JP2562651Y2 - 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 an improvement of a spout plug for a liquid paper container, which has a low permeation and adsorption of aroma components such as juices, seasonings and liquors, and little transfer of resin odor.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a polyolefin layer (52, 52) such as polyethylene (PE) or polypropylene (PP) is laminated at least on an inner surface and an outer surface.
Circular aperture (53) in liquid paper container (50), such as a gable roof
A spout plug (commonly referred to as an external spout) attached to the
A helical ridge (11) for fitting a lid (not shown) provided on the outer periphery of the upper portion of the cylinder, and a cylindrical spout plug (10) provided on the outer periphery of the lower end of the cylinder are connected to the circular opening ( 53) a ring-shaped plate-shaped flange (12) to be attached by heat-sealing, and a saw blade-shaped opening member for cutting and opening the disk-shaped sealing laminate (20) fitted to the inner periphery of the lower part of the cylinder.
(13) and a polyolefin cylindrical spout plug having
(10) and; positioned on the inner surface of the periphery of the circular opening (53) to seal the circular opening (53) by heat fusion, laminating a polyolefin layer (22) on at least the outer surface side A disc-shaped sealing laminate (20) having an outer diameter larger than the inner diameter of the circular opening (53); and an outer surface side around the circular opening (53) and the disc-shaped sealing laminate. (20) and heat-fused with each to protect the inner peripheral end surface of the circular aperture (53), laminating a polyolefin layer (32, 32) at least on the inner surface and the outer surface A ring plate-shaped protective laminate having an inner diameter slightly smaller than the inner diameter of the circular opening (53) and an outer diameter slightly larger than the inner diameter of the circular opening (53).
(30) and the spout plug of the liquid paper container composed of; is widely used, each polyolefin layer (52,22,32) with good heat-sealing property and a polyolefin cylindrical By heat-sealing the spout plug (10) and the liquid paper container
It is used by being attached to the circular opening (53) of (50).

[0003]

[Problems to be solved by the invention] With the recent diversification and sophistication of eating habits, the flavor components of the contents of the liquid paper container (50), such as juice, seasonings and alcoholic beverages, etc. In addition to preventing the transmission of
The problem is that the odorous components and the like are adsorbed to the polyolefin layer (52) on the inner surface side of the liquid paper container (50), and the unique resin odor of the polyolefin layer (52) is transferred to the contents. It is a problem that, instead of the polyolefin layer (52) on the inner surface side of the liquid paper container (50), polyethylene terephthalate (PET) or Laminated low-adsorbent resin layer (51) such as ethylene-vinyl alcohol copolymer (EVOH),
A liquid paper container (50) such as a gable roof type has been developed.

On the other hand, a conventional disc-shaped sealing laminate (20) in which a polyolefin cylindrical spout plug (10) and a polyolefin layer (22) are laminated and a polyolefin layer (32,3) shown in FIG.
With respect to the spout plug of the liquid paper container composed of the ring-plate-shaped protective laminate (30) obtained by laminating 2), the low-adsorption resin layer (51) laminated on the inner surface side of the liquid paper container (50) And a polyolefin layer (22) laminated on the outer surface side of the disc-shaped sealing laminate (20)
3 is difficult to be thermally fused (or no thermal fusion is performed, or the adhesive strength is weak even when thermally fused), so that the conventional spout stopper shown in FIG. It is difficult to attach to the hole (53) (the outer surface of the disc-shaped sealing laminate (20) is
Positioned on the inner surface side around (3) and heat-sealed to form a circular opening (5
3) cannot be sealed), and
No. 6431 (see FIG. 4), the circular aperture (53)
Between the inner peripheral side of the periphery and the outer peripheral side of the disk-shaped sealing laminate (20), and heat-sealed with each.At least the polyolefin layer (62) on the inner side and the lower surface on the outer side. Ring-shaped intervening laminate with the adsorbent resin layer (61) laminated, the inner diameter of which is the same as the inner diameter of the circular opening (53) and the outer diameter of which is the same as the outer diameter of the disc-shaped sealing laminate (20) By using the body (60), the outer surface of the disc-shaped sealing laminate (20) is heat-sealed to the inner surface around the circular opening (53) to seal the circular opening (53). It is stopped.

