JPH0737863Y2 - Container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a container, more specifically, a cylindrical sheet formed by a laminated sheet and a lid having a bent portion formed at the peripheral edge of the sheet. The present invention relates to a container in which the opening of the container body is covered.

(Prior Art) As a lid for sealing the upper and lower open ends of a tubular container body to make a container for juice or the like, a lid having a shape shown in FIGS. 3 to 5 is known. That is, FIG. 3 is a schematic front view of an example of such a lid, FIG. 4 is a schematic plan view of the same, and FIG. 5 is a schematic vertical sectional front view showing a state where the lid is used to seal the cylindrical container body. In the figure, 11a is a top lid, 11b is a bottom lid, 12 is a lid body,
Reference numeral 13 indicates a peripheral edge portion of the lid main body, and 14 indicates a peripheral edge portion 13 of the lid main body 12.
On the other hand, a rising part rising at a right angle, 15 is a bending part further bent outward from the rising part 14, and 16 is a bending part.
A gripping portion that is bent further from 15 and sandwiches the open edge of the container body, 17 is a mouth for the contents of the container provided on the upper lid 11a, 1
8 is a cover piece for the drinking spout 17 and 19 is a notch provided in the peripheral edge portion 13 of the lid, which is the outermost sandwiching portion of the peripheral edge portion.
This is for facilitating the work when 16 is bent and the open edge of the container body is clamped. 20 is a cylindrical container body.

As is clear from the drawing, the lid shown here is such that a rising portion 14 is first formed in the peripheral portion 13 of the lid main body 12 having a planar shape, and the outside of the rising portion 14 is further bent to form a bent portion 15.
Is formed. To cover the container body 20 with the lid (shown in FIGS. 3 and 4) having such a shape, as shown in FIG. The outer peripheral portion is bent so as to sandwich the open edge of the container body 20 to form the sandwiching portion 16 (that is, the rising portion 14, the bending portion 15 and the sandwiching portion 16 form a bent portion having a U-shaped cross section). The rising part 14 and the sandwiching part 16 make the container body 20
While tightening the open edge of the above, both contact parts are adhered and sealed. In this way, the lid is sealed, but as a work, after the bottom lid 11b is applied, the contents such as juice are filled, and then the upper lid 11a is applied. In order to drink the contents, the drinking spout covering piece 18 provided on the upper lid is pulled, and the drinking spout 17 is removed by removing it.

(Problems to be Solved by the Invention) A flat lid body used for a container as described above has a bent portion having a U-shaped cross section, and a vinyl chloride resin layer is conventionally used as a material for the lid. / Aluminum foil layer /
A sheet formed by laminating three polyethylene layers has been used. The above polyethylene layer is the third layer from this sheet.
~ The lid formed in the form shown in Fig. 5 serves as an adhesive for adhering and sealing the container body to the container body, the aluminum foil imparts gas barrier property to the lid, and the vinyl chloride resin layer bends. This is to impart strength such as shape retention and impact resistance of the lid having the portion. However, vinyl chloride resin is not preferable in terms of environmental hygiene, since it produces harmful chlorine gas when it is subjected to incineration treatment after the lid is used. Therefore, it has been strongly demanded to find an alternative to the vinyl chloride resin. As alternatives, polystyrene, stretched polyester, polypropylene, ABS resin, BS resin, polycarbonate resin, etc. have been tried, but none of them have sufficiently satisfactory results.

(Means for Solving the Problems) The present invention has been studied for the purpose of obtaining a container provided with a lid satisfying the above-mentioned demands, and by unifying and stacking a non-stretched polyester film and a stretched polyester film, It succeeded in achieving the purpose.

Hereinafter, the present invention will be described in detail.

First, FIGS. 1 and 2 illustrating the structure of a laminated sheet constituting a lid used in the container of the present invention will be described.

FIG. 1 is a schematic vertical sectional front view of an example of a laminated sheet used for a lid, particularly an upper lid of a container of the present invention, and FIG. 2 is a schematic vertical sectional front view of another example of a laminated sheet used for a lower lid. In the stacking order of the sheets shown in FIG. 2, the side in contact with the container body is shown as the upper layer in accordance with the state of being used as the lower lid.

