" />
Spinnability
In theory, polyurethane cots are suitable for spinning
any variety, but it is recommended not to use them when spinning pure
polyester, medium and long fibers and other varieties with large draft ratio
and easy winding, which will cause damage to the cots; because the polyurethane
cots When the temperature rise exceeds 70 °C, the molecular strength of rubber
and its antistatic and anti-winding capabilities drop sharply, and the rubber
roller is easily worn, squeezed or gnawed. In addition, it is not suitable to
use polyurethane rubber rollers on high-speed draw frames with a drawing speed
greater than 300 m/min.
Surface treatment
Compared with the nitrile rubber roller, the polyurethane
rubber roller is not easy to absorb the coating, but after the two-component
coating treatment of 1:5~1:8, the anti-winding property is obviously improved;
it should be treated with ultraviolet light, but the lighting time and
intensity should be Reasonable setting, because the rubber roller after cooling
by ultraviolet light treatment has a better feel than when it is not
illuminated, and the anti-winding effect is better when getting on the car.