JP2627345B2 - Sealed container - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealed container particularly suitable for use in storing semi-solid contents such as ointments and cosmetic creams.

2. Description of the Related Art Some ointments and cosmetic creams may be discolored or deteriorated unless stored in a sealed container. Good airtightness must be maintained over a long storage period until opening, and further, there is a demand for a device that does not require a special opening tool when opening.

Conventionally, as such a sealed container, a container made of a stable synthetic resin such as polypropylene or high-density polyethylene or a synthetic resin screw cap is combined with a container body made of glass or the like. In addition, a packing made of a low-hardness elastic material such as high-foam polyethylene is mounted on the inner surface of the cap.
When using a foam as the packing material, to prevent the packing itself from being impregnated with the contents,
In many cases, non-porous plastic films such as polypropylene are laminated on both sides of the packing, or coated with vinyl acetate or the like.

Problems to be Solved by the Invention According to such a conventional technique, there is a problem that the airtightness for a long period is still insufficient. That is, in general, packing materials that can be used in these applications exhibit creep properties against compressive stress. However, there is a risk that the contents may be broken and the contents may be altered.

Therefore, an object of the present invention is to provide a good airtightness over a long period of time by interposing a sealant at a contact portion between the peripheral edge of the opening of the container body and the packing in view of the problem of the related art. It is to provide a sealed container that can be held.

Means for Solving the Problems The configuration of the present invention for achieving the object includes a container body, a cap for closing an opening of the container body, and a packing made of a foamable sheet material attached to the inner surface of the cap. And a viscous sealant interposed at a contact portion between the peripheral edge of the opening and the packing.

Note that a continuous edge, a continuous ridge, or a continuous groove can be formed at the peripheral edge of the opening.

According to the structure of the present invention, the container body can be hermetically sealed via the packing by the cap, but at this time, the contact portion between the peripheral edge of the opening of the container body and the packing has a viscosity. Since the dense sealing agent is interposed, even if creep occurs in the packing over time, the airtightness of the container body is not easily destroyed.

When a continuous edge is formed at the peripheral edge of the opening of the container body, the edge can penetrate the packing by attaching the cap, and the airtightness can be further improved. The same is true for forming a continuous ridge on the peripheral edge of the opening.

By forming a continuous groove on the peripheral edge of the opening, a sealing agent can be retained in this groove, so that even when the cap is repeatedly opened and closed, good airtightness can be easily reproduced. be able to.

Embodiments Hereinafter, embodiments will be described with reference to the drawings.

The sealed container includes a container main body 10, a cap 20 for closing the opening 11 of the container main body 10, and a packing 31 mounted on the inner surface of the cap 20 (FIGS. 1 and 2).

The container body 10 has a wide-opening portion 11 having an external thread 11a formed on the outer periphery, and polypropylene, high-density polyethylene,
It is integrally formed from a material such as glass. A continuous edge portion 11b is formed at a peripheral edge of the opening portion 11, and the outer side of the edge portion 11b is formed on a slope 11c.

The cap 20 is a screw-type cap with a female screw 20a that is screwed into the male screw 11a, and a non-slip knurl 20b is formed on the outer periphery. The cap 20 can be integrally molded from a synthetic resin material such as polypropylene and high-density polyethylene.

The packing 31 is mounted on the inner surface of the cap 20. The packing 31 is preferably formed by laminating a non-porous film such as polypropylene (not shown) on both sides of a foamable sheet material such as foamed polyethylene having appropriate hardness and elasticity.

A viscous sealant 31a is applied to the lower surface of the packing 31. As the sealant 31a, waxes that do not react with the contents contained in the container body 10 can be used. That is, the sealant 31a is a simple substance or a mixture of petroleum wax, vegetable wax, animal wax, modified wax, and the like, and may further contain a suitable adhesive or antioxidant, etc. Compounds that do not soften or solidify to the extent that they hang down at normal storage temperatures and that maintain an appropriate consistency are used.

Such a sealed container, after filling the contents, the cap 20
2 (FIG. 2), the container body 10 can be sealed such that the peripheral edge of the opening 11 of the container body 10 is slightly bitten into the packing 31 by the edge 11b. At this time, since the sealing agent 31a applied to the lower surface of the packing 31 is interposed at the contact portion between the peripheral edge of the opening 11 and the packing 31, the packing 31 is creeped by the packing 31.
Even if the contact pressure with the container body 10 decreases, the hermeticity of the container body 10 is not destroyed, so that good hermeticity can be maintained for a long period of time.

In addition, regardless of FIG.
It is sufficient to apply a ring-shaped coating only on the contact portion between the packing 31 and the peripheral edge of the opening 11 instead of the entire lower surface of 1. Further, the sealing agent 31a is preferably applied to the container body 10 immediately before the cap 20 is attached by filling the container body 10 with the contents.

Another embodiment The container main body 10 has a continuous ridge 11 d on the peripheral edge of the opening 11.
Can be formed (FIG. 3). Since the ridges 11d bite into the packing 31 when the cap 20 is attached, good airtightness retention performance can be realized as in the previous embodiment. The ridge 11d may be formed by smoothly bulging the peripheral edge of the opening 11 upward (fourth step).
Figure).

The container body 10 has a continuous concave groove 11 at the peripheral edge of the opening 11.
e may be formed (FIGS. 5 and 6). Sealant 31a
Is replaced with a groove 11e instead of being applied to the lower surface of the packing 31.
Can be held. The peripheral edge of the opening 11 is a concave groove
Since the packing 31 is pressed on both sides of 11e, good airtightness can be reproduced even if the cap 20 is repeatedly opened and closed.

The sealant 31a is formed on the lower surface of the packing 31 in a ring shape.
Is applied, the coating thickness may be made non-uniform, and the central portion may be made thicker (FIG. 7) or both sides may be made thicker (FIG. 8).

In addition, the present invention is sufficiently applicable not only to the screw type cap 20 but also to a cap which is mounted using a suitable snap action type fastener.

Effects of the Invention As described above, according to the present invention, time is saved by interposing a viscous sealant at the contact portion between the peripheral edge of the opening of the container body and the packing attached to the inner surface of the cap. Over time, the packing will creep,
Even if the contact pressure against the packing decreases, the hermeticity is not easily destroyed by the sealant, so that there is an excellent effect that good hermeticity can be maintained for a long period of time.

[Brief description of the drawings]

1 and 2 show an embodiment, FIG. 1 is an explanatory view of the entire structure, and FIG. 2 is an enlarged sectional view of a main part of FIG. FIG. 3 and FIG. 4 are enlarged views of main parts corresponding to FIG. 2 showing different embodiments. 5 and 6 show another embodiment, FIG. 5 is a perspective view of a main part, and FIG. 6 is a diagram corresponding to FIG. FIG. 7 and FIG. 8 are enlarged cross-sectional views of essential parts showing still another embodiment. 10 Container main body 11 Opening 11b Edge 11c Slope 11d Convex ridge 11e Groove 20 Cap 31 Packing 31a Sealant

Claims (4)

(57) [Claims] 1. A container body, a cap for closing an opening of the container body, a packing made of a foamable sheet material attached to an inner surface of the cap, and a peripheral edge of the opening and the packing. A sealed container comprising a viscous sealant interposed in the contact portion. 2. The sealed container according to claim 1, wherein a continuous edge portion is formed at a peripheral edge of said opening portion with an outer slope formed. 3. The sealed container according to claim 1, wherein a continuous ridge is formed on a peripheral edge of said opening. 4. The sealed container according to claim 1, wherein a continuous groove is formed at a peripheral edge of said opening.