587results about "Paper-making machines" 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.

A process and system for producing nonwoven substrates are disclosed. Also disclosed is a forming surface or forming wire for producing the substrates. The forming surface includes a pattern of high porosity zones and low porosity zones. The low porosity zones have a non-zero but low porosity. A wet suspension of fibers is deposited onto the forming surface to form nonwoven substrates having areas of high basis weight and low basis weight. The low porosity zones have a width dimension that is greater than the average fiber length of at least some of the types of fibers contained in the fiber furnish to form substrates having exceptional properties, especially with respect to fluid control properties.

The invention discloses base paper for aluminum spraying and a preparation method thereof, and relates to the technical field of base paper. The preparation method comprises the following steps: pulping softwood pulp, then adding deionized water to dilute the softwood pulp until the mass concentration is 0.8%-1%, then adding modified gel particles, modified bentonite and a PAE wet strength agent, adjusting the pH value to 6.5-7.5, stirring for 40-60 minutes, and then adding deionized water to dilute the softwood pulp until the mass concentration is 0.5%-0.7% to obtain mixed paper pulp; and then making the mixed paper pulp into paper sheets, squeezing, drying, coating the surface layer coating on the surface of base material paper, and drying with hot air to obtain the body paper for aluminum spraying. According to the invention, the modified gel particles and the modified bentonite are added, so that the mildew-proof and moisture-proof capabilities of the base paper for aluminum spraying are effectively improved; the introduction of the surface coating further improves the mildew-proof and moisture-proof capabilities. Therefore, the method has a wider application prospect.

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.

To provide a sheet manufacturing apparatus with a simple configuration that reduces leftover powder. [Solution] The sheet manufacturing apparatus 1 comprises a supply unit 200 for supplying powder, a mixing unit 33 for mixing fibers and the powder to form a mixture, a deposit unit 50 for depositing the mixture to form a web W, and a molding unit 70 for compressing the web W to form a sheet. The supply unit 200 comprises a cylindrical container for storing the powder, a cylindrical inner wall 221 into which the cylindrical container can be inserted, a holding unit 220 that can contact the cylindrical container, and a drive unit 230. When the cylindrical container is inserted into the holding unit 220, the holding unit 220 and the drive unit 230 hold the cylindrical container, and the roller surface of the drive unit 230 is provided with a plurality of first protrusions 336, and the outer surface of the cylindrical container is provided with a plurality of second protrusions 317, and the plurality of first protrusions 336 and the plurality of second protrusions 317 interlock.

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 application provides a preparation method of high-conductivity carbon fiber paper and belongs to the technical field of fuel cells. The method comprises the following steps: step 1, dissolving a water-soluble polymer in water to prepare a dispersion liquid with a certain concentration; step 2, dispersing short-cut carbon fibers with a certain thickness of metal plating layer in the dispersion liquid to prepare a fiber slurry; step 3, performing wet papermaking on the slurry, and performing pressing and drying to prepare a raw paper; and step 4, performing high-temperature hot pressing treatment on the raw paper under a reducing atmosphere and a certain pressure to prepare a primary carbon paper. The prepared carbon paper has an electrical resistivity less than 3 mΩ·cm, a porosity greater than 80%, and a gas permeability greater than 2200 ml·mm / [cm 2 ·h·mm·Aq]. The application improves the electrical conductivity of the carbon paper and the gas permeability of the carbon paper, and the process is simple, and the performance of the fuel cell can be obviously improved.

The invention belongs to the technical field of nano-crystalline cellulose materials, and discloses a method for enhancing dissolved nano-crystalline cellulose papermaking. The method comprises the following steps: 1) dissolving a cellulose raw material with a solvent to obtain a cellulose solution; 2) mixing the cellulose solution with an anti-solvent, and performing nanoscale dispersion to obtain a dissolved nano cellulose dispersion; (3) washing the dissolved nano-cellulose dispersion to obtain a dissolved nano-cellulose aqueous dispersion; 4) adding the dissolved nano cellulose aqueous dispersion into the paper pulp, stirring, dispersing and homogenizing to obtain mixed pulp; and 5) performing papermaking forming on the mixed pulp to obtain enhanced paper. The method is simple, and compared with other nanocellulose, the water filtering time is effectively shortened. According to the method, the strength of the paper is remarkably improved, the problems that traditional paper is low in strength and water filtering time is long after the nano cellulose is added are effectively solved, application of the paper in the high-performance field and the industrial field is facilitated, and the application range of the paper is widened.

