JP2855734B2 - Heat shrinkable film - Google Patents
Heat shrinkable filmInfo
- Publication number
- JP2855734B2 JP2855734B2 JP1342000A JP34200089A JP2855734B2 JP 2855734 B2 JP2855734 B2 JP 2855734B2 JP 1342000 A JP1342000 A JP 1342000A JP 34200089 A JP34200089 A JP 34200089A JP 2855734 B2 JP2855734 B2 JP 2855734B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- shrinkable film
- film
- label
- printed
- 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
Landscapes
- Wrappers (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明な熱収縮性フィルムに関し、詳細には容器，
瓶，缶，棒状物等（以下単に容器類と略す）の保護，結
束，ラベル貼り等を目的として、上記容器類のキャップ
部，肩部，胴部等の一部又は全部を被覆或は結束する包
装材料に用いられる熱収縮性フィルムに関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a heat-shrinkable film, specifically, a container,
Covering or bundling some or all of the caps, shoulders, body, etc. of the above containers for the purpose of protection, binding, labeling, etc. of bottles, cans, sticks, etc. (hereinafter simply referred to as containers). The present invention relates to a heat-shrinkable film used for a packaging material.
［従来の技術］ 熱収縮包装とは、例えば筒状若しくは袋状の熱収縮性
フィルムで商品を比較的ラフに筒み、次いでフィルムを
加熱収縮させて該フィルムを商品外周面に密着させる方
法であり、不規則な形状の容器類の包装であっても比較
的簡便に美しい包装外観を得ることができるので、熱収
縮性フィルムは自動化に適した材料として今後益々需要
の拡大が期待される。[Prior Art] Heat shrink wrapping is a method in which, for example, a product is relatively roughly cylindered with a tubular or bag-shaped heat-shrinkable film, and then the film is heated and shrunk to bring the film into close contact with the outer peripheral surface of the product. In addition, since a beautiful package appearance can be obtained relatively easily even in the case of packaging containers having irregular shapes, the demand for the heat-shrinkable film is expected to further increase in the future as a material suitable for automation.
ところが上記熱収縮性フィルムに印刷を施して筒状体
とし、例えばプラスチックボトル等の肩部に環状ラベル
として装着する場合、下記の様な課題が発生している。
プラスチックボトル等のラベリングにおいては、まずシ
ート状の熱収縮性フィルムの片面に一定間隔を置いて断
続的なラベル印刷を施し、次に該シート状熱収縮性フィ
ルムを印刷の施されていない透明部分でカットすること
によって各単位ラベルを個々に切り離し、該ラベルの両
サイドを貼り付けて筒状にし［従って筒状の両端には周
方向に非印刷部（透明部）が残される］、これをプラス
チックボトルの所定位置に被せて熱収縮することによっ
て行なわれているが、現状では第３図に示した様にラベ
ルの上下端に残される透明部分が内側にカールして折れ
曲がり外観を損ねている。However, in the case where the heat-shrinkable film is printed to form a tubular body and is attached as an annular label to a shoulder portion of, for example, a plastic bottle, the following problems occur.
In the labeling of a plastic bottle or the like, first, intermittent label printing is performed on one side of a sheet-like heat-shrinkable film at regular intervals, and then the sheet-like heat-shrinkable film is printed on a transparent portion where no printing is applied. Then, each unit label is cut off individually, and both sides of the label are attached to form a tube [so that a non-printed portion (transparent portion) is left circumferentially at both ends of the tube]. It is performed by covering the plastic bottle at a predetermined position and thermally shrinking it. However, at present, as shown in FIG. 3, the transparent portions remaining at the upper and lower ends of the label are curled inward and bent to deteriorate the appearance. .
［発明が解決しようとする課題］ 本発明はこの様な事情に着目してなされたものであっ
て、熱収縮性フィルムを素材とし、端部に透明部分を残
して印刷の施された筒状若しくは袋状の熱収縮性ラベル
において、該熱収縮性ラベル端部の透明部分に折れ曲が
りが発生しない様な熱収縮性フィルムの提供を目的とす
るものである。[Problems to be Solved by the Invention] The present invention has been made in view of such circumstances, and is made of a heat-shrinkable film as a material, and is formed by printing with a transparent portion left at an end. Another object of the present invention is to provide a heat-shrinkable film in which a transparent portion at an end of the heat-shrinkable label does not bend in a bag-shaped heat-shrinkable label.
