JP2019043661A - Lidded container - Google Patents

Abstract

To provide a lidded container which has sealability and easy opening properties compatibly.SOLUTION: A lidded container according to the present invention is a lidded container 400 which comprises a container 200, contents 300, and a lid material 100, and is characterized in that: a border between a flange part 204 and a tongue piece part 202 of the container is defined with a bent break line 208; the lid material is composed of a laminate having an outer layer 106 and an inner layer 102; a border between a main body part 110 and a tab part 120 is defined with an inner layer half-cut line 102a for peeling start; and an inner layer half-cut line 102b for opening formation is present in a region encircled with a storage part peripheral edge seal part 404; and the inner layer half-cut line for peeling start is present on the bent break line or more on a storage part side than the bent break line.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a container with a lid.

  Conventionally, containers with lids are used to enclose liquids such as milk and gum syrup for tea and coffee, and semi-solids such as food jams. The container with a lid is provided with a tongue piece portion for sealing the storage portion of a container made of thermoplastic resin such as polypropylene with a sheet-like lid material made of aluminum or synthetic resin and making it easy to peel off, At the time of opening, the tongue piece portion is bent and broken, and the lid member is pulled up and peeled off for easy opening. A container with a lid is required to have properties such as high sealing performance and good openability, and various means have been proposed in order to satisfy such requirements.

  In Patent Document 1, a container body having a tongue piece portion formed by forming a storage portion on the upper surface of the flange portion and being broken by a bending break line in which a part of the flange portion extends to one side, the flange portion and the outer edge A container comprising a sheet-like lid body having the same shape and welded to the flange portion, wherein a welded portion that gently connects the periphery of the opening and the center of the tongue piece is formed. Is disclosed.

JP 2010-23925 A

  In Patent Document 1, when opening the lid member from the container body by breaking the tongue piece portion at the time of opening, the force is concentrated on a straight line, and the welding portion provided at the periphery of the opening portion is gradually peeled off to reduce the size. It is said that it can be easily peeled off by pulling up the sheet-like lid when opening.

  However, in order to ensure the sealing performance between the container and the lid, it is necessary to increase the sealing strength of the welded portion. In particular, with respect to the seal portion at the periphery of the opening, it is necessary to firmly seal the entire periphery of the opening, and as a result, a large force may be required to open the seal.

  Thus, sealability and easy-openability are contradictory effects, and it has been difficult to achieve both.

  Therefore, a container with a lid that satisfies both sealing performance and easy-opening property has been demanded.

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> A container with a lid, comprising a container, contents stored in the container, and a lid member that seals the container,
(I) The container includes a storage portion, a flange portion at the periphery of the storage portion, and a tongue piece portion protruding from the flange portion,
The boundary between the flange portion and the tongue piece portion of the container is demarcated by a folding line,
(Ii) The lid is composed of a laminate having an outer layer and an inner layer, and the outer layer is peelable from the inner layer,
The lid material has an outer peripheral shape substantially the same as the outer peripheral shape of the flange portion and the tongue piece portion of the container;
The lid member includes a main body portion and a tab portion protruding from the main body portion so as to correspond to the tongue piece portion,
An inner layer half cut line for opening formation is formed in the lid material so as to form an opening in a partial region of the main body portion of the lid material,
The boundary between the main body portion of the lid material and the tab portion is defined by an inner layer half cut line for peeling off the lid material,
(Iii) The container and the lid member are
A seal for sealing the peeling edge formed across the inner half-cut line for peeling trigger of the container, and a seal for sealing the peripheral edge of the container formed on the peripheral edge of the container of the container; Fused,
(Iv) The opening forming inner layer half-cut line of the lid member is present in a region of the main body portion of the lid member surrounded by the storage portion peripheral seal portion, and (v ) An inner layer half cut line for peeling trigger of the lid material is present on the folding break line of the container, or closer to the storage part than the folding break line of the container.
Container with lid.
<2> The container with a lid according to <1>, wherein the peeling trigger seal portion of the lid material crosses 5% to 80% of the length of the inner layer half cut line for peeling trigger.
<3> The lidded container according to <1> or <2>, wherein the peeling trigger seal portion of the lid material is formed so as to further cross the bending break line of the container. .
<4> The container with a lid according to <3>, wherein the peeling trigger seal portion of the lid material crosses 5% to 80% of the length of the bending break line of the container.
<5> The <1> to <4> items above, wherein the peeling trigger seal portion of the lid member is formed in one or a plurality of strips extending between the main body portion and the tab portion. The container with a lid according to any one of the above.
<6> The lid according to any one of <1> to <5>, wherein the opening inner layer half-cut line of the lid member is formed at a position corresponding to the flange portion of the container. Attached container.
<7> The lidded container according to any one of <1> to <6>, wherein a plurality of the inner layer half cut lines for peeling trigger of the lid member are formed substantially in parallel.

