1416results 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 composite can include cellulose fiber and foam binding the cellulose fiber. A method for manufacturing a composite can comprise mixing a plurality of ingredients to form a pre-foam mixture, foaming the pre-foam mixture to produce a foam, mixing the foam with cellulose fiber to form a composite material, and curing the composite material.

Web material structuring belts that impart structure to a web material during a web material structuring operation and / or structured web material forming operation, method for making same and methods for using same to make structured web materials, for example structured fibrous structures, such as structured sanitary tissue products such as structured toilet tissue, structured paper towels and structured facial tissue are provided.

The invention relates to a method and a machine for producing a fibrous web, preferably a tissue, paper or cardboard web or a nonwoven web, with a low-water raw material preparation of cellulose-containing fibers, preferably virgin pulp as bales and / or recycled fibers, into individual fibers and / or fiber bundles; wherein the individual fibers and / or fiber bundles are formed and solidified in an air stream into a planar fiber layup on a, preferably permeable, forming belt by a dry forming process; and wherein a fluid, preferably water and / or a water-additive mixture, is applied to the, preferably planar, fiber layup and the fibrous web is dried. The invention is characterized in that the total amount of fluid applied is distributed over at least two application steps.

Web material structuring belts that impart structure to a web material during a web material structuring operation and / or structured web material forming operation, method for making same and methods for using same to make structured web materials, for example structured fibrous structures, such as structured sanitary tissue products such as structured toilet tissue, structured paper towels and structured facial tissue are provided.

Disclosed are tissue products, particularly creped, wet-pressed tissue products, having improved physical properties such as a high caliper and a low degree of stiffness. The products are manufactured by molding the nascent tissue web to the structuring belt such that the pattern disposed on the fabric is imparted to the web and can be seen by the consumer in the finished product. Preferably the molding step occurs immediately prior to creping such that the molded, nascent, web is transferred from the structuring belt to a cylindrical dryer and then subsequently removed by creping. The structuring belt imparts the tissue web with a plurality of discrete molded elements arranged to form continuous, substantially cross-machine direction (CD) oriented, line elements that not only provide the products with an aesthetically pleasing appearance but also improves certain physical properties of the finished product.

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.

The invention relates to the technical field of packaging materials, in particular to a high-strength corrugated carton based on polymer fiber material processing, and particularly relates to a corrugated carton achieving high strength and high waterproofness through polymer fiber material modification and special structural design. A polymer fiber material is soaked in a sodium hydroxide solution with a certain concentration, hydroxyl groups are introduced to the surface of the fiber, and the interface bonding force between the fiber and base materials such as starch is remarkably improved. According to detection, the bonding strength of the treated fibers and starch is improved by 30%-50%, so that the overall performance of the polymer fiber material layer is enhanced, in addition, compared with traditional corrugated waveforms, the UV composite waveforms are adopted, the compressive strength is improved by 20%-30%, the buffering performance is improved by 15%-20%, external impact force can be dispersed more effectively, and objects in the carton can be protected.

Web material structuring belts that impart structure to a web material during a web material structuring operation and / or structured web material forming operation, method for making same and methods for using same to make structured web materials, for example structured fibrous structures, such as structured sanitary tissue products such as structured toilet tissue, structured paper towels and structured facial tissue are provided.

The invention provides a core material for a vacuum insulation panel, the vacuum insulation panel and a preparation method and application of the vacuum insulation panel. The core material for the vacuum insulation panel comprises aramid fibers and a binding material, and the aramid fibers comprise at least one of poly (m-phenylene isophthalamide) fibers, poly (p-phenylene terephthalamide) fibers and heterocyclic aramid fibers; the length of the aramid fiber ranges from 1 mm to 10 mm. The vacuum insulation panel comprises a core material for the vacuum insulation panel and a barrier film material, and the barrier film material wraps the core material for the vacuum insulation panel. In the process of preparing the vacuum insulated panel and the process of cutting and producing the core material for the vacuum insulated panel, dust and fine fibers are not generated, and environmental pollution and health risks are avoided.

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.

Disclosed are multi-ply tissue products, particularly creped and through-air dried tissue products, having cloth like properties, such as good drapability and durability. For example, the products generally comprise two plies and have a geometric mean slope (GM Slope) less than about 10.0 kg and a geometric mean tensile energy absorption (GM TEA) of about 15 g·cm / cm2 or greater. In certain instances, the tissue products also have a low degree of stiffness, such as a Stiffness Index less than about 5.00. The tissue products may be prepared from webs manufactured by a print-crepe process that deposits a latex polymer on at least one of the outer surfaces of the tissue web.

The invention provides a method for improving breakdown field strength and mechanical performance of insulation paper by mixing plant fibers and polymer fibers and the insulation paper. The method comprises the following steps: pulping a plant fiber pulp board to obtain plant fiber pulp; taking polymer fibers, and pulping the polymer fibers to obtain polymer fiber slurry; mixing and defibering the plant fiber pulp and the polymer fiber pulp to obtain mixed pulp; and carrying out papermaking on the mixed slurry, and then carrying out hot-pressing smoothing treatment to obtain the insulation paper. The breakdown field strength, the mechanical strength, the heat dissipation characteristic and the anti-aging characteristic of the high insulation paper can be effectively and synergistically improved.

