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05
2026
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01
Core summary of the application of silica in toothpaste
Continuous technological innovation, developing new products with high refractive index and low viscosity to meet the needs of high-end toothpaste such as transparent and whitening toothpaste
1. Core functions
1. Efficient cleaning: As a physical friction agent (Mohs hardness 4-5), it has uniform particles and moderate hardness. It can remove dental plaque, food residues and exogenous pigments without damaging tooth enamel.
2. Improve stability: It has stable chemical properties and does not react with toothpaste ingredients such as fluoride and Chinese herbal medicine. It can enhance the stability of fluoride in fluoride toothpaste and help prevent dental caries.
3. Optimize texture and appearance: The refractive index (1.43-1.46) is close to that of liquid toothpaste, allowing transparent toothpaste to maintain high transparency (transmittance >90%) and make the paste more delicate.
2. Main types and characteristics
| Type | Core Features | Applicable scenarios |
| Friction type silica | Tight particles, strong friction, water absorption 8-25mL/20g, light transmittance >90%, copper consumption value >10.0mg, RDA value 120-150 | Powerful cleaning products such as whitening toothpaste and tobacco stain removal toothpaste |
| Thickening silica | Loose structure, strong water absorption and high oil absorption value | Improve toothpaste viscosity and stability, making the paste smoother |
| High friction transparent silica | Both high friction performance and high transparency | Transparent whitening toothpaste, taking into account appearance and cleaning power |
3. Advantages compared to other friction agents
4. Safe and non-toxic, as a food additive and pharmaceutical excipient, no adverse reactions;
5. Good compatibility with fluoride, better than calcium carbonate and calcium phosphate friction agents;
6. Lower density, which can reduce toothpaste production costs;
7. The function is adjustable. By adjusting parameters such as particle size and oil absorption value, it can adapt to different cleaning needs (from powerful whitening to gentle tooth protection).
4. Industry status and development trends
8. Market share continues to increase, gradually replacing natural calcium carbonate as the mainstream friction agent;
9. Continuous technological innovation, developing new products with high refractive index and low viscosity to meet the needs of high-end toothpaste such as transparent and whitening toothpaste;
10. Industry standards are complete, and China has standards such as QB/T 2346-2015 to regulate core parameters;
11. In line with the trend of environmental protection and health, it is used as a phosphorus-free friction agent to avoid phosphorus-rich water pollution.
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