Classifications

• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/25—Non-macromolecular compounds
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C13/00—Fibre or filament compositions
  • C03C13/06—Mineral fibres, e.g. slag wool, mineral wool, rock wool
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/12—General methods of coating; Devices therefor
  • C03C25/14—Spraying
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/255—Oils, waxes, fats or derivatives thereof
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/26—Macromolecular compounds or prepolymers
  • C03C25/32—Macromolecular compounds or prepolymers obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
  • C03C25/10—Coating
  • C03C25/24—Coatings containing organic materials
  • C03C25/40—Organo-silicon compounds
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C3/00—Glass compositions
  • C03C3/04—Glass compositions containing silica
  • C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
  • C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
  • C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
• • E—FIXED CONSTRUCTIONS
  • E04—BUILDING
  • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
  • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
  • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
  • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
  • E04B1/76—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to heat only
  • E04B1/78—Heat insulating elements
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
  • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
  • C03B37/01—Manufacture of glass fibres or filaments
  • C03B37/04—Manufacture of glass fibres or filaments by using centrifugal force, e.g. spinning through radial orifices; Construction of the spinner cups therefor
• • C—CHEMISTRY; METALLURGY
  • C03—GLASS; MINERAL OR SLAG WOOL
  • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
  • C03C2217/00—Coatings on glass
  • C03C2217/70—Properties of coatings
  • C03C2217/76—Hydrophobic and oleophobic coatings

Definitions

• the present invention relates to a thermal and/or acoustic insulation product comprising blowing mineral wool, preferably glass wool, as well as a coating obtained by blowing such a product.
• document US 20170198472 describes a glass wool in which the mass content of mineral oil has been reduced with regard to the prior art.
• the mass content of mineral oil in the mineral wool described in document US 2017 0198472 is between 0.1% and 0.6% of the total mass of the mineral wool.
• the glass wool described by document US 2017 0198472 has a high thermal conductivity for a predetermined density of glass wool installed on a wall.
• the glass wool described causes a large quantity of dust dispersed in the ambient atmosphere during its blowing.
• An object of the invention is to provide a thermal and/or acoustic insulation product having a thermal conductivity less than or equal to the thermal conductivities of known mineral wools, while minimizing the quantity of dust emitted during the installation of the product by an user.
• thermo and/or acoustic insulation product comprising a mineral wool in bulk, the mineral wool comprising mineral fibers and being suitable for being blown,
• the product comprising at least one additive, the product having a mass content of all of the additive(s) comprised between 0.4% and 1.2% inclusive, in particular comprised between 0.6% and 1% inclusive and preferably comprised between 0.7 and 0.9% inclusive,
• the product has a micronaire of between 4 L/min and 9 L/min, in particular between 5 L/min and 8 L/min and preferably between 6 L/min and 7.5 L/min.
• a volume-weighted median diameter of the fibers is between 5 ⁇ m and 15 ⁇ m inclusive, in particular between 6 ⁇ m and 12 ⁇ m inclusive, and preferably between 7 ⁇ m and 10 ⁇ m inclusive, and more preferably between 8 ⁇ m and 9 ⁇ m inclusive ,
• the fibers have a distribution of a population of fiber lengths such that the ratio between the fiber length equal to the 90th percentile in number of the distribution and between the median fiber length in number of the distribution is greater than 3, in particular greater than 4, and preferably greater than 5,
• the fiber length equal to the 90th percentile in number of the distribution is strictly greater than 1 mm, in particular strictly greater than 1.5 mm and preferably strictly greater than 2.0 mm,
• the median fiber length in number of the distribution is less than or equal to 2 mm, in particular less than 1 mm and preferably between 300 ⁇ m and 700 ⁇ m,
• the mineral wool is glass wool, the product preferably having a density of between 100 kg.nr 3 and 180 kg.nr 3 inclusive, in particular between 120 kg.nr 3 and 160 kg.nr 3 inclusive and preferably comprised between 140 kg.nr 3 and 160 kg.nr 3 included,
• the additive or additives comprise at least one additive chosen from an anti-dust additive, a hydrophobic additive, an antistatic additive and a colorant,
• the additive or additives comprise an antistatic additive, a mass content of the antistatic additive being between 0.01% and 0.30% inclusive, in particular between 0.02% and 0.20% inclusive, and preferably between 0, 05% and 0.15% included,
• one or more additives comprise an antistatic additive
• the antistatic additive is chosen from a tertiary ammonium, a quaternary ammonium, and a polyethylene glycol
• the additive(s) comprise a hydrophobic additive, a mass content of the hydrophobic additive being between 0.05% and 0.4% inclusive,
• an average fiber length in number of fibers is between 0.5 mm and 1.5 mm inclusive
• the product is able to present, after having been blown, a thermal performance factor c of between 0.45 W.kg.K- 1 .nr 4 and 0.8 W.kg.K- 1 .nr 4 and in particular between 0.5 W.kg.K- 1 .nr 4 and 0.75 W.kg.K 1 .nr 4
• the product is able to present, after having been blown, a blown density of between 5 kg/m 3 and 18 kg/m 3 inclusive, in particular of between 7 kg/m 3 and 12 kg/m 3 inclusive and preferably comprised between 8.5 kg/m 3 and 11 kg/m 3 inclusive, - all of the additive(s) form sprayed deposits on the fibers, preferably a layer sprayed on the fibers, preferably by liquid route.
