JP2020125134A - Container, container with film lid, and beverage/food packaged in container with film lid - Google Patents

Abstract

To provide a container, a container with a film lid, and beverage/food packaged in the container with the film lid, that can be easily unsealed, while securing required seal strength using a simple constitution, and that can prevent occurrence of delamination of the film when opening a film lid comprised of multilayer film.SOLUTION: A container 1 is a cup-shaped container having flange parts 2C on a peripheral edge of an opening 2a that is open to the upper end of a container body 2. On the outer peripheral edge part of the top face of the flange part 2C, an inclined portion 2c obliquely inclining downward is formed over the whole circumference. In a container with a film lid, the film lid is joined to a flat part 2d excluding the inclined portion 2c of the top face of the flange part 2C of the container 1. Here, the film lid may be composed of multilayer film. Beverage/food packaged in the container with the film lid comprises: the container with the film lid; and beverage/food filled into the container with the film lid and tightly sealed.SELECTED DRAWING: Figure 2

Description

The present invention relates to a container for containing contents, a container with a film lid for containing the contents in a sealed state in the container, and a food/beverage product in a container with a film lid.

Food products such as fermented milk and other foods and drinks are often sold in a state of being sealed in a container with a film lid. Such a container with a film lid includes a cup-shaped container in which a flange portion is formed on the periphery of the opening of the container body, and a film lid that covers the opening of the container, and the film lid is a flange of the container body. The container is joined by heat sealing (heat fusion) or the like to seal the inside of the container.

By the way, a container with a film lid is required to be able to be easily opened by the user without requiring a large amount of force. Various containers have been proposed as an easily openable container to satisfy such a demand. Has been done.

For example, Patent Document 1 proposes a container having a multilayer structure including a seal layer having a seal surface that is sealed with a film lid and a base material layer provided on a surface of the seal layer opposite to the seal surface. There is. The container is peeled off between the seal layer and the base material layer when the container is opened. An annular cut is provided in the flange portion of the container, and the peeling of the seal layer and the base material layer is stopped at this cut position. Thereby, the film lid can be easily peeled from the container without peeling between the seal layer and the base material layer inside the cut.

JP, 2014-198575, A

The invention described in Patent Document 1 has a problem that the position and depth of the cut are required to be accurate, and the seal cannot be easily opened if the inner edge of the cut is sealed. Further, when the film lid is a multi-layered film formed by laminating a plurality of films, there is a problem that delamination occurs in the film even during opening and a part of the film remains on the flange portion of the container. It was

The present invention has been made in view of the above problems, and an object thereof is to ensure the necessary sealing strength with a simple structure, which can be easily opened, and the film lid is made of a multilayer film. An object of the present invention is to provide a container capable of preventing delamination of the film at the time of opening, a container with a film lid, and a food/beverage product in a container with a film lid.

The container according to the present invention is a cup-shaped container in which a flange portion is formed at the peripheral edge of an opening opening at the upper end of the container body, and is inclined downward toward the outer peripheral edge portion of the upper surface of the flange portion. The inclined portion is formed over the entire circumference.

The container with a film lid according to the present invention comprises a film lid joined to a flat portion other than the inclined portion on the upper surface of the flange portion of the container.

The food/beverage product in a container with a film lid according to the present invention includes the container with a film lid, and the food/drink product hermetically filled in the container with a film lid.

According to the present invention, since the inclined portion is formed on the outer peripheral edge portion of the upper surface of the flange portion of the container body, and the film lid is joined to the flat portion other than the inclined portion of the upper surface of the flange portion, the entire upper surface of the flange portion is covered. As compared with a container in which the film lid is heat-sealed, the peeling force of the film lid at the time of opening is small, and the container can be opened more easily while ensuring the necessary sealing strength. For this reason, especially when the film lid is composed of a multilayer film, the occurrence of delamination of the film at the time of opening is prevented, and a problem that a part of the film remains on the flange portion of the container body may occur. There is no. Since such an effect can be obtained by a simple configuration in which the inclined portion is simply formed on the outer peripheral edge portion of the upper surface of the flange portion of the container body, the molding cost of the container can be suppressed to be low. it can.

