42 results about "Chemical pulp" patented technology

The invention discloses environment-friendly high-barrier packaging paper and a preparation method thereof, and belongs to the technical field of paper product manufacturing. The method comprises the following steps: dispersing bleached sulfate softwood pulp in an aqueous solution of TEMPO and NaBr, adding a NaClO solution, adjusting the pH value, carrying out a reaction, washing the product obtained by the reaction, and carrying out high-pressure homogenization to obtain TEMPO oxidized nanocellulose (TOCNF); mixing the bleached sulfate softwood chemical pulp, hardwood pulp and viscose fibers, pulping, papermaking and the like to obtain original paper; then, TOCNF and waterborne epoxy modified acrylic emulsion are mixed, and a mixed coating is prepared; and finally, coating the surface of original paper with the coating according to a certain mass ratio, and carrying out hot-pressing curing to obtain the environment-friendly high-barrier packaging paper. The packaging paper is excellent in mechanical property, high in barrier property, good in surface uniformity and printing property, environment-friendly and degradable in raw materials, simple to prepare and low in cost.

The invention discloses a method for preparing high-quality dissolving pulp from low-grade plant fiber raw materials, and belongs to the technical field of biomass pulping. The preparation method comprises the following steps: screening a low-grade plant fiber raw material to obtain a fiber raw material of which the length is 20-30 mm, the width is 10-15 mm and the thickness is 3-5 mm; carrying out deep prehydrolysis-sulfate cooking treatment on the screened fiber raw materials to obtain unbleached sulfate pulp fibers; performing deep eutectic solvent and elemental chlorine-free bleaching treatment on the unbleached sulfate pulp fiber to obtain paper pulp fiber with low kappa number; and carrying out biological enzyme treatment on the paper pulp fibers with low kappa number to obtain the high-quality dissolving pulp. According to the method, the morphology and the structure of chemical pulp fibers are effectively regulated and controlled by designing deep eutectic solvent treatment, and deep dissolution of residual hemicelluloses and lignin is achieved; through biological enzyme treatment, the alpha-cellulose content and the Fock reaction performance are further improved, and finally the high-quality dissolving pulp is prepared.

The invention discloses an chemi-mechanical pulp production method capable of improving the filtration property of chemi-mechanical pulp, and relates to the technical field of papermaking, high-concentration grinding freeness is optimized to 640 + / -30ml, pulp fine fibers can be controlled at 22%-33%, the tensile index middle-lower limit and the bulk middle-upper limit, the high-concentration grinding effect is improved, the effect between fibers is facilitated, the effect between the fibers and a grinding sheet is reduced, and the filtration property of the chemi-mechanical pulp is improved. Fiber cutting is reduced, and the content of pulp fine fibers is reduced; the MSD torque is increased to 250 + / -10 KNM, the tearing effect of wood chips is improved, the preimpregnation reaction of the wood chips is facilitated, the original fine content is controlled to 26%-29% from original 22%-33%, the pulp bulk is increased by about 0.1 cm < 3 > / g, and the tensile index is increased by 1.0 N.m / g; the four low-concentration grinders are changed into parallel connection, so that the residence time of pulp in the low-concentration grinders is prolonged, the cutting effect of the pulp ground by the low-concentration grinders on fibers is reduced, light friction between grinding sheets and the fibers is increased, fibrillation of the fibers is facilitated, the bulk and the tensile strength are improved to a certain extent, and under the content of fine fibers, the size of the fibers is reduced. And the bulkiness and the tensile index of the finished pulp are also improved to a certain extent.

The present application relates to pulping technology field, the present application provides a kind of high-strength high-cleanliness chemical pulp's pulping process, with bamboo willow edge scrap as fiber raw material, after 1 stage pre-steaming, chip washing, dehydration, 2 stage pre-steaming;The wood chip material after 2 stage pre-steaming is 1 stage extrusion and is dissolved, 1 stage chemical liquid pre-impregnation, 2 stage extrusion and is dissolved, 2 stage chemical liquid pre-impregnation;1 stage chemical liquid pre-impregnation uses sodium hydroxide solution and does not use hydrogen peroxide, the chemical reagent of 2 stage chemical liquid pre-impregnation process is sodium hydroxide, hydrogen peroxide and sodium silicate;Material after 2 stage chemical liquid pre-impregnation is 1 stage refining, separation, cooling, 1 stage high-concentration bleaching, 1 stage dehydration, 2 stage high-concentration bleaching, 2 stage dehydration;Pulp after 2 stage dehydration is latent, refining etc., and the finished product is prepared.This application process can produce high-strength, high-cleanliness chemical pulp, and the pulp cost is lower, and the pulp quality is better, and it is beneficial to high-end cultural paper etc. application.

The invention discloses a preparation method of all-bamboo fiber basic color paper cup body paper and a product thereof, and the preparation method comprises the following steps: mechanically grinding bamboo chemical pulp fibers and bamboo chemical thermo-mechanical pulp fibers as raw materials, carrying out biological treatment on the bamboo chemical thermo-mechanical pulp fibers by using laccase / mediator, and preparing the paper cup body paper by adopting a three-layer composite papermaking process. The paper cup body paper is composed of a surface layer (bamboo chemical pulp), a core layer (bamboo chemical thermo-mechanical pulp treated by laccase / ABTS) and a bottom layer (bamboo chemical pulp), and aluminum sulfate, rosin size and CPAM are added in the papermaking process. The technical problems that the production cost is high due to the fact that traditional unbleached paper cup body paper depends on wood pulp, and bamboo pulp fibers are difficult to give consideration to high bulkness and high strength are solved, the raw material cost is low, the production process is environmentally friendly, the product has excellent physical strength, bulkness and water resistance, wood resource consumption can be reduced, and sustainable development of the papermaking industry is promoted.

1. The name of the design product: whiteness tester. 2. The use of the design product: for measuring the whiteness of paper and paperboard, pulp and chemical pulp, cotton and chemical fiber, textiles, plastics, ceramics, porcelain, starch, salt, white cement, porcelain clay, talc, calcium carbonate, nano calcium carbonate and other objects. 3. The design points of the design product: the combination of shape and pattern. 4. The picture or photo that best shows the design points: perspective view.

The useful solution refers to the technology for manufacturing waterproof and heat-resistant paper (brown paper) used in food processing, including the following steps: (i) Pulp pulverization; (ii) Pulp grinding; (iii) Mixing of chemical additives; (iv) Paper making; (v) Paper surface treatment; (vi) Paper drying. The resulting product possesses excellent oil and water resistance and stable heat resistance during food processing (baking, frying, steaming, etc.); while also ensuring food safety standards according to current regulations, minimizing the risk of unwanted substances leaching during use.

The invention discloses a preparation method of coated gift packaging paper. The preparation method comprises the following operation steps: S1, pulping: respectively pulping bleached sulfate softwood chemical pulp, bleached sulfate broadleaf wood chemical pulp and alkaline hydrogen peroxide bleached poplar chemimechanical pulp, and mixing to form mixed pulp; s2, auxiliary material adding, wet paper sheet forming and pre-drying; s3, coating and sizing are conducted, specifically, the front face and the back face of the paper sheet are coated with a coating respectively, and the coating comprises coating-grade light calcium carbonate, coating-grade talcum powder, a dispersing agent, sodium hydroxide, modified acrylic copolymer emulsion, polyvinyl acetate latex, coating starch, sodium carboxyl cellulose, a lubricating agent and a defoaming agent; s4, carrying out post-drying and carrying out super-soft calendering treatment by adopting eight rollers and seven pressing areas; the invention also provides the coated gift packaging paper prepared by adopting the preparation method, the smoothness of the coated gift packaging paper is greater than 1200s, the roughness of the coated gift packaging paper is less than 1.2 microns, and the coated gift packaging paper completely meets the requirements of the coated gift packaging paper for absorbing and drying gravure or flexographic printing water-based ink.

The invention provides carboxymethylated bamboo pulp reinforced composite paper and a preparation method thereof. The BCTMP is subjected to carboxymethylation modification by adopting an alkalization-etherification method, and compared with unmodified BCTMP, the prepared carboxymethylated bamboo wood chemithermomechanical pulp (CM-BCTMP) has the advantages that the fiber softness, the hydrophilicity and the inter-fiber binding capacity are remarkably improved. After the modified bamboo pulp and the unbleached sulfate wood pulp are mixed according to the proportion of 5: 5, the tensile index of finished paper is increased by 70% or above, the burst index is increased by 30% or above, the bottleneck problem that the paper strength is sharply reduced due to high-proportion bamboo pulp mixing is successfully solved, and a new way is provided for preparing a low-cost and high-strength paper-based material.

The application provides a white card paper and a base paper thereof, the base paper comprising: a surface layer, a core layer and a bottom layer which are sequentially stacked; wherein the pulp of the core layer comprises wood pulp, ground calcium carbonate and white mud light calcium carbonate; wherein the wood pulp comprises 50-95% by mass of mechanical pulp and 5-50% by mass of chemical pulp; the mass fraction of the ground calcium carbonate is 10-50%, and the mass fraction of the white mud light calcium carbonate is 10-50%. The base paper of the white card paper provided in the application can improve bulk, improve sizing efficiency, improve ash retention, reduce abrasion and has great market application value by mixing a certain amount of white mud light calcium carbonate which can be obtained at low cost into the pulp.

The invention discloses an chemi-mechanical pulp transfer screw press suitable for double bleaching towers, and relates to the technical field of chemi-mechanical pulp treatment equipment, a rotating shaft is arranged in the transfer screw press, the diameter of the rotating shaft is obliquely arranged from small to large from left to right, and a spiral stirring blade is fixed on the rotating shaft; the feeding mechanism is arranged on the upper left portion of the two transfer screw press bodies. The dehydration mechanism is connected with the two transfer screw press bodies; the pushing mechanism is connected with the squeezing pipe; the first mounting frame is arranged between the pushing mechanism and the squeezing pipe; the rapid switching of the feeding pipelines is realized, and the continuous dehydration operation of the chemi-mechanical pulp in the double-bleaching-tower system is ensured; online cleaning during blockage is facilitated, and the downtime is shortened; accumulated slurry is thoroughly removed, and residues are prevented from affecting the subsequent process; the two sets of independent transfer screw press bodies are arranged, flexible switching is achieved through the material distribution mechanism, it is ensured that the system can still operate continuously when a single machine is maintained or cleaned, and the overall operation continuity is improved.

The invention belongs to the technical field of papermaking, and discloses a manufacturing method of body paper suitable for rotary digital printing and bar code label paper. The manufacturing method comprises the following steps: by taking bleached sulfate needlebush chemical pulp and needlebush hot-ground chemimechanical pulp as fiber raw materials, mixing the bleached sulfate needlebush chemical pulp and the needlebush hot-ground chemimechanical pulp in a weight ratio of (20-40%): (60-80%) to form mixed pulp; the raw paper suitable for rotary digital printing is prepared through sizing, pulp screening, pulp flowing, net part dehydration forming, drying and specific surface coating; carboxymethyl cellulose salt with the substitution degree of 1-1.3 is added between the sizing step and the pulp screening step, and the dosage is 3-5 kg / t paper. The prepared paper product has an excellent ink fixing effect, is high in longitudinal and transverse tearability, has excellent printing processing performance, is relatively low in cost, and can be used as bar code label paper.

The invention discloses a wood nanocellulose hydrophobic oil-resistant agent as well as a preparation method and application thereof, and belongs to the technical field of oil-resistant agent preparation. According to the preparation method of the wood nanocellulose hydrophobic oil-resistant agent provided by the invention, a hydrogen bond acceptor, a Bronsted acid donor and a Lewis acid metal salt are adopted to construct a ternary eutectic solvent, a lignin network in chemi-mechanical pulp is cooperatively cracked, and a catalytic environment is provided; synchronously adding chemi-mechanical pulp and a bio-based modifier coumaric acid-phytosterol ester into the solvent, and integrally completing in-situ nanocrystallization dissociation and surface hydrophobic esterification functionalization of the fibers in an inert atmosphere; and carrying out shearing dispersion assisted by dihydrolevoglucosenone, centrifugal purification and reduced pressure distillation on the reaction mixture to obtain the wood nanocellulose hydrophobic oil-resistant agent. According to the method, synchronous construction of efficient nano dissociation and a modified catalytic environment of the chemi-mechanical pulp is achieved through the ternary eutectic solvent, a nano-crystallization-hydrophobic oil-resistant modification integrated process is achieved, toxic and harmful substances are avoided, and the method is green and environmentally friendly.

The application discloses a chemical pulp grinding steam recovery method and system. The chemical pulp grinding steam recovery system comprises a grinding steam conveying pipeline, a grinding steam ejector, a primary evaporation tank and a forced evaporation tank; the grinding steam ejector comprises a first input end connected with an output port, receives grinding steam to be recovered and pressurizes the grinding steam; the primary evaporation tank and the forced evaporation tank are connected with the output end of the grinding steam ejector through a steam header, and the pressurized grinding steam is input into the primary evaporation tank and the forced evaporation tank through the steam header to exchange heat and then condense. The design makes the grinding steam to be recovered not directly sent into the intermediate evaporation tank for heat exchange, but pressurized through the grinding steam ejector, enters the primary evaporation tank and the forced evaporation tank through the steam header for the first round of heat exchange, thereby avoiding the problems that the intermediate evaporation tank is seriously covered with fiber scale and the load of the grinding steam is limited.

The invention relates to a multi-ply containerboard for corrugated board, said multi-ply containerboard comprising a first outer ply, a second outer ply, and at least one intermediate ply sandwiched between the first and second outer ply, wherein the first and second outer ply comprise at least 70 wt-%, based on dry weight, of neutral sulphite semi-chemical (NSSC) pulp, and wherein the intermediate ply comprises at least 30 wt-%, based on dry weight, of unbleached kraft pulp and at least one cellulose-based strength enhancer, and wherein the intermediate ply comprises less than 30 wt-%, based on dry weight, of NSSC pulp.

The application discloses a preparation method of a paper suitable for intaglio printing and brush writing, and comprises the following steps: step (1), pulp preparation: bleached kraft softwood chemical pulp and bleached kraft hardwood chemical pulp are proportioned at a ratio of 5-10% and 90-95%; step (2), beating: the NBKP beating degree is controlled to be 38-48SR to provide good fiber bonding force and paper strength; the LBKP beating degree is controlled to be 25-35SR to provide excellent paper forming uniformity, smoothness and softness; step (3), sizing: carboxymethyl modified starch is added to the pulp before a paper machine pressure screen; step (4), pulp washing, sand and gas removal and sizing: step (5), fine screening, net section dewatering forming, pressing and pre-drying, to obtain raw paper: step (6), surface coating. The paper prepared by the method has excellent printing performance, excellent writing experience and excellent comprehensive quality, and the process is advanced.

The application provides a paper product, a paper pulp and a processing method thereof; the processing method comprises the following steps: multiple pulp washing; using a pulp squeezing machine to perform pulp beating, and conveying white water obtained by the pulp beating to other pulp lines; and inputting the pulp after the pulp beating into a pulp feeding tank. The processing method of the paper pulp provided by the application utilizes the surplus capacity of the pulp squeezing machine of the existing pulp beating workshop in the factory, improves the pulp washing efficiency through process flow technical improvement of part of the pipelines and equipment, improves the pulp cleanliness through the process technical method, improves the pulp COD, PCD and odor value, improves the pipeline pulp feeding capacity, meets the quality and pulp demand of the paper machine for the chemical pulp, and further improves the proportion of the chemical pulp, and reduces the comprehensive cost per ton of paper.

The invention discloses a preparation method and application of a lyocell fiber glue solution, and belongs to the technical field of lyocell fiber production. The preparation method comprises the following steps: mixing pulp, an additive and an NMMO (N-methylmorpholine-N-oxide) aqueous solution, and swelling to obtain a premix; the pulp comprises LYOCELL pulp and chemical pulp; and heating and dissolving the premix, filtering and backwashing to obtain the lyocell fiber glue solution. By optimizing key index control in LYOCELL process production, batch continuous use of the chemical pulp in LYOCELL production is realized, and the production cost is reduced. Furthermore, in the glue solution filtering stage, the filtering temperature is increased, the backwashing frequency is increased, and meanwhile the backwashing pressure difference interval is reduced, so that it is ensured that impurities in the glue solution are removed more sufficiently.

The utility model relates to a kind of recycled concrete aggregate chemical slurry vacuum impregnation device, belong to concrete processing technical field.Mainly including rack, impregnation tank, stirring assembly, vacuum pump, filter screen cylinder, liquid supply pump, drain pipe and annular bulkhead;Through the cooperation design of filter screen cylinder and annular flow guide cavity, make chemical slurry pass through the aperture of filter screen cylinder and enter inside and contact with recycled aggregate uniformly, combined with the synergistic effect of stirring assembly and vacuum pump, realized the depth penetration of chemical slurry under vacuum negative pressure, significantly improved the filling effect of slurry to aggregate surface pore, effectively solved the problem of concrete strength decline caused by insufficient slurry penetration of traditional device, simultaneously, through the accurate temperature control function of heating cavity and temperature sensor, further increase the fluidity of slurry, thereby improve the impregnation quality and efficiency.

Celluloses are taken from industrial trees by means of chemical pulp processing method which does not give damage to environment, and turned into fiber form, and fibers of industrial trees are turned into dental floss form. As said industrial tree; a kind of tree selected from beech tree, birch tree, poplar tree, elm and oak tree is used.

The application relates to a chemical pulp slurry extraction device with an anti-blocking structure and belongs to the technical field of slurry production; a No. 1 driving shaft is rotatably arranged on the bottom wall of an extraction tank through a bearing, the upper end of the No. 1 driving shaft is fixedly provided with a sieve cylinder, the sieve cylinder is located at the inner side position of the extraction tank, the lower end of a No. 2 driving shaft is rotatably connected with a support frame through a bearing, the extraction tank is provided with a cleaning assembly connected with the No. 2 driving shaft, the No. 2 driving shaft is provided with an anti-blocking cleaning assembly connected with the sieve cylinder, the extraction tank is provided with a residue discharging assembly connected with the anti-blocking cleaning assembly, the centrifugal force can be utilized to realize dynamic and efficient separation of the slurry, the internal coaxial screw frame and the scraping rod can continuously self-clean under differential rotation, impurities can be timely peeled off and discharged, the sieve hole is ensured to be unobstructed, the synchronous and continuous operation of separation, cleaning and residue discharging is realized, the shutdown and blockage cleaning frequency is reduced, the slurry extraction efficiency and stability are improved, and the energy consumption and maintenance cost are reduced.

The application provides a paper product, a paper pulp and a preparation method thereof; the preparation method of the paper pulp comprises the following steps: spraying a cationic dry strength agent on the surface of an alkaline hydrogen peroxide mechanical pulp semi-dry pulp; adding polyaluminum chloride into pulp water; mixing the alkaline hydrogen peroxide mechanical pulp semi-dry pulp, on the surface of which the cationic dry strength agent is sprayed, with the pulp water, in which the polyaluminum chloride is added, to carry out pulp beating; performing grinding on the pulp after the pulp beating; and adding an amphoteric dry strength agent into the pulp after the grinding. The preparation method of the paper pulp provided in the application improves the comprehensive strength of APMP (alkaline hydrogen peroxide mechanical pulp) semi-dry pulp through a series of pretreatments, including fiber charge modification and coating enhancement, during the process of pulp beating of the APMP semi-dry pulp to pulp, so that the proportion of APMP pulp in paper is increased or the ash content of paper is increased, thereby reducing the consumption of chemical pulp fibers and saving costs.

The invention discloses a preparation method of high-bulk cashier thermosensitive base paper, which comprises the following operation steps: S1, mixing bleached softwood chemical pulp, bleached hardwood chemical pulp and bleached chemithermomechanical pulp which are beaten according to a certain proportion to form mixed pulp; s2, auxiliary materials are added into the mixed pulp to be evenly mixed, desanding is conducted through a screening system, refined pulp is diluted, and wet paper sheet manufacturing is completed on a net part; s3, the wet paper sheet enters a pressing part to be subjected to composite pressing, then enters a front-section drying cylinder to be dried, then is subjected to paper sheet surface treatment and sizing, and enters a rear-section drying cylinder to be dried after sizing surface treatment; and S4, feeding the dry paper sheet into a calendaring area, and finishing the paper sheet to obtain the paper sheet of which the paper sheet smoothness meets the requirement, namely the high-bulk cash register thermosensitive base paper. According to the preparation method of the high-bulk cash register thermosensitive body paper, the prepared high-bulk cash register thermosensitive body paper has the advantages of excellent bulk, excellent dry and wet strength, excellent surface strength, excellent color development performance, excellent image storage performance and the like.

The utility model relates to recycled concrete aggregate chemical slurry wrapping and reinforcing drying equipment, and belongs to the technical field of concrete processing. The device mainly comprises an outer roller, a middle roller, an inner roller, a driving mechanism, a wall scraping assembly, a heating assembly and a rack, by means of the multi-layer nested structure design of the inner roller, the middle roller and the outer roller, aggregate flows forward and reversely in the rollers, the problem of uneven drying caused by aggregate accumulation is avoided by combining the flow guiding and dispersing effects of the spiral flow guiding plates and the arc-shaped flow guiding plates, and the drying effect is improved. In addition, the movement path and the retention time of the aggregate in the roller are prolonged, and the drying effect is remarkably improved; and meanwhile, the stirring and wall scraping functions of the wall scraping assembly effectively prevent aggregate accumulation and ventilation hole blockage, and the heating assembly is matched for use, so that the drying efficiency and the aggregate quality are further improved, and the maintenance cost is reduced.

