JP2002501117A - Wet article with multi-phase multi-component emulsion and activated web - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an integrated support / activator cleansing article that can be easily activated to release and deliver an active agent and that can efficiently utilize the active agent. Disclosed is a disposable cleansing article (1) comprising a multi-phase multi-component emulsion (5) and an activation web (2) that promotes activation of the emulsion during use. In a preferred embodiment, the multiple emulsion is a high internal phase inverse emulsion having a continuous external lipid phase and a discontinuous internal polar phase. During use, the activated web promotes the rupture of the outer phase of the emulsion, thereby releasing the inner phase for its desired use. The internal liquid phase can account for up to about 97% of the emulsion, so that significant amounts of fluid (eg, moisture or polar liquids) can be delivered from the “dry” wipe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

The present invention relates to articles useful in a wide range of cleansing applications. The invention particularly relates to wet cleaning wipes made from a textured carrier support that has been treated with a multi-phase, multi-component emulsion that can be activated to release a liquid phase.

[0002]

[Prior art]

In personal and household cleaning techniques, many approaches have been developed to address the needs of cleansing. These approaches can be broadly classified into two main types. One utilizing a substantially dry support and a separate cleansing agent, and one utilizing an integrated support / cleansing agent combination.

[0003] The first approach typically involves the user utilizing a dry support of his or her choice, which has the desired absorbency and texture properties. Commonly used supports include disposable and reusable paper towels, natural and / or synthetic fabrics, and the like. The user then applies the emulsion of the desired composition to either the target surface and / or the dried support,
Apply the support to the target surface and perform any desired wiping or cleansing. Although this approach has been used for many years, users need to keep separate stocks of the support and the emulsion. Also, it is often inconvenient to put the emulsion in a commonly used container and transport it to a remote location. In addition, determining the proper and effective amount of emulsion to apply is a matter of trial and error.

[0004] To address these consumer issues, more recently, integrated support / cleansing agent products have been developed, where they are used with the desired amount of emulsion already applied. The support is packaged. One example of this type of product is a pre-packaged and pre-wetted wet napkin, often available at convenience stores, for washing hands before or after a meal. Another example is a pre-wetted "baby wipe", often used for childcare. Such products have met with considerable commercial success, but require some packaging to prevent the emulsion from evaporating, contaminating, or degrading before use. In addition, depending on the desired situation, it is inconvenient to discard the container and to separate and use the wet supports one by one when many products are packaged.

[0005] More recently, integrated support / cleansing products have been developed that address the concerns of storing "wet" or activated equipment in a usable condition. These articles use a textured carrier support that has been treated with a multi-phase emulsion having a dispersed polar phase and a continuous lipid phase. These articles have a number of significant advantages over conventional cleansing products, especially in the form of wet cleansing wipes. These articles release significant amounts of the inner polar phase (eg, water) during use, resulting in effective cleaning. The continuous lipid phase of the emulsion is brittle enough to easily rupture with small shear contact (eg, while wiping the skin) and release this internal phase immediately, but too fast of the internal phase during severe processing Strong enough to avoid release. Also, the continuous lipid phase of these products is sufficiently stable during storage to prevent significant evaporation of the internal polar phase.

[0006] These articles can be used in many applications where it is necessary to deliver a polar or liquid internal phase, such as water, and actives dispersible in such polar materials. These applications include cleaning hard surfaces such as floors, kitchen counters, kitchen sinks, bathtubs, toilet bowls, and delivering antimicrobial or pharmaceutical actives that can be dissolved or dispersed in polar liquids. These articles can also perform multiple functions. For example, the emulsions applied to these articles can be formulated to provide the benefits of cleaning and waxing when used in furniture, shoes, automobiles, and other types.

[0007] While this variety of articles has been found to be effective, it is often necessary to activate a sufficient amount of the emulsion to meet the needs of the end user, or to reduce the volume of the emulsion loaded into the article. Efficient sending either is difficult. As a result, it is often necessary to increase the overload of the emulsion of the carrier material to overcompensate to ensure that a sufficient amount of the internal polar phase is available.

[0008]

[Problems to be solved by the invention]

Thus, an integrated support / active agent that can efficiently utilize the active agent
gent) It is desirable to provide a cleansing article.

It is also desirable to provide a cleansing article that can be easily activated to release and deliver the active agent.

[0010]

[Means for Solving the Problems]

The present invention relates to cleansing articles that are provided in a dry state, but can release significant amounts of liquid when activated by an end user. In particular, the invention comprises: (a) having a first surface having one or more regions exhibiting a textured three-dimensional surface topography, and a second surface, wherein the wet caliper and the dryness A cleansing article comprising: an activated web having a ratio to thickness (resilience ratio) of at least about 0.9; and (b) a multi-phase, multi-component emulsion in direct contact with the first surface of the activated web.

In use, the textured activated web facilitates the breaking of the external continuous phase of the emulsion and releases the internal polar phase for the desired application.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

While the specification concludes with claims that particularly point out and distinctly claim the invention, it is believed the present invention will be better understood from the following description of preferred embodiments, taken in conjunction with the accompanying drawings. In the drawings, like reference numbers refer to identical parts.

A. Definitions As used herein, the term "comprising" means that the various components, components, or steps can be used together in practicing the present invention. Thus, the term “comprising” is more limited to the terms “consisting essentially of” and “consisting of”
Is included.

As used herein, the terms “detergent,” “detersive surfactant,” and “detergent surfactant” are used interchangeably.
Refers to any substance that lowers the surface tension of water, especially surfactants that concentrate at the oil-water interface and exert an emulsifying action, thereby helping to remove soil.

As used herein, “polar” refers to a molecule in which the positive and negative charges are permanently separated, as opposed to a molecule having a dipole moment, ie, a nonpolar molecule in which the positive and negative charges occupy the same space. Refers to a molecule that is A “polar liquid” is a liquid that includes one or more polar components.

As used herein, the terms “activate” and “activation” refer to the continuous rupture of the external phase of an emulsion and the release of its internal phase.

All percentages, ratios and proportions used herein are by weight unless otherwise indicated.

B. Representative Article Structure FIG. 1 shows a presently preferred embodiment of a cleansing article according to the present invention. More specifically, the cleansing article 1 shown in FIG.
A first second web 3 circumferentially associated with the activation web 2 to define an interior zone 4;
It comprises a multi-phase multi-component emulsion 5 occupying at least partly an internal zone 4.
The second second web 3 'forms the other side of the wipe in the final shape wipe. The activation web 2 and the first second web 3 are preferably substantially unbonded inside their perimeter and relatively move laterally to some extent in response to externally applied shear forces. Can be. This will be described in more detail later.

As used herein, the term “activated web” refers to a web of sheet-like material that is structured to provide activation properties when utilized in direct contact with a multi-phase, multi-component emulsion during use. By activating properties is meant that the activated web acts to burst the outer phase of the emulsion and release the inner liquid phase. This allows at least one of the emulsion phases (preferably the liquid internal phase) to be transferred from the article. On the other hand, "second web" refers herein to another face or member of the cleansing article according to the present invention, which may be any of (i) direct contact during use with the multi-phase multi-component emulsion, (ii) activation properties. Or lack both.

The multi-phase multi-component emulsion 5 may be provided in the form of a uniformly distributed layer,
Alternatively, it may be applied locally or in a strip shape as shown in FIG. The multi-phase multi-component emulsion may be applied as one single deposition, may be applied gradually as a number of thin layers, or may be applied locally instead of simultaneously. The emulsion is preferably applied to at least one of the activated web or the second web before assembling the article. However, other means of introducing the emulsion into the article are intended to be within the scope of the present invention. In particular, the web to which the emulsion is first applied is sometimes referred to as a "carrier web" for purposes of describing the method and apparatus for making articles according to the present invention.

The individual members or components of the cleansing article shown in FIG. 1 are described in more detail in the sections below.

C. Composition of the Multi-Phase Multi-Component Emulsion The article according to the invention comprises an emulsion to be applied to a carrier support. The emulsion comprises (1) a lipid phase, (2) an internal polar phase dispersed in the lipid phase, (3)
An emulsifier that forms an emulsion when the lipid phase is liquid. In particular, the emulsion comprises: (1) a continuous solidified continuous lipid phase comprising about 2 to about 60%, a waxy lipid material having a melting point of about 30 ° C. or higher; (2) about 39 to 97%, An internal polar phase dispersed in a lipid phase; and (3) an effective amount of an emulsifier capable of forming an emulsion when the lipid layer is in a fluid state.

Because the internal phase contains high levels of one or more polar liquids, this emulsion is typically referred to as a “high internal phase inverse emulsion”. The continuous lipid phase is very fragile at ambient temperature, so that if subjected to small shear stresses during use, for example when wiping the skin or other surfaces, the emulsion will burst and release the internal polar phase.

Also, the continuous lipid phase must be stable at ambient temperature in order to stabilize the emulsion structure of the present invention. In particular, the continuous lipid phase prevents premature release prior to use of the dispersed internal polar phase article, eg, during severe processing.

The continuous lipid phase can make up about 2 to about 60% of the emulsion according to the invention. Preferably, the continuous lipid phase comprises about 5 to about 30% of the emulsion.
Is configured. Most preferably, this lipid phase comprises about 6 to about 15% of the emulsion.

