JP2011073776A - Container lid with in-mold label - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a container lid with an in-mold label which is prepared by decorating the back surface of a sheet material and is welded by heat on the container lid by an in-mold molding and can be peeled easily. <P>SOLUTION: The container lid A with the in-mold label is prepared by the in-mold molding, sticking the sheet material 2 on a top plate 1a, on the sheet material 2 being in contact with a gate position 3 of the container lid 1, a cutting line 2c is formed surrounding the gate position 3 and a tab 2a projecting outward is formed at a part of the circumference of the sheet material 2 and the sheet material 2, in which the tab 2a is folded as covering from the outside to the inside, is welded by heat on the container lid 1. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a container lid in which an in-mold label welded to the container lid can be easily peeled off.

  Conventionally, as a method of decorating a plastic container, a container lid, etc., the container main body and the lid body are decorated by offset printing or the like, or an adhesive sealing label is attached. Moreover, patent document 1 is the process of thermoforming the lamination sheet which laminated | stacked the peelable film which can be thermoformed, and the partial decorating sheet as a manufacturing method which can give a desired partial decorating to a desired position. Manufacturing of an insert molded body having a partial decoration comprising a step of mounting a thermoformed laminated sheet in an insert molding die and insert molding, and a step of peeling off a thermoformable release film after insert molding A method is described.

  Furthermore, as a method of decorating the top plate portion of the container lid, a label having a decoration such as printing on the sheet material is thermally welded to the top plate portion of the container lid by an in-mode molding method. The method of decorating is common. As a usage, it is used for a lid that covers a container having a relatively wide mouth, such as a lid of a container covered with a can container of powdered milk or a container of yogurt or ice cream. When such a lid is molded by an injection molding method, the gate position for injecting the resin is provided at the center position of the top plate so that the resin can be injected and molded evenly. In this case, since the label remains attached to the top plate portion of the lid by heat welding, no decoration is performed on the back surface of the label.

However, it is easy to peel off the sheet material by creating a peelable sheet material that can be peeled off from the lid by using a release material such as silicon on the back side of the sheet material and performing processing such as printing and coating. The label that is integrally heat-welded near the gate position provided at the center position of the top plate of the lid body is not affected by the injection pressure of the synthetic resin melted at a high temperature. Since the release material such as silicon applied to the sheet material attached to the back surface melts and moves around, the label is welded to the lid of the container, so the sheet material attached to the back surface near the gate position Will be peeled off in the absence of silicon as a release material, so it cannot be peeled off well, and a part of the sheet material on the back side of the label adheres to the top plate of the lid like a thin skin. Left behind Since a state where the label itself would break, it was not possible to confirm the decorative material of the rear surface of the label beautiful state.

Therefore, in order to add the added value of the label by in-mold molding, the sheet material constituting the label can be easily peeled off, and the base material portion fixed to the surface of the resin molded body and the base material portion An in-mold with a label formed by in-mold molding of a label having a peeling base material portion laminated in a peelable manner so that at least a part of the edge of the peeling base material portion is located inside the edge of the base material portion A molded article is described in Patent Document 2.

JP 2007-223203 A JP 2008-133006 A

  Patent Document 1 thermoforms a laminated sheet of a peelable film and a partially decorated sheet obtained by pasting a peelable film that can be thermoformed on a surface that is a decorative side of the partially decorated sheet, and after the thermoforming It is a manufacturing method that facilitates the alignment in the case of partial decoration by performing the insert molding and removing the peelable film from the obtained injection molded body, It is necessary to prepare a laminated sheet obtained by laminating two sheets of peelable film. Since the number of sheets is two, the cost is increased, and it is necessary to have a mold structure considering the thickness of two sheets. . Moreover, after putting a laminated sheet into a predetermined position and performing insert molding, an act of peeling off the peelable film must be taken, which is troublesome. Furthermore, since the laminated sheet that has been heat-welded is integrated with the surface of the molded product and is welded flush, the molded product and the laminated sheet are flush with each other even if it is a peelable film. There is a problem that even if it is scratched with a nail to make it, the nail does not get scratched and cannot be easily removed.