The invention discloses a manufacturing method of degradable food packaging paper, and belongs to the technical field of food packaging paper preparation, the manufacturing method comprises the following steps: S1, separately grinding softwood pulp and hardwood pulp, and blending to obtain mixed wood pulp; s2, sequentially adding cationic starch, a strong wetting agent and a composite opacifying agent into the mixed wood pulp, and uniformly stirring and mixing; s3, water is added for diluting the mixed pulp, and a fourdrinier is used for papermaking and forming to obtain a wet paper sheet; s4, performing suction dehydration on the wet paper sheet under a vacuum condition, and then performing drying and calendaring to obtain base paper; s5, preparing a composite coating, and coating two sides of the base paper with the composite coating to form a composite coating layer; and S6, heating to cure the composite coating on the base paper to obtain the degradable food packaging paper. According to the food packaging paper, natural renewable resources serve as base paper, degradable materials are coated, and the food packaging paper has good degradability, strength, flexibility, shading effect and waterproof and oil-proof performance.

The invention belongs to the technical field of production of insulating products, and discloses a production method of an insulating paperboard, which comprises the following steps: grinding pulp through a DD720 double-disc refiner, respectively adding a modified additive PDMS (Polydimethylsiloxane) emulsion and a phenyl silicone emulsion into the pulp, mixing with a cross-linking agent, adding a cross-linking agent, and uniformly stirring to obtain the insulating paperboard. Or adding a modified additive PDMS emulsion and a phenyl silicone emulsion into the slurry at the same time, and then mixing with a cross-linking agent; mechanically stirring the mixed pulp by a propeller, standing, and carrying out drifting purification, papermaking by a paper machine, multi-section hot pressing and cutting and shaping to obtain a finished paperboard. According to the insulating paperboard prepared by the production method, the electrical strength index value of an existing product in air can be improved by 30%-50%, so that the influence of aging damage to an insulating material caused by high-voltage, high-temperature and complex electromagnetic environments in the operation process of a transformer is reduced, the service life of the transformer is prolonged, and the safe operation performance of the transformer is improved.

The invention provides a production method of high-glossiness tipping base paper for cigarettes, which comprises the following steps: step 1, pulping: selecting an appropriate coniferous and hardwood pulp variety, and mixing and pulping coniferous pulp and hardwood pulp; step 2, preparing pulp: adding cationic starch into the beaten pulp; step 3, sizing in the pulp: adding a sizing agent into the pulp to adjust and control the water absorption of the paper; step 4, manufacturing and molding, namely diluting the sizing agent after sizing and then carrying out calendering treatment; step 5, prime coating: carrying out prime coating treatment on the produced tipping base paper for the cigarettes; step 6, top coating: carrying out top coating treatment on the surface of the paper subjected to bottom coating and primary baking; 7, back application, state adjustment and calendering are conducted, and the high-glossiness tipping base paper for the cigarettes is obtained. The emulsion is prepared to form a film on the base paper, so that the glossiness of the tipping base paper for the cigarettes is improved.

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 provides a paperboard and a preparation method thereof. The preparation method comprises the steps that paper pulp is prepared, the paper pulp comprises core layer paper pulp, face lining layer paper pulp, face layer paper pulp and bottom layer paper pulp, and microfibrillated cellulose and chemical pulp are added to at least one of the face lining layer paper pulp and the bottom layer paper pulp to be ground together before grinding; making raw paper from the paper pulp; and coating surface glue on the surface of the surface layer of the body paper. According to the preparation method of the paperboard provided by the embodiment of the invention, the adding point of the MFC applied to the high-speed paper machine system is determined, the influence on the paper machine system is reduced, and dehydration of the pulp and operation of the paper machine are ensured. By combining the papermaking characteristics of a multi-layer paper machine, the surface lining layer and the bottom layer applied to the paper sheets can effectively improve the interlayer bonding strength between the paper sheets, improve TV-16, reduce the use amount of spraying starch in the conventional process or cancel the spraying starch, and improve the operation of the paper machine.

Disclosed are lagging materials for use on a driven cylindrical pulley or drum for an industrial machine. A lagging material can comprise a seaming element along the cross-machine direction (CD) of each of the opposing ends of the lagging material for forming a seam for seaming opposing ends of a lagging material when brought together. A lagging material can also comprise coatings that increase the Coefficient of Friction of a lagging material when the lagging material is installed onto the drum such that no additional adhesive is required to keep the lagging on the drum circumference when in operation. Also described is an apparatus for installing an on machine seamable lagging including at least two opposed elongate members, such that when the elongate members are drawn together, the lagging material is stretched into a seamable position to be installed on the drum.

Web material structuring belts that impart structure to a web material during a web material structuring operation and / or structured web material forming operation, method for making same and methods for using same to make structured web materials, for example structured fibrous structures, such as structured sanitary tissue products such as structured toilet tissue, structured paper towels and structured facial tissue are provided.

