Method of producing discontinuous coated glass fibers
AssigneeIsover Saint-Gobain "Les Miroirs"
InventorsChristian Guillard, Bernard Gicquel, Guy Berthier
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Abstract
Discontinuous fibers are manufactured from a thermoplastic material having an elevated melting point by feeding molten thermoplastic material into a centrifugal chamber. The chamber includes a plurality of orifices through which the molten thermoplastic material is forced, thereby forming molten thermoplastic jets. Hot streams of gas are directed at these jets to convert the jets into thermoplastic fibers. Sizing agents including an emulsion or suspension in water, or an aqueous solution of active substances is sprayed onto the fibers. These sizing agents comprise no more than three active substances including a lubricating agent and an antistatic agent.
Claims10
A method of producing discontinuous fibers from a glass material having an elevated melting point comprising
- feeding molten glass material into a centrifugal chamber, said chamber comprising a plurality of orifices wherein said molten glass material is forced therethrough forming a plurality of molten glass jets,
- directing hot streams of gas at said molten glass jets to form glass fibers therefrom,
- spraying said glass fibers with a sizing agent, said sizing agent comprising an emulsion or suspension in water, or an aqueous solution having no more than three active substances including a lubricating agent and an antistatic agent wherein the quantity of aid active substances deposited on said glass fibers after evaporation of said water in said aqueous solution is between 1 and 5 percent by weight relative to the weight of said glass fibers.
Dependencies are inferred from the claim text.