CZ179595A3 - Process for producing insulation web from mineral fibers apparatus for producing the web from mineral fibers and insulation board made from mineral fibers - Google Patents

Abstract

A method of producing a mineral fiber-insulating web comprises the steps of firstly producing a first non-wowen mineral fiber web. The first mineral fiber web contains mineral fibers arranged generally in the longitudinal direction of the mineral fiber web. Secondly, the first mineral fiber web is moved in the longitudinal direction of the web and folded parallel with the longitudinal direction and perpendicular to the transversal direction of the first mineral fiber web, so as to produce a second mineral fiber web comprising a central body and opposite surface layers sandwiching the central body, which central body contains mineral fibers arranged generally perpendicular to the longitudinal and transversal directions of the second mineral fiber web and which surface layers contain mineral fibers arranged generally in the transversal direction of the second mineral fiber web. Thirdly, a third non-wowen mineral fiber web being a mineral fiber web of a higher compactness as compared to the second mineral fiber web is produced and adjoin in facial contact with the second mineral fiber web for producing a fourth composite mineral fiber web which is thereupon cured. The method also optionally includes longitudinally compressing and/or transversally compressing the second mineral fiber web. The composite mineral fiber web may additionally be combined with additional mineral fiber webs or coverings for producing a composite mineral fiber web product which is cured in a single curing process.

Description

A method for producing a mineral fiber insulating web and a mineral fiber insulating board and a mineral fiber insulating board

Technical field

The present invention generally relates to the technical field of manufacturing mineral fiber insulation boards. Mineral fibers generally include fibers such as mineral wool fibers, glass fibers, etc. More specifically, the present invention relates to new techniques for producing mineral fiber insulating webs from which mineral fiber insulation boards are cut. The mineral fiber sheets produced from the mineral fiber insulating web produced by the process of the present invention exhibit advantageous characteristics in both mechanical strength and modulus of elasticity and strength, have low weight and good thermal insulation properties.

BACKGROUND OF THE INVENTION

So far, mineral fiber webs have been produced as homogeneous webs, ie. The webs in which the mineral fibers of which the web is composed are oriented in one predominant orientation, which is mostly determined by the orientation of the production line to which the mineral fiber web is produced and moved during the mineral fiber web production process. The product made from homogeneous mineral fiber webs exhibits characteristics which are determined by the integrity of the mineral fiber insulating web and which are predominantly determined by the bonding of the mineral fibers in the mineral fiber insulating board, made from the mineral fiber insulating web, and predominantly determined by basis weight; mineral fiber density mineral fiber insulation board.

Various techniques have been invented to produce mineral fiber insulation boards, different structures having advantageous characteristics of mineral fiber boards, to some extent always achieved by techniques for producing mineral fiber insulation boards, in which the mineral fibers are oriented in a predominantly orientation that differs from production line orientation, see International Patent Application Publication No. PCT / DK91 / 00383, International Patent Application Publication No. WO92 / 10602, US Patent No. 4950355, Swedish Patent No. 441764, US Patent No. 2546230, and US Patent No. 5,702,030. 3493452. References to the above patent applications and patents and US patents are incorporated herein by reference.

From the above-mentioned published International Patent Application No. WO92 / 10602, a method for producing mineral fiber insulating boards composed of bonded rod-shaped mineral fiber elements is known. The method comprises cutting the continuous mineral fiber web in the longitudinal direction to form the slats, cutting the slats to a desired length, rotating the slats about 90 ° to the longitudinal axis, and joining the slats to form a plate. The method also includes the step of curing a continuous mineral fiber web, or alternatively a plate composed of individual lamella lengths bound together to form a plate.

Swedish patent No. 441764 discloses a technique for making cartons or boards composed of rod-shaped elements, and this technique is similar to the technique described above in said international patent application. According to the technique described in the Swedish patent, the web or mineral fiber material is cut into rod-shaped elements of a specific length, which is then rotated and refolded into a structure of a composite plate of rod-shaped elements which are glued together by strips of binder material holes through the composite rod-shaped structure of the mineral fiber plate in a separate manufacturing step.

U.S. Pat. No. 2546230 discloses techniques for making mineral fiber cartons or boards composed of rod-shaped elements. The technique described in US Patent No. 2546230 is very similar to the techniques described in the above-mentioned International Patent Application and the aforementioned Swedish Patent and involves a separate step of bonding the rod-shaped lamellas together with a suitable binder.

U.S. Pat. No. 3,493,452 discloses a method of making a fibrous plate-like structure comprising continuous fibers or fibers of a polymeric material such as polyethylene terephthalate or polyhexamethylenadenamide. The method comprises producing filaments or fibers of polymeric material by a trolley machine from supplying filaments or fibers of a porous flexible web of filaments or fibers, collecting filaments or fibers of polymeric material on a web to form a continuous web of filaments or fibers of polymeric material, compressing the web, cutting the web into a series of parallel strands of filaments comprising continuous or polymeric fibers, and rotating the fibrous strips about 90 ° along the longitudinal axis and bonding the strips together so that the strips are only homogeneously joined by applying pressure during the rotation process The webs manufactured in accordance with the technique described in said US patent are suitable for the manufacture of products such as carpets, blankets, bedspreads, bathrobes, etc.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a new method of producing mineral fiber insulating webs from which mineral fiber insulating boards can be cut, which method allows online production of mineral fiber insulating boards that are composite and complex structures providing different advantages in compared to homogeneous, one-way oriented mineral fiber plates according to the prior art.

A particular advantage of the present invention is that the new mineral fiber insulating boards of the present invention and produced by the method of the present invention, compared to prior art mineral fiber insulating boards, contain less mineral fibers and consequently are cheaper than mineral fiber insulating boards according to the prior art, and still exhibit advantages compared to the prior art mineral fiber insulation boards in terms of mechanical strength and thermal insulation properties.

A particular feature of the present invention relates to the fact that the new mineral fiber insulating board of the present invention and produced by the method of the present invention is made of less mineral fibers or less material compared to prior art mineral fiber insulating boards and still provides the same characteristics as a mineral fiber insulating board of the prior art in terms of mechanical strength and thermal insulating properties and thus provides a lighter and more compact mineral fiber board as compared to the prior art mineral fiber insulating board, which reduces transport, storage and handling costs.

The above object, the above-mentioned advantages and features together with many other objects, advantages and features will be apparent from the detailed description of the presently preferred embodiments of the present invention set forth below and will be achieved by the method of the invention, comprising the following steps:

a) producing a first non-woven mineral fiber web defined by a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web comprises mineral fibers arranged generally in a second transverse direction and comprises a first a curing binder,

b) moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web,

c) folding the first mineral fiber web parallel to the first longitudinal direction and perpendicular to the second transverse direction so as to obtain a second non-woven mineral fiber web, wherein the second mineral fiber web comprises a central body and opposing surface layers which coat the central a body wherein the central body comprises mineral fibers arranged generally perpendicular to the first longitudinal direction and the second transverse direction and a surface layer comprising the mineral fibers arranged generally in the second transverse direction,

d) movement of the second mineral fiber web in the first longitudinal direction,

e) producing a third non-woven mineral fiber web defined by a third direction parallel to the third mineral fiber web, wherein the third mineral fiber web comprises mineral fibers arranged generally in the third direction and comprising a second curable binder, wherein the third mineral fiber web is mineral fibers of high compactness compared to the second mineral fiber fabric,

f) joining the third mineral fiber web with the second mineral fiber web in face contact with it to form a fourth composite mineral fiber web; and

g) curing the first and second curable binder agents such that the mineral fibers of the fourth composite material are bonded to each other, thereby forming a mineral fiber insulating web.

