JP2015113159A - Resin-coated cork stopper - Google Patents

Resin-coated cork stopper Download PDF

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JP2015113159A
JP2015113159A JP2013257810A JP2013257810A JP2015113159A JP 2015113159 A JP2015113159 A JP 2015113159A JP 2013257810 A JP2013257810 A JP 2013257810A JP 2013257810 A JP2013257810 A JP 2013257810A JP 2015113159 A JP2015113159 A JP 2015113159A
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Prior art keywords
resin
cork stopper
coated
coated cork
coating layer
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JP6218321B2 (en
Inventor
山本　智久
Tomohisa Yamamoto
智久 山本
片山　竜雄
Tatsuo Katayama
竜雄 片山
彰浩 穴吹
Akihiro Anabuki
彰浩 穴吹
立樹 加堂
Tatsuki Kado
立樹 加堂
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Uchiyama Manufacturing Corp
Suntory Holdings Ltd
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Uchiyama Manufacturing Corp
Suntory Holdings Ltd
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Priority to JP2013257810A priority Critical patent/JP6218321B2/en
Priority to US14/569,550 priority patent/US20150166223A1/en
Priority to PT141975714T priority patent/PT2883809T/en
Priority to ES14197571T priority patent/ES2795123T3/en
Priority to EP14197571.4A priority patent/EP2883809B1/en
Publication of JP2015113159A publication Critical patent/JP2015113159A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/0052—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in more than one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D39/00—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D39/0005—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in one piece
    • B65D39/0011—Closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers made in one piece from natural or synthetic cork, e.g. for wine bottles or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/005—Closures provided with linings or internal coatings so as to avoid contact of the closure with the contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2539/00—Details relating to closures arranged within necks or pouring openings or in discharge apertures, e.g. stoppers
    • B65D2539/001—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers
    • B65D2539/008—Details of closures arranged within necks or pouring opening or in discharge apertures, e.g. stoppers with coatings or coverings

Abstract

PROBLEM TO BE SOLVED: To provide a new resin-coated cork stopper having stable openability while maintaining sealability peculiar to cork stopper.SOLUTION: A core part 4 is constituted by a cork stopper body 2 and a resin-coated layer 3. The cork stopper body 2 is made by compression molding in a centripetal direction and provided with a mounting hole 20 to mount an umbrella part 5 formed from one end part 2a toward the other end part 2b along an axis L direction. Compression stress at the time of a moisture content of the core part 4 of 6 wt.% is 100-300 N and smaller than compression stress at the time of a moisture content of the core part 4 of 2 wt.% by 100-150 N when press-fitting the core part 4 to a hollow cylindrical part at an interference of 1.5 mm.

Description

本発明は、ウイスキーやワイン等の飲料容器の口部を閉塞する樹脂被覆コルク栓に関する。   The present invention relates to a resin-coated cork stopper that closes a mouth portion of a beverage container such as whiskey or wine.

前記のようなウイスキーやワイン等の飲料容器の口部を閉塞するコルク栓としては、コルク栓本体の外周部を樹脂やゴムで被覆し、その一端部に取っ手を兼ねた傘部を一体に備えた樹脂（ゴム）被覆コルク栓が広く用いられている（例えば、特許文献１〜４参照）。これらの樹脂被覆コルク栓におけるコルク栓本体としては、コルク粒をバインダー樹脂とともに柱状に圧縮成型し、或いは、天然のコルク樹皮をそのまま栓形状に刳り貫き形成したものが用いられている。また、前記樹脂等による被覆層の形成は、容器内の飲料へのコルクによる臭い移りの防止、コルクダストの容器内への落下防止、或いは、飲料のコルク層への浸入に伴うコルク表面の変色の防止、等を目的としてなされる。そして、このような樹脂等による被覆層の形成に伴い、容器の保管環境、使用条件などの影響を受けずに安定した開栓性が確保されることが求められる。そのため、前記特許文献では、被覆層の表面にシリコーン処理や、粗面化処理等を施すことによって、被覆層の表面の摩擦係数の最適化を行っている。   As a cork stopper that closes the mouth of a beverage container such as whiskey or wine as described above, the outer peripheral part of the cork stopper body is covered with resin or rubber, and an umbrella part that also serves as a handle is provided integrally at one end thereof. Resin (rubber) -coated cork stoppers are widely used (see, for example, Patent Documents 1 to 4). As the cork stopper body in these resin-coated cork stoppers, cork grains are compression-molded in a columnar shape together with a binder resin, or natural cork bark is directly formed in a stopper shape. In addition, the formation of the coating layer by the resin or the like is to prevent the odor from being transferred to the beverage in the container, to prevent the cork dust from falling into the container, or to change the color of the cork surface when the beverage enters the cork layer. It is made for the purpose of prevention. With the formation of the coating layer with such a resin or the like, it is required to ensure a stable openability without being affected by the storage environment of the container and the use conditions. Therefore, in the said patent document, the friction coefficient of the surface of a coating layer is optimized by performing a silicone process, a roughening process, etc. on the surface of a coating layer.

一方、本出願人は、特許文献５において、コルク粒をバインダー樹脂とともに圧縮成型して柱状のコルク栓を形成する際に、柱状体の長手方向（軸方向）に直交する方向、即ち求心方向に圧縮することを提案している。このような圧縮成型によって得られるコルク栓は、樹脂等による被覆層を有していないが、径方向に優れた柔軟性を保有し、容器口部に対する追従性により密封性が向上し、開栓性が良く、開栓時の破断等が生じ難い、等の優れた特性を備えている。   On the other hand, in the case of Patent Document 5, when the applicant forms a columnar cork stopper by compression-molding cork grains together with a binder resin, in the direction perpendicular to the longitudinal direction (axial direction) of the columnar body, that is, the centripetal direction. Propose to compress. The cork stopper obtained by such compression molding does not have a coating layer made of resin or the like, but possesses excellent flexibility in the radial direction, improves the sealing performance due to the followability to the container mouth, and opens the stopper. It has excellent characteristics such as good performance and resistance to breakage when opening.

実開昭６３−１４７４５６号公報Japanese Utility Model Publication No. 63-147456 ＷＯ２００４／０２０３００号公報WO2004 / 020300 publication 特開２００４−２３１２４４号公報JP 2004-231244 A ＷＯ２０１１／１５５５１５号公報WO2011 / 155515 特開２０１０−０９９９０９号公報JP 2010-099909 A

