Insulating paper, insulating material on its basis
(57) Abstract:The inventive insulating paper contains the polyaramid threads fibrid and a mixture of polyester fibers with different linear densities, respectively, 0.12 to 0.22 and 0.33 to 0.60 Tex. It can also optionally contain polyvinyl alcohol fiber. Insulating material is made of one or two layers of the above insulating paper and a layer of polyester film, which is connected via a connecting layer or layers of insulating paper. The binder contains a mixture of polyester and epoxy resin at a ratio 1 5 5 1. A binder may further comprise a curing agent, such as polyisocyanate. 2 S. and 3 C.p. f-crystals, 2 tab. The invention relates to electrical insulating paper and composite materials on the basis of the securities in combination with heat-resistant polymer films.Well-known and widely used in electrical engineering paper-based polyaramid threads  and polyester fibers 
Closest to the proposed paper to the technical essence is insulating paper containing the polyaramid threads fibrid and the fibrous component of the polyester fiber is a rather uniform structure, and high density and smoothness of the surface of this paper limits the possibility of its use in the manufacture of electrical insulating composite materials.Known insulating material based on electrical insulation paper is made of one or two layers of specified paper containing fibrous component of the polyester fibers, and a layer of polyester film, which is connected to a layer or layers of paper with a binder. As a binder used polyamide or polyimide resin  When a binder is applied on the insulating paper in two steps. First on the paper to cause the lacquer layer on the basis of polyimide, and then after drying the lacquer layer of a polyamide, then the paper again subjected to drying to calendering at a temperature of 190-210aboutC and a pressure of 6 kg/m2. After such processing, the paper is duplicated with a polyethylene terephthalate film at a temperature of 50aboutC and a speed of 6 m/min.The process of obtaining such material is very complicated technically and low productivity.The technical result of the invention is to improve the uniformity of the structure of the insulating paper, reducing the closeness and smoothness of its surface is at is achieved by in insulating paper containing the polyaramid threads fibrid and the fibrous component of the polyester fibers according to the invention, the fibrous component is made of two types of polyester fibers with different linear densities, respectively of 0.12 to 0.22 and 0.33 to 0.60 Tex in the following ratio, wt.h. Polyaramid threads fibrid 100 Polyester fiber with Li - nonlinear density of 0.12 - 0.22 Tex 20-300 Polyester fiber with Li - nonlinear density of 0.33 to 0.60 Tex 8-130
In this paper may further comprise polyvinyl alcohol fiber in the amount of 6.5 to 11.0 wt.h. on 100 wt.h. polyaramid threads of hibrido.Other technical result of the invention is to increase the adhesion strength of the insulating material, manufacturability and performance of the process of its manufacture.This technical result is achieved in that the insulating material on the basis of electrical insulation paper is made of one or two layers of specified paper containing fibrous component of the polyester fibers, and a layer of polyester film, which is connected to a layer or layers of paper using the binder according to the invention, the paper further comprises politest, respectively of 0.12 to 0.22 and 0.33-0.6 Tex in the following ratio of components, wt.h. Polyaramid threads fibrid 100 Polyester fiber with Li - nonlinear density of 0.12 - 0.22 Tex 20-300 Polyester fiber with Li - nonlinear density of 0.33 to 0.60 Tex 8-130, and as the binder material comprises a mixture of polyester and epoxy resin at a ratio of 1:5-5:1.In this paper may also contain polyvinyl alcohol fiber in the amount of 6.5 to 11.0 wt.h. on 100 wt.h. polyaramid threads of hibrido, binder and curing agent in the amount of 3-10 wt.h. on 100 wt.h. the binder.The use of this mixture of polyester fibers allows to obtain a stable fibrous suspension without lumps and flakes caused by crowding and skolachivaniya fibers in the dispersion process, which further allows to obtain a uniform structure of the paper.The specified ratio of these polyester (PE) fibers, polyaramid threads (PA) fibrid had an unexpected effect on the density of the surface during the heat treatment on the calenders in the direction of reduction (decrease in bulk density). In addition, during the heat treatment of this paper