JPH0227220B2 - JIDOHANBAIKYOINRYOYOKI - Google Patents
JIDOHANBAIKYOINRYOYOKIInfo
- Publication number
- JPH0227220B2 JPH0227220B2 JP2696284A JP2696284A JPH0227220B2 JP H0227220 B2 JPH0227220 B2 JP H0227220B2 JP 2696284 A JP2696284 A JP 2696284A JP 2696284 A JP2696284 A JP 2696284A JP H0227220 B2 JPH0227220 B2 JP H0227220B2
- Authority
- JP
- Japan
- Prior art keywords
- container
- opening
- present
- weight
- beverage container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 235000013361 beverage Nutrition 0.000 claims description 34
- 239000011256 inorganic filler Substances 0.000 claims description 14
- 229910003475 inorganic filler Inorganic materials 0.000 claims description 14
- 229920005672 polyolefin resin Polymers 0.000 claims description 11
- 239000011342 resin composition Substances 0.000 claims description 11
- 238000000465 moulding Methods 0.000 description 14
- 239000000454 talc Substances 0.000 description 8
- 229910052623 talc Inorganic materials 0.000 description 8
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229920013716 polyethylene resin Polymers 0.000 description 6
- -1 polypropylene Polymers 0.000 description 6
- 229920005989 resin Polymers 0.000 description 6
- 239000011347 resin Substances 0.000 description 6
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 229920001903 high density polyethylene Polymers 0.000 description 5
- 239000004700 high-density polyethylene Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004898 kneading Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920001684 low density polyethylene Polymers 0.000 description 3
- 239000004702 low-density polyethylene Substances 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000004711 α-olefin Substances 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000003811 curling process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 229920001179 medium density polyethylene Polymers 0.000 description 1
- 239000004701 medium-density polyethylene Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 229920001384 propylene homopolymer Polymers 0.000 description 1
- 229920005604 random copolymer Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
Description
［産業上の利用分野］
本発明は自動販売機用飲料容器に関し、詳しく
は積み重ね貯蔵安定性に優れ、倒れにくく、かつ
容器の１個ずつの切れと落下性が良好である自動
販売機用飲料容器に関する。
［従来の技術および発明が解決しようとする課
題］
従来、自動販売機用容器としては紙製、合成樹
脂製あるいは紙と合成樹脂からなる積層物製のも
のが知られている。紙製容器は軽量で焼却性に優
れたものであるが、耐水性に劣り、また製造上接
着工程を要するため、生産性が低い。このため、
紙と合成樹脂からなる積層物を用いて耐水性の改
良が行なわれているが、製造工程は同一であり生
産性が低く、また切断面があるため、耐水性が不
十分であり、本質的解決はなされていない。さら
に、紙製容器あるいは紙と合成樹脂からなる積層
物製容器はその軽量性と共に接着部を有する不均
一性のために、自動販売機用容器として用いた場
合、落下不良を生じてトラブル発生は避けられな
い。しかも、該容器に印刷をする場合、印刷が接
着部でずれるという欠点を有している。
そこで、本発明者らは先にポリオレフイン系樹
脂と無機充填剤（タルク）からなる樹脂組成物シ
ートを熱成形して得られるフランジ付容器をカー
リング処理した自動販売機用カツプを提案してい
る（特開昭60−77852号）。
このものは耐水性、生産性、外観、印刷性、強
度、廃棄処理性、自動落下特性などに優れたもの
である。
しかしながら、自動販売機用の容器としては通
常容器における要求性状に加えて、さらにスタツ
ク特性、落下特性などが要求されている。特に容
器を多数積み重ねた状態で貯蔵する場合の安定
性、倒れの程度、使用に際しての容器のきれや落
