JP2009263010A - Cover body for sealing container with excellent unsealing retainability - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cover body having dead fold property which is sufficient to retain an unsealing state and being suitable for a container for an instant food product or the like. <P>SOLUTION: The cover body 2 for sealing the container has a paper sheet 204, a curling plastic layer 201, and partially easily peelable layers 23, and sealed to the container with the paper sheet 204 positioned on the lower side of the curling plastic layer 201. The cover body comprises an unsealing tab part formed at the outer peripheral edge of the cover body, a half-cut 24d for peeling the tab part positioned a lower surface side of the cover body, and an annular half-cut 24c for forming a hot-water spout formed on the lower side of the cover body 2 on the central side from the half-cut 24d. The partially easily peelable layers 23 are formed to surround the annular half-cut 24c for forming a hot-water spout, and a film forming the curling plastic layer 201 is glued on the paper sheet 204 while extension in a machine direction within an elastic deformation range is given to the film. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lid that is excellent in opening retention and suitable for use in containers such as instant foods.

  It is preferable that the lid of a container for storing instant food such as cup ramen or instant fried noodles can be easily poured while being opened and can be easily sealed while being held for about 3 minutes. For easy pouring at the time of opening, it is necessary that the opened lid curls strongly and the opened state is maintained. In order to facilitate re-sealing, it is necessary that the opening part (flap part) of the lid easily engages with the remaining part of the lid or the container body so that the flap is kept in a sealed state. It is.

  Regarding openability, Japanese Patent Application Laid-Open No. 2002-302154 (Patent Document 1) is a lid body 200 that is sealed to an upper end flange portion 1a of a container body 1 that accommodates contents as shown in FIGS. Thus, a lid having an opening tab portion 21 and tear starting points 22a and 22b provided on both sides of the opening tab portion 21 is disclosed. Since the lid 200 is composed of a laminated sheet having at least a dead hold property imparting paper sheet and a sealant film, when the opening tab portion 21 is lifted, as shown in FIG. 27, the lid 200 extends from the tear start points 22a and 22b. It is torn along 220a and 220b, and the strip-shaped flap part 3 is made. The remaining side edges 2a, 2b of the lid 2 and side edges 3a, 3b of the strip-shaped flap 3 are notched because the tear surface of the paper sheet is exposed. Therefore, after pouring in the state where the flap portion 3 is raised, when the flap portion 3 is resealed, the jagged side edges 2a, 2b of the lid 200 and the jagged side edges 3a, 3b of the belt-like flap portion 3 Are engaged, and the flap portion 3 is firmly resealed. However, since the lid 200 has only a paper sheet as the dead hold property imparting layer, it has been found that the flap portion 3 may not rise sufficiently.

  Japanese Patent Laid-Open No. 2004-83099 (Patent Document 2) discloses a lid comprising a laminated sheet mainly including a polybutylene terephthalate (PBT) film, a paper sheet, and a sealant film in order from the upper surface in order to ensure sufficient rise of the flap portion 3. The body 300 is disclosed. Since the lid 300 has a PBT film excellent in dead hold property, the curl of the flap portion 3 is superior to the lid described in Patent Document 1. However, since the lid 300 has a portion on the lower surface side of the paper sheet, the flap portion 3 rises when the lid 300 has a rigid resin film or the like on the lower surface side of the paper sheet. It turns out that it may not be enough.

JP 2002-302154 A JP 2004-83099 A

  Accordingly, an object of the present invention is to provide a lid suitable for containers of instant foods or the like having a dead hold property sufficient to hold the opened state.

  As a result of diligent research in view of the above object, the present inventors have found that the flap part obtained by opening the lid part has a plastic layer having a large curl property on the entire surface and does not have the entire layer part on the entire surface. The inventors have found that when an easy-peeling layer is provided, excellent opening retention due to large curl properties can be achieved, and the present invention has been conceived.

  That is, the container sealing lid of the present invention has a paper sheet, a curled plastic layer, and a partially easy-release layer, and is sealed to the container with the paper sheet facing down from the curled plastic layer. A container-sealing lid, an opening tab portion provided on an outer peripheral edge, a tab portion peeling half-cut provided on the lower surface side of the opening tab portion, and the tab portion peeling half-cut An annular half cut for pouring gate formed on the lower side of the lid on the center side, and the partial easy peeling layer is provided so as to surround the annular half cut for pouring port formation The curlable plastic layer is composed of a curlable plastic film, and the curlable plastic film is bonded to the paper sheet in a state of being stretched in the machine direction in an elastic deformation region, Body and having a curling property.

  The partially easy peeling layer is preferably formed from the tab part peeling half cut to a position beyond the center of the lid. It is preferable that a peeling stop mark is provided on the lid, and the partially easy peeling layer is formed from the tab part peeling half cut to the position of the peeling stop mark.

  The second container sealing lid of the present invention, which is affixed to an instant food container that is drained after pouring, has the following characteristics in addition to the characteristics of the first lid. That is, the container sealing lid has a hot water cut opening forming tab portion, and the hot water cut opening forming tab portion has a pair of cuts, and an open end faces inward between the pair of cuts. A plurality of substantially U-shaped half cuts engraved on the lower side, each U-shaped half cut comprising a pair of straight portions and a connecting portion of both straight portions; The tip of the U-shaped half cut is located within the seal portion of the lid, and the portion of the hot water cut opening forming tab portion is surrounded by the portion surrounded by the U-shaped half cut and the tip of the pair of straight portions. Between each straight line extending in the opening direction, a partially easy peeling layer for hot water cut opening formation is provided, and the U-shaped half cut has a depth from the lower surface of the lid to the partially easy peeling layer. And the easy tear direction of the lid body substantially coincides with the direction of the cut Therefore, when the lid is peeled off from the container main body with the hot water cut opening forming tab portion, the lid is torn from the cut and the tip of the U-shaped half cut to form the hot water cut opening. The portion on the lower surface side from the partially easy peeling layer remains in close contact with the upper end flange portion of the container body, so that a plurality of hot water outlets are formed.

  It is preferable that the partial cut layer for forming the hot water cut opening is provided from the U-shaped half cut to the position of the peeling stop mark for the tab portion for forming the hot water cut opening.

  It is preferable that the pair of straight portions of the U-shaped half-cut are inclined so that the distance between the straight portions decreases toward the front. It is preferable that a pair of line portions are provided at the tips of the pair of cuts so as to be inclined so that the distance from the tip increases.

