JP2775314B2 - Threaded metal cap liner - Google Patents
Threaded metal cap linerInfo
- Publication number
- JP2775314B2 JP2775314B2 JP1270260A JP27026089A JP2775314B2 JP 2775314 B2 JP2775314 B2 JP 2775314B2 JP 1270260 A JP1270260 A JP 1270260A JP 27026089 A JP27026089 A JP 27026089A JP 2775314 B2 JP2775314 B2 JP 2775314B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- liner
- fatty acid
- component
- ethylene
- 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 - Fee Related
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- Closures For Containers (AREA)
- Sealing Material Composition (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は内容物の保存性に優れ、且つ実用時の開栓を
容易にするキャップ用ライナー、特にネジ式金属性キャ
ップ用ライナーに関する。Description: BACKGROUND OF THE INVENTION The present invention relates to a cap liner which is excellent in preservability of contents and facilitates opening at the time of practical use, and particularly to a screw type metal cap liner.
更に詳しくは、エチレン系樹脂の優れた柔軟性、食品
衛生性、成形加工性等の特徴を損うことなく、飲料、特
に清涼飲料、ビール等内圧を有する内容物の密封性、保
存性や実用時の開栓性能が著しく改善されたネジ式金属
性キャップ用ライナーに関する。More specifically, the sealability, storability, and practicality of beverages, especially soft drinks, beer, and other contents having an internal pressure, without impairing the characteristics of ethylene-based resins such as excellent flexibility, food hygiene, and moldability. TECHNICAL FIELD The present invention relates to a liner for a screw-type metallic cap, which has significantly improved opening performance at the time.
従来より瓶のキャップ用ライナーとしては、コルク、
軟質PVC、オレフィン系樹脂、特にエチレン系樹脂等が
使用されている。このうちコルク製ライナーはその反発
弾性が好まれ、古くから使用されている天然素材である
が、その品質差が大きく品質が不安定になること、およ
びコルクダストの発生や比較的高価であること等から、
近年軟質PVCやオレフィン系樹脂等のライナーにその地
位を譲りつつある。Conventionally, cork,
Flexible PVC, olefin-based resins, especially ethylene-based resins, etc. are used. Of these, cork liners are preferred for their rebound resilience and are a natural material that has been used for a long time.However, the quality difference is large and the quality is unstable, and the generation of cork dust and the relatively high cost Etc.,
In recent years, it has been giving its place to liners such as flexible PVC and olefin resin.
しかし、このうち軟質PVC製ライナーも柔軟で密封性
に優れているものの、近年、可遡剤や塩ビモノマー等衛
生上の問題から、衛生性に優れるオレフィン系樹脂に変
りつつある。However, among these, although the soft PVC liner is also flexible and excellent in sealing property, in recent years, it has been changed to an olefin resin excellent in hygiene due to hygienic problems such as a traceable agent and a vinyl chloride monomer.
そのオレフィン系樹脂製ライナーに於いても本来柔軟
な性質を備えたエチレン系樹脂が広く使用されているの
であるが瓶口の形状不良や同部のキズや欠け等に対し充
分な密封性が得られなかったり、長期の保存中に内容物
が示す内圧が低下したり、また一方では充分な密封性が
得られたもののネジ式キャップ等で開栓し難い等本来の
機能が充分に得られない等の問題点があった。Even in the case of olefin-based liners, ethylene-based resins with inherently flexible properties are widely used, but sufficient sealing performance is obtained against poor shape of bottle mouth and scratches and chips in the same part. Or the internal pressure of the contents is reduced during long-term storage.On the other hand, although sufficient sealing properties are obtained, the original functions such as difficulty in opening with a screw cap or the like cannot be obtained sufficiently. And so on.
本発明の課題は上記問題点を解決すること、即ちエチ
レン系樹脂の優れた成形加工性、食品衛生性を損なうこ
となく、エチレン系樹脂の諸性質、特に柔軟性のみでは
解決し得ない密封性、保存性および開栓性を改善したネ
ジ式金属性キャップ用ライナーを提供することにある。The object of the present invention is to solve the above-mentioned problems, that is, excellent molding processability of ethylene-based resin, without impairing food hygiene, various properties of ethylene-based resin, especially sealing properties that cannot be solved only by flexibility alone. Another object of the present invention is to provide a threaded metal cap liner with improved storage and opening properties.