下性などの特性の長期安定性が要求されている。
先に提案した自動販売機用飲料カツプは、カツ
プに継ぎ目がなく、比較的密度が大であるという
意味における自動落下特性は良好であるものの、
形状についての検討は特になされていない。した
がつて容器のきれを含む落下特性の長期安定性と
いう見地からは未だ不充分なものであり、しかも
容器を多数積み重ねた状態で貯蔵する場合の安定
性、倒れの程度などのスタツク特性については充
分検討されていなかつた。
［課題を解決するための手段］
そこで、本発明者らは上記自動販売機用カツプ
における優れた特性を保ちつつ、さらにスタツク
特性、落下特性などの良好な自動販売機用飲料容
器を開発すべく研究を重ねた結果、無機充填剤含
有ポリオレフイン系樹脂からなる特定の形状を有
する容器がこれらの特性を満足することを見い出
し、かかる知見に基いて本発明を完成した。
すなわち本発明はポリオレフイン系樹脂30〜80
重量％および無機充填剤70〜20重量％を配合した
樹脂組成物で形成された開口周縁部がカーリング
処理された自動販売機用飲料容器であつて、容器
底部から中間部までは角度α3〜８度の第１拡開
部を構成し、容器中間部から開口までは半径R50
〜300mmの弧状の第２拡開部を構成し、かつ容器
開口における第１拡開部の延長線と第２拡開部終
端との拡差βを0.3〜２mmとしたことを特徴とす
る自動販売機用飲料容器である。
本発明に用いるポリオレフイン系樹脂としては
特に制限はなく、たとえばポリプロピレン系樹
脂、ポリエチレン系樹脂などをあげることができ
る。
ここでポリプロピレン系樹脂としては、プロピ
レンのホモポリマーやプロピレンと30重量％以下
のエチレンなど他のα−オレフインとのブロツク
コポリマーやランダムコポリマーなど、さらには
これらの混合物などがある。また、メルトインデ
ツクス（MI）としては0.1ｇ／10分以上、好まし
くは0.2ｇ／10分以上のものが用いられる。MIが
0.1ｇ／10分未満のものにあつては溶融粘度が高
く、無機充填剤との均一混練性が十分でなく、ま
た容器の成形性も悪く好ましくない。
本発明の自動販売機用飲料容器が真空もしくは
圧空などの差圧成形によつて製造されるために
は、溶融強度の点からはMIが５ｇ／10分以下の
ものの使用が好ましい。また、ポリプロピレン系
樹脂の選択は、無機充填剤の配合量、飲料容器の
大きさ等によつて要求される耐熱性、剛性、耐寒
性などを考慮して適宜行なうことができる。
また、ポリエチレン系樹脂としても特に制限は
なく、高密度ポリエチレン、中密度ポリエチレ
ン、低密度ポリエチレンがあり、エチレンのホモ
ポリマーの他、エチレンと30重量％以下のプロピ
レンなど他のα−オレフインとのランダムあるい
はブロツクコポリマーがある。ここで高密度ポリ
エチレンとしては密度0.940〜0.970ｇ／cm2、中・
低密度ポリエチレンとしては高圧法ポリエチレン
や中・低圧法で得られるエチレンとプロピレン、
ブテン−１，４−メチルペンテン−１、オクテン
−１など炭素数３〜12のα−オレフインとのコポ
リマー、いわゆる直鎖状低密度ポリエチレンがあ
る。ここでMIは0.02〜10.0ｇ／10分、好ましくは
0.03〜5.0ｇ／10分のものが好ましく用いられる。
しかしながら、ポリエチレン系樹脂のみで用いる
場合には、密度0.930ｇ／cm3以上の中・高密度ポ
リエチレンの使用が好ましく、特にドローダウン
の少ない分子量分布の幅が広い樹脂が好適に使用
される。
本発明にあつては、ポリオレフイン系樹脂を単
独で用いることも可能であるが、前記したポリプ
ロピレン系樹脂とポリエチレン系樹脂との配合組
成物を用いることが効果的である。このとき、ポ
リエチレン系樹脂として高密度ポリエチレンと低
密度ポリエチレンを併用するとより効果的であ
る。この場合、ポリプロピレン系樹脂20〜90重量
％とポリエチレン系樹脂80〜10重量％を配合する
ことが特に好ましい。
いずれにしても、ポリオレフイン系樹脂は後に
のべる無機充填剤の配合量、販売に供される飲料
の種類や温度、容器の大きさ、深さ、形状、その
成形方法などによつて最適なものを選択すればよ
く、この際において種々のポリマー、グレードは
もちろん、異なるポリオレフイン系樹脂の二種以
上を組合せて配合しても何らさしつかえない。
次に、本発明における無機充填剤としては種々
のものが使用できる。例えばタルク、クレー、炭
酸カルシウム、硫酸カルシウム、炭酸マグネシウ
ム、硫酸バリウム、酸化チタン、シリカあるいは
これらの混合物などを用いることができる。特に
タルク単独またはタルクと酸化チタンの混合物が
好適である。
本発明の容器は上記ポリオレフイン系樹脂およ
び無機充填剤を配合した樹脂組成物より形成され
るものである。ここで両者の配合割合は、ポリオ
レフイン系樹脂30〜80重量％、好ましくは35〜70
重量％および無機充填剤70〜20重量％、好ましく
は65〜30重量％である。無機充填剤の配合割合が
70重量％を超えると、成形性が悪化し、また20重
量％未満であると、剛性や廃棄処理性などに劣る
ため好ましくない。また、タルクと酸化チタンを
併用する場合の酸化チタンの配合量は樹脂組成物
に対して１〜10重量％、好ましくは２〜７重量％
の範囲である。
本発明の自動販売機用飲料容器は原則的には上
記の如きポリオレフイン系樹脂と無機充填剤から
なる樹脂組成物を原料とするが、必要により自動
販売機用飲料容器の物性等に影響のない程度にエ
チレン−プロピレンゴムなどのゴム類、不飽和カ
ルボン酸またはその誘導体によつて変性されたポ
リオレフイン、各種充填剤、各種の酸化防止剤、
帯電防止剤、滑剤、着色剤などを加えることもで
きる。
本発明に用いる樹脂組成物は上記成分を通常の
混練法、すなわちロール、バンバリーミキサー、
一軸押出機などで十分混練することにより得られ
る。
本発明の自動販売機用飲料容器は、上記の樹脂
組成物をシートとし、差圧成形などにより成形し
たのち、容器の開口周縁部をカーリング処理する
ことによつて得られる。たとえば前記樹脂組成物
をペレツト化した後、Ｔ−ダイ式などの押出成形
機あるいはカレンダーロールなどでシート化す
る。シートの厚さは通常0.5〜1.5mmとすればよ
い。
次に、得られたシートを差圧成形などにより成
形する。ここで差圧成形とは圧力差を利用する成
形方法を広く指称し、具体的には熱成形、例えば
真空成形、圧空成形などや固相圧空成形等が挙げ
られる。この成形法によれば一度に多数個取りが
でき、成形サイクルも短かく、連続的に多量生産
が可能である。また、継ぎ目やシワ、偏肉のない
容器を容易に得ることができる。ここで差圧成形
はシート成形に引続き、再加熱することなく連続
成形することもできる。ここにおいて、第１拡開
