Printing & Textile Industry
It is a long history that sodium alginate is used for printing paste, yarn paste and cleaning paste. It is one kind of excellent paste for printing, which is applicable for printing of cotton, feather, silk and compound fiber especially after active coloring matter become. It has several decades of history and there is no other things can be compared with it at present.
The largest characteristic is that it can’t react with active coloring matter and can’t produce covalent bond. It doesn’t contain hydroxymethyl and only contain CHOH; meanwhile, there is carboxyl with strong negative electricity on its base ring. Therefore, it not only absorbs coloring matter, but also has exclusion that can make coloring matter move towards fiber from paste; furthermore, it has good effect for printing that keeps good definition and equality and makes printing become clear, fresh and high color content; meanwhile, it also makes printing have good feel and fastness.
Moderate and low viscosity sodium alginate is suitable for screen cloth type printing and manual printing with pseudo rheological characteristic that means it will turn rare after cutting and resume original viscidity after losing cutting. It is suitable for printing exquisite grain, full and wet on wet printing with many good characteristics such as fine lines, clear figure and large area printing equality etc.
Food Industry
Sodium alginate is widely used in food industry.
a. Man-made food: sodium alginate takes alga blubber skin, alga blubber thread, and artificial wine and artificial cherry as raw material.
b. Cold food: as stabilizer of ice cream and ice cream bar, sodium alginate has dense organization and slow dissolves speed. It is also the main raw material for tasty jelly and grass jelly.
c. Cake food: as stable molding agent of cake (biscuit, bread, noodle and chocolate etc.) and polish of bread, sodium alginate can make cake sweet and crisp, make noodle smooth and reduce broken rate of noodle and crash of bread. Sodium acetylide is good thickening agent for jam, chili sauce, jell, redeye, fish cake, pudding and salad sauce and so on.
d. Beverage: sodium alginate can be used as clarifier of alcohol and stabilizer of beer.
e. Refrigeration and keep fresh: it can prevent bacilli from entering into fruit and meat if wipe one film of sodium alginate on food, which can also restrain water evaporation and prolong storage time.
