| 摘要 |
Normally hydrophobic foams, such as polyurethane foams and polymerized water-in-oil emulsion foams, are rendered hydrophilic by means of treatment with simple surfactants and hydrophilizing agent salts. Thus, a surfactant-containing foam is treated with a solution of, for example, calcium chloride, and is dried to leave a substantially uniformly distributed residue of hydrated or hydratable calcium chloride on the surfactant-containing internal foam surfaces. In use, the combination of surfactant and calcium chloride hydrate provides a hydrophilic surface to the foam. Other h ydratable calcium or magnesium salts such as magnesium chloride can be used. The resulting hydrophilized foams are suitable f or use in absorbent devices, including diapers, sanitary napkins, bandages, and the like.
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