JP2013141984A - Lid member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid member which can easily exhibit dead holding property of the lid member, which is required to facilitate the unsealing and resealing motions performed at eating, in the lid member which is used to repeat unsealing and resealing at eating.SOLUTION: An upper sheet constituting the lid member is constituted to be separable from a lower sheet at the interfacial surface between the upper sheet and the lower sheet. At the inter-layer section between the upper sheet and the lower sheet, the lid member includes at least an aluminum foil, and a stretched plastic film on one side of the aluminum foil. At least on one layer constituting the lid body, one or more cut processes in a direction vertically crossing the unsealing direction are applied for the lid member.

Description

  The present invention relates to a lid for a container that seals an article, and more particularly to a lid that needs to be cooked with water or hot water contained therein during use.

2. Description of the Related Art Conventionally, lids that are heat-sealed and sealed in flanged containers and are opened by peeling (peeling) from pull tabs at the ends have been widely marketed as products for various contents.
Depending on the purpose of the product and how the consumer is using such a lid, the lid is not completely peeled off and removed during use, but temporarily stopped in the middle of the peel and hot water is poured from the opening and resealed. Or used in products that are resealed in the middle of eating and drinking (both are not sealed). Specific examples are the former for instant noodles in cups, soup in cups, and the latter for some cups. Including snack snacks.

Furthermore, instant food containers such as fried noodles and spaghetti are known as containers having a structure for discharging only liquids such as water and hot water, which are put inside during use, to the outside through discharge holes.
When eating these instant foods, it is necessary to pour hot water and quickly drain the hot water from the container after a predetermined time (time for making the instant foods edible).

As an example of such an instant food container, a container described in Patent Document 1 is known. The main body of the container is molded from a foamed polystyrene resin (PS) molded container, a polypropylene resin (PP) molded container, or a laminated material obtained by laminating a polystyrene resin (PS) sheet and a polyethylene terephthalate resin (PET) sheet. .
This container body contains noodles, utensils, sauces, etc., and a lid made of a laminated sheet having plastic is adhered and sealed by heat sealing etc., and the whole is shrink-wrapped with a shrink film and stored in this packaging form Is done.

The above-mentioned lid capable of draining water is composed of an upper sheet disposed on the container surface side when sealed and a lower sheet forming the lower layer thereof. This lower sheet is referred to as a composite sheet made of a composite layer in Patent Document 1, and is closely attached to the periphery of the opening of the container main body.
An easy release layer is formed by applying an easy release agent to a part of the arc-shaped region between the upper sheet and the lower sheet. For this reason, the lid member is divided into an easy-peeling region where the easy-peeling layer is formed and an adhesive (non-peeling) region other than that in the plan view.

  On the upper sheet, perforations are formed in a straight line along a straight line portion of the arc-shaped region of the easily peelable layer. In the easy peeling area of the lower sheet, a plurality of hot water cut holes by cutting are provided so as to penetrate the front and back. Further, a hot water cutting pull tab is extended from a part of the end of the arc-shaped region of the upper sheet so as to protrude outward. On the other hand, an opening pull tab used to peel off the lid from the container body is extended in a part of the adhesion region so as to protrude outward.

  For this reason, at the time of eating, the user lifts the opening pull tab, partially opens the lid, and pours hot water into the container body. Thereafter, the opening pull tab is closed and locked to bend the edge of the container body, and waits for cooking with hot water such as hot water reconstitution. Thereafter, the pulling tab for hot water cutting is pulled up from the lower sheet, the easy peeling area of the lower sheet is opened, and the arc-shaped area of the pulled up upper sheet is cut off from the perforation. Thereby, a plurality of hot water cutting holes appear in the easy peeling region of the lower sheet. Therefore, the container is tilted to discharge the hot water after cooking from the hot water hole. When the hot water draining is finished, the pull tab for opening is pulled up again, and the lid is separated from the container main body, so that eating is possible.

  Further, a lid material described in Patent Document 2 has been proposed in order to eliminate the trouble of partially providing an easy peeling layer. This cover material has a base material in which a hot water cut hole is formed in a region offset to one edge and a surface material covering the base material, and a surface covering the hot water cut hole of the base material. A separation line is formed between one edge of the material and the other part of the surface material, and the edge of the surface material on the side of the hot water hole extends outward from this separation line to form a peeling tab In the hot-water lid material for instant foods, the base material and the surface material are laminated via an easily peelable laminated film composed of a first layer and a second layer that can be peeled and laminated together, It is characterized in that a hot water cutting hole is formed through the base material and the easily peelable laminated film, and the adhesive strength between the base material and the surface material is spread over the entire product and is laminated with a peelable strength. Therefore, the position accuracy of the hot water cut-out part arranged by half-cut processing after lamination is Warez, it is possible to peel off the surface material and the substrate.

