JPH0398843A - Recycling type self standing container with weighted bottom for gas containing beverage - Google Patents
Recycling type self standing container with weighted bottom for gas containing beverageInfo
- Publication number
- JPH0398843A JPH0398843A JP1221812A JP22181289A JPH0398843A JP H0398843 A JPH0398843 A JP H0398843A JP 1221812 A JP1221812 A JP 1221812A JP 22181289 A JP22181289 A JP 22181289A JP H0398843 A JPH0398843 A JP H0398843A
- Authority
- JP
- Japan
- Prior art keywords
- container
- printed
- gas
- weighted
- polyester resin
- 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.)
- Pending
Links
- 235000013361 beverage Nutrition 0.000 title claims description 23
- 238000004064 recycling Methods 0.000 title abstract 2
- 229920001225 polyester resin Polymers 0.000 claims abstract description 19
- 239000004645 polyester resin Substances 0.000 claims abstract description 19
- 238000000071 blow moulding Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 238000002795 fluorescence method Methods 0.000 claims description 2
- -1 polyethylene terephthalate Polymers 0.000 claims description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 2
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims 1
- 230000008602 contraction Effects 0.000 abstract description 13
- 238000007639 printing Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 11
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 230000009192 sprinting Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 235000014171 carbonated beverage Nutrition 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229920000219 Ethylene vinyl alcohol Polymers 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001506 fluorescence spectroscopy Methods 0.000 description 1
- 238000009998 heat setting Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000013112 stability test Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
- B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
- B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、ポリエステル樹脂を用いて延伸ブロー戒形し
た再使用型ガス含有飲料用底部加重自立容器に関する．
［従来の技術］
従来、ガス含有飲料用容器として使用されている容器は
、金属容器を除くと、ガラス製の容器と延伸ブロー成形
したポリエステル樹脂製の容器に大別される．延伸ブロ
ー成形したポリエステル樹脂製の容器は、透明性、耐衝
撃性、耐圧性、容器重量の軽減化、適度な剛性、等の点
で優れており、広く使用されている．
両者の流通形態を較べると、ガラス製の容器は回収され
再使用されているが、ポリエステル樹脂製の容器は１回
使用しただけで捨てられるいわゆる使い捨てが普通であ
る．
しかしながら省資源、製造コスト、廃棄物の処理等の多
くの面からポリエステル樹脂製の容器の回収、再使用の
必要性が要求されている．［本発明が解決すべき課Ｍ］
前述のように、ポリエステル樹脂製のガス含有飲料用容
器が回収され再使用されないのは幾つかの原因があるが
一番重大な問題は、容器の膨朕、収縮によりもたらされ
る．即ち、ポリエステル樹脂製のガス含有飲料用容器が
回収され再使用される場合、まず、回収された容器は６
５〜７０℃、３〜４％のアルカリ水溶液で洗浄される．
この洗浄工程でポリエステル樹脂製容器は収縮する．次
に、ガス含有飲料が充填されるが、容器の内圧は、常温
でもほぼ４ｋｇ／ａｌとなるため容器は膨らみ、容器は
膨脹する．回収、再使用の際かならずこのＢ朕、収縮を
受るわけである．通常回収、再使用を行う為にはコスト
