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        # The Balancing Act: Reducing Costs with Calcium Carbonate Fillers

        

**Topic:** Production

        

Raw material prices are rising, and your margins are shrinking. How do you cut costs without producing 'chalky' pipes that fail the quality test?

        
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## Problem

Over-loading with low-quality fillers is the most common cause of product failure in the PVC industry. It leads to poor surface finish, low impact strength, and excessive wear on your extrusion screws.

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## Likely cause

This issue often stems from inconsistent compounding temperatures, inferior raw material purity, or unbalanced stabilizer ratios within the formulation matrix.

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## Corrective direction

The secret lies in the particle size and surface treatment of the filler. NBT recommends using coated, ultra-fine Calcium Carbonate. The coating improves the bond between the filler and the PVC matrix, allowing for higher loading levels (up to 20% more) while maintaining acceptable mechanical properties.

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          ## Frequently Asked Questions

          
### What is the ideal particle size for PVC pipes?

For most rigid applications, a mean particle size of 1-2 microns is ideal.

### Does the filler affect the color?

Yes, high-purity white fillers can actually reduce the amount of expensive Titanium Dioxide needed.

        
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By NBT Technical Desk · Updated 2026-06-07

        

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