JPH0686091B2 - Label film with good adhesion - Google Patents
Label film with good adhesionInfo
- Publication number
- JPH0686091B2 JPH0686091B2 JP60133960A JP13396085A JPH0686091B2 JP H0686091 B2 JPH0686091 B2 JP H0686091B2 JP 60133960 A JP60133960 A JP 60133960A JP 13396085 A JP13396085 A JP 13396085A JP H0686091 B2 JPH0686091 B2 JP H0686091B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- film
- stress
- shrinkage
- stress relaxation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- 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〕 本発明は、ガラスビン，金属缶，プラスチックビンや各
種キャップ等の外面に熱収縮により被覆して，ガラスビ
ン等の破損および飛散を防止したり，外観を美麗にみせ
たりするための合成樹脂フィルムからなる密着性の良好
なラベルフィルムに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention covers the outer surfaces of glass bottles, metal cans, plastic bottles, various caps, etc. by heat shrinkage to prevent damage and scattering of glass bottles, etc. The present invention relates to a label film having good adhesion, which is made of a synthetic resin film for giving a beautiful appearance.
従来，ガラスビンや金属缶の内容表示やファッション性
を付与する方法としては，ガラスビンや金属缶などの本
体に直接印刷したものが多くみられる。Conventionally, as a method of displaying the contents of glass bottles and metal cans and imparting fashionability, many methods of directly printing on the body of glass bottles or metal cans are seen.
しかし，これらの方法は，コスト的に高くついたり，フ
ァッション性が付与できなかったり，リサイクル使用し
た場合に同一商品にしか使用できないという大きな欠点
を有していた。However, these methods have major drawbacks such as high cost, being unable to impart fashionability, and being able to be used only for the same product when recycled.
そこで，ガラスビンや金属缶を合成樹脂フィルムで熱収
縮被覆する試みがなされた。Therefore, an attempt was made to heat-shrink glass bottles and metal cans with a synthetic resin film.
しかし，合成樹脂フィルムを用いて熱収縮被覆したもの
は，ガラスビン等を熱収縮ラベルして経時放置中に，フ
ィルムの応力緩和からフィルムがゆるんだり，端部が開
く（口開き）という問題がおこり，ラベルフィルムが目
的とする破損，飛散防止およびファッション性の付与の
点で満足のいくものではなかった。However, when heat-shrink coated with a synthetic resin film, there is a problem that the film loosens or the ends open (mouth opening) due to stress relaxation of the film during heat-shrink labeling of glass bottles etc. However, the label film was not satisfactory in terms of target damage, scattering prevention, and fashionability.
本発明者らは，ガラスビンなどの熱収縮被覆に用いるこ
とができる，被覆後経時放置中にゆるまず，口開の生じ
ないラベルフィルムを提供することを目的として鋭意研
究した結果，本発明を完成した。The present inventors have completed the present invention as a result of earnest research aimed at providing a label film that can be used for heat-shrink coating of glass bottles, etc. did.
すなわち、本発明は，ガラスビンや金属缶などの筒状物
を熱収縮被覆するために用いる筒状の一軸延伸ラベルフ
ィルムであって、 （ａ）・エチレン含量2.5〜７％の結晶性エチレン−プ
ロピレンランダムコポリマー、或いは、 ・重合度500〜2,000の塩化ビニル樹脂からなり、 （ｂ） 収縮直後の応力が18Kg/cm2以上であり、且つ、 （ｃ） 100℃で２分間加熱後の熱収縮応力緩和曲線に
おける応力緩和率Ｙが０％以下であることを特徴とする
密着性の良好なラベルフィルムに関する。That is, the present invention relates to a tubular uniaxially stretched label film used for heat-shrink coating a tubular product such as a glass bottle or a metal can, comprising: (a) crystalline ethylene-propylene having an ethylene content of 2.5 to 7%. Random copolymer or composed of vinyl chloride resin having a degree of polymerization of 500 to 2,000, (b) the stress immediately after shrinkage is 18 kg / cm 2 or more, and (c) the heat shrinkage stress after heating at 100 ° C for 2 minutes. The stress relaxation rate Y in the relaxation curve is 0% or less, and relates to a label film having good adhesion.