The present invention relates to a multi-ply liner for use as a packaging material for food or beverages, the multi-ply liner comprising a first ply and a second ply, wherein the first ply comprises at least 70 wt% unbleached kraft pulp and less than 30 wt% neutral sulfite semi-chemical (NSSC) pulp based on dry weight, and the second ply comprises at least 50 wt% NSSC pulp and less than 50 wt% unbleached kraft pulp based on dry weight, and the NSSC pulp in the second ply is a washed NSSC pulp having an ash content of less than 1.8 wt% determined in accordance with ISO standard 1762:2019. The present invention further relates to a method for manufacturing the multi-ply liner.

The invention discloses aramid nanofiber insulation paper with a self-assembled layered structure and a preparation method thereof.The preparation method comprises the steps that firstly, a modified basalt filler with ZIF-8 on the surface is prepared through a surface in-situ growth method, and then stably existing modified basalt fiber / aramid nanofiber dispersion liquid is obtained through an in-situ coating method; and finally, carrying out vacuum filtration to form the modified basalt / aramid nanofiber insulation paper with the self-assembled layered structure. The obtained insulation paper has low thermal conductivity, high breakdown strength, excellent mechanical properties and electrical insulating properties, can be used in the fields of electronic thermal management, buildings and the like, and has extremely high use value.

A paper machine clothing, in particular a seam felt for use in the press section of a machine for producing a fibrous web, wherein the paper machine clothing (1) comprises at least one basic structure and at least one layer of staple fibers or short fibers arranged on the basic structure, the at least one short fiber layer being arranged on the side facing the fibrous web and / or on the side facing the machine, wherein the paper machine clothing comprises at least one seam region in which seam loops are connected to one another by at least one plug wire to form a loop of the paper machine clothing, and wherein the at least one short fiber layer is separated in the region of the seam region by at least one cut to form a seam cover and a seam wedge, wherein at least one connecting element (20) is inserted between the seam cover and the seam wedge, wherein the at least one connecting element is connected to the short fiber material of the seam cover and / or the seam wedge in a fitting manner, in particular welded. A method for using such a paper machine clothing.

The present invention provides a method for preparing unbleached impregnated insulating paper, belonging to the technical field of insulating paper preparation. The method uses a mixture of unbleached softwood sulfate pulp and unbleached hardwood sulfate pulp as raw materials, adds a bulking agent, gelatinized cationic starch, and a wet strength agent, and adjusts the preparation process to produce unbleached impregnated insulating paper with high dry and wet strength and good liquid absorption properties.

A powder supply container includes a first case having an internal space having a columnar shape; and a second case disposed to overlap the internal space to be rotatable around a central axis of the internal space, and an opening / closing of an opening portion that opens the internal space follows a rotation of the second case.

The invention provides a viscose-based short fiber solid felt wet forming process and system, and relates to the technical field of solid felt wet forming, and the process comprises the following steps: immersing a wet felt blank into an adjustable overflow sizing tank, applying a phenolic resin glue solution, removing redundant glue solution through a stainless steel suction box, then feeding into a multi-section curing oven, and drying and curing in sections at 120-200 DEG C to obtain the viscose-based short fiber solid felt. The humidity in the multi-section curing oven is controlled to be 10%-30%. The wet felt blank is fed into a multi-section curing oven, the material gradually adapts to the curing environment in the preheating section and is prepared for subsequent curing, the main curing section is rapidly heated through a natural gas burner, the main curing process of the material is achieved, and it is ensured that the performance of the material is stably improved, and the material is slowly cooled in the cooling section, so that internal stress caused by sudden temperature drop is avoided; optimal treatment can be achieved in all stages, the product quality is effectively guaranteed, and the problems that the temperature control precision of a conventional curing oven is poor, and the material buckling deformation risk is increased are solved.

The invention relates to a dry strength composition for manufacture of paper, board or the like. The dry strength composition comprises, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content > 80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in the range of 0.1 — 1.5 meq / g, when measured at pH 2.8, and -0.1 — -3 meq / g, preferably -0.3 — -2.5 meq / g, more preferably -0.5 — -2.0 meq / g, when measured as an aqueous solution, at pH 7.0. The invention relates also to a use of the said composition and to a method for manufacturing paper, board or the like.

The invention provides a low-interception hollow paper tube, and belongs to the technical field of tobacco heating. The low-interception hollow paper tube has a multi-layer structure and comprises at least one low-interception layer and at least one heat-resistant layer, wherein the innermost layer of the multi-layer structure is a low-interception layer, and the low-interception layer comprises paper and a smoothing agent coating formed on the inner surface of the paper. The invention further provides a preparation method of the low-interception hollow paper tube and a heated cigarette. According to the low-interception hollow paper tube, interception of aerosol on the inner wall of the paper tube can be reduced, meanwhile, heat can be prevented from being transmitted to the acetate fiber filter tip section, and the lip scalding problem is avoided.