RU2462271C1 - Deodorising wet wipes - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention refers to medicine. What is described is a wipe, a hygienic wipe such as a baby wipe, a female hygiene wipe, an incontinence wipe, a hand care wipe, a foot care wipe with said wipe containing a composition with oxidised lipids and a deodorising substance. Lipids are oxidised in the controlled environment to provide peroxide number at least 20 mecv/kg. Lipids represent, e.g. fatty acid triglycerides. Note: when publishing the grant of the patent, the initial description and the examination corrected abstract shall be used.

EFFECT: wipe shows better deodorising properties.

10 cl, 12 tbl, 2 ex

Description

FIELD OF THE INVENTION

The present invention relates to a wet towel including a base material, to which a composition has been added, adapted to perform one or more of the following tasks: cleaning, skin care, deodorization, antibacterial effect, etc.

BACKGROUND OF THE INVENTION

Deodorization has become an important factor in personal hygiene, especially in the urogenital area of the body for people using absorbent pads such as incontinence protectors, sanitary napkins / pads, diapers, etc. Unpleasant or fetid odors appear, for example, as a result of accumulations of bacteria. These unpleasant odors can be cumbersome for users of absorbent pads. Therefore, it is important to reduce or prevent the development of unpleasant odors in absorbent pads, but also to be able to clean the urogenital area of substances with an unpleasant odor and / or to prevent the appearance of an unpleasant odor.

Examples of foul-smelling substances that can appear in the urogenital area of the body in individuals using absorbent pads are sulfur compounds, aldehydes, indoles, amines, etc.

Various methods are used to prevent or reduce such odors appearing in absorbent pads. These methods are based: 1) on the masking of unpleasant odors, 2) on a chemical reaction with an acid / alkaline system, for example, according to the type of neutralization, 3) on the adsorption / absorption of bad smelling substances, including the creation of surfaces that exhibit a special affinity for bad smelling substances , or large specific surfaces / cavities that are capable of binding such foul-smelling substances, thus preventing them from remaining in a gaseous state, or 4) on the use of bacterial inhibitors that reduce / inhibit growth ktery and allocation related malodor substances, which is directly proportional to the number of bacteria.

In order to mask unpleasant / foul odors, for example, perfumes or fragrances are used. Masking compounds do not eliminate unpleasant odors, and they must be added in the right amount to be sure that the unpleasant odor will not spread, and the smell of perfume itself will not be too intense. For adsorption of foul-smelling substances, for example, zeolites, silica, clay, activated carbon and / or cyclodextrin are used. However, some of these agents are sensitive to moisture, which reduces their effectiveness. Sodium bicarbonate, citric acid and / or low pH superabsorbent materials are used to neutralize odors. Bacteria can produce substances with an unpleasant odor, and acetic acid copper, a superabsorbent material with silver ions and / or an acid superabsorbent material can be used to inhibit the growth of bacteria. The aforementioned odor-suppressing substances are effective against odors of different origin and act on the basis of different mechanisms.

Many odorants (substances emitting an unpleasant odor) are hydrophobic, and the odors emitted by them are adsorbed and / or absorbed by hydrophobic substances that suppress the smell. Hydrophobic fetid substances include, for example, some organic acids, sulfur compounds, aldehydes, indole, some amines, etc., which are often found in connection with the use of absorbent pads.

Previously disclosed substances capable of suppressing odor suffer from the disadvantage that, among other things, they are difficult to evenly distribute throughout the base material, for example, over a knitted fabric. This can be explained by the fact that previously disclosed materials capable of suppressing odors often consist of solid particles that cannot be continuously distributed over the inner and outer surfaces of the product, resulting in a decrease in the degree of coverage. Thus, the ability to effectively capture unwanted odors is reduced.

US Pat. No. 6,479,150 describes a laminate of thermoplastic fibers with a hydrophobic odor suppressing agent that is modified with a surfactant to impart wetting properties to the layers. A substance capable of suppressing an unpleasant odor is, for example, an aromatic substance masking an unpleasant odor.

GB 1282889 discloses a deodorizing composition comprising at least one calcium, aluminum, magnesium or zinc salt of an unsaturated aliphatic hydroxycarboxylic acid having at least 17 carbon atoms. It is further stated that these metal salts can be combined with saturated aliphatic hydroxycarboxylic acids and unsaturated aliphatic hydroxycarboxylic acids. Saturated hydroxycarboxylic acids can either be naturally saturated or can be obtained from the oxidation products of unsaturated fatty acids, such as oleic acid, ricinoleic acid, linoleic acid and linolenic acid. These unsaturated fatty acids with moderate oxidation lead to the corresponding pure hydroxycarboxylic acids. Pure hydroxycarboxylic acids have a very low oxidative ability with respect to other substances and a peroxide value close to 0 meq / kg.

Another important factor in personal hygiene, not only for the urogenital area, but also for hand hygiene, is the suppression of bacteria. Maintaining good hand hygiene to prevent the spread of bacteria is especially important in restaurants, kitchens, medical facilities, schools, kindergartens, etc. For people who need frequent hand washing, the aspect of skin care is also very important.

