JP2008094448A

JP2008094448A - Lid having low torque and high sealability, and mounted with packing

Info

Publication number: JP2008094448A
Application number: JP2006279693A
Authority: JP
Inventors: Kiyoshi Wada; 潔和田; Nobukazu Fujiwara; 伸数藤原; Kazuyuki Hiraoka; 和幸平岡
Original assignee: Toppan Printing Co Ltd
Current assignee: Toppan Inc
Priority date: 2006-10-13
Filing date: 2006-10-13
Publication date: 2008-04-24

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid having a low torque and high sealability, and mounted with packing, which is capable of attaining a high sealability under a low cap closing torque. <P>SOLUTION: A lid 220 having a packing 100 inserted and fitted to the lower surface of an inner top plate 221 and threadably fitted to an opening part of a container body 210 is configured so that a packing receptacle ring 222 having a predetermined width and connected to the inner peripheral surface of the upper end of the peripheral wall 224 is provided on the lower surface of a peripheral edge of the top plate of the lid, the packing is made of a laminated sheet, its upper-most layer is a crystalline polyethylene terephthalate film layer 110, it has a foamed sheet layer 130 at an intermediate layer, and there is provided a packing abutment ring of predetermined height at the lower surface of the inner top plate of the packing receptacle as required. In addition, a plurality of slip improvement rings having V-shaped cross-section are concentrically provided on the lower surface of the packing receptacle ring at predetermined intervals, or the lower surface of the packing receptacle ring is applied with texturing. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、プラスチック容器、ガラス瓶などの口部に螺合して装着する低トルク高密封パッキン挿着蓋に関するものである。 The present invention relates to a low-torque, high-sealing packing insertion lid that is screwed into a mouth of a plastic container, a glass bottle, or the like.

従来、食品や非食品の内容物を収納するプラスチック容器やガラス瓶などの口部には、密封性を良好にするために、内側の天板下にパッキンを挿着した蓋が螺着されていた。そして、このパッキンには、低閉栓トルクで高密封を得るために、パッキンの外面にシリコンを塗布して滑りを向上させたもの、材質に柔軟性で滑りが良いポリエチレンシートを用いたもの、滑りが良いアモルファスポリエチレンテレフタレートフィルムを表面に用いたものなどが使用されていた。なお、高い閉栓トルクで容器口部に蓋を螺着すると、使用するときに、高い開栓トルクを必要とし開栓しにくいことがあった。 Conventionally, a lid with a packing inserted under the inner top plate has been screwed to the mouth of a plastic container or glass bottle for storing food or non-food contents. . In order to obtain a high seal with a low closing torque, this packing is made by applying silicon to the outer surface of the packing to improve the sliding, using a flexible and slipper polyethylene sheet, What used a good amorphous polyethylene terephthalate film on the surface was used. When the lid is screwed onto the container mouth with a high closing torque, a high opening torque is required and it may be difficult to open the container.

しかしながら、上述したパッキンの外面にシリコンを塗布して滑りを向上させたものは、シリコンの塗布に手間が掛かったり又閉栓位置が安定しない問題があった。また、柔軟性で滑りが良いポリエチレンシートを用いたものは、反発力に乏しく又耐久性に問題があった。また、アモルファスポリエチレンテレフタレートフィルムを表面に用いたものは、耐内容物性や充填時の耐熱性において、ポリプロピレンと比較して劣る問題があった。 However, the above-described one in which silicon is applied to the outer surface of the packing to improve the slipping has a problem that it takes time to apply the silicon and the position of the plug is not stable. Further, those using a flexible and slippery polyethylene sheet have poor repulsive force and have a problem with durability. Moreover, what used the amorphous polyethylene terephthalate film for the surface had the problem which is inferior compared with a polypropylene in the content resistance and heat resistance at the time of filling.

本発明は、上述の従来のパッキンを内側の天板下に挿着した蓋の問題点を解決したものであり、低閉栓トルクで高い密封性が得られる低トルク高密封パッキン挿着蓋を提供するものである。 The present invention solves the problem of the lid in which the above-mentioned conventional packing is inserted under the inner top plate, and provides a low-torque, high-sealing packing insertion lid that provides high sealing performance with low closing torque. To do.

