JP2605758Y2 - Liquid paper container with spout - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid paper container having a drinking portion covered with an opening sheet on a lid portion and an innermost layer made of a polyester resin.

[0002]

2. Description of the Related Art In recent years, a lid member having a drinking opening covered with an opening sheet, a body member made of a paper layer as a base material, and a bottom member are joined by heat fusion, for example, as shown in FIG. The liquid paper container as shown in (1) is easy to use and easy to dispose after use.
It is widely used in the field of liquid foods such as fruit juice drinks, coffee, liquid soups, and lactic acid drinks. In this liquid paper container, the innermost layer is a polyethylene layer, and the shape is as shown in FIG.
It was a cylindrical shape, a rectangular tube shape and a cup shape shown in (b). Then, as shown in FIG. 4, for example, the structure of the mouth portion of the lid member is such that the mouth portion (40) of the lid member (400) is provided.
5) is covered from the outside with an opening sheet (410), and an ethylene-vinyl acetate copolymer-based thermo-adhesive resin layer (413) on the lower surface of the opening sheet and polychlorinated on the outer peripheral edge of the upper surface of the mouth portion of the lid member. The contact surface with the vinyl layer (401) is heat-sealed except for a part of the unopened portion of the opening start portion (414), and the ethylene-vinyl acetate copolymer-based thermal bonding on the lower surface of the inner opening sheet. Polyethylene layer (40) covering the conductive resin layer (413) and the spout (405) of the lid member.
4) was heat-sealed at the contact surface.

[0003]

However, the liquid paper container using polyethylene for the innermost layer has a problem that, depending on the contents, a low molecular weight polyethylene component is eluted into the contents and the polyethylene odor is transferred, or vice versa,
There was a problem that the active ingredient of the contents was adsorbed, for example, limonene (C ₁₀ H ₁₆ ), which is an aroma component of juice. For this reason, in recent years, polyester-based resins that do not cause a change in the smell or taste of the contents have been used for food packaging containers. However, the conventional sheet for opening the bottom of the ethylene-vinyl acetate copolymer-based heat-adhesive resin layer is provided at the mouth of the lid member of the liquid paper container using the polyester resin as the innermost layer. Because the polyester resin of the inner layer and the ethylene-vinyl acetate copolymer-based heat-adhesive resin layer on the lower surface of the lid member do not thermally fuse,
The conventional structure could not be used. The present invention provides a liquid paper container which uses a polyester resin for the innermost layer and has a conventional mouthpiece with a sheet for opening on a lid.

[0004]

According to the present invention, as shown in FIG. 5 (a), a lid member (100) having a spout (107) with a polyester-based thermo-adhesive resin layer on the lower surface, and a paper layer. (1) The innermost layer is a polyester resin and the innermost layer is a polyester resin.
0) and a bottom member (20) whose upper surface is made of a polyester-based thermo-adhesive resin layer, which is thermally fused and bonded to the inner surface of a liquid paper container (1) made of a polyester-based resin.
As shown in, the lid member (100) of the spout (10
7) Polyester thermoplastic resin layer on top, inside
(121), having a polyethylene layer (123) on the lower surface
Adhesion with a hole of the same size as the spout in the laminated material
Through the sheet (120), the upper surface is a polyethylene layer
(131), epoxy resin layer (133) provided on the lower surface
Sealing sheet made of laminated material of aluminum foil (132)
(130) is heat-sealed and the outside of the lid member is
The aluminum foil (111) / polyethylene layer (11
2) / Ethylene-vinyl acetate copolymer thermal adhesive resin layer
Opening sheet (110) made of (113) is thermally bonded.
And heat-sealing the opening sheet releasably to the outer surface of the lid member.
And heat-sealed with the sealing sheet at the spout.
5 (a) and 5 (b), which are
1 is a liquid paper container (1) having a drinking mouth portion shown in FIG.

[0005] The above-mentioned polyester-based thermo-adhesive resin is a resin blended so that the surfaces of the formed similar resins are easily heat-sealed by a heat treatment such as a heat sealing method.

