PU Discs
PU Discs
- High surface friction coefficient to minimize yarn slippage.
- Available in 86, 88, 90, 92 & 97 Shore hardness.
- High resistance to spin finish oil, heat, and electrostatic charges.
- 100% inspection for dimensional accuracy and vibration-free rotation.
Polyurethane Friction Discs
Polyurethane friction discs (PU discs) from Futai offer several structural and performance advantages, including a high surface coefficient of friction, minimal yarn slippage, uniform and effective twisting, reduced fiber damage, uniform dyeing, and high crimp properties in the finished DTY yarn.
Through the correct selection of Polyol & Isocyanate grades and special additives, our discs are engineered to withstand continuous high-speed rotation. They are highly resistant to spin finish oil, wear, and elevated temperatures, ensuring a prolonged service life that helps reduce operating costs.
Selection of Processing Conditions
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1. Draw Ratio Selection:
The remaining draw ratio for PU discs typically ranges from 25% to 30%. The draw ratio applied is generally higher than that used with ceramic discs and should be adjusted based on the denier and spinning speed of the feed POY yarn. -
2. Peripheral Speed to Yarn Speed Ratio (D/Y):
This ratio is directly related to yarn tension (T) and is generally optimized based on the ratio of twisting tension to untwisting tension. -
3. First Heater Temperature (Texturing Temp):
Because PU discs provide a strong grip with minimal slippage, a first heater temperature range of 180–220 °C is sufficient to achieve favorable plasticizing and texturing results. -
4. Second Heater Temperature:
Determined by the desired setting effect of the DTY yarn. For low-elasticity set yarn, temperatures are generally above 150 °C and may even exceed that of the first heater.
Common PU Disc Dimensions
We supply PU discs for all major texturing machine models, including: Rieter Scragg, ICBT, Temco, RPR, Murata, Barmag, Wuxi Hongyuan, Jingwei, Himson, SSM, Giudici, and Aalidhra.
| Item | Diameter (mm) | Bore (mm) | Thickness (mm) | Friction Unit Configuration |
|---|---|---|---|---|
| 1 | 45.0 | 12 | 6 | 1:4:1 - 1:7:1 |
| 2 | 45.5 | 12 | 6 | 1:4:1 - 1:7:1 |
| 3 | 46.0 | 12 | 6 | 1:4:1 - 1:7:1 |
| 4 | 46.5 | 12 | 6 | 1:4:1 - 1:7:1 |
| 5 | 47.5 | 12 | 6 | 1:4:1 - 1:7:1 |
| 6 | 49.7 | 12 | 6 | 1:4:1 - 1:7:1 |
| 7 | 50.0 | 12 | 6 | 1:4:1 - 1:7:1 |
| 8 | 51.2 | 12 | 6 | 1:4:1 - 1:7:1 |
| 9 | 52.0 | 12 | 9 | 1:3:1 - 1:7:1 |
| 10 | 52.0 | 14.45 | 9 | 1:3:1 - 1:7:1 |
| 11 | 52.8 | 12 | 9 | 1:3:1 - 1:7:1 |
| 12 | 54.0 | 12 | 9 | 1:3:1 - 1:7:1 |
| 13 | 54.5 | 12 | 9 | 1:3:1 - 1:7:1 |
| 14 | 56.0 | 14.45 | 9 | 1:3:1 - 1:7:1 |
| 15 | 58.0 | 12 | 9 | 1:3:1 - 1:7:1 |
| 16 | 58.0 | 14.45 | 9 | 1:3:1 - 1:7:1 |
| 17 | 59.0 | 12 | 9 | 1:3:1 - 1:7:1 |