Method for producing starch binding for surface paper sizing

FIELD: chemistry.

SUBSTANCE: simultaneous supply of persulphate ammonium, sodium or potassium solution is performed into a digester of natural starch, in the amount of 0.25-0.60 wt % of absolutely dry starch and water in an amount providing the concentration of starch suspension in the range of 8-16 wt %. The resulting suspension is cooked at 110-130°C for 30-40 seconds, after which it is diluted with water to a concentration of 3-10 wt %. The process is carried out continuously.

EFFECT: reducing the duration of cooking binder, increasing the productivity of the process and reducing the consumption of oxidizer while maintaining the high quality of the binder.

1 tbl, 4 ex

 



 

Same patents:

FIELD: textiles, paper.

SUBSTANCE: invention relates to pulp and paper industry and relates to a method and system of use of starches with a low content of fatty acids in the sizing composition for paper, to inhibit the precipitation of multivalent salts of fatty acids. The method of inhibiting the precipitation of multivalent saturated fatty acids on the equipment and/or devices for sizing of paper consists in using the composition for sizing the paper surface, containing elevated levels of starch solids for sizing the surface, and the source of polyvalent cations, such as drying salt of multivalent metal, by including (wholly or partially) one or more starches with low content of fatty acids for sizing the surface in the composition for sizing the paper surface.

EFFECT: invention provides a sized paper having improved properties.

24 cl, 4 dwg

FIELD: textiles, paper.

SUBSTANCE: invention relates to compositions for coating of printing paper, at that the said compositions comprise microfibrillated cellulose (MFC) and one or more polysaccharide hydrocolloids, and the application of the said compositions. In addition, the invention relates to the coated paper comprising a first layer of polysaccharide hydrocolloid(s) and a second layer of MFC, and the use of the said paper.

EFFECT: reduction of garnetting or fuzzing of paper.

20 cl, 13 dwg

FIELD: textiles, paper.

SUBSTANCE: cardboard comprises solid cardboard substrate of bleached sulphate pulp (BSP) and a coating applied to the cardboard substrate to form a coated structure. The said coated structure has a surface density, thickness of the sheet and the Parker surface smoothness. The Parker surface smoothness is at most about 3 microns, and the surface density is at most about Y2 or Y3 or Y4 pound/3000 foot2, where Y2, Y3 and Y4 are functions of the said thickness (X) of the sheet in points which are calculated using the equation: Y2=3.71+13.14X-0.1602X2 or Y3=3.63+12.85X-0.1566X2, or Y4=3.50+12.41X-0.1513X2.

EFFECT: invention provides a coated cardboard with increased smoothness with the required parameters of thickness and the surface density to ensure high-quality printing.

13 cl, 10 dwg, 1 tbl, 6 ex

FIELD: textiles, paper.

SUBSTANCE: paper base is intended for internal and external sizing, which has high dimensional stability, and can be used in pulp and paper industry. Paper base contains cellulose fibers, at least one filler, and sizing agent. At that the paper base has a coefficient of hygroextension from 0.6 to 1.5%. The Scott internal constraint in the transverse direction is not greater than 300 J/m2, and/or Scott internal constraint in the longitudinal direction is not greater than 300 J/m2. Also a method of manufacturing the paper base and versions of paper base are proposed.

EFFECT: increased dimensional stability and durability of the surface of the paper base.

26 cl, 24 dwg, 15 tbl, 5 ex

FIELD: paper industry.

SUBSTANCE: paper product comprises a substrate selected from paper or cardboard, and a coating on the substrate with voids in it. The coating on the substrate comprises a water soluble polymer. The water-soluble polymer is selected from a group consisting of starch, waxy corn starch, protein, polyvinyl alcohol, casein, gelatin, soybean protein, and alginates. The coating additionally comprises a crosslinking agent. The paper product is substantially free of an elastomeric material. A method of processing a substrate for the paper product comprises coating an aqueous solution of the polymer on the film substrate, fixation of an aqueous solution of the polymer by contacting of the aqueous solution of the polymer with a heated surface up to formation of voids in the film. The phase of fixation comprises at least a partial drying of aqueous polymer solution.