  Moreover, although patent document 2 is an in-mold molded product which can peel easily the sheet | seat which comprises a label, a label can peel to the base material part fixed to the surface of the resin molding, and a base material part. Since it is composed of a sheet material that is a two-ply stack of peeled substrate parts, the cost is increased and the mold structure is also doubled so that it is molded thin. When the label is heat-welded to the top of such a container lid and in-mold molded, the thickness of the molded body that will be the container lid should be thicker than when a single-sheet label is used. If not, there is a problem that sinks and deformation easily occur, so that a design with a thick wall is required, and the amount of resin raw material used is large, resulting in an increase in cost.

  Furthermore, a label structure like patent document 2 is generally called a label with a coupon, and the label itself has a two-layer structure. The surface and the back surface of the first layer sheet material can be decorated such as printing, and the surface of the second layer sheet material can also be decorated. In such a label configuration, the air contained between the first layer and the second layer is obtained by overlapping and pressing the surface of the second layer sheet material and the back surface of the first layer label sheet. Can escape and have an adhesive effect.

In addition, it is common to attach the back side of the second layer to the side surface of the container main body or the top plate of the lid, but Patent Document 2 has such a configuration in which two sheets are stacked. The coupon label is heat-welded by in-mold molding by injection molding or the like, and is attached to the container body or the lid. In this case, since the back surface of the second-layer sheet material is thermally welded to the container body and the lid body, the second-layer sheet material cannot be peeled off from the lid body in this state. . Even if the peelable sheet material that can be peeled off is used as the second layer sheet material and the back surface of the second layer sheet material is decorated and can be peeled off, If the gate position is provided at the center position of the top plate, the label that is integrally heat-welded near the gate position is in the state that part of the sheet material is melted especially near the gate position due to the influence of high temperature injection. Since it is welded to the lid of the container, the vicinity of the gate position cannot be peeled off successfully, and the back of the sheet material partially adheres to the top plate of the lid body like a thin skin. The phenomenon that it breaks itself will occur. For this reason, a molded product in which a sheet material is thermally welded in the vicinity of the gate position cannot be peeled off in a clean state, so printing on the surface of the sheet material in contact with the molded product is not possible. I did not give such decorations.

  The object of the present invention is to solve the above-mentioned problems and to realize what has a function of a label with a coupon with a sheet material of a single sheet, and to reduce the cost of label sheets and the like by solving it And it is providing the lid | cover of the container with an in-mold label with a decoration which implement | achieves easy peeling in a beautiful state, and can confirm the decoration content in a beautiful state.

The present invention provides a label in which a lid of a container made of a synthetic resin material and an annular side wall portion extending from the outer periphery to the lower end of the top plate portion and a synthetic resin material sheet material are attached to the top plate portion and molded in-mold. The sheet material in contact with the gate position of the lid of the container is provided with a slit so as to include the periphery of the gate position, and the sheet material has a peelable film that can be thermoformed. An in-mold label in which the inner sheet material remains on the lid of the container and other sheet materials are peeled off at the boundary of the sheet material cut provided around the gate position by peeling off the sheet material It is a lid of the attached container.

This invention is a lid | cover of the container with an in-mold label which installed two or more connection surfaces which an inner sheet material and an outer sheet material connect on the cut line.

This invention is a lid | cover of the container with an in-mold label which gave decoration on the back surface of the sheet | seat material.

This invention is a lid | cover of the container with an in-mold label which gave the contact bonding layer to a part of sheet material back surface vicinity of the outer periphery of a sheet material.

The present invention provides a lid for a container with an in-mold label in which a knob is formed on a part of the outer periphery of the sheet material, and a sheet material bent so as to cover the knob from the outside to the inside is thermally welded to the lid of the container. It is.

This invention is a lid | cover of the container with an in-mold label which has the part made to peel with respect to a top-plate part in a part of outer periphery of a sheet | seat material.

