JPH01110187A - Thermal transfer body - Google Patents
Thermal transfer bodyInfo
- Publication number
- JPH01110187A JPH01110187A JP62268859A JP26885987A JPH01110187A JP H01110187 A JPH01110187 A JP H01110187A JP 62268859 A JP62268859 A JP 62268859A JP 26885987 A JP26885987 A JP 26885987A JP H01110187 A JPH01110187 A JP H01110187A
- Authority
- JP
- Japan
- Prior art keywords
- printing
- intermediate layer
- ink
- layer
- thermal transfer
- 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.)
- Pending
Links
- -1 polypropylene Polymers 0.000 claims abstract description 36
- 239000004743 Polypropylene Substances 0.000 claims abstract description 26
- 229920001155 polypropylene Polymers 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000004831 Hot glue Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 7
- 238000007639 printing Methods 0.000 abstract description 35
- 239000000853 adhesive Substances 0.000 abstract description 7
- 230000001070 adhesive effect Effects 0.000 abstract description 7
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 239000000835 fiber Substances 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000000654 additive Substances 0.000 abstract description 2
- 239000003963 antioxidant agent Substances 0.000 abstract description 2
- 239000004014 plasticizer Substances 0.000 abstract description 2
- 239000001993 wax Substances 0.000 abstract description 2
- 230000003078 antioxidant effect Effects 0.000 abstract 1
- 235000006708 antioxidants Nutrition 0.000 abstract 1
- 230000006866 deterioration Effects 0.000 abstract 1
- 239000000976 ink Substances 0.000 description 37
- 238000000034 method Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 238000010438 heat treatment Methods 0.000 description 12
- 229920000139 polyethylene terephthalate Polymers 0.000 description 8
- 239000005020 polyethylene terephthalate Substances 0.000 description 8
- 230000003247 decreasing effect Effects 0.000 description 6
- 238000002844 melting Methods 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 5
- 238000001035 drying Methods 0.000 description 4
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920000049 Carbon (fiber) Polymers 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000004917 carbon fiber Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000012943 hotmelt Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000872198 Serjania polyphylla Species 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005038 ethylene vinyl acetate Substances 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007757 hot melt coating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000004200 microcrystalline wax Substances 0.000 description 1
- 235000019808 microcrystalline wax Nutrition 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920001230 polyarylate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/426—Intermediate, backcoat, or covering layers characterised by inorganic compounds, e.g. metals, metal salts, metal complexes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
- B41M5/40—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used characterised by the base backcoat, intermediate, or covering layers, e.g. for thermal transfer dye-donor or dye-receiver sheets; Heat, radiation filtering or absorbing means or layers; combined with other image registration layers or compositions; Special originals for reproduction by thermography
- B41M5/42—Intermediate, backcoat, or covering layers
- B41M5/44—Intermediate, backcoat, or covering layers characterised by the macromolecular compounds
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は感熱転写体に関する。さらに詳しくは、本発明
は基体とインク層との間に特定の中間層を設けることに
よって多数回印字を可能にした感熱転写体に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal transfer member. More specifically, the present invention relates to a thermal transfer material that enables multiple printing by providing a specific intermediate layer between the substrate and the ink layer.
一般に、感熱転写体は、基体上に加熱により溶融もしく
は軟化して被転写体上に転写する熱溶融性または熱軟化
性のインク層を形成することによってつくられている（
例えば、特開昭５５−３９１９号公報）。In general, thermal transfer materials are made by forming a heat-melting or heat-softening ink layer on a substrate, which is melted or softened by heating and transferred onto the transfer target.
For example, Japanese Patent Application Laid-Open No. 55-3919).
そして、上記インク層を溶融または軟化させるための加
熱方式としては、感熱転写体に通電して、感熱転写体の
基体の発熱によってインクを溶融または軟化させる通電
式加熱方式と、一般に熱転写と呼ばれる方式、つまりサ
ーマルヘッドにより感熱転写体の基体を加熱し該基体を
介してインク層を加熱し、インクを溶融または軟化させ
るサーマルヘッドによる加熱方式が採用されている。The heating methods for melting or softening the ink layer include an electrical heating method in which the heat-sensitive transfer member is energized and the ink is melted or softened by the heat generated by the base of the heat-sensitive transfer member, and a method generally called thermal transfer. In other words, a heating method using a thermal head is adopted in which the base of the thermal transfer body is heated by the thermal head and the ink layer is heated through the base to melt or soften the ink.
