JP2021102473A - Lid material with peeling part - Google Patents

Abstract

To provide a lid material with a peeling part, which can drain hot water rapidly and/or stably, when the material includes a thin piece-like dried food such as a dried seaweed in particular.SOLUTION: In the lid material with a peeling part according to the present invention, an outer layer has an outer layer half-cut line 130 and a peeling scheduled part, and an inner layer has a plurality of first half-cut lines 112 and a plurality of second half-cut lines 114. The first half-cut lines have an oval shape, and the second half-cut lines have a U-slit shape. The plurality of first half-cut lines 112 form a plurality of first openings in which water-drainage time per one opening is 30 seconds or less, and the plurality of second half-cut lines 114 form a plurality of second openings in which water-drainage time per one opening is 70 seconds or more.SELECTED DRAWING: Figure 2

Description

The present invention relates to a lid material with a peeling portion.

Conventionally, for instant fried noodles in cups and raw noodles in cups, boiling water is poured into the container, the noodles and drying ingredients are rehydrated for a predetermined time, the hot water is discarded, and the sauce is drained. It is designed to be mixed with the seasonings of. Therefore, the lid material that closes the upper opening of the container that houses the noodles and the desiccant material is formed with a hot water drain hole for discharging hot water. The teacup holes formed in the lid material have been devised in various ways because it is necessary to discharge only the hot water safely and in a short time while holding the noodles and the desiccant in the container.

In Patent Document 1, it is a lid material that closes the upper opening in the container, and a detachable piece is formed so as to be detachable at least in a part near the peripheral edge of the lid material body, and the detached piece is separated from the lid material body. It has a structure in which a plurality of hot water drain holes appear by desorption, and the hot water drain holes are formed by vertically arranging two types of long holes having different opening widths, and of the two types of long holes, the opening width. A lid material with a hot water drain hole is disclosed, wherein the narrow long hole is arranged on the hot water drain side of the long hole with a wide opening width.

In Patent Document 2, the outer peripheral surface of the bottomed container body having an opening on the upper surface has substantially the same outer shape as the opening which is heat-bonded and sealed by a peripheral heat-bonding portion so as to be peelable. In a sheet-shaped lid having a hot water discharge port forming picking projectile and an opening / pouring port forming picking projectile at opposite positions on the peripheral edge, the front base material and the back base material of the sheet-shaped lid body are adhered to each other. The layers between the front base material and the back base material are laminated through the layers, and between the peeled region composed of the net-spot separation type layer located on the side of the picking protrusion for forming the hot water outlet, and the non-peeled region adjacent to the peeled region. It is divided into two areas, and a part of the cut line for peeling is provided from the back base material to the front base material on the inner surface side of the picking protrusion for forming the hot water outlet in the peeling area, and also for opening from the cut line for peeling. Opening and pouring port forming knob for forming a hot water outlet in the peeling area on the spout side A plurality of rows are provided in a horizontal row or in a staggered pattern at regular intervals in a direction orthogonal to the straight line connecting the hot water outlet forming picking projectile and the opening / pouring port forming picking projectile. A sheet-shaped lid characterized by being present is disclosed.

Japanese Unexamined Patent Publication No. 2011-46385 Japanese Unexamined Patent Publication No. 2004-276998

In particular, in instant noodles containing dried flaky foods such as dried seaweed, when the lid materials of Patent Documents 1 and 2 are used, the hot water is clogged with the hot water drainage holes due to the dried flaky foods whose volume has increased due to hot water reconstitution or water reconstitution. Due to the inhibition of cutting, the hot water draining time may become long and / or the hot water draining time may vary.

Therefore, there is a need to provide a lid with a peeling portion that can provide a quick and / or stable drainage, especially when containing dried flaky foods such as dried seaweed.