部と第２拡開部の角度、形状は差圧成形金型の形
状を変更することにより本発明における容器形状
のものを任意に得ることができる。
次に、容器の開口周縁部をカーリング処理する
ことにより最終製品が得られる。なお、カールの
形状は特に制限はなく、第３図のように傾斜部
を有するもの、同のように下部にフラツト部を
有するもの等があり、後者が特に好ましい。
本発明の飲料容器は形状において次のような特
徴を有しているものである。これらの特徴を第１
図および第２図により説明する。
すなわち本発明の飲料容器の形状における最大
の特徴は、容器の底部から中間部までを直線状の
第１拡開部とし、容器中間部から開口までを弧状
の第２拡開部としたことである。ここで、第１拡
開部における拡開の角度、すなわち第２図におけ
るαは３〜８度、好ましくは４〜８度の範囲でな
ければならない。角度αが３度未満となると、飲
料容器をスタツク高さａとして規則正しく積み重
ねることができず、また８度を超えると、多数個
（たとえば100個）積み重ねた場合、横方向への倒
れが大きくなり、自動販売機用飲料容器として使
用できない。
さらに、第２拡開部の弧状の拡開は半径Ｒが50
〜300mm、好ましくは100〜250mmの弧状に拡開し
ており、かつ容器開口における第１拡開部の延長
線と第２拡開部終端との拡差βは0.3〜２mm、好
ましくは0.5〜1.5mmでなければならない。ここで
半径Ｒが50mm未満であると、カーリング処理時に
おける加熱の影響などによりスタツク性、落下性
の安定、確実性が低下し、また300mmを超えると、
積み重ね時の倒れが大きくなり、好ましくない。
なお、半径Ｒの弧状は必ずしも第１拡開部の延長
線と線接触しなくてもよい。さらに、拡差βが
0.3mm未満であると、自然落下せず、一方２mmを
超えると、積み重ね時の倒れが大きくなり、好ま
しくない。
本発明の容器において、第２拡開部の起点から
開口までの距離、すなわち第２拡開部高さｈは特
に制限はないが、容器全高Ｈの1/5〜3/5、好まし
くは1/5〜1/2とすべきである。
本発明の容器は上記の如き二段に拡開した形状
のため、落下性、積み重ね性などが良好で積み重
ね時に倒れにくいという性質を有している。
さらに本発明の飲料容器は、開口周縁部がカー
リング処理されている。これは容器の開口部の強
度を向上させ、使用時に手や唇を傷つけないなど
飲料用容器としての特性を高めるためである。カ
ーリング処理がなされたものであれば特に制限は
ないが、強度向上、容器の切れ、落下性などのた
めには、カール形状は第３図の如く傾斜してい
るものよりも第３図に示したように、下部にフ
ラツト部を有するものの方が好適である。
以上のように、本発明の自動販売機用飲料容器
は、上述の樹脂組成物を原料とし、上記の形状特
性を有するものであればよいが、さらに望ましく
はスタツク形成のために、容器底部周壁にアンダ
ーカツトを設けてもよい。この場合、アンダーカ
ツトの高さａは３〜10mm程度が好ましい。また、
通常底部に形成される隆起幅ｂは成形可能な範囲
で小さいものが好適であり、通常は１〜５mm、好
ましくは２mm以下とする。
［発明の効果］
本発明の飲料容器は特定の形状を有しているた
め、積み重ね貯蔵安定性が良好であり、倒れにく
いものであり、いわゆるスタツク特性に優れたも
のである。
しかもこのため、本発明の飲料容器は容器の１
個ずつの切れが良く、落下特性に優れたものであ
る。
この点を詳述すると、本発明の飲料容器は第１
拡開部における拡開の角度αを３〜８度としてい
るため、飲料容器を規則正しく積み重ねることが
でき、貯蔵安定性に優れており、しかも多数個積
み重ねたときの横方向への倒れが小さい。
また、本発明の飲料容器は第２拡開部を設け、
この第２拡開部の半径Ｒを50〜300mmとしている
ため、カーリング処理時における加熱の影響など
によりスタツク性、落下性の安定、確実性を低下
させることがないと同時に、積み重ね時の倒れも
小さくすることができる。
さらに本発明の飲料容器は、容器開口における
第１拡開部の延長線と第２拡開部終端との拡差β
を0.3〜２mmとしているため、自然落下に何ら支
障がなく、しかも積み重ね時の倒れを小さくする
ことができる。
本発明の飲料容器は形状において上記した特色
を有しているため、最終的にスタツク特性に優
れ、しかも落下特性に優れたものとなつている。
また、本発明の飲料容器は特定の組成の樹脂組
成物を用いたものであるため、耐水性、耐熱性、
強度、剛性に優れており、廃棄処理性も良好であ
る。さらに無機充填剤としてタルクまたはタルク
と酸化チタンとの混合物を用いることにより、白
色高級紙様外観、肌ざわりを有するものとするこ
とができる。
このように、本発明の自動販売機用飲料容器は
各種ホツト用あるいはコールド用の自動販売機に
おいて有効に使用することができる。
［実施例］
次に、実施例により本発明を詳しく説明する。
実施例１〜５および比較例１〜２
ポリプロピレンホモポリマー（密度0.91ｇ／
cm3、メルトインデツクス（MI）0.6ｇ／10分）25
重量％、高密度ポリエチレン（密度0.91ｇ／cm3、
MI0.4ｇ／10分）25重量％、平均粒径15μのタル
ク46重量％および酸化チタン４重量％をバンバリ
ーミキサーを用いて混練、ペレツト化した後、押
出成形機を用いて厚み１mmのシートを得た。次い
で、圧空成形機を用いて圧力６Kg／cm2、成形温度
160℃で高さH90mm、平均径60mm、側壁平均厚み
0.45mmで、第２拡開部の拡開半径Ｒ＝200mm、開
口における第１拡開部の延長線と第２拡開部終端
との拡差β＝１mm、第２拡開部の起点から開口ま
での距離ｈを25mmおよび第１拡開部の角度αを所
定値として飲料容器を成形した。
得られた容器の開口リブ部を三本ロール型カー
リング装置を用いてカーリング処理を行ない、第
３図に示した形状のカールを有する自動販売機
用飲料容器を得た。
得られた容器を100個積み重ねた場合の先端部
最大倒れ度合を測定した。結果を第１表に示す。
また、この容器を市販のジユース自動販売機を
用いて自動落下テストを行なつたところ、本発明
による容器（実施例１〜５で得られた容器）は何
らトラブルなく落下することが確認された。一
方、比較例１の容器は先端部最大倒れ度合が70mm
より小さいため、容器が１個ずつ落ちてこなかつ
た。また、比較例２の容器は先端部最大倒れ度合
が500mmを超えているため、自動販売機内での移
動がスムースに行かなかつた。
