JP4170868B2 - Method for producing thermal transfer image-receiving sheet - Google Patents
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- JP4170868B2 JP4170868B2 JP2003329006A JP2003329006A JP4170868B2 JP 4170868 B2 JP4170868 B2 JP 4170868B2 JP 2003329006 A JP2003329006 A JP 2003329006A JP 2003329006 A JP2003329006 A JP 2003329006A JP 4170868 B2 JP4170868 B2 JP 4170868B2
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Images
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
Description
本発明は、熱転写シートと重ね合わせ、サーマルヘッドやレーザー光をデバイスとして、昇華性染料の色材を熱転写することにより画像が形成される熱転写受像シートの製造方法に関し、詳細には熱転写方式で得られる印画物において、ハイライト部分、特にイエロー、マゼンタ、シアンの印字を重ねて、グレーの色相を有するハイライト部分が本来再現されるべき色相を有する優れた印字品質を有するものが得られる熱転写受像シートの製造方法に関する。 The present invention relates to a method for producing a thermal transfer image receiving sheet in which an image is formed by superimposing a thermal transfer sheet and thermally transferring a coloring material of a sublimation dye using a thermal head or laser light as a device. Thermal print image that has excellent print quality with a hue that should originally reproduce the highlight portion having a gray hue by overlaying the highlight portion, particularly yellow, magenta, and cyan prints. The present invention relates to a sheet manufacturing method.
従来から、熱転写方式を用いて被転写体に文字や画像を形成することが行われている。熱転写方式としては、感熱昇華型転写方式と感熱溶融型転写方式が広く用いられている。このうち、感熱昇華型転写方式は、昇華性染料を色材とし、それを画像情報に応じて発熱制御されたサーマルヘッドやレーザー光等の加熱デバイスを用いて、熱転写シート上の昇華性染料層中の染料を熱転写受像シート等の被転写体に移行させて画像を形成させる方式である。 Conventionally, characters and images are formed on a transfer medium using a thermal transfer method. As the thermal transfer method, a thermal sublimation transfer method and a thermal fusion transfer method are widely used. Of these, the heat-sensitive sublimation transfer method uses a sublimation dye as a color material, and uses a heating device such as a thermal head or laser light whose heat is controlled according to image information, and uses a sublimation dye layer on the thermal transfer sheet. In this method, an image is formed by transferring the dye inside to a transfer medium such as a thermal transfer image receiving sheet.
この感熱昇華型転写方式は、極めて短時間の加熱によってドット単位で染料の移行量を制御できる。このように形成された画像は、使用する色材が染料であることから非常に鮮明であり、且つ透明性に優れているため、得られる画像は中間調の再現性や階調性に優れ、極めて高精細な画像を得ることができる。このため、フルカラー銀塩写真に匹敵する高品質の画像を得ることができる。 This heat-sensitive sublimation transfer system can control the amount of dye transfer in dot units by heating for a very short time. The image formed in this way is very clear because the coloring material used is a dye and is excellent in transparency, so the resulting image is excellent in halftone reproducibility and gradation, An extremely high-definition image can be obtained. For this reason, a high quality image comparable to a full-color silver salt photograph can be obtained.
マルチメディアに関連した様々なハード及びソフトの発達により、この熱転写方式は、コンピューターグラフィックス、衛星通信による静止画像そしてＣＤＲＯＭその他に代表されるデジタル画像及びビデオ等のアナログ画像のフルカラーハードコピーシステムとして、その市場を拡大している。 With the development of various hardware and software related to multimedia, this thermal transfer system is a full-color hard copy system for analog images such as digital images and video such as still images by computer graphics, satellite communications, and CDROM and others. That market is expanding.
この熱転写方式による熱転写受像シートの具体的な用途は、多岐にわたっている。代表的なものとしては、印刷の校正刷り、画像の出力、ＣＡＤ／ＣＡＭなどの設計およびデザインなどの出力、ＣＴスキャンや内視鏡カメラなどの各種医療用分析機器、測定機器の出力用途そしてインスタント写真の代替として、また身分証明書やＩＤカード、クレジットカード、その他カード類への顔写真などの出力、さらに遊園地、ゲームセンター、博物館、水族館などのアミューズメント施設における合成写真、記念写真、絵ハガキとしての用途等をあげることができる。 The specific uses of the thermal transfer image receiving sheet by this thermal transfer method are various. Typical examples include printing proofs, image output, CAD / CAM design and design output, various medical analytical instruments such as CT scans and endoscopic cameras, measuring instrument output applications and instant As an alternative to photos, output of ID cards, ID cards, credit cards, other face photos to other cards, and composite photos, commemorative photos, and postcards at amusement facilities such as amusement parks, game centers, museums, and aquariums The use etc. can be mention | raise | lifted.
上記のような熱転写受像シートを製造する方法として、例えば、特許文献１にあるように受容層を形成する溶剤がメチルエチルケトンと、メチルエチルケトンより蒸発速度の小さい溶剤からなる塗布液で、メチルエチルケトンの方が含有量を大きくして、基材上に塗布し乾燥させる方法が記載されている。この方法により、受容層中の残留溶剤量を少量にすることができ、製造直後に印字した時の画像濃度を、保存後に印字した時の画像濃度との差を小さくし、印字画像の経時変化を防ぐものである。 As a method for producing the thermal transfer image-receiving sheet as described above, for example, as disclosed in Patent Document 1, a solvent for forming a receiving layer is a coating solution comprising methyl ethyl ketone and a solvent having a lower evaporation rate than methyl ethyl ketone, and methyl ethyl ketone is contained. A method is described in which the amount is increased and applied onto a substrate and dried. By this method, the amount of residual solvent in the receiving layer can be reduced, the difference between the image density when printed immediately after production and the image density when printed after storage is reduced, and the change in print image over time Is to prevent.
また、熱転写受像シートの製造方法として、特許文献２にあるように、プリント時のカールが小さく、プリンター内での走行トラブルのない受像シートの製造方法で、シート状芯材の両面にプラスチックフィルムを積層貼合したシート状支持体を用意し、該両面のプラスチックフィルムが芯材よりも熱収縮性を有し、シート状支持体の一方の面に受容層を塗工後、乾燥処理をシート状支持体の両面から行なわれ、かつ裏面側の乾燥温度が受容層側の乾燥温度より１５〜４０℃高くすることが記載されている。
また、従来の方法で製造された熱転写受像シートに、イエロー、マゼンタ、シアンの印字を重ねて、グレーの色相を有する印画物を形成した場合、グレーのハイライト部分が本来のグレーの色相から外れて、黄色味が強く生じたり、赤色味が生じたりしている状態から、熱転写受像シートを保存（特に高温で）すると、印画物のそのグレーの色相を有するハイライト部分が本来のグレーの色相に近づく。つまり、熱転写受像シートは、従来の方法で製造していたとき、保存条件によって、印画物において、グレー等の色相におけるハイライト部分の色相が変化するという問題があった。 In addition, when a printed matter having a gray hue is formed by overlaying yellow, magenta, and cyan prints on a thermal transfer image-receiving sheet produced by a conventional method, the gray highlight portion is not in the original gray hue. When the thermal transfer image-receiving sheet is stored (particularly at a high temperature) from a state in which a yellowish color or a reddish color is generated, the highlight portion having the gray hue of the printed matter is the original gray hue. Get closer to. That is, when the thermal transfer image-receiving sheet is produced by the conventional method, there is a problem that the hue of the highlight portion in the hue such as gray changes in the printed matter depending on the storage conditions.
