JPH0726328U - Liquid paper container - Google Patents

Abstract

(57) [Abstract] [Purpose] In a liquid paper container used for alcoholic beverages, fruit juice drinks, softening agents, etc., to prevent the punching end face of the spout of the paper container from coming into contact with the contents. In a liquid paper container made of a laminated material having paperboard as a base material, a punching end face of a spout of the paper container is covered with a synthetic resin layer including an outermost layer and an innermost layer of the laminated material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spout of a liquid paper container used for alcoholic beverages, fruit juice drinks, softening agents and the like, and more particularly to a liquid paper container in which the punched end face of the spout is protected from the contents.

[0002]

[Prior art]

 In recent years, liquid paper containers with flat or gable roof tops have replaced conventional glass containers, metal containers and plastic containers with chilled distribution types such as milk, lactic acid bacteria drinks, liquid soups, sake, fruit juice drinks, etc. It has come to be used in large quantities in a wide range of applications such as cold-flowing liquid foods that require long-term storage such as noodle soup. Recently, it has also been used for non-food products such as liquid detergents, fabric softeners and toiletries. Among these liquid paper containers, those that have a spout are, for example, laminated polyethylene layers / paperboard layers / polyethylene layers or polyethylene layers / paperboard layers / polyethylene layers / aluminum foil layers / polyethylene terephthalate layers / polyethylene layers. The material is punched to form a blank having a spout, and as disclosed in JP-B-58-37828, a film is heat-sealed on the back surface (inside the container) of the spout of this blank. After sealing the spout, side-seal with a sucking machine to make a sleeve, and at the spout position of this sleeve, the film opening blade (automatically by rotating the cap when the cap is attached and detached). A cap with a built-in (which lowers and cuts the film) is heat-sealed to the outermost layer of the paper container and projected to form a sleeve with a cap, The spout sleeved loaded filling machines, and manufacturing box by heat sealing the bottom portion, after filling the contents, were those sealed container to seal the top portion by thermal fusion. As another example, the stopper is protruded from the inside of the spout of the blank, and the blank with the spigot that is heat-sealed to the innermost layer of the paper container at the spout is loaded into the filling machine, and the box is made, filled, and sealed. It was something I did.

[0003]

However, in the liquid paper container having the spout structure of Japanese Utility Model Publication No. 58-37828, the filling of the contents is performed only from the opening of the top part, and the contents are discharged from the spout. It could not be filled, and the structure of the spout was relatively complicated. In another example, the liquid paper container with the spout protruding from the inside of the spout of the paper container, the contents dripping from the mouth during use contact the punched end of the spout and penetrate the laminated material. However, delamination (delamination) occurred and it was difficult to remove, so mold easily occurred. In order to solve the above-mentioned problems of the conventional liquid paper container, the present invention protects the punching end of the spout from directly contacting the contents, and the structure of the spout is relatively small. It provides a simple liquid paper container.

[0004]

[Means for Solving the Problems]

 The first invention is a liquid paper container made of a laminated material having paperboard as a base material. As shown in FIG. 1, the punching end face (121) of the spout (120) of the paper container is laminated with the laminated material (110). The liquid paper container (100) is characterized by being covered with the outermost layer (112) and the synthetic resin layer of the innermost layer (113).

In the second invention, as shown in FIG. 2, a synthetic resin stopper (400) is placed at the top of the paper container at the position of the spout (220) of the liquid paper container of the first invention. The liquid paper container (200) is characterized in that the liquid paper container (200) is heat-sealed with the outer layer (212) or the innermost layer (213).

As shown in FIG. 3, the third device of the present invention is a film (600) in which the spout (320) of the liquid paper container of the first device is heat-sealed with the outermost layer (312) of the paper container. ) Is a liquid paper container (300) characterized by being sealed with.

As shown in FIG. 4, the fourth invention is a film (800) in which the spout (720) of the liquid paper container of the first invention is heat-sealed with the outermost layer (712) of the paper container. ), And a liquid paper container (700) characterized in that a spigot (900) containing a film opening blade (920) is heat-fused and projected on the film.

The above-mentioned synthetic resin layer is usually a film layer of a polyolefin resin such as polyethylene or polypropylene, but a polyester resin film layer may be used.

A synthetic resin spigot is a resin whose material can be heat-sealed with a synthetic resin layer outside or inside a spout of a paper container, and is made of polyethylene, polypropylene, polyester resin, or the like. Mold by the molding method.

The film for sealing the spout may be a single layer or a laminate, but the layer that is heat-sealed with the paper container or the stopper is the outermost synthetic resin layer or the stopper of the paper container. This is a synthetic resin layer that can be heat-sealed with a synthetic resin, and as its material, polyethylene, polypropylene, polyester resin, etc. are mainly used.

