Lid material for container

Abstract

To provide a lid material for container which can enhance hygiene and reduce cost.SOLUTION: A lid material for container 1 comprises an adhesive base material 14, a shape retaining base material 13, a printing base material 12, and a top base material 11. Inside the outer peripheral edge of a flange 27, a first half cut 8 having a hole shape is provided from the backside of the adhesive base material 14 to an extent not reaching the surface of the printing base material 12. Inside the outer peripheral edge of the flange 27, a second half cut 6 is provided from the surface of the top base material 11 to an extent not reaching the backside. In a segment connecting the base ends of a pull tab part, a third half cut is provided from the backside of the adhesive base material 14 to an extent not reaching the surface of the printing base material 12. A peeling schedule part extends from the base ends of the pull tab part to an opposing outer peripheral edge so as to include a hole corresponding to the second half cut 6.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a lid material for containers. [Background technology]

[0002] A packaging container is known in which a cup-shaped container is filled with a beverage and the opening is sealed with a sheet-shaped container lid. In such a packaging container, the beverage can be drunk by inserting a straw (a suction member) separately provided into the container lid.

[0003] Incidentally, it is necessary to prevent the container lid from being damaged or peeled off during distribution, and the surface of the lid needs to be hygienic because a straw is inserted into the lid for drinking. For this reason, it is common to provide a plastic outer lid (overcap) that covers the entire container lid on the outside (see Patent Document 1 below). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-001218 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, even if most of the container lid material is covered with a plastic outer lid, when a user pierces it with a straw or the like, there is a risk that foreign matter such as dust that has entered through the insertion hole provided in the outer lid during distribution may enter the inside of the packaging container through the hole made by the straw. In addition, there is a problem with container lid materials with plastic outer lids in that the cost of the outer lid is increased.

[0006] The present invention has been made in consideration of such problems, and aims to provide a container lid material that prevents foreign objects from entering the interior when a suction member is inserted into a container, thereby improving hygiene and reducing costs. [Means for solving the problem]

[0007] (1) A container lid material according to an embodiment for achieving the above object has a lower layer substrate including at least an adhesive substrate, the back surface of which is sealed to a flange portion of a container body, and a top substrate laminated to a printing substrate via an adhesive and having a pull tab portion formed on a part of the outer periphery so as to extend beyond the flange portion, and a first half cut having a hole shape for sucking or removing contents from the container body is provided inside the outer periphery of the flange portion and from the back surface of the lower layer substrate to an extent not reaching the surface of the printing substrate, a second half cut is provided inside the outer periphery of the flange portion and from the surface of the top substrate to an extent not reaching the back surface, a third half cut is provided on a line segment connecting one side of the base end of the pull tab portion to the other side and from the back surface of the lower layer substrate to an extent not reaching the surface of the printing substrate, and a portion to be peeled off extends from both base ends of the pull tab portion toward the opposing outer periphery to include a hole corresponding to the second half cut. (2) In another embodiment of the container lid material, the lower layer substrate may preferably be configured to have an adhesive substrate whose back surface is sealed to the flange portion of the container body, and a shape-retaining substrate for retaining the shape of the lid that is laminated to the adhesive substrate via an adhesive. (3) In another embodiment of the container lid material, the printing substrate is composed of a film layer and a coating material layer, and the material of the coating material layer is preferably a coating agent for increasing the adhesive strength of areas other than the area corresponding to the intended peeling site of the film layer. Effect of the Invention

[0008] According to the present invention, it is possible to provide a container lid material that prevents foreign matter from entering the inside of a container when a suction member is inserted into the container, thereby improving hygiene and reducing costs. [Brief description of the drawings]

