165results about "Retention agents addition" patented technology

The invention discloses a cationic core-shell PHA nano-emulsion reinforcing agent as well as preparation and application thereof, and belongs to the technical field of papermaking chemicals. The problems that a traditional wet strength agent is poor in environmental protection property and difficult to recycle, and a conventional bio-based material needs high-temperature curing and is high in energy consumption are solved. According to the reinforcing agent, low-MFFT bio-based polyhydroxyalkanoate is used as a core, and a positive ion shell layer with strong positive charges is wrapped outside the core. The method has the core advantages that extra high-temperature curing is not needed, the film can be efficiently formed under the conventional 105 DEG C drying condition, and the energy consumption is remarkably reduced; meanwhile, high dry and wet strength and water resistance are achieved, the treated paper has excellent re-pulping recycling suitability, and the industrial pain point that traditional wet strength paper is difficult to recycle is solved.

The invention discloses a silica powder modified paperboard material of embossed frame paper for cigarettes and a preparation method of the silica powder modified paperboard material, and belongs to the field of advanced inorganic non-metallic materials. The material comprises bleached chemical wood pulp, core-shell structure in-situ modified nano silicon micropowder, an auxiliary agent and a latent temperature-sensitive cross-linking agent, a modification system contains a compound silane coupling agent and amino modified organosilane, and a dual network of static triple cross-linking and dynamic secondary cross-linking is formed; the nanometer silicon micro powder is of a core-micro-nano protrusion-shell multilevel structure, a shell layer is thermoplastic resin containing latent epoxy groups, and a double-peak particle size distribution design is adopted. The preparation process is realized through in-situ generation modification, high-speed shearing fusion and an embossing-shaping integrated closed-loop control process, and is adaptive to an existing fourdrinier papermaking production line. The product quantification is 210-220 g / m < 2 >, the transverse stiffness is larger than or equal to 210 mN.m, the embossing retention rate is larger than or equal to 99.5%, after 50 cycles at the temperature of-5 DEG C-40 DEG C and the humidity of 30%-80%, the stiffness is reduced by smaller than or equal to 3%, the barrier property is reduced by smaller than or equal to 6%, the printing adsorption uniformity error is smaller than or equal to 3%, and the barrier property and the environmental protection property are excellent. The method solves the problems of agglomeration, embossing resilience, multi-performance contradiction, poor environmental stability and other pain points of conventional modified filler, realizes the cooperation of low quantification and high performance, conforms to the high-end and green requirements of the tobacco industry, can pass the application of strategic emerging industry priority review channels, and has a wide application prospect.

The invention discloses an acid-neutral nano PHA paperboard reinforcing agent as well as preparation and application thereof, and belongs to the technical field of papermaking chemicals. The reinforcing agent is a bio-based nano water-based emulsion, and the core of the reinforcing agent is that a stable high-positive-charge nanoparticle interface is constructed under an acid-neutral window through the synergistic effect of polyphenol and an amine polymer. The environment-friendly wet strength agent solves the potential safety hazard of the traditional wet strength agent, and does not contain free formaldehyde and epichlorohydrin. The method has the outstanding advantages that the method is completely compatible with a modern papermaking acid-neutral process, and the defect that the similar bio-based technology needs to react under alkalinity is overcome; the adhesive is flexible to apply, can be efficiently used for wet end addition, or can be stably compounded with oxidized starch for surface sizing; the preparation method is simple, efficient and energy-saving, can realize excellent wet strength retention rate and dry strength improvement under the conditions of low addition amount and conventional industrial drying at 105 DEG C, and does not need extra high-temperature curing.

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.

Sanitary tissue products, which may be creped, having non-wood fibers and exhibits a coverage greater than about 5.5 fiber layers and a fiber count-area (C(n)) greater than about 830 million / m2 and / or a coverage greater than about 7.5 fiber layers and / or a coverage greater than a line defined by an expression: Y=0.00767X+3.0 (wherein the fiber coverage is “Y” and wherein a fiber count-area (C(1)) is “X”) are provided.

