66results about "Rosin addition" patented technology

The invention discloses paper pulp, a paper pulp board, a preparation method and application. The paper pulp provided by the invention comprises the following components in parts by weight: 15-50 parts of wood pulp, 10-30 parts of recycled paper pulp, 10-40 parts of barley straw fibers, 2.5-40 parts of vinasse fibers, 3-8 parts of a negative oxygen ion exciting agent, 0.5-8 parts of an adhesive, 0.5-4 parts of a sizing agent and 0-1 part of an additive. According to the provided paper pulp, waste of the wine making industry chain is fully utilized, barley straw fibers, vinasse fibers, wood pulp, recycled paper pulp, the negative oxygen ion exciting agent and the like are combined, the obtained paper pulp fiber is high in strength, and a carton finished product is high in compressive strength and free of peculiar smell. The paper pulp for preparing cartons with excellent performance is provided while the recycling of wastes of a wine brewing industry chain is realized.

The invention discloses a preparation technology of collection paper literature deacidification test paper, and belongs to the technical field of papermaking engineering. The method comprises the following steps: firstly, determining physicochemical indexes of the deacidification test paper according to ontology characteristics of precious ancient books and recent modern paper literatures, then taking saponified rosin size as an internal sizing agent, taking talcum powder as a filler, taking cationic polyacrylamide (CPAM) as a retention aid, and finally, carrying out papermaking and drying to obtain the deacidification test paper. The performance of the product prepared by the process is basically consistent with that of recent modern literature paper, the product has the capability of replacing a paper literature body to carry out lossy testing, and a more reliable, more comprehensive and more economical basis can be provided for constructing a deacidification effect evaluation system.

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.

There is provided a method of producing a multi-layered liquid packaging board (LPB) comprising a print layer, a back layer and a middle layer, said method comprising the steps of: - providing a maple chemithermomechanical pulp (CTMP) and forming a middle layer furnish comprising the maple CTMP, broke pulp and hydrophobic size; - forming a middle layer web from the middle layer furnish in a forming section of a full-scale paperboard machine; - forming a print layer web from a print layer furnish in the forming section, which print layer furnish comprises hydrophobic size; - forming a back layer web from a back layer furnish in the forming section, which back layer furnish comprises hydrophobic size; and - form a multi-layered LPB from the print layer web, middle layer web and back layer web so that the middle layer is arranged between the print layer and the back layer.

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 present invention relates to a flute or liner for corrugated board comprising neutral sulfite semi-chemical (NSSC) pulp, the NSSC pulp having an ash content of less than 1.8 wt.% as determined according to ISO standard 1762: 2019. The present invention further relates to a corrugated board comprising the flute and / or liner.

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.

The invention discloses novel tipping base paper which comprises 60-70% of wood pulp, 20-30% of waste paper pulp, 3-5% of quaternary ammonium starch ether, 0.5-1% of polyacrylamide, 0.5-1% of carboxymethyl cellulose, 5-10% of calcium carbonate, 2-5% of talcum powder, 1-2% of rosin size, 0.5-1% of alkyl ketene dimer, 0.5-1% of wet strength agent and a proper amount of dye and preservative. By using the recycled paper pulp, the dependence on raw wood is reduced, and the environmental influence is reduced; and by using the biodegradable additive, the harm to the environment is reduced. In addition, the anti-counterfeiting appearance is formed by using the coating which can be impressed to generate a crack structure, so that the quality and strength of the body paper are 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.

To provide a novel method for manufacturing a pulp product having liquid repellency.SOLUTION: There is provided a method for manufacturing a pulp product, comprising: a first heating step for heating a pulp composition containing pulp and a liquid-repellent compound to a first heating temperature to obtain a precursor product in which the liquid-repellent compound is adhered to the pulp; a first cooling step for cooling the precursor product to a first cooling temperature to obtain a cooled precursor product; and a second heating step for heating the cooled precursor product to a second heating temperature to obtain a pulp product.SELECTED DRAWING: None

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.

Provide is a novel method for producing a pulp product to which liquid repellency is imparted by a method for producing a pulp product, comprising: a first heating of heating a pulp composition comprising pulp and a liquid repellent compound to a first heating temperature, thereby preparing a precursor product in which the liquid repellent compound is adhered to the pulp; a first cooling of cooling the precursor product to a first cooling temperature, thereby preparing a cooled precursor product; and a second heating of heating the cooled precursor product to a second heating temperature, thereby preparing a pulp product.

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 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 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.

The present invention discloses the use of a highly active reactive rosin organosilicon resin, and its structural formula is: #imgabs0# wherein, R1 is rosin or its derivative; R2 is one of -O-, #imgabs1# or NH-(CH2)2-NH-(CH2)3-; R3 is at least one or a combination of -CH3, -OCH3, -OCH2CH3, -CH=CH2 or -OH. The present invention prepares a highly active reactive rosin organosilicon resin by reacting rosin or its derivative with a silane coupling agent, which can be added as a sizing agent to a pulp fiber suspension. A covalent bond can be formed between the alkoxy group in the structure of the rosin organosilicon resin and the hydroxyl group of cellulose, endowing the paper-based material with firm, durable and stable water resistance, so that the sized paper-based material shows great potential to replace plastic 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 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 present invention relates to a polymer dispersion, which comprises polymer particles dispersed in an aqueous continuous phase. The polymer particles are obtainable by a radical polymerisation of one or more vinyl monomers comprising alkyl (meth) acrylates. A rosin component is dissolved into at least one of the vinyl monomers before the radical polymerisation of the vinyl monomers, and the radical polymerisation is conducted in the presence of the rosin component. The invention relates also to the use of the polymer dispersion for surface sizing of a cellulosic fibre web and to a method for producing a polymer dispersion.