JP2017197220A - Lid material and packaging container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lid material preventing foreign matters from entering inside when a straw is pierced through, to enhance hygienic property, without changing size of a packaging container, and the packaging container using the lid material.SOLUTION: A lid material for sealing an opening of a container body, comprises: an upper laminate sequentially laminated from an outer side; and a lower laminate. The upper laminate includes a polyethylene terephthalate layer as an outermost layer; and an anchor coat layer as an innermost layer. The lower laminate includes a polyolefin layer as an outermost layer facing the upper laminate; an aluminum layer as an intermediate layer; and a sealant layer as an outermost layer. The upper laminate and the lower laminate are adhered except for a specified area. Within an area overlapping the specified area in the upper laminate in a plane view, a detached area partitioned by a half-cut is provided.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a lid material and a packaging container.

  A plastic packaging container filled with a beverage such as juice or coffee and having an opening sealed with a sheet-like lid is known. In such a packaging container, it is possible to drink a beverage filled by piercing the lid with a straw.

  As disclosed in Patent Document 1, the cover material is provided with a gas barrier property by laminating a stretched plastic film such as polyethylene terephthalate (hereinafter referred to as PET), an aluminum foil, and a sealant in order from the outer side. The laminated body used is used.

  Moreover, in a packaging container provided with such a lid material, in order to prevent the lid material from being damaged or peeled off in the distribution process, as disclosed in Patent Document 2, In addition, a packaging container provided with a resin overcap is known.

JP 2008-080769A JP2012-001218A

  In the lid material disclosed in Patent Literature 1, when a user stabs a straw or the like, foreign matters such as dust adhering to the surface of the lid material in the product distribution process enter the inside of the packaging container through the opened holes. There was a fear. In addition, when using a lid with an ink layer formed on the surface and printed with product information etc., there is a risk that when the lid is pierced with a straw or the like, the ink layer is scraped off by the straw and enters the inside of the packaging container. there were. Furthermore, there was also a problem that the straw was difficult to pierce the lid material due to the high piercing strength of the PET layer.

  In addition, by using the overcap disclosed in Patent Document 2, foreign matter adhesion to the lid material surface can be prevented, but the packaging container becomes bulky, hindering workability in the distribution process, There was a possibility that transportation efficiency would decrease and increase environmental impact.

  The present invention has been made in view of such a problem, and a lid material that has improved hygiene by preventing foreign matter from entering the inside when the straw is pierced without changing the dimensions of the packaging container. It aims at providing the packaging container using.

  One aspect of the present invention for solving the above problems is a lid member that seals an opening of a container body, and the lid member is an upper laminate and a lower laminate that are sequentially laminated from the outside of the container body. The upper laminate is a polyethylene terephthalate layer, the innermost layer is an anchor coat layer, the lower laminate is an outermost layer facing the upper laminate is a polyolefin layer, and an intermediate layer is aluminum. And the innermost layer is a sealant layer, and the upper laminate and the lower laminate are bonded to each other except for a predetermined region, and are divided by a half cut in a region overlapping the predetermined region of the upper laminate in plan view. It is a lid | cover material which has the made peeling area | region.

  Moreover, the other situation of this invention is a packaging container provided with the container main body provided with opening, and said lid | cover material which covers opening of a container main body.

  According to the present invention, without changing the dimensions of the packaging container, it is possible to provide a lid that has improved hygiene by preventing foreign matter from entering the inside of the straw when pierced with a straw, and a packaging container using the same. it can.

The front view and top view of a packaging container using the cover which concerns on one Embodiment of this invention Sectional drawing which shows the laminated structure of the cover material which concerns on one Embodiment of this invention The perspective view which shows the use condition of the packaging container using the cover material which concerns on one Embodiment of this invention.

(Packaging container)
In FIG. 1, the front view and top view of the packaging container 100 provided with the cover material 101 which concern on embodiment of this invention are shown. In the following description, for convenience, the vertical direction when the packaging container 100 is set upright is defined as the vertical direction.

  The packaging container 100 includes a container main body 102 provided with an opening, and a lid member 101 that covers and seals the opening of the container main body. The container body 102 is formed of a resin such as polypropylene, has a cylindrical side peripheral wall whose outer diameter gradually decreases downward, and has a bottom at the lower end. An opening is provided at the upper end, and a flange-like flange portion extending from the upper end edge toward the outer peripheral direction is formed. A circular lid 101 is bonded to the flange portion of the container body 102 by heat sealing to seal the opening of the container body 102.

