Quality Control
Why Choose Our
Quality Control System
Every PET preform we produce passes through a rigorous multi-stage quality control process -- from raw material inspection to final shipment -- backed by 6 international certifications.
Our 5-Stage QC Process
Raw Material Inspection
Every batch of PET resin is tested for intrinsic viscosity, moisture content, and compliance with RoHS & REACH standards before entering production.
Precision Injection Molding
60+ automated injection molding machines operate under real-time monitoring, maintaining ±0.1mm dimensional accuracy with 5+ year experienced QC engineers on each line.
In-Process Visual Inspection
Dedicated QC personnel perform continuous visual checks for surface defects, color consistency, wall thickness uniformity, and gate quality throughout production.
100% Factory Final Inspection
Every single preform undergoes a full factory inspection before packaging. Weight, dimensions, clarity, and neck finish are verified against your exact specifications.
ISO 9001 Statistical Sampling
ISO 9001-compliant AQL sampling is conducted on every outgoing shipment, with full documentation and test reports available for each order upon request.
6 Global Certifications
QC Highlights
- Real-time SPC monitoring on all 60+ injection lines
- Full traceability from resin batch to finished shipment
- Dedicated QC engineers with 5+ years on each production line
- Third-party lab testing available on request (SGS/BV)
- Comprehensive COA & test reports provided with every order
Get full documentation -- certifications, COA, and test reports -- for your procurement team. We respond within 24 hours.