前記のように、樹脂等による被覆層を備えるコルク栓の場合、開栓性を向上させるために、被覆層の表面にシリコーン処理や、粗面化処理等を施すことによって、摩擦係数の最適化を行っていた。しかし、このような摩擦係数の最適化のための処理は、製造工程が増えコストアップの要因ともなっていた。また、コルクの応力が変化した場合に、摩擦係数をコントロールしても、開栓性は安定しない問題は残存していた。さらに、開栓性の向上と栓飛び防止を両立させることには、まだ難しさがあった。加えて、樹脂被覆コルク栓をウイスキーやワイン等の飲料容器に用いる場合、季節の変化等によって、コア部の含水分が概ね２重量％から６重量％の範囲で変動する。含水分が低い程、飲料容器の口部に圧入した状態の圧縮応力が大きく、開栓性が悪くなる。そのため、季節の変化にも、閉栓時の圧縮応力の変動が少なく、良好な開栓性が維持されることが望まれていた。
そこで、本発明者等がその後検証した結果、特許文献５に開示されたコルク栓は、閉栓時の応力が、軸方向に沿って圧縮成型したものに比べて、安定化することが知見された。 As described above, in the case of a cork stopper provided with a coating layer made of resin or the like, the friction coefficient is optimized by applying a silicone treatment or a surface roughening treatment to the surface of the coating layer in order to improve the openability. Had gone. However, such a process for optimizing the coefficient of friction has increased the number of manufacturing steps and has been a factor in increasing costs. Further, when the stress of the cork changes, there remains a problem that the opening performance is not stable even if the friction coefficient is controlled. Furthermore, it has been difficult to achieve both the improvement of the opening performance and the prevention of the plug skipping. In addition, when the resin-coated cork stopper is used for a beverage container such as whiskey or wine, the moisture content of the core part varies in a range of approximately 2% to 6% by weight due to seasonal changes or the like. The lower the moisture content, the greater the compressive stress in the state of being press-fitted into the mouth portion of the beverage container, resulting in poorer opening performance. For this reason, it has been desired that even when the season changes, there is little fluctuation in the compressive stress at the time of closing, and good openability is maintained.
Therefore, as a result of subsequent verification by the present inventors, it has been found that the cork stopper disclosed in Patent Document 5 stabilizes the stress at the time of closing compared to the one compression-molded along the axial direction. .

本発明は、前記に鑑み、コルク栓特有のシール性を維持しながら、より安定した開栓性を備える新規な樹脂被覆コルク栓を提供することを目的としている。加えて、前記知見結果を樹脂被覆コルク栓に適用することを試み、種々検証した結果、一層安定した開栓性を備えるとともに、栓飛びが生じ難くなる樹脂被覆コルク栓が簡易に得られることを新たに知見し、この知見に基づく新規な樹脂被覆コルク栓を提供することも目的としている。   In view of the above, an object of the present invention is to provide a novel resin-coated cork stopper that has a more stable opening ability while maintaining a seal characteristic unique to the cork stopper. In addition, as a result of attempting to apply the findings to the resin-coated cork stopper and variously verifying it, it is possible to easily obtain a resin-coated cork stopper that has a more stable opening performance and is less likely to cause plug skipping. Another object is to provide a new resin-coated cork stopper based on this knowledge.

本発明に係る樹脂被覆コルク栓は、コルク粒をバインダー樹脂と共に圧縮成型した柱状のコルク栓本体と、該コルク栓本体の軸方向一端部側から他端部を含む外周面に被覆された樹脂被覆層とを含む樹脂被覆コルク栓において、前記コルク栓本体と樹脂被覆層とによりコア部を構成し、前記コア部を締め代１．５ｍｍで中空筒部に圧入する場合において、該コア部の含水分が６重量％時における圧縮応力が、１００〜３００Ｎであり、且つ、該コア部の含水分が２重量％時における圧縮応力より１００〜１５０Ｎ小さいことを特徴とする。   The resin-coated cork stopper according to the present invention includes a columnar cork stopper main body obtained by compression-molding cork grains together with a binder resin, and a resin-coated outer peripheral surface including the other end portion from one axial end side of the cork stopper main body. In the resin-coated cork stopper including a layer, when the core part is constituted by the cork stopper main body and the resin coating layer, and the core part is press-fitted into the hollow cylinder part with a fastening allowance of 1.5 mm, The compressive stress when the moisture is 6% by weight is 100 to 300N, and the moisture content of the core part is 100 to 150N smaller than the compressive stress when the moisture is 2% by weight.

一般に、樹脂被覆コルク栓をウイスキーやワイン等の飲料容器に用いる場合、季節の変化等によって、コア部の含水分が概ね２重量％〜６重量％の範囲で変動する。含水分が低い程、飲料容器の口部に圧入した状態の圧縮応力が大きく、開栓性が悪くなる。而して、本発明の樹脂被覆コルク栓の場合、コア部の含水分が６重量％時での圧縮応力が１００〜３００Ｎと小さく、しかも、コア部の含水分が２重量％時における圧縮応力との変動幅が１００〜１５０Ｎで小さいから、季節の変化にも開栓性の変動が小さく良好な開栓性が安定的に維持される。因みに、コア部の含水分が６重量％時における圧縮応力が１００Ｎより小さくなると、シール性が悪くなる傾向となる。また、コア部の含水分が６重量％時における圧縮応力が３００Ｎを超えると、含水分が２重量％に変化した時に、圧縮応力が大きくなり、開栓性が低下する傾向となる。   In general, when the resin-coated cork stopper is used for a beverage container such as whiskey or wine, the moisture content of the core part varies within a range of approximately 2% by weight to 6% by weight due to seasonal changes or the like. The lower the moisture content, the greater the compressive stress in the state of being press-fitted into the mouth portion of the beverage container, resulting in poorer opening performance. Thus, in the case of the resin-coated cork stopper of the present invention, the compressive stress when the moisture content of the core is 6% by weight is as small as 100 to 300N, and the compressive stress when the moisture content of the core is 2% by weight. Since the fluctuation range is as small as 100 to 150 N, the fluctuation in the openability is small even in the seasonal change, and the good openability is stably maintained. Incidentally, when the compressive stress when the moisture content of the core part is 6% by weight becomes smaller than 100N, the sealing property tends to be deteriorated. On the other hand, when the compressive stress when the moisture content of the core part is 6% by weight exceeds 300N, the compressive stress increases when the moisture content changes to 2% by weight, and the openability tends to decrease.

本発明の樹脂被覆コルク栓において、前記コルク栓本体が、求心方向に圧縮成型されたものであっても良い。
本発明の樹脂被覆コルク栓によれば、コルク栓本体が、求心方向に圧縮成型されたものであるから、径方向に優れた柔軟性を保有する。これにより、当該樹脂被覆コルク栓を、容器の口部に圧入して閉栓した際には、この柔軟性により口部の内面に弾接し、しかも口部の内面との間に樹脂被覆層が介在した状態で弾性圧縮されるから、安定したシール性が得られる。また、バインダー樹脂の結合力とが相俟ってコルク栓本体の長手方向（軸方向）の強度が大きくなり、閉栓及び開栓時の破断等が生じ難くなる。 In the resin-coated cork stopper of the present invention, the cork stopper main body may be compression-molded in the centripetal direction.
According to the resin-coated cork stopper of the present invention, the cork stopper main body is compression-molded in the centripetal direction, and therefore has excellent flexibility in the radial direction. As a result, when the resin-coated cork stopper is press-fitted into the mouth of the container and closed, the flexibility makes it elastically contact the inner surface of the mouth, and the resin coating layer is interposed between the inner surface of the mouth. Since it is elastically compressed in this state, a stable sealing property can be obtained. Further, combined with the binding force of the binder resin, the strength in the longitudinal direction (axial direction) of the cork stopper main body is increased, and breakage at the time of closing and opening is less likely to occur.