〔ただし、応力緩和率（Ｙ）は，加熱熱収縮直後の応力
（Ａ）（Kg/cm2）と，熱収縮後の最大応力（Ｂ）（Kg/c
m2）とから，式Ｙ（％）＝（Ａ−Ｂ）×100/Aによって
求められる値である。〕 本発明において使用される合成樹脂としては、結晶性エ
チレン−プロピレンランダム共重合体，及び塩化ビニル
樹脂（重合度500〜2000）がある。[However, the stress relaxation rate (Y) is defined as the stress (A) (Kg / cm 2 ) immediately after heat-shrinkage and the maximum stress (B) (Kg / c 2 ) after heat-shrinkage.
m 2 ) and the formula Y (%) = (A−B) × 100 / A. The synthetic resin used in the present invention includes a crystalline ethylene-propylene random copolymer and a vinyl chloride resin (polymerization degree: 500 to 2000).
本発明においてラベルフィルムは，このフィルムについ
て測定した100℃で２分間加熱後の熱収縮応力緩和曲線
における応力緩和率（Ｙ）が０（％）以下であることが
必要である。In the present invention, the label film needs to have a stress relaxation rate (Y) of 0 (%) or less in the heat shrinkage stress relaxation curve after heating the film at 100 ° C. for 2 minutes.
前記の応力緩和率が０（％）より大きいと，このラベル
フィルムを用いてガラスビン等を熱収縮ラベルして経時
放置中に，フィルムの応力緩和からフィルムがゆるんだ
り，端部の口開きが発生するので好ましくない。If the above stress relaxation rate is greater than 0 (%), the label film will be heat-shrink labeled and the film will loosen due to the stress relaxation of the film and open the edges of the end while it is left standing for a long time. Is not preferred.
本願の明細書においてフィルムの熱収縮応力緩和曲線
は、熱収縮応力測定装置（日理工業（株）製）を用い，
試料（JIS 2号ダンベルで打ち抜いたもの）について下
記で測定したものである。In the specification of the present application, the heat shrinkage stress relaxation curve of the film was measured by using a heat shrinkage stress measuring device (manufactured by Nichi Kogyo Co., Ltd.)
It is measured below for a sample (punched with JIS No. 2 dumbbell).
１）試料をチャックにセットする。1) Set the sample on the chuck.
２）加熱ヒーター部分（温度100℃）を試料にかぶせ
る。2) Cover the sample with the heater part (temperature 100 ℃).
３）所定の加熱時間（120秒;2分間）経過後，加熱ヒー
ター部分をとり除く。3) After the predetermined heating time (120 seconds; 2 minutes) has elapsed, remove the heater part.
４）室温での応力緩和状態をレコーダーで記録する。4) Record the stress relaxation state at room temperature with a recorder.
本発明のラベルフィルムは，例えば合成樹脂をＴ−ダイ
から溶融押出し成形して得られるシートを，縦方向また
は横方向に一軸延伸し，それ自体公知の方法により封間
タイプにシールすることによって好適に得ることができ
る。The label film of the present invention is suitable, for example, by uniaxially stretching a sheet obtained by melt-extruding a synthetic resin from a T-die in the longitudinal direction or the transverse direction, and sealing it in a sealing type by a method known per se. Can be obtained.
以下に実施例を示す。Examples will be shown below.
実施例１ エチレン含量４％,MFI（メルトフローレイトインデック
ス,ASTM D 1238）3.0g/10分，融点138℃の結晶性エチレ
ン−プロピレンランダムコポリマーと押出機に供給し,T
−ダイから押出された溶融シートを40℃に保たれた冷却
ロールで密着冷却して，シートを得た。Example 1 Ethylene content 4%, MFI (melt flow rate index, ASTM D 1238) 3.0 g / 10 min, melting point 138 ° C. crystalline ethylene-propylene random copolymer and fed to extruder, T
-The molten sheet extruded from the die was closely cooled with a cooling roll kept at 40 ° C to obtain a sheet.
