JP2007308164A - Heat shrinkable film and film applied item - Google Patents

Heat shrinkable film and film applied item Download PDF

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JP2007308164A
JP2007308164A JP2006138854A JP2006138854A JP2007308164A JP 2007308164 A JP2007308164 A JP 2007308164A JP 2006138854 A JP2006138854 A JP 2006138854A JP 2006138854 A JP2006138854 A JP 2006138854A JP 2007308164 A JP2007308164 A JP 2007308164A
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heat
shrinkable film
container
film
end portion
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JP4785616B2 (en
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Takehito Sasaki
健仁 佐々木
Keisuke Masuda
圭介 増田
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ASAI BUSSAN KK
CI Kasei Co Ltd
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ASAI BUSSAN KK
CI Kasei Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat shrinkable film capable of covering an item in a short time positively and without producing any irregular state and wrinkles and further provide an item covered by the film with less amount of irregular pattern and wrinkles. <P>SOLUTION: A front end 12 of a heat shrinking film 10 is adhered to a container 15, the heat shrinking film 10 is wound around the container 15, a rear end 13 of the heat shrinking film 10 is adhered to the front end 12, the heat shrinking film 10 is heated and shrunk to cover the container 15. The heat shrinking film 10 is provided with an adhering part 14 at the front end 12 and the rear end 13, and the adhering part 14 contains an optical radical polymerization initiator and contains an ultraviolet curable adhesive agent 11 with a viscosity at 90°C of 3000 mPa s or more. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、容器等の物品を被覆するラベル等に用いられる熱収縮性フィルムおよびフィルム付き物品に関する。   The present invention relates to a heat-shrinkable film used for a label or the like that covers an article such as a container, and an article with a film.

ガラスボトル、プラスチックボトル等の容器を、内容物名、商品名、図柄等が印刷された熱収縮性フィルムからなるラベルで被覆することが行われている。
容器をラベルで被覆する方法としては、熱収縮性フィルムを筒状に加工する工程、該筒状の熱収縮性フィルムを容器に被せる工程、熱収縮性フィルムを加熱して、熱収縮性フィルムを容器の大きさ、形状に合わせて収縮させる工程を有する方法が知られている。
しかし、該方法では、３つの工程が必要なため、ラベルを作製するのに時間と手間がかかるという問題がある。 A container such as a glass bottle or a plastic bottle is covered with a label made of a heat-shrinkable film on which contents, product names, designs, etc. are printed.
As a method of covering the container with a label, a step of processing the heat-shrinkable film into a cylindrical shape, a step of covering the cylindrical heat-shrinkable film on the container, heating the heat-shrinkable film, There is known a method having a step of shrinking in accordance with the size and shape of a container.
However, since this method requires three steps, there is a problem that it takes time and labor to produce a label.

短時間で容器をラベルで被覆できる方法としては、熱収縮性フィルムの前端部を容器に接着し、熱収縮性フィルムを容器に巻き付け、熱収縮性フィルムの後端部を前端部に接着し、熱収縮性フィルムを加熱して収縮させる方法（巻き付け法）が知られており、接着には、粘着剤やホットメルト接着剤（特許文献１、２）、紫外線硬化型接着剤（特許文献３）が用いられている。   As a method of covering the container with a label in a short time, the front end of the heat shrinkable film is adhered to the container, the heat shrinkable film is wrapped around the container, the rear end of the heat shrinkable film is adhered to the front end, A method of shrinking by heating a heat-shrinkable film (wrapping method) is known. For adhesion, a pressure-sensitive adhesive, a hot-melt adhesive (Patent Documents 1 and 2), and an ultraviolet curable adhesive (Patent Document 3). Is used.

しかし、粘着剤は、接着力が低いため、熱収縮性フィルムを容器に巻き付ける際に熱収縮性フィルムにかかるテンションによって、熱収縮性フィルムの前端部が容器から外れてしまうという問題がある。
ホットメルト接着剤は、接着の際に加熱が必要なため、該加熱によって熱収縮性フィルムの前端部および後端部が先に収縮してしまう。その結果、熱収縮性フィルムの収縮にムラおよびしわが生じる。 However, since the adhesive has a low adhesive force, there is a problem that the front end of the heat-shrinkable film is detached from the container due to the tension applied to the heat-shrinkable film when the heat-shrinkable film is wound around the container.
Since the hot melt adhesive needs to be heated at the time of bonding, the front end portion and the rear end portion of the heat-shrinkable film are first contracted by the heating. As a result, unevenness and wrinkles occur in the shrinkage of the heat-shrinkable film.

特許文献３の紫外線硬化型接着剤は、適用温度において粘度が２０００ｃｐｓ（２０００ｍＰａ・ｓ）以下とかなり低いため、硬化前の接着力は不充分である。そのため、熱収縮性フィルムを容器に巻き付ける際に、（ｉ）熱収縮性フィルムの前端部が容器から外れる、（ii）熱収縮性フィルムとと容器との位置がずれる、（iii)熱収縮性フィルムの前端部と後端部とが剥がれる、（iv）熱収縮性フィルムの前端部と後端部との位置がずれる。または、熱収縮性フィルムを容器に巻き付ける前に、熱収縮性フィルムの前端部の紫外線硬化型接着剤を硬化させ、熱収縮性フィルムの前端部を容器に充分に接着させる必要がある。
特公平３−５２３３６号公報 特公平４−７２６８７号公報 特開２００１−３４３８９５号公報 The ultraviolet curable adhesive of Patent Document 3 has a viscosity as low as 2000 cps (2000 mPa · s) or less at the application temperature, and therefore the adhesive force before curing is insufficient. Therefore, when the heat-shrinkable film is wound around the container, (i) the front end portion of the heat-shrinkable film is detached from the container, (ii) the positions of the heat-shrinkable film and the container are deviated, (iii) heat-shrinkable The front end portion and the rear end portion of the film are peeled off. (Iv) The positions of the front end portion and the rear end portion of the heat shrinkable film are shifted. Or before winding a heat-shrinkable film around a container, it is necessary to harden the ultraviolet curing adhesive of the front-end part of a heat-shrinkable film, and to fully adhere | attach the front-end part of a heat-shrinkable film to a container.
Japanese Patent Publication No. 3-52336 Japanese Patent Publication No. 4-72687 JP 2001-343895 A

よって、本発明の目的は、短時間で、確実に、かつムラおよびしわを生じることなく物品を被覆できる熱収縮性フィルム、および物品を被覆するフィルムにムラおよびしわが少ないフィルム付き物品を提供することにある。   Therefore, an object of the present invention is to provide a heat-shrinkable film that can cover an article in a short time, reliably and without causing unevenness and wrinkles, and an article with a film that has less unevenness and wrinkles on the film that covers the article. There is.

本発明の熱収縮性フィルムは、熱収縮性フィルムの前端部を物品に接着し、熱収縮性フィルムを物品に巻き付け、熱収縮性フィルムの後端部を接着し、熱収縮性フィルムを加熱して収縮させることによって、物品を被覆する熱収縮性フィルムにおいて、前端部および後端部には、光ラジカル重合開始剤を含有し、かつ９０℃における粘度が３０００ｍＰａ・ｓ以上である紫外線硬化型接着剤からなる接着部が形成されていることを特徴とする。
本発明のフィルム付き物品は、熱収縮性フィルムで被覆されたものであることを特徴とする。 The heat-shrinkable film of the present invention adheres the front end of the heat-shrinkable film to the article, winds the heat-shrinkable film around the article, adheres the rear end of the heat-shrinkable film, and heats the heat-shrinkable film. In the heat-shrinkable film covering the article, the front end portion and the rear end portion contain a radical photopolymerization initiator and have a viscosity at 90 ° C. of 3000 mPa · s or more. An adhesive portion made of an agent is formed.
The article with a film of the present invention is characterized by being coated with a heat-shrinkable film.