的にみても５回以上好ましくは１０回〜２５回繰り返す
必要があるが、このような膨脹、収縮を受けると、容器
に施した、印刷表示が破損してしまうのである．改めて
印刷を行うのであれば回収、再使用を行う利点はなく、
むしろ新しい容器をその都度使用するほうがアルカリ洗
浄などを行う必要もなく、回収費を考えるまでもなくコ
スト的にみても有利である．本発明は、この様な容器の
膨腰、収縮による、印刷表示の破損という従来解決でき
なかった問題を解決して、回収再使用できるポリエステ
ル樹脂製のガス含有飲料用底部加重自立容器を提供した
ものである．
［課題を解決した手段］
本発明は、
「 １． 加熱温度９０〜１２０℃熱固定温度７０〜１
５０℃で延伸ブロー成形した、ポリエステル樹脂底部加
重自立容器であって、胴部外周に周面より内方に陥没し
た印刷凹所を配設し、印刷凹所部分の延仲面内配向度
１＋ｍ）を０．１〜０．５とし、この印刷凹所に表示パ
ターンを印刷してなる、再使用型ガス含有飲料用底部加
重自立容器．
２． 容器の肉厚が胴部０．４〜１。００１１１、底部
１．０〜５６０圓である請求項１に記載された、再使用
型ガス含有飲料用底部加重自立容器．３． 再使用時の
アルカリ洗浄時の収縮と、ガス含有飲料充填時の容器の
膨脹の差が、縦方向２．７％以内であり、径方向１．９
％以内である、請求項１または２に記載された、再使用
型ガス含有飲料用底部加重自立容器．
４． 容器壁が複数の壁材で構成された多層楕遣である
、請求項１ないし３のいずれか１項に記載された、再使
用型ガス含有飲料用底部加重自立容器．
５．ポリエステル樹脂がポリエチレンテレフタレートで
ある、請求項１ないし４のいずれか１項に記載された、
再使用型ガス含有飲料用底部加重自立容器．
６， 印刷凹所部分の延伸面内配向度（ｌ＋ｍ）を０．
１〜０．５が、偏光螢光法で測定した値である、請求項
エないし５のいずれかｌ項に記載された、再使用型ガス
含有飲料用底部加重自立容器．ｊに関する．
通常、ポリエステル容器にはポリウレタン系の二液反応
型スクリーンプロセスインキを用いて、スクリーン印刷
法で印刷を施したり、ＵＶ硬化型インキを用いて印刷を
施すが、容器体に施した印刷表示は繰り返し生ずる容器
の膨脹、収縮に追従することが出来ず破損する．本発明
者等は種々研究の結果、延伸ブロー戒形した容器の膨脹
、収縮を小さくしなければ容器の印刷表示の破損は防止
できないとの結論に達し、そのためには、延伸ブロー成
形における、延伸温度を低くする、つまり、プリフォー
ムの加熱温度を低くし、延伸倍率を小さくし、一方熱固
定は、金型温度を高くして十分に行うことが必要である
ことを解明して本発明を完成した．
そして再使用における印刷表示の破損を防ぐ為に容器の
膨脹、収縮の最大巾を縦方向２．６５％以内、経方向１
．９％以内にすると印刷表示の破損を防止に有効である
ことが実験的に明らかになつた．
ここで膨脹、収縮率は、それぞれ、《膨脹時の長さーも
との長さ／もとの長さ）ＸＩＯＯ、及び、（もとの長さ
一収縮の長さ／もとの長さ）×１００、で与えられる，
さらに、容器の膨脹、収縮は容器の分子配向と大きな関
係があり、膨脹、収縮率を上記範囲に押さえるためには
、容器の印刷を施す部分の延伸面内配向度は０．１〜０
．５でなければならないことを見出だした．０．１以下
の場合膨張が大きく、収縮と膨脹の差が径方向において
１．９％以上になり印刷剥がれをおこす．また０．５を
こえると収縮が大きく径方向において２．６５％以上に
もなり、印刷剥がれをおこす，
また、回収、再使用するためには、容器の肉厚を大きく
して強度を増強すると共に、容器の胴部外周に周面より
内方に陥没した印刷凹所を配設しこの印刷凹所に表示パ
ターンを印刷することにより、輸送などの流通過程にお
ける印刷表示の摩擦、衝突などによる機械的破損を防ぐ
必要がある．この、印刷凹所を配設することは後で具体
的に説明するが、印刷表示の摩擦破損防止に予想以上の
効果がある．繰り返すが、この部分の延仲配向度は、前
述のように０．１〜０．５でなければならない．容器に
ベースカップなどを配設することは使い捨ての場合は問
題ないが、回収、再使用する場合は取扱上不都合が多い
ので特に底部の肉厚を大きくして底部加重型とし、自立
性を持たせる必要がある．底部加重型のボトルは、移送
工程でのガイドやボトル同志のぶつかり合いに対しての
動揺が少ないため印刷面に傷がつきにくいという利点を
有する． 本発明の容器に充填するガス含有飲料として
は、種々のガスを含有したものが充填できるが炭酸ガス
を含有した飲料が最も好適である．また容器の器壁を複
数の壁材を使用して多層構造とすることにより単層の容
器では奏せない効果を奏させることができる．
例えばエチレンービニルアルコール共重合体等の酸素遮
断層を配置すれば酸素の影響を防ぐことができる．その
ほかポリアリレートやポリカーボネート等の耐熱性材料
を配置すれば、熱水での洗浄時の収縮がより小さくなり
、印刷の破損が少なくなる．
ポリエステル樹脂の分子配向を現す尺度として密度が一
般的に使われているが、密度は分子配向の程度のみなら
ず、他の要因によっても変化するため、本発明の場合、
分子配向を示す尺度としては適さない．
これに対して、偏光螢光法では、分子配内高分子に吸着
された螢光性分子の光学的異方性を利用して高分子の分
子配向を定量的に測定するものであり、前述した熱固定
の影響を受けずに分子配向の程度を求めることができる
のである．この偏光螢光法による容器壁内に置ける二次
元配向度はつぎの式で表される．
ｌ Ｉノ （ ω） ＝Ｋ φ （Ａｃｏｓ’
ω ＋ｍｓｉｎ’÷３Ｘｎ／８冫
［式中、ｌ ＩＩ （ω）はポリエステル樹脂から発す
る、螢光の偏光成分強度を表し、またＩＩは入射偏光の
振動方向と測光偏光方向が平行であることを示し、ωは
上記偏光の振動方向にたいする、試料の回転角を示す．
Ｋは試料分子軸と励起螢光の振動方向が平行である時の
最大励起確率、φは分子螢光収率を示す．ぶは最終戒型
容器壁面内任意の一方向へ分子が配向している割合、ｍ
はぶと直角方向に分子が配向している割合、ｎは面内無
