| 摘要 |
1,133,733. Non-woven fabrics. FILZFABRIK FULDA G.m.b.H., C. WIRTH, F. WIRTH, E. SCHAFER and G. BITSCHNAU [trading as FILZFABRIK FULDA G.m.b.H. & CO.] 15 Nov., 1965 [23 Nov., 1964], No. 48439/65. Heading D1R. In a process for the continuous production of a non-woven fabric or needle felt, polyamide fibres are bonded together by continuous impregnation with an aqueous-alcoholic solution or emulsion of N-butylbenzenesulphonamide, followed by heating. In example II, the emulsion also contains ammonia, and the residue is washed out. In Example III, the solution also contains acetamide, and the residue is washed out. |
