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CN111021149B - Ultrahigh-glossiness ink-jet printing paper and preparation method thereof - Google Patents

Ultrahigh-glossiness ink-jet printing paper and preparation method thereof Download PDF

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Publication number
CN111021149B
CN111021149B CN201911081177.8A CN201911081177A CN111021149B CN 111021149 B CN111021149 B CN 111021149B CN 201911081177 A CN201911081177 A CN 201911081177A CN 111021149 B CN111021149 B CN 111021149B
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parts
weight
refractive
refractive index
low
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CN111021149A (en
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张丽惠
张瑶瑶
王坤
陈思雨
王大庆
柳青
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Lucky Film Co Ltd
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Lucky Film Co Ltd
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    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/52—Cellulose; Derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/62—Macromolecular organic compounds or oligomers thereof obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D21H19/822—Paper comprising more than one coating superposed two superposed coatings, both being pigmented
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/22—Addition to the formed paper
    • D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
    • D21H23/72—Plural serial stages only

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Paper (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

本发明公开了超高光泽度喷墨打印纸及其制备方法。该超高光泽度喷墨打印纸包括：支持体；低折射率淋膜层，所述低折射率淋膜层形成在所述支持体的一侧或两侧；高折射率涂布层，所述高折射率涂布层形成在所述低折射率淋膜层远离所述支持体的一侧。其中，所述低折射率淋膜层包括：有机聚合物和第一无机纳米粒子；所述高折射率涂布层包括：有机粘结剂、第二无机纳米粒子和助剂。该超高光泽度喷墨打印纸通过采用低折射率的淋膜层与高折射率的涂布层相结合，可以获得优异的高光泽度，并保持优异的色彩密度、色彩还原度和吸墨性能。

Figure 201911081177

The invention discloses ultra-high gloss inkjet printing paper and a preparation method thereof. The ultra-high gloss inkjet printing paper comprises: a support; a low-refractive-index coating layer, the low-refractive-index coating layer is formed on one side or both sides of the support; a high-refractive-index coating layer, the The high-refractive-index coating layer is formed on the side of the low-refractive-index coating layer away from the support. Wherein, the low-refractive-index coating layer includes: an organic polymer and first inorganic nanoparticles; the high-refractive-index coating layer includes: an organic binder, a second inorganic nanoparticle and an auxiliary agent. The ultra-high gloss inkjet printing paper can obtain excellent high gloss by combining a low refractive index coating layer with a high refractive index coating layer, while maintaining excellent color density, color reproduction and ink absorption performance.

Figure 201911081177

Description

Ultrahigh-glossiness ink-jet printing paper and preparation method thereof
Technical Field
The invention relates to the field of image output materials, in particular to ultrahigh-glossiness ink-jet printing paper and a preparation method thereof.
Background
High gloss inkjet printing paper can be classified into two types according to the coating process and the coating material: the base material of the swelling type and gap type ink-jet printing paper is generally a double-sided plastic-coated paper base, and an ink absorbing layer of the base material contains a large amount of nano-scale inorganic particles, so that the base material has ultrahigh ink absorbing speed and can effectively prevent water. The high-glossiness ink-jet printing paper is suitable for image output with vivid colors and silver salt imaging picture effect. With the continuous improvement of the printing quality requirement of the market, higher requirements are provided for the ink absorption performance, the color reduction capability, the imaging glossiness and the color density of the ink-jet printing paper.
Chinese patent CN105463932A provides a method for preparing a coating for inkjet printing paper, wherein the preparation process involves a sanding process of the coating liquid, but the process will result in the decrease of ink absorption of inkjet printing paper, and the level that the product glossiness can reach is not disclosed, but from the viewpoint of the product formulation and preparation process, the glossiness can not be judged to exceed 50%. In short, the prior art mostly realizes the high glossiness of the ink-jet printing paper by adjusting or changing the coating formula, but the effect is not ideal. The existing high gloss inkjet printing paper still needs to be improved.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide ultra-high gloss inkjet printing paper and a method of preparing the same. The ultrahigh-glossiness ink-jet printing paper can obtain excellent high glossiness and maintain excellent color density, color reduction and ink absorption performance by combining the low-refractive-index laminating layer with the high-refractive-index coating layer.
