19results about "Calenders" patented technology

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.

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.

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.

The utility model discloses a kind of soft roll calender for anti-fake paper production, calender frame, the right side upper end of calender frame is rotatably connected with hard roll, the right side lower end of calender frame is rotatably connected with soft roll, the front side middle part of calender frame is equipped with movable fixed frame, further include fixed mechanism, fixed mechanism: it includes sliding slot, fixed buckle, recess, first limit plate, protruding and adjusting assembly, sliding slot is evenly set in the inside right side of fixed frame, fixed buckle is all set in the inside right side middle part of fixed frame, the soft roll calender for anti-fake paper production, be equipped with fixed mechanism, different diameter hard pipe can be quickly fixed by different sizes of fixed buckle, fixed frame and calender frame front side can also be made into perpendicular state and parallel state by adjusting quickly, the fixed frame of perpendicular state is convenient for the maintenance of pipeline, the fixed frame of parallel state can reduce the floor area of equipment, it is convenient and fast.

Drive system (1) in a plant for the production of a paper, cardboard or fibrous web, comprising at least one electric drive (2) and one frequency converter (3), wherein the frequency converter (3) is configured to control the power and / or speed of the electric drive (2), wherein the drive (2) is operated three-phase on the frequency converter (3) at a frequency of 0 to 87 Hz, in particular at a frequency of 51 Hz to 87 Hz, wherein the frequency converter (3) has a supply voltage 1.73 times that of the rated voltage of the electric drive (2).

System for repairing or replacing an edge cover (15) of a fiber web manufacturing line, comprising a rotary mechanism (10) for moving the edge cover (15) from an operating position to a maintenance position, wherein the rotary mechanism (10) is designed as a rotary lever mechanism comprising a fastening lever (16) to which the edge cover (15) is detachably attached, a rotary arm (17) which is pivotally attached at one end to the fastening lever (16) and at the other end pivotally by a joint (13a) to a support arm (13), a rotary plate (19) with a slot (19a) to which one end of the support arm (13) is attached, a support arm (14) to which the support arm (13) is attached, and a locking arm (18) for locking the rotary lever mechanism, wherein the edge cover (15) in its operating position is arranged in, on, or near a rotating coating roller (12, 11).to limit the coating width on the coating roller (12), the system further comprising a safety fence (20), wherein in the system the maintenance position into which the edge cover (15) is moved by the rotary mechanism (10) is adjacent to the safety fence (20), wherein the safety fence (20) is arranged such that the rotating part (12, 11), the nip (N) or the gap is outside the reach of a maintenance person who repairs or maintains the edge cover (15) that has been rotated into the maintenance position by the rotary mechanism (10), wherein in the system the distance between the maintenance position of the rotary mechanism (10) and the safety fence (20) is 10 mm - 500 mm, wherein in the system the distance between the safety tooth (20) and the rotating part (12, 11) or the nip (N) or the gap is at least 600 mm, preferably 850 mm - 1500 mm,and wherein the height of the safety fence (20) is 1000 mm - 1800 mm, preferably 1200 mm - 1600 mm, measured from a surface on which a person is standing when he or she is next to the safety fence.

This invention discloses an aerosol generating article, comprising an aerosol generating matrix, a wrapping paper, and a mouthpiece. The wrapping paper surrounds at least a portion of the aerosol generating matrix. The thermal conductivity of the wrapping paper is in the range of 0.08–0.10 W / mK, 0.10–0.12 W / mK, 0.12–0.14 W / mK, 0.14–0.16 W / mK, 0.16–0.18 W / mK, or 0.18–0.2 W / mK. The thermal conductivity of the aerosol generating matrix is ​​in the range of 0.08–0.10 W / mK, 0.10–0.12 W / mK, 0.12–0.14 W / mK, 0.14–0.16 W / mK, 0.16–0.18 W / mK, or 0.18–0.2 W / mK. This significantly increases smoke production, reduces production costs, simplifies the manufacturing process, and improves production efficiency. The present invention also provides a method for preparing wrapping paper.

