JPS6355052A - Method for preventing opacity of rolled polyester film for preventing bottle breakage - Google Patents
Method for preventing opacity of rolled polyester film for preventing bottle breakageInfo
- Publication number
- JPS6355052A JPS6355052A JP19361586A JP19361586A JPS6355052A JP S6355052 A JPS6355052 A JP S6355052A JP 19361586 A JP19361586 A JP 19361586A JP 19361586 A JP19361586 A JP 19361586A JP S6355052 A JPS6355052 A JP S6355052A
- Authority
- JP
- Japan
- Prior art keywords
- bottle
- heat
- film
- polyester film
- heat shrinkage
- 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.)
- Granted
Links
- 229920006267 polyester film Polymers 0.000 title claims description 41
- 238000000034 method Methods 0.000 title claims description 28
- 230000008602 contraction Effects 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 11
- 230000001954 sterilising effect Effects 0.000 description 9
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 7
- 238000004659 sterilization and disinfection Methods 0.000 description 7
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 4
- 235000011389 fruit/vegetable juice Nutrition 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 230000002087 whitening effect Effects 0.000 description 3
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 101100313164 Caenorhabditis elegans sea-1 gene Proteins 0.000 description 1
- 229920000298 Cellophane Polymers 0.000 description 1
- 235000011511 Diospyros Nutrition 0.000 description 1
- 244000236655 Diospyros kaki Species 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 125000005907 alkyl ester group Chemical group 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- VNGOYPQMJFJDLV-UHFFFAOYSA-N dimethyl benzene-1,3-dicarboxylate Chemical compound COC(=O)C1=CC=CC(C(=O)OC)=C1 VNGOYPQMJFJDLV-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Landscapes
- Details Of Rigid Or Semi-Rigid Containers (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〈産業上の利用分野〉
このチテ明は、波層防止用捲回ポリニスデルフィルムの
不透明化防止方法、より詳しくは、熱収縮性を有Ｊ−る
延伸ポリエステルフィルムを用いて各種の瓶を捲回包被
した後、水蒸気、熱水等で加熱殺菌処理する際に延伸ポ
リエステルフィルムが不透明化するのを防止する破瓶防
止用捲回ポリニスデルフィルムの不透明化防止方法に関
づる。[Detailed Description of the Invention] <Industrial Application Field> This article describes a method for preventing opacity of a rolled polynisdel film for preventing corrugated layers, and more specifically, a method for preventing opacity of a rolled polyester film with heat shrinkability. Opaqueization of rolled polynisdel film to prevent bottle breakage, which prevents the stretched polyester film from becoming opaque when it is heated and sterilized with steam, hot water, etc. after wrapping and wrapping various types of bottles. Regarding prevention methods.
〈従来の技術と発明が解決しようとする問題点〉従来、
飲料用瓶等、各種の瓶を保護し、外観体裁をよくするた
め、延伸ポリエステルフィルムを熱収縮させて各種層を
捲回包被したものが知られている。また、上記脂肉の内
容物を殺菌する殺菌処理工程は、上記延伸ポリエステル
フィルムで捲回包被しだ服にジュース等の内容物を充填
した後、迅速に殺菌処理するため、高温、例えば約９０
°Ｃまたはそれ以上の温度を有力る水蒸気、熱水等の加
熱手段により行なわれている。<Problems to be solved by conventional technology and invention> Conventionally,
BACKGROUND ART In order to protect various bottles such as beverage bottles and improve their appearance, it is known to heat-shrink a stretched polyester film and wrap it with various layers. In addition, in the sterilization process for sterilizing the contents of the fatty meat, after filling the clothes wrapped with the stretched polyester film with contents such as juice, the sterilization process is performed quickly at a high temperature, e.g. 90
The temperature is heated to .degree. C. or higher using effective heating means such as steam or hot water.