  It is preferable that the tip of the cut and the tip of the pair of straight portions of the U-shaped half cut are located on the outer peripheral side with respect to the center line of the seal portion of the lid. The position of the tip of the cut and the tip of the pair of straight portions of the U-shaped half cut in the seal portion is more preferably in the range of 30 to 50% of the width of the seal portion from the outer periphery.

  It is preferable that a hot water cut forming half cut is provided in a straight line extending in the opening direction from each tip of the cut. It is preferable that a hot water cut forming half cut is provided on the lower side of the lid body along a straight line extending in the opening direction from each tip of the U-shaped half cut.

  The third container sealing lid of the present invention, which is affixed to the instant food container to be drained after pouring, has the following characteristics in addition to the characteristics of the first lid. That is, this container sealing lid is (a) a plurality of rectangular hot water cut forming half cuts are engraved on the lower side of the lid at a position substantially opposite to the opening tab portion, and ( b) The partially easy peeling layer is provided so as to surround the rectangular half cut for forming the hot water cut end.

  All of the first to third container sealing lids preferably have a polybutylene terephthalate film as the curl plastic layer.

  Each of the first to third container sealing lids has a curling plastic layer, a paper sheet, an adhesive layer, a rigid plastic film, and a sealant layer from the upper surface side, and the partial easily peelable layer is formed on the adhesive layer. Preferably it is provided. The rigid film is preferably made of a uniaxially oriented or biaxially oriented polyethylene terephthalate film having a different degree of orientation. It is preferable that the said partial easy peeling layer exists in the same surface as the upper surface or lower surface of the said contact bonding layer, or the said contact bonding layer. It is preferable that an adhesive plastic (for example, polyethylene) film is provided on both sides of the partially easy release layer so that the paper sheet is not exposed on the release surface.

  The curlable plastic film is preferably bonded to the paper sheet in a machine direction stretch of 1 to 3%. The curl plastic film is preferably bonded to the paper sheet with a tension of 10 to 20 kgf / m width.

  The container sealing lid of the present invention has a plastic layer having a large curl property on the entire surface of the flap portion obtained by opening, and does not have the entire layer portion on the entire surface. Sex can be used. Therefore, the flap part can be kept in a state of being largely raised so that it is easy to pour hot water when opened. In addition, since a partially easy-release layer is provided on the upper surface side of the paper sheet, the jagged fracture surface of the paper sheet is exposed at the flap part obtained by opening, and excellent resealing is achieved by the engagement of the jagged fracture surface of the paper sheet. Sex can also be used. Therefore, it is possible to securely hold the resealed state by firmly engaging the lid by simply returning the flap part to the original position at the time of heat retention. As described above, the lid body having the partially easy-release layer on the upper surface side from the paper sheet is excellent in both opening retention and resealability.

  The lid body of the present invention having such characteristics is suitable as a lid body for instant foods such as cup noodles that are poured and poured with hot water. The container for food provided with the lid body having excellent curl property of the present invention is useful not only for instant food but also as a small container for containing a flavor additive.

It is a perspective view which shows the cover body for container sealing by one Example of this invention stuck on the cup noodle container. It is a top view which shows the cover body of FIG. It is a top view which shows the state which expanded the flap part formed by opening of the cover body of FIG. 2 180 degrees. It is an AA expanded sectional view of FIG. It is an expanded sectional view which shows the part X of FIG. It is BB expanded sectional drawing of FIG. It is a perspective view which shows the state which resealed after opening the cover body of FIG. 1 stuck on the cup noodle container. It is a top view which shows the cover body by another Example of this invention. It is a bottom view which shows the cover body of FIG. It is the elements on larger scale which show the tab part vicinity for the hot water cut opening formation of the cover body of FIG. It is another partial enlarged view which shows the tab part vicinity for the hot water cut opening formation of the cover body of FIG. It is CC expanded sectional drawing of FIG. It is DD expanded sectional drawing of FIG. It is the elements on larger scale which show the state which opened the tab part for hot water cut opening formation of FIG. It is a top view which shows the cover body by another Example of this invention. FIG. 16 is a bottom view showing the lid of FIG. FIG. 16 is an enlarged cross-sectional view taken along line EE in FIG. FIG. 16 is an enlarged cross-sectional view taken along line FF in FIG. FIG. 16 is a perspective view showing a state where a flap portion formed by opening the lid of FIG. 15 attached to an instant fried noodle container is removed. It is a perspective view which shows the cover body by another Example of this invention stuck on the cup noodle container. It is a perspective view which shows the cover body by another Example of this invention stuck on the cup noodle container. It is a perspective view which shows the cover body by another Example of this invention affixed on the container for instant fried noodles. It is an expanded sectional view which shows another layer structure of the cover body of this invention. It is an expanded sectional view which shows another layer structure of the cover body of this invention. It is a top view which shows a mode that several cover bodies are punched out from a lamination sheet. It is a perspective view which shows the example of the conventional cover body affixed on the cup noodle container. FIG. 27 is a perspective view showing a state where the lid of FIG. 26 attached to a cup ramen container is opened.

  The structure of the lid of the present invention will be described with reference to the accompanying drawings, and the same reference numerals are given to the same parts as those shown in FIGS. 26 and 27 unless otherwise specified. Therefore, please refer to the description of the lid shown in FIGS.

[1] Lid structure
(1) First lid FIGS. 1 to 3 show a first lid of the present invention. The lid 2 attached to the cup ramen container 1 includes an opening tab portion 21, a tab portion peeling half cut 24d provided on the lower surface side of the tab portion 21, and a tab portion peeling half cut 24d on the center side. It has an annular half cut 24c for pouring gate formation carved on the lower side of the lid 2, and a partially easy peeling layer 23 provided so as to surround the annular half cut 24c for pouring port formation.

  The pouring mouth forming annular half cut 24c only needs to be large enough for pouring. The pouring mouth forming annular half cut 24c may be annular so as to form the pouring gate, and may be rectangular, trapezoidal or the like in addition to the elliptical shape shown in FIG.

  The partially easy peeling layer 23 is preferably formed from the tab part peeling half-cut 24 d provided on the opening tab 21 to a position beyond the center O of the lid 2. For example, as shown in FIG. 2, the partially easy peeling layer 23 is formed at least to the position of the peeling stop mark 26.

