JP2568707Y2 - Liquid paper container spout stopper - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spout plug for a liquid paper container which has low permeation and adsorption of aroma components such as juices, seasonings and alcoholic beverages.

[0002]

2. Description of the Related Art Heretofore, a spout plug which is attached to a circular opening of a liquid paper container such as a gabled roof and has a polyolefin layer laminated on at least the inner side thereof, wherein a lid is screwed around the outer periphery of the upper part of the cylinder. A helical ridge to be fitted, a plug bottom provided with a tension ring and an opening thin line on the inner periphery of the lower end of the cylinder, and a circular shape for connecting a spout plug to the circular opening on the outer periphery of the lower end of the cylinder A cylindrical spout made of polyolefin having a flange portion is widely used, and heats the inner surface around the circular opening of the liquid paper container and the outer surface of the circular flange. It is used by being fused and easily attached to a circular opening of a liquid paper container.

[0003] Conventionally, a gabled roof having a polyolefin layer laminated on at least the inner surface thereof in order to prevent permeation of flavor components such as juices, seasonings and alcoholic beverages, which are the contents of a liquid paper container, and to improve the storage stability. For the liquid paper container such as a shape, a liquid paper container in which an aluminum foil layer or the like is laminated on an intermediate layer or the like on the inner surface side is used,
Further, for the polyolefin cylindrical spout plug, a disc-shaped laminate obtained by laminating an aluminum foil layer and the like on at least the outer surface side of a polyolefin layer and an intermediate layer, the bottom of the plug body and the circular flange portion A cylindrical spout plug (see Japanese Utility Model Application Laid-Open No. 61-103313), which is located on the inner surface side and heat-sealed with each other, is used.

[0004]

[Problem to be solved by the invention] With the recent diversification and upgrading of dietary habits, conventional flavor components such as juices, seasonings and alcoholic beverages, which are the contents of liquid paper containers, are prevented from permeating and stored. In addition to improving the odor properties, the problem is that the fragrance component is adsorbed on the polyolefin layer on the inner surface side of the liquid paper container, and instead of the polyolefin layer on the inner surface side, the permeability of the fragrance component on the inner surface side, A liquid paper container having a gabled roof shape or the like in which a polyester layer having a low adsorptivity is laminated has been developed.

On the other hand, in the case of the above-mentioned conventional polyolefin cylindrical spout plug, heat fusion is performed between the polyester layer on the inner surface side of the liquid paper container and the outer surface of the circular flange portion of the polyolefin cylindrical spout plug. It is difficult to attach and use the cylindrical outlet spout made of polyester, which is difficult to attach to the circular opening of the liquid paper container and is difficult to use because injection molding is difficult. In a method using an interposed member (see Japanese Utility Model Laid-Open No. 2-84222, corresponding to the ring plate-shaped laminate of the present invention) in which a layer and a polyester layer are laminated on the outer surface side, the circular opening of the liquid paper container is used. And a cylindrical spout plug is attached by heat fusion.

In this case, in particular, a method using an interposition member disclosed in Japanese Utility Model Laid-Open No. 2-28422 discloses a method in which a polyolefin layer is formed on the inner surface between the bottom of the plug body and the circular flange of the cylindrical spout made of polyolefin. Is exposed, and there is a problem that even a small amount of the aroma component of the contents of the liquid paper container is adsorbed to the exposed polyolefin layer.

[0007]

According to the present invention, a polyolefin cylindrical spout plug similar to the conventional one, and a ring plate-shaped laminate and a disk-shaped laminate described later are used in combination. 1 and 2, at least the polyester layer (4
A spout plug attached to a circular opening (42) of a liquid paper container (40) having a gabled roof shape or the like laminated with 1), and a cover (not shown) is screwed into the outer periphery of the upper part of the cylinder to fit. Spiral convex portion (11) to be combined, a plug body bottom (14) provided with a tension ring (12) and an open thin wire (13) on the inner periphery of the lower end of the cylinder, and the circular shape on the outer periphery of the lower end of the cylinder A cylindrical spout plug (10) made of polyolefin having a circular flange portion (15) for locking the spout plug (10) to the opening (42); and the circular opening (42) It is located between the peripheral inner surface side and the outer surface side of the circular flange portion (15) and is heat-sealed with each.Laminated with a polyethylene layer (21) on at least the inner surface side and a polyester layer (22) on the outer surface side. Ring-plate-shaped laminate (20); heat plugged with the plug body bottom (14), the circular flange portion (15) and the ring-plate-shaped laminate (20) positioned on the inner surface side. Let me Polyester layer Kutomo inner surface (31) or baking epoxy resin layer (3
1) and a disc-shaped laminate (30) in which a polyethylene layer (32) is laminated on the outer surface; and a polyolefin layer is not exposed on the inner surface, and the odor components of the contents are not exposed. An object of the present invention is to provide a spout for a liquid paper container with low permeation and adsorption.

