JP2653549B2 - Thermal transfer recording medium - Google Patents
Thermal transfer recording mediumInfo
- Publication number
- JP2653549B2 JP2653549B2 JP2297247A JP29724790A JP2653549B2 JP 2653549 B2 JP2653549 B2 JP 2653549B2 JP 2297247 A JP2297247 A JP 2297247A JP 29724790 A JP29724790 A JP 29724790A JP 2653549 B2 JP2653549 B2 JP 2653549B2
- Authority
- JP
- Japan
- Prior art keywords
- thermal transfer
- layer
- transfer layer
- porous silica
- recording medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Thermal Transfer Or Thermal Recording In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ワープロ、ファクシミリ、バーコード等の
サーマルヘッドを用いた感熱転写記録装置に使用する熱
転写記録媒体の改良に関する。The present invention relates to an improvement in a thermal transfer recording medium used in a thermal transfer recording apparatus using a thermal head such as a word processor, a facsimile, and a bar code.
更に詳しくは、平滑度の低い紙へのカバーラップ性
や、ドットの再現性等の高い熱感度性を保持しながら、
高温、長期保存の際に熱転写層の成分が支持体裏面に移
行するのを防止し、保存安定性を良好にすることによ
り、印字上、走行上のトラブルが防止された熱転写記録
媒体に関する。More specifically, while maintaining high thermal sensitivity such as cover wrapping property on paper with low smoothness and dot reproducibility,
The present invention relates to a thermal transfer recording medium in which printing and running troubles are prevented by preventing the components of the thermal transfer layer from migrating to the back surface of the support during long-term storage at high temperature and improving storage stability.
従来、ワープロやファクシミリ、バーコード等の熱転
写方式によって、平滑度の低い紙へ出力プリントする場
合、熱転写記録媒体の構造としては、支持体の一方の面
(以下裏面とする)にスティキング防止を目的とした耐
熱保護層を設け、支持体の他方の面(以下表面とする)
に着色層である第1熱転写層を設け、さらにその上に低
平滑紙への印字性向上や接着性向上を目的とした熱可塑
性樹脂からなる第2熱転写層(最外層)を設ける構造が
一般的である。このような構造の熱転写記録媒体は、低
平滑紙への良好な印字を得るために、第2熱転写層であ
る最外層の熱可塑性樹脂の軟化点の低い樹脂を使用する
必要がある。Conventionally, when performing output printing on low-smoothness paper by a thermal transfer method such as a word processor, facsimile, or bar code, the structure of the thermal transfer recording medium is to prevent sticking on one surface (hereinafter referred to as the back surface) of the support. Provide the intended heat-resistant protective layer, and the other side of the support (hereinafter referred to as the surface)
A first thermal transfer layer, which is a colored layer, and a second thermal transfer layer (outermost layer) made of a thermoplastic resin for the purpose of improving printability on low-smooth paper and improving adhesiveness. It is a target. In the thermal transfer recording medium having such a structure, it is necessary to use a resin having a low softening point of the outermost thermoplastic resin serving as the second thermal transfer layer in order to obtain good printing on low smooth paper.
しかし、このような構成の熱転写記録媒体はロール状
態での高温保存や長期保存において、裏面の耐熱保護層
側へ、熱転写層の成分の移行が発生し、カバーラップ性
の低下による低平滑紙への印字品位の劣化、サーマルヘ
ッドのヘッド汚れによる印字品位低下、スティック現象
の発生、カセット内でのリボンの走行上のトラブルの発
生などの問題点が生じていた。However, in the thermal transfer recording medium having such a configuration, during high-temperature storage in a roll state or long-term storage, the components of the thermal transfer layer migrate to the heat-resistant protective layer side on the back surface, and the heat-transfer recording medium becomes a low-smooth paper due to a decrease in cover wrapping property. However, problems such as deterioration of print quality, deterioration of print quality due to thermal head dirt, occurrence of stick phenomenon, and occurrence of trouble in running the ribbon in the cassette have occurred.