[0011]

[Action]

 In the liquid paper container of the present invention, the punching end face of the spout of the paper container is covered with the outermost layer of the laminated material and the synthetic resin layer of the innermost layer, so that the contents directly contact the punching end face of the spout. Never.

[0012]

【Example】

<Example 1> First, in order to produce a laminate material of the liquid sheet container according to this embodiment, FIG. 5 (a), the basis weight of the substrate layer of 350 g / m ² paperboard (211 Characters and patterns were printed (217) on the surface of () by the offset printing method. Separately, a 9 μm thick aluminum foil was laminated on a 12 μm thick stretched polyethylene terephthalate film by a dry lamination method, and the aluminum foil layer of this laminated film was extruded on the back surface of the above-mentioned printed paper board by a 25 μm thickness by an extrusion lamination method. 5B, the printed layer (217) / paperboard layer (211) / polyethylene layer (214) / aluminum foil layer (215) / stretched polyethylene terephthalate film layer (216) shown in FIG. A laminated material (230) having a constitution was prepared. Next, as shown in FIG. 5 (c), a pouring outlet (220) was punched with a punching machine at the pouring outlet position of the liquid paper container when the laminated material was boxed, in accordance with the printing pattern. As shown in FIG. 5D, a polyethylene layer (212, 213) having a thickness of 60 μm was laminated on the entire front and back surfaces of the laminated material (230) punched out of this spout by an extrusion lamination method, and then, as shown in FIG. ), The polyethylene film in the spout is punched out, and the punched end (221) of the spout is covered with a polyethylene layer. [Liquid container outer side] polyethylene layer (60 μm) relating to the liquid paper container of this embodiment. (212) / printing layer (217) / paperboard layer (350 g / m ² ) (211) / polyethylene layer (25 μm) (214) / aluminum foil layer (9 μm) (215) / stretched polyethylene terephthalate layer (12 μm) ( 216) / polyethylene layer (60 μm) (213) A laminated material (210) having a [inside the container] configuration was produced.

Next, using the produced laminated material having a spout, a blank is produced in a normal punching process, and this blank is side-sealed by a sack applicator to produce a sleeve. At this position, the separately prepared spout was sealed with a thin plate of weak line and a closure plate with a tensile ring, and a polyethylene plug with a cap was attached to the outermost polyethylene layer of the paper container by heat fusion. I set it up. Then, this sleeve with a stopper is loaded into a filling machine, the bottom portion is heat-sealed to form a box, and the colored test solution is filled therein, and then the top portion is heat-sealed and hermetically sealed. A liquid paper container (200) having a gable roof shape as shown in (a) was produced. In the filling process of the contents, after filling the contents from the spout of the paper container, the spout having a cap attached to the spout may be heat-sealed to seal the paper container.

The filled liquid paper container of the present example was subjected to a normal circulation process and then opened to check the state of the punched end portion of the pouring outlet. The penetration of the colored test liquid into the punched end portion was examined. Was not confirmed at all, and no delamination occurred.

Example 2 First, in the same manner as in Example 1, the polyethylene layer (outside the container) polyethylene layer (312) shown in FIG. 3 relating to the liquid paper container of this example in which the punched end of the spout was covered with polyethylene. ) (25 μm) / paperboard layer (311) (350 g / m ² ) / polyethylene layer (314) (25 μm) / aluminum foil layer (315) (9 μm) / stretched polyethylene terephthalate layer (316) (12 μm) / polyethylene layer A laminated material (310) having a configuration of (313) (25 μm) [inside the container] was produced.

Next, as shown in FIG. 3, the prepared spout of the laminated material having the spout was prepared by separately manufacturing [upper] stretched polyethylene terephthalate layer (12 μm) (610) / aluminum foil layer (9 μm) ( 620) / polyethylene layer (25 μm) (630) [lower side] covered with a laminated film (600), and heat-melt the outermost polyethylene layer (312) of the paper container and the laminated polyethylene film (630). And then seal the spout (320), use the laminated material with the spout sealed with this laminated film to make a blank in the usual punching process, and then side seal this blank with a sack applicator. To prepare a sleeve, load the sleeve into a filling machine, heat-seal the bottom to make a box, fill the colored test liquid, and then heat-seal the top to seal it. of A liquid paper container (300) having a flat top as shown in FIG. 6B was produced. In the filling process of the contents, after filling the contents from the spout of the paper container, the spout may be covered with a film and heat-sealed to seal the paper container.

The filled liquid paper container of the present example was subjected to a normal circulation process and then opened to examine the state of the punched end portion of the pouring outlet. The colored test liquid penetrated into the punched end portion. Was not confirmed at all, and delamination did not occur.