The third non-woven mineral fiber web that joins the second non-woven mineral fiber web in step f) may form a separate non-woven mineral fiber web. Thus, the first and third mineral fiber webs can be produced in separate production lines which are joined together in step f).

According to a first embodiment of the method of the present invention, the third non-woven mineral fiber web is produced by separating the surface segment of the first mineral fiber web layer and compacting the surface segment of the layer for producing the third mineral fiber web.

Optionally, the third mineral fiber web may be made by densifying the surface segment of the layer, including the steps of composition of the surface segment of the layer, to obtain a third mineral fiber web comprising mineral fibers arranged generally transverse to the longitudinal direction of the third mineral fiber web.

The third mineral fiber web may further be made by densifying the surface segment of the layer, including the steps of composition of the surface segment of the layer, to produce a third mineral fiber web comprising mineral fibers arranged generally transverse to the longitudinal direction of the third mineral fiber web.

According to another presently preferred embodiment of the method of the present invention, the third non-woven mineral fiber web is produced by separating one of the surface layers of the second mineral fiber web in step c) from its central body and compacting the surface layer to produce the third mineral fiber web. Provided that the third mineral fiber web is made by separating the surface layer from the second mineral fiber web, the mineral fibers of the third mineral fiber web generally maintain the mineral fiber direction of the second mineral fiber web, i. orientation generally in the second transverse direction.

The process of the present invention preferably further comprises a further step similar to step e) of making a fifth non-woven mineral fiber web similar to the third mineral fiber nonwoven and the bonding step in step f) of the fifth mineral fiber web with the second mineral fiber nonwoven in face contact with each other. such that the second mineral fiber web is deposited between the third and fifth mineral fiber webs in the fourth mineral fiber web. In the manufacture of the fifth mineral fiber web, an integral composite mineral fiber structure of the fourth mineral fiber web is obtained, the structure wherein the central body originating from the second mineral fiber web is sandwiched between opposed densified surface layers formed by the third and fifth mineral fiber webs. .

The degree of folding the first mineral fiber web is preferably ⁴ performs such that produce continuous ondulation extending in the first longitudinal direction of the first mineral fiber web in order to obtain an accurately structured, folded second mineral fiber web from which the surface (s) layer (s ) easily separates.

With the proviso that the third mineral fiber web is provided as surface layers separate from the second mineral fiber web, the mineral fibers of the third mineral fiber web as discussed above are generally oriented along the second transverse direction. As a result, the third direction may coincide with the first longitudinal direction.

With the proviso that the third non-woven mineral fiber web is produced on a separate production line, the third direction may be in any orientation, eg, be coincident with the first longitudinal direction and consequently be perpendicular to the second transverse direction.

The method of the present invention further preferably comprises the steps of preparing a first mineral fiber web of basic, nonwoven mineral fibers by arranging the mineral fiber web in overlapping x layers such that a more homogeneous and compact mineral fiber web is obtained compared to the mineral fiber web. In addition, it comprises mineral fibers generally oriented along the longitudinal direction of the basic mineral fiber web. In the manufacture of the first mineral fiber web of the base nonwoven mineral fiber web by arranging the base mineral fiber web in overlapping layers, the general orientation of the mineral fibers of the base nonwoven mineral fiber web is shifted in the longitudinal direction of the base mineral fiber web to the transverse direction a first non-woven mineral fiber web. The base, nonwoven mineral fiber web is preferably arranged such that it generally extends into the second transverse direction.

In accordance with the technique described in the aforementioned published International Patent Application no.

PCT / DK91 / 00383, publ. No. WO92 / 10602, the first and second nonwoven mineral fiber webs are preferably subjected to compaction and compression to provide more compact and homogeneous mineral fiber webs. The compaction and compression may be either height compression, longitudinal compression, transverse compression, and combinations thereof. The method of the present invention further preferably comprises the further step of height compressing the first non-woven mineral fiber web produced in step a) and preferably made from a basic non-woven mineral fiber web as described above.

Further preferably, the method of the present invention may comprise a further step of longitudinally compressing the first non-woven mineral fiber web produced in step a) and further or alternatively another step of longitudinally compressing the second nonwoven mineral web produced in step c). By performing longitudinal compression, the mineral fiber web subjected to longitudinal compression is more homogeneous, resulting in an overall improvement in mechanical resistance and, in most cases, thermal insulation properties of the longitudinally compressed mineral fiber web as compared to the longitudinally uncompressed mineral fiber web.

As will be apparent from the detailed description of preferred embodiments of the present invention set forth below, mineral fiber insulating boards made by the method of the present invention exhibiting surprisingly improved mechanical properties and mechanical resistance when the second non-woven mineral fiber web produced in step c) is subjected to transverse compression. wherein the mineral fiber structure of the second non-woven mineral fiber web is homogenized. Transverse compression of the second non-woven mineral fiber web results in a significant improvement in the mechanical properties and efficiency of the final fibrous insulating sheets made of the second non-woven mineral fiber web, and is believed to be a mechanical mineral fiber reduction of the second non-woven mineral fiber web. , when the second nonwoven mineral fiber web is subjected to transverse compression and at this reduction, the mineral fibers of the second nonwoven mineral fiber web are symmetrically distributed in the uncured mineral fiber web.

The method of the present invention may further advantageously comprise the step of applying the film to the side surface of both side surfaces of the first non-woven mineral fiber web and / or applying the film to the side surface or both side surfaces of the second non-woven mineral fiber web. The foil may be a foil of plastic materials, such as an endless foil, a woven or nonwoven web, or alternatively, a foil of non-plastic materials such as paper or fabric. The nonwoven insulating web produced by the method of the present invention may, as discussed above, be provided with two opposites

I arranged mineral fiber webs lining the central body of the composite mineral fiber insulating web.

If the mineral fiber insulating web is produced as a three-layer assembly, one or both of the outer side surfaces may be provided with similar or identical surface coatings.

The method of the present invention may further comprise the further step of compressing the fourth composite mineral fiber web to introduce the fourth composite mineral fiber web into the curing oven. Compression of the fourth mineral fiber composite web may include height compression, longitudinal compression and / or transverse compression. It is believed that by compressing the fourth composite mineral fiber web, the homogeneity of the end product is improved since the compaction of the fourth composite mineral fiber web produces a homogenizing effect on the central body of the fourth composite mineral fiber web, the central body being the central body of the second nonwoven mineral fiber web. fibers.

In order to provide a more homogeneous and compact mineral fiber web that is fed to the curing oven in step g), the method of the invention preferably further comprises an additional step of compacting the fourth composite mineral fiber web before introducing the fourth composite mineral fiber web into the curing oven. By compacting the fourth composite mineral fiber web, the homogeneity of the end product is improved because compaction of the fourth composite mineral fiber web produces a homogenizing effect on the central body of the fourth composite mineral fiber web, wherein the central body is the central body of the second composite mineral fiber web.

Step g) curing the first curable binder and, optionally, the second and third curable binder agents, depends on the nature of the cure binder (s), and will be accomplished in a number of different ways, e.g. such as atmosphere, by exposing the curable binder agent or irradiation agents such as UV irradiation or IR irradiation. When the curable binder or thermosetting binder such as conventional resin-based binder agents are commonly used in the mineral fiber industry, the method of curing the curable agent or agents includes the step of introducing the mineral fiber web to be cured into the curing oven. Accordingly, the curing process is carried out by means of a curing oven. Other alternative curing devices may include IR heaters, microwave heaters, etc.

From the cured mineral fiber insulating web produced in step g), the plate segments are preferably cut by cutting the cured fourth composite mineral fiber web into plate segments in a separate production step.

