What’s a super absorbent polymer (SAP)?
SAP is a water-absorbing material.
1、Its main ingredient is sodium polyacrylate or potassium polyacrylate.
2、Its appearance is white powder or granule. Some special SAP can be brown or black.
3、It can absorb inorganic solution (like water); One-gram SAP can absorb hundreds grams purified water.
4、After absorbing, SAP powder will turn into water gel and lock water strongly.
Process of Absorbing (video)
Usages of Super absorbent polymer
Different usages, SAP’s characteristics will be quite different.
SAP for paper diaper:
As a water absorbing material, its water gel will be never to release water until decomposed in few weeks;
SAP for plants:
As a water retaining agent, it will absorb & release water in soil last for months (Pack Rain will last for years) and won’t be decomposed.
List of all SAP’s usages (according to function)
As a water-retaining gel: water retaining agent for plants
As a water/moisture absorption material
- paper diaper
- sanitary napkin
- nursing pad
- oil-water separation
- desiccant agent
- anti-foggy agent
- waterproof paint
As a human physiological adaptation of material
- cell material
- artificial skin
- contact lenses
As a thermal insulation material
- ice bag
- ice towel
- ice pillow
- thermal storage agent
As a water blocking material
- inflatable sandbag
- waterproof for cable
As an expanding material
- inflatable toy
- inflatable rubber
As a moisture insulating material: concrete protection
As a gel material: aromatic
As a thickening material: cosmetics
As a transparent material
- artificial vitreous body
- optical lens