本発明の樹脂被覆コルク栓において、前記コルク栓本体が、前記一端部側から軸方向に沿って他端部側に向け形成された傘部を取付けるための取付用穴部を備えているものであっても良い。
本発明の樹脂被覆コルク栓によれば、取付用穴部に傘部が取付けられ、この傘部を取っ手としてコルク栓の閉栓及び開栓が簡易になされる。
この場合、前記コア部における前記取付用穴部の底部に対応する部位から前記他端部にかけての部分に、他の部分の外径より大きい膨大部を有しているものとしても良い。
これによれば、膨大部の存在により、いわゆる栓飛びが生じ難くなる。
この場合、さらに、前記膨大部が、前記コア部を加熱することにより形成されたものとしても良い。
コア部を加熱すると、コルク栓本体が熱膨張する。而して、本発明の樹脂被覆コルク栓によれば、前記取付用穴部の底部に対応する部位から他端部にかけての部分は中実状であり、しかも、コルク栓本体が求心方向に圧縮成型されたものであるから、熱膨張はこの部分を拡径するよう作用する。従って、加熱によって膨大部の形成が簡易になされる。 In the resin-coated cork stopper of the present invention, the cork stopper main body includes an attachment hole for attaching an umbrella portion formed from the one end side toward the other end side along the axial direction. There may be.
According to the resin-coated cork stopper of the present invention, an umbrella is attached to the attachment hole, and the cork stopper can be easily closed and opened using the umbrella as a handle.
In this case, it is good also as what has a huge part larger than the outer diameter of another part in the part from the site | part corresponding to the bottom part of the said mounting hole part in the said core part to the said other end part.
According to this, so-called plug skipping is less likely to occur due to the presence of the enormous portion.
In this case, the enormous part may be formed by heating the core part.
When the core part is heated, the cork stopper body is thermally expanded. Thus, according to the resin-coated cork stopper of the present invention, the portion from the portion corresponding to the bottom of the mounting hole to the other end is solid, and the cork stopper body is compression-molded in the centripetal direction. Therefore, the thermal expansion acts to expand the diameter of this portion. Therefore, enormous portions can be easily formed by heating.

本発明の樹脂被覆コルク栓において、前記樹脂被覆層が、ポリエチレンテレフタレートからなるものとしても良い。
本発明の樹脂被覆コルク栓によれば、飲料容器に適用する場合、樹脂被覆層が接液部となるが、樹脂被覆層がバリア性の高いポリエチレンテレフタレートからなるから、容器内の飲料液に対するコルクによる臭い移りを防止することができる。また、ポリエチレンテレフタレートは、無害であり、衛生的であるから、飲料用のコルク栓の樹脂被覆層に適している。 In the resin-coated cork stopper of the present invention, the resin coating layer may be made of polyethylene terephthalate.
According to the resin-coated cork stopper of the present invention, when applied to a beverage container, the resin coating layer becomes a wetted part, but since the resin coating layer is made of polyethylene terephthalate having a high barrier property, the cork for the beverage liquid in the container is used. It is possible to prevent the smell from being transferred. Polyethylene terephthalate is harmless and hygienic, so it is suitable for a resin coating layer of a cork stopper for beverages.

本発明の樹脂被覆コルク栓において、前記被覆層の樹脂が、滑剤を含有しているものとしても良い。
本発明の樹脂被覆コルク栓によれば、被覆層の樹脂が滑剤を含有していることにより、被覆層の表面の摩擦係数のコントロールがし易く、安定した開栓性が得られる。 In the resin-coated cork stopper of the present invention, the resin of the coating layer may contain a lubricant.
According to the resin-coated cork stopper of the present invention, since the resin of the coating layer contains a lubricant, it is easy to control the friction coefficient of the surface of the coating layer, and a stable plug opening property is obtained.

本発明によれば、コルク栓特有のシール性を維持しながら、より安定した開栓性を備える樹脂被覆コルク栓が提供される。   ADVANTAGE OF THE INVENTION According to this invention, the resin coating cork stopper provided with the more stable opening property is provided, maintaining the sealing performance peculiar to a cork stopper.

本発明に係る樹脂被覆コルク栓の一実施形態を示す概略的縦断面図である。It is a schematic longitudinal cross-sectional view which shows one Embodiment of the resin coating cork stopper which concerns on this invention. 同コルク栓の製造方法の概略を示すフロー図である。It is a flowchart which shows the outline of the manufacturing method of the cork stopper. 本発明の樹脂被覆コルク栓を、締め代１．５ｍｍで中空筒部に圧入した場合の含水分の違いによる圧縮応力の測定結果を、従来の樹脂被覆コルク栓による同測定結果と比較して示す図である。The measurement result of the compressive stress due to the difference in moisture content when the resin-coated cork stopper of the present invention is press-fitted into the hollow cylinder portion with a tightening margin of 1.5 mm is shown in comparison with the same measurement result by the conventional resin-coated cork stopper. FIG.

以下に本発明の実施の形態について、図面を参照して説明する。図１は、本発明に係る樹脂被覆コルク栓の一実施形態を示している。図示の樹脂被覆コルク栓１は、コルク粒をバインダー樹脂と共に圧縮成型した柱状のコルク栓本体２と、該コルク栓本体２の軸Ｌ方向一端部２ａ側から他端部２ｂを含む外周面に被覆された樹脂被覆層３と、コルク栓本体の一端部２ａに一体とされた傘部５とよりなる。前記コルク栓本体２と樹脂被覆層３とによりコア部４が構成される。前記コルク栓本体２は、求心方向に圧縮成型されたものであって、前記一端部２ａ側から軸Ｌ方向に沿って他端部２ｂ側に向け形成された前記傘部５を取付けるための取付用穴部２０を備える。前記コア部４における前記取付用穴部２０の底部２０ａに対応する部位から前記他端部２ｂにかけての部分には、他の部分の外径より大きい外径の膨大部４１を有している。前記取付用穴部２０の底部２０ａは凹曲状に形成され、図示の符号２０ｂは、この凹曲状底部２０ａの凹曲起点部を示している。前記膨大部４１は、前記コア部４における当該起点部２０ｂに対応する部位から前記他端部２ｂにかけての部分に形成されている。   Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a resin-coated cork stopper according to the present invention. The illustrated resin-coated cork stopper 1 covers a columnar cork stopper main body 2 in which cork grains are compression-molded together with a binder resin, and an outer peripheral surface including the other end 2b from the one end 2a side in the axis L direction of the cork stopper main body 2. The resin coating layer 3 and the umbrella portion 5 integrated with the one end portion 2a of the cork stopper body. The cork stopper body 2 and the resin coating layer 3 constitute a core portion 4. The cork stopper body 2 is compression-molded in the centripetal direction, and is an attachment for attaching the umbrella portion 5 formed from the one end portion 2a side to the other end portion 2b side along the axis L direction. A working hole 20 is provided. A portion from the portion corresponding to the bottom 20a of the mounting hole 20 in the core portion 4 to the other end 2b has a large portion 41 having an outer diameter larger than the outer diameter of the other portion. The bottom 20a of the mounting hole 20 is formed in a concavely curved shape, and the reference numeral 20b shown in the figure indicates the concave bent starting point of the concavely curved bottom 20a. The enormous part 41 is formed in a part from the part corresponding to the starting point part 20b in the core part 4 to the other end part 2b.

