JP6598697B2 - Lid with peeling part - Google Patents

Description

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

  Instant ramen and instant fried noodles that are poured by pouring water or hot water require drainage or hot water when eating or drinking, so a container with a mechanism that peels off a part of the lid and exposes the opening for hot water Is used. The peeling portion as a part of the lid is defined by the outer layer half cut line, and the opening is defined by the inner layer half cut line. Examples of the shape of the opening include a round shape and an elongated shape such as an oval shape.

  When the outer layer is peeled off, the planned opening portion of the inner layer does not follow the peeled portion of the outer layer and remains in the inner layer, which may cause a hole residue that prevents the opening from being opened. In the case where a hole remains, the planned opening portion remaining in the inner layer may drop into the container with a slight force and be mixed into the contents, which is not preferable for hygiene purposes. In order to eliminate this hole residue, various means have been proposed.

  In Patent Document 1, by pulling the peeling tab provided on the outer edge and peeling the outer layer covering the inner layer from the inner layer, the planned opening portion formed from the inner layer side is removed along with the outer layer. In the hot water lid material that reveals the opening, the shape of the opening defined by the inner layer half-cut line is an elongated shape, and the peeling tab is provided on the outer edge in the width direction of the opening defined by the inner layer half-cut line. A hot water lid material characterized in that it is disclosed is disclosed. In Patent Document 1, it is assumed that a hole residue can be prevented by this configuration.

JP 2005-82173 A

  Even when the cover material of Patent Document 1 is used, a hole residue may be generated depending on how to open.

  More specifically, in the lid material (200a) of Patent Document 1, when the planned separation part is peeled in the planned peeling direction (40a) as shown in FIG. Since an opening force is applied in the minor axis direction, the planned opening portion is separated from the inner layer without being greatly bent, and as a result, no hole remains as shown in FIG.

  However, when the part to be peeled is peeled off in the peeling direction (40b) which is not planned as shown in FIG. 4 (a), the cover part (200a) of Patent Document 1 is peeled off by applying a snap, for example. In this case, since the opening force is applied in the major axis direction of the planned opening portion, the planned opening portion is largely bent and separated from the inner layer, and is peeled off from the outer layer by the elastic repulsive force. As shown in 4 (b), a hole residue (38c) may occur.

  Accordingly, there is a need to provide a lid member with a peeling portion in which no hole remains even when the peeling scheduled portion is peeled in a direction different from the original direction.

As a result of intensive 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:
<1> It is composed of a laminate having an outer layer and an inner layer, and the outer layer is peelable from the inner layer, and is a lid member with a peeling portion,
The lid member is defined by an outer layer half-cut line and an outer periphery of the lid member, the outer layer is to be separated, and a plurality of inner layer openings defined by a plurality of inner layer half-cut lines. Has a planned part,
When the planned peeling part is peeled from the inner layer, the planned opening part is separated from the other part of the inner layer together with the planned peeling part, and an opening is formed in the inner layer.
The outer layer half-cut line has an arcuate portion that is convex on the center side of the lid,
The major axis direction of the plurality of planned opening portions and the peeling direction of the planned peeling portion are substantially orthogonal to each other, and a virtual line connecting the center side end portions of the plurality of planned opening portions is substantially the same as the outer half-cut line. The plurality of scheduled openings are arranged in parallel so as to have arc-shaped portions that are parallel,
Cover material with peeling part.
<2> The lid material according to <1>, wherein each of the planned opening portions is arranged in parallel in the peeling direction at substantially equal intervals.
<3> The lid member according to <1> or <2>, wherein a shortest distance between each of the planned opening portions and the outer layer half-cut line is 0.5 to 4.0 mm.
<4> The lid member according to any one of <1> to <3>, wherein the elongated shape is an oval.
<5> The lid according to any one of <1> to <4>, wherein the outer layer half-cut line and the virtual line are arcuate.
<6> The lid member according to any one of <1> to <4>, wherein each of the outer layer half-cut line and the virtual line has a plurality of arc-shaped portions.
<7> The lid material according to any one of <1> to <6>, wherein the lid material has a substantially quadrangular shape and the portion to be peeled is present at a corner of the lid material.
<8> A laminate for forming a lid material, comprising the lid material according to any one of the above <1> to <7> and a surplus portion between the plurality of the lid materials.
<9> Container,
The content accommodated in the container, and heat sealed at the flange portion of the container, thereby sealing the container, according to any one of the above items <1> to <7>. A container with a lid containing contents, which is provided with a lid.
<10> The container with a lid material containing the content according to <9>, wherein the content is instant noodles.

