A method of manufacturing a multilayer paper for the major layers of decorative paper laminate
(57) Abstract:Usage: paper production for the major layers of decorative paper laminate. The essence of the original fibrous semi - bleached sulfate hardwood pulp and unbleached coniferous sulphate pulp grind separately. From milled bleached Kraft hardwood pulp preparing a suspension for low tide one of the outer layers, and from milled unbleached coniferous sulphate pulp preparing a suspension to reflux of the other layers. Vlagoperenosu additive - polyaminoamidazolines resin injected into both suspension for tint all layers in the fibrous suspension of bleached Kraft hardwood pulp in the amount of 0.05-0.15% of absolutely dry fiber, and the suspension of unbleached coniferous sulphate pulp - 0,02-0,075% of absolutely dry fiber. From the prepared suspensions cast elemental layers, with the outer layer of bleached Kraft hardwood pulp is 15-50% of the total weight of all the layers. Elementary layers were combined, obtained multilayer paper is pressed and dried. 1 C. p. F.-ly, 3 tables. The invention relates to the production of multi-layer waterproof paper and can biogo paper laminate (DBSP).A known method of manufacturing a multilayer paper for the major layers of decorative paper laminate comprising a grinding unbleached sulphate pulp, ebb outer and inner layers, connect them, pressing and drying, the cellulose for the outer layers to grind 21-230SHR and internal to 26-350SHR /1/.This method allows you to get a paper with a capillary-porous structure, providing the necessary primariamente paper and uniform distribution of the binder. However, the technology of processing of such paper is low due to the lack of strength in the wet state.The closest in technical essence and the achieved result to the invention is a method of manufacturing a multilayer paper for the main (inner) layers of decorative paper laminate, including the refining of bleached Kraft hardwood pulp and unbleached coniferous sulphate pulp cooking fibrous suspension, the introduction blagopoluchnaya supplements polyaminoamidazolines resin, ebb outer and inner layers, connect them, pressing and drying. The grinding is subjected to a mixture of bleached sulphate Lis the suspension only for outer (top) layer and/or subsequent layers, the total mass of which is 25-50% of the total mass of all elementary layers. And vlagoperenosu additive is used in an amount of 0.1 to 0.3% by weight of the absolutely dry fibers each elementary layer /2/.This known method of producing paper allows to increase the adaptability of its processing in plastic.The aim of the invention is to increase the strength and impregnating paper properties and from the plastic while subsequent intensification of the process of paper recycling in plastic.The aim is achieved in that in the method of manufacturing a multilayer paper for the major layers of decorative paper laminate, including the refining of bleached Kraft hardwood pulp and unbleached coniferous sulphate pulp cooking fibrous suspension, the introduction blagopoluchnaya supplements polyaminoamidazolines resin, ebb inner and outer layers connect them, pressing and drying, bleached sulphate hardwood pulp and unbleached coniferous sulphate pulp grind separately from milled bleached Kraft hardwood pulp preparing a suspension for low tide one of the outer layers of rasmala the additive is introduced in both suspension for tint all layers when this outer layer of bleached Kraft hardwood pulp moulded mass, component 15-50% of the total weight of all the layers. Vlagoperenosu additive in the suspension of bleached Kraft hardwood pulp is injected in a quantity of 0.05 to 0.15% by weight of the absolutely dry fiber, and the suspension of unbleached coniferous sulphate pulp in the amount of 0.02-0,075% by weight of the absolutely dry fiber.The use of different fibrous semi-finished products for the formation of individual elementary layers allows the material with directional separation of the functions of its layers due to morphological structure and boomgaarden properties of softwood and hardwood pulp. Layers made of long, strong, flexible fibers of softwood cellulose tape form, perform a reinforcing function, and a layer of a more elastic fibers hardwood pulp tubular performs impregnating smallbusinesses functions. Introduction blagopoluchnaya additives in all layers captures the capillary-porous structure of the paper and provides a high level of strength in the wet state multi-layer paper as a whole and at the same time, the surface strength of the outer layer of hardwood pulp and between the Oh of cellulose is not possible to obtain a material with simultaneously high strength and impregnating properties.Example 1. Bleached sulphate hardwood pulp grind until 180SHR, unbleached coniferous sulphate pulp to 160SHR. From milled bleached Kraft hardwood pulp preparing a suspension for low tide one of the outer layers of unbleached coniferous sulphate pulp suspension for all other layers. In a suspension of bleached hardwood pulp is injected polyaminoamidazolines resin "Cumene" in the amount of 0.05% by weight of the absolutely dry fibers in the suspension of unbleached coniferous sulphate pulp impose the same resin in the amount of 0.075% by weight of the absolutely dry fiber. Cast four elementary layer, with one of the outer layers of the weight 24 g/m2comprising 15% by weight of all layers cast from a suspension of bleached hardwood