1310results about "Pulp material addition processes" patented technology

A composite can include cellulose fiber; and foam binding the cellulose fiber. A method for manufacturing a composite can comprise mixing a plurality of ingredients to form a pre-foam mixture; foaming the pre-foam mixture to produce a foam; mixing the foam with cellulose fiber to form a composite material; and curing the composite material.

A composite can include cellulose fiber and foam binding the cellulose fiber. A method for manufacturing a composite can comprise mixing a plurality of ingredients to form a pre-foam mixture, foaming the pre-foam mixture to produce a foam, mixing the foam with cellulose fiber to form a composite material, and curing the composite material.

The invention discloses degradable coated paper and a preparation method thereof, and belongs to the field of high polymer materials. Aiming at the problem of single function of the existing coated paper, the invention provides the degradable coated paper, the degradable coated paper comprises backing paper and a coated layer, and the coated layer comprises the following components in parts by weight: 50-80 parts of polylactic acid and 10-25 parts of poly (ethylene terephthalate) succinate; the plastic is prepared from the following components in parts by weight: 1-5 parts of biodegradable chitosan, 10-20 parts of modified talcum powder, 0.3-1.0 part of a plasticizer, 0.2-1.0 part of a lubricant, 0.2-0.5 part of an antioxidant and 0.2-0.5 part of a compatilizer. The antibacterial purpose is achieved by selecting the degradable chitosan, and meanwhile the mechanical performance of the coated paper is not affected; the purposes of heat preservation, cost reduction and efficiency improvement are achieved through the modified talcum powder, so that the finally prepared degradable coated paper has multiple functions of degradability, heat preservation and antibiosis; meanwhile, all the used raw materials are biodegradable, so that the environment-friendly significance is higher. The operation is simple, the convenience and the efficiency are higher, and the use prospect is higher.

The invention discloses a high-performance corrugated carton with waterproof and antibacterial functions and a preparation process of the high-performance corrugated carton. The process comprises the following steps: S1, providing a corrugated paperboard substrate; s2, the inner surface and the outer surface of the corrugated board base board are coated with barrier enhancing coating liquid, and barrier enhancing coatings are formed after curing; s3, the composite antibacterial coating liquid is distributed, a composite antibacterial coating is formed after curing, and a composite corrugated board is obtained; and S4, the composite corrugated board is used for manufacturing the corrugated carton. The waterproof performance of the composite corrugated paper board can be improved through the composite antibacterial coating, the composite corrugated paper board is endowed with excellent antibacterial performance, and through cooperation of the barrier reinforcing coating and the composite antibacterial coating, by means of the excellent barrier effect of the barrier reinforcing coating, the waterproof performance of the composite corrugated paper board is improved. The waterproof performance of the composite corrugated board can be further improved while the risk that active oxygen brought by the composite antibacterial coating may damage the performance of the corrugated board substrate can be avoided, the mechanical strength of the composite corrugated board can be improved, and the service life of the composite corrugated board can be guaranteed.

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 present invention discloses a tensile and wear-resistant washed kraft paper and its preparation process, which relates to the technical field of kraft paper. The process includes the following steps: Step 1: Add color paste, waterborne acrylic resin, preservative, reinforcing agent, softening agent, curing agent, and waterproofing agent into a solvent in sequence and stir evenly to obtain a sizing slurry; Step 2: Coat the sizing slurry on the base paper, and successively perform extrusion, ultraviolet light irradiation, first drying, ironing, and second drying to obtain the tensile and wear-resistant washed kraft paper. In this application, by preparing specific reinforcing agent and waterproofing agent and introducing them into the sizing slurry for sizing, the interfacial action between the sizing slurry and the base paper is effectively improved, thereby improving the tensile and wear resistance of the washed kraft paper while enhancing the flame retardant performance; it can achieve the purpose of replacing plastic, leather, and cloth with paper.

The invention belongs to the technical field of electronic materials, and particularly relates to a broadband side wall graphical wave-absorbing honeycomb structure. Through the design mode that the strip-shaped resistive films are arranged at equal intervals according to the width and form the included angle with the honeycomb aperture Z direction to be fully distributed on the inner walls of the honeycomb units in parallel, the spiral-like structure design of resistive film stripes is finally formed on the inner walls of the honeycomb units, and the anisotropy of the effective dielectric constant of the wave-absorbing honeycomb structure is effectively improved; the polarization of the structure is insensitive; in addition, during processing of the structural design, the influence of pattern dislocation caused by process precision is extremely small. And the spiral-like structure design enables alternating impedance to be formed along the aperture direction, so that more times of reflection and absorption are formed on the inner walls of the honeycomb holes due to the arrangement angle of the strip-shaped resistive film after incident waves are incident, the impedance matching with air in a broadband range is effectively improved, and the 2-18GHz ultra-wideband wave-absorbing performance is realized.

