JPH068135B2 - Can-like container lid - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lid constituting a can-like container such as a beverage can and a soup can, and more specifically, a can-like container lid mainly made of synthetic resin by injection molding. Relates to a technique aimed at protecting the score part from damage and facilitating opening.

[Conventional technology]

Regarding the can-like container lids as described above, a can-like container mainly made of a synthetic resin has been proposed (Japanese Patent Laid-Open No. 52-52).
39489).

However, there are various requirements to be fulfilled when the synthetic resin can-like container is put on the market, for example, because soft drinks and the like are filled and stored in the container through retort sterilization and put on the product distribution process. In addition, it is required that the retort characteristics are good and that the molded product does not peel due to the heat history during the retort treatment. In addition, the product has high drop strength, excellent food hygiene, and good moldability,
It has to be incinerated, has a good gas barrier property, and can withstand storage for a relatively long period of time, and it must be openable to remove the contents. I won't.

The present inventors have been earnestly studying the lid of such a synthetic resin can-like container.

An example of the initially proposed lid body will be described with reference to FIGS. 17 and 18. The lid body 34 includes the multilayer substrate 5
As shown in FIG. 18, the intermediate layer of the multi-layer substrate 5 has a gas barrier substrate, particularly an aluminum foil (hereinafter referred to as Al foil). It may be referred to as a foil) 36 and has heat-sealable synthetic resin layers 37 and 28 on both sides thereof. This multilayer base material 5 is set in advance in the injection molding machine full mold, and the synthetic resin is Manufactured by injection.

As a method of setting the multilayer base material 5, various devises are required. For example, when the multilayer base material 5 moves during the molding process and a positional deviation occurs, a high insert precision cannot be obtained. The method of inserting and fixing the multilayer base material 5 into the stripper plate in the injection molding machine is effective. In addition, the Al foil 36 of the multilayer base material 5
Since a thin one is used as the material, a pinhole may be formed when stretched, or the product thickness may become uneven. Therefore,
The multilayer base material 5 is set between a male mold and a female mold each having a groove or no groove, and the multilayer base material 5 is slid into the female mold and preformed in advance. Every time, set this in the injection mold and perform injection molding,
The method of the earnest examination of the present inventors is effective.

In the case-like container lid made of the synthetic resin obtained in this way by injection molding, the heated and melted injection resin is laminated on the synthetic resin layer 37 on one surface of the multilayer base material 5. Therefore, the adhesion between the layer 35 made of the injection resin and the synthetic resin layer 37 is good, and the multilayer base material and the synthetic resin sheet previously made by injection molding or the like are bonded by using an adhesive. Compared with the obtained one, peeling due to heat history during retort treatment etc. is reduced, product drop strength is also large, and since no adhesive is used, it is excellent in food hygiene and the process is also It is shortened and has good moldability. Furthermore, since pinholes and cracks do not occur even if a thin Al foil is used, it is possible to use a thin Al foil, and when using a multi-layer substrate, the Al foil, which occupies a large weight in the price, can be used as a necessary gas barrier. The thickness can be suppressed to the minimum thickness at the property level, and the manufacturing cost can be reduced. Further, as a result of using a thin Al foil, complete combustion is possible, the problem of empty can processing can be solved, and on the other hand, the other surface of the multilayer base material 5 that can be heat-melted (bonded) to the synthetic resin layer 38. Thus, the can-like container can be easily heat-bonded to the body of the can-like container, and in combination with the use of the Al foil or the like, a can-like container having excellent gas barrier properties and capable of being stored for a long period of time can be constructed.

However, in the method of integrally molding at the same time as the injection as described above, since the adhesion between the synthetic resin layer 37 and the injection resin layer 35 is high, it is necessary to devise in terms of easy opening. In the embodiment shown in (1), a treatment layer 39 for the purpose of easy peeling by a printing ink layer or the like is provided between the resin layers 37 and 35. In addition, a score portion (notch portion) 41 that is an exposed portion of the multilayer base material 5 is provided on the panel portion 40 of the lid 34, and the score portion 41 separates the inner side and the outer side thereof. That is, to explain the opening of the lid, the handle portion 42 for opening the lid provided inside the score portion 41 is inserted into the groove 43 with a fingertip and lifted as shown by the arrow mark. Part of the portion 42 is peeled off from the multilayer base material 5. At that time, since the treatment layer 39 for the purpose of easy peeling is interposed between the multilayer base material 5 and the handle portion 42 as described above, peeling is easy, and if the handle portion 42 is lifted as it is. , At the position of reference numeral 44, the tip end portion of the grip portion 42 is pushed into the inside of the multilayer base material 5, and the multilayer base material 5 is cut and pulled by the grip portion 42 as it is, along the score portion 41, that is, According to the example illustrated in FIG. 17, the multilayer base material 5 is cut from the two side portions formed into an acute angle into the 3/4 circular portion which is connected to the two side portions, and viewed from the center of the lid of the score portion 41. It is designed to be opened to the inside of the peripheral edge on the outside, and with the score portion 41 as a boundary, the inside and the outside thereof are not connected and are separated, which contributes to the improvement of the opening property. There is.

