JP7127342B2 - Lid material with hot water drain hole - Google Patents

Description

TECHNICAL FIELD The present invention relates to a lid member with a hot water drain hole for sealing a container body for storing instant fried noodles or the like.

Patent Document 1 discloses a packaging container for packaging contents such as instant fried noodles and instant spaghetti. This packaging container includes a container body made of a resin molded product and a lid material for sealing the container body. The container body is formed in a bottomed cylindrical shape having an opening on the upper surface, and a flange is formed around the opening.

The lid member has an opening tab and a hot water draining tab that protrude outward and are arranged opposite to each other, and the upper layer portion and the lower layer portion are laminated such that they can be peeled off. A hot water drain hole is formed in the lower surface of the lid member by half-cutting a closed curve penetrating through the lower layer.

The upper layer portion of the lid member has a paper layer and a release layer disposed on the lower surface of the paper layer. The release layer is formed by applying a release varnish to the area of the paper layer excluding the hot water drain hole through a sealing varnish.

In the packaging container configured as described above, the opening tab is pulled to peel off a portion of the lid material from the flange, thereby opening the pouring port. When hot water is poured into the container body through the pouring port, the lid member is closed and the contents are steamed and cooked.

After a predetermined time has passed and cooking is completed, the hot water draining tab is pulled to partially peel off the upper layer portion of the lid material between the peeling layer and the lower layer portion and fold it back. At this time, since the lower layer in the hot water drain hole is adhered to the upper layer, a plurality of hot water drain holes are opened, and hot water is drained through the hot water drain holes. After that, the entire lid member can be peeled off from the flange and the contents in the container body can be eaten.

Japanese Patent Application Laid-Open No. 2016-22982 (pages 3 to 6, FIG. 7)

However, according to the above-described conventional cover member, the upper layer part peeled off and folded back from the lower layer part overlaps the lower layer part due to the repulsion of the paper layer, which is inconvenient when draining hot water.

SUMMARY OF THE INVENTION An object of the present invention is to provide a lid member with a hot water drain hole that can improve the convenience of hot water draining.

In order to achieve the above object, the present invention provides an upper layer part in which a release layer formed of release varnish is provided on a paper layer, and a lower layer part having a heat-adhesive resin layer on the lower surface, which are separated from the release layer. In the lid material with hot water drain holes, a plurality of hot water drain holes are formed by half-cut cutting lines penetrating the lower layer from the lower surface, wherein the peeling layer is outside each of the hot water drain holes. is arranged in a predetermined peelable region surrounding the hot water drain hole, and the peelable region includes a mixture of the peelable layer and a non-formed portion where the peelable layer is not formed.

According to this structure, the lid member with the hot water drain hole is thermally adhered to the container body by the heat-adhesive resin layer, and when a part of the lid member is peeled off from the container body, the pouring port is opened. After pouring molten metal from the pouring port, the pouring port is closed by a cover member with a hot water drain hole. At this time, the steam of the hot water permeates the paper layer through the cutting line, spreads between the release layer and the lower layer from the cutting line, and permeates the paper layer from above the edge of the release layer.

After a predetermined period of time has passed, the upper layer part of the cover member with the hot water drain hole is peeled off from the lower layer part and folded back. The lower layer inside the cutting line is removed together with the upper layer, and a hot water drain hole is opened on the lower layer. Since the upper layer is heavy due to condensation of steam that has permeated the paper layer, the folded state is maintained, and the hot water is drained through the hot water drain hole.

Further, according to the present invention, in the lid member with a hot water drain hole having the above structure, the non-formation portion occupies 5% to 40% of the peelable region per unit area.

Further, according to the present invention, in the lid member with hot water drain holes having the above structure, the paper layer on the inner side of each of the hot water drain holes is composed of the non-formed portion.

Further, according to the present invention, there is provided a lid material with a hot water draining hole having the above structure, wherein the hot water draining tab protruding from the outer periphery is formed in an arch shape with the top portion directed toward the hot water draining tab side by the cutting line, and the open end is aligned in a straight line. and a plurality of regulating portions arranged in the hot water draining tab and the regulating portion, and the hot water draining hole is arranged between the hot water draining tab and the regulating portion, and the peelable region is on the hot water draining tab side with respect to the regulating portion. is disposed, and the paper layer on the inner side of the restricting portion is composed of the non-formed portion.

Further, according to the present invention, in the lid member with a hot water drain hole having the above structure, the distance between the restricting portion and the hot water drain hole is set to 10 mm or more.

Further, according to the present invention, in the lid member with a hot water drain hole having the above configuration, the lower layer portion has an extruded resin layer adjacent to the release layer, and an anchor coating agent is disposed on the paper layer of the non-formed portion. Characterized by

According to the present invention, since the peelable region where the peelable layer is arranged has a mixture of the peelable layer and the non-formed portion, steam passing through the cutting line permeates the paper layer from the edge of the peelable layer. The upper layer becomes heavy due to condensation of the steam that has permeated the paper layer, and can easily maintain the state in which it is separated from the lower layer and folded back. Therefore, it is possible to improve the convenience when draining the hot water.

The perspective view which shows the packaging container of embodiment of this invention. 1 is a vertical cross-sectional view showing a packaging container according to an embodiment of the present invention; The top view which shows the packaging container of embodiment of this invention. FIG. 2 is a cross-sectional view showing the layer structure of the lid member with the hot water drain hole of the packaging container according to the embodiment of the present invention. FIG. 2 is an enlarged plan view of the lower surface of the paper layer in the detachable region of the lid member with the hot water drain hole of the packaging container according to the embodiment of the present invention. FIG. 2 is a perspective view showing a state in which the lid member with the hot water drain hole of the packaging container according to the embodiment of the present invention is peeled off; FIG. 2 is a perspective view showing the state of the packaging container according to the embodiment of the present invention when hot water is drained.

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a perspective view and a longitudinal sectional view of a packaging container 1 of one embodiment. The packaging container 1 includes a container body 10 and a lid member 20 with a hot water drain hole (hereinafter referred to as "cover member 20"). Contents such as instant fried noodles, instant spaghetti, etc. to be drained after pouring hot water are stored in the container body 10.例文帳に追加

The container body 10 is made of a resin molded product such as foamed polystyrene resin, and is formed into a bottomed cylindrical shape having a circular opening 11 on the upper surface. An annular flange 12 extending horizontally from the periphery of the opening 11 is provided on the periphery of the upper surface of the container body 10 .

The cover member 20 includes an upper layer portion 30 and a lower layer portion 40 that are detachably laminated, and is thermally adhered onto the flange 12 by a thermal adhesive resin layer 43 (see FIG. 4) provided on the lower layer portion 40 . The lid member 20 is provided with an opening tab 21 and a hot water draining tab 22 projecting outward from the flange 12 .

FIG. 3 shows a top view of the packaging container 1. FIG. The opening tab 21 of the lid member 20 is provided at one place in the circumferential direction so as to protrude from the outer periphery. The hot water draining tab 22 is arranged to face the unsealing tab 21 and protrudes from the outer circumference at one point in the circumferential direction.

The lid member 20 is provided with cutting lines 25, 26, and 27 by half-cutting from the lower surface. The cutting line 26 is provided along the outer edge of the flange 12 so that the upper layer 30 is separated from the lower layer 40 when the lid member 20 is peeled off the hot water draining tab 22 .

The cutting line 25 is formed by a plurality of closed curves arranged inside the flange 12 and forms the hot water drain hole 24 when the upper layer 30 is peeled off from the hot water drain tab 22 .

The cutting line 27 is formed in an arch shape with the top directed toward the hot water draining tab 22, and the open end 27a is arranged in a straight line. A plurality of hot water drain holes 24 are arranged between the cutting line 27 and the hot water draining tab 22 , and the cutting line 27 forms a plurality of restricting portions 28 that restrict peeling of the upper layer portion 30 . Also, the distance L between the hot water drain hole 24 and the restricting portion 28 is formed to be 10 mm or more. In this embodiment, the restricting portion 28 is formed by the trapezoidal cutting line 27, but it may be V-shaped or U-shaped as long as it is arch-shaped with the opposite side of the hot water draining tab 22 open.

FIG. 4 is a cross-sectional view showing the layer structure of the lid member 20. As shown in FIG. The upper layer portion 30 of the lid member 20 is formed by laminating a print layer 33, a paper layer 34, and a release layer 35 in order from the upper surface. A non-formation portion 34 a on which the release layer 35 is not formed is provided at a predetermined position on the lower surface of the paper layer 34 . The lower layer portion 40 is formed by stacking an extruded resin layer 41, an aluminum foil layer 42, and a heat-adhesive resin layer 43 in this order from the upper surface.

Cutting lines 25 , 26 , and 27 cut from the lower surface of the lid member 20 pass through the lower layer 40 and have their upper ends inside the paper layer 34 .

