JP2019206348A - Lid material - Google Patents

Abstract

To provide a laminated lid material, with no need of a plastic lid, made up of a lower lid and a detachable upper lid, which is scratch-resistant and cannot be pierced with a straw unless the upper lid as a protective cover is removed.SOLUTION: A lid material is used as thermally sealed over an opening of a container, and consists of a lower lid 2 with a sealant layer 11 for thermal sealing on an opening of a container 20 and an upper lid 3 adhered detachably on the lower lid. The boundary face 10 of the lower lid and the upper lid has a stretchable and heat-sealable polypropylene resin layer 13 on one side and an extruded polyethylene resin layer 14 on the other side. The lower lid can be pierced with a straw or the like, and the upper lid cannot be pierced with a straw or the like and has a rupture-resistant property. A print display or a colored display is arranged on the upper lid for confirmation of whether or not it has been detached.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lid material, and more particularly, to a lid material suitable for use by being stabbed with a straw in a laminated lid material used by heat-sealing an opening portion of a container having an opening portion on an upper portion.

  There are many products in the form of packaging in which a cup-shaped container is filled with a beverage and the opening is heat-sealed with a lid. In this case, there is a type in which the lid member is pierced with an attached straw and is drunk.

  When the lid is pierced with a straw and is drunk, the surface of the lid needs to be hygienic. For this reason, it is a common practice to provide a plastic outer lid that covers the entire lid material outside the lid material. However, since the plastic outer lid is a separate member in addition to its own cost, there is a problem in that the cost increases due to the addition of a process for attaching the outer lid. .

  The sealed container described in Patent Document 1 is made in order to solve this problem, and is a sealed body having a seal portion in which a lid member is sealed at a mouth edge portion of the opening portion of a container body having an opening portion. In the container, the lid member has a structure in which a protective layer is provided via a sealing base material having a sealing layer on a lower surface, and a separation layer provided on the upper surface of the sealing base material. It is made of a pierceable material.

  As for the lid | cover material of the sealed container described in patent document 1, it is natural that the sealing base material which comprises a lid | cover material is comprised from the material which can be stabbed with a straw, The lid | cover which added the protective layer There is a case where the entire material can be pierced, and there is a risk that an accident of piercing the straw without removing the protective layer may occur.

  This also means that there is a possibility that objects may hit the surface of the lid material during transportation or the like, and the lid material may be damaged or a hole may be opened by mischief. .

JP 2008-230684 A

  The problem to be solved by the present invention is that a laminated lid material composed of a lower lid and a peelable upper lid that does not require a plastic outer lid can be pierced with a straw unless the upper lid serving as a protective layer is removed. It proposes a lid that cannot be scratched on the surface.

  As means for solving the above-mentioned problems, the invention according to claim 1 is a lid member that is used by heat-sealing the opening of the container, and has a sealant layer for heat-sealing the opening of the container. A lower lid and an upper lid that is detachably bonded to the lower lid. One surface of the peeling interface between the lower lid and the upper lid is a heat-sealable stretched polypropylene resin, and the other surface is an extruded polyethylene resin. The lower lid can be pierced with a straw, etc., and the upper lid cannot be pierced with a straw or the like, has breakage resistance, and has a printed display or a colored display that can confirm the presence or absence of peeling. It is the lid | cover material characterized by having.

  A container using the lid material according to the present invention is composed of an upper lid and a lower lid which are detachably bonded, and the lower lid can be pierced with a straw or the like. Can be drunk.

  The invention according to claim 2 is the lid according to claim 1, further comprising a handle protruding from the outer periphery of the container for peeling only the upper lid.

  The invention according to claim 3 is the lid material according to claim 2, further comprising a handle protruding from the outer periphery of the container for peeling off both the upper lid and the lower lid.

