In recent months, particularly during April and May, northern regions such as Linyi, Xuzhou, and Henan have experienced seasonal high temperatures accompanied by the widespread presence of willow and poplar fluff. This weather has significantly impacted the bonding performance of Film Faced Plywood (FFP). The rising temperatures have caused delays in pre-pressing and hot-pressing processes in some plywood factories, leading to premature aging of the adhesive in the core veneer and surface layers. As a result, many finished plywood panels have exhibited defects such as delamination, surface blistering, and peeling.
During this period, our quality inspections across multiple factories revealed varying degrees of core veneer separation, face bubbling, and surface peeling in Film Faced Plywood. These issues primarily stem from insufficient adhesive curing and improper handling of plywood blanks before pressing. The high temperatures accelerate adhesive drying before proper bonding occurs, weakening the structural integrity of the panels.
Common Types of Film Faced Plywood Affected:
- Green Plastic (PP) Film Faced Plywood – Known for its smooth surface and water resistance, often used in concrete formwork.
- Brown Film Faced Plywood – Features a durable phenolic film, commonly used in construction for its strength.
- Black Film Faced Plywood – Offers high wear resistance and is widely used in heavy-duty formwork applications.
Key Measures to Ensure Quality:
- Strict Pre-Pressing & Hot-Pressing Timelines: Avoid prolonged exposure of plywood blanks to high temperatures before pressing.
- Adhesive Quality Control: Use heat-resistant adhesives suitable for seasonal temperature fluctuations.
- Moisture Management: Ensure core veneers are properly dried to prevent uneven curing.
- Enhanced Inspection: Focus on edge bonding and surface integrity to detect early signs of delamination.
Given the recurring quality issues during this season, manufacturers must strengthen quality checks and adjust production protocols to prevent adhesive failure. Proactive measures will help maintain the durability and performance of Film Faced Plywood, ensuring compliance with industry standards and customer expectations.
Conclusion: The April-May period demands heightened vigilance in plywood production. By implementing stricter quality control and optimizing pressing schedules, factories can minimize defects like core delamination and surface bubbling, ensuring reliable and long-lasting Film Faced Plywood for construction applications.
