JP2007168906A - Lid material with hot water draining hole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid material with hot water draining holes where a lid material is peeled from the end edge to start peeling and the hot water draining holes are surely formed on an inner lid in a package with the lid material mounted on a container made of an expanded polystyrene or the like. <P>SOLUTION: The lid material comprises an outer lid 10 and the inner lid which are peelably laminated via a mold-releasing layer and is formed to have a tab part projecting outward from an outer periphery. The mold-releasing layer is formed in a region adjacent to the tab part, the inner lid 20 has a plurality of hot water draining cuts 4 in the region opposed to the mold-releasing layer, the tab part 2a is formed so that the peripheral edge of the outer lid projects outward from the peripheral edge of the inner lid 20, and the inside of the tab part is made to be an end edge 3 to start peeling. The outer lid 10 is formed with an inner lid cut 5 in the direction orthogonal to the line connecting between the tab part 2a and the center of the lid material, and the mold-releasing layer is formed in a region surrounded by the peripheral edge of the tab part, the outer lid cut 5, and the peripheral edge of the lid material. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to a lid material with a hot water hole used for a container for performing hot water cutting after pouring hot water into the noodle and leaving it for a certain period of time, such as cupped fried noodles and raw noodles.

  Conventionally, cupped fried noodles are stored in a container made of expanded polystyrene or the like, and an outer lid and an inner lid are laminated so as to be at least partially peelable, and a peeling start cut is formed in the vicinity of the knob portion of the inner lid, There is known a configuration in which a lid member that is capable of forming a hot water hole in the inner lid by gripping the knob and partially peeling the outer lid is attached by thermal bonding.

  However, as described above, the outer lid and the inner lid are laminated at least partially so as to be peelable, and the lid material in which the peeling start cut is formed in the vicinity of the knob portion of the inner lid is heated in a container made of foamed polystyrene or the like. In the bonded package, the handle is grasped and the outer lid is peeled off from the inner lid from the point where the peeling starts, so that a hot water cutting hole is formed in the inner lid. In the lid material in which the peeling start cut is formed, there is a slight shift in the position of the peeling start cut with respect to the peripheral edge punched out of the lid material in the process of manufacturing the lid material, and when the lid material is attached to the container, Since the relative position of the container slightly deviates, when the lid material is thermally bonded to the container, the position of the peeling start cut is shifted toward the center of the container, and the peeling start cut is at the outer edge of the thermal bonding part. It may not enter and may enter the thermal bonding part. In that case, since the heat-adhesive resin layer of the lid material outside the separation start cut line adheres to the container, the surface layer of the foamed polystyrene of the container is the lid material when grasping the knob and peeling the lid material. Taken in a state of being bonded to the inner surface, the lid material cannot be separated into the outer lid and the inner lid at the point where the peeling starts, and there is a disadvantage that the lid material peels off from the container. ing.

In addition, the following can be mentioned as a prior art document.
JP 2000-203654 A JP 2001-019059 A

  The object of the present invention is to ensure that the outer lid of the lid material is peeled off from the position of the peeling start edge in the package body in which a lid material with a hot water cut hole is attached to a container made of expanded polystyrene, so that the inner lid is surely heated. It is an object of the present invention to provide a lid member with a hot water cut hole that can form a cut hole.

  An outer lid and an inner lid have a structure in which the outer lid and the inner lid are laminated so as to be peelable through a release layer, and the lid has a shape having a knob protruding outward at at least one location on the outer peripheral edge. The inner lid is formed in a region adjacent to the knob, the inner lid is formed with a plurality of hot water cut holes in the region facing the release layer, and the knob has a peripheral edge of the outer lid protruding outward from the peripheral edge of the inner lid. In this manner, the inside of the knob is the peeling start edge.

  Since the knob part consists only of the outer lid and does not have thermal adhesiveness, when the lid material is thermally bonded to the container, the peeling start edge of the lid material is positioned at the outer edge of the thermal bonding part between the container and the lid material. However, even if it has entered the thermal bonding part, the part of the knob part outside the peeling start edge of the lid material does not adhere to the container, so when grasping the knob part and peeling the lid material from the container, Since only the outer lid can be smoothly peeled from the inner lid in a state where the inner lid inside the peeling start edge is adhered to the container, it is possible to reliably form the hot water cutting hole.