In one aspect of the present invention, an ultra-high gloss inkjet printing paper is provided. According to an embodiment of the present invention, the ultra-high gloss inkjet printing paper includes: a support; a low refractive index lamination layer formed on one side or both sides of the support; and the high-refractive-index coating layer is formed on one side, far away from the support, of the low-refractive-index laminating layer. Wherein the low refractive index PE-PE layer comprises: an organic polymer and a first inorganic nanoparticle, the organic polymer comprising a material selected from High Density Polyethylene (HDPE), Low Density Polyethylene (LDP)E) At least one of polyvinylidene fluoride (PVDF), Polycarbonate (PC), polyvinyl chloride (PVC), Polystyrene (PS), fluoropolymer processing aid (PPA), hydroxypropyl cellulose, polyacrylic resin, polyurethane resin, polytetrafluoroethylene, and polyhexafluoropropylene; the first inorganic nanoparticles comprise magnesium fluoride (MgF)2) And silicon dioxide (SiO)2) At least one of; the high refractive index coating layer includes: the organic binder comprises at least one selected from polyvinyl alcohol (PVA), modified polyvinyl alcohol (modified PVA), carboxymethyl cellulose, styrene-butadiene latex and starch; the second inorganic nanoparticles comprise a material selected from the group consisting of alumina (Al)2O3) Zinc oxide (ZnO), cerium oxide (CeO)2) Barium oxide (BaO), zirconium dioxide (ZrO)2) Titanium dioxide (TiO)2) At least one of zinc sulfide (ZnS), lead sulfide (PbS), gallium phosphide (GaS), indium phosphide (InS) and silicon (Si), and the auxiliary agent includes at least one selected from nitric acid and N, N-Dimethylformamide (DMF).
According to the ultra-high gloss inkjet printing paper of the embodiment of the invention, the support with the low refractive index shower film layer can be obtained by forming the low refractive index shower film layer on the support (also called base paper) by using the low refractive index material. Through the optical design of a film structure combining a high-refractive-index coating layer formed by a high-refractive-index material and a low-refractive-index laminating film layer, the ultrahigh-gloss ink-jet printing paper can obtain excellent high gloss and keep excellent color density, color reduction and ink absorption according to the interference constructive principle of light waves.
In addition, the ultra-high gloss inkjet printing paper according to the above embodiment of the present invention may also have the following additional technical features:
in some embodiments of the invention, the low refractive index tie layer: 50-70 parts by weight of high-density polyethylene, 10-30 parts by weight of low-density polyethylene, 3-15 parts by weight of polyvinylidene fluoride, 1-9 parts by weight of polycarbonate, 3-7 parts by weight of polyvinyl chloride, 1-7 parts by weight of polystyrene, 1-13 parts by weight of fluorine-containing polymerization processing aid, 1-15 parts by weight of hydroxypropyl cellulose, 1-10 parts by weight of polyacrylic resin, 1-5 parts by weight of polyurethane resin, 1-5 parts by weight of polytetrafluoroethylene, 1-5 parts by weight of polyhexafluoropropylene, 1-15 parts by weight of magnesium fluoride and 1-9 parts by weight of silicon dioxide; the high refractive index coating layer includes: 10-30 parts by weight of the organic binder, 20-50 parts by weight of aluminum oxide, 1-10 parts by weight of zinc oxide, 1-10 parts by weight of cerium dioxide, 1-10 parts by weight of barium oxide, 1-10 parts by weight of zirconium dioxide, 1-10 parts by weight of titanium dioxide, 1-9 parts by weight of zinc sulfide, 1-9 parts by weight of lead sulfide, 1-15 parts by weight of gallium phosphide, 1-9 parts by weight of indium phosphide, 10-25 parts by weight of nitric acid, 1-20 parts by weight of silicon and 10-25 parts by weight of N, N-dimethylformamide.
