913 results about "Papermaking" patented technology

The invention relates to the technical field of intelligent manufacturing, discloses a papermaking equipment fault tracing method and system based on a process knowledge graph, and discloses the papermaking equipment fault tracing method and system based on the process knowledge graph. The method and the system comprise data acquisition and preprocessing, papermaking process knowledge graph construction, fault event detection and matching, fault tracing and propagation path reasoning, and maintenance scheme recommendation and optimization. The method overcomes the limitation that the traditional method is difficult to capture the cross-equipment, cross-process and cross-time sequence deep causal association and fault propagation path of the papermaking equipment. By constructing a comprehensive papermaking process knowledge graph, equipment operation state data, process parameter data, production quality data, equipment structure principle, process flow knowledge, fault mode knowledge, maintenance experience and other heterogeneous knowledge are subjected to deep fusion and semantic association, so that the system can exceed the correlation of the data surface; and an internal mechanism and a propagation chain of the fault are deeply excavated.

The invention relates to the technical field of papermaking, and particularly provides high-strength tipping base paper for cigarettes and a preparation process of the high-strength tipping base paper. The tipping paper base paper for the cigarettes comprises a fiber raw material; functionalizing the nano cellulose; a cellulase; a dry strength agent; a wet strength agent; and a sizing agent. Nano cellulose is functionalized and a synergistic stepped enhancement mechanism is constructed, so that the synergistic breakthrough of the high-strength raw tipping paper for cigarettes in the aspects of strength, wet strength and air permeability is realized; after the functionalized nanocellulose is subjected to carboxylation treatment, the hydrogen bond and electrostatic adsorption between the functionalized nanocellulose and the fiber are enhanced, and the bonding strength in a dry state and a wet state is remarkably improved; meanwhile, the wet strength agent is added in stages, and the adsorption sequence of the dry strength agent is optimized, so that the reinforcing agent constructs a stable three-dimensional network framework in the paper sheet, and the end breaking risk under high-speed winding is effectively reduced.

The invention relates to the field of intelligent manufacturing, in particular to a papermaking process intelligent parameter adjustment method and system oriented to energy consumption optimization, and the method comprises the following steps: S1, obtaining a historical production and energy consumption report, a product quality standard, a productivity plan, an equipment capability curve and safety red line, and an energy price and carbon emission coefficient, and defining a multi-objective optimization function and constraint; s2, acquiring production process data, and preprocessing the data to obtain time sequence sample data; s3, performing feature construction based on the time sequence sample data to obtain a feature set, and constructing a process-energy consumption directed acyclic graph by adopting NOTEARS to obtain a causal atlas; s4, constructing a short-term energy consumption prediction model and a quality prediction model, and performing short-term energy consumption prediction and quality prediction based on the feature set, the causal atlas, the target KPI and the constraint; and S5, performing multi-objective strategy optimization according to the objective function and constraint, short-term energy consumption prediction and quality prediction results. On the premise of ensuring the product quality and the production safety, the energy consumption of a unit product can be effectively reduced.

A method of making an absorbent structure including mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide adducts (“GPVM”) and / or high molecular weight (“BMW”), glyoxalated polyacrylamide and / or high cationic charge glyoxalated polyacrylamide (“GPAM”) copolymers and high molecular weight (“BMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process.

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 relates to the technical field of sewage treatment equipment, in particular to a papermaking sewage cleaning device which comprises a pretreatment box, a filter screen plate is arranged at the bottom in the pretreatment box, a positioning groove is formed in the lower surface of the filter screen plate and slidably connected with a positioning rod, the bottom of the positioning rod is fixed to two limiting frames, and the two limiting frames are fixed to the side wall of the pretreatment box. The upper side of the moving frame is connected with a brush plate, and the lower side of the moving frame is connected with a first driving assembly. A soft scraper is fixed to the filter screen plate and fixed to a connecting frame, and the top of the connecting frame is connected with a second driving assembly. Inserting holes are formed in the side walls of the connecting blocks and are in sliding connection with bent rods, and the tops of the bent rods are connected with adjusting assemblies. The double-sided automatic cleaning mechanism enables the filter screen plate to be brushed up and down synchronously, so that blockage is avoided, shutdown cleaning is not needed, and continuity is guaranteed. The filter screen plate can be conveniently replaced by a single person through a quick insertion structure, and the maintenance difficulty is reduced. Impurities are automatically guided and collected, stability and resource recovery are improved, and maintenance cost and downtime are reduced.