上記通電式加熱方式をとる感熱転写体では、基体は一般
に抵抗層と呼ばれる電気抵抗が高く通電により発熱する
層と抵抗層を流れてきた電流を帰路電極に戻すための通
電層からなり、サーマルヘッドによる加熱方式をとる感
熱転写体では、基体には一般にポリエチレンテレフタレ
ートフィルム、ポリイミドフィルムなどのプラスチック
フイルムが用いられている。In the thermal transfer material that uses the above-mentioned current heating method, the base is generally made up of a layer called a resistance layer that has high electrical resistance and generates heat when electricity is applied, and a current-carrying layer that returns the current that has flowed through the resistance layer to the return electrode. In thermal transfer materials that employ a heating method, a plastic film such as a polyethylene terephthalate film or a polyimide film is generally used as the substrate.
ところで、従来の感熱転写体においては、上記の通電式
加熱方式、サーマルヘッドによる加熱方式のいかんにか
かわらず、−度印字に使用した感熱転写体は、再度印字
に使用すると、印字濃度の低下が著しく、再使用ができ
ないという問題があった。By the way, in conventional thermal transfer materials, regardless of whether the above-mentioned electrical heating method or heating method using a thermal head is used, if the thermal transfer material used for -degree printing is used for printing again, the print density will decrease. A significant problem was that it could not be reused.
すなわち、基体側からの印字情報により所望部分を局部
的に加熱し、該部分のインクを溶融または軟化して被転
写体上に転写すると、該部分のインクが全部ないしはほ
とんど転写してしまい、再度同じ部分で印字しようとし
ても、既にインクがなくなっているため、再使用、つま
り多数回印字をすることができなかった。In other words, if a desired area is locally heated based on print information from the substrate side, and the ink in that area is melted or softened and transferred onto the transfer target, all or most of the ink in that area will be transferred, and the ink will be transferred again. Even if you try to print on the same area, the ink has already run out, so you cannot reuse it, that is, print multiple times.
この発明は、従来の感熱転写体が多数回印字をすること
ができなかったという問題点を解決し、再使用による印
字濃度の低下が少なく多数回印字が可能な感熱転写体を
提供することを目的とする。This invention solves the problem that conventional thermal transfer materials cannot be printed many times, and provides a thermal transfer material that can be printed many times with less decrease in print density due to reuse. purpose.
ｃ問題点を解決するための手段〕
本発明は、基体とインク層との間にアククチツクポリプ
ロピレン系ホットメルト接着剤を主材とする中間層を設
け、この中間層のアククチツクポリプロピレン系ホット
メルト接着剤の基体およびインク層に対する大きな接着
強度を利用して、多数回印字を可能にしたものである。Means for Solving Problem c] The present invention provides an intermediate layer mainly made of an active polypropylene-based hot melt adhesive between a substrate and an ink layer, and This makes it possible to print multiple times by utilizing the high adhesive strength of the hot melt adhesive to the substrate and ink layer.
すなわち、アククチツクポリプロピレン系ホントメルト
接着剤は、基体に対しても、またインク層に対しても大
きな接着強度を有するので、このアククチツクポリプロ
ピレン系ホットメルト接着剤の基体に対する大きな接着
強度とインク層に対する大きな接着強度を利用して、印
字をしても、−回の印字では、その部分のインクが全部
被転写体に転写してしまわないようにし、同じ部分で繰
り返し印字をしても所望の印字濃度が得られるようにし
て、多数回印字を可能にしたのである。In other words, the harsh polypropylene hot melt adhesive has high adhesive strength both to the substrate and to the ink layer. Utilizing the high adhesion strength to the ink layer, even if printing is performed, all the ink in that area will not be transferred to the transfer object during the -th printing, and even if the same area is repeatedly printed. This made it possible to obtain the desired print density and print multiple times.
