EMOLLIENT FOR DISPOSABLE ABSORBENT ITEMS
BACKGROUND OF THE INVENTION Disposable absorbent articles, such as disposable baby diapers, adult disposable diapers, training pants, incontinent articles, feminine pads, panty-protectors and other similar articles, are articles intended for absorb and contain exudates from the body and discard after use. There is an infinity of proposals aimed at improving the characteristics of this type of products, some aimed at improving absorption and retention, others to eliminate draining, some more to make articles soft and comfortable for the user as well as discrete, others to reduce costs, etc. Another line of research to improve this type of articles is aimed at protecting the user's skin, so that chafing is avoided and the skin is kept healthy and lubricated. For many years it has been tried to incorporate different types of lotions to the disposable absorbent articles to improve the conditions of the skin during its use; examples of these attempts are US Pat. No. 3,585,998, Hayford et al .; US 3,464,413, Goldfarb et al .; US 3,896,807, from Buchalter; US 3,489,148, Duncan et al., And many others not mentioned for brevity. These formulations have not been up to date sufficiently efficient, which is why alternatives have been sought to apply to the upper layer of this type of articles that really protect the user's skin. Other more recent examples of formulations used for this purpose are US Pat. No. 5,693,037, assigned to Procter & Gamble, which describes the use of a silicone-based surfactant; US 5,830,487, to Procter & Gamble, which describes a lotion containing an organic acid, such as citric acid, and hydrophilic solvents such as propylene glycol, so as to kill the viruses and impart softness to the upper layer; US 5,869,033, to EnviroDerm Pharmaceuticals, discloses a fabric incorporating a dispersed organoleptic clay, preferably in a matrix of superabsorbent material; US 5,938,649, to Drypers Corporation, which discloses the use of aloe vera in the top layer of a disposable absorbent article; US 6,287,581, Kimberly-Clark, which describes the use, on the surface of such an article, of a hydrophobic composition enriched in lipids, comprising a natural oil, a sterol, a surfactant, a humectant and an emollient, as well as many other patents not mentioned for brevity. The present invention proposes a formulation of natural origin to be applied on the surface of a disposable absorbent article that will be in contact with the user's skin, in order to protect the skin and help control odors; The formula contains emollients and odor control agents. Chlorophyll or one of its derivatives is used as an odor control element and vegetable oils, such as avocado oil and / or sweet almond oil, as emollients. On the other hand, the addition to the formula of some anti-microbial ingredient and of a surfactant is also contemplated. OBJECTIVES OF THE INVENTION One objective of the invention is the use of a formulation to protect the user's skin during the use of disposable absorbent articles, such as disposable diapers, feminine towels, panty-protectors and incontinence articles, which also helps to control the bad odors generated by body exudates. Another object of the invention is that said formulation is preferably of natural origin. A further objective of the invention is that the formulation also helps to stop the growth of microorganisms on the surface of the article. Detailed Description of the Invention Disposable absorbent articles are articles that are used in contact with the body to receive and contain the exudates thereof. Among them, can be counted on disposable diapers for babies, training shorts, feminine towels, panty-protectors and incontinence articles. It is desirable that this type of article helps to protect the skin of the user, since the constant rubbing of the skin with the upper layer and the contact of the same with the humidity and with the feces can cause slight injuries and discomfort in the user . There are an infinite number of proposals aimed at protecting the user's skin by using lotions that contain various compounds that soften the upper layer and lubricate the skin, but none of these contemplates the use of elements of natural origin mixed in a solution so that act together to lubricate the skin and eliminate the bad odors characteristic of body exudates. The present invention contemplates the use of vegetable oils rich in vitamin E, preferably avocado oil and / or sweet almond oil, in a solution that also contains a natural element for odor control such as chlorophyll, so that the solution is applied on the top layer of a disposable absorbent article in order to protect the wearer's skin and help control odors. Vegetable oils contain, among other compounds, vitamin E, a natural source of alpha, delta and gamma tocopherol, anti-oxidants and inhibitors of free radicals that cause aging and dry skin, being the most efficient, delta tocopherol.
On the other hand, synthetic vitamin E contains about 95% alpha tocopherol and only about 1% and 5% delta tocopherol, while natural vitamin E, present in vegetable oils, such as avocado oil and sweet almond oil, among others, contains about 75% delta tocopherol, being much more efficient in the elimination of free radicals and therefore in the lubrication of the skin, than synthetic vitamin E. In addition to vitamin E, vegetable oils contain monoglycerides, diglycerides and triglycerides, elements that contribute significantly to soften the skin. Vegetable oils rich in vitamin E are efficient used as emollients in amounts ranging from about 0.25% to 4% by weight. On the other hand, chlorophyll or its derivatives, such as copper chlorophyll, sodium or potassium, are natural adsorbents that, through van der Waals forces, attract odor-generating compounds, which adhere to the chlorophyll molecule, being trapped in it. Therefore, chlorophyll and its derivatives have been recognized as being powerful deodorantes, and used together with vegetable oils rich in vitamin E, form a solution that also helps lubricate the skin and keep it soft, neutralizes odors. In the proposed formula, chlorophyll or its derivatives are efficient used in amounts of about 0.01% by weight. Both vegetable oils and chlorophyll are insoluble in water, so, to make an aqueous solution with them, it is necessary to add a surfactant in the present invention, it is proposed the addition of compounds made from soy ethoxylate, given that, in addition to being surfactants, these compounds also help to neutralize odors, acting in synergy with chlorophyll. Notwithstanding the foregoing, other surfactants may be used. The surfactant is present in the formula in a minimum amount of about 1% by weight. Thus, a formula containing vegetable oils rich in vitamin E, chlorophyll and surfactants is obtained. As a vehicle for the solution, for example, pharmaceutical-grade propylene glycols (USP) can be used instead of water to prevent the growth or development of microorganisms. According to the above, the proposed formula for being applied to the upper surface of a disposable absorbent article contains about 0.25% to 4% by weight of vegetable oils rich in vitamin E, about 0.01% to 3% by weight of chlorophyll , about 0.5% to 3% by weight of a surfactant, and about 90% to 99.24% by weight of a vehicle. In addition, optionally, the formula can be added with some anti-microbial agent, such as 2,4,4'-trichloro-2'-hydroxydiphenyl ether (CAS No. 3380-34-5), anti-microbial agent that has been successfully used in skin care products, hand sanitizers and in household products, commercially available under the name of Triclosan. The primary benefit of Triclosan is its anti-microbial activity, including most of the gram-positive, gram-negative, fungal and yeast bacteria. Another additional characteristic of Triclosan is its anti-inflammatory activity: it has been shown to be a potent inhibitor of cyclo-oxygenases and lipoxygenases, enzymatic keys of the metabolism of arachidonic acid, resulting in reduced formation of pro-inflammatory metabolites. The optional anti-microbial agent may be present in the formula in amounts ranging from about 0.01% to 1% by weight. In general, to this type of articles some fragrance is added to make them more attractive to the consumer; the fragrance can also be contained in the proposed formula, so that in a single operation the emollient formula with odor and fragrance control is added to the product. While the invention has been described in terms of a presently preferred embodiment, it is clear that various changes and modifications may be made therein, such changes and modifications being within the spirit and