摘要:
A process for producing sized glass yarns, which entails: a) drawing streams of molten glass from orifices located at a bottom of one or more dies, in a form of one or more fans of continuous filaments, b) assembling the filaments into one or more moving supports, wherein a first stable composition having a viscosity of between 0.5 and 250 cP is deposited onto the surface of the continuous filaments, and a second stable composition, supplied separately from the first and having a viscosity of between 0.5 and 300 cP, is deposited onto the surface of the filaments of the yarns, at the earliest during deposition of the first composition and at the latest during collection of the years, the difference in viscosity between the two compositions deposited being less than 150 cP, the mixture of the deposited compositions functioning as a sizing composition and being polymerizable at room temperature.
摘要:
The invention relates to a process for manufacturing a continuous yarn, and the product obtained from such process. A multiplicity of continuous filaments are formed by the mechanical drawing of a multiplicity of streams of molten thermoplastic(s) flowing from the orifices of at least one fiberizing device. A mixture, in the liquid state, is deposited on the surface of at least some of the filaments before they are brought together into at least one yarn. An absorbent mat may be continuously impregnated, with at least some of said mixture being continuously taken up by means of a rotating roller in contact with said mat, and using a sizing roller, said mixture may be deposited on the filaments while they are being drawn.
摘要:
A process for manufacturing a continuous yarn, which entails the steps of: a) continously impregnating a mat of mechanically held-together fibers with a mixture of anhydrous size in a liquid state; b) continuosly taking up at least some of the mixture of the anhydrous size by a sizing roller in contact with the mat such that a liquid film having an almost constant thickness of less than 8 &mgr;m is formed thereon; and c) depositing the mixture of the anhydrous size, using the sizing roller, on a surface of at least some of a multiplicity of continuous filaments which are formed by mechanical drawing of at least a multiplicity of streams containing molten glass flowing out of orifices of at least one device.
摘要:
The present invention relates to a sizing composition for a glass yarn, consisting of a solution whose solvent content is less than 5% by weight, this solution comprising at least 60% by weight of polymerizable components, at least 60% by weight of these polymerizable components being components with a molecular mass of less than 750 and these polymerizable components comprising at least one mixture capable of polymerizing: of component(s) containing at least one reactive acrylic function and/or at least one reactive methacrylic function, and of component(s) containing at least one reactive primary amine function and/or at least one reactive secondary amine function, at least 20% of the polymerizable components containing at least two reactive functions chosen from acrylic, methacrylic, primary amine and secondary amine functions.
摘要:
The present invention relates to a method for preparing lamellar nanoparticles, the method including: a) mixing a laminated material with a blowing agent chosen from polyols to obtain an expanded laminated material, b) reacting the expanded laminated material with a grafting agent in the presence of water and an acid, said agent corresponding to the general formula RaXY4-a in which R represents a hydrogen atom or a hydrocarbon-based radical incorporating 1 to 40 carbon atoms, the R groups possibly being identical or different; X represents a silicon, zirconium or titanium atom; Y is an alkoxy group containing 1 to 12 carbon atoms, or a halogen; and a is equal to 1, 2 or 3; and c) recovering at least one lamellar nanoparticle.
摘要:
The present invention relates to reinforcement yarns coated with a sizing composition comprising at least one silane satisfying the formula: Si(R1)(R2)(R3)(R4) in which: R1, R2 and R3 are chosen from the following atoms or groups: —H (except in the case of R3), —Cl, —O—R5, —O—R6—O—R5, —O—(C═O)—R5, —O—R6—(C═O)—R5, R5 and R6 being chosen from hydrocarbon radicals whose main chain has from 1 to 4 carbon atoms; R4═—R7—NHR8 R7 being chosen from branched hydrocarbon radicals whose main chain has from 2 to 6 carbon atoms, R8 being chosen from the following groups: —H, —R9—NH2, —R10—NH—R9—NH2, R9 being chosen from hydrocarbon radicals containing 1 to 12 carbon atoms or from carbonyls, and R10 being chosen from hydrocarbon radicals whose main chain has from 1 to 6 carbon atoms. The glass yarns according to the invention are particularly suitable for reinforcing organic materials, the yarns and composites obtained resisting in a corrosive medium.
摘要:
A process and device for manufacturing cut threads according to which glass threads composed of continuous filaments are coated with a liquid non-aqueous size, which can react under the effect of actinic radiation. The threads are cut by a member which is also used to draw or entrain the threads mechanically before they are subjected to actinic radiation.
摘要:
The invention relates to a sizing composition composed of a solution comprising at least 5% by weight of solvent and comprising a thermally curable base system, said system comprising at least 60% by weight of components with a molecular mass of less than 750 and at least 60% by weight of components of a mixture exhibiting at least one epoxy reactive functional group, at least one amine, preferably primary or secondary amine, reactive functional group, and at least one hydroxyl reactive functional group. Another subject matter of the invention relates to the glass strands coated with the abovementioned sizing composition. The glass strands obtained are capable of being used to reinforce organic or inorganic materials.
摘要:
Method of manufacturing a frustoconical bobbin which is obtained by depositing superposed layers of a yarn onto a cylindrical support of longitudinal axis and comprises a base cone having a generatrix, an unwind cone having a generatrix and a main body having a generatrix which is inclined with respect to the axis and joins the two generatrices of the two cones. The method is characterized in that it comprises two rules governing the movement of the yarn guide, a first rule which is used to form part of the base cone, the last layer of yarn deposited according to this first rule going as far as the end of the unwind cone, and a second rule which is used to terminate the said base cone that has been started and, concomitantly, to form the main body and the unwind cone, the first layer of yarn deposited according to the second rule being parallel to the last layer deposited according to the first rule.
摘要:
The invention relates to a process for manufacturing continuous a glass fiber strand. The process consists in depositing on the glass filaments which are in the process of being drawn a sizing composition consisting of a solution of which the solvent content is less than 5 wt %, the solution comprising a mixture of constituents which can be polymerized and/or crosslinked by heat treatment, at least 60 wt % of the constituents being constituents of which the molecular weight (Mw) is less than 750, less than 10 weight % being film-forming agents and 0 to 25 weight % being coupling agents, lubricants, stabilizers and initiators and/or catalysts, it being possible if necessary for the agent to be polymerized and/or crosslinked by heat treatment, in winding the strand or strands, formed by collection of the filaments, on a rotating support so as to form a wound package consisting of turns of strand coated with a non-polymerized sizing composition. The strands are intended to reinforce thermoplastic or thermosetting organic substrates or substances of mineral origin.