JP4910325B2 - Lid material - Google Patents

Description

  The present invention relates to a lid material, and more particularly, to a lid material having both sealing performance, storage stability, designability, and easy openness.

In the present specification, “ratio”, “part”, “%” and the like indicating the composition are based on mass unless otherwise specified, and the “/” mark indicates that they are integrally laminated.
"LDPE" is "low density polyethylene", "LLDPE" is "linear low density polyethylene", "PO" is "polyolefin", "PS" is "polystyrene", "PET" is "polyethylene terephthalate" , And “HM” are abbreviations, functional expressions, common names, or industry terms for “hot melt”.

  (Main use) The main use of containers and packaging using the lid material of the present invention is dessert such as pudding, yogurt, cake, etc., which has good sealing, storage, design, and easy openability. is there. However, the application is not particularly limited as long as the application requires sealing performance, storage stability, designability, and easy openness.

(Background Art) Desserts are often packaged in cup-shaped containers, and are relatively soft, so that the shape is maintained and the contents themselves are beautiful. Therefore, the container and / or the cover material is made transparent or molded into a three-dimensional shape. However, when the lid is molded into a three-dimensional shape, the sealing part with the container is easily deformed, and the sealing performance with the container is deteriorated. Also, the easy openability at the time of opening is also deteriorated due to the restriction of the lid material. End up.
Therefore, the container and packaging lid material has a sealing property when filling the contents, does not leak during distribution, has eye-catching properties and a design property such that the contents can be seen during retailing, and is easy when opened. Openness is required.

(Prior Art) Conventionally, a lid member formed with a container is a fitting type lid member, and cannot be sealed by fitting, so that there is a disadvantage that the storage stability of the contents is low.
Also, a can lid sealing sheet material that is fused by high frequency heating to a polyethylene resin frame (corresponding to the outer edge portion of the present invention) provided in the opening portion of the can lid of the milk powder container so that the opening portion is detachably sealed. There is known a lid member (corresponding to the central part of the present invention) covering the opening of the can lid (see, for example, Patent Document 1). However, there is a problem that the sealing sheet material is flat and lacks in design, and the content portion cannot be seen because it is opaque.
Furthermore, the present applicant provides a release agent layer having a width wider than or equal to that of the seal portion in a portion corresponding to the seal portion on the back surface of the base material layer, and is provided on the side in contact with the base material layer of the thermal adhesive resin layer. At least the surface portion corresponding to the inner peripheral portion of the seal portion is provided with a large number of fine irregularities (for example, see Patent Document 2). However, the sealing sheet material for the opening (corresponding to the central portion and the outer edge portion of the present invention) is composed of one member, and is flat and lacks in design.

JP-A-6-100028 Japanese Patent Laid-Open No. 9-99978

  Accordingly, the present invention has been made to solve such problems. The object is to provide a lid that combines sealing properties when filling the contents, preservability during distribution, designability during retail, and easy openability during opening.

In order to solve the above-mentioned problems, the lid according to the invention of claim 1 is such that the lid that seals to the flange at the outer edge of the opening of the container is substantially flat with the central part that is the molded product. consists of a outer edge, a lid for the central portion and the outer portion are integral, a central portion least 1 part transparent domed central portion of the lid, the outer edge of the lid member parts is a donut-shaped by removing a substantial portion of the de-over arm type center portion of the outer edge, the outer edge portion comprises a first opening piece and the second opening piece, the first opening piece and the between the second opening piece, a half cut is provided in the tangential direction against the domed central portion, pulling the first opening piece to the tangent direction to the domed central portion, peeling to opened, opened and then peeled off the second opening piece, a lid member, wherein a call to a two-step opening.