  According to the present invention, it is possible to provide a container with a lid that achieves both sealing performance and easy opening.

Fig.1 (a) is a top view of the container with a lid of the present invention. FIG.1 (b) is side surface sectional drawing of the container with a lid | cover of this invention. FIG. 2 is a view showing an opening mechanism of the lidded container of the present invention. FIG. 3 is a diagram illustrating an example of a formation region of the peeling trigger seal portion. FIG. 4 is an explanatory diagram of a preferred embodiment of the formation region of the peeling trigger seal portion. FIG. 5 is a diagram illustrating an example of the formation region of the opening inner layer half-cut line. FIG. 6 is a diagram illustrating a positional relationship among the seal portion, the peeling trigger inner layer half cut line, and the bending break line in the lid materials of the examples and the comparative examples.

<Container with lid>
As shown in FIG. 1, the container with a lid of the present invention includes a container (200), a content (300) stored in the container (200), and a lid (100) sealing the container (200). A container with a lid (400) comprising:
(I) The container (200) includes a storage portion (206), a flange portion (204) at the periphery of the storage portion (206), and a tongue piece portion (202) continuous with the flange portion (204). And
The boundary between the flange (204) and the tongue (202) of the container (200) is defined by a fold break line (208);
(Ii) The lid (100) is composed of a laminate having an outer layer (106), an optional easily peelable layer (104) and an inner layer (102), and the outer layer (106) is an inner layer (102). Can be peeled off from
The lid member (100) has an outer peripheral shape substantially the same as the outer peripheral shape of the flange portion (204) and the tongue piece portion (202),
The lid member (100) includes a tab portion (120) protruding from the main body portion (110) so as to correspond to the main body portion (110) and the tongue piece portion (202),
An opening forming inner layer half cut line (102b) is formed in the lid member (100) so as to form an opening in a partial region of the main body portion (110) of the lid member (100).
The boundary between the main body portion (110) of the lid member (100) and the tab portion (120) is defined by an inner layer half cut line (102a) for peeling trigger of the lid member (100),
(Iii) The container (200) and the lid (100)
The container (200) is formed on the periphery of the storage part (206), and the storage part peripheral seal part (402) and the inner layer half-cut line (102a) for peeling trigger of the lid member (100) are crossed. The formed seal portion for peeling trigger (404)
Are fused together,
(Iv) A region in which the opening forming inner layer half-cut line (102b) of the lid member (100) is surrounded by the storage portion peripheral seal portion (402) in the main body portion (110) of the lid member (100). And (v) the inner layer half cut line (102a) for peeling the cover material (100) is on the folding line (208) of the container (200) or the folding of the container (200). It exists on the storage part (206) side from the curved break line (208),
It is a container (400) with a lid.

  The present inventors have found that the above configuration can achieve both sealing performance and easy opening performance. Here, in the present invention, “opening” means that a part of the lid member is peeled from the lidded container to expose the container storage and / or contents to the outside air. That is, “easy opening” means a property that a part of the lid can be easily peeled off from the lidded container and the container storage and / or contents can be exposed to the outside air. The opening mechanism of the container with a lid of this invention is demonstrated with reference to FIG.

