803results about "Machine wet end" patented technology

Apparatuses and processes for producing a substrate are described. A headbox is also provided. The headbox can include at least one flow section. The at least one flow section can include a constriction zone; a slice zone; an expansion zone; and a formation zone. A process for producing a web is also provided. The process can include depositing a slurry of fibers into a constriction zone. The slurry of fibers can then be flowed from the constriction zone through a slice zone and into an expansion zone. The slurry of fibers can then be flowed from the expansion zone into a formation zone. The slurry can be conveyed on a moving forming surface. Fluids may be drained from the slurry of fibers through the forming surface within the formation zone to form an embryonic web. The embryonic web may be dried.

Creped fibrous structures having pillows and knuckles, wherein the creped fibrous structures may exhibit improved knuckle properties, such as Knuckle Roughness Ra, Knuckle Roughness Rq, and Knuckle Creping Frequency and methods for making same are provided, and / or may comprise elongate knuckles comprising discrete pillows and / or elongate pillows between first and second elongate knuckles.

A process and system for adding particulate material to a flow of foam to a headbox. A particulate material feeder includes a supply chamber fillable with particulate material, a supply hopper, and an airlock valve disposed between the supply chamber and the supply hopper. The particulate material in the supply chamber is flowable into the supply hopper when the airlock valve is open. A pressure supply line coupled to the supply chamber and configured for flowing air into and / or from the supply chamber.

The present disclosure relates to a method for manufacturing a multiply paperboard on a paperboard machine. The method comprises the steps of - forming a middle-ply web from a first furnish comprising at least 20 wt% of CTMP on a first forming wire, - dewatering the middle-ply web on the first forming wire in a first dewatering zone, - dewatering the middle-ply web (3) between the first forming wire (1) and a second forming wire (6) in a second dewatering zone (5), which second dewatering zone (5) comprises at least one suction unit (7) and dewatering blades (8), which dewatering blades (8) are in contact with the second forming wire (6), and at least two loadable dewatering blades (9a, 9b, 9c, 9d) in contact with the first forming wire (1), wherein the loading pressure applied by each of the loadable dewatering blade (9a, 9b, 9c, 9d) is in the range of between 0.1 – 25 kPa -kPa, - forming a top-ply web from a second furnish and a back-ply web from a third furnish, - couching the said webs to form a three-ply web wherein the middle ply web is arranged between the top- and back ply web, - pressing the three-ply web in a press section, - drying the pressed web in a drying section and - reeling the web. The paperboard manufactured according to the present invention exhibits an excellent formation and a high z-strength.

A process and system for adding particulate material to a flow of foam to a headbox. A particulate material feeder includes a first supply hopper fillable with particulate material, a second supply hopper, and a rotary airlock valve disposed between the first and second supply hoppers. The rotary airlock valve is configured for transferring the superabsorbent material from the first supply hopper to the second supply hopper. A pressure supply line is coupled to the rotary airlock valve and configured for flowing air into and / or from the rotary airlock valve.

Binding warps have first and second binding warps arranged vertically in a pair and a third binding warp forming knuckles passing above upper surface side wefts. Upper surface side warps include an upper surface side collapsing yarn forming a pair with the third binding warp. The upper surface side collapsing yarn passes below the wefts and collapses a part of the upper surface side obverse surface texture at a position where the third binding warp forms knuckles on the wefts. The pair formed by the first and second binding warps complement each other while the pair formed by the third binding warp and the upper surface side collapsing yarn complement each other. Thereby, the pair formed by the first and second binding warps and the pair formed by the third binding warp and the upper surface side collapsing yarn form the same weaving pattern for the wefts in a weave repeat.

The present invention belongs to the technical field of special paper preparation, and particularly relates to a production method of high-strength aluminized base paper, comprising the steps of: S1, beating: respectively beating long-fiber primary pulp and short-fiber primary pulp, wherein the beating degree of the long fiber is 40-50°SR, and the beating degree of the short fiber is 20-30°SR; S2, adding additives: adding modified inorganic filler, cationic starch and retention aid to the short-fiber pulp; S3, pulp mixing: mixing the long-fiber pulp and the short-fiber pulp according to a weight ratio, and then adding modified bamboo fiber, and uniformly stirring to form a mixed pulp; S4, wire drawing and papermaking; S5, spraying a surface treatment agent; S6, paper drying, calendering and winding. The aluminized base paper obtained by the production method of the high-strength aluminized base paper of the present invention has the advantages of high strength and good smoothness.

The invention belongs to the technical field of high polymer materials, and particularly relates to a high-strength papermaking forming net fiber. Comprising the following raw materials in parts by weight: 75-90 parts of polyethylene glycol terephthalate, 5-15 parts of polybutylene terephthalate, 3-10 parts of a modified fiber filler, 2-5 parts of modified graphene, 2-8 parts of silicon dioxide, 0.5-2 parts of a silane coupling agent KH-560, 1-3 parts of an anti-hydrolysis agent, 0.5-1.5 parts of an antioxidant and 0.3-1 part of a lubricant. Wherein the modified fiber filler is prepared by sequentially carrying out modification processes such as silane coupling agent, citric acid-glycerol esterification, iron bismuth oxide loading and the like on glass fibers; the modified graphene is prepared by introducing dopamine, cerium ions and glycidyl methacrylate for modification. The mechanical strength, the hydrolysis resistance and the wear resistance of the fiber are remarkably improved through the synergistic effect of all the components and the melt spinning-multi-stage stretching process, and the fiber is particularly suitable for a forming net of a high-speed paper machine.

A process for foam forming webs is described herein. A foamed suspension of fibers is fed into a mixing chamber and then directed through a narrow constriction where the velocity of the foamed suspension of fibers is increased. From the narrow constriction, the foamed suspension of fibers enters a forming chamber which causes the foamed suspension of fibers to rapidly decrease in velocity. In one embodiment, for example, the foamed suspension of fibers undergoes a hydraulic jump resulting in significant fiber reorientation. Through the process, fiber orientation can be controlled. For example, webs can be produced that have comparable fiber orientation in the machine direction in comparison to the cross-machine direction.

Methods and apparatuses for producing a substrate are described. A method and apparatus for introducing a component into a fluid supply is also presented. A method can include providing a first fluid supply. The fluid supply can be configured as a foam in some embodiments. The method can also include providing a component feed system and a supply of the component. The method can include introducing the component to a fluid supply in an eductor in some aspects. A resultant slurry including a fluid supply and the component can be transferred through a headbox. The resultant slurry can be dewatered to provide a substrate including the component.

An industrial fabric 100 is an industrial fabric in which an upper surface side fabric composed of upper surface side warps and upper surface side wefts and a lower surface side fabric composed of lower surface side warps and lower surface side wefts are bound to each other, wherein an upper surface side warp 1Ub functions as an upper surface side binding yarn binding the upper surface side fabric and the lower surface side fabric, and a lower surface side warp 2Lb functions as a lower surface side binding yarn binding the upper surface side fabric and the lower surface side fabric. The number of knuckles formed by the upper surface side warp 1Ub in the upper surface side fabric is larger than the number of knuckles formed by the lower surface side warp 2Lb in the upper surface side fabric.

The invention belongs to the technical field of environment-friendly paper materials, and provides environment-friendly fireproof flame-retardant paper and a preparation method thereof, and the environment-friendly fireproof flame-retardant paper is prepared from the following raw materials in parts by mass: 20-40 parts of alginate fiber, 50-80 parts of bamboo pulp fiber, 5-15 parts of a flame retardant, 2-5 parts of chitosan, 1-3 parts of nano silicon dioxide and 200-400 parts of water. The alginate fibers and the bamboo pulp fibers are used as main raw materials, and the phosphorus-nitrogen environment-friendly flame retardant and the modified magnesium hydroxide are compounded, so that the dual effects of natural flame retardance and chemical synergy are achieved; according to the invention, the flame retardant and the fibers are synchronously beaten, so that nonuniformity and agent waste caused by later-stage coating are avoided; the environment-friendly fireproof flame-retardant paper is prepared from environment-friendly materials, volatile organic compounds are not discharged in the whole process, the paper can be recycled and degraded, the binding force between modified magnesium hydroxide and fibers is high, and the physical performance of the paper can be further improved.

A method of forming a fibrous web on a papermaking machine including the steps of depositing a dilute fiber slurry out of a headbox to a forming area comprising a forming surface made up of a structured fabric, wherein the structured fabric is supported by a breast roll and a forming roll, and the forming area is devoid of any additional fabrics or belts other than the structured fabric, draining the dilute fiber slurry through the structured fabric, and drying the fiber slurry.

A method of forming a fibrous web on a papermaking machine including the steps of depositing a dilute fiber slurry out of a headbox to a forming area comprising a forming surface made up of a structured fabric, wherein the structured fabric is supported by a breast roll and a forming roll, and the forming area is devoid of any additional fabrics or belts other than the structured fabric, draining the dilute fiber slurry through the structured fabric, and drying the fiber slurry.

An electronic device for determining a location of a seal strip device in a strip of a papermaking machine includes a seal strip location identification component associated with the seal strip device, a current monitoring circuit configured to measure a current through the seal strip location identification component that is associated with the seal strip device, and a location circuit configured to transmit information related to the current through the seal strip location identification component, and configured to receive an address related to the location of the seal strip device. Related methods and systems are also described.

To provide a method for producing a sheet capable of producing a sheet having sufficient strength dispensing with a resin.SOLUTION: A method for producing a sheet includes: a web-forming process of accumulating a defibrated product by a dry method to form a web; a water-supplying process of supplying water to the web; a pressurizing process of pressurizing the web supplied with water; and a heating process of heating the web supplied with water, where the water content of the web supplied with water in the water-supplying process is 12 mass% or more, the pressure applied to the web in the pressurizing process is 0.2 MPa or more, and the temperature of the web in the heating process is 100°C or lower.SELECTED DRAWING: Figure 2

A sheet manufacturing apparatus includes a defibrator that defibrates a paper piece to form a defibrated material, an accumulator that accumulates the defibrated material on a mesh belt to form an accumulating material, a forming machine that forms the transported accumulating material to produce a strip-shaped sheet, and a return mechanism that sends a residual accumulating material that is the defibrated material being accumulating to the defibrator on condition that the accumulator has stopped or is stopped during accumulation.

The utility model provides a paper pulp extrusion papermaking device, and belongs to the technical field of papermaking. Comprising a base mounting frame, a hydraulic push rod is mounted above the base mounting frame, and an extrusion head is connected to the top end of the hydraulic push rod. Through the arrangement of the processing mechanism, a worker places paper pulp needing to be extruded in the processing box in advance, the extrusion head is driven by the hydraulic push rod to extrude the paper pulp, and after extrusion processing is completed, when the worker needs to process the paper pulp splashed on the inner wall of the processing box, the extrusion head is driven by the hydraulic push rod to extrude the paper pulp. The electric push rod can be started in advance to enable the top end of the electric push rod to be connected with the scraping frame to be separated from the embedded groove formed in one side of the inner side of the storage box, and then the motor is started to enable the transmission rod and the driving gear to rotate. Therefore, the gear ring can drive the rotating ring frame fixed in the middle of the gear ring to be matched with the sliding block and the sliding frame to conduct circumferential movement in a guiding mode, and therefore the scraping frame can be indirectly driven to conduct paper pulp scraping treatment along the inner side of the containing box.

A method of forming a fibrous web on a papermaking machine including the steps of depositing a dilute fiber slurry out of a headbox to a forming area comprising a forming surface made up of a structured fabric, wherein the structured fabric is supported by a breast roll and a forming roll, and the forming area is devoid of any additional fabrics or belts other than the structured fabric, draining the dilute fiber slurry through the structured fabric, and drying the fiber slurry.

The utility model belongs to the technical field of papermaking processing, and particularly relates to a paper pretreatment device which comprises a discharging barrel fixedly arranged on one side of a pulp washing pool, the bottom of the discharging barrel is connected with a discharging port in a penetrating mode, one side of the discharging barrel is connected with an upper partition plate in a penetrating and sliding mode, and the two sides of the upper partition plate are fixedly connected with connecting rods. A connecting plate is arranged on the outer side of the discharging barrel in a sliding mode, a push plate is fixedly connected to one side of the connecting plate, the connecting rod is fixedly connected with the push plate, a lower partition plate is arranged in the discharging opening and located below the upper partition plate in a sliding mode, and one end of the lower partition plate is fixedly connected with the connecting plate; impact force of falling paper pulp is relieved through the upper partition plate and the lower partition plate, the paper pulp is prevented from directly falling on the conveying belt and splashing due to fall height, so that the processing environment is kept clean and tidy, material waste is reduced, meanwhile, water in the paper pulp can be filtered and collected to a certain degree, and corrosion caused by the fact that the water is distributed to the conveying frame is avoided.

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.

A method for coating products is provided. The method includes the steps of applying a coating liquid to a product and removing excess coating liquid from the product. It is desirable to provide a method for efficiently and reliably coating delicate or easily deformable products, such as products molded from a pulp fiber slurry. The method includes fixing the product to a receiving portion of a product carrier that is configured in the same shape as the product, such that an exterior surface of the product abuts the interior concave surface of the receiving portion of the device. A coating liquid is applied to the product in the product carrier. The product carrier is affixed to a centrifuging device and the coating liquid is dispersed over the surface of the product using centripetal force.

The invention discloses a preparation method of degradable napkin based on natural plant fibers, and relates to the field of hygienic products. According to the preparation method of the degradable napkin based on the natural plant fibers, natural cellulose raw materials such as the sisal hemp waste residues and the banana stalks are adopted, the source is wide, and the cost is low. Raw materials are cleaned, crushed and degummed to prepare crude fiber bundles, and the crude fiber bundles are converted into soft microfibrillated cellulose colloid through enzyme treatment. Defibering part of the colloid into long-fiber matrix pulp, homogenizing the other part of the colloid at high pressure to prepare short-fiber reinforced pulp, mixing the long-fiber matrix pulp and the short-fiber reinforced pulp to obtain reinforced pulp, and performing papermaking, drying and calendering to prepare the raw paper. According to the process, through fiber softening treatment, the softness and hand feeling of the paper are remarkably improved while the toughness is kept, and the process is suitable for napkin production. A green biotechnology is adopted in the whole process, the pollution load is low, chemicals are biodegradable, and the requirements for low cost and environmental protection are met.

The invention discloses a carbon fiber paper-based material and a continuous calendering enhancement method thereof. The preparation method specifically comprises the following steps: repulping, grinding, defibering and sieving meta-aramid pulp, and then mixing with defibered and dispersed short carbon fibers to prepare paper pulp; sequentially carrying out forming, dewatering, squeezing and drying treatment on the slurry to obtain a carbon fiber base paper coiled material; and carrying out continuous calendaring enhancement treatment on the carbon fiber raw paper coiled material to obtain the carbon fiber paper. According to the method, the purpose that the temperature is higher than the glass transition temperature (larger than or equal to 273 DEG C) of the meta-aramid pulp can be achieved, the purpose of conducting hot pressing on the carbon fiber base paper can be achieved, the large-batch and continuous production requirements of the carbon fiber paper can be met, and the production efficiency is greatly improved.

The utility model relates to the technical field of paper machine dehumidification, in particular to a paper machine air cover paper web outlet dehumidification device which comprises an air suction cover assembly, an exhaust pipe and an exhaust fan, the air suction cover assembly and the exhaust fan are both connected with the exhaust pipe, the air suction cover assembly is communicated with the inlet end of the exhaust pipe, and the air suction cover assembly is communicated with the outlet end of the exhaust pipe. And the exhaust fan is communicated with the outlet end of the exhaust pipe. The negative pressure type air permeability detector overcomes the defect that in the prior art, moisture escaped from the air cover paper web outlet of the paper machine interferes with the detection result of the negative pressure type air permeability detector, so that the air permeability detection result of the paper machine is not accurate, and can be used for dehumidification at the air cover paper web outlet of the paper machine. The negative pressure type air permeability detector can prevent moisture escaped from a paper machine air cover paper web outlet from interfering with detection of the negative pressure type air permeability detector, and is beneficial to improving the accuracy of paper web air permeability detection.

A method for thermally fixing a seam loop of a basic structure for a paper machine clothing, such as a seam felt of a paper machine. A flat fabric is provided with longitudinal threads and transverse threads. The flat fabric may have passed through a first thermal fixing process. The flat fabric is folded at at least one folding point to form a two-ply structure and to form a seam loop at the folding point. An electrically conductive pintle wire is inserted into the seam loop and the electrically conductive wire is heated by applying a voltage for thermally fixing the seam loop and for improving a structure of the seam loop.

A papermaking belt including zones of material laid down successively using a 3D printing process. The zones include at least a pocket zone configured to form three dimensional structures in a paper web by applying vacuum to pull the paper web against the pocket zone. In at least one exemplary embodiment, the zone also include at least one vacuum breaking zone configured to limit an amount of paper fibers pulled through the pocket zone by the applied vacuum.

This invention provides a sheet manufacturing apparatus for homogenizing the in-plane moisture content of a sheet. The sheet manufacturing apparatus manufactures sheets from a fibrous material and includes: an accumulation section that accumulates the fibrous material by an airflow to form a sheet; a sheet conveying section having a conveyor belt that contacts and holds one side of the sheet; a humidification section disposed opposite to one side of the conveyor belt and supplying moisture from the other side of the sheet; and a suction section disposed opposite to the humidification section across the conveyor belt, the suction section having a plurality of suction ports for suctioning air, the humidification section having an outlet for discharging humidified air, and a first suction port and the outlet being arranged facing each other.