The invention discloses a production process of high-folding-resistance corrugated base paper, and particularly relates to the technical field of corrugated paper production. The process comprises the following steps: mixing and hydraulically pulping different types of waste paper raw materials to obtain original waste paper pulp with the concentration of 2.5-2.8%; original waste paper pulp enters a classifying screen after being subjected to high-concentration sand removal, coarse screening and low-concentration sand removal, and fibers in the waste paper pulp are screened into long fibers and short fibers; mixing the long fiber pulp and the short fiber pulp in proportion, and carrying out papermaking and surface sizing treatment; wherein the papermaking comprises the steps of forming a net part, squeezing and dehydrating, and drying in a pre-drying part to obtain initial corrugating base paper with the dryness of 90-92%, then carrying out surface sizing treatment on the initial corrugating base paper by using a boiled glue solution, drying at 60-100 DEG C until the dryness is 85-92%, and curling and slitting to obtain the high-folding-resistance corrugating base paper. Stable production of the high-folding-resistance corrugated base paper is achieved through raw material diversification, fiber refining treatment, papermaking process flexible regulation and control and glue solution accurate preparation.

The invention discloses a cellulose paper-based diaphragm for a zinc-iodine battery as well as a preparation method and application of the cellulose paper-based diaphragm. The diaphragm is of a three-layer composite structure and comprises a matrix layer formed by paper pulp fibers such as softwood pulp, hardwood pulp, bamboo pulp or straw pulp through a wet papermaking technology, and compact functional layers which cover the two sides of the matrix layer and are formed by oxidized nanocellulose (TOCN). The preparation method mainly comprises the following steps: preparing the paper-based diaphragm matrix through wet papermaking, coating the two sides of the paper-based diaphragm matrix with TOCN aqueous dispersion, and finally carrying out hot-pressing drying treatment to enable the three layers to be tightly combined. According to the invention, the nano aperture and the surface negative electricity functional group of the TOCN layer are utilized, so that physical blocking and electrostatic repulsion of polyiodide ions can be realized at the same time, and the shuttle effect is effectively inhibited; and the uniform pore channels can guide zinc ions to uniformly deposit and inhibit dendritic crystal growth. The diaphragm is green in raw material, simple in process and low in cost, and the cycle life and coulombic efficiency of the battery can be remarkably improved when the diaphragm is applied to the zinc-iodine battery.

The invention relates to the technical field of papermaking wastewater treatment, and provides papermaking wastewater environment-friendly treatment equipment which comprises an air floatation tank, a fixing frame, an aeration mechanism, a supporting frame, a primary filtering mechanism and a secondary filtering mechanism, the aeration mechanism and the supporting frame are oppositely arranged, and the aeration mechanism is used for introducing gas into wastewater in the air floatation tank; the primary filtering mechanism and the secondary filtering mechanism are both rotationally arranged on the supporting frame, the secondary filtering mechanism is arranged on the primary filtering mechanism in a sleeving mode, the primary filtering mechanism is used for filtering waste water conveyed into the air floatation tank, and the secondary filtering mechanism is used for filtering foam on the liquid level in the air floatation tank; according to the technical scheme, the equipment for treating the papermaking wastewater is used for solving the problem that in the prior art, the size of impurities treated by equipment cards for treating the papermaking wastewater is relatively single.

The invention discloses a grab bucket sediment grabbing control method, a grab bucket sediment grabbing control system and a grab bucket sediment grabbing control device based on torque detection, relates to the technical field of material grabbing equipment control, and is particularly suitable for accurate sediment grabbing in industries such as papermaking and sewage treatment. Dynamic judgment of sediment contact is achieved by combining torque polarity transformation and change rate threshold filtering, and the defects of dependence on visual monitoring and preset lowering depth are overcome; the system is composed of a PLC master controller, a frequency converter drive, a motor hoisting mechanism, an encoder position detection and a man-machine interaction interface, high-speed data communication and accurate control are achieved through a DP network, and safe operation of equipment is guaranteed by adopting a multi-stage safety protection mechanism; the sediment grabbing precision and efficiency are improved, equipment abrasion is reduced, unattended continuous operation is achieved, and the sediment grabbing device adapts to the complex underwater environment and has good practical value and popularization prospects.