The present invention provides a label in which a lid of a container made of a synthetic resin material and an annular side wall portion extending from the outer periphery to the lower end of the top plate portion and a synthetic resin material sheet material are attached to the top plate portion and molded in-mold. The sheet material in contact with the gate position of the lid of the container is provided with a slit so as to include the periphery of the gate position, and the sheet material has a peelable film that can be thermoformed. An in-mold label in which the inner sheet material remains on the lid of the container and other sheet materials are peeled off at the boundary of the sheet material cut provided around the gate position by peeling off the sheet material Since the sheet material of the peelable film fixed to the gate position is welded to the container lid in a state where a part of the sheet material is melted due to the influence of high temperature injection, Have Even if it is a film, the sheet material that covers the gate position remains welded and cannot be peeled off successfully. For the sheet material that is attached to the gate position, the perforation is formed along the periphery of the gate position. When the sheet material is peeled off, the sheet material inside the boundary from the cut remains welded and remains on the lid of the container, and the other sheet materials can be turned up. Even if it is not a label such as a coupon label that is stacked two times, by decorating letters, illustrations, photos, etc. on the back of one sheet material, it can be easily peeled off in a beautiful state, To provide a lid for a container with an in-mold label that has a function like a coupon label that allows you to check the decoration contents in a clean state and that can be provided at low cost. It can be.

Since the present invention is a lid of a container with an in-mold label in which two or more connecting surfaces for connecting the inner sheet material and the outer sheet material are installed on the cut line, the inner sheet material is pulled at the cut line. When the sheet material is lifted and peeled off, it remains welded to the top plate portion, and the outer sheet material can be more cleanly peeled off from the top plate portion of the container lid at the cut line, By decorating the back of the sheet material with letters, illustrations, photos, etc., it can be easily peeled off in a beautiful state, can be confirmed in a beautiful state, and can be provided at low cost A lid of a container with an in-mold label having a function like a coupon label can be provided.

Since the present invention is a lid of a container with an in-mold label in which the back surface of the sheet material is decorated, the back surface of one sheet material can be used without using a label such as a coupon label in which two sheet materials are stacked. By applying decorations such as letters, illustrations, and photos, it can be easily peeled off in a beautiful state, and it can be confirmed in a beautiful state and can be provided at a low cost. It is possible to provide a lid of a container with an in-mold label having a special function.

Since the present invention is a lid of a container with an in-mold label in which an adhesive layer is applied to a part of the back surface of the sheet material near the outer periphery of the sheet material, it is not necessary to remove all the labels, and the lid is attached to the container lid. It is possible to provide a lid of a container with an in-mold label, which can be discarded, and the label after peeling is not scattered and becomes garbage.

The present invention provides a lid for a container with an in-mold label in which a knob is formed on a part of the outer periphery of the sheet material, and a sheet material bent so as to cover the knob from the outside to the inside is thermally welded to the lid of the container. Therefore, it is possible to provide a lid of a container with an in-mold label that can more easily peel off the act of starting to peel off the sheet material.

Since the present invention is a lid of a container with an in-mold label having a part peeled off from the top plate part on a part of the outer periphery of the sheet material, the act of starting to peel off the sheet material can be peeled off more easily The lid of the container with an in-mold label made can be provided.

It is a perspective view of the lid | cover of the container with an in-mold label which shows embodiment of this invention. It is the top view which looked at FIG. 1 from the top. It is a perspective view which shows the state which has peeled off the sheet | seat material of FIG. It is a top view which shows the state which folded down a part of sheet | seat material of FIG. 1, and formed the knob | pick part. It is a perspective view of the lid | cover of the container with an in-mold label which shows 2nd Embodiment from which a sheet material differs. It is the top view which looked at FIG. 5 from the top. It is a perspective view which shows the state which picks the knob | pick part of FIG. It is a perspective view which shows the state which picks up the knob | pick part of FIG. 5 and has peeled off the sheet | seat material. It is a perspective view which shows the gate position of the lid | cover of the container with an in-mold label of this invention. It is the top view which looked at the lid | cover of the container with an in-mold label from which the shape of the cut of the sheet material shown in FIG. 6 differs. It is a perspective view which shows the state which picks up the knob | pick part of FIG. 10 and has peeled off the label.