The lid material according to the present invention comprises a lower lid having a sealant layer and an upper lid that is detachably bonded to the lower lid. The lower lid can be pierced with a straw or the like, and the upper lid is pierced with a straw or the like. Since it is impossible and has breakage resistance, it can be sanitized by piercing a straw from the container using the lid material according to the present invention with the upper lid peeled off and the lower lid exposed. .
On the other hand, since the upper lid has resistance to breakage, it has the necessary resistance to scratches and perforations during transportation before peeling the upper lid, and there is no fear of mischief such as a child opening a hole with a finger. . In addition, since the upper lid is printed or colored so that the presence or absence of peeling can be confirmed, there is no problem of piercing a straw without inadvertently peeling the upper lid.
Since one side of the peeling interface between the lower lid and the upper lid is heat-sealable stretched polypropylene resin and the other side is extruded polyethylene resin, none of the peeling surfaces is sticky, and no hygienic problems arise . In addition, once the upper lid has been peeled off, it cannot be bonded again, so that the effect of preventing mischief is exhibited.

  The resin layer that constitutes the peeling interface between the lower lid and the upper lid is a general material, and since it is a highly efficient production method in which polyethylene resin is extruded and laminated on the HS-OPP resin surface, it is inexpensive. Can be manufactured.

  According to the second aspect of the invention, since the handle protruding from the outer periphery of the container for peeling only the upper lid is provided, the upper lid can be easily peeled off.

  In the case of having a handle projecting from the outer periphery of the container for peeling off both the upper lid and the lower lid as in the invention described in claim 3, without using a straw, all the lid materials are opened and the contents are taken out. Sometimes convenient.

FIG. 1 is a schematic view showing an example of use of a lid material according to the present invention. FIG. 2 is a cross-sectional explanatory view schematically showing the method of using the lid according to the present invention. FIG. 3 is a cross-sectional explanatory view schematically showing one embodiment of the lid according to the present invention. FIG. 4 is a cross-sectional explanatory view schematically showing another embodiment of the lid according to the present invention. FIG. 5 is an explanatory plan view showing one embodiment of the lid member according to the present invention, and shows a state seen from the lower lid side. FIG. 6 is an explanatory plan view showing another embodiment of the lid member according to the present invention, and shows a state seen from the lower lid side.

  Hereinafter, the lid according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing an example of use of a lid 1 according to the present invention. The lid 1 is heat-sealed at the opening of a cup-shaped container body 20, and a part of the upper lid 3 is peeled off. The state which stabbed the straw 21 is shown. Moreover, FIG. 2 is sectional explanatory drawing which showed typically the usage method of the cover material 1 which concerns on this invention. FIG. 3 is an explanatory cross-sectional view schematically showing one embodiment of the lid according to the present invention.

  A lid material 1 according to the present invention is a lid material that is used by being heat-sealed at an opening of a container, and includes a lower lid 2 having a sealant layer 11 for heat-sealing at the opening of the container, It consists of an upper lid 3 bonded so as to be peelable. One surface of the peeling interface 10 between the lower lid 2 and the upper lid 3 is heat-sealable stretched polypropylene resin (hereinafter abbreviated as HS-OPP resin), and the other surface is extruded. Ink so that the lower lid can be pierced with a straw, etc., the upper lid cannot be pierced with a straw, etc., has fracture resistance, and can be checked for peeling. The cover material is characterized by being printed or colored by the layer 16.

  Since the lid 1 according to the present invention is such that the lower lid 2 that can be pierced with a straw or the like and the upper lid 3 that cannot be pierced are detachably bonded, the opening of the container body 20 is heat-sealed. By peeling off the upper lid 3, the straw 21 can be pierced into the lower lid 2 and the contents can be drunk. Since the surface of the lower lid 2 immediately after the upper lid 3 is peeled off is clean, no hygiene problem occurs even if the straw is pierced.

  In the state before the upper lid 3 is peeled off, it is impossible to pierce with a straw or the like. Therefore, the upper lid 3 is not accidentally peeled and removed, and the straw is not pierced. There is no fear of being scratched or torn.

  As for the peeling interface between the lower lid 2 and the upper lid 3, one surface is HS-OPP resin and the other surface is extruded polyethylene resin. This peeling interface is obtained by extruding and laminating a polyethylene resin on the HS-OPP resin film surface. Usually, in the case of extrusion lamination, for the purpose of improving the adhesive force, it is customary to perform easy adhesion treatment such as corona discharge treatment, ozone treatment, and further anchor coating treatment. When manufacturing, it is better not to perform these surface treatments.

