JP3849054B2 - Electrostatic printing sheet - Google Patents
Electrostatic printing sheet Download PDFInfo
- Publication number
- JP3849054B2 JP3849054B2 JP2001398345A JP2001398345A JP3849054B2 JP 3849054 B2 JP3849054 B2 JP 3849054B2 JP 2001398345 A JP2001398345 A JP 2001398345A JP 2001398345 A JP2001398345 A JP 2001398345A JP 3849054 B2 JP3849054 B2 JP 3849054B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid toner
- acrylic acid
- resin
- ethylene
- eraser
- 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 - Fee Related
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- 238000007639 printing Methods 0.000 title claims description 22
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- 239000004925 Acrylic resin Substances 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 28
- 239000011347 resin Substances 0.000 claims description 28
- 229920005989 resin Polymers 0.000 claims description 28
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 claims description 27
- 239000011248 coating agent Substances 0.000 claims description 25
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 7
- 229920000178 Acrylic resin Polymers 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 4
- 239000005977 Ethylene Substances 0.000 claims description 4
- -1 aldehyde compounds Chemical class 0.000 description 21
- 238000011156 evaluation Methods 0.000 description 12
- 229920002873 Polyethylenimine Polymers 0.000 description 10
- 239000003795 chemical substances by application Substances 0.000 description 9
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 229920000768 polyamine Polymers 0.000 description 6
- 229920001131 Pulp (paper) Polymers 0.000 description 5
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- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 4
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- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 3
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- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
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- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
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- JMEWGCRUPXQFQL-UHFFFAOYSA-N 1,2-dichloro-5,12-dihydroquinolino[2,3-b]acridine-7,14-dione Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C(C(=O)C=1C(=CC=C(C=1Cl)Cl)N1)C1=C2 JMEWGCRUPXQFQL-UHFFFAOYSA-N 0.000 description 1
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 description 1
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- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 1
- LVOJOIBIVGEQBP-UHFFFAOYSA-N 4-[[2-chloro-4-[3-chloro-4-[(5-hydroxy-3-methyl-1-phenylpyrazol-4-yl)diazenyl]phenyl]phenyl]diazenyl]-5-methyl-2-phenylpyrazol-3-ol Chemical compound CC1=NN(C(O)=C1N=NC1=CC=C(C=C1Cl)C1=CC(Cl)=C(C=C1)N=NC1=C(O)N(N=C1C)C1=CC=CC=C1)C1=CC=CC=C1 LVOJOIBIVGEQBP-UHFFFAOYSA-N 0.000 description 1
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- 102100031260 Acyl-coenzyme A thioesterase THEM4 Human genes 0.000 description 1
