JP2000198267A - Composition for image quality enhancement - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a chemical composition or the like which enhances the image quality when the composition is applied to a substrate before printing. SOLUTION: The method for treating a substrate for ink jet printing comprises applying a chemical composition for image quality enhancement to the substrate from a channel with a nozzle and discharging an aqueous ink, in a specified pattern, to the image receiving face of the treated substrate from an ink jet head so as to form an image which has a high optical density, a minimum extent of curling, long-lasting water resistance and light fastness.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

FIELD OF THE INVENTION The present invention relates generally to compositions, and more particularly to papers such as plain copy paper, recycled paper, coated paper, MYLAR®, TES.
Plastics, such as LIN®, and images such as paper used in particular for electrophotographic imaging, for inkjet printing processes, including acoustic inkjet processes, for gravure printing systems, and for thermal transfer printing processes. The present invention relates to a chemical composition for improving image quality which can be preferably applied in an on-line manner before being printed on a forming substrate, preferably by various marking techniques. The composition reduces, minimizes, or avoids curling of the substrate.

[0002]

As described in the prior patents, a paper desizing compound and a paper curl inhibitor are incorporated in an ink-jet ink, and a quaternary compound and a desizing compound are added to paper. Desizing) compounds and methods of incorporating decurling compounds may be appropriate for certain inks and certain papers, but are more efficient, for example, allowing high quality images even when printed by various printing processes. There remains a need for chemical compositions to improve image quality. In addition, a polymeric binder and a mordant, which can be applied to several different types of paper to reduce and eliminate paper curl, for example, to produce images having lightfastness, waterfastness and high optical density,
There is also a need for unique chemical compositions that include desizing / anti-curl compounds and water and light fast compounds. Also, for example, an image-formed treated paper coated with paper fibers with a composition that allows the paper with the developed image to have acceptable curl, high optical density values, and minimal see-through There are needs. For example, about 9
There is also a need for a processed paper on which an image is formed, which enables an image having excellent ink adhesion exceeding 5% and a long-term storage property and a scratch-resistant image having a high optical density. Also, plain copy paper on which images are formed, recycled paper, and filler-filled paper on which images are formed (imaged filled paper)
r) a liquid treatment to improve the image quality that is compatible with sized papers and coated papers, by applying several inkjet printing processes to the aforementioned materials, e.g. There is also a need for a liquid treatment for improving image quality such that an image with a high optical density can be generated.

It is an object of the present invention to provide a polymer binder, a desizing and decurling / curling / removing compound, which reduces, minimizes or eliminates paper curl, which is mainly caused by swelling of paper fibers. It is to provide a chemical composition containing:

It is a further object of the present invention to coat paper fibers with a composition that allows, for example, a paper having a developed image to have acceptable curl, high optical density values, and minimal see-through. There is also to provide a treated paper.

[0005] Another object of the present invention is to form an image capable of providing an image having excellent ink adhesion of, for example, about 95% and a long-term storage property, and a scratch-resistant image having a high optical density. There is also to provide processed paper.

[0006] Yet another object of the present invention is to provide a treated ink jet paper that minimizes or avoids color bleed.

[0007] Another object of the present invention relates to the application of certain chemical compositions to ink jet paper, for example, to enable paper having an ink jet image having acceptable curl and water and light fastness. .

[0008] Yet another object of the present invention is to provide a composition that is compatible with imaged plain copy paper, recycled paper, imaged filler loaded paper, sized perforated paper, and coated paper. It is in. The composition can be prepared using various inkjet printing processes.
Enables low curl and high optical density images.

Yet another object of the present invention is to provide an anti-curl chemical composition that is compatible with imaged plain copy paper, recycled paper, coated paper, filler-containing paper, and sizing-containing paper. . The composition enables high optical density images with little or no paper curl using an inkjet printing process. The paper coated with the chemical composition can be selected by an acoustic inkjet method, and the paper is pre-coated, for example, in an acoustic inkjet apparatus.

[0010]

SUMMARY OF THE INVENTION The present invention is directed to a hydrophilic solvent, a polymeric binder, a mordant, and a water-soluble, i.e., having a preferred solubility in the range of about 0.10 to about 30 g / 100 ml of water. Paper curl preventing compound,
The present invention relates to an ink composition including a water-soluble paper desizing compound, a light-fast compound, an antifoaming agent, a biocide, and a filler. The chemical composition comprises from about 0.1 to about 4 parts by weight, preferably from about 1 to about 2 parts by weight, or an amount that may be outside of this range, and from about 0.1 to about 50 parts by weight, preferably about 0.1 to about 50 parts by weight. About 5 to about 50 parts by weight of the mordant, which may be outside this range, and about 0.1 to about 20 parts by weight, preferably about 5 to about 15 parts by weight, or an amount of water-soluble A paper curl inhibiting compound, and from about 0.1 to about 5 parts by weight, preferably from about 1 to about 3 parts by weight, or an amount of water soluble paper desizing compound which may be outside of this range, and from about 0.1 to about 7 parts by weight; Parts by weight, preferably from about 2 to about 5 parts by weight, or an amount that may be outside of this range, and from about 0.1 to about 3 parts by weight.
Parts by weight, preferably from about 1 to about 3 parts by weight, or an amount that may be outside of this range, and from about 0.1 to about 3 parts by weight, preferably from about 1 to about 3 parts by weight, or out of this range. An amount of the biocide and about 0.1 to about 7 parts by weight, preferably about 1 to about 3 parts by weight, or an amount that may be outside this range, and about 99.2 to about 1 part by weight, Preferably about 83
To about 16 parts by weight, or an amount that may be outside of this range, such as water and methanol, ethanol, propanol,
And a hydrophilic solvent such as an aliphatic alcohol such as butanol, thereby improving the image quality. The total amount of all components in the composition is about 100 parts or 100%. The composition for improving image quality is, for example, about 0.5 to about 20.
It can be applied to an image-unformed paper with a thickness of μm.

[0011]

DETAILED DESCRIPTION OF THE INVENTION The chemical composition selected for the substrate coating comprises, for example, about 99.2 to about 1 part by weight of water, about 0.1 to about 4 parts by weight of a polymeric binder, 0.1 to about 50 parts by weight of mordant, and about 0.1 to about 20
Parts by weight of a water-soluble paper curl prevention / curl removal compound,
About 0.1 to about 5 parts by weight of a water-soluble paper desizing compound;
From about 0.1 to about 7 parts by weight of the lightfast compound, from about 0.1 to about 3 parts by weight of the antifoam, and optionally from about 0.1 to about 3 parts by weight.
Parts by weight of biocide and, optionally, from about 0.1 to about 7 parts by weight of filler can also be included.

The amount of the composition can be measured by a known method. More specifically, for example, it is as follows. Various blended binders, cationic mordants, anti-curl compounds, desizing compounds, light-fast compounds, defoamers, fillers, and biocides in a hydrophilic solvent such as water or ethanol. Prepared and coated on various substrates such as paper. 100
After drying the paper at ℃, test the coating adhesion to the paper,
Printing was performed using an Xerox Corporation ink jet tester to check, for example, image quality, image dry time, light and water fastness values, and intercolor bleed. The data was analyzed statistically for the optimal range of amounts.

In the chemical composition for improving image quality in the embodiment, the hydrophilic solvent is about 83 to 16 parts by weight, the polymer binder is about 1 to 3 parts by weight, and the mordant is
About 5 to about 50 parts by weight, the substantially water-soluble paper decurling compound is about 5 to 15 parts by weight, the substantially water-soluble paper desizing compound is about 1 to 3 parts by weight, and the light-fast material is ,
About 2 to about 5 parts by weight, about 1 to 3 parts by weight of antifoam, about 1 to 2 parts by weight of biocide, and about 1 to about 3 parts by weight of filler. (1) a polymer binder, (2) a mordant, a water-resistant compound, (3) a paper curl removing compound, (4) a paper desizing compound, (5) a light-resistant compound, and (6) an antifoaming agent And (7) a filler;
A preferable composition range of the chemical composition for improving image quality including (8) a biocide and (9) a hydrophilic solvent such as water is as follows.

[1 + 5 + 5 + 1 + 2 + 1 + 1 + 1 + 83]
= 100] to [3 + 50 + 15 + 3 + 5 + 3 + 3 + 2]
+ 16 = 100].

