As we all know, silica gel can be divided into liquid silica gel and solid silica gel according to its physical state. These two types of silica gel are quite different in characteristics and use processes. The following will popularize the difference between liquid silica gel and solid silica gel through detailed comparisons in various aspects.
1. Appearance characteristics
Liquid silica gel is a viscous liquid with certain fluidity before it is cured. There are two types of addition type silica gel and condensation type silica gel. The method is divided into RTV room temperature vulcanization liquid silicone and HTV high temperature injection molding liquid silicone. Room temperature vulcanized silica gel can be cured after mixing and stirring AB. If it is a one-component silica gel, it is cured by attracting air and moisture. High temperature vulcanized silica gel is mostly injection molded by an injection molding machine.
Solid silica gel is soft and solid before it is molded, and it does not have fluidity. When molding, it needs to add a vulcanizing agent to mold or extrude at a certain high temperature. When demoulding, it is similar to plastic products, and the mold needs to be cleaned. It has the characteristics of high temperature resistance, cold resistance, solvent resistance, heat resistance, anti-adhesion, electrical insulation, chemical resistance, etc. It is a saturated polymer elastic material.
2. Application field
Room temperature vulcanized liquid silicone is generally used in the production of silicone molds. Compared with steel molds, silicone molds made of liquid silicone molds have huge advantages in production efficiency and production costs. They have been widely used in toys, gifts, medical, electronics, and mechanical fields. , Figure reproduction, home building decoration and decoration work, unsaturated resin handicraft work, simulated animal and plant sculpture, Buddha carving handicraft and other mold making; high-temperature vulcanized liquid silicone is usually used in medicine, food, baby supplies, diving supplies, Electrical insulation accessories and cable accessories, etc., can directly contact food and human body.
Solid silica gel is generally used in daily necessities, industrial miscellaneous items (sealing rings, silicone mats, etc.), auto parts, etc., and has a wide range of applications.
3. Cost comparison
Liquid silica gel has good stability, environmental protection, and less pollution, and the price of raw materials will be higher than that of solid silica gel.
Summary: As for the choice of liquid silica gel and solid silica gel raw materials, first of all, it is necessary to determine what product it is, and then to determine the performance of the product, and what kind of manufacturing process to choose. If the mold is more complicated or a small amount, use rtv liquid silica gel , It is more efficient to use hcr silica gel to make simple and thousands of molds. Solid silicone has requirements on the operation process and must be molded by machine, while RTV liquid silicone can be operated manually.
Post time: May-23-2023