Glass fiber mat and mineral wool moulded part provided with a glass fiber mat

Abstract

The invention relates to a glass fiber mat made of glass fibers coated with a coating composition, wherein the coating composition contains approx. 5 wt. % up to approx. 50 wt. % of at least one binder, relative to the total amount of the coating composition, wherein the at least one binder is substantially non-crosslinked and, when the glass fiber mat is drying at a temperature equal to or greater than a crosslinking temperature of the at least one binder, said binder crosslinks to form thermosetting properties, and the coating composition is present in film-like form on the glass fibers.

Description

[0001] Glass fleece and mineral wool molded part covered with glass fleece

[0002] The present invention relates to a glass fleece, a method for producing the glass fleece, a use of the glass fleece, a mineral wool molded part with at least one layer of the glass fleece and a method for producing the mineral wool molded part provided with at least one layer of the glass fleece.

[0003] Glass fleeces are widely known from the state of the art. Mineral wool molded parts are also well-known. These are used as insulation panels. Photovoltaic or solar panels, for example, are installed on roof insulation. The mineral wool molded parts must permanently support the photovoltaic or solar panels and are therefore subjected to considerable stress. For this reason, the mineral wool molded parts are laminated offline in a separate process after their manufacture. This preparation of the mineral wool molded parts, comprising the manufacturing of the mineral wool molded parts in a first step and the lamination of the mineral wool molded parts with, for example, a glass fleece in a second step, is very complex. Therefore, there is a need to simplify the lamination process for mineral wool molded parts.

[0004] The object of the present invention is to provide a glass fleece which is cost-effective and easy to use in an inline process.

[0005] This problem is solved according to the invention by a glass fleece made of glass fibers coated with a coating composition, wherein the coating composition comprises about 5 wt.% to about 50 wt.% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks when the glass fleece is dried at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present on the glass fibers in a film-like form.

[0006] When the term "approximately" is used in connection with values ​​or ranges of values ​​within the scope of the invention, it refers to a tolerance range that a person skilled in the art considers customary in this field. In particular, a tolerance range of ±20%, preferably ±10%, and more preferably ±5% is provided. Where different ranges are specified for information and / or definitions in the present invention, the lower and upper limits of the different ranges with respect to the respective information, in particular a component, and / or the respective definition, can be combined with one another. Within the scope of the present invention, the use of the term "essentially" with respect to a property means a tolerance range that is acceptable to a person skilled in the art from an economic and technical point of view, such that the property is still recognizable as such.

[0007] According to the invention, the coating composition comprises approximately 5 wt.% to approximately 50 wt.% of at least one binder, preferably between approximately 10 wt.% and approximately 45 wt.%, and more preferably between approximately 15 wt.% and approximately 40 wt.%, based on the total amount of the coating composition. Preferably, the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid, and / or alcohol groups. Preferably, the at least one binder is selected from a group comprising a polymer composition of at least one polycarboxylic acid and at least one polyhydric alcohol. The advantage of this polymer composition is that the polycarboxylic acid and the at least one polyhydric alcohol can react, bind, and crosslink a polycarbonate.Preferably, the at least one binder is selected from the group consisting of urea-formaldehyde resin, melamine-formaldehyde resin, acrylate, vinyl acetate and / or polyvinyl alcohol. Further preferably, the at least one binder is formaldehyde-free.

[0008] Preferably, the at least one binder has a crosslinking temperature in the range of about 120°C to about 250°C, more preferably from about 125°C to about 190°C, and particularly preferably from about 130°C to about 170°C. The crosslinking temperature is the temperature at which the binder crosslinks. In a preferred embodiment, the at least one binder is a polymer composition of at least one polycarboxylic acid and at least one polyhydric alcohol, and the at least one binder has a crosslinking temperature of about 150°C.

[0009] According to the invention, the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than the crosslinking temperature of the at least one binder, forming thermosetting properties. In the preferred embodiment, the polymer composition crosslinks at least one polycarboxylic acid and at least one polyhydric alcohol to form at least one polycarbonate. The at least one polycarbonate exhibits thermosetting properties. Preferably, the at least one crosslinked binder cannot be deformed after curing by heating or other means.

