DE29724799U1 - Cleaning implement for cleaning hard surfaces - comprises handle and removable cleaning pad and has controlled fluid absorbency allowing beneficial cleaning without using large quantities of fluid - Google Patents

Abstract

A cleaning implement comprises a handle and a removable cleaning pad having an average absorbency rate of deionised water of not more than 0.5 (especially 0.2, more especially 0.1)g/sec, and a t1200 absorbent capacity of at least 1 (especially 10, more especially 20) g deionised water per g of the pad. Also claimed are: (1) A cleaning pad having an average absorbency rate of deionised water of not more than 0.5 (especially 0.2, more especially 0.1)g/sec and a t1200 absorbent capacity of at least 1 (especially 10, more especially 20)g deionised water per g of the pad; (2) a method for cleaning a hard surface using low levels of a cleaning solution comprising: (i) applying the cleaning solution to the hard surface at a level of not more than 6 ml/sq.ft. of surface; and (ii) wiping the surface with the cleaning implement as above; and (3) a method of cleaning a surface comprising wiping the surface with the cleaning implement as above. The removable pad comprises a scrubbing layer in direct fluid communication with the absorbent layer, an absorbent layer and an optical scrim material. The implement further comprises an attachment layer comprising fluid impervious material for mechanically attaching the pad to the handle, the absorbent layer being positioned in between the attachment layer and the scrubbing layer. The cleaning pad has a squeeze out value of not more than 40 (especially 25)% at 0.25 psi. The absorbent layer comprises a super-absorbent material selected from super-absorbent gelling polymers and hydrophilic polymeric absorbent foams.

Description

technical area

The present application relates a cleaning device, that in removing dirt from hard surfaces Benefit is. The registration concerns in particular a cleaning device, which a Handle and a removable absorbent cleaning pad. The Registration also applies to the absorbent cleaning pad that with the cleaning device is useful. The cleaning pad shows the ability to handle fluids or liquids to absorb at a regulated rate and the absorbed fluids while withhold the cleaning process.

background the invention

The literature is full of products for cleaning hard surfaces, like ceramic tile floors, Hardwood floors, Counter tops and the like, capable are. Numerous devices have been described in connection with the cleaning of floors, comprising a handle and means for absorbing a fluid cleaning composition. Such devices conclude those that are reusable, including Möppe, the cotton thread, cellulose and / or contain synthetic strips, sponges and the like, on. While this mob successful in removing numerous types of dirt from hard surfaces these typically require the tedious task of performing one or more rinsing steps while of use to satiety to avoid leaving the material with dirt, stains, etc. This mob require hence the use of a container to carry out of the rinsing step) to refresh the device and usually are these rinsing steps unable to remove debris sufficiently to remove. This can lead to a redeposition of considerable amounts of dirt during of the subsequent operations run with the mop. About that In addition, reusable mops are used over time used, increasingly dirty and smelly. This affects on the subsequent cleaning performance negative.

To some of the negative properties to mitigate in connection with reusable mugs are attempts been undertaken, Möppe to be provided with removable cleaning pads. For example describes U.S. Patent No. 5,094,559, issued March 10, 1992 to Rivera et al., a mop, which includes a removable cleaning pad that a scrubbing layer to remove dirt from a dirty one Surface, a canceling layer for absorbing fluid after the cleaning process and one between the rubbing and extinguishing layer arranged liquid-impermeable layer includes. The pillow contains further a tearable Package device between the scrubbing layer and the liquid impermeable layer is arranged. The tearable Packages are arranged so that when torn fluid is cleaned on the one to be cleaned surface is headed while the cleaning process with the abrasive layer prevents the impermeable layer, that fluid flows to the absorbent quench layer. After completion During the cleaning process, the cushion is removed from the mop handle and fastened again so that the extinguishing layer comes into contact with the ground. While this device regarding the need to use multiple rinsing steps relief, it requires that the user physically handles the pillow and a dirty, damp pillow fastened again to end the cleaning process.

The US patent also describes this No. 5,419,015, issued May 30, 1995 to Garcia, with a mop removable, washable work pillows. The pillow is as one described which is an upper layer that is used to attach to hooks capable on a mop head is a central layer of synthetic, plastic, microporous foam, and a bottom layer for contacting a surface during the Cleaning operation or the cleaning operation includes. The Composition of the lower layer depends, it is stated, on the intended use of the device from, d. H. Wash, polish or scrub or scrub. While the Reference deals with problems related to Möppen, which a rinse off during the Require use, the patent cannot provide a cleaning device, that sufficiently removes the dirt that is deposited on typical hard household surfaces has, especially on floors, so the surface is perceived as practically dirt-free.

In particular, that of Garcia described synthetic foam for absorbing the cleaning solution relatively low absorption capacity for water and solutions Water-based. As such, the user must either use small amounts of cleaning solution use so as to within the absorption capacity of the pillow remain, or the user must considerable Amount of cleaning solution on the surface to be cleaned leave behind. In both situations, the overall performance of the cleaning pad is not optimal.

While many known hard surface cleaning devices have been successful in removing a wide variety of types of dirt encountered by the typical user during the cleaning process, they are inconvenient and time consuming in that they require one or more cleaning / rinsing steps. The devices of the state of the art, in which one can deal with Fra convenient handling and time-saving, achieve this at the expense of cleaning performance. Thus, there remains a need for a device that offers both convenient handling and advantageous dirt removal. Therefore, it is an object of the present invention to provide a cleaning device which includes a removable cleaning pad which alleviates the need to rinse the pad out during use and provides a substantially dry result. In particular, it is an object of the present invention to provide an apparatus comprising a removable cleaning pad having sufficient absorption capacity based on one gram of absorbed fluid per gram of cleaning pad which enables a large area to be cleaned, such as that of a typical floor hard surface (e.g. 80-100 ft²) without the need to refresh or change the pillow. It is a further aim to provide such a cleaning device in which the pillow has advantageous dirt removal properties. Where the cleaning device of the present invention is used in combination with a cleaning solution, another aim is to provide a practically dry end result.

The device of the present invention is designed to be compatible with all substrates with hard surfaces, including wood, vinyl, linoleum, non-wax floors, ceramics, ^Formica® , porcelain, glass, blackboards, and the like ,

Summary the invention

• a. einen Handgriff; und
• b. ein entfernbares Reinigungskissen umfassend:
• i eine Scheuerschicht;
• ii. eine Absorptionsschicht; und
• iii. wahlweise ein Scrimmaterial,

wobei das Reinigungskissen eine durchschnittliche Absorptionsrate für entionisiertes Wasser von nicht mehr als 0,5 g/s und eine t₁₂₀₀-Absorptionskapazität von mindestens 1 g entionisiertes Wasser pro g des Reinigungskissens aufweist und die Scheuerschicht in direkter Fluidverbindung mit der Absorptionsschicht steht.The present invention relates to a cleaning device comprising:

• a. a handle; and
• b. a removable cleaning pad comprising:
• i a scrubbing layer;
• ii. an absorption layer; and
• iii. optionally a scrim material,

wherein the cleaning pad has an average deionized water absorption rate of no more than 0.5 g / s and a t ₁₂₀₀ absorption capacity of at least 1 g deionized water per g of the cleaning pad, and the scrubbing layer is in direct fluid communication with the absorption layer.

Without being limited by wet cleaning applications, the present invention is preferably in combination with a cleaning solution used. That means while the device initially in a dry state, includes an optimal cleaning performance for the typical Cleaning hard surfaces the use of a cleaning liquid on the dirty surface before cleaning with the present device. During the Efforts to develop the present cleaning device were found the applicants surprisingly found out a critical aspect of cleaning ability to regulate the rate of fluid absorption through the cleaning pad. That is, while while it's important practically all of the liquid cleaning solution in the time when the typical user cleans a surface, to absorb, it is also important to absorb quickly by avoiding the cleaning pad. This is generally stated in Contradicting the teachings of the prior art, which relates to absorbent articles relates to where it is recognized that an immediate, rapid absorption capacity he wishes is

Avoiding rapid absorption enables the highly effective use of the cleaning solution used in Emulsify, dilute and transporting dirt into the pillow. In this regard allows the cleaning device of the present invention the cleaning of hard surfaces under Use of small proportions of cleaning solution in relation to the proportions of solution, those when using cleaning devices of the prior art required are. This provides numerous advantages, including that a reduction in the cost of the cleaning solution that is required to perform the cleaning operation. The notifiers found that through the use of a cleaning pad that controlled a absorbency possesses excellent cleaning results can be achieved under Use of solution parts from not higher as about 6 ml of cleaning solution per square foot of the area to be cleaned, while at the same time using a pillow sufficiently high absorption capacity to provide a practically dry end result is provided. Without a theory To be bound, it is required that through the cleaning pad regulated rate contemplated by the present invention an efficient fluid reservoir in contact with the ground, that's the dilution and aids in transporting dirt into the pillow Use of smaller volumes of additional fluid than cleaning systems state of the art is required. As such, this will continue a method of cleaning hard surfaces using minor Parts of a cleaning solution described, the method comprising:

• (i) applying the cleaning solution the hard surface to be cleaned in a proportion of not higher as about 6 ml of cleaning solution per square foot of hard surface; and
• (ii) wiping the hard surface with a cleaning device comprising:
• a. a handle; and
• b. a removable cleaning pad with a t ₁₂₀₀ absorption capacity of at least about 1 g of deionized water per g of cleaning pad.

