JPS61287570A - Sealed package - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a sealed package, particularly for beverages, liquid foods, solid foods that are reconstituted with water or hot water, etc., when the container is directly touched after opening. It is suitable for packaging for food and drink.

[Background Art and Problems Therein] Various Containers 1 For example, sealed packaging bodies are widely known in which a container made of synthetic resin formed by injection molding or thermoforming is filled with a beverage, food, etc., and then a lid material is heat-sealed. There is.

For example, as shown in FIG. 8, a flange-shaped welded surface 32 is formed horizontally on the outer periphery of the opening of the container 31, that is, parallel to the opening surface of the container 31, and a drop-lid type lid material is attached to this flange-shaped welded surface 32. 33 is heat-sealed to make it easy to open, or as shown in FIG. 9, a curl 42 is formed at the opening and outer periphery of the container 41, and a flat sheet 43 is heat-sealed to this curl 42. Things, etc. are known.

Generally, the welded surface of these packages is parallel to the opening surface of the container, so although this does not pose a particular problem for solid foods, it is difficult to eat beverages, liquid foods, or reconstitute them with water or hot water. This is not necessarily satisfactory for products such as solid food packages, which are eaten by touching the container directly after opening the lid.

In other words, ■Since the side wall of the container and the welding surface are approximately at right angles, it is difficult to put it in the mouth, and the peeled part □ hits the lips, resulting in poor mouthfeel.■
In addition, liquid tends to spill. Normally, heat sealing involves heat sealing a pedestal that supports the container horizontally and a heating device with a flat crimp end surface.
In the case of curled containers, the curls are deformed due to pressure bonding, which not only reduces the functional effect but also reduces the design effect, and there are many disadvantages.

[Object of the Invention] An object of the present invention is to eliminate such drawbacks and to provide a sealed package with excellent sealing effect and design effect.

[Means and effects for solving the problem 1 Therefore,
In the present invention, in a sealed package in which a lid material is welded to an opening of a container, a flange-like welded portion formed on the outer periphery of the opening of the container and welded to the lid material is inclined toward the inside of the container. , in the form of

As a result, the part where you directly touch your mouth when eating or drinking is slanted, so it is easy to take a bite, and it is well exposed to sunlight.
Since the liquid inside the container flows from the side wall of the container through the brim-shaped welded part, the liquid is unlikely to spill.

In addition, the slanted brim-shaped welded part makes it difficult for foreign matter to adhere to that part during sealing, thus improving sealing performance.Furthermore, even if the container is curled, the curled part will be deformed by pressure bonding. Therefore, the functional and design effects are not reduced.

[Example] FIG. 1 shows an embodiment of the sealed package of the present invention.

The hermetically sealed package has a cylindrical container l whose top opening gradually narrows toward the bottom, and a flange-shaped welded part 2 with a tapered surface that slopes inward of the container 1 is integrally formed on the outer periphery of the opening of the container 1. The outer peripheral edge 4 of a lid member 3 having an inverted trapezoidal cross section is heat-sealed to this brim-like welded portion 2.

As for the method of manufacturing these, first, the container 1 and the lid member 3 are manufactured separately, and then the welded portions of the two, that is, the flange-like welded portion 2 and the outer peripheral edge 4 are welded to each other. First, when manufacturing the container 1, for example, synthetic resin is used.

Synthetic resins containing inorganic fillers, multilayer materials of polyolefin, etc. and gas barrier resins (EVOH, etc.), multilayer materials of metal and resin, multilayer materials of paper and resin, etc. can be manufactured by injection molding, blow molding, or vacuum/air pressure heating. It can be manufactured by molding or the like. Further, for the lid material 3, a multilayer sheet of synthetic resin, a multilayer sheet of metal and resin, etc. can be used.

Here, the inclination angle θ of the brim-shaped welded portion 2 formed on the container 1
(Angle with respect to the opening surface of the container 1) is preferably in the range of 20 to 70'', preferably in the range of 30 to 60 degrees.If the inclination angle θ is larger than 706, the sealing performance will deteriorate; If it is smaller, it will create a step against the side wall of the container 1, which is unfavorable in terms of mouthfeel and liquid spillage.