すなわち、本発明の第１の発明は、内側の天板の下面にパッキンを挿着し容器本体の口部に螺着する蓋において、前記パッキンが、積層シートからなり、最上層が結晶化ポリエチレンテレフタレートフィルム層で、中間層に発泡シート層を有することを特徴とする低トルク高密封パッキン挿着蓋である。 That is, according to a first aspect of the present invention, in the lid in which the packing is inserted into the lower surface of the inner top plate and screwed into the mouth of the container body, the packing is made of a laminated sheet, and the uppermost layer is crystallized polyethylene. A low-torque, high-sealing packing insertion lid characterized by having a foamed sheet layer as an intermediate layer, which is a terephthalate film layer.

次に、本発明の第２の発明は、内側の天板の下面にパッキンを挿着し容器本体の口部に螺着する蓋において、前記蓋の天板周縁部下面に周壁上端部内周面と接続する所定幅のパッキン受台リングを設けたことを特徴とする第１の発明に記載の低トルク高密封パッキン挿着蓋である。 Next, according to a second aspect of the present invention, there is provided a lid in which packing is inserted into the lower surface of the inner top plate and screwed into the mouth portion of the container body. A low torque, high sealing packing insertion lid according to the first aspect of the present invention is provided with a packing receiving ring having a predetermined width to be connected to the ring.

次に、本発明の第３の発明は、内側の天板の下面にパッキンを挿着し容器本体の口部に螺着する蓋において、前記蓋の天板周縁部下面に周壁上端部内周面と接続する所定幅のパッキン受台リングを設け、かつ前記パッキン受台リングの内側の天板下面に所定高さのパッキン当接リングを設けたことを特徴とする第１の発明に記載の低トルク高密封パッキン挿着蓋である。 Next, according to a third aspect of the present invention, there is provided a lid in which a packing is inserted into a lower surface of an inner top plate and screwed into a mouth portion of a container main body. And a packing abutment ring having a predetermined width and a packing abutment ring having a predetermined height provided on a lower surface of the top plate inside the packing cradle ring. Torque high seal packing insertion lid.

次に、本発明の第４の発明は、前記パッキン受台リングの下面に、複数個の断面形状Ｖ字状の滑り向上リングを中心方向へ所定間隔で設けたことを特徴とする第２乃至第３の発明に記載の低トルク高密封パッキン挿着蓋である。 Next, a fourth invention of the present invention is characterized in that a plurality of V-shaped slip improvement rings are provided at predetermined intervals in the center direction on the lower surface of the packing receiving ring. It is a low-torque, high-sealing packing insertion lid described in the third invention.

そして、本発明の第５の発明は、前記パッキン受台リングの下面に、シボ加工を施した
ことを特徴とする第２乃至第３の発明に記載の低トルク高密封パッキン挿着蓋である。 According to a fifth aspect of the present invention, there is provided the low-torque, high-sealing packing insertion lid according to the second to third aspects, wherein the lower surface of the packing cradle ring is subjected to texture processing. .

本発明の低トルク高密封パッキン挿着蓋は、内側の天板の下面に、最上層が結晶化ポリエチレンテレフタレートフィルム層で、中間層に発泡シート層を有するパッキンを挿着した蓋であり、蓋の天板と当接するパッキンの最上層が結晶化ポリエチレンテレフタレートフィルム層であるため、容器本体の口部に螺着するときに、パッキンが滑りやすく、低閉栓トルクでも摺動抵抗が少ないく、また、中間層の発泡シート層はクッション性あり、この結果、高い密封力が得られ高い密封性が実現する。なお、結晶化ポリエチレンテレフタレートは、アモルファスポリエチレンテレフタレートに比較して耐内容物性が強く、また耐熱性が強い。 The low-torque, high-sealing packing insertion lid of the present invention is a lid in which a packing having a crystallized polyethylene terephthalate film layer as the uppermost layer and a foamed sheet layer as an intermediate layer is inserted on the lower surface of the inner top plate. Since the top layer of the packing that comes into contact with the top plate is a crystallized polyethylene terephthalate film layer, the packing is slippery when screwed into the mouth of the container body, and the sliding resistance is low even at low closing torque. The foam sheet layer of the intermediate layer has a cushioning property, and as a result, a high sealing force is obtained and a high sealing property is realized. Note that crystallized polyethylene terephthalate has stronger content resistance and higher heat resistance than amorphous polyethylene terephthalate.