Preferably, the method uses about 0.5 to about 6 ml of cleaning solution per square foot of the hard surface, more preferably about 2 to about 4 ml per square foot. Preferably, the method includes using a cleaning pad having a t ₁₂₀₀ absorption capacity of at least about 5 g / g, more preferably at least about 10 g / g, even more preferably at least about 20 g / g, and even more preferably at least about 30 g / g G. It should be understood that the method can also be extended to the use of the cleaning pad as an independent product (namely without a handle).

In addition to the fact that the cleaning pad a the required regulated rate of absorbency it is still important that it has the ability to absorb most of it of the liquid used has. In this regard, is a minimal total absorption capacity of the cleaning pad required. The total absorbency is also important by allowing sufficient amounts of cleaning solution to be used (um the solution-dirt interaction to maximize) and ensures that virtually the entire solution and the solubilized dirt is removed from the surface.

The one in the present invention useful handle comprises optionally a swivel-mounted carrier head at one end. The removable cleaning pad preferably comprises:

• i. a scrubbing layer;
• ii. an absorption layer, preferably in direct fluid communication stands with the scouring layer; and
• iii. an optional additional layer for releasably attaching the cleaning pad on the handle, preferably on the optional support head of the handle.

The present invention relates to a method for cleaning a hard surface, which the step of wiping the surface with a device or pillow of the present invention.

Short description the drawing

The 1a Figure 3 is a perspective view of a cleaning device of the present invention having an on-board liquid dispensing device.

The 1b Figure 3 is a perspective view of a cleaning device of the present invention that does not have an on-board liquid dispensing device.

The 1c is a side view of the handle of the in 1a shown device.

The 2 Figure 3 is a perspective view of a removable cleaning pad of the present invention.

The 3 Figure 12 is an exploded perspective view of the absorbent sheet of a removable cleaning pad of the present invention.

The 4 10 is a cross-sectional view of one embodiment of a removable cleaning pad of the present invention.

The 5 Fig. 3 is a schematic view of an apparatus for measuring the power under pressure (PUP) capacity of the removable cleaning pad.

The 6 provides an enlarged cross-sectional view of the piston / cylinder arrangement as in 5 shown.

The 7 FIG. 10 is an exploded perspective view of another removable cleaning pad of the present invention.

The 8th Fig. 3 is a perspective view of another removable cleaning pad of the present invention.

Full description

1. Definitions

As used herein, the means Label "comprehensive" that the different Components, parts or steps together in the practical execution of the present invention can be used. Hence the Designation "comprehensive" consisting of the even more restrictive designations "essentially from "and" consisting of ".

As used herein, the means Label "direct Fluid communication ", that fluid is easily between two cleaning pad components or layers (e.g. the scrubbing layer and the absorption layer) without one essential accumulation. Transport or restriction by an in between transfer lying layer are coming. For example, you can Fabrics, non-woven structures, construction adhesives, scrims and the like between the two independent Components are present while maintaining the "direct fluid connection" as long as they are not significantly hinder or restrict the fluid while it is off a component or layer to another flows.

As used herein, the means Designation "Z dimension" the dimension vertical to the length and width of the cleaning pad of the present invention or a component of it, The Z dimension usually corresponds the thickness of the cleaning pad or a pad component.

As used herein, the term "X-Y dimension" means the plane perpendicular to that Thickness of the cleaning pad or a component thereof. The X and Y dimensions usually correspond to the length or width of the cleaning pad or a pad component.

As used herein, the means Description "layer" a part or a Component of a cleaning pad whose main dimension is X-Y, d. H. along its length and width. It should be understood that the term layer not necessarily on individual layers or layers of material limited Thus, the layer can be laminates or combinations of several Include layers or structures of the required type of material. consequently includes the term "layer" the terms "layers" and "coated".

As used herein, the term "hydrophilic" becomes the term of surfaces used which are wettable by aqueous fluids deposited thereon. Hydrophilicity and wettability are typically related to the contact angle and the surface tension of the affected fluids and solid surfaces. This is detailed in the publication the American Chemical Society, entitled Contact Anal, Wettability and Adhesion (contact angle, wettability and liability) by Robert F. Gould (Copyright 1964), herein by the Reference to it is included. A surface is said to be covered by a fluid (i.e. H. hydrophilic) when either the contact angle between the fluid and the surface is less than 90 ° or if the fluid tends to spontaneously spread across the surface, where both conditions are usually side by side occurrence. Conversely, a surface is considered "hydrophobic" if the contact angle is greater than Is 90 ° and the fluid does not spontaneously spread over the surface.

As used herein, the means Designation "Scrim" any stable material, that of the surface contacting side of the scrubbing layer of the cleaning pad Gives texture and also has a sufficient degree of openness, the required fluid movement to the absorbent layer of the cleaning pad. Close suitable materials Materials that have a continuous open structure, like synthetic and wire mesh sieves. The open areas of this Materials can easily regulated by varying the number of interconnected strands that comprise the sieve mesh, by regulation the thickness of these interconnected strands, etc. Other suitable Close materials one in which a texture is printed by a substrate Pattern is provided. In terms of this aspect can be a constant Material (e.g. a plastic or resin) on a substrate in one continuous or discontinuous patterns can be printed, such as single points, bristle-shaped Filaments (e.g. flocking) and / or lines to provide the required texture provided. More like that Way, the continuous or discontinuous pattern a rejection material can be printed, which is then scrim acts. These patterns can repeating patterns or they can be random. It goes without saying that one or more of the for the provision of the desired Methods described can be combined under texture Creation of the optional scrim material. The height in the Z direction and the open The area of the scrim and / or the substrate scouring layer support the Regulating (i.e. slowing down) the rate of fluid flow in the absorbent core material. The Z dimension or height of the scrim and / or the abrasive layer contribute to the provision of an agent Regulation of the volume of liquid in contact with the cleaning surface at, while regulating the rate of fluid absorption into the absorbent core material.

For the purpose of the present invention is an "upper" layer of a cleaning pad Layer that is relatively further away from the surface that is to be cleaned (i.e. in connection with the device, relatively seen during of use closer on the device handle). The term "lower" layer means the other way around a layer of a cleaning pad that is relatively closer to the surface to be cleaned (i.e., is relatively further away from the device from the device handle during the Use). As such, the scrubbing layer is the bottom layer and the absorption layer is an upper layer in proportion the scouring layer. The terms "upper" and "lower" are used similarly when reference is made to layers that are multilayered (e.g. if the Abrasion layer is a two-layer material).

All percentages used herein Ratio and Quantities are by weight unless otherwise stated is.

II. Cleaning devices

• a. einen Handgriff; und
• b. ein entfernbares Reinigungskissen umfassend:
• i eine Scheuerschicht;
• ii. eine Absorptionsschicht; und
• iii. wahlweise ein Scrimmaterial,

wobei das Reinigungskissen eine durchschnittliche Absorptionsrate für entionisiertes Wasser von nicht mehr als 0.5 g/s und eine t₁₂₀₀-Absorptionskapazität von mindestens 1 g entionisiertes Wasser pro g des Reinigungskissens aufweist und die Scheuerschicht in direkter Fluidverbindung mit der Absorptionsschicht steht.The cleaning device of the present invention comprises:

• a. a handle; and
• b. a removable cleaning pad comprising:
• i a scrubbing layer;
• ii. an absorption layer; and
• iii. optionally a scrim material,

wherein the cleaning pad has an average deionized water absorption rate of no more than 0.5 g / s and a t ₁₂₀₀ absorption capacity of at least 1 g deionized water per g of the cleaning pad, and the scrubbing layer is in direct fluid communication with the absorption layer.

As indicated above, the Er is based Acknowledges upon finding that a regulated rate of fluid absorption by the absorbent pad improves overall cleaning performance. In particular, the cleaning pads have an average absorption rate of no more than about 0.5 g / s, which average rate is calculated based on the rates measured during the first 1200 seconds (hereinafter "average absorption rate"). The average absorption rate is determined using the power-under-pressure method (hereinafter referred to as the "PUP" method), which is described in detail in the "Test Method" section below. (In short, the PUP method measures the absorbency of the cleaning pad at different times under an initial limiting pressure of 0.09 psi (which reflects typical working pressures during the cleaning process). Preferably, the average absorption rate is no more than about 0.3 g / s, more preferably no more than about 0.2 g / s, even more preferably no more than about 0.1 g / s.

While avoiding rapid fluid uptake by the pad is required of the cleaning pad to achieve the desired cleaning results, the cleaning pad is also required to absorb most of the liquid used during the cleaning process. As such, the cleaning pads have an absorbent capacity at 1200 seconds (referred to herein as "t ₁₂₀₀ absorbent capacity"), when measured using the PUP method, of at least about 1 g deionized water per gram of the cleaning pad. Preferably, the cleaning pad has a t ₁₂₀₀ absorption capacity of at least about 5 g / g, more preferably at least about 10 g / g, even more preferably at least about 20 g / g, and even more preferably at least about 30 g / g.

The cleaning pads preferably have, however not necessarily, total fluid capacity (from deionized water) at least about 100 g, more preferably at least about 200 g, more preferably at least about 300 g, and most preferred of at least about 400 g. While Pillows with a total fluid capacity of less than 100 g within the Scope of the invention, they are not so good for cleaning greater surfaces, like they are in a typical household, like pillows with one higher Capacity.

The experienced professional will recognize that various materials for carrying out the claimed invention can be used. Consequently is while preferred materials below for the various equipment and Cleaning pad components are described, it can be seen that the scope of the invention is not limited to such descriptions.

A. Handle

The handle of the cleaning device consists of any material that makes it easier to grasp the cleaning device. The handle of the cleaning device preferably includes any elongated or stretched, constant Material for a practical cleaning ensures. The length of the handle is determined by the intended use of the device certainly.

The handle preferably comprises at one end a support head to which the cleaning pad can be releasably attached. To facilitate convenient use, the carrier head can be pivotally attached to the handle using known hinge assemblies. Any suitable means for attaching the cleaning pad to the carrier head can be used as long as the cleaning pad remains attached during the cleaning process. Examples of suitable fasteners include clips, hooks & loops (e.g. ^Velcro® ) and the like. In a preferred embodiment, the carrier head comprises hooks on its lower surface which are mechanically connected to the upper layer (preferably its own additional layer) of the absorbent cleaning pad. A preferred handle which comprises a fluid dispensing means is in 1 illustrated and fully in pending U.S. Patent Application Serial No. filed November 26, 1996 by VS Ping et al. (case 6383), hereby included by reference. Another preferred handle; which does not contain a fluid dispenser is in the 1a and 1b and is fully described in pending U.S. Patent Application Serial No. filed September 23, 1996 by AJ Irwin (Case 6262), hereby incorporated by reference.

B. Removable cleaning pad

worin R der Röhrenradius ist, γ die Oberflächenspannung der absorbierten Flüssigkeit ist, Θ der Kontaktwinkel an der Fluid-Fest-Grenzfläche ist, ρ die Fluiddichte ist, g die Gravitationskonstante ist, L die benetzte Streckenlänge der Röhre ist und μ die Viskosität der Flüssigkeit ist. Durch diese Gleichung wird deutlich, dass die Absorptionsrate durch das Reinigungskissen beispielsweise durch Einstellen der Porengröße des Materials, aus welchem das Reinigungskissen aufgebaut ist, Einstellen der Oberflächenbenetzbarkeit (cos Θ) des Materials für die absorbierte Flüssigkeit etc. regulierbar ist. Zusammen mit den Lehren der vorliegenden Beschreibung kann jedes beliebige der allgemein bekannten Absorptionsmaterialien zum Einsatz kommen und kombiniert werden, um die gewünschte anfängliche Verzögerung bei der Absorption, jedoch dem Gesamtabsorptionsvermögen, zu erzielen. Folglich ist, während repräsentative Materialien und Ausführungsformen, die als Reinigungskissen nützlich sind, untenstehend beschrieben sind, die Erfindung nicht auf solche Materialien und Ausführungsformen beschränkt.Given the applicant's knowledge that regulated absorption rates play an important role in the cleaning performance of the devices of the present invention, those skilled in the art will recognize that the rate of fluid absorption of the cleaning solution by the cleaning pad by the solution and the materials from which it is made Pillow exists, is determined. In this regard, volume flux (ie the rate of fluid uptake) can be calculated using the Hagen-Poiseuille law for laminar flow. The Hagen-Poiseuille law provides that the volume flux q is calculated according to the following formula:

where R is the tube radius, γ the surfaces is the voltage of the absorbed liquid, Θ is the contact angle at the fluid-solid interface, ρ is the fluid density, g is the gravitational constant, L is the wetted length of the tube and μ is the viscosity of the liquid. This equation makes it clear that the absorption rate through the cleaning pad can be regulated, for example, by adjusting the pore size of the material from which the cleaning pad is constructed, adjusting the surface wettability (cos Θ) of the material for the absorbed liquid, etc. Along with the teachings of the present specification, any of the well known absorbent materials can be used and combined to achieve the desired initial delay in absorption, but total absorbency. Accordingly, while representative materials and embodiments useful as cleaning pads are described below, the invention is not limited to such materials and embodiments.

i. scrubbing layer

The cleaning pad of the present Invention includes preferably a scrubbing layer and an absorption layer. The Scouring layer is the part of the cleaning pad that is dirty with the surface while of cleaning is in contact. As such, need to be useful as a scrubbing layer Sufficiently resistant materials so that the layer maintains its integrity during the cleaning process maintains, without the surface to be cleaned to damage. If the cleaning pad is also used in combination with a solution the abrasive layer has to absorb liquids and dirt capable be and doing these liquids and release dirt to the absorption layer. This ensures that the scouring layer is constantly is able to additional material from the surface to be cleaned to remove. Whether the device with a cleaning solution used (i.e. wet) or without cleaning solution (i.e. H. when dry), the abrasive layer also lightens the removal of particle dirt other functions such as polishing, Dusting and buffing the surface.

The scrubbing layer can be a single layer or Be a multi-layer structure, with one or more layers of it along separately can be to the scrubbing of the dirty surface and the absorption of particle dirt to facilitate. This scouring layer occurs with the dirt (and the cleaning solution, if used) while interacting with them over the dirty surface guided is being stubborn Dirt loosened and is emulsified and this freely in the absorption layer of the Pillow can get. The abrasive layer preferably contains slots, one comfortable passage for larger particle dirt provide to free yourself up in the absorption layer of the pillow move and get trapped there. Structures with low Density are for the use as a scrubbing layer is preferred to the transport of Particle substance to facilitate the absorption layer of the pillow.

To ensure the desired integrity, close for the scrubbing layer particularly suitable materials synthetic materials, such as polyolefins (e.g. polyethylene and polypropylene), polyesters, polyamides, synthetic Celluloses (e.g. rayon) and mixtures thereof. Such synthetic Materials can using known methods, such as carded, as spunbond, meltblown, air-laid, with needles holed and like.

ii absorption layer

The absorption layer serves Fluid and dirt from the cleaning pad during the Were absorbed during use. While the scouring layer is one some impact on ability of the pillow to provide the required fluid absorption rates, the absorption layer plays the main role in achieving the desired Absorption rates and the total absorbency of the present invention.

The absorption layer is for the removal of Capable of fluid and dirt from the scrubbing layer, making the scrubbing layer the ability for the continuous removal of dirt from the surface. The absorption layer should also be used to retain absorbed material under typical use pressures be able, to "squeeze" of absorbed Dirt, cleaning solution etc. to avoid.

The absorption layer comprises everything Material required to absorb fluids with the necessary Guess and reluctance such fluids during capable of use is. To the ones you want Total fluid capacity To achieve, it is preferred to include a material in the absorption layer a relatively high capacity (in terms of of grams of fluid per gram of absorbent material). How As used herein, the term "superabsorbent material" means any absorbent material with a g / g capacity for water of at least about 15 g / g when under a limiting pressure measured at 0.3 psi. Because the majority of those useful in the present invention Cleaning fluids on aqueous Basis, it is preferred that the superabsorbent Materials have a relatively high g / g capacity for water or water-based fluids have.

Representative superabsorbent materials include water-insoluble, water-swellable, superabsorbent, gelling polymers (herein referred to as "superabsorbent gelling polymers"), which are generally known in the literature. These materials show very high absorption capacities for water. The superabsorbent gelling polymers useful in the present invention can have a size, shape and / or morphology that vary within a wide range. These polymers may be in the form of particles that do not have a high ratio of the largest dimension to the smallest dimension (e.g. granules, flakes, powder particles, particle-particle aggregates, cross-linked particle-particle aggregates, and the like), or they can be in the form of fibers, sheets, films, foams, laminates and the like. The use of superabsorbent gelling polymers in fibrous form provides the advantage of providing improved retention of the superabsorbent material with respect to the particles during the cleaning process. While their capacity is generally lower for water-based mixtures, these materials demonstrate significant absorption capacity for such mixtures. The patent literature is full of disclosures of water-swellable materials; see, for example, U.S. Patent 3,699,103 (Harper et al.) issued June 13, 1972; U.S. Patent 3,770,731 (Harmon), issued June 20, 1972; U.S. Patent 32,649 (Brandt et al.), reissued, issued April 19, 1989; U.S. Patent 4,834,735 (Alemany et al.), issued May 30, 1989.

Superabsorbent, gelling polymers that useful in the present invention include Variety of water-insoluble, but water swellable Polymers capable of absorbing large amounts of fluids on. Such polymeric materials are also commonly referred to as "hydrocolloids" and can be polysaccharides, like carboxymethyl starch, Carboxymethyl cellulose and hydroxypropyl cellulose; nonionic types, such as polyvinyl alcohol and polyvinyl ether; cationic types like Polyvinyl pyridine, polyvinyl morpholine ion and N, N-dimethylaminoethyl or N, N-diethylaminopropyl acrylates and methacrylates and the corresponding quaternary salts thereof. typically, exhibit superabsorbent, gelling polymers used in the present invention are useful, a variety of anionic functional groups, like sulfonic acid, and still typically carboxy groups. Examples of for here Suitable polymers described use include those a made from polymerizable, unsaturated, acidic mononiers become. Therefore close such monomers include the olefinically unsaturated acids and anhydrides that at least one olefinic carbon-to-carbon double bond contain. In particular can these monomers from olefinically unsaturated carboxylic acids and anhydrides, olefinically unsaturated sulfonic acids and mixtures thereof his.

Some non-acid monomers can also in making those useful herein superabsorbent, gelling polymers, usually in smaller ones Amounts to be included. Such non-acid monomers can include, for example water-soluble or include water-dispersible esters of the acidic monomers, as well as monomers, the ever no carboxylic acid or sulfonic acid groups contain. Optional non-acid monomers can therefore include monomers which contain the following types of functional groups: carboxylic acid or Sulfonic acid esters, hydroxyl groups, Amide groups, amino groups, nitrile groups, quaternary ammonium salt groups, Aryl groups (e.g. phenyl groups, such as those derived from styrene monomer). These non-acid monomers are common known materials and are more detailed for example in the U.S. Patent 4,076,663 (Masuda et al.), Issued February 28, 1978, and in U.S. Patent 4,062,817 (Westerman), issued December 13 1977, both hereby incorporated by reference.

Olefinically unsaturated carboxylic acid and carboxylic anhydride monomers conclude the acrylic acids one by acrylic acid itself, methacrylic acid, ethacrylic, α-chloroacrylic acid, α-cyanoacrylic acid, β-methylacrylic acid (crotonic acid), α-phenylacrylic acid, β-acryloxypropionic acid, sorbic acid, α-chlorosorbic acid, angelic acid, cinnamic acid, ρ-chlorocinnamic acid, β-sterylacrylic acid, itaconic acid, citroconic acid, mesaconic acid, glaconic acid, glaconic acid, glaconic acid, glaconic acid nitic acid, maleic acid, fumaric acid, tricarboxyethylene and maleic anhydride are exemplified.

Olefinically unsaturated sulfonic acid monomers conclude aliphatic or aromatic vinylsulfonic acids, such as vinylsulfonic acid, allylsulfonic acid, vinyltoluenesulfonic acid and styrene; Acrylic and methacrylic sulfonic acid, such as sulfoethyl acrylate, sulfoethyl methacrylate, sulfopropyl acrylate, Sulfopropyl methacrylate, 2-hydroxy-3-methacryloxypropylsulfonic acid and 2-acrylamide-2-methylpropanesulfonic acid.

Preferred superabsorbent gelling polymers for use in the present invention contain carboxy groups. These polymers include hydrolyzed starch-acrylonitrile graft copolymers, partially neutralized hydrolyzed starch-acrylonitrile graft copolymers, starch-acrylic acid graft copolymers, partially neutralized starch-acrylic acid graft copolymers, saponified vinyl acetate-acrylic ester copolymers, hydrolyzed acrylonitrile-linked or easily linked acrylamide copolymers or acrylamide copolymers of any of the aforementioned copolymers, partially neutralized polyacrylic acid and slightly network-linked polymers of partially neutralized polyacrylic acid. These polymers can be used either alone or in the form of a mixture of two or more different ones Polymers are used. Examples of these polymer materials are described in U.S. Patent 3,661,875, U.S. Patent 4,076,663, U.S. Patent 4,093,776, U.S. Patent 4,666,983 and U.S. Patent 4,734,478.

The most preferred polymer materials for use in the manufacture of the superabsorbent gelling Polymers are slightly network-linked polymers of partially neutralized ones polyacrylic and starch derivatives thereof. The strongest preferably the hydrogel-forming absorption polymers comprise approximately 50 to about 95%, preferably about 75% neutralized, slightly network-like linked polyacrylic acid (i.e. poly (sodium acrylate / acrylic acid)). Network-like linking does the polymer is practically insoluble in water and partly determines the absorption capacity and the characteristics of the Extractable polymer content of superabsorbent gelling Polymers. Procedure for the network-like link these polymers and typical network linking agents are more detailed in U.S. Patent 4,076,663.

While the superabsorbent gelling polymers preferably from one single type (i.e. homogeneous), mixtures of polymers also in the devices of the present invention are used. For example, mixtures of starch-acrylic acid graft copolymers and easily networked Polymers of partially neutralized polyacrylic acid in the present invention are used.

While any of the superabsorbent described in the prior art gelling polymers may be useful in the present invention can, it has recently been recognized that where significant proportions (e.g. B. more than about 50 wt .-% of the absorption structure) of superabsorbent gelling polymers enclosed in an absorption structure should be, and especially where one or more areas the absorption layer comprises more than about 50% by weight of the region, the problem of gel blocking by the swollen particles obstruct the fluid flow can and therefore the ability of the gelling polymers, their full capacity in the desired Absorb period can adversely affect. The U.S. patent 5,147,343 (Kellenberger et al.), Issued September 15, 1992, and U.S. Patent 5,149,335 (Kellenberger et al.), issued September 22 1992, describe superabsorbent gelling polymers in relation on their 'Absorbance-under-load' (AUL) where gelling polymers Fluid (0.9% saline) Absorb under a limiting pressure of 0.3 psi. The revelation each of these patents is hereby incorporated by reference. The Methods for determining AUL are described in these patents. Polymers described there can in the embodiments the present invention may be of particular use as to which areas contain with relatively high proportions of superabsorbent gelling polymers. Especially where high concentrations of superabsorbent, gelling polymer are introduced into the cleaning pad, they have Polymers preferably have an AUL measured according to those in the US patent 5,147,343 methods described, of at least about 24 ml / g, more preferably at least about 27 ml / g after 1 hour; or an AUL measured according to that described in U.S. Patent 5,149,335 Method of at least about 15 ml / g, more preferably at least about 18 ml / g after 15 minutes. The commonly assigned pending U.S. patent applications Serial Numbers 08 / 219,547 (Goldman et al.), Filed March 29, 1994, and 08 / 416,396 (Goldmann et al.), filed April 6, 1995, both hereby inserted by reference, also deal with the problem of gel blocking and describe superabsorbent gelling polymers that help in coping with these phenomena Are benefits. These applications specifically describe superabsorbent, gelling polymers, especially gel blocking at even higher limiting pressures 0.7 psi, avoid. In the embodiments of the present invention, where the absorption layer contains areas which high levels (e.g., greater than about 50% by weight of the range) of superabsorbent gelling polymer, it may be preferred that the superabsorbent gelling polymer as in the aforementioned Goldman et al. is described.

In addition to contributing to total fluid absorption the superabsorbent material also directly influences the absorption rate of the pillow. Thus, the experienced professional will recognize that where superabsorbent, gelling polymers used in particle form by adjusting the average particle size and / or the particle size distribution of the material regulates the fluid absorption rate of the cleaning pad can be.

Other useful superabsorbent materials include hydrophilic polymeric foams, such as those in commonly assigned, pending U.S. Patent Application 08 / 563,866 (DesMarais et al.) Filed November 29, 1995 and U.S. Patent No. 5,387,207 (Dyer et al.), issued February 7, 1995. These references describe polymeric, hydrophilic absorption foams obtained by polymerizing a water-in-oil emulsion with a high internal phase (often referred to as HIPEs). These foams can be easily customized to provide varying physical properties (pore size, capillary suction, density, etc.) that affect fluid handling ability. As such, these materials, either alone or in combination with other such foams or with fibrous structures, are those for the present one Total capacity required by the invention is particularly useful.

Where super absorbent material in of the absorption layer, the absorption layer preferably comprises at least about 15% by weight of the absorption layer, more preferably at least about 20%, even stronger preferably at least about 25% superabsorbent material.

The absorption layer can also consist of or comprise fiber material. Fibers useful in the present invention include those that occur naturally (modified or unmodified), as well as synthetically produced fibers. Examples of suitable unmodified / modified naturally occurring fibers include cotton, esparto grass, bagasse, awn, flax, silk, wool, wood pulp or pulp, chemically modified wood pulp, jute, ethyl cellulose and cellulose acetate. Suitable synthetic fibers can be made from polyvinyl chloride, polyvinyl fluoride, polytetrafluoroethylene, polyvinylidene chloride, polyacrylics such as ORLON ^®, polyvinyl acetate, RAYON ^®, polyethylvinyl acetate, (z. B. PULPEX ^®) nondissolving or soluble polyvinyl alcohol, polyolefins such as polyethylene and polypropylene, polyamides such as nylon , Polyesters such as DACRON or KODEC, polyurethanes, polystyrenes and the like. The absorption layer can only naturally occurring fibers, only synthetic fibers; or any compatible combination of naturally occurring and synthetic fibers.