  According to the present invention, it is possible to provide a lid member with a peeling portion in which no hole remains even when the peeling scheduled portion is peeled in a direction different from the original direction.

FIG. 1 is a top view of the lid member of the present invention. Fig.1 (a) is a figure which shows the state before peeling a peeling plan part, and FIG.1 (b) is a figure which shows the state after peeling a peeling plan part. FIG. 2 is a side sectional view of the lid member of the present invention. FIG. 2A is a side cross-sectional view taken along line Ia-Ia in FIG. 1A, that is, before the part to be peeled is peeled, and FIG. 2B is FIG. It is side surface sectional drawing in line Ib-Ib of the state after peeling a plan part. FIG. 3 is an explanatory diagram before and after peeling of a conventional lid member. FIG. 3A is a diagram showing a state before peeling the planned separation portion, and FIG. 3B is a diagram showing a state after peeling the planned separation portion. FIG. 4 is an explanatory diagram before and after peeling of a conventional lid member. FIG. 4A is a diagram showing a state before peeling the planned separation portion, and FIG. 4B is a diagram showing a state after peeling the planned separation portion. FIG. 5 is a top view of another aspect of the lid member of the present invention. FIG. 6 is a view showing a lid-forming laminate of the present invention. FIG. 7 is a diagram showing a container with contents with a lid according to the present invention. FIG. 8 is a schematic diagram of the lid material of the example and the comparative example.

《Cover with peeling part》
As shown in FIG. 2A, the lid member with a peeling portion (100a) of the present invention has an outer layer (10) and an inner layer (30). This outer layer (10) is peelable from the inner layer (30). An easily peelable layer (20) may be present between the outer layer (10) and the inner layer (30). The inner layer (30) may be a laminate of the base material layer (32) and the sealant layer (34).

  The lid member (100a) has a planned peeling portion (14) and a plurality of planned opening portions (38).

  As shown to Fig.1 (a), the peeling plan part (14) is demarcated by the outer periphery of the outer-layer half cut line (12) and the cover material (100a). This outer layer half cut line (12) has an arcuate portion that is convex on the center side of the lid member (100a).

  The plurality of planned openings (38) are defined by a plurality of inner layer half-cut lines (36) and have an elongated shape.

  Here, examples of the “elongate shape” include a rectangle, an ellipse, and an oval shape, but the shape is preferably an oval shape from the viewpoint of favorably following the part to be peeled to the outer layer side.

  And the major axis direction of the plurality of planned opening portions (38) and the peeling direction of the planned separation portion (14) are substantially perpendicular to each other, and a virtual line connecting the center side end portions of the plurality of planned opening portions (38) ( A plurality of planned opening portions (38) are arranged in parallel so that 38a) has an arcuate portion that is substantially parallel to the outer layer half-cut line (12). These scheduled openings (38) may be arranged in parallel at substantially equal intervals in the peeling direction.

  In order to determine the peeling direction, it is preferable that the planned peeling portion (14) includes a peeling tab (16). This peeling tab (16) is present at the outer edge in the peeling direction, that is, at the outer edge in the minor axis direction of the planned opening part (38), in the peeling intended part (14) from the viewpoint of applying the peeling force in the intended direction. It is preferable.