しかしながら、上記加熱手段により殺菌する時、延伸ポ
リエステルフィルム、特に、延伸ポリエステルフィルム
のうち瓶の軸方向の上下端部に位置する部分が水蒸気、
熱水等により白化して不透明化するという問題があった
。また、上記フィルムの不透明化が生じると、瓶の外観
体裁が悪くなるだけでなく、印刷等が施されたフィルム
を用いた場合には、色調が変化してしまい、商品１ｉｌ
ｒｉｆｉが低下するという問題があった。However, when sterilizing by the above-mentioned heating means, the stretched polyester film, especially the portions of the stretched polyester film located at the upper and lower ends in the axial direction of the bottle, is exposed to water vapor.
There was a problem that it whitened and became opaque due to hot water and the like. In addition, when the film becomes opaque, not only does the appearance of the bottle become unsatisfactory, but when a film with printing etc. is used, the color tone changes and the product 1il.
There was a problem that the rifi decreased.
く光明の目的〉
この発明は上記問題点に鑑みてなされたものであり、肋
の内容物の加熱殺菌を水蒸気、熱水等で行なう際、捲回
包被した延伸ポリエステルフィルムが不透明化すること
のない破瓶防止用捲回ポリエステルフィルムの不透明化
防止方法を提供することを目的とする。Purpose of Lighting> This invention was made in view of the above-mentioned problem, and when the contents of ribs are heat sterilized with steam, hot water, etc., the stretched polyester film wrapped around the ribs becomes opaque. An object of the present invention is to provide a method for preventing opacity of a wound polyester film for preventing bottle breakage without causing opacity.
く問題点を解決するための手段および作用〉この光明は
、延伸ポリエステルフィルムを熱収縮させて瓶に捲回包
被した後、前記層内の内容物を加熱殺菌処理する方法に
お（＼て、上記延伸ポリエステルフィルムとして、熱収
縮率が、瓶の幅方向に対して４０％以上、瓶の軸方向に
対して２０％以下のものを用い、熱収縮後の残留熱収縮
率が、瓶の幅方向に対して３５％以上、瓶の軸方向に対
して１５％以下となるように熱収縮させることににす、
上記従来の問題点を解決するものである。Means and action for solving the above problems This light is based on a method in which a stretched polyester film is heat-shrinked and wrapped around a bottle, and then the contents in the layer are heat-sterilized. As the above-mentioned stretched polyester film, a film having a heat shrinkage rate of 40% or more in the width direction of the bottle and 20% or less in the axial direction of the bottle is used, and the residual heat shrinkage rate after heat shrinkage is We decided to heat shrink it so that it shrinks by 35% or more in the width direction and 15% or less in the axial direction of the bottle.
This solves the above-mentioned conventional problems.
」二記の構成からなるこの発明によれば、延伸ポリエス
テルフィルムとして、特定の熱収縮率を有するものを用
い、かつ熱収縮後、特定の残留熱収縮率となるように熱
収縮させるので、延伸ポリエステルフィルムは、熟成１
縮後もフィルムの延伸状態が維持されてｔ？ｊす、フィ
ルム不透明化の原因となる水蒸気、熱水の影響を受けな
い。According to this invention, which has the following configuration, a stretched polyester film having a specific heat shrinkage rate is used, and after heat shrinking, it is heat-shrinked to a specific residual heat shrinkage rate. Polyester film aged 1
Is the stretched state of the film maintained even after shrinking? It is not affected by water vapor or hot water, which can cause film to become opaque.
以下に、この発明の詳細な説明する。The present invention will be explained in detail below.
この発明の方法は、まず、延伸ポリエステルフィルムを
、熱収縮さ氾て飲料用瓶等の８仲の瓶に密着させて捲回
包被する。In the method of this invention, first, a stretched polyester film is tightly wrapped around a heat-shrinkable 8-piece bottle such as a beverage bottle.