The aforementioned object, advantages and features along with many other objects, advantages and features are further obtained by means of a device for producing a mineral fiber insulating composite web, comprising:

a) first means for producing a first non-woven mineral fiber web defining a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web is made to include mineral fibers arranged generally in a second transverse direction and comprises a first curable agent,

b) second means for moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web,

c) third means for folding the first mineral fiber web parallel to the first longitudinal direction and perpendicular to the second transverse direction so as to form a second non-woven mineral fiber web comprising a central body and opposing surface layers coating the central body, wherein the central body comprising mineral fibers arranged generally perpendicular to the first longitudinal direction and the second transverse direction and a surface layer comprising mineral fibers arranged generally in the second transverse direction,

d) fourth means for moving the second mineral fiber web in the first longitudinal direction;

e) a fifth means for producing a third non-woven mineral fiber web defining a third direction parallel to the third mineral fiber web, wherein the third mineral fiber web is made to comprise mineral fibers generally arranged in a third direction and comprises a second curable binder; the third mineral fiber web is a mineral fiber web of higher compactness, i.e. compared to the second mineral fiber web,

(f) sixth means for joining the third mineral fiber web to the second mineral fiber web in their face contact to produce a fourth composite mineral fiber web; and

g) seventh means for curing the first and second curable binder agents by binding the mineral fibers of the fourth composite mineral fiber web to each other to form a mineral fiber insulating web.

The apparatus of the present invention may advantageously include any of the above features of the method of the present invention.

In addition, the aforementioned object, the above-mentioned advantage and the above-mentioned features together with many other objects, advantages and features are obtained with the mineral fiber insulation board according to the present invention, wherein said mineral fiber insulation board defines a longitudinal direction and comprises:

a central body comprising mineral fibers, a surface layer comprising mineral fibers, a central body and a surface layer interconnected in face contact, the mineral fibers of the central body being arranged generally perpendicular to the longitudinal direction and perpendicular to the surface layer; in a direction parallel to the longitudinal direction, the surface layer is more compact compared to the central body, and the mineral fibers of the central body and the mineral fibers of the surface layer are bonded to the integral structure only by curing the binders in a single curing process and initially present in uncured, nonwoven webs mineral fibers from which the central body and the surface layer are produced.

The mineral fiber insulating plate according to the present invention preferably comprises opposing surface layers of the same structure, coating the central body into the integral structure of the mineral fiber insulating plate.

Description of the figures in the attached drawings

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will now be described in more detail with reference to the drawings in which: Figure 1 is a schematic and perspective view illustrating a first manufacturing step of manufacturing a mineral fiber insulating web from a mineral fiber melt; 3,4,5 and 6 are schematic and perspective views illustrating four alternative techniques for folding a mineral fiber insulating web, parallel to the longitudinal direction of the mineral fiber insulating web, FIG. 7 is a schematic and perspective view illustrating a manufacturing step of separating the surface layer of a composite mineral fiber insulating web produced according to the techniques described in Figs. 3-6, and a manufacturing step of compacting the surface layer; Fig. 8 is a schematic and perspective view illustrating a manufacturing step of transverse compression 7, FIG. 9 is a schematic and perspective view illustrating a manufacturing step of bonding a surface layer, preferably a compacted surface layer, to a mineral fiber insulating web, or preferably to the remainder of the insulating web 3-6 and from which the surface layer has been separated according to the technique described in FIG. 7, FIG. 10 is a schematic and perspective view illustrating the manufacturing step of curing a mineral fiber insulating web. and a manufacturing step of splitting the hardened mineral fiber web into plate segments, FIG. 11 is a schematic and perspective view illustrating a pleated mineral fiber web produced by the techniques described in FIGS. 3-6; FIG. 12 is a schematic and perspective view illustrating first embodiment of the insulation segment 1-10 is a schematic and perspective view illustrating a second embodiment of a segment of a mineral fiber insulating plate manufactured according to the techniques described in FIGS. 1-10, FIG. 14. and 15 are diagrams illustrating manufacturing parameters in an online manufacturing facility producing generally constructed mineral fiber insulation webs produced in accordance with the techniques of the present invention; and FIGS. 16 and 17 are diagrams similar to the diagrams of FIGS. 14 and 15 illustrating manufacturing parameters. on an online manufacturing plant producing mineral fiber roof thermal insulation boards of mineral fiber insulating web produced in accordance with the techniques of the present invention.

FIG. 1 shows the first step of manufacturing a mineral fiber insulating web. The first stage involves the formation of mineral fibers from the melt-forming mineral fiber produced in the furnace 30 and which is supplied from the furnace outlet 32 to all four fast-spinning spinning wheels 34 on which the melt-forming mineral fibers are supplied as stream 36 melt forming the mineral fiber. The melt stream 36 forming the mineral fiber is supplied to the spinning wheels 34 in a radial direction to the wheels and is simultaneously supplied to the rapidly rotating wheels 34 in an axial direction thereto a cooling gas stream causing the formation of individual mineral fibers which are ejected or sprayed from the spinning spinning wheels 34 as indicated by 38. The mineral fiber spray 38 is collected on a continuously operating first conveyor belt 42 to form a primary mineral fiber insulating web 40. The thermosetting binder is also added to the primary mineral fiber insulating web 40 either directly to the mineral fiber insulating web 40 or at the stage of expulsion of the mineral fibers from the spinning wheels 34, i. at the stage of formation of individual mineral fibers. As shown in FIG. 1, the first conveyor belt 42 is comprised of two sections of the conveyor belt. The first section of the conveyor belt is inclined with respect to the horizontal direction and with respect to the second substantially horizontal section of the conveyor belt. The first section comprises a collector section, while the second section comprises a conveyor section by which the mineral fiber insulating web 40 is conveyed to the second and third continuously operating conveyor belts designated 44 and 46, which operate synchronously with the first conveyor belt 42 and laminate / sandwich. a primary mineral fiber insulating web 40 between two attached surfaces of the second and third conveyor belts 44 and 46.

The second and third conveyor belts 44 and 46 are in communication with the fourth conveyor belt 48, which forms a collector conveyor belt on which the second mineral fiber insulating web 50 is collected as the second and third conveyor belts 44 and 46 move over the upper surface. of the fourth conveyor belt 48 transversely with respect to the fourth conveyor belt 48. The second mineral fiber insulating web 50 is then produced by arranging the primary mineral fiber insulating web 40 in an overlap generally transverse to the fourth conveyor belt 48.

In the manufacture of the secondary mineral fiber web 50 from the primary mineral fiber web 40 as described in FIG. 1, a more homogeneous secondary mineral fiber web 50 is obtained compared to the less homogeneous primary mineral fiber web.

Mostly, the mineral fiber orientation of the primary mineral fiber insulating web 40 is parallel to the longitudinal direction of the web 40 and the conveying direction of the first conveyor belt 42. Conversely, the primary mineral fiber orientation of the second mineral fiber web 50 is substantially perpendicular to the primary mineral fiber web 40. and transverse to the longitudinal direction of the second mineral fiber insulating web 50 and the conveying direction of the fourth conveyor belt 48.

FIG. 2 shows a site for compacting and homogenizing the entrance of the mineral fiber insulating web 50 ', which site serves to compact and homogenize the incoming mineral fiber web 50 ' for producing a protruding mineral fiber web 50 ' the mineral fiber web 50 is denser and more homogeneous compared to the incoming insulating web 50'7. mineral fiber. The inlet of the mineral fiber insulating web 50 'may be a mineral fiber insulating web 50 produced at the location shown in FIG.

1.

The compaction site comprises two sections. The first section comprises two conveyor belts 52 and 54, which are arranged on the upper side surface and the lower side surface of the mineral fiber web 50 '. The first section essentially comprises a section in which the mineral fiber web 50 'entering the section is subjected to high pressure to reduce the overall height of the mineral fiber web and to compact the mineral fiber web. Consequently, the conveyor belts 52 and 54 are arranged to slope from the inlet end on the left side of Figure 2, where the inlet of the mineral fiber web 50 'is into the first section, towards the outlet end from which the highly compressed web is The mineral fiber is delivered to the second section of the compaction site.

The second section of the compaction site comprises three sets of rollers 56y and 58 ', 56 and 58, and 56' and 58 '. The rollers 56 ', 56' are arranged on the top side of the web surface while the rollers 58 ', 58 and 58' are arranged on the bottom side of the mineral fiber web. The second section of the compaction site provides longitudinal compression of the mineral fiber web and this longitudinal compression produces homogenization of the mineral fiber web by rearranging the mineral fibers of the mineral fiber web compared to the initial structure to a more homogeneous structure. The three sets of rollers 56 'and 58', 56 and 58 and 56 'and 58' of the second section rotate at the same rotational speed, but less than the rotational speed of the first section conveyor belts 52 and 54, causing longitudinal compression of the mineral fiber web. The height-compressed and longitudinally compressed mineral fiber web extends from the compaction site shown in FIG. 2, designated 50.

It will be appreciated that the combined height and longitudinal compaction site shown in Figure 2 may be modified by omitting one or two sections, i.e., the first section forming the height compression section, or alternatively the second section forming the longitudinal compression section. When one or two sections of the compaction site shown in Fig. 2 are omitted, the compaction section performs a single compaction or compression, and becomes a site of height compression or alternatively longitudinal compression. Although the height compression section has been described as comprising conveyor belts and the longitudinal compression section has been described as comprising rollers, both sections can be made using belts or rollers. Also, the height compression can be accomplished by means of rollers and the longitudinal compression section can be provided with conveyor belts.

Figures 3,4,5 and 6 show four alternative techniques for folding a mineral fiber insulating web in the longitudinal direction of the mineral fiber insulating web. In Figs. 3, 4, 5 and 6, the mineral fiber insulating web 50 may form the outlet of the mineral fiber insulating web 50 as shown in Fig. 2, or alternatively, the mineral fiber insulating web 50 produced at the location shown in Fig. 1.

In Fig. 3, the mineral fiber insulating web 50 is contacted with a press roller 51, by the action of which an endless foil 99 of thermoplastic material is applied to the upper surface of the mineral fiber insulating web 50. The endless film of thermoplastic material is supplied from roll 98. After the endless film 99 has been applied to the upper side of the surface of the mineral fiber insulating web 50, the mineral fiber insulating web 50 and the endless film 67 applied thereto are pushed through the corrugated aperture 64 '. wherein the opening comprises two opposing, corrugated guide plates 64 ^' and 66 ^' and two opposing end walls, one of which is indicated by 62 '. It will be appreciated that the film 99 should have elasticity allowing the film 99 and the mineral fiber insulating web 50 to be folded. The end walls of the corrugated bore 60 'and the corrugations of the corrugated bore plates 64' and 66 'extend from the inlet end of the corrugated bore 60' to its outlet end. As the mineral fiber insulating web 50 and the film 99 are pushed through the corrugated opening 60 ^L , the mineral fiber insulating web 50 folds in its longitudinal direction and provides a wavy and longitudinally folded mineral fiber insulating web 50 ¹ .

Referring to FIG. 4, an alternative technique for producing a corrugated and longitudinally folded mineral fiber insulating web 50 ¹ is described from a flat mineral fiber insulating web 50. The technique described in Fig. 4 differs from the technique described above in Fig. 3 in that an aperture 60 is used, wherein the aperture 60 differs from the corresponding aperture 60 shown in Fig. 3 in that the aperture 60 comprises straight opposing walls. one of which is denoted by 64 and the curved ends of the walls, one of which is denoted by 62.

Referring to FIG. 5, another alternative technique for producing a longitudinally folded mineral fiber insulating web 50 'is described from a flat mineral fiber insulating web 50'. The corrugated and longitudinally folded mineral fiber web 50 'is produced in accordance with the technique shown in FIG. 5 by a roller assembly 60' comprising planar wall ends 62 serving the same purpose as the planar wall ends 62 'and the curved wall ends 62 shown in FIG. 3 and 4, to introduce the lower corners of the flat mineral fiber web 50 into the undulating and longitudinally folded mineral fiber web 50 '. The roller assembly 50 'further comprises a total of nine roller sets, each roller set comprising two rollers arranged on opposite sides of the mineral fiber insulating web. In FIG. 5, the two rollers are designated by the reference numeral 48. The roller sets define a tapered configuration of the taper from the inlet end of the roller assembly 60 'to its outlet end from which the corrugated and longitudinally folded mineral fiber insulating web 50' 'is supplied. The tapered configuration helps the flat insulating web 50 to undulate and fold longitudinally into the configuration of the composite mineral fiber web 50 'as shown in FIG. 5.

Fig. 6 shows an alternative technique for manufacturing a longitudinally folded mineral fiber insulating web 50 '. According to the technique described in Fig. 6, a location 60 is used which forms a combined height / longitudinal compression site and a transverse compression site. Thus, the location 60 comprises a total of six roller sets, three of which are made up of three roller sets of rollers 56, 56, 58 and 58; and 56 '' ', 58' '' as described above in FIG.

2.

The location 60 shown in FIG. 6 further comprises three roller sets, of which the first set consists of two rollers 152 'and 154', the second set consists of two rollers 152 and 154 and the third set consists of two rollers 152 'and 154'. The rollers 152 ', 152 and 152' are arranged on top of the surface of the mineral fiber insulating web 50 similar to the rollers 56 ', 56' and 56 '.

The three rollers 154 ', 154 and 154' are arranged similarly on the underside of the mineral fiber insulating web 50. as rollers 58 ', 58 and 58'. Three roller assemblies 152 ', 154

152, 154 and 152 ', 154' serve the same purpose as the belt assemblies 52, 54 described above in connection with Fig. 2, ie the purpose of height compression of the mineral fiber insulating web 50 entering the location 60.

Three sets of height compression rollers 152 ', 154'; 152, 154; and 152 ', 154 ¹ are similar to the above-described belt assemblies 52, 54 operating at the same rotational speed as the rate of input-insulating web 50 from the mineral fiber to the height-compressing station 60. The three sets of rollers constituting the longitudinally-compressing section, i.e. rollers 56 ', 58'; 56, 58; and 56 ', 58', operate at a reduced rotational speed determining the longitudinal compression ratio.

To generate the longitudinal composition of the mineral fiber insulating web 50, the inlet 60 shown in FIG.

6, four crankshaft assemblies are provided, designated 160 ', 160, 160' and 160. The crankshaft assemblies have the same structures, and one crankshaft assembly 160 is described below because the crankshaft assemblies 160 ', 160' and 160 are identical to the crankshaft assembly 160 and comprise elements identical to those of the crankshaft assembly 160, but denoted by the same reference numerals with one or two additional signs added.

The crankshaft assembly 160 includes a motor 162 that moves the gear assembly 164 from which the shaft 166. extends. Six gear wheels 168 of the same configuration are mounted at the output of the shaft 166. Each gear 168 engages a corresponding gear 170. Each of the gear wheels 170, the crankshaft drive wheel of the crankshaft system further comprises a guide wheel 172 and a crankshaft arm 174. The crankshaft arms 174 are arranged to move from a lowered position to an elevated position between two connected rollers on the right side, the underside of the mineral fiber insulating web 50 entering 60 and are adapted to cooperate with the crankshaft arms of system 160 ¹ the crankshaft located on the right side, the top side of the inlet of the mineral fiber insulating web 50 to the location 60.

