FDY Spinning Production Line with PET, PA , PP or Other Raw Material

Product Description

‌I. Definition & Principle
‌Definition:‌
Fully Drawn Yarn (FDY) denotes a ‌finished filament yarn‌ produced via integrated spin-drawing (spinning speed: 4,500–6,500 m/min). It exhibits ‌complete molecular orientation and crystallization‌, with stabilized structure enabling direct weaving applications.

‌Principle:‌
Utilizing multi-stage heated rollers for preheating, drawing, and annealing. FDY possess high molecular chain orientation, well-developed crystalline structure, and exceptional dimensional stability

‌II. Procession
FDY employs ‌integrated spin-drawing technology‌ (4,500–6,500 m/min), synchronizing drawing and heat-setting during spinning. This yields a ‌ready-to-weave yarn‌ with full orientation and crystallization.

‌III. Technical Characteristics‌
‌High tenacity & Low elongation‌
‌Dimensional stability‌ Boiling water shrinkage lower than HOY/DTY
‌Uniformity‌ Uster% superior to POY-processed yarns
One-step production‌ theory can eliminates post-drawing, enhancing efficiency

IV. Applicable Products & End-Uses‌
Apparel & ‌Industrial yarns‌: Silk-like fabrics, shirting, linings, sportswear, outdoor gear. Tire cords, conveyor belts (requires high-viscosity chips)
‌Speciale Applications‌:
‌Fine-denier FDY‌    Profiled spinneret    Luxury fabrics
‌Functional FDY‌    Masterbatch additives (color, antimicrobial, flame retardant)    Technical textiles
‌Industrial FDY‌    High-tenacity specifications    Reinforcement materials‌

V. Key Process
(1) Melt Extrusion
Polyester chips are dried under nitrogen protection and then fed into a screw extruder, where they are melted and compressed. The melt is transported to the spinning manifold after passing through a transfer line and a filter for purification.
Key Control Points: Melt delivery pressure  and temperature fluctuatio must be stabilized.
(2) Spinning Formation
The melt is extruded into fine streams through a multi-hole spinneret and then cooled and solidified in a cross-flow quench chamber.
Special Design: A slow-cooling device is employed to enhance fiber drawing performance, and a large-area cross-flow quench ensures uniform cooling.
(3) Drawing and Heat Setting
After moisture conditioning and oiling, the filament bundle enters a heated duct and undergoes mult-stage drawing using heated godet rollers.
(4) Interlacing and Winding
After drawing, the filament is passed through an interlacing nozzle to increase cohesion , and finally wound into packages.

VI. Key Design Requirements
(1) Equipment Selection
Extrusion System: Reinforced screw extruder equipped with a melt metering pump , with a moderate temperature control accuracy.
Godet Roller Configuration: set roller drawing unit, with precise draw ratio adjustment accuracy.
Winding Unit: Automatic doffing winder, with package formation acceptance rate >98%.
(2) Process Control
Ensuring high fiber tenacity and low shrinkage.

VII‌Complete Equipment Configuration‌
The FDY spinning system shares ‌fundamental similarities with POY equipment‌ but incorporates critical upgrades:
‌High-Precision Spin Beam Temperature Control‌.
precis thermal stability maintainance.
‌Multi-Stage Heated Godet System‌.
‌Integrated drawing and crystalline system.
‌Apply Ultra-High-Speed Winding Unit‌ to precisly control tension grade.

FAQ：

What Shengbang can do about the FDY construction？
We focus on the development and engineering of FDY spinning equipment for products such as PET, PA, PP, and PLA, covering the complete process chain from Melt Conveying and Metering, Ultra-High-Speed Spinning Formation, High-Speed Drawing and Orientation to Interlacing and Winding. Our scope includes raw material pretreatment, auxiliary equipment, utility systems, electrical controls, and full technical documentation, with key equipment such as extruders, winders, and pumps provided.

We offer full-cycle services—from feasibility studies to project commissioning—through a turnkey engineering model:
Feasibility Study
Consulting Services
Engineering Design & Construction
After-Sales Support for Equipment & Plant

The system makes full use of high-performance masterbatch technology and low-viscosity melt spinning processes, working efficiently with downstream weaving operations. It is focused on the production of high-performance raw materials for functional fibers and advanced technical textiles, ensuring full-capacity operation immediately after commissioning.