There remains a need for the development of a wet wipe, especially for personal hygiene, for example, the urogenital area of the body for people using absorbent pads, for washing hands, wiping feet, etc., so that the specified wet wipes satisfy one or more of the following requirements: , skin care, odor suppression, antibacterial effect, etc. A wet wipe can also be used to clean surfaces if it is desired to provide odor suppression and / or bacteria suppression.

SUMMARY OF THE INVENTION

In the present invention, the above problem is solved by means of a wet wipe containing a composition that includes at least one oxidized lipid having a peroxide number of at least 20 meq / kg (as measured by official AOCS Cd 8-53). Surprisingly, lipids with a peroxide number of at least 20 meq / kg have been shown to exhibit better odor suppressing properties than lipids with a very low peroxide number.

It is preferred that the oxidized lipids have a peroxide value of at least 30 or more preferably at least 40 meq / kg as measured by the official AOCS method Cd 8-53.

In a further aspect of the invention, at least 0.01 g / g of oxidized lipids is added to said wet wipe based on the total weight of the wipe.

In a further aspect of the invention, from 0.01 to 15 g / g, preferably from 0.1 to 8 g / g, more preferably from 0.2 to 4 g / g, and most preferably from 0, are added to the wet wipe. 3 to 3 g / g of oxidized lipids based on the total weight of the wipes.

In accordance with one embodiment of the invention, the lipids are fatty acids or their derivatives. In a further embodiment, the fatty acid derivatives are fatty acid esters, especially triglycerides.

According to a further embodiment of the invention, at least a portion of said fatty acids and / or fatty acid derivatives are unsaturated.

In one embodiment of the invention, said oxidized lipids are oxidized by treatment with ozone.

In one aspect of the invention, the base material is selected from: knitted fabric, spongy, mesh or film material.

In a further aspect of the invention, the wet towel is a personal care towel, such as a baby care towel, feminine hygiene product, incontinence care product, hand care product, foot care product and the like.

DEFINITIONS

The term "wet wipe" means any device for cleaning, in particular, a device designed to wipe the skin from the point of view of personal hygiene. The invention mainly relates to disposable wipes, that is, wipes that are not intended for washing or otherwise restoring and re-applying the absorbent pad after its first use. Examples of disposable wipes include small terry towels, shreds, toilet wipes, disposable handkerchiefs, wet wipes, and the like.

The term "base material" means any material suitable for wiping a surface. Suitable base materials are porous materials capable of retaining the oxidized lipid in their structure, as well as capable of absorbing substances that must be removed from the skin. Examples of suitable porous materials are knitted fabrics made from natural or synthetic fiber, or from combinations thereof. Examples of fibers include cellulose, artificial cellulose fiber (viscose, rayon, lyocell, etc.), cotton, bamboo, polyester, polyolefin fibers, and mixtures thereof. Other types of porous base materials in napkins are represented by sponges, nets, etc.

The term "lipid" means all fat-soluble (lipophilic) substances found in nature, such as fats, oils, waxes, cholesterol, steroids, monoglycerides, diglycerides, triglycerides, phospholipids and others.

The term “oxidized lipids” means that the lipids underwent an oxidation process during which oxygen was incorporated into the molecular structure of the lipid. An oxidizing agent is any agent that leads to the oxidation of a lipid structure, for example, gaseous oxygen, ozone or peroxides. Lipids are oxidized under controlled conditions, which means that the substrate, i.e. lipid, is oxidized to such an extent that further oxidation due to self-oxidation due to contact with air is prevented. The lipids are oxidized so that they have a peroxide number when measured by official AOCS method Cd 8-53, at least 20 meq / kg.

DETAILED DESCRIPTION OF THE INVENTION

In accordance with the invention, it has been shown that oxidized lipids are very effective in reducing the amount of certain unpleasant odor substances that are often found in absorbent pads and in the urogenital area of the body of users of such pads. Natural lipids of animal or plant origin very often are mixtures of mono-, di- and triglycerides and free fatty acids. Lipids can be purified, hydrated, refined, modified, and can be used individually or in different mixtures. Examples of suitable animal-derived lipids can be found in beeswax, emu ostrich fat, milk fats, lanolin, shark liver oil, lard, whale oil, cow oil and lard. Examples of suitable vegetable lipids can be found in peach oil, peanut oil, avocado oil / wax, blackcurrant oil, borago oil, Brazil nut oil, castor oil, cocoa butter, coconut oil, corn oil, cottonseed oil, oil from rosehip seeds, evening primrose oil, grape oil, linseed oil, mango seed oil, rose oil, olive oil, orange wax, palm oil, rice wax, sesame oil, shea butter (from oil tree seeds), soybean oil, p sunflower oil, peanut oil, sesame oil, safflower oil, tobacco oil, poppy seed oil, tea oil, cup oil, rice bran oil, sorghum oil, crumb oil, linseed oil, perilla oil, hemp oil, hemp oil, tung oil , palm kernel oil, sweet almond oil and wheat germ oil. Further examples of lipids are low temperature solidifying oils, which are esters of monoalcohols, for example jojoba oil, phospholipids, etc.

