JP2002522562A - Stacked wet wipes with anti-evaporation layer - Google Patents

Abstract

The present invention is directed to wet wipes for use on wiping surfaces in the home and industry, in addition to use on the human body, such as for baby wipes, makeup removers, and other skin care applications. Regarding (1). The wetting wipe (1) comprises an improved stack shape, which comprises at least one anti-evaporation layer in the stack to reduce the evaporation of volatile components of the lotion formulation from the stack, especially once the package has been opened. (24) insertion.

Description

DETAILED DESCRIPTION OF THE INVENTION

FIELD OF THE INVENTION The present invention relates to an improved stack (e.g., with reduced evaporation of volatile components of a liquid formulation).
Stack) with a stack of wet wipes having a shape.

BACKGROUND OF THE INVENTION Wet wipes are typically pre-wetted, disposable tourettes that can be used in a variety of applications, both domestic and industrial, and perform a variety of functions.
Wet wipes are typically used to wipe both living and inanimate surfaces and may provide a number of benefits, such as cleaning, cleansing, sterilization, and skin care benefits.

[0003] One particular application is the use as a wet wipe for blowing parts of the human body, especially when cleaning water is not available, such as when traveling. Wipes are commonly used for human cleansing and cleansing of the anus, perianal cleansing and genital cleansing and face and hand cleansing, for example as hygiene wipes that touch the skin directly, such as women's wet wipes. Used for wiping. Wet wipes can also be used for application of substances to the body, including makeup, skin conditioners, and removal and application of medications.
Another application of wipes is made during diaper change, and also for the treatment of adult and infant dermatitis caused in part by the use of diapers and incontinence devices. In addition, wet wipes can also be applied for wiping and / or cleaning other surfaces, or as, for example, kitchen and bathroom surfaces, glasses, shoes and, for example, machine or car surfaces. It is also applicable for applying the composition to surfaces such as surfaces that require industrial cleaning. Wet wipes also include products used for cleaning or caring for pets.

[0004] Wet wipes are usually constructed from a combination of synthetic and natural fibers, such as polyolefin fibers, viscose fibers and cotton fibers, which generally include, inter alia, surfactants, preservatives, oils, and Wet with an aqueous composition containing fragrances (smell ingredients). The wet wipes are then typically provided in a stacked configuration folded into a covered container, such as a container with a lid. Alternatively, the wipe may be provided in a tub having a dispensing opening. In both cases, this allows for easy transport and storage of the wipe. Typically, the wipes are packaged in plastic foil to protect the wet wipes before use.

A current problem with all types of wet wipes on the market is that the storage of a stack of wipes tends to cause the lotion contained therein to migrate toward the bottom of the stack. It is. This results in a stack with an uneven distribution of lotion for individual wipes, with the upper wipe often being too dry, while the lower wipe becomes oversaturated with the lotion . A proposed solution to lotion migration is described in U.S. Pat. No. 4,778,048, which discloses a wet wipe that is tilted about its end in a container for improved access, distribution and equal liquid distribution. Disclose a product that includes a stack.

[0006] Another solution is proposed in CA2142385, which discloses a wet wetting wipe that reduces migration of downward liquid throughout the stack achieved by inserting a moisture barrier into the stack of wipes. Discloses a stack. Alternatively, U.S. Pat. Nos. 4,775,582 and EP 256,950 describe
The use of meltblown fibers with some pore volume as a substrate material for wipes to prevent lotion deflection of the entire stack is described.

[0007] However, another problem with liquid distribution throughout the stack of wipes is:
It relates to the chemical and physical properties of the lotion component itself. Typically, lotions contain at least one component that readily volatilizes under normal room temperature and pressure conditions. Once the packaging of the wet wipe, such as a dispensing box or fluid wrap, is opened and unsealed, the volatile components of the lotion can easily evaporate, thereby reducing the total volume present in the stack of wipes. Lotion is reduced. In addition, once the package is opened, the problem of non-uniform distribution of lotion across the stack of wipes is further exacerbated. Obviously, the lotion on the top of the stack will evaporate more easily than the lotion from the bottom of the stack, and thus the top wipe will dry. In addition, certain components of lotions will evaporate more easily than others. As a result, the composition of the lotion does not remain constant when the package is opened, so that the performance of the lotion cannot be guaranteed. For example, wipes that are intended to provide sterilization and antimicrobial benefits due to the presence of certain volatile components in the lotion require only optimal performance in use due to the lack of a minimum percentage of components from the lotion due to evaporation. Will not be able to provide.

[0008] This problem is exacerbated by certain distribution methods. For example, a method that results in continuous disposable through the container opening such that a quantity of the next wipe is exposed through the dispensing opening will promote lotion evaporation and drying of the top wipe layer.

Yet another problem associated with the evaporation of volatile components of a lotion relates to the resulting changes in the intensity and odor characteristics of the lotion due to the evaporation process. In fact, depending on the state of the components and the degree of volatility, the odor of the product can change significantly. Such a change in the odor of the lotion is, of course, completely unacceptable to the consumer.
In fact, especially if the product is to be utilized in sensitive or sensitive parts of the body, despite the presence of, for example, the improved cleaning performance benefits provided by the product, consumers will They have a generally strong sensitivity to the odor of such products.

[0010] It is therefore desirable to provide a wet wipe stack shape that is strong, flexible and absorbent and is suitable for many applications such as baby wipes that provide better cleanability. Furthermore, it is desirable to provide a wet wipe with low loss of volatile components of the lotion due to evaporation, especially once the package has been opened.

The present invention addresses these problems by providing a stack of wet wipes having an inert hydrophobic layer, preferably liquid impermeable, inserted between the wipes throughout the stack. In this manner, evaporation of volatile lotion components can be significantly reduced.

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a wet wipe for wiping parts of a human body and other inanimate surfaces, such as a baby wipe. In particular, the present invention relates to a stack of wet wipes, each of said wipes comprising a substrate and a liquid composition, said liquid composition comprising at least one volatile component as defined herein, wherein said stack comprises Further, it is characterized by including at least one evaporation preventing layer for preventing the evaporation of the volatile component.