The main component of this continuous lipid phase is a waxy lipid material. This lipid material has the property of having a melting point above about 30 ° C., ie, it is solid at ambient temperature. Preferably, the melting point of the lipid material is about 40 ° C or higher, more preferably about 50 ° C or higher. Typically, the melting point of the lipid material is in the range of about 40 ° C to about 80 ° C, more typically in the range of about 50 ° C to about 80 ° C, and even more preferably, about 60 ° C to about 70 ° C. It is in the range of ° C.

[0027] The lipid material is solid at ambient temperature and fluid or plastic at the temperature at which the high internal reversal emulsion is applied to the carrier support. The lipid material should also be stable for extended periods of time at high temperatures (eg, above about 50 ° C.) normally encountered during storage or distribution of the articles of the present invention (ie, minimal coalescence of the emulsion droplets). Is preferred. Also, the lipid material must be sufficiently brittle under shear conditions during use of the article to burst and release the dispersed internal polar phase. Also, these lipid materials should preferably provide a good feel to the skin when used in personal care products such as wet cleansing wipes used in perianal cleaning.

[0028] Suitable lipid materials for use in the high internal phase inverse emulsion according to the present invention include natural and synthetic waxes as well as other oil-soluble substances having a waxy consistency. As used herein, the term "wax" refers to an organic mixture or compound that is generally water-insoluble and tends to exist as an amorphous or microcrystalline solid at ambient temperature (eg, about 25 ° C). Suitable waxes include esters of certain fatty acids (eg, saturated triglycerides) with fatty alcohols, as well as various types of hydrocarbons. These can be obtained from natural sources (ie, animal, vegetable, or mineral) or can be synthesized. These various waxy mixtures can also be used.

Representative animal or vegetable waxes that can be used in the present invention include beeswax, Brazilian wax, spermaceti, lanolin, shellac wax, candelilla wax, and the like. Particularly preferred animal and vegetable waxes are beeswax, lanolin, and candelilla.
Representative waxes from mineral sources that can be used in the present invention include petroleum waxes such as paraffin, petrolatum and microcrystalline wax, and fossil or earth waxes such as white selecin wax, yellow selecin wax, white ozokerite ) Wax etc. are included. Particularly preferred mineral waxes are petrolatum, microcrystalline wax, yellow ceresin wax, and white ozokerite wax. Representative synthetic waxes that can be used in the present invention include ethylene polymers such as polyethylene wax, chlorinated naphthalenes such as "Halowax", hydrocarbon type waxes made by Fisher-Tropsch synthesis, and the like.
A particularly preferred synthetic wax is a polyethylene wax.

[0030] In addition to the waxy lipid material, the continuous lipid phase may contain small amounts of other lipophilic or lipid-miscible substances. These other lipophilic / lipid-miscible substances are typically included to stabilize the emulsion and minimize loss of the internal polar phase or improve the feel of the emulsion to the skin. Suitable materials of this type that can be present in the continuous lipid phase include hot melt adhesives such as Findley 193-336 resin,
Long-chain alcohols such as cetyl alcohol, stearyl alcohol, and cetaryl alcohol, water-insoluble soaps such as aluminum stearate, silicone polymers such as polydimethylsiloxane, hydrophobically modified silicone polymers such as phenyltrimethicone, and the like are included. Other suitable lipophilic /
Lipid-miscible substances include polyol polyesters. By "polyol polyester" is meant a polyol having at least four ester groups. By "polyol" is meant a polyhydric alcohol containing at least 4, preferably 4 to 12, most preferably 6 to 8, hydroxyl groups. Polyols include monosaccharides, disaccharides, and trisaccharides, sugar alcohols, and other saccharide derivatives (eg, alkyl glycosides), polyglycerols (eg, diglycerol and triglycerol), pentaerythritol, and polyvinyl alcohol. . Preferred polyols include xylose, arabinose, ribose, xylitol, erythritol, glucose, methyl glucoside,
Includes mannose, galactose, fructose, sorbitol, maltose, lactose, sucrose, raffinose, and maltotriose. Sucrose is a particularly preferred polyol. With respect to the polyol polyesters useful for use herein, not all hydroxyl groups of the polyol need be esterified. However, the disaccharide polyester must have no more than 3, and more preferably no more than 2, unesterified hydroxyl groups. Typically, substantially all (eg, at least about 85%) of the hydroxyl groups of the polyol are esterified. In the case of sucrose polyester, typically about 7 to 8 hydroxyl groups of the polyol are esterified.

“Liquid polyol polyester” means the group of polyol polyesters described above that has a liquid consistency at about 37 ° C. or less. "
"Solid polyol polyester" means a group of the above polyol polyesters that has a plastic or solid consistency at about 37 ° C or higher. Liquid and solid polyol polyesters can be successfully utilized in the emulsions of the present invention as emollients and immobilizing agents, respectively. In some cases, solid polyol polyesters also provide some emollient function.

Typically, the major component of the high internal inverse emulsion of the present invention is a dispersed internal polar phase. This internal phase can provide many different benefits when released. In a preferred embodiment, the polar phase contains a significant proportion of water. For example, in a preferred wet cleaning wipe for cleaning around the anus, the internal polar phase contains significant levels of moisture. This released internal water phase gives these wipes the main cleansing action. In these preferred embodiments, the polar phase comprises a significant proportion of water, preferably at least about 60%, more preferably at least about 75%, even more preferably at least about 85% by weight of the internal polar phase is water. is there.

The internal polar phase can make up about 39 to about 97% of the emulsions of the present invention. Preferably, the internal polar phase comprises from about 67 to about 92% of the emulsion.
Is configured. Most preferably, this polar phase comprises about 82 to about 91% of the emulsion.
Is configured.

In a preferred embodiment where the internal phase contains significant amounts of water, the internal polar phase comprises
Other water-soluble or dispersible materials that do not adversely affect the stability of the high internal reciprocal emulsion may be included. One such material typically included in the internal water phase is a water-soluble electrolyte. The dissolved electrolyte minimizes the tendency of materials present in the lipid phase to also dissolve in the water phase. Any electrolyte that can impart ionic strength to the water phase can be used. Suitable electrolytes include water-soluble monovalent, divalent, or trivalent inorganic salts such as water-soluble halides (eg, alkali metal and alkaline earth metal chlorides, nitrates, and sulfates).
Examples of such electrolytes include sodium chloride, calcium chloride, sodium sulfate, magnesium sulfate, and sodium bicarbonate. The concentration at which the electrolyte is included is typically about 1 to about 20% of the water phase.

Other water-soluble or dispersible materials that can be present in the internal water phase include thickeners and viscosity modifiers. Suitable thickeners and viscosity modifiers include water-soluble polyacrylic and hydrophobically modified polyacrylic resins such as Carbopol
And Pemulen, starches such as corn starch and potato starch and tapioca, gums such as guar gum and gum arabic, cellulose ethers such as hydroxypropylcellulose and hydroxyethylcellulose and carboxymethylcellulose. These thickeners and viscosity modifiers are typically included at a concentration ranging from about 0.05 to about 0.5% of the water phase.

Other water-soluble or dispersible materials that can be present in the internal water phase include polycationic polymers to provide steric stabilization to the water-lipid interface, and also stabilize water-in-lipid emulsions. A nonionic polymer. Suitable polycationic polymers include Reten201, Kymene ^R 557H and Acco711.
Suitable nonionic polymers include polyethylene glycol (PEG) such as Carb
owax included. These polycationic and nonionic polymers are typically included at a concentration ranging from about 0.1 to about 1.0% of the water phase.

In addition to or instead of containing moisture, the internal polar phase may include polar materials such as: Solvents such as ethanol and isopropanol and butanol and hexanol, glycols or substituted glycols such as propylene glycol and butylene glycol and 2,2,4-trimethylpentane-1,3-diol or hexylene glycol, polyglycols such as diethylene glycol or triethylene glycol , Glycol ethers such as oxyethylene glycol and short chain (eg C ₁ -C ₆ ) derivatives of oxypropylene glycol such as mono- and di-ethylene glycol n-hexyl ethers and mono-, di- and tri-propylene glycol n-butyl ether Such. Further, a solvent such as tetrahydrofuran, dimethyl sulfoxide, acetone, and the like may be contained in the internal polar phase.

Another major component of the high internal phase inverse emulsion of the present invention is an emulsifier. The emulsions of the present invention contain an effective amount of an emulsifier. What constitutes an "effective amount" depends on many factors, including: For example, factors such as the respective amounts of the lipid and internal polar phase components, the type of emulsifier used, and the level of impurities present in the emulsifier. Typically, the emulsifier comprises about 1 to about 1 of the emulsion.
Make up 0%. Preferably, the emulsifier comprises about 3 to about 6% of the emulsion. Most preferably, the emulsifier comprises about 4 to about 5%. Although this component is described using a single “emulsifier”, multiple emulsifiers may be used when forming an emulsion. In fact, as described below, when using certain materials, it may be preferable to use both primary and secondary emulsifiers. Without intending to limit the scope of the invention, when two emulsifiers are used, preferably the primary emulsifier comprises about 1 to about 7% by weight of the emulsion, more preferably about 2 to about 5% by weight, Most preferably it comprises about 2 to about 4% by weight. The secondary emulsifier comprises about 0.5 to about 3% by weight of the emulsion, more preferably about 0.75%.
From about 0.7% to about 1.5%, most preferably from about 0.75% to about 1.5% by weight.

