RU2156337C2 - Insulating material and method of its production - Google Patents

Abstract

FIELD: insulating materials and methods of their production; applicable in manufacture of building members. SUBSTANCE: insulating material is based on cellulose wool and has binding agent joined by means of adhesive with cellulose wool. Binding agent is used in form of viscose rayon fiber, and adhesive is used in form of material based on cellulose. Viscose rayon fiber is used in form of yarn or net. EFFECT: improved quality of insulating material, simplified production process. 18 cl, 7 dwg

Description

 The present invention relates to an insulating material comprising cellulose wool base material and a bonding agent bonded with cellulose wool adhesive.

 The invention also relates to a method for manufacturing an insulating material, in which the base material is formed from cellulose wool, and a bonding agent to which cellulose wool is bonded with an adhesive, which is also included in the method, is also used to make the insulating material.

State of the art
Known insulating material that uses cellulose wool, and a method for its manufacture include spraying water in cellulose wool in the manufacture of building elements, such as wall blocks. A significant problem is that over time the insulation material settles, and thus the insulation material does not provide sufficient insulation properties. The insulation material will also settle during storage and transportation, as well as at the actual installation site. Another disadvantage of the known solutions is the need for a long drying time due to the use of water, which necessitates the presence of drying chambers or other rooms. The building element with internal insulation must be removed from the production line to another place for drying during the time until the water dries. Insulation material made at the installation site also requires time for drying due to the use of water. Obviously, when using the known method, there are difficulties in production and, accordingly, significant economic losses. Patent applications DK 169 184, FI 912537 and WO 93/04239 describe cellulose-based insulating elements, but, according to the applicants, the insulating materials, their properties and methods for their production are not efficient and practical enough, since the heat and the moisture transfer of the binding agent and adhesive is not the same as that of the base material. In known solutions, the insulating material is not distributed evenly enough.

 Insulating material is also known, including cellulose wool as a base and a bonding agent bonded with cellulose wool adhesive (see international publication WO 88/04347, E 04 C 2/16 of 06/16/08). A method for manufacturing this material is also described there, which includes forming a base from cellulose wool and bonding cellulose wool to a binding agent using an adhesive. However, these material and method are also not free from the above disadvantages.

 In addition to cellulose wool products, mineral wool and glass wool insulation materials are also known that can also cause bacterial problems.

SUMMARY OF THE INVENTION
The objective of the invention is to create a new insulating material and method for its manufacture while eliminating problems related to known solutions.

 This problem was solved by creating an insulating material according to the present invention, characterized in that in the manufacture of the insulating material, viscose fiber is used as a bonding agent, and in that an adhesive material based on cellulose is used as an adhesive.

 The insulation material and the manufacturing method proposed according to the invention are based on the idea that the structure of the cellulose wool is made rigid using a bonding agent that adheres to the cellulose wool using an adhesive. Thus, the bonding agent and the adhesive form a kind of wicker support structure in the insulating material, and thus the insulating material does not settle. Another main idea is that all the materials used are environmentally friendly natural materials, so that together with the main material from cellulose wool, viscose fibers, which are also cellulose-based materials, are used as a bonding agent, and based on substances cellulose, for example viscose glue. It is not necessary to use a separate bonding agent and adhesive, but the bonding agent and adhesive can also be integral when using viscose glue, which forms fibers that serve as a bonding agent or supporting structure.

 The insulating material and the manufacturing method thereof according to the invention provide several advantages. The insulating material and the method provide a new solution, environmentally friendly, on a wood basis, i.e. practically based on cellulose, which can be used in a variety of insulation. Due to binding, i.e. the bearing capacity of the formed structure, the insulating material made according to the invention does not contain moisture, and there is no need for water supply with the exception of diluting the adhesive. Thus, no growth of bacteria occurs in the insulating material. The insulation material according to the invention is made in such a way and with the help of such materials that in addition to cellulose wool, both the binding agent and the adhesive have the same heat and moisture transfer coefficient values as the base material, which improves the quality of the insulation material. The invention is particularly suitable for the production of flat insulating boards and for insulation, intended for installation inside a building element, for example, a wall element, but also for insulation at the construction site. The insulating material will also have a uniformly distributed structure.

List of drawings
Below the invention is described in more detail with reference to the accompanying drawings, in which:
FIG. 1 depicts in schematic form a device for the manufacture of insulating boards using the method proposed in the present invention;
FIG. 2 is a schematic diagram of a device with which building elements are insulated using the method of the present invention;
FIG. 3 shows a construction of a flat insulating material;
FIG. 4 shows the processing of the ends of a flat insulating material;
FIG. 5 shows a stack of insulating material on a building element in a plan view;
FIG. 6 shows the laying of insulating material on a building element in the direction of arrow A in FIG. 5;
FIG. 7 shows the construction of the end of the actuator shown in FIG. 5.

Information confirming the possibility of implementing the invention
In FIG. 1, number 1 denotes a discharge pump through which a dispersed material made on the basis of cellulose cotton - viscose fiber insulating material 2 is fed into the deflector 3. The lower part of the deflector 3 is made of mesh 4, rotating between the rollers 5. In the longitudinal direction on the mesh 4 there are flat parts determining the width of the insulation panels. The distribution conveyor 7, rotating at the speed of the mesh conveyor 6, is located at the bottom of the deflector 3 and rests on the rolls 8. The pushers 9 of the distribution conveyor 7 protrude toward the surface of the mesh 4 in their lower position. The adhesive is sprayed onto the mass of insulating material through the spray nozzles 10 for adhesive. From the shaft 12 to the mesh 4 serves the lower viscose mesh 11.

 Insulating material 2 made on the basis of cellulose wool and viscose fiber is sucked up by pumps (fans) 13 and 14, turning into a smooth mat located on top of the viscose net 11 on which it is glued. The vacuum created by the pumps (fans) 13 and 14 is aligned with the suction boxes 15 and 16 located under the net 4. The arrows indicate the direction of flow. A rotating brush 17 equalizes the thickness of the insulating layer 18. The upper viscose mesh 19 is applied to the insulating layer 18, and the fabric is adhered using adhesive sprayed by the nozzle 10. The adhesive is a cellulose-based material. The grid 22 is located between the rollers 23. Air circulates from the discharge pump 24 through the insulation layer 18, thereby drying. The arrows show the flow directions in the supply box 25 and the suction box 26. In the flow direction, a condenser unit 28, by which water is separated from the air stream, and a heater unit 29, heating the dried air, are located in the circulation pipe 27. The manufactured insulation plate 30 is fed to the rolls 31 for packaging.

 In FIG. 2 shows the insulation of an element with an insulating material made of cellulose wool, and a device designed to operate having the same operating principles as the device of the previous embodiment. Number 32 denotes a discharge pump (fan) through which the insulating mass 33 based on cellulose wool and viscose fibers is supplied to the supply deflector 34. On the table 36 the frame 35 of the element is assembled, while the frame 35 is transferred on the indicated table to the rotating element 37 with a mesh under supply deflector 34. The grid is indicated by the number 38, and the suction box under it is indicated by the number 39. The vacuum is provided by the suction of air by the pump 40 located under the grid 38, and the layer of insulating material for the element is smoothed. A rotary valve 42 and a low-pressure chamber 43 are located in the pipe 41, and a pulsating vacuum is created in the suction box 39 by means of the pipe. In the presence of pulsating rarefaction, cellulose wool compaction can be achieved. Rotating brush 44 performs reciprocating motion on the frame 35 of the element and aligns the insulation layer. Additional insulation is sucked off by pump 45 through line 46 and returned through pump 32 to line 47 for reuse. As soon as the insulation is completed, the supply deflector 34 rises, and the lid is nailed to the frame of the element or in some other way attached. After that, the frame 35 of the element is turned onto the table 49 by a mesh element 37, supported by a hinge 48, for attaching the bottom sheet, after which the insulation of the element is completed.

 The isolation method proposed in the present invention is as follows. Cellulose wool insulation, with which viscose fibers or their equivalents are mixed, is distributed on the grid in the presence of compressed air. By means of the vacuum created under the net, a smooth, uniform and elastic layer is formed from the insulation layer. By creating a pulsating vacuum, the compaction of the layer can be increased. The thickness of the insulation is leveled with a rotating brush, and excess insulation material is removed. Using the device shown in FIG. 1, the insulating board 30 is produced by a continuous process. Insulation 2 of cellulose wool and viscose fiber is supplied by an air stream to the viscose net 11 lying on top of the net 4. The adhesive is sprayed through nozzles 10 onto the insulation layer 18, and thus the insulation material adheres to the net 11. The insulation layer is formed on the distribution conveyor 7 by pushers 9. The insulation layer 18 is aligned with a rotating brush 17, the adhesive is sprayed onto the insulation layer using nozzles 10, and the upper viscose mesh 19 is glued from above. The wet insulation plate 30 is dried with hot dry air blown through the plate 30. Air is circulated in the condenser units 28 provided in the pipe 27 and through the heating device 29 with a charge pump 24. A heat pump can also be used for this purpose. The finished insulation plate 30 is moved on the rolls 31 for packaging.

 In the second embodiment shown in FIG. 2, the insulation of the building element is performed according to the principle of a cyclic process, one element at a time. The element frame 35 is assembled on a table 36 and transferred to insulate the mesh element 37. The deflector 34 is lowered to the upper surface of the mesh element 37. The vacuum created in the suction box 39 under the mesh 38 will align the insulation layer (cellulose wool and viscose) in all places, also in corners. The vibration effect created on the insulation layer by creating a pulsating vacuum is created by the rotary valve 42 provided in the pipe 41. The low-pressure chamber 43 enhances the effect of the vacuum. A pulsating vacuum reduces the power requirements of the pump 40. The insulation layer is leveled using a vertically adjustable, reciprocating rotary brush 44. Excess insulation material is sucked out by the fan 45. The supply deflector 34 is lifted to its upper position; pipelines 46 and 47 are elastic for lifting. The lid is nailed on top of the insulating frame 35; adhesive may be applied to the lid, or the adhesive may be sprayed on top of the insulation layer. The frame 35 is turned over on the table 49 using a rotatable mesh element, and the same operation is repeated for the lower part.

 For specialists it is obvious that the isolation method proposed in the present invention can be used in a wide variety of applications. The amount of adhesive and binder fibers may vary. The location and number of spray nozzles 10 for the adhesive may also vary. Of course, various solutions for moving and carrying out are possible. The surface materials of the insulation boards may be different, or they may not be used at all. Brushes 17 and 14 can also be made of a different type than the rotating brushes described in the present description.

 Next, with reference to the drawings of FIG. 3-4, the structure of the flat insulating material 430 is described. FIG. 3, an insulating board 430 is shown. The insulating board contains two wide side planes 431 and 432 and four smaller end planes 433 to 436. The insulating board 430 contains cellulose wool base material 437, 438 in two layers. The insulation material 430 also contains a bonding agent 439, 440, 441, bonded with adhesive 442, 440 and 443 to cellulose wool 437, 438. Thus, the number 440, denoting the middle bonding agent and the middle layer of adhesive, has two meanings, as the bonding agent and the adhesive can be combined, for example, in such a way that a viscose glue or other cellulosic glue that forms fibers upon drying and thus forms a bonding structure, i.e. supporting structure, used as an adhesive. However, the viscose mesh 439 and 441 forms the actual bonding agent, i.e. binding structures attached to cellulose wool, i.e. to cellulosic fibers 437 and 438, through adhesive 442 and 443. Cellulose wool is a cotton-like mass of wood fibers.

 In the invention, in addition to cellulose wool, the bonding agent and adhesive are also made from cellulose-based materials, so in this case all the insulation materials have the same base, and therefore the heat and moisture transfer properties of the bonding agent and adhesive will be the same as with the main material, i.e., cellulose wool, thereby improving the insulation properties. Viscose fibers are used as a binding agent, since viscose is a cellulose-based material, and therefore with good insulating ability. Viscose fibers used as a binding agent in the insulating material are viscose yarn, viscose mesh 439, 441 or viscose fibers obtained by drying viscose glue 440 used as an adhesive. In the embodiment of FIG. 3, a binder agent 439 located above and a binder agent 441 located below form a viscose net because it provides a good binder structure, i.e. the supporting structure, which serves as a support for cellulose wool 437, 438 and also makes it possible to trim insulating material 430. Viscose mesh 439, 441 also provide a neat outer surface that can withstand transhipment (during loading, etc.). The adhesive 442, 440, 443 used in the manufacture of the insulating material is a cellulose-based adhesive, preferably viscose glue, CMC glue (from carboxyl methyl cellulose), or an equivalent glue. Specifically between the layers of cellulose wool 437, 438, adhesive 440, i.e. a bonding agent 440 is made of viscose glue having a dual purpose. Also, the adhesive 443 located on top and the adhesive 442 below can be viewed from a dual purpose point of view, i.e. they form viscose fibers during drying and, thus, contribute to the creation of a bonding structure, i.e., a supporting structure, and on the other hand these formed fibers, as well as fibers of viscose nets 439, 441 are glued to cellulose wool 437, 438.

 In the simplest case, the insulating material between the lateral planes 431, 432 may contain cellulose wool on which viscose glue is sprayed or otherwise applied, since in this case the fibers, as well as the adhesive with which the fibers and cellulose wool are glued together, are simultaneously are introduced into isolation.

 The insulation material shown in FIG. 3-4, thus, is made in the form of a flat insulating plate 430 containing two wide lateral planes 431, 432 and four smaller end planes 443-436. As a bonding agent 439, 441, the insulating plate contains at least two viscose meshes 439, 441 between the end planes in the direction of the side planes. Cellulose wool 437, 438 is located in the area between the at least two viscose nets 439, 441 in the insulating material. Adhesive 442 is located between viscose net 439 and cellulose wool 437. Similarly, adhesive 443 is located between viscose net 441 and cellulose wool 438.

 In a preferred embodiment, viscose fibers are also located between the viscose nets 439, 441 in cellulose wool. This can be achieved, for example, in such a way that viscose yarn is embedded in cellulose wool 437, 438 in the form of continuous yarn or in the form of short pieces of yarn. Viscose yarn or other fibers in cellulose wool layers 437 and 438 are indicated by 450. By adjusting the number of viscose fibers 450 to be embedded in the region between the side planes 431, 432, i.e. Insulating materials with different hardness indices can be produced between the viscose nets 439, 441, and by adjusting the amount of adhesive to be used with viscose fibers.

 In an embodiment of the invention, a flat insulating plate 430 is made. A viscose mesh made of viscose fiber is used as a bonding agent 439, 441. Also, adhesive layers 442, 440 and 443 serve as a bonding agent for their part, if they are viscose adhesive or another preferably cellulose-based adhesive that forms fibers upon drying.

 With reference to FIG. 3-4 the following describes the production of flat insulating material, i.e. in accordance with the first embodiment of the invention. Using the device shown in FIG. 1, the insulating board shown in FIG. 3 is made in such a way that in the method, the adhesive 442, preferably viscose glue or other cellulose glue, is applied to the first viscose net 439, i.e. binding agent 439. The next step is to create a layer 437 of cellulose wool, i.e. a layer of pulp particles on top of the adhesive 442. In this regard, viscose yarn 450 can be mixed with a layer of cellulose wool 437 with adhesive, which serves as hardening, as described above. This is achieved in such a way that the adhesive-treated viscose fiber 450 is mixed with cellulose wool 437 and / or 438, which will be located between the viscose nets 439, 441. As a next step, the adhesive 440, which will also serve as a bonding agent between the layers of cellulose wool 437, 438, applied to the cellulose wool 437. The next step is to create a layer 438 of cellulose wool, that is, a layer of pulp particles on top of the adhesive 440. In the next step, a second viscose net 441, which serves as ve binding agent 441, placed on top of the adhesive layer 443. The next step is to cut a continuous strip of insulating material into size using the actuator to obtain an insulating plate 430 of predetermined sizes.

 In FIG. 4 shows an operation in which the ends 433-436 of the insulation material are coated with an actuator 460. In a preferred embodiment, the insulation material thus comprises ends 433-436 coated with an adhesive, preferably cellulose-based adhesive, for example viscose glue, and thus , the insulating material will better tolerate external influences and have better qualities. The coating is preferably performed after trimming to cover the ends of the insulating material 430 in the transverse direction relative to the direction of movement of the production line simultaneously with the side ends of the insulating material having the same direction as the line.

 In FIG. 5-7 show another embodiment of the invention. In FIG. 5-7, a building element 100 is shown, for example a wall element 100. The building element comprises racks 101 of a frame structure forming the frame of the building element. The building element further comprises panels 102, 103 covering the building element and forming with it a sectional closed structure 104-107 into which the insulation, here indicated by number 130, can be blown in or otherwise created. Insulation is indicated by number 130. In FIG. 5-6, the building element comprises five frame racks 101, and thus the element comprises four compartments 104-107, with two compartments 104 and 105 located on the left side, in FIG. 5-6 are already completely filled with insulating material using a discharge pump (fan). The third compartment 106 is being filled, and the fourth compartment 107 is still empty. In FIG. 5, the element is not shown in its entirety, but with a trimmed top edge.

 In a second embodiment of the invention, insulation 130 is formed inside the enclosed building element 100.

 In a second embodiment of the invention in FIG. 5-7, the device is a production line 201 on which insulation is embedded in an element. The production line includes, for example, conveyor belts 202 rotating between the rollers 203 and creating a leftward movement in the direction of arrow C in FIG. 6. The device further comprises an actuator 210, with which the materials used in the manufacture of insulation 130, can be supplied using an injection pump (fan) or in another way to the element 100. The actuator 210 contains a transfer element 211, using of which the actuator 210 can be transferred both longitudinally and in the transverse directions relative to the element 100 and the production line in order to fill the inner volume of the element 100 as well as possible 130 material including possible hard-to-reach areas. In FIG. 5, the device also contains a sealing element 700, with which the insulating material delivered to the building element by means of a discharge pump (fan) can be further densified. The device also includes a feed device 800 through which materials can be supplied to the actuator 210. In both the first and second embodiments, a method is used to produce insulation material 430 or 130. The base material of insulation material 430, 130 thus represents cellulose wool. According to the proposed method, a bonding agent, for example, viscose fibers directly in the form of fibers and / or in the form of viscose glue is used in the manufacture of insulating material. Cellulose wool is bonded to the bonding agent using an adhesive used according to the method, which essentially can also be a bonding agent / adhesive that forms fibers upon drying.

 In a preferred embodiment, viscose fibers, or another cellulose-based bonding agent, are used as a bonding agent in the manufacture of an insulating material, for example 430, 130. Similarly, cellulose-based adhesives, such as viscose glue, CMC glue (from carboxyl methyl cellulose) or the equivalent adhesive that forms the fibers upon drying is used as an adhesive, and thus, in simple versions of the invention, it is not necessary to use a separate binding agent, for example an example of viscose yarn, although the advantages of the invention are expanded using viscose yarn or other solid viscose fiber or equivalent cellulose fiber.

 In FIG. 5-7 base material, i.e. cellulose wool or cellulosic particles is indicated by 237, a bonding agent, such as viscose yarn, is indicated by 239, and adhesive, such as viscose glue or other cellulose glue, is indicated by 240.

 In FIG. 7, the actuator 210 is configured to include a feeder 212, for example, a screw conveyor 212 for feeding cellulose wool 237, a second feeder 213 for supplying a bonding agent 239, for example viscose fiber 239, and a third feeder 214 for supplying adhesive 240, for example, viscose glue 240. The actuator 210 comprises a rotating nozzle 210a located centrally at the end of the screw 212, a bonding agent 239 and adhesive 240 are fed through this nozzle while rotating the nozzle 210a. According to a preferred embodiment of the method according to the invention, the bonding agent 239 and the adhesive 240 are fed to the center of the pulp wool stream 237 so that the bonding agent stream 239, i.e. the fiber stream 239 and the adhesive stream 240 rotate, which ensures efficient distribution / dispersion of materials.

 The second embodiment of the invention shown in FIG. 5-7, therefore, relates to a method of manufacturing an insulating material 130 inside a building element 100. The base material for the insulating material 130 is formed from cellulose wool 237. A bonding agent 239, for example, viscose fiber 239 in the form of long or short fibers of yarn with which cellulose wool is bonded using adhesive 240, which is also included in the method, used for the manufacture of insulating material. In the simplest case of the method, a bonding agent 239, for example, viscose yarn 239, is treated with adhesive 240 before being blown into cellulose wool 237. Fiber 239 is formed at nozzle 210a.

 The actuator 210, 210a is moved relative to the element 100 or vice versa, and thus the actuator 210, 210a weaves the bonding agent 239 using adhesive 240 into the cellulose wool 237.

 In FIG. 5-7, initially the adhesive 240 is applied inside the building element 100, after which the cellulose wool 237, the bonding agent 239 and the adhesive 240 are injected substantially simultaneously into the building element 100 using the actuator 210, 210a.

 Initial application of adhesive in an empty element results in bonding spaces 400 between the building element 100 and the insulating material 130, which prevents the deposition of the insulating material even better than before.

 Since compressed air is used to inject materials into cell 100, excess pressure, that is, circulating air, must be removed using the same lines or pumping means 500. Dust from cellulose wool can be collected from the circulating air and reused if necessary.

 The embodiment depicted in FIG. 5-7 may also use the structure shown in FIG. 2, which uses a breathable mesh and a vacuum. In this case, panels 102, 103 or equivalent closing means are attached to the element only in the last operation, i.e. after the insulation is laid.

 Although the invention has been described above with reference to examples in accordance with the accompanying drawings, it is obvious that the invention is not limited to these examples, but can be modified in various ways within the framework of the inventive concept set forth in the attached claims.

Claims (18)

 1. An insulating material containing a base of cellulose wool and additionally a bonding agent bonded with cellulose wool adhesive, characterized in that the bonding agent is viscose fiber, and the adhesive is also made on the basis of cellulose.  2. The insulating material according to claim 1, characterized in that the viscose fiber used as a bonding agent in the insulating material is a viscose yarn, viscose mesh or viscose fiber formed by drying viscose glue used as an adhesive.  3. The insulating material according to claim 1 or 2, characterized in that the cellulose-based adhesive used in the manufacture of the insulating material is a viscose glue, CMC glue (from carboxylmethyl cellulose) or an equivalent glue.  4. The insulating material according to one of claims 1 to 3, characterized in that the insulating material is made in the form of a flat insulating plate containing two wide lateral planes and four smaller end planes, and the fact that the bonding agent of the insulating plate contains at least , two viscose nets between end planes having the same orientation as the lateral planes, and the insulating material contains cellulose wool between said at least two viscose nets, the adhesive being contained between the viscose net and cellulosic pulp wool, viscose fiber and preferably located in the cellulosic pulp wool between the viscose meshes.  5. Insulating material according to one of claims 1 to 3, characterized in that the insulating material is made in the form of insulation formed inside the building element, the insulation containing bonding places between the building element and the insulation, and said bonding places are formed using adhesive.  6. A method of manufacturing an insulating material, in which the base for the insulating material is formed from cellulose wool and the cellulose wool is bonded to a bonding agent using an adhesive, characterized in that cellulose-based adhesive is used, and viscose fiber is used as a bonding agent.  7. The method according to claim 6, characterized in that the adhesive used is viscose glue, CMC glue (from carboxyl methyl cellulose) or an equivalent glue.  8. The method according to claim 6, characterized in that they carry out the laying of the insulating material scattered with compressed air on a breathable plane, for example a viscose mesh and / or mesh rotating between the rollers, and the vacuum created under the specified mesh and evenly distributing the insulating material creates compression and friction between the fibers of the insulating material with its distribution in the form of a smooth and uniform layer at the place to be insulated, for example, a building element or insulating plate.  9. The method according to claim 8, characterized in that it includes the use of a device having upper and lower mesh conveyors made in the form of supply conveyors of the upper and lower viscose mesh or equivalent.  10. The method according to claim 8, characterized in that the vacuum is pulsed to expand the scope of application of the insulating material.  11. The method according to claim 8, characterized in that the thickness of the insulation layer is controlled by means of adjusting means, preferably in the form of a rotating brush or an equivalent means having an adjustable vertical position, and the insulation separated by said adjusting means is removed, or the layer is leveled isolation using the specified means.  12. The method according to claim 8, characterized in that the insulation layer containing adhesive and surface layers attached to it, for example, a viscose mesh or equivalent, is dried by passing drying and / or heated air through these layers.  13. The method according to p. 12, characterized in that the air draining the insulating plate, forms a closed loop.  14. The method according to p. 8, characterized in that to seal the upper surface of the insulating material, the additional thickness is removed by compression using a mesh, air pressure, sheet or using an equivalent method.  15. The method according to claim 6, characterized in that the manufacture of a flat insulating plate, and the fact that the viscose mesh formed from viscose fibers is used as a bonding agent, and in the manufacturing process, the first viscose mesh is laid on a production line for the manufacture of insulating material , adhesive and cellulose wool is applied on top of this mesh, on top of which the adhesive is again applied, and on top of which a second viscose mesh is laid.  16. The method according to p. 15, characterized in that the adhesive and viscose fibers are mixed with cellulose wool (437) located between the viscose nets.  17. The method according to claim 6, characterized in that the insulating mass based on cellulose and viscose fibers is fed by a fan through a supply deflector to a frame formed on the table corresponding to the size of the mesh element, and the mass distribution is provided by pulsating rarefaction of the suction box under the mesh element, and the vacuum is pulsed using a rotating valve located in the pipeline of the low-pressure chamber.  18. The method according to 17, characterized in that they use a device in which the feed deflector is made with the possibility of raising, and the mesh element is made with a hinge with the possibility of rotation on the table for attaching the bottom sheet and cover to the frame of the element. Priority on points:
01/03/1995 - according to claims 1 to 7 and 15 to 18;
04/05/1995 - according to claims 8-14 and 17, 18.

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