Sodium alginate, also known as sodium alginic acid, seaweed gel, algin, alginate, is a natural polysaccharide extracted from kelp carbohydrates is mainly used in textile, printing and dyeing industry, in the pharmaceutical, paper making, casting, cosmetics and so on also has a wide range of applications. Are widely used in food, medicine, textile, printing and dyeing, paper making, daily chemical products, such as a thickening agent, emulsifier, stabilizer, adhesives, sizing agent, etc.

Molecular formula: C5H704COONa molecular weight: 216

Sodium alginate and printing industry

Sodium alginate used as warp sizing, pulp, printing slurry has a long history, but mainly used in printing paste. Sodium alginate is used as reactive dye printing ink, with unique properties. Fiber and reactive dyes for chemical reaction, the dye fixation on fiber, used in the process of dyeing printing paste should not interfere with or participate in chemical bonding. If paste in response, will be fixed on the fiber, it can make fiber dyed hair feel hard, brittle, colour and lustre is bad. When using sodium alginate for printing slurry, neither affect the dyeing process of reactive dyes and fibers, at the same time the printed pattern clear, bright, give a color quantity is high, feel is good, suitable for cotton fabric color not only, also suitable for wool, silk, synthetic fiber and other textile printing and dyeing.

Medium viscosity and low viscosity of sodium alginate was suitable for the screen printing to the requirements of rotary printing paste. Actually with low viscosity of sodium alginate stability of the preparation of printing paste, which made the preparation of high content of printing paste, the printing paste can lead to produce dense membrane in the drying process, make the tinctorial yield increase.

Sodium alginate and the short asbestos fiber blend, after solidification treatment, calcium acetate solution can prevent the asbestos fiber, affect human body health.

Sodium alginate and other industries

Replacing parts of the rosin sizing with water-soluble sodium alginate paper pulp dispersant or paper surface sizing, can increase the paper surface smoothness, and can adjust the printing ink, wax, oil absorption, improve the rub resistance of the paper. Electrode is negative: the covering material and sodium alginate, potassium alginate, calcium alginate, mix can be negative coated adhesive materials, make enough plasticity in the extrusion process, and in the use of the welding process is easy to burn into ash, reduce the splash.

In addition, sodium alginate can be used in resin coating, rubber paste agent, battery pole insulation layer and water treatment. In agriculture, can be used as seed treatment, pesticides, antiviral materials for application.