上記の問題に対し、熱転写受像シートの受容層を構成する樹脂の検討や、熱転写受像シートの製造方法を種々検討しているが、未だ解決されていないのが現状である。 In order to solve the above problems, various investigations have been made on the resin constituting the receiving layer of the thermal transfer image receiving sheet and various methods for producing the thermal transfer image receiving sheet, but these have not been solved yet.
したがって、本発明の目的は、熱転写方式で得られる印画物において、ハイライト部分、特にイエロー、マゼンタ、シアンの印字を重ねて、グレーの色相を有するハイライト部分が本来再現されるべき色相を有する優れた印字品質を有するものが得られる熱転写受像シートの製造方法を提供することである。 Accordingly, an object of the present invention is to provide a hue that should be reproduced in a printed matter obtained by the thermal transfer method, in which highlight portions, particularly yellow, magenta, and cyan prints are overlaid and a gray highlight portion is to be reproduced. It is an object of the present invention to provide a method for producing a thermal transfer image-receiving sheet from which an excellent print quality can be obtained.
請求項１に記載の発明は上記の課題を解決するもので、ロール状に巻き上げられた基材である印刷原反を給紙部に取付け、該給紙部から、該基材を供給して、基材上に、染料受容層を設け、該受容層の形成された基材を排紙部で巻き上げる熱転写受像シートの製造方法において、基材上に染料受容層を形成するための塗工液を塗工後、染料受容層を構成するビニル系樹脂のガラス転移温度よりも高い温度で乾燥し、受容層形成樹脂すなわちビニル系樹脂が軟化した状態で、その後、続けて、該樹脂のガラス転移温度Ｔｇに対し、Ｔｇ±１０℃の温度で、１０秒間以上６０秒以下で乾燥した後、室温まで冷却することを特徴とする熱転写受像シートの製造方法を要旨とする。 The invention according to claim 1 solves the above-described problem, and attaches a printing material, which is a base material wound up in a roll shape, to a paper feeding unit, and supplies the base material from the paper feeding unit. In the method for producing a thermal transfer image receiving sheet, a dye receiving layer is provided on a substrate, and the substrate on which the receiving layer is formed is rolled up at a paper discharge unit. After coating, the resin is dried at a temperature higher than the glass transition temperature of the vinyl resin constituting the dye-receiving layer, and after the receiving layer forming resin, that is, the vinyl resin is softened, the glass transition of the resin is continued. The gist is a method for producing a thermal transfer image-receiving sheet, characterized by drying at a temperature of Tg ± 10 ° C. for 10 seconds or more and 60 seconds or less, and then cooling to room temperature.
本発明の熱転写受像シートの製造方法では、ロール状に巻き上げられた基材である印刷原反を給紙部に取付け、該給紙部から、該基材を供給して、基材上に、染料受容層を設け、該受容層の形成された基材を排紙部で巻き上げる熱転写受像シートの製造方法において、基材上に染料受容層を形成するための塗工液を塗工後、染料受容層を構成するビニル系樹脂のガラス転移温度よりも高い温度で乾燥し、受容層形成樹脂すなわちビニル系樹脂が軟化した状態で、その後、続けて、該樹脂のガラス転移温度Ｔｇに対し、Ｔｇ±１０℃の温度で、１０秒間以上６０秒以下で乾燥し、つまり受容層を構成する樹脂のＴｇに対し、Ｔｇ±１０℃の温度で１０秒以上６０秒以下保持させた後、室温まで冷却するものである。これにより、得られる熱転写受像シートを印画したものは、ハイライト部分、特にイエロー、マゼンタ、シアンの印字を重ねて、グレーの色相を有するハイライト部分が本来再現されるべき色相を有する優れた印字品質のものが得られる。
In the method for producing a thermal transfer image-receiving sheet of the present invention, a printing stock that is a base material wound up in a roll shape is attached to a paper feeding unit, and the base material is supplied from the paper feeding unit, on the base material, In a method for producing a thermal transfer image-receiving sheet in which a dye-receiving layer is provided and a substrate on which the receiving layer is formed is rolled up at a paper discharge unit, a coating liquid for forming the dye-receiving layer is applied on the substrate, and then the dye The resin is dried at a temperature higher than the glass transition temperature of the vinyl resin constituting the receptor layer, and the receptor layer forming resin, that is, the vinyl resin is softened. Subsequently, the glass transition temperature Tg of the resin is reduced to Tg. Dry at a temperature of ± 10 ° C. for 10 seconds or more and 60 seconds or less, that is, hold at a temperature of Tg ± 10 ° C. for 10 seconds or more and 60 seconds or less with respect to the Tg of the resin constituting the receiving layer, and then cool to room temperature To do. As a result, the printed image of the thermal transfer image-receiving sheet thus obtained is an excellent print having a hue that should reproduce the highlight portion, particularly the highlight portion having a gray hue, by overlaying yellow, magenta, and cyan prints. A quality product is obtained.
以下、図面を参照しながら本発明について、実施の形態を詳述する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１は、本発明である熱転写受像シートの製造方法の一つの実施の形態を示す概略説明図である。熱転写受像シートの基材をロール状に巻き上げた印刷原反を取り付けた給紙部と、受容層塗工液を用いて印刷する受容層印刷部と、その塗工された受容層を乾燥させる第１、第２乾燥ゾーン、第３〜第７乾燥ゾーンと、基材上に受容層を塗工した印刷済ロールを巻き上げる排紙部を主体とした構成ユニットからなる印刷機を示したものである。 FIG. 1 is a schematic explanatory view showing one embodiment of a method for producing a thermal transfer image receiving sheet according to the present invention. A paper feeding unit to which a printing raw material obtained by winding a base material of a thermal transfer image receiving sheet into a roll is attached, a receiving layer printing unit for printing using a receiving layer coating liquid, and a first receiving layer for drying the coated receiving layer. 1 shows a printing machine including a constituent unit mainly composed of a first, second drying zone, third to seventh drying zones, and a paper discharge unit that winds up a printed roll having a receiving layer coated on a substrate. .