1 to 3 and 9, the lid A of the container with an in-mold label of the present invention is a synthetic resin material such as polypropylene or polyethylene having an annular side wall portion 1 b extending from the outer periphery to the lower end of the top plate portion 1 a. A sheet material 2 of a synthetic resin material, which becomes a peelable film that can be thermoformed on the top plate portion 1a, is heat-welded and attached to the lid 1 of the container. Further, the sheet material 2 in contact with the gate position 3 of the container lid 1 is formed with a circular cut 2c having a peripheral diameter of 15 mm to 20 mm with reference to the center of the gate position 3 shown in FIG.

Further, when two or more connecting surfaces 2d connecting the inner sheet material 2h and the outer sheet material 2i are installed on the line of the cut 2c, when the sheet material 2 is peeled off, FIG. As shown, the inner sheet material 2h from the cut 2c is in a state of being extracted in a circular shape while being welded to the top plate portion 1a of the lid 1 of the container with the cut 2c as a boundary, and the back surface of the outer sheet material 2i is Since it can be peeled off beautifully from the top plate portion 1a, the cover A of the container with an in-mold label with a coupon function that can be provided at low cost by printing characters, patterns, photographs, etc. on the back surface of the sheet material 2 is provided. It becomes possible to provide. The step of forming the cut 2c may be performed by in-mold molding using a sheet material 2 formed in advance, or the sheet material 2 in which the cut 2c is not formed is used. First, in-mold molding is performed, and then a post-processed cutter 2c is formed on the sheet material 2 so as to surround the periphery of the gate position 3 of the lid 1 of the container to which the sheet material 2 is welded. A method of forming the cut 2c by pressing only the thickness may be used.

  In the case of a container lid 1 whose opening such as yogurt or ice cream covers a wide-mouthed container, a gate position 3 is installed at the center position of the container lid 1 as shown in FIG. When the synthetic resin material melted at a high temperature is inserted from the portion, the sheet material 2 covered on the back surface of the gate position 3 is part of the sheet material 2 by the insertion heat of the synthetic resin material melted at the high temperature. It will be fixed to the molded body in a state where the melted. Therefore, it is possible to easily peel off the sheet material 2 by printing or applying silicon or the like on the back surface of the sheet material 2 and using the peelable sheet material 2 that can be peeled off from the lid. Even if the sheet material 2 can be integrally welded to the back surface near the gate position 3 provided at the center position of the top plate portion 1a of the lid, the injection pressure of the synthetic resin melted at high temperature Due to the influence, the release material such as silicon applied to the sheet material 2 applied to the back surface near the gate position 3 is melted and moved in a state where it is pushed outward by about 5 mm and moved to the top 1a of the lid 1 of the container. The sheet material 2 is welded. As a result, the sheet material 2 attached to the back surface in the vicinity of the gate position 3 is welded in a state where there is no silicon or the like as a release material. Since the part of the sticker remains in close contact with the top plate part 1a of the lid body like a thin skin, or the label itself is torn, checking the decoration on the back side of the label in a clean state It becomes impossible.

Furthermore, since the blurring state of the sheet material 2 starts from a different position each time, when decorating the back surface, it is impossible to predict which position should be decorated, and the sheet material 2 is peeled off in the same state every time. The problem that it is not possible to provide a product that can do.

  Accordingly, the present invention forms a circular cut 2c having a peripheral diameter of 15 mm to 20 mm as shown in FIGS. 1 to 4 with reference to the center of the gate position 3 shown in FIG. Further, when the sheet material 2 is peeled off by installing two or more connection surfaces 2d connecting the inner sheet material 2h and the outer sheet material 2i on the line of the cut 2c, as shown in FIG. Further, the inner sheet material 2h from the cut 2c remains welded to the top plate portion 1a of the lid 1 of the container with the cut 2c as a boundary, and remains in a state of being extracted in a circular shape at the sheet material welding position 2f. Since the back surface of 2i is peeled off beautifully from the top plate portion 1a to form a sheet material peeling surface 2e, it can be provided at low cost by printing characters, patterns, photographs, etc. on the back surface of the sheet material 2. It is possible to provide a lid A of a container with an in-mold label with a coupon function.