  The layer configuration of the lid 2 will be described. In the example shown in FIG. 4, the lid 2 includes a curled plastic (PBT) film 201, an extrusion-laminated polyethylene layer 203a, an adhesive layer 202, an extrusion-laminated polyethylene layer 203b, a paper sheet 204, an adhesive layer 205, an extrusion. A laminated polyethylene layer 206, a rigid plastic (PET) film 207, a light-shielding ink layer 208, an adhesive layer 209, an extrusion-laminated polyethylene layer 210, and a sealant layer 211 are formed. The partial easy release layer 23 is formed as a part of the adhesive layer 202. An annular half cut 24c for pouring gate formation and a half cut 24d for tab part peeling are a sealant layer 211, a polyethylene layer 210, an adhesive layer 209, a light shielding ink layer 208, a rigid plastic film 207, a polyethylene layer 206 from the lower surface of the lid 2. The adhesive layer 205 and the paper sheet 204 are penetrated to reach the adhesive layer 202.

  In the example shown in FIG. 5, an adhesive layer 202 is formed between a pair of polyethylene layers 203a and 203b between a curling plastic (PBT) film 201 and a paper sheet 204, and a part of the adhesive layer 202 is partially formed. It becomes the easy peeling layer 23. As shown in FIG. 6, the partially easy-release layer 23 has a structure in which the point-like peelable resin 125 is uniformly distributed in the adhesive layer 202. However, the partial easily peelable layer is not limited thereto, and may be a peelable resin layer coated in a thin film on the upper surface side or the lower surface side of the adhesive layer 202.

  When the unsealing tab portion 21 is pulled up, as shown in FIG. 3, the curl plastic (PBT) film 201 is separated from the lower surface portion of the paper sheet 204 by the partially easy peeling layer 23. A jagged fracture surface 2c is formed on the side of the remaining lid 2, and a jagged fracture surface 3c is also formed on the flap portion 3. Therefore, as shown in FIG. 7, when the flap portion 3 is resealed, the jagged fracture surface 2c of the lid body 2 and the jagged fracture surface 3c of the flap portion 3 are firmly engaged, and the flap portion 3 is resealed. to be certain.

  Further, in the region of the partially easy peeling layer 23, only the curling part 32 made of the curling plastic film 201 is substantially attached around the entire layer part 31 of the flap part 3, so the curling property of the flap part 3 is very high. Big. Therefore, the cup ramen container 1 has a frontage sufficient for pouring the hot water with the lid 2 opened. As described above, the lid body 2 having the partially easy-peeling layer 23 on the upper surface side from the paper sheet 204 is excellent in both opening retention and resealability.

(2) Second lid FIGS. 8 to 11 show a second lid of the present invention. 8 to 11, the same members or parts as those in FIGS. 1 to 3 are denoted by the same reference numerals. The lid body 2 has (a) a hot water cut opening forming tab portion 27 at a position substantially opposite to the opening tab portion 21, and (b) a pair of cuts 28 a, 28 b and both cuts 28 a, A plurality of substantially U-shaped half-cuts 29 engraved on the lower side of the lid body 2 at an approximately equal interval between 28b, and (c) a portion surrounded by the U-shaped half-cuts 29 And a partially cut-off layer 23c for forming a hot water cut opening between the straight lines 292, 292 extending in the opening direction of the tab portion 27 for forming the hot water cut opening 27 from the tips of the pair of inclined portions 291 291 of the U-shaped half cut 29. Is substantially the same as the first lid body except that the instant yakisoba container 1 is pasted.

  The cut lines 28a and 28b may be linear, but in order to improve tearability, the straight lines 280a and 280b extending from the outer peripheral edge of the lid 2 and inclined in the direction of expanding from the straight lines 280a and 280b. It is preferable that each tip portion 281a, 281b is formed.

  Each U-shaped half-cut 29 is composed of a pair of inclined portions 291 and 291 that are inclined so that the distance between the U-shaped half cuts 29 becomes smaller, and a connecting portion 290 thereof. It is preferably formed in a U shape, which improves tearability. However, the pair of inclined portions 291 and 291 may be parallel straight lines. The number of U-shaped half cuts 29 is preferably 1 to 6, and more preferably 2 to 5.

  As shown in FIG. 10, the tip inclined portions 281 a and 281 b and the inclined portions 291 and 291 must all be located within the seal portion 25 of the lid 2 in order to ensure sufficient heat sealing performance.

The tolerance when manufacturing the lid 2 at a high speed by punching the continuous laminated sheet 20 is about 1 mm. Therefore, the tip of the tip inclined portions 281a and 281b of the pair of cuts 28a and 28b and each U-shaped half cut the tip of the inclined portion 291,291 of 29 is preferably a radially outward of the center line 25a of the seal portion 25 of the lid 2, is within 30-50% of the range of the width d ₁₀ of the sealing portion 25 from the outer periphery more preferably, particularly preferably in the range from the outer 30 to 40% of the width d ₁₀ of the sealing portion 25. In addition, from the standpoint that the adhesiveness of the strip 11 is not impaired when the lid 2 is peeled off by holding the hot water cut opening forming tab 27, the connecting portion 290 of the U-shaped half cut 29 is a seal portion. It is preferably located within 25.

In order to shorten the hot water cutting time, it is desirable to make the width d ₁₁ of the hot water cutting opening 12 as wide as possible. However, if this is done, the area of the lid part peeled off from the seal portion 25 will increase, and the opening resistance will increase. The opening resistance is greatest at the start of peeling, and if the peeling area with the seal portion 25 is large, a large initial opening resistance is felt. Therefore, as shown in FIG. 10, the separation area from the seal portion 25 is gradually increased by the tip portions 281a and 281b inclined in the expanding direction, and the inclined portions 291 and 291 whose intervals become narrower toward the front. It is possible to smoothly open the hot water cut opening forming tab portion 27 without feeling initial resistance.

  The lengths of the tip inclined portions 281a and 281b and the inclined portions 291 are preferably 0.5 to 3 mm. As shown in FIG. 11, the angle θ between the tip inclined portions 281a and 281b and the straight portions 280a and 280b, and the angle θ ′ between the inclined portion 291 and the straight line 292 are preferably 120 ° to 170 °, It may be the same. If these angles are outside this range, even if the lid body 2 is easily tearable, it is torn linearly from the tip inclined portions 281a, 281b and the inclined portions 291 along the easy tear direction. There is a risk of not.

The distance d ₁₂ between the tips of the inclined portions 291 and 291 is preferably 0.5 to 3 mm narrower than the width d ₆ of the U-shaped half cut 29. Specifically, if the instant food in the container is fried, tip spacing d ₁₂ of the inclined portion 291,291 is preferably a 6-8 mm, the width d ₁₁ of the hot water cut 12 is a 4~7mm Is preferred.

In the example shown in FIGS. 8 to 11, the width d _{6 of} the U-shaped half cut 29, the distance d ₇ between each cut 28 a, 28 b and the U-shaped half cut 29, and the distance d ₈ between the U-shaped half cuts 29. Each is preferably 3 to 10 mm.

