Talking About Super Absorbent Polymer Diapers

1.Super absorbent polymer diapers

With the popularization of the application of baby diapers, people's research on the application of diapers is getting more and more in-depth. The basic materials of diapers include non-woven fabrics, super-absorbent resin (SAP), hot-melt adhesive, etc. The research and development system for super-absorbent resin has basically matured, and a number of leading suppliers have emerged, such as Sumitomo and Catalyst abroad. , German BASF, domestic Formosa Plastics, Satellite, Denson, Nuoer, etc. The current problem is how to rationally apply the mature SAP in diapers, and how to choose SAP to make a dry and comfortable diaper. This article briefly introduces the definition and verification methods of super absorbent polymer diapers.

2. Definition of superabsorbent resin

Super Absorbent Polymer (SAP) is a new type of functional polymer material that can absorb liquids that are hundreds to thousands of times heavier than itself, and has excellent water retention properties. Once it absorbs water and swells into a hydrogel, it can It is also difficult to separate the water. Therefore, it is widely used in various fields such as personal hygiene products, industrial and agricultural production, and civil engineering.

Superabsorbent resin is a kind of macromolecular material containing hydrophilic groups and cross-linked structure. It was first prepared by Fanta et al. by grafting polyacrylonitrile with starch and then saponifying it. Divided by raw materials, there are starch-based (grafted, carboxymethylated, etc.), cellulose-based (carboxymethylated, grafted, etc.), synthetic polymer-based (polyacrylic acid, polyvinyl alcohol, polyoxygen Vinyl, etc.) several categories. Compared with starch-based and cellulose-based superabsorbent resins, polyacrylic acid-based superabsorbent resins have a series of advantages such as low production cost, simple process, high production efficiency, strong water absorption capacity, and long product shelf life, and have become a research hotspot in this field.

3. Verification method

The most basic requirements of diaper products are no leakage of urine and dryness. To ensure that the product does not leak urine, it is first necessary to ensure that the core of the diaper has a certain urine storage capacity. Through the CRC performance test of SAP, the centrifugal water retention capacity of SAP can be obtained. The so-called water retention capacity refers to the ability of the expanded body after absorbing water to maintain its aqueous solution without segregation. state capabilities. Combined with the data analysis of the average daily urine volume of a large number of infants and young children, the reasonable amount of SAP added in different sizes of diapers can be calculated, and the minimum amount of each SAP can be basically obtained by this method. The dryness of diapers depends on the colloidal strength of the SAP used. On the one hand, SAP with high colloidal strength still maintains a certain strength after absorbing liquid and swelling, which is conducive to maintaining the gaps between SAP gels and reducing the gel blocking effect; on the other hand The larger colloid strength can also ensure that the liquid locked by SAP is not easy to be squeezed out by external force, ensuring the dryness of the product. To sum up, this article introduces the meaning and verification method of super absorbent polymer diapers, so that consumers can further understand the material.