EP1616985A1 - Manufacture of a mineral fibre web with substantially upright fibres - Google Patents

Abstract

For the production of a mineral fiber web, for thermal and/or acoustic insulation applications, the web (20) with a setting bonding agent has two surfaces (22,24) with the fibers overwhelmingly aligned in the production direction (26). The web is folded into serpentine pleats and one edge is cut parallel to one of the surfaces so that the mineral fibers are aligned at right angles to the newly-formed secondary surface, and the severed edges (50,52) are separated before the compressed web enters the kiln (62) where the bonding agent is hardened.

Description

The invention relates to a method for producing a mineral fiber product for thermal and / or acoustic insulation, wherein in the direction of production a continuous, provided with a curable binder mineral fiber web is formed with two opposing large surfaces, wherein the mineral fibers of the mineral fiber web are predominantly aligned in the direction of production in that the mineral fiber web is unfolded in the direction of production in such a way that a mineral fiber web, pushed together in a substantially meandering manner, with deflection areas in the two large surfaces is formed.

Mineral fiber products, in particular mineral wool insulation materials in the sense of DIN EN 13162 - "Thermal insulation products for buildings, factory-made products of mineral wool (mineral wool) - Specification" consist of artificially produced glassy solidified mineral fibers which are bound together by means of binders and hydrophobized by additives or dust-binding , The additives are not considered as binders in the strict sense because of their low adhesive forces.

Commercially available glass wool, rock wool and slag wool insulating materials are distinguished. As hybrid insulation materials are referred to those in which the mineral fibers have similar thermal properties as rock wool mineral fibers, but which are molded with the today in the production of glass wool devices commonly used. In terms of process technology, glass and rock wool insulating materials are subsequently distinguished as being characteristic.

The mineral fibers are formed from silicate melts. The small amounts of binders and additives must be distributed as evenly as possible in the mineral fiber mass flow immediately after mineral fiber formation, ie before agglomeration of the mineral fibers. The proportions of the commonly 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. The contents of additives are regularly about 0.2% by mass.

Since the specific power of the fiberizing machines used for the production of glass wool insulating materials is relatively low, several of these devices are arranged one behind the other over a conveyor. The ultimately collected mineral fiber web thus consists of several primary webs.

The melts suitable for the production of stone and slag wool insulating materials are usually processed on so-called cascade fiberizing machines. In order to achieve sufficient cooling of impregnated with binders and additives mineral fibers and simultaneously produce insulating materials with largely homogeneous mineral fiber distribution despite high specific performance of the fiberizing machines or when connecting two machines to a collection chamber, only a very thin primary mineral fiber web is initially formed. This is deposited on an air-permeable conveyor and transported away on this. The primary mineral fiber web is then laid over one another with the aid of a pendulum device over a slower running second conveyor at the desired height and forms the secondary mineral fiber web.

It is possible with this method to enrich already in the collection chamber and / or thereafter, for example, in one or both edge regions of the primary mineral fiber binder or to dope other binders. Thus, the upper and lower outer zones of the secondary mineral fiber web differ 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 at least slightly compressed either only in the vertical direction, but often also in the production direction, in order to achieve a uniform structure of the produced shapes, such as roll-up Dämmfilze, plates or the like. By a largely parallel arrangement of the individual mineral fibers to the two large surfaces of the insulating materials, the thermal conductivity is reduced. At the same time, the tensile strength of the insulating materials tends to increase.

In the production of pressure-resistant or transverse tensile insulating materials for flat roof constructions or thermal insulation composite systems, the mineral fibers are pressed by a pronounced compression of the impregnated mineral fiber web in their longitudinal direction and perpendicular thereto first to thin mineral fiber fins and thereby very strong up and folded together.

