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Winter toothpaste water separation? Thickening silica optimizes rheological properties.
Created on 07.23
Many manufacturers run into thinning, syneresis, or phase separation in winter — short shelf life and customer returns are a real headache. Industry data shows demand for thickening-grade silica growing around 8% per year, which basically means everyone's hunting for material that keeps paste stable.
Zhongqi's thickening series has been around for years. We offer several grades with specific surface areas from 170 to 220 m²/g, tailored to different consistency needs. The workshop is GMP-standard and fully enclosed, with tight microbial control — so it's safe and reliable for oral care products.
Thickening silica quickly forms a 3D network structure so the paste resists syneresis. ZLDIO-T105 is our super-thickening grade — it works at very low dosage and stays consistent even at -5°C. It also adds thixotropy, so the paste feels smooth when brushing, not stiff or hard to squeeze. It also works well as a suspending agent for toothpastes with particles like scrub beads, preventing sedimentation.
Conventional thickening silica often struggles to balance consistency and squeeze feel, and can leave the paste with a heavy stringy texture. We've tuned the pore structure to balance both consistency and squeeze feel. More than 20 domestic Chinese toothpaste brands use it consistently. For detailed rheology test data, see the dedicated article in our solutions section.
If you're struggling with paste stability and customer complaints, try switching to a dedicated thickening silica first — it's much simpler than endlessly reformulating.
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