上記延伸ポリエステルフィルムを構成するポリエステル
としては、エチレングリコール、１，４−ブタンジオ−
−ル、ポリメチレングリコール等のグリコールと、テレ
フタル酸、テレフタル酸ジメチル、イソフタル酸ジメチ
ル等の多価カルボン酸またはこれらのアルキルエステル
との縮合体である６秤の造膿匹を有するポリエステルが
使用できる。これらのポリエステルのうち、加熱殺菌時
の温度等に耐え得るだけの耐熱性等を有するポリエステ
ル、特にバランスのとれた諸性性を有するエチレングリ
コールとテレフタル酸ジメチルとの縮合体であるポリエ
チレンテレフタレートが好ましい。The polyester constituting the above-mentioned stretched polyester film includes ethylene glycol, 1,4-butanedio-
A polyester having 6 scales of pyogenes, which is a condensate of a glycol such as alcohol, polymethylene glycol, and a polyhydric carboxylic acid such as terephthalic acid, dimethyl terephthalate, and dimethyl isophthalate, or an alkyl ester thereof, can be used. . Among these polyesters, polyesters that have sufficient heat resistance to withstand temperatures during heat sterilization, and particularly polyethylene terephthalate, which is a condensate of ethylene glycol and dimethyl terephthalate, which have well-balanced properties, are preferred. .
また、上記造膜性を有するポリエステルを用いて延伸ポ
リエステルフィルムを得るには、上記ポリエステルをザ
ーキュラーグイ等を用いて、プラグ方式、インフレ方式
、Ｔダイ方式等適宜の方法で、溶融押出し、延伸加工す
ればよい。この延伸加工は、常法、例えば、ピンテンタ
ー法、クリップテンター法、ロール延伸法、チューブ法
等、適宜の方法で行なうことができ、押出しと同時に、
または押出し後、所定の温度、例えば、約８０〜１３０
℃の温度に加熱しながら、−軸または二軸延伸し、急冷
することにより行なわ゛れる。In addition, in order to obtain a stretched polyester film using the polyester having the above-mentioned film-forming properties, the above-mentioned polyester can be melt-extruded and stretched by an appropriate method such as a plug method, an inflation method, a T-die method, etc. using a circular guide or the like. Just process it. This stretching process can be carried out by an appropriate method such as a conventional method such as a pin tenter method, a clip tenter method, a roll stretching method, a tube method, etc. Simultaneously with extrusion,
or after extrusion, at a predetermined temperature, e.g.
This is carried out by -axial or biaxial stretching while heating to a temperature of .degree. C., followed by rapid cooling.
上記延伸ポリニスデルフィルムの熱収縮率は、１３５°
Ｃ１１５秒間の加熱により、瓶の幅方向に対して４０％
以上、瓶の軸方向に対して２０％以下である必要がある
。上記瓶の幅方向に対する熱収縮率が４０％未満である
と、熱収縮に際して、瓶を密着包装するのが困難であり
、上記瓶の軸方向に対重る熱収縮率が２０％を越えると
、密肴包装後の外観体裁が悪くなる。The heat shrinkage rate of the stretched polynisdel film is 135°
40% in the width direction of the bottle by heating for C115 seconds
Above, it needs to be 20% or less in the axial direction of the bottle. If the heat shrinkage rate in the width direction of the bottle is less than 40%, it will be difficult to tightly package the bottle during heat shrinkage, and if the heat shrinkage rate in the axial direction of the bottle exceeds 20%. , the appearance after packaging is poor.
なお、上記の延伸ポリエステルフィルムは、未処理のも
のであってもよく、印刷適性、接着性等を改良するため
、コロナ放電等により、表面！ｉ！ＬＬ！Ｉ！されたも
のであってもよい。The above-mentioned stretched polyester film may be untreated, and in order to improve printability, adhesion, etc., the surface of the stretched polyester film may be treated by corona discharge or the like. i! LL! I! It may be something that has been done.
次いで、上記の延伸ポリエステルフィルムを熱収縮させ
て瓶に密着させて毎回包被づる。Next, the above-mentioned stretched polyester film is heat-shrinked to tightly fit the bottle and wrap it each time.
