EP0275870B1 - A pressure sensitive reproducing material - Google Patents

A pressure sensitive reproducing material Download PDF

Info

Publication number
EP0275870B1
EP0275870B1 EP19880100058 EP88100058A EP0275870B1 EP 0275870 B1 EP0275870 B1 EP 0275870B1 EP 19880100058 EP19880100058 EP 19880100058 EP 88100058 A EP88100058 A EP 88100058A EP 0275870 B1 EP0275870 B1 EP 0275870B1
Authority
EP
European Patent Office
Prior art keywords
paper
thiocyanate
pressure sensitive
patterns
cobalt
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
Application number
EP19880100058
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0275870A1 (en
Inventor
Zenshiro Iijima
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.)
Adger Kogyo Co Ltd
Original Assignee
Adger Kogyo 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 Adger Kogyo Co Ltd filed Critical Adger Kogyo Co Ltd
Publication of EP0275870A1 publication Critical patent/EP0275870A1/en
Application granted granted Critical
Publication of EP0275870B1 publication Critical patent/EP0275870B1/en
Expired legal-status Critical Current

Links

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

Definitions

  • the present invention relates to a pressure sensitive reproducing material useful for providing reproduced letters or patterns which fade away with the application of water on it.
  • Pressure sensitive reproducing materials such as carbon paper in which pigments are applied on substrates of paper or plastic film are already known.
  • desired letters or patterns can be reproduced pressure-sensitively using a pressure applying tool such as ball-point pen, stylus or roulette on a sheet of paper, cloth or the like placed under the reproducing material.
  • a pressure applying tool such as ball-point pen, stylus or roulette on a sheet of paper, cloth or the like placed under the reproducing material.
  • the reproduced letters or patterns usually do not fade away, and it is rather difficult to erase them in the case they become unnecesary.
  • letters or patterns are drafted using conventional reproducing materials, and the drafted letters or patterns are to be erased at the end of works.
  • the erasing is usually carried out using a rubber eraser or the like, however, the operation is rather troublesome.
  • GB-A 2089827 discloses a transfer paper having thereon a transfer coating comprising cobalt thiocyanate, wax and surfactants.
  • cobalt thiocyanate crystal
  • a surfactant to prepare a non-aqueous solution
  • the solution is mixed thoroughly with a molten wax dissolving a non-ionic surfactant
  • the molten wax ink is coated on one or both surfaces of a base material (substrate)
  • the transfer coating is cooled and solidified and thus a transfer paper is obtained.
  • the transfer coating is a wax ink composed of a non-aqueous solution of cobalt thiocyanate in a surfactant dispersed in the solid wax. It is, therefore, necessary to remove the wax by washing the sheet bearing the transferred patterns with plenty of water in order to cause ionization of cobalt thiocyanate in the presence of water for erasing the color.
  • the reproducing material is prepared by dipping a substrate in a cobalt thiocyanate solution containing a solvent and a polyalkyleneglycol as a color development enhancer to obtain the clear color tint development of cobalt thiocyanate followed by drying the dipped substrate.
  • the transfer coating (colored material) of the present invention is a solution of cobalt thiocyanate in polyalkyleneglycol and remaining solvent containing no wax.
  • the polyalkyleneglycol is a hygroscopic materials originally transferred (reproduced) patterns of the transfer coating on a sheet can be erased by simply wiping with a wet paper, since the patterns of the transfer coating solution reacts directly with water.
  • a cloth bearing patterns of transfer coating can be washed with water, but a paper bearing patterns of transfer coating is difficult to be washed with water. Accordingly, the reproducing material (transfer paper) of the present invention can be applied to a paper (such as a case of lettering) as well as to a cloth; on the other hand, the transfer paper of GB-A 2089827 is suitable to be applied to a cloth but unsuitable to be applied to a paper.
  • cobalt thiocyanate is employed as the colored material in the present invention, its state of existence in transfer coating and in transferred patterns on a sheet material and the way of being erased by water differ substantially from those of the prior art.
  • FR-A-1506782 also refers to pressure-sensitive reproducing materials.
  • the example on page 3 of FR-A-1506782 also uses cobalt thiocyanate.
  • cobalt thiocyanate is dispersed in a polyvinyl alcohol solution.
  • the use of a polyalkyleneglycol is not disclosed or rendered obvious by this state of the prior art.
  • the object of the present invention is to provide a pressure sensitive reproducing material which allows reproduced letters or patterns to fade away with the application of water on it.
  • the present invention accomplished the object by a pressure sensitive reproducing material composed of a colored material supported on a substrate, in which the colored material contains cobalt-thiocyanate as a main ingredient, and a polyalkyleneglycol.
  • the present invention provides an improved pressure-sensitive reproducing material composed of a colored material supported on a substrate, in which the colored material contains cobalt-thiocyanate as a main ingredient.
  • the colored material can be applied on the substrate as a solution to give the pressure-sensitive reproducing material of the present invention.
  • Solvent of the colored material which can be used in the present invention includes water, organic solvent or a mixture of water and organic solvent.
  • the organic solvent includes, for example, methanol, ethanol, ether, aceton, chloroform, ethylacetate.
  • the preferable quantity of cobalt-thiocyanate to be added to the solvent is, although it would be varied depending upon the solvent used, generally speaking, 0.1 to 200 parts by weight, preferably 0.5 to 140 parts by weight per 100 parts of solvent.
  • polyalkyleneglycol is added to the colored material to obtain the clear color tint development of cobalt-thiocyanate.
  • Polyethyleneglycol, polypropyleneglycol or copolymer of ethyleneglycol and propyleneglycol can be used as polyalkyleneglycol for the purpose and their molecular weight are not limited specifically, but generally 100 to 6,000, preferably 200 to 3,000 are desirable.
  • the colored material which contains cobalt-thiocyanate as a main ingredient can also be prepared by adding nickel-thiocyanate, cobaltchloride and polyalkyleneglycol into a solvent.
  • each component to be added to the solvent is, although it would be varied depending upon the solvent used, generally speaking, 0.1 to 120 parts, preferably 0.5 to 50 parts by weight of nickel-thiocyanate, 0.1 to 100 parts, preferably 0.5 to 90 parts by weight of cobaltchloride, 2 to 30 parts, preferably 5 to 20 parts by weight of polyalkyleneglycol per 100 parts by weight of solvent.
  • a drying inhibitor or a hygroscopic agent such as glycerin, alkyleneglycol or polyalkyleneglycol per 100 parts by weight of solvent may be added to the colored material to improve the shelf life of the reproducing material, if necessary.
  • water-soluble macro-molecular substances as polyvinylalcohol, starch, sodium-alginate or carboxymethylcellulose may be added as a binder, if desired.
  • Pressure sensitive reproducing material of the present invention can be prepared by dipping a substrate such as paper (especially filter paper or blotting paper), cloth, hygroscopic rubber, hygroscopic plastic sheet or film into a solution of above-written colored material, then drying it.
  • a substrate such as paper (especially filter paper or blotting paper), cloth, hygroscopic rubber, hygroscopic plastic sheet or film.
  • Dipping conditions might be depending upon the kind of substrate. Generally speaking, if treated substrate was in the state of surface-dry and inside-wet, it is recommendable to pass it through compressed rolls to squeeze the surplus liquid out of it.
  • the reproducing material of the present invention can also be prepared by daubing or spraying the solution of the colored material on the substrate.
  • the solution of the colored material can be applied on one side or both side of the substrate.
  • This phenomenon is based on the principle that color of cobalt-thiocyanate disappeares by diluting with enough quantity of water.
  • the reproducing material of the present invention is especially suitable for drafting letters and patterns in the field of sewing, embroidery, lettering and the like.
  • a sheet of blotting paper was dipped into the solution, and the dipped paper was dried to produce a reproducing material.
  • a sheet of paper was dipped into the solution, and the dipped paper was dried to prepare a reproducing material.