As described above, lift the opening pull tab when eating, partially open the lid, inject hot water into the container body, close the opening pull tab and lock it to the container body, and then lower the hot water pull tab. While pulling up from the sheet, the easy peeling area is opened, the arc-shaped area of the upper sheet is cut off from the perforation, and when the hot water draining is finished, the opening pull tab is pulled up again, and the lid is separated from the container body, etc. In the case of a lid material for repeated opening and resealing, it is required to have a property (dead hold property) in which deformation during operation does not immediately return to its original state.
In this case, the dead hold property expressed by the aluminum foil contained in the layer structure of the lid material improves the ease of handling food during eating.

A lid that is sealed by heat sealing to a flanged container and is opened by peeling (peeling) from the pull tab at the end, on the other hand, depending on the handling conditions of the product, the lid and container should not be broken by external force. In some cases, it is necessary to increase the seal (peel) strength.
At that time, if the peel strength becomes excessively strong, when peeling from the flange of the container in order to open the lid, the lid itself may be torn or peeled between unintended layers of the lid.
In particular, the lid of a container such as a cup-made instant fried noodle with a mechanism that causes a hot water cut hole to appear by peeling is easily broken because the peeled portion becomes thin. For example, when the surface material of the hot water hole is partially peeled off on hot water, the base layer is surrounded by the hot water hole as a result of softening of the resin of the easily peelable laminated film due to warming of hot water. May cause peeling errors that fall from the surface material.

As a countermeasure against the above problem, a configuration in which a stretched plastic film having a high breaking strength is added in the vicinity of the aluminum foil layer in the lid member is conceivable. Using the feature that the stretched plastic film has a high breaking strength, it aims to prevent tearing of the lid and peeling between layers.
However, if measures are taken simply by adding a stretched plastic film as described above, the stretched plastic film will be affected by the strain (hardness to bend), and the dead-holding property of the lid will be reduced. There was a problem that would become.

  For this purpose, when opening, pull the opening pull tab, partially open the lid, inject hot water into the container body, close the opening pull tab and lock to the container body, and when the hot water draining is finished, the opening pull tab In a lid material for repeated opening and resealing such that the lid is separated from the container body, the lid in which the stretched plastic film is combined with the structure including the aluminum foil may be given a dead hold property. It was an issue.

JP 2000-203653 A JP 2004-59028 A

  The present invention is intended to solve the above-mentioned problems. The purpose of the present invention is to lift the opening pull tab when eating, partially open the lid, inject hot water into the container body, and then open the opening pull tab. When the lid is closed and locked to the container body, and the hot water draining is finished, the pull tab for opening is pulled up again and the lid is separated from the container body. It is a subject to give dead hold property to the lid | cover with which the stretched plastic film is combined.

The first invention is as described in claim 1,
A cover material that covers the flange formed along the periphery of the opening of the container main body so as to be peelable and has a size substantially equal to the outer shape of the flange, and covers the opening and the flange integrally. And a pull tab that is integrally extended to the lid main body so as to be located outside the flange and is used when the lid main body is separated from the opening,
The lid body and the pull tab have a laminate including at least a lower sheet that has a lower surface releasably attached to a flange, and an upper sheet that includes a paper layer that is laminated on the upper surface of the lower sheet and has the upper surface as a surface of the lid body. In the lid material composed of
The upper sheet is configured to be peelable from the lower sheet at the interface with the lower sheet, and includes at least an aluminum foil and a stretched plastic film on one side thereof between the upper sheet and the lower sheet to constitute a lid body. The lid member is characterized in that at least one layer is cut or cut in a direction perpendicular to the opening direction.