calenders on one side of the boom polymer fibers and output it to the surface of the paper (slight adhesion to the hot cylinder. This phenomenon leads to a decrease in the smoothness of the surface of one side of the paper.Introduction to composition (composition) paper addition of polyvinyl alcohol (PVA) fibers, perfectly wetted by water and swelling in it, contribute to the uniform distribution of polyester fibers, polyaramid threads of hibrido in suspension, which consequently improves the lumen of the paper and improves the uniformity of the structure of the sheet.Polyvinyl alcohol fiber, being highly polar polymer with a large number of hydroxyl groups in the process of drying paper and its heat treatment wets well (envelops) the surface of the hydrophobic polyester fibers, thereby creating, apparently, additional active centers in the paper, which had a positive effect on the adhesion strength of the insulating material.The use of the material layers of paper, having low density and smoothness of the surface containing polyvinyl alcohol fiber, and using as a binder a mixture of polyester and epoxy resins, capable of reacting with the active groups of the paper, allow to increase the adhesive strength of the material, to simplify the technology and improve performance on the essential fibres and with a linear density of 0.12-0.22 Tex and 0.33 to 0.60 Tex cutting length 4-6 mm was dispersed in water at a concentration of 0.4-1.0% and mixed with a suspension of the polyaramid threads fibrid, ground up to 48-52aboutSHR and add 90-110 DG.In the manufacture of paper with polyvinyl alcohol fiber is dispersed in water, a mixture of polyester m of polyvinyl alcohol fibers, and then mixed with a suspension of the polyaramid threads fibrid.From the resulting suspension is then cast the blade on the paper machine with an inclined grid at a concentration of 0.01-0.03% of the Dried paper web at a temperature of 70-100aboutC. the Paper is subjected to thermomechanical processing on the calenders at a temperature of 215-250aboutWith, mainly 230-240aboutand the pressure 96-144 bar at a speed of 20 m/min.P R I m e R 1. Polyester fibers of different density length 4-6 mm was dispersed in water at a concentration of 0.6% and mixed with a suspension of the polyaramid threads fibrid, milled to 50aboutSHR and weighted average fiber length 96 DG (experiments 1-5), as well as suspension of polyvinyl alcohol fibers (experiments 6-11).The resulting suspension is served on bombasine. Molded canvas paper and dried at a temperature of 70-100aboutC. Then, the paper is subjected to thermomechanical processing on the calenders at a temperature of 240aboutAnd pressure bar 96 at a speed of 20 m/min.The resulting paper is subjected to test. The results of the tests Pref is another prototype, has a lower density (lower bulk density) and surface smoothness while maintaining the mechanical and electrical properties.The resulting paper is processed into insulating material. In the manufacture of electrical insulating material as a binder a mixture of polyester and epoxy resin. This binder may further comprise a curing agent. As the polyester resin used complex polyester resin with a melting point 65-155aboutWith, for example, polyester resin-based dimethyl ether terephtalate acid and ethylene glycol or dimethyl ester of terephthalic acid, ethylene glycol and diethylene glycol.As the epoxy resin can be used epoxydodecane resin with an epoxy number of 8-22, for example, ED-8, ED-16, ED-20, ED-22, epoxiconazole resin, for example, UE-643.As a hardener may be used polyisocyanate, for example, the trimer-toluylenediisocyanate (Surisan BTP-D). Can be used as latent hardeners of the type, for example, a complex of boron TRIFLUORIDE.P R I m m e R 2. Insulating material was obtained as follows. Prepare a solution of the binder. For cericola and dissolved in formylglycine. After complete dissolution of the polyester in the solution add 50 g of epoxidations resin (mark ED-20) and stirred the mixture until a homogeneous solution. The resulting binder solution is applied on one or both sides of a polyethylene terephthalate film of a thickness of 125 mm and passed through a drying chamber impregnation-coating machine with a speed of 25 m/min at a temperature of 120-130aboutWith removal of the solvent. Then lacquered side of the film put the paper obtained in example 1 and experiment 1 and with the same speed at the same temperature pripressovyvajut on a roller press (calender) at a pressure of 5 kg/cm2. Get composite material unilateral: PET film + paper (experiments 