JP2016137646A - Thermal transfer image receiving sheet - Google Patents
Thermal transfer image receiving sheet Download PDFInfo
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- JP2016137646A JP2016137646A JP2015014066A JP2015014066A JP2016137646A JP 2016137646 A JP2016137646 A JP 2016137646A JP 2015014066 A JP2015014066 A JP 2015014066A JP 2015014066 A JP2015014066 A JP 2015014066A JP 2016137646 A JP2016137646 A JP 2016137646A
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- 238000012546 transfer Methods 0.000 title claims abstract description 53
- 239000011347 resin Substances 0.000 claims abstract description 40
- 229920005989 resin Polymers 0.000 claims abstract description 40
- 239000000758 substrate Substances 0.000 claims abstract description 22
- 238000007373 indentation Methods 0.000 claims abstract description 16
- 239000000203 mixture Substances 0.000 claims description 13
- 239000003431 cross linking reagent Substances 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 11
- 229920001225 polyester resin Polymers 0.000 claims description 6
- 239000004645 polyester resin Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 5
- 230000009477 glass transition Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 3
- 125000004069 aziridinyl group Chemical group 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 78
- 239000002344 surface layer Substances 0.000 abstract 3
- -1 polyethylene terephthalate Polymers 0.000 description 16
- 239000000463 material Substances 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 8
- 238000000576 coating method Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 239000007787 solid Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 238000000859 sublimation Methods 0.000 description 7
- 230000008022 sublimation Effects 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 6
- 239000005020 polyethylene terephthalate Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000004743 Polypropylene Substances 0.000 description 5
- 229920000728 polyester Polymers 0.000 description 5
- 229920001155 polypropylene Polymers 0.000 description 5
- NOWKCMXCCJGMRR-UHFFFAOYSA-N Aziridine Chemical compound C1CN1 NOWKCMXCCJGMRR-UHFFFAOYSA-N 0.000 description 4
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 4
- 239000011254 layer-forming composition Substances 0.000 description 4
- 229920002799 BoPET Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 229920006243 acrylic copolymer Polymers 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- IMSODMZESSGVBE-UHFFFAOYSA-N 2-Oxazoline Chemical compound C1CN=CO1 IMSODMZESSGVBE-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 150000001541 aziridines Chemical class 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 150000001718 carbodiimides Chemical class 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000007541 indentation hardness test Methods 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
- 150000002513 isocyanates Chemical class 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
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- 229920000642 polymer Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
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- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
本発明はサーマルヘッド等を介して昇華性染料を熱転写することにより画像を記録するために用いられる熱転写受像シートに関する。 The present invention relates to a thermal transfer image-receiving sheet used for recording an image by thermally transferring a sublimable dye via a thermal head or the like.
デジタルカメラ等で撮影した画像を印刷する方式としては、インクジェット方式、昇華転写記録方式が主流である。昇華転写記録方式はインクジェット方式と比して階調表現に優れるという利点がある。 As a method for printing an image taken with a digital camera or the like, an inkjet method or a sublimation transfer recording method is mainly used. The sublimation transfer recording method has an advantage of excellent gradation expression as compared with the ink jet method.
昇華転写記録方式においては、基材上に例えばシアン、マゼンダ、イエローの熱昇華性染料層を形成した熱転写シートと、基材上に熱昇華性染料を受容し得る受容層を形成した熱転写受像シートとを対向して重ね合わせ、サーマルヘッドを熱転写シートの染料層を形成していない側に接触させ、画像情報に応じて熱をかけ各昇華性染料を熱転写受像シートに所定量移行させることにより画像を形成する。サーマルヘッドに印加する熱量に応じて染料の転写量を細かく制御することができるため、階調表現に優れた画像を得ることが可能である。 In the sublimation transfer recording method, for example, a thermal transfer sheet in which a cyan, magenta, and yellow thermal sublimation dye layer is formed on a substrate, and a thermal transfer image receiving sheet in which a reception layer capable of receiving the thermal sublimation dye is formed on the substrate. The thermal head is brought into contact with the side of the thermal transfer sheet where the dye layer is not formed, heat is applied according to the image information, and each sublimation dye is transferred to the thermal transfer image-receiving sheet by a predetermined amount. Form. Since the amount of dye transferred can be finely controlled in accordance with the amount of heat applied to the thermal head, it is possible to obtain an image excellent in gradation expression.
