Saint-gobain Vetrotex France S.a.

Saint-gobain Technical Fabrics Europe

Saint-gobain Industries

Michel Droux

Marc Berkhoff

Eric Daniel

Carl Desaint Jean

Leonardus Lucas

Gilbert Bocquet

François Roederer

Manuela Astro

Filippo Mauri

A process for producing a veil comprising glass fibers and cellulose fibers which includes dispersing cellulose fibers and chopped glass fibers into a white water, forming a bed in a forming device by passage of the dispersion over a forming fabric through which the white water is drained off, the fibers being retained on the fabric and the dispersion including, during passage, a cationic white water, and performing a heat treatment step an oven device.

Manufacture of a veil made of glass and cellulose fibers in cationic medium

Method for making a fiber glass and cellulose mat in cationic medium

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.

The process according to the invention comprises: The PVOH fibers impart rigidity to the bed of fibers being formed. This process provides a veil with a very high tensile strength for low proportions of binder.

Veil with a PVOH fibre binding agent

A plant for the manufacture of mats formed of continuous yarns originating from bobbins and thrown onto a conveyor belt. The plant includes at least one bobbin supported on a spindle, a guide for guiding a fiber bundle leaving the bobbin, a mechanism for pulling the fiber bundle, and a mechanism for throwing the yarns that make up the fiber bundle onto the conveyor belt. The guide for guiding, the mechanism for pulling, and the mechanism for throwing the fiber bundle are fixed, located in the continuation of one another and at one and a same level. The throwing mechanism includes a swinging arm for throwing the yarn transversely to the conveyor belt and the guide is arranged such that the fiber bundle is paid out from the bobbin from the outside.

Method, installation for the production of mats and use associated therewith

Sizing compositions comprising a combination of several adhesive agents capable of being cross-linked, an acrylic polymer and a coupling agent, are used to treat glass fibers in order to provide improved plastic reinforcing fibers especially suited to use in sheet molding compounds whereby molded articles, particularly large pieces formed therefrom, will have improved reinforcement and surface characteristics.

Growing community of inventors

La Ravoire, France

Michel Droux