In some embodiments of the invention, the difference between the refractive indexes of the low refractive index lamination layer and the high refractive index coating layer is 0.20-2.66.
In some embodiments of the invention, the refractive index of the low refractive index lamination layer is 1.34-1.56, and the refractive index of the high refractive index coating layer is 1.76-4.00.
In some embodiments of the present invention, the first inorganic nanoparticles have an average particle size of 10 to 500 nm.
In some embodiments of the present invention, the second inorganic nanoparticles have an average particle size of 10 to 200 nm.
In some embodiments of the present invention, the high refractive index coating layer has a thickness of 10 to 72 μm.
In another aspect of the present invention, the present invention provides a method of preparing the ultra-high gloss inkjet printing paper of the above embodiment. According to an embodiment of the invention, the method comprises: (1) providing a support; (2) mixing an organic polymer and first inorganic nanoparticles to obtain a laminating composition; forming a low refractive index lamination layer on one side or both sides of the support by using the lamination composition; (3) mixing the organic binder, the second inorganic nanoparticles and the auxiliary agent to obtain a coating liquid composition; and forming a high-refractive-index coating layer on the side, away from the support, of the low-refractive-index laminating layer by using the coating liquid composition to obtain the ultrahigh-gloss ink-jet printing paper.
According to the method for preparing the ultrahigh-gloss ink-jet printing paper, the low-refractive-index shower film layer is formed on one side or two sides of the support through the low-refractive-index material to obtain the support of the low-refractive-index shower film layer, the high-refractive-index coating layer is formed on one side of the low-refractive-index shower film layer through the high-refractive-index material to obtain the multilayer film structure with the refractive index difference, and the prepared ultrahigh-gloss ink-jet printing paper can obtain excellent high gloss and has excellent color density, color reduction degree and ink absorption performance according to the interference phase growth principle of light waves.
In addition, the method of preparing the ultrahigh-gloss inkjet printing paper according to the above-described embodiment of the present invention may further have the following additional technical features:
in some embodiments of the present invention, in the step (2), the mixing is performed at 300 to 350 ℃.
In some embodiments of the present invention, the coating liquid composition has a viscosity of 30 to 50 mPas.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of an ultra-high gloss inkjet printing paper according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a method of preparing ultra-high gloss inkjet printing paper according to one embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail. The following examples are illustrative only and are not to be construed as limiting the invention. The examples, where specific techniques or conditions are not indicated, are to be construed according to the techniques or conditions described in the literature in the art or according to the product specifications. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products commercially available.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In one aspect of the present invention, an ultra-high gloss inkjet printing paper is provided. According to an embodiment of the present invention, referring to fig. 1, the ultra-high gloss inkjet printing paper includes: a support 100, a low refractive index coating layer 200, and a high refractive index coating layer 300. The low refractive index lamination film 200 layer is formed on one side or both sides of the support 100; the high refractive index coating layer 300 is formed on the side of the low refractive index shower film layer 200 away from the support 100. Wherein, low refractive index drenches rete: an organic polymer and first inorganic nanoparticles, the organic polymer including at least one selected from the group consisting of high density polyethylene, low density polyethylene, polyvinylidene fluoride, polycarbonate, polyvinyl chloride, polystyrene, fluoropolymer processing aids, hydroxypropyl cellulose, polyacrylic resins, polyurethane resins, polytetrafluoroethylene, and polyhexafluoropropylene; the first inorganic nanoparticles include at least one of magnesium fluoride and silicon dioxide. The high refractive index coating layer includes: the organic binder comprises at least one selected from polyvinyl alcohol, modified polyvinyl alcohol, carboxymethyl cellulose, styrene-butadiene latex and starch; the second inorganic nanoparticles include at least one selected from alumina, zinc oxide, ceria, barium oxide, zirconia, titania, zinc sulfide, lead sulfide, gallium phosphide, indium phosphide, and silicon, and the auxiliary includes at least one selected from nitric acid and N, N-dimethylformamide.
The inventors found that forming a composite film layer structure including a low refractive index coating layer and a high refractive index coating layer on a support according to the principle of interference constructive of light waves can significantly improve the glossiness of the product and enable the product to obtain excellent color density, color reduction and ink absorption. Specifically, the specific material of the support is not particularly limited, and supports commonly used in the art may be used. The low refractive index curtain coating layer comprises the organic polymer and the first inorganic nanoparticles, and the high refractive index coating layer comprises the organic binder, the second inorganic nanoparticles and the auxiliary agent. The refractive index difference between the low-refractive-index laminating layer and the high-refractive-index coating layer formed by the materials is proper, so that constructive interference can be generated on light waves, and the product obtains excellent high glossiness and keeps excellent color density, color reduction and ink absorption.
The ultra high gloss inkjet printing paper according to an embodiment of the present invention is further described in detail below.
According to an embodiment of the present invention, the low refractive index shower film layer may include: 50-70 parts of high-density polyethylene, 10-30 parts of low-density polyethylene, 3-15 parts of polyvinylidene fluoride, 1-9 parts of polycarbonate, 3-7 parts of polyvinyl chloride, 1-9 parts of polycarbonate, 1-13 parts of fluoropolymer processing aid, 1-15 parts of hydroxypropyl cellulose, 1-10 parts of polyacrylic resin, 1-5 parts of polyurethane resin, 1-5 parts of polytetrafluoroethylene, 1-5 parts of polyhexafluoropropylene, 1-15 parts of magnesium fluoride and 1-9 parts of silicon dioxide. The inventor finds that by further optimizing the components and the content of the low-refractive index film coating layer of the ultrahigh-gloss ink-jet printing paper, the product can be further ensured to have excellent color density, color reduction degree and ink absorption performance and the refractive index value is appropriate by adopting the film layers with the components and the content. If the contents of the high-density polyethylene and the low-density polyethylene are too high, the refractive index of the low-refractive-index laminating layer is possibly too high, and a sufficient refractive index difference cannot be formed between the low-refractive-index laminating layer and the high-refractive-index coating layer, so that the performances such as the glossiness and the like of a product are influenced; if the contents of the high-density polyethylene and the low-density polyethylene are too low, the mechanical strength of the low-refractive-index PE coating layer is too low to meet the requirement. If the content of polytetrafluoroethylene and polyhexafluoropropylene is too high, the compatibility of the components in the low refractive index PE-PE layer can be reduced. If the content of the fluoropolymer processing aid, the hydroxypropyl cellulose, the polyacrylic resin, the polyurethane resin, the magnesium fluoride and the silicon dioxide is too low, the refractive index of the low-refractive-index laminating layer is not obviously reduced, and a sufficient refractive index difference can not be formed between the low-refractive-index laminating layer and the high-refractive-index coating layer, so that the performances of the product, such as glossiness, are influenced. If the content of the fluoropolymer processing aid and the content of the hydroxypropyl cellulose are too high, the mechanical strength of the low-refractive-index film coating layer is possibly too low to meet the requirement. If the content of the polyacrylic resin is too high, the raw materials of the low-refractive-index PE coating layer can be difficult to blend in the preparation process. If the content of the urethane resin is too high, the hardness of the low refractive index curtain film layer may be too low. If the dosage of the magnesium fluoride and the silicon dioxide is too high, the mixed material can not be coated in the preparation process.