熱転写受像シートは、基材上に少なくとも熱昇華性染料を受容し得る受容層を設けたものである。熱転写受像シートの基材として一般的な合成紙を用いた場合、コシの弱さと耐熱性不足が問題となる。とりわけ耐熱性不足はカール、シワ等の品質不良を引き起こし大きな問題となっていた。 The thermal transfer image-receiving sheet is provided with a receiving layer capable of receiving at least a heat-sublimable dye on a substrate. When general synthetic paper is used as the base material of the thermal transfer image-receiving sheet, weakness and insufficient heat resistance become problems. In particular, the lack of heat resistance has caused serious problems such as curling and wrinkling, and has become a major problem.
こうした課題を解決するために、例えば特許文献1には比較的安価で熱収縮率が小さいポリエチレンテレフタレートを主成分として含む背面フィルム層を用いる提案がなされている。 In order to solve such problems, for example, Patent Document 1 proposes to use a back film layer containing polyethylene terephthalate as a main component that is relatively inexpensive and has a small heat shrinkage rate.
一方、熱転写受像シートの受容層側ともう一方の側に搬送性、裏面筆記性、糊付け性、バックプリント適性等を付与するために背面層が設けられる場合がある(例えば特許文献2〜5参照)。
On the other hand, a back layer may be provided on the receiving layer side and the other side of the thermal transfer image receiving sheet in order to impart transportability, backside writing property, gluing property, backprint suitability, etc. (see, for example,
上記特許文献2〜5は基材として用いた合成紙上に直接背面層を形成したものであり、基材と背面層の間に背面フィルム層を設けた場合については言及されていない。本発明者らが検討したところ、基材、背面フィルム層、背面層をこの順に積層した熱転写受像シートにおいては、紙送りローラを具備する記録装置に用いた際に紙送り量のズレに起因する染料インクの付着位置ズレが発生することが分かった。インクの付着位置ズレは印画品質を著しく損なうため、解決が急務となっていた。
In
本発明は係る事情を鑑みてなされたものであり、基材、背面フィルム層、背面層をこの順に積層した熱転写受像シートにおいて、インクの付着位置ズレを生じない、優れた印画品質を達成するものである。 SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and achieves excellent print quality that does not cause misalignment of ink adhesion in a thermal transfer image-receiving sheet in which a substrate, a back film layer, and a back layer are laminated in this order. It is.
本発明者らは鋭意検討を重ねた結果、基材の一方の面に染料受容層、他方の面に樹脂層、背面層が順次積層されてなる熱転写受像シートにおいて、熱転写時のインクの付着位置ズレを防止するためには、樹脂層の剥離強度及び背面層の押し込み硬度を制御することが重要であることを見出し、本発明を完成させた。 As a result of intensive studies, the present inventors have found that, in a thermal transfer image receiving sheet in which a dye receiving layer is laminated on one side of a substrate, a resin layer on the other side, and a back layer are sequentially laminated, the ink adhesion position during thermal transfer In order to prevent misalignment, it was found important to control the peel strength of the resin layer and the indentation hardness of the back layer, and the present invention was completed.
本発明は以下のものにより構成される。 The present invention is constituted by the following.
(1)基材の一方の面に染料受容層、他方の面に樹脂層と背面層とが順次積層された熱転写受像シートであって、
前記基材と前記樹脂層との剥離強度が4N以上であり、
前記背面層側からの押し込み硬度が0.3GPa以上であることを特徴とする熱転写受像シートである。
(1) A thermal transfer image receiving sheet in which a dye receiving layer is laminated on one side of a substrate and a resin layer and a back layer are sequentially laminated on the other side,
The peel strength between the substrate and the resin layer is 4N or more,
A thermal transfer image receiving sheet, wherein the indentation hardness from the back layer side is 0.3 GPa or more.
(2)前記背面層は少なくともバインダ樹脂と架橋剤とを含有する組成物から形成されることを特徴とする(1)に記載の熱転写受像シートである。 (2) The thermal transfer image receiving sheet according to (1), wherein the back layer is formed of a composition containing at least a binder resin and a crosslinking agent.
(3)前記架橋剤がアジリジン系化合物であることを特徴とする(2)に記載の熱転写受像シートである。 (3) The thermal transfer image-receiving sheet as described in (2), wherein the crosslinking agent is an aziridine compound.