その際、加熱殺菌工程で延伸ポリエステルフィルムが白
化して不透明化するのを防止するため、前記延伸ポリエ
ステルフィルムを熱収縮させた後の残留熱収縮率が、肋
の幅方向に対して３５％以上、瓶の軸方向に対して１５
％以下となるように熱収縮させる。上記残留熱収縮率が
上記範囲を外れると、フィルムの不透明化、特に、延伸
ポリエステルフィルムのうち、瓶の軸方向上下端部に対
応する部分で不透明化が起る。At that time, in order to prevent the stretched polyester film from whitening and becoming opaque during the heat sterilization process, the residual heat shrinkage rate after heat shrinking the stretched polyester film should be 35% or more in the width direction of the ribs. , 15 with respect to the axial direction of the bottle
% or less. When the residual heat shrinkage rate is outside the above range, the film becomes opaque, particularly in the portions of the stretched polyester film corresponding to the upper and lower ends in the axial direction of the bottle.
より詳細には、熱収縮後における幅方向の残留熱収縮率
が小さくなるにつれて、軸方向の残留熱収縮率が大ぎく
なるように熱収縮させることにより、フィルムの不透明
化を防止することができる。More specifically, by heat-shrinking the film in such a way that the residual heat shrinkage in the axial direction increases as the residual heat shrinkage in the width direction decreases after heat shrinking, it is possible to prevent the film from becoming opaque. .
すなわち、１１方向の残留熱収縮率が３５％未満である
と、軸方向の残留熱収縮率が広い範囲で変イヒしてもフ
ィルムの不透明化が生じ易くなる。また、熱１＆縮後の
残留熱収縮率が、瓶の１島方向に対して３５％以上であ
って５５％未満となるように熱収縮させる場合、瓶の軸
方向に対する残留熱収縮率が、１％以上となるように熱
収縮させることにより、フィルムの不透明化を防止する
ことができる。特に、熱収縮後における幅方向の残留熱
収縮率が３５％以上であって５０％未満となるように熱
収縮させる場合には、軸方向の残留熱酸１縮率が少なく
とも１％以上、好ましくは、約２％以上となるように熱
収縮させるとフィルムの不透明化を防止することができ
る。また、幅方向の残留熱収縮率が５０％以上であって
５５％未満となるように熱収縮させる場合、軸方向の残
留熱収縮率が１％以上となるように熱収縮させることに
より、延伸ポリエステルフィルムの不透明化を防止する
ことができる。−方、幅方向の残留熱収縮率が５５％を
越えるときは、軸方向の残留熱収縮率が広い範囲で変化
しても、フィルムの不透明化は生じ難い。That is, if the residual heat shrinkage rate in the 11 directions is less than 35%, the film tends to become opaque even if the residual heat shrinkage rate in the axial direction varies over a wide range. In addition, when heat shrinking is performed so that the residual heat shrinkage rate after heat 1 & shrinkage is 35% or more and less than 55% in one island direction of the bottle, the residual heat shrinkage rate in the axial direction of the bottle is By heat-shrinking the film to 1% or more, it is possible to prevent the film from becoming opaque. In particular, when heat shrinking is performed so that the residual heat shrinkage rate in the width direction after heat shrinking is 35% or more and less than 50%, the residual thermal acid shrinkage rate in the axial direction is preferably at least 1% or more. The film can be prevented from becoming opaque by heat shrinking to about 2% or more. In addition, when heat shrinking is performed so that the residual heat shrinkage rate in the width direction is 50% or more and less than 55%, stretching is performed by heat shrinking so that the residual heat shrinkage rate in the axial direction is 1% or more. It is possible to prevent the polyester film from becoming opaque. On the other hand, when the residual heat shrinkage rate in the width direction exceeds 55%, the film is unlikely to become opaque even if the residual heat shrinkage rate in the axial direction varies over a wide range.
なお、熱収縮後の残留熱収縮率を上記のような範囲にづ
るには、熱収縮前の延伸ポリエステルフィルムの熱収縮
率、および瓶の外周長さを予め測定しておき、所定長さ
の上記熱収縮前の延伸ポリエステルフィルムを、上記残
留熱収縮率となるように瓶に巻き付け、熱収縮させれば
よい。In addition, in order to set the residual heat shrinkage rate after heat shrinkage within the above range, measure the heat shrinkage rate of the stretched polyester film before heat shrinkage and the outer circumference of the bottle in advance, and then The stretched polyester film before heat shrinking may be wrapped around a bottle and heat-shrinked so as to have the above-mentioned residual heat shrinkage rate.
