JPS6328105Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement in the stopper attachment part of a liquid paper container with a stopper.

[Conventional technology]

For example, a liquid paper container 1 with a roof-shaped top as shown in FIG. 1 and a stopper 2 serving as a pouring spout has been conventionally known. An opening 4 is formed in a cardboard 3 coated with a water-resistant coating, and a stopper 2 is attached to the outer surface of the opening 4, and a sealing member 5 is attached to the inner surface of the opening 4, so that the opening 4 is adhered to the outer surface of the cardboard 3. However, in this case, since the sealing member 5 is bonded with adhesive 6 to the peripheral edge of the opening 4 made in the cardboard 3 of the container, the adhesive on the end surface of the sealing portion is applied to the liquid contained in the container 1. Not only was it unhygienic, but there was also the risk of contamination and leakage due to incomplete adhesion.

〔the purpose〕

The present invention improves these conventional drawbacks and
Eliminating the need to adhere a sealing member to the inner surface of the stopper attachment part with adhesive, the adhesive and contents do not come into direct contact with each other, making the container sanitary and having excellent preservability with no fear of liquid leakage. That's what you're trying to get.

〔composition〕

The present invention was devised to achieve the above-mentioned object, and is directed to a liquid paper container with a stopper formed using cardboard with a water-resistant coating layer such as a metal film or resin layer on the inner surface and a resin layer laminated on the outer surface. , the cardboard at the opening corresponding to the hole of the mounting plug is removed, and the resin layer on the outer surface is brought into close contact with the waterproof coating layer on the inner surface at that part.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

Figure 3 is a cross-sectional view of the stopper attachment part of the liquid paper container with a stopper according to the present invention, in which an opening 4 is previously opened in the container cardboard 3, and a polyethylene
PE, aluminum Al, and polyethylene PE are laminated and adhered, the outer surface is coated with polyethylene PE, and a stopper 2 is adhered at a position corresponding to the opening 4 to form the stopper portion of the paper container. As a result, the entire inside of the paper container, including the part where the stopper is attached, is covered with a laminated film of polyethylene, aluminum, and polyethylene, which prevents the sealing member adhesive from being exposed and peeling off as in the conventional example shown in Figure 2. It is possible to prevent the occurrence of defects due to fear etc.

An example of the manufacturing process for a paper container equipped with the stopper attachment part shown in FIG. 3 will be described as follows.

Print on cardboard and punch out opening 4 Polyethylene, cardboard, polyethylene, aluminum, laminate of polyethylene, fold lines to make paper containers, punch out to carton size, container assembly, stopper attachment, contents storage, sealing , [Effects] Paper containers, which are relatively robust, lightweight, and inexpensive, have been used to store alcoholic beverages, juices, etc., and by attaching a stopper to them, it is easy to drain the liquid contents. However, according to the present invention, the inner surface of the paper container at the stopper attachment opening 4 is seamlessly covered with a water-resistant film layer laminated over the entire inner surface of the container. There is no need to bond another sealing member 5 with adhesive as shown in FIG.
There is no problem such as unhygienic problems caused by the contents coming into contact with the adhesive, and there is no fear of liquid leakage due to poor adhesion, resulting in excellent preservability and easy manufacture. Furthermore, when discharging the contents, opening the stopper and tearing the water-resistant coating layer (laminate layer) pasted on the opening 4 can be easily done because the coating layer is made thin; If the strength of the coating layer is too weak, it can be easily reinforced by adjusting the strength of the portion of the polyethylene PE covering the outer surface of the cardboard 3 that is in contact with the opening 4.

Moreover, especially according to the present invention, the cardboard is removed at the opening and the outer resin layer (polyethylene
PE) is in close contact with the inner water-resistant coating layer, so
When the stopper is opened and the laminate layer at the opening is torn, cardboard 3 is placed around the opening 4, covered by the resin layer.
Since the edges of the container are not exposed, the liquid will not seep into the cardboard even after drinking begins, making it possible to provide an extremely hygienic and excellent container.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a container with a roof-type top shown as an example of a liquid paper container with a stopper; FIG. 2 is a sectional view of the stopper portion in FIG. 1, showing a conventional example;
FIG. 3 is a cross-sectional view similar to FIG. 2 according to the present invention. 1... Liquid paper container with stopper, 2... Stopper, 3... Cardboard, 4... Opening, 5... Sealing member, 6... Adhesive, PE... Polyethylene, Al... Aluminum.

Claims (1)

[Scope of utility model registration request] In a liquid paper container with a stopper formed using cardboard with a water-resistant coating layer such as a metal film or resin layer on the inner surface and a resin layer laminated on the outer surface, remove the cardboard at the opening corresponding to the hole of the mounting stopper, and A liquid paper container with a stopper, characterized in that an outer resin layer is in close contact with an inner water-resistant coating layer.