SAINT-GOBAIN ISOVER

An annular device for spraying a sizing composition onto mineral fibres includes at least one circuit for distributing the sizing composition and at least one spray nozzle in fluid communication with the circuit and arranged on a periphery of the annular spray device in order to spray the sizing composition onto fibres that pass through the annular spray device defined by an axis of revolution. The sizing composition is a binder based on biosourced products, and the at least one spray nozzle includes a spray head having a slot through which the binder leaves the annular spray device, the slot having a rectangular cross-section such as to form a fan of binder.

A burner suitable for stretching glass fibers, includes a ring-shaped combustion chamber opening onto a circular expansion slot, the direction of which is substantially parallel to the axis of the burner, and an injection system including at least one injector arranged to supply the combustion chamber with fuel and with oxidizer in the gaseous state, wherein the injector includes at least one angular deflection element suitable for generating a stream of oxidizer and/or fuel, the flow of which forms a swirl.

A method for improving the airtightness of a building or a room in a building, includes using a vapor barrier membrane on the inner face of the walls of the building or the room in the building, wherein the vapor barrier membrane is a humidity-regulating membrane including an active portion which includes a middle layer having a thickness of 2 μm to 200 μm, and consisting of a biopolymer having a water vapor permeability coefficient P 1 which increases with average relative humidity and which, when determined at 23° C. and at an average relative humidity of 25.5%, is at least 300 Barrers, and, on either side of the middle layer and in contact with the latter, two outer layers with a thickness of 100 nm to 20 μm, and consisting, independently of each other, of an organic polymer having both a water vapor permeability coefficient P 2 .

A module for evacuating smoke from an enclosure, including a main duct, wherein the module further includes a support base on which the main duct rests, the duct being surmounted by a variable duct closure system.

A glass composition for insulation fiber includes, in mass percentage:SiO 2 : between 62.0% and 65.0%, Na 2 O: between 14.0 and 15.5%, CaO: between 6.0 and 9.0%, MgO: between 1.5 and 4.0%, B 2 O 3 : between 5.5 and 7.5%, Al 2 O 3 : between 1.5 and 2.5%, K 2 O: between 0 and 2.0%, other oxide(s): between 0 and 5.0% by weight cumulatively, such as between 0 and 2.0% cumulatively, wherein the Na 2 O/B 2 O 3 ratio is between 1.90 and 2.80.

The invention relates to the field of materials based on mineral fibers, in particular mineral wool such as glass wool or rock wool. More specifically, the present invention relates to a method and a device for recycling the water recovered in a fiberizing and shaping method when using a specific acid binder based on monomeric polycarboxylic acid, or a salt of such an acid.

A layered structure of a flat, dimensionally stable building panel is provided including at least a first layer of dimensionally stable mineral wool; a second layer of an aluminum foil, which is arranged with a first large surface of the second layer on a first large surface of the first layer, wherein a third layer in the form of a woven reinforcing layer consisting predominantly of mineral fibers is arranged between a first large surface of the first layer and a first large surface of the second layer, the second large surface of the second layer being exposed to an environment and thus the second layer being the outermost layer. A self-supporting air duct made of the layered structure is also provided.

An insulating product includes mineral fibers of aluminosilicate glass including aluminum oxide, Al 2 O 3 , in a fraction by weight of between 14% and 28%, that are sized with a sizing composition including the following constituents within the limits defined below, expressed as fractions by weight with respect to the total weight of the composition: from 80% to 98% of water, from 2% to 20% of water-soluble poly(furfuryl alcohol), which is obtained by polycondensation of furfuryl alcohol, and less than 0.5% of furfuryl alcohol, wherein a sum of the fractions by weight of the poly(furfuryl alcohol) and of the water is at least 95%, and wherein the sizing composition applied to the mineral fibres has a pH in a range from 5 to 8.

A mineral wool having a chemical composition comprising the following constituents, as percentages by weight: SiO 2 39-50% Al 2 O 3 19.5-27% CaO 5-12% MgO 1-5% Na 2 O 5-20% K 2 O 0-15% Fe 2 O 3 2-15% B 2 O 3 0-2% a MgO/RO weight ratio of more than 0.10 and less than 0.50, and a RO/(RO+R 2 O) weight ratio of less than 0.55, in which RO represents the alkaline earth oxides CaO, MgO, BaO and SrO, and R 2 O represents the alkali oxides Na 2 O and K 2 O.

A facility for melting a composition of raw materials suitable for obtaining glass wool, rock wool, textile glass fibers and/or flat glass or hollow glassware, the facility including a melting chamber provided with at least one inlet, at least one outlet and at least one submerged burner proximal to the outlet. The facility includes a barrier arranged between the proximal burner and the outlet, which barrier is intended to limit the sloshing movement of the glass, in particular at the surface of the bath.