The fibers useful herein can be hydrophilic, hydrophobic fibers, or a combination of both hydrophilic and hydrophobic fibers. As indicated above, the particular choice of hydrophilic or hydrophobic fibers will depend on the other materials included in the absorption layer (and in some ways the scrubbing layer). That is, the nature of the fibers is such that the cleaning pad exhibits the necessary fluid retardation and overall fluid absorbency. Suitable hydrophilic fibers for use in the present invention include cellulose fibers, modified cellulose fibers, rayon, polyester fibers such as hydrophilic nylon (HYDROFIL ^® ). Suitable hydrophilic fibers can also be obtained by hydrophilizing hydrophobic fibers, such as from surfactant-treated or silica-treated thermoplastic fibers, which are derived, for example, from polyolefins, such as polyethylene or polypropylene, polyacrylic materials, polyamides, polystyrenes, polyurethanes and the like.

Suitable wood pulp fibers can be found in general known chemical processes, such as the Kraft and sulfite processes, be preserved. It is particularly preferred to use these wood pulp fibers from southern softwoods derived from their first-class absorbency characteristics. These wood pulp fibers can also by mechanical processes, such as wood flour, mechanical refiner, thermomechanical, chemical-mechanical and chemical-thermomechanical Pulp or pulp processes can be obtained. Recycled or secondary wood pulp fibers, as well as bleached and unbleached wood pulp fibers can be used become.

Another type of hydrophilic fiber are chemically stiffened for use in the present invention Cellulose fibers. As used herein, the term "chemically stiffened cellulosic fibers" means cellulosic fibers which by taking chemical means to increase the stiffness of the fibers both dry and watery Conditions were stiffened. Such means exclude the addition a chemical stiffener, for example the Fibers covered and / or impregnated. Such means can also stiffening the fibers by changing the chemical structure, z. B. include by lacing polymer chains.

Where fibers as an absorption layer (or as a structural component thereof) can be used Fibers optionally combined with a thermoplastic material become. At least one tell of this thermoplastic migrates during melting Material to the intersection of the fibers, typically as a result the fiber-to-fiber capillary gradient. These intersections will be to binding sites for the thermoplastic material. When they cool down, they solidify thermoplastic materials at these intersections to form the Arrest sites which are the matrix or the fibrous tissue in each hold the relevant layers together. This can be in the providence an additional overall integrity be beneficial with the cleaning pad.

Among the various effects, sticking at the fiber intersections increases the overall compression modulus and strength of the resulting thermally bonded part. A case of chemically stiffened cellulosic fibers, the melting and migration of the thermoplastic material also has the effect of increasing the average pore size of the resulting fabric while maintaining the density and basis weight of the fabric in its original form. This can affect the fluid acquisition properties of the thermally bonded fabric when initially exposed to fluid due to the improved fluid permeability, and subsequently when due to the combined ability of the stiffened fibers to maintain their stiffness in wetting and the ability of the thermoplastic material at the fiber intersections in wetting and staying attached to each other in wet compression improves. On the net, thermally bonded fabrics made from stiffened fibers retain their original total volume with, but the volumetric regions previously occupied by the thermoplastic material open and thus increase the average capillary pore size between the individual fibers.

Useful in the present invention thermoplastic materials can a variety of shapes, including particles, fibers, or Have combinations of particles and fibers. thermoplastic Fibers are a particularly preferred form because of their ability to form numerous arrests between the individual Fibers. Suitable thermoplastic materials can be made from any thermoplastic Polymer are produced, which are melted at temperatures which can be the fibers, the main fabric or the matrix of each single layer, do not damage to a large extent. The melting point is preferably of this thermoplastic material less than about 190 ° C, and preferably about 75 ° C up to about 175 ° C. In any case, the melting point of this thermoplastic material not be lower than the temperature at which the thermal arrested absorption structures when used in the cleaning pad will probably be stored. The melting point of the thermoplastic Material is typically no lower than about 50 ° C.

The thermoplastic materials, and in particular the thermoplastic fibers, can be from a variety of thermoplastic polymers, including polyolefins such as polyethylene (eg. B. PULPEX ^®) and polypropylene, polyesters, Capolyestern, polyvinyl acetate, polyethylvinyl acetate, polyvinyl chloride, polyvinylidene chloride, polyacrylics, polyamides, Copolyamides, polystyrenes, polyurethanes and copolymers of any of the foregoing, such as vinyl chloride / vinyl acetate and the like. Depending on the desired characteristics for the resulting thermally bonded absorbent member, suitable thermoplastic materials include hydrophobic fibers that have been rendered hydrophilic, such as surfactant-treated or silica-treated thermoplastic fibers, such as those of polyolefins such as polyethylene or polypropylene, polyacrylic materials, polyamides, polystyrenes, polyurethanes and the like, are derived. The surface of the hydrophobic thermoplastic fiber can be made hydrophilic by treatment with a surfactant, such as a nonionic or anionic surfactant, e.g. By spraying the fiber with a surfactant, by immersing the fiber in a surfactant, or by including the surfactant as part of the polymer melt in the manufacture of the thermoplastic fiber. As it melts and reconsolidates, the surfactant tends to remain on the surfaces of the thermoplastic fiber. Suitable surfactants include nonionic surfactants such as Brij ^® 76 manufactured by ICI Americas, Inc. of Wilmington, Delaware, and various surfactants sold under the trade name PEGOSPERSE ^®, trademark by Glyco Chemical, Inc. of Greenwich, Connecticut, a , In addition to nonionic surfactants, anionic surfactants can also be used. These surfactants can be applied to the thermoplastic fibers in proportions of, for example, about 0.2 to about 1 g per square centimeter of thermoplastic fiber.

Suitable thermoplastic fibers can from a single polymer (single-component fibers) or they can made from more than one polymer (e.g. two-component fibers) become. As used herein, "bicomponent fibers" refers to thermoplastic fibers, which comprise a core fiber formed from a polymer, that of a thermoplastic sheath made of another polymer is enclosed. That is the wrapping Comprehensive polymer often melts at another, typically lower one Temperature than that. No comprehensive polymer. As a result of that these two-component fibers ensure thermal adhesion as a result melting of the coating polymer under Maintaining the desired Strength characteristics of the core polymer.

Suitable two-component fibers for Sheath / core fibers can be used with the present invention include the following polymer combinations: polyethylene / polypropylene, Polyethylene vinyl acetate / polypropylene, polyethylene / polyester, polypropylene / polyester, Copolyester / polyester and the like. Particularly suitable thermoplastic Two component fibers for use herein are those with a polypropylene or polyester core and a lower melting point Copolyester, polyethylene vinyl acetate or polyethylene sheath (e.g. B. that of Danaklon as Chisso Corp. available and CELBOND®, available from Hercules). These two-component fibers can be concentric or eccentric his. As used herein, the terms "concentric" and "eccentric" refer to whether the envelope is one Has thickness that is uniform or is uneven across the Cross-sectional area of the two-component fiber. eccentric Two-component fibers can he wishes be to provide more compression strength with less Fiber thicknesses.

Process for the production of thermal arrested fiber materials are in pending U.S. patent application series No. 08 / 479,096 (Richards et al.), Filed July 3, 1995 (see in particular Pages 16-20), and U.S. Patent 5,549,589 (Homey et al.) on August 27, 1996 (see in particular columns 9 to 10). The disclosure of both documents is hereby also included by reference.

The absorption layer can also comprise a HIPE-derived hydrophilic polymer foam which is not highly absorbent speed described above as "superabsorbent materials". Such foams and methods of making them are described in U.S. Patent 5,550,167 (DesMarais), issued August 27, 1996; and commonly assigned pending U.S. Patent Application Serial No. 08 / 370,695 (Stone et al.), filed January 10, 1995. Both documents are hereby included by reference.

The absorption layer of the cleaning pad can consist of a homogeneous material, such as a mixture of Cel ulosefasem (optionally thermally bonded) and particulate, swellable, superabsorbent gelling polymer. Alternatively, the absorption layer from discrete layers of material, such as a layer of thermally air-laid material and a discrete layer of superabsorbent Material. For example, a thermally bonded layer of cellulose fibers may be arranged lower than (i.e. below) the superabsorbent material (i.e. between the superabsorbent Material and the abrasive layer). To have a high absorption capacity and restraint of liquids to achieve under pressure while providing an initial delay with the liquid intake, it may be preferred to form such discrete layers to use the absorption layer. In this regard, it can superabsorbent material provided away from the scrubbing layer by including a less absorbent layer as the bottom aspect of the absorption layer. For example a layer of cellulose fibers deeper than (i.e. below) that see below perabsorbent material (i.e. between the superabsorbent Material and the abrasive layer) may be provided.

