JPH0891437A - Cup-shaped container with easy removal of the lid material - Google Patents

Abstract

(57) [Summary] [Purpose] Heat-bonding strength between the flange part (21) of the cup-shaped container (20) and the heat-bonding layer (31) of the lid material (30), such as jam, yogurt, and water yokan. Provided is a cup-shaped container in which the lid is stable and the lid material can be easily peeled off. [Structure] The present invention relates to a cup made of plastic, paper laminated material, metal or the like, in which the upper opening has a circular shape, an elliptical shape, or a rectangular shape with rounded corners, and a flange portion (21) is provided around the upper opening. The upper surface of the flange portion (21) of the tubular container (20) is laminated with a heat-sealing layer (31) having an appropriate releasability on the lower surface side, and heat-sealing of a lid member (30) made of a laminated resin film or the like. In the cup-shaped container (20) in which the lower surface of the layer (31) is heat-sealed and sealed, the depth is 1 / the thickness of the heat-sealing layer (31) on the upper surface of the flange portion (21).
Two or more annular convex grooves provided with one or more annular concave grooves (11, ...) Of about 2 and having a height of about 1/2 of the thickness of the heat-sealing layer (31). It is a cup-shaped container provided with (12, 12, ...) And from which the lid material can be easily peeled off.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to heat fusion between a flange portion (21) of a cup-shaped container (20) and a heat-sealing layer (31) of a lid material (30) such as jam, yogurt, and water yokan. The present invention relates to a cup-shaped container that has stable adhesion strength and is easy to peel off the lid material.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 2, such as jam, yogurt, and water yokan, the upper opening has a circular shape, an elliptical shape, or a rectangular shape with rounded corners.
(21) A cup-shaped container made of plastic, paper laminated material, metal, etc. (2
On the upper surface of the flange portion (21) of (0), a heat-sealing layer (31) having a proper peelability is laminated on the lower surface side, a heat-sealing layer (31) of a lid material (30) such as a laminated resin film. The lower surface of () is a cup-shaped container (20) such as a cup-shaped or tray-shaped container that is heat-sealed and sealed after containing the contents, and a cut line (1) provided at one end of the flange portion (21). (Not shown) or a lid (30) with various shapes that allows you to easily peel off the lid (30) and open the cup-shaped container (20) by pulling on the knob (b) provided on one end of the lid (30). A cup-shaped container (commonly referred to as an easy peel cup) in which materials can be easily peeled off is widely used.

Further, conventionally, in a cup-shaped container in which these lid materials can be easily peeled off, the upper surface of the flange portion (21) and the lower surface of the heat-sealing layer (31) are securely heat-sealed to hermetically seal them. Therefore, as shown in FIG. 2, the flange portion (21) of the cup-shaped container (20) has an annular groove (211) having a depth equal to or larger than the thickness of the lid member (30).
A cup-shaped container provided with an annular protrusion (212, 212) whose height is equal to or larger than the thickness of the lid material (30) and which allows easy peeling of the lid material in various shapes is often used. .

[0004]

However, the above-mentioned conventional cup-shaped container shown in FIG. 2 in which the lid member can be easily peeled off is provided on the flange portion (21) of the cup-shaped container (20).
Using a thermocompression die that matches the shape of the annular concave groove (211) and the annular convex (212, 212), ensure that the upper surface of the flange portion (21) and the lower surface of the heat-sealing layer (31) are Although it can be heat-sealed and sealed, the temperature of the thermocompression die must be raised and the crimping force must be strongly controlled during the mechanical filling work in which the contents are stored and heat-sealed. If the temperature of the thermocompression-bonding die is too high, or if the pressure-bonding force of the thermocompression-bonding die is too strong, the heat-sealing layer (31) is extruded in the left-right direction, (3
As the thickness of 1) becomes thin, the state in which the heat fusion strength between the upper surface of the flange portion (21) and the lower surface of the heat fusion layer (31) is reduced is a problem that often occurs, and the distribution The lid material (30) may peel off due to handling or shock at the time of sale, and the cup-shaped container (20)
Was likely to be opened.