上記アククチツクポリプロピレン系ホットメルト接着剤
は、アククチツクポリプロピレン単独か、またはアクク
チツクポリプロピレンを主成分としこれにワックス類、
可塑剤、タッキファイヤ、酸化防止剤などの添加剤を適
宜添加して調製されるものであり、アタクチックポリプ
ロピレンに基づく強力な接着力により前記のような効果
を発揮して、感熱転写体を多数回印字ができるようにさ
せる。The above-mentioned acute polypropylene-based hot melt adhesive is composed of either only acute polypropylene, or mainly composed of acute polypropylene and waxes, etc.
It is prepared by adding appropriate additives such as plasticizers, tackifiers, and antioxidants, and it exhibits the above-mentioned effects due to the strong adhesive force based on atactic polypropylene, and can be used for many thermal transfer materials. Make it possible to print twice.
上記の中間層は、該中間層での熱損失を防ぐために、ア
ククチツクポリプロピレン系ホットメルト接着剤中にカ
ーボン粉末、カーボン短繊維、アルミニウム、ニッケル
、銅、銀、金などの金属粉末、それら金属の短繊維など
の熱伝導性物質を添加混入した混合物で形成してもよい
。これら熱伝導性物質はアククチツクポリプロピレン系
ホットメルト接着剤中に１重量％程度以上添加すれば、
中間層の熱伝導性を高めることができ、また、あまり添
加量が多くなるとアククチツクポリプロピレン系ホット
メルト接着剤の基体やインク層に対する接着強度が低下
して多数回印字が困難になるので、熱伝導性物質の添加
量は通常１〜３０重景％重量に１〜１０重量％にするの
が好ましい。In order to prevent heat loss in the intermediate layer, the above intermediate layer contains carbon powder, short carbon fibers, metal powder such as aluminum, nickel, copper, silver, gold, etc. in an active polypropylene hot melt adhesive. It may also be formed from a mixture containing a thermally conductive substance such as short metal fibers. If these thermally conductive substances are added in an amount of about 1% by weight or more to an active polypropylene hot melt adhesive,
It can increase the thermal conductivity of the intermediate layer, and if the amount added is too large, the adhesive strength of the aggressive polypropylene hot melt adhesive to the substrate and ink layer will decrease, making it difficult to print multiple times. The amount of the thermally conductive substance added is usually 1 to 30% by weight, preferably 1 to 10% by weight.
本発明において、中間層はアタクチックポリプロピレン
系ホットメルト接着剤を主材として形成するが、このア
ククチツクポリプロピレン系ホットメルト接着剤を主材
とするとは、アタクチックポリプロピレン系ホットメル
ト接着剤のみで中間層を形成する場合および上記のよう
にアククチツクポリプロピレン系ホットメルト接着剤に
カーボン粉末、カーボン短繊維、金属粉末、金属短繊維
などの熱伝導性物質を添加混入した混合物で中間層を形
成する場合の両者を含む。In the present invention, the intermediate layer is formed using an atactic polypropylene hot melt adhesive as the main material, but the term "based on an atactic polypropylene hot melt adhesive" means that the intermediate layer is made of an atactic polypropylene hot melt adhesive only. When forming an intermediate layer, as described above, an intermediate layer is formed using a mixture of an aggressive polypropylene hot melt adhesive mixed with thermally conductive substances such as carbon powder, short carbon fibers, metal powder, and short metal fibers. Including both cases.
中間層の形成は、アククチツクポリプロピレン系ホット
メルト接着剤を溶剤に溶解するか、アククチツクポリプ
ロピレン系ホットメルト接着剤と熱伝導性物質とを溶剤
中で混合、分散し、基体上に塗布、乾燥することによっ
て行われる。この中間層の厚さは０．２〜２μｍにする
のが好ましい。The intermediate layer is formed by dissolving an active polypropylene hot melt adhesive in a solvent, or by mixing and dispersing an active polypropylene hot melt adhesive and a thermally conductive substance in a solvent, and applying the mixture onto the substrate. , which is done by drying. The thickness of this intermediate layer is preferably 0.2 to 2 μm.
