Process for impregnating
AssigneePerstorp AB
InventorsAlan N. Syrop, Richard W. Eve, Stephen Temple
Life of this patent
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Abstract
A process for impregnating a continuous sheet of glass fibre web, paper, carbon fibre, cloth etc., which comprises feeding the sheet continuously into a closed vessel filled to a suitable height with a polymer solution, immersing the sheet under the surface of polymer solution while causing solvent boiling to occur and solvent vapor bubbles to flow out of the sheet, whereby bubbles of gas, such as air held or absorbed in the sheet during the immersion, are automatically removed from the sheet and then withdrawing the sheet from the vessel.
Claims12
A process for impregnating a continuous sheet of glass fibre web, paper, carbon fibre, cloth, which comprises feeding the sheet continuously into a closed vessel filled to a suitable height with a polymer solution, immersing the sheet under the surface of polymer solution while causing solvent boiling to occur and solvent vapour bubbles to flow out of the sheet, whereby bubbles of gas, such as air held or adsorbed in the sheet during the immersion, are automatically removed from the sheet and then withdrawing the sheet from the vessel.
A process for impregnating a continuous sheet of glass fibre or paper, which comprises passing the sheet continuously through a room with atmospheric pressure and a temperature of about 10.degree.-45.degree. C., feeding the sheet into a closed vessel filled to a suitable height with a solution of epoxy resin or phenol-formaldehyde resin, immersing the sheet under the surface of said polymer solution while causing solvent boiling to occur and solvent vapour bubbles to flow out of the sheet by arranging a temperature of about 15.degree.-150.degree. C., preferably 15.degree.-100.degree. C. and a pressure of about 0-900 m bar, preferably about 20-300 m bar in the vessel, whereby bubbles of gas, such as air held or adsorbed in the sheet during the immersion, are automatically removed from the sheet and then withdrawing the sheet from the vessel.
Dependencies are inferred from the claim text.