本発明者らは、かかる課題を解決すべく、検討を重ね
た結果、特定のエチレン系重合体組成物からなるライナ
ーを用いることにより解決し得ることを見出し、本発明
は完成した。The present inventors have conducted various studies to solve such problems, and as a result, have found that the problems can be solved by using a liner made of a specific ethylene-based polymer composition, and the present invention has been completed.
即ち、本願発明は（Ａ）エチレン系樹脂60〜80重量％
（以下wt％と示す）と、（Ｂ）水素添加ブロック共重合
体エラストマー40〜20wt％と、（Ｃ）高級脂肪酸アミド
が（Ａ）と（Ｂ）の総量100重量部に対し0.1〜0.5重量
部とからなる組成物であって、（Ａ）成分が密度0.920
以下の低密度ポリエチレンおよびエチレンー酢酸ビニル
共重合体からなり、且つ（Ａ）成分中の酢酸ビニル含量
が３〜10wt％であり、（Ｂ）成分がスチレンを主体とす
る重合体ブロックと水素添加されたブタジエンを主体と
する重合体ブロックとからなる水添ブロック共重合体で
あり、（Ｃ）成分が炭素数16〜22の不飽和脂肪酸のアミ
ド化合物を少なくとも１つ含む炭素数８〜22の脂肪酸の
アミド化合物である組成物からなるシートを用いること
を特徴とするネジ式金属性キャップに内設されるライナ
ーを提供するものである。That is, the present invention relates to (A) 60 to 80% by weight of ethylene resin.
(Hereinafter referred to as wt%), (B) 40 to 20 wt% of a hydrogenated block copolymer elastomer, and (C) 0.1 to 0.5 wt% of higher fatty acid amide based on 100 wt% of the total amount of (A) and (B). (A) having a density of 0.920
The following low-density polyethylene and ethylene-vinyl acetate copolymer are used, and the vinyl acetate content in the component (A) is 3 to 10% by weight, and the component (B) is hydrogenated with a polymer block mainly composed of styrene. Block copolymer comprising a butadiene-based polymer block, wherein the component (C) is a fatty acid having 8 to 22 carbon atoms and containing at least one amide compound of an unsaturated fatty acid having 16 to 22 carbon atoms. The present invention provides a liner provided inside a screw-type metallic cap, characterized by using a sheet made of a composition which is an amide compound of the above.
本発明で用いる低密度ポリエチレンはJIS:K6848に規
定される密度0.920以下のものが密封性を賦与する柔軟
性の転で好ましいので用いられる。更に該ポリエチレン
およびエチレンー酢酸ビニル共重合体からなるエチレン
系樹脂（Ａ）中には酢酸ビニルが３〜10wt％、好ましく
は４〜8wt％含有されている。As the low-density polyethylene used in the present invention, those having a density of 0.920 or less specified in JIS: K6848 are used because they are preferable in terms of flexibility to impart sealing properties. Further, the ethylene resin (A) comprising the polyethylene and the ethylene-vinyl acetate copolymer contains 3 to 10% by weight, preferably 4 to 8% by weight of vinyl acetate.
該含量が10wt％を越えると内容物によってはその臭気
が嫌われまた柔軟性に富むものゝ、耐荷重性に乏しく変
形が大きくなり密封性の不足や長期の保存性の低下を発
生し易くするので好ましくない。一方、該含量が3wt％
未満では目的とする性能から得られ難い。If the content exceeds 10% by weight, the odor is disliked and the content is highly flexible, depending on the content. However, the load resistance is poor, the deformation is large, and the sealing property is insufficient and the long-term storage property is liable to occur. It is not preferable. On the other hand, the content is 3 wt%
If it is less than this, it is difficult to obtain the desired performance.
スチレン−ブタジエンブロック共重合体の水素添加物
は、スチレン含量が10〜45wt％からなり、水素添加率は
80％以上、好ましくは90％以上のもので、本重合体組成
物中、配合割合は20〜40wt％である。40wt％を越えると
ゴム弾性に富み、長期の保存性により好ましい方向では
あるが、ずり変形も大きくなりネジ式キャップの開栓が
難しくなる。一方、20wt％未満では、充分な密封性が得
られ難い。The hydrogenated product of the styrene-butadiene block copolymer has a styrene content of 10 to 45% by weight, and the hydrogenation rate is
It is 80% or more, preferably 90% or more, and the compounding ratio in the present polymer composition is 20 to 40% by weight. If it exceeds 40% by weight, the rubber elasticity is high, and this is a preferable direction because of long-term storage properties. However, shear deformation increases and opening of the screw cap becomes difficult. On the other hand, if it is less than 20% by weight, it is difficult to obtain a sufficient sealing property.
高級脂肪酸アミドは炭素数８〜22の脂肪酸アミド化合
物の単独もしくは複数からなり、且つ炭素数16〜22の不
飽和脂肪酸のアミド化合物を１つ以上含み、上記重合体
（Ａ）および（Ｂ）の混合物100重量部に対し0.1〜0.5
重量部、好ましくは0.2〜0.4重量部添加される。0.1重
量部未満では充分な滑りが得られず開栓性不足を招き易
くなり、0.5重量部を越えるとライナー表面へのブリー
ドが顕著になり内容物に混入する等の問題を起す可能性
があり好ましくない。The higher fatty acid amide comprises one or more fatty acid amide compounds having 8 to 22 carbon atoms, and contains one or more amide compounds of unsaturated fatty acids having 16 to 22 carbon atoms. 0.1 to 0.5 per 100 parts by weight of the mixture
Parts by weight, preferably 0.2 to 0.4 parts by weight. If the amount is less than 0.1 part by weight, sufficient slippage cannot be obtained and insufficient openability tends to be caused, and if it exceeds 0.5 part by weight, bleeding to the liner surface becomes remarkable and there is a possibility that a problem such as mixing with the contents may occur. Not preferred.
なお上記組成物において、一般に使用される着色剤、
安定剤、改質剤、加工性改良剤等の添加剤を本発明の重
合体組成物の特性を損なわぬ範囲で加えてもかまわな
い。In the above composition, a colorant generally used,
Additives such as stabilizers, modifiers, and processability improvers may be added as long as the properties of the polymer composition of the present invention are not impaired.
本発明のライナーに用いる重合体組成物を得るには、
（Ａ）エチレン系樹脂と（Ｂ）スチレン−ブタジエンブ
ロック共重合体水素添加物と（Ｃ）高級脂肪酸アミドを
均一に混合すればよい。To obtain the polymer composition used in the liner of the present invention,
(A) Ethylene resin, (B) hydrogenated styrene-butadiene block copolymer, and (C) higher fatty acid amide may be uniformly mixed.
混合の方法は、一般に行われているヘンシェルミキサ
ー、ドラムブレンダー等の混合機で混合し、押出機、バ
ンバリーミキサー、ロールミル等の溶融混練機を用いて
均一に混合させる方法があげられる。ライナーは一般的
には押出機、ロールミル等のシート成形装置により板状
の形状に賦形され、金属製キャップの大きさ、形状に合
せて、切断または打抜きされる。厚さはキャップの機能
に合せ選択されるが、0.5〜2mmの範囲である。As a mixing method, there is a method of mixing with a generally used mixer such as a Henschel mixer or a drum blender, and uniformly mixing using a melt kneader such as an extruder, a Banbury mixer or a roll mill. The liner is generally shaped into a plate by a sheet forming device such as an extruder or a roll mill, and cut or punched according to the size and shape of the metal cap. The thickness is selected according to the function of the cap, but is in the range of 0.5 to 2 mm.
本発明のライナーを用いることにより、エチレン系樹
脂の優れた成形加工性と食品衛生性を損うことなく、炭
酸ガス等の内圧を有する飲料の密封、保存性に優れた性
能が発揮され、かつ実用時の開栓性が容易なキャップを
提供することが可能となった。By using the liner of the present invention, without impairing the excellent processability and food hygiene of the ethylene-based resin, a sealed beverage having an internal pressure such as carbon dioxide gas, excellent performance in preservation, and is exhibited, and It has become possible to provide a cap that can be easily opened in practical use.
以下、実施例により本発明を具体的に説明する。 Hereinafter, the present invention will be described specifically with reference to examples.
実施例１〜７、比較例１〜７ 第２表に示す重合体および添加剤を用い、下記（１）
〜（３）に示す方法で第１表に示す組成物を作成し、こ
れを用いてライナーを製造してキャップに装置した。こ
のものを下記（４）に示す方法で評価した。結果は第３
表に示す。Examples 1 to 7, Comparative Examples 1 to 7 Using the polymers and additives shown in Table 2, the following (1)
The compositions shown in Table 1 were prepared by the methods shown in (1) to (3), and a liner was manufactured using the composition, and the cap was mounted on the cap. This was evaluated by the method shown in (4) below. The result is third
It is shown in the table.
（１）組成物の作製 第１表に示す各組成を予備混合し、押出機にて溶融混
練し、ペレット（３φ×3Lmm）状に押出し、作製した。(1) Preparation of Composition Each composition shown in Table 1 was premixed, melt-kneaded with an extruder, and extruded into pellets (3 φ × 3 L mm) to prepare.
なお、予備混合は室温にてドラムブレンダーで15分混
合して行った。また、溶融混練は40mmφ押出機（L/D28,
フルフライト・スクリュー）にて200℃で溶融押出して
行った。The preliminary mixing was performed by mixing at room temperature for 15 minutes using a drum blender. Melt kneading is performed using a 40mm φ extruder (L / D28,
Full-flight screw) at 200 ° C. for melt extrusion.
（２）ライナーの作製 上記組成物（ペレット）を40mmφ押出機（L/D28,フル
フライト・スクリュー）からなるシート成形装置によ
り、200℃で、厚さ0.8mmのシートを成形した。次にこれ
を33mmφの切断刃により打抜いた。(2) Production of Liner The above composition (pellet) was formed into a 0.8 mm thick sheet at 200 ° C. by a sheet forming apparatus comprising a 40 mm φ extruder (L / D28, full flight screw). Next, this was punched out with a 33 mm φ cutting blade.
（３）キャップ（33mmφ,20mmHのAl製ネジ式キャップ） 上記ライナーをキャップ内天面に200℃で１分間加熱
圧着し装着した。キャップ内面該当部には予め接着性を
賦与する酸化エチレン変性エポキシ系ホットメルト材が
塗布されたキャップを用いた。(3) Cap (33 mm φ , 20 mm H Al screw type cap) The above liner was attached to the top surface of the cap by heating and pressing at 200 ° C. for 1 minute. A cap to which an ethylene oxide-modified epoxy-based hot-melt material for imparting adhesiveness was previously applied was used for a portion corresponding to the inner surface of the cap.
（４）評価方法 （イ）保存官能テスト 清浄なガラス容器に“アサヒビール”（アサヒビール
（株）社製）を充填し、第１表に示す重合体組成物から
なるライナーを装着したAl製ネジ式キャップを用いて密
栓し、25℃で容器を倒立させた状態で保存する。保存14
日後に開栓し、パネリスト12名により同時保存した“ア
サヒビール”（低密度ポリエチレン製ライナーを使用）
との差異有無を識別試験により検定した。(4) Evaluation method (a) Preservation sensory test A clean glass container was filled with "Asahi Breweries" (manufactured by Asahi Breweries, Ltd.), and an Al product equipped with a liner composed of the polymer composition shown in Table 1 was used. Seal with a screw cap and store at 25 ° C with the container inverted. Save 14
"Asahi Breweries" (open using a low-density polyethylene liner) which was opened after a day and simultaneously stored by 12 panelists
Was tested by a discrimination test.
検定結果は「有意差あり」は×、「有意差なし」は
○、「有意差ありとは言えないが、何がしかの違いを感
ずるもの」を△で表示する。The test result is indicated by "x" for "significant difference", "o" for "no significant difference", and "△" for "not significant difference, but some difference".
（ロ）密封、保存性試験 （ａ）２のガラス瓶に100ccを残し、炭酸ガス水を満
し、第１表に示す重合体組成物よりなるライナーを装着
したキャップを用いて、トップ・ロード270kgf,サイド
・トルク8kgf−cmで密封する。炭酸ガス水は23℃で同量
の水に対し2.5倍の体積の炭酸ガスを溶存するものを用
いた。(B) Sealing and storage test (a) A top load of 270 kgf was placed in a glass bottle of 2 with 100 cc remaining, filled with carbon dioxide water, and fitted with a liner made of the polymer composition shown in Table 1. , Seal with a side torque of 8 kgf-cm. As the carbon dioxide gas water, one in which 2.5 times the volume of carbon dioxide gas was dissolved in the same amount of water at 23 ° C. was used.
（ｂ）（ａ）の状態のガラス容器試料を60℃で10分間湯
温加熱し、ガス漏れを検査する。更に40℃で７日間放置
し、ガス漏れを検査する。(B) The glass container sample in the state of (a) is heated at 60 ° C. for 10 minutes in hot water to check for gas leakage. Further, it is left at 40 ° C. for 7 days and inspected for gas leakage.
（ｃ）上記ガラス瓶は、実用上止むを得ずして生ずる瓶
口の形状不良や同部の傷や欠けを想定し、瓶口外縁に円
周方向に幅２〜3mm、半径方向に深さ１〜2mmの範囲で欠
けのあるガラス瓶を合計10本選択し、本評価に使用し
た。(C) The above glass bottle is assumed to be inferior in shape due to practically unavoidable bottle mouth shape and scratches or chipping at the same portion. A total of ten glass bottles with a chip in a range of 1 to 2 mm were selected and used for the evaluation.
（ｄ）評価の結果は次の通り表示した。(D) The results of the evaluation are shown as follows.
○：全てまたは大半が漏れない （漏れ率0/10〜1/10） ×：全てまたは大半が漏れる （漏れ率６〜10/10） △：上記両者の中間のもの （漏れ率２〜5/10） （ハ）開栓性試験 上記（ロ）（ａ）のガラス瓶試料を60℃で10分間湯温
加熱し、後室温に冷却し、５℃で1,3,7,14日保存後、そ
れぞれトルクメーターで開栓し、その時の開栓トルクを
測定する。○: All or most do not leak (leakage rate: 0/10 to 1/10) ×: All or most leak (leakage rate: 6 to 10/10) △: Intermediate between the above two (leakage rate: 2 to 5 / 10) (c) Opening test The glass bottle sample of (b) and (a) above was heated at 60 ° C for 10 minutes, then cooled to room temperature and stored at 5 ° C for 1,3,7,14 days. Each is opened with a torque meter, and the opening torque at that time is measured.
好ましいトルクは５〜20kgf−cmであり、5kgf−cm未
満では実用上、充分密封性が維持できないことがあり、
20kgf−cmを越えるトルクにおいては、その大きさに比
例して開栓が難しくなる。The preferred torque is 5 to 20 kgf-cm, and if it is less than 5 kgf-cm, practically, sufficient sealing properties may not be maintained,
At a torque exceeding 20 kgf-cm, opening becomes difficult in proportion to the magnitude of the torque.
本評価結果は次の如く表示する。 This evaluation result is displayed as follows.
○：トルク10〜16kgf−cmを示すもの ×：トルク5kgf−cm未満および20kgf−cmを越える △：トルク5kgf−cm以上10kgf−cm未満もしくは同16kgf
−cm以上20kgf−cm以下 ○: Torque of 10 to 16 kgf-cm ×: Torque of less than 5 kgf-cm and exceeding 20 kgf-cm △: Torque of 5 kgf-cm or more and less than 10 kgf-cm or 16 kgf-cm
-Cm or more and 20kgf-cm or less
───────────────────────────────────────────────────── フロントページの続き (72)発明者 林 晴夫 東京都中央区京橋３丁目７番１号 アサ ヒビール株式会社内 (72)発明者 高山 肇 千葉県市川市田尻１丁目３番１号 株式 会社柴崎製作所内 (56)参考文献 特開 昭58−183458（ＪＰ，Ａ) 特開 昭59−221251（ＪＰ，Ａ) 特開 昭58−82855（ＪＰ，Ａ) (58)調査した分野(Int.Cl.6，ＤＢ名) C09K 3/10 B65D 53/00 C08L 23/00──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Haruo Hayashi 3-7-1 Kyobashi, Chuo-ku, Tokyo Asahi Breweries, Inc. (72) Inventor Hajime Takayama 1-3-1 Tajiri, Ichikawa-shi, Chiba Pref. (56) References JP-A-58-183458 (JP, A) JP-A-59-221251 (JP, A) JP-A-58-82855 (JP, A) (58) Fields investigated (Int. Cl. 6 , DB name) C09K 3/10 B65D 53/00 C08L 23/00
Claims (1)
量％と、 （Ｃ）高級脂肪酸アミドが（Ａ）および（Ｂ）成分の総
量100重量部に対し0.1〜0.5重量部とからなる組成物で
あって、 （Ａ）成分が密度0.920以下の低密度ポリエチレンおよ
びエチレンー酢酸ビニル共重合体からなり、且つ、
（Ａ）成分中の酢酸ビニル含量が３〜10重量％であり、 （Ｂ）成分がスチレンを主体とする重合体ブロックと水
素添加されたブタジエンを主体とする重合体とからなる
水添ブロック共重合体であり、 （Ｃ）成分が炭素数16〜22の不飽和脂肪酸のアミド化合
物を少なくとも１つ含む炭素数８〜22の脂肪酸のアミド
化合物である 組成物からなるシートを用いることを特徴とするネジ式
金属性キャップに内設されるライナー。(A) 60 to 80% by weight of an ethylene resin; (B) 40 to 20% by weight of a hydrogenated block copolymer elastomer; and (C) a higher fatty acid amide comprising components (A) and (B). A composition comprising 0.1 to 0.5 parts by weight with respect to 100 parts by weight of the total of (a), wherein the component (A) comprises low-density polyethylene having a density of 0.920 or less and an ethylene-vinyl acetate copolymer, and
Component (A) has a vinyl acetate content of 3 to 10% by weight, and component (B) is a hydrogenated block composed of a polymer block mainly composed of styrene and a polymer mainly composed of hydrogenated butadiene. A sheet comprising a composition, wherein the component (C) is an amide compound of a fatty acid having 8 to 22 carbon atoms containing at least one amide compound of an unsaturated fatty acid having 16 to 22 carbon atoms. Liner installed inside the screw-type metallic cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1270260A JP2775314B2 (en) | 1989-10-19 | 1989-10-19 | Threaded metal cap liner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1270260A JP2775314B2 (en) | 1989-10-19 | 1989-10-19 | Threaded metal cap liner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03134085A JPH03134085A (en) | 1991-06-07 |
| JP2775314B2 true JP2775314B2 (en) | 1998-07-16 |
Family
ID=17483774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1270260A Expired - Fee Related JP2775314B2 (en) | 1989-10-19 | 1989-10-19 | Threaded metal cap liner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2775314B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5306542A (en) * | 1993-02-11 | 1994-04-26 | Owens-Illinois Closure Inc. | Plastic closure with compression molded sealing liner |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5882855A (en) * | 1981-11-05 | 1983-05-18 | 東洋製罐株式会社 | Vessel cover with easily unsealed liner |
| JPS58183458A (en) * | 1982-04-08 | 1983-10-26 | 日本クラウンコルク株式会社 | Vessel cover with heat-resistant liner |
| JPS59221251A (en) * | 1983-05-17 | 1984-12-12 | ナシヨナルクラウン株式会社 | Liner for cover body |
-
1989
- 1989-10-19 JP JP1270260A patent/JP2775314B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03134085A (en) | 1991-06-07 |
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