また、蓋の天板周縁部下面に周壁上端部内周面と接続する所定幅のパッキン受台リングを設けた本発明の低トルク高密封パッキン挿着蓋は、蓋の天板とパッキンとの接触面積が小さくなるため、容器本体の口部に螺着するときに、パッキンが滑りやすくなり、低閉栓トルクでも良好な密封性が得られる。 In addition, the low torque high-sealing packing insertion lid of the present invention provided with a packing receiving ring of a predetermined width connected to the inner peripheral surface of the upper end of the peripheral wall on the lower surface of the peripheral edge of the top plate of the lid is a contact between the top plate of the lid and the packing. Since the area is small, the packing becomes slippery when screwed into the mouth of the container body, and good sealing performance can be obtained even with a low closing torque.

また、蓋の天板周縁部下面に周壁上端部内周面と接続する所定幅のパッキン受台リングを設け、広口容器など必要に応じて、このパッキン受台リングの内側の天板下面に所定高さのパッキン当接リングを設けた本発明の低トルク高密封パッキン挿着蓋は、パッキン受台リングとパッキン当接リングとによって、パッキンが常に水平状態で確保されるため、容器本体の口部に螺着するときに、パッキンが水平状態を確保して滑り、低閉栓トルクでも良好な密封性が安定して得られる。 In addition, a packing cradle ring with a predetermined width connected to the inner peripheral surface of the upper end of the peripheral wall is provided on the lower surface of the top plate peripheral edge of the lid, and a predetermined height is provided on the lower surface of the top plate inside the packing cradle ring as necessary. The low-torque, high-sealing packing insertion lid of the present invention provided with a packing abutting ring of the present invention is ensured that the packing is always in a horizontal state by the packing receiving ring and the packing abutting ring. When the screw is screwed on, the packing slides in a horizontal state, and good sealing performance can be stably obtained even with a low closing torque.

また、パッキン受台リングの下面に、複数個の断面形状Ｖ字状の滑り向上リングを中心方向へ所定間隔で設けた本発明の低トルク高密封パッキン装着蓋は、蓋の天板とパッキンとの接触面積が更に小さくなるため、容器本体の口部に螺着するときに、パッキンが滑りやすくなり、さらに低閉栓トルクでも良好な密封性が得られる。 In addition, the low torque high seal packing mounting lid of the present invention in which a plurality of V-shaped slip improvement rings are provided at a predetermined interval in the center direction on the lower surface of the packing cradle ring, the top plate of the lid, the packing, Since the contact area is further reduced, the packing becomes slippery when screwed into the mouth of the container main body, and good sealing performance can be obtained even with a low closing torque.

そして、パッキン受台リングの下面に、シボ加工を施した本発明の低トルク高密封パッキン挿着蓋は、蓋の天板とパッキンとの接触面積が更に小さくなるため、容器本体の口部に螺着するときに、パッキンが滑りやすくなり、さらに低閉栓トルクでも良好な密封性が得られる。 And the low torque and high sealing packing insertion lid of the present invention, which has been subjected to embossing on the lower surface of the packing cradle ring, further reduces the contact area between the top plate of the lid and the packing. When screwed, the packing becomes slippery, and good sealing performance can be obtained even with a low closing torque.

次に、本発明の低トルク高密封パッキン挿着蓋の一実施形態について、図を用いて詳細に説明する。 Next, an embodiment of the low torque high sealing packing insertion lid of the present invention will be described in detail with reference to the drawings.

