JP2003276774A - Easy-to-peel lid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an easy-to-peel lid to be put over a cup container 30 made of an expanded polystyrene or the like for thermally fusion-bonding a periphery 22 of the lid 20, wherein a paper material layer 4 of the lid 20 without an aluminum foil laminated is resistant to an influence of steam generated from hot water and dead foldability is applied to an easy-to-peel layer 6 of the lid 20 by suppressing its properties to restore to an original shape. <P>SOLUTION: The easy-to-peel lid 20 comprises the paper material layer 4, the resin film layer 5 and the easy-to-peel layer 6. One or more strings of linear of perforated cut lines 2, 2, 2, etc., and 3, 3, 3, etc., extending in a direction orthogonal to the direction of opening the lid are provided respectively on the easy-to-peel layer 6 and the paper material layer 4 except the periphery 22 of the lid 20 to be thermally fusion-bonded. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an easy peel (Easy Peel) which heats a peripheral edge portion 22 of a lid member 20 by covering it on a cup container 30 made of expanded polystyrene, such as a cup ramen for pouring hot water for cooking. (Peel; easy to peel off) A lid material which is not laminated with aluminum foil, and which has few problems such as the cup container 30 closing the lid when pouring hot water and it is difficult to pour hot water.

[0002]

2. Description of the Related Art Conventionally, a paper material shown in FIG. 3 which is covered with a styrofoam cup container 30 for cup ramen for boiling hot water to heat a peripheral edge portion 22 of a lid member 20 by heat fusion. In addition to the layer 4, the resin film layer 5, and the easy peel layer 6, an easy peel lid material, which is not shown and is laminated with an aluminum foil of about 7 μm, is widely used. Since the aluminum foil of a certain degree has a property of retaining the given shape as it is (called a dead hold property, hereinafter the same), the paper material layer 4, the resin film layer 5 and the easy peel layer 6 of the lid member 20 are When suppressing the tendency to return to the original shape (called shape memory), peeling the lid member 20 up to near the center and bending it outward, when pouring hot water with the cup container 30 partially opened Cup container 30 problems such as difficult pouring is boiling water and closed was small.

Conventionally, the peripheral edge portion 22 of the lid member 20 is heat-sealed by covering the cup container 30 made of styrofoam such as for cup ramen for pouring hot water for cooking.
Due to reasons such as disposal at the time of disposal and metal detection of foods, Easy Peel lid material without aluminum foil laminated,
It was strongly desired.

That is, for example, as shown in FIG. 3, a paper material layer 4 such as a double-sided art paper or a single-sided art paper, the surface of which is beautifully printed, and a stretched polyester, a stretched nylon, a polyester with a ceramic vapor deposition, or a stretched polypropylene. And the like, resin film layer 5 having excellent strength and various barrier properties, ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer, Ethylene-acrylic acid copolymer,
Ionomer resin, polypropylene, linear low-density polyethylene, methylpentene polymer, polybutene polymer, low-density polyethylene, medium-density polyethylene, high-density polyethylene, etc., have excellent sealing properties and are easily heat-sealed. It is an easy peel lid material having a knob 21 at the peripheral edge, which is formed by laminating a peelable easy peel layer 6 with an adhesive layer (not shown) interposed therebetween.

[0005]

However, the conventional method is to cover the peripheral edge portion 22 of the lid member 20 by heat-sealing it by covering the cup container 30 made of styrofoam, such as for cup ramen for pouring hot water for cooking. As for the easy peel lid member having the tab 21 on the peripheral edge formed by laminating the paper material layer 4, the resin film layer 5 and the easy peel layer 6 shown in FIG. Although the cup container 30 can be easily opened by putting a finger on 21 and pulling it a little, it is an easy-peel lid material that is easy to open, but the lid material 20 is peeled to near the center to the outside. When the hot water is poured into the cup container 30 with the cup container 30 partially opened, it is affected by the steam generated from the hot water and is restored by the increase of its own weight due to the absorption of the steam of the paper material layer 4 of the lid member 20. Force acting on the inner surface of the lid member 20 and the force of the easy peel layer 6 laminated on the inner surface side of the lid member 20 to shrink the lid member 20 and the paper material layer 4 and the resin film layer 5 bent outward. The easy peel layer 6 often returns to its original shape, and there is a problem that the cup container 30 is closed and it is difficult to pour hot water.