• Another aspect of the invention is a thermal and/or acoustic insulation coating obtained by blowing a product according to one embodiment of the invention.
• the coating advantageously has a thermal performance factor c of between 0.45 W.kg.K Lnr 4 and 0.8 W.kg.K 1 .nr 4 and in particular between 0.5 W.kg.K- 1 .rrr 4 and 0.75 W.kg.K- 1 .rrr 4 .
• the coating advantageously has a density of between 5 kg/m 3 and 18 kg/m 3 inclusive, in particular of between 7 kg/m 3 and 12 kg/m 3 inclusive and preferably of between 8.5 kg/m 3 and 11 kg/m 3 included.
• the coating advantageously has a thermal conductivity of between 35 mW.nr 1 .K ⁇ 1 and 60 mW.nr 1 .K ⁇ 1 inclusive, in particular between 40 mW.nr 1 .K- 1 and 55 mW.nr 1 .K ⁇ 1 included, and preferably between 45 mW.m 1 .K 1 and 52 mW.m 1 .K 1 included.
• Another aspect of the invention is a process for manufacturing a product according to one embodiment of the invention, the process comprising a step of spraying all of the additive(s) onto the fibers by liquid means.
• Another aspect of the invention is a use of a product, an embodiment of the invention, for the thermal and/or acoustic insulation of a wall of a building.
• FIG. 1 - Figure 1 illustrates a distribution of a cumulative frequency of a population of fiber lengths of a product according to one embodiment of the invention.
• FIG. 2 schematically illustrates an installation for producing an insulating product according to one embodiment of the invention
• FIG. 3 illustrates the average integrated charge of the mineral fibers of a product according to one embodiment of the invention, blown.
• thermal performance factor c is meant the product of the thermal conductivity l, expressed in W.nr 1 .K 1 , and the density p of a product according to one embodiment of the invention blown, expressed in kg/ m3 .
• the thermal performance factor c is, in known manner, representative of the quantity of mineral wool to be blown to obtain a predetermined thermal resistance R on a wall. Indeed, considering a surface S to be insulated by a coating of mass m and volume V, the thermal performance factor c is equal to the ratio between, on the one hand, the mass m and between, on the other hand, the product of the thermal resistance R and the area S.
• the thermal performance of mineral wool can be determined by the product of the predetermined thermal resistance R and the thermal performance factor X-
• blowing of a mineral wool is meant a blowing defined by standard EN 14064-1:2007, and preferably defined by the document "Cahier Technique 8, Preparation of test specimens for bulk products, Revision index C, date of application: 01/07/2019, ACERMI”, referring to appendix C.2.1 of standard EN 14064-1:2007.
• the thermal conductivity is measured according to the measurement defined in the document "Cahier Technique 8, Preparation of test specimens for bulk products, Revision index C, date of application: 07/01/2019, ACERMI", referring to standard EN 14064-1:2007.
• density of a mineral wool is understood to mean the mass of mineral wool measured in a container filled with the mineral wool, divided by the volume of the container. In the case of a mineral wool packaged in a bag enabling the mineral wool to be transported, the density of the mineral wool is equal to the ratio between the mass of the mineral wool compressed in the bag and between the volume of the bag.
• the fineness of the mineral wool fibers is determined by the value of their micronaire, under 5 g.