配向の割合を示し、ｆ＋ｍ＋ｎ＝１である．］で定量的
に現すことができる．
こうしてωを変化させ（０゜、４５’、９０°）このω
にたいする偏光成分強度ｆ ＩＩ （ω）を測定し、得
られた３つの連立方程式の解として、ぶ、ｍ，ｎの値を
求めることができる．
［実施例］
次に本発明を実施例に就いて具体的に説明する．第１図
は本発明の実施例を示す再使用型ガス含有飲料用容器の
正面断面図である。容器１の胴部外周に周面より内方に
陥没した印刷凹所４が配設されているがこの部分は、０
．５〜１．０ｍ程度外周、周面より内方に陥没している
．またこの例では、この部分のポリエステル樹脂壁の延
伸面内配向度は０．１〜０．５である．胴部２は０．５
〜０。８ｆｌの膜厚である４１た底部３は１．５〜４．
０ｍの厚膜であって、底部加重となっており、自立性を
有する容器であることが理解できる．第２図は従来の使
い捨てポリエステル容器を示す．Ｐ部２は平らであって
本発明の印刷凹所は形成されていない．また、器壁は胴
部２も底部３も均一の厚みであって底部加重型になって
いないのでガス含有飲料を充填したときはともかく、洗
浄工程時は空であるため、自立性が乏しく、自立搬送が
不安定であり、容器が倒れ易く工程トラブルの原因とな
る．また、ベースカップ５を使用しなければならないた
めに洗浄が困難である．次に本発明容器の製造方法と、
従来の使い捨て容器の製造方法を示し、次いで両者の比
較試験の結果を表１に示す．
製造例１
射出戒形機にて、ポリエステル樹脂（ＰＥＴＩＶ＝０．
８４９）を使用して重量１００ｇの有底プリフォームを
戒形する．このプリフォームを東洋食品機械株式会社製
のＯＢＭ−ＩＧ型二軸延伸ブロー成形機を使用して１０
５℃に予備加熱した後、キャビテイ内面が１２０℃に加
熱された内容積が約１ ５ ５ ０ ｍｌのブロー用金
型内で二軸延仲ブローすると同時に約２０秒間ヒートセ
ットした後取り出すことによって第１図に示す容器を製
造してた．
製造例２
射出戒形機にて、ポリエステル樹脂（ＰＥＴＩＶ＝０．
７５）を使用して重量５０ｇの有底プリフォームを成形
する．このプリフォームを東洋食品機械株式会社製のＯ
ＢＭ−ＩＧ型二軸延伸ブロー成形機を使用してキャビテ
イ表面温度を約２０℃に調節した、内容積が約１ ５
４ ０ （ＩＩＩのブロー用金型内で二軸延仲ブローを
約１０秒間行い第２図に示す容器を製遺してた．
実施例と従来例の容器の性能を比較したデータを表１に
示す．
表 １
（以下余白）
［注］
熱安定性テストは、炭酸ガス含有飲料を充填後３８℃で
１週間保存後の寸法変化で表した．印刷剥がれテストは
、３．５％、６５℃のアルカリ水溶液で１５分洗浄した
後炭酸ガス含有飲料を充填し２０時間放置後アルカリ水
溶液洗浄と炭酸ガス含有飲料充填を繰返し、印刷部分の
表面積の１０％がはがれ、または亀裂の状態になったサ
イクル数で示した．
［効果コ
このように本発明は繰返再使用出来る優れた効果を示す
．DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reusable bottom-weighted self-supporting container for gas-containing beverages made of polyester resin and stretch-blown. [Prior Art] Containers conventionally used for gas-containing beverages, excluding metal containers, are broadly classified into containers made of glass and containers made of stretch-blow-molded polyester resin. Containers made of stretch-blow molded polyester resin are widely used because of their excellent transparency, impact resistance, pressure resistance, reduced container weight, and appropriate rigidity. Comparing the distribution forms of the two, glass containers are collected and reused, while polyester resin containers are generally disposable, meaning they can be thrown away after just one use. However, there is a need to collect and reuse polyester resin containers from many aspects such as resource conservation, manufacturing costs, and waste disposal. [Problem M to be solved by the present invention] As mentioned above, there are several reasons why gas-containing beverage containers made of polyester resin are not collected and reused, but the most serious problem is the expansion of the container. , caused by contraction. That is, when gas-containing beverage containers made of polyester resin are collected and reused, first, the collected containers are
Washed with 3-4% alkaline aqueous solution at 5-70°C.
