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Waterproofing ink-jet printing media and its production

A technology of inkjet printing and medium, applied in the field of waterproof inkjet printing medium and its preparation, which can solve the problems of no description of performance, no description of ink absorption and drying time, no description of water resistance, etc., and achieve the effect of simple preparation procedure

Active Publication Date: 2008-06-11
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN1769588A discloses a special coating for nano-environmentally friendly color digital printing paper. The ink-absorbing layer contains nano-scale titanium dioxide, silicon dioxide, calcium carbonate and china clay. The patent has high solid content and can adapt to high-speed coating and Requirements for one coat, but no other properties described
[0005] Chinese patent CN1775548A discloses a kind of inkjet printing paper, and its ink absorbing layer contains inorganic pigments calcium carbonate, silicon dioxide, kaolin or their mixtures. Ink properties and drying time not described
[0006] Chinese patent CN1544252A discloses a waterproof high-gloss inkjet printing medium. The medium includes a support and an ink-absorbing layer. 200m 2 / g of inorganic pigments and adhesives, the medium can absorb both dye ink and pigment ink, has a high-gloss surface, fast drying after printing, waterproof, anti-bleeding, wherein the ink-absorbing layer contains inorganic pigment dioxide Silicon or alumina, but the patent does not describe friction resistance
[0008] Chinese patent CN1145558C discloses an inkjet recording material whose pigment layer includes at least one lower layer containing barium sulfate and a mixture of at least two pigments containing alumina as the main pigment or alumina, silica, barium sulfate and barium oxide The upper layer of the patent has high ink absorption, short drying time and good rub resistance, but does not describe water resistance
[0009] Chinese patent CN1283723A discloses a high-gloss inkjet recording material, wherein the ink-absorbing layer contains inorganic pigments with a particle size of 0.01-1.0 μm and an inner pore volume—silica and alumina, but the covering layer contains hydrophilic Water-based gelatin, the water resistance of the recording material is not good, in addition, the patent does not describe the light resistance and friction resistance
[0010] Chinese patent CN1393346A discloses a kind of ink-jet recording material, wherein in addition to containing inorganic pigment silicon dioxide in the ink absorbing layer, it also contains organic metal salt and cationic dye fixing agent that metal cation is divalent or trivalent, thereby improving The light fastness and ozone fastness of the coating, but the patent does not describe the drying speed of the ink after printing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] The preparation method of pseudo-boehmite I (modified):

[0038] formula:

[0039] Industrial grade pseudoboehmite 15.00g

[0040] (20~60nm, specific surface area (BET) is 200~400m 2 / g, the microscopic morphology is fibrous)

[0041] Titanate coupling agent (industrial grade) 0.45~1.00g

[0042] Isopropanol (analytical pure) 145.00g

[0043] Mix 15.00g of industrial-grade pseudo-boehmite with 135.00g of isopropanol for beating, and stir evenly; mix 0.45-1.00g of titanate coupling agent with 10.00g of isopropanol, stir for 10 minutes, and add to the above-mentioned pseudo-boehmite In the bauxite slurry, heat up, stir rapidly for a certain period of time, filter with suction, and dry in the air. (Note: Isopropanol is recyclable and can be reused without treatment) The preparation method of pseudo-boehmite II:

[0044] formula:

[0045] Sodium hydroxide (analytical pure) 9.60g

[0046] Aluminum hydroxide (analytical pure) 15.60g

[0047] Nitric acid (analytically...

Embodiment 1

[0051] formula:

[0052] PVA (degree of alcoholysis 87.0-89.0, degree of polymerization 3500) 1.66g

[0053] Pseudoboehmite I 9.00g

[0054] Pseudoboehmite II 1.00g

[0055] Acetic acid (analytical pure) 0.29g

[0056] Deionized water 57.94g

[0057] Weigh 17.94g of deionized water, put it into a three-necked bottle, stir, add 1.66g of PVA, heat up to 98°C, continue stirring for 1h, and drop to room temperature to obtain a PVA solution; 9.00g of pseudo-boehmite I Add into a beaker containing 20.00g of deionized water, stir electromagnetically, add 1.00g of pseudoboehmite II into a three-necked bottle containing 20.00g of deionized water and 0.29g of acetic acid, stir mechanically, and then mix the two Mix the pseudo-boehmite slurry and continue to stir for 20 minutes; mix the PVA solution and the pseudo-boehmite slurry, stir evenly, and let stand to defoam to obtain a coating solution; apply the coating solution to the Dry on RC paper base at 50°C for 20min.

Embodiment 2

[0059] formula:

[0060] PVA (degree of alcoholysis 87.0-89.0, degree of polymerization 3500) 1.66g

[0061] Pseudoboehmite I 8.00g

[0062] Pseudoboehmite II 2.00g

[0063] Acetic acid (analytical pure) 0.35g

[0064] Deionized water 57.94g

[0065] Weigh 17.94g of deionized water, put it into a three-necked bottle, stir, add 1.66g of PVA, heat up to 98°C, continue to stir for 1h, and drop to room temperature to obtain a PVA solution; 8.00g of pseudo-boehmite I Add into a beaker containing 20.00g of deionized water, stir electromagnetically, add 2.00g of pseudoboehmite II into a three-necked bottle containing 20.00g of deionized water and 0.35g of acetic acid, stir mechanically, and then mix the two Mix the pseudo-boehmite slurry and continue to stir for 20 minutes; mix the PVA solution and the pseudo-boehmite slurry, stir evenly, and let stand to defoam to obtain a coating solution; apply the coating solution to the Dry on RC paper base at 50°C for 20min.

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Abstract

A water-proof medium for ink-jet print is composed of a substrate layer and an ink-absorbing layer prepared from inorganic pigment and adhesive. Said inorganic pigment is the nanofiber-shaped alpha-AlO(OH) and nanoflake-shaped alpha-AlO(OH).

Description

technical field [0001] The invention relates to a waterproof inkjet printing medium and a preparation method thereof. The inkjet printing medium has the characteristics of fast ink absorption, instant drying, and certain waterproof, light-resistant and friction-resistant properties. Background technique [0002] Inkjet recording materials usually consist of a carrier and an ink-absorbing layer coated on the carrier. The ink-absorbing layer can be roughly classified into two types: one comprising a water-soluble polymer, and the other comprising an inorganic pigment and a resin binder. In the first type of ink-absorbing layer, the ink is absorbed by the swollen water-soluble polymer. Since it forms a continuous and uniform film, the gloss is excellent, but the ink-absorbing performance (ink absorption speed, drying speed) is low, and in addition , the waterproof and light resistance properties are not too remarkable; in the second type of ink-absorbing layer, the ink is abs...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41M5/50
Inventor 李伟张明慧陶克毅王广磊
Owner NANKAI UNIV
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