Essential details
MOQ:1000
Lead time:7 to 10 Days
Shipping:Sea transport, Land transport
Package Description:1000 KG/bag
Product Introduction
Sinopec XW321 is a medium viscosity fiber-grade PBT resin manufactured by Sinopec Yizheng Chemical Fiber Co., Ltd. It is specifically designed for spinning applications requiring excellent spinnability, uniform dyeing, and long filter service life.
This grade is widely used in the production of polyester yarns (POY, DTY, FDY), monofilament for brushes, wig fibers, and composite fiber applications. Its stable viscosity and high purity ensure consistent processing and high-quality end products.
We supply XW321 directly from Sinopec Yizheng, backed by our large-volume procurement and reliable supply chain.
| Feature | Description |
| Medium Viscosity (0.976 dL/g) | Balanced flow and strength for stable spinning |
| Excellent Spinnability | Suitable for POY, DTY, FDY processes |
| High Color Uniformity | Consistent dyeing results batch after batch |
| Long Filter Service Life | Reduces screen changes and increases productivity |
| Low Moisture & Ash Content | Minimizes defects and ensures high purity |
| Good Thermal Stability | Reliable performance under high-temperature processing |
Applications
Textile Fibers
POY, DTY, FDY polyester yarns (20D–600D)
POY, DTY, FDY polyester yarns (20D–600D)
Apparel fabrics, denim, elastic covered yarn
Medical bandages, adhesive tape backing
Monofilament & Brush Bristles
Paint brushes, cosmetic brushes
Paint brushes, cosmetic brushes
Toothbrush bristles
Wig Fibers
Wigs, hairpieces, beauty products
Wigs, hairpieces, beauty products
Composite Fibers
Co-spun with PET for specialized textile applications
Co-spun with PET for specialized textile applications
Quality Certificate – Sinopec GX112 (Batch: YZB46131B1)
The certificate below is issued by Sinopec Yizheng. Each shipment comes with its own original certificate.
| Parameter | Test Result | Specification |
| Intrinsic Viscosity | 0.976 dL/g | 0.980 ± 0.015 |
| Melting Point | 221.6°C | ≥ 223.0°C |
| Carboxyl End Groups | 18.6 mol/t | 22.0 ± 4.0 |
| Moisture | 0.04% | ≤ 0.40% |
| Ash Content | 114 mg/kg | ≤ 300 |
| b Value | 4.5 | 4.0 ± 2.0 |
