24results about "Rosin addition" patented technology

The present disclosure provides a coated paperboard comprising a paperboard substrate and a coating layer wherein: the coating layer comprises a pigment mixture and a binder in a dry weight ratio within the range of from 100:14 to 100:25; the pigment mixture comprises a calcium carbonate pigment and a clay pigment in a dry weight ratio within the range of from 98:2 to 92:8; and the calcium carbonate pigment has a particle size distribution (wt. %<2 μm) within the range of from 75 to 95.

The invention discloses a preparation method of all-bamboo fiber basic color paper cup body paper and a product thereof, and the preparation method comprises the following steps: mechanically grinding bamboo chemical pulp fibers and bamboo chemical thermo-mechanical pulp fibers as raw materials, carrying out biological treatment on the bamboo chemical thermo-mechanical pulp fibers by using laccase / mediator, and preparing the paper cup body paper by adopting a three-layer composite papermaking process. The paper cup body paper is composed of a surface layer (bamboo chemical pulp), a core layer (bamboo chemical thermo-mechanical pulp treated by laccase / ABTS) and a bottom layer (bamboo chemical pulp), and aluminum sulfate, rosin size and CPAM are added in the papermaking process. The technical problems that the production cost is high due to the fact that traditional unbleached paper cup body paper depends on wood pulp, and bamboo pulp fibers are difficult to give consideration to high bulkness and high strength are solved, the raw material cost is low, the production process is environmentally friendly, the product has excellent physical strength, bulkness and water resistance, wood resource consumption can be reduced, and sustainable development of the papermaking industry is promoted.

The present invention relates to compositions and methods for forming substantially bio-based barrier coatings on paper and cardboard substrates. The bio-based barrier coating of the present invention comprises a biowax emulsion containing one or more biowaxes, such as castor oil wax, formed by the hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing the biowax emulsion in a polyacrylate carrier dispersion and can be applied as a coating on, for example, paper or cardboard, such as that made of recycled fibers, using conventional industrial methods at ambient temperature.

The invention discloses a self-emulsifying bio-based polyester stabilized multi-class bio-based polymer water-based emulsion as well as a preparation method and application thereof, and belongs to the technical field of bio-based high polymer materials and water-based resin. According to the preparation method disclosed by the invention, a dual-interface synergistic stabilization mechanism is constructed by adopting the self-emulsifying bio-based polyester containing furandicarboxylic acid and the rosin-based component, so that efficient emulsification and interface compatibility of various hydrophobic bio-based film-forming polymers such as polyhydroxyalkanoate and polylactic acid are realized. The emulsion prepared by the invention has excellent storage stability and machining adaptability, maintains extremely high bio-based content and extremely low volatile organic compound residue while remarkably improving the water resistance, oil resistance and gas barrier property of a paper-based coating, and completely meets the safety standard of food contact-grade materials. According to the preparation process, the microstructure of dispersed phase particles is accurately regulated and controlled through phase inversion and high-pressure homogenization, and an ideal green coating solution is provided for high-performance environment-friendly paper-based packaging.

There is provided a multi-layered paperboard comprising a print layer and a back layer, wherein the print layer as well as the back layer comprises AKD or ASA, rosin size and alum, the dry weight ratio between the AKD or ASA and the rosin size in the print layer is at least 0.8:1 and the amount of alum is below 2.0 kg / tonne based on dry weight of fibres in the print layer.

The application belongs to the technical field of papermaking, and particularly relates to a domestic fiber anti-fake coated cigarette card paper and a production process thereof. The domestic fiber anti-fake coated cigarette card paper comprises a base paper layer, a coating layer and a back adhesive layer. The base paper comprises a surface layer, a core layer and a bottom layer. The anti-fake domestic fiber accounts for 4-6% of the surface layer, 1-3% of the core layer and 6-9% of the bottom layer. The coating layer is coated on the surface layer and is divided into three layers, i.e., a pre-coating layer, a middle coating layer and a surface coating layer. The back adhesive layer is coated on the bottom layer. The application adds the anti-fake domestic fiber with different proportions in three layers to form a unique texture on the paper plane. The three-dimensional fiber texture with different levels and different brightness can be observed through light. The anti-fake fiber on the surface layer of the paper surface is greater than or equal to 50 per 55*22 mm, and the anti-fake fiber on the bottom layer is greater than or equal to 140 per 55*22 mm. The prepared coated cigarette card paper can be effectively distinguished from ordinary white card paper and has the anti-fake function.

The invention relates to anion modified low-foam dispersed rosin size as well as a raw material composition, a preparation method and application thereof, and belongs to the technical field of papermaking sizing agents. The low-temperature-resistant rosin resin comprises the following raw materials in parts by weight: 50-100 parts of rosin, 5-10 parts of maleic anhydride, 1.5-8 parts of sodium sulfite, 8-15 parts of a compound emulsifier, 0.1-0.5 part of a stabilizer, 50-100 parts of water and 0.1-0.5 part of a defoaming agent, the compound emulsifier comprises sodium dodecyl benzene sulfonate and fatty alcohol-polyoxyethylene ether sodium sulfate. According to the method, the anionic rosin size which is low in foam, short in cold water dispersion time and stable in long-term storage can be prepared by using a small amount of specific compound emulsifier.

Paper cup (1) without plastic coating comprising of cup wall (2) forming hollow truncated conical shape (7), bottom (6) sealing hollow truncated conical shape (7) at its smaller diameter end (4), curl profile (5) formed at larger diameter end (3) of cup wall (2) and knurl profile (22) formed at smaller diameter end (4) of cup wall (2) and method of its manufacturing is disclosed. Cup wall (2) and bottom (6) is made up of paperboard composed from 94-96% of cellulose pulp, 1-2% of starch and 2-3% of rosin without any synthetic coatings or polymers. Welding adhesive used is polyolefin particles of 5-8 µm size uniformly disperse in water. By minimizing use of plastics and focusing on sustainable materials, present paper cup (1) and manufacturing process ensures compliance with regulatory requirements and supports production of high-quality, eco-friendly paper cups.

The invention relates to the technical field of paper manufacturing, and provides moisture-proof flame-retardant paper and cartons, the paper is prepared by the following method: S1, raw paper is soaked in a flame-retardant solution, and a flame retardant of the flame-retardant solution comprises the following raw materials in parts by weight: 5-7 parts of ammonium polyphosphate and 4 parts of ammonium dihydrogen phosphate; s2, drying the paper impregnated in the step S1 until the water content is 6.0-8.5%; s3, damp-proof sizing liquid is applied to the surface of the paper dried in the step S2, and the sizing amount is 8-12%; and S4, drying the paper impregnated in the step S3 for 5-10 minutes at the temperature of 85-95 DEG C in the first stage, and drying the paper for 10-20 minutes at the temperature of 105-120 DEG C in the second stage. The defects in the prior art are overcome, precipitation of ammonium polyphosphate in the paper can be effectively reduced, the reliability of overall flame retardance inside and outside the paper is ensured, and reliable combination of subsequent damp-proof sizing liquid and the surface of the paper is ensured.

There is provided a multi-layered paperboard comprising a print layer and a back layer, wherein the print layer as well as the back layer comprises AKD or ASA and alum, the dry weight ratio between the alum and AKD or ASA in the print layer is below 2:1 and the amount of alum is below 2.0 kg / tonne based on dry weight of fibres in the print layer.

The invention belongs to the technical field of papermaking, and particularly relates to high-bulk cup base paper and a production process thereof, and the production process comprises the following steps: S1, raw material preparation: performing pulp preparation by taking coniferous wood fibers, broadleaf wood fibers, chemical mechanical wood pulp fibers, modified herbaceous plant fibers and polyester long fibers as fiber raw materials; s2, pulping, wherein the pulping degree is controlled between 25 degrees SR and 32 degrees SR; s3, slurry preparation: adding a filler into the slurry, and sizing the slurry prepared in the step S2 by using a mixed solution of a rosin emulsion, an aluminum sulfate solution, an assistant A and an assistant B as a composite slurry internal sizing agent and adopting an internal sizing process; s4, papermaking: feeding the fiber raw material into a papermaking machine for papermaking to form a wet paper web; s5, post-treatment, wherein the wet paper web is sequentially subjected to squeezing, drying and calendaring treatment; and S6, surface sizing: performing surface sizing treatment on the paper. The high-bulk cup base paper disclosed by the invention has the advantages of high bulk, good strength, water resistance and the like.

The invention relates to drinking U-straws and more particularly to a paper for manufacturing drinking U-straws, which is environmental friendly, bio-degradable and is able to be formed in the shape of a bent straw with an accordion-like structure at the bend. The paper has high water resistance as well as high strength and elongation properties compatible with the intended use. In particular, the paper for forming a U-straw includes: •between 10 and 50 dry wt % of first fibers having a length of between 1.4 mm and 2.5 mm; •between 40 and 80 dry wt % of second fibers having a length of between 0.3 mm and 0.8 mm; and •between 1 and 6 dry wt % of a sizing agent.

