29results about "Pulp beating/refining methods" patented technology

Textile fibers of different lengths are fractionated in a liquid medium at a predetermined consistency into at least two fractions on the grounds of the fiber length, the two fractions being a first accept and a second accept. The second accept, which has longer fibers than the first accept, is led to a refining step in the liquid medium, and the refined fibers are fractionated in the liquid medium into at least two fractions on the grounds of the fiber length.

There is provided a bleached high temperature chemithermomechanical pulp and a method for producing said HT-CTMP comprising the steps: a) providing wood chips comprising softwood, hardwood or mixtures thereof; b) impregnating the wood chips with an impregnation liquid comprising NaOH and / or Na2SO3 to obtain impregnated chips; c) transferring the impregnated chips to a heating zone without compressing the impregnated chips; d) heating the impregnated chips in the heating zone with steam having a temperature of above 140 °C, such as at least 150 °C, such as at least 160 °C, to obtain pre-treated chips; e) defibrating the pre-treated chips to obtain a pulp; f) bleaching the pulp to obtain a bleached pulp; and g) refining the bleached pulp at a consistency of 3-8 wt. % to obtain bleached HT-CTMP.

A refiner disc of a refiner (100) for refining of lignocellulosic material, said refiner disc (30) having an active surface (1; 1') comprising a pattern of bars (10) and grooves (20) disposed in a number of pattern areas (41; 41'), wherein said pattern areas (41; 41') are positioned side by side with each other to cover at least a part of the active surface (1; 1'). Each of said pattern areas (41; 41') has a length, l, extending between a first end (43a) and a second end (43b) of the pattern area (41; 41') and a width, w, extending between two side edges (45a, 45b) of the pattern area, wherein a distance between the two side edges (45a, 45b) is smallest in the first end (43a) of the pattern area (41; 41') and is increasing towards the second end (43b) of the pattern area. Each of said pattern areas (41; 41') is positioned on the active surface (1; 1') such that a centre line, c, of the pattern area (41; 41') is provided at an angle, p, to a radius, R, of the refiner disc (30), said angle, p, being between 10-60°.

The invention relates to a sensor device (1) comprising a transducer (3) adapted to generate a magnetic field (MF), the sensor device (1) being configured to measure a beating gap (G) between a first refining disc (5) and a second refining disc (7) of a refiner arrangement (9) and to be mounted in the first refining disc (5), the sensor device (1) comprising a magnetic pole (13), a coil assembly (15) and a measuring head (11') configured to be set in a calibration position relative to the second refining disc (7) for calibration of the sensor device (1). The measuring head (11') comprises an outer end (10') made of a non-magnetic material configured to be positioned in abutment with the second refining disc (7) in a calibration sequence. The invention also relates to a method of calibrating said sensor device (1).

The application discloses a kind of high thickness of high bulk pulp and its preparation process, belong to papermaking technical field.The technical scheme is as follows: including the following steps, raw material preparation and pre-soaking treatment, reaction bin reaction, high consistency refining treatment, bleaching, latent elimination, low consistency refining, screening and washing, 1) raw material preparation and pre-soaking treatment: the raw material wood chip is broken, then pre-soaking is carried out, control pre-soaking temperature 80~90 ℃, pH value 9.8~10.2, liquid level ≥50%, ADI back pressure ≥4bar, NaOH dosage is 1.5%~2.0% of dry wood chip weight;2) high consistency refining treatment: the wood chip after pre-soaking is sent into high consistency refiner for refining, refining consistency 35~45%;3) bleaching: pulp after refining is sequentially subjected to one-stage bleaching and two-stage bleaching.The application process has high stability, and can realize the synchronous and stable improvement of bulk and freeness.

The application discloses a food-grade high-strength and high-toughness paper pulp, paper products and a preparation method thereof, and belongs to the technical field of papermaking. The food-grade high-strength and high-toughness paper pulp comprises 100 parts of virgin wood pulp, 1-3 parts of alginic fiber, and 0.3-1.5 parts of a wet strength agent, and the wet strength agent is a random copolymer of methyl acrylate, glycidyl ether-based polyethylene glycol monoallyl ether, dihydro-jasmine acid methyl acryloyl oxy hydroxypropyl ester and acrylamide propyl trimethyl ammonium chloride. The alginic fiber and the wet strength agent are added into the virgin wood pulp, so that the strength and toughness of the paper products are improved.