  In the lid material with a hot water cut hole, the release layer is configured to be a solid release layer in a region near the peeling start edge and a halftone dot release layer in the other region, whereby a knob portion When the lid is peeled from the container by gripping, the inner lid and the outer lid are easily peeled in the vicinity of the peeling start edge where the solid release layer is formed. Even when the peeling start edge of the lid member is shifted to the outside of the thermal bonding portion, only the outer lid can be easily peeled from the inner lid in a state where the knob is grasped and the lid member is bonded to the container. In addition, the area where the cut hole cut is formed is a halftone dot release layer, and the peel strength between the outer lid and the inner lid is slightly increased, so the portion surrounded by the cut hole cut line is bonded to the outer lid. The hot water hole is formed in the inner lid.

  In the lid member with a hot water cut hole, the outer lid is formed with an outer lid cut line that reaches the periphery of the lid member in a direction perpendicular to a line connecting the knob and the center of the lid member. In the state where the release layer is formed in the area surrounded by the periphery of the lid material, the gripping part is grasped, the lid material is peeled from the container, and a hot water cutting hole is formed in the inner lid. The outer lid can be cut off.

  In the lid member with a hot water cut hole, the inner lid is formed with an arc-shaped inner lid notch projecting to the side of the knob portion symmetrical to the line connecting the knob portion and the center of the lid member. By adopting a structure in which the release layer is formed in the area surrounded by the lid cut line and the periphery of the cover material, when the grip material is grasped and the cover material is peeled from the container, the outer cover is formed in the area where the release layer is formed. Is easily peeled off from the inner lid and the inner lid in which a hot water cut hole is formed is adhered to the container, and the inner lid is adhered to the outer lid in an area where the release layer is not formed. Since the inner lid is cut off along the cut line, a large opening for taking out the contents stored in the container can be formed.

  In the lid member with a hot water cut hole, the outer lid is composed of a single paper layer or a laminate of a plastic film and a paper layer, and the inner lid is composed of a laminate of a polyethylene layer, an aluminum foil, and a heat-adhesive resin layer. With this configuration, it becomes easy to form a hot water cut hole cut and an inner lid cut in the inner lid by half cutting from the inner surface of the lid member. Moreover, since the aluminum foil is laminated, curling of the lid material is reduced, and workability when the lid is thermally bonded to the container is improved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a bottom view showing a first embodiment of the present invention, FIG. 2 is a sectional view taken along line II in FIG. 1, FIG. 3 is a bottom view showing a second embodiment of the present invention, and FIG. II-II sectional view in FIG. 5, FIG. 5 is a sectional view in which the lid of the first embodiment is thermally bonded to the container mouth portion, and FIG. 6 is a sectional view in which the outer lid is peeled off by grasping the knob from the state shown in FIG. FIG. 7 is a cross-sectional view in which the lid material of the second embodiment is thermally bonded to the container mouth portion, and FIG. 8 is a cross-sectional view in which the outer lid is peeled off by grasping the knob from the state shown in FIG. Are lid members, 2a and 2b are knobs, 3 is a peeling start edge, 4 is a cut-off hole cut, 5 is an outer-cover cut, 6 is an inner-cover cut, 7 is a hot-cut hole, 8 is a heat bonding portion, 9 Is an outer lid, 11 is a plastic film layer, 12 is an adhesive layer, 13 is a paper layer, 14a is a halftone release layer, 14b is a solid release layer, 15 is a printing layer, 20, 20 'is the inner lid, 21 is Riechiren layer, 22 is an aluminum foil layer, 23 represents a heat-adhesive resin layer.

  The bottom view and cross-sectional view of the lid 1 according to the first embodiment of the present invention are as shown in FIGS. As shown in FIG. 1, the shape of the lid member 1 is substantially circular and includes an outer lid 10 for peeling off the outer lid 10 from the inner lid 20 and forming a hot water cutting hole at opposite ends. A knob 2a and a knob 2b for peeling off the lid 1 from the container and opening it are formed so as to protrude outward. The outer lid 10 is formed with an outer lid cut 5 that reaches the periphery of the lid 1 in a direction perpendicular to a line connecting the knob 2 a and the center of the lid 1 at a position closer to the knob 2 a than the center of the lid 1. ing. The peripheral edge of the inner lid 20 inside the knob portion 2a is a peeling start edge 3, and the inner lid 20 is formed with a plurality of hot water cut holes 4 on the center side of the container from the peeling start edge 3. The halftone dot release layer 14 a is formed in a region on the knob 2 a side from the outer lid cut line 5, and the solid release layer 14 b is formed in a region on the outer edge side from the peeling start edge 3. The peeling start edge 3 is for grasping the knob portion 2a to peel the lid material 1 to peel the outer lid 10 from the inner lid 20 to form a hot water cutting hole. The outer lid cut 5 is the inner lid 20. This is for cutting off and removing the outer lid 10 peeled off.