すなわち、このような構造の熱転写記録媒体では、高
温及び長期保存等の保存性と、低平滑紙へのカバーラッ
プ性やドットの再現性といった印字性の面で両立できな
いという課題があった。That is, in the thermal transfer recording medium having such a structure, there is a problem that storability such as high temperature and long-term storage cannot be compatible with printability such as cover wrapping property on low smooth paper and dot reproducibility.
本発明の目的は、高温及び長期保存時に支持体裏面の
耐熱保護層側へ熱転写層の成分の移行を防止し、かつ低
平滑紙に対しても良好な印字品位が得られる熱転写記録
媒体を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a thermal transfer recording medium which prevents the components of the thermal transfer layer from migrating to the heat-resistant protective layer side on the back surface of the support during high-temperature and long-term storage, and provides good print quality even on low-smooth paper. Is to do.
本発明者等は、前記の課題を解決するため鋭意研究を
行った結果、1層以上からなる熱転写層の最外層に、比
表面積がB.E.T.法でS(m2/g)、平均粒子径をDμmφ
とした時、S/Dm/gが100×106m/g>S/D>60×106m/gの範
囲にある球状多孔質シリカを含有し、かつ該多孔質シリ
カ粒子の平均粒子径を該最外層の第2熱転写層の厚さよ
り大きくすること更に基本的に300℃以下では熱溶融及
び熱軟化しない多孔質シリカ粒子を0.5〜50.0重量%含
有させることが非常に有効であることを見いだした。つ
まり、熱転写層の最外層中に最外層の層厚よりも大きい
平均粒子径をもつ球状多孔質シリカ粒子を含有させるこ
とにより、熱転写層の最外層と支持体裏面の耐熱保護層
側との直接接触を完全に防止し、高温及び長期保存時に
熱転写層の成分が支持体裏面の耐熱保護層側へ移行する
のを防止することができるのである。The present inventors have conducted intensive studies to solve the above-mentioned problems. As a result, the outermost layer of one or more thermal transfer layers has a specific surface area of S (m 2 / g) by the BET method and an average particle size of Dμmφ
S / Dm / g contains spherical porous silica in the range of 100 × 10 6 m / g> S / D> 60 × 10 6 m / g, and the average particle size of the porous silica particles The diameter should be larger than the thickness of the outermost second thermal transfer layer. Furthermore, it is very effective to contain 0.5 to 50.0% by weight of porous silica particles which do not melt or soften at 300 ° C or lower. Was found. In other words, by including spherical porous silica particles having an average particle diameter larger than the thickness of the outermost layer in the outermost layer of the thermal transfer layer, direct contact between the outermost layer of the thermal transfer layer and the heat-resistant protective layer side of the back surface of the support is possible. The contact can be completely prevented, and the components of the thermal transfer layer can be prevented from migrating to the heat-resistant protective layer on the back surface of the support during high-temperature and long-term storage.
更に、球状シリカ粒子の比表面積S(m2/g)と粒子径
(μm)を100×106m/g>S/D>60×106m/gの範囲になる
比表面積粒子径を有する球状多孔質シリカを選択するこ
とによって、この多孔質によってシリカ粒子が熱転写層
の最外層にアンカーリングされ、ロール状態における耐
熱保護層との擦れやカセット内での走行時においても多
孔質シリカ粒子が熱転写の最外層から擦りとられること
がなく高温及び長期保存後においても安定した印字品位
やカセット内でのリボンの走行安定が保持される。Further, the specific surface area S (m 2 / g) and the particle diameter (μm) of the spherical silica particles are set to 100 × 10 6 m / g> S / D> 60 × 10 6 m / g. By selecting the spherical porous silica having the porous silica particles, the silica particles are anchored to the outermost layer of the thermal transfer layer by this porosity, and the porous silica particles can be rubbed with the heat-resistant protective layer in a roll state or even when running in a cassette. Is not scraped off from the outermost layer of the thermal transfer, and stable printing quality and stable running of the ribbon in the cassette are maintained even at high temperatures and after long-term storage.