A paperboard core layer preparation process for performing accurate grinding treatment on chemi-mechanical pulp comprises a step of preparing the chemi-mechanical pulp through a chemi-mechanical pulp production line, and further comprises the following steps: pulp supply: the chemi-mechanical pulp production line provides the chemi-mechanical pulp to a double-disc mill; pulping: performing accurate grinding processing on the chemithermomechanical pulp by using the double-disc mill to obtain accurately ground chemithermomechanical pulp; material mixing: conveying the finely ground chemi-mechanical pulp to a core-layer pulp mixing tank, and mixing with chemi-mechanical pulp, waste pulp and chemical pulp in the core-layer pulp mixing tank to form mixed pulp; and paper making: conveying the mixed pulp to a PM32 paper machine for paper making. Accurately-ground chemi-mechanical pulp is added into the core layer through stable pulp preparation and is uniformly mixed with non-accurately-ground chemi-mechanical pulp and broken paper pulp, and the fiber length and the separating degree are balanced, so that the fiber interweaving capacity of the core layer is improved, the fibers are interwoven more tightly, the binding force between the fibers is enhanced, and the fiber bonding strength and the folding strength are improved. Compared with the prior art, the production cost can be greatly reduced on the premise of ensuring the performance of the paperboard.

This invention provides a method for preparing Lyocell fibers using ordinary chemical pulp. The method involves first pretreating the ordinary chemical pulp, then purifying the pretreated pulp using two stages of dilute NMMO solutions of different concentrations to remove hemicellulose. The purified pulp is then spun using a dry-jet wet-spinning process to obtain Lyocell fibers. The resulting Lyocell fibers possess the same or some superior properties as Lyocell fibers prepared using dissolving pulp. This invention provides a simple, green, and environmentally friendly preparation method that can be effectively combined with existing Lyocell fiber manufacturing processes, significantly reducing the manufacturing cost of Lyocell fibers.

The invention relates to the technical field of building solid waste resource utilization, in particular to a recycled coarse aggregate strengthening process for concrete processing and a device thereof.The process comprises the following steps that S1, raw material pretreatment is conducted, specifically, waste concrete is crushed and screened to obtain recycled coarse aggregate with the particle size being 5-26 mm, and the recycled coarse aggregate is subjected to washing impurity removal and low-temperature drying to constant weight; s2, composite modification treatment: preparing a composite modification liquid, immersing the pretreated recycled coarse aggregate into the composite modification liquid, performing centrifugal stirring to assist permeation, and after soaking is completed, screening out redundant modification liquid on the surface; s3, carbonization curing treatment: placing the recycled coarse aggregate with the modified liquid attached to the surface in a closed environment, introducing CO2 gas, and carrying out carbonization reaction, chemical slurry is adopted for wrapping, CO2 is added for carbonization curing, the silicate-based modified liquid can effectively block surface pores and microcracks, the subsequent carbonization reaction can react with a hydration product such as Ca (OH) 2 in the slurry to generate calcium carbonate, and the surface of the recycled coarse aggregate is coated with the modified liquid. And further compacting the reinforced layer.

The application relates to the technical field of pulping and papermaking, and provides a decorative base paper suitable for water-based ink printing and a preparation method thereof. The decorative base paper comprises, from bottom to top, a main body layer, a transition layer and a functional layer. The main body layer comprises bleached chemical pulp, a wet strength agent and nanocellulose; the transition layer comprises a barrier material, a filler and an acrylic emulsion; and the functional layer comprises silicon dioxide, polyvinyl alcohol, an acrylic emulsion and a crosslinking agent. Through the synergistic effect of the three-layer structure, the problems of wetting instability, slow drying, dot diffusion and fluffing and powdering in water-based ink printing are effectively solved, meanwhile, the defect of resin impregnation being hindered due to excessive sealing of the surface is avoided, so that rapid ink absorption and clear imaging can be realized in the printing stage, and good resin permeability can be maintained in the impregnation stage, thereby the water-based ink printing adaptability and the subsequent processing performance of the decorative base paper are taken into account.