Triglycerides are often found in many natural fats and oils, such as rapeseed oil, olive oil, corn oil, sunflower oil, coconut liquid and semi-solid oil, palm oil, cocoa butter, etc. Most triglycerides of natural origin contain a mixture of saturated and unsaturated fatty acids, although the proportion of saturated and unsaturated fatty acids between different oils varies. This proportion is usually given as a ratio: unsaturated / saturated. Unsaturated fatty acids can be either monounsaturated or polyunsaturated. The most common fatty acids in triglycerides are palmitic acid, saturated fatty acid, oleic acid, monounsaturated fatty acid, linoleic and linolenic acids, which are polyunsaturated fatty acids.

The composition of some natural oils is shown in Table 1 below, which is borrowed from Bailey's Industrial Oil and Fat products, vol. 1, editor: Daniel Swern, John Wiley & Sons Inc., New York, 1979.

Table 1 Vegetable oil Saturated fatty acids (weight%) Unsaturated fatty acids (weight%) Olive oil 9.3-18.8 81.1-89.0 Sunflower oil 8.7-14.2 85-91 Rapeseed oil 6.2-9.5 90.5-93.8 Corn oil 12-18 82-88 Cacao butter 59.8 40,2

Such oils and fats usually contain antioxidants, either of natural origin or added by the supplier, so that self-oxidation due to contact with air is largely prevented or slowed down.

The lipids used in the present invention are oxidized by an oxidizing agent. Examples of useful oxidizing agents are: ozone, peroxides, gaseous oxygen, peracids, and nitrogen dioxide. For lipids containing antioxidants, more powerful oxidizing agents such as ozone and peroxides are required, but for lipids without any significant amount of antioxidants, contact with oxygen or air, i.e. their self-oxidation over a long period of time is quite possible.

The reactivity of various lipids depends on the number of double bonds, i.e. from the degree of unsaturation. Saturated lipids oxidize very slowly, while lipids with a high degree of unsaturation oxidize more quickly. The relative degrees of self-oxidation at 100 ° C for some fatty acids (not treated with antioxidants) can be seen in Table 2 below, which is borrowed from the same reference.

table 2 Fatty acid Chemical formula Relative oxidation state Stearic acid C ₁₇ H ₃₅ COOH 0.6 Oleic acid C ₁₇ H ₃₃ COOH 6 Linoleic acid C ₁₇ H ₃₁ COOH 64 Linolenic acid c ₁₇ H ₂₉ COOH one hundred

Preferably, the oxidation is carried out under controlled conditions to prevent as much as possible self-oxidation after the oxidation process. Preferably, the oxidized lipids have a peroxide number, as measured by official AOCS method Cd 8-53, of at least 20, more preferably at least 30, and even more preferably at least 40 meq / kg.

The lipids can be oxidized by any suitable method and any suitable oxidizing agent, for example, ozone, ozone / air or ozone / oxygen mixtures.

During the oxidation process, a series of peroxides can form, such as hydroperoxides, ozonides, diperoxides, peroxides and polyperoxides. Certain by-products may also form, for example, ketones and aldehydes, which are less desirable. These by-products can be removed by washing the lipids with a solvent after the oxidation process. Alternatively, undesired volatiles can be removed by evaporation, for example, in vacuum.

In accordance with the invention, it was shown that fibers treated with oxidized lipids, especially ozonated triglycerides, have a pronounced ability to reduce the release of undesirable odorous compounds, which are often found in the urogenital area of the body in persons using absorbent pads. Examples of such odorous compounds are dimethyl sulfide (DMS), dimethyl disulfide (DMDS) and isovalerian aldehyde (IVA).

The amount of oxidized lipids added may vary depending on the intended use. For example, with regard to personal hygiene, an increased amount of oxidized lipids can be used in the urogenital area, where the advantage is lipid retention on the skin, while when rubbing hands, it is desirable that only a small amount of lipids remain on the skin.

The wet wipe may contain from 0.01 to 15 g / g, preferably from 0.1 to 8 g / g, more preferably from 0.2 to 4 g / g and, most preferably, from 0.3 to 3 g / g of added oxidized lipids based on the total weight of the wipes. The amount may vary depending on the intended purpose.

When using wet wipes, it is preferable that the composition containing the oxidized lipids is transferred and delivered to the skin, that is, it serves as a skin treatment agent, especially to suppress odor and / or suppress bacteria.

Oxidized lipids can be evenly distributed throughout the tissue. Alternatively, oxidized lipids can be concentrated in some areas of the tissue, especially on its surface, so that they can easily separate from the tissue and transferred to the skin.

The wiping composition of the present invention, in addition to oxidized lipids, may contain one or more of the following components: a viscosity adjusting agent, an oxidized lipid carrier, or an agent that improves the adherence of the composition to the skin. Examples of viscosity adjusting agents include polyethylene glycol (PEG) and glycerin. As agents that improve adhesion to the skin, you can use Quaternary tensides (surfactants). Other components that may be included in the composition are cleaning agents, skin care products, antibacterial agents, fragrances, etc.

The presence of oxidized lipids in wipes can also inhibit the growth / activity of bacteria, which in turn produce substances that can increase the bad smell. Suppression of the growth / activity of unwanted bacteria is also important for hygienic reasons, both in relation to the urogenital area, and to wipe the hands. Frequent hand rubbing is needed, for example, in restaurants, kitchens, medical care facilities, schools, kindergartens, industrial plants, workshops, etc. In addition to the effects associated with odor suppression and bacteria suppression, oxidized lipids can also serve as a skin care product.