  The cross-sectional structure of the lid member 1 is as shown in FIG. 2, and is composed of a plastic film layer 11, an adhesive layer 12, a paper layer 13, a halftone release layer 14a and a solid release layer 14b in this order from the outer surface. 10, an inner lid 20 made of a polyethylene layer 21, an aluminum foil 22, and a heat-adhesive resin layer 23 is laminated, and a knob 2 a protruding outward from the peeling start edge 3 is formed by the outer lid 10. An easily peelable resin is used as the heat-adhesive resin layer 23 so that the heat-bonded lid 1 can be peeled from the container. The print layer 15 is formed on the outer surface of the paper layer 13. The release layer formed on the surface of the paper layer 13 on the inner surface of the outer lid 10 is a halftone dot release layer 14a in the area on the knob 2a side from the outer lid cut line 5, and is located on the outer edge side from the peeling start edge 3. In the region, a solid release layer 14b is formed. It is good also as a structure which does not form the halftone dot release layer 14a in the area | region corresponding to the center part of the hot water cut hole cut 4. FIG. The inner side of the knob portion 2 a at the periphery of the inner lid 20 is the peeling start edge 3, and the inner lid 20 is in a region where the halftone dot release layer 14 a between the peeling start edge 3 and the outer lid cut line 5 is formed. A plurality of hot water cut hole cuts 4 are formed. The outer lid cut 5 is formed in a state of penetrating the outer lid 10, and the hot water cut hole cut 4 is formed in a state of penetrating the inner lid 20.

  A bottom view and a cross-sectional view of the lid member 1 ′ of the second embodiment of the present invention are as shown in FIGS. 3 and 4. As shown in FIG. 3, the shape of the lid 1 ′ is substantially circular, and the outer lid 10 ′ is peeled from the inner lid 20 ′ at one circumferential end to form a hot water cutting hole and the lid 1 A knob 2a made of an outer lid 10 'for separating 1' from the container to form a large opening is formed to protrude outward. The peripheral edge of the inner lid 20 ′ inside the knob 2 a is the peeling start edge 3, and the inner lid 20 ′ is formed with a plurality of hot water cut holes 4 on the center side of the container from the peeling start edge 3. An arc-shaped inner lid cut 6 is formed that protrudes toward the side of the knob 2a that is symmetrical to the line connecting the knob 2a and the center of the lid 1 '. The peeling start edge 3 is for grasping the knob 2a and peeling the lid 1 'to peel the outer lid 10' from the inner lid 20 'to form a hot water cut hole. Is for cutting off the inner lid 20 'to form a large opening for taking out the contents stored in the container.

  As shown in FIG. 4, the cross-sectional configuration of the lid member 1 is an outer lid 10 ′ including a plastic film layer 11, an adhesive layer 12, a paper layer 13, a halftone release layer 14 a, and a solid release layer 14 b in order from the outer surface. Then, an inner lid 20 ′ composed of a polyethylene layer 21, an aluminum foil 22, and a heat-adhesive resin layer 23 is laminated, and a knob portion 2 a protruding outward from the peeling start edge 3 is formed by the outer lid 10 ′. An easily peelable resin is used as the heat-adhesive resin layer 23 so that the heat-bonded lid 1 can be peeled from the container. The print layer 15 is formed on the outer surface of the paper layer 13. The release layer formed on the surface of the paper layer 13 on the inner surface of the outer lid 10 ′ is a halftone dot release layer 14 a in the area on the knob 2 a side from the outer lid cut line 5, and is on the outer edge side from the peeling start edge 3. In this region, a solid release layer 14b is formed. It is good also as a structure which does not form the halftone dot release layer 14a in the area | region corresponding to the center part of the hot water cut hole cut 4. FIG. The inside of the knob 2a at the periphery of the inner lid 20 ′ is the peeling start edge 3, and in the region where the halftone dot release layer 14a between the peeling start edge 3 of the inner lid 20 ′ and the inner lid cut 6 is formed. A plurality of hot water cut hole cuts 4 are formed. The hot water cut hole cut 4 and the inner lid cut 6 are formed so as to penetrate the inner lid 20 '. In FIG. 1 and FIG. 3, the hot water cut hole cut 4 is circular, but it is not limited to circular, and a plurality of linear cuts may be arranged in parallel or staggered.

