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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/52—Macromolecular coatings
• • 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
  • B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
  • B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
  • B41M5/508—Supports
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/31504—Composite [nonstructural laminate]
  • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
  • Y10T428/31565—Next to polyester [polyethylene terephthalate, etc.]

Definitions

• the invention relates to a recording sheet for overhead projection (OHP) or as a Blueing copy, which is suitable for the ink-jet recording process.
• OHP overhead projection
• Blueing copy which is suitable for the ink-jet recording process.
• a transparent polymer film for example a polyester film, has hitherto been used as the recording material for OHP, the recording image being obtained by writing with various inks, application of toner, application of a thermosensitive foam-forming recording material, etc.
• OHP film recordings obtained by the ink-jet recording process have the disadvantages that the drying time is too long due to the low ink absorption of the carrier material, or the image is transferred in the non-dry state and therefore the image runs on machine contact, is erased and contaminated.
• the object of the invention is to create a recording sheet for ink jet recorders, in which even multicolored recordings have neither bleeding nor bleeding and a superior image density and practically sufficient transparency.
• This object is achieved in that a solution is prepared in which a synthetic resin soluble in an organic solvent with a high water absorption capacity is dissolved in an organic solvent and applied to the transparent or semi-transparent support material.
• the synthetic resin according to the invention must be soluble in organic solvents and absorb water.
• An example of such a synthetic resin is that by reaction between a mono- or polyisocyanate compound and an ethylene oxide polymer or copolymer with an average molecular weight of at least 100,000 synthetic resin available in a weight ratio of 0.015 - 5 to 100 (hereinafter referred to as modified polyethylene oxide).
• Synthetic resins with good water absorption capacity are known. They are synthetic resins of the starch series (for example hydrolyzed acrylonitrile polymers, acrylic acid graft polymers) and synthetic resins from the series of synthetic resins (for example polymers of the polyvinyl series, polymers of the polyacrylic acid series, polymers of the polyethylene oxide series).
• synthetic resins of the starch series for example hydrolyzed acrylonitrile polymers, acrylic acid graft polymers
• synthetic resins from the series of synthetic resins for example polymers of the polyvinyl series, polymers of the polyacrylic acid series, polymers of the polyethylene oxide series.
• Such synthetic resins have a large water swelling capacity, but are not water-soluble and almost not soluble in organic solvents.
• Recording sheets for ink jet recorders in which fine particles of such water-absorbent synthetic resins having a particle size of 0.02-100 ⁇ m have been mixed and applied are described in JA-OSen 173194/1982 and 24492/1983.
• the synthetic resins of the invention are soluble in organic solvents, they are applied as a coating agent dissolved in the solvent, so that a coating with a superior transparency can be obtained.
• the synthetic resins according to the invention must have a high water absorption capacity, with regard to a satisfactory drying capacity of the ink and a satisfactory water resistance of the image, the synthetic resin according to the invention, when impregnated with ion exchange water at 25 ° C. for 30 minutes, has a water absorption capacity of 1-50 times, preferably 5- 25 times the weight of the synthetic resin.
• a resin with too high water absorption capacity causes the ink to dry too slowly and changes the dot, so that the image becomes unclear and illegible.
• the coating can often be separated from the carrier.
• the above synthetic resin according to the invention is dissolved in a suitable solvent, for example toluene, isopropyl alcohol, dichloroethylene, etc.
• the ink acceptor layer is formed by applying the dissolved synthetic resin in an amount of 2-15 g / m 2 on the carrier material.
• transparent backing material are: glass plates, synthetic resin films (polyethylene, polystyrene, polypropylene, vinyl chloride, vinylidene copolymer, polyvinyl copolymer film, etc.), cellophane, etc.
• semi-transparent backing material are: glassine paper, tracing paper, etc.
• a vinyl series synthetic resin for example polyvinyl butyral, polyvinyl acetate, polyethylene-vinyl acetate copolymers, etc.
• polyester resin for example, Vilonal 200, manufactured by Toyobo Co., Ltd.
• the polyvinyl resin or polyester resin is used in an amount of 5-50% by weight, preferably 20-40% by weight, based on the solvent-soluble synthetic resin with a suitable water absorption capacity, for example modified polyethylene oxide.
• the coating according to the invention which is formed by applying a solvent-soluble synthetic resin with a suitable water absorption capacity, leads to a uniform layer without fine particles, so that the transparency of the recording sheet is great, and the ink drops are quickly absorbed because of the suitable absorption capacity of the synthetic resin and the ink is fixed after proper spreading.
• a modified polyethylene oxide (AQUA-PRENE L-710, manufactured by Meisei Chemical Works Ltd., solid content: 15%) was dissolved in isopropyl alcohol (IPA) with stirring to obtain a 10% solution of the synthetic resin.
• the solution obtained was in a Coating amount of 7 g / m 2 was applied to a polyester film of 100 ⁇ m in thickness by a sieve bar to obtain a recording sheet.
• Powdered polyvinyl butyral (PVB; manufactured by Sekisui Chemical Co., Ltd., S-lec BL-3) was dissolved in isopropyl alcohol with slow stirring to obtain a 10% solution.
• the solution obtained was mixed with the solution of the modified polyethylene oxide from Example 1 in a ratio of 3: 7.
• the mixed solution obtained was applied to the transparent support in the same manner as in Example 1 to obtain a recording sheet.
• the following four coating compositions were produced: bridge product of polyacrylic acid (manufactured by SEITETSU Kagaku CO., LTD .: AQUA / KEEP 4S), acrylic acid-acrylamide copolymer (manufactured by Kyoritsu Yuki Kenkyusho, HIMOSAB 200), starch-acrylic acid copolymer ( manufactured by SANYO CHEMICAL INDUSTRIES, LTD., SANWET), starch-acrylonitrile graft copolymer (manufactured by NIPPON STARCH REFINING CO., LTD., WAS) were individually dispersed in IPA to make a 30% dispersion.
• polyacrylic acid manufactured by SEITETSU Kagaku CO., LTD .: AQUA / KEEP 4S
• acrylic acid-acrylamide copolymer manufactured by Kyoritsu Yuki Kenkyusho, HIMOSAB 200
• starch-acrylic acid copolymer manufactured by SANYO CHEMICAL INDUSTR
• the dispersions were ground into fine particles in a ball mill, thus obtaining dispersions of the various synthetic resin powders with a good water absorption capacity.
• the individual dispersions were mixed with the PVB solution of Example 2 in the ratio shown in Table 1, and the mixed solutions were in the manner given in Example 1 applied to the film to obtain a coated film.
• the powder of the bridge product of polyacrylic acid (AQUA KEEP) of Comparative Experiment 1 was mixed with an aqueous solution of polyvinyl alcohol (PVA 117 manufactured by KURARAY CO., LTD.) As a binder.
• the mixed solution was applied in the same manner as in Example 1 to obtain a coated film.
• the powder of urea formalin resin (Pargopak M, manufactured by CIBA-GEIGY Limited), which is known as a filler in an ink acceptor layer, was mixed with PVB or polyvinylpyrrolidone as a binder in the ratio shown in Table 1.
• the mixed solution was applied in the same manner as in Example 2 to obtain a coated film.
• a coated film was made in the same manner as in Example 2, but with the modified polyethylene oxide to PVB solution being 1 to 1.
• Coated films were made in the same manner as in Example 3, but with polyvinyl acetate (Vinylol 15 manufactured by Showa High Polymer Limited) or polyethylene-vinyl acetate copolymers (COARLEX 830 manufactured by The Nippon Synthetic Chemical Industry Co., Ltd.) were used instead of the PVB solution, respectively.
• polyvinyl acetate Vinylol 15 manufactured by Showa High Polymer Limited
• polyethylene-vinyl acetate copolymers COARLEX 830 manufactured by The Nippon Synthetic Chemical Industry Co., Ltd.

Landscapes

• Ink Jet Recording Methods And Recording Media Thereof (AREA)
• Paper (AREA)
• Duplication Or Marking (AREA)

Applications Claiming Priority (2)

Publications (3)

Family

ID=16350309

Family Applications (1)

Country Status (4)

Cited By (2)

Families Citing this family (19)

Family Cites Families (12)

• 1984
  • 1984-09-19 JP JP59195986A patent/JPS6174879A/ja active Granted
• 1985
  • 1985-09-17 DE DE8585111768T patent/DE3579279D1/de not_active Expired - Lifetime
  • 1985-09-17 EP EP85111768A patent/EP0175353B1/fr not_active Expired - Lifetime
  • 1985-09-18 US US06/777,238 patent/US4650714A/en not_active Expired - Lifetime

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