More specifically, the present invention provides a method for applying a chemical composition for improving image quality to a substrate on which an image is not formed, such as plain paper or recycled paper, preferably for various types of ink-jet including electro-acoustic ink-jet and electrophotography. Applying and coating before printing using marking technology. The present invention relates to a hydrophilic solvent such as water, a polymer binder, and a mordant also known as a water-resistant compound.
Water-soluble paper curl prevention or decurling compound, water-soluble paper desizing compound, light-fast compound, filler, defoamer, biocide, heat-shrinkable polymer binder,
And a chemical composition comprising: The composition can be applied to at least one surface of the substrate, more particularly, to two surfaces of the substrate, i.e., the imaged and non-imaged sides of the unimaged inkjet paper, and the substrate enters the inkjet marking head. Before heat drying. In this embodiment, the chemical composition comprises (1) a low viscosity polymeric binder having a viscosity of, for example, about 2 to about 20 cps, preferably about 5 to about 10 cps, such as a hydrocarbon wax or polyester latex, and (2) an Interpolymer.
Corporation HX-42-1, HX-
42-3, water-resistant mordants such as quaternary acrylic copolymer latexes, (3) hydrophilic pantothenol (Aldrich # 29,578-7),
Trimethylolpropane, trimethylolpropane ethoxylate, trimethylolpropane triacrylate, trimethylolpropane tris (2-methyl-1-
Paper curl preventing / curling removing compounds such as aziridine propionate) or neopentyl glycol ethoxylate, and (4) hydrophilic poly (dimethylsiloxane)
, Poly (alkylene glycol), derivatives thereof, such as poly (propylene glycol dimethacrylate), poly (ethylene glycol diacrylate), or poly (propylene oxide) -poly (ethylene oxide) copolymers; or quaternary Alcosulfate compounds; paper desizing compounds such as fatty imidazolines;
(5) Glycerol 4-aminobenzoate (Van
Escalol manufactured by Dyk Corporation
106), hexadecyl-3,5-di-tert-butyl-4-hydroxy-benzoate (Aldrich
Cyasorb manufactured by Chemical Company
Light-resistant compounds such as UV-absorbing compounds, including UV-2908, # 41, 320-8);
Behenyl alcohol (Aldol-60), stearyl alcohol (A) manufactured by Chemical Company
alcohol compounds such as ldol-61);
(7) 2-Hydroxypropyl methanethiosulfonate (Buckman Laboratories In
c. BUSAN 1005) or methylene bis (thiocyanate) (Calgon Corporation)
and (8) aluminum oxide trihydrate (JM Hub).
Hydra ™ from er Corporation
C-HBF, Hydrad TM-HBC) or barium sulfate (Kali Chemie Corporation)
Kion manufactured by K.ion. C. A mixture of fillers such as Blanc Fix HD80) and (9) hydrophilic solvents such as water, methanol and ethanol.

The present invention is directed to producing a high gloss, light and water fast color ink jet image having a high degree of scratch and abrasion resistance. For this purpose, a fifth developer housing containing the chemical composition for improving image quality described in the present application is used for an acoustic inkjet, a piezoelectric inkjet, or a thermal inkjet device which normally includes only four developer housings. It is prepared in a color image manufacturing apparatus such as the above. An additional fifth housing includes a composition described herein,
For example, hydrophilic solvents such as water, methanol, and ethanol, tetramethyldecinediol, and amorphous silica (Air Products Company Su)
rfynol-104S) and cationic poly (oxyethylene (dimethylamino) -ethylene (dimethylamino) ethylene dichloride) (Buckm
an Laboratories Inc. BUS
AN77), a transparent polymer material such as hydrocarbon wax, a water-resistant mordant such as quaternary acrylic copolymer latex, a paper curl preventing / curling removal compound such as hydrophilic pantothenol, (UV) absorption to minimize color image degradation due to paper desizing compounds such as conductive poly (dimethylsiloxane) s and UV rays such as hexadecyl-3,5-di-tert-butyl-4-hydroxy-benzoate A mixture of the material and a filler such as aluminum oxide trihydrate is included. A fifth or additional developer housing containing the chemical composition preferably occupies the first position in the development zone. Additional developer housings containing the chemical composition may occupy other locations in the development zone, such as the last location.