As a result of diligent studies, the present inventors have found that the above problems can be solved by the following means, and have completed the present invention. That is, the present invention is as follows:
<Aspect 1> A lid material with a peeling portion, which is composed of a laminated body having an outer layer and an inner layer, and a part of the outer layer can be peeled from the inner layer.
The outer layer has an outer layer half-cut line, and a planned peeling portion defined by the outer layer half-cut line and the outer circumference of the lid material.
The inner layer has a plurality of inner layer half-cut lines for forming openings at positions corresponding to the planned peeling portions.
The plurality of inner layer half-cut lines for forming openings have a plurality of first half-cut lines and a plurality of second half-cut lines.
The first half-cut line is present in the first region and has an oval shape.
The second half-cut line exists in the second region and has a U-shaped slit shape.
The first region and the second region are separated from each other, and the second region exists on the outer peripheral side of the first region, and the first and second regions are present. However, there is one for each,
The plurality of first half cut lines form a plurality of first openings having a drainage time of 30 seconds or less per opening defined as follows, and the plurality of second halves. A lid with peeling part, in which the cut line forms a plurality of second openings with a drainage time of 70 seconds or more per opening defined as follows:
The lid material having one opening formed is arranged on the upper surface of a polypropylene tubular body having a truncated cone-like outer shape having a height of 118 mm, an inner diameter of 102 mm on the upper surface, and an inner diameter of 74 mm on the bottom surface so that the opening is arranged in the center. When the tubular body is inverted so that the opening faces downward, 300 ml of water is put in from the bottom surface side, and the water is discharged from the opening, from the time when the water is put in, The time until the water discharge from the opening becomes discontinuous is measured, and this time is defined as the drainage time per opening.
<Aspect 2> The lid material with a peeling portion according to Aspect 1, wherein the line connecting both ends of the second half-cut line exists substantially perpendicular to the direction in which the outer layer is peeled.
<Aspect 3> A container having a storage portion and a flange portion,
The contents contained in the container and the lid material with a peeling portion according to the first or second aspect, which is heat-sealed at the flange portion of the container and thereby seals the container. , Container with lid containing contents.
<Aspect 4> The container with a lid containing the contents according to the third aspect, wherein the contents are instant noodles containing a dried flaky food.
<Aspect 5> The container with a lid containing the contents according to Aspect 3 or 4, wherein the second half-cut line of the lid material exists in the vicinity of the flange portion of the container.

According to the present invention, it is possible to provide a lid material with a peeling portion capable of providing a quick and / or stable drainage of hot water, particularly when a dry flaky food such as dried seaweed is contained.

FIG. 1 is a top view of the lid material with a peeling portion of the present invention. FIG. 2 is an enlarged view of FIG. FIG. 3 is a side sectional view taken along line III-III of FIG. 2, showing the mechanism of peeling of the outer layer of the lid material with a peeling portion of the present invention. FIG. 4 is a top view of an embodiment of the lid material with a peeling portion of the present invention. FIG. 5 is an explanatory diagram of the method for measuring the drainage time in the present invention. FIG. 6 is a diagram showing the arrangement and shape of the half-cut lines of the lid material with a peeling portion in Examples and Comparative Examples.

《Cover material with peeling part》
As shown in FIGS. 1 to 3, the lid material with a peeling portion of the present invention is composed of a laminated body having an outer layer 102 and an inner layer 106, and a part of the outer layer 102 can be peeled from the inner layer 106. It is a lid material with a peeling part,
The outer layer 102 has an outer layer half-cut line 130, and a planned peeling portion 132 defined by the outer periphery of the outer layer half-cut line 130 and the lid material 100.
The inner layer has a plurality of inner layer half-cut lines 112 and 114 for forming openings at positions corresponding to the planned peeling portions 132.
The plurality of opening forming inner layer half-cut lines have a plurality of first half-cut lines 112 and a plurality of second half-cut lines 114.
The first half-cut line 112 is present in the first region A and has an oval shape.
The second half-cut line exists in the second region B and has a U-slit shape.
The first region A and the second region B are separated from each other, the second region B exists on the outer peripheral side of the first region A, and the first and second regions are present. , Each one exists,
A plurality of first half-cut lines 112 form a plurality of first openings having a drainage time of 30 seconds or less per opening defined as follows, and a second half-cut line 114. However, a plurality of second openings having a drainage time of 70 seconds or more per opening defined as described below are formed.

The drainage time per opening is defined as follows, as shown in FIG.
The lid material having one opening formed is arranged so that the opening 320 is arranged in the center on the upper surface of the polypropylene tubular body 300 having a truncated cone-like outer shape having a height of 118 mm, an upper surface inner diameter of 102 mm, and a bottom inner diameter of 74 mm. When the tubular body 300 is inverted so that the opening 320 faces downward, 300 ml of water is put in from the bottom side, and water is discharged from the opening 320, the opening 320 is started from the time when the water is put in. The time until the water discharge from the water becomes discontinuous is measured, and this time is defined as the drainage time per opening.

Here, "so that the opening is arranged in the central portion" means that the opening includes the center of the circle forming the upper surface.

According to the above-described configuration of the present invention, it is possible to provide a quick and / or stable drainage of hot water, especially when a dry flaky food such as dried seaweed is contained. I do not want to be bound by theory, but this is because the coexistence of the first half-cut line and the second half-cut line causes a change in the flow of hot water when draining. As a result, it is considered that the dried flaky food is less likely to be clogged with the second opening formed by at least the second half-cut line.