The invention discloses a papermaking method for improving the sizing efficiency of rosin size of a food card, and relates to the technical field of papermaking. Adjusting the refluxing proportion of the ground pulp to 10%-15%; setting the quantity of the surface layer and the bottom layer to be 23-30 / 27-36, and adding 70% cationic starch with the concentration of 1.0-1.5% into the prepared slurry; the dosage ratio of aluminum sulfate to rosin size is dynamically adjusted, the surface layer ratio is (0.9-1.1): 1, and the core layer ratio is (1.1-1.3): 1; performing dilution; forming on a net; performing squeezing; a three-section temperature curve is adopted for control, the temperature ranges from 100 DEG C to 105 DEG C to 110 DEG C to 115 DEG C to 105 DEG C to 115 DEG C in sequence, and the corresponding drying rate ranges from 30% to 35% to 70% to 75% to 100%; sizing on the surface; performing post-drying; carrying out hard calendaring; coating is conducted; carrying out soft calendering; and performing subsequent treatment. The problems that in existing food card production, rosin size is low in sizing efficiency, large in using amount and unstable in product performance, and consequently paper machine operation efficiency is reduced, and environmental protection pressure is increased are solved.

The application discloses a cationic modified rosin anion rosin size with charge reversal stability and a preparation method and application thereof, and belongs to the technical field of anion rosin size. The rosin size is composed of the following raw materials in parts by mass: rosin 100-200 parts; epichlorohydrin 30-90 parts; trimethylamine 3-7 parts; tetrabutylammonium bromide 0.5-1 part; anion starch emulsifier 5-8 parts, sodium dioctyl sulfosuccinate 5-8 parts; defoaming agent 0.5-2 parts; and water 100-240 parts; wherein the anion starch emulsifier is prepared by reacting cassava starch and sodium chloroacetate under alkaline conditions. The modified rosin liquid and the anion emulsifier are emulsified by using a high-temperature normal-pressure phase inversion method to prepare the cationic modified rosin anion rosin size based on the charge reversal stability, and the cationic modified rosin anion rosin size has the characteristics of no chloropropanol, no organic chlorine and good stability, and can realize acid to neutral sizing.

There is provided a multi-layered paperboard comprising a print layer and a back layer, wherein the print layer as well as the back layer comprises AKD or ASA and alum, the dry weight ratio between the alum and AKD or ASA in the print layer is below 2:1 and the amount of alum is below 2.0 kg / tonne based on dry weight of fibres in the print layer.

The present invention relates to compositions and methods for forming substantially bio-based barrier coatings on paper and board substrates. The inventive bio-based barrier coatings comprise a biowax emulsion comprising one or more biowaxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a biowax emulsion into a polyacrylate carrier dispersion, and may be applied as a coating e.g., on paper or board, e.g., those comprised of recycled fibers, using conventional industrial methods at ambient temperatures.

The invention discloses chloride-free cation dispersed rosin size as well as a preparation method and application thereof, and belongs to the technical field of rosin size preparation, the rosin size is prepared from the following components: 50-200 parts of modified rosin, 10-20 parts of a compound emulsifier, 0.1-0.5 part of a defoaming agent and 100-200 parts of water, wherein the compound emulsifier consists of hyperbranched dendrimer and rigid gemini quaternary ammonium salt in a mass ratio of (1: 1)-(1: 2); the zeta potential of the rosin size is greater than or equal to + 50 mV, the average particle size is less than or equal to 0.3 mu m, and the content of chloropropanol is not detected. The cationic rosin size which is milky white in appearance, good in stability, good in dispersity in cold water, good in storage stability, low in viscosity, low in foam and free of chloropropanol content is obtained by using hyperbranched dendrimer and rigid gemini quaternary ammonium salt as a compound emulsifier and adopting continuous high-temperature pre-emulsification and high-pressure homogeneous emulsification processes.

The invention provides a stone roller anti-sticking control method for an acid papermaking system of a high-speed paper machine. The method comprises the following steps: adding cationic starch and an amphoteric dry strength agent into a paper pulp system to reduce anionic garbage in the paper pulp system; carrying out internal sizing by using a foam-inhibiting fortified rosin sizing agent; and spraying the alcohol-free dissolving type stripping agent on the surface of the stone roller through a spraying device. The stone roller anti-sticking control method for the acid papermaking system of the high-speed paper machine, provided by the embodiment of the invention, is high in comprehensiveness and remarkable in effect: through triple synergistic effects of'in-pulp (anion garbage control)-process (foam-inhibiting rosin sizing)-terminal (alcohol-free stripping agent) ', generation and deposition of viscous substances are reduced from the source, and the quality of the stone roller is improved. The problem of material sticking of the stone roller under high-speed acidic papermaking is thoroughly solved, and the operation efficiency is improved; the control method has the characteristics of being adaptive to a closed system, capable of improving paper quality and high in cost effectiveness.

The invention provides a preparation method of anti-sticking oil-resistant baking paper, which comprises the following steps: mixing wood pulp, a retention and drainage aid, a reinforcing agent and an internal sizing agent, performing papermaking molding treatment, sequentially performing squeezing dehydration and primary drying treatment, and performing double-sided sizing treatment on a wet paper sheet by adopting a surface sizing agent, and sequentially carrying out secondary drying, calendaring and curling treatment on the paper sheet subjected to double-sided sizing treatment. By adopting the method, the anti-sticking and oil-resistant performance of the baking paper can be improved, only one-time in-machine coating is needed, the coating process can be simplified, the production efficiency is improved, and meanwhile, the production cost is reduced.

The invention discloses an environment-friendly paper bag and a production process and application thereof, and belongs to the technical field of paper bag preparation, the environment-friendly paper bag comprises base paper, and a wet strength agent accounting for 3%-6% of the total mass of oven dry pulp, aluminum sulfate accounting for 7%-8% of the total mass of the oven dry pulp and cationic rosin size accounting for 2.5%-3% of the total mass of the oven dry pulp are added into the base paper; the wet strength agent is obtained by heating carboxyl-containing modified chitosan and formylated starch according to a mass ratio of 1: 1 under an acidic condition; the aldehyde content of the aldehyde starch is 43%-45%; the carboxyl-containing modified chitosan is one of carboxymethylation modified chitosan and anhydride acylation modified chitosan. The prepared environment-friendly paper bag is good in air permeability, has good wet strength, can resist rain wash, further has certain antibacterial property, prevents diseases and insect pests, reduces pesticide residues and can be used as a fruit cultivation paper bag.

The present disclosure relates to a machine-glazed (MG) paper having a Cobb value of 23 g / m2 / 60s or below as measured according to the standard method ISO 535:2023, wherein the paper comprises AKD and rosin size and the ratio of AKD to rosin size is within of from 1:4 to 3:4. The present disclosure furthermore relates to a method of producing the MG paper.

The invention relates to a preparation method and equipment of special explosion-proof body paper for paper tubes, and relates to the technical field of body paper manufacturing, the special explosion-proof body paper comprises a raw material processing assembly, a paper forming processing assembly, a paper drying processing assembly and a paper post-processing assembly, the paper drying processing assembly comprises a water dipping device used for attaching water to paper, and the water dipping device comprises a machine body; a containing box used for containing water is arranged on the machine body, a water adding assembly used for filling the containing box with water is further arranged on the machine body, a water dipping roller is rotationally connected to the machine body, the outer side wall of the water dipping roller makes contact with the water in the containing box, a pressing roller is rotationally connected to the machine body, and the pressing roller is higher than the water dipping roller. Paper is located between the pressing roller and the water dipping roller. The uniformity of water attached to paper can be improved.

This invention relates to the field of electrolytic capacitor paper preparation technology, and more particularly to a carbon-free solid aluminum electrolytic capacitor paper and its preparation method. This method significantly improves the performance of the electrolytic capacitor paper by adding bamboo fiber pulp to hemp pulp and subjecting it to ultrasonic dispersion treatment, combined with chemical cross-linking treatment. This technology not only improves the dispersion and uniformity of the fibers, but also enhances the bonding force between fibers, thereby increasing the paper's adsorption capacity, mechanical strength, and electrical properties, reducing the occurrence of side reactions, and thus improving the stability and service life of the capacitor. Simultaneously, the carbon-free process simplifies the production process, saves energy, and reduces environmental impact. These technical effects give the low-density carbon-free solid electrolytic capacitor paper of this invention significant advantages in performance, production efficiency, and environmental friendliness.

The present disclosure relates to a machine-glazed (MG) paper having a Cobb value of 23 g / m2 / 60s or below as measured according to the standard method ISO 535:2023, wherein the paper comprises AKD and rosin size and the ratio of AKD to rosin size is within of from 1:4 to 3:4. The present disclosure furthermore relates to a method of producing the MG paper.