すなわち、中間層の厚さが０．２μｍ未満の場合は薄す
ぎるために作製が困難である上に多数回印字を可能にす
る効果が充分でなく、また、中間層の厚さが２μｍを超
えると中間層での熱損失が大きくなるので印字特性が低
下するおそれがある。That is, if the thickness of the intermediate layer is less than 0.2 μm, it is too thin and difficult to manufacture, and the effect of enabling multiple printing is not sufficient, and if the thickness of the intermediate layer exceeds 2 μm. Since the heat loss in the intermediate layer increases, there is a risk that printing characteristics may deteriorate.
本発明の感熱転写体の作製にあたって、基体は通電式加
熱方式をとるものと、サーマルヘッドによる加熱方式を
とるものとによって異なる。In producing the thermal transfer body of the present invention, the substrate differs depending on whether it uses an electrical heating method or a heating method using a thermal head.
通電式加熱方式をとるものにおいては、基体は抵抗層と
導電層からなり、中間層は導電層上に形成される。上記
抵抗層は通電用電極との接触抵抗を低くするために通電
用電極との接触側に低抵抗層を設けたものでもよい。一
方、サーマルヘッドによる加熱方式をとるものでは、基
体には、例えばポリエチレンテレフタレートフィルム、
ポリイミドフィルム、ポリカーボネートフィルム、ボリ
アリレートフィルム、ポリアミドフィルムなどのプラス
チックフィルムが用いられる。In the case of using an electric heating method, the base body consists of a resistive layer and a conductive layer, and the intermediate layer is formed on the conductive layer. The resistance layer may include a low-resistance layer provided on the side in contact with the current-carrying electrode in order to reduce the contact resistance with the current-carrying electrode. On the other hand, in those that use a heating method using a thermal head, the substrate is made of polyethylene terephthalate film, for example.
Plastic films such as polyimide film, polycarbonate film, polyarylate film, and polyamide film are used.
インク層形成用のインクとしては、それぞれの加熱方式
をとる感熱転写体において通常に使用されるものを何ら
特別な制約を受けることなく使用することができる。本
発明は、多数回印字をすることが可能な感熱転写体を得
ることを目的とするが、上記のようにインク層形成用の
インクに関して従来使用のインクをそのまま用いること
ができるという特長がある。また、このインク層形成用
のインクに、インクの凝集力を高める観点から、アクク
チツクポリプロピレン系ホットメルト接着剤を少量添加
することも可能である。As the ink for forming the ink layer, those commonly used in thermal transfer bodies employing the respective heating methods can be used without any special restrictions. The present invention aims to obtain a heat-sensitive transfer material that can be printed multiple times, and as mentioned above, it has the advantage that conventionally used inks can be used as is for ink layer formation. . Further, from the viewpoint of increasing the cohesive force of the ink, it is also possible to add a small amount of an aggressive polypropylene hot melt adhesive to the ink for forming the ink layer.
つぎに実施例をあげて本発明をさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例１
ポリカーボネート１５重量部と導電性カーボンブラック
（米国キャボット社製のパルカンＸＣ−７２（商品名）
） ５．４重量部を塩化メチレン１３０重量部中に混入
し、ボールミルで８時間分散したのち、この分散物を厚
さ７５μｍのポリエチレンテレフタレートフィルム上に
乾燥後の厚さが１５μｍになるように溶液流延法で塗布
し、乾燥して抵抗層を形成した。この抵抗層上にアルミ
ニウムを１０００人（１００ｎｍ）の厚さに蒸着して導
電層を形成した。Example 1 15 parts by weight of polycarbonate and conductive carbon black (Pulcan XC-72 (trade name) manufactured by Cabot, USA)
) 5.4 parts by weight were mixed in 130 parts by weight of methylene chloride and dispersed in a ball mill for 8 hours, and then the dispersion was placed on a polyethylene terephthalate film with a thickness of 75 μm so that the thickness after drying would be 15 μm. It was applied by a casting method and dried to form a resistance layer. A conductive layer was formed on this resistance layer by vapor depositing aluminum to a thickness of 1000 nm (100 nm).
