1072results 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.

The invention relates to a papermaking wastewater fiber recovery device which is characterized in that a main water distribution channel positioned at a high position is butted and communicated with a plurality of branch water channels below through a main water distribution hole in the bottom, two rows of vertical water distribution lattice walls are arranged in each branch water channel along the length direction and divide the branch water channel into a middle chamber, a left chamber and a right chamber, and the main water distribution hole is opposite to the middle chamber; the bottom of the water distribution lattice wall is provided with an overflowing channel, the middle cavity is communicated with the left cavity and the right cavity, the weir crest portions on the two sides of the water distribution canal are provided with vertical water uniformizing plates, the outer side of the weir crest is provided with a net frame inclining downwards, inclined net cloth is laid on the net frame, and the bottom end of the net frame is provided with a horizontal chute bottom plate in the length direction. A vertical chute baffle is arranged on the extending outer side of the chute bottom plate in the length direction, and a collecting groove used for collecting fiber agglomerates is formed. Wastewater uniformly flows through the water passing surface of the inclined net, fibers are efficiently intercepted on the inclined net surface and form fiber bundle clusters to roll down under the action of inlet water washing and gravity, and slurry-water separation is realized through the action of gravity in the whole process.

The invention relates to a covering (10) for a machine for producing a fibrous web, in particular a paper, cardboard or tissue web, wherein the covering (10) is essentially formed from a perforated substrate (20) and has the form of an endless strip extending in a longitudinal direction, with a first side edge (26) and a second side edge opposite the first side edge (26), wherein an unperforated first edge protection strip (48) extending in the longitudinal direction of the covering (10) is provided immediately adjacent to the first side edge (26) and wherein an unperforated second edge protection strip extending in the longitudinal direction of the covering (10) is provided immediately adjacent to the second side edge, wherein the first edge protection strip (48) and the second edge protection strip each have a width between 1 mm and 5 mm, preferably between 1 mm and 3 mm.exhibit and are coated with a protective layer (52), wherein the respective protective layer (52) extends in the width direction (WD) of the covering (10) beyond the unperforated first edge protection strip (48) or the unperforated second edge protection strip into a perforated area of ​​the substrate (20), wherein the material of the protective layer (52) projects at least partially into passage channels (30) of the perforated area and forms a form-fitting connection with the substrate (20) there.

The utility model discloses papermaking residue recycling equipment, and relates to the technical field of papermaking device.The papermaking residue recycling equipment comprises a base and a working mechanism, the upper end of the base is fixedly connected with the working mechanism, the working mechanism comprises a wastewater treatment assembly fixedly connected to the upper end of the base, and the outer side of the wastewater treatment assembly is fixedly connected with a water storage assembly; according to the papermaking residue recycling equipment, through the arrangement of the working mechanism, during use, the design of the working mechanism of the papermaking residue recycling equipment embodies the concepts of environmental protection and resource recycling, the influence of the papermaking industry on the environment is effectively reduced, and through the wastewater treatment assembly and the water storage assembly, the papermaking residue can be recycled. The equipment can reduce wastewater discharge and recycle water resources, meanwhile, the fixed protection assembly ensures the safety of operators, the heat dissipation assembly and the treatment assembly work cooperatively, the heat efficiency and the treatment capacity of the equipment are improved, and stable operation of the equipment is ensured.

A structured tissue belt assembly including a supporting layer, a non-woven web contacting layer, and one or more laser welds that attach the bottom surface of the web contacting layer to the top surface of the supporting layer. The structured tissue belt assembly allows for air flow in x, y and z directions. In exemplary embodiments, the structured tissue belt assembly has an embedment distance between the supporting layer and the web contacting layer of 0.05 mm to 0.60 mm and a peel force between the web contacting layer and the supporting layer of at least 650 gf / inch.

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.

