| 摘要 |
PURPOSE:To obtain the title fiber having excellent workability free from end breakage in rewinding process by spinning elastic fiber blended with a specific crosslinking agent during melt spinning, providing the elastic fiber with a specific oil and winding. CONSTITUTION:Polyurethane elastic fiber is obtained by spinning using a polyisocyanate prepolymer as a crosslinking agent in melt spinning and immediately provided with 5-10wt.% based on amount of fiber of a mixed oil prepared by blending a mineral oil and/or a straight-chain polyorganosiloxane with 0.5-10wt.% one or more amino modified silicones shown by formula I and formula II (R is alkyl, etc.; R1 to R3 are alkyl; m and n are >=1) having <=15,000 amino equivalents and 5-10wt.% polyorganosiloxane having cyclic structure, wound, then rewound and covered to give the objective fiber. |