Therefore, an object of the present invention is to cover the peripheral portion 22 of the lid member 20 with a cup container 30 made of styrofoam, such as a cup ramen for pouring hot water for cooking, to heat-seal the easy peel lid member. In addition, the paper material layer 4 of the lid member 20 on which the aluminum foil is not laminated is made less susceptible to the steam generated from the hot water, and the original shape of the easy peel layer 6 of the lid member 20 is changed. Lid material 2 that suppresses the tendency to return and gives dead hold to each
Easy peel lid material that peels 0 near the center, folds outward, and pours hot water with the cup container 30 open halfway, making it difficult to pour hot water into the cup container 30. To provide.

[0007]

As shown in FIGS. 1A and 1B, the easy peel lid material of the present invention is formed by laminating a paper material layer 4, a resin film layer 5 and an easy peel layer 6 on the periphery. In the easy peel lid material having the knob 21,
One line or two extending in a direction orthogonal to the opening direction (FIG. 1A, B, right and left direction in FIG. 2, hereinafter the same) on the easy peel layer 6 of the lid member 20 excluding the peripheral edge portion 22 to be heat-sealed. 1 or more rows (6 rows in FIG. 1A, the same below), straight or perforated lines (straight in FIG. 1A, the same below)
It is an easy peel cover material characterized by having 2, 2, ....

In the easy peel lid material of the present invention,
In the above-mentioned conventional easy peel lid material having a knob 21 on the peripheral edge, which is formed by laminating the paper material layer 4, the resin film layer 5, and the easy peel layer 6 shown in FIG. In the easy peel layer 6 of the lid member 20 excluding the peripheral edge portion 22 to be heat-sealed, one or more rows of linear or perforated cut lines 2 extending in a direction orthogonal to the lid opening direction, By providing 2, 2, ..., The easy peel layer 6 of the lid member 20 cut along the straight or perforated cut lines 2, 2, 2 ,.
It is possible to suppress the tendency to return to the original shape and to impart the property of keeping the given shape in the opening direction as it is (dead hold property).
Peel it to near the center, fold it outward, and
When pouring hot water with 0 open halfway, the easy peel layer 6 bent to the outside rarely returns to its original shape, so the cup container 30 is closed and it is difficult to pour hot water. It is possible to provide an easy peel lid material with few problems.

In addition, in the easy peel lid material of the present invention, the above-described straight or perforated cut line 2, is formed in the easy peel layer 6 of the lid material 20 excluding the peripheral edge portion 22 to be heat-sealed. Due to the provision of 2, 2, ..., When the peripheral edge portion 22 of the lid member 20 is heat-sealed when the peripheral edge portion 22 of the lid member 20 is heat-sealed, the cup container 30 is covered with styrofoam such as a cup ramen for pouring hot water for cooking. Since the heat-sealed peripheral edge portion 22 of the easy peel layer 6 having excellent properties is not cut, it is possible to provide an easy peel lid material that does not impair the sealing performance.

In addition, the easy peel lid material of the present invention is
As shown in FIGS. 1A and 1B, one or two or more rows extending in a direction orthogonal to the lid opening direction are formed on the paper material layer 4 in the portion excluding the peripheral edge portion 22 of the lid member 20 that is heat-sealed (see FIG. , B is 7
Row, same below), straight or perforated (Fig. 1A, B
Then, the perforation line, the same applies to the following) 3), 3 ...
It is an easy peel lid material characterized by being provided with.

In the easy peel lid material of the present invention,
One or two or more rows of linear or perforated cut lines 3 extending in the direction orthogonal to the lid opening direction are formed on the paper material layer 4 of the lid material 20 excluding the heat-sealing peripheral edge portion 22, Three, three,
The provision of the ... makes the paper material layer 4 of the lid member 20 cut by the linear or perforated cut lines 3, 3, 3, ..., less susceptible to the steam generated from the hot water. With the easy peel layer 6 described above, it is possible to impart the property of keeping the given shape in the opening direction as it is (dead hold property). When pouring hot water while bending the cup container 30 to the outside with the cup container 30 partially opened, the paper material layer 4 folded to the outside is returned to its original shape by being affected by steam together with the easy peel layer 6. It is possible to provide an easy peel lid material that has less problems such as the cup container 30 closing the lid and making it difficult to pour hot water because of less returning.