［課題を解決する為の手段］ 上記課題を解決した本発明とは筒状若しくは袋状の熱
収縮性フィルムの開放端部に非印刷部分を残して印刷の
施された筒状若しくは袋状の熱収縮性フィルムにおい
て、少なくとも前記非印刷部分のいずれか片面及び／又
は両面を有機溶剤で非配向化もしくは配向緩和処理を施
してなることを要旨とするものである。[Means for Solving the Problems] The present invention solves the above-mentioned problems. A tubular or bag-shaped heat-shrinkable film having a non-printed portion left at the open end thereof is printed. In the heat-shrinkable film, at least one of and / or both surfaces of the non-printed portion is subjected to non-orientation or orientation relaxation treatment with an organic solvent.
［作用］ 本発明者らは鋭意研究の結果、熱収縮時に発生するカ
ールは非印刷部分と印刷部分とにおける熱収縮速度の違
いに起因するものであるとの知見を得て、本発明に想到
することとなった。そこで第４図及び第５図を参照しつ
つ以下説明する。[Effects] The inventors of the present invention have made intensive studies and have found that curl generated during heat shrinkage is caused by a difference in heat shrinkage speed between a non-printed portion and a printed portion. It was decided to do. Therefore, a description will be given below with reference to FIGS. 4 and 5.
熱収縮性フィルムに印刷を施すと、印刷インクが積層
された印刷部分では印刷インクによる補強作用を受ける
と共に印刷インク自信が熱収縮性を示すものではないと
ころから、無地の非印刷部分との間に熱挙動上の差が生
じる。即ち上記熱収縮性フィルムから作成した同一ラベ
ル上に収縮速度の速い部分［以下透明部分（４）と呼
ぶ］と収縮速度の遅い部分［以下印刷部分（５）と呼
ぶ］とが形成されることとなる。従って第４図において
熱収縮時間sec経過後の上記ラベルの状態は第５図
の様に透明部分（４）が先行して収縮していることとな
る為、収縮終了時では第５図の様な折れ曲がりが発生
することとなるのである。When printing is performed on the heat-shrinkable film, the printing portion where the printing ink is laminated receives the reinforcing effect of the printing ink, and the printing ink itself does not show heat shrinkage. Causes a difference in thermal behavior. That is, a portion having a high shrinking speed [hereinafter referred to as a transparent portion (4)] and a portion having a low shrinking speed [hereinafter referred to as a printed portion (5)] are formed on the same label formed from the heat-shrinkable film. Becomes Therefore, in FIG. 4, the state of the label after the elapse of the heat contraction time sec is that the transparent portion (4) has contracted earlier as shown in FIG. A serious bend will occur.
そこで本発明者らは透明部分（４）と印刷部分（５）
の収縮速度差をできる限りなくす方向で検討を重ねた結
果、有機溶剤を用いて透明部分（４）の少なくとも一部
に非配向化若しくは配向緩和処理を施せば該透明部分
（４）の収縮速度を抑制することが可能になるとの知見
を得、熱収縮後の折れ込みを防止し得たものである。こ
れは延伸加工によって配向化されているフィルムの表面
を有機溶剤により部分的に溶解乃至膨潤させることによ
って、高分子鎖の配向度を減少させた結果、上記透明部
分（４）の収縮速度を抑制できたものと考えられる。尚
本発明では熱収縮終了時点までに透明部分（４）の収縮
速度を抑制できれば良いので、非揮発性有機溶剤で処理
することによって熱収縮時に透明部分（４）が印刷部分
（３）より先に配向化の緩和が信号するようにしても良
い。Therefore, the present inventors have proposed a transparent part (4) and a printed part (5).
As a result of repeated studies in a direction to minimize the difference in the shrinkage speed of the transparent portion (4), if at least a part of the transparent portion (4) is subjected to a non-orientation or orientation relaxation treatment using an organic solvent, the shrinkage speed of the transparent portion (4) is reduced. It has been found that it is possible to suppress the breakage after heat shrinkage. This reduces the degree of orientation of the polymer chains by partially dissolving or swelling the surface of the film that has been oriented by the stretching process with an organic solvent, thereby suppressing the shrinkage rate of the transparent portion (4). It is considered possible. In the present invention, since it is sufficient that the shrinking speed of the transparent portion (4) can be suppressed by the end of the heat shrinkage, the transparent portion (4) is earlier than the printed portion (3) during the heat shrinkage by treating with a non-volatile organic solvent. May be signaled to ease the orientation.
