DE102005004504A1 - Thermal insulation panel, of mineral fibers and a bonding agent, has longitudinal and equidistant surface ribs at the large surfaces at the contact zones with the insulation - Google Patents

Abstract

The thermal insulation panel (1), of mineral fibers (2) and a bonding agent and especially mineral and/or glass wool, has projecting ribs (10) on at least one main axis direction at the large surfaces (3,4), on the contact zones (5,6) between the insulation and the outer surfaces. The ribs are at equal intervals, with a semi-circular cross section. The core zone (9) is composed of compressed loops (11) of a primary nonwoven felt, with their deflections bonded together in at least one contact zone. The bonding agent is a mixture of phenol, formaldehyde and urea resins.

Description

The The invention relates to a method for producing an insulating element from mineral fibers bound with binders, in particular from Rock wool and / or glass wool, in which the mineral fibers from a Melt produced and stored on a conveyor as a primary fleece become, the primary fleece perpendicular to its longitudinal extent suspended and as secondary fleece with a core area, which essentially has a course of mineral fibers has at right angles or steeply to the large surfaces, and at least an edge zone with a course of mineral fibers substantially parallel to the big ones surfaces on a second conveyor filed and a hardening oven for curing the binder is supplied and the secondary web subsequently by a separating cut parallel to the large surfaces of the secondary web in at least two insulating material webs subdivided and applied to at least one large surface, a carrier layer. The invention further relates to an insulation web made with a binder bonded mineral fibers, in particular mineral wool and / or Glass wool produced by the process consisting of a large surface area secondary nonwoven with a core area, which essentially has a course of mineral fibers rectangular or steep to the large surfaces, with a large surface and one when splitting a secondary web into two insulation webs resulting interface, wherein the mineral fibers in the region of the separation surface at right angles to the separation surface and in the area of the surface at an angle other than 90 ° to the large surface, in particular parallel to the big one surface are arranged running, and with a lamination

insulation materials from glassy solidified mineral fibers are made according to the chemical composition commercially in glass wool and rock wool insulation materials distinguished. Both varieties differ by the chemical composition of the mineral fibers. The glass wool fibers are made from silicate melts, the size Share of alkalis and boron oxides, which act as a flux Act. These melts have a wide processing range on and let themselves with the help of rotating bowls, whose Walls holes take off to relatively smooth and long mineral fibers, which is usually mixed with mixtures of thermosetting phenol-formaldehyde and urea resins are at least partially bonded. The amount this binder in the glass wool insulating materials is for example approx. 5 to about 10% by mass and is also limited by the fact that the character of a non-combustible insulating material should be preserved. The bond can also be made with thermoplastic Binders such as polyacrylates done. The pulp will be more Substances, such as oils in amounts below about 0.4% by mass for hydrophobing and dust binding added. The impregnated with binders and other additives mineral fibers collected as fiber web on a slow-moving conveyor. In most cases, the mineral fibers of several shredding devices successively on this conveyor stored. The mineral fibers in a plane are largely directionally oriented. But they store very flat on top of each other. Light vertical pressure turns the fiber web to the desired thickness and over the conveying speed of the Conveyor simultaneously compressed to the required density and the Binder in a curing oven by means of hot air hardened, so that the structure of the fibrous web is fixed.

at the production of rock wool insulation materials be impregnated Mineral fibers as possible thin and light mineral fiber fleece, a so-called primary fleece collected and at high speed out of the fiberizing apparatus led away, required coolant otherwise, in the course of the further manufacturing process With further energy expenditure would be to be removed again from the fiber web. Out the primary fleece an endless fiber web is built, which ensures a uniform distribution of the Mineral fibers.

The primary nonwoven consists of relatively coarse fiber flakes, in their core areas also higher binder concentrations present while weaker in the border areas or unconsolidated mineral fibers prevail. The mineral fibers are aligned in the fiber flakes approximately in the transport direction. Stone wool insulation materials have contents of binders of about 2 to about 4.5% by mass. at This small amount of binders is only part of the Mineral fibers in contact with the binders. As a binder predominantly mixtures of phenolic, formaldehyde and urea resins used. A part of the resins is also already by Polysacharide substituted. Inorganic binders are used as well as the glass wool insulation materials only for special applications of insulating materials used, since these are much brittle than the largely elastically to plastically reacting organic binder, what the desired character of the insulating materials from mineral fibers as elastic-resilient building materials accommodates. The additives are mostly high-boiling mineral oils in proportions of 0.2 mass%, in exceptional cases also about 0.4 mass% used.

Usually, the primary nonwovens with Assistance of a pendulum-suspended conveyor laid across another conveyor, which allows the production of one of a plurality of obliquely superposed individual layers existing endless fiber web. By a horizontally directed in the conveying direction and a simultaneous vertical compression, the fiber web can be unfolded more or less intense. The axes of the main folds are aligned horizontally and thus run transversely to the conveying direction.

The forces acting on the fiber web cause binder-rich core zones are compacted and unfolded into narrow lamellae, resulting in main folds with folds in flanks. At the same time, the less bound or binder-free mineral fibers are slightly rolled in the interstices of the folds and between the lamellae and thereby slightly compressed. The fine structure thus consists of relatively stiff slats, which have a certain flexibility due to their numerous folds, but are relatively stiff parallel to the folding axes and form intermediate spaces that are easily compressible. As a result of the build-ups and dislocations, the compressive strength and the transverse tensile strength of the fibrous web clearly increase in comparison with a normal, in particular extremely flat, arrangement of the mineral fibers. The flexural strength of the fibrous web or of the sections separated from it in the form of plates or Dämmfilzen is therefore significantly higher in the transverse direction than in the production direction. In roof insulation panels with gross densities of about 130 to 150 kg / m ³ , the bending strength in the transverse direction is on the order of three to four times as high as the bending strength in the direction of production.

These dependence the mechanical properties of the orientation of the mineral fibers in the insulating material is used for the production of lamellae for lamellar plates and commercial Used lamellar sheets called products.

Lamellae are usually 50 mm to 200 mm wide and 10 mm to 140 mm thick insulating material elements that are cut off in the direction of production by an at least correspondingly thick fiber web. The mineral fibers in the fiber web or in the particularly solid lamellae are oriented at right angles to the cut surfaces, which are now the large surfaces of the lamellae. Slats with densities of more than about 75 kg / m ³ are therefore suitable as tensile and pressure resistant insulating layer on the outer walls of buildings and can be glued on the outer wall and then plastered with a reinforced plaster layer. Such insulation is referred to as a thermal insulation composite system. The pressure-resistant lamella is sufficiently flexible in the longitudinal direction so that it can also be glued onto curved components. At the same time, it is still so compressible at right angles to the side surfaces that deviations from the respective length and width (dimensional tolerances) between the individual lamellas can be compensated with a small contact pressure. This can be used to produce joint-tight insulation layers. Several lamellae are further assembled into lamella plates or lamellae lanes.

Slat plates in the bulk density range of about 30 to about 100 kg / m ³ , preferably <60 kg / m ³ are separated in the desired thickness in the production direction as lamellae of between about 75 to 250 mm thick fiber web lying flat transverse be glued to a closed carrier material. The individual slats are pressed together only under slight pressure and usually form no closed insulation layer. In order to have low combustible substance in the lamellar plate for reasons of fire safety, the specific amounts of, for example, dispersion adhesives are very low. For example, even more technically, composite films can be joined to the surface of the lamellae by heating a film layer which is often only about 0.03 to 0.06 mm thick.

On The same type of slat plates can also be made of glass wool fiber webs at right angles to the big ones surfaces produce running mineral fibers. The smooth mineral fibers are in these lamellae extremely parallel to each other directed and opposite lateral forces very easy to compress, especially as the bulk densities are generally lower are as the lamella plates of rock wool insulation materials.

Lamellae can also be used to produce lamellar webs having widths of, for example, 500 mm or 1000 mm, thicknesses of approximately 20 mm to approximately 100 mm and lengths of several meters. Due to the orientation of the mineral fibers at right angles to the large surfaces can be flat surfaces, for example, provided by large ventilation ducts with a flat and relatively strong insulation layer. The lamella webs are formed compressible and can therefore be performed in the direction of the width of the slats, ie in the longitudinal direction of the slat webs readily to pipelines with small diameters and there give a uniform sheath. This behavior is favored by the joints between the individual lamellae, since here the transverse stiffening of the insulating material is interrupted. The lamellae of the lamellar webs are arranged on a carrier layer and connected to the carrier layer, in particular adhesively bonded. As a carrier layer, in particular metal, metal-plastic composite or metal-paper-plastic composite films are used, which in addition by lattice scrims of different like fibers can be reinforced.

The slat webs that can be produced from individual slats are limited in terms of their material thickness by the weight of the slats and, among other things, by the weight of the slats, limited adhesive strength on the carrier layer and by the maximum material thickness of the secondary web. The lamellae are disc-wise separated from a mineral fiber web produced in the usual way, in particular a secondary fleece and glued to the support layer with one of the two cut surfaces, so that the lamellae and thus the lamellae a course of the individual mineral fibers exactly at right angles or at steep angles to the cut surfaces the lamellae and thus have the large surfaces of the lamella web. Depending on the bulk density and the binder contents, the lamellae have a comparatively high transverse tensile strength and at the same time a high compressive strength, so that the lamellae are compressible and in particular compressible in the longitudinal direction of the lamella web. Laminated sheets with gross densities of up to approx. 60 kg / m ³ are therefore also used to insulate round components such as pipes, containers and other shaped surfaces. Due to their sufficiently high compressive strength, even roundness or flatness, lamellar sheets can also wear clothing, for example made of thin sheets, free of thermal bridges, without further support structures.

slat tracks and allow slat plates with a narrow width at constant force greater deformations than lamellae and slat plates with larger width. The possible Bending radius of these lamellar sheets and lamella plates increases increasing insulation thickness and bulk density. The increasing with decreasing bending radius Compression of the inner zones of the lamellar sheet or lamellar plate leads to a considerable compression, but also to increase the compressive strength in these zones. Slats are therefore suitable as well as fixed, but much more expensive to produce pipe shells as a supporting Layer for the sheathing of piping, for example with smooth or profiled sheets of, for example, steel, aluminum, plastic films, Gypsum or mortar layers. The right-angled or, in the case of pipelines, radially aligned with the insulated surfaces Mineral fibers lead to an increase the thermal conductivity the insulating materials across from such insulating materials, which have a laminar fiber structure or against pipe shells, in which the mineral fibers are concentric around the central axis of the pipeline are arranged.

The Production of slats is technically complicated and leads to a low throughput speed of production equipment. The bonding technique is also partly heavy for the part substantially not suitable. An adhesive bond between adjacent lamellae can also be weakened by the fact that in the area of adhesive surfaces loose mineral fibers or mineral fiber fragments (dust) are present.

slat tracks be tightly rolled up for storage and transport and with a wrapping wrapped. Here, the slats at the beginning and at the end of a Roller strongly stressed on shear. Fall after unrolling these slats off easily. The slats are even thrown off, if the lamellar web is allowed to open after removing the wrappings through the influence of the big ones Restoring forces independently unroll. This uncontrolled unrolling process will be the end the role whipped like a whip through the air, so that already partially detached Slats due to the acceleration or the strong impact of the End to the ground completely superseded become.

Farther there is a risk that individual lamellae from the lamellar web to solve, if the slats are accidentally folded outwards. Because of the initially insufficient strength the connection of the fins and the negative effects in the Handling the lamellar webs divide carrier layers, which only partially are glued to the slats, largely off. These include, for example Mesh fabric made of glass fibers or similar flat structures.

The as single elements glued lamellar plates have processing technology the advantage that necessary cuts either along the Cross joints between adjacent slats can be executed or this at least as an auxiliary line for the leadership to serve a cutting tool. The transverse joints can also serve as a kink on the carrier layer be marked by folding the lamellae slats in terms of their size to the Adjustment conditions.

A much more economical method for the production of insulating materials with the characteristic of lamellae, lamellar plates or lamellar sheets orientation of the mineral fibers is in the EP 0 741 827 B1 described. In this method, a thin primary nonwoven is unfolded by an up and down moving conveyor and placed endlessly and looped on a second conveyor. This results in individual layers pressed together in the horizontal direction and compressed differently depending on the desired density depending on the who the. For this purpose, the primary fleece is guided between two pressure-resistant bands, which initially limit only the height of the primary fleece. Already hereby, the mineral fibers are aligned in the arcuately deflected tracks of the primary web parallel to boundary surfaces. To obtain largely flat surfaces, the primary nonwoven can also be actively compressed in the vertical direction.

These Alignment of the mineral fibers in the primary web can be done in a separate Device done, but is useful in conjunction with a curing oven performed. In the curing oven The endless fibrous web is sandwiched between two pressure bands, of which at least one is movable in the vertical direction, with hot air in flows through vertical direction. The printing tapes have pressure-resistant elements with holes in which surface areas of the Press fiber web, making the surfaces a Obtained profiling. In the two surfaces of the fibrous web it can to a further alignment of the mineral fibers, another Compaction over the underlying areas and possibly to a slight binder enrichment come.

With Help the heat energy transferred by the hot air becomes the fibrous web with the binding and / or impregnating agents contained therein warmed up, so that in the fiber web existing moisture is expelled and harden the binders, in which they form connecting films or solids. After fixation the fibrous web by solidification of the binder is shown in longitudinal section a structure in which the mineral fibers in the core of the primary nonwoven predominate perpendicular to the large surfaces of the endless fibrous web are oriented.

In the near-surface In areas of mineral fibers are aligned parallel to the large surfaces. Because of the relatively large Stiffness of the core of the primary nonwoven can the mineral fibers at correspondingly large vertical pressures also fungus-like compressed and / or down between the zones with perpendicular to the large surfaces running Pressed mineral fibers. Between the arcuate deflected tracks of the primary web generally remain small gussets, which are different widths and different deep transverse grooves in the two major surfaces of the endless fibrous web occur.

in the Horizontal section, the higher density zones differ with the right angle to the big one surfaces extending mineral fibers clearly from the intermediate zones with a flat arrangement of mineral fibers. In cross-section is the structure less even than in insulation boards, the used for the production of lamellae. Such is for example the bending tensile strength due to the inhomogeneity of the structure at comparable density lower.

From the EP 0 741 827 B1 Furthermore, the production of laminated Dämmfilzen is known in which the endless loop-shaped unfolded fiber web are glued on both large surfaces with support layers of aluminum foil and the fiber web is then cut centrally and parallel to their large surfaces, so that ultimately two equally thick and laminated fiber webs arise which are then rolled up. The partial bonding and the low transverse tensile strength of the mineral fibers leads to a low-strength composite, its connection compared to a lamellar plate or a lamella mat in the thus prepared, called Dämmfilze fiber webs only a partial bonding with the carrier layer from slats is much less solid. However, this difference does not play a significant role in a continuously bonded fiber web, in particular when detaching the carrier layers at the two ends. However, the outer, unbacked compressible zones lead to bumps.

The EP 0 867 572 A2 further describes an insulating element made of mineral fibers, consisting of a mineral fiber fleece and / or a plurality of interconnected lamellae and at least one applied on a main surface lamination in the form of a film. This insulating element thus consists of a thin uniform fiber web of flat superimposed and interconnected individual mineral fibers with a thickness of less than 15 mm and a lamination and several interconnected slats. The lamination can be applied both on the thin fiber web and on the lamellae.

From the DD 248 934 A3 and in this known as the prior art EP 1 152 094 A1 as well as the DE 197 58 700 C2 Methods are known in which a impregnated with binding and other additives fiber web is divided into slats, which are rotated by 90 ° and then pressed together horizontally and compressed vertically, so that slat webs arise. It is also envisaged that the individual slats are densified differently and formed of different materials. After assembly of the individual lamellae, the mineral fibers are oriented more or less at right angles to the large surfaces depending on the orientation in the original fiber web. Due to the indispensable vertical pressure, the mineral fibers present in the two near-surface zones are also being transformed bent and fixed in a flat storage.

Strengthening can be found in the in the EP 0 741 827 B1 as well as in the DD 248 934 A3 described method that the passing of the curing oven, the topmost, a few microns to millimeters thick zone of the fiber web is more compacted and enriched with binders, as the immediately underlying zones. Thus, a firmer contact with the lamination can be made, although the decisive for the use of transverse tensile strength of the fiber web is primarily influenced by the lower-lying zones.

outgoing From this prior art, the invention is based on the object a method for producing an insulating element and a insulating element in such a way that in a simple and therefore more cost-effective Way an insulating element can be produced, which improved strength properties at the same time improved thermal conductivity has, so that the insulating element both in the field of insulation of building facades as well as in the area of curved surfaces can be used.

to solution This task is in a method according to the invention provided that with the carrier layer to be joined large surface after passing through the curing oven the application of the carrier layer by removing protrusions and / or bumps just trained. On the part of an insulating element according to the invention is the solution The task provided that a backing layer on a smooth trained big surface of the secondary web is arranged and that the carrier layer on the big one surface is attached.

With A method according to the invention may contain insulating elements produced, which is a course of a part of the mineral fibers parallel to the big ones surfaces has, whereby the heat transfer through the insulating material is reduced in the direction perpendicular to the large surfaces. square to these mineral fibers, ie in the main direction of the transmission heat losses increase aligned mineral fibers however, the thermal conductivity. These perpendicular to the large surfaces running Increase mineral fibers the transverse tensile and compressive strength of the insulating material and reduce the Stiffness parallel to the large surfaces. These Let properties dependent on the orientation of the mineral fibers themselves in a suitably directed mineral fiber structure of a Insulation element according to the invention combine, this structure, especially in a rollable insulating sheet to the effect that shows that the insulating material web in an outer, with the carrier layer connected zone the structure and properties of an insulating felt while, while which adjoin this zone Areas of insulation web to one opposite arranged and unlaminated from formed large surface by the alignment of the Mineral fibers perpendicular to the large surfaces the favorable properties of lamellar webs have.

According to the invention Secondary web after the pass through the hardening furnace in the area of their with the backing layer machined by grinding the surface, for example, around protrusions and / or remove bumps. At the same time also become mineral fibers removed, whose alignment is not parallel or perpendicular to the big surface given is. To larger quantity to eliminate mineral fibers may alternatively be provided that mineral fibers to a predetermined depth with at least a cut parallel to the large surfaces are cut away. Subsequently, then a grinding operation can be provided with the the required surface roughness is set.

The inventive method can immediately following the passage of the curing oven carried out become. In this case, both large surfaces of the secondary nonwovens machined and with a backing layer provided before the secondary web subsequently is divided into sections parallel and at right angles to the large surfaces.

at In alternative continuous production, the secondary web may be first by parallel and perpendicular to the large surfaces, especially with saws or Lasers guided Sections, are divided into sections, which sections below machined and glued to carrier layers and then rolled up or be stored flat on, for example, pallets.

at The machining are at least perforated by Hardening furnace bands caused projections or elevations removed. Here, contact zones are maintained, in which the mineral fibers run absolutely parallel to the large surfaces are arranged.

According to one embodiment of the invention, it is provided that the region of the edge zone in which the mineral fibers are arranged flat or running at small angles to the large surface, are partially or completely removed. As a result, the bending ability and compressibility of Se kundärvlieses or the insulating element produced therefrom increased in its longitudinal axis direction.

With a different depth of erosion of Mineralfasem adjacent to the surface Area of the border zone become the mineral fibers with a steeper one Alignment to the big one Exposed surface, whereby the transverse tensile strength of the secondary web or of the insulating element produced therefrom in the area of the big ones surface enlarged, so that also the adhesive bond between the large surface and the arranged thereon backing is significantly improved, the carrier layer is laminated to the surface.

With the distance of the aligned substantially parallel to the large surface Mineral fibers and an increased proportion of steep to rectangular to the big one surface oriented mineral fibers increase the heat transfer through the insulating element.

One Made according to this invention insulating element is due in the region of, opposite to the large surface formed with the carrier layer arranged, usually unbacked large surface oriented at right angles Mineral fibers preferred for insulation smooth curved Surfaces, such as suitable for pipelines. The compressibility of the insulating element in the area of the large surface with orientation of the mineral fibers perpendicular to the large surface increased according to a further feature of the invention thereby that the secondary web or the insulating element is pre-compressed during rolling up and thereby elasticized.

The Insulating element according to the invention can with a covering, for example with a cover of one thin Sheet metal are covered, wherein the cladding is preferred on the with large surfaces the mineral fibers extending parallel thereto are arranged so that the slightly compressible outer edge zone below the backing elastically resilient to the inner surface can adapt to the disguise. In the same way, the elasticity of the insulating element be used for the arrangement of insulating elements in Insulate at a small distance from each other arranged pipes. In this application, the elasticity of the insulation elements according to the invention used in the contact areas.

To a further feature of the invention is provided in at least a big Surface, in particular in the with the carrier layer connected surface preferably before winding, in particular at right angles to the longitudinal axis of the secondary web running incisions and / or recesses are introduced. Such trained insulating elements have the advantage that their elasticity is improved, so they even with larger material thicknesses and associated greater rigidity are rollable or windable. Also, these insulation elements could through this Design for insulation of objects with strongly curved surfaces be used.

Further Feature and advantages of the invention will become apparent from the following Description of the associated Drawing, in the preferred embodiments of an insulating element and a device for producing an insulating element are. In the drawing show:

1 a first portion of a schematically illustrated plant for producing an insulating element made of mineral fibers;

2 a second section of the plant for carrying out the method for producing an insulating element made of mineral fibers according to 1 .

3 a section of an insulating element in different processing stages in longitudinal section and

4 a subdivided into several sections insulation element in side view.

1 shows the first section of a plant 1 for producing a sheet-like insulating element 2 ( 2 ) made of mineral fibers 3 , The mineral fibers 3 are made of a silicate material, such as natural and / or artificial stones, by placing in a cupola 4 the silicate material melted and the melt 5 a fiberizing aggregate 6 is supplied. The fiberizing aggregate 6 has several spinning wheels spinning 7 on, of which in 1 only a spinning wheel 7 is shown.

The cupola furnace 4 has a spout on the output side 8th on, over which the melt 5 from the cupola furnace 4 on the spinning wheels 7 flows.

Due to the rotational movement of the spinning wheels 7 become the mineral fibers 3 from the melt 5 formed and on a first conveyor belt 9 collected. On this first conveyor belt 9 a primary fleece forms 10 in which the ones with in the fiberizing aggregate 6 mineral fibers mixed with binders 3 aligned in substantially the same direction and laminar are arranged. The primary fleece 10 is then via a second conveyor belt 11 , which unlike the first conveyor belt 9 no collecting conveyor belt, but a conveyor belt is, a downstream processing station 12 to hand over.

In the processing station 12 becomes the general transport direction of the primary web 10 changed. This change takes place from the original longitudinal direction into a transport in the original transverse direction of the primary nonwoven 10 , The conveying direction is in 1 through an arrow 13 shown.

The primary fleece 10 is about a roller 14 transported, the purpose of which is the transport direction of the primary web 10 from a substantially horizontal direction to change in a substantially vertical direction to the primary web 10 another processing station 15 supply. This further processing station 15 has two parallel conveyor belts 16 . 17 on, between which the primary fleece 10 is guided. The conveyor belts 16 . 17 are arranged pendulum and commute the primary fleece 10 perpendicular to its longitudinal extent as a secondary web 18 on a further conveyor not shown, which parallel to the conveyor belts 9 and 11 runs.

The thus suspended secondary web 18 then becomes a compression station 19 supplied in which the secondary web 18 is compressed. The compaction station 19 has an upper conveyor belt 20 and a lower conveyor belt 21 on, between which the secondary fleece 18 running. The two conveyor belts 20 and 21 the compression station 19 are arranged pendulum and have in addition to the function of compression of the secondary web 18 also the function, the compacted secondary web 18 meandering in the longitudinal direction. This floating of the secondary web 18 causes the secondary web 18 in its middle area an orientation of the mineral fibers 3 which is perpendicular to the large surfaces 22 . 23 is aligned. In fringe areas 101 immediately below the large surfaces 22 . 23 has the secondary web 18 an orientation of the mineral fibers 3 at an angle deviating from the orthogonal to the large surfaces 22 . 23 to a parallel orientation relative to these large surfaces 22 . 23 varied. This arrangement and orientation of mineral fibers 3 in the secondary web 18 results from the floating of the secondary web 18 following the compression station 19 ,

The suspended secondary web 18 becomes immediately after the pendulum of a processing station 24 fed, which is an upper conveyor belt 25 and a lower conveyor belt 26 and their conveying speeds compared to the conveying speed of the compression station 19 is lower, so that the suspended secondary web 18 compressed in its longitudinal direction and the individual meanders of the suspended secondary web 18 be pushed together.

The processing station 24 is another processing station 27 downstream, which is also an upper conveyor belt 28 and a lower conveyor belt 29 between which the suspended secondary web 18 is encouraged. The processing station 27 has a further reduced conveying speed of the secondary web 18 on to the compaction and the homogenization of the suspended secondary web 18 continue.

The thus prepared secondary web 18 forms an end product that leads to the formation of certain insulating elements 2 from mineral fibers 3 in which, for example, insulation boards or insulating material webs can be further processed, as described below in relation to 2 is described.

The meandering unfolded and compressed secondary web 18 becomes a hardening furnace 30 supplied by two parallel conveyor belts 31 and 32 are arranged. In the hardening oven 30 is hot air through the conveyor belts 31 . 32 and thus also by the secondary web 18 promoted, which hot air in the secondary web 18 for the connection of the individual mineral fibers 3 cures contained binder. The curing of the binder is the secondary web 18 in its geometric shape, it is in front of the hardening furnace through the processing stations 12 . 15 . 19 and 24 such as 27 received, fixed. At the same time, the secondary web becomes 18 between the conveyor belts 31 . 32 of the curing oven 30 compressed.

The distance between the two conveyor belts 31 . 32 in the curing oven 30 is on the material thickness of the secondary web 18 adjusted and by the conveying speed of the conveyor belts 31 . 32 in proportion to the amount of hot air required to cure the binder is limited.

After the curing oven 30 runs the secondary web 18 through a first sawing station 33 making a band saw 34 with a band-shaped saw blade 35 having, with which saw blade 35 the secondary web 18 through a separating cut parallel to the large surfaces 22 . 23 in two insulation elements 2 is divided, each with a large surface 22 . 23 and a substantially coextensive, the respective large surface 22 . 23 opposite separating surface 36 exhibit.

The width of 2,400 mm secondary nonwoven 18 is then passed through a circular saw with a circular saw blade 37 divided longitudinally into four sub-webs, each sub-web ultimately an insulating element 2 represents and has a width of 1,200 m.

The longitudinal direction through the separating cut parallel to the large surfaces 22 . 23 of the secondary web 18 separate insulation elements 22 are lifted from each other and fed to a laminating station, in the on a large surface 22 . 23 Separating surfaces of the insulating elements 2 a carrier layer 39 is applied. The carrier layers 39 are here for each insulation web 2 stored in each case a Kaschierungsrolle, wherein the carrier layers 39 with the promotion of insulation elements 2 deducted from the laminating roll and coextensive with the insulating elements 2 is glued. After the laminating station are the insulating elements 2 wrapped and packed. For this purpose, the insulating elements 2 in a predetermined length measure of the secondary web 18 by a section perpendicular to the longitudinal direction of the secondary web 18 cut to length.

The carrier layer 39 is formed as an aluminum-polyethylene composite film and forms an outer reinforcing, protective and / or decorative layer. The connection of the carrier layer 39 with the insulating element 2 in the laminating station is done by a on the insulating element 2 sprayed on high-viscosity dispersion adhesive, depending on the required connection between the carrier layer 39 and the insulating element 2 and its adhesive effect is sprayed over the entire surface, selectively or in strips. The carrier layer 39 is on the big surface 22 . 23 of the insulating element 2 arranged, in whose area the mineral fibers 3 parallel to the large surface 22 . 23 are arranged. It is additionally provided that before winding the insulating element 2 in the area of large surfaces 22 . 23 existing mineral fibers 3 which is of a rectangular orientation to the large surfaces 22 . 23 differ, be partially removed by cutting or grinding, with protrusions of mineral fibers 3 or bumps in the large surface 22 . 23 be removed to a flat and smooth surface for attachment of the carrier layer 39 to accomplish.

In 3 it can be seen that with the cutting tools 114 either part of the fringes 101 or the entire margins 101 can be removed, leaving the secondary web 18 may have different fiber gradients. In particular, from a secondary web 18 according to 3 the insulating elements 2 according to 4 or the secondary web 18 can have a total exclusively rectangular course of mineral fibers 2 to the big surfaces 22 . 23 exhibit before the secondary web 18 with the carrier layer 39 is connected.

The insulation elements 2 according to 4 are thus characterized by the fact that the margins 101 in the area of large surfaces 22 . 23 have been partially removed and that the cut surface 115 to achieve a high transverse tensile strength in a core area 109 of the insulating element 1 according to 4 is trained.

The insulation elements 2 may be formed as insulation panels and manufactured in many different dimensions depending on the width of the production facilities.

In the 4 illustrated insulating elements 2 are formed web-shaped, wherein the carrier layer 39 on a smoothly formed large surface 22 . 23 is arranged. The carrier layer 39 is on the big surface 22 . 23 in the area of the edge zone 101 arranged, which edge zone the mineral fibers 3 essentially parallel to the large surface 22 . 23 are arranged running.

The connection between the carrier layer 39 and the edge zone 101 takes place in the case of a carrier layer 39 made of an aluminum-polyethylene composite film in that the aluminum-polyethylene composite film is heated, so that the plastic content in the composite film softens and with the large surface area 22 . 23 in the area of the edge zone 101 bonded.

The insulation elements 2 according to 4 are from a secondary web 18 by a division of the secondary web 18 formed in accordance with the above description, wherein in the secondary web the primary web 10 is arranged meandering. In the diversion areas between the meanders, gussets are created, into which mineral fibers 3 be displaced.

In 4 it can be seen that the edge zone 101 in different material thickness from the large surface 22 . 23 can be removed starting. As a result, the material thickness of the edge zone is affected to the insulating element 2 to adapt to the application.

Claims (16)

Process for the production of an insulating element made of mineral fibers bound with binders, in particular of rock wool and / or glass wool, in which the mineral fibers are produced from a melt and conveyed on a conveying device as Pri märvlies be deposited, the primary web pendulum perpendicular to its longitudinal extent and as a secondary web with a core region having a course of mineral fibers substantially perpendicular or steep to the large surfaces, and at least one edge zone with a course of mineral fibers substantially parallel to the large surfaces stored on a second conveyor and fed to a curing oven for curing of the binder and the secondary nonwoven is then divided by a separating cut parallel to the large surfaces of the secondary web in at least two insulation webs and applied to at least one large surface a carrier layer, characterized in that the the carrier layer ( 39 ) to be connected large surface ( 22 . 23 ) after passing through the curing oven ( 30 ) before applying the carrier layer ( 39 ) is formed flat by removing protrusions and / or unevenness. A method according to claim 1, characterized in that the projections and / or unevenness by grinding and / or by at least one cut parallel to the large surface ( 22 . 23 ) are removed. A method according to claim 1, characterized in that the projections and / or unevenness together with mineral fibers ( 3 ) into a region of the edge zone ( 101 ), in which the mineral fibers ( 3 ) predominantly, namely at least 80% parallel to the large surface ( 22 . 23 ) are aligned. Method according to claim 1, characterized in that as carrier layer ( 39 ) an air-permeable and / or heat-resistant nonwoven fabric or woven fabric, in particular of glass and / or natural fibers or organic chemical fibers, such as carbon, aramid, terephthalate, polyamide, polypropylene or mixtures thereof or as a film, for example aluminum-polyethylene Composite film and at least one layer and in particular in the form of tensile webs is applied. A method according to claim 3, characterized in that in the region of the edge zone ( 101 ) not parallel to the large surfaces ( 22 . 23 ) running mineral fibers in gusset between adjacent meanders ( 3 ) of the secondary web ( 18 ) are displaced. A method according to claim 1, characterized in that with the carrier layer ( 39 ) connected secondary web ( 18 ) is wound up. A method according to claim 1, characterized in that with the carrier layer ( 39 ) connected secondary web ( 18 ) before winding in the direction of the surface normal of the large surfaces ( 22 . 23 ) is compressed. Method according to claim 1, characterized in that the carrier layer ( 39 ) with the secondary web ( 18 ) is glued. Method according to claim 1, characterized in that at least one large surface ( 22 . 23 ), in particular in the with the carrier layer ( 39 ) connected surface ( 22 . 23 ) preferably before winding, preferably at right angles to the longitudinal axis of the secondary web ( 18 ) running incisions and / or recesses are introduced. A method according to claim 1, characterized in that the secondary nonwoven ( 18 ) before applying the carrier layer ( 39 ) is divided into sections parallel and / or at right angles to its longitudinal direction. Process according to claim 1, characterized in that the mineral fibers ( 3 ) with the carrier layer ( 39 ) to be connected to a large surface ( 22 . 23 ) after passing through the curing oven ( 30 ) before applying the carrier layer ( 39 ) down to the core area ( 109 ) are removed. Insulating sheet of mineral fibers bound with a binder, in particular of mineral wool and / or glass wool, produced by the method according to one of claims 1 to 11, consisting of a large surface having secondary nonwoven with a core region of a course of mineral fibers substantially at right angles or steeply having the large surfaces, with a large surface area and a separating surface resulting from splitting a secondary nonwoven web into two insulating webs, wherein the mineral fibers at right angles to the parting surface and at an angle deviating from 90 ° to the large surface, in particular parallel to the surface large surface are arranged running, and with a lining, characterized in that a carrier layer ( 39 ) on a smoothly formed large surface ( 22 . 23 ) of the secondary web ( 18 ) is arranged and that the carrier layer ( 39 ) on the large surface ( 22 . 23 ) is attached. Insulating material web according to claim 12, characterized in that between the carrier layer ( 39 ) and the large surface ( 22 . 23 ) at least one edge zone ( 101 ) with a course of mineral fibers ( 3 ) substantially parallel to the large surface ( 22 . 23 ) is arranged. Insulating material web according to claim 12, characterized in that the carrier layer ( 39 ) as a air-permeable and / or heat-resistant nonwoven fabric or scrim, in particular of glass and / or natural fibers or organic chemical fibers, such as carbon, aramid, terephthalate, polyamide, polypropylene or mixtures thereof or as a film, for example aluminum-polyethylene composite film and at least one layer and is designed in particular in the form of tensile strength webs. Insulating material web according to claim 12, characterized in that the carrier layer ( 39 ) with the secondary web ( 18 ) is glued. Insulating material web according to claim 12, characterized in that in at least one large surface ( 22 . 23 ), in particular in the with the carrier layer ( 39 ) connected surface ( 22 . 23 ), preferably at right angles to the longitudinal axis of the secondary web ( 18 ) extending incisions and / or recesses are arranged.