JPS636026Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention relates to a paper-based sealed container.

Metal cans have conventionally been common as sealed containers for beverages such as G-Us, and the opening is equipped with a so-called easy opener. However, since metal cans cannot be incinerated, they are difficult to dispose of after use, resulting in so-called can pollution. Therefore, paper-based sealed containers have recently begun to appear, but in order to form an opening for the drinking spout, an aluminum plate with thermoplastic synthetic resin layers on the top and bottom surfaces is used for the top wall. An oval opening was pre-drilled in the top wall, and to cover this, a short tape-shaped aluminum foil with a hot-melt layer on the underside was heat-sealed to the top surface of the top wall, with one end left as a grip. The peripheral edge of the cylinder is bent into an inverted U-shape in cross section, fitted over the upper end of the trunk wall, and heat-sealed. However, since the opening of each type is simply a cutout of the top wall, there is a problem in that it is difficult to drink the contents.

The purpose of this invention is to provide a paper-based sealed container that has an easy-to-drink mouth when opened, has excellent shape retention and airtightness, and is inexpensive.

Means for Solving the Problems In order to achieve the above objectives, the paper-based sealed container of this invention is made up of a polyethylene layer, a paper-based layer, a polyethylene layer as an adhesive, an aluminum foil layer, and a polyethylene layer in order from the outside. It is equipped with a trunk wall that is integrally constructed, a top wall that has the same structure as the trunk wall, and a polyethylene annular connecting frame that connects the trunk wall and the top wall. A vertical part fixed to the inner surface, a horizontal inner edge part provided inside the lower end of the vertical part and fixed to the lower surface of the peripheral edge of the top wall, and a horizontal inner edge part provided outside the upper end of the vertical part and abutting the upper surface of the trunk wall. with the abutted horizontal outer edge,
A through hole is drilled at a predetermined position in the top wall, a polyethylene layer is formed on the inner peripheral surface of the hole, and a short polyethylene tube with a ceiling is attached to the upper surface of the peripheral edge of the through hole by a horizontal outer edge provided at its lower end. fixed,
An annular thin wall portion for breaking is formed at the upper end of the short tube,
The base of the knob is integrated into one end of the upper surface of the ceiling.

An embodiment of this invention will be described below with reference to the drawings.

The paper-based sealed container comprises, from the outside, a polyethylene layer 1, a paper-based layer 2, a polyethylene layer 3 as an adhesive, an aluminum foil layer 4, and a polyethylene layer 5, which are integrally formed into a body wall 6, a top wall 7 having the same structure as the body wall 6, an aluminum bottom wall 8 having a polyethylene layer 25 on its upper surface, and a polyethylene annular connecting frame 10 which connects the body wall 6 and the top wall 7.
and a polyethylene annular connecting frame 11 connecting the body wall 6 and the bottom wall 8.

The upper annular connecting frame 10 includes a vertical portion 14 fixed to the inner surface of the upper end of the body wall 6, and a horizontal inner edge portion 13 provided inside the lower end of the vertical portion 14 and fixed to the lower surface of the peripheral edge of the top wall 7. , and a horizontal outer edge portion 15 provided outside the upper end of the vertical portion 14 and in contact with the upper surface of the trunk wall 6.

A through hole 26 is drilled at a predetermined position in the top wall 7, and a short polyethylene tube 9 having a cross section of the same shape and a ceiling 19 is attached to the periphery of the through hole 26 by a horizontal outer edge 9b provided at its lower end. An annular thin-walled portion 1 for breaking is attached to the top surface of the short tube 9 and attached to the ceiling 19 of the short tube 9.
6 is formed by a V-groove 17, and a base 18a of a knob 18 is integrally provided at one end of the upper surface of the ceiling 19, that is, close to a part of the pointed end of the annular thin wall portion 16 and inside thereof. . At pick 18,
A finger hole 24 is provided. A polyethylene layer 12 is formed on the inner surface of the through hole 26 . The short tube 9 has a tongue-like shape that tapers toward the center of the top wall 7 when viewed from above.

The lower annular connecting frame 11 includes a vertical portion 22 fixed to the inner surface of the lower end of the body wall 6, and a horizontal inner edge portion 20 provided inside the upper end of the vertical portion 22 and fixed to the upper surface of the peripheral edge of the bottom wall 8. , and a horizontal outer edge portion 23 provided outside the upper end of the vertical portion 22 and in contact with the lower surface of the trunk wall 6.

Top wall 7 and bottom wall 8 and their respective connecting frames 1
0 and 11 are integrally molded at the same time, and the connecting frames 10 and 11 are fused to the body wall 6 by high frequency heating. The horizontal outer edge 9b of the short tube 9 is fixed to the top wall 7 using ultrasonic waves before the upper connecting frame 10 is fused to the trunk wall 6.

The trunk wall 6 is made by first bending a single laminate into a cylindrical shape, overlapping both edges, and fusing them together by high-frequency heating. FIG. 3 shows how the two edges are joined. That is, a portion of the polyethylene layer 1 and the paper layer 2 on the inner edge of both overlapping edges are removed, and the polyethylene layer 3, which is the adhesive layer, exposed as a result of the removal,
It is fused to the inner polyethylene layer 5 of the outer edge.