However, in Japanese Utility Model Application No. 3-6431 shown in FIG. 4, a circular opening (5) is formed by using a ring plate-shaped interposed laminate (60).
Regarding the spout plug of the liquid paper container that seals 3), simply interposing the ring plate-shaped intervening laminate (60), each polyolefin layer (62 and 22) with good heat sealability, low Adhesive resin layers (61 and 51) are heat-sealed for easy liquid paper container
Although it is an excellent device that can seal the circular opening (53) of (50), even if the surface area is small, a ring-shaped The problem is that the polyolefin layer (62) on the inner surface side of the laminate (60) and the polyolefin layer (22) on the outer surface side of the disc-shaped sealing laminate (20) are interposed (laminated), In order to completely prevent the permeation and adsorption of the above-mentioned odor components and the migration of resin odor, etc., a spout plug with no polyolefin layer on the inner surface (contents) side of the liquid paper container (50) is required. Is what is being done.

[0006]

According to the present invention, a conventional cylindrical spout plug (10) and a disc-shaped sealing laminate (2) described later are used.
0), the ring-plate-shaped protective laminate (30), and the ring-plate-shaped mounting laminate (40) are used together to meet the above-mentioned demand, and as shown in FIGS. At least, on the inner surface side, a low adsorption resin layer (51) such as polyethylene terephthalate (PET) or ethylene-vinyl alcohol copolymer (EVOH) and a polyolefin layer such as polyethylene (PE) or polypropylene (PP) on the outer surface side ( 52), and a spout plug (commonly called an external plug) attached to the circular opening (53) of the liquid paper container (50), such as a gable roof, A ring for attaching a provided helical projection (11) for fitting a lid (not shown) and a cylindrical spout plug (10) provided on the outer periphery of the lower end of the cylinder to the circular opening (53). Plate-shaped collar
(12) and a disc-shaped sealing laminate fitted to the inner periphery of the lower part of the cylinder
(20) for cutting and opening the saw blade-shaped opening member (13), and a polyolefin cylindrical spout plug (10) having; a position on the inner surface side around the circular opening (53). And heat-sealed to seal the circular opening (53), laminating the low-adsorptive resin layers (21, 21) at least on the inner surface side and the outer surface side, and having an outer diameter of the circular opening portion (53). ) And a disc-shaped sealing laminate (20) larger than the inner diameter of the disc-shaped sealing laminate (20), located on the outer surface side around the circular opening (53) and the outer surface side of the disc-shaped sealing laminate (20). Protect the inner peripheral end face of the circular opening (53) by heat fusion with each, at least a low adsorption resin layer (31) on the inner side and a polyolefin layer (32) on the outer side
A ring plate-shaped protective laminate (30) having an inner diameter slightly smaller than the inner diameter of the circular opening (53) and an outer diameter slightly larger than the inner diameter of the circular opening (53); The outer peripheral side of the periphery of the portion (53) and the outer peripheral side of the outer periphery of the ring plate-shaped protective laminate (30) are located between the inner peripheral side of the ring plate-shaped flange portion (12). The cylindrical spout plug (10) is attached to the circular opening (53), and the polyolefin layers (42, 42) are laminated at least on the inner surface side and the outer surface side. 53) Ring-shaped protective laminate with the same outer diameter as the inner diameter of 53)
Ring plate-shaped mounting laminate sufficiently larger than the outer diameter of (30) (40)
And; the inner surface of the liquid paper container (50)
An object of the present invention is to provide a spout for a liquid paper container, in which a polyolefin layer does not exist on the (contents) side, and there is little permeation and adsorption of aroma components and migration of resin odor.