前記傘部５は、ガラス製で、円板状の傘部本体５０と、該傘部本体５０の中央部に垂直下向きに突設された柱状の突部５１とからなる。突部５１は、前記コルク栓本体２の取付用穴部２０に、傘部本体５０の下面が前記コルク栓本体２の上面に当接するよう圧入され、この当接面と圧入面とに接着剤が塗布されて前記コルク栓本体２と傘部５とが固着一体とされる。コルク栓本体２の外周部分には、前記傘部本体５０の下面に接するように、ポリエチレン製のワッシャ６が嵌められている。このワッシャ６は、当該樹脂被覆コルク栓１を、ウイスキー等の容器７（２点鎖線部）の口部（中空筒部）７０にコア部４を圧入して閉栓したとき、口部７０の上端開口縁部７０ａと、傘部本体５０の下面との間に介在し、開口縁部７０ａと傘部本体５０の下面との直接的な当接を回避する。特に、容器７０がガラス製である場合、ガラス同士の当たりがなく、需要者は不快感を伴うことなく閉栓作業を行うことができる。
なお、図１を用いた説明において、前記一端部２ａ側を上、前記他端部２ｂ側を下として説明する。また、傘部５をガラス製としたが、硬質の樹脂製、或いは金属製であっても良い。また、図１では、膨大部４１や容器７の口部７０の形状を、説明の便宜上、実際の形状より誇張して表している。 The umbrella portion 5 is made of glass and includes a disk-shaped umbrella portion main body 50 and a columnar protrusion 51 that protrudes vertically downward from the central portion of the umbrella portion main body 50. The protrusion 51 is press-fitted into the mounting hole 20 of the cork stopper main body 2 so that the lower surface of the umbrella main body 50 comes into contact with the upper surface of the cork stopper main body 2, and an adhesive is applied to the contact surface and the press-fitting surface. Is applied so that the cork stopper body 2 and the umbrella portion 5 are fixedly integrated. A polyethylene washer 6 is fitted to the outer peripheral portion of the cork stopper main body 2 so as to contact the lower surface of the umbrella body 50. The washer 6 is configured such that when the resin-coated cork stopper 1 is plugged into the mouth part (hollow cylinder part) 70 of a container 7 (two-dot chain line part) such as whiskey, the upper end of the mouth part 70 is closed. It is interposed between the opening edge 70a and the lower surface of the umbrella body 50, and avoids direct contact between the opening edge 70a and the lower surface of the umbrella body 50. In particular, when the container 70 is made of glass, there is no contact between the glasses, and the consumer can perform the closing operation without causing discomfort.
In the description with reference to FIG. 1, the one end portion 2a side is described as the upper side and the other end portion 2b side is described as the lower side. Moreover, although the umbrella part 5 was made of glass, it may be made of hard resin or metal. Moreover, in FIG. 1, the shape of the enormous part 41 and the mouth part 70 of the container 7 is exaggerated from an actual shape for convenience of explanation.

前記樹脂被覆コルク栓１を製造する要領について、図２をも参照して説明する。先ず、工程Ｓ１において、コルク粒とバインダーとの混練物の生成を行う。コルク粒としては、天然のコルク樹皮を破砕して整粒したものが用いられる。また、バインダーとしては、樹脂接着剤が用いられる。次に、工程Ｓ２において、コルク栓本体２の作成がなされる。このコルク栓本体２の作成は、工程Ｓ１で得られた混練物を、例えば、前記特許文献５に開示された方法に基づき、求心方向（コルク栓本体２の軸Ｌに直交する方向）に圧縮成型することによってなされる。得られたコルク栓本体２は、求心方向に圧縮成型されたものであるから、前述のように径方向に優れた柔軟性を保有すると共に、バインダー樹脂の結合力とが相俟って前記軸Ｌに沿った方向に大きな強度を有する。次いで、工程Ｓ３において、コルク栓本体２に対して取付用穴部２０を形成する。この取付用穴部２０の形成は、コルク栓本体２の前記一端部２ａ側（図１では上側）から軸Ｌ方向に沿って他端部２ｂ側に刳り貫くように削設することによってなされる。   The point which manufactures the said resin-coated cork stopper 1 is demonstrated with reference also to FIG. First, in step S1, a kneaded product of cork grains and a binder is generated. As the cork grain, natural cork bark is crushed and sized. A resin adhesive is used as the binder. Next, in step S2, the cork stopper body 2 is created. The cork stopper main body 2 is produced by compressing the kneaded material obtained in step S1 in the centripetal direction (direction perpendicular to the axis L of the cork stopper main body 2) based on, for example, the method disclosed in Patent Document 5. It is done by molding. Since the obtained cork stopper body 2 is compression-molded in the centripetal direction, it has excellent flexibility in the radial direction as described above, and combined with the binding force of the binder resin, the shaft Large strength in the direction along L. Next, in step S <b> 3, the mounting hole 20 is formed in the cork stopper main body 2. The mounting hole 20 is formed by cutting from the one end 2a side (upper side in FIG. 1) of the cork stopper main body 2 so as to penetrate the other end 2b side along the axis L direction. .

工程Ｓ４において、コルク栓本体２の前記一端部２ａ側から他端部２ｂを含む外周面（以下、周面と言う）に樹脂被覆層３を形成する。この樹脂被覆層３の形成において、先ず、前記コルク栓本体２の前記周面に、ウレタン系接着剤を塗布する。そして、加熱した状態のポリエチレンテレフタレートフィルムを前記コルク栓本体２の前記周面に被せ、これを金型内に圧入して、ポリエチレンテレフタレートフィルムを、延伸させた状態でコルク栓本体２の前記周面に熱融着させる。これによって、前記コルク栓本体２の前記周面の全面に接着されたポリエチレンテレフタレートによる樹脂被覆層３が形成され、また、コルク栓本体２と樹脂被覆層３とからなるコア部４が構成される。この樹脂被覆層を形成する樹脂としては、飲料容器用の場合、ポチエチレンテレフタレートが、バリア性の高いこと、容器内の飲料液に対するコルクによる臭い移りの防止性が優れていること、及び、無害であり、衛生的であること、等から最も好ましく採用される。しかし、これに限定されず、ポリエチレン、ナイロン、ポリブチレンテレフタレート、エチレン・酢酸ビニル共重合体等も好ましく採用される。これらは、用途に応じ適宜選択採用される。また、前記被覆層３の樹脂に、滑剤が含有されていることが望ましい。この滑剤としては、球状のシリコーン樹脂や球状のポリエチレン樹脂等の樹脂系滑剤、或いは、シリカ、クレー、タルク等の無機系滑剤が好ましく採用される。   In step S4, the resin coating layer 3 is formed on the outer peripheral surface (hereinafter referred to as the peripheral surface) including the other end 2b from the one end 2a side of the cork stopper main body 2. In the formation of the resin coating layer 3, first, a urethane adhesive is applied to the peripheral surface of the cork stopper body 2. Then, the polyethylene terephthalate film in a heated state is covered on the peripheral surface of the cork stopper main body 2, and this is press-fitted into a mold, and the polyethylene terephthalate film is stretched, and the peripheral surface of the cork stopper main body 2 is stretched. Heat-sealed. As a result, a resin coating layer 3 made of polyethylene terephthalate adhered to the entire surface of the peripheral surface of the cork stopper main body 2 is formed, and a core portion 4 composed of the cork stopper main body 2 and the resin coating layer 3 is formed. . As a resin for forming this resin coating layer, in the case of beverage containers, polyethylene terephthalate has a high barrier property, is excellent in prevention of odor transfer by cork to the beverage liquid in the container, and harmless It is most preferably employed because it is hygienic. However, the present invention is not limited to this, and polyethylene, nylon, polybutylene terephthalate, ethylene / vinyl acetate copolymer and the like are also preferably employed. These are appropriately selected and adopted according to the application. Moreover, it is desirable that the resin of the coating layer 3 contains a lubricant. As this lubricant, a resin lubricant such as a spherical silicone resin or a spherical polyethylene resin, or an inorganic lubricant such as silica, clay, or talc is preferably employed.