本発明の熱収縮性フィルムによれば、短時間で、確実に、かつムラおよびしわを生ずることなく物品を被覆できる。
本発明のフィルム付き物品は、物品を被覆するフィルムにムラおよびしわが少ない。 According to the heat-shrinkable film of the present invention, an article can be coated in a short time without fail and without causing unevenness and wrinkles.
The article with a film of the present invention has less unevenness and wrinkles on the film covering the article.

図１は、容器（物品）を熱収縮性フィルムで被覆する装置の一例を示す概略図である。該装置は、熱収縮性フィルム１０が巻かれたロール２１と、ロール２１から熱収縮性フィルム１０を送り出す駆動ローラ２２およびピンチローラ２３と、熱収縮性フィルム１０を切断するカッター２４と、切断された熱収縮性フィルム１０を保持する真空ドラム２５と、紫外線硬化型接着剤１１が入った接着剤容器２６と、接着剤容器２６の紫外線硬化型接着剤１１を熱収縮性フィルム１０に塗布し、熱収縮性フィルム１０の前端部１２および後端部１３に接着部１４を形成するアプリケータ２７と、真空ドラム２５に隣接して設けられ、回転軸２８を中心に回転することにより容器１５を位置（Ｉ）から位置（VI）まで移送するタレット２９と、熱収縮性フィルム１０を容器１５に巻き付ける際に熱収縮性フィルム１０を容器１５に押し付け、熱収縮性フィルム１０の後端部１３を、先端部１２を介して容器１５に押し付ける押圧部材３０と、熱収縮性フィルム１０の接着部１４に紫外線を照射する光源３２と、内部にて熱収縮性フィルム１０に熱風または蒸気を吹き付ける収縮トンネル３３とを具備して概略構成される。   FIG. 1 is a schematic view showing an example of an apparatus for coating a container (article) with a heat-shrinkable film. The apparatus is cut into a roll 21 around which the heat-shrinkable film 10 is wound, a driving roller 22 and a pinch roller 23 that feed the heat-shrinkable film 10 from the roll 21, and a cutter 24 that cuts the heat-shrinkable film 10. The vacuum drum 25 holding the heat-shrinkable film 10, the adhesive container 26 containing the UV-curable adhesive 11, and the UV-curable adhesive 11 in the adhesive container 26 are applied to the heat-shrinkable film 10, An applicator 27 that forms an adhesive portion 14 at the front end portion 12 and the rear end portion 13 of the heat-shrinkable film 10 and a vacuum drum 25 are provided adjacent to each other, and the container 15 is positioned by rotating around a rotating shaft 28. When the turret 29 to be transferred from (I) to the position (VI) and the heat-shrinkable film 10 are wound around the container 15, the heat-shrinkable film 10 is pressed against the container 15. The pressing member 30 that presses the rear end portion 13 of the heat-shrinkable film 10 against the container 15 through the front-end portion 12, the light source 32 that irradiates the adhesive portion 14 of the heat-shrinkable film 10 with ultraviolet light, A contracting tunnel 33 that blows hot air or steam on the shrinkable film 10 is schematically configured.

該装置を用いた容器１５の被覆は、以下のように行われる。
駆動ローラ２２およびピンチローラ２３によってロール２１から送り出された熱収縮性フィルム１０は、前端部１２が真空ドラム２５に保持されると同時に、カッター２４によって容器１５の外周と接着しろとの合計の長さに切断される。
切断された熱収縮性フィルム１０は、回転する真空ドラム２５に保持された状態で、真空ドラム２５に隣接して設けられたアプリケータ２７まで移送される。 The container 15 is coated using the apparatus as follows.
The heat-shrinkable film 10 sent out from the roll 21 by the drive roller 22 and the pinch roller 23 has the front end 12 held by the vacuum drum 25 and at the same time the total length of the outer periphery of the container 15 and the bonding margin by the cutter 24. It will be severed.
The cut heat-shrinkable film 10 is transferred to an applicator 27 provided adjacent to the vacuum drum 25 while being held by the rotating vacuum drum 25.

アプリケータ２７には、接着剤容器２６の紫外線硬化型接着剤１１が充填される溝が形成されており、アプリケータ２７が真空ドラム２５に連動して回転することにより、アプリケータ２７の溝の部分と接する熱収縮性フィルム１０の前端部１２および後端部１３に紫外線硬化型接着剤１１が塗布され、接着部１４が形成される。
接着部１４が形成された熱収縮性フィルム１０は、回転する真空ドラム２５に保持された状態で、真空ドラム２５に隣接して設けられたタレット２９まで移送される。 The applicator 27 is formed with a groove filled with the ultraviolet curable adhesive 11 of the adhesive container 26, and the applicator 27 rotates in conjunction with the vacuum drum 25. The ultraviolet curable adhesive 11 is applied to the front end portion 12 and the rear end portion 13 of the heat-shrinkable film 10 that is in contact with the portion, so that an adhesive portion 14 is formed.
The heat-shrinkable film 10 on which the bonding portion 14 is formed is transferred to a turret 29 provided adjacent to the vacuum drum 25 while being held by the rotating vacuum drum 25.

一方、位置（Ｉ）の容器供給部（図示略）にある容器１５は、真空ドラム２５に連動して回転するタレット２９に、位置（II）にて保持される。タレット２９に保持された容器１５は、それ自体が回転しながら位置（III)を通過する。
位置（IV）における真空ドラム２５とタレット２９との間隙は、真空ドラム２５と、タレット２９に保持された容器１５とが接する程度とされており、真空ドラム２５とタレット２９とが再接近する位置（IV）にて、図２に示すように、熱収縮性フィルム１０の前端部１２の接着部１４が容器１５の表面に接着される。 On the other hand, the container 15 in the container supply section (not shown) at the position (I) is held at the position (II) by the turret 29 that rotates in conjunction with the vacuum drum 25. The container 15 held by the turret 29 passes through the position (III) while rotating itself.
The gap between the vacuum drum 25 and the turret 29 at the position (IV) is such that the vacuum drum 25 and the container 15 held by the turret 29 are in contact with each other, and the position where the vacuum drum 25 and the turret 29 reapproach. In (IV), as shown in FIG. 2, the bonding portion 14 of the front end portion 12 of the heat-shrinkable film 10 is bonded to the surface of the container 15.

容器１５の表面に接着された熱収縮性フィルム１０は、容器１５の回転によって容器１５の外周に巻き付けられる。この際、タレット２９に保持された容器１５に接する程度に離間して設けられた、例えば板状、ブラシ状等の押圧部材３０によって、熱収縮性フィルム１０が容器１５に押し付けられることにより、シワ等が発生しないように、熱収縮性フィルム１０が容器１５の外周に巻き付けられる。   The heat-shrinkable film 10 adhered to the surface of the container 15 is wound around the outer periphery of the container 15 by the rotation of the container 15. At this time, the heat-shrinkable film 10 is pressed against the container 15 by a pressing member 30 such as a plate shape or a brush shape provided so as to be in contact with the container 15 held by the turret 29. The heat-shrinkable film 10 is wound around the outer periphery of the container 15 so as not to occur.