給紙部に設置される印刷原反は、染料受容層を設ける側と反対側に裏面処理として、裏面印刷、帯電防止処理等を予め施したものでも、また後で詳述する基材を用いて、図示した給紙部と受容層印刷部との間で印刷、処理等を施すこともできる。次に、その給紙部から供給された印刷原反は、インキパンに受容層塗工液を溜めておき、その受容層塗工液（インキ）がグラビア版の版胴に供給され、ドクターによりそのグラビア版の凹部にインキを詰め込み、不要なインキをかき取って、その版胴に付着したインキが、版胴と圧胴との間の圧力により、印刷原反に転移して、印刷される。 The printing stock installed in the paper feeding unit may be one that has been subjected to backside printing, antistatic treatment, etc. in advance as a backside treatment on the side opposite to the side on which the dye-receiving layer is provided. Thus, printing, processing, and the like can be performed between the illustrated paper feeding unit and the receiving layer printing unit. Next, the printing stock supplied from the paper feeding unit stores the receiving layer coating liquid in an ink pan, and the receiving layer coating liquid (ink) is supplied to the plate cylinder of the gravure plate, and the doctor applies the Ink is filled in the concave portion of the gravure plate, and unnecessary ink is scraped off. The ink attached to the plate cylinder is transferred to the printing original fabric by the pressure between the plate cylinder and the impression cylinder, and is printed.
その印刷原反に転移した染料受容層塗工液は、第１、第２乾燥ゾーンと第３〜第７乾燥ゾーンを通過する時に、加熱される。その加熱方式は、熱風吹き付け型乾燥、赤外線ランプ、遠赤外線チューブヒーターによる乾燥や、加熱ドラム（ロール）による乾燥、高周波誘導加熱による乾燥等が適用できる。但し、本発明の熱転写受像シートの製造方法による乾燥は、受容層塗工液を塗工後、その受容層を構成する樹脂のガラス転移温度よりも高い温度で乾燥し、受容層形成樹脂が軟化した状態で、その後、続けて、該樹脂のガラス転移温度近傍の温度で、１０秒間以上乾燥させた後、室温まで冷却するものであり、各乾燥ゾーンにおける乾燥温度の制御を正確に行うことができる乾燥方式が必要である。このような温度制御や実用しやすい点を考慮すると、ノズルから熱風を吹き付ける型の乾燥方式が好ましく用いられる。 The dye-receiving layer coating liquid transferred to the printing original is heated when it passes through the first and second drying zones and the third to seventh drying zones. As the heating method, hot air blowing type drying, drying by an infrared lamp or far infrared tube heater, drying by a heating drum (roll), drying by high frequency induction heating, or the like can be applied. However, the drying by the manufacturing method of the thermal transfer image-receiving sheet of the present invention, after applying the receiving layer coating liquid, drying at a temperature higher than the glass transition temperature of the resin constituting the receiving layer, softening the receiving layer forming resin In this state, after that, after drying for 10 seconds or more at a temperature near the glass transition temperature of the resin, it is cooled to room temperature, and the drying temperature in each drying zone can be accurately controlled. A drying method that can be used is necessary. In consideration of such temperature control and a point where it is easy to put into practical use, a drying method in which hot air is blown from a nozzle is preferably used.
受容層を構成する樹脂の種類によって、乾燥温度の設定は変動するが、その樹脂のガラス転移温度をＴ0とした場合、例えば第１乾燥ゾーンは（Ｔ0＋１０〜３０）℃、第２乾燥ゾーンは（Ｔ0＋１０〜５０）℃、第３〜第５乾燥ゾーンは（Ｔ0＋２０〜５０）℃、第６、第７乾燥ゾーンは（Ｔ0±１０）℃とすることができる。第１、第２乾燥ゾーンは受容層塗工直後に乾燥する部分であり、第２乾燥ゾーンを出た直後の受容層は、表面には被膜が形成されてはいるが、その被膜と基材との間では受容層形成樹脂は軟化状態である。そして、ガイドロール１を経由して、第３乾燥ゾーンに入る。第３〜第５乾燥ゾーンは第１、第２乾燥ゾーンによる乾燥後、受容層の乾燥をより促進させる部分である。しかし、次の第６乾燥ゾーンに入るまでに、受容層全体が乾燥固化してはならず、受容層の内部には受容層形成樹脂が軟化した状態が残っている。そして、受容層が第６、第７乾燥ゾーンでその受容層構成樹脂のガラス転移温度近傍で、１０秒以上乾燥させ、受容層内部の受容層形成樹脂の軟化状態を乾燥固化させる。その後、ロール内部に水を循環させた冷却ロール等を経由して、受容層を室温まで冷却させ、基材上に染料受容層が形成された熱転写受像シートが製造される。 Although the setting of the drying temperature varies depending on the type of resin constituting the receiving layer, when the glass transition temperature of the resin is T 0 , for example, the first drying zone is (T 0 +10 to 30) ° C., the second drying The zone may be (T 0 +10 to 50) ° C., the third to fifth drying zones may be (T 0 +20 to 50) ° C., and the sixth and seventh drying zones may be (T 0 ± 10) ° C. The first and second drying zones are portions that are dried immediately after application of the receiving layer, and the receiving layer immediately after leaving the second drying zone has a film formed on the surface. The receiving layer forming resin is in a softened state. Then, it enters the third drying zone via the guide roll 1. The third to fifth drying zones are portions that further promote drying of the receiving layer after drying by the first and second drying zones. However, the entire receiving layer must not be dried and solidified before entering the next sixth drying zone, and the receiving layer forming resin remains softened inside the receiving layer. Then, the receiving layer is dried in the sixth and seventh drying zones in the vicinity of the glass transition temperature of the receiving layer constituting resin for 10 seconds or more to dry and solidify the softened state of the receiving layer forming resin inside the receiving layer. Thereafter, the receiving layer is cooled to room temperature via a cooling roll or the like in which water is circulated inside the roll, and a thermal transfer image receiving sheet having a dye receiving layer formed on a substrate is produced.
本発明における、基材上に染料受容層を形成するための塗工液を塗工後、染料受容層を構成する樹脂のガラス転移温度よりも高い温度で乾燥し、受容層形成樹脂が軟化状態で、その後、続けて、該樹脂のガラス転移温度近傍の温度で、１０秒間以上乾燥した後、室温まで冷却することを特徴としている点で、上記の受容層形成樹脂が軟化状態とは、受容層表面の被膜と基材との間では受容層形成樹脂が高温により軟化した状態であり、受容層全体が乾燥固化していなく、受容層の内部には軟化した樹脂成分が残っていることを意味している。 In the present invention, after coating the coating liquid for forming the dye-receiving layer on the substrate, it is dried at a temperature higher than the glass transition temperature of the resin constituting the dye-receiving layer, and the receiving layer-forming resin is in a softened state Then, the above-mentioned receptor layer-forming resin is said to be in a soft state in that it is characterized in that it is dried at a temperature near the glass transition temperature of the resin for 10 seconds or more and then cooled to room temperature. Between the coating on the surface of the layer and the substrate, the receiving layer forming resin is in a softened state due to high temperature, the entire receiving layer is not dried and solidified, and the softened resin component remains inside the receiving layer. I mean.