As shown in FIGS. 2 and 3, the lid material 100 may have an inner layer half-cut line 120 for a peeling trigger that triggers the peeling of the outer layer. Further, as shown in FIGS. 1 to 3, this lid material may have a peeling tab 140 and an opening tab 150.

In particular, as shown in FIG. 2, in a mode in which the first half-cut line 112 is formed in a closed diagram shape and the second half-cut line 114 is formed in a slit shape, FIG. 3 (a). When the peeling tab 140 of the lid material shown in () is picked up and pulled up, the inner layer 106 and the optional easily peelable layer 104 remain on the container 200 side, while the outer layer 102 is separated from the easily peelable layer 104. When the peeling is further advanced, the inner layer 106 and the optional easily peelable layer 104 are separated following the outer layer 102 in the region where the opening-forming half-cut line 112 is formed, while being formed in a slit shape. In the portion where the second half-cut line is formed, only the outer layer 102 is separated, and as shown in FIG. 3 (b), the first opening 112a and the second opening 114a are formed. To.

The first half-cut line 112 and the second half-cut line 114 are the first region A in which the plurality of first half-cut lines 112 are present, and the plurality of second half-cut lines 114, as shown in FIG. A second region B in which the half cut line 114 is present exists in the lid material with a peeling portion, and the first region A and the second region B are separated from each other. According to this, the variation in the drainage time can be suppressed. Here, the first and second regions may be regions of planned peeling portions separated from each other by a linear or curved boundary line, and this boundary line is substantially relative to the direction in which the outer layer is peeled off. It may be formed vertically. For example, when the lid material has a peeling tab on the outer peripheral side of the planned peeling portion, this boundary line may be formed substantially perpendicular to the direction from the peeling tab toward the center of the lid material. Alternatively, when the lid material has an inner layer half-cut line for the peeling trigger, this boundary line may be formed substantially parallel to the inner layer half-cut line for the peeling trigger.

Here, in the present specification, "substantially vertical" means that the error of the angle with respect to the perfect vertical is within 10 °, within 5 °, within 3 °, or within 1 °, and is "abbreviated." "Parallel" means that the angle error with respect to perfect parallelism is within 10 °, within 5 °, within 3 °, or within 1 °.

As shown in FIG. 2, the first region A is not divided by the second region B, and the second region B exists on the outer peripheral side of the first region A. According to this, the variation in drainage time can be suppressed. Here, each of the first region A and the second region B exists one by one.

Further, the lid material with a peeling portion of the present invention may have the form shown in FIG.

Hereinafter, the configuration of the lid material with a peeling portion in the surface direction of the present invention will be described.

<Half cut line>
A half-cut line is a notch formed from the surface of the lid material to a depth less than the thickness of the lid material.

The half-cut line can be engraved by, for example, a rotary die cutter, laser light irradiation, or the like. Further, the half cut line can be formed on the inner layer side and / or the outer layer side of the lid material.

For example, the inner layer half-cut line is carved from the surface of the inner layer of the lid material to a depth penetrating the inner layer.

The inner layer half-cut line is carved at a depth penetrating the inner layer in the thickness direction of the inner layer of the lid material. Therefore, the depth of the inner layer half-cut line is approximately equal to the thickness of the inner layer of the lid material.

For example, when an easily peelable layer is arranged between the outer layer and the inner layer of the lid material and the outer layer is peeled off at the interface between the inner layer and the easily peelable layer, the inner layer half-cut line is changed from the surface of the inner layer to the easily peelable layer. It can be formed to a depth that can be reached. Further, when the outer layer is peeled off at the interface between the outer layer and the easily peelable layer, the inner layer half-cut line can be formed to a depth penetrating the easily peelable layer from the surface of the inner layer.

For example, when the release varnish layer is partially arranged between the outer layer and the inner layer of the lid material, the inner layer half-cut line can be formed to a depth reaching the release varnish layer from the surface of the inner layer.

<Inner layer half-cut line for opening>
The inner layer half-cut line for forming an opening has a plurality of first half-cut lines and a plurality of second half-cut lines.

(First half-cut line and first opening)
The first half-cut line is a half-cut line that forms a plurality of first openings having a drainage time of 30 seconds or less per opening. The first half-cut line is a half-cut line that exists in the first region and has an oval shape.

The shape of each first half-cut line may be the same or different.

The drainage time of each first opening may be 30 seconds or less, or 29 seconds or less, and may be 10 seconds or more, 13 seconds or more, or 15 seconds or more.