このシートを所定の温度と延伸倍率に保たれたテンター
に導き，横方向に一軸延伸した後,60℃以上の温度で熱
固定して厚さ60μの一軸延伸フィルムを得た。This sheet was introduced into a tenter maintained at a predetermined temperature and draw ratio, uniaxially stretched in the transverse direction, and then heat-set at a temperature of 60 ° C. or higher to obtain a uniaxially stretched film having a thickness of 60 μm.
このフィルムの熱収縮応力緩和曲線（100℃,120秒間加
熱）を測定し，その応力緩和率（Ｙ）〔Ｙ＝（Ａ−Ｂ）
×100/A（％）〕を求めた。The heat shrinkage stress relaxation curve (100 ° C., 120 seconds heating) of this film was measured, and the stress relaxation rate (Y) [Y = (AB)
× 100 / A (%)] was determined.
さらに，このフィルムを封間タイプにシールし，直径が
73mmのチューブ（ラベルフィルム）を得た。該チューブ
を，直径68mmのガラスビンに装着し,230℃に保たれたオ
ーブン中に導入し,15秒間加熱後，フィルムで被覆され
たガラスビンを取り出し，常温に約１ケ月放置して被覆
フィルム端部の口開き，ゆるみをそれぞれ目視で判定し
た。Furthermore, by sealing this film in a sealing type,
A 73 mm tube (label film) was obtained. The tube was attached to a glass bottle with a diameter of 68 mm, introduced into an oven maintained at 230 ° C, heated for 15 seconds, the glass bottle covered with the film was taken out, and the glass bottle was left at room temperature for about 1 month and the end portion of the coated film was removed. The mouth opening and looseness were visually evaluated.
結果をまとめて表１に示す。The results are summarized in Table 1.
実施例２ 塩化ビニール樹脂（PVC,重合度800）を押出機に供給し,
T−ダイから押出された（樹脂温度205℃）溶融シートを
50℃に保たれた冷却ロールで密着冷却して，シート（厚
さ120μ）を得た。 Example 2 A vinyl chloride resin (PVC, polymerization degree 800) was fed to an extruder,
The molten sheet extruded from the T-die (resin temperature 205 ° C)
Sheets (thickness 120μ) were obtained by contact cooling with a cooling roll kept at 50 ° C.
このシートを，予熱温度95℃，延伸温度90℃，延伸倍率
３倍に保たれたテンターに導き，横方向に一軸延伸した
後,60℃以上の温度で熱固定して厚さ40μの一軸延伸フ
ィルムを得た。This sheet was introduced into a tenter that was kept at a preheating temperature of 95 ℃, a drawing temperature of 90 ℃, and a draw ratio of 3 times, uniaxially stretched in the transverse direction, and then heat-set at a temperature of 60 ℃ or more to uniaxially stretch with a thickness of 40µ. I got a film.
このフィルムの熱収縮応力緩和曲線（100℃,120秒間加
熱）を測定し，応力緩和率を求めた。Ａが30.4Kg/cm2,B
が39.2Kg/cm2,Yが−28.9（％）であった。The heat shrinkage stress relaxation curve (100 ° C, 120 seconds heating) of this film was measured to determine the stress relaxation rate. A is 30.4Kg / cm 2 , B
Was 39.2 Kg / cm 2 and Y was −28.9 (%).
さらに，このフィルムから実施例１と同様にして筒状フ
ィルムをつくり,230℃に保たれたギアオーブン中に導入
し,5秒間加熱後，フィルムが被覆されたガラスビンを取
り出し，常温に約１ケ月放置して被覆フィルムの口開
き，ゆるみを目視で判定したが，変化が認められず良好
であった。Furthermore, a tubular film was prepared from this film in the same manner as in Example 1, introduced into a gear oven maintained at 230 ° C., heated for 5 seconds, and then the glass bottle covered with the film was taken out and kept at room temperature for about 1 month. The coating film was allowed to stand and the mouth of the coating film was visually checked for looseness, but no change was observed and it was good.