容器１５が１回転すると、熱収縮性フィルム１０の後端部１３の接着部１４が前端部１２の背面に、押圧部材３０によって後端部１３が先端部１２を介して容器１５に押し付けられることにより、しわ等が発生しないように接着される。位置（Ｖ）においては、図３に示すように、容器１５は、円筒状の熱収縮性フィルム１０で囲まれる。
なお、後端部１３の接着部１４は、前端部１２を除く熱収縮性フィルム１０に接着してもよく、容器１５の表面に接着してもよいが、通常は、前端部１２の背面に接着する。
熱収縮性フィルム１０で被覆された容器１５は、タレット２９から外れ、位置（VI）へ送り出される。 When the container 15 rotates once, the adhesive portion 14 of the rear end portion 13 of the heat-shrinkable film 10 is pressed against the back surface of the front end portion 12, and the rear end portion 13 is pressed against the container 15 via the front end portion 12 by the pressing member 30. Therefore, it is bonded so that wrinkles and the like do not occur. In the position (V), as shown in FIG. 3, the container 15 is surrounded by a cylindrical heat-shrinkable film 10.
In addition, although the adhesion part 14 of the rear-end part 13 may adhere | attach to the heat-shrinkable film 10 except the front-end part 12, you may adhere to the surface of the container 15, Usually, it is on the back surface of the front-end part 12. Glue.
The container 15 covered with the heat-shrinkable film 10 is detached from the turret 29 and sent out to the position (VI).

位置（VI）にて、熱収縮性フィルム１０の後端部１３と前端部１２とが重なった部分に光源３２から紫外線を照射し、接着部１４を硬化させる。これにより、熱収縮性フィルム１０の前端部１２と容器１５との完全な接着、および熱収縮性フィルム１０の後端部１３と前端部１２との完全な接着が、１回の紫外線照射で完了する。
収縮トンネル３３内に移送された容器１５に、熱風または蒸気を吹き付け、熱収縮性フィルム１０を加熱して、熱収縮性フィルム１０を容器１５の大きさ、形状に合わせて収縮させる。 At position (VI), the portion where the rear end portion 13 and the front end portion 12 of the heat-shrinkable film 10 overlap each other is irradiated with ultraviolet rays from the light source 32 to cure the adhesive portion 14. Thereby, complete adhesion between the front end portion 12 of the heat-shrinkable film 10 and the container 15 and complete adhesion between the rear end portion 13 and the front end portion 12 of the heat-shrinkable film 10 are completed by one UV irradiation. To do.
Hot air or steam is blown onto the container 15 transferred into the shrink tunnel 33 to heat the heat-shrinkable film 10 and shrink the heat-shrinkable film 10 in accordance with the size and shape of the container 15.

図４は、容器１５に巻き付ける直前の熱収縮性フィルム１０を示す正面図であり、前端部１２には、容器１５と接する２箇所に紫外線硬化型接着剤１１からなる接着部１４が形成され、後端部１３には、熱収縮性フィルム１０の幅方向に延びる、紫外線硬化型接着剤１１からなる帯状の接着部１４が形成されており、前端部１２および後端部１３を除く部分には接着部は形成されていない。
なお、前端部１２の接着部１４の形状、数等は、容器の形状に応じて適宜決定すればよく、例えば、図５に示すように、熱収縮性フィルム１０の幅方向に延びる帯状の接着部１４を形成してもよく、図６に示すように、熱収縮性フィルム１０の幅方向に一列に並んだ複数のドット状の接着部１４を形成してもよい。
接着部１４の膜厚は、１０〜５０μｍが好ましい。接着部１４の膜厚を１０μｍ以上とすることにより、充分な接着力が得られる。。接着部１４の膜厚を５０μｍ以下とすることにより、熱収縮性フィルム１０がしわになることがなく、ムラなく収縮できる。 FIG. 4 is a front view showing the heat-shrinkable film 10 immediately before being wound around the container 15, and the front end portion 12 is formed with an adhesive portion 14 made of the ultraviolet curable adhesive 11 at two locations in contact with the container 15. The rear end portion 13 is formed with a band-shaped adhesive portion 14 made of an ultraviolet curable adhesive 11 that extends in the width direction of the heat-shrinkable film 10, and a portion excluding the front end portion 12 and the rear end portion 13 is formed on the rear end portion 13. The adhesive part is not formed.
Note that the shape, number, and the like of the bonding portion 14 of the front end portion 12 may be appropriately determined according to the shape of the container. For example, as shown in FIG. 5, the band-shaped bonding extending in the width direction of the heat-shrinkable film 10. The part 14 may be formed, and as shown in FIG. 6, a plurality of dot-shaped adhesive parts 14 arranged in a line in the width direction of the heat-shrinkable film 10 may be formed.
As for the film thickness of the adhesion part 14, 10-50 micrometers is preferable. By setting the film thickness of the bonding portion 14 to 10 μm or more, sufficient adhesive force can be obtained. . By making the film thickness of the adhesive part 14 50 μm or less, the heat-shrinkable film 10 does not wrinkle and can be contracted without unevenness.

熱収縮性フィルム１０の材質としては、例えば、ポリオレフィン系樹脂、ポリスチレン系樹脂、ポリエステル系樹脂等が挙げられる。
熱収縮性フィルム１０としては、ロール２１の長さ方向に一軸延伸されたフィルム、ロール２１の長さ方向および該方向に直交する方向に延伸されたフィルム等が挙げられる。ロール２１の長さ方向の延伸倍率は、１．５〜１０倍が好ましく、２〜５倍がより好ましい。
熱収縮性フィルム１０の表面には、必要に応じてコロナ処理等の粗面化処理が施されていてもよい。また、熱収縮性フィルム１０は、単層フィルムであってもよく、共押出、ラミネート等による２層以上の多層フィルムであってもよい。また、熱収縮性フィルム１０には、内容物名、商品名、図柄等が印刷されていてもよい。 Examples of the material of the heat-shrinkable film 10 include polyolefin resins, polystyrene resins, polyester resins, and the like.
Examples of the heat-shrinkable film 10 include a film uniaxially stretched in the length direction of the roll 21 and a film stretched in the length direction of the roll 21 and in a direction perpendicular to the direction. The stretch ratio in the length direction of the roll 21 is preferably 1.5 to 10 times, and more preferably 2 to 5 times.
The surface of the heat-shrinkable film 10 may be subjected to roughening treatment such as corona treatment as necessary. The heat-shrinkable film 10 may be a single layer film or a multilayer film having two or more layers by coextrusion, lamination, or the like. The heat shrinkable film 10 may be printed with a content name, a product name, a design, and the like.

紫外線硬化型接着剤１１は、光開始剤を必須とし、必要に応じて、ラジカル重合性モノマーまたはオリゴマー、樹脂等を含有する。
光開始剤としては、光ラジカル重合開始剤を用いる。「光ラジカル重合開始剤」とは、紫外線の照射によってラジカルを発生する化合物である。光ラジカル重合開始剤を用いることにより、紫外線照射によって紫外線硬化型接着剤が瞬時に硬化するため、紫外線照射後にただちに熱収縮性フィルム１０の熱収縮を実施でき、時間短縮につながる。
なお、光開始剤としては光カチオン重合開始剤が知られているが、光カチオン重合開始剤では、紫外線硬化型接着剤の暗反応を含めた完全硬化に時間がかかるため、紫外線照射後にただちに熱収縮性フィルム１０の熱収縮を実施できないこともある。 The ultraviolet curable adhesive 11 essentially includes a photoinitiator, and contains a radical polymerizable monomer or oligomer, a resin, or the like as necessary.
As the photoinitiator, a photoradical polymerization initiator is used. The “photo radical polymerization initiator” is a compound that generates radicals upon irradiation with ultraviolet rays. By using the photo radical polymerization initiator, the ultraviolet curable adhesive is instantly cured by the ultraviolet irradiation, so that the heat shrinkable film 10 can be subjected to the thermal contraction immediately after the ultraviolet irradiation, leading to a reduction in time.
As the photoinitiator, a photocationic polymerization initiator is known. However, with a photocationic polymerization initiator, it takes time for complete curing including the dark reaction of the UV curable adhesive, so that it is immediately heated after UV irradiation. In some cases, the shrinkable film 10 cannot be thermally contracted.