ADVANTAGE OF THE INVENTION According to this invention, the cover material which has the sealing performance at the time of packaging a content, the preservability at the time of distribution, the designability at the time of retail, and the easy open property at the time of opening is provided. Since it can be easily opened without deforming and destroying the seal portion, a lid material that can be opened without spilling the contents or collapsing the form is provided. A lid is provided that can be opened in two stages, with one part opened to provide additional functionality such as draining and breathability, and then all open. Since the contents can be seen from the three-dimensional transparent portion, a lid with good design and eye-catching properties at retail is provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a cross-sectional view of a container package using a lid material showing a reference example.
FIG. 2 is a plan view of a lid member showing a reference example .
FIG. 3 is a perspective view illustrating an image of a lid, a container, and container packaging .
FIG. 4 is a reference diagram for explaining the opening function of the lid member.
FIG. 5 is a reference diagram for explaining the opening function of the lid member.
FIG. 6 is a plan view for explaining the opening function of the lid member of the present invention.

  (Invention of Product) As shown in FIG. 1, the lid 10 of the present invention can be sealed to the flange portion 41 of the container 40 by the seal portion 11. The center portion 20 is a molded product, and the outer edge portion 30 is substantially flat. The center portion 20 and the outer edge portion 30 of the lid member 10 are sealed with a seal portion 21 as shown in FIG. FIG. 3 shows images of the lid member 10 and the container 40 before and after sealing.

  (Cover Material) The lid material 10 is composed of a central portion 20 and an outer edge portion 30, and the central portion 20 and the outer edge portion 30 are sealed with a seal portion 21. In FIG. 1, for the sake of easy understanding, the central portion 20 and the outer edge portion 30 are sealed with a gap, but may be in close contact with no gap.

  (Center part) The center part 20 is a three-dimensional molded product, and preferably at least one part is transparent. Since the contents can be seen from the three-dimensional transparent part, the design is good and the eye catching at retail is good. The transparency may be colorless or colored, and may be printed or a label prepared separately may be pasted while leaving the transparent part in one part.

  (Molding method) The molding method is not particularly limited, and examples thereof include an injection molding method, a blow molding method, a mold molding method, a press molding method, and a sheet molding method. As a sheet forming method, vacuum forming, pressure forming, vacuum / pressure forming, plug assist forming method and the like can be applied.

  (Material) As a material used for the central portion, various materials can be applied depending on the use as long as there is formability, packaging suitability, content resistance, and the like. For example, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer, polyamides such as nylon (trade name) 6 Resin, polyolefin resin such as polyethylene, polypropylene, polybutene, or polymethylpentene, cyclic polyolefin resin such as polynorbornene, vinyl resin such as polyvinyl chloride, polyacrylate, polymethacrylate, or polymethylmethacrylate ( Examples include methacrylic resins, polystyrene, high-impact polystyrene, AS resins, and styrene resins such as ABS resins, polycarbonate resins, and acetal resins. These may be used singly or in plural, with various additives such as colorants added as necessary, and appropriately selected according to the molding method.

  (Outer edge portion) The outer edge portion 30 is substantially flat. “Substantially flat” may be a film or sheet in which minute irregularities are ignored. The outer edge portion 30 may be transparent or opaque, and may be a single layer or a plurality of laminated materials, and is preferably a laminated material because various functions can be imparted. The structure of the laminated material may be a known one generally used in packaging materials, and is not particularly limited. For example, PO-based / paper / PO-based, PO-based / paper / Al / PO-based, PO-based / PET / PO system / paper / Al / PO system, PET / PO system, PET / Al / PO system, PET / HS material, PS / HS material, PS / HM, etc. are applicable. Here, the PO system means an olefin resin such as LDPE, LLDPE, PP and polybutene 1, a copolymer resin of an olefin such as ethylene-vinyl acetate copolymer (EVA) and other monomers, and an ethylene-unsaturated acid. Examples include an ionomer obtained by metal-crosslinking a copolymer, and an acid-modified polyolefin resin obtained by modifying a polyolefin resin such as polyethylene or polypropylene with an unsaturated carboxylic acid such as maleic anhydride. These may be used singly or as a mixture of two or more kinds (blends) or multiple laminates. Laminates are manufactured using known techniques generally used in packaging materials, such as coating methods such as roll coating, gravure coating, comma coating, and bar coating, dry lamination methods, extrusion coating methods, and coextrusion coatings. Extrusion lamination methods such as the method can be applied.