The configuration of the mineral fiber web, referred to as longitudinal-height compression, is frequently carried out with the aid of compression devices with roller sets, which are arranged at an acute angle to the conveyor in accordance with the desired degree of compaction. 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 mineral fiber web, which is continuously compressed in various ways, is normally transported from the compression device into a hardening furnace at a subsequently constant rate. Conventional hardening furnaces contain a height-adjustable upper and a lower endless conveying device. In order to transfer high pressures, both consist of attached to chains lamellar elements that are perforated. The impregnated mineral fiber web is compressed in the curing oven to the desired thickness and simultaneously compressed in its longitudinal direction. This largely preserves the structure of the mineral fiber web embossed in front of the hardening furnace. The mineral fibers are pressed into the round or oblong holes and thereby form rounded off from the main surface Surveys. At the same time hot air is sucked in a vertical direction through the permeable mineral fiber web, so that the mineral fiber web is heated sufficiently to vaporize both the residual moisture and discharge as well as the frequently used phenol, formaldehyde, urea resin mixtures to cure largely irreversible.

The longitudinal section of the structures fixed in this way has a plurality of more or less pronounced zones over the height, which usually coincides with the delivery thickness of the above-mentioned insulating materials or their areas of use. This zonal structure is approximately symmetrical with respect to the horizontal center axis. In the two large surfaces, which were directly in contact with the pressure-transmitting lamellar bands in the hardening furnace, the mineral fibers are arranged absolutely parallel to the surfaces, which also applies with regard to the curved elevations. In this zone, depending on the degree of compression about 0.5 mm to about 5 mm deep zone, there is also a slight accumulation of binders. In the underlying zone, the mineral fiber lamellae are often still intertwined with each other, but pressed flat. Only in the central area are the mineral fibers or the mineral fiber lamellae steeply to very steeply to the large surfaces, whereby the thermal conductivity increases relative to the overall structure and also the transverse tensile strength of the mineral fiber product.

The cross section of this reasonably now as insulating material to be designated mass flow is characterized by a horizontal position of the unfolded mineral fiber lamellae. The transverse tensile strength in this direction is about three to five times as high as in the vertical direction. Also pronounced is the significantly higher bending tensile strength in the transverse direction compared to the production direction.

EP 0 741 827 B1 describes a process in which the very thin primary mineral fiber webs, as is generally customary, are suspended to form a now but thin secondary mineral fiber web. 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 on This preformed secondary mineral fiber web 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 one embodiment of the method described in EP 0 741 827 B1, a partial region of the primary mineral fiber web is separated off and processed to form a cover layer, which is subsequently used up on the tertiary mineral fiber web.

It is an object of the present invention to provide an improved method for producing particularly shear-resistant insulation boards with high transverse tensile strength, in which separated layers can be recycled cost-effectively during production of the insulation boards.

The solution to this problem provides a method with the features of claim 1.

According to the method of the invention, a continuous mineral fiber web offset with binders is first of all produced with two large surfaces lying opposite one another, which transports in a production direction and further processed. The mineral fibers of the mineral fiber web are predominantly oriented parallel to the large surfaces in the production direction. Due to this arrangement of mineral fibers, the mineral fiber web at the beginning of the process according to the invention has a relatively low thermal conductivity and increased tensile strength.

The mineral fiber web thus produced can then be compressed more or less strongly in a predetermined direction in order to produce a more uniform structure and to increase the density of the mineral fiber web.

Further, prior to curing, the mineral fiber web may be folded in a direction transverse to the direction of production to adjust the orientation of the mineral fibers in the planes parallel to the major surfaces.

According to the invention, the mineral fiber web is subsequently pushed together in the production direction in such a way that a mineral fiber web which is pushed together substantially in a meandering manner is formed. As a result, most of the mineral fibers are no longer arranged in a plane parallel but in a plane substantially perpendicular to the large surfaces of the mineral fiber web, with the individual mineral fibers making 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 are increased in a direction perpendicular to the large surface area. On the other hand, those mineral fibers which are positioned in the deflection regions of the meandering mineral fiber web pushed together are furthermore arranged substantially parallel to the mutually opposite large surfaces of the mineral fiber web. According to the invention, in a further step at least one edge region is separated substantially parallel to one of the two large surfaces, this step taking place before the curing of the binder. With the aid of the separating step according to the invention, the mineral fibers oriented substantially parallel to the large surfaces are removed in the deflection regions of the mineral fiber web pushed together in a meandering manner, whereby the transverse tensile strength of the mineral fiber web can be further increased. The fact that the separation of the at least one edge region takes place before the curing of the binder causes the at least one separated edge region to be continuous Steps can be further processed immediately, since the binder contained in it has not been cured. Melting of the separated edge areas for re-use of the material is therefore not required, which can be saved considerable costs.

The curing of the binder of the remaining mineral fiber web is preferably carried out in a curing oven, during which advantageously substantially no further compression takes place, during which the mineral fibers which are arranged close to the two mutually opposite large surfaces of the mineral fiber web are flattened again. In this way, a further accumulation of binders in and near the large surfaces of the mineral fiber web can be avoided.

If a slight compression during curing, for example due to contact of the mineral fiber web with a conveyor of the curing oven unavoidable, so has a compressed surface zone of the mineral fiber web, which comes during the curing of the binder with a conveyor of the curing oven in contact, only a thickness of less than 1 mm, better still less than 0.5 mm. Such a low surface zone thickness leads to an insignificant reduction in transverse tensile strength. Furthermore, such a surface zone for adhesive and mortar is permeable, whereby the adhesive mounting of the mineral fiber web or the mineral fiber products produced therefrom 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.

Separated edge regions are preferably pressed with increased binder contents or other binders to moldings or particularly highly compressed plates, for example for facade cladding.

The remaining after separation of one or both near-surface edge regions insulating material web has large surfaces in which increases the binder contents or in which other binders are additionally present. The large surfaces can thus differ in strength, appearance, adhesive or mortar or Putzaffinität.

Fig. 1

eine perspektivische Ansicht einer ersten Ausführungsform des erfindungsgemäßen Verfahrens;

Fign. 1A bis 1D

verschiedene vergrößerte Detailansichten einer Mineralfaserbahn in unterschiedlichen Verfahrensstadien der in Fig. 1 dargestellten ersten Ausführungsform des erfindungsgemäßen Verfahrens;

Fig. 2

eine perspektivische Ansicht einer zweiten Ausführungsform des erfindungsgemäßen Verfahrens;

Fign. 2A und 2B

zwei vergrößerte Detailansichten einer Mineralfaserbahn in unterschiedlichen Verfahrensstadien der in Fig. 2 dargestellten Ausführungsform des erfindungsgemäßen Verfahrens und

Fig. 2C

eine vergrößerte Querschnittansicht entlang der Linie 2C-2C in Fig.2.

Hereinafter, various embodiments of the method according to the invention will be described in more detail with reference to the drawing. Show:

Fig. 1

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

FIGS. 1A to 1D

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

Fig. 2

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

FIGS. 2A and 2B

two enlarged detail views of a mineral fiber web in different stages of the method shown in FIG. 2 embodiment of the method according to the invention and

Fig. 2C

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

Like reference numerals refer to similar components below.

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

The structure of the generated mineral fiber web 20 is shown in more detail in the detail view according to FIG. 1A. The individual mineral fibers form a relatively homogeneous and loose mineral fiber composite, being oriented primarily in the direction of production 26 in planes parallel to the major surfaces 22 and 24.

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

In addition, the conveyor belts 30, 32 of the compression device are oscillating up and down, which is indicated in Fig. 1 by the designated by the reference numeral 34 double arrow and what will be discussed in more detail below.

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

Immediately after the processing station 36, the mineral fiber web 20 is then fed to a further compression device 42 having an upper conveyor belt 44 and a lower conveyor belt 46, which conveyor belts 44, 46 have a relation to the conveyor belts 38, 40 of the processing station 36 lower conveying speed. Accordingly, the mineral fiber web 20 is pushed together in the production direction 26 and compressed, whereby a mineral fiber web 20 is produced with the structure shown in Fig. 1B. 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 region 48 of the mineral fiber web 20, the mineral fibers are aligned substantially perpendicular to the main surfaces 22 and 24, ie transversely to the production direction 26, whereby the central region 48 has a high transverse tensile strength in the direction of the surface normal of the mineral fiber web 20 with high thermal insulation performance. In contrast, in the upper and lower edge regions 50 and 52, that is to say in the deflection regions of the meandering mineral fiber web deposited, the mineral fibers are oriented essentially parallel to the main surfaces 22 and 24 in the production direction 26. The edge regions 50 and 52 thus have a lower transverse tensile strength in the direction of the surface normal of the mineral fiber web 20 than the central region 48.
Referring again to FIG. 1, after leaving the compression device 42, the mineral fiber web is sequentially fed to two separation stations 54 and 56. These separation stations 54 and 56 each comprise two opposing drive wheels 58 with axes of rotation aligned in the direction of production 26, each driving a revolving saw blade 60, with which the upper edge region 50 and the lower edge region 52 of the mineral fiber web 20 are separated. In this way, the mineral fibers of the upper and lower edge regions 50 and 52 arranged in the production direction 26 and parallel to the main surfaces 22 and 24 of the mineral fiber web 20 are for the most part removed, as shown in FIGS. 1C and 1D. By separating these mineral fibers, the Gesamtquerzugfestigkeit and the total thermal insulation performance of the mineral fiber web 20 is increased again.

The separated edge regions 50 and 52, which have a density in the range of 60 kg / m ³ and whose mineral fibers are oriented substantially in the direction of production 26, can now be fed to further processing stations for further processing, which is not shown in FIG.

A produced by separating the edge regions 50 and 52 insulating element 60 consists essentially only of the central region 48 with substantially perpendicular to the main surfaces 22 and 24 and transverse to the production direction 26 aligned mineral fibers. The insulating element 60 is passed after passing through the separation stations 54 and 56 a curing oven 62, in which the or the binder is cured or become. In the hardening furnace 62, the surface zones of the mineral fiber web 60 come into contact with conveying belts (not shown) of a conveying device of the hardening furnace 62, whereby a further slight compression takes place. However, the distance of the conveyor belts of the conveyor of the curing oven 62 is selected 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 60 in the curing oven 62 is only slightly reduced.

An essential advantage of the first embodiment of the method according to the invention shown in FIG. 1 is that the edge regions 50 and 52 of the mineral fiber web 20 are separated before it is fed to the hardening furnace 62. The edge regions 50 and 52 can thus be further processed without problems, for example to insulation boards with a density of over 80 kg / m ³ , to pipe shells with densities of over 80 kg / m ³ , to acoustic ceiling panels, in which a flat storage of mineral fibers is required, to minimize deflections, or to high density moldings.

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

Fig. 2 shows a perspective view of another embodiment of the method according to the invention. As in the case of the method illustrated in FIG. 1, a mineral fiber web 20 is also produced here, which is not shown again in FIG. This mineral fiber web 20 is fed to a pendulum station 64 according to gravity in the vertical direction. The shuttle 64 includes an upper conveyor belt 66 and a lower conveyor belt 68 and can perform a pendulum motion.

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

The mineral fiber web 20 leaves the shuttle 64 in the vertical direction and is deposited on a conveyor belt 70, which then further promotes the mineral fiber web 20 in a horizontal direction. During the laying down of the mineral fiber web 20 on the conveyor belt 70, the shuttle 64 performs a pendulum movement transversely to the conveying direction of the conveyor belt 70, whereby individual sections 72 and 74 of the mineral fiber web 20 are arranged in a zigzag shape so that they overlap at least partially.

A mineral fiber web 80 produced in this way is shown in detail in FIG. 2B and has a structure in which the alignment of the mineral fibers in the mineral fiber web 80 is no longer uniform due to the formation of the sections 72 and 74. The mineral fibers are no longer in the direction of the production direction of the mineral fiber web 80 but transversely to this, but still arranged substantially parallel to the main surfaces 22 and 24.

The mineral fiber web 80 is subsequently moved on to a compression device 28, that of the compression device 28 shown in FIG equivalent. In the compression device 28, the mineral fiber composite of the mineral fiber web 80 is compacted by a predetermined amount at right angles to its major surfaces, the orientation of the mineral fibers shown in FIG. 2B remaining 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, which is indicated in Fig. 2 by the designated by the reference numeral 34 double arrow.

