Process for preparing fibrous materials by wet method

Claim 1

A process for preparing a fibrous material by wet method from a starting solution for a fibrous material, which comprises: forming a coagulation bath containing an upper liquid phase and a lower liquid phase, said liquid phases being immiscible with each other, defining an interface area with each other, and at least one of the two liquid phases having a sufficient coagulating ability to make the starting solution into a gel, feeding the starting material to said interface area in the bath, spinning the starting solution and forming the fibrous material in the course of traveling in the interface area through the coagulation bath, and reeling the formed fibrous material, the relationship between coagulating values and specific gravities of said liquid phases and the specific gravity of said starting solution being (A) G 2 >G 1 ≧G 0 when P 1 ≦20≦P 2 , (b) g 0 ≧g 2 >g 1 when P 2 ≦20≦P 1 , and (C) G 2 ≧G 0 ≧G 1 when P 1 ≦20≦P 2 or P 2 ≦20≦P 1 , wherein G 0 is the specific gravity of the starting solution, G 1 is the specific gravity of the upper of said two liquid phases in said bath, G 2 is the specific gravity of the lower of said two liquid phases in said bath, P 1 is the coagulation value of said upper phase, and P 2 is the coagulation value of said lower phase.