EP0442507B1 - Verfahren zum Härten und Abbinden von emulgierten Partikeln und eine kohlenstoffreie druckempfindliche Aufzeichnungsschicht, in der diese Partikel verwendet werden - Google Patents

Verfahren zum Härten und Abbinden von emulgierten Partikeln und eine kohlenstoffreie druckempfindliche Aufzeichnungsschicht, in der diese Partikel verwendet werden Download PDF

Info

Publication number
EP0442507B1
EP0442507B1 EP19910102117 EP91102117A EP0442507B1 EP 0442507 B1 EP0442507 B1 EP 0442507B1 EP 19910102117 EP19910102117 EP 19910102117 EP 91102117 A EP91102117 A EP 91102117A EP 0442507 B1 EP0442507 B1 EP 0442507B1
Authority
EP
European Patent Office
Prior art keywords
photo
radiation
sensitive recording
curing
curable material
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
Application number
EP19910102117
Other languages
English (en)
French (fr)
Other versions
EP0442507A1 (de
Inventor
Masahiro Sakamoto
Akira Hasegawa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Paper Industries Co Ltd
Original Assignee
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Publication of EP0442507A1 publication Critical patent/EP0442507A1/de
Application granted granted Critical
Publication of EP0442507B1 publication Critical patent/EP0442507B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B41M5/124—Duplicating or marking methods; Sheet materials for use therein using pressure to make a masked colour visible, e.g. to make a coloured support visible, to create an opaque or transparent pattern, or to form colour by uniting colour-forming components
    • B41M5/1246—Application of the layer, e.g. by printing