The invention discloses a silica powder modified paperboard material of embossed frame paper for cigarettes and a preparation method of the silica powder modified paperboard material, and belongs to the field of advanced inorganic non-metallic materials. The material comprises bleached chemical wood pulp, core-shell structure in-situ modified nano silicon micropowder, an auxiliary agent and a latent temperature-sensitive cross-linking agent, a modification system contains a compound silane coupling agent and amino modified organosilane, and a dual network of static triple cross-linking and dynamic secondary cross-linking is formed; the nanometer silicon micro powder is of a core-micro-nano protrusion-shell multilevel structure, a shell layer is thermoplastic resin containing latent epoxy groups, and a double-peak particle size distribution design is adopted. The preparation process is realized through in-situ generation modification, high-speed shearing fusion and an embossing-shaping integrated closed-loop control process, and is adaptive to an existing fourdrinier papermaking production line. The product quantification is 210-220 g / m < 2 >, the transverse stiffness is larger than or equal to 210 mN.m, the embossing retention rate is larger than or equal to 99.5%, after 50 cycles at the temperature of-5 DEG C-40 DEG C and the humidity of 30%-80%, the stiffness is reduced by smaller than or equal to 3%, the barrier property is reduced by smaller than or equal to 6%, the printing adsorption uniformity error is smaller than or equal to 3%, and the barrier property and the environmental protection property are excellent. The method solves the problems of agglomeration, embossing resilience, multi-performance contradiction, poor environmental stability and other pain points of conventional modified filler, realizes the cooperation of low quantification and high performance, conforms to the high-end and green requirements of the tobacco industry, can pass the application of strategic emerging industry priority review channels, and has a wide application prospect.

The invention relates to an intelligent treatment method for papermaking wastewater, which comprises the following steps: S1, acquiring original operation data of a whole process, and preprocessing the original operation data to obtain a preprocessed multi-modal structured data stream; s2, constructing process interpretable features, and outputting a process interpretable feature matrix through feature selection and dimension reduction; s3, constructing a papermaking wastewater treatment knowledge graph; s4, constructing a wastewater analysis model, and obtaining a wastewater analysis result based on the process interpretable feature matrix; and S5, according to the wastewater analysis result and the papermaking wastewater treatment knowledge graph, utilizing causal reasoning to evaluate the causal influence of the strategy on the key result, eliminating potential high-risk and high-return schemes, then performing dynamic weighting on a plurality of candidate strategies by meta-learning, and combining operation preference to produce a final control strategy with an interpretable reason chain. The operation robustness and the result reliability of the wastewater treatment system are remarkably improved.

The invention relates to the technical field of agricultural paper, in particular to double anti-mite fruit cultivating bag paper and a preparation method thereof. The preparation method comprises the following steps: pulping: respectively pulping natural-color bamboo pulp and natural-color softwood pulp, then mixing, adding water, and uniformly mixing to obtain pulp; papermaking: sequentially adding iron oxide yellow, aluminum sulfate, rosin size and a wet strength agent into the pulp, adding water for dilution, and drying after papermaking to obtain fruit cultivating bag body paper; sizing: taking oxidized cassava starch, adding water, preparing starch slurry, heating, continuously stirring until the starch is completely gelatinized, taking starch gelatinized liquid, adding neem oil, putting into a high-speed homogenizing emulsifying machine, emulsifying to obtain neem oil anti-mite emulsion, uniformly mixing the neem oil anti-mite emulsion with wax emulsion to obtain anti-mite glue liquid, immersing the fruit cultivating bag body paper into the anti-mite glue liquid, and drying to obtain the fruit cultivating bag. And taking out and drying to obtain the double anti-mite fruit cultivating bag paper. The composite material has physical barrier and long-acting anti-mite functions, and the risk of insect attack invasion is greatly reduced.