The emulsifier should be substantially miscible with the lipid soluble or lipid phase material, especially at the temperature at which the lipid material melts. Also, the HLB value of the emulsifier must be relatively low to promote the formation of the required reverse emulsion. Emulsifiers suitable for use in the present invention have HLB values typically in the range of about 2 to about 5, and may include mixtures of different emulsifiers. Preferably, the HLB of these emulsifiers
Values range from about 2.5 to about 3.5.

Emulsifiers suitable for use in the present invention include silicone polymer emulsifiers such as alkyl dimethicone copolyols (eg, Dow Corning Q2-5200 lauryl methicone copolyol). Such emulsifiers are described in detail in co-pending U.S. Patent Application 08 / 430,061 filed by L. Mackey on April 27, 1995 (case 5653). This document is incorporated herein by reference.

Other suitable emulsifiers are described in co-pending US patent application Ser. No. 08 / 336,456 (L. Mackey et al.
This is described in the application filed on November 9, 1994 (case 5478). This document is incorporated by reference herein. The emulsifiers described in the literature include certain sorbitan esters, preferably sorbitan esters of C ₁₆ -C ₂₂ saturated, unsaturated or branched fatty acids. Due to the manner in which they are usually produced, these sorbitan esters usually include a mixture of mono-, di-, tri-, etc. esters. Representative examples of suitable sorbitan esters include sorbitan monooleate (eg, SPAN ^R 80), sorbitan sesquioleate (eg, A
rlacel ^R 83), sorbitan monoisostearate (for example CRILL ^R 6 manufactured by Croda), sorbitan stearate (for example SPAN ^R 60), sorbitan trioleate (for example SPAN ^R 85), sorbitan tristearate (for example SPAN ^R 65), and sorbitan dipalmitate (eg, SPAN ^R 40). Lauryl methicone copolyol is a particularly preferred emulsifier for use in the present invention. Other suitable emulsifiers described in the literature include certain glyceryl monoesters, preferably glyceryl monoesters of C ₁₆ -C ₂₂ saturated, unsaturated or branched fatty acids, such as glyceryl monostearate, glyceryl monoester. palmitate, and glyceryl monobehenate, certain sucrose fatty acid esters, preferably saturated C ₁₂ -C _22, unsaturated and sucrose esters of branched chain fatty acids such as sucrose tri Au rate and sucrose distearate (e.g., Crodesta ^R F10), and saturated C ₁₆ -C _22, contains certain polyglycerol esters such as diglycerol monooleate and tetraglycerol monooleate unsaturated or branched fatty acids.

In addition to these primary emulsifiers, they also have water-in-lipid emulsion stability.
A co-emulsifier may be used for the purpose. Suitable co-emulsifiers include:
You. Phosphatidylcholine and phosphatidylcholine-containing compositions such as reti
Syn, long chain C₁₆-C_{twenty two}Fatty acid salts such as sodium stearate, long chain C₁₆-C _{twenty two} Diariphatic, short chain C₁-C_FourDialiphatic quaternary ammonium salt
For example, ditallow dimethyl ammonium chloride and ditallow dimethylan
Monium methyl sulfate, long chain C₁₆-C_{twenty two}Dial coil (dialkenoyl)
-2-hydroxyethyl, short chain C₁-C_FourDialiphatic quaternary ammonium
Salts such as ditallow oil-2-hydroxyethyldimethylammonium chloride
Id, long chain C₁₆-C_{twenty two}Dialiphatic imidazolinium quaternary ammonium
Salts such as methyl-1-tallowamidoethyl-2-tallowimidazolinium methyl
Rusulfate and methyl-1-oleylamidoethyl-2-oleylimida
Zolinium methyl sulfate, short chain C₁-C_FourDiariphatic, long chain C₁₆−
C_{twenty two}Monoaliphatic benzyl quaternary ammonium salts such as dimethyl
Allylbenzylammonium chloride, and synthetic phospholipids such as steara
Midopropyl PG-dimonium chloride (phospholipid PTS from Mona Industries). Interfacial tension modifiers for more tightly packing at the water-lipid interface
For example, it may contain cetyl and stearyl alcohol.

Other emulsifiers useful in making the articles of the present invention include co-pending US patent application Ser.
No./640,268 (filed by L. Mackey and B. Hird on Apr. 30, 1996). This document is incorporated herein by reference. These emulsifiers preferably have a viscosity of at least about 500 centipoise at 55 ° C. (viscosity can be measured using a rotating disk viscometer of Lab-Line Instruments Brookfield-type). This application contains Lubrizol Corporati
It describes the use of emulsifiers such as those shown on (Wickliffe, Ohio) as OS-122102, OS-121863, OS-121864, OS-80541J, and OS-80691J. These are the reaction products of (i) hydrocarbyl-substituted carboxylic acids or carboxylic anhydrides (preferably polyisobutylene-substituted succinic or succinic anhydrides) with (ii) amines or alcohols. To form an ester or amide product. The material and its method of manufacture are described in U.S. Pat.
No. 3 (granted to Forsberg on November 24, 1987) (see especially column 3, lines 32-38, and column 8, line 10-column 26, line 68), and US Pat. No. 4,844,756 (July 1989).
Granted to Forsberg on April 4). Both documents are incorporated herein by reference.

Other materials that may be useful in the present invention include hydrocarbon-substituted succinic anhydrides such as those described in the following references. U.S. Patent 3,215,707 (November 2, 1965
U.S. Pat. No. 3,231,587 (granted to Rense on Jan. 25, 1996), U.S. Pat.
(Published by Forsberg on June 18, 1987). All of these references are incorporated herein by reference.

In addition, other materials useful as emulsifiers, especially as co-emulsifiers with high viscosity primary emulsifiers, are the AB of 12-hydroxystearic acid and polyethylene oxide.
A block copolymer. Such materials are disclosed in U.S. Patent 4,875,927 (1989
(Granted to T. Tadros on 0/24). This document is incorporated herein by reference. A representative material of this class useful as an emulsifier herein is available as Arlacel P135 from Imperial Chemical Industries PLC.

As already mentioned, all of the above materials may be used as a single emulsifier, but it may be preferable to use more than one emulsifier when forming the emulsion. In particular, when high viscosity emulsifiers are used, some "sticky" feel may occur when the treated article is subjected to in-use shear pressure that breaks the emulsion. In this case, it may be preferable to use a co-emulsifier having a relatively low viscosity together with the primary emulsifier to reduce the use amount of the main emulsifier so that the sticky feeling can be reduced. In one embodiment of the present invention is an ABA block copolymer of primary emulsifier available from Lubrizol (i.e., the reaction product of a polyisobutylene-substituted succinic acid with an amine) and poly-12 hydroxystearic acid and polyethylene oxide. Secondary emulsifiers (for example, Ilace's Arlacel P13
5) results in an emulsion having a beneficial reduced stickiness (due to a reduced level of primary emulsifier) with a beneficial level of water retention over time. Those skilled in the art will appreciate that various desired end uses and product designs will determine whether multiple emulsifiers are suitable, and if so, the appropriate relative amounts of each. . Such a determination requires only routine experimentation in light of the present disclosure by those skilled in the art.

The high internal reversal emulsion of the present invention may also include other optional components typically present in this type of water-containing emulsion. These optional ingredients may be present in either the continuous lipid phase or the internal polar phase to provide perfume, antimicrobial
l) (eg antibacterial) active agents, pharmaceutically active agents, deodorants,
Opacifiers, astringents, skin conditioners, cosmetics, detergents, surface conditioners, insect repellents, pH buffers and the like, and mixtures of these components, may also be included. All of these materials are well known in the art as additives to such formulations and can be used in the emulsions of the present invention in effective and suitable amounts. A particularly preferred optional ingredient contained in the emulsion of the wet cleansing wipe according to the present invention is glycerin as a skin conditioning agent.

As used herein, the emulsion component of the articles of the present invention is referred to as the component (ie,
Lipid phase components, internal polar phase components, emulsifier components, etc.) and corresponding amounts of these components present after emulsion formation. That is, when a stable emulsion is formed and applied to the carrier. But,
The description (components and amounts) of emulsions also includes emulsions formed by combining the described components at the described levels, regardless of the chemical substance of the components after emulsification and application to a carrier. Understood.

D. Activated Web In the present invention, the cleansing article also comprises a sheet-like material that forms an activated web that aids in the release of liquid from the multi-phase, multi-component emulsion when "activated" by the user.

It has been found that the combination of two physical properties enhances the effectiveness of such cleansing articles to “activate” a multi-phase multi-component emulsion. That is, by improving the extent to which the continuous phase of the emulsion is destroyed, and by improving the delivery of the active portion of the emulsion from within the article to an outer surface that can be effectively utilized for its intended function. By.