(4)前記バインダ樹脂がガラス転移温度60℃以上のポリエステル樹脂からなることを特徴とする(2)または(3)に記載の熱転写受像シートである。 (4) The thermal transfer image-receiving sheet according to (2) or (3), wherein the binder resin is made of a polyester resin having a glass transition temperature of 60 ° C. or higher.
(5)前記組成物がディスパージョンからなることを特徴とする(2)〜(4)のいずれかに記載の熱転写受像シートである。 (5) The thermal transfer image-receiving sheet according to any one of (2) to (4), wherein the composition comprises a dispersion.
本発明の(1)に記載の構成によれば、基材の他方の面に樹脂層と背面層とを順次積層してなる熱転写受像シートにおいて、前記基材と前記樹脂層との剥離強度を4N以上とすることにより、熱転写受像シートがプリンタに具備された送りローラで搬送される際に、基材と樹脂層との層間の結着の弱さに起因するズレの発生を防ぐことができる。また、さらに前記背面層側からの押し込み硬度を0.3GPa以上とすることにより、送りローラとの接点でのロール圧による表面変形を防ぐことができ、印画時のズレによる印画品質の低下を抑制することができる。 According to the configuration described in (1) of the present invention, in the thermal transfer image receiving sheet formed by sequentially laminating the resin layer and the back layer on the other surface of the substrate, the peel strength between the substrate and the resin layer is By setting it to 4N or more, when the thermal transfer image-receiving sheet is conveyed by the feed roller provided in the printer, it is possible to prevent the occurrence of deviation due to weak bonding between the base material and the resin layer. . Furthermore, by setting the indentation hardness from the back layer side to 0.3 GPa or more, surface deformation due to roll pressure at the contact point with the feed roller can be prevented, and deterioration of print quality due to misalignment during printing is suppressed. can do.
(2)に記載の構成によれば、前記背面層をバインダ樹脂と架橋剤とを含有する組成物から形成することで、架橋密度の高い背面層を形成することができる。その結果、背面層の表面硬度が向上し、送りローラとの接点でのロール圧による表面変形を防ぐことができ、印画時のズレによる印画品質の低下を抑制することができる。 According to the configuration described in (2), the back layer having a high crosslinking density can be formed by forming the back layer from a composition containing a binder resin and a crosslinking agent. As a result, the surface hardness of the back layer is improved, surface deformation due to roll pressure at the contact point with the feed roller can be prevented, and deterioration in print quality due to deviation during printing can be suppressed.
(3)に記載の構成によれば、前記架橋剤にポットライフや反応性に優れたアジリジン系化合物を用いることで、より効率的に架橋密度を高めることができ生産性が向上する。 According to the structure as described in (3), a crosslinking density can be raised more efficiently and productivity can be improved by using the aziridine type compound excellent in pot life and reactivity for the crosslinking agent.
(4)に記載の構成によれば、前記バインダ樹脂がガラス転移温度60℃以上のポリエステル樹脂からなることで、前記背面層側からの押し込み硬度を0.3GPa以上とすることにより、送りローラとの接点でのロール圧による表面変形を防ぐことができ、印画時
のズレによる印画品質の低下を抑制することができる。
According to the configuration described in (4), when the binder resin is made of a polyester resin having a glass transition temperature of 60 ° C. or higher, the indentation hardness from the back layer side is 0.3 GPa or higher, Therefore, it is possible to prevent surface deformation due to roll pressure at the contact point, and to suppress deterioration in print quality due to deviation during printing.
(5)に記載の構成によれば、前記組成物がディスパージョンからなることにより環境負荷の少ない製造方法で熱転写受像シートを得ることができる。 According to the structure as described in (5), a thermal transfer image receiving sheet can be obtained with a manufacturing method with little environmental impact because the said composition consists of a dispersion.
このように本発明の熱転写受像シートを用いることにより、インクの付着位置ズレが生じない、高品質な画像を得ることが可能である。 As described above, by using the thermal transfer image receiving sheet of the present invention, it is possible to obtain a high-quality image that does not cause displacement of the ink adhesion position.
本発明の詳細な内容を以下に説明する。 The detailed contents of the present invention will be described below.