As shown in FIG. 8, it is preferable to engrave a hot water cut forming half cut 283 on straight lines 282, 282 extending from the respective ends of the cuts 28a, 28b. Further, as shown in FIG. 9, it is preferable to engrave a hot water cut forming half cut 293 on a straight line 292 extending from the tip of each inclined portion 291 of the U-shaped half cut 29. By engraving the hot cut forming half cuts 283 and 293, the tearability of the lid 2 is improved. However, from the viewpoint of the sealing property of the lid 2 as described above, as shown in FIG. 10, the tip of each inclined portion 291 of the U-shaped half cut 29 and the start end 293 ′ of the hot water cut forming half cut 293 are In the seal portion 25, it must be slightly separated. And the tips of the inclined portions 291,291, is preferably the distance d ₉ between the starting end 293 of the water cuts forming the half-cut 293 'is 1 to 10 mm, and more preferably 2 to 5 mm. The end of each hot water cut forming half cut 283, 293 is preferably a few centimeters from the upper flange portion.

  When the lid body 2 is formed of the easily tearable laminated sheet 20, it is preferable that the easy tear direction substantially coincides with the tear direction of the lid body 2. Thus, when the lid 2 is peeled off with the hot water cut opening forming tab portion 27, the lid 2 extends along the easy tearing direction from the tip of the pair of cuts 28 a and 28 b and the tip of each U-shaped half cut 29. Easily torn linearly. In addition, when the lid body 2 has easy tearability, the hot water cut forming half cuts 283 and 293 can be omitted.

  In the example shown in FIG. 12, the lid 2 has the same layer structure as the laminated sheet 20 shown in FIG. 4, and the partially easy-release layer 23c is a pair of polyethylene layers between the paper sheet 204 and the rigid plastic film 207. It is provided as a part of the adhesive layer 205 between 206a and 206b. The U-shaped half-cut 29 includes a sealant layer 211, an extrusion-laminated polyethylene layer 210, an adhesive layer 209, a light-shielding ink layer 208, a rigid plastic (PET) film 207, and an extrusion-laminated polyethylene layer from the lower surface of the lid 2. It penetrates 206b and reaches the adhesive layer 205.

  As shown in FIG. 13, the hot water cut forming half-cut 283 preferably reaches a part of the paper sheet 204 from the upper surface of the lid 2 and corresponds to at least about 30% of the thickness of the paper sheet 204. It is more preferable that the depth to be reached is reached. Like the U-shaped half cut 29, the hot water cut forming half cut 293 preferably reaches the adhesive layer 205 from the lower surface of the lid 2.

  When the lid 2 is peeled from the container body 1 by holding the hot water cut forming tab portion 27 and the hatched portion 10 is peeled off, a plurality of hot water cuts 12 are obtained as shown in FIG. The strip portion 11 formed of the enclosed portion and its extended portion remains with the portion on the lower surface side of the rigid plastic (PET) film 207 in close contact with the upper end flange portion 1a of the container body 1 due to the partially easy peeling layer 23c. .

  As shown in FIG. 10, the lid 2 is preferably provided with a mark 260 indicating a peeling limit at a position where the instant food (yakisoba or the like) in the container can be efficiently drained without leaking. The position of the mark 260 is preferably set so that the length of the hot water cutout 12 is about 1 to 5 cm. The length of the partially easy peeling layer 23c may be almost the same as the length of the hot water cut opening 12 to be formed.

(3) Third lid FIGS. 15 and 16 show a third lid of the present invention. 15 and 16, the same members or parts as those in FIGS. 1 to 3 are denoted by the same reference numerals. The lid 2 has (a) a plurality of rectangular half-cuts 294 for forming a hot water cut-off formed on the lower side of the lid 2 at a position substantially opposite to the opening tab portion 21, and (b) partial It is the same as the first lid except that the easy peeling layer 23 is provided so as to surround the rectangular half-cut 294 for forming a hot water cut-out.

  In the example shown in FIG. 17, the lid body 2 has the same layer configuration as that shown in FIG. 4, and the partially easily peelable layer 23 is a pair of polyethylene layers 203 a between the curlable plastic film 201 and the paper sheet 204. , 203b is provided as a part of the adhesive layer 202. Also, as shown in FIGS. 17 and 18, the rectangular half-cut 294 for forming a hot water cut end also reaches the adhesive layer 202 from the lower surface of the lid 2.

  For this reason, when eating fried noodles, pour hot water while holding the lid 2 open, and then hold the lid 2 closed for a predetermined time, then open the lid 2 with the opening tab 21 When pulled in the direction, as shown in FIG. 19, the curlable plastic film 201 is completely separated from the lower surface portion of the paper sheet 204 by the partially easy peeling layer 23, and the hot water cut end 12 can be formed.

(4) Other Examples The shapes of the first to third lids are not limited to those shown in the drawings, and various modifications can be made without changing the gist of the present invention.

  FIG. 20 shows the lid body 2 in which a slit-like through hole 221 is provided at a position corresponding to the outer edge of the upper end flange portion 1a in the opening tab portion 21. FIG. The lid body 2 is the same as the first lid body except for the slit-like through hole 221. In the container provided with the lid body 2, when the opened lid body 2 is returned to the original closed position, the upper end flange portion 1 a can be engaged with the slit-like through hole 221, so that resealability is improved. A slit may be provided instead of the slit-shaped through hole 221.

  FIG. 21 shows an example in which a slit-like through hole 221 and another tab portion 222 are provided in the lid 2. The lid 2 is the same as the first lid except for the slit-like through hole 221 and the tab portion 222. By engaging the tab portion 222 with the slit-shaped through hole 221, the opening of the lid body 2 can be held.

  The lid 2 shown in FIG. 22 is affixed to the square instant fried noodle container 1, and an opening tab portion 21 and a hot water cut-off tab forming tab portion 27 are provided at substantially diagonal corners. The structure itself of the lid body 2 is the same as that of the second lid body.

  With respect to the hot water discharge function of the second and third lids, as described in JP-A-2000-109141, a partial easy peeling layer is provided in the region having the hot water cut-off, and the lower side of the lid 2 is partially It is good also as a structure which engraved the some circular half cut for hot water cut opening formation which reaches | attains an easy peeling layer.