In addition, in the easy peel lid material of the present invention, the above-described linear or perforated cut line 3, is formed on the paper material layer 4 in the portion of the lid material 20 excluding the peripheral portion 22 to be heat-sealed. By providing 3, 3, ..., The peripheral edge portion 22 of the lid member 20 is covered by covering the cup container 30 made of styrofoam such as for cup ramen for pouring hot water for cooking.
When the heat-sealing is performed, the lid material 20 is not cut because the heat-sealed peripheral edge portion 22 of the paper material layer 4 to which the most force is applied is not cut together with the above-described easy peel layer 6 (resin film layer 5). Like the easy peel cover material shown in FIG. 3, which does not have the risk of being cut and does not have the above-mentioned conventional cut line, put a finger on the knob 21 of the cover material 20 and slightly strengthen it. It is possible to provide an easy peel lid member that can easily open the cup container 30 by simply pulling the lid.

In addition, as shown in FIG. 1A, the easy peel cover material of the present invention is provided between the paper material layer 4 and the resin film layer 5 or between the resin film layer 5 and the easy peel layer 6 (see FIG. In 1A, between the paper material layer 4 and the resin film layer 5
) Is provided with a light shielding layer 7, which is an easy peel cover material.

In the easy peel cover material of the present invention,
About 80 g / m ² is provided by providing a light-shielding layer 7 made of, for example, white ink and black ink between the paper material layer 4 and the resin film layer 5 or between the resin film layer 5 and the easy peel layer 6. In order to compensate for the insufficient light-shielding property of the following paper material layer 4 and to compensate for the insufficient light-shielding property of the paper material layer 4 due to the provision of the cut lines 3, 3, 3, ..., Cooking is performed by pouring hot water. In order to prevent oxidative deterioration such as oil content of cup ramen, etc., as in the case of the above-mentioned conventional easy peel lid material laminated with about 7 μm aluminum foil (not shown) It is possible to provide a desirable easy peel cover material having a light transmittance of 800 nm of 0.5% or less.

[0015]

1A and 1B are a cross-sectional explanatory view and a plan view of an easy peel cover material according to an embodiment of the present invention. Further, FIG. 2 is a cross-sectional view showing a state in which the easy peel cover material is put on the cup container 30 and heat-sealed in the embodiment of the present invention.

The easy peel cover material of the present embodiment is a stack of a paper material layer 4, a resin film layer 5 and an easy peel layer 6 and has a knob 21 at the peripheral edge. In the portion excluding the peripheral portion 22 to be heat-sealed, from the vicinity of the center to the knob 21, the easy peel layer 6 extends in the direction orthogonal to the opening direction (right and left directions in FIGS. 1A, B, and 2). 6 rows of linear cut lines 2, 2, 2, ... Are provided, and the knob 21 is provided in the vicinity of the center of the lid member 20 excluding the peripheral edge portion 22 to be heat-sealed.
7 rows of perforated cut lines 3, 3, 3, ... That extend in a direction orthogonal to the lid opening direction are provided in the paper material layer 4 extending to the paper material layer 4 and the resin film layer 5 It is an easy peel cover material in which a light shielding layer 7 is provided between and.

In the easy peel lid material of the present embodiment, the easy peel lid material in which the paper material layer 4, the resin film layer 5 and the easy peel layer 6 are laminated is laminated with the above-mentioned conventional aluminum foil. Not done, Figure 3
It is similar to the easy peel lid material formed by laminating the paper material layer 4, the resin film layer 5 and the easy peel layer 6 shown in (4), and beautifully printed on the surface such as double-sided art paper or single-sided art paper. ~ 150 g / m ² of paper material layer 4 and 6 to 25 μm resin film layer 5 of stretched polyester, stretched nylon, polyester with ceramic deposition, stretched polypropylene, etc., which have excellent strength and various barrier properties.
And ethylene-methacrylic acid copolymer (EMAA), ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ionomer resin, polypropylene, straight chain Low density polyethylene, methylpentene polymer, polybutene polymer,
A structure of the cup container 30 which has excellent sealing properties such as low density polyethylene, medium density polyethylene, and high density polyethylene, and can be easily peeled off after heat-sealed to a flange 31 of the cup container 30 described later. Materials (Styrofoam and paper + polyethylene, polypropylene, etc.
1) and an easy peel layer 6 having a thickness of 20 to 80 μm, as shown in FIG.
8 can be laminated without any particular restrictions by a normal dry lamination method and an extrusion lamination method.