The present invention relates to a method for manufacturing a cellulose pulp composition for a moldable cellulose fiber-based web, said method comprising: a) providing a cellulose pulp composition comprising at least 50 wt% chemical or semi-chemical wood pulp based on dry weight, b) subjecting the cellulose pulp composition provided in step a) to low consistency (LC) refining at a consistency in the range of 1-7 wt% to an SR value in the range of 18-50 as determined by standard ISO 5267-1, c) subjecting the LC-refined cellulose pulp composition obtained in step b) to high consistency (HC) refining at a consistency in the range of 12-40 wt% with a refining energy of at least 150 kWh / t, and d) diluting the HC-refined cellulose pulp composition obtained in step c) to a consistency in the range of 0.1-10 wt%. The invention further relates to a method for manufacturing a moldable cellulose fiber-based web and a method for manufacturing a molded cellulose fiber-based product.

The invention relates to a novel method for producing classifier wheels, stators or rotors for comminution devices, in particular classifier or impact mills, for grinding and homogenizing different, even clumpable and sticky products, wherein once the properties of the pulverulent, granular or fibrous products or product mixtures to be comminuted or separated are determined, a production data set for the constructive design of the stator, classifier wheel or rotor is determined on the basis of the anticipated abrasion or material properties of the products or product mixtures. The material or a material mixture is then defined and a material data set processed. On the basis of the respective production and material data sets, an additive manufacturing device, in particular a 3D printer, is commissioned, and the particular classifier wheel, stator or rotor with its predetermined use-typical properties is additively manufactured, with longer lifetimes and uniform wear in the monolithic construction with different, additively combined materials being achieved.

This disclosure provides a grinding disc (1) for fine grinding of lignocellulosic materials. The grinding disc (1) has a surface comprising a plurality of cutting teeth (10) extending in a direction between the inner periphery (17b) and the outer periphery (17a) of the grinding disc (1). j ), and multiple paddle stops (11 i Each baffle is located in the corresponding pair of adjacent cutter teeth (10). k 10 K+1 The grinding disc (10) extends between the two sides. The grinding disc (11) of the fine grinding mill includes at least one slurry baffle (11). p ), the slurry baffle (11) p The grinding disc (1) includes a curved side (11c) facing the inner periphery (17b) of the grinding disc (1). The curved side (11c) has a concave curvature relative to the inner periphery (17b), thereby allowing the grinding disc (11) to be positioned within the grinding disc. p ) and corresponding pairs of adjacent cutting teeth (10 k 10 k+1 A circular portion is formed within the area (20) defined by the slurry. Additionally, at least one slurry baffle (11) p The grinding disc is a three-dimensional extended body. The circular portion generated by the concave curvature gives the grinding disc of the fine grinding mill more robustness. This disclosure also provides a fine grinding mill disc including such a fine grinding mill disc. This disclosure further provides a fine grinding mill having at least one such fine grinding mill disc.

Disclosed is mechanical and decolorization pretreatment of cotton-containing textiles, such as "trash" feedstock in terms of end-of-life-cotton textiles, that may be used to produce sugar without the use of harsh pretreatments conditions.

The invention relates to a grinding tool for producing a fibre material from plants with a high proportion of silicate for the production of paper and card, said grinding tool having at least one stator disc (10) with elevations (12) and notches provided therein in the form of first and second slits (14, 16), which together form cutting edges for comminuting the plants, wherein the upper side of the elevations (12) has a hard material layer (20). The invention also relates to a method for producing a fibre material from plants with a high proportion of silicate for the production of paper and card by means of such a grinding tool.