According to an embodiment of the present invention, the high refractive index coating layer may include: 10-30 parts by weight of the organic binder, 20-50 parts by weight of aluminum oxide, 1-10 parts by weight of zinc oxide, 1-10 parts by weight of cerium dioxide, 1-10 parts by weight of barium oxide, 1-10 parts by weight of zirconium dioxide, 1-10 parts by weight of titanium dioxide, 1-9 parts by weight of zinc sulfide, 1-9 parts by weight of lead sulfide, 1-15 parts by weight of gallium phosphide, 1-9 parts by weight of indium phosphide, 10-25 parts by weight of nitric acid, 1-20 parts by weight of silicon and 10-25 parts by weight of N, N-dimethylformamide. The inventor finds that by further optimizing the components and contents of the high-refractive index coating layer of the ultrahigh-gloss ink-jet printing paper, the product can be further ensured to have excellent color density, color reduction degree and ink absorption performance and the refractive index value is appropriate by adopting the film layers with the components and contents. If the contents of the organic binder, nitric acid, zinc sulfide and gallium phosphide are too high, the ink absorption performance of a high-refractive-index coating layer can be reduced; if the content of the organic binder is too low, it may cause the high refractive index coating layer to be easily cracked. If the content of alumina is too high, it may result in that the high refractive index coating layer raw material is not easily formed into a film during the production process, and if the content of alumina is too low, it may result in that the ink absorption property of the high refractive index coating layer is lowered. If the content of nitric acid is too low, it may result in a reduction in the gloss of the product. If the content of zinc sulfide and gallium phosphide is too low, the refractive index of the high-refractive-index coating layer is too low, and a sufficient refractive index difference cannot be formed between the high-refractive-index coating layer and the low-refractive-index lamination layer, so that the performances such as the glossiness of a product are influenced.
According to the embodiment of the invention, the difference between the refractive index of the refractive index laminating layer and the refractive index of the high-refractive index coating layer is 0.20-2.66. By controlling the difference of the refractive indexes of the low refractive index laminating layer and the high refractive index coating layer within the range, the glossiness of the product can be further improved.
According to an embodiment of the present invention, the low refractive index lamination layer has a refractive index of 1.34 to 1.56, and the high refractive index coating layer has a refractive index of 1.76 to 4.00. According to the interference and constructive principle of light waves, the glossiness of the product can be further improved by controlling the refractive indexes of the low-refractive-index laminating layer and the high-refractive-index coating layer to be in the ranges respectively.
According to the embodiment of the invention, in order to achieve the difference of the refractive index between the high refractive index coating layer and the low refractive index lamination layer within the above range, the refractive index of the coating layer can be increased, or the refractive index of the lamination layer can be decreased, or the refractive index of the coating layer can be increased and the refractive index of the lamination layer can be decreased by adjusting the compositions of the coating layer and the lamination layer respectively.
According to an embodiment of the present invention, the first inorganic nanoparticles may have an average particle diameter of 10 to 500nm, for example, 10nm, 30nm, 50nm, 90nm, 100nm, 150nm, 200nm, 230nm, 270nm, 300nm, 350nm, 400nm, 500nm, and the like. The second inorganic nanoparticles may have an average particle diameter of 10 to 200nm, for example, 10nm, 20nm, 30nm, 60nm, 80nm, 100nm, 150nm, 180nm, or 200 nm. By controlling the particle size of the first inorganic nanoparticles and the second inorganic nanoparticles within the above range, the first inorganic nanoparticles and the second inorganic nanoparticles can be further mixed with other components in the film layer to form a homogeneous system, and the performance of the first inorganic nanoparticles and the performance of the second inorganic nanoparticles can be further exerted.
