Tag: silicone products

Many people who have purchased silicone products have found that the silicone products they just purchased will have some odors, so are there any quality problems with these silicone products, and how are these odors generated. How to remove the odor on silicone products?

Anyone who knows about silicone products knows that good silicone raw materials are non-toxic and tasteless, but in the production process, they will go through processes such as adding color masterbatches, fluidizing agents, and high-temperature molding by hydraulic presses. A little odor is produced, which is a normal phenomenon, not a problem with the quality of silicone products. In fact, the solution to this problem is very simple, as long as it is placed in a ventilated place for 2-3 days, the smell will disappear.

But to really remove the unpleasant odor of silicone products, the best way is to optimize the selection of silicone raw materials and the vulcanization process.

　　1. Silica gel raw materials and production and processing: In order to reduce costs, some silicone product manufacturers often increase a certain share of recycled silica gel, and at the same time also increase a certain share of polluting operating oil; however, these must use environmentally friendly, tasteless and good for silica regeneration. Polluting volatiles have to inhibit and degrade the process oil to complete. Therefore, we need to deal with the odor of silica gel products on the basis of selection from the raw materials and production and processing of silica gel.

For example: choose oil with high flash point and odorless; do not add reclaimed rubber; do not use accelerator CBS; do not use DCP, etc.

2. Vulcanization system and process: Silica gel is a gas-phase glue, and is mixed with an odorless vulcanizing agent, and the silica gel is formed after secondary vulcanization.

Silicone performance:

1. Silicone products are based on silicon-oxygen (Si-O) bond as the main chain structure, the bond energy of C-C bond is 82.6 kcal/mol, and the bond energy of Si-O bond is in the organic silicon The medium is 121 kcal/mol, so the thermal stability of silicone products is high, and the chemical bonds of the molecules are not broken or decomposed under high temperature (or radiation exposure). Silicone is not only resistant to high temperatures, but also low temperatures, and can be used in a wide temperature range. Whether it is chemical properties or physical and mechanical properties, the change with temperature is very small;
2. Electrical insulation properties. Silicone products have good electrical insulation properties, and their dielectric loss, withstand voltage, arc resistance, corona resistance, volume resistivity and surface resistivity are among the best in insulating materials, and their electrical properties are affected by temperature and frequency. impact is small. It is a stable electrical insulating material and is widely used in the electronics and electrical industries. In addition to excellent heat resistance, silicone also has excellent water repellency, which is the guarantee of high reliability of electrical equipment in wet conditions;
3. Physiologically inert, polysiloxanes are among the most inactive compounds known. They are very resistant to biological aging, have no rejection reaction with animals, and have good anticoagulant properties;
4. Low surface tension and low surface energy, the main chain of silicone is very flexible, and its intermolecular force is much weaker than that of hydrocarbons. Therefore, it has lower viscosity and weaker surface tension than hydrocarbons of the same molecular weight. Small surface energy and strong film-forming ability. This low surface tension and low surface energy are the main reasons for its many applications: hydrophobicity, defoaming, foam stabilization, anti-sticking, lubrication, glazing and other excellent properties.