The paper layer 34 is formed of single art paper, pure white roll paper, or the like. For example, as the paper layer 34, pure white roll paper with a basis weight of 79.1 g/m ² is used. If the basis weight of the paper layer 34 is less than 50 g/m ² , the thickness of the lid member 20 is too thin and the rigidity is insufficient, and half-cutting becomes difficult. If the basis weight of the paper layer 34 is more than 200 g/m ² , the rigidity of the lid member 20 becomes too high and the cost also increases. Therefore, the basis weight of the paper layer 34 is preferably in the range of 50 to 200 g/m ² .

The print layer 33 has a design or the like printed on the upper surface of the paper layer 34 with ink. The print layer 33 and the release layer 35 are formed by double-sided printing on the paper layer 34 by gravure printing or the like. Double-sided printing can prevent the relative positions of the print layer 33 and the release layer 35 from being shifted.

A protective layer made of a resin film such as polyethylene terephthalate, oriented nylon, or oriented polypropylene may be laminated on the paper layer 34 via an adhesive. The protective layer can protect the upper surface of the paper layer 34 including the printed layer 33 .

The release layer 35 is formed by printing release varnish on the lower surface of the paper layer 34 . As the release varnish, a resin-based varnish (for example, urethane-based, acrylic-based, nitrocellulose-based, polyamide-based, etc.) added with silicon, low-molecular-weight polyethylene wax, phosphate ester, or the like can be used.

A detachable region D (indicated by a dot pattern in FIG. 3 ) in which the upper layer portion 30 and the lower layer portion 40 can be detached by the detachment layer 35 is provided in a range surrounding the plurality of hot water drain holes 24 . In this embodiment, except for the inside of the hot water drain hole 24, the detachable region D is arranged on the hot water drain tab 22 side with respect to the regulation portion 28, and the non-formation portion 34a is arranged on the opposite side of the hot water drain tab 22. there is

Therefore, the paper layer 34 on the inside of the hot water drain hole 24 and the inside of the restricting portion 28 is formed by the non-forming portion 34a. That is, the peelable area D is the area surrounding the plurality of hot water drain holes 24 outside each hot water drain hole 24 . As will be described later, the peelable region D includes a mixture of the peeling layer 35 and the non-formation portion 34a.

The aluminum foil layer 42 of the lower layer portion 40 is made of, for example, an aluminum foil having a thickness of 15 μm, and imparts dead hold properties to the lid member 20 . As a result, the lid member 20 can maintain the lifted state when it is opened and the closed state when it is closed again. Instead of the aluminum foil layer 42, a layer made of a resin film having a deposited film of metal (aluminum, etc.) or oxide (aluminum oxide, silicon oxide, etc.) may be provided.

The heat-adhesive resin layer 43 is formed of an easy peel film containing an olefin resin or the like and having easy peeling properties. The heat-adhesive resin layer 43 is not particularly limited as long as it is an easy-peel film suitable for the container body 10. For example, a 30 μm-thick unstretched polypropylene film containing ethylene-vinyl acetate copolymer is used.

The aluminum foil layer 42 and the thermoadhesive resin layer 43 are laminated with an adhesive (not shown) such as EMAA and adhered to the upper layer portion 30 via the extruded resin layer 41 . The extruded resin layer 41 is made of extruded resin such as polyethylene. As a result, the non-formation portion 34a on the paper layer 34 is in contact with the extruded resin layer 41, so that the adhesion strength between the paper layer 34 and the lower layer portion 40 can be increased in the non-formation portion 34a.

In addition, an anchor coating agent may be placed on the paper layer 34 of the non-forming portion 34a. Thereby, the adhesive strength between the paper layer 34 of the non-formed portion 34a and the lower layer portion 40 can be further increased. Therefore, it is possible to reliably prevent the lower layer portion 40 inside the hot water drain hole 24 from dropping into the container body 10 .

FIG. 5 shows an enlarged plan view of the lower surface of the paper layer 34 (see FIG. 3) in the peelable area D. As shown in FIG. A large number of dot-shaped non-formation portions 34a are arranged in the peeling layer 35 by dot printing or the like in the peelable region D arranged outside the hot water drain hole 24 . As a result, the peelable region D includes a mixture of the peelable layer 35 and the non-formation portion 34a within a minute area.

Since the release layer 35 and the non-formed portion 34a are mixed in the release region D, steam permeates the paper layer 34 from the edge 35a (see FIG. 4) of the release layer 35 as described later. Moreover, the adhesive strength between the upper layer portion 30 and the lower layer portion 40 of the peelable region D can be increased, and peeling of the peelable region D during transportation can be prevented.

