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A Multifunctional Core Ingredient in Toothpaste
Its addition imparts a smooth, fine texture to the toothpaste, reducing the feeling of grit during brushing. It also has excellent compatibility with surfactants, enhancing the consistency of the foam.
Silica, with its controllable abrasive properties, excellent compatibility, and safety, has become a key component in modern toothpaste formulations. It plays an irreplaceable role in cleaning teeth, improving taste, and stabilizing active ingredients, adapting to the functional requirements of various toothpastes.
Its core advantage stems from precise structural control. Toothpaste-grade silica, produced through precipitation or vapor phase methods, can be customized for abrasive properties by adjusting particle size (1-20μm), porosity, and hardness. This ensures effective cleaning of plaque and food debris while minimizing damage to tooth enamel. Its hardness can be precisely controlled to Mohs 2-3, significantly lower than enamel's Mohs 5-6.
As an abrasive, it is a core functional ingredient in toothpaste. In whitening toothpaste, micron-sized porous silica removes exogenous pigments (such as smoke and tea stains) through physical friction. Its pores also absorb pigment molecules, resulting in a 30% improvement in whitening effectiveness compared to traditional calcium carbonate. In toothpaste for sensitive skin, ultrafine silica particles reduce the coefficient of friction and minimize irritation to sensitive dentin.
In the formulation, silica serves both thickening and suspending functions. Its surface hydroxyl groups form hydrogen bonding networks with the humectants and gelling agents in the toothpaste, improving the paste's stability and extrudability, preventing separation and water release. It also evenly suspends active ingredients like fluoride and probiotics, ensuring consistent content with every use.
Furthermore, silica enhances the sensory experience of toothpaste. Its addition imparts a smooth, fine texture to the toothpaste, reducing the feeling of grit during brushing. It also has excellent compatibility with surfactants, enhancing the consistency of the foam.
As oral care needs evolve, functional silica (such as fluoride-modified and antibacterial silica) is increasingly being used, and holds great promise for future applications in toothpaste products that offer precise tooth care and enhanced efficacy.
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