In that embodiment, the present invention comprises a solvent, preferably hydrophilic, a polymeric binder, a mordant, and a water-soluble or substantially water-soluble paper anti-curl compound having a solubility of, for example, about 75 to 95%. And a solubility of about 7
A composition comprising 5 to 95% of a water-soluble or substantially water-soluble paper desizing compound, a light-fast compound, an antifoam, an optional biocide, and optionally a filler. ;
The polymeric binder is present in about 1 to about 3 parts by weight, such as (1) polyamide latex, (2) polyalkylene waxes, (3) neoprene rubber latex, (4) polyester latex, (5) vinyl acrylic terpolymer latex (6) acrylic emulsion latex, (7) styrene-butadiene latex, (8) hydroxyethylcellulose, (9) vinyl methyl ether / maleic acid copolymer, and (10) cationic hydroxyethylcellulose, or other known suitable Selected from the group consisting of polymeric binders; the mordant is present in about 5 to about 50 parts by weight, (1) quaternary monoammonium salts, (2) quaternary phosphonium salts, (3) quaternary sulfonium salts, (4) quaternary thiazolium salts, (5)
The quaternary pyridinium salts, (6) quaternary benzothiazolium salts, and (7) polymeric acrylic quaternary latexes; Present in an amount of about 5 to about 15 parts by weight, (1) pantothenol, (2) trimethylolpropane ethoxylate, (3) neopentyl glycol ethoxylate, (4) glycerol propoxylate-b-glycerol ethoxylate triol. ,
(5) glycerol ethoxylate-b-glycerol propoxylate triol, (6) triethanolamine ethoxylate, (7) N-methyldiethanolamine, (8) 1,4-bis (2-hydroxyethoxy)
Selected from the group consisting of -2-butyne, (9) 3-piperidino-1,2-propanediol, and (10) 1,4-bis (2-hydroxyethyl) piperazine; From about 3 parts by weight of (1) hydrophilic poly (dialkylsiloxane) s, (2) poly (alkylene glycol), (3) poly (propylene oxide)
Poly (ethylene oxide) copolymers, (4) phosphate, sorbitan, glycerol, poly (ethylene glycol), sulfosuccinic acid, sulfonic acid, and fatty amine modified compounds of alkylamine, (5) sorbitan esters, fatty amine , Alkanolamides,
Selected from the group consisting of poly (oxyalkylene) -modified compounds of castor oil, fatty acids, and fatty alcohols, (6) quaternary alkosulfate compounds, and (7) fatty imidazolines; 2 to about 5 parts by weight, (1) glycerol 4-aminobenzoate,
(2) 4-allyloxy-2-hydroxybenzophenone, (3) 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, (4) (2,2,6,6-
Tetramethyl-4-piperidinyl) -1,2,3,4-
Butane-tetracarboxylate, (5) 2-dodecyl-N- (2,2,6,6-tetramethyl-4-piperidinyl) succinimide, (6) poly [N, N-bis (2,2, 6,6-tetramethyl-4-piperidinyl)
-1,6-hexanediamine-co-2,4-dichloro-
6-morpholino-1,3,5-triazine], (7) didodecyl-3,3′-thiodipropionate, (8)
1,6-hexamethylene-bis (3,5-di-tert
-Butyl-4-hydroxyhydrocinnamate),
(9) 2,2,4-trimethyl-1,2-hydroquinoline, (10) bis- (1,2,3,6-tetrahydrobenzaldehyde) pentaerythritol acetal,
(11) selected from the group consisting of paraffin wax, and mixtures thereof; the antifoaming agent is present in about 1 to about 3 parts by weight, (1) silica-filled polydimethylsiloxane, (2)
Erucyl erucamide, (3) polyethylene glycol-4-dilaurate, (4) polyethylene oxide / polypropylene oxide block copolymers, (5) tetramethyldecine diol, (6) polyethylene glycol-2-ole Selected from the group consisting of ammonium chloride, (7) octadecyldiethanolmethylammonium chloride, (8) tributyl phosphate, (9) sodium sulfonated oleate, and (10) alcohol-ethoxylate-phosphate-ester acid; The agent is present from about 1 to about 2 parts by weight, (1) 2-hydroxypropylmethanethiosulfonate, (2) 2- (thiocyanomethylthio) benzothiazole, (3) methylenebis (thiocyanate),
(4) 2-bromo-4'-hydroxyacetophenone,
(5) 3,5-dimethyltetrahydro-2H-1,3,3
5-thiadiazine-2-thione, (6) potassium N-hydroxymethyl-N-methyl-dithiocarbamate,
(7) methylene bis-thiocyanate (33 parts by weight),
Anionic blend of sodium dimethyl-dithiocarbamate (33 parts by weight) and sodium ethylenebisdithiocarbamate (33 parts by weight), (8) cationic poly (oxyethylene (dimethylamino) -ethylene (dimethylamino) ethylene dichloride), 9) a cationic blend of methylenebisthiocyanate and dodecylguanidine hydrochloride, and (10) a sulfone,
It relates to a composition selected from the group consisting of a cationic blend of bis (trichloromethyl) sulfone and quaternary ammonium chloride. The present invention also provides a substrate comprising a hydrophilic solvent, a polymer binder, a mordant, a water-soluble paper curl preventing compound, a water-soluble paper desizing compound,
A light-fast compound, an antifoam, and, if necessary, a biocide,
A process including applying a composition including a filler, if necessary; the application is performed from a channel including a nozzle, and thereafter, the aqueous ink is ejected from an inkjet head to an image receiving side of the substrate in a predetermined pattern. A process wherein the substrate is coated, the coated substrate is selected for ink jet printing, and the channel having the nozzle has an acoustic beam approximately opposite the nozzle opening, the beam applying the composition to the substrate. Process of generating a pressure pulse to eject about 0.1 to about 2 ml to the image receiving side; the channel with the nozzle has a heat generating resistor opposite the inkjet head nozzle opening, and the chemical composition is applied to the substrate. Pressure pulse for discharging about 0.5 to about 3 ml to the image receiving side of Are about 1.65 black, about 1.55 cyan, about 1.35 magenta, and about 1.35 yellow.
A high optical density of 25, a flat curl value within 5 mm ± 1.0 mm, a water resistance value of about 95% black, about 94% cyan, about 85% magenta, and about 82% yellow, and about 100% black and cyan A process having a lightfastness value of about 98%, about 96% magenta, and about 90% yellow; the channel with the nozzle has a piezoelectric transducer approximately opposite the ink jet head nozzle opening to transfer the composition to the image receiving side Process for generating a pressure pulse to deliver about 0.5 to about 5 ml to the nozzle; the channel having the nozzle includes a water pump attached to the nozzle, the pump being located opposite the inkjet head opening of the nozzle. And generating a pressure pulse to dispense about 0.5 to about 50 ml of the composition on each side of the substrate. A process of drying at about 80 to about 100 ° C. between a pair of pressure rolls under a pressure of 75 to about 125 psi; wherein the composition is an image enhancing composition, wherein the polymeric binder comprises about 1 to 3 parts by weight, the mordant is present in about 5 to about 50 parts by weight, the water-soluble paper curl preventing compound is present in about 5 to 15 parts by weight,
The water soluble paper desizing compound is present in about 1 to 3 parts by weight,
The lightfast compound is present at about 2 to about 5 parts by weight, the antifoam is present at about 1 to 3 parts by weight, the biocide is present at about 1 to 2 parts by weight, and the filler is present at about 1 to about 3 parts by weight. Wherein the hydrophilic solvent is water and is present in about 83 to 16 parts by weight, and the sum of all components of the composition is about 100 parts; the polymeric binder is optionally present in about 1 to about 3 parts by weight. (1) polyamide latex, (2) polyalkylene wax,
(3) neoprene rubber latex, (4) polyester latex, (5) vinyl acrylic terpolymer latex, (6) acrylic emulsion latex, (7)
A process selected from the group consisting of styrene-butadiene latex, (8) hydroxyethyl cellulose, (9) vinyl methyl ether / maleic acid copolymer, and (10) cationic hydroxyethyl cellulose; the polymer binder is neoprene rubber latex, or A process which is a polyester latex; the mordant is optionally present in about 5 to about 50 parts by weight, (1) quaternary monoammonium salts, (2) quaternary phosphonium salts, (3)
Group consisting of quaternary sulfonium salts, (4) quaternary thiazolium salts, (5) quaternary pyridinium salts, (6) quaternary benzothiazolium salts, and (7) polymeric acrylic quaternary latex. The mordant is an acrylic copolymer latex, or a myristyltrimethylammonium bromide of a quaternary monoammonium salt; the paper anti-curl compound is optionally present in about 5 to about 15 parts by weight. (1) pantothenol, (2) trimethylolpropane ethoxylate,
(3) neopentyl glycol ethoxylate, (4)
Glycerol propoxylate-b-glycerol ethoxylate triol, (5) glycerol ethoxylate-b-glycerol propoxylate triol,
(6) triethanolamine ethoxylate, (7) N
-Methyldiethanolamine, (8) 1,4-bis (2
-Hydroxyethoxy) -2-butyne, (9) 3-piperidino-1,2-propanediol, and (10) 1,
A process selected from the group consisting of 4-bis (2-hydroxyethyl) piperazine; a process wherein the paper curl inhibiting compound is pantothenol or 1,4-bis (2-hydroxyethoxy) -2-butyne; paper desizing The compound is present in about 1 to about 3 parts by weight, (1) hydrophilic poly (dialkylsiloxane) s, (2) poly (alkylene glycol), (3) poly (propylene oxide) -poly (ethylene oxide) copolymer , (4) Fatty ester modified compounds of phosphate, sorbitan, glycerol, poly (ethylene glycol), sulfosuccinic acid, sulfonic acid, and alkylamine; (5) Sorbitan esters, fatty amines, alkanolamides, castor oil (Oxyalkylene) -modified compounds of fatty acids, fatty acids and fatty alcohols (6) a process selected from the group consisting of quaternary alkosulfate compounds and (7) fatty imidazolines; the paper desizing compound is poly (propylene glycol) or poly (dimethylsiloxane) -b-poly ( A process which is a propylene oxide) -b-poly (ethylene oxide) copolymer; the lightfast compound is optionally present in about 2 to about 5 parts by weight;
Glycerol 4-aminobenzoate, (2) 4-allyloxy-2-hydroxybenzophenone, (3) 2-
(2′-hydroxy-5′-methylphenyl) benzotriazole, (4) (2,2,6,6-tetramethyl-
4-piperidinyl) -1,2,3,4-butane-tetracarboxylate, (5) 2-dodecyl-N- (2,
2,6,6-tetramethyl-4-piperidinyl) succinimide, (6) poly [N, N-bis (2,2,6,6
-Tetramethyl-4-piperidinyl) -1,6-hexanediamine-co-2,4-dichloro-6-morpholino-
1,3,5-triazine], (7) didodecyl-3,
3'-thiodipropionate, (8) 1,6-hexamethylene-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamate, (9) 2,2,4-trimethyl-1, 2-hydroquinoline, (10) bis-
A process selected from the group consisting of (1,2,3,6-tetrahydrobenzaldehyde) pentaerythritol acetal and (11) paraffin wax; the light-resistant compound is poly [N, N-bis (2,2,6,6- Tetramethyl-4-piperidinyl) -1,6-hexanediamine-
Co-2,4-dichloro-6-morpholino-1,3,5-
Triazine] or 2-dodecyl-N- (2,2,6,
6-tetramethyl-4-piperidinyl) succinimide; the antifoaming agent is optionally about 1 to about 3
Parts by weight, (1) silica-filled polydimethylsiloxane, (2) erucyl erucamide,
(3) polyethylene glycol-4-dilaurate,
(4) polyethylene oxide / polypropylene oxide block copolymers, (5) tetramethyldecinediol, (6) polyethylene glycol-2-oleammonium chloride, (7) octadecyldiethanolmethylammonium chloride, (8) tributyl phosphate, 9) sulfonated sodium oleate, and (10) alcohol-ethoxylate-phosphate-
A process selected from the group consisting of ester acids; a process wherein the defoamer is tetramethyldecine diol or polyethylene glycol-2-oleammonium chloride; a biocide optionally present from about 1 to about 2 parts by weight (1) 2-hydroxypropylmethanethiosulfonate, (2) 2- (thiocyanomethylthio) benzothiazole, (3) methylenebis (thiocyanate),
(4) 2-bromo-4'-hydroxyacetophenone,
(5) 3,5-dimethyltetrahydro-2H-1,3,3
5-thiadiazine-2-thione, (6) potassium N-hydroxymethyl-N-methyl-dithiocarbamate,
(7) methylene bis-thiocyanate (33 parts by weight),
Anionic blend of sodium dimethyl-dithiocarbamate (33 parts by weight) and sodium ethylenebisdithiocarbamate (33 parts by weight), (8) cationic poly (oxyethylene (dimethylamino) -ethylene (dimethylamino) ethylene dichloride), 9) a cationic blend of methylenebisthiocyanate and dodecylguanidine hydrochloride, and (10) a sulfone,
A process selected from the group consisting of bis (trichloromethyl) sulfone and a cation blend of quaternary ammonium chloride; the biocide is a cation blend of methylenebisthiocyanate and dodecylguanidine hydrochloride, or sulfone, bis (trichloromethyl) sulfone And a cation blend of quaternary ammonium chloride; the filler is optionally about 1 to about 3
Parts by weight of (1) colloidal silica, (2) titanium dioxide, (3) calcium carbonate, (4) a blend of calcium fluoride and silica, (5) zinc oxide, and (6) zinc sulfide and barium sulfate. A process selected from the group consisting of blends; a process wherein the filler is calcium carbonate or colloidal silica; a process wherein the hydrophilic solvent is water, methanol or ethanol, wherein the solvent is present from about 16 to about 83 parts by weight; About 25 parts by weight of water as a neutral solvent, 3 parts by weight of neoprene rubber latex or polyester latex as a heat shrink binder, and about 49 parts by weight of a quaternary acrylic copolymer latex or quaternary monoammonium salt as a mordant. Trimethylammonium bromide and about 15 parts by weight of a water-soluble paper Totenoru or 1,4-bis (2-
(Hydroxyethoxy) -2-butyne, and about 3 parts by weight of poly (propylene glycol) or poly (dimethylsiloxane) -b-poly (propylene oxide) -b-poly (ethylene oxide) as a water-soluble / dispersible paper desizing compound The copolymer and about 3 parts by weight of poly [N, N-bis (2,2,6,6-tetramethyl-4-
Piperidinyl) -1,6-hexanediamine-co-2,
4-dichloro-6-morpholino-1,3,5-triazine] or 2-dodecyl-N- (2,2,6,6-tetramethyl-4-piperidinyl) succinimide and about 1 as an antifoaming agent A cationic blend of about 1 part by weight of tetramethyldecinediol or polyethylene glycol-2-oleammonium chloride with about 1 part by weight of methylene bisthiocyanate and dodecylguanidine hydrochloride as a biocide, or sulfone, bis (trichloromethyl)
A chemical composition for improving image quality comprising a blend of a sulfone and a cationic blend of quaternary ammonium chloride and about 3 parts by weight of calcium carbonate or colloidal silica as a filler, the total of all the ingredients being about 100 parts by weight. An image produced using the composition had an optical density of 1.65 (black), 1.55 (cyan), and 1.
35 (magenta), 1.25 (yellow), flat curl value within 5 mm ± 1.0 mm, water resistance value of 95% (black), 94% (cyan), 85% (magenta), 8
2% (yellow), lightfastness 100% (black), 9
8% (cyan), 96% (magenta), 90% (yellow) process; the substrates were (1) polyethylene terephthalate, (2) polyethylene naphthalates,
(3) polycarbonates, (4) polysulfones,
(5) polyether sulfones, (6) poly (arylene sulfone) s, (7) cellulose triacetate, (8) polyvinyl chloride, (9) cellophane, (10) polyvinyl fluoride, (11) polypropylene, ( 12) polyimides,
(13) a process selected from the group consisting of paper;
A process that is polyethylene terephthalate, polypropylene, or paper; the image formed on the substrate is developed using an inkjet composition, but before development, the substrate is coated with a hydrophilic solvent, a polymeric binder, a mordant, Ink-jet process of applying a composition comprising a water-soluble paper curl preventing compound, a water-soluble paper desizing compound, a light-fast compound, an antifoaming agent, a biocide, and a filler; a composition for improving image quality Forming a coating on a substrate; a process wherein the substrate is paper; and a coating thickness of about 0.0001 to about 5 μm, wherein the substrate comprises a hydrophilic solvent, a polymeric binder, a mordant, Paper curl preventing compound, water-soluble paper desizing compound, light-fast compound, defoamer, biocide if necessary, and filler if necessary. It relates to a process with a coating comprising a.