In a preferred embodiment comprises the absorption layer is a thermally bonded, air-laid fabric made from cellulose fibers (Flint River, available from Weyerhaeuser, Wa) and AL Thermal C (thermoplastic, available from Danaklon a / s, Varde, Denmark), and a swellable, hydrogel-forming, superabsorbent polymer. The super absorbent Polymer is preferably introduced so that a discrete layer near the surface the absorption layer is arranged; which of the scouring layer is located remotely. Preferably a thin layer of e.g. B. cellulose fibers (optionally thermally bonded) above the superabsorbent, gelling polymer for reinforcement of inclusion.

iii. optional additional layer

The cleaning pads of the present Invention preferably have an additional layer, which is a connection the cushion with the handle of the device or the support head on preferred devices allows. The additional layer is required in such embodiments, where an absorption layer is used, but not for fastening of the pillow on the support head the handle is suitable. The additional layer can also be used as a Means for preventing fluid flow through the top surface (i.e. H. the surface in contact with the handle) of the cleaning pad and can continue for improved integrity of the pillow. How the abrasion and absorption layers can the additional layer of a single-layer or multi-layer structure exist as long as it meets the above requirements.

In a preferred embodiment of the present invention the additional layer is a surface, the mechanically on the carrier head of the Handle using known hook and loop technology can be attached. In such an embodiment, the additional layer comprises at least one surface, which is mechanically attached to hooks that are permanently attached to the bottom of the carrier head of the handle are attached.

To the desired fluid impermeability and To achieve attachability, it is preferred that a laminated Structure which z. B. a meltblown film and non-woven Includes fiber structure is applied. In a preferred embodiment the additional layer is a three-layer material with one layer Made of meltblown polypropylene film between two layers made of polypropylene spunbond is provided.

III. Reinigunsgkissen

While the cleaning pads of the present development are particularly suitable for use in the cleaning devices described above, the ability to regulate fluid absorption followed by the subsequent intake and retention of significant amounts of fluid gives the cleaning pads a utility apart from their combination with a handle Form a device like a pug. As such, the cleaning pads can be used even without being attached to a handle. These can therefore be constructed without the requirement that they can be attached to a handle. However, it may be useful to design the cleaning pads so that they can be used either in combination with your handle or as a standalone product. It may be preferred to manufacture the pillows with an optional additional layer. In all other aspects, the standalone cleaning pad is essentially as described above. Of course, where the cleaning pad for cleaning hard surfaces with smaller dimensions than household floors (e.g. countertop surfaces, pouring basins, cooking surfaces chen, (bath tubs etc.) is determined, such pillows are produced with relatively low overall capacities.

IV. Other aspects and specific embodiments the invention

If the cleaning pad is made of discrete layers is composed, can the different layers using any means, which the pillow with sufficient integrity during the cleaning process equipped to be arrested among themselves. The scouring and additional layers can when present with the absorption layer or with each other through any variety of arrests, including the Use an even continuous Layer of adhesive, a patterned layer of adhesive or arrested by any arrangement of separate lines, spirals, or swabs of adhesive become. Alternatively, you can the arrest means heat bonds, Pressure bonding, ultrasound bonding, dynamic mechanical bonding or any other suitable means of arrest or combination these include arrest agents as known in the art are. Arrest can be around the circumference of the cleaning pad (e.g. B. with heat sealing the Scouring layer and the optional additional layer) and / or over the area (i.e. the X-Y plane) of the cleaning pad so as to form a pattern on the surface of the Form cleaning pad. Arresting the layers of the cleaning pad with ultrasonic bonds over the area of the Pillow provides integrity to avoid shearing off the individual pillow layers during the Application.

The cleaning pad of the present Invention is for restraint capable of absorbing fluid even during the one exercised during the cleaning process Pressures. This is referred to herein as the ability of Cleaning pad to avoid "squeezing" absorbed fluid, or vice versa its ability for reluctance of absorbed fluid under pressure. The procedure for Measuring the squeeze is described in the "Test Procedure" section. In short, the test measures that ability one saturated Restraint cleaning pad of fluid at 1.72 kPa (0.25 psi) pressure. The Cleaning pads of the present invention preferably have a squeeze value of not higher than about 40%, more preferably not greater than about 25%, even more preferred from not higher than about 15%, and the strongest preferably from not higher than about 10%.

The cleaning device of the present invention is preferably used in combination with a cleaning solution. The cleaning solution can from any known hard cleaning composition surfaces consist. Hard surface cleaning compositions are typically solutions on an aqueous basis, the one or more surfactants, solvents, builders, Complexing agents, polymers, foam suppressants, enzymes etc. include. Close suitable surfactants anionic, nonionic, zwitterionic, amphoteric and canonical Surfactants. Examples of anionic Close surfactants one, but are not limited on, linear alkylbenzenesulfonates, alkyl sulfates, alkyl sulfonates and the same. examples for close nonionic surfactants Alkyl ethoxylates, alkyl phenol ethoxylates, alkyl polyglucosides, alkyl glucamines, Sorbitan esters and the like. Examples of zwitterionic surfactants include betaines and sulfobetaines. Examples of amphoteric surfactants include materials a using imidazole chemistry such as alkyl amphoglycinates and alkylimine propionate. Examples of cationic Close surfactants Alkyl mono-, di- and triammonium surfactants. All of the above Materials are commercially available and in Volume 1 of McCutcheon: "Emulsifiers and Detergents" Detergent), North American Ed., McCutcheon Division, MC Publishing Co, 1995.

Suitable solvents include short chain (e.g. C ₁ -C ₆ ) derivatives of oxyethylene glycol and oxypropylene glycol, such as mono- and diethylene glycol nhexyl ether, mono-, di- and tripropylene glycol n-butyl ether and the like. Suitable builders include those derived from phosphorus sources, such as orthophosphate and pyrophosphate, and non-phosphorus sources, such as nitrile triacetic acid, S, S-ethylenediaminedisuccinic acid and the like. Suitable complexing agents include ethylenediaminetetraacetic acid and citric acid and the like. Suitable polymers include those that are anionic, cationic, zwitterionic, and nonionic. Suitable suds suppressors include silicone polymers and C ₁₀ -C ₁₈ linear or branched fatty acids or alcohols. Suitable enzymes include lipases, proteases, amylases and other enzymes known for their utility in catalyzing soil degradation.

(. Eg Neodol 91-5 ^®, available from Shell Chemical Co.) to about 2.0% A suitable cleaning solution for use with the present apparatus comprises a linear Alkoholethoxylattensids about 0.1; about 0 to about 2.0% of an alkyl sulfonate (e.g., Bioterge PAS-8s, a linear C ₈ sulfonate available from Stepan Co.); about 0 to about 0.1% potassium hydroxide; about 0 to about 0.1% potassium carbonate or bicarbonate; about 0 to about 10% organic acids; optional auxiliaries, such as dyes and / or perfumes; and from about 99.9% to about 90% deionized or plasticized water.

Where superabsorbent polymer material is used in the cleaning pad, it is possible to adjust the rate of fluid uptake by adjusting the regulate the pH of the cleaning solution. In particular, where such polymers are present, the cleaning solution preferably has a pH of no more than about 9, preferably a pH of no more than about 7, more preferably a pH of no more than about 5, and most preferably a pH from about 2 to about 5.

Referring to the figures which illustrate representative cleaning pads of the present extension, the 2 a perspective view of a removable cleaning pad 200 which is a scrubbing layer 201 , an additional layer 203 and an absorption layer 205 , which is arranged between the scrubbing layer and the additional layer. As indicated above, while the 2 each of the layers 201 . 203 and 205 represents as a single layer of material, one or more of these layers consist of a laminate of two or more layers. For example, in a preferred embodiment, the scrubbing layer 201 a two-ply laminate of carded polypropylene with the bottom layer longitudinally separated. Furthermore, although not in 2 As shown, materials that do not hinder fluid flow can be between the scrubbing layer 201 and the absorption layer 203 and / or between the absorption layer 203 and the additional layer 205 be provided. However, it is important that the abrasive and absorbent layers are practically in fluid communication with one another in order to ensure the required absorption capacity of the cleaning pad. While the 2 the pillow 200 in a form where all layers of the pillow are of equal size in the X and Y dimensions, it is preferred that the scrubbing layer 201 and the additional layer 205 is larger than the absorption layer, so the layers 201 and 205 can be glued together around the periphery of the pillow to ensure integrity. The abrasive and backing layers can be adhered to the absorbent layer or to each other by any of a variety of adhesives, including the use of a uniform continuous layer of adhesive, a patterned layer of adhesive, or any arrangement of separate lines, spirals or swabs of adhesive. Alternatively, the adhesive may include heat seals, pressure seals, ultrasonic bonds, dynamic mechanical bonds, or any other suitable adhesive or combinations of these adhesives as are known in the art. The adhesive may be around the circumference of the cleaning pad and / or over the surface of the cleaning pad, so a pattern on the surface of the scrubbing layer 201 to build.