A drainage-optimized additive composition for papermaking is disclosed. The composition comprises an aqueous media and a glyoxalated polyacrylamide (gPAM) resin having a weight average molecular weight (Mw) of at least about 5 MDa. The composition comprises from about 1.95 to about 2.45 wt. % of the gPAM resin. A method of preparing the composition is also disclosed, and comprises preparing a cationic acrylamide (cAM) prepolymer having at least one predetermined property, and selectively glyoxalating the cAM prepolymer by controlling the concentration of the cAM prepolymer in the aqueous media during glyoxalation in relation to the predetermined property. The method may be carried out in situ during a papermaking process (i.e., as an on-site method). A process of forming paper with the composition also disclosed, and comprises combining the composition with the aqueous suspension of cellulosic fibers, forming the cellulosic fibers into a sheet, and drying the sheet to produce a paper.

The present invention generally relates to methods and compositions for manufacture of tissue, paper, or board and for enhancing retention and drainage thereof. In particular, the disclosure provides methods for enhancing retention and drainage by addition of a retention and drainage aid comprising quick inversion cationic emulsion polyacrylamides (QIC-EPAMS) and polyvinylamine (PVAm) polymers Preparation of paper sheets under these conditions provides improved retention, gravimetric drainage rates, and DDA drainage time, without over-flocculation and allowed for significant decrease in PVAm dosage.

The present invention generally relates to methods and compositions for making tissue, paper or paperboard and for enhancing their retention and drainage. In particular, the present disclosure provides a method for enhancing retention and draining by adding a retention and drainage aid comprising a fast reversed phase cationic emulsion polyacrylamide (QIC-EPAM) and a polyvinylamine (PVAm) polymer. Manufacture of paper under these conditions provides improved retention, gravity drain rate, and DDA drain time without excessive flocculation, and allows for a significant reduction in PVAm dosage.

The present invention relates to a papermaking additive, a method for producing a papermaking additive, and paper. The present invention provides a papermaking additive which has less viscosity increase after long-term storage and exhibits excellent drainage and paper strength effects. A papermaking additive comprising a (meth)acrylamide-based polymer, the (meth)acrylamide-based polymer having starch (a1), (meth)acrylamide (a2), a polymerizable monomer having an amino group (a3), a polymerizable monomer having a carboxyl group (a4), and a polymerizable monomer having a sulfonic acid group (a5) as essential constituent components, the starch (a1) being two or more selected from the group consisting of unmodified starch, oxidized starch, esterified starch, etherified starch, amidated starch, cationized starch, amphoteric starch, and crosslinked starch.

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 invention belongs to the technical field of papermaking, and particularly relates to high-strength corrugated base paper and a production method thereof. The method comprises the following steps: respectively preparing waste paper pulp and natural color chemithermomechanical pulp with 20-35-degree SR beating degree through independent preparation lines; then, mixing the two kinds of pulp in a drifting system according to the proportion of 20-50% of natural color chemimechanical pulp, and adding a ternary retention aid composed of cationic retention aids polyacrylamide with the molecular weight of 8-10 million and cationic retention aids polyacrylamide with the molecular weight of 3-6 million and bentonite; and finally, the mixed pulp is put on a net to be formed, surface sizing is conducted on paper sheets, and sizing paint comprises corn starch, starch converting enzyme, styrene acrylate emulsion, AKD emulsion and aluminum sulfate. Through the synergistic effect of branching pulping, proportion optimization, a special chemical system and surface treatment, high-proportion waste paper replacement is achieved, meanwhile, the paper forming strength is guaranteed and improved, the production cost is effectively reduced, and remarkable economic benefits are achieved.

The invention discloses a method for preparing coffee filter paper by taking coffee grounds as filler, and belongs to the technical field of papermaking. The preparation method comprises the following steps: drying, crushing and sieving coffee grounds, and carrying out ultrasonic dispersion on sieved powder to prepare coffee grounds suspension; the method comprises the following steps: defibering wood pulp, mixing the defibering wood pulp with a wet strength agent solution, a retention and drainage aid and a coffee residue suspension, and then carrying out papermaking, squeezing, drying and water balance treatment to obtain the coffee filter paper. The waste coffee grounds are used as the functional filler, so that the efficient utilization of wastes is realized, the phenomena of resource waste and environmental pollution are reduced, the process is simple, and the preparation cost is low.