本発明における熱収縮性フィルムはその種類が限定さ
れるものではなく、有機溶剤可溶性若しくは膨潤性のフ
ィルムであれば適用でき、例えばポリアミドフィルム，
ポリエチレンフィルム，ポリプロピレンフィルム，ポリ
スチレンフィルム，ポリ塩化ビニルフィルム，ポリ塩化
ビニルデンフィルム，ポリエステルフィルム及び塩酸ゴ
ムフィルム等の熱収縮性フィルムが適用可能である。The type of the heat-shrinkable film in the present invention is not limited, and may be any organic solvent-soluble or swellable film. For example, a polyamide film,
A heat-shrinkable film such as a polyethylene film, a polypropylene film, a polystyrene film, a polyvinyl chloride film, a polyvinyl chloride film, a polyester film and a rubber hydrochloride film is applicable.
また本発明に適用できる有機溶剤は、上記熱収縮性フ
ィルムを溶解乃至膨潤させることができるものであれば
良く、例えばメチルエチルケトン，シクロヘキサノン，
ベンジルアルコール，酢酸メチル，酢酸エチル，酢酸ア
ミル，ジオキサン，テトラヒドロフラン，ベンゼン，ト
ルエン，キシレン，クレゾール及び四塩化炭素，四塩化
エタン等のハロゲン化炭化水素等を挙げることができ、
これら有機溶剤は単独又は混合溶剤として用いることが
できる。The organic solvent applicable to the present invention is not particularly limited as long as it can dissolve or swell the heat-shrinkable film, and examples thereof include methyl ethyl ketone, cyclohexanone, and the like.
Examples include benzyl alcohol, methyl acetate, ethyl acetate, amyl acetate, dioxane, tetrahydrofuran, benzene, toluene, xylene, cresol, and halogenated hydrocarbons such as carbon tetrachloride and ethane tetrachloride.
These organic solvents can be used alone or as a mixed solvent.
尚該有機溶剤の塗布位置については、第２図に実施態
様を示した様に、少なくとも透明部分の一部分に塗布す
ることによって熱収縮性フィルムの配向性を低下させる
ことができれば良く、さらに外面側に塗布しても良い。As shown in the embodiment in FIG. 2, the application position of the organic solvent may be such that the orientation of the heat-shrinkable film can be reduced by applying the organic solvent to at least a part of the transparent portion. May be applied.
［実施例］ 熱収縮率が50％である熱収縮性ポリエステルフィルム
の片面に印刷を施し上下両端に1.5mmの透明部分を有す
るラベルを作成し筒状の比較例試験片を得た。[Example] Printing was performed on one side of a heat-shrinkable polyester film having a heat-shrinkage ratio of 50%, and a label having 1.5 mm transparent portions at both upper and lower ends was prepared, thereby obtaining a cylindrical comparative test piece.
次に該ラベルの印刷面側で上下両端から約2mmの部分
（透明部分1.5mm及び印刷部分の上端0.5mm）に、酢酸エ
チルとメチルエチルケトンとの混合溶剤（混合比率70/3
0容積比）を8g/m2塗布して乾燥し、筒状の本発明試験片
を得た。Next, on the printing surface side of the label, about 2 mm from the upper and lower ends (1.5 mm for the transparent part and 0.5 mm for the upper end of the printed part), a mixed solvent of ethyl acetate and methyl ethyl ketone (mixing ratio 70/3)
(0 volume ratio) was applied at 8 g / m 2 and dried to obtain a cylindrical test piece of the present invention.
上記試験片をガラス瓶にかぶせ155℃で４秒間加熱し
熱収縮した後、透明部分のカールをチェックした。透明
部分のカールの評価は目視検査によって行ない、円周方
向の先端部に１か所でも折れ曲がりが観察されたものは
カールが発生したものと判断した。結果は第１表に示
す。The test piece was placed on a glass bottle, heated at 155 ° C. for 4 seconds, and thermally shrunk. Then, the curl of the transparent portion was checked. The curl of the transparent portion was evaluated by visual inspection, and if any bend was observed at one end in the circumferential direction, it was determined that the curl occurred. The results are shown in Table 1.
一方筒状に形成する前に上記ラベルを140℃で加熱
し、熱収縮開始１秒後,2秒後,4秒後における透明部分と
印刷部分の熱収縮率卸び透明部分の熱収縮率を下記の方
法によって測定し、夫々両者の熱収縮率差を求めた。結
果は第２表に示す。On the other hand, before forming into a cylindrical shape, the above label is heated at 140 ° C., and the heat shrinkage ratio of the transparent portion and the printed portion after 1 second, 2 seconds, and 4 seconds after the start of heat shrinkage is calculated. The measurement was carried out by the following method, and the difference between the two thermal shrinkage rates was determined. The results are shown in Table 2.