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.

A device and a method for weighing a roll of continuous web material on a spool at a weigh-ing station in a continuous process is described, which has fewer mechanical parts and is safer to use than prior devices and methods. The device is arranged adjacent to at least one of a pair of guide rails and comprises a damper and a load cell, wherein the load cell is integrated into at least one guide rail.

The invention provides a sheet manufacturing apparatus which reduces the supply residue of powder with a simple structure. A sheet manufacturing apparatus (1) is characterized by comprising: a supply unit (200) for supplying a powder; a mixing unit (33) for mixing the fibers and the powder to form a mixture; a stacking unit (50) that stacks the mixture to form a web W; and a forming unit (70) that compresses the material sheet W to form a thin sheet, and the supply unit (200) is provided with: a cylindrical container that stores the powder; a cylindrical inner wall (221) into which the cylindrical container can be inserted; a holding section (220) capable of coming into contact with the cylindrical container; and a driving part (230), when the cylindrical container is inserted into the holding part (220), the holding part (220) and the driving part (230) hold the cylindrical container, a plurality of first convex parts (336) are arranged on the roller surface of the driving part (230), a plurality of second convex parts (317) are arranged on the outer surface of the cylindrical container, and the plurality of first convex parts (336) are embedded with the plurality of second convex parts (317).

A process for producing a fiberboard from wood fibers and / or other lignocellulosic fibers using a wet process, in which water (9) is added to the fibers (7) to form a suspension (10) with a fiber content of 10 wt.% or less, in which the suspension (10) is pumped onto a long screen (11) and dewatered by gravity to form a fiber fleece cake (13), characterized in that the fiber fleece cake (13) is fed to a squeezer (14) and mechanically dewatered to a residual moisture content of less than 20 wt.% to form a fiber fleece (16), and the fiber fleece (16) is then transferred to a continuously operating hot press (18) and pressed there to form a fiberboard (19) under heat input.

Fibrous structures of the present disclosure may comprise discrete cells comprising one or more legs and / or one or more concavities in certain patterns or Cell Groups. The cells may be discrete knuckles or pillows and may comprise a saddle and at least two legs, where the plurality of discrete wet-formed cells may have a Cell Width, a Saddle Height, a Saddle Width, a Leg Length and a Leg Width, and where the pillow surface has a Distance Between Saddles, a Distance Between Cells, a First Leg Separation Distance, and a Second Leg Separation Distance. A ratio of a Leg Length to a Saddle Height may be between about 1.10 and about 24.0. A ratio of a Distance Between Cells to a Leg Separation Distance may be between about 0.200 and about 10.5.

A method, an apparatus, and a computer program for controlling a process for manufacturing pulp, paper, or board. Dosing of a chemical agent into a fiber suspension during the process is automatically controlled by a rule engine. The rule engine receives a plurality of measurement values related to the process and maintains a plurality of rule sets including an active rule set. Each rule set defines how the dosing depends on the measurement values. The rule engine controls the dosing of the chemical agent based on the measurement values and the active rule set, records at least a part of the measurement values and the actual dosing amount of the chemical agent, and receives at least one rule set candidate. Based on the previous measurement values, the dosing of the chemical agent is simulated using the received at least one rule set candidate, and a simulation result for optimizing the performance of the chemical agent in the process is output.