The invention discloses a bio-based PHA oil-resistant and moisture-permeable coating for hamburger paper, coated paper and a preparation method, and belongs to the technical field of bio-based high polymer materials and paper-based food packaging. The coating is a PHA aqueous dispersion, and mainly comprises a semi-crystalline matrix PHA and a low-crystallinity or amorphous toughening PHA. The core of the coating is that after the coating is dried to form a film, a functional gradient structure can be spontaneously formed in the thickness direction of the coating: an interface layer close to a paper base is rich in toughening PHA so as to enhance toughness and adhesive force; and the surface layer of the coating is rich in matrix PHA so as to maximize the oil resistance. By means of the functional gradient structural design, the packaging material integrates oil resistance, moisture permeability and flexibility of the packaging material, has the degradable environment-friendly characteristic and is suitable for packaging high-grease food.

The utility model provides a mica paper pulp mixing device, and belongs to the technical field of mica product production equipment. Comprising a reaction kettle, a stirring shaft, an impeller and an outer sleeve, the outer sleeve comprises a pipe body and a gas collecting hood located below the pipe body, a plurality of through holes are formed in the gas collecting hood, the stirring shaft is inserted into the pipe body, the impeller is rotationally connected to the bottom of the reaction kettle in the gas collecting hood, and a ventilation connecting pipe is arranged at the bottom of the reaction kettle and connected with a steam source. An outlet of the ventilation connecting pipe is positioned below the gas-collecting hood; a gap is formed between the stirring shaft and the pipe body. The device has the advantages of low energy consumption and the like.

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 relates to the technical field of fuel cells, in particular to a preparation method of multi-gradient pore structure carbon fiber paper for a gas diffusion layer of a fuel cell and the carbon fiber paper. The preparation method comprises the following steps: carrying out mechanical treatment on artificial fibers, and carrying out solid-liquid separation to obtain mechanically treated artificial fiber slurry; mixing the fiber slurry with nanofibers and surface modified carbon fibers to prepare composite fiber slurry; an inclined wire wet forming process is adopted, the pore structures of the carbon fiber base paper are regulated and controlled by adjusting the proportion of fibers with different sizes, and the carbon fiber base paper with different pore structures is subjected to multi-layer compounding according to a certain gradient of low, medium and high; after compounding, the carbon fiber paper with a multi-gradient pore structure is prepared through the processes of resin impregnation, hot-pressing curing, carbonization, graphitization and the like. The preparation method provided by the invention is simple and convenient in process flow, meets the requirements of high conductivity, high air permeability and high strength of the carbon fiber paper, optimizes the drainage capacity of the battery, and improves the battery performance.

The invention discloses a moisture-proof and pressure-resistant packaging carton and a preparation method thereof, and relates to the technical field of packaging cartons, the structure of the moisture-proof and pressure-resistant packaging carton is sequentially provided with an outer lining, a corrugated core paperboard and an inner lining from top to bottom, and the outer lining, a corrugated core and the inner lining are bonded through polyvinyl alcohol; soaking the prototype paper in a carboxymethyl cellulose aqueous solution, taking out the prototype paper, soaking the prototype paper in a copper sulfate metal ion solution and an aluminum chloride metal ion solution respectively, and performing hot pressing to obtain lining prototype paper and outer lining prototype paper; the preparation method comprises the following steps: adding polyethyleneimine and methanol into deionized water, uniformly stirring, soaking the outer lining prototype paper into the deionized water, heating to 35-36 DEG C, preserving heat, taking out the outer lining prototype paper, soaking the outer lining prototype paper into the solution A, adding glutaraldehyde, reacting at 25-30 DEG C, taking out the outer lining prototype paper, carrying out vacuum drying for 30-45 minutes, coating the surface of the outer lining prototype paper with the solution B, and carrying out vacuum drying to obtain the outer lining.