• the micronaire also called “fineness index”, is representative of the specific surface of the fibres.
• the measurement of the micronaire includes a measurement of the aerodynamic pressure drop when a given quantity of fibers extracted from the product is subjected to a given pressure of a gas, in general air or nitrogen. This measurement is usual in mineral fiber production units, it is standardized (DIN 53941 or ASTM D 1448 standards) and it uses a device called a “micronaire device”.
• the micronaire measurement method is also described in document WO 2003098209.
• the mineral wool is glass wool, preferably in bulk.
• Mineral wool includes mineral fibers.
• the glass wool comprises in known manner glass fibers.
• Mineral fibers can be produced by melting an inorganic raw material, preferably glass, stone, and/or slag. Mineral wool is suitable for being blown.
• the mineral fibers can be produced by melting a glass having:
• B 2 O 3 a mass content of B 2 O 3 comprised between 0% and 10%, in particular comprised between 2% and 8%, preferentially comprised between 3% and 6%, and more preferentially comprised between 3.5% and 5%; and or
• the product includes at least one additive.
• the product has a mass content of all of the additive(s) comprised between 0.4% and 1.2% inclusive, in particular comprised between 0.6% and 1% inclusive and preferably comprised between 0.7 and 0.9% inclusive .
• the product has a micronaire of between 4 L/min and 9 L/min, in particular between 5 L/min and 8 L/min and preferentially between 6 L/min and 7.5 L/min.
• the inventors have discovered that, due to the combination between the level of additive(s) previously defined and the micronaire of the product previously defined, it was possible to specifically minimize the radiative heat transfer of a coating formed by the blown product, for a predetermined quantity of blown product, while limiting the emission of dust during the blowing of the product, by the mass content of additives of the product.
• the capacity to break fine fibers of a product having the defined micronaire, and thus to emit dust is compensated by the rate of additive(s) of the product, while minimizing, for the defined ranges, the thermal conductivity of the coating formed by the blown product.
• Some or all of the additive(s) may be organic.
• the mass content of all of the additive(s) can be determined by measuring the loss on ignition, in accordance with the ISO 1887:2014 standard.
• the insulation product may have a binder mass content of less than 0.1%.
• the insulation product may be devoid of binder, and have a mass content of zero binder.
• traces of binder may be present, in particular when the product is manufactured by recycling glass wool comprising a binder.
• an installation for producing the insulating product may include a fiber-drawing unit, in which the mineral fibers are produced.
• the fiber drawing unit may comprise a centrifugation device 1 configured to rotate along a vertical axis X.
• the centrifugation device 1 has a peripheral band.
• the peripheral strip is pierced with a plurality of orifices, through which the molten raw material can flow from the inside of the centrifugation device to the outside, forming filaments of molten raw material.
• the drawing unit can also comprise a burner 2.
• the burner 2 can have an annular shape and be arranged so as to impose a gas flow at a controlled temperature at the outlet of the orifices.
• Burner 2 is used to stretch the filaments coming out of the orifices, so as to form the mineral fibers.
• An annular inductor 3 can be arranged below the centrifugation device. The annular inductor 3 makes it possible to heat a lower part of the centrifugation device 1, in particular the plate. A veil 4 of mineral fibers is thus formed. A reception mat 5 for the mineral fibers can be arranged under the centrifugation device 1.
• Burner 2 is configured so that the temperature of the gas jet leaving burner 2 is between 1300°C and 1500°C, preferably around 1400°C.
• the pressure variation of burner 2, driving the gas jet makes it possible to control the fineness of the fibres: a lower pressure of burner 2 can lead to a larger fiber diameter.
• the inventors have discovered that it is possible to significantly increase the proportion of long mineral fibers among all the mineral fibers produced, in the proportions described above, by reducing the quantity of movement transmitted by the burner 2 to the filaments in exit from the orifices with regard to the known transmitted momentum.
• the speed of rotation of the centrifugation device 1 can be between 1600 revolutions per minute and 3000 revolutions per minute, in particular between 2400 revolutions per minute and 3000 revolutions per minute.
• the tangential speed of the orifices, during the rotation of the centrifugation device 1, can be between 50 m/s and 80 m/s, and preferably between 57 m/s and 75 m/s.
• the length of the fibers can be increased by increasing the amount of movement given to the fibers from the outlet of the orifice.