Similarly, the crankshaft arms of the crankshaft arm system 160 'and 160, arranged on the left, on the top and bottom of the mineral fiber insulating web 50 at the inlet to location 60 are adapted to cooperate as described below.

As can be seen in FIG. 6, the first arm assembly 174 ', 174, 174', 174the crankshaft of the arm system 160 ',

160, 160 * 2 and 160 crankshafts are located between the first and second sets of rollers 152 ', 154', and 152, 154. Similarly, the second set of crankshaft arms is located between the second and third sets of rollers 152, 154 and 152 ¹ , 154 '.

The crankshaft arms of each of the six crankshaft arm sets are equally wide. In each of the crankshaft arms 160 ', 160, 160' and 160, the first crankshaft arm is the widest and the crankshaft arm width decreases with each crankshaft arm system from the first crankshaft arm to the sixth crankshaft arm located behind the sixth set rollers 56'58 '.

Using the motors of the crankshaft assembly 160 ', 160, 160' and 160, the crankshaft arms of a specific crankshaft assembly rotate synchronously with the remaining three crankshaft arms of the respective crankshaft arm assembly. In addition, the crankshaft arms of all six crankshaft assemblies operate synchronously and in synchronization with the speed of entry of the mineral fiber insulating web 50 into position 60. The widest or first crankshaft arm assembly is adapted to begin folding the mineral fiber insulating web 50, when the arms are twisting 174 and 174 crankshafts of the crankshaft arm systems 160 and 160 from positions below the bottom surface of the mineral fiber insulating web 50 and are contacted with the underside of the surface of the mineral fiber insulating web 50 while lowering the crankshaft arms 174 ¹ and 174 ' The crankshaft arms 160 'and 160' from positions above the top of the surface of the mineral fiber insulating web 50 are contacted with the top of the surface of the mineral fiber insulating web 50.

Further rotation of the output shafts 166 ', 166, 166' and 166 causes the crankshaft arms of the first crankshaft arm set to move against the center of the mineral fiber insulating web 50, thereby causing a central bending of the mineral fiber insulating web 50. As the crankshaft arms of the first crankshaft assembly reach the center position, the crankshaft system arms 160 'and 160' are raised, while the crankshaft arms 160 and 160 of the systems are lowered and consequently come into contact with the top and bottom of the insulating web surface 50 mineral fiber.

As the mineral fiber insulating web 50 moves through location 60, the next or second crankshaft arm assembly causes second and third bends of the mineral fiber insulating web 50, wherein the second or third bend is positioned on opposite sides to the first bend, while the third, fourth The fifth and sixth crankshaft arm sets produce further bending of the mineral fiber insulating web to obtain a total, longitudinal bending of the mineral fiber insulating web.

Width of crankshaft arms of each crankshaft arm assembly, gear ratios 164 ', 164, 164' and 164, gear ratios 164 ', 164, 164' and 164 '', gear ratios 168 and 170, and input speed The mineral fiber insulating web 50 to the location 60 is mutually adapted and further adapted to rotate speed of the height compression and longitudinal compression sections for producing the longitudinally bent and height and longitudinally compressed mineral fiber insulation web 50 '.

Integrating the altitude compression section, the longitudinal compression section and the longitudinal bending section into a single location as described above in Figure 6 is not essential to the operation of the longitudinally bending crankshaft systems described above in Figure 6. The altitude compression, longitudinal compression and section sections The longitudinal bending can be separated, but the integration of all three functions reduces the overall size of the production equipment. Moreover, it should be understood that the bending of the mineral fiber web as described above with reference to FIG.

4,5 and 6 provide transverse compaction and compression of the web, further providing web homogenization as compared to the bent inlet web.

Fig. 11 shows a vertical section of a corrugated and longitudinally bent mineral fiber insulating web 50 '. The corrugated and longitudinally bent mineral fiber insulating web 50 'comprises a central core or body 28 and oppositely arranged surface layers 24 and 26, wherein the surface layers 24 and 26 are separated from the central core or body 28 of the corrugated and longitudinally bent mineral fiber web 50' along the imaginary lines of division 20 and 22. The surface layers 24 and 26 of the corrugated and longitudinally bent mineral fiber insulating web 50 'are comprised of segments of bent mineral fiber insulating web, wherein the segments comprise mineral fibers that are oriented substantially transversely with respect to the longitudinal direction of the corrugated and longitudinally bent mineral fiber insulating web 50 '. The corrugated and longitudinally bent mineral fiber insulating web 50 'is made from the second mineral fiber web 50 by bending the second mineral fiber web 50, optionally after compacting the second mineral fiber web 50, as described below with reference to FIG. 8 and the overall mineral fiber orientation of the second mineral fiber insulating web 50 is consequently maintained by the segments of the corrugated and longitudinally bent mineral fiber insulating web 50 ', which together form the surface layers 24 and 26.

The central core or body 28 of the corrugated and longitudinally folded web 50 of insulating mineral fiber ¹ is composed of segments of the bent insulating web 50 and the mineral fiber, which are bent perpendicular to the segments of the surface layers 24 and 26, insulating web 50 'of the mineral fiber. The mineral fibers of the central core or body 28 of the corrugated and longitudinally bent mineral fiber insulating web 50 'are consequently oriented substantially perpendicular to the longitudinal direction as well as the transverse direction of the corrugated and longitudinally bent mineral fiber insulating web 50'.

The corrugated and longitudinally bent mineral fiber insulating web 50 shown in FIG. 9 and manufactured in accordance with the techniques set forth above with reference to FIGS. 3, 4, 5 and 6 is further processed at the location illustrated in FIG. the surface layer 24 is separated from the central core or body 28 of the corrugated and longitudinally bent mineral fiber insulating web 50 'along the imaginary cutting line 20 shown in FIG. 9. The surface layer 24 is separated from the rest of the mineral fiber insulating web by a cutting tool 72 when carrying and conveying the mineral fiber insulating web through the conveyor belts 70. The cutting tool 72 may be a stationary tool or a knife, or alternatively may be a transverse inverting cutting tool. The surface layer 24 separated from the mineral fiber insulating web exits the path of the remaining portion of the mineral fiber web by means of a conveyor belt 74 and is conveyed by the conveyor belt 74 to three roller sets including a first set of rollers 76 'and 78', a second set of rollers 76 and 78 and a third set of rollers 76 'and 78', wherein the three sets together form a compaction or compression section similar to the second section of the corresponding location described above with reference to FIG. 2.

Fig. 8 shows a transverse-compression point, indicated by 80 as a whole. At 80, the central core or body 28 or alternatively the corrugated and longitudinally bent mineral fiber insulating web 50 'produced at one of the locations described above in relation to FIGS. 3,4,5 and 6 is contacted with two conveyor belts. 85 and 86, which define the compression that acts on the mineral fiber insulating web, thereby compressing it laterally and contacting a total of four surface-rotating rollers 89a, 89b, 89c and 89d which, together with similar rollers not shown on the arranged against the rollers 89a, 89b, 89c and 89d to assist in achieving transverse compression of the central body or core 28. The conveyor belts 85 and 86 are mounted on rollers 81,83 and 82,84.

From the transversally-compressing 80 is supplied transversally compressed and compacted central core or body 28 of ^{the first} As the central core or body 28 moves through the transverse compression site 80 and converted into the transversely compressed central core or body 28 ', the body or core is supported by rollers arranged as an inlet roller 87 and an outlet roller 88.

Although the central core or body 28 entering the transverse compression location 80 is preferably comprised of the above-described central core or body separated from the mineral fiber insulating web 50 as described above with reference to FIG. 7, the mineral fiber insulating web 50 may be a mineral fiber web produced alternatively at the location 80 shown in FIG. 8.

