JPH0534226B2 - - Google Patents
Info
- Publication number
- JPH0534226B2 JPH0534226B2 JP60028348A JP2834885A JPH0534226B2 JP H0534226 B2 JPH0534226 B2 JP H0534226B2 JP 60028348 A JP60028348 A JP 60028348A JP 2834885 A JP2834885 A JP 2834885A JP H0534226 B2 JPH0534226 B2 JP H0534226B2
- Authority
- JP
- Japan
- Prior art keywords
- tape
- opening
- lid
- coated
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012790 adhesive layer Substances 0.000 claims description 13
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 claims description 11
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000011888 foil Substances 0.000 claims description 8
- 239000003973 paint Substances 0.000 claims description 7
- 229920006026 co-polymeric resin Polymers 0.000 claims description 6
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 229920001187 thermosetting polymer Polymers 0.000 claims description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 5
- 229920002554 vinyl polymer Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 3
- XFNGYPLLARFULH-UHFFFAOYSA-N 1,2,4-oxadiazetidin-3-one Chemical compound O=C1NON1 XFNGYPLLARFULH-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 238000009820 dry lamination Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Landscapes
- Closures For Containers (AREA)
- Containers Opened By Tearing Frangible Portions (AREA)
Description
（産業上の利用分野）
本発明は、缶詰缶の蓋に予め開口部を設けてお
き、片面の接着剤を塗布したテープで外面塗膜を
有する蓋の開口部を覆い、このテープを蓋へヒー
トシールすることによつて開口部を密閉するいわ
ゆるピルフアーブルーフ性のある開口容易な蓋の
被着方向に関する。
（従来の技術）
上記蓋の一例が実開昭54−85139号に提案され
ている。この蓋は、蓋とテープがともに紙を主体
としたものであり、何れか一方に塩化ビニール−
酢酸ビニール共重合体樹脂の層を、そして他方に
ポリプロピレン樹脂、ポリエステル樹脂、アルミ
ニウム箔、ポリスチレン樹脂、延伸ポリアミド樹
脂またはポリ塩化ビニール樹脂の層を設け、両層
を対面させてヒートシール等の手段で密着させた
ものであり、開封に際して樹脂の層間で容易に剥
離するものである。
（発明が解決しようとする問題点）
上記蓋において、ヒートシールで接着した場
合、一般的にはヒートシール温度が低いと両樹脂
層間の接着強度が弱く、従つて層間剥離になる
が、極めて簡単なテープを剥離でき、予期しない
開口を生じる恐れがある。
又高温でヒートシールすると接着強度は大にな
るが、剥離が樹脂層内でなされ、凝集破壊とな
り、第５図に示すように缶蓋１とテープ２の両方
の剥離面に樹脂層の残材が点在して凹凸を生じ外
観が美麗ではない。従つて内容物が液体飲料のと
きその缶詰缶開口部に直接口をつけて飲む場合に
は不快感を与える。
本発明は、容易には剥離せず、それでいて確実
に美麗な剥離面が得られるテープ被着方法を得る
ことを目的とする。
（問題点を解決するための手段）
本発明方法では、上記目的を達成するために、
アルミ基材の外面に熱硬化性ビニール塗料を塗布
し熱硬化させた塗膜を有し開口部を形成してある
缶詰缶蓋の該開口部を、アルミ箔の片面に、酢酸
ビニールの配合比が20〜15％の塩化ビニールと酢
酸ビニールのコポリマー樹脂を、塗膜厚が１〜
6μｍになる如く塗布し、200〜250℃の範囲の温
度で充分に乾燥した接着剤層を有するテープで覆
い、180〜220℃の範囲の温度でヒートシールす
る。
（作用）
本発明方法に依るときは、容易には開封できな
い剥離強度をもつにも拘らず、綺麗な剥離面が得
られる。
これに関連し、本発明に到達するまでに行つた
実験について説明する。
先ず、缶蓋の外面に熱硬化性ビニール塗料を塗
布し熱硬化させてから開口部を形成し、テープと
してはアルミ箔に酢酸ビニール配合比が15％の塩
化ビニールと酢酸ビニールのコポリマー樹脂を１
〜6μｍ塗布し、200〜250℃の範囲の温度で充分
に乾燥させて作成し、そして上記缶蓋に上記テー
プをヒートシールしてヒートシール温度を剥離強
度の関係を調べた。その実験結果を第１表に示
す。
(Industrial Application Field) The present invention involves providing an opening in the lid of a canned can in advance, covering the opening of the lid with an outer coating film with a tape coated with adhesive on one side, and attaching this tape to the lid. The present invention relates to the direction of attaching a lid that is easy to open and has a so-called pilfer-proof property that seals the opening by heat sealing. (Prior Art) An example of the above-mentioned lid is proposed in Utility Model Application Publication No. 54-85139. In this lid, both the lid and the tape are mainly made of paper, and either one is made of vinyl chloride.