上記の条件で各種の瓶に捲回包被すると、捲回包被後も
フィルムの延伸状態が維持されているので、長期に回り
瓶を緊密に包装できると共に、水蒸気や熱水等の影響を
受けず、フィルムが不透明化するのを防止できる。When various types of bottles are wrapped under the above conditions, the stretched state of the film is maintained even after wrapping, so the bottles can be wrapped tightly for a long time and are protected from the effects of water vapor, hot water, etc. This prevents the film from becoming opaque.
なお、上記フィルの熱収縮は、通常、瓶を富者包装する
のに必要な温度、例えば１００〜２５０℃の温度で行な
われる。この際、熱収縮させる加熱手段としては、遠赤
外線、熱風等の適宜の手段が用いられる。Note that the heat shrinkage of the above-mentioned fill is usually carried out at a temperature necessary for packaging bottles, for example, at a temperature of 100 to 250°C. At this time, appropriate means such as far infrared rays and hot air are used as heating means for thermal contraction.
次いで、捲回包被した各柿瓶内の内容物を水蒸気、熱水
等の加熱手段により加熱殺菌する。この加熱殺菌条件は
、瓶の内容物により、異なるが、迅速に殺菌し、かつ生
産性を高めるため、炭酸飲料の場合、５０〜６０℃の温
度で行なうのが好ましく、他の内容物の場合、少なくと
も８０°Ｃ１好ましくは９０°Ｃ以上の温度で適宜の時
間、例えば、１〜３０分間行なわれる。このような条件
で加熱殺菌を行なうと、内容物の変質が生じることがな
い。Next, the contents inside each persimmon bottle wrapped in a rolled-up container are heat sterilized using heating means such as steam or hot water. The heat sterilization conditions vary depending on the contents of the bottle, but in order to quickly sterilize and increase productivity, it is preferable to sterilize carbonated drinks at a temperature of 50 to 60°C, and for other contents. , at a temperature of at least 80° C., preferably 90° C. or higher, for a suitable period of time, for example, 1 to 30 minutes. If heat sterilization is performed under such conditions, the contents will not change in quality.
なお、ジュース等の内容物は、延伸ポリエステルフィル
ムを熱収縮させて瓶に密着させて捲回包被する前、また
は延伸ポリニスデルフィルムで瓶を捲回包被した後の何
れの工程でも充填覆ることができる。In addition, the contents such as juice can be filled either before the stretched polyester film is heat-shrinked and wrapped tightly around the bottle, or after the bottle is wrapped and wrapped with the stretched polyester film. Can be covered.
また、上記延伸ポリエステルフィルムとしては、例えば
、０．００５〜２ｍｍ等各種の厚みのものが使用できる
。さらには、上記延伸ｉＪζリエステルフィルｌ＼は、
熱収縮性を妨げない範囲で各種の合成樹脂フィルムまた
はシート、例えば、ポリエチレン、ポリプロピレン、ポ
リスチレン、ナイロン、セロファン、ポリ塩化ビニル、
ポリ塩化ビニリデン等のフィルム、シートと積層されて
いてもよい。このような積層フィルムを用いると、ポリ
ニスデルのもつ耐熱性等の緒特性の他に、熱接着性等の
特性を高めることができる。なお、上記合成樹脂フィル
ム、シー１−としては、延伸されて熟成１栴性を有する
ものであってもよく、非光泡、あるいは通常の′Ｑ泡剤
ど組合せて押出し発泡した光面フィルムまたはシー１〜
であって−しよい。Moreover, as the above-mentioned stretched polyester film, those having various thicknesses such as 0.005 to 2 mm can be used. Furthermore, the above-mentioned stretched iJζ ester fill l\ is
Various synthetic resin films or sheets, such as polyethylene, polypropylene, polystyrene, nylon, cellophane, polyvinyl chloride, as long as they do not impede heat shrinkability.