The invention relates to absorbent paper as well as a preparation method and application thereof. The method comprises the following steps: pulping plant fiber pulp, adding sodium bicarbonate for pretreatment, and washing to obtain pretreated paper pulp; adding a dispersing agent, a wet strength agent and a composite antibacterial component into the pretreated paper pulp, and uniformly mixing to obtain mixed paper pulp; the composite antibacterial component is prepared from chitosan, polylysine and a modified copper oxide dispersion liquid; feeding the mixed paper pulp into a rotary screen paper machine to produce upper-layer single-layer wrinkling base paper, then compounding the upper-layer single-layer wrinkling base paper with lower-layer single-layer semi-forming base paper on which the macromolecular water-absorbent resin particles are scattered, and then drying to obtain the water-absorbent paper. The antibacterial rate of the absorbent paper on various pathogenic bacteria is larger than or equal to 99.5%, the antibacterial rate is still larger than or equal to 97% after 20 times of water washing, and the absorbent paper is high in water absorption speed, stable in physical performance, safe, environmentally friendly, controllable in cost, capable of being widely applied to the fields of hygienic products, medical dressings, food packaging and the like, simple in preparation process and suitable for industrial production.

The embodiment of the invention provides a preparation method of cotton-feeling household paper, which comprises the following steps: providing long fibers and short fibers in a specific ratio, and controlling the dry weight ratio of bamboo pulp in mixed pulp to be 20-40%; the pulp is subjected to tandem type two-stage pulp grinding treatment, the specific energy consumption of the first stage is 30-50 kWh / adt, and the specific energy consumption of the second stage is 150-170 kWh / adt; sequentially adding a wet strength agent and a softening agent; and finally, forming, squeezing, drying and carrying out wrinkling treatment with the wrinkling rate of 22-26% to obtain the raw paper, through cooperation of the processes, the problem that high wet strength and high softness of the bamboo-based household paper are difficult to consider at the same time is solved, the wet-to-dry ratio of the prepared product is larger than or equal to 32%, the softness is smaller than or equal to 110 mN, and the product has the wet durability of cotton-like soft towels and the softness of high-end household paper.

A method of producing a corrugated product is provided and includes adjusting a moisture content in a first face-sheet web to a first range of greater than 10 wt. % and up to 30 wt. % and adjusting a moisture content in a web of medium material to said first range. The method further includes forming the web of medium material into a corrugated web and bonding the first face-sheet web to a first side of the corrugated web.

The invention provides bamboo reed bleached fluff pulp as well as a preparation method and application thereof, and belongs to the field of papermaking. According to the characteristics of low bonding strength and small bursting strength of the arundo donax short fibers and parenchyma cells, the use of chemicals such as a debonding agent and the like is canceled, the preparation process is different from a traditional bamboo fluff pulp preparation process, the components of the arundo donax short fibers are reserved, the three-dimensional structure of the arundo donax bleached fluff pulp fibers is optimized, the water absorption and water retention capacity of the fluff pulp is improved, and meanwhile, the paper pulp yield is optimized. According to the raw material characteristics of the bamboo reed, the process conditions of prehydrolysis, cooking and bleaching are optimized, and an economical and efficient bleached fluff pulp product of the bamboo reed pulp is produced, so that the method has good practical application value.

The invention belongs to the technical field of papermaking, and particularly relates to high-strength corrugated base paper and a production method thereof. The method comprises the following steps: respectively preparing waste paper pulp and natural color chemithermomechanical pulp with 20-35-degree SR beating degree through independent preparation lines; then, mixing the two kinds of pulp in a drifting system according to the proportion of 20-50% of natural color chemimechanical pulp, and adding a ternary retention aid composed of cationic retention aids polyacrylamide with the molecular weight of 8-10 million and cationic retention aids polyacrylamide with the molecular weight of 3-6 million and bentonite; and finally, the mixed pulp is put on a net to be formed, surface sizing is conducted on paper sheets, and sizing paint comprises corn starch, starch converting enzyme, styrene acrylate emulsion, AKD emulsion and aluminum sulfate. Through the synergistic effect of branching pulping, proportion optimization, a special chemical system and surface treatment, high-proportion waste paper replacement is achieved, meanwhile, the paper forming strength is guaranteed and improved, the production cost is effectively reduced, and remarkable economic benefits are achieved.

The present application relates to a kind of glass fiber filter paper and its preparation method and application.The glass fiber filter paper includes at least three layers of glass fiber layers, and the glass fiber layers between layer and layer are gradient arrangement;Three layers of the outer layer of the glass fiber layer is combined with non-woven fabric layer.The method includes: according to the proportion, at least three kinds of glass fiber, dispersing agent and water are uniformly mixed, and at least three kinds of glass fiber slurry are obtained;At least three kinds of glass fiber slurry are formed on the non-woven fabric laid on the paper forming net, and the glass fiber paper film is formed, is pressed and is initially dried, and at least three layers of dry paper film are obtained;At least three layers of paper film are released at the same speed, at the same time, the non-woven fabric on at least one middle layer paper film is removed, then at least three layers of paper film are glued and combined, and adhesive curing is carried out.The technical problem to be solved is how to make the thickness of glass fiber filter paper less than 0.5mm, the filter material quality less than 110g / m 2 , the breaking strength is higher than 210kPa, while the pollution capacity is higher than 160g / m 2 , and the filtering precision is better than β (10 μm) greater than 300.

The invention provides mildew-proof decorative paper as well as a preparation method and application thereof, and relates to the field of mildew-proof decorative paper. The preparation method of the mildew-proof decorative paper comprises the following steps: preparing a core-shell composite particle dispersion liquid, preparing a mildew-proof agent, and mixing and manufacturing paper with pulp. According to the preparation method of the mildew-proof decorative paper, the problem that the whiteness, the opacity, the mechanical strength and the weather resistance of the mildew-proof decorative paper are influenced by directly adding the mildew preventive can be effectively avoided, and the whiteness, the opacity, the mechanical strength and the weather resistance of the mildew-proof decorative paper are effectively improved; and the surface smoothness, the veneer glue penetration grade, the veneer peel strength and the water-resistant and mildew-proof performance of the veneer artificial board prepared from the wood-plastic composite material are further improved.

The invention belongs to the technical field of papermaking, and particularly relates to multilayer anti-counterfeiting medium frame paper and a preparation method thereof. The invention aims to solve the problems of poor interlayer bonding force and interface separation risk of the current anti-counterfeiting paper. Raw paper is prepared in three layers through a multi-layer composite technology, the first layer and the third layer use outer layer paper pulp, the second layer uses inner layer paper pulp, and the safety line is embedded into the second layer. Wherein the inner-layer paper pulp comprises Manila hemp pulp, polyvinyl alcohol fibers and low-melting-point hot melting fibers; the outer-layer paper pulp comprises short velveteen fibers and high-melting-point hot melting fibers. Wet raw paper prepared by a multi-layer compounding process is subjected to squeezing compounding and step-by-step drying to obtain raw paper, and the raw paper is further coated with a composite coating and then subjected to hot press polishing treatment to obtain the multi-layer anti-counterfeiting medium frame paper. The multilayer anti-counterfeiting medium frame paper prepared by the method is good in interlayer binding force, excellent in watermark keeping effect and good in anti-counterfeiting compatibility.

The invention belongs to the technical field of papermaking, and particularly relates to a process for improving blister fastness of a blister card. Comprising the following steps: treating needle and hardwood pulp with compound enzyme, adding light magnesium oxide, grinding to obtain compound modified pulp, preparing three layers of pulp, diluting and purifying, adding auxiliaries into a three-layer slushing pump before purifying, and adding core layer auxiliaries containing hydroxymethyl urea modified cationic polysaccharide and the like into a core layer pump; the three layers of pulp are compounded into a wet paper web layer by layer through an upper net of a headbox, gradient pre-drying is performed after multiple times of squeezing dehydration, and then surface sizing, post-drying, hard calendaring, front and back coating and soft calendaring are performed in sequence to obtain a finished blister card product. The process effectively solves the problems of infirm blister and shelling in narrow-edge blister processing, realizes standardized control of slurry quality, greatly reduces batch-to-batch difference of blister effects, remarkably improves the binding force of a narrow-edge blister area, optimizes the surface performance of paper, reduces the phenomena of linting and powdering during printing, and improves the printing quality of the narrow-edge blister blister. And the printing adaptability is improved.

The papermaking gas hood device with the dehumidification function comprises a base, the top of the base is fixedly connected with a hollow column, the top of the hollow column is provided with a sliding column in a penetrating mode, the sliding column is in sliding connection with the hollow column, the hollow column is provided with a limiting mechanism, the top of the sliding column is provided with a lead screw in a penetrating mode, and the lead screw is rotationally connected with the sliding column. The top of the lead screw is fixedly connected with a handle, the outer wall of the lead screw is sleeved with two sliding blocks in threaded connection with the lead screw, the two sliding blocks are both in sliding connection with the sliding column, the side wall of each sliding block is fixedly connected with a connecting rod, and the two connecting rods are both fixedly connected with a gas hood body. The height of the two gas hoods can be adjusted through the limiting mechanism, the distance between the two gas hoods can be adjusted by rotating the handle, and different use requirements are met; convection is formed through the two gas hoods, one is used for heating and drying, and the other one is used for dehumidifying, so that the paper drying effect is good.

The invention discloses a method for preparing coffee filter paper by taking coffee grounds as filler, and belongs to the technical field of papermaking. The preparation method comprises the following steps: drying, crushing and sieving coffee grounds, and carrying out ultrasonic dispersion on sieved powder to prepare coffee grounds suspension; the method comprises the following steps: defibering wood pulp, mixing the defibering wood pulp with a wet strength agent solution, a retention and drainage aid and a coffee residue suspension, and then carrying out papermaking, squeezing, drying and water balance treatment to obtain the coffee filter paper. The waste coffee grounds are used as the functional filler, so that the efficient utilization of wastes is realized, the phenomena of resource waste and environmental pollution are reduced, the process is simple, and the preparation cost is low.

The present invention relates to a device and a method for producing a nonwoven fabric with a non-isotropic fiber orientation, i.e., a fiber orientation that is directional, unlike classical random lay-ups where an isotropic fiber orientation prevails.

The invention relates to an aroma-carrying multifunctional paper-based material and application thereof, and the aroma-carrying multifunctional paper-based material is prepared by a method comprising the following steps: reacting a carboxylic acid aroma substance with a chlorination reagent to prepare an acyl chloride derivative; the carboxylic acid flavor substance is p-methoxycinnamic acid or a combination of cinnamic acid and p-methoxycinnamic acid; mixing the obtained acyl chloride derivative with plant pulp and a catalyst, and carrying out esterification reaction to obtain carboxylic acid flavor substance grafted plant pulp; and making paper by taking the obtained carboxylic acid aroma substance grafted plant pulp as a raw material to obtain the aroma-carrying paper-based material. Specific carboxylic acid flavor substances are firmly connected to a plant fiber skeleton in a covalent bonding manner, so that long-acting slow release of fragrance can be realized, and the problems of easiness in volatilization, short fragrance retention time and the like in a traditional physical adding manner are effectively solved; meanwhile, the physical characteristics and combustion characteristics of the paper-based material prepared from the chemically modified cellulose are also optimized and improved, so that an idea is provided for developing a novel functional paper-based material.

The invention discloses a preparation technology of yak manure and plant fiber composite Tibetan paper, and relates to the technical field of composite Tibetan paper preparation, and the preparation technology comprises the following steps: screening dried yak manure, removing pebbles and hair impurities, soaking in clear water, and scrubbing to obtain a yak manure material; the yak manure material is placed in a high-temperature steam environment of 100 DEG C or above for continuous sterilization for 30 min, and then mechanical crushing treatment is performed to obtain short-fiber-shaped yak manure crude fiber pulp; the method comprises the following steps: cleaning radix euphorbiae lantu roots and / or branches and barks of daphne odora, and extracting plant long fibers by adopting a mode of combining soaking, beating and tearing, or cooking and treating the radix euphorbiae lantu roots or the branches and barks of daphne odora by adopting a mild alkaline method to obtain traditional plant long fiber pulp; the short-fiber-shaped yak manure crude fiber pulp and the traditional plant long fiber pulp are put into a pulp mixing pool according to the mass ratio of 40%-60%: 30%-50%, the mass ratio of the yak manure crude fiber pulp is preferably 70%-90%, and the aim that the raw materials basically come from the Qinghai-Tibet Plateau is achieved.