Definitions

  • the present invention relates to a process for curing and setting emulsified particles using a new coating solution in which a remarkably superior productivity is achieved. More specifically, the present invention relates to a carbonless pressure-sensitive recording sheet using this process.
  • microcapsule formation is known as an effective means for curing and setting emulsified particles.
  • the content, the so-called core material, of microcapsules includes pharmaceuticals, agricultural chemicals, perfumes, dyestuffs, liquid crystals, temperature-indicating materials, adhesives and the like.
  • the microcapsules are used in a broad field with the view to the curing of a core material, the control of the release of a core material, the control of a reaction, the solidification of a liquid and the like.
  • One of the applications in large scales lies in the field of carbonless pressure-sensitive recording sheets, wherein the process for producing microcapsules requires high control techniques.
  • the coating solution produced from the microcapsules is applied onto a flexible substrate by using various coating means.
  • various coating means air knife coater, bar coater, curtain coater, blade coater and the like are useful if a large amount of coating is to be applied but are not suitable for a partial coating matching to a minor production of various kinds.
  • the partial printing with silkscreen system, gravure system, flexo system, etc. does not provide a sufficient performance in point of the coating characteristics of the microcapsule dispersion formed in a hydrophilic medium, and is not suitable for the minor production of many kinds. As a result, these are not suitable to meet various quality requirements of a minor production in using microcapsule-forming process.
  • the transfer recording papers using no microcapsule-forming process are employed in wide fields, as seen in back-carbon papers.
  • These socalled carbonless pressure-sensitive recording sheets using no microcapsule-forming process are as follows.
  • Japanese Patent Laid-Open Application No. 57-77410 discloses a process for producing a carbonless pressure-sensitive recording material providing, between a flexible substrate and an upper coating layer of a curing layer, an intermediate layer of porous filling substances impregnated in a liquid medium in which a colorless or pale-colored dye precursor is dissolved or dispersed.
  • the size of the emulsified particles varies with the uses,but is most preferably in the range of 0.1-5».
  • a size of less than 0.1» provides an inferior color-forming effect, which tends to cause troubles in obtaining multiple copies.
  • a size of more than 5» causes troubles in stabilizing the emulsified particles in the coating, so that an uniform coating is difficult to achieve.
  • a particle size of more than 5» on a substrate is not preferable, since it causes a smudge in the color-formation by unusual pressure.
  • binders photo- or radiation-curable binders are effective, in addition to binders for pressure-sensitive recording sheets.
  • the usual binders include, for example, water-soluble natural polymers such as gelatin, albumine, caseins, starch powder, celluloses, gums and the like; and water-soluble synthetic polymers such as polyvinyl alcohol, polyvinyl pyrrolidone, polyacrylic acid copolymers, maleic anhydride copolymers,polyacrylic amide and the like.
  • the photo- or radiation-curable binders include, for example, partial cinnamoyl esters of polyvinyl alcohol, amylose, starch, alginic acid and the like; cinnamylidene acetic ester; cyanocinnamylidene acetic ester; water-soluble acrylic esters; polyalkylene glycol acrylamides; and the like.
  • the above binders can be used alone or in combination.
  • the obtained emulsified substance can be applied onto a substrate by mass production coaters, for example, air knife coater, roll coater, blade coater, bar coater, curtain coater, etc.
  • the coating can be applied by a printer, such as gravure-, flexo-, screen- or letterpress-printers fitted with a light-irradiation or radiation installation.
  • these curable material is promptly polymerized to form a cure-film, which cures and sets emulsified particles in an emulsion.
  • the above coating solution was coated on a fine paper of 40g/m2 by means of a Meyer bar to prepare a coated paper having a coating amount of 3.4 g/m2. Then, the coated paper was irradiated with UV rays in an irradiation distance of 10 cm and in a conveyer speed of 1.5 m/min. by means of a 3 kW high voltage metal halide lamp to cure the film. Thus, a top sheet for carbonless pressure-sensitive recording sheets was obtained.
  • the process and test results are summarized in Fig. 1 and Table 1.
  • the emulsion of Example 2 was prepared in the same manner as the emulsion of Example 1 but without the photo-curing initiator.
  • the above coating solution was coated on a fine paper of 40 g/m2 by means of a Meyer bar to prepare a coated paper having a coating amount of 3.5 g/m2. Then, a film curing treatment was made using an acceleration voltage of 175 kV, an electron beam amount of 5 M rad and an irradiation speed of 20 m/min. to prepare a top sheet for carbonless pressure-sensitive recording papers.
  • a film curing treatment was made using an acceleration voltage of 175 kV, an electron beam amount of 5 M rad and an irradiation speed of 20 m/min.
  • Example 4 The emulsion of Example 4 was prepared in the same manner as in Example 1 except that the hydrophilic emulsion of Example 1 was emulsified to an average particle size of 0.5» .
  • the above coating solution was coated on a fine paper of 40 g/m2 in a coating amount of 1.5g/m2 by means of a flexo printer installed with an UV-irradiation equipment (Irradiation condition: 3 kW metal halide lamp) under a coating speed of 5 m/min.
  • the coating was irradiated with UV rays in an irradiation distance of 7 cm to cure a film.
  • a particle coated top sheet for carbonless pressure-sensitive recording papers was obtained.
  • the process and test results are summarized in Fig. 1 and Table 1.
  • a melamine-formaldehyde prepolymer which was produced from 30 parts of formalin and 10 parts of melamine at 60°C, was added to the above emulsion.
  • the temperature of the system was held at 60-70°C for 3 hours.
  • the system was adjusted to a pH-value of 7.5 by adding a 28% aqueous ammonia solution thereto to prepare a microcapsule dispersion. The time required for preparing this solution was 5 hours.
  • the coating solution was coated on a base paper of 40 g/m2 in a coating amount of 3.5 g/m2 by means of a Meyer bar, and dried in an oven at 105°C for 60 sec. to prepare a top sheet for pressure-sensitive recording papers.
  • the process and test results are summarized in Fig. 1 and Table 1.
  • Example 1 Example 2
  • Example 3 Example 4 Comparative Example 1 Color-forming ability 0.70 0.75 0.73 0.67 0.66 Smudge caused by wearing 3.8 3.6 3.6 3.4 3.3 Smudge caused by static pressure 5.8 5.3 5.4 5.6 5.7 Printability good good good bad Total process-time 2Hr12m 2Hr11m 2Hr11m 2Hr13m 7Hr13m
  • the setting of the emulsified particles which had been achieved only by an encapsulation process, was performed very simply in the present invention.
  • the present invention provides carbonless pressure-sensitive recording papers which, as compared to conventional pressure-sensitive recording paper have equal copying suitablity and can be prepared in a simpler process and in a shorter time.
  • the partial coating of the carbonless pressure-sensitive recording sheet is possible owing to the improvement of printability.
  • the present invention provides the following effects:

Landscapes

  • Color Printing (AREA)

Claims (9)

  1. Verfahren zum Härten und Abbinden emulgierter Partikel, die in einer Emulsion enthalten sind, welche ein durch Licht oder Strahlung härtbares Material umfaßt, dadurch gekennzeichnet, daß man emulgierte Partikel mit einer mittleren Teilchengröße von 0,1 - 5 »m auf einem Substrat durch Härten des erwähnten durch Licht oder Strahlung härtbaren Materials unter Lichtbestrahlung oder Strahlungseinwirkung in einem Beschichtungsverfahren abbindet.
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Menge des durch Licht oder Strahlung härtbaren Materials im Bereich von 1 - 20 Gew.-%, bezogen auf die erwähnten emulgierten Partikel, liegt.
  3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die erwähnte Emulsion zusätzlich zu dem durch Licht oder Strahlung härtbaren Material einen Lichthärtungsinitiator und ein Sensibilisierungsmittel umfaßt.
  4. Kohlefreies, druckempfindliches Aufzeichnungsblatt, das auf einem Substrat emulgierte Partikel umfaßt, welche eine mittlere Teilchengröße von 0,1 bis 5 »m aufweisen und ein licht- oder strahlungsgehärtetes Material und einen farblosen Farbstoff für ein kohlefreies, druckempfindliches Aufzeichnungspapier umfassen,
    wobei die Partikel in einer Emulsion enthalten sind, deren kontinuierliche Schicht ein Oberflächenschicht-Behandlungsmittel aus wenigstens einem Weißpigment oder Füllstoff, einen Puffer für druckempfindliche Aufzeichnungsblätter und ein Bindemittel umfaßt,
    wobei das Aufzeichnungsblatt erhältlich ist durch Abbinden der emulgierten Partikel auf dem Substrat, indem man ein durch Licht oder Strahlung härtbares Material unter Lichtbestrahlung oder Strahlungseinwirkung in einem Beschichtungsverfahren härtet.
  5. Kohlefreies, druckempfindliches Aufzeichnungsblatt nach Anspruch 4, dadurch gekennzeichnet, daß die Menge des durch Licht oder Strahlung härtbaren Materials im Bereich von 1 - 20 Gew.-%, bezogen auf die erwähnten emulgierten Partikel, liegt.
  6. Kohlefreies, druckempfindliches Aufzeichnungsblatt nach Anspruch 4 oder 5, dadurch gekennzeichnet, daß die Emulsion zusätzlich zu dem erwähnten durch Licht oder Strahlung härtbaren Material einen Lichthärtungsinitiator und ein Sensibilisierungsmittel umfaßt.
  7. Kohlefreies, druckempfindliches Aufzeichnungsblatt nach Anspruch 6, dadurch gekennzeichnet, daß die Menge an dem erwähnten Lichthärtungsinitiator 0,1 - 20 Gew.-%, bezogen auf das erwähnte lichthärtbare Material, beträgt.
  8. Kohlefreies, druckempfindliches Aufzeichnungsblatt nach einem der Ansprüche 4 bis 7, dadurch gekennzeichnet, daß es sich bei dem erwähnten Bindemittel um ein durch Licht oder Strahlung härtbares Bindemittel handelt.
  9. Kohlefreies, druckempfindliches Aufzeichnungsblatt nach einem der Ansprüche 4 bis 8, dadurch gekennzeichnet, daß das erwähnte Pigment wenigstens 10 Gew.-% Titandioxid, bezogen auf das Pigment und den Füllstoff, umfaßt.
EP19910102117 1990-02-15 1991-02-14 Verfahren zum Härten und Abbinden von emulgierten Partikeln und eine kohlenstoffreie druckempfindliche Aufzeichnungsschicht, in der diese Partikel verwendet werden Expired - Lifetime EP0442507B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP34707/90 1990-02-15
JP3470790 1990-02-15

Publications (2)

Publication Number Publication Date
EP0442507A1 EP0442507A1 (de) 1991-08-21
EP0442507B1 true EP0442507B1 (de) 1995-05-17