The area of each first opening may be 100 mm ² or less, 95 mm ² or less, 90 mm ² or less, 85 mm ² or less, or 80 mm ² or less, and 30 mm ² or more, 33 mm ² or more, 35 mm ² or more, or 38 mm. It may be ^{2 or more.}

Since the shape of each first opening is oval, it is possible to achieve both rapid drainage and suppression of the outflow of the contents, and it is possible to make the planned peeling portion follow the outer layer side well. The oval shape means a shape in which both sides are parallel and both ends are arcuate.

The length of the first opening in the short side direction is preferably 4.0 mm or less, 3.5 mm or less, or 3.2 mm or less from the viewpoint of suppressing the outflow of the contents, and is 2.0 mm or more and 2 It is preferably 5.5 mm or more, or 2.8 mm or more, from the viewpoint of providing rapid hot water drainage.

The length of the first opening in the long side direction is preferably 35 mm or less, 33 mm or less, 30 mm or less, or 27 mm or less from the viewpoint of suppressing the outflow of the contents, and is 8 mm or more, 10 mm or more, or 12 mm or more. Is preferable from the viewpoint of providing rapid hot water drainage.

It is preferable that the long side direction of the first opening is substantially perpendicular to the peeling direction of the outer layer from the viewpoint of smoothly forming the opening when the outer layer is peeled. In particular, when the lid material with a peeling portion of the present invention has an inner layer half-cut line for a peeling trigger, the long side direction of the first opening may be substantially parallel to the inner layer half-cut line for the peeling trigger. , It is preferable from the viewpoint of smoothly forming an opening when the outer layer is peeled off.

The total area of the first opening occupies 70% or more, 75% or more, 80% or more, 85% or more, or 90% or more of the total area of the openings formed by all the inner layer half-cut lines for opening. And can account for 95% or less, or 92% or less.

(Second half-cut line and second opening)
The second half-cut line is a half-cut line that forms a plurality of second openings having a drainage time of 70 seconds or more per opening. The second half-cut line is a half-cut line that exists in the second region and has a U-shaped slit shape.

By forming the second half-cut line in a U-shaped slit shape, the portion surrounded by the second half-cut line and the line connecting both ends of the second half-cut line is the second half-cut line. By bending the line connecting both ends as a crease, an opening in this enclosed portion can be formed. The shape of each second half-cut line may be the same or different.

It is preferable that the line connecting both ends of the second half-cut line exists substantially perpendicular to the direction in which the outer layer is peeled off, from the viewpoint of suppressing variation in drainage time. In this case, it is preferable that the line connecting both ends of the second half-cut line exists on the outer peripheral side of the curved portion of the second half-cut line from the viewpoint of suppressing breakage of the lid material at the time of opening. ..

The drainage time of each second opening may be 70 seconds or more, 72 seconds or more, or 75 seconds or more, and 100 seconds or less, 95 seconds or less, 90 seconds or less, 85 seconds or less, or 80 seconds or less. It may be there.

The area of each second opening may be 20 mm ² or less, 18 mm ² or less, 15 mm ² or less, or 13 mm ² or less, and 5 mm ² or more, 7 mm ² or more, 9 mm ² or more, or 10 mm ² or more. You can.

The length of the long side of each second opening is preferably 7 mm or less, 6 mm or less, 5 mm or less, or 4 mm or less, preferably 2 mm or more, or 3 mm or more from the viewpoint of suppressing the outflow of the contents. This is preferable from the viewpoint of securing the amount of drainage.

<Outer layer half cut line>
The outer layer half-cut line is a half-cut line carved from the outer layer side. In particular, in the present invention, the outer layer half-cut line is a half-cut line for defining the planned peeling portion.

<Inner layer half-cut line for peeling trigger>
The inner layer half-cut line for a peeling trigger is an inner layer half-cut line that triggers the peeling of the outer layer from the inner layer.

As shown in FIG. 2, the inner layer half-cut line 120 for the peeling trigger is formed so as to be in contact with the outer periphery of the flange portion 202 of the container when the lid material is adhered to the container. It is preferable from the viewpoint of ease of use. Further, it is preferable that a plurality of inner layer half-cut lines for peeling triggers are formed substantially in parallel from the viewpoint of increasing the allowable range of deviation of the formation position of the inner layer half-cut lines for peeling triggers.

<Main body part>
The main body portion is a portion of the lid material with a peeling portion of the present invention excluding the peeling tab and the opening tab. In particular, the main body portion can be a portion that occupies within the outer circumference of the flange portion of the container when joined to the container, that is, a portion having a shape corresponding to the shape of the outer circumference of the flange portion of the container to be sealed.

The shape of the main body portion may be, for example, a polygon such as a square or a rectangle, a rounded polygon such as a rounded square or a rounded rectangle, a circle, or an ellipse.

<Peeling tab>
The peeling tab protrudes from the main body. The boundary between the main body portion and the peeling tab may be defined by an inner layer half-cut line for a peeling trigger. By picking this peeling tab and pulling it in the peeling direction from the peeling tab toward the main body portion, it is possible to peel between the easily peelable layer and the inner layer, or between the outer layer and the easily peelable layer. ..

<Opening tab>
The optional opening tab is an element for facilitating picking at least a part of the lid material in order to peel off the inner layer bonded to the container from the container, and like the peeling tab, the main body portion of the lid material. It protrudes from the periphery. The opening tab may be composed of an inner layer or a laminate of inner and outer layers.

Subsequently, the layer structure of the lid material will be described below.

<Outer layer>
The outer layer of the lid material may be the outermost layer of the container with a lid when the lid material is joined to the container. Further, the outer layer can be laminated on the inner layer of the lid material and then peeled off from the inner layer.

For example, the outer layer becomes the outermost layer when it is made into a container with a lid by being laminated on the inner layer. Further, for example, the outer layer can be peeled from the inner layer by picking the peeling tab and pulling up the peeling tab.

The outer layer may have a single-layer structure or a multi-layer structure in which a plurality of layers are laminated.

As the outer layer, a single layer of a paper layer, a resin layer, a metal foil layer, a laminate thereof, or the like can be used.

As the paper layer, coated paper, art paper, or the like may be used. Further, the paper layer may be printed by gravure printing, flexographic printing, or the like.

As the resin layer, for example, a thermoplastic resin such as a polyolefin resin, a vinyl polymer, a polyester, or a polyamide can be used alone or in combination of two or more in a plurality of layers. Such a thermoplastic resin can be used in the form of a film or an extruded resin. Further, the film may be a stretched film or a non-stretched film.

As the polyolefin-based resin, for example, a polyethylene-based resin or a polypropylene-based resin can be used.

In the present specification, the polyethylene-based resin is a resin containing a repeating unit of an ethylene group in the main chain of a polymer in an amount of more than 50 mol%, 60 mol% or more, 70 mol% or more, or 80 mol% or more, for example, low density. Polyethylene (LDPE), Linear Low Density Polyethylene (LLDPE), Medium Density Polyethylene (MDPE), High Density Polyethylene (HDPE), Ethylene-Acrylic Acid Copolymer (EAA), Ethylene-Methylacrylate Copolymer (EMAA) , Ethylene-ethyl acrylate copolymer (EEA), ethylene-methyl acrylate copolymer (EMA), derivatives thereof, and mixtures thereof.

In the present specification, the polypropylene-based resin is a resin containing a repeating unit of a propylene group in the main chain of a polymer in an amount of more than 50 mol%, 60 mol% or more, 70 mol% or more, or 80 mol% or more, for example, polypropylene (PP). Examples include homopolymers, random polypropylene (random PP), block polypropylene (block PP), chlorinated polypropylene, acid-modified polypropylene, derivatives thereof, and mixtures thereof.

Examples of the vinyl polymer include polyvinyl chloride (PVC) and the like.

Examples of the polyester include polyethylene terephthalate (PET) and polybutylene terephthalate.

Examples of the polyamide include nylon such as nylon (registered trademark) 6 and nylon MXD6.

Further, the resin layer may include other layers such as an inorganic vapor-deposited layer, a barrier coat layer, and an adhesive layer. As the inorganic material vapor deposition layer, for example, a silica vapor deposition film, an aluminum vapor deposition film, an alumina vapor deposition film, a silica / alumina vapor deposition film, or the like can be used. As the barrier coat layer, for example, a vinylidene chloride coat layer, a polyvinylidene fluoride coat layer, or the like can be used.

As the metal foil layer, for example, a single metal foil such as an aluminum foil, a copper foil, or a titanium foil, or an alloy foil such as an aluminum alloy foil or a stainless steel foil can be used.

<Inner layer>
The inner layer of the lid material is a layer that can be the innermost layer when the lid material is joined to the container.

Further, the inner layer is laminated with the outer layer of the lid material, and then the outer layer can be peeled off. Further, the inner layer can accept the blade for forming the half-cut line so that the half-cut line penetrates the entire inner layer in the stacking direction of the outer layer and the inner layer.

The inner layer may have a single-layer structure or a multi-layer structure in which a plurality of layers are laminated. The inner layer can be, for example, a laminate of a base material layer and a sealant layer.

As the base material layer, for example, the resin layer mentioned for the outer layer can be used.