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- BRLQWZUYTZBJKN-UHFFFAOYSA-N Epichlorohydrin Chemical compound ClCC1CO1 BRLQWZUYTZBJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 101000638510 Homo sapiens Acyl-coenzyme A thioesterase THEM4 Proteins 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
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- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
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- 235000021355 Stearic acid Nutrition 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical class OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 150000003973 alkyl amines Chemical class 0.000 description 1
- 125000005263 alkylenediamine group Chemical group 0.000 description 1
- WLDHEUZGFKACJH-UHFFFAOYSA-K amaranth Chemical compound [Na+].[Na+].[Na+].C12=CC=C(S([O-])(=O)=O)C=C2C=C(S([O-])(=O)=O)C(O)=C1N=NC1=CC=C(S([O-])(=O)=O)C2=CC=CC=C12 WLDHEUZGFKACJH-UHFFFAOYSA-K 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- ZRALSGWEFCBTJO-UHFFFAOYSA-N anhydrous guanidine Natural products NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 239000002518 antifoaming agent Substances 0.000 description 1
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- 125000004069 aziridinyl group Chemical group 0.000 description 1
- HFACYLZERDEVSX-UHFFFAOYSA-N benzidine Chemical compound C1=CC(N)=CC=C1C1=CC=C(N)C=C1 HFACYLZERDEVSX-UHFFFAOYSA-N 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
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- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 238000003851 corona treatment Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- 229920006242 ethylene acrylic acid copolymer Polymers 0.000 description 1
- 229920005648 ethylene methacrylic acid copolymer Polymers 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
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- 238000009501 film coating Methods 0.000 description 1
- 235000004426 flaxseed Nutrition 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 1
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- 229940097275 indigo Drugs 0.000 description 1
- COHYTHOBJLSHDF-UHFFFAOYSA-N indigo powder Natural products N1C2=CC=CC=C2C(=O)C1=C1C(=O)C2=CC=CC=C2N1 COHYTHOBJLSHDF-UHFFFAOYSA-N 0.000 description 1
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- GWVMLCQWXVFZCN-UHFFFAOYSA-N isoindoline Chemical compound C1=CC=C2CNCC2=C1 GWVMLCQWXVFZCN-UHFFFAOYSA-N 0.000 description 1
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
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- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
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Images
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- Liquid Developers In Electrophotography (AREA)
- Paper (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
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Description
【０００１】
【発明の属する技術分野】
本発明は、静電印刷用シートに関するものである。
【０００２】
【従来の技術】
最近、電子写真法を用いたプラスチックフィルム、紙等に対する画像形成方法が注目されている。この方法は衆知のごとく製版工程が不要であるため、少量多品種の印刷物を製造するには最適な方法である。特に、液体トナ−を使用した電子写真現像法は粉体トナ−を使用した場合と比較して出力画像が高精細で品質が良く、画像品質の面ではグラビア印刷方式、オフセット印刷方式に匹敵するレベルまで達している。
【０００３】
しかしながら、液体トナ−を使用した場合、液体トナーとの密着性の問題などプリント適性の点から使用できる用紙がコート紙に限定されるため、コストアップになる問題があるとともに、鉛筆、水性ペン、ボールペンなどで良好に筆記できない、筆記後に消しゴムで良好に消せないなどの問題があった。
