WO2020181792A1 - 一种适用于高速打印的涂布卡纸及其制备方法 - Google Patents

一种适用于高速打印的涂布卡纸及其制备方法 Download PDF

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WO2020181792A1
WO2020181792A1 PCT/CN2019/114540 CN2019114540W WO2020181792A1 WO 2020181792 A1 WO2020181792 A1 WO 2020181792A1 CN 2019114540 W CN2019114540 W CN 2019114540W WO 2020181792 A1 WO2020181792 A1 WO 2020181792A1
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coating
parts
coat
core
coated cardboard
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French (fr)
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陈港
张俊奇
蔡庆辉
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华南理工大学
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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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • D21H21/54—Additives of definite length or shape being spherical, e.g. microcapsules, beads
    • 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

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  • the invention belongs to the technical field of papermaking, printing and packaging, and in particular relates to a coated cardboard suitable for high-speed printing and a preparation method thereof.
  • Hanhong Group has successfully developed an industrial digital printer for digital printing on corrugated cardboard. For the first time, it uses Single Pass technology equipped with Kyocera nozzles to enable digital printing on cartons. Transition from traditional scanning printing to industrial-grade rapid production, with a printing speed of up to 150m/min and a printing accuracy of 600x1800dpi. This high-speed printing method puts forward new requirements and challenges on inkjet printing paper.
  • the reason for this problem is that the printing mode (Single Pass) of the industrial digital printer is different from that of the existing inkjet printers.
  • Most of the existing inkjet printers are scanning printing, the nozzles are horizontal scanning movement, and the paper is vertical movement. The movement direction of the two is vertical. At the same time, because the scanning printing speed is slow, the relative speed difference generated when the ink and the paper coating are in contact is small.
  • the interaction between the ink and the paper coating satisfies the balance of ink penetration and diffusion, thus printing High-density and full-color patterns; Industrial digital printer Single Pass printing mode, the ink head position is fixed, the paper passes through the lower end of the ink head at high speed, and the ink head ejects ink to the surface of the paper through a piezoelectric method. There is a large speed difference between the ink and the paper due to the deformation of the ink drop when the ink contacts the paper. At the same time, it also affects the penetration and diffusion of the ink and the paper, destroying the balance of ink penetration and diffusion, and the resulting paper It is manifested by problems such as more streaks of whiteness and poor printing effect.
  • the present invention provides a coated cardboard suitable for high-speed printing and a preparation method thereof.
  • the invention provides a coated cardboard suitable for high-speed printing and a preparation method thereof, which are used to solve the technical defects in the prior art and prepare coated cardboard suitable for high-speed printing.
  • the invention designs and constructs a porous coating. Through the optimization of the coating structure and the application of pigments of different scales, the ink and the paper can still achieve the penetration and diffusion of the ink and the coating under the condition that there is a large speed difference between the ink and the paper. balance.
  • the porous coating is composed of spherical calcium carbonate particles of different particle sizes, combined with adhesives and cationic fixing agents to form a functional coating for coated cardboard, suitable for the high-speed printing mode of industrial digital printers ( 50-150m/min).
  • the present invention provides a coated cardboard suitable for high-speed printing (50-150m/min), including a base paper layer and a coating layer; the base paper layer has a basis weight of 100-280g/m 2 ; the coating layer Including base coat, core coat and top coat.
  • the raw materials of the primer layer include the following materials:
  • the raw materials of the core coating include the following substances:
  • the top coating is a functional coating
  • the raw materials of the top coating include the following substances:
  • the adhesive in the raw materials of the base coating and the core coating is one or more of polyvinyl acetate latex, styrene butadiene latex, styrene-acrylic latex or coated starch.
  • the adhesive described in the top coating material is more than one of polyvinyl alcohol, modified starch, and carboxymethyl cellulose;
  • the cationic fixing agent in the top coating material is quaternary polyammonium One or more of salt, cationic polyamine or water-based polyurethane;
  • the defoaming agent in the top coating material is more than one of mineral oil defoaming agent, silicone defoaming agent or polyether defoaming agent.
  • the quaternary polyammonium salt includes polydimethylaminoethyl acrylate quaternary ammonium chloride and polydimethyldiallylammonium chloride;
  • the cationic polyamine includes polyvinylamine and polyethyleneimine.
  • the calcium carbonate described in the top coating material is spherical particles.
  • the particle size of calcium carbonate is sized as a percentage by mass of 0-0.4um accounting for 5-8%, and particle diameter 0.4-1um accounting for 75%. -85%, the particle size of 1um-2um accounts for 10-25%.
  • the present invention provides a method for preparing the above-mentioned coated cardboard suitable for high-speed printing, including the following steps:
  • the solid content of the primer coating in step (1) is 50-68%; the solid content of the core coating coating in step (1) is 50-68%; the solid content of the top coating in step (1) The solid content of the coating is 40-60%.
  • step (2), step (3) and step (4) include knife coating, bar coating and curtain coating; step (2), step (3) and step ( 4)
  • the drying temperature is 70-160°C.
  • the temperature of the calendering in step (5) is 60-230°C
  • the pressure of the calendering in step (5) is 10-60 kN/m
  • the coating of the primer layer in step (2) The amount is 7-15 g/m 2
  • the coating amount of the core coating in step (3) is 6-15 g/m 2
  • the coating amount of the top coating in step (4) is 4-12 g/m 2 .
