JPH11208722A - Lid material and production thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To peel only an outer lid easily and make an opening whose peripheral edge is clear, in an inner lid by composing a lid material sued for a molded container out of the outer lid and the inner lid having an opening-making cut and so on made in specific positions, and by bonding them together so that they are peelable except an area surrounded by th opening-making cut. SOLUTION: The lid material is composed of an outer lid A comprising an outer-lid print layer 11, a paper layer 12, a bondable layer 13, and an aluminum foil layer 14; and an inner lid B comprising a peelable layer 16, a biaxial oriented plastic layer 17, an inner-lid print layer 18, a thermoplastic resin layer 19, and a heat bondable resin layer 20, and having an opening-making cut 1 and a cut 2 for starting peel both of which are made in specific positions. And via a polyethylene layer 15 melted by the application of heat and extruded, the face of the aluminum foil layer 14, and the face of the biaxial oriented plastic layer 17 with the peelable layer 16 formed on it, are bonded together. To make an opening in the lid material, the peeling tab 3 of the lid material is grasped and pulled up to peel the outer lid A, thereby breaking the inner lid B with the opening-making cut 1 and making the opening.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lid material for use in a cup-shaped molded container for packaging snacks and the like, wherein an opening for removing contents is formed in an inner lid by peeling an outer lid. It relates to a possible double lid.

[0002]

2. Description of the Related Art Conventionally, as a lid material of a container having an opening formed in an inner lid by peeling an outer lid, for example,
As described in JP-B-62-12099, an upper coating is releasably laminated on the upper surface of the intermediate strip on which holes for forming openings are formed, and the intermediate strip is formed on the upper surface. On the lower surface, the lower coating is strongly adhered to the intermediate strip and laminated, and the upper coating and the lower coating are completely adhered to each other at the hole of the intermediate strip, and between the upper coating and the intermediate strip. It consists of a configuration in which an unbonded part is formed in a predetermined area, and by peeling the upper coating from the intermediate strip at the unbonded part,
2. Description of the Related Art There is known a lid member having a structure in which a lower coating completely adhered to a hole portion of an intermediate strip is broken so that an opening hole is formed in the intermediate strip. However, in the case of the lid having the above configuration, since the portion forming the opening is the hole provided in the intermediate strip, when the upper coating is peeled from the intermediate strip, the lower coating closing the hole is removed. An opening is formed by breaking, but in addition to requiring a strong force to break the lower coating, the lower coating is difficult to break sharply at the periphery of the hole, so the periphery of the hole is clean In addition to the disadvantages, it is difficult to form a trigger for peeling off the upper coating. Further, when forming a printing layer, a point picture synchronized with the upper coating and the lower coating cannot be formed, so that there is a disadvantage that a lid material having excellent design properties cannot be obtained.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to form an opening having a beautiful peripheral edge on an inner lid by simply peeling off only an outer lid, and to provide a point picture synchronized with each of the outer lid and the inner lid. The object of the present invention is to provide a lid material for a container which is excellent in design and can be made.

[0004]

An outer lid and an inner lid in which a cut for forming an opening and a cut for forming a peeling start portion are formed at predetermined positions, wherein the inner surface of the outer lid and the outer surface of the inner lid are formed. Since the lid material is configured to be releasably bonded except for the area surrounded by the opening forming cuts, the outer cover is peeled from the inner lid from the portion where the peeling start forming cuts are formed. Since the area surrounded by the opening forming cut of the inner lid is broken and removed while being adhered to the outer lid, the opening can be easily formed in the inner lid.

[0005] In the above-mentioned lid material, a structure may be employed in which a peeling layer is formed on the outer surface of the inner lid corresponding to a region where the inner surface of the outer lid and the outer surface of the inner lid are peelably bonded, or When the adhesive layer is formed on the outer surface of the inner lid corresponding to the area surrounded by the notch for forming the part, when the outer lid and the inner lid are laminated by a polyethylene layer or the like, the polyethylene layer and the inner layer are laminated. Since the adhesive strength between the areas surrounded by the opening forming cuts of the lid, and the adhesive strength between the polyethylene layer and the area other than the area surrounded by the opening forming cuts of the inner lid can be arbitrarily changed, An opening can be easily formed in the inner lid by peeling the outer lid from the inner lid.