受容層構成樹脂のガラス転移温度近傍で、１０秒以上乾燥させる際、乾燥ゾーンの長さや、印刷速度を考慮して、実用上、６０秒程度がそのガラス転移温度近傍で保持させる上限時間である。図示した製造方法を説明する印刷機では、受容層印刷部から第１〜第７乾燥ゾーンを経由して、排紙部で巻き取られるものであるが、これに限らず、受容層印刷部と、複数の乾燥ゾーンを経由して、次の印刷ユニット（例えば裏面印刷、受容層上の離型層印刷、裏面側の基材とのラミネート印刷等）を設け、その印刷ユニットで印刷されたインキの乾燥ゾーンを設け、その乾燥ゾーンの全体あるいは排出側で、受容層構成樹脂のガラス転移温度近傍の温度で、１０秒間以上乾燥させた後、室温まで冷却することも可能である。この場合は、受容層印刷部のすぐ次の複数の乾燥ゾーンでは、未だ受容層全体が乾燥固化していなく、受容層の内部には樹脂の軟化状態が残っている前提である。 When drying for 10 seconds or more in the vicinity of the glass transition temperature of the receiving layer constituting resin, in consideration of the length of the drying zone and the printing speed, about 60 seconds is practically the upper limit time for holding near the glass transition temperature. . In the printing machine illustrating the illustrated manufacturing method, the receiving layer printing unit is wound around the paper discharge unit via the first to seventh drying zones. Ink printed on the printing unit by providing the next printing unit (for example, back side printing, release layer printing on the receiving layer, laminating printing on the back side substrate, etc.) via a plurality of drying zones It is also possible to provide a drying zone, and after drying for 10 seconds or more at a temperature in the vicinity of the glass transition temperature of the receiving layer constituting resin on the whole or discharge side of the drying zone, cooling to room temperature is also possible. In this case, in the plurality of drying zones immediately following the receiving layer printing portion, the entire receiving layer is not yet dried and solidified, and the resin is still softened inside the receiving layer.
そして、次の印刷ユニットで印刷後、その印刷されたインキ及び受容層塗工液が、その印刷ユニットの乾燥ゾーンで乾燥するものである。その印刷ユニットの乾燥ゾーンでは受容層内部の樹脂の軟化状態を乾燥固化させ、また該印刷ユニットで印刷されたインキの乾燥が行なわれる。尚、基材上に設けた染料受容層において、その受容層内部の液状物質が乾燥固化した後は、受容層をその構成する樹脂のガラス転移温度近く、またはガラス転移温度を超える温度で加熱することは避け、受容層を含む基材を室温まで冷却する必要がある。 Then, after printing in the next printing unit, the printed ink and the receiving layer coating liquid are dried in the drying zone of the printing unit. In the drying zone of the printing unit, the softened state of the resin inside the receiving layer is dried and solidified, and the ink printed by the printing unit is dried. In the dye receiving layer provided on the substrate, after the liquid substance in the receiving layer is dried and solidified, the receiving layer is heated at a temperature close to or exceeding the glass transition temperature of the resin constituting the receiving layer. The substrate containing the receiving layer must be cooled to room temperature.
以下、本発明における熱転写受像シートの製造方法で作製される熱転写受像シートを構成する各要素毎に詳述する。
（基材）
熱転写受像シートに用いる基材としては、受容層を保持するという役割を有するとともに、画像形成時に加えられる熱に耐え、取り扱い上支障のない機械的特性を有することが望ましい。このような基材の材料は特に限定されず、例えば、ポリエステル、ポリアリレート、ポリカーボネート、ポリウレタン、ポリイミド、ポリエーテルイミド、セルロース誘導体、ポリエチレン、エチレン・酢酸ビニル共重合体、ポリプロピレン、ポリスチレン、アクリル、ポリ塩化ビニル、ポリ塩化ビニリデン、ポリビニルアルコール、ポリビニルブチラール、ナイロン、ポリエーテルエーテルケトン、ポリサルフォン、ポリエーテルサルフォン、テトラフルオロエチレン・パーフルオロアルキルビニルエーテル、ポリビニルフルオライド、テトラフルオロエチレン・エチレン、テトラフルオロエチレン・ヘキサフルオロプロピレン、ポリクロロトリフルオロエチレン、ポリビニリデンフルオライド等の各種プラスチックフィルムまたはシートが使用でき、特に限定されない。
Hereinafter, each element constituting the thermal transfer image receiving sheet produced by the method for producing a thermal transfer image receiving sheet in the present invention will be described in detail.
(Base material)
The base material used for the thermal transfer image-receiving sheet desirably has a mechanical property that has a role of holding the receiving layer, can withstand heat applied during image formation, and has no trouble in handling. The material of such a substrate is not particularly limited. For example, polyester, polyarylate, polycarbonate, polyurethane, polyimide, polyetherimide, cellulose derivative, polyethylene, ethylene / vinyl acetate copolymer, polypropylene, polystyrene, acrylic, poly Vinyl chloride, polyvinylidene chloride, polyvinyl alcohol, polyvinyl butyral, nylon, polyether ether ketone, polysulfone, polyether sulfone, tetrafluoroethylene / perfluoroalkyl vinyl ether, polyvinyl fluoride, tetrafluoroethylene / ethylene, tetrafluoroethylene / Various plastic films or sheets such as hexafluoropropylene, polychlorotrifluoroethylene, and polyvinylidene fluoride Can be used is not particularly limited.
上記にあげたものやこれらの合成樹脂に白色顔料や充填剤を加えて成膜した白色フィルム、あるいは基材内部に空隙（ミクロボイド）を有するシート、他にコンデンサーペーパー、グラシン紙、硫酸紙、合成紙（ポリオレフィン系、ポリスチレン系）、上質紙、アート紙、コート紙、キャストコート紙、合成樹脂又はエマルジョン含浸紙、合成ゴムラテックス含浸紙、合成樹脂内添紙、セルロース繊維紙等を用いることができる。上記の基材内部に空隙（ミクロボイド）を有するものは、従来公知のものでよく、例えば、東洋紡績株式会社製のトヨパールＳＳＰ４２５５（厚み３５μｍ）、モービルプラスチックヨーロッパ製のＭＷ２４７（厚み３５μｍ）等の基材内部にミクロボイド（微細な空孔）を有するポリプロピレンフィルム、ダイヤホイル株式会社製のＷ−９００（５０μｍ）、東レ株式会社製のＥ−６０（５０μｍ）等の内部にミクロボイドを有するポリエチレンテレフタレートフィルムが好ましく使用される。 White films formed by adding white pigments and fillers to those listed above, or sheets with voids (microvoids) inside the substrate, capacitor paper, glassine paper, sulfuric acid paper, synthetic Paper (polyolefin type, polystyrene type), fine paper, art paper, coated paper, cast coated paper, synthetic resin or emulsion impregnated paper, synthetic rubber latex impregnated paper, synthetic resin internal paper, cellulose fiber paper, etc. can be used. . What has a space | gap (micro void) inside said base material may be a conventionally well-known thing, for example, bases, such as Toyopearl SSP4255 (thickness 35 micrometers) by Toyobo Co., Ltd., MW247 (thickness 35 micrometers) made by Mobil Plastic Europe, etc. Polyethylene terephthalate film having micro voids inside such as polypropylene film having micro voids (fine pores) inside the material, W-900 (50 μm) manufactured by Diafoil Co., Ltd., E-60 (50 μm) manufactured by Toray Industries, Inc. Preferably used.