光ラジカル重合開始剤としては、ベンジルジメチルケタール、イソプロピルチオキサントン、ビス（２，６−ジメトキシベンゾイル）（２，４，４−トリメチルペンチル）ホスフィンオキシド、２−ヒドロキシ−２−メチル−１−フェニル−１−プロパノン、ジフェニル（２，４，６−トリメチルベンゾイル）ホスフィンオキシド、１−ヒドロキシシクロヘキシルフェニルケトン、２−ベンジル−２−（ジメチルアミノ）−１−４−（４−モルホリニル）フェニル−１−ブタノン、α，α−ジメトキシ−α−フェニルアセトフェノン、２，２−ジエトキシアセトフェノン、２−メチル−１−４−（メチルチオ）フェニル−２−（４−モルホリニル）−１−プロパノン、２−ヒドロキシ−１−４−（ヒドロキシエトキシ）フェニル−２−メチル−１−プロパノン等が挙げられる。   As radical photopolymerization initiators, benzyldimethyl ketal, isopropylthioxanthone, bis (2,6-dimethoxybenzoyl) (2,4,4-trimethylpentyl) phosphine oxide, 2-hydroxy-2-methyl-1-phenyl-1 -Propanone, diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide, 1-hydroxycyclohexyl phenyl ketone, 2-benzyl-2- (dimethylamino) -1--4- (4-morpholinyl) phenyl-1-butanone, α, α-dimethoxy-α-phenylacetophenone, 2,2-diethoxyacetophenone, 2-methyl-1--4- (methylthio) phenyl-2- (4-morpholinyl) -1-propanone, 2-hydroxy-1- 4- (Hydroxyethoxy) phenyl-2-methyl- - propanone and the like.

ラジカル重合性モノマーとしては、２−ヒドロキシ−３−フェノキシプロピルアクリレート、ヘキシルアクリレート、２−エチルヘキシルアクリレート、イソボルニルアクリレート、イソオクチルアクリレート等のアクリル酸エステル；スチレン等の芳香族系モノマー；１，６−ヘキサンジオールジアクリレート、ネオペンチルグリコールジアクリレート、トリメチロールプロパントリアクリレート、ジペンタエリスリトールヘキサアクリレート等の多官能モノマー等が挙げられる。
ラジカル重合性オリゴマーとしては、ウレタンアクリレートオリゴマー、ポリエステルアクリレートオリゴマー、エポキシアクリレートオリゴマー、アクリル樹脂アクリレート等が挙げられる。 Examples of the radical polymerizable monomer include acrylic acid esters such as 2-hydroxy-3-phenoxypropyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, isobornyl acrylate, and isooctyl acrylate; aromatic monomers such as styrene; 1,6 -Polyfunctional monomers such as hexanediol diacrylate, neopentyl glycol diacrylate, trimethylolpropane triacrylate, and dipentaerythritol hexaacrylate.
Examples of the radical polymerizable oligomer include urethane acrylate oligomer, polyester acrylate oligomer, epoxy acrylate oligomer, acrylic resin acrylate and the like.

樹脂としては、アクリル樹脂、エポキシ樹脂、脂肪族系炭化水素樹脂、芳香族系炭化水素樹脂、ポリエステル樹脂、ビニル樹脂、ポリアミド樹脂、ポリウレタン樹脂、ゴム等が挙げられる。樹脂は、その末端や側鎖に炭素−炭素二重結合等の官能基を有する変性樹脂であってもよい。   Examples of the resin include acrylic resin, epoxy resin, aliphatic hydrocarbon resin, aromatic hydrocarbon resin, polyester resin, vinyl resin, polyamide resin, polyurethane resin, and rubber. The resin may be a modified resin having a functional group such as a carbon-carbon double bond at its terminal or side chain.

紫外線硬化型接着剤１１の粘度は、９０℃において３０００ｍＰａ・ｓ以上であり、 ３０００〜５００００ｍＰａ・ｓが好ましい。９０℃における粘度を３０００ｍＰａ・ｓ以上とすることにより、熱収縮性フィルム１０に塗布する際の紫外線硬化型接着剤１１の温度（以下、適用温度と記す。）においても充分なタック性を有することになり、熱収縮性フィルム１０を容器１５に巻き付ける際に熱収縮性フィルム１０の前端部１２が容器１５から外れてしまうことがない。９０℃における粘度を５００００ｍＰａ・ｓ以下とすることにより、熱収縮性フィルム１０に紫外線硬化型接着剤１１を塗布する際の塗布性が良好になる。粘度は、市販のＥ型粘度計を用いて９０℃にて測定される粘度である。   The viscosity of the ultraviolet curable adhesive 11 is 3000 mPa · s or more at 90 ° C., and preferably 3000 to 50000 mPa · s. By having a viscosity at 90 ° C. of 3000 mPa · s or more, it has sufficient tackiness even at the temperature of the ultraviolet curable adhesive 11 when applied to the heat-shrinkable film 10 (hereinafter referred to as application temperature). Thus, when the heat-shrinkable film 10 is wound around the container 15, the front end portion 12 of the heat-shrinkable film 10 is not detached from the container 15. By setting the viscosity at 90 ° C. to 50000 mPa · s or less, the coating property when the ultraviolet curable adhesive 11 is applied to the heat-shrinkable film 10 is improved. The viscosity is a viscosity measured at 90 ° C. using a commercially available E-type viscometer.

適用温度は、９０℃以下が好ましく、７０〜８０℃がより好ましい。適用温度を９０℃以下にすることにより、熱重合による紫外線硬化型接着剤１１の硬化が抑えられる。適用温度を７０℃以上にすることにより、熱収縮性フィルム１０に紫外線硬化型接着剤１１を塗布する際の塗布性が良好になる。   The application temperature is preferably 90 ° C. or lower, and more preferably 70 to 80 ° C. By setting the application temperature to 90 ° C. or lower, curing of the ultraviolet curable adhesive 11 by thermal polymerization can be suppressed. By setting the application temperature to 70 ° C. or higher, the applicability when the ultraviolet curable adhesive 11 is applied to the heat-shrinkable film 10 is improved.

熱収縮性フィルム１０の前端部１２の接着部１４を容器１５に接着する際の温度は、前記適用温度より低い温度が好ましい。適用温度より低い温度とすることにより、紫外線硬化型接着剤１１の粘度が高くなってタック性が向上し、熱収縮性フィルム１０の前端部１２と容器１５とが充分な接着力で接着される。   The temperature at which the adhesive portion 14 of the front end portion 12 of the heat-shrinkable film 10 is adhered to the container 15 is preferably lower than the application temperature. By setting the temperature lower than the application temperature, the viscosity of the ultraviolet curable adhesive 11 is increased, the tackiness is improved, and the front end portion 12 of the heat-shrinkable film 10 and the container 15 are bonded with sufficient adhesive force. .