• the quantity of movement imparted to the fibers by the burner may be concomitant with mechanical stresses undergone by the fibers driven by fluid turbulence, downstream of the burner. These stresses can lead to fiber breakage.
• the tangential speed of the orifices makes it possible to provide a sufficient quantity of movement to the fibers while reducing the mechanical stresses undergone by the fibers in a turbulent fluidic environment.
• the fiber pull per orifice of one plate per day is equal to the flow rate of molten raw material passing through each orifice per day.
• the pull of fibers per orifice of one dish per day can be between 0.30 kg/day and 0.8 kg/day, in particular between 0.4 kg/day and 0.7 kg/day.
• the fiber pull per orifice may be less than 0.40 kg/day.
• the plate of the centrifugation device 2 can comprise at least 30,000 orifices, for example when the diameter of the plate is equal to 600 mm.
• the plate of the centrifugation device 2 can comprise at least 36,000 orifices, for example when the diameter of the plate is equal to 400 mm.
• the pull per orifice is small enough to produce fine fibers, so as to counterbalance the effect of the reduction in the transmission of the quantity of movement of the burner 2 to the filaments leaving the orifices.
• the plate of the centrifugation device 2 has a diameter comprised between 50 mm and 800 mm, and preferably comprised between 400 mm and 600 mm.
• the pull of the centrifugation device 2 varies with the diameter of the plate.
• the orifices are formed and distributed over the drilling strip of the plate.
• the height of the piercing strip, in the direction of the axis of rotation X of the centrifugation device, is preferably less than 35 mm.
• the diameter of the orifices is between 0.5 and 1.1 mm.
• the distance between the centers of neighboring holes can be between 0.8 mm and 2 mm. This distance can vary by less than 10%, and preferably by less than 3%. The distance between the centers of neighboring holes may decrease in a direction towards the lower part of the dish.
• the manufacturing process can then include a step of recovering the mineral fibers on the carpet 5. Following the recovery step, the manufacturing process can include a step of grinding the fibers, then a step of compressing the fibers. The grinding step can also be implemented so as to obtain a product according to one embodiment of the invention.
• the process for manufacturing the product may comprise a step of spraying all of the additive(s) onto the fibers by a liquid route.
• the additives can be mixed before being sprayed on the fibers, so that their local concentrations are homogeneous.
• One aspect of the invention is a product in which all of the additive(s) form spray deposits on the fibers, preferably a spray coating on the fibers.
• the deposits preferentially the layer or layers, are formed by spraying by the liquid route.
• the sprayed liquid comprising the additive(s) can be distributed homogeneously over the surface of the fibers, in partly or entirely, so as to form a layer of additives after the evaporation of the solvent from the liquid.
• the liquid can also form drops or droplets in contact with the fibers, so that, after the evaporation of the solvent from the liquid, the additive or additives form deposits having the shape of a drop.
• the fibers can have a distribution of a population of fiber lengths such that the ratio between the fiber length equal to the 90th percentile in number of the distribution and between the median fiber length in number of the distribution is greater than 3, in particular greater than 4, and preferably greater than 5.
• a coating formed by the blown product has both a high proportion of short fibers and long fibers, which makes it possible both to retain certain fibers resulting in dust emission during the laying of the coating and at the same time to minimize the thermal conductivity with regard to a coating comprising only long fibers.
• FIG. 1 illustrates a distribution of a cumulative frequency of a population of fiber lengths of a product according to an embodiment of the invention for which the fiber length equals the ninetieth percentile ( D90) in number is equal to 1856 pm and the median fiber length (D50) in number is equal to 335.7 pm.
• the distribution illustrated corresponds to a product in which the ratio between the fiber length equal to the 90th percentile in number of the distribution and between the median fiber length in number of the distribution is equal to 5.52.
• An average length of the fibers in number of the distribution can be between 0.5 mm and 1.5 mm inclusive.
• a fiber length equal to the 90th percentile in number of the distribution can be strictly greater than 1 mm, in particular strictly greater than 1.5 mm and preferably strictly greater than 2.0 mm. Thus, it is possible to minimize the emission of dust when laying the coating by blowing the product.
• the number-median fiber length of the distribution may be less than or equal to 2 mm, in particular less than 1 mm and preferably between 300 ⁇ m and 700 ⁇ m.