[0005]

In order to solve the above problems, according to the present invention, as shown in FIG. 1, the upper opening has a circular shape, an elliptical shape, or a rectangular shape with rounded corners. Flange portion (2) of a cup-shaped container (20) made of plastic, paper laminated material, metal, etc. that has a flange portion (21) on the periphery.
On the upper surface of (1), the heat fusion layer (3
A cup-shaped container in which the lower surface of the heat-sealing layer (31) of a lid member (30) made of a laminated resin film or the like, in which 1) is laminated, is heat-sealed and sealed.
In (20), one or more annular concave grooves (11, ...) With a depth of about 1/2 of the thickness of the heat-sealing layer (31) are provided on the upper surface of the flange portion (21). Due to the fact that the height is the heat fusion layer
Approximately 1/2 the thickness of (31), two or more annular convex ridges (12,1
2, ...), the flange portion of the cup-shaped container (20) does not have a state in which the heat fusion strength between the upper surface of the flange portion (21) and the lower surface of the heat fusion layer (31) does not decrease. (21) and lid (3
It is intended to provide a cup-shaped container in which the heat-sealing strength with the heat-sealing layer (31) of (0) is stable and the lid material can be easily peeled off.

[0006]

In the cup-shaped container according to the present invention in which the lid material can be easily peeled, the conventional cup-shaped container in which the lid material can be easily peeled as shown in FIG. On the upper surface of the flange part (21) of (20), the depth of the heat fusion layer (3
One or more annular concave grooves (11, ...) About 1/2 the thickness of 1)
By providing two or more annular protrusions (12, 12, ...) With a height of about 1/2 of the thickness of the heat-sealing layer (31), the contents When the temperature of the thermocompression-bonding die is too high, or when the thermocompression-bonding die's crimping force is too strong during the mechanical filling work of accommodating and heat-sealing. However, when the heat-sealing layer (31) is extruded in the left-right direction, one or more annular concave grooves (11, ...) Or two or more annular convex grooves (12,12, ...) In the middle, 1 of the thickness of the heat sealing layer (31)
The heat-sealing layer (31) of about / 2 remains, and the state in which the heat-sealing strength between the upper surface of the flange portion (21) and the lower surface of the heat-sealing layer (31) is not reduced does not occur. The lid (30) peels off due to handling or shock during distribution and sale, and the cup-shaped container (20)
The flange of the cup-shaped container (20) that does not open
(EN) A cup-shaped container in which the heat sealing strength between the heat sealing layer (31) of the lid (30) and the lid (30) is stable and the lid can be easily peeled off is obtained.

[0007]

FIG. 1 is a perspective view (a) and a partial cross-sectional view of a cup-shaped container in which a lid member can be easily peeled off in an embodiment of the present invention.
It is (b). That is,

In the embodiment of the present invention, the cup-shaped container (20) made of plastic, paper laminated material or metal shown in FIG. 1 (a) is the same as the conventional one, for example, polyethylene or polypropylene. And plastics such as polyvinyl chloride, laminated plastics of these with other synthetic resins and aluminum foil, and paper laminated materials of these with paper materials and aluminum foil, and metals such as aluminum. Cup-shaped container (20) provided with a flange part (21) around the upper opening, which is formed into a cup shape or a tray shape and has a circular or elliptical shape or a rectangular shape with rounded corners. Can be used without particular restrictions.

In the embodiment of the present invention, the heat-sealing layer (31) shown in FIG. 1 (b), which has an appropriate peeling property, is the same as the conventional one, and the flange portion () of the cup-shaped container (20) ( When the lower surface of the heat-sealing layer (31) is heat-sealed and sealed on the upper surface of 21),
Suitable for the material of the cup-shaped container (20) described above, which has an appropriate releasability of 150 to 600 g / 15 mm width, and has a thickness of 20 to 60 μm, such as ethylene-vinyl acetate copolymer, polypropylene or polyethylene. Select the heat fusion layer (31), on the lower surface side of the lid material (30) such as laminated resin film,
It can be appropriately laminated and used.