During this cleaning process, the polyester resin container shrinks. Next, the gas-containing beverage is filled, but the container expands because the internal pressure of the container is approximately 4 kg/al even at room temperature. When collecting and reusing materials, this material B is always subject to shrinkage. Normally, in order to collect and reuse it, it is necessary to repeat it 5 times or more, preferably 10 to 25 times, from a cost standpoint, but such expansion and contraction can damage the printed label on the container. That's what happens. If you print again, there is no advantage to collecting and reusing it.
In fact, it is more advantageous from a cost perspective to use a new container each time, since there is no need for alkaline cleaning, and there is no need to consider collection costs. The present invention solves the previously unsolvable problem of damage to the printed display due to expansion and contraction of the container, and provides a self-supporting bottom-weighted container for gas-containing beverages made of polyester resin that can be recovered and reused. It is something. [Means for Solving the Problems] The present invention has the following features: 1. Heating temperature: 90 to 120 degrees Celsius;
It is a self-supporting polyester resin bottom-loaded container made by stretch blow molding at 50°C, and has a printed recess that is depressed inward from the circumferential surface on the outer periphery of the body, and the degree of orientation in the plane of the stretched portion of the printed recess is
1+m) is 0.1 to 0.5, and a display pattern is printed on the printed recess. 2. 2. The reusable bottom-weighted self-supporting container for gas-containing beverages according to claim 1, wherein the wall thickness of the container is 0.4 to 1.00111 mm at the body and 1.0 to 560 mm at the bottom. 3. The difference between the shrinkage during alkaline cleaning during reuse and the expansion of the container during filling with gas-containing beverages is within 2.7% in the vertical direction and 1.9% in the radial direction.
% or less. 4. 4. A reusable bottom-weighted self-supporting container for gas-containing beverages according to any one of claims 1 to 3, wherein the container wall is a multi-layered elliptical structure composed of a plurality of wall materials. 5. As described in any one of claims 1 to 4, wherein the polyester resin is polyethylene terephthalate.
Reusable bottom-weighted self-supporting container for gas-containing beverages. 6. The degree of orientation in the stretching plane (l+m) of the printed concave portion is set to 0.