  Here, “substantially orthogonal” means that the angle between the half cut line and the peeling direction is 90 ° ± 30 °, or 90 ° ± 20 °, particularly 90 ° ± 10 °, more particularly 90 ° ± 5 °. It is said that it is in the range.

  In addition, “substantially parallel” includes not only the case where the planned opening portion (38) is in parallel so that the outer layer half-cut line (12) and the virtual line (38a) are completely parallel, but also the outer layer half-cut line. Including the case where the center side end of each opening planned portion is displaced within 2.0 mm, within 1.5 mm, within 1.0 mm, or within 0.5 mm with respect to the line parallel to (12) .

  Furthermore, “substantially equidistant” means that the deviation of the spacing of each planned opening is within 15%, particularly within 10%, and more particularly within 5% with respect to the average of the spacing between all planned openings. It is what you say.

  The outer layer half-cut line (12) and the virtual line (38a) may be entirely arcuate as shown in FIG. 1 (a), and have a plurality of arcuate parts as shown in FIG. May be.

  The distance between each planned opening portion (38) and the outer layer half cut line (12) can be 0.5 mm or more, 0.8 mm or more, or 1 mm or more, and 4.0 mm or less. It can be 8 mm or less, 3.5 mm or less, or 3.0 mm or less.

  When the planned peeling portion (14) is peeled from the inner layer (30), as shown in FIGS. 1 (b) and 2 (b), the planned opening portion (38) and the planned peeling portion (14) are formed on the inner layer (30). Separated from other portions, an opening (38b) is formed in the inner layer (30).

  The inventors have arranged the plurality of scheduled openings in parallel so that the imaginary line connecting the center side end portions of the plurality of scheduled openings has an arcuate portion that is substantially parallel to the outer layer half-cut line. As a result, it was found that no hole residue is generated when the planned peeling portion is peeled. Although not wishing to be bound by theory, in the case where the outer layer half-cut line has an arc-shaped portion that is convex on the center side of the lid member, a virtual line that connects the center side end portions of the plurality of planned opening portions, It is considered that the distance between the inner layer half cut line and the outer layer half cut line is shortened by having the arc-shaped portion that is substantially parallel to the outer layer half cut line. As a result, even if an opening force is applied in the major axis direction of the planned opening portion, the bending of the planned opening portion is reduced on the side close to the outer half-cut line, and as a result, the elastic repulsive force that causes the remaining hole Is expected to be eased.

  The lid member of the present invention preferably has a substantially polygonal shape, particularly a substantially rectangular shape. Here, “substantially polygonal” means not only polygons such as triangles such as regular triangles, isosceles triangles, right triangles, squares, rectangles such as rectangles, but also all or part of the corners of these polygons. Also included are rounded polygons such as rounded, rounded triangles and rounded squares. In this case, it is preferable that the part to be peeled is formed at the corner of the lid member.

  In another aspect of the present invention, as shown in FIG. 5, the outer layer half cut line (12) and the imaginary line (38a) may have a plurality of arcuate portions.

  Below, each component of this invention is demonstrated.

<Laminated body>
The laminated body which comprises the cover material of this invention is a laminated body of an outer layer and an inner layer. The outer layer is peelable from the inner layer. In order to make the outer layer and the inner layer peelable from each other, an easily peelable layer may be provided between the outer layer and the inner layer.

(Outer layer)
The outer layer of the lid member is a layer that becomes the outermost layer of the lidded container when the lid member is attached to the container. Further, the outer layer can be laminated and adhered to the inner layer of the lid, and then peeled off from the inner layer.

  For example, the outer layer becomes the outermost layer of the lidded container by being laminated on the inner layer. Moreover, an outer layer can be peeled from an inner layer by picking up and pulling up the peeling tab.

  The outer layer may have a single layer structure or a multilayer structure in which a plurality of layers are stacked.

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

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

  Furthermore, it is preferable to apply OP (Over Print) varnish to the surface of the paper layer.

