What is the Difference between slime layer and capsule?

A glycocalyx is considered a slime layer is when the glycoprotein molecules are loosely associated with the cell wall. Bacteria that are covered with this loose shield are protected from dehydration and loss of nutrients. The glycocalyx is considered a capsule when the polysaccharides are more firmly attached to the cell wall. Capsules have a gummy, sticky consistency and provide protection as well as adhesion to solid surfaces and to nutrients in the environment. Bacteria that possess capsules are considered to be encapsulated, and generally have greater pathogenicity because capsules protect bacteria, even from phagocytic white blood cells of the immune system. The adhesive power of capsules is also a major factor in the initiation of some bacterial diseases.

http://microbiology.suite101.com/article.cfm/bacterial_surface_coating_or_glycocalyx#ixzz0I3AXLpWr&D