Nanoclay and micronized sodium sulfate are both additives commonly used in polymer applications, but they serve different purposes and offer distinct properties. Here’s a comparison between the two:

PURPOSE
Nanoclay Improve mechanical properties, Improve barrier properties Flame retardancy.Micronized sodium sulfate Improve mechanical strength Improve dimensional stability. Cost-effectiveness Reducing the environmental footprint.  
PARTICLE SIZE AND STRUCTURE
Nanoclay particles are Nano SizedMicronized sodium sulfate particles are Micron Sized  
OPTICAL CLARITY
Nanoclay Does not enhance optical clarity. May reduce transparency at higher loadings.  Micronized Sodium Sulfate Can maintain or even enhance optical clarity
COST AND AVAILABILITY 
Nanoclay More expensive than micronized sodium sulfate  Micronized sodium sulfate Is more cost-effective
ENVIRONMENT
Nanoclay is not GRAS (Generally recognised as safe) for use in food grade plasticsMicronized Sodium Sulfate is designated as GRAS (Generally recognized as safe) by US FDA