The label with coupon function is generally composed of labels that can be printed on the surface of the lower layer sheet material by peeling off the sheet material on the upper layer of the two stacked sheets. Although the sheet material 2 to be welded to the present invention is subjected to decoration such as printing on both the front surface and the back surface of one sheet material 2, by peeling off only one sheet material 2, The in-mold label of the present invention is capable of viewing the printed contents decorated on the back surface, and has the same function as a lid of a container with a coupon function using a sheet material laminated in a general two sheets The cover A of the attached container can be realized at low cost by using only one sheet material 2.

In addition, when a label with a coupon function using a general two-ply sheet material is formed by in-mold molding, it must have a mold structure that takes into account the thickness of two labels, Although it is necessary to manufacture a dedicated mold, if you already have a mold for a container lid that has a thickness of 0.35 mm or more, the present invention can be used without specially manufacturing a dedicated mold. By using the sheet material 2 used in the above, it is possible to provide an inexpensive in-mold label-equipped lid A with a coupon function using a holding mold.

Therefore, the sheet material 2 by in-mold molding is also applied to the top plate portion 1a of the lid 1 of the container which is formed into a thin wall with a thickness of 0.35 mm to 0.60 mm, which covers the wide mouth container with an opening such as yogurt or ice cream. Since it is possible to integrally form by heat welding, the lid A of an in-mold label-equipped container with a coupon function that can be provided at a low cost can be easily provided on the lid 1 of the container whose target is thin-walled molding. It is possible. It is preferable to use a sheet material 2 having a thickness of about 0.05 mm. Moreover, when using the thing in which the notch 2c has already been formed in the sheet material 2, the sheet material 2 that is easy to break is used, and the incision 2c is formed by pressing a cutter such as a cutter after in-mold forming. In this case, it is preferable to use the sheet material 2 which is not easily broken.

Furthermore, as for the material of the sheet material 2 used in the molded product of the present invention, by using a stretchable sheet material made of a synthetic resin material, the sheet material 2 to which heat is applied at the time of molding is stretched and the top plate portion It is temporarily bonded to 1a and becomes the lid A of the container with an in-mold label.

In addition, after in-molding, a hard material such as metal is used on a part of the outer periphery of the sheet material 2 at the position where the peeling is started so that the top plate portion 1a can be easily peeled off. By pressing a hard material that has been embossed with unevenness, etc., against the lid 1 of the container where the sheet material 2 at the start of peeling is welded, unevenness is formed on a part of the sheet material 2, The unevenness of the material 2 allows a part of the sheet material 2 to be lifted from the top plate portion 1a and to have a peeled portion. Therefore, the unevenness of the sheet material 2 and the lifting of the sheet material 2 make it easier to peel off. be able to.

Furthermore, when the sheet material 2 is peeled off by applying the sheet material adhesive layer 2g shown in FIG. 3 to a part of the back surface of the sheet material 2 at a position opposite to the position where the peeling of the sheet material 2 is started, Since a part of the sheet material 2 remains adhered to the top plate portion 1a, the user turns and confirms the decoration contents with decorations and letters on the back surface of the sheet material 2 for the use of a label with a coupon function. After that, since the sheet material 2 remains adhered to a part of the top plate portion 1a, it can be discarded together with the lid 1 of the container without becoming garbage.

In FIG. 4, a folded line 2 b is formed by folding a part of the peripheral edge of the sheet material 2 shown in FIG. 2 so as to cover from the outside to the inside, and the vicinity of the bent peripheral edge has a knob portion 2 a. Installed. In addition, the knob portion 2a and the sheet material 2 are double stacked on a part of the knob portion 2a and the sheet material 2 to be covered.