Other odor suppressing agents, such as chitosan, starch-based odor control substances and esters, can also be added to the napkin. The esters can be selected from cyclic esters or from isomethyl acetate, isomethyl propionate, isomethyl isobutyrate, isomethyl crotonate and isomethyl butyrate.

Lipids can be oxidized either before addition or after addition to the fibers. At the same time, ozone can act as a cellulose bleach if cellulose fibers are present in the tissue.

The base material used in the tissue should be selected so that it can hold the oxidized lipids in its porous structure and release them to the skin when using the tissue. It is also preferred that it can absorb substances that are removed from the skin by wiping. Examples of suitable base materials are fibrous materials such as cosmetic paper, dry-formed fabrics, and various types of non-woven materials. Examples of non-woven materials are canvases with a hydraulic interweaving of fibers, spunbond, a canvas obtained by the aerodynamic method from a melt, a material made of short polymer fibers by combing and subsequent bonding with heated rollers, etc. Other examples of base materials are foam materials, nets, films, etc. In the case of using films, oxidized lipids can be applied between the layers of the film and opened when the layers of the film are separated from each other and / or introduced into the depressions formed in the film.

The structure of the base material is important for its function associated with the retention of liquid substances. A material that is particularly suitable in this regard is a canvas with hydraulic weaving of fibers.

Fibers that are useful for use in fibrous base materials are cellulose fibers, cotton fibers, bamboo fibers and other natural fibers, artificial cellulose fibers such as rayon, lyocell, polyolefin fibers such as polyethylene, polypropylene, polyester and mixtures thereof.

A suitable fiber composition for a so-called wet wipe may be a mixture of viscose and polyester fibers, for example, 70% by weight viscose and 30% by weight polyester.

A typical fibrous composition for another type of tissue is a mixture of cellulose fibers and polypropylene.

Suitable weights for personal care wipes are from 30 to 70 g / m ² , preferably from 40 to 50 g / m ² .

The size of the wipes may vary depending on the intended purpose and the degree of contamination of the surface being cleaned. Examples of suitable sizes of wipes: 10 × 15 cm, 12 × 20 cm and 16 × 18 cm.

A composition comprising oxidized lipids can be applied to the base material by spraying, priming, and impregnating.

EXAMPLES

Oil / Fat Ozonation

Experiment 1

Ozone was produced in an Argenotox type GL ozone generator, Hamburg, operating at a voltage of 150 V with an input oxygen flow of 63 l / h. 200 g of each test oil / fat was treated for 2 hours with an ozone / oxygen flow of 0.061 g / min. The ozone concentration in the added gas was 58 g / m ³ .

In accordance with Table 8, for a more highly ozonized sunflower oil having a peroxide value of 276.9 meq / kg, ozone was bubbled through 50 g of oil for 5.5 hours.

Gas was bubbled through oil in a ventilated vessel. A magnetic stirrer was used in this vessel. Solid fats were carefully heated slightly above the melting point, after which gas was bubbled through liquid fats. The tested oils / fats are listed below in table 3.

Table 3 Saturated
(%) Monounsaturated
(%) Polyunsaturated
(%) Unsaturated /
saturated Sunflower oil eleven 28 56 7.64 Olive oil eighteen 70 12 4,56 Rapeseed oil 7 62 31 13.29 Corn oil 12 28 55 6.92 Cacao butter 61 36 3 0.64

The oxidation state was checked by determining the peroxide number in accordance with the official testing method AOCS 8-53 Surplus 2003. The peroxide number was determined for both the starting oils / fats and ozonized oils / fats. The results are presented below in table 4.

Table 4 Oil Peroxide value (meq / kg) Rapeseed oil 3.82 Ozonized rapeseed oil 42.09 Corn oil 4.21 Ozonated Corn Oil 60.04 Olive oil 7.99 Ozonated Olive Oil 61.41 Sunflower oil 7.10 Ozonated Sunflower Oil 65.49 Cacao butter 3.32 Ozonated Cocoa Butter 69.51

Oils / Fats Cellulose Treatment

Sulphate pulp sheets from Weyerhaeuser Inc. with the designation NB416 was impregnated with a solution of the test oil / fat in hexane. A solution of 4.29 g of oil in 4.29 g of hexane was added to a 10 g pulp sheet. The solution was evenly distributed over the surface of the leaves. After evaporation of hexane, the sheets contained 30% by weight of oil / fat and 70% by weight of cellulose fibers. The processed sheets were pulped in a Braun MX32 multimixer (universal mixer) to produce fluff pulp.

Odor Reduction Analysis

1 g of treated cellulose was placed in a 60 ml vial, after which 3.9 ml of 0.01M phosphate buffered saline pH 7.4 manufactured by Sigma was added thereto. Then 0.1 ml of PEG300 with DMS (dimethyl sulfide), DMDS (dimethyldisulfide) and IVA (isovalerian aldehyde) was added so that the concentration of each odorous substance in the final solution was 1000 ng / ml.

