JP4999376B2 - Sealed container - Google Patents

Description

  The present invention relates to an airtight container for containing predetermined contents. In particular, the present invention relates to an improved sealing structure using an adhesive seal member.

Japanese Patent Application Laid-Open Nos. 2000-264356 and 2001-158456 disclose structures in which an opening of a liquid cosmetic container is sealed with a hermetic seal (safety seal, virgin seal).
JP 2000-264356 A JP 2001-158456 A

  The hermetic seal closes the opening formed in the upper part of the container, and it is necessary to securely seal the opening until the use of the lotion contained in the container is started. Conversely, a structure that can be peeled off relatively easily when used is ideal.

  However, it has been difficult to achieve both reliable sealing by hermetic sealing and ease of peeling. That is, if the adhesive strength (peeling strength) of the hermetic seal is increased so that contents such as skin lotion in the hermetic container do not leak, it becomes difficult to peel off, resulting in inconvenience. In particular, in the case of a cosmetic container, women often use it, and a structure that can easily peel off the hermetic seal is important.

  This invention is made | formed in view of the above situations, and it aims at providing the airtight container which has the adhesive seal | sticker structure which can make high airtightness and peelability compatible.

  In order to achieve the above object, a sealed container according to the present invention comprises: a container main body for storing contents; an opening for discharging the contents from the container main body to the outside; and the periphery of the opening And an adhesive seal member that adheres to the sealing region located at the top and closes the opening. And the said sealing area | region has a strong adhesion area | region with strong peeling strength with respect to the said adhesive seal member, and an adjustment area | region where peeling strength is weaker than the said strong adhesion area | region. Further, the strong adhesion region and the adjustment region are alternately formed along the outer edge of the sealing region.

  Furthermore, the cosmetic container according to the present invention includes a container main body portion that stores the cosmetic; an opening connected to the upper end of the container main body portion and discharging the cosmetic material from the container main body portion to the outside; An inner plug having a sealing region formed around the opening; and an adhesive seal member bonded to the sealing region of the inner plug and thereby blocking the opening. And the said sealing area | region has a strong adhesion area | region with strong peeling strength with respect to the said adhesive seal member, and an adjustment area | region where peeling strength is weaker than the said strong adhesion area | region. Further, the strong adhesion region and the adjustment region are alternately formed along the outer edge of the sealing region. The strong adhesion region has a smooth surface and includes a sharp tip-shaped region extending radially in the vicinity of the outer edge of the sealing region. Further, the adjustment region has fine irregularities formed on the surface, and is located between the adjacent projection-shaped regions.

  Here, the “smooth surface” can be said to be smoothness that can sufficiently exert the effect of the adhesive material. Further, the fine unevenness can be said to be “roughness” that reduces the adhesive strength (peeling strength) of the adhesive seal member. The degree of these “smooth surface” and “fine irregularities” can be appropriately changed depending on the material of the sealing region, the pressure, temperature, time, and the like when the adhesive seal member is pressed. What is important is that the peel strength is set relatively stronger in the strong adhesion region than in the adjustment region.

  As described above, in the present invention, the sealing region has the strong adhesion region and the adjustment region, and the strong adhesion region and the adjustment region are alternately formed along the outer edge of the sealing region. For this reason, the adhesive seal member is peeled off simultaneously from both the strong adhesion region and the adjustment region. For this reason, a large force is not required at the initial stage of the peeling operation, and a “trigger” at the time of peeling can be easily obtained. It should be noted that once the edge of the seal begins to peel, it can be removed relatively easily thereafter. On the other hand, in the conventional structure, since the adhesive seal member is bonded to a region having a substantially uniform peel strength, a large force is required at the initial stage of peeling the seal.

  In the present invention, the structure of the sealing region around the opening is devised, and thereby the adhesive seal member is easily peeled off, so that the adhesive force itself of the seal member can be increased and the sealing performance is improved. Can be achieved.

  Hereinafter, the best mode for carrying out the present invention will be described in detail using embodiments. FIG. 1 is a schematic exploded view showing the structure of a sealed container 100 according to the first embodiment of the present invention. A sealed container 100 according to the present embodiment includes a cylindrical container main body 102 that stores lotion, an inner plug 104 that is fitted on the upper portion of the container main body 102, and an adhesive seal that is attached to the upper surface of the inner plug 104. A member (safety seal) 106 and an upper lid 108 are provided.