[2] Layer Configuration of Lid The layer configuration of the lid 2 of the present invention is not limited, but a preferred layer configuration example other than the example shown in FIG. 12 will be described. A laminated sheet 20 shown in FIG. 23 is the same as the laminated sheet 20 shown in FIG. 4 except that the rigid plastic film 207 is not provided. The laminated sheet 20 shown in FIG. 24 is the same as the example shown in FIG. 4 except that an aluminum foil 212 is used instead of the light-shielding ink layer 208 as a light-shielding layer.

Hereinafter, each layer will be described in detail.
(1) Curl Plastic Film The lid body 2 of the present invention has a curl plastic film 201 outside the paper sheet 204. As the curling plastic film 201, a polyester film is preferable. Examples of the polyester film include films made of polybutylene terephthalate (PBT), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polybutylene naphthalate (PBN), and the like. PBT film and PET film are commercially available at low cost. In particular, a PBT film is preferable because it is excellent in dead hold property, aroma retention property, gas barrier property and heat resistance.

  The PBT film is a saturated polyester film basically composed of 1,4-butanediol and terephthalic acid. However, a diol component other than 1,4-butanediol or a cambonic acid component other than terephthalic acid may be included as a copolymer component as long as physical properties such as heat shrinkage are not impaired. Examples of such a diol component include ethylene glycol, diethylene glycol, neopentyl glycol, 1,4-cyclohexane methanol, and the like. Examples of the dicarboxylic acid component include isophthalic acid, sebacic acid, adipic acid, azelaic acid, and succinic acid. Specific examples of the PBT resin constituting the PBT film include a homo PBT resin commercially available from Toray Industries, Inc. under the trade name “Trecon”.

  The PET film is a saturated polyester film basically composed of ethylene glycol and terephthalic acid. However, a diol component other than ethylene glycol or a cambonic acid component other than terephthalic acid may be included as a copolymer component as long as the properties of the PET film are not impaired. Examples of such diol components include diethylene glycol, 1,4-butanediol, neopentyl glycol, 1,4-cyclohexanemethanol, and examples of the dicarboxylic acid component include isophthalic acid, sebacic acid, adipine, and the like. Acid, azelaic acid, succinic acid and the like can be mentioned. PET films are usually commercially available as biaxially stretched films, such as “LUMIRROR” from Toray Industries, “Toyobo Ester Film” from Toyobo Co., Ltd., “Embret PC” from Unitika Co., Ltd. Has been.

  The polyester film is not limited to one composed of a single resin component, and may be composed of a plurality of resin components. As a combination of resin components, in addition to a combination of a plurality of polyester resins, one or two or more polyester resins may be added with other thermoplastic resins as long as the characteristics are not impaired. Other thermoplastic resins include polyphenylene sulfide (PPS); polyamide (PA); polyimide (PI); polyamideimide (PAI); polyethersulfone (PES); polyetheretherketone (PEEK); polycarbonate; Fluorine resin; Polyolefin such as polyethylene and polypropylene; Polyvinyl chloride; Thermoplastic elastomer and the like. For example, when a PBT film is used as the curl plastic film 201, if the PBT resin, which is a film raw material, contains polyethylene, the film formability during film production is improved, and a PBT film with excellent film thickness uniformity is obtained. can get. When other thermoplastic resins are contained, the ratio is preferably 5 to 20% by mass, more preferably 5 to 15% by mass, based on 100% by mass of the entire polyester film, and 5 to 10% by mass. Is particularly preferred. Therefore, unless otherwise specified, the terms “PET film” and “PBT film” used in the present specification include not only PET or PBT alone, but also compositions comprising PET or PBT + other thermoplastic resins. Should be understood.

  Curl plastic film 201 is a plasticizer, stabilizers such as antioxidants and UV absorbers, antistatic agents, surfactants, colorants such as dyes and pigments, fluidity, depending on the application of instant food containers Additives such as lubricants and inorganic fillers for improving the properties may be appropriately contained.

  The thickness of the curl plastic film 201 is preferably about 5 to 50 μm practically. It is technically difficult to make the thickness of the curl plastic film 201 less than about 5 μm. Further, if the thickness of the curled plastic film 201 exceeds about 50 μm, the cost becomes high. Preferably it is 10-30 micrometers. A PBT film having a thickness of about 5 to 50 μm has sufficient dead hold property, aroma retention property and gas barrier property.

  The thermal shrinkage rate of the PBT film is preferably 2% or less for both MD (machine direction) and TD (width direction). The thermal shrinkage was measured by heating the PBT film to 150 ° C. for 10 minutes. A PBT film having a heat shrinkage of 2% or less can be produced by an air-cooled inflation molding method. As a method for producing a PBT film by an air-cooled inflation molding method, for example, a method described in WO 2004/026558 can be exemplified.

  When a large number of substantially parallel linear marks and / or a large number of fine holes are formed in the curled plastic film 201, the straight tearability of the lid 2 is improved.

(2) Transparent resin coating layer
When a transparent resin coating layer is provided on the upper surface of the PBT film 201, the fine surface irregularities of the PBT film 201 are absorbed to obtain transparency and high definition. Therefore, the printed layer that can be seen through the PBT film 201 becomes beautiful and clear. The transparent resin may be either water-soluble or water-insoluble, but a water-soluble one is preferable in that it does not require the use of an organic solvent. Examples of the water-soluble transparent resin include polyvinyl alcohol, cellulose polymer, polyvinyl pyrrolidone, polyethylene glycol, and polyacrylamide. The polyvinyl alcohol may be modified with an anion, a cation, an acetal or the like, or may be an ethylene-vinyl alcohol copolymer, a partially saponified polyvinyl acetate, or the like. The degree of polymerization of polyvinyl alcohol is preferably 1000 or less.

  Examples of the water-insoluble transparent resin include acrylic resin, polyurethane resin, epoxy resin, polystyrene resin, ultraviolet curable unsaturated acrylic resin, ultraviolet curable unsaturated ester resin, and polycarbonate resin.

  Although the thickness of a transparent resin coating layer is not limited, 1-5 micrometers is preferable and 2-4 micrometers is more preferable. If the thickness of the transparent resin coating layer is less than 1 μm, the improvement in the sharpness of printing is insufficient, and if it exceeds 5 μm, the cost increases.

(3) Paper Sheet The paper sheet 204 functions as a dead hold property imparting layer. The type of paper is not limited and includes synthetic paper. The basis weight of the paper sheet 204 is preferably about 60 to 120 g / m ^2, and more preferably about 75 to 110 g / m ² . If the basis weight of the paper sheet 204 is less than about 60 g / m ² , the paper sheet is too weak to provide sufficient dead hold property. On the other hand, even if the basis weight of the paper sheet 204 exceeds about 120 g / m ² , only the cost increases and no further improvement in dead hold property is recognized.