One of the properties that has been found to be important in the activated web of the present invention is the texturing of the activated web on the side (or a portion thereof) that directly contacts the multi-phase, multi-component emulsion during use. Surface. What is meant by "textured" is that the web surface has a spread beyond the two-dimensional plane defined by the macroscopic web. In other words, the activated web has a three-dimensional surface. While not intending to be bound, Applicants have noted that such surfaces provide some abrasiveness to the web surface to disrupt the continuous external lipid phase and release the internal liquid phase from the emulsion. It has been hypothesized to help provide frictional activation properties. Appropriate choice of activated web material and surface geometry can provide varying degrees of polishing. However, the activated web is preferably of sufficient relative strength between the activated web and the optional second web overlying it to impart a shearing action to the multi-phase emulsion and assist in the release of the internal liquid phase. Lateral movement must be possible.

Another property that has been found to be important in the activated webs of the present invention is resilience. The activated web according to the invention has a resilience property that allows the web to maintain its textured or three-dimensional properties during activation of the emulsion, at least corresponding to the typical use time of the article. Have to show for the time you do. For the purposes of the present invention, the resilience of an activated web is described by its wet thickness to dry thickness ratio (hereinafter referred to as "resilience ratio"). Wet resilience is measured according to the procedure described in the Test Methods section below. The activated web of the present invention has a resilience ratio of at least about 0.9. Preferably, the resilience ratio of the activated web is at least about 0.5.
95, more preferably at least about 0.98. As mentioned above, the activated web must have the required resilience ratio for a time corresponding to the typical use time of the article. That is, the activated web need not indicate the required resilience ratio indefinitely. As described below, in some embodiments, the activated web comprises a synthetic material (eg, a polymer network) printed on a cellulosic material. The cellulosic element of the activation member collapses to some extent when wet (ie, "
Although it may be (not "resilient"), it is clear that the polymer network maintains its three-dimensional, textured properties and results in the activation of the preferred emulsion. In such an embodiment, the resilience ratio is adjusted so as to eliminate the resilience that decreases due to only the cellulose element.

In addition to providing abrasive properties through the textured surface and exhibiting the required resilience ratio, the textured activated web is in direct contact with the multi-phase, multi-component emulsion during use. The surface preferably provides a significant amount of inherent void volume that can be utilized by the emulsion. This void volume provides confinement space to capture and hold the solid phase of the emulsion during the activation process as it separates from the activated liquid phase, so that this portion of the emulsion is And / or do not leave the cleansing article away from soiling the outer surface during use.

Another property that has been found to impart optional desirable properties to the cleansing article according to the present invention is transparency. In the present invention, the activated web need not be permeable, at least to the liquid forming the multi-phase multi-component emulsion, and may in fact be liquid-impermeable. In such embodiments, the activated web forms a barrier to ensure that the released liquid remains on one side of the activated web. However, a liquid-permeable activated web allows the liquid to penetrate the activated web and wet the outer layers of the article on opposing sides of the activated web, depending on the overall structure of the cleansing article, to achieve the desired application. Can be offered.

In the case of a permeable activated web, an additional property that may be preferred for certain applications is capillary action. Given the liquid properties of certain liquid components of a multi-phase multi-component emulsion, the activated web comprises a liquid passage extending from one surface to the other, acting as a capillary structure for the particular liquid utilized. May be. That is, the activated web may provide a preferential liquid flow direction that directs liquid from one side of the activated web to the other side of the activated web. Such liquid propulsion also tends to impede the flow of liquid in the opposite direction. Such capillary properties can be used for various functions. For example, a one-sided cleansing article can be provided in which one side is wetted by a liquid to provide an active cleansing surface, while the other side is substantially not wetted by the liquid therein.

Further, it has been found preferable to utilize an activated web comprising a thermoplastic material. Such a material is not essential to the invention, but is a further advantage in addition to the advantages provided by the non-thermoplastic material, i.e., by providing such a web with other components of the cleansing article, such as a non-thermoplastic second component. On the web,
This results in a material that can be easily thermally bonded without the use of adhesives and other adhesives.

One suitable material for use in the present invention includes a macroscopically expanded three-dimensional formed film web of a polymeric material such as polyethylene, polypropylene, or other suitable material for the emulsion. Included as a carrier. A molded film provided with an opening is permeable to liquid but non-absorbable,
It is also preferable because the liquid tends to preferentially flow in one direction. Suitable molded films are described in the following documents. U.S. Patent 3,929,135 (granted to Thomson on December 30, 1975); U.S. Patent 4,324,246 (granted to Mullane et al. On April 13, 1982);
U.S. Patent 4,342,314 (granted to Radel et al. On August 3, 1982); U.S. Patent 4,463,045 (198
4,637,819 (Granted to Ouellette et al. On January 20, 1987)
And US Patent 5,006,394 (granted to Baird on April 9, 1991). Each of these patents is incorporated herein by reference. Other suitable formed films include hydroformed films such as those disclosed in U.S. Pat. No. 4,629,643 (Curro et al., Issued Dec. 16, 1986) and U.S. Pat. Are included. Both documents are also incorporated herein by reference. The formed film preferably has a fine opening.

FIG. 2 is an enlarged, partially sectioned, perspective view of a particularly preferred embodiment of a macroscopically expanded three-dimensional fiber-like liquid-permeable polymer web 40 provided with openings. Web 40 generally follows the teachings of commonly assigned U.S. Pat. No. 4,342,314 (assigned to Radel et al., 1982) which has been found to be suitable for use as a topsheet in absorbent articles. The term "macro-expanded" when used to describe the three-dimensional plastic web of the present invention conforms to the surface of a three-dimensional formed structure, both surfaces of which are macroscopic cross-sections of the formed structure. Of surface aberration corresponding to 3
Refers to webs, ribbons, and films that exhibit a dimensional forming pattern. The surface aberrations that make up the pattern individually change the apparent size or distance of the object, or otherwise the visual acuity of the eye, when the vertical distance between the viewer's eye and the web plane is about 12 inches. Can be identified by a normal naked eye without the aid of a device that changes the eye, i.e. a normal naked eye with a vision of 20/20. The term "fiber-like"
As used herein to describe the appearance of the plastic web of the present invention,
Any random or non-random, reticulated or non-reticulated, fine-grained openings, usually including the overall appearance and impression of a woven or non-woven fibrous web when viewed by the human eye Also refers to patterns.

As can be seen in FIG. 2, the fibrous appearance of the web consists of a continuum of fibrous elements, the opposite end of each fibrous element being connected to at least one of the other fibrous elements. are doing. In the embodiment disclosed in FIG. 2, the connected fiber-like elements form a network of pentagon-shaped capillaries 41 in a pattern. Web 4 with fiber-like appearance
0 from the first surface 42 of the web in plane 43 to its second surface 4 in plane 45
4 to form a three-dimensional microstructure. This microstructure allows the absorbent article to have a first surface 4 of the web without lateral transmission of liquid between adjacent capillaries 41.
Used to facilitate rapid liquid transport from the second to the second surface 44. As used herein, the term "microstructure" refers to a microscopic structure whose exact details are readily perceived by the human eye when magnified by a microscope or other means well known in the art. .

The opening 47 in the first surface 42 is formed by a plurality of intersecting fiber-like elements, such as elements 48, 49, 50, 51, and 52, interconnecting at the body-facing surface of the web. . Each fiber-like element comprises a base, for example a base 54 located in the plane 43. Each base portion 54 has a side wall portion, for example, a side wall portion 56 attached to each edge of the base portion. The side wall portions 56 typically extend in the direction of the second surface 44 of the web. The intersecting sidewalls of the fiber-like elements connect to each other in the middle of the first and second surfaces of the web and substantially simultaneously with each other at the plane 4 of the second surface.
Ends with 5.

In the particularly preferred embodiment shown in FIG. 2, the interconnecting side wall portions 56 terminate at substantially the same time each other at the plane 45 of the second surface 44 to form an opening 58 in the second surface 44 of the web. I have. Side wall 56 interconnecting between openings 47 and 58
The network of capillaries 41 formed by the webs from the highest surface of the web directly to the lowest surface of the web without laterally transferring liquid between adjacent capillaries.
It allows liquids to be transported freely.

The base portion 54 may include a fine pattern of surface aberrations 60 generally in accordance with the teachings of commonly assigned US Pat. No. 4,463,045 (given to Ahr et al. . When used in a viewable configuration, upon incidence of incident light on web 40, the fine pattern of surface aberrations 60 provides a substantially matte visible surface.

When utilized as the activated web shown in the embodiment of FIG. 1, the formed film web of FIG. 2 is brought into direct contact with the first surface 42 towards the multi-phase multi-component emulsion 5,
May be used. However, it is presently preferred to use the second surface 44 as a surface that will directly contact the emulsion during use. In such a configuration,
The three-dimensional properties of the formed film having irregularly torn openings 58 on the second surface result in enhanced polishing properties compared to the first surface, thus providing enhanced activation properties according to the present invention.

Thus, such a material, when used as an activated web according to the present invention,
(I) on the side of the material which first comes into direct contact with the multi-phase multi-component emulsion during use,
Gives three-dimensional surface topography, and (ii) 3 that can be used by the emulsion
Dimensional void volume, (iii) wet elasticity, (iv) a capillary structure, and (v) a heat-sealable material useful in assembling cleansing articles.