また、基材として、上記の基材の複数の任意の組合わせで、接着剤層により貼り合わせた基材、すなわち貼り合わせ基材も使用できる。貼り合わせ基材は、セルロース繊維紙やプラスチックフィルム等の芯材に接着剤層を用いて、合成紙や基材内部に空隙（ミクロボイド）を有するフィルム等のクッション性のある貼合材と貼り合わせることができる。尚、貼り合わせ基材は、芯材の片側に、貼合材を貼り合わせても、芯材の両側に貼合材を貼り合わせたものでも、いずれでも良い。貼り合わせの方法は、ドライラミネーション、ウェットラミネーション、ノンソルベントラミネーション、ＥＣラミネーション、ヒートシール等公知の方法を使用することができる。接着剤層は、芯材側に塗工してもよいし、貼合材側に塗工してもよいが、芯材に紙を用いる場合は紙の地合いを効果的に消すために、紙側に塗工することが好ましい。また、上記の基材の表面及び又は裏面に、コロナ放電処理等の易接着処理した基材も使用できる。但し、本発明における熱転写受像シートでは、熱転写方式で得られる印画物において、ハイライト部分、特にイエロー、マゼンタ、シアンの印字を重ねて、グレーの色相を有するハイライト部分が本来再現されるべき色相を有する優れた印字品質をもたせるために、基材の特に受容層を形成する側の基材表面は白色性の高いものを使用することが望ましい。
（受容層）
基材上に設ける受容層は、従来公知のものが使用できる。例えば、受容層は、色材を転写または染着し易い熱可塑性樹脂を主成分とするワニスに、必要に応じて離型剤等の各種添加剤を加えて構成する。染着し易い熱可塑性樹脂は、ポリプロピレン等のポリオレフィン樹脂、ポリ塩化ビニル、ポリ塩化ビニリデン等のハロゲン化樹脂、ポリ酢酸ビニル、ポリアクリル酸エステル等のビニル系樹脂、及びその共重合体、ポリエチレンテレフタレート、ポリプチレンテレフタレート等のポリエステル系樹脂、ポリスチレン系樹脂、ポリアミド系樹脂、エチレンやプロピレン等のオレフィンと他のビニル系モノマーとの共重合体、アイオノマー、セルロ−ス誘導体等の単体、又は混合物を用いることができ、これらの中でもポリエステル系樹脂、及びビニル系樹脂が好ましい。
Moreover, as a base material, the base material bonded together by the adhesive bond layer by the arbitrary arbitrary combinations of said base material, ie, a bonding base material, can also be used. The bonding substrate is bonded to a cushioning bonding material such as a synthetic paper or a film having voids (micro voids) inside the substrate using an adhesive layer on a core material such as cellulose fiber paper or plastic film. be able to. In addition, even if a bonding base material is bonded together on the one side of a core material, what bonded the bonding material on both sides of the core material may be sufficient as a bonding base material. As a bonding method, known methods such as dry lamination, wet lamination, non-solvent lamination, EC lamination, heat sealing, and the like can be used. The adhesive layer may be applied to the core material side or may be applied to the bonding material side, but when using paper for the core material, in order to effectively erase the texture of the paper, It is preferable to apply to the side. Moreover, the base material which carried out the easy adhesion process of corona discharge treatment etc. can also be used for the surface and / or back surface of said base material. However, in the thermal transfer image-receiving sheet according to the present invention, in the printed matter obtained by the thermal transfer method, the highlight portion, particularly the highlight portion having a gray hue, should be reproduced by overlaying yellow, magenta, and cyan printing. In order to provide an excellent print quality having the above, it is desirable to use a substrate having a high whiteness on the surface of the substrate, particularly on the side where the receiving layer is formed.
(Receptive layer)
A conventionally well-known thing can be used for the receiving layer provided on a base material. For example, the receiving layer is formed by adding various additives such as a release agent to a varnish mainly composed of a thermoplastic resin that easily transfers or dyes a coloring material. Thermoplastic resins that are easily dyed include polyolefin resins such as polypropylene, halogenated resins such as polyvinyl chloride and polyvinylidene chloride, vinyl resins such as polyvinyl acetate and polyacrylate, and copolymers thereof, polyethylene terephthalate Polyesterene terephthalate and other polyester resins, polystyrene resins, polyamide resins, copolymers of olefins such as ethylene and propylene and other vinyl monomers, ionomers, cellulose derivatives and the like, or mixtures Among these, polyester resins and vinyl resins are preferable.
本発明の熱転写受像シートの製造方法では、染料受容層を構成する樹脂はガラス転移温度を有する熱可塑性樹脂を使用することが前提である。そして、上記に挙げたような熱可塑性樹脂の中で、異なる樹脂を組み合わせたり、あるいは分子量等が異なるが、同種の熱可塑性樹脂を組み合わせて使用してもよい。但し、その組み合わせる樹脂のガラス転移温度は、それらのＴｇの差は１０℃程度が上限であり、Ｔｇの差が少ない樹脂を組み合わせることが好ましい。また、受容層を構成する樹脂が複数有る場合、構成成分として主体となる樹脂の方のＴｇを基準として、そのＴｇよりも高い温度で乾燥し、その後、続けて、該Ｔｇ近傍の温度で、１０秒間以上乾燥した後、室温まで冷却するようにする。 In the method for producing a thermal transfer image-receiving sheet of the present invention, it is premised that the resin constituting the dye-receiving layer is a thermoplastic resin having a glass transition temperature. And among the thermoplastic resins listed above, different resins may be combined, or the same kind of thermoplastic resins may be used in combination, although the molecular weights and the like are different. However, the upper limit of the glass transition temperature of the resin to be combined is preferably about 10 ° C., and it is preferable to combine resins having a small difference in Tg. In addition, when there are a plurality of resins constituting the receiving layer, drying is performed at a temperature higher than the Tg based on the Tg of the main resin as a constituent component, and then at a temperature near the Tg, After drying for 10 seconds or more, cool to room temperature.
本発明は、染料受容層用塗工液を塗工後、染料受容層を構成する樹脂のガラス転移温度よりも高い温度で乾燥し、受容層形成樹脂が軟化した状態で、その後、続けて、該樹脂のガラス転移温度近傍の温度で、１０秒間以上乾燥した後、室温まで冷却するものである。すなわち、受容層形成樹脂のＴｇよりも高い温度で乾燥して、基材上の受容層表面には被膜が形成されてはいるが、その被膜と基材との間では受容層形成樹脂が軟化した状態であり、その後、続けて、該受容層形成樹脂のＴｇ近傍の温度で、１０秒間以上乾燥して、受容層内部の樹脂の軟化状態を乾燥固化させ、つまり受容層全体を乾燥固化させ、その後、受容層を室温まで冷却させるものである。この現象を受容層における内部変化として、説明すると以下のようなことが考察される。 The present invention, after coating the dye-receiving layer coating liquid, dried at a temperature higher than the glass transition temperature of the resin constituting the dye-receiving layer, in a state where the receiving layer-forming resin is softened, then, The resin is dried at a temperature near the glass transition temperature of the resin for 10 seconds or more and then cooled to room temperature. That is, it is dried at a temperature higher than the Tg of the receiving layer forming resin, and a coating is formed on the surface of the receiving layer on the substrate, but the receiving layer forming resin is softened between the coating and the substrate. Subsequently, it is dried for 10 seconds or more at a temperature in the vicinity of the Tg of the receiving layer forming resin to dry and solidify the softened state of the resin inside the receiving layer, that is, the entire receiving layer is dried and solidified. Thereafter, the receiving layer is cooled to room temperature. If this phenomenon is explained as an internal change in the receiving layer, the following can be considered.