It may be laminated with a film or sheet such as polyvinylidene chloride. When such a laminated film is used, in addition to the heat resistance and other properties of polynisdel, it is possible to improve properties such as thermal adhesiveness. The above synthetic resin film, Sea 1-, may be one that has been stretched and has aging properties, or may be a non-light foam film, or a light surface film that is extruded and foamed in combination with a normal 'Q foam agent, etc. Sea 1~
It is good.
この発明は、フィルムの白化に伴なう不透明化を防止で
きるので、印刷等により各種模様等が施されている延伸
ポリエステルフィルムを用いる場合、特に好適である。This invention can prevent the film from becoming opaque due to whitening, so it is particularly suitable when using a stretched polyester film that has been given various patterns by printing or the like.
〈実施例〉 以下に、実施例に暴きこの発明の詳細な説明する。<Example> The present invention will now be described in detail by way of examples.
ポリエステルとして、Ｇ−ＰＥＴ（米国、イーストマン
・コダック社製）を用い、サーキュラ−ダイを用いてＴ
ダイ方式により溶融押出し、押出しと同時に、ピンテン
ター法により種々の延伸倍率で一軸延伸し、急冷した。G-PET (manufactured by Eastman Kodak, USA) was used as the polyester, and T was
It was melt-extruded using a die method, and simultaneously with the extrusion, it was uniaxially stretched at various stretching ratios using a pin tenter method, and then rapidly cooled.
得られた延伸ポリエステルフィルムは、表１に示す熱収
縮率を有するものであった。The obtained stretched polyester film had a heat shrinkage rate shown in Table 1.
そして、表１に示づ一種々の熱収縮率を有するポリエス
テルフィルムを、ジュースを充填したガラス瓶に巻き付
け、表１に示す残留熱収縮率となるように、２００°Ｃ
の温度で８秒間加熱して上記ガラス瓶に捲回包被した。Then, a polyester film having a heat shrinkage rate shown in Table 1 was wrapped around a glass bottle filled with juice, and heated to 200°C so that the residual heat shrinkage rate shown in Table 1 was achieved.
The mixture was heated for 8 seconds at a temperature of 100 mL and wrapped around the glass bottle.
この時点では、いずれのフィルムも白化現象が生じず、
透明であった。At this point, no whitening phenomenon occurred in any of the films.
It was transparent.
次いで、上記ガラス瓶内のジュースを加熱殺菌するため
、９０℃の熱水で２０分間処理したところ、表１に示す
ような結果を得た。Next, in order to heat sterilize the juice in the glass bottle, it was treated with hot water at 90°C for 20 minutes, and the results shown in Table 1 were obtained.
なお、表中、熱収縮６０のフィルムの熱収縮率は、フィ
ルムを１３０℃のオーブン中で１５秒間熱収縮させるこ
とにより、熱収縮前後のフィルｌ＼の寸法から求めた。In the table, the heat shrinkage rate of the film with a heat shrinkage rating of 60 was determined from the dimensions of the film before and after heat shrinkage by heat shrinking the film in an oven at 130° C. for 15 seconds.
また、熱収縮後のフィルムの残留熱収縮率は、フィルム
を熱収縮させて瓶に捲回包被した後、未だ熱収縮性を有
するフィルムを切除し、切除したフィルムを上記と同様
にして熱収縮させることにより、切除したフィルムの熱
収縮前後のＩＪ法から求めた。In addition, the residual heat shrinkage rate of the film after heat shrinking can be determined by heat shrinking the film, wrapping it around a bottle, cutting off the film that still has heat shrink properties, and heating the cut film in the same manner as above. It was determined by the IJ method before and after heat shrinking the cut film by shrinking it.
また、フィルムの不透明化は、目視により以下の基準で
判断した。Moreover, the opacity of the film was determined visually according to the following criteria.