If the central body or core 28 or mineral fiber insulating web 50 'to be transversely compressed at 80 is provided with an upper surface layer, such as the film 99 described above with reference to Figure 3, the film should have a structure, which is compatible with transverse compression of the web and film. The film applied to the top of the surface of the mineral fiber insulating web 50 as shown in FIG. 3 should be compressible and adjustable to reduce the width of the transversely compressed central core or body 28 'or the transversely compressed mineral fiber insulating web extending from location 80 lateral compression.

After compacting the separated surface layer 24 as described above in FIG. 7, the compacted surface layer 24 returns to the remaining portion of the mineral fiber insulating fleece or central core or body, which has been preferably laterally compressed as described above in FIG. 8. and engage in face contact with the top surface of the central core or body 28 as shown in FIG. 9.

In Fig. 9, a roll set comprising a roll 79 'and a roll 79 arranged on the top and bottom of the surface of the surface layer 24 forms a roll set by means of which the surface film 99' supplied from the roll 98 'is applied to the top surface of the compacted surface layer 24. Of the rollers 79 'and 79, the surface layer 24, which forms an integral mineral fiber insulating web of high compaction compared to the central core or body 28, is advanced to the top of the surface of the central core or body 28 by two rollers 77' and 77. 77 is located below the surface layer 24 and forms a rotatable roller, while a roller 77 located above the top surface of the surface layer 24 serves to compress the compacted surface layer 24 into face contact with the top surface of the central core or body 28 being supported. and transported by the conveyor belt 70 also shown in FIG. 7. After the compacted surface layer 24 has been brought into face-to-face contact with the top surface of the central core or body 28, a mineral fiber insulating web assembly is provided, which is generally designated 90.

In FIG. 9, another film 99 is shown in broken lines. This film is supplied from roll 98. The film 99 may be a continuous film or alternatively an apertured film, i. a film similar to the surface film 99 'described above. It should be noted that the films 99, 99 'and 99 contain optional features that can be omitted if the integral web of the nonwoven is still produced from the integral fibers.

Alternatively, one or more of said films, or all of the films, may be provided in various embodiments of the mineral fiber insulating web produced according to the present invention.

It should be noted that the densified surface layer 24, which is separated from the mineral fiber insulating web 50 'as shown in Figure 7, may alternatively be provided from a separate production line, such as one of the manufacturing sites shown in Figure 3, 4.5 and 6, which can be connected directly to the manufacturing site shown in FIG. 9, optionally via the manufacturing site shown in FIG. 8, and thus the manufacturing site shown in FIG. 7 can be eliminated. Preferably, the manufacturing site shown in FIG. 7 adapted to separate two surface layers from the central core or body 28 to produce two separate surface layers separated from the opposing surfaces of the central core or body 28, and the surface layers are treated in accordance with the technique described in connection with FIG. highly compacted surface layers which, in accordance with the technique described in connection with FIG. a core or body 28 on opposite sides thereof to form a coating / sandwiching of the central core or body 28, which was preferably transversely compressed as described above with reference to FIG. 8, between two opposing surface layers similar to the surface layer 24 shown in FIG. 9

In Fig. 10, the mineral fiber insulating web assembly 90 is moved through a curing point including a curing oven or curing oven comprising opposing curing oven sections 92 and 94 that generate heat to heat the mineral fiber insulating web assembly 50 to an elevated temperature such that by curing the thermosetting bonding agent of the mineral fiber insulating web assembly and bonding the mineral fibers of the central core or body of the assembly and the mineral fibers of the compacted surface layer or layers to form an integral mineral fiber insulating web that is cut into plate segments with a knife 96. If the film 99 and optionally the endless film 99 'and 99 are present, the thermoplastic material is also a film 99,99' and 99; melting, providing further binding of the mineral fibers of the mineral fiber insulating web.

Fig. 10 shows an individual plate segment 10 comprising a central core 12 and an upper layer 14. The upper layer 14 is made of a compacted surface bore 24, while the core 12 is made of a central core or body 28 of corrugated and longitudinally folded insulating fleece 50. The mineral fibers shown in FIG.

Fig. 12 is a fragmentary and perspective view of a first embodiment of a plate segment of a mineral fiber insulating web according to the present invention, denoted by 10 as a whole. The plate-like segment 10 comprises a central core 12 and an upper layer 14 and a lower layer 16 made of a surface layer of a mineral fiber insulating web 50. Reference numeral 18 denotes the core segment 12 of the plate-shaped segment 10, wherein the segment 18 is made of a central core or body 28 of corrugated and longitudinally folded mineral fiber insulating web 50 ', wherein the central core or body has preferably been laterally compressed as described above in connection Fig. 8.

Fig. 13 is a fragmentary and perspective view of a second embodiment of a plate segment of a mineral fiber insulating web according to the present invention, denoted as a whole by 10 '. Similar to the plate segment 10 described above with reference to Fig. 12, a plate segment 10 'comprises a central core 12, an upper layer 14 and a lower layer 16. In addition, a top surface cover 15 is provided, which is formed by the film 99 ¹ described above with reference to FIG. 9. the plastic film or, alternatively, the cover may be of non-plastic materials such as paper materials, serving exclusively for design and architectural purposes. Alternatively, the topsheet 15 may be applied to the mineral fiber insulating web after curing of the thermosetting binder, i.e., the curing agent. after exposure of the mineral fiber insulating web 90 to the heat generated in the drying sections 92 and 94 shown in FIG. 10.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

A thermally insulating board of a structure similar to that of FIG. 1, made from a mineral fiber insulating web according to the method of the present invention as described above in connection with FIGS. 1-10, is produced according to the specifications below:

The process comprises steps similar to those described above in relation to Figs. 1,2,6,7,8,9 and 10. The production output of the device is 5000 kg / h. The basis weight of the primary web produced at the location described in FIG. 1 is 0.4 kg / m ³ and the width of the primary web is 3600 mm. The density of the central core or body 28 is 20 kg / m ³ . The longitudinal compression ratios produced at two separate locations similar to those of Figure 2 are 1: 1 and 1: 2 and the transverse compression ratio produced at the location of Figure 8 is 1: 2. The final plate comprises a single surface layer having a basis weight of 1 kg / m 2. The longitudinal compression ratio of the layer is 1: 2. The coating thickness was 10.00 mm and the coating density was 100 kg / m 2. the width of the mineral fiber insulating web produced in FIG. 1 is 1800 mm.

The manufacturing parameters used are given in Tables A and B below:

Table A

Total thickness A (B) C D E F mm m / minx10 m / min m / min m / min m / min m / min 50 11.57 51.44 51.44 51.44 15.72 25.72 75 11.57 40.26 40.26 40.26 20.13 20.13 100 ALIGN! 11.57 33.07 33.07 33.07 16.53 16.53 125 11.57 28.06 28.06 28.06 14.03 14.03 150 11.57 24.37 24.37 24.37 12.18 12.18 175 11.57 21.53 21.53 21.53 10.77 10.77 200 11.57 19.29 19.29 19.29 9, 65 9, 65 225 11.57 17.47 17.47 17.47 8.74 8.74 250 11.57 15.96 15.96 15, 96 7.98 7.98 275 11.57 14.70 14.70 14.70 7.35 7.35

A = spin speed 42 of the spinning chamber

B = belt speed 48

C = belt speed 70 after first longitudinal compression (Fig. 2) D = belt speed 70 after transverse compression (Fig.8)

E = belt speed 70 after the second longitudinal compression (Fig. 2) F = belt speed 70 in front of the curing oven (Fig. 5)

Table Β

Total thickness G H AND J TO L mm kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² 50 0.45 0, 45 0.90 0.40 0, 80 1.80 75 0.58 0.58 1.15 0.65 1.30 2.30 100 ALIGN! 0.70 0.70 1.40 0.90 1.80 2.80 125 0.83 0.83 1.65 1.15 2.30 3.30 150 0.95 0.95 1.90 1.40 2.80 3.80 175 1.08 1.08 2.15 1.65 3.30 4.30 200 1.20 1.20 2.40 1.90 3.80 4.80 225 1.33 1.33 2, 65 2.15 4.30 5.30 250 1, 45 1.45 2.90 2.40 4.80 5.80 275 1.58 1.58 3.15 2.65 5.30 6.30

G = basis weight of mineral fiber insulating web on belt 42

H = basis weight of mineral insulating fleece from first longitudinal compression (fig.2)

1 = basis weight of mineral transverse compression insulating fleece (Fig.8)

J = basis weight of mineral insulating web before second longitudinal compression (Fig. 2)

K = basis weight of mineral insulating web after second longitudinal compression (fig.2)

L = basis weight of mineral fiber insulating web by fiber to fiber fiber in front of the curing oven.