EFFECT: obtained paper product is characterised with improved smoothness with no increase in density and has excellent printability.

27 cl, 3 ex, 1 tbl, 17 dwg

FIELD: textile, paper.

SUBSTANCE: paper base is designed to form a decorative material of a coating. It represents a non-processed paper containing a white pigment and/or fillers and is coated with a covering solution, containing at least one water-soluble modified starch with special distribution of molecules according to molecular weight. Also a decorative paper or decorative material is proposed to form coatings with application of the above-specified paper-base.

EFFECT: improved quality of a finished product due to increased inner strength of fixation with high non-transparency and other mechanical properties, improved stability of paper size stability and increased average size of its pores.

7 cl, 2 tbl, 6 ex

FIELD: textile, paper.

SUBSTANCE: method includes formation of composition, containing water, raw starch and powder optical refining agent. Boiling of composition. Application of finished composition, at least on one surface of paper or cardboard base in coating press. Then base is dried. In another version of method composition is boiled at the temperature up to 299°F inclusive.

EFFECT: improved brightness of paper and cardboard.

7 cl, 4 dwg, 8 tbl, 1 ex

FIELD: paper industry.

SUBSTANCE: paper with improved rigidity and bulk and method of its manufacturing may be used in pulp and paper industry and are intended for photocopier equipment. Paper comprises three-layer double-tee structure that forms a single web. It has central core layer manufactured mainly from cellulose, bulk of which is increased with the help of filler, such as hydrazine salt. Starch-based coating is applied on both sides of core layer, at the same time starch has high content of solid products. Coating forms three-layer paper having composite structure with outer layers of high strength that surround core of low density.

EFFECT: improved strength, rigidity and resistance to twisting of produced material.

32 cl, 2 dwg, 3 tbl, 3 ex

FIELD: textiles, paper.

SUBSTANCE: paper or cardboard of improved rigidity and bulk are meant for reproducing equipment and the method refers to production of the said paper and cardboard. The paper or cardboard has the core layer and starch-based layers applied by gluing-up on its both sides forming the uniform canvas of the double-T structure. The layers cover the upper and the lower surface of the central layer with minimal penetration to the central layer. The starch contains the filler spreading to the central layer. The starch has high content of solid products. The mass of the coating layers is 2-10 g/m2. Method for producing paper or cardboard includes the following stages: a) creation of composition containing cellulose fibers and the filler, b) formation of fibrous canvas, c) drying of the fibrous canvas, d) processing by gluing-up both sides of the dried canvas with the starch with filler and e) drying of the fibrous canvas with formation of the three-layer making the uniform canvas material with the double-T structure.

EFFECT: increased quality of paper or cardboard due to increased smoothness, decreased hygroscopic expansivity, improved fold resistance and paper rolling resistance.

30 cl, 2 dwg, 3 tbl, 3 ex

FIELD: textiles; paper.

SUBSTANCE: composition is designed for refining fibrous material, can be used in the production of enamelled cardboard and paper and relates to the cellulose-paper industry. The composition contains a modified pigment and a water soluble binding substance. The pigment is calcium sulfoaluminate, modified starch or polyvinyl alcohol with mass ratio content of 0.5-1.5. The water soluble binding substance is starch.

EFFECT: resistance to fluffing and whiteness of the coating with considerable lowering of consumption of the binding substance when making the composition.

1 tbl

FIELD: textiles, paper.

SUBSTANCE: invention relates to pulp and paper industry and relates to a method and system of use of starches with a low content of fatty acids in the sizing composition for paper, to inhibit the precipitation of multivalent salts of fatty acids. The method of inhibiting the precipitation of multivalent saturated fatty acids on the equipment and/or devices for sizing of paper consists in using the composition for sizing the paper surface, containing elevated levels of starch solids for sizing the surface, and the source of polyvalent cations, such as drying salt of multivalent metal, by including (wholly or partially) one or more starches with low content of fatty acids for sizing the surface in the composition for sizing the paper surface.

EFFECT: invention provides a sized paper having improved properties.

24 cl, 4 dwg

FIELD: textiles, paper.

SUBSTANCE: paper base is intended for internal and external sizing, which has high dimensional stability, and can be used in pulp and paper industry. Paper base contains cellulose fibers, at least one filler, and sizing agent. At that the paper base has a coefficient of hygroextension from 0.6 to 1.5%. The Scott internal constraint in the transverse direction is not greater than 300 J/m2, and/or Scott internal constraint in the longitudinal direction is not greater than 300 J/m2. Also a method of manufacturing the paper base and versions of paper base are proposed.

EFFECT: increased dimensional stability and durability of the surface of the paper base.

26 cl, 24 dwg, 15 tbl, 5 ex

FIELD: textile, paper.

SUBSTANCE: method includes moistening pulp lap with water solution of sodium salt of carboxymethylcellulose (NaCMC), included into composition of the paste made of a filler (chalk), mixed with a solution of NaCMC at the filler ratio of NaCMC equal to 100:(1-2). Production of moisture-saturated air suspension of fibres with filler from it. Forming a fibrous later on a shaping mesh. Moistening of a fibrous layer between two clothes, pressing and drying of a paper leaf. The filler is added as a paste, which contains 30% of dry substance. Moistening of a fibrous layer prior to pressing is carried out with a starch solution with concentration of 0.7-1.3%.

EFFECT: increased retention of filler in paper at simultaneous increase of paper strength index.

3 cl, 1 tbl, 4 ex

FIELD: textile, paper.

SUBSTANCE: paper base is designed to form a decorative material of a coating. It represents a non-processed paper containing a white pigment and/or fillers and is coated with a covering solution, containing at least one water-soluble modified starch with special distribution of molecules according to molecular weight. Also a decorative paper or decorative material is proposed to form coatings with application of the above-specified paper-base.

EFFECT: improved quality of a finished product due to increased inner strength of fixation with high non-transparency and other mechanical properties, improved stability of paper size stability and increased average size of its pores.

7 cl, 2 tbl, 6 ex

FIELD: textile, paper.

SUBSTANCE: method relates to paper or cardboard production and can be used on pulp-and-paper industry. Part of paper pulp fiber is treated with a polymer at least within two stages. Paper pulp treated with the polymer is mixed with remaining non-treated paper pulp. The mixed paper pulp is dehydrated on a net conveyor for forming fibrous web.

EFFECT: increase of strength without negative effect upon paper or cardboard volume with decreasing quantity of adding polymers and enhancing economical efficiency of the process.

14 cl, 4 dwg, 2 ex

FIELD: papermaking industry.

SUBSTANCE: paper is produced from matrix obtained from composition containing pulp fibers, filler particles and retention system for said filler based on composition comprising complex of granules of ionic non-destructed swelled starch and ionic latex in aqueous carrier. Said composition contains from 60% to 95% by weight of said granules and form 40% to 5% by weight of latex of total 100 wt% on the basis of total content of solid substances of granules and latex. Granules are latex particles carriers in said complex. Processing of carrier involves producing composition of swelled starch-latex prepared in the presence of combined-action admixture or in the absence thereof, and adding said composition to filler suspension for producing of paper having improved retention of filler and allows paper to be produced, which contains filler wherein filler admixture produces minimal negative effect upon strength characteristics. Starch-latex composition may be used with compositions free of wood or with wood-containing compositions. Processed filler is readily retained in paper web in the process of paper making, improves dehydration and creates well-formed sheets. Sheets manufactured with the use of processed filler have higher adhesion strength and tensile strength as compared to sheets containing filler processed with the use of only swelled starch or only latex.

EFFECT: improved quality of paper produced with the use of starch-latex composition.

41 cl, 4 dwg, 4 tbl, 4 ex

FIELD: pulp and paper industry; methods of production of the pigment for manufacture of the cardboard and paper.

SUBSTANCE: the invention is pertaining to the method of production of the pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. Calcium carbonate is treated with aluminum sulfate in the aqueous medium. The treatment is conducted at aluminum sulfate consumption of 25-105 % to the mass of absolutely dry calcium carbonate at the temperature of 80-85°С during 90-180 minutes with production of the suspension containing 25-35 % dry substances in it. At that they use the aqueous medium containing the binding chosen from the group, which includes starch and polyvinyl alcohol in the amount of 0.5-3.0 mass % from the mass of the absolutely dry pigment, and-or the water soluble colorant in the amount of 0.1-0.5 mass % from the mass of the absolutely dry pigment. The suspension is additionally dried and grinded. The technical result of the invention is the improved quality of the pigment as well as expansion of its field of application.

EFFECT: the invention ensures the improved quality of the pigment as well as expansion of its field of application.

2 tbl

FIELD: pulp and paper industry; methods of production of the pigment for manufacture of the cardboard and paper.

SUBSTANCE: the invention is pertaining to the method of production of the pigment for manufacture of the cardboard and paper and may be used in pulp and paper industry at production of the filled paper, the coated paper and the cardboard. In the water at intense stirring feed powders of calcium hydrate and calcium carbonate at the ratio of the indicated components accordingly from 1.0:2.2 up to 1.0:12.9. The produced suspension is gradually added with aluminum sulfate at its ratio to the total mass of the calcium hydroxide and calcium carbonate from 1.0:0.85 up to 1.0:4.30. Then the temperature of the mixture is increased up to 8О-85°С and the produced reaction mixture is kept at stirring within 90-180 minutes with formation of the dispersion of the pigment with the share of the dry substances in it equal to 20-35 %. Then the dispersion is dried and grinded into the powder. The powder is dispersed in the water containing the given amount of the dissolved coolant and-or binding - starch or polyvinyl alcohol. The technical result of the invention production of the pigment with the new properties, that allow to expand the field of its application at manufacture of various types of the cardboard and the paper.

EFFECT: the invention ensures production of the pigment with the new properties, expansion of the field of its application at manufacture of various types of the cardboard and the paper.

2 tbl

FIELD: paper-and-pulp industry.

SUBSTANCE: invention relates to pigment, which can be used in manufacture of paper with filler, coated paper, and cardboard. Calcium hydroxide and calcium carbonate powders taken in proportion between 1.0:2.2 and 1.0:23.5 are added to vigorously stirred water, after which temperature of mixture is raised to 80-85°C and resulting reaction mixture is kept being stirred for 90-180 min to form dispersion of pigment containing 20-35% solids.

EFFECT: improved quality of pigment at lower cost and extended application area.

3 tbl

FIELD: improvement of glazed piper and board printing properties and coverability.

SUBSTANCE: claimed method includes addition to fibrous starting material polysaccharide and at least dispersed polymer, containing hydrophobic monomers, as hydrophobic agent. As polysaccharide cationic, non-ionic and/or anionic starch are used. Styrene, butadiene, vinylacetate, acrylonitrile, and/or acrylates, preferably styrene, butadiene, and/or acrylates are used to produce polymer dispersion. Polymer dispersion is obtained by emulsion polymerization. Mixture added to starting fibrous material for paper production contains polysaccharide and at least dispersed polymer, containing hydrophobic monomers, as hydrophobic agent.

EFFECT: paper and board with improved printing characteristics.

28 cl, 1 dwg, 5 tbl, 4 ex

FIELD: production of improved starch compositions and methods of use of improved starch compositions.

SUBSTANCE: proposed method includes use of starch component containing cationized cross-linked starch at viscosity of from 10 to 3000 cps. Production of paper includes the following stages: boiling the starch component at temperature of 165°C, dehydration of paper composition (paper fibers, inorganic filler, starch) and control of rate of dehydration and/or holding the first pass in the course of dehydration through change in temperature (by at least 10°C) of starch composition boiling.

EFFECT: possibility of performing modifications in accordance with variants on wet end of paper machine.

21 cl, 6 dwg, 2 tbl

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