In the image forming process of the ink jet system, the type of paper used, for example, whether it is coated paper, recycled paper, plain paper, or high gloss paper, is very important for obtaining a desired image quality. Become. Typical plain paper generally comprises a blend of hardwood, such as hardwood kraft, and softwood, such as softwood kraft fiber, wherein the blend comprises:
For example, about 10 to 90 parts by weight of softwood and about 90 to about 1
0 parts by weight of hardwood. An example of hardwood is Seagull
W Dry bleached hardwood kraft, preferably, for example,
In some cases, it is present at about 70 parts by weight. Examples of softwood are
La Tuque dry bleached softwood kraft, preferably present, for example, in some instances at about 30 parts by weight.
In the manufacture of paper, the wood fibers are dispersed in a dilute aqueous slurry and placed in a conventional fourdrinier in wet form as a mat or web. After dewatering the web, it is dried to a predetermined moisture content in the upstream section of the size press. These plain papers
Fillers and pigments are also included in effective amounts, for example, from about 1 to about 60 parts by weight. For example, Clay (Georgia Kaoli)
n Company Astro-fil 90 clay, Engelhard Ansilex clay), titanium dioxide (Tioxide Company An)
atase grade AHR), calcium silicate (J.
M. Huber Corporation CH-4
27-97-8, XP-974). Plain paper may also contain various effective amounts of sizing agents (eg, about 0.25 to about 25 parts by weight of pulp), eg, Mon size
(Monsanto Company), Herc
on-76 (manufactured by Hercules Company), Alum (iron-removed alum manufactured by Allied Chemicals), and Allied Coll
A retention aid such as Percol 292 from Oids is also included.

Using the present invention, a treated paper, ie, a treated substrate such as, for example, paper, is provided, wherein the image quality is enhanced by the chemical compositions described herein. The composition can be applied to at least one surface of the paper prior to printing. Since the polymer binder in the chemical composition is heat-shrinkable, curling during the heating and glossing steps can be reduced. Curl, for example,
Hold the center of one long side of the paper (for example, the center of one 11-inch (27.94 cm) side of 8.5 × 11 inches (21.59 × 27.94 cm) paper) with the thumb and the index finger, The arc formed by the paper is measured to a pre-drawn standard template curve showing a curl of, for example, about 5 to about 200 mm. The anti-curl compound in the chemical composition coats the fibers of the paper almost instantaneously, for example during rewetting of the paper. This makes the paper substantially unaffected by moisture imbalance from the back and from the front. The desizing compound or desizing agent in the chemical composition, for example, an alkylene oxide-b-dimethylsiloxane copolymer, a quaternary alkosulfate compound, etc., penetrates the paper and draws out the internal sizing agent from the fibers. Rearrange in paper. This compensates for changes in mechanical properties such as stiffness of the paper that occur in the rewet process. The mordant is
Interacts with the dye and fixes it on the paper surface. Lightfast compounds protect images from degradation by light, oxygen, and ozone. The defoamer prevents foaming during the application of the chemical composition to the paper. The biocide prevents mold and slime from forming during storage in tanks, thermal inkjet heads, or acoustic inkjet heads. The filler fills the holes in the paper and prevents the ink from penetrating deep into the paper.