さらに、工程Ｓ５において、前記コア部４における前記取付用穴部２０における底部２０ａの起点部２０ｂから、前記他端部２ｂ側の側周面（図１におけるゾーンＺ１）にシリコーンを塗布して、加熱する。この加熱によってコア部４の前記ゾーンＺ１にシリコーンの被膜が形成される。また、この加熱に伴い、コルク栓本体２の前記ゾーンＺ１に相当する部位が熱膨張するが、この部分は実質的に中実状であり、しかも、コルク栓本体２が求心方向に圧縮成型されたものであるから、熱膨張はこの部分を拡径するよう作用し、図１に示すようにコア部４のゾーンＺ１に相当する部位に膨大部４１が形成される。このように、シリコーン被膜の形成に伴い、膨大部４１を形成した後、工程Ｓ６において、前記ワッシャ６を所定位置に嵌めた上で、傘部５の取付がなされる。この傘部５の取付は、前記コルク栓本体２の上端面（上端部）２ａと、傘部５の突部５１の周面に接着剤を塗布した後、突部５１を取付用穴部２０に前記のように圧入し、接着剤を硬化させることによってなされる。これによって、樹脂被覆コルク栓１の製造工程が終了する。
なお、工程Ｓ５で、シリコーンを塗布して加熱するようにしているが、シリコーン塗布を省略して、単に加熱をするだけでも良い。 Further, in step S5, silicone is applied to the side peripheral surface (zone Z1 in FIG. 1) on the other end 2b side from the starting portion 20b of the bottom portion 20a in the mounting hole 20 in the core portion 4, Heat. By this heating, a silicone film is formed in the zone Z1 of the core 4. Further, with this heating, the portion corresponding to the zone Z1 of the cork stopper main body 2 is thermally expanded, but this portion is substantially solid, and the cork stopper main body 2 is compression-molded in the centripetal direction. Therefore, the thermal expansion acts to expand the diameter of this portion, and the enormous portion 41 is formed in a portion corresponding to the zone Z1 of the core portion 4 as shown in FIG. Thus, after forming the enormous part 41 with the formation of the silicone coating, the umbrella part 5 is attached after the washer 6 is fitted in a predetermined position in step S6. The attachment of the umbrella portion 5 is performed by applying an adhesive to the upper end surface (upper end portion) 2a of the cork stopper body 2 and the peripheral surface of the protrusion 51 of the umbrella portion 5, and then attaching the protrusion 51 to the mounting hole 20. And pressing the adhesive as described above to cure the adhesive. Thereby, the manufacturing process of the resin-coated cork stopper 1 is completed.
In step S5, silicone is applied and heated, but silicone application may be omitted and heating may be performed.

前記の樹脂被覆コルク栓１の製造において、ウイスキー用等の飲料容器のコルク栓に求められる締め代が通常１．５ｍｍであることから、前記コア部４における膨大部４１以外の円柱状部分４０の外径Ｄ１が、前記容器７における口部７０の内径面７０ｂの最小内径Ｄ２より１．５ｍｍ大きくなるよう設定される。即ち、当該樹脂被覆コルク栓１を図１に示す容器７の口部７０に圧入して閉栓した時には、前記円柱状部分４０は、該口部７０の２点鎖線で示す内径面７０ｂの形状に沿うよう圧縮弾性変形する。この弾性変形による復元弾力により、口部７０の内径面７０ｂと前記円柱状部分４０とが相互に弾接し、この部分が密封され、容器７内の液体の外部への漏出が防止される。コルク栓本体２の前記周面には、樹脂被覆層３が被覆されているから、コルク臭が容器７内の飲料に移ることが防止される。また、口部７０の内径面７０ｂと前記円柱状部分４０との相互の弾接部分には樹脂被覆層３が介在されるから、これによって、前記密封性がより的確に発揮される。さらに、樹脂被覆層３の樹脂に前記滑剤を含有させて、口部７０の内径面７０ｂとの摩擦抵抗をコントロールするようにすれば、後記する閉栓時の圧縮応力の調整がし易く、安定した開栓性が得られる。   In manufacture of the said resin-coated cork stopper 1, since the fastening margin calculated | required by the cork stopper of drink containers for whiskey etc. is 1.5 mm normally, the column-shaped part 40 other than the enormous part 41 in the said core part 4 is used. The outer diameter D1 is set to be 1.5 mm larger than the minimum inner diameter D2 of the inner diameter surface 70b of the mouth portion 70 in the container 7. That is, when the resin-coated cork stopper 1 is press-fitted into the mouth portion 70 of the container 7 shown in FIG. 1 and closed, the cylindrical portion 40 has the shape of the inner diameter surface 70b indicated by the two-dot chain line of the mouth portion 70. Compressive elastic deformation along. Due to the restoring elasticity due to this elastic deformation, the inner diameter surface 70b of the mouth portion 70 and the cylindrical portion 40 are in elastic contact with each other, and this portion is sealed, and leakage of the liquid in the container 7 to the outside is prevented. Since the peripheral surface of the cork stopper main body 2 is coated with the resin coating layer 3, the cork odor is prevented from being transferred to the beverage in the container 7. Moreover, since the resin coating layer 3 is interposed in the mutual elastic contact portion between the inner diameter surface 70b of the mouth portion 70 and the cylindrical portion 40, the sealing performance is thereby more accurately exhibited. Furthermore, if the resin is added to the resin of the resin coating layer 3 to control the frictional resistance with the inner diameter surface 70b of the mouth portion 70, it is easy to adjust the compression stress at the time of closing, which will be described later, and is stable. Openability is obtained.