Landscapes

  • Color Printing (AREA)
  • Coloring (AREA)
  • Paints Or Removers (AREA)
EP19880100058 1987-01-13 1988-01-05 A pressure sensitive reproducing material Expired EP0275870B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62004139A JPS63173683A (ja) 1987-01-13 1987-01-13 複写材料
JP4139/87 1987-01-13

Publications (2)

Publication Number Publication Date
EP0275870A1 EP0275870A1 (en) 1988-07-27
EP0275870B1 true EP0275870B1 (en) 1992-12-30

Family

ID=11576445

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880100058 Expired EP0275870B1 (en) 1987-01-13 1988-01-05 A pressure sensitive reproducing material

Country Status (3)

Country Link
EP (1) EP0275870B1 (cs)
JP (1) JPS63173683A (cs)
DE (1) DE3877003T2 (cs)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10514017B2 (en) 2017-03-21 2019-12-24 Pratt & Whitney Canada Corp. Internal combustion engine with igniter cooling sleeve

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE604646C (de) * 1934-10-25 Edouard Belin Ets Einrichtung fuer geheime Bilduebertragung, bei der die Bildzylinder mit wechselnder Geschwindigkeit angetrieben werden
DE252604C (cs) * 1911-11-18 1912-10-22
US2690953A (en) * 1950-12-28 1954-10-05 Deering Milliken Res Trust Fugitive tinting of nylon fibers
US3464823A (en) * 1965-12-28 1969-09-02 Ibm Diazotype materials
JPS524316A (en) * 1975-06-24 1977-01-13 Kuretake Kougiyou Kk Method of transfer* erasing and reemergence by chelate coloring
FR2418715A1 (fr) * 1978-03-01 1979-09-28 Cellophane Sa Liquides d'ecriture pour surfaces revetues d'un pigment organique
JPS54131428A (en) * 1978-04-03 1979-10-12 Adger Kogyo Co Ltd Ink
JPS56166091A (en) * 1980-05-27 1981-12-19 Arupaa Kk Transfer paper and manufacture thereof

Also Published As

Publication number Publication date
EP0275870A1 (en) 1988-07-27
DE3877003D1 (de) 1993-02-11
JPH0562078B2 (cs) 1993-09-07
JPS63173683A (ja) 1988-07-18
DE3877003T2 (de) 1993-04-15

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