54 results about "Paper manufacturing" patented technology

The invention relates to a method for manufacturing SCK paper having a basis weight in the range of 50 to 100 g / m2, wherein an optimal combination of nonrecycled BCP, BCTMP and recycled pulp obtained from release liner supercalendered Kraft paper is used to adjust the properties of the fiber furnish. While the use of BCTMP enables a product having a higher bulk, the recycled pulp component, which has high compatibility with the paper manufacturing process, enables to balance the manufacturing process and reduce the dimensional changes and shrinkage of the formed SCK paper. The combined presence of the BCTMP and the recycled pulp component in the fiber furnish improves the water removal from the fibers during the SCK paper manufacturing, while the presence of non-recycled BCP produced from softwood improves the formation and runnability of the paper web on the paper machine. This enables to produce SCK paper with improved sustainability, wherein the density may be controlled by means of the fiber furnish, without downgauging and without adverse effects to other paper properties, which would prevent the use of the SCK paper as substrate layer in a release liner.

The invention relates to a method for manufacturing glassine paper having a basis weight of less than 50 g / m2, wherein an optimal combination of BSKP, BHKP and BCTMP is used to adjust the properties of the fiber furnish. In glassine papers with very low basis weight the formation of the paper web upon paper manufacturing may be controlled by means of the fiber furnish optimization, which can be used to produce exceptionally thin glassine paper without downgauging and without adverse effects to other paper properties, which would prevent the use of the glassine paper as substrate layer in a release liner. Thus glassine paper with a moderate share of BCTMP in the fiber furnish may be produced, that has quality characteristics of the paper sufficient for use as a substrate layer of an industrial release liner.

The present application relates to paper manufacturing technical field, specifically to a kind of paper surface sizing device, including gluing support, first gluing guide roller is rotatably arranged on the gluing support, second gluing guide roller is rotatably arranged below the first gluing guide roller, third gluing guide roller is rotatably arranged in the right side of the first gluing guide roller, fourth gluing guide roller is rotatably arranged below the third gluing guide roller;First L-shaped support plate, second L-shaped support plate are symmetrically arranged on the gluing support, glue outlet module is fixed on the top of the first L-shaped support plate, the top of second L-shaped support plate, first glue conveying pipe, second glue conveying pipe are connected first gluing module, second gluing module respectively in the glue outlet module, and the first gluing module, second gluing module are all located below glue outlet device.The paper surface sizing device of the present application can evenly apply glue to the surface of paper.

The utility model discloses a driving device capable of shortening discharging downtime, and belongs to the field of corrugated paper manufacturing equipment. The utility model discloses a double-clutch transmission device which comprises a base, a first driving motor and a second driving motor, the first driving motor and the second driving motor are installed on the base, the power of the first driving motor is 315 kw, the power of the second driving motor is larger than or equal to 500 kw, the output end of the first driving motor is connected with a first clutch, and the output end of the second driving motor is connected with a second clutch. The first clutch and the second clutch are used for being connected with the input end of an unwinding roller through a transmission assembly, and the first driving motor and the second driving motor can be switched for use. According to the invention, the paper flying phenomenon in the shutdown process can be solved.

The utility model provides a kind of reel paper pressing forming device, belong to reel paper manufacturing field.It includes bottom table, the bottom table is equipped with pressing plate, the pressing plate is equipped with paper feed passage between bottom table, the bottom table is equipped with outer forming cylinder, the outer forming cylinder is equipped with inner forming cylinder, the outer forming cylinder is equipped with forming passage between inner forming cylinder, the inlet of the forming passage is communicated with the outlet of paper feed passage, the inlet of the paper feed passage is equipped with paper pusher plate sliding on bottom table, the paper pusher plate is connected with paper feed transverse drive, without manual paper is placed on heating strip or manually push paperboard and manually push pressing mould to form.

This utility model relates to the field of stone paper manufacturing technology and discloses a foldable honeycomb panel based on stone paper, comprising: a base plate; a folding strip fixedly connected to the outer wall of the base plate; and a connecting assembly fixedly connected between the base plate and the folding strip. In this foldable honeycomb panel based on stone paper, the mating side plates and mating front plates are inserted into the connecting slots of the connecting plate, and each set of fixing rods is inserted into the corresponding slots and fixing slots on the top of the mating side plates and mating front plates to complete the assembly between the mating side plates and the mating front plates. The connection between the connecting plate, the mating front plates, and the fixing rods is strengthened by the reinforcing rods engaging with the positioning holes, mounting holes, and reinforcing slots, preventing displacement or loosening of the components during use. The elasticity of the binding straps provides a buffering effect when the honeycomb panel is subjected to external impact or vibration, while further strengthening the connection between the mating front plates and the mating side plates.