The invention relates to the field of manufacturing of carbon fiber paper, in particular to a continuous preparation method and device suitable for continuous carbon fiber paper. The method comprises the following steps: preliminarily dispersing different types of carbon fibers in a device, further mixing and dissociating under the action of a dispersing agent, diluting, dispersing and homogenizing to obtain stable carbon fiber slurry. Then, in a designed continuous production device, a resin net is adopted as a receiving carrier, a carbon fiber paper wet green body is formed from the slurry under the vacuum adsorption effect, and continuous carbon fiber raw paper is obtained through specific step treatment and drying. And finally, performing carbonization treatment under different conditions to obtain a final carbon fiber paper product.

The present invention relates generally to the field of polymer dispersion coated, paper-based flexible packaging materials. In particular, the present invention relates to improving the barrier properties of polymer dispersion coated 5 paper-based flexible packaging materials. Embodiments of the present invention relate to a process for improving the barrier properties of polymer dispersion coated paper-based flexible packaging materials comprising the step of applying an Al2O3 coating to at least one surface of the dispersion coated paper-based flexible packaging materials, for example by using atomic layer deposition; and an Al2O3-coated paper material 10 obtainable by such a process.

The invention belongs to the technical field of new materials, and discloses an antibacterial agent, a preparation process and a preparation process of antibacterial decorative paper.The antibacterial agent is prepared from 40-50 parts of tea polyphenol and 20-50 parts of abelmoschus manihot gum. The antibacterial agent prepared by selecting tea polyphenol as a main antibacterial substance is applied to an impregnation process of impregnated bond paper of a veneer artificial board, the veneer artificial board is endowed with spectral antibacterial performance, and compared with chemical synthetic antibacterial agents and metal antibacterial agents, the antibacterial agent has the characteristics of high efficiency, safety, no toxicity and lasting antibacterial property. The antibacterial agent provided by the invention has excellent uniform dispersibility in melamine glue, UV paint and water-based paint, and the original production process of facing artificial boards and wood floors is not changed. According to the test standard of JC / T2039-2010 antibacterial mildew-proof wooden decorative sheet, the antibacterial performance of the product on staphylococcus aureus and escherichia coli can easily reach more than 99.99%, and the antibacterial durability of the product after 5000 times of washing is also more than 99.99%.

The invention relates to a production system and a production method of a polyhydroxyalkanoate paper-plastic composite material. The production system comprises an unwinding mechanism, a coating device, a drying device, a pressing device, a winding mechanism and a post-processing device, wherein the unwinding mechanism is used for conveying base material paper; the coating device is used for coating the base material paper conveyed out by the unwinding mechanism and comprises an extrusion type coating machine head; the drying device is used for heating and drying the coated base material paper; the pressing device is used for pressing the dried base material paper; the winding mechanism is used for storing the laminated base material paper; and the post-processing device is used for performing post-processing on the laminated base material paper, and the post-processing device comprises an elastic roll mechanism and a drying box. According to the preparation method, an extrusion type coating process is adopted, extrusion granulation, high-temperature melt extrusion casting or film spraying forming of the polyhydroxyalkanoate is not needed, the degradation risk of the polyhydroxyalkanoate is avoided, degradation of the polyhydroxyalkanoate is reduced, and the production cost is reduced.

A self-stabilized glyoxalated polyacrylamide (gPAM) resin composition is disclosed. The gPAM resin composition consists essentially of an aqueous reaction product of a cationic polyacrylamide (cPAM) prepolymer and glyoxal carried out in an aqueous reaction mixture having a total solids of less than a critical concentration of the gPAM resin and a pH of at least about 7.5. The cPAM prepolymer comprises a weight average molecular weight (Mw) of at least about 5,000 Da and a cationic monomer content of at least about 4, alternatively at least about 10 mol %. The reaction product is prepared without addition of any acid. The gPAM resin composition maintains a substantially single phase for a stability period of at least about 1 day after preparation, without the addition of any acid or other stabilizing compounds. Methods of preparing and using the gPAM resin composition are also disclosed.

The invention discloses a water-based paper barrier coating and a method for improving the barrier property of a packaging material. The packaging material includes a substrate having a coating to provide a packaging material having tailored water vapor permeability, oxygen permeability or permeability, grease resistance properties, and light properties.