The sheet material 2 is placed on the outer surface mold corresponding to the surface shape of the lid 1 of the container, and the mold is clamped by the injection mold method so that the mold is clamped and synthesized from the core mold. By injecting and molding the resin material, the lid 1 of the container with an in-mold label of the present invention is formed. The sheet material 2 can be decorated by printing letters, patterns, photographs, etc. on the back surface of the sheet material 2 as well as the front surface.

  The knob portion 2a in the state where the lid 1 of the container with an in-mold label of the present invention is formed is one in which a part of the integrally formed sheet material 2 is overlapped and taken out after injection molding. In this state, the knob portion 2a is formed in a state where it sticks to a part of the sheet material 2, but when the tip of the knob portion 2a is hooked with a finger or a nail, the knob portion 2a is simply shown in FIG. Stand up. As shown in FIG. 8, the raised knob 2a that has stood up can be picked up and pulled up. By making the surfaces of the sheet where the knob portion 2a and the sheet material 2 overlap each other easy to peel, it becomes possible to prevent adhesion due to thermal welding.

5 to 9 show a second embodiment in which the sheet material 21 is different. The sheet material 21 shown in FIG. 5 to FIG. 8 is formed by forming a knob 2 a protruding outward from a part of the outer periphery of the sheet material 21. The folding line 2b is formed by folding the knob 2a so that it is covered from the outside to the inside. Further, the knob portion 2a and the sheet material 21 are overlapped in a part of the knob portion 2a and a part of the sheet material 21 to be covered. The shape of the knob 2a is not limited to a semicircle as shown in FIG. 2, but a shape that is easy to pinch, such as a square or a triangle, may be installed. Furthermore, a cut 2c is formed in the sheet material 21 in contact with the gate position 3 of the container lid 1 so as to surround the gate position 3.

The sheet material 21 is placed on the outer surface mold corresponding to the surface shape of the lid 1 of the container, and the mold and mold are clamped by the injection mold method so that the mold is clamped and synthesized from the core mold. By injecting and molding the resin material, the lid 1 of the container with an in-mold label of the present invention is formed. The sheet material 21 can be decorated by printing letters, patterns, photographs, and the like on the back surface of the sheet material 21 as well as the front surface. The step of forming the cut 2c may be performed by in-mold molding using a sheet material 21 formed in advance, and the sheet material 21 in which the cut 2c is not formed is used first. After that, in the post-processing, the thickness of the sheet material 21 is set so that the cutter formed in the cut 2c shape is surrounded by the gate position 3 of the lid A of the container to which the sheet material 21 is welded. A method of forming the cut 2c by pressing may be used.

  The knob portion 2a in the state where the lid A of the container with an in-mold label of the present invention is formed is a stack of a part of the sheet material 21 formed integrally and is taken out after injection molding. In this state, the knob portion 2a is formed in a state where it sticks to a part of the sheet material 21, but by simply hooking the tip of the knob portion 2a with a finger or a nail, the knob portion 2a is simply shown in FIG. Stand up. As shown in FIG. 8, the raised knob 2a that has stood up can be picked up and pulled up. By making the surfaces of the sheets where the knob portion 2a and the sheet material 21 overlap with each other, it is possible to prevent adhesion due to heat welding.

  In the case of a container lid 1 whose opening such as yogurt or ice cream covers a wide-mouthed container, a gate position 3 is installed at the center position of the container lid 1 as shown in FIG. When the synthetic resin material melted at a high temperature is inserted from the portion, the sheet material covered on the back surface of the gate position 3 is part of the sheet material 21 due to the insertion heat of the synthetic resin material melted at the high temperature. In the melted state, it is fixed to the molded body. Therefore, it is possible to easily peel off the sheet material 21 by printing or applying silicon or the like on the back surface of the sheet material 21 and using the peelable sheet material 21 that can be peeled off from the lid. Even if the sheet material 21 can be integrally welded to the back surface near the gate position 3 provided at the center position of the top plate portion 1a of the lid body, the sheet material 21 depends on the injection pressure of the synthetic resin melted at a high temperature. Due to the influence, a release material such as silicon applied to the sheet material 21 applied to the back surface near the gate position 3 is melted and moved in a state where it is pushed outward by about 5 mm and moved to the top 1a of the lid 1 of the container. The sheet material 21 is welded. As a result, the sheet material 21 affixed to the back surface in the vicinity of the gate position 3 is welded in a state where there is no silicon or the like as a release material, so that the sheet material 21 on the back surface of the label cannot be peeled off successfully. Since the part of the sticker remains in close contact with the top plate part 1a of the lid body like a thin skin, or the label itself is torn, checking the decoration on the back side of the label in a clean state It becomes impossible.

Furthermore, since the blurring state of the sheet material 21 is started from a different position each time, when decorating the back surface, it is impossible to predict which position should be decorated, and the sheet material 21 is peeled off in the same state every time. The problem that it is not possible to provide a product that can do.

  Therefore, the present invention forms a circular cut 2c having a peripheral diameter of 15 mm to 20 mm as shown in FIGS. 5 to 8 with reference to the center of the gate position 3 shown in FIG. Further, when the sheet material 21 is peeled off by installing two or more connection surfaces 2d connecting the inner sheet material 2h and the outer sheet material 2i on the line of the cut 2c, as shown in FIG. Further, the inner sheet material 2h from the cut 2c remains welded to the top plate portion 1a of the lid 1 of the container with the cut 2c as a boundary, and remains in a state of being extracted in a circular shape at the sheet material welding position 2f. Since the back surface of 2i is peeled off beautifully from the top plate portion 1a to form a sheet material peeling surface 2e, it can be provided at low cost by printing characters, patterns, photographs, etc. on the back surface of the sheet material 21. It is possible to provide a lid A of a container with an in-mold label with a coupon function.

The sheet material 21 to be welded to the present invention is decorated on the back surface by performing decoration such as printing on both the front surface and the back surface of one sheet material 21 and peeling off only one sheet material 21. The printed contents can be seen, and the same function as that of a container lid with a coupon function using a general two-ply sheet material is used, and the container lid A with an in-mold label of the present invention is used. Then, it can be realized at low cost with only one sheet material 21.

In addition, when a label with a coupon function using a general two-ply sheet material is formed by in-mold molding, it must have a mold structure that takes into account the thickness of two labels, Although it is necessary to manufacture a dedicated mold, if you already have a mold for a container lid that has a thickness of 0.35 mm or more, the present invention can be used without specially manufacturing a dedicated mold. By using the sheet material 21 used for the above, it is possible to provide the lid A of the container with an in-mold label with an inexpensive coupon function by using the holding mold.

For this reason, the sheet material 21 by in-mold molding is also applied to the top plate portion 1a of the lid 1 of the container that is thin-walled with a thickness of 0.35 mm to 0.60 mm that covers the opening of a wide-mouthed container such as yogurt or ice cream. Since it is possible to integrally form by heat welding, the lid A of an in-mold label-equipped container with a coupon function that can be provided at a low cost can be easily provided on the lid 1 of the container whose target is thin-walled molding. It is possible. The thickness of the sheet material 21 is preferably about 0.05 mm. In addition, when using a sheet having the cut 2c already formed on the sheet material 21, the sheet material 21 made of a material that is easily broken is used, and the cut 2c is formed by in-mold molding and pressing a blade such as a cutter. In this case, it is preferable to use the sheet material 21 which is not easily broken.

Furthermore, as for the material of the sheet material 21 used in the molded product of the present invention, the sheet material 21 to which heat is applied at the time of molding is stretched by using a stretchable sheet material made of a synthetic resin material. It is temporarily bonded to 1a and becomes the lid A of the container with an in-mold label.

Further, the sheet material 21 was peeled off by applying the sheet material adhesive layer 2g shown in FIG. 8 to a part of the back surface of the knob 2a installed at a position opposite to the position where the peeling of the sheet material 21 is started. In this case, since a part of the sheet material 21 remains adhered to the top plate portion 1a, the user can decorate the decoration contents with decorations and characters on the back surface of the sheet material 21 for the use of a label with a coupon function. Even after being turned over, the sheet material 21 remains adhered to a part of the top plate portion 1a, so that it can be discarded together with the lid 1 of the container without becoming garbage.