[0009] [Figure 1] 1 is a cross-sectional view showing a schematic example of a laminated structure of a container lid material according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view showing a schematic example of a layered structure of a printing substrate. [Diagram 3] FIG. 2 is a diagram showing the upper surface of the top substrate. [Figure 4] FIG. 2 is a diagram showing the upper surface of a printing substrate. [Diagram 5] FIG. 2 is a diagram showing the bottom surface of the adhesive base material. [Figure 6] 6A is a schematic diagram for explaining the use of the container lid material. Fig. 6(a) is a diagram showing a state in which a container with the container lid material 1 attached to the container body and a straw are prepared. Fig. 6(b) is a diagram showing how a user picks up the pull-tab part and pulls it up, causing the intended peeling portion to peel off from the top base material. Fig. 6(c) is a diagram showing how a straw is inserted into the insertion hole exposed after the intended peeling portion is cut off. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below does not limit the invention according to each claim of the claims. Also, not all of the elements and combinations described in the embodiment are necessarily essential to the solution of the present invention. Note that in the following description, for convenience, the up-down direction when the container body 10 is upright is defined as up-down. That is, the bottom side of the container body 10 is defined as down, and the side opposite the bottom is defined as up. Also, the front and back surfaces of the substrate may be referred to as the top and bottom, respectively.

[0011] Fig. 1 is a cross-sectional view showing a typical example of a layered structure of a container lid material according to an embodiment. Fig. 2 is a cross-sectional view showing a typical example of a layered structure of a printing substrate. Fig. 3 is a view showing the upper surface of a top substrate. Fig. 4 is a view showing the upper surface of a printing substrate. Fig. 5 is a view showing the lower surface of an adhesive substrate. Fig. 6 is a schematic view explaining the use of a container lid material.

[0012] The container body 10 is made of a resin molded product such as expanded polystyrene resin, has a cylindrical side wall whose outer diameter gradually decreases downward, and has a bottom at the lower end. It is formed into a bottomed cylinder with a circular opening on the upper surface. An annular flange 27 is provided extending horizontally from the periphery of the opening. A circular container lid 1 is adhered to the flange 27 with a seal, sealing the opening of the container body 10.

[0013] (Lid material for containers) The container lid material 1 is formed by stacking a top substrate 11, a printing substrate 12, a shape-retaining substrate 13, and an adhesive substrate 14 in this order from above the container body. The top substrate 11 and the printing substrate 12 are configured as upper substrates of the container lid material 1, and the shape-retaining substrate 13 and the adhesive substrate 14 are configured as lower substrates of the container lid material 1. A peel-off pull tab portion (insertion hole exposing tab) 21 is provided at one location in the circumferential direction on a part of the outer periphery of the container lid material 1, protruding from the outer periphery. The pull tab portion 21 is formed by overlapping pull tabs formed in the same shape on the top substrate 11, the printing substrate 12, the shape-retaining substrate 13, and the adhesive substrate 14. In the following description, for convenience, the same reference numeral (reference numeral 21) is used to describe each pull tab portion.

[0014] The top substrate 11 and the printing substrate 12 are bonded with a laminating adhesive (OH-terminated polyurethane resin, polyester resin, etc.) 15. The printing substrate 12 and the shape-retaining substrate 13 are bonded with a laminating adhesive (OH-terminated polyurethane resin, polyester resin, etc.) 16. The shape-retaining substrate 13 and the adhesive substrate 14 are bonded with a laminating adhesive (OH-terminated polyurethane resin, polyester resin, etc.) 17.

[0015] [Adhesive base material] The adhesive base material 14 has a shape roughly the same as the shape of the opening of the container body 10, and a pull tab portion 21 is formed on a part of the outer periphery so as to protrude from the flange 27. The adhesive base material 14 has a sealant film layer, and is heat sealed (heat fused) in an area corresponding to the flange 27. As the sealant film layer, for example, a film of a polyolefin resin such as linear low density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE), or non-oriented polypropylene (CPP) having excellent heat sealability, or an ethylene copolymer resin such as ethylene / vinyl acetate copolymer (EVA), ethylene / acrylic acid copolymer (EAA), or ethylene / methacrylic acid copolymer (EMAA) is suitably used.

[0016] [Shape-retaining base material] The shape-retaining substrate 13 has roughly the same shape as the adhesive substrate 14, and a pull tab portion 21 is formed on a part of the outer periphery so as to protrude from the flange 27. The shape-retaining substrate 13 is laminated to the adhesive substrate 14 and is intended to suppress the occurrence of twisting and wrinkling in the container lid material 1 and improve the shape retention of the container lid material 1. Therefore, it is preferable to use paper with excellent shape retention for the shape-retaining substrate 13, but a film with excellent shape retention may also be used.

