Saint-gobain Vetrotex France S.a.

Saint-gobain Technical Fabrics Europe

Leonardus Lucas

Michel Droux

Marc Berkhoff

Eric Daniel

The invention concerns a process for preparing a complex sheet comprising a layer of drylaid glass fibers and a layer of organic fibers, comprising: The so obtained complex fibrous structure shows a low tendency to delaminate and can be impregnated with asphalt or bitumen, and used in the field of roofing, sealing covering or membranes.

Complex comprising a drylaid veil of glass fibres, and a nonwoven fabric of organic fibres

A process for preparing a complex sheet including a layer of drylaid glass fibers and a layer of organic fibers. The process includes mechanical needling or fluid entanglement, e.g. hydroentanglement, of a nonwoven fabric of continuous organic fibers and of a veil of non-preconsolidated continuous glass fibers, the nonwoven fabric of organic fibers and the veil of glass fibers being juxtaposed and needles being sent from the same side as the nonwoven fabric of organic fibers, to make a sheet, and then application of a binder to the bilayer. The so obtained complex fibrous structure shows a low tendency to delaminate and can be impregnated with asphalt or bitumen, and can be used in the field of roofing, sealing covering, or membranes.

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Duiven, Netherlands

Leonardus Lucas