図１（ａ）は、本実施形態の低トルク高密封パッキン挿着蓋のパッキンの構成を示し、図１（ｂ）は、そのパッキンを挿着する本実施形態の蓋を螺着した容器の断面図であり、図２（ａ）は、その容器の平面図で、図２（ｂ）は、側面図である．
本実施形態の低トルク高密封パッキン挿着蓋（２２０）は、図１（ｂ）に示すように、内側の天板（２２１）の下面にパッキン（１００）を挿着し、容器本体（２１０）の口部に螺着する蓋であって、蓋は、天板周縁部下面に周壁（２２４）上端部内周面と接続する所定幅のパッキン受台リング（２２２）を設け、このパッキン受台リングの内側の天板下面に所定高さのパッキン当接リング（２２３）を所定位置に設け、周壁内周面に容器本体の雄ねじ（２１２）と螺合する雌ねじ（２２５）を設け、周壁内周面の上方にパッキン嵌着リング（２２６）を設けるものである。そして、パッキン（１００）は、積層シートからなり、最上層が結晶化ポリエチレンテレフタレートフィルム層で、中間層に発泡シート層を有するもので、図１（ａ）に示すように、〔天板側〕結晶化ポリエチレンテレフタレ
ートフィルム層（１１０）／ポリプロピレンフィルム層（１２０）／発泡ポリエチレンシート層（１３０）／ポリプロピレンフィルム層（１４０）〔容器本体側〕構成の積層シートである。なお、容器（２００）は、例えば図１（ｂ）に示すように、広口の容器本体（２１０）に本低トルク高密封パッキン挿着蓋（２２０）が螺着するものであり、容器本体は、周壁（２１１）と底板（２１３）とからなり、周壁の上方外周面に蓋の雌ねじ（２２５）と螺合する雄ねじ（２１２）を設けるものである。 Fig.1 (a) shows the structure of the packing of the low torque high sealing packing insertion lid of this embodiment, FIG.1 (b) is the container of the container which screwed the lid of this embodiment which inserts the packing. It is sectional drawing, FIG. 2 (a) is a top view of the container, FIG.2 (b) is a side view.
As shown in FIG. 1 (b), the low-torque, high-sealing packing insertion lid (220) of the present embodiment has the packing (100) attached to the lower surface of the inner top plate (221), and the container body (210 ), And provided with a packing receiving ring (222) having a predetermined width connected to the inner peripheral surface of the peripheral wall (224) at the lower surface of the peripheral edge of the top plate. A packing contact ring (223) having a predetermined height is provided at a predetermined position on the lower surface of the top plate inside the ring, and a female screw (225) that is screwed with a male screw (212) of the container body is provided on the inner peripheral surface of the peripheral wall. A packing fitting ring (226) is provided above the peripheral surface. The packing (100) is composed of a laminated sheet, the uppermost layer is a crystallized polyethylene terephthalate film layer, and the intermediate layer has a foamed sheet layer. As shown in FIG. It is a laminated sheet having a structure of crystallized polyethylene terephthalate film layer (110) / polypropylene film layer (120) / foamed polyethylene sheet layer (130) / polypropylene film layer (140) [container main body side]. As shown in FIG. 1B, for example, the container (200) is configured such that the low-torque high-sealing packing insertion lid (220) is screwed to the wide-mouthed container body (210). The peripheral wall (211) and the bottom plate (213) are provided, and a male screw (212) that is screwed with the female screw (225) of the lid is provided on the upper outer peripheral surface of the peripheral wall.

そして、上述した結晶化ポリエチレンテレフタレートフィルム層の厚みは、１５〜３００μｍ厚が望ましく、厚みが厚い方が滑り性が良好となる。本実施形態の蓋は、容器を開閉する度にパッキンを滑らせることで、低トルク高密封を実現させており、従って、パッキンは、硬度が高く、充填時に耐熱性があり、滑りが良好な結晶化ポリエチレンテレフタレートフィルム層側を、蓋の天板側にして挿着することが望ましい。 And as for the thickness of the crystallized polyethylene terephthalate film layer mentioned above, 15-300 micrometers thickness is desirable, and the one where thickness is thick becomes favorable in sliding property. The lid of this embodiment realizes low torque and high sealing by sliding the packing every time the container is opened and closed. Therefore, the packing has high hardness, heat resistance during filling, and good sliding. It is desirable to insert the crystallized polyethylene terephthalate film layer side with the top plate side of the lid.

