233results about "Dryer section" patented technology

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.

According to an aspect of the present invention, there is provided a sleeve for a drum for use in forming, pressing or moulding a fibrous web, wherein the sleeve comprises at least two parts and each part has a form of an open-ended cylinder with two edges, configured to be arranged concentrically on the drum. At least one edge of each part has a peripheral locking form, and adjacent edges of adjacent parts have corresponding cooperating peripheral locking forms adapted to lock the parts to each other.

The invention discloses high-strength high-air-permeability germinable seed paper and a preparation method thereof, and belongs to the technical field of seed paper preparation. The technical problem that the water absorption and air permeability of traditional seed paper are reduced due to addition of a chemical reinforcing agent, and then the germination rate of seeds is affected is solved. According to the technical scheme, unbleached softwood pulp is used as a raw material, after being pulped by a PFI mill, the unbleached softwood pulp is mixed with cationic lignocellulose nanofibrils and seeds which account for 4-8% of the mass of absolute dry pulp for pulping, forming is conducted through an automatic paper making system of a Kaiser method, and drying and shaping are conducted at the temperature of 40 DEG C; the cationic lignocellulose nanofibrils are prepared by the steps of grinding unbleached softwood pulp, performing alkali treatment, performing etherification reaction and performing ultrahigh-pressure homogenization. The seed paper does not need a chemical reinforcing agent, the air permeability is 17.4-18.8 [mu] m / (Pa.S), the tensile strength is 6.08-6.84 kN / m, and the relative absorptivity is 214-230%.

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 invention relates to the technical field of corrugated paper production and manufacturing, in particular to a drying cylinder and a corrugated paper production line applying the drying cylinder. The supporting piece is connected with the inner cylinder; the outer cylinder is arranged on the outer side of the inner cylinder in a sleeving manner, and the outer cylinder is connected with the inner cylinder through a connecting piece; a heating space is formed by an area enclosed by the outer cylinder, the inner cylinder and the connecting piece; the heat exchanger further comprises a partition piece arranged in the heating space, the partition piece partitions the heating space, the inner barrel is provided with a first connector and a second connector which are communicated with the heating space, and the first connector and the second connector are arranged on the two sides of the partition piece respectively, so that a medium enters the heating space through the first connector, and condensate generated by heat exchange is discharged through the second connector. After a heating medium enters and flows through the whole heating area of the heating space through the first connector, the condensed medium is discharged in time through the second connector, the heat exchange efficiency is improved, and the problem that in the prior art, a large amount of condensate water is accumulated in the heating space, and consequently the drying cylinder is low in heat efficiency is solved.

The utility model relates to the technical field of expanded paper processing equipment, in particular to expanded paper drying equipment which comprises a base, a transmission roller, a protection plate and a guide cover, a heater is arranged on the inner wall of the base, a fan is further installed in the base, the direction of airflow blown out by the fan is vertically upward, and the transmission roller is arranged on the base and can freely rotate. The bottom ends of the conveying rollers are connected with the base, the conveying rollers are vertically arranged, the conveying rollers are used for conveying expanded paper, the protection plates are located at the bottom ends of the conveying rollers, the guide covers are connected with the base, the guide covers surround the side faces of the conveying rollers, and the guide covers are matched with the protection plates, so that the expanded paper can be fully dried when air flow ascends in the expanded paper conveying process. Meanwhile, the upward airflow quickly takes away the separated water vapor to guarantee the drying effect and does not directly blow the edge of the expanded paper, the expanded paper can be protected against edge tearing, and practical significance and popularization value are achieved.

A papermaking fabric having a paper side (PS) and a machine side (MS) and being formed of a system of MD yarns interwoven with a first system of CD yarns, including first CD yarns, in a fabric weave pattern, with the fabric body including a plurality of pockets. The pockets have MD edges defined on first and second sides by floats / knuckles of one of the MD yarns and a next adjacent MD yarns, and first and second ends defined by a portion of a float or knuckle of a middle one of the MD yarns over first and second pocket end ones of the first CD yarns. At least 3 adjacent ones of the first CD yarns between the pocket end ones of the first CD yarns extend over the middle one of the MD yarns between the first and second sides. A second system of CD yarns is interwoven with the system of MD yarns, and includes second CD yarns arranged alternating with first CD yarns. At least two consecutive ones of the second CD yarns are arranged over the middle one of the MD yarns between the first and second pocket end ones of the first CD yarns. The second CD yarns reduce the amount of open spaces in the bottoms of the pockets.