この抵抗層と導電層を基体として、その導電層上に次に
示すようにして中間層を形成した。Using the resistive layer and conductive layer as a base, an intermediate layer was formed on the conductive layer in the following manner.
すなわち、アククチツクポリプロピレン系ホットメルト
接着剤（松材石油（株）製、ネオメルトＨＭ−１３０Ｏ
Ｒ（商品名））１重量部と粒径０．０２〜０．１μｍの
カーボンブラック０．１重量部をトルエン１００重量部
中に混入し、ボールミルで４時間分散した後、前記基体
の導電層上に乾燥後の厚さが１μｍになるようにワイヤ
ーバーを用いて塗布し、乾燥して中間層を形成した。That is, an aggressive polypropylene hot melt adhesive (Matsuzai Oil Co., Ltd., Neomelt HM-130O)
R (trade name)) and 0.1 part by weight of carbon black with a particle size of 0.02 to 0.1 μm were mixed in 100 parts by weight of toluene and dispersed in a ball mill for 4 hours. It was coated on top using a wire bar to a dry thickness of 1 μm and dried to form an intermediate layer.
つぎに、ポリアミド１０重量部と着色剤としてのカーボ
ンブランク２．５重量部をｎ−プロピルアルコール５０
重量部中に混入し、ボールミルで８時間分散して熱溶融
性のインクをｎ−プロピルアルコールの存在下で調製し
、これを前記中間層上に乾燥後の厚さが４μｍになるよ
うにワイヤーバーを用いて塗布し、乾燥してインク層を
形成した。インク層が充分に乾燥した後、キャリアフィ
ルムとして用いたポリエチレンテレフタレートフィルム
を抵抗層から取り除き、通電式の感熱転写体を得た。Next, 10 parts by weight of polyamide and 2.5 parts by weight of carbon blank as a coloring agent were mixed with 50 parts by weight of n-propyl alcohol.
parts by weight and dispersed in a ball mill for 8 hours to prepare a hot-melt ink in the presence of n-propyl alcohol, which was then spread over the intermediate layer with a wire so that the thickness after drying was 4 μm. It was applied using a bar and dried to form an ink layer. After the ink layer was sufficiently dried, the polyethylene terephthalate film used as a carrier film was removed from the resistive layer to obtain an electrically conductive heat-sensitive transfer member.
上記のようにして得られた感熱転写体を第１図に示す。The thermal transfer body obtained as described above is shown in FIG.
図中、１は基体であり、この基体１は抵抗層１ａと導電
層１ｂからなる。２は中間層で、この中間層２は前記の
ようにアククチツクポリプロピレン系ホットメルト接着
剤にカーボンブラックを添加混入した混合物で基体１の
導電層ｌｂ上に形成されたものである。３は該中間層２
上に形成された熱溶融性のインク層である。In the figure, 1 is a base body, and this base body 1 consists of a resistive layer 1a and a conductive layer 1b. Reference numeral 2 denotes an intermediate layer, which is formed on the conductive layer 1b of the substrate 1 using a mixture of an active polypropylene hot-melt adhesive and carbon black added thereto, as described above. 3 is the intermediate layer 2
This is a heat-melting ink layer formed on top.
上記通電式感熱転写体の基体１の抵抗層１ａに、電源と
接続した断面積の直径７５μｍの通電用タングステン電
極と帰路電極を接触させ、１ドツトあたり０．５ミリ秒
の間、２０Ｖ、３０ｍＡを印加し、直径ｌ１００ＩＩの
スポット印字を縦４０ドツト×横２５ドツトで同一位置
のインクにより面積４ Ｘ２．５ ｍｍ”の印字をボン
ド紙（ベック平滑度７秒）上に１０回行った。このよう
にして４０ドツト×２５ドツトで印字された部分につい
て印字濃度をマクベス社製の反射濃度計で測定した。そ
の結果を後記の比較例１とともに第１表に示す。A current-carrying tungsten electrode with a cross-sectional area of 75 μm in diameter connected to a power supply and a return electrode were brought into contact with the resistance layer 1a of the base 1 of the current-carrying heat-sensitive transfer body, and the current was applied at 20V and 30mA for 0.5 milliseconds per dot. was applied, and spot printing with a diameter of 1100 II was performed 10 times using ink of 40 vertical dots x 25 horizontal dots in an area of 4 x 2.5 mm" at the same position on bond paper (Beck smoothness: 7 seconds). The print density of the area printed with 40 dots x 25 dots was measured using a reflection densitometer manufactured by Macbeth.The results are shown in Table 1 together with Comparative Example 1 below.