The chemical composition can be applied to at least one surface of the paper from a tank using a spray nozzle. After application, the paper passes between two heating and pressing rolls. In embodiments, the chemical composition is applied to at least one surface of the inkjet paper before the paper enters the print engine using additional inkjet head assemblies including piezo electric inkjet heads, thermal inkjet heads, and acoustic inkjet heads. it can. The applied chemical composition is
(1) a polymer binder such as wax, polyester latex, or other similar compounds such as gelatin;
(2) Interpolymer Corporation
quaternary acrylic copolymer latexes such as HX-42-1, HX-42-3, and the like, US Pat. No. 5,320,
No. 902, a mordant such as a quaternary ammonium salt, and (3) hydrophilic pantothenol (Aldrich # 2).
9,578-7), trimethylolpropane (Aldr
ich # 23, 974-7), trimethylolpropane ethoxylate (Aldrich # 40, 977-4,
Aldrich # 40, 978-2, Aldrich #
41, 616-9, Aldrich # 41, 617-
7), trimethylolpropane triacrylate (Al
drich # 24, 680-8), trimethylolpropane trimethacrylate (Aldrich # 24, 68)
4-0), trimethylolpropane ethoxylate triacrylate (Aldrich # 41, 217-1, #
Paper curl preventing / curling removing compounds containing (41, 219-8), and (4) hydrophilic poly (dimethylsiloxane)
, Poly (alkylene glycol), derivatives thereof, poly (propylene oxide) -poly (ethylene oxide) copolymers; phosphates, sorbitan, glycerol, poly (ethylene glycol), sulfosuccinic acid, sulfonic acid, and fatty acids of alkylamine Ester-modified compounds; poly (oxyalkylene) -modified compounds of sorbitan esters, fatty amines, castor oil, fatty acids and fatty alcohols; paper desizing compounds containing quaternary alkosulfate compounds or fatty imidazolines; , (5) glycerol 4-aminobenzoate (Va
Escalol manufactured by nDyk Corporation
106), resorcinol monobenzoate (Eas
tman Chemicals RBM), octyldimethylaminobenzoate (Van Dyk Cor)
escalol 507) or hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate (Aldrich Chemical).
Cyasorb UV-29 manufactured by al Company
08, # 41, 320-8) and other light-resistant compounds such as UV-absorbing compounds, and (6) behenyl alcohol (Ald).
ol-60), stearyl alcohol (Aldol-6)
1), isostearyl alcohol (Aldol-6)
6), oleyl alcohol (Aldol-85), cetearyl alcohol (Aldol-64)
0) (All of these are Sherex Chemical
Company), dimethyloctynediol (S
rifynol-82), dimethyloctynediol on silica (Sur)
fynol-82S), tetramethyldecinediol (Surfinol-104), tetramethyldecinediol and 2-ethylhexanol (Surfinol-
104A), tetramethyldecinediol and 2-butoxyethanol (Surfynol-104BC), tetramethyldecinediol and 2-ethylene glycol (S
surfynol-104E), tetramethyldecinediol and amorphous silica (Surfinol-104E).
S), ethoxylated tetramethyldecinediol (Su
rfynol-440), acetylene glycol (Su
rfynol-PC), acetylene diol (Surf)
ynol-SE) (both are Air Produc)
(7) 2-hydroxypropyl methane thiosulfonate (Buckman Laborato)
ries Inc. BUSAN 1005), 2-
(Thiocyanomethylthio) benzothiazole (Buck
man Laboratories Inc. Company BU
A biocide such as SAN30WB, 72WB) or methylenebis (thiocyanate) (Metasol T-10 from Calgon Corporation);
(8) Aluminum oxide trihydrate (JM Huber)
Corporation Hydrad TMC-
HBF, Hydrad ™ -HBC), barium sulfate (KC Blank Fix HD80 manufactured by Kali Chemie Corporation), calcium carbonate (Microwhite Syracuga)
Calcium Products), high brightness clays (such as those manufactured by Engelhard Paper Clays), calcium silicate (JM Huber Cor)
and (9) water,
And mixtures or blends with hydrophilic solvents such as methanol and ethanol.

Examples of substrates to be coated are paper, MYLAR
(Product name) (EI Du Pont de Nemo)
urs & Company, polyethylene terephthalate), MELINEX (trade name) (Imperia
l Chemicals, Inc. Polyethylene terephthalate), CELANAR (trade name) (Cela
Polyesters such as polyethylene terephthalate manufactured by Nise Corporation and polyethylene naphthalates (Imperial Chemical)
Industries, Inc., Kaladex PEN films, etc.), polycarbonates (General
LEXAN (trade name) manufactured by Electric Company). The substrate was opaque MYLARS (trade name), a polyethylene terephthalate filled with barium sulfate and titanium dioxide, PPG Industrial.
It may be opaque, such as TESLIN (trade name), a filled polypropylene having microvoids manufactured by es.
Filled plastics can also be used as a substrate, especially if it is desired to produce a tear-free recording paper.

Illustrative examples of commercially available internal and external (top) papers having a thickness of, for example, about 50 to about 200 μm, preferably about 100 to about 125 μm, which are treated with a chemical composition to enhance image quality are: , Diazo papers, Great
Lakes Offset Paper, Conser
Recycled papers such as vatree, Automime
o such as office paper, Eddy liquid toner paper, and
Nekoosa, Champion, Wiggins
Teape, Kymmene, Modo, Domta
r, Veitsiluoto, and other copy papers of various companies.

Polymer binders present, for example, from about 0.1 to about 4 parts by weight, preferably from about 1 to about 3 parts by weight, of the chemical composition for improving image quality, in which the decurling compound can be dispersed or mixed. Examples of latex polymers include latex polymers (polymers capable of forming a latex are polymers in which the dispersed phase forms a stable colloidal system of polymers in water or organic solvents), and US Pat. No. 5,624,743. And the like.

Preferred polymeric binders present, for example, from about 0.1 to about 4 parts by weight, preferably from about 1 to about 3 parts by weight of the chemical composition for improving image quality include (1) Pion
polyamide latex such as PIOMIDE manufactured by eerPlastics, (2) Hercules Inco
polyalkylene waxes such as paraffin wax emulsion Paracol 404C, 404G, 804A manufactured by Rporated, (3) Serva Bi
rubber latex such as neoprene manufactured by Chemicals, and (4) Eastman Chemical Co.
polyester latex such as Eastman AQ 29D manufactured by mpany Inc., (5) Union Oil C
76 RES manufactured by chemical Division
Vinyl acrylic terpolymer latex such as 3103, (6) Rhoplex B-15J, Rhople
x Acrylic emulsion latex such as P-376, (7) Union Oil Chemicals
Division 76 RES 4100 and 76
Styrene-butadiene latexes such as RES 8100, (8) hydroxyethyl cellulose (Natr
osol 250LR, Hercules Chemi
cal Company), (9) vinyl methyl ether / maleic acid copolymer (Gantrez S-9)
5, GAF Corporation) and (1
0) Cationic hydroxyethyl cellulose (Poly
mer JR-125, polyquaternium
-10, manufactured by Amerchol; Cationic Cell
size, manufactured by Union Carbide).

Suitable cationic mordant compounds include diaminoalkanes, quaternary salts, quaternary acrylic copolymer latexes, such as Interpolymer Corp.
HX-42-1, HX-42 manufactured by PORATION
3, quaternary ammonium salts, quaternary phosphonium salts disclosed in US Pat. No. 5,320,902, and quaternary sulfonium salts disclosed in US Pat. No. 5,314,747; Quaternary thiazolium salts and quaternary benzothiazolium salts. Three preferred quaternary dye compounds are (1) quaternary acrylic copolymers (Interpolymer Corporation).
HX-42-3), (2) myristyltrimethylammonium bromide of monoammonium salt (Aldric)
h # 86,042-5) and (3) diamyl ammonium salt of didecyldimethylammonium bromide (Aldri
ch # 38, 231-0).

Specific examples of the anti-curl / curl-removing compound selected for one-sided or two-sided paper treatment or coating with a chemical composition for improving image quality include pantothenol (Aldrich # 29,578-7), trimethylolpropane Ethoxylate, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, trimethylolpropane ethoxylate triacrylate, trimethylolpropanepropoxylate triacrylate, trimethylolpropane ethoxylate methyl ether diacrylate, trimethylolpropane tris (2-methyl- 1-aziridine propionate), neopentyl glycol ethoxylate, neopentyl glycol propoxylate, glycerol propoxylate (A ldrich # 37,390-
7, Aldrich # 37, 392-3), block copolymers of glycerol propoxylate and glycerol ethoxylate expressed as glycerol propoxylate-b-glycerol ethoxylate,
For example, glycerol propoxylate-b-glycerol ethoxylate triol, glycerol ethoxylate-b-glycerol propoxylate triol (Aldrich # 40,918-9), pentaerythritol ethoxylate, pentaerythritol propoxylate, pentaerythritol propoxylate / ethoxylate, Triethanolamine ethoxylate, N-methyldiethanolamine, N-ethyldiethanolamine, N-butyldiethanolamine (Ald
rich # 12, 425-7), N-phenyldiethanolamine, and mixtures thereof.

Preferred water-soluble paper curl preventing compounds are (1) pantothenol, (2) trimethylolpropane ethoxylate (Aldrich # 40,977).
-4), (3) neopentyl glycol ethoxylate, (4) glycerol propoxylate-b-glycerol ethoxylate triol, (5) glycerol ethoxylate-b-glycerol propoxylate triol, (6) triethanolamine ethoxylate, (7) N-methyldiethanolamine, (8) 1,
4-bis (2-hydroxyethoxy) -2-butyne,
(9) 3-piperidino-1,2-propanediol,
(10) 1,4-bis (2-hydroxyethyl) piperazine and a mixture thereof.