After 3 hours at 35 ° C, SPME fiber (Supelco) was injected into the free space above the cellulose, PDMS 75 μm carboxene was injected, and after another 0.5 hours, the SPME fiber was analyzed by gas chromatography (GC) on a Thermo Finnigan Trace instrument with a detector MS. The peak area of each odorous substance was determined for samples with treated cellulose and untreated reference cellulose. The following settings were used for the GC:

Temperature program for GC: 30 ° C (7 minutes), 3 ° C / min - 70 ° C (0 minutes), 40 ° C / min - 250 ° C (7 minutes)

Column: ZB-624 (Zebron), 30m, inner diameter 0.25 mm, film thickness 1.40 μm

Inlet temperature: 250 ° C

Transmission Line: 220 ° C

Mode: no split flow

MS: SIM (single ion monitoring). When analyzing DMS, IVA, and DMDS, the following mass numbers were determined: 45, 46, 47, 57, 58, 61, 62, 79, 86, and 94.

Odor Reduction Results

Tests have shown that ozonized oils / fats showed a significantly more pronounced restrictive effect on odorous substances compared to corresponding oils / fats that were not ozonized. Odor reduction results are presented below in Table 5. Odor reduction was determined by comparing the peak area of the test sample with that peak area obtained from the analysis of untreated reference cellulose. The calculation of odor reduction in percent was carried out according to the equation:

Odor reduction = 100 × (1-actual peak area / peak area for untreated pulp sample) [1]

Table 5 % Odor reduction Dms IVA DMDS Sunflower oil 0 0 31.6 Ozonated Sunflower Oil 99.9 96.7 99.1 Cacao butter 35.1 0 48,2 Ozonated Cocoa Butter 79.8 50,0 59.1 Rapeseed oil 35.8 38.5 36.5 Ozonized rapeseed oil 99,4 96.2 91.2 Corn oil 87.1 66.0 88.4 Ozonated Corn Oil 99.9 96.4 99.6 Olive oil 84.0 69.2 73.0 Ozonated Olive Oil 99.9 97.7 95.9

Ozonation of other lipids

Experiment 2

Ethyl oleate

100 g of technical grade ethyl oleate obtained from Alrich were treated for 6 hours with ozone generated by Argentox ozone generator, type GL, Hamburg, operating at a voltage of 150 V with an oxygen flow at the inlet of 63 l / h. The addition of ozone was carried out at the level of 0.061 g / min, and the concentration of ozone in the added gas was 58 g / m ³ . After ozonation, the peroxide number measured by the official AOCS Cd 8-53 method was 237.4 meq / kg.

Oleic acid

100 g of technical grade oleic acid obtained from Fluka for 5 hours was treated with ozone generated by Argentox ozone generator, type GL, Hamburg, operating at a voltage of 150 V with an oxygen flow at the inlet of 63 l / h. The addition of ozone was carried out at the level of 0.051 g / min, and the concentration of ozone in the added gas was 58 g / m ³ . After ozonation, the peroxide number measured by the official AOCS Cd 8-53 method was 375.3 meq / kg.

Jojoba oil

100 g of jojoba oil, manufactured by Simmondsia Chinensis and delivered by Fluka, were treated for 5 hours with ozone generated by an Argentox ozone generator, type GL, Hamburg, operating at a voltage of 150 V with an oxygen flow inlet of 63 l / h. The addition of ozone was carried out at the level of 0.061 g / min, and the concentration of ozone in the added gas was 58 g / m ³ . After ozonation, the peroxide number measured by the official AOCS Cd 8-53 method was 178.5 meq / kg.

Azolectin

50 g of soybean azolectin powder obtained from Fluka was suspended in 150 g of distilled water. Azolectin is a mixture of different phospholipids. The suspension was treated for 2 hours with ozone generated by an Argentox ozone generator, type GL, Hamburg, operating at a voltage of 150 V with an oxygen flow at the inlet of 63 l / h. The addition of ozone was carried out at the level of 0.051 g / min, and the concentration of ozone in the added gas was 58 g / m ³ . After ozonation, the material was cooled to approximately −20 ° C. in a TEF370 type Tefcold freezer, and then freeze-dried in an Edwards Modulyo vacuum drying machine. After freeze-drying, dry ozonized azolectin powder was collected and its peroxide number was measured by the official AOCS Cd 8-53 method, resulting in a value of 382.2 meq / kg.

These ozonated lipids were tested for their ability to reduce odor in the same way as in experiment 1 described above. The only exception to the laboratory procedure was the method of treating cellulose with azolectin. In this case, the lipid was added in the form of a dried powder to the already fluffy cellulose. The following results were obtained.

Table 6 % Odor reduction Dms IVA DMDS Ethyl oleate 0 0 0 Ozonated Ethyl Oleate 98 48.6 53,2 Oleic acid 67.5 9.3 19.2 Ozonated Oleic Acid 99,4 98.6 one hundred Jojoba oil 27.9 25.5 24.1 Ozonized Jojoba Oil 99.9 80.5 75.9 Azolectin 16 16 8 Ozonated Azolectin one hundred 98.9 84.6

Tests with different amounts of added oils having different peroxide numbers

The tests were carried out with treated cellulose, to which a different amount of ozonized sunflower oil was added: 0, 3, 10 and 30% by weight, respectively. Two differently ozonated sunflower oils were used: one having a peroxide number of 65.6 meq / kg and the other with a peroxide number of 276.9 meq / kg.

Cellulose was treated as follows.