Other than utilizing a thermoplastic film as the activated web, the liquid delivery properties of the article can be improved by modifying the relatively untextured web to significantly increase the amount of texture in contact with the emulsion. May be improved.
One particular way to modify such an untextured web is to print a more textured member on a relatively untextured web. The component to be printed may extend over the entire surface in contact with the emulsion or only a part of the surface. Possible embodiments include, for example, printed polymer networks, unbound particles or particles attached to a support, printed polymer "hooks", which are described in detail in the following references: ing. U.S. Patents 5,230851, 5,318,741, 5,058,247, 5,
116,563, 5,180,534, 5,540,673, 5,326,415, 5,325,569, 5,392,498, 5,300,05
8, 5,385,706, 5,397,317, and 5,586,979. Each disclosure is incorporated herein by reference. It will be appreciated by those skilled in the art that utilizing this technique for any of a variety of supports can increase the overall resilience ratio of the material and the overall texture in contact with the emulsion. For the purposes of this invention, any of the modified webs described herein require modification of the wet resilience ratio calculation as described in the Test Methods section below.

In one particular such embodiment, the activated web is provided with a support (eg, a cellulose support) in a predetermined bonding pattern to provide the support with textured three-dimensional regions. ) May be in the form of a polymer network printed on the polymer. An embodiment of such an activated web is shown in FIG.
As schematically shown. Web 200 has a polymer thereon (shown as 110).
Is provided with a support 114 printed thereon.

In this preferred embodiment, the adhesive 110 is applied to the support 114 by screen-printing the adhesive in a lattice pattern schematically shown in FIG. A preferred screen for this embodiment is a 40 mesh galvano screen manufactured by Rothtec Engraving Corp. (New Bedford, Mass.). One suitable adhesive is a hot melt adhesive commercially available as H1382-01 from Ato-Findley Adhesives (Wauwatosa, Wis.). A suitable screen printer is sold by ITW Dynatec as Model SP-117.

The adhesive is preferably water-insoluble so that the printed structure retains its geometrical original state when wet. The pressure-sensitive adhesive is preferably resistant to a surfactant. “Resistant to surfactants” means that the bonding properties of the pressure-sensitive adhesive are not deteriorated by the presence of the surfactant. Suitable adhesives include:
An EVA (ethylene vinyl acetate) hot melt adhesive is included.

Further, in FIG. 3, a hot-melt pressure-sensitive adhesive is used as a support (for example, a cellulose layer).
114 may be applied in a continuous mesh structure defining a plurality of discontinuous unbonded regions. In one preferred embodiment illustrated, the adhesive is applied as parallel lines spaced in a first direction and then parallel lines spaced in a second direction that intersect those lines. To be applied. The intersecting lines define an unbonded area of the diamond pattern in the activated web.

E. Second web The article of the present invention may comprise one or more second webs. The web or sheet material useful in the present invention as a second web containing a multi-phase multi-component emulsion in conjunction with an activated web (shown in FIG. 1) prior to use can take a variety of support shapes. Suitable supports include woven, non-woven, foam, sponge, wadding,
Balls, puffs, films, etc. are included. Particularly suitable supports for use in the present invention are non-woven types. Supports for these nonwovens include suitable basis weights, calipers (
Any nonwoven sheet or web conventionally made having thickness, absorbency, and strength properties is included. The nonwoven substrate is a product of bonded fibers or filaments having a web structure, wherein the fibers or filaments are randomly distributed in an "air lay" or some "wet lay" process, or a certain "wet lay" process. It can generally be defined as a product that is distributed with an angular orientation in a "wet lay" or "card" process. The fibers or filaments of such nonwoven support can be natural (eg, wood pulp, wool, silk, jute, hemp, cotton, linen, sisal, or ramie) or synthetic (eg, rayon, cellulose ester, polyvinyl derivative, (Polyolefin, polyamide, or polyester), or may be bonded together using a polymer binder resin. Examples of suitable commercially available nonwoven support, those sold under the trademark Sontana ^R from Dupont, and include those from James River Corp. sold under the trademark Polyweb ^R.

For reasons of cost, ease of manufacture, and disposability of the article (eg, ease of flushing with water), a preferred type of nonwoven support used in the wipes of the present invention is made from wood pulp fibers. , Ie, the paper web. As mentioned above, paper webs can be made by either air lay or wet lay techniques. Airlay paper webs such as Air Tex ^R SC130 are commercially available from James River Corp.

More conventionally, paper webs are made by a wet lay method. In such a method, the web is formed into an aqueous papermaking furnish, and the furnish is deposited on a perforated surface, such as a fourdrinier, to remove moisture from the furnish. It can be made with or without pressing, for example by gravity, by vacuum-assisted drying and / or by evaporation, to form a paper web of the desired fiber density. Often, the papermaking equipment is reconfigured to rearrange the fibers in the papermaking stock slurry as dewatering proceeds to form a paper support of particularly desirable strength, feel, bulk, appearance, absorbency, etc. to set up.

The papermaking furnish utilized to form the preferred paper web support for the articles of the present invention essentially comprises an aqueous slurry of papermaking fibers (ie, papermaking pulp), and is optionally broad. Range of chemicals such as wet strength resins, surfactants, p
It may contain an H control agent, a softener, a release agent, and the like. Wood pulp is all its variants
(variation) can be used to form papermaking stock. Wood pulp useful herein includes both sulphite and sulphate pulp, as well as mechanical, thermomechanical, and chemithermomechanical pulp, all of which are well known to those skilled in the papermaking art. Pulp from both deciduous or coniferous trees can be used. Preferably, the papermaking furnish used to form the preferred paper web support for the wipes of the present invention includes kraft pulp obtained from northern softwood.

A number of papermaking processes have been developed that utilize papermaking equipment to form particularly useful or preferred fibrous paper webs. Such a shape, bulk, absorbency,
And may provide a paper web characteristic of high strength. One such process involves fabric imprinting, which helps provide a knuckle pattern of high and low density zones in the resulting paper web.
Used in the papermaking process. This type of process, and the papermaking equipment for performing the process, are described in more detail in U.S. Pat. This document is incorporated by reference.

Another papermaking process uses through-drying of a fabric with an impression knuckle raised above the plane of the fabric. These impressions create protrusions in the through-dried sheet and impart the sheet machine widthwise stretch. This type of process is described in European Patent Publication 677,612A2 (published October 18, 1995, by Wendt et al.). The disclosure of this document is incorporated by reference herein.

Another papermaking process that is carried out using more specialized papermaking equipment involves the formation of a clear, continuous network formed by a plurality of “domes” distributed throughout the area of the network on the support. This results in a paper web having regions. Such domes are formed by compressing the initial web formed during the papermaking process into a perforated, warped member. The member has a textured network surface, the surface of the network being formed by a plurality of separate, separate warped conduits within the warped member surface. Processes of this type, and the devices for performing such processes, are described in more detail in the following documents: U.S. Patent 4,
529,480 (Granted to Trokhan on July 16, 1985); U.S. Patent 4,637,859 (Granted to Trokhan on January 20, 1987); and U.S. Patent 5,073,235 (Granted to Trokhan on December 17, 1991). All of these references are incorporated by reference. Another type of papermaking process, and equipment suitable for making a laminated composite paper support for performing this process, is described in US Pat. No. 3,994,771 (issued to Morgan et al. On Nov. 30, 1976). Has been described. This document is incorporated by reference.

Another papermaking process that is carried out using more specialized papermaking equipment is to provide a paper web having a plurality of basis weight regions. Such a process is described in the following documents: US Patent 5,245,025 (Granted to Trokhan et al. On September 14, 1993); US Patent 5,503,715 (Granted to Trokhan et al. On April 2, 1996); US Patent 5,534,326 (Granted to Trokhan et al. On July 9, 1996) . The disclosure of each document is incorporated herein by reference. No. 08 / 886,764 (Nissin)
g, et al., filed July 1, 1997). The disclosure of this document is also incorporated herein by reference. Such a support provides a carrier having regions of higher permeability (ie, regions having a relatively low basis weight) than other regions (ie, regions having a higher basis weight).

[0078] In addition to papermaking fibers, the papermaking furnish used to make these paper web supports may contain other components or other added ingredients that may or may become known in the art. It may have a material. The preferred type of additive depends on the particular end use for which the tissue sheet is intended. For example, wipe products such as toilet paper, paper towels, decorative paper, baby wipes,
And in other similar products, high wet strength is a preferred property. Thus, it is often preferred to add a chemical known in the art as a "wet strength" resin to the papermaking furnish.

A general paper on the types of wet strength resins utilized in the papermaking art can be found in TA
PPI monograph series No. 29 `` Wet Strength In Paper and Paperboard '' (Techni
cal Association of the Pulp and Paper Industry) (New York 1965). The most useful wet strength resins generally have cationic properties. When providing permanent wet strength, polyamide-epichlorohydrin resins are cationic wet strength resins that have been found to be particularly useful. Suitable types of such resins are described in U.S. Patent 3,700,623 (Keim issued October 24, 1972) and U.S. Patent 3,772,076 (Keim issued November 13, 1973). Both documents are incorporated by reference. One source of useful polyamide-epichlorohydrin resins is Hercules, Inc. (Wilmington, Delaware), which sells such resins under the trademark Kymene ^R 557H.