The application discloses a kind of insulation paper for formation cabinet and preparation method thereof, insulation paper for formation cabinet includes the following components according to mass percentage: 22~30% meta-aramid short fiber, 20~34% PEN short fiber, 32~41% Co-PET / PET sheath-core type bicomponent short fiber, 5~12% aqueous phosphate modified epoxy resin emulsion, 0.7~1.5% wet strength agent, 0.5~1% dispersant.The insulation paper prepared by the preparation method of the application has good high-temperature resistance, insulation, flame retardance, chemical stability and thickness uniformity, and has certain tensile strength and wear resistance, low impurity content, and is not easy to produce dust.

This invention relates to the field of intelligent manufacturing technology in logistics, and more particularly to an intelligent management system for raw paper based on multimodal data. The invention includes a feature acquisition module, a feature pre-analysis module, a feature recognition module, a region joint analysis module, and a raw paper storage optimization module. The feature pre-analysis module determines humidity trend parameters to assess the presence of abnormal risks in the raw paper. The feature recognition module performs optical response analysis on each monitored sub-region to mark the feature monitoring sub-regions. The region joint analysis module performs joint response analysis on each feature monitoring sub-region to determine the optimal adjustment method for the hot-pressing roller. The raw paper storage optimization module determines whether the storage of the raw paper needs optimization. This invention enables rapid identification of abnormal risks in raw paper and adaptive adjustment of storage parameters based on the characteristics of the raw paper, improving the effectiveness and reliability of intelligent raw paper management.

According to an example aspect of the present invention, there is provided a collar (100) for compressing a sleeve on a drum (200), the collar (100) comprising: an inner part (110) configured to be attached to an end of the drum (200), an outer part (130), and a slip part (120) between the inner part (110) and the outer part (130), which slip part (120) is configured to be engaged with the sleeve, wherein the inner part (110), the slip part (120) and the outer part (130) are assembled together in succession along an assembly axis, and the slip part (120) is configured to translate between the inner part (110) and the outer part (130) along the assembly axis.

The application provides a calendering method of aramid insulation paper, and relates to the field of high polymer chemistry and polymer processing, and comprises the following steps: step one, preheating aramid insulation paper; step two, feeding the substrate into a calendering machine, and performing calendering treatment at a set temperature, pressure and linear speed by using a multi-stage pressure control system; and step three, monitoring the thickness uniformity and surface quality of the aramid insulation paper in real time through an online detection system. The application has the following advantages: through the synergistic effect of multi-stage progressive pressure control, high-precision temperature regulation (±2 ℃) and optimized linear speed, and in combination with machine vision online detection and real-time feedback, the shortcomings of traditional calendering processes are effectively overcome, the surface smoothness, thickness uniformity and mechanical properties of the aramid insulation paper are significantly improved, the precision, efficiency and quality consistency of the production process are greatly improved, and the generation of surface defects such as stripes and corrugations is avoided.

The invention relates to a system (100) for switching a calendering device (200) from a hard-nip calendering mode with at least one heating roll (20) and at least one hard deflection compensation roll (30) to a soft-nip calendering mode with at least one heating roll (20) and at least one soft deflection compensation roll (40) and vice versa, comprising at least one sensor (300), a control unit (50) and a database (550) having data regarding values or characteristic maps of the operating parameters in the hard-nip calendering mode and in the soft-nip calendering mode; wherein: the hard deflection compensation roll (30) comprises at least one first identification element (37); the soft deflection compensation roll (40) comprises at least one second identification element (47); the sensor (300) is designed to capture the first or second identification element (37, 47) and to identify the type of the particular deflection compensation roll (30, 40); and the control unit (500) is designed to retrieve from the database (550) the data comprising the operating parameters for the hard-nip calendering mode or the soft-nip calendering mode and to operate the calendering device (200) with the retrieved operating parameters.