After leaving the compression device 28, the now compacted mineral fiber web 80 is fed to a further processing station 36, which corresponds to the processing station 36 shown in FIG. The conveyor belts 38 and 40 of the processing station 36 again have a lower conveying speed than the conveyor belts 30 and 32 of the compression device 28, so that the mineral fiber web 80 is folded meandering upon its entry into the processing station 36 and pushed together in the production direction.

Immediately after the processing station 36, the mineral fiber web 80 is then fed to another compression device 42 as in the embodiment described with reference to FIG. 1 and compressed there in the production direction, whereby a mineral fiber web 80 having the cross section illustrated in FIG. 2C is produced. 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 region 82 of the mineral fiber web 80, the mineral fibers are aligned at a steep to very steep angle to their major surfaces and transversely to the production direction, whereby the central region 82 has a high transverse tensile strength with relatively high thermal insulation performance. In contrast, in the upper and lower edge regions 84 and 86, ie in the deflection regions of the meandering folded mineral fiber web 80, the mineral fibers are oriented essentially parallel to their main surfaces and transversely to the production direction. The edge regions 50 and 52 thus have a lower transverse tensile strength than the central region 82.

Referring again to FIG. 2, after exiting the compression device 42 as in the first embodiment of FIG. 1, the mineral fiber web 80 is sequentially fed to two separation stations 54 and 56 which sever the upper edge region 84 and the lower edge region 86 of the mineral fiber web 80. 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 regions 84 and 86 are largely removed, which is not shown here. By separating these mineral fibers, the total transverse tensile strength and the total thermal insulation performance of the mineral fiber web 80 is increased again.

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

A mineral fiber web produced by separating the edge regions 84 and 86, which essentially consists only of the central region 82, is passed, after passing through the separation stations 54 and 56, to a hardening furnace 62 in which the binder (s) are / are hardened. In the hardening furnace 62, the surface zones of the mineral fiber web come into contact with conveying belts, not shown, of a conveying device of the hardening furnace 62, whereby a further slight compression takes place. However, the distance of the conveyor belts of the conveyor of the curing oven 62 is again selected so 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 is only slightly reduced.

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

LIST OF REFERENCE NUMBERS

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 edge area

52

lower edge 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 edge area

86

lower edge area

Claims (12)

Method for producing a mineral fiber product for heat and / or sound insulation, comprising the steps of: Producing a mineral fiber web (20), which is continuous in the production direction and provided with a hardenable binder, with two large surfaces (22, 24) lying opposite one another, the mineral fibers of the mineral fiber web (20) being predominantly oriented in the direction of production, Unfolding the mineral fiber web (20) in the production direction in such a way that a substantially meandering compressed mineral fiber web with deflection areas is formed 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 are oriented at right angles to the secondary large surfaces in the region of the secondary large surfaces formed after separation of the edge region; subsequent curing of the binder. The method of claim 1, wherein the mineral fiber web (20) is compressed in one direction prior to curing of the binder. Method according to one of the preceding claims, wherein the mineral fiber web (20) is folded in a direction transverse to the production direction prior to curing of the binder. Method according to one of the preceding claims, wherein the separation of the at least one edge region takes place immediately before the curing of the binder. Method according to one of the preceding claims, wherein the curing of the binder takes place in a hardening furnace (62). A method according to any one of the preceding claims, wherein the curing of the binder occurs without substantial further compression of the mineral fiber product in the tempering furnace (62). A method according to any one of the preceding claims, wherein a surface zone of the mineral fiber product which contacts a conveyor in the hardening furnace (62) during curing of the binder has a thickness of less than 1.0 mm, more preferably less than 0.5 mm is formed 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 which the at least one separated edge region is further processed into acoustic ceiling panels. Method according to one of the preceding claims, in which the at least one separated edge region is further processed into shaped bodies. The method of claim 11, wherein the at least one separated edge region has an increased binder content.

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