[0010] Preferably, the at least one binder is heated to form a film in two independent sub-processes and then thermally crosslinked to a thermoset film in a further process. Water can evaporate during the heating of the at least one binder. The glass fleece preferably comprises a film-like coating after heating. The glass fleece is preferably flexible. Preferably, the at least one binder is essentially uncrosslinked after heating the glass fleece and crosslinkable to form a thermoset film.

[0011] The coating composition preferably comprises water, at least one filler, at least one thickening agent, at least one surfactant, at least one dispersing agent and / or a water-repellent agent and / or further additives. Preferably, the coating composition comprises approximately 14 wt.% to approximately 65 wt.% water before heating, more preferably between approximately 20 wt.% to approximately 60 wt.%, and particularly preferably between approximately 25 wt.% to approximately 55 wt.%, based on the total amount of the coating composition. More preferably, the coating composition comprises approximately 30 wt.% to approximately 80 wt.% of the at least one filler, more preferably between approximately 35 wt.% to approximately 70 wt.%, and particularly preferably between approximately 40 wt.% to approximately 65 wt.%, based on the total amount of the coating composition. Preferably, the at least one filler is selected from the group comprising inorganic fillers and / or organic fillers.Preferably, the at least one filler is selected from the group consisting of aluminum hydroxide, magnesium hydroxide, silicon dioxide, calcium carbonate, melamine, pentaerythriol, and / or organic phosphonates. Preferably, the at least one filler has flame-retardant properties. Preferably, the at least one filler has an oxygen index (LOI value) according to ASTM D 2863 between about 25% and about 50%, more preferably between about 28% and about 48%, and particularly preferably between about 30% and about 45%. A higher oxygen index indicates better flame retardancy. Preferably, the coating composition comprises about 0.01 wt.% to about 5 wt.% of the at least one thickening agent, more preferably between about 0.05 wt.% and about 3 wt.%, and particularly preferably between about 0.3 wt.% and about 1 wt.%, based on the total amount of the coating composition.Preferably, the at least one thickening agent is selected from the group comprising natural thickeners and / or synthetic thickeners. Preferably, the at least one thickening agent is selected from the group comprising modified cellulose, polyacrylamides, polyethylene glycol, polyvinyl alcohol, and / or modified polyethers.

[0012] Preferably, the coating composition comprises approximately 0.01 wt.% to approximately 2 wt.% of the at least one surfactant, more preferably between approximately 0.05 wt.% and approximately 1 wt.%, and particularly preferably between approximately 0.1 wt.% and approximately 0.8 wt.%, based on the total amount of the coating composition. Preferably, the at least one surfactant is selected from the group comprising ethoxylates, alkyl glycosides, alkyl polyglycosides, sodium dedocylbenzenesulfonate, sodium laurylsulfonate, cocamidopropyl betaine, and / or lauryl betaine. The surfactant can also be referred to as an foaming agent and / or foam stabilizer, since in a foamed coating composition, the surfactant promotes foam formation and stabilizes the foam.

[0013] Preferably, the coating composition comprises approximately 0.01 wt.% to approximately 2 wt.% of the at least one dispersing agent, more preferably between approximately 0.05 wt.% and approximately 1 wt.%, and particularly preferably between approximately 0.1 wt.% and approximately 0.8 wt.%, based on the total amount of the coating composition. Preferably, the at least one dispersing agent is selected from the group comprising anionic dispersing agents, cationic dispersing agents, nonionic dispersing agents, and / or steric dispersing agents. Preferably, the at least one dispersing agent is selected from the group comprising sodium sulfate, sodium dodecylbenzenesulfonate, sodium laurylsulfonate, cetyltrimethylammonium bromide, dodecyltrimethylammonium bromide, benzyltrimethylammonium bromide, polyvinyl alcohol, polyethylene glycol, polyacrylate, silicon dioxide, titanium dioxide, ammonium acrylate, and / or aluminum hydroxide.

[0014] Preferably, the coating composition comprises approximately 0.01 wt.% to approximately 2 wt.% of the at least one hydrophobing agent, more preferably between approximately 0.05 wt.% and approximately 1 wt.%, and particularly preferably between approximately 0.1 wt.% and approximately 0.8 wt.%, based on the total amount of the coating composition. Preferably, the at least one hydrophobing agent is selected from the group comprising silicone-based hydrophobing agents and / or fluorocarbon-based hydrophobing agents. More preferably, the at least one hydrophobing agent is selected from the group comprising silanes, siloxanes, silicone resins, polytetrafluoroethylene, perfluoroalkyloctanesulfonates, and / or perfluoroalkylcarboxylic acids.

[0015] Preferably, the coating composition is present in an amount of about 100 g per square meter to about 1000 g per square meter of the coated glass fleece, more preferably between about 150 g per square meter to about 800 g per square meter, and particularly preferably between about 200 g per square meter to about 300 g per square meter.

[0016] According to the invention, the coating composition is present on the glass fibers in a film-like form. Preferably, the glass fibers are in the form of a glass fiber fleece. Preferably, a glass fiber has a diameter in the range of about 5 pm to about 20 pm, more preferably between about 8 pm and about 15 pm, and particularly preferably between about 10 pm and about 13 pm. Preferably, a glass fiber has a length in the range of about 5 mm to about 20 mm, more preferably between about 8 mm and about 16 mm, and particularly preferably between about 10 mm and about 14 mm.

[0017] Preferably, the glass fleece is air-permeable with an air permeability equal to or greater than approximately 200 l / h, preferably equal to or greater than approximately 500 l / h, and particularly preferably equal to or greater than approximately 700 l / h, measured according to DIN EN ISO 9237 at 20 cm. 2 and 200 Pa. Preferably, the air permeability of the glass fleece is less than 20,000 l / h, measured according to DIN EN ISO 9237 at 20 cm. 2 and 200 Pa. The air permeability allows water to evaporate, for example, through the glass fleece when used.

[0018] Preferably, the glass fleece can be wound into a roll. The advantage is its ease of use.

[0019] Preferably, the glass fleece comprises at least one non-woven fabric layer, one woven fabric layer, and / or one fiber reinforcement layer. The glass fleece may also comprise no non-woven fabric layer and / or woven fabric layer at all. Preferably, the glass fleece comprises at least one woven fabric layer and / or one non-woven fabric layer on one or both sides. Preferably, the glass fleece comprises at least one fiber reinforcement layer on one or both sides, or the fiber reinforcement is incorporated into the glass fleece.

[0020] The present invention further relates to a method for producing the coating composition described above. Preferably, the coating composition is produced by a foam mixer. To produce the foamed coating composition, the coating composition is mixed to a homogeneous dispersion as described above and pumped through the mixer, whereby the coating composition is whipped into a foam. Preferably, the coating composition to be foamed has a density of about 800 g / liter to about 1800 g / liter. More preferably, the density of the foamed coating composition, which can also be referred to as the foam density, is about 200 g / liter to about 1700 g / liter, and more preferably about 600 g / liter to about 1500 g / liter.The density is determined by completely filling a container with a defined volume of one liter with the foamed coating composition at 25 °C and then weighing it.

[0021] The present invention further relates to a method for producing the glass fleece described above, wherein glass fibers in the form of a glass fiber fleece are mixed with a coating composition comprising about 5 wt.% to about 50 wt.% of at least one binder, heated at a temperature at which the at least one binder does not crosslink, and wound into a roll. Preferably, glass fibers in the form of a glass fiber fleece are mixed with a coating composition comprising about 10 wt.% to about 45 wt.% of at least one binder, more preferably about 15 wt.% to about 40 wt.%, based on the total amount of the coating composition.

[0022] According to the invention, the coating composition is used in foamed form. The foamed form has the advantage that, due to the foam density, the foamed coating composition is distributed more evenly and continuously on and throughout the entire glass fleece, without filling voids in the glass fleece to a greater extent. As a result, the coated glass fleece exhibits higher air permeability, which contributes to a strong bond with the mineral wool in the final lamination process and also saves energy, resources, and costs.

[0023] Preferably, the coating composition is incorporated using an impregnation process and / or a doctor blade application. The advantage of this process is a uniform distribution of the coating composition. The impregnation process and / or the doctor blade application are preferably carried out before heating the coating composition.

[0024] Preferably, the coating composition is heated to a film-forming temperature. At this temperature, the at least one binder is heated to a film-forming temperature. Preferably, the heating temperature is below the crosslinking temperature. This has the advantage that the at least one binder does not crosslink at the heating temperature. Preferably, the heating temperature is in the range of approximately 80°C to approximately 130°C, more preferably from approximately 90°C to approximately 125°C, and particularly preferably from approximately 100°C to approximately 120°C.

[0025] The present invention further relates to the use of the above-described glass fleece for laminating mineral wool during a drying process in the production of the mineral wool or for laminating after the drying process. Using the glass fleece during the drying process in the production of the mineral wool is advantageous. Inline use is more effective and simpler. Preferably, the drying process in the production of the mineral wool takes place in an oven, particularly a tunnel oven. Preferably, the mineral wool is subjected to a flow of hot air during drying. Preferably, the mineral wool has a porosity of approximately 600 l / h to approximately 2000 l / h, according to DIN EN ISO 9237 at 20 cm. 2 and 200 Pa. Furthermore, the mineral wool preferably has a porosity of approximately 700 l / h to approximately 1900 l / h, according to DIN EN ISO 9237 at 20 cm. 2and 200 Pa. The porosity ensures a uniform flow of hot air through the mineral wool and the applied glass fleece, allowing the glass fleece impregnated with the foamed coating composition to dry evenly. Preferably, the mineral wool is dried at a drying temperature equal to or greater than the crosslinking temperature of the at least one binder, so that the at least one binder crosslinks in the glass fleece and imparts thermosetting properties to the glass fleece. Preferably, the drying temperature is in a range between approximately 120°C and approximately 280°C, more preferably from approximately 130°C to approximately 260°C, and particularly preferably from approximately 150°C to approximately 240°C.

[0026] The present invention further relates to a single-layer, dried mineral wool molded part provided with at least one layer of the aforementioned glass fleece. Preferably, the mineral wool molded part comprises at least one layer of glass fleece on at least one side of the mineral wool molded part, and more preferably on two opposite sides of the mineral wool molded part. The single-layer, dried mineral wool molded part provided with at least one layer of glass fleece is load-bearing. The mineral wool molded part is preferably in the form of a sheet or a solid web.The present invention further relates to a method for producing at least one-layer, dried mineral wool molded part described above, provided with at least one layer of glass fleece, wherein during drying of the mineral wool after its production at least one layer of the glass fleece described above is added to the mineral wool for bonding and crosslinking at a temperature equal to or greater than the crosslinking temperature of the at least one binder, so that thermosetting properties are imparted to the at least one layer of the glass fleece.

[0027] An exemplary glass fleece comprises glass fibers coated with a coating composition, wherein the coating composition comprises approximately 5 wt.% to approximately 50 wt.% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is substantially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermoset properties, and the coating composition is present on the glass fibers in a film-like form, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermoset film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups.

[0028] Another exemplary glass fleece comprises glass fibers coated with a coating composition, wherein the coating composition comprises approximately 10 wt.% to approximately 45 wt.% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermoset properties, and the coating composition is present on the glass fibers in a film-like form, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermoset film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups.

[0029] Another exemplary glass fleece comprises glass fibers coated with a coating composition, wherein the coating composition comprises approximately 15 wt.% to approximately 40 wt.% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermoset properties, and the coating composition is present on the glass fibers in a film-like form, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermoset film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups.

[0030] Another exemplary glass fleece comprises glass fibers coated with a coating composition, the coating composition comprising approximately 5 wt.% to approximately 50 wt.%.-% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermosetting film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups, wherein the glass fleece is air-permeable with an air permeability equal to or greater than approximately 200 l / h measured according to DIN EN ISO 9237 at 20 cm. 2and 200 Pa. The foamed coating composition is produced with a foam mixer from the coating composition comprising the aforementioned components. The foam density of the foamed coating composition is approximately 200 g / liter to approximately 1700 g / liter.

[0031] Another exemplary glass fleece comprises glass fibers coated with a coating composition, the coating composition comprising approximately 5 wt.% to approximately 50 wt.%.-% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermosetting film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups, wherein the glass fleece is air-permeable with an air permeability equal to or greater than approximately 500 l / h measured according to DIN EN ISO 9237 at 20 cm. 2and 200 Pa. The foamed coating composition is produced with a foam mixer from the coating composition comprising the aforementioned components. The foam density of the foamed coating composition is approximately 200 g / liter to approximately 1700 g / liter.

[0032] Another exemplary glass fleece comprises glass fibers coated with a coating composition, the coating composition comprising approximately 5 wt.% to approximately 50 wt.%.-% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers, wherein the at least one binder is heated to form a film in two independent sub-processes and can subsequently be thermally crosslinked to a thermosetting film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups, wherein the glass fleece is air-permeable with an air permeability equal to or greater than approximately 700 l / h measured according to DIN EN ISO 9237 at 20 cm. 2and 200 Pa. The foamed coating composition is produced with a foam mixer from the coating composition comprising the aforementioned components. The foam density of the foamed coating composition is approximately 200 g / liter to approximately 1700 g / liter.

[0033] Another exemplary glass fleece comprises glass fibers coated with a coating composition, the coating composition comprising approximately 5 wt.% to approximately 50 wt.%.-% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermosetting film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups, wherein the coating composition is present in an amount of about 100 g to about 1000 g per square meter of the coated glass fleece.

[0034] Another exemplary glass fleece comprises glass fibers coated with a coating composition, the coating composition comprising approximately 5 wt.% to approximately 50 wt.%.-% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermosetting film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups, wherein the coating composition is present in an amount of about 150 g to about 900 g per square meter of the coated glass fleece.

[0035] Another exemplary glass fleece comprises glass fibers coated with a coating composition, the coating composition comprising approximately 5 wt.% to approximately 50 wt.%.-% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is essentially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers, wherein the at least one binder is heated to form a film in two independent sub-processes and can then be thermally crosslinked to a thermosetting film in a further process, wherein the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups, wherein the coating composition is present in an amount of about 100 g to about 1000 g per square meter of the coated glass fleece.

[0036] The foregoing preferred embodiments of the invention are non-limiting, yet preferred examples. A combination of the aforementioned areas and components of each embodiment with one or more other embodiments is also possible.

[0037] The present invention is explained in more detail with reference to the following exemplary embodiments. Two exemplary embodiments are described in which a foamed coating composition is used, and one exemplary embodiment in which a non-foamed coating composition is used.

[0038] A glass fleece is produced from glass fibers in the form of a glass fiber mat and a coating. The glass fibers have a diameter of approximately 10–13 µm and a length of approximately 12 mm. The coating composition comprises a binder consisting of a polymer composition of a polycarboxylic acid and a polyhydric alcohol. The coating composition includes a filler based on aluminum hydroxide, a thickener based on modified polyether, a surfactant based on alkyl polyglucoside, a dispersant based on ammonium acrylate, and a water-repellent agent based on a non-fluorinated cationic water emulsion. The coating composition contains approximately 24 wt% binder, based on the total amount of the coating composition. The coating composition further comprises approximately 48 wt% filler, based on the total amount of the coating composition.The coating composition comprises approximately 23 wt% water based on the total amount of the coating composition. The coating composition comprises approximately 3 wt%, or alternatively approximately 0.2 wt%, of the thickening agent, based on the total amount of the coating composition, with adjustments to the percentage weights of the other components. The coating composition comprises approximately 0.1 wt% surfactant based on the total amount of the coating composition. The coating composition comprises approximately 0.1 wt% dispersant based on the total amount of the coating composition. The coating composition comprises approximately 1.8 wt% water repellenant based on the total amount of the coating composition. The binder has a curing temperature of approximately 150°C. The coating composition is used in foamed form, and the glass fibers are impregnated with it using an impregnation process.To produce the foamed coating composition, it is pumped through a foam mixer and whipped into a foam. The foamed coating composition has a density of approximately 1200 g / liter after mixing. The coating composition is present in a quantity of approximately 320 g per square meter of the coated glass fleece. The glass fleece is heated to a temperature of approximately 120°C. After heating, the coating composition forms a film on the glass fibers. The binder is not cross-linked. Cross-linking occurs above a certain temperature. The glass fleece is permeable with a permeability of approximately 850 l / h, measured according to DIN EN ISO 9237 at a depth of 20 cm. 3and 200 Pa. The glass fleece is flexible and is wound into a roll. The glass fleece is used for laminating mineral wool during the drying process in the mineral wool manufacturing process.

[0039] A single-layer, dried mineral wool molded part, reinforced with a layer of glass fleece, is produced. The glass fleece is unwound from a roll. The mineral wool is produced. The glass fleece is added to the mineral wool for bonding. The mineral wool, together with the discharged glass fleece, was dried at a drying temperature of approximately 240°C. This drying temperature is higher than the cross-linking temperature of the binder. This cross-linking process imparts thermosetting properties to the glass fleece. The resulting mineral wool molded part is load-bearing.

[0040] A glass fleece is produced from glass fibers in the form of a glass fiber mat and a coating. The glass fibers have a diameter of approximately 10–13 µm and a length of approximately 12 mm. The coating composition comprises a binder consisting of a polymer composition of a carboxylic acid and a polyhydric alcohol. The coating composition includes a filler based on aluminum hydroxide, a thickener based on modified polyether, a surfactant based on alkyl polyglucoside, a dispersant based on ammonium acrylate, and a water-repellent agent based on a non-fluorinated cationic water emulsion. The coating composition contains approximately 23% by weight of binder, based on the total amount of the coating composition. The coating composition further comprises approximately 48% by weight of filler, based on the total amount of the coating composition.The coating composition comprises approximately 27 wt% water, based on the total amount of the coating composition. The coating composition comprises approximately 0.2 wt% thickener, based on the total amount of the coating composition. The coating composition comprises approximately 0.1 wt% surfactant, based on the total amount of the coating composition. The coating composition comprises approximately 0.1 wt% dispersant, based on the total amount of the coating composition. The coating composition comprises approximately 1.7 wt% water repellenant, based on the total amount of the coating composition. The binder has a crosslinking temperature of approximately 150°C. The coating composition is used in foamed form, and the glass fibers are impregnated with it using an impregnation process.To produce the foamed coating composition, the coating composition, comprising the aforementioned components, is pumped through a foam mixer and aerated into a foam. The foamed coating composition after mixing has a density of approximately 1000 g / liter. The coating composition is present in a quantity of approximately 440 g per square meter of the coated glass fleece. The glass fleece is heated to a temperature of approximately 120°C. After heating, the coating composition forms a film on the glass fibers. The binder is not cross-linked. The binder can be cross-linked above a certain cross-linking temperature. The glass fleece is permeable with a permeability of approximately 850 l / h, measured according to DIN EN ISO 9237 at 20 cm. 3 and 200 Pa. The glass fleece is flexible and is wound into a roll.

[0041] The glass fleece produced in this way is used for inline lamination of mineral wool during the drying process in the production of the mineral wool.

[0042] A single-layer, dried mineral wool molded part, reinforced with a layer of glass fleece, is produced. The glass fleece is unwound from a roll. The mineral wool is produced. The glass fleece is added to the mineral wool for bonding. The mineral wool, together with the discharged glass fleece, was dried at a drying temperature of approximately 240°C. This drying temperature is higher than the cross-linking temperature of the binder. This cross-linking process imparts thermosetting properties to the glass fleece. The resulting mineral wool molded part is load-bearing.

[0043] A glass fleece is produced from glass fibers in the form of a glass fiber mat and a coating. The glass fibers have a diameter of approximately 10–13 µm and a length of approximately 12 mm. The coating composition comprises a binder consisting of a polymer composition of a carboxylic acid and a polyhydric alcohol. The coating composition includes a filler based on aluminum hydroxide and a dispersant based on ammonium acrylate. The coating composition contains approximately 16 wt% binder, based on the total amount of the coating composition. The coating composition further comprises approximately 56 wt% filler, based on the total amount of the coating composition. The coating composition contains approximately 27.9 wt% water, based on the total amount of the coating composition. The coating composition contains approximately 0.1 wt.-% dispersant, based on the total amount of the coating composition. The binder has a crosslinking temperature of approximately 150°C. The coating composition is used in non-foamed form, and the glass fibers are impregnated with it using an impregnation process. To produce the non-foamed coating composition, the coating composition, comprising the aforementioned components, is thoroughly mixed to form a homogeneous liquid dispersion. The coating composition is present at a quantity of approximately 370 g per square meter of the coated glass fleece. The glass fleece is heated to a temperature of approximately 120°C. After heating, the coating composition forms a film on the glass fibers. The binder is not crosslinked. The binder can be crosslinked above a certain crosslinking temperature. The glass fleece is permeable with a permeability of approximately 15 l / h, measured according to DIN EN ISO 9237 at 20 cm. 3and 200 Pa. The glass fleece is flexible and is wound into a roll. This glass fleece has a permeability of approximately 15 l / h, measured according to DIN EN ISO 9237 at 20 cm. 3 and 200 Pa is unsuitable for a final inline lamination of mineral wool.

Claims

Patent claims 1. Glass fleece made of glass fibers coated with a coating composition, wherein the coating composition comprises approximately 5 wt.% to approximately 50 wt.% of at least one binder, based on the total amount of the coating composition, wherein the at least one binder is substantially uncrosslinked and crosslinks upon drying of the glass fleece at a temperature equal to or greater than a crosslinking temperature of the at least one binder, forming thermosetting properties, and the coating composition is present in a film-like form on the glass fibers.

2. Glass fleece according to claim 1, characterized in that it is air-permeable with an air permeability equal to or greater than approximately 200 l / h, measured according to DIN EN ISO 9237 at 20 cm 2 and 200 Pa.

3. Glass fleece according to one or more of the preceding claims, characterized in that it can be wound into a roll.

4. Glass fleece according to one or more of the preceding claims, characterized in that the at least one binder is heated to form a film in two independent sub-processes and is subsequently thermally crosslinked to a thermosetting film in a further process.

5. Glass fleece according to one or more of the preceding claims, characterized in that the at least one binder is selected from a group comprising polymer compositions with acrylic, carboxylic acid and / or alcohol groups.

6. Glass fleece according to claim 5, characterized in that the at least one binder is selected from a group comprising a polymer composition of at least one polycarboxylic acid and at least one polyhydric alcohol.

7. Glass fleece according to one or more of the preceding claims, wherein indicates that the coating composition is present in an amount of approximately The amount of coated glass fleece is between 100 g and approximately 1000 g per square meter.

8. Method for producing a glass fleece according to one or more of the preceding claims, wherein glass fibers in the form of a glass fleece are mixed with a coating composition comprising about 5 wt.% to about 50 wt.% of at least one binder, and heated at a temperature at which the at least one binder does not crosslink, and wound into a roll.

9. Method according to claim 8, characterized in that the coating composition is used in foamed form.

10. Method according to one or more of claims 8 and 9, characterized in that the mixing with the coating composition takes place in an impregnation process and / or a doctor blade process.

11. Use of a glass fleece according to one or more of the preceding claims 1 to 7 for lamination of mineral wool during the drying process in the manufacture of the mineral wool or for lamination after the drying process of the mineral wool.

12. Use according to claim 11, characterized in that the drying of the mineral wool takes place at a temperature equal to or greater than the crosslinking temperature of the at least one binder, so that the at least one binder crosslinks in the glass fleece and imparts thermosetting properties to the glass fleece.

13. A single-layer, dried mineral wool molded part provided with at least one layer of glass fleece according to one or more of the preceding claims.

14. Method for producing a dried, at least single-layer mineral wool molded part provided with at least one layer of glass fleece according to claim 13, wherein during drying of the mineral wool after its production at least one layer of the glass fleece according to one or more of claims 1 to 7 The mineral wool is supplied for bonding and crosslinking at a temperature equal to or greater than the crosslinking temperature of the at least one binder, so that the at least one layer of the glass fleece is given thermosetting properties.