According to an embodiment of the present invention, the thickness of the high refractive index coating layer may be 10 to 72 μm, for example, 10 μm, 20 μm, 30 μm, 31 μm, 32 μm, 33 μm, 34 μm, 35 μm, 36 μm, 50 μm, or 72 μm. Thereby, the ink absorption of the product can be further improved, and the process control is facilitated. The inventors have found that if the thickness of the high refractive index coating layer is too large, it results in too high cost and difficult process control; if the thickness of the high refractive index coating layer is too small, it may result in a decrease in ink absorption of the product.
In another aspect of the present invention, the present invention provides a method of preparing the ultra-high gloss inkjet printing paper of the above embodiment. Referring to fig. 2, according to an embodiment of the invention, the method comprises:
s100: providing a support
According to an embodiment of the present invention, a specific material of the support is not particularly limited, and a base paper commonly used in the art may be used as the support.
S200: forming a low refractive index lamination layer
In the step, mixing an organic polymer and first inorganic nanoparticles to obtain a laminating composition; a low refractive index coating layer is formed on one side or both sides of the support by using the coating composition. Here, when the low refractive index lamination layers are formed on both sides of the support at the same time, the low refractive index lamination layer formed on the back surface of the support may be used as a back layer of the printing paper product.
According to an embodiment of the present invention, the mixing may be performed at 300 to 350 ℃, for example, 300 ℃, 315 ℃, 330 ℃ or 350 ℃. Preferably, the mixing is carried out at 315-330 ℃. The inventors found that if the mixing temperature is below 315 ℃, the uniformity of the material mixing is reduced, but still better than the mixing effect at temperatures below 300 ℃; if the mixing temperature is higher than 330 c, the material is partially decomposed, and when the temperature is higher than 350 c, the material is severely decomposed.
S300: forming a high refractive index coating layer
In the step, an organic binder, second inorganic nanoparticles and an auxiliary agent are mixed to obtain a coating liquid composition; forming a high-refractive-index coating layer on at least one part of the surface of the low-refractive-index PE coating layer far away from the support by using a coating liquid composition,the ultrahigh-gloss inkjet printing paper is obtained. It should be noted that the specific concentration of nitric acid in the additive is not particularly limited as long as it is capable of providing HNO in the final product3The content meets the formula requirement.
According to an embodiment of the present invention, the viscosity of the coating liquid composition is 30 to 50 mPas, for example 30 mPas, 35 mPas, 40 mPas, 45 mPas or 50 mPas. The inventors found that if the viscosity of the coating liquid composition is too high, the coating is not favorable, and if the viscosity of the coating liquid composition is too low, the coating is liable to crack.
In addition, it should be noted that all the features and advantages described above for the ultrahigh-gloss inkjet printing paper are also applicable to the method for preparing the ultrahigh-gloss inkjet printing paper, and are not described in detail herein.
The invention will now be described with reference to specific examples, which are intended to be illustrative only and not to be limiting in any way.
General procedure
(1) Weighing the materials according to the formula of the laminating composition in the table 1, uniformly mixing the materials by using an internal mixer, and heating the mixed materials to 310 ℃ to obtain the laminating composition.
(2) And respectively forming low-refractive-index film layers on two sides of the support by using the film coating composition to obtain a low-refractive-index support, and measuring the refractive index value of the low-refractive-index support.
(3) Weighing the materials according to the formula of the coating liquid composition in the table 2, uniformly stirring, heating the obtained mixed materials to 50 ℃ through water bath, and keeping the temperature for 1h to obtain the coating liquid composition with the viscosity of 30-50 mPa & s.
(4) And forming a high-refractive-index coating layer on the surface of the low-refractive-index laminating layer far away from the support by using the coating liquid composition to obtain the ultrahigh-gloss ink-jet printing paper.
