+86 133 9657 3533 sarah@rawwhitethread.com Keqiao, Shaoxing, Zhejiang, China
WhatsApp: +86 133 9657 3533
Factory Gallery
Production Process

From raw polyester filament to finished greige thread — our streamlined production process ensures consistent quality at every stage.

1

Raw Material

100% virgin polyester filament from Sinopec and Reliance. Strict incoming inspection.

2

Twisting

36 twisting machines. Precision TPM control within ±20 tolerance. Z or S twist available.

3

Auto Winding

24 automatic winding lines. Electronic clearing. Consistent package density and shape.

4

Quality Lab

In-house testing: tensile, twist, elongation, Uster evenness. Every batch certified.

Factory Capability
Company NameShaoxing Zhengyuan Thread Co., Ltd.
LocationKeqiao, Shaoxing, Zhejiang, China
Factory Area20,000 ㎡ (215,000 sq ft)
Established2013
Twisting Machines36 units (German & Japanese)
Auto Winding Lines24 lines (Electronic yarn clearers)
Monthly Output650+ tons
Annual Capacity8,000+ tons
Stock Inventory200+ tons ready for shipment
Quality LabIn-house (tensile, twist, elongation, Uster evenness)
CertificationsOeko-Tex Standard 100, ISO 9001:2015, SGS tested
PackagingCone / Dye tube / Skein — as per requirement
Loading PortShanghai / Ningbo (30-60 min from factory)
Main MarketsSoutheast Asia, Middle East, Africa, South America
DeliveryFOB / CIF / EXW — custom terms available
Quality Control

Every batch of our greige thread undergoes rigorous in-house testing before shipment. We maintain detailed QC records for traceability.

Physical Testing

Tensile strength, twist per meter, elongation at break, shrinkage, and hairiness tested on every production lot.

Evenness Testing

Uster evenness (CVm) and imperfection analysis ensures consistent yarn quality across all packages.

Batch Traceability

Each production lot is labeled and tracked. Detailed QC report provided with every shipment.

Third-Party Testing

SGS testing available upon request. Oeko-Tex and ISO 9001 compliance maintained across all production.