JP2001180737A - Lid member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid member formed of a laminate which is free from any environmental problems related to a waste, and detectable by a metal detector, and sufficient in dead holding property and re-sealability. SOLUTION: The lid member 20 to seal an upper end opening part of a container body 10 is formed of a laminate containing no aluminum foils, tabs 22a and 22b are provided at two symmetrical position of the circumferential edge facing each other notches 30a and 30b extending to a center are provided in the direction orthogonal to the extending direction of the tabs 22a and 22b at a base of the tabs, and the laminate of the lid material 20 comprises at least a strongly flexible resin layer as an outermost layer and a sealant layer as an innermost layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a container body having an opening at the upper end and a flange at the periphery of the upper end.
The present invention relates to a lid material mainly made of paper suitable for sealing and sealing the flange portion, and particularly to a lid having a structure not containing aluminum foil constituting a lid material of a container for storing instant noodles and pouring hot water. About materials.

[0002]

2. Description of the Related Art Conventionally, for example, a container for storing instant noodles, instant soup and the like, a container body having an opening at an upper end and a flange at an upper peripheral edge is made of paper for sealing the flange with a seal or the like. As a main cover material, a material in which an aluminum foil and a sealant layer are laminated on the lower surface of a paper layer is known. At the time of this opening, when the lid material sealed to the flange portion is peeled off to a substantially central portion while lifting the tab on the peripheral edge, the lid material having the aluminum foil interposed as described above remains in a state of being peeled off. It has a property that can be maintained (hereinafter referred to as dead hold property). Due to this property, for example, in instant noodles, it is easy to peel off and pour boiling water in a half-open state, then re-seal the noodles to warm and loosen them, replace the lid material, put the tabs in the container It had the property of being wound around the flange of the main body (hereinafter referred to as resealability).

[0003]

However, in the lid material having the aluminum foil interposed therein as described above, in the incineration treatment after use, the aluminum foil is entangled as an ingot in the furnace and damages the incinerator. There was a problem that the incineration efficiency was reduced. In addition, in the landfill disposal of the incinerated ash, there was a problem such as generation of harmful gas due to reaction with rainwater or the like.

[0004] Furthermore, the presence of aluminum foil in the lid material makes it impossible to use a metal detector for inspecting the mixing of metal-based chips and the like in the container containing the contents. It has been desired to enable an inspection method by use.

In order to solve the above-mentioned problems and demands, when a laminated material composed of a paper layer, a sealant layer or the like excluding aluminum foil is used as a lid material, the lid can be easily opened without dead hold property. It was easily closed, making it difficult to pour boiling water, and there was concern that boiling water would spill and burns. In addition, when resealing after pouring hot water, there has been a problem that the lid is curled by heat or the like, and it is difficult to reseal as it is.

The present invention solves the problems and demands of the prior art described above, and has as its object to be concerned with environmental problems related to waste and to inspect products with a metal detector. An object of the present invention is to provide a lid material having a sufficient dead hold property and resealability even in a laminate having a configuration not using an aluminum foil.

[0007]

Means for Solving the Problems In order to achieve the above object in the present invention, first, according to the first aspect of the present invention, there is provided a laminate which does not include an aluminum foil and seals and seals an upper end opening of a container body. And in the lid material having a plurality of tabs on the periphery, the plurality of tabs are provided at two symmetrical positions of the periphery at point-symmetric positions, and at the base of the tab, in a direction orthogonal to the extending direction of the tab. A lid material is provided with a notch notch extending to the center.

According to the first aspect of the present invention, since no aluminum foil is contained, there is no fear of environmental problems relating to waste, and inspection by a metal detector is enabled. At the time of opening, the lid material is peeled off to a substantially central portion while pulling up one of the tabs on the peripheral edge, and is hooked on the notch notch of the other tab to lock, so that the property that the peeled state can be maintained, that is, pseudo It is possible to obtain a cover material having a specific dead-hold property.

In the invention according to claim 2, the laminated body is constituted by at least a strong resin layer as an outermost layer and a sealant layer as an innermost layer. Material.

According to the second aspect of the present invention, by interposing the strong resin layer in the laminate, the lid material is easily returned to the original state, that is, a flat state upon resealing, and the paper layer is strengthened. If it is configured between the waist resin layer and the sealant layer, the curl due to heat etc. will be eliminated, so it will be easy to return to a flat state, and furthermore, the tab can be cut and the notch can be bent inward as a ruled line, and it can be resealed Can be made more reliable.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. As shown in the perspective view of FIG. 1, the present invention provides a lid (20) for sealing the opening of a container body (10) having an opening provided with a flange (12) around the upper end, for example. The cover material (2
No. 0) has two tabs (22) on opposing peripheral edges, and is sealed to the flange portion (12) of the container body (10) by heat sealing or the like.

As shown in the front view of FIG. 2, the cover (20) is provided with two tabs (22a, 22b) symmetrically at opposite positions on the periphery thereof.
A cut notch (30a, 30b) extending to the center in a direction orthogonal to the extending direction of the tab is provided on the base of 2b).

