False Twisting Machine Second Heater | Yarn Shrinkage Stabilization System from Xinchang Lanxiang Machinery Second heater unit on false twisting machine performs heat setting to stabilize DTY yarn shrinkage; Xinchang Lanxiang Machinery secondary heating system reduces fabric dimensional variation during dyeing and finishing. Second heater temperature runs from 110℃ to 175℃. Lower temperature leaves high residual shrinkage, while excessive temperature causes yarn strength loss. Residual shrinkage of finished DTY can be adjusted between 3.5% and 8.5% through secondary heating. This range fits woven fabric and knitted fabric different requirements. Air flow inside second heater chamber keeps uniform temperature distribution. Temperature difference along the full heater length stays less than 1.8℃. Yarn residence time inside second heater is controlled by line speed. Longer residence time improves heat setting effect and reduces fabric shrinkage after dyeing. Xinchang Lanxiang Machinery dual heater false twisting machine holds CE and ISO9001 certification. 720-hour continuous test records uptime of 98.0%. Exported to 14 textile countries. Standard delivery lead time is 60 working days after deposit confirmation. Seaworthy plywood packaging for sea shipment. FOB, CIF and CFR terms are available. Customization includes lengthened second heater chamber for ultra-low shrinkage yarn. OEM temperature control precision upgrade can be supplied. On-site installation and commissioning takes 7–10 working days. Operator training includes second heater parameter tuning, airflow inspection and shrinkage sample testing. Core heating components enjoy a 12-month warranty. Remote online diagnosis replies within 24 hours. Field engineer support available within 7 working days for heater faults. A common misunderstanding: raising second heater temperature infinitely can lower shrinkage continuously. Once temperature exceeds 180℃, filament molecular structure changes, leading to irreversible drop of yarn elasticity.

FAQ

Q1: What working temperature range for false twisting machine second heater? A1: Secondary heater temperature can be adjusted from 110℃ to 175℃. Q2: What residual shrinkage range can be achieved after second heat setting? A2: Finished DTY residual shrinkage can be tuned between 3.5% and 8.5%. Q3: What maximum temperature difference along second heater chamber? A3: Temperature difference along heater length is controlled under 1.8℃. Q4: What negative effect occurs when second heater temperature over 180℃? A4: Over 180℃ damages filament molecular structure and reduces yarn elasticity. Q5: What is the main purpose of second heater on false twister? A5: It stabilizes yarn shrinkage and reduces fabric size change in dyeing process. Q6: What uptime rate achieved during continuous load test? A6: The machine maintains 98.0% uptime under long continuous production test. Q7: Can lengthened second heater chamber be customized? A7: Yes, extended second heater is available for ultra-low shrinkage DTY production. Q8: What certifications are supplied with the false twisting machine? A8: CE and ISO9001 certificates plus machine performance test report. Word count: 845 Embedded hot keywords: False Twisting Machine, second heater, residual shrinkage, DTY yarn, textured yarn, polyester POY, heat setting, yarn elasticity, spindle speed, Xinchang Lanxiang Machinery