An annular device (20) for spraying a sizing composition onto mineral fibres (3) comprises at least one circuit (24, 26) for distributing the sizing composition and at least one spray nozzle (22) in fluid communication with the distribution circuit and arranged on the periphery of the annular spray device in order to spray the sizing composition onto the fibres that pass through the annular spray device defined by an axis of revolution (X-X). According to the invention, the sizing composition is a binder based on biosourced products, and at least one spray nozzle comprises a spray head (36) having a slot (50) through which the biosourced-product-based binder leaves the annular spray device, said slot having a rectangular cross-section such as to form a flat jet of biosourced-product-based binder.

An annular device (20) for spraying a sizing composition onto mineral fibres (3) comprises at least one circuit (24, 26) for distributing the sizing composition and at least one spray nozzle (22) in fluid communication with the distribution circuit and arranged on the periphery of the annular spray device in order to spray the sizing composition onto the fibres that pass through the annular spray device defined by an axis of revolution (X-X). According to the invention, the sizing composition is a binder based on biosourced products, and at least one spray nozzle comprises a spray head (36) having a slot (50) through which the biosourced-product-based binder leaves the annular spray device, said slot having a rectangular cross-section such as to form a flat jet of biosourced-product-based binder.

A method measures inside a blanket of mineral and/or plant fibres being moved by at least one conveyor with a conveyor belt. The method uses a measuring system including a sensor and an actuator for introducing the sensor into the blanket, the actuator being mounted on the conveyor belt and able to move the sensor between a retracted position and a measuring position inside the blanket. The method also includes introducing the sensor into the blanket by the actuator under the effect of the movement of the conveyor belt.

A method measures inside a blanket of mineral and/or plant fibres being moved by at least one conveyor with a conveyor belt. The method uses a measuring system including a sensor and an actuator for introducing the sensor into the blanket, the actuator being mounted on the conveyor belt and able to move the sensor between a retracted position and a measuring position inside the blanket. The method also includes introducing the sensor into the blanket by the actuator under the effect of the movement of the conveyor belt.

A mineral wool panel, intended to be used as an acoustic panel, has a surface density of greater than or equal to 3.2 kg/m.sup.2, an air flow resistivity of between 30 and 120 kPa.Math.s/m.sup.2, and a Young's modulus of between 0.5 and 4 MPa.

Provided is a cooling water spray apparatus including a plurality of spinners disposed to be adjacent to one another along a travel path of a target to be cooled, and a plurality of cooling water spray holes provided on each spinner and configured to spray cooling water. The plurality of spinners may be non-overlappingly disposed with respect to one another.

Provided is a cooling water spray apparatus including a plurality of spinners disposed to be adjacent to one another along a travel path of a target to be cooled, and a plurality of cooling water spray holes provided on each spinner and configured to spray cooling water. The plurality of spinners may be non-overlappingly disposed with respect to one another.

A needled blanket is provided comprising melt-formed inorganic fibres having an overall composition in weight percent SiO.sub.2: 47 to 65%; AI.sub.2O.sub.3: 35 to 53%; the blanket having a shot content, of shot >45 m, of less than 51 wt %, a specific surface area [BET)>0.25 m.sup.2.Math.g.sup.1. also disclosed are fibres for producing such blankets, and self-supporting products made from such fibres.

An annular discharge device for discharging a gluing composition onto glass fibres includes at least one distribution circuit for the gluing composition and a plurality of spray nozzles fluidically connected with the distribution circuit and distributed over the perimeter of the annular discharge device for discharging the gluing composition onto the glass fibres intended to pass into the annular discharge device defined by an axis of revolution, each spray nozzle being oriented towards the interior of the annular discharge device with an angle of inclination determined in relation to the plane of revolution of the annular discharge device. At least two spray nozzles arranged consecutively on the perimeter of the annular discharge device are disposed so as to have an orientation with respect to the plane of revolution of the annular discharge device each with a different angle of inclination with respect to one another.

An apparatus for manufacturing a fiber reinforced resin material, by cutting long fiber bundles into a plurality of pieces having a predetermined length, and impregnating the cut fiber bundles with resin, includes a plurality of cutters each having a predetermined length and configured to cut the long fiber bundles, and a conveyance unit provided below the cutters and configured to continuously convey the fiber bundles cut with the cutters. The cutters are arranged along a conveying direction of the conveyance unit, such that respective longitudinal directions of the cutters form different angles with the conveying direction of the conveyance unit, when viewed from above the cutters.