JP2003081304A - Cap seal made of resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap seal made of a resin, sanitary, unnecessary to perform sorting disposal, causing no fold of a side sheet although a resin sheet in which the amount of resin to be used is kept at a low level is used, having less occurrence of wrinkles on a shrink film, and excellent in a finished appearance. SOLUTION: The cap seal is formed with a top face cover 1 having a side sheet 3 which is integrally connected to the circumference of a top sheet 2 made of a resin, and a cylindrical shrink film 4 for covering an outer face of the top face cover 1, leaving a center portion of the top sheet 2. Recessed stripe parts 5 to be provided in a range of 3-50 stripes are formed on the side sheet 3 of the top face cover 1 in its perpendicular direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin cap seal attached to an extraction port of a container.

[0002]

2. Description of the Related Art A conventional cap seal 20 used for a spout of a barrel-shaped container for beer, sparkling liquor, etc. is a barrel as shown in FIG. 3 (b) of an explanatory view of the conventional cap seal of FIG. 3 is used by being attached so as to cover the cap of the spout of the cylindrical container, and includes a top plate 12 and a side plate 13 connected to the top plate and bent downward as shown in FIG. 3A. And a cylindrical shrink film 14 which is contracted and attached to cover the outer surface of the top plate 12 while leaving the center of the top plate 12 covered. This top cover 11
Is formed from a single disk-shaped paperboard sheet by drawing, but the peripheral portions of the disk-shaped paperboard sheet that becomes the side plates 13 are preliminarily provided with radial ruled lines to facilitate bending of the peripheral portion downward. There is. The top plate is also used as a print medium and is preprinted. Also,
Recently, instead of the top cover 11 made of paperboard, a top cover made of a resin sheet by a sheet forming method and a top cover made of resin (not shown) having side plates integrally connected to the periphery thereof. Is also proposed. Its appearance is shown in Figure 3.
Almost the same as (a), but the side plate has a smooth curved surface.

[0003]

However, paperboard easily absorbs water from its end face and the like, and is suitable for the growth of mold and various bacteria. Especially, liquid containing a large amount of sugar such as beer and sparkling liquor. When it is absorbed and left for a long time, there is a problem that a very unfavorable situation occurs hygienically. Further, the combined use of the paperboard and the resin film is troublesome because it needs to be separated and discarded when it is discharged as dust. Furthermore, since the resin top cover described above generally lacks rigidity as compared to a paper board top plate, the shrinkage of the shrink film causes the side plates to fold unevenly inward, resulting in a final Wrinkles and the like become noticeable on the shrink film attached to the sheet, which causes a problem of impairing the appearance of the finished product. This problem can be solved by using a top cover that is thick and has high rigidity. However, increasing the amount of resin used leads to an increase in cost and an increase in dust. The present invention has been made in view of the above problems, the present invention is hygienic, there is no need for separate disposal, while using a resin sheet with a reduced amount of resin used, without folding of the side plate, It is an object of the present invention to provide a resin cap seal which has a small wrinkle on the shrink film and an excellent finished appearance.

[0004]

A resin cap seal according to the present invention comprises a top cover having a side plate integrally connected to a peripheral edge of a resin top plate, and an outer surface of the top cover with a center of the top plate. And a side wall of the top cover, wherein a plurality of groove portions are formed in the vertical direction. The part is preferably provided in the range of 3 to 50, the side plate has a taper that spreads downward, and the thickness of the top cover is in the range of 100 to 500 μm. The thickness of the shrink film is 20 to 100 μm.
It is preferably in the range of m.

[0005]

The present invention will be described in more detail with reference to the drawings. FIG. 1 is a perspective view of a resin cap seal according to the present invention. The resin cap seal 10 according to the present invention shown in this perspective view is in a state before being attached to the spout, and the tubular shrink film 4 is in an open state at the lower part. As shown in FIG. 1, a resin cap seal 10 according to the present invention includes a top cover 1 having an annular side plate 3 integrally connected to a peripheral edge of a resin top plate 2 and an outer surface of the top cover 1 at the center of the top plate 2. The side wall 3 of the top cover 1 is formed with a plurality of groove portions 5 at a predetermined pitch in the vertical direction. The recessed portion 5 acts like a rib for increasing the rigidity of the side plate 3, and even if the resin sheet is thin, the end of the side plate 3 is unevenly bent inward due to shrinkage of the shrink film when the shrink film 4 is attached. Since this can be prevented, wrinkles and the like are less likely to occur on the shrink film 4, and a resin cap seal having an excellent finished appearance can be attached. In addition,
A perforation tear portion 6 is provided to easily remove the mounted resin cap seal 10 according to the present invention.

FIG. 2 is a sectional view of a resin cap seal according to the present invention. FIG. 2A is a central vertical sectional view. This figure is also drawn before being attached to the spout. Similarly to the shrink film 4, the side plate 3 of the top cover 1 is also preferably tapered so that the inner diameter expands downward. This is the ease of molding, spout 6
This is because of consideration of the ease of covering and the stacking property of the resin cap seal 10 according to the present invention. Figure 2
(B) is a horizontal sectional view of the side plate 3. (Cross section taken along the line xx 'in FIG. 2 (a)) On the side plate 3 of the resin cap seal 10 according to the present invention, the groove portions 5 are formed at a predetermined pitch in the vertical direction. The number of the concave streak portions 5 may be appropriately determined according to the rigidity of the resin sheet itself, the thickness of the resin sheet, the circumferential length, etc., but it is preferably determined within the range of 3 to 50. The cross-sectional shape of the concave streak portion 5 is not limited to that shown in FIG. 2, and may be a square shape, and the side plate 3 has a corrugated shape with less smooth surface, or a concave streak portion and a convex portion having substantially the same width. It may be arranged alternately. The top cover 1 having such a groove 5 can be easily formed by a sheet forming method such as vacuum or vacuum pressure forming.

