EP0442507B1 - Procédé pour le durcissement et la fixation de particules émulsifiées et feuille d'enregistrement sans carbone sensible à la pression l'utilisant - Google Patents

Procédé pour le durcissement et la fixation de particules émulsifiées et feuille d'enregistrement sans carbone sensible à la pression l'utilisant Download PDF

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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
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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
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German (de)
English (en)
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EP0442507A1 (fr
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
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Publication of EP0442507A1 publication Critical patent/EP0442507A1/fr
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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:

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  • Color Printing (AREA)

Claims (9)

  1. Procédé de durcissement et de fixation de particules émulsifiées contenues dans une émulsion comprenant une matière à durcir par une lumière ou un rayonnement, caractérisé par une fixation, sur un substrat, des particules émulsifiées dont la dimension moyenne de particule est de 0,1 à 5 »m en durcissant par une exposition à une lumière ou un rayonnement, dans un procédé de revêtement, ladite matière à durcir par une lumière ou un rayonnement.
  2. Procédé selon la revendication 1, caractérisé en ce que la quantité de matières à durcir par une lumière ou un rayonnement est comprise dans une plage de 1 à 20% en poids, sur la base desdites particules émulsifiées.
  3. Procédé selon l'une des revendications 1 ou 2, caractérisé en ce que ladite émulsion comprend, en plus de ladite matière à durcir par une lumière ou un rayonnement, un initiateur de durcissement par la lumière et un sensibilisateur.
  4. Feuille d'enregistrement sans carbone sensible à la pression comprenant, sur un substrat, des particules émulsifiées dont la dimension moyenne de particule est de 0,1 à 5 »m et qui comprennent une matière durcie par une lumière ou un rayonnement et une matière tinctoriale incolore pour un papier sans carbone sensible à la pression,
       les particules étant contenues dans une émulsion dans laquelle la couche continue comprend un agent de durcissement superficiel de revêtement composé d'au moins un pigment, ou charge, blanc, d'un agent tampon pour des feuilles d'enregistrement sensibles à la pression et d'un liant,
       la feuille d'enregistrement pouvant être obtenue en fixant, dans un processus de revêtement, lesdites particules émulsifiées sur le substrat en durcissant par une exposition à une lumière ou à un rayonnement une matière à durcir par la lumière ou par un rayonnement.
  5. Feuille d'enregistrement sans carbone sensible à la pression selon la revendication 4, caractérisée en ce que la quantité de ladite matière à durcir par une lumière ou un rayonnement est comprise dans une plage de 1 à 20% en poids, sur la base desdites particules émulsifiées.
  6. Feuille d'enregistrement sans carbone sensible à la pression selon l'une des revendications 4 ou 5, caractérisée en ce que ladite émulsion comprend, en plus de ladite matière à durcir par une lumière ou un rayonnement, un initiateur de durcissement à la lumière et un sensibilisateur.
  7. Feuille d'enregistrement sans carbone sensible à la pression selon la revendication 6, caractérisée en ce que la quantité dudit initiateur de durcissement par la lumière est comprise entre 0,1 et 20% en poids, sur la base de ladite matière à durcir par la lumière.
  8. Feuille d'enregistrement sans carbone sensible à la pression selon l'une quelconque des revendications 4 à 7, caractérisée en ce que ledit liant est un liant à durcir par une lumière ou un rayonnement.
  9. Feuille d'enregistrement sans carbone sensible à la pression selon l'une quelconque des revendications 4 à 8, caractérisée en ce que ledit pigment comprend au moins 10% en poids de dioxyde de titane, sur la base dudit pigment et de ladite charge.
EP19910102117 1990-02-15 1991-02-14 Procédé pour le durcissement et la fixation de particules émulsifiées et feuille d'enregistrement sans carbone sensible à la pression l'utilisant Expired - Lifetime EP0442507B1 (fr)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910102117 Expired - Lifetime EP0442507B1 (fr) 1990-02-15 1991-02-14 Procédé pour le durcissement et la fixation de particules émulsifiées et feuille d'enregistrement sans carbone sensible à la pression l'utilisant

Country Status (3)

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

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

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