DE102005026656A1 - Production of a mineral fiber web with largely upright mineral fibers and use of the resulting waste - Google Patents

Abstract

A method of making a mineral fiber web comprising the steps of: DOLLAR A producing a mineral fiber web having a two-facing major surface which is continuous in the production direction, the mineral fibers of the mineral fiber web being predominantly oriented in the direction of production, pushing together the mineral fiber web in the production direction, in that a mineral fiber web which is pushed together essentially in the form of a concertina, separates at least one edge region essentially parallel to one of the two main surfaces and subsequent curing of the binder.

Description

The The invention relates to a process for producing a mineral fiber product for the Heat and / or Sound insulation, in the direction of production a continuous, with a curable binder provided mineral fiber web with two opposite ones huge Surfaces formed becomes, whereby the mineral fibers of the mineral fiber web prevail oriented in the direction of production, the mineral fiber web in Production direction is unfolded such that a substantially meandering collapsed mineral fiber web with deflection areas in the two big ones surfaces arises.

Mineral fiber products, especially mineral wool insulation materials in the sense of DIN EN 13162 - "Thermal insulation materials for buildings; Factory made Products made of mineral wool (mineral wool) - Specification "consist of artificial produced glassy solidified mineral fibers by means of binder interconnected and hydrophobed by additives or are dust-binding. The additives are considered because of their low adhesive forces not as a binder in the true sense.

Become commercially usual Glaswolle-, rock wool and slag wool insulation materials distinguished. When Hybrid insulation materials are referred to those in which the mineral fibers are similar have thermal properties such as rock wool mineral fibers, but with formed in the manufacture of glass wool today common devices. From a process point of view, glass and rock wool insulation materials will be used below distinguished as characteristic.

The Mineral fibers are formed from silicate melts. The small one Quantities of binders and additives must be available immediately after mineral fiber formation, this means before agglomerations of the mineral fibers as evenly as possible in the Mineral fiber mass flow are distributed. The proportions of the usually used organic binders are about 6 to about 10 Mass% in the glass wool and about 2 to about 4.5 mass% in the stone and slag wool insulation materials. The contents of additives are regularly about 0.2% by mass.

There the specific power of for the production of glass wool insulating materials Used shredding machines is relatively low, several these devices arranged one behind the other over a conveyor. The ultimately collected mineral fiber web thus consists of several primary Tracks.

The for the Production of rock and slag wool insulating materials suitable melts are mostly processed on so-called cascade shredding machines. Around despite high specific performance of the shredding machines or at the connection of two machines on a collection chamber sufficient cooling reach the impregnated with binders and additives mineral fibers and at the same time insulating materials to produce with largely homogeneous mineral fiber distribution is first only one possible thin primary mineral fiber web educated. This is stored on an air-permeable conveyor and transported away on this. The primary mineral fiber web is then with Help a pendulum device across a slower running second conveyor in the desired Height superimposed and forms the secondary Mineral fiber web.

It is possible with this method already in the collection chamber and / or thereafter, for example, in one or both edge regions of the primary mineral fiber binder to enrich or to dope other binders. Make a difference the upper and lower outer zones the secondary Mineral fiber web accordingly.

The impregnated mineral fiber webs collected in the manufacture of glass, stone and slag wool for the production of the insulating materials initially form a loose pile of debris. The process-dependent and material-dependent minimum gross densities are less than 10 kg / m ³ for glass wool webs, and in the case of stone and slag wool only on account of their contents of non-fibrous constituents of the order of magnitude of 18 to 23 kg / m ³ .

The impregnated Mineral fiber webs are then either only in vertical Direction, but often also in the production direction, at least slightly compressed to a uniform structure produced molds, such as roll-up insulating felts, Plates or the like to achieve. By a largely parallel Arrangement of the individual mineral fibers to the two large surfaces of the insulation materials becomes the thermal conductivity reduced. At the same time, the tensile strength of the insulating materials increases tends to.

at the production of insulating materials which can be loaded on pressure or on transverse tension for flat roof constructions or thermal insulation composite systems the mineral fibers are impregnated by a pronounced compression of the Mineral fiber web in its longitudinal direction and at right angles to it first too thin Mineral fiber lamellae pressed together and very strong and folded together.

The designation of the mineral fiber web called longitudinal-height compression is frequent with the help of compression devices with roller sets, which are arranged according to the desired degree of compaction at an acute angle to the conveyor. The arrangement of the rollers to each other and their different peripheral speeds required for the build-ups and convolutions are transmitted largely symmetrically from outside to inside. In special forms, the roller sets of the compression device are divided in order to make different configurations over the width of the conveyor can.

The in various ways continuously compressed mineral fiber web is usually coming from the upsetting device with then consistent Speed in a hardening oven transported. usual Hardening furnaces included one in height adjustable upper and lower each endless conveyor. To transfer high pressures to be able to both consist of lamellar elements attached to chains, which are punched. The impregnated Mineral fiber web is in hardening furnace to the desired Thick compressed and simultaneously in their longitudinal direction compressed. This leaves the structure in front of the hardening furnace Mineral fiber web largely preserved. The mineral fibers are included pressed into the round or oblong holes and make up by it the main surface rounded elevations. At the same time, hot air is in the vertical direction Suctioned through the permeable mineral fiber web, leaving the mineral fiber web sufficiently heated is used to vaporize and discharge both the residual moisture as well the common used phenol, formaldehyde, urea resin mixtures largely cure irreversibly.

Of the longitudinal section the fixed in this way structures over the height, which usually with the Delivery thickness of the above-mentioned insulating materials or their areas of use, several more or less pronounced Zones on. This zonary construction is in relation to the horizontal Central axis approximately symmetrical. In the two major surfaces, the directly in contact with the pressure transmitting lamellar bands in the curing oven the mineral fibers are arranged absolutely parallel to the surfaces, what else? also with regard to the arched ones Surveys applies. In this depending on the degree of compression about 0.5 mm to to about 5 mm deep zone there is also a slight enrichment of binders. In the zone below are the mineral fiber lamellas often still intensely interwoven, but pressed flat. First in the central area lie the mineral fibers or the mineral fiber lamellae steep to very steep to the big ones Surfaces, whereby the thermal conductivity relative to the overall structure and also the transverse tensile strength of the mineral fiber product increases.

Of the Cross section of this reasonably now as Dämmstoffbahn to be designated mass flow is unfolded by a horizontal position of the Mineral fiber lamellae marked. The transverse tensile strength is in this direction about three to five times as high as in the vertical direction. It is also pronounced in the transverse direction opposite the Production direction significantly higher Flexural strength.

The EP 0 741 827 B1 describes a method in which the thinnest possible primary mineral fiber webs are commuted to a now but only thin secondary mineral fiber web, as is generally customary. This is then pushed together with a conveyor such that the individual layers of the secondary mineral fiber web are arranged meandering. The deflections of the individual meanders are clearly marked, with more or less deep gussets between these deflections. The secondary mineral fiber web preformed in this way is then further compressed in the horizontal as well as in the vertical direction, so that a tertiary mineral fiber web formed therefrom has bulk densities of more than 60 kg / m ³ . The binder of the thus compressed tertiary mineral fiber web is then cured in a hardening furnace and thereby vertically compressed and optionally profiled, as described above. In a longitudinal section parallel to the direction of production, this results in pronounced zonal differences in the arrangement of the mineral fibers. On both large surfaces, the profiles are found with the already described orientation of the mineral fibers in and immediately below the large surfaces. The deflection areas of the individual meanders are either pressed only flat, wherein the mineral fibers are again arranged parallel or flat inclined to the large surfaces, or often folded, the folds tip over in extreme cases forward and / or the apex of the meander generated by the deflection after bent down and bent between the arranged in the core area at right angles or almost perpendicular to the large surfaces mineral fiber fins. Frequently, the gaps between the meanders of the individual mineral fiber lamellae are clearly visible in the large surfaces.

According to an embodiment of the in the EP 0 741 827 B1 described method, a portion of the primary mineral fiber web is separated and processed into a cover layer, which is then used up on the tertiary mineral fiber web.

It is an A u fa g a b e of the present invention, an improved Method for producing particularly shear-resistant insulating boards to provide high transverse tensile strength, during which Production of insulation boards separated layers cost-effective can be recycled.

The L ö s u n g this task sees a method with the features of claim 1 before.

According to the inventive method is first a continuous mineral fiber web mixed with binders with two opposite ones huge surfaces generated transported in a production direction and further processed becomes. The mineral fibers of the mineral fiber web are predominant parallel to the big ones surfaces aligned in the direction of production. Due to this arrangement of Mineral fibers, the mineral fiber web at the beginning of the process according to the invention a relatively small one thermal conductivity and an increased Tensile strength on.

The mineral fiber web thus produced can subsequently be in a predetermined Direction more or less compressed to a more uniform structure to generate and increase the density of the mineral fiber web.

Further The mineral fiber web can be transverse in one direction before curing folded to the direction of production, the orientation of the Adjust mineral fibers in the planes parallel to the major surfaces.

According to the invention Mineral fiber web subsequently pushed together in the direction of production such that a substantially meandering pushed together mineral fiber web arises. This leads to, that much the mineral fibers are no longer parallel in one plane, but in a plane substantially perpendicular to the large surfaces of the Mineral fiber web is arranged, with the individual mineral fibers take a steep to very steep angle to the plane of the large surfaces. Thus, both the transverse tensile strength and the thermal conductivity of the Mineral fiber web increases in a direction perpendicular to the large surface. Those Mineral fibers that pushed together in the deflection of the meandering Mineral fiber web are positioned, however, are still substantially parallel to the opposite ones large surfaces of the Mineral fiber web arranged. According to the invention is now in another Step at least one edge region substantially parallel to one the two big ones surfaces separated, this step takes place before the curing of the binder. With the help of the separation step according to the invention become the mineral fibers aligned substantially parallel to the large surfaces meandering in the deflection areas pushed together mineral fiber web, whereby the transverse tensile strength the mineral fiber web can be increased again. The fact, in that the separation of the at least one edge region before hardening of the Binder takes place leads in that the at least one separated edge region comprises closing steps can be further processed directly, since the contained in it Binder not yet cured has been. A melting of the separated edge areas for renewed Recycling of the material is therefore not required, resulting in significant Costs can be saved.

The Harden the binder of the remaining mineral fiber web is preferably carried out in a hardening oven, while during of curing advantageously substantially no further compression takes place by the mineral fibers that are near the two opposite ones huge surfaces the mineral fiber web are arranged to be flattened again. In this way, also a further enrichment of binders in and near the big ones surfaces the mineral fiber web are avoided.

Should a minor one Compression during the curing for example, due to a contact of the mineral fiber web with a conveyor of the curing oven unavoidable, so has a compressed surface zone the mineral fiber web that during of curing the binder with a conveyor of the curing oven in Contact comes, only a thickness of less than 1 mm, better still less than 0.5 mm. Such a low surface zone thickness leads to a only insignificant reduction in transverse tensile strength. Further is such a surface zone for adhesives and mortar permeable, whereby the adhesive mounting of the mineral fiber web or the thereof produced mineral fiber products can be facilitated.

The at least one separated edge region is preferably further processed according to the invention into insulation boards with a gross density of more than 80 kg / m ³ . It can also be used optionally for winding pipe shells with gross densities in excess of 80 kg / m ³ and for acoustic cover plates, where a flat storage of mineral fibers is required to keep the deflections low, or be processed into moldings.

Prefers are separated edge areas with increased binder contents or other binders to moldings or particularly high-density panels, for example for facade cladding pressed.

The after separation of one or both near-surface edge areas remaining insulating sheet has big ones surfaces in which the binder contents are increased or in which other binders additionally available. The big ones surfaces can thus differ in strength, appearance, adhesive or mortar or Putz affinity.

following be different embodiments the method according to the invention described in more detail with reference to the drawing.

In this demonstrate:

1 a perspective view of a first embodiment of the method according to the invention;

1A to 1D various enlarged detail views of a mineral fiber web in different stages of the process in 1 illustrated first embodiment of the method according to the invention;

2 a perspective view of a second embodiment of the method according to the invention;

2A and 2 B Two enlarged detail views of a mineral fiber web in different process stages of the 2 illustrated embodiment of the method according to the invention and

2C an enlarged cross-sectional view taken along the line 2C-2C in 2 ,

Same Reference numerals refer to similar components below.

1 shows a perspective view of a first embodiment of the method according to the invention. In an oven 10 becomes a mineral fiber melt 12 generated by a spout 14 the oven 10 leaves. The the oven 10 leaving mineral fiber melt 12 is under the influence of gravity one or more rapidly rotating wheels 16 in the radial direction of the wheels 16 supplied and due to the high peripheral speed of the wheels 16 torn apart and in the direction of a conveyor belt 18 spun. At the same time, the melt is on its way to the conveyor belt 18 in a direction substantially parallel to the axis of rotation of the wheels 16 fed a cooling gas stream with binding and / or impregnating agents, so that the melt cools to individual mineral fibers, which on the conveyor belt 18 meet, there to a mineral fiber web 20 agglomerate and then to a second conveyor belt 19 be transported further. The mineral fiber web 20 is relatively homogeneous and comprises two opposing major surfaces 22 and 24 , The second conveyor belt 19 promotes the mineral fiber web 20 then continue in a longitudinal or production direction, the in 1 by one with the reference number 26 designated arrow is marked.

The structure of the generated mineral fiber web 20 is in the detail view according to 1A shown in more detail. The individual mineral fibers form a relatively homogeneous and loose mineral fiber composite, where they mainly in the production direction 26 in planes parallel to the main surfaces 22 and 24 are aligned.

Referring again to 1 becomes the mineral fiber web 20 further a compression device 28 with an upper conveyor belt 30 and a lower conveyor belt 32 fed. The distance between the two conveyor belts 30 and 32 rejuvenates in the direction of production 26 so that the mineral fiber web 20 on her way through the compression device 28 gradually compressed. Accordingly, the mineral fiber composite of mineral fiber web 20 compacted by a predetermined amount, the in 1A shown alignment of the mineral fibers remains virtually unchanged during this compression.

In addition, the conveyor belts 30 . 32 the compression device oscillates up and down, which in 1 by the one with the reference number 34 designated double arrow is indicated and what will be discussed in more detail below.

After leaving the compression device 28 becomes the now compacted mineral fiber web 20 another processing station 36 fed, which is also an upper conveyor belt 38 and a lower conveyor belt 40 includes. The conveyor belts 38 and 40 the processing station 36 have a lower conveying speed than the conveyor belts 30 and 32 the compression device 28 on. This lower conveying speed leads together with the pendulum movement of the conveyor belts 30 . 32 the compression device 28 to that the mineral fiber web 20 on her entry to the processing station 36 folded meandering and at the same time in the direction of production 26 is pushed together, so a first compression and thus increasing the bulk density in the production direction 26 is listed.

Immediately after the processing station 36 becomes the mineral fiber web 20 then another compression device 42 fed, which is an upper conveyor belt 44 and a lower conveyor belt 46 which has conveyor belts 44 . 46 one opposite the conveyor belts 38 . 40 the processing station 36 have lower conveying speed. Accordingly, the mineral fiber web 20 in production direction 26 pushed together and compressed, creating a mineral fiber web 20 with the in 1B shown structure is generated. The meandering folded and compressed mineral fiber web 20 now has a density in the range of, for example, 60 kg / m ³ . In a middle area 48 the mineral fiber web 20 the mineral fibers are substantially perpendicular to the major surfaces 22 and 24 , ie across the production direction 26 aligned, reducing the mean range 48 a high transverse tensile strength in the direction of the surface normal of the mineral fiber web 20 having high thermal insulation performance. In the upper and lower edge area 50 and 52 , that is, in the deflection of the meandering deposited mineral fiber web, the mineral fibers, however, are substantially parallel to the main surfaces 22 and 24 in production direction 26 aligned. The border areas 50 and 52 thus have a lower transverse tensile strength in the direction of the surface normal of the mineral fiber web 20 as the middle area 48 on.

Referring again to 1 becomes the mineral fiber web after leaving the compression device 42 two separation stations in succession 54 and 56 fed. These separation stations 54 and 56 each comprise two opposite drive wheels 58 with in production direction 26 aligned rotary axes, each a revolving saw blade 60 drive, with which the upper edge area 50 and the lower edge area 52 the mineral fiber track 20 be separated. In this way, the in production direction 26 and parallel to the main surfaces 22 and 24 the mineral fiber web 20 arranged mineral fibers of the upper and lower edge area 50 and 52 mostly what is in the 1C and 1D is shown. By separating these mineral fibers, the Gesamtquerzugfestigkeit and the total thermal insulation performance of the mineral fiber web 20 increased again.

The separated edge areas 50 and 52 having a density in the range of 60 kg / m ³ and their mineral fibers substantially in the production direction 26 can now be fed to further processing stations for further processing, which in 1 not shown.

A by separating the edge areas 50 and 52 generated insulating element 60 consists essentially only of the middle range 48 with substantially perpendicular to the major surfaces 22 and 24 and across the production line 26 aligned mineral fibers. The insulating element 60 is after passing the separation stations 54 and 56 a curing oven 62 supplied in which the or the binder is cured or become. In the curing oven 62 come the surface zones of the mineral fiber web 60 with conveyor belts, not shown, a conveyor of the curing oven 62 in contact, whereby a further slight compression takes place. The distance of the conveyor belts of the conveyor of the curing oven 62 however, it is chosen such that the thickness of the surface zone undergoing compression is less than 1.0 mm, more preferably less than 0.5 mm. In this way, the transverse tensile strength of the mineral fiber web becomes 60 in the curing oven 62 only slightly reduced.

A major advantage of in 1 shown first embodiment of the method according to the invention is that the edge regions 50 and 52 the mineral fiber web 20 be separated before this the curing oven 62 is supplied. The border areas 50 and 52 can thus be easily processed, for example, to insulation boards with a density of about 80 kg / m ³ , to pipe shells with densities of about 80 kg / m ³ , to acoustic ceiling panels in which a flat storage of mineral fibers is required to keep deflections low , or to high density moldings.

The border areas 50 and 52 , which have an increased binder content or other binders, are further preferably pressed into moldings or particularly highly compressed plates, for example for facade cladding.

2 shows a perspective view of another embodiment of the method according to the invention. As with the in 1 also shown here is a mineral fiber web 20 produces what is in 2 but not shown again. This mineral fiber web 20 becomes a shuttle station 64 following gravity fed in the vertical direction. The shuttle station 64 includes an upper conveyor belt 66 and a lower conveyor belt 68 and can perform a pendulum motion.

The structure of the shuttle station 64 fed mineral fiber web 20 is in 2A represented and corresponds essentially to in 1A shown structure. The individual mineral fibers are in the production direction, and substantially parallel to the major surfaces 22 and 24 the mineral fiber web 20 arranged.

The mineral fiber web 20 leaves the shuttle station 64 in the vertical direction and is on a conveyor belt 70 filed that the mineral fiber web 20 then further in a horizontal direction promotes. While depositing the mineral fiber web 20 on the conveyor belt 70 leads the shuttle station 64 a pendulum movement transverse to the conveying direction of the conveyor belt 70 out, creating individual sections 72 and 74 the mineral fiber web 20 be arranged in a zigzag so that they overlap at least partially.

A mineral fiber web produced in this way 80 is in 2 B shown in detail and has a structure in which the orientation of the mineral fibers in the mineral fiber web 80 through the formation of the sections 72 and 74 is no longer uniform. The mineral fibers are no longer in the direction of the production direction of the mineral fiber web 80 but across it, but still essentially parallel to the major surfaces 22 and 24 arranged.

The mineral fiber web 80 then continues to a compression device 28 moved, the in 1 illustrated compression device 28 equivalent. In the compression device 28 becomes the mineral fiber composite of the mineral fiber web 80 compressed by a predetermined amount in a direction perpendicular to their major surfaces, wherein the in 2 B shown alignment of the mineral fibers remains virtually unchanged during this compression.

The compression device 28 has two conveyor belts 30 and 32 which are variable in their distance and perform a pendulum motion, what in 2 by the one with the reference number 34 indicated double arrow is indicated.

After leaving the compression device 28 becomes the now compacted mineral fiber web 80 another processing station 36 supplied in the 1 represented processing station 36 equivalent. The conveyor belts 38 and 40 the processing station 36 in turn have a lower conveying speed than the conveyor belts 30 and 32 the compression device 28 on, leaving the mineral fiber web 80 on her entry to the processing station 36 folded meandering and pushed together in the production direction.

Immediately after the processing station 36 becomes the mineral fiber web 80 then as with reference to 1 described embodiment of a further compression device 42 fed and compressed there in the production direction, creating a mineral fiber web 80 with the in 2C produced cross-section is generated. The meandering folded and compressed mineral fiber web 80 now has a density in the range of, for example, 60 kg / m ³ . In a middle area 82 the mineral fiber web 80 the mineral fibers are oriented at a steep to very steep angle to their major surfaces and transversely to the direction of production, whereby the central region 82 has a high transverse tensile strength at relatively high thermal insulation performance. In the upper and lower edge area 84 and 86 , So in the deflection of the meandering folded mineral fiber web 80 In contrast, the mineral fibers are aligned substantially parallel to their major surfaces and transversely to the direction of production. The border areas 50 and 52 thus have a lower transverse tensile strength than the middle range 82 on.

Referring again to 2 becomes the mineral fiber web 80 after exiting the compression device 42 as in the first embodiment according to 1 two separation stations in succession 54 and 56 fed to the upper edge area 84 and the lower edge area 86 the mineral fiber web 80 split off. In this way, the parallel to the main surfaces of the mineral fiber web 80 and transverse to the production direction arranged mineral fibers of the upper and lower edge region 84 and 86 mostly removed, which is not shown here. By separating these mineral fibers, the Gesamtquerzugfestigkeit and the total thermal insulation performance of the mineral fiber web 80 increased again.

The separated edge areas 84 and 86 , which by way of example have a density in the range of 60 kg / m ³ , can now be described with reference to FIG 1 already described further processing stations for further processing are supplied, which in 2 not shown in detail.

One by separating the edge areas 84 and 86 produced mineral fiber web, which is essentially only from the middle range 82 exists after passing through the separation stations 54 and 56 a curing oven 62 supplied in which the or the binder is cured or become. In the curing oven 62 come the surface zones of the mineral fiber web with conveyor belts, not shown, a conveyor of the curing oven 62 in contact, whereby a further slight compression takes place. The distance of the conveyor belts of the conveyor of the curing oven 62 Again, however, it is chosen such that the thickness of the surface zone undergoing compression is less than 1.0 mm, more preferably less than 0.5 mm. In this way, the transverse tensile strength of the mineral fiber web in the curing oven 62 only slightly reduced.

The present invention is not limited to the two embodiments described above. There are further modifications possible without departing from the scope defined by the appended claims.

10

oven

12

Mineral melt

14

spout

16

wheel

18

first conveyor belt

19

second conveyor belt

20

Mineral fiber web

22

main area

24

main area

26

arrow

28

pressing station

30

upper conveyor belt

32

lower conveyor belt

34

double arrow

36

processing station

38

upper conveyor belt

40

lower conveyor belt

42

dip station

44

upper conveyor belt

46

lower conveyor belt

48

middle Area

50

upper border area

52

lower border area

54

separating station

56

separating station

58

drive wheel

60

Mineral fiber web

62

curing oven

64

pendulum station

66

upper conveyor belt

68

lower conveyor belt

70

conveyor belt

72

section

74

section

76

production direction

80

Mineral fiber web

82

middle Area

84

upper border area

86

lower border area

Claims (12)

A process for producing a mineral fiber product for thermal and / or acoustic insulation, comprising the steps of: producing a mineral fiber web which is continuous in the production direction and provided with a hardenable binder (US Pat. 20 ) with two opposing large surfaces ( 22 . 24 ), wherein the mineral fibers of the mineral fiber web ( 20 ) are predominantly oriented in the direction of production, unfolding of the mineral fiber web ( 20 ) in the production direction such that a substantially meandering pushed together mineral fiber web with deflection areas in the two large surfaces, separating at least one edge region substantially parallel to one of the two large surfaces ( 22 . 24 ) such that the mineral fibers in the region of the secondary large surfaces formed after separation of the edge region are oriented at right angles to the secondary large surface and subsequent curing of the binder. Process according to Claim 1, in which the mineral fiber web ( 20 ) is compressed in one direction before the curing of the binder. Method according to one of the preceding claims, in which the mineral fiber web ( 20 ) is folded prior to curing of the binder in a direction transverse to the direction of production. Method according to one of the preceding claims, in the separation of the at least one edge region immediately before curing the Binder takes place. Method according to one of the preceding claims, in which the hardening of the binder in a hardening furnace ( 62 ) he follows. Method according to one of the preceding claims, wherein the curing of the binder without substantial further compression of the mineral fiber product in the hardening furnace ( 62 ) he follows. Method according to one of the preceding claims, wherein a surface zone of the mineral fiber product, which during hardening of the binder with a conveyor in the curing oven ( 62 ) is formed with a thickness of less than 1.0 mm, in particular less than 0.5 mm compressed. Method according to one of the preceding claims, in which the at least one separated edge region is further processed into insulation boards with a density of more than 80 kg / m ³ . Method according to one of the preceding claims, in which the at least one separated edge region is used for winding pipe shells with bulk densities of more than 80 kg / m ³ . Method according to one of the preceding claims, in the at least one separated edge area to acoustic ceiling panels is further processed. Method according to one of the preceding claims, in the at least one separated edge region is further processed into shaped bodies becomes. The method of claim 11, wherein the at least a separate edge region has an increased binder content.