○；透明、△：実用上許容しつる程度に若干不透明化し
たもの、Ｘ；不透明
また、表中、５５／１８等とあるのは、瓶の幅方向に対
づる熱収縮率が５５％であり、瓶の軸方向に対する熱収
縮率が１８％であることを示す。○: Transparent, △: Slightly opaque to a practically acceptable degree, This indicates that the heat shrinkage rate in the axial direction of the bottle is 18%.
（以下、余白）
表 １
この表１から明らかなように、上記延伸ポリエステルフ
ィルムのうち、熱収縮後の残留熱収縮率が３５％未満の
ものは、いずれ・し不透明化した。また、熱収縮後の幅
方向の残留熱収縮率が５０％で、軸方向の残留熱収縮率
が０％のものは、実用上支障のない範囲で若干不透明化
したが、他のものは、いずれも透明であった。(Hereinafter, blank spaces) Table 1 As is clear from Table 1, among the above-mentioned stretched polyester films, those having a residual heat shrinkage rate of less than 35% after heat shrinking eventually became opaque. In addition, the product with a residual heat shrinkage rate of 50% in the width direction and 0% in the axial direction after heat shrinking became slightly opaque to the extent that it does not cause any practical problems, but the other products All were transparent.
な、ｊ３、上記実施例と同様にして、熱収縮面の熱収縮
率５５／１０の延伸ポリエステルフィルムを用い、熱収
縮後の残留熱収縮率が５１／７となるように熱収縮させ
たところ、フィルムは透明であった。j3. In the same manner as in the above example, a stretched polyester film with a heat shrinkage rate of 55/10 on the heat-shrinkable side was heat-shrinked so that the residual heat-shrinkage rate after heat-shrinking was 51/7. , the film was transparent.
〈発明の効果〉
以上のように、この発明の破瓶防止用捲回ポリエステル
フィルムの不透明化防止方法によれば、延伸ポリエステ
ルフィルムとして、特定の熟成、縮率を有するものを用
い、熱収縮後の残留熱収縮率が特定の値となるように熱
収縮させて各種層に密着させて捲回包被するので、加熱
殺菌時にフィルムが白化して不透明化することがない。<Effects of the Invention> As described above, according to the method for preventing opacity of a wound polyester film for preventing bottle breakage of the present invention, a stretched polyester film having a specific aging and shrinkage ratio is used, and after heat shrinkage, Since the film is heat-shrinked so that the residual heat shrinkage rate becomes a specific value, and the film is wrapped and wrapped in close contact with various layers, the film will not whiten and become opaque during heat sterilization.
また、熱収縮後も、延伸ポリエステルフィルムは、延伸
状態が維持されているので、長期に回り緊密に密着包装
した状態を維持することができるというこの発明特有の
効果を奏づ′る。Further, even after heat shrinkage, the stretched polyester film maintains its stretched state, so it exhibits the unique effect of this invention that it can maintain a tightly packaged state for a long period of time.