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 application discloses a high-heat-conducting electrolytic capacitor paper, which is prepared from the following components in parts by weight: paper base fiber: 40-100 parts; modified ceramic filler powder: 5-25 parts; adhesive: 1-10 parts; and auxiliary agent: 2-15 parts. The application also provides a preparation method of the high-heat-conducting electrolytic capacitor paper. The high-heat-conducting electrolytic capacitor paper has good adsorption and good insulation, and still has very low ESR in the high-frequency working process. The ceramic filler powder and the adhesive are added into the paper base fiber matrix, the ceramic filler powder greatly enhances the heat-conducting performance of the capacitor paper, and the adhesive can effectively improve the strength of the paper, so that the strength requirement of the electrolytic capacitor paper in various processing can be met. Overall, the high-heat-conducting electrolytic capacitor paper has high heat conductivity and high paper strength, and has all the excellent performances of the paper base capacitor paper.

The invention provides low-transmittance tensile decorative paper and a preparation process thereof, and the decorative paper comprises the following raw materials in parts by weight: 55-65 parts of bamboo pulp fiber, 8-12 parts of a nano inorganic composite modifier, 4-6 parts of a bio-based polymer composite enhancer, 3-5 parts of a microencapsulation functional barrier agent and 2.8-4.6 parts of a papermaking functional additive. Wherein the bio-based polymer composite reinforcing agent contains a polyamide-epichlorohydrin three-dimensional network and sodium alginate. According to the invention, basic tensile strength and wet structure stability are obtained based on a polyamide-epichlorohydrin three-dimensional network, a hydrogen bond-chemical crosslinking structure is constructed by sodium alginate and the three-dimensional network, and dry and wet tensile strength of the decorative paper is enhanced; hydrophilic groups of sodium alginate can also be combined with bamboo pulp fibers to fill pores, and are matched with other auxiliaries to reduce light and air transmission, so that the low permeability of the decorative paper is improved.

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

The invention belongs to the technical field of papermaking, and particularly relates to a high-smoothness corrugating medium production process. The production technology comprises the steps that waste paper raw materials are sequentially subjected to repulping through a hydrapulper and slag removal through a high-concentration slag remover and then fed into a discharging tower to be temporarily stored, then treated through a coarse screening system, a low-concentration slag remover and a fine screening system, and qualified pulp is concentrated and then stored in a pulping tower; the pulp is fed into a paper machine through a drifting system, is subjected to two-net overlapping forming through a net part, is subjected to four-roller three-pressure dehydration through a pressing part, is fed into a front drying part for first drying, is subjected to secondary drying through a rear drying part after sizing, and is rolled to obtain a product. According to the production process, the surface smoothness of the corrugating base paper can be remarkably improved without depending on a calender, the friction damage of the corrugating base paper to the corrugating roller is reduced, the service life of the corrugating roller is prolonged, and the production cost is reduced.

A treatment article comprising a fiber, a sizing agent, and a retention aid. The sizing agent comprises a wax or component thereof having an acid value of 10 mg to 220 mg KOH / g as measured according to USP 401. The retention aid comprises a nitrogen-containing polymer independently selected from the group consisting of (i) a nitrogen-containing polymer of Formula I, (ii) a polyethyleneimine, (iii) a polyaminoamide, (iv) a copolymer formed from the reaction product of epichlorohydrin and dimethylamine, and (v) combinations thereof.

To provide a papermaking method for a papermaking raw material using a yield improving system in a papermaking process, wherein the papermaking method can achieve improved yield of the papermaking raw material without causing decrease in freeness and water squeezing property while elevating the addition rate.SOLUTION: By applying a papermaking method where a cationic or an amphoteric water-soluble polymer having a specific composition is added to a papermaking raw material before paper-making, followed by adding an anionic water-soluble polymer having a specific composition and an intrinsic viscosity of 7dl / g or under as measured in a 1 normal saline solution at 25°C, improvement of its yield can be achieved without decreasing freeness. Preferably, the intrinsic viscosity of the cationic or amphoteric water-soluble polymer, measured in the 1 normal saline solution at 25°C, is 15-30 dl / g.SELECTED DRAWING: None

The invention relates to a novel water-soluble polymer as well as a preparation method and application thereof, in particular to application in the field of papermaking.