  The state in which the lid 1 of the first embodiment is thermally bonded to the container is as shown in FIG. A lid 1 is attached to a flange portion of a container 9 made of expanded polystyrene or the like by being thermally bonded by a heat bonding portion 8 with a heat bonding resin layer 23 on the inner surface. When the lid member 1 is attached to the container 9 by thermal bonding, it is attached so that the peeling start edge 3 on the peripheral edge of the inner lid 20 is positioned at the outer end of the thermal bonding portion 8. When the peeling start edge 3 is not positioned at the outer end of the thermal bonding part 8 and enters the thermal bonding part 8 due to the shift of the peeling start edge 3 relative to the lid and the relative shift between the lid 1 and the container 9 However, since the knob 2a is formed by the outer lid 10, the lid 1 is not bonded to the flange portion of the container 9 outside the peeling start edge 3, and the thermally bonded lid 1 is picked. When the portion 2 a is grasped and peeled from the container 9 made of expanded polystyrene or the like, the surface layer of the flange portion of the container 9 is not taken in a state of being adhered to the inner surface of the lid member 1. Accordingly, it is possible to reliably peel the outer lid 10 from the inner lid 20 from the location of the peeling start edge 3 to form the hot water cutting hole 7. Further, when the lid material 1 is thermally bonded to the container 9, even if the peeling start edge 3 formed on the inner lid 20 is attached to be shifted outside the outer end of the thermal bonding portion 8, the peeling start edge 3 is formed with a solid release layer 14b so that the outer lid 10 and the inner lid 20 are easily peeled off. Therefore, the outer lid 10 and the inner lid 20 can be easily removed from the location of the peeling start edge 3. Can peel.

  FIG. 6 shows the state in which the cover 1 of the first embodiment is thermally bonded to the container and the state shown in FIG. By grasping the knob 2a and peeling the lid 1 from the container 9, the outer lid 10 is peeled from the inner lid 20 in the region where the halftone dot release layer 14a is formed on the inner surface of the outer lid 20, and the outer lid. A plurality of hot water cutting holes 7 can be formed in the inner lid 20 from which the 10 is peeled off. The packaging body to which the lid 1 of the first embodiment is attached is used for packaging such as instant fried noodles, and in use, the lid 1 is held at a certain distance from the container 9 by grasping the knob 2b of the lid 1 After peeling off only to form an opening, taking out a sachet contained in the container 9 and pouring hot water into the container 9 to a predetermined water level and leaving it for a certain time, The hot water is discharged from the hot water cut hole 7 formed as described above and cut into hot water. When the hot water cutting is completed, the lid 2 is completely peeled off from the container 9 by grasping the knob 2b of the container.

  FIG. 7 shows a cross section of the state in which the lid 1 ′ of the second embodiment is thermally bonded to the container 9. A lid member 1 ′ is attached to a flange portion of a container 9 made of expanded polystyrene or the like by being thermally bonded by a heat bonding portion 8 with a heat bonding resin layer 23 on the inner surface. When the lid material 1 ′ is thermally bonded to the container 9, it is attached so that the peeling start edge 3 on the peripheral edge of the inner lid 20 ′ is located at the outer end of the thermal bonding portion 8. Since the knob 2a is formed by the outer lid 10 'even when the position of the position is shifted inward from the outer end of the thermal bonding part 8, the knob 2a is gripped in the same manner as the lid 1 of the first embodiment. When peeling the lid material 1 ′, the surface layer of the flange portion of the container 9 made of expanded polystyrene or the like is not taken off and adhered to the inner surface of the lid material 1 ′, so that it can be reliably started from the location of the peeling start edge 3 Then, the outer lid 10 ′ can be peeled off from the inner lid 20 ′ to form the hot water cutting hole 7.