Further, the sealing sheet for sealing the spout of the lid member from the inside of the container is formed by heat-sealing the sealing sheet of the spout of the polyester-based thermo-adhesive resin layer on the lower surface of the laminated material of the lid member. In the attachment portion, the upper surface has a resin layer that is heat-sealed with the polyester-based thermo-adhesive resin, and the lower surface has an adhesive sheet layer that has the resin layer that is heat-sealed with the upper surface of the sealing sheet. The lamination material is punched out of the spout together with the formed adhesive sheet layer, and then the sealing sheet is heat-fused to the lower surface of the adhesive sheet layer to cover the spout.

[0007] If necessary, the contact surface between the lower surface of the opening sheet and the outer peripheral edge of the spout portion of the lid member is partially unbonded, and the opening sheet is provided with an opening start portion. Is also good.

[0008] The heat fusing force of the contact surface between the lower surface of the opening sheet and the outer peripheral edge of the mouth portion of the lid member is such that the opening sheet can be peeled at the time of use.
Between the lower surface of the opening sheet and the outer peripheral edge of the upper surface of the spout of the lid member, a resin layer for adjusting the heat fusing force such as a polyester lacquer may be provided. Further, the heat fusing force of the contact surface between the lower surface of the opening sheet and the upper surface of the sealing sheet covering the mouth of the lid member is such that when the opening sheet is peeled off during use, the opening sheet of the sealing sheet is removed. In this case, a sufficient heat-sealing force is required to break the outer peripheral edge of the heat-sealed portion to open the drinking spout.

[0009]

[Function] In the liquid paper container with a spout according to the present invention,
Since the polyester resin layer on the lower surface of the laminated material of the lid member and the resin layer on the upper surface of the bonding sheet are the same type of resin layer or a heat-fusible resin layer, they are heat-sealed, and the resin on the lower surface of the bonding sheet is Since the layer and the resin layer on the upper surface of the sealing sheet are the same type of resin layer or a heat-fusible resin layer, they are heat-fused, and the mouth of the lid member can be covered from below with the sealing sheet. . When the spout portion of the lid member is covered with the opening sheet and heat-sealed, the resin layer on the lower surface of the opening sheet and the resin layer on the outer peripheral edge of the upper surface of the spout portion of the lid member are selected according to the resin used. The resin layer on the lower surface of the opening sheet in the spout and the resin layer on the upper surface of the sealing sheet covering the spout are made of the same resin layer or heat-fusible resin. It is a layer and is firmly fused by heat and integrated. When the opening sheet peels off during use, the polyethylene layer / aluminum foil / epoxy
The sealing sheet on the outer peripheral edge of the heat-sealed portion of the sealing sheet and the opening sheet made of the xy-resin layer is broken, and the drinking opening is opened.

Further, since the innermost layers of the lid, the body and the bottom of the container forming the liquid paper container of the present invention are formed of a polyester resin, the filled contents are not affected by odor or taste over time. The influence of the container is extremely small.

[0011]

<Example 1> First, a lid member (10) having a mouthpiece (107) shown in FIG.
0), the [upper] polyvinyl chloride layer (1
01) (thickness 200 μm) / aluminum foil layer (10
2) A dry lamination method and an extrusion lamination method using a laminated material of (30 μm) / ethylene-methacrylic acid copolymer layer (103) (20 μm) / polyester thermal adhesive resin layer (104) (40 μm) [bottom] The upper side of the polyester-based thermo-adhesive resin layer (12) is formed on the heat-sealed portion of the sealing sheet (130) on the polyester-based thermo-adhesive resin layer surface (104) of the laminated material.
1) (30 μm) / stretched polyethylene terephthalate film layer (122) (12 μm) / polyethylene layer (1
23) Adhesive sheet (12 μm) [lower] configuration (12
0) The surface of the polyester-based heat-adhesive resin layer (121) is heat-sealed and bonded, and the spout (107) at a predetermined position is punched to the bonding sheet bonding portion of the laminated material.
Was formed. Next, on the polyethylene layer (123) surface of the adhesive sheet on the lower side of the laminated material having the drinking spout,
[Upper] polyethylene layer (131) (25 μm) / aluminum foil (132) (30 μm) / epoxy resin layer (133) (2 μm) [lower] sealing sheet (1)
The surface of the polyethylene layer (131) of 30) was heat-sealed and the drinking opening was covered with a sealing sheet. Further, the drinking mouth part is set from the upper surface of the laminated material to the upper side of the aluminum foil layer (111)
(50 μm) / polyethylene layer (112) (40 μm)
/ Ethylene-vinyl acetate copolymer heat-adhesive resin layer (1
13) Opening sheet (11 μm) (lower side)
0), and an ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (113) on the lower surface of the opening sheet and a polyvinyl chloride layer (10) on the outer peripheral edge of the upper surface of the mouth of the laminated material.
The contact surface with 1) is heat-sealed except for the opening start portion (114), and the ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (113) on the lower surface of the opening sheet and the mouthpiece of the laminated material. The contact surface of the upper surface of the sealing sheet covering the portion with the polyethylene layer (131) was heat-sealed. Then, a laminated material in which the mouth portion was covered with an opening sheet was punched to produce a cover member (100) with a mouth portion having a predetermined shape.

