Why do cosmetics prefer hemispherical silica?
Oct 28, 2024
Leave a message
Why do cosmetics prefer hemispherical silica?
Why is spherical silica good? Because of its high filling amount, good fluidity, low thermal expansion coefficient and low stress, it is widely used in the field of copper clad plate and epoxy plastic sealing material filler in large-scale integrated circuit packaging. But in some cases, spherical silica will be affected by these characteristics and become less useful, such as cosmetics.
Although spherical silica can play an important role in many fields, in the field of cosmetics, its role is not as prominent as hemispherical silica.
The big difference between spherical silicon dioxide and hemispherical silicon dioxide is the shape, so the effect is also different, and the following figure can be intuitively seen how different the two look.
Why do cosmetics prefer hemispherical silica?
The reason why hemispherical silica is better than spherical silica is that it not only has the inherent smoothness and moisturizing sense of silica powder, but also brings smooth and tender silky touch to the skin, strengthens the soft focus effect, visually improves skin wrinkles, improves color saturation, and its hemispherical and sunken shape can relatively better grasp the skin. It greatly improves the lasting effect of makeup products, especially powder products. Hemispherical silica is more skin friendly.
For example, when spherical silica and hemispherical silica are respectively used in lip balm, because the spherical powder is easy to roll on the skin, it will cause mica and pigment to roll back and forth with it, and the color density will become weak; The hemispherical powder stays and inlay on the surface of the skin, so the mica and pigment do not slide, and this concentration will make the color more concentrated. Therefore, under the same conditions applied to the inside of the human forearm, the lip balm containing hemispherical silica has significantly higher color saturation and better durability.
Why do cosmetics prefer hemispherical silica?
In the area of sunscreen, hemispherical silica is also promising. First of all, silica itself is an important ingredient in sunscreens, especially physical sunscreens. Physical sunscreen is relatively safe, the main reason is that the powder it contains (titanium dioxide, zinc oxide, etc.) is inert, will not be photodegraded, and there is no skin absorption problem, but the disadvantages are also obvious, sunscreen particles are easy to agglomerate and deposit. The role of silicon dioxide is to form three-dimensional space protection on the surface of titanium dioxide and zinc oxide, weaken the attraction between particles, reduce the possibility of agglomeration, make the system more uniform and more stable, and provide additional thixotropic performance, which can help the product spread evenly on the skin surface, improve the skin feel and feel when applying.
However, if the use of hemispherical silica, the sunscreen can be further enhanced. This is because the hemispherical silica has the characteristics of disorderly reflection of ultraviolet rays, so that the ultraviolet rays accepted by the ultraviolet absorber are more, and at the same time, the ultraviolet rays reflected by the ultraviolet rays scattered are more, which indirectly improves the sunscreen effect and can achieve the effect of soft focus.
All in all, cosmetic sales have been increasing in recent years, and the demand for silica is also increasing year by year. In such a competitive situation, these advantages of hemispherical silica must play an important role, so I believe it will have a good application prospect in the field of cosmetics.
If you are interested, please contact us below.