In this embodiment, the circular non-formation portions 34a are arranged in a square lattice with a period T in two orthogonal directions. Further, the center-to-center distance T' (=2 ^1/2 ·T) of the diagonal non-formation portions 34a is set to 1 mm, and the diameter of the non-formation portions 34a is set to 0.5 mm. As a result, the occupation ratio of the non-formation portion 34a per unit area of the peelable region D is about 39%.

If the non-formation portion 34a occupies less than 5% of the unit area of the detachable region D, the adhesive strength between the upper layer portion 30 and the lower layer portion 40 cannot be increased. Therefore, peeling of the peelable region D may occur during transportation. When the non-formation portion 34a occupies more than 40% per unit area of the peelable region D, a portion of the paper layer 34 remains on the lower layer portion 40 when the upper layer portion 30 is peeled off from the lower layer portion 40. Paper peeling occurs. For this reason, it is more preferable to set the non-formation portion 34a occupancy rate per unit area of the detachable region D to 5% to 40%.

A large number of dot-like release layers 35 may be arranged in the non-formation portions 34a by dot printing or the like, or the release layers 35 and the non-formation portions 34a may be arranged in a checkered pattern. With these, the release layer 35 and the non-formation portion 34a can be mixed in a very small area in the same manner as described above.

In the packaging container 1 configured as described above, the lid member 20 is peeled off from the opening tab 21 to the flange 12 by the user as shown in FIG. As a result, the pouring port 11a, which is a part of the opening 11, is exposed.

Next, a packaging bag (not shown) for storing sauces, ingredients, etc., is taken out from the container main body 10 through the spout 11a as required. When ingredients and the like are put into the container body 10, hot water is poured into the container body 10 from the pouring port 11a, and the opening tab 21 is hung on the flange 12 to close the lid member 20 again. As a result, steam cooking of instant fried noodles or the like is performed while the lid member 20 is kept closed.

At this time, steam from the hot water in the container body 10 permeates the paper layer 34 through the cutting lines 25 and 27 . In addition, since the adhesive strength between the release layer 35 and the lower layer 40 is low, minute gaps are irregularly formed between the release layer 35 and the lower layer 40 when the half-cut cutting lines 25 and 27 are provided. be. Therefore, steam spreads from the cutting lines 25, 27 between the release layer 35 and the lower layer portion 40, and penetrates into the paper layer 34 from above the edge 35a (see FIG. 3) of the release layer 35 adjacent to the non-formed portion 34a. do. Since a large number of minute non-formation portions 34 a are formed in the peelable region D, a large amount of steam can permeate the paper layer 34 from above the edge 35 a of the peel layer 35 .

When the cooking is completed after a predetermined time has passed after pouring hot water, the hot water draining tab 22 is pulled by the user. As a result, the upper layer portion 30 is peeled off while the lower layer portion 40 is adhered to the flange 12 inside the cutting line 26 of the lid member 20 . Also, the lower layer portion 40 inside the cutting line 25 is removed together with the upper layer portion 30, and the hot water drain hole 24 is opened. When the user peels off the upper layer portion 30, the load on the open end 27a of the restricting portion 28 becomes large, so that the peeling can be stopped.

The upper layer portion 30 separated from the lower layer portion 40 is folded back on the open end 27a. The upper layer 30 is heavy due to condensation of steam that has permeated the paper layer 34 . Further, since the vapor permeates from the edge 35a of the release layer 35 to the lower part of the paper layer 34, the condensation of the vapor extends the lower part of the paper layer 34 and the upper layer 30 curls upward. As a result, the folded state of the upper layer portion 30 can be easily maintained.

In addition, since steam spreads from the cutting line 27 arranged at the portion where the upper layer portion 30 is folded back and permeates the paper layer 34, the repulsive force of the paper layer 34 near the open end 27a can be reduced. Therefore, the folded state of the upper layer portion 30 can be more easily maintained.

Then, as shown in FIG. 6, hot water is drained from the container body 10 through the hot water drain hole 24 . At this time, since the distance L between the restricting portion 28 and the hot water drain hole 24 is formed to be 10 mm or more, it is possible to prevent the contents from being discharged from the inside of the restricting portion 28 . When the hot water is drained, the entire lid member 20 is peeled off from the opening tab 21, and the sauce or the like can be put into the container body 10 and the contents can be eaten.