[0012] The above-mentioned lid member with a drinking mouth part and the [outside] polyethylene layer (15 µm) / paper layer (280 g /
m ² ) / polyethylene layer (15 μm) / aluminum foil (9 μm) / ethylene-methacrylic acid copolymer layer (20
μm) / polyester-based adhesive resin layer (20 μm) [inside] Body member made of laminated material and [upper] polyester-based adhesive resin (40 μm) / ethylene-methacrylic acid copolymer layer (20 μm) / aluminum Foil layer (30
μm) / polyvinyl chloride layer (200 μm) [Bottom] The inner surface layer joined by heat fusion with a bottom member made of a laminated material having a constitution is a polyester resin, and 200 ml of this embodiment filled with juice aseptically. A liquid paper container with a spout was prepared.

[0013] The liquid paper container with a spout portion of this embodiment containing the juice is stored at room temperature for 6 months at room temperature.
The opening sheet was peeled off to open the drinking mouth, and the change in the quality of the juice of the contents was examined. According to this result, the opening state of the mouth opening portion by the opening sheet is good, the odor of the innermost polyester-based adhesive resin is transferred to the juice, and limonene of the juice is transferred to the innermost polyester-based adhesive resin. There was no adsorption.

<Embodiment 2> First, a lid member (20) with a spout (207) shown in FIG.
In order to prepare 0), [upper] polyester protective varnish layer (201) (coating amount: 5 g / m ² ) / aluminum foil layer (202) (thickness: 80 μm) / ethylene-methacrylic acid copolymer layer (203) (Thickness: 20 μm) / Laminated material having a polyester-based thermal adhesive resin layer (204) (40 μm) [bottom]: A gravure printing method, a dry lamination method, and an extrusion lamination method are used, and a polyester-based thermal bonding of the laminated material is performed. Resin layer surface (2
04) on the heat-sealed portion of the sealing sheet (130), [upper] polyester-based heat-adhesive resin layer (221) (30 μm) /
Stretched polyethylene terephthalate film layer (222)
(12 μm) / polyethylene layer (223) (30 μm)
[Lower side] The surface of the polyester-based heat-adhesive resin layer (221) of the bonding sheet (220) having the structure is bonded by heat fusion to the bonding sheet bonding portion of the laminated material. A mouthpiece (207) was formed. Next, [upper] polyethylene layer (231) (25 μm) / aluminum foil (232) is placed on the polyethylene layer (223) surface of the adhesive sheet below the laminated material having the drinking spout.
(30 μm) / Epoxy resin layer (233) (2 μm)
[Lower side] The surface of the polyethylene layer (231) of the sealing sheet (230) having the above structure was heat-sealed to cover the drinking opening with the sealing sheet. Further, from the surface of the laminated material, the drinking mouth portion was set to [upper] aluminum foil layer (211) (50 μm) / polyethylene layer (212) (40 μm) / ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (213) (30 μm) )
[Lower side] Cover with an opening sheet (210) having a configuration, and an ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (213) on the lower surface of the opening sheet and the upper peripheral edge of the upper surface of the mouth of the laminated material. The contact surface with the polyester-based protective varnish layer (201) is heat-sealed leaving an opening start portion (214).
An ethylene-vinyl acetate copolymer-based thermo-adhesive resin layer (213) on the lower surface of the opening sheet and a polyethylene layer (231) on the upper surface of the sealing sheet covering the mouth of the laminated material.
Was heat-sealed. Then, a laminated material in which the spout was covered with an opening sheet was punched to produce a spout-shaped lid member (200) having a predetermined shape.