DETAILED DESCRIPTION OF THE INVENTION According to the present invention, a wet wipe comprises a substrate that has been coated or impregnated with a liquid composition. The substrate is a woven or non-woven fabric, a foam, a sponge, a batting, a ball, a puff or a film, most preferably a non-woven fabric, and may be composed of natural or synthetic fibers or mixtures thereof. Preferably, the fiber composition comprises a hydrophilic fiber material such as viscose, cotton, or flax and polyethylene terephthalate (PET) in a ratio of 10 to 90% by weight hydrophilic material to 90 to 10% by weight hydrophobic material. ) Or a hydrophobic fiber material such as polypropylene (PP). A particularly preferred composition is 50% viscose, 50% P
P and 50% viscose, 50% PET, and 70% cellulose, 15%
PET and 15% latex. The substrate is preferably at least 20 g
m ⁻² preferably has a basis weight of less than 150 gm ⁻² , most preferably a basis weight of 2
0Gm ^-2 from 100 gm ^-2, more preferably from 50gm ^-2 to range 95gm ^-2. The substrate can have any thickness. Typically, the substrate is airl (air l)
aying) process, the average thickness of the substrate is less than 1.0 mm. More preferably, the average thickness of the substrate is between 0.1 mm and 0.9 mm. The thickness of the substrate is determined by the standard EDANA nonwoven fabric industry methodology, reference method # 30.4
Measured according to -89.

[0014] In addition to the fibers used to make the substrate, the substrate may have other components or materials in addition to those known in the art. The type of additive desired will depend on the particular end use of the envisioned substrate. For wet wipe products such as, for example, toilet paper, paper towels, facial tissues, baby wipes and other similar airborne products that have moisture, strong wet strength is a desirable attribute. Therefore, especially for cellulosic substrates,
It is often desirable to add chemicals known in the art as wet strength resins. A general discussion of the types of wet strength resins utilized in papermaking technology can be found in the TAPPI monograph series no. 29, "Wet Strength of Paper and Paper Board", can be found in the Pulp and Paper Industry Technical Association (New York, 1965). Particularly preferred resins are polyamide-epichlorohydrin, polyacrylamide, styrene-butadiene latex, dialdehyde starch and mixtures thereof. In addition to wet strength additives, it may also be desirable to include certain dry strength and lint control additives known in the art, such as starch binders. In addition, the substrate may also include reagents for improving the optical properties of the substrate material, such as, for example, an opacifier such as titanium dioxide.

According to the present invention, the substrate can be manufactured by any method known in the art. For example, nonwoven substrates can be manufactured by dry manufacturing techniques, such as air lay or wet laying, as on a paper machine. Other nonwoven manufacturing techniques such as melt blowing, spin bonding, needle punching and spunlacing can also be used. The preferred method is airlay.

According to the present invention, the wipes are provided in a stacked configuration that can include any number of wipes. Typically, a stack includes 3 to 150, more preferably 5 to 100, and most preferably 10 to 60 wipes. further,
The wipe may be provided in any shape that is folded over the unfolded one. Most preferably, the wipes are stacked in a folded configuration.

Referring to FIGS. 1-4, FIG. 1 is an illustration of a cross-section of a stack of folded wipes 23 in a container 20. Container 20 includes a tab portion 21 and a lid 22 that is rotatably coupled to the tab portion by, for example, a hinge mechanism. Alternatively, the wipes can be stacked and then packaged in a moisture impermeable wrapper such as foil or a polymer film wrapper to provide a refill package for use in refilling the contents of the container.

Each folded wipe 1 extends longitudinally in the machine direction from a first leading end edge 2 to a second trailing end edge 3. The folded web also has side edges 4 and 5 that extend longitudinally from a first leading end edge 2 to a second trailing end edge 3. Each folded wipe 1 may include a first panel fold 6 that is generally parallel to the leading edge 2 and generally perpendicular to the side edges 4,5. The first panel fold 6 is longitudinally spaced from the leading edge 2 to provide a leading edge panel 9 extending between the first panel fold 6 and the leading edge 2. As used herein, a panel is a portion of a wipe that extends between two folds, or folds and edge ends.

The folded wipe may also include a second panel fold 7, and a first central panel 8, and a trailing edge panel 10. The second panel fold 7 is generally parallel to and spaced longitudinally from the first panel fold 6. The first central panel 8 is connected to the leading edge panel 9 at the first panel fold 6 and extends between the first panel fold 6 and the second panel fold 7.

The trailing edge panel 10 couples to the first central panel 8 at a second panel fold 7. The trailing edge panel 10 extends between the second panel fold 7 and the trailing end edge 3. The wipes are first and second to provide a leading edge panel 9, a first central panel 8, and a trailing edge panel 10 in a Z-shaped folded configuration, as can be seen very clearly in FIG. It is folded in panel folds 6 and 7. In the z-folded configuration, panel 9 is adjacent to and overlies a portion of panel 8 and panel 10 is adjacent and underlies a portion of panel 8. However, other folding shapes, such as a C-fold or J-fold shape with more or less panels are equally applicable. A preferred folded configuration is shown in FIG. 3 which includes a second central panel 11 provided by a third panel fold 12.

[0021] Further, in addition to the panels described herein above, the wipe may also have additional panels. In particular, the leading edge panel and / or the trailing edge panel may also be provided with additional folds to provide a leading edge panel lip 36 or a trailing edge panel lip as seen in FIG. Such a lip may be adjacent to the leading or trailing edge of the folded substrate to provide a lip that extends between the fold and the end edge of the panel lip, and the fold of the panel lip that is spaced apart therefrom. Formed by providing a leading edge panel or a trailing edge panel. The fold of the panel lip may be folded onto the lower surface of the leading edge panel such that the leading end edge is below the leading edge end panel. This shape is particularly useful for making the edges easier to grasp.
Alternatively, the leading edge panel can be folded such that the leading end edge rests on the upper surface of the leading edge panel. The lip is also
It may be located on the upper or lower surface of the trailing edge panel.

With reference to FIG. 1, the folded wipes 1 are arranged such that each folded wipe 1 does not disturb the adjacent underlying folded wipe 1 in a container 20.
It is not folded in the stack 23 so as to be taken out from the stack. Instead, in some alternative embodiments, it may be desirable to further fold the adjacent folded wipe 1. For example, a panel such as a panel 10 of one folded wipe 1 could be sandwiched between the adjacent underlying panels 9 and 8 of the folded wipe. According to the invention, the wipes are stacked as a group of separate folded wipes. Multiple stacks of separate folded wipes can then be combined with those on other tops to provide a stack. The number of wipes in separate stacks and the combination of stacks can vary as required and depending on the containers being combined.

According to the invention, the overall dimensions of the substrate material depend on the intended use of the wipe and can be chosen accordingly. As one non-limiting example, in which the wipes may be used as wipes for cleaning hard surfaces, each folded wipe 1 (as shown in FIG. 2) has a leading end edge 2 to a trailing end edge 3. It may have an unfolded length of 10 cm to 40 cm and a width of 10 cm to 25 cm measured in the longitudinal direction. For each folded wipe 1, the length of the leading edge panel 9 and the trailing edge panel 10 can be from 2 cm to 7 cm. In a preferred embodiment,
The separation between the fold 6 of the first panel and the leading end edge 2 and the fold 7 of the second panel and the trailing edge 3 is preferably between 3 cm and 6 cm. The separation between the fold 6 of the first panel and the fold 12 of the third panel and between the fold 12 of the second panel and the fold 12 of the third panel is preferably between 3 cm and 12 cm, more preferably about 3 cm. 8 cm to 12 cm.