  (Sealing of the central portion and the outer edge portion) The central portion 20 and the outer edge portion 30 of the lid member 10 are sealed with a sealing portion 21 as shown in FIG. The sealing portion 21 may be sealed by a known heat sealing method (HS method), impulse sealing method, high frequency sealing method or the like. Moreover, you may provide the opening piece 43 as needed. As for the positional relationship between the central portion 20 and the outer edge portion 30, the outer edge portion 30 is sealed on the upper side of the container in FIG.

(Container) The container 40 may be transparent or opaque, and may be a single layer or a plurality of laminated materials.
The molding method of the container 40 is not particularly limited, and for example, an injection molding method, a blow molding method, a molding method, a press molding method, a sheet molding method, or a paper cup shape can be applied.

  (Molding) As a sheet forming method, vacuum forming, pressure forming, vacuum / pressure forming, plug assist forming method and the like can be applied. As a material used for the molding method, various materials can be applied depending on the use as long as there is formability, packaging suitability, content resistance, and the like. For example, polyester resins such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or terephthalic acid-cyclohexanedimethanol-ethylene glycol copolymer, polyethylene, polypropylene, polybutene, or polymethylpentene Polyolefin resin such as polynorbornene, cyclic polyolefin resin such as polynorbornene, vinyl resin such as polyvinyl chloride, (meth) acrylic resin such as polyacrylate, polymethacrylate, or polymethyl methacrylate, polystyrene, high impact polystyrene, There are styrene resins such as AS resin or ABS resin, polycarbonate resins, acetal resins and the like. These may be used singly or in plural, with various additives such as colorants added as necessary, and appropriately selected according to the molding method.

  (Paper cup) The paper cup shape is a so-called paper cup, and is preferably formed from a plurality of laminated materials into a paper cup shape in order to impart functionality. The configuration of the paper cup laminated material is not particularly limited, and for example, PO type / paper / PO type, PO type / paper / Al / PO type, PO type / PET / PO type / paper / Al / PO type, etc. are applicable. It can be made into a cup shape with a flange by a known paper cup molding machine. Further, a pillar pack (product name) in which a plurality of laminated materials as described above are used as an insert blank and integrated by injection molding and a flange portion is formed may be used.

(Sealing container and lid)
The container 40 is filled with the contents, and as shown in FIG. 1, the seal portion of the outer edge portion 30 of the lid member 10 and the seal portion of the container 40 are sealed to form a seal portion 11 and sealed. The seal is selected from a known heat seal method (HS method), impulse seal method, high frequency seal method, etc. according to the material of the seal portion of the outer edge portion 30 of the lid member 10 and the material of the seal portion of the container 40. Seal to form a package.

  (Packaging body) The packaging body is hermetically sealed by melting and heat-sealing, so that the preservability during distribution and storage is maintained, and the design property at retail is excellent. The outer periphery of the outer edge portion 30 of the lid member 10 may be cut into a predetermined shape in advance before sealing, or may be cut into a predetermined shape after sealing. In any case, an opening piece 43 may be provided on the outer periphery of the outer edge portion 30 of the lid member 10 as necessary, and is illustrated in FIGS. 4 to 6, but is not limited thereto.

  (Opening of the lid material) In addition to the sealing property when packaging the contents, the preservability at the time of distribution, and the design property at the time of retailing, the package has an easy-opening property and functionality at the time of opening. 6 will be described. For convenience of drawing, the central portion is drawn flat in FIGS. 4 to 6, but it is a three-dimensional shape by molding.

  (Easy Opening of Lid Material) As shown in FIG. 4, when the unsealing piece 43 is lifted, the seal part 11 composed of the flange part 41 of the container 40 and the outer edge part 30 of the lid material 10 is easy open and can be easily opened. The contents can be opened without spilling or losing shape without deforming and destroying the seal portion. Moreover, what is necessary is just to select easy open property from a well-known technique and the above-mentioned material.