  FIG. 8 shows a state in which the knob 2a of the lid 1 ′ is grasped and peeled from the container 9 from the state shown in FIG. 7 where the lid 1 ′ of the second embodiment is attached by being thermally bonded to the container 9. . By grasping the knob 2a and peeling the lid 1 'from the container 9, the outer lid 10' is separated from the inner lid 20 'in the region where the halftone dot release layer 14a is formed on the inner surface of the outer lid 20'. A plurality of hot water cutting holes 7 can be formed in the inner lid 20 ′ from which the outer lid 10 ′ has been peeled off and, further, the lid material 1 ′ is peeled off, so The inner lid 20 ′ is cut along the inner lid cut line 6 while being adhered to the lid 20 ′ or the outer lid 10 ′, and a large opening for taking out the contents stored in the container 9 can be formed. Is. The packaging body to which the lid material 1 ′ of the second embodiment is attached is used for packaging such as raw noodles. At the time of use, the knob 2a of the lid material 1 ′ is grasped and peeled off from the container 9, and the inner lid A plurality of hot water cutting holes 7 are formed in 20 'and the inner lid 20' is cut along the inner lid cut line 6 to form a large opening, and then the bag noodles and utensils stored in the container 9 are taken out. Open the bag, put the packaged contents into the container 9, pour hot water into the container 9 to a predetermined water level, leave it for a certain period of time, drain the hot water from the hot water cut-out hole 7 and use it after draining it It is.

  The method of forming the hot water cut hole cut 4 and the outer cover cut 5 in the lid material 1 of the first embodiment, and forming the hot water cut hole cut 4 and the inner cover cut 6 in the cover material 1 ′ of the second embodiment are: After laminating the inner lid so as to be partially peelable through the release layer, the hot water cut hole 4 and the inner lid cut 6 are half cut from the inner surface side, and the outer lid cut 5 is half cut from the outer surface side. These are formed so as to penetrate the inner lid or the outer lid, respectively. As a method of forming the knob part 2a of the lid material 1 and the lid material 1 ′ with an outer lid, a roll-like laminate was produced in which the outer lid and the inner lid were laminated so as to be partially peelable via a release layer. Later, a cut is formed at the position of the peeling start edge 3 so as to penetrate the inner lid from the inner surface of the laminated body to a predetermined position by a rotary die for half cut, and it becomes the peripheral edge of the lid 1 and lid 1 '. A half cut is formed along the peripheral edge slightly outside the punching position, and the inner lid between the cut at the position of the peeling start edge 3 and the half cut along the peripheral edge is continuously peeled and removed. It can be carried out.

  As the resin for forming the release layer, nitrified cotton, polyamide resin, polyester resin, acrylic resin, butyral resin, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, etc. are used alone or as a mixture. it can. If necessary, a small amount of silicone or the like may be added. The release layer is formed by printing on the paper surface by gravure printing or the like using the ink made of the above resin. The solid release layer is formed by printing using a solid plate, and the halftone dot release layer is formed by printing using a printing plate etched into a halftone dot shape having a dot area ratio of 10 to 40%. Peeling easily occurs at the interface between the solid release layer and the polyethylene layer, but the peel strength is slightly increased at the interface between the halftone release layer and the polyethylene layer. In the region of the peeling start edge where the solid release layer is formed, the outer lid and the inner lid can be easily peeled off. In FIGS. 1 and 3, a circular cut hole cut is arranged in the formation area of the halftone dot release layer, but the halftone dot cut is formed in a region facing the center of the circular cut hole cut. The mold layer may not be formed, and in that case, when the outer lid is peeled off, the inner lid of the portion surrounded by the circular hot water cut hole can be peeled off integrally with the outer lid. A hot water cutting hole can be formed reliably.

