JP2007320580A - Lid material capable of forming fluid passing-through hole and container using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid material in which a hole for passing a liquid therethrough can be formed, the appearance after opening the hole is superb, a paper piece is not fallen from an exposed surface after opening the hole, and the productivity is high, and a container using the same. <P>SOLUTION: The lid material has a surface layer 1, a polyethylene-based film layer 2 laminated in contact with a mixed resin layer 3 in which polyolefin and a cyclic olefin copolymer are blended at a predetermined ratio, and a sealant layer 5 located on a lowest part, and it is constituted of a laminated body in which an interface between the polyethylene film layer 2 and the mixed resin layer 3 is a peeling surface. An unsealing tab 50q and a hole-opening tab 50r are provided on a peripheral edge. A back half-cut 30a for forming a liquid passing-through-hole and a back half-cut 30b for connecting peripheral edges on both sides of the hole-opening tab 50r are provided in the vicinity of the hole-opening tab 50r from the sealant layer 5 side, and each back half-cut reaches the mixed peeling resin layer 3. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a lid member capable of forming a liquid passage hole, and particularly relates to a lid member that is excellent in aesthetics after formation of a liquid passage hole and does not generate paper dust, and a container using the same.

  One type of instant food is cooking by pouring hot water into ingredients and leaving it for a predetermined time before discharging the hot water.

  A container for storing such a food is generally formed so that cooking (pouring and draining) can be performed using the container itself.

  Such a container consists of a container body and a lid, and hot water can be poured into the container body by opening at least part of the lid and exposing part or all of the container opening. It is formed so that hot water can be discharged out of the container.

  Conventionally, as a method of discharging cooked hot water to the outside of the container, the main method is to lift the claw for hot water cutting provided on the covering lid material fitted to the container flange and tilt the container to discharge the hot water to the outside of the container. Met.

  However, this method requires the cook to hold the lid so that the food does not come out of the container with hot water. However, since the ingredients and containers being cooked become hot, the cook may accidentally loosen the force to hold the lid, and the covering lid may come off the container and discharge the ingredients together with hot water. is there.

  For this reason, in recent years, an increasing number of containers employ a method in which an opening is formed in the lid member and hot water is discharged from the opening to the outside of the container.

As a conventional technique related to a lid member capable of forming an opening for hot water cutting, “a method for producing a hot water lid material” disclosed in Patent Document 1 and “with a hot water cutting function” disclosed in Patent Document 2 are disclosed. There is a lid.
In the invention disclosed in Patent Document 1 and Patent Document 2, the lid member is constituted by a laminated structure having an easy peeling interface, and at least one back half cut reaching the easy peeling interface is provided in a closed loop shape in a part thereof Thus, in the region surrounded by the back half-cut when the surface layer is peeled off, the base material layer is also removed together with the surface layer so that an opening is formed.
JP 2005-82166 A JP 2003-104423 A

  However, the invention described in Patent Document 1 is an interface between PP, which is an easily peelable interface, and paper, which is a base material. Therefore, when the opening is formed, the paper is exposed from the lid material remaining on the container body side. For this reason, the invention described in Patent Document 1 may cause some paper scumming on the exposed paper surface, impairing the beauty of the food container, and may generate paper dust from the exposed paper. there were.

  In addition, in order to form a hole by removing a part of the surface layer of the lid member, it is necessary to give the surface layer an appropriate peel strength around the hole. However, in the method using the peeling varnish as in the invention described in Patent Document 2, it is difficult to adjust the desired peeling strength in addition to the increase in the number of steps for the step of forming the peeling varnish layer. , The productivity of the lid will be low.

  The present invention has been made in view of such a problem, and is capable of forming an opening for allowing a liquid to pass therethrough, has excellent aesthetics after the formation of the opening, and generates paper dust from the exposed surface after the opening is formed. An object of the present invention is to provide a highly productive lid material and a container using the same.

  In order to achieve the above object, the present invention provides, as a first aspect, a lid material that is heat-sealed at the peripheral edge of an opening of a container body to close the opening, and includes a surface layer, a polyolefin, and a cyclic olefin copolymer. It has a polyester film layer laminated in contact with a mixed resin layer formed of a mixed resin blended at a predetermined ratio, and a sealant layer located at the bottom, and the interface between the polyester film layer and the mixed resin layer Is formed of a laminated body that becomes a peeling surface, and includes an opening tab and an opening forming tab at the periphery, and at least a back half cut for forming a liquid passage hole is provided in the vicinity of the opening forming tab. The present invention provides a lid member capable of forming a liquid passage hole, characterized in that one and a back half cut connecting the peripheral edge portions on both sides of the opening forming tab are provided from the sealant layer side.