比較例１
中間層を設けなかったほかは実施例１と同様の構成から
なる通電式の感熱転写体を作製した。Comparative Example 1 An electrically conductive heat-sensitive transfer member having the same structure as in Example 1 except that no intermediate layer was provided was produced.
つまり、この比較例１の感熱転写体は、第２図に示すよ
うに、抵抗層１ａと導電層１ｂとからなる基体１の導電
ＪＷｌｂ側に直接、熱溶融性のインク層３を形成したも
のである。In other words, as shown in FIG. 2, the thermal transfer body of Comparative Example 1 has a heat-melting ink layer 3 formed directly on the conductive JWlb side of the base 1 consisting of a resistive layer 1a and a conductive layer 1b. It is.
この比較例１の感熱転写体についても、前記実施例１の
場合と同条件下で印字を行い、その印字濃度を測定した
。その結果を第１表に示す。なお、第１表は印字濃度を
示すものであるが、印字濃度は、印字回数の増加に伴う
印字濃度の低下が理解しやすいように、第１回目の印字
、第２回目の印字、第３回目の印字、第５回目の印字、
第７回目の印字および第１０回目の印字について示され
ている。これは後記の第２表においても同様である。Printing was also performed on the thermal transfer material of Comparative Example 1 under the same conditions as in Example 1, and the print density was measured. The results are shown in Table 1. Table 1 shows the print density, but to make it easier to understand the decrease in print density as the number of prints increases, the print density is calculated based on the first print, the second print, and the third print. 5th printing, 5th printing,
The seventh printing and the tenth printing are shown. This also applies to Table 2 below.
第 １ 表
第１表に示すように、実施例１の感熱転写体、比較例１
の感熱転写体とも、第１回目の印字では、印字濃度が１
．８で、両者とも良好な印字が得られたが、実施例１の
感熱転写体では、印字回数が増えても印字濃度の低下が
少なく多数回印字が可能であったのに対し、従来品であ
る比較例１の感熱転写体では、第２回目の印字で印字濃
度が著しく低下し、第３回目の印字では印字濃度が０．
１まで低下し、以後はまったく印字をすることができな
かった。Table 1 As shown in Table 1, the thermal transfer material of Example 1, Comparative Example 1
For both thermal transfer materials, the printing density is 1 at the first printing.
．． 8, good printing was obtained in both cases, but with the thermal transfer material of Example 1, even if the number of printings increased, there was little decrease in printing density, and it was possible to print many times, whereas with the conventional product. In the thermal transfer material of Comparative Example 1, the print density decreased significantly in the second printing, and the print density decreased to 0.0 in the third print.
The value decreased to 1, and no printing was possible after that.
実施例２
基体として厚さ３．５μｍのポリエチレンテレフタレー
トフィルムを用い、この基体上に次に示すようにして中
間層を形成した。Example 2 A polyethylene terephthalate film having a thickness of 3.5 μm was used as a substrate, and an intermediate layer was formed on this substrate in the following manner.
すなわち、アククチツクポリプロピレン系ホットメルト
接着剤（松材石油（株））製、ネオメルトＨＭ−１１６
ＯＲ（商品名））１重量部と粒径０，０２〜０．１μｍ
のカーボンブラック０．１重量部をｎ−ヘプタン１００
重量部中に混入し、ボールミルで４時間分散した後、こ
の分散物を前記ポリエチレンテレフタレートフィルムか
らなる基体上に乾燥後の厚さが１μｍになるようにワイ
ヤーバーを用いて塗布し、乾燥して、中間層を形成した
。That is, an aggressive polypropylene hot melt adhesive (Matsuzai Oil Co., Ltd.), Neomelt HM-116.