A sheet manufacturing apparatus includes a buffer tank 13 that stores a material containing fibers; a defibrator 30 that defibrates the material supplied from the buffer tank 13 and discharges the fibers; a mixing unit 91 that mixes the fibers and a binding material binding the fibers to each other and discharges a mixture; a first transport belt 61a that transports the mixture; an accumulation unit 50 that accumulates the mixture on the first transport belt 61a to form a web W; a second transport belt 62a that comes into contact with one surface of the web W to transport the web W; processing rollers 71 and 72 that pressurize the web W; a cleaning unit 201 that removes and recovers residual fibers adhering to the first transport belt 61a; and a fiber transport pipe 22 that transports the residual fibers recovered by the cleaning unit 201 to the defibrator 30.

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 sheet manufacturing apparatus includes a buffer tank 13 that stores a material containing fibers; a defibrator 30 that defibrates the material supplied from the buffer tank 13 and discharges the fibers; a mixing unit 91 that mixes the fibers and a binding material binding the fibers to each other and discharges a mixture; a first transport belt 61a that transports the mixture; an accumulation unit 50 that accumulates the mixture on the first transport belt 61a to form a web W; a second transport belt 62a that comes into contact with one surface of the web W to transport the web W; processing rollers 71 and 72 that pressurize the web W; a cleaning unit 201 that removes and recovers residual fibers adhering to the first transport belt 61a; and a fiber transport pipe 22 that transports the residual fibers recovered by the cleaning unit 201 to the defibrator 30.

The utility model discloses a papermaking headbox which comprises a headbox body, a pulp discharge valve is arranged at the lower end of the headbox body, a support plate is fixedly connected to the side wall of the headbox body, the upper end of the headbox body is covered with a top cover, a guide rod is arranged at the upper end of the top cover and penetrates through the support plate, and the support plate is fixedly connected with the headbox body. A homogenizing device is arranged on the bracket plate and can be inserted into the headbox, and a lifting driving device is arranged on the bracket plate and is connected with the top cover. The utility model belongs to the technical field of headboxes, and particularly relates to a papermaking headbox which solves the problem that in the prior art, a stirring rod in the headbox cannot be conveniently separated from the headbox to be detached or cleaned.

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 present invention relates to industrial fabrics such as patterned belts used to generate three-dimensional structures in products produced thereon, for example in the papermaking field, for textile products, and in nonwoven processing. The present invention relates to patterned belts that can be provided with endless, various, complex patterns using discretization, for example, where the individual subunits comprising the pattern elements are not connected and therefore do not act as stress-bearing members of the patterned belt.

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 dewatering box cover including a main body having a leading edge, a trailing edge opposite the leading edge, a first side edge, a second side edge opposite the first side edge, a top surface, and a bottom surface and a plurality of sets of holes formed within the main body. The holes within each set are aligned with one another along an imaginary line that is angled from 30° to 70° relative to horizontal and the holes extend downwards from the top surface of the main body towards the bottom surface of the main body at an angle of 20° to 45° relative to vertical.

The present application discloses a headbox for papermaking, comprising a base for providing support force, a pulp discharging mechanism arranged on the base and used to assist pulp to be sprayed onto a paper forming net, the pulp discharging mechanism comprising a pulp discharging box, an upper lip plate and a lower lip plate are arranged inside the pulp discharging box, a lip for pulp discharging is formed between the upper lip plate and the lower lip plate, a pulp discharging mechanism for extracting excess accumulated pulp is arranged on the side of the pulp discharging box near the lip, a scraper for blocking excess pulp is connected to the side wall of the pulp discharging box, the pulp discharging mechanism comprises a bottom plate, a vertical plate is fixedly connected to the bottom plate, a plurality of transmission components for taking away excess pulp are arranged between the bottom plate and the scraper, the transmission components comprise a plurality of rollers, the same group of rollers are connected to the same belt for transmission, a water bucket for containing pulp is fixedly connected to the side of the belt away from the roller, and a driving mechanism for driving the roller to rotate is arranged in the extraction groove. The pulp accumulation is reduced, and the influence on paper forming is reduced.

