Abstract: The invention relates to glass strands coated with a sizing composition which comprises, as film-forming adhesion agents, at least one polyester, at least one polyvinyl acetate and at least one polyurethane. The glass strands obtained are used as reinforcements in the manufacture of molded components comprising a thermostatic matrix by the open mold molding technique, in particular by simultaneous spraying of said strands and of resin, and of pipes by the centrifuging technique.

Abstract: An electrical connection device for supplying power to a bushing that delivers filaments, especially glass filaments. The device includes a connection jaw clamp and an electrical connection piece with no protective sheath and including a flexible body, having one end that is connected to the jaw clamp and a free opposite end.

Abstract: The invention relates to the manufacture of composite sheets having a multiaxial fibrous reinforcement, which involves: forming a unidirectional lap of reinforcing threads, at least 50% by weight of which are co-blended threads consisting of reinforcing filaments and of filaments of an organic material which are intimately mixed, giving the said lap a cohesion allowing it to be lapped, lapping this lap on a support in movement, in a transverse direction in relation to the direction of movement, heating the reinforcing-thread/organic-material assembly, which is displaced in the direction of movement, and setting it by the action of heat, if appropriate by applying pressure, then cooling it to form a composite band, and collecting the said band in the form of one or more composite sheets. The present invention also relates to an apparatus for carrying out the method and to the products obtained.

Abstract: The subject of the invention is glass strands coated with an essentially aqueous sizing composition which comprises the combination of at least one polyurethane A and at least one polyester B in an A/B weight ratio of less than or equal to 3, wherein the glass strands obtained are used to reinforce polymer matrices for the purpose of manufacturing translucent composites, particularly panels for lightweight roofs.

Abstract: The present invention relates to a process for manufacturing a moulded part, in which the moulded part is obtained by moulding at least one composite sandwich, the said sandwich incorporating an expansion agent that reacts during moulding. The invention also relates to the moulded part obtained and to the sandwich used.

Abstract: A method for preparing a mat, including: a) deposition or projection of threads onto a traveling belt to form a lap of the threads that are driven by the belt, then b) needling by bearded needles passing through the lap and being displaced in the direction of the lap at substantially the same speed as that when they pass through the lap, with a stroke density ranging from 1 to 25 strokes per cm2. By the method the mat obtained can easily be deformed by hand to be placed in a mold for manufacture of a composite material by injection of resin (RTM). The mat may also be incorporated into a preimpregnated sheet (SMC) and be molded under pressure.

Abstract: 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.

Abstract: Glass reinforcement strand, the composition of which comprises the following constituents, within the limits defined below, expressed as percentages by weight: SiO2 50 to 60%, preferably SiO2 ? 52% and/or SiO2 ? 57%; Al2O3 10 to 19%, preferably Al2O3 ? 13% and/or Al2O3 ? 17%; B2O3 16 to 25%; ZrO2 0.5 to 1.5%; Na2O ?1.5%, preferably Na2O ? 0.8%; K2O ?1.5%, preferably K2O ? 0.8%; R2O ?2%, preferably R2O ? 1%; CaO ?10%; MgO ?10%; F 0 to 2%; TiO2 0 to 3%; RO 4 to 15%, preferably RO ? 6% and/or RO ? 10%; and Various ?3%, where R2O = Na2O + K2O + Li2O, and RO = CaO + MgO. The dielectric properties of such glass compositions are particularly advantageous in the MHz and GHz ranges.

Abstract: The invention relates to glass strands coated with an essentially aqueous sizing composition which comprises the combination of at least one bissilane (A) of formula in which: R1, R2, R3, R4, R5 and R6, which are identical or different, represent a C1-C6, preferably C1-C3, alkyl radical, Z represents a C1-C6 hydrocarbonaceous chain which can comprise one or more N, O and/or S heteroatoms, and of at least one unsaturated monosilane (B) chosen from vinylsilanes and (meth)acrylosilanes. The glass strands obtained exhibit an improved ability to be cut which renders them capable of being used to reinforce polymers, in particular by moulding by simultaneous spraying.

Abstract: The invention relates to a process for manufacturing composite sheets, in which: a web of yarns, in the form of a mat of continuous yarns, a woven, a knit or an assembly of continuous non-interlaced yarns, is continuously deposited on a moving substrate, this web comprising at least one organic material and at least one reinforcing material; a powder of an organic material capable of forming a coating layer under the action of heat is deposited on at least one side of said web; the web coated with the powder is heated to a temperature sufficient to melt the powder; the web is compressed and cooled so as to form a composite strip; and the strip is cut in the form of sheets or wound up on a rotating support. The subject of the invention is also an installation for implementing the process and the products obtained.

Abstract: A winding machine including a frame. The frame includes at least one spindle configured to support at least one cake, the spindle being movable in rotation about a first axis substantially perpendicular to the diameter of the cake, and at least one positioning and guidance device configured to position and guide at least one thread on the rotating spindle. The spindle is mounted so as to be movable linearly along the first axis of rotation.

Abstract: A reinforcement device, especially for the bottom of a bushing having a multitude of holes from which filaments, e.g., glass filaments, are drawn, including a reinforcement piece that includes a hollow first part defining at least one receiving housing and a second part that extends at least partly over the length of the hollow part, and also at least one stiffener inserted into the receiving housing of the hollow part. The cross section of the stiffener is substantially identical to the internal cross section of the hollow part.

Abstract: A mat formed of continuous yarns made of alkali-resistant glass. A composite includes the mat and a cementing matrix.

Abstract: A heat exchanger device including at least one fin provided with a mechanism for blowing a fluid. The blowing mechanism includes at least one of the walls of the fin, the at least one of the walls having open porosity.

Abstract: The present invention relates to a sizing composition for glass yarns, especially in the form of staple glass yarns, comprising at least one fatty acid containing at least two ethylene bonds. The invention also relates to a process for manufacturing staple glass yarns using said sizing composition and to the staple glass yarn coated with the sizing composition.

Abstract: 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.

Abstract: The invention relates to a process for producing a veil comprising glass fibers and cellulose fibers which comprises: a step of dispersing cellulose fibers and chopped glass fibers into a white water; then a step of 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 said fabric and said dispersion comprising, during said passage, a cationic white water; and then a heat treatment step in an oven device. This process makes it possible in particular to produce a veil comprising 2 to 12 % cellulose, 70 to 80% glass; and 8 to 27 % binder the tear strength of which is greater than 430 gf.

Abstract: A strand based on glass fibres with a ? ? 2 ratio greater than 9, where ? is the yardage in tex and ? is the filament diameter in ?m.

Abstract: An electrical connection part for a fiberizing installation for delivering filaments, such as glass filaments, the part being made of an electrically conducting material and having at least one contact surface. The at least one contact surface is coated with gold.

Abstract: A method for making a composite material by continuously depositing glass yarns on a moving substrate, at least 80 wt % of the yarns being blended yarns consisting of intimately mixed glass filaments and thermoplastic organic material filaments, and the amount of deposited glass being equal to over 40 wt % of the total amount of material deposited in the form of glass yarns and organic material; transferring the combined glass yarns and organic material to a number of areas where they are heated, compressed and cooled, and specifically heated and/or cooled while simultaneously being compressed; and cutting the resulting assembly into plates or winding it onto a revolving drum.