  (Opening the outer edge portion) As shown in FIG. 5, when the opening piece 43 is lifted, the outer edge portion 30 of the lid member 10 can be opened easily along the flange portion 41 of the container 40. It becomes easy to take out even a large one.

  (Two-stage opening) As shown in FIG. 6, if a first opening piece 43 and a second opening piece 45 are provided on the outer edge 30 of the lid member 10, the opening can be made in two stages. . First, pulling with the first opening piece 43 peels off from the flange portion, and at the same time, the portion with the central portion 20 corresponding to the peeled portion can also be peeled to open only one portion. Additional functionality such as draining and breathability can be imparted to the portion by utilizing the opening. Next, when the second opening piece 45 is pulled, the whole can be opened and the contents can be easily taken out.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further in detail, it is not limited to this.

( Reference Example ) As a container, an injection molded PS container used for so-called pudding or the like was used. The central portion 20 of the lid member is formed of a PS sheet by a vacuum sheet forming method as shown in FIG. The outer edge portion 30 of the lid material was printed on the back surface of a 75 μm thick PET sheet, hot melt was applied in a mesh shape, an opening piece was attached as shown in FIG. 3, and the center portion was removed to obtain a donut shape. The center part 20 was overlapped on the hole part of the donut part and heat-sealed to obtain a lid member 10. After the container 40 was filled with the contents, the lid member 10 was put on, and the outer edge portion 30 of the lid member 10 and the flange portion 41 of the container 40 were heat sealed. From the transparent central portion 20, the contents looked visually and the design was good. When the opened piece was pulled open, it was easily opened.

( Example ) As a container, a paper cup used for a so-called pudding or the like in a known cup molding machine was manufactured using a laminated body of LDPE / paper / LDPE / PET / Al / LDPE as a cup body. The central portion 20 of the lid member is made of a dome shape as shown in FIG. 3 by injection molding of acrylic resin. The outer edge portion 30 of the lid member is formed by using a laminated material of acid-modified PE / printing / Al / LDPE / paper / LDPE / acid-modified PE, and a first opening piece 43 and a second opening piece 45 are attached as shown in FIG. A half cut was provided between the first opening piece 43 and the second opening piece 45, and the center portion was removed to form a donut shape. The center part 20 was overlapped on the hole part of the donut part, and heat-sealed to obtain a lid member 10. After the container 40 was filled with the contents, the lid member 10 was put on, and the outer edge portion 30 of the lid member 10 and the flange portion 41 of the container 40 were heat sealed. From the transparent central portion 20, the contents looked visually and the design was good. First, the first opening piece 43 was pulled, and only one part could be opened. If necessary, operations such as hot water cutting could be performed. Further, when the second opening piece 45 was pulled, the entire opening could be opened easily.

It is sectional drawing of the container package using the cover material which shows a reference example. It is a top view of the cover material which shows a reference example . It is a perspective view explaining the image of a cover material, a container, and container packaging . It is a reference figure explaining the opening function of a cover material. It is a reference figure explaining the opening function of a cover material. It is a top view explaining the opening function of the lid | cover material of this invention.

Explanation of symbols

10: Lid material 11, 21: Sealing part 20: Center part 30: Outer edge part 40: Container 41: Flange part 43, 45: Opening piece

Claims (1)

The lid member for sealing to the flange portion on the outer edge of the opening of the container is composed of a central portion and a substantially flat outer edge medium is a molded article are integral and the central portion and the outer edge portion lid The lid is made of a doughnut-shaped central portion having a transparent dome-shaped central portion, and the outer edge portion of the lid material is removed by removing a corresponding portion of the dome-shaped central portion from the outer edge portion. The outer edge portion includes a first opening piece and a second opening piece, and a half cut is provided between the first opening piece and the second opening piece in a tangential direction with respect to the central portion of the dome shape. Te, drawn tangential said first opening piece to the front Symbol domed central portion, peeled open, opens then release peeling the second opening piece, and characterized in that two-stage opening Cover material.

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