A layer of vinyl acetate copolymer resin is provided on the other side, and a layer of polypropylene resin, polyester resin, aluminum foil, polystyrene resin, stretched polyamide resin, or polyvinyl chloride resin is provided on the other side, and both layers are made to face each other by means such as heat sealing. It is made to be in close contact with each other, and the resin layers are easily peeled off when the package is opened. (Problem to be Solved by the Invention) When the above-mentioned lid is bonded by heat sealing, in general, if the heat sealing temperature is low, the adhesive strength between both resin layers is weak, resulting in delamination, but this is extremely simple. This may cause the tape to peel off, resulting in unexpected openings. Furthermore, when heat-sealing at high temperatures, the adhesive strength increases, but peeling occurs within the resin layer, resulting in cohesive failure, and as shown in FIG. The appearance is not beautiful as it is scattered and uneven. Therefore, when the contents are liquid beverages, drinking by directly touching the opening of the can causes discomfort. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for applying a tape that does not peel off easily and yet ensures a beautiful peeling surface. (Means for solving the problem) In the method of the present invention, in order to achieve the above object,
The opening of a can lid, which has an opening formed by applying a thermosetting vinyl paint to the outer surface of an aluminum base material and heat-curing it, is coated on one side of aluminum foil, and the mixture ratio of vinyl acetate is Copolymer resin of vinyl chloride and vinyl acetate with a coating thickness of 1 to 15%.
It is coated to a thickness of 6 μm, covered with a tape having an adhesive layer sufficiently dried at a temperature in the range of 200-250°C, and heat-sealed at a temperature in the range of 180-220°C. (Function) When the method of the present invention is used, a clean peeling surface can be obtained despite having a peeling strength that does not allow easy opening. In this regard, experiments conducted to arrive at the present invention will be described. First, a thermosetting vinyl paint is applied to the outer surface of the can lid and heat cured to form an opening.The tape is made by coating aluminum foil with a copolymer resin of vinyl chloride and vinyl acetate with a blending ratio of 15% vinyl acetate.
The tape was coated to a thickness of ~6 μm and thoroughly dried at a temperature in the range of 200 to 250° C., and the tape was heat-sealed to the can lid to examine the relationship between heat-sealing temperature and peel strength. The experimental results are shown in Table 1.
【表】
上記表の160℃でヒートシールーしたものは接
着剤層と塗料層の界面での剥離（層間剥離）であ
り、剥離強度が急激に低下し極めて簡単に剥離
し、又ヒートシート温度が220℃以上になると接
着剤が分解し、凝集破壊となることが判つた。即
ち180〜220℃の範囲でヒートシートすると、アル
ミ箔と接着剤層との界面で剥離し美麗な剥離面が
得られることが判明した。同時にこの実験で接着
剤層の膜厚を１〜6μｍにすると開口部周縁で接
着剤がきれいに破断することも判つた。
次に上記コーポリマー樹脂の酢酸ビニール樹脂
の含有量及びこのコポリマー樹脂の乾燥状態と剥
離強度との関係を示す実験結果を第２表に示す。
なお、ヒートシート温度は200℃であつた。[Table] The products heat-sealed at 160℃ in the above table peel off at the interface between the adhesive layer and the paint layer (interlayer peeling), and the peel strength decreases rapidly and peels off extremely easily. It was found that when the temperature exceeds ℃, the adhesive decomposes and cohesive failure occurs. That is, it was found that when heat-sheeted at a temperature in the range of 180 to 220°C, separation occurs at the interface between the aluminum foil and the adhesive layer, resulting in a beautiful peeled surface. At the same time, this experiment also revealed that when the thickness of the adhesive layer was set to 1 to 6 μm, the adhesive broke cleanly at the periphery of the opening. Next, Table 2 shows experimental results showing the relationship between the vinyl acetate resin content of the copolymer resin, the dry state of the copolymer resin, and the peel strength.
