DE102004047193A1 - Insulation material strip manufacture involves production of mineral fiber fleece which is gathered and cut along the center parallel to outer faces before coating layer is applied to cut surface - Google Patents

Abstract

Mineral fibers are formed into a non-woven primary fleece which hangs down and is formed into a secondary fleece(18) with fibers running parallel to the main surfaces. The fleece is compressed and gathered so that the fibers are realigned to run at a right angle to the outer surfaces(22,23) of the fleece. A cut(33) is made through the resulting material strip parallel to the outer surfaces to form two insulating material strips(2). A coating layer(39) is then applied onto the cut faces(36) of both insulating material strips. The cut is made centrally between the outer faces of the secondary fleece. Prior to applying a coating layer(39) the insulating material(2) is fed through a curing oven(30) in which the binder of the original primary fleece is cured. Coating layers are bonded, preferably with hot melt adhesive, onto the insulating material, in particular at individual points and/or along lines. Coating layers acts as external reinforcing, protective, filtering and/or decorative layers and are drawn from reels(40) and fed with insulation strip to a laminating station(38) in which they are laminated together. Adhesion between a coating layer and the insulation is effected either by activating the fleece binder with water during passage through rolls or by spraying binder onto the cut surface before applying the coating layer. Alternatively a thin, high viscosity adhesive layer may be applied onto the coating layer. Both strips of insulation may be brought into contact after application of the coating layer and fed together to a curing oven. On leaving the oven it may be hemmed in the longitudinal direction, cut into lengths and wound up or cut into sheets and packaged. An independent claim is included for an insulating material strip manufactured from mineral and/or glass wool manufactured by the claimed process.

Description

The The invention relates to a method for producing an insulating material web of mineral fibers, in particular of rock wool and / or glass wool, in which the mineral fibers are made from a melt and on a conveyor filed as primary fleece become, the primary fleece perpendicular to its longitudinal extent suspended and as secondary fleece on a second conveyor is deposited, the secondary web subsequently is moved so that the mineral fibers are essentially a course perpendicular to the big ones surfaces of the secondary web take and then the secondary web through a separating cut parallel to the large surfaces of the secondary web in at least two insulating material webs is divided, each with a large surface and a substantially equal area, the big surface opposite arranged separation surface exhibit. The invention further relates to an insulation web made with a binder bonded mineral fibers, in particular mineral wool and / or Glass wool, with a big one surface and one when dividing 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 and an angle deviating from 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 binding agent in the glass wool insulation material is for example about 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 respectively. The fiber mass are other substances, such as oils in quantities added at about 0.4% by mass for hydrophobing and dust binding. The be impregnated with binders and other additives impregnated 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 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 uses. Part of the resins is already made by polysaccharides 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 are deposited by means of a pendulum-suspended conveyor transversely across another conveyor, which allows the production of an endless fibrous web consisting of a plurality of obliquely superimposed individual layers. 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 spaces which 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.

Slats are usually 200 mm wide insulating elements, which are cut in the direction of production of at least a 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 fins are also assembled to lamella plates.

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 adhered to a closed backing material, such as aluminum, aluminum composite, grid-reinforced aluminum-polyethylene composite sheets, and similar sheets, or, for example, to paper webs. 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. In terms of process technology, for example, aluminum-polyethylene composite films can be joined to the surface of the lamellae by heating the polyethylene film, which is often only about 0.03 to about 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.

Out Slats can also be produced lamellar webs, the widths for example, 500 mm or 1000 mm, thicknesses of about 20 mm to about 100 mm as well as lengths of several meters. Due to the orientation of the mineral fibers at right angles to the big ones surfaces can be flat surfaces, for example, of large ones Ventilation ducts with provided a flat and relatively solid insulation layer. simultaneously can the lamellar tracks due to the high compressibility in the direction the width of the fins, i. in the longitudinal direction of the slat webs be easily guided around pipelines with small diameters and give it a uniform sheath. favored this behavior is due to the joints between the individual slats, because here the transverse stiffening of the insulating material is interrupted.

Slat trajectories and slat plates with a small width allow for larger deformations at constant force than slat trays and slat plates with larger width. The possible bending radius of these insulating elements decreases with increasing insulation thickness and bulk density. The increasing with decreasing bending radius compression of the inner zones of the fiber web naturally leads to a considerable compression, but also to increase the compressive strength in these zones. Laminated webs are therefore suitable as solid, but much more expensive to produce pipe shells as a supporting layer for the sheathing of pipes, for example, with smooth or profiled sheets of steel, aluminum, plastic films, gypsum or mortar layers. The orthogonal or pipeline in the radial direction to the insulated upper surfaces aligned mineral fibers lead to an increase in the thermal conductivity of the insulating materials against such insulation materials having a laminar fiber structure or against pipe shells in which the mineral fibers are arranged concentrically around the central axis of the pipeline.

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 creates individual layers which are pressed against each other in the horizontal direction and are compressed differently depending on the desired density of density. 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 the aid of the thermal energy transmitted through the hot air, the fibrous web with the binding and / or impregnating agents contained therein is heated, so that moisture present in the fibrous web is expelled and the binders cure, in which they form connecting films or solids. After fixation of the fibrous web by solidification of the binder is shown in longitudinal section a structure in which the mineral fibers are oriented in the core of the primary web predominantly perpendicular to the large surfaces of the endless fiber web. In the near-surface areas, the mineral fibers are aligned parallel to the large surfaces. Because of the relatively high stiffness of the core of the primary web, the mineral fibers can with correspondingly large vertical pressures also mushroom-like compressed and / or be pressed down between the zones with perpendicular to the large surfaces extending mineral fibers. Between the arcuately deflected paths of the primary web generally remain small gussets that occur as different widths and different depths transverse grooves in the two major surfaces of the endless fiber web.

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.

The shallow mineral fibers in the near-surface zones significantly reduce the thermal conductivity at right angles to the large surfaces. From the EP 1 321 595 A2 It is known that the transverse tensile strength between these mineral fibers is weak, so that these lying flat mineral fibers are removed to tighter connections of the insulation boards produced therefrom, for example, with cladding for the production of sandwich panels or when used as plaster base in thermal insulation composite systems to reach.

There the near-surface Zones but depending on the compaction in the area of both large surfaces up to extend to depths of about 15 mm to about 35 mm in the fiber web, is their removal verbun with significant material losses, unless the separated zones themselves are used as insulation materials. Such coupling productions are considered difficult and become avoided if possible.

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. In the fibrous webs produced in this way and referred to as insulating felts, only a partial bonding with the carrier layer is possible. This partial bonding and the low transverse tensile strength of the mineral fibers leads to a low-strength composite whose connection is much less solid compared to a lamella plate or a lamellar mat of lamellae. 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 lamellar webs arise. It is also envisaged that the individual slats are densified differently and formed of different materials. After joining 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 bent over and fixed in a flat bearing.

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.

Based on the above-described prior art, the invention is therefore based on the object, a generic method ren for the production of an insulating sheet of mineral fibers to the effect that the manufactured insulating sheet is improved or simplified in terms of their strength properties and their processability, especially in the field of building exterior surfaces and pipe jacket surfaces. In addition, it is an object of the invention to provide a generic insulation web made of a binder bound mineral fibers, the improved processing properties and in particular improved strength properties and other properties of lamellae or lamellar sheets or plates in at least the same quality.

The solution This task looks at a generic method before that NEN on at least one of the parting surfaces of the two Dämmstoffbah a lamination is applied. The solution to the task an insulating material web according to the invention provides that the lamination is arranged on the separating surface. With the method according to the invention produced insulating material webs according to the invention should as possible with the basic characteristics of lamellar plates matching properties exhibit.

Therefore, according to the invention the lamination does not affect the compressible, weakly bound ones Areas of insulation web applied, but on the cross-resistant and at the same time pressure-resistant Divisions; namely in areas with mineral fibers oriented at right angles to the lamination. The the dividing surfaces opposite arranged surfaces are in contrast in the direction of their surface normals compressible and can As a result, unevenness of the surface to be insulated, such as a building facade adjust while then outboard arranged separating surfaces stay very smooth with the lamination. With such insulation tracks can For example, also flanges of ventilation ducts, sleeves or clamps Pipelines are insulated to a certain height without this Impact on the formation of the external surfaces of the Thermal insulation has. Flanges of ventilation ducts, sleeves or clamps in pipelines can therefore with an appropriate insulation web be overlapped from mineral fibers in such a way that the outer surface no Has unevenness.

The through the primary Unfolding of the primary web conditional convolutions can Hereby act as a bending or bending area, whereby the inside arranged surface the insulation web according to a traverse more easily the outside arranged round surface the one to be insulated area adapts.

at insulation tracks for exterior wall surfaces one ventilated Clothing, for example in the form of roll-up Dämmfilze or insulation boards used and also behind the core insulation an outer masonry shell Find use, resulting from the compressibility of the insulation web Significant economic benefits in terms of processing and the installation of the insulating material web according to the invention, in addition can at the method according to the invention be provided that in the large surfaces substantially parallel to the big ones surfaces extending mineral fibers are removed. Consequently, too the big ones surfaces edited so that in the large surfaces, a grain of fiber substantially perpendicular to these big ones surfaces prevails. By this development of the method according to the invention On the one hand, an exact thickness of the insulating material web can be adjusted and on the other hand, the strength properties are changed to that even the big surfaces of the insulation tracks are sufficiently pressure-resistant. Such formed insulating material web Its characteristics resemble the basic characteristics of a lamellar mat. The removal of substantially parallel to the large surfaces running Mineral fibers have about it In addition, the effect of having a visually appealing, in particular great level surface is created.

The Fibrous web, which according to this Invention in conclusion in at least two insulating material webs is subdivided, has mineral fibers bound with binders optionally, by hydrophobicizing and / or dust-binding Medium or other additives waterproof and is endlessly designed. The mineral fibers are inside the Fiber web down to near the surface Areas predominantly rectangular to the outside huge surfaces the fiber web oriented. Below the two large outboard surfaces The fibrous web are the mineral fibers at decreasing angles up to parallel to the big ones surfaces aligned. In the areas of large surfaces, the mineral fibers in one higher Density and with additional Binders be bound.

The fibrous web can be separated in front of a curing oven by the parallel to the large surfaces of the fibrous web or the secondary nonwoven separating cut to form the insulating material webs. The separating cut can hereby be carried out centrally but also off-center, so that either two equal material thickness insulating material webs or insulating material webs of different material thickness can be produced. By separating cut the dividing surfaces are formed, are applied to the air-permeable and / or heat-resistant nonwovens, tissue and / or scrim. These aforementioned Ka Schierungen can for example consist of glass, natural and / or organic man-made fibers. The chemical fibers can be formed, for example, from carbon, aramid, terephthalate, polyamide or polypropylene fibers or from mixtures of these above-mentioned chemical fibers.

Preferably if the laminations are tensile, web-shaped Laminations, wherein the laminations one or more layers formed are. If the lamination has several layers, these can Layers be formed of different fibers. Especially can For example, glass fiber random webs with Wirrvliesen thermoplastic Fasem or with perforated films made of thermoplastics.

To A further feature of the invention is that the tensile strength, sheet-like laminations with the insulating material web be glued, with this particular hot melt adhesive have proven to be the linear and / or punctiform on the lamination and / or the parting surface of the insulating material web are applied.

Next the above effects the laminations also as external reinforcement, Protective, filter and / or decorative layers serve.

For the implementation of the inventive method It has proved to be advantageous, the laminations roll-shaped in the area between the two resulting after the separation cut insulation tracks to arrange and the dividing surfaces the insulating material webs supply, before the lamination and insulation webs connected in this way are wound, the lamination inside the wrap is arranged.

at the separation of the fiber web in the partial webs to be laminated, namely insulating material webs it to an impairment, namely Reduction of adhesiveness the binder contained in the fibrous web come. To this impairment can counteract the binders present in the fibrous web, for example by solvents, in particular water are activated. Run for this purpose the insulating material webs via contact rollers, through which they use the solvent be wetted. Alternatively or additionally, further binders, preferably in small quantities on the surfaces and the parting surfaces of the insulation tracks sprayed become.

alternative can be provided that the lamination at least one-sided, namely at least on the interface facing surface one thin layer for example, a high-viscosity dispersion adhesive or a for example, filled with pigments Water-silicate plastic adhesive that acts as impregnation is arranged. The condition is that the lamination sufficient material thickness has to be this thin Be able to wear layer. It goes without saying it is also possible to use other adhesives insofar as they have a viscosity, which makes it possible the glue is not common capillary suction acting insulation webs be absorbed, so that the insulation webs subsequently up to brittleness saturate with these adhesives. These negative effects are evident, for example, during impregnation of fiberglass nonwovens or fiberglass fabrics with thermosetting resins, then afterwards on the interface of the insulating sheet applied and together with the insulation web a curing oven for curing the Binder fed become. When using a high-viscosity dispersion adhesive or one filled with pigments Water-silicate-plastic adhesive and a similar adhesive is a full-surface bonding the lamination on the interface possible, since the lamination the penetration of the individual mineral fibers in a perforation of a printing tape of the curing oven and thus the formation prevent surface embossing. Furthermore will not be additional Curing devices of the glue needed and the energy consumption for the curing reduced the adhesive.

The two insulation webs formed from the secondary nonwoven web can be brought together in front of the curing oven together with the laminations applied to the respective separating surfaces and passed together through the curing oven in which the binders of the secondary web and the adhesive between the lining and the separating surface solidified or cured by means of hot air become. Subsequently, the insulation webs thus formed can be trimmed in the longitudinal direction and cut to the appropriate length, wherein the cutting is carried out in lengths that lead to a wound insulation web or in shorter sections to insulation boards. The insulating materials made of the insulating material, for example, rock wool have densities between 23 kg / m ³ and 70 kg / m ³ , while corresponding insulation sheets of glass wool gross densities in the range between 12 kg / m ³ and 55 kg / m ³ have.

According to the embodiment described above, the secondary nonwoven is subdivided before the curing oven in the insulating material webs, which are provided before the curing oven with the laminations on the respective separation surfaces. Alternatively, it can be provided that the secondary web only after passing through the curing oven in the Insulating material webs is subdivided, which consequently can only be connected after passing through the curing oven with the lamination. In this case, the secondary nonwoven obtains its final structure before splitting into the insulating material webs by curing the binder in the curing oven. The separating cut is carried out with a band saw, with emerging sawdust being sucked off immediately in the area of the band saw so that it does not adhere to the separating surfaces and adversely affects the bonding of the lining to the insulating material webs.

Of the Adhesive for bonding the insulating material webs with the laminations is either on the divisions of the insulation tracks or applied directly to the lamination when the laminations not already in the factory with a corresponding adhesive layer are formed.

Next the above-mentioned air-permeable and heat-resistant laminations can Also films are used as laminations.

For example is an aluminum-polyethylene composite film as lamination for the above illustrated purposes. This aluminum-polyethylene composite film can about that Be reinforced by fiberglass mesh. The polyethylene layer is the application of the lamination on the parting surface of insulating sheet heated by means of a revolving heating roller, so that this polyethylene layer softens and with the tips of the mineral fibers of the insulation web welded.

at the method according to the invention can be provided that the two formed from the secondary web insulation tracks are formed identically, so that both insulating material also identical Wear laminations. But there is also the possibility that the two insulation sheets formed differently in particular with regard to the lamination become. It has already been stated above that the two insulation sheets different material thickness can have if the cut is not centered. In addition, the from a secondary web produced two insulation sheets also different in terms of the type and thickness of the lamination be formed. Furthermore, there is also the possibility of only one insulating material web form with a lamination, while the second insulation web processed without lamination, for example wound up becomes. There is also the possibility an insulation sheet to wrap up with lamination while the second insulation web with or without lamination in insulation boards is divided. Of course there is also the possibility the insulating web to be wound up to wrap without lamination while the second insulation web before being divided into insulation boards is glued with at least one lamination.

To Another feature of the invention is that the laminations together with the insulating material webs be trimmed at the edge so that the laminations are flush with the insulating material webs to lock.

at the use of insulating material webs according to the invention for the insulation of pipelines these are with their running in the longitudinal axis narrow sides arranged adjacent to each other at the pipeline, so that a complete insulation the pipeline is forming. The transition area the joints adjacent insulating material webs This can be covered in a simple manner with self-adhesive film tapes be, because the corresponding insulation webs have sufficient rigidity, the otherwise only at Given the state of the art lamellar mats is given. The self-adhesive foil tapes can but also already be part of the lamination, as far as this over a Longitudinal edge region the insulation web protrudes. So formed is the insulating material web according to the invention especially for the insulation suitable for pipelines, which serve to guide media whose Temperature below the ambient temperatures are. By this configuration the penetration of water vapor can be reliably prevented, as far as the lamination is formed of vapor-damping composite films, of which a border area over one in the longitudinal axis direction the insulation web running side surface survives, so that this edge region arranged on the lamination of a neighboring insulating sheet can be stuck on.

Next an embodiment an insulating material web according to the invention with a one-sided protruding Edge region of the lamination is of course also an embodiment conceivable, in which the lamination over two, in particular parallel extending edge regions of the insulating material web protrude. To the winding of such an insulating material web can be provided that at least in the area a supernatant Edge of the lamination a thin strip of paper with rolled up becomes.

It is provided according to a further feature of the invention that the glued laminations, in particular the glued films have markings. If the lamination is formed as an aluminum foil, it is possible in this regard to regularly repeating imprints or with the aid of be provided by color markings in the form of, for example, beams or arrows. It has proven to be sufficient if the markers are arranged in both extending in the longitudinal axis direction of the insulating material edge regions and have a length between 2 and 10 cm. Alternatively, the markers are arranged at intervals of about 10 cm, so that the markings are used in particular as an aid in cutting the insulating material webs. If the markings are designed as arrows, they can also indicate the conveying direction of a medium in a pipeline or a ventilation duct.

at correspondingly resistant Laminations that are in the heat discoloring Substances, such as binders may contain the Markers can also be applied with the help of a laser beam.

Further Features and advantages of the invention will become apparent from the following Description of the associated Drawing in which an embodiment a facility for implementation a method for producing an insulation sheet of mineral fibers is shown. In this drawing show:

1 a first section of a schematically illustrated plant for the production of an insulating sheet of mineral fibers and

2 a second section of the plant for carrying out the method for producing an insulating sheet of mineral fibers according to 1 ,

1 shows the first section of a plant 1 for producing an insulating material web 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 on the output side a spout 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 arranged laminar. 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 region an orientation of the mineral fibers 3 which is perpendicular to the large surfaces 22 . 23 is aligned. In zones 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 oscillation of a Bearbei 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 material webs 2 from mineral fibers 3 , such as insulation boards or insulation panels 2 can be further processed, as related 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. Due to the curing of the binder, the secondary web becomes 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.

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 insulating material webs 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 secondary web, which has a width of 2,400 mm 18 is then passed through a circular saw with a circular saw blade 37 divided in the longitudinal direction into four partial webs, each partial web ultimately an insulating material web 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 insulating material webs 22 are lifted from each other and a laminating station 38 fed in the on the separating surfaces 36 the insulating material webs 2 a lamination 39 is applied. The lamination 39 is here for every insulation web 2 as a laminating role 40 stocked, with the lamination 39 with the promotion of insulating material web 2 from the laminating roll 40 subtracted and coextensive with the insulation web 2 is glued. After the laminating station 38 become the insulating material webs 2 wrapped and packed. For this purpose, the insulating material webs 2 in a predetermined length measure of the secondary web 18 by a section perpendicular to the longitudinal direction of the insulating material web 2 cut to length.

The lamination 39 is formed as an air-permeable and heat-resistant nonwoven fabric of glass fibers and forms an outer reinforcing, protective, filtering and decorative layer. The connection of the lamination 39 with the insulating material web 2 in the laminating station 38 done by a on the insulation web 2 sprayed on high-viscosity dispersion adhesive, depending on the required connection between the lamination 39 and the insulation web 2 and its adhesive effect is sprayed over the entire surface, selectively or in strips. The lamination 39 is on the interface 36 the insulation web 2 arranged so that the lamination 39 with the fiber tips at right angles to the interface 36 the insulation web 2 connected is. It may be additionally provided that before winding the insulating material web 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 depart, be removed by cutting or grinding.

Claims (36)

1, Method for producing an insulation sheet of mineral fibers, in particular rockwool and / or glass wool, wherein the mineral fibers are produced from a melt and deposited on a conveyor as a primary web, the primary web stabilized at right angles to its longitudinal extension and deposited as a secondary web on a second conveyor is, the secondary web is then moved so that the mineral fibers substantially a course perpendicular to the large surfaces of the secondary web take and the secondary nonwoven is then divided by a separating cut parallel to the large surfaces of the secondary web in at least two insulating material webs, each having a large surface area and a substantially coextensive, the large surface opposite arranged separating surface, characterized in that at least one the divisions ( 36 ) of the two insulation webs ( 2 ) a lamination ( 39 ) is applied. Method according to claim 1, characterized in that in the large surfaces ( 22 . 23 ) substantially parallel to the large surfaces ( 22 . 23 ) mineral fibers ( 3 ) are removed. Method according to claim 1, characterized in that the insulating material webs ( 2 ) before and / or after the application of the lamination ( 39 ) a hardening furnace ( 30 ), in which one in the primary nonwoven ( 10 ) already cured binder is cured. A method according to claim 1, characterized in that the separating cut for the formation of insulating material webs ( 2 ) in the middle between the large surfaces ( 22 . 23 ) of the secondary web ( 18 ) is performed. Method according to claim 1, characterized in that the lamination ( 39 ) as an 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 in particular in the form of tensile webs is applied. Method according to claim 1, characterized in that the lamination ( 39 ) is applied in several layers, wherein the layers of the lamination ( 39 ) are preferably formed differently. A method according to claim 6, characterized in that the layers of the lamination ( 39 ) are made of fiberglass random webs with layers of nonwoven webs of thermoplastic fibers and / or perforated thermoplastic films. Method according to claim 1, characterized in that the lamination ( 39 ) with the insulation web ( 2 ), wherein the bonding is preferably part-surface, in particular linear and / or punctiform and wherein, for example, hot melt adhesives are used. Method according to claim 1, characterized in that the lamination ( 39 ) is formed as an outer reinforcing, protective, filtering and / or decorative layer. Method according to claim 1, characterized in that the lamination ( 39 ) from a roll ( 40 ) and together with the insulation web ( 2 ) a processing station ( 38 ) is supplied, in which the lamination ( 39 ) with the insulation web ( 2 ) is connected. Method according to claim 10, characterized in that several layers of the lamination ( 39 ) from a roll ( 40 ) subtracted from. A method according to claim 1, characterized in that in the insulating material web ( 2 ) existing binder before the connection with the lamination ( 39 ) are activated by solvents, for example water. Method according to claim 12, characterized in that the activation of the binders takes place by contact rolling. A method according to claim 1, characterized in that the binder on the separation surface ( 36 ) of the insulating web ( 2 ) is sprayed before the lamination ( 39 ) is applied. Method according to claim 1, characterized in that between the insulating material web ( 2 ) and the lamination ( 39 ) a layer of impregnation, in particular of a high-viscosity dispersion adhesive or from a filled with pigments water-silicate plastic adhesive is arranged. A method according to claim 1, characterized in that the impregnation is applied with a high viscosity, so that the impregnation of the lamination ( 39 ) is absorbed. Method according to claim 1, characterized in that the two insulation webs ( 2 ) after application of the laminations ( 39 ) and together a curing oven ( 30 ). A method according to claim 17, characterized in that the insulating material webs ( 2 ) after leaving the curing oven ( 30 ) trimmed in the longitudinal direction, cut to length and wound or divided into individual insulation boards and fed to a packaging device. A method according to claim 1, characterized in that during the separation of the secondary web ( 18 ) in insulation webs ( 2 ) mineral fiber dust formed before the application of the lamination ( 39 ) removed, in particular is sucked off. Method according to claim 5, characterized in that that the film is reinforced with a fiberglass-Gittergelege. A method according to claim 5, characterized in that the aluminum-polyethylene composite film is heated in such a way that the polyethylene layer softens and with mineral fiber tips of the insulating material web ( 2 ) welded. Method according to claim 1, characterized in that the lamination ( 39 ) is formed from different layers. Method according to claim 1, characterized in that the lamination ( 39 ) is made larger in area than the separating surface ( 36 ), so that the lamination ( 39 ) in particular over at least one longitudinal side of the insulating material web ( 2 protruding). Method according to claim 1, characterized in that on the lamination ( 39 ) Markings are arranged, the cutting of the insulation web ( 2 ) serve. Insulating material web of mineral fibers bound with a binder, in particular of mineral wool and / or glass wool, having a large surface area and a separating surface resulting from splitting a secondary nonwoven web into two insulating material webs, the mineral fibers being at right angles to the parting surface and at an angle in the area of the surface deviating from 90 ° to the large surface, in particular running parallel to the large surface, and with a lamination, characterized in that the lamination ( 39 ) on the interface ( 36 ) is arranged. Insulating material web according to claim 25, characterized in that the lamination ( 39 ) as an 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 einla gig and is designed in particular in the form of tensile webs, Insulating material web according to claim 25, characterized in that the lamination ( 39 ) is formed in multiple layers, wherein the layers of the lining are preferably formed differently. Insulating material web according to claim 25, characterized in that the layers of the lamination ( 39 ) are connected to layers of nonwoven thermoplastic fiber webs and / or perforated thermoplastic films. Insulating material web according to claim 25, characterized in that the lamination ( 39 ) with the insulation web ( 2 ), wherein the bond is preferably part of the surface, in particular linear and / or punctiform and designed, for example, with a hot melt adhesive. Insulating material web according to claim 25, characterized in that the lamination ( 39 ) is formed as an outer reinforcing, protective, filtering and / or decorative layer. Insulating material web according to claim 25, characterized in that between the insulating material web ( 2 ) and the lamination ( 39 ) a layer of an impregnation, in particular of a high-viscosity dispersion adhesive or from a filled with pigments water-silicate plastic adhesive is arranged. Insulating material web according to claim 25, characterized in that the impregnation has a high viscosity, so that the impregnation does not depend on the lining ( 39 ) is absorbed. insulating sheet according to claim 26, characterized in that the film with a Fiberglass Gittergelege is reinforced. Insulating material web according to claim 25, characterized in that the lamination ( 39 ) is formed of different layers. Insulating material web according to claim 25, characterized in that the lamination ( 39 ) is made larger in area than the separating surface ( 36 ), so that the lamination ( 39 ) in particular over at least one longitudinal side of the insulating material web ( 2 protruding). Insulating material web according to claim 25, characterized in that on the lamination ( 39 ) Markings are arranged, the cutting of the insulating material web ( 2 ) serve.