The application provides a bobbin base paper and a bobbin base paper manufacturing method, wherein the bobbin base paper comprises a bottom paper layer, a core paper layer, a lining paper layer and a surface paper layer which are sequentially arranged, each paper layer is made of mixed pulp material composed of pulp residue, wood fiber pulp, starch and waste paper pulp by the circular net forming technology, wherein the proportion of the pulp residue, the wood fiber pulp, the starch and the waste paper pulp in the mixed pulp material is 60%-80%, 10%-30%, 1%-5% and 0-15% respectively. By changing the proportion of the pulp residue, the wood fiber, the waste paper pulp and the starch, using the low-price wood fiber pulp, adding most of the pulp residue and reducing the use of the waste paper pulp, the manufacturing cost of the bobbin base paper is reduced, and the performance-price ratio of the bobbin base paper is improved.

The invention provides a technology of a more appropriate resin countermeasure in a paper manufacturing process. Provided is a method for estimating the amount of large stickies in paper manufacturing on the basis of the amount of acrylate-based polymers contained in a management subject in paper manufacturing. Provided is a method for manufacturing paper, in which the level of large stickies countermeasures in paper manufacturing is adjusted on the basis of an increase or decrease in the amount of an acrylate-based polymer contained in a management subject in paper manufacturing.

The present application relates to the technical field of cellulose laminated paper manufacturing, in particular to a high-strength laminated paper and a preparation process thereof. The present application overcomes the problem of poor strength of laminated paper produced by traditional process. By compounding different types of extracted fibers, optimizing the process, improving the mechanical properties, adding sisal pulp to form a nano skeleton, long fiber of coniferous wood pulp directional interweaving to improve tensile homogeneity, eucalyptus pulp short fiber filling pores and aramid grafting to enhance interface bonding, the obtained paper pulp produces base paper; combined with pre-pressing dewatering to close pores and gradient drying to regulate hydrogen bond density, supplemented by rigid-elastic roller alternate calendering to realize the synergy of surface densification and internal flexibility; using a copolymer-based laminating system, nano material and chitosan composite reinforcement layer bonding, oxidation starch compatibilization and plasticization modification synergistic promotion of compost degradation; large pore closure and surface micropore refinement precise regulation of air permeability, the laminated paper meets the air permeability requirement, while realizing more than 90% biodegradation rate.

The invention provides a novel laser transfer paper composite manufacturing process, and relates to the field of laser composite paper manufacturing, the novel laser transfer paper composite manufacturing process comprises two strip-shaped rack bases, the rack bases on the two sides are respectively and fixedly provided with two vertical main stand columns, and the two sides of the top of the main stand column on each side are provided with lifting cross beam mounting seats capable of moving in a lifting mode; the lifting cross beam mounting seats on the two sides are symmetrically arranged, and a main supporting cross beam of the cross frame is fixedly arranged at the tops of the lifting cross beam mounting seats. Pressing gap pressure is accurately adjusted through the lifting driving rod, pressing force is guaranteed to be evenly distributed, the mirror face cooling steel roller is matched with the rubber pressure roller, rapid cooling curing, secondary pressing binding force strengthening and flatness improving are achieved, meanwhile, composite paper is immediately stable after being pressed, follow-up drying is not needed, energy consumption is reduced, all parts of the equipment work cooperatively, and the production efficiency is improved. Continuous production is achieved, output products can be directly coiled or cut, and production efficiency and product quality are improved.

The present disclosure generally relates to aqueous cationic polyacrylamide (CPAM) dispersions, methods of preparation and methods of use thereof, particularly in the paper industry. For example, these CPAM dispersions may be used in any of the following: (i) sticky control in paper manufacturing (ii) fixing in paper manufacturing, (ii) sludge dewatering, and / or (iii) oil-water separation. Moreover, the present disclosure generally pertains to CPAM dispersions, wherein such CPAM dispersions are aqueous dispersions which are shelf stable at room temperature, methods of preparation and methods of use thereof in papermaking applications and in products such as paper-based products. The disclosed CPAM dispersions may be used as retention aids in papermaking processes, may increase retention of starch to a formed paper web and / or board web, and may provide increased dry strength to paper-based products.

The present invention provides certain paper enhancing compositions, typically aqueous compositions, for use in the manufacture and coating of paper, and paper products. The paper enhancing compositions provide certain paper processing advantages and distinct final paper product characteristics. The present invention further provides carbonate enhancing composition useful for preparing enhanced carbonate compositions used in the paper manufacturing processes.

The utility model provides a rich mineral paper papermaking device, and relates to the technical field of rich mineral paper manufacturing, the rich mineral paper papermaking device comprises two supporting plates, two belt wheels are connected between the two supporting plates, a forming net is connected between the two belt wheels, the tops of the two supporting plates are provided with a feeding port and a drying mechanism, and a rolling structure is arranged between the feeding port and the drying mechanism; the rolling structure comprises a rolling part arranged between the two supporting plates, the rolling part is connected with two connecting rods, a second connecting plate is fixedly connected between the tops of the two connecting rods, the second connecting plate is connected with a threaded rod through a bearing, and the outer surface of the threaded rod is in threaded connection with the first connecting plate. According to the paper pulp rolling device, the threaded rod is arranged, the second connecting plate can be driven to ascend and descend in the rotating process of the threaded rod, the rolling part can be adjusted through the two connecting rods in the ascending and descending process of the second connecting plate, so that the rolling requirements of paper pulp with different thicknesses are met, and the application range of the paper pulp rolling device is widened.

The invention provides novel stained paper and a manufacturing process thereof, and relates to the technical field of stained paper manufacturing, and the novel stained paper comprises a base layer and a coating layer, the base layer is pretreated plant fiber base paper, and the coating layer covers at least one surface of the base layer. According to the novel stained paper and the manufacturing process thereof, the sodium carboxymethyl cellulose and the chitosan in the coating layer can form a compact film structure to block moisture permeation, tests show that the stained paper does not have obvious permeation and damage within 24 hours after being in contact with moisture, and the water resistance of the stained paper is remarkably superior to that of common stained paper. The flexibility of the coating layer can be enhanced by the glycerol, so that the paper is prevented from being broken due to embrittlement after being coated; the sodium carboxymethyl cellulose and the chitosan are both degradable materials, so that no environmental burden is caused, and the environmental protection problem of the polyethylene coating type stained paper is solved. The coating layer and the base layer are closely combined after pretreatment, the falling phenomenon is not prone to occurring, the overall paper strength is improved, the packaging form can be kept for a long time, and the paper is suitable for long-distance transportation scenes.

To provide a softener for papermaking which can simultaneously impart high flexibility and high water absorbency while maintaining the strength of paper, and can suppresses the generation of odor.SOLUTION: A softener for papermaking includes: a polyoxyalkylene hardened castor oil as a component A; a quaternary cationic surfactant containing an imidazoline ring as a component B; and a polyether polyol (excluding the component A) as a component C.SELECTED DRAWING: None

The utility model relates to gold and silver paper manufacturing equipment technical field especially a kind of gold and silver paper making machine, it includes rack, paper feeding device, gold stamping device, paper cutting device, stamping device and paper outlet device. Paper feeding device synchronous delivery two gold and silver paper strips. Stamping device includes stamping drive assembly, stamping table and the stamping assembly located above stamping table. Stamping assembly includes the mount erected on stamping table and the two stamping pieces and pressing piece set on mount. The gold and silver paper after cutting is located on stamping table, pressing piece and the upper surface of stamping table are correspondingly set, and one stamping piece is set in the two sides of stamping table along conveying direction, to make the two gold and silver paper after cutting bend and show integral. Stamping table is the mould of gold and silver paper folding, pressing piece presses gold and silver paper, can prevent gold and silver paper misplacement in stamping process, improve stability in stamping process and the precision of stamping folding, to improve the yield of finished product, and processing effect is higher.

The application belongs to the technical field of paper manufacturing, and particularly relates to a silicone oil paper, which comprises a center base paper layer, the center base paper layer being kraft paper; further comprises a composite filling layer, the composite filling layer comprising a hot melt adhesive layer and a grid layer; and an outer base paper layer, the outer base paper layer being arranged on both sides of the center base paper layer, and the outer surface of the outer base paper layer being provided with a coating layer; wherein the composite filling layer is arranged between the outer base paper layer and the center base paper layer, the center base paper layer, the composite filling layer and the outer base paper layer are fixedly connected with each other, the setting of the composite filling layer can effectively improve the high-temperature resistance and structural strength of the silicone oil paper, the silicone oil paper is not prone to damage and can be repeatedly used, the service life of the silicone oil paper is improved, and the production, transportation and use requirements of the silicone oil paper are met.

The invention relates to a recycling method of mica paper manufacturing tail water, in particular to the field of mica paper.The recycling method comprises the steps that the mica paper manufacturing tail water is subjected to adsorption treatment through an adsorbent, and return water is obtained; mixing the backwater with water, and then recycling the backwater and the water; the mass concentration of the flocculating agent in the mica paper manufacturing tail water is greater than or equal to 0.3%; the volume ratio of the return water to the water is (3-7): (3-10). According to the recycling method provided by the invention, the content of the flocculating agent in the water body is controlled by adopting a specific treatment process on the tail water, so that the flocculating agent is promoted to generate a positive effect on preparation of the mica paper, and meanwhile, the maximum recycling of the return water is ensured, so that the utilization rate of the return water is increased.

The invention relates to a method for treating the exhaust gases of a paper, paperboard and / or tissue manufacturing machine (2), comprising the following steps: a) conveying the exhaust gases, which are discharged from a drying hood (7) of a drying station zone (5) of the manufacturing machine (2) and contain odorant substances and water vapour, to at least one scrubber (3) operated with cooling wash water; b) removing at least a portion of odorant substances contained in the exhaust gas and condensing at least a portion of water vapor contained in the exhaust gas by bringing the exhaust gas into contact with the cooled scrubbing water of the scrubber (3); and c) discharging the cooled wash water heated by contact with the exhaust gas out of the scrubber (3) and feeding the heated cooled wash water into a heat exchanger of a heat pump evaporator (8) of the heat pump (4) in order to evaporate the heat pump working medium. The invention also relates to a device (1) for carrying out such a method.

The utility model relates to the technical field of paper manufacturing, and particularly discloses an automatic kraft paper extrusion forming device which comprises a rack, the right side in the rack is rotationally connected with an unwinding roller through a bearing seat, the left side of the rack is rotationally connected with a guide roller and a winding roller through a bearing seat, and the winding roller is located above the guide roller. A lower extrusion roller is rotationally connected to the portion, between the guide roller and the unwinding roller, in the rack through a bearing seat, an upper extrusion roller is arranged above the lower extrusion roller, the upper extrusion roller is connected with the rack through a lifting mechanism, and water scraping pieces are arranged at the left end of the lower extrusion roller and the right end of the upper extrusion roller correspondingly. The water scraping piece is used for removing water on the surfaces of the upper extrusion roller and the lower extrusion roller, and an air drying mechanism is arranged in the rack. The water scraping pieces are arranged on the side walls of the upper extrusion roller and the lower extrusion roller, so that residual water on the surfaces of the extrusion rollers can be removed in time, the water is prevented from being transferred to kraft paper, water spots or water marks are prevented from appearing on the surface of paper, and the fiber binding force of the paper is improved.

The invention belongs to the technical field of ceramic nanofiber paper manufacturing, and particularly relates to flexible ceramic nanofiber paper and a folding and shaping method and application thereof, and the method comprises the following steps: synthesizing a linear inorganic molecular chain with long-short side groups, preparing into a fiber spinning solution, and spinning into a precursor; performing infrared heating softening and folding shaping on the precursor; calcining to obtain ceramic nanofiber paper; the linear inorganic molecular chain with the long-short side group is prepared by the following steps: carrying out coordination modification on a metal alkoxide monomer by using a long / short inert ligand, and carrying out copolymerization and chain extension to obtain the linear inorganic molecular chain with the long-short side group; ultrasonic vibration is carried out in the folding and shaping process; and then cooling. Compared with the prior art, the problems that existing ceramic nanofiber paper of a three-dimensional structure is poor in performance, and the structure is difficult to maintain are solved. According to the scheme, through synergistic improvement of a precursor structure and a process, the ceramic nanofiber paper has excellent flexibility and structural stability, and the integrity and stability of a three-dimensional structure are improved.

The application discloses a mixing device for high-strength laminated paper manufacturing and belongs to the laminated paper processing field. The mixing device comprises a mixing cylinder, a mixing cavity is formed in the mixing cylinder, a stirring assembly is arranged at the top of the mixing cavity of the mixing cylinder, the stirring assembly comprises a transmission disc rotatably embedded and arranged at the top of the mixing cylinder, a first stirring frame is fixed to the bottom of the transmission disc, a transmission ring is rotatably embedded and arranged at the top of the mixing cylinder, a second stirring frame is protrudingly arranged at the bottom of the transmission ring, a reduction gear box is arranged at the center of the top of the mixing cylinder, and a transmission gear is arranged in the transmission cavity. The application has the beneficial effect of providing a mixing device for high-strength laminated paper manufacturing. The liquid is stirred in different directions at different times, so that the laminar flow state can be avoided for as long as possible in subsequent work, the turbulent shear effect is insufficient, and the formula components cannot break through the molecular diffusion limit and other conditions.

This invention belongs to the field of paper manufacturing inspection technology, and relates to an online inspection system for post-processing of household paper based on AI vision. It includes an environment-deformation perception module, an imaging calibration module, a speed acquisition module, a threshold calculation module, a defect statistics module, a sensitivity calculation module, an AI vision inspection core module, and a production linkage module, with each module establishing a communication connection. The environment-deformation perception module collects temperature, humidity, and paper contour data and outputs normalized deviation and deformation. The imaging calibration module outputs imaging calibration coefficients based on multi-parameter quantization calculations. The threshold calculation module and the sensitivity calculation module, respectively, output dynamic detection thresholds and process detection sensitivity coefficients based on pre-set parameters. This invention improves the parameter matching and process coordination of post-processing inspection of household paper.

The application belongs to the technical field of insulating paper manufacturing, and particularly relates to a high-temperature-resistant insulating paper and a preparation method thereof. The application uses different lengths of polyester fibers as the main structure of the insulating paper, so that the polyester short-cut fibers form a main force network, the polyester deposition fibers fill and bridge the inter-fiber pores, the insulating paper forms a controlled viscous flow welding in a non-melting state under a high-temperature environment, the flat strip shape of the polyester deposition fibers effectively fills the skeleton pores, and the residual pores are converted from a connected state to a closed state, thereby significantly reducing the porosity and local thickness deviation. The modified alumina fibers and the fumed white carbon black are mixed, and then the surface is modified by dopamine to obtain an inorganic modified filler. The polydopamine interface layer can enhance the bonding force between the filler and the polyester, so that the high-temperature-resistant insulating paper with uniform thickness, low porosity and high interlayer bonding force is obtained, and the insulating paper used for the insulating layer of a flexible cable can prevent the problem of partial discharge caused by moisture absorption of the insulating paper.

The utility model belongs to the technical field of abrasion-resistant paper manufacturing, and particularly relates to cutting equipment for abrasion-resistant paper manufacturing, which comprises a cutting body and a control panel arranged on one side of the cutting body, a cutting tool is arranged in the cutting body, a discharging table plate is arranged on the back side of the cutting body, and the discharging table plate is arranged on the control panel. The front end of the cutting body is connected with a feeding platen. According to the wear-resistant paper feeding device, wear-resistant paper is placed on the feeding table plate, then the adjusting screw rods at the two ends of the limiting plate are rotated, positioning bearings at one ends of the adjusting screw rods are driven to rotate, the wear-resistant paper is fed into the feeding table plate, and the wear-resistant paper is fed into the feeding table plate. According to the wear-resistant paper cutting device, the two distance adjusting plates are driven to adjust the distance in the limiting plate, the two distance adjusting plates can conveniently limit and clamp wear-resistant paper, then the cutting tool is controlled through the control panel to cut the wear-resistant paper, the wear-resistant paper cutting regularity is improved, the wear-resistant paper is prevented from deviating, and the wear-resistant paper cutting efficiency is improved.

The invention relates to the technical field of mica paper manufacturing, and discloses mica paper manufacturing mica slurry separation treatment equipment which comprises a slurry tank body used for containing mica slurry, and a vertically-arranged center guide cylinder is installed in the center of the interior of the slurry tank body. The inner space of the slurry tank body is divided into an upward flow area and a backflow area by the central guide cylinder, a shaftless flexible spiral is coaxially mounted in the central guide cylinder and used for driving mica slurry to flow upwards along the central guide cylinder, and a pulsation modulation assembly is arranged at an outlet in the top end of the central guide cylinder and used for modulating the pulsation of the mica slurry. The pulsation modulation assembly is used for converting continuously rising slurry into pulsation jet flow, and a flexible scattering assembly is arranged over the pulsation modulation assembly in a suspended mode. The pulsating fluid generated by the shaftless spiral drives the elastic memory alloy film disc at the top to perform high-frequency self-oscillation, so that the risk that brittle crystals are broken in a strong shearing area is fundamentally avoided, and the physical strength and the insulation integrity of subsequent finished paper are remarkably improved.