Water-soluble desizing compounds selected for one-sided or two-sided treatment or coating of paper with a chemical composition for improving image quality are disclosed in US Pat. Nos. 5,211,747 and 5,302,249. Paper desizing compounds, etc. Preferred desizing compounds are (1) poly (dimethylsiloxane) carbinol terminated (PS55
5, PS556, PS558, Petrarch Sy
stems Inc. (2) Poly (dimethylsiloxane) -b-poly (methylsiloxane alkylene oxide) copolymers (PS073, PS072, PS0)
71, Petrarch Systems Inc. Co., Ltd.), Alkasil HEP 182-280, Al
kasil HEP 148-330 (Alkaril
Chemicals), unhydrolyzed copolymers containing Si-C bonds, (3) poly (dimethylsiloxane) -b-poly (propylene oxide) -b-poly (ethylene oxide) copolymers (Alkasil)
NEP 73-70, Alkaril Chemical
ls), a hydrolyzable copolymer containing a Si-OC bond, and (4) polyquaternary poly (dimethylsiloxane) copolymers (α, ω-hydrogenpolysiloxane having an olefin bond). An addition reaction with epoxides and the resulting product is reacted with a diamine), (5) poly (propylene glycol) (Alkapol PPG-
425, Alkapol PPG-4000, Alka
(Ril Chemicals), (6) Fatty ester modification of phosphates (Alkaphos B6-5)
6A, manufactured by Alkaril Chemicals),
(7) Sorbitan esters (Alkamuls PS
ML-4 [poly (oxyethylene) sorbitan monolaurate], Alkamuls PSMO-20 [poly (oxyethylene) sorbitan monooleate], Al
kamuls PSTO-20 [poly (oxyethylene) sorbitan trioleate], Alkaril C
chemicals), (8) Nonylphenol ethoxylates (Alkasurf NP-1, NP-1)
1), (9) Non-polymer quaternary ammonium ethosulfate (Finquat CT, Cordex AT-1)
72, Finetex Corporation), (10) Fat imidazolines and their derivatives, for example, Alkazine-O [olein derivative]
And so on.

Some of the paper curl prevention / curl removal compounds and paper desizing compounds can also act as defoamers for chemical compositions to improve image quality.

Further, the chemical composition for improving the image quality is as follows:
For example, from about 0.1 to about 7 parts by weight, preferably from about 2 to about 5 parts by weight, of a lightfast compound as described in U.S. Patent Nos. 5,612,777 and 5,624,743. including.

Preferred light-fast compounds are (1) glycerol 4-aminobenzoate (Escalol 10)
6, Van Dyk Corporation)
(2) 4-allyloxy-2-hydroxybenzophenone (Uvinul 600, # 41,583-9, Al
drich Chemicals), (3) 2-
(2′-Hydroxy-5′-methylphenyl) benzotriazole (Tinuvin 900, Ciba Ge
igy Corporation), (4) (2,
2,6,6-tetramethyl-4-piperidinyl) -1,
2,3,4-butane-tetracarboxylate (Mix
xim HALS 57, Fairmount Cor
(5) 2-dodecyl-N-
(2,2,6,6-tetramethyl-4-piperidinyl)
Succinimide (Cyasorb UV-3581, #
41,317-8, Aldrich Chemical
(6) Poly [N, N-bis (2,2,6,6-tetramethyl-4-piperidinyl)]
-1,6-hexanediamine-co-2,4-dichloro-
6-morpholino-1,3,5-triazine] (Cyas
orb UV-3346, # 41, 324-0, Ald
rich Chemical Company).

It is selected for one-sided or two-sided treatment or coating of paper with a chemical composition for improving the image quality, and is used for about 0.
Specific examples of antifoaming agents present from 1 to about 3 parts by weight, preferably from about 1 to about 3 parts by weight, include (A) nonionic compounds, such as (a) silicon-containing compounds, such as polydimethylsiloxane (Akrochem). SWS-201, A
crochem Chemicals), silica-filled polydimethylsiloxane (Sag Silicone)
Antifoam-100, Union Carbi
de Chemical Company), silicon / polyalkylene glycol (Sag Silic)
one Antifoam-100, Union Ca
rbid Chemical Company), silicon glycol (Masil-2132,-
2133, -2134, manufactured by PPG-Mazer)
(B) Amide-containing compounds, for example, erucyl erucamide (Kenamide-E-221), erucyl stearamide (Kenamide-S-221), ethylene diolamide (Kenamide-W-20), ethylene distearamide ( Kenamide-W-39) (all are manufactured by Witco / Humko), acetylation-
Polyamide (Nalco-70, Nalco Chem
ical Company).

The preferred defoamer compound is present from about 1 to about 3 parts by weight and comprises: (1) silica-filled polydimethylsiloxane (Sag Silicone Antifoam-10);
0, Union Carbide Chemical
Company), (2) Elcil Ercamide (K
Enamide-E-221), (3) Polyethylene glycol-4-dilaurate (Alkamuls 20)
0-DL, manufactured by Alkaril Chemicals), (4) Polyethylene oxide / polypropylene oxide block copolymers (Dow Corning)
63N10), (5) Tetramethyldecinediol and amorphous silica (Surfynol-104S, Ai
r Products Company), (6)
Polyethylene glycol-2-oleammonium chloride (Ethoquad O / 12), (7) octadecyldiethanolmethylammonium chloride (M-Qu
at-32, Akzo Chemical Compa
ny), (8) tributyl phosphate (TBP,
Pliabra, manufactured by FMC Corporation
c-TBP, manufactured by Merland), (9) Sulfonated sodium oleate (Sulfonate OA-
5, Tennesse), (10) alcohol-ethoxylate-phosphate-ester acid form (Emph
os P-415M).

Further, the chemical composition for improving the image quality is as follows:
For example, it contains one or more biocides described in US Pat. No. 5,663,004. Examples of suitable preferred biocides are
(A) Nonionic biocides, for example, (1) 2-hydroxypropylmethanethiosulfonate (BUSAN 1
005, Buckman Laboratories I
nc. (2) 2- (thiocyanomethylthio) benzothiazole (BUSAN 30WB, 72WB, B
uckman Laboratories Inc. (3) methylene bis (thiocyanate) (Met
asol T-10, Calgon Corporation
(4) 2-bromo-4'-hydroxyacetophenone (BUSAN 90, Buckman L)
laboratories Inc. (5) 3,
5-dimethyltetrahydro-2H-1,3,5-thiadiazine-2-thione (SLIME-TROL RX-2
8, Betz Paper Chem), and mixtures thereof. The biocide can be present in any suitable amount, but generally will be from about 0.001 to about 5 parts by weight of the coating composition. It may be outside this range.

Further, the chemical composition for improving the image quality is as follows:
A filler such as colloidal silica; a pigment such as a blend of zinc sulfide and barium sulfate; And a mixture of pigments to impart a light color to the paper before printing, for example, a color having an optical density on paper of about 0.1 to about 0.5. Specific examples of the filler include (1) colloidal silica (for example, Syloid 7).
4, Grace Company) (in one embodiment preferably present from about 0.5 to about 5 parts by weight);
(2) Titanium dioxide (Rutile or Anatas)
e, NL Chem Canada Inc. Company),
And (3) Calcium carbonate (Microwhite S)
ylacauga) and the like. Specific examples of pigments include
(1) A blend of calcium fluoride and silica (eg, O
palex-C, manufactured by Kemira OY), (2) zinc oxide (for example, Zoco Fax 183, Zo Ch)
em), (3) a blend of zinc sulfide and barium sulfate (eg, Lithopane, Schteben Co.)
mpany), (4) brightener pigments such as those derived from coumarin, stilbene and oxazole derivatives, and mixtures thereof. Brightener pigments improve color mixing and improve strikethrough in the imaging substrate of the present invention. These additives are present in suitable effective amounts, but are usually present in about 0.1 to about 7 parts by weight of the coating composition.

The Hercules sizing values quoted in this application are based on the Technical Association of the Pulp and Paper Industry (Technica).
l Association of the Pulp
TA issued by And Paper Industry)
Hercules sizing tester described in PPI STANDARDT-530 pm-83 (He
rcules Incorporated). This method is closely related to the commonly used ink flotation test. T
The APPI method is superior to the ink flotation test because the endpoint can be detected photometrically. T
The APPI method uses a weakly acidic aqueous dye solution as a penetrating compound, and optically detects the front of a liquid moving in paper. The apparatus measures the time required for the reflectance of the paper surface not in contact with the penetrant to drop to a predetermined percentage (80%) of the original reflectance.

The porosity value referred to in the present application is a value obtained by using a porosity meter Parke which records the amount of air flowing per minute through the paper.
It was measured by r Print-Surf.