光源３２としては、高圧水銀ランプ、メタルハライドランプ等が挙げられる。
光源３２からの紫外線照射量は、２００ｍＪ／ｃｍ2 以上が好ましい。
収縮トンネル３３からの熱風の温度は、８０〜１７０℃が好ましく、蒸気の温度は、７０〜１００℃が好ましい。 Examples of the light source 32 include a high-pressure mercury lamp and a metal halide lamp.
The amount of ultraviolet irradiation from the light source 32 is preferably 200 mJ / cm 2 or more.
The temperature of the hot air from the shrink tunnel 33 is preferably 80 to 170 ° C, and the temperature of the steam is preferably 70 to 100 ° C.

容器１５としては、ガラスボトル、ポリエチレンテレフタレート（ＰＥＴ）ボトル等のプラスチックボトル、アルミニウムボトル等の金属ボトル等が挙げられる。容器１５の形状としては、略筒状、角柱状、ひょうたん状等が挙げられる。熱収縮性フィルム１０は、接着部１４の接着力が高いため、図２に示すような、上部と底部が大径部、中央部が小径部とされたひょうたん状の容器１５のように、熱収縮性フィルム１０と容器１５とが接する部分が少ない容器に好適である。   Examples of the container 15 include glass bottles, plastic bottles such as polyethylene terephthalate (PET) bottles, and metal bottles such as aluminum bottles. Examples of the shape of the container 15 include a substantially cylindrical shape, a prismatic shape, and a gourd shape. Since the heat-shrinkable film 10 has a high adhesive force at the adhesive portion 14, as shown in FIG. 2, the heat-shrinkable film 10 is heated like a gourd-like container 15 having a large diameter portion at the top and bottom and a small diameter portion at the center. It is suitable for a container having few portions where the shrinkable film 10 and the container 15 are in contact.

以上説明した熱収縮性フィルム１０にあっては、熱収縮性フィルム１０の前端部１２および後端部１３に紫外線硬化型接着剤１１からなる接着部１４が形成されているため、巻き付け法を採用することができ、その結果、短時間で容器１５を被覆できる。
また、紫外線硬化型接着剤１１が、９０℃における粘度が３０００ｍＰａ・ｓ以上であるため、熱収縮性フィルム１０を容器１５に巻き付ける際に、熱収縮性フィルム１０の前端部１２が容器１５から外れてしまうことがなく、安定して確実に容器１５を被覆できる。また、熱収縮性フィルム１０を容器１５に巻き付ける前に、接着部１４を加熱する必要がないため、ムラおよびしわを生ずることなく容器１５を被覆できる。 In the heat-shrinkable film 10 described above, the adhesive portion 14 made of the ultraviolet curable adhesive 11 is formed on the front end portion 12 and the rear end portion 13 of the heat-shrinkable film 10, and therefore a winding method is adopted. As a result, the container 15 can be covered in a short time.
Further, since the ultraviolet curable adhesive 11 has a viscosity at 90 ° C. of 3000 mPa · s or more, the front end portion 12 of the heat-shrinkable film 10 is detached from the container 15 when the heat-shrinkable film 10 is wound around the container 15. The container 15 can be covered stably and reliably. Moreover, since it is not necessary to heat the adhesion part 14 before winding the heat-shrinkable film 10 around the container 15, the container 15 can be covered without causing unevenness and wrinkles.

また、紫外線硬化型接着剤１１が、光ラジカル重合開始剤を含有しているため、紫外線照射によって紫外線硬化型接着剤１１が瞬時に硬化する。その結果、紫外線照射後にただちに熱収縮性フィルム１０の熱収縮を実施でき、短時間で容器１５を被覆できる。
また、熱収縮性フィルム１０の前端部１２が容器１５から外れてしまうことがないため、熱収縮性フィルム１０の前端部１２と容器１５との完全な接着、および熱収縮性フィルム１０の後端部１３と前端部１２との完全な接着が、１回の紫外線照射で完了する。すなわち、熱収縮性フィルム１０を容器１５に巻き付ける前に、熱収縮性フィルム１０の前端部１２の紫外線硬化型接着剤１１を硬化させ、熱収縮性フィルム１０の前端部１１を容器１５に充分に接着させる必要がないため、短時間で容器１５を被覆できる。 Moreover, since the ultraviolet curable adhesive 11 contains a radical photopolymerization initiator, the ultraviolet curable adhesive 11 is instantaneously cured by ultraviolet irradiation. As a result, the heat-shrinkable film 10 can be heat-shrinked immediately after the ultraviolet irradiation, and the container 15 can be covered in a short time.
Further, since the front end portion 12 of the heat-shrinkable film 10 is not detached from the container 15, complete adhesion between the front end portion 12 of the heat-shrinkable film 10 and the container 15 and the rear end of the heat-shrinkable film 10 are achieved. Complete adhesion between the portion 13 and the front end portion 12 is completed by one UV irradiation. That is, before the heat-shrinkable film 10 is wound around the container 15, the ultraviolet curable adhesive 11 at the front end portion 12 of the heat-shrinkable film 10 is cured, and the front end portion 11 of the heat-shrinkable film 10 is sufficiently attached to the container 15. Since it is not necessary to adhere, the container 15 can be covered in a short time.

なお、本発明の熱収縮性フィルムの被覆対象は、図示例のような容器に限定はされない。本発明の熱収縮性フィルムは、例えば、乾電池等、熱収縮性フィルムからなるラベル、包装等を取り付ける物品に適用できる。
そして、本発明のフィルム付き物品は、本発明の熱収縮性フィルムで被覆されているため、物品を被覆するフィルムにムラおよびしわが少ない。 In addition, the coating target of the heat-shrinkable film of the present invention is not limited to a container as shown in the illustrated example. The heat-shrinkable film of the present invention can be applied to an article to which a label made of a heat-shrinkable film, packaging or the like is attached, such as a dry battery.
And since the articles | goods with a film of this invention are coat | covered with the heat-shrinkable film of this invention, there are few nonuniformity and a wrinkle in the film which coat | covers articles | goods.

〔調製例１〕
変性アクリル樹脂（三菱レイヨン社製、ダイヤナールＢＲ−１０５）３５質量部、変性アクリル樹脂（三菱レイヨン社製、ダイヤナールＢＲ−１０１）１５質量部、２−ヒドロキシ−３−フェノキシプロピルアクリレート３５質量部、トリプロピレングリコールジアクリレート１５質量部、ＤＡＲＯＣＵＲ１１７３（チバ・スペシャリティ・ケミカルズ社製、２−ヒドロキシ−２−メチル−１−フェニル−プロパン−１−オン）３質量部、ＩＲＧＡＣＵＲＥ１８４（チバ・スペシャリティ・ケミカルズ社製、１−ヒドロキシ−シクロヘキシルフェニルケトン）３質量部を混合し、紫外線硬化型接着剤（１）を調製した。Ｅ型粘度計（トキメック社製）を用いて、各温度における粘度を測定した。結果を表１に示す。 [Preparation Example 1]
35 parts by mass of modified acrylic resin (Mitsubishi Rayon, Dainal BR-105), 15 parts by mass of modified acrylic resin (Mitsubishi Rayon, Dainal BR-101), 35 parts by mass of 2-hydroxy-3-phenoxypropyl acrylate , 15 parts by mass of tripropylene glycol diacrylate, 3 parts by mass of DAROCUR 1173 (manufactured by Ciba Specialty Chemicals, 2-hydroxy-2-methyl-1-phenyl-propan-1-one), IRGACURE 184 (Ciba Specialty Chemicals) 3 parts by mass of 1-hydroxy-cyclohexylphenylketone) was mixed to prepare an ultraviolet curable adhesive (1). Using an E-type viscometer (manufactured by Tokimec), the viscosity at each temperature was measured. The results are shown in Table 1.