【０００４】
【発明が解決しようとする課題】
本発明の目的は、従来の問題を解決し、液体トナーの定着性に優れるので使用する用紙はコート紙に限定されず、普通の紙や合成紙、プラスチックフィルムなどを使用できる上、鉛筆、水性ペン、ボールペンなどによる筆記性に優れ、また筆記後に消しゴムで良好に消すことができ、また水性ペンで筆記後に市販のインキ消し剤できれいに消すこともできるなどの特性を有する液体トナー受容層を用紙（シート基材）上に形成した静電印刷用シートを提供することである。
【０００５】
【課題を解決するための手段】
本発明者等は前記課題を解決すべく鋭意研究を重ねた結果、特定のアクリル酸系共重合体樹脂とポリイミン系樹脂を主成分として含む塗工液を用いることにより、前記課題を解決できることを見出し、本発明を完成するに至った。
【０００６】
すなわち、本発明の請求項１は、紙からなるシート基材面の所定箇所に、エチレン・アクリル酸系樹脂とポリイミン系樹脂を主成分として含む塗工液であって、前記エチレン・アクリル酸系樹脂としてアクリル酸比率が２〜３０モル％、重量平均分子量が８０００〜２００００のエチレン・アクリル酸系樹脂を用いるとともに、前記エチレン・アクリル酸系樹脂と前記ポリイミン系樹脂の配合比が、前記エチレン・アクリル酸系樹脂：前記ポリイミン系樹脂＝１：５〜５：１（質量比）である塗工液を用いて、液体トナー定着性、筆記性、消しゴム適性およびインキ消し適性に優れた液体トナー受容層を設けてなることを特徴とする静電印刷用シートである。
【０００７】
このように、エチレン・アクリル酸系樹脂とポリイミン系樹脂を主成分として含む本発明で用いる塗工液は、印刷生産性が高く、この塗工液を用いてシート基材（用紙）面の所定箇所に液体トナー受容層（例えば薄膜コーテイング）を形成すると、この液体トナー受容層は液体トナーの密着性、定着性に優れており、例えば液体トナー受容層上に液体トナーをプリントしたプリント部にセロハンテープを貼着した後、セロハンテープを剥離してもプリント部が剥離しないので、使用するシート基材は高価なコート紙に限定されず、普通の紙や合成紙、プラスチックフィルムなどを使用できる上、この液体トナー受容層は鉛筆、水性ペン、ボールペンなどによる筆記性に優れており、また筆記後に消しゴムで良好に消すことができ、また水性ペンで筆記後に市販のインキ消し剤できれいに消すこともできる。
【０００８】
本発明で用いる塗工液を用いてシート基材（例えば上質紙など）上に液体トナー受容層を形成することにより、液体トナーの定着性、筆記性、消しゴム適性、インキ消し適性に優れる安価な静電印刷用シートを提供できる。
【０００９】
【発明の実施の形態】
以下、本発明の実施の形態を詳細に説明する。
図１は、本発明の静電印刷用シートの一実施形態を示す断面説明図である。
図１において、本発明の静電印刷用シート１は、本発明で用いる塗工液を使用して、シート基材２の表面には全面に、その裏面には所定箇所に液体トナー受容層３が形成してある。４は、液体トナー受容層３の上に図示しないプリンタで印字された印字である。
【００１０】
本発明で用いるエチレン・アクリル酸系樹脂は、エチレンとアクリル酸とを共重合して得られる樹脂であり、アクリル酸比率は特に限定されないが、アクリル酸比率が２〜３０モル％、重量平均分子量がおよそ８０００〜２００００のものが好適に用いられる。エチレン・アクリル酸系樹脂は水に分散／または有機溶剤に溶解した形態で用いられる。しかし、エチレン・アクリル酸系樹脂は、通常、アクリル酸をアンモニア、アミン等のアルカリ塩またはナトリウム、亜鉛等の金属塩にして水に分散した形態で用いられる。
【００１１】
本発明で用いるポリイミン系樹脂としては、分子骨格中に第一級、第二級および第三級アミノ基の一種またはそれ以上を含むポリマーであれば特に制限されるものではない。
ポリイミン系樹脂としては、具体的には、例えば、ポリエチレンイミン、ポリプロピレンイミンなどのポリアルキレンイミン；ポリアルキレンイミンとアルデヒド化合物、ケトン化合物、アルキルハライド化合物、イソシアネート化合物、チオイソシアネート化合物、活性オレフィン化合物、エポキシ化合物、シアナミド化合物、グアニジン化合物、尿素、チオ尿素、カルボキシ化合物、酸無水物、アシルハライド化合物などとの反応物；カルボキシ含有アクリル樹脂とアルキレンイミンとの反応物であるアミノ基含有アクリル樹脂、ポリアルキレンイミンとポリアルキレンオキシドとのブロック重合体、アルキレンジクロライドとアルキレンポリアミンとの重縮合物；ポリアルキレンポリアミン、ポリアミドポリアミン、ポリアミドポリアミン・エピクロヒドリン樹脂、ポリビニルポリアミン、ポリアリルポリアミン、ポリアクリルアミドとホルマリン、アミン化合物とのマンニッヒ反応物；ビニルラクタム化合物とアクリルアミドの共重合体；ポリビニルピリジン、ポリビニルイミダゾリン、ポリアルキルアミノエチルアクリレート、キトサン、アニリンとホルマリンとの重縮合物、アルキレンジアミンとエピクロロヒドリンとの重縮合物などを挙げることができる。
本発明においては、これらのなかでも、ポリエチレンイミンおよびその誘導体は好ましく使用できる。
本発明で用いるポリイミン系樹脂の分子量は、１００以上が好ましく、特に３００〜１００万が好ましい。
【００１２】
本発明で用いるポリイミン系樹脂としては市販品を使うこともできる。市販品の例としては、ポリエチレンイミン（商品名：エポミンＰシリーズ（Ｍｎ＝７０，０００）、ＳＰシリーズ（Ｍｎ＝３００〜１０，０００）、ＲＰシリーズ、ＰＰシリーズ、日本触媒社製）、エチレンイミン変性ポリマー（アミノエチル化）（商品名：ポリメントＮＫシリーズ、ＳＫシリーズ、日本触媒社製）、多官能アジリジニル化合物（アジリジニル化）（商品名：ケミタイト、日本触媒社製）などを挙げることができる。
【００１３】
本発明で用いるエチレン・アクリル酸系樹脂とポリイミン系樹脂との配合比は特に限定されるものではないが、エチレン・アクリル酸系樹脂：ポリイミン系樹脂＝１：５〜５：１（質量比）であることが好ましく、さらに好ましくは１：４〜４：１、特に好ましくは１：２〜２：１である。エチレン・アクリル酸系樹脂の配合比が１未満であると他の特性はよいがプリントしたインキが消えにくくインキ消し適性が悪くなる恐れがある。エチレン・アクリル酸系樹脂の配合比が５を超えると筆記性および消しゴム適性が悪化する。ポリイミン系樹脂の配合比が１未満であると筆記性および消しゴム適性が悪くなる恐れがあり、ポリイミン系樹脂の配合比が５を超えると他の特性はよいがプリントしたインキが消えにくくインキ消し適性が悪くなる恐れがある。
【００１４】
本発明で用いる塗工液には、必要に応じ公知の添加剤を添加することができる。添加剤としては、例えば、粘度調整剤、老化防止剤、ｐＨ調節剤、消泡剤、各種安定剤、着色剤、グリセリンなどのロール転写性向上剤などを挙げることができる。
【００１５】
液体トナー受容層の膜厚は、薄くてよく特に限定されないが、例えば０．０１〜５．０μｍ、さらには０．０５〜１．０μｍ程度であることが好ましい。エチレン・アクリル酸系樹脂とポリイミン系樹脂との配合比にもよるが、液体トナー受容層の膜厚が０．０１μｍ未満であると安定した液体トナーの定着性が得られ難く、５．０μｍを超えると巻き取った後ブロッキングが生じる恐れがある。