15-16) or bilateral: paper + film + paper (experiment 17).P R I m e R 3. Insulating material was obtained analogously to example 2, the difference lies in the fact that the paper used in example 1, experiments 6, 10, as a binder use polyester resin on the basis of dimethyl terephthalate and ethylene glycol and epoxy resin grade ED-22 at a ratio of 1:1.P R I m e R 4. Insulating material was obtained analogously to example 2. The difference is that the paper used in example 1, OPIE epoxy resin grade ED-16 at a ratio of 1:5.P R I m e R 5. Insulating material was obtained analogously to example 2, the difference is that in the binder solution after complete dissolution of the polyester and epoxy resin, is injected hardener Surisan BTP-D in an amount of 5 wt.h. on 100 wt.h. the binder.The performance of the obtained materials are given in table.2. It contains the test results of material for the prototype (example 6).As can be seen from the data given in table.2, the proposed material has a higher adhesive strength, while maintaining electrical and mechanical properties.In addition, in the manufacture of the material used not impregnated paper (excludes pre 2-step impregnation of paper and composite insulating material was obtained in one pass instead of two passes when the goods are received prototype) at a speed of 25 m/min (instead of 6 m/min in the manufacture of the material of the prototype). That is, the proposed increases and the performance of its manufacture.Thus, the present invention provides the achievement of the technical result and to meet the requirement of industrial applicability, as feasible on Galatina paper, containing the polyaramid threads fibrid and polyester fiber, characterized in that it comprises a mixture of polyester fibers with different linear densities, respectively 0.12 to 0.22 and 0.33 to 0.60 Tex, in the following ratio, wt.h.Polyaramid threads fibrid 100
Polyester fiber with a linear density of 0.12 to 0.22 Tex 20 300
Polyester fiber with a linear density of 0.33 to 0.60 Tex 8 130
2. The paper by p. 1, characterized in that it further comprises a polyvinyl alcohol fiber in the amount of 6.5 to 11.0 wt.h.3. Insulating material made of one or two layers of insulating paper containing polyester fibers, and a layer of polyester film, which is connected via a connecting layer or layers of insulating paper, characterized in that the insulating paper further comprises the polyaramid threads fibrid, while it contains a mixture of polyester fibers with different linear densities, respectively 0.12 to 0.22 and 0.33 to 0.60 Tex, in the following ratio, wt. hPolyaramid threads fibrid 100
Polyester fiber with a linear density of 0.12 to 0.22 Tex 20 300
Polyester fiber with a linear density of 0.33 to 0.60 t the AI from 1:5 to 5:1.4. The material on p. 3, wherein the binder additionally contains a curing agent such as polyisocyanate, in the amount of 3 to 10 wt.h. on 100 wt.h. the binder.5. The material on p. 3, wherein the paper further comprises a polyvinyl alcohol fiber in the amount of 6.5 to 11.0 wt.h.
FIELD: pulp and paper industry.
SUBSTANCE: the invention is dealt with a pulp and paper industry. The paper or cardboard laminate contains at least one forming volume layer called as a volumetric layer, consisting by 40-98 % from cellulose fibers with a milling degree equal to 550-950 ml according to the Canadian standard device, and at least one secondary layer located at least on one side of the volumetric layer and having a higher density, as compared with the volumetric layer. The secondary layer and the basic layer are fused to each other in essence by all their opposite surfaces, and the laminate has a factor of rigidity at bending exceeding 2.5 Nm7/kg3, but less than 14 Nm7/kg3, calculated as a geometric average value for a longitudinal direction and a transverse direction. According to the invention, between the volumetric layer and the secondary layer there is a thin intermediate layer, which has the bigger value of resistance to removal of water, than the volumetric layer, and the basic weight at least of 2 g/m2 but less than 20 g/m2 and which is formed together with the volumetric layer. The invention also offers a method of production of paper or cardboard laminate and ensures achievement of a high strength at the low share of a binder, and also prevention of wrinkles.
EFFECT: the invention ensures achievement of a high strength of the laminate at the low content of a binder and prevention of wrinkles.
27 cl, 17 dwg, 6 tbl, 3 ex
FIELD: mechanical working or deformation of paper or cardboard.
SUBSTANCE: method comprises making cardboard product that has at least two layers and gluing the cloths of raw cardboard material which define the layers of the product. At least on of the cloths is worked mechanically in dry condition, preferably no more than 12% of humidity, by means of extruding a relief pattern on it in order to deform the surface of the cloth uniformly. The cloths are glued to each other.
EFFECT: enhanced efficiency.
14 cl, 1 dwg
SUBSTANCE: pre-impregnate is manufactured by impregnation of crude paper with thermosetting formaldehyde-free resin until content thereof 10 to 70%. Residual moisture content in pre-impregnate is 2-3%. Resin contains: at least one radical-polymerization polymer with less than 5% of α,β-ethylenically unsaturated mono- or dicarboxylic acid; at least one radical-polymerization polymer containing more than 5% of α,β-ethylenically unsaturated mono- or dicarboxylic acid; and at least one alkanolamine with at least two hydroxyl groups; or resin contains at least one radical-polymerization polymer with 5-100%, particularly 5-50%, or more particularly 10-40% of α,β-ethylenically unsaturated mono- or dicarboxylic acid and at least one above alkanolamine.
EFFECT: improved quality of surface, printing properties, delamination resistance, and varnishing capacity.
16 cl, 3 dwg, 2 tbl, 2 ex
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: 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: construction materials industry; production of the moldable decorative laminated material.
SUBSTANCE: the invention is pertaining to the moldable complicated decorative laminated material, which contains the polymer impregnated decorative layer made out of the bilateral expansible decorative paper and the core polymer impregnated layer formed out of the bilateral extendable kraft-paper. The laminated material is used for production of the different products requiring the molding concerning the surface of the complicated form, in particular, to the packet made out of the laminated material. The board made out of the laminated material has the moldable base in addition to the decorative layer. The method of manufacture of the moldable decorative laminated material includes the following operations: treatment of the decorating paper, its impregnation, the treatment and impregnation of the kraft-paper, the layer by layer stacking and joining of the layers of the decorative and kraft-paper under pressure with their preliminary impregnation with the phenol-formaldehyde polymeric compound. The technical result of the invention is improvement of the surface properties of the decorative laminated material.
EFFECT: the invention ensures improvement of the surface properties of the decorative laminated material.
37 cl, 8 dwg
FIELD: construction materials industry; other industries; production of the plates produced by the direct lamination.
SUBSTANCE: the invention presents the plate of the direct lamination. The purpose of the invention is creation of the plate of the direct lamination, so that in it the graphics image of the relief shall correspond to the relief reconstruction of its surface. At that it is possible to use the hot pressure moderate for the decorative layer. The plate is manufactured by the method of the hot pressing of the core with the resin-saturated absorbing layers including the surface with one decorative layer containing the graphics image of the surface of the imitated material. The plate also contains the deposited on the decorative layer transparent covering layer with the relief reconstitution of the surface structure of the imitated material. Between the decorative layer and the core there is the intermediate resin-containing layer made in the form of the prefabricated separate adhesive layer with the saturating resin. The given version has the technological advantages at manufacture of the plates of the big dimensions, and also allows to manufacture the plates having the structured surfaces, at that the structure precisely coincides with the graphics image of the below located decorative layer.
EFFECT: the invention ensures creation of the plate of the direct lamination, which graphics image of the relief precisely corresponds to the relief reconstruction of its surface and the given version has the technological advantages at manufacture of the plates of the big dimensions.
3 cl, 2 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: packages, particularly wrappers.
SUBSTANCE: wrapping material comprises laminate including at least one flat paper layer and at least one additional corrugated paper layer with wave amplitude defined in direction transversal to additional paper layer movement. The flat and corrugated paper layers are connected with each other by means of adhesive. Additional paper layer also includes substantially parallel wave system with amplitude defined in additional paper layer movement plane.
EFFECT: increased rigidity without material weight increase, improved voluminosity and wear resistance, enhanced printability.
5 cl, 2 dwg
FIELD: textiles; paper.
SUBSTANCE: sheet consists of first and second plaits made from cellulose wool with specific weight of 10 to 40 g/m2, imprinted and gathered together in such a way that, projections (100', 200'), forming the imprinted pattern are directed inside the sheet and form grooves in between them. In this case, the first plait (F1) consists of the first projections (100') in the form of a truncated cone, with a round or oval cross section, surface area, crests of which are between 0.3 and 4 mm. The second plait (F2) consists of second projections (200') in the form of a truncated cone, located opposite the first projections (100') in such a way that, the first projections (100') cannot be located between the second projections (200').