  By applying the OP varnish, moisture permeation from the surface of the paper layer can be suppressed, and curling can be reduced during storage in a single wafer state after being cut into a lid shape by full cut.

  In addition, it is particularly preferable to provide a printing layer on the surface of the paper layer and apply OP varnish thereon to protect the printing layer.

  As the resin layer, a commercially available film or an extruded resin can be used as appropriate.

  For example, as a film, polyethylene terephthalate film (PET), low density polyethylene film (LDPE), medium density polyethylene film (MDPE), high density polyethylene film (HDPE), linear low density polyethylene film (LLDPE), polypropylene film ( PP), nylon film (Ny) and the like may be used alone or in combination.

  Extrusion resins include low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), ethylene methacrylic acid copolymer (EMAA), ethylene acrylic acid copolymer A combination (EAA) or the like may be used alone or in combination.

  Further, the resin layer may include other layers such as an adhesive layer, an inorganic vapor deposition layer, and a barrier coat layer.

  As the metal foil layer, for example, a 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 member is a layer that becomes the innermost layer when the lid member is attached to the container.

  Moreover, an inner layer is laminated | stacked with the outer layer of a cover material, and can peel an outer layer after that. Further, the inner layer can receive a blade for forming the half cut line so that the half cut line penetrates a part or the whole of the 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 multilayer structure in which a plurality of layers are stacked. The inner layer can be, for example, a laminate of a base material layer and a sealant layer.

  As the base material layer, commercially available films, extruded resins, and the like can be used as appropriate. For example, as a film, polyethylene terephthalate film (PET), low density polyethylene film (LDPE), medium density polyethylene film (MDPE), high density polyethylene film (HDPE), linear low density polyethylene film (LLDPE), polypropylene film ( PP), nylon film (Ny) and the like may be used alone or in combination. The resin includes low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), linear low density polyethylene (LLDPE), ethylene methacrylic acid copolymer (EMAA), and ethylene acrylic acid copolymer. (EAA) or the like may be used alone or in combination.

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

  The inner layer may have a sealant layer on the side that is the innermost layer of the lid. 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. For example, LDPE, LLDPE, PP, ethylene-methacrylic acid copolymer (EMAA), ethylene-acrylic acid copolymer (EAA), ionomer resin, ethylene-vinyl acetate. It may be a resin such as a copolymer. These resins can be provided in the form of, for example, a stretched or unstretched film, a molten resin for extrusion lamination, a coating material for hot melt, and the like.

  Particularly preferred is an easy peel sealant with easy peelability, such as a sealant mixed with resins of different compositions and given a sea-island structure, or a sealant that has multiple layers of sealant and peels when peeled. .

  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.

(Easily 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 on a portion where the outer layer and the inner layer are peeled, 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 polyolefin at a predetermined ratio.

  Examples of the polyolefin include a polyethylene resin and a polypyrene resin, and low density polyethylene (LDPE) is preferable. Examples of LDPE include a trade name “Petrocene” manufactured by Tosoh Corporation and a trade name “Suntech” manufactured by Asahi Kasei Chemicals Corporation.

  The MFR (melt flow rate) of polyolefin is 0.01 g / 10 min or more, 0.1 g / 10 min or more, when measured under the condition of temperature 190 ° C./load 2.16 kg in accordance with JIS K7210, or It may be 1.0 g / 10 min or more, and may be 60 g / 10 min or less, 20 g / 10 min or less, or 10 g / 10 min or less.

The density of the polyolefin may be 0.89 g / cm ³ or more, and the density may be 0.94 g / cm ³ or less.

  The cyclic olefin copolymer (COC) is a so-called Ziegler catalyst, metallocene, which is obtained by converting an α-olefin and a cyclic olefin into hydrocarbon solvents such as hexane, heptane, octane, cyclohexane, benzene, toluene, and xylene. It refers to a copolymer that can be obtained by preparing a catalyst such as a catalyst. Examples of such a copolymer include trade name “Apel” manufactured by Mitsui Chemicals, Inc.

