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

Product Description

‌I. Definition & Principle
Definition:‌
Pre-Oriented Yarn (POY) denotes a ‌partially oriented as-spun yarn‌ produced via high-speed spinning (3,000–6,000 m/min). Its molecular chains exhibit axial orientation but incomplete crystallization, requiring downstream processing (e.g., texturing into DTY) before weaving.

‌Principle:‌
Upon extrusion through the spinneret, the melt stream undergoes ‌drafting forces‌ induced by high-speed winding. The molecular chains are partially straightened and oriented along the fiber axis. Fibers with a core-skin structure have a relatively high molecular orientation in the skin layer, while the core layer remains in a disordered state and has a relatively low crystallinity. The fibers are strong, have a relatively low strength, a high elongation rate, and are easy to be stretched and deformed in the subsequent process.

‌II. Procession‌
POY yarn as a ‌semi-finished product‌ with Partial molecular orientation, high elongation, optimal processability for texturing & stretching, commonly used as primary feedstock for DTY production.

‌III. Technical Characteristics‌

IV. Applications & End-Uses‌
‌Primary‌: Feedstock for conventional DTY (knitting/weaving)
‌Specialty‌: Fine/ultra-fine denier textured yarns, mixed-filament/composite yarns

‌V. Key Process
(1) Raw Material Treatment
Polyester/polyamide chips must undergo pre-crystallization and drying to remove moisture and increase crystallinity.
(2) Melting & Filtration
The dried chips are melted by a screw extruder . The melt passes through a pre-filter to remove impurities and gel particles.
(3) Spinning & Cooling
The melt is precisely metered by a metering pump and delivered to the spinneret to form molten filaments.

‌VI. Critical Design Specifications‌
‌1. Equipment System‌
‌Screw Extruder‌: High L/D ratio with high-speed design ensuring melt homogeneity.
‌Filtration System‌: Dual-stage filtration (pre-filter + spin pack) with initial pack pressure.
‌Quenching System‌: Annular quenching unit enabling independent air volume/area adjustment for multi-variant production.
‌Winding Machine‌: High-speed operation, auto-doffing success rate >99%, stable unwinding tension.
‌2. Thermal & Kinematic Control‌
‌Temperature Management‌: Energy-efficient insulation for melt piping/spin beam, reducing energy consumption by 30% vs. conventional systems.
‌Speed Synchronization‌: Optimized coordination between spinning speed, quenching rate, and winding velocity .
‌3. Environmental Conditioning‌
Winding hall and RH maintained in an moderate level with minimized air turbulence.

‌VII. Other Technical Highlights
Energy-efficient design: bottom-mounted cup-type spin pack improves melt uniformity and reduces heat loss.
Flexible production: modular spinnerets and air-quenching system support rapid changeover between fine-denier and coarse-denier products.
Note: For POY production lines, melt quality and equipment stability must be maintained to ensure suitability for downstream DTY processing.

 
FAQ：

What Shengbang can do about the POY construction？
We focus on the development and engineering of POY spinning equipment for products such as PET, PA, PP, and PLA, covering the complete process chain from bottle-grade chips to partially oriented yarn. 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.