●Overview:

When manufacturing ice packs, apart from mesh size, the following factors are even more crucial:

· Absorption rate (water retention capacity): This is a key indicator, indicating how many grams of pure water 1 gram of SAP could absorb and retain. The absorption rate of high-quality ice bag SAP is usually between 100 times (i.e., 1 gram absorbs 100 grams of water) and 150 times.

· Gel strength: The compressive resistance after absorbing water, preventing water from leaking out when squeezed.

· PH value: Generally required to be neutral, ensuring safety for the contents (such as food) and the human body.

· Technics: SAP is uniformly mixed in the non-woven fabric bag within ice pack, or it may be combined with other materials. This also affects the selection of mesh size.

●Corresponding grades and characteristics

This application are mainly using sodium polyacrylate

SR820: It has excellent water retention rate and gel strength, which are very critical to ice packs area.