JPH0717554A - Resealable lid material - Google Patents

Abstract

PURPOSE:To provide a container lid material which is used for a circular cup for holding instant food finally prepared by pouring hot water and is capable of retaining the unsealed and resealable conditions of the cup without using plastically deformable aluminum foil and which consists mainly of the paper capable of performing a hot water absorbing function in the case of an instant chow mein. CONSTITUTION:An elliptic lid material 2 having a minor axis mealy equal in length to the outside diameter 3' of a flange part at the opening of a circular cup and a major axis slightly longer than the outside diameter of the flange part consists of a score 5 provided on at least one side in the major axis direction and nearly as arcuate as the outer periphery of the flange part, a flap 4 defined by the score 5 and the side edge of an ellipse into the form of a crescent and the partly cut lines 6 provided at both the ends of the crescent- shaped flap 4. A central partly cut line 8 is provided along the minor axis and one or more weakened parts 9 capable of being torn easily by outside pressure are provided near the edge of the ellipse on the side opposite to the crescent-shaped flap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cup lid material for instant food which is cooked with hot water.

[0002]

2. Description of the Related Art Conventionally, a laminated material composed of paper / aluminum foil / polyethylene / hot melt adhesive layer has been generally used for an instant food container lid material such as cup ramen. Among them, aluminum foil having a thickness of at least 7 μm or more is used, and in addition to the oxygen barrier property, it imparts plastic deformability to the lid member. That is, when pouring boiling water,
The lid can be kept flipped over and can be returned to a state close to that before opening during cooking time. When the aluminum foil becomes thin, the plastic deformability described above is lost, and there are cases where the original state cannot be restored. During the cooking time, the weight is put on the lid and the lid is closed.

[0003]

However, as environmental problems have been highlighted in recent years, the use of aluminum in laminated materials, which are difficult to separate and collect, has become a problem. Therefore, even when considering alternative materials to aluminum, there is no material that has the same plastic deformability as aluminum, and it is difficult to find a material that can easily keep the open state when pouring hot water and the resealed state during cooking. there were. Also, it is awkward to put something on it while cooking. The present invention solves such a problem and can maintain an open state when pouring hot water and a resealing state while cooking without using aluminum at all, and moreover, the hot water poured before eating is easy and safe. The purpose is to provide a lid material that can be poured into

[0004]

In order to solve the above problems, the present inventors have obtained a lid member having the following structure. That is, in an elliptical lid material having a short diameter that is substantially the same length as the outer diameter of the opening flange portion of the circular cup and a long diameter that is slightly longer than the outer diameter of the opening flange portion, at least one end in the long diameter direction has a flange outer circumference and A lid material having resealing property, which is characterized by comprising a substantially arc-shaped cut line, a crescent-shaped flap formed by the cut line and an elliptic edge, and ruled lines provided near both ends of the crescent-shaped flap. Is. A lid material having resealing characteristics is characterized in that a central ruled line is provided along the minor axis. Further, the resealing lid material is characterized in that it has one or a plurality of openings easily opened by external pressure inside the elliptical edge opposite to the crescent-shaped flap. With such a configuration, it is possible to maintain the open state when pouring hot water and the resealing state while cooking without using aluminum foil, and when it is necessary to discard the poured hot water before eating, from the opening It is possible to provide a lid material that can be safely poured out.

[0005]

The lid according to the present invention can maintain the opened state and the re-closed state as in the case of using the aluminum foil. The container with the lid material will be described according to the order of actual use. This lid material has an elliptical shape, and at least one end of the major axis is provided with a crescent-shaped flap formed by a cut line of an arc substantially the same as the outer circumference of the container flange and an elliptic edge, and the flap is provided at both ends of the flap. It is designed to be folded up and down according to the folding rule. First, at the time of opening, remove the lid material by half from the crescent-shaped flap side,
When you fold it up to 80 ° and let go of it, it will stay upright. In this case, when the crescent flap is bent on the outer circumference of the container flange on the side opposite to the opening side in a state of being bent 180 ° along the central ruled line, the lid material is locked by the mechanism described below, and the state of being folded 180 ° is completely completed. Can be kept. After pouring hot water and returning the peeled lid material to the original position before peeling and pushing down the crescent-shaped flap downward, the flap bends from the ruled lines at both ends, and the inner edge of the flap is a container at two points on the left and right. The lid material can be kept in a closed state during cooking time by contacting and locking the outer periphery of the flange. That is, since the lid member once opened has a force to open, the crescent flap also tries to rise due to this force, but the inner edge of the crescent flap is caught on the outer periphery of the flange, and the locking mechanism works. The resealed state can be maintained. In addition, when it is necessary to drain the hot water, a protrusion such as a pair of chopsticks should be placed from the outside on the weakened portion that was previously provided near the inner edge of the flange of the elliptical edge on the side opposite to the opening side of the oval-shaped cover material. You can easily open it by pushing it in and open the opening for hot water draining.

