In contemporary times, the coating industry is developing rapidly, during which the high glossy glossy coatings are loved by consumers for their bright and vivid color and other advantages, and have occupied the coating market for quite a long time. However, the reflection of high gloss glossy coatings is more serious after the film is formed, which gives people a blinding feeling. At the same time, it is harmful to human eyes. On the other hand consumers' aesthetic concepts are more and more inclined to leisure, fashion and personalization. These factors then lead to a sharp increase in the demand for low-gloss coatings with a soft appearance. Therefore, the question of how to produce coatings with matting properties has become a necessary consideration.

Ground Calcium Carbonate is a powder material obtained from calcite, marble, limestone, chalk, alabaster and other natural minerals as raw materials, processed by mechanical grinding.

The main resins used in the shoe industry are PVC (polyvinyl chloride), RB (rubber), PU (polyurethane), TPR (thermoplastic rubber) and so on, and the addition of calcium powder mainly plays a role in reducing the cost and increasing the abrasion resistance of shoes. In this article, we will briefly introduce the application of inorganic filler for several common shoe sole materials, because the shoe sole filler involves more than calcium carbonate powder materials, but also some related fillers incidentally introduced for your reference.

Oil Absorption Value, also known as Resin Adsorption Volume, is an index that indicates the amount of filler absorbed into the resin. The oil absorption value is usually expressed in terms of the mass of linseed oil required for 100g of sample (% or mL/100g). That is, per 100g of sample, the minimum amount of oil required to achieve complete wetting.

As mentioned in the last issue, talc, diatomaceous earth, kaolin, fumed silica, etc. are functional fines specially used as matting agent, which belongs to inorganic filled matting agent. When the film is drying, their tiny particles will form a micro-rough surface on the surface of the film, reducing the reflection of light to obtain the appearance of matting. However, the matting effect of such matting agents is subject to the constraints of many factors.

Previously mentioned in the soft, now different industries for the increasing demand for transparent inorganic filler, transparent inorganic filler filler modified plastics, coatings and other industries, in order to meet the physical and chemical properties of the decline in the case of a small amount, but also has a good light transmittance.

Test results show that: viscosity comparison, nano-calcium > heavy calcium carbonate > low oil-absorbing activated calcium. 1, generally the finer the powder, the higher the oil-absorbing value, the higher the viscosity, by the nano-calcium particle size between 60-100nm, has an excellent thickening effect, can effectively improve the stability of the fluid; 2, at the same time, as can be seen above, low oil-absorbing active calcium viscosity rate slower than the heavy calcium carbonate, that is, in the same proportion of its viscosity is smaller, and the other by the right figure can be seen in the high proportion of low oil-absorbing active calcium in the addition of a certain amount of shear viscosity effect, similar to the rheological properties of talcum powder, with the production and construction of a friendly features; 3、At the same time, generally with the different additive ratio of the powder filler, the system viscosity will also appear different changes, the follow-up Division I will start a new share for this.

In recent years, surface modification is one of the most active and fastest developing technologies in the field of non-metallic mineral powder processing, and it is also an important means to improve its application performance, expand the market and consumption. Therefore, it has received much attention from the non-metallic mineral powder industry and downstream application industries.