OR (trade name)) 1 part by weight and particle size 0.02-0.1 μm
0.1 part by weight of carbon black and 100 parts by weight of n-heptane
After dispersing in a ball mill for 4 hours, this dispersion was applied onto the substrate made of the polyethylene terephthalate film using a wire bar so that the thickness after drying was 1 μm, and dried. , formed an intermediate layer.
つぎに、脂肪酸エステル、パラフィンワックス、マイク
ロクリスタリンワックス、低分子量樹脂、エチレン−酢
酸ビニル共重合体およびカーボンブラックなどからなる
熱溶融性のインクを前記中間層上に厚さ３μｍでホット
メルトコーティング法により塗布し、インク層を形成し
て、サーマルヘッドによる加熱方式の感熱転写体を得た
。Next, a hot-melt ink made of fatty acid ester, paraffin wax, microcrystalline wax, low molecular weight resin, ethylene-vinyl acetate copolymer, carbon black, etc. is applied onto the intermediate layer to a thickness of 3 μm using a hot-melt coating method. An ink layer was formed and a thermal transfer body heated by a thermal head was obtained.
上記のようにして得られた感熱転写体を第３図に示す。The thermal transfer body obtained as described above is shown in FIG.
図中、１１はポリエチレンテレフタレートフィルムから
なる基体であり、１２は中間層で、この中間層１２は前
記のようにアククチツクポリプロピレン系ホットメルト
接着剤にカーボンブラックを添加混入した混合物で基体
１１上に形成したものである。１３は該中間層１２上に
形成された熱溶融性のインク層である。In the figure, 11 is a base made of polyethylene terephthalate film, and 12 is an intermediate layer, and this intermediate layer 12 is made of a mixture of an aggressive polypropylene hot melt adhesive mixed with carbon black as described above, and is formed on the base 11. It was formed in 13 is a heat-melting ink layer formed on the intermediate layer 12.
上記感熱転写体の基体１１に発熱面積１７０ Ｘ １６
０μｍ”のサーマルヘッドを当接して印字エネルギ０．
５ｍｊ／ｄａｔで同一位置のインクにより面積３．８Ｘ
３．８ ｍｍ２の印字をコピー用紙（ペック平滑度５８
秒）上に１０回行った。The base 11 of the thermal transfer body has a heat generating area of 170 x 16
The printing energy is 0.0μm by contacting the thermal head.
Area 3.8X due to ink in the same position at 5mj/dat
3.8 mm2 printing on copy paper (Peck smoothness 58
seconds) above 10 times.
このようにして印字された部分について印字濃度をマク
ベス社製の反射濃度計で測定した。その結果を後記の比
較例２とともに第２表に示す。The print density of the thus printed portion was measured using a reflection densitometer manufactured by Macbeth. The results are shown in Table 2 together with Comparative Example 2 described below.
比較例２
中間層を設けなかったほかは実施例２と同様の構成から
なる感熱転写体を作製した。Comparative Example 2 A thermal transfer member having the same structure as Example 2 except that no intermediate layer was provided was produced.
すなわち、この比較例２の感熱転写体は、第４図に示す
ように、ポリエチレンテレフタレートフィルムからなる
基体１１上に直接、熱溶融性のインク層１３を形成した
ものである。That is, in the thermal transfer body of Comparative Example 2, as shown in FIG. 4, a heat-melting ink layer 13 was formed directly on a substrate 11 made of a polyethylene terephthalate film.
この比較例２の感熱転写体についても、前記実施例２の
場合と同条件下で印字を行い、その印字濃度を測定した
。その結果を第２表に示す。Printing was also performed on the thermal transfer material of Comparative Example 2 under the same conditions as in Example 2, and the print density was measured. The results are shown in Table 2.