  Neither the HS-OPP resin film surface nor the polyethylene resin surface constituting the release interface has adhesiveness. If the release interface is sticky, dust and dust adhere to it, which is a sanitary problem, but such a problem does not occur in the lid according to the present invention.

  In addition, once the peeling interface is peeled off, it cannot be bonded again, so that there is a so-called tamper-proof effect for preventing mischief or the like caused by the child.

  Either the lower lid or the upper lid may be used for the HS-OPP resin film surface and the polyethylene resin surface constituting the peeling interface. In the configuration shown in FIG. 3, the lower lid 2 side is the HS-OPP resin layer 13, and the upper lid 3 side is the extruded polyethylene resin layer 14. In the configuration shown in FIG. 4, the lower lid 2 side is an extruded polyethylene resin layer 14 and the upper lid 3 side is an HS-OPP resin layer 13.

As a layer structure of the lower lid 2, a sealant layer 11 for heat sealing to the container body 20 and one of the resins constituting the peeling interface, that is, an HS-OPP film or an extruded polyethylene resin layer are essential. is there. In the example shown in FIGS. 3 and 4, the lower lid base material layer 12 exists in addition to these. The lower lid base material layer 12 may be a single layer film, paper, metal foil, or may be a multilayer film, paper, metal foil or the like. The lower lid base material layer 12 can be omitted.

  The material of the sealant layer 11 is selected according to the material of the container body 20. Specifically, low density polyethylene resin (LDPE), medium density polyethylene resin (MDPE), linear low density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene-α olefin copolymer , Ethylene resins such as ethylene-methacrylic acid resin copolymer, polyethylene and polybutene blend resin, homopolypropylene resin (PP), propylene-ethylene random copolymer, propylene-ethylene block copolymer, propylene- Polypropylene resins such as α-olefin copolymers are used.

  As the material of the lower lid base material layer 12, various synthetic resin films such as low density polyethylene resin (LDPE), high density polyethylene resin (HDPE), linear low density polyethylene resin (LLDPE), polypropylene resin (PP), polyolefin Polyolefin resin such as polyethylene elastomer, polyester resin such as polyethylene terephthalate resin (PET), polybutylene terephthalate resin (PBT), polyethylene naphthalate resin (PEN), cellulose resin such as cellophane and cellulose triacetate (TAC) resin , Polymethyl methacrylate resin (PMMA), ethylene-vinyl acetate copolymer resin (EVA), ionomer resin, polybutene resin, polyacrylonitrile resin, polyamide resin such as nylon-6 and nylon-66, One or more types selected from synthetic resin films such as styrene resin (PS), polyvinyl chloride resin (PVC), polyvinylidene chloride resin (PVDC), polycarbonate resin (PC), fluorine resin, urethane resin, etc. Can be used in combination.

  As a material for the lower lid base material layer 12, materials such as paper and aluminum foil can be used in addition to the synthetic resin film. For laminating these layers, a dry laminating method using an adhesive or an extrusion laminating method using a PE resin is used.

As the layer structure of the upper lid 3, in addition to one of the resins constituting the peeling interface, that is, the HS-OPP film or the extruded polyethylene resin layer, the carrier film of the ink layer 16 for performing printing display or coloring display Is essential. The ink layer 16 may be provided on the surface of the carrier film, or may be provided on the back surface of the film if the carrier film is transparent. As the display content, it is desirable to display such that it can be understood that the lower lid 2 can be stabbed with a straw after the upper lid 3 is peeled off.
In the example shown in FIGS. 3 and 4, the transparent film layer 17 is used as the carrier film of the ink layer 16, and the ink layer 16 is provided on the back surface of the transparent film 17. In addition to these, there is an upper lid base material layer 15. As the upper lid base material layer 15, a single film or a multilayer film can be used. The upper lid 3 appropriately selects the thickness and the layer configuration of each film in order to exhibit puncture resistance.

  As the puncture resistance of the lid material 1, it is desirable that the puncture strength is 15N or more in the “Puncture Strength Test” defined in the plastic film general rules for food packaging. Further, the puncture resistance of the lower lid is desirably less than 15N in the same test method. In addition, it is more preferable if the piercing strength of the upper lid 3 alone is 15 N or more.

  As the transparent film layer 17, a transparent resin film having a material and thickness that can withstand the tension during printing, such as a stretched PP resin film, a PET resin film, and a stretched nylon film, is used in consideration of printability.