[0080] Polyacrylamide resins have also been found to be useful as wet strength resins. These resins are described in U.S. Patent Nos. 3,556,932 (Coscia et al., Issued January 19, 1971) and 3,556,933 (Williams et al., Issued January 19, 1971). Both documents are incorporated by reference. One commercial sources of polyacrylamide resins is American Cyanamid Co. (Stamford, Connecticut), sells one of the good UNA resin under the mark Parez ^R 631NC.

Still other water soluble cationic resins that have found utility as wet strength resins are urea formaldehyde and melamine formaldehyde resins. The more common functional groups of these polyfunctional resins are nitrogen-containing groups, such as amino and methylol groups that bind to nitrogen. Polyethyleneimine-type resins can also find utility in the present invention. In addition, temporary wet strength resins such as Caldas 10 (manufactured by Japan Carlit), CoBond 1000 (Nati
onal Starch and Chemical Company), and Parez750 (Am
(manufactured by erican Cyanamide Co.) may be used in the present invention. It is to be understood that the addition of compounds such as the wet strength resins and temporary wet strength resins described above to the pulp furnish is optional and not necessary for practicing the present invention.

[0082] In addition to wet strength additives, it is also preferred to include certain dry strength and lint control additives known in the art in the papermaking fibers. In this regard, starch binders have proven to be particularly suitable. Also,
In addition to reducing linting of the paper support, low levels of starch binder provide a modest improvement in dry tensile strength without the stiffness that can result from the addition of high levels of starch. Typically, the starch binder is included in an amount such that it is retained at a level of about 0.01 to about 2%, preferably about 0.1 to about 1%, by weight of the paper support.

In general, suitable starch binders for these paper web supports are characterized by their water solubility and hydrophilicity. While not intending to limit the scope of suitable starch binders, typical starch materials include corn starch,
Includes potato starch and waxy corn starch, industrially known as amioca starch. Amiostarch is particularly preferred. Amiostarch is different from common cornstarch, where common cornstarch contains both amylopectin and amylose, while amiocastarch is completely amylopectin. Unique various characteristics of Amioca starch are described in "Amoica-The St.
arch From Waxy Corn "(HHSchopmeyer, Food Industries, December, 1945, pp
106-108 (Vol. Pp. 1476-1478)).

The starch binder may be in a granular or dispersed form, but a granular form is particularly preferred. The starch binder is preferably well-fired to cause swelling of the granules. More preferably, the starch granules are expanded through fire.
Perform until just before dispersing the starch granules. Such highly expanded starch granules will be referred to as "fully fired". Conditions for general dispersion may vary depending on the size of the starch granules, the crystallinity of the granules, and the abundance of amylose. For example, a fully cooked amioca starch has about 4
% Starch granules at about 190 ° F. (about 88 ° C.) for about 3 hours.
It can be made by heating from 0 to about 40 minutes. Other typical starch binders that can be used include modified cationic starches, such as those modified to have nitrogen-containing groups (including amino and methylol groups attached to nitrogen). It is sold by the National Starch and Chemical Company (Bridgewater, NJ) and is already used as a pulp furnish additive to increase wet and / or dry strength.

F. Other Optional Wiping Ingredients In addition to the high internal reversal emulsion, other optional wipe components may be included in the articles of the present invention to improve the cleaning properties of the article when the internal polar phase of the emulsion is released. There are optional components. Some of these optional components cannot be present in emulsions at significant levels (eg, above 2% of the internal polar phase) because of the possibility of premature rupture of the emulsion. These include various anionic detergent surfactants having relatively high HLB values (eg, having an HLB of about 10 to about 25), such as sodium linear alkyl benzene sulfonate (LAS) or alkyl ethoxy sulfate (AES), and non-ionic detergents. Includes surfactants such as alkyl ethoxylates, alkylamine oxides, alkyl polyglycosides, zwitterionic detergent surfactants, amphoteric detergent surfactants, and cationic detergent surfactants such as cetyltrimethylammonium salt and lauryltrimethylammonium salt . U.S. Patent 4,597,898 (Van der Mee
r, assigned July 1, 1986) (incorporated by reference herein), particularly for representative anionic, nonionic, zwitterionic, amphoteric, and cationic detergent surfactants. See columns 12 to 16. Alternatively, these high HLB detergent surfactants may be separated from the emulsion and applied to or included in the article. For example, an aqueous slurry of these high HLB detergent surfactants may be applied to one side of the carrier support and a high internal reciprocal emulsion may be applied to the other side of the support. During wiping, the emulsion bursts and releases an internal polar phase (eg, water), which in combination with a high HLB detergent surfactant results in improved hard surface cleaning.

Although the description of the invention generally relates to applying a single emulsion to a carrier, it is recognized that two or more different emulsions may be used to make one article. In such an embodiment, the emulsion may have various aspects, such as, but not limited to, the ratio of the inner polar phase to the outer lipid phase, the emulsifier used,
It may vary, for example, in the components used for either or both the internal and lipid phases. The use of multiple emulsions in one article is particularly preferred when two or more components are incompatible with each other, but can each be included in a separate emulsion. Alternatively, the reactants can be placed in separate emulsions if a particular reaction is desired at the time of use. The desired reaction occurs as soon as the emulsion is sheared during use. For example, if bubbling is desired during wiping, a weak acid can be included in the internal polar phase of the first emulsion and bicarbonate can be included in the internal polar phase of the second emulsion. As the emulsion is sheared during use, the reactants react to give the desired foam.

G. Other Embodiments of Cleansing Article In addition to the configuration shown in FIG. 1, the cleansing article according to the present invention may be assembled in various other alternative configurations while retaining the advantages of the present invention.

FIG. 3 shows one such alternative configuration, wherein the cleansing article 1
Is similar to that shown in FIG. 1, but the activation web 2 itself forms the outer surface of the article. In such a configuration, if the activated web is a liquid permeable, eg, the formed film web of FIG. Emulsion can be released. Alternatively, if the activated web is liquid impervious, the article functions as a one-sided cleansing article by allowing the activated emulsion to exit only through the second web.

H. Test Method-Wet Resilience The wet resilience (i.e., the ratio of wet thickness to dry thickness) of the activated web was determined according to the following procedure using the Thwing-Albert Instrument Co. Electronic Thickness Te.
Measure using ster Model II. Prior to testing, samples should be 70 ° Ft and 5 ° C.
Condition for 2 hours at 0% relative humidity.

The dry thickness of the activation is measured using a confining pressure of 95 g / in ² and a 2 inch diameter load foot. The dry thickness is measured on eight samples. The eight thickness measurements are averaged to give an average dry thickness.

Next, each sample is immersed in a distilled water tank for 30 seconds to wet each sample. The sample is then removed from the aquarium and suspended vertically and drained for 5 seconds. The thickness of the wet sample is measured within 30 seconds after removing the sample from the water bath. The wet thickness is measured at the same location where the dry thickness was previously measured. Average 8 wet thickness measurements,
Give the average wet thickness. The ratio of the wet thickness to the dry thickness is a value obtained by dividing the average wet thickness by the average dry thickness.

If the activated web is a composite of multiple layers or materials, it is necessary to calculate the resilience ratio of the individual components for the purpose of this measurement. For the purpose of this calculation, the following definitions are used.

A = initial dry thickness of the entire web b = initial dry thickness of the web far from the emulsion c = initial dry thickness of the web near the emulsion A = initial wet thickness of the entire web B = initial wet thickness of the web far from the emulsion C = Initial wet thickness of the web close to the emulsion where the resilience ratio is defined as A / a and a, A and b, B or c,
Assume that any of C can be measured. For this measurement, b, B, or c, C
Or, it should be understood that one component of the composite web must be removed to facilitate independent measurement of both.

If one component of the composite web cannot be measured after removal from the composite web, the resilience ratio can be calculated using the following equation:

B / b = (AC) (ac) C / c = (AB) (ab) Preparation of a Representative Cleansing Product When preparing a product according to the present invention, a high internal reversal emulsion is first blended. Typically this is done by blending or melting the lipid phase component and the emulsifier together. The particular temperature at which the lipid / emulsifier mixture is heated depends on the melting point of the lipid phase components. Typically, the lipid / emulsifier mixture is mixed at about 60 ° C. to about 90 ° C., preferably about 70 ° C., prior to mixing, blending or otherwise combining with the polar phase components.
Heat to a temperature in the range of from 0 ° C to about 80 ° C. The melted lipid / emulsifier mixture is then blended with the internal polar phase component and then mixed together, typically under low shear conditions, to form an emulsion.

Next, the high internal phase inversion emulsion is applied to a carrier support, for example, a paper web, in a fluid or plastic state at the above-mentioned temperature. Any of a variety of methods for applying fluid or plastic viscosity materials can be used to apply the emulsion. Suitable methods include spraying, printing (flexographic or screen printing), coating (eg, gravure coating), extrusion, or a combination of these application techniques, such as spraying a detergent surfactant onto a paper web followed by detergent treatment. Applying a gravure coating of the emulsion on the resulting web.

The emulsion may be applied to either or both sides of the carrier web or, in the case of a multi-ply web, to the inner surface of the ply. Once the emulsion has been applied to the carrier web, it is allowed to cool and form a solidified, typically discontinuous, coating or film.

[0098] The application of the high internal reversal emulsion to the carrier web is typically after the web has been dried, ie, a "dry web" addition, to the initially formed web. Is the way. Further, the emulsion may be applied unevenly to the web surface. "Non-uniform" means that the amount, distribution pattern, etc. of the emulsion can vary across the surface of the carrier web. As an example, some emulsions on the surface of the carrier web may be more or less, including surface portions that do not have any emulsion.