基材上に受容層用塗工液により、塗工直後、受容層を構成する樹脂のガラス転移温度よりも高い温度で乾燥すると、基材上の受容層表面が乾燥して被膜が形成される。しかし、その被膜と基材との間における受容層は軟化状態であり、被膜と基材との間の中で流動性を有した状態である。その状態から、続けて、該受容層形成樹脂のＴｇ近傍の温度で、１０秒間以上乾燥、保持させた後、室温まで冷却させると、受容層を構成する樹脂の結晶化の度合いが進み、耐熱性等の耐久性を有した受容層が形成できると思われる。それに対して、受容層用塗工液により、塗工直後、受容層を構成する樹脂のガラス転移温度よりも高い温度で乾燥を続けて行うと、受容層表面が乾燥して被膜が形成し、さらにその後、被膜と基材との間の流動性を有した状態の受容層も、受容層形成樹脂のＴｇよりも高い温度から、室温まで温度低下が比較的急激に行なわれるため、受容層構成樹脂の結晶化の度合いが少ない状態で受容層全体が乾燥固化される。この状態の受容層は耐熱性等の耐久性が弱く、例えば、その受容層を有する熱転写受像シートを用いて、熱転写画像を形成すると、イエロー、マゼンタ、シアンの印字を重ねたグレーの色相を有するハイライト部分が本来のグレーの色相から外れて、黄色味が強く生じたりしやすい。 When the receiving layer coating solution on the substrate is dried immediately after coating at a temperature higher than the glass transition temperature of the resin constituting the receiving layer, the surface of the receiving layer on the substrate is dried to form a film. . However, the receiving layer between the coating and the substrate is in a softened state and has fluidity between the coating and the substrate. From that state, after drying and holding for 10 seconds or more at a temperature in the vicinity of the Tg of the receiving layer forming resin and then cooling to room temperature, the degree of crystallization of the resin constituting the receiving layer increases, It seems that a receiving layer having durability such as property can be formed. On the other hand, when the drying is continued at a temperature higher than the glass transition temperature of the resin constituting the receiving layer immediately after coating with the coating liquid for the receiving layer, the surface of the receiving layer is dried to form a film, Further, since the temperature of the receiving layer having fluidity between the coating and the substrate is relatively rapidly lowered from the temperature higher than the Tg of the receiving layer forming resin to room temperature, the receiving layer structure The entire receiving layer is dried and solidified in a state where the degree of crystallization of the resin is small. The receiving layer in this state has low durability such as heat resistance. For example, when a thermal transfer image is formed using a thermal transfer image receiving sheet having the receiving layer, the receiving layer has a gray hue in which yellow, magenta, and cyan printing are superimposed. The highlight part is out of the original gray hue, and the yellow color tends to be strong.
受容層は、画像形成時に熱転写シートとの熱融着を防ぐために、離型剤を配合することもできる。離型剤は、シリコーンオイル、リン酸エステル系可塑剤、フッ素系化合物を用いることができるが、この中でもシリコーンオイルが好ましく用いられる。離型剤の添加量は、受容層形成樹脂に対して０．２〜３０質量部が好ましい。離型剤は、上述のように受容層に添加してもよいが、受容層表面に上述の材料を用いて別途形成しても良い。受容層は、上記に挙げたような熱可塑性樹脂と、離型剤や必要に応じて蛍光増白剤その他の添加剤を加え、それらの成分を溶解、ないし分散させる溶媒（溶剤、ないし水）を用いて塗工液を用意する。受容層の塗布は、ロールコート、バーコート、グラビアコート、グラビアリバースコート等の一般的な方法で行なわれる。そして、その塗布量は０．５〜２０ｇ／ｍ2（固形分換算）が好ましい。
（中間層）
また、熱転写受像シートは基材と受容層の間に各種の樹脂からなる中間層を設けることもできる。中間層の機能として、耐溶剤性能、バリア性能、接着性能、白色付与能、隠蔽性能、クッション性、帯電防止性などが挙げられるが、これらに限定されることなく、従来公知の中間層全てが使用できる。このような中間層に様々な役割を担わせることで熱転写受像シートに優れた機能を付加することができる。中間層には、白色度、隠蔽性、調色等の目的に応じて種々の顔料、染料、蛍光増白剤、その他添加剤を熱転写受像シートとしての機能を損ねないレベルで加えることが可能である。特に、本発明では、中間層に白色性をもたせることが好ましく、ＴｉＯ2系化合物を添加した中間層を使用することができる。
The receiving layer may contain a release agent in order to prevent thermal fusion with the thermal transfer sheet during image formation. As the release agent, silicone oil, phosphate plasticizer, and fluorine compound can be used. Among these, silicone oil is preferably used. The addition amount of the release agent is preferably 0.2 to 30 parts by mass with respect to the receiving layer forming resin. The release agent may be added to the receiving layer as described above, but may be separately formed on the surface of the receiving layer using the material described above. The receiving layer is a solvent (solvent or water) that dissolves or disperses these components by adding a thermoplastic resin as mentioned above, a mold release agent and, if necessary, a fluorescent brightening agent and other additives. Prepare a coating solution using. The receiving layer is applied by a general method such as roll coating, bar coating, gravure coating, or gravure reverse coating. The coating amount is preferably 0.5 to 20 g / m 2 (in terms of solid content).
(Middle layer)
Further, the thermal transfer image receiving sheet can be provided with an intermediate layer made of various resins between the base material and the receiving layer. Examples of the function of the intermediate layer include solvent resistance performance, barrier performance, adhesion performance, white color imparting ability, hiding performance, cushioning property, antistatic property, etc. Can be used. By providing the intermediate layer with various roles, an excellent function can be added to the thermal transfer image-receiving sheet. Various pigments, dyes, fluorescent whitening agents, and other additives can be added to the intermediate layer at a level that does not impair the function as a thermal transfer image-receiving sheet, depending on the purpose of whiteness, hiding, toning, etc. is there. In particular, in the present invention, it is preferable to impart whiteness to the intermediate layer, and an intermediate layer to which a TiO 2 compound is added can be used.
次に、実施例及び比較例を挙げて、本発明を更に詳述する。尚、特に断りの無い限り、文中の部または％は質量基準である。 Next, an Example and a comparative example are given and this invention is further explained in full detail. Unless otherwise specified, parts or% in the text is based on mass.