  • the technical solution of the present invention is different from the existing technical solutions that use silica.
  • the technical solutions that use silica mostly use the small particle size, high specific surface area, and high oil absorption value of silica to obtain an ink-absorbing coating.
  • the osmotic absorption effect is strong, and the diffusion effect is weak.
  • the coating is suitable for low-speed printing mode.
  • calcium carbonate is used to replace part of silica or all calcium carbonate is used as the coating pigment. There are no clear requirements for the shape and particle size distribution of calcium carbonate.
  • the ink-absorbing coating obtained by using conventional calcium carbonate products can only meet the low-speed printing mode of ordinary printers. Under the high-speed printing mode of industrial digital printers, it is not optimized. Coating structure, there will be problems such as lack of vivid color or color cast.
  • the present invention has the following advantages and effects:
  • the present invention provides a method for preparing coated cardboard suitable for high-speed printing.
  • a porous functional coating as the surface layer of the coated cardboard
  • the prepared coated cardboard meets the requirements of industrial digital printers.
  • High-speed printing mode needs, with good ink absorption and color rendering ability, after printing, you can get prints with full color and high definition.
  • the preparation method provided by the present invention selects calcium carbonate as the coating pigment, and innovatively proposes relevant requirements for the shape and particle size distribution of calcium carbonate, so that the prepared coated cardboard can not only meet the low-speed printing mode of ordinary printers It can also be used in the high-speed printing mode of industrial digital printers; the optimized coating structure will not cause problems such as unbright color or color cast.
  • the preparation method provided by the present invention is different from the existing technical solution using silica.
  • Calcium carbonate is selected as the coating pigment, which reduces the production cost and has certain significance for industrial production.
  • Fig. 1 is a schematic diagram of the distribution state of the dots in the field density of Comparative Example 1 and Examples 1-3;
  • Figure 2 is a schematic diagram of the dot distribution state of Comparative Example 2 and Comparative Example 3 under the field density;
  • Fig. 3 is a schematic diagram of the dot distribution state of Comparative Example 4 under the solid density.
  • the present invention provides a coated cardboard suitable for high-speed printing and a preparation method thereof, which is used to solve the imbalance of the penetration and diffusion of ink and coating in the prior art in the high-speed printing mode of industrial digital printers defect.
  • weight (mass) parts used in the following examples and comparative examples may be 1 kg, or any other amount commonly used in the art.
  • Patent name An inkjet printing paper (patent number: 200510048121.4), the first embodiment of the patent.
  • the patent is coated with a layer of water-based inkjet paint on one side of the paper base.
  • the components and weight parts of the paint are:
  • the water-based inkjet coating obtained above was used as the top coating coating for coated cardboard, dried after coating, and calendered to obtain inkjet printing paper.
  • the coating amount of the top coating was 6g/m 2 , the base paper,
  • the primer coating, core coating, drying and calendering parameters are the same as in Comparative Example 4 of the present invention.
  • Patent name New color inkjet printing paper coating formula (patent number: 201510398838.5), the scheme of Example 1 of the patent.
  • parts by mass it includes the following components: 20 parts of nano-silica, 75 parts of deionized water, 8 parts of modified bentonite, 3 parts of acrylic emulsion, 3.6 parts of modified alumina, 13 parts of carboxymethyl cellulose, poly 5.2 parts of vinyl alcohol, 1.8 parts of boric acid, 5 parts of polydimethylpropylammonium chloride.
  • the above components are divided into coatings, the obtained coatings are used as top coatings for coated cardboard, and then dried and calendered after coating to obtain inkjet printing paper.
  • the base paper, base coating, core coating, drying and The calendering parameters were the same as those of Comparative Example 4, the coating amount of the top coating was 6 g/m 2 , and the base paper, base coating, core coating, drying and calendering parameters were the same as those of Comparative Example 4 of the present invention.
  • Patent name A matt color inkjet printing paper coating and its preparation method (Patent No.: 200810242828.2) The scheme of Example 1 of the patent.
  • the coating obtained above was used as the top coating coating for coated cardboard, dried after coating, and calendered to obtain inkjet printing paper.
  • the coating amount of the top coating was 6g/m 2
  • the base paper and the base coating Core coating, drying and calendering parameters are the same as Comparative Example 4 of the present invention.
  • Base coat paint 75 parts of calcium carbonate, 25 parts of kaolin, 12 parts of styrene-butadiene latex, 3 parts of coated starch, and 61.9 parts of water are used to prepare base coat paint with a solid content of 65%; core coat paint : Mix 60 parts of calcium carbonate, 40 parts of kaolin, 20 parts of styrene-butadiene latex, and 64.6 parts of water into core coating paint, with a solid content of 65%; top coat paint: 100 parts of calcium carbonate (the shape of calcium carbonate is spindle, The average particle size is 1.0um), 8 parts of polyvinyl alcohol, 3 parts of polyvinylamine, 0.075 parts of mineral oil defoamer, and 111 parts of water to make a top coat paint with a solid content of 50%.
