JP2000327036A - Lid material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the light-shielding property, and facilitate the incineration disposal, and in addition, make a metal detector usable at the time of a quality inspection by forming the light-shielding layer of an aluminum deposited layer and/or a solid ink-printed layer. SOLUTION: In this lid material 1, on the total surface of one surface of a paper layer 2, a solid ink-printed layer 3 which is printed with a printing ink using carbon black is provided. Also, on the top of the printed layer 3, a heat-bondable adhesive layer 5 is provided through an intermediate layer 4 comprising a low density polyethylene. In this case, the solid ink-printed layer 3 is a layer which is provided in order to impart light-shielding property. By this constitution, the lid material 1 can be easily incinerate-disposed, and also, is excellent in light-shielding property the same as a lid material for which an aluminum foil is used. In addition, a quality inspection using a metal detector, which has been impossible for a conventional lid material using an aluminum foil, can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover material used for a container for storing instant foods and the like.

[0002]

2. Description of the Related Art Conventional instant food noodles, for example, instant noodles containing instant noodles, are picked up by picking a tab formed on the periphery of the lid when eating, and turned up. About half of the container is peeled to provide an opening, and the ingredients and the like in the container are taken out of the packaging bag and put into the container again. Thereafter, a required amount of hot water is poured into the container from the opening. Then, cover the peeled lid material again, bend the knob tab and lock it at the opening end of the container, return it to hot water for a predetermined time, then wind up the lid material completely to expose the container opening, and pepper if desired. I was eating with spices such as

[0003] Such a container for ready-to-eat food or the like is composed of a cup-shaped container main body and a lid material that is thermally bonded to such a container main body. For example, polystyrene paper,
High-impact polystyrene sheets, polypropylene sheets, laminated sheets of polyamide and polyethylene or polypropylene, laminated sheets of polyethylene and polypropylene, etc., are formed into containers using well-known vacuum forming methods or pressure forming methods, such as polypropylene and polystyrene. Known containers, such as a container obtained by injection molding a resin for injection molding, a container made of expanded styrene, a container made of paper, and a double container composed of these are used.

[0004] In addition, as a material to be provided as a lid material, a laminate using an aluminum foil in a layer structure, for example, paper is used as a base layer, and an adhesive layer is formed on one surface of the base layer. A laminate having a configuration in which an aluminum foil layer is provided through the substrate and a heat-adhesive resin layer is further provided on the surface of the aluminum foil layer is used. The reason for using aluminum foil in the layer configuration is that aluminum foil has plastic deformability,
As described above, it is possible to attach a bending habit for locking to the opening end of the container to the picking protruding piece, to be able to temporarily hold the lid material over the opening, and to be able to temporarily cover the lid material. Can be corrected to a flat state by correcting the curl even if it curls, and that the quality of the content can be maintained for a certain period of time due to the light shielding property of the aluminum foil.

[0005] On the other hand, the above-mentioned lid material using an aluminum foil in the layer structure has a problem that it is difficult to incinerate when discarded, and an aluminum material that cannot use a metal detector in quality inspection. There is a problem due to the use of foil.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and has as its object to provide a light shielding property of a lid material using an aluminum foil in a layer structure. On the other hand, on the other hand, it is an object of the present invention to provide a cover material that can be incinerated and that can use a metal detector for quality inspection.