  When the tongue piece portion (202) and the tab portion (120) of the lidded container shown in FIG. 2 (a) are picked and bent, as shown in FIG. 2 (b), the tongue piece portion (202) of the container and the flange portion. (204) is separated. When the tongue piece portion (202) and the tab portion (120) are further pulled up, the lid material is peeled off from the peeling trigger seal portion (404) to reach the peeling trigger inner layer half cut line (102a), and FIG. ), The outer layer (106) is peeled from the inner layer (102) with the inner layer half cut line (102a) for peeling trigger as a boundary. Therefore, in the region closer to the storage part than the inner layer half cut line (102a) for peeling trigger, the outer layer (106) is peeled from the inner layer (102) even if the storage part peripheral seal part (402) is strongly sealed. Can be made.

  Further, when the peeling is further advanced, the inner layer (102) and the optional easily peelable layer (104) are separated following the outer layer (106) in the region where the opening forming half-cut line (102b) is formed. As shown in FIG. 2 (d), an opening (102b ′) is formed, so that the container housing part (206) and / or the contents (300) can be exposed to the outside air.

  Accordingly, the above-described configuration of the present invention, in particular, the inner layer half cut line for triggering the peeling of the lid material, is present on the side of the housing portion with respect to the folding line of the container, so that the lid material is sealed by the housing periphery seal portion. The lid can be easily opened by realizing the above-mentioned peeling mechanism while firmly sealing and fixing the tab part of the lid to the tongue piece of the container by the peeling trigger sealing part. It is possible to obtain a container with a lid that has both properties.

  Although not shown, if the inner layer half-cut line for triggering the peeling of the lid material is present on the folding line of the container, the tongue piece portion and the tab portion of the lidded container are picked and bent. When separated, the outer layer is peeled off from the inner layer at the boundary between the broken line of the container and the inner layer half-cut line for peeling the cover material, and an opening is formed as described above. Therefore, also in this case, the lid member can be easily opened while strengthening the storage portion peripheral seal portion.

  Below, two seal parts in a container with a lid of the present invention are explained.

<Storage part peripheral seal part>
The storage part peripheral seal part is a seal part formed on the peripheral part of the storage part of the container. This seal part can be formed by heat sealing, for example.

  The storage portion peripheral seal portion may be formed on a partial region of the flange portion of the container. For example, as shown in FIG. 1A, the storage portion peripheral seal portion (402) surrounds the storage portion (206) on a partial region of the flange portion (204) of the container (200). It may be formed in a strip shape.

<Seal part for peeling trigger>
The peeling trigger seal portion is a seal portion formed so as to cross the peeling trigger inner layer half-cut line. With this seal portion, the inner layer of the lid material can be fixed on the flange portion of the container in the region between the folding line of the container and the inner layer half cut for peeling the cover material.

  Furthermore, the peeling trigger seal portion induces a force for opening the lid material when the lid material is opened until the inner layer half cut line for the peeling trigger is reached, thereby moving the outer layer of the lid material from the inner layer of the lid material. It can be made to peel. This seal part can be formed by heat sealing, for example. The peeling trigger seal portion may be formed continuously with the storage portion peripheral seal portion, or may be formed independently of the storage portion peripheral seal portion.

  As shown in FIG. 3 (d), the peeling trigger seal portion (404) is integrated with the storage portion peripheral seal portion (402), and the length and lid of the folding break line (208) of the container (200). It may be formed so as to reach the folding line (208) of the container (200) including all of the inner layer half cut line (102a) for peeling trigger of the material (100), as shown in FIG. As shown in FIG. 3 (f), the entire tongue piece (202) of the container (200) may be further formed, or as shown in FIG. It may be formed as follows.

  However, the peeling trigger seal portion is preferably formed in one or a plurality of strips extending between the main body portion of the lid member and the tab portion from the viewpoint of providing stable easy opening. This will be described below with reference to FIG. In this figure, the area | region of the periphery of a bending break line (208) and the inner layer half cut line (102a) for peeling triggers is expanded and shown.

  When sealing a lid with an inner layer half-cut line for peeling trigger to the flange part of a container having a bent fracture line, the position of the bent line and the inner layer half-cut line for peeling trigger coincide with each other due to the accuracy of the sealing machine. It is difficult to do so, and a relative positional shift may occur between the folding line and the inner layer half-cut line for triggering the peeling of the lid.