• a volume-weighted median diameter of the fibers is between 5 ⁇ m and 15 ⁇ m inclusive, in particular between 6 ⁇ m and 12 ⁇ m inclusive, and preferably between 7 ⁇ m and 10 ⁇ m inclusive, and more preferably between 8 ⁇ m and 9 ⁇ m inclusive.
• Fiber diameter and length can be measured by depositing the fibers on a substrate and then imaging the deposited fibers with a microscope.
• a sample of the product or coating can be taken using forceps. Typically, between 10 and 30 mg of the product or coating can be taken.
• the number of fibers measured is greater than 1000, in particular greater than 2000 and preferably greater than 5000.
• the fibers of the sample can then be dispersed in a solvent.
• the solvent may comprise a mixture of distilled water and glycerine, for example in a 500:1 proportion, and/or comprise a surfactant.
• the sample is stirred using a laboratory stirrer between 30 minutes and 2 hours, which results in a dispersion of the fibers in the solvent.
• the fiber dispersion is then diluted in distilled water at a ratio of 1:3 to 1:20.
• the diluted fiber dispersion is then deposited on a substrate, for example on the bottom of a Petri dish.
• the fibers included in the dispersion are then imaged by a microscope equipped with an objective whose magnification is for example equal to 20X, 40X or 90X, or by any other imaging system (camera, scanner) making it possible to observe the fibers. at a sufficient resolution to appreciate their length.
• Image processing is then implemented. In each of the images, the groupings of pixels of less than a few pixels or whose eccentricity is less than 0.5, that is to say particles of roughly circular shape, are not considered.
• Skeletonization is then applied to each of the images, so as to obtain the median axis of the fibers. Finally, a score function is then used to evaluate the probability that two fiber segments belong to the same fiber. The score function is also used to reconstruct the fibers that were broken into fiber segments during the thresholding step.
• the product has a mass content of all of the additive(s) of between 0.4% and 1.2% inclusive, in particular between 0.6% and 1% inclusive and preferably between 0.7 and 0.9% inclusive.
• the additives which usually include organic compounds, promote heat transfer through the product and thus degrade the thermal insulation properties conferred by the blown product.
• the mass rate of all of the additive(s) is understood to mean all of the additives of the product.
• the mass content of all the additives, the additives having different natures, is calculated by summing the mass content of each of the additives only once.
• This definition of the mass rate of all of the additive(s) does not exclude that an additive has several functions.
• a function can be chosen at least from an anti-dust function, a hydrophobant function, an antistatic function and a dye function.
• the mass content of one or more additives having a determined function is calculated by summing the mass content of each of the additives having this determined function. This definition does not exclude that the mass rate of a first additive, having both a first function and a second function, is summed both in the mass rate of one or more additives having a first function and times in the mass content of one or more additives having a second function.
• the additive(s) can be of any type.
• the additive or additives are preferably chosen from an anti-dust additive, a hydrophobic additive, an antistatic additive and a colorant.
• the thermal insulation product may include an antistatic additive.
• a mass content of the antistatic additive can be between 0.01% and 0.30% inclusive, in particular between 0.02% and 0.20% inclusive, and preferably between 0.05% and 0.15% inclusive.
• the antistatic additive can be at least chosen from a tertiary ammonium, a quaternary ammonium, and a polyethylene glycol.
• the antistatic additive comprises a polyethylene glycol and at least one compound chosen from a tertiary ammonium and a quaternary ammonium.
• the total mass content of tertiary ammonium and quaternary ammonium can be between 0.01% and 0.25%, in particular between 0.01% and 0.05%.
• the mass content of the polyethylene glycol can be between 0.03% and 0.20%, in particular between 0.05% and 0.10%.
• the antistatic additive can be sprayed on the veil of mineral fibers 4 produced following the step of forming a veil 4 of mineral fibers previously described and/or following the step of grinding the fibers, for example during transport fibers in a pneumatic channel.
• the antistatic additive increases the value of the electrostatic charge of the mineral fibers of the blown mineral wool.
• the measurement of the electrostatic charge of the blown mineral wool can be implemented by arranging, at the outlet of the duct through which the blown product is brought to the wall to be insulated, a mobile electrostatic sensor (for example a Keyence SK-050 model sensor).
• the sensor measures an electric potential difference AV near a path through which the blown product is transported, between an electric potential measured during the passage of the blown product through the path and an electric potential measured at the same place, in the absence passage of the blown product through the path.
• the measured potential difference is proportional to the average charge of the fibers passing through the path, and evolves in the same direction.