In the embodiment of the present invention, the cup-shaped container (2
1) provided on the upper surface of the flange portion (21) of (0) shown in FIG.
About the above annular recessed grooves (11, ...), the width is 1.2-2.4 mm and the depth is heat-melted in the molding die such as injection molding, vacuum, pressure molding, flange molding and impact molding. One or two annular concave grooves (11, ...) About one-half the thickness of the adhesive layer (31) (however, in the molding die, an annular convex portion) is provided to form the cup shape described above. It can be easily provided at the same time when the container (20) is molded.

Further, in the embodiment of the present invention, two or more annular projections (12, 12, 12) shown in FIG. 1 (b) provided on the upper surface of the flange portion (21) of the cup-shaped container (20). ...), the middle of the two annular protrusions (12, 12) is one annular groove.
(11, ...) Corresponding to (11, ...)
Similar to (11, ...), the spacing is 1.2 for molding dies such as injection molding, vacuum, pressure molding, flange molding and impact molding.
~ 2.4mm and the height is about 1/2 of the thickness of the heat-sealing layer (31),
Two to three annular convex ridges (12, 12, ...) (However, an annular concave groove portion in the molding die) is provided so that the cup-shaped container (20) described above can be easily provided at the same time. It can be done.

[0012]

As described above, in the cup-shaped container of the present invention in which the lid material can be easily peeled off, the depth of the cup-shaped container (20) on the upper surface of the flange portion (21) is reduced. One or more annular grooves having a thickness of about 1/2 of the thickness of the heat-sealing layer (31)
Due to the provision of (11, ...), the height of the heat fusion layer (3
2 or more annular convex ridges (12, 12,
...), the heat-sealing layer (31) is extruded in the left-right direction during the mechanical filling work for accommodating the contents, heat-sealing the same, and sealing the heat-sealing layer. Groove (11,…)
Or in the middle of two or more annular convex ridges (12, 12, ...), a heat-sealing layer (31) having a thickness of about 1/2 of the thickness of the heat-sealing layer (31) remains,
The state in which the heat fusion strength between the upper surface of the flange portion (21) and the lower surface of the heat fusion layer (31) does not decrease, the flange portion (21) of the cup-shaped container (20) and the lid material (30) It is possible to provide a cup-shaped container in which the heat-sealing strength with the heat-sealing layer (31) is stable and the lid member can be easily peeled off.

[Brief description of drawings]

FIG. 1 is a perspective view (a) and a partial cross-sectional view (b) of a cup-shaped container in which a lid member can be easily peeled off in an embodiment of the present invention.

FIG. 2 is a perspective view of a conventional cup-shaped container in which a lid member can be easily peeled off.

[Explanation of symbols]

 11, 211 ... annular recessed groove 12, 212 ... annular convex ridge 20 ... cup-shaped container 21 ... flange portion 30 ... lid material 31 ... heat-sealing layer a ... cut line b ... knob

Claims (2)

[Claims] 1. A flange portion (21) is provided around the upper opening, the upper opening having a circular shape, an elliptical shape, or a rectangular shape with rounded corners.
Laminated resin in which a heat-sealing layer (31) having appropriate peelability is laminated on the lower surface side of the upper surface of the flange portion (21) of the cup-shaped container (20) made of plastic, paper laminated material, metal, etc. In the cup-shaped container (20) in which the lower surface of the heat-sealing layer (31) of the lid member (30) made of film or the like is heat-sealed and sealed, this flange portion
A lid member characterized in that one or more annular concave grooves (11, ...) Having a depth of about 1/2 of the thickness of the heat-sealing layer (31) are provided on the upper surface of (21). A cup-shaped container that can be easily peeled off. 2. In place of the one or more annular concave grooves (11, ...), two or more annular grooves having a height of about 1/2 of the thickness of the heat-sealing layer (31). The cup-shaped container according to claim 1, wherein the lid member is easily peeled off, provided with protrusions (12, 12, ...).