DAI A WHITE MASTERBATCH

One White Color – Three Different Processing Challenges

Product Group	White Masterbatch
Applications	Extrusion Coating | Multilayer Blown Film | Injection Molding
Status	Application development – Trial – Adjustment based on actual requirements

 

1. Background & Customer Challenge

In real production, a White Masterbatch may have an attractive pellet color but still fail to deliver the expected performance on the customer’s production line. High whiteness is important, but it is not enough to solve the full set of requirements: opacity, dispersion, processing stability and final product appearance.

Instead of asking only “how much TiO2 does this white masterbatch contain?”, Dai A approaches the challenge from the end product: whether the coating layer is uniform, whether each white layer in a multilayer film reaches the required opacity, and whether injection-molded parts maintain consistent white color across the entire surface.

• Extrusion coating: prioritizes uniformity on a thin material layer, stable processing at high line speed and consistent surface appearance.
• Multilayer blown film: prioritizes layer-specific opacity, good dispersion, reduced gel/white spots and stable bubble performance.
• Injection molding: prioritizes whiteness, color uniformity, flowability and the reduction of streaks, flow marks or pigment spots.

2. Dai A Solution

Dai A does not develop one formula for every application. Each White Masterbatch grade is selected and adjusted based on the base resin, product structure, machine conditions, dosage and finished product requirements. As a result, the same White Masterbatch category is optimized differently for extrusion coating, multilayer blown film and injection molding.

Optimization Direction by Application

Application	Key Technical Requirement	Optimization Direction
Extrusion Coating	Thin white coating layer, stable at high speed	Dispersion, rheology and surface appearance
Multilayer Blown Film	Layer-specific opacity and stable bubble	Dispersion, opacity and processing stability
Injection Molding	Whiteness and surface color uniformity	Rheology, color uniformity and reduced streaks/pigment spots

 

3. Testing & Refinement: The First Trial Does Not Always Succeed

New material development is rarely a straight path. In practice, a sample may have attractive pellets, good whiteness and positive laboratory results, but still generate different issues when tested on the customer’s actual production line. Trials that do not pass are not a failure; they provide essential data for Dai A’s technical team to adjust and optimize the solution.

A failed trial is not the end – it is data for finding the right formulation.

Trial 1 – Extrusion Coating: Good Whiteness, Uneven Coating Layer

At the initial speed, the sample showed good whiteness. However, when the line speed increased and the coating layer was evaluated at a thinner thickness, the surface began to show uneven areas. This indicates that a “visually white” sample is not necessarily suitable for extrusion coating if dispersion and rheological behavior are not properly balanced.

Trial 2 – Multilayer Blown Film: Increasing Dosage Did Not Fully Solve the Issue

The film ran stably under initial conditions. However, when the white layer thickness was reduced and production speed increased, pigment spots and opacity variation started to appear. Simply increasing White Masterbatch dosage to compensate for opacity would also increase inorganic loading in the film, creating potential risks to processability and mechanical properties. This trial was therefore not considered successful.

Trial 3 – Injection Molding: Whiteness Achieved, Color Uniformity Not Yet Optimized

For products with high surface appearance requirements, the sample achieved overall whiteness, but color shade uniformity across long-flow areas was not fully optimized. The issue was linked to the combination of dispersion, rheology and compatibility with the base resin, and could not be solved only by adding more pigment.

4. Practical Applications

4.1. White Masterbatch for Extrusion Coating

Suitable for structures requiring a white polymer layer coated onto plastic film, paper, woven bags or other substrates. In this application, the target is not only “white” but also a uniform, stable coating layer that supports high-speed processing.

• Typical applications: PE/PP coated flexible packaging, polymer-coated paper, coated woven bags and white coating structures.
• Optimization focus: dispersion, surface appearance, thermal stability and processability.

4.2. White Masterbatch for Multilayer Blown Film

In ABA, ABC or multilayer co-extrusion structures, White Masterbatch must be evaluated by the layer that contains the white color rather than by the total film structure. The solution should therefore be developed based on layer thickness, the base resin of each layer and the required opacity of the final product.

• Typical applications: food packaging, pet food packaging, coffee bags, packaging films and multilayer industrial packaging.
• Optimization focus: layer-specific opacity, bubble stability, dispersion and retention of film mechanical properties.

4.3. White Masterbatch for Injection Molding

In injection molding, products are often evaluated directly by surface appearance. In addition to whiteness, White Masterbatch must provide color uniformity along polymer flow paths, reduce streaks, limit pigment spots and maintain stability across shots and production batches.

• Typical applications: rigid plastic packaging, caps, household products, technical parts and white products requiring stable surface appearance.
• Optimization focus: color uniformity, dispersion, rheology and processing stability.

5. Results & Benefits

After trials and application-specific adjustments, the White Masterbatch solution is designed to deliver the following benefits:

• Whiteness and opacity suited to the final product, not only the pellet color.
• Improved pigment dispersion, reducing the risk of agglomerates, pigment spots and color streaks.
• More stable processability under actual machine and polymer conditions.
• Dosage can be optimized based on finished product requirements instead of only increasing dosage to achieve whiteness.
• Cost-in-use optimization: White Masterbatch cost per unit of acceptable finished product.

Cost-in-use: A Different Way to Evaluate Cost

A lower price per kilogram of masterbatch does not always mean the lowest production cost. The key is how much masterbatch is required to produce one ton of qualified finished product. If a White Masterbatch provides better opacity and dispersion, dosage can be optimized, resulting in better economic efficiency on the final product.

6. Customer Value

The value of the solution is not limited to a new pellet grade. It lies in the ability to develop materials according to the real production challenge. Dai A aims to act as a technical partner, supporting customers from application analysis, trial and adjustment to operational optimization after the product is applied.

• Application and end-product data driven approach.
• Support in analyzing trial issues and identifying the variables that need adjustment.
• Optimization of quality, processability and usage efficiency at the same time.
• Continuous adjustment when the base resin, machine conditions or finished product requirements change.

7. Conclusion

From extrusion coating and multilayer blown film to injection molding, each technology creates different requirements for White Masterbatch. Dai A develops solutions based on actual applications, polymer base, product structure and equipment conditions, aiming to balance whiteness, opacity, dispersion, processability and cost-in-use.

If your business needs to improve whiteness, opacity or dispersion, or to develop a White Masterbatch specifically suited for extrusion coating, multilayer blown film or injection molding, Dai A’s technical team can work with you to evaluate the application and build the right solution.