In the present invention, the helical convex portion (11) for fitting a lid provided on the outer periphery of the upper portion of the cylinder and the cylindrical spout plug (10) provided on the outer periphery of the lower end of the cylinder are connected to the circular opening. A ring plate-shaped flange portion (12) to be attached to the portion (53), and a saw blade-shaped opening member (13) for cutting and opening the disk-shaped sealing laminate (20) fitted to the inner periphery of the lower part of the cylinder; And, having a polyolefin cylindrical spout plug (10) having the same as the conventionally widely used cylindrical spout plug (10), polyethylene (PE) or polypropylene (PP) By using an olefin resin material such as this, a cylindrical injection port plug (10) having an inner diameter that is the same as or slightly smaller than the inner diameter of the circular opening (53) is formed by a normal injection molding method.

In the present invention, the circular opening (53) is positioned on the inner surface around the circular opening (53) and sealed by heat fusion to seal the circular opening (53). Adsorbent resin layer (21,
21), a disc-shaped sealing laminate (20) having an outer diameter larger than the inner diameter of the circular opening (53) is formed on a liquid paper having a thickness of about 10 to 30 μm on the inner surface and the outer surface. Low adsorptivity that can be thermally fused to polyethylene terephthalate (PET) or ethylene-vinyl alcohol copolymer (EVOH) of the same type as the low adsorptivity resin layer (51) laminated on the inner side of the container (50) Resin layer
(21, 21) and, if necessary, an appropriate intermediate resin layer or an aluminum foil layer, etc., are laminated by an appropriate method such as an adhesive method, etc. This punches out a disc-shaped sealing laminate (20) having a diameter larger than the inner diameter of the circular opening (53).

In the present invention, a circular hole is formed by being heat-sealed with the outer peripheral side of the circular hole (53) and the outer surface of the disk-shaped sealing laminate (20). Protecting the inner peripheral end face of the portion (53), at least a low adsorption resin layer (31) on the inner surface side and a polyolefin layer (32) laminated on the outer surface side, the inner diameter is larger than the inner diameter of the circular aperture (53) A slightly smaller hole with a circular outer diameter (53)
The ring-shaped protective laminate (30) slightly larger than the inner diameter of the low-adsorbent resin layer laminated on the outer surface of the disc-shaped sealing laminate (20) having a thickness of about 10 to 30 μm on the inner side. (twenty one)
Can be thermally fused with the polyolefin layer (52) laminated on the outer surface side of the liquid paper container (50) (however, the adhesive strength is weak even when thermally fused), A low-adsorptive resin layer (31) such as polyethylene terephthalate (PET, J802 (see Examples), etc.) or ethylene-vinyl alcohol copolymer (EVOH), and heat-sealing with a thickness of about 10 to 20 μm on the outer surface side Good polyolefin layer (32), and further, if necessary, an appropriate intermediate resin layer, etc., are laminated by an appropriate method such as an adhesive method, respectively, and, as in the past, the inner diameter is subjected to a normal punching process. Is slightly smaller (3-5 mm) than the inner diameter of the circular opening (53), and the outer diameter is slightly smaller (4-8 mm) than the inner diameter of the circular opening (53).
A large ring plate-shaped protective laminate (30) is punched.

In the present invention, the outer surface of the periphery of the circular opening (53), the outer surface of the outer periphery of the ring-shaped protective laminate (30), and the inner surface of the ring-shaped flange (12). Attach the cylindrical spout plug (10) to the circular opening (53) by heat-sealing with each of the polyolefin layers (42, 42) at least on the inner surface side and the outer surface side. The inner diameter is the same as the inner diameter of the circular opening (53) and the outer diameter is a ring-shaped plate-shaped protective laminate (3
The ring-shaped mounting laminate (40), which is sufficiently larger than the outer diameter of (0), has good heat-fusibility of about 10 to 20 μm in thickness between the inner surface and the outer surface through an appropriate intermediate resin layer or the like. Polyolefin layers (42, 42) are laminated by an appropriate method such as a melt extrusion method, and the thickness is merely 40 to 100 μm.
Polyolefin film with good heat sealability of about m (42)
In the same manner as described above, in the normal punching step, the inner diameter is the same as the inner diameter of the circular opening (53), and the outer diameter is a ring plate-shaped protective laminate.
This is for punching a ring-shaped mounting laminate (40) which is sufficiently (10 mm or more) larger than the outer diameter of (30). In addition, in the case where the molding die of the cylindrical spout plug (10) widely used in the related art is allowed to be changed, the spout plug described later is circularly opened in the liquid paper container (50). If there is no problem in the process of attaching to the part (53), the ring plate-shaped mounting laminate of the present invention (40)
Instead of a ring-shaped flange (12) of a cylindrical spout plug (10)
Should be extended (see Japanese Utility Model Application No. 4-43778).