However, with the lid, it is difficult to position it on the surface of the multi-layer substrate 5 according to the shape of the grip portion 42, and to apply a release agent such as printing ink as the processing layer 39 that is easily and easily peelable with high accuracy. Yes, as a result of the subsequent examination, the handle part was changed to a method in which it can be attached to the lid body by retrofitting,
I tried to overcome this difficulty.

[Problems to be Solved by the Invention]

However, even when the handle part is attached to the lid body by such retrofitting, in the container having such a structure, the score part to be cut at the time of opening the lid is opened to the outside, so that the score part may be different from the others. It is easily damaged in the event of a collision. This is because if the score part is an open ring, the panel part on the inner side of the score part is integrated with the peripheral flap part, so that the external force does not directly act on the score part even if the outside acts on the panel part. . However, in the case of a closed ring score part, even if a force is applied to the center part as well as the score part, it may immediately lead to damage to the score part.Therefore, in the case of a closed ring score part, measures against external force should be taken. is necessary.

The present invention solves such a problem, and a lid body capable of protecting the score portion of the lid of the can-like container having the above-described structure having a closed annular score portion from external force as much as possible and facilitating opening. The purpose is to provide.

[Means for Solving the Problems]

The present invention is a lid body that is heat-bonded to the body of a can-like container and that is composed of a flap portion at the periphery attached to the body portion and a panel portion on the inner side of the flap portion, at least on the body portion side. A thermoplastic resin or a thermoplastic resin formed by injection molding, except at least the closed annular score portion for opening the can, on the surface of the gas barrier substrate on which the resin layer capable of heat fusion bonding is laminated A layer made of a resin composition (referred to as an injection resin layer) is laminated, and the injection resin layer is located near the flap portion in the opening surrounded by the inner peripheral edge of the closed annular score portion in the panel portion. A resin handle for opening the can is attached to the handle attaching portion, and the tip of the handle is positioned within the outer peripheral edge of the score portion,
The present invention is a lid for a can-like container, which has an outer shape that covers the score portion as wide as possible except the tip portion.

[Action]

A typical operation of the present invention will be described. In the relationship between the handle portion that is retrofitted as described above and the opening portion surrounded by the outer peripheral edge of the closed annular score portion, a part (tip portion) of the handle portion is described. By positioning the inside of the outer peripheral edge of the score part and, on the other hand, by making the score part as wide as possible except the tip part of the handle part, the opening property by the tip of the handle part is maintained. The remaining portion of the handle portion can prevent external damage to the score portion as much as possible. on the other hand,
Compared to the case where the entire handle is located inside the opening,
Since the remaining part protrudes to the outside of the opening, the size of the handle part becomes large, the tip part of the handle part becomes difficult to insert into the multilayer base material, and a large force can be applied when cutting the multilayer base material. When the end of the handle part is lifted when opening the can, the intersection of the handle part and the closed annular score part serves as a fulcrum for the "lever", and the tip part of the handle part located in the opening part It is easy to cut the multilayer base material, and the edge of the tip slides in the opening as the handle is lifted.
The opening becomes easy, and the can can be opened instantaneously with relatively weak force.

〔Example〕

 Next, the present invention will be described based on the embodiments shown in the drawings.

FIG. 3 is a plan view of the lid main body before attaching the handle portion, which is an embodiment of the present invention, and FIG. 4 is a sectional view taken along the line BB of FIG.

The lid 1'is illustrated as a round can lid.

On the left side of the lid panel portion 9 inside the flap portion 7 of the lid body 1 ′ in the figure, a band-shaped score portion 10 having an elliptical closed ring shape is provided.

The overall shape is different from that of the score portion 10 shown in FIG. 17 described above. By making the outer peripheral edge 10 ′ of the score portion 10 into a curved shape such as a closed circular shape, drop can strength and easy Openness can be improved.