  • core coat paint Mix 60 parts of calcium carbonate, 40 parts of kaolin, 20 parts of styrene-butadiene latex, and 64.6 parts of water into core coating paint, with a
  • the primer coating method is knife coating, and the primer coating amount 15g/m 2 , and the drying temperature is 160°C;
  • the top coat coating method is knife coating, the top coat coating amount is 6g/m 2 , The drying temperature is 120°C;
  • Base coat paint mix 50 parts of calcium carbonate, 50 parts of kaolin, 10 parts of polyvinyl acetate latex, and 110 parts of water into base coat paint, the solid content of the base coat paint is 50%; core coat paint :20 parts of calcium carbonate, 80 parts of kaolin, 15 parts of styrene-acrylic latex, 54.1 parts of water are formulated into core coating paint, the solid content of core coating paint is 68%; top coat paint: 90 parts of calcium carbonate (calcium carbonate is Spherical particles, in terms of mass percentage, the particle size of 0-0.4um accounts for 5-8%, the particle size of 0.4-1um accounts for 75-85%, the particle size of 1um-2um accounts for 10-25%), polyvinyl alcohol 4 parts, 1 part of modified starch, 5 parts of poly(dimethylaminoethyl acrylate) quaternary ammonium chloride, 0.025 parts of polyether defoamer, and 66.7 parts of water are formulated into top coat paint with a solid content
  • the primer coating method is knife coating, and the primer coating amount It is 7g/m 2 , and the drying temperature is 70°C;
  • the core coating method is curtain coating, and the coating amount of the core coating layer is 15g/m 2.
  • the drying temperature is 160°C;
  • the top coat coating method is knife coating, and the top coat coating amount is 12g/m 2 , The drying temperature is 160°C;
  • Base coat paint make 75 parts of calcium carbonate, 25 parts of kaolin, 12 parts of styrene-butadiene latex, 3 parts of coated starch, and 61.9 parts of water to prepare base coat paint, the solid content of base coat paint is 65%;
  • Core coating paint 60 parts of calcium carbonate, 40 parts of kaolin, 20 parts of styrene-butadiene latex, and 64.6 parts of water are used to prepare the core coating paint with a solid content of 65%;
  • top coat paint 100 calcium carbonate (Calcium carbonate is spherical particles, in terms of mass percentage, the particle size 0-0.4um accounts for 5-8%, the particle size 0.4-1um accounts for 75-85%, and the particle size 1um-2um accounts for 10-25% ), 8 parts of polyvinyl alcohol, 3 parts of polyvinylamine, 0.075 parts of mineral oil defoamer, and 111 parts of water are formulated into top coat paint with a solid content of 50%.
  • the primer coating method is knife coating, and the primer coating amount 15g/m 2 , and the drying temperature is 160°C;
  • the top coat coating method is knife coating, the top coat coating amount is 6g/m 2 , The drying temperature is 120°C;
  • Base coat paint 100 parts of calcium carbonate, 20 parts of styrene-butadiene latex, and 56.5 parts of water are formulated into base coat paint, the solid content of the base coat paint is 68%; core coat paint: 50 parts calcium carbonate , 50 parts of kaolin, 10 parts of polyvinyl acetate latex, and 110 parts of water are used to prepare the core coating paint, the solid content of the core coating paint is 50%; the top coat paint: 110 parts of calcium carbonate (calcium carbonate is spherical particles, In terms of mass percentage, the particle size 0-0.4um accounts for 5-8%, the particle size 0.4-1um accounts for 75-85%, and the particle size 1um-2um accounts for 10-25%), 9 parts of polyvinyl alcohol, 1 part of carboxymethyl cellulose, 2 parts of water-based polyurethane, 0.1 part of organic silicon defoamer, and 183.1 parts of water are formulated into a top coat paint, and the solid content of the top coat paint is 40%.
  • the core coating method is bar coating, and the coating amount of the core coating layer is 6g/m 2.
  • the drying temperature is 80°C;
  • the top coat coating method is knife coating, and the top coat coating amount is 4g/m 2 , The drying temperature is 70°C;
  • the inkjet printing papers prepared in Comparative Examples 1-4 and Examples 1-3 were printed using an industrial digital high-speed printer (printer model: Handway Glory1604, production company: Shenzhen Hanhua Industrial Digital Equipment Co., Ltd.) at a printing speed of 100m/min, Resolution 600*600dpi, 12PL mode, after printing, evaluate the apparent, solid density and chromaticity of the sample (test instrument: Spectrodensitometer X-rite 500, American X-Rite, standard light source D50/field of view 2° ) As shown in the following table (Table 1 and Table 2), Table 1 is the sample field density data table; Table 2 is the sample chromaticity data table.
  • Comparative Example 1 The dot distribution state under the solid density of Comparative Example 1 is shown in Figure 1.
  • the ink dot state is normal.
  • Comparative Example 1 uses flake precipitated calcium carbonate instead of silica. Due to the low specific surface area of calcium carbonate and low oil absorption, the coating is formed The penetration effect of the layer on the ink is weakened.
  • Comparative Example 4 uses spindle-shaped calcium carbonate. The rest of the raw materials are the same as in Example 2. After coating and printing, the pattern appears hue unsaturation. This is due to the spindle shape. The pores of the ink-absorbing coating constructed by calcium carbonate are uneven, and the absorption rate of the ink in different areas of the coating is different, which leads to unsaturation of some dots. At the same time, the cyan (C) and magenta (M) chromaticity L values are high , The field density is low, and the pattern color is light and not full.
  • Example 1-3 uses spherical calcium carbonate to construct a porous coating structure, which balances the ink while being affected by the high-speed movement of the paper. Due to the uniformity of the pores, different pigments are adsorbed and fixed in a balanced manner, and the colors obtained are full and bright. Therefore, the technical scheme of the present invention is suitable for the high-speed printing mode of industrial digital printers, and has obvious advantages compared with the prior art.

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Abstract

一种适用于高速喷墨打印的涂布卡纸及其制备方法；所述涂布卡纸包括原纸层和涂布层，所述涂布层包括底涂层、芯涂层和面涂层；所述制备方法包括如下步骤：在原纸层表面涂布涂料形成涂布层，干燥、压光后得到所述涂布卡纸；该制备方法通过构建多孔性功能涂层作为涂布卡纸的面涂层，满足工业数码打印机的高速打印模式要求，打印后得到颜色饱满，清晰度高的印刷品；采用不同粒径级配的球形碳酸钙作为涂层颜料，使制备的卡纸不仅能满足普通打印机的低速打印模式的要求，而且不会出现色彩不鲜艳或偏色等问题，能在高速打印模式下使用。

Description

一种适用于高速打印的涂布卡纸及其制备方法 技术领域
本发明属于造纸、印刷包装技术领域，尤其涉及一种适用于高速打印的涂布卡纸及其制备方法。
背景技术
随着社会经济和科技的快速发展，数字印刷技术的不断进步，数码印刷已经成为了包装印刷领域的重要组成部分，追求个性化的文化潮流、有针对性印刷品的需求，给数码印刷提供了广泛的发展空间。
数码打印机的发展也对喷墨打印纸张提出了新的要求，汉弘集团成功研发了一款工业数码打印机，用于瓦楞纸板的数码打印，首次使用配备京瓷喷头的Single Pass技术，使得纸箱数码印刷从传统的扫描式印刷过渡到工业级的快速生产，打印速度最高达150m/分钟，喷印精度600x 1800dpi，该高速打印方式对喷墨打印纸张提出了新的要求和挑战，现有喷墨打印纸张在该高速打印模式下打印后，由于墨水向纸张涂层渗透、扩散、固着性能的不均衡，导致图案出现较多条痕状的露白，图案打印不完整，实地密度低，颜色不饱满或产生偏色，无法达到精美印刷的效果。
产生这一问题的原因在于该工业数码打印机的打印模式(Single Pass)有别于现有喷墨打印机，现有喷墨打印机多为扫描式打印，喷头为横向扫描式运动，纸张为纵向运动，两者运动的方向垂直，同时由于扫描式打印速度较慢，墨水与纸张涂层接触时产生的相对速度差较小，墨水与纸张涂层的相互作用满足墨水渗透、扩散的平衡，因此得到打印密度高、颜色饱满的图案；工业数码打印机Single Pass打印模式，墨头位置固定不动，纸张以高速通过墨头下端，墨头通过压电方式喷出墨水到纸张表面，此时墨水与纸张之间具有较大的速度差，墨水接触纸张时由于速度差带来墨滴的形变，同时也对墨水与纸张的渗透和扩散作用产生了影响，破坏了墨水渗透、扩散的平衡，因此得到的纸张表现为出现较多条痕状的露白等问题，打印效果差。
因此，研发出一种适用于高速打印的涂布卡纸及其制备方法，用于解决现有技术中，存在着墨水与涂层的渗透和扩散作用在工业数码打印机高速打印模式下失衡的技术缺陷，成了本领域亟待解决的问题。
发明概述
技术问题
问题的解决方案
技术解决方案
为了克服现有技术的不足，本发明提供一种适用于高速打印的涂布卡纸及其制备方法。
本发明的目的通过如下技术方案实现。
本发明提供的一种适用于高速打印的涂布卡纸及其制备方法，用于解决现有技术中存在的技术缺陷，制备出适用于高速打印的涂布卡纸。本发明设计及构建了一个多孔性涂层，通过涂层结构的优化及不同尺度颜料的应用，使得墨水与纸张存在较大速度差的条件下，仍然能达到墨水与涂层的渗透、扩散的平衡。所述多孔性涂层由不同粒径大小的球形碳酸钙颗粒组成，配合胶黏剂、阳离子固色剂的作用，构成涂布卡纸的功能涂层，适用于工业数码打印机的高速打印模式(50-150m/min)。
本发明提供的一种适用于高速打印(50-150m/min)的涂布卡纸，包括原纸层和涂布层；所述原纸层的定量为100-280g/m 2；所述涂布层包括底涂层、芯涂层以及面涂层。
进一步地，按重量份计，所述底涂层的原料包括如下物质：
碳酸钙50-100份；
高岭土0-50份；
胶黏剂10-20份。
进一步地，按重量份计，所述芯涂层的原料包括如下物质：
碳酸钙20-60份；
高岭土40-80份；
胶黏剂10-20份。
进一步地，按重量份计，所述面涂层为功能涂层，面涂层的原料包括如下物质：
碳酸钙90-110份；
胶黏剂5-10份；
阳离子固色剂2-5份；
消泡剂0.025-0.1份。
进一步地，底涂层及芯涂层的原料中所述胶黏剂为聚醋酸乙烯酯胶乳、丁苯胶乳、苯丙胶乳或涂布淀粉中的一种以上。
进一步地，面涂层原料中所述的胶黏剂为聚乙烯醇、改性淀粉、羧甲基纤维素中的一种以上；面涂层原料中所述的阳离子固色剂为季多铵盐、阳离子聚胺或水性聚氨酯中的一种以上；面涂层原料中所述的消泡剂为矿物油消泡剂、有机硅消泡剂或聚醚消泡剂中的一种以上。
进一步地，所述季多铵盐包括聚丙烯酸二甲胺乙酯氯化季铵盐、聚二甲基二烯丙基氯化铵；所述阳离子聚胺包括聚乙烯胺和聚乙烯亚胺。
进一步地，面涂层原料中所述的碳酸钙为球形颗粒，按质量百分比计，碳酸钙的颗粒级配为粒径0-0.4um占比5-8％，粒径0.4-1um占比75-85％，粒径1um-2um占比10-25％。
本发明提供的一种制备上述的适用于高速打印的涂布卡纸的方法，包括如下步骤：
(1)分别称取底涂层、芯涂层以及面涂层的原料，分别混合均匀形成底涂层涂料、芯涂层涂料以及面涂层涂料；
(2)在定量为100-280g/m 2的原纸层表面(正面)涂布底涂层的涂料，干燥后形成底涂层；
(3)在底涂层的表面涂布芯涂层的涂料，干燥后形成芯涂层；
(4)在芯涂层的表面涂布面涂层的涂料，干燥后形成面涂层；
(5)压光后得到所述适用于高速打印的涂布卡纸。
进一步地，步骤(1)所述底涂层涂料的固含量为50-68％；步骤(1)所述芯涂层涂料的固含量为50-68％；步骤(1)所述面涂层涂料的固含量为40-60％。
进一步地，步骤(2)、步骤(3)以及步骤(4)所述涂布的方式包括刮刀涂布、刮棒涂布以及帘式涂布；步骤(2)、步骤(3)以及步骤(4)所述干燥的温度均为70-160℃。
进一步地，步骤(5)中所述压光的温度为60-230℃，步骤(5)中所述压光的压力为10-60kN/m；步骤(2)所述底涂层的涂布量为7-15g/m 2；步骤(3)所述芯涂层涂布量为6-15g/m 2；步骤(4)所述面涂层的涂布量为4-12g/m 2。
本发明技术方案有别于现有使用二氧化硅的技术方案，使用二氧化硅的技术方案多利用二氧化硅的小粒径、高比表面积、高吸油值获得吸墨涂层，对墨水的渗透吸收作用较强，扩散作用较弱，该涂层适合低速打印模式；另外部分技术方案，为了降低涂层成本，选用碳酸钙替代部分二氧化硅或全部使用碳酸钙作为涂层的颜料，但对碳酸钙的形状及粒径分布没有提出明确要求，使用常规的碳酸钙产品得到的吸墨涂层也仅能满足普通打印机的低速打印模式，在工业数码打印机的高速打印模式下，未优化的涂层结构，会出现色彩不鲜艳或偏色等问题。
发明的有益效果
有益效果
与现有技术相比，本发明具有如下优点和效果：
(1)本发明提供了一种适用于高速打印的涂布卡纸的制备方法，通过构建多孔性功能涂层作为涂布卡纸的面层，使制备的涂布卡纸满足工业数码打印机的高速打印模式需求，具有良好的油墨吸收和显色能力，打印后可得到颜色饱满，清晰度高的印刷品。
(2)本发明提供的制备方法选用了碳酸钙作为涂层颜料，对碳酸钙的形状以及粒径分布创新地提出相关要求，使得制备出来的涂布卡纸不仅能满足普通打印机的低速打印模式的要求，也能在工业数码打印机的高速打印模式下使用；优化后的涂层结构，不会出现色彩不鲜艳或偏色等问题。
(3)本发明提供的制备方法有别于现有使用二氧化硅的技术方案，选用了碳酸钙作为涂层颜料，降低了生产成本，对应用于工业化生产有一定的意义。
对附图的简要说明
附图说明
图1为对比例1、实施例1-3实地密度下网点分布状态示意图；
图2为对比例2、对比例3实地密度下网点分布状态示意图；
图3为对比例4实地密度下网点分布状态示意图。
发明实施例
本发明的实施方式
需指出的是，以下若有未特别详细说明之过程或参数，均是本领域技术人员可参照现有技术理解或实现的。
本发明提供了一种适用于高速打印的涂布卡纸及其制备方法，用于解决现有技术中，存在着墨水与涂层的渗透和扩散作用在工业数码打印机高速打印模式下失衡的技术缺陷。
下面将对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。为了更详细说明本发明的优势，下面结合现有公开技术方案的实施例与本发明对比，进行具体地描述。
以下实施例及对比例所用到的重量(质量)份数，作为举例，一份可以为1kg，也可以是本领域常用的任意其他用量。
对比例1
专利名称：一种喷墨打印纸(专利号：200510048121.4)，该专利的实施例1方案。
该专利在纸基的一面涂有一层水性喷墨涂料，该涂料的组分及其重量份数为：
Figure PCTCN2019114540-appb-000001
将5份的PVA125溶解到45份水中，得到10％的PVA水溶液；取100份25％(W) 的JetCoat与上述PVA水溶液混合，然后加入1份的RETAMINOL KT、1份的碳酸锆铵和剩余的442份水，搅拌均匀，得到固含量18％，粘度0.01PaS的水性喷墨涂料。
将以上得到的水性喷墨涂料作为涂布卡纸的面涂涂料，涂布后干燥，压光，得到喷墨打印纸，所述面涂层涂布量为6g/m 2，所述原纸、底涂层、芯涂层、干燥及压光参数与本发明的对比例4相同。
对比例2
专利名称：新型彩色喷墨打印纸涂层配方(专利号：201510398838.5)，该专利的实施例1方案。
按照质量份数计包括以下组分：纳米二氧化硅20份，去离子水75份，改性膨润土8份，丙烯酸乳液3份，改性氧化铝3.6份，羧甲基纤维素13份，聚乙烯醇5.2份，硼酸1.8份，聚二甲基丙基氯化铵5份。
将以上组分配制成涂料，将得到的涂料作为涂布卡纸的面涂涂料，涂布后干燥，压光，得到喷墨打印纸，所述原纸、底涂层、芯涂层、干燥及压光参数与对比例4相同，所述面涂层涂布量为6g/m 2，所述原纸、底涂层、芯涂层、干燥及压光参数与本发明的对比例4相同。
对比例3
专利名称：一种无光泽彩色喷墨打印纸涂料及其制备方法(专利号：200810242828.2)该专利的实施例1方案。
1、在室温下将聚丙烯酸钠0.05份添加到去离子水85份中溶解；在溶解好的去离子水中加入改性膨润土2.3份，室温下分散；采用GFJ-04型高速分散机，分散转速：3500r/min；分散时间：45min；改性膨润土分散液质量百分浓度：3％；2、在改性膨润土分散液中加入二氧化硅9.0份分散，制得改性膨润土和二氧化硅混合分散液；分散转速：3000r/min；分散时间：30min，混合分散液质量百分浓度12％；3、在搅拌的条件下，改性膨润土和二氧化硅混合分散混合液中加入聚乙烯醇(1788)3.4份，再依次加入硅酮消泡剂0.006份、聚二甲基二烯丙基氯化铵0.2份及羧甲基纤维素0.1份，经混合搅拌均匀制得涂料液；搅拌转速：2500r/min；搅拌时间20min。
将以上得到的涂料作为涂布卡纸的面涂涂料，涂布后干燥，压光，得到喷墨打印纸，所述面涂层涂布量为6g/m 2，所述原纸、底涂层、芯涂层、干燥及压光参数与本发明的对比例4相同。
对比例4
(1)底涂层涂料：将碳酸钙75份，高岭土25份，丁苯胶乳12份，涂布淀粉3份，水61.9份配制成底涂层涂料，固含量为65％；芯涂层涂料：将碳酸钙60份，高岭土40份，丁苯胶乳20份，水64.6份配制成芯涂层涂料，固含量65％；面涂层涂料：将碳酸钙100份(碳酸钙形状为纺锤状，平均粒径1.0um)，聚乙烯醇8份，聚乙烯胺3份，矿物油消泡剂0.075份，水111份配制成面涂层涂料，固含量50％。
(2)在定量为150g/m 2原纸层表面(正面)涂布底涂涂料，干燥后形成底涂层，所述底涂层涂布方式为刮刀涂布，所述底涂层涂布量为15g/m 2，所述干燥温度为160℃；
(3)在底涂层的表面涂布芯涂层的涂料，干燥后形成芯涂层，所述芯涂层涂布方式为刮棒涂布，所述芯涂层涂布量为8g/m 2，所述干燥温度为70℃；
(4)在芯涂层的表面涂布面涂层的涂料，干燥后形成面涂层，所述面涂涂布方式为刮刀涂布，所述面涂层涂布量为6g/m 2，所述干燥温度为120℃；
(5)对涂布后的纸样压光，得到喷墨打印纸，所述压光温度为150℃，压力为50kN/m。
实施例1
(1)底涂层涂料：将碳酸钙50份，高岭土50份，聚醋酸乙烯酯胶乳10份，水110份配制成底涂层涂料，底涂层涂料固含量为50％；芯涂层涂料：碳酸钙20份，高岭土80份，苯丙胶乳15份，水54.1份配制成芯涂层涂料，芯涂层涂料固含量为68％；面涂层涂料：将碳酸钙90份(碳酸钙为球形颗粒，按质量百分比计，粒径0-0.4um占比为5-8％，粒径0.4-1um占比75-85％，粒径1um-2um占比10-25％)，聚乙烯醇4份，改性淀粉1份，聚丙烯酸二甲胺乙酯氯化季铵盐5份，聚醚消泡剂0.025份，水66.7份配制成面涂层涂料，面涂层涂料固含量为60％。
