EP0310141B2 - Mehrfach zuverwendendes druckempfindliches Übertragungs- und Aufzeichnungsmedium - Google Patents

Mehrfach zuverwendendes druckempfindliches Übertragungs- und Aufzeichnungsmedium Download PDF

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Publication number
EP0310141B2
EP0310141B2 EP88116853A EP88116853A EP0310141B2 EP 0310141 B2 EP0310141 B2 EP 0310141B2 EP 88116853 A EP88116853 A EP 88116853A EP 88116853 A EP88116853 A EP 88116853A EP 0310141 B2 EP0310141 B2 EP 0310141B2
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EP
European Patent Office
Prior art keywords
recording media
weight
parts
liquid ink
binder 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
EP88116853A
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English (en)
French (fr)
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EP0310141A1 (de
EP0310141B1 (de
Inventor
Masami Shini
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.)
Fujicopian Co Ltd
Original Assignee
Fuji Kagakushi Kogyo Co Ltd
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Priority claimed from JP59146524A external-priority patent/JPS6124486A/ja
Priority claimed from JP19537484A external-priority patent/JPS6172584A/ja
Application filed by Fuji Kagakushi Kogyo Co Ltd filed Critical Fuji Kagakushi Kogyo Co Ltd
Priority claimed from EP19850108569 external-priority patent/EP0168045B1/de
Publication of EP0310141A1 publication Critical patent/EP0310141A1/de
Application granted granted Critical
Publication of EP0310141B1 publication Critical patent/EP0310141B1/de
Publication of EP0310141B2 publication Critical patent/EP0310141B2/de
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Expired - Lifetime legal-status Critical Current

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    • 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
    • B41M5/10—Duplicating or marking methods; Sheet materials for use therein by using carbon paper or the like