  If the container and the lid are sealed in a state where the folding break line and the inner layer half cut line for peeling trigger are separated so that they are separated in the opening direction, the folding break line and the inner layer half cut line for peeling trigger are separated. The area between them widens. As a result, for example, as shown in FIG. 4A, when the peeling trigger seal portion (404) is formed so as to surround the entire peeling trigger inner layer half-cut line (102a), As shown in FIG. 4B, the area of the region (404 ′) between the bending break line (208) of the peeling trigger seal portion (404) and the peeling trigger inner layer half-cut line (102a) increases. It will be. As a result, the peel strength required for peeling the inner layer of the lid from the flange portion of the container and reaching the inner layer half cut line (102a) for peeling trigger is greatly increased.

  On the other hand, as shown in FIG. 4 (c), the peeling trigger seal portion (404) has one or more strips extending between the main body portion (110) and the tab portion (120) of the lid. 4 (d), in a state where a deviation has occurred so that the position of the folding break line (208) and the peeling trigger inner layer half cut line (102a) are separated from each other. Even if the container and the lid are sealed, the area of the region (404 ′) between the bending break line (208) and the inner layer half cut line (102a) for the separation trigger of the separation trigger seal portion (404) is as follows. Since it does not increase greatly compared to the case of FIG. 4B, the increase in the peel strength due to the deviation can be suppressed.

  Furthermore, the peeling trigger seal portion is formed in one or more strips extending between the main body portion of the lid and the tab portion, so that the inner layer half cut line for the peeling trigger is changed from the folding break line. Since the seal area during the arrival of the cover becomes narrow, the opening can be formed by delamination of the lid member with a weak force.

  For the above reason, the peeling trigger seal portion is preferably formed in one or a plurality of strips extending between the main body portion of the lid member and the tab portion from the viewpoint of providing stable easy-openability. .

  As a preferable mode, for example, as shown in FIG. 1 (a), a stripping trigger seal portion (404) is formed in two strips, and as shown in FIG. 3 (a), a stripping trigger. An embodiment in which the sealing portion (404) is formed in a single band shape is exemplified.

  Further, as a modification of the embodiment of FIG. 3 (a), as shown in FIG. 3 (b), the peeling trigger seal portion (404) forms a U shape, and as shown in FIG. 3 (c). The U-shaped peeling trigger seal portion (404) may be continuous with the storage portion peripheral seal portion (402).

  From the viewpoint of fixing the inner layer satisfactorily, the sealing part for peeling trigger crosses 5% or more, 10% or more, 15% or more, or 20% or more of the length of the inner half-cut line for peeling trigger. It is preferable that 80% or less, 70% or less, 60% or less, 50% or less, or 40% or less of the length of the inner layer half-cut line for peeling trigger narrows the formation region of the seal portion. From the viewpoint of reducing the peel strength between the inner layer of the cover material and the flange portion of the container in the region between the bent line of the container and the inner layer half-cut line for peeling the cover material. .

  The peeling trigger seal portion is formed so as to further cross the folding line of the container, so that the inner layer of the lid is fixed to the tongue portion of the container, whereby the tab portion of the lid and the container This is preferable from the viewpoint of preventing the tongue piece portion from separating and the tongue piece portion from falling off. In this case, the sealing portion for peeling trigger crosses 5% or more, 10% or more, 15% or more, or 20% or more of the length of the bending break line, so that the inner layer of the lid material is used as the tongue of the container. It is preferable from the viewpoint of satisfactorily fixing to one part. Further, the peeling trigger seal portion may cross 80% or less, 70% or less, 60% or less, 50% or less, or 40% or less of the length of the bent fracture line.

  Below, the container, the content, and cover material which comprise the container with a lid | cover of this invention are demonstrated.

<container>
The container includes a storage portion, a flange portion at the periphery of the storage portion, and a tongue piece portion continuous with the flange portion. The flange part and the tongue piece part are demarcated by the bending break line.