Further, as shown in FIG. 3, by providing the end of the score portion 10 as close to the flap portion 7 side as possible,
Similarly, the can drop strength and the easy-open property can be improved.

A pedestal portion 11 which is a handle portion mounting portion made of an injection resin layer similar to the score outer side panel portion 6 is provided at a position near the flap portion inside the opening surrounded by the inner peripheral edge of the closed annular score portion 10. . The boss 12 may be provided upright on the pedestal portion 11, and the boss may be similarly made of injection resin. A hinge portion 45 may be provided on the extension portion 14 extending from the pedestal portion 11 as shown in FIG. By the hinge portion (groove portion) 45, the handle portion can be easily lifted as described later, and the opening property can be further improved.

The pedestal portion 11 and the inner portion (takeover portion) 16 surrounded by the extension portion 14 are exposed portions of the multilayer base material 5. However, the take-up portion 16 may be filled with the same injection resin layer as that of the score outer side panel portion 6.

As shown in FIG. 5, the lid body 1 in which the boss 12 is provided upright
Then, the handle portion 13 is attached by retrofitting as described above.

Since the handle portion 13 is attached later, it does not necessarily have to be the same as the injection resin used for the boss 12, but since it is ultrasonically melted, it is made of the same resin as the resin forming the boss 12.

To attach the handle portion 13 to the lid main body 1, a hole through which the boss 12 passes is provided in the front end portion side of the handle portion 13, and the hole and the boss 12 are aligned with each other. It can be performed by melting the boss 12 portion protruding from the hole by ultrasonic vibration.

However, in this case, the molten resin rises on the upper surface of the handle portion 13 and deteriorates the appearance. Therefore, the size of the hole of the handle portion 13 is devised, and the protruding portion from the handle portion 13 of the boss 12 is ultrasonically vibrated. If the molten resin component fills the hole of the handle portion 13 when melted by, the appearance of the lid can be improved and the handle portion 13 can be more firmly fixed. Can be attached to 1.

In addition, the attachment method proposed by the present applicant can be applied to the attachment of the handle portion to the lid body by the boss method (see Japanese Patent Application No. 61-4237).

7 and 8 are a plan view (FIG. 7) and a cross-sectional view of the lid (FIG. 8 is a cross-sectional view taken along line D-D in FIG. 7) of a lid to which a grip portion 13 of another form is attached. ). The handle portion 13 is provided with a circular hole 130.
By inserting a straw into the multi-layer substrate 16 exposed through the hole 130, the contents of the can can be ingested by the straw.

An embodiment of the invention is already shown in FIGS. 5 and 7.

A closed annular score portion 10 before attachment of the handle portion shown in FIG. 3,
Although not looking at the relationship with the handle portion 13 shown in FIGS. 5 and 7, a part (tip portion) of the handle portion 13 is located inside the outer peripheral edge 10 ′ of the score portion 10. Handle part 1
It can be seen that 3 is gradually positioned outside the score part 10 and can cover the score part as widely as possible.

FIG. 1 illustrates the relationship between the score portion 10 and the handle portion 13 in more detail.

As shown in the figure, the tip portion 1 of the handle portion 13 indicated by hatching is shown.
3A is located inside the outer peripheral edge 10 'of the score portion 10, and is a portion of the handle portion 13 other than the distal end portion with the intersection X between the handle portion 13 and the outer peripheral edge 10' as a boundary. The outer edge of a certain 13B (also indicated by diagonal lines) is the score part 10
Located on the outer side of the outer peripheral edge 10 ', 13B covers the score portion.

The opening of the lid can be described with reference to FIG.

When the end portion of the other portion 13B of the handle portion 13 is lifted in the direction of the arrow in FIG. 2, the tip end portion 13A of the handle portion 13 cuts the multilayer base material 5 of the score portion 10. When the end portion of the other portion 13B of the handle portion 13 is further lifted, the intersection point X acts as a fulcrum between the handle portion 13 and the lid body 1 based on the "lever principle", and the tip portion 13A is the multilayer substrate 5 Since the tip portion 13A is inside the outer peripheral edge 10 ′ of the score portion 10, the outer peripheral edge 10 ′ of the score portion 10 is pierced as shown by the horizontal arrow.
It slides along the outer peripheral edge 10 'while contacting with.

