 and Comparative Examples 1 and 2, the lid material sample was pulled in the 180° direction at a rate of 100 mm/min, and the maximum load at 180° peeling was measured, This was defined as the heat seal strength.
Further, of the two surfaces of each sample of the laminates of Examples 1 to 12 and Comparative Examples 1 and 2, the surface opposite to the above and one end of the surface of the sealing layer of the lid material sample were sealed under the same sealing conditions as above. and the heat seal strength was measured and used as a reference value.
Then, the heat sealability was evaluated based on the following criteria based on the rate of decrease or increase of the heat seal strength of each sample with respect to the reference value. Table 1 shows the evaluation results.
(criterion)
"◎" ... Strength decrease / increase rate < 10%
"○" ... 10% ≤ strength reduction rate < 20%
"x" ... 20% ≤ strength reduction rate

INDUSTRIAL APPLICABILITY The present invention can be suitably used as a cup-shaped container for filling and packaging semi-solids and highly viscous liquids such as ice cream, yoghurt and smoothies.

(1) (1X): cup-shaped container
(2): Torso
(2a): Lower end of fuselage
(21): Overlap part
(21X): Joining hands
(22): Folding part
(23): Flange
(20A): Fuselage blank
(20): Laminate
(201): Metal foil layer
(202): Inner heat-sealable resin layer
(203): Outer heat-sealable resin layer
(204): Content adhesion prevention layer
(205): Anchor coat layer
(3): Bottom body
(31): Bottom
(32): Drooping part
(30A): Blank for bottom body
(30): Laminate
(301): Metal foil layer
(302): Inner heat-sealable resin layer
(303): Outer heat-sealable resin layer
(304): content adhesion prevention layer
(305): Anchor coat layer
(FP): Hydrophobic fine particles

Claims (8)

Both edges of the body blank are overlapped and joined to form a cylindrical body, a bottom of the bottom blank, and a drooping portion extending downward from the outer peripheral edge of the bottom. A cup-shaped container comprising a bottom body having a substantially inverted U-shaped cross-section formed by molding into a cup, wherein the body and the bottom body are integrated by joining the outer surface of the hanging part of the bottom body to the inner surface of the lower end part of the body. and
Each of the body blank and the bottom blank has a metal foil layer, an inner heat-fusible resin layer laminated on one of both sides of the metal foil layer that is to be the inner side of the cup-shaped container, and both sides of the metal foil layer. Of these, the outer heat-fusible resin layer laminated on the outer surface of the cup-shaped container, and the hydrophobic fine particles formed on the surface of the inner heat-fusible resin layer so as to constitute the inner surface of the cup-shaped container A cup-shaped container, characterized in that it is formed from a laminate comprising a content adhesion prevention layer containing 2. The cup-shaped container according to claim 1, wherein the hydrophobic fine particles have an average particle size of 1 to 5000 nm, and the hydrophobic fine particles adhere in an amount of 0.3 to 3 g/m ² . 3. A cup-shaped container according to claim 1 or 2, wherein the hydrophobic fine particles are composed of hydrophobic wet silica fine particles. The content adhesion prevention layer contains a binder made of a thermoplastic resin,
4. The cup-shaped container according to claim 3, wherein the blending ratio of the binder and the hydrophobic fine particles is 10 to 90% by mass of the binder and 90 to 10% by mass of the hydrophobic fine particles in solid content ratio. 5. The cup-shaped container according to any one of claims 1 to 4, wherein an anchor coat layer is formed between the inner heat-fusible resin layer and the anti-adhesion layer. 6. The cup-shaped container according to claim 5, wherein the hydrophobic fine particles are partly embedded in the anchor coat layer and partly exposed on the surface of the content adhesion prevention layer. The anchor coat layer is made of a thermoset product of an alcohol-soluble resin composition containing a wax component and a resin component in which a linear resin acid and a sesquiterpene resin acid are ester-bonded. 6 cup-shaped container. the linear resin acid is aloyritic acid,
the sesquiterpene-based resin acid is at least one resin acid selected from the group consisting of sherolic acid, jalaric acid, and laxijarar acid;
The wax component is at least one wax component selected from the group consisting of tacardiacerol, laxerol, milliserial chol, ceryl alcohol, lignoceric acid, cerotic acid, stearic acid, palmitic acid and esters thereof,
8. The cup-shaped container according to claim 7, wherein the anchor coat layer has a thickness of 0.5 to 5 μm.

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