As for 2nd invention as described in claim 2,
A cover material that covers the flange formed along the periphery of the opening of the container main body so as to be peelable and has a size substantially equal to the outer shape of the flange, and covers the opening and the flange integrally. A lid body, a first pull tab that extends integrally with the lid body so as to be positioned outside the flange, and is used to separate the lid body from the opening, and extends integrally with the lid body; A second pull tab used when a hot water drain hole for discharging liquid from the container body appears on the lid body;
The lid main body, the first pull tab, and the second pull tab are at least a lower sheet that has a lower surface that is detachably attached to the flange, and an upper sheet that is laminated on the upper surface of the lower sheet and has the upper surface as the surface of the lid main body. For starting peeling, which penetrates the lower sheet from the lower surface of the lower sheet so as to connect the two points of the outer edge of the lower sheet located on both sides of the second pull tab across the root part of the second pull tab. A break is formed,
With the peripheral edge on the first pull tab side as a starting point from the peeling start cut, a half-cut for forming a closed hot water cut portion having a predetermined shape penetrating the upper sheet from the upper surface of the upper sheet is formed, and the peeling start cut And a plurality of hot water hole forming half cuts having a desired shape and a desired arrangement are formed in a region surrounded by the closed hot water cut portion forming half cut of the predetermined shape,
The partial region of the upper sheet in a state where the portion of the lower sheet to which the hot water cut hole forming half cut is attached is attached to the partial region of the upper sheet by the peeling operation of the second pull tab. In the lid material configured to be peelable from the lower sheet,
The upper sheet is configured to be peelable from the lower sheet at the interface with the lower sheet, and includes at least an aluminum foil and a stretched plastic film on one side thereof between the upper sheet and the lower sheet to constitute a lid body. The lid member is characterized in that at least one layer is cut or cut in a direction perpendicular to the opening direction.

  According to a third aspect of the present invention, the one or more cuts in the direction perpendicular to the opening direction are in the thickness direction of the lid body, the paper layer, the upper sheet including the paper layer, and the stretched plastic 3. The lid according to claim 1, wherein the cover material has a depth that penetrates all or half of the film, the lower sheet including the sealant layer, and the sealant layer.

  According to a fourth aspect of the present invention, as set forth in claim 4, the one or more cuts in a direction perpendicular to the opening direction are arranged linearly in the width direction of the lid body in the full width or the partial width. The lid member according to any one of claims 1 to 3, wherein the lid member is an aggregate of cuts having a certain angle.

According to the lid material of the first invention, the lid body and the pull tab are at least a lower sheet whose bottom surface is detachably adhered to the flange, and a paper layer that is laminated on the upper surface of the lower sheet and has the upper surface as the surface of the lid body The upper sheet is configured to be peelable from the lower sheet at the interface between the upper sheet and the lower sheet, and between the upper sheet and the lower sheet. And at least one aluminum foil and a stretched plastic film on one side thereof, and at least one layer constituting the lid body is subjected to one or more cuts in a direction perpendicular to the opening direction, thereby opening at the time of eating. After lifting the pull tab and partially opening the lid, injecting hot water into the container body, close the opening pull tab and lock it onto the container body. In the lid material for use that repeats opening and resealing, such as separating the lid from the container body, even if the lid includes a stretched plastic film combined with an aluminum foil, the stretched plastic film In addition to the effect of preventing material destruction, it has become possible to provide shape maintenance that complements the dead hold property of the aluminum foil hindered by the stretched plastic film.
Due to the material destruction prevention effect of the stretched plastic film, it is possible to prevent the lid itself from being torn or peeling between unintended layers of the lid when peeling from the flange of the container to open the lid.

  According to the lid material of the second invention, the lid of a container such as instant fried noodles with a cup having a mechanism that expresses a hot water cut-off hole by peeling especially easily breaks because the peeled portion becomes thin. Even in the case of a simple lid, the dead hold property of the lid can be ensured without causing inconveniences such as tearing of the lid and unintentional delamination, thereby simplifying the user's workability.

  According to the lid material of the third invention, one or more cuts in the direction perpendicular to the opening direction are in the thickness direction of the lid body, a paper layer, an upper sheet including the paper layer, a stretched plastic film, Dead hold of the necessary lid material in a state in which the preservability of the contents during storage before opening is ensured by having a depth that penetrates any part of the lower sheet or sealant layer including the sealant layer or through the entire layer. It became possible to express sex.

  According to the lid material of the fourth aspect of the invention, one or more cuts in a direction perpendicular to the opening direction are linearly arranged in the width direction of the lid body in the full width or the partial width. By being an assembly of cuts having a certain angle, the degree of freedom of processing and design is increased within the allowable range of the length, number, or shape of the cut processing necessary for expressing the dead hold property.

As described above, according to the lid material of the present invention, the lid body is subjected to one or more cuts in the direction perpendicular to the opening direction, thereby performing the opening and resealing operations performed during eating. It is possible to provide a container with a lid that can easily exhibit the dead hold property of the lid necessary for facilitating the operation.