  The container main body 102 is made of plastic, and a male screw part 110 is integrally formed on the outer periphery of the upper part, and is screwed into a female screw part (not shown) formed inside the upper lid 108.

  The inner plug 104 is an integrally molded product of plastic, similar to the container body 102, and is molded using a mold. The adhesive seal member 106 has an adhesive layer formed on the bottom surface, and is adhered to the inner plug 104 by applying heat and pressure. The details of the inner plug 104 and the adhesive seal member 106 will be described with reference to FIGS.

  The inner plug 104 includes a central protrusion 112 inserted into the container body 102, a sealing region 116 that is molded with a step on the upper surface, and an opening 114 provided in the center of the sealing region 116. I have. The sealing region 116 is a region to which the adhesive seal member 106 is bonded, and is formed slightly smaller than the adhesive seal member 106. The opening 114 communicates with the container main body 102 via the central projecting portion 112, and contents such as lotion are shaken out from the opening 114 during use. In the present embodiment, the container main body 102, the inner stopper 104, and the adhesive seal member 106 are formed in a circular or cylindrical shape, but the horizontal cross section may be other shapes such as an ellipse or a polygon. .

  The adhesive seal member 106 includes a flap 106a that protrudes outward from the circular main body. The flap 106a is a portion that is picked and pulled when the adhesive seal member 106 is peeled off, and is in a floating state without being adhered to the inner plug 104 even when the container 100 is unused.

  The sealing region 116 formed on the upper surface of the inner plug 104 includes a strong adhesion region 116a having a strong adhesive force (peeling strength) to the adhesive seal member 106 and an adjustment region 116b having a low adhesive force (peeling strength) to the adhesive seal member 106. And. The surface of the strong adhesion region 116a is smooth, but a fine uneven pattern is formed on the surface of the adjustment region 116b. Such a pattern can be easily made by transferring the pattern formed on the mold, and the convex surface (upper surface) of the concave-convex pattern is flush with the surface of the strong adhesion region 116a (level). Is set.

  FIG. 4 shows a pattern shape example of the strong adhesion region 116a and the adjustment region 116b that can be applied to the present invention. In FIG. 4, in any of (A) to (E), the strong adhesion region 116 a has a shape protruding at an acute angle in the radial direction at the outer edge portion of the sealing region 116. The protruding portions are continuously formed along the outer periphery of the sealing region 116 at a constant interval (pitch). Note that the pattern shown in FIG. 4 is merely an example, and other shapes can be employed. In any case, only the strong adhesion region 116a is formed around the opening 114 to improve the sealing performance.

  By changing the shape and interval of the concavo-convex pattern in the adjustment region 116b, the total area of the convex surface can be adjusted, and thereby the adhesive force (peel strength) of the adjustment region 116b to the adhesive seal member 106 can be adjusted. Variable.

  When configuring the pattern shape of the strong adhesion region 116a and the adjustment region 116b, there is a relationship between the width W of the flap 106a of the adhesive seal member 106 and the pitch P in the circumferential direction of the acute protrusion of the strong adhesion region 116a. is important. In this embodiment, the relationship of W> P is maintained. With such a setting, the adjustment region 116b always occupies a larger range in the outer edge portion (the portion where peeling is triggered) of the sealing region 116 to which the adhesive seal member 106 is bonded. When the adhesive seal member 106 is peeled off by pulling the flap 106a, the peeling force acts simultaneously in both the strong adhesion region 116a and the adjustment region 116b, and the adhesive seal member 106 can be easily peeled off. .

  FIG. 6 is a schematic diagram showing a fine uneven pattern of the adjustment region 116b applicable to the present invention. As shown in the figure, various patterns such as a lattice shape, a stripe shape, a check pattern, a wave pattern, and a dot shape can be employed. By forming a fine concavo-convex pattern on the surface of the sealing region 116, the adhesive force to the adhesive seal member 106 becomes lower than that of a smooth surface such as the strong adhesion region 116a. As a result, the adjustment region 116b is formed. In addition to the fine concavo-convex pattern, it is possible to obtain the same effect by performing other processing (chemical treatment, drug application, etc.).

  The inventor of the present application has conducted an experiment many times in comparison with a conventional product in order to confirm the effect of the present invention. FIG. 7 is an explanation showing an experimental method for confirming the effect of the present invention, and shows the direction in which the flap 106a of the adhesive seal member 106 is pulled. In the figure, θ represents an angle (outside angle) formed by the bonding surface (the surface of the sealing region 116) and the direction in which the flap 106a is pulled. The experiment used a “push-pull gauge” that is commonly used to measure pushing and pulling forces. The flap 106a of the adhesive seal member 106 was pulled with a push-pull gauge, and the strength (N: Newton) at that time was measured. The pulling speed was automatically set to be 100 mm per minute. The values measured with a push-pull gauge were automatically tabulated using an autograph.

  The results are shown in FIGS. FIG. 8 shows the results when the pulling angle θ is 135 degrees, and FIG. 9 shows the results when the pulling angle θ is 90 degrees (right angle). Note that the results shown in FIGS. 8 and 9 are shown as an average of many experiments. 8 and 9, the horizontal axis represents time (unit: seconds), and the vertical axis represents peel strength (unit: N). From the two graphs, it can be seen that in the case of the product of the present invention, the adhesive seal member 106 can be peeled off with a smaller force than the conventional product. In particular, the point at which the peel strength reaches a peak after the start of the peeling operation (one-dot chain line) is important. After this peak is exceeded, both the present invention product and the conventional product peel off the adhesive seal member 106 with a small peel strength. Has been. The difference in effect between the product of the present invention and the conventional product is particularly noticeable when the flap 106a is pulled up in a direction close to vertical.

  10A and 10B are a plan view (A) showing another example of the structure of the sealing region (strong adhesion region and adjustment region) applicable to the present invention, and a cross-sectional view in the BB direction of FIG. B). In the example shown in FIG. 10, the adjustment region 116b and the strong adhesion region 116a are molded with a step, and the adjustment region 116b is further lowered. By adopting such a structure, the adhesive seal member 106 adheres only to the strong adhesion region 116a and does not adhere to the adjustment region 116b. That is, unlike the example described with reference to FIG. 2 and the like, the peel strength has two levels of a strongly bonded region and a non-bonded region. Therefore, although it is difficult to finely adjust the peel strength, it is possible to obtain substantially the same effect as the above-described example.

  FIG. 11 is a schematic exploded view showing the structure of the sealed container 200 according to the second embodiment of the present invention. A sealed container 200 according to the present embodiment includes a cylindrical container main body 202 that stores skin lotion, an adhesive seal member (safety seal) 206 that closes an opening formed on the upper surface of the container main body, and an upper lid 208. I have. The difference between the container 200 of the present embodiment and the container 100 of the first embodiment described above is only whether or not the inner plug is used, and other configurations (FIGS. 3 to 6 and the like) are the same. Therefore, a duplicate description is omitted. In addition, the code | symbol 210 in FIG. 11 is the external thread part formed in the upper outer periphery of the container main-body part 202. FIG. Also in this embodiment, the same effect as that of the first embodiment described above can be obtained.

  FIG. 12 is a schematic exploded view showing the structure of a sealed container 300 according to the third embodiment of the present invention. The sealed container 300 according to the present embodiment includes a tubular container main body 302, an adhesive seal member (safety seal) 306 that closes an opening formed on the upper surface of the container main body 302, and an upper lid 308. Also in the container 300 of the present embodiment, the inner plug is not used as in the case of the container 200 of the second embodiment described above. Since the basic configuration (FIGS. 3 to 6 and the like) such as the structure around the opening of the container 302 is the same as that of the first embodiment, a duplicate description is omitted. In addition, the code | symbol 310 in FIG. 12 is the external thread part formed in the upper outer periphery of the container main-body part 302. FIG. Also in this embodiment, the same effect as that of the first embodiment described above can be obtained.

  FIG. 13 is a schematic exploded view showing the structure of the sealed container 400 according to the fourth embodiment of the present invention. The sealed container 400 according to the present embodiment includes, for example, a shallow cylindrical container main body 402 that contains creamy cosmetics, and an adhesive seal member (safety seal) that closes an opening formed on the upper surface of the container main body 402. 406 and an upper lid 408 are provided. Also in the container 400 of the present embodiment, the inner plug is not used as in the containers of the second and third embodiments described above. Since the basic configuration (FIGS. 3 to 6 and the like) such as the structure around the opening of the container 402 is the same as that of the first embodiment, a duplicate description is omitted. Also in this embodiment, the same effect as that of the first embodiment described above can be obtained.

  The present invention can be applied to various types of containers such as detergent containers and seasoning containers in addition to cosmetic containers.

FIG. 1 is a schematic exploded view showing the structure of a sealed container according to the first embodiment of the present invention. FIG. 2 is a perspective view showing a structure of a main part (inner plug + adhesive seal) of the sealed container according to the first embodiment. FIG. 3 is a cross-sectional view showing the structure of the main part (inner plug) of the sealed container according to the first embodiment, and shows the cross-sectional structure in the AA direction of FIG. FIG. 4 is a plan view showing a pattern shape of the strong adhesion region and the adjustment region applicable to the present invention. FIG. 5 is an enlarged view showing a part of the sealed container according to the first embodiment. FIG. 6 is a schematic diagram showing a fine concavo-convex pattern in an adjustment region applicable to the present invention. FIG. 7 is an explanation showing a method of an experiment for confirming the effect of the present invention. FIG. 8 is a graph showing the result of the experiment for confirming the effect of the present invention (change in peel strength with respect to time). FIG. 9 is a graph showing a result of an experiment for confirming the effect of the present invention (change in peel strength with respect to time). 10A and 10B are a plan view (A) showing another example of the structure of the sealing region (strong adhesion region and adjustment region) applicable to the present invention, and a cross-sectional view in the BB direction of FIG. B). FIG. 11 is a schematic exploded view showing the structure of the sealed container according to the second embodiment of the present invention. FIG. 12 is a schematic exploded view showing the structure of a sealed container (tube) according to the third embodiment of the present invention. FIG. 13 is a schematic exploded view showing the structure of a closed container (cream container) according to the third embodiment of the present invention.

Claims (10)

A container body for storing contents;
An opening for discharging the contents from the container body to the outside;
An adhesive seal member that is bonded to a sealing region located around the opening and thereby closes the opening;
The sealing region has a strong adhesion region having a high peel strength with respect to the adhesive seal member, and a weak adhesion region having a peel strength weaker than the strong adhesion region,
The strong adhesion region and the weak adhesion region are alternately formed along the outer edge of the sealing region,
The strong adhesion region has a projection-shaped region that extends radially in the vicinity of the outer edge of the sealing region and becomes a star shape as a whole,
Closed container the weak adhesive region, characterized that you located between the projection-shaped region adjacent. A container body for storing contents;
An opening for discharging the contents from the container body to the outside;
An adhesive seal member that is bonded to a sealing region located around the opening and thereby closes the opening;
The sealing region has a strong adhesion region having a high peel strength with respect to the adhesive seal member, and a weak adhesion region having a peel strength weaker than the strong adhesion region,
The strong adhesion region and the weak adhesion region are alternately formed along the outer edge of the sealing region,
The strong adhesion region has a projection-shaped region that extends radially in the vicinity of the outer edge of the sealing region and becomes a gear shape as a whole.
Closed container the weak adhesive region, characterized that you located between the projection-shaped region adjacent. A container body for storing contents;
An opening for discharging the contents from the container body to the outside;
An adhesive seal member that is bonded to a sealing region located around the opening and thereby closes the opening;
The sealing region has a strong adhesion region having a high peel strength with respect to the adhesive seal member, and a weak adhesion region having a peel strength weaker than the strong adhesion region,
The strong adhesion region and the weak adhesion region are alternately formed along the outer edge of the sealing region,
The strong adhesion region has a protrusion-shaped region having a waveform near the outer edge of the sealing region,
Closed container the weak adhesive region, characterized that you located between the projection-shaped region adjacent.   The sealed container according to any one of claims 1 to 3, wherein only the strong adhesion region is formed around the opening of the sealing region.   The sealed container according to any one of claims 1 to 4, further comprising an inner stopper connected to the container main body and including the opening and the sealing region. The strong adhesion region has a smooth surface, the weak adhesion region has fine irregularities formed on the surface,
The closed container according to any one of claims 1 to 5, wherein the convex-concave surface (upper surface) of the concavo-convex shape is set to the same height (level) as the surface of the strong adhesion region. .   The sealed container according to claim 6, wherein the unevenness is patterned in a lattice shape including orthogonal vertical and horizontal lines.   The sealed container according to claim 6, wherein the unevenness is patterned in a stripe shape.   The sealed container according to claim 6, wherein the unevenness is patterned in a dot shape. The adhesive seal member is used when the adhesive seal member is peeled off, without being adhered to the sealing region and the central adhesive portion bonded to the sealing region and extending outward from the central adhesive portion. With a flap,
The width W of the portion where the flap and the central adhesive portion are connected is larger than the pitch of the strong adhesion region formed continuously along the outer periphery of the sealing region. 10. The sealed container according to any one of 9 above.

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