[0007]

Means for Solving the Problems In order to achieve the above object, the present inventors have set forth a cover material according to the first aspect of the present invention, which comprises at least a paper layer, a light-shielding layer, and a heat-adhesive adhesive layer. In the lid material provided, the light-shielding layer is a deposited layer of aluminum and / or a printed layer of solid black. By configuring in this way, it is excellent in light shielding properties, easy incineration disposal, and at the time of quality inspection,
The cover material can be a metal detector.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Specific embodiments of the present invention will be described below in more detail with reference to the drawings.
FIG. 1 is a schematic perspective view showing an embodiment of a container for ready-to-eat food or the like according to the present invention, FIG.
Is the first lid material used for containers for instant foods and the like according to the present invention.
FIG. 4 is a layer configuration diagram showing a second embodiment of a lid material used for a container for an instant food or the like according to the present invention, and FIG. 5 is a diagram showing a layer configuration for a container for an instant food or the like according to the present invention. FIG. 6 is a layer configuration diagram showing a third embodiment of a lid material used, FIG. 6 is a layer configuration diagram showing a fourth embodiment of a lid material used for a container for instant food or the like according to the present invention, and FIG. FIG. 8 is a layer configuration diagram showing a fifth embodiment of a lid material used for a container for ready-to-eat foods and the like.
Is the sixth member of the lid material used for the container for ready-to-eat foods and the like according to the present invention.
Is a layer configuration diagram showing the embodiment of FIG.
1 ″, 11, 11 ′, 11 ″ are lid materials, 2 is a paper layer, 3 is a solid black printing layer, 4 is an intermediate layer, 5 is a thermo-adhesive adhesive layer, 6 is an aluminum deposited layer, 7 Is an adhesive layer, 8 is a synthetic resin sheet,
Reference numeral 33 denotes a white solid printed layer, 50 denotes a container, 51 denotes a container body, 52 denotes a flange portion, and 53 denotes a tab.

FIG. 1 is a schematic perspective view showing an embodiment of a container for instant foods and the like according to the present invention.
A container body 51 having a substantially inverted trapezoidal cross section having a circular opening on one side and a lid member 1 having substantially the same outer shape as the opening of the container body 51 are provided at an opening edge of the container body 51. The lid 52 has a configuration in which the flange 52 and the lid 1 are sealed with a heat-bondable portion (not shown) which can be peeled off. Are formed.

[0010] The container 50 usually contains seasoned fried noodles.
Pick up 53 with your fingers and roll it up.
The pouring port A is provided as shown in FIG. 2 by peeling off the lid material 1 to a degree, and the ingredients and the like in the container 50 are taken out from the pouring port A, taken out of the packaging bag and returned into the container 50 again. ,
A required amount of hot water is poured into the inside from the pouring port A, and the peeled portion of the lid material 1 is covered again on the container main body 51 (a state as shown in FIG. 1). After the hot water is removed), the lid 1 is entirely rolled up from the container body 51 to expose the container opening and eat.

FIG. 3 is a layer configuration diagram showing a first embodiment of a lid material used for a container for instant food or the like according to the present invention.
Is provided with a solid black printing layer 3 printed on the entire surface of one side of the paper layer 2 with a printing ink using carbon black, and thermally bonded on the printing layer 3 through an intermediate layer 4 made of low-density polyethylene. It has a configuration in which the adhesive layer 5 is provided. The paper layer 2 is a layer that forms the base material layer of the lid 1,
Usually, a picture layer is provided on the exposed surface of the paper layer 2. The black solid printing layer 3 is a layer provided for providing light-shielding properties, and the intermediate layer 4 made of low-density polyethylene is
When the cover 1 is thermally bonded to the lid 51, the flange 52
Is a layer provided so as to absorb slight irregularities normally present in the substrate and to be thermally bonded to the container body 51.
Is a layer provided for securely bonding the lid 1 to the container body 51 by heat.

FIG. 4 is a layer configuration diagram showing a second embodiment of a lid material used for a container for ready-to-eat foods and the like according to the present invention, wherein a lid material 1 ′ is made of carbon black on one entire surface of a paper layer 2. A black solid printing layer 3 printed with the used printing ink is provided, and a solid white printing layer 33 printed with the printing ink using titanium oxide is provided on the entire surface of the printing layer 3. It has a configuration in which a heat-adhesive adhesive layer 5 is provided on an intermediate layer 4 made of low-density polyethylene.
The white solid print layer 33 can be seen directly when an operation such as peeling the lid 1 ′ from the container body 51 and providing a pouring hole is performed when eating instant cup noodles. Is not preferable as a packaging material for food, and is provided for camouflaging it.
33 can also be expected to have an effect of blocking ultraviolet rays by titanium oxide. Other layers are the same as in the first embodiment, and a description thereof will be omitted.

FIG. 5 is a layer configuration diagram showing a third embodiment of a lid material used for a container for ready-to-eat food or the like according to the present invention. And a solid black print layer 33 printed with titanium oxide print ink is provided on the entire surface of the print layer 3, and the print layer 3 is provided with a black solid print layer 33. 33, a synthetic resin sheet layer 8 is provided via an adhesive layer 7, and a heat-adhesive adhesive layer 5 is provided on the entire surface of the synthetic resin sheet layer 8. The adhesive layer 7 is a layer provided for bonding the solid white print layer 33 and the synthetic resin sheet, and may be a layer made of low-density polyethylene extruded by a T-die extruder, or a well-known dry layer. It may be a layer made of a lamination adhesive.
When the adhesive layer 7 is formed of low-density polyethylene extruded by a T-die extruder, a solid white print layer 33 such as an anchor coat agent is provided between the solid white print layer 33 and the adhesive layer 7. A treatment for improving the adhesive strength between the adhesive and the adhesive layer 7 may be performed. The same applies to the space between the solid black print layer 3 and the intermediate layer 4 of the first embodiment and the space between the solid white print layer 33 and the intermediate layer 4 of the second embodiment. The synthetic resin sheet 8 is provided to give rigidity and elasticity to the lid 1 ″, so that the lid is hard to be broken, and the knob projection 53 of the lid 1 ″ is manually pressed. Picking container 50
After the lid 1 ″ is peeled off, a pouring port A is provided. After pouring the required amount of hot water, the knob 53 is released and the pouring port A is automatically opened due to the elasticity of the lid 1 ″. This is to close and prevent heat from escaping. This synthetic resin sheet 8 is
As long as the cover member 1 can be provided with rigidity and elasticity, it may be biaxially or uniaxially stretched, or may be unstretched.
It may be appropriately determined according to the required physical properties. Further, when synthetic paper is used for the synthetic resin sheet 8, the solid white print layer 33 is not intentionally provided. Also, when at least one layer of the synthetic resin sheet 8 and the adhesive layer 7 is colored, for example, colored white using titanium oxide, the solid white printed layer 33 is not intentionally provided similarly to the above. This can be applied to the intermediate layer 4 of the second embodiment.

As described above, the lids 1, 1 ', and 1''of the present invention shown in the first to third embodiments are easy to incinerate, and the conventional lids made of aluminum foil are used. As well as excellent light-shielding properties, it is possible to perform quality inspection using a metal detector, which was impossible with a conventional lid member using aluminum foil.

FIG. 6 is a diagram showing the layer structure of a fourth embodiment of a lid material used for a container for ready-to-eat foods and the like according to the present invention. The lid material 11 is replaced with a solid black print layer 3 of the first embodiment. The first embodiment is the same as the first embodiment except that the aluminum vapor deposition layer 6 is provided. Therefore, in this case, the aluminum vapor deposition layer 6 is different from the solid black print layer 3 of the first embodiment. Similarly, it is a layer provided for imparting light shielding properties.

FIGS. 7 and 8 are layered views of fifth and sixth embodiments of lids used for containers for ready-to-eat foods and the like according to the present invention. The third embodiment is the same as the second and third embodiments except that an aluminum vapor deposition layer 6 is provided in place of the solid black print layer 3, and the description is omitted. Note that the fifth and sixth
In the embodiment of the present invention, the solid white print layer 33 is provided,
This is because, when eating instant cup noodles, when the lid material is peeled off from the container body 51 and a pouring port is provided, the metallic luster of the aluminum vapor-deposited layer 6 can be seen directly, and the consumer can use the aluminum foil. The purpose of this is to eliminate the possibility of disposal processing like the lid material used, and if there is no such a concern, the solid white print layer 33 need not be provided.