According to this embodiment, since the release layer 35 and the non-formed portion 34a coexist in the peelable region D where the release layer 35 is arranged, the steam passing along the cutting lines 25 and 27 passes from the edge 35a of the release layer 35 to the paper layer. Infiltrate 34. The upper layer part 30 becomes heavy due to condensation of the steam permeated into the paper layer 34, and can easily maintain the state of peeling and folding back from the lower layer part 40 when the hot water is drained. Therefore, it is possible to improve the convenience when draining the hot water. Moreover, since the adhesive strength between the upper layer portion 30 and the lower layer portion 40 of the peelable region D is increased, peeling of the peelable region D during transportation can be prevented.

In addition, since the occupancy rate of the non-formation portion per unit area of the peelable region is 5% to 40%, peeling of the peelable region D during transportation can be reliably prevented, and peeling of the upper layer portion 30 can be prevented. Paper peeling can be prevented.

In addition, since the top of the paper layer 34 inside each hot water drain hole 24 is composed of the non-formed part 34a, when the upper layer part 30 is peeled off, the lower layer part 40 inside the cutting line 25 is reliably removed, and the hot water drain hole 24 is removed. can be formed.

Further, a plurality of arch-shaped restricting portions 28 are provided with the tops directed toward the hot water draining tab 22 along the cutting line 27, and the open ends 27a of the restricting portions 28 are arranged in a straight line. The detachable region D is arranged on the hot water drain tab 22 side with respect to the restricting portion 28, and the top of the paper layer 34 inside the restricting portion 28 consists of a non-formed portion 34a. As a result, when the upper layer portion 30 is peeled off from the lower layer portion 40, the load on the open end 27a of the restricting portion 28 increases, so the peeling can be stopped and the upper layer portion 30 can be folded back. In addition, since the steam permeates the vicinity of the folded portion of the upper layer portion 30 via the cutting line 27 forming the restricting portion 28, the folded state of the upper layer portion 30 can be more easily maintained.

Further, since the distance L between the restricting portion 28 and the hot water drain hole 24 is set to 10 mm or more, it is possible to prevent the contents from flowing out from the inner side of the restricting portion 28 when the hot water is drained.

Further, when the lower layer portion 40 has the extruded resin layer 41 adjacent to the release layer 35 and the anchor coating agent is placed on the paper layer 34 of the non-formed portion 34a, the paper layer 34 of the non-formed portion 34a and the lower layer portion 40 are separated. can increase the adhesive strength of the Therefore, it is possible to prevent the lower layer portion 40 inside the hot water drain hole 24 from dropping into the container body 10 .

INDUSTRIAL APPLICABILITY According to the present invention, it can be used as a packaging container for draining hot water such as instant fried noodles.

1 packaging container 10 container body 11 opening 11a spout 12 flange 20 lid material 21 unsealing tab 22 hot water draining tab 24 hot water draining hole 25, 26, 27 cutting line 27a open end 28 regulation part 30 upper layer part 33 printing layer 34 paper layer 35 peel layer 35a edge 40 lower layer portion 41 extruded resin layer 42 aluminum foil layer 43 heat-adhesive resin layer D peelable region

Claims (5)

An upper layer portion in which a release layer formed by release varnish is provided on a paper layer, and a lower layer portion having a heat-adhesive resin layer on the lower surface are laminated so as to be releasable on the releasable region where the release layer is arranged, A lid material with hot water drain holes in which a plurality of hot water drain holes are formed by half-cut first cutting lines passing through the lower layer from the lower surface, wherein the hot water drain tab protrudes from the outer periphery and penetrates the lower layer from the lower surface. a plurality of restricting portions formed in an arch shape with the top portion facing the hot water draining tab side along the second cutting line of the half cut and having open ends arranged in a straight line;
The peelable region is outside each of the hot water drain holes and surrounds the plurality of hot water drain holes, and the peelable region includes the peelable region and a non-formed portion where the peelable layer is not formed ,
The hot water draining hole is arranged between the hot water draining tab and the regulation portion, and the peelable region is arranged on the hot water draining tab side with respect to the regulation portion, and the paper inside the regulation portion is disposed. A lid material with a hot water drain hole , wherein the upper layer is composed of the non-formed portion . 2. A lid material with a hot water drain hole according to claim 1, wherein the occupancy rate of said non-formed portion per unit area of said peelable region is 5% to 40%. 3. The lid material with hot water drain holes according to claim 1, wherein the paper layer on the inner side of each of the hot water drain holes is composed of the non-formed portion. 4. The lid material with a hot water drain hole according to any one of claims 1 to 3 , characterized in that the distance between the restricting portion and the hot water drain hole is 10 mm or more. 5. The lower layer portion has an extruded resin layer adjacent to the release layer, and an anchor coating agent is provided on the paper layer of the non - formed portion. A lid material with a hot water drain hole.

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