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HydroSorb
Polypropelene polymer is used in the manufacture of nonwoven webs that are employed in the construction of absorbent articles such as diapers feminine care products and personal incontinence products and the use of such nonwoven webs are limited because of their hydrophobic nature. Coating methods to provide a hydrophilic surface are known, but also have some limitations. The extra step required in coating preparation is expensive, time consuming and requires specialized equipment Many of the solvents used for coating are flammable liquids or have exposure limits that require special production facilities. When coated out of aqueous solutions, the water must be subsequently removed in an oven, which is energy intensive and costly since water has a high heat of vaporization, causing line speeds to be slow. Furthermore, the quantity of any surfactant used to provide the hydrophilic surface is limited by the solubility in the coating solvent, the amount of the coating applied, and potential foaming problems.
HydroSorb is a hydrophilic additive Masterbatch which imparts hydrophilic property to PP nonwoven fabric in the melt itself. There remains no requirement for additional surface coating treatment followed by PP fiberweb extrusion.
Applications
- PP nonwoven fabrics used for diapers, feminine care products, and personal incontinence products
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