The 3 is an exploded view of the absorption layer 305 one embodiment of a cleaning pad of the present invention. The absorption layer 305 is shown in this embodiment as consisting of a three-laminate structure. In particular, the absorption layer 305 represented as consisting of a discrete layer of particulate, superabsorbent, gelling material, represented as 307 that is between two discrete layers 306 and 308 is provided from fiber material. In this embodiment it is because of the area 307 with a high concentration of superabsorbent gelling material preferred that the superabsorbent material show no gel blocking, as explained above. In a particularly preferred embodiment, the fiber layers are 306 and 308 each have a thermally bonded fiber substrate made of cellulose fibers, and the lower fiber layer 308 is in direct fluid communication with the scrubbing layer (not shown).

The 4 is a cross-sectional view of the cleaning pad 400 with a scouring layer 401 , an additional layer 403 and an absorption layer 405 , which is arranged between the scouring and additional layer. The cleaning pillow 400 is here with an absorption layer 405 shown, which is smaller in the X and Y dimensions than the abrasive layer 401 and the additional layer 403 , The layers 401 and 403 are therefore shown glued together along the periphery of the cleaning pad. Furthermore, in this embodiment, the absorption layer 405 with two discrete layers 405a and 405b shown. In a preferred embodiment, the top layer is 405a a hydrophilic, polymeric foam material such as that described in commonly assigned copending U.S. Patent Application Serial No. 08 / 563,866 (DesMarais et al.), filed November 29, 1995; and the bottom layer 405b is a polymeric foam material such as that described in U.S. Patent 5,550,167 (DesMarais), issued August 27, 1996; or that in commonly assigned pending U.S. Patent Application Serial No. 08 / 370,695 (Stone et al.), filed January 10, 1995. As discussed above, any of the layers can be 405a and 405b are formed using two or more individual layers of the respective material.

The 7 is an exploded perspective view of a cleaning pad 600 with an optional scrim material 602 , This scrim material 602 is as a separate material between the scouring layer 601 and the absorption layer 605 is provided. In another embodiment, the scrim 602 in the form of a printed resin or other synthetic material on the scrubbing layer 601 (preferably the top surface) or the absorption layer 605 (preferably the lower surface). The 7 also provides an optional additional layer 603 represents that above the absorption layer 605 is provided. As explained above, the scrim ensure improved cleaning of dirt that is not easily solubilized by the cleaning solution used, if used. The relatively open structure of the scrim 602 sees the necessary fluid connection between the scrubbing layer 601 and the absorption layer 605 to provide the required absorption rates and capacity. While the 7 again each of the layers 601 . 603 and 605 represents as a single material layer, one or more of these layers can consist of two or more layers. While the 7 the pillow 600 so that all layers of the pillow have the same size in X and Y dimensions, it is preferred that the scrubbing layer 601 and the additional layer 603 are larger than the absorption layer, so the layers 601 and 603 around the periphery of the pillow 600 can be glued together to provide integrity. It may also be preferred that the scrim material 602 has the same size in at least one of the X and Y dimensions to prevent sticking to the periphery of the pad with the abrasive layer 601 and the additional layer 603 to facilitate. This is particularly preferred if the scrim material is a separate layer (ie is not printed on a substrate). In the embodiments where the scrim is created by printing, e.g. For example, a resin on a substrate, it may not matter that the scrim is arranged to be part of the connection at the periphery. The scouring layer 601 , the scrim 602 and the additional layer 603 can be adhered to the absorbent layer or to each other by a variety of adhesives, including using a uniform continuous layer of adhesive, a patterned layer of adhesive, or an array of separate lines, spirals, or swabs of adhesive. Alternatively, the attachment means may include heat seals, pressure seals, ultrasound bonds, dynamic mechanical bonds, or any other suitable attachment means or combinations of these attachment means as are known in the art. The attachment can take place around the circumference of the cleaning pad and / or over the surface of the cleaning pad, so as to create a pattern on the surface of the abrasive layer 601 to build.

The 8th is a perspective view of a preferred embodiment of a pillow 700 that's a scrim 702 includes. The 8th shows an absorption layer 705 , an additional layer 703 and a scrubbing layer 701 that is partially cut off to represent the scrim 702 to facilitate. (The scrim 702 can be a separate material layer or can be a component of either the scrubbing layer or the absorption layer.) The pillow 700 is with a lower surface in contact with the hard surface 700a and an upper surface in contact with the device 700b shown. The pillow 700 has two opposite side edges 700c that correspond to the "X" dimension of the pillow and two opposite end edges 700d that correspond to the "Y" dimension of the pillow. (In use goes where the pillow 700 is rectangular in the X-Y dimension, the typical cleaning movement generally in the "backward or forward direction" as indicated by the arrow 710 As illustrated, in this preferred embodiment the scrim extends 702 to the end edges 700d to arrest with the extra layer 703 and the scouring layer 701 enable (although not shown as such) is the absorption layer 705 preferably shorter in the X and Y dimensions, which will facilitate the adhesion of the scrim and the attachment and abrasive layers). However, the scrim extends 702 not to the side edges 700e , The end of the scrim 702 in front of the side edges 700e provides the pillow 700 with the areas 711 the scouring layer 701 which is not the texture of the scrim 702 have and are therefore relatively smooth. These smooth areas 711 enable the even removal of dirt solution during the wiping process.

V. Test procedure

A. Performance under pressure

This test determines the gram / gram absorption capacity and the average absorption rate in g / s of deionized water for the Cleaning pad, the side in a piston / cylinder arrangement under a beginning Limiting pressure of 0.09 psi (about 0.6 kPa) is limited. (In dependence The limit pressure can depend on the composition of the cleaning pad sample slightly decrease to the extent how the sample absorbs water and swells during the time of the test.) The goal of the test is to evaluate the average rate, with which a cleaning pillow fluid during a practical period absorbed when the pillow application conditions (horizontal Suction and pressure) is exposed.

The test fluid for the PUP capacity test is ionized Water. This fluid is caused by the cleaning pad under need (Demand) absorption conditions at a hydrostatic pressure absorbed from near zero.

A suitable device 510 for this test is in 5 shown. A fluid reservoir is located at one end of this device 512 (like a petri dish) with a cover 514 , The reservoir 512 sits on an analytical balance, commonly referred to as 516 is specified. The other end of the device 510 is a general as 518 designated sinter judge, one commonly known as 520 designated piston / cylinder arrangement in the funnel 518 fits, and a cylindrical sintered plastic hopper cover, commonly called 522 denotes the one over the funnel 518 fits and is open on the bottom and closed on the top, with the upper part being provided with a pinhole. The device 510 has a system for the transport of fluid in each direction, which consists of the sections of a glass capillary tube system, indicated as 524 and 531a , a flexible plastic tube system (e.g., a 1/4 inch inner diameter and 3/8 inch outer diameter Tygon tube system), expressed as 531b , of shut-off valve arrangements 526 and 538 and Teflon connectors 548 . 550 and 552 for connecting the glass tube system 524 and 531a and from the stopcock assemblies 526 and 538 consists. The shut-off valve arrangement 526 consists of a 3-way valve 528 , a glass capillary tube system 530 and 534 in the main fluid system, and a section of a glass capillary tube system 532 to refill the reservoir 512 and to continue rinsing the frit in the sinter funnel 518 , The shut-off valve arrangement 538 also consists of a three-way valve 540 , a glass capillary tube system 542 and 546 in the main fluid line and a section of a glass capillary tube system 544 which acts as a deduction for the system.

Referring to the 6 there is the order 520 from a cylinder 554 , a cup-shaped piston indicated by 556 , and a weight 558 that in the piston 556 fits. At the bottom of the cylinder 554 is appropriate 400 -Mesh screen made of stainless steel 559 which is pulled biaxially taut before fastening. The generally as 560 specified cleaning pad sample sits on the sieve 559 , the surface in contact (or scouring) layer with the screen 559 is in contact. (If the sample from which the cleaning pad is cut is such that both surfaces thereof are to be in contact with the surface during the cleaning process, the surface primarily intended for the initial scouring action should be with the filter screen 559 stay in contact. The cleaning pad sample is a circular sample with a diameter of 5.4 cm. (During the rehearsal 560 is shown as a single layer, the sample actually consists of a circular sample, in which all layers are contained by the cushion from which the sample is cut.) The cylinder 554 is drilled by a transparent LEXAN ^e rod (or equivalent) and has an inner diameter of 6.00 cm (area = 28.25 cm), with a wall thickness of approximately 5 mm and a height of approximately 5 cm. The piston 556 has the shape of a teflon cup and is processed so that it fits into the cylinder 554 fits within tight tolerances. The cylindrical weight 558 Stainless steel is machined so that it is in the piston 556 fits snugly, and is equipped with a handle on the top (not shown) for easier removal The common weight from pistons 556 and weight 558 is 145.3 g, which corresponds to a pressure of 0.09 psi for an area of 22.9 cm².