(2)在定量为280g/m 2原纸层表面(正面)涂布底涂涂料，干燥后形成底涂 层，所述底涂层涂布方式为刮刀涂布，所述底涂层涂布量为7g/m 2，所述干燥温度为70℃；
(3)在底涂层的表面涂布芯涂层的涂料，干燥后形成芯涂层，所述芯涂层涂布方式为帘式涂布，所述芯涂层涂布量为15g/m 2，所述干燥温度为160℃；
(4)在芯涂层的表面涂布面涂层的涂料，干燥后形成面涂层，所述面涂涂布方式为刮刀涂布，所述面涂层涂布量为12g/m 2，所述干燥温度为160℃；
(5)对涂布后的纸样压光，得到喷墨打印纸，所述压光温度为230℃，压力为10kN/m。
实施例2
(1)底涂层涂料：将碳酸钙75份，高岭土25份，丁苯胶乳12份，涂布淀粉3份，水61.9份配制成底涂层涂料，底涂层涂料固含量为65％；芯涂层涂料：将碳酸钙60份，高岭土40份，丁苯胶乳20份，水64.6份配制成芯涂层涂料，芯涂层涂料固含量为65％；面涂层涂料：将碳酸钙100份(碳酸钙为球形颗粒，按质量百分比计，粒径0-0.4um占比为5-8％，粒径0.4-1um占比75-85％，粒径1um-2um占比10-25％)，聚乙烯醇8份，聚乙烯胺3份，矿物油消泡剂0.075份，水111份配制成面涂层涂料，面涂层涂料固含量为50％。
(2)在定量为150g/m 2原纸层表面(正面)涂布底涂涂料，干燥后形成底涂层，所述底涂层涂布方式为刮刀涂布，所述底涂层涂布量为15g/m 2，所述干燥温度为160℃；
(3)在底涂层的表面涂布芯涂层的涂料，干燥后形成芯涂层，所述芯涂层涂布方式为刮棒涂布，所述芯涂层涂布量为8g/m 2，所述干燥温度为70℃；
(4)在芯涂层的表面涂布面涂层的涂料，干燥后形成面涂层，所述面涂涂布方式为刮刀涂布，所述面涂层涂布量为6g/m 2，所述干燥温度为120℃；
(5)对涂布后的纸样压光，得到喷墨打印纸，所述压光温度为150℃，压力为50kN/m。
实施例3
(1)底涂层涂料：将碳酸钙100份，丁苯胶乳20份，水56.5份配制成底涂层涂料，底涂层涂料固含量为68％；芯涂层涂料：将碳酸钙50份，高岭土50份，聚醋 酸乙烯酯胶乳10份，水110份配制成芯涂层涂料，芯涂层涂料固含量为50％；面涂层涂料：将碳酸钙110份(碳酸钙为球形颗粒，按质量百分比计，粒径0-0.4um占比为5-8％，粒径0.4-1um占比75-85％，粒径1um-2um占比10-25％)，聚乙烯醇9份，羧甲基纤维素1份，水性聚氨酯2份，有机硅消泡剂0.1份，水183.1份配制成面涂层涂料，面涂层涂料固含量为40％。
(2)在定量为100g/m 2原纸层表面(正面)涂布底涂涂料，干燥后形成底涂层，所述底涂层涂布方式为刮刀涂布，所述底涂层涂布量为10g/m 2，所述干燥温度为120℃；
(3)在底涂层的表面涂布芯涂层的涂料，干燥后形成芯涂层，所述芯涂层涂布方式为刮棒涂布，所述芯涂层涂布量为6g/m 2，所述干燥温度为80℃；
(4)在芯涂层的表面涂布面涂层的涂料，干燥后形成面涂层，所述面涂涂布方式为刮刀涂布，所述面涂层涂布量为4g/m 2，所述干燥温度为70℃；
(5)对涂布后的纸样压光，得到喷墨打印纸，所述压光温度为60℃，压力为60kN/m。
测试评价：
将对比例1-4，实施例1-3制备的喷墨打印纸使用工业数码高速打印机(打印机型号：Handway Glory1604，生产公司：深圳汉华工业数码设备有限公司)打印，打印速度100m/min，分辨率600*600dpi，12PL模式，打印后对样品的表观、实地密度及色度进行评价(测试仪器：分光密度计X-rite 500，美国爱色丽公司，标准光源D50/视场2°)如下表(表1与表2)所示，表1为样品实地密度数据表；表2为样品色度数据表。
表1
[Table 1]
Figure PCTCN2019114540-appb-000002
表2
Figure PCTCN2019114540-appb-000003
对实施例1-3，对比例1-4制备的喷墨打印纸打印效果进行观察，对比例2、对比例3实地密度下网点分布状态如图2所示，墨点变形严重，产生该现象的原因是对比例2、对比例3采用二氧化硅体系涂层，由于该类涂层对墨水的吸附作用较强，墨滴接触纸面时受到纸张高速移动的影响导致变形，在接触纸张后马上被纸面的涂层吸附，没有足够的扩散时间，导致干燥后墨点保留了变形的状态，形成的图案出现条痕状露白现象。