In the easy peel lid material of the present embodiment, the linear cut lines 2, 2, 2, ... Provided in the easy peel layer 6 of the lid material 20 are wound film-like resin film layers, respectively. 5 and the easy peel layer 6 are laminated by a normal extrusion lamination method via a heat-melting adhesive layer 8 such as low density polyethylene (LDPE) (if the positional relationship is required, it will be described later. After stacking the paper material layer 4 provided with the perforated cut lines 3, 3, 3, ... And the light-shielding layer 7), a usual metal punching blade device or laser cutting device is used. From the lower surface side of the laminated easy peel layer 6, as shown in FIG. 1A,
The easy peel layer 6 in the portion from the vicinity of the center to the knob 21 in the portion of the lid member 20 excluding the peripheral edge portion 22 to be heat-sealed.
Can be provided with 6 rows of linear cut lines 2, 2, 2, ... That extend in a direction orthogonal to the lid opening direction at intervals of 4 to 8 mm, being careful not to penetrate the resin film layer 5. .

In the easy peel cover material of the present embodiment, straight cut lines 2, 2, 2, ... Do not penetrate the resin film layer 5 from the lower surface side of the laminated easy peel layer 6. By paying attention to
Since the resin film layer 5 excellent in strength and various barrier properties is not cut, the conventional peel line is not provided as described above. Like the easy peel lid material shown in FIG. 3, the moisture resistance and oil resistance are similar. It is possible to maintain good fragrance and aroma retention.

In the easy peel lid material of this embodiment, the perforated cut lines 3, 3, 3, ... Provided in the paper material layer 4 of the lid material 20 are ordinary metal punching blades. Of the roll-shaped paper material layer 4 with beautiful printing on the surface before laminating using a device or a laser cutting device,
Preferably, from the lower layer side, as shown in FIGS. 1A and 1B, the paper material layer 4 in the portion from the vicinity of the center to the knob 21 in the portion excluding the peripheral edge portion 22 of the lid member 20 that is heat-sealed is 4 to 8 mm.
Perforation lines 3, 3, 3, with 7 rows extending in a direction orthogonal to the lid opening direction with a normal cutting rate of about 65%
, ... can be provided leaving the uppermost layer of the paper material layer 4 so as not to impair the display effect.

As shown in FIG. 1A, the light-shielding layer 7 provided between the paper material layer 4 and the resin film layer 5 in the easy-peel lid material of the present embodiment has the perforated cuts described above. 30% or more of 0.5 g / m ² or more of white pigment such as titanium white is provided on the lower surface side (or the upper surface side of the resin film layer 5) of the paper material layer 4 provided with the lines 3, 3, 3, .... White ink containing and black ink containing 10% or more of black pigment such as carbon black by a gravure printing method for a viscous liquid or an ordinary roll coating method,
Black ink / white ink or white ink / black ink /
Like white ink, two or three colors can be printed in layers to form the light-shielding layer 7 between the paper material layer 4 and the resin film layer 5.

Subsequently, after laminating the resin film layer 5 and the easy peel layer 6 described above, the easy peel layer 6 is formed.
, And the resin film layer 5 and the easy peel layer 6 having the straight cut lines 2, 2, 2, ..., And the perforated cut lines 3, 3, 3 ,. The paper material layer 4 and an appropriate adhesive layer 8 such as urethane based
After laminating by a normal dry lamination method, the periphery is appropriately cut and removed with a punching blade or the like, and the easy peel lid material of the present embodiment shown in FIG. As shown in FIG. 2, the flange of the cup container 30 is covered with a cup container 30 such as a conventional styrofoam foam, polyethylene coated cup base paper, or molded polypropylene for cup ramen that is prepared by pouring hot water. When the peripheral edge portion 22 of the lid member 20 is heat-sealed to the lid member 31, the cup container 30 can be easily opened by simply putting a finger on the knob 21 of the lid member 20 and pulling it slightly strongly. Similarly, an easy peel lid material that can be easily opened was obtained.