前記のような方法で作製される樹脂被覆コルク栓や、前記特許文献１，２，４に記載された従来の樹脂被覆コルク栓は、作製当初において、およそ２．０重量％の水分を含み（含水分）、その後の置かれる環境等によって、含水分が２．０重量％〜６．０重量％の範囲で変動する。そして、この含水分の変動に伴い、容器の口部に圧入して閉栓した際の圧縮応力も変動する。図３は、本発明の樹脂被覆コルク栓を、締め代１．５ｍｍで中空筒部に圧入した場合の含水分の違いによる圧縮応力の測定結果を、従来の樹脂被覆コルク栓による同測定結果と比較して示している。図３において、軸方向（縦方向）圧縮品は、コルク粒をバインダーと共に軸方向に圧縮成型して柱状体とし、この周面に樹脂被覆したもので、前記従来の樹脂被覆コルク栓に相当する。また、径方向（求心方向）圧縮品は特許文献５に記載された方法によって得た柱状体の周面に樹脂被覆したもので、本発明の樹脂被覆コルク栓に相当する。以下では、前者を従来品、後者を本発明品という。   The resin-coated cork stopper produced by the method as described above and the conventional resin-coated cork stoppers described in Patent Documents 1, 2, and 4 contain approximately 2.0% by weight of moisture at the beginning of production ( The moisture content varies in the range of 2.0 wt% to 6.0 wt% depending on the moisture content) and the environment in which it is placed. As the moisture content fluctuates, the compressive stress when pressed into the mouth of the container and closed is also fluctuated. FIG. 3 shows the measurement results of compressive stress due to the difference in moisture content when the resin-coated cork stopper of the present invention is press-fitted into the hollow cylinder portion with a tightening margin of 1.5 mm, and the measurement results of the conventional resin-coated cork stopper Shown in comparison. In FIG. 3, the axial direction (longitudinal direction) compressed product is a product in which cork grains are compression-molded in the axial direction together with a binder to form a columnar body, and this peripheral surface is resin-coated, and corresponds to the conventional resin-coated cork stopper. . Moreover, the radial direction (centripetal direction) compressed product is a resin-coated peripheral surface of a columnar body obtained by the method described in Patent Document 5, and corresponds to the resin-coated cork stopper of the present invention. Below, the former is called a conventional product and the latter is called a product of the present invention.

図３に示すように、本発明品における含水分２．０重量％及び６．０重量％の場合の前記圧縮応力は、いずれも、従来品における含水分２．０重量％及び６．０重量％の場合の前記圧縮応力より低く、本発明品の開栓性が従来品より優れていることが理解される。また、含水分２．０重量％⇔６．０重量％間の圧縮応力の変動量は、本発明品の方が従来品より小さい。従って、置かれる環境の違い（例えば、季節の変化）によって、開栓性の変化が本発明品の方が従来品より小さく、コルク栓としての適性において、本発明品の方が従来品より好ましいことも理解される。   As shown in FIG. 3, the compressive stress when the moisture content is 2.0% by weight and 6.0% by weight in the product of the present invention is 2.0% by weight and 6.0% by weight, respectively. %, It is understood that the opening performance of the product of the present invention is superior to that of the conventional product. In addition, the amount of change in compressive stress between 2.0% by weight and 6.0% by weight of the moisture content of the product of the present invention is smaller than that of the conventional product. Therefore, due to differences in the environment in which it is placed (for example, seasonal changes), the product of the present invention has a smaller change in opening performance than the conventional product, and the present product is more preferable than the conventional product in terms of suitability as a cork stopper. It is also understood.

本発明者等は、このような検証を、含水分が２．０重量％〜６．０重量％の範囲で種々実施し、その結果、シール性、開栓性、栓飛び性の観点から、前記コア部を締め代１．５ｍｍで中空筒部に圧入する場合において、該コア部の含水分が６重量％時における圧縮応力が、１００〜３００Ｎであり、且つ、該コア部の含水分が２重量％時における圧縮応力より１００〜１５０Ｎ小さいことが望ましいとの知見を得た。また、このような本発明の樹脂被覆コルク栓の優れた特性は、コルク栓本体が求心方向に圧縮成型されたものであることに基づくものであり、コア部表面の摩擦係数の調整もし易く、前記従来の樹脂被覆コルク栓では得られない特性であることも判明した。   The inventors have conducted such verification in various ways with a moisture content in the range of 2.0% by weight to 6.0% by weight, and as a result, from the viewpoint of sealing performance, opening performance, and plug skipping performance, When the core part is press-fitted into the hollow cylinder part with a tightening margin of 1.5 mm, the compressive stress when the moisture content of the core part is 6% by weight is 100 to 300 N, and the moisture content of the core part is The knowledge that it is desirable that it is smaller by 100 to 150 N than the compressive stress at the time of 2% by weight was obtained. In addition, the excellent characteristics of the resin-coated cork stopper of the present invention is based on the fact that the cork stopper main body is compression-molded in the centripetal direction, and it is easy to adjust the friction coefficient of the core surface, It has also been found that this characteristic cannot be obtained with the conventional resin-coated cork stopper.

また、樹脂被覆コルク栓１の容器７に対する閉栓状態では、図１に示すように、膨大部４１の一部は、容器７の口部７０から容器本体部（図示省略）に向かい漸次径大化する肩部分７１の内面に当接乃至弾接するよう設定される。この膨大部４１の肩部分７１の内面に対する当接乃至弾接によって、膨大部４１と肩部分７１とにアンカー効果が発現されていわゆる栓飛びの発生が抑制され、当該樹脂被覆コルク栓１の閉栓状態が安定に維持される。一方、樹脂被覆コルク栓１を閉栓及び開栓する際、膨大部４１は、前記口部７０における内径面７０ｂの最小内径Ｄ２を通過するので、この時求心方向に大きく弾性圧縮され、この弾性圧縮の反力により、閉栓及び開栓操作に強い力を必要とする。この閉栓及び開栓の操作性と、前記栓飛び防止性とを勘案し、膨大部４１の膨大幅（（膨大部４１の最大外径Ｄ３）−（円柱状部分４０の外径Ｄ１）の１／２）は、０．１〜０．３ｍｍが好適とされる。因みに、膨大部４１の膨大幅が０．１ｍｍ未満になると栓飛び防止機能が低下する傾向となる。また、膨大部４１の膨大幅が０．３ｍｍを超えると、前記閉栓及び開栓操作時に操作者の手指にかかる負担が大きくなる傾向となる。さらに、膨大部４１の表面（前記ゾーンＺ１）には、シリコーンの被膜が形成されているから、前記閉栓及び開栓操作の円滑性が向上すると共に、閉栓及び開栓操作時のいわゆる鳴きの発生が抑えられる。   In the closed state of the resin-coated cork stopper 1 with respect to the container 7, as shown in FIG. 1, a part of the enormous portion 41 gradually increases in diameter from the mouth portion 70 of the container 7 toward the container main body (not shown). It is set so as to abut or elastically contact the inner surface of the shoulder portion 71. By contacting or elastically contacting the inner surface of the shoulder portion 71 of the bulge portion 41, an anchor effect is exerted on the bulge portion 41 and the shoulder portion 71, and so-called plug jumping is suppressed, and the resin-coated cork stopper 1 is closed. The state is kept stable. On the other hand, when the resin-coated cork stopper 1 is closed and opened, the enormous part 41 passes through the minimum inner diameter D2 of the inner diameter surface 70b of the mouth part 70, and is therefore greatly elastically compressed in the centripetal direction. Because of this reaction force, a strong force is required for closing and opening operation. Considering the operability of closing and opening and the prevention of plug skipping, 1 of the enormous width of the enormous portion 41 ((the maximum outer diameter D3 of the enormous portion 41) − (the outer diameter D1 of the cylindrical portion 40)) / 2) is preferably 0.1 to 0.3 mm. Incidentally, when the enormous width of the enormous portion 41 is less than 0.1 mm, the stopper skip prevention function tends to be lowered. Further, if the enormous width of the enormous portion 41 exceeds 0.3 mm, the burden on the operator's finger tends to increase during the closing and opening operation. Further, since a silicone film is formed on the surface of the enormous portion 41 (the zone Z1), the smoothness of the closing and opening operation is improved, and so-called squeal is generated during the closing and opening operation. Is suppressed.

