1. Definition and Functions
Toothpaste thickeners are key components that adjust the viscosity of toothpaste, ensuring the product’s form and user experience. They maintain a uniform paste, enable easy extrusion without dripping, improve spreadability in the mouth, and help evenly distribute active ingredients.
2. Common Types
- Natural Polymer Thickeners: e.g., Xanthan Gum (strong thickening ability, stable); Guar Gum (cost-effective, requires stabilizers); Carrageenan (gives elastic paste, sensitive to temperature and acid).
- Synthetic Polymer Thickeners: e.g., Sodium Carboxymethyl Cellulose (CMC-Na, affordable, commonly used in mid-to-low-end products); Hydroxyethyl Cellulose (HEC, stable, suitable for high-end functional toothpaste); Carbomer (highly effective, ideal for transparent/gel toothpaste).
- Inorganic Thickeners: e.g., Silica (doubles as an abrasive, suitable for low-abrasion toothpaste); Bentonite (economical, enhances stability).
3. Selection Principles
They must meet safety requirements (non-irritating, compliant with food/cosmetic grades), stability (adaptable to toothpaste pH and storage temperature), compatibility (no conflict with other ingredients), good user experience (easy to extrude, pleasant texture), and cost suitability (matching product positioning).
4. Development Trends
Developing towards “high efficiency, safety, and multi-functionality”. Natural thickeners are favored, composite systems have become mainstream, and thickeners with additional special functions are gradually being developed.