〔調製例２〕
変性アクリル樹脂（三菱レイヨン社製、ダイヤナールＢＲ−１０５）１９質量部、変性アクリル樹脂（三菱レイヨン社製、ダイヤナールＢＲ−１０１）８質量部、２−ヒドロキシ−３−フェノキシプロピルアクリレート５８質量部、トリプロピレングリコールジアクリレート１５質量部、ＤＡＲＯＣＵＲ１１７３（チバ・スペシャリティ・ケミカルズ社製、２−ヒドロキシ−２−メチル−１−フェニル−プロパン−１−オン）３質量部、ＩＲＧＡＣＵＲＥ１８４（チバ・スペシャリティ・ケミカルズ社製、１−ヒドロキシ−シクロヘキシルフェニルケトン）３質量部を混合し、紫外線硬化型接着剤（２）を調製した。調製例１と同様にして、各温度における粘度を測定した。結果を表１に示す。 [Preparation Example 2]
19 parts by mass of modified acrylic resin (Mitsubishi Rayon, Dianal BR-105), 8 parts by mass of modified acrylic resin (Mitsubishi Rayon, Dainal BR-101), 58 parts by mass of 2-hydroxy-3-phenoxypropyl acrylate , 15 parts by mass of tripropylene glycol diacrylate, 3 parts by mass of DAROCUR 1173 (manufactured by Ciba Specialty Chemicals, 2-hydroxy-2-methyl-1-phenyl-propan-1-one), IRGACURE 184 (Ciba Specialty Chemicals) 3 parts by mass of 1-hydroxy-cyclohexylphenylketone) was mixed to prepare an ultraviolet curable adhesive (2). In the same manner as in Preparation Example 1, the viscosity at each temperature was measured. The results are shown in Table 1.

〔調製例３〕
エポキシ樹脂（ユニオンカーバイド社製、ＣＹＲＡＣＵＲＥ ＵＶＲ−６１１０）２５質量部、カプロラクトントリオール（ユニオンカーバイド社製、ＴＯＮＥ Ｐｏｌｙｏｌ ０３０５）５質量部、芳香族ポリエステルポリオール（Ｓｔｅｐａｎ社製、ＳＴＥＰＡＮＰＯＬ ＰＨ−５６）６８質量部、光カチオン重合開始剤（ユニオンカーバイド社製、ＣＹＲＡＣＵＲＥ ＵＶＩ−６９７６）２質量部を混合し、紫外線硬化型接着剤（３）を調製した。調製例１と同様にして、各温度における粘度を測定した。結果を表１に示す。 [Preparation Example 3]
25 parts by mass of an epoxy resin (manufactured by Union Carbide, CYRACURE UVR-6110), 5 parts by mass of caprolactone triol (manufactured by Union Carbide, TONE Polyol 0305), 68 parts by mass of an aromatic polyester polyol (manufactured by Stepan, STEPPANPOL PH-56) 2 parts by weight of a cationic photopolymerization initiator (Union Carbide, CYRACURE UVI-6976) was mixed to prepare an ultraviolet curable adhesive (3). In the same manner as in Preparation Example 1, the viscosity at each temperature was measured. The results are shown in Table 1.

Figure 2007308164
Figure 2007308164

〔製造例１〕
テレフタル酸５０モル％とエチレングリコール５０モル％とからなる、極限粘度０．８０ｄＬ／ｇの共重合ポリエステル樹脂９５質量部と、シリカ粒子５質量部とを溶融押出したコンパウンド樹脂を調製した。
該コンパウンド樹脂３２質量部と、テレフタル酸５０モル％とエチレングリコール３２５モル％とシクロヘキサンジメタノール１７．５モル％とからなる、極限粘度０．７８ｄＬ／ｇの共重合ポリエステル樹脂６８質量部とをブレンダーに投入して撹拌混合した後、真空ベント式二軸押出機に供給し、２７０℃で溶融させた。溶融樹脂をＴダイから、ロール内部に８５℃の温水を循環させたキャストロール上に押出し、厚さ１００μｍのフィルムを成形した。ついで、このフィルムを１１０℃の温度でロール式縦延伸機を用いてフィルム走行方向（縦方向）に２倍に延伸し、その後、１０５℃で熱処理して厚さ５０μｍの熱収縮性フィルムを得た。
得られた熱収縮性フィルムを１００℃の温水中に１０秒間浸漬して測定した縦方向の熱収縮率は４９％であり、フィルム方向と直交する方向（横方向）の熱収縮率は２％であった。 [Production Example 1]
A compound resin prepared by melt-extruding 95 parts by mass of a copolyester resin having an intrinsic viscosity of 0.80 dL / g and 50 parts by mass of silica particles, comprising 50 mol% of terephthalic acid and 50 mol% of ethylene glycol was prepared.
Blender comprising 32 parts by mass of the compound resin, 68 parts by mass of a copolyester resin having an intrinsic viscosity of 0.78 dL / g, comprising 50 mol% of terephthalic acid, 325 mol% of ethylene glycol, and 17.5 mol% of cyclohexanedimethanol After stirring and mixing, the mixture was supplied to a vacuum vent type twin screw extruder and melted at 270 ° C. The molten resin was extruded from a T die onto a cast roll in which hot water at 85 ° C. was circulated inside the roll to form a film having a thickness of 100 μm. Next, this film was stretched twice in the film running direction (longitudinal direction) using a roll type longitudinal stretching machine at a temperature of 110 ° C., and then heat treated at 105 ° C. to obtain a heat-shrinkable film having a thickness of 50 μm. It was.
The heat shrinkage rate in the longitudinal direction measured by immersing the obtained heat shrinkable film in warm water at 100 ° C. for 10 seconds is 49%, and the heat shrinkage rate in the direction orthogonal to the film direction (lateral direction) is 2%. Met.

〔製造例２〕
ブタジエン単位含有量が２０質量％のスチレン−ブタジエン−スチレン型ブロック共重合体樹脂（電気化学工業（株）製、クリアレン８５０Ｌ）を、２００℃に設定した単軸押出機に供給し、溶融樹脂をＴダイから、ロール内部に９６℃の温水を循環させたキャストロール上に押出し、厚さ１００μｍのフィルムを成形した。ついで、このフィルムを１１０℃の温度でロール式縦延伸機を用いて縦方向に３倍に延伸し、その後、１０５℃で熱処理して厚さ４５μｍの熱収縮性フィルムを得た。
得られた熱収縮性フィルムを１００℃の温水中に１０秒間浸漬して測定した縦方向の熱収縮率は６５％であり、横方向の熱収縮率は４％であった。 [Production Example 2]
A styrene-butadiene-styrene block copolymer resin having a butadiene unit content of 20% by mass (manufactured by Denki Kagaku Kogyo Co., Ltd., Clearen 850 L) is supplied to a single screw extruder set at 200 ° C., and the molten resin is supplied. The film was extruded from a T-die onto a cast roll in which hot water of 96 ° C. was circulated inside the roll to form a film having a thickness of 100 μm. Subsequently, this film was stretched 3 times in the machine direction at a temperature of 110 ° C. using a roll type longitudinal stretch machine, and then heat treated at 105 ° C. to obtain a heat-shrinkable film having a thickness of 45 μm.
The obtained heat-shrinkable film was immersed in warm water at 100 ° C. for 10 seconds, and the heat shrinkage rate in the vertical direction was 65%, and the heat shrinkage rate in the horizontal direction was 4%.

