45results 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 present disclosure relates to a machine glazed paper comprising softwood fibers, the machine glazed paper comprising starch to an amount within the range of from 0.1 wt. % by weight to 2 wt. % of the dry weight of the machine glazed paper. the amount of softwood fibers of the total amount of fibers being 63 wt. % or more, and the machine glazed paper having a Cobb value within the range of from 20 gsm to 50 gsm. as measured according to the standard method ISO 535:2014. The present disclosure furthermore relates to a method of producing the machine glazed paper.

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.

This invention discloses a method for preparing zero-VOCs degradable seedling paper, comprising the following steps: S1, raw material selection: the fiber raw material includes 75-85% cattail and 15-25% reed by mass fraction; S2, the fiber raw material described in S1 is sequentially processed through the following steps: cattail + reed → vertical cooking → closed screening → pulp washing → oxygen delignification → pulp concentration → unbleached chemical straw pulp → storage tower → extruder → high-consistency mill → anti-fouling tank → conical refiner → pulp mixing tank → pulp forming tank → sand removal → screening → wire forming → pressing → pre-drying → surface sizing → post-drying → calendering, to obtain seedling paper that meets the requirements for ecological agricultural paper. The seedling paper obtained by this invention has good air permeability and high dry and wet strength, weather resistance to wind and rain erosion and trampling, can achieve natural microbial degradation in soil, and all raw materials are zero-VOCs degradable and sustainable, making it green, environmentally friendly and harmless to the soil.

The invention relates to the technical field of pulping and papermaking, in particular to a rosin size preparation process which comprises the following steps: concentrating and screening paper pulp, feeding the pulp into a slushing pump, and injecting 1235T rosin size at an outlet of the slushing pump according to a proportion of 18kg / t; after the slurry enters the mixing pool, aluminum sulfate is added in three times, the addition amount of the aluminum sulfate on the surface layer / the bottom layer is equal to the ratio of the 1235T rosin size dosage to 0.8, and the pH value of the slurry is controlled to be stabilized at 5.0 + / -0.5; the fixed addition amount of aluminum sulfate in a core layer is 45 + / -5kg / t, and the pH value of the slurry is controlled to be stabilized at 6.1 + / -0.3; 15kg / t of dry strength agent, 5kg / t of talcum powder and 5kg / t of silica sol are simultaneously added into the core layer; the mixed slurry enters a buffer pool, the dispersion particle size is detected, and when the particle size ranges from 25 micrometers to 35 micrometers, the slurry is conveyed to a net part; and carrying out papermaking, and collecting production wastewater and solid waste. The three core problems of large dosage, poor water resistance and high environmental protection load in the traditional 1278 type rosin size process can be solved.

The present invention relates to a polymer dispersion and its use. The dispersion comprises polymer in particle form dispersed in an aqueous liquid phase. The polymer particles are obtained by a radical polymerisation of monomers in a presence of a dissolved rosin component, in an aqueous polymerisation medium comprising a polymeric stabilizer. The monomers comprise a first monomer (i) selected from alkyl (meth)acrylates and a charge-carrying second monomer (ii) having a cationic charge, when measured at pH 3, selected from ethylenically unsaturated tertiary amines.

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 relates to the field of petroleum resin preparation, in particular to a preparation method of modified C9 petroleum resin and application of the modified C9 petroleum resin in a sizing agent. According to the method, quaternary ammonium salt and other cationic functional groups are introduced into the modified C9 petroleum resin, and the modified C9 petroleum resin is prepared through the steps of emulsification pre-dispersion, introduction of cationic monomer copolymerization, free radical polymerization reaction and the like. The goals of high resin self-emulsifying capacity, excellent cation adsorbability and wide application range are achieved; when the modified C9 petroleum resin is applied to a sizing agent, the sizing agent emulsion is endowed with good storage stability and slurry compatibility, the modified C9 petroleum resin can be widely applied to surface sizing and internal sizing of cultural paper, packaging paper and other products, and the influence of sizing on the environment is reduced while the paper performance is improved.

Disclosed in the present invention are a paper substrate and a preparation method therefor, and a paper-based flexible package. The preparation method for the paper substrate comprises: carrying out pulping, refining and blending on softwood pulp and hardwood pulp to form pulp with a concentration of 0.1-0.6%; adding epoxy resin modified polyacrylate at 5-15 kg / per ton of bone-dry pulp, a rosin size at 0.2-2 kg / per ton of bone-dry pulp, and a wet strength agent at 30-80 kg / per ton of bone-dry pulp; and carrying out papermaking, drying, creping and winding. The paper-based flexible package comprises a package body; the package body is enclosed by a paper substrate to form a hollow cavity, comprising two end sealing portions and front and rear sealing portions; the two end sealing portions and the front and rear sealing portions are connected by means of a plurality of bonding layers; and the bonding layers are formed by the interlocking of plant fibers and polyacrylate. The paper substrate obtained in the present invention has the required heat-sealing properties and strength even at low grammage, ensuring the flexibility of the substrate and facilitating automated continuous production of devices.

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.

A method for preparation of a starch-promoted alkyl ketene dimer (AKD) sizing emulsion is provided. The inventive method comprises adding a sizing promoter comprising high-charge cationic starch and polyaluminum chloride (PAC) to a stabilized AKD emulsion and further wherein addition of said sizing promoter comprising high-charge cationic starch and PAC is effected at ambient temperature, after emulsification, stabilization, and homogenization of said stabilized AKD emulsion; and prior to addition of the starch-promoted AKD sizing emulsion to papermaking furnish, pulp, or fiber stock.

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.

Disclosed in the present invention are a paper substrate and a preparation method therefor, and a paper-based flexible package. The preparation method for the paper substrate comprises: carrying out pulping, refining and blending on softwood pulp and hardwood pulp to form pulp with a concentration of 0.1-0.6%; adding epoxy resin modified polyacrylate at 5-15 kg / per ton of bone-dry pulp, a rosin size at 0.2-2 kg / per ton of bone-dry pulp, and a wet strength agent at 30-80 kg / per ton of bone-dry pulp; and carrying out papermaking, drying, creping and winding. The paper-based flexible package comprises a package body; the package body is enclosed by a paper substrate to form a hollow cavity, comprising two end sealing portions and front and rear sealing portions; the two end sealing portions and the front and rear sealing portions are connected by means of a plurality of bonding layers; and the bonding layers are formed by the interlocking of plant fibers and polyacrylate. The paper substrate obtained in the present invention has the required heat-sealing properties and strength even at low grammage, ensuring the flexibility of the substrate and facilitating automated continuous production of devices.

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.

The application discloses a preparation method of waterproof and oil-proof base paper for coated paper, and belongs to the technical field of coated paper. The base paper raw material comprises pulp and pulp preparation additives. The pulp preparation additives comprise retention aids, filter aids, in-pulp sizing agents, in-pulp reinforcing agents, system process additives and fluorescence eliminating agents. The in-pulp sizing agents comprise rosin size and aluminum sulfate. The rosin size is anionic. The aluminum sulfate is added to a batching pool, and the rosin size is added to a flow feeding position. The application can quickly and stably control the paper fluorescence value to be less than or equal to 0.1%, and can meet the safety of food paper containers. The paper edge penetration stability is stably controlled to be less than or equal to 3 mm (10 min in 95 DEG C hot water), and the water resistance and stability of subsequent processing into a drinking cup, a face bowl and the like are improved.

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.

Methods for manufacturing sized paper products are provided. An exemplary method includes producing a foam of water, air, a foaming agent, and a sizing agent. Further, the exemplary method includes applying the foam to a web and processing the web to form the product.

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 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 relates to a preparation method of a gas diffusion layer material, and belongs to the technical field of electrochemistry. The preparation method comprises the following steps: uniformly mixing ablatable template fibers and common carbon fibers according to a certain proportion, making the mixed fibers into carbon paper raw paper by using a fiber web forming technology, and then carrying out processes of modified resin impregnation, hot-pressing curing, carbonization graphitization and the like to obtain a substrate layer of a gas diffusion layer material. Different from a traditional gas diffusion layer material preparation process, the substrate layer is not subjected to hydrophobic treatment, and the surface of the substrate layer is directly coated with the hydrophobic microporous layer.

There is provided a method for producing a dispersion comprising a polysaccharide, such as cellulose ester, and rosin. Additionally is provided a dispersion comprising a polysaccharide, such as cellulose ester and rosin.