As shown in the side sectional view of FIG. 3, the structure of the lid member (20) is, for example, that the outermost layer is a strong resin layer (3).
2) and the innermost layer is composed of a sealant layer (34), and in the middle is a laminated body in which a printing sheet (36) made of paper or a plastic film is laminated without interposing an aluminum foil.

As shown in FIG. 4, in consideration of the thickness of the outermost strong resin layer (34) and the strength of the print sheet (36), the print sheet (36) and the sealant layer (34) are formed. 3
Between 4), one or two auxiliary resin layers (35) may be interposed.

The strong resin layer (34) constituting the lid material (20) of the present invention is, for example, a polyethylene terephthalate film (PET), polyethylene naphthalate film (PEN), polycarbonate film (PC) having a thickness of about 10 to 50 μm. Is suitable as a film having relatively strong stiffness.

The sealant layer (3) as the innermost layer
4) include linear low-density polyethylene (LLDPE) and low-density polyethylene (LDP) which are excellent in heat sealability.
E), polyolefins such as high-density polyethylene (HDPE) and unstretched polypropylene (CPP) are preferably used, and a mixture of these polyolefin resins, which is made of polystyrene, polybutene, or the like, and is incompatible with the polyolefin resin. You can also. Further, a hot-melt adhesive composed of an ethylene-vinyl acetate copolymer resin, an ethylene-acrylic acid copolymer resin, etc.
シ ー 25 g / m ² , and the sealant layer (34) allows the flange portion (1) of the container body (10) to be provided.
2) and sufficient peelability and peelability can be achieved.

As the printing sheet (36), for example, in the case of paper, it is preferable that at least the surface is white and has multicolor printing aptitude, and the basis weight is 75 g / m ^{2 to} 120 g / g.
Both art papers, single art papers, coated papers and the like of about m ² can be suitably used. In the case of a plastic film, a polyethylene film (PE) having a thickness of about 15 μm, which is printed on the back surface in the order of multicolor printing and white solid (entire white) printing is used.

As shown in FIG. 4, an auxiliary resin layer (3) for improving the interlayer adhesive strength between the sealant layer (34) and the printing sheet (36) and for supplementing the rigidity of the lid material.
5) may be provided in one or two layers, for example, with a thickness of 15
-25 μm polyethylene film, polyethylene terephthalate film, etc.
5) can be laminated by dry lamination or extrusion lamination.

When the lid (20) having the above structure is used for sealing, for example, opening of a container such as instant noodles is performed as follows.
As shown in the perspective view of FIG. 5, one tab (22a) is picked up by a finger and lifted to lift the flange (1) of the container body (10).
This is achieved by peeling the lid member (20) from (2) almost to the center thereof. Further, when the tab (22a) is bent, and the notch (30a) of the tab (22a) is hooked on the notch (30b) of the opposing tab (22b) and locked, the lid member (20) is in a half-open state, so that the pseudo The cover material (20) has a typical dead hold property. That is, it is possible to make it easier to pour hot water from the opening (14) as in the case of the lid material in which the conventional aluminum foil is interposed, and to make it easier to eat and drink in that state. Even when the lid (20) is used for a jelly-like confectionery or yogurt container, the lid (20) can be easily eaten with the lid (20) being opened halfway.

Further, using the lid member (20) having the above-mentioned structure,
For example, when resealing a container such as instant noodles, as shown in the perspective view of FIG. 1, when the lock between the tabs (22a, 22b) is unlocked, the lid member (20) returns to its original state, that is, becomes flat. The tab (22a) can be cut inward and the notch (30a) can be folded inwardly as a ruled line, so that the resealability can be further ensured. In order to warm and loosen the noodles, etc., no weight is placed on the lid. That's it.

[0021]

Next, the present invention will be described in detail with reference to examples. <Example 1> As shown in FIG. 4, a basis weight having a pattern or the like printed on the surface thereof through a dry lamination adhesive on a polyethylene terephthalate film (PET) having a thickness of 12 μm as a strong resin layer (32). A printing sheet (36) is laminated with a piece of art paper of 80 g / m ² , and a polyethylene terephthalate film having a thickness of 12 μm and a polyethylene film (PE) having a thickness of 15 μm are formed on the back surface thereof.
As an auxiliary resin layer (15) comprising a dry lamination adhesive, and a hot melt adhesive: H0 as an innermost sealant layer (34).
91 (manufactured by Toyo Petro Co., Ltd.) at a coating amount of 20 g / m ² to form a laminate. As shown in FIG. 2, tabs (22a, 22b) are provided at two places on the periphery and cut notches (3
0a, 30b) to obtain a circular lid member (20) having a diameter of 100 mm.

