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Silica Used in Toothpaste
Jun 12, 2018

                                                           Silicon Dioxide for Toothpaste/Dental Silica

Silica is chemically inert, with fluoride in toothpaste and others.It has good compatibility, good compatibility and stable paste quality. According todifferent specifications and specifications can be obtained through different production processes.Silicon dioxide, such as friction type, thickening type and mixed type.There are several main aspects in toothpaste. 

Compatibility with fluorine

In the formulation of toothpaste, the main raw materials affecting fluoride stability.

It is a friction agent, and the choice of friction agent is the key to fluoride toothpaste.

Silica has good chemical stability and compatibility with fluoride. We have done a lot of experiments aiming at fluoride compounds with different abrasives.In the interference test, the detection rate of fluorine content was 100%,The production process is divided according to the moisture content of the cake, namely the moisture content of the wet cake.The moisture content of wet cake is more than 70% higher than that of high structure product.Less than 70% is a low structure product or friction type.

 Friction silica

This silica is a low structure product with moisture content of wet cake.70% below, generally around 60%, oil absorption value 110~ 130ml/100g, the specific surface area is generally 170~ 220m 2 / G. Very good

dispersed suspension, its particles are compact and frictional, and it is used for friction.

The toothpaste made by the agent has fine paste, smooth taste and good paste stability.

At the same time, it does not damage the teeth, and improves the tissue structure and appearance of the paste.

Satisfactory results have been achieved.

Thickened silica

This silica is a highly structured product with moisture content of wet cake.

Above 70%, the oil absorption value is as high as 300ml/ 100g or above.

The area is generally 300m 2 / 100g. Having good compatibility and having

Very fine particle size and excellent water combining ability. Its structural characteristics are silanol base.

Three dimensional skeleton structure is formed because of cross linking. Therefore, silica water

The dispersion has a certain degree of consistency and good thixotropy, which is compatible with inorganic.

The gel used in common toothpaste can reduce the dosage of some thickeners.

At the same time, improve the paste strip and dispersion, improve paste stability.

Play a positive role.

Transparent toothpaste

Any paste of toothpaste has its own refractive index.The refractive index of the friction agent must match, otherwise the toothpaste will not become transparent, that is to say, the liquid phase of paste is consistent with the refractive index of solid phase.It is the prerequisite for the transparency of toothpaste. The main component of the liquid phase is moistening wet agent, mainly sorbitol, glycerol, its refractive index is 1. 457,1. 470. The silicon dioxide is controlled by adjusting the production process and controlling the refractive index between1.450 and 1. 460. The ratio of the wetting agent to the water can be adjusted.

The liquid phase is consistent with the refractive index of the solid phase, so as to achieve a transparent effect.

In addition to refractive index, its transmittance is also good, generally,the requirement is over 70%. As long as the above two conditions are available, the solid is fine.Particles dispersed in hydrophilic colloids do not produce diffuse reflection.An ointment with better transparency. Therefore, silicon dioxide is the only preparation.

The abrasive of the toothpaste