Example 3 First, in the same manner as in Example 1, the polyethylene layer (712) outside the container shown in FIG. 4 relating to the liquid paper container of this example in which the punched end of the spout was covered with polyethylene. ) (25 μm) / paperboard layer (711) (350 g / m ² ) / polyethylene layer (714) (25 μm) / aluminum foil layer (715) (9 μm) / stretched polyethylene terephthalate layer (716) (12 μm) / polyethylene layer A laminated material (710) having a configuration of (713) (25 μm) [inside the container] was produced.

Next, as shown in FIG. 4, the produced spout of the laminated material having the spout was separately prepared [upper] polyethylene layer (25 μm) (810) / aluminum foil layer (9 μm) (820). / Polyethylene layer (25 μm) (830) [lower side] covered with a laminated film (600), and heat-sealed the outermost polyethylene layer (712) of the paper container and the laminated polyethylene film (830). Then, the spout (720) was sealed, and a blank was prepared by a normal punching process using the laminated material in which the spout was sealed with this laminated film, and the blank was side-sealed with a sack applicator. A sleeve is made by using a sleeve (900) at the pouring position of this sleeve, as shown in FIG. 4, which incorporates a separately prepared film opening blade (920) and is equipped with a cap (960). The bottom surface of the pedestal flange (910) of the spigot and the upper polyethylene layer (810) of the laminated film were heat-fused and projected. Then, this sleeve with a stopper is loaded into a filling machine, the bottom is heat-sealed to form a box, the colored test solution is filled, and then the top is heat-sealed to seal the top of the present embodiment. A gable roof liquid paper container (700) was prepared.

The filled liquid paper container of the present example was subjected to a normal circulation process and then opened to check the state of the punched end portion of the spout, and the penetration of the colored test liquid into the punched end portion was investigated. Was not confirmed at all, and delamination did not occur.

[0021]

[Effect of device]

 In the liquid paper container of the present invention, the punching end face of the spout of the paper container is covered with the outermost layer of the laminated material and the synthetic resin layer of the innermost layer, so that the contents directly contact the punching end face of the spout. There is nothing to do.

In addition, it is easy to heat-bond a film or spout to the spout of the liquid paper container of the present invention according to the purpose of use of the container, and the structure of the spout is relatively simple. Becomes

[Brief description of drawings]

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

FIG. 2 is a sectional view of a spout of the liquid paper container according to the first embodiment.

FIG. 3 is a cross-sectional view of a spout portion of a liquid paper container according to a second embodiment.

FIG. 4 is a sectional view of a spout portion of a liquid paper container according to a third embodiment.

5A and 5B are explanatory views showing a manufacturing process of a laminated material of a liquid paper container of the present invention, wherein (a) is a paperboard printing process, (b) is a laminated material laminating process, and (c) is a spout punching process. Step (d) is a laminating step for the outermost layer and the innermost layer, and (e) is a punching step for the outermost layer and the innermost layer in the spout.

FIG. 6 (a) is a perspective view of a liquid paper container having a gable roof with a spout, and FIG. 6 (b) shows a liquid paper container having a flat top with a spout sealed with a film. It is a perspective view.

[Explanation of symbols]

100, 200, 300, 700 ... Liquid paper container 110, 210, 230, 310, 710 ... Laminated material 111, 211, 311, 711 ... Paperboard 112 ... Outermost layer 113 ... Innermost layer 212, 312 ... Outermost layer or polyethylene layer 213, 313 ... Innermost layer or polyethylene layer 120, 220, 320, 720 ... Spout 121, 221, 321, 721 ... Punching end face 214, 314, 603, 712, 713, 714, 8
10,830 ... Polyethylene layer 215, 315, 602, 715, 820 ... Aluminum foil layer 216, 316, 601, 716 ... Stretched polyethylene terephthalate film layer 217 ... Printing layer 400, 900 ... Spout 410, 910 …… Pedestal flange 420 …… Tensile ring 430 …… Thin weak line 440 …… Closing plate 450 …… Male screw 500 …… Cap 600,800 …… Film 920 …… Opening blade

Claims (4)

[Scope of utility model registration request] 1. A liquid paper container made of a laminated material using paperboard as a base material, wherein a punching end face of a spout of the paper container is covered with an outermost layer of the laminated material and an innermost synthetic resin layer. Liquid paper container to be used. 2. A liquid resin container according to claim 1, wherein a spout made of synthetic resin is projected from the outermost layer or the innermost layer of the paper container by heat fusion at the position of the spout. Liquid paper container. 3. A liquid paper container characterized in that the spout of the liquid paper container according to claim 1 is sealed with a film heat-sealed to the outermost layer of the paper container. 4. The spout of the liquid paper container according to claim 1 is sealed with a film which is heat-sealed with the outermost layer of the paper container, and a cap having a film opening blade is provided on the film. A liquid paper container characterized by being heat-fused and protrudingly provided.