図1に示すように、本発明は基材2の一方の面に染料受容層3、他方の面に樹脂層4と背面層5とが順次積層された熱転写受像シート1であり、特に基材1と樹脂層4との剥離強度が4N以上で、背面層5側からの押し込み硬度が0.3GPa以上であることを特徴とする熱転写受像シート1である。
As shown in FIG. 1, the present invention is a thermal transfer image-receiving sheet 1 in which a dye-receiving layer 3 is laminated on one surface of a
(基材)
基材1としては上質紙、コート紙、各種合成紙、レジンコート紙等を適宜用いることが可能である。とりわけ、セルロース繊維紙の表裏をポリエチレンやポリプロピレン樹脂で被覆したレジンコート紙は白色度、光沢度に優れるため好適に用いられる。
(Base material)
As the substrate 1, high-quality paper, coated paper, various synthetic papers, resin-coated paper, and the like can be used as appropriate. In particular, resin-coated paper in which the front and back surfaces of cellulose fiber paper are coated with polyethylene or polypropylene resin is excellent in whiteness and gloss, and thus is preferably used.
(樹脂層)
上記で説明したように熱転写受像シート1の裏面、すなわち基材1の裏面に直接積層する樹脂層4は、熱転写時の熱圧に起因する搬送のズレを抑制するためのものであり、基材1との強い密着性(強い剥離強度)と耐熱性(特に寸法安定性や平滑性等)が要求される。剥離強度は強いほど良いが、4N以上の強度を有するものが好ましい。
(Resin layer)
As described above, the
例えば、樹脂層4としてポリエチレンテレフタレート(PET)フィルムを用いた場合、紙基材との間に押出ラミネーターを用いてポリエチレンやポリプロピレン樹脂を300℃程度の高温で押出し、紙基材と溶融積層させることで4N以上の強度を有することができる。またこの溶融押出しに際しては、基材(紙基材とポリエチレンまたはポリポロピレンとの積層体)との十分な剥離強度を保つために、PETフィルムとしては易接着処理もしくはコロナ処理されたものを用いることが好ましい。とりわけ易接着処理を施したPETフィルムは高い剥離強度を有するため好適に用いられる。
For example, when a polyethylene terephthalate (PET) film is used as the
(背面層)
本発明に係る背面層は樹脂層の上に形成され、押し込み硬度が0.3GPa以上であることを特徴とし、少なくともバインダ樹脂と架橋剤を含有する組成物からなる。前記背面層の押し込み硬度を0.3GPa以上とすることにより、送りローラとの接点でのロール圧による表面変形を防ぐことができ、印画時のズレによる印画品質の低下を抑制することができる。前記組成物は水系、溶剤系の塗布液として用いることが可能であるが、環境負荷の少ない水系塗布液が好ましく用いられる。
(Back layer)
The back layer according to the present invention is formed on a resin layer, has an indentation hardness of 0.3 GPa or more, and comprises a composition containing at least a binder resin and a crosslinking agent. By setting the indentation hardness of the back layer to 0.3 GPa or more, it is possible to prevent surface deformation due to roll pressure at the contact point with the feed roller, and it is possible to suppress a decrease in print quality due to deviation during printing. The composition can be used as a water-based or solvent-based coating solution, but a water-based coating solution having a low environmental load is preferably used.
押し込み硬度0.3GPa以上を得るために、バインダ樹脂としてはガラス転移温度が60℃以上のポリエステル樹脂が好ましく、また、架橋剤としてはイソシアネート系、オキサゾリン系、カルボジイミド系、アジリジン系を用いることができるが、中でもポットライフ、反応性に優れたアジリジン系化合物が好適に用いられる。例えば、60℃以上の
ポリエステル樹脂としてはMD−1200(東洋紡社製)等が、また、アジリジン系架橋剤としては、PZ−33(日本触媒社製)等が挙げられる。
In order to obtain an indentation hardness of 0.3 GPa or more, the binder resin is preferably a polyester resin having a glass transition temperature of 60 ° C. or more, and the crosslinking agent may be an isocyanate, oxazoline, carbodiimide, or aziridine. However, among them, an aziridine compound excellent in pot life and reactivity is preferably used. For example, as a polyester resin at 60 ° C. or higher, MD-1200 (manufactured by Toyobo Co., Ltd.) and the like, and as an aziridine-based cross-linking agent, PZ-33 (manufactured by Nippon Shokubai Co., Ltd.) can be mentioned.
また、背面層にはブロッキング性、インキ定着性を向上させるために各種フィラーを併用することが可能である。例えば、フィラーとしてはゲル法シリカ、コロイダルシリカ、更には高分子フィラー等を適宜用いることが可能である。 In addition, various fillers can be used in combination with the back layer in order to improve blocking properties and ink fixing properties. For example, as the filler, gel method silica, colloidal silica, polymer filler or the like can be used as appropriate.
(染料受容層)
本発明の熱転写受像シートにおいては、基材1の一方の面に昇華性染料を受容する染料受容層3が形成される。染料受容層は、例えばバインダ樹脂と離型剤を含有する塗布液を用いて形成される。受容層のバインダ樹脂としてはアクリル系樹脂、塩化ビニル系樹脂、ポリエステル系樹脂等を適宜用いることが可能であるが、染料受容性と離型性のバランスに優れた塩化ビニル・アクリル共重合体もしくは塩化ビニル・酢酸ビニル共重合体が好適に用いられる。
(Dye-receiving layer)
In the thermal transfer image receiving sheet of the present invention, a dye receiving layer 3 for receiving a sublimable dye is formed on one surface of the substrate 1. The dye receiving layer is formed using a coating liquid containing, for example, a binder resin and a release agent. As the binder resin for the receiving layer, an acrylic resin, a vinyl chloride resin, a polyester resin, or the like can be used as appropriate, but a vinyl chloride / acrylic copolymer having an excellent balance between dye acceptability and releasability or A vinyl chloride / vinyl acetate copolymer is preferably used.
受容層塗布液に用いる離型剤としては、シリコーンオイル、フッ素系化合物、リン酸エステル系化合物等を適宜用いることが可能である。本発明の水系塗布液においてはポリエーテル変性したシリコーンオイルがより好適に用いられる。 As the release agent used in the receiving layer coating solution, silicone oil, fluorine-based compounds, phosphate ester-based compounds, and the like can be appropriately used. In the aqueous coating solution of the present invention, polyether-modified silicone oil is more preferably used.
本発明の熱転写受像シートにおいて、染料転写時の熱により基材がダメージを受けることを避けるため、基材と染料受容層の間に中間層を設けることが可能である。中間層としてはバインダ樹脂に中空粒子を分散させたもの、あるいは発泡処理を施した高分子膜、例えば発泡ポリプロピレン等が好適に用いられる。 In the thermal transfer image receiving sheet of the present invention, an intermediate layer can be provided between the base material and the dye receiving layer in order to avoid damage to the base material due to heat during dye transfer. As the intermediate layer, a binder resin in which hollow particles are dispersed, or a polymer film subjected to foaming treatment, such as foamed polypropylene, is preferably used.
以下、実施例等を挙げて本発明をさらに詳細に説明するが、本発明はこれらの実施例に限定されるものではない。 EXAMPLES Hereinafter, although an Example etc. are given and this invention is demonstrated further in detail, this invention is not limited to these Examples.
<実施例1>
紙基材の一方の面にポリプロピレンで被覆した積層体の他方の面と、樹脂層として易接着ポリエチレンテレフタレート(東レ社製「ルミラーU34」)とを、押出し機(エクストルーダー)にてポリプロピレンを押出し積層した。なお、押出し加工条件は、加工速度50m/mim、樹脂温度320℃であった。
<Example 1>
The other side of the laminate covered with polypropylene on one side of the paper substrate and easy-adhesive polyethylene terephthalate ("Lumirror U34" manufactured by Toray Industries, Inc.) as a resin layer are extruded with an extruder. Laminated. The extrusion conditions were a processing speed of 50 m / mim and a resin temperature of 320 ° C.
次に上記樹脂層の上に、下記組成の背面層形成用組成物を乾燥後の塗布量が1.0g/cm2になるようにグラビアコーターで塗布し、90℃で1分間乾燥させて背面層を形成した。
なお、ポリエステル系ディスパージョンに含まれるポリエステルのガラス転移温度は67℃である。
[背面層形成用組成物:固形分27%]
・ポリエステル系ディスパージョン: 100g
(東洋紡社製「MD‐1200」、固形分34%)
・アジリジン系架橋剤(日本触媒社製「PZ‐33」): 1.7g
・純水: 30.5g
Next, on the resin layer, a back layer forming composition having the following composition was applied with a gravure coater so that the coating amount after drying was 1.0 g / cm 2 and dried at 90 ° C. for 1 minute. A layer was formed.
The glass transition temperature of the polyester contained in the polyester dispersion is 67 ° C.
[Back layer forming composition: solid content 27%]
・ Polyester dispersion: 100g
(Toyobo "MD-1200", solid content 34%)
・ Aziridine-based crosslinking agent (“PZ-33” manufactured by Nippon Shokubai Co., Ltd.): 1.7 g
・ Pure water: 30.5g
次に上記基材の他方の面をコロナ処理した後、その上面に下記組成の染料受容層形成用組成物をもちいて、乾燥後の塗布量が2.0g/cm2になるようにグラビアコーターで塗布し、90℃で1分間乾燥させて染料受容層を形成して熱転写受像シートを作製した。
[染料受容層形成用組成物:固形分27%]
・塩化ビニル・アクリル共重合体: 100g
(日信化学社製「ビニブラン701」、固形分30%)
・ポリエーテル変性シリコーンオイル: 3.0g
(信越化学社製「KF‐354L」)
・純水: 19.2g
Next, after corona-treating the other surface of the substrate, a gravure coater is used by using a composition for forming a dye-receiving layer having the following composition on the upper surface so that the coating amount after drying is 2.0 g / cm 2. And dried at 90 ° C. for 1 minute to form a dye-receiving layer to produce a thermal transfer image-receiving sheet.
[Dye-receiving layer forming composition: solid content 27%]
・ Vinyl chloride / acrylic copolymer: 100g
(Nishin Chemical's “ViniBran 701”, solid content 30%)
・ Polyether-modified silicone oil: 3.0g
("KF-354L" manufactured by Shin-Etsu Chemical Co., Ltd.)
・ Pure water: 19.2g
<実施例2>
樹脂層としてコロナ処理ポリエチレンテレフタレート(東レ社製「ルミラーS105」を用いたこと以外は実施例1と同様にして熱転写受像シートを作製した。
<Example 2>
A thermal transfer image-receiving sheet was produced in the same manner as in Example 1 except that corona-treated polyethylene terephthalate ("Lumirror S105" manufactured by Toray Industries, Inc.) was used as the resin layer.
<実施例3>
背面層の乾燥後の塗布量が2.0g/cm2としたこと以外は実施例1と同様にして熱転写受像シートを作製した。
<Example 3>
A thermal transfer image receiving sheet was produced in the same manner as in Example 1 except that the coating amount after drying the back layer was 2.0 g / cm 2 .
<実施例4>
下記の背面層形成用組成物を用いた以外は実施例1と同様にして熱転写受像シートを作製した。
[背面層形成用組成物]
・ポリエステル系エマルジョン: 100g
(東洋紡社製「MD‐1200」、固形分34%)
・アジリジン系架橋剤(日本触媒社製「PZ‐33」): 1.7g
・コロイダルシリカ: 85g
(ADEKA社製「AT−50」、固形分40%)
・純水 71.4g
<Example 4>
A thermal transfer image receiving sheet was produced in the same manner as in Example 1 except that the following composition for forming the back layer was used.
[Back layer forming composition]
・ Polyester emulsion: 100g
(Toyobo "MD-1200", solid content 34%)
・ Aziridine-based crosslinking agent (“PZ-33” manufactured by Nippon Shokubai Co., Ltd.): 1.7 g
・ Colloidal silica: 85g
(Adeka "AT-50", solid content 40%)
・ Pure water 71.4g
<比較例1>
樹脂層として標準グレードのポリエチレンテレフタレート(東レ社製「ルミラーS10」)を用いた以外は実施例1と同様にして熱転写受像シートを作製した。
<Comparative Example 1>
A thermal transfer image-receiving sheet was prepared in the same manner as in Example 1 except that standard grade polyethylene terephthalate (“Lumirror S10” manufactured by Toray Industries, Inc.) was used as the resin layer.
<比較例2>
下記の背面層形成用組成物を用いた以外は実施例1と同様にして熱転写受像シートを作製した。
ポリエステル系エマルジョン(東洋紡社製「MD‐1200」、固形分34%)100g
純水25.9g
<Comparative example 2>
A thermal transfer image receiving sheet was produced in the same manner as in Example 1 except that the following composition for forming the back layer was used.
