Crystals are added (to create the pores) and combined with a reinforcing agent such as cotton or flax cut to precise lengths to give the sponge strength.
The mix is then poured into a block-shaped mould and extruded onto a moving belt and heated. Once heated to a certain temperature the viscose begins to coagulate and the crystals melt. The cellulose regenerates having porous structure of a sponge.
The sponge is washed to eliminate the residual salt, colour is purified with a bleach solution and an antimicrobial agent and humectants are added. From the bun format the sponge is converted to create many different Household products.
Depending upon end use and the customer's needs the sponge may be cut to size, compressed, dried, printed and packaged.
Applications
The base sponge can be thermally compressed to create a dry and very thin sponge which can then be printed onto and packaged according to customer's requirements. They can also be cut to shape. When these foams are immersed into water they expand back to their original pre-compressed thickness.
Applications