<Example 2> As shown in FIG. 3, a 25 μm-thick polyethylene terephthalate film (PET) was used as a strong resin layer (32) through a dry lamination adhesive to print a pattern or the like on the back surface. A 12 μm thick polyethylene film (PE) on which white solid printing is applied is laminated as a printing sheet (36), and a hot-melt adhesive: H091 (manufactured by Toyo Petro Co., Ltd.) as the innermost sealant layer (34) on the back surface ) Is applied at 20 g /
was applied in m ² to form a laminated body, as shown in FIG. 2, tab in two places of the periphery (22a, 22b) and circular lid cut notches (30a, 30b) the diameter 100mm subjected thereunder (20) was obtained.

Comparative Example 1 A polyethylene film (PE) having a thickness of 15 μm and a thickness of 7 μm were formed on the back surface of a piece of art paper having a basis weight of 80 g / m ² having a pattern or the like printed on the front surface thereof through a dry lamination adhesive. Aluminum foil, thickness 15
A polyethylene film having a thickness of μm is sequentially laminated via an adhesive for dry lamination, and the innermost layer is coated with a hot melt adhesive: H091 (manufactured by Toyo Petro Co., Ltd.) in an amount of 20 g.
/ M ² to obtain a laminate having an aluminum foil interposed, thereby obtaining a circular lid material having a diameter of 100 mm and having a tab at one location on the periphery.

Comparative Example 2 A 15 μm-thick polyethylene terephthalate film (PET) was placed on the back of a piece of art paper having a basis weight of 80 g / m ² , on which a pattern or the like was printed, via a dry lamination adhesive. A 15 μm polyethylene film is sequentially laminated via an adhesive for dry lamination, and a hot melt adhesive: H
091 (manufactured by Toyo Petro Co., Ltd.) at a coating amount of 20 g / m ² to form a laminate, with a diameter of 10 having a tab at one location on the periphery.
A 0 mm circular lid material was obtained.

The lids obtained in the above Examples and Comparative Examples were heat-sealed to the flanges of the paper cups, respectively, and sealed to prepare materials for instant noodle cups. Dead-hold property (easiness of pouring hot water) and re-sealing property (easiness of re-sealing of waiting time for warming and softening noodles after pouring hot water) of these materials
Was evaluated by 10 panelists. The results are shown in Table 1.

[0026]

[Table 1]

From the above Table 1, it can be seen that the dead-hold property of Comparative Example 1 in which two tabs and a notch under the tab were provided like the lid materials of Examples 1 and 2 was a conventional aluminum foil interposed. A better evaluation was obtained. In the resealability, the lids of Examples 1 and 2 in which the strong resin layer was applied to the outermost layer were easy to return to flat without curling due to heat. Was slightly lowered because it was difficult to stop the seal on the flange of the cup. However, as in Comparative Example 2, in the case of a cover material in which the paper layer was provided on the outermost layer and the strong resin layer was not interposed, the curl due to heat was large and the resin was resealed. The properties were extremely poor.

[0028]

As described above, the present invention has the following effects. That is, even if the lid is a lid that seals and seals the upper opening of the container main body and does not include the aluminum foil, tabs are provided at two symmetrical points on the periphery, and tab bases are provided. Since the lid material is provided with a notch notch, when opening and pouring hot water, the tab can be hooked and locked by the notch notches, so that a lid material having excellent dead hold properties can be obtained.

Further, the laminated body is provided with at least a strong elastic resin layer as an outermost layer, so that after pouring hot water, the lid material for a waiting time for warming the noodles and the like is softened. In this case, the lid material does not curl due to heat, and the cut notch of the tab can be creased and fixed to the flange portion of the cup, so that a lid material excellent in resealability can be obtained.

Further, since the lid material does not include aluminum foil, the environmental impact of waste can be reduced, and the use of a metal detector for inspecting the presence or absence of metal scraps in the product becomes possible. It can be.

Therefore, according to the present invention, it is possible to maintain the opened state of the lid of containers such as instant noodles and instant soups, as well as jelly-like confectionery and yogurt, even if the lid is opened. Demonstrate practical effects.

[Brief description of the drawings]

FIG. 1 is a perspective view for explaining an embodiment of a container to which a lid material of the present invention is applied.

FIG. 2 is a schematic front view showing an embodiment of a lid member according to the present invention.

FIG. 3 is an explanatory view showing one embodiment of a lid member of the present invention in a side cross section.

FIG. 4 is an explanatory view showing another embodiment of the lid member of the present invention in a side cross section.

FIG. 5 is a perspective view for explaining an example of an opened state and dead hold property of a container to which the lid material of the present invention is applied.

[Explanation of symbols]

 10 container body 12 flange 14 opening 20 lid material 22a, 22b tab 30a, 30b notch notch 32 rigid resin layer 34 sealant layer 35 auxiliary resin Layer 36 ‥‥ printing sheet

Claims (2)

[Claims] 1. An upper end opening of a container body is hermetically sealed.
In a lid member that does not include an aluminum foil and has a plurality of tabs on the periphery, the plurality of tabs are provided at two symmetrical positions on the periphery, and the base of the tab has a tab. A cover member provided with a notch notch extending to a center portion in a direction orthogonal to the extending direction. 2. The lid material according to claim 1, wherein said laminate comprises at least a strong resin layer as an outermost layer and a sealant layer as an innermost layer.