以上、熱転写層の最外層中に層厚よりも大きい平均粒
子径をもつ球状多孔質シリカ粒子を含有させることによ
り、前記の課題を解決しうることを見いだし、本発明を
完成した。As described above, it has been found that the above problems can be solved by including spherical porous silica particles having an average particle diameter larger than the layer thickness in the outermost layer of the thermal transfer layer, and the present invention has been completed.
すなわち、本発明の熱転写記録媒体は、支持体の表面
に熱溶融性インクからなる第1熱転写層と、その上に熱
可塑性樹脂と多孔質シリカ粒子の複合体よりなる第2熱
転写層を設けてなる熱転写記録媒体において、最外層の
第2熱転写層に平均粒子径Dμm、比表面積Sm2/gの球
状多孔質シリカであって、S/Dm/gが100×106m/g>S/D>
60×106m/gの範囲にある多孔質シリカ粒子を含有し且つ
該最外層の層厚よりも大きい粒子径を持つ球状多孔質シ
リカ粒子が含まれていることを特徴とする。That is, the thermal transfer recording medium of the present invention is provided with a first thermal transfer layer made of a hot-melt ink on the surface of a support, and a second thermal transfer layer made of a composite of a thermoplastic resin and porous silica particles provided thereon. Wherein the outermost second thermal transfer layer is a spherical porous silica having an average particle diameter of D μm and a specific surface area of Sm 2 / g, wherein S / Dm / g is 100 × 10 6 m / g> S / D>
It is characterized by containing porous silica particles in the range of 60 × 10 6 m / g and containing spherical porous silica particles having a particle diameter larger than the thickness of the outermost layer.
ここで、本発明の熱転写記録媒体の熱転写層を二層に
した場合の断面を拡大して示した第1図に基づいて説明
する。Here, a description will be given based on FIG. 1 which shows an enlarged cross section of the thermal transfer recording medium of the present invention in which the thermal transfer layer has two layers.
支持体: 支持体の基材として2〜20μmの厚さのポリエステ
ル、ポリカーボネート、ポリイミド等の比較的耐熱性に
優れるプラスチックフィルム、セロファン、紙等が使用
できる。必要に応じてサーマルヘッドと接する面にシリ
コン変性ポリマー系又はフッ素系ポリマーからなる耐熱
保護層やスティック防止層を設けても良い。Support: As a substrate of the support, a plastic film having relatively high heat resistance, such as polyester, polycarbonate, and polyimide having a thickness of 2 to 20 μm, cellophane, paper, and the like can be used. If necessary, a heat-resistant protective layer or a stick prevention layer made of a silicon-modified polymer or a fluorine-based polymer may be provided on the surface in contact with the thermal head.
第1熱転写層 第1熱転写層は着色剤、ビヒクル及び各種添加剤が加
わった熱溶融性インクからなる。着色剤としてはカーボ
ンブラック、有機顔料、染料等を単独又は複数使用する
ことができる。好ましくは十分な着色濃度を有し、光、
熱、温湿度、溶剤等により変退色しないものを選定する
と良い。ビヒクルとしては融点が45〜120℃のワックス
が主成分であり、パラフィンワックス、カルナバワック
ス、マイクロクリスタリンワックス、キャンデリラワッ
クス、ポリエチレンワックス、木猟、密猟、脂肪酸アミ
ド、脂肪酸エステル等から選定される一種又は二種以上
を用いるが、本発明では格別には限定しない。熱溶融性
インクには上記成分の他に、必要に応じて熱可塑性樹脂
からなる固着剤、分散剤、レベリング剤等の各種添加剤
を加えることができる。First Thermal Transfer Layer The first thermal transfer layer is made of a heat-meltable ink to which a coloring agent, a vehicle and various additives are added. As the colorant, carbon black, organic pigments, dyes and the like can be used alone or in combination. Preferably having a sufficient color density, light,
It is preferable to select one that does not discolor due to heat, temperature, humidity, solvent, and the like. The main component of the vehicle is a wax having a melting point of 45 to 120 ° C. A kind selected from paraffin wax, carnauba wax, microcrystalline wax, candelilla wax, polyethylene wax, wood hunting, poaching, fatty acid amide, fatty acid ester, etc. Alternatively, two or more types are used, but the present invention is not particularly limited. In addition to the above components, various additives such as a fixing agent, a dispersing agent, and a leveling agent made of a thermoplastic resin can be added to the hot-melt ink as needed.