Note that the heat sheet temperature was 200°C.
【表】
上記実験から酢酸ビニール含有量が15〜20％で
あつて、しかもこの接着剤層を充分に乾燥して、
残留溶剤を極く少ない状態にしたのち、適切な温
度でヒートシールすれば必要な剥離強度が得られ
ること、即ち、塗膜厚さが１〜6μｍの接着剤層
の破断強度より大きな剥離強度になり、開口部端
縁で接着剤層が破断し、きれいな開口が得られ、
かつ極めて簡単には開封できない剥離強度をもつ
ことが知られた。
（実施例）
第１〜４図は本発明を実施した態様の説明図
で、第１図は本発明を実施した缶詰缶口部の平面
図、第２図は第１図の１部拡大断面図、第３図は
テープを剥すときの状況の説明図、第４図はテー
プを剥がしたあとの缶詰缶口部の平面図である。
缶詰缶蓋１は、0.25mm厚のアルミ薄板より成
り、このアルミ薄板の内面にはエポキシウレア系
クリアー塗料７を塗装して焼付け、外面には熱硬
化性ビニール塗料８を塗装して焼付け、更に蓋の
製造を容易にするためマイクロワツクスを溶かし
て噴霧塗装した。テープ２の基材は、50μｍ及び
30μｍ厚のアルミ箔であつてその一方の面に二軸
延伸された15μｍ厚のポリエステルフイルム９を
ドライラミネートで接着し、テープ材の破断強度
を補完した。
接着剤層３は塩化ビニール、酢酸ビニールコポ
リマーであり、酢酸ビニールの割合が20％のもの
及び15％のものを、上記アルミ箔の他方の面に１
〜6μｍの厚さに塗装し200〜250℃で充分に乾燥
した。
缶詰缶蓋１の開口部４へテープ２を貼付するに
は、上記により製作したテープ２を、200℃に加
温した缶詰缶蓋１の開口部４を覆うように接着剤
３を下にして載せ、200℃で１秒間100Kgの圧力を
かけてヒートシールした。
この場合テープ２のつまみ５は第２図のように
傾斜して立ち上がつている。このつまみ部５を指
頭に摘んで第３図の如く開口部４のシール部６か
らテープ２を剥がした。
接着剤層を開口部周辺にのみ残置して剥離する
ことができた。
（発明の効果）
本発明の方法によれば、テープが缶蓋から極め
て簡単に剥離することがなく、それでいて確実に
テープと接着剤層の間で剥離し、さらに開口部で
は接着剤層がテープに残り、従つて確実にきれい
な剥離面の周縁をもつ開口部が得られる。[Table] From the above experiment, the vinyl acetate content was 15 to 20%, and this adhesive layer was sufficiently dried.
The necessary peel strength can be obtained by heat-sealing at an appropriate temperature after reducing residual solvent to a minimum, that is, the peel strength is greater than the breaking strength of an adhesive layer with a coating thickness of 1 to 6 μm. The adhesive layer breaks at the edge of the opening, resulting in a clean opening.
It was also known to have a peel strength that made it extremely difficult to open the package. (Example) Figures 1 to 4 are explanatory diagrams of modes in which the present invention is implemented. Figure 1 is a plan view of a can mouth in which the present invention is implemented, and Figure 2 is a partially enlarged cross-section of Figure 1. 3 is an explanatory diagram of the situation when the tape is removed, and FIG. 4 is a plan view of the mouth of the can after the tape is removed. The can lid 1 is made of a thin aluminum plate with a thickness of 0.25 mm.The inner surface of this thin aluminum plate is coated with an epoxy urea-based clear paint 7 and baked, and the outer surface is coated with a thermosetting vinyl paint 8 and baked. To facilitate the manufacturing of the lid, microwax was melted and spray painted. The base material of tape 2 is 50μm and
It was made of aluminum foil with a thickness of 30 μm, and a biaxially stretched polyester film 9 with a thickness of 15 μm was adhered to one side of the foil by dry lamination to supplement the breaking strength of the tape material. The adhesive layer 3 is a vinyl chloride/vinyl acetate copolymer, and one layer with a vinyl acetate ratio of 20% and one with a vinyl acetate ratio of 15% are applied to the other side of the aluminum foil.