【００１６】
本発明で用いる塗工液の塗工法は特に限定されるものではなく、例えば刷毛塗りなど手動で塗工する方法、あるいは自動的に塗工する方法を挙げることができる。
本発明で用いる塗工液は例えばグラビアコーター、フレキソ、エアナイフコーター、バーコーター、ブレ−ドコ−タ−、リバ−スロ−ルコ−タ−、キスロ−ルコ−タ−、キャストコ−タ−、カ−テンコ−タ−などの塗工手段によりシート基材の少なくとも一方の面の所定部に塗工し、必要に応じて乾燥、硬化することにより本発明の静電印刷用シートを製造することができる。この塗工液は各コ−タ−に適する濃度に最適な溶剤等で希釈されることもある。
【００１７】
本発明で用いるシート基材としては、通常の紙の他に、合成紙、あるいはポリエチレン、透明性を有するポリエチレンテレフタレート、ポリプロピレン、塩化ビニルなどの合成フィルムを用いることもできる。これらの合成フィルムを用いる場合には基材の表面をマット処理、コロナ処理などの表面処理を施すのが好ましい。シート基材面への塗工液の塗工量は、液体トナー受容層の膜厚が０．０１〜５．０μｍ程度になるような塗工量であればよく、特に限定されないが、例えば０．５〜３０ｇ／ｍ2 、好ましくは３〜２０ｇ／ｍ2 、さらに好ましくは５〜１５ｇ／ｍ2 である。
通常の紙としては、木材パルプと顔料を主成分として構成される。木材パルプとしてはＬＢＫＰ、ＮＢＫＰ、などの化学パルプ、ＧＰ、ＰＧＷ、ＲＭＰ、ＴＭＰ、ＣＴＭＰ、ＣＭＰ、ＣＧＰなどの機械パルプ、ＤＩＰなどの古紙パルプなどのパルプを含み、必要に応じて従来の顔料やバインダーおよびサイズ剤や定着剤、歩留り向上剤、カチオン化剤、紙力増強剤などの各種添加剤を１種以上用いて混合し、長網抄紙機、円網抄紙機、ツインワイヤ抄紙機などの各種装置で製造が可能であり、酸性、中性、アルカリ性で抄造できる。
【００１８】
静電荷現像用液体トナ−としては、特に限定はなく、従来公知のトナ−粒子を水および／または有機溶剤に分散したものを用いることができる。一般的に、トナ−粒子は、トナ−粒子を定着固定するための定着樹脂と、可視化するための着色剤、液体トナ−の電気的特性を調整するための電荷調整剤等からなる。
【００１９】
定着樹脂としては、従来、静電荷現像用液体トナ−に使用されてきた公知の樹脂を用いることができるが、特に熱可塑性樹脂が好ましく、例えば、ポリスチレン、スチレン−アクリル酸共重合体、ポリアクリル酸、ポリエチレン、エチレン−アクリル酸共重合体、エチレン−メタクリル酸共重合体、ポリプロピレン、ポリエステル、ポリウレタン、ポリアミド等を単体もしくは混合して用いることができる。
【００２０】
着色剤としては、従来、静電荷現像用液体トナ−に使用されてきた公知の顔料および／または染料を用いることができる。着色剤としては、例えば、ハンザエロ−、ベンジジンエロ−、ベンジジンオレンジ、ファ−ストレッド、ブリリアントカ−ミン３Ｂ、銅フタロシアニンブル−、フタロシアニングリ−ン、スピリットブラック、オイルブル−、アルカリブル−、ロ−ダミン６Ｂ、ニグロシン、カ−ボンプラック、ジクロロキナクリドン、イソインドリン、酸化チタンなどが挙げられる。
【００２１】
電荷調整剤としては、ナフテン酸、オクテン酸、オレイン酸、ステアリン酸等の脂肪酸の金属塩、スルホコハク酸エステルの金属塩、ポリオキシエチル化アルキルアミンのような非イオン性界面活性剤、レシチン、アマニ油などの油脂類、ポリビニルピロリドン、多価アルコ−ルの有機酸エステルなど公知の電荷調整剤を挙げることができる。
【００２２】
【実施例】
以下実施例および比較例により本発明を更に詳しく説明するが、本発明はこれら実施例に何ら制約されるものではない。
（実施例１）
エチレン・アクリル酸系樹脂（商品名：ＡＤ−３７Ｆ１（東洋モートン社製））２．５質量部（固形分）とポリエチレンイミン（商品名：エポミンＰ−１０００（日本触媒社製））２．５質量部（固形分）、それにイオン交換水を加えて固形分５質量％の本発明で用いる塗工液を調製した。調製した塗工液をワイヤーバーを使用して、フォーム上質紙（商品名：ＮＩＰ−Ｎ、５５ｋｇ（王子製紙社製））上に０．５ｇ／ｍ2 になるように塗工し、１０５℃オーブン中で熱風乾燥して本発明の液体トナー受容層を設けた静電印刷用シートを作成した。本発明のシートをデジタル印刷機（ＵｌｔｒａＳｔｒｅａｍ（Ｉｎｄｉｇｏ社製））にて液体トナー受容層上にプリントを行った。得られたプリント物について下記の試験法により（１）液体トナー定着性、（２）筆記性、（３）消しゴム適性、（４）インキ消し適性を評価し、それらの評価結果を表１に示す。
【００２３】
試験法：
（１）液体トナー定着性：プリント部に市販のセロハンテープを約１０ｃｍの長さに貼付し、重さ２ｋｇのローラ（幅５０ｍｍ）を一往復させることにより充分に貼付する。テープを貼付した試料を温度２３℃、湿度５０％の雰囲気に１時間放置した後、ゆっくりと剥離させる。そして剥離後の液体トナープリント部を観察・評価する。
評価基準：
○：プリント部が全くとられていない。
△：細かい点状にとられた跡がある。
×：プリント部が大きく剥ぎとられている。
【００２４】
（２）筆記性：液体トナー受容層上に描画試験機（鉛筆硬度：ＨＢ、描画荷重：２００ｇ）を使用して、筆記を行う。そして筆記性を評価する。
評価基準：
○：良好に筆記できる。
△：やや抵抗がある。
×：抵抗がありきれいに筆記できない。
【００２５】
（３）消しゴム適性：液体トナー受容層上に描画試験機（鉛筆硬度：ＨＢ、描画荷重：２００ｇ）を使用して、筆記を行う。そして筆記部をプラスチック消しゴムで消して評価する。
評価基準：
○：きれいに消せる。
△：やや消せず、やや跡が残る。
×：ほとんど消せない。
【００２６】
（４）インキ消し適性：液体トナー受容層上に水性の赤ペン（赤インキの万年筆）を使用して、筆記を行う。そして筆記部が充分乾いた後、市販のインキ消し剤（丸十化成社製）を使用して、インキ消し適性を評価する。
評価基準：
○：きれいに消せる。
△：やや消せず、やや跡が残る。
×：ほとんど消せない。
【００２７】
（実施例２）
実施例１で使用したエチレン・アクリル酸系樹脂を４．０質量部（固形分）にポリエチレンイミンを１．０質量部（固形分）に変更した以外は実施例１と同様にして本発明の液体トナー受容層を設けた静電印刷用シートを作成し、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００２８】
（実施例３）
実施例１で使用したエチレン・アクリル酸系樹脂を１．０質量部（固形分）にポリエチレンイミンを４．０質量部（固形分）に変更した以外は実施例１と同様にして本発明の液体トナー受容層を設けた静電印刷用シートを作成し、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００２９】
（実施例４）
実施例１で使用したエチレン・アクリル酸系樹脂を他のエチレン・アクリル酸系樹脂（商品名：ゼイクセンＡ（住友精化社製））に変更した以外は実施例１と同様にして本発明の液体トナー受容層を設けた静電印刷用シートを作成し、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００３０】