In the embodiment of the present invention, the structure of the outer lid is a laminate of a plastic film and paper, but the outer lid may be a single paper layer. In the case of the outer lid of the configuration of the embodiment, the paper thickness is about 40 to 160 g / m ² , and when the outer lid is a single piece of paper, the paper thickness is 70 to 130 g / m ² . Is preferred. As the adhesive layer, a urethane-based adhesive or extruded polyethylene can be used. As the heat-adhesive resin layer, an easily peelable resin mainly composed of an ethylene-vinyl acetate copolymer that can be melted by heat and extruded and laminated can be used. As the structure of the outer lid, for example, biaxially stretched polyethylene terephthalate 12μ / urethane adhesive / printing layer / paper 60g / m ² / part separation type layer, biaxially stretched polyethylene terephthalate 12μ / polyethylene 20μ / printing layer / paper 60g / M ² / part separation type layer, printing layer / paper 80 g / m ² / part separation type layer, etc. The structure of the inner lid is polyethylene 20 μ / aluminum foil 7 to 15 μ / thermoadhesive resin 25 μ, polyethylene 20 μ. / Aluminum foil 7 to 15 μ / polyethylene 20 μ / thermal adhesive resin 20 μ.

  Like the lid material of the present invention, the outer lid and the inner lid have a structure in which the outer lid and the inner lid are laminated so as to be peelable through the release layer, and have a knob portion protruding outward at at least one location on the outer peripheral edge. The release layer is formed on the inner surface of the outer lid in the area adjacent to the knob, the inner lid is formed with a plurality of scoring hole cuts in the area facing the release layer, and the knob has a peripheral edge of the outer lid. It is formed so as to protrude outward from the peripheral edge of the inner lid, and the inside of the knob is configured to be a peeling start edge, thereby shifting the position of the peripheral edge of the lid material and the peeling start edge and the lid material. When the relative position of the container shifts and the lid is thermally bonded to the container, the peeling start edge of the lid comes to a position inside the outer edge of the thermal bonding portion between the container and the lid. Even in this case, when gripping the knob and peeling the lid from the container, only the inner lid is attached with the inner lid inside the peeling start edge adhered to the container. It is possible to separate smoothly from one in which it is possible to form a reliable water cut holes.

The bottom view which shows 1st Embodiment of this invention. II sectional drawing in FIG. The bottom view which shows 2nd Embodiment of this invention. II-II sectional drawing in FIG. Sectional drawing which heat-bonded the cover material of 1st Embodiment to the container opening part. Sectional drawing which grasped the knob | pick part from the state shown in FIG. 5, and peeled the outer cover. Sectional drawing which heat-bonded the cover material of 2nd Embodiment to the container opening part. Sectional drawing which grasped the knob | pick part from the state shown in FIG. 7, and peeled the outer cover.

Explanation of symbols

1, 1 'lid material 2a, 2b knob 3 peeling start edge 4 hot water cut hole 5 outer lid cut 6 inner lid cut 7 hot water cut hole 8 heat bonding part 9 container 10, 10' outer lid 11 plastic film layer 12 Adhesive layer 13 Paper layer 14a, 14a 'Halftone release layer 14b Solid release layer

Claims (5)

  An outer lid and an inner lid having a structure in which the outer lid and the inner lid are detachably laminated via a release layer, and having a knob portion protruding outward at at least one location on the outer peripheral edge, the release layer Is formed in a region adjacent to the knob portion, the inner lid is formed with a plurality of hot water cut holes in a region facing the release layer, and the knob portion has a peripheral edge of the outer lid. A lid material with a hot water cut hole, characterized in that it is formed so as to protrude outward from the peripheral edge, and the inside of the knob is the peeling start edge.   2. The hot water cutting device according to claim 1, wherein the release layer is configured to be a solid release layer in a region near the peeling start edge and a halftone release layer in another region. Cover material with holes.   The outer lid is formed with an outer lid cut in a direction perpendicular to a line connecting the knob portion and the center of the lid material, and in a region surrounded by the edge of the knob portion, the outer lid cut line, and the edge of the lid material. The lid member with a hot water hole according to claim 1 or 2, characterized in that the release layer is formed.   The inner lid is formed with an arc-shaped inner lid notch projecting to the side of the knob that is symmetric with respect to a line connecting the knob and the center of the lid member, and the periphery of the knob, the inner lid cut and the lid 3. The lid material with a hot water cut hole according to claim 1, wherein the release layer is formed in a region surrounded by the periphery of the material.   The outer cover is composed of a single paper layer or a laminate of a plastic film and a paper layer, and the inner lid is composed of a laminate of a polyethylene layer, an aluminum foil, and a heat-adhesive resin layer. The lid material with a hot water cut hole according to any one of 4.

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