At the time of opening the can, the size of the handle portion 10 is large as a whole, and the tip portion 13A is further inside the outer peripheral butterfly edge 10 'of the score portion 10 by the "leverage principle" by the intersection X. Since it is designed to slide inside,
When the tip portion 13A cuts the multilayer base material 5, the lid can be opened at a stroke due to the momentum associated with the cutting. That is, in the case of a normal lid with a handle portion, first, the handle portion is lifted up and the tip portion is bitten in to cut the multilayer base material, and then the opening portion is formed by only pulling up the handle portion or only pulling up from the beginning. In the lid of the present invention, the opening can be formed by simply lifting the handle and pushing it. In particular, opening the can is easy even when the can is heated to a high temperature.

In such a case, by providing the hinge portion 45, the extending portion 14 is bent at the hinge portion 45, and the multilayer base material 5 at the most distal end of the tip portion 13A of the handle portion 13 is bent.
Piercing into and subsequent breaking becomes even better.

Further, the opening start end, which is the most distal end portion of the tip end portion 13A of the handle portion 13, is not made to have a sharp tip as shown in FIG. 17, but as shown in FIG. 1, FIG. 5, and FIG. ,
The rounded tip makes it easier to open the handle. At first glance, as shown in Figure 17,
It is easy to think that a sharp tip is better for opening the can, but the opposite is true, and it is preferable to configure the opening start end of the handle 13 so as to have a rounded tip. It became clear by the examination of the people.

The reason for this is not clear, but in the case of a sharp tip, the synthetic resin in the multilayer base material 5 stretches and deforms the score portion, which hinders smooth cutting of the multilayer base material, while It is conceivable that if the tip portion is tinged with this, it is possible to break the score portion 10 without deforming it.

Further, as shown in FIG. 6, the back surface of the lifting-side end of the handle portion 13 may be attached to the protrusion 46 protruding from the extending portion 14.

By applying ultrasonic vibration from the upper surface of the handle portion 13,
The lifting-side end of the handle 13 can be attached to the protrusion 46 without floating from the lid body.

In this way, while one end of the handle portion 13 is ultrasonically welded by erecting the boss 12 or the like, while the other end of the handle portion 13 is attached as described above, the force applied to the cutting increases, and If the opening of the can is further improved, and if the other end of the handle 13 is lifted from the lid body, it is possible to prevent the purchaser from tampering with the handle (a check function for checking whether the handle is in the initial state). In addition, it is possible to eliminate troubles caused by contact between the handle part and another object during transportation.

FIG. 9 is a plan view of the lid body 1 after the lid is opened, and as shown in the figure, the inside of the outer peripheral edge 10 ′ of the score portion 10 is opened. In the figure, reference numeral 15 is an opening formed by the opening of the can.

FIG. 10 is a sectional view taken along the line EE in FIG.

FIG. 11 shows an example in which the lid 1 shown in FIG. 7 is attached to the body portion 8, and the bottom lid 1 ″ is attached to the bottom of the body portion 8 to form a can-like container.

Similarly to the top cover 1, the bottom cover 1 ″ is also manufactured by the integral simultaneous molding in which the multilayer base material proposed by the present inventors is set in the mold of the injection molding machine and the resin is injected into the mold. be able to.

Next, an example of a method for manufacturing the can-like container lid of the present invention will be described.

As shown in FIG. 12, the multi-layer substrate 5 is inserted into the guide member (stripper plate) 17. This may be performed while adsorbing the multilayer base material 5 on the moving cylinder 18 of the robot. Stripper plate 17 as shown in FIG.
While preventing the positional displacement by fixing the multi-layer substrate 5 inside the first
Clamp the mold as shown in Fig. 4. By this mold clamping, the flat-plate-shaped (two-dimensional shape) multilayer base material 5 is bent at its end in the mold (core mold, receiving mold) 19 as shown in FIG. Molten resin is injected from the gate 21 of a mold (cavity type, injection type) 22 having a gate 21 into a cavity (in-mold space) 23 formed by the core mold 19 and the cavity mold 22, and as shown in FIG. As shown in FIG. 6, a score outer panel portion 6 which is a plastic layer made of the above-mentioned molten resin is laminated on the surface of the multi-layer substrate 5, and during this injection molding, the pedestal portion (handle portion attaching portion) 1
1, the extension part (removal part) 14 and the boss 12 can be molded simultaneously, and the score part 10 and the take-up part 16 are also formed.