(4) Rigid plastic film The rigid plastic film 207 is preferably made of a PET film. In order to increase the linear tearability of the lid 2, it is preferable to use a biaxially oriented PET film having a different uniaxial orientation or orientation degree as the PET film. Biaxially oriented PET films with different degrees of orientation are commercially available as “Emblet PC” (Unitika Ltd.). Further, when a large number of substantially parallel linear marks and / or a large number of fine holes are formed in the rigid plastic film 207, the straight tearability of the lid 2 is improved. The direction of straight tearability of the lid 2 is preferably parallel to the opening half cuts 24a, 24b. What is necessary is just to set the thickness suitably as needed.

(5) Light-shielding imparting layer The lid 2 has a light-shielding ink layer 208 or an aluminum foil 212 in order to prevent deterioration of instant food due to sunlight or ultraviolet rays. The light shielding ink 208 is not particularly limited as long as it is an ink containing a black or dark pigment or dye such as carbon black. The light-shielding ink layer 208 has an advantage that there is no adverse influence on the environment during the incineration process, and also has an advantage that the metal foreign matter in the sealed container can be detected by a metal detector. Therefore, not only the safety of instant food is further increased, but also the inspection cost can be significantly reduced by using a metal detector. The aluminum foil 212 has excellent light shielding properties, gas barrier properties, aroma retention properties, and the like.

  The thickness of the light-shielding ink layer 208 depends on the concentration of the black pigment or dye in the ink, but generally only needs to be sufficient to block ultraviolet rays and visible light. The thickness of the aluminum foil 212 is preferably 3 to 15 μm, and more preferably 7 to 12 μm.

(6) Sealant layer The layer heat-sealed to the upper end flange portion 1a of the container body 1 is a sealant film 211 or a hot melt layer. The sealant film 211 can be formed of a polyethylene film, an unstretched polypropylene film, an ionomer resin film, a polystyrene film, or the like. The sealant film 211 preferably has an easy peel property so that the lid 2 can be easily peeled from the container body 1. Therefore, it is preferable that the sealant film 211 has a relatively weak thermal adhesiveness. A known hot melt can be used.

  As the sealant film 211, for example, a laminated film having a polyethylene base film and a low molecular weight polyethylene film in this order from the paper sheet 204 side can be used. The thickness of the polyethylene base film is preferably about 10 to 40 μm, more preferably about 20 to 30 μm. The thickness of the low molecular weight polyethylene film is preferably about 5 to 20 μm, more preferably about 7 to 15 μm. Such a laminated polyethylene film is commercially available, for example, as 760FD (manufactured by Toray Synthetic Film Co., Ltd.). As the sealant film 211, a film made of a mixture of ethylene-vinyl acetate copolymer (EVA) and polyethylene can also be used. In the film made of this mixture, linear low density polyethylene (LLDPE) is preferable as the polyethylene. The thickness of the film made of this mixture is also preferably about 10 to 40 μm, more preferably about 20 to 30 μm. The thickness of the hot melt layer is preferably 10 to 50 μm, more preferably 20 to 40 μm.

A linear ethylene / α-olefin copolymer obtained by copolymerizing ethylene and an α-olefin having 3 to 18 carbon atoms as the sealant film 211 [Density (JIS K6922): 0.870 to 0.910 g / cm ³ , MFR (JIS K6921, 190 ° C., 2.16 kg load): 1 to 100 g / 10 min] and a sealant film (Japanese Patent Laid-Open No. 2004-26190) made of a resin composition containing polystyrene. When the lid 2 having a heat seal layer made of this sealant film is heat sealed to the container main body 1, both sealing performance and easy opening performance can be achieved.

  In order to impart excellent linear tearability to the lid 2, a number of substantially parallel linear marks and / or a number of micropores may be formed in the sealant film 211.

(7) Adhesive layer The adhesive layer is not particularly limited, but is preferably made of a film-like plastic having adhesiveness. For example, in the case where a printing layer such as letters and designs is provided on the upper surface of the paper sheet 204, it is preferable to use a transparent adhesive for the layers 202 and 203 (203a, 203b) for bonding the curl plastic film 201 and the paper sheet 204. The transparent adhesive is not particularly limited as long as it has transparency. For example, polyurethane resin (for example, trade name “Rockbond RU-40”, manufactured by Rock Paint Co., Ltd.), epoxy resin, acrylic resin, ethylene-vinyl alcohol Examples thereof include a copolymer resin (EVA), a polyvinyl acetal resin (for example, polyvinyl formal, polyvinyl butyral (PVB resin), modified PVB, etc.), a vinyl chloride resin, and the like.

  For the adhesive layers 205, 206 (206a, 206b), 208, and 209 below the paper sheet 204, hot melt, extrusion-laminated polyethylene, or the like can be used.

(8) Partially easy peelable layer The material that forms the partially easy peelable layer 23 is acrylic resin, polyamide resin, polyester resin, butyral resin, vinyl chloride-vinyl acetate copolymer, ethylene-vinyl acetate copolymer, nitrification. Cotton etc. If necessary, a small amount of silicone, wax or the like may be added. The easy release layer can be formed by printing an ink containing the above material on the paper sheet 204 or the PBT film 201. The partially easy-release layer 23 may be formed by applying to the upper surface or the lower surface of the adhesive layer. However, as shown in FIG. 5, the point-like easy-release resin may be uniformly distributed in the adhesive layer. good. Since the partially easy peeling layer 23 must be accurately positioned with each half-cut 24c, 24d, 29, 283, 293 and 294, when forming the original fabric (laminate sheet 20) of the lid 2, It is preferable to produce it by a method such as gravure printing in alignment with the printed layer of the sheet 204 or the plastic film 201.

[3] Pre-processing of each film
(1) Formation of linear marks In order to increase the tearability of the lid body 2, a plurality of substantially the same methods are applied to at least one of the curled plastic film 201, the rigid plastic film 207 and the sealant film 211 by the method described below. Parallel linear marks may be formed.

  In order to achieve both film strength and good linear tearability, the depth of the linear marks is preferably 1 to 40% of the thickness of each film, specifically 0.1 to 10 μm. preferable. The width of the line marks is preferably 0.1 to 10 μm, and the interval between the line marks is preferably 10 to 200 μm.