[Industrial Field of Application] The present invention relates to a beverage container for vending machines, and more specifically, a beverage container for vending machines that has excellent stacking storage stability, is resistant to falling over, and has good tearability and dropability of each container. Regarding containers. [Prior Art and Problems to be Solved by the Invention] Conventionally, containers for vending machines are known to be made of paper, synthetic resin, or a laminate made of paper and synthetic resin. Although paper containers are lightweight and have excellent incineration properties, they have poor water resistance and require an adhesive process to manufacture, resulting in low productivity. For this reason,
Water resistance has been improved by using a laminate made of paper and synthetic resin, but the manufacturing process is the same and productivity is low, and because there is a cut surface, water resistance is insufficient and essentially No resolution has been made. Furthermore, because paper containers or laminate containers made of paper and synthetic resin are lightweight and have non-uniform adhesive parts, when used as containers for vending machines, they do not fall easily and cause problems. Inevitable. Moreover, when printing on the container, there is a drawback that the printing is misaligned at the adhesive part. Therefore, the present inventors have previously proposed a vending machine cup in which a flanged container obtained by thermoforming a resin composition sheet made of a polyolefin resin and an inorganic filler (talc) is curled ( (Japanese Patent Publication No. 1983-77852). This material is excellent in water resistance, productivity, appearance, printability, strength, disposal properties, automatic dropping characteristics, etc. However, containers for vending machines are required to have stacking properties, falling properties, etc. in addition to the properties required for normal containers. In particular, long-term stability is required in properties such as stability when storing a large number of containers in a stacked state, the degree of toppling, and the ability of containers to break and fall during use. Although the previously proposed beverage cup for vending machines has good automatic fall characteristics in the sense that the cup has no seams and is relatively dense,
No particular consideration was given to the shape. Therefore, it is still unsatisfactory from the viewpoint of long-term stability of falling properties, including container breakage, and moreover, it is still insufficient in terms of stability when storing a large number of containers in a stacked state, and stacking properties such as the degree of falling. It had not been sufficiently considered. [Means for Solving the Problems] Therefore, the inventors of the present invention aimed to develop a beverage container for vending machines that maintains the excellent characteristics of the above-mentioned vending machine cups and also has good stacking characteristics and falling characteristics. As a result of repeated research, it was discovered that a container having a specific shape made of an inorganic filler-containing polyolefin resin satisfies these characteristics, and the present invention was completed based on this knowledge. That is, the present invention uses polyolefin resins of 30 to 80