According to the present invention, the substrate material of the wipe is typically impregnated or coated with a liquid composition. The composition can be either an aqueous, alcoholic or water-in-oil or oil-in-water or multiple emulsion, preferably the emulsion is an oil-in-water emulsion. According to the invention, the liquid composition contains at least one volatile component as an essential component. The liquid composition has at least one
It contains species of volatile components, but can contain any number of volatile components if desired.
The volatile component is, by weight of the volatile component, from 0.005% to 40%, preferably from 0.01% to 20%, most preferably from 0.2% to 20% by weight of the total liquid composition.
% By weight. As used herein, the term volatile liquid refers to a liquid that has a vapor pressure at 20 ° C. of 17.5 mm or more of mercury.

Therefore, any liquid component of the liquid composition utilized for the wetting wipe will meet this volatility requirement as defined herein above. Typically, those liquid components are solvents, flavors, plant extracts, alcohols, ethers, acids,
Aldehydes, amines, essential oils and mixtures thereof. Suitable volatile components typically utilized in the composition are alcohols such as ethyl alcohol, isopropyl alcohol, allyl alcohol, acetaldehyde, formic acid, isopentylamine, butylethyl ether, butylamine and mixtures thereof.

According to the invention, it has now surprisingly been found that especially once the packaging has been opened,
It has been found that the presence of at least one anti-evaporation layer inserted between the wipes significantly reduces the evaporation of said volatile components from the composition applied to the wipes. The anti-evaporation layer is typically an inert, preferably hydrophobic layer, which is typically made from materials such as polypropylene and polyethylene. Preferably, said layer is polyethylene.

The anti-evaporation layer 24 can be provided in any desired color. Preferably, the layer is provided in a color different from the color of the wet wipe itself so that the consumer can easily identify the layer from the wipe. Alternatively, anti-evaporation layer 24 is provided as a transparent layer to allow the consumer to ascertain whether there is any wipe remaining in the package. In addition, the layer will also have a visual or tactile signal, such as embossing or printing, to assist the consumer in confirming the presence of the vapor barrier layer 24.

The anti-evaporation layer 24 of the present invention can have any form or size. Preferably, it is of the same shape and size as the wipe in its folded shape, and more preferably, it is of substantially the same size as the folded wipe. Alternatively, the anti-evaporation layer 24 may extend over the length and width of the folded wipe, thereby creating an additional sealing effect along the side edges of the stack of wipes, rather than the dimensions of the folded wipe. Can be given in large dimensions. The anti-evaporation layer 24 is preferably provided as a thin layer having a thickness of less than 100 micrometers, preferably less than 80 micrometers, more preferably less than 70 micrometers.

The anti-evaporation layer 24 can be inserted anywhere in the stack, preferably from 1: 1 to 50: 1, preferably from 3: 1 to 30: 1, most preferably from 5: 1. Inserts are preferably made at regular intervals with a 10: 1 wipe to evaporative barrier ratio. Most preferably, the top wipe on the stack of wipes is covered by an anti-evaporation layer 24.

Typically, the composition comprises from 2% to 50% by weight of the active ingredient of the composition and preferably from 50% to 98% by weight of deionized or distilled water. Would. For the active ingredient, preferably 2% to 20% is present in the oil phase, the remainder being in the aqueous phase.

Liquid compositions can provide a number of different benefits when released. For example, for cleaning wipes such as wet for perianal cleaning, the water component is released, thereby providing the primary cleansing action for those wipes.

In a preferred embodiment of the invention, the liquid composition (preferably comprising water as a major component) comprises a sterile component, preferably comprising an essential oil or an antimicrobial compound which is the active component thereof, and preferably a peroxide bleach. Bleaching agent.
Sterile wipes containing such liquid compositions provide effective infection control performance on the surface while being safe for the surface being treated.

By “effective sterilization performance” is meant herein that the sterile wipes of the invention allow a significant reduction in the amount of bacteria on infected surfaces. In fact, effective sterilization exists on a variety of microorganisms, including Gram-positive bacteria such as Staphylococcus aureus and Gram-negative bacteria such as Pseudomonas aeruginosa, as well as on infected surfaces (such as Candida albicans). It can be obtained against more resistant microorganisms such as fungi.

Another advantage of the sterile wipes according to the invention is that, in addition to the sterilization properties provided,
Good detergency is also provided because the sterile polar phase may also contain surfactants and / or solvents.

The essential component of such a sterile liquid composition is an antimicrobial, typically selected from the group consisting of essential oils and active ingredients thereof, parabens (eg, methylparaben, ethylparaben), glutaraldehyde and mixtures thereof. It is a microbial compound. Essential oils or active ingredients thereof are the preferred antimicrobial compounds used herein.

[0036] Essential oils or active ingredients thereof suitable for use herein are essential oils that exhibit antimicrobial activity, especially antibacterial activity. By "active ingredient of an essential oil" is meant herein any component of an essential oil that exhibits antimicrobial / antibacterial activity. A further advantage of said essential oils and their active ingredients is that they impart a pleasant odor to the sterile wipes according to the invention without having to add fragrance. In fact, the sterile wipes according to the invention give not only good sterilization performance on infected surfaces, but also a good odor.

[0037] Such essential oils include, but are not limited to, thyme, lemongrass, citrus, lemon, orange, anise, clove, aniseed, cinnamon, geranium, rose, mint, lavender, squirrel, eucalyptus, peppermint, camphor,
Includes those obtained from sandalwood and cedar and mixtures thereof.
Active ingredients of essential oils used herein include, but are not limited to, thymol (eg, present in thyme), eugenol (eg, present in cinnamon and cloves), menthol (eg, present in mint), Geraniol (e.g. in geraniums and roses), verbenone (e.g. in verbena), eucalyptol and pinocarbon (e.g. in eucalyptus),
Cedrol (eg, present in cedar), anethole (eg, present in anise), carbachlor, hinokitiol, barberine, terpineol, limonene, methyl salicylate, and mixtures thereof. Preferred active ingredients of the essential oils used here are thymol, eugenol, verbenone, eucalyptol, carbachlor, limonene and / or geraniol. Thymol is commercially available, for example, from Aldrich, and Eugenol is commercially available, for example, from Sigma, Systems-Bio Industries (SBI) -Mannheimer Inc.

