Stop Costly Discoloration in Molding with Bigmate PH’s Expert Solution
In the plastic injection molding industry, consistent color across parts isn’t just a cosmetic requirement — it reflects the reliability of the entire production process. One common quality concern is discoloration, which appears as streaks, blotches, or inconsistent shades on molded parts.
At Bigmate Philippines, we understand how even minor color variations can impact product presentation and customer perception. That’s why we take a technical and process-driven approach to eliminate this issue.
In the plastic injection molding industry, consistent color across parts isn’t just a cosmetic requirement — it reflects the reliability of the entire production process. One common quality concern is color unevenness, which appears as streaks, blotches, or inconsistent shades on molded parts.
What Causes Color Discoloration?
Discoloration in injection molding is typically due to:
- Poor Pigment Dispersion – Inadequate blending of masterbatch or colorants with resin can cause uneven color distribution.
- Melt Temperature Instability – Overheating or inconsistent temperature across barrel zones can degrade pigment or resin.
- Inconsistent Feeding – Fluctuations in masterbatch concentration or improper material drying affect uniformity.
- Screw and Barrel Design Issues – A worn screw or insufficient mixing section results in poor melt homogenization.
- Unstable Injection Parameters – Irregular backpressure or injection speed disrupts the melt’s consistency.
How Bigmate Philippines Ensures Color Consistency
To maintain consistent part quality, Bigmate PH implements the following:
- Precision Feeding Systems – We use reliable dosing equipment to ensure accurate masterbatch-to-resin ratios.
- Optimized Screw Design – Our machines are equipped with mixing screws for improved pigment dispersion.
- Stable Processing Parameters – We monitor and maintain consistent backpressure, temperature, and injection speed.
- Strict Material Handling – All resins and colorants are dried and stored under controlled conditions to prevent moisture-related defects.
Preventive Maintenance – Regular equipment checks prevent issues that can affect melt uniformity and color stability.
Additional Insight: Base Resin Compatibility
In one of our recent projects, our engineering team found that switching to a different type of base resin helped eliminate a similar discoloration issue. This shows that resin and masterbatch compatibility can also play a key role in solving color variation problems.
At Bigmate Philippines, we combine technical knowledge and process control to deliver clean, consistent, and high-quality molded parts—every time.
- (+63)998 951 8447
- Bigmate Philippines Inc. FPIP, Sta. Anastacia, Sto. Tomas, Batangas
- Monday to Friday: 8:00 AM – 5:00 PM
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