A beverage container for a vending machine, which is formed of a resin composition containing 70 to 20 weight % of an inorganic filler and whose opening periphery is curled, and the angle from the bottom of the container to the middle part is α3 to 8. The radius from the middle part of the container to the opening is R50.
An automatic machine comprising an arc-shaped second widening section of ~300 mm, and a difference β between the extension line of the first widening section at the container opening and the end of the second widening section is 0.3 to 2 mm. This is a beverage container for vending machines. The polyolefin resin used in the present invention is not particularly limited, and examples include polypropylene resins and polyethylene resins. Examples of the polypropylene resin include propylene homopolymers, block copolymers and random copolymers of propylene and 30% by weight or less of other α-olefins such as ethylene, and mixtures thereof. Further, the melt index (MI) used is 0.1 g/10 minutes or more, preferably 0.2 g/10 minutes or more. M.I.
If it is less than 0.1 g/10 minutes, the melt viscosity is high, the uniform kneading ability with the inorganic filler is insufficient, and the moldability of the container is also poor, which is not preferable. In order to manufacture the beverage container for vending machines of the present invention by differential pressure molding such as vacuum or compressed air, it is preferable to use a container with an MI of 5 g/10 minutes or less from the viewpoint of melt strength. Further, the polypropylene resin can be selected as appropriate, taking into consideration the heat resistance, rigidity, cold resistance, etc. required depending on the amount of inorganic filler blended, the size of the beverage container, etc. In addition, there are no particular restrictions on polyethylene resins, and there are high-density polyethylene, medium-density polyethylene, and low-density polyethylene.In addition to ethylene homopolymers, random combinations of ethylene and other α-olefins such as propylene of up to 30% by weight Alternatively, there are block copolymers. Here, high-density polyethylene has a density of 0.940 to 0.970 g/cm 2 , medium-
Low-density polyethylene includes high-pressure polyethylene, ethylene and propylene obtained by medium- and low-pressure methods,
There are copolymers with α-olefins having 3 to 12 carbon atoms, such as butene-1,4-methylpentene-1 and octene-1, so-called linear low-density polyethylene. Here MI is 0.02-10.0g/10min, preferably
0.03 to 5.0 g/10 minutes is preferably used.