第1熱転写層の組成及び厚さは必要な印字濃度と熱感
度によって決定されるが、厚さは0.1〜10.0μ、好まし
くは2.0〜5.0μが良い。The composition and thickness of the first thermal transfer layer are determined by the required printing density and thermal sensitivity, and the thickness is preferably 0.1 to 10.0 μm, and more preferably 2.0 to 5.0 μm.
最外層(第2転写層): 最外層は、樹脂と球状多孔質シリカ粒子の複合体より
なっている。Outermost layer (second transfer layer): The outermost layer is made of a composite of a resin and spherical porous silica particles.
樹脂は、軟化点が100℃前後の熱可塑性樹脂が使用さ
れ、低平滑紙へのカバーラップ性や要求される熱感度に
より1種または2種以上使用することができる。As the resin, a thermoplastic resin having a softening point of about 100 ° C. is used, and one or two or more kinds can be used depending on a cover wrapping property to a low smooth paper and a required thermal sensitivity.
熱可塑性樹脂としては、従来より感熱接着剤として用
いられているものをそのまま使用できる。特に限定はな
いが、例えばヒドロキシプロピルセルロース、エチルセ
ルロース、エチレンアクリル酸共重合体、アクリル樹
脂、ポリスチレン、ポリアミド、エチレン酢酸ビニル共
重合体、ポリビニルアルコール、ポリビニルピロリド
ン、石油樹脂、アルキル変性フェノール樹脂、ケトン樹
脂、ポリビニルブチラール等が、1種または2種以上混
合して使用される。As the thermoplastic resin, those conventionally used as heat-sensitive adhesives can be used as they are. Although not particularly limited, for example, hydroxypropyl cellulose, ethyl cellulose, ethylene acrylic acid copolymer, acrylic resin, polystyrene, polyamide, ethylene vinyl acetate copolymer, polyvinyl alcohol, polyvinyl pyrrolidone, petroleum resin, alkyl-modified phenol resin, ketone resin , Polyvinyl butyral and the like are used alone or in combination of two or more.
多孔質粒子は、比表面積がB.E.T.法でS(m2/g)、平
均粒子径をDμmとした時、S/Dm/gが100×106m/g>S/D
>60×106m/gの範囲にある球状多孔質粒子であって、平
均粒子径が0.1〜10.0μmの範囲内にあり、基本的に100
℃以下では熱溶融及び熱軟化しない多孔質シリカ粒子で
あり、必要に応じて1種又は2種以上使用することがで
きる。この多孔質シリカ粒子は、第2熱転写層(最外
層)の層厚よりも大きな平均粒子径を持つ必要がある。
多孔質シリカ粒子の平均粒子径が第2熱転写層(最外
層)の層厚よりも小さいと多孔質シリカ粒子が第2熱転
写層(最外層)中に埋もれてしまい第2熱転写層(最外
層)と支持体裏面の耐熱保護層側との直接接触を防止で
きず、特に、60℃以上での環境下で長時間保存すると第
2熱転写層(最外層)の樹脂成分が耐熱保護層側へ移行
してしまい、印字時の走行不良や印字品位の劣化が発生
してしまう。従って多孔質シリカ粒子の平均粒子径は第
2熱転写層の厚さより大きくなければならない。また多
孔質シリカ粒子の比表面積Sm2/gが100×106m/g>S/DT>
60×106m/gの範囲にないと、第2熱転写層(最外層)中
に均一に分散された粒子が第2熱転写層(最外層)にア
ンカーリングされず、粒子が最外熱転写層(最外層)か
ら簡単に離脱してしまいカセット内での走行不良を引き
起こす原因になる。従って多孔質シリカ粒子の比表面積
は、この第2熱転写層へ適用するにはこの平均粒子径範
囲と比表面積の範囲とから、 60×106m/g<(比表面積)/(平均粒子径)<100×1
06m/gの範囲とすることが必要である。多孔質シリカ粒
子の添加量は、印字品位と保存性に密接な関係があり多
孔質シリカ粒子が第2熱転写層(最外層)中に0.5重量
%未満だと、初期の印字品位は良いが高温保存性が悪
い、また50.0重量%超だと高温保存性は良いが初期印字
性が悪くなるという傾向がある。従って、多孔質シリカ
粒子の添加量は、印字品位と保存性を両立するために0.
