JPS5937496Y2 - beverage container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a beverage container, and particularly to a beverage container provided with an easy-to-open lid.

Conventionally, in order to store drinks such as yogurt, the upper opening of the main body a, which is made of paper whose inner surface is coated with polyethylene and is formed into a truncated conical shape with a flat top as shown in Fig. 1, is sealed. It is known that a sheet-like lid is attached, a straw insertion hole IIc is bored, and a cover paper d is pasted so as to cover this insertion opening C.

This container was well received for its stability when the contents were stored, with the center of gravity located at the bottom, and for its innovative design.

However, this container requires a straw for drinking, which must be prepared separately.

The present invention takes advantage of the features of the truncated conical container mentioned above, but also improves the shape of the container so that it can be consumed without a straw.It also uses a special lid material, which will be described later, to make it easy to open. It has been made possible.

Next, a description will be given based on FIGS. 2 to 4.

The container body A of the present invention is formed into a truncated cone shape using paper coated with an inner surface 1 and a Ni-polyethylene coat 1 as a base material, and the upper opening edge is opened outwards to form an inversely tapered heat-sealed part 2. Form.

As shown in FIG. 3, the lid material B includes a polyethylene coating layer 4 on the bottom surface of an aluminum foil 3, and a porous paper layer 5 with weak cohesive force.
(for example, thin paper, high quality paper, glassine paper) and a hot melt adhesive layer 6 (for example, a hot melt adhesive mainly composed of wax and ethylene-vinyl acetate copolymer) are laminated in this order.

This lid material B is heated and pressurized by a known bonding technique to be thermally bonded to the inner surface of the heat-sealed portion 2 of the container body A.

At this time, the hot-melt adhesive layer 6 is firmly adhered to the polyethylene coating layer 1 on the inner surface of the heat-sealed portion 2, and the contents will not leak therefrom.

As described above, in the container of the present invention, the lid material B is thermally bonded to the inner surface of the heat sealing part 2 of the container body A, and the inside of the hot melt adhesive layer 6 of the lid material B has a cohesive force. A weak porous paper layer 5 is laminated.

Therefore, when lid material B is pulled up when opening, lid material B
Since stress is applied to the portion of the container body A that is thermally bonded to the heat sealing portion 2, the porous paper layer 5, which has a weak cohesive force, breaks at this portion, and the lid material B is thereby unsealed.

The hot melt adhesive layer 6 of this PM J lid material B is given a strong supporting force by being heated and pressurized, and since it does not have supporting capacity by itself and does not have film properties, The hot melt adhesive layer 6 is cut with extremely weak force in the part of the main body A that is not supported by the heat sealing part 2, that is, the part that is not thermally bonded, and the hot melt adhesive layer 6 seals the opening of the container main body. It does not remain as it is (see Figure 4).

Examples are shown below to further clarify the structure of the present invention.

(Example) Printing was performed on the outer surface of 250 g/m2 cardboard, and 6
Coated with 0μ polyethylene, inner surface coated with 60μ
The base material is coated with polyethylene.
The upper opening is 20mm, and the diameter of the lower opening is 50mm.
A bottom plate was formed from 80 g/m2 cardboard coated with 60 μm of polyethylene on both sides, and this was adhered to the circumferential surface of the lower opening of the truncated cone to form the container body.

The periphery of the upper opening was expanded outward by about 15 degrees with respect to the vertical to form an inversely tapered heat-sealed portion with a height of 1.5 mm.

On the other hand, the top surface of a 40 μm thick aluminum foil was printed, the bottom surface was coated with a primer, and then a 20 g/m 2 thin paper mount was extruded and laminated to form a 30 μm polyethylene film.

Next, a lid material was prepared by coating the lower surface of the thin paper mount with a hot melt agent mainly composed of wax and ethylene-vinyl acetate copolymer to a thickness of 25 μm.

After storing water in the container body, the lid material was thermally bonded to the heat-sealed portion of the container body using a heat sealing machine under the conditions of 120° C., 5 kg/c♂, and 1 second.

This container costs about 100. Although the container was transported by truck over a distance of 1 km, the sealing performance was not impaired in any way, and when the container was opened afterwards, it was easily peeled off by hand.

When the open part was examined, the thin paper backing paper was broken.

As mentioned above, the container of the present invention has good stability, and since the opening of the container is tapered in reverse and that part is a heat-sealed part, when internal pressure is applied, the force that tries to peel off the lid is reduced. , acts in the shear direction of the sealing part, so even if there is a layer with weak cohesive force on the lid, there is no risk of the lid peeling off.On the other hand, when opening the seal, if you pull it in a direction perpendicular to the reverse tapered sealing part, It has the advantage that it can be easily opened starting from the layer with weak cohesive force, and can be drunk without preparing a straw.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional container, FIG. 2 is a sectional view of the container of the present invention, FIG. 3 is a partially enlarged sectional view of the lid, and FIG. 4 is an enlarged sectional view of a broken portion. A... Container body, B... Lid material, 1...
...Polyethylene coat layer, 2 ... Heat sealing part, 3 ... Aluminum foil, 4 ... Polyethylene coat layer, 5 ... Porous paper layer, 6.
...Hot melt adhesive layer.

Claims (1)

[Scope of utility model registration request] The container body is made of paper coated with polyethylene on the inner surface, formed into a truncated cone shape, and the periphery of the upper opening is expanded slightly outward to form an inversely tapered heat-sealed part, and the lower surface of the aluminum foil is coated with polyethylene. A beverage container consisting of a coating layer, a fracture layer made from a porous paper layer with weak cohesive force, and a lid material laminated in this order with a hot melt adhesive layer, and the lid material is thermally welded to the heat sealing part of the container body. container.