246results about "Calenders" patented technology

The invention relates to the technical field of papermaking, and particularly provides high-strength tipping base paper for cigarettes and a preparation process of the high-strength tipping base paper. The tipping paper base paper for the cigarettes comprises a fiber raw material; functionalizing the nano cellulose; a cellulase; a dry strength agent; a wet strength agent; and a sizing agent. Nano cellulose is functionalized and a synergistic stepped enhancement mechanism is constructed, so that the synergistic breakthrough of the high-strength raw tipping paper for cigarettes in the aspects of strength, wet strength and air permeability is realized; after the functionalized nanocellulose is subjected to carboxylation treatment, the hydrogen bond and electrostatic adsorption between the functionalized nanocellulose and the fiber are enhanced, and the bonding strength in a dry state and a wet state is remarkably improved; meanwhile, the wet strength agent is added in stages, and the adsorption sequence of the dry strength agent is optimized, so that the reinforcing agent constructs a stable three-dimensional network framework in the paper sheet, and the end breaking risk under high-speed winding is effectively reduced.

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.

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 provides a preparation method of environment-friendly straw paper with hydrophobic and lip-sticking-free properties. The preparation method comprises the following steps: respectively pulping bleached softwood pulp and bleached hardwood pulp, and mixing to obtain a fiber mixture; adding a biological wax waterproof system sizing agent into the fiber mixture, or adding the biological wax waterproof system sizing agent and an antibacterial agent, and adding a wet strength agent and an alkyl ketene dimer, and carrying out net forming treatment; the preparation method comprises the following steps: carrying out squeezing dehydration and primary drying treatment on paper pulp subjected to net forming treatment, carrying out surface coating and sizing by adopting a sizing system containing a biological wax waterproof system sizing agent, carrying out secondary drying treatment, and finally sequentially carrying out calendering and coiling to obtain the environment-friendly straw paper. Experiments show that the straw paper disclosed by the invention has the advantages of excellent hydrophobicity, no lip sticking, high strength, high antibacterial property, complete degradability, no toxicity and environment friendliness.

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 invention relates to the technical field of papermaking, and particularly provides glassine paper and a preparation process thereof.The preparation process of the glassine paper comprises the steps that S100, larch pulp, eucalyptus pulp, glass fibers and polyester staple fibers are mixed, TEMPO-oxidized nanocellulose is added, pulp is prepared, after the pH is adjusted to 4.5-5.2, a composite bio-enzyme system is added for stirring treatment, and after stirring treatment is conducted, the glassine paper is obtained; adding a polycarboxylic acid cross-linking agent and a catalyst for cross-linking reaction to obtain cross-linked modified slurry; s200, carrying out wet-process papermaking molding, dehydration and drying on the cross-linked modified pulp to obtain a paper blank; s300, immersing the paper blank into a Tris buffer solution of dopamine hydrochloride, coating with a sizing agent, drying and curing, and carrying out calendering treatment to obtain a paper surface; and S400, carrying out corona treatment on the paper surface, and coating a release agent to obtain the glassine paper. The glassine paper prepared by the invention has excellent heat resistance, oil resistance, tear resistance and good release performance, and is suitable for food packaging and industrial release materials.

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

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

A press cover for a press roll or a transport belt has at least one polyurethane-containing layer. The polyurethane is obtainable by reaction of i) a polyol component, ii) an isocyanate component, and iii) a component containing at least one crosslinker. The polyol component is composed of mutually different structural units having the general formula —O—R1—X—R2—O— in which all of R1 and R2 independently of one another are identical or different and are linear or branched C1-C20 alkylene groups. Groups X are identical or different and are selected from bond, O, C(O)—O, and O—C(O)—O. At least 70 wt % of the structural units meet the following criteria: a) at least 80% of X are O—C(O)—O and the remainder are O or C(O)—O, and b) the average chain length of R1 and R2 is 8 or more carbon atoms, and c) at least 50% of R1 and R2 are independently of one another a linear or branched C8-C12 alkylene group.

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.

Disclosed are apparatuses and methods for forming films having uniform thicknesses across the entire width of the film. The films are also disclosed. The apparatus for forming the film includes a first nip roller and a second nip roller, each of the first nip roller and the second nip roller being configured to compress the powder as it passes between the first nip roller and the second nip roller and thereby form the film, whereby in the absence of a force counteracting the pressure of the passage of the powder between the first nip roller and the second nip roller the first nip roller is deflected to a greater degree than the second nip roller. Furthermore, the first nip roller and the second nip roller are each associated with one or more eccentric bearings that rotate to apply force vectors to the first nip roller and the second nip roller.

To provide a method for producing carbamate cellulose fibers capable of mass-production.SOLUTION: In producing carbamate cellulose fibers, a pulp sheet containing urea is heated by passing it between a pair of rolls at a speed of 300 to 3000 m / min, and this heating causes denaturation, and multiple sets of the pair of rolls are continuous. A preceding set or sets are a drying part, the following set or sets are a reaction part, and the temperature of the rolls belonging to the drying part is 80 to 130°C, and the temperature of the rolls belonging to the reaction part is 220°C or higher. A method for producing carbamate cellulose fibers, which is characterized in that the number of pairs of rolls is such that the passing time of the drying part is 8 seconds or more and the passing time of the reaction part is 8 seconds or more.SELECTED DRAWING: Figure 1

The invention relates to a method for adjusting a component, in particular a functional roller, for a machine for producing or processing a fibrous web, the component having at least one adjustment device for adjusting an operating state of the component, the method comprising the following steps: carrying out an image capture and / or video capture of the exterior of the component and transmitting the capture to a computing unit; determining an actual value of the operating state by means of the computing unit by image analysis of the image capture and / or video capture of the exterior of the component and / or by the acquisition of values from an embedded sensor system. On the basis of the determined actual values of the operating state: presenting metainformation regarding the adjustment of the adjustment device by overlay with the image capture and / or video capture on a display.

The invention relates to a method for operating a calender comprising at least one roller assembly (1) with at least two rollers (2), wherein a roller gap (3) is formed between each pair of rollers (2) of the roller assembly (1), and the actual thickness of a material web (4) processed by the calender is controlled and / or regulated to a target thickness. At least one of the rollers (2) is designed as a sleeve roller (5) with a roller core (6) and a sleeve (7) arranged on the roller core (6), wherein, at least after a sleeve (7) has been arranged on the roller core (6), the actual thickness of the material web (4) and / or the actual width of the roller gap (3) is measured at least once in correlation with the angular position of the sleeve roller (5) over at least one revolution of the sleeve roller (5).

The invention provides release paper, release paper backing paper and a preparation method of the release paper backing paper. The preparation method comprises the following steps: making raw paper with pulp, adding super-fine grinding fibers into the pulp, and enabling the specific surface area of the super-fine grinding fibers to be 50m < 2 > / g-100m < 2 > / g; carrying out surface sizing on the raw paper; and carrying out calendaring treatment on the glued paper. According to the preparation method of the base paper of the release paper, provided by the embodiment of the invention, the interlayer bonding strength of the paper reaches 1.5 N or above, and meanwhile, the paper also has proper surface smoothness, excellent PE bonding strength and proper moisture and whole-width uniformity; and the film spraying and silicon coating process of downstream customers can be met, and the processing efficiency is remarkably improved.

The invention discloses high-smoothness paper for daily use and a preparation method thereof. The method comprises the following steps: applying a cationic softening agent (the addition amount is 0.8%-1.2%) to paper pulp fibers, and carrying out physical swelling treatment (0.15-0.20 MPa, 20-30 minutes); then grinding under the power of 280-310 kW, and controlling the concentration to be 3.5%-4.0%; and finally, forming on a 120-140-mesh forming net under the calendering pressure of 0.25-0.30 MPa, drying at the temperature of 110-120 DEG C for 15-20 seconds, and wrinkling. An on-line detection and feedback system can be integrated, and key parameters can be dynamically adjusted. The softness of the prepared household paper is 6.0-8.0 mN, the smoothness is 45-55 s, the wrinkle depth deviation is less than or equal to 0.02 mm, and the raw materials are hardwood pulp and softwood pulp in a ratio of 8.5: 1.5. According to the scheme, unification of softness, smoothness and high strength is achieved, the problems of performance contradiction and unstable production in a traditional process are solved, and the method is suitable for continuous intelligent manufacturing of high-end household paper.

Calender for processing web material, comprising a structure for supporting two heated rollers forming an impression line, wherein each roller has surface projections (RR) and, in the operating setting of the calender, the projections of one roller are diametrically opposite to the projections of the other roller, each roller rotates around its own axis with a predetermined angular speed, the rollers are heated by heating means, and each roller is subjected to an axial elongation as a result of the heating of the heating means. The calender comprises detection means (E1, E2; IS) adapted to detect the axial elongation of each roller, and a programmable control unit (UCP) connected to the detection means and to the heating means. The control unit is programmed to determine the difference between the axial elongations of the rollers and to emit an alarm signal in the event that the absolute value of this difference is greater than a limit value.

The invention relates to a calender for producing an electrode film from a powdered electrode precursor material, comprising at least a first and a second, counter-rotating, squeeze roll, between which a roll gap is formed, wherein the calender is configured to subject the powdered electrode precursor material to shear forces as it passes through the roll gap and thereby forms an electrode film, characterized in that at least one of the first or second squeeze roll has at least a pre-tensioning device for pre-tensioning the squeeze roll against a non-axial, in particular radial and / or tangential, force vector acting on the respective squeeze roll generated in the roll gap by the compression process, by means of which the pre-tensioning direction and / or the magnitude of the pre-tensioning force can be adjusted.The invention further relates to a method for producing an electrode film having a homogeneous thickness from a powdered electrode precursor material and to a corresponding electrode film.