Claims (1)
に対する残留熱収縮率が、１ ％以上となるように熱収縮させる上記特 許請求の範囲第１項記載の破瓶防止用捲 回ポリエステルフィルムの不透明化防止 方法。[Claims] 1. A method in which a stretched polyester film is heat-shrinked and wrapped around a bottle, and then the contents in the bottle are heat-sterilized, wherein the stretched polyester film has a heat shrinkage rate of: Use a material with a residual heat shrinkage rate of 40% or more in the width direction of the bottle and 20% or less in the axial direction of the bottle, and a residual heat shrinkage rate of 35% or more in the width direction of the bottle after heat contraction. A method for preventing opacity of a rolled polyester film for preventing bottle breakage, characterized by heat shrinking the film to 15% or less in the direction. 2. If the residual heat shrinkage rate of the stretched polyester film after heat shrinkage is 35% or more but less than 55% in the width direction of the bottle, the residual heat shrinkage rate in the axial direction of the bottle is 1% or more. A method for preventing opacity of a wound polyester film for preventing bottle breakage according to claim 1, which comprises heat-shrinking the film to achieve the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61193615A JPH0678098B2 (en) | 1986-08-18 | 1986-08-18 | Method for preventing opacity of wound polyester film for preventing bottle breakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61193615A JPH0678098B2 (en) | 1986-08-18 | 1986-08-18 | Method for preventing opacity of wound polyester film for preventing bottle breakage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6355052A true JPS6355052A (en) | 1988-03-09 |
| JPH0678098B2 JPH0678098B2 (en) | 1994-10-05 |
Family
ID=16310885
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61193615A Expired - Lifetime JPH0678098B2 (en) | 1986-08-18 | 1986-08-18 | Method for preventing opacity of wound polyester film for preventing bottle breakage |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0678098B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4983653A (en) * | 1986-11-12 | 1991-01-08 | Diafoil Company, Ltd. | Polyester shrinkable film containing benzotriazole |
| US4985538A (en) * | 1986-11-12 | 1991-01-15 | Diafoil Company, Limited | Shrinkable polyester film |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5278220A (en) * | 1975-12-15 | 1977-07-01 | Haishiito Kougiyou Kk | Method of reinforcing glass bottle by foamed protective sheet |
| JPS5864958A (en) * | 1981-10-09 | 1983-04-18 | 大日本インキ化学工業株式会社 | Heat-shrinkable film and method for heat-shrinkable packaging of articles using the heat-shrinkable film |
| JPS5997175A (en) * | 1982-11-26 | 1984-06-04 | グンゼ株式会社 | Polyester based shrink label with excellent low temperature shrinking property |
| JPS6099826A (en) * | 1983-10-29 | 1985-06-03 | 冨士シール工業株式会社 | Method of labelling vessel |
| JPS60204458A (en) * | 1984-03-30 | 1985-10-16 | 東レ株式会社 | Vessel |
| JPS6148112U (en) * | 1984-09-04 | 1986-03-31 | グンゼ株式会社 | Retort sterilizable glass bottle |
| JPS6292826A (en) * | 1985-10-18 | 1987-04-28 | Toyobo Co Ltd | Heat-shrinkable polyester-based tube |
| JPH0645267A (en) * | 1992-03-25 | 1994-02-18 | Nippon Steel Corp | Method and apparatus for producing silicon oxide thin film by plasma CVD |
-
1986
- 1986-08-18 JP JP61193615A patent/JPH0678098B2/en not_active Expired - Lifetime
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5278220A (en) * | 1975-12-15 | 1977-07-01 | Haishiito Kougiyou Kk | Method of reinforcing glass bottle by foamed protective sheet |
| JPS5864958A (en) * | 1981-10-09 | 1983-04-18 | 大日本インキ化学工業株式会社 | Heat-shrinkable film and method for heat-shrinkable packaging of articles using the heat-shrinkable film |
| JPS5997175A (en) * | 1982-11-26 | 1984-06-04 | グンゼ株式会社 | Polyester based shrink label with excellent low temperature shrinking property |
| JPS6099826A (en) * | 1983-10-29 | 1985-06-03 | 冨士シール工業株式会社 | Method of labelling vessel |
| JPS60204458A (en) * | 1984-03-30 | 1985-10-16 | 東レ株式会社 | Vessel |
| JPS6148112U (en) * | 1984-09-04 | 1986-03-31 | グンゼ株式会社 | Retort sterilizable glass bottle |
| JPS6292826A (en) * | 1985-10-18 | 1987-04-28 | Toyobo Co Ltd | Heat-shrinkable polyester-based tube |
| JPH0645267A (en) * | 1992-03-25 | 1994-02-18 | Nippon Steel Corp | Method and apparatus for producing silicon oxide thin film by plasma CVD |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4983653A (en) * | 1986-11-12 | 1991-01-08 | Diafoil Company, Ltd. | Polyester shrinkable film containing benzotriazole |
| US4985538A (en) * | 1986-11-12 | 1991-01-15 | Diafoil Company, Limited | Shrinkable polyester film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0678098B2 (en) | 1994-10-05 |
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