In the present invention, a spiral ridge (11) into which a lid (not shown) is screwed and fitted to the outer periphery of the upper portion of the cylinder, a tension ring (12) and an open thin wire ( 13) provided with a plug bottom (14), and the circular opening on the outer periphery of the lower end of the cylinder
Circular flange (15) that locks spout plug (10) to (42)
The polyolefin cylindrical spout plug (10) having the same as the conventional cylindrical spout plug widely used, using an olefin resin material such as polyethylene or polypropylene, usually Is used to form the cylindrical spout plug (10) by the injection molding method of (1).

According to the present invention, polyethylene is provided at least between the inner surface and the inner surface of the circular opening (42), which is located between the inner surface around the circular opening (42) and the outer surface of the circular flange (15). The ring plate laminate (20) in which the layer (21) and the polyester layer (22) are laminated on the outer surface side has a thickness of 1 on the inner surface side.
A low-density polyethylene (LDPE) layer having good heat-sealability of about 0 to 30 μm (21), and the same polyethylene terephthalate (41) as the inner side (41) of the liquid paper container having a thickness of about 10 to 30 μm on the outer side ( (PET) layer (22), and if necessary, an appropriate intermediate resin layer, etc., are laminated by an appropriate method such as an adhesive method, and the outer diameter is a circular flange portion (15) in a normal punching process. This is for punching a ring plate-like laminate (20) which is one size larger.

[0010] At least the inner surface of the present invention is located at the inner surface side of the plug body bottom portion (14), the circular flange portion (15), and the ring plate-shaped laminate (20), and is heat-sealed with each. Disc-shaped laminate with a polyester layer (31) or baked epoxy resin layer (31) on the side and a polyethylene layer (32) on the outer surface
Regarding (30), polyethylene terephthalate (PET) with a small adsorption of fragrance components having a thickness of about 10 to 20 μm
P) layer (31) or a baked epoxy resin layer (31), etc., and (32) such as a low-density polyethylene (LDPE) layer having a good heat-fusing property with a thickness of about 20 to 50 μm on the outer surface side, an intermediate layer ( 34) An aluminum foil layer or an intermediate resin layer for improving the cutability by adding bulk to the disk-shaped laminate (30) as an adhesive is laminated by an appropriate method such as an adhesive method. In this method, a disk-shaped laminate (30) having the same diameter as the ring-shaped plate-like laminate (20) is punched. It should be noted that the pull ring (12) of the cylindrical spout plug (10) of the present invention is pulled to remove the pull ring (12) and the bottom (14) of the plug body inside the thin open wire (13). When opening the plug
In order to cut and remove the central portion of the disc-shaped laminate (30) thermally fused to the inner surface side of 4), the disc-shaped laminate (30) corresponding to the position of the open thin line (13) It is preferable to provide a circular half-cut line (33) shown in FIG.

The method of attaching the spout of the liquid paper container of the present invention to the circular opening (42) of the liquid paper container (40) such as a gable roof having a polyester layer (41) laminated at least on the inner surface side. About, for example, the plug body bottom (1
4) and the circular flange portion (15) on the inner surface side,
Using a polyolefin cylindrical spout plug (10) heat-sealed with the polyethylene layer (32) on the outer surface side of (0), a cylindrical spout plug with a ring plate-shaped laminate (20) inserted (10) is inserted into the circular opening (42) from the inner surface and heat-sealed.For example, using the conventional heat-sealing equipment as it is, the liquid paper container (40 ) Is attached to the circular opening (42).

[0012]

According to the present invention, the spout plug of the liquid paper container according to the present invention includes:
As shown in FIG. 1, in order to heat-bond the polyester layer (41) on the inner surface side of the liquid paper container (40) and the polyester layer (22) on the outer surface side of the ring plate-shaped laminate (20), Polyethylene layer (21) on the inner surface side of ring plate-like laminate (20) and disc-like laminate
In order to thermally fuse the polyethylene layer (32) on the outer surface side of (30) with the polyethylene layer (32), the spout plug of the liquid paper container attached by heat fusion to the inner surface side around the circular opening (42) is firmly attached. Only the polyester layer (41) on the inner surface side of the liquid paper container (40) and the polyester layer (31) or the baked epoxy resin layer (31) on the inner surface side of the disc-shaped laminate (30) are on the inner surface side. The contents of the liquid paper container, such as juices, seasonings, and alcoholic beverages, are exposed and the polyolefin layer of the polyolefin cylindrical spout plug (10) is not exposed at all on the inner side. With low permeation and adsorption of fragrance components.

[0013]

FIG. 1 is a sectional view of a spout of a liquid paper container according to an embodiment of the present invention. FIG. 2 is a perspective view of a spout of a liquid paper container of the present invention. Paper container (4
It is a perspective view showing the state attached to the circular opening (42) of (0).

The cylindrical spout plug (10) of this embodiment is the same as the conventional one, and is made of white opaque low-density polyethylene (LDPE) and has an outer diameter of 22 mm (a circular flange portion (15)).
The outer diameter of the cylinder is 36 mm) and the cylindrical spout plug with a length of 16 mm (10)
Is injection molded.