对比例1实地密度下网点分布状态如图1所示，墨点状态正常，对比例1采用片状沉淀碳酸钙替代二氧化硅，由于碳酸钙的比表面积低，吸油值低，所构成的 涂层对墨水的渗透作用减弱，在受到纸张高速移动的影响的同时，均衡了墨水的扩散和渗透作用，因此图像不会出现条痕状露白，但由于片状碳酸钙形成的涂层结构孔隙分布不均，对不同色料的吸附固着不均衡，造成色调偏暗，表现为青色(C)、品红色(M)实地密度偏高、色度L值偏低，黄色(Y)、黑色(K)实地密度偏低，色度L值偏高，图案色彩暗淡不鲜艳。
对比例4实地密度下网点分布状态如图3所示，对比例4采用纺锤形的碳酸钙，其余原料与实施例2相同，涂布后打印，图案出现色相不饱和现象，这是由于纺锤形碳酸钙构建成的吸墨涂层孔隙不均匀，涂层的不同区域对墨水的吸收速率存在差异，导致部分网点不饱和，同时，青色(C)、品红色(M)色度L值偏高、实地密度偏低，图案颜色浅淡、不饱满。
实施例1-3实地密度下网点分布状态如附图1所示，实施例1-3以球形碳酸钙构建了一种多孔性的涂层结构，在受到纸张高速移动的影响的同时，均衡墨水的扩散、渗透作用，同时由于孔隙的均匀性，对不同色料吸附固着均衡，得到的图案色彩饱满、鲜艳。因此本发明技术方案适用于工业数码打印机高速打印模式，与现有技术相比具有明显的优势。
以上实施例仅为本发明较优的实施方式，仅用于解释本发明，而非限制本发明，本领域技术人员在未脱离本发明精神实质下所作的改变、替换、修饰等均应属于本发明的保护范围。

Claims (10)

  1. 一种适用于高速打印的涂布卡纸，其特征在于，包括原纸层和涂布层；所述原纸层的定量为100-280g/m 2；所述涂布层包括底涂层、芯涂层以及面涂层。
  2. 根据权利要求1所述的一种适用于高速打印的涂布卡纸，其特征在于，按重量份计，所述底涂层的原料包括如下物质：
    碳酸钙50-100份；
    高岭土0-50份；
    胶黏剂10-20份。
  3. 根据权利要求1所述的一种适用于高速打印的涂布卡纸，其特征在于，按重量份计，所述芯涂层的原料包括如下物质：
    碳酸钙20-60份；
    高岭土40-80份；
    胶黏剂10-20份。
  4. 根据权利要求1所述的一种适用于高速打印的涂布卡纸，其特征在于，按重量份计，所述面涂层为功能涂层，面涂层的原料包括如下物质：
    碳酸钙90-110份；
    胶黏剂5-10份；
    阳离子固色剂2-5份；
    消泡剂0.025-0.1份。
  5. 根据权利要求2、权利要求3所述的一种适用于高速打印的涂布卡纸，其特征在于，底涂层及芯涂层的原料中所述胶黏剂为聚醋酸乙烯酯胶乳、丁苯胶乳、苯丙胶乳或涂布淀粉中的一种以上。
  6. 根据权利要求4所述的一种适用于高速打印的涂布卡纸，其特征在于，面涂层原料中所述的胶黏剂为聚乙烯醇、改性淀粉、羧甲基纤维素中的一种以上；面涂层原料中所述的阳离子固色剂为季多铵盐、阳离子聚胺或水性聚氨酯中的一种以上；面涂层原料中所述的消泡剂为矿物油消泡剂、有机硅消泡剂或聚醚消泡剂中的一种以上；所述季多铵盐包括聚丙烯酸二甲胺乙酯氯化季铵盐、聚二甲基二烯丙基氯化铵；所述阳离子聚胺包括聚乙烯胺和聚乙烯 亚胺；面涂层原料中所述的碳酸钙为球形颗粒，按质量百分比计，碳酸钙的颗粒级配为粒径0-0.4um占比5-8％，粒径0.4-1um占比75-85％，粒径1um-2um占比10-25％。
  7. 一种制备权利要求1-6任一项所述的适用于高速打印的涂布卡纸的方法，其特征在于，包括如下步骤：
    (1)分别称取底涂层、芯涂层以及面涂层的原料，分别混合均匀形成底涂层涂料、芯涂层涂料以及面涂层涂料；
    (2)在原纸层正面涂布底涂层涂料，干燥后形成底涂层；
    (3)在底涂层的表面涂布芯涂层的涂料，干燥后形成芯涂层；
    (4)在芯涂层的表面涂布面涂层的涂料，干燥后形成面涂层；
    (5)压光后得到所述适用于高速打印的涂布卡纸。
  8. 根据权利要求7所述的制备方法，其特征在于，步骤(1)所述底涂层涂料的固含量为50-68％；步骤(1)所述芯涂层涂料的固含量为50-68％；步骤(1)所述面涂层涂料的固含量为40-60％。
  9. 根据权利要求8所述的制备方法，其特征在于，步骤(2)、步骤(3)以及步骤(4)所述涂布的方式包括刮刀涂布、刮棒涂布以及帘式涂布；步骤(2)、步骤(3)以及步骤(4)所述干燥的温度均为70-160℃。
  10. 根据权利要求8所述的制备方法，其特征在于，步骤(5)中所述压光的温度为60-230℃，步骤(5)中所述压光的压力为10-60kN/m；步骤(2)所述底涂层的涂布量为7-15g/m 2；步骤(3)所述芯涂层涂布量为6-15g/m 2；步骤(4)所述面涂层的涂布量为4-12g/m 2。
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