Family

ID=12421823

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102117 Expired - Lifetime EP0442507B1 (de) 1990-02-15 1991-02-14 Verfahren zum Härten und Abbinden von emulgierten Partikeln und eine kohlenstoffreie druckempfindliche Aufzeichnungsschicht, in der diese Partikel verwendet werden

Country Status (3)

Country Link
EP (1) EP0442507B1 (de)
AU (1) AU630273B2 (de)
DE (1) DE69109701T2 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9521945D0 (en) * 1995-10-26 1996-01-03 Columbia Ribbon Mfg Method of forming layer on substrate and article formed thereby

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1127377B (de) * 1960-04-14 1962-04-12 Pelikan Werke Wagner Guenther Verfahren zur Herstellung eines UEbertragungsblattes fuer Aufzeichnungs- und Vervielfaeltigungszwecke mit Farbreaktions-Komponenten
GB1176468A (en) * 1965-12-20 1970-01-01 Appleton Coated Paper Company Method for manufacturing of Dual-Coated Manifold Sheet with Pressure-Repturable Materials
US3472674A (en) * 1966-07-13 1969-10-14 Mead Corp Pressure sensitive paper and method of producing same
NO771012L (no) * 1976-05-07 1977-11-08 Mead Corp Karbonfritt gjennomslagspapir og fremgangsm}te for fremstilling derav
JPS62103186A (ja) * 1985-10-31 1987-05-13 Teikoku Ink Seizo Kk 感圧複写紙及びその製造方法

Also Published As

Publication number Publication date
EP0442507A1 (de) 1991-08-21
AU630273B2 (en) 1992-10-22
AU7026791A (en) 1991-08-22
DE69109701D1 (de) 1995-06-22
DE69109701T2 (de) 1996-02-22

Similar Documents

Publication Publication Date Title
US4162165A (en) Process for the production of microcapsular coating compositions containing pigment particles and compositions produced thereby
US20020185035A1 (en) Thermosensitive color-changing dry offset ink and a printed material using the same
US3625736A (en) Pressure-sensitive copying unit containing granular resinous material and method of making
US4742043A (en) Heat-sensitive recording material
JPS6042040B2 (ja) 放射線硬化性結合剤中にて形成されたマイクロカプセルを用いる感圧性無炭素型コピーシートの製法
US4228216A (en) Production of radiation curable microcapsular coating compositions, pressure-sensitive transfer paper and its production
EP0980026A1 (de) Bilderzeugungsmaterial und trockenverfahren zur bilderzeugung
US5238900A (en) Heat-sensitive recording material
US4688060A (en) Pressure sensitive manifold paper
DE69316294T2 (de) Aufzeichnungsmaterial
EP0442507B1 (de) Verfahren zum Härten und Abbinden von emulgierten Partikeln und eine kohlenstoffreie druckempfindliche Aufzeichnungsschicht, in der diese Partikel verwendet werden
US4230495A (en) Process for producing a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder
CA1095717A (en) Process for the production of radiation curable coating compositions containing microcapsules
JPS61291179A (ja) 感熱記録材料
JP2759936B2 (ja) 乳化粒子を保護固定化する方法並にこの方法を用いたノーカーボン感圧複写紙
US4191404A (en) Process for producing a pressure-sensitive carbonless copy sheet using microcapsules formed in situ in a radiation curable binder
JPH0437797B2 (de)
DE4012184C1 (de)
GB2052588A (en) Process for Producing Pressure- Sensitive Copying Paper
JPH0151820B2 (de)
JPH0789236A (ja) 複合感熱記録体
JPS6059874B2 (ja) 新規な放射線硬化性マイクロカプセル被覆用組成物の製法
EP0375847B1 (de) Beschichtungsmasse für druckempfindliche Aufzeichnungsblätter und ein damit erhältliches druckempfindliches Aufzeichnungsblatt
JP3139638B2 (ja) 感熱記録体
JPH02227284A (ja) 感熱記録体

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB

17P Request for examination filed

Effective date: 19920220

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: NIPPON PAPER INDUSTRIES CO., LTD.

17Q First examination report despatched

Effective date: 19931228

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REF Corresponds to:

Ref document number: 69109701

Country of ref document: DE

Date of ref document: 19950622

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030210

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030212

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20030227

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20040901

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20040214

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041029

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST