The secret of water-absorbing polymer is simply a long chain of repeating molecules with a hydrophilic (water-attracting) group attached that are cross-linked to form a network structure. This structure creates a three-dimensional matrix with plenty of space between the polymer chains that absorb up to 400 times water and retain large amounts of liquid relative to its weight. The absorption mechanism of SAPs is primarily driven by osmosis and capillary action. When exposed to water, the hydrophilic polymer chains attract and trap the liquid molecules within their network. As water enters the structure, the chains swell, creating spaces for more water to be absorbed.
2. What is SAP?
SAP known as Super Absorbent Polymers possess remarkable water-
locking abilities that make them indispensable in various industries.
These synthetic substances possess an extraordinary capacity to absorb
and retain vast amounts of liquid, making them invaluable across
various fields, from personal care products to agriculture and beyond.
But what exactly makes super absorbent polymers exceptional?
3. • SAPs employ osmosis and capillary action to
absorb and retain moisture.
• When exposed to water, the hydrophilic
polymer chains within SAPs attract water
molecules, drawing them into the polymer
matrix.
• Capillary forces further facilitate the
absorption process by pulling water into the
interior spaces of the polymer structure
Absorption Mechanisms
4. The efficiency of SAPs in locking water depends significantly on the
density of cross-linking within the polymer matrix. A higher cross-
linking density generally results in a more rigid structure with reduced
swelling capacity, while lower cross-linking density allows for greater
swelling and absorption.
Cross Linking Density
5. Versatility & Applications
• It is commonly used in hygiene products such as
diapers, protective garments, etc.
• In the medical field, polyacrylate-based SAPs find
application in wound dressings.
• It is also useful for many applications like Artificial
Snow, Surgical dryers, Reusable hot/cold packs, ice
gel packs, food packaging, and fire protection.
• It is a valuable aid in the propagation of seedlings,
promoting their successful establishment and
growth.
7. Reduce additional cooling cost
up to 20%
03
02
01 Save 25% more water; Efficiently
locking in moisture
Enhances Water Retention by 50%
for prolonged effectiveness