In a first aspect, the invention is directed to a process for preparing nanocellulose from a polymeric material comprising cellulose fibers, the process comprising: (i) Providing pieces p1 of the polymeric material comprising cellulose fibers; (ii) Shredding the pieces p1 provided according to (i) in n shredding devices SD(i) wherein n is an integer with n≥1 and i=1...n, thereby obtaining pieces p2, which comprise cellulose fibers; (iii) Preparing an aqueous mixture comprising the pieces p2 at a temperature T1 and adjusting the temperature of the aqueous mixture comprising the pieces p2 to a temperature T2 with T2 > T1, thereby obtaining an aqueous mixture comprising the pieces p2 and having temperature T2; (iv) Introducing at least one enzyme capable of degrading cellulose (cellulase) into the aqueous mixture obtained according to (iii), thereby obtaining an aqueous mixture comprising the pieces p2 and at least one enzyme, wherein the aqueous mixture has temperature T2; (v) optionally milling the aqueous mixture obtained according to (iv) in a milling device MD(1), thereby obtaining an aqueous mixture comprising the at least one enzyme and milled pieces p3, which comprise at least partially degraded cellulose fibers; and (vi) Milling the aqueous mixture obtained according to (iv) or (v) in a stirred media mill SMM, thereby obtaining an aqueous mixture comprising the at least one enzyme and nanocellulose (at least partially degraded and / or at least partially defibrillated cellulose).

This application relates to a method for processing textile fibers of different lengths, comprising grading the fibers into at least two fractions according to fiber length in a liquid medium at a predetermined concentration, the two fractions being a first sizing and a second sizing; guiding the second sizing (whose fibers are longer than those of the first sizing) to a refining step in the liquid medium; and grading the refined fibers into at least two fractions according to fiber length in the liquid medium.

The application discloses a refining plate and a method for pulping wood processing by-products. The refining plate comprises a plate base, a defibration zone and a beating zone arranged on the plate base. The beating zone comprises a plurality of wedge-shaped teeth arranged at intervals, and a groove is formed between two adjacent teeth. The bottom surface of the groove is a first flow guide slope surface gradually rising from front to back. The rear end of the first flow guide slope surface forms a first limiting step with the surface of the plate base. The method for pulping wood processing by-products comprises collecting, slicing, screening and cleaning, pre-cooking and refining. The refining is performed by the above-mentioned refining plate. The pulp is rubbed between the interlaced teeth. Compared with the secondary wood pulp obtained by the traditional refining plate, the beating degree of the secondary wood pulp is increased by 2-3°SR, the wet weight is increased by 2-3g, and the beating degree can reach 14-16°SR.

A process for preparing paper pulp, comprising the following steps: - mixing (E10) a mass percentage of a fibrous by-product (10) with a complementary mass percentage of cellulosic pulp (20), wherein the fibrous by-product (10) comprises at least one of the following: coffee husk obtained from roasting coffee beans, the coffee husk comprising a mass percentage of water-soluble compounds greater than 15% and a mass content of water less than 20%, and textile dust having a length of less than 5 mm; and - refining (E20) the mixture to obtain paper pulp.

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 embodiment of the application discloses a preparation method of green low-consumption natural-color bamboo mechanical pulp, which comprises the following steps: impregnating and treating bamboo chips with a sodium hydroxide solution at 50-80 DEG C, adjusting pH to 8-9 to obtain softened bamboo chips; adding hydrogen peroxide, performing first high-concentration grinding at a grinding concentration of 20-30% and a temperature of 80-90 DEG C to obtain first pulp; performing hot softening treatment on the first pulp at 90-95 DEG C; performing second high-concentration grinding; and finally performing washing and concentration to obtain the natural-color bamboo mechanical pulp; the method is a synergistic process of low-alkali impregnation, hydrogen peroxide assisted grinding, mild hot softening and two-stage fine grinding, and bamboo by-products are efficiently converted into the natural-color bamboo pulp with high yield, moderate whiteness and fully separated fibers by using extremely low chemical consumption and energy consumption, and the problem of high pollution and high energy consumption in traditional chemical pulping is avoided; and the application also provides the natural-color bamboo mechanical pulp prepared by using the method.

