Tech. Info 02
Micronized Silica (SS-SIL)
When acid is added to sodium silicate, silica sol with primary particle is created. Radical dehydration condensation reaction is promoted at silanol (Si-OH) on the surface of primary particle by continuous adding of acid. As a result, net work(Si-O-Si) is formed and three dimensional strutures are generated. This is so called Silica gel. Physical properties are controlled via washing and drying processes and finally Micronized silica is produced by grinding it. Theoretically very simple but practically very delicate high tech industry it is to control each physical property on each application. Amorphous porous silica gel is raw material of SS-SIL and according to the degree of porosity basic properties are diversified. SS-SIL has various grades according to the difference of particle size or surface treatment (coating or substitution). SS-SIL has irregular three dimensional network structure having SiO₄ regular tetrahedron a basic structure that it's amorphous without regular structure like quartz. the inner part and the surface of silica gel with three dimensional network structures have a lot of silanol (Si-OH) that shows porous structure.
Manufacturing process
Matting agent for paint, ink
[ Advantage of SS-SIL for paint industry ]
Anti-blocking and processing aids for PLASTIC
[ Advantage of SS-SIL in plastic ]
Processing aid for PAPER
[ SS-SIL as a filler or processing aids for papers is available in grades with different properties in the following recording papers ]
Other applications
Filtering agent
SS-SIL has great influence on manufacturing pure drink by filtering protein in it. SS-SIL is not harmful to human body because it is highly refined and has excellent adsorptive powder owing to plenty of minute pores strictly controlled. By controlling moisture contents it prevents dusts on working.
Application : beverages (beer, drink), food, edible oil.
Moisture remover/ coagulation preventer
If moisture exists in zinc paint for or alumina paint, hydrogen gas occurs and it makes crack. Micronized powder makes heterogeneous color distribution owing to moisture during storage, transport and handling. SS-SIL has great adsorptive powder thus when added to power-type products, moisture is easily removed. Also it's not harmful to human body, SS-SIL makes it possible to take food custody for a long time when used as a food additive. Application : instant food, powder-type food (salt, sugar), animal food.
Powder additives
SS-SIL can store liquid additive, perfume or effective component because it's not harmful, has lots of minute pores and microscopic particle size. Also these components can be changed to powder-type and quantitative input is easily controlled
Application : tooth pastes, medicines, foods, chemicals, etc.
Dentifrice
SS-SIL is used as functional material tooth paste because it's high purity micronized powder which is chemically stable. Comparing to normal precipitation silica it has high purity and low bulk density thus additive efficiency is excellent
Application : tooth pastes, medicines.
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