In the figure, 1 is a polyethylene layer (hereinafter sometimes abbreviated as a PE layer), and this PE layer 1 is a heat-sealing one (for example, low density polyethylene). Reference numeral 2 is a non-stretched polyester layer, and as a typical one, a non-stretched polyethylene terephthalate layer (hereinafter sometimes abbreviated as A-PET layer) is used. Reference numeral 3 is a stretched polyester layer, and as a typical one, a stretched polyethylene terephthalate layer (hereinafter sometimes abbreviated as O-PET layer) is used. 4 is an aluminum foil layer (hereinafter referred to as Al
(Abbreviated as a layer) 5 is an O-PET layer, 6 is A-PET
Layer, 7 is PE layer, 31 is O-PET layer, 32 is Al layer, and 33 is PE layer.

The one shown in FIG. 1 is used as an upper lid, and this upper lid has openings (34 and 35 in the figure) which serve as drinking mouths.
(The portion indicated by the reference numeral) is provided in advance, and this opening is covered with a cover piece 18 that closes the opening. The cover piece 18 is composed of a laminated sheet of an O-PET layer 31 having excellent strength, an Al layer 32 having high gas barrier properties, and a PE layer 33 having heat sealing properties.

The laminated sheet of the upper lid is laminated in the order of the Al layer 4, the O-PET layer 5 and the PE layer 1 following the A-PET layer 2 which is the outermost when the lid is applied. In the case of FIG. 1, this PE layer 1 is
It consists of two layers, a layer 1a and a layer 1b, and this is done for convenience of manufacturing. That is, when manufacturing this product, first, the A-PET layer 2, the Al layer 4, the OP
A laminated sheet composed of the ET layer 5 and the PE layer 1a is manufactured by, for example, dry lamination, and then a hole serving as a drinking hole is formed at a predetermined position of the sheet. The PE film to be the PE layer 1b is laminated on the PE layer 1a of the laminated sheet having the holes.

On the other hand, a laminated sheet to be a mouthpiece covering is manufactured in the same manner and punched into a predetermined shape, and the individual mouthpiece coverings are laminated to form the upper lid main body so that the state shown in FIG. 1 is obtained. When it is applied to a portion of the sheet that hits the mouth and heated and pressed, the PE layer 33 of the mouthpiece covering piece and the laminated sheet 1b of the lid body directly contact with each other at the opening serving as the mouth, where heat sealing is performed. Done. The portion indicated by 34 in FIG. 1 is the PE layer 1b, and the portion indicated by 35 is the PE layer 33. Although it is shown as having a large thickness in the figure, this is done because the layers constituting the laminated sheet are drawn thick so that they can be easily seen with the naked eye.

Since the PE layer 34 and the PE layer 35 are made of the same kind of material, the adhesive strength between them is strong.Therefore, when drinking the contents such as juice covered with this lid, the mouthpiece should be covered. When pinched with a fingertip and pulled, the PE layer 34 is also pulled together and ruptured at the periphery of the drinking mouth, and the opening portion previously opened as the drinking mouth opens.

FIG. 2 illustrates a laminated sheet that serves as a bottom lid.
(Note that it may be used as an upper lid, and in that case, the drinking mouth may be opened by an appropriate means.) This sheet is a heat-sealable PE layer 1, Al layer 4,
A laminated body including an A-PET layer 6, a PE layer 7, and an O-PET layer 3, which is used so as to face the inside of a container body to which the PE layer 1 is applied.

Table 1 shows other examples of sheets used as the lid of the container of the present invention, including those shown in FIGS. 1 and 2 above. In this table, the substance names of the layers constituting the sheet are listed in the order of lamination. The numbers shown next to the substance names are the numbers used in the claims for utility model registration and in the description of the drawings.

The rightmost layer of the laminated sheet shown in Table 1 above is the layer facing the inside of the container body to be covered. The laminated sheet of (a) in the table is shown in FIG. 1, and the laminated sheet of (f) is shown in FIG. The sheets (d), (e) and (f) are obtained by adhering the PE layer to the A-PET layer in the sheets (a), (b) and (c), respectively (claim 2 This is A-
Since the PET layer is relatively expensive, the thickness of the A-PET layer is made somewhat thin, and the PE layer is added to compensate for that. At this time, linear low density polyethylene or low density polyethylene is used as the PE layer.

Next, the thickness of each layer constituting the laminated sheet will be illustrated.

[1] PE layer (1): 40 to 80 μm. When the PE layers are divided into PE layers (1a) and (1b) as shown in FIG. 1, the thickness within the above range may be divided.