5〜50.0%が良好である。Assuming that the specific surface area of the porous particles is S (m 2 / g) by the BET method and the average particle diameter is D μm, S / Dm / g is 100 × 10 6 m / g> S / D
> 60 × 10 6 m / g in the range of spherical porous particles having an average particle size in the range of 0.1 to 10.0 μm and basically 100
It is a porous silica particle that does not melt and soften at a temperature of not more than ℃, and one or more kinds can be used as needed. The porous silica particles need to have an average particle diameter larger than the thickness of the second thermal transfer layer (outermost layer).
If the average particle diameter of the porous silica particles is smaller than the thickness of the second thermal transfer layer (outermost layer), the porous silica particles will be buried in the second thermal transfer layer (outermost layer) and the second thermal transfer layer (outermost layer) Direct contact with the heat-resistant protective layer on the back side of the support cannot be prevented, especially when the resin component of the second thermal transfer layer (outermost layer) is transferred to the heat-resistant protective layer when stored for a long time in an environment at 60 ° C or higher. As a result, running defects during printing and deterioration in print quality occur. Therefore, the average particle diameter of the porous silica particles must be larger than the thickness of the second thermal transfer layer. The specific surface area Sm 2 / g of the porous silica particles is 100 × 10 6 m / g> S / DT>
If it is not within the range of 60 × 10 6 m / g, the particles uniformly dispersed in the second thermal transfer layer (outermost layer) are not anchored to the second thermal transfer layer (outermost layer), and the particles are not transferred to the outermost thermal transfer layer. (The outermost layer), which easily causes a running defect in the cassette. Therefore, the specific surface area of the porous silica particles can be calculated from the average particle diameter range and the specific surface area range for application to the second thermal transfer layer, from 60 × 10 6 m / g <(specific surface area) / (average particle diameter). ) <100 × 1
It is necessary in the range of 0 6 m / g. The addition amount of the porous silica particles is closely related to the print quality and the storage stability. If the amount of the porous silica particles is less than 0.5% by weight in the second thermal transfer layer (outermost layer), the initial print quality is good but the temperature is high. If the storability is poor, and if it exceeds 50.0% by weight, the high-temperature storability is good, but the initial printability tends to be poor. Therefore, the addition amount of the porous silica particles is 0.1 to achieve both print quality and storage stability.
5 to 50.0% is good.
耐熱保護層: 耐熱保護層は、シリコーン変性ポリマー系コーティン
グ剤、フッ素コーティング剤等滑り性と耐熱性を兼ね備
えたものが好ましく、その材料は特に限定されるもので
ない。Heat-resistant protective layer: The heat-resistant protective layer is preferably one having both slipperiness and heat resistance, such as a silicone-modified polymer coating agent and a fluorine coating agent, and the material is not particularly limited.
(実施例) 以下、実施例を挙げて本発明を更に具体的に説明する
が、本発明はこの実施例によって限定されるものではな
い。組成の部は重量基準である。(Examples) Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples. Parts of the composition are by weight.
(実施例1) 3.5μmのペットフィルムを支持体として、その表面
に下記の組成の第1熱転写層インキと最外熱転写層イン
キを、支持体の裏面に耐熱保護層用インキをそれぞれ調
製した後、付記した手段により塗布及び乾燥して本発明
の熱転写記録媒体を得た。(Example 1) After preparing a first thermal transfer layer ink and an outermost thermal transfer layer ink having the following composition on the surface of a 3.5 μm pet film as a support and an ink for a heat-resistant protective layer on the back surface of the support, respectively. The resultant was applied and dried by the above-mentioned means to obtain a thermal transfer recording medium of the present invention.