Also, in the case of using the synthetic resin sheet 8 as the cover material of the fifth and sixth embodiments, as in the case of the cover material of the second and third embodiments, a white solid Printing layer
There is no need to set 33. In addition, at least one layer of the synthetic resin sheet 8 and the adhesive layer 7 is colored, for example,
Also in the case of coloring white using titanium oxide, the white solid printing layer 33 is not intentionally provided similarly to the above.

As described above, the lids 11, 11 'and 11''of the present invention shown in the fourth to sixth embodiments can be easily incinerated similarly to the first to third embodiments. Also, as well as the conventional lid material using aluminum foil, it has excellent light shielding properties, and the quality inspection using a metal detector, which was impossible with the conventional lid material using aluminum foil, Although it is necessary to lower the sensitivity, quality inspection by a metal detector can be made possible.

In the lid materials of the first to sixth embodiments, beautiful printing is usually performed on the exposed surface of the lid material.
In the case where blackening due to the black solid printing layer 3 or the aluminum deposited layer 6 provided in the layer structure on the exposed surface side through the paper layer 2 appears and causes a problem in design, the exposed surface of the paper layer 2 And / or a solid white print layer may be provided between the paper layer 2 and the solid black print layer 3 or the aluminum vapor deposition layer 6 to enhance the design.

Next, a description will be given of the heat-adhesive adhesive layer 5 provided on the cover material used for the container for ready-to-eat foods and the like according to the present invention. The heat-adhesive adhesive layer 5 needs to be appropriately selected from those which can be easily opened in accordance with the configuration of the container body 51 which is thermally bonded to the lid member. Examples include well-known food containers that are used as ready-to-eat food containers, such as polystyrene paper, high-impact polystyrene sheets, polypropylene sheets, laminated sheets of polyamide and polyethylene or polypropylene, and laminated sheets of polyethylene and polypropylene. A container formed by molding a sheet or the like by a known vacuum forming method or a pressure forming method, a container formed by injection molding a resin for injection molding such as polypropylene or polystyrene, or a container made of expanded styrene or a paper container Or a double container composed of these.

Examples of the resin that can form the heat-adhesive adhesive layer 5 that can be easily opened with respect to the container body 51 include polyethylene, polypropylene, ethylene-propylene copolymer, and ethylene-vinyl acetate. Polymer, chlorinated polyethylene, chlorinated polypropylene, ionomer resin, vinyl chloride-vinyl acetate copolymer, acrylic resin, methacrylic resin, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, ethylene-acryl A simple substance or a composite such as an acid ester copolymer, an ethylene-methacrylic acid ester copolymer, and a polyester resin can be exemplified. In addition, the thermal adhesive layer 5
The coating method may be determined in consideration of the resin system to be used and the coating amount of the heat-adhesive adhesive layer 5. For example, a hot-melted resin is extruded from a T-die extruder. It can also be formed by making the resin into a solution (including emulsification), applying it by a known coating method such as roll coating or gravure coating, and drying it. The heat-adhesive adhesive layer 5 may also be colored white with, for example, titanium oxide or the like to eliminate the above-mentioned problems caused by the solid black print layer 3 and the aluminum vapor deposition layer 6.