100g of polyester emulsion (Toyobo "MD-1200", solid content 34%)
25.9g of pure water
<評価>
実施例1〜4及び比較例1〜2で得られた熱転写受像シートを用いて、剥離強度、押し込み硬度、印画の測定、評価を以下の方法にて行った。結果は以下の表1に記す。
<Evaluation>
Using the thermal transfer image-receiving sheets obtained in Examples 1 to 4 and Comparative Examples 1 and 2, peel strength, indentation hardness, measurement of printing, and evaluation were performed by the following methods. The results are shown in Table 1 below.
(剥離強度評価)
引張強度試験機(島津製作所社製「EZ‐LX」)を用い、試験速度1000mm/mimにて剥離試験を行い背面フィルム層の剥離強度を調べた。
(Peel strength evaluation)
Using a tensile strength tester (“EZ-LX” manufactured by Shimadzu Corporation), a peel test was conducted at a test speed of 1000 mm / mim to examine the peel strength of the back film layer.
(押し込み硬度評価)
押し込み硬度試験機(MTS社製「ナノインデンターDCM」)にバーコビッチ圧子を装着し、背面層の押し込み硬度試験を行った。深さ800nmの硬度から押し込み硬度を算出した。
(Indentation hardness evaluation)
A Barcovic indenter was attached to an indentation hardness tester (“Nanoindenter DCM” manufactured by MTS), and an indentation hardness test of the back layer was performed. The indentation hardness was calculated from the hardness at a depth of 800 nm.
(印画評価)
熱転写昇華型プリンタを40℃80%RHの恒温恒湿槽に設置し、グレーベタ画像を10枚連続で印画した。色ズレが1枚も発生しなかったものを〇、1枚以上発生したものを×とした。
(Print evaluation)
The thermal transfer sublimation type printer was installed in a constant temperature and humidity chamber at 40 ° C. and 80% RH, and 10 gray solid images were continuously printed. A case where no color misregistration occurred and a case where one or more color misregistration occurred were marked as x.
<比較評価結果>
実施例1〜4で得られた本発明の熱転写受像シートは、いずれも基材と樹脂層との剥離強度が4N以上であり、かつ、背面層の押し込み強度が0.3GPa以上を示し、色ズレ発生のない良好な印画特性が得られた。一方、比較例1で得られた比較例品は、標準の未処理PETフィルムを用いた為に剥離強度が2.0Nと低く、また、比較例2で得られた比較例品は背面層に架橋剤を用いないことから背面層の押し込み強度が0.23GPaと低く、印画時に色ズレが発生した。
<Comparison evaluation result>
In the thermal transfer image-receiving sheets of the present invention obtained in Examples 1 to 4, the peel strength between the substrate and the resin layer is 4 N or more, and the indentation strength of the back layer is 0.3 GPa or more. Good printing characteristics with no deviation were obtained. On the other hand, the comparative product obtained in Comparative Example 1 has a low peel strength of 2.0 N because a standard untreated PET film is used, and the comparative product obtained in Comparative Example 2 is a back layer. Since the crosslinking agent was not used, the indentation strength of the back layer was as low as 0.23 GPa, and color misregistration occurred during printing.
1・・・熱転写受像シート
2・・・基材
3・・・染料受容層
4・・・樹脂層
5・・・背面層
DESCRIPTION OF SYMBOLS 1 ... Thermal transfer
Claims (5)
前記基材と前記樹脂層との剥離強度が4N以上であり、
前記背面層側からの押し込み硬度が0.3GPa以上であることを特徴とする熱転写受像シート。 A thermal transfer image-receiving sheet in which a receiving layer is laminated on one surface of a substrate, and a resin layer and a back layer are sequentially laminated on the other surface,
The peel strength between the substrate and the resin layer is 4N or more,
The thermal transfer image-receiving sheet, wherein the indentation hardness from the back layer side is 0.3 GPa or more.
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JP2018118389A (en) * | 2017-01-23 | 2018-08-02 | 凸版印刷株式会社 | Thermal transfer image receiving sheet |
JP2019030992A (en) * | 2017-08-07 | 2019-02-28 | 凸版印刷株式会社 | Thermal transfer image-receiving sheet |
JP2019043051A (en) * | 2017-09-04 | 2019-03-22 | 凸版印刷株式会社 | Thermal transfer image receiving sheet and method for producing the same |
JP2019043077A (en) * | 2017-09-05 | 2019-03-22 | 凸版印刷株式会社 | Thermal transfer image receiving sheet and method for producing the same |
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