[0006] In the above-mentioned lid material, the opening-forming cut is formed by intermittent cuts and reaches the adjacent cut when the rear end of each of the cuts in the opening direction excluding the last end is extended in the opening direction. By doing so, when the outer lid is peeled off from the inner lid, the opening-forming cuts can be broken with a weak force to form a clean opening.

In the above-mentioned lid material, the outer lid comprises an outer lid printing layer, a paper layer, an adhesive layer, and an aluminum foil layer, and the inner lid comprises a biaxially stretched plastic layer, an inner lid printing layer, and a heat-adhesive resin layer. With this configuration, the lid material is less curled in a state where the lid material is punched into a predetermined shape, has excellent filling suitability when the lid material is supplied onto the container, and has a superior barrier property.

In the above-mentioned lid material, by forming the outer lid print layer and the inner lid print layer in synchronization with each other, a point pattern can be printed at a predetermined position, so that the lid is excellent in design. Material.

A step of forming an inner lid printing layer by printing on one surface of the roll-shaped biaxially stretched plastic layer, a step of laminating a thermoadhesive resin layer on the inner lid printing layer surface of the biaxially stretched plastic layer, A step of forming a cut for forming an opening and a cut for forming a peeling start portion in a predetermined area to produce an inner lid laminate, and separately laminating a roll-shaped paper layer and an aluminum foil layer to produce an outer lid laminate Forming a lid material laminate by laminating the aluminum foil layer surface of the outer lid laminate and the biaxially stretched plastic layer surface of the inner lid laminate with a hot-melt extruded polyethylene layer; Material laminate 2
Cutting a sheet at a predetermined position corresponding to the inner lid printing layer of the axially stretched plastic layer, forming an outer lid printing layer by printing on the paper layer surface of the cut lid material laminate, By manufacturing with a method including a step of punching into a material shape, the pattern of the outer lid printing layer and the inner lid printing layer can be synchronized, so that a lid material having a point design and excellent design properties can be manufactured. Becomes possible.

[0010] In the above-mentioned method for manufacturing a lid material, the step of forming an inner lid printing layer on one surface of the roll-shaped biaxially stretched plastic layer by printing includes simultaneously forming the inner lid printing layer on the other surface of the biaxially stretched plastic layer. By using a method in which a release layer or an adhesive layer is printed and formed in a predetermined region corresponding to the lid print layer, the release layer or the adhesive layer can be formed at a predetermined position on the outer surface of the inner lid.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a back surface showing an embodiment of a lid material of the present invention, FIG. 2 is a cross-sectional view taken along line II in FIG. 1 showing a laminated structure of the first embodiment, and FIG. FIG. 4 is a cross-sectional view showing a state in which the outer lid of the lid material of the first embodiment is peeled off. FIG. 4A is a cross-sectional view of the peeled outer lid, and FIG. FIG. 5 is a cross-sectional view showing the inner lid in a bonded state, FIG. 5 is a cross-sectional view showing a state in which the lid of the second embodiment is bonded to a container, and FIG. 6 is a state in which the outer lid of the lid of the second embodiment is peeled off. (A) is a cross-sectional view of the peeled outer lid, (b) is a cross-sectional view of the inner lid in a state of being adhered to the container, 1 is a cut for forming an opening, and 2 is a peeling start portion. Notch for forming, 3 for release tab, 4 for container, 5 for thermal bonding, 6 for opening, 11 for outer lid printing layer, 12 for paper layer, 13 for adhesive layer, 14 for aluminum foil layer, 15 for polyether Tylene layer,
16 is a release layer, 17 is a biaxially stretched plastic layer, 18 is an inner lid printing layer, 19 is a thermoplastic resin layer, 20 is a thermoadhesive resin layer, 21 adhesive layers, A is an outer lid, and B and B ′ are Each represents an inner lid.

FIGS. 1 and 2 show a first embodiment of a lid member according to the present invention.
As shown in FIG. As shown in FIG. 1, the planar shape of the back side is a substantially circular shape in which an outer lid A and an inner lid B are laminated so as to be peelable, and an arc-shaped peeling start portion forming cut is formed at one end on the peripheral edge. A peeling tab 3 protruding through the opening 2 is formed, and an opening forming cut 1 is formed at a position near an edge facing the peeling tab 3. The opening forming cut 1 and the peeling start forming cut 2 are formed so as to penetrate the inner lid B. In the first embodiment, the cut 2 for forming the peeling start portion is formed by a continuous cut, and the cut 1 for forming the opening is formed of an intermittent cut as shown in FIG. When the rear end in the opening direction of the cut is extended in the opening direction, it is shaped to reach the adjacent cut. The shape of the opening forming cut 1 is arbitrary, and may be formed by a normal perforation. Regarding the opening-forming cuts 1, the number, size, shape, and position of the cuts to be formed are arbitrary, and may be appropriately determined depending on the application.