In the easy peel lid material of the present embodiment, the easy peel layer 6 in the portion from the vicinity of the center to the knob 21 excluding the peripheral edge portion 22 of the lid material 20 which is heat-sealed is opened. , 6 rows of linear cut lines extending in the direction orthogonal to the
Of the perforated cut lines 3 extending in the direction orthogonal to the lid opening direction on the paper material layer 4 in the portion from the vicinity of the center to the knob 21 excluding the peripheral portion 22 to be heat-sealed. Three
, 3, ... By providing the lid member 20, the straight cut lines 2, 2, 2, 2, ... And the perforated cut line 3 in the portion from the center of the lid member 20 bent outward to the knob 21.
It is possible to effectively impart the property (dead hold property) of maintaining the shape given in the opening direction as it is to the easy peel layer 6 and the paper material layer 4 cut by 3, 3, 3. When peeling the lid member 20 to the vicinity of the center and bending it to the outside and pouring hot water with the cup container 30 partially opened, the easy peel layer 6 and the paper material layer 4 are bent to the outside. However, since it rarely returns to its original shape due to the influence of steam, it is possible to obtain an easy-peel lid material that does not have a problem that the cup container 30 is closed and it is difficult to pour hot water.

In addition, in the easy peel cover material of the present embodiment, the light-shielding layer 7 made of white ink and black ink is provided between the paper material layer 4 and the resin film layer 5, so that a break is formed. The light-shielding property of the paper material layer 4 which has become insufficient due to the provision of the lines 3, 3, 3, ... Can be supplemented to prevent oxidative deterioration of oil components such as cup ramen cooked by pouring hot water. We were able to obtain an easy peel lid.

[0025]

As described above, in the easy peel lid material of the present invention, the lid material is covered with the styrofoam cup container 30 for cup ramen for pouring hot water for cooking. A paper material layer 4 of the lid material 20 which is an easy peel lid material for heat-sealing the peripheral edge portion 22 of the aluminum foil 20 and which is not laminated with aluminum foil is made less susceptible to the steam generated from the hot water, and The lid member 2 in which the nature of the easy peel layer 6 of the lid member 20 that tries to return to the original shape is suppressed and a dead hold property is given to each of them.
Easy peel lid material that peels 0 near the center, folds outward, and pours hot water with the cup container 30 open halfway, making it difficult to pour hot water into the cup container 30. Can be provided.

[Brief description of drawings]

1A and 1B are views showing an embodiment of the present invention,
FIG. 3 is a cross-sectional explanatory view and a plan view of the easy peel lid member.

FIG. 2 is a cross-sectional view showing a state in which the easy-peel lid member is placed on the cup container 30 and heat-sealed in the embodiment of the present invention.

FIG. 3 is a cross-sectional explanatory view of a conventional easy peel cover material.

[Explanation of symbols]

2, 3… break line 4 ... Paper material layer 5 ... Resin film layer 6… Easy peel layer 7 ... Shading layer 8 ... Adhesive layer 20… Lid material 21 ... Knob 22 ... Edge 30 ... Cup container 31 ... Flange

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 3E067 AB01 BA07A BB01A BB14A                       CA04 CA12 EE48 FA01                 3E084 AA02 AA12 AA24 AB10 BA07                       BA08 BA09 CA01 CB01 CB03                       CC03 CC07 CC08 FA09 FD13                       GB08 GB12 HA01 HB01 HC08                       HD01 KA14 KA15

Claims (3)

[Claims] 1. An easy-peel lid material having a tab on the peripheral edge formed by laminating a paper material layer, a resin film layer, and an easy-peel layer, the easy-peel portion of the lid material excluding the peripheral edge portion to be heat-sealed. An easy peel lid material, characterized in that one or more rows of linear or perforated cut lines extending in a direction orthogonal to the lid opening direction are provided in the layer. 2. A linear or perforated cut extending in the direction orthogonal to the lid opening direction in one or more rows in the paper material layer excluding the peripheral edge portion of the lid material which is heat-sealed. The easy peel cover material according to claim 1, wherein a line is provided. 3. The easy according to claim 1 or 2, wherein a light-shielding layer is provided between the paper material layer and the resin film layer or between the resin film layer and the easy peel layer. Peel lid material.