[0015] The above-mentioned lid member with a drinking mouth part and the [outside] polyethylene layer (15 µm) / paper layer (280 g /
m ² ) / polyethylene layer (15 μm) / aluminum foil (9 μm) / ethylene-methacrylic acid copolymer layer (20
μm) / Polyester adhesive resin layer (20 μm) Body member composed of laminated material having [inside] configuration, and [upper] polyester adhesive resin layer (40 μm) / ethylene-methacrylic acid copolymer layer (20 μm) / Aluminum foil layer (3
0 μm) / Polyester-based protective varnish layer (5 g / m ² )
[Lower side] A 200-ml liquid paper container with a spout of this example was prepared in which the inner surface layer formed by heat-sealing and bonding the bottom member made of the laminated material having the structure described above was a polyester resin, and was aseptically filled with juice. .

After the prepared liquid paper container with a mouth portion containing juice of this embodiment is stored at room temperature for 6 months at room temperature in the same manner as in Example 1, the opening sheet is peeled off to open the mouth portion. The changes in the quality of the juice of the contents were examined. According to this result, the opening state of the mouth opening portion by the opening sheet is good, the odor of the innermost polyester-based adhesive resin is transferred to the juice, and limonene of the juice is transferred to the innermost polyester-based adhesive resin. There was no adsorption.

<Embodiment 3> First, a lid member (30) with a spout (307) shown in FIG.
0), the [upper] polyethylene layer (30
5) (thickness: 20 μm) / paper layer (301) (basis weight: 280 g)
/ m ² ) / ethylene-methacrylic acid copolymer layer (306)
(Thickness 20 μm) / aluminum foil layer (302) (thickness 30 μm) / ethylene-methacrylic acid copolymer layer (30
3) (thickness: 20 μm) / Laminated material of polyester-based thermal adhesive resin layer (304) (40 μm) [Lower side] A laminated material having a configuration of dry lamination and extrusion lamination was prepared, and the surface of the polyester-based thermal adhesive resin layer of the laminated material was produced. (Upper) polyester-based heat-adhesive resin layer (32)
1) (30 μm) / stretched polyethylene terephthalate film layer (322) (12 μm) / polyethylene layer (3
23) (30 μm) [lower] adhesive sheet (32
The surface of the polyester-based heat-adhesive resin layer (321) of (0) was heat-sealed and bonded, and a mouthpiece (307) at a predetermined position was formed by punching in the bonding sheet bonding portion of this laminated material. Next, on the polyethylene layer (323) surface of the adhesive sheet on the lower side of the laminated material having the drinking opening, [upper] polyethylene layer (331) (25 μm) / aluminum foil (332) (30 μm) / epoxy Resin layer (33
3) (2 μm) [Lower] Sealing Sheet (330)
The surface of the polyethylene layer (331) was heat-sealed and the mouthpiece was covered with a sealing sheet. Further, the drinking mouth part was set from the surface of the laminated material to the [upper] aluminum foil layer (311) (50 μm).
m) / polyethylene layer (312) (40 μm) / ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (313)
(30 μm) [Lower side] Cover with an opening sheet (310) having a configuration, and place the ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (313) on the lower surface of the opening sheet and the upper surface of the mouthpiece of the laminated material. The peripheral surface of the contact surface with the polyethylene layer (305) is heat-sealed leaving an opening start portion (314).
An ethylene-vinyl acetate copolymer-based heat-adhesive resin layer (313) on the lower surface of the opening sheet and a polyethylene layer (331) on the upper surface of the sealing sheet covering the mouth of the laminated material.
Was heat-sealed. Then, a laminated material in which the mouth portion was covered with the opening sheet was punched to produce a mouth member-equipped lid member (300) having a predetermined shape.