（実施例５）
実施例１で使用したポリエチレンイミンをポリエチレンイミン（商品名：エポミンＳＰ−１１０（日本触媒社製））に変更した以外は実施例１と同様にして本発明の液体トナー受容層を設けた静電印刷用シートを作成し、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００３１】
（比較例１）
フォーム上質紙に特別な塗工を行わなかった（液体トナー受容層を設けなかった）以外は実施例１と同様にして、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００３２】
（比較例２）
実施例１で使用したエチレン・アクリル酸系樹脂を５．０質量部（固形分）使用し、ポリエチレンイミンを使用しなかった以外は実施例１と同様にして比較のための液体トナー受容層を設けた静電印刷用シートを作成し、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００３３】
（比較例３）
実施例１で使用したエチレン・アクリル酸系樹脂を使用せず、ポリエチレンイミンを５．０質量部（固形分）使用した以外は実施例１と同様にして比較のための液体トナー受容層を設けた静電印刷用シートを作成し、液体トナー定着性、筆記性、消しゴム適性、インキ消し適性を評価した。
液体トナー定着性、筆記性、消しゴム適性の評価結果を表１に示す。
【００３４】
【表１】
表１から、実施例１〜５の本発明の静電印刷用シートはいずれも液体トナー定着性、筆記性、消しゴム適性、インキ消し適性に優れていることが判る。
それに対して、比較例１〜３の比較のためのシートは液体トナー定着性、筆記性、消しゴム適性、インキ消し適性の内の少なくとも１つが劣ることが判る。
【００３６】
【発明の効果】
本発明の請求項１の静電印刷用シートは、紙からなるシート基材面の所定箇所に、エチレン・アクリル酸系樹脂とポリイミン系樹脂を主成分として含む塗工液であって、前記エチレン・アクリル酸系樹脂としてアクリル酸比率が２〜３０モル％、重量平均分子量が８０００〜２００００のエチレン・アクリル酸系樹脂を用いるとともに、前記エチレン・アクリル酸系樹脂と前記ポリイミン系樹脂の配合比が、前記エチレン・アクリル酸系樹脂：前記ポリイミン系樹脂＝１：５〜５：１（質量比）である塗工液を用いて、液体トナー定着性、筆記性、消しゴム適性およびインキ消し適性に優れた液体トナー受容層を設けてなることを特徴とするものであり、
印刷生産性が高く、この塗工液を用いてシート基材（用紙）面の所定箇所に液体トナー受容層を形成すると、この液体トナー受容層は液体トナーの密着性、定着性に優れている上、この液体トナー受容層は鉛筆、水性ペン、ボールペンなどによる筆記性に優れており、また筆記後に消しゴムで良好に消すことができ、また水性ペンで筆記後に市販のインキ消し剤できれいに消すこともでき、安価であるという顕著な効果を奏する。
【図面の簡単な説明】
【図１】 本発明の静電印刷用シートの一実施形態を示す断面説明図である。
【符号の説明】
１ 本発明の静電印刷用シート
２ シート基材
３ 液体トナー受容層
４ 印字[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet for electrostatic printing.
[0002]
[Prior art]
Recently, an image forming method for a plastic film, paper or the like using an electrophotographic method has attracted attention. Since this method does not require a plate making process as is well known, it is the most suitable method for producing a small amount of various kinds of printed matter. In particular, the electrophotographic development method using a liquid toner has a high-definition and high-quality output image compared to the case of using a powder toner, and is comparable to the gravure printing method and offset printing method in terms of image quality. Reached the level.
[0003]
However, when a liquid toner is used, the paper that can be used is limited to coated paper from the viewpoint of printability, such as the problem of adhesion with liquid toner, and thus there is a problem of cost increase, and a pencil, water-based pen, There were problems such as being unable to write well with a ballpoint pen, etc., and being unable to erase well with an eraser after writing.
[0004]
[Problems to be solved by the invention]
The purpose of the present invention is to solve the conventional problems, the paper used is excellent in fixing properties of the liquid toner is not limited to the coated paper, plain paper and synthetic paper, on the like can be used a plastic film, a pencil, A liquid toner receptive layer that has excellent writing properties with water-based pens, ballpoint pens, etc., can be erased well with an eraser after writing, and can be erased neatly with a commercial ink eraser after writing with an aqueous pen. it is to provide an electrostatic printing sheet form shapes on the paper (sheet substrate).