前述のように，本発明によれば，フィルム成形条件を滴
宜選択することにより，簡単な操作で，ガラスビン，金
属缶，プラスチックビンや各種キャップ等の外面に熱収
縮被覆して，破損や飛散の防止およびファッション性付
与が可能である，密着性の良好なラベルフィルムを得る
ことができる。As described above, according to the present invention, by appropriately selecting film forming conditions, the outer surface of a glass bottle, a metal can, a plastic bottle, various caps or the like is heat-shrink coated by a simple operation, and damage or scattering occurs. It is possible to obtain a label film having good adhesiveness, which can prevent the occurrence of the above and impart fashionability.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭52−117375（ＪＰ，Ａ) 特開 昭54−145771（ＪＰ，Ａ) 特開 昭58−108112（ＪＰ，Ａ) 特公 昭57−36142（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── --- Continued from the front page (56) References JP-A-52-117375 (JP, A) JP-A-54-145771 (JP, A) JP-A-58-108112 (JP, A) JP-B 57- 36142 (JP, B2)
Claims (1)
被覆するために用いる筒状の一軸延伸ラベルフィルムで
あって、 （ａ）・エチレン含量2.5〜７％の結晶性エチレン−プ
ロピレンランダム共重合体、または、 ・重合度500〜2,000の塩化ビニル樹脂からなり、 （ｂ） 収縮直後の応力が18Kg/cm2以上であり、且つ、 （ｃ） 100℃で２分間加熱後の熱収縮応力緩和曲線に
おける応力緩和率Ｙが０％以下である 密着性の良好なラベルフィルム。 〔ただし、応力緩和率（Ｙ）（％）は、加熱熱収縮直後
の応力（Ａ）（Kg/cm2）と、熱収縮後の最大応力（Ｂ）
（Kg/cm2）とから、 式Ｙ（％）＝（Ａ−Ｂ）×100/A によって求められる値である。〕1. A tubular uniaxially stretched label film used for heat-shrink coating a tubular material such as a glass bottle or a metal can, comprising: (a) a crystalline ethylene-propylene random having an ethylene content of 2.5 to 7%. Copolymer or composed of vinyl chloride resin having a degree of polymerization of 500 to 2,000, (b) the stress immediately after shrinkage is 18 kg / cm 2 or more, and (c) heat shrinkage after heating at 100 ° C for 2 minutes. A label film with good adhesion, in which the stress relaxation rate Y in the stress relaxation curve is 0% or less. [However, the stress relaxation rate (Y) (%) is the stress (A) (Kg / cm 2 ) immediately after heat-shrinkage and the maximum stress (B) after heat-shrinkage)
(Kg / cm 2 ) and the value obtained by the formula Y (%) = (AB) × 100 / A. ]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60133960A JPH0686091B2 (en) | 1985-06-21 | 1985-06-21 | Label film with good adhesion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60133960A JPH0686091B2 (en) | 1985-06-21 | 1985-06-21 | Label film with good adhesion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61293834A JPS61293834A (en) | 1986-12-24 |
| JPH0686091B2 true JPH0686091B2 (en) | 1994-11-02 |
Family
ID=15117102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60133960A Expired - Fee Related JPH0686091B2 (en) | 1985-06-21 | 1985-06-21 | Label film with good adhesion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0686091B2 (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52117375A (en) * | 1976-03-30 | 1977-10-01 | Asahi Dow Ltd | Contraction film and its method of manufacture |
| JPS54145771A (en) * | 1978-05-08 | 1979-11-14 | Asahi Chem Ind Co Ltd | Shrinkable polyethylene film for sleeve wrapping free from crosslinking |
| JPS5736142A (en) * | 1980-08-14 | 1982-02-26 | Adeka Argus Chem Co Ltd | Composition of resin containing halogen |
| JPS58108112A (en) * | 1981-12-23 | 1983-06-28 | Denki Kagaku Kogyo Kk | Shrinkable film of styrene resin |
-
1985
- 1985-06-21 JP JP60133960A patent/JPH0686091B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61293834A (en) | 1986-12-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |