331results about "Pulp material addition processes" patented technology

The invention discloses a PHA-acrylic acid structural unit water-based dispersion based on interface engineering regulation and control, a preparation method thereof and application of a paper-based barrier coating, and belongs to the technical field of high polymer materials, interface engineering and water-based coatings. The stable interface layer is constructed in situ between the crystalline PHA and the acrylic resin through the amphiphilic polymer, so that the problems of poor compatibility and film forming defects of a bio-based material are effectively solved. The dispersion can realize excellent waterproof, oil-proof and gas barrier effects by only needing a relatively low coating weight, and the material consumption is remarkably reduced. The unique gradient structure of the coating has excellent mechanical adhesive force and efficient re-pulping and recycling characteristics, and the technical defect that a traditional barrier coating is difficult to recycle is overcome. And an ideal solution with high performance and high safety is provided for green packaging.

The invention relates to the field of packaging materials, and discloses low-temperature heat-sealing water-based coated paper and a preparation method and application thereof.The water-based coated paper comprises a base paper layer and a water-based coating, and the water-based coating comprises water-based ethylene-acrylic acid copolymer emulsion, modified nano-silica, a coalescing agent and water; a cardanol derivative is introduced into the water-based ethylene-acrylic acid copolymer emulsion as a functional component; the cardanol derivative is prepared by reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and then grafting with acryloyl chloride. The preparation method comprises the following steps: reacting epoxidized cardanol with 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide; the modified nano silicon dioxide is prepared by mixing aminated nano silicon dioxide and chitosan and adding a cross-linking agent prepared by grafting phytic acid and ethylene glycol diglycidyl ether. The water-based coating paper prepared by the invention overcomes the defects that the existing BOPP film is not environment-friendly, and the conventional coating paper is high in heat sealing temperature and easy to stick; meanwhile, good mechanical properties, water resistance and flame retardance are achieved.

The invention discloses a bacteriostatic and antiviral bamboo pulp paper-based sanitary isolation bag as well as a preparation method and application thereof, and belongs to the field of functional paper-based packaging materials. The isolation bag takes bamboo pulp fiber paper as a base material, and the surface of the isolation bag is coated with a water-based polyhydroxyalkanoate functional coating. According to the preparation method, a special polyphenol derivative-chitosan quaternary ammonium salt-nano zinc oxide organic-inorganic hybrid factor is introduced, and the problem of agglomeration of nano particles is effectively solved by utilizing the special bridging effect of polyphenol, so that high-density cation capture and oxidation inactivation sites are constructed on the surface of the coating. Compared with the prior art, the method has the advantages that the method does not need to depend on organic fluorine compounds, and the excellent waterproof and oil-proof barrier effect and the efficient inactivation of viruses can be achieved only through the extremely low coating amount. In addition, the isolation bag has unique environmental chemical responsiveness, can be efficiently dissociated under the alkaline condition to facilitate repulping recovery, can be completely biodegraded in the natural environment, and perfectly considers the requirements of biological safety protection and green environmental protection.

A method, system, and computer program product are described capable of controlling an industrial based chemical process through accessing sensor data, pre-processing accessed sensor data through an automated process, forming an initial prediction model of the chemical process, and automatically determining linearity or non-linearity of the initial prediction model. As a function of quantitatively measured linearity, being non-linear, quasilinear, or linear, automatically train the initial prediction model, then deploy the trained prediction model in a manner that controls the subject chemical process at the industrial plant, including optimizing consumption of a certain resource. Data-driven modeling of non-linear, continuous-like industrial or chemical processes results.

The invention relates to an impregnated paper production quality detection method and system based on deep learning, and the method comprises the following steps: S1, obtaining an industrial camera image flow, sensor and process parameters, and event and work order information, and constructing a synchronous data packet; s2, preprocessing the synchronous data packet to obtain preprocessed image data, process data and an ROI mask; s3, obtaining a detection frame set and a segmentation mask set based on multi-model AI detection and segmentation according to the preprocessed image data, the process data and the ROI mask; s4, segmenting the mask set according to the detection frame set, and performing track clustering along the paper feeding direction to form a defect event flow; s5, on the basis of the defect event stream, performing online quality prediction and root cause analysis, and obtaining future interval quality prediction and key factor sorting; and S6, according to future interval quality prediction and key factor sorting, adaptive process optimization is carried out, and an optimal control instruction is obtained. According to the invention, the detection accuracy and fineness are effectively improved, and intelligent identification and cross-frame tracking of defects are realized.

The invention discloses dip-coating equipment and a dip-coating method for processing impregnated decorative paper, which are used for realizing uniformity control in the impregnation process of the decorative paper and solving the problem of excessive or insufficient local glue amount in the existing impregnation mode. On one hand, the dip-coating equipment for processing the impregnated decorative paper comprises a glue tank, a paper feeding roller, an impregnating mechanism, a smearing mechanism and a glue scraping mechanism are sequentially arranged on the glue tank from one side to the other side of the glue tank, and the paper feeding roller is arranged above one side of the glue tank and can rotate in the circumferential direction of the paper feeding roller; the dipping mechanism comprises a dipping roller, and the dipping roller is arranged in the glue tank; the coating mechanism is arranged above the glue tank, the coating mechanism comprises two groups of brush rollers, the two groups of brush rollers are symmetrically arranged up and down, and the two groups of brush rollers are driven by a third power device to rotate in the circumferential direction of the brush rollers; the whole glue scraping mechanism is arranged above the glue tank, the glue scraping mechanism comprises two groups of scraping plates, and the two groups of scraping plates are symmetrically arranged up and down.

The invention discloses moisture-proof and moisture-retaining frame paper and a preparation method thereof, and relates to the technical field of frame paper.The moisture-proof and moisture-retaining frame paper comprises a body paper layer, the body paper layer is provided with a water-based moisture-retaining coating, the water-based moisture-retaining coating is formed by drying coated water-based moisture-retaining coating liquid, and the water-based moisture-retaining coating liquid is coated on the body paper layer. A composite aluminum foil layer or a transfer aluminum plating layer is also arranged on the water-based moisture-retaining coating; the water-based moisture-retaining coating liquid comprises starch, acrylic acid, organic bentonite, alkali, an initiator, a cross-linking agent and distilled water; wherein the mass ratio of the starch to the acrylic acid to the organic bentonite is (7-8): (15-20): (1-1.5); the mass of the distilled water is 10-12 times of the total mass of the starch, the acrylic acid and the organic bentonite; the mass of the initiator is 0.5-0.8% of that of the acrylic acid; the mass of the cross-linking agent is 0.1-0.2% of that of the acrylic acid; in terms of-OH, the mole number of the alkali is 70-80% of that of the acrylic acid. The frame paper is provided with the water-based moisture-retaining coating and is excellent in moisture-proof and moisture-retaining performance.

The invention discloses a fiber synergistic copolymer as well as a preparation method and application thereof, and belongs to the technical field of papermaking chemicals and high polymer materials. Aiming at anion garbage interference caused by deepening of closed circulation of white water in the papermaking industry and green compliance challenges caused by replacing plastic with paper, the copolymer adopts a specific polycarboxylic acid and trace cationic monomer structure-effect design, and has excellent anti-interference capability and permeability. In the wet-end in-pulp enhancement, the enhancement effect of the additive can be superior to that of a traditional high-molecular-weight additive only by a relatively low addition amount, and water filtration and retention are remarkably improved; in a surface sizing and pulp molding hot pressing process, the rigidity and the water-resistant size stability of a product can be greatly improved through a unique cross-linking mechanism. According to the scheme, the industrial pain point of low enhancement efficiency in a complex environment is effectively solved, and the product does not contain organic fluorine and completely meets the requirements of environmental protection and sustainable development of a high-performance fiber-based material.

The utility model provides impregnated paper impregnation equipment which comprises an impregnator body, the impregnator body comprises a rack, a winding roller and an unwinding roller, the winding roller and the unwinding roller are arranged on the rack, a glue pool is arranged between the winding roller and the unwinding roller, and a first guide roller and a second guide roller which are used for guiding impregnated paper to enable the impregnated paper to be impregnated are arranged in the glue pool. The first stirring component is positioned in the glue pool, and the height of the first stirring component is lower than that of impregnated paper at the bottoms of the first guide roller and the second guide roller; the first stirring part comprises a first stirring rod rotationally connected to the bottom of the glue pool and a motor arranged below the glue pool and used for driving the first stirring rod to rotate. According to the impregnated paper impregnation equipment provided by the utility model, through the double-layer stirring design of the first stirring part and the second stirring part, synchronous dynamic regulation and control of glue on the upper surface and the lower surface of impregnated paper are realized, and viscosity layering of the glue is effectively eliminated.

The invention discloses an in-situ doped ZnO paper-based insulating material and a preparation method thereof, and belongs to the technical field of paper-based special materials in paper industry. The method disclosed by the invention comprises the following steps: mixing and stirring zinc chloride and water to obtain a zinc chloride hydrated eutectic solvent; then soaking the porous base paper in a zinc chloride hydrated deep-eutectic solvent for swelling treatment to obtain gelatinized base paper; immersing the gelatinized raw paper into an ethanol / water anti-solvent system for regeneration treatment to obtain regenerated raw paper; then dipping the regenerated raw paper in alkali liquor for in-situ deposition treatment to obtain raw paper with ZnO micro-nano particles loaded and doped on the surface; and performing post-treatment on the body paper with the surface loaded and doped with the ZnO micro-nano particles to obtain the in-situ doped ZnO paper-based insulating material. According to the method disclosed by the invention, in-situ doping of the ZnO micro-nano particles is successfully realized in the densified base paper, and the dielectric property is further remarkably improved by cooperating with the densification effect.

The invention relates to the technical field of general papermaking, in particular to treatment-free CTP plate lining paper and a preparation method thereof.The treatment-free CTP plate lining paper at least comprises a paper base layer, a reinforcing layer and a surface coating, and the paper base layer contains natural cellulose; the reinforcing layer is located between the paper base layer and the surface coating, the reinforcing layer is of a net-shaped structure obtained through coating based on a micro gravure coating technology, a first coating forming the reinforcing layer contains a substance forming hydrogen bonds with cellulose, the thickness of the reinforcing layer is 5-18 microns, and the peak-valley difference of the reinforcing layer is smaller than 8 microns; the thickness of the surface coating is at least 1.2 microns, and a second coating forming the surface coating contains silicone oil.

The invention provides a sheet manufacturing apparatus which reduces the supply residue of powder with a simple structure. A sheet manufacturing apparatus (1) is characterized by comprising: a supply unit (200) for supplying a powder; a mixing unit (33) for mixing the fibers and the powder to form a mixture; a stacking unit (50) that stacks the mixture to form a web W; and a forming unit (70) that compresses the material sheet W to form a thin sheet, and the supply unit (200) is provided with: a cylindrical container that stores the powder; a cylindrical inner wall (221) into which the cylindrical container can be inserted; a holding section (220) capable of coming into contact with the cylindrical container; and a driving part (230), when the cylindrical container is inserted into the holding part (220), the holding part (220) and the driving part (230) hold the cylindrical container, a plurality of first convex parts (336) are arranged on the roller surface of the driving part (230), a plurality of second convex parts (317) are arranged on the outer surface of the cylindrical container, and the plurality of first convex parts (336) are embedded with the plurality of second convex parts (317).

The utility model relates to the technical field of glue dipping of decorative paper, and discloses a self-drying paper gluing device which comprises a gluing rack and a glue dipping pool installed at the inner bottom of the gluing rack, and a gluing mechanism for gluing paper and a glue scraping mechanism for scraping glue on the paper are arranged in the glue dipping pool; through cooperation of the gluing mechanism, the glue scraping mechanism, the drying flow guide box and the fan module, the surface of paper can be evenly glued through the gluing mechanism, a glued glue layer is scraped to be flat under the action of a scraping plate of the glue scraping mechanism, it is guaranteed that the thickness of the glued glue layer is even, and the situation that due to excessive glue, the thickness of the glue is not uniform during drying is avoided; and meanwhile, the fan module blows air onto the glued paper after heating the air through the drying flow guide box, and preheating drying and reheating drying are performed on the paper, so that the adhesion strength of glue and the paper is guaranteed, and the quality of the glued paper is improved.

The invention discloses an environment-friendly dyeing process method for paper products, and aims to solve the problems that a traditional environment-friendly dyeing process is large in chromatic aberration fluctuation, unstable in fastness and poor in adaptability of difficult-to-dye paper types. The method comprises the following steps: establishing a paper physical property database based on near infrared spectrum imaging and liquid absorption rate test; calculating an optimal dye liquor concentration gradient, dipping time and temperature through a dye penetration kinetic model and a Bayesian optimization algorithm; gradient permeation dyeing is carried out in the continuous dye vat array by adopting natural vegetable dye; a tannic acid-chitosan composite cross-linking agent is introduced for bio-based color fixation; and closed-loop self-adaptive adjustment is realized by combining hyperspectral imaging online detection and feedback regulation and control. According to the technical scheme, the dye uptake is remarkably increased to 91% or above, the rubbing fastness reaches 4.5 level, the color uniformity and batch consistency are ensured in high-speed continuous production, no heavy metal mordant exists in the whole process, the biodegradability of wastewater is high, and the clean production requirement is met.

This invention relates to a method for manufacturing paper or paperboard from a fiber suspension, the method comprising the following steps: a) injecting a P3 polymer into a cellulose fiber suspension; b) forming paper or paperboard; c) drying the paper or paperboard. Prior to step a), a P3 polymer is prepared from a water-soluble P1 polymer of at least one nonionic monomer selected from acrylamide, methacrylamide, N,N-dimethylacrylamide, and acrylonitrile. The P1 polymer is subjected to a Re1 reaction to obtain a P2 polymer, which is then subjected to a Re2 reaction to obtain the P3 polymer. The P3 polymer is then subjected to a Re2 reaction. The e1 reaction is injected into the fiber suspension within 24 hours of the start of the reaction; the -Re1 reaction comprises the preparation of a P2 polymer containing an isocyanate functional group by reacting (i) an alkali metal hydroxide and / or an alkaline earth metal hydroxide, (ii) an alkali metal hypohalide and / or an alkaline earth metal hypohalide and (iii) a P1 polymer for 10 seconds to 60 minutes; the -Re2 reaction comprises the preparation of a P3 polymer by reacting (iv) a compound containing at least one aldehyde functional group or a compound capable of generating at least one aldehyde functional group with (v) a P2 polymer containing an isocyanate functional group.

The present invention relates to a process for preparing a renewable fiber product web from a fibrous raw material, by utilizing dry-forming technology, whereby the bonding of the fibers takes place without adding large quantities of water, optionally while applying compression, causing the creation of fiber-fiber hydrogen bonds. The invention further relates to the thus formed fiber product.

The invention discloses temperature response type high-temperature-resistant release paper and a preparation method thereof. The release paper comprises a first release layer, a resin isolation layer, a base material layer, a resin punching layer, a temperature-sensitive layer and a second release layer which are sequentially stacked. The PNIPAAm temperature-sensitive layer is additionally arranged on the outer side of the perforated resin isolation layer, when the temperature-sensitive layer is lower than LCST (lowest critical compatibility temperature), molecular chains of the PNIPAAm temperature-sensitive layer are in a stretched state and are large in size, the perforated holes can be blocked, and water circulation can be prevented, when the temperature is higher than LCST, the molecular chains of PNIPAAm are in a contracted state and are small in size, and the perforated holes can be blocked by the PNIPAAm temperature-sensitive layer. Moisture can freely enter and exit through the exhaust holes, so that the use of the release paper is not influenced, and higher temperature can be resisted; the method can solve the problem that the water content of the paper is greatly changed due to the fact that the perforated release paper is influenced by external humidity.

The application discloses a blister white cardboard and blister packaging suitable for on-site large-ink-volume printing of narrow-edge blister, and belongs to the papermaking technical field.The technical scheme is as follows: from top to bottom, a coating layer, a surface sizing layer and a base paper layer are sequentially arranged;the coating layer comprises a surface coating layer and a pre-coating layer;the surface sizing layer adopts a mixture of enzyme-converted starch and spherical light calcium carbonate as a sizing agent and is coated on the surface of the base paper through film transfer; and the base paper layer comprises a surface fiber layer, a core fiber layer and a bottom fiber layer.The application solves the problems that the on-site ink, water-based blister oil, PET material bubble shell and blister heating time less than 2S cannot meet the requirement that the tearing area is greater than 90%, and good economic and social benefits are achieved.

The present invention relates to a process of preparation of a non-anionic functionalized polymer, said functionalised polymer and its use, in particular in wastewater treatment as a coagulant, or in pulp and paper industry as retention aids, or in specialties such as home and personal care composition as conditioner.

The invention relates to the technical field of preparation of special paper in the papermaking industry, in particular to composite formaldehyde removal paper and a preparation method thereof. The composite formaldehyde removal paper is of a three-layer structure, the middle layer is a paper base, the upper layer is a porous MOF catalytic formaldehyde removal agent coating, the lower layer is a reaction type formaldehyde removal agent coating, and the coatings are attached to the paper base through two-side blade coating. According to the method, the saturation bottleneck of single adsorption is overcome fundamentally, the porous MOF catalytic material and the chemical reaction type formaldehyde removal agent are innovatively combined, and a triple synergistic formaldehyde removal mechanism of physical adsorption, catalytic oxidation and chemical fixation is formed.

A system (100) for manufacturing a fiber web (1) is proposed, comprising a distributor (2) and a headbox (3) for wetting fibers to form the fiber web (1). A tube bundle (4) is provided between the distributor (2) and the headbox (3) for introducing a fiber suspension from the distributor (2) into the headbox (3). A valve (5) is arranged on a plurality of tubes (4.1) at the lateral edges of the tube bundle (4) for selectively allowing the fiber suspension to pass from the distributor (2) into the headbox (3) or a substitute liquid to pass from a liquid supply (6) into the headbox (3). Furthermore, a method for manufacturing a fiber web (1) is proposed.

A method and system (100) for producing a bonded air-laid blank (10) are disclosed. PVOH-treated natural fibers and a polymer binder are introduced into a forming head (110). The PVOH-treated natural fibers and the polymer binder are captured as an unbonded air-laid web (20) on a conveyor (120) arranged in connection with an outlet (113) of the forming head (110). The unbonded air-laid web (20) to at least partly melt the polymer binder and bind the PVOH-treated natural fibers to form a bonded air-laid blank (10). The bonded air-laid blanks (10) produced by the method and system (100) generate less lint or dust in the form of non-bonded natural fibers.

The invention discloses multifunctional composite kraft paper and a preparation device, and the multifunctional kraft paper comprises a base material layer which is used as a supporting main body; the aromatic layer is fixed on one surface of the base material layer in a coating manner, fine and dense micropores are distributed in the base material layer in a staggered manner, and the aromatic layer permeates into the micropores and forms mechanical interlocking with the base material layer; the flame-retardant layer is positioned on one surface, deviating from the aromatic layer, of the base material layer and is fixedly connected with the base material layer in a thermocompression bonding fixing manner; the anti-static layer is located on the side, away from the base material layer, of the flame-retardant layer and is fixedly connected with the flame-retardant layer in a bonding mode, various layer structures are matched with one another, the function of kraft paper can be increased, and the connection strength between different functional layers is improved by adding an interlocking structure.

The invention provides playing card paper and a preparation method thereof. The preparation method comprises the following steps: providing raw paper; carrying out primary sizing on the surfaces of the two sides of the raw paper respectively; pre-drying the paper subjected to the primary sizing; and carrying out secondary sizing on the surfaces of the two sides of the pre-dried paper respectively. According to the preparation method of the playing card paper provided by the embodiment of the invention, by designing a two-time sizing process and controlling parameters such as pre-drying moisture between the two-time sizing, the production efficiency is improved, meanwhile, the beating resistance of a paperboard is improved, the effective service life of playing cards in actual use (such as shuffling, dealing and hand passing) is prolonged, and the production cost is reduced. It is ensured that the playing cards are not prone to deformation, wrinkles, creases and other failure problems in the high-frequency using process, and the high-frequency requirements of professional players, entertainment venues and the like for the durability of the playing cards are met.

The utility model discloses gluing equipment for impregnated paper processing, which comprises a heat preservation pool, a glue pool and a first positioning roller, the heat preservation pool is arranged on the outer side of the glue pool, the first positioning roller is rotatably arranged on the inner side of the glue pool, a gluing assembly is arranged at the top of the heat preservation pool, and the gluing assembly is convenient for quickly gluing and rolling impregnated paper. An upper scraping plate, a lower scraping plate and a scraping strip are arranged above a glue pool, and redundant glue on the two faces of the impregnated paper coated with glue is scraped off, so that the glue on the impregnated paper is more uniform; the first baking plate and the second baking plate are arranged above the glue pool, the two faces of the impregnated paper subjected to glue scraping are baked and rapidly dried, and the impregnated paper can be rapidly dried and rolled.

The invention relates to a method for improving the strength properties of a nonwoven material. The method includes forming a nonwoven web comprising cellulose-based fibers, and optionally drying the nonwoven web. A strength composition is applied to the nonwoven web. The strength composition comprises (i) a glyoxalated polyacrylamide and (ii) a natural polymer selected from the group consisting of non-charged and cationically charged polysaccharides, non-charged and cationically charged polysaccharide derivatives, and any mixture thereof. The invention also relates to the nonwoven material obtained and to the use of the strength composition.

The utility model relates to the technical field of paper production, in particular to a finished paper water repellent agent adding device which comprises a fixing frame, a material adding assembly is arranged at the top of the fixing frame, the material adding assembly comprises a fixing plate, the fixing plate is fixedly connected to the top of the fixing frame, a material adding box is fixedly connected to the interior of the fixing plate, and the material adding box is fixedly connected to the top of the fixing frame. And a feeding hole is formed in the top of the feeding box. According to the finished paper water repellent agent adding device, by installing the material adding assembly, when a water repellent agent is prepared, various materials are firstly put into the material adding box, then the adding amount of the various materials can be seen through an observation window and scale marks, when the adding amount is small, the materials can be continuously added to a proper amount, and when the adding amount is too large, the adding amount of the materials can be accurately adjusted. When the water repellent agent preparation device is used, only the control valve I needs to be opened to discharge and collect redundant materials, so that excessive or too small preparation amount of the materials can be prevented, the influence on a finished water repellent agent product is avoided, and the practicability of the device is improved.

The invention discloses a reinforcing and protecting material for paper cultural relics and application of the reinforcing and protecting material. According to super-hydrophobic treatment liquid, silicon dioxide nanoparticles are modified through a silane coupling agent and a perfluoroalkyl trialkoxysilane coupling agent, an extremely low surface energy layer is constructed, and water is effectively prevented; the reinforcing treatment liquid adopts cellulose derivatives to form a hydrogen bond network with paper cellulose, so that the mechanical strength is remarkably improved. The hydrophobic property and the mechanical property are kept stable after dry-heat and damp-heat accelerated aging, and long-term preservation of cultural relics is facilitated. The design of the coating follows the principle of reversibility, the super-hydrophobic layer and the reinforcing layer are microcosmically firm and macroscopically integrally stripped, the super-hydrophobic layer and the reinforcing layer can be removed in a lossless mode through absolute ethyl alcohol and other mild solvents, the surface of the paper is restored to be close to the state before treatment, and a base material is not damaged or the appearance of the base material is not changed.

The present invention relates to the use of a non-anionic functionalized polymer in water or wastewater treatment as a coagulant.