[0005]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors can solve the above problems by using a coating liquid containing a specific acrylic acid copolymer resin and a polyimine resin as main components. The headline and the present invention were completed.
[0006]
That is,
[0007]
As described above, the coating liquid used in the present invention containing ethylene / acrylic acid resin and polyimine resin as main components has high printing productivity, and a predetermined surface of the sheet substrate (paper) surface is obtained using this coating liquid. When a liquid toner receiving layer (for example, a thin film coating) is formed at a location, this liquid toner receiving layer is excellent in adhesion and fixing properties of the liquid toner. For example, a cellophane is formed on a print portion where the liquid toner is printed on the liquid toner receiving layer. After sticking the tape, the printed part does not peel off even if the cellophane tape is peeled off, so the sheet base material used is not limited to expensive coated paper, and ordinary paper, synthetic paper, plastic film, etc. can be used. The liquid toner receptive layer has excellent writing properties with pencils, aqueous pens, ballpoint pens, etc., and can be well erased with an eraser after writing. In can also be cleanly erase it with a commercially available eraser agent after writing.
[0008]
By forming a liquid toner-receiving layer on a sheet substrate (for example, high-quality paper) using the coating liquid used in the present invention, the liquid toner is excellent in fixability, writing property, eraser suitability, and ink eraseability. An electrostatic printing sheet can be provided.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
FIG. 1 is a cross-sectional explanatory view showing an embodiment of the electrostatic printing sheet of the present invention.
In FIG. 1, the
[0010]
The ethylene / acrylic acid resin used in the present invention is a resin obtained by copolymerizing ethylene and acrylic acid, and the acrylic acid ratio is not particularly limited, but the acrylic acid ratio is 2 to 30 mol%, and the weight average molecular weight. Of approximately 8000 to 20000 is preferably used. The ethylene / acrylic acid resin is used in a form dispersed in water or dissolved in an organic solvent. However, ethylene / acrylic acid resins are usually used in a form in which acrylic acid is dispersed in water in the form of an alkali salt such as ammonia or amine or a metal salt such as sodium or zinc.
[0011]
The polyimine resin used in the present invention is not particularly limited as long as it is a polymer containing one or more of primary, secondary and tertiary amino groups in the molecular skeleton.
Specific examples of the polyimine-based resin include polyalkyleneimines such as polyethyleneimine and polypropyleneimine; polyalkyleneimines and aldehyde compounds, ketone compounds, alkyl halide compounds, isocyanate compounds, thioisocyanate compounds, active olefin compounds, and epoxies. Compound, cyanamide compound, guanidine compound, urea, thiourea, carboxy compound, acid anhydride, acyl halide compound, etc .; reaction product of carboxy-containing acrylic resin and alkylene imine, amino group-containing acrylic resin, polyalkylene Block polymer of imine and polyalkylene oxide, polycondensate of alkylene dichloride and alkylene polyamine; polyalkylene polyamine, polyamide polyamine, polyamide polyamine -Epichlorohydrin resin, polyvinyl polyamine, polyallyl polyamine, Mannich reaction product of polyacrylamide and formalin, amine compound; copolymer of vinyl lactam compound and acrylamide; polyvinyl pyridine, polyvinyl imidazoline, polyalkylaminoethyl acrylate, chitosan, aniline And a polycondensate of formalin and a polycondensate of alkylenediamine and epichlorohydrin.
Among these, polyethyleneimine and its derivatives can be preferably used in the present invention.
The molecular weight of the polyimine resin used in the present invention is preferably 100 or more, particularly preferably from 3 to 1,000,000.
[0012]
A commercially available product can also be used as the polyimine resin used in the present invention. Examples of commercially available products include polyethyleneimine (trade names: Epomin P series (Mn = 70,000), SP series (Mn = 300 to 10,000), RP series, PP series, manufactured by Nippon Shokubai Co., Ltd.), ethyleneimine Examples thereof include modified polymers (aminoethylated) (trade names: Poliment NK series, SK series, manufactured by Nippon Shokubai Co., Ltd.), polyfunctional aziridinyl compounds (aziridinylated) (trade name: Chemitite, manufactured by Nippon Shokubai Co., Ltd.), and the like.
[0013]
The blending ratio of the ethylene / acrylic acid resin and the polyimine resin used in the present invention is not particularly limited, but the ethylene / acrylic acid resin: polyimine resin = 1: 5 to 5: 1 (mass ratio). It is preferable that the ratio is 1: 4 to 4: 1, particularly preferably 1: 2 to 2: 1. When the blending ratio of the ethylene / acrylic acid resin is less than 1, other characteristics are good, but the printed ink is difficult to disappear and the ink erasing ability may be deteriorated. When the blending ratio of the ethylene / acrylic acid resin exceeds 5, the writing property and the eraser suitability deteriorate. If the blending ratio of the polyimine resin is less than 1, the writing property and the eraser suitability may be deteriorated. If the blending ratio of the polyimine resin exceeds 5, other characteristics are good, but the printed ink is difficult to disappear and is suitable for ink erasing. May get worse.
[0014]
A well-known additive can be added to the coating liquid used by this invention as needed. Examples of additives include viscosity modifiers, anti-aging agents, pH adjusters, antifoaming agents, various stabilizers, colorants, roll transferability improvers such as glycerin, and the like.
