Among the many application fields of mica powder, the diameter-thickness ratio is a very important parameter, which refers to the numerical ratio of the diameter and thickness of the mica flake particles. The larger the diameter-thickness ratio, the better the general elasticity and toughness. the better. In many applications of mica powder, the aspect ratio is one of the important indicators. Synthetic mica powder

For example, in coatings and pearlescent pigments, the diameter-to-thickness ratio of mica powder will affect its ability to reflect light, thereby affecting the brightness of the product; in addition, the performance of composite materials using high-diameter-thickness ratio mica powder can also be significantly improved. as follows:

1. Improve physical and mechanical properties First of all, flaky and fibrous fillers can disperse the stress of the material, and the mechanism is similar to that of steel bars in concrete, so adding rubber, plastic and resin with large diameter-to-thickness ratio mica powder, its impact resistance. , mechanical strength, morphological stability, etc. have been significantly improved. Furthermore, mica is one of the components of granite, and its hardness and mechanical strength are very large. Therefore, adding mica powder as a filler in the coating can significantly improve its anti-wear performance. Mica powder can also change the friction characteristics of rubber, and different usages have different effects, such as increasing the coefficient of friction, or improving lubricating properties (such as wipers). After adding a large diameter-to-thickness ratio filler, the physical properties such as the elastic modulus of the material (such as rubber) are greatly improved, which is mainly due to the coupling treatment of mica powder, which can greatly improve the overall chemical sense of the material. The properties of the material can be greatly improved.

2. Improve air tightness Rubber seals are a kind of general basic components in sealing devices, and play a very important role in the contradiction between leakage and sealing. Therefore, air tightness is the primary performance for many rubber products, such as Inner tubes, bladders, many life-saving supplies, and more. In order to improve the air tightness of rubber in motorcycle inner tubes, in addition to processing technology and coating technology, it mainly depends on the properties of the rubber itself and its filler. The better the density of the rubber, the better the penetration resistance of the product. Among them, mica powder has excellent flake-like crystal shape, which can form layer-by-layer barrier in the material. This barrier effect is also called "shielding effect" and "labyrinth effect". Under the action of calendering, stretching, etc., the sheet fillers are arranged in layers in the rubber, and their orientation is parallel to the rubber surface and perpendicular to the gas penetration direction. Therefore, if mica powder is added to the rubber, its air tightness can be improved. increase in magnitude.

3. Shock-absorbing and sound-isolating effect Many sound-absorbing and shock-absorbing materials use rubber to change the physical properties of the material such as viscoelasticity to form an ideal effect. Large diameter-to-thickness ratio mica powder can change a series of physical modulus of the material. Furthermore, the reflection of energy (such as shock waves, sound waves) between the wafers also absorbs and weakens these energy. Accordingly, mica powder is often added to the "vibration damping sheet" used in vehicles and home appliances. In the same way, mica powder is also used in other vibration and sound insulation materials.