🧑💼 Customer Background
The client is a major Tier-1 supplier of automotive plastic components, producing parts like dashboards, door panels, instrument housings, fenders, grilles, and bumpers. Materials used include PP, TPO, and ABS+PC, with over 5 million parts delivered annually to domestic and joint-venture OEMs.
As OEMs demand lighter weight, better aesthetics, and stricter quality control, the customer faced growing challenges in material stability and process consistency.
❗ Challenges Faced
In their original PP-based formulations using standard fillers, the customer experienced:
Severe warping, especially in large panels, affecting fit and assembly precision
Surface defects like weld lines, flow marks, and visible roughness
Poor melt flow, increasing injection time and inducing internal stress
Inconsistent mechanical properties across batches, leading to high rejection rates
These problems reduced first-pass yield and caused frequent returns, particularly in export projects with tight specifications.
We recommended BHS-1250A, a premium fine talc powder tailored for automotive plastic parts, and helped optimize the compound formulation accordingly. Key advantages include:
D50 ~6μm particle size, ensuring better melt flow and stress distribution
High-crystallinity platy structure, significantly reducing warpage and improving rigidity
Surface-treated for compatibility with PP, avoiding delamination and phase separation
Low iron and high brightness, enhancing surface appearance and paintability
Our technical team also advised on adjustments to molding conditions (e.g., holding time, barrel temp, mold temp) to maximize performance.
After one month of mass production, the following improvements were reported:
✅ Warping rate dropped by over 55%, with dimensional variance controlled within ±0.2 mm
✅ Surface complaint rate fell by over 70%, parts met Class-A appearance standards
✅ Injection cycle reduced by ~12%, increasing line productivity
✅ Material strength improved by 18%, eliminating the need for glass fiber reinforcement
✅ Defect rate decreased from 6.2% to 2.1%, with monthly returns cut in half
“Dimensional drift and fitting issues used to be our biggest concerns, especially for export models. This talc solution really stabilized the molding process. Even pre-paint surface prep became easier. Quality is up, rework is down, and our customers are happier too.”