[0099] The application of the high internal reversal emulsion to the carrier web may be performed at any time after it has been dried. For example, applying the high internal reciprocal emulsion to the paper web surface may occur after it has been creped from a Yankee dryer. Generally, it is preferred to apply the emulsion to the carrier web before unwinding it from the parent roll and winding it onto a smaller finished product roll.

For application of the high internal reversal emulsion of the present invention to a carrier web, the spray coating method is currently preferred. FIG. 5 shows one such preferred method of spraying the emulsion onto the carrier web 10. In FIG. 5, the spray system has a spray head 12 for applying a dispersion spray 14 of the emulsion onto the web 10.

The spray system includes coupling 18 to piston 26 of hydraulic cylinder 22.
It is actuated by an assembly consisting of a ball screw drive 16 connected by a. A portion of the cylinder 22 shown in FIG. 5 is filled with a high internal reversal emulsion indicated by reference numeral 30. The cylinder 22 is heated to keep the emulsion 30 in a fluid or plastic state. Emulsion 30 enters cylinder 22 through four-way coupling 34. The coupling 34 has a line 38 connected to a heated filling port 42. The coupling 34 also has a pressure gauge 50 and a line 46 connected to the spray head 12. Line 38
And there are three valves (shown at 56, 58 and 60) that control the flow of the emulsion in. The spray system shown in FIG.
2 has a line 64 connected to it. Line 64 allows air, indicated generally at 68, to enter the spray head. Line 64 also has a pressure gauge and regulator 72 for controlling and measuring air pressure in the line. Lines 64 and 46 are heated to keep the emulsion in a molten state prior to application to the web.

To fill cylinder 22 with emulsion 30, valves 56 and 60
Is closed and the valve 58 is opened. Activate the ball screw drive 16 to move the piston 2
Move 6 to the left. The emulsion created in cylinder 22 is drawn out of fill port 42 and into cylinder 22 through line 38. In order to supply the emulsion from the cylinder 22 to the spray head 22, the valve 5
8 is closed and valves 56 and 60 are opened. Activate the ball screw drive 16 to move the piston 26 to the right. Thereby, the emulsion 30 is transferred to the cylinder 2
2 and forced into line 46 of coupling 34. The emulsion then passes through a valve 60 into the interior of the spray head 12, where air is drawn in from line 64 to disperse the emulsion and create a dispersed spray 14. Spray 14 is applied to web 10.

FIG. 6 shows an alternative method for applying a high internal reversal emulsion, including a gravure coating system. In FIG. 6, carrier web 1
After unwinding 10 from parent roll 112 (rotating in the direction indicated by arrow 112a), it proceeds around rotating rolls 114, 116, and 118. Rotating roll 1
From 18 the web 110 proceeds to a gravure coating system, shown schematically at 120, where the emulsion is applied to both sides of the web. After leaving the station 120, the web 110 becomes a processed web, indicated at 122. The processed web 122 is advanced to a surface rewinder roll 126 (rotating in the direction indicated by arrow 126a) and then to a final product roll 128 (
(Rotating in the direction indicated by arrow 128a).

Station 120 is a set of heated and connected gravure press 1
30 and 134. The press 130 comprises a small anilox cylinder 138 and a large print plate cylinder 142. Press machine 13
4 also consists of a small anilox cylinder 146 and a large print plate cylinder 150. Anilox cylinders 138 and 146 each have a ceramic or chrome surface, and print plate cylinders 142 and 150 have a relief-patterned rubber, urethane, or photopolymer surface, respectively. These anilox and print plate cylinders are designated by arrows 138a, 142a, 146a, and 150a, respectively.
Rotate in the direction indicated by. As shown in FIG. 6, the print plate cylinder 1
42 and 150 are opposite to each other and the nip area (
154).

The hot, molten (eg, 60 ° C.) emulsion is pumped to these coupled gravure presses 130 and 134 at a constant volumetric flow rate in the nip area indicated by arrows 158 and 162, respectively. Spray (emulsions sent to presses 130 and 134 may be the same or different). In other words, the emulsion is added to the connected gravure presses 130 and 134 at the same flow rate as the emulsion being applied to web 110. This allows for the "build-up" of the emulsion in the system.
p) "is avoided. Anilox cylinders 138 and 146 are indicated by arrows 138
Rotation in the directions indicated by a and 146a acts as a rotating doctor blade to spread the emulsion evenly over the surface of print plate cylinders 142 and 150, respectively, and remove excess emulsion from the print plates of cylinders 142 and 150.

Print plate cylinders 142 and 150 (arrows 142a and 150)
The emulsion spread above (rotating in the opposite direction shown at a) is then transferred to both sides of web 110 at nip area 154. The amount of emulsion transferred to the web 110 can be controlled by: (1) Print plate cylinder 14
Adjusting the width of the nip area 154 between 2 and 150; (2) adjusting the width of the nip areas 158 and 162 between the anilox / print plate cylinder pairs 138/142 and 146/150; (3 ) Cylinders 142 and 150
The print image relief (ie, valley depth) of the upper print plate, (
4) the print area (ie, valley area) of the print plate on cylinders 142 and 150, and / or (6) the print pattern of the print plate on cylinders 142 and 150.

[0107]

【Example】

Example 1 This example illustrates the preparation of a cleaning article with an emulsion contained between two composite activated webs. Activated webs are made by printing a network of polymers on the surface of a cellulosic web. Such an activated web is shown in FIG. The printing of the emulsion on the activated web is such that in the finished article the polymer network is in direct contact with the emulsion.

A) Activated Web (1) Preparation of Cellulose Web The cellulose web portion of the activated web is a tissue paper support.
The base paper is a 100% NSK non-laminated sheet having a basis weight of 20 lbs / ream (about 32.5 gsm). The base paper has a plurality of high basis weight areas and low basis weight areas. Base paper was made according to the teachings of US Pat. No. 5,506,715 (Trokhan et al.) With the following details.

1) The forming wire contained 100 protrusions per square inch.

2) The projection occupied about 50% of the surface area of the forming wire.

3) The protrusion extended to about 0.004 inches above the forming wire reinforcement structure.

4) The opening of each projection occupied about 10% of the surface area of the forming wire.

5) On the wet side of a normal papermaking process, 2% amino silicone (Genera
l Sold as CM22666D1 by Electric) at 0.0
Introduce into the NSK pulp slurry at a rate of 04 pounds of aminosilicone solids.

6) On the wet side of a normal papermaking process, 1% Kymene 2064 (Hercules Inc.
Is introduced into the NSK pulp slurry at a rate of 20 pounds of Kymene solids per ton of dry paper.

(2) Addition of polymer An adhesive polymer is printed on a paper support in a predetermined pattern to provide a textured three-dimensional region on the support. In FIG. 4A, a printed area is indicated by 110, and an unprinted area is indicated by 114. In particular,
In a preferred embodiment, the polymer is applied by screen printing. A preferred screen printer is Model SP-117 from ITW Dynatec. The polymer used is Ato-Fi
EVA hot melt, widely sold as H1382-01 by ndley Adhesives (Wow Watsa, Wisconsin). A preferred screen for this embodiment is a 40 mesh galvano screen manufactured by Rothtec Engraving Corp., New Bedford, Mass. The macroscopic print pattern used is a straight intersecting grid pattern. Straight lines have a width of about 0.0
625 inches and separated from each other by about 0.5 inches. These straight lines are approximately 80
They intersect at an angle of degrees, resulting in isolated diamond-shaped unprocessed areas.

C) Emulsion Preparation A 1000 g batch of the emulsion (88.65% internal phase) is prepared from the ingredients shown in Table 1.

[0117]

[Table 1]

After mixing all the polar phase components together to prepare the internal polar phase,
Heat to ° F (45.8 ° C). Independently, the lipid phase components are mixed for about 1
Heat until melted to a temperature of 40 ° F. Next, the polar and lipid phase components are combined in a stainless steel container and then mixed using a Hobart Model 100-C mixer set at low speed with slow cooling. Mixing is performed until an emulsion is formed. Emulsion formation is manifested by an increase in viscosity, greater than 2000 centipoise as measured using a rotating disk viscometer from Lab-Line Instruments.

D) Application of the Emulsion to the Activated Web The emulsion prepared in step C was subjected to a gravure printing process essentially identical to that shown in FIG. 6, except that only one gravure press (130) was used. To apply to the activated web (and the rewind roll 126 is not used in making the article described in this example). The emulsion is maintained at a temperature of 135 ° F. and is in a liquid or molten state. The emulsion was pumped into the nip area of the gravure press 130 at 380 mL /
Transfer at a constant volumetric flow rate in minutes. An anilox cylinder 138 spreads the emulsion evenly over the surface of the print cylinder 142 (rotating at about 40 feet / minute). Cylinder 142 then transfers the emulsion to one side of web 110 (cylinder 150 is used as a backup to maintain constant impression on web 110).

Next, the coated activated web (ie, polymer network and paper web) is folded so that the emulsion is contained inside the article. The surface of the composite web having a polymer network is also contained inside the article and is in contact with the emulsion. Combining, drilling, and sealing can be performed using techniques known in the art.

