In the powder-coating raw material industry, reliability is built on one foundation—testing. Every batch of Resin, curing agent, additive, and filler must deliver predictable performance in extrusion, curing, film formation, and long-term durability. At PCOTEC, we have developed a rigorous testing system that combines scientific methodology, advanced equipment, and strict process discipline to ensure every product meets the highest industry standards. This article provides an inside look into how our testing standards safeguard quality and consistency for global customers.

1. A Structured Quality-Control Organization

PCOTEC’s QC department operates under a clearly defined structure that includes quality engineers, laboratory chemists, inspection specialists, and authorized release personnel. Each team member undergoes systematic training and must comply with strict SOPs (Standard Operating Procedures) to ensure all testing activities are executed accurately and traceably.
Our team is experienced in analytical chemistry, polymer science, and powder-coating performance evaluation, enabling us to perform both routine inspections and advanced technical assessments.

2. Full-Process Testing Workflow

Every batch follows a closed-loop QC workflow:
Raw material intake → Sampling → SOP-based testing → Data recording → Report generation → Compliance decision → Release or quarantine.

This workflow ensures that no product enters production or leaves the factory without meeting PCOTEC’s internal standards, which are more stringent than conventional industry norms. Reports include batch number, sampling details, test methods, results, requirements, and formal approval signatures.

3. Comprehensive Testing for Key Raw Material Categories

Different raw materials require different technical evaluations. PCOTEC applies tailored testing standards based on their functional roles in powder coatings.

Polyester Resins

Testing includes acid value, viscosity, color, moisture content, gel time, and solid content. These parameters ensure predictable reaction behavior during extrusion and consistent curing with TGIC or HAA systems.

TGIC and Other Curing Agents

Key indicators include epoxy equivalent, hydrolyzed chlorine content, melting point, color, volatiles, and purity. Controlling hydrolyzed chlorine is particularly critical for minimizing film defects and ensuring stable crosslinking.

Additives

Leveling agents, matting agents, accelerators, degassing agents, wax powders, and surface modifiers undergo compatibility testing, appearance evaluation, and melt-flow stability checks to verify their effectiveness across different resin systems.

Fillers

Titanium dioxide, barium sulfate, calcium carbonate, and silica are inspected for particle size distribution, whiteness, impurity levels, and moisture content to ensure consistent film appearance and mechanical strength.

4. In-Process Testing During Production

Testing does not stop after raw materials enter the factory. PCOTEC conducts additional inspections during production to prevent fluctuations and ensure adherence to specification windows.

• Esterification monitoring (for polyester resins)

• Reaction completeness checks (for TGIC)

• Temperature and pressure curve verification

• Moisture and impurity control during washing and filtration

• Homogeneity checks before dilution and packaging

These controls ensure that each process stage remains fully stable and traceable.

5. Finished-Product Testing Before Shipment

Before products are released, PCOTEC performs a final inspection based on internal standards and the customer’s technical requirements. This includes:

• Label and packaging verification

• Batch integrity verification (weight, quantity, packaging condition)

• Chemical and physical property checks

• Document review (COA, MSDS, test reports)

Only products with a green “Approved” label can be released for shipping, ensuring trust and reliability for every customer order.

6. Handling of Non-Conforming Products

PCOTEC maintains a strict process for isolating and handling non-conforming materials. Any deviation triggers an investigation across production, quality, and technical teams.
Products may undergo rework, downgraded usage, or disposal depending on severity. Root-cause analysis is performed to generate corrective and preventive measures, reinforcing continuous improvement across all departments.

7. Why Our Testing Standards Matter

In powder coating, small variations in raw materials can lead to major differences in flow, leveling, gloss, curing behavior, and durability. PCOTEC’s testing standards ensure:

• Consistent batch-to-batch performance

• Reliable curing and crosslinking

• Stable film formation and appearance

• Reduced risk of defects in customer production

• Full traceability and technical accountability

Through scientific testing, disciplined methodology, and advanced laboratory practices, PCOTEC provides customers with raw materials that are stable, dependable, and ready for high-performance applications.

Conclusion

Testing is more than a production requirement at PCOTEC—it is a culture. Our commitment to strict testing standards, professional QC procedures, and transparent reporting strengthens every part of the value chain. With a full range of analytical capabilities and reliable quality-control systems, we ensure our customers receive materials that perform consistently and support long-term success in powder coating applications.