1. In Printing And Textile Industry (Leading Use)
(1). Printing Agent
It has been a long history that Sodium Alginate is used in starching, packing and printing, mainly in printing. As a reactive printing agent, it has a special property. During the chemical reaction of fibre and reactive dye,the dye is fixed fibre and printing agent does not attend this reaction. Otherwise, the agent will be fixed in the fibre and make it hard, fragile and bad color. If you use Sodium Alginate as a printing agent, it not only affects the dyeing reaction but also makes the product outline clear, color bright, feeling smooth. This agent is also suitable for cotton, wool, silk and synthetic fibre. The products of medium and low viscosity fit for the printing requirements by net or roll style. Actually the printing agent mixed with low-viscosity Sodium Alginate is stabler than with the other viscosity, which is the result to produce a high content of printing agent. This agent will make a dense cover during drying and raising dyeing.
(2). Synthetic Fibre
Mix Sodium Alginate and asbestos short fibre, then mixture solidify the by a solution of Calcium Acetate. This treatment can avoid Asbestos fibre of flying around to harm to health.
2. In Food Industry
(1). Stabilizer
As a stabilizer of ice cream replacing starch and carrageenan, Sodium Alginate can avoid of ice crystal and make the product tasty. It also applies to the mixed drinks, such as ice lolly, iced fruit juice and iced milk, etc. When adding some into dairy products like refined cheese, canned cream and dry cheese, the final product will not stick to the package. Moreover, Sodium Alginate can keep the product fine and avoid of splitting open if it is used as a cover of mild food.
(2). Thickener and Emulsion
Sodium Alginate can raise the product’s stabilization and decrease the liquid out when it is used in salad flavoring, pudding jam, tomato ketchup and the canned products.
(3). Hydration
Sodium Alginate will make noodle, vermicelli or ice powder have a strong cohesiveness, pulling, bending and reduce breaking, special suitable in the less gluten content of wheat flour. Sodium Alginate also can equal the products’ internal form and hold water so that it can be kept for a long time. Adding some into iced sweet products, Sodium Alginate will come into being a protecting cover against heated quickly, and it can quicken the flavor sending forth, raise melting point of the products.
(4). Coacervation
Sodium Alginate suits to make kinds of gel product, which can be kept the fine state, non-leakage and contraction. So it also fits iced products and man-made products. Using this specific property, it can be used as a cover for fruit, meat and seaweed products away from air and keep it stored longer. In addition, it also can be used as the sugar coating of bread, the cover of filling and cake and the auto-coagulant of canned food, which will not change in high/low temperature and acid conditions. It also can replace carrageenan to make a crystal soft sugar, elastic, unstick, transparent.
3. In Other Industry
(1). Papermaking Starching:
When using the solution of Sodium Alginate replacing part of Rosin as dispersing agent of paper pulp of paper surface starching, it can make paper gloss and smooth, raise the absorption of printing ink, wax, soil and paper’s pliability and tough.
(2). Coating of The Welding Electrode:
The mixture of welding-coating powder and Sodium Alginate can stick and humify the coating of welding and make it easy to burn into ash and lighten flying during welding operation. In addition, Sodium Alginate can also apply to disposing of seeds, pesticide, antitoxin and antibitic.
Specifications of Sodium Alginate
| |
Industry Grade |
Food Grade |
| |
Agriculture Department Standard SC137-85 |
Export Standard |
Food additive standard |
| Mesh size |
As required |
As required |
|
| Viscosity mPa.s |
80-800 |
As required |
≥150 |
| Moisture % |
≤15.0 |
≤15.0 |
≤15.0 |
| PH |
6.0-7.5 |
6.5-7.5 |
6.0-8.0 |
| Ca content% |
≤0.3 |
≤0.3;≤0.2 |
|
| Ash |
|
≤24 |
30-37 sulfate ash |
| Viscosity decline % |
≤20.0 |
No below the requirement in the contract after one year |
|
| White degree % |
|
≥30 |
|
| Insoluble matter in water % |
≤0.6 |
|
≤0.3 |
| transparency cm |
|
≥4 |
|
| Heavy metal % |
|
|
≤0.004 |
| Arsenate % |
|
|
≤0.0002 |
| Lead (Pb) % |
|
|
≤0.0004 |
