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.

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.

The rubber industry is currently called more complex, the original rubber only refers to natural rubber or synthetic rubber, but there are also some elastomers called rubber. Rubber in modern industry because of its large pollution, many conventional rubber products have been gradually replaced, but many such as tires, conveyor belt and other rubber products, still have not found a suitable alternative products, rubber materials are widely used in automotive products, footwear, conveyor and other industries.

Adhesive is generally made of bonding material (matrix resin), curing agent, toughening agent, diluent and filler, etc. It is widely used in packaging, electronic and electrical appliances, building materials, automobiles and transportation, machinery manufacturing, new energy, medical health, aerospace and other fields.

With the continuous expansion of the application field of nano-calcium carbonate, these shortcomings are more obvious. In order to give full play to the advantages of nano-calcium carbonate and improve the performance of nano-calcium carbonate, different surface modification methods and modifiers must be used for surface modification treatment.

Polypropylene PP is one of the more widely used varieties of general-purpose plastics, with the advantages of low density, good rigidity, impact resistance, chemical corrosion resistance, easy processing and good insulation, has been widely used in the chemical industry, chemical fibers, construction, light industry, home appliances, automobiles and packaging and other industrial fields, is a very promising thermoplastic. Although polypropylene has good comprehensive performance, but the molding shrinkage rate is generally 1.5%-2.5%, compared with the molding shrinkage rate of 0.4%-0.6% of ABS is much larger, in the processing of precision parts are subject to great limitations.