As shown in FIG. 2, the laminating structure of the first embodiment includes, in order from the outer surface, an outer cover printing layer 11, a paper layer 12, and an adhesive layer 13.
And an aluminum lid layer 14, an outer lid A, a release layer 16, a biaxially stretched plastic layer 17, an inner lid printing layer 18, a thermoplastic resin layer 19, Cut 1 for forming an opening at a predetermined position, which is made of an adhesive resin layer 20
The inner lid B on which the cut 2 for forming the peeling start portion is formed is formed by the hot melt extruded polyethylene layer 15 to form the aluminum foil layer 14 on the inner face of the outer lid A and the peeling layer 16 on the outer face of the inner lid B. In this configuration, the surface of the biaxially stretched plastic layer 17 is adhered. With this configuration, the polyethylene layer 15
However, the polyethylene layer 15 and the surface of the biaxially stretched plastic layer 17 adhere more strongly in the region where the release layer 16 is not formed than in the region where the release layer 16 is formed. The polyethylene layer 15 and the aluminum foil layer 14 on the inner surface of the outer lid A are strongly adhered by means such as providing an anchor coat on the aluminum foil layer 14. In the first embodiment, a thermoplastic resin layer is formed on the surface of the biaxially stretched plastic layer 17.
Although the thermo-adhesive resin layer 20 is laminated via the intermediary 19, a configuration without the thermoplastic resin layer 19 may be adopted. Outer lid printing layer
The 11 and the inner cover printing layer 18 are provided at predetermined positions of the cover material in a synchronized state.

As shown in FIG. 3, the lid material according to the present invention is used in a state in which the inner surface of the inner lid B constituting the lid material is thermally bonded to a flange portion of a plastic container made of a foamed circular polystyrene having a flange. It is attached by heat bonding with the conductive resin layer 20. The thermal bonding portion 5 is formed in a circular shape with a predetermined width at a position inside the peripheral edge of the lid material. When the lid material is attached to the plastic container with the thermal bonding portion 5, the cut 2 for forming the peeling start portion is located outside the thermal bonding portion 5, or the center of the cut 2 for forming the peeling start portion is thermally bonded. A separation start portion forming cut 2 is provided at a predetermined position of the lid so as to be located in the portion 5.

In order to form the opening 6 by peeling the outer lid A of the lid material according to the present invention, the user grips the release tab 3 of the lid material and pulls it upward. The tab 3 is in a state in which the inner lid B is adhered to the outer lid A, and the outer lid A is peeled off from the inner lid B between the polyethylene layer 15 and the release layer 16 inside the cut 2 for forming the peeling start portion. come. When the inner lid B is further peeled off, the outer lid A is adhered to the outer lid A in a state where the inner lid B at the portion to become the opening 6 surrounded by the opening forming notch 1 is adhered to the outer lid A, as shown in FIG. It can be completely peeled off from the inner lid B. Since the adhesion between the biaxially stretched plastic layer 17 and the polyethylene layer 15 in the region surrounded by the opening forming cut 1 is stronger than the strength required to break the opening forming cut 1, By peeling the outer lid A, the inner lid B can be broken at the opening forming cut 1 to form the opening 6. When the outer lid A is peeled and removed by grasping the part of the peeling tab 3, as shown in FIG.
An opening 6 is formed in the flange of the container 4, and the inner lid B from which the portion of the stripping tab 3 has been removed is adhered.
The contents can be taken out. In the case of using the biaxially stretched polyethylene terephthalate as the biaxially stretched plastic layer 17 in the laminated structure of the first embodiment,
Even if the release layer 16 is not formed partially on the biaxially stretched polyethylene terephthalate surface on the outer surface of the inner cover B, the outer cover A can be replaced with the inner cover B.
It can be adhered to a moderate strength that can be peeled off.