  The COC MFR is in accordance with JIS K7210, measured at a temperature of 190 ° C./load of 2.16 kg, 0.1 g / 10 min or more, 1.0 g / 10 min or more, or 2.0 g / 10 The MFR may be 40 g / 10 min or less, 20 g / 10 min or less, or 10 g / 10 min or less at a temperature of 190 ° C.

  The easily peelable resin layer can adjust the interfacial peel strength 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 the content may be 24% by mass or less or 10% by mass or less. If it is such a range, the content of COC is preferable because interfacial peeling between the inner layer or outer layer and the easily peelable resin layer becomes easy, and the peel strength of both is easily controlled.

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

  In addition, the easily peelable layer may be a nitrocellulose resin, an acrylic resin, a urethane resin, an amino alkyd resin, a polyamide resin, a polyester resin, or a mixture thereof, an aqueous varnish, an oil varnish, an ultraviolet curable varnish, etc. It may be.

  The release varnish is more preferably a mixture of an easily peelable resin and a 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. Such a range is preferable because picking of another layer adjacent to the peeling varnish layer can be prevented and delamination of the peeling varnish layer can be prevented.

(Lamination of layers)
The layers can be laminated by, for example, extrusion lamination such as sand lamination or back lamination, dry lamination, or the like.

  In particular, the lamination of the inner layer and the outer layer can be performed via an easily peelable layer. More specifically, when the easily peelable layer is an easily peelable resin layer, or a combination of this and a peelable varnish, the lamination of the inner layer and the outer layer is performed via a readily peelable resin layer, such as a sand laminate. It can be performed by a stacking means. When the easily peelable layer is a release varnish, an adhesive layer may be further laminated between the inner layer and the outer layer. As this adhesive layer, for example, a dry laminate adhesive can be used.

<Half cut line>
The half cut line is a cut formed at a depth less than the thickness of the lid material from the surface of the lid material.

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

  For example, the inner layer half-cut line is engraved from the surface of the inner layer of the lid material to a depth penetrating at least a part or all of the inner layer.

  The inner layer half-cut line is engraved with a depth penetrating at least part or all of the inner layer in the thickness direction of the inner layer of the lid. Therefore, the depth of the inner layer half cut line is substantially equal to the thickness of the inner layer of the lid.

  For example, when an easily peelable resin layer is disposed between the outer layer and the inner layer of the lid, the inner layer half cut line can be formed from the surface of the inner layer to a depth reaching the easily peelable resin layer. In this case, the outer layer can be peeled off at the interface between the inner layer and the easily peelable resin layer. Moreover, an inner layer half cut line can be formed until it penetrates an easily peelable resin layer from the surface of an inner layer. In this case, the outer layer can be peeled at the interface between the outer layer and the easily peelable resin layer.

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

(Outer layer half cut line)
The outer layer half-cut line is a half-cut line for defining a separation scheduled portion.

(Inner half cut line)
The inner layer half cut line is a half cut line for demarcating the planned opening portion.

  Here, the “opening” means a configuration capable of discharging the liquid inside, particularly hot water, or allowing the outside air to circulate through the inside, and particularly in the present invention, the inner layer is cut into the inner layer by the inner layer half-cut line. It refers to a defined area.

<Scheduled release part>
The part to be peeled is defined by the outer layer half-cut line and the outer periphery of the lid member.

  When the lid material of the present invention has a substantially polygonal shape, it is preferable that the part to be peeled exists at the corner from the viewpoint of smoothly performing hot water cutting.

  Moreover, it is preferable that a peeling plan part has a tab for peeling from a viewpoint which peels a peeling plan part easily. From the viewpoint of applying the peeling force in the intended direction, the peeling tab is preferably present at the outer edge in the minor axis direction of the planned opening portion in the planned peeling portion.