［熱収縮率］ ラベルを筒状に形成した場合の円周方向にあたる方向
についての長さを計測し、加熱前の長さをl1,熱収縮後
の長さをl2としたとき、 を熱収縮率（％）とした。[Thermal shrinkage] When the label is formed in a cylindrical shape, the length in the circumferential direction is measured, and when the length before heating is l 1 and the length after heat shrinking is l 2 , Was defined as the heat shrinkage (%).
実施例は印刷部分と透明部分の熱収縮速度がほぼ等し
いので、熱収縮開始１秒後,2秒後における熱収縮率差が
小さく、ラベル上下両端にカールは見られない。これに
対し比較例は熱収縮開始１秒後,2秒後における熱収縮率
差が大きい為に円周方向に沿って数箇所で折れ込みが発
生している。 In the embodiment, since the heat shrinkage speeds of the printed portion and the transparent portion are substantially equal, the difference in the heat shrinkage between 1 second and 2 seconds after the start of the heat shrinkage is small, and no curl is observed at the upper and lower ends of the label. On the other hand, in the comparative example, since the difference in the thermal shrinkage rate between 1 second and 2 seconds after the start of the thermal shrinkage is large, breakage occurs at several places along the circumferential direction.
［発明の効果］ 本発明は以上の様に構成されているので、ボトルにラ
ベリングする際に発生していた透明部分の内側への折れ
込みを防止でき、もって商品の美的外観を向上させ商品
価値を高めることができた。[Effects of the Invention] Since the present invention is configured as described above, it is possible to prevent the transparent portion, which has been generated when labeling a bottle, from being folded into the inside, thereby improving the aesthetic appearance of the product and increasing its commercial value. Could be raised.
第１図は本発明の主な実施態様を示す熱収縮性フィルム
の参考断面図、第２図は第１図以外の実施態様を示す熱
収縮性フィルムの参考断面図、第３図はボトルに熱収縮
性フィルムをラベリングした際のカール状態を示す参考
外観図、第４図は透明部分と印刷部分の熱収縮速度の違
いを示すグラフ、第５図は熱収縮の経時変化を示す状態
説明参考図である。 １……熱収縮性フィルム、２……印刷インク ３……有機溶剤塗布部、４……透明部分 ５……印刷部分FIG. 1 is a reference cross-sectional view of a heat-shrinkable film showing a main embodiment of the present invention, FIG. 2 is a reference cross-sectional view of a heat-shrinkable film showing an embodiment other than FIG. 1, and FIG. Reference external view showing the curl state when labeling a heat-shrinkable film, FIG. 4 is a graph showing the difference in heat shrinkage rate between a transparent part and a printed part, and FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Heat-shrinkable film, 2 ... Printing ink 3 ... Organic solvent application part 4, ... Transparent part 5 ... Printing part
Claims (1)
放端部に非印刷部分を残して印刷を施された筒状若しく
は袋状の熱収縮性フィルムにおいて、少なくとも前記非
印刷部分のいずれか片面及び／又は両面を有機溶剤で非
配向化若しくは配向緩和処理を施してなることを特徴と
する熱収縮性フィルム。1. A tubular or bag-shaped heat-shrinkable film having a non-printed portion left at an open end of the tubular or bag-shaped heat-shrinkable film, wherein at least one of the non-printed portions is provided. A heat-shrinkable film, wherein one side and / or both sides are subjected to non-orientation or orientation relaxation treatment with an organic solvent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1342000A JP2855734B2 (en) | 1989-12-29 | 1989-12-29 | Heat shrinkable film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1342000A JP2855734B2 (en) | 1989-12-29 | 1989-12-29 | Heat shrinkable film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03203935A JPH03203935A (en) | 1991-09-05 |
| JP2855734B2 true JP2855734B2 (en) | 1999-02-10 |
Family
ID=18350402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1342000A Expired - Lifetime JP2855734B2 (en) | 1989-12-29 | 1989-12-29 | Heat shrinkable film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2855734B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9503274D0 (en) * | 1995-02-21 | 1995-04-12 | Sun Electric Uk Ltd | Method and apparatus for machine diagnosis |
| FR2733733B1 (en) * | 1995-05-05 | 1997-06-13 | Serre Robert | METHOD AND DEVICE FOR PRINTING AND MANUFACTURING PACKAGING SLEEVES OR SLEEVES AND RELATED PRODUCTS |
| JPH1142706A (en) * | 1997-07-25 | 1999-02-16 | Gunze Ltd | Thermal contraction polyester film and vessel having the same mounted thereon |
| JP3825426B2 (en) * | 2003-06-24 | 2006-09-27 | グンゼ株式会社 | Method for preventing folding of heat-shrinkable polyester film to the container side |
-
1989
- 1989-12-29 JP JP1342000A patent/JP2855734B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03203935A (en) | 1991-09-05 |
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