Typically, the antimicrobial compound or mixture thereof comprises from 0.001% to 5%, preferably from 0.001% to 3%, more preferably 0.005% by weight of the liquid composition. To a level of from 1% to 1% by weight in the liquid composition.

An important component of the internal sterile polar phase is the bleach or a mixture thereof. Any bleach known to those skilled in the art, including any chlorine bleaches as well as any peroxide bleaches, will be suitable for use herein. The presence of a bleach, preferably a peroxide bleach, in the sterile wipes of the present invention contributes to the sterile properties of the wipe.

[0040] Chlorine bleaches suitable for use herein include any compound capable of releasing chlorine when the compound contacts water. Suitable chlorinated bleaches include alkali metal dichloroisocyanurates and alkali metal hypohalites such as hypochlorite and / or hypobromite. Preferred chlorine bleach is an alkali metal hypochlorite. Various forms of alkali metal hypochlorite are commercially available, such as, for example, sodium hypochlorite.

Preferred bleaches for use herein are peroxide bleaches, especially hydrogen peroxide, or a water-soluble source thereof, or a mixture thereof. Hydrogen peroxide is particularly preferred.

A peroxide bleach, such as hydrogen peroxide, is preferred here. Since they are generally well tolerated from an environmental point of view. For example, the decomposition products of hydrogen peroxide are oxygen and water. As used herein, hydrogen peroxide source refers to any compound that produces perhydroxy ions when the compound contacts water. Suitable water-soluble sources of hydrogen peroxide for use herein include percarbonate, persilicic acid, persulfates such as monopersulfate, perboric acid, diperoxide decandioic acid (DPDA)
Peroxy acids, magnesium perphthalates, dialkyl peroxides, diacyl peroxides, percarboxylic acids of formic acid, organic and inorganic peroxides and / or hydroperoxides and mixtures thereof. Typically, the bleach or mixture thereof will comprise from 0.001% to 15%, preferably from 0.001% to 5%, and more preferably from 0.005% to 2% by weight of the liquid composition. Present at the% level. The liquid composition may further comprise a detergent surfactant or a mixture thereof. Typically, the surfactant or mixture thereof comprises from 0.001% to 4% by weight of the total internal polar phase.
0% by weight, preferably 0.01% to 10% by weight, and more preferably 0% by weight.
. It is present at a level of from 05% to 2% by weight. Suitable detergent surfactants for use in the present invention include any surfactant known to those skilled in the art, such as nonionic, anionic, cationic, amphoteric and / or zwitterionic surfactants. . Preferred detergent surfactants used herein are amphoteric and / or zwitterionic surfactants.

Suitable amphoteric detergent surfactants used herein include those of the formula R¹R^TwoR^ThreeNO (expression
Medium, R¹, R^TwoAnd R^ThreeAre each independently saturated, substituted
Carbon having 1 to 30 carbon atoms, straight or branched, unsubstituted or substituted
Amine oxides that are hydride chains). Preference used by the present invention
Amine oxide surfactants have the formula R¹R^TwoR^ThreeAn amine oxide of NO,
Where R¹Is 1 to 30, preferably 6 to 20, more preferably 8 to 16,
Most preferred are hydrocarbon chains having from 8 to 12 carbon atoms, wherein R^Twoand
R^ThreeHas independently 1 to 4 carbon atoms, preferably 1 to 3 carbon atoms, more preferably
Substituted or unsubstituted, straight-chain or
It is a branched hydrocarbon chain. R¹Is saturated, substituted or substituted
It can be a straight or branched hydrocarbon chain. Suitable for use here
Clear amine oxides can be obtained, for example, from natural mixed C commercially available from Hoechst. ₈ ~ C_TenAmine oxide and C₁₂~ C₁₆Amine oxide. Here
Minoxide is preferred. Because it gives effective cleaning performance and furthermore
This is because it also affects the sterilization characteristics of the sterilization wipe here.

Suitable zwitterionic surfactants for use herein contain both cationic and anionic hydrophilic functional groups for the same molecule over a relatively wide range of pH. A typical cationic functional group is a quaternary ammonium group, however, other positively charged functional groups such as phosphonium, imidazolinium and sulfonium groups may also be used. Typical anionic hydrophilic functional groups are carboxylate and sulfonate, however, other functional groups such as sulfates, phosphonates and the like may be used. Formula for some zwitterionic surfactants to be used ^{herein, R 1 -N + (R 2} ) (R 3) R 4 X - ( wherein, R ¹ is a hydrophobic functional radical, R ² and R ³ are each a C ₁ -C ₄ alkyl, hydroxyalkyl or other substituted alkyl group which can also be combined with N to form a ring structure, and R ⁴ is a cationic nitrogen atom on the hydrophilic functional group And typically is an alkylene, hydroxyalkylene, or polyalkylene group containing from 1 to 10 carbon atoms, and X is a hydrophilic functional group, preferably a carboxylate or sulfonate group. It is. Preferred hydrophobic functional groups R ¹ are alkyl groups containing 1 to 24, preferably less than 18, more preferably less than 16 carbon atoms. The hydrophobic functional groups may include unsaturated and / or substituted and / or linked (link) functional groups, such as aryl groups, amide groups, ester groups, and the like. In general, simple alkyl groups are preferred for cost and stability reasons.

Highly preferred zwitterionic surfactants include betaine and sulfobetaine surfactants, derivatives thereof or mixtures thereof. Here, the betaine or sulfobetaine surfactant is preferred. Because they aid in sterilization by increasing the permeability of the bacterial cell wall, thus allowing other active ingredients to enter the cells.

Furthermore, due to the mild action profile of said betaine or sulfobetaine surfactants, they are particularly suitable for cleaning delicate surfaces, such as, for example, hard surfaces in contact with food and / or infants. is there. Betaine and sulfobetaine surfactants are also very mild to the skin and / or surface to be treated.

Betaine and sulfobetaine surfactants suitable for use herein are bases whose molecules form internal salts that give the molecule both cationic and anionic hydrophilic functionalities over a wide range of pH values. Betaine / sulfobetaine and betaine-like detergents containing both acidic and acidic functional groups. Some general examples of such detergents are described in U.S. Patent Nos. 2,082,275, 2,702,279, and 2,255,082, which are incorporated herein by reference. . Preferred betaine and sulfobetaine surfactants herein have the formula

Embedded image

Wherein R ¹ is 1 to 24 carbon atoms, preferably 8 to 18, more preferably 1
A hydrocarbon chain comprising 2 to 14 wherein R ² and R ³ are hydrocarbon chains comprising 1 to 3 carbon atoms, preferably 1 carbon atom, wherein n is 1 to 10, preferably Is an integer from 1 to 6, more preferably 1 and Y is selected from the group consisting of carboxyl and sulfonyl radicals, wherein the sum of R ¹ , R ² and R ³ hydrocarbon chains is from 14 to 24 carbon atoms or It is a mixture. ).

Examples of particularly suitable betaine surfactants include C _12- like coconut betaine.
C ₁₀ -C ₁₆ alkyl dimethyl betaines such as C ₁₈ alkyl dimethyl betaine and lauryl betaine are included. Coconut Betaine is Amonil
yl) 265 "commercially available from Seppic. Lauryl betaine is available under the trade name Empigen BB / L
"Under Albright & Wilson
) Is commercially available from

Another specific zwitterionic surfactant has the general formula R ¹ —C (O) —N (R ² ) — (C (R ³ ) ₂ ) _n —N (R ² ) ₂ ^{(+) _{- (C (R 3) 2}} ) n -SO 3 (-); or ^{R 1 -C (O) -N (} R 2) - (C (R 3) 2) n -N (R 2) 2 (+ ⁾ -(C (R ³ ) ₂ ) _n -COO ^{(-) wherein} each R ¹ is, for example, from 8 to 20, preferably up to 18,
More preferably a hydrocarbon such as an alkyl group containing up to 16 carbon atoms,
Each R ² is either hydrogen (when attached to the amide nitrogen), either short chain alkyl containing 1 to 4 carbon atoms or substituted alkyl, preferably methyl, ethyl, propyl, hydroxy substituted A functional group selected from the group consisting of ethyl or propyl and mixtures thereof, preferably methyl, each R ³ is selected from the group consisting of hydrogen and a hydroxy group, and each n is 1 to 4 , Preferably 2 to 3, more preferably 3, having no more than one hydroxy group in any (C (R ³ ) ₂ ) moiety. The R ¹ group can be branched and / or unsaturated. The R ² groups may also be linked to form a ring structure. Surfactants of this type are available under the trade name "Barion (Va
rion) is a CAS sulfobetaine C ₁₀ -C ₁₄ fatty system acylamide propylene (hydroxypropylene) sulfobetaine that is available from Sherex (Sherex) · Company under ".

Nonionic surfactants suitable for use herein are fatty alcohol ethoxylates and / or propoxylates that are commercially available with various fatty alcohol chain lengths and various degrees of ethoxylation. In fact, the HLB value of such alkoxylated nonionic surfactants depends essentially on the chain length of the fatty alcohol, the nature of the alkoxylation and the degree of alkoxylation. A catalog of surfactants is available, which lists a number of surfactants, including nonionics, with their respective HLB values.

Particularly suitable for use herein as nonionic surfactants are hydrophobic nonionic surfactants having an HLB (hydrophilic-lipophilic balance) of less than 16, more preferably less than 15. These hydrophobic nonionic surfactants have been found to provide good grease dissolution properties. Preferred nonionic surfactants for use herein have the formula RO- (C ₂ H ₄
O) _n (C ₃ H ₆ O) _m H nonionic surfactant, where R is a C ₆ to C ₂₂ alkyl chain or a C ₆ to C ₂₈ alkyl benzene chain, and n + m is 0.
To 20; n is from 0 to 15; m is from 0 to 20;
+ M is from 1 to 15, n and m are from 0.5 to 15, more preferably n +
m is from 1 to 10, and n and m are from 0 to 10. Preferred R chains for use herein are C ₈ to C ₂₂ alkyl chains. Thus, a suitable hydrophobic nonionic surfactant for use herein is Dobanol R91
-2.5 (HLB = 8.1; R is a mixture of C ₉ and C ₁₁ alkyl chains, n
Is 2.5 and m is 0) or Lutensol®
TO3 (HLB = 8; R is a C ₁₃ alkyl chain, n is 3 and m is 0), or Lutensol RA03 (HLB = 8; R is a mixture of C ₁₃ and C ₁₅ alkyl chains) , N is 3 and m is 0), or tertitol (Ter
gitol) R 25L3 (HLB = 7.7; R ranges from C ₁₂ to C ₁₅ alkyl chain length, n is 3 and m is 0), or dovanol R 23-3 (
HLB = 8.1; R is a mixture of C ₁₂ and C ₁₃ alkyl chains, n is 3 and m is 0) or dovanol R 23-2 (HLB = 6.2; R is C ₁₂ and C ₁₃ is a mixture of alkyl chains, n is 2, m is 0), or Dobanol R 45-7 (HLB = 11.6; R is a mixture of C ₁₄ and C ₁₅ alkyl chains, n is 7 and m is 0), dovanol R 23-6.5 (
HLB = 11.9; R is a mixture of C ₁₂ and C ₁₃ alkyl chains and n is 6.5
And m is 0), or dovanol R 25-7 (HLB = 12; R is a mixture of C ₁₂ and C ₁₅ alkyl chains, n is 7 and m is 0), or dovanol R 91-5 (HLB = 11.6; R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 5 and m is 0), or dovanol R 91
-6 (HLB = 12.5; R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 6 and m is 0), or dovanol R 91-8 (HLB = 13.7
R is a mixture of C ₉ and C ₁₁ alkyl chains, n is 8 and m is 0), dovanol R 91-10 (HLB = 14.2; R is a C ₉ to C ₁₁ alkyl chain; A mixture, n is 10 and m is 0), or a mixture thereof. Preferred here are dovanol R 91-2.5, or Lutensol R TO3, or Lutensol R AO3, or Taditol R 25L.
3, or dovanol R23-3, or dovanol R23-2, or dovanol R23-10, or a mixture thereof. Dovanol® surfactant is commercially available from Shell. Lutensol R surfactant is BAS
F is commercially available from F and Tergitol R surfactant is commercially available from Union Carbide. Suitable anionic surfactants for use herein, include water-soluble salts or acids of the formula ROSO ₃ M, wherein, R is preferably a C ₆ -C ₂₄ hydrocarbons, preferably alkyl or C ₈ ~ hydroxyalkyl having a C ₂₀ alkyl moiety, more preferably a C ₈ -C ₁₈ alkyl or hydroxyalkyl, M is H or, for example, an alkali metal cation (e.g., sodium, potassium, lithium),
Or ammonium or substituted ammonium (e.g., quaternary derived from alkyl, such as methyl, dimethyl and trimethylammonium cations and tetramethylammonium and dimethylpiperidinium cations and ethylamine, diethylamine, triethylamine, and mixtures thereof). Quaternary ammonium cations such as ammonium cations). Other anionic surfactants suitable for use herein include alkyl diphenyl ether sulfonates and alkyl carboxylate. Other anionic surfactants include salts (e.g., sodium, potassium, ammonium, and mono-, di-, and substituted ammonium salts such as triethanolamine salt), C ₉ -C ₂₀ linear alkyl benzene sulfonates, C ₈ -C ₂₂ primary or secondary alkane sulfonates, C ₈ -C ₂₄ olefin sulfonates, for example, British Patent specification citric acid alkaline earth metal salts such as described in No. 1,082,179 sulfonated polycarboxylic acids prepared by sulfonation of the pyrolyzed product of (including ethylene oxide up to 10 mole) C ₈ -C ₂₄ alkyl polyglycol ether sulfates, alkyl such as C ₁₄ -C ₁₆ methyl ester sulfonate Ester sulfonate, acylglycerol sulfonate, fatty acid Rail glycerol sulfate, alkylphenol ethylene oxide ether sulfate, paraffin sulfonate, alkyl phosphate, isethionate such as acyl isethionate, N-acyl taurate, alkyl succinate and sulfosuccinate, monoester of sulfosuccinate (particularly saturated and unsaturated C ₁₂ -C ₁₈ monoesters), sulfosuccinates diester (especially saturated and unsaturated C ₆ -C ₁₄ diesters), acyl sarcosinates, alkyl polysaccharides such as sulfates of alkylpolyglucoside sulfates (nonionic nonsulfated salt compounds are below), branched primary alkyl sulfates of the formula _{RO (CH 2 CH 2 O)} k CH 2 COO - M + ( wherein, R C ₈ -C ₂₂ alkyl And k is from 0 to 10. And M is a soluble salt-forming cation). Resin acids and hydrogenated resin acids such as rosin, hydrogenated rosin, and resin acids present in or derived from tall oil are also suitable. . Yet another example is "Surface Active Agent and Detergent (Surfactants and Detergents)" (Schwartz (Sch
wartz), Perry and Berch, Volumes 1 and 2). A variety of such surfactants are also generally described in U.S. Pat. No. 3,929,678, issued Dec. 30, 1975 to Laughlin et al., Column 23, lines 58-29. Column 2
Also disclosed in three lines (incorporated herein by reference). Preferred anionic surfactants for use herein are alkyl benzene sulfonates, alkyl sulfates, alkyl alkoxylated sulfates, paraffin sulfonates and mixtures thereof. The internally sterilized polar phase according to the invention has a pH of 1 to 12, preferably 1.5 to 10, and more preferably 2 to 9. The pH can be adjusted by using an alkalizing or oxidizing reagent. Examples of alkalizing reagents are alkali metal hydroxides such as potassium hydroxide and / or sodium hydroxide or alkali metal oxides such as sodium oxide and / or potassium oxide. Examples of oxidizing reagents are organic or inorganic acids such as citric acid or sulfuric acid. A solvent may be present in the liquid composition according to the present invention. Those solvents will advantageously provide superior cleanability to the sterile wipes of the present invention. Suitable solvents for inclusion herein include propylene glycol derivatives such as n-butoxypropanol or n-butoxypropoxypropanol, water-soluble CARBITOL solvents or water-soluble CELLOSOLVE solvents. Water-soluble CARBITOL solvent is
It is a compound of the 2- (2-alkoxyethoxy) ethanol class where the alkoxy group is derived from ethyl, propyl or butyl. A preferred water-soluble carbitol is 2- (2-butoxyethoxy) ethanol, also known as butyl carbitol. The water-soluble CELLOSOLVE solvent is a compound of the 2-alkoxyethoxyethanol class, with 2-butoxyethoxyethanol being preferred. Other suitable solvents are benzyl alcohol, methanol, ethanol, isopropyl alcohol and 2-ethyl-1,3-hexanediol and 2,2,4
Diols such as trimethyl-1,3-pentanediol and mixtures thereof. Preferred solvents for use herein are n-butoxypropoxypropanol, butyl carbitol, and mixtures thereof. The most preferred solvent for use herein is butyl carbitol. The liquid composition further comprises a radical scavenger (scavenger), chelating agent, thickener, builder, buffer, stabilizer, bleach activator (bleach activator),
Other optional ingredients may also be included, including soil suspending agents, dye transfer agents, brighteners, anti-dusting agents, enzymes, dispersants, dye transfer inhibitors, pigments, fragrances, dyes, and the like. Suitable radical scavengers for use herein include the well-known substituted mono- and dihydroxybenzenes and their derivatives, alkyl and aryl carboxylates, and mixtures thereof. Preferred radical scavengers for use herein include di-tert-butylhydroxytoluene (BHT), p-hydroxytoluene, hydroquinone (HQ), di-ter
t-butylhydroquinone (DTBHQ), mono-tert-butylhydroquinone (MTBHQ), tert-butylhydroxyanisole, p-hydroxyanisole, benzoic acid, 2,5-dihydroxybenzoic acid, 2,5-dihydroxyterephthalic acid, Toluic acid, catechol, t-butylcatechol, 4-allylcatechol, 4-acetylcatechol, 2-methoxyphenol, 2-ethoxyphenol, 2-methoxy-4- (2-propenyl) phenol, 3,4-dihydroxybenzaldehyde, 2,3-dihydroxybenzaldehyde, benzylamine, 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane, tert-butylhydroxyaniline, p-hydroxyaniline and n-gallic acid Step Pill is included. Highly preferred for use herein is di-tert-butylhydroxytoluene, which is commercially available, for example, from Shell under the trade name IONOL CP. Typically, the radical scavenger or mixture thereof is 5% by weight,
Preferably it is present in the liquid composition at a level of from 0.001% to 3%, and more preferably from 0.001% to 1.5% by weight. Suitable chelators for use herein are selected from the group consisting of phosphonate chelators, aminocarboxylate chelators or other carboxylate chelators, or multifunctionally substituted aromatic chelators and mixtures thereof. It can be any chelating agent known to those skilled in the art, such as Such phosphonate chelating agents include etidronic acid (1-hydroxyethylidenebisphosphonic acid or HEDP) and aminophosphonate compounds, including aminoalkylene poly (alkylene phosphonates), alkali metal ethane 1-hydroxydiphosphonate Salts, nitrilotrimethylenephosphonates, ethylenediaminetetramethylenephosphonates, and diethylenetriaminepentamethylenephosphonates may be included. The phosphonate compound can be present either in its acid form or as a salt of a cation that differs for some or all of its acid functions. A preferred phosphonate chelating agent for use herein is diethylenetriaminepentamethylenephosphonate. Such phosphonate chelating agents are commercially available from Monsanto under the trade name DEQUEST. Multifunctionally substituted aromatic chelators may also be useful herein. Conner
No. 3,812,044, issued May 21, 1974 to Norr et al.
See issue No. A preferred compound of this type in the acid form is dihydroxydisulfobenzene, such as 1,2-dihydroxy-3,5-disulfobenzene. Preferred biodegradable chelating agents for use herein are ethylenediamine N,
N′-disuccinic acid, or an alkali metal salt or an alkaline earth metal salt thereof,
Ammonium salts or substituted ammonium salts or mixtures thereof. Ethylenediamine N, N'-disuccinic acid, especially its (S, S) isomer, was disclosed by Hartman and Perkins on Nov. 3, 1987.
This is described in detail in U.S. Pat. For example, ethylenediamine N, N'-disuccinic acid is available from Palmer (Palme).
r) Commercially available from Research Laboratories under the trade name ssEDDS. Suitable aminocarboxylate chelating agents useful herein include ethylenediaminetetraacetate, diethylenetriaminepentaacetate, diethylenetriaminepentaacetate, in its acid form or in both its alkali metal, ammonium and substituted ammonium salt forms. (DTPA), N-hydroxyethylethylenediamine triacetate, nitrilotriacetate, ethylenediaminepentapropionate, triethylenetetraamine hexaacetate, ethanoldiglycine, propylenediaminetetraacetic acid (PDTA) and methylglycinediacetate (MGDA) ) Is included. Particularly suitable for use herein are diethylenetriaminepentaacetic acid (DTPA), such as propylenediaminetetraacetic acid (PDTA), commercially available from BASF under the trade name Trilon FS, and methylglycine Diacetate (MGDA). Further, the carboxylate chelating agents used herein include malonic acid, salicylic acid, glycine, aspartic acid, glutamic acid, dipicolinic acid, and derivatives or mixtures thereof. Typically, the chelating agent or mixture thereof will comprise from 0.001% to 5%, preferably from 0.001% to 3%, and more preferably from 0.001% to 5% by weight in the liquid composition. It is present at a level of 1.5% by weight. The sterile wipes according to the present invention are suitable for sterilizing a variety of surfaces, including biological surfaces (eg, human skin) as well as inanimate surfaces, including any hard surfaces. Other water-soluble or water-dispersible materials that may be present in the liquid composition include thickeners and viscosity improvers. Suitable thickeners and viscosity improvers include Carbopol (C
polyacrylic resins such as arbopol and Pemulen and modified to hydrophobize, starches such as corn starch, potato starch, tapioca, gums such as guar gum, gum arabic, hydroxypropyl cellulose, Examples include cellulose ethers such as hydroxyethylcellulose and carboxymethylcellulose. These thickeners and viscosity modifiers will typically be included in concentrations ranging from about 0.05% to about 0.5% of the liquid composition. Also, when water is a major component of the liquid composition, water soluble or water dispersible materials that may be present in the internal phase include polycationic, which provide steric stabilization at the polar-oil phase interface. Nonionic polymers that also stabilize the polymer and emulsion are included. Suitable polycationic polymers include Reten 201,
Kymene (registered trademark) 557H and Acco 71
1 is included. Suitable nonionic polymers include Carbowax (Carbow wax).
ax) such as polyethylene glycol (PEG) and poly (propylene glycol) butyl ether. The polycationic and nonionic polymers will typically be included at a concentration ranging from about 0.05 to about 1.0% of the liquid composition. According to the present invention, for wet wipe applications specifically designed for use on human skin, such as baby wipes, the composition may be aqueous, alcoholic or water-in-oil or oil-in-water or It can be any emulsion of a multiple emulsion, preferably the emulsion is an oil-in-water emulsion. Typically, the composition comprises from 2% to 50% by weight of the active ingredient of the composition and 50%
To 98% water, preferably deionized or distilled water. Preferably, from 2% to 20% of the active ingredient is in the oily phase and the balance is in the aqueous phase. According to the present invention, the wet wipe comprises an emulsion composition comprising an oil phase in the range of 1% to 20%, preferably 2% to 10% by weight of the composition. Advantageously, the oleaginous phase may be derived from natural sources, such as from vegetable or animal oils, or may be synthetic or any mixture thereof. Vegetable and animal oils suitable for use herein include beeswax, lanolin, waxes such as candelilla, and oils such as glycerin esters and glycerin ethers, fatty alcohols, caprylic triglycerides and capric triglycerides and octyl palmitate. Such fatty acid esters and fatty acid ethers are included. Suitable mineral oils include petroleum-based oils such as paraffin and petroleum jelly. Synthetic oils for use herein include, for example, ethylene-based polymers such as polyethylene wax or silicone-based oils. Suitable silicone oils include polydimethylsiloxanes, volatile cyclomethicones, dimethiconols, amino and phenyl derivatives of siloxysilicates and siloxanes, and mixtures thereof. Examples include dimethicone (Dow Corning 200 Fluid), cyclomethicone and dimethiconol (Dow Corning 1).
401 fluid), cetyl dimethicone (Dow Corning 2502 fluid),
Dimethicone and trimethylsiloxysilicate (Dow Corning 593 fluid), cyclomethicone (Dow Corning 244, 245, 344 or 34)
5 fluid), phenyltrimethicone (Dow Corning 556 fluid) or a combination thereof. Oil-in-water emulsions typically require an emulsifier. The emulsifier that can be used in the present invention is preferably capable of primary emulsification of an oil-in-water emulsion. The emulsifier comprises from 0.02% to 5.0% by weight of the composition, preferably from 0.02% to 5.0%.
It is present in the range from 2% to 3.0% by weight. In a preferred embodiment, the emulsifier is, C ₁₀ -C ₃₀ alkyl acrylate and acrylic acid, one or more of these simple esters crosslinked with allyl ethers of copolymers or sucrose allyl ether or pentaerythritol monomers methyl acrylate Is a polymer type emulsifier such as one of the above. Accordingly, emulsifiers useful in the present invention include those described in US Pat. F. Ceteareth, available from Goodrich Company-
12, Ceteareth-20 or Pemulen TR1 and TR2
Is included. However, other known emulsifiers such as ethoxylated fatty alcohols, glycerin esters of fatty acids, soaps, sugar derivatives are also suitable for use herein. Other useful emulsifiers include those specifically disclosed in EP-A-328355. According to the present invention, the composition may include a stabilizer or a preservative. Suitable stabilizers for use herein include phenoxyethanol, sodium benzoate, potassium sorbate, methyl paraben, propyl paraben, ethyl paraben, butyl paraben, benzoate, preferably present in the range of 0.1 to 1.0%. Sodium acid, potassium sorbate, benzalkonium chloride, and disodium ethylenediaminetetraacetate (hereinafter referred to as EDTA) or other EDTA salts (Sequestren) are included. Sequestrene is a common complex reagent and metal complex of a series of ethylenediaminetetraacetic acids and salts. The total amount of stabilizer is
It should range from 0.1% to 4.0% by weight of the composition. The compositions of the present invention may further comprise from 0.02% to 5.0% by weight of the composition of an emollient or humectant. Preferably the emollient is water-soluble and includes polyhydric alcohols such as propylene glycol, glycerin,
Also included are water-soluble lanolin derivatives. In the manufacture of a wet wipe product according to the present invention, the composition is applied to at least one surface of a substrate material. The composition may be applied at any time during the manufacture of the wet wipe. Preferably, the composition may be applied to the substrate after the substrate has been dried. Numerous application methods can be used to evenly distribute the lubricating material having a molten or liquid consistency. Suitable methods include spraying, printing (eg, flexographic printing), coating (eg, gravure or flood coating), and contacting the composition with the substrate while the substrate passes through a tube or combination of application techniques. An extrusion is included that is threaded through a tube. For example, the composition is then sprayed onto a rotating surface such as a calender roll that transfers the composition to the surface of the substrate. The composition may be applied to either one or both surfaces of the substrate, preferably to both surfaces. A preferred method of application is extrusion coating. The composition may also be applied uniformly or non-uniformly to the surface of the substrate. Non-uniformity means that, for example, the amount of distribution of the composition, the pattern may vary over the surface of the substrate. For example, a portion of the surface of the substrate may have a greater or lesser amount of the composition, including that a portion of the surface has no composition thereon. However, preferably, the composition is applied unevenly to the surface of the wipe.
The composition is typically applied in an amount of about 0.5 g to 10 g per gram of substrate, preferably 1.0 g to 5 g per gram of substrate, most preferably 2 g to 4 g per gram of dry substrate. Is done. Preferably, the composition can be applied to the substrate anywhere after it has been dried. For example, the composition may be used before and after calendering and before being wound on a parent roll.
It can be applied to a substrate. Typically, application is performed on an unwound substrate from a roll having a width equal to the substantial number of wipes intended to be manufactured. The substrate provided with the composition is then sequentially cut to make individual wipes. Example 1 A) Preparation of Carrier The carrier is an air-laid nonwoven substrate comprising 70% pulp, 15% PET and 15% latex. The substrate has a basis weight of 82 g / m ^2. B) Preparation of Liquid Composition The liquid composition is prepared from the components shown in Table 1.