<Scheduled opening>
The planned opening portion is defined by the inner half cut line and has an elongated shape. Here, examples of the “elongate shape” include a rectangle, an ellipse, and an oval shape, but the shape is preferably an oval shape from the viewpoint of favorably following the part to be peeled to the outer layer side.

  The length in the major axis direction of the planned opening portion can be, for example, 8 mm or more, 9 mm or more, 10 mm or more, or 12 mm or more, and can be 40 mm or less, 35 mm or less, or 30 mm or less. The length in the major axis direction of each opening planned portion may be the same or different.

  The length in the minor axis direction of the planned opening can be 2.0 mm or more, 2.5 mm or more, or 3.0 mm or more, and is 6.0 mm or less, 5.5 mm or less, or 5.0 mm or less. Can be. The length in the major axis direction of each opening planned portion may be the same or different, but is preferably substantially the same.

(Virtual line)
The imaginary line is a line connecting the center side end portions of the plurality of planned opening portions. It should be noted that this line is not actually drawn on the lid member, but is an imaginary line for specifying the positions of the plurality of scheduled openings.

  The imaginary line has an arcuate portion that is substantially parallel to the outer half-cut line. The imaginary line may be an arcuate part as a whole, or may have a plurality of arcuate parts.

<Other parts>
The lid | cover material of this invention may have another part as needed, for example, may have a tab for opening for opening a container with a lid | cover material in the periphery of a lid | cover material.

<< Laminate for Lid Forming >>
As shown in FIG. 7, the laminate for forming a lid material (300) of the present invention has a plurality of the above-mentioned lid materials (100a) and an excess portion (120) between the plurality of lid materials.

  The laminated body for lid material formation can be, for example, a roll-like or sheet-like laminated body having a plurality of the above-mentioned lid materials. As a layer structure of this laminated body, it can be the layer structure mentioned regarding said lid | cover material.

  The lid material of the present invention can be produced by cutting or punching the laminate for forming the lid material into the shape of the lid material.

<Container with contents with lid>
As shown in FIG. 8, the container (600) with contents with a lid | cover is equipped with the container (400), the contents (500), and said lid | cover material (100a). In particular, the lid (100a) is heat-sealed at the flange (400a) of the container, thereby sealing the container (400).

  The container with contents with a lid can be opened by peeling the lid from the container.

(container)
A container is a container which has an opening part and can put an object in an opening part. Moreover, the opening part of a container can be sealed with a cover material.

  The container has a flange portion that is used to join the lid material to the periphery of the opening of the container. Moreover, in order to promote the coupling | bonding with a cover material, the coupling | bonding promoters, such as an adhesive agent, may be arrange | positioned at the flange part.

  The material of the container can be arbitrarily selected according to the contents of the container.

  For example, the container can be formed of a material that is impermeable to the contents so that the contents of the container do not ooze out of the container. More specifically, the container may be formed from a resin such as polypropylene.

  The container can contain contents such as instant noodles.

(Contents)
The contents are contained in a container.

  As the contents, for example, what is supposed to be poured after the lid is opened and then discharged to perform processing such as cooking, such as instant noodles, can be mentioned.

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

<Production of cover material>
<Example>
The following materials were prepared:
Coated paper (basis weight: 80 g / m ² ): Ryuo Coat, Daio Paper Co., Ltd. Dry laminate adhesive: Takelac A-953 / Takenate A-93, Mitsui Chemicals, Inc. PET (thickness: 12 μm): E5100, Toyobo Co., Ltd. Company Easily peelable resin (thickness 20 μm): LDPE (95% by mass, Petrocene 226 (Tosoh Corporation) + COC (5% by mass, Appel 6013B, Mitsui Chemicals, Inc.)
PET (thickness: 8 μm): CB901, KOLON Aluminum foil (thickness: 6.5 μm): soft aluminum Dry laminate adhesive: LX-500 / KW-75, DIC Graphics Corporation Sealant layer: CMPS (trademark) VN503, Mitsui DuPont Polychemical

The laminate obtained in this example is made of paper (basis weight: 80 g / m ² ) // PET (12) / easily peelable resin (20 μm) / PET (8 μm) // AL (6.5 μm) / sealant ( 20 μm) (where “//” represents a dry laminate adhesive).