The embodiment of the invention provides manufacturing equipment for non-woven fabrics capable of being dispersed, which is used for manufacturing the non-woven fabrics capable of being dispersed and comprises a forming unit, the forming unit comprises a headbox and a forming net, the forming net comprises a forming section, the headbox comprises a lip plate, and the lip plate comprises a first upper lip plate and a second upper lip plate. The forming section comprises a first forming section corresponding to the first upper lip plate and a second forming section corresponding to the second upper lip plate, the second upper lip plate is parallel to the second forming section, a first forming area is arranged between the first upper lip plate and the first forming section, and a second forming area is arranged between the second upper lip plate and the second forming section. The second upper lip plate further comprises a micro-pore plate facing the second forming area and an upper cavity located above the micro-pore plate, the micro-pore plate comprises a plurality of micro through holes communicating the upper cavity with the second forming area, and the upper cavity is in a positive pressure state. Furthermore, fish scale lines formed on the wet fiber web by the slurry are reduced, and the product quality is improved and stabilized.

A method for cleaning a belt of a through air drying papermaking machine in which a high pressure shower is configured to traverse across a width of the belt of the papermaking machine while ejecting water onto the belt, and a vacuum box is operatively connected to the high pressure shower. The high pressure shower has a width that is less than a full width of the belt.

To provide a sheet manufacturing apparatus capable of suppressing waste of raw materials.SOLUTION: A sheet manufacturing apparatus includes: a buffer tank 13 that stores materials containing fibers; a defibrator 30 that defibrates the materials supplied from the buffer tank 13 and discharges the fibers; a mixing section 91 that mixes the fibers with a binder that binds the fibers to each other and discharges the mixture; a first conveyor belt 61a that conveys the mixture; a deposition section 50 that deposits the mixture on the first conveyor belt 61a to form a web W; a second conveyor belt 62a that comes in contact with one side of the web W to convey the web W; treatment rollers 71, 72 that apply pressure to the web W; a cleaning section 201 that removes and collects remaining fibers adhering to the first conveyor belt 61a; and a fiber conveyor pipe 22 that conveys the remaining fibers collected by the cleaning section 201 to the defibrator 30.SELECTED DRAWING: Figure 1

The utility model discloses a headbox for processing composite non-woven fabrics, which comprises a base, a first box body is fixed at the top of the base, a first motor is mounted on the side surface of the first box body, an output shaft of the first motor is inserted into the first box body and is connected with a homogenate roller, a second box body is fixed at the top of the first box body, and the second box body is connected with the homogenate roller. A cover plate is fixed in the second box body, and a sliding groove is formed in the top of the cover plate. Compared with the prior art, the adjusting mechanism and the stirring blades are arranged in the second box body, the stirring blades are driven to reciprocate in the second box body along the axial direction of the reciprocating screw rod while the adjusting mechanism is used for driving the stirring blades, and the slurry is stirred while the slurry is stirred by the slurry homogenizing roller, so that the slurry homogenizing efficiency is improved. The slurry can be fully and uniformly mixed, the stirring effect is improved, and the use is very convenient.

The invention discloses a waste paper papermaking method capable of improving the cyclic utilization rate of white water, and relates to the technical field of waste paper papermaking. The tailings treated by the clarifier are recycled and used for preparing white water; in a papermaking workshop, white water is recycled through an off-machine white water tank; in a pulping workshop, a multi-disc fiber recycling machine is adopted for grading redundant white water in the workshop; the ultra-clear white water is filtered by a super-filter and then is used for a net part low-pressure spraying system and a pressing part low-pressure spraying system of a papermaking workshop; reusing the turbid white water into a pulper for pulping so as to recover fibers in the white water; and in a wastewater workshop, the wastewater subjected to anaerobic and aerobic treatment is treated by an ultrafiltration membrane and a reverse osmosis membrane. And through a four-stage recycling technology, the cyclic utilization rate of the white water in the waste paper papermaking workshop is increased to 97% or above.