As the material used for the resin cap seal 10 according to the present invention, it is preferable that the top cover 1 and the shrink film 4 are made of the same material.
A polystyrene resin sheet (hereinafter referred to as PS sheet) is suitably used for the shrink film 4, and a polystyrene resin film (hereinafter referred to as PS film) is suitably used for the shrink film 4. The thickness of the top cover 1 is 100 to 500 in terms of rigidity and economy.
The thickness is preferably in the range of μm, and a resin sheet having a thickness in this range is preferably used. On the other hand, the thickness of the shrink film 4 is preferably in the range of 20 to 100 μm in view of tight shrinkage strength, economy and the like.

Next, examples will be described. (Example 1) PS sheet, W-20, 300 μm (manufactured by Taiyo Kasei Co., Ltd.) was used, and the top plate 2 had a diameter of 71.5 mmφ.
The top plate cover 1 having a depth of the side plate 3 of 6.5 mm and the number of the recessed line portions 5 of 12 was formed by a vacuum pressure forming method. A cylindrical PS film, a fancy wrap GMA, a lateral uniaxially stretched film, around the molded top cover 1, 8
0 μm (manufactured by Gunze Co., Ltd.) is wound and heat-shrinked to have a height of 22.0 mm and a lower end diameter of 7 as shown in FIGS.
Example samples having a diameter of 3.3 mm were prepared. The sample of this example was put on the cap portion of the spout of the aluminum barrel for draft beer 20L, and hot air of 380 ° C was applied diagonally from above. The shrink film 4 contracted while the top cover 1 was brought into close contact with the barrel cap. . In that case, the side plate 3 was not folded inward due to the shrinkage of the shrink film 4, and wrinkles and the like did not occur on the shrink film, and an excellent finished appearance was exhibited. The appearance of the shrink film after shrinkage was visually determined.

Example 2 A sample of Example 2 in which only the number of the concave streak portions 5 was changed to 36 in the specifications of the above-mentioned Example 1 was prepared and mounted on the same cap portion. The effect was obtained.

(Embodiment 3) An example sample 3 was prepared in which only the depth of the side plate 3 was changed to 4.0 mm in the specifications of the above-described embodiment 2, and the same cap portion was mounted. The effect was obtained.

(Embodiment 4) According to the specifications of the above-mentioned Embodiment 1, when only the concave streak portion 5 is changed to 50, an example sample is prepared and mounted on the same cap portion, the same excellent effect is obtained. Was obtained.

(Comparative Example) A comparative example sample which uses the same material as that of the above-mentioned embodiment and has the same dimensions as those of the first embodiment, but has a side plate 3 having a smooth curved surface with no concave streak portion 5 at all. Was prepared and mounted on the same cap portion under the same conditions as the example sample, the side plates were irregularly bent inward, many shrinkage wrinkles were generated in the shrink film, and the top plate 2 which is the printing medium was also slightly deformed. The result was that the finished appearance was extremely impaired.

[0013]

The resin cap seal 10 according to the present invention
According to the above, by providing a plurality of concave streak portions 5 on the side plate 3 of the top cover 1, after the shrink film is attached to the spout cap, there is no irregular bending of the side plate 3 to the inside, and the side plate 3 contracts. It was possible to prevent the appearance of the shrink film from being damaged due to wrinkles and the top plate 2 from being deformed. Further, by unifying the materials of the top cover 1 and the shrink film 4 with the resin of the same system, the trouble of separation and disposal can be eliminated and the hygienic reliability can be obtained.

[Brief description of drawings]

FIG. 1 is a perspective view of a resin cap seal according to the present invention.

FIG. 2 is a sectional view of a resin cap seal according to the present invention.

FIG. 3 is an explanatory view of a conventional cap seal.

[Explanation of symbols]

1 Top cover 2 Top plate 3 side plates 4 shrink film 5 concave section 6 tearing part 7 cap 10 Resin cap seal according to the present invention 11 Top cover 12 Top plate 13 Side plate 14 Shrink film 15 ruled lines 16 Tear 20 Conventional cap seal

Continued front page    F-term (reference) 3E084 AA06 AA12 AB02 BA02 CA01                       CB01 CC03 DA01 DB01 DC03                       FA09 FD09 GB08 KB01 LA05                       LA06 LA24 LB02 LB07 LD01

Claims (5)

[Claims] 1. A top cover having a side plate integrally connected to a peripheral edge of a resin top plate, and a cylindrical shrink film covering an outer surface of the top cover except for a central portion of the top plate. A cap seal made of resin, characterized in that a plurality of groove portions are vertically formed on the side plate of the top cover. 2. The resin cap seal according to claim 1, wherein the number of the concave streak portions is 3 to 50. 3. The resin cap seal according to claim 1 or 2, wherein the side plate has a taper that expands downward. 4. The top cover has a thickness of 100 to 50.
The resin cap seal according to any one of claims 1 to 3, wherein the resin cap seal is in a range of 0 µm. 5. The shrink film has a thickness of 20.
The resin cap seal according to any one of claims 1 to 4, wherein the resin cap seal is in a range of from 100 to 100 µm.