The present invention comprises a cylindrical spout plug (10), a disk-shaped sealing laminate (20), a ring-plate protective laminate (30), and a ring-plate mounting laminate (40). Attach the spout of the liquid paper container to be
Gable with a low adsorption resin layer (51) such as (PET) or ethylene-vinyl alcohol copolymer (EVOH) and a polyolefin layer (52) such as polyethylene (PE) or polypropylene (PP) on the outer surface Circular opening of liquid paper container (50) such as roof type
For example, the outer surface of the inner periphery of the ring-shaped mounting laminate (40) may be heated in advance on the inner surface of the ring-shaped flange (12) of the cylindrical spout plug (10). By fusing, the ring plate-shaped mounting laminate (40) is attached to the outer peripheral side of the outer periphery of the ring plate-shaped protective laminate (30) in advance.
The inner surface of the inner periphery is heat-sealed, so that the conventional heat-sealing equipment can be used as it is, and the spout plug of the liquid paper container can be easily opened in a circular hole (53) as before. It can be attached to

[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, the low-adsorptive resin layer (51) laminated on the inner surface side of the liquid paper container (50) and the outer surface side of the disc-shaped sealing laminate (20)
In order to thermally fuse the low-adsorption resin layer (21) laminated on the inner surface (and the inner surface side), the heat fusion is strong and the circular opening (53) of the liquid paper container (50) is formed as in the related art. Is completely sealed, and since there is no polyolefin layer (lamination) on the inner surface (contents) side of the liquid paper container (50), permeation and adsorption of odor components and transfer of resin odor etc. Can be completely prevented.

Further, in the spout of the liquid paper container according to the present invention, as shown in FIG. 1, the inner surface of the ring-shaped flange (12) of the cylindrical spout plug (10) made of polyolefin is connected to the spout. A polyolefin layer (42) laminated on the inner surface side of the ring plate-shaped mounting laminate (40) to thermally fuse the polyolefin layer (42) laminated on the outer surface side of the ring plate-shaped mounting laminate (40).
And the polyolefin layer (52) laminated on the outer surface side of the liquid paper container (50), the respective heat seals are strong, and the cylindrical spout plug (10 ) And the circular opening (53) of the liquid paper container (50) are completely attached.

Further, in the spout of the liquid paper container according to the present invention, as shown in FIG.
In order to heat-bond the low-adhesive resin layer (21) laminated on the outer surface side and the low-adsorbent resin layer (31) laminated on the inner surface side of the ring plate-shaped protective laminate (30), The inner peripheral end surface of the circular opening (53) of the liquid paper container (50) is
(Exposed paper layer etc.) can be completely protected (does not come into contact with the contents).

[0015]

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 (5
It is a perspective view showing the state attached to the circular opening (53) 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 inner diameter of 20 mm (outer diameter of 22 mm, ring plate shape). The cylindrical spout plug (10) having a flange portion (12) having an outer diameter of 36 mm and a length of 16 mm is injection-molded.

The disc-shaped sealing laminate (20) of this embodiment comprises a polyethylene terephthalate (PET) film (21) having a thickness of 15 μm and a stretched polyester (O-PET) having a thickness of 12 μm in this order from the inner side. Film and 9μm thick aluminum foil and 30μm thick adhesive polyester (PET) film (21, SEL
AR-PT-J802 (trade name), Dupont Mitsui Chemicals
(Made in Japan)) and a two-part curable urethane-based adhesive, respectively, laminated and punched and cut into a disc-shaped sealing laminate (20) having an outer diameter of 42 mm in a normal punching step. It is.