まず以下に示す条件の基材を用意した。貼り合わせ基材の芯材である上質紙（坪量１５７ｇ／ｍ2）の受容層側に、基材内部にミクロボイドを有するポリエチレンテレフタレートフィルム（東洋紡（株）製、ＦＫ００３、厚さ３８μｍ）を下記組成の接着剤層を５．０ｇ／ｍ2（固形分）を用いて、（接着剤層はグラビア印刷機により塗工、乾燥して形成した）、貼り合わせ、さらに該上質紙の他方の面に、ポリエチレンテレフタレートフィルム（東レ（株）製、Ｔ−６０、厚さ２５μｍ）を上で使用した接着剤と同じものを用いて、接着剤層を５．０ｇ／ｍ2（固形分）を用いて（接着剤層はグラビア印刷機により塗工、乾燥して形成した）、貼り合わせ、貼り合わせ基材を作製し、図１に示す給紙部に印刷原反として取り付けた。 First, a substrate having the following conditions was prepared. A polyethylene terephthalate film (Toyobo Co., Ltd., FK003, thickness 38 μm) having microvoids inside the base material on the receiving layer side of fine paper (basis weight 157 g / m 2 ) which is the core material of the bonded base material is as follows. Using an adhesive layer having a composition of 5.0 g / m 2 (solid content) (the adhesive layer was formed by coating and drying with a gravure printing machine), bonding, and further, the other side of the fine paper In addition, using the same adhesive as that used above with a polyethylene terephthalate film (T-60, thickness: 25 μm, manufactured by Toray Industries, Inc.), using an adhesive layer of 5.0 g / m 2 (solid content) (The adhesive layer was formed by coating and drying with a gravure printing machine), and bonding and bonding base materials were prepared, and attached to the paper feed unit shown in FIG.
次に、この貼り合わせ基材の印刷原反における、内部にミクロボイドを有するポリエチレンテレフタレートフィルム面に下記組成の中間層用インキを乾燥塗布量が２．０ｇ／ｍ２になるように、グラビアコーターにより塗布し、熱風乾燥のドライヤーで乾燥し、中間層を設け、その後、中間層上に下記組成の染料受容層用塗工液を、図１に示すようにグラビアコーターにより、乾燥時２．０ｇ／ｍ2になる割合で塗布し、図１に示すような第１〜第７乾燥ゾーンが取り付けられた熱風吹き付け型ドライヤーを用いて、乾燥させ、図１に示すようにガイドロールを経由して、排紙部で受容層の印刷済の基材を巻き上げた。但し、第１〜第７乾燥ゾーンの各乾燥温度と、各乾燥時間、印刷速度は以下の通りであり、また第７乾燥ゾーンを出てから、排紙部までに、受容層が形成された基材は室温まで冷却されるものである。
（接着剤層用塗工液組成）
ポリエステル系粘着剤（ＳＫダイン５２７３：綜研化学製） ８０部
メチルエチルケトン／トルエン／酢酸エチル＝１／１／１（質量比） ２０部
（中間層用塗工液組成）
ポリエステル樹脂（ＷＲ−９０５、日本ポリウレタン（株）製） １３．１部
酸化チタン（ＴＣＡ−８８８、トーケムプロダクツ（株）製） ２６．２部
蛍光増白剤（ベンゾイミダゾール誘導体） ０．３９部
（ユビテックスＢＡＣ、ＣＩＢＡ−ＧＥＩＧＹ ＣＯ．製）
水／ＩＰＡ（質量比２／１） ６０部
（染料受容層用塗工液組成）
塩化ビニル−酢酸ビニル共重合体 ６０部
（＃１０００ＡＫＴ、電気化学工業（株）製）
エポキシ変性シリコーン １．２部
（Ｘ−２２−３０００Ｔ、信越化学工業（株）製）
メチルスチル変性シリコーン ０．６部
（２４−５１０、信越化学工業（株）製）
メチルエチルケトン／トルエン（質量比１／１） ５部
第１乾燥ゾーン；８０℃、第２乾燥ゾーン；１００℃、第３乾燥ゾーン；１１５℃、第４乾燥ゾーン；１２０℃、第５乾燥ゾーン；１２０℃、第６乾燥ゾーン；７０℃、第７乾燥ゾーン；６０℃、各乾燥ゾーンの上記乾燥温度は受容層表面における実測温度である。
Next, the intermediate layer ink having the following composition is applied to the surface of the polyethylene terephthalate film having microvoids in the printing raw material of the bonded substrate by a gravure coater so that the dry coating amount is 2.0 g / m 2. Then, it is dried with a hot-air dryer, and an intermediate layer is provided. Thereafter, a coating solution for a dye-receiving layer having the following composition is formed on the intermediate layer by a gravure coater as shown in FIG. 2 is applied and dried using a hot air blowing type dryer equipped with first to seventh drying zones as shown in FIG. 1 and discharged through a guide roll as shown in FIG. The printed substrate of the receiving layer was rolled up at the paper part. However, each drying temperature, each drying time, and the printing speed of the first to seventh drying zones are as follows, and the receiving layer was formed from the seventh drying zone to the paper discharge unit. The substrate is cooled to room temperature.
(Coating solution composition for adhesive layer)
Polyester adhesive (SK Dyne 5273: manufactured by Soken Chemical) 80 parts Methyl ethyl ketone / toluene / ethyl acetate = 1/1/1 (mass ratio) 20 parts (intermediate layer coating composition)
Polyester resin (WR-905, manufactured by Nippon Polyurethane Co., Ltd.) 13.1 parts Titanium oxide (TCA-888, manufactured by Tochem Products Co., Ltd.) 26.2 parts Optical brightener (benzimidazole derivative) 0.39 parts (Ubitex BAC, manufactured by CIBA-GEIGY CO.)
60 parts of water / IPA (mass ratio 2/1) (coating liquid composition for dye receiving layer)
60 parts of vinyl chloride-vinyl acetate copolymer (# 1000 AKT, manufactured by Denki Kagaku Kogyo Co., Ltd.)
Epoxy-modified silicone 1.2 parts (X-22-3000T, manufactured by Shin-Etsu Chemical Co., Ltd.)
Methylstil modified silicone 0.6 parts (24-510, manufactured by Shin-Etsu Chemical Co., Ltd.)
Methyl ethyl ketone / toluene (mass ratio 1/1) 5 parts First drying zone; 80 ° C., second drying zone; 100 ° C., third drying zone; 115 ° C., fourth drying zone; 120 ° C., fifth drying zone; 70 ° C., seventh drying zone: 60 ° C. The above drying temperature in each drying zone is the measured temperature on the surface of the receiving layer.
乾燥時間は、第１〜第５乾燥ゾーンを受容層塗工後の基材が約２１秒間、乾燥され、第６と第７乾燥ゾーンでは約２４秒間、乾燥させる条件である。また、印刷速度は５０ｍ／ｍｉｎである。尚、上記の受容層構成樹脂のガラス転移温度は＃１０００ＡＫＴが７０℃である。
［比較例１］
上記実施例１と同様の構成の貼り合せ基材を用意し、実施例１で用いた中間層、染料受容層の各塗工液を用いて、実施例１と同様にして、中間層、染料受容層を基材上に形成した。但し、染料受容層の乾燥条件のみ、以下の条件とした。
The drying time is a condition in which the substrate after coating the receiving layer in the first to fifth drying zones is dried for about 21 seconds, and the sixth and seventh drying zones are dried for about 24 seconds. The printing speed is 50 m / min. The glass transition temperature of the above-mentioned receiving layer constituting resin is # 1000 AKT is 70 ° C.