耐熱保護層 シリコーン系共重合エラストマー …100部 ポリイソシアネート …15部 メチルエチルケトン …500部 トルエン …400部 グラビアロール塗工法により、支持体の裏面に上記組
成のインキを100℃で塗工し、乾燥して、0.3μmの耐熱
保護層を形成した。Heat-resistant protective layer Silicone copolymer elastomer: 100 parts Polyisocyanate: 15 parts Methyl ethyl ketone: 500 parts Toluene: 400 parts Ink of the above composition is applied to the back surface of the support at 100 ° C. by a gravure roll coating method, and dried. , A 0.3 μm heat-resistant protective layer was formed.
第1熱転写層: パラフィンワックス …45部 エチレン−酢酸ビニル共重合体 …30部 カーボンブラック …15部 分散剤 …10部 100℃に加熱したインキ用三本ロールを用いて上記組
成のインクを調製し、これをホットメルトグラビアロー
ルにより支持体の表面に3.5μm厚になるように塗工
し、第1熱転写層を形成した。First thermal transfer layer: Paraffin wax: 45 parts Ethylene-vinyl acetate copolymer: 30 parts Carbon black: 15 parts Dispersant: 10 parts An ink having the above composition was prepared using a three roll ink for ink heated to 100 ° C. This was coated on the surface of the support with a hot melt gravure roll so as to have a thickness of 3.5 μm to form a first thermal transfer layer.
第2熱転写層(最外層): ポリアミド樹脂 …2部 ケトン樹脂 …70部 多孔質シリカ(SD−8,日鉄鉱業製) …1部 (平均粒度=8±2μm,比表面積=600〔m2/g〕以上) エチルアルコール …600部 酢酸エチル …300部 グラビアロール塗工法により、第1熱転写層の上に上
記組成のインキを塗工し、90℃で乾燥し、厚さ1.0μm
の第2熱転写層(最外層)を形成した。Second thermal transfer layer (outermost layer): Polyamide resin ... 2 parts Ketone resin ... 70 parts Porous silica (SD-8, manufactured by Nittetsu Mining) ... 1 part (average particle size = 8 ± 2 µm, specific surface area = 600 [m 2] / g] or more) Ethyl alcohol: 600 parts Ethyl acetate: 300 parts Ink of the above composition is applied on the first thermal transfer layer by a gravure roll coating method, dried at 90 ° C., and has a thickness of 1.0 μm.
Of the second thermal transfer layer (outermost layer).
このようにして得られた熱転写記録媒体をロール状態
に巻取り60℃−24時間保存した後でも、耐熱保護層側へ
の第2熱転写層(最外層)の成分の移行はまったく見ら
れず、室温下で市販のサーマルプリンターで熱転写印字
を行った結果、ベック平滑度200秒以上の平滑紙から、
ベック平滑度20秒程度のラフ紙まで良好な印字品位が得
られ、カセット内でのリボン走行やヘッド汚れ等のトラ
ブルも発生しなかった。Even after the heat transfer recording medium thus obtained was wound up in a roll state and stored at 60 ° C. for 24 hours, no transfer of the components of the second heat transfer layer (outermost layer) to the heat-resistant protective layer side was observed. As a result of performing thermal transfer printing with a commercial thermal printer at room temperature, from smooth paper with a Beck smoothness of 200 seconds or more,
Good print quality was obtained up to rough paper with a Beck smoothness of about 20 seconds, and no troubles such as running of the ribbon in the cassette and contamination of the head occurred.
(比較例1) 実施例1と同じ支持体上に、耐熱保護層、第1熱転写
層を実施例1と同様に調製して塗工し、第2熱転写層
(最外層)に多孔質シリカ比表面積が7〔m2/g〕以下の
ものを使用し、下記の組成とする以外は実施例1と同様
にして調製し塗工した。Comparative Example 1 A heat-resistant protective layer and a first thermal transfer layer were prepared and coated on the same support as in Example 1 in the same manner as in Example 1, and a porous silica ratio was applied to the second thermal transfer layer (outermost layer). A coating material having a surface area of 7 m 2 / g or less was prepared and coated in the same manner as in Example 1 except that the following composition was used.