  In order to form a linear mark on each of the films 201, 207 and 211, for example, a method disclosed in WO 03/091003 can be employed. In this method, a large number of substantially parallel linear marks are formed on a film by sliding the film continuously running against a roll or plate having a number of fine particles having a Mohs hardness of 5 or more on the surface. As the fine particles, diamond fine particles are preferable. As a means for pressing the film against the roll or plate, a means for blowing air or a brush slidably contacting the film is preferable. Since the linear trace obtained by this method does not penetrate the film, even if the PET film on which the linear trace is formed is used as the rigid plastic film 207, sufficient fragrance retention and gas barrier properties can be ensured. .

  The linear trace is preferably formed entirely on at least one side of each of the films 201, 207 and 211. Accordingly, each of the films 201, 207, and 211 is given a linear tearability in one direction regardless of the orientation of the film itself, and can be split linearly along a linear mark from any part.

(2) Formation of micropores In order to increase the tearability of the lid body 2, a large number of micropores are formed on the entire surface of at least one of the curling plastic film 201, the rigid plastic film 207 and the sealant film 211 by the method described below. You may form in.

The micropores preferably have an average opening diameter of 0.5 to 100 μm and a distribution density of about 500 holes / cm ² or more. If the distribution density of the micropores is less than about 500 holes / cm ² , the tearability is insufficient. From the viewpoint of film strength, the distribution density of micropores is more preferably 1 × 10 ³ to 1 × 10 ⁴ holes / cm ² , particularly 1 × 10 ^{3 to} 5 × 10 ³ holes / cm ^2. preferable.

  In order to form micropores in each of the films 201, 207 and 211, for example, methods disclosed in Japanese Patent No. 2063411 and Japanese Patent Application Laid-Open No. 2002-59487 can be employed. For example, in the method of Japanese Patent No. 2063411, a first roll (same as the above-mentioned linear trace forming roll) in which a large number of fine particles having a Mohs hardness of 5 or more having sharp corners adhere to the surface is smooth. Since the film passes while receiving a uniform pressing force with the second roll, many fine holes are formed in the film. As the second roll, an iron-based roll, a stainless-based roll, a special steel roll or the like subjected to Ni plating, Cr plating, or the like can be used.

  When forming the fine holes in the sealant film 211, the fine holes may be either through holes or non-through holes. When the fine holes are provided in the curl plastic film 201 or the rigid plastic film 207, the fine holes are preferably non-through holes from the viewpoint of sealing performance of the container. By adjusting the pressing force between the first roll and the second roll, one or both of the through hole and the non-through hole can be formed.

[4] Method for manufacturing lid
(1) Manufacturing method of laminated sheet For example, when forming the laminated sheet 20 shown in FIG. The curled plastic film 201 is laminated on the upper surface side, and the laminated film of the rigid plastic film 207, the light-shielding ink layer 208, and the sealant film 211 is laminated on the lower surface side. Each film 207 or 211 may be preliminarily provided with a number of substantially parallel linear marks and / or a number of fine holes as required. The easy tearing direction of each film 207 or 211 is matched with the longitudinal direction of the long paper sheet 204.

  When the curling plastic film 201 is laminated on the paper sheet 204, the curling plastic film 201 is adhered to the paper sheet 204 in a state where the MD direction stretching in the elastic deformation region (elongation of 1 to 3%) is performed. preferable. Thereby, curl property can be imparted to the laminated sheet 20.

  In order to perform 1 to 3% stretching, it is sufficient to apply a tension of 10 to 20 kgf / m width to the curl plastic film 201. When the curl plastic film 201 is bonded to the paper sheet 204 without being stretched, the tension applied to the curl plastic film 201 is 5 kgf / m width or less. PBT is suitable as the resin that can be stretched so as to be elastically deformable.

  Since the laminated sheet 20 bonded to the paper sheet 204 while applying tension to the curl plastic film 201 has curl properties that warp the curl plastic film 201, the laminate sheet 20 is wound with the curl plastic film 201 facing outside. As a result, the laminated sheet 20 does not substantially curl when unwound (of course, the laminated sheet 20 curls over time). Since the laminated sheet 20 remains flat for a while, there is no hindrance to the work of punching / sealing into the lid 2. When the heat-sealed lid body 2 is peeled off from the container body 1, the lid body 2 is curled.

  When a PBT film is used as the curl plastic film 201, the curl shape can be stored in the laminated sheet 20 by utilizing the shape memory property of PBT. In order to produce the PBT laminated sheet 20 in which the curl shape is memorized, for example, two methods described in WO 2004/026577 can be adopted.

In the first method, (a) the laminated sheet 20 including the PBT film is shaped (cold) at a temperature T ₁ that is equal to or lower than the glass transition temperature Tg of the PBT while being held in a curled shape. The shaped laminated sheet 20 is deformed into a flat shape at a temperature T ₂ exceeding Tg, and (c) is cooled to a temperature T _{3 that is} equal to or lower than Tg and fixed to the flat shape. The second method is (a) (i) shaping the laminated sheet 20 containing the PBT film while maintaining the curl shape at a temperature T _{4 above} Tg to less than the melting point, or (ii) curling the PBT film. After shaping at a temperature T ₄ while maintaining the shape, a laminated sheet 20 having a curled shape is produced by laminating with a film laminate including the paper sheet 204, and (b) the shaped laminated sheet 20 is Tg or less. secured to curled shape is cooled to a temperature T ₅ of, (c) to deform into a flat shape at a temperature T ₆ of the shaped laminated sheet 20 Tg ultra ~T less than _4, (d) Tg below the temperature T ₇ And cooling to a flat shape. The shape memory PBT laminated sheet 20 produced by these methods is flat, but the punched / heat-sealed lid body 2 has recovered its curl property, and curls when peeled from the container body 1.

(2) Punching / half-cut processing As shown in FIG. 25, when the laminated sheet 20 is placed with the curling plastic film 201 side up and punched / half-cut with a plurality of punches, multiple The lid body 2 can be manufactured. The punching / half-cutting process itself can be performed by a known method. The directions of the U-shaped half cut 29 and the hot cut forming half cuts 283, 293, and 294 are made to coincide with the longitudinal direction of the long paper sheet. The punching process and the half-cut process may be performed simultaneously or continuously.

  As mentioned above, although this invention was demonstrated with reference to drawings, this invention is not limited to them, A various change can be added unless the meaning of this invention is changed. For example, the position in the layer of the partially easy release layer may be anywhere as long as the peeled one has a large curl property.

1 ... Container body
1a ・ ・ ・ Upper flange part 2,200,300 ・ ・ ・ Cover 2c ・ ・ ・ Jagged fracture surface of paper sheet
20 ... Laminated sheet
201 ・ ・ ・ Curl plastic film
202, 203, 203a, 203b, 205, 206, 206a, 206b, 209, 210 ... adhesive layer
204 ・ ・ ・ Paper sheet
207 ... Rigid plastic film
208 ... Light-shielding ink layer
211 ・ ・ ・ Sealant film
212 ... Aluminum foil
21 ・ ・ ・ Tab for opening
221 ... Slit through hole
222 ・ ・ ・ Another opening tab
23,23c ・ ・ ・ Partially easy release layer
24c ・ ・ ・ Circular half cut for pouring gate formation
24d ・ ・ ・ Half cut for peeling tab
25 ・ ・ ・ Seal part
25a ・ ・ ・ Center line of seal part
26, 260 ... mark
27 ... Tab section for hot water cut opening
28a, 28b ... cut
280a, 280b ・ ・ ・ Linear part of the cut
281a, 281b ・ ・ ・ Inclined tip of cut
282 ... Extension line
283 ・ ・ ・ Half cut for hot water cut
29 ... U-shaped half cut
290 ・ ・ ・ Connecting part
291 ... Inclined part
292 ... Extension line
293 ・ ・ ・ Half cut for hot water cut
293 '・ ・ ・ Start end of half cut for hot water cut
294 ・ ・ ・ Rectangle half-cut for hot water cut-off 3 ・ ・ ・ Flap part
31 ・ ・ ・ All layers of the flap
32 ・ ・ ・ Curl part
3c: Jagged fracture surface of paper sheet layer
10 ・ ・ ・ Peeling part in the vicinity of the tab for forming the hot water cutout (hatched part)
11 ・ ・ ・ Strip part
12 ... hot water outlet
125 ・ ・ ・ Releasable resin

Claims (16)

A container sealing lid having a paper sheet, a curlable plastic layer, and a partially easily peelable layer, and sealed to the container with the paper sheet facing downward from the curlable plastic layer, An opening tab portion provided on the lower surface of the opening tab portion, a tab portion peeling half cut provided on the lower surface side of the opening tab portion, and a lower side of the lid body on the center side of the tab portion peeling half cut. An annular half cut for forming the pouring gate, and the partially easy peeling layer is provided so as to surround the annular half cut for forming the pouring gate, and the curling plastic layer is made of a curling plastic film. And the curlable plastic film is bonded to the paper sheet in a state of being stretched in the machine direction in an elastic deformation region, and the lid body has a curl property. Container sealing lid. The container sealing lid according to claim 1, wherein the partial easy peeling layer is formed from the tab part peeling half cut to a position beyond the center of the lid. Lid. 3. The container sealing lid according to claim 1, wherein the lid is provided with a peeling stop mark, and the partial easy peeling layer is separated from the tab part peeling half cut. A container sealing lid, characterized by being formed up to the position of The container sealing lid according to any one of claims 1 to 3, wherein the lid has a hot water cut forming tab in addition to the opening tab, and the hot water cut forming tab is Each U-shaped half cut has a pair of cuts and a plurality of substantially U-shaped half cuts engraved on the lower side of the lid with the open end facing inward between the cuts Consists of a pair of straight portions and a connecting portion of both straight portions, and the cut and the tip of the U-shaped half cut are both located within the seal portion of the lid, and the U-shaped half cut Between the enclosed part and the straight line extending from the tip of the pair of straight line portions in the opening direction of the hot water cut port forming tab part, a partial easy peeling layer for hot water cut port formation is provided, and the U-shape The half-cut has a depth from the lower surface of the lid to the partially easy release layer And the easy tear direction of the lid body substantially coincides with the direction of the cut, and when the lid body is peeled off from the container main body with the hot water cut opening forming tab portion, the cut and U The lid body is torn from the tip of the half-cut, and a portion on the lower surface side from the partially easy peeling layer for forming the hot water cut opening remains in close contact with the upper end flange portion of the container body to form a plurality of hot water cut openings. A container sealing lid, characterized by being configured as described above. 5. The container sealing lid according to claim 4, wherein the hot water cut opening forming partial easy peeling layer is provided from the U-shaped half cut to a position of a peeling stop mark for the hot water cut opening forming tab portion. A container sealing lid, characterized by comprising: 6. The container sealing lid according to claim 4 or 5, wherein the pair of U-shaped half-cut linear portions are inclined so that the distance between them is narrower toward the front. . The container sealing lid according to any one of claims 4 to 6, characterized in that a pair of line portions inclined so as to increase in distance as it goes forward are provided at the ends of the pair of cuts. A container sealing lid. The container sealing lid according to any one of claims 4 to 7, wherein the distal end of the cut and the distal ends of the pair of straight portions of the U-shaped half cut are on the outer peripheral side with respect to the center line of the seal portion of the lid A lid for sealing a container, which is located in 9. The container sealing lid according to claim 8, wherein the position of the front end of the cut and the front end of the pair of straight portions of the U-shaped half cut within the seal portion is 30 to 50 of the width of the seal portion from the outer periphery. %. A container sealing lid characterized by being in the range of%. In the container sealing lid according to any one of claims 4 to 9, each of the U-shaped half cuts is provided with a hot water cut forming half cut provided in a straight line extending in an opening direction from each tip of the cut. A container sealing lid, wherein a hot water cut forming half cut is provided below the lid along a straight line extending in the opening direction from the tip. The lid for container sealing according to any one of claims 1 to 3, wherein (a) a plurality of rectangular hot water cut forming half-cuts are provided on a lower side of the lid at a position substantially opposite to the opening tab portion. (B) The container-sealing lid, wherein the partially easy-release layer is provided so as to surround the rectangular half-cut for forming the hot water cut-out. 12. The container sealing lid according to claim 1, wherein the curl plastic layer is made of a polybutylene terephthalate film. The container sealing lid according to any one of claims 1 to 12, comprising a curlable plastic layer, a paper sheet, an adhesive layer, a rigid plastic film, and a sealant layer from the upper surface side, wherein the partial easily peelable layer is A container sealing lid, wherein the lid is on an upper surface or a lower surface of the adhesive layer, or in the same plane as the adhesive layer. 14. The container sealing lid according to claim 13, wherein the rigid film is made of a biaxially oriented polyethylene terephthalate film having a uniaxial orientation or a different degree of orientation. The container sealing lid according to any one of claims 1 to 14, wherein the curled plastic film is bonded to the paper sheet in a state in which the curling plastic film is stretched in a machine direction of 1 to 3%. A container sealing lid. The container sealing lid according to any one of claims 1 to 15, wherein the curled plastic film is bonded to the paper sheet in a state where a tension of 10 to 20 kgf / m width is applied. A container sealing lid.

Images