However, when only polyethylene resin is used, it is preferable to use medium- to high-density polyethylene with a density of 0.930 g/cm 3 or more, and in particular, a resin with a wide molecular weight distribution with little drawdown is preferably used. In the present invention, although it is possible to use a polyolefin resin alone, it is effective to use a blended composition of the above-mentioned polypropylene resin and polyethylene resin. At this time, it is more effective to use a combination of high density polyethylene and low density polyethylene as the polyethylene resin. In this case, it is particularly preferable to blend 20 to 90% by weight of the polypropylene resin and 80 to 10% by weight of the polyethylene resin. In any case, the optimal polyolefin resin is selected based on the amount of inorganic filler added later, the type and temperature of the beverage to be sold, the size, depth, and shape of the container, and the method of molding it. The material may be selected as desired, and in this case, not only various polymers and grades, but also combinations of two or more different polyolefin resins may be used. Next, various kinds of inorganic fillers can be used as the inorganic filler in the present invention. For example, talc, clay, calcium carbonate, calcium sulfate, magnesium carbonate, barium sulfate, titanium oxide, silica, or a mixture thereof can be used. Particularly suitable is talc alone or a mixture of talc and titanium oxide. The container of the present invention is formed from a resin composition containing the above polyolefin resin and an inorganic filler. Here, the blending ratio of both is 30 to 80% by weight of the polyolefin resin, preferably 35 to 70% by weight.
% by weight and inorganic filler 70-20% by weight, preferably 65-30% by weight. The blending ratio of inorganic filler is
If it exceeds 70% by weight, moldability will deteriorate, and if it is less than 20% by weight, it will be undesirable because rigidity and disposal properties will be poor. In addition, when talc and titanium oxide are used together, the amount of titanium oxide is 1 to 10% by weight, preferably 2 to 7% by weight based on the resin composition.
is within the range of In principle, the beverage container for vending machines of the present invention is made from a resin composition consisting of the polyolefin resin and inorganic filler as described above, but if necessary, it may be necessary to do so without affecting the physical properties of the beverage container for vending machines. Rubbers such as ethylene-propylene rubber, polyolefins modified with unsaturated carboxylic acids or derivatives thereof, various fillers, various antioxidants,
Antistatic agents, lubricants, colorants, etc. can also be added. The resin composition used in the present invention can be prepared by kneading the above components using a conventional kneading method, that is, using a roll, a Banbury mixer,
It can be obtained by thorough kneading using a single screw extruder or the like. The beverage container for a vending machine of the present invention is obtained by molding the resin composition into a sheet by differential pressure molding or the like, and then subjecting the opening periphery of the container to a curling treatment. For example, after the resin composition is pelletized, it is formed into a sheet using an extruder such as a T-die type or a calender roll. The thickness of the sheet may normally be 0.5 to 1.5 mm. Next, the obtained sheet is molded by differential pressure molding or the like. Here, differential pressure molding broadly refers to a molding method that utilizes a pressure difference, and specifically includes thermoforming, such as vacuum forming, pressure forming, solid state pressure forming, and the like. According to this molding method, many pieces can be molded at once, the molding cycle is short, and continuous mass production is possible. Moreover, a container without seams, wrinkles, or uneven thickness can be easily obtained. Here, differential pressure molding can also be performed continuously after sheet molding without reheating. Here, the angle and shape of the first expanded portion and the second expanded portion can be arbitrarily obtained in the shape of a container according to the present invention by changing the shape of the differential pressure molding die. Next, the final product is obtained by curling the opening periphery of the container. Note that the shape of the curl is not particularly limited, and may have a sloped portion as shown in FIG. 3 or a flat portion at the bottom, the latter being particularly preferred. The beverage container of the present invention has the following features in terms of shape. These characteristics are the first
This will be explained with reference to the drawings and FIG. In other words, the biggest feature of the shape of the beverage container of the present invention is that the first expanding portion is linear from the bottom to the middle of the container, and the second expanding portion is arc-shaped from the middle of the container to the opening. be. Here, the angle of expansion in the first expansion part, ie, α in FIG. 2, must be in the range of 3 to 8 degrees, preferably 4 to 8 degrees. If the angle α is less than 3 degrees, the beverage containers cannot be stacked regularly at the stack height a, and if it exceeds 8 degrees, when a large number of containers (for example, 100 containers) are stacked, they will fall over in the lateral direction. , cannot be used as beverage containers for vending machines. Furthermore, the arc-shaped expansion of the second expansion part has a radius R of 50
It expands in an arc of ~300 mm, preferably 100 to 250 mm, and the difference β between the extension line of the first expanded part and the end of the second expanded part at the container opening is 0.3 to 2 mm, preferably 0.5 to Must be 1.5mm. If the radius R is less than 50 mm, the stability and reliability of stacking and falling properties will decrease due to the effects of heating during the curling process, and if it exceeds 300 mm,
This is undesirable as it causes a large amount of collapse when stacked.