Further, the inner layer may include a resin layer, an adhesive layer, a metal foil layer, an inorganic vapor-deposited film layer and the like other than the above. Further, the inner layer may include a print layer. These films can be corona-treated for the purpose of improving adhesiveness by modifying the surface or roughening the surface.

The inner layer may have a sealant layer on the side that becomes the innermost layer of the lid material. The sealant layer is a layer for heat-sealing the container to be sealed with the lid material and the lid material. The material of the sealant layer is selected depending on the material of the container to be sealed, and may be, for example, a polyolefin resin. These resins can be given, for example, in the form of stretched or unstretched films, molten resins for extrusion lamination, paints for hot melts, and the like.

Particularly preferable are an interfacial peeling type sealant in which resins having different compositions are mixed, a coagulation peeling type sealant in which the sealant layer is made into a multi-layer and the film is peeled off with cohesive destruction at the time of opening, or a coagulation peeling type sealant is made into a multi-layer. At least one layer is a layer to be fused with the container (seal layer), and the other layer is a layer adjacent to the seal layer (release layer). At the time of opening, the layer between the seal layer and the release layer An easy peel sealant with easy peeling properties, such as a delamination type sealant that can be peeled off with.

The thickness of the inner layer can be, for example, 150 μm or less, 100 μm or less, 80 μm or less, or 60 μm or less, and can be 20 μm or more, 30 μm, or 40 μm or more.

<Easy peelable layer>
The easily peelable layer is an optional layer provided between the outer layer and the inner layer so that the outer layer and the inner layer can be peeled from each other.

The easily peelable layer may be an easily peelable resin layer, a layer formed by applying a peeling varnish or the like to a portion where the outer layer and the inner layer are peeled off, or a layer in which these are combined.

The easily peelable resin used for the easily peelable resin layer is preferably a resin in which a cyclic olefin copolymer (COC) is mixed with a polyolefin resin in a predetermined ratio.

Among the polyolefin-based resins, it is preferable to use a polyethylene-based resin, particularly low-density polyethylene (LDPE). Examples of LDPE include the product name "Petrosen" manufactured by Tosoh Corporation and the product name "Suntech" manufactured by Asahi Kasei Chemicals Co., Ltd.

The MFR (Melt Flow Rate) of the polyolefin resin conforms to JIS K7210 and is 0.01 g / 10 minutes or more and 0.1 g / 10 minutes or more when measured under the conditions of a temperature of 190 ° C. and a load of 2.16 kg. , 1.0 g / 10 minutes or more, and 60 g / 10 minutes or less, 20 g / 10 minutes or less, or 10 g / 10 minutes or less.

The density of the polyolefin resin may be 0.89 g / cm ³ or more, and this density ^{may be 0.94 g / cm 3} or less.

Cyclic olefin copolymer (COC) is a so-called Ziegler catalyst, metallocene, in which α-olefin and cyclic olefin are mixed in a hydrocarbon-based solvent such as hexane, heptane, octane, cyclohexane, benzene, toluene, and xylene. A copolymer that can be obtained by blending a catalyst such as a catalyst. Examples of such a copolymer include the trade name "Apel" manufactured by Mitsui Chemicals, Inc.

The MFR of COC conforms to JIS K7210, and when measured under the condition of temperature 190 ° C./load 2.16 kg, 0.1 g / 10 minutes or more, 1.0 g / 10 minutes or more, or 2.0 g / 10 The MFR may be 40 g / 10 minutes or less, 20 g / 10 minutes or less, or 10 g / 10 minutes or less at a temperature of 190 ° C.

The interfacial peel strength of the easily peelable resin layer can be adjusted by changing the mixing ratio of LDPE and COC. The content of COC in the easily peelable resin may be 1% by mass or more or 3% by mass or more, and this content may be 24% by mass or less or 10% by mass or less. Within such a range, the COC content is preferable because the interfacial peeling between the inner layer or the outer layer and the easily peelable resin layer becomes easy, and the peeling strength of both becomes easy to control.

The thickness of the easily peelable resin layer may be, for example, 10 μm or more or 15 μm or more, and 40 μm or less, 30 μm or less, or 25 μm or less in order to achieve both adhesiveness and peelability with the peelable layer. It's okay.

The easily peelable layer is a nitrocellulose resin, an acrylic resin, a urethane resin, an aminoalkyd resin, a polyamide resin, a polyester resin, or a mixture thereof, or a water-based varnish, an oil-based varnish, an ultraviolet curable varnish, or the like. It may be.

The peeling varnish is more preferably a mixture of an easily peelable resin and wax. The content of the wax in the mixture may be 20% by mass or more and 85% by mass or less based on the mass of the mixture. In such a range, picking of another layer adjacent to the peeling varnish layer can be prevented, and delamination of the peeling varnish layer can be prevented, which is preferable.