前記膨大部４１は、前述のとおり、前記コア部４における前記取付用穴部２０の起点部２０ｂに対応する部位から前記他端部２ｂにかけての部分、即ち、ゾーンＺ１の全体に亘って形成されている。これによって、膨大部４１の最大外径Ｄ３が円柱状部分４０の外径Ｄ１より大とされるが、加えて、膨大部４１における前記取付用穴部２０の底部２０ａの最深部に対応する部分の外径Ｄ４との関係においては、Ｄ３＞Ｄ４＞Ｄ１とされる。しかし、前記取付用穴部２０の底部２０ａの最深部に対応する部分から前記他端部２ｂにかけての部分（ゾーンＺ２）に膨大部４１が形成されていても良い。ゾーンＺ２に膨大部４１を形成する場合、前記工程Ｓ５において、当該ゾーンＺ２にシリコーンを塗布して、この部分を加熱するか、シリコーンを塗布することなくこの部分を加熱することによって、前記と同様に、熱膨張によりゾーンＺ２に膨大部４１が形成される。   As described above, the enormous portion 41 is formed over a portion from the portion corresponding to the starting portion 20b of the mounting hole 20 in the core portion 4 to the other end 2b, that is, the entire zone Z1. ing. As a result, the maximum outer diameter D3 of the enlarged portion 41 is made larger than the outer diameter D1 of the cylindrical portion 40. In addition, the portion corresponding to the deepest portion of the bottom portion 20a of the mounting hole portion 20 in the enlarged portion 41. In relation to the outer diameter D4, D3> D4> D1. However, the enormous portion 41 may be formed in a portion (zone Z2) from the portion corresponding to the deepest portion of the bottom portion 20a of the mounting hole portion 20 to the other end portion 2b. In the case where the enormous portion 41 is formed in the zone Z2, in the step S5, silicone is applied to the zone Z2, and this portion is heated, or this portion is heated without applying silicone. Furthermore, the enormous part 41 is formed in the zone Z2 by thermal expansion.

なお、前記の実施形態では、ウイスキー用容器の樹脂被覆コルク栓について述べたが、これに限らず、ブランデー、ワイン、シャンペン、日本酒、或いは各種ジュース等の飲料用容器に適用することも可能である。また、図１において、樹脂被覆コルク栓１の形状は一例を示すものであり、これに限定されるものではない。特に、コア部４が、膨大部４１を有するものを例示したが、コア部４の含水分と圧縮応力とが前記のような関係である限り、膨大部４１を有さない直状体からなるものであっても良い。さらに、前記の実施形態では、コア部の含水分と圧縮応力との前記特定された関係による前記優れた特性が、コルク栓本体が求心方向に圧縮成型されたものであることに基づくものとしたが、他の圧縮成型等によって、コア部の含水分と圧縮応力との前記特定された関係による前記優れた特性が得られる場合も含まれる。   In the above-described embodiment, the resin-coated cork stopper of the whiskey container has been described. However, the present invention is not limited thereto, and can be applied to beverage containers such as brandy, wine, champagne, sake, or various juices. . Moreover, in FIG. 1, the shape of the resin-coated cork stopper 1 shows an example, and is not limited to this. In particular, the core portion 4 is exemplified as having the enormous portion 41, but as long as the moisture content of the core portion 4 and the compressive stress are in the relationship as described above, the core portion 4 is made of a straight body having no enormous portion 41. It may be a thing. Furthermore, in the said embodiment, the said outstanding characteristic by the said specific relationship of the moisture content of a core part and a compressive stress was based on the cork stopper main body being what was compression-molded in the centripetal direction. However, the case where the above-mentioned excellent characteristics due to the specified relationship between the moisture content of the core portion and the compressive stress is obtained by other compression molding or the like is also included.

１ 樹脂被覆コルク栓
２ コルク栓本体
２ａ 一端部
２ｂ 他端部
２０ 取付用穴部
２０ａ 底部
３ 樹脂被覆層
４ コア部
４１ 膨大部
５ 傘部
７０ 容器の口部（中空筒部）
Ｌ 軸 DESCRIPTION OF SYMBOLS 1 Resin-coated cork stopper 2 Cork stopper main body 2a One end part 2b Other end part 20 Mounting hole part 20a Bottom part 3 Resin coating layer 4 Core part 41 Enlarged part 5 Umbrella part 70 Container mouth part (hollow cylinder part)
L axis

Claims (7)

コルク粒をバインダー樹脂と共に圧縮成型した柱状のコルク栓本体と、該コルク栓本体の軸方向一端部側から他端部を含む外周面に被覆された樹脂被覆層とを含む樹脂被覆コルク栓において、
前記コルク栓本体と樹脂被覆層とによりコア部を構成し、
前記コア部を締め代１．５ｍｍで中空筒部に圧入する場合において、該コア部の含水分が６重量％時における圧縮応力が、１００〜３００Ｎであり、且つ、該コア部の含水分が２重量％時における圧縮応力より１００〜１５０Ｎ小さいことを特徴とする樹脂被覆コルク栓。 In a resin-coated cork stopper comprising a columnar cork stopper main body obtained by compression-molding cork grains together with a binder resin, and a resin coating layer coated on an outer peripheral surface including the other end from one axial end of the cork stopper main body.
The core part is constituted by the cork stopper body and the resin coating layer,
When the core part is press-fitted into the hollow cylinder part with a tightening margin of 1.5 mm, the compressive stress when the moisture content of the core part is 6% by weight is 100 to 300 N, and the moisture content of the core part is A resin-coated cork stopper characterized by being 100 to 150 N smaller than the compressive stress at 2% by weight. 請求項１に記載の樹脂被覆コルク栓において、
前記コルク栓本体が、求心方向に圧縮成型されたものであることを特徴とする樹脂被覆コルク栓。 In the resin-coated cork stopper according to claim 1,
The resin-coated cork stopper, wherein the cork stopper body is compression-molded in a centripetal direction. 請求項１又は請求項２に記載の樹脂被覆コルク栓において、
前記コルク栓本体が、前記一端部側から軸方向に沿って他端部側に向け形成された傘部を取付けるための取付用穴部を備えていることを特徴とする樹脂被覆コルク栓。 In the resin-coated cork stopper according to claim 1 or 2,
The resin-coated cork stopper, wherein the cork stopper main body includes an attachment hole for attaching an umbrella part formed from the one end side toward the other end side along the axial direction. 請求項３に記載の樹脂被覆コルク栓において、
前記コア部における前記取付用穴部の底部に対応する部位から前記他端部にかけての部分に、他の部分の外径より大きい膨大部を有していることを特徴とする樹脂被覆コルク栓。 In the resin-coated cork stopper according to claim 3,
A resin-coated cork stopper having a large portion larger than an outer diameter of another portion in a portion from the portion corresponding to the bottom of the mounting hole portion in the core portion to the other end portion. 請求項４に記載の樹脂被覆コルク栓において、
前記膨大部が、前記コア部を加熱することにより形成されたものであることを特徴とする樹脂被覆コルク栓。 In the resin-coated cork stopper according to claim 4,
The resin-coated cork stopper, wherein the enormous portion is formed by heating the core portion. 請求項１〜請求項５のいずれか一項に記載の樹脂被覆コルク栓において、
前記樹脂被覆層が、ポリエチレンテレフタレートからなることを特徴とする樹脂被覆コルク栓。 In the resin-coated cork stopper according to any one of claims 1 to 5,
The resin-coated cork stopper, wherein the resin coating layer is made of polyethylene terephthalate. 請求項１〜請求項６のいずれか一項に記載の樹脂被覆コルク栓において、
前記被覆層の樹脂が、滑剤を含有していることを特徴とする樹脂被覆コルク栓。 In the resin-coated cork stopper according to any one of claims 1 to 6,
The resin-coated cork stopper, wherein the resin of the coating layer contains a lubricant.
JP2013257810A 2013-12-13 2013-12-13 Resin-coated cork stopper Active JP6218321B2 (en)