Example 2 This example illustrates the preparation of a moisture releasing wipe with an emulsion contained between a second web and an activated web. The activated web consists of a molded film overlaid on a paper web. The emulsion is applied to the molded film side of the laminate. Further processing places the emulsion between the film side of the activated web and the second web, as shown in FIG.

A) Preparation of the Second Web The second web is a tissue paper support. The base paper is a 100% NSK non-laminated sheet having a basis weight of 20 lbs / ream (about 32.5 gsm). The base paper has a plurality of high basis weight areas and low basis weight areas. The base paper is a U.S. Patent 5,50 with the following details:
Prepared according to the teachings of 6,715 (Trokhan et al.).

1) The forming wire contained 100 protrusions per square inch.

2) The projection occupied about 50% of the surface area of the forming wire.

3) The protrusion extended to about 0.004 inches above the forming wire reinforcement structure.

4) The opening of each projection occupied about 10% of the surface area of the forming wire.

5) On the wet side of a normal papermaking process, 2% amino silicone (Genera
l Sold as CM22666D1 by Electric) at 0.0
Introduce into the NSK pulp slurry at a rate of 04 pounds of aminosilicone solids.

6) On the wet side of a normal papermaking process, 1% Kymene 2064 (Hercules Inc.
Is introduced into the NSK pulp slurry at a rate of 20 pounds of Kymene solids per ton of dry paper.

B) Production of Activated Web The activated web is produced by laminating a formed film and a paper layer having the same constitution as the above-mentioned second web. The formed film is about half as wide as the paper web. The difference in width is such that the emulsion is applied and then folded so that the final product can have an activated web on only one side of the emulsion, as shown in FIG.

A formed film is a macroscopically spread three-dimensional web of polymeric material made according to the teachings of US Pat. No. 4,342,314 (issued to Radel et al. On Aug. 3, 1982). The formed film is a regular (regulated) consisting of a network of tapered capillaries.
) It has a three-dimensional microstructure with a continuum. This network begins at a first surface 42 in plane 43 and extends therefrom and ends at a second surface in plane 45;
Openings are formed on both surfaces. The size of the opening is about 0.0
40 inches and about 0.016 inches on the other surface. Plane 43 and Plane 4
The overall height between 5 is about 0.012 inches. The microstructure has a density of about 625 capillaries per square inch. The base 54 located in the plane 43 may include a fine aberration 60, generally in accordance with the teachings of commonly assigned U.S. Pat. good. The surface aberrations 60 may protrude outwardly or define inward recesses and have a length of at least 0.002 inches from the plane where the aberrations begin. The average distance between adjacent surface aberrations is less than 0.004 inches.

The formed film is laminated to the paper layer using a hot melt adhesive H2031, commonly available from Ato-Findley Adhesives (Wow Watsa, Wis.). In this example, the more textured side of the formed film is directed toward the emulsion (ie, the adhesive used in the lamination process is applied to the less textured side). Screen printer (Model SP- from ITW Dynatec)
Using 117), apply the hot melt adhesive in a continuous pattern.

C) Emulsion Preparation A 1000 g batch of the emulsion (88.65% internal phase) is prepared from the ingredients shown in Table 2.

[0133]

[Table 2] After mixing all polar phase components together to formulate the inner polar layer, 140
Heat to ° F (45.8 ° C). Independently, the lipid phase components are mixed for about 1
Heat until melted to a temperature of 40 ° F. Next, the polar and lipid phase components are combined in a stainless steel container and then mixed using a Hobart Model 100-C mixer set at low speed with slow cooling. Mixing is performed until an emulsion is formed. Emulsion formation is manifested by an increase in viscosity, greater than 2000 centipoise as measured using a rotating disk viscometer from Lab-Line Instruments.

D) Applying the Emulsion to the Activated Web The emulsion prepared in step C was applied to the textured side of the activated web (ie, the molded film) using a spray process similar to that shown in FIG. Side). The emulsion is maintained at a temperature of 135 ° F. and is in a liquid or molten state. The emulsion is transferred by a positive displacement pump to the spray head indicated by arrow 12 at a constant volume flow rate of 625 mL / min to a line speed of 25 fpm. It allows continuous beads to be applied to the paper web without passing any air flow through line 64. Next, a second web is overlaid on the activated web, as shown in FIG. Next, the final product 10 is pierced (devices for sealing, folding and perforating are not shown in FIG. 4 (a)) to produce the final product wipe.

While specific embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention. It is intended that the appended claims cover all such modifications that fall within the scope of the invention.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a preferred embodiment of a cleaning article according to the present invention.

FIG. 2 is an enlarged, partially sectioned perspective view of a preferred macroscopically expanded three-dimensional formed film web suitable for use as an activated web in a cleaning article according to the present invention.

FIG. 3 is a front sectional view showing another preferred embodiment of the cleaning article according to the present invention.

FIG. 4 is a plan view (a) illustrating one embodiment of an activated web comprising a continuous network of polymeric material printed on a support, useful in the articles of the present invention, and FIG.
FIG. 4 is a cross-sectional view showing the textured three-dimensional surface resulting from printing the polymer on a support to form the activated web, as viewed along 4-4 of the activated web shown in FIG.

FIG. 5 is a schematic illustrating a spray system suitable for use in applying a high internal reversal emulsion to a carrier support.

FIG. 6 is a schematic diagram illustrating a rotogravure printing coating system suitable for use in applying a high internal reciprocal emulsion to a carrier support.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Cleansing article 2 ... Activated web 3 ... Second web 4 ... Inner zone 5 ... Multi-phase multi-component emulsion 10 ... Carrier web 12 ... Spray head 14 ... Dispersion spray 16 ... Ball screw drive 18 ... Coupling 22 ... Hydraulic cylinder 26 ... Piston 30 ... High Internal Reversal Emulsion 34 ... Four-way Coupling 40 ... Polymer Web 41 ... Capillary 42 ... First Surface 42 ... Filling Port 43,45 ... Plane 44 ... Second Surface 46,38 ... Line 47 58, opening 48, 49, 50, 51, 52 ... fibrous element 50 ... pressure gauge 54 ... base 56 ... side wall 56, 58, 60 ... valve 60 ... aberration 64 ... line 68 ... air 72 ... regulator 110: polymer 110: carrier web 112a, 126a, 128a, 38a, 142a, 146a, 150a ...
Rotation direction 112 ... Parent roll 114, 116, 118 ... Rotation roll 114 ... Support 120 ... Gravure coating system 122 ... Treated web 126 ... Surface rewinder 126 128 ... Final product 130, 134 ... Gravure press machine 138, 146 ... Anilox cylinder 142, 150: Print plate cylinder 154, 158, 162: Nip area 200: Web

──────────────────────────────────────────────────続 き Continuation of front page (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, SZ, UG, ZW), EA (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), AL, AM, AT, AU, AZ, BA, BB, 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, ZW OF AMERICA (72) Inventor Vertical, John Billings 45069, West Chester, Wheat Chester, Wheatland Meadow Court 7367 F-term (reference) 4H003 AC03 AC21 BA22 BA24 DA05 DA10 DA11 EA12 EB04 EB16 EB37 EB40 ED02 FA21

Claims (12)

[Claims] 1. A ratio of wet thickness to dry thickness, comprising a first surface having one or more regions exhibiting a textured three-dimensional surface topography and a second surface. A cleansing article comprising: an activated web having a (resilience ratio) of at least 0.9; and (b) a multi-phase, multi-component emulsion that comes into direct contact with the first surface of the activated web during use. (A) a ratio of wet thickness to dry thickness, comprising a first surface having one or more regions exhibiting a textured three-dimensional surface topography, and a second surface; An activated web having a (resilience ratio) of at least 0.9; (b) a second web bonded to the activated web at least around each other; and (c) directly in use with a first surface of the activated web. A cleansing article comprising: a contacting multi-phase multi-component emulsion. 3. The resilience ratio of the activated web is preferably at least about 0.95, more preferably at least 0.98.
Or the cleansing article according to 2. 4. A cleansing article according to claim 1, wherein the activated web comprises a macroscopically spread three-dimensional molded film. 5. The cleansing article according to claim 1, wherein the activated web has a capillary web structure. 6. The cleansing article according to claim 1, wherein the activated web comprises a thermoplastic material. 7. The cleansing article according to claim 1, wherein the activated web is fluid permeable. 8. The cleansing article according to claim 1, wherein the activated web is impermeable to a fluid. 9. A cleansing article according to claim 1, further comprising at least one additional web facing the second web, which is circumferentially bonded to the activated web. 10. The cleansing article according to claim 1, wherein one or more textured areas of the activated web comprise particulate material. 11. A cleansing article according to claim 1, wherein one or more textured areas of the activated web comprise an adhesive polymer material. 12. An emulsion wherein the emulsion comprises (a) a continuous solidified lipid phase comprising 2 to 60% of a waxy lipid material having a melting point of 30 ° C. or higher; and (b) 39 to 97% of the emulsion dispersed in the lipid phase. 12. Cleansing according to any one of the preceding claims, characterized in that it comprises: an internal polar phase, and (c) an effective amount of an emulsifier capable of forming an emulsion when the lipid phase is in a fluid state. Supplies.