It was coated to a thickness of ~6 μm and thoroughly dried at 200 to 250°C. To attach the tape 2 to the opening 4 of the can lid 1, place the tape 2 manufactured above with the adhesive 3 facing down so as to cover the opening 4 of the can lid 1 heated to 200°C. It was then heat-sealed at 200°C by applying a pressure of 100 kg for 1 second. In this case, the tab 5 of the tape 2 stands up at an angle as shown in FIG. The tape 2 was peeled off from the seal 6 of the opening 4 by holding the knob 5 with the tip of the finger as shown in FIG. It was possible to peel off the adhesive layer while leaving it only around the opening. (Effects of the Invention) According to the method of the present invention, the tape does not peel off from the can lid very easily, yet the tape and the adhesive layer reliably separate, and furthermore, at the opening, the adhesive layer , thus ensuring an opening with a clean periphery of the peeling surface.
第１図は本発明を実施した缶詰缶口部の平面
図、第２図は第１図の１部拡大断面図、第３図は
テープを剥すときの状況の説明図、第４図はテー
プを剥がしたあとの缶詰缶口部の平面図、第５図
は従来の缶蓋の説明図である。
１：缶詰缶蓋、２：テープ、３：接着剤層、
４：缶詰開口部、５：つまみ、６：シール部、
８：熱硬化性ビニール塗料。
Figure 1 is a plan view of the mouth of a can according to the present invention, Figure 2 is an enlarged sectional view of a portion of Figure 1, Figure 3 is an explanatory diagram of the situation when the tape is removed, and Figure 4 is the tape. FIG. 5 is a plan view of the mouth of a can after peeling off the lid, and FIG. 5 is an explanatory diagram of a conventional can lid. 1: Canned can lid, 2: Tape, 3: Adhesive layer,
4: Can opening, 5: Knob, 6: Seal part,
8: Thermosetting vinyl paint.
Claims (1)
塗布し熱硬化させた塗膜を有し開口部を形成して
ある缶詰缶蓋の該開口部を、アルミ箔の片面に、
酢酸ビニールの配合比が20〜15％の塩化ビニール
と酢酸ビニールのコポリマー樹脂を、塗膜厚が１
〜6μｍになる如く塗布し、200〜250℃の範囲の
温度で充分に乾燥した接着剤層を有するテープで
覆い、180〜220℃の範囲の温度でヒートシールす
ることを特徴とする缶詰缶開口部へのテープ被着
方法。1. A can lid, which has an opening formed by applying thermosetting vinyl paint to the outer surface of an aluminum base material and then curing it, is coated with the opening on one side of aluminum foil.
A copolymer resin of vinyl chloride and vinyl acetate with a vinyl acetate blending ratio of 20 to 15% is coated with a coating thickness of 1.
A can opening characterized in that the film is coated to a thickness of ~6 μm, covered with a tape having an adhesive layer sufficiently dried at a temperature in the range of 200 to 250°C, and heat-sealed at a temperature in the range of 180 to 220°C. How to apply tape to the area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2834885A JPS61190440A (en) | 1985-02-18 | 1985-02-18 | Method of fitting tape to opening of can |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2834885A JPS61190440A (en) | 1985-02-18 | 1985-02-18 | Method of fitting tape to opening of can |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61190440A JPS61190440A (en) | 1986-08-25 |
| JPH0534226B2 true JPH0534226B2 (en) | 1993-05-21 |
Family
ID=12246093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2834885A Granted JPS61190440A (en) | 1985-02-18 | 1985-02-18 | Method of fitting tape to opening of can |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61190440A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0756139Y2 (en) * | 1991-05-28 | 1995-12-25 | 新日本製鐵株式会社 | Electrode for steel strip flash butt welder |
| JP2584435Y2 (en) * | 1991-11-11 | 1998-11-05 | 三笠産業株式会社 | Polyethylene terephthalate container |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163642A (en) * | 1981-03-31 | 1982-10-07 | Toyo Seikan Kaisha Ltd | Vessel cover which is easily unsealed |
| JPS5931545U (en) * | 1982-08-24 | 1984-02-27 | 池田物産株式会社 | Seat belt for vehicle sliding seat |
-
1985
- 1985-02-18 JP JP2834885A patent/JPS61190440A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57163642A (en) * | 1981-03-31 | 1982-10-07 | Toyo Seikan Kaisha Ltd | Vessel cover which is easily unsealed |
| JPS5931545U (en) * | 1982-08-24 | 1984-02-27 | 池田物産株式会社 | Seat belt for vehicle sliding seat |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61190440A (en) | 1986-08-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |