Articles containing sprayed mineral wool

Abstract

The present invention relates to a thermal and / or acoustic insulation article comprising a mineral wool that is loose, the mineral wool comprising mineral fibers and adapted to be sprayed. According to the invention, the fibers have a population distribution of fiber lengths such that the ratio of the fiber length equal to the 90th percentile in the frequency distribution to the fiber length that is the median in the frequency distribution is greater than 3, the article comprising at least one additive and having a total additive weight percentage between 0.4% and 1.2%.

Description

[Technical Field]

[0001] The present invention relates to a heat-insulating and / or sound-insulating article comprising sprayed mineral wool, preferably glass wool, and a coating obtained by spraying such an article. [Background technology]

[0002] It is known that barriers in buildings, such as walls, floors, or the ground, can be thermally and / or acoustically insulated by depositing sprayed glass wool in contact with the barrier. The glass wool, compressed in a bag, undergoes a first expansion upon opening the bag. The glass wool is then introduced into a device configured to spray glass wool, such as one having a carder, where it undergoes a second expansion. The glass wool is then transported through a pneumatic conduit to the barrier to be insulated from the machine. This method allows for the covering of irregularly shaped barriers with glass wool. Furthermore, this method allows for a reduction in the volume of glass wool between its manufacture and use.

[0003] However, when depositing glass wool onto a barrier, a significant portion of the glass wool can become airborne. This airborne portion is classified as glass wool "dust." This dust poses a problem of user comfort during the application of glass wool.

[0004] It is known that adding mineral oil to glass wool reduces the amount of dust generated during the spraying process, thereby improving user comfort.

[0005] However, the addition of mineral oil to glass wool causes an increase in the thermal conductivity λ of the sprayed glass wool, which degrades the thermal and / or acoustic performance of the sprayed glass wool.

[0006] For this purpose, U.S. Patent Application Publication No. 2017 / 0198472 describes glass wool in which the mineral oil weight percentage is reduced compared to the prior art. The mineral oil weight percentage of the mineral wool described in U.S. Patent Application Publication No. 2017 / 0198472 is 0.1% to 0.6% of the total mass of the mineral wool.

[0007] However, the glass wool described in U.S. Patent Application Publication No. 2017 / 0198472 has high thermal conductivity with respect to a given density of glass wool installed on a barrier. Furthermore, the described glass wool causes a large amount of dust to be scattered into the surrounding atmosphere when sprayed. Therefore, there is a need to produce glass wool that has both low thermal conductivity with respect to a given installed density of glass wool and high installation comfort for the user. [Overview of the project] [Problems that the invention aims to solve]

[0008] One object of the present invention is to propose a thermal and / or acoustically insulating article that has a thermal conductivity lower than that of known mineral wool, while minimizing the amount of dust released when the article is installed by the user. [Means for solving the problem]

[0009] This objective is achieved within the scope of the present invention by a thermal and / or acoustically insulating article comprising loose mineral wool, the mineral wool comprising mineral fibers, suitable for spraying, and as follows:

[0010] - The fibers have a population distribution of fiber lengths such that the ratio of the fiber length equal to the 90th percentile in the frequency distribution to the fiber length that is the median in the frequency distribution is greater than 3, especially greater than 4, and preferably greater than 5.

[0011] - The article comprises at least one additive, the article having a weight percentage of the total of one or more additives, which is 0.4% to 1.2%, particularly 0.6% to 1%, preferably 0.7% to 0.9%.

[0012] The present invention is advantageously completed by the following features, individually or in any technically possible combination thereof: - The article has a micronaire of 4 L / min to 9 L / min, particularly 5 L / min to 8 L / min, preferably 6 L / min to 7.5 L / min. - In the frequency distribution, the fiber length equal to the 90th percentile is strictly greater than 1 mm, particularly strictly greater than 1.5 mm, and preferably strictly greater than 2.0 mm. - The median fiber length in the frequency distribution is 2 mm or less, especially less than 1 mm, and preferably between 300 μm and 700 μm. - Mineral wool is glass wool, and the article is preferably 100 kg·m -3 ~180kg·m -3 , especially 120 kg·m -3 ~160kg·m -3 Prioritizing 140 kg·m -3 ~160kg·m -3 It has a density of, - One or more additives include at least one additive selected from dustproofing additives, hydrophobic additives, antistatic additives, and dyes. - One or more additives include an antistatic agent, and the weight percentage of the antistatic agent is 0.01% to 0.30%, particularly 0.02% to 0.20%, and preferably 0.05% to 0.15%. - One or more additives include an antistatic agent, and the antistatic agent is selected from tertiary ammonium, quaternary ammonium, and polyethylene glycol. - One or more additives include a hydrophobic additive, and the weight percentage of the hydrophobic additive is 0.05% to 0.4%. - The average length of the fibers, depending on the number of fibers, is 0.5 mm to 1.5 mm. - The volume weighted median diameter of the fibers is from 5 μm to 15 μm, particularly from 6 μm to 12 μm, preferably from 7 μm to 10 μm, more preferably from 8 μm to 9 μm, - After the article is sprayed, 0.45 W·kg ·K -1 ·m -4 ~0.8 W·kg·K -1 ·m -4 and particularly 0.5 W·kg·K -1 ·m -4 ~0.75 W·kg·K -1 ·m -4 and can have a heat performance coefficient χ. - After the article is sprayed, 5 kg / m 3 ~18 kg / m 3 and particularly 7 kg / m 3 ~12 kg / m 3 and preferably 8.5 kg / m 3 ~11 kg / m 3 and can have a density. - One or more additives together form a spray deposit on the fibers, preferably a spray layer on the fibers, preferably by means of a liquid path.

[0013] Another aspect of the invention is a heat insulating and / or sound insulating coating obtained by spraying an article according to an embodiment of the invention.

[0014] The coating advantageously has a heat performance coefficient χ of 0.45 W·kg·K -1 ·m -4 ~0.8 W·kg·K -1 ·m -4 and particularly 0.5 W·kg·K -1 ·m -4 ~0.75 W·kg·K -1 ·m -4

[0015] The coating advantageously has a density of 5 kg / m 3 ~18 kg / m 3 and particularly 7 kg / m 3 ~12 kg / m 3 and preferably 8.5 kg / m​3 ~11kg / m 3 It has a density of that nature.

[0016] The coating is advantageous, at 35 mW·m -1 ·K -1 ~60mW·m -1 ·K -1 , especially 40mW·m -1 ·K -1 ~55mW·m -1 ·K -1 Prioritizing 45mW·m -1 ·K -1 ~52mW·m -1 ·K -1 It has thermal conductivity.

[0017] Another aspect of the present invention is a method for manufacturing an article according to one embodiment of the present invention, the method comprising spraying all of one or more additives onto a fiber through a liquid pathway.

[0018] Another aspect of the present invention is the use of an article according to one embodiment of the present invention for thermal and / or acoustic insulation of a building barrier.

[0019] Explanation of the diagram

[0020] Other features, purposes, and advantages of the present invention will become apparent from the following description. This is purely illustrative and non-limiting and should be read in conjunction with the accompanying drawings: [Brief explanation of the drawing]

[0021] [Figure 1] - Figure 1 shows the distribution of cumulative frequencies of fiber lengths of articles according to one embodiment of the present invention. [Figure 2] - Figure 2 schematically shows equipment for producing a shielding article according to one embodiment of the present invention. [Figure 3] - Figure 3 shows the cumulative average charge of mineral fibers in an article according to one embodiment of the present invention. [Modes for carrying out the invention]

[0022] In all figures, similar elements are given the same reference number.

[0023] definition

[0024] "Thermal performance coefficient χ" refers to W·m -1 ·K -1 The thermal conductivity λ and kg / m are expressed as follows: 3 The thermal performance coefficient χ represents the product of the density ρ of the article when sprayed according to one embodiment of the present invention. In a known form, the thermal performance coefficient χ represents the amount of mineral wool sprayed to obtain a given thermal resistance R on a barrier. In fact, considering a surface S that is blocked by a coating having mass m and volume V, the thermal performance coefficient χ is equal to the ratio of mass m on the one hand and the product of the thermal resistance R and the surface S on the other hand. Thus, the thermal performance of mineral wool can be determined by the product of a given thermal resistance R and the thermal performance coefficient χ.

[0025] "Spraying" of mineral wool means spraying as defined by the EN 14064-1:2007 standard, and preferentially refers to the spraying as defined by Annex C.2.1 of the EN 14064-1:2007 standard, "Cahier Technique 8, Confection des eprouvettes d'essais pour les produits en vrac, Indice de revision C, date de mise en application:01 / 07 / 2019, ACERMI".

[0026] Thermal conductivity is measured according to the measurement method defined in "Cahier Technique 8, Confection des eprouvettes d'essais pour les produits en vrac, Indice de revision C, date de mise en applicatio:01 / 07 / 2019, ACERMI," referring to the EN 14064-1:2007 standard.

[0027] The "density" of mineral wool refers to the value obtained by dividing the mass of mineral wool measured in a container filled with mineral wool by the volume of the container. In the case of mineral wool packaged in a transport bag, the density of the mineral wool is equal to the ratio of the mass of mineral wool compressed in the bag to the volume of the bag. In the case of sprayed mineral wool, the measurement of the density of sprayed mineral wool is defined in Annex C.2.1 of the EN 14064-1:2007 standard, "Cahier Technique 8, Confection des eprouvettes d'essais pour les produits en vrac, Indice de revision C, date de mise en application:01 / 07 / 2019, ACERMI".

[0028] In this application, the fineness of mineral wool fibers is determined by their micronaire values ​​under 5g. Micronaire, also known as the “fineness index,” represents the specific surface area of ​​the fiber. Micronaire measurement involves measuring the aerodynamic pressure drop when a predetermined amount of fiber extracted from an article is exposed to a gas (generally air or nitrogen) at a predetermined pressure. This measurement is a standard practice in mineral fiber production units, and it is standardized (according to DIN 53941 or ASTM D 1448 standards) and uses what is called a “micronaire tester.” The method for measuring micronaire is also described in International Publication No. 2003 / 098209.

[0029] Detailed description of the invention

[0030] General structure and aggregate distribution of fiber length of thermal / acoustic insulating articles

[0031] One aspect of the present invention is a thermal and / or acoustically insulating article comprising sparse mineral wool. Preferably, the mineral wool is glass wool, preferably in bulk form. The mineral wool contains mineral fibers. Glass wool, in known forms, contains glass fibers. Mineral fibers can be produced by melting inorganic raw materials, preferably glass, stone, and / or slag. The mineral wool is suitable for spraying.

[0032] Preferably, mineral fibers can be produced by melting glass having the following: - A weight percentage of SiO2 that is 50% to 75%, preferably 60% to 70%, and / or - A weight percentage of Na2O that is 10% to 25%, preferably 10% to 20%, and / or - A weight percentage of CaO that is 5% to 15%, preferably 5% to 10%, and / or - A weight percentage of MgO that is 1% to 10%, preferably 2% to 5%, and / or - The sum of the weight percentages of CaO and MgO, which is 5% to 20%, and / or - A weight percentage of B2O3 of 0% to 10%, particularly 2% to 8%, preferably 3% to 6%, more preferably 3.5% to 5%, and / or - Al2O3 in an amount of 0% to 8%, preferably 1% to 6%, and / or - A weight percentage of K2O of 0% to 5%, preferably 0.5% to 2%, and / or - The sum of the weight percentages of Na2O and K2O, which is 12% to 20%.

[0033] Referring to Figure 1, the fibers have a collective distribution of fiber lengths such that the ratio of the fiber length equal to the 90th percentile in the frequency distribution to the fiber length that is the median in the frequency distribution is greater than 3, especially greater than 4, and preferably greater than 5.

[0034] The article contains at least one additive. The article has a total weight percentage of one or more additives, which is 0.4% to 1.2%, particularly 0.6% to 1%, and preferably 0.7% to 0.9%.

[0035] The inventors have found that, in this way, it is possible to minimize the thermal conductivity of the coating formed by a sprayed article for a given amount of sprayed article, while suppressing the release of dust during the spraying of the article. In fact, the coating formed by the sprayed article has a large proportion of both short and long fibers, which allows for both the retention of certain fibers that cause dust release during coating application and the minimization of thermal conductivity compared to a coating containing only long fibers.

[0036] Some or all of one or more additives may be organic. The total weight percentage of one or more additives may be determined by loss on ignition in accordance with ISO 1887:2014 standard.

[0037] Barrier articles may have a binder content of less than 0.1%. In particular, barrier articles may not contain any binder and may have zero binder weight percent. However, trace amounts of binder may be present, especially if the article is manufactured by recycling glass wool containing binder.

[0038] For example, Figure 1 shows the cumulative frequency distribution of a group of fiber lengths of an article according to one embodiment of the present invention, where the fiber length equal to the 90th percentile (D90) in the frequency distribution is equal to 1856 μm, and the fiber length that is the median of the frequency distribution (D50) is equal to 335.7 μm. The illustrated distribution corresponds to an article in which the ratio of the fiber length equal to the 90th percentile in the frequency distribution to the fiber length that is the median in the frequency distribution is equal to 5.52.

[0039] Manufacturing of barrier articles

[0040] Referring to Figure 2, the apparatus for producing the barrier article may have a fiberization unit through which mineral fibers are produced. The fiberization unit may have a centrifugal separator 1 configured to rotate along a vertical axis X. The centrifugal separator 1 has a peripheral strip. The peripheral strip is perforated by a plurality of orifices through which molten material may flow from the inside of the centrifugal separator, forming filaments of the molten material.

[0041] The fiberization unit may also include a burner 2. The burner 2 may have an annular shape and may be positioned to bring a controlled temperature gas flow to the outlet of the orifice. The burner 2 allows the filaments exiting the orifice to be stretched, thereby forming mineral fibers. An annular inductor 3 may be positioned below the centrifuge. The annular inductor 3 allows the lower part of the centrifuge 1, in particular the spinner, to be heated. In this way, a web 4 of mineral fibers is formed. A belt 5 for receiving the mineral fibers may be positioned below the centrifuge 1.

[0042] Burner 2 is configured such that the temperature of the gas jet at the outlet of burner 2 is 1300°C to 1500°C, preferably about 1400°C. The pressure change of burner 2 that drives the gas jet allows for control of the fiber fineness: a relatively low burner pressure 2 can result in a relatively large fiber diameter.

[0043] The inventors have discovered that the proportion of long mineral fibers among all the mineral fibers produced can be significantly increased by reducing the momentum transmitted to the filament by the burner 2 at the orifice exit relative to known momentum, at the proportion described above. Therefore, the pressure of the burner 2 is 400 mmCE to 800 mmCE, particularly 400 mmCE to 450 mmCE (note that 1 mmCE = 9.81 Pa).

[0044] The rotational speed of the centrifugal separator 1 can be between 1600 and 3000 revolutions per minute, and more specifically between 2400 and 3000 revolutions per minute.

[0045] The tangential velocity of the orifice during the rotation of the centrifugal separator 1 can be 50 m / s to 80 m / s, preferably 57 m / s to 75 m / s. In this way, it is possible to increase the proportion of fibers having a length strictly greater than 1.5 mm, and preferably strictly greater than 2.0 mm, in the fiber population of the article. In fact, the length of the fibers can be increased by increasing the momentum supplied to the fibers from the outlet of the orifice. However, the momentum supplied to the fibers by the burner may be accompanied by the mechanical stress experienced by the fibers as they are pushed by the turbulent fluid downstream of the burner. These stresses can lead to fiber breakage. Thus, the tangential velocity of the orifice allows for sufficient momentum to be provided to the fibers while reducing the mechanical stress experienced by the fibers in a turbulent environment.

[0046] The daily fiber production per spinner orifice is equal to the throughput of molten material passing through each orifice per day. The daily fiber production per spinner orifice can be 0.30 kg / day to 0.8 kg / day, and particularly 0.4 kg / day to 0.7 kg / day. Preferably, the fiber production per orifice can be less than 0.40 kg / day. In this way, it is possible to reduce the diameter of the fibers with respect to the fibers produced at relatively high production rates, and thus it is possible to offset the effect of the reduction in momentum transmitted to the filament by the burner 2 at the outlet of the orifice.

[0047] The spinner of the centrifugal separator 2 may have at least 30,000 orifices if, for example, the diameter of the spinner is equal to 600 mm. Preferably, the spinner of the centrifugal separator 2 may have at least 36,000 orifices if, for example, the diameter of the spinner is equal to 400 mm. In this way, the production volume per orifice is small enough to generate fine fibers for a given total production volume, thereby offsetting the effect of reduced momentum transfer from the burner 2 to the filament at the orifice outlet.

[0048] The spinner of centrifugal separator 2 has a diameter of 50 mm to 800 mm, preferably 400 mm to 600 mm. The production volume of centrifugal separator 2 varies depending on the diameter of the spinner.

[0049] The orifice is formed and distributed across the drilling strip of the spinner. The height of the drilling strip is preferably less than 35 mm along the direction of the rotation axis X of the centrifuge. The diameter of the orifice is 0.5 to 1.1 mm.

[0050] The distance between the centers of adjacent orifices can be between 0.8 mm and 2 mm. This distance can vary by less than 10%, preferably less than 3%. The distance between the centers of adjacent orifices may decrease in the direction toward the lower part of the spinner.

[0051] The manufacturing method may include a step of recovering mineral fibers from belt 5. Following the recovery step, the manufacturing method may include a step of crushing the fibers, and then a step of compressing the fibers. The crushing step may be carried out to obtain an article according to one embodiment of the present invention.

[0052] The process of manufacturing an article may include spraying one or more additives in whole onto fibers via a liquid pathway. Therefore, the additives may be mixed before being sprayed onto the fibers, thereby ensuring uniform local concentrations. One aspect of the present invention is an article in which one or more additives together form a spray deposit, preferably a spray layer, on the fibers. Preferably, the deposit, preferably one or more layers, is formed by liquid spraying. In fact, the sprayed liquid containing one or more additives may be distributed homogeneously, partially or entirely, across the surface of the fibers, thereby forming a layer of additives after evaporation of the liquid solvent. The liquid may also come into contact with the fibers to form droplets or small droplets, thereby forming a droplet-shaped deposit of one or more additives after evaporation of the liquid solvent.

[0053] Structure and geometric shape of mineral wool

[0054] The average fiber length in the frequency distribution can range from 0.5 mm to 1.5 mm.

[0055] In the frequency distribution, the fiber length corresponding to the 90th percentile can be exactly over 1 mm, particularly exactly over 1.5 mm, and preferably exactly over 2.0 mm. In this way, it is possible to minimize the release of dust caused by spraying the material during the application of the coating.

[0056] The median fiber length in the frequency distribution is 2 mm or less, particularly less than 1 mm, and preferably between 300 μm and 700 μm.

[0057] The articles may have a micronere of 4 L / min to 9 L / min, particularly 5 L / min to 8 L / min, and preferably 6 L / min to 7.5 L / min. In this way, it is possible to minimize the radiant heat transfer of the coating formed by the sprayed articles, while suppressing the release of dust during the spraying of the articles by the weight percentage of additives in the articles.

[0058] The volume-loaded median diameter of the fibers is 5 μm to 15 μm, particularly 6 μm to 12 μm, preferably 7 μm to 10 μm, and more preferably 8 μm to 9 μm. In this way, it is possible to minimize the radiant heat transfer of the coating formed by the sprayed article for a given amount of sprayed article, while limiting the release of dust during spraying of the article due to the weight percentage of additives in the article.

[0059] The diameter and length of the fibers can be measured by depositing the fibers onto a substrate and then imaging the deposited fibers with a microscope. A sample of the article or coating can be taken using tweezers. Typically, 10 to 30 mg can be removed from the article or coating. The number of fibers to be measured is more than 1000, particularly more than 2000, and preferably more than 5000. Next, the fibers of the sample can be dispersed in a solvent. The solvent may contain a mixture of distilled water and glycerin, for example in a ratio of 500:1, and / or may contain a surfactant. The sample is stirred using a laboratory stirrer for 30 minutes to 2 hours, resulting in dispersion of the fibers in the solvent. Next, the fiber dispersion is diluted with distilled water in a ratio of 1:3 to 1:20. Next, the diluted fiber dispersion is deposited onto a substrate, for example, on the bottom of a Petri dish. Next, the fibers contained in the dispersion are imaged using a microscope provided with an objective lens with a magnification of, for example, 20x, 40x, or 90x, or using any other imaging system (camera, scanner) that allows observation of the fibers with sufficient resolution to evaluate their length. Image processing is then performed. In each image, pixel clusters of less than a few pixels, or pixel clusters with an eccentricity of less than 0.5, i.e., nearly circular particles, are ignored. Next, a wireframe is applied to each image to obtain the central axis of the fibers. Finally, a scoring function is used to evaluate the probability that two fiber segments belong to the same fiber. The scoring function is also used to reconstruct the fibers that were divided into fiber segments during the thresholding process.

[0060] additives

[0061] In all embodiments of the present invention, the article has a total weight percentage of one or more additives, which is 0.4% to 1.2%, particularly 0.6% to 1%, and preferably 0.7% to 0.9%. In this way, as described above and in combination with the collective distribution of fiber lengths, it is possible to maximize the thermal insulation of the article while suppressing dust release during installation. In fact, additives, which usually contain organic compounds, promote heat transfer through the article and thus reduce the thermal insulation properties provided by the sprayed article. In this specification, the total weight percentage of one or more additives is understood to mean all additives in the article. The total weight percentage of additives, which are additives having different properties, is calculated by summing the weight percentages of each additive only once. This definition of the total weight percentage of one or more additives does not exclude the fact that an additive has multiple functions. The functions may be selected from at least dustproofing, hydrophobicity, antistatic properties, and dyeing properties. The weight percentage of one or more additives having a predetermined function is calculated by summing the weight percentages of each additive having that predetermined function. This definition does not prevent the weight percentage of a first additive having both a first and a second function from being summed up with the weight percentages of one or more additives having a first function and the weight percentages of one or more additives having a second function.

[0062] One or more additives may be of any type. The one or more additives are preferably selected from dust-proofing additives, hydrophobic additives, antistatic additives, and dyes.

[0063] Thermal barrier articles may contain antistatic additives. The weight percentage of the antistatic additive may be 0.01% to 0.30%, particularly 0.02% to 0.20%, and preferably 0.05% to 0.15%.

[0064] The antistatic additive may be selected from at least tertiary ammonium, quaternary ammonium, and polyethylene glycol. Preferably, the antistatic additive comprises polyethylene glycol and at least one compound selected from tertiary and quaternary ammonium. The total weight percentage of tertiary and quaternary ammonium may be 0.01% to 0.25%, particularly 0.01% to 0.05%. The weight percentage of polyethylene glycol may be 0.03% to 0.20%, particularly 0.05% to 0.10%.

[0065] An antistatic additive may be sprayed onto the manufactured mineral fiber mat 4 following the process of forming the mineral fiber web 4 described above and / or following the process of crushing the fibers, for example, during the transport of the fibers in a pneumatic path. The antistatic additive makes it possible to increase the electrostatic charge value of the mineral fibers of the sprayed mineral wool. In this way, the mineral fibers do not adhere to the user's clothing when the coating obtained by the article sprayed onto the barrier is deposited. Referring to Figure 3, the electrostatic charge of the sprayed mineral wool can be measured by placing a mobile electrostatic sensor (e.g., a Keyence SK-050 model sensor) at the outlet of the conduit through which the sprayed article is transported to the barrier. This sensor measures the potential difference ΔV between the potential measured when the sprayed article is passing through the path and the potential measured at the same location when the sprayed article is not passing through the path, near the path through which the sprayed article is transported. The measured potential difference is proportional to the average charge of the fibers passing through the path and changes in the same direction. The sensor may be positioned, for example, at the outlet of a pneumatic conduit used to deposit sprayed mineral wool onto a barrier that is blocked.

[0066] The average charge of the mineral fibers sprayed onto the article can be zero or positive. In fact, the inventors have found that an average charge of zero or positive for the sprayed fibers is sufficient to observe the antistatic effect of the article on the wearer's clothing. "Average charge" refers to the average charge of the mineral fibers measured during the spraying of the article. Figure 3 shows the average charge of the fibers as a function of relative humidity (RH) levels.

[0067] The thermal insulation article may contain an antistatic additive. The additive is said to be "hydrophobic" if, when deposited in the mineral wool, it allows the insulation article to be hydrophobic. The hydrophobic additive may be sprayed onto the mineral fiber web 4 produced following the process of forming the mineral fiber web 4 described above. The weight percentage of the hydrophobic additive may be 0.05% to 0.4%, preferably 0.1% to 0.2%. The hydrophobic additive may be a silicone, such as polydimethylsiloxane (PDMS).

[0068] The heat-insulating article may contain a dustproof additive. The dustproof additive may be sprayed onto the resulting mineral fiber mat 4 following the process of forming the mineral fiber web 4 described above and / or following the process of crushing the fibers, for example, during the transport of the fibers in a pneumatic path. The dustproof additive reduces dust formation during the spraying of the wool, thus enhancing user comfort and preventing the mineral fibers from entering the user's airway. The dustproof additive may contain oils, particularly plant-derived oils and / or mineral-derived oils. Preferably, the weight percentage of the dustproof additive may be determined such that the article has a total weight percentage of one or more additives, ranging from 0.4% to 1.2%, such that the weight percentage of the antistatic additive is 0.01% to 0.30%, and the weight percentage of the hydrophobic additive is 0.05% to 0.4%. Preferably, the weight percentage of the dustproof additive is 0.34% to 1.14%.

[0069] Macroscopic properties, thermal properties, and energy consumption properties of the insulating material.

[0070] In the final step of the above-described method for manufacturing the article, particularly after the step of compressing the fibers, the article has a density greater than that of the coating obtained by spraying the article. The density is 100 kg·m³. -3 ~180kg·m -3 , especially 120 kg·m -3 ~160kg·m -3 Prioritizing 140 kg·m -3 ~160kg·m -3 This is possible. The density can be the density of the packaged article. Therefore, for the same volume, it is possible to make an article lighter than other known articles when packaged, while maintaining the collective distribution of fiber lengths of the article within this density range. As an example, a known article obtained from rock wool has a density of 200 kg·m. -3 It has an extremely high density. In this way, it is possible to facilitate the transportation of materials to the construction site. Materials containing mineral wool are preferably packaged in bulk. The materials can be compressed in a bag to have the density defined above.

[0071] Another aspect of the present invention is a thermal and / or acoustically insulating coating obtained by spraying an article according to one embodiment of the present invention.

[0072] Coatings, and indirectly articles, can be used for thermal and / or acoustic insulation of building barriers. Barriers can be selected from walls, floors, and ground. Barriers can be insulated by depositing coatings by spraying articles.

[0073] Preferably, the coating is 0.45 W·kg·K -1 ·m -4 ~0.8W·kg·K -1 ·m -4 , especially 0.5W·kg·K -1 ·m -4 ~0.75W·kg·K -1 ·m -4It has a thermal performance coefficient χ. In this way, depending on the characteristics of the article before spraying, it is possible to reduce both the consumption of the article for applying the coating with predetermined heat resistance, and the discharge of dust during the spraying of the article. The coating has a thermal performance coefficient of 35 mW·m -1 ·K -1 ~55mW·m -1 ·K -1 , especially 40mW·m -1 ·K -1 ~52mW·m -1 ·K -1 Prioritizing 43mW·m -1 ·K -1 ~49mW·m -1 ·K -1 It may have the thermal conductivity described above. In addition, preferably in combination with the thermal conductivity described above, the coating obtained by spraying an article according to one embodiment of the present invention has a thermal conductivity of 5 kg / m². 3 ~18kg / m 3 , especially 7 kg / m 3 ~12kg / m 3 Preferably 8.5 kg / m 3 ~11kg / m 3 It can have a density that is such that... This disclosure includes the following aspects: <Aspect 1> A thermal and / or acoustically insulating article comprising bulk glass wool, wherein the glass wool comprises mineral fibers and is suitable for spraying, and the article has the following characteristics: - The fiber has a population distribution of fiber lengths such that the ratio of the fiber length equal to the 90th percentile in the frequency distribution to the fiber length that is the median in the frequency distribution is greater than 3. - The article comprises at least one additive, and the article has a weight percentage of the sum of one or more of the additives, which is 0.4% to 1.2%, particularly 0.6% to 1%, and preferably 0.7% to 0.9%. An article having. <Aspect 2> The article according to embodiment 1, having a micronaire of 4 L / min to 9 L / min, particularly 5 L / min to 8 L / min, and preferably 6 L / min to 7.5 L / min. <Aspect 3> The article according to Embodiment 1 or Embodiment 2, wherein the fiber length equal to the 90th percentile in the frequency distribution is strictly greater than 1 mm, particularly strictly greater than 1.5 mm, and preferably strictly greater than 2.0 mm. <Aspect 4> The article according to any one of embodiments 1 to 3, wherein the median fiber length in the frequency distribution is 2 mm or less, particularly less than 1 mm, and preferably 300 μm to 700 μm. <Aspect 5> The aforementioned article weighs 100 kg·m -3 ~180kg·m -3 , especially 140 kg·m -3 ~160kg·m-3 An article according to any one of embodiments 1 to 4, having the density of [the specified density]. <Aspect 6> An article according to any one of embodiments 1 to 5, wherein one or more of the aforementioned additives include at least one additive selected from dustproofing additives, hydrophobic additives, antistatic additives, and dyes. <Aspect 7> An article according to any one of embodiments 1 to 4, wherein one or more of the additives include an antistatic additive, and the weight percentage of the antistatic additive is 0.01% to 0.30%, particularly 0.02% to 0.20%, and preferably 0.05% to 0.15%. <Aspect 8> An article according to any one of embodiments 1 to 7, wherein one or more of the additives include an antistatic additive, and the antistatic additive is selected from tertiary ammonium, quaternary ammonium, and polyethylene glycol. <Pattern 9> An article according to any one of embodiments 1 to 8, wherein one or more of the additives include a hydrophobic additive, and the weight percentage of the hydrophobic additive is 0.05% to 0.4%. <Aspect 10> The article according to any one of embodiments 1 to 9, wherein the average length of the fibers, based on the number of fibers, is 0.5 mm to 1.5 mm. <Aspect 11> The article according to any one of embodiments 1 to 10, wherein the volume-weighted median diameter of the aforementioned fibers is 5 μm to 15 μm, particularly 6 μm to 12 μm, and preferably 7 μm to 10 μm. <Aspect 12> After spraying, 0.45 W·kg·K -1 ·m -4 ~0.8W·kg·K -1 ·m -4 , especially 0.5W·kg·K -1 ·m -4 ~0.75W·kg·K -1 ·m -4 An article according to any one of embodiments 1 to 11, which may have a thermal performance coefficient χ. <Aspect 13> After the aforementioned article is sprayed, 5 kg / m 3 ~18kg / m 3 , especially 7 kg / m 3 ~12kg / m 3 , preferentially 8.5 kg / m 3 ~11kg / m 3 An article according to any one of embodiments 1 to 12, which can have a spray density of the following: <Aspect 14> An article according to any one of embodiments 1 to 13, wherein one or more of the additives together form a spray deposit on the fibers. <Aspect 15> A heat-insulating and / or sound-insulating coating obtained by spraying an article according to any one of embodiments 1 to 14. <Aspect 16> The aforementioned coating is 0.45 W·kg·K -1 ·m -4 ~0.8W·kg·K -1 ·m -4 , especially 0.5W·kg·K -1 ·m -4 ~0.75W·kg·K -1 ·m -4 The coating according to embodiment 15, having a thermal performance coefficient χ. <Aspect 17> The aforementioned coating is 5 kg / m 3 ~18kg / m 3 , especially 7 kg / m 3 ~12kg / m 3 , preferentially 8.5 kg / m 3 ~11kg / m 3 A coating according to embodiment 15 or embodiment 16, having density. <Aspect 18> The aforementioned coating is 35 mW·m -1 ·K -1 ~60mW·m -1 ·K -1 , especially 40mW·m -1 ·K -1 ~55mW·m -1 ·K -1 Prioritizing 45mW·m -1 ·K -1 ~52mW·m -1 ·K -1 A coating according to any one of embodiments 15 to 17, which has thermal conductivity. <Aspect 19> A method for manufacturing an article according to any of embodiments 1 to 14, comprising the step of spraying all of the one or more of the aforementioned additives onto the fibers via a liquid pathway. <Aspect 20> Use of the articles described in any of embodiments 1 to 14 for thermal and / or acoustic insulation of building barriers.

Claims

1. A thermal and / or acoustically insulating article comprising bulk glass wool, wherein the glass wool comprises mineral fibers and is intended to be sprayed, and the article has the following characteristics: - The fiber has a population distribution of fiber lengths such that the ratio of the fiber length equal to the 90th percentile in the frequency distribution to the fiber length that is the median in the frequency distribution is greater than 3. - The article comprises at least one additive, and the article has a weight percentage of the sum of one or more of the additives, which is 0.4% to 1.2%, particularly 0.6% to 1%, and preferably 0.7% to 0.9%. - One or more of the aforementioned additives include at least one additive selected from dust-proofing additives, hydrophobic additives, antistatic additives, and dyes. An article having.

2. The article according to claim 1, wherein the dust-proofing additive contains oil.

3. The article according to claim 1 or claim 2, wherein the fiber length equal to the 90th percentile in the frequency distribution is strictly greater than 1 mm, particularly strictly greater than 1.5 mm, and preferably strictly greater than 2.0 mm.

4. The article according to claim 1 or claim 2, wherein the median fiber length in the frequency distribution is 2 mm or less, particularly less than 1 mm, and preferably 300 μm to 700 μm.

5. The aforementioned article weighs 100 kg·m. －３ ~180 kg·m －３ , especially 140 kg·m －３ ~160 kg·m －３ The article according to claim 1 or claim 2, having the density of .

6. The article according to claim 1 or claim 2, wherein one or more of the additives include an antistatic additive, and the weight percentage of the antistatic additive is 0.01% to 0.30%, particularly 0.02% to 0.20%, and preferably 0.05% to 0.15% of the article.

7. The article according to claim 1 or claim 2, wherein one or more of the additives include an antistatic additive, and the antistatic additive is selected from tertiary ammonium, quaternary ammonium, and polyethylene glycol.

8. The article according to claim 1 or claim 2, wherein one or more of the additives include a hydrophobic additive, and the weight percentage of the hydrophobic additive is 0.05% to 0.4% of the article.

9. The article according to claim 1 or claim 2, wherein the average length of the fibers, based on the number of fibers, is 0.5 mm to 1.5 mm.

10. The article according to claim 1 or claim 2, wherein the volume-weighted median diameter of the fiber is 5 μm to 15 μm, particularly 6 μm to 12 μm, and preferably 7 μm to 10 μm.

11. After being sprayed, 0.45 W·kg·K －１ ·m －４ ~0.8 W·kg·K －１ ·m －４ , particularly 0.5 W·kg·K －１ ·m －４ ~0.75 W·kg·K －１ ·m －４ The article according to claim 1 or claim 2, which can have a heat performance coefficient χ of

12. The article according to claim 1 or 2, wherein one or more of the additives together form a spray deposit on the fibers.

13. A heat-insulating and / or sound-insulating coating obtained by spraying the article described in claim 1 or claim 2.

14. The aforementioned coating is 0.45 W·kg·K －１ ・m －４ ~0.8W・kg・K －１ ・m －４ , especially 0.5 W·kg·K －１ ・m －４ ~0.75W・kg・K －１ ・m －４ The coating according to claim 13, having a thermal performance coefficient χ.

15. The aforementioned coating is 5 kg / m ３ ~18 kg / m ３ , especially 7 kg / m ３ ~12 kg / m ３ , preferentially 8.5 kg / m ３ ~11 kg / m ３ The coating according to claim 13, having density.

16. The aforementioned coating is 35 mW·m －１ ・K －１ ~60 mW·m －１ ・K －１ , especially 40 mW·m －１ ・K －１ ~55 mW·m －１ ・K －１ Prioritizing 45 mW·m －１ ・K －１ ~52 mW·m －１ ・K －１ The coating according to claim 13, which has thermal conductivity.

17. A method for manufacturing an article according to claim 1 or claim 2, comprising the step of spraying all of the one or more of the additives onto the fibers via a liquid pathway.

18. Use of the article according to claim 1 or claim 2 for thermal and / or acoustic insulation of a building barrier.

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