(Cover material)
FIG. 2 is a cross-sectional view illustrating a laminated structure of a laminated body used for the lid member 101. In the lid 101, an upper laminate 201 and a lower laminate 202 are laminated in order from the outside of the packaging container 100. In the upper laminate 201, a polyethylene terephthalate layer 203 (hereinafter referred to as a PET layer 203), an ink layer 204, and a first anchor coat layer 205 are laminated in order from the outside of the packaging container 100. The lower laminate 202 has a first polyolefin layer 206, an aluminum layer 207, a second anchor coat layer 208, and a second polyolefin layer in order from the outside of the packaging container 100, that is, the layer facing the upper laminate 201. 209 and a sealant layer 210 are laminated.

  As shown in the plan view of FIG. 1 and FIG. 2, the first anchor coat layer 205 has a non-adhesive region 211 where the anchor coat is not applied over a predetermined range. For this reason, the upper laminated body 201 and the lower laminated body 202 are not bonded in the non-bonded region 211, and are bonded in a region excluding the non-bonded region 211.

  In the lid 101, a peeling region 213 defined by a half cut 212 made of a scratched portion penetrating the PET layer 203 and the ink layer 204 of the upper laminate 201 is formed. As shown in the plan view of FIG. 1, the peeling region 213 is formed in a region overlapping the non-adhesive region 211 of the upper stacked body 201 in plan view. The half cut 212 can be formed by a known method such as laser cutting or a blade.

  The half cut 212 penetrates only the PET layer 203 and the ink layer 204 of the upper laminate 201 and is not formed in the aluminum layer 207 of the lower laminate 202 having a barrier property. For this reason, the cover material 101 can have the same barrier performance as the conventional one.

  Since the ink layer 204 is formed so as to face the first polyolefin layer 206, it is preferable to use an ink containing a polypropylene resin that is hardly compatible with the polyolefin for the ink layer 204.

  For the first polyolefin layer 206 and the second polyolefin layer 209, a low-density polyethylene resin (LDPE), a linear low-density polyethylene resin (LLDPE), or the like can be used. In particular, it is preferable to use LDPE for the first polyolefin layer 206 that may come into contact with the ink layer 204 in the non-adhesive region 211. LDPE has a high affinity with the anchor coating agent used for the first anchor coat layer 205 and a low affinity with the ink used for the ink layer 204. Therefore, by using LDPE for the polyolefin layer 206, the separation region 213 can be laminated so that it can be easily separated while bonding the upper laminate 201 and the lower laminate 202 with high strength. is there.

  For the sealant layer 210, high density polyethylene resin (HDPE), medium density polyethylene resin (MDPE), LDPE, LLDPE, or the like can be used.

  The first anchor coat layer 205 and the second anchor coat layer 208 can be formed by a known method such as a stripe (endless) coat. If registration accuracy is required for forming the half-cut 212 in the non-adhesive region 211, the anchor coating agent may be colored.

(how to use)
In FIG. 3, the perspective view which shows the use condition of the packaging container 100 is shown. The user of the packaging container 100 first peels the peeling region 213 of the lid material 101 along the half cut 212 to expose the lower laminate 202 (upper view in FIG. 3). Then, the straw 214 is pierced into the exposed lower laminated body 202, thereby enabling the contents stored in the container main body 102 to be taken out (lower diagram in FIG. 3).

  Thus, since the peeling area | region 213 is laminated | stacked on the non-adhesion area | region 211 of the packaging container 100 until just before use, the non-adhesion area | region 211 immediately after peeling the peeling area | region 213 is clean. Therefore, according to the packaging container 100, when a straw is stabbed, the foreign material adhering to the surface of the lid | cover material 101 can be prevented from entering the inside of the packaging container 100, and hygiene can be improved.

  In addition, since the ink layer 204 can be peeled together with the peeling region 213, it is possible to prevent the ink scraped off by the straw 215 from entering the inside of the packaging container 100.

  Furthermore, since the PET layer 203 having a high piercing strength can be peeled together with the peeling region 213, a straw can be easily pierced into the lid member 100.

(Modification)
The shape and formation position of the peeling region 213 and the non-adhesion region 211 are not limited to the shape and position shown in FIG. 1, and any shape such as a circle or a rectangle can be formed at any position on the surface of the lid 101. Alternatively, an adhesive label may be attached to the surface of the lid 101 including the peeling region 213 so that the user can peel the peeling region 213 by peeling the adhesive label.