Definitions

  • the present invention is a divisional application of EP-application No. 85 108 569.6 (EP-A-0 168 045).
  • the present invention relates to a multiple-use pressure-sensitive transfer recording media. More particularly, it relates to a multiple-use pressure-sensitive transfer recording media for use in over-strike or multi-strike on impact type typewriters or printers.
  • a recording media is advanced by a pitch of substantially the same as or somewhat longer than the character width with each strike and the direction of the travel of the recording media is switched upon each passage of the full length of the recording media.
  • the same position thereof is struck plural times by the typeface or the like.
  • a recording media is advanced by a pitch of shorter than the character width, for instance, 1/5 of the character width, with each strike, so that a portion of each strike is effected over regions which have been previously struck and the same position of the recording media receives a plurality of impacts during a single pass.
  • the recording media is discarded after only a single pass.
  • Such multiple-use pressure-sensitive transfer recording media which have been known heretofore include a recording media which comprises a foundation and a finely porous layer on the foundation, the porous layer being composed of minute porous particles and a binder material for bonding the porous particles to each other, and containing a liquid ink paste incompatible with the binder material (see Japanese Unexamined Patent Publication No. 58-29694).
  • PVC/PVA copolymers as binders in multiple-use pressure sensitive recording materials is disclosed in for example JP-A-58-36481 and JP-A-58-201690.
  • the lowering of the optical density of the image with increasing number of strikes in the same position is less sharp than that in the case of a conventional multiple-use pressure-sensitive transfer recording media wherein no porous particles are used, whereby providing a better over-strike or multi-strike capability.
  • the finely porous layer is readily broken upon impact of the typeface or the like so that portions of the porous layer are transferred to a receiving paper together with the liquid ink, which causes dark spots or stains in the image.
  • Another object of the invention is to provide a multiple-use pressure-sensitive transfer recording media which has a finely porous layer which is not readily broken by impact upon repeated strikes at the same position and the same position of which can be used many times for transferring the ink onto a receiving paper.
  • Still another object of the invention is to provide a multiple-use pressure-sensitive transfer recording media which has both advantages mentioned above.
  • the present invention provides a multiple-use pressure-sensitive transfer recording media which comprises a foundation and a finely porous layer provided on the foundation, said porous layer comprising minute porous particles and a binder material for bonding the porous particles to each other and containing a liquid ink paste substantially incompatible with the binder material, said binder material being a vinyl chloride-vinyl acetate copolymer comprising 4 to 7 parts by weight of vinyl chloride and 5 parts by weight of vinyl acetate and having an average degree of polymerization of 700 to 950.
  • One embodiment of the present invention is a multiple-use pressure-sensitive transfer recording media which comprises a foundation and a finely porous layer provided on the foundation, said porous layer comprising minute porous particles and a binder material for bonding the porous particles to each other and containing a liquid ink paste substantially incompatible with the binder material, said liquid ink paste containing as a coloring agent a pigment, and an oil-soluble dye in a state that it is dissolved in a liquid fatty acid, said liquid ink paste having a viscosity of not less than 300 cP and less than 4,000 cP at ordinary temperature, said binder material being a vinyl chloride-vinyl acetate copolymer comprising 4 to 7 parts by weight of vinyl chloride and 5 parts by weight of vinyl acetate.
  • the present invention is characterised in that a vinyl chloride-vinyl acetate copolymer containing 4 to 7 parts by weight of vinyl chloride per 5 parts by weight of vinyl acetate is used as the binder material for bonding the porous particles to each other.
  • the specific vinyl chloride-vinyl acetate copolymer has appropriate softness and toughness as the binder material for bonding the porous particles to each other.
  • the obtained porous layer has appropriate softness and toughness without brittleness. Accordingly, the porous layer is not readily broken upon impact of typeface or the like for a multiplicity of strikes, which ensures repeated use of the same position of the recording media many times.
  • the multiple-use pressure-sensitive transfer recording media of the present invention is used preferably as an over-strike ribbon. Of course, it also is used preferably as a multi-strike ribbon.
  • a multiple-use pressure-sensitive transfer recording media according to the present invention can be prepared in the following manner:
  • Components for a liquid ink paste including coloring agent, viscosity-adjusting agent and, optionally, wetting agent and the like were mixed to give a liquid ink paste.
  • the liquid ink paste is mixed and blended with components for a finely porous layer including porous powder and binder material, and a volatile solvent.
  • the thus obtained dispersion is applied onto one surface of a foundation in a coating amount (the value after dried, hereinafter the same) of 10 to 30 g/m2, preferably 15 to 30 g/m2 by means of a coater or the like and dried to form an ink-containing porous layer wherein the liquid ink paste is contained in a finely porous layer composed of the porous powder and the binder material.
  • a solution of an oil-soluble dye in a liquid fatty acid in combination with a pigment can be used as a coloring agent for the liquid ink past for example.
  • the liquid fatty acid is preferably higher fatty acids, and mixtures thereof.
  • the liquid fatty acid include, for instance, oleic acid, isostearic acid, and their analogues.
  • the isostearic acid which can be used in the invention is a liquid isostearic acid which is composed of a major amount of isostearic acid and minor amounts of its homologues. Any liquid isostearic acid of technical grade can be used. Those liquid fatty acids may be used singly or as admixtures of two or more kinds thereof.
  • the liquid fatty acid is used preferably in an amount of 1 to 30 % by weight on the basis of the total amount of the liquid ink paste.
  • oil-soluble dyes can be used in the present invention.
  • the oil-soluble dye include, for instance, Nigrosine Base, Spirit Black, Special Black, Victoria Blue Base and Methyl Violet Base. Those oil-soluble dyes may be used singly or as admixtures of two or more kinds thereof.
  • the oil-soluble dye is used preferably in an amount of 1 to 10 % by weight on the basis of the total amount of the liquid ink paste.
  • Examples of the coloring pigment used in the present invention are carbon blacks and black toner, and the like.
  • Typical examples of the carbon black are Printex 25 (the commercial name of a coloring carbon black made by DEGUSSA), Mogul L (the commercial name of a coloring carbon black made by Cabot Corp.), RAVEN (the commercial name of a coloring carbon black made by Columbia & Carbon Corp.).
  • Those pigments may be used singly or as admixtures of two or more kinds thereof.
  • the pigment is used preferably in an amount of 1 to 40 % by weight, more preferably 20 to 40 % by weight, on the basis of the total amount of the liquid ink paste.