The application discloses a hollow paper tube and a preparation method and application of the hollow paper tube as a hollow cooling section of a heating cigarette filter, and belongs to the technical field of novel cigarettes. Inorganic fibers and plant fibers are mixed and beaten to obtain mixed fiber pulp, the mixed fiber pulp is treated by soaking in a sodium hydroxide solution, calcium carbonate, an inorganic adhesive and a retention aid are added and stirred uniformly, and then, screen forming, drying and slitting are sequentially performed to obtain raw paper, and the raw paper is spirally formed and rolled into a hollow paper tube. The hollow paper tube can guarantee the flexibility of paper, has good stiffness and resilience, effectively solves the problem that the paper tube is easily deformed irreversibly when being pressed during compounding with a cellulose acetate filter section, and greatly reduces the loss rate of the hollow paper tube during the compounding process.

The invention relates to the technical field of papermaking, in particular to a polyelectrolyte compound for constructing a papermaking filler reinforcement and a papermaking method. The polyelectrolyte compound homogeneous liquid comprises a polyelectrolyte compound and a solvent, and the polyelectrolyte compound is uniformly and stably distributed in the solvent; the polyelectrolyte compound is formed by compounding anionic macromolecules and cationic macromolecules through the charge effect, the particle size of the polyelectrolyte compound is 50 nm to 50 microns, and the electrophoretic mobility is-2.0 * 10 <-8 > m < 2 > (Vs) <-1 > to-0.6 * 10 <-8 > m < 2 > (Vs) <-1 > or 0.5 * 10 <-8 > m < 2 > (Vs) <-1 > to 3.0 * 10 <-8 > m < 2 > (Vs) <-1 >. The polyelectrolyte compound can stably exist in a solution, flocculation groups obtained by flocculation of papermaking filler can resist relatively strong shearing force, the polyelectrolyte compound is particularly suitable for treating precipitated calcium carbonate (PCC) filler which is difficult to treat by a common method, and meanwhile, the binding force between the filler and fibers can be increased; therefore, the phenomena of hair falling and powder falling are relieved under the condition that high ash content is added, and the paper strength is ensured under the condition that a large amount of filler is added.

The application discloses a kind of photothermal dark degradable paper mulch and preparation method thereof, belong to mulch production field.The preparation method of the paper mulch includes: S1.lignite powder, alkaline substance is mixed with appropriate amount of water, heated stirring, solid-liquid separation, obtain solid-state lignite residue and lignite extraction liquid;S2.solid-state lignite residue is mixed with appropriate amount of wood pulp, water, retention and drainage aid, fully stir, obtain lignite residue filled dark wood pulp fiber;S3.with dark wood pulp fiber preparation dark base paper;S4.with lignite extraction liquid and polycondensation active compound preparation impregnation water-based resin;S5.dark base paper impregnation absorbs water-based resin, through drying, the crosslinking solidification of resin is completed in the process that paper is dried, obtain photothermal dark degradable paper mulch.Compared with prior art, the photothermal dark degradable paper mulch of the application has excellent photothermal heating performance, mechanical strength, weed control effect, soil improvement potential and full biodegradable characteristics.

The invention discloses a pulp mixing method for improving fiber interlacing force, which comprises the following steps: increasing fiber brooming rate (greater than or equal to 35%) through stepped pulping, optimizing parameters of a mixer and a headbox to enhance pulp uniformity, moving a cationic polyacrylamide retention aid forwards to an inlet of the mixer, prolonging reaction time to 12s, and compounding with polyvinyl alcohol and quaternary ammonium salt auxiliaries. And meanwhile, a linkage control relation (the pressure is + 0.01 MPa when the network speed is increased by 50m / min) between the network speed and the pulp outlet pressure is established, and three-level monitoring of safety, early warning and abnormity is realized in combination with more than one hundred thousand parameter databases. According to the scheme, fiber agglomeration and forming instability are effectively reduced, the paper breaking rate is remarkably reduced, and the raw paper strength and the production stability are improved.