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ES14197571T ES2795123T3 (en) 2013-12-13 2014-12-12 Resin-coated cork stopper
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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9908665B2 (en) * 2009-12-23 2018-03-06 Daniel L. Garcia Reusable bottle cap having identification means
FR3031970B1 (en) 2015-01-23 2019-08-16 Au Liegeur-Ets J.Pontneau Denis CYLINDRICAL BOX WITH CORK CLUTCH DEVICE
JP6956404B2 (en) * 2017-09-19 2021-11-02 内山工業株式会社 Manufacturing method of cork stopper and cork stopper
KR101961677B1 (en) * 2018-08-29 2019-03-25 하원태 Shoe sole or insole with cork sheet and manufacturing method
WO2021162984A1 (en) * 2020-02-13 2021-08-19 West Pharmaceutical Services, Inc. Containment and delivery systems for cryogenic storage

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809990A (en) * 1956-09-14 1959-03-04 Albin Mayr Improvements in or relating to bottle closures and device for the manufacture of the bottle
JPS472691Y1 (en) * 1968-05-08 1972-01-28
US3984022A (en) * 1974-09-12 1976-10-05 Le Bouchage Mecanique Bottle stopper
JPH0585555A (en) * 1991-08-26 1993-04-06 Nagayanagi Kogyo Kk Production of cork plug by synthetic resin-binded material
JPH05293051A (en) * 1991-09-12 1993-11-09 Frank Murray Plug for opening of container
JP2003054595A (en) * 2001-08-20 2003-02-26 Uchiyama Mfg Corp Cork plug
WO2004020300A1 (en) * 2002-08-30 2004-03-11 Suntory Limited Plug for container and method of producing the same
JP2005225529A (en) * 2004-02-13 2005-08-25 Suntory Ltd Container plug and its manufacturing method
US20070203266A1 (en) * 2004-01-23 2007-08-30 Jeannie Holmes Synthetic cork compound
JP2010099909A (en) * 2008-10-23 2010-05-06 Uchiyama Manufacturing Corp Cork stopper, method of manufacturing cork stopper, and molding device for manufacturing cork stopper
WO2011155515A1 (en) * 2010-06-09 2011-12-15 内山工業株式会社 Cork stopper and production method therefor

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US706634A (en) * 1900-06-08 1902-08-12 Arthur Blumer Stopper for bottles.
US3001659A (en) * 1959-10-16 1961-09-26 Lok Seal Inc Bottle closure with cork
JPS63147456U (en) 1987-03-17 1988-09-28
JPH03140231A (en) * 1989-10-26 1991-06-14 Nissho Corp Rubber plug for vial
JPH086033B2 (en) * 1990-07-13 1996-01-24 信越化学工業株式会社 Room temperature curable organopolysiloxane composition for cork granule binder, cured cork granule and molding stopper
US6221451B1 (en) * 1997-04-24 2001-04-24 Nomacorc, Llc Synthetic closure
US5904965A (en) * 1997-04-24 1999-05-18 Nomaco, Inc. Synthetic closure
US7770747B2 (en) * 1997-04-24 2010-08-10 Nomacorc, Llc Synthetic closure
US6221450B1 (en) * 1997-09-17 2001-04-24 Nomacorc, Llc Synthetic closure
US20030161985A1 (en) * 1997-04-24 2003-08-28 Eduardo Lauer Synthetic closure
US20040178168A1 (en) * 2001-07-04 2004-09-16 Matheson Norma Catherine Container stopper
ATE465099T1 (en) * 2002-03-06 2010-05-15 Bacchus Technologies Ltd PLUG
JP2004231244A (en) 2003-01-31 2004-08-19 Uchiyama Mfg Corp Surface treatment method for cork stopper
US20080078737A1 (en) * 2006-10-02 2008-04-03 Brennan Christopher H Unique wine flavor protector
US20090039052A1 (en) * 2007-08-06 2009-02-12 Antonio Martin Galvez-Ramos Plastic cap protector for bottle corks
AU2013204654B2 (en) * 2012-06-08 2016-07-07 Nomacorc Llc Closure for a product-Retaining Container
AU2013205007B2 (en) * 2013-02-02 2016-05-26 Nomacorc Llc Closure for a product-retaining container
WO2015031640A2 (en) * 2013-08-29 2015-03-05 Bolger David V Container closure device
US9211977B2 (en) * 2013-08-30 2015-12-15 Jack E. Elder Bottle closure having a wood top

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB809990A (en) * 1956-09-14 1959-03-04 Albin Mayr Improvements in or relating to bottle closures and device for the manufacture of the bottle
JPS472691Y1 (en) * 1968-05-08 1972-01-28
US3984022A (en) * 1974-09-12 1976-10-05 Le Bouchage Mecanique Bottle stopper
JPH0585555A (en) * 1991-08-26 1993-04-06 Nagayanagi Kogyo Kk Production of cork plug by synthetic resin-binded material
JPH05293051A (en) * 1991-09-12 1993-11-09 Frank Murray Plug for opening of container
JP2003054595A (en) * 2001-08-20 2003-02-26 Uchiyama Mfg Corp Cork plug
WO2004020300A1 (en) * 2002-08-30 2004-03-11 Suntory Limited Plug for container and method of producing the same
US20070203266A1 (en) * 2004-01-23 2007-08-30 Jeannie Holmes Synthetic cork compound
JP2005225529A (en) * 2004-02-13 2005-08-25 Suntory Ltd Container plug and its manufacturing method
JP2010099909A (en) * 2008-10-23 2010-05-06 Uchiyama Manufacturing Corp Cork stopper, method of manufacturing cork stopper, and molding device for manufacturing cork stopper
WO2011155515A1 (en) * 2010-06-09 2011-12-15 内山工業株式会社 Cork stopper and production method therefor

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EP2883809B1 (en) 2020-03-25
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