  In any of the above configurations of the first aspect of the present invention, the front half cut is formed from the surface layer so as to divide the laminate into two regions by connecting the two peripheral portions. A back half for forming a liquid passage hole in an area having an opening forming tab on one peripheral edge of the area divided by the above and an opening forming tab on the other peripheral edge. It is preferable that a cut and a back half cut connecting the peripheral edge portions on both sides of the opening forming tab are provided.

  In order to achieve the above object, as a second aspect of the present invention, the container is characterized in that the opening is heat-sealed by the lid material according to any one of the configurations of the first aspect of the present invention. Is to provide.

  According to the present invention, it is possible to form a liquid passage hole that can form an opening for allowing a liquid to pass therethrough, has excellent aesthetics after the opening is formed, and does not generate paper dust from the exposed surface after the opening is formed. A lid material that can be formed and has high productivity and a container using the same can be provided.

[Composition of laminated structure material]
FIG. 1A shows the structure of a laminated structure material used as a lid material in the present invention.
The lid material is configured using a laminated material in which a surface layer 1, a polyester film layer 2, a mixed resin layer 3, an intermediate layer 4, and a sealant layer 5 are laminated in order from the surface layer side (outside of the container). In the following description, the direction that is the outer side of the container is defined as the upper side, and the direction that is the inner side of the container is defined as the lower side. In addition, although the same effect is acquired even if it is the layer structure which replaced the polyester-type film layer 2 and the mixed resin layer 3 as shown in FIG.1 (b), the following description is shown in FIG.1 (a). Perform based on layer structure. Regardless of which of the polyester film layer 2 and the mixed resin layer 3 is on the upper side, an adhesive layer 6 is provided on the opposite side of the mixed resin layer 3 from the polyester film layer 2 as necessary.

  As the surface layer 1, polypropylene resin, polyamide resin, polyester resin, saponified ethylene-vinyl acetate copolymer, polyvinylidene chloride, polycarbonate and other plastic films or sheets, aluminum, iron, copper, and the main components thereof A metal foil such as an alloy or a metal plate, cellophane, paper, woven fabric, non-woven fabric, or the like can be used, and these may be laminated by selecting a single layer, or one or more. In consideration of dimensional stability, heat resistance, mechanical strength, printing suitability, etc., it is preferable to use polyethylene terephthalate (PET), biaxially oriented polypropylene (OPP), or nylon (Ny).

As the polyester film layer 2, a known polyester film can be used, but it is preferable to use a PET film as a material. The polyester film layer 2 preferably has a surface wetting tension of 3.5 × 10 ⁻² N / m (35 dyn / cm) or more and 6.0 × 10 ⁻² N / m (60 dyn / cm) or less. It is particularly desirable that the wetting tension is 4.0 × 10 ⁻² N / m (40 dyn / cm) or more and 5.0 × 10 ⁻² N / m (50 dyn / cm) or less. The reason for this is that if the surface wetting tension is less than 3.5 N / m, the adhesive strength is reduced, and if it exceeds 6.0 N / m, the adhesive strength is improved. This is because it becomes difficult to adjust the peel strength.
In addition, the interface peeling strength with the mixed resin layer 3 can be adjusted by performing the surface treatment (for example, corona treatment) which changes surface roughness to the side used as the interface with the mixed resin layer 3 as needed.

  The mixed resin layer 3 is a resin that is poured between the surface layer 1, the polyester film layer 2, and the intermediate layer 4 when extruded and sand laminated. The thickness of the mixed resin layer 3 is preferably 10 μm to 30 μm in order to obtain a stable peel property.