The components of the device 510 are dimensioned such that the flow rate of deionized water through them under a 10 cm hydrostatic pressure is at least 0.01 g / cm² / s, the flow rate through the area of the sintered funnel 518 is standardized. Factors that particularly affect the flow rate are the permeability of the frit in the sinter funnel 518 and the inner diameter of the glass tube system 524 . 530 . 534 . 542 . 546 and 531a , as well as the shut-off valve 528 and 540 ,

The reservoir 512 is on an analytical balance 516 provided that is accurate to at least 0.01 g with a deviation of less than 0.1 g / h. The balance is preferably interfaced with a computer via software which (i) can monitor the change in balance weight at preset time intervals from the start of the PUP test and (ii) can be set so that it automatically changes when the weight changes to 0, 01 - 0.05 g initiated depending on the sensitivity of the balance. That in the reservoir 512 leading capillary tube system 524 shouldn't be with the bottom of it or the cover 514 be in touch. The volume of fluid (not shown) in the reservoir 512 should be sufficient so that air does not enter the capillary tube system during the measurement 524 is attracted. The fluid level in the reservoir 512 should start about 2 mm below the top surface of the frit in the sinter funnel at the start of measurement 518 lie. This can be demonstrated by placing a small drop of liquid on the frit and slowly flowing it back into the reservoir 512 monitored gravimetrically. This height should not change significantly if the piston / cylinder arrangement 520 in the funnel 518 is positioned. The reservoir should have a sufficiently large diameter (e.g.? 14 cm) so that the withdrawal of approximately 40 ml portions leads to a change in the fluid height of less than 3 mm.

Before the measurement, the arrangement is filled with deionized water. The frit in the sinter funnel 518 is rinsed further so that it is filled with fresh deionized water. Air bubbles are removed as far as possible from the bottom surface of the frit and from the system that connects the funnel to the reservoir. The following procedures are performed by sequentially operating the three-way stopcocks.

• 1. Excess liquid on the top surface of the frit will come out of the sinter funnel 518 removed (e.g. poured).
• 2. Raw / weight of the solution of the reservoir 512 are set to the correct height / value.
• 3. The sinter funnel 518 will be correct Height in relation to the reservoir 512 positioned.
• 4. The sinter funnel 518 is then covered with a sinter funnel 522 covered.
• 5. The reservoir 512 and the sinter funnel 518 are with the valves 528 and 540 the shut-off valve arrangements 526 and 538 equilibrated in the open connection position.
• 6. The valves 528 and 540 are then closed.
• 7. The valve 540 is then switched so that the funnel to the drainage tube 544 is open.
• 8. The system is for Equilibrate in this position for 5 minutes calmly.
• 9. The valve 540 is then returned to its closed position.

Steps 7 - 9 temporarily "dry" the surface of the sinter funnel 518 by having a slight hydrostatic suction of? 5 cm is exposed. This suction is created when the open end of the tube 544 to about 5 cm below the height of the frit in the sinter funnel 518 extends and is filled with deionized water. Typically, ⁓ 0.04 g of fluid is withdrawn from the system during this procedure. This procedure prevents premature absorption of deionized water when the piston / cylinder assembly 520 in the sinter funnel 518 is positioned. The amount of fluid withdrawn from the sinter funnel in this procedure (referred to as the sinter funnel correction weight or "Wffc") is determined by performing the PUP test (see below) for a period of 20 minutes with no piston / cylinder assembly 520 measured. Virtually all of the fluid withdrawn from the sinter funnel by this procedure is very quickly reabsorbed by the funnel when the test is initiated. It is therefore necessary to subtract this correction weight from the fluid weights removed from the reservoir during the PUP test (see below).

A round die cut sample 560 is dipped into a petri dish containing approximately 1 g of deionized water for about 1 second and then immediately placed in a cylinder 554 given. The piston 556 is in the cylinder 554 pushed and on top of the cleaning pad sample 560 positioned. The piston / cylinder arrangement 520 is on top of the sintered part of the funnel 518 placed the weight 558 is in the piston 556 pushed, and the top of the funnel 518 then with the sinter funnel cover 522 covered. After the balance reading has been checked for stability, the test is started by opening the valves 528 and 540 initiated so the funnel 518 and the reservoir 512 connect to. With automatic initiation, data acquisition begins immediately after the funnel 518 Fluid begins to absorb again.

The data is recorded over a period of 1200 seconds (20 minutes). The PUP absorption capacity is determined as follows: t 1200 Absorption capacity (g / g) = [W r (t = o) - Wr (T = 1200) - Wffc] / Wds where t ₁₂₀₀ absorption capacity is the g / g capacity of the pillow after 1200 seconds, Wr _{(t = 0) is} the weight in grams of the reservoir 512 before initiation, Wr _{(t = 1200) is} the weight in grams of the reservoir 512 is 1200 seconds after initiation, Wffc is the sinter funnel correction weight and Wds is the dry weight of the cleaning pad sample.

B. Squeezing

The ability of the cleaning pad to Retain fluid upon exposure to service pressures and prevent fluid "squeezing" is another important parameter for the present invention. The "squeezing" is on the whole Cleaning pads determined by determining the amount of fluid that from the sample with Whatman filter paper at pressures of 0.25 psi (1.5 kPa) can be dabbed. The squeezing is done on a sample, the up to capacity was saturated with deionized water using horizontal suction (especially by suction from the surface of the pillow coming from the Abrasion layer or the layer in contact with the surface). (A means of getting a saturated Sample is in as the horizontal gravimetric suction method the US patent application serial no. 08/542497 (Dyer et al.) on October 13, 1995 and hereby incorporated by reference. The fluid one Sample is placed horizontally in a device which is suitable for the concerned pressures can worry, preferably using an air-filled bag, the for one evenly distributed Pressure over the surface the rehearsal. The squeeze value is called the weight of the test liquid lost per weight of wet sample.

Claims (14)

Cleaning device comprising: a. a handle; and b.a removable cleaning pad comprising: i a scrubbing layer; ii. an absorption layer; and iii. optionally a scrim material, the cleaning pad having an average deionized water absorption rate of no more than 0.5 g / s and a t ₁₂₀₀ absorption capacity of at least 1 g deionized water per g of the cleaning pad and the abrasive layer in direct fluid communication with the absorption layer stands. Cleaning device according to claim 1, characterized in that the removable cleaning pad has a t ₁₂₀₀ absorption capacity of at least 5 g of deionized water per g of the cleaning pad. Cleaning device according to at least one of the preceding claims, characterized in that the removable cleaning pad has a t ₁₂₀₀ absorption capacity of at least 10 g of deionized water per g of the cleaning pad. The cleaning device according to at least one of the preceding claims, characterized in that the removable cleaning pad has a t ₁₂₀₀ absorption capacity of at least 20 g of deionized water per g of the cleaning pad. cleaner according to at least one of the preceding claims, characterized in that the removable cleaning pad has an average absorption rate for deionized Water of not more than 0.1 g / s. cleaner according to at least one of the preceding claims, characterized in that the cleaning device a carrier head has, which is pivotable on a by means of a joint arrangement End of the handle is attached. cleaner according to at least one of the preceding claims, characterized in that the absorption layer comprises a superabsorbent material, preferably chosen from the group consisting of superabsorbent gelling polymers and hydrophilic, polymeric absorbent foams. cleaner according to at least one of the preceding claims, characterized in that the cleaning pad further has an additional layer that a connection of the cleaning pad with the handle of the device or the carrier head allows and characterized in that the Absorbent layer between the scouring layer and the additional layer is positioned. cleaner according to claim 8, characterized in that the additional layer comprises a material which is essentially impermeable to fluids. A cleaning pad comprising: i a scrubbing layer; ii. an absorption layer; and iii. optionally a scrim material, the cleaning pad having an average absorption rate for deionized water of not more than 0.5 g / s and a t ₁₂₀₀ absorption capacity of at least 1 g deionized water per g of the cleaning pad, and the abrasive layer is in direct fluid communication with the absorption layer. Cleaning pad according to claim 10 with an average Absorption rate for deionized water of not more than 0.1 g / s. Cleaning pad according to claim 10 or 11, characterized in that it has a t ₁₂₀₀ absorption capacity of at least 1 g of deionized water per g of the cleaning pad, preferably at least 5 g, more preferably at least 10 and most preferably at least 20 g of deionized water per g of the cleaning pad , Cleaning pad according to at least one of claims 10 to 12, characterized in that it is a substantially fluid impermeable additional layer for mechanically attaching the cleaning pad to a handle a cleaning device and the absorption layer between the abrasive layer and the additional layer is positioned. Cleaning pad according to at least one of claims 10 to 13, characterized in that the Absorbent layer comprises a superabsorbent material, preferably selected from the group consisting of superabsorbent gelling polymers and hydrophilic polymeric absorbent foams.