The utility model discloses a heavy slag pipeline structure of a flotation sieve, and belongs to the field of corrugated paper manufacturing equipment. The slag discharging device comprises a slag discharging main pipe connected to the bottom of the flotation screen, a pressure relief opening is formed in the side face of the slag discharging main pipe and connected with a pressure relief valve, the discharging end of the pressure relief valve is connected with a pressure relief side pipe, and the length of the pressure relief side pipe is smaller than 0.5 m. According to the invention, excess pressure generated in the deslagging process can be effectively released, so that the vibration phenomenon caused by pressure fluctuation of the pipeline is obviously reduced, and the stability and safety of a pipeline system are improved. In addition, the length of the pressure relief side pipe is controlled within 0.5 m, the pressure loss in the pipeline can be remarkably reduced, it is ensured that the pressure relief valve quickly responds to pressure changes, and meanwhile secondary blockage caused by accumulation of materials in the side pipe is effectively avoided through the compact structural design.

The invention discloses a regenerated raw material recovery device for ecological paper manufacturing, which comprises a shearing and crushing unit, a rolling screening unit, a magnetic separation and winnowing integrated unit and an integrated box body, a shearing crushing unit, a rolling screening unit and a magnetic separation and winnowing integration unit are sequentially arranged in the length direction of the integrated box body from top to bottom, and the shearing crushing unit, the rolling screening unit and the magnetic separation and winnowing integration unit are integrated in the integrated box body. Compared with traditional manual sorting, the treatment efficiency and the purification effect of waste paper raw materials are remarkably improved, manual transfer and conveying are not needed among the units, manual intervention is reduced, the space utilization rate of the equipment is greatly optimized, multiple impurity discharging ports and a sealed discharging structure are arranged on the side face of the integrated box, impurities are separated layer by layer, and the waste paper raw materials are separated more effectively. And the high efficiency of impurity separation and the sealing performance of equipment operation are ensured, and secondary pollution is effectively prevented.

The invention belongs to the technical field of environmental barrier coatings, and particularly relates to a preparation method of an anti-laser ablation coating based on C / C-SiC paper, the coating is prepared through single-layer or laminated pasting of prefabricated C / C-SiC paper, the C / C-SiC paper is composed of carbon fibers, a carbon matrix, SiC, a modifier and a binder, and the fibers in the paper are lapped and entangled to form two-dimensional net paper. The preparation method of the coating comprises the following steps: S1, manufacturing C / C-SiC paper; and S2, attaching the C / C-SiC paper to the surface of the base material, and performing hot-pressing curing to prepare the coating which is mechanically interlocked and combined with the surface of the base material. According to the method, the C / C-SiC paper is prefabricated, the anti-laser ablation coating is prepared through a paper pasting method, the anti-scouring capacity of the coating is effectively improved through lap joint and entanglement of fibers in the paper, the coating is prepared through the paster conveniently and rapidly, the paster can adapt to any shape through cutting, the preparation efficiency is high, the equipment requirement is low, and the paster can also be used for rapidly repairing the damaged coating; and the anti-laser real-time protection requirement can be met.

This invention belongs to the field of special functional paper manufacturing technology, specifically relating to a reinforced electronic carrier paper and its preparation method. It includes a base paper layer and a surface sizing layer attached to at least one surface of the base paper layer. The base paper layer includes 0.05%-2% cationic nano-reinforcing agent by weight of oven-dry pulp, with a zeta potential of +5 to +100 mV. The surface sizing layer includes a bio-based heat-resistant resin and an anionic nano-reinforcing agent, with the anionic nano-reinforcing agent accounting for 2%-25% of the surface sizing layer by weight, and having a zeta potential of -5 to -100 mV. The use of cationic nano-reinforcing agents in the base paper allows for efficient anchoring to the fiber network via electrostatic adsorption, strengthening internal bonding and inhibiting paper dust generation. The surface sizing layer utilizes anionic nano-reinforcing agents and bio-based heat-resistant resin to construct a nanocomposite film, precisely controlling surface energy and thermal and moisture stability.