A method of making sandwich structures
(57) Abstract:Usage: the technology of layered materials for insulation against heat, sound or mechanical and mainly used in construction, as well as in the clothing industry. The method is carried out by drawing from two opposite sides of the strip of blanks 1 filler adhesive strips 2, having them two on each workpiece along its longitudinal edges and taking the width a of each of the workpiece is equal to the sum of the thickness H of the filler in a three-layer design and twice the width b of the adhesive strips. Strip the workpiece 1 is placed between the two casings 3 and 4 are parallel to one another in increments of t, no less width b of the glue strip 2, with the adhesive strip in a checkerboard pattern in the plane of the cross-section of the package. The workpiece 1 is connected with the casings 3 and 4 in places glue strips 2, and then diluted casing by longitudinal displacement one relative to the other in the direction perpendicular to the adhesive strips by moving the top of each workpiece toward one another (Fig. 1), and taking the time shift value B equal to the width a of the workpiece 1, is reduced by the thickness and twice the width b of the glue is to the technology of three-layer structures, designed for insulation against heat, sound or mechanical effects and used as building panels, as well as laminated materials for the garment industry.A known method of making sandwich structures, including the application of parallel adhesive strips on the inner surface coverings in places suspected peaks of the corrugation filler with a step equal to the desired step of the corrugation filler, adhesive bonding coverings placed between sheet preparation, dilution plating at a distance equal to the desired thickness of the filler, while giving the sheet blank corrugated shape due to its extraction and subsequent fixation of the received forms .A three-layer structure obtained in a known manner, satisfactory strength of the connection of the filler with coverings have low resistance to compression due to the inclined arrangement of the lateral sides of the corrugation relative to the casing, and increasing the resistance to compression of the filler is impossible without increasing its mass. The known method is also characterized by high technological complexity.Closest to the invention it is the Oron sheet filler, laying on the placeholder parallel adhesive strips one-sided folds and laying placeholder in the package between the two casings with the location of the adhesive strips on the outside of the folds in a checkerboard pattern in the plane of the cross-section of the package, the adhesive bonding of the filler with coverings, breeding casing by longitudinal displacement one relative to the other in the direction perpendicular to the adhesive strips, and the fixation of the form filler .The known method provides sufficient bonding strength of the filler with casings, however, not possible to obtain a three-layer structure having a high resistance to compression while reducing mass, as increasing resistance to compression of the aggregate of such structures is possible only by reducing the corrugation step, i.e., increasing the frequency of the corrugation along the length of the filler, which is accompanied by an increase in its mass. In addition, the known method is characterized by increased complexity of technology due to the need of laying on the sheet blank placeholder folds before connecting with coverings.The aim of the invention is to increase the compression resistance and low weight requirements which I am coverings.This objective is achieved in that according to the method of making sandwich structures, including the application of adhesive strips on opposite sides of the filler, packing filler into the package between the two casings with the location of the adhesive strips in a staggered manner in the plane of the cross-section of the package, the adhesive bonding of the filler with coverings, breeding casing by longitudinal displacement one relative to the other in the direction perpendicular to the adhesive strips, and fixation, the filler is carried out in a separate strip of blanks of a width equal to the sum of the thickness of the filler in a three-layer structure and a double-wide adhesive strips, who put two on each workpiece along its longitudinal edges of the workpiece are placed parallel to one another with a spacing not smaller width of the adhesive strip, and the displacement of the casings performed by moving the top of each workpiece toward one another and taking the offset is equal to the width of the workpiece is reduced in its thickness and twice the width of the adhesive strip.Declare a set of distinctive features is the implementation of the filler in the form of a separate strip of blanks of a width equal to the sum of t the two on each workpiece along its longitudinal edges, stacking workpieces parallel to one another with a spacing not smaller width of the adhesive strip, the execution of the displacement plating, moving the edge of each workpiece toward one another and taking the offset is equal to the width of the workpiece is reduced in its thickness and twice the width of the adhesive strip.Run a strip of blanks aggregate width equal to the sum of the thickness of the filler in a three-layer structure and a double-wide adhesive strips, put two on each workpiece along its longitudinal edges, stacking workpieces parallel to one another with a spacing not smaller width of the adhesive strip, and performing a displacement plating, moving the edge of each workpiece toward one another and taking the offset is equal to the width of the workpiece is reduced in its thickness and twice the width of the adhesive strip, allows to obtain a three-layer structure with the filler, in the form of walls, perpendicular to the casings, while enabling the desired increase of the spacing of the partitions. This makes it possible to increase the compression resistance of sandwich structures while reducing their weight. The proposed signs provide the application of sufficiently large castrucci by eliminating the necessity of laying down the folds on the blanks.These advantages allow the use of the invention in products with higher requirements to the three-layer structures, such as lightweight insulating panels, experiencing the high voltage and intended for insulation against heat, sound or mechanical effects, as well as multi-layer bags for garment industry.In Fig. 1 shows a strip billet filler, United with casings; Fig. 2 - the same, with divorced coverings.The method is as follows.From two opposite sides of the strip of blanks 1 aggregate thickness of applied adhesive strip 2 width b, having them two on each workpiece along its longitudinal edges (Fig. 1). Thus the width of each strip of the workpiece is equal to
