JP2004231244A - Surface treatment method for cork stopper - Google Patents
Surface treatment method for cork stopper Download PDFInfo
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- JP2004231244A JP2004231244A JP2003023296A JP2003023296A JP2004231244A JP 2004231244 A JP2004231244 A JP 2004231244A JP 2003023296 A JP2003023296 A JP 2003023296A JP 2003023296 A JP2003023296 A JP 2003023296A JP 2004231244 A JP2004231244 A JP 2004231244A
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- cork
- cork stopper
- stopper
- peripheral side
- synthetic resin
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、コルク樹皮から形成したコルク栓に関し、具体的には外表面を合成樹脂材で処理し、コルク材が内容液に及ぼす悪影響を遮断したコルク栓の表面処理方法に関するものである。
【0002】
【従来の技術】
【特許文献1】実開昭63−147457号
コルク栓は飲料用容器の栓として何千年の歴史を持ち、その優れたシール性のために合成樹脂材の発達した現在においても、ワイン栓あるいはウイスキー栓等の高級飲料の密封栓として広く使用されている。
このようなコルク栓の成形においては、天然コルク樹皮をそのまま栓形状にくり貫き形成するか、または適当粒度に整粒したコルク粒へ接着剤を混合し、これを加熱加圧して所望の形状のコルク栓を得ている。このコルク栓は当然ながらコルク材そのものが外表面に現れるものであり、その周側面とか両端面には穴とか生長跡等の自然な状態のコルク材が存在することも考えられる。
【0003】
【発明が解決しようとする課題】
前記したように、コルク栓は瓶口に打栓されるとその接液面および接液面近くの周側面のコルク細胞は内容液と接するものとなり、長期間の接触によって該内容液にコルク味あるいはコルク臭が移ったり、コルクダストが該内容液内へ落下することもあり、また、内容液が(多くの場合アルコール含有液であるので)該コルク細胞に染み込んでコルク栓の外表面が見苦しく変色するなどの不具合を発生させる。
【0004】
この種の不具合を解消するために、コルク栓の表面へエマルジョンワックスとシリコーンオイルを塗布し表面処理することでシール性をもたせるとともに、抜栓値の調整をなさしめていた。
ここでのエマルジョンワックスだけではシール性及び撥水効果が得られるが密着するブロッキングの問題が残る。そして、一旦動き出すとズルズルと滑る性質も持っている。一方、シリコーンオイルだけでは抜栓感覚がギシギシした感じになり十分なシール性を得ることができない。
【0005】
実際の例としては実開昭63−147457号にはコルク栓の被覆構造が開示されている。(図示していない)
このコルク栓の被覆構造では、支持材が通る貫通孔内壁面と上端面にシリコーンゴム被覆を形成して飾り付コルク栓を形成している。
しかしながら、このような飾り付コルク栓は内容液に対してシリコーンゴム被覆が外部まで連続しているのでこのシリコーン材が臭いを透過させてしまうという大きな問題をもっている。
本発明はこのような欠点を克服して、成形性に優れ、コルク味・臭い移りを防止し、さらに抜栓値の制御も可能とする、シール性に優れたコルク栓の表面処理方法を提供することを目的とする。
【0006】
【課題を解決するための手段】
本発明は、図面を基に詳述すると図1に示すように、天然コルクを抜き形成するかあるいは天然コルクを粒状に粉砕して所望の形状に圧搾形成などしたコルク栓(1)の表面処理方法であって、前記コルク栓(1)の接液端面及びこれに連なる下部の周側面と上部の周側面へ合成樹脂からなる被膜(2)を塗布形成したことを特徴としている。
また、前記合成樹脂の被膜(2)はシリコーン樹脂からなることを特徴としている。
【0007】
【発明の実施の形態】
本発明では、形成したコルク栓(1)に対し、その接液面及び周側面へ合成樹脂製の被膜(2)を塗布形成するものであるが、この周側面へ被膜(2)を形成するに、その上部と下部とに分断配置する。すなわち、図1に示すようにコルク栓(1)への被膜(2)形成後はコルク材がそのまま露出した素の周側面(1a) がその中間部へ残されるもので、この素の周側面(1a)の存在によって後述する多くの特徴を現わすものとなる。
