How to distinguish the viscosity of liquid silicone?

Liquid silicone rubber is a kind of amorphous material with high activity adsorption data. Its chemical Molecular formula is mSiO2 · nH2O. The liquid silicone rubber product has high transparency and no odor, no obvious mold lines and hair edge defects, and its appearance is exquisite and beautiful. During the molding process, the liquid silicone rubber does not add any auxiliary materials such as sulfur agent.

The viscosity of liquid silicone is generally related to the molecular weight of siloxane. The lower the molecular weight, the lower the monomer viscosity. The higher the molecular weight, the more linear the viscosity appears. For example, it exists from 100 cps to tens of thousands of cps, which is also related to its inorganic fillers and curing agents. The chemical composition and physical structure of silicone determine that it has many characteristics that cannot be replaced by other similar materials. For example, after the high solid content of silica powder is cured, even low viscosity silicone rubber will become very hard. Various types of silicone rubber also form different microporous structures due to their different production methods. Liquid silicone rubber is used for transfer printing silicone rubber, and its viscosity is close to 50 degrees hardness. The raw materials are relatively thick, and the molecular weight of the combined materials is relatively tight, without much fluidity. For making adhesive heads, the product is relatively hard, It is necessary to adjust the viscosity of the diluted silicone gel to achieve its required fluidity through silicone oil to achieve the hardness of the transfer printing head.

The mold silicone used for food grade has hardness, and the thicker the silicone, the higher its hardness. The thinner the viscosity and the better the fluidity, the lower the hardness of the silicone! Therefore, the viscosity, hardness, and color can be adjusted according to the customer's product requirements. The raw materials have good high-temperature resistance, food grade, non-toxic, tasteless, and have passed FDA food grade certification.

The raw material of silk screen silicone is also relatively thick, which is used for one-time forming of anti slip point plastic processing. It is used for quick thickness, strong three-dimensional sense of silicone, and strong adhesion. If using a printing pattern trademark operation, the fluidity can be adjusted through a diluent, which can be used to enhance the brightness of the cover, better highlight the vividness and flexibility of the pattern, and make the effect more natural and beautiful.

The higher the viscosity, the closer the cross-linking molecular weight and the higher the hardness. The viscosity of liquid silicone has different advantages for different product raw materials. Therefore, in the operation of different products, it is necessary to choose the appropriate silicone raw material. For different product operations, it is used for different soft and hard hardness. When selecting, you can communicate with the supplier based on the actual product situation to better adjust a targeted silicone raw material suitable for the product!