It is a perspective view which fractures and shows a part of container concerning this embodiment. It is a longitudinal cross-sectional view of the container according to the present embodiment. FIG. 3 is an enlarged detailed view of a portion A of FIG. It is a disassembled perspective view which fractures|ruptures and shows a part of container with a film lid which concerns on this embodiment. It is a longitudinal cross-sectional view of the container with a film lid which concerns on this embodiment. FIG. 6 is an enlarged detailed view of part B of FIG. 5. It is a figure similar to FIG. 6 which shows the state of the initial stage of opening. It is a longitudinal cross-sectional view which shows the state of the opening initial stage of the container with a film lid which concerns on this embodiment. 5 is a cross-sectional view of the flange portion of the container according to the first embodiment. FIG. 6 is a cross-sectional view of a flange portion of a container according to Comparative Example 1. FIG.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

(Constitution of container)
First, the configuration of the container according to the present embodiment will be described below based on FIGS. 1 to 3.

FIG. 1 is a perspective view showing a part of the container according to the present embodiment by breaking it, FIG. 2 is a vertical sectional view of the container, and FIG. 3 is an enlarged detailed view of a portion A of FIG. As shown in FIGS. 1 and 2, the container 1 includes a cup-shaped (bottomed cylindrical) container body 2 whose diameter increases upward. Here, as shown in FIG. 2, the container body 2 includes a disc-shaped bottom portion 2A that is raised and a tapered cylindrical body portion 2B, and a circular opening portion is provided at the upper end of the body portion 2B. 2a is formed. In the container 1, the opening 2a side is the upper side and the bottom 2A side is the lower side.

A circular ring-shaped flange portion 2C is horizontally and integrally projected outward in the radial direction at the peripheral edge of the opening portion 2a that opens at the upper end of the container body 2 (body portion 2B). Here, in the present embodiment, as shown in detail in FIG. 3, the thickness of the base end portion of the flange portion 2C is larger than the thickness of other portions (portions excluding the base end portion of the flange portion 2C). It is set. Specifically, the outer peripheral surface of the upper end of the container body 2 (body 2B) and the bottom surface of the base end of the flange 2C are connected by a concave curved surface 2b. The curved surface refers to a surface having a single curvature or a plurality of curvatures. The curved surface includes, for example, a surface whose cross section has a curve of a part of a perfect circle or an ellipse, a part of a curve of a parabola, or a combination thereof.

The container 1 (container body 2) is integrally molded by injection molding of resin. As the resin, for example, an olefin resin or a polyester resin is used. Examples of the olefin resin include polyethylene (PE) and polypropylene (PP). Examples of the polyester resin include polyethylene terephthalate (PET) and polybutylene terephthalate (PBT).

By the way, in the container 1 according to the present embodiment, as shown in detail in FIG. 3, in the outer peripheral edge portion of the upper surface of the flange portion 2C of the container body 2, the inclined portion 2c inclined obliquely downward is entirely formed. The portion formed over the circumference and excluding the inclined portion 2c on the upper surface of the flange portion 2C constitutes a flat portion 2d as a horizontal plane. The horizontal plane is a plane perpendicular to the height direction (up and down direction) of the container 1.

In the present embodiment, as shown in FIG. 3, the radial length a of the flat portion 2d of the flange portion 2C and the radial length b of the inclined portion 2c are a=5.0 mm and b=1.0 mm, respectively. Is set to. That is, the overall length of the flange portion 2C in the radial direction is 6.0 mm. Further, the thickness t1 of the flat portion 2d (excluding the base end portion) and the thickness t2 of the tip end portion of the flange portion 2C are set to t1=0.8 mm and t2=0.6 mm, respectively. The inclination angle θ of the inclined portion 2c of the flange portion 2C with respect to the horizontal plane is preferably an angle at which the height difference Δh of the inclined portion 2c is greater than 0.1 mm, and is an angle at which Δh is 0.2 mm or more. Is especially desirable. The above values a, b, t1, and t2 are examples, but it is desirable that the radial length b of the inclined portion 2c be at least b=1.0 mm as in the present embodiment. ..

(Vessel with film lid)
Next, the configuration of the container with a film lid according to the present embodiment will be described below based on FIGS. 4 to 6.

