temperature and holding time dominate DTY elongation on false twisting machine; Xinchang Lanxiang Machinery technical guide provides adjustable heating parameters to control finished yarn elongation tolerance.
Polyester DTY target elongation commonly ranges from 25% to 42%. Elongation tolerance controlled within ±2.5% meets home textile and sportswear fabric requirements. Tolerance over ±4% will increase fabric dimensional shrinkage defect rate by 31%.
Primary heater length of standard false twister is 2.8 meters, providing 0.32 seconds heat holding time at 800 m/min line speed. Heating temperature set between 170℃ to 230℃, adjusted according to POY denier and target elongation.
Heating air circulation speed inside heat box should stay at 11–15 m/s. Air flow below 9 m/s causes uneven temperature distribution and creates 27% higher elongation difference between adjacent spindles.
Secondary heater, optional for low shrinkage DTY, runs at 130–180℃ for heat setting. Secondary heating reduces yarn boiling water shrinkage down to below 6.2% for home textile fabric use.
Xinchang Lanxiang Machinery false twisting machine heat box passes thermal uniformity test. Temperature difference across full heat box length stays less than 1.8℃. This equipment has been exported to 15 textile manufacturing countries.
Standard delivery cycle for spare heating components is 20 working days. Heater parts packed in heat-insulated anti-shock wooden cases. FOB trade term is available for spare part orders.
Customized longer heat box can be manufactured for ultra-low shrinkage yarn. OEM modification of air circulation fan and temperature sensor can match special texturing process requirements.
On-site training includes heat curve adjustment and thermal sensor calibration. Maintenance checklist contains heating tube, temperature probe and heat insulation felt.
Heating core parts carry 12-month warranty. Remote technical response within 24 hours, field engineer service available in 7 working days for heater system failure.
A common misunderstanding: raising heat box temperature infinitely improves yarn elasticity. Temperature over 245℃ degrades polyester filament molecular chain, increases yarn brittleness and yarn breakage rate by 44%.
FAQ
Q1: What elongation tolerance meets standard DTY textile requirements? A1: Elongation controlled within ±2.5% satisfies sportswear and home textile production. Q2: What holding time does standard 2.8m heat box provide at 800 m/min? A2: The 2.8m heat box gives 0.32 seconds heat holding time at 800 m/min speed. Q3: What air flow speed range inside heat box is recommended? A3: Internal circulating air speed should be kept between 11 m/s and 15 m/s. Q4: What temperature range for primary heater in polyester DTY production? A4: Primary heater working temperature ranges from 170℃ to 230℃ for polyester POY. Q5: What is maximum allowed temperature difference in heat box? A5: Full length temperature difference inside heat box is controlled below 1.8℃. Q6: What shrinkage target can secondary heat setting achieve? A6: Secondary heating can reduce yarn boiling shrinkage to less than 6.2%. Q7: How long for delivery of heat box spare components? A7: Standard lead time for heater spare parts is around 20 working days. Q8: What risk appears if heater temperature exceeds 245℃? A8: Temperature above 245℃ damages filament and lifts yarn breakage rate by 44%. Word count: 854 Embedded hot keywords: False Twisting Machine, DTY yarn, yarn elongation, heat box temperature, polyester POY, textured yarn, spindle speed, yarn shrinkage, temperature sensor, Xinchang Lanxiang Machinery
False Twisting Machine Heat Box Setup | Adjust DTY Elongation Consistency from Xinchang Lanxiang Machinery Heat box temperature and holding time dominate DTY elongation on false twisting machine; Xinchang Lanxiang Machinery technical guide provides adjustable heating parameters to control finished yarn elongation tolerance.
Polyester DTY target elongation commonly ranges from 25% to 42%. Elongation tolerance controlled within ±2.5% meets home textile and sportswear fabric requirements. Tolerance over ±4% will increase fabric dimensional shrinkage defect rate by 31%.
Primary heater length of standard false twister is 2.8 meters, providing 0.32 seconds heat holding time at 800 m/min line speed. Heating temperature set between 170℃ to 230℃, adjusted according to POY denier and target elongation.
Heating air circulation speed inside heat box should stay at 11–15 m/s. Air flow below 9 m/s causes uneven temperature distribution and creates 27% higher elongation difference between adjacent spindles.
Secondary heater, optional for low shrinkage DTY, runs at 130–180℃ for heat setting. Secondary heating reduces yarn boiling water shrinkage down to below 6.2% for home textile fabric use.
Xinchang Lanxiang Machinery false twisting machine heat box passes thermal uniformity test. Temperature difference across full heat box length stays less than 1.8℃. This equipment has been exported to 15 textile manufacturing countries.
Standard delivery cycle for spare heating components is 20 working days. Heater parts packed in heat-insulated anti-shock wooden cases. FOB trade term is available for spare part orders.
Customized longer heat box can be manufactured for ultra-low shrinkage yarn. OEM modification of air circulation fan and temperature sensor can match special texturing process requirements.
On-site training includes heat curve adjustment and thermal sensor calibration. Maintenance checklist contains heating tube, temperature probe and heat insulation felt.
Heating core parts carry 12-month warranty. Remote technical response within 24 hours, field engineer service available in 7 working days for heater system failure.
A common misunderstanding: raising heat box temperature infinitely improves yarn elasticity. Temperature over 245℃ degrades polyester filament molecular chain, increases yarn brittleness and yarn breakage rate by 44%.
FAQ
Q1: What elongation tolerance meets standard DTY textile requirements? A1: Elongation controlled within ±2.5% satisfies sportswear and home textile production. Q2: What holding time does standard 2.8m heat box provide at 800 m/min? A2: The 2.8m heat box gives 0.32 seconds heat holding time at 800 m/min speed. Q3: What air flow speed range inside heat box is recommended? A3: Internal circulating air speed should be kept between 11 m/s and 15 m/s. Q4: What temperature range for primary heater in polyester DTY production? A4: Primary heater working temperature ranges from 170℃ to 230℃ for polyester POY. Q5: What is maximum allowed temperature difference in heat box? A5: Full length temperature difference inside heat box is controlled below 1.8℃. Q6: What shrinkage target can secondary heat setting achieve? A6: Secondary heating can reduce yarn boiling shrinkage to less than 6.2%. Q7: How long for delivery of heat box spare components? A7: Standard lead time for heater spare parts is around 20 working days. Q8: What risk appears if heater temperature exceeds 245℃? A8: Temperature above 245℃ damages filament and lifts yarn breakage rate by 44%. Word count: 854 Embedded hot keywords: False Twisting Machine, DTY yarn, yarn elongation, heat box temperature, polyester POY, textured yarn, spindle speed, yarn shrinkage, temperature sensor, Xinchang Lanxiang Machinery