a= N+ 2b, (1) where N is the required thickness of the filler in a three-layer structure (Fig. 2).Strip the workpiece 1 is placed between the two casings 3 and 4 are parallel to one another in increments of t, no less width b of the glue strip 2, with the adhesive strip in a checkerboard pattern in the plane of the cross-section of the package (Fig. 1). The workpiece 1 is connected with the casings 3 and 4 by hot pressing in masteralloy, perpendicular to the adhesive strips by moving the top of each workpiece toward one another (Fig. 1) and taking the amount of displacement (Fig. 2) is equal to
In=a - 2b. (2)
The result is a bending of the strip of blanks in areas adjacent to the adhesive strips, and under the action occurring in the blanks elastic forces plating divorce in the transverse direction (Fig. 2). This billet form perpendicular to the casings 3 and 4 partitions 5 height H equal to the desired thickness of the filler located on the step t. The obtained three-layer structure is subjected to normal for used material handling for fixing the shape of the fill.As the strip of blanks filler sandwich structures using a wide range of flexible sheet materials, such as fabric and knitted fabrics of various fibrous composition, in particular, on the basis of optical fibers, and nonwoven and film materials, flexible cellular plastics. A covering made of a lightweight plastic sheets, and flexible sheet materials, for example, knitted fabrics, non-woven film and paintings. For applying adhesive strips applied various adhesive materials depending on Mau press equipment or calenders. Fixing the form sandwich structures can be carried out by impregnation of the binder with its subsequent hardening by heat treatment. When used as blanks of thermoplastic materials (e.g., fabrics made of synthetic fibers, film, paintings, cellular plastics) fixation can be carried out thermally by transferring the material in a highly elastic state, followed by the transition when cooled.The proposed three-layer structure can be obtained in the form of separate panels contour or continuous manner in the form of laminated canvas.P R I m m e R. Fabricate three-layer design that is used as insulation panels. From two opposite sides of the strip of blanks of flexible polyurethane foam width a=25 mm and thickness =4 mm is applied strip of adhesive polyamide coating width b=5 mm, having them two on each workpiece along its longitudinal edges. The workpiece is placed between the two casings of the fabric with a polymer coating in parallel to each other with a step of t=30 mm, with adhesive strips in a staggered manner in the plane of the cross-section of the package, and combined with coverings of grief is sustained fashion in another direction, perpendicular to the adhesive strips by moving the top of each workpiece toward one another and taking the amount of displacement In=11 mm, after which a three-layer structure is subjected to heating to 180aboutWith subsequent cooling at 20aboutFor fixation of the form filler. The result is a three-layer construction with an aggregate thickness of H=15 mm, made in the form of perpendicular walls with step t=30 mmThe obtained three-layer structure has a higher compressive strength in comparison with the prototype, with the same geometrical parameters N, t, b, and , because of its partition placeholder perpendicular to the casing in opposed walls of the prototype, located to the casing at an angle 56about. The mass of the filler obtained three-layer structure is lower in comparison with the prototype by 46% . The strength of the connection of the filler with the covers preserved at the level of the prototype, since the parameters t and b (i.e., the step width of the adhesive joints) in the two structures have the same values. In addition, obtaining a three-layer structure of this example is characterized by a significantly lower complexity and the complexity of the technology, because it does not require OPE the th and strip blanks, the width b of the adhesive strips and the thickness H of the filler is unacceptable because it leads to the impossibility of obtaining a three-layer structures with the required thickness H of the filler. It is also unacceptable violation of the relation (2) between the amount of displacement of the casings, the width and thickness of the workpieces and the width b of the adhesive strips, as this leads to the formation of the partitions, not perpendicular to the casings. The violation of the relation between step t stacking of workpieces and the width b of the adhesive strips (tb) is technologically impossible.The invention improves the quality and reliability of the three-layered insulating structures, reducing their weight and material consumption, as well as reducing the cost and complexity of manufacturing. The method does not require the use of complex equipment, it is easy mechanization and automation, creates prerequisites for processing a strip of waste sheet materials. A METHOD of MAKING SANDWICH STRUCTURES, including the application of adhesive strips on opposite sides of the filler, packing filler into the package between the two casings with the location of the adhesive strips in a staggered manner in the plane of the cross-section of the package, the adhesive connection, fill in the, erpendicular adhesive strips, and fixation, characterized in that as aggregate use strip harvesting width equal to the sum of the thickness of the filler in a three-layer structure and a double-wide adhesive strips that are two on each workpiece along its longitudinal edges of the workpiece are placed parallel to one another with a spacing not smaller width of the adhesive strip, and the displacement of the casings performed by moving the top of each workpiece toward one another and taking the offset is equal to the width of the workpiece is reduced in its thickness and twice the width of the adhesive strip.
FIELD: fire-resistant materials.
SUBSTANCE: invention relates to fabricating fire-resistant material suitable to make filter-type individual respiratory defense systems. Material contains base in the form of cloth with, applied on one of its sides, discrete fire-retardant emulsion polyvinylchloride-based coating. Material additionally contains similar coating applied on its other side and, situated on its opposite sides, facing cotton/ester textile layer and reverse cotton textile layer. Base cloth consists of carbon-containing material.
EFFECT: enhanced fire-resistant and heat-resistant properties with high air permeability and thereby defense against poisons preserved.
1 dwg, 1 tbl
FIELD: fire-resistant materials.
SUBSTANCE: invention relates to fabricating fire-resistant material suitable to make filter-type individual respiratory defense systems. Material contains textile sheet with, applied thereon, emulsion polyvinylchloride-based fire-retardant composition in the form of discrete layer. Material additionally has, on its reverse side, (i) a sorption layer constituted mainly by carbon-containing material with, applied on its both sides or on the side being in front of facing layer, discrete coating based on polyvinylchloride containing fire retardants, and (ii) reverse layer containing woven or unwoven material made from cotton, viscose, synthetic fibers or mixtures thereof.
EFFECT: acquired high fire-resistant and heat-resistant properties with high air permeability and thereby defense against poisons preserved.
2 cl, 2 dwg, 1 tbl, 2 ex
FIELD: laminated fire-proof materials.
SUBSTANCE: method involves applying fire-retarding material on tissue web to create the first discrete layer, wherein the fire-retarding material is based on emulsified polyvinylchloride; placing the second tissue web on the first one; covering the second tissue web with the same fire-retarding material to form the second discrete layer; arranging the third tissue web on the second one and simultaneously hardening the first and the second discrete layers.
EFFECT: increased thermal protection, fire-resistance, improved protection against poisonous agents and increased labor productivity.
FIELD: chemical industry; other industries; methods and the heads for production of the laminate with the lengthwise-transversal orientation of the layers made out of the oriented films.
SUBSTANCE: the invention presents the laminate with the lengthwise-transversal orientation of the layers formed out of the films, from which at least two of them have mono-axial or unbalanced two-axial orientation, in which the main direction of the orientation in one of these films intersects the main direction of the orientation in other film and have the modifications of the surface properties executed in the certain tracery of these two films on those their surfaces, which are disposed inside the laminate and are connected with each other. The surface layers of the films located inside contain the set of filaments made out of the material produced by the joint extrusion, and are located so, that these two sets on two films intersect each other. The filaments may by used for control over the adhesion between the films and for reduction of the trend to delamination at the multiple bending. It allows to use the laminate in the capacity of the canvas cloth. In the combination with creation of the relief at least on one film, the main layer of which is made transparent for formation of the strips. At that the colored filaments attach the attractive visual effects to the laminate. The visual effect makes the laminate to look more heavy-gage.
EFFECT: the invention ensures, that the filaments used in the laminate may by used for control over the adhesion between the films, for reduction of the trend to delamination at the multiple bending allowing to use the laminate as the canvas cloth and the colored filaments attach the attractive visual effects to the laminate.
58 cl, 7 dwg, 3 ex
FIELD: aircraft industry.
SUBSTANCE: layered panel comprises at least two interconnected stacks of metallic layers and plastic layers reinforced with fibers. The stacks have intermediate section `at which at least one of the internal layers is discontinuous. All other layers including outer metallic layers are continuous. Within the material, one stack of layered composition is smoothly goes into the other without onset of stress concentration.
EFFECT: enhanced strength.
14 cl, 7 dwg
SUBSTANCE: there is disclosed three-dimensional apertured film containing the first plane surface in the first default plane, the second plane surface in the second default plane and a set of apertures passing between the first and second surfaces. The three-dimensional apertured film also comprises at least one element that overlaps each set of apertures to form thereby a set of smaller apertures. The element overlapping each aperture has an upper face arranged below the first default plane.
EFFECT: three-dimensional apertured film has improved properties in processing the fluid when used in disposable absorbing products.
57 cl, 11 dwg, 1 tbl
FIELD: technological processes.
SUBSTANCE: invention relates to a method of forming a multilayer elastomeric laminate for clothes and a hygienic product, to a multilayer elastomeric laminate and an article made therefrom. The method involves the following: a) laminating an elastomeric film onto a first substrate to form a laminate web having an elastomeric film surface, where the elastomeric film contains an elastomeric polymer selected from a group consisting of block copolymers of vinyl arylene and conjugated diene monomers, natural rubber, polyurethane rubber, polyester rubber, elastomeric polyolefins, elastomeric polyamides and mixtures thereof, and the first substrate is made from a polymer film, non-woven fabric, a paper article, woven fabric, knitted fabric, scrim, netting or a combination thereof; b) slitting the laminate web to form laminate strips; and c) bonding the surface of the elastomeric film of at least one laminate strip with a second substrate having a width greater than the width of the laminate strip to form a multilayer elastomeric laminate, where the second substrate is made from a polymer film, non-woven fabric, a paper article, woven fabric, knitted fabric, scrim, netting or a combination thereof.
EFFECT: efficient manufacturing of an elastomeric film having good elastomeric properties and good-looking surface structure after activation, which can be rolled and stored without monitoring.
20 cl, 6 dwg
SUBSTANCE: invention relates to a perforated film, a method of producing a perforated film for packaging, storage container made from said film and method of filling the storage container with powdered material. The perforated film has at least one layer made from a composition which contains at least one thermoplastic polymer, where at least one layer has perforations whose dimensions are less than or equal to 90 micrometres (mcm), and the ratio of the total perforated area to the total area of the surface of the film is between 400000 and 2000000 square micrometres per square inch of the film ((mcm)2/(inch)2) (62000 - 310000 ((mcm)2/(cm)2).
EFFECT: obtaining storage container made from said perforated film, having a combination of perforation dimensions and density of perforations, which enables efficient removal of air when filling the container with fine powder substances under pressure.
51 cl, 3 tbl, 5 dwg
SUBSTANCE: invention relates to the technology of obtaining elastomeric materials and particularly to processing surfaces of elastomer films in order to prevent creating in a roll. The method involves forming a film layer from an elastomeric polymer from a block-copolymer of vinyl arylene and conjugated diene monomers, which can be stretched by at least 150% of the initial size and then shrink to not more than 120% of the initial size. An anti-crease coating layer is applied on the first surface of the film. The coating consists of a solvent and an anti-crease coating component selected from lacquer and a surfactant. The film is rolled into a roll, the anti-crease coating component being in contact with the second surface of the film.
EFFECT: efficient method of processing surfaces of elastomer films to prevent creasing in a roll.
18 cl, 5 dwg, 2 ex
FIELD: process engineering.
SUBSTANCE: this invention relates to non-sticking multilayer elastomer film and to method of its production. Proposed film comprises first fragile polymer film layer that may not expand to over 110% of its initial size without breakage or cracking, and second elastomer layer. Said first layer is bonded with first surface of said second elastomer layer. First layer represents polystyrene while second layer is selected from the group comprising block-copolymer of styrene and elastomer of polyolefin. Multilayer may be activated by breaking first fragile polymer layer and imparting elastoplasticity to multilayer film. Film layer that may expand to approx. 150% of its initial size and recover after expansion to not over 120% of its initial size. Proposed method comprises producing non-sticking multilayer film layer and activating non-sticking multilayer film with destruction of fragile polymer film layer along with imparting elastoplasticity to multilayer film.
EFFECT: possibility to roll elastomer film and store without its sticking.
19 cl, 8 dwg, 2 ex
FIELD: aircraft industry; production of different partitions used for airplane cabins inner lining.