The application discloses a fiber synergistic copolymer and a preparation method and application thereof, and belongs to the technical field of papermaking chemicals and high polymer materials. In view of the anion garbage interference caused by the deepening of white water closed circulation in the papermaking industry and the green compliance challenge brought by 'paper instead of plastic', the copolymer is designed in structure and function by using specific polycarboxylic acid and trace cationic monomer, and has excellent anti-interference ability and permeability. In the wet end pulp strengthening, the copolymer can surpass the strengthening effect of traditional high molecular weight additives by only needing a low amount of addition, and significantly improves the drainage and retention; in the surface sizing and paper pulp molding hot pressing process, the copolymer can greatly improve the rigidity and water resistance dimensional stability of products through a unique crosslinking mechanism. The scheme effectively solves the industry pain point of low strengthening efficiency in a complex environment, and the product does not contain organic fluorine, and completely meets the environmental protection and sustainable development needs of high-performance fiber-based materials.

The invention relates to a composition for providing barrier properties for a cellulosic fibre web, such as paper, board or the like. The coating composition comprises microfibrillated non-wood biomass, having a particle size D90<250 μm and particle size D50<100 μm, which microfibrillated non-wood biomass comprises at least 5 weight-% of a hemicellulose fraction and / or pectin, calculated from the dry weight of the microfibrillated non-wood biomass; an auxiliary agent comprising at least one cellulose derivative, and / or a synthetic binding agent, such as polyvinyl alcohol or polystyrene acrylate copolymer.

The invention belongs to the technical field of papermaking, and particularly relates to silicon dioxide modified oil-absorbing paper and a preparation method thereof. The preparation method of the silicon dioxide modified oil-absorbing paper comprises the following steps: adding water into slurry for soaking, defibering and dispersing to prepare a suspension liquid with the mass concentration of 10-20%, adding the suspension liquid into a mixed solution composed of ammonia water, an alcohol solvent and distilled water, stirring and dispersing to obtain a mixed suspension liquid, adding tetraethoxysilane into the mixed suspension liquid, stirring and dispersing to obtain the silicon dioxide modified oil-absorbing paper. Continuously stirring and reacting, standing, pouring out supernate, washing with distilled water to be neutral, drying to obtain silicon dioxide modified fibers, adding water into the silicon dioxide modified fibers for defibering and dispersing, adding an auxiliary agent for stirring, performing wet-process papermaking and forming, and drying to obtain the silicon dioxide modified oil-absorbing paper. The preparation method of the silicon dioxide modified oil-absorbing paper provided by the invention is simple in process, non-toxic and environment-friendly, and the prepared modified oil-absorbing paper remarkably improves the oil-absorbing performance and maintains the degradability.

The application belongs to the technical field of paper product manufacturing, and discloses a food-grade antibacterial and mildew-proof paper pulp, a paper product and a preparation method of the paper product. The paper product is prepared by papermaking and drying of the paper pulp. The food-grade antibacterial and mildew-proof paper pulp comprises the following components in parts by weight: 100 parts of pulp for household paper, 0.1-0.3 parts of sodium alginate, 0.5-1 parts of a retention aid, 4-10 parts of a slow-release antibacterial and mildew-proof agent, and 0.8-1.5 parts of a wet strength agent. The slow-release antibacterial and mildew-proof agent is prepared by coating MOF-ELA-THY with chitosan. The MOF in the MOF-ELA-THY is prepared from zinc ions and two ligands of citric acid and malic acid. The chitosan is first subjected to antibacterial and degradation treatment, and then gradually exposes the MOF-ELA-THY. The MOF is hydrolyzed to release zinc ions and ELA and THY, thereby endowing the paper towel with long-acting antibacterial performance. In addition, the THY emits a fragrance, thereby judging the persistence of the antibacterial performance of the paper towel.