Moisture Scavenger Packets And Strips For Dried Aquatic Products
Aquatic products are the products that Marine and freshwater fisheries production of aquatic animal and plant products and processing products. Includes :(1) fish, prawns, crabs, shellfish, algae, sea animals and other fresh food produced by fishing and farming; (2) processed products that have been frozen, cured, dried, smoked, cooked, canned and comprehensively utilized. Aquaculture food is nutritious and has different flavors. Low value fish and processed waste such as fish meal, strong fish juice is an important protein feed. Protein fresh products made from aquatic animals and plants, such as fats and oils, gels, vitamins, hormones and other products, are chemical and pharmaceutical products with a variety of uses.
Aquatic products, according to the place of production, can be divided into two categories : Marine products and freshwater products ; After fish catching , if do not take effective measures to keep fresh immediately, it is easy to corrupt and deteriorate. Therefore, according to the preservation conditions, it can be divided into fresh aquatic products, frozen aquatic products, and dry products. Dried products can be divided into fish dried products, shellfish dried products, shrimp dried products, algae dried products, other dried aquatic products.
Microorganisms , like bacteria, yeasts and molds , their growth and reproduction and the activity of inherent enzymes in food, which are often the main causes of deterioration of aquatic products. The activity of microorganism and enzyme is related to temperature and water. When the temperature is lowered, the microorganism will stop reproduction or even die, and the enzyme will weaken or lose its ability to decompose. Similarly, reducing water also inhibits the growth and reproduction of microorganisms and molds, and reduces the activity of the inherent enzymes in food. Thus, the aim of prolonging dry goods shelf life of aquatic products is achieved.
Desiccant is a substance that removes moisture from moist products. There are two different types: chemical desiccant, such as calcium sulfate and calcium chloride, which are combined with water to form hydrate for drying. Physical desiccant, such as silica gel and activated alumina, is dried by physical adsorption water.
The desiccant that used in food , like aquatic products , must be non-toxic, tasteless, no contact corrosion, no pollution of the environment of the material. But the laboratory desiccant such as sulfuric acid, alkali lime, is too dangerous, even if they also have advantages, such as absorber water fast, high efficiency, low price and so on, can not be used in food. The commonly used desiccant in food are Lime desiccant and Silica gel desiccant, Montmorillonite desiccant and Calcium chloride desiccant.
The main component of Lime desiccant is calcium oxide, which can absorb water through chemical reaction. No matter the humidity level of the external environment, its moisture absorption capacity can be maintained at over 35% of self-weight . It is more suitable for low temperature preservation, with excellent dry moisture absorption effect and low price. Can be widely used in food, clothing, tea, leather, shoes, electrical and other industries.
Silica gel desiccant is a kind of silica gel with high microporous structure. It is non-toxic, tasteless and odorless. It has stable chemical property and strong hygroscopic property. Therefore, it is widely used in the storage and transportation of instruments, equipment, leather, luggage, shoes, textiles, food and medicine to control the relative humidity of the environment and prevent the goods from dampness, mildew and rust. For example, the Silica gel desiccant which is used inside xylitol , is the only one that approved by the European Union.
Montmorillonite desiccant is made of pure natural bentonite, which is green, non - toxic and tasteless. It has good adsorption performance at room temperature and general humidity, with adsorption activity, static dehumidification and odor removal. It not only has a fast adsorption speed and high adsorption capacity, but also is non-toxic, tasteless, non-contact corrosive and does not pollute the environment . Scope of application: it is widely used in the products that cannot use oil seal and gas phase seal, such as: optical instrument, electronic product, medical health care, food packaging and dry air seal for military products and civil products.
The main raw material of calcium chloride desiccant is calcium chloride, which is made from high quality calcium carbonate and hydrochloric acid through reaction synthesis, filtration, evaporation concentration and drying process. White porous block, granular or honeycomb solids. Taste slightly bitter, odorless. The aqueous solution is colourless. It is mainly used as raw material for producing other calcium salts in inorganic chemical industry. It is also used as a drying agent for gas and as a dehydrating agent in the production of alcohol, ester, ether and acrylic resin. In the food industry as calcium fortifier, curing agent, chelating agent, drying agent.