Many small material factories adjust wpc material raw material proportion randomly to cut production cost, leading to finished wpc door and wpc sheet easy cracking, shrinking and mildew. Standardized raw material collocation is the core foundation to guarantee long term stable physical performance of all wood plastic composite products.
PVC resin forms the plastic matrix skeleton of whole wpc material to lock scattered wood powder particles. Too low PVC content makes wpc material brittle and easy to break during cutting processing, while excessive PVC ratio reduces product hardness and nail holding force for furniture installation. Fixed balanced resin proportion keeps flexible and rigid dual performance of finished wpc products.
Ultra fine uniform wood powder below one hundred mesh mixes evenly with molten PVC resin without granular surface bumps on finished wpc sheet. Coarse irregular wood powder creates rough panel surface and weak internal bonding force, causing pvc lamination film bubble shedding after short term use on wpc door surface.
WPC material for bathroom wpc door adds high proportion waterproof anti mold additives to resist continuous moisture erosion. Indoor dry area wpc sheet formula reduces auxiliary agent content reasonably to lower raw material cost without losing basic dimensional stability under normal indoor temperature and humidity changes.
Heat stabilizer additives prevent wpc material decomposition and discoloration under high co extrusion sheet molding temperature. Unqualified insufficient stabilizer dosage makes wpc sheet surface yellow during production, generating mass defective products and increasing raw material waste loss for material processing plants.