[Comparative Example 1]
A bonded substrate having the same structure as in Example 1 was prepared, and the intermediate layer and the dye were used in the same manner as in Example 1 using the coating liquids for the intermediate layer and the dye receiving layer used in Example 1. A receiving layer was formed on the substrate. However, only the drying conditions of the dye receiving layer were as follows.
第１乾燥ゾーン；８０℃、第２乾燥ゾーン；１００℃、第３乾燥ゾーン；１１５℃、第４乾燥ゾーン；１２０℃、第５乾燥ゾーン；１２０℃、第６乾燥ゾーン；７０℃、第７乾燥ゾーン；３０℃、各乾燥ゾーンの上記乾燥温度は受容層表面における実測温度である。 80 ° C, second drying zone; 100 ° C, third drying zone; 115 ° C, fourth drying zone; 120 ° C, fifth drying zone; 120 ° C, sixth drying zone; 70 ° C, seventh Drying zone: 30 ° C. The drying temperature in each drying zone is the measured temperature on the surface of the receiving layer.
乾燥時間は、第１〜第５乾燥ゾーンを受容層塗工後の基材が約２８秒間、乾燥され、第６乾燥ゾーンで約７秒間、第７乾燥ゾーンでは約５秒間、乾燥させる条件である。また、印刷速度は５０ｍ／ｍｉｎである。 The drying time is a condition in which the substrate after coating the receiving layer in the first to fifth drying zones is dried for about 28 seconds, and is dried for about 7 seconds in the sixth drying zone and about 5 seconds in the seventh drying zone. is there. The printing speed is 50 m / min.
上記の各実施例及び比較例の方法により製造された熱転写受像シートをカットし、熱転写フィルムとして、キャノン（株）製ビデオプリンターＣＰ−１００用熱転写シートを使用し、染料受容層面と熱転写シートの染料層を対向させて重ね合わせ、Ｙ、Ｍ、Ｃの順番で熱転写シートの裏面から、キャノン（株）製ビデオプリンターＣＰ−１００を使用して、サーマルヘッドによる熱転写記録を行った。但し、印画パターンは各色全て、９ステップの階調テストパターンであり、その１ステップ目のハイライト部の印画部（グレー部）のｂ値を以下の方法で測定した。 The thermal transfer image-receiving sheet produced by the method of each of the above examples and comparative examples was cut, and a thermal transfer sheet for a video printer CP-100 manufactured by Canon Inc. was used as the thermal transfer film, and the dye-receiving layer surface and the dye of the thermal transfer sheet The layers were stacked facing each other, and thermal transfer recording with a thermal head was performed from the back surface of the thermal transfer sheet in the order of Y, M, and C using a video printer CP-100 manufactured by Canon Inc. However, the printing pattern is a nine-step gradation test pattern for each color, and the b value of the printing portion (gray portion) of the highlight portion of the first step was measured by the following method.
ｂ値は、ミノルタ製色彩色差計ＣＲ−２２１にて、ＪＩＳ−Ｚ８７２２に規定された方法で測定し、ＪＩＳ−Ｚ８７３０によって規定された方法で表示した場合で、数値を出した。尚、ｂ値は、黄色味の指標であり、この数値が大きい場合は黄色味が強いことを示し、−（マイナス）になると黄色味が不足し青くなることを示している。そして、ｂ値が０の場合は、無色を意味している。 The b value was measured with a Minolta color difference meter CR-221 according to the method defined in JIS-Z8722, and the numerical value was obtained when displayed by the method defined in JIS-Z8730. The b value is an index of yellowishness. When this value is large, it indicates that yellowishness is strong, and when it is-(minus), it indicates that yellowishness is insufficient and blue. And when b value is 0, it means colorlessness.
実施例１の熱転写受像シートでは、ｂ値が−４．５であり、また比較例１の熱転写受像シートではｂ値が＋４．０であった。実施例１における熱転写受像シートの印画物のグレーのハイライト部は、本来再現されるべき色相のグレーであり、黄色味や赤色味等が目立たないものであった。それに対し、比較例１の熱転写受像シートの印画物のグレーのハイライト部は、かなり黄色味が見られるものであった。 In the thermal transfer image receiving sheet of Example 1, the b value was −4.5, and in the thermal transfer image receiving sheet of Comparative Example 1, the b value was +4.0. The gray highlight portion of the printed matter of the thermal transfer image-receiving sheet in Example 1 is a gray of a hue that should be reproduced originally, and yellowishness, redness, and the like are inconspicuous. On the other hand, the gray highlight portion of the printed matter of the thermal transfer image-receiving sheet of Comparative Example 1 was considerably yellowish.
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| US20080254382A1 (en) | 2007-03-27 | 2008-10-16 | Fujifilm Corporation | Heat-sensitive transfer sheet and image-forming method |
| US8017552B2 (en) | 2007-03-29 | 2011-09-13 | Fujifilm Corporation | Heat-sensitive transfer sheet and image-formation method |
| EP1974948A3 (en) | 2007-03-29 | 2012-02-08 | FUJIFILM Corporation | Image-forming method using heat-sensitive transfer system |
| US8119562B2 (en) | 2007-03-29 | 2012-02-21 | Fujifilm Corporation | Heat-sensitive transfer sheet and image-forming method using heat-sensitive transfer system |
| US8129309B2 (en) | 2007-03-29 | 2012-03-06 | Fujifilm Corporation | Heat-sensitive transfer sheet for use in heat-sensitive transfer system and image-forming method using heat-sensitive transfer system |
| JP2008273641A (en) | 2007-04-25 | 2008-11-13 | Fujifilm Corp | Cardboard cylinder for heat-sensitive transfer image-receiving sheet, roll shape machined article and image forming method of the sheet |
| JP2009056599A (en) | 2007-08-29 | 2009-03-19 | Fujifilm Corp | Thermosensitive transfer sheet |
| JP2009073191A (en) | 2007-08-30 | 2009-04-09 | Fujifilm Corp | Thermosensitive transfer image receiving sheet, image forming method and image prints |
| JP2009083279A (en) | 2007-09-28 | 2009-04-23 | Fujifilm Corp | Heat-sensitive transfer sheet |
| DE602008002538D1 (en) | 2007-12-28 | 2010-10-28 | Fujifilm Corp | Method for imaging by means of heat-sensitive transmission system |
| JP4892497B2 (en) | 2008-01-28 | 2012-03-07 | 富士フイルム株式会社 | Thermal transfer image-receiving sheet |
| US7760219B2 (en) | 2008-01-28 | 2010-07-20 | Fujifilm Corporation | Method of forming image by thermal transfer |
| ATE544610T1 (en) | 2008-09-30 | 2012-02-15 | Fujifilm Corp | HEAT SENSITIVE TRANSFER SHEET |
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