A Weyerhaeuser trademarked NB416 bleached kraft pulp sheet was treated with oil dissolved in a suitable evaporated solvent. The solution was poured onto 10 g of sheet material, which absorbed liquid and distributed oil well over a network of fibers. Then the solvent was evaporated by simply keeping the leaves at room temperature for at least 3 hours. The following solutions were prepared:

a. 0.31 g of ozonated sunflower oil with a peroxide number of 65.5 dissolved in 8.27 g of hexane. Such an additive means that the cellulose sheet will contain 3% oil. b. 1.121 g of ozonated sunflower oil with a peroxide value of 65.5 dissolved in 7.47 g of hexane. Such an additive means that a pulp sheet will contain 10% oil. c. 4.29 g of ozonated sunflower oil with a peroxide number of 65.5 dissolved in 4.29 g of hexane. Such an additive means that a sheet of cellulose will contain 30% oil. d. 0.31 g of ozonated sunflower oil with a peroxide number of 276.9 dissolved in 8.27 g of acetone. Such an additive means that the cellulose sheet will contain 3% oil. e. 1.11 g of ozonated sunflower oil with a peroxide number of 276.9 dissolved in 7.47 g of acetone. Such an additive means that a pulp sheet will contain 10% oil. f. 4.29 g of ozonated sunflower oil with a peroxide number of 276.9 dissolved in 4.29 g of acetone. Such an additive means that a sheet of cellulose will contain 30% oil.

After evaporation of the solvent, the oil-soaked sheets were torn into pieces and pulped in a Braun MX32 multimixer. Fiber dissolution was carried out with maximum intensity until a uniform fluffy cellulose was formed.

For comparison, the sheets of untreated bleached kraft pulp (NB416) were divided into fibers in the same way.

Chemicals used Sunflower oil Food Grade Oil Delivered from a Local Food Store (COOP) Hexane For analyzes, manufactured by Merck Acetone Puriss varieties obtained from Fluka

Testing was carried out in the same manner as described above. The results of these tests are presented below in tables 7 and 8.

Table 7 Reduction of odorous substances in% with the addition of ozonated sunflower oil with a peroxide value of 65.5 meq / kg Adding ozonated sunflower oil (% by weight) Dms DMDS IVA 0 0 0 0 3 50,4 21.7 0 10 95.8 73.3 73.3 thirty 98.7 93.5 86.7

Table 8 Reduction of odorous substances in% with the addition of ozonated sunflower oil with a peroxide number of 276.9 meq / kg Adding ozonated sunflower oil (% by weight) Dms DMDS IVA 0 0 0 0 3 94.6 55.6 92.8 10 100.0 95.2 92.9 thirty 100.0 100.0 96.0

These results show that adding as little ozonated sunflower oil as 3% by weight can give a strong reduction in added odorous substances, and a high peroxide number oil provides a more significant reduction in odor. It may be mentioned that ozonated sunflower oils having a peroxide value above 1000 meq / kg are described in the literature.

Therefore, it can be assumed that the addition of less than 3 weight% oil with a high peroxide number may provide a quite acceptable odor control.

Practical smell test

A practical sensory odor test was also conducted, which consisted in the fact that the testers sniffed the samples participating in the above measurements after conducting GC tests. The testers opened the bottles and sniffed cellulose samples with added odorous substances. The following results were obtained:

Sample Smell Reference: Raw Pulp Very strong foul odor 3% ozonated sunflower oil, peroxide value 65.5 Clear odor weakened compared to the standard 10% ozonated sunflower oil, peroxide value 65.5 Faint smell 30% ozonated sunflower oil, peroxide value 65.5 There is no unpleasant odor 3% ozonated sunflower oil, peroxide value 276.9 Faint smell 10% ozonated sunflower oil, peroxide value 276.9 There is no unpleasant odor 30% ozonated sunflower oil, peroxide value 276.9 There is no unpleasant odor

Lipid Wipes Treatment

In this experiment, a non-woven spunlace material (weaving fibers with high-pressure water jets) under the trade name Fibrella 7160, obtained from Suominen (Finland), was used. This material, consisting of approximately 60% polypropylene fiber and 40% viscose fiber, has a base weight of approximately 50 g / m ² . A non-woven spunlace sheet was cut into pieces weighing 1 g and an area of 0.020 m ² . Then these pieces were treated with lipids. 2 g of lipid was dissolved in 4 g of hexane or acetone and evenly distributed over a piece of non-woven material. Acetone was used to dissolve all ozonized oils and oleic acid, while other (non-ozonized) oils were dissolved in hexane. After a few hours, when the solvent evaporated, the pieces of nonwoven material were folded and transferred to 60 ml vials used for SPME analysis. Then the vials were filled with gaseous nitrogen and hermetically closed. The lipids used to process the wipes are listed in table 9.

Table 9 Lipids used to process wipes Lipid Peroxide value (meq / kg) Sunflower oil 7.1 Ozonated Sunflower Oil 276.9 Corn oil 4.2 Ozonated Corn Oil 60.0 Olive oil 8.0 Ozonated Olive Oil 61,4 Oleic acid 3,1 Ozonated Oleic Acid 375.3

Odor odor reduction analysis

60 ml vials containing 1 g spunlace nonwoven fabric with 2 g lipid were used in these tests. Laboratory procedures were fully consistent with those described above when evaluating odor reduction in fluff pulp (see the corresponding section). 3.9 ml of phosphate buffered saline (pH 7.4) and 0.1 ml of PEG300 with DMS, DMDS and IVA were added to each vial. The total concentration of each odorous compound was 1000 ng / ml.

Table 10 % Odor reduction Dms IVA DMDS Sunflower oil 66,4 79.1 89.8 Ozonated Sunflower Oil 99,99 95.5 99.97 Corn oil 87.3 92.1 97.0 Ozonated Corn Oil one hundred 99.3 99.1 Oleic acid 67.4 74.5 83.6 Ozonated Oleic Acid one hundred one hundred one hundred Olive oil 69.5 91.1 94.5 Ozonated Olive Oil 99.5 96.3 96.3

Bacterial Growth Measurements

To measure bacterial growth, test fluid 1 was used: sterile synthetic urine, to which a culture medium was added for growing microorganisms. Synthetic urine contained monovalent and divalent cations and anions, as well as urea; it was generated in accordance with the information provided in the link Geigy, Scientific Tables, vol. 2, 8th ed., 1981, page 53. The culture medium for growing microorganisms was based on two common culture media: Hook and FSA for enterobacteria. The pH of this mixture was 6.6.

A homogeneous mixture of fluff pulp was prepared as follows (method 1).

Untreated and treated Weyerhauser pulp (NB416) was weighed in the desired proportions and placed in a Braun MX32 multimixer. The pulp was mixed for approximately 30 seconds.

Absorbent pads for testing were made as follows (method 2): absorbent pads were made using a slightly modified model sample in accordance with SCAN C 33:80. Fluff pulp of the desired type (s) was weighed, and a homogeneous fluff pulp mixture was introduced into the air stream at a negative pressure of approximately 75 mbar through a 10 mm diameter tube equipped with a metal mesh bottom. Fluff pulp was collected on a metal mesh, after which an absorbent sample was made. The absorbent pad was compressed to a volume in the range of 6 to 12 cm ³ / g.

Two different absorbent pads were produced: a reference pad consisting of 2.0 g of untreated Weyerhauser cellulose (NB 416), and a test pad consisting of a mixture of 1.4 g of treated Weyerhauser cellulose (NB 416) that was treated with oxidized sunflower oil ( the peroxide value of 65.5 meq / kg) in accordance with the method described above in the section "Processing of cellulose with oils / fats" (the added amount was 30% oil by weight), and 1.0 g of untreated cellulose Weyerhauser (NB 416). The size of the absorbent pads was 5 cm in diameter.

Bacterial growth in absorbent pads was measured as follows (method 3):

10 ml of the test fluid 1 containing bacteria was added to the test pad placed in a sterile jar (Nunc cans for sputum / organs, 100 ml), and the jar was closed with a lid. The can was turned upside down and incubated in a warm cabinet at 35 ° C. After incubation for 0, 6, and 12 hours, the test pads were placed in a plastic bag with peptone water, and the contents were homogenized (shaken and mixed) in a homogenizer for 3 minutes. The homogenate was diluted with peptone water in dilution tubes, and the microbiological culture was distributed on agar plates. Slanetz Bartley agar was used for E. faecalis, and Drigalski agar was used for E. coli and P. mirabilis. Before counting the colonies, the samples were incubated at 35 ° C for 1-2 days, and then the logarithmic value of CFU / ml was calculated (CFU = counted number of colony forming units). Control tests with reference gaskets were also performed.

Test Results: Bacterial Growth

Bacteria were cultured in nutrient broth and diluted in test fluid 1 (method 3) to the desired concentration, which had a logarithmic value of 3.3. Test absorbent pads were produced according to method 2. Bacterial growth was measured according to method 3.

The result is shown in Table 11, which clearly illustrates that the growth of all 3 control bacteria was significantly lower in the test pads compared to the reference pads after 6 and 12 hours of incubation. The table shows the logarithmic values of CFU / ml at different time intervals. A test sample means a mass containing ozonated sunflower oil, and a reference sample means an untreated mass.

Table 11

0 hours 6 o'clock 12 hours pH Sample E.coli P.mir. E.faec. E.coli P.mir. E.faec. E.coli P.mir. E.faec. 0 hours 6 o'clock 12 hours Subject 1 3,5 3.2 3.2 <2 <2 <2 <2 <2 <2 6.2 5.9 5,6 Subject 2 3.4 3.2 3.3 <2 <2 <2 <2 <2 <2 6.3 5.9 5,6 Subject mv 3,5 3.2 3.3 <2 <2 <2 <2 <2 <2 6.2 5.9 5,6 Reference 1 3,5 3.2 3.2 6.1 5,0 6.3 9.7 8.8 9.1 6.6 6.6 8.9 Reference 2 3.4 3.2 3.3 6.5 5.1 6.2 8.8 7.8 8.1 6.6 6.6 8.6 Reference mv 3,5 3.2 3.3 6.3 5,0 6.3 9.5 8.5 8.8 6.6 6.6 8.7

Candida albicans growth measurements

To test the effect on growth of Candida albicans, tests were performed corresponding to those described above. For growth measurements, test fluid 1 was prepared as described above. Fluff pulp was prepared according to method 1, and absorbent pads were prepared according to method 2. However, in this case, the oxidized oil was a sunflower oil with a peroxide number of 276.9 mmol / kg in accordance with the method described in the section "Processing of cellulose with oils / fats" for with the exception that instead of hexane, acetone was used to dissolve the ozonated sunflower oil.

C. albicans was cultured in Todd Hewitt broth to a stationary phase and diluted in test fluid 1 to a desired concentration of approximately 104 CFU / ml.

10 ml of test fluid 1 containing C. albicans was added to the test pad and the corresponding reference pad, which were placed in sterile plastic cans, covering these cans with aluminum foil. Banks were incubated in a warm cabinet at 37ºC. After incubation for 0, 4, 6, and 8 hours, test and reference pads were placed in plastic bags with 20 ml of physiological saline, and the contents were homogenized (shaken and mixed) in a homogenizer for 3 minutes (at high speed). The homogenate was diluted with physiological saline in dilution tubes, and the culture suspension was distributed on Sabaroud dextrose agar plates. Before counting the colonies, the plates were incubated for 2 days at 37 ° C, and then the CFU / ml logarithmic value was calculated.

The results shown below in table 12 are average values for the two test samples. The table shows the logarithmic values of CFU / ml at different time intervals. A test sample means a mass containing ozonated sunflower oil, and a reference sample means an untreated mass.

Table 12 Candida albicans Sample 0 hours 4 hours 6 o'clock 8 ocloc'k Reference 4.83 5.60 6.06 6.64 Test subject 4.41 0 0 0

As can be seen from the table, C. growth was strongly suppressed in the test pads and after 4 hours was zero.

Napkin examples

Example 1

Urogenital care wipes

100 g of olive oil (extra virgin varieties, COOP) were ozonated in accordance with experiment 1 to a peroxide value of 61.41 meq / kg. Ozonated olive oil was washed by extraction with ethanol. The extraction was carried out by mixing 100 g of ozonated olive oil and 160 g of ethanol in a beaker with vigorous agitation. The mixture was then centrifuged to obtain two separate phases. The ethanol phase was removed and the ozonated olive oil was extracted an additional 4 times in accordance with the same procedure. The total amount of ethanol was 5 × 160 g = 800 g. At the end of the last extraction, ozonated olive oil was treated at 60 ° C in a rotary evaporator for 3 hours to remove traces of ethanol.

On a piece of fabric (Fibrella 7160, 60% polypropylene / 40% viscose, 50 g / m ² manufactured by Suominen) 16 × 18 cm in size, ozonized and extracted olive oil was sprayed to a final concentration of 1.5 g / g dry tissue.

Example 2

Hand Wipes

50 g of sunflower oil (COOP) were ozonated in accordance with experiment 1 to a peroxide value of 276.9 meq / kg. Ozonated sunflower oil was washed by extraction with ethanol. The extraction was carried out by mixing 50 g of ozonated sunflower oil and 80 g of ethanol in a beaker with vigorous agitation. The mixture was then centrifuged to obtain two separate phases. The ethanol phase was removed and the ozonated sunflower oil was further extracted 4 times in accordance with the same procedure. The total amount of ethanol was 5 × 80 g = 400 g. At the end of the last extraction, ozonated sunflower oil was treated at 60 ° C in a rotary evaporator for 3 hours to remove traces of ethanol.

An ozonized and extracted sunflower oil was sprayed onto a piece of tissue (SCA - Tork Premium 520 universal tissue, 70 g / m ² ) 24 × 24 cm in size to a final concentration of 3 g / g dry tissue.

Claims (10)

1. A napkin comprising a base material onto which a composition corresponding to one or more of the following purposes has been added: cleaning, skin care, odor suppression, antibacterial effect, etc., characterized in that said composition includes at least , one oxidized lipid having a peroxide number as measured by the official AOCS method Cd 8-53 equal to at least 20 meq / kg. 2. Napkin according to claim 2, characterized in that the oxidized lipids have a peroxide number when measured by official method AOCS Cd 8-53, equal to at least 30 and more preferably at least 40 meq / kg 3. The napkin according to claim 1 or 2, characterized in that at least 0.01 g / g of oxidized lipids, based on the total weight of the napkin, was added to the napkin. 4. A napkin according to claim 3, characterized in that from 0.01 to 15 g / g, preferably from 0.1 to 8 g / g, more preferably from 0.2 to 4 g / g, is added to said napkin; most preferably 0.3 to 3 g / g, oxidized lipids based on the total weight of the wipe. 5. Napkin according to claim 1, characterized in that the lipids are fatty acids or their derivatives. 6. Napkin according to claim 5, characterized in that the derivatives of fatty acids are esters of fatty acids, especially triglycerides. 7. Napkin according to claim 5 or 6, characterized in that at least a portion of the fatty acids and / or derivatives of fatty acids is unsaturated. 8. Napkin according to claim 1, characterized in that said oxidized lipids are oxidized by treatment with ozone. 9. Napkin according to claim 1, characterized in that the base material is selected from: knitted fabric, spongy, mesh or film material. 10. The napkin according to claim 1, characterized in that the napkin is a napkin for personal hygiene, such as a napkin for baby care, for feminine hygiene, for incontinence care, for hand care, for foot care, etc. .