JPS5813415B2 - sealed container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a sealed container, and is particularly suitable as a package that is filled with powder, granular materials, fluid food and drink, etc., and that can be easily provided with an opening for taking out the filling when in use. It is something.

BACKGROUND ART Conventionally, a sealed package in which a lid material coated with a heat-sensitive adhesive is adhered to the opening of a container body filled with contents by heat sealing has been used as an individual package for food and drink.

To take out the contents of this package, just pinch and pull the edge of the lid material on the opening edge of the container body.The adhesive strength of the lid material to the container body is weak, so it can be easily peeled off to form an opening. Although there are advantages, there are disadvantages in that the seal portion may peel off due to impact during handling or transportation of the package, causing the contents to flow out, and it is not possible to form an opening in a predetermined shape.

In addition, there are some containers in which the lid material is strongly sealed to the container body and an opening is provided in the lid material.

In this case, the lid material is an aluminum layer on the outside and a polyethylene layer on the inside. A notch is provided at the position where the opening is formed in the aluminum layer, and a peel-off tab made of aluminum sheet is placed on top of that part by pinching the end. By pulling the peel-off tab, the lid material can be cut from the notched portion to form a hole in the lid.

However, this lid material requires the use of an aluminum layer, and since a cut in the aluminum layer is formed in the hole, there is a risk of cutting the lips when drinking a beverage directly.

In addition, when a printed pattern is applied to provide a peel-off tab, the appearance is poor and manufacturing is complicated, resulting in high cost.

The present invention eliminates the drawbacks of the above-mentioned sealed container that is not used as a package, and allows a part of the lid material to be easily peeled off to form an opening, and the container body and the lid material are strongly sealed. The purpose of this invention is to provide an inexpensive sealed container, the gist of which is to provide a synthetic resin layer that can be heat-sealed to the rim of the opening of the container body on one side of the lid base material, which is made of a unidirectionally oriented film that is easy to tear. The lid material is heat-sealed to the opening of the container body, and a cut is made in the lid material over a predetermined width in a direction perpendicular to the direction of orientation of the lid base material. The sealed container is characterized in that a tongue piece is formed, and a backing layer is provided on the inner surface of the lid panel, covering the tongue piece and being glued around the tongue piece.

Next, the sealed container of the present invention will be explained with reference to the drawings.

1 and 2 are a sectional view and a plan view showing an example of a sealed container of the present invention, in which 1 is a container body and 2 is a lid material.

The container body 1 is a cup-shaped container, and the outer layer 11 is made of paperboard, and a heat-fusible film such as polyethylene, ethylene-vinyl acetate copolymer, ionomer resin, polypropylene, or a laminated film of these is vacuum-formed on the inner surface. A water-resistant inner layer 12 is adhered thereto.

The opening edge of this container body 1 is bent outward to form a flange 13.

Further, the lid material 2 has a synthetic resin layer 22 that can be heat-sealed to the flange 3 of the container body 1 on one surface of a lid base material 21 made of a film oriented in one direction so as to be easily torn. be.

The lid base material 21 is a film made of polyethylene, polypropylene, polyethylene terephthalate, polyamide, or the like, oriented in one direction by rolling or uniaxial stretching, and the synthetic resin layer 22 is the inner layer 12 of the container body 1. It is preferably a resin layer of the same type as the inner layer 12 as long as it can be heat-sealed to the inner layer 12.

The lid material 2 is made of, for example, a laminated film of a high-density polyethylene film, which is the lid base material 21, and a low-density polyethylene film, which is a synthetic resin layer.
It can be easily produced by rolling a synthetic resin layer to about 5 to 1/6, extrusion laminating or dry laminating a synthetic resin layer on the lid base material 21 obtained by a rolling method or uniaxial stretching method, or solution coating.

A surface material layer 23 may be provided on the outer surface of the lid base material 21.

The purpose of the surface material layer 23 is to impart printability to the lid base material 21;
It is provided for the purpose of maintaining the strength in the direction perpendicular to the orientation direction of the lid base material 21 and for the purpose of providing a gas barrier note. For example, aluminum foil, cellophane, paper, plastic film, etc. can be used, and it is adhered to the lid base material 21. has been done.

The lid material 2 is placed over the flange 13 of the opening of the container body 1 so that the synthetic resin layer 22 is in contact with the flange 13, and is heat-sealed to the flange 13 for sealing.

The container body 1 is filled with contents A.

A cut 24 is made in the center of the lid material 2.

This cut 24 is made so that a tongue piece 25 is formed by bending over a predetermined width in a direction perpendicular to the orientation direction of the lid base material.

For example, the cuts are U-shaped, ■-shaped, etc.

It is preferable that both ends of the cut 24 are cut in the orientation direction of the lid base material 21 so that the tongue piece 25 is easily torn from both ends when the tongue piece 25 is pinched and pulled.

In addition, a backing layer 26 is provided on the synthetic resin layer 22 that forms the inner surface of the lid material 2.
is applied, and this backing layer 26 covers the tongue piece 25 and is bonded to the synthetic resin layer 22 around it.