[0006]

The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a perspective view of a lid member according to the present invention, showing an opened state and a resealed state. FIG. 2 shows the layer structure of the lid member. 3 and 4 are a plan view and a side view, respectively, of the lid member according to the present invention. FIG. 5 is a plan view of an application example.
As shown in FIG. 3, the lid member according to the present invention has an elliptical shape having a minor diameter substantially the same as the outer diameter of the opening flange portion 3 of the circular cup and a major diameter slightly longer than the outer diameter of the opening flange portion 3. In the cover material 2 of the above, a cut line 5 having substantially the same circular arc as the flange outer circumference 3'is provided at at least one end in the major axis direction, and a crescent-shaped flap 4 formed by the cut line 5 and the elliptical edge.
And a ruled line 6 provided near both ends of the crescent-shaped flap 4, and further, a central ruled line 8 along the minor axis and an inner side of the elliptical edge on the side opposite to the crescent-shaped flap 4 of the opening. 1 or a plurality of openings 9 that can be easily opened by
Is to have. The lid member 2 has an elliptical shape as shown in FIG. 3, and its minor axis is punched out slightly larger than the circumference 3 ′ of the container flange 3. Further, as an application example of the present invention, as shown in FIG. 5, one may be elliptical and the other may be circular. The locking mechanism for resealing will be further described below with reference to FIGS. When the crescent-shaped flap 4 is folded downward at the ruled lines 6 at both ends thereof, the folded flap 4 '
The inner edge 5'is locked at a point 7 in contact with the outer circumference 3'of the flange 3, so that the lid member can be resealed to the state before opening. In the case of opening the lid material, the flap folded downward in advance is returned horizontally, and the projection side 10 of the lid material 2 is held to peel off to the central ruled line 8.
As indicated by 2 ', if the lid member is bent backward, the lid member is substantially upright due to the plastic deformability, and the opened state can be maintained.
In this case, the lid member 2 is folded back 180 ° and the flap 4 is
By locking the to the outer edge of the flange on the side opposite to the opening side, a stable opened state can be obtained. When hot water is drained, if the fragile portion 9 shown in FIGS. 1 and 3 is pushed in with a protrusion, the perforations of the fragile portion 9 are destroyed, and the hot water can be poured out safely. The perforation shape of the fragile portion 9 may be freely set to an H shape, a semicircular shape, a U shape, or the like. However, it is desirable to be as close as possible to the inner edge of the container flange.

The lid material of the present invention relates to a lid material for a container having the circular opening and the flange 3 shown in FIG. 1, and is not particular about the material of the cup and the lid material. The laminated structure of the lid material according to the present invention is not particularly limited, but as shown in FIG.
2, a paper layer 13, a polyethylene layer 12, an adhesive layer 14 or a printing layer 11, a paper layer 13, a polyethylene layer 12, an adhesive layer 14. That is, the outermost layer of polyethylene may be omitted. White paperboard is 200-2
Although it can be used in the range of 50 g / m ² , it is preferable to use a cup base paper which has a large stiffness, is well bent at the ruled line, and has some return, and is excellent in plastic deformability. The polyethylene layer is used to provide moisture resistance, water resistance, easy peelability and tear resistance when the lid material is peeled off, but low density polyethylene can be provided on both sides or one side of the paper by extrusion coating. Usually, the one already coated is supplied, so this can be used. The adhesive is preferably a hot melt type having a low temperature sealing property. Block polymers such as ethylene vinyl acetate copolymer, styrene isoprene styrene, and styrene butadiene styrene are generally used for hot melt adhesives, but ethylene vinyl acetate copolymer is easy to control for easy peeling and coating. It is preferable in terms of handling such as suitability. The hot melt layer is provided on the polyethylene layer by the gravure coating method. The print layer is provided on the outermost layer by offset or gravure printing.

