91results about "Rosin addition" patented technology

The invention relates to the technical field of artificial board processing, in particular to an adhesive for high-toughness impregnated bond paper and a preparation method thereof, and the adhesive comprises the following components: 50-70 parts of melamine, 20-30 parts of formaldehyde solution, 9-29 parts of modified foamed honeycomb type polyurethane flexible body, 1-3 parts of polyvinyl alcohol, 1-5 parts of rosin, 1-5 parts of solid filler, 2-8 parts of emulsifier, 0.05-0.1 part of pH regulator and 60-90 parts of water. Through a strategy of combining internal toughening modification (a flexible foaming method) and external toughening modification (flexible polymer blending and filler modification), a melamino-formaldehyde system of the prepared adhesive has very excellent toughness, and the problem that impregnated bond paper is easy to crack due to size change caused by inadaptation to the moisture content of a base material is effectively solved.

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 digital heat transfer paper with low rejection rate and a preparation method thereof. The digital heat transfer paper is prepared by the following steps: firstly, preparing a surface coating glue solution, then carrying out pulping, pulping and proportioning on the pulp, and carrying out a plurality of processes of forming on a net, carrying out surface sizing and coating, thereby finally obtaining the digital heat transfer paper. The sizing agent is modified by using the grafting agent to obtain the modified sizing agent, and then the modified sizing agent is applied to the digital heat transfer paper, so that compared with the prior art, the digital heat transfer paper prepared by the invention has the advantages of good glossiness, relatively good hydrophobicity and the like.

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.

Provided is a transparentizing agent which is formed from a bio-derived raw material and with which a transparent paper having excellent transparency and stability over time can be obtained. The present invention provides a transparentizing agent comprising a polyester resin component, which is a reaction product of raw material components including (A) rosins, (B) a polycarboxylic acid, (C) a polyol, and (D) an aliphatic monocarboxylic acid, wherein the acid value of the polyester resin component is 100 mgKOH / g or less, the weight average molecular weight of the polyester resin component is 1,000,000 or less, and the refractive index of the polyester resin component is 1.40-1.60.

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 anionic dispersed rosin size, a raw material composition thereof, a preparation method and application thereof. The anionic dispersed rosin size comprises the following raw materials in parts by weight: 100-200 parts of rosin, 5-20 parts of a modifier, 8-30 parts of a low-molecular emulsifier, 40-80 parts of a high-molecular emulsifier and 2-8 parts of a dispersant. The anionic dispersed rosin size is prepared by emulsifying a modified rosin liquid, a low-molecular emulsifier and a high-molecular emulsifier by using a high-temperature normal-pressure phase inversion method.

The invention discloses an efficient production method of digital heat transfer paper, and belongs to the technical field of papermaking. The method comprises the following steps: mixing modified starch and water, and heating to form a sizing solution; a styrene-acrylic surface sizing agent and rosin size are mixed, and light calcium carbonate and sodium carboxymethyl cellulose are mixed, so that a surface sizing solution and a coating glue solution are prepared respectively; pulping, diluting and pulping the pulp to form mixed pulp with proper beating degree; the method comprises the following steps: adding an internal sizing solution and a PPE wet strength agent into a mixed slurry, screening and purifying the slurry through a slushing pump, a sand remover and a pressurized screen, then forming on a net, simultaneously adding auxiliary agents such as polyethyleneimine, calcium silicate and silica sol, and finally obtaining the digital heat transfer printing paper with excellent tensile strength and folding strength after squeezing dehydration, surface sizing and drying of a paper sheet. Compared with the prior art, the method disclosed by the invention not only improves the production efficiency, but also ensures the printing quality and the mechanical property of the digital heat transfer paper, and meets the requirements of the market on high-performance transfer 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 provides a rosin supplement / cationic rosin sizing agent, which is composed of rosin, a rosin supplement, a cationic polymer emulsifier and a dispersant, the use amount of the rosin supplement is 5-20wt% of the total use amount of the rosin and the rosin supplement, and the rosin supplement is formed by graft copolymerization of polyethylene wax, maleic anhydride and styrene. According to the rosin supplement / cationic rosin sizing agent, maleic anhydride and styrene are added into polyethylene wax to serve as grafting monomers, grafting modification is initiated by organic peroxide to obtain grafted modified polyethylene wax, then the grafted modified polyethylene wax and rosin are mixed and melted according to a certain proportion, a cationic polymer emulsifier and a dispersing agent are added, and water-in-oil emulsion is obtained; and finally adding hot water for phase inversion. The modified polyethylene wax is used as a rosin supplement to partially replace rosin to prepare the cationic rosin sizing agent, so that the stability and the sizing effect of the product can be greatly improved, the dosage of the rosin can be greatly reduced, and the production cost is reduced.

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 provides a single-color fruit bag paper production device and process, and relates to the technical field of papermaking equipment. According to the device, firstly, after the proportioned pulp is mixed by the device, the pulp is subjected to impurity removal to prepare a paper material, and at the moment, spraying is performed through the spraying assembly, so that the smoothness of the paper is improved; the outer cover assembly and the shielding assembly at the spraying assembly can shield mist and prevent the mist from diffusing, water drops formed on the inner wall of the outer cover assembly can slide to the collecting assembly to be collected, the paper material is in direct contact with the waxing assembly after being dried, and the waxing assembly evenly disperses wax liquid on the surface of the paper material. The problems that four parts of spraying are atomized and diffused, water drops are formed and drop on paper to cause influence when shielding is carried out, and a subsequent waxing solution is brightened and waterproof and is easy to scatter unevenly are solved.

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.

To provide a transparentizing agent that can be used to obtain a transparent paper having excellent transparency and temporal stability using a bio-derived raw material.SOLUTION: A transparentizing agent contains polyester resin components comprising reaction products of raw material components including (A) rosins, (B) polyvalent carboxylic acids, (C) polyols, and (D) aliphatic monocarboxylic acids, wherein the acid value of the polyester resin component is 100 mgKOH / g or under, the weight-average molecular weight of the polyester resin component is 1,000,000 or under, and the refractive index of the polyester resin component is 1.40 or over and 1.60 or under.SELECTED DRAWING: None

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.

Provided is a novel method for manufacturing a pulp product endowed with liquid repellency by using a method for manufacturing a pulp product, said method 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.

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.