9 to 11 show cut shapes in which the shape of the cut 2c1 cut into the sheet material 21 is different. A notch 2c1 is formed in the periphery of the gate position 3 shown in FIG. 9 on the side where the knob 2a is installed with the center of the gate position 3 as a reference, by cutting a semicircular outer perimeter line having a diameter of 15 mm to 20 mm. Further, a vertical cut 2c1 is formed upward from both ends of the outer peripheral cut 2c1. When the sheet material 21 is peeled off by installing two or more connecting surfaces 2d connecting the inner sheet material 2h and the outer sheet material 2i on the line of the cut 2c1, the inner sheet from the cut 2c1. The material 2h is pulled out while being welded to the top plate portion 1a in a semicircular and U-shape at the sheet material welding position 2f while being welded to the top plate portion 1a of the lid 1 of the container with the cut 2c1 as a boundary.

Therefore, since the back surface of the outer sheet material 2i is peeled off from the surface of the top plate portion 1a to form the sheet material peeling surface 2e, printing of characters, patterns, photographs, etc. is performed on the back surface of the sheet material 21. Therefore, it is possible to provide the lid A of the container with an in-mold label with a coupon function that can be provided at low cost. The step of forming the cut 2c1 may be performed by in-mold molding using a sheet material 21 formed in advance, and the sheet material 21 in which the cut 2c1 is not formed is used first. After that, the post-processed cutter formed in the shape of the cut 2c1 is only the thickness of the sheet material 21 so as to include the periphery of the gate position 3 of the lid 1 of the container to which the sheet material 21 is welded. A method of forming the cut 2c1 by pressing may be used.

Further, the sheet material 21 was peeled off by applying the sheet material adhesive layer 2g shown in FIG. 11 to a part of the back surface of the sheet material 21 at a position opposite to the knob 2a at the position where the peeling of the sheet material 21 is started. In this case, since a part of the sheet material 21 remains adhered to the top plate portion 1a, the user can decorate the decoration contents with decorations and characters on the back surface of the sheet material 21 for the use of a label with a coupon function. Even after being turned over, the sheet material 21 remains adhered to a part of the top plate portion 1a, so that it can be discarded together with the lid 1 of the container without becoming garbage.

DESCRIPTION OF SYMBOLS 1 Container lid 1a Top plate part 1b Side wall part 2 Sheet material 21 Sheet material 2a Knob part 2b Folding line 2c Cut 2c1 Cut 2d Connection surface 2e Sheet material peeling surface 2f Sheet material welding position 2g Sheet material adhesion layer 2h Inner sheet material 2i Outer sheet material 3 Gate position A Cover of container with in-mold label

Claims (6)

A lid of a container made of a synthetic resin material that extends from the outer periphery to the lower end of the top plate portion to form an annular side wall portion, and a lid of a container with a label formed by attaching a synthetic resin material sheet material to the top plate portion. The sheet material in contact with the gate position of the lid of the container is formed with a cut so as to include the periphery of the gate position, and the sheet material has a thermoformable peelable film, and the sheet material The in-mold is characterized in that the inner sheet material remains on the lid of the container and the other sheet material is peeled off at the boundary of the cut of the sheet material provided around the gate position. Labeled container lid. The lid of the container with an in-mold label according to claim 1, wherein two or more connection surfaces for connecting the inner sheet material and the outer sheet material are installed on the cut line. The lid of the container with an in-mold label according to claim 1 or 2, wherein the back surface of the sheet material is decorated. The lid of the container with an in-mold label according to any one of claims 1 to 3, wherein an adhesive layer is applied to a part of the back surface of the sheet material near the outer periphery of the sheet material. The sheet material formed by forming a knob on a part of the outer periphery of the sheet material, and heat-sealing the sheet material bent so as to cover the knob from the outside to the inside of the sheet material. The lid | cover of the container with an in-mold label of any one of 4.   The lid of the container with an in-mold label according to any one of claims 1 to 5, wherein a part of the outer periphery of the sheet material has a part peeled from the top plate part.