<Lamination of layers>
The layers can be laminated by, for example, extrusion laminating such as sand laminating or back laminating, dry laminating, or the like.

In particular, the inner layer and the outer layer can be laminated via the easily peelable layer. More specifically, when the easily peelable layer is an easily peelable resin layer or a combination thereof and a peeling varnish, the inner layer and the outer layer are laminated via the easily peelable resin layer, such as sand laminate. This can be done by laminating means. When the easily peelable layer is a peeling varnish, an adhesive layer may be further laminated between the inner layer and the outer layer. As the adhesive layer, for example, a dry laminate adhesive can be used.

《Container with lid containing contents》
Containers with storage and flanges,
It comprises the contents contained in the container and the above-mentioned lid material with a peeling portion which is heat-sealed at the flange portion of the container and thereby seals the container.

In the container with a lid containing the contents of the present invention, the second half-cut line of the lid material exists near the flange portion of the container, that is, the point closest to the flange portion of each second half-cut line. However, the presence in the region within 5 mm, 4 mm, 3 mm, 2 mm, or 1 mm from the inner circumference of the flange makes it difficult for the dried flaky food to block the second opening when the hot water is drained. As a result, it is preferable from the viewpoint of providing a stable drainage from the second opening.

<container>
The container is a container having a storage portion and a flange portion.

(Storage part)
The storage part is a part where the contents are stored. The shape of this portion can be, for example, a substantially conical trapezoid, a polygonal pyramid trapezoid, a rectangular parallelepiped shape, a cube shape, or the like.

(Flange part)
The flange portion is a peripheral portion of the storage portion of the container, and may be a flange-shaped portion. The shape of the outer circumference of the flange portion can be selected according to the shape of the lid material.

<Contents>
The contents are the contents housed in the storage unit. Examples of such contents include instant noodles containing dried flaky foods.

The present invention is useful when the content is instant noodles containing dried flaky foods. Here, in the present invention, the "dry flaky food" means a food in a flaky form in a state where the volume is increased by pouring hot water or water. Examples of dried flaky foods include dried seaweeds such as wakame seaweed and kelp, and dried leafy vegetables such as Japanese mustard spinach, garlic chives and spinach.

The present invention will be specifically described with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

<< Preparation of lid material >>
As a laminate for the lid material, a laminate having the following structure was produced from the outer layer side to the inner layer side (however, "//" represents a dry laminate adhesive):
Paper // PET1 / Easy-to-peel resin / PET2 // AL / Sealant layer.

Specifically, a laminate for the lid material was prepared as follows:

1. 1. Using a dry laminator, the amount of dry laminate adhesive applied is set to a dry weight of 2.5 g / m ² or more, and paper and PET1 are bonded via the dry laminate adhesive to form member a (paper //). PET1) was prepared.

2. Using a dry laminator, the amount of dry laminate adhesive applied is set to a dry weight of 2.5 g / m ² or more, and the aluminum foil and PET2 are bonded via the dry laminate adhesive to form member b (PET2 / / AL) was prepared.

3. 3. Using an extruded laminator, an easily peelable resin is extruded between the PET1 side of the member a and the PET2 side of the member b, sand-laminated, and the laminated film c (paper // PET1 / easily peelable resin / PET2 /). / AL) was prepared.

4. Using an extruded laminator, the sealant was back-laminated on the AL foil side of the member c to prepare a laminate (paper // PET1 / easily peelable resin / PET2 // AL / sealant layer) for the lid material. In this laminate, the laminate of paper // PET1 corresponds to the outer layer, and the PET2 // AL / sealant layer corresponds to the inner layer.

After engraving an outer layer half-cut line at a depth from the outer layer side of the laminate for the lid material to the easily peelable resin layer of the produced laminate with a rotary die cutter, the easily peelable resin is formed from the inner layer sealant layer side. An inner half-cut line for opening was carved at a depth reaching the layer, and at the same time, the outer peripheral edge of the lid was fully cut to obtain a lid material.

The arrangement and shape of the inner layer half-cut lines for openings in Examples and Comparative Examples, and the correspondence between the openings are shown in FIGS. 6 and 1. In the lid material of the example, the total area of the first opening occupies 90.5% of the total area of the openings formed by all the inner layer half-cut lines for opening. Further, in all the examples and comparative examples, the shape and area of the outer layer to be peeled off are the same.

