Unwinding machine for elastromeric fiber using OETO method
An elastomeric fiber can be easily unwound from a package by way of using an OETO unwinding device which comprises a fiber package, a standby package and a static guide such that the distance from the inlet orifice of the static guide to the center of the static guide-facing side of the fiber package is in the range of 25 to 38 cm, and the distance (R) between the centers of the static guide-facing sides of the fiber package and standby package is in the range of 25 to 50 cm.
1. An over-end-take-off (OETO) unwinding device for an elastomeric fiber which comprises:
(A) a frame,
(B) a fiber package and a standby package which are affixed to said frame by a package holder,
(C) a driven take-off roll for unwinding the fiber from the fiber package, and
(D) a static guide having an orifice for guiding the fiber unwound from the fiber package to the driven take-off roll, said static guide disposed on the frame such that the distance (d) from an inlet orifice of the static guide to the center of the static guide-facing side of the fiber package is in the range of 25 to 38 cm, and the distance (R) between the centers of the static guide-facing sides of the fiber package and standby package is in the range of 25 to 50 cm
wherein the elastomeric fiber includes an anti-tack agent which is added to a polyurethane polymer and formed by spinning the resulting mixture.
2. The unwinding device of claim 1 , wherein a roller guide is further positioned between the static guide and the driven take-off roll.
3. The unwinding device of claim 2 , wherein the roller guide is positioned such that the fiber coming out of the static guide is bent at a right angle towards the driven take-off roll.
4. The unwinding device of claim 2 , wherein a magnetic tensioner is further positioned between the roller guide and the driven take-off roll.
5. The unwinding device of claim 1 , wherein the anti-tack agent is a metal salt of a fatty acid selected from the group consisting of magnesium stearate, calcium stearate, sodium stearate and a mixture thereof.