Hydrogel products constitute a group of polymeric materials, the hydrophilic structure of which
renders them capable of holding large amounts of water in their three-dimensional networks.
Extensive employment of these products in a number of industrial and environmental areas
of application is considered to be of prime importance. As expected, natural hydrogels were
gradually replaced by synthetic types due to their higher water absorption capacity, long service
life, and wide varieties of raw chemical resources. Literature on this subject was found to be
expanding, especially in the scientific areas of research. However, a number of publications
and technical reports dealing with hydrogel products from the engineering points of view were
examined to overview technological aspects covering this growing multidisciplinary field of