The reusable bottom-weighted self-supporting container for gas-containing beverages according to claim 5, wherein the value is 1 to 0.5 as measured by polarized fluorescence. Regarding j. Usually, polyester containers are printed using a screen printing method using a polyurethane-based two-component reactive screen process ink, or printed using a UV curable ink, but the printed display on the container body is repeated. It is not possible to follow the expansion and contraction of the container that occurs, resulting in damage. As a result of various studies, the present inventors have come to the conclusion that damage to the printed label on the container cannot be prevented unless the expansion and contraction of the stretch-blow molded container is reduced. We discovered that it is necessary to lower the temperature, that is, lower the heating temperature of the preform and lower the stretching ratio, and on the other hand, heat setting must be carried out sufficiently by increasing the mold temperature, and developed the present invention. completed. In order to prevent damage to the printed label during reuse, the maximum width of expansion and contraction of the container should be within 2.65% in the longitudinal direction and 1% in the longitudinal direction.
．． It has been experimentally found that keeping it within 9% is effective in preventing damage to printed displays. Here, the expansion and contraction rates are respectively 《expanded length - original length / original length) XIOO and (original length - deflated length / original length) ) × 100, Furthermore, the expansion and contraction of the container has a large relationship with the molecular orientation of the container, and in order to keep the expansion and contraction rate within the above range, the in-plane orientation of the printed portion of the container must be adjusted. degree is 0.1~0
．． I found that it must be 5. If it is less than 0.1, the expansion will be large, and the difference between contraction and expansion will be 1.9% or more in the radial direction, causing print peeling. If the value exceeds 0.5, the shrinkage will be large, reaching 2.65% or more in the radial direction, which will cause the print to peel off.Also, in order to collect and reuse, the container should be made thicker to increase its strength. In addition, by arranging a printing recess that is sunken inward from the circumferential surface on the outer periphery of the body of the container, and printing a display pattern on this printing recess, it is possible to prevent friction and collisions of the printed display during the distribution process such as transportation. It is necessary to prevent mechanical damage. As will be explained in detail later, the provision of printing recesses is more effective than expected in preventing frictional damage to printed displays. Again, the degree of orientation in this part must be between 0.1 and 0.5 as described above. Placing a base cup etc. in a container is not a problem if it is disposable, but it is often inconvenient to handle if it is to be collected and reused, so the bottom wall thickness is particularly increased and the bottom is weighted to make it self-supporting. It is necessary to Bottom-weighted bottles have the advantage that the printed surface is less likely to be scratched because there is less vibration due to collisions between guides and bottles during the transfer process. The gas-containing beverage to be filled into the container of the present invention can be filled with beverages containing various gases, but beverages containing carbon dioxide gas are most suitable. In addition, by using multiple wall materials to create a multilayer structure for the container wall, it is possible to achieve effects that cannot be achieved with a single layer container. For example, the effects of oxygen can be prevented by placing an oxygen barrier layer such as ethylene-vinyl alcohol copolymer. In addition, if a heat-resistant material such as polyarylate or polycarbonate is used, shrinkage during washing with hot water will be smaller, and damage to the print will be reduced. Density is generally used as a measure of the molecular orientation of polyester resins, but since density varies not only depending on the degree of molecular orientation but also on other factors, in the case of the present invention,
It is not suitable as a measure of molecular orientation. On the other hand, polarized fluorescence spectroscopy uses the optical anisotropy of fluorescent molecules adsorbed to polymer molecules to quantitatively measure the molecular orientation of polymers. The degree of molecular orientation can be determined without being affected by heat fixation. The degree of two-dimensional orientation within the container wall obtained by this polarized fluorescence method is expressed by the following formula. l Iノ (ω) = K φ (Acos'
ω + m sin' ÷ 3 where ω indicates the rotation angle of the sample with respect to the vibration direction of the polarized light.
