Characteristics of silica gel material

Characteristics of silica gel material

A. Silica gel raw materials are generally gel-like, somewhat similar to plasticine, colorless translucent, tasteless.

B. Its main characteristics are both high temperature resistance (maximum 300℃) and low temperature resistance (minimum -100℃), is the best cold resistance, high temperature resistance rubber; At the same time, good electrical insulation, high stability to thermal oxidation and ozone, chemical inertness. Disadvantages are low mechanical strength, oil resistance, solvent resistance and acid and alkaline resistance, more difficult to vulcanize, the price is more expensive. Operating temperature: -60℃ ~ +200℃. These are the instructions for silicone rubber in the manual.

C. Operating temperature: generally set at -40℃ -- 200℃, in a short time can reach 230℃.

D. Aging problem:

Oil resistance, acid and alkaline resistance is poor, and the force situation has little relationship.

E. Bonding problem: Before surface treatment, in addition to using silicone products as adhesive and silicone parts, and other parts must be activated by surface vulcanization treatment to stick. All the substances that can vulcanize with rubber or make it crosslinked are collectively known as vulcanizing agent, also known as crosslinking agent. There are many kinds of sulfide agents, and the number is increasing. Sulfur, selenium, tellurium, sulfur-containing compounds, metal oxides, peroxides, tree esters, quinones and amines have been used.

F. Material hardness: According to Shaw hardness, the adhesive can be selected between 10 degrees and 80 degrees in the domestic market theoretically. The ones you can easily find are usually between 20 and 70 degrees, with the most common being between 40 and 50 degrees.

Production technology of silica gel products

A Raw material shape and color

After color mixing, B is made of milky white silica gel with various colors. After mixing and shaping, C is pressed into strips of raw materials and cut into a strip of material.

D vulcanization molding