306results 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.

A roller for a web processing machine, wherein the roller comprises a roller cylinder having a cylindrical roller core, a roller covering surrounding the roller core, and a lateral surface, wherein the roller covering consists of one or more roller covering layers in the radial direction and contains sensors, characterized in that an electrically conductive shield is arranged in the radial direction between the sensors and the lateral surface; a web processing machine comprising the sensor roller and a counter roller arranged parallel to the sensor roller with an intermediate treatment gap, wherein each of the sensors of the sensor roller can detect the pressure exerted on the sensor roller when passing through the treatment gap.

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.

To prevent risk of deforming a sheet that is molded by pressurizing and heating a web.SOLUTION: A sheet manufacturing device 1 has an accumulation part 50 to form a web W, a molding part 70 to mold the web W into a sheet P1, and a control part 5. The molding part 70 comprises: a first roller 72 to heat the web W and the sheet P1; a second roller 73 to nip the web W between itself and the first roller 72; a winding roller 74 that is disposed on the downstream side of the first roller 72 and winds the sheet P1 around the first roller 72; press rollers 761, 762, 763 that press the sheet P1 wound around the first roller 72 against the first roller 72; and a press roller moving part 77 to change positions of the press rollers 761, 762, 763. The control part 5 controls the press roller moving part 77 based on a position of a tip of the sheet P1.SELECTED DRAWING: Figure 11

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 utility model belongs to the technical field of papermaking, and particularly relates to a calendaring device for producing inkjet heat transfer printing body paper, which comprises a rack, and an upper calendaring roller and a heating roller are arranged on the rack. The upper calendering roller is rotationally arranged on the rack; the heating roller is arranged below the upper calendering roller, the two ends of the heating roller are communicated with a liquid inlet pipe and a liquid outlet pipe, and an adjusting assembly is arranged in the heating roller and used for adjusting the distribution area of hot liquid in the heating roller. According to the utility model, the area range of the hot liquid entering the heating roller from the liquid inlet pipe can be adjusted through the adjusting assembly according to the width of a paper web to be calendered, so that the hot liquid can be heated in a targeted manner, and the waste of heat is reduced.

The invention relates to a calender (100) for calendering sheet materials (10), preferably in order to produce electrodes, having a first roller (1) and a second roller (2). The rollers (1, 2) can be moved relative to each other in an axial direction (A), and the calender (100) has first actuation means (7) for bending the first roller (1) by the introduction of torque in a radial direction (R). The invention additionally relates to a method for operating a calender (100).

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 relates to a calender (100) for calendering flat structures (10), preferably in order to produce electrodes, having a first roller (1) and a second roller (2). The rollers (1, 2) can be moved relative to each other along a first axial direction (A1) of the first roller (1) and / or a second axial direction (A2) of the second roller (2). The first roller (1) has a first profile (P1), and the second roller (2) has a second profile (P2). The calender (100) has a tilting means (7) for tilting the first roller (1) and the second roller (2) about a tilt axis (V), said tilt axis (V) being perpendicular to the first axial direction (A1) and the second axial direction (A2). The invention additionally relates to a method for operating a calender (100).

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.

The invention belongs to the technical field of tea filter paper manufacturing, and particularly relates to a green environment-friendly antibacterial tea filter paper manufacturing process which comprises the following steps: S4, calendaring and processing: calendaring wet paper through a calendaring machine to enable the surface to be smoother, processing according to needs, cutting into filter paper sheets with specific sizes, and cutting the filter paper sheets into filter paper sheets with specific sizes; and S4, the calender comprises a supporting beam used for supporting, a control cabinet is fixedly installed on the upper surface of the supporting beam, a calendering mechanism is arranged on the upper surface of the supporting beam, a shearing mechanism is arranged above the calendering mechanism, and a sorting mechanism is arranged below the calendering mechanism. According to the manufacturing process of the green and environment-friendly antibacterial tea filter paper, a speed reducing motor drives a linkage oblique bevel gear at the lower end to rotate, and then relative rotation of an inner sleeve and an outer sleeve is achieved under two driving oblique bevel gears and a linkage oblique bevel gear at the upper end, so that relative rotation of a connected shearing plate can be achieved, and the filter paper can be clamped and sheared off.

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 present invention relates to a neck bush (100) as part of an oil film bearing in a roll stand, which is used to accommodate the conical roll neck of the roll of the roll stand, in particular the backup roll. The oil film bearing with the neck bush is used to support the roll in the roll stand. In order to form a sufficiently large lubricant film gap in the area between the inside of the neck bush (100) and the outside of the roll neck when passing through the angular area with the highest pressure load during the rolling operation, and at the same time to prevent the axial forces acting on the fixing ring (230) that holds the neck bush (100) axially on the roll neck from becoming too large, the present invention contemplates designing the neck bush according to the following formula: 0.35<3.6 / a(DB)+kD<0.5, where D is the outside diameter of the neck bush, a is the drawn cone length of the longitudinal part of the cone, k is the slip coefficient and B is the cone major diameter.

There is provided a method for producing a high-density paper comprising the steps of: a) providing or producing a paper substrate; b) coating the paper substrate with an aqueous coating composition using a blade coater to obtain a coated paper; c) drying the coated paper to obtain a dried coated paper; and d) supercalendering the dried coated paper at a moisture content of 4-9 %, such as 4-8%.

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).

Composite material comprising a matrix material (5) and a reinforcing structure (6) which is embedded in the matrix material (5), characterized in that the reinforcing structure (6) comprises or consists of a mixed textile (1), wherein the mixed textile (1) comprises both sustainable fibers (2) and reinforcing fibers (3).

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.