| 摘要 |
<p>1514561 Lubricants PROCTER & GAMBLE CO 15 Sept 1975 [17 Sept 1974] 37823/75 Heading C5F [Also in Division C3] A free-flowing particulate polyurethane foam suitable for use as an absorbent body in disposable absorbent structures, e.g. sanitary napkins and tampons, contains between 0À5 and 20% wt. of a non-volatile liquid lubricant, based on the air dry weight of the foam, i.e. containing approximately 5% wt. of moisture, the lubricant having a viscosity between 10 and 1000 cp at 100‹ F. and being uniformly distributed throughout the foam. The lubricant may be hydrophilic but is preferably hydrophobic. Suitable lubricants include mineral oil, glycerine, monoglycerides, vegetable oil and silicone oil. The foam is preferably mensesphilic. The lubricant-treated particulate foam is prepared by applying the lubricant to the surface of the particulate foam preferably by spraying and preferably followed by mechanical mixing of the foam particles.</p> |
