Uneven foaming in WPC door panels fundamentally results from an imbalance in gas generation, melt encapsulation, and the curing process. To systematically resolve this issue, multi-dimensional collaborative adjustments centered on the foaming agent are required.

The core lies in controlling the foaming rhythm. Priority should be given to checking whether the decomposition temperature of the foaming agent matches the plasticization process of the matrix. If there is a mismatch, zinc-based activators can be added to precisely lower the decomposition temperature, ensuring that gas is released when the melt strength is optimal.

The key is to enhance the melt's "encapsulation capability." This is the foundation for achieving uniform cell structure. It is essential to ensure the adequate addition of foaming modifiers, which significantly improve melt strength, prevent bubble coalescence or collapse, and thereby form a stable, fine-cell structure.

The foundation lies in optimizing the processing environment.

• Process Temperature: Adhere to the principle of "low-temperature plasticization, high-temperature foaming." Providing sufficient and precise heat in the die head and mold area is the signal for triggering uniform foaming.

• Wood Flour Treatment: Wood flour must be thoroughly dried; any residual moisture is a hidden danger leading to coarse cells or even "blowouts."

• Lubrication Balance: Re-examine the balance between internal and external lubrication. Excessive external lubrication can hinder the uniform release of gas, causing surface skinning and large internal bubbles.

In summary, resolving uneven foaming is not just about adjusting the foaming agent itself but rather a coordinated effort between "formulation and process." By employing activators for precise temperature control, foaming modifiers to enhance the melt, and optimizing the wood flour and lubrication systems, it is possible to produce high-quality WPC door panels with uniform cells and smooth surfaces.

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#PVC_stabilizer #PVC_foaming_agent#PVC_processing_aid#WPC_additive#PVC_lubricant#Chemicals#Chemical_auxiliary_agent#PVC#PVC_additives