The present application relates to the technical field of electrolytic capacitor separator paper, and particularly relates to a flexible supercapacitor separator paper, a preparation method and application. The separator paper adopts synergistically constructed ternary fiber system of sisal fiber, Tencel fiber and polyester staple fiber, is formed through a wet papermaking process, and is subjected to alternating hot pressing and cold pressing treatment, so that the paper has low density, high strength, low internal resistance, small pore size and excellent bending breakdown resistance. The separator paper is suitable for the winding or laminated structure of supercapacitors, and effectively improves the power density, cycle life and structural reliability of the supercapacitors.

The present invention relates to a press body for a paper machine having an extended nip 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 that are arranged inside the press body and separated from each other by a partition wall, which pressure chambers are 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 – 20 mm. The invention also relates to a paper machine comprising at least one press body.

A roller for a material web processing machine, wherein the roller includes a roller cylinder having a cylindrical roller core, a roller sleeve surrounding the roller core, and an outer cover, wherein the roller sleeve is composed of one or more roller sleeve layers in a radial direction, and the roller sleeve includes a plurality of sensors, characterized in that a conductive shield is arranged radially between these sensors and the outer cover; a material web processing machine including a sensor roller and a corresponding roller arranged parallel to the sensor roller, with a processing gap between the sensor roller and the corresponding roller, wherein each of the plurality of sensors of the sensor roller is capable of detecting pressure applied to the sensor roller when passing through the processing gap.

The invention pertains to a method for producing multiply paperboard on a paper machine. The process involves forming a paperboard web with a top ply, back ply, and at least one middle ply, where the middle ply consists of at least 40 wt% Chemi-Thermo Mechanical Pulp (CTMP). The back ply is made of at least 80 wt% unbleached kraft pulp with a kappa number of at least 40. The paperboard web undergoes dewatering, pressing, drying, and cooling. It is then calendered in a hard nip with a load ranging from 10-50 kN / m to achieve high smoothness while maintaining the bulk of the paperboard. This method, which incorporates CTMP in the middle ply and high kappa number unbleached kraft pulp in the back ply, benefits from reduced calendering pressures due to pre-cooling, optimizing the paperboard's properties.

This invention discloses a production process and product for washable and environmentally friendly kitchen paper. The process includes pulp preparation, wet strength agent addition, papermaking, TAD drying, and post-treatment steps. The pulp is a mixture of 45% softwood pulp fiber and hardwood pulp fiber, which undergoes differentiated beating treatment. The wet strength agent is a compound of polyamide epichlorohydrin resin and cationic starch, added in a specific order and proportion. After dewatering and forming on the wire section of a TAD paper machine, it undergoes hot air penetration drying through the pre-drying cylinder and the main drying cylinder, with the hot air velocity in the main drying cylinder hood being 18-20 m / s. Post-treatment employs a composite process combining point bonding and line bonding. This process, through the synergy of fiber ratio, wet strength agent compounding, and TAD drying technology, ensures that the resulting kitchen paper has a longitudinal wet tensile strength of not less than 300 mN, can withstand at least 4 standard washes, and combines environmental friendliness and durability, meeting the washable and reusable needs of kitchen cleaning scenarios.

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

A method for preparing carbamated cellulose fibers applicable to mass production is provided. The method includes heating a pulp sheet containing urea between a pair of rolls while passing therebetween at 300 to 3000 m / min, to cause modification, wherein a plurality of pairs of the rolls are arranged consecutively, wherein one or a plurality of preceding and following pairs of the rolls constitute drying and reacting sections, respectively, wherein temperatures of the rolls belonging to the drying and reacting sections are 80 to 130 °C and 220 °C or higher, respectively, wherein a number of the pairs of the rolls are such that time required for the pulp sheet to pass through each of the drying section and the reacting section is 8 seconds or longer.