With respect to the ring-plate-shaped protective laminate (30) of the present embodiment, an adhesive polyester (PET) film (31, SELAR-PT-J802 (trade name), Mitsui Dupont, Chemical Co., Ltd.), a stretched polyester (O-PET) film having a thickness of 20 μm, and a low-density polyethylene (LDPE) film (32) having a thickness of 15 μm, each laminated via a two-component curable urethane-based adhesive. In the normal punching process, the inner diameter is 18 mm (the inner diameter of the circular hole is 22 mm) and the outer diameter is 28 mm.
It is obtained by punching and cutting a ring-shaped protective laminate (30) of mm.

With respect to the ring-shaped mounting laminate (40) of the present embodiment, a low-density polyethylene (15 μm thick) (15 μm thick) is formed on the inner and outer surfaces through a 30 μm thick stretched polyester (O-PET) film. LDPE) layers (42, 42) are laminated by a melt extrusion method, and an inner diameter of 22 mm and an outer diameter of 4
It is obtained by punching and cutting a 2 mm ring-shaped mounting laminate (40).

In the present embodiment, the cylindrical spout plug (10), the disc-shaped sealing laminate (20), the ring-shaped protective laminate (30) and the ring-shaped mounting laminate (40) are used. The spout plug of the liquid paper container to be constituted is, in order from the inner side, a polyethylene terephthalate (PET) film (51) having a thickness of 15 μm, a stretched polyester (O-PET) film having a thickness of 20 μm, and an aluminum foil having a thickness of 9 μm. A circular opening (FIG. 2) of a gable roof type liquid paper container (50) in which a high quality paper layer (625 g / m ² ) and a 15 μm thick low density polyethylene (LDPE) film (52) are laminated. 53) For the method of mounting on the cylindrical spout plug (10)
By heat-sealing the outer surface of the inner periphery of the ring-plate-shaped mounting laminate (40) to the inner surface of the ring-plate-shaped flange portion (12), using the conventional heat-sealing equipment as it is, As in the conventional case, the spout of the liquid paper container is simply attached to the circular opening (53).

That is, first, the outer surface side of the disc-shaped sealing laminate (20) is positioned on the inner surface side around the circular opening (53), and at the same time, the outer surface side around the circular opening (53). And the inner surface side of the ring-shaped plate-shaped protective laminate (30) on the outer surface side of the disc-shaped sealing laminate (20), and the respective low-adsorptive resin layers ( (51,21,31)
(53) and the inner surface of the ring-plate-shaped mounting laminate (40) that has been previously heat-fused to the ring-plate-shaped flange (12) on the outer surface of the periphery of the ring-shaped protective laminate (30). Is positioned, and the respective polyolefin layers (52, 3
2, 42), and the spout of the liquid paper container is attached to the circular opening (53).

In this case, the outer surface (52, low-density polyethylene film having a thickness of 15 μm) around the circular opening (53) is connected to the inner surface (31, having a thickness of 20 μm) of the ring-shaped plate-shaped protective laminate (30). (Polyethylene terephthalate film) was positioned and heat-sealed, as described above, because the adhesive force was weak even after heat-sealing,
Each of the polyolefin layers (52, 32, 42) is firmly fixed by using a ring plate-shaped mounting laminate (40) whose (42 mm) is sufficiently larger than the outer diameter (28 mm) of the ring plate-shaped protective laminate (30). And the attachment between the ring plate-shaped flange portion (12) and the circular opening portion (53) is strengthened.

[0023]

[Effect of the Invention] As described above, as shown in the operation and the embodiment, in the spout of the liquid paper container of the present invention, the low adsorption resin layer (51) laminated on the inner surface side of the liquid paper container (50) is circular. In order to thermally fuse the low adsorption resin layer (21) laminated on the outer surface side (and the inner surface side) of the plate-shaped sealing laminate (20), the heat fusion is strong and the liquid paper container (50) The sealing of the circular opening (53) is complete, and there is no polyolefin layer (lamination) on the inner surface (content) side of the liquid paper container (50). Has no adsorption to the polyolefin layer on the inner surface side of the liquid paper container (50), and the unique resin odor of the polyolefin layer does not migrate to the contents at all.

