Tacky polymer melt spinning process
A method for high speed melt spinning of binder fiber by melting a polymer having a melting temperature range of greater than 0° C. to 160° C., spinning said polymer at a speed of greater than about 2000 meters per minute to form the binder fibers; and winding the binder fiber onto a spin bobbin.
1. A method for high speed melt spinning of binder fiber comprising;
melting a polymer having a melting temperature range of greater than 0° C. to less than about 150° C., wherein said polymer comprises polyamides;
spinning said polymer at a speed of greater than about 2000 meters per minute to form said binder fiber; and
winding said binder fiber onto a spin bobbin, wherein unwinding tension of said binder fiber from said spin bobbin is less than 2.0 grams on average.
2. A method according to claim 1 , wherein said polymer comprises nylon 6/66/12 and 6/69.
3. A method according to claim 1 , wherein said polymer comprises nylon 6/66/12.
4. A method according to claim 1 , wherein said melting temperature range is greater than 0° C. to less than about 140° C.
5. A method according to claim 1 , wherein said speed is greater than about 2500 meters per minute.
6. A method according to claim 1 , wherein said speed is greater than about 3000 meters per minute.
7. A method according to claim 1 , wherein spin finish is placed on said binder fiber prior to said winding.
8. A method according to claim 1 , wherein unwinding tension of said binder fiber from said spin bobbin is less than 1.5 grams on average.
9. A method according to claim 1 , wherein unwinding tension of said binder fiber from said spin bobbin is less than 1.0 grams on average.
10. A method according to claim 1 , wherein said winding of said fiber comprises a speed substantially equal to said spinning speed.
11. A method according to claim 1 , wherein said polymer exhibits substantially no exothermic crystallization peak as measured by DSC when it is cooled to solidification from a molten state by test A.