〔製造例３〕
下記中間層用樹脂、および下記両表層用樹脂を、それぞれ別の押出機に投入し、３層となるように２３０℃のＴダイから押出し、４０℃のキャストロールで冷却し、厚さ１５０μｍのフィルムを成形した。
中間層用樹脂：プロピレン−α−オレフィンランダム共重合体（日本ポリプロ（株）製、ウィンテックＷＦＸ６）６５質量％と、エチレン−α−オレフィンランダム共重合体（住友化学工業（株）社製、ノーブレンＳ−１３１）１５質量％と、石油樹脂（荒川化学工業（株）製、アルコンＰ−１４０）２０質量部の混合物。
両表層用樹脂：プロピレン−α−オレフィンランダム共重合体（日本ポリプロ（株）製、ウィンテックＷＦ４Ｔ）。
ついで、このフィルムを１２０℃の温度でロール式縦延伸機を用いて縦方向に３倍に延伸し、その後、１０５℃で熱処理して厚さ５０μｍの熱収縮性フィルムを得た。
得られた熱収縮性フィルムを１００℃の温水中に１０秒間浸漬して測定した縦方向の熱収縮率は６５％であり、横方向の熱収縮率は４％であった。 [Production Example 3]
The following intermediate layer resin and the following both surface layer resins are put into separate extruders, extruded from a 230 ° C. T-die to form three layers, cooled with a 40 ° C. cast roll, and a thickness of 150 μm. A film was formed.
Intermediate layer resin: 65% by mass of propylene-α-olefin random copolymer (manufactured by Nippon Polypro Co., Ltd., Wintech WFX6) and ethylene-α-olefin random copolymer (manufactured by Sumitomo Chemical Co., Ltd.) Noblene S-131) 15% by mass and petroleum resin (Arakawa Chemical Industries, Ltd., Alcon P-140) 20 parts by mass.
Resin for both surface layers: Propylene-α-olefin random copolymer (manufactured by Nippon Polypro Co., Ltd., Wintech WF4T).
Subsequently, this film was stretched 3 times in the machine direction at a temperature of 120 ° C. using a roll type longitudinal stretch machine, and then heat treated at 105 ° C. to obtain a heat-shrinkable film having a thickness of 50 μm.
The obtained heat-shrinkable film was immersed in warm water at 100 ° C. for 10 seconds, and the heat shrinkage rate in the vertical direction was 65%, and the heat shrinkage rate in the horizontal direction was 4%.

〔実施例１〕
図１に示す装置を用い、紫外線硬化型接着剤の適用温度を９０℃、光源からの紫外線照射量を３００ｍＪ／ｃｍ2 、収縮トンネル内の蒸気温度を８０〜９５℃に段階的に高くなるように設定して、容器を熱収縮性フィルムで被覆した。光源としては、水銀ランプを用いた。また、接着部の膜厚が２０μｍとなるように、アプリケータを調整した。
熱収縮性フィルムとしては、ポリエステル系樹脂製の熱収縮性フィルム（製造例１）を用い、紫外線硬化型接着剤としては、調製例１の紫外線硬化型接着剤（１）を用い、容器としては、図２に示すひょうたん状のボトルを用いた。 [Example 1]
Using the apparatus shown in FIG. 1, the application temperature of the UV curable adhesive is 90 ° C., the UV irradiation amount from the light source is 300 mJ / cm 2 , and the vapor temperature in the shrink tunnel is increased stepwise to 80 to 95 ° C. And the container was covered with a heat shrinkable film. A mercury lamp was used as the light source. Moreover, the applicator was adjusted so that the film thickness of an adhesion part might be 20 micrometers.
As the heat-shrinkable film, a heat-shrinkable film made of polyester resin (Production Example 1) is used. As the UV-curable adhesive, the UV-curable adhesive (1) of Preparation Example 1 is used. The gourd-shaped bottle shown in FIG. 2 was used.

熱収縮性フィルムを容器に巻き付ける際に、熱収縮性フィルムの前端部が容器から外れてしまうことがなく、安定して容器を被覆できた。熱収縮性フィルムで被覆された容器を観察したところ、熱収縮性フィルムにシワ等はなく、ムラなく被覆されてた。また、熱収縮性フィルムの後端部と前端部とが重なった部分、および容器の肩の部分（直径差の大きい、高収縮部）における紫外線硬化型接着剤の接着状態は良好であった。   When the heat-shrinkable film was wound around the container, the front end portion of the heat-shrinkable film was not detached from the container, and the container could be stably coated. When the container covered with the heat-shrinkable film was observed, the heat-shrinkable film was coated without any wrinkles or the like. Moreover, the adhesive state of the ultraviolet curable adhesive in the portion where the rear end portion and the front end portion of the heat-shrinkable film overlap each other and the shoulder portion of the container (the large shrinkage portion having a large diameter difference) was good.

〔実施例２〕
熱収縮性フィルムとして、ポリスチレン系樹脂製の熱収縮性フィルム（製造例２）を用いた以外は、実施例１と同様にして容器を熱収縮性フィルムで被覆した。
熱収縮性フィルムを容器に巻き付ける際に、熱収縮性フィルムの前端部が容器から外れてしまうことがなく、安定して容器を被覆できた。熱収縮性フィルムで被覆された容器を観察したところ、熱収縮性フィルムにシワ等はなく、ムラなく被覆されてた。また、熱収縮性フィルムの後端部と前端部とが重なった部分、および容器の肩の部分（直径差の大きい、高収縮部）における紫外線硬化型接着剤の接着状態は良好であった。 [Example 2]
The container was covered with a heat-shrinkable film in the same manner as in Example 1 except that a heat-shrinkable film made of polystyrene resin (Production Example 2) was used as the heat-shrinkable film.
When the heat-shrinkable film was wound around the container, the front end portion of the heat-shrinkable film was not detached from the container, and the container could be stably coated. When the container covered with the heat-shrinkable film was observed, the heat-shrinkable film was coated without any wrinkles or the like. Moreover, the adhesive state of the ultraviolet curable adhesive in the portion where the rear end portion and the front end portion of the heat-shrinkable film overlap each other and the shoulder portion of the container (the large shrinkage portion having a large diameter difference) was good.

〔実施例３〕
熱収縮性フィルムとして、ポリオレフィン系樹脂製の熱収縮性フィルム（製造例３）を用いた以外は、実施例１と同様にして容器を熱収縮性フィルムで被覆した。
熱収縮性フィルムを容器に巻き付ける際に、熱収縮性フィルムの前端部が容器から外れてしまうことがなく、安定して容器を被覆できた。熱収縮性フィルムで被覆された容器を観察したところ、熱収縮性フィルムにシワ等はなく、ムラなく被覆されてた。また、熱収縮性フィルムの後端部と前端部とが重なった部分、および容器の肩の部分（直径差の大きい、高収縮部）における紫外線硬化型接着剤の接着状態は良好であった。 Example 3
The container was covered with a heat-shrinkable film in the same manner as in Example 1 except that a polyolefin-based resin heat-shrinkable film (Production Example 3) was used as the heat-shrinkable film.
When the heat-shrinkable film was wound around the container, the front end portion of the heat-shrinkable film was not detached from the container, and the container could be stably coated. When the container covered with the heat-shrinkable film was observed, the heat-shrinkable film was coated without any wrinkles or the like. Moreover, the adhesive state of the ultraviolet curable adhesive in the portion where the rear end portion and the front end portion of the heat-shrinkable film overlap each other and the shoulder portion of the container (the large shrinkage portion having a large diameter difference) was good.