Figure 14 is a diagram illustrating the relationship between the parameters listed in Table A. The designations used in Figure 14 correspond to the designations in Table A.

Figure 15 is a diagram illustrating the relationship between the parameters listed in Table 8. The designations used in Figure 15 correspond to the designations in Table B.

Example 2

A composite roofing sheet similar to that shown in FIG. 12 made from an insulating web produced by the method of the present invention as described above with reference to FIGS. 1-10 is produced according to the following:

The process comprises steps similar to those described above in Figs. 1,2,6,7,8,9 and 10. The production output of the device is 5000 kg / h. The basis weight of the primary web produced at the location described in FIG. 1 is 0.6 kg / m ² and the width of the primary web is 3600 mm. The density of the central core or body 28 is 120 kg / m ² . The longitudinal compression ratios produced at two separate locations similar to those of Figure 2 are 1: 3 and 1: 2 and the transverse compression ratio produced at the location of Figure 8 is 1: 2. The final plate contains a single surface layer with a basis weight of 3.57 kg / m ² . The longitudinal compression ratio of the layer is 1: 2. The thickness of the coating is 17.00 mm and the density of the coating is 210 kg / m ² . The width of the mineral fiber insulating web produced in FIG. 1 is 1800 mm.

The manufacturing parameters used are given in Tables C and D below:

Table C

Total thickness A (B) C D E F mm m / minx10 m / min m / min m / min m / min m / min 50 7.72 38.58 12.86 12.86 6.43 6.43 75 11.57 27.92 9.31 9.31 4, 65 4.65 100 ALIGN! 11.57 21.87 7.29 7.29 3, 65 3, 65 125 11.57 17.98 5.99 5.99 3.00 3.00

150 11.57 15.26 5.09 5.09 2.54 2.54 175 11.57 13.26 4.42 4.42 2.21 2.21 200 11.57 11.72 3.91 3.91 1.95 1.95 225 11.57 10.50 3.50 3.50 1.75 1.75 250 11.57 9.51 3.17 3.17 1.59 1.59 275 11.57 8.69 2.90 2.90 1.45 1.45 A = belt speed 42 spinning chambers B = belt speed 48 C = belt speed 70 after the first longitudinal compression (giant. ; D = belt speed 70 after transverse compression (fig.8) E = belt speed 70 after the second longitudinal, compression (fig.2 F = belt speed 70 in front of the curing oven (fig. 5)

Table D

Total thickness G H AND J TO L mm kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² kg / m ² 50 0, 60 1.80 3, 60 1.82 3, 63 7.20 75 0.83 2.49 4.98 3.19 6.38 9.95 100 ALIGN! 1.06 3.18 6.35 4.57 9.13 12.70 125 1,25 3.86 7.73 5.94 11.88 15.45 150 1.52 4.55 9.10 7.32 14.63 18.20 175 1.75 5.24 10, 48 8.69 17.38 20.95 200 1, 98 5.93 11.85 10,07 20.13 23.70 225 2.25 6, 61 13.23 11.44 22.88 26.45 250 2.43 7.30 14, 60 12.82 25, 63 29.20 275 2.66 7.99 15, 98 14.19 28.38 31.95

G = basis weight of mineral fiber insulating web on belt 42

H = basis weight of mineral fiber insulating web after first longitudinal compression (fig.2)

1 = basis weight of mineral fiber insulating web after transverse compression (Fig.8)

J = basis weight of mineral fiber insulating fleece before second longitudinal compression (Fig. 2)

K = basis weight of mineral fiber insulating web after second longitudinal compression (fig.2)

L = basis weight of mineral fiber insulating fleece in front of the curing oven.

Figure 16 is a diagram similar to Figure 14 illustrating the relationship between the parameters listed in Table C above.

Figure 17 is a diagram similar to Figure 15 illustrating the relationship between the parameters listed in Table D above.

Example 3

The importance of subjecting the mineral fiber insulating web to longitudinal and transverse compression is illustrated by the data given in Table E below:

Table Ε common insulation.

mineral fiber boards mineral fiber insulating boards made according to the invention, not subjected to longitudinal / transverse compression of mineral fiber insulating boards according to the invention subjected to longitudinal / transverse compression thermal insulation-compressive strength 2 kPa elasticity: 15 kPa- - - 125 kPa total 30 kg / nj kPa

150 kPa roof thermal compressive strength 70 kPa - - - 180 kPa _ _ - 210 kPa insulation board - modulus of elasticity: 600 kPa- - - 3300 kPa - - -4000 kPa with a density of 150 kg / nJ

The mineral fiber insulation boards of the present invention clearly demonstrate increased compressive strength and modulus of elasticity compared to conventional thermal insulation boards. However, the mechanical strength of the mineral fiber insulating boards of the present invention is further increased by subjecting the mineral fiber insulating fleece from which the insulating panels are made to longitudinal and transverse compression as discussed above in Figures 2 and 8.

Claims (35)