[0017] [Printing base material] The printing substrate 12 has a shape generally identical to that of the shape-retaining substrate 13, and a pull-tab portion 21 is formed on a part of the outer periphery so as to protrude from the flange 27. The printing substrate 12 is laminated on the shape-retaining substrate 13, and is configured by laminating an ink layer 33, a film layer 32, and a coating layer 31 in this order from the bottom. The coating layer 31 is formed on the upper surface side of the film layer 32 in the hatched areas in FIG. 4, i.e., the first peeling area, the area near the outer periphery, and the pull-tab portion 21 (the area protruding from the periphery), and is made of a coating agent for increasing the adhesive strength with the top substrate 11. The areas other than the first peeling area, the area near the outer periphery, and the pull-tab portion 21 (the area not hatched in FIG. 4) are designated as the printing area 25.

[0018] The coating agent constituting the coating agent layer 31 may be, for example, one containing methylcyclohexane as a main component, but is not limited thereto. The film layer 32 is a transparent film treated on one side (rear side), and its material is preferably, but is not limited to, biaxially oriented polypropylene (OP) or polyethylene terephthalate (PET) having printability. The ink layer 33 is formed on the rear side of the film layer 32, and is used for printing a design. For the ink layer, for example, an ink with a polyamide resin as the main binder or an ink with a polyurethane resin as the main binder is used. A laminating adhesive 16 is provided on the rear side of the ink layer 33, and the ink layer 33 is laminated on the shape-retaining substrate 13 via the laminating adhesive 16.

[0019] [Top substrate] The top substrate 11 has a shape substantially the same as that of the substrate 12 for printing, and a pull tab portion 21 is formed on a part of the outer periphery so as to protrude from the flange 27. The top substrate 11 also has a peeling portion (peeling area) 18 (described later) formed from the ends 22a, 22b of the base 22 of the pull tab portion 21 toward the opposing outer periphery so as to include a hole corresponding to the second half cut 6 (described later). The film used for the top substrate 11 is transparent, and is laminated on the substrate 12 for printing via a lamination adhesive 15. The thickness of the film is 12 to 100 μm, and examples of the material of the film include, but are not limited to, polyolefin films such as polyethylene film and polypropylene film, and polyester films.

[0020] [Half-cut structure] A first half cut (first cutting line) 8 is made inside the outer periphery of the flange 27 and from the back surface of the adhesive substrate 14 to a degree that does not reach the surface of the printing substrate 12, and a first peeling region 24 partitioned into a hole shape (circular in the example of FIG. 3) is formed. The reason for cutting to a degree that does not reach the surface of the printing substrate 12 is that if the surface of the printing substrate 12 is reached, the first peeling region 24 may not be cut off and may remain when peeled. The insertion hole 41 (see FIG. 6(c)) is an opening hole for inserting a straw 40 (see FIG. 6) for sucking up the contents in the container body 10 after peeling off the second peeling region 18 (see FIG. 2: a region that constitutes the peeling site, hereinafter sometimes referred to as the peeling site 18).

[0021] A second half cut (second cutting line) 6 is made inside the outer circumferential edge of the flange 27 and from the front surface of the top substrate 11 to a degree not reaching the back surface, forming a second peel region 18 defined in a tongue shape (see FIG. 3). The reason for cutting to a degree not reaching the back surface of the top substrate 11 is that if the top substrate 11 is cut to the back surface of the top substrate 11, there is a risk that the printing substrate will also be cut off during peeling. The second peel region 18 defined by the second half cut is a region extending from the ends 22a, 22b of the base 22 of the pull-tab portion 21 toward the opposing outer circumferential edge to include the insertion hole 41.

[0022] A third half cut (third cutting line) 7 is made along the line segment connecting base end 22a to base end 22b of pull tab portion 21, and from the rear surface of adhesive substrate 14 to a point not reaching the front surface of printing substrate 12 (see FIG. 5). By making this third half cut 7, when pull tab portion 21 is pinched and pulled up, second peel region 18 is peeled off together with pull tab portion 21. The first half cut 8, second half cut 6, and third half cut 7 can be made by a well-known method such as laser cutting or a blade.