pulp, and the remaining three layers of the suspension of unbleached coniferous sulphate pulp. Elementary layers were combined, subjected to co-extrusion and drying. The resulting paper weight 1 m2equal to 160 g, analyze. Then the paper is processed in decorative paper laminate. Trying to enter the package-preparation of the following composition: 1 sheet of paper overlay impregnated with an aqueous solution of melamine-formaldehyde resin to the content of sweetjane binder 50% four sheet obtained in example 1 laminated paper, saturated aqueous solution of phenol-formaldehyde resin content of the binder 30% of one sheet (compensatory) obtained in example 1 laminated paper impregnated with an aqueous solution of a phenol-formaldehyde resin content of the binder 36% When the set of package blanks DBSP for the decorative layer is placed multilayer paper outer layer of bleached pulp to the top. In this case, the layer of bleached pulp acts as a protective barrier layer, which, together with the decorative layer provides the opacity of the surface layer of the laminate. A sample of the plastic on the strength of the pack is pressed at a temperature of 140oC and specific pressure of 10 MPa.Example 2. Multi-layer paper and plastic get analogously to example 1. The difference lies in the fact that the degree of milling of hardwood pulp is 220SHR, softwood pulp 200SHR. In the fibrous suspension on the basis of the hardwood pulp is injected vlagoperenosu additive in the amount of 0.15% by weight of the absolutely dry fiber, and on the basis of softwood pulp to 0.05% by weight of the absolutely dry fiber. The weight of the outer layer of hardwood pulp is 80 g/m250% of the total weight of all the layers.Example 3. Me cellulose is the 200SHR, softwood pulp 180SHR. In the fibrous suspension on the basis of hardwood pulp vlagoperenosu the additive is introduced in the amount of 0.125 per cent on the basis of softwood pulp 0.06% of the Weight of all layers of the same 40 g/m225% of the total weight of all the layers.Example 4 (control). Multi-layer paper and plastic get analogously to example 1. The difference is that the degree of grinding of softwood and hardwood pulp same and is the 200SHR. The mass layer of hardwood pulp is 16 g/m210% of the total weight of all the layers.Example 5 (control). Multi-layer paper and plastic get analogously to example 2. The difference is that the weight of the layer of hardwood pulp is 88 g/m255% by weight of all the layers.Example 6 (the prototype). A mixture of unbleached coniferous sulphate pulp bleached Kraft hardwood pulp at a ratio of 1:3 grind until 230SHR. From milled cellulose prepared fibrous suspension. In the suspension to reflux outer (top) layer, which weight is 25% of the total mass of all elementary layers, enter polyaminoamidazolines resin in the amount of 0.3% by weight of the absolutely dry fibers of this elementardalinu examples 1-5. The resulting paper is processed into plastic analogously to example 1. The difference lies in the fact that the rate of impregnation of the paper obtained in examples 1-5 was 110-120 m/min, and the paper obtained according to example 6, 90 m/min Mode of manufacturing multilayer paper are given in table. 1, the results of the analysis of the paper samples in the table. 2. The test results of samples of laminates of paper produced by the proposed and the known methods described in the table. 3.Analysis of sample properties of laminated paper (PL. 2) shows that the proposed method allowed us to obtain a material with simultaneously higher strength and impregnating properties than the known method. Increases the strength of paper from 60 to 65-90 H. Significantly improved impregnating properties of paper: capillary absorption increases from 32 mm up to 36-40 mm Surface absorbency of the paper increases from 6 to 2-4 C.Processing of multi-layer paper laminate showed the possibility of a seamless transfer of the deep impregnation of the base paper at high speed impregnating machine. Testing of samples TBSP showed that in laminated plastic, paper, obtained by the proposed method, the reinforcing layers in rochestie properties with a slight increase its water resistance.Thus, the invention provides for achieving results and meets industrial applicability, as feasible on the existing equipment with the use of industrially produced semi-finished products and chemicals. 1. A method of manufacturing a multilayer paper for the major layers of decorative paper laminate, including the refining of bleached Kraft hardwood pulp and unbleached coniferous sulphate pulp cooking fibrous suspension, the introduction blagopoluchnaya supplements - polyaminoamidazolines resin, ebb inner and outer layers, their connection, pressing and drying, characterized in that bleached sulphate hardwood pulp and unbleached coniferous sulphate pulp grind separately from milled bleached Kraft hardwood pulp preparing a suspension for low tide one of the outer layers of milled unbleached coniferous sulphate pulp preparing a suspension to reflux of the other layers, and vlagoperenosu the additive is introduced in both suspension for tint all layers, with the outer layer of bleached Kraft hardwood pulp moulded mass, which is 15 to 50% of the total weight of all the layers.2. The way the public cellulose in a quantity of 0.05 to 0.15% by weight of the absolutely dry fiber, and in the suspension of unbleached coniferous sulphate pulp 0,02 0,075% by weight of the absolutely dry fiber.
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: paper; chemistry.
SUBSTANCE: method of cellulose fiber modification is realised in the following manner. Suspension mass of cellulose fibers is prepared. In process of its bleaching cellulose derivative is added in at least one stage of acid bleaching. pH of suspension mass is in the interval from approximately 1 to approximately 4, and temperature - in interval from approximately 30 to approximately 95°C. As cellulose derivative carboxy-alkyl-cellulose is used, for instance, carboxy-methyl-cellulose. From this suspension of bleached fiber mass paper is produced by means of dehydration of this suspension on the mesh with formation of paper.
EFFECT: higher strength in wet condition and softness of paper.
42 cl, 2 dwg, 1 ex
FIELD: textile, paper.
SUBSTANCE: method relates to paper production and can be used in pulp-and-paper industry. Method involves the use of cellulose suspension from cellulose fibres and fillers (optional), dehydration of cellulose suspension on grid or sieve so that a sheet can be formed. Then the sheet is dried. In this method there used is polymeric addition which includes ethylenically unsaturated monomer soluble in water or potentially soluble in water, and ethylenically unsaturated monomer containing a reactive group. The latter represents an epoxy group. The polymeric addition used has molar weight which is less than one million. Polymer is obtained from mixture of monomers, which includes acrylamide and glycidyl methacrylate. Thus, the obtained polymer is used as an addition for increase of paper durability in dry condition, in wet condition, as reagent for internal paper sizing and for surface sizing.
EFFECT: increasing paper durability.
17 cl, 2 tbl, 3 ex
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: textile, paper.
SUBSTANCE: cellulose product comprises thermoplastic microspheres and a charged aromatic acrylamide polymer. The method to produce a cellulose product includes provision of an aqueous solution of suspension that contains cellulose fibres. Addition of thermoplastic microspheres and the charged aromatic acrylamide polymer into the suspension, and dehydration of the produced suspension. Thus made cellulose product may be used as a cardboard for liquid packing.
EFFECT: reduced porosity of a cellulose product as its volume increases and improved resistance of a wick edge to penetration of aqueous liquids for cellulose products.
25 cl, 3 tbl, 4 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: composition contains a fibrous mixture from chemical and thermomechanical mass and cellulose. The fibrous mixture contains birch leached chemical and thermomechanical mass with extent of grinding 60-125 ml (CSF) and cellulose with grinding extent of 350-500 ml (CSF) at the specified ratio of components. The cellulose in the fibrous mixture is a leached pine sulfate cellulose and/or pine sulphite cellulose, or pine cellulose, and/or leaf cellulose.
EFFECT: expansion of leaf-bearing soft woods due to using birch leached chemical and thermomechanical mass to prepare a fibrous semi-finished product to produce paper with high physical mechanical indices to ensure extent of whiteness.
3 cl, 1 tbl
FIELD: textiles, paper.
SUBSTANCE: method includes providing a fiber-containing suspension, in which at least about 60% wt. fibers are cellulosic fibers, and dewatering the suspension on a wire mesh to form the cellulosic fibrous canvas. The method additionally comprises adding particles comprising silica and a reinforcing in the wet state agent in the moulded canvas. The present invention also relates to a product obtained by this method. The invention furthermore relates to an aqueous dispersion having a pH in the range from 2 to 7 and containing particles containing silica and the reinforcing in the wet state agent. Another aspect of the invention relates to the use of the dispersion as an additive in the papermaking process.
EFFECT: increasing strength and stiffness of the paper in the wet state.
17 cl, 3 ex, 6 tbl
FIELD: textiles, paper.
SUBSTANCE: invention relates to the pulp and paper industry and relates to napkin paper and a method of its production. The paper consists predominantly of a structure of two types of hydrophilic cellulosic fibres different in coarseness of fibres, and comprises a strength increasing additive. Two types of hydrophilic cellulosic fibres represent the first pulp, which has the fibre coarseness of from 0.13 to 0.16 mg/m, and the second pulp which has the fibre coarseness of from 0.17 to 0.20 mg/m. The difference in fibre coarseness between the first pulp and the second pulp is from 0.01 to 0.07 mg/m. The structure has a degree of fineness of 400 to 550 ml.
EFFECT: invention provides a napkin paper having good properties of strength and permeability.
18 cl, 8 dwg, 6 tbl, 4 ex
FIELD: textiles, paper.
SUBSTANCE: invention relates to paper products of sanitary and hygienic purposes, the structure of which comprises the fibrous paper web, an agent imparting a temporary wet strength, the composition of destructing agent, which comprises the destructing agent, a carrier which suppresses decomposition, and a non-ionogenic surfactant. The non-ionogenic surfactant stabilizes the viscosity of the composition over time. The composition of the destructing agent may be combined with an agent of temporary wet strength to obtain a paper product having high initial tensile strength in the wet state and the desired degradability. The invention also relates to methods of formation of a paper product and to the fluid capable of pumping the composition to decompose the agent of temporary wet strength, which is present in the structure of the fibrous web of the paper product.
EFFECT: improvement of the material.
22 cl, 1 tbl
FIELD: paper-and-pulp industry.
SUBSTANCE: when ground paper is manufactured, it is coated with ink-accepting coating. The latter contains latex binder, water-soluble binder, pigment mixture of amorphous silica with colloidal cationic silica and colloidal alumina, and ink-fixing agent. Coating operation is performed in two steps, weight ratio of coating applied in the first step to that in the second step ranging from 0.34:1 to 0.66:1. Reverse face of base paper is coated by detwisting coating. Further, coating is ennobled via superglazing at pressure in supercalender roll gap 30-75 bar.
EFFECT: improved workability of process and improved quality of paper due to increased surface strength.
4 cl, 7 ex
FIELD: pulp-and-paper industry, in particular production of multilayered cellulose product preferably paper or paperboard.
SUBSTANCE: claimed method includes filler application between at least two layers of moving fibrous material before bonding thereof with one another. In preferable embodiment inorganic filler is used optionally containing organic components. In the most preferable embodiment calcium sulfate is used.
EFFECT: paper with better optical characteristic such as whiteness and opacity without losses of mechanical properties.
42 cl, 7 dwg
FIELD: paper and pulp industry.
SUBSTANCE: method comprises applying glue at least on the first layer by passing the first layer between the counter-pressing cylinder and roller for batching glue, setting the second layer in the region of the first layer and in the contact with the glue applied on the first layer, and gluing the first layer to the second layer between the counter-pressing cylinder and gluing roller. The glue is applied in the zones of projecting bosses provided on the glue batching roller . The density and sizes of the bosses are chosen to provide sufficient amount of glue between two layers. The device comprises counter-pressing roller provided with a number of bosses and engaging the batcher of glue, pressing roller, and gluing roller.
EFFECT: enhanced adhesion.
40 cl, 8 dwg
FIELD: cellulose-paper industry.
SUBSTANCE: device for continuous connection of paper sheets contains means useable to press aforementioned sheets 5,6 on printing cylinder or shaft 4, simultaneously moving sheets to outlet section of device. Aforementioned means for pressing contains shaft or cylinder 2 provided with rigid external surface, supported by elastic surface positioned below it. Method for connecting two sheets of paper 5,6 contains stage of pressing of sheets between pressing shaft or cylinder 2, provided with rigid external surface and elastic surface positioned below it, and printing cylinder or shaft 4, provided with relief and/or recesses across the surface.
EFFECT: increased quality due to prevention of unwanted deformations of surface of connected sheets, simple manufacture, economic efficiency, extensive service life.
2 cl, 23 dwg
FIELD: banking system.
SUBSTANCE: invention relates to valuable documents with increase period of circulation, such as bank notes, cheques, passports, identity cards or other similar documents, to paper protected from forcing for use in making of valuable documents and method of making of valuable documents and method of production of force-protected paper and like valuable documents. Valuable documents is made on paper sheet which is provided with local strengthening passing along at least part of one or several edges of paper sheet. Strengthening is made using one or several means chosen from group consisting of fibers, layer of lacquer and strips of film material. Proposed valuable document features increased tear resistance and possibility of longer circulation and by other characteristics it does not differ from known valuable documents.
EFFECT: increase service life of valuable documents.
35 cl, 12 dwg
FIELD: packing industry.
SUBSTANCE: invention relates to production of ecologically safe packages and refers to a cigarette pack comprising a closing and opening outer box and an inner packing placed inside the outer box. The inner packing encloses a set of rod-like smoking products and an inner wrapping which covers this set. The inner wrapping comprises the first paper layer forming one inner wrapping surface, the second paper layer forming the other inner wrapping surface and a moisture-proof layer between the first and the second paper layers. The moisture-proof layer contains solid paraffin as a basic component and its thickness is enough to provide for the first and second paper layers to be glued together. Wrapping paper as well as the method and machine for its production are proposed.
EFFECT: increased moisture resistance, flavour keeping and improved biological decomposition.
20 cl, 9 dwg