A machine or apparatus for producing structured tissue or towel using a press section.

The present invention comprises a hood (11), a first gap sensor (21) and a second gap sensor (22), a hood gap adjuster (12), and a hood gap controller (30), The system receives a first input signal (S1) from the first gap sensor (21) and a second input signal (S2) from the second gap sensor (22). Determine whether the first criterion for the desired food gap is met, If the first criterion is not met, determine the desired adjustment of the hood (11), A hood gap controller (30) comprises a processing circuit (31) configured to generate a control signal (C) configured to cause a determined desired adjustment to be applied to a hood gap adjuster (12), The hood gap adjuster (12) is The processing circuit (31) receives the aforementioned control signal (C), The present invention relates to a hood adjustment assembly further configured to move a hood (11) to adjust a hood gap (hg) based on a control signal (C). The present invention also relates to a computerized method, a non-temporary computer-readable storage medium, and a method for manufacturing it.

The utility model discloses a waste heat recovery type wood pulp paper drying device which comprises a sealing box, a sliding rail is arranged in the sealing box, a heat absorption plate is fixedly connected to the top end of the sealing box, a flow guide groove is formed in the lower surface of the heat absorption plate, and a baffle is fixedly connected to the interior of the sealing box. A fan motor is fixedly connected to the interior of the sealing box and the interior of the baffle, and a fan is fixedly connected to the output end of the fan motor; a pressing plate is rotatably connected to the interior of the supporting plate, torsional springs are arranged at the two ends of the pressing plate, a handle is slidably connected to the end of the pressing plate, and a clamping groove is formed in the supporting plate. Through the components, the heat absorbing plate is arranged at the top end of the sealing box, the flow guide groove is formed in the lower surface of the heat absorbing plate, water vapor is condensed on the lower surface of the heat absorbing plate, heat in the heat absorbing plate is blown to the side edge of the baffle in cooperation with the blowing mechanism arranged above the baffle, heat circulation is achieved, and energy loss of the device is reduced.

The utility model relates to the technical field of rapid drying cylinders, one embodiment of the utility model provides a rapid drying cylinder of a toilet paper machine, the rapid drying cylinder comprises a base and a cylinder body, the cylinder body is arranged on the base through a rotating mechanism, the rapid drying cylinder further comprises a scraping plate, a driving mechanism and a rotating mechanism, the scraping plate is arranged below the cylinder body, and the scraping plate is used for scraping rust on the surface of the cylinder body; the scraping plate is arranged on the base, the driving mechanism is arranged on the base and used for driving the scraping plate to scrape rust on the surface of the cylinder body, and the rotating mechanism is arranged on the driving mechanism and used for driving the scraping plate to rotate to be close to the cylinder body. The technical problem that when water and oxygen are in contact with the cylinder body, rust is generated, and when the cylinder body is dried, the toilet paper is stained with the rust is solved.

The present invention relates to a method for manufacturing a laminate (8) comprising a paper substrate and a microfibrillated cellulose (MFC) layer. An MFC suspension containing 50 to 100% by weight of MFC is provided. A wet MFC layer (1) is formed by casting the suspension onto a metal belt support (2), and the dry content of the formed wet MFC layer (1) is 1 to 40% by weight. A paper substrate having a Gurley-Hill air permeability of less than 10,000 s / 100 ml is provided and joined to the wet MFC layer (1) positioned on the metal belt support (2) to form a laminate structure (6). The laminate structure (6) positioned on the metal belt support (2) is dewatered to form the laminate (8). The dewatering includes at least one drying step including drying by at least one non-contact drying device (7), and the metal belt support (2) is heated during at least one drying step. The present invention also relates to the laminate (8) and a packaging material comprising the laminate (8).

