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Sanitary Napkins Vampire Resin
Polymer water absorbent resin (SAP) is a typical functional polymer material, SAP for short. It can absorb hundreds or even thousands of times its own weight of water, and has a strong water retention ability, so it is also known as super water absorption agent or high water retention agent. The health field is mainly used as raw materials for sanitary napkins and diapers.
—CH2=CH-COOH + NaOH → —CH2=CH-COONa+H2O
n (-CH2 =CH-COONa) →[-ch2-ch (COONa)]n
Sodium polyacrylate → Bridge into a network structure
The internal ion concentration is higher than the external, resulting in osmotic pressure.
In true production, it is very vital whether or not SAP and fluff fiber are blended evenly, which is at once associated to the dimension of the product's liquid absorption overall performance and the uniformity of the liquid absorption, and additionally performs an essential position in heading off gel adhesion and tough spot penetration of the floor of the paper web, stopping the slide between layers.
Keep SAP dry
Before the SAP powder and fiber are evenly mixed, it is indispensable to keep the dryness of SAP, which immediately impacts the metering, transportation, dispersion of SAP and the mixing uniformity of SAP and flume fiber.
SAP particle measurement and PH cost requirements
When the particle dimension is 100~120mesh, the absorption ability is the best. When PH cost is 6~8, the absorption fee is maximum.
SAP of smaller particles may additionally have a poor impact on absorption charge and reosmosis, and additionally have a tendency to clog pores.
The quantity of SAP in dust-free paper
The most quantity of SAP in dust-free paper can be as excessive as 55%, and the quantity of SAP in dust-free paper normally relies upon on the use of the product. If used as the absorptive core layer of sanitary napkins, pads, etc., the SAP content material is 20~25%, if used as toddler diapers, person incontinence products, agricultural and forestry water conservation, the quantity of SAP is 30~35%.
SAP necessities for lint fibers
It is required that the fluffy fiber is soft, the fluffy diploma is high, the fiber is thick and lengthy (2.7~3.0mm), the content material of first-rate fiber is low, the integrity of the mat is good, the mesh fiber is uniform, the community anxiety is extra than 7 N, and the adhesion to SAP is strong. In the genuine manufacturing greater appropriate for GP, NF485 and different fashions of fluff board.