Conventionally, as described above, a lid (particularly, an upper lid) that constitutes such a can-like container generally has an A] foil having a heat-fusible resin on both sides, and a resin sheet pre-formed by injection molding with an adhesive. Although it was obtained by post-bonding, this method increases the work constant and raises the cost that the molded product peels off due to the heat history of retort treatment, and the drop strength of the manufactured product is There were various problems such as inferiority and the problem of food hygiene due to the use of an adhesive.

That is, when the can-like container (lid) is put on the market, the retort property is good when the retort treatment is performed after the container is filled with the contents such as beverages, while considering the cost. There are many things to be equipped as a lid that constitutes a can-like container, such as having the strength that can withstand the product if it falls, and that there is no food hygiene problem if the contents of the can are food. In addition, ingestion of a container in a can,
It is required that opening of the can is easy for taking out.

The present inventors have previously studied to obtain a lid by injection simultaneous molding (integral molding) instead of the above-mentioned molding method by post-adhesion. However, since the multilayer base material 5 moves during the molding process, misalignment occurs. However, there was a problem in the insert accuracy between the multilayer base material 5 and the injection resin layer 6. That is, the conventional general injection molding method, such as simply setting the flat plate-shaped multilayer base material 5 along the shape of the core die of the molding die, can obtain only a low insert precision, and therefore, it is desirable. It was difficult to obtain a can-like container lid. But,
As described above, the guide member 1 such as the stripper plate
The method of inserting and fixing the multi-layer substrate 5 in 7 has succeeded in eliminating the difficulty in the above-mentioned inserter molding, and as a result, the can-like container lid having the above-mentioned valve requirements such as good retort characteristics. I was able to get

The can-like container lid 1 of the present invention can be obtained by the above method, but it has been found that the following method is more preferable. This will be described with reference to FIGS. 15 and 16.

A disc-shaped multi-layer substrate 5 as shown in FIG. 15 is set between a male mold 26 and a female mold 27 in which longitudinal grooves 24 and 25 are engraved, respectively, and set in a hollow portion of the female mold 27. Male mold 2
6 is pushed in, and the remaining part of the multilayer base material is wrinkled in the longitudinal direction 2
8 as a container-like preformed multilayer substrate 32 having a flange portion 29, a body wall portion 30, and a bottom portion 31 without substantially stretching the multilayer substrate 5.
And

The preformed multilayer substrate 32 is set in an injection molding die 33, and molten resin is injected.

At the time of injection, the multilayer base material 32 is pressed against the mold 33 by the resin pressure of injection molding, and the wrinkle 28 is smoothed.

This prevents irregular large wrinkles of the multi-layer substrate that occurs in the case of the flat insert molding method shown in FIGS. 12 to 14, and the flap portion 7 of the can-like container lid 1 is replaced with the body part 8 of the can-like container. In the case of welding by high-frequency induction heating, it is possible to prevent the occurrence of defective seaming, and also, the gas barrier substrate (A
(1 foil) 2 can be prevented from being cut, and since it is preformed without being substantially stretched, a thin Al foil can be used, and the Al foil in the obtained molded product also has a uniform thickness. Can be played.

In this case, in both the male mold 26 and the female mold 27, the groove (2
4) and (25) may be omitted, and a smooth surface may similarly be preformed.

Even with this method, it is possible to obtain effects such as preventing the occurrence of large irregular wrinkles in flat insert molding.

Examples of the gas barrier substrate 2 used in the present invention include the following sheets and films in addition to metal foil.

An aluminum foil is mentioned as a typical example of the metal foil, and the present invention particularly relates to a can-like container lid in which the aluminum foil is used as the gas barrier substrate 2. Other examples of the gas barrier substrate 2 include saponified products of ethylene-vinyl acetate copolymer, sheets and films of polyvinylidene chloride, polyamide, polyacrylonitrile and the like.

As described above, the can-like container lid 1 according to the present invention is designed to cut and open the multi-layer substrate 5 having the gas barrier substrate 2, which is easy to open and is used as a product. The thickness of the gas barrier substrate 2 such as the aluminum foil is 50 μm or less, preferably 9 to 30 μ, from the viewpoints of the drop strength, the breaking strength, and the breaking strength during molding.

Also, with such a thickness, complete incineration is possible, and the incinerated calories are 5000 to 6000k.
It can be reduced to cal / kg to address the problem of empty can processing.

The multi-layer substrate 5 preferably has heat-meltable resin layers (hereinafter referred to as first resin layers) 3 and 4 on both sides of the gas barrier substrate 2.