第 ２ 表
第２表に示すように、実施例２の感熱転写体、比較例２
の感熱転写体とも、第１回目の印字では、印字濃度が１
．８で、両者とも良好な印字が得られたが、実施例２の
感熱転写体では、印字回数が増えても印字濃度の低下が
少なく多数回印字が可能であったのに対し、従来品であ
る比較例２の感熱転写体では、第２回目の印字で印字濃
度が著しく低下し、第３回目の印字では印字濃度が０．
１まで低下し、以後はまったく印字をすることができな
かった。Table 2 As shown in Table 2, the thermal transfer material of Example 2, Comparative Example 2
For both thermal transfer materials, the printing density is 1 at the first printing.
．． 8, good printing was obtained in both cases, but with the thermal transfer material of Example 2, even if the number of printings increased, there was little decrease in print density and it was possible to print many times, whereas with the conventional product. In the thermal transfer material of Comparative Example 2, the print density decreased significantly in the second printing, and the print density decreased to 0.0 in the third print.
The value decreased to 1, and no printing was possible after that.
以上説明したように、本発明では、基体とインク層との
間にアタクチックポリプロピレン系ホットメルト接着剤
を主材とする中間層を設けることによって、多数回印字
が可能な感熱転写体を提供することができた。As explained above, the present invention provides a thermal transfer material that can be printed multiple times by providing an intermediate layer mainly made of an atactic polypropylene hot melt adhesive between the substrate and the ink layer. I was able to do that.
第１図は本発明の実施例１の感熱転写体を示す断面図で
あり、第２図は比較例１の感熱転写体を示す断面図であ
る。第３図は本発明の実施例２の感熱転写体を示す断面
図であり、第４図は比較例２の感熱転写体を示す断面図
である。
１．１１・・・基体、 ２．１２・・・中間層、３．１
３・・・インク層
特許出願人 日立マクセル株式会社
第 １ 図
１・・・基体
２・・・中間層
第 ３ 図
１１・・・基体
１２・・・中間層
１３・・・インク層
第 ４ 図FIG. 1 is a sectional view showing a thermal transfer body of Example 1 of the present invention, and FIG. 2 is a sectional view of a thermal transfer body of Comparative Example 1. FIG. 3 is a sectional view showing a thermal transfer body of Example 2 of the present invention, and FIG. 4 is a sectional view of a thermal transfer body of Comparative Example 2. 1.11... Base body, 2.12... Intermediate layer, 3.1
3... Ink layer Patent applicant Hitachi Maxell Ltd. No. 1 Fig. 1... Substrate 2... Intermediate layer No. 3 Fig. 11... Substrate 12... Intermediate layer 13... Ink layer Fig. 4
Claims (2)
成した構成の感熱転写体において、上記中間層をアタク
チックポリプロピレン系ホットメルト接着剤を主材とし
て形成したことを特徴とする感熱転写体。(1) A thermal transfer material having a structure in which an intermediate layer and an ink layer are sequentially formed on a substrate in a laminated manner, characterized in that the intermediate layer is formed mainly of an atactic polypropylene hot melt adhesive. body.
トメルト接着剤と熱伝導性物質との混合物からなること
を特徴とする特許請求の範囲第１項記載の感熱転写体。(2) The thermal transfer member according to claim 1, wherein the intermediate layer is made of a mixture of an atactic polypropylene hot melt adhesive and a thermally conductive substance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62268859A JPH01110187A (en) | 1987-10-23 | 1987-10-23 | Thermal transfer body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62268859A JPH01110187A (en) | 1987-10-23 | 1987-10-23 | Thermal transfer body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01110187A true JPH01110187A (en) | 1989-04-26 |
Family
ID=17464259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62268859A Pending JPH01110187A (en) | 1987-10-23 | 1987-10-23 | Thermal transfer body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01110187A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013193364A (en) * | 2012-03-21 | 2013-09-30 | Toppan Printing Co Ltd | Thermal transfer recording medium |
-
1987
- 1987-10-23 JP JP62268859A patent/JPH01110187A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013193364A (en) * | 2012-03-21 | 2013-09-30 | Toppan Printing Co Ltd | Thermal transfer recording medium |
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