To provide a contamination preventing agent composition having a sufficiently excellent contamination preventing effect and its durability. The present invention is a contamination preventing agent composition to be applied to a dry part D of a papermaking process, wherein the composition is an emulsion comprising a silicone-based oil that is liquid at room temperature, an aqueous medium that is liquid at room temperature, and a dispersant for dispersing the silicone-based oil in the aqueous medium, the aqueous medium comprises water and a polyhydric alcohol dissolved in the water, the boiling point of the polyhydric alcohol is greater than 100°C, the blending ratio of the silicone-based oil to 1 part by mass of the polyhydric alcohol is 0.5 to 50 parts by mass, the blending ratio of the water to 1 part by mass of the polyhydric alcohol is 25 to 300 parts by mass, and the blending ratio of the dispersant to 1 part by mass of the polyhydric alcohol is 0.1 to 50 parts by mass.

The invention relates to reverse UV paper and a preparation method thereof. The preparation method comprises the following steps: pulping, preparing pulp, dehydrating and forming a net part, squeezing by a squeezing part, drying by a front drying part, sizing, drying by a rear drying part, calendering by a calender, coiling, packaging and warehousing. Wherein in the sizing step, gelatinized starch with the solid content of 10-12% is adopted as a sizing material, the viscosity of the sizing material is 10-20 cps, the sizing temperature is 70-78 DEG C, and the sizing amount is 3.5 g / m < 2 >-4.5 g / m < 2 >. Different from the prior art, according to the technical scheme, in the sizing step, a large amount of sizing agent adheres to the paper surface by increasing the sizing temperature and reducing the viscosity and the solid content, so that the capillary action of the paper surface is reduced, short-chain starch in the sizing agent is linked with fibers, the fibers are endowed with hydrophobic groups, the hydrophobicity of the paper surface is increased, and the paper surface hydrophobicity is improved. And the UV ink forms a floating layer on the paper surface and is rapidly cured, so that the effect of embossment three-dimensional texture is achieved.

The invention relates to a cyclone separator for separating fiber material from a fiber material-steam mixture, to a system for processing fiber material, and to a method for operating a cyclone separator, wherein the cyclone separator is designed such that a discharge of fiber material via a fiber material outlet and a co-discharge of steam via the fiber material outlet can be controlled in an improved manner. By means of a conical element which fits in the outlet space which correspondingly widens conically toward the fiber material outlet, the gap width of the annular gap between the conical element and the outlet space inner wall, which circumferentially delimits the outlet space, can be adjusted very simply via a relative movement between the conical element and the outlet end portion.

The invention relates to a web stabilizer (1) for a machine for producing webs, and is characterized in that the web (3) is sealed at the end side by means of a sealing element (6) or by means of a further sealing element (8) that can be moved relative to the web (3). The invention allows an advantageous and particularly energy-saving negative pressure design to be achieved in the field of use of the web stabilizer (1).

The invention relates to the technical field of papermaking, and provides a hot-pressing reinforcement method for fiber interface reinforcement. The method comprises the following steps: S100, in a hot pressing area, carrying out hot pressing treatment on a wet paper web to obtain an intermediate paper web; and S200, drying and shaping the middle paper web to obtain finished paper. Impulse type pressing pressure is introduced in the medium-pressure stage of hot pressing treatment and cooperates with heating, so that an interlayer bonding area is promoted to undergo periodic high-pressure compaction and low-pressure rebound, interlayer fibers are driven to be subjected to controlled rearrangement and embedment, meanwhile, directional migration and redistribution of interface moisture are promoted, and the interface moisture content is improved. Therefore, residual water films are reduced, the effective contact area is enlarged, the interlayer bonding strength is enhanced, layering is inhibited, and the problems that the interlayer bonding strength of multiple layers of paper sheets is low, and layering is prone to occurring in subsequent processing are solved.

