Weihai Lihua Packaging Co., Ltd.

Silica gel desiccant:

Silica gel desiccant is a highly active adsorption substance, which is usually made through the reaction between sodium silicate and sulfuric acid, and then a series of processing including aging, pickling and so on. Silica gel is an amorphous material; the chemical formula is mSiO2, nH2O, insoluble in water or any solvents, non-toxic and tasteless, stable chemical properties, does not react with any substances other than alkali, hydrofluoric acid. Silica gel’s chemical composition and physical structure determine that it has many characteristics that other similar materials can hardly replace. Silica gel desiccants have high adsorption performance, good thermal stability, chemical stability, and a higher mechanical strength.

Activated clay
Activated clay is made from pure natural minerals refined with reactive diluents; the products are green, non-toxic and tasteless, without harm to the human body. The products have good adsorption performance at room temperatures and general temperatures, with adsorption activity, static moisture, odor removal and other effects.

Commonly used food preservatives

Benzoic acid is a commonly used food preservative, which is allowed to be used in all countries. It is easy to be discharged from the body of animals with feces, without accumulations, featured by low toxicity and low price, which occupies most of the domestic preservative market; Butyl hydroxy anisole (BHA) is one of the widely used antioxidants in the world, with a strong anti-microbial effect, mainly used in edible oils; the maximum amount of use is 0.2g / kg. Its disadvantage is the higher cost; BHT is one of the largest antioxidants, and the price is low, which is 1/5-1/8 of BHA; however, the oxidation resistance is not as strong as BHA, but the range of applications is the same as BHA. The disadvantage of it is high toxicity.

Desiccant is a kind of moisture removal agent that adsorbs moisture from the atmosphere. The drying principle is to absorb water molecules in a physical manner to their own structure or adsorb water molecules in a chemical manner and change its chemical structure, turning it into another substance. Desiccant, also known as adsorbent, is used for moisture-proof and anti-mildew, bringing about a drying effect; according to the adsorption and reaction products, they are divided into physical adsorption desiccants and chemical adsorption desiccants. The physical adsorption desiccants include silica gel, alumina gel, molecular sieve, activated sieve, bone charcoal, charcoal, mineral desiccant, activated clay, etc. The drying principle is to physically adsorb water molecules in their own structure.