The shape example (top view) of the cutting process of the lid | cover material of this invention. (A) Lid partial width straight line, (B) Lid full width straight line, (C) Lid full width broken line, (D) Lid full width C perforation. The shape example (sectional drawing) of the cutting process of the cover material of this invention. (A) In the middle or all layers of the paper layer, (B) In the middle or all layers of the stretched plastic film layer, (C) In the middle or all layers of the sealant layer. An example of the lid | cover material of this invention. (A) Cross section of layer structure, (B) Top shape. An example of the lid | cover material of this invention. (A) Cross section of layer structure, (B) Top shape.

An example of an embodiment of a lid according to the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 is a top view of a shape example of the cutting process of the lid material of the present invention. Fig. 1 (A) shows an example of a linear cut with the width of the cut process excluding the peripheral edge of the lid, and Fig. 1 (B) shows a straight cut with the cut process length of the full width of the lid. FIG. 1C shows an example of a cut in which the length of the cut process is the entire width of the lid and is a broken line shape, and FIG. Examples of the cuts are shown.

  FIG. 2 is a cross-sectional view in the opening direction (X-X ′) in FIG. 1 of a shape example of the cutting process of the lid material of the present invention. FIG. 2A shows an example in which the depth of the cut process is in the middle or all layers of the paper layer of the lid, and FIG. 2B shows the case in which the depth of the cut process is in the middle or all layers of the stretched plastic film layer. FIG. 2C shows an example of the case where the depth of the cutting process is in the middle of the sealant layer or the entire layer. In FIG. 2A, the cross section of the container is also shown in order to express the relationship between the lid and the container, but it is omitted in FIGS. 2B and 2C.

  As shown in FIGS. 1 and 2, the lid material of the present invention is a lid material (41) that covers the flange (42) formed along the edge of the opening of the container body (40) in a peelable manner. A sheet-like lid body having a size approximately equal to the outer diameter of the flange (42) and integrally covering the opening and the flange (42), and a lid so as to be positioned outside the flange (42). A pull tab (43) is provided that extends integrally with the main body and is used when the lid main body is separated from the opening, and at least the lower surface of the lid main body and the pull tab (43) are detachably adhered to the flange (42). In a lid member (41) comprising a laminate comprising a lower sheet (52) and an upper sheet (51) including a paper layer laminated on the upper surface of the lower sheet and having the upper surface as the surface of the lid body , Between the upper sheet (51) and the lower sheet (52), At least one aluminum foil (62) and stretched plastic films (61), (63) on one side thereof, and one or more directions perpendicular to the opening direction (XX ′) on the lid body (41) It is the lid | cover material to which the cutting process (10) is given.

  One or more cutting processes (10) in a direction perpendicular to the opening direction (XX ′) are in the thickness direction of the lid body, and are a paper layer (60) and an upper sheet (51) including the paper layer. The depth penetrates through the stretched plastic films (61) and (63), the lower sheet (52) including the sealant layer, and the sealant layer (64) or partially. The position in the depth direction of these cutting processes can be appropriately selected within the range of necessary physical properties as long as it does not penetrate the aluminum foil necessary for the development of the dead hold property.

One or more cuts (10) in a direction perpendicular to the opening direction (XX ′) are fixed in a width direction of the lid body and arranged linearly with a full width or a partial width. It is a collection of cuts having an angle. The shape of each individual cut is appropriately selected depending on the required dead hold property, ease of processing, and appearance.
Figure 1 shows that the cut length is a straight cut with the width of the portion excluding the peripheral edge of the lid, the length is a straight cut with the full width of the lid, the length is a cut with a broken line with the full width of the lid, Although only the example of the C-shaped perforated cut with the full width of the lid is shown, the shape of the cut processing that can be used in the present invention is not limited to these.

As a simple layer structure of the lid material of the present invention, the upper sheet shown in FIG. 2 is paper (60) / stretched plastic film (61), and the lower sheet is an aluminum foil (62) / sealant (64). The structure laminated | stacked through (not shown) is mentioned. The stretched plastic film may have a configuration (stretched plastic film (63) in FIG. 2) disposed between the aluminum foil (62) and the sealant (64).

The paper (60) used on the seat of the lid of the present invention, the paper alone basis weight 75g / m ² ~150g / m ² about one-sided art paper or single-sided coated paper, quality paper, or the like. Either a single paper or a laminate of paper and a plastic film may be used, and a peeling mechanism may be provided between the layers. Further, the surface of the paper is usually subjected to printing necessary as a final product, protective varnish, or the like.

  When an aluminum foil having a thickness of about 5 μm or more and 15 μm or less is used as the aluminum foil constituting the lower sheet, light shielding properties are sufficiently secured in addition to gas barrier properties. In particular, when a soft aluminum foil is used, the deadfold property is improved when the container is once opened and poured with hot water and when the opening is resealed. When the thickness of the aluminum foil is less than 5 μm, it is difficult to handle, and the deadfold property is inferior. If the thickness exceeds 15 μm, there is too much waist, which is not preferable and economically inferior.

  As the stretched plastic films (61) and (63), a stretched polyethylene terephthalate resin (PET) film, a stretched polypropylene film (OPP), a stretched nylon film, a stretched polyethylene film (OPE) and the like are used. These plastic films can be used not only as a single film but also as a laminate as required.

  As the sealant layer (64) constituting the innermost surface of the container of the lower sheet (52), a polyolefin-based resin is generally used, specifically, a low density polyethylene, a medium density polyethylene, a linear low density polyethylene, Ethylene resins such as ethylene / vinyl acetate copolymer, ethylene / α olefin copolymer, ethylene-methacrylic acid resin copolymer, blend resin of polyethylene and polybutene, homopolypropylene, propylene / ethylene random copolymer Polypropylene resins such as propylene / ethylene block copolymer and propylene / α-olefin copolymer are used.

  In the method of using the lid material of the present invention shown in FIG. 2, the contents (not shown) are put in the container (40), the flange (42) of the container is covered with the lid material (41), the upper surface of the flange and the lid material The opening pull tab (43) of the container sealed by heat-sealing the sealant (64) is pulled up to the position of the lid material cutting (10) and opened. While the lid is kept open due to dead-holding properties, hot water is poured into the inside of the lid to close the lid, and the opening pull tab (43) is hooked on the end surface of the container (40). When it is removed from the container, the contents can be eaten.

Next, another example of the embodiment of the lid according to the present invention will be described with reference to FIGS. The description will be given mainly using FIG. 3 in order to avoid duplication.
3 and 4 show an example of the lid material of the present invention provided with a hot water cutting mechanism. FIG. 3A shows a cross section of the layer structure, and FIG. 3B shows a top surface of the shape. 3A is a cross-sectional view in the opening direction (XX ′) in FIG. 4A shows a cross section of the layer structure, and FIG. 4B shows a top surface of the shape. FIG. 4A is a cross-sectional view in the opening direction (XX ′) in FIG.

An example of an embodiment of the lid member of the present invention provided with a hot water cutting mechanism is shown in FIG.
The lid material of the present invention is a lid material that is detachably attached to the flange (42) formed along the edge of the opening of the container (40) body as shown in a simplified manner in FIG. A sheet-like lid body having a size substantially equal to the outer shape of the flange (42) and integrally covering the opening and the flange (42), and a lid so as to be positioned outside the flange (42). An opening pull tab (43) extending integrally with the main body and used when separating the lid main body from the opening, and a hot water cutout hole extending integrally with the lid main body and discharging the liquid from the container (40) main body A hot water drain pull tab (45) used when (47a) is caused to appear on the lid body.

The lid body, the first pull tab (opening pull tab) (43), and the second pull tab (hot water pulling tab) (45) are at least a lower sheet that has a lower surface in close contact with the flange (42) in a peelable manner ( 52) and an upper sheet (51) laminated on the upper surface of the lower sheet (52) and having the upper surface as the surface of the lid body, and the base portion of the second pull tab (45) is A separation start cut (48a) penetrating the lower sheet from the lower surface of the lower sheet is formed so as to connect the two points of the outer peripheral edge of the lower sheet located on each of the transverse sides,
Forming a closed hot water cut portion having a predetermined shape that penetrates the upper sheet (51) from the upper surface of the upper sheet (51), starting from the peripheral edge on the first pull tab (43) side from the separation start cut (48a). A half cut (46a) is formed, and a desired area is formed in the region (hot water cut region A) surrounded by the separation start cut (48a) and the closed hot water cut portion forming half cut (46a) of the predetermined shape. A plurality of hot water cut hole forming half cuts (47a) having a shape and a desired arrangement are formed,
By the peeling operation of the second pull tab (45), the portion of the lower sheet (52) provided with the half cut (47a) for forming the hot water cut hole is changed to the portion of the partial region (A) of the upper sheet (51). In the cover material configured to be able to peel the partial area (A) of the upper sheet (51) from the lower sheet (52) in a state of being attached to
The upper sheet (51) is configured to be peelable from the lower sheet (52) at the interface between the upper sheet (52) and at least an aluminum foil between the upper sheet (51) and the lower sheet (52). And at least one layer constituting the lid main body and having one or more cuts in a direction perpendicular to the opening direction.

  This lid member has a broken line shape extending from the surface PET film of the upper sheet of the other region (B) other than the hot water draining region of the lid body to the paper layer and extending 10 mm from the lid end perpendicular to the opening direction. Five cuts are applied.