〔比較例１〕
紫外線硬化型接着剤として、調製例２の紫外線硬化型接着剤（２）を用いた以外は、実施例１と同様にして容器を熱収縮性フィルムで被覆した。
熱収縮性フィルムを容器に巻き付ける際に、熱収縮性フィルムの前端部が容器から外れてしまうことがあった（１００個中１０個で発生）。熱収縮性フィルムで被覆された容器を観察したところ、接着剤がはみ出していた。また、熱収縮性フィルムの後端部と前端部とが重なった部分、および容器の肩の部分（直径差の大きい、高収縮部）における紫外線硬化型接着剤の接着状態は悪く、ずれやしわが生じた。 [Comparative Example 1]
The container was covered with a heat-shrinkable film in the same manner as in Example 1 except that the ultraviolet curable adhesive (2) of Preparation Example 2 was used as the ultraviolet curable adhesive.
When the heat-shrinkable film is wound around the container, the front end portion of the heat-shrinkable film sometimes comes off from the container (occurrence of 10 out of 100). When the container covered with the heat-shrinkable film was observed, the adhesive protruded. In addition, the adhesive state of the UV curable adhesive at the part where the rear end part and the front end part of the heat shrinkable film overlap and the shoulder part of the container (large difference in diameter, high shrinkage part) is poor and misaligned. I was born.

〔比較例２〕
紫外線硬化型接着剤として、調製例３の紫外線硬化型接着剤（３）を用いた以外は、実施例１と同様にして容器を熱収縮性フィルムで被覆した。
熱収縮性フィルムを容器に巻き付ける際には、問題なく熱収縮性フィルムを固定できた。しかし、熱収縮性フィルムの後端部と前端部とが重なった部分、および容器の肩の部分（直径差の大きい、高収縮部）における紫外線硬化型接着剤の接着状態は悪く、ずれやしわが生じることがあった（１００個中１０個で発生）。 [Comparative Example 2]
The container was covered with a heat-shrinkable film in the same manner as in Example 1 except that the ultraviolet curable adhesive (3) of Preparation Example 3 was used as the ultraviolet curable adhesive.
When the heat-shrinkable film was wound around the container, the heat-shrinkable film could be fixed without any problem. However, the adhesive state of the UV curable adhesive at the part where the rear end part and the front end part of the heat-shrinkable film overlap and the shoulder part of the container (large difference in diameter, high shrinkage part) is poor and misaligned. Wrinkles sometimes occurred (occurred in 10 out of 100).

本発明の熱収縮性フィルムは、容器等の物品を短時間で、確実に、かつムラおよびしわを生ずることなく被覆するラベル等として有用である。   The heat-shrinkable film of the present invention is useful as a label or the like for covering an article such as a container in a short time, reliably and without causing unevenness and wrinkles.

物品を熱収縮性フィルムで被覆する装置の一例を示す概略図である。It is the schematic which shows an example of the apparatus which coat | covers articles | goods with a heat-shrinkable film. 熱収縮性フィルムの前端部を物品に接着した様子を示す正面図である。It is a front view which shows a mode that the front-end part of the heat-shrinkable film was adhere | attached on the articles | goods. 熱収縮性フィルムを物品に巻き付け、熱収縮性フィルムの後端部を前端部に接着した様子を示す正面図である。It is a front view which shows a mode that the heat-shrinkable film was wound around the articles | goods and the rear-end part of the heat-shrinkable film was adhere | attached on the front-end part. 本発明の熱収縮性フィルムの一例を示す正面図である。It is a front view which shows an example of the heat-shrinkable film of this invention. 本発明の熱収縮性フィルムの一例を示す正面図である。It is a front view which shows an example of the heat-shrinkable film of this invention. 本発明の熱収縮性フィルムの一例を示す正面図である。It is a front view which shows an example of the heat-shrinkable film of this invention.

符号の説明Explanation of symbols

１０ 熱収縮性フィルム
１１ 紫外線硬化型接着剤
１２ 前端部
１３ 後端部
１４ 接着部
１５ 容器（物品）
DESCRIPTION OF SYMBOLS 10 Heat-shrinkable film 11 UV curable adhesive 12 Front end part 13 Rear end part 14 Adhesive part 15 Container (article)

Claims (2)

熱収縮性フィルムの前端部を物品に接着し、熱収縮性フィルムを物品に巻き付け、熱収縮性フィルムの後端部を接着し、熱収縮性フィルムを加熱して収縮させることによって、物品を被覆する熱収縮性フィルムにおいて、
前端部および後端部には、光ラジカル重合開始剤を含有し、かつ９０℃における粘度が３０００ｍＰａ・ｓ以上である紫外線硬化型接着剤からなる接着部が形成されていることを特徴とする熱収縮性フィルム。 Cover the article by adhering the front end of the heat-shrinkable film to the article, wrapping the heat-shrinkable film around the article, adhering the rear end of the heat-shrinkable film, and heating and shrinking the heat-shrinkable film In heat shrinkable film,
The front end portion and the rear end portion are formed with an adhesive portion made of an ultraviolet curable adhesive containing a radical photopolymerization initiator and having a viscosity at 90 ° C. of 3000 mPa · s or more. Shrink film. 請求項１に記載の熱収縮性フィルムで被覆された、フィルム付き物品。
The article with a film coat | covered with the heat-shrinkable film of Claim 1.
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JP2010128038A (en) * 2008-11-26 2010-06-10 Toyobo Co Ltd Heat shrinkable label and method for manufacturing the same
JP2010128039A (en) * 2008-11-26 2010-06-10 Toyobo Co Ltd Heat shrinkable label and method for manufacturing the same
WO2012147951A1 (en) * 2011-04-27 2012-11-01 東洋インキＳｃホールディングス株式会社 Hot melt adhesive, adhesive film, coated article, and method for manufacturing coated article
JP2012236993A (en) * 2011-04-27 2012-12-06 Toyo Ink Sc Holdings Co Ltd Hot melt adhesive, adhesive film, coated article, and method for manufacturing coated article
WO2013014801A1 (en) * 2011-07-28 2013-01-31 東洋紡株式会社 Active energy ray curable adhesive composition, label and bottle
JP2015006911A (en) * 2013-06-26 2015-01-15 株式会社フジシールインターナショナル Package

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JPS60158028A (en) * 1984-01-17 1985-08-19 冨士シ−ル工業株式会社 Method and device for fitting label
JPH05262327A (en) * 1991-11-25 1993-10-12 Kotobuki Seihan Insatsu Kk Sticking of thermo-contracting plastic film
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Publication number Priority date Publication date Assignee Title
JP2010128038A (en) * 2008-11-26 2010-06-10 Toyobo Co Ltd Heat shrinkable label and method for manufacturing the same
JP2010128039A (en) * 2008-11-26 2010-06-10 Toyobo Co Ltd Heat shrinkable label and method for manufacturing the same
WO2012147951A1 (en) * 2011-04-27 2012-11-01 東洋インキＳｃホールディングス株式会社 Hot melt adhesive, adhesive film, coated article, and method for manufacturing coated article
JP2012236993A (en) * 2011-04-27 2012-12-06 Toyo Ink Sc Holdings Co Ltd Hot melt adhesive, adhesive film, coated article, and method for manufacturing coated article
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JP2015006911A (en) * 2013-06-26 2015-01-15 株式会社フジシールインターナショナル Package

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