第2熱転写層(最外層) ポリアミド樹脂 …2部 ケトン樹脂 …70部 多孔質シリカ(SH−4,日鉄鉱業製) …1部 (平均粒度=4±1μm,比表面積=7〔m2/g〕以下) エチルアルコール …600部 酢酸エチル …300部 このようにして得られた熱転写記録媒体をロール状態
に巻取り60℃−24時間保存すると、耐熱保護層側へ第2
熱転写層(最外層)の成分の移行が見られた。60℃−24
時間保存後のリボンを室温下で市販のサーマルプリンタ
ーで熱転写印字を行った結果、ベック平滑度200秒以上
の平滑紙で地汚れが発生し、ベック平滑度20秒程度のラ
フ紙ではドットの再現性が悪く良好な印字品位が得られ
なかった。また、カセット内でのリボン走行上リボンの
引出し力が増加し、時折スティク傾向が見られ走行上不
安定であった。また、ヘッド汚れ等のトラブルも発生し
た。Second thermal transfer layer (outermost layer) Polyamide resin ... 2 parts Ketone resin ... 70 parts Porous silica (SH-4, manufactured by Nittetsu Mining) ... 1 part (average particle size = 4 ± 1 µm, specific surface area = 7 [m 2 / g] The following) Ethyl alcohol: 600 parts Ethyl acetate: 300 parts The thus obtained thermal transfer recording medium is wound into a roll and stored at 60 ° C. for 24 hours.
Transfer of the components of the thermal transfer layer (outermost layer) was observed. 60 ° C-24
Thermal transfer printing of the ribbon after storage at room temperature with a commercial thermal printer at room temperature resulted in background staining on smooth paper with a Beck smoothness of 200 seconds or more, and dot reproduction on rough paper with a Beck smoothness of about 20 seconds. Good printing quality was not obtained due to poor properties. In addition, the pulling force of the ribbon during the running of the ribbon in the cassette increased, and a sticking tendency was occasionally observed and the running was unstable. In addition, troubles such as head contamination occurred.
(比較例2) 実施例1と同じ支持体上に、耐熱保護層、第1熱転写
層を実施例1と同様に調製して塗工し、第2熱転写層
(最外層)中にシリカの平均粒子径が0.1μm以下、か
つ比表面積が100〔m2/g〕以上のものを実施例1と同様
な組成で調製し塗工した。(Comparative Example 2) On the same support as in Example 1, a heat-resistant protective layer and a first thermal transfer layer were prepared and coated in the same manner as in Example 1, and an average of silica was contained in the second thermal transfer layer (outermost layer). Particles having a particle diameter of not more than 0.1 μm and a specific surface area of not less than 100 [m 2 / g] were prepared and coated in the same composition as in Example 1.
第2熱転写層(最外層) ポリアミド樹脂 …2部 ケトン樹脂 …70部 シリカ …1部 (平均粒度=0.007μm,比表面積=380〔m2/g〕) エチルアルコール …600部 酢酸エチル …300部 このようにして得られた熱転写記録媒体をロール状態
に巻取り60℃−24時間保存すると、耐熱保護層側へ第2
熱転写層(最外層)の成分の移行が見られた。60℃−24
時間保存後のリボンを室温下で市販のサーマルプリンタ
ーで熱転写印字を行った結果、ベック平滑度200秒以上
の平滑紙で地汚れが発生し、ベック平滑度20秒程度のラ
フ紙ではドットの再現性が悪く良好な印字品位が得られ
なかった。また、カセット内でのリボン走行上リボンの
引出し力が増加し時折スティック傾向が見られ走行上不
安定であった。また、ヘッド汚れ等のトラブルも発生し
た。The second thermal transfer layer (outermost layer) Polyamide resin ... 2 parts Ketone resin ... 70 parts of silica ... 1 part (average particle size = 0.007, specific surface area = 380 [m 2 / g]) ethyl alcohol ... 600 parts of ethyl acetate ... 300 parts The thus obtained thermal transfer recording medium is wound into a roll and stored at 60 ° C. for 24 hours.