【0008】
【実施例】
以下に本発明の実施例を示す。
このコルク栓(1)に塗布形成する被膜(2)は合成樹脂材料が用いられるが、これにはウレタン樹脂、エポキシ樹脂、シリコーン樹脂などを採用することができる。
このウレタン樹脂では、低温では硬くなることで表面活性が上がり抜栓値が下がる傾向を示す。また、エポキシ樹脂は、低温ではコルク材に含浸した部分が硬くなることで抜栓値は極端に大きくなる傾向がある。そしてシリコーン樹脂では、常温、低温とも抜栓値は安定しており、温度変化に影響されない抜栓性能を出すことが可能である。ちなみにコルク材のみの被膜(2)の存在が無い素の周側面(1a)の場合の抜栓値は、常温度では低く、低温度では高くなるものである。
【0009】
次に前記シリコーン樹脂の問題点を挙げると、欠点として酸素透過性と吸臭着性を有しており、また硬化するのに時間と温度が必要で、コルク栓(1)の全体をシリコーン樹脂でコーティングするとコルク栓(1)同志互いにブロッキングする不具合を生ずる。又、アルコールにより接着性能が低下(膨潤・剥離)する恐れも有する。
【0010】
そこでコルク栓(1)の両端面から適当幅で、その周側面へ被膜(2)を形成しその中央部に素の周側面(1a)を残すことで、該素の周側面(1a)は直接瓶口の内周面へ密着しその上部と下部とを分断してしまうから、前記問題点の酸素透過性と吸臭着性の弱点を払拭するものとなる。そして抜栓値の制御においても前記被膜(2)の幅面積を調整することで如何様にも設定できる自由度が生まれる。
【0011】
実際の形成では、外径24φ×38mm程度のコルク栓(1)の場合、その上下の両端面から10〜15mm程度立ち上げハケ塗り形成した。また、スプレーによる塗布方法での形成も用いられる。この場合被膜(2)の無い素の周側面(1a)の部分は18〜8mm程度に形成されている。なお、ここでの塗布では接液面のみに限らず、コルク栓(1)の両端面に被膜(2)を形成することも自在に選択できる。
【0012】
本発明で被膜(2)に用いられる合成樹脂材としてはシリコーン樹脂が安定性に優れるので好ましいものとなっており、その中でも接着性の良好なものがより好ましい。また、付加硬化型のものや縮合硬化型のものは、コルク栓(1)へのダメージを考えた場合、低温度で効率的に硬化する縮合硬化型が好ましい。付加硬化型でも触媒等の調整により反応速度を上げることで、低温度で硬化させることも可能である。
【0013】
このようにしてコルク栓(1)の表面に形成された被膜(2)と素の周側面(1a)部分により外部への酸素透過と吸臭着通過が分断され、コルク味・臭いなどの移りを完全に遮断するができる。
【0014】
【発明の効果】
本発明によると、被膜性能に優れ、接着性に優れる被膜(2)と、コルク材が直接瓶内面に接する素の周側面(1a)部分とによって、内容液への味移りを完全に遮断し、しかも弾力性、柔軟性が維持・制御されるので最適な密封力と抜栓力が得られるなど理想的なコルク栓が提供できるものとなる。また、このように被膜(2)が接液面及び周側面へ設けられたことは、コルクダストの発生とかアルコールの浸透を完全に遮断し得るものとなる。
【図面の簡単な説明】
【図1】本発明の一実施例を示す斜視図である。
【符号の説明】
1 コルク栓
2 被膜
1a コルク材露出した素の周側面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cork stopper formed from cork bark, and specifically to a surface treatment method for a cork stopper in which the outer surface is treated with a synthetic resin material and the adverse effect of the cork material on the content liquid is blocked.
[0002]
[Prior art]
[Patent Document 1] Japanese Utility Model Publication No. 63-147457 Cork stoppers have a history of thousands of years as stoppers for beverage containers, and even at the present time when synthetic resin materials have been developed due to their excellent sealing properties, wine stoppers or whiskeys Widely used as a sealing stopper for luxury beverages such as stoppers.
