JP2527392Y2 - Liquid container - Google Patents

Description

[Detailed description of the invention]

[Industrial applications]

The present invention relates to a liquid container, and more particularly, to a gobel-top type liquid container comprising a multi-layer sheet.

[Prior art field]

2. Description of the Related Art As a container for filling a liquid beverage, a liquid container in which one blank sheet is bent and formed, and heat-sealed to form an adhesive is widely used. In particular, the use of goebel top type liquid containers is remarkable. These liquid containers are molded using a multi-layered sheet made of paper, polyethylene, polyethylene terephthalate, aluminum, etc., but containers that can be used to fill milk and the like are specified by the Ministry of Health and Welfare from the viewpoint of food hygiene. In some cases, strong polyethylene terephthalate cannot be used.

[Problems to be Solved by the Invention] There is a drawback that it is not easy to open a liquid container of a gobel-top type which has been widely spread. As is well known, the opening of the govel-top type liquid container has one end of the roof type folded into a V-shape and the adjacent portion is bonded and sealed, so that the opening is required to open the opening. It is necessary to push and expand the sealing portion folded in the shape of a letter, make the sealing portion once flat, and then peel off the multilayer component sheet that is stacked from the near side. Therefore, considerable force is required to open the opening, and children with weak power often cannot open the opening. As described above, the conventional milk container using the laminated constitution sheet in which the paper layer is extrusion-coated with polyethylene has a problem that the strength is insufficient and a problem that the opening is difficult. Therefore, it has been desired to devise a Goebel top type liquid container which can maintain sufficient strength even as a large milk container and has an easy opening.

[Means for Solving the Problems]

The present invention has been made to solve the above-mentioned problems of the prior art, in which paper is used as a main constituent sheet, and stretched polyethylene and aluminum foil are arranged in this order at a position on the liquid level side of paper at the time of container molding. In a Goebeltop-type liquid container, which is formed by a multi-layer sheet covered with unstretched polyethylene on both sides and is formed by opening a sticking portion folded at the top of the container, an opening is formed. The present invention provides a Goebel top type liquid container in which the direction in which the stretching ratio is large coincides with the circumferential direction of the container body. Note that stretched polyethylene is polyethylene in which molecules are mechanically stretched in one or two directions at a temperature equal to or lower than the melting point (hereinafter referred to as stretching) and molecules are oriented in parallel with the stretching direction. And polyethylene whose molecules are not oriented in a specific direction. The stretched polyethylene has a remarkable increase in tensile strength as compared with unstretched polyethylene, but the strength in the direction perpendicular to the stretching direction is rather reduced, and therefore it is easy to tear parallel to the stretching direction. There are features.

【Example】

In the figure, reference numeral 1 denotes a gobel-top type liquid container of the present invention comprising a multi-layer sheet 2. The multilayer component sheet 2 is a multilayer component sheet having thick paper 21 as a main component sheet and both sides covered with unstretched polyethylenes 22a and 22b. Polyethylene 23 and aluminum foil 24 are arranged, paper 21 and aluminum foil 24 are adhered by non-oriented polyethylene 22c, aluminum foil 24 and biaxially oriented polyethylene 23 are adhered by adhesive 25, and biaxially oriented polyethylene The unstretched polyethylene 23b and the unstretched polyethylene 22b are bonded and integrated by the unstretched polyethylene 22d. The liquid container 1 of the Gabel top type formed by heat-sealing with the multi-layered sheet 2 having the above-described configuration in which the stretching direction of the biaxially stretched polyethylene 23 is oriented in the circumferential direction and the vertical direction of the body 11 of the liquid container 1, The strength was improved by about 50% or more as compared with a conventional liquid container formed of only undrawn polyethylene without using biaxially stretched polyethylene 23, and was almost the same level as a liquid container using polyethylene terephthalate. Reference numeral 1a denotes a Goebel top type liquid container of the present invention, which comprises a multilayered sheet 2a using a so-called uniaxially stretched polyethylene 23a which is stretched in one direction instead of the biaxially stretched polyethylene 23. Uniaxially stretched polyethylene 23a is the body 1
1 is provided so that the stretching direction coincides with the circumferential direction. The strength of the Goebel top type liquid container 1a formed by the multi-layer constitution sheet 2a is improved by about 10% as compared with the conventional liquid container using undrawn polyethylene instead of the uniaxially drawn polyethylene 23a, and the liquid using polyethylene terephthalate is improved. A level of strength close to that of the container was obtained. The opening 12 of the liquid container 1a has a structure in which one end of the roof type is pushed open, a nail is hooked on the sticking portion 12a of the multi-layered sheet 2a, and a V-shaped folded portion is pulled out and opened. Since the stretched polyethylene 23a matches the stretch direction with the circumferential direction of the body 11 of the container 1a, the tensile strength in the circumferential direction of the body is high, but it has the property of easily breaking in the vertical direction, and therefore has an arrow. If the front multilayer component sheet 2a is pulled in this direction, the multilayer component sheet 2a is peeled off from the sticking portion 12a to the paper 21 of the other multilayer component sheet 2a and can be easily opened. Therefore, the thick paper 21 breaks in the vertical direction as if the layers were separated, and the opening advances. When the uniaxially stretched polyethylene 23a is used as described above, the opening becomes much easier as compared with a conventional liquid container using unstretched polyethylene. Note that the liquid container according to the present invention may be one in which aluminum foil is omitted when tight sealing is not required, or a liquid container using a multi-layered sheet to which another material is added depending on the use.

[Effect of the invention]

As described above, the Goebel top type liquid container of the present invention is a liquid container composed of a multi-layered sheet, the strength of which is increased by the inherent stretched polyethylene, and the use of stretched polyethylene makes the opening extremely easy. Become. Further, by heat-sealing the unstretched polyethylenes disposed on both sides, it is possible to efficiently manufacture a liquid container as in the conventional case.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a liquid container according to the present invention, FIGS. 2 and 3 are cross-sectional views of a multilayer sheet, FIGS. 4 and 5 are explanatory views of an opening, and FIG. It is an enlarged view of the principal part A of FIG. 1 ... liquid container, 11 ... trunk, 12 ... opening, 12a ...
Attachment part, 2 ... Multi-layer sheet, 21 ... Paper, 22 (a, b, c,
d) Unstretched polyethylene, 23 biaxially stretched polyethylene, 23a uniaxially stretched polyethylene, 24 aluminum foil, 25 adhesive.

Continuation of the front page (56) References JP-A-62-208349 (JP, A) JP-A-62-38150 (JP, U) JP-A-62-132923 (JP, U) JP-A-58-60443 (JP, U) , U) Japanese Utility Model Showa 58-119566 (JP, U) Japanese Utility Model Showa 61-158420 (JP, U)

Claims (3)

(57) [Scope of request for utility model registration] 1. A multilayer comprising paper as a main constituent sheet, a stretched polyethylene and an aluminum foil in this order at a position on the liquid surface side of the paper at the time of molding the container, and both sides are coated with unstretched polyethylene. A gobel-top liquid container in which an opening is formed by pulling out a sticking portion folded at the top of the container, the direction in which the stretch ratio of the stretched polyethylene is large, and the direction of the container body is A göbeltop-type liquid container, which coincides with a circumferential direction. 2. The liquid container according to claim 1, wherein the drawn polyethylene is biaxially drawn polyethylene. 3. The liquid container according to claim 1, wherein the drawn polyethylene is uniaxially drawn polyethylene.