Alginates manufacturing process

Solutions of sodium alginate interact with an ionized calcium salt, resulting in the instantaneous precipitation of insoluble calcium alginate, which can then be further processed. Introducing varying proportions of sodium ions during manufacture can produce products having different absorption rates. 

The UK was the only producer of alginate fiber until 1971. The fiber was made into soluble yam, which would dissolve in the scouring process. It was also used to make fabric for supporting fine lace during manufacture, as a draw thread in krtitting and a small proportion of alginate fiber was utilized in the medical field. ... 

Cochrum, K., Dorian, R. and Jemtrud, S. (1996), Non-fibrogenic high mannuronate alginate coated transplants, processes for their manufacture, and methods for their use , US Pat. 5693514. 

Creamed latex is made by the use of a creaming agent such as ammonium alginate. The creaming agent helps form a rubber-rich layer at the top of the holding tank. This is a slow process several weeks may be required before the desired concentration is reached in the top layer, which is drawn off for shipment. Creamed latex has a minimum dry rubber content of 62% and is preferred by rubber thread manufacturers because of its good filterability. 

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