In the formation of such a cork stopper, natural cork bark is directly formed into a stopper shape, or an adhesive is mixed with cork particles adjusted to an appropriate particle size, and this is heated and pressed to obtain a desired shape. I have a cork stopper. Of course, the cork material itself appears on the outer surface of the cork stopper, and natural cork material such as holes or growth marks may be present on the peripheral side surface or both end surfaces.
[0003]
[Problems to be solved by the invention]
As described above, when the cork stopper is plugged into the bottle mouth, the cork cells on the liquid contact surface and the peripheral side surface near the liquid contact surface come into contact with the content liquid. Or, the cork odor may move, or the cork dust may fall into the content liquid, and the content liquid soaks into the cork cells (since it is an alcohol-containing liquid in many cases) and the outer surface of the cork stopper is unsightly. Causes problems such as discoloration.
[0004]
In order to eliminate this kind of problem, an emulsion wax and silicone oil were applied to the surface of the cork stopper and surface treated to provide a sealing property and to adjust the stopper value.
Only the emulsion wax here can provide a sealing property and a water-repellent effect, but still has a problem of blocking. And once it starts moving, it has the property of slipping. On the other hand, with silicone oil alone, the unplugging sensation feels awkward and sufficient sealability cannot be obtained.
[0005]
As an actual example, Japanese Utility Model Laid-Open No. 63-147457 discloses a covering structure of a cork stopper. (Not shown)
In this cork stopper covering structure, a decorative rubber cork stopper is formed by forming a silicone rubber covering on the inner wall surface and upper end surface of the through hole through which the support material passes.
However, such a decorative cork stopper has a big problem that the silicone material allows the odor to permeate because the silicone rubber coating continues to the outside with respect to the content liquid.
The present invention overcomes these drawbacks, and provides a cork stopper surface treatment method with excellent sealing properties that has excellent moldability, prevents the transfer of cork taste and odor, and also enables control of the plug-out value. For the purpose.
[0006]
[Means for Solving the Problems]
The present invention will be described in detail with reference to the drawings. As shown in FIG. 1, the surface treatment of the cork stopper (1) in which natural cork is removed or formed into a desired shape by pulverizing natural cork into a desired shape. The method is characterized in that a coating (2) made of a synthetic resin is formed on the liquid contact end face of the cork stopper (1) and the lower peripheral side surface and the upper peripheral side surface thereof.
The synthetic resin coating (2) is made of a silicone resin.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
In the present invention, the synthetic resin coating (2) is applied to the wetted surface and the peripheral side surface of the formed cork stopper (1). The coating (2) is formed on the peripheral side surface. It is divided into an upper part and a lower part. That is, as shown in FIG. 1, after the coating (2) is formed on the cork stopper (1), the peripheral side surface (1a) of the bare cork material is left as it is in the middle portion. The presence of (1a) reveals many features to be described later.
[0008]
【Example】
Examples of the present invention are shown below.
A synthetic resin material is used for the coating (2) to be applied and formed on the cork stopper (1), and a urethane resin, an epoxy resin, a silicone resin, or the like can be used for this.
In this urethane resin, it becomes hard at low temperature, and the surface activity tends to increase and the plugging value tends to decrease. Moreover, the epoxy resin tends to have an extremely large unplugging value due to the hardened portion of the cork material impregnated at low temperatures. With silicone resin, the unplugging value is stable at both normal temperature and low temperature, and it is possible to achieve unplugging performance that is not affected by temperature changes. By the way, the unplugging value in the case of the raw peripheral surface (1a) without the presence of the coating (2) made only of the cork material is low at normal temperature and high at low temperature.
[0009]
Next, the problems with the silicone resin include oxygen permeability and odor absorption as disadvantages, and time and temperature are required for curing, and the entire cork stopper (1) is made of silicone resin. When coated, the cork stopper (1) causes a problem of blocking each other. In addition, there is a risk that the adhesive performance is lowered (swelled or peeled) by alcohol.
