"roll covering material "lifan and method of manufacturing"
(57) Abstract:The inventive material based on cellulose fibers and filler further comprises a sizing agent and a hardening additive in the following ratio, wt.% filler - T,5 - 4,5. sizing substance - 0,2 - 2,5, hardening additive - 0.3 to 5.0 and cellulose fiber - else If necessary use dyes and modify the amount accordingly from 0.01 to 2.0 wt% and 0.01-0.1 wt.% As the cellulose fibers are used mainly coniferous pulp with a beating degree of 60-85° In the method of manufacturing a roll of facing material hardening additive is introduced before forming blade, and the dehydration and drying of the formed fabric is carried out at successive build-up of vacuum and temperature 2 SPF-ly 1 GBF-ly, 2 tsbl
FIELD: mining industry and mechanical engineering.
SUBSTANCE: the invention is dealt with methods of production of a paper, in particular, with its smoothing. The water suspension containing cellulose fibers and optional fillers (i) add the sizing dispersion containing a sizing agent and a polymer including one or several aromatic groups and (ii) a sizing promoter containing a polymer intercalating one or several aromatic groups. Mould and dry the produced suspension. The sizing dispersion and sizing promoter are added to the water suspension separately. The invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.
EFFECT: the invention ensures improvement of the process of sizing the cellulose fibers having a high conductivity.
41 cl, 6 tbl, 6 ex
FIELD: stabilized dispersions.
SUBSTANCE: invention relates to emulsification and colloidal stabilization of emulsions and dispersions of hydrophobic phases in aqueous phases using a coacervate. In particular, stable emulsified or dispersed composition of invention, including hydrophobic and aqueous phases, is stabilized by cationic colloidal coacervate stabilizer including anionic and cationic components in a proportion ensuring zeta potential of the composition to be at least 20 mV. Preferred hydrophobic phase is non-colophony reactive or non-reactive sizing substance, although employment of coacervate allows stable emulsions or dispersions of mixtures of colophony and non-colophony sizing substances to be obtained. Furthermore, methods of obtaining and using stable emulsions or dispersions as well as sized paper made using emulsified or dispersed coacervate-stabilized sizing substance are described.
EFFECT: enhanced stabilization of emulsions and dispersions.
139 cl, 1 dwg, 3 tbl, 16 ex
FIELD: gluing and sizing compositions.
SUBSTANCE: invention relates to the essentially anhydrous sizing composition and an aqueous sizing composition used in sizing paper and cardboard. Essentially anhydrous and an aqueous sizing compositions comprise gluing substance, non-ionogenic surface-active substance, an anionic surface-active substance and a monohydric alcohol. Method for preparing an aqueous composition involves homogenization of gluing substance in the presence of surface-active substances and monohydric alcohol. Invention provides preparing sizing compositions that can be homogenized easily, i. e. they represent dispersions or emulsions formed by application of insignificant shearing forces, for example, such as stirring and provides preparing sizing compositions that are stable in storage.
EFFECT: improved preparing method, improved and valuable properties of compositions.
15 cl, 6 tbl, 3 ex
FIELD: pulp-and-paper industry, in particular, sizing of paper with the use of aqueous composition.
SUBSTANCE: method involves producing aqueous composition of cellulose filaments and dehydrating paper web; adding aqueous composition to cellulose suspension, said aqueous composition comprising sizing substance aggregates; producing aqueous composition by mixing in any order before adding into aqueous suspension of aqueous solution containing at least one coagulant and aqueous dispersion containing sizing substance. Zeta-potential of composition is below 20 mV.
EFFECT: increased efficiency and simplified method.
26 cl, 5 tbl, 3 ex
FIELD: method for inner sizing of cardboard for packing of liquid products, water-repellent adhesive substance for inner sizing, cardboard for packing of liquid products, package for liquid products and use of adhesive substance for inner sizing.
SUBSTANCE: the adhesive substance for inner sizing includes the derivative of oxytanon of formula (1), typically 2-oxytanon of formula (II). Formulae (I), (II) are given in the invention description. In the derivative of oxytanon of formula (I) n has the value from 0 to 6. In formulas (I) and (II) R represents hydrogen or linear hydrocarbon chain, and R`, R``, R``` represent hydrocarbon chains: R` and R`` are mainly obtained from non-branched linear fatty acids, R```-linear or branched alcyl chain or acyclic alcyl chain.
EFFECT: provided improved method for inner sizing of cardboard for packing of liquid products, improved cardboard for packing of liquid products, package for liquid products manufactured from such a cardboard.
21 cl, 3 tbl
FIELD: manufacture of a tub-sized paper or board sheet, applicable in wood-pulp and paper industry.
SUBSTANCE: the method consists in application at least on one side of the sheet of an aqueous compound of adhesive substance in amounts not exceeding 5 g/cu.m. The content of the solid substance in the applied adhesive compound makes up at least 15%. The aqueous compound is applied on one side of the sheet after its drying in a drying section of the machine for manufacture of paper or board. After that the adhesive compound is embedded in the sheet surface.
EFFECT: reduced power of the drying section of the machine for manufacture of paper or board and provided reduction of investments and reduction of the length of the paper-making line.
FIELD: pulp-and-paper industry, in particular paper or board production.
SUBSTANCE: claimed method includes providing of slurry containing cellulose fiber and at least sizing agent interacting with cellulose. Sizing agent is selected from group containing ketene dimmers and acid anhydrides. Cationic vinyl polymer obtained by additional polymerization, containing aromatic units and anionic vinyl polymer obtained by additional polymerization and having molecular mass from 6000-100000 are introduced into slurry. Then obtained slurry is dehydrated and paper leaf is formed.
EFFECT: increased effectiveness of sizing, dehydration and retention.
11 cl, 3 tbl, 2 ex
FIELD: food industry; packing.
SUBSTANCE: invention relates to packing material containing base paper or cardboard layer for packing container formed by bending and welding the sheet, or flat blank of packing material. Laminated packing material has base paper or cardboard layer and outer coatings from both sides of base layer made of thermoweldable polymer impermeable to liquids. Said paper or cardboard base layer is made water-repelling by sizing the mass by water dispersoid solution or emulsion of alkylketene dimer or mixture of alkylketene dimers so that content of alkylketene dimer (dimers)in base layer is from 0.25 to 0.4 by dry weight, weight %. Invention contains description of method of manufacture of laminated material and packing container to be sterilized.
EFFECT: provision of laminated packing material protected from penetration of hot steam or liquid designed for packing food products and capable of withstanding heat treatment in autoclave at high humidity and temperature without separation of packing material into layers.
6 cl, 2 dwg
FIELD: paper-and-pulp industry.
SUBSTANCE: cellulose product contains clay having stacking of atomic planes 2R2. Product represents paper of fibrous pulp, while clay has cationic nature. Preparation of product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding clay having stacking of atomic planes 2R2.to suspension; and dehydrating thus prepared suspension. Another method of preparing cellulose product comprises: providing aqueous suspension containing cellulose fibers and optionally filler; adding cationic clay to suspension; adding one or several draining auxiliary substances enhancing retention of filler and containing at least one cationic polymer; and dehydrating thus prepared suspension.
EFFECT: reduced interfering and harmful substance in cellulose suspension and enhanced retention of filler, dehydrating agents, and sizing agents.
27 cl, 14 tbl, 13 ex
FIELD: polymer materials in paper-and-pulp industry.
SUBSTANCE: invention relates to manufacturing cellulose-polymer composites that can be, in particular, used in production paper or cardboard. Method according to invention providing a composition and manufacturing sheet therefrom followed by drying. In the method of invention, aqueous nanodispersion of polyorganosiloxanes is utilized, which can be introduced into composition or can be deposited onto sheet before drying on size press or after drying of sheet to moisture content not less than 12°.
EFFECT: improved waterproofness, increased inflammation temperature, and improved physicochemical characteristics of material.
FIELD: textile, paper.
SUBSTANCE: according to one version, method includes provision of aqueous suspension that contains cellulose fibres. Addition of cation polysaccharide and polymer P2, which is an anion polymer, to produced suspension after all points of high polymer P1 shearing force, and P1 polymer is an anion polymer. Then water is removed from produced suspension to form paper. According to the other version, auxiliary agents are added for drainage and retention to produced suspension of cellulose fibres after all points of high shearing force. The latter are represented by a cation polysaccharide and polymer P2, being an anion polymer.
EFFECT: improved drainage without deterioration in retention and forming of paper, increased speed of paper-making machine and application of lower doses of polymer.
34 cl, 5 tbl, 5 ex
FIELD: textile, paper.
SUBSTANCE: full bleaching/extraction of craft cellulose fibres is carried out with a chorine agent. Afterwards fibres are washed and exposed to contact in solution with at least one optical bleach (OB) upstream the mixing box and the discharge box of the machine. Fibres in solution have consistency from 7 to 15%, pH of solution in process of contact of fibres with OB makes from 3.5 to 5.5, temperature of contact makes from 60 to 80°C, and time of contact is from 0.5 to 6 hours. Additional contact of OB with fibres is carried out in the device for coating application or in the gluing press. Contact may be carried out at the stage of storage, both at high density and low density of the craft-cellulose fibres, and also at the stage of refinement.
EFFECT: improved whiteness and brightness of fibres when using lower quantity of OB.
19 cl, 11 dwg, 12 tbl, 6 ex
FIELD: textile, paper.
SUBSTANCE: method includes provision of a thick mixture of suspension, which contains wood mass and a filler. The thick suspension mix is dissolved to form a diluted mix of suspension, in which the filler is available in amount of at least 10 wt % in terms of dry mass of dissolved suspension mix. The thick mix and/or dissolved mix of the suspension are flocculated, using a polymer system of retention/dehydration. The dissolved mixture of suspension is dehydrated on a sieve to form a sheet, and then the sheet is dried. The polymer system of retention/dehydration contains the following: i) a water-soluble branched anion-active polymer and ii) a water-soluble cation-active or amphoteric polymer. The method may be realised on paper-making machines of quick dehydration, such as GAP former.
EFFECT: improved retention of ash with reduction of dehydration.
16 cl, 26 dwg, 46 tbl, 16 ex
FIELD: textile, paper.
SUBSTANCE: method includes provision of a thick mixture of cellulose suspension, which contains a filler. The thick suspension mass is dissolved to form a diluted mix of suspension, in which the filler is available in amount of at least 10 wt % in terms of dry mass of dissolved suspension mix. The thick mixture of suspension and/or dissolved mix are flocculated. Polymer system of retention/dehydration is used in flocculation. The dissolved mixture of suspension is dehydrated on a mesh to form a sheet, and then the sheet is dried. In this method the polymer system of retention/dehydration contains the following: i) a water-soluble branched anion-active polymer and ii) a water-soluble cation-active or amphoteric polymer. The anion-active polymer is available in the thick mixture or in the dissolved mixture of suspension prior to addition of cation-active or amphoteric polymer.
EFFECT: improved retention of ash relative to complete retention with higher quality of paper.
16 cl, 21 dwg, 32 tbl, 8 ex
FIELD: textiles, paper.
SUBSTANCE: method includes preparation of the first paper pulp from dispersion of paper fibers milled to the required fineness of grind by adding to it of cationic polyacrylamide, a second paper pulp from dispersion of mixture of bleached hardwood pulp, milled to the required fineness of grind, with a small amount of bleached softwood pulp by adding to the dispersion of bentonite 10-20 kg per ton of dry fiber, and then the suspension of mixture of talc and chalk in the amount of 50-200 kg per ton of fiber, and then the emulsion of alkenyl succinic anhydride stabilised with starch. Cationic polyacrylamide is added the last. The suspension of chalk and talc is prepared in a mixer under conditions providing intensive abrasing effect of chalk particles on talc particles. Talc contains at least 80% of particles with a size of 5-50 mcm and not less than 70% of particles with a size of 5-30 mcm.
EFFECT: improvement of the method.
4 cl, 1 tbl, 3 ex
FIELD: technological processes; chemistry.