Sustainable paper-based packaging materials, e.g., paper-based food packaging materials, are described. The packaging materials are based on paper formed from fiber derived from waste biomass, such as hemp hurds, mixes containing hemp hurds and hemp bast fibers, bagasse, and cocoa pod husks. Also described are methods of making the packaging materials. The methods can include environmentally friendly pulping and / or bleaching processes.

The present application relates to papermaking equipment technical field, specifically to a kind of boxboard production's pulp grinding device, comprising: tank;Inlet and outlet pipe group, the inlet and outlet pipe group is located in the side of tank and can be supplied with pulp discharge;Pulp grinding mechanism, the pulp grinding mechanism is located in tank and can be stirred and pulp grinding treatment to pulp;The pulp grinding mechanism includes: pulp grinding assembly, stirring assembly and power device, the power device is located in the lower end of tank, the pulp grinding assembly and stirring assembly are located in tank from top to bottom and are interconnected, the stirring assembly is connected with power device, by the cooperation of pulp grinding assembly and stirring assembly, can be fully pulp grinding treatment to pulp raw material in boxboard production process, especially the dispersion stirring treatment before pulp grinding, can minimize the fiber of flocculation or agglomeration, improve the efficiency and effect of pulp grinding.

The present application relates to a kind of production method of fine paper kraft, including ready slurry, slurry, papermaking step.Different from prior art, the above technical solution uses regenerated pulp board and bamboo pulp board as raw material, and the regenerated pulp board is processed from waste paper, which realizes the recycling of fiber resources, greatly reduces the cost of raw materials and environmental load;The bamboo pulp board is taken from fast-growing bamboo, and the bamboo has short growth cycle and excellent fiber performance, which is an ideal green raw material to replace virgin wood pulp.The combination of regenerated pulp board and bamboo pulp board for fine paper kraft production can not only play the environmental protection and cost advantage of regenerated pulp, but also make up for the short board of insufficient strength of regenerated pulp by the fiber characteristics of bamboo pulp, to create a new type of fine paper kraft with performance up to standard and green environmental protection, which is of great significance to promote the transformation and upgrading of packaging paper industry.

The utility model relates to the technical field of pulp mill, concretely is double disc pulp mill. Including material cylinder, crushing mechanism and the blanking tube, the bottom of material cylinder is provided with support, the crushing mechanism includes the bottom disc that rotates the installation in the inside of material cylinder, is located the polishing disc above bottom disc and is installed in material cylinder for driving polishing disc and bottom disc first power component that each other reverse rotation, polishing disc is double cone structure, and the upper end of bottom disc is in accord with the bottom of polishing disc, the circumferential side of bottom disc is installed with sealing ring, the outer surface of polishing disc, the inner surface of bottom disc and the inside wall upper portion of material cylinder all are installed with a plurality of grinding teeth, and the blanking tube communicates with the inside recessed chamber of bottom disc. The utility model discloses through increasing polishing area and improving the relative speed of polishing disc and bottom disc to improve the pulping efficiency of equipment.

The utility model discloses a papermaking grinding machine dynamic disc positioning pin structure improved device relates to grinding machine technical field, including base, the top fixedly connected with papermaking grinding machine main body of base, and one end of papermaking grinding machine main body is provided with the grinding cylinder, and the inside rotatory mounting of grinding cylinder has the pivot, and the outer surface of pivot is provided with the grinding dynamic disc, and the one end of pivot is provided with the thread groove in the center, and the outer surface of pivot is provided with the vertical groove, and the vertical groove is located the top of thread groove, and the inside of vertical groove is communicated with the inside of thread groove, and the inside of thread groove and vertical groove is provided with the anti -loose bolt subassembly, and through the inside of limiting through -slot of positioning pin board will enter, thereby will fix the grinding dynamic disc and resist, and through the effect of positioning pin board simultaneously, can make the grinding dynamic disc on the pivot and limit, thereby makes the grinding dynamic disc and the pivot between not easy loosening, thereby can guarantee the evenness of grinding gap, thereby can make the grinding dynamic disc stable work.

