Isover Saint-Gobain

Other

Hans Furtak

Guy Berthier

Jean A Battigelli

Jean-Luc Bernard

Alain De Meringo

Sylvie Thelohan

Raymond Lejeune

Wilfrid Naber

Wolfgang Holstein

Daniel Sainte-Foi

Fabrice Lafon

Hartmut Tiesler

Serge Vignesoult

Enrique Garcia-Lopez

Jean L Bernard

James Ahart

Isabelle Cohen

Michel Opozda

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 subject of the invention is a mineral wool composition capable of dissolving in a physiological medium which comprises the constituents below, having to the following percentages by weight:

Artificial mineral wool composition

Method for the production of mineral wool

Method for producing mineral wool

The invention relates to the reception of fibers under fibering machines to obtain a mat of mineral wool. It proposes assigning to each fibering machine its own collecting zone, the surfaces of the collecting zones increasing in the direction of the increase of base weight. The invention also proposes a device characterized by the presence of two reception drums for three fibering machines.

Process for the reception of mineral fibers

The present invention relates to mineral fiber compositions useful for forming fibers which are readily degraded in a physiological medium such as that found within the human body. Advantageous compositions formed according to the present invention comprise the following components in the proportions by weight set forth below:

Mineral fibers decomposable in a physiological medium

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

Glass compositions useful for forming fibers which are readily able to be degraded in a physiological medium such as that found in a human body. Advantageous compositions formed according to the present invention comprise the following components, set forth in percent by weight:

Glass fibers decomposable in a physiological medium

Process and device for the reception of mineral fibers

A collection process for collecting mineral wool fibers produced by an aligned plurality of fiber making machines includes the steps of entraining the fibers produced by each of the fiber making machines in a gas, drawing the gas through a gas permeable conveyor belt substantially aligned with the aligned plurality of fiber making machines so as to collect the fibers on a fiber/gas separating surface defined by the conveyor, and advancing the conveyor with the collected fibers in a flow direction. The fibers from each of the fiber making machines is collected on the fiber/gas separating surface in a separate collection zone. The lengths of each of the collection zones increases along the flow direction. The resulting collected fibers are useful in forming a mat.

Mineral fiber collection process and device

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Speyer am Rhein, Germany

Hans Furtak