The invention discloses a film transfer and immersion type dual-purpose sizing machine, and relates to the technical field of sizing machines, the film transfer and immersion type dual-purpose sizing machine comprises a sizing machine shell, an upper sizing roller is arranged at the upper end of the interior of the sizing machine shell, a lower sizing roller is arranged at the lower end of the interior of the sizing machine shell, and sizing beams are arranged at the front end and the rear end of the interior of the sizing machine shell; and a filtering mechanism for treating glue is arranged in the collecting box. According to the membrane transfer and soaking type dual-purpose sizing machine, scraped glue is discharged through a discharging pipe and collected through a collecting box, after glue collection, the glue is filtered through a filter screen and collected to the lower end of the interior of the collecting box, and after the glue is adsorbed through the capillary action of paper, dust on the surface of the paper can be left in the glue; and the glue is filtered through the filter screen, so that the quality of the glue during recycling is guaranteed, and the overall stability during use is improved.

The invention relates to the technical field of papermaking, and particularly provides label release paper and a preparation method thereof.The label release paper sequentially comprises a release layer, a bottom coating layer and a base material paper layer from top to bottom, and the release layer comprises polydimethylsiloxane; the bottom coating layer comprises an organic silane coupling agent; the base material paper layer sequentially comprises a surface layer, a modified paper layer and a bottom layer from bottom to top; wherein the surface layer and the bottom layer are both glassine paper; the density of the glassine paper of the surface layer is 1.15-1.20 g / cm < 3 >; and the density of the glassine paper at the bottom layer is 1.05-1.10 g / cm < 3 >. Polydimethylsiloxane is selected as the release layer, the release force of the adhesive can be remarkably reduced due to the fact that polydimethylsiloxane has ultralow surface energy, and the crosslinked polydimethylsiloxane layer is high in chemical inertness, low in heat resistance and moisture migration resistance, not prone to migration after being stored for a long time and easy to form chemical combination with the bottom coating layer, so that the adhesive force is improved.

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.

There is provided a multi-layered paperboard (200, 300) comprising a first cellulose fibre-based layer (201, 301) and a second cellulose fibre-based layer (202, 302), which second layer (202, 302) has an inner surface facing in the direction of the first layer (201, 301) and an outer surface facing in the opposite direction, wherein the density of the second layer (202, 302) is below 550 kg / m3 and lower than the density of the first layer (201, 301) and wherein an additive (204, 304) selected from the group consisting of starch, fines, MFC, CMC and PVOH is added to the outer surface of the second layer (202, 302), with the proviso that no further cellulose fibre-based layer is provided on the outer surface of the second layer (202, 302).

The invention provides a preparation method of a glue-free repulping multi-layer high-barrier packaging material, which comprises the following steps: taking a first paper base and a second paper base, preparing a barrier coating, and adding a plasticizer into the barrier coating; coating the first surface of the first paper base with a barrier coating to form a first paper base barrier layer with a two-layer structure; the second surface of the second paper base is coated with the mixture to form a second paper base barrier layer with a two-layer structure; the high-barrier packaging material is prepared by making one side of the barrier material face to face, overlapping and hot-pressing, further, the plasticizer is a bio-based plasticizer, the formed high-barrier packaging material is of a two-layer split structure through design, the surfaces of the two split layers are both coated with the barrier material, and the high-barrier packaging material is obtained. The same barrier material is plasticized and combined by using a hot pressing process, so that a synergistic and associated effect from addition and use of an environment-friendly material to a processing process is formed, the interlayer binding force of the material is effectively improved, the problems of swelling and cracking of the material are prevented, and the comprehensive properties such as moisture, oxygen and re-pulping are improved.

The invention provides a paperboard and a preparation method thereof. The preparation method comprises the steps that paper pulp is prepared, the paper pulp comprises core layer paper pulp, face lining layer paper pulp, face layer paper pulp and bottom layer paper pulp, and microfibrillated cellulose and chemical pulp are added to at least one of the face lining layer paper pulp and the bottom layer paper pulp to be ground together before grinding; making raw paper from the paper pulp; and coating surface glue on the surface of the surface layer of the body paper. According to the preparation method of the paperboard provided by the embodiment of the invention, the adding point of the MFC applied to the high-speed paper machine system is determined, the influence on the paper machine system is reduced, and dehydration of the pulp and operation of the paper machine are ensured. By combining the papermaking characteristics of a multi-layer paper machine, the surface lining layer and the bottom layer applied to the paper sheets can effectively improve the interlayer bonding strength between the paper sheets, improve TV-16, reduce the use amount of spraying starch in the conventional process or cancel the spraying starch, and improve the operation of the paper machine.

The invention relates to a method for applying starch to a paper or paperboard web, the method comprising the steps of: providing an aqueous suspension comprising starch particles and at least 1 wt %, based on the dry solid content of the suspension, of an amphiphilic polymer, creating a foam of the aqueous suspension, and applying the foam to the paper or paperboard web. The invention further relates to a paper or paper board product obtained by the method.