TABLE 1 laminating composition formulation
Figure BDA0002263998340000071
Figure BDA0002263998340000081
TABLE 2 coating liquid composition formulation
Raw materials Coating liquid 1 Coating liquid 2 Coating liquid 3 Coating liquid 4 Coating liquid 5 Coating liquid 6
PVA 15 0 0 0 0 15
Modified PVA 0 15 0 0 0 0
CMC 0 0 15 0 0 0
Styrene-butadiene latex 0 0 0 15 0 0
Starch 0 0 0 0 15 0
Alumina oxide 20 20 20 20 25 35
Titanium dioxide 10 0 5 5 0 0
Lead sulfide 0 0 0 0 0 0
Zinc sulfide 0 0 0 0 0 0
Gallium phosphide 0 10 0 0 0 0
Indium phosphide 0 5 0 0 0 0
Zinc oxide 0 0 0 10 5 0
Cerium oxide 5 0 10 0 5 0
DMF 15 15 15 15 15 15
HNO3 15 15 15 15 15 15
H2O 20 20 20 20 20 20
Examples 1 to 6
Ultra-high gloss inkjet printing paper was prepared according to a general method. The coating composition formulations in examples 1 to 6 all used "coating 2" in table 1, the coating composition formulation in example 1 used "coating 1" in table 2, the coating composition formulation in example 2 used "coating 2" in table 2, the coating composition formulation in example 3 used "coating 3" in table 2, the coating composition formulation in example 4 used "coating 4" in table 2, the coating composition formulation in example 5 used "coating 5" in table 2, and the coating composition formulation in example 6 used "coating 6" in table 2.
Examples 7 to 11
Ultra-high gloss inkjet printing paper was prepared according to a general method. The coating composition formulations in examples 7 to 9 all used "coating film 1" in table 1, "the coating composition formulation in example 7 used" coating liquid 1 "in table 2," the coating composition formulation in example 8 used "coating liquid 2" in table 2, "the coating composition formulation in example 9 used" coating liquid 3 "in table 2," the coating film 3 "in table 1 + coating liquid 5" in table 2, and the coating film 4 "in table 1 + coating liquid 4" in table 2 in example 11.
Comparative example 1
The laminating composition was prepared according to step (1) of the general method. In comparative example 1, "coated film 5" in table 1 + "coating liquid 6" in table 2 was used.
Test experiments
The specific instrument and test method are as follows:
refractive index: film thickness gauge, model number, manufactured by american FILMETRICS corporation: f-20. After obtaining the low refractive index support, the refractive index was first measured, and then the high refractive index coating layer was formed.
Gloss: PG-160 gloss meter, measuring the surface gloss at an incident angle of 60 deg..
A printer: Epson-L805 printer.
Color density: the X-Rite310 densitometer measures the monochromatic reflection density.
Ink buildup phenomenon: if the ink absorption speed of the printed layer is low, ink drops reaching the surface of the coating cannot spread transversely, ink drop aggregation occurs, and color spots appear in the image.
The test results are shown in Table 3.
TABLE 3 test results
Figure BDA0002263998340000091
Figure BDA0002263998340000101
The test result shows that the low-refractive-index support prepared by the formula of the laminating composition disclosed by the embodiment of the invention has a proper refractive index value, can effectively ensure that the reflected light of visible light in a high-refractive-index coating layer and a low-refractive-index laminating layer generates constructive interference, the glossiness (between 50 and 80%) and the color density of a product are excellent, and the ink accumulation phenomenon does not occur in a printing test. The low-refractive-index support prepared by the formula of the comparative example laminating composition has too low refractive index value, so that constructive interference of light waves is not obvious, and the glossiness of a product is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (9)

1. An ultra-high gloss ink jet printing paper, comprising:
a support;
a low refractive index lamination layer formed on one side or both sides of the support;
the high-refractive-index coating layer is formed on one side, far away from the support, of the low-refractive-index laminating layer;
wherein,
the low refractive index PE-coated layer comprises: an organic polymer and first inorganic nanoparticles, the organic polymer including at least one selected from the group consisting of high density polyethylene, low density polyethylene, polyvinylidene fluoride, polycarbonate, polyvinyl chloride, polystyrene, fluoropolymer processing aids, hydroxypropyl cellulose, polyacrylic resins, polyurethane resins, polytetrafluoroethylene, and polyhexafluoropropylene; the first inorganic nanoparticles comprise at least one of magnesium fluoride and silicon dioxide;
the high refractive index coating layer includes: the organic binder comprises at least one selected from polyvinyl alcohol, modified polyvinyl alcohol, carboxymethyl cellulose, styrene-butadiene latex and starch; the second inorganic nanoparticles include at least one selected from alumina, zinc oxide, ceria, barium oxide, zirconia, titania, zinc sulfide, lead sulfide, gallium phosphide, indium phosphide, and silicon, and the auxiliary includes at least one selected from nitric acid and N, N-dimethylformamide;
the difference value of the refractive indexes of the low-refractive-index film lamination layer and the high-refractive-index coating layer is 0.20-2.66.