The backing layer 26 is preferably made of a film or a laminated film having a surface that can be heat-sealed to the synthetic resin layer 22 because it can be easily bonded to the synthetic resin layer 22. As long as it is adhered to the synthetic resin layer 22, it may be applied only to the tongue piece 25 and its surroundings, or it may be applied to the entire back surface of the lid member 2.

Note that 27 indicates a heat-sealed portion between the backing layer 26 and the synthetic resin layer 22.

To make the lid material 2, a laminated film consisting of a lid base material 21, a synthetic resin layer 22, and a surface material layer 23 is made, and this laminated film is punched into a predetermined shape and a cut 24 is made to form a tongue piece 25. However, a backing layer 26 larger than the tongue piece 25 may be applied and heat-sealed to the synthetic resin layer 22 around the tongue piece 25.

Then, the contents A are extracted from the sealed container formed as described above.
To take it out, it is sufficient to pull up the tongue piece 25 formed by the cut 24, pick it up, and pull it along the orientation direction of the lid base material 21 as shown in FIG.

The lid material 2 is torn along the orientation direction of the lid base material 21 from both ends of the cuts 24 and is peeled off from the backing layer 26 to form the lid material 2.
An opening 3 corresponding to the width of the cut 24 is formed.

In addition, in order to form the opening 3 in this way, the lid base material 21
Has a tensile strength of 2000ky/cz or more and a thickness of 0.02ma
As mentioned above, it is preferably 0.04 to 0.05 na, and the synthetic resin layer 22 preferably has a cohesive force of 1.0 to 1.5 kg/cm and a thickness of 0.02 to 0.03 mm.

Furthermore, if the backing layer 26 is made of a material with greater rigidity than the lid material 2, such as a laminated film of the same resin layer as the synthetic resin layer 22 and a stretched film of polypropylene or polyamide, the internal pressure applied to the backing layer 26 can be reduced. Dispersion and heat fusion part 2
The adhesive strength of 7 can be weakened, making it easier to peel off when tearing the lid 2 to form the opening 3.

Further, the adhesive strength of the heat-sealed portion 27 varies depending on the stiffness of the backing layer 26, but is preferably about 0.3 to 2.0k9/15vn.

Further, it is sufficient that the heat-sealed portion 27 is provided around the tongue piece 25, but if it is shaped to protrude outward around the tongue piece 25 in the tearing direction as shown in FIG. 2, it will easily peel off. It's very desirable.

Further, in the present invention, the container body 1 may be made by vacuum forming a heat-fusible synthetic resin sheet as long as it has an inner surface that can be bonded to the synthetic resin layer 22 of the lid material 2. Outer layer 11 made of paperboard and inner layer 1 made of heat-sealable material shown in Examples
2 is preferable as a sealed container for a disposable package because it can be disposed of by incineration.

The sealed container of the present invention is constructed as described above, and the lid material is made of a unidirectionally oriented, easily tearable film on one side of the lid base material, and a synthetic resin that can be heat-sealed to the brim of the opening of the container body. The lid base material has a tongue piece formed by making a cut across a predetermined width in a direction intersecting the orientation direction, so when sealing the container, the lid material It can be easily sealed by heat-sealing it to the container body, and when opening the sealed container, the lid material can be easily torn off by pulling the tongue piece to form an opening.

Further, a tongue piece is formed by making a cut in the lid material over a predetermined width in a direction intersecting the orientation direction of the lid base material,
A lining layer is provided on the inner surface of the lid that covers the tongue and is glued around it, so while the lining maintains the sealing properties of the lid, the opening can be formed by pinching and pulling the tongue. , an opening corresponding to the width of the tongue piece can be easily formed.

Furthermore, the lid material is simple and inexpensive to manufacture because it is only necessary to cut the laminated film, make cuts, and adhere the backing layer.

[Brief explanation of drawings]

FIGS. 1 and 2 are a sectional view and a plan view showing the closed container of the present invention as viewed from the bottom, and FIG. 3 is a perspective view showing the state in which an opening is formed in the sealed container shown in FIG. 1. 1: Container body, 11: Outer layer, 12: Inner layer, 13: Tsuba, 2
: Lid material, 21: Lid base material, 22: Synthetic resin layer, 23: Surface material layer, 24: Cut, 25: Tongue piece, 26: Backing layer, 27:
Heat fusion part, 3: Opening.

Claims (1)

[Scope of Claims] 1. A lid material that has a synthetic resin layer heat-sealable to the flange of the opening of the container body on one side of the lid base material made of a film oriented in one direction and easily torn. The opening of the lid is heat-sealed and sealed, and the lid material is cut with a bend over a predetermined width in the direction intersecting the orientation direction of the lid base material to form a tongue piece. A sealed container characterized in that it is provided with a backing layer that covers the tongue and is glued around the tongue. 2. The sealed container according to claim 1, wherein both ends of the bent cut face toward the orientation direction of the lid base material to form tongue pieces. 3. The sealed container according to claim 1 or 2, wherein the lid material is made by rolling a laminated film of a film serving as a lid base material and a film serving as a synthetic resin layer with a rolling roll.