In addition, in order to weld the flange-shaped welding part 2 of the container l and the outer peripheral edge 4 of the lid member 3, for example, as shown in FIG. After supporting the flange-shaped welded portion 2 and fitting the outer peripheral edge 4 of the lid member 3 onto the brim-shaped welded portion 2, a tapered crimp surface 13 having the same shape as the tapered receiving surface 12 is attached from these three sides. What is necessary is to lower the heating device 14 and heat-seal both the heat a 14 and the pedestal 11. During this heat sealing, since the brim-shaped welded portion 2 is in an inclined state, contaminants from the filled food etc. are difficult to adhere thereto, and the sealing performance is not impaired by the influence of contaminants. Moreover, since the lower end surface of the heating device 14 can be constructed so as not to come into contact with the unsealed portion of the lid material 3, that is, the central portion of the lid material 3, the unsealed portion will not be deformed or wrinkled due to heat, and the design effect will be impaired. It never happens.

In a package having such a structure, the part that is directly touched when eating or drinking is sloped, so it is easy to touch the mouth, and the mouth does not touch the seal peeling surface directly, giving a good taste.
Since the liquid in the container flows from the side wall of the container l through the brim-shaped welded part 2, there is an advantage that the liquid is hard to spill. Moreover, the liquid remaining in the flanged welded part 2 during or after eating and drinking flows down into the container 1, so that the outer surface of the container 1 is not contaminated.

Moreover, in the form of the product, the outer circumferential edge 4 of the lid material 3 is tapered outward toward one side, so that this density is 1.
Even when packages are stacked upward in multiple stages, they can be stacked without causing the loads to collapse.

In addition, in carrying out the present invention, the form of the sealed package is not limited to the above-mentioned embodiment, and may be, for example, the form shown in FIGS. 3 to 7.

In the one shown in FIG. 3, the central portion 5 of the lid 3 excluding the outer periphery 4 is recessed one step toward the inside of the container 1 to form a drop-lid type. In this way, the same effect as a normal drop lid can be achieved.

In the case shown in FIG. 4, a curl 6 is formed on the outer peripheral edge of the brim-like welded part 2 of the container 1. Even in this case, since heat sealing can be performed with the lid member 3 at the brim-like welded portion 2 excluding the curl 6, the curl is not deformed by pressure bonding, and the functional effect and the design effect of the curl are not impaired.

The one shown in FIG.
A burr 7 is formed which is folded back to the back side of the holder.

Forming such a burr 7 is convenient when refitting the lid member 3 after unsealing it from the container l.

In the case shown in FIG. 6, a semicircular recess 8 is formed along the circumferential direction at an intermediate position of the flange-like welded part 2 of the container l. Such a depression 8 can reduce the influence of foreign substances and improve sealing performance.

The container shown in FIG. 7 has a double structure consisting of an outer container IA and an inner container IB, and an atmosphere adjusting agent (oxygen scavenger, moisture absorbent, etc.) 9 is placed at the bottom of the outer container IA and inner container IB. It houses the. In this case, the inner container IB has functions as a gas permeable layer and a moisture permeable layer, and the outer container IA has functions as a gas barrier layer and a moisture proof layer.

In addition, the shape of the container is usually circular as described in the above embodiments, but it may be of any shape as required, such as an ellipse, a polygon, etc.

[Effects of the Invention] As described in Section 2 below, according to the present invention, the container has a good mouthfeel, is difficult to spill liquid, and even if the container is curled, the curled portion is not deformed by pressure bonding, and furthermore, the sealing effect is improved. It is also possible to provide a sealed package with excellent design effects.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view showing one embodiment of the present invention, Fig. 2 is a view showing a crimping device for heat sealing, and Figs. 3 to 7 are cross-sectional views showing other embodiments of the present invention. , FIG. 8, and FIG. 9 are sectional views showing conventional sealed packages, respectively. 1. IA, IB... Container, 2... Flange-shaped welded part, 3.
... Lid material, 4... Outer rim.

Claims (4)

[Claims] (1) In a sealed package in which a lid material is welded to the opening of a container, a flange-like welded portion formed on the outer periphery of the opening of the container and welded to the lid material is inclined inward of the container. A sealed package featuring: (2) The sealed package according to claim 1, wherein the container is made of synthetic resin. (3) A sealed package according to claim 1 or 2, characterized in that the flange-like welded portion has an inclination angle of 20 to 70 degrees with respect to the opening surface of the container. (4) A sealed package according to any one of claims 1 to 3, characterized in that the brim-like welded portion and the lid material are welded to have easy-to-open properties.