To open a sealed container, pull the knob 18 diagonally upwards toward the outside of the sealed container.
The ceiling 19 is removed together with the knob 18 by breaking away from the annular thin-walled portion 16, as shown in dashed lines in FIG. 2, to obtain a drinking spout.

Note that the annular thin wall portion may be formed at the upper part of the peripheral wall of the short tube.

Effects of the invention As mentioned above, the paper-based sealed container according to this invention has both its body wall and top wall made up of a polyethylene layer, a paper-based layer, a polyethylene layer as an adhesive, an aluminum foil layer, and a polyethylene layer in order from the outside. Since it is integrally constructed, the presence of an aluminum foil layer forms a gas barrier layer within the wall, resulting in good airtightness, and the presence of inner and outer polyethylene layers allows it to be made mainly of paper. Nevertheless, the walls themselves are protected from moisture and are impermeable to liquids. Further, the trunk wall and the top wall are connected by an annular connecting frame, and the annular connecting frame includes a vertical part fixed to the inner surface of the upper end of the trunk wall, and a vertical part provided inside the lower end of the vertical part and the top wall. It consists of a horizontal inner edge fixed to the lower surface of the peripheral edge of the wall, and a horizontal outer edge provided outside the upper end of the vertical section and in contact with the upper surface of the trunk wall, so that the top wall and the trunk wall are Not only is the connection reliable, but the upper end of the body wall is made hard and durable by the presence of the connecting frame, so it has sufficient shape retention even though it is a paper-based sealed container. Furthermore, since the connecting frame is made of polyethylene and a polyethylene layer is present on the inner surface of the trunk wall and the lower surface of the top wall, the three parts can be reliably and easily fused together. Further, since the multilayer end face, which is the upper surface of the trunk wall, is covered by the horizontal outer edge of the connecting frame, it is protected thereby and has a good appearance.

In addition, a through hole is drilled at a predetermined position in the top wall, and a short tube having a ceiling is fixed to the upper surface of the peripheral edge of the through hole by a horizontal outer edge provided at the lower end of the short tube. Since the thin part is formed and the base of the knob is integrally provided at one end of the upper surface of the ceiling, the seal is maintained completely without any opening before opening, but when opening, If you strongly pull it diagonally upward, it will break from the annular thin wall part and the ceiling will be removed along with the knob, allowing you to easily obtain the drinking spout. Moreover, since the short tube itself remains on the top wall, it becomes a protruding drinking spout, making it easy to drink and pour when transferring the contents to another container. Further, since the horizontal outer edge portion exists at the lower end of the short tube, the short tube is made of polyethylene, and the polyethylene layer is present on the upper surface of the top wall, the two can be reliably and easily fused. Furthermore, since the polyethylene layer is formed on the inner circumferential surface of the through hole, there is no risk of liquid penetrating into the paper main layer of the top wall from the inner circumferential surface.

Furthermore, the top wall is mainly made of paper, and unlike conventional paper-based containers, an aluminum plate is not used for the top wall, so there is an advantage that the manufacturing cost of the paper-based container is low.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Fig. 1 is a plan view with each layer partially removed from above, Fig. 2 is a sectional view taken along the - line in Fig. 1, and Fig. 3 is a cross-sectional view taken along the - line in Fig. 1.
It is an enlarged sectional view taken along the - line in the figure. 1, 3, 5, 12... polyethylene layer, 2...
Paper main layer, 4... Aluminum foil layer, 6... Trunk wall, 7... Top wall, 9... Short tube, 9b... Horizontal outer edge of short tube, 10... Polyethylene annular connecting frame,
13...Horizontal inner edge part, 14...Vertical part, 15...
Horizontal outer edge portion, 16... Annular thin-walled portion for breaking, 18...
...Knob, 18a...Base of knob, 19...Ceiling,
26...Through hole.

Claims (1)

[Scope of utility model registration request] Sequentially from the outside: polyethylene layer 1, paper main layer 2,
A trunk wall 6 integrally composed of a polyethylene layer 3 as an adhesive, an aluminum foil layer 4, and a polyethylene layer 5, a top wall 7 having the same structure as the trunk wall 6, and a trunk wall 6 and top wall 7 are connected. The annular connecting frame 10 is equipped with a polyethylene annular connecting frame 10.
is a vertical portion 14 fixed to the inner surface of the upper end of the trunk wall 6.
and the top wall 7 provided inside the lower end of the vertical portion 14.
a horizontal inner edge portion 13 fixed to the lower surface of the peripheral edge of the
It consists of a horizontal outer edge part 15 provided on the outer side of the upper end of the vertical part 14 and in contact with the upper surface of the trunk wall 6, and a through hole is made at a predetermined position in the top wall 7, and a polyethylene layer 12 is formed on the inner peripheral surface of the horizontal outer edge part 15. A short tube 9 made of polyethylene and having a ceiling 19 is fixed to the upper surface of the peripheral edge of the through hole by a horizontal outer edge 9b provided at its lower end, and an annular thin-walled portion for breaking is attached to the upper end of the short tube 9. 17, and a base 18a of a knob 18 is integrally provided at one end of the upper surface of a ceiling 19.