また、必要に応じて、容器本体の口部に螺着するときの低トルク高密封性を更に向上するために、パッキン受台リングの下面に、図３（ａ）に示すように、複数個の断面形状Ｖ字状の滑り向上リング（２２７）を中心方向へ所定間隔で設けても、また、図３（ｂ）に示すように、シボ加工（２２８）を施しても良い。 Further, if necessary, in order to further improve the low torque and high sealing performance when screwed into the mouth of the container body, a plurality of pieces are provided on the lower surface of the packing receiving ring as shown in FIG. These slip-enhancing rings (227) having a V-shaped cross section may be provided at a predetermined interval in the center direction, or may be subjected to embossing (228) as shown in FIG.

次に、結晶化ポリエチレンテレフタレートフィルム層の効果の検証（検証１）、各構成パッキンの外れ強度の検証（検証２）、Ｖ字状滑り向上リング付パッキン受台リングとシボ加工を施したパッキン受台リングの効果の検証（検証３）、そして、シボ加工を施したパッキン受台リングにおけるパッキン構成の効果の検証（検証４）について、その結果を説明する。
＜検証１＞
〔天板側〕結晶化ポリエチレンテレフタレートフィルム層（１００μｍ）／ポリプロピレンフィルム層（６０μｍ）／発泡ポリエチレンシート層（２．８倍）／ポリプロピレンフィルム層（６０μｍ）〔容器本体側〕構成（総厚１．６ｍｍ）のパッキン構成１のパッキンと〔天板側〕ポリプロピレンフィルム層（６０μｍ）／発泡ポリエチレンシート層（２．８倍）／ポリプロピレンフィルム層（６０μｍ）〔容器本体側〕構成（総厚１．５ｍｍ）のパッキン構成２のパッキンを作製して、図２（ａ）及び（ｂ）に示す外径寸法が８０ｍｍで高さが２７ｍｍの円筒状の広口容器を用いて、各種の閉栓トルクにおける液漏れ状態を−０．２ｂａｒで３０分の減圧環境下で観察し、パッキン構成の違いによる密封性を評価した。その結果を表１に示す。 Next, verification of the effect of the crystallized polyethylene terephthalate film layer (Verification 1), verification of the peeling strength of each packing (Verification 2), packing receiving ring with V-shaped slip improvement ring and packing receiver subjected to embossing The results of verification of the effect of the base ring (Verification 3) and verification of the effect of the packing configuration in the packing receiving ring subjected to the texture processing (Verification 4) will be described.
<Verification 1>
[Top plate side] Crystallized polyethylene terephthalate film layer (100 μm) / polypropylene film layer (60 μm) / foamed polyethylene sheet layer (2.8 times) / polypropylene film layer (60 μm) [container main body side] configuration (total thickness: 1. 6 mm) packing structure 1 packing and [top plate side] polypropylene film layer (60 μm) / foamed polyethylene sheet layer (2.8 times) / polypropylene film layer (60 μm) [container body side] structure (total thickness 1.5 mm) 2), and using a cylindrical wide-mouthed container having an outer diameter of 80 mm and a height of 27 mm as shown in FIGS. 2A and 2B, liquid leakage at various closing torques is produced. The state was observed at −0.2 bar in a reduced pressure environment for 30 minutes, and the sealing performance due to the difference in packing configuration was evaluated. The results are shown in Table 1.