{Storage section}
A storage part is a part in which the contents are stored. The shape of this portion can be, for example, a truncated cone, a polygonal truncated cone, a rectangular parallelepiped, a cube, or the like.

{Flange part}
The flange portion is a peripheral portion of the container storage portion and may be a bowl-shaped portion.

{Tongue piece}
The tongue piece portion is a region continuous with the flange portion.

{Bending line}
The bending break line is a portion that demarcates the boundary between the flange portion and the tongue piece portion. By bending and breaking this portion, the tongue piece can be separated from the flange.

  The bending break line can be formed, for example, by providing a notch from below the flange portion of the container. This notch may be, for example, a solid line or a dotted line.

<Contents>
The contents are stored in a container. Contents include concentrated liquid beverages such as black tea, Japanese tea, coffee, liquid seasonings such as milk and gum syrup, semi-solid seasonings such as jam and butter, liquid sanitary products such as mouthwashes, medical instruments, snacks, etc. Can be.

<Cover: Layer structure>
The lid member is composed of a laminate having an outer layer and an inner layer, and the outer layer can be peeled from the inner layer.

  Below, the layer structure of a cover material is demonstrated.

{Laminate}
The lid material of the present invention is composed of a laminate having an outer layer and an inner layer, and 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.

  Lamination of the layers constituting the laminate can be performed, for example, by extrusion lamination such as sand lamination or back lamination, or dry lamination.

  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.

(Outer layer)
The outer layer of the lid member may be a layer that becomes the outermost layer of the lidded container when the lid member is joined to the container. Moreover, an outer layer can be laminated | stacked on the inner layer of a cover material, and can be peeled from an inner layer after that.

  For example, the outer layer is laminated on the inner layer to become the outermost layer when a container with a lid is formed. In addition, for example, the tongue piece portion and the tab portion of the container may be picked together, the tongue piece portion may be broken by the bending break line of the container, and the tongue layer portion and the tab portion may be pulled up to peel the outer layer from the inner layer. it can.

  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.

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

  For example, as a film, polyethylene terephthalate (PET) film, low density polyethylene (LDPE) film, medium density polyethylene film (MDPE), high density polyethylene (HDPE) film, linear low density polyethylene (LLDPE) film, polypropylene (PP ) Films, nylon (Ny) films 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 is a layer that can be the innermost layer when the lid is joined 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 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 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 (PET) film, low density polyethylene (LDPE) film, medium density polyethylene (MDPE) film, high density polyethylene (HDPE) film, linear low density polyethylene (LLDPE) film, polypropylene (PP ) Films, nylon (Ny) films 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.

  The inner layer may include a resin layer, an adhesive layer, a metal foil layer, an inorganic vapor deposition film layer, and the like other than those described above. 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 according to 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 acetate Resins such as vinyl copolymers may be used. 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.

  As the sealant layer, it is preferable to use a layer having a composition close to the surface of the flange portion of the container in order to ensure the sealing performance between the lid and the container. Specifically, when the flange portion of the container is made of polypropylene, it is preferable to use unstretched polypropylene as the sealant layer.

  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 polyethylene resin and polypropylene 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 40 μm or less, 30 μm or less, or 25 μm or less in order to achieve both adhesion and peelability with the layer to be peeled. It's okay.

  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 the inner layer.

  The inner layer half cut line is engraved with a depth penetrating 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 layer is disposed between the outer layer and the inner layer of the lid member, the inner layer half cut line can be formed from the surface of the inner layer to a depth reaching the easily peelable layer. In this case, the outer layer can be peeled at the interface between the inner layer and the easily peelable layer. Moreover, the inner layer half cut line can be formed from the surface of the inner layer to a depth penetrating the easily peelable layer. In this case, the outer layer can be peeled off at the interface between the outer layer and the easily peelable 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 carved from the outer layer side. The outer layer half-cut line can be, for example, a half-cut line for defining a region to be peeled off.

(Inner half cut line)
The inner layer half cut line is a half cut line carved from the inner layer side. For example, the inner layer half-cut line may be a peeling trigger inner layer half-cut line that becomes a peeling trigger, or an opening forming inner layer half-cut line that defines an opening region. These inner layer half cut lines will be described below.

