TorqTex Yarn Conversion
Flatter Torq yarn and conventional textured Tex yarn are processed separately on adjacent machine positions, then combined into one yarn, bringing together a sheer appearance and a textured finish.
The Torq component uses controlled, low levels of false twist to produce a bright, glossy yarn with a significantly flatter structure. The Tex component provides the character of conventional textured yarn.
Process and Conversion
Controlled Low Twist
TSP’s friction unit conversion guides the yarn across the twisting surface at a low angle to control twist insertion.
The process requires a linear texturing zone, as used on V type machines.
Reversible Conversion
The conversion allows a return to standard texturing operation.
No permanent modification to the friction unit is required.
S and Z Twist
The same conversion components accommodate both S and Z twist configurations.
Application Examples
Applications for yarns produced using the low twist process include ladies’ legwear and automotive trimmings.
Monofilament yarns have also been processed for vertical blinds.
Initial Setup Conditions
Tension Sensor Bypass
Low twist levels can increase T1 and T2 tensions beyond the normal operating range of the Unitens tension sensor.
Fit a ceramic guide above the tension sensor and route the yarn through this guide to bypass the sensor.
Draw Ratio
Lower twist levels allow a reduced draw ratio without adversely affecting surge speed.
Yarn Path and Cooling Track
Moving the cooling track back can reduce additional yarn path friction and process tension.
Heater Settings
Retain the normal primary heater temperature for the yarn.
Adjust crimp through the secondary heater; typical settings are 120–150°C.
Confirm the setup against the required yarn properties and operating conditions.
Twist Response
The chart shows the relationship between the D/Y parameter and twist level for one yarn example at the operating conditions shown.
TorqTex Twist Response
- Yarn Specification
- 250f34
- Process Speed
- 400 m/min
- Draw Ratio
- 1.60
| D/Y | Twist (TPI) |
|---|---|
| 0.60 | 6 |
| 0.70 | 18 |
| 0.80 | 27 |
| 0.90 | 31 |
| 1.00 | 32 |
| 1.10 | 11 |
Friction Unit Configurations
The illustrations show the S and Z twist configurations of the TorqTex conversion on a Barmag Type 8 friction unit.
S Twist
Z Twist
Yarn Combination
Combine suitable supply yarns and processing routes to develop the desired effect.
Application Matching
Assess machine capabilities against the target yarn structure and properties.
Development Support
Discuss reference samples, feed yarn options and practical production trials.