The ring plate-like laminate (20) of this embodiment has a 20 μm thick low density polyethylene (LDPE) on the inner surface side.
A film (21) and a polyethylene terephthalate (PETP) film (22) having a thickness of 20 μm on the outer surface side are laminated via an adhesive layer to form a ring plate-like laminate (20) having an outer diameter of 56 mm and an inner diameter of 24 mm. It was punched and cut.

The disk-shaped laminate (30) of this embodiment is as follows:
15 μm thick polyethylene terephthalate (PETP) film (31), 20 μm thick stretched polyester (O-PET) film (34) and 9 μm thick aluminum (Al) foil
(34) and a low-density polyethylene (LDPE) film (32) having a thickness of 30 μm are laminated through an adhesive layer (Al and LDPE are extruded by an extrusion method). The disk-shaped laminate (30) having a diameter of 56 mm provided with a circular half-cut line (33) reaching the aluminum (Al) foil (34) from the side is punched and cut.

Next, the present invention is applied to a gable-roof-shaped liquid paper container (40) similar to the conventional one having a polyethylene terephthalate (PETP) layer (41) laminated on the inner surface side in a circular opening (42) having a diameter of 24 mm. In the embodiment, the cylindrical spout plug (10) into which the ring plate-shaped laminate (20) is inserted is inserted into the circular opening (42) from the inner surface side, and the ring plate-shaped laminate (20) is inserted. Is located between the inner surface side around the circular opening (42) and the outer surface side of the circular flange portion (15), and then the disk-shaped laminate (30) is connected to the plug body bottom (14). It is located on the inner surface side of the circular flange portion (15) and the ring plate-shaped laminate (20), and uses the conventional heat-sealing equipment for a spout plug as it is. In this method, the spout of the liquid paper container of this embodiment is simply attached to the circular opening (42) of the liquid paper container (40).

[0018]

As described above, as shown in the operation and the embodiment, the spout of the liquid paper container according to the present invention is the same as the conventional spout made of polyethylene. That can be easily attached to the circular opening of the liquid paper container by using the heat fusion equipment for heat treatment as it is, and the polyester layer on the inner surface side of the liquid paper container and the ring plate-shaped laminate In order to thermally fuse the polyester layer on the outer surface of the ring-shaped laminate and the polyethylene layer on the inner surface of the ring-shaped laminate and the polyethylene layer on the outer surface of the disc-shaped laminate, a circular opening is performed. The spout plug of the liquid paper container attached by heat fusion to the inner surface side around the hole is strong, and the polyester layer on the inner surface side of the liquid paper container and the polyester layer on the inner surface side of the disc-shaped laminate are Only the baked epoxy resin layer is exposed on the inner surface Because the polyolefin layer of the polyolefin cylindrical spout plug is not exposed at all on the inner surface, the permeation and absorption of flavor components such as juices, seasonings, and alcoholic beverages are low. It is possible to provide a spout of a liquid paper container having good storage stability.

[Brief description of the drawings]

FIG. 1 is a sectional view of a spout of a liquid paper container according to an embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which the spout of the liquid paper container according to the present invention is attached to the circular opening () of the liquid paper container (40) having a gabled roof shape.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Spout outlet plug 11 ... Helical convex part 12 ... Tension ring 13 ... Open thin-walled wire 14 ... Plug body bottom 15 ... Circular flange part 20 ... Ring plate-shaped laminated body 21 ... Polyethylene layer 22 ... Polyester layer 30 ... Circle Plate-like laminate 31 ... Polyester layer, baked epoxy resin layer 32 ... Polyethylene layer 33 ... Circular half-cut line 34 ... Intermediate layer 40 ... Liquid paper container 41 ... Polyester layer 42 ... Circular opening

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shigetaka Oishi 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. Examiner Yasushi Ohashi (56) References Japanese Utility Model No. 4-124913 (JP, U ) Japanese Utility Model 4-100423 (JP, U) Japanese Utility Model Showa 60-106918 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] 1. A spout plug which is attached to a circular opening of a liquid paper container having a gable roof and has a polyester layer laminated on at least an inner surface thereof, wherein a lid is screwed into an outer periphery of an upper portion of the cylinder to be fitted. A helical ridge, a plug bottom provided with a tension ring and an opening thin line on the inner periphery of the lower end of the cylinder, and a circular flange portion on the outer periphery of the lower end of the cylinder for connecting a spout plug to the circular opening. And a polyolefin cylindrical spout plug having a; and a heat-fused portion located between the inner surface side around the circular opening and the outer surface side of the circular flange portion, at least on the inner surface side. A ring plate-like laminate in which a polyethylene layer and a polyester layer are laminated on the outer surface side; and a heat-sealing with the plug body bottom portion, the circular flange portion and the ring plate-like laminate positioned on the inner surface side. ,
A spout for a liquid paper container, comprising: a disc-shaped laminate in which a polyester layer or a baked epoxy resin layer is laminated on at least the inner side and a polyethylene layer is laminated on the outer side.