[0015]
The thickness of the liquid toner receiving layer may be thin and is not particularly limited, but is preferably about 0.01 to 5.0 μm, and more preferably about 0.05 to 1.0 μm. Although it depends on the blending ratio of the ethylene / acrylic resin and the polyimine resin, if the liquid toner receiving layer thickness is less than 0.01 μm, it is difficult to obtain a stable fixability of the liquid toner. If it exceeds, blocking may occur after winding.
[0016]
The coating method of the coating liquid used in the present invention is not particularly limited, and examples thereof include a manual coating method such as brush coating, or an automatic coating method.
The coating liquid used in the present invention is, for example, a gravure coater, flexo, air knife coater, bar coater, blade coater, reverse roll coater, kiss roll coater, cast coater, cast coater, -The electrostatic printing sheet of the present invention can be produced by coating on a predetermined portion of at least one surface of a sheet substrate by coating means such as a ten-coater, and drying and curing as necessary. it can. This coating solution each co - data - also be diluted in the optimal solvents to a concentration suitable for.
[0017]
As the sheet base material used in the present invention, synthetic paper or synthetic films such as polyethylene, transparent polyethylene terephthalate, polypropylene, and vinyl chloride can be used in addition to ordinary paper. When these synthetic films are used, the surface of the substrate is preferably subjected to a surface treatment such as a mat treatment or a corona treatment. The coating amount of the coating liquid to the sheet substrate surface may be any coating amount as the thickness of the liquid toner receptive layer is about 0.01～5.0Myuemu, but are not limited to, for example 0 0.5-30 g / m 2 , preferably 3-20 g / m 2 , more preferably 5-15 g / m 2 .
Ordinary paper is composed mainly of wood pulp and pigment. Wood pulp includes chemical pulps such as LBKP and NBKP, mechanical pulps such as GP, PGW, RMP, TMP, CTMP, CMP, and CGP, and pulps such as waste paper pulp such as DIP. Binder, sizing agent, fixing agent, yield improver, cationizing agent, paper strength enhancer, etc. are mixed using one or more kinds of additives such as long net paper machine, circular net paper machine, twin wire paper machine etc. It can be manufactured with various devices, and can be made with acid, neutral, or alkaline.
[0018]
The electrostatic toner developing liquid toner is not particularly limited, and conventionally known toner particles dispersed in water and / or an organic solvent can be used. In general, toner particles are composed of a fixing resin for fixing and fixing toner particles, a colorant for visualizing, a charge adjusting agent for adjusting electric characteristics of the liquid toner, and the like.
[0019]
As the fixing resin, known resins that have been conventionally used for liquid toners for electrostatic charge development can be used, and thermoplastic resins are particularly preferable. For example, polystyrene, styrene-acrylic acid copolymer, polyacrylic resin, and the like. Acid, polyethylene, ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, polypropylene, polyester, polyurethane, polyamide and the like can be used alone or in combination.
[0020]
As the colorant, known pigments and / or dyes that have been conventionally used in liquid toners for electrostatic charge development can be used. Examples of the colorant include Hansaero, Benzidine Aero, Benzidine Orange, Fast Red, Brilliant Carmine 3B, Copper Phthalocyanine Blue, Phthalocyanine Green, Spirit Black, Oil Blue, Alkaline Blue, and Rhodamine. 6B, nigrosine, carbon black, dichloroquinacridone, isoindoline, titanium oxide and the like.
[0021]
Examples of charge control agents include metal salts of fatty acids such as naphthenic acid, octenoic acid, oleic acid, stearic acid, metal salts of sulfosuccinic acid esters, nonionic surfactants such as polyoxyethylated alkylamines, lecithin, and linseed. Examples of known charge control agents include oils and fats such as oil, polyvinyl pyrrolidone, and organic acid esters of polyhydric alcohols.
[0022]
【Example】
Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples.
Example 1
Ethylene / acrylic acid resin (trade name: AD-37F1 (manufactured by Toyo Morton)) 2.5 parts by mass (solid content) and polyethyleneimine (trade name: Epomin P-1000 (manufactured by Nippon Shokubai Co., Ltd.)) 2.5 Mass parts (solid content) and ion-exchanged water were added thereto to prepare a coating liquid used in the present invention having a solid content of 5% by mass. Using the wire bar, the prepared coating solution was coated on a foam fine paper (trade name: NIP-N, 55 kg (manufactured by Oji Paper Co., Ltd.)) so as to be 0.5 g / m 2. The sheet for electrostatic printing provided with the liquid toner receiving layer of the present invention was prepared by drying with hot air in an oven at ° C. The sheet of the present invention was printed on the liquid toner receiving layer with a digital printer (UltraStream (Indigo)). The obtained printed matter was evaluated for (1) liquid toner fixability, (2) writability, (3) eraser suitability, and (4) ink erasability by the following test methods, and the evaluation results are shown in Table 1. .
[0023]
Test method:
(1) Liquid toner fixing property: A commercially available cellophane tape is applied to the print portion to a length of about 10 cm, and is sufficiently applied by reciprocating a roller of 2 kg in weight (width 50 mm). The sample with the tape attached is left in an atmosphere at a temperature of 23 ° C. and a humidity of 50% for 1 hour, and then slowly peeled off. Then, the liquid toner print part after peeling is observed and evaluated.
Evaluation criteria:
○: No print portion is taken.
Δ: There are traces taken in fine dots.
X: The print part is largely peeled off.
[0024]
(2) Writability: Written using a drawing tester (pencil hardness: HB, drawing load: 200 g) on the liquid toner receiving layer. And writeability is evaluated.
Evaluation criteria:
○: Can be written well.
Δ: Some resistance.
X: There is resistance and writing cannot be done neatly.
[0025]
(3) Eraser suitability: Writing is performed on the liquid toner receiving layer using a drawing tester (pencil hardness: HB, drawing load: 200 g). Then, the writing part is evaluated with a plastic eraser.
Evaluation criteria:
○: Can be erased neatly.
Δ: Slightly unerasable and a slight mark remains.
×: Can hardly be erased.
[0026]
(4) Ink erasability: A water-based red pen (red ink fountain pen) is used on the liquid toner receiving layer. Then, after the writing part is sufficiently dried, the ink erasability is evaluated using a commercially available ink erasing agent (manufactured by Maru Kasei Co., Ltd.).
Evaluation criteria:
○: Can be erased neatly.
Δ: Slightly unerasable and a slight mark remains.
×: Can hardly be erased.
[0027]
(Example 2)
The ethylene / acrylic acid resin used in Example 1 was changed to 4.0 parts by mass (solid content) and polyethyleneimine was changed to 1.0 part by mass (solid content). Electrostatic printing sheets provided with a liquid toner receiving layer were prepared and evaluated for liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0028]
Example 3
The ethylene / acrylic acid resin used in Example 1 was changed to 1.0 part by mass (solid content) and polyethyleneimine was changed to 4.0 parts by mass (solid content). Electrostatic printing sheets provided with a liquid toner receiving layer were prepared and evaluated for liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0029]
Example 4
The ethylene / acrylic acid resin used in Example 1 was changed to another ethylene / acrylic acid resin (trade name: Zeixen A (manufactured by Sumitomo Seika Co., Ltd.)). Electrostatic printing sheets provided with a liquid toner receiving layer were prepared and evaluated for liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0030]
(Example 5)
The electrostatic image provided with the liquid toner receiving layer of the present invention was the same as in Example 1 except that the polyethyleneimine used in Example 1 was changed to polyethyleneimine (trade name: Epomin SP-110 (manufactured by Nippon Shokubai Co., Ltd.)). A printing sheet was prepared and evaluated for liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0031]
(Comparative Example 1)
Liquid toner fixability, writing property, eraser suitability, and ink erasability were evaluated in the same manner as in Example 1 except that no special coating was applied to the fine foam paper (no liquid toner receiving layer was provided).
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0032]
(Comparative Example 2)
A liquid toner receptive layer for comparison was prepared in the same manner as in Example 1 except that 5.0 parts by mass (solid content) of the ethylene / acrylic acid resin used in Example 1 was used and polyethyleneimine was not used. The provided electrostatic printing sheet was prepared and evaluated for liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0033]
(Comparative Example 3)
A liquid toner receiving layer for comparison was provided in the same manner as in Example 1 except that the ethylene / acrylic acid resin used in Example 1 was not used and 5.0 parts by mass (solid content) of polyethyleneimine was used. A sheet for electrostatic printing was prepared and evaluated for liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
Table 1 shows the evaluation results of liquid toner fixing property, writing property, and eraser suitability.
[0034]
[Table 1]
From Table 1, it can be seen that the electrostatic printing sheets of Examples 1 to 5 of the present invention are all excellent in liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
On the other hand, it can be seen that the comparative sheets of Comparative Examples 1 to 3 are inferior in at least one of liquid toner fixing property, writing property, eraser suitability, and ink eraser suitability.
[0036]
【The invention's effect】
The electrostatic printing sheet according to
High print productivity, this coating solution using to form a liquid toner receptive layer at a predetermined position of the sheet substrate (paper) surface, the liquid toner receiving layer excellent adhesion of the liquid toner, the fixability In addition , this liquid toner receptive layer has excellent writing properties with pencils, water-based pens, ballpoint pens, etc., and can be erased well with an eraser after writing, and can be erased neatly with a commercially available ink eraser after writing with an aqueous pen. It is also possible to produce a remarkable effect that it is inexpensive.
[Brief description of the drawings]
FIG. 1 is a cross-sectional explanatory view showing an embodiment of an electrostatic printing sheet of the present invention.
[Explanation of symbols]
DESCRIPTION OF
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| JP2001398345A JP3849054B2 (en) | 2001-12-27 | 2001-12-27 | Electrostatic printing sheet |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001398345A JP3849054B2 (en) | 2001-12-27 | 2001-12-27 | Electrostatic printing sheet |
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| JP2003195548A JP2003195548A (en) | 2003-07-09 |
| JP3849054B2 true JP3849054B2 (en) | 2006-11-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AU2003220949A1 (en) * | 2003-03-20 | 2004-10-11 | Oji Paper Co., Ltd. | Recording material for use in electrophotography using liquid toner |
| JP7321861B2 (en) * | 2019-09-26 | 2023-08-07 | キヤノン株式会社 | liquid developer |
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