Activated Carbon in Colored Absorbent Articles
Publication Date: 2001-Aug-09
The IP.com Prior Art Database
Activated carbon can be used to enhance colored absorbent articles, especially dark colored articles, without objectionable aesthetics.
ACTIVATED CARBON IN DARK ABSORBENT ARTICLES
Jeffrey D. Lindsay. Fung-Jou Chen, and Richard Tanzer
Activated carbon has long been used for the adsorption of odors and other objectionable compounds. However, the use of activated carbon in disposable absorbent articles such as diapers or sanitary napkins has been limited by its black color. Objections to the black color of activated carbon are irrelevant when the absorbent article itself is dark. Indeed, the black color of activated carbon may be desirable, depending upon the desired appearance of the absorbent article. Dark sanitary napkins have now been introduced for use with black underwear, exemplified by products sold under the ALWAYS(r) label of Procter and Gamble, and further disclosed in European Patent Application 1,108,406 A2, "Dark Colored Absorbent Articles," published June 20, 2001. Such articles can be improved by the addition of dark activated carbon products within or attached to the products to enhance their odor adsorption properties. The activated carbon can be in the form of particulates, fibers, or fabrics, and may be attached to the article as a layer, dispersed with other absorbent material, enclosed in a layer of nonwoven material or tissue, or provided in other ways known in the art to incorporate activated carbon into an absorbent article.
The activated carbon need not be black, but can be treated with colorants to be other colors such as gold, red, blue, purple, and the like. Such colored particulates can have colors matching those used in colored underwear, swimwear, athletic wear, and the like. Such colorants can be adhered directly to the surface of the activated carbon or dispersed within a coating material which is then added to the surface of the activated carbon.
The colored articles in which activated carbon particles or fabrics can be used are not limited to products for feminine care, but can be any absorbent article such as diapers, incontinence briefs, sanitary napkins, wound coverings, bed pads, shoe pads, multi-use and single-use clothing articles including underwear and athletic apparel, underarm perspiration pads, disposable swimming apparel such as HUGGIES(r) LITTLE SWIMMERS(r) swimpants, and the like. In absorbent articles such as diapers, the activated carbon may be placed in a region likely to be wetted by urine, or may be placed to the sides of such a region to maintain dryness of the activated carbon.
The treated activated carbon, either as a fabric, a particulate, or a particulate bonded to a web or film, can be in regions that are likely to remain dry, such as wings of a sanitary napkin, waistbands or leg cuffs in a diaper, or remote ends or sides of an article away from the zone most likely to receive body fluids. US Pat. No. 5,037,412, issued Aug. 6, 1991 to Tanzer et al., employs this technique to help odor absorbing agents stay dry while the sanitary napkin is in use. The activated carbon can also be in the absorbent core of...