  • the liquid ink paste may include a wetting agent and a viscosity-adjusting agent in addition to the above-mentioned components.
  • wetting agent any usual wetting agent can be used in the present invention.
  • the wetting agent are sorbitan fatty acid esters such as sorbitan monostearate, sorbitan monoisostearate and sorbitan monooleate, lecithin, and the like.
  • sorbitan fatty acid esters such as sorbitan monostearate, sorbitan monoisostearate and sorbitan monooleate, lecithin, and the like.
  • Those wetting agents may be used singly or as admixtures of two or more kinds thereof.
  • the wetting agent is used in an amount of 3 to 30 % by weight, more especially 5 to 25 % by weight, on the basis of the total amount of the liquid ink paste.
  • any usual viscosity-adjusting agent can be used in the present invention.
  • the viscosity-adjusting agent are vegetable oils such as rapeseed oil, soybean oil and castor oil; mineral oils such as vitrea oil and jet oil; coldproof plasticizers such as di(2-ethylhexyl) adipate (hereinafter referred to as "DOA"), di (2-ethylhexyl) sebacate (hereinafter referred to as "DOS”) and di(2-ethylhexyl) azelate (hereinafter referred to as "DOZ”); hydrocarbons such as lipolube oil; and oligomers of ⁇ -olefins.
  • DOA di(2-ethylhexyl) adipate
  • DOS di (2-ethylhexyl) sebacate
  • DOZ di(2-ethylhexyl) azelate
  • hydrocarbons such as lipolube oil
  • viscosity-adjusting agents may be used singly or as admixtures of two or more kinds thereof.
  • the viscosity-adjusting agent is used in such amount that the resulting liquid ink paste has a viscosity of not less than 300 cP and less than 4,000 cP, preferably from 300 to 3,600 cP (the value as measured at 25° C, hereinafter the same).
  • the viscosity-adjusting agent is used in an amount of 20 to 50 % by weight on the basis of the total amount of the liquid ink paste.
  • the binder material used in the present invention is a resinous material which is incompatible with the components of the liquid ink paste and compatible with the volatile solvent mentioned below, and possesses an adhesiveness against the porous particles mentioned below.
  • the binder material are vinyl chloride-vinyl acetate copolymer, polyester resin, cellulose acetate butyrate, and the like. Those binder materials may be used singly or as admixtures of two or more kinds thereof.
  • the binder material is used preferably in an amount of 1 to 5 parts by weight, more especially 2 to 3 parts by weight, per 10 parts by weight of the liquid ink paste.
  • the minute porous particles used in the present invention are preferably those which have an average porosity of 50 to 97 %, more especially 60 to 93 % and an average particle size of 1 to 20 ⁇ .
  • the porous particles include inorganic porous powders such as diatomaceous earth, zeolite, porous silica powder and carbon black, and organic porous powders such as foamed polyurethane powder. Those porous powders may be used singly or as admixtures of two or more kinds thereof.
  • the porous powder is used preferably in an amount of 1 to 4 parts by weight, more especially 2 to 3 parts by weight, per 10 parts by weight of the liquid ink paste.
  • the volatile solvent there are used one or more solvents such as methyl ethyl ketone (hereinafter referred to as "MEK”), acetone, methyl isobutyl ketone, toluene, and isoparaffin hydrocarbon oils such as IP Solvent (commercial name of an isoparaffin made by IDEMITSU KOSAN CO., LTD.).
  • MEK methyl ethyl ketone
  • IP Solvent commercial name of an isoparaffin made by IDEMITSU KOSAN CO., LTD.
  • the preferred foundation used in the present invention is films having a thickness of 3 to 50 ⁇ , including polyester film, polypropylene film and polyamide film.
  • the specific vinyl chloride-vinyl acetate copolymer containing 4 to 7 parts by weight of viny chloride per 5 parts by weight of vinyl acetate is used as the binder material for bonding the porous particles to each other.
  • the reasons why such specific vinyl chloride-vinyl acetate copolymer is used are as follows: The preparation of a vinyl chloride-vinyl acetate copolymer having a vinyl chloride content of not more than 3 parts by weight per 5 parts by weight of vinyl acetate is very difficult.
  • the average degree of polymerization of the vinyl chloride-vinyl acetate copolymer is less than 700, the copolymer is poor in heat resistance so that the liquid ink paste flows out from the porous layer when the ambient temperature is more than 60° C.
  • a copolymer havig an average degree of polymerization of more than 950 is difficult in production.
  • the average degree of polymerization of the copolymer is from 700 to 950, particularly from 800 to 900.
  • the above-mentioned specific vinyl chloride-vinyl acetate copolymer is used as a binder material preferably in an amount of 1 to 5 parts by weight, particularly 2 to 3 parts by weight, per 10 parts by weight of the liquid ink paste.
  • the liquid ink paste used in the present invention is not particularly limited. However, the liquid ink paste claimed in the parent application of the present divisional application is preferably used, since the lowering of the optical density of the obtained image with increasing number of strikes against the same position of the recording media is gentle.
  • porous powder, foundation, the manner of preparing the ink-containing porous layer, and so on, which are used in present invention, may be the same as those in the parent application.
  • the pressure-sensitive transfer recording media shown in Table 1 were produced.
  • Run Nos. 1 to 4 shown in Table 1 are directed to the ink paste claimed in the parent application of the present application.
  • Each pressure-sensitive transfer recording media of Run Nos. 1 to 4 were produced as follows: An oil-soluble dye was mixed with a liquid fatty acid and the resulting mixture was heated to dissolve the dye into the liquid fatty acid. The obtained solution was mixed with the additional components of the liquid ink paste, i.e. pigment, wetting agent and viscosity-adjusting agent, and the components which constituted the porous layer, i.e. porous powder and binder material, and a volatile solvent.
  • the obtained dispersion was applied onto a polyester film having a thickness of 7 ⁇ by means of a coater and dried to give a pressure-sensitive transfer recording media having on one surface of the foundation an ink-containing porous layer in which a liquid ink paste composed of the dye solution, pigment, wetting agent and viscosity-adjusting agent was contained in a porous layer composed of the porous powder and binder material.
  • Run No. 5 shown in Table 1 is directed to a recording media as a comparison which had an ink-containing porous layer similar to that of the above-mentioned conventional pressure-sensitive transfer recording media.
  • the ink paste Nos. 1 to 4 fall within the scope of the parent application of the present invention and the ink paste Nos. 5 and 6 do not fall within the scope of the parent application of the invention.
  • the porous layer compositions shown in Table 4 the composition Nos. 1 to 12 fall within the scope of the Embodiment of the present invention and the composition Nos. 13 to 15 do not fall within the scope of the Embodiment of the present invention.
  • PCS X 100 means the value obtained by multiplying the PCS (VIS) value of the image obtained in the tenth strike, by 100
  • number of strikes means the number of strikes that a portion of the porous layer begins to be transferred.
  • any spots or stains resulting from the transfer of the porous layer per se were not produced when printing was repeated at the same position of the recording media not less than 30 times and the optical density of the image obtained in the 10th strike was high, i.e. ranging from 0.7 to a little under 0.8.