  Here, the “opening” means a configuration capable of discharging the internal liquid, particularly concentrated liquid food, or allowing the inside and outside air to circulate. In particular, in the present invention, the opening forming inner layer half This is the area defined in the inner layer by the cut line.

  The inner layer half-cut line for peeling trigger is an inner layer half-cut line serving as a trigger for peeling the outer layer from the inner layer.

  It is preferable that the inner layer half-cut line for peeling trigger is formed substantially parallel to the bending break line from the viewpoint of easy opening of the lid member. In addition, from the viewpoint of increasing the allowable range of deviation of the formation position of the peeling trigger inner layer half-cut line, a plurality of peeling trigger inner layer half-cut lines are formed substantially parallel to the bending break line. preferable.

  Here, in the present specification, “substantially parallel” means that an angle error with respect to perfect parallelism is within 10 °, within 5 °, within 3 °, or within 1 °.

  The opening forming inner layer half cut line is a half cut line for defining a region to be an opening when the outer layer is peeled from the inner layer.

  As shown in FIG. 1A, the opening forming inner layer half-cut line (102b) is formed so as to form an opening in a partial region of the main body portion, and the periphery of the storage portion in the main body portion. It exists in the area | region enclosed by the seal | sticker part (402). The inner layer half-cut line (102b) for opening formation may be formed near the inner edge of the flange portion (204) as shown in FIG. 5 (a), or as shown in FIG. 5 (b). It may be formed on the part (204).

<Cover material: Configuration in the surface direction>
The lid member of the present invention may have an outer peripheral shape that is substantially the same as the outer peripheral shape of the flange portion and tongue piece portion of the container. The outer peripheral shape of the lid member can be formed, for example, by sealing the laminated body constituting the lid member to the container and fully cutting the laminated body according to the outer peripheral shape of the flange portion and the tongue piece portion of the container. Here, “substantially the same” means that the positional deviation between the outer peripheral shape of the flange portion and tongue piece portion of the container and the outer peripheral shape of the lid material is within 2 mm and within 1 mm when the container and the lid material are joined. Or within 0.5 mm. This shift includes an inward shift with respect to the outer peripheral shape of the flange portion and the tongue piece portion of the container, and an outward shift with respect to the outer peripheral shape.

  Moreover, the lid | cover material of this invention comprises the tab part which protrudes from the main-body part so that it may correspond to the main-body part and the tongue piece part of a container. The boundary between the main body portion and the tab portion is defined by an inner layer half cut line for peeling trigger.

{Body part}
The body portion may be present to correspond to the flange portion of the container.

  An opening forming inner layer half cut line is formed in the main body portion so as to form an opening in a partial region of the main body portion.

{Tab part}
The tab portion protrudes from the main body portion so as to correspond to the tongue piece portion of the container. As already mentioned, the opening mechanism mentioned in FIG. 2 can be realized by pinching the tab part together with the tongue piece part, bending it, and pulling it up.

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

《Preparation of laminate for lid material》
As a laminate for the lid material, a laminate having the following constitution was produced (where “//” represents a dry laminate adhesive):
PET1 (12 μm) // AL (7 μm) // PET2 (12 μm) // peeling varnish / PET3 (12 μm) // CPP (20 μm).

The following materials were used for each layer in the above laminated structure:
PET1 (thickness: 12 μm): E5100, Toyobo Co., Ltd. Aluminum foil (thickness: 7 μm): 1N30, Toyo Aluminum Co., Ltd. PET2 (thickness: 12 μm): PETB, Unitika PET3 (thickness: 12 μm): E5100, Toyobo Co., Ltd. Unstretched polypropylene (CPP) (thickness: 20 μm): FHK2, Futamura Chemical Co., Ltd. Dry laminate adhesive: Takelac A-525 / Takenate A-50, Mitsui Chemicals Peeling varnish: Polycoat P-91, DIC Graphics

  Specifically, a laminate for a lid material was produced as follows:

  1. A release varnish “Polycoat P-91” as an easily peelable layer was printed in a mesh shape on the untreated corona surface of PET3 “E5100” to prepare member a (peeling varnish / PET3 (12 μm)).

2. Using a dry laminator, the amount of dry laminate adhesive applied was set at 3 g / m ² dry weight, PET1 “E5100” and aluminum foil “1N30”, dry laminate adhesive “Takelac A-525 / Takenate A-50” To produce a member b (PET1 (12 μm) // AL (7 μm)).

3. Using a dry laminator, the dry laminate adhesive application amount was set to 3 g / m ² dry weight, the aluminum foil side of the member b and PET2 “PETB”, and the dry laminate adhesive “Takelac A-525 / Takenate A-” 50 ”to prepare a member c (PET1 (12 μm) // AL (7 μm) // PET2 (12 μm)) as an outer layer.

4). Using a dry laminator, the dry laminate adhesive application amount was set to 3 g / m ² dry weight, and the dry laminate adhesive “Takelac A-525 / Takenate A-50” was applied to the PET2 side of the member c. The member d (PET1 (12 μm) // AL (7 μm) // PET2 (12 μm) // Peeling varnish / PET3 (12 μm)) was prepared by bonding the member a to the peeling varnish side.

5. Using a dry laminator, the dry laminating adhesive application amount was set to 3 g / m ² dry weight, and the CPP “FHK2” as the sealant layer on the PET3 side of the member d and the dry laminating adhesive “Takelac A-525 / Bonded via “Takenate A-50” and laminated body for lid (PET1 (12 μm) // AL (7 μm) // PET2 (12 μm) // peeling varnish / PET3 (12 μm) // CPP (20 μm) ) Was produced. In the present invention, a laminate of PET3 (12 μm) // CPP (20 μm) corresponds to the inner layer.

<< Production of containers with lids >>
<Comparative example 1>
Using a rotary die cutter, peeling inner layer half cut line and opening formation at a depth that penetrates PET3 “E5100” from the CPP side of the above laminate for lid material and penetrates the easy peelable layer that is the peeling interface An inner layer half cut line was engraved.

  The lid for the comparative example 1 was heat-sealed into a container having a lid outer diameter of 45 mm, a flange width of 4.5 mm, and a capacity of 20 ml, and punched into the outer peripheral shape of the container. A container was prepared.

  In the lidded container of Comparative Example 1, the peeling trigger seal portion (404) and the storage portion peripheral seal portion (402) are integrally formed over the entire flange portion (204), and this seal portion (402 404) and the inner layer half cut line (102a) for peeling trigger and the inner layer half cut line (102b) for opening formation are as shown in FIG. 6 (a).

<Examples 1 to 5 and Comparative Examples 2 and 3>
As shown in FIGS. 6B to 6D, the inner layer half-cut line for peeling trigger is changed by changing the positional relationship between the inner layer half-cut line for peeling trigger (102a) and the bending break line (208). Except having carved (102a), it carried out similarly to the comparative example 1, and produced the container with a lid of Examples 1-3.

<Examples 1 to 5 and Comparative Examples 2 and 3>
As shown in FIGS. 6 (e) to 6 (h), Comparative Example 1 and Examples 1 to 3 except that the peeling trigger seal portion (404) and the storage portion peripheral seal portion (402) are formed in a band shape. Similarly, the lidded containers of Comparative Example 2, Examples 4 and 5, and Comparative Example 3 were produced.

<Evaluation>
The produced container with a lid was evaluated. Specifically, the tab portion of the lid member and the tongue portion of the container are collectively picked and bent to separate the tongue portion of the container from the flange portion of the container, and the tab portion of the lid member and the tongue portion of the container Was lifted to open the lidded container. During opening, the easy-openability was sensory evaluated and whether the outer layer was peeled off from the inner layer was visually observed.

  The results are shown in Table 1.

In Table 1, “crossing ratio” is calculated as follows.
Crossing rate (%) = (length of the inner layer half cut line for peeling trigger where the seal portion crosses) ÷ (length of inner layer half cut line for peeling trigger) × 100

The evaluation criteria for “easy opening” were as follows.
A: Opened very easily.
○: Opened easily.
Δ: Opening was slightly difficult.
X: Opening was very difficult.

  From Table 1, the inner layer half-cut line for peeling trigger exists on the folding break line or closer to the storage part than the folding break line, and the seal for peeling trigger crosses the inner layer half cut line for peeling trigger Since the lidded containers of Examples 1 to 5 formed as described above can realize the peeling mechanism referred to in FIG. 2, good easy peelability can be realized. On the other hand, in the containers with lids of Comparative Examples 1 to 3, when the tab portion and the tongue piece portion were lifted, the lid material turned up, and as a result, the outer layer was not peeled at the interface with the easily peelable layer, Easy peelability was not obtained.

  In addition, when the lidded containers of Examples 1 to 3 in which the seal part is formed as a whole and the containers with lids in Examples 4 and 5 in which the seal part is formed in a band shape are compared, the inner layer half cut line for peeling trigger is folded. Example in which no significant difference was found between Examples 1 and 4 existing on the curved break line, but the inner layer half-cut line for peeling trigger was present on the storage part side from the folded break line There was a significant difference in easy-openability between 2 and 3 and Example 5. From this, it can be recognized that when the seal portion is formed in a band shape, the allowable range of deviation of the formation position of the folding line and / or the inner layer half cut line for peeling trigger increases.

DESCRIPTION OF SYMBOLS 100 Cover material 102 Inner layer 102a Inner layer half cut line 102b for peeling trigger 102b Inner layer half cut line 102b 'opening for opening formation 104 Easy peelable layer 106 Outer layer 110 Main body part 120 Tab part 200 Container 202 Tongue piece part 204 Flange part 206 Storage part 208 Bending line 300 Contents 400 Container with lid 402 Storage section peripheral seal section 404, 404 'Peeling trigger seal section

Claims (7)

A container with a lid, comprising a container, contents stored in the container, and a lid material sealing the container,
(I) The container includes a storage part, a flange part at a peripheral edge of the storage part, and a tongue piece part protruding from the flange part,
A boundary between the flange portion and the tongue piece portion of the container is defined by a folding line;
(Ii) The lid is composed of a laminate having an outer layer and an inner layer, and the outer layer is peelable from the inner layer,
The lid member has an outer peripheral shape substantially the same as the outer peripheral shape of the flange portion and the tongue piece portion of the container;
The lid member includes a main body portion and a tab portion protruding from the main body portion so as to correspond to the tongue piece portion;
An inner layer half cut line for opening formation is formed in the lid material so as to form an opening in a partial region of the main body portion of the lid material,
The boundary between the main body portion of the lid material and the tab portion is defined by an inner layer half cut line for peeling off the lid material,
(Iii) The container and the lid member are
A seal for sealing a peeling trigger formed across the inner half-cut line for peeling trigger of the lid, and a seal for sealing the peripheral edge of the casing formed on the peripheral edge of the container of the container; Fused,
(Iv) The opening forming inner layer half-cut line of the lid member is present in a region of the main body portion of the lid member surrounded by the storage portion peripheral seal portion, and (v ) The inner layer half-cut line for peeling trigger of the lid material is present on the folding part line of the container or on the storage part side of the folding line of the container,
Container with lid.   The container with a lid according to claim 1, wherein the peeling trigger sealing portion of the lid material crosses 5% to 80% of the length of the peeling trigger inner layer half-cut line.   The lidded container according to claim 1 or 2, wherein the peeling trigger seal portion of the lid material is formed so as to further traverse the bending break line of the container.   The container with a lid according to claim 3, wherein the peeling trigger seal portion of the lid crosses 5% to 80% of the length of the bent fracture line of the container.   The said peeling trigger seal part of the said cover material is formed in the 1 or several strip | belt shape extended between the said main-body part and the said tab part, It is any one of Claims 1-4. Container with lid.   The container with a lid according to any one of claims 1 to 5, wherein the opening inner layer half cut line of the lid member is formed at a position corresponding to the flange portion of the container.   The container with a lid according to any one of claims 1 to 6, wherein a plurality of inner layer half-cut lines for peeling trigger of the lid member are formed substantially in parallel.

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