Silica gel is made of silicon dioxide (SiO₂) as its core component through chemical synthesis or natural mineral processing; glue is based on raw rubber or mixed rubber and needs to be dissolved in an organic solvent to form a colloidal solution. The following is a specific analysis:
Source and characteristics of silica gel
Silica gel is a highly active adsorption material, and its core component is silicon dioxide (SiO₂). This material can be obtained through two main ways:
Natural mineral processing: Silicon dioxide is a naturally occurring mineral with high hygroscopicity. Natural silica gel is often used in industrial adsorption and desiccant fields, such as adsorbing moisture from the air or preventing items from getting damp.
Chemical synthesis: Synthetic silica gel is widely used in medicine, food, cosmetics and other fields. It is made by reacting sodium silicate with sulfuric acid, and then undergoing a series of post-treatment processes such as aging and acid soaking. Synthetic silica gel has strong chemical stability and safety, and can meet the high requirements of material performance in different industries.
The chemical composition and physical structure of silica gel determine that it has many characteristics that are difficult to replace by other similar materials, such as high adsorption performance, good thermal stability, stable chemical properties and high mechanical strength.
Material sources and characteristics of plastisol
Plastisol mainly refers to the colloidal solution formed by dissolving raw rubber or mixed rubber in an appropriate solvent. Its material sources and characteristics are as follows:
Basic material: The basic material of plastisol is raw rubber or mixed rubber, which can be derived from natural rubber or synthetic rubber. Natural rubber has excellent elasticity and wear resistance, while synthetic rubber can adjust its chemical structure and properties as needed.
Solvent: In order to make raw rubber or mixed rubber form a colloidal solution, it needs to be dissolved in an appropriate solvent. Commonly used solvents include gasoline, benzene, carbon disulfide, carbon tetrachloride, chloroform, etc. The choice of these solvents depends on the purpose and performance requirements of the plastisol.
Classification and characteristics:
Non-vulcanized plastisol or raw plastisol: This type of plastisol does not contain vulcanizers or accelerators and is mainly used in occasions where long-term adhesion is required, such as electrical insulating tapes, medical adhesive plasters, etc.
Vulcanized plastisol or mixed plastisol: This type of plastisol contains ingredients such as vulcanizers and accelerators. After applying the plastisol, it needs to be vulcanized to form a stable bond. The vulcanized plastisol has a higher bonding strength and is suitable for occasions that need to withstand greater forces, such as raincoat plastisol.
Environmentally friendly plastisol: With the improvement of environmental awareness, water-based plastisol (water glue) has gradually been widely used. Water-based plastisol uses water as a solvent and does not contain organic solvents, so it is less toxic, has good composite properties, saves energy and reduces waste. It uses a variety of synthetic polymer compounds with different properties for compounding and compounding to form organically combined products with different properties.