Isover Saint-gobain

Isover Saint-gobain. 'les Miroirs'

Guy Berthier

Jean A Battigelli

Jean-Luc Bernard

Hans Furtak

Dominique Plantard

Daniel Sainte-Foi

Serge Vignesoult

Alain Giboult

Michel Opozda

Jean L Bernard

Gian Paolo Caccini

Christian Guillard

Bernard Gicquel

The only methods hitherto available for the production of mineral wool from materials such as basalt either utilize a stationary nozzle (blast drawing method) or external centrifuging whereby unsatisfactory yield and/or a not entirely satisfactory fiber quality, particularly with regard to a high content of unfiberized components, are achieved. By way of the invention, application of a fiberization method is suggested which, in spite of a high fluidity of the molten mineral material such as basalt, arrives at high quality fibers with a low bead proportion at good yield. This is made possible by selection of specific materials and their fiberization in specific conditions. Whereas fiberization of these fluid materials is carried out in external centrifuging at viscosities of a few tens of poises, fiberization by internal centrifuging at viscosities of more than 100 poises is required, according to the: invention, in order to achieve a mineral wool for insulation purposes with a low bead content.

Apparatus for manufacturing mineral wool

The present invention furnishes a device for fiberizing molten mineral materials in order to produce mineral fiber products by means of a spinner (2) having a multiplicity of orifices (6; 8) provided in the peripheral wall (4) thereof, for centrifuging molten mineral materials (10; 12) supplied to the spinner (2), with the spinner (2) comprising on the inside (14) of the peripheral wall (4) compartments (18; 20) arranged in sections and delimited by baffles (16) for separately feeding and separately receiving a respective molten material (10; 12) to at least one associated orifice (6; 8), with the orifices (6; 8) extending at least approximately in a radial direction through the peripheral wall (4). In the present invention a method for producing this device is moreover proposed.

Device for fiberizing molten mineral materials

The invention relates to a material based on inorganic fibres at least a proportion of which are multicomponent fibres and the cohesion and/or the geometry of which is (are) ensured, at least partially, by a sizing. It also relates to the use of this material for thermal and/or acoustic insulation.

Inorganic fibre material

Method for the production of mineral wool

Method for producing mineral wool

Discontinuous fibers are manufactured from a thermoplastic material having an elevated melting point by feeding molten thermoplastic material into a centrifugal chamber. The chamber includes a plurality of orifices through which the molten thermoplastic material is forced, thereby forming molten thermoplastic jets. Hot streams of gas are directed at these jets to convert the jets into thermoplastic fibers. Sizing agents including an emulsion or suspension in water, or an aqueous solution of active substances is sprayed onto the fibers. These sizing agents comprise no more than three active substances including a lubricating agent and an antistatic agent.

Method of producing discontinuous coated glass fibers

Fibers are drawn out by maintaining a temperature gradient between the interior and exterior walls of the peripheral band of a centrifuge. The peripheral band is made from a material having a thermal conductivity below 20 Wm.sup.-1 C.sup.-1 at 1000.degree. C. Application to the drawing out of fibers from glasses having a working range less than 100.degree. C. wide.

Method of producing fibers by internal centrifugation and the

The invention concerns the improvement of the fiber distribution in a web or mat, the attenuation of the fibers being effected by means of gas currents. The material delivered in the form of filaments is attenuated in a channel between two gas jets. At the outlet of the channel, the gas current carrying the fibers entrains the ambient air and passes through a guide apparatus containing two walls. The circulation of the air induced between the channel and the guide apparatus is modified by the interposition of baffles. The modification provides for improvement in the uniformity in the fiber web being made.

Growing community of inventors

Clermont, France

Guy Berthier