Do you know the equipment for producing silica gel?
Author: source: Datetime: 2018-09-18 15:52:13
Silica gel has a wide range of applications. Let's go and have a look.
Properties of silica gel:
A. silicone raw materials are generally gelatinous, somewhat similar to rubber paste, colorless and translucent, tasteless.
B. Its main characteristics are high temperature resistance (up to 300 C) and low temperature resistance (down to 100 C), is the best cold and high temperature resistant rubber; at the same time, excellent electrical insulation, high stability to thermal oxidation and ozone, chemical inertia. The disadvantages are low mechanical strength, poor oil resistance, solvent resistance and acid and alkali resistance. The service temperature is between 60 and 200 degrees centigrade. The above is a description of silicone rubber in the manual.
C. Usage temperature: As described above, generally set to - 40 200, in a short period of action up to 230.
D. aging problem: oil resistance, acid and alkaline resistance is poor, and has little relationship with stress.
E. Bonding Problem: Before surface treatment, in addition to the use of silica gel products as adhesives and silica gel parts bonding, and other parts must be activated by the surface, vulcanization treatment can be bonded firmly. Any material that can vulcanize or cross-link with rubber is called vulcanizing agent, also known as cross-linking agent. There are many kinds of vulcanizing agents, but also increasing, have been used in sulfur, selenium, tellurium, sulfur compounds, metal oxides, peroxides, esters, quinones and amines.
F. material hardness: rubber parts can be selected from 10 degrees to 80 degrees in the domestic market according to shore hardness. Can easily find in general 20 degrees to 70 degrees, the most commonly used is 40 to 50 degrees.
The production process of general silicone products:
A raw material shape and color
B after color mixing, the white silica gel is changed into various colors.
After mixing and shaping C, the material is pressed into strips and cut into one piece of material.
E trimming, trimming, checking and packing.
F. finished product
The kneader is an ideal equipment for mixing, kneading, crushing, dispersing and RE-POLYMERIZATION of elastic-plastic materials with high viscosity. It has the advantages of uniform stirring and high kneading efficiency.
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