パッキン構成による密封性評価の結果は、表１に示すように、天板側に結晶化ポリエチレンテレフタレートフィルム層もつパッキン構成１のパッキンは、閉栓トルクが５０±５Ｎ−ｃｍでも液漏れがなかったが、結晶化ポリエチレンテレフタレートフィルム層のないパッキン構成２のパッキンは、閉栓トルクが１５０±５Ｎ−ｃｍ以上ないと液漏れを生じることが分かった。
＜検証２＞
検証１に示すパッキン構成１のパッキンとパッキン構成２のパッキンを作製して、それぞれのパッキンを、検証１に示す円筒状の広口容器の蓋の内側の天板下にそれぞれ挿着し、これらのパッキンを、φ４０ｍｍの吸盤を用い３０ｍｍ／ｍｉｎで吸引して、パッキンの蓋からの離脱強度を測定し、パッキン構成による蓋からの離脱強度の相違を調べた。その結果を表２に示す。

As shown in Table 1, the results of the sealing evaluation by the packing configuration showed that the packing of the packing configuration 1 having the crystallized polyethylene terephthalate film layer on the top plate side did not leak even when the closing torque was 50 ± 5 N-cm. It was found that the packing with packing structure 2 without the crystallized polyethylene terephthalate film layer causes liquid leakage unless the closing torque is 150 ± 5 N-cm or more.
<Verification 2>
The packing of the packing configuration 1 shown in the verification 1 and the packing of the packing configuration 2 are prepared, and the respective packings are respectively inserted under the top plate inside the lid of the cylindrical wide-mouth container shown in the verification 1, The packing was sucked at 30 mm / min using a φ40 mm suction cup, the separation strength of the packing from the lid was measured, and the difference in the separation strength from the lid due to the packing configuration was examined. The results are shown in Table 2.

パッキン構成による蓋からの離脱強度の相違は、表２に示すように、天板側に結晶化ポリエチレンテレフタレートフィルム層もつパッキン構成１のパッキンは、蓋からの離脱強
度が６０〜７５Ｎと強かったが、結晶化ポリエチレンテレフタレートフィルム層のないパッキン構成２のパッキンは、２５〜３５Ｎと弱かった。このことから、天板側に結晶化ポリエチレンテレフタレートフィルム層もつパッキン構成１のパッキンは、蓋への貼り付けが不要であることが分かった。
＜検証３＞
パッキン受台リングの下面が、通常平面のもの、複数個のＶ字状滑り向上リングを設けたもの、シボ加工（＃１００）を施したものの３種類の蓋を作製し、これらの蓋に〔天板側〕ポリプロピレンフィルム層（６０μｍ）／発泡ポリエチレンシート層（２．８倍）／ポリプロピレンフィルム層（６０μｍ）〔容器本体側〕構成（総厚１．５ｍｍ）のパッキン構成２のパッキンを挿着して、各種の閉栓トルクにおける液漏れ状態を−０．２ｂａｒで３０分の減圧環境下で観察し、パッキン受台リングの表面状態による密封性の相違を調べた。その結果を表３に示す。

As shown in Table 2, the difference in the separation strength from the lid due to the packing configuration was as follows. The packing with the packing configuration 1 having the crystallized polyethylene terephthalate film layer on the top plate side had a strong separation strength from the lid of 60 to 75 N. The packing of packing configuration 2 without a crystallized polyethylene terephthalate film layer was as weak as 25 to 35 N. From this, it was found that the packing of the packing configuration 1 having the crystallized polyethylene terephthalate film layer on the top plate side does not need to be attached to the lid.
<Verification 3>
Three types of lids are produced: the bottom surface of the packing cradle ring is normally flat, the one provided with a plurality of V-shaped slip improvement rings, and the one subjected to embossing (# 100). Top plate side] Polypropylene film layer (60 μm) / foamed polyethylene sheet layer (2.8 times) / polypropylene film layer (60 μm) [container body side] packing (total thickness 1.5 mm) packing of structure 2 is inserted Then, the liquid leakage state at various closing torques was observed in a reduced pressure environment at −0.2 bar for 30 minutes, and the difference in sealing performance depending on the surface state of the packing cradle ring was examined. The results are shown in Table 3.

パッキン受台リングの表面状態による密封性の相違は、表３に示すように、通常平面のものは、閉栓トルクが１５０±５Ｎ−ｃｍでも液漏れを生じ、複数個のＶ字状滑り向上リングを設けたものは、閉栓トルクが１５０±５Ｎ−ｃｍで液漏れがなく、シボ加工を施したものは、閉栓トルクが１００±５Ｎ−ｃｍで液漏れを生じることがなかった。このことから、パッキン受台リングの表面に、複数個のＶ字状滑り向上リング又はシボ加工を施こすことにより密封性が向上することが分かった。また、シボ加工の方が効果が大きかった。
＜検証４＞
検証１で、天板側に結晶化ポリエチレンテレフタレートフィルム層もつパッキン構成１のパッキンが、低開栓トルクで密封性が良好であり、検証３で、パッキン受台リング下面にシボ加工を施したものが、低開栓トルクで密封性が良好なことが分かった。このため、パッキン構成１のパッキンとシボ加工を施したパッキン受台リングとの最適な組合せで、低閉栓トルクにおける液漏れ状態を−０．２ｂａｒで３０分の減圧環境下で観察して、その密封性を評価した。比較のために、パッキン構成２のパッキンについても、合わせて密封性を評価した。その結果を表４に示す。

As shown in Table 3, the difference in sealing performance depending on the surface state of the packing cradle ring is that a normal flat surface causes liquid leakage even when the closing torque is 150 ± 5 N-cm, and a plurality of V-shaped slip improvement rings. In the case where the plugging torque was 150 ± 5 N-cm, there was no liquid leakage, and in the case where the embossing was applied, the liquid leakage did not occur when the plugging torque was 100 ± 5 N-cm. From this, it was found that the sealing performance is improved by applying a plurality of V-shaped slip improvement rings or embossing to the surface of the packing receiving ring. In addition, the texture processing was more effective.
<Verification 4>
In the verification 1, the packing of the packing configuration 1 having the crystallized polyethylene terephthalate film layer on the top plate side has a good sealing performance with a low opening torque, and in the verification 3, the bottom surface of the packing cradle ring has been subjected to the embossing process. However, it was found that the sealing performance was good with a low opening torque. For this reason, by observing the liquid leakage state at a low closing torque at -0.2 bar in a reduced pressure environment for 30 minutes with the optimum combination of the packing of packing structure 1 and the packing receiving ring subjected to the texture processing, Sealability was evaluated. For comparison, the sealing performance of the packing of packing configuration 2 was also evaluated. The results are shown in Table 4.

シボ加工したパッキン受台におけるパッキン構成による密封性の相違は、結晶化ポリエチレンテレフタレートフィルム層もつパッキン構成１のパッキンは、５０±５Ｎ−ｃｍの低閉栓トルクで液漏れがなかった．一方、パッキン構成２のパッキンでは、５０±５Ｎ−ｃｍの低閉栓トルクでは、液漏れが見られた．

The difference in sealing performance due to the packing structure in the textured packing cradle was that the packing of packing structure 1 having a crystallized polyethylene terephthalate film layer had a low closing torque of 50 ± 5 N-cm and no liquid leakage. On the other hand, in the packing of packing configuration 2, liquid leakage was seen at a low closing torque of 50 ± 5 N-cm.

（ａ）は、本発明の一実施形態の低トルク高密封パッキン挿着蓋のパッキンの構成を示す説明図であり、（ｂ）は、そのパッキンを装着する本発明の一実施形態の蓋を螺着する容器の断面図である。(A) is explanatory drawing which shows the structure of the packing of the low torque high sealing packing insertion cover of one Embodiment of this invention, (b) is the cover of one Embodiment of this invention which mounts the packing. It is sectional drawing of the container to screw. （ａ）は、本発明の一実施形態の低トルク高密封パッキン挿着蓋を装着する容器の平面図であり、（ｂ）は、その側面図である．(A) is a top view of the container which mounts | wears with the low torque high sealing packing insertion cover of one Embodiment of this invention, (b) is the side view. （ａ）は、パッキン受台リングの下面に、複数個の断面形状Ｖ字状の滑り向上リングを設けた蓋の部分断面図であり、（ｂ）は、パッキン受台リングの下面に、シボ加工を施した蓋の部分断面図である。(A) is a partial cross-sectional view of a lid provided with a plurality of V-shaped slip improvement rings on the lower surface of the packing cradle ring, and (b) is a texture on the lower surface of the packing cradle ring. It is a fragmentary sectional view of the lid which processed.

符号の説明Explanation of symbols

１００……パッキン
１１０……結晶化ポリエチレンテレフタレートフィルム層
１２０，１４０……ポリプロピレンフィルム層
１３０……発泡ポリエチレンシート層又は発泡シート層
２００……容器
２１０……容器本体
２１１，２２４……周壁
２１２……雄ねじ
２１３……底板
２２０……蓋
２２１……天板
２２２……パッキン受台リング
２２３……パッキン当接リング
２２５……雌ねじ
２２６……パッキン嵌着リング
２２７……断面形状Ｖ字状の滑り向上リング
２２８……シボ加工 100 ... packing 110 ... crystallized polyethylene terephthalate film layer 120, 140 ... polypropylene film layer 130 ... foamed polyethylene sheet layer or foamed sheet layer 200 ... container 210 ... container body 211, 224 ... peripheral wall 212 ... Male screw 213 ... Bottom plate 220 ... Lid 221 ... Top plate 222 ... Packing receiving ring 223 ... Packing contact ring 225 ... Female screw 226 ... Packing fitting ring 227 ... Ring 228 …… Texture processing

Claims

内側の天板の下面にパッキンを挿着し容器本体の口部に螺着する蓋において、前記パッキンが、積層シートからなり、最上層が結晶化ポリエチレンテレフタレートフィルム層で、中間層に発泡シート層を有することを特徴とする低トルク高密封パッキン挿着蓋。 In the lid that is inserted into the lower surface of the inner top plate and screwed into the mouth of the container body, the packing is made of a laminated sheet, the uppermost layer is a crystallized polyethylene terephthalate film layer, and the intermediate layer is a foamed sheet layer A low-torque, high-sealing packing insertion lid characterized by comprising:

内側の天板の下面にパッキンを挿着し容器本体の口部に螺着する蓋において、前記蓋の天板周縁部下面に周壁上端部内周面と接続する所定幅のパッキン受台リングを設けたことを特徴とする請求項１記載の低トルク高密封パッキン挿着蓋。 A lid that inserts packing into the lower surface of the inner top plate and is screwed into the mouth of the container body is provided with a packing cradle ring of a predetermined width that is connected to the inner peripheral surface of the upper end of the peripheral wall on the lower surface of the peripheral edge of the top plate. The low-torque, high-sealing packing insertion lid according to claim 1.

内側の天板の下面にパッキンを挿着し容器本体の口部に螺着する蓋において、前記蓋の天板周縁部下面に周壁上端部内周面と接続する所定幅のパッキン受台リングを設け、かつ前記パッキン受台リングの内側の天板下面に所定高さのパッキン当接リングを設けたことを特徴とする請求項１記載の低トルク高密封パッキン挿着蓋。 A lid that inserts packing into the lower surface of the inner top plate and is screwed into the mouth of the container body is provided with a packing cradle ring of a predetermined width that is connected to the inner peripheral surface of the upper end of the peripheral wall on the lower surface of the peripheral edge of the top plate. 2. A low-torque, high-sealing packing insertion lid according to claim 1, wherein a packing contact ring having a predetermined height is provided on the lower surface of the top plate inside the packing receiving ring.

前記パッキン受台リングの下面に、複数個の断面形状Ｖ字状の滑り向上リングを中心方向へ所定間隔で設けたことを特徴とする請求項２乃至３記載の低トルク高密封パッキン挿着蓋。 4. A low-torque, high-sealing packing insertion cover according to claim 2, wherein a plurality of V-shaped slip improvement rings are provided at predetermined intervals in the center direction on the lower surface of the packing receiving ring. .

前記パッキン受台リングの下面に、シボ加工を施したことを特徴とする請求項２乃至３記載の低トルク高密封パッキン挿着蓋。 4. A low-torque, high-sealing packing insertion lid according to claim 2, wherein the bottom surface of the packing receiving ring is subjected to a texture.