The invention discloses an acid-neutral nano PHA paperboard reinforcing agent as well as preparation and application thereof, and belongs to the technical field of papermaking chemicals. The reinforcing agent is a bio-based nano water-based emulsion, and the core of the reinforcing agent is that a stable high-positive-charge nanoparticle interface is constructed under an acid-neutral window through the synergistic effect of polyphenol and an amine polymer. The environment-friendly wet strength agent solves the potential safety hazard of the traditional wet strength agent, and does not contain free formaldehyde and epichlorohydrin. The method has the outstanding advantages that the method is completely compatible with a modern papermaking acid-neutral process, and the defect that the similar bio-based technology needs to react under alkalinity is overcome; the adhesive is flexible to apply, can be efficiently used for wet end addition, or can be stably compounded with oxidized starch for surface sizing; the preparation method is simple, efficient and energy-saving, can realize excellent wet strength retention rate and dry strength improvement under the conditions of low addition amount and conventional industrial drying at 105 DEG C, and does not need extra high-temperature curing.

The invention relates to the technical field of papermaking, in particular to a paper mill wastewater recycling device which comprises a connecting base, a neutralizing tank, a settling tank and a purifying tank are sequentially arranged on the connecting base from right to left, a stirring structure is connected in the neutralizing tank, a filter screen cleaning structure is connected in the settling tank, and a filter screen cleaning structure is connected in the purifying tank. A plurality of groups of purification cotton are connected into the purification tank, water pumps are connected to the end surfaces of the neutralization tank, the sedimentation tank and the purification tank, a dosing funnel is connected to the end surface of the neutralization tank, and a sewage inlet pipe is connected to the side wall of the neutralization tank. A driving motor in the stirring structure can drive a rotating stirring blade to move up and down while rotating, drive a swinging stirring blade to swing while revolving and drive a moving stirring blade to move left and right while revolving through a transmission structure, so that the stirring efficiency is improved.

The invention relates to the technical field of papermaking, in particular to a preparation method of high-definition electronic screen protection paper. According to the method, regenerated cellulose fibers serve as main raw materials, functional composite fibers of a core-shell structure are constructed, a core layer is the regenerated cellulose fibers, a shell layer is a polypyrrole / graphene composite conductive layer, and the lasting antistatic performance is achieved; meanwhile, the surface-modified nano silicon dioxide aerogel particles are introduced, so that the optical performance and the mechanical strength are improved; then compounding with polyimide fibers modified by a silane coupling agent, adding a bio-based wet strength agent and a fluorocarbon defoaming agent, and carrying out the steps of plasma pretreatment, pulping, on-net papermaking, controllable drying, magnetron sputtering surface treatment and the like to prepare the protective paper. The obtained protective paper has the characteristics of being ultrathin, high in strength, high in light transmittance, lasting in antistatic property and the like, and is suitable for protection of high-end liquid crystal display screens and OLED screens.

The invention provides a soft extraction paper product production control system. The hardware platform comprises a central control all-in-one machine, an intelligent gateway, a folding machine, a semi-finished product paper storage frame, a cutting machine, a single packaging machine, a finished product paper storage frame, a medium packaging machine and a box filling machine. The software platform comprises a monitoring system running on the central control all-in-one machine and is provided with an adaptive feedback learning control method based on PID; according to the intelligent monitoring system, in the normal production process of a papermaking production line, firstly, an SCADA system is responsible for carrying out data acquisition on all PLCs, execution mechanisms and sensors on the production line, a WINCC control platform is responsible for data monitoring and processing, and the adaptive feedback learning control method based on PID is implemented. The control system is convenient to set, is simple and easy to use, saves manpower, improves the productivity of a papermaking production line and the market competitiveness of products, is low in comprehensive cost, and is very suitable for monitoring and control of online papermaking production line equipment.