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  • Thermal Transfer Or Thermal Recording In General (AREA)

Claims (3)

  1. Mehrfach zu verwendendes druckempfindliches Übertragungs- und Aufzeichnungsmedium, welches umfaßt: einen Träger und eine feine, poröse auf dem Träger bereitgestellte Schicht, wobei genannte poröse Schicht sehr kleine poröse Partikel und ein Binder-Material, um die porösen Partikel aneinander zu binden, umfaßt, und welche eine flüssige Tintenpaste, die im wesentlichen inkompatibel mit dem Bindermaterial ist, enthält, wobei genanntes Bindermaterial ein Vinylchlorid-Vinylacetat-Copolymer umfassend 4 bis 7 Gewichtsteile des Vinylchlorids und 5 Gewichtsteile des Vinylacetats ist und einen durchschnittlichen Polymerisationsgrad von 700 bis 950 hat.
  2. Aufzeichnungsmedium nach Anspruch 1, worin die Menge des Bindermaterials und die Menge der porösen Partikel von 1 bis 5 Gewichtsteilen und von 1 bis 4 Gewichtsteilen ist, je für 10 Gewichtsteile der flüssigen Tintenpaste.
  3. Verwendung eines Vinylchlorid-Vinylacetat-Copolymers, das 4 bis 7 Gewichtsteile Vinylchlorid und 5 Gewichtsteile Vinylacetat umfaßt und einen durchschnittlichen Polymerisationsgrad von 700 bis 950 hat, als Bindermaterial für poröse Partikel in einem mehrfach zu verwendenden druckempfindlichen Übertragungs- und Aufzeichnungsmedium.
EP88116853A 1984-07-13 1985-07-10 Mehrfach zuverwendendes druckempfindliches Übertragungs- und Aufzeichnungsmedium Expired - Lifetime EP0310141B2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP59146524A JPS6124486A (ja) 1984-07-13 1984-07-13 多数回印字型感圧転写記録媒体
JP146524/84 1984-07-13
JP19537484A JPS6172584A (ja) 1984-09-18 1984-09-18 多数回印字型感圧転写記録媒体
JP195374/84 1984-09-18
EP19850108569 EP0168045B1 (de) 1984-07-13 1985-07-10 Mehrfach verwendbares druckempfindliches Übertragungs- und Aufzeichnungsmedium

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP85108569.6 Division 1985-07-10

Publications (3)

Publication Number Publication Date
EP0310141A1 EP0310141A1 (de) 1989-04-05
EP0310141B1 EP0310141B1 (de) 1992-11-19
EP0310141B2 true EP0310141B2 (de) 1996-04-17

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ID=27227774

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Application Number Title Priority Date Filing Date
EP88116853A Expired - Lifetime EP0310141B2 (de) 1984-07-13 1985-07-10 Mehrfach zuverwendendes druckempfindliches Übertragungs- und Aufzeichnungsmedium

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Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1218031A (en) * 1967-08-04 1971-01-06 Columbia Ribbon & Carbon Self-supporting transfer elements and processes for making self-supporting transfer elements
FR2508383B1 (fr) 1981-06-27 1987-04-17 Pelikan Ag Ruban-encreur pouvant etre surcharge en recouvrement
US4624881A (en) 1984-07-13 1986-11-25 Fuji Kagakushi Kogyo Co., Ltd. Multiple-use pressure-sensitive transfer recording media

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EP0310141A1 (de) 1989-04-05
EP0310141B1 (de) 1992-11-19

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