FIGS. 1 and 5 show a second embodiment of the lid material according to the present invention.
And the shape is the same as that of the first embodiment. As shown in FIG. 5, the laminated structure of the second embodiment includes an outer lid A composed of an outer lid print layer 11, a paper layer 12, an adhesive layer 13, and an aluminum foil layer 14 in order from the outer surface, and an opening forming cut 1 Adhesive layer partially formed corresponding to the area surrounded by
A cut 1 for forming an opening and a cut 2 for forming a peeling start portion are formed at predetermined positions. The inner lid B ′ is biaxially stretched by forming the aluminum foil layer 14 on the inner surface of the outer lid A and the partial adhesive layer 21 on the outer surface of the inner lid B ′ by the hot melt extruded polyethylene layer 15. This is a configuration in which the surface of the plastic layer 17 is bonded. That is, the lid material of the second embodiment is different from the lid material in that the adhesive layer 21 is partially formed instead of the release layer 16 on the surface of the biaxially stretched plastic layer 17 which is the outer surface of the inner lid B ′. Have the same configuration.
In this case, the adhesive layer 21 formed on the surface of the biaxially stretched plastic layer 17 corresponding to the region surrounded by the opening forming cut 1
The surface and the polyethylene layer 15 can be strongly bonded to each other. Therefore, the biaxially stretched plastic layer 17
Even when biaxially stretched polypropylene having poor adhesion to the polyethylene layer 15 is used, the region surrounded by the opening-forming cut 1 can be strongly bonded. Since the adhesion between the biaxially oriented polypropylene and the hot melt extruded polyethylene layer 15 is not strong, the outer lid A is replaced with the inner lid B ′.
Can be easily peeled off.

In the cover member of the second embodiment, the outer cover A
FIG. 6 shows the state in which is peeled off. The method of peeling the outer lid A from the inner lid B is the same as that of the first embodiment, but the peeling interface is different. In peeling the outer lid A, when the tab 3 for peeling is grasped and pulled upward, as shown in FIG. 6A, the polyethylene layer 15 and the biaxially stretched plastic layer 17 of the inner lid B ′ are peeled. The polyethylene layer 15 and the adhesive layer 21 provided on the surface of the biaxially stretched plastic layer 17 are strongly adhered to each other in a portion surrounded by the opening forming cuts 1, so that the opening forming cuts 1 are formed. The outer lid A is peeled off in a state where the inner lid B ′ is broken and the portion surrounded by the opening forming cut 1 is adhered to the outer lid A. The state where the outer lid A is peeled off and removed to form the opening 6 is the same as that of the first embodiment as shown in FIG.

The material constituting the cover material of the present invention is not particularly limited, but the outer cover A has a structure comprising an outer cover print layer, a paper layer, an adhesive layer, and an aluminum foil layer. It is preferable that the inner lids B and B 'have a configuration including a biaxially stretched plastic layer, an inner lid printing layer, and a thermoadhesive resin layer. As the biaxially stretched plastic layer, biaxially stretched polyethylene terephthalate, biaxially stretched polypropylene, biaxially stretched Nanron, or the like can be used. As the heat-adhesive resin layer, an ethylene-vinyl acetate copolymer-based resin, a carboxylic acid-modified polyolefin-based resin, or the like can be used. The heat-adhesive resin layer may be directly laminated on the inner lid printing layer surface of the biaxially stretched plastic layer constituting the inner lids B and B ′, or may be provided via a thermoplastic resin layer such as polyethylene as in the present embodiment. They may be stacked. Examples of the resin that can be used as the release layer include an acrylic resin, a nitrified cotton resin, and the like. As the adhesive layer, a layer made of a urethane resin can be used. As a specific laminated structure of the lid material of the present invention, for example, from the outer surface, an outer lid print layer / 79 g of single art (corona treatment) / polyethylene 15 μ / aluminum foil 7 μ / polyethylene 2
0 μ / release layer or adhesive layer / polyethylene terephthalate 12 μ / printed inner lid layer / polyethylene 25 μ / heat-adhesive resin 25 μ.

