JPH03114738A - Paper container with pouring plug and manufacturing method thereof - Google Patents

Abstract

PURPOSE:To make the side of a pouring plug unnecessary to be heated by providing annular protrusions on each periphery of an inner side and an outer side of the lower surface side in the flange of a pouring plug main body and sticking them through hot melt. CONSTITUTION:On the lower part of a pouring plug main body 31, a flange 31a is formed and on each periphery of an inner side and an outer side of the lower surface side in the flange 31a, annular protrusions 31b, 31c are provided and further in the intermediate part thereof, a plurality of annular protrusions 31d are formed in the form of a coaxial circle. After processes in the bottom formation of a paper container 1, the filling of content, and the hermetic sealing of the top, the outside adhering process of a pouring plug 3 is carried out. The pouring plug main body 31 is made such that the lower surface side of the flange 31 faces upward, wherein hot melt 4 is applied in a predetermined quantity between the annular protrusions 31b, 31c, and then reversed in order to be press-adhered to a mouth part 1b of the paper container 1. After the adhesion, an inner plug 32 and a cap 33 are attached thereto. Since it is of a method that the pouring plug main body 31 is stuck through hot melt, heating of the side of the pouring plug 3 is not required.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a paper container with a spout stopper used as a container for liquids such as alcoholic beverages and juices.

[Prior Art] Conventionally, among this type of liquid paper containers, there is one in which a synthetic resin pouring spout plug is attached to the slanted wall of the shoulder portion. There are two types of spout plugs: one type has an inner material that is attached to the paper container before it is filled with the contents, and the other type has an outer material that is attached after the paper container is filled with the contents and the top is hermetically sealed. From the viewpoint of gas barrier etc., an external type is preferred, and the structure of the spout plug is disclosed in, for example, Japanese Utility Model Publication No. 58-37828, and the mounting method is disclosed in Japanese Patent Publication No. BF32981, etc. ing.

[Problems to be Solved by the Invention] The conventional spout stopper described above is usually attached to the mouth of a paper container by adhesive means, but when adhering, there are Both the heated flange and the heated flange are heated, and the flange portion is pressed and bonded under the heated state. For this reason, a device that can heat to an optimal temperature is required, and a means for adjusting the temperature of the device is also required.

A technical object of the present invention is to provide a paper container that does not require a conventional spout plug heating device when adhering the spout plug.

[Means for Solving the Problem] As a means for solving this technical problem, the present invention has a flange at the bottom, hot melt is applied to the bottom side of the flange, and the bottom surface of the flange is coated with a synthetic resin layer. A paper container with a spout plug, which is attached to the mouth of a paper container with an annular projection provided on the inner and outer edges of the lower surface of the flange, and the spout plug. Apply hot melt between the annular protrusions with the bottom surface of the flange of the main body facing upward, hold the mouth of the paper container horizontally, and turn the spout plug main body so that the bottom surface of the flange faces upward. The gist of the present invention is a method for manufacturing a paper container with a spout stopper whose side is adhered to the spout.

[Function] Since the spout plug body is bonded with hot melt, there is no need to heat the spout plug as in the conventional method.
In addition, when applying hot melt, make sure that the bottom surface of the flange of the spout plug body faces upward, and the bottom surface of the flange has annular protrusions on the inner and outer edges, so there is a hot melt in between. The hot melt can be easily applied, and when it is inverted and pressure-adhered to the mouth of the paper container, the hot melt can be prevented from spilling out.

[Example] Hereinafter, the present invention will be explained in more detail with reference to the illustrated example.

In Fig. 1, reference numeral 1 is a paper container provided with synthetic resin layers on the front and back surfaces, and one inclined wall 1a is provided with an opening 1b, and a protective film 2 for sealing is provided on the inner surface of the container. It is pasted. Reference numeral 3 denotes a spout stopper made of synthetic resin, which includes a spout plug main body 3I attached to the mouth portion 1b of the paper container 1, an inner stopper 32 for opening provided in the spout plug main body, It consists of a cap 33 that is removably formed on the spout plug main body 1, and when the cap 33 is removed and the inner plug 32 is pushed in, the blade portion 32a formed at the lower part of the inner plug is exposed to the protective film for the seal. 2 can be broken and opened. A flange 31a is formed at the lower part of the spout plug main body 3I, and annular projections 31b and 31c are provided on the inner and outer edges of the lower surface of the flange, respectively, and a plurality of annular projections are also provided in the middle part thereof. 31d are formed concentrically.

The spout stopper 3 thus formed is adhered around the spout 1b of the paper container 1 by applying hot melt 4 to the lower surface of the flange 31a of the spout body 31. That is, as shown in FIG. 2, first, the step (a) of forming the bottom of the paper container 1 is performed, then the step (b) of filling the contents, and then the sealing of the top of the paper container 1 is performed. After step (C) is performed, the external attachment of the spout I stopper is bonded. As a first stage of this bonding step, a heating step (d) is performed in which the area around the spout is heated to an appropriate temperature by the heater 5, and after this, the spout plug main body 3I is bonded with the spout while the spout is held horizontally. be exposed. At this time, a predetermined amount of hot melt 4 is applied between the inner and outer annular protrusions 31b131c of the spout plug main body 31 so that the lower surface side of the flange faces upward, and after application, the hot melt 4 is turned over and the paper container 1 is Mouth part 1
b is pressure bonded. After this adhesion, the paper container 1 is discharged (f), and the inner plug 32 and cap 33 are assembled to complete the spout plug 3. The plurality of annular protrusions 31d formed on the lower surface of the flange are used to prevent uneven application of the hot melt 4 and also to prevent uneven adhesion to the opening of the paper container.

Note that the step of heating the area around the opening of the paper container using the heater may be omitted.

[Effects of the Invention] As explained above, according to the present invention, since the spout plug main body is bonded to the mouth of the paper container using hot melt, it is not necessary to attach the spout plug side as in the conventional method. It eliminates the need for heating, and when applying hot melt, the bottom surface of the flange of the spout plug body faces upward, and the bottom surface of the flange is provided with annular protrusions on the inner and outer edges, respectively. Therefore, the hot melt can be easily applied in between, and when it is reversed and pressure-adhered to the opening of the paper container, it has excellent effects such as preventing the hot melt from spilling out.

[Brief explanation of drawings]

FIG. 1 is a sectional view of the main parts of a paper container according to the present invention, and FIG. 2 is an explanatory diagram showing the assembly of the paper container in the order of steps. 1...Paper container 1a...Slanted wall 1b...
- Mouth part 2... Protective film 3... Outlet stopper 31... Outlet stopper body 31a... Flange 31b131c131d - Annular protrusion 32... Inner stopper 32a... Blade part 33.
...Cap 4...Hot melt 5...
heater

Claims (2)

[Claims] (1) In a spout plug body that has a flange at the bottom, hot melt is applied to the bottom side of the flange, and is adhered to the mouth of a paper container covered with a synthetic resin layer, the bottom surface of the flange is A paper container with a spout stopper, characterized in that annular projections are provided on the inner and outer edges of the sides. (2) applying hot melt between the annular protrusions with the bottom surface of the flange of the spout plug body facing upward;
A method for manufacturing a paper container with a spout stopper, which comprises holding the mouth of the paper container horizontally, inverting the spout plug body, and adhering the lower surface side of the flange to the spout. .