[0022]

Next, the present invention will be described in more detail with reference to the following examples. Example 1 White solid printing was performed on one surface of a double-sided coated paper having a basis weight of 79.1 g / m ² using a gravure plate (plate depth: 40 μm) with white ink using titanium oxide. Picture printing was performed on the top. Then, on the other side of the double-side coated paper, using a gravure plate (plate depth: 35 μm), black solid printing is performed with black ink using carbon black, and a gravure plate (plate depth: 40 μm), and a white solid print was printed twice with a white ink using titanium oxide. Thereafter, a urethane-based anchor coating agent was applied to the entire surface of the white solid printing surface printed twice, and 20 μm of low-density polyethylene was applied to the surface of the anchor coating agent application using a T-die extruder.
m, extruded and then coated with a polyolefin-based polymer alloy on the low-density polyethylene coated surface using a T-die extruder.
Extrusion coating was performed at 25 μm to form a heat-adhesive adhesive layer, and a lid material of the present invention was obtained.

Example 2 A biaxially stretched polyethylene terephthalate film of 12 μm having a basis weight of 79.1 g / m ² and having a vapor-deposited aluminum layer on one side and a corona discharge treatment on the other side was used. Hereinafter, a vapor-deposited surface of aluminum-deposited PET) is connected to a well-known urethane dry lamination adhesive (3).
g / m ² dry) to produce a laminate, and after printing a pattern and an OP varnish (overcoat varnish) on both sides of the laminate, a corona discharge treatment of aluminum-deposited PET is performed. An EMAA-based heat sealant (Chuo Rika Kogyo Co., Ltd., Aquatex AC-C9854) was dry-coated at 5 g / m ² by a known roll coating method to form a heat-adhesive adhesive layer on the PET surface. A lid material was obtained.

With respect to the lid material of the present invention obtained in Examples 1 and 2, the transmittance of light in the wavelength region of 200 to 700 nm was measured with a spectrophotometer, and the results are summarized in Table 1. Also, it exhibited a good light-shielding property with a transmittance of 0.3% or less, and there was no practical problem in the content resistance as compared with the lid material using the conventional aluminum foil.

[0025]

[0026]

As described above, the lid material of the present invention is a lid material used for a container in which ready-to-eat foods and the like are stored, is easily incinerated, and uses aluminum foil. As well as the conventional lid material, it has excellent light-shielding properties, and has the effect of enabling quality inspection using a metal detector, which was not possible with the conventional lid material using aluminum foil. is there.

[Brief description of the drawings]

FIG. 1 is a schematic perspective view showing one embodiment of a container for ready-to-eat food or the like according to the present invention.

FIG. 2 is an explanatory diagram showing a use state of FIG. 1;

FIG. 3 is a layer configuration diagram showing a first embodiment of a lid material used for a container for instant food or the like according to the present invention.

FIG. 4 is a layer configuration diagram showing a second embodiment of a lid material used for a container for instant food or the like according to the present invention.

FIG. 5 is a layer configuration diagram showing a third embodiment of a lid material used for a container for instant food or the like according to the present invention.

FIG. 6 is a layer configuration diagram showing a fourth embodiment of a lid material used for a container for instant food or the like according to the present invention.

FIG. 7 is a layer configuration diagram showing a fifth embodiment of a lid material used for a container for instant food or the like according to the present invention.

FIG. 8 is a layer configuration diagram showing a sixth embodiment of a lid material used for a container for instant food or the like according to the present invention.

[Explanation of symbols]

1, 1 ', 1 ", 11, 11', 11" Lid material 2 Paper layer 3 Printing layer of solid black 4 Intermediate layer 5 Thermal adhesive adhesive layer 6 Aluminum vapor deposition layer 7 Adhesive layer 8 Synthetic resin sheet 33 Solid white printing layer 50 Container 51 Container main body 52 Flange 53 Knob projection

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Osamu Takeatsu, Inventor 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. No. 1-1, Dai Nippon Printing Co., Ltd. F term (reference) 3E067 AB01 BA07A BB01A BB12A BB25A BB30A BC03A CA12 EA06 EA36 EA37 FA01 FC01 GD10

Claims (1)

[Claims] 1. A cover material having at least a paper layer, a light-shielding layer, and a heat-adhesive adhesive layer, wherein the light-shielding layer is an aluminum vapor deposition layer and / or a solid black print layer. And lid material.