The utility model discloses an alloy cast iron drying cylinder for papermaking production, which relates to the technical field of alloy cast iron drying cylinders, and comprises a drying cylinder body, a rotary joint is connected outside the drying cylinder body, a steam pipe is communicated inside the rotary joint, a support is arranged outside the drying cylinder body, a fixed shaft is fixedly mounted inside the support, and the steam pipe is communicated with the steam pipe. A connecting plate is fixedly mounted on the outer surface of the fixing shaft, through cooperation of a spring, a control plate and a scraper blade, the scraper blade can be pushed to be tightly attached to the inner wall of the drying cylinder body under the action of the spring, the stability of contact between the scraper blade and the inner wall of the drying cylinder body is improved, the position of one end of the spring can be adjusted through movement of the control plate, and the stability of the drying cylinder body is improved. The pushing force applied to the scraping plate by the spring can be adjusted, various using pressure requirements of the scraping plate are met, the function that the scraping plate in the drying cylinder body is dynamically attached to the inner wall is achieved, and the stability when a condensate water film is removed is improved.

The utility model relates to paper processing equipment technical field discloses a kind of processing equipment for high-temperature-resistant waterproof wrapping paper production, including rack, and the side of rack is equipped with feed inlet, and feed inlet is used to high-temperature-resistant waterproof wrapping paper into the inboard of rack;Two support plates are fixed in the inner wall of rack, and two groups of rotating rollers are rotatably connected between rack and support plate, and rotating roller is used to flatten high-temperature-resistant waterproof wrapping paper;Rack top is equipped with heating assembly, and heating assembly is used to dry high-temperature-resistant waterproof wrapping paper;Heating assembly side is equipped with connecting assembly, air is heated by electric heating wire, and hot air is blown out using fan, and several air outlets on first air outlet pipe are evenly blown to the two sides of raw material, to ensure that drying process is uniform, can quickly and effectively dry treatment to high-temperature-resistant waterproof wrapping paper kraft paper raw material, remove moisture in paper, improve production efficiency.

The application discloses a production method of a folding-resistant base paper and the folding-resistant base paper, and relates to the field of paper production. The production method comprises the following steps: mixing wood pulp, calcium carbonate fillers, cationic starch after cooking and a sizing agent to obtain mixed pulp; purifying and removing residues from the mixed pulp to obtain front pulp; adding uncooked cationic starch, hydrophobically modified starch and dry strength agent into the front pulp to obtain raw pulp; performing screening treatment on the raw pulp; performing wire-feeding treatment after the screening treatment; and performing drying after the wire-feeding treatment. In the foregoing manner, the uncooked cationic starch and the hydrophobically modified starch are added before drying, the uncooked cationic starch is gelatinized by using the subsequent drying process, and then the uncooked cationic starch forms a network structure with the hydrophobically modified starch, so that the strength and cohesion of the base paper are improved, and the folding resistance of the base paper is improved.

The invention relates to the technical field of tissue production, provides a preparation method of a high-bulkiness tissue base paper material, and solves the problem that a tissue with a stable high-bulkiness three-dimensional structure cannot be manufactured at low cost while the strength is maintained in the conventional tissue production technology. The method comprises the following steps: S1, providing a paper pulp raw material, and forming on an external forming net through a headbox to form a wet paper web; s2, transferring the wet paper web from an outer forming net to an inner forming net; s3, the wet paper web continues to be transferred to the molding structure net, and wet part wrinkling is conducted by controlling the transfer speed difference; s4, enabling the molding structure net bearing the wet paper web in the step S3 to pass through a hot air penetrating cylinder to obtain a semi-dry paper web; s5, the semi-dry paper web is transferred to a Yankee drying cylinder through a transfer roller, and final drying is conducted; by increasing the paper thickness of different parts in the paper sheet forming process and optimizing the drying process of the wet paper web, the fiber structure is looser, and the paper structure is more stereoscopic.