SUBSTANCE: invention can be used to manufacture attrition-resistant paper in production of laminated panels for floor covering. The paper is impregated by resin and contains attrition-resistant particles, consisting of silicium carbide, aluminium and/or corundum oxide. The particles are covered by silaned adhesion activating agent and are built into the resin matrix. The method of paper manufacturing includes impregnating the paper with resin, spreading attrition-resistant particles along, coated by adhesion activatin agent, along the paper, and then curing the resing by pressurising the paper with other impregnated paper, or with fibers and resin along with heating. The device used to spread the particles along the paper includes rotating shaft with recesses and the brush, located near the shaft, and installed so that to sweep the particles out of the recesses, as well as device to move the paperalong under the shaft. Laminated panel consists of ornamental paper, coated by attrition-resistant layer, applied to base plate, made from wood.
EFFECT: increase of paper attrition resistance and simplificaiton of manufacturing method.
11 cl, 3 dwg
FIELD: textiles, paper.
SUBSTANCE: wear proof particles are treated with adhesion promoter based on silane or sylon and then deposited on paper, impregnated with resin, thereby obtaining coating. Fibre is electrically charged and put onto the coating. Drying is then carried out. The device for implementing the given method has a equipment for depositing wear proof particles on paper, equipment for charging fibre and putting the charged fibre onto the paper. The latter consists of a roller with depressions, made with provision for rotating, and a brush mounted near the roller for cleaning the depressions. The device also has apparatus for electrically charging the roller and/or the brush and the roller, which is made with provision for rotation and passing paper sheets under the roller with depressions. Paper, made using this technique, has a wear proof coating and electrically charged fibres on the wear proof coating. The charged fibres used can be made from polyester and/or cotton, and/or cotton linter.
EFFECT: obtaining wear proof paper with improved properties.
14 cl, 3 dwg
SUBSTANCE: coating is a matrix material into which a mixture of high-strength particles having an irregular shape and spherical solid particles essentially without cutting edges are added. The high-strength particles have Mohs hardness of at least 6, and the solid particles have Mohs hardness of at least 3, where the average diametre of the solid particles is equal to or less than the average diametre of the high-strength particles. The matrix material is a synthetic resin based on melamine, acrylate, epoxide, polyurethane, polyamide, polyester, polyimide, caoutchouc, rubber or mixtures thereof. Said wear-proof coating can be used to make wear-resistant surfaces on wooden materials, decorative paper or wood-fibre boards having a decorative print, in making parquet floors, laminated floors, furniture surfaces and working surfaces, as well as for making wear-resistant surfaces of layers on substrates made from metal, glass, ceramic, plastic, concrete or other materials.
EFFECT: high wear resistance of the wear-proof coating without increasing wearing of the press plate or belt press.
16 cl, 2 dwg, 6 tbl
SUBSTANCE: ground contains cation water-fast additive, alkaline glueing agent and anion activator in specified amount. Anion activator it contains is a component selected from group, including polyacrylate, sulfonate, carboxymethylcellulose and galactomannan hemicellulose. Ground paper has pH from approximately 7.0 to approximately 10, and strength of internal link from approximately 25 to approximately 350 millifeet per pound per square inch. This ground paper is produced by contact of a certain amount of cellulose fibres with water-fast additive, alkaline gluing agent and anion activator, serially and/or simultaneously.
EFFECT: improved physical properties of ground paper and expanded assortment of paper tapes to cover joints.
22 cl, 1 dwg, 1 ex
FIELD: printing industry.
SUBSTANCE: decorative paper contains a paper base and an ink-absorbent layer. At the same time the ink-absorbent layer is dyed so that the decorative paper after soaking with impregnating resins and pressing as laminate has the same dye, as well as dyeing of laminate from decorative paper, which does not include the ink-absorbent layer. The latter contains a dyeing pigment and/or colorant in the amount rated for a weight of a dry absorbent ink and makes from 45 to 75%.
EFFECT: reduced quantity of a filler and a pigment in the paper base without deterioration of coverage of the proposed decorative paper.
8 cl, 3 tbl, 9 ex