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Silica gel product knowledge(Hits:) 
Origin Author Add Time2012-10-04
fontSize: T|T

Everyday life often said the food grade, is can be exposed to food but not affect the quality of the food, and is not harmful to the human body 's standard. Judge a kind of material is it right? Food grade, according to whether this material through the food safety regulations of the relevant test.

Food use silica gel is made from silicate polymerization from inorganic polymer colloid material, the main ingredient is SiO2· nH2O, its content is above 98%, non-toxic and tasteless, stable chemical property, under normal conditions in addition to the caustic and hydrofluoric acid, acid salt reacts with any. Because it is a kind of colloidal structure, so it has many micropores and large specific surface area. Edible pore size of about 8-10nm, specific surface area of 300-500m2/g, and surface hydrophilic, water has a very strong absorption ability, in high humidity conditions the water absorption capacity up to its own weight above 80%-100%. So food grade silicone can be used as food, medicine for external use desiccant. Due to the consumption of the silica gel is a refined and after sterilization, and food and drug according to requirement of mixed directly after drying and ensure food and food consumption, and the human body without any side effects.

Its main features are: 1 non-toxic, odorless, high transparency, non-yellowing; 2 soft, good elasticity, resistance to kinking deformation; 3 does not crack, long service life, cold temperature; 4 has higher tensile strength and superior electrical properties;

It has high transparency, tasteless, yellowing, spray cream etc., especially solve the black hose spray cream, blue products fading problem, soft, high tear resistance, high insulation resistance, wear resistance, high temperature resistance, flame retardant, aging resistance, and environmental protection, tensile strength, stable performance etc.. Widely used in coffee pot, bread machine, water heater, disinfecting cabinet, water machine, kettle, iron, rice cooker, frying pan, fruit juice machine, appliance and other mechanical products, machinery, electrical appliances, electrical and other industries. Such as: drinking fountains, coffee pots, hairdressing equipment and lighting products in the protective sleeve; fireproof silicone hose: resistant to combustion, high pressure resistance, high temperature resistance and environmental protection etc.

According to the United States FDA requirements, food contact silicon rubber products must meet the following three conditions:

1 never released on human health risk components.

This requires that the product itself does not contain toxic substances, and products must be sufficiently stable chemical properties, not being natural oxidation corrosion.

2 can't cause food ingredients produced unacceptable change.

Products can not contact with things occur chemical reaction, the product itself is not because of exposure to a food composition changes.

3 can not reduce the sensory properties of food ( the food taste, odor, color change )

The above three conditions are emphasized in food grade silicone rubber chemical stability, we understand the time to consider the different environment on the stability of silicone rubber. In order to test food utensils whether meet the above three conditions, to the product of several aspects of the test. World test standard is slightly different, such as the German LFGB standards require silicone rubber products for the following test:

3 overall migration test;

( VOC ) organic volatiles to volume;

The peroxide value test;

The organic tin compounds test;

The sensory test.

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