A bottom roller removal device for a calender includes a bottom roller support base. The upper surface of the bottom roller support base is a copper plate, which is fixedly connected to the bottom roller support base as a single unit. A bottom roller transition plate can slide along the copper plate. A nut is fixed to the bottom roller transition plate. The bottom roller support base is rotatably connected to a screw via a bearing, and the screw and nut are threadedly engaged. Compared with the prior art, the technical advantage of this invention is that the screw and nut engagement allows the nut and bottom roller transition plate to move outward during bottom roller assembly and disassembly, enabling the bottom roller transition plate to overcome obstacles from other rollers, thus facilitating crane operations.

While the calendar roller is incorporated into the calendar roller system, systems and methods for mapping and / or repairing the surface of the calendar roller are described. [Solution] A method for mapping and repairing the surface of a calender roller may include providing a calender roll system equipped with a calender roller, mapping the surface profile of the calender roller, identifying recessed areas on the surface of the calender roller based at least partially on the surface profile, and depositing material in the recessed areas. A system for mapping and repairing the surface of a calender roller is also described.

According to the technical scheme, the adjustable super calender is characterized in that the adjustable super calender comprises a supporting frame, two first bearing seats are fixedly installed on the top face of the supporting frame, and a fixed roller shaft is arranged between the two first bearing seats in a sleeved mode; during use, a first air cylinder can be started to push and pull a connecting frame to drive two second bearing seats to move synchronously, so that a pull roller shaft can be pushed to be close to or away from a fixed roller shaft, the aim of adjusting the distance is achieved, a driving motor can be started to drive a first worm to rotate, and then a first worm wheel is driven to rotate, so that the effect of rotating the fixed roller shaft is achieved; during use, when the first worm rotates, a connecting rod and a second worm are driven to rotate, a second worm gear and a movable roll shaft are driven to rotate, the effect of synchronous rotation is achieved, meanwhile, the second worm can be driven to move along with the position of the movable roll shaft to be adjusted through sleeving connection of the connecting rod and a clamping groove, and the work efficiency is improved. And the second worm can be adjusted along with the position movement of the movable roll shaft by starting the second air cylinder to push and pull the second worm, so that the convenience is increased.

The present invention relates to a support body (50) for a paper machine having an extended nip formed between the support body and a counter-pressure member, wherein the support body comprises—a base body (51) comprising an upper surface facing in the first direction, —a cover body (52) comprising a working surface (15) for forming an extended nip with a counter-pressure member, wherein the cover body (52) is mounted on the upper surface of the base body (51) such that the working surface faces in the first direction, and wherein the cover body (52) comprises a first material, said first material being a polymer. The invention also relates to a paper machine comprising a support body (50).

The invention relates to a press body for a paper machine having an extended nip formed between the press body and a counter-pressure member, in which the press body (50) is elastically deformable and comprises a working surface (15), and in which the press body comprises a first pressure chamber (51) and a second pressure chamber (52), the first pressure chamber (51) and the second pressure chamber (52) are arranged inside the pressing body (50) and separated from each other by a partition wall (55), the pressure chambers (51, 52) are configured to be pressurized such that the pressing body (50) expands in order to press the working surface (15) towards the counter pressure member, and wherein the first pressure chamber (51) has a first height (h1) and the second pressure chamber (52) has a second height (h2). The second pressure chamber (52) has a second height (h2), and wherein the first height (h1) is greater than the second height (h2). The invention also relates to a paper machine comprising such a press body.

The invention discloses a preparation method of coated gift packaging paper. The preparation method comprises the following operation steps: S1, pulping: respectively pulping bleached sulfate softwood chemical pulp, bleached sulfate broadleaf wood chemical pulp and alkaline hydrogen peroxide bleached poplar chemimechanical pulp, and mixing to form mixed pulp; s2, auxiliary material adding, wet paper sheet forming and pre-drying; s3, coating and sizing are conducted, specifically, the front face and the back face of the paper sheet are coated with a coating respectively, and the coating comprises coating-grade light calcium carbonate, coating-grade talcum powder, a dispersing agent, sodium hydroxide, modified acrylic copolymer emulsion, polyvinyl acetate latex, coating starch, sodium carboxyl cellulose, a lubricating agent and a defoaming agent; s4, carrying out post-drying and carrying out super-soft calendering treatment by adopting eight rollers and seven pressing areas; the invention also provides the coated gift packaging paper prepared by adopting the preparation method, the smoothness of the coated gift packaging paper is greater than 1200s, the roughness of the coated gift packaging paper is less than 1.2 microns, and the coated gift packaging paper completely meets the requirements of the coated gift packaging paper for absorbing and drying gravure or flexographic printing water-based ink.