[2] Al layer (4): 20 to 50 μm.

[3] O-PET layers (3) and (5): 12 to 25 μm.

[4] A-PET layer (2): 120 to 200 μm.

In addition, like (d), (e), and (f) in Table 1 above,
When the PE layer (7) is added, the A-PET layer has a thickness of 50 to 120 μm, and the adjacent PE layer (7) has a thickness of 80 to 150 μm.

In each case, the unstretched polyester layer [A-
The thickness of the PET layer (2) or (6)] is 3 times or more the thickness of the stretched polyester layer [O-PET layer (3) or (5)].

The laminated sheet described above is molded into a lid having a bent portion as shown in FIGS. 3 and 4 by the same method as that conventionally used, and is filled with juice or the like as shown in FIG. It is used as a lid for a container and is the container of the present invention. In the lid of the container of the present invention, letters, patterns, etc. may be printed on the outer A-PET layer or O-PET layer, or paper or plastic film on which letters, patterns, etc. are printed may be attached. May be.

(Operation) In the laminated sheet constituting the lid of the container of the present invention, the PE layer 1 facing the inside of the container to be covered is for heat sealing to the open end of the container body 20, and the Al layer 4 is It provides a gas barrier property to the lid and helps to preserve the beverage filled in the container. Even if the O-PET layer 3 or 5 is biaxially stretched and has a small thickness, the O-PET layer 3 or 5 has excellent mechanical strength. By using this, the impact resistance strength of the lid is remarkably improved. However, the O-PET layer has poor moldability and is not suitable for making a lid having a bent portion. On the other hand, the A-PET layer has good moldability, but has a drawback that mechanical strength is poor. However, the A-PET layer and O
-When combining PET layers to form a laminated sheet, use O-PET
The physical properties of the layer having poor moldability do not appear in the laminated sheet, and a laminated sheet having excellent moldability and strength can be obtained. In order to bring out this feature, it is necessary to make the thickness of the A-PET layer 3 times or more the thickness of the O-PET layer.

(Effect of the Invention) The lid used in the container of the present invention has a good molding finish even in a shape having a bent portion having a U-shaped cross section, which is necessary when applying the lid, and has excellent mechanical strength. Unlike a conventional lid made of a laminated sheet having a vinyl chloride resin layer, it does not generate a toxic gas such as chlorine gas even after being used and then incinerated, and does not cause a problem of environmental pollution.

[Brief description of drawings]

1 is a schematic vertical sectional front view of an example of a laminated sheet used for the lid of the container of the present invention, FIG. 2 is a schematic vertical sectional front view of another example of the laminated sheet used for a lid of the present invention container, and FIG. 3 is the present invention FIG. 4 is a schematic front view of an example of the lid of the container, FIG. 4 is a schematic plan view of the lid, and FIG. 5 is a schematic vertical sectional front view of an example of the container of the present invention. In the figure, 1 is a polyethylene layer, 2 is a non-stretched polyester layer, 3 is a stretched polyester layer, 4 is an aluminum foil layer, 5 is a stretched polyester layer, 6 is a non-stretched polyester layer, and 7 is a polyethylene layer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minor Okada Minoru Okada 6-26-1, Jingumae Shibuya-ku, Tokyo Kirin Brewery Co., Ltd. (56) References Japanese Patent Publication Sho 63-37701 (JP, B2)

Claims (2)

[Scope of utility model registration request] 1. A container in which an opening of a cylindrical container body (20) is covered with a lid, and the lid body (12) of the lid is heated on the side in contact with the opening of the container body (20). A polyethylene layer (1) having a sealing property, which is a sheet obtained by laminating at least an aluminum foil layer (4), a non-stretched polyester layer and a stretched polyester layer on the polyethylene layer (1) in any order. The aluminum foil layer (4) is not laminated on the outermost side, and the thickness of the non-stretched polyester layer is 3 times or more the thickness of the stretched polyester layer, and the lid body ( A bent portion having a U-shaped cross-section is formed on the peripheral edge portion (13) of the container 12 and the container body (2
A container characterized in that the opening edge of (0) is clamped and sealed. 2. The container according to claim 1, wherein the laminated sheet constituting the lid main body (12) is formed by additionally laminating a polyethylene layer (7) next to the unstretched polyester layer.