K is the maximum excitation probability when the vibration direction of the excited fluorescence is parallel to the sample molecule axis, and φ is the molecular fluorescence yield. bu is the ratio of molecules oriented in any one direction within the wall surface of the final precept type container, m
The proportion of molecules oriented in the direction perpendicular to the blade, n indicates the proportion of non-oriented molecules in the plane, and f+m+n=1. ] can be expressed quantitatively. In this way, ω is changed (0°, 45', 90°) and this ω
By measuring the polarization component intensity f II (ω) with respect to [Example] Next, the present invention will be specifically explained with reference to an example. FIG. 1 is a front sectional view of a reusable gas-containing beverage container showing an embodiment of the present invention. A printing recess 4 recessed inward from the circumferential surface is provided on the outer periphery of the body of the container 1;
．． The outer periphery has sunk inward from the circumferential surface by approximately 5 to 1.0 m. Further, in this example, the degree of orientation in the stretching plane of the polyester resin wall in this portion is 0.1 to 0.5. Body 2 is 0.5
The bottom part 3, which has a film thickness of ~0.8fl, has a thickness of 1.5~4.
It can be seen that the container has a thickness of 0 m and is weighted at the bottom, making it a self-supporting container. Figure 2 shows a conventional disposable polyester container. The P portion 2 is flat and does not have the printing recesses of the present invention formed therein. In addition, since both the body 2 and the bottom 3 have uniform thickness and are not bottom-weighted, the container is empty during the cleaning process, regardless of when it is filled with gas-containing beverages, so it has poor self-sustainability. Self-supporting conveyance is unstable, and containers tend to fall over, causing process problems. Furthermore, cleaning is difficult because the base cup 5 must be used. Next, a method for manufacturing the container of the present invention,
Table 1 shows the conventional manufacturing method for disposable containers, and then shows the results of a comparative test between the two. Production Example 1 Polyester resin (PETIV=0.
849) to form a bottomed preform weighing 100 g. This preform was molded using an OBM-IG type biaxial stretch blow molding machine manufactured by Toyo Food Machinery Co., Ltd.
After preheating to 5°C, the inner surface of the cavity was heated to 120°C and the mold was biaxially stretched and blown in a blowing mold with an internal volume of about 1550 ml, and at the same time, it was heat set for about 20 seconds and then taken out. The container shown in Figure 1 was manufactured. Production Example 2 Polyester resin (PETIV=0.
75) to mold a bottomed preform weighing 50 g. This preform was manufactured by Toyo Food Machinery Co., Ltd.
The cavity surface temperature was adjusted to about 20°C using a BM-IG type biaxial stretch blow molding machine, and the internal volume was about 15.
40 (Biaxial elongation blowing was performed for about 10 seconds in the blowing mold of III to produce the container shown in Figure 2. Table 1 shows data comparing the performance of the containers of the example and the conventional example. Table 1 (margins below) [Note] The thermal stability test was expressed as the dimensional change after filling with a carbonated beverage and storing it at 38°C for one week.The print peeling test was performed at 3.5% and 65°C. After washing with an alkaline aqueous solution for 15 minutes, filling with a carbonated beverage and leaving it for 20 hours, the process of washing with an alkaline aqueous solution and filling with a carbonated beverage was repeated, resulting in 10% of the surface area of the printed part peeling off or cracking. This is shown in numbers. [Effects] The present invention thus shows an excellent effect in that it can be reused repeatedly.
第１図は、本発明の実施例であって、本発明の容器の正
面１部断面図である．
第２図は、従来使用されている容器を示す、正面１部断
面図である．
１・・・飲料用容器
２・・・胴部
３・・・底部
４・・・印刷部FIG. 1 shows an embodiment of the present invention, and is a partially sectional front view of a container of the present invention. FIG. 2 is a front partial sectional view showing a conventionally used container. 1...Beverage container 2...Body part 3...Bottom part 4...Printing part
Claims (1)
で延伸ブロー成形した、ポリエステル樹脂底部加重自立
容器であって、胴部外周に周面より内方に陥没した印刷
凹所を配設し、印刷凹所部分の延伸面内配向度（ｌ＋ｍ
）を０．１〜０．５とし、この印刷凹所に表示パターン
を印刷してなる、再使用型ガス含有飲料用底部加重自立
容器。 ２、容器の肉厚が胴部０．４〜１．０ｍｍ、底部１．０
〜５．０ｍｍである請求項１に記載された、再使用型ガ
ス含有飲料用底部加重自立容器。 ３、再使用時のアルカリ洗浄時の収縮と、ガス含有飲料
充填時の容器の膨脹の差が、縦方向２．７％以内であり
、径方向１．９％以内である、請求項１または２に記載
された、再使用型ガス含有飲料用底部加重自立容器。 ４、容器壁が複数の壁材で構成された多層構造である、
請求項１ないし３のいずれか１項に記載された、再使用
型ガス含有飲料用底部加重自立容器。 ５、ポリエステル樹脂がポリエチレンテレフタレートで
ある、請求項１ないし４のいずれか１項に記載された、
再使用型ガス含有飲料用底部加重自立容器。 ６、印刷凹所部分の延伸面内配向度（ｌ＋ｍ）を０．１
〜０．５が、偏光螢光法で測定した値である、請求項１
ないし５のいずれか１項に記載された、再使用型ガス含
有飲料用底部加重自立容器。[Claims] 1. Heating temperature: 90-120°C Heat-fixing temperature: 70-150°C
This is a self-supporting polyester resin bottom-loaded container made by stretch blow molding, and has a printed recess that is depressed inward from the circumferential surface on the outer periphery of the body, and the degree of orientation in the stretched plane of the printed recess (l + m
) is 0.1 to 0.5, and a display pattern is printed on the printed recesses. 2. The wall thickness of the container is 0.4 to 1.0 mm at the body and 1.0 mm at the bottom.