The method for producing the lid material of the present invention will be described below. An inner lid printing layer is formed on one surface of the roll-shaped biaxially stretched plastic layer by gravure printing. A thermoplastic resin layer and a thermo-adhesive resin layer are laminated on the inner lid printing layer surface of the biaxially stretched plastic layer. In this case, a thermoadhesive resin layer may be directly laminated on the surface of the inner lid printing layer of the biaxially stretched plastic layer. An opening forming cut and a peeling start forming cut are formed at predetermined positions corresponding to the inner cover printing layer of the above-mentioned laminate to produce an inner cover laminate. On the other hand, a roll-shaped paper layer and an aluminum foil layer are laminated with an adhesive layer, and the aluminum foil layer surface of the laminate and the inner lid laminate having an opening forming cut and a peeling start forming cut are formed. An axially stretched plastic layer surface is laminated with a hot melt extruded polyethylene layer to produce a lid laminate. The lid material laminate obtained above is cut into a sheet at a predetermined position corresponding to the inner lid print layer. An outer lid printing layer is printed on the paper layer surface of the cut sheet-like lid material laminate by offset printing or the like using an ultraviolet curable ink. Finally, the cover material of the present invention can be manufactured by punching out the shape of the cover material.
By manufacturing according to this method, the pattern of the outer lid print layer and the inner lid print layer can be synchronized, so that a lid material having excellent design properties can be manufactured.

In the above method, the aluminum foil layer of the outer lid and the biaxially stretched plastic layer of the inner lid are laminated with a polyethylene layer without forming a release layer or an adhesive layer on the biaxially stretched plastic layer of the inner lid. However, in the case where a release layer or an adhesive layer is formed on the surface of the biaxially stretched plastic layer, a printing step of forming an inner cover printing layer on one surface of the biaxially stretched plastic layer by printing is described. Thus, it can be manufactured by a method of printing a release layer or an adhesive layer at a predetermined position corresponding to the inner lid printing layer on the other surface of the biaxially stretched plastic layer. According to this method, the release layer or the adhesive layer can be formed by accurately positioning the inner cover at a predetermined position on the surface of the biaxially stretched plastic layer.

[0021]

The present invention comprises an outer lid, and an inner lid in which a cut for forming an opening and a cut for forming a peeling start portion are formed at predetermined positions.
Since the inner surface of the outer lid and the outer surface of the inner lid are releasably bonded except for a region surrounded by the notch for forming the opening, the outer surface is separated from the portion where the notch for forming the peeling start portion is formed. By peeling the lid from the inner lid, the area surrounded by the opening forming notch of the inner lid is broken and removed in a state of being adhered to the outer lid, so that the opening can be easily formed in the inner lid. . In the lid material, a release layer is formed on the outer surface of the inner lid corresponding to a region where the inner surface of the outer lid and the outer surface of the inner lid are peelably adhered, or the cutout is formed around an opening forming cut. When the outer lid and the inner lid are laminated by a polyethylene layer or the like, the adhesive layer is formed on the outer surface of the inner lid corresponding to the region where The outer lid can be peeled off from the inner lid because the adhesive strength between the enclosed areas and the adhesive strength between the polyethylene layer and the areas other than those surrounded by the opening forming cuts in the inner lid can be changed arbitrarily. Thereby, an opening can be easily formed in the inner lid. In the lid material, the opening-forming cuts are formed of intermittent cuts, and have a shape that reaches the adjacent cuts when the rear end of the opening direction of each cut except the rear end is extended in the opening direction, When the outer lid is peeled off from the inner lid, the opening forming cut is broken with a small force to form a clean opening. In the above-mentioned lid material, the outer lid is composed of an outer lid print layer, a paper layer, an adhesive layer, and an aluminum foil layer, and the inner lid is composed of a biaxially stretched plastic layer, an inner lid print layer, and a thermoadhesive resin layer. Thereby, the curl is small in a state where the cap is punched into a predetermined shape, the cap is excellent in filling suitability when the cap is supplied onto the container, and the cap having excellent barrier properties can be obtained. In the above-described lid material, by adopting a configuration in which the outer lid print layer and the inner lid print layer are provided in synchronization with each other, a point pattern can be printed at a predetermined position. it can. A step of forming an inner lid printing layer by printing on one surface of a roll-shaped biaxially stretched plastic layer, a step of laminating a thermoadhesive resin layer on the inner lid printing layer surface of the biaxially stretched plastic layer, A step of forming an opening forming cut and a peeling start forming cut to form an inner lid laminate, and a step of separately laminating a roll-shaped paper layer and an aluminum foil layer to produce an outer lid laminate. Laminating the aluminum foil layer surface of the outer lid laminate and the biaxially stretched plastic layer surface of the inner lid laminate with a hot melt extruded polyethylene layer to form a lid laminate, and a roll-shaped lid laminate. 2
Cutting a sheet at a predetermined position corresponding to the inner lid printing layer of the axially stretched plastic layer, forming an outer lid printing layer by printing on the paper layer surface of the cut lid material laminate, By manufacturing with a method including a step of punching into a material shape, the pattern of the outer lid printing layer and the inner lid printing layer can be synchronized, so that a lid material having a point design and excellent design properties can be manufactured. Becomes possible. In the method for manufacturing a lid material described above, in the step of forming the inner lid printing layer on one surface of the roll-shaped biaxially stretched plastic layer by printing, simultaneously forming the inner lid printing layer on the other surface of the biaxially stretched plastic layer. By forming the release layer or the adhesive layer in the corresponding predetermined area by printing, the release layer or the adhesive layer can be formed at a predetermined position on the outer surface of the inner lid.