Separately, the drainage time per opening of each opening was measured as follows, as shown in FIG.
The lid material having one opening formed is arranged so that the opening 320 is arranged in the center on the upper surface of the polypropylene tubular body 300 having a truncated cone-like outer shape having a height of 118 mm, an upper surface inner diameter of 102 mm, and a bottom inner diameter of 74 mm. When the tubular body 300 is inverted so that the opening 320 faces downward, 300 ml of water is put in from the bottom side, and water is discharged from the opening 320, the opening 320 is started from the time when the water is put in. The time until the water discharge from the water becomes discontinuous is measured, and this time is defined as the drainage time per opening.

Table 1 shows the shape, size, and drainage time of each opening shown in FIG. In Table 1 and FIG. 6, the first opening having a drainage time of 30 seconds or less is referred to as openings A1 to A5, and the second opening having a drainage time of 70 seconds or more is referred to as opening B1. ..

<< Evaluation >>
<Evaluation of drainage time>
The prepared lid material was heat-sealed in a polystyrene container having an inner diameter of 150 mm at the flange of the container. Next, the lid material was opened from the side opposite to the planned peeling portion, 5 g of dried wakame seaweed and 450 g of boiling water were placed in a container, and the mixture was rehydrated for 3 minutes. After 3 minutes, the outer layer of the planned peeling portion was peeled off to reveal an opening for draining hot water, and the hot water was discharged at an angle of 110 °. The time from the time of inclination to the discontinuity of hot water discharge was measured. The same measurement was performed 5 times for each lid material, and the average value and standard deviation of the hot water draining time were measured.

Table 2 shows the configurations and evaluation results of Examples and Comparative Examples.

From Table 2, the lid materials of the examples forming both the first opening and the second opening are the lid materials of Comparative Examples 1 and 2 forming only one of the first opening and the second opening. In comparison, it can be understood that the average value of the hot water draining time was short. Further, since the standard deviation of the hot water draining time of the lid material of the example is smaller than that of the lid materials of Comparative Examples 1 and 2, it can be understood that the hot water draining time is stable.

100 Cover material with peeling part 102 Outer layer 104 Easy peeling layer 106 Inner layer 110 Inner layer for opening opening Half cut line 112 First half cut line 112a First opening 114 Second half cut line 114a Second opening 120 Peeling trigger Inner layer half-cut line 130 Outer layer half-cut line 132 Expected peeling part 140 Peeling tab 150 Opening tab 200 Container 202 Flange part 202a Flange seal part 300 Polypropylene tubular body 310 Water 320 Opening for which drainage time should be measured A 1st Area B Second area

Claims (5)

A lid material with a peeling portion, which is composed of a laminated body having an outer layer and an inner layer, and a part of the outer layer can be peeled from the inner layer.
The outer layer has an outer layer half-cut line, and a planned peeling portion defined by the outer layer half-cut line and the outer circumference of the lid material.
The inner layer has a plurality of inner layer half-cut lines for forming openings at positions corresponding to the planned peeling portions.
The plurality of inner layer half-cut lines for forming openings have a plurality of first half-cut lines and a plurality of second half-cut lines.
The first half-cut line is present in the first region and has an oval shape.
The second half-cut line exists in the second region and has a U-shaped slit shape.
The first region and the second region are separated from each other, and the second region exists on the outer peripheral side of the first region, and the first and second regions are present. However, there is one for each,
The plurality of first half cut lines form a plurality of first openings having a drainage time of 30 seconds or less per opening defined as follows, and the plurality of second halves. A lid with peeling part, in which the cut line forms a plurality of second openings with a drainage time of 70 seconds or more per opening defined as follows:
The lid material having one opening formed is arranged on the upper surface of a polypropylene tubular body having a truncated cone-like outer shape having a height of 118 mm, an inner diameter of 102 mm on the upper surface, and an inner diameter of 74 mm on the bottom surface so that the opening is arranged in the center. When the tubular body is inverted so that the opening faces downward, 300 ml of water is put in from the bottom surface side, and the water is discharged from the opening, from the time when the water is put in, The time until the water discharge from the opening becomes discontinuous is measured, and this time is defined as the drainage time per opening. The lid material with a peeling portion according to claim 1, wherein the line connecting both ends of the second half-cut line exists substantially perpendicular to the direction in which the outer layer is peeled. Containers with storage and flanges,
The lid material with a peeling portion according to claim 1 or 2, wherein the contents contained in the container and the flange portion of the container are heat-sealed to seal the container. A container with a lid containing the contents. The container with a lid containing the contents according to claim 3, wherein the contents are instant noodles containing dried flaky food. The container with a lid containing the contents according to claim 3 or 4, wherein the second half-cut line of the lid material exists in the vicinity of the flange portion of the container.

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