Transfer of the components of the thermal transfer layer (outermost layer) was observed. 60 ° C-24
Thermal transfer printing of the ribbon after storage at room temperature with a commercial thermal printer at room temperature resulted in background staining on smooth paper with a Beck smoothness of 200 seconds or more, and dot reproduction on rough paper with a Beck smoothness of about 20 seconds. Good printing quality was not obtained due to poor properties. In addition, the pulling force of the ribbon during the running of the ribbon in the cassette increased, and the stick tended to be seen occasionally. In addition, troubles such as head contamination occurred.
本発明による熱転写記録媒体を用いれば、多孔質シリ
カ粒子の効果により従来の熱転写記録媒体と比べて、高
温および長期保存時に支持体裏面又は耐熱保護層側へ熱
転写層の成分が移行することを完全に防止し、保存後も
ドット再現性に優れた良好な印字が得られ、かつ良好な
リボン走行性が得られる。With the use of the thermal transfer recording medium according to the present invention, the effect of the porous silica particles makes it possible to completely prevent the components of the thermal transfer layer from migrating to the back surface of the support or the heat-resistant protective layer during high-temperature and long-term storage, as compared with conventional thermal transfer recording media. And good printing with excellent dot reproducibility is obtained even after storage, and good ribbon running properties are obtained.
第1図は本発明の熱転写記録媒体の断面拡大図であり、 1は支持体、2は第1熱転写層、3は第2熱転写層(最
外層)、4は耐熱保護層を示す。FIG. 1 is an enlarged cross-sectional view of the thermal transfer recording medium of the present invention, wherein 1 is a support, 2 is a first thermal transfer layer, 3 is a second thermal transfer layer (outermost layer), and 4 is a heat-resistant protective layer.
Claims (1)
1熱転写層とその上に熱可塑性樹脂と多孔質シリカ粒子
の複合体よりなる第2熱転写層を設けてなる熱転写記録
媒体において、最外層の第2熱転写層に平均粒子径Dμ
m、比表面積Sm2/gの球状多孔質シリカであって、S/Dm/
gが100×106m/g>S/D>60×106m/gの範囲にある多孔質
シリカ粒子を含有し、かつ該最外層の第2熱転写層が該
多孔質シリカ粒子の平均粒子径より薄いことを特徴とす
る熱転写記録媒体。1. A thermal transfer recording medium comprising: a first thermal transfer layer comprising a heat-meltable ink on a surface of a support; and a second thermal transfer layer comprising a composite of a thermoplastic resin and porous silica particles provided thereon. The average particle diameter Dμ is applied to the outermost second thermal transfer layer.
m, spherical porous silica having a specific surface area of Sm 2 / g, wherein S / Dm /
g is in the range of 100 × 10 6 m / g> S / D> 60 × 10 6 m / g, and the outermost second thermal transfer layer is an average of the porous silica particles. A thermal transfer recording medium characterized by being thinner than the particle diameter.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2297247A JP2653549B2 (en) | 1990-11-05 | 1990-11-05 | Thermal transfer recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2297247A JP2653549B2 (en) | 1990-11-05 | 1990-11-05 | Thermal transfer recording medium |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04173186A JPH04173186A (en) | 1992-06-19 |
JP2653549B2 true JP2653549B2 (en) | 1997-09-17 |
Family
ID=17844067
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2297247A Expired - Lifetime JP2653549B2 (en) | 1990-11-05 | 1990-11-05 | Thermal transfer recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2653549B2 (en) |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61177290A (en) * | 1985-02-01 | 1986-08-08 | Canon Inc | Thermal transfer material |
-
1990
- 1990-11-05 JP JP2297247A patent/JP2653549B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04173186A (en) | 1992-06-19 |
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