In the present embodiment, the mixed resin layer 3 is a resin in which a cyclic olefin copolymer (COC) is mixed with polyolefin at a predetermined ratio. Examples of the polyolefin include polyethylene resin and polypropylene resin, but it is preferable to use low density polyethylene (LDPE). Here, COC is a preparation of a catalyst such as a so-called Ziegler catalyst or a metallocene catalyst in a hydrocarbon solvent such as hexane, heptane, octane, cyclohexane, benzene, toluene, xylene and α-olefin and cyclic olefin. As such a copolymer, there is a trade name “Apel” manufactured by Mitsui Chemicals. As LDPE, there is a trade name “Suntec” manufactured by Asahi Kasei Chemicals Corporation.
The MFR (Melt Flow Rate) of the polyolefin is preferably 1 to 50 [g / min], more preferably 1 to 10 [g / min]. The density of the polyolefin is preferably 0.89 to 0.940 [g / cm ³ ]. The MFR of the cyclic olefin copolymer (COC) is preferably 1 to 40 [g / min], more preferably 5 to 25 [g / min].

  The mixed resin layer 3 can control the interfacial peel strength with the polyester film layer 2 by changing the mixing ratio of the low density polyethylene (LDPE) and the cyclic olefin copolymer (COC). It is possible to adjust.

  The content of the cyclic olefin copolymer (COC) is preferably 1 to 24% by weight, particularly preferably 5 to 20% by weight. This is because when the content is less than 1%, the interfacial peel strength becomes strong, and when it is more than 24%, the peel strength cannot be controlled.

  The intermediate layer 4 is a layer provided for the purpose of improving the strength of the lid member, and aluminum foil, PET, PE, paper, or the like can be used as a single layer or multiple layers. Note that the intermediate layer 4 may not be provided as long as the lid 50 can have a desired strength without the intermediate layer 4. However, it is preferable to provide an intermediate layer 4 including an aluminum foil layer in order to impart a dead hold property to the lid member. In this case, it is more preferable to provide an aluminum foil layer so as to be in contact with the sealant layer 5 because the dead hold property is best exhibited.

  The sealant layer 5 is a layer for bonding (heat-sealing) the lid material to the container body, and the same material as the conventional lid material can be applied. The type of sealant material is selected according to the lowermost layer material of the intermediate layer 4 and the material of the container body 90.

The adhesive layer 6 is made of polyethylene (PE), polypropylene (PP), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), unstretched polypropylene (CPP), EMAA (ethylene-methacrylic acid copolymer resin). It is a layer for preventing the peeling between unintended layers by firmly bonding the mixed resin layer 3 and the adhesive layer 6 using polyolefin such as the material. In addition, as a material, in order to ensure the adhesive strength with the resin for extrusion sand lamination which is a raw material of the mixed resin layer 3, the thing of the same system as resin used for extrusion sand lamination is good. Specifically, when mixing a cyclic olefin copolymer and a polyethylene resin as a resin for extrusion sand lamination, a polyethylene resin is used. When a cyclic olefin copolymer and a polypropylene resin are mixed as a resin for extrusion sand lamination, polypropylene is used. It is recommended to use a resin. Further, in addition to the above, the role of the adhesive layer 6 is to reduce the longitudinal tearing property of the cyclic olefin copolymer contained in the mixed resin layer 3 and prevent longitudinal tearing when peeling from the mixed resin layer 3. Have a role.
The adhesive layer 6 may be a film-like one laminated with the intermediate layer 4 (or the surface layer 1) (wet laminate, non-solvent laminate, dry laminate, extrusion laminate, etc.), or the intermediate layer 4 by a method such as extrusion. You may form in one surface of (or surface layer 1). When using a film-like material, LDPE, LLDPE, CPP, EMAA, PET (an anchor coating treatment is applied to the mixed resin layer 3 side), or the like can be applied. In the case of an extruded resin, LDPE, LLDPE, PP, EMAA, etc. can be applied. If the uppermost layer of the intermediate layer 4 (or the lowermost layer of the surface layer 1) is formed of these materials and the layer itself has a function as an adhesive layer, the adhesive layer 6 is substantially unnecessary. Become.

Next, the half cut formed in the laminated structure material will be described. In the present invention, there are two types of “front half cut” and “back half cut” in the half cut formed in the laminated structure material constituting the lid member. These half-cuts are ideally cut to the interface between the polyester film layer 2 and the mixed resin layer 3, but in consideration of the accuracy of the half-cut, the original function is prevented so that the function as a lid is not lowered. Appropriately, it may be applied according to the contrary.
When the polyester film layer 2 is on the top as shown in FIG. 1A, the front half cut 20 is provided from the surface layer 1 that is the uppermost layer and penetrates at least the polyester film layer 2. However, the front half cut 20 may reach substantially the center of the intermediate layer 4. Further, the back half-cut 30 is provided from the sealant layer 5 which is the lowermost layer and penetrates at least the adhesive layer 6. However, the back half-cut 30 may reach the substantially central portion of the polyester film layer 2.
When the mixed resin layer 3 is on the top as shown in FIG. 1B, the front half cut 20 is provided from the surface layer 1 which is the uppermost layer and penetrates at least the adhesive layer 6. However, the front half cut 20 may reach substantially the center of the intermediate layer 4. The back half-cut 30 is provided from the sealant layer 5 which is the lowermost layer and penetrates at least the polyester film layer 2. However, the back half-cut 30 may reach the substantially central portion of the mixed resin layer 3.

  Hereinafter, a preferred embodiment of the present invention using the laminated structure material shown in FIG. 1A will be described.

A lid member capable of forming a liquid passage hole in which the present invention is suitably implemented will be described.
FIG. 2 shows the structure of the laminated structure 100 that is the material of the lid member 50 in the present embodiment.
The surface layer 1 is a layer for printing a pattern or a pattern, and the pattern or the pattern is printed on the upper surface. The surface layer 1 is made of paper having a basis weight of 85 g / cm ² in order to maintain the strength as a lid.
The polyester film layer 2 is formed using a PET film as a material, and the surface roughness is adjusted to a desired roughness by corona treatment as necessary as described above.
The mixed resin layer 3 is formed using LDPE and a cyclic olefin copolymer as raw materials, and the ratio thereof is 85% for LDPE and 15% for the cyclic olefin copolymer.
The intermediate layer 4 is obtained by extruding and laminating a PE film 6 and an aluminum foil 41 with a PE resin 42.
The thickness of each layer shown in FIG. 2 is an example of the configuration, and is not limited to this value.

A method for manufacturing the laminated structure 100 will be described.
First, a paper material to be the surface layer 1 and a PET film to be the polyester film layer 2 are dry laminated to form the surface layer 1 and the polyester film layer 2. Further, lamination is performed while extruding PE resin 42 between the aluminum foil 41 serving as the intermediate layer 4 and the PE film serving as the adhesive layer 6, and a sealant material is extruded onto the other surface of the aluminum foil 41 to form the sealant layer 5. . In addition, when forming the sealant layer 5 using a sealant film, the sealant film to be the sealant layer 5 may be dry laminated with the aluminum foil 41 in advance.
Thereafter, a laminated structure 100 is completed by laminating a mixed resin of LDPE and a cyclic olefin copolymer (LDPE 85% + cyclic olefin copolymer 15%) between the polyester film layer 2 and the intermediate layer 4 while extruding them.

The front half cut 20 formed in the laminated structure shown in FIG. 2 is ideally cut into the interface between the polyester film layer 2 and the mixed resin layer 3 as long as the function of the lid is not impaired. The depth of cut may be different. In addition, the cut depth of the front half-cut 20 that does not impair the function as a lid in the above configuration is a depth that penetrates at least the polyester film layer 2 and reaches the middle of the adhesive layer 6.
On the other hand, it is ideal that the back half-cut 30 is also cut to the interface between the mixed resin layer 3 and the polyester film layer 2, but the depth of cut is different from this if the function of the lid is not impaired. It doesn't matter. In addition, in the said structure, the cutting depth of the back half cut 30 which does not impair the function as a lid | cover material is a depth which penetrates the adhesive layer 6 and reaches the middle of the polyester-type film layer 2 at least. Since the mixed resin layer 3 is fragile, as long as the back half-cut 30 penetrates at least the adhesive layer 6, an opening can be formed as will be described later.

  As another configuration example of the laminated structure 100, as shown in FIG. 3, a PET film that becomes the surface layer 1 and an LDPE film (or LLDPE film) that becomes the adhesive layer 6 are dry-laminated, and the PET film and paper 41 And the other side of the paper 41 ′ is extruded and laminated with an aluminum foil 43 via PE resin 42, and the other side of the aluminum foil 43 is provided with the sealant layer 5 to form a polyester film layer. 2, the intermediate layer 4 and the sealant layer 5, which are extruded through a mixed resin and laminated. In this configuration, the lower surface (interface with the LDPE film) of the PET film 1 is a printing surface (surface on which a pattern or design is printed).

  Moreover, as another structural example of a laminated structure, as shown in FIG. 4, the paper material 11 used as the surface layer 1 and the PET film 12 and the LDPE film used as the adhesive layer 6 are dry-laminated to form a polyester film layer. The PET film to be 2 and the aluminum foil to be the intermediate layer 4 are dry laminated, and a sealant material layer is formed on the other surface of the aluminum foil to form a sealant layer 5 between the LDPE film and the polyester film layer 2. And a laminate obtained by extruding the mixed resin.

  Further, as still another configuration example of the laminated structure 100, as shown in FIG. 5, the PE resin that becomes the adhesive layer 6 is disposed on one surface of the paper material that becomes the surface layer 1 by a method such as extrusion, The aluminum foil used as the intermediate layer 4 and the PET film used as the polyester film layer 2 were dry laminated, and the polyester film layer 2 and the PET film side of the intermediate layer 4 and the adhesive layer 6 were extruded and used for sand lamination. A mixed resin layer 3 is used, and a sealant layer 5 is formed by laminating a sealant material on the other surface of the aluminum foil of the intermediate layer 4. In this configuration, the upper surface of the paper material is the printing surface.

  Hereinafter, the lid according to the present embodiment will be described in detail on the assumption that the laminated structure 100 having the configuration exemplified first is used as a material.

  6 and 7 show a lid 50 of a container for instant food according to this embodiment. The periphery of the lid member 50 is heat sealed to the container body 90. An opening tab 50 q is provided on the peripheral edge of the lid member 50. An opening forming tab 50r is provided on the side opposite to the position where the opening tab 50q is provided. In the vicinity of the opening forming tab 50r, at least one back half cut 30a for forming a liquid passage hole is formed so as to be positioned in the opening of the container body 90. The shape of the back half-cut 30a is arbitrary. However, the closed half-loop shape is preferable because the area of the liquid passage hole increases and the liquid can pass without stagnation. Is formed in a loop shape. Further, a back half cut 30b is formed at the base of the opening forming tab 50r. Further, the lid member 50 is divided into two regions by connecting the two peripheral edges of the lid member 50, and the front half-cut 20a is positioned so that the opening tab 50q and the hole forming tab 50r are positioned in the respective regions. Is formed.

A method of using the lid member 50 will be described.
When the opening tab 50q is held and a force is applied in a direction away from the container body, the cover member 50 (the entire laminated structure) is removed from the container body 90 at the periphery of the opening tab 50q as shown in FIG. Peel off. As a result, the opening of the container body 90 is exposed, and hot water can be poured into the container. After pouring hot water into the container, the opening is closed again with the lid 50 as shown in FIG. At this time, although not shown, it is preferable that the opening tab 50q is bent and held on the flange portion (opening peripheral edge portion) of the container body 90 so that the gap between the lid member 50 and the container body 90 is made as small as possible.

  When forming the hot water cutting hole as the liquid passage hole, the opening forming tab 50r is held, and a force is applied in a direction away from the container body 90. Then, as shown in FIG. 10, the peeled surface moves to the interface between the mixed resin layer 3 and the polyester film layer 2.

  The lid 50 is further peeled using the interface between the mixed resin layer 3 and the polyester film layer 2 as a peeling surface. When the peeling reaches the back half-cut 30a, it is surrounded by the back half-cut 30a as shown in FIG. Within the region, the mixed resin layer 3, the intermediate layer 4, and the sealant layer 5 are cut out into a shape along the back half cut 30a to form an opening.

  When the lid 50 is further peeled and the peeling reaches the front half cut 20a, the surface layer 1 and the polyester film layer 2 on the opening forming tab 50r side are separated from the front half cut 20a as shown in FIG. Drop off from the lid 50.

  The opening formed in the lid member 50 in this way can be used as a hot water cutting hole.

  When the hot water hole is formed in the lid member 50 according to the present embodiment, the interface between the mixed resin layer 3 and the polyester film layer 2 becomes a release surface. Since the resin surface is exposed at this time, the appearance as a food container (lid material) is not impaired even if a hot water cut hole is formed, and paper dust is not generated. In addition, as described above, when the mixed resin of LDPE 85% + cyclic olefin copolymer 15% is used as the mixed resin layer 3, the peel resistance at the time of opening formation becomes an appropriate value. As a result, an opening is not unexpectedly formed in the lid member 50, or the peeling resistance is too large to make it difficult to form the opening.

  In order to change the peel surface at the back half-cut 30b as a boundary, the peel strength between the mixed resin layer 3 and the polyester film layer 2 is smaller than the peel strength between the sealant layer 5 and the flange portion of the container body 90. It needs to be adjusted. As described above, the laminated structure used as the material of the lid member 50 can easily adjust the peel strength between the mixed resin layer 3 and the polyester film layer 2 by changing the mixing ratio of LDPE and cyclic olefin copolymer. Since it is possible, it is suitable as a material for the lid member 50.

In addition, the said embodiment is an example of suitable implementation of this invention, and this invention is not limited to this.
For example, in the above-described embodiment, the hole forming tab 50r is provided so as to protrude from the flange portion of the container main body 90. However, as shown in FIG. An opening forming tab 50s may be provided. Also in this case, since the process of forming the hot water hole is the same as described above, a duplicate description is omitted.
Moreover, in the said embodiment, although the case where a hot water cutting hole was formed was taken as an example as a cover material used for the container for instant foods, the liquid which a cover material passes does not necessarily need to be hot water, water and oil Other liquids may be used. Of course, it goes without saying that it is not limited to edible liquids.
Moreover, the layer structure illustrated in the said embodiment is an example to the last, and if it has the peeling structure which consists of a polyester-type film layer and a mixed resin layer, another layer structure will not be limited.
Moreover, the process of laminating | stacking the laminated structure used as a cover material is not limited to the example shown in the said embodiment.
Moreover, in the said embodiment, although the structure by which the front half cut 20a was formed in the surface of a cover material was taken as an example, this does not necessarily need to provide.
Furthermore, you may make it let a powder and a fluid (gel) pass through the opening formed in the cover material.
As described above, the present invention can be variously modified.

It is a figure which shows the layer structure of the laminated structure used as the raw material of the cover material concerning this invention. It is a figure which shows the layer structure of the laminated structure used as the material of the cover material concerning suitable embodiment of this invention. It is a figure which shows another layer structure of the laminated structure used as the material of the cover material concerning suitable embodiment of this invention. It is a figure which shows another layer structure of the laminated structure used as the material of the cover material concerning suitable embodiment of this invention. It is a figure which shows another layer structure of the laminated structure used as the material of the cover material concerning suitable embodiment of this invention. It is a figure which shows the structure of the cover material concerning suitable embodiment of this invention. It is a figure which shows the structure of the container using the cover material concerning suitable embodiment of this invention. It is a figure which shows the state which opened the container. It is a figure which shows the state which closed the container opening after opening again with the cover material. It is a figure which shows the state which the peeling surface changed on the back half cut. It is a figure which shows the state where the area | region enclosed by the back half cut of closed loop shape fell out with the surface layer. It is a figure which shows the state which formed the hot water cutting hole in the container. It is a figure which shows another structural example of a cover material.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Surface layer 2 Polyester-type film layer 3 Mixed resin layer 4 Intermediate layer 5 Sealant layer 6 Adhesive layer 11 Paper material 12 PET film 20, 20a Front half cut 30, 30a, 30b Back half cut 41, 43 Aluminum foil 41 'Paper 42 PE resin 50 Lid 50q Opening tab 50r, 50s Opening tab 90 Container body

Claims (4)

A lid that is heat-sealed at the peripheral edge of the opening of the container body and closes the opening,
A surface layer, a polyester film layer laminated in contact with a mixed resin layer formed of a mixed resin in which a polyolefin and a cyclic olefin copolymer are blended at a predetermined ratio, and a sealant layer located at the bottom, It is composed of a laminate in which the interface between the polyester film layer and the mixed resin layer is a release surface,
Provided with a tab for opening and a tab for opening formation at the periphery,
In the vicinity of the opening forming tab, at least one back half cut for forming a liquid passage hole and a back half cut connecting the peripheral edge portions on both sides of the opening forming tab are each the sealant. A lid member capable of forming a liquid passage hole provided from the layer side. A front half cut is formed from the surface layer so as to divide the laminate into two regions by connecting two peripheral portions.
The opening tab is provided on one peripheral portion of the region divided by the front half cut, and the opening forming tab is provided on the other peripheral portion,
A region having the hole forming tab is provided with a back half cut for forming the liquid passage hole and a back half cut connecting the peripheral edge portions on both sides of the hole forming tab. The lid member capable of forming a liquid passage hole according to claim 1.   The said polyester-type film layer is formed with PET film, The cover material which can form the liquid passage hole of Claim 1 or 2 characterized by the above-mentioned.   A container having an opening heat-sealed by the lid member according to any one of claims 1 to 3.

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