621results about "Dryer section" patented technology

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 method of producing a paper or paperboard product having at least one ply comprising high yield pulp (HYP), comprising the steps of: – providing a furnish comprising at least 50% of high yield pulp (HYP) of a total pulp content in said furnish, said high yield pulp being produced with a wood yield above 85%; – dewatering the furnish to form a moist web and pressing said moist web to a dry solids content of at least 40–70%; and – densifying the moist web to a density above 600 kg / m3 in a press nip of a paper machine at a temperature above a softening temperature of water-saturated lignin comprised in said high yield pulp to provide a paper or paperboard product, containing at least 30% high yield pulp (HYP) of a total pulp content of said product.

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 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.

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 relates to a machine (1) and a method for producing or treating a fibrous web (F), in particular a paper, board or tissue web (F), comprising at least one machine section (2, 3, 4), preferably a dryer section (2, 4) or forming section (3), at least one thermal-energy load, preferably a steam and condensate system (5) and / or a secondary system load (70, 71, 82), and at least one thermal-energy recovery system (6), wherein a heat pump (90) extracts residual thermal energy from an exhaust-air flow of at least one exhaust-air line (84, 84') from at least one machine section (2, 3, 4) and, being additionally fed electrical energy (80), feeds thermal energy to the at least one thermal-energy load (5, 70, 71, 82), preferably to a condensate of the at least one condensate return line (58). According to the invention, the heat pump (90) is disposed in the exhaust-air line (84) such that the heat pump (90) recovers the residual thermal energy before a dew point temperature of the exhaust-air flow in the exhaust-air line (84, 84') is reached, and the steam and condensate system (5) comprises a steam accumulator (54) for storing the steam, said steam accumulator being downstream of the heat pump (90).

The utility model discloses novel drying equipment for transfer paper production, and particularly relates to the related technical field of transfer paper production, the novel drying equipment comprises a shell, a winding roller and an unwinding roller, the winding roller and the unwinding roller are both rotatably arranged in the shell, a drying mechanism for drying transfer paper is arranged in the shell, and the winding roller and the unwinding roller are arranged in the shell. A motor drives a rotating shaft to rotate, the rotating shaft drives an eccentric wheel and a rotating rod to rotate, the rotating rod can drive a swing rod to swing through a pin shaft, the swing rod drives two sets of rolling wheels to move on the surface of transfer paper through a communicating plate, and the transfer paper can be rolled and dried; and meanwhile, wind power generated by a draught fan can be conveyed into a communicating plate through a hose and then conveyed into a rolling wheel through the communicating plate, local drying treatment can be conducted while the transfer paper is rolled, and the phenomenon that the drying effect of the transfer paper is affected due to the local uneven heating phenomenon is avoided.

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).

The present invention relates to a tissue paper machine (100) comprising - a forming section (101), - a drying section (102) comprising a Yankee dryer (20) and a non-dewatering transfer nip formed (TN) between the Yankee dryer (20) and a press assembly (30) for transferring the paper web (W) from the structured fabric (10) to the Yankee dryer (20), - a structured fabric (10), wherein the transfer nip (TN) is an extended press nip, the press assembly (30) comprising a press shoe (31) and an actuator (60) configured to operate the press shoe (31) to form the transfer nip (TN), and wherein the actuator (60) is configured to generate a desired linear load in the transfer nip (TN) by operating the press shoe (31) to extend into the transfer nip (TN) with a desired pressure and to change the linear load during operation of the tissue paper machine (100).

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 invention discloses a nano boron nitride composite meta-aramid paper-based insulating material and a preparation method thereof, and relates to the technical field of insulating materials. The preparation method comprises the following steps: respectively dispersing meta-aramid fibrid and meta-aramid chopped fiber into fibrid slurry and chopped fiber slurry, mixing, adding hexagonal boron nitride nanosheet dispersion liquid and a retention aid for reaction to obtain uniform composite slurry, and shaping to obtain the nano boron nitride composite meta-aramid-based insulating material. The material is well matched with dielectric constant transformer oil, the dielectric loss is still at a lower level, meanwhile, the characteristic breakdown strength and the heat conductivity are synergistically improved, and the multifunctional requirements of high-power electrical equipment for insulating materials are met.

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 is provided that contains 25 to 90% by weight of MFC and 10 to 50% by weight of a filler component. The suspension has a dry content of 2.5 to 50% by weight. A wet MFC layer (1) is formed by casting the suspension onto a metal belt support (2). A paper substrate having a Gurley Hill air permeability of less than 10000 seconds / 100 ml is provided and joined to the wet MFC layer positioned on the metal belt support to form a laminate structure (7). The laminate structure positioned on the metal belt support is dewatered to form a laminate. The dewatering includes at least one drying step that includes drying by at least one non-contact drying device (9), and the metal belt support is heated during at least one drying step. The present invention also relates to the laminate and a packaging material comprising the laminate.

The utility model belongs to the technical field of papermaking, and particularly relates to a drying machine for paper processing, which comprises a machine base, and a drying cylinder, a dosing mechanism and a medicine receiving groove are arranged on the machine base. The two ends of the drying cylinder are rotationally arranged on the machine base. The dosing mechanism is arranged at the side part of the drying cylinder, is positioned on one side where paper is forwards conveyed out of the drying cylinder and is used for regularly spraying a stripping agent to the drying cylinder; the medicine receiving groove is used for receiving the stripping agent dripping from the drying cylinder, is in a circular arc shape and is coaxially arranged below the drying cylinder. The stripping agent dropping from the drying cylinder can be received through the agent receiving groove, and the stripping agent thrown out from the surface of the drying cylinder due to the centrifugal effect after the agent adding mechanism sprays the stripping agent to the drying cylinder can be received through the position distribution of the agent receiving groove and the agent adding mechanism, so that the stripping agent is prevented from splashing and being wasted.

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.

The utility model relates to a low-energy-consumption hot air balance system for drying toilet paper, which comprises a drying cylinder, a hot air cover, a hot air system and a steam system. The hot air cover is arranged above the drying cylinder in a sleeving manner; the hot air system comprises a heat exchanger, an air heater and an exhaust fan which are sequentially connected through a hot air pipeline, and hot air generated by the hot air system penetrates through the hot air cover and then is exhausted; the steam system comprises a steam pipeline connected with the drying cylinder and a condensed steam buffer tank for storing condensed steam; the top of the condensed steam buffer tank is connected with a steam recovery pipeline, and the bottom is connected with a heat exchanger of the hot air system through a condensed water pipeline. According to the hot air balancing system, heat energy in the papermaking process can be fully utilized, energy consumption needed in the drying process is reduced, and the production cost of enterprises is greatly reduced.

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.

A rotary union for connecting a stationary body to a rotating body. The rotary union has a rotatable wear plate connectable to the rotating body and a seal ring disposed in the wear plate. A spring biased piston engages the seal ring against the wear plate with a compression spring between an end flange and the piston. The end flange and piston are at least partially disposed within a shroud, wherein the shroud has at least one aperture extending therethrough. An alignment ring is formed on the piston and is viewable through the aperture in the shroud to confirm proper distance between the end flange and the piston and proper force applied to the piston. A seal wear indicator is connected to the piston and moves between an exposed position where the seal ring is not worn and a non-exposed position where the seal ring is worn.

The present invention provides an integrated carding and drying papermaking machine capable of internal circulation, which relates to the technical field of papermaking machines. The supporting seat is a frame structure, and an electromagnetic block is fixedly connected to the top of the supporting seat. There are two electromagnetic blocks in total, which solves the problem that when drying pulp, gas is mostly extracted from the outside and heated before being blown to the pulp to dry it. However, due to the frequent extraction of air from the outside, it is difficult to effectively filter impurities in the air, and heating also causes waste of resources, which has limitations. By starting the dryer, a return pipe is used to quickly extract part of the gas blown out by the dryer and the gas remaining in the base, and the filter element arranged in the return pipe is used to filter the residual moisture in the recovered gas and then re-supply it into the interior of the dryer and blown into the interior of the base. The liquid filtered by the filter element can also be quickly discharged through the drain pipe for release.

The utility model discloses a body paper making machine which comprises a shell, two sets of pressing rollers are movably installed in the shell, two sets of electric heating rollers are arranged on the side, away from the pressing rollers, in the shell, and a water absorption cotton roll makes contact with paper. Through the design of structures such as a pressing roller, a first discharging roller, a first winding roller and a water-absorbing cotton roll, paper can be extruded through the pressing roller, so that redundant water in the paper can be pressed out, the water-absorbing cotton roll can be discharged through cooperation of the first discharging roller and the first winding roller and cooperation of the second discharging roller and the second winding roller, and in the paper conveying process, the water-absorbing cotton roll can be discharged through the cooperation of the second discharging roller and the second winding roller. The water absorption cotton roll can absorb moisture of paper, so that the water content in the paper can be reduced, when the paper passes through the electric heating plate and the electric heating roller, the paper can be dried, the drying efficiency of the paper can be improved, the drying efficiency and the drying effect of the paper can be improved, and paper production can be facilitated.

The invention discloses a manufacturing method of an environment-friendly paper product. The environment-friendly paper product is prepared from the following raw materials in parts by mass: 60-70 parts of a main fiber raw material, 25-35 parts of an auxiliary fiber raw material, 3-8 parts of an environment-friendly additive and 1-2 parts of a pretreating agent. By means of the components, by adding the auxiliary fiber raw materials, the environmental protection property is remarkably improved, waste cotton and linen and agricultural waste are converted into papermaking raw materials, consumption of primary fibers is reduced, meanwhile, waste recycling is achieved, and pollution caused by incineration and landfill is reduced. The auxiliary fibers and the main fibers have a synergistic effect and are matched with the environment-friendly auxiliaries to reinforce the quality of the paper, the cotton and linen fibers improve the flexibility, the agricultural waste fibers enhance the stiffness, lignin and short fibers are separated through low-temperature pyrolysis, impurities are prevented from affecting the performance of the paper, and solid powder rich in the lignin and the short fibers is recycled and reused.

The invention discloses an antibacterial and bacteriostatic bamboo-wood fiber-based food material packaging box and a preparation method thereof, and relates to the technical field of packaging materials. The packaging box is composed of a paper base layer and an antibacterial coating on the surface of the paper base layer. Wherein the paper base layer is made of mixed paper pulp; the antibacterial coating is obtained by coating the surface of the paper base layer with an antibacterial coating; the antibacterial coating is prepared from the following raw materials in parts by mass: 30 to 40 parts of deionized water, 2 to 2.4 parts of polyvinyl alcohol, 1.2 to 1.5 parts of glycerol, 6.7 to 7.3 parts of antibacterial particles, 0.1 to 0.4 part of rosmarinic acid and 0.5 to 0.8 part of modified silicon dioxide; the antibacterial particles are formed by mesoporous carrier materials loaded with wormwood essential oil. Due to the introduction of components such as the antibacterial particles and the modified silicon dioxide, the long-acting antibacterial, waterproof and fresh-keeping capacities of the bamboo-wood fiber-based food material packaging box are effectively improved. Therefore, the method has a wide application prospect.

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 invention relates to the technical field of paper machine control devices, in particular to a paper machine control device with a load fluctuation suppression function and a control method thereof.The paper machine control device comprises a transmission assembly, a low-pass filter and a lubricating assembly, one side of the lubricating assembly is fixedly connected with an oil conveying assembly, the front end of the lubricating assembly is fixedly connected with a filtering assembly, and the lubricating assembly comprises a base; the top end of the base is fixedly connected with a lubricating box, one side of the lubricating box is fixedly connected with an oil collecting box, an oil collecting groove is formed in the inner side of the lubricating box, the inner side of the lubricating box is fixedly connected with an oil spraying nozzle, and the inner side of the oil collecting groove is fixedly connected with a bearing body and an annular plate; according to the device, continuous lubrication of the bearing is achieved, the service life is prolonged, abrasion and vibration are reduced, equipment stability and production efficiency are improved, maintenance cost is reduced, meanwhile, a transmission system is stabilized, fluctuation influences are reduced, and paper quality and equipment operation efficiency are improved.

The invention relates to the technical field of papermaking drying auxiliary equipment, and provides a high-speed paper web stabilizer with a paper injection function, the high-speed paper web stabilizer with the paper injection function comprises a box body, an air flow passing cavity is formed in the box body, a plurality of first air inlet holes are formed in the two sides of the box body in the width direction, and an air outlet pipe is arranged on the box body; the rectifying plate is arranged on the lower portion in the box body, the upper surface of the rectifying plate faces the interior of the box body, the lower surface of the rectifying plate faces the outer side of the box body, and a plurality of second air inlet holes are formed in the rectifying plate; the negative pressure adjusting device comprises a linear telescopic driving mechanism connected to the box body and an adjusting valve plate connected to the linear telescopic driving mechanism, the adjusting valve plate is attached to the rectifying plate and is provided with an adjusting hole, and the linear telescopic driving mechanism can drive the adjusting valve plate to move so as to change the ventilation area of the second air inlet hole. According to the high-speed paper web stabilizer with the paper guiding function, the phenomenon that a paper web is folded and wrinkled under the condition of high speed can be avoided.

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.