[0018] The above-mentioned lid member with a drinking mouth part and the [outside] polyethylene layer (15 µm) / paper layer (280 g /
m ² ) / polyethylene layer (15 μm) / aluminum foil (9 μm) / ethylene-methacrylic acid copolymer layer (20
μm) / Polyester adhesive resin layer (20 μm) Body member composed of laminated material having [inside] configuration, and [upper] polyester adhesive resin layer (40 μm) / ethylene-methacrylic acid copolymer layer (20 μm) / Aluminum foil layer (3
0 μm) / ethylene-methacrylic acid copolymer layer (20 μm)
m) / paper layer (280 g / m ² ) / polyethylene layer (20 μm)
m) 200 ml of liquid paper container with a spout according to the present embodiment, in which the inner surface layer formed by heat-sealing and joining the bottom member made of the laminated material having the [lower] configuration is a polyester resin and the juice is aseptically filled. Was prepared.

After the prepared liquid paper container with a mouth portion containing juice according to the present embodiment is stored at room temperature for 6 months at room temperature in the same manner as in Example 1, the opening sheet is peeled off to open the mouth portion. The changes in the quality of the juice of the contents were examined. According to this result, the opening state of the mouth opening portion by the opening sheet is good, the odor of the innermost polyester-based adhesive resin is transferred to the juice, and limonene of the juice is transferred to the innermost polyester-based adhesive resin. There was no adsorption.

[0020]

According to the present invention, even if the innermost layer is a liquid paper container using a polyester resin, it is possible to provide a liquid paper container having a spout with an opening sheet in the lid. This liquid paper container can be easily peeled off from the opening of the opening sheet of the lid, the mouth opening is opened at the same time as the separation of the opening sheet, and the innermost layer is compared with the conventional liquid paper container of polyethylene. In addition, it has excellent storability against the smell and taste of the contents during distribution and storage.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of the vicinity of a mouth portion of a lid member according to a first embodiment.

FIG. 2 is a cross-sectional view of the vicinity of a mouth portion of a lid member according to a second embodiment.

FIG. 3 is a cross-sectional view of the vicinity of a mouth portion of a lid member according to a third embodiment.

FIG. 4 is a cross-sectional view of the vicinity of a mouth portion of a conventional lid member.

FIG. 5A is an explanatory view showing a configuration of an example of a liquid paper container having a lid with a mouthpiece, and FIG. 5B is a perspective view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Liquid paper container 10 ... Body member 20 ... Bottom member 100, 200, 300, 400 ... Lid member 101, 401 ... Polyvinyl chloride layer 102, 111, 122, 132, 202, 211, 2
22,232,302,311,322,332,40
2,411 ... aluminum foil layers 103, 203, 303, 306, 403 ... ethylene-methacrylic acid copolymer layers 104, 121, 204, 221, 304, 321 ...
Polyester-based heat-adhesive resin layer 107, 207, 307, 405 Drinking mouth 110, 210, 310, 410 Opening sheet 113, 213, 313, 413 Heat-adhesive property of ethylene-vinyl acetate copolymer Resin layers 114, 214, 314, 414... Opening start parts 120, 220, 320... Adhesive sheets 112, 123, 131, 212, 223, 231, 3
05, 312, 323, 331, 404, 412 ...
Polyethylene layer 122: stretched polyethylene terephthalate film layer 130: sealing sheet 133, 233, 333: epoxy resin layer 201: polyester protective varnish layer 301: paper layer

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 4-74620 (JP, U) JP-A 60-193015 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) B65D 5/74 B32B 27/36

Claims (1)

(57) [Scope of request for utility model registration] 1. A lid member having a drinking portion with a polyester-based thermo-adhesive resin layer on the lower surface, a body member having a paper layer as a base material and an innermost layer of a polyester-based resin, and a polyester-based thermo-adhesive resin on an upper surface. A liquid paper container made of a polyester-based resin has an inner surface formed by heat-sealing and bonding a bottom member made of a layer, and a polyester paper on an upper surface inside a drinking part of the lid member.
Laminated with a polyethylene layer on the bottom surface
Material, having an opening the same size as the spout
Through a sheet, polyethylene layer on the upper surface, epoxy on the lower surface
Sealing made of laminated aluminum foil with resin layer
While the sheet is heat-sealed, the outside of the lid member is
Luminium foil / polyethylene layer / ethylene-vinyl acetate
Opening sheet made of copolymer-based heat-adhesive resin layer
And heat-sealing the opening sheet on the outer surface of the lid member so that it can be peeled off.
As well as heat sealing with the sealing sheet at the spout
Liquid having a spout characterized by being integrated by being integrated
Paper container .