The optimal D90 particle size for pea protein powder varies by application, balancing sensory, functional, and processing requirements. Below is a structured guide to help select the right D90 for your needs.
Core D90 Ranges by Application
| Application | Optimal D90 Size | Key Benefits | Trade-offs |
|---|---|---|---|
| Premium Beverages/Shakes | <20 μm (often 10-15 μm) | Creamy mouthfeel (tongue cannot distinguish individual particles), fast dispersion, minimal sediment | Higher dust formation, increased viscosity, higher processing cost |
| Standard Protein Powders | 20-45 μm | Good balance of dispersibility, flowability, and mouthfeel | May require mixing aids for complete suspension |
| Dry Fractionation Processing | 40-60 μm | Ideal for separating protein from starch fractions | May feel slightly gritty in clear beverages |
| Bars/Bakery Applications | 35-65 μm | Better hydration, binding properties, and texture retention | Slower dispersion in cold liquids |
| Textured Protein/Meat Alternatives | 50-100 μm | Enhanced juiciness, meat-like texture | Not suitable for clear beverage applications |
Key Considerations for D90 Selection
1. Sensory Experience
- Particles <20 μm: Eliminate grittiness and chalkiness, creating a smooth, dairy-like mouthfeel
- Particles >50 μm: May be perceived as “grainy” or “chalky” in thin beverages
2. Functional Performance
- Dispersibility: Finer particles (D90 <30 μm) disperse faster in liquids
- Stability: Smaller particles reduce sedimentation in RTD beverages
- Flowability: Coarser particles (D90 >40 μm) have better flow characteristics, reducing bridging in packaging
- Hydration: Medium-to-coarse particles (D90 35-60 μm) hydrate more evenly in bars and bakery goods
3. Processing Implications
- Dry fractionation: D90 40-60 μm optimizes separation efficiency between protein and starch
- Micronization: Air classification can achieve D90 <20 μm for premium products
- Agglomeration: May be used to increase particle size for better flow and reduced dust
General Recommendations
- Default for most applications: 20-40 μm D90 – offers the best balance of sensory appeal, functionality, and processing efficiency
- Premium beverage formulations: 10-15 μm D90 – provides the smoothest mouthfeel and fastest dispersion
- Cost-sensitive bulk applications: 40-60 μm D90 – balances performance with production efficiency
Note: Particle size distribution (PSD) should be considered alongside D90, as a narrow distribution (low span) improves consistency in both sensory and functional properties .