• the sensor can, for example, be arranged at the outlet of a pneumatic pipe used to deposit the blown mineral wool on the wall to be insulated.
• the average charge of the blown mineral fibers of a product can be zero or positive. Indeed, it was discovered by the inventors that a zero or positive average charge of the blown fibers was a sufficient condition to observe an antistatic effect of the product on the clothing of the users.
• Average load means the average of the loads of the mineral fibers measured during product blowing.
• Figure 3 illustrates the average fiber load as a function of relative humidity (RH).
• the insulation product may include a hydrophobing additive.
• hydrophobant is meant an additive which, when deposited on the mineral wool, allows the insulation product to exhibit hydrophobic properties.
• the water-repellent additive can be sprayed on the veil 4 of mineral fibers produced following the step of forming a veil 4 of mineral fibers described above.
• a mass content of the hydrophobing additive can be between 0.05% and 0.4% inclusive, and preferably between 0.1% and 0.2%.
• the hydrophobing additive can be a silicone, for example polydimethylsiloxane (PDMS).
• the thermal insulation product may include an anti-dust additive.
• the anti-dust additive can be sprayed on the veil of mineral fibers 4 produced following the step of forming a veil 4 of mineral fibers described above and/or following the step of grinding the fibers, for example during fiber transport in a pneumatic channel.
• the anti-dust additive helps to reduce the formation of dust when blowing the wool to be blown, and thus makes it possible to increase the comfort of the user and to prevent the penetration of mineral fibers into the respiratory tract of the user.
• the anti-dust additive can comprise an oil, in particular an oil of vegetable origin and/or an oil of mineral origin.
• the mass rate of the anti-dust additive can be determined so that the product has a mass rate of all of the additive(s) of between 0.4% and 1.2% inclusive, so that the rate mass of the antistatic additive is between 0.01% and 0.30%, and so the mass content of the hydrophobing additive is between 0.05% and 0.4% inclusive.
• the mass content of the anti-dust additive is between 0.34% and 1.14%.
• the product has a higher density than that of a coating obtained by blowing the product.
• the density may be between 100 kg.nr 3 and 180 kg.nr 3 inclusive, in particular between 120 kg.nr 3 and 160 kg.nr 3 inclusive and preferably between 140 kg.nr 3 and 160 kg.nr 3 inclusive.
• the density may be the density of the packaged product.
• the product can be lighter when packaged than other known products, while preserving the fiber length population distribution of the product in this density range.
• the known products obtained from rock wool have a density greater than 200 kg.nr 3 . It is thus possible to facilitate the delivery of the product to a construction site.
• Another aspect of the invention is a thermal and/or acoustic insulation coating obtained by blowing a product according to one embodiment of the invention.
• the coating, and indirectly the product, can be used for the thermal and/or acoustic insulation of a wall of a building.
• the wall can be chosen from a wall, a ground and a floor.
• the wall can be insulated by depositing the coating by blowing the product.
• the coating has a thermal performance factor c of between 0.45 W.kg.K 1 .nr 4 and 0.8 W.kg.K 1 .nr 4 and in particular between 0.5 W.kg.K 1 .nr 4 and 0.75 W.kg.K- 1 .nr 4 .
• a thermal performance factor c of between 0.45 W.kg.K 1 .nr 4 and 0.8 W.kg.K 1 .nr 4 and in particular between 0.5 W.kg.K 1 .nr 4 and 0.75 W.kg.K- 1 .nr 4 .
• the coating may have a thermal conductivity of between 35 mW.nr 1 .K ⁇ 1 and 55 mW.nr 1 .K- 1 inclusive, in particular between 40 mW.nr 1 .K ⁇ 1 and 52 mW.nr 1 .K - 1 included, and preferably between 43 mW.nr 1 .K ⁇ 1 and 49 mW.nr 1 .K- 1 included.
• the coating, obtained by blowing a product according to one embodiment of the invention can have a density of between 5 kg/m 3 and 18 kg/m 3 inclusive, in particular between 7 kg/m 3 and 12 kg/m 3 inclusive, and preferably between 8.5 kg/m 3 and 11 kg/m 3 inclusive.

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• 2022
  • 2022-07-21 CA CA3224071A patent/CA3224071A1/fr active Pending
  • 2022-07-21 EP EP22757622.0A patent/EP4373788A1/de active Pending
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