  In the vicinity of the hot water cutting pull tab (45) shown in FIG. 3, a hot water cutting hole forming half cut (47a) penetrating the lower sheet (52) in the vertical direction for forming the hot water cutting hole (47). Is arranged above the position for separating the hot water cutting pull tab (45), the hot water cutting area (A) including the hot water cutting hole, and the other area (B) including the opening pull tab (43). A hot water cut portion forming half cut (46a), which is a second half cut penetrating the sheet (51) in the vertical direction, is disposed.

  The release varnish (65) applied to the interface between the upper sheet (51) and the lower sheet (52) of the hot water cutting region (A) contains, for example, any one of nitrocellulose, polyamide, and urethane resin as a release agent. It can be formed by applying and drying a solvent-based coating agent containing at least one wax selected from silicone wax, polyester wax and fatty acid amide wax by gravure.

The upper sheet (51) of the hot water cutting area (A) is peeled off by pulling the pull tab (45) for hot water cutting, so that the lower sheet (52) on the inner part of the half cut (47a) for hot water hole formation is The hot water cutting hole can be exposed by removing it accompanying the sheet (51).
Thus, in the example of the lid material of the present invention shown in FIG. 3, in addition to the example described with reference to FIG. 2, the convenience of easily discharging hot water after cooking by a hot water cutting mechanism is realized. .

The usage method of the container which uses the cover material (41) which concerns on this embodiment is demonstrated with reference to FIG. 1 and FIG.
The contents are stored in the container (40), and the lid (41) is heat-sealed to the flange (42) of the container. At the time of eating, the opening pull tab (43) is first opened slightly, and a predetermined amount of hot water is poured. The opening pull tab (43) is preferably hooked to the flange and resealed. After the lapse of the specified time, the hot water pull tab (45) is pulled up to remove only the upper sheet (51). At this time, if a half cut that penetrates only the lower sheet is provided at the base of the discharge pull tab (45), only the upper sheet can be smoothly peeled off. Since this operation exposes the hot water cut hole, the container is tilted to discharge the hot water from the hot water cut hole. Thereafter, the pulling tab (43) for opening is pulled up to remove the entire lid from the container, thereby allowing eating.

  In another example of the lid material of the present invention shown in FIG. 4, the layer structure of the laminate used for the lid material is that the surface polyethylene terephthalate film and the lower layer adhesive are removed from the upper sheet, and the lid shape is Except for the change from the round shape to the square shape and the shape and distribution of the hot water cutting holes, the detailed description is omitted.

  Hereinafter, based on an Example, Embodiment of the cover material which concerns on this invention is described further more concretely.

<Example 1>
A laminate as shown in FIG. 3A was prepared as follows. An aluminum foil (62) having a thickness of 12 μm is bonded to one surface of a biaxially stretched PET film (61) having a thickness of 12 μm and subjected to double-sided corona treatment with a dry laminate adhesive (67) to the lower sheet (52). A laminate to be used was prepared. On the other hand, pattern printing (70) is performed by gravure printing on the surface of single-sided art paper (gravure art basis weight 79, 1 g / m ² ) (60), and the printed surface and PET film (68) are pasted with adhesive (69). After the application, a release varnish (65) was applied to the hot water cutting region (A) on the lower surface of the paper (60) by gravure printing and dried to prepare an upper sheet (51).

  Next, an extrusion laminate of LDPE (thickness 20 μm) (66) is formed by separating the release varnish (65) surface of the upper sheet (51) thus obtained and the biaxially stretched PET film (61) surface of the laminate used for the lower sheet. Was laminated to obtain a laminate. Thereafter, an adhesive resin EMAA (thickness 10 μm) and an easy peel sealant layer (thickness 10 μm) were laminated as a sealant layer (64) on the aluminum foil (62) surface of the laminate by a coextrusion laminating method, A lower sheet laminate was obtained.

Further, a hot-cut hole forming half cut (47a) having the shape shown in FIG. 3 was formed from the side of the sealant surface of the laminate thus obtained. It was formed as a cut line having a depth reaching the paper (60) layer from the sealant (64) layer side. At the same time, a hot water cut portion forming half cut (46a) for forming a hot water cut portion having a depth penetrating the upper sheet was formed at a predetermined position.
On the other hand, from the paper surface side, it was formed as a cut line having a depth reaching the paper (60) layer as a cut process (10). The shape of the cut line was a broken line, the number was 5, and the length was 10 mm inside from the lid end. At the same time, it was cut out according to the dimensions to complete the lid. The lid shape was a round shape with a diameter of 180 mm and 21 round holes were used as hot water cutting holes (see FIG. 3). Using this lid material, a test container was prepared by heat sealing the flange of the container body.

