How to test WPC for resistance to fungal growth in tropical outdoor environments?

Testing Wood-Plastic Composite (WPC) for resistance to fungal growth in tropical outdoor environments is essential to ensure long-term durability. Follow these steps for accurate evaluation:

1. Sample Preparation – Cut WPC samples into uniform sizes and expose them to high humidity (85-95%) and temperatures (25-35°C) to simulate tropical conditions.

2. Fungal Inoculation – Apply common tropical fungi (e.g., Aspergillus, Penicillium) onto the samples using standardized methods like ASTM G21.

3. Incubation – Store samples in a controlled chamber for 4-12 weeks, maintaining consistent moisture and temperature levels.

4. Visual & Microscopic Inspection – Check for fungal colonization, discoloration, and structural degradation.

5. Mechanical Testing – Assess changes in flexural strength and modulus to determine material integrity loss.

6. Data Analysis – Compare results against untreated or control samples to evaluate fungal resistance effectiveness.

Regular testing ensures WPC products withstand harsh tropical climates, preventing premature degradation.