Note that the arc shape with radius R does not necessarily have to be in line contact with the extension line of the first expanded portion. Furthermore, the expansion β is
If it is less than 0.3 mm, it will not fall naturally, while if it exceeds 2 mm, it will fall down more when stacked, which is not preferable. In the container of the present invention, the distance from the starting point of the second expanded portion to the opening, that is, the height h of the second expanded portion, is not particularly limited, but is 1/5 to 3/5 of the total height H of the container, preferably 1/5 to 3/5 of the total height H of the container. It should be between /5 and 1/2. Since the container of the present invention has the above-mentioned two-stage expanded shape, it has good dropability and stackability, and has the property that it does not easily fall over when stacked. Further, in the beverage container of the present invention, the peripheral edge of the opening is curled. This is to improve the strength of the opening of the container and improve its characteristics as a beverage container, such as preventing injury to hands and lips during use. There are no particular restrictions as long as the product has been curled, but in order to improve strength, break the container, and prevent it from falling, the curled shape shown in Figure 3 is preferable to the slanted shape shown in Figure 3. As mentioned above, it is preferable to have a flat portion at the bottom. As described above, the beverage container for vending machines of the present invention may be made from the above-mentioned resin composition as a raw material and have the above-mentioned shape characteristics. An undercut may be provided. In this case, the height a of the undercut is preferably about 3 to 10 mm. Also,
Usually, the width b of the ridge formed on the bottom is preferably as small as possible within the moldable range, and is usually 1 to 5 mm, preferably 2 mm or less. [Effects of the Invention] Since the beverage container of the present invention has a specific shape, it has good stacking storage stability, is resistant to falling over, and has excellent so-called stacking properties. Moreover, for this reason, the beverage container of the present invention has only one part of the container.
It has good individual cuts and excellent drop characteristics. To explain this point in detail, the beverage container of the present invention
Since the expansion angle α in the expansion part is 3 to 8 degrees, the beverage containers can be stacked regularly, have excellent storage stability, and are less likely to fall laterally when a large number of containers are stacked. Moreover, the beverage container of the present invention is provided with a second expanded portion,
Since the radius R of this second expanded portion is set to 50 to 300 mm, the stability and reliability of stacking properties and falling properties will not deteriorate due to the influence of heating during the curling process, and at the same time, it will not fall over when stacking. Can be made smaller. Furthermore, the beverage container of the present invention has an expansion difference β between the extension line of the first expanded portion and the end of the second expanded portion at the container opening.
Since it is set to 0.3 to 2 mm, there is no problem with natural falling, and moreover, it is possible to reduce the fall when stacking. Since the beverage container of the present invention has the above-described characteristics in shape, it ultimately has excellent stacking characteristics and also excellent falling characteristics. In addition, since the beverage container of the present invention uses a resin composition with a specific composition, it has water resistance, heat resistance,
It has excellent strength and rigidity, and is also easy to dispose of. Furthermore, by using talc or a mixture of talc and titanium oxide as an inorganic filler, it can have an appearance and feel similar to white high-grade paper. As described above, the beverage container for vending machines of the present invention can be effectively used in various hot or cold vending machines. [Example] Next, the present invention will be explained in detail with reference to Examples. Examples 1 to 5 and Comparative Examples 1 to 2 Polypropylene homopolymer (density 0.91 g/
cm3 , melt index (MI) 0.6g/10min) 25
Weight%, high density polyethylene (density 0.91 g/cm 3 ,
MI0.4g/10min) 25% by weight, 46% by weight of talc with an average particle size of 15μ, and 4% by weight of titanium oxide were kneaded and pelletized using a Banbury mixer, and then made into a 1mm thick sheet using an extrusion molding machine. Obtained. Next, using a pressure molding machine, the pressure was 6Kg/cm 2 and the molding temperature was
Height H90mm, average diameter 60mm, average side wall thickness at 160℃
0.45mm, expansion radius R of the second expansion part = 200mm, expansion difference β between the extension line of the first expansion part at the opening and the end of the second expansion part = 1mm, from the starting point of the second expansion part A beverage container was molded with the distance h to the opening set to 25 mm and the angle α of the first expanded portion set to a predetermined value. The opening rib portion of the obtained container was curled using a three-roll curling device to obtain a beverage container for a vending machine having a curl in the shape shown in FIG. The maximum degree of collapse of the tip when 100 of the obtained containers were stacked was measured. The results are shown in Table 1. Furthermore, when this container was subjected to an automatic drop test using a commercially available J-Use vending machine, it was confirmed that the containers according to the present invention (containers obtained in Examples 1 to 5) were dropped without any trouble. . On the other hand, the container of Comparative Example 1 had a maximum tilting degree of 70 mm at the tip.
Because it was smaller, the containers did not fall one by one. Furthermore, since the container of Comparative Example 2 had a maximum degree of inclination of the tip exceeding 500 mm, it could not be moved smoothly within the vending machine.