The invention discloses a mineral-based easily-recyclable compostable water-based barrier coating and a preparation method thereof, and belongs to the technical field of paper-based packaging materials. The coating takes water as a carrier, and is composed of a biodegradable film forming system and a designed graded lamellar mineral system composed of three minerals with different sizes and morphologies. The mineral system comprises flaky kaolin with specific morphology and size, non-asbestos grade flaky talc and fully stripped sodium montmorillonite. A mineral sheet layer forms a compact parallel spreading barrier path in a coating through a specific coating and drying curing process, and excellent water vapor and oxygen barrier, water resistance and oil resistance are realized under the low dry weight of 8-15g / m by combining with a pH value response type reversible cross-linking system. The coating system does not contain polyvinylidene chloride and perfluoroalkyl and polyfluoroalkyl substances. The paper-based material coated with the coating is easy to defibrillate and recover under the standard alkaline warm water condition, the fiber recovery rate is high, and meanwhile, the whole material meets the industrial composting requirement.

The present invention relates to the field of fuel cell technology, and in particular, to a method for preparing carbon fiber paper for a fuel cell gas diffusion layer. The method comprises the following steps: adding phenolic resin, dispersant, anti-settling agent, asphalt and graphitization template agent into a mixed solvent for mixing and dispersing to obtain a resin impregnation solution; immersing carbon fiber base paper into the resin impregnation solution for impregnation, drying, and then subjecting to hot pressing curing and graphitization treatment to obtain a final product. Asphalt is used to replace part of the phenolic resin, and a graphitization template agent is introduced to reduce the graphitization temperature of the carbon fiber paper and improve the graphitization degree of the resin carbon. By optimizing the formula of the resin impregnation solution, the problem that asphalt and graphitization template agent are difficult to disperse and easy to settle in the phenolic resin impregnation solution is solved, and the asphalt, phenolic resin and graphitization template agent are loaded on the carbon paper base paper by a one-step impregnation method. The method has the advantages of simple process, low graphitization temperature and low energy consumption, and the prepared carbon fiber paper has good conductivity.

This invention discloses a bio-based PHA oil-blocking and moisture-permeable coating for hamburger paper, the coated paper, and its preparation method, belonging to the fields of bio-based polymer materials and paper-based food packaging technology. The coating is an aqueous dispersion of PHA, mainly comprising semi-crystalline matrix PHA and low-crystallinity or amorphous toughening PHA. Its core feature is that after the coating dries and forms a film, it spontaneously forms a functional gradient structure along the coating thickness direction: the interfacial layer near the paper substrate is rich in toughening PHA to enhance toughness and adhesion; while the surface layer is rich in matrix PHA to maximize oil-blocking performance. Through this functional gradient structure design, this invention balances the oil-blocking, moisture-permeable, and flexible properties of the packaging material, and possesses biodegradable environmental characteristics, making it suitable for high-oil food packaging.

The invention relates to a paper filter material as well as a preparation method and application thereof. The preparation method of the paper filter material comprises the following steps: S1, preparing flash drying pulp, mercerizing pulp, paper pulp dried in a drying cylinder and water into pulp; s2, carrying out in-pulp sizing on the pulp obtained in the step S1, and then forming, dehydrating and drying to obtain raw paper; and S3, carrying out surface sizing on the raw paper in the step S2 by adopting starch, and drying to obtain the paper filter material. The paper filter material obtained through the preparation method keeps good air permeability and has high bulk, a paper filter tip rod made of the paper filter material serving as a filter element has low suction resistance and good suction resistance stability, an existing cellulose acetate fiber filter tip rod can be replaced, and production cost, environmental protection and suction experience are all considered.

The invention relates to a dry strength composition for manufacture of paper, board or the like. The dry strength composition comprises, as a mixture, at least one anionically derivatized polysaccharide, and cationic starch having an amylopectin content > 80 weight-%. The anionically derivatized polysaccharide and the cationic starch provide the composition with a charge density in the range of 0.1 — 1.5 meq / g, when measured at pH 2.8, and -0.1 — -3 meq / g, preferably -0.3 — -2.5 meq / g, more preferably -0.5 — -2.0 meq / g, when measured as an aqueous solution, at pH 7.0. The invention relates also to a use of the said composition and to a method for manufacturing paper, board or the like.