As shown in the operation and the embodiment, in the spout of the liquid paper container of the present invention, the inner surface of the ring-shaped flange (12) of the polyolefin cylindrical spout plug (10). And a polyolefin layer (42) laminated on the outer surface of the ring-shaped mounting laminate (40), and a polyolefin layer (42) laminated on the inner surface of the ring-shaped mounting laminate (40). ) And the polyolefin layer (52) laminated on the outer surface side of the liquid paper container (50), the respective heat seals are strong, and the cylindrical spout plug (10) and the liquid The attachment of the paper container (50) to the circular opening (53) is complete.

[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 (53) of the gable roof type liquid paper container (50).

FIG. 3 is a sectional view of a conventional spout of a liquid paper container.

FIG. 4 is a cross-sectional view of a spout plug of a liquid paper container in Japanese Utility Model Application No. 3-6431.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Cylindrical spout plug 11 ... Helix convex part 12 ... Ring plate-shaped flange part 13 ... Saw blade-shaped opening member 20 ... Disc-shaped sealing laminated body 21,31,51,61 ... Low adsorption resin layer 22, 32, 42, 52, 62 ... polyolefin layer 23 ... heat-sealed portion 30 ... ring plate-shaped protective laminate 40 ... ring plate-shaped mounting laminate 50 ... liquid paper container 53 ... circular aperture 60 ... ring plate Interposed laminate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigenori Morishima 1-5-1, Taito, Taito-ku, Tokyo Toppan Printing Co., Ltd. Examiner Takao Fushimi (56) Reference Literature 4-100425 (JP, U)

Claims (1)

(57) [Scope of request for utility model registration] (1) At least polyethylene terephthalate (PET) or ethylene-vinyl alcohol copolymer (E
VOH) or other low-adsorption resin layer (51) and polyethylene on the outer surface
Polyolefin layers such as (PE) and polypropylene (PP) (52)
A spout plug attached to the circular opening (53) of the liquid paper container (50), such as a gable roof, in which a lid provided on the outer periphery of the upper part of the cylinder is fitted. Department (1
1), a ring-shaped flange (12) for attaching a cylindrical spout plug (10) provided on the outer periphery of the lower end of the cylinder to the circular opening (53),
A saw blade-shaped opening member (13) for cutting and opening the disc-shaped sealing laminate (20) fitted on the inner periphery of the lower portion of the cylinder, and a polyolefin cylindrical spout plug (10) having And positioned on the inner surface side around the circular opening (53) to seal the circular opening (53) by heat fusion, at least on the inner surface side and the outer surface side of the low-adsorption resin layer (21 , 21) laminated, the outer diameter is a circular opening (53)
A disk-shaped sealing laminate (20) larger than the inner diameter of; and an outer surface side around the circular opening (53) and an outer surface side of the disk-shaped sealing laminate (20), respectively. And heat-sealed to form a circular hole
Protecting the inner peripheral end face of (53), a low-adsorption resin layer (31) at least on the inner surface side and a polyolefin layer (32) laminated on the outer surface side, the inner diameter is slightly smaller than the inner diameter of the circular aperture (53). A ring-shaped protective laminate (30) having a small outer diameter slightly larger than the inner diameter of the circular opening (53); and an outer surface side around the circular opening (53) and the ring-shaped protective laminate (30). ) Is located between the outer surface of the outer periphery and the inner surface of the ring plate-shaped flange (12), and heat-sealed with each of them to open the cylindrical spout plug (10) into a circular opening ( 53), polyolefin layers (42, 42) laminated at least on the inner surface and outer surface,
A ring plate-shaped mounting laminate (40) whose outer diameter is the same as the inner diameter of (3) and is sufficiently larger than the outer diameter of the ring-plate-shaped protective laminate (30); plug.