SUBSTANCE: the invention is dealt with aircraft industry, in particular, with production of different partitions used for airplane cabins inner lining. The cellular panel represents a material with the layers of the upper and lower layers of lining and the filler. The upper and bottom layers of lining are made out of material named Organit 7ТЛ-Б(0)-2-Ш. The filler is manufactures out of a high heat-resistant paper Phenylon БФСК, between them there is an adhesive film ВК-46. The butts of the cellular panel are filled with a paste ВПЗ-1-55 to prevent penetration of moisture into the filler. The given design of the cellular panel ensures an increase of a pressure density of the panel and a number of points to fix the fittings and the fastening elements on the panel perimeter.
EFFECT: the design of the cellular panel ensures an increase of a pressure density of the panel and a number of points to fix the fittings and the fastening elements.
2 dwg, 2 tbl
FIELD: building elements of relatively thin form for the construction of parts of buildings, for instance sheet materials, slabs, or panels.
SUBSTANCE: production method for honeycomb panel used for building finishing from inside and outside during construction involves cutting stainless steel sheets into separate plates; arranging solder sheets covered with fluxing agent from both sides thereof on stainless steel plate surfaces; installing one plate at press top; installing another plate at press bottom; locating filler made as stainless steel honeycomb structure between solder sheets; heating the assembly within temperature range of 200-300°C along with soldering thereof. Press with internal heaters is used to produce above panel. Plates and honeycomb structure are formed of the same stainless steel.
EFFECT: prevention of heat panel deformation, possibility to obtain decorative panels having improved appearance and smoothness, increased panel strength and corrosion resistance.
5 dwg, 1 ex
FIELD: building members, particularly heat-insulated building unit used as filler structures, facings and building structures.
SUBSTANCE: heat-insulated building member comprises outer layers, metal foil screen layers, cellular packing layers made of bent paper strips and adhered one to another. Cells of one packing layer are displaced with respect to that of another packing layer. Outer layers are made of metal foil and are used as screens and load-bearing layers. Cellular packing layers are connected with each other by means of flat paper sheets. Planes of adjacent packing layer connection areas are turned one relative another through angle equal or less than 90°. Packing layer thickness, namely cell height, and cell dimensions are reduced towards outer layers. Flat paper sheet thickness increases towards outer layers. Packing layer cells adjoining outer load-bearing layer facing heat-dissipation surface are filled with foaming composition. The foaming composition includes components, which sublimate under the action of high temperature with water vapor or carbonic oxide gas emission. Adjacent packing layers adjoining opposite outer load-bearing layers are filled with ecologically-safe cotton wool. Ratio between flat paper sheets and packing layer thickness (cell height) is 1:1 - 1:250. Ratio between cell height and cell face dimensions is 1:2-1:5. Ratio between bent paper strip thickness used for cell production and packing layer thickness (cell height) is 1:50-1:300. Ratio between mean packing layer thickness (mean 9-th cell height) and heat-insulation layer thickness is 1:2-1:60.
EFFECT: increased load-bearing capacity, strength and fire-resistance along with retention of good heat-insulation properties.
5 cl, 2 dwg
SUBSTANCE: assembly construction element in the form of beam, comprising shelf and two walls, differs by the fact that shelf has one wall at each of its two longitudinal sides, besides each wall is attached to one longitudinal side wall of shelf preferably with the help of adhesive substance, and by the fact that end zones of shelf inverted from shelf are flatly connected to each other by surfaces facing each other, preferably with the help of adhesive substance, besides walls in their cross sections have shape of "extended S".
EFFECT: development of efficient construction element in the form of beam.
25 cl, 16 dwg
SUBSTANCE: invention relates to construction, specifically to a method for construction of energy-efficient, environmentally safe structures. Task is solved by construction of energy-efficient, environmentally safe structures of prefabricated structures in form of modular assembly elements, through which structures are mounted on a base, prefabricated panels are used to build wall structures, floors, covers and attached to each other, and modular prefabricated elements are made from light steel components and panel sheet, frame structure of light steel components is made of C-shaped profile and on each modular collecting element sheet material is fixed on both sides, with symmetric shift outward by no more than ½ width of C-shaped profile.
EFFECT: technical task of present invention is a method for construction of an environmentally friendly structure, which would allow reducing range of manufactured and components, create a unified modular elements, due to application of which reduce consumption of sheet material wastes and increases labour efficiency, specifically creating unified modular elements for walls, floors, covers, roof, from which would be possible construction of different buildings and structures, both low-rise and high-rise residential and industrial buildings.
5 cl, 9 dwg