The imaged substrate in an embodiment of the present invention exhibits reduced hanging curl within about 5 mm ± 1.0 mm. The value of the hanging curve of the substrate was excellent, about 40 mm ± 5.0 mm. Typically,
The term "hanging curl" refers to the width (or short side of the substrate, e.g., 8.5 x 11 inches (21.59 x 27.9).
8.5 inch (21.59 cm) side of 4 cm) paper. On the other hand, 8.5 × 11 inches (21.59 × 2
11 inches (27.94 cm) of 7.94 cm) paper
Is the length, or the long side. ) Refers to the distance between the base line of the arc formed by the substrate on which the image is formed and the midpoint of the arc when viewed in the cross-section in the direction). To measure the curl, use your thumb and forefinger to center one long side of the paper (the center of the 11 inch (27.94 cm) side of 8.5 × 11 inch (21.59 × 27.94 cm) paper). And match the arc formed by the paper with the standard template curve that was previously drawn. In general, the term "flat curl" refers to the average height of the four corners of a printed sheet when placed on a flat surface with the non-image side of the printed sheet down.

The optical density cited in the present application is
c Spectrograph Color System
measured in em. The system consists of two major components: an optical sensor and a data terminal. The optical sensor uses a 6-inch (15.24 cm) integrating sphere to provide diffuse light illumination and a 2 degree field of view. With this optical sensor, both transmittance and reflectance samples can be measured. If a reflectance sample is measured, a specular compound is included. 380 to 72 using a high resolution full dispersion grating monochromator
The 0 nm spectrum was scanned. The data terminal includes a 12-inch (30.48 cm) CRT display, a numeric keyboard for operating variable selection and tristimulus value input, and an alphanumeric keyboard for product standard information input. The print-through value determined by the printing industry is Log ₁₀ (reflectance of one unprinted paper against a black background / reflectance of the back side of a black printed area against a black background) measured at a wavelength of 560 nm.

The bleed between colors in μm was measured on a black and yellow checkerboard inkjet pattern using a calibration microscope.

[0041]

EXAMPLES Comparative Example I. The pattern of the checker board is converted to untreated, uncoated Courtland paper (Champion
Hercules, manufactured by Paper Company
The ink was printed using an acoustic inkjet test printer at a size of 250 seconds and a porosity of 840 mil / min. The printer includes one or more acoustic radiators for illuminating a free surface of the liquid reservoir with a respective acoustic beam. Typically, each of these beams is focused at or near the surface of the reservoir (i.e., at the liquid / air interface). Furthermore, conventional printing is achieved by independently modulating the excitation of the acoustic radiator according to the input data samples of the image to be printed. This modulation allows the radiation pressure exerted by each beam on the free ink surface to be briefly controlled in excess of a high pressure level sufficient to overcome surface tension constraints.
As a result, individual ink droplets ejected from the free ink surface are generated with an appropriate viscosity on demand. Inks of the following composition were used in the acoustic inkjet test printer described above.

Black: 18.0 g of ethylene glycol (Caledon Laboratories Ltd.)
d. Co., Ltd.) and 0.25 g of butyl carbitol (Al
(Drich Chemical Company)
And 0.05 g of proxel GXL biocide (Ze
neca, Inc. 50.2 g of water and 1
0.5 g of Basacid X-34 process black dye (BASF Wyandotte Corpora)
) and 21 g of ProJet Fast Black 2 (Zeneca, Inc.) were mixed and stirred for 2 hours. Next, this ink was used with a pore size of 0.45.
The solution was filtered through a cellulose acetate filter containing no μm surfactant.

Cyan: 20.0 g of ethylene glycol (Caledon Laboratories Ltd.)
d. Co., Ltd.) and 0.25 g of butyl carbitol (Al
(Drich Chemical Company)
And 0.05 g of proxel GXL biocide (Ze
neca, Inc. Company), 58.25 g of water and 1
9.5 g of ProJet cyan (Zeneca, In
c. 1.95 g of Duasyn Acid Blue AE SF (Hoechst Celanese C)
corporation) and stirred for 2 hours. Next, this ink was filtered with a surfactant-free cellulose acetate filter having a pore size of 0.45 μm.

Magenta: 22.0 g of ethylene glycol (Caledon Laboratories Ltd.)
d. And 0.15 g of butyl carbitol (Al
(Drich Chemical Company)
And 0.05 g of proxel GXL biocide (Ze
neca, Inc. And 62.8 g of water;
5 g of ProJet Magenta 1T (Zeneca, In
c. Co., Ltd.) and 7.5 g of Acid Red 52 (Tri
con) and was stirred for 2 hours. Next, this ink was filtered with a surfactant-free cellulose acetate filter having a pore size of 0.45 μm.

Yellow: 15.6 g of ethylene glycol (Caledon Laboratories Ltd.)
d. 5.5 g of diethylene glycol (Al)
drich # H2, 645-6) and 0.37 g of butyl carbitol (Aldrich Chemical)
Company) and 0.05 g of proxel
A GXL biocide (Zeneca, Inc.);
45.68 g of water and 32.8 g of ProJet Yellow OAM (Zeneca, Inc.) were mixed and stirred for 2 hours. Next, this ink was used with a pore size of 0.45.
The solution was filtered through a cellulose acetate filter containing no μm surfactant.

After printing and drying, these images were
It was left for 7 days in a constant temperature room set at 50 ° C. and a humidity of 50%. Thereafter, the hanging curl of the paper on which these images are formed is removed from the Xerox Standard Template.
Tested using Curves. Flat curls were also tested. The flat curl value of the tested paper is 4
Within 0mm ± 5.0mm, Hanging curl value is 150
mm ± 5.0 mm and all were inferior. All measurements were taken after a fixed period of 7 days. The optical densities of the developed image were 1.39 (black), 1.22 (cyan), 1.07 (magenta), and 1.12 (yellow). 59μ between colors between black and yellow
m. The water resistance values of these images are 85% (black), 27% (cyan), 28% (magenta), 16%
(Yellow). The lightfastness of these images is 10
They were 0% (black), 95% (cyan), 94% (magenta) and 96% (yellow).

Embodiment II. 50 parts by weight of water as a hydrophilic solvent and 1 part by weight of a polyester latex (Eastman AQ 29D, Eastm
an Chemical Company) and 27 parts by weight of a quaternary monoammonium salt myristyltrimethylammonium bromide (Aldrich) as a mordant.
# 86,042-5) and 1 as an anti-curl compound
2 parts by weight of pantothenol (Aldrich # 29,
578-7) and 2 parts by weight of a poly (dimethylsiloxane) -b-poly (propylene oxide) -b-poly (ethylene oxide) copolymer (Alkasil NEP 73-70, Alkar
il Chemicals) and 1 part by weight of tetramethyldecine diol (Surfynol) as an antifoaming agent
-104, Air Products Company
And a cationic blend of 1 part by weight of methylenebisthiocyanate and dodecylguanidine hydrochloride as a biocide (SLIME TRORX-31, Be)
tz Paper Chem Inc. Co., Ltd.) and 3 parts by weight of poly [N, N-bis (2,
2,6,6-tetramethyl-4-piperidinyl) -1,
6-hexanediamine-co-2,4-dichloro-6-morpholino-1,3,5-triazine], (Cyasor
b UV-3346, # 41, 324-0, Aldri
ch Chemical Company) and 3 parts by weight of colloidal silica (Grace) as a filler.
Chemical Company) and a chemical composition for improving image quality, including a blend of the above, was applied to paper. The coating method was performed by passing through a channel having a nozzle. The nozzle is provided with a water pump near the other end of the nozzle for generating a pressure pulse for discharging 20 ml of the chemical composition to each surface of the substrate. The substrate is then passed through a pair of pressure rolls at a pressure of 75 to 125 psi, from 80 to about 100 psi.
Dried at ° C.

The pattern of the checker board is changed by the processing Co
ultland paper (Champion Paper C
Hercules size 250 manufactured by Ompany
Second) using an acoustic inkjet printer containing the ink of Example I. After printing and drying, these images were left in a constant temperature room set at 23 ° C. and 50% humidity for 7 days. Thereafter, the hanging curls of the paper on which these images are formed are removed by Xerox Standa.
Tested using rd Template Curves. Flat curls were also tested. The flat curl value of the tested paper was within 5 mm ± 1.0 mm, and the hanging curl value was within 40 mm ± 5.0 mm. All measurements were taken after a fixed period of 7 days. The optical density of the image formed and developed on the coated paper prepared as described above is 1.46 (black), 1.43.
(Cyan), 1.21 (magenta) and 1.20 (yellow). The bleed between colors between black and yellow was 29 μm. The water resistance of these images is 93%
(Black), 92% (cyan), 81% (magenta) and 78% (yellow). The lightfastness values of these images are 100% (black), 95% (cyan), 8
6% (magenta) and 84% (yellow). Comparing the results obtained after the processing of Example II with the results of Example I, an increase in the optical density of the image, an increase in the waterfastness of the image, and a decrease in the bleeding value between the colors substantially reduce the lightfastness of the image. It can be seen that this was achieved without any negative influence.