EFFECT: increased softness of the sheet.
13 cl, 8 dwg
FIELD: paper-and-pulp industry.
SUBSTANCE: invention provides aqueous dispersion, method of preparing it, use of dispersion, and a paper manufacturing process comprising internal sizing and surface sizing of paper. Aqueous dispersion contains at least one cellulose-reactive sizing agent selected from group consisting of ketene dimers and multimers, at least one cellulose-unreactive sizing agent, and at least one emulsifier selected from group consisting of oxyalkylene phosphate and sulfate esters and their salts. Dispersion preparation method comprises joining together sizing agents with at least one emulsifier in presence of water to form mixture, which is then homogenized to form aqueous dispersion. Paper manufacturing process comprises forming paper sheet from pulp containing cellulose fibers and depositing said aqueous dispersion thereon. Paper manufacturing process also comprises adding said aqueous dispersion to pulp containing cellulose fibers and dehydrating pulp on screen to produce paper.
EFFECT: increased stability of dispersion and efficiency of outside and internal sizing.
18 cl, 4 tbl, 4 ex
SUBSTANCE: aqueous dispersion contains A) 0.05-10 wt % salts of perfluoropolyester derivatives of dicarboxylic acids of formula T-O-Rt-T, where T = -CF2-COOZ or -CF2CF2-COOZ, Z - Na, K, NH4, R1(R2)(R3)N, R1=R2=alkyl or hydroxyalkyl, R3 = H, alkyl or hydroxyalkyl, Rf denotes (per)fluoropolyoxyalkylene chain with number-average molecular weight of 500-10000, and B) 0.01-5 wt % water-dispersible or water-soluble cationogenic polymers with charge density in dry polymer greater than 1 mEq/g. The dispersion is obtained by dispersing 0.05-10 wt % component (A) in water. Cationogenic polymer (B) is slowly added to the obtained dispersion while stirring until achieving weight ratio of (A) to (B) of 1:1-5:1.
EFFECT: dispersions which endow paper with improved oil-repellent properties against compounds with high content of fat or fatty acids.
14 cl, 16 tbl, 17 ex
FIELD: textile, paper.
SUBSTANCE: method consists in addition of aqueous solution of binding agent, having concentration from 0.03 to 0.4 wt %, into suspension of cellulose material; and addition of mixed suspension of cellulose into header, and suspension contains suspension of cellulose material and aqueous solution of binding agent. Besides, addition of aqueous solution of binding agent is done between discharge box and meshy filter arranged in close proximity to discharge box. Installation comprises the following components: meshy filter to remove admixtures from suspension of cellulose material and device to add binding agent to supply aqueous solution of binding agent, having concentration from 0.03 to 0.4%, into pipe, which connects meshy filter and discharge box.
EFFECT: invention provides for the possibility to make well-formed paper even when using high-speed paper-making machines.
4 cl, 3 dwg
SUBSTANCE: water-soluble composition contains a) at least one water-soluble optical bleaching agent, b) a polymer obtained from an ethylenically unsaturated monomer or a monomer mixture, characterised by that at least one monomer is an acrylamide and the water-soluble polymer has average (weight-average) molecular weight between 500 and 49000, optionally c) polyethylene glycol with weight-average molecular weight between 500 and 6000, and d) water. Said composition is used to optically bleach paper.
EFFECT: high degree of bleaching while preserving rheological properties.
7 cl, 7 tbl, 70 ex
FIELD: pulp and paper industry.
SUBSTANCE: invention relates to means for dehydration of cellulose. Disclosed is a composition of dehydration means, containing polyorganosiloxanes functionalised with side polyethers and/or aliphatic hydrocarbons, having presented structures. Also disclosed is a method of producing said composition and method for increasing dehydration rate and filtering in procedures for washing and disinfection of cellulose.
EFFECT: use of disclosed composition for dehydration significantly speeds up dehydration and improves filtration of fibrous mass when processing cellulose.
18 cl, 1 tbl, 8 ex