The can-like container lid according to the present invention is attached to the body portion 8 of the can-like container as described above, and the body portion 8 having the same resin layer surface is used.

The eleventh resin layer of the lid, which is the attachment side to the body portion 8, is the inner layer 4, and the resin layer (hereinafter referred to as the second resin layer) laminated on the multilayer base material 5 by injection molding or the like and the heat fusion Assuming that the first resin layer on the side to be attached is the outer layer 3, as the multilayer substrate 5 according to the present invention, it is preferable that the inner and outer layers 3 and 4 are formed as described in the above embodiment. The presence of the outer layer 3 facilitates heat fusion with the second resin layer, and can form a lid in which the second resin layer does not easily peel off. However, the outer layer 3 can be omitted.

As the resin forming the first resin layers 3 and 4, a resin that is melted by heat, typically a thermoplastic resin, is used.

The inner and outer layers 3 and 4 may be made of the same resin or different resins.

When the first resin layers 3 and 4 are laminated on the gas barrier substrate 2, they can be molded with or without an adhesive resin layer such as an adhesive or a film-like hot melt adhesive.

The thickness of the first resin layers 3 and 4 is preferably 100 μm or less on one side for the same reason as that of the gas barrier substrate 2 described above.

〔The invention's effect〕

The following is a brief description of an effect obtained by the representative one of the inventions disclosed in the present application.

(1) Since it is a thin layer, it is possible to protect the score portion that is easily damaged when another object collides.

(2) The opening property is good, and the handle portion can be opened, and the opening can be performed by the force of just pushing.

In the past, a pulling force was required, but in the present invention, the pushing force allows the opening to be easily performed.

For this reason, it is possible to open with a smaller force than before, and with the conventional lid using plastic, it was difficult to open when the contents were hot, but it is possible to open easily even in such a case.

(3) Retort treatment, which is a high-temperature treatment, is possible and excellent in food hygiene.

(4) It has gas barrier properties, and since it can be used as a barrier material in the form of alum, it can be incinerated as well.
It is low pollution and economical.

[Brief description of drawings]

FIG. 1 is an explanatory view of main parts for explaining an embodiment of the present invention, FIG. 2 is an explanatory view of main parts for explaining the embodiment of the present invention, and FIG. 3 is a handle part of a container lid showing the embodiment of the present invention. FIG. 5 is a plan view before mounting, FIG. 4 is an enlarged cross-sectional view taken along the line BB of FIG. 3, FIG. 5 is a plan view in which the handle portion is mounted on the lid shown in FIG. 3, and FIG.
7 is a plan view of a container lid showing another embodiment of the present invention, FIG. 8 is an enlarged cross section of line D-D of FIG. 7, and FIG.
The figure is a plan view after opening the lid, FIG. 10 is a sectional view taken along the line EE of the same, FIG. 11 is an oblique view of an example of a can-like container, and FIGS. 12 to 16 are explanatory views of the lid forming step, respectively. FIG. 18 is a plan view showing a conventional example, and FIG. 18 is a sectional view taken along the line AA in FIG. In the figure, 1 ... Lid, 2 ... Gas barrier base material, 3 ... Thermo-fusible resin layer 4 ... Thermo-fusible resin layer 5 ... Multi-layer base material 6 ... ‥‥ Score outside panel 7 ‥‥ Flap 8 ‥‥ Body 9 ‥‥ Panel 10 ‥‥‥ Score 、 10 '‥ Peripheral edge 13 ‥‥ Handle 15 ‥‥‥‥ Opening 45 ... Hinge 46 ... Projection

Claims (1)

[Claims] 1. A lid body which is thermally joined to a body portion of a can-like container and which is composed of a peripheral flap portion attached to the body portion and a panel portion inside the flap portion, at least the body portion side. A thermoplastic resin or a thermoplastic resin is formed by injection molding on a surface of the gas barrier base material, which is laminated with a resin capable of being melt-bonded, on the surface other than the body portion side, except at least the closed annular score portion for opening the can. A layer made of a composition (hereinafter referred to as an injection resin layer) is laminated, and the injection resin layer is located closer to a flap portion in an opening surrounded by an inner peripheral edge of the closed annular score portion in the panel portion. A resin handle for opening the can is attached to the handle attaching portion, and the tip of the handle is positioned within the outer peripheral edge of the score, and the score other than the tip is possible. It is special to have an external shape that widely covers Can-like container lid to be.