【表】【table】
第１図は本発明の自動販売機用飲料容器の１例
の一部切り欠き正面図、第２図は本発明の自動販
売機用飲料容器の１例の部分断面図、第３図お
よびはカール形状の種類を示す。
Ａ……容器第一拡開部、Ｂ……容器第二拡開
部、Ｄ……平均径、Ｈ……高さ、ｈ……第二拡開
部高さ、ｔ……平均厚み、ａ……アンダーカツト
高さ、ｂ……底部に形成される隆起幅、α……第
１拡開部角度、Ｒ……第２拡開部の拡開半径、ｏ
……中心点、β……拡差。
FIG. 1 is a partially cutaway front view of an example of a beverage container for a vending machine according to the present invention, FIG. 2 is a partial sectional view of an example of a beverage container for a vending machine according to the present invention, and FIG. Indicates the type of curl shape. A: First expanded portion of the container, B: Second expanded portion of the container, D: Average diameter, H: Height, h: Height of the second expanded portion, t: Average thickness, a ... Undercut height, b ... Protuberance width formed on the bottom, α ... First expanded part angle, R ... Expanded radius of second expanded part, o
...Center point, β...Differential difference.
Claims (1)
機充填剤70〜20重量％を配合した樹脂組成物で形
成された開口周縁部がカーリング処理された自動
販売機用飲料容器であつて、容器底部から中間部
までは角度α3〜８度の第１拡開部を構成し、容
器中間部から開口までは半径R50〜300mmの弧状
の第２拡開部を構成し、かつ容器開口における第
１拡開部の延長線と第２拡開部終端との拡差βを
0.3〜２mmとしたことを特徴とする自動販売機用
飲料容器。 ２ 第２拡開部の起点から開口までの長さｈが容
器の全高Ｈの1/5〜3/5である特許請求の範囲第１
項記載の容器。 ３ 開口周縁部のカール形状が下部にフラツト部
を有するものである特許請求の範囲第１項記載の
容器。[Scope of Claims] 1. A beverage container for a vending machine, which is formed of a resin composition containing 30 to 80% by weight of a polyolefin resin and 70 to 20% by weight of an inorganic filler, and whose opening periphery is curled. From the bottom of the container to the middle part constitutes a first widened part with an angle of α3 to 8 degrees, and from the middle part of the container to the opening constitutes a second widened part with a radius of R50 to 300 mm, and from the middle part of the container to the opening of the container The expansion difference β between the extension line of the first expansion part and the end of the second expansion part in
A beverage container for a vending machine characterized by having a diameter of 0.3 to 2 mm. 2. Claim 1, wherein the length h from the starting point of the second expanded portion to the opening is 1/5 to 3/5 of the total height H of the container.
Containers listed in section. 3. The container according to claim 1, wherein the curled shape of the opening periphery has a flat portion at the bottom.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2696284A JPH0227220B2 (en) | 1984-02-17 | 1984-02-17 | JIDOHANBAIKYOINRYOYOKI |
| US06/620,185 US4578296A (en) | 1983-06-28 | 1984-06-13 | Thermoformed polyolefin cup |
| CA000456697A CA1255424A (en) | 1983-06-28 | 1984-06-15 | Drinking cup formed from polyolefin sheet |
| EP84107220A EP0129890B1 (en) | 1983-06-28 | 1984-06-23 | Cup and three-layer structure sheet suitable for producing a cup. |
| DE19843486322 DE3486322T2 (en) | 1983-06-28 | 1984-06-23 | Cup and three-layer film for their production. |
| KR1019840003694A KR900001670B1 (en) | 1983-06-28 | 1984-06-28 | Thermo formed polyolefin cup |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2696284A JPH0227220B2 (en) | 1984-02-17 | 1984-02-17 | JIDOHANBAIKYOINRYOYOKI |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60172640A JPS60172640A (en) | 1985-09-06 |
| JPH0227220B2 true JPH0227220B2 (en) | 1990-06-15 |
Family
ID=12207778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2696284A Expired - Lifetime JPH0227220B2 (en) | 1983-06-28 | 1984-02-17 | JIDOHANBAIKYOINRYOYOKI |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0227220B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6960316B2 (en) * | 2002-10-30 | 2005-11-01 | Sorensen Research And Development Trust | Injection-molded plastic container or closure with turned-under rim and method of injection-molding same |
| JP4567703B2 (en) * | 2007-03-26 | 2010-10-20 | 株式会社サンプラスト三笠 | container |
-
1984
- 1984-02-17 JP JP2696284A patent/JPH0227220B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60172640A (en) | 1985-09-06 |
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