2. The ultra-high gloss inkjet printing paper according to claim 1,
the low refractive index PE-coated layer comprises: 50-70 parts by weight of high-density polyethylene, 10-30 parts by weight of low-density polyethylene, 3-15 parts by weight of polyvinylidene fluoride, 1-9 parts by weight of polycarbonate, 3-7 parts by weight of polyvinyl chloride, 1-7 parts by weight of polystyrene, 1-13 parts by weight of a fluoropolymer processing aid, 1-15 parts by weight of hydroxypropyl cellulose, 1-10 parts by weight of polyacrylic resin, 1-5 parts by weight of polyurethane resin, 1-5 parts by weight of polytetrafluoroethylene, 1-5 parts by weight of polyhexafluoropropylene, 1-15 parts by weight of magnesium fluoride and 1-9 parts by weight of silicon dioxide;
the high refractive index coating layer includes: 10-30 parts by weight of the organic binder, 20-50 parts by weight of aluminum oxide, 1-10 parts by weight of zinc oxide, 1-10 parts by weight of cerium dioxide, 1-10 parts by weight of barium oxide, 1-10 parts by weight of zirconium dioxide, 1-10 parts by weight of titanium dioxide, 1-9 parts by weight of zinc sulfide, 1-9 parts by weight of lead sulfide, 1-15 parts by weight of gallium phosphide, 1-9 parts by weight of indium phosphide, 10-25 parts by weight of nitric acid, 1-20 parts by weight of silicon and 10-25 parts by weight of N, N-dimethylformamide.
3. The ultra-high gloss inkjet printing paper according to claim 1, wherein the low refractive index lamination layer has a refractive index of 1.34 to 1.56, and the high refractive index coating layer has a refractive index of 1.76 to 4.00.
4. The ultra-high gloss inkjet printing paper according to claim 1, wherein the first inorganic nanoparticles have an average particle diameter of 10 to 500 nm.
5. The ultra-high gloss inkjet printing paper according to claim 1, wherein the second inorganic nanoparticles have an average particle diameter of 10 to 200 nm.
6. The ultra-high gloss inkjet printing paper according to claim 1, wherein the thickness of the high refractive index coating layer is 10 to 72 μm.
7. A method of preparing the ultrahigh gloss inkjet printing paper according to any one of claims 1 to 6, comprising:
(1) providing a support;
(2) mixing an organic polymer and first inorganic nanoparticles to obtain a laminating composition; forming a low refractive index lamination layer on one side or both sides of the support by using the lamination composition;
(3) mixing the organic binder, the second inorganic nanoparticles and the auxiliary agent to obtain a coating liquid composition; and forming a high-refractive-index coating layer on the side, away from the support, of the low-refractive-index laminating layer by using the coating liquid composition to obtain the ultrahigh-gloss ink-jet printing paper.
8. The method according to claim 7, wherein in the step (2), the mixing is performed at 300 to 350 ℃.
9. The method according to claim 7, wherein the viscosity of the coating liquid composition is 30 to 50 mPas.
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