  As a material used for the upper lid base material layer 15, one kind or plural kinds of synthetic resin films selected from the same various synthetic resin films as used for the lower lid base material layer 12 can be used.

  FIG. 5 is an explanatory plan view showing an embodiment of the lid 1 according to the present invention, and shows a state viewed from the lower lid 2 side. This example is a lid material for sealing the opening of a circular cup-shaped container, and at least the handle 4 protruding from the opening of the container and the base of the handle 4 to peel off only the upper lid. A cut 5 for cutting the lower lid layer is provided. The cut 5 is provided in the immediate vicinity of the outside of the opening of the container. Note that the lower lid of the handle 4 may be removed in advance.

  FIG. 6 is an explanatory plan view showing another embodiment of the lid 1 according to the present invention, and similarly shows a state seen from the lower lid 2 side. In this example, in addition to the handle 4a protruding from the outer periphery of the container for peeling only the upper lid 3, a handle 4b protruding from the outer periphery of the container for peeling both the upper lid 3 and the lower lid 2 is provided. It is. Unlike the handle 4b, the handle 4b is not provided with a cut. By doing in this way, in addition to drinking with a straw, all the lid | cover materials 1 can be peeled and removed and can be drunk, or the contents can be moved to another container. Instead of providing the handle 4b, the size of the lid may be made larger than the size of the opening of the container so that the edge of the lid protrudes from the opening of the container. Hereinafter, an example is shown and a lid material concerning the present invention is explained concretely.

<Example 1>
After printing and displaying on the back surface of a transparent polyethylene terephthalate film having a thickness of 12 μm by a gravure printing method, an HS-OPP film having a thickness of 20 μm was dry laminated on the printed surface to form an upper lid. As the lower lid, a polypropylene (PP) resin film having a thickness of 30 μm was used as a sealant layer, and this was dry-laminated with an aluminum foil having a thickness of 7 μm. The aluminum foil surface of the laminate and the upper lid were bonded together by extrusion lamination with a polyethylene resin having a thickness of 13 μm to obtain a lid material.

<Example 2>
After printing and displaying on the back surface of a transparent nylon film having a thickness of 15 μm by a gravure printing method, an HS-OPP film having a thickness of 20 μm was dry laminated on the printing surface to obtain an upper lid. As the lower lid, a polypropylene (PP) resin film having a thickness of 30 μm was used as a sealant layer, and this was dry-laminated with an aluminum foil having a thickness of 7 μm. The aluminum foil surface of the laminate and the upper lid were bonded together by extrusion lamination with a polyethylene resin having a thickness of 13 μm to obtain a lid material.

  Each lid member was heat-sealed at the opening of a PP resin cup-shaped container. Each of the lid materials had sufficient puncture resistance to fingers and straws when the upper lid was not peeled off, and could be easily pierced by the straws when only the lower lid was peeled and removed. Moreover, the peelability of the upper lid was also good.

DESCRIPTION OF SYMBOLS 1 ... Lid material 2 ... Lower lid 3 ... Upper lid 4, 4a, 4b ... Handle 5 ... Cut 10 ... Separation interface 11 ... Sealant layer 12 ... Lower lid Base material layer 13 ... heat-sealable stretched polypropylene resin layer 14 ... extruded polyethylene resin layer 15 ... upper lid base material layer 16 ... ink layer 17 ... transparent film layer 20 ... container body 21 ···straw

Claims (3)

  A lid material used by heat-sealing at the opening of the container, comprising a lower lid having a sealant layer for heat-sealing at the opening of the container, and an upper lid that is peelably bonded to the lower lid, One surface of the peeling interface between the lower lid and upper lid is heat-sealable stretched polypropylene resin, the other surface is extruded polyethylene resin, the lower lid can be pierced with a straw, etc., and the upper lid is pierced with a straw or the like A lid material that is impossible, has break resistance, and is printed or colored so that the presence or absence of peeling can be confirmed.   The lid material according to claim 1, further comprising a handle projecting from the outer periphery of the container for peeling only the upper lid.   The lid material according to claim 2, further comprising a handle protruding from the outer periphery of the container for peeling off both the upper lid and the lower lid.

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