Learn the key differences between white and yellow foaming agents. A complete guide to AC chemical foaming agents for EVA, PVC, and rubber applications.
Dec 22nd,202598 Views
Chemical Foaming Agents Overview
Chemical foaming agents are essential additives in the production of lightweight plastic and rubber materials. Among various options, white foaming agents and yellow foaming agents based on AC foaming agent (Azodicarbonamide) are the most widely used in EVA foaming, PVC foaming, and rubber foaming applications.
Although both belong to the category of chemical blowing agents, their formulation design, appearance, and application focus are different. This article provides a detailed comparison to help manufacturers choose the right foaming agent solution for their production process.
White Foaming Agent
White Foaming Agent Product Image
White foaming agent is a modified AC chemical foaming agent designed to deliver high whiteness, stable foaming performance, and fine cell structure. Through optimized formulation and additives, white foaming agents minimize yellowing during processing.
Key Features:
High whiteness and color stability
Uniform cell structure
Stable decomposition temperature
Suitable for light-colored and white foam products
Typical Applications:
White and light-colored EVA shoe soles
High-quality PVC foam sheets and profiles
Decorative foam materials
Consumer products with strict appearance requirements
Yellow Foaming Agent
Yellow Foaming Agent Product Image
Yellow foaming agent is a conventional AC foaming agent widely used in industrial foaming processes. Due to its standard formulation, it may show a yellowish tone but offers high gas yield and cost efficiency.
Key Features:
High gas output
Reliable foaming performance
Wide processing temperature window
Cost-effective chemical foaming agent
Typical Applications:
Black or dark-colored EVA foam products
Industrial rubber foaming materials
Technical PVC foaming applications
Foam products with low color sensitivity
White vs Yellow Foaming Agent: Performance Comparison
Item
White Foaming Agent
Yellow Foaming Agent
Foaming Agent Type
Modified AC Foaming Agent
Standard AC Foaming Agent
Color Appearance
White
Yellow
Whiteness Requirement
High
Low
Gas Yield
Stable and Controlled
High
Cell Structure
Fine and Uniform
Medium to Coarse
Cost Level
Medium to High
Economical
EVA/PVC/Rubber Compatibility
Excellent
Excellent
Both white and yellow foaming agents can be customized to meet specific EVA foaming, PVC foaming, and rubber foaming requirements.
Particle Size of Chemical Foaming Agents and Its Impact
Particle size is a critical parameter for all chemical foaming agents, including white and yellow AC foaming agents.
Impact of Particle Size:
Fine particle size foaming agents help produce fine-cell foam structures, smoother surfaces, and consistent density.
Larger particle size foaming agents are suitable for applications requiring higher expansion ratios and lower material density.
By adjusting particle size distribution, manufacturers can optimize foam performance in EVA foam, PVC foam, and rubber foam products.
Selection Considerations:
For products requiring smooth surfaces and fine cell structure, choose finer particle sizes
For applications needing higher expansion, larger particle sizes are more suitable
The optimal particle size depends on the specific polymer and processing conditions
Particle Size Comparison
Fine
< 10μm
Medium
10-20μm
Coarse
> 20μm
Fine particles create uniform cell structures, while coarse particles enable higher expansion ratios.
How to Choose the Right AC Foaming Agent?
When selecting a chemical blowing agent, manufacturers should evaluate:
Final product color and appearance
Processing temperature and molding method
Desired foam density and expansion ratio
Cost control and production efficiency
Particle size requirements for specific applications
For products where appearance and whiteness are critical, a white AC foaming agent is recommended. For functional or cost-driven applications, a yellow AC foaming agent offers an efficient solution.
Customized Chemical Foaming Agent Solutions
We specialize in the development and production of chemical foaming agents, including white foaming agents and yellow foaming agents, tailored for EVA, PVC, and rubber applications. Our technical team can customize:
to match your processing conditions and end-product requirements.
Understanding the differences between white foaming agents and yellow foaming agents is essential for selecting the right AC foaming agent. The correct choice of chemical foaming agent can significantly improve foam quality, appearance, and production efficiency.