PATENT CLAIMS A method for producing a mineral fiber insulating web comprising the steps of: a) producing a first nonwoven mineral fiber web defined by a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to said first mineral fiber web, wherein the first mineral fiber web comprises mineral fibers generally arranged in said second transverse direction; comprising a first curing binder, b) moving said first mineral fiber web in said first longitudinal direction of said first mineral fiber web, c) bending the first mineral fiber web parallel to the first longitudinal direction and perpendicular to the second transverse direction to obtain a second non-woven mineral fiber web, wherein the second mineral fiber web comprises a central body and opposing surface layers which coat the central a body wherein the central body comprises mineral fibers arranged generally perpendicular to the first longitudinal direction and the second transverse direction and a surface layer comprising the mineral fibers arranged generally in the second transverse direction, d) movement of the second mineral fiber web in the first longitudinal direction, e) producing a third non-woven mineral fiber web defined by a third direction parallel to the third mineral fiber web, wherein the third mineral fiber web comprises mineral fibers arranged generally in the third direction and comprising a second curable binder, wherein the third mineral fiber web is mineral fibers of high compactness compared to the second mineral fiber fabric, f) joining the third mineral fiber web with the second mineral fiber web in face contact with it to form a fourth composite mineral fiber web; and g) curing the first and second curable binder agents such that the mineral fibers of the fourth composite material are bonded to each other, thereby forming a mineral fiber insulating web. 2. The method of claim 1, wherein said third nonwoven mineral fiber web is produced by separating a surface segment of the layer of said first mineral fiber web and compacting the surface segment of the layer for producing the third mineral fiber web. The method of claim 2, wherein said compacting of the surface segment of the layer comprises the steps of folding the surface segment of the layer to obtain a third mineral fiber web comprising mineral fibers arranged generally transverse to the longitudinal direction of the third web. mineral fiber. A method according to claim 3, characterized in that. wherein said third non-woven mineral fiber web is produced by separating one of said surface layers of said second mineral fiber web from its central body and compacting said one of said surface layers to produce said third mineral fiber web. Method according to any one of claims 1 to 4, characterized in that. comprising a further step similar to step e) for producing a fifth non-woven mineral fiber web similar to the third mineral fiber nonwoven and a bonding step in step f) of said fifth mineral fiber web in face contact thereto and thereby laminating said second mineral fiber web between said third and fifth mineral fiber webs in said fourth mineral fiber web. A method according to any one of claims 1 to 5, characterized in that. wherein said folding in step c) comprises folding the first mineral fiber web so as to produce continuous ripples extending in said first longitudinal direction of said first mineral fiber web. A method according to any one of claims 1 to 6, characterized in that. wherein said third direction is perpendicular to said first longitudinal direction. A method according to any one of claims 1 to 6, characterized in that. wherein said third direction is coincident with said first longitudinal direction. A method according to any one of claims 1 to 8, characterized by. The method of claim 1, wherein said first mineral fiber web comprises the first step of manufacturing said first mineral fiber web from said base nonwoven mineral fiber web by arranging said mineral fiber web into overlapping layers. A method according to claim 9, characterized in that. wherein said base, nonwoven mineral fiber web is disposed generally overlapping said second transverse direction. A method according to any one of claims 1 to 10, characterized by. The method of claim 1 further comprising a step of height compressing said first nonwoven mineral fiber web produced in step a). A method according to any one of claims 1 to 11, characterized by. characterized in that it further comprises a step of longitudinally compressing said first non-woven mineral fiber web produced in step) and further or alternatively a further step of longitudinally compressing said methane mineral fiber web produced in step c). A method according to any one of claims 1 to 12, characterized by. The method of claim 1 further comprising the step of transversely compressing said second non-woven mineral fiber web produced in step c). A method according to any one of claims 1 to 13, characterized in. The method of claim 1 further comprises the step of compressing said fourth composite mineral fiber web prior to introducing said fourth composite mineral fiber web into said curing oven. A method according to any one of claims 1 to 14, characterized by. further comprising the step of applying the film to the surface side or both surfaces of said first nonwoven mineral fiber web and / or applying the film to the surface side or both surfaces of said second nonwoven mineral fiber web. A method according to any one of claims 1 to 15, characterized in. further comprising the step of cutting said fourth composite mineral fiber web into plate-like segments. 17. An apparatus for producing a mineral fiber insulating web comprising: a) first means for producing a first non-woven mineral fiber web defining a first longitudinal direction parallel to the mineral fiber web and a second transverse direction parallel to the first mineral fiber web, wherein the first mineral fiber web is made to include mineral fibers arranged generally in a second transverse direction and comprises a first curable agent, b) second means for moving the first mineral fiber web in the first longitudinal direction of the first mineral fiber web, c) third means for folding the first mineral fiber web parallel to the first longitudinal direction and perpendicular to the second transverse direction so as to form a second non-woven mineral fiber web comprising a central body and opposing surface layers coating the central body, wherein the central body comprising mineral fibers arranged generally perpendicular to the first longitudinal direction and the second transverse direction and a surface layer comprising mineral fibers arranged generally in the second transverse direction, d) fourth means for moving the second mineral fiber web in the first longitudinal direction; e) a fifth means for producing a third non-woven mineral fiber web defining a third direction parallel to the third mineral fiber web, wherein the third mineral fiber web is made to comprise mineral fibers generally arranged in a third direction and comprises a second curable binder; the third mineral fiber web is a mineral fiber web of greater compactness compared to the second mineral fiber web, (f) sixth means for joining the third mineral fiber web to the second mineral fiber web in their face contact to produce a fourth composite mineral fiber web; and g) seventh means for curing the first and second curable binder agents by binding the mineral fibers of the fourth composite mineral fiber web to each other to form a mineral fiber insulating web. 18. The apparatus of claim 17, wherein said fifth means is adapted to produce a third non-woven mineral fiber web by separating a surface layer segment from said first mineral fiber web and compacting said surface segment segment to produce said third mineral fiber web. fibers. 19. The apparatus of claim 18 wherein said fifth means is adapted to compact said surface segment by folding said surface segment to form a third mineral fiber web comprising mineral fibers arranged predominantly transverse to the longitudinal direction. said third mineral fiber web. 20. The apparatus of claim 17 wherein said fifth means is adapted to produce a third nonwoven mineral fiber web by separating one of said surface layers of said second mineral fiber web from its central body and compacting said one of said surface layers. to form said third mineral fiber web. The apparatus of any one of claims 17 to 20, further comprising eighth means similar to said fifth means for making a fifth nonwoven mineral fiber web similar to said third mineral fiber web and a ninth means for attaching said fifth nonwoven web. the mineral fiber web to said second mineral fiber web in the face contact thereof and thereby laminating said second mineral fiber web between said third and fifth mineral fiber webs in said fourth mineral fiber web. An apparatus according to any one of claims 17 to 20, characterized in that it is adapted to fold said first mineral fiber web so as to form a continuous ripple extending in said first longitudinal direction of said first mineral fiber web. The apparatus of any one of claims 17 to 22, wherein said third direction is perpendicular to said first longitudinal direction. The device of any one of claims 17 to 22, wherein said third direction is coincident with said first longitudinal direction. Apparatus according to any one of claims 17 to 24, characterized in that said first means are adapted to produce said first mineral fiber web from a base nonwoven web of The mineral fiber web is also provided by overlapping layers of the mineral fiber web. 26. The apparatus of claim 25, wherein said first means is adapted to arrange said base, nonwoven mineral fiber web generally overlapping in said second transverse direction. The apparatus of any one of claims 17 to 26, further comprising a tenth means for height compressing said first nonwoven mineral fiber web produced by said first means. Apparatus according to any one of claims 17 to 27, further comprising eleventh means for longitudinally compressing said first nonwoven mineral fiber web produced by said first means and further or alternatively twelfth means for longitudinally compressing said second nonwoven mineral fiber web. produced by said third means. Apparatus according to any one of claims 17 to 28, further comprising thirteenth means for laterally compressing said second non-woven mineral fiber web produced by said third means. The apparatus of any one of claims 17 to 29, further comprising fourteenth means for compressing said fourth composite mineral fiber web prior to introducing, by said seventh means, said fourth composite mineral fiber web into said curing oven. An apparatus according to any one of claims 17 to 30, further comprising fifteenth means for applying the film to the surface or both surfaces of said first non-woven mineral fiber web and / or applying the film to the surface or both surfaces said second non-woven mineral fiber web. The apparatus of any one of claims 17 to 31, further comprising sixteenth means for cutting said cured fourth composite mineral fiber web into plate-like segments. 33. A mineral fiber insulating board defining a longitudinal direction and comprising: a central body comprising mineral fibers, a surface layer comprising mineral fibers, a central body and a surface layer interconnected in face contact, said mineral fibers of the central body being arranged generally perpendicular to the longitudinal direction and perpendicular to the surface layer; Arranged generally in a direction parallel to the longitudinal direction, said surface layer being more compact compared to the central body, and said mineral fibers of said central body and said mineral fibers of said surface layer being joined to an integral structure only by curing the binders in a single curing process and Initially, they are present in the non-cured, non-woven mineral fiber webs from which the central body and the surface layer are made. 34. The mineral fiber insulating board of claim 33, comprising opposing surface layers of the same structure laminating the central body into said integral structure. Mineral fiber insulating board according to claims 33 to 34, characterized in that it is produced by a method according to any one of claims 1 to 16 and / or by means of a device according to any one of claims 17 to 32.