[0023] (How to use) Fig. 6(a) is a diagram showing a state in which a container with a container lid member 1 attached to a container body 10 and a straw 40 are prepared. Fig. 6(b) is a diagram showing how a user picks up and pulls up the pull-tab portion 21, causing the peeling portion 18 to peel off from the top substrate 11. Fig. 6(c) is a diagram showing how the straw 40 is inserted into the insertion hole 41 exposed after the peeling portion 18 is cut off.

[0024] First, a user prepares a container with a container lid member 1 attached to a container body 10 and a straw 40 (see FIG. 6(a)). Next, as shown in FIG. 6(b), the user picks up the pull-tab portion 21 and pulls it up. Then, the intended peeling portion 18 extending from the pull-tab portion 21 is peeled off (cut off) from the top base material 11, and for example, as shown in FIG. 6(c), the intended peeling portion 18 is easily and reliably cut off along the second half cut (second cutting line) 6, and an insertion hole 41 is formed in the top base material 11 from which the intended peeling portion 18 has been peeled off.

[0025] That is, when the portion to be peeled 18 having the second peel region is cut along the second half cut, the portion to be peeled 18 having the second peel region is peeled off together with the circular portion having the first peel region (circular region) 24, and the surface of the printing substrate 12 on which the insertion hole 41 is formed is exposed. That is, the insertion hole 41 appears on the exposed surface of the printing substrate 12 (see FIG. 6(c)). Thereafter, by inserting a straw 40 into the insertion hole 41, it becomes possible to aspirate or take out the contents contained in the container body 10.

[0026] In this way, the top substrate 11 including the intended peeling portion 18 is laminated on the container lid 1 of the container until immediately before use, so the vicinity of the insertion hole 41 is clean immediately after peeling off the intended peeling portion 18. Therefore, according to the container lid 1, it is possible to prevent dust and foreign matter adhering to the surface of the container lid 1 from entering the inside of the container when a straw is inserted, thereby improving hygiene.

[0027] Furthermore, since the container lid member 1 does not have an outer lid, the cost of the outer lid can be reduced.

[0028] In addition, a coating layer 31 is laminated on the surface side of the film layer 32 in order to increase the adhesive strength in areas other than the intended peeling area 18 where the adhesive strength is weak, so that peeling of areas other than the intended peeling area 18 can be suppressed when the intended peeling area 18 is peeled off. [Explanation of symbols]

[0029] 1 Container lid material 6 Second half cut (second cutting line) 7 Third half cut (third cutting line) 8 First half cut (first cutting line) 10 Container body 11 Top substrate 12 Printing base material 13 Shape-retaining base material 14 Adhesive base material 15, 16, 17 Laminating adhesives 18 Second dissection area (area to be dissected) 21 Pull tab 22 Base 22a,22b end 24 First peeling region 25 Printing Area 27 Flange 31 Coating layer 32 Film Layer 33 Ink layer 40 Straw 41 Insertion hole

Claims

1. The container has a bottom layer substrate including at least an adhesive substrate, the bottom layer substrate having a back surface sealed to a flange portion of a container body, and a top substrate laminated to a printing substrate via an adhesive, the top substrate having a pull tab portion formed on a part of the outer periphery so as to protrude from the flange portion, A first half cut having a hole shape for sucking or removing the contents in the container body is provided inside the outer circumferential edge of the flange portion and from the back surface of the lower layer substrate to an extent not reaching the surface of the printing substrate, A second half cut is provided inside the outer circumferential edge of the flange portion and extending from the front surface of the top base material to a position not reaching the back surface of the top base material, a third half cut is provided on a line segment connecting one end of the base portion of the pull tab portion to the other end of the base portion of the pull tab portion, and extending from the rear surface of the lower layer substrate to a position not reaching the front surface of the printing substrate; a peeling portion extends from each of the base ends of the pull tab portion toward the opposing outer circumferential edges so as to include a hole corresponding to the second half cut; A container lid material characterized by the above.

2. The lower layer base material is configured to have an adhesive base material for sealing the back surface to the flange portion of the container body, and a shape-retaining base material for retaining the shape of a lid laminated on the adhesive base material via an adhesive. The container lid material according to claim 1 .

3. The printing substrate is configured to include a film layer and a coating material layer, and the material of the coating material layer is a coating agent for increasing the adhesive strength of at least an area of ​​the film layer excluding an area corresponding to the intended peeling portion.

3. The container lid material according to claim 1 or 2.

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