4 is an exploded perspective view showing a part of the container with a film lid according to the present embodiment by breaking it, FIG. 5 is a vertical sectional view of the container with a film lid, and FIG. 6 is an enlarged detailed view of a portion B of FIG. .. As shown in FIGS. 4 and 5, in the container 10 with a film lid according to the present embodiment, the film lid 11 is joined (heat-sealed) to the flat portion 2d other than the inclined portion 2c on the upper surface of the flange portion 2C of the container 1. 2) and the opening 2a of the container 1 (container main body 2) is sealed with a film lid 11. As will be described later, the container 1 is pre-filled with the contents in the manufacturing process. The contents are food and drink, medicines, cosmetics, and the like. Examples of the form of food and drink include liquid, paste, solid, and powder. Food and beverages include milk, soft drinks (green tea, coffee, black tea, etc.), dairy products (fermented milk, yogurt, cheese, ice cream, etc.), bread, biscuits, crackers, pizza crust, powdered milk (milk powder, etc.), confectionery. Examples thereof include liquid foods, liquid foods, sick foods, health foods, nutritional foods, soy foods, powdered protein foods, frozen foods, food compositions, processed foods and other commercially available foods and drinks. The food and drink are not limited to the above, and include, for example, concentrated juice powder, concentrated vegetables, soup raw materials, concentrated minerals, deep sea water extraction minerals, cereal foods, vitamins, sugars, herbs, fermentative bacteria, and the like. .. In this embodiment, the container 1 is filled with fermented milk as the content. The food and drink that is hermetically filled in the container with a film lid 10, that is, the food and drink in the container with a film lid includes the container with a film lid 10 and the food and drink that is hermetically filled in the container with a film lid 10.

As shown in FIG. 4, the film lid 11 for sealing the opening 2a of the container body 2 is made of a thin circular film having an outer diameter slightly larger than the outer diameter of the flange portion 2C of the container 1 (container body 2). There is. On a part of the outer periphery of the film lid 11, an unsealing tab 11a is integrally provided so as to be grasped by the user when unsealing.

Here, in the present embodiment, the film lid 11 is composed of a multilayer film formed by laminating a plurality of films of different types. Specifically, the layer structure of the film lid 11 is as follows.

PET (9 to 16 μm)/AL (6 to 25 μm)/PE (20 μm)/hot melt Here, PET is polyethylene terephthalate, AL is aluminum, and PE is polyethylene. The hot melt is an adhesive that melts and adheres with heat, and a thermoplastic resin such as ethylene vinyl acetate is used for this. Further, in the above, the number in parentheses is the thickness of each layer.

As shown in FIG. 4, the film lid 11 formed of the multi-layer film in this manner has the upper surface of the flange portion 2C in a state in which the periphery thereof is positioned along the flange portion 2C of the container 1 (container body 2). Is covered from above in the direction of the arrow in the figure, and the circular ring-shaped outer peripheral edge portion of the bottom surface thereof is pressed against the flat portion 2d other than the inclined portion 2c on the upper surface of the flange portion 2C. Then, when the outer peripheral edge portion of the film lid 11 is heated from this state, the hot melt of the lowermost layer (the layer in contact with the upper surface of the flange portion 2C) of the film lid 11 is melted, and the outer peripheral edge portion of the film lid 11 is melted. Is bonded to the flat portion 2d formed on the upper surface of the flange portion 2C of the container 1 (container body 2). As a result, as shown in FIG. 5, the opening 2a of the container 1 (container body 2) is sealed by the film lid 11, and the contents previously filled in the container 1 are sealed in the container 1. .. At this time, as described above, since the outer diameter of the film lid 11 is set to be slightly larger than the outer diameter of the flange portion 2C of the container 1 (container body 2), as shown in FIGS. The lid 11 is adhered in such a manner that its outer peripheral edge is slightly protruded outward in the radial direction of the flange portion 2C of the container 1 (container body 2). Further, since the film lid 11 is not adhered to the inclined portion 2c formed on the upper surface of the flange portion 2C of the container 1 (container body 2), a predetermined gap δ (see FIG. 6) is formed between them. Has been formed.

In the present embodiment, hot melt was used to bond the film lid 11 to the flange portion 2C of the container 1 (container main body 2), but the film lid 11 may be bonded by welding by heat sealing or laser irradiation. Welding or the like can be used.

Further, in the present embodiment, a multilayer film having a multilayer structure is used for the film lid 11, but the layer structure of the film lid 11 made of the multilayer film may be the following other than the above.

PET (9 to 16 μm)/AL (6 to 25 μm)/PE (20 μm)/Hot melt PET (9 to 16 μm)/VMPET (9 to 16 μm)/Sealant film ONY (9 to 25 μm)/AL (6 to 25 μm) /PE (20 μm)/hot melt ONY (9 to 25 μm)/AL (6 to 25 μm)/sealant film Here, VMPET is polyethylene terephthalate deposited with a metal such as aluminum, and ONY is drawn nylon. Further, in the above, the number in parentheses is the thickness of each layer.

(Action and effect)
Next, the operation and effect of the film lidded container 10 configured as described above will be described below with reference to FIGS. 7 and 8.

FIG. 7 is a view similar to FIG. 6 showing the initial state of opening the container with a film lid according to this embodiment, and FIG. 8 is a longitudinal sectional view showing the initial state of opening the container with a film lid.

As shown in FIG. 5, when the container 10 with a film lid in a hermetically sealed state is opened and the content (not shown) (fermented milk in the present embodiment) is taken out from the container 10 with a film lid, the user needs to use the film. The opening tab 11a (see FIG. 4) formed on a part of the outer periphery of the lid 11 is pinched by hand and rolled up. Then, the joint portion (adhesive portion) of the film lid 11 is gradually peeled off from the flange portion 2C of the container 1 (container body 2) starting from the portion where the opening tab 11a is formed. In this case, in the present embodiment, as described above, the thickness of the base end portion of the flange portion 2C of the container 1 (container body 2) is set to be thicker than the thickness of other portions of the flange portion 2C. The rigidity of the ends is higher than the rigidity of other parts. Therefore, the flange portion 2C is not largely elastically deformed around the base end portion by the force of peeling the film lid 11 from the flange portion 2C, and almost all the force applied by the user is effective as a force for peeling the film lid 11. It is often used, and the film lid 11 can be easily peeled off from the flange portion 2C of the container 1 (container body 2) with a small force, and the easy opening property of the film lidded container 10 is enhanced.

Further, in the container 10 with a film lid according to the present embodiment, the inclined portion 2c is formed on the outer peripheral edge portion of the upper surface of the flange portion 2C of the container 1 (container body 2), and the inclined portion 2c of the upper surface of the flange portion 2C is formed. Since the film lid 11 is joined (bonded) to the flat portion 2d other than the above, the peeling force of the film lid 11 at the time of opening is larger than that of the conventional container in which the film lid is joined over the entire upper surface of the flange portion 2C. It is small, and the container 1 can be opened more easily while ensuring the required sealing strength. Therefore, when the film lid 11 is formed of a multilayer film having a multilayer structure as in the present embodiment, delamination of the film at the time of opening is prevented, and the container 10 with a film lid is opened. After that, the problem that a part of the film remains on the flange portion 2C of the container 1 (container body 2) does not occur.

The effect as described above is obtained by a simple configuration in which the inclined portion 2c is simply formed on the outer peripheral edge portion of the upper surface of the flange portion 2C of the container body 2, so that the molding cost of the container 1 can be kept low and the film concerned. The cost of the lidded container 10 can be reduced.

When the film lid 11 is peeled off from the flange portion 2C of the container 1 (container main body 2) and the film lidded container 10 is opened as described above, the user stores the contents stored in the container 1 inside. The product (fermented milk in this embodiment) can be taken out.

(Example)
Next, examples of the present invention will be described.

Two types of containers having different shapes of the flange portion of the container were referred to as Example 1 and Comparative Example 1. That is, as shown in FIG. 9A, the container in which the inclined portion 2c was formed on the outer peripheral edge portion of the upper surface of the flange portion 2C was set as Example 1. As shown in FIG. 9B, Comparative Example 1 was a conventional container in which the entire upper surface of the flange portion 102C was a flat surface. Then, with respect to the containers according to Example 1 and Comparative Example 1, the openability evaluation and the delamination state of the film lid were evaluated under the same conditions.

As shown in FIG. 9A, in the container according to Example 1, the flat portion 2d of the flange portion 2C has a radial length of 5.0 mm, the inclined portion 2c has a radial length b of 1.0 mm, and a total radial length. Is 6.0 mm, the thickness of the tip portion of the flange portion 2C is 0.6 mm, and the thickness of the flat portion 2d (excluding the base end portion) is 0.8 mm. As shown in FIG. 9B, in the container of Comparative Example 1, the flange 102C has a radial total length of 6.0 mm, and the flange 102C (excluding the base end) has a thickness of 0.8 mm.

The same film lid is used for both containers, and a multilayer film having the following layer structure is used.

PET (16 μm)/AL (12 μm)/PE (20 μm)/hot melt Under the same conditions (pressure: 0.4 MPa, time 0.9 seconds, temperature 150° C.), the film lid having the above layer structure has a flange portion of both containers. It was adhered to 2C and 102C, respectively.

1) Opening property evaluation (opening strength measurement):
<Comparison method>
The unsealing strength (force required for unsealing) of both containers was measured using a push-pull gauge (not shown). Specifically, each opening tab of both film lids was pulled obliquely at an angle of 45°, and the maximum value of the force required for opening was measured.

<Results>
Table 1 shows the results of the unsealing strength measured for each of 24 (n=24) containers according to Example 1 and the container according to Comparative Example 1.

As is clear from the results shown in Table 1, the unsealing strength (16.7N) of the container according to Example 1 is smaller than the unsealing strength (19.9N) of the container according to Comparative Example 1. Therefore, it was demonstrated that the container according to Example 1 has a higher openability than the container according to Comparative Example 1.

2) Evaluation of delamination state:
<Comparison method>
Each 600 (n=600) containers according to Example 1 and the container according to Comparative Example 1 were opened in the refrigerator, the film of the film lid was delaminated, and the flange portion 2C (see FIG. 9A), the flange The number of containers in which a part of the film remained in the portion 102C (see FIG. 9B) was counted.

Further, the state of delamination when the height difference Δh of the inclined portion 2c of the flange portion 2C was Δh=0.1 mm and 0.2 mm was examined by counting the number of containers in which delamination occurred.

Since the film lid is generally easily peeled at a low temperature, the evaluation of delamination was performed in a refrigerator under severe conditions.

<Results>
The evaluation results of the delamination state of the container according to Example 1 and the container according to Comparative Example 1 are as shown in Table 2.

As shown in Table 2, in the film lid of the container according to Comparative Example 1, interlayer peeling occurred in the film in 124 containers (occurrence rate: 20.6%), whereas in Example 1, according to Example 1. No delamination of the film occurred on the film lid of the container (occurrence rate: 0%).

Further, the results of performing the delamination state on 80 (n=80) containers when the height difference Δh of the inclined portion 2c of the flange portion 2C is Δh=0.1 mm and Δh=0.2 mm. It shows in Table 3.

From the results shown in Table 3, when the height difference Δh of the inclined portion 2c of the flange portion 2C is Δh=0.1 mm, delamination occurred in one container (occurrence rate: 1.3%). , Δh=0.2 mm, delamination did not occur in any of the containers (occurrence rate: 0%).

From the above examples, the container 10 with a film lid according to the present embodiment (see FIG. 5) has high unsealing property, and delamination of the multilayer film when the film lid 11 is composed of a multilayer film. It has been proved that the occurrence of

Although a multilayer film is used as the film lid 11 in the above embodiment, a single layer film may be used for the film lid 11.

Further, in the above, the embodiment in which the present invention is applied to the container 1 having a tapered cylindrical shape has been described, but the container 1 may have any shape, for example, a polygonal cylinder shape, an elliptic cylinder shape, and a square shape. The present invention can be similarly applied to a cylindrical container and a container with a film lid including the same.

In addition, the present invention is not limited to application to the embodiment described above, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Of course.

1 Container 2 Container Main Body 2A Bottom 2B Body 2C Flange 2a Opening 2b Concave Curved 2c Inclined 2d Flat Part 10 Container with Film Lid 11 Film Lid 11a Opening Tab a Radial Length of Flat Part b Diameter of Inclined Part Direction length t1 Thickness of flat part t2 Thickness of tip part Δh Height difference of inclined part θ Inclination angle of inclined part

Claims (8)

A cup-shaped container in which a flange portion is formed on the periphery of an opening opening at the upper end of the container body,
A container formed by forming an inclined portion, which is inclined obliquely downward, over the entire circumference on the outer peripheral edge of the upper surface of the flange portion. The container according to claim 1, wherein a radial length of the inclined portion is set to at least 1.0 mm. The container according to claim 1 or 2, wherein an inclination angle of the inclined portion with respect to a horizontal plane is an angle at which a height difference of the inclined portion becomes a value larger than 0.1 mm. The container according to any one of claims 1 to 3, wherein a thickness of a base end portion of the flange portion is set to be thicker than thicknesses of other portions. The container according to claim 4, wherein the upper end outer peripheral surface of the container main body and the base end bottom surface of the flange portion are connected by a concave curved surface. A container with a film lid formed by joining a film lid to a flat portion other than the inclined portion on the upper surface of the flange portion of the container according to any one of claims 1 to 5. 7. The container with a film lid according to claim 6, wherein the film lid is composed of a multilayer film formed by laminating a plurality of films of different types. A container with a film lid according to claim 6 or 7,
A food/beverage product in a container with a film lid, comprising the food/beverage product hermetically filled in the container with a film lid.

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