<Example 2>
A laminate as shown in FIG. 4A was prepared as follows. An aluminum foil (62) having a thickness of 9 μm is bonded to one surface of a biaxially stretched PET film (61) having a thickness of 12 μm and subjected to double-sided corona treatment with a dry laminate adhesive (67) to the lower sheet (52). A laminate to be used was prepared. On the other hand, pattern printing (70) was performed on the surface of single-sided art paper (gravure art basis weight 104.7 g / m ² ) (60) by gravure printing, and a peeling varnish was applied to the hot water cutting area (A) on the lower surface of the paper (60). (65) was applied by gravure printing and then dried to prepare an upper sheet (51).

  Next, an extrusion laminate of LDPE (thickness 20 μm) (66) is formed by separating the release varnish (65) surface of the upper sheet (51) thus obtained and the biaxially stretched PET film (61) surface of the laminate used for the lower sheet. Was laminated to obtain a laminate. Thereafter, an adhesive resin EMAA (thickness 10 μm) and an easy peel sealant layer (thickness 10 μm) were laminated as a sealant layer (64) on the aluminum foil (62) surface of the laminate by a coextrusion laminating method, A lower sheet laminate was obtained.

  Furthermore, a hot-cut hole forming half cut (47a) having the shape shown in FIG. 4 was formed from the sealant surface side of the laminate thus obtained. It was formed as a cut line having a depth reaching the paper (60) layer from the sealant (64) layer side. At the same time, a hot water cut portion forming half cut (46a) for forming a hot water cut portion having a depth penetrating the upper sheet was formed at a predetermined position.

  On the other hand, from the paper surface side, it was formed as a cut line having a depth reaching the paper (60) layer as a cut process (10). The shape of the cutting line was a straight line, the number was 6, and the length was 20 mm inside from the lid end. At the same time, it was cut out according to the dimensions to complete the lid. The shape of the lid was a square with a side of 177 mm, and 18 hot holes were used as hot water cutting holes (see FIG. 4). Using this lid material, a test container was prepared by heat sealing the flange of the container body.

<Comparative Example 1>
A cover material was prepared in the same manner as in Example 1 except that the cut line for the cut process (10) was not provided, and a test container was prepared using the cover material.

<Comparative example 2>
A cover material was prepared in the same manner as in Example 2 except that the cut line for the cut process (10) was not provided, and a test container was prepared using the cover material.

The lid material manufactured under each of the above conditions was heat-sealed to the flange of a foamed polystyrene resin cup to complete the container. Thereafter, the opening pull tab was lifted and left in a state where the opening of the container was half exposed, and the shape retention property (dead hold property) of the lid member was confirmed. Moreover, hot water was poured from the opening part of the container, and the ease of removal was confirmed with the pull tab for opening being locked to the flange.
In addition, as an evaluation of the feeling of use of the lid at the time of opening, it was also confirmed whether there was any damage to the material at the time of opening and other functions as a lid material such as paper breakage, hole remaining, hole dropping, abnormal peeling at the time of hot water cutting. It was.

As a result of the above evaluation, in the containers using the lid materials of Comparative Example 1 and Comparative Example 2, it was found that the shape of the lid material was returned due to insufficient dead hold property, but the lid materials of Examples 1 and 2 were used. In the container used, lack of dead hold property was not recognized.
The feeling of use of the lid at the time of opening is compared with Examples 1 and 2 regarding the presence or absence of damage of the material at the time of opening and other functions as a lid material such as paper breakage at the time of hot water drainage, hole remaining, hole dropping, abnormal peeling, etc. In Examples 1 and 2, there was no particular problem.

  Moreover, according to the lid | cover material of this invention, since an aluminum foil is included in a lower sheet | seat, there also exist the following various advantages. That is, the gas barrier property and the light shielding property of the lid material are improved, and the storage stability of the contents is enhanced. Further, when the upper sheet of the hot water cutting region is partially peeled, the elastic repulsive force generated in the direction in which the lower sheet inside the hot water cutting hole forming half cut is separated from the upper sheet can be reduced. Moreover, opening retainability required when opening a pouring gate can be provided. Furthermore, the dead hold property is good when the unsealed portion is resealed after opening and pouring hot water.

  As described above, according to the lid material of the present invention, when the upper sheet is peeled off, the lower sheet portion inside the half cut is surely raised regardless of the shape of the discharge hole defined by the hot-cut hole forming half cut. Accompanying the sheet, it is possible to peel off with a stable peel strength to make a hot water hole appear. As a result, it is possible to adopt a round shape that is easy to peel off, a horizontally long track shape, etc. as the shape of the hot water cutting hole, thereby improving the hot water discharge speed and the freedom in design. Is obtained.

  Therefore, according to the present invention, it is possible to obtain an instant food container lid with a hot water cut, which has a moderate peel strength and a good peel appearance in production, and has an excellent practical effect as an instant food container lid with a hot water cut. Demonstrate.

  According to the present invention, the lid is heat sealed to a paper cup or a plastic container, and can be widely used for a lid having a paper layer and an aluminum layer in the layer structure of the lid member.

A ... Hot water cutting region B ... Other region 10 ... Cut processing 40 ... Container 41 ... Cover material 42 ... Flange 43 ... Opening pull tab (first pull tab)
45 ... Hot water drain pull tab (second pull tab)
46a: Half cut for forming a hot water cut portion (second half cut)
47a: Half cut for hot water cut hole formation 48a: Cut for peeling start (first half cut)
51 ... Upper sheet 52 ... Lower sheet 60 ... Paper 61 ... Stretched plastic film 62 ... Aluminum foil 63 ... Stretched plastic film 64 ... Sealant 65 ... Release varnish 66 ... Adhesive resin 67 ... Adhesive 68 ... PET
69 ... Adhesive 70 ... Ink

Claims (4)

A cover material that covers the flange formed along the periphery of the opening of the container main body so as to be peelable and has a size substantially equal to the outer shape of the flange, and covers the opening and the flange integrally. And a pull tab that extends integrally with the lid body so as to be located outside the flange and is used when the lid body is separated from the opening, the lid body and the pull tab at least have a lower surface flanged In a lid material composed of a laminate comprising a lower sheet that is detachably adhered to the upper sheet, and an upper sheet that is laminated on the upper surface of the lower sheet and includes a paper layer having the upper surface as the surface of the lid body.
The upper sheet is configured to be peelable from the lower sheet at the interface with the lower sheet, and includes at least an aluminum foil and a stretched plastic film on one side thereof between the upper sheet and the lower sheet to constitute a lid body. At least one layer is provided with one or more cuts in a direction perpendicular to the opening direction. A cover material that covers the flange formed along the periphery of the opening of the container main body so as to be peelable and has a size substantially equal to the outer shape of the flange, and covers the opening and the flange integrally. A lid body, a first pull tab that extends integrally with the lid body so as to be positioned outside the flange, and is used to separate the lid body from the opening, and extends integrally with the lid body; A second pull tab used when a hot water drain hole for discharging liquid from the container body appears on the lid body;
The lid main body, the first pull tab, and the second pull tab are at least a lower sheet that has a lower surface that is detachably attached to the flange, and an upper sheet that is laminated on the upper surface of the lower sheet and has the upper surface as the surface of the lid main body. For starting peeling, which penetrates the lower sheet from the lower surface of the lower sheet so as to connect the two points of the outer edge of the lower sheet located on both sides of the second pull tab across the root part of the second pull tab. A break is formed,
With the peripheral edge on the first pull tab side as a starting point from the peeling start cut, a half-cut for forming a closed hot water cut portion having a predetermined shape penetrating the upper sheet from the upper surface of the upper sheet is formed, and the peeling start cut And a plurality of hot water hole forming half cuts having a desired shape and a desired arrangement are formed in a region surrounded by the closed hot water cut portion forming half cut of the predetermined shape,
The partial region of the upper sheet in a state where the portion of the lower sheet to which the hot water cut hole forming half cut is attached is attached to the partial region of the upper sheet by the peeling operation of the second pull tab. In the lid material configured to be peelable from the lower sheet,
The upper sheet is configured to be peelable from the lower sheet at the interface with the lower sheet, and includes at least an aluminum foil and a stretched plastic film on one side thereof between the upper sheet and the lower sheet to constitute a lid body. At least one layer is provided with one or more cuts in a direction perpendicular to the opening direction. One or more cuts in the direction perpendicular to the opening direction are the thickness direction of the lid body, and any of paper layer, upper sheet including paper layer, stretched plastic film, lower sheet including sealant layer, and sealant layer The lid material according to claim 1 or 2, wherein the lid material has a depth penetrating partway or through all layers.   One or more cuts in a direction perpendicular to the opening direction are a collection of cuts having a certain angle arranged in a straight line with a full width or a partial width in the width direction of the lid body. The lid member according to any one of claims 1 to 3, wherein