[0010]
Therefore, by forming a coating (2) on the peripheral side surface of the cork stopper (1) at an appropriate width and leaving the peripheral side surface (1a) at the center, the peripheral side surface (1a) of the element is Since it adheres directly to the inner peripheral surface of the bottle mouth and divides the upper part and the lower part, the above-mentioned weak points of oxygen permeability and odor absorption are eliminated. And in the control of the plugging value, the degree of freedom that can be set in any way is created by adjusting the width area of the coating (2).
[0011]
In actual formation, in the case of the cork stopper (1) having an outer diameter of about 24φ × 38 mm, it was formed by brushing by raising about 10 to 15 mm from both upper and lower end faces. Moreover, formation by the application | coating method by a spray is also used. In this case, the part of the raw peripheral side surface (1a) without the coating (2) is formed to be about 18 to 8 mm. In addition, in this application | coating, not only a liquid contact surface but the formation of a film (2) on the both end surfaces of a cork stopper (1) can also be selected freely.
[0012]
As the synthetic resin material used for the coating film (2) in the present invention, a silicone resin is preferable because it is excellent in stability, and among them, a material having good adhesiveness is more preferable. In addition, the addition curable type or the condensation curable type is preferably a condensation curable type that efficiently cures at a low temperature in consideration of damage to the cork stopper (1). Even the addition curing type can be cured at a low temperature by increasing the reaction rate by adjusting the catalyst or the like.
[0013]
In this way, the film (2) formed on the surface of the cork stopper (1) and the peripheral side surface (1a) part of the cork stopper (1a) divide the permeation of oxygen from the outside and the passage of the odor absorption, and transfer of the cork taste, smell, etc. Can be completely blocked.
[0014]
【The invention's effect】
According to the present invention, the film (2) having excellent coating performance and excellent adhesion and the peripheral side surface (1a) of the element in which the cork material is in direct contact with the inner surface of the bottle completely block the taste transfer to the content liquid. In addition, since the elasticity and flexibility are maintained and controlled, it is possible to provide an ideal cork stopper such as an optimum sealing force and plugging force. In addition, the coating (2) provided on the liquid contact surface and the peripheral side surface as described above can completely block the generation of cork dust and the permeation of alcohol.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cork stopper 2 Coating 1a Cork material exposed side surface of element
Claims (3)
前記コルク栓の接液端面及びこれに連なる下部の周側面と上部の周側面へ合成樹脂の被膜を施したことを特徴とするコルク栓の表面処理方法。In the surface treatment method of the cork stopper that is formed by extracting natural cork or pulverizing natural cork into granules,
A surface treatment method for a cork stopper, wherein a coating film of a synthetic resin is applied to a liquid contact end face of the cork stopper, and a lower peripheral side surface and an upper peripheral side surface connected thereto.
Priority Applications (1)
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JP2003023296A JP2004231244A (en) | 2003-01-31 | 2003-01-31 | Surface treatment method for cork stopper |
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JP2003023296A JP2004231244A (en) | 2003-01-31 | 2003-01-31 | Surface treatment method for cork stopper |
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JP2003023296A Pending JP2004231244A (en) | 2003-01-31 | 2003-01-31 | Surface treatment method for cork stopper |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2883809A1 (en) | 2013-12-13 | 2015-06-17 | Uchiyama Manufacturing Corp. | Cork stopper coated with resin layer |
JP2020125140A (en) * | 2019-02-05 | 2020-08-20 | 内山工業株式会社 | Manufacturing method of cork stopper and cork stopper |
-
2003
- 2003-01-31 JP JP2003023296A patent/JP2004231244A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2883809A1 (en) | 2013-12-13 | 2015-06-17 | Uchiyama Manufacturing Corp. | Cork stopper coated with resin layer |
JP2020125140A (en) * | 2019-02-05 | 2020-08-20 | 内山工業株式会社 | Manufacturing method of cork stopper and cork stopper |
JP7339640B2 (en) | 2019-02-05 | 2023-09-06 | 内山工業株式会社 | Cork stopper manufacturing method and cork stopper |
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