Embodiment III. 25 parts by weight of water and 3 parts by weight of neoprene rubber latex (S
erva Biochemicals) and 3 parts by weight of poly (propylene glycol) (Alkapol PPG-4000, A
lcaril Chemicals), 15 parts by weight of pantothenol (Aldrich # 29,578-7) as a water-soluble paper curl preventing compound, and 1 part by weight of tetramethyldecinediol and amorphous silica (Surfynol-) as defoamers. 104S, Air
Products Company Ltd.) and a cationic blend (SL) of 1 part by weight of methylene bisthiocyanate and dodecylguanidine hydrochloride as a biocide
IME CONTROL RX-31, Betz Paper
Chem Inc. And 49 parts by weight of a quaternary acrylic copolymer latex (HX-42) as a mordant.
3. Interpolymer Corporation
n) and 3 parts by weight of poly [N,
N-bis (2,2,6,6-tetramethyl-4-piperidinyl) -1,6-hexanediamine-co-2,4-dichloro-6-morpholino-1,3,5-triazine]
(Cyasorb UV-3346, # 41,324-
0, Aldrich Chemical Company
y) and 3 parts by weight of calcium carbonate (Microwhite Sylacauga Cal) as a filler.
and a chemical composition for improving the image quality, including a blend of C.I.C.
mg] was weighed out of the ink reservoir in a manner similar to that described in US Pat. No. 5,434,029, applied to paper and dried at 100 ° C. at a pressure of 125 psi.

The pattern of the checkerboard was adjusted to the treated Courtland paper (Champion) prepared as described above.
Hercules, manufactured by Paper Company
(250 seconds in size) using an acoustic inkjet printer containing the ink of Example I.
After printing and drying, these images were taken at 23 ° C and 50% humidity.
Was left in a constant temperature room set for 7 days. Thereafter, the hanging curls of the paper on which these images are formed are removed by Xerox.
Standard Template Curves
Tested using Flat curls were also tested. Flat curl value of tested paper is 5mm ± 1.0
mm, Hanging curl value is 30mm ± 5.0mm
Within and all were excellent. The optical density of the developed image is
1.65 (black), 1.55 (cyan), 1.35
(Magenta) and 1.25 (yellow). The blur between the colors between black and yellow was 10 μm. The water resistance of these images is 95% (black), 94%
(Cyan), 85% (magenta), 82% (yellow)
Met. The lightfastness values of these images are 100% (black), 98% (cyan), 96% (magenta), 90%
(Yellow). Comparing the results of Example III with those of Examples I and II, a further increase in the optical density of the image, an increase in the waterfastness of the image, and a decrease in the bleeding value between colors indicate that the lightfastness of the image It can be seen that this was achieved with an increase in.

Embodiment IV. 50 parts by weight of water and 1 part by weight of a polyester latex (Eas
tman AQ 29D, Eastman Chemi
cal Company) and 2 parts by weight of poly (dimethylsiloxane)-as a water-soluble paper desizing compound.
b-Poly (propylene oxide) -b-poly (ethylene oxide) copolymer (Alkasil NEP 73-
70, manufactured by Alkaril Chemicals)
12 parts by weight of 1,4-
Bis (2-hydroxyethoxy) -2-butyne (Ald
rich # B4, 470-8), 1 part by weight of tetramethyldecinediol as an antifoaming agent and amorphous silica (Surfynol-104S, Air Produ)
cts Company) and a cationic blend of 1 part by weight of methylenebisthiocyanate and dodecylguanidine hydrochloride as a biocide (SLIMET T).
ROL RX-31, Betz Paper Chem
Inc. And 27 parts by weight of a myristyltrimethylammonium bromide quaternary monoammonium salt (Aldrich # 86,042-5) as a mordant, and 3 parts by weight of poly [N, N-bis ( 2,
2,6,6-tetramethyl-4-piperidinyl) -1,
6-hexanediamine-co-2,4-dichloro-6-morpholino-1,3,5-triazine], (Cyasor
b UV-3346, # 41, 324-0, Aldri
ch Chemical Company) and 3 parts by weight of colloidal silica (Grace) as a filler.
Chemical Company) (2 mg) was applied to the image receiving side of the paper using a thermal inkjet head. The pattern of the checker board is converted to the processed Courtland paper (C
H, manufactured by Hampion Paper Company
at 250 degrees C. (circles size 250 seconds) using an acoustic inkjet printer containing the ink of Example I.

After printing and drying, these images were
It was left for 7 days in a constant temperature room set at 50 ° C. and a humidity of 50%. Thereafter, the hanging curl of the paper on which these images are formed is removed from the Xerox Standard Template.
Tested using Curves. Flat curls were also tested. The flat curl value of the tested paper is 5
mm ± 1.0mm, hanging curl value is 30mm
All were excellent within ± 5.0 mm. The optical densities of the images are 1.55 (black), 1.50 (cyan),
1.28 (magenta) and 1.25 (yellow). The bleed between colors between black and yellow was 15 μm. The water resistance values of these images are 95% (black), 90% (cyan), 80% (magenta), 80%
(Yellow). The lightfastness of these images is 10
They were 0% (black), 96% (cyan), 96% (magenta), and 90% (yellow). From these results, it can be seen that the chemical composition for improving image quality of the present invention can be discharged onto paper even through an additional inkjet head, and that improved image quality can be obtained.

Embodiment V. 1 mg of the composition of Example IV was applied to the image receiving surface of the paper using an acoustic inkjet head. The pattern of the checker board is converted to the processed Courtland paper (Champion Pap
er Company, Hercules size 250 s) using an acoustic inkjet printer containing the ink of Example I. After printing and drying, these images were left in a constant temperature room set at 23 ° C. and 50% humidity for 7 days. Thereafter, the hanging curl of the paper on which these images are formed is removed by Xerox Sta.
Tested using the second Template Curves. Flat curls were also tested. The flat curl value of the tested paper was within 10 mm ± 1.0 mm, and the hanging curl value was within 45 mm ± 5.0 mm. The optical densities of the images were 1.50 (black), 1.45 (cyan), 1.28 (magenta), and 1.25 (yellow). The blur between colors between black and yellow was 20 μm. The water resistance values of these images were 95% (black), 90% (cyan), 80% (magenta), and 80% (yellow). The lightfastness of these images is 100% (black),
96% (cyan), 93% (magenta) and 85% (yellow). From these results, it can be seen that the chemical composition for improving image quality of the present invention can be discharged onto paper even through an additional acoustic inkjet head, and thus improved image quality can be obtained.

Based on the information described in the present application, it is needless to say that other embodiments and modifications of the present invention conceived by those skilled in the art and equivalents thereof are included in the scope of the present invention. .

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification FI theme coat ゛ (Reference) G03G 9/08 G03G 9/08 (72) Inventor Robert A. Sprague Co. Saratoga Bougainvillea, California, USA 14605 (72) Inventor Shadi El Malhotra Mississauga Toffee Crescent, Ontario, Canada 4191 (72) Inventor Kirity N. Naik, Mississauga Fowler Drive, Ontario, Canada 1980 (72) Inventor Fereste Resani, Mississauga Pe Brewwood Road, Ontario, Canada 3247 (72) Inventor Daniel Sea Boyles Mississauga Yoville Road, Ontario, Canada 2456 (72) James D. Inventor Mayo Canada Mississauga-Ogden Avenue, Ontario 1421 (72) Inventor Stephen V. Drapel Toronto, Ontario, Canada Glen Glen Grove Avenue West 451

Claims (3)

[Claims] 1. A solvent, a polymer binder, a mordant,
Including a substantially water-soluble anti-curl compound, a substantially water-soluble desizing compound, a light-fast compound, an antifoaming agent, a biocide if necessary, and a filler if necessary A composition comprising: 2. A solvent, a polymer binder, a mordant,
Including a substantially water-soluble anti-curl compound, a substantially water-soluble desizing compound, a light-fast compound, an antifoaming agent, an optional biocide, and an optional filler. A process comprising applying the composition to a substrate. 3. The image formed on the substrate is developed using an inkjet composition, and the substrate is provided with a hydrophilic solvent, a polymeric binder, a mordant, a substantially water-soluble anti-curl compound, An ink jet process, comprising applying a composition comprising a water-soluble desizing compound, a light-fast compound, an antifoaming agent, a biocide, and a filler.