[Brief description of the drawings]

FIG. 1 is a plan view of a back surface showing an embodiment of a lid member of the present invention.

FIG. 2 is a cross-sectional view illustrating a lamination structure according to the first embodiment;
-I sectional drawing.

FIG. 3 is a cross-sectional view showing a state in which the lid member of the first embodiment is adhered to a container.

4A and 4B show a state in which the outer lid of the lid material of the first embodiment is peeled off, wherein FIG. 4A is a cross-sectional view of the peeled outer lid and FIG. 4B is a sectional view showing the inner lid adhered to a container. Sectional view.

FIG. 5 is a cross-sectional view illustrating a state in which the lid member according to the second embodiment is adhered to a container.

FIG. 6 shows a state in which the outer lid of the lid material of the second embodiment is peeled off, wherein (a) is a cross-sectional view of the peeled outer lid, and (b) shows the inner lid adhered to a container. Sectional view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Opening forming cut 15 Polyethylene layer 2 Peeling start forming cut 16 Release layer 3 Release tab 17 Biaxially stretched plastic layer 4 Container 18 Inner lid printing layer 5 Thermal bonding section 19 Thermoplastic resin layer 6 Opening 20 Thermal bonding Resin layer 11 Outer lid printing layer 21 Adhesive layer 12 Paper layer A Outer lid 13 Adhesive layer B, B 'Inner lid 14 Aluminum foil layer

Claims (8)

[Claims] An outer lid and an inner lid having a cut for forming an opening and a cut for forming a peeling start portion formed at predetermined positions;
A lid material having a configuration in which an inner surface of the outer lid and an outer surface of the inner lid are releasably bonded except for a region surrounded by the opening forming cut. 2. A structure in which a release layer is formed on an outer surface of the inner lid corresponding to a region where the outer lid and the inner lid are releasably adhered. Lid material. 3. The lid material according to claim 1, wherein an adhesive layer is formed on an outer surface of the inner lid corresponding to a region surrounded by the cutout for forming the opening. 4. The opening forming notch is formed in a shape that is formed of intermittent cuts and reaches an adjacent cut when the rear end of each of the cuts in the opening direction excluding the rearmost end is extended in the opening direction. The lid material according to claim 1, wherein: 5. The outer lid comprises an outer lid printing layer, a paper layer, an adhesive layer, and an aluminum foil layer, and the inner lid comprises a stretched plastic layer, an inner lid printing layer, and a thermo-adhesive resin layer. The lid material according to claim 1, wherein 6. The lid material according to claim 5, wherein the outer lid print layer and the inner lid print layer are provided in synchronization with each other. 7. A step of forming an inner lid printing layer on one surface of a roll-shaped biaxially stretched plastic layer by printing, and a step of laminating a thermoadhesive resin layer on the inner lid printing layer surface of the biaxially stretched plastic layer. Forming an opening forming cut and a peeling start forming cut in a predetermined area to form an inner lid laminate; and laminating a roll-shaped paper layer and an aluminum foil layer to form an outer lid laminate. Forming a lid material laminate by laminating the aluminum foil layer surface of the outer lid laminate and the biaxially stretched plastic layer surface of the inner lid laminate with a hot-melt extruded polyethylene layer; A step of cutting the lid material laminate into a sheet at a predetermined position corresponding to the inner lid print layer of the biaxially stretched plastic layer, and forming an outer lid print layer on the paper layer surface of the cut lid material laminate by printing; Process and punching into the specified lid material shape And a process for producing a lid material. 8. In a step of forming an inner lid printing layer on one surface of a roll-shaped biaxially stretched plastic layer by printing, a predetermined area corresponding to the inner lid printing layer on the other surface of the biaxially stretched plastic layer. 8. The method according to claim 7, wherein a release layer or an adhesive layer is formed by printing.