A lid was made as follows:
1. Using a dry laminator, the amount of dry laminate adhesive applied was set to a dry weight of 2.5 g / m ² or more, and the paper and PET film “E5100” were combined with the dry laminate adhesive “Takelac A-953 / Takenate A-93”. To obtain member a (paper (basis weight: 80 g / m ² ) // PET (12 μm)) as an outer layer.
2. Using a dry laminator, set the dry laminate adhesive coating amount to a dry weight of 2.5 g / m ² or more, and apply aluminum foil and PET film “CB901” to the dry laminate adhesive “LX-500 / KW-75”. To obtain a member b (PET (8 μm) // AL (6.5 μm)) as a base material layer.
3. An easily peelable resin as an easily peelable layer between the PET film “E5100” side of member a and the PET film “CB901” side of member b at a temperature of about 320 ° C. to about 340 ° C. using an extrusion laminator. Was extruded and sand-laminated to obtain a laminated film c.
4). Using an extrusion laminator, “CMPS ™ VN503” as a sealant layer was extruded onto the aluminum foil side of the member c at a temperature of about 240 ° C., and back laminated to obtain a laminated film d.
5. After the circular die outer layer half cut line is engraved at a depth from the outer layer of the laminated film d to the easily peelable layer with a rotary die cutter, the inner layer half cut having an opening shape at a depth from the sealant layer to the easily peelable layer A line was engraved, and the outer periphery of the lid was fully cut to obtain a lid material.

  As shown in FIG. 8A, the inner layer half-cut line has an arcuate shape in which the entire imaginary line connecting the center end of the planned opening portion (38) is substantially parallel to the outer layer half-cut line (12). It was engraved as follows. The short side width of the hole was 4 mm, and the distance between the outer layer half cut line (12) and the center side end of the planned opening portion (38) was 2 mm (within an error of ± 1 mm).

<Comparative example 1>
As shown in FIG. 8 (b), the inner layer half-cut line was compared in the same manner as in Example 1 except that the center side end portion of the planned opening portion (38) was engraved so as to be aligned. The lid material of Example 1 was produced. The distance between the outer half-cut line (12) and the central end of the planned opening portion (38) was 9 mm at the planned opening portion (38) at both ends, and 11 mm at the planned opening portion (38) at the center. .

<Comparative example 2>
As shown in FIG. 8 (c), the inner layer half cut line was compared in the same manner as in Example 1 except that the center side end portion of the planned opening portion (38) was engraved in a straight line. The lid material of Example 2 was produced. The distance between the outer layer half cut line (12) and the center side end of the planned opening portion (38) was 3 mm at the planned opening portion at both ends, and 5 mm at the planned opening portion at the center.

<Evaluation>
The lids of Examples and Comparative Examples 1 and 2 were placed at 170 ° C. on the flange portion of a polystyrene container (square shape, short side length 171 mm, long side length 233 mm, height 57 mm, flange width 7 mm, pouring amount 820 ml). , 0.4 second, 0.12 MPa pascal twice sealing. Twelve containers in which the lids of Examples and Comparative Examples 1 and 2 were heat-sealed were similarly prepared and evaluated.

  Open the sample to half of the container, pour 820 ml of boiling (96 ° C.) hot water, reseal the lid, and after 5 minutes, place the part to be peeled in the direction described in 40b of FIG. 4 (a). It was peeled off by applying force, and the state of the remaining hole was visually observed. If there is no hole residue, it will be judged as ◯, if there is some hole residue, △ will be judged, if there is more than half of the hole residue, or if the planned opening will not completely follow the outer layer and will be peeled off X was determined.