  In the laminated structure of the lid 101, the outermost layer of the upper laminate 201 is a polyethylene terephthalate layer 203, the innermost layer is an anchor coat layer 205, and the outermost layer facing the upper laminate of the lower laminate 202 is a polyolefin layer 206. As long as the intermediate layer is the aluminum layer 207 and the innermost layer is the sealant layer 210, a layer of any material may be added according to the required function.

  The lid | cover material which concerns on an Example and a comparative example, and a packaging container provided with this were manufactured, and sensory evaluation was performed about the ease of sticking of a straw.

(Example)
Using a laminate of PET (12 μm) / ink / anchor coat / LDPE (15 μm) / aluminum (7 μm) / anchor coat / LDPE (15 μm) / multilayer polypropylene (30 μm) in order from the outside of the container body Material 101 was produced. As the ink, “Fine PPS R641 white (2 ± 0.5 g / m ² (dry))” manufactured by Toyo Ink was used. The anchor coat used was “T-125 / T-160 (1 ± 0.5 g / m ² (dry))” manufactured by Nippon Soda.

(Comparative example)
Using a laminate of PET (9 μm) / ink / adhesive (dry laminate) / aluminum (7 μm) / adhesive (dry laminate) / multilayer polypropylene (30 μm) in order from the outside of the container body, Produced. As the ink, “Fine PPS R641 white (2 ± 0.5 g / m ² (dry))” manufactured by Toyo Ink Co., Ltd. was used. The peeling region 213 was not formed on the lid material according to the comparative example.

  The produced lid was bonded to the opening of the polypropylene container body by heat sealing to produce a packaging container. For the evaluation, a straw having a diameter of 5 mm whose tip is tapered at an angle of 45 ° with respect to the length direction was used.

(Evaluation method)
Five subjects performed sensory evaluation in five stages (1 is the least hard to pierce and 5 is the most pierceable) with respect to the ease of piercing the straw into the lid of the packaging container according to the example and the comparative example. The lid material according to the example peeled the peeling region 213 immediately before piercing the straw, and pierced the exposed lower laminated body 202 with the straw. Moreover, the lid | cover material which concerns on a comparative example stabbed the straw in the PET layer of the lid | cover material surface. The evaluation results are shown in Table 1.

  As shown in Table 1, it was confirmed that the packaging container using the lid material according to the example was easily pierced as compared with the lid material according to the comparative example because the PET layer was peeled off in advance.

  As described above, according to the present invention, when a straw is pierced, foreign matter adhering to the surface of the lid 101 and the ink scraped off by the straw can be prevented from entering the packaging container 100. , Can enhance hygiene. In addition, it is possible to easily pierce the lid member 100 with a straw.

  INDUSTRIAL APPLICATION This invention is useful for the packaging container which accommodates a drink, and its cover material.

DESCRIPTION OF SYMBOLS 100 Packaging container 101 Cover material 102 Container main body 201 Upper laminated body 202 Lower laminated body 203 Polyethylene terephthalate layer (PET layer)
204 Ink layer 205 First anchor coat layer 206 First polyolefin layer 207 Aluminum layer 208 Second anchor coat layer 209 Second polyolefin layer 210 Sealant layer 211 Non-adhesive area 212 Half-cut 213 Peel area 214 Straw

Claims (4)

A lid that seals the opening of the container body,
The lid includes an upper laminate and a lower laminate that are sequentially laminated from the outside of the container body,
In the upper laminate, the outermost layer is a polyethylene terephthalate layer, the innermost layer is an anchor coat layer,
In the lower laminate, the outermost layer facing the upper laminate is a polyolefin layer, the intermediate layer is an aluminum layer, and the innermost layer is a sealant layer,
The upper laminate and the lower laminate are bonded except for a predetermined region,
A lid member having a peeled region partitioned by half-cut in a region overlapping the predetermined region of the upper laminate in plan view.   The lid according to claim 1, wherein the polyolefin layer is a low-density polyethylene layer.   The lid | cover material of Claim 1 or 2 which further contains the ink layer using the ink containing a polypropylene layer between the said polyethylene terephthalate layer of the said upper laminated body, and the said anchor coat layer. A container body provided with an opening;
A packaging container comprising: the lid according to any one of claims 1 to 3 that covers the opening of the container body.

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