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WO2000060024A1 - Couches de finition pour une impression laser amelioree et procedes d'utilisation de ces couches de finition - Google Patents

Couches de finition pour une impression laser amelioree et procedes d'utilisation de ces couches de finition Download PDF

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Publication number
WO2000060024A1
WO2000060024A1 PCT/US2000/009335 US0009335W WO0060024A1 WO 2000060024 A1 WO2000060024 A1 WO 2000060024A1 US 0009335 W US0009335 W US 0009335W WO 0060024 A1 WO0060024 A1 WO 0060024A1
Authority
WO
WIPO (PCT)
Prior art keywords
topcoat
toner
substrate
functional additive
polyester
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.)
Ceased
Application number
PCT/US2000/009335
Other languages
English (en)
Inventor
Michael T. Waterman
Christopher D. Meader
Paul Lender
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.)
Avery Dennison Corp
Original Assignee
Avery Dennison Corp
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 Avery Dennison Corp filed Critical Avery Dennison Corp
Priority to AU43337/00A priority Critical patent/AU4333700A/en
Publication of WO2000060024A1 publication Critical patent/WO2000060024A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/002—Organic components thereof
    • G03G7/0026—Organic components thereof being macromolecular
    • G03G7/0046—Organic components thereof being macromolecular obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/002—Organic components thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
    • G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
    • G03G7/002—Organic components thereof
    • G03G7/0026—Organic components thereof being macromolecular
    • G03G7/004—Organic components thereof being macromolecular obtained by reactions only involving carbon-to-carbon unsaturated bonds

Definitions

  • This invention relates to topcoats for printing media. More specifically, the invention relates to topcoats which improve the anchorage and therefor the adhesion of a toner to a facestock with laser printing.
  • Laser printing and photocopy technologies use toner which is fused to the print media, such as paper, film, etc.
  • the laser heats the toner, melting and fusing it to the paper.
  • the image is written onto an electrostatically charged photo-conductor by a laser.
  • the photo-conductor loop carries the charged image to the developers where toner is deposited onto the image loop, and subsequently transferred to the base sheet.
  • the substrate plus toner is passed through a fuser roll to impregnate the image onto the sheet.
  • Printers can be distinguished based on the position of the fusing roll relative to the unfused toner. In 'back-side' fusion architecture, heat passes from the unprinted side of the sheet to the toner on the topside of the substrate; whereas, the fuser is placed directly over the toner in front fusing architectures.
  • the polymeric binder in toner being the major component, largely dictates the thermal properties and fusing efficiency of the toner.
  • the binder is typically polystyrene based, or a hybrid thereof.
  • color print technology in general, uses polyester based resins. While the fundamental technology and architecture of traditional monochrome (black/white/gray scale) and color laser printers show several commonalties, the specifics of fusing mechanisms and chemical compositions of the toners require substantially unique solutions and approaches toward the development of color toner receptive layers.
  • Toner thermal transitions The monochrome polystyrene based toner. in general, does not have a distinct melting transition. Fusion occurs over the entire viscoelastic zone. Whereby, color toner has well defined glassy and melting transitions to properly fuse to the substrate.
  • Surface energy, functionality, and polarity The monochrome topcoats tested were polystyrene-hybrids, which have significantly lower surface energies and polarities than the polyester resins in color toner.
  • This invention relates to toner receptive topcoats having improved fusion and anchorage of color toners.
  • the formulations comprise a polymeric binder and, optionally, at least one functional additive.
  • the invention relates to an aqueous topcoat composition comprising a major amount of a solvent and a minor amount of a polymeric binder in order to obtain a toner adhesion rating of greater than or equal to about 1 5 g, or greater than or equal to about 1 7, or greater than or equal to about 20 in the BYK-Gardner test.
  • the invention also relates to printable substrates having a topcoat which improves the adhesion of the toner. Methods of making the topcoated printable substrate is also included herein.
  • the topcoats provide increased toner anchorage, especially color toner anchorage.
  • the topcoat is particularly effective in providing improved toner anchorage to thick facestocks.
  • Fig. 1 is a schematic representation of the laser imaging process using front fusing.
  • Fig. 2 is a schematic representation of the laser imaging process using back fusing.
  • the topcoats are binders which improve the anchorage of the toner for laser printing.
  • the topcoats have a solvent, such as water and a binder, such as a polymeric binder.
  • the topcoats optionally include one or more functional additives. These functional additives are those affecting thermal and rheological properties.
  • the topcoats improve the toner anchorage on the printable substrate.
  • Fig. 1 represents a typical laser printer assembly 10, which has color toner components 1 1 which are "written” onto an electrostatically charged photo-conductor 1 2 by a laser 1 3.
  • the photo-conductor 1 2 carries the charged the toner where it is deposited to the base sheet 1 4.
  • the substrate plus toner is passed through at least one fuser roller 1 5 to impregnate the image onto the sheet.
  • Fig. 2A is a schematic of a backside fuser assembly, where toner components 1 1 on substrate 1 4 are passed by fuser roller 1 5 whereby the toner components are melted and adhered to the substrate.
  • Fig. 2B is a schematic of a front side fuser assembly, where toner components 1 1 on substrate 1 4 are passed by fuser roller 1 5 whereby the toner componets are melted and adherred to the substrate.
  • the topcoats are useful on printable substrate.
  • These substrates include polymeric film and paper substrates.
  • useful substrates include all paper substrates, including label stock, printer paper stock, card stock, and metallized paper, and film substrates, such as those used as the facestocks of labels and color transparencies.
  • the facestocks may be paper or polymer film facestocks known to those in the art.
  • the printable substrate may also be those used in multilayer laminates, such as label stock. These printable substrates may be any thickness, such as label stock, which may have a thickness of about 2 to about 4 mils.
  • the printable substrate is part of a laminated structure having a facestock which is printable, a pressure sensitive adhesive and a release liner on the pressure adhesive.
  • the thickness of the laminated structure may be the same thickness printable substrates discussed herein.
  • the topcoats are particularly useful on thick facestocks.
  • Thick facestocks are those having thicknesses of at least about
  • the facestocks typically have a thickness greater than 7, or greater than 7.3, or greater than 7.5 mils.
  • the topcoat is used on post card or business card stock.
  • the polymer film facestock may be any of those used in the art and include those which have multiple layers.
  • Table A contains examples of useful facestocks.
  • the printable substrates are coated with a coating composition which comprises a major amount of a solvent and a binder.
  • the solvent may be any of those know in the topcoating arts.
  • the solvents include water, alcohols (such as lower alcohols, those having up to about eight carbon atoms, including methanol, ethanol and the like), ketones (such as lower ketones, including acetone, methyl, ethyl ketone, and the like), aldehydes (such as lower aldehydes, including ethanal, butanal, and the like), n- vinylpyrrolidinone, etc.
  • the solvent is water and the compositions are aqueous compositions.
  • the solvent is present in an amount of at least about 50%, or at least about 60%, or at least about 65% or at least about 70% by weight.
  • the coating composition is placed on the printable substrate and forms a topcoat.
  • the topcoat of the facestock generally has a thickness of about 0.1 to about 0.8 mil, or about 0.3 to about 0.5 mil.
  • the topcoat may be applied directly to the facestock or may be connected to the facestock through an intermediate layer, such as a tie layer.
  • the topcoat is composed, in one aspect, solely of at least one binder.
  • the binders include those polymers which improve the anchorage of the toner, such as polyesters, sulfonated polyesters, polyvinyl acetates, polyvinyl pyrrolidinone, etc. Combinations of such binders may be used.
  • the binders are present in the coating composition at a minor amount. In one embodiment, the binder is present in an amount from about 3% to about 45%, or from about 5 % to about 40%, or from about 1 0% to about 35 %, or from 1 2% to about 30% by weight.
  • the range or ratio limits may be combined.
  • the polyesters are prepared by reacting at least one polycarboxylic acid or ester, such as a dicarboxylic acid or ester with at least one polyol, such as a diol.
  • the dicarboxylic acid may be aliphatic, alicyclic or aromatic.
  • acids include are: oxalic acid, malonic acid, dimethylmalonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, 2,2-dimethylglutaric acid, azelaic acid, sebacic acid, fumaric acid, maleic acid, itaconic acid, dodecanedioic acid, 1 ,3-cyclohexane dicarboxylic acid, 1 ,4-cyclohexane dicarboxylic acid, phthalic acid, isophthalic acid, , terephthalic acid, 2,5-norbornene dicarboxylic acid, diglycolic acid, thiodipropionic acid, 4,4'-sulphonyldibenzoic acid, 2,5-naphthalene dicarboxylic acid and 2,6-naphthalene dicarboxylic acid.
  • dicarboxylic acid monomers may be employed by themselves or as combination of at least two dicarboxylic acid monomers.
  • the diols include aliphatic, alicyclic and aromatic diols.
  • the diol component of the polyester includes cycloaliphatic diols having 6 to 20 carbon atoms or aliphatic diols having 3 to 20 carbon atoms.
  • diols examples include ethylene glycol; propylene glycol, 1 ,3-propanediol, 2- methyl- 1 ,3-propanediol, 2,4-dimethyl-2-ethyl-hexane-1 ,3-diol, 2,2-dimethyl- 1 ,3-propanediol(neopentylglycol),2-ethyl-2-butyl-1 ,3-propane diol(neopentylglycol),2-ethyl-2-butyl-1 ,3-propanediol, 2-ethyl-2-isobutyl- 1 ,3- propanediol, 1 ,3-butanediol, 1 ,4-butanediol, 1 , 5-pentanediol, 1 ,6-hexanediol, 2,2,4-trimethyl-1 ,6-hexanediol
  • the diols include diethylene glycol; neopentyl glycol, cyclohexanedimethanol, 2-ethyl-2-butyl-1 ,3-propanediol, 2, 2, 4-trimethyl- 1 ,3- pentanediol, hydroxypivalyl hydroxypivalate, and 2-methyl-1 ,3-propanediol.
  • the binder is a sulfonated polyester or sulfopolyester.
  • These polyesters are generally prepared by the partial polycondensation reaction of one or more of the above dicarboxylic acids or esters, one or more polyester and a sulfonate containing aromatic dicarboxylic acid.
  • the degree of sulfonation in the polyester is typically between 0.1 and 30 mol percent, and or between 0.2 mol percent and 1 5 mol percent of the repeating polymer units.
  • the molecular weights of the polyols are, for example, an Mw from about 400 to about 1 ,800, and Mn of from about 200 to about 1 ,400 and an Mw from about 700 to about 1 ,400 and an Mn from about 400 to about 1 , 100.
  • the aromatic nucleus of the difunctional aromatic monomer may additionally carry an ⁇ S0 3 M group.
  • the aromatic monomers include benzene, naphthalene, anthracene, diphenyl, oxydiphenyl, suiphonyldiphenyl and methylenediphenyl nuclei.
  • Examples of difunctional aromatic monomers additionally carrying an ⁇ SO 3 M group which may be mentioned are sulphoisophthalic acid, sulphoterephthalic acid, sulphophthalic acid and 4- sulphonaphthalene-2N-dicarboxylic acid.
  • the compositions that are the subject-matter of the invention employ copolymers based on isophthalate/suiphoisophthalate.
  • the invention employs copolymers obtained by condensation of diethylene glycol, cyclohexanedimethanol, isophthalic acid and sulphoisophthalic acid.
  • copolymers obtained by condensation of diethylene glycol, cyclohexanedimethanol, isophthalic acid and sulphoisophthalic acid.
  • Such polymers are sold, for example, under the trade name EASTMAN AQ by
  • the glycols employed are ethylene glycol and at least one branched chain glycol, preferably neopentyl glycol.
  • At least two dicarboxylic acids are utilized. They are independently chosen from the group consisting of sulfoarylene dicarboxylic acids such as 3-sulfophthalic acid, 4-sulfophthalic acid, 5-sulfophthalic acid, sulfoterephthalic acid, 4-sulfonapthalene-2,7- dicarboxylic acid, 5.(4-sulfophenyl) isophthalic acid, 5-(4-sulfoisophthalic sulfophenoxy)isophthaiic acid, 5-(2-sulfoethyl) isophthalic acid, and 5- sulfoisophthalic acid, with the latter preferred; alkyl or alkoxy substituted meta- or para-arylene dicarboxylic acids such as 5-methyl isophthalic acid.
  • the binder is a polyvinyl acetate.
  • the polyvinyl acetate is typically a homopolymer or copolymer of vinyl acetate and an olefin having from about 2 to about 8 carbon atoms, such as ethylene, propylene or butylene. Examples of these binders includes Vinac XX21 0, a polyvinyl acetate homopolymer.
  • the topcoat is prepared with functional additives.
  • Each functional additives may be present in an amount up to about 20%, or up to about about 1 5%, or up to about 8% by weight.
  • the lower limit for the fucntional additive is, in one embodiment, 0.1 %, or 0.2% by weight.
  • the functional additives are typically present in an amount from about 1 % to about 1 4% by weight.
  • the functional additives are mixed with the binder and applied to the facestock.
  • the functional additive may be at least one thermal regulator, defoamer, surfactant, plasticizer and dispersing aid.
  • Such functional additional additives include waxes which include micronized hydrocarbon wax of Micro Powders, Inc. and Jonwax 26, Jonwax 1 20 (available from S. C.
  • Vanwax 35 available from Vantage, Garfield, N.J. 07026); surfactants such polyethylene glycols such as Carbowax ® 400 and Surfynol 1 04 or Surfynol 440 (available from Air
  • Flexthane 620 aqueous polyurethane emulsion of Air Products; plasticizers, such as Paraplex G-54 (polyester plasticizer of C.P. Hall Corp.); biocides; pH stabilizers; thickeners such as Acrysol RM-825 (available from Rohm & Haas, Philadelphia, Penna. 1 91 05); and the like.
  • plasticizers such as Paraplex G-54 (polyester plasticizer of C.P. Hall Corp.); biocides; pH stabilizers; thickeners such as Acrysol RM-825 (available from Rohm & Haas, Philadelphia, Penna. 1 91 05); and the like.
  • topcoat formulations Unless otherwise indicated, the amounts and ratios are by weight. The temperature is in degrees Celsius, and the pressure is atmospheric. All weights and percentages are based upon dry weight measurements. The materials of Table 1 are used to prepare the topcoat formulations of Table 2.
  • topcoats formulations of Table 2 are prepared as follows:
  • Example #24 Deionized water (Table 2) is charged to a suitable stainless steel vessel. Component A (Table 2) is added in one aliquot and stirred for five minutes under mild agitation. Subsequently, Component B (Table 2) is added in one pass to Component A. The resulting mixture is agitated for an additional 1 5 minutes.
  • the above topcoats are applied to the facestock discussed below.
  • the toner anchorage is determined using the following equipment and test methods for the formulations of Table 2.
  • this consists of printing no less than three pages of standard copy paper prior to introduction of the test materials.
  • Examples #1 -25 show an increase in toner anchorage to the substrate.
  • the Lexmark SC-1 275 shows the most dramatic improvement owing to the top fusing mechanism.
  • the Hewlett Packard Color LaserJet 5 is a back-side fusing system and shows less, yet very significant, toner anchorage improvement as compared to the uncoated cardstocks listed in Table 3.
  • One formulation, Example 1 4, showed a dramatic strengthening in scrape resistance to the BYK-Gardner test. The data is summarized in Table 5.
  • Example 1 Substrates Coated with Example BYK-Gardner

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Developing Agents For Electrophotography (AREA)

Abstract

L'invention concerne des couches de finition réceptrices de toner présentant des propriétés améliorées de fusion et de fixation des toners de couleur. Les formulations comprennent un liant polymère et, éventuellement, au moins un additif fonctionnel. Dans un mode de réalisation, l'invention concerne une composition aqueuse contenant une quantité importante de solvant et une faible quantité de liant polymère de façon à obtenir un taux d'adhésion de toner supérieur ou égal à environ 15 g dans le test de BYK-Gardner. L'invention concerne également des substrats imprimables recouverts d'une couche de finition qui renforce l'adhésion des toners. L'invention concerne en outre des procédés de fabrication desdits substrats imprimables recouverts d'une couche de finition. La couche de finition renforce la fixation des toners, notamment la fixation des toners de couleur. Par ailleurs, la couche de finition est particulièrement efficace pour renforcer la fixation des toners sur des pellicules d'étiquetage épaisses.
PCT/US2000/009335 1999-04-07 2000-04-07 Couches de finition pour une impression laser amelioree et procedes d'utilisation de ces couches de finition Ceased WO2000060024A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU43337/00A AU4333700A (en) 1999-04-07 2000-04-07 Topcoats for improved laser printing and methods of using the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12813099P 1999-04-07 1999-04-07
US60/128,130 1999-04-07

Publications (1)

Publication Number Publication Date
WO2000060024A1 true WO2000060024A1 (fr) 2000-10-12

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Application Number Title Priority Date Filing Date
PCT/US2000/009335 Ceased WO2000060024A1 (fr) 1999-04-07 2000-04-07 Couches de finition pour une impression laser amelioree et procedes d'utilisation de ces couches de finition

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AU (1) AU4333700A (fr)
WO (1) WO2000060024A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8795818B2 (en) 2008-12-16 2014-08-05 Hewlett-Packard Development Company, L.P. Liquid toner digitally printable media
WO2019097469A2 (fr) 2017-11-17 2019-05-23 3M Innovative Properties Company Couches réceptrices d'encre pour étiquettes durables
WO2020003188A2 (fr) 2018-06-29 2020-01-02 3M Innovative Properties Company Couches de réception d'encre pour étiquettes durables

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181528A (en) * 1977-04-27 1980-01-01 E. I. Du Pont De Nemours And Company Subbing composition comprising treated gelatin-polyester-aziridine material for adhering photographic emulsion to polyester film base
US4977032A (en) * 1987-01-21 1990-12-11 Rhone-Poulenc Films Composite PVDC-coated polyester films
US5348832A (en) * 1993-06-01 1994-09-20 Xerox Corporation Toner compositions
US6015624A (en) * 1995-02-28 2000-01-18 3M Innovative Properties Company Ink-receptive sheet

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4181528A (en) * 1977-04-27 1980-01-01 E. I. Du Pont De Nemours And Company Subbing composition comprising treated gelatin-polyester-aziridine material for adhering photographic emulsion to polyester film base
US4977032A (en) * 1987-01-21 1990-12-11 Rhone-Poulenc Films Composite PVDC-coated polyester films
US5348832A (en) * 1993-06-01 1994-09-20 Xerox Corporation Toner compositions
US6015624A (en) * 1995-02-28 2000-01-18 3M Innovative Properties Company Ink-receptive sheet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8795818B2 (en) 2008-12-16 2014-08-05 Hewlett-Packard Development Company, L.P. Liquid toner digitally printable media
WO2019097469A2 (fr) 2017-11-17 2019-05-23 3M Innovative Properties Company Couches réceptrices d'encre pour étiquettes durables
US11905429B2 (en) 2017-11-17 2024-02-20 3M Innovative Properties Company Ink-receptive layers for durable labels
WO2020003188A2 (fr) 2018-06-29 2020-01-02 3M Innovative Properties Company Couches de réception d'encre pour étiquettes durables
US12331213B2 (en) 2018-06-29 2025-06-17 3M Innovative Properties Company Ink-receptive layers for durable labels

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