A reusable bottom-weighted self-supporting container for gas-containing beverages according to claim 1, having a diameter of ˜5.0 mm. 3. The difference between shrinkage during alkali cleaning during reuse and expansion of the container during filling with a gas-containing beverage is within 2.7% in the vertical direction and within 1.9% in the radial direction, or 2. 4. The container wall has a multilayer structure composed of multiple wall materials,
A reusable bottom-weighted self-supporting container for gas-containing beverages as claimed in any one of claims 1 to 3. 5. As described in any one of claims 1 to 4, wherein the polyester resin is polyethylene terephthalate.
Reusable bottom-weighted free-standing container for gas-containing beverages. 6. The degree of orientation in the stretching plane (l+m) of the printed concave portion is 0.1
-0.5 is a value measured by polarized fluorescence method.
6. The reusable bottom-weighted self-supporting container for gas-containing beverages according to any one of items 5 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1221812A JPH0398843A (en) | 1989-08-30 | 1989-08-30 | Recycling type self standing container with weighted bottom for gas containing beverage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1221812A JPH0398843A (en) | 1989-08-30 | 1989-08-30 | Recycling type self standing container with weighted bottom for gas containing beverage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0398843A true JPH0398843A (en) | 1991-04-24 |
Family
ID=16772580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1221812A Pending JPH0398843A (en) | 1989-08-30 | 1989-08-30 | Recycling type self standing container with weighted bottom for gas containing beverage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0398843A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022012032A (en) * | 2020-06-30 | 2022-01-17 | 株式会社吉野工業所 | Method for recycling synthetic resin-made container |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61137A (en) * | 1984-05-31 | 1986-01-06 | 株式会社クラレ | Orienting blow multilayer bottle and manufacture thereof |
| JPS6211710B2 (en) * | 1981-03-13 | 1987-03-13 | Toyota Jidosha Kk | |
| JPS6342A (en) * | 1986-05-30 | 1988-01-05 | コンチネンタル ペット テクノロジーズ，インコーポレーテッド | Refillable polyester vessel and preform for forming said vessel |
| JPS6346310B2 (en) * | 1982-03-11 | 1988-09-14 | Kishikawa Tokushu Barubu Seisakusho Kk |
-
1989
- 1989-08-30 JP JP1221812A patent/JPH0398843A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6211710B2 (en) * | 1981-03-13 | 1987-03-13 | Toyota Jidosha Kk | |
| JPS6346310B2 (en) * | 1982-03-11 | 1988-09-14 | Kishikawa Tokushu Barubu Seisakusho Kk | |
| JPS61137A (en) * | 1984-05-31 | 1986-01-06 | 株式会社クラレ | Orienting blow multilayer bottle and manufacture thereof |
| JPS6342A (en) * | 1986-05-30 | 1988-01-05 | コンチネンタル ペット テクノロジーズ，インコーポレーテッド | Refillable polyester vessel and preform for forming said vessel |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022012032A (en) * | 2020-06-30 | 2022-01-17 | 株式会社吉野工業所 | Method for recycling synthetic resin-made container |
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