This utility model belongs to the technical field of pulping equipment, and particularly relates to a paper raw material pulping machine, including: a pulping tank, a fixed cover, a pulping disc, a power source, and a locking component; a pulping trough is provided on the top of the pulping tank, and a discharge pipe is provided at the bottom of the pulping trough, with a control valve on the discharge pipe; the fixed cover is detachably installed on the top of the pulping tank, forming a pulping chamber with the pulping trough, and a feeding port is provided on the fixed cover; the pulping disc is rotatably installed at the bottom of the fixed cover, and the bottom surface of the pulping disc cooperates with the bottom surface of the pulping trough to pulp the raw material, and a feeding hole is provided on the pulping disc, which connects with the feeding port when the pulping disc rotates to the feeding position; the power source can drive the pulping disc to rotate; the locking component can lock the pulping disc when it rotates to the feeding position; compared with the prior art, the pulping machine of this utility model has a simple structure, high feeding efficiency, and low manufacturing cost.

The present application relates to the technical field of a pulp mill, in particular to a pulp mill for paper pulp manufacturing, which comprises a machine base, a shaft power assembly and an outer shell, the outer shell can be split, the outer shell and the shaft power assembly are installed on the upper side of the machine base, one end of the shaft power assembly is installed in the inner side of the outer shell, the shaft power assembly can be power rotated relative to the outer shell and the machine base, two stator disc assemblies are installed in the inner side of the outer shell, the stator disc assemblies are coaxially arranged with the shaft power assembly, and a rotating disc assembly is arranged between the two stator disc assemblies. The pulp after being ground can pass through a second mixing treatment mechanism, the second mixing treatment mechanism can again mix and treat the material entering the stator disc assembly and the rotating disc assembly for grinding, so that the paper pulp is prevented from being separated again due to the grinding resistance, the paper pulp after secondary mixing is again subjected to grinding treatment, the mixing degree of the pulp is ensured, and the subsequent pulp is stably flowed between the stator disc assembly and the rotating disc assembly after being pumped.

The defibringing and deflaked pulper has a defibringing rotor-stator pair and a deflaked rotor-stator pair to process fibrous materials into smaller fragments. The defibringing and deflaked pulper generates a vortex circulation formed by the impeller, which draws the material through the defibringing rotor-stator interface, where it is broken down into smaller fragments, and then draws the material through the deflaked rotor-stator interface, where it is broken down into even smaller fragments. The defibringing and deflaked pulper accumulates the defibringed and further deflaked material that has passed through the defibringing rotor-stator interface and the deflaked rotor-stator interface for further processing. This combination of defibringing and deflaked in the defibringing and deflaked pulper reduces clogging by large material fragments and reduces downstream material processing, thereby improving productivity and lowering costs.

The application relates to the technical field of cotton pulp production, and discloses a production process of cotton pulp for lyocell fibers, the cotton pulp for lyocell fibers has the following indexes: a polymerization degree of 500-800; a whiteness of greater than or equal to 89%; a methyl cellulose content of greater than or equal to 95%; an ash content of less than or equal to 0.05%; a fiberization rate of greater than or equal to 60%; a kinked fiber content of less than or equal to 70%; and a metal content of less than or equal to 8 ppm; the prepared cotton pulp has uniform polymeric fiber length, high fiberization rate and short dissolving time.

The present application relates to the technical field of papermaking, in particular to a method for improving the retention rate of white cardboard and white cardboard. The following steps are combined: a high-concentration grinding step: the mechanical pulp used for white cardboard production is treated by high-concentration grinding to reduce the generation of fine fibers and enhance the fiber bonding capacity; a charge adjusting step: a charge adjusting agent such as aluminum sulfate is added to the pulp to neutralize anionic impurities and ensure the efficiency of chemicals; a micro-particle flocculation step: a multi-component micro-particle retention system composed of cationic starch, high molecular weight polymer flocculants and silica sol is added to the charge-adjusted pulp to efficiently flocculate and retain fine components. Through the synergistic effect of source physical control, process chemical environment optimization and terminal efficient capture, the present application can improve the comprehensive retention rate of white cardboard to more than 88%, the core layer retention rate to more than 90%, significantly reduce the production cost, improve the paper quality and the running stability of the paper machine.