The invention discloses a sewage treatment device for paper pulp papermaking and a treatment method, the sewage treatment device comprises a pretreatment pool, a first conveyor belt is arranged in the pretreatment pool, and the first conveyor belt is of a triangular structure; a plurality of uniformly distributed permeation holes are formed in the first conveying belt; the pretreatment pool is provided with a compression roller corresponding to the upper part of the first conveyor belt; a second conveyor belt is arranged in the pretreatment pool corresponding to the first conveyor belt; convex blocks in one-to-one correspondence are arranged at the positions, corresponding to the permeation holes, of the second conveying belt; suspended matters in sewage are quickly fished by utilizing the first conveying belt, and then the suspended matters are uniformly smeared, extruded, dehydrated and intensively collected on the first conveying belt, so that not only is the suspended matters in the paper pulp papermaking sewage quickly fished by operators facilitated, but also the sewage in the suspended matters can be treated, manpower and material resources are saved, and the working efficiency is improved. The sewage treatment efficiency is improved, the defects in the prior art are overcome, and the fiber recycling rate is increased.

The invention discloses a laser-induced lignin-derived porous carbon wave-absorbing material and a preparation method thereof, and belongs to the field of material preparation and microwave absorbing materials. The method comprises the following steps: dissolving lignin in a sodium hydroxide aqueous solution, and uniformly mixing with a polyethylene oxide aqueous solution to obtain a lignin ethylene oxide solution; the method comprises the following steps: preparing a lignin membrane by using a lignin ethylene oxide solution, performing laser irradiation, washing, performing suction filtration, and performing vacuum drying to obtain the laser-induced lignin-derived porous carbon wave-absorbing material. The lignin-derived porous carbon material prepared by taking industrial waste lignin as a raw material has the performance characteristics of being harmonious, low in density, high in reflection loss and wide in wave band absorption. The preparation method is green, environment-friendly, simple to operate and low in cost, and the waste lignin in the papermaking industry is successfully converted into a high-value adjustable functional material. The method meets actual application requirements and has huge application potential in the technical field of microwave absorbing materials.

A method of making paper and paperboard products, including absorbent structures, where the method includes mixing ultra-high molecular weight (“UHMW”) glyoxalated polyvinylamide (“GPVM”) adducts and high molecular weight (“HMW”) anionic polyacrylamide (“APAM”) with the furnish during stock preparation of a wet laid papermaking process.

The invention relates to the technical field of paper preparation, in particular to environment-friendly water-resistant paper as well as a preparation method and application thereof. The water-resistant paper is prepared by physically embossing a hydrophobic paper semi-finished product and then coating the hydrophobic paper semi-finished product with a hydrophobic coating. The hydrophobic paper semi-finished product is prepared from the following components in parts by weight: 65 to 80 parts of hydrophobic modified lignin fiber, 10 to 20 parts of an adhesive, 2 to 5 parts of a waterproof agent, 5 to 15 parts of filler, 0.05 to 0.1 part of a filter aid and 0.5 to 1 part of an antioxidant. The water-resistant paper not only has the characteristics of excellent water resistance, instant water resistance, pollution resistance, self-cleaning, no toxicity, easiness in degradation, recoverability and environmental protection, but also has firm wet mechanical strength and long service life, meets the urgent demand of the market on environment-friendly paper, conforms to the European Union laws and regulations, can also improve the additional value and profit margin of common paper, and has wide application prospects. Industrial upgrading and product differentiation competition are brought to the papermaking industry, and wide application prospects are achieved.

The invention relates to the technical field of papermaking and food packaging materials, in particular to a preparation method of full-degradable plastic-substituted high-strength food packaging paper. Preparing a fiber layer by taking plant fiber as a base material; the preparation method comprises the following steps: grafting a methyl methacrylate-butyl acrylate block copolymer on nano-cellulose through an atom transfer radical polymerization technology to prepare enhanced nano-cellulose; dialdehyde starch rich in aldehyde groups and chitosan are subjected to a Schiff base reaction to form a dynamic cross-linked network, polylactic acid microspheres modified by beta-cyclodextrin are introduced to serve as supramolecular enhancement units, and functional coating liquid is prepared; and finally, coating the functional coating liquid on the fiber layer, and drying, cross-linking and curing to obtain a finished product. Through cooperation of chemical grafting, dynamic covalent bonds and supramolecular action, the packaging paper is endowed with extremely high strength and toughness and excellent oil and moisture resistance and heat sealability, meanwhile, it is ensured that the packaging paper can be completely biodegraded in the natural environment, and functional replacement of traditional plastic packaging is successfully achieved.

The invention relates to the technical field of automatic monitoring, in particular to a papermaking filter press monitoring method based on image recognition processing, which comprises the following steps: acquiring a multi-angle original picture of a papermaking filter press, performing illumination compensation and noise elimination, optimizing the surface texture of a filter plate, performing gradient direction detection on the surface of the filter plate, and extracting contour geometric features. Identifying texture fracture and abrasion, tracking the displacement track of the filter cloth, and evaluating the association between cracks and dynamic anomalies to obtain a health evaluation table of the filter press structure. According to the method, real-time images of the surface and the interior of the papermaking filter press are collected and optimized, the recognition capability of the outline and the structure of the filter plate is enhanced, key features in the images are subjected to refined analysis, cracks and abrasion of the filter plate can be effectively recognized, the state of the papermaking filter press is accurately evaluated, and the accuracy of the papermaking filter press is improved. The shutdown time of the papermaking filter press is reduced, the service life of the papermaking filter press is prolonged, and the continuity and safety of the production process are ensured.

The invention relates to the technical field of papermaking, and particularly provides blue gray spunlace non-woven fabric base paper and a production process thereof. The raw paper comprises the following components in parts by weight: 90-120 parts of a fiber raw material, 1.5-2.6 parts of a coloring system, 6.5-13 parts of a color fixing system, 3.5-6 parts of a hydrophobic modification system and 0.5-2 parts of an auxiliary agent system. According to the invention, the mesoporous inorganic particles and bentonite in the coloring system are used for synergistically bearing the blue-grey composite dye, so that dye agglomeration is inhibited and nanoscale uniform dispersion is realized; acrylamide in the color fixing system is polymerized to form a physical network structure to construct a chemical color locking layer, so that the dye is doubly locked; in a hydrophobic modification system, liquid paraffin and stearic acid are self-assembled on the surface of the fiber to form a hydrophobic membrane, so that water dyeing is effectively prevented; all the functional components are stably distributed in the slurry and participate in curing and film forming, and the raw paper is endowed with excellent performance such as high color fastness and low decolorization rate through overall synergy.

The invention discloses a fiber synergistic copolymer as well as a preparation method and application thereof, and belongs to the technical field of papermaking chemicals and high polymer materials. Aiming at anion garbage interference caused by deepening of closed circulation of white water in the papermaking industry and green compliance challenges caused by replacing plastic with paper, the copolymer adopts a specific polycarboxylic acid and trace cationic monomer structure-effect design, and has excellent anti-interference capability and permeability. In the wet-end in-pulp enhancement, the enhancement effect of the additive can be superior to that of a traditional high-molecular-weight additive only by a relatively low addition amount, and water filtration and retention are remarkably improved; in a surface sizing and pulp molding hot pressing process, the rigidity and the water-resistant size stability of a product can be greatly improved through a unique cross-linking mechanism. According to the scheme, the industrial pain point of low enhancement efficiency in a complex environment is effectively solved, and the product does not contain organic fluorine and completely meets the requirements of environmental protection and sustainable development of a high-performance fiber-based material.

The preparation method of the environment-friendly anti-aging packaging base paper comprises the following steps: taking softwood pulp and dissolving pulp, pulping for the first time, adding microcrystalline cellulose, and stirring to form first pulp; adjusting the pH value of the first slurry to be neutral, adding a water-soluble chitosan-polyphenol compound, and pulping for the second time to form second slurry; adding oxidized sodium alginate into the second pulp, and pulping for the third time to form third pulp; forming raw paper according to a papermaking process; the invention further provides packaging base paper which has the characteristic of good anti-aging performance. Softwood pulp and dissolving pulp are used as papermaking raw materials, microcrystalline cellulose, a water-soluble chitosan-polyphenol compound and oxidized sodium alginate are used, a pulping process which is sequentially added according to a sequence is formed, a stable fiber network is constructed layer by layer, and a mechanism of skeleton supporting, covalent crosslinking and antioxidant end capping is formed. The anti-aging performance of the raw paper is improved.

The invention discloses a high-toughness carton and a preparation method thereof, and relates to the technical field of papermaking and environment-friendly packaging materials. The carton is made of a high-toughness composite corrugated board, and raw materials of the carton comprise main material pulp fibers, cross-linked modified nanocellulose, a modified starch adhesive, a wet strength agent and a rheology modifier. The cross-linked modified nano-crystalline cellulose is nano-crystalline cellulose of which the surface is grafted with a hyperbranched supramolecular cross-linking agent. According to the method, by preparing the nanocellulose with the surface grafted with the hyperbranched cross-linking agent, a mechanism capable of dissipating energy is constructed in a fiber network, and compared with the prior art, the defect that regenerated fibers are large in brittleness can be effectively overcome, and the dynamic impact toughness of the carton is remarkably improved. By using the modified starch adhesive disclosed by the invention, an adhesive layer has better ductility and interlayer binding force, and when a paperboard is stressed and deformed, the adhesive layer can be deformed along with the deformation and is not easy to break, so that the stability of interlayer binding is favorably kept.

The invention relates to the technical field of papermaking, and particularly provides glassine paper and a preparation process thereof.The preparation process of the glassine paper comprises the steps that S100, larch pulp, eucalyptus pulp, glass fibers and polyester staple fibers are mixed, TEMPO-oxidized nanocellulose is added, pulp is prepared, after the pH is adjusted to 4.5-5.2, a composite bio-enzyme system is added for stirring treatment, and after stirring treatment is conducted, the glassine paper is obtained; adding a polycarboxylic acid cross-linking agent and a catalyst for cross-linking reaction to obtain cross-linked modified slurry; s200, carrying out wet-process papermaking molding, dehydration and drying on the cross-linked modified pulp to obtain a paper blank; s300, immersing the paper blank into a Tris buffer solution of dopamine hydrochloride, coating with a sizing agent, drying and curing, and carrying out calendering treatment to obtain a paper surface; and S400, carrying out corona treatment on the paper surface, and coating a release agent to obtain the glassine paper. The glassine paper prepared by the invention has excellent heat resistance, oil resistance, tear resistance and good release performance, and is suitable for food packaging and industrial release materials.

The invention discloses a preparation method of high-color-fastness woven body paper and the high-color-fastness woven body paper, and relates to the technical field of papermaking, and the preparation method of the high-color-fastness woven body paper comprises the steps of preparing a composite dyeing assistant and preparing the woven body paper. The preparation method comprises the following steps: stirring and mixing cationic microcrystalline cellulose, sodium carboxymethyl cellulose, triethanolamine myriceate, glucan hydroxypropyl trimethyl ammonium chloride, a water-based polycarbodiimide cross-linking agent and deionized water to obtain a composite dyeing assistant, then adding the composite dyeing assistant into slurry, adding a water-based dye, and carrying out a papermaking process to obtain the composite dyeing assistant. According to the method, the color fastness of the woven body paper can be improved. The sun-proof grade of the high-color-fastness woven body paper is greater than or equal to 4 grades.

The invention discloses high-flux filter paper for water filtration and a preparation method thereof. The method comprises the following steps: by taking natural silkworm cocoons as a silk fibroin fiber raw material, preparing silk fibroin fibers through a synergistic effect of solvent dissolution and mechanical stripping; the silk fibroin fibers and the polyester long and short fibers form an interwoven network structure through a physical entanglement and electrostatic assembly technology; the silk fibroin fiber / polyester long fiber / polyester short fiber high-flux water filtering filter paper is prepared from polyester long and short fibers serving as a filtering framework and silk fibroin fibers through a wet papermaking process. The silk fibroin fiber / polyester long fiber / polyester short fiber high-flux water filtration filter paper obtained by the invention has high flux and high toughness through bionic cobweb multistage structural design, effectively filters water pollutants such as fine particulate matters and micro-nano plastic particulate matters, and is suitable for high-precision filtration in severe environments such as a cooling water system and radioactive wastewater treatment.