  The results are shown in Table 1.

  From Table 1, it can be understood that the lid material of the example does not cause a hole residue as compared with the lid materials of Comparative Examples 1 and 2. In addition, the cover material of Comparative Examples 1 and 2 was conspicuously generated in the planned opening portion at the center where the distance between the outer layer half-cut line and the planned opening portion was long among the plurality of planned opening portions.

  In addition, when using the lid | cover material of an Example normally, that is, noodles are put, and a part to be peeled is peeled off after 3 minutes have passed since resealing. However, in the evaluation, noodles are not added, and the part to be peeled is peeled off after 5 minutes from normal resealing. By changing the conditions in this manner, the resin at the peeled portion is softened, the adhesion strength is lowered, and the outer layer and the inner layer are more easily peeled off. That is, in the present embodiment, in order to guarantee the quality, it is confirmed whether or not the planned opening portion phenomenon occurs under more severe conditions. Therefore, it can be understood that no hole residue naturally occurs when the lid material of the embodiment in which no hole residue is generated in this evaluation is normally used.

DESCRIPTION OF SYMBOLS 10 Outer layer 12 Outer layer half cut line 14 Peeling part 16 Peeling tab 20 Easy peelable layer 30 Inner layer 32 Base material layer 34 Sealant layer 36 Inner layer half cut line 38 Opening part 38a Virtual line 38b Opening 38c Residual part 40a, 40b Peeling Direction 100a, 100b, 100c Lid material of the present invention 120 Surplus part 200a, 200b Conventional lid material 300 Laminate for lid material formation 400 Container 400a Flange portion of container 500 Contents 600 Container with contents with lid

Claims (10)

It is composed of a laminated body having an outer layer and an inner layer, and the outer layer is a lid member with a peeling portion that can be peeled from the inner layer,
The lid material is
The outer layer half-cut line and the outer layer to be separated are defined by the outer periphery of the lid member, and the inner layer half-cut lines are defined by a plurality of inner layer half-cut lines, and the inner layer has a plurality of inner layer scheduled openings. ,
When the planned peeling part is peeled from the inner layer, the planned opening part is separated from the other part of the inner layer together with the planned peeling part, and an opening is formed in the inner layer.
The outer layer half-cut line has an arcuate portion that is convex on the center side of the lid member,
The major axis direction of the plurality of planned opening portions and the peeling direction of the planned peeling portion are substantially orthogonal to each other, and a virtual line connecting the center side end portions of the plurality of planned opening portions is substantially the same as the outer half-cut line. A plurality of planned opening portions are arranged in parallel so as to have arc-shaped portions that are parallel to each other,
Cover material with peeling part.   The lid member according to claim 1, wherein each of the planned opening portions is arranged in parallel in the peeling direction at substantially equal intervals.   The lid | cover material of Claim 1 or 2 whose shortest distance of each said opening plan part and the said outer-layer half cut line is 0.5-4.0 mm respectively.   The lid member according to any one of claims 1 to 3, wherein the elongated shape is an oval shape.   The lid | cover material as described in any one of Claims 1-4 whose whole outer layer half cut line and the said virtual line are circular arc shape.   The lid | cover material as described in any one of Claims 1-4 in which the said outer-layer half cut line and the said virtual line each have a some arcuate part.   The lid | cover material as described in any one of Claims 1-6 which is a substantially square shape and the said peeling plan part exists in the corner | angular part of the said lid | cover material.   The laminated body for lid | cover material formation which has a cover material as described in any one of Claims 1-7, and the surplus part between these several said lid | cover materials. container,
The contents contained in the container, and the lid material according to any one of claims 1 to 7, which is heat-sealed at a flange portion of the container and thereby seals the container. A container with a lid with contents.   The container with a lid material containing contents according to claim 9, wherein the contents are instant noodles.

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