[Table 1]

To make the composition, all ingredients were mixed with each other and then added to 140 ° F. (4
5.8 ° C).

C) Application of Liquid Composition to Carrier The liquid composition prepared in the step B is applied to the carrier by spraying.

The coated carrier is then perforated, folded and stacked. Then, an evaporation preventing layer is inserted between every five wipes. The stack is then sealed to wipe the end product. After folding and sealing,
The composition coats both interior sides of the wipe to provide the product of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic illustration of a cross section of a stack of folded wipes in a container including an anti-evaporation layer.

FIG. 2 is a perspective view showing a folded wipe having a leading edge panel 9, a central panel 8, and a trailing (pulling) edge panel 10 in a Z-shaped folded configuration.

FIG. 3 is a perspective view showing a preferred folded wipe shape.

FIG. 4 is an illustration of a cross-section of a folded wipe having a lip 36 on a leading edge panel.

[Explanation of symbols]

 Reference numeral 20: container, 22: lid, 24: anti-evaporation layer

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) A61K 7/02 A61K 7/02 A 7/48 7/48 C11D 3/50 C11D 3/50 7/26 7 / 26 7/32 7/32 7/40 7/40 7/44 7/44 7/50 7/50 7/60 7/60 17/08 17/08 (81) Designated country EP (AT, BE, CH , CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE), OA (BF, BJ, CF, CG, CI, CM, GA, GN) , GW, ML, MR, NE, SN, TD, TG), AP (GH, GM, KE, LS, MW, SD, SL, SZ, UG, ZW), EA (AM, AZ, BY, KG) , KZ, MD, RU, TJ, TM), AE, AL, AM, AT, AU, AZ, BA, B, BG, BR, BY, CA, CH, CN, CU, CZ, DE, DK, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS , JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MD, MG, MK, MN, MW, MX, NO, NZ, PL, PT, RO, RU, SD, SE, SG, SI, SK, SL, TJ, TM, TR, TT, UA, UG, US, UZ, VN, YU, ZA, ZW (71) Applicant ONE PROCTER & GANBLE PLAZA, CINCINNATI, OHIO, UNITED STATES OF AMERICA F-term (reference) 4C083 AA112 AA121 AB412 AC032 AC061 AC102 AC171 AC211 AC241 AC531 AC562 AD532 BB41 CC24 DD12 EE11 4H003 AC15 BA21 BA22 DA02 DA08 DA17 DA16 DA16 DA16 DA16 DA16 DA16 DA16 DA16 DA16 DA17 24 EB43 ED02 ED28 EE04 FA02 FA24 FA27 FA34 FA45

Claims (10)

[Claims] 1. A stack of wet wipes, each of said wipes comprising:
It comprises a substrate and a liquid composition, wherein the liquid composition comprises at least one volatile component, and the stack further comprises at least one anti-evaporation layer to prevent evaporation of the volatile components. And a stack of wet wipes. 2. A wet wipe stack according to claim 1, wherein said volatile components are selected from solvents, fragrances, plant extracts, alcohols, ethers, acids, aldehydes, amines, essential oils and mixtures thereof. 3. The stack of wet wipes according to claim 1, wherein the liquid composition comprises 0.005% to 40% by weight of the volatile component of the liquid composition. 4. A stack of wet wipes according to claim 3, wherein said liquid composition comprises from 0.01% to 20% by weight of said volatile components of said liquid composition. 5. The method according to claim 1, wherein the evaporation preventing layer is selected from a polyethylene layer, a polypropylene layer and a polypropylene / polyethylene layer.
A stack of wet wipes as described in paragraph. 6. The stack of wet wipes according to claim 1, wherein the ratio of the number of wipes in the stack to the number of anti-evaporation layers in the stack is from 1: 1 to 50: 1. . 7. The stack of wet wipes according to claim 1, wherein the ratio of the number of wipes in the stack to the number of evaporation-prevention layers in the stack is from 3: 1 to 30: 1. . 8. The stack of wet wipes according to claim 1, wherein the substrate is an air-laid nonwoven fabric comprising hydrophilic fibers and hydrophobic fibers. 9. Each of the wipes comprises from 0.5 g to 10 g per gram of substrate
9. A stack of wet wipes according to any of the preceding claims, comprising a liquid composition of claim 1. 10. Use of an anti-evaporation layer in a stack of wet wipes according to claim 1, for preventing evaporation of volatile components.