The utility model discloses a rapid drying and shaping device for household paper, which comprises a working box, a plurality of groups of shaping compression rollers are rotatably arranged in the working box, a conveying roller is arranged in the working box and is positioned on one side of the shaping compression rollers, and a conveying rolling shaft is arranged in the working box and is positioned on one side, far away from the shaping compression rollers, of the conveying roller; the side face of the working box is provided with a drying assembly used for conducting preliminary drying on the paper output by the shaping pressing roller. The drying assembly comprises an upper baking lamp, a lower baking lamp, a clamping module and a moving module, paper is preliminarily shaped through the shaping compression roller, the paper is moved to the position between two sets of upper clamping plates and lower clamping plates under the action of the conveying roller, and the paper is driven to the position between the upper baking lamp and the lower baking lamp through the moving module to be preliminarily dried; and the moving assembly drives the paper to move to the position above the conveying rolling shaft, the paper is dried again through the upper baking lamp and the conveying rolling shaft, and therefore the paper is rapidly dried and shaped at the same time, and the paper quality is prevented from being affected by wrinkles of the paper.

The invention discloses efficient and energy-saving type oil heating drying cylinder drying equipment, and belongs to the technical field of drying equipment. The device comprises a drying cylinder, the drying cylinder comprises a cylinder body, an oil distribution system used for spraying heat conduction oil to the inner wall of the drying cylinder is arranged in the cylinder body, the two ends of the oil distribution system are communicated with an oil guide circulation system, and the oil guide circulation system comprises an oil guide circulation pipeline, a circulation pump set and a heat exchange mechanism; the heat exchange mechanism comprises a steam heat exchange assembly used for heating the heat conduction oil and an air heat exchanger used for utilizing waste heat of the heat conduction oil. Heat conduction oil heated by the drying cylinder firstly flows through the hot air pipe, and waste heat is used for heating air entering the air hood; the air enters the air heat exchanger to heat the air to form hot air for auxiliary heating of the paper; compared with an existing oil value heating means, the energy loss is greatly reduced, and the energy consumption advantage of long-term operation is more remarkable.

To provide tissue paper excellent in softness.SOLUTION: In tissue paper containing a softener, a dry tensile strength in the longitudinal direction is 200 cN / 25 mm or more and 400 cN / 25 mm or less, and a spherical compression work is 300 mJ or less.SELECTED DRAWING: Figure 1

The utility model relates to the technical field of papermaking drying cylinders, and discloses a papermaking drying cylinder condensate water discharging mechanism which comprises a cavity formed in a cylinder body and provided with an inclined face. One end of the water pumping pipe penetrates through the left support, and the other end of the water pumping pipe penetrates through and extends into the cavity; the water suction pump is arranged at the top of the bottom plate, and the top input end of the water suction pump is connected with the water suction pipe; the lower liquid level sensor is arranged on the inner side wall of the water pumping pipe, and a bottom probe of the lower liquid level sensor is flush with the bottom end of the dormitory discharging assembly. When the liquid level rises to a probe area of the lower liquid level sensor, an electric signal is triggered to change, the controller controls the water suction pump to start, the water suction pump pumps the condensate water in the cavity out of the cylinder body through the water suction pipe, and the normal heat transfer effect is prevented from being affected. When the liquid level in the water pumping pipe drops out of the sensing range of the lower liquid level sensor, the signal of the lower liquid level sensor is recovered, and the controller immediately sends an instruction to close the water pump to prevent steam from being pumped out.

A method of forming a fibrous web including the steps of providing a fiber slurry, depositing the fiber slurry between an inner forming wire and an outer forming wire, wherein the outer forming wire comprises a structured fabric and the inner forming wire contacts a segment of a forming roll, and rotating the forming roll so that the fiber slurry moves into contact with the structured fabric.

The utility model relates to the technical field of papermaking equipment, in particular to a negative pressure paper stabilizing mechanism for a papermaking machine, which comprises a paper stabilizing box, the paper stabilizing box is of a hollow box body structure with a narrow upper part and a wide lower part, the left and right side walls of the paper stabilizing box are respectively parallel to paper surfaces on two sides, and the left and right side walls of the paper stabilizing box are also provided with adsorption ports; the number of the sealing strips is four, and the four sealing strips are located at the upper end and the lower end of the left side wall and the right side wall of the paper stabilizing box correspondingly and used for being attached to the dry net; according to the utility model, the paper stabilizing box is arranged, and negative pressure can be formed in the areas on the two sides of the paper stabilizing box, so that air between a paper surface and a dry net is adsorbed, the paper surface can be attached to the dry net, and wrinkles are reduced.