459results about "Dryer section" patented technology

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.

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 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 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 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 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 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.

To provide a pollution prevention agent composition sufficiently excellent in pollution prevention effect and its long-lasting property.SOLUTION: The invention relates to a pollution prevention agent composition used in applying to a dry part D of a papermaking process and comprises an emulsion composed of a silicone-based oil which is liquid at an ordinary temperature, an aqueous medium which is liquid at an ordinary temperature, and a dispersant for dispersing the silicone-based oil in the aqueous medium, wherein the aqueous medium is composed of water and a polyhydric alcohol dissolved in water, a boiling point of the polyhydric alcohol is higher than 100°C, a blending ratio of the silicone-based oil to 1 pt.mass of the polyhydric alcohol is 0.5-50 pts.mass, a blending ratio of water to 1 pt.mass of the polyhydric alcohol is 25-300 pts.mass, and a blending ratio of the dispersant to 1 pt.mass of the polyhydric alcohol is 0.1-50 pts.mass.SELECTED DRAWING: Figure 1

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 invention provides a dehumidifying and drying steam unit which is used for dehumidifying and drying gas required by external energy consumption equipment and comprises a first-stage energy conversion assembly, a waste heat condenser and a second-stage energy conversion assembly, and the waste heat condenser is provided with a first-stage refrigerant inlet, a first-stage refrigerant outlet, a second-stage refrigerant inlet and a second-stage refrigerant outlet; the first-stage energy conversion assembly comprises a first-stage compressor used for enabling a refrigerant to reach preset temperature and pressure, the first-stage compressor is provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant outlet of the first-stage compressor is connected with a first-stage refrigerant inlet of the waste heat condenser through a pipeline; gas needing to be dried sequentially passes through the first internal pipeline and the second internal pipeline, and the first internal pipeline and the second internal pipeline are communicated end to end in the gas flowing direction; the fin condenser is located in the second internal pipeline and provided with a refrigerant inlet and a refrigerant outlet, and the refrigerant inlet of the fin condenser is communicated with the first-stage refrigerant outlet of the waste heat condenser through a pipeline; a fin evaporator; and a first-stage gas-liquid separator.

The utility model discloses drying equipment for toilet paper production, and belongs to the field of toilet paper production. The drying equipment for toilet paper production comprises a shell, an air heater is hung at the rear end of the outer wall of the shell, an anti-scraping roller is arranged at the upper end of the interior of the shell, and a heating piece is obliquely arranged at the lower end of the anti-scraping roller. The drying device for the toilet paper production solves the problems that wet toilet paper in an existing drying device for the toilet paper production is large in weight, weak in tensile strength and prone to breakage in the conveying process. The toilet paper with a certain temperature is extruded by the extrusion roller, redundant liquid is discharged, then the toilet paper makes contact with high-temperature dry gas discharged by the first conveying pipe and makes contact with heating of the second heating block, and in the whole drying process, rotation of the extrusion roller can provide assistance for conveying of the toilet paper; and the toilet paper always falls down and passes through the interior of the shell by virtue of self weight.

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 utility model discloses a rotary hot cylinder heat preservation device which comprises an installation machine body, multiple sets of rotary hot cylinder bodies are installed on the surface of the installation machine body, and the surfaces of the multiple sets of rotary hot cylinder bodies abut against raw material paperboards. The end cover heat preservation cover and the second heat preservation reflecting plate are both made of metal, so that the end cover heat preservation cover and the second heat preservation reflecting plate have high infrared reflectivity, heat radiation of the rotary heat cylinder body is reflected back to the interior of the end cover heat preservation cover and the second heat preservation reflecting plate, dissipation can be avoided, and the first heat preservation cotton and the second heat preservation cotton are made of heat insulation materials and have low heat conduction coefficient. The end cover heat preservation cover can prevent heat loss, and the suede heat preservation adhesive tape can prevent steam emitted by the lower layer rotary hot cylinder main body during ironing of the raw material paperboard from being condensed on water drops formed at a lower temperature to accumulate and drop on the lower layer raw material paperboard. Accessories in the rotary hot cylinder main body can be conveniently checked and maintained.

A control method for a sheet manufacturing apparatus includes a stop signal input step of inputting, to the sheet manufacturing apparatus manufacturing a sheet, a stop signal stopping manufacturing of the sheet and a drying step of drying a predetermined area of the sheet manufacturing apparatus by controlling a blower of the sheet manufacturing apparatus after the stop signal input step.

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).