A seal assembly includes a primary seal unit which seals off a first space from a second space, and a dam seal unit which delimits the second space from a discharge space so that a liquid introduced into the second space is dischargable into the discharge space. The primary seal unit includes a guide ring having a first lateral surface with a length, a rotating face which is guided on the guide ring, a retaining ring having a second lateral surface, and a secondary seal which acts between the guide ring and the retaining ring. The retaining ring is displaceable relative to the guide ring in a direction of the length of the first lateral surface. The second lateral surface of the retaining ring surrounds the first lateral surface of the guide ring at least over a part of the length of the first lateral surface.

The invention relates to a press body for a paper machine having an extended press zone formed between the press body and a counter pressure member wherein the press body is elastically deformable and comprises a working surface, and wherein the press body comprises a first pressure chamber and a second pressure chamber, the first and second pressure chambers are arranged inside the press body and separated from each other by a partition wall, said pressure chambers being configured to be pressurized such that the press body expands for pressing the working surface towards the counter pressure member, and wherein the partition wall between the first and second pressure chambers has a wall thickness of 1 mm to 20 mm. The invention also relates to a paper machine comprising at least one press body.

This utility model relates to the field of yarn tube paper production technology, and more particularly to a calendering device for yarn tube paper production. The technical solution includes a base plate, with a fixed frame fixedly connected between the top edges of the base plate and the two sides. A guide roller is rotatably connected between the inner walls of the two sides of the fixed frame near the top edge. Connecting plates are slidably fitted onto the outer surfaces of the guide rollers near both ends. This utility model uses a first rotating gear to drive a bidirectional threaded rod to rotate, causing the connecting plates to move relative to each other under the action of the bidirectional threaded rod. The connecting plates drive limiting blocks to slide on the guide rollers, thereby effectively controlling the gap between the limiting blocks, facilitating the guidance of the yarn tube paper on the guide rollers, effectively reducing uneven guidance of the yarn tube paper, making the yarn tube paper more compact during calendering, and thus improving the calendering effect of the device.

Systems (1000) and methods for mapping and / or repairing the surface of calender roller (1004) while the calender roller is still installed in the calender roll system are described. The methods for mapping and repairing a surface of a calender roller may comprise providing a calender roll system comprising a calender roller, mapping a surface profile of the calender roller, identifying a dent area on the surface of the calender roller at least partially based on the surface profile, and depositing a material at the dent area. The systems for mapping and repairing the surface of the calender roller are also described.

The utility model discloses an adjustable compression roller capable of improving the dry strength of paper. The adjustable compression roller comprises a rack and a compression roller body installed on the rack. The compression roller is characterized in that compression roller textures for promoting paper fiber combination and improving fiber compactness are arranged on the outer surface of the compression roller body; an adjusting block for fixing the compression roller body and a driving source for driving the adjusting block to slide are further mounted on the rack in a sliding manner; the rack is further provided with an electromagnet for further fixing the adjusting block. The compression roller textures are arranged on the outer surface of the compression roller body, the contact area between the compression roller body and paper is increased, paper fiber combination is promoted, moisture and air in the paper can be discharged easily, the fiber compactness is improved, and therefore the strength of the paper is improved; the adjusting blocks are further fixed through magnetism generated after the electromagnets on the rack are electrified, so that multiple fixing is conveniently conducted on the pressing roller body in the production process, and the situation that the pressing roller body deviates in the production process, and then paper production is affected is prevented.

The invention relates to the field of papermaking, and particularly provides a compound pulping method for a low-expansion-and-contraction-rate decorative paper-based material. Comprising the following steps: S100, adding a compound enzyme solution into primary pulp, and carrying out an enzymolysis reaction to obtain enzymolysis pulp; s200, performing mechanical pulping on the enzymolysis slurry to obtain slurry; s300, compounding the slurry with polyamide-epichlorohydrin resin, polyacrylamide, nano silicon dioxide, titanium dioxide and nano cellulose, and performing post-treatment to obtain a low-expansion-and-contraction-rate decorative paper base; through the synergistic effect of four enzymes, the fiber separation efficiency is improved, the fiber surface is microcosmically modified, the specific surface area is increased, more hydroxyls are exposed, and hydrogen bond bonding in the papermaking process is enhanced; the polyamide-epichlorohydrin resin and polyacrylamide are crosslinked in a fiber network, so that the dry and wet strength of the paper base is improved, and the wet size deformation is reduced; the nano silicon dioxide and the nano cellulose fill up micro gaps, optimize a pore structure and inhibit moisture absorption stress, so that low expansion and contraction rate and high stability of the decorative paper are realized.