The gist of the present invention is to provide a lid material mainly made of paper with a plastic deformation function of the lid material using aluminum foil. Generally, paper is a material that is more likely to be plastically deformed than a plastic sheet, but is not as good as a metal foil such as aluminum. Therefore, the ruled lines are used to make plastic deformation close to that of aluminum foil to some extent, and the locking mechanism as described above is provided so that the opened and resealed state of the lid material can be firmly maintained.

[0009]

Example A prototype lid material for a foam polystyrene cup having an outer diameter of a flange of an opening of 102 mm, a bottom diameter of 70 mm and a height of 105 mm was manufactured. A hot-melting agent layer 10 having an opening capacity of 230 g / m ² and coated with 12 μm of polyethylene on one side and further mixed with 40% of ethylene vinyl acetate copolymer, 35% of tackifier, and 25% of wax agent and having an easy opening property.
μm was provided by the gravure coating method. The lid member having the above-described laminated structure has a short diameter and a long diameter of 106 mm and a long diameter of 13 mm, respectively.
It was punched into a 0 mm ellipse. At this time, a central folding line 8, a folding line 6, a score line 5 and a fragile portion 9 due to perforations shown in FIG. 2 were provided at the same time. The lid material thus obtained was heat-sealed on the styrene cup flange using a hot plate. The sealed lid member 2 was peeled off to the central portion with the projecting piece 10, folded 180 ° at the central ruled line 8 and then released and returned to about 90 ° and stopped. Also, 18
When the flap 4 was bent downward in a state of being folded by 0 °, it was locked to the outer edge of the flange on the opposite side, and the open state could be stably maintained. Next, when the lid material panel 2 was returned to the initial position and the flap 4 was bent downward, the lid material panel 2 was hooked to the outer edge of the front flange, locked, returned to the state before unsealing, and could be resealed. When the lid material according to the present invention is actually used, the entire container is overlapped with the shrink film 12, but the crescent-shaped flap 4 is folded into a state as shown in the left side of FIG. The resealable lid material according to the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the gist of the present invention.

[0010]

EFFECTS OF THE INVENTION According to the present invention, it is possible to put into practical use a paper-based lid member that can be held in place at the time of opening and re-sealing without using an energy-consuming aluminum foil. Along with cost reduction, it can be handled as easily incinerated waste after use, and environmental load can be reduced.

[0011]

[Brief description of drawings]

FIG. 1 is a perspective view of a lid member according to the present invention.

FIG. 2 is a layer structure diagram of a lid material according to the present invention.

FIG. 3 is a plan view of a lid member according to the present invention.

FIG. 4 is a side view of a lid material according to the present invention.

[0012]

[Explanation of symbols]

 1 container 2 lid material 3 flange 3'flange outer edge 4 new moon flap 4'folded flap 5 cut line = flap inner edge 5'folded flap inner edge 6 flap folding ruled line 7 flap locking point 8 central ruled line 9 weak Part 10 Protrusion piece 11 Printing layer 12 Polyethylene layer 13 Paperboard layer 14 Adhesive layer

[Procedure amendment]

[Submission date] January 12, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a plan view of an application example.

Claims (3)

[Claims] 1. An elliptical lid member having a minor axis having substantially the same length as the outer diameter of the opening flange portion of the circular cup and a major axis slightly longer than the outer diameter of the opening flange portion, at least at one end in the major axis direction. A resealing characterized in that it comprises a crescent line that is substantially the same as the outer circumference of the flange, and is made up of a crescent-shaped flap formed by the cut line and an elliptical edge, and a ruled line provided near both ends of the crescent-shaped flap. A lid material with properties. 2. The resealing lid material according to claim 1, wherein a central ruled line is provided along the minor axis. 3. The method according to claim 1 or 2, wherein the inside of the elliptical edge opposite to the crescent-shaped flap has one or a plurality of openings that are easily opened by external pressure. Re-sealable lid material.