MX2014011398A

MX2014011398A - Articles of manufacture and methods for making same.

Info

Publication number: MX2014011398A
Application number: MX2014011398A
Authority: MX
Inventors: Charles William Neal; David Dale Mckay
Original assignee: Procter & Gamble
Priority date: 2012-04-02
Filing date: 2013-03-28
Publication date: 2014-11-25
Also published as: US20130255015A1; CA2869443A1; WO2013151849A1; EP2834412B1; EP2834412A1

Abstract

Soil adsorbing agent-containing articles of manufacture that provide superior mirror cleaning properties compared to known soil adsorbing agent-containing articles of manufacture, are provided.

Description

MANUFACTURING ARTICLES AND METHODS TO MANUFACTURE THEM FIELD OF THE INVENTION The present invention relates to articles of manufacture, more particularly to articles of manufacture which contain dirt absorbing agent, such as dry fibrous structures which provide superior mirror cleaning properties as compared to known articles containing known soil absorbing agent.

BACKGROUND OF THE INVENTION Fibrous structures, such as paper towels, have been commonly used in the past in combination with liquid cleaning compositions for window cleaning, mirrors, kitchen countertops and other hard surfaces. Typically, known paper towels provide a cleaning performance, primarily, by absorbing dirt-laden fluids into the pores of the paper towel; consequently, the cleaning performance of the known paper towels is limited by the ability and ability of the paper towels to absorb and retain the dirt-laden fluid.

It is known that articles of manufacture, such as fibrous structures, e.g. eg, paper towels comprising 6 # / ton or more of a soil absorbing agent have a mirror densitometer value 2 greater than the mirror densitometer value 1, measured according to the mirror cleaning test method. described in the present description.

Moreover, it is known that articles of manufacture, such as fibrous structures, e.g. eg, paper towels comprising less than 6 # / ton of a dirt absorbing agent have a mirror densitometer value 2 greater than the mirror densitometer value 1, measured according to the mirror cleaning test method. described in the present description and a difference between the mirror densitometer value 2 and the mirror densitometer value 1 of -0.21 or less.

Moreover, it is known that articles of manufacture, such as fibrous structures, e.g. eg, paper towels comprising less than 6 # / ton of a dirt absorbing agent have a mirror densitometer value 2 greater than their mirror densitometer value 1, measured according to the mirror cleaning test method. described in the present description and a sum of the mirror densitometer value 2 and the mirror densitometer value 1 of -0.48 or less, measured according to the mirror cleaning test method.

The prior art articles of manufacture described above do not yet satisfy consumer desires for improved mirror cleaning in at least the first and second mirrors, measured according to the mirror cleaning test method described in present description.

In light of the above, it is clear that there is a need to achieve an article of manufacture, such as a fibrous structure, more particularly, a dry fibrous structure, such as a paper towel, exhibiting superior mirror cleaning properties in comparison with known articles of manufacture.

BRIEF DESCRIPTION OF THE INVENTION The present invention meets the needs described above by providing an article of manufacture, such as a fibrous structure, for example, a dry paper towel, exhibiting improved cleaning properties of several hard surfaces, including mirrors, as compared to articles of known manufacture.

In one example of the present invention, an article of manufacture comprising more than 0 # / ton to less than 6 # / ton of a soil absorbing agent is provided, wherein the article of manufacture has a mirror densitometer value. greater than the mirror densitometer value 1, measured according to the mirror cleaning test method, and wherein the difference between the mirror densitometer value 2 and the mirror densitometer value 1 is greater than -0.20, and wherein the article of manufacture presents a sum of the mirror densitometer value 2 and the mirror densitometer value 1 greater than -0.48, measured according to the mirror cleaning test method.

In another example of the present invention, an article of manufacture, e.g. eg, a fibrous structure is provided, such as a dry fibrous structure comprising more than 0 # / ton to less than 6 # / ton of a dirt absorbing agent, wherein the article of manufacture has a mirror densitometer value 1 greater than -0.25 and wherein the article of manufacture has a mirror densitometer value 2 greater than the mirror densitometer value 1, measured according to the mirror cleaning test method.

In another example of the present invention, an article of manufacture, e.g. eg, a fibrous structure, such as a dry fibrous structure that comprises more than 0 # / ton to less than 6 # / ton or less of a soil absorbing agent having a VOC of less than 20%, wherein the article of manufacture has a mirror densitometer value 2 greater than the value of mirror densitometer 1, measured according to the mirror cleaning test method.

In yet another example of the present invention, an article of manufacture, e.g. eg, a fibrous structure, such as a dry fibrous structure comprising a soil absorbing agent having a total volatile content of less than 55% and / or less than 50% and / or less than 45% and / or less than 40% and / or less than 40% and / or less than 35% and / or less than 25% and / or less than 15%, measured in accordance with the VOC test method described in the present description.

In yet another example of the present invention, an article of manufacture, e.g. eg, fibrous structure, such as a dry fibrous structure comprising a soil absorbing agent, having a moisture content of less than 30% and / or less than 25% and / or less than 20% and / or less than 15%. %, measured according to the VOC test method described in the present description.

In still another example of the present invention, there is provided a method for manufacturing an article of manufacture, e.g. eg, a fibrous structure, such as a dry fibrous structure comprising a soil absorbing agent having a volatile organic carbon content of less than 20% and / or less than 17% and / or less than 15% and / or less than 10% and / or less than 5%, measured according to the VOC test method described in the present disclosure; the method comprises the step of contacting a manufacturing article with a soil absorbing agent having a volatile organic carbon content of less than 20% and / or less than 17% and / or less than 15% and / or less than 10% and / or less than 5%, measured according to the VOC test method described in the present description.

In yet another example of the present invention, a method for manufacturing an article of manufacture, e.g. eg, a fibrous structure, such as a dry fibrous structure comprising a soil absorbing agent having a total volatile content of less than 55% and / or less than 50% and / or less than 45% and / or less than 40% and / or less than 40% and / or less than 35% and / or less than 25% and / or less than 15%, measured in accordance with the VOC test method described in the present disclosure; the method comprises the step of contacting an article of manufacture with less than 5 # / ton of a soil absorbing agent having a total volatile content of less than 55% and / or less than 50% and / or less than 45%. % and / or less than 40% and / or less than 40% and / or less than 35% and / or less than 25% and / or less than 15%, measured in accordance with the VOC test method described in present description.

In still another example of the present invention, there is provided a method for manufacturing an article of manufacture, e.g. eg, a fibrous structure, such as a dry fibrous structure comprising a soil absorbing agent having a moisture content of less than 30% and / or less than 25% and / or less than 20% and / or less than 15%. %, measured according to the VOC test method described in the present description; the method comprises the step of contacting a manufacturing article with a soil absorbing agent having a moisture content of less than 30% and / or less than 25% and / or less than 20% and / or less than 15% , measured according to the VOC test method described in the present description.

In yet another example of the present invention, there is provided a soil absorbing agent composition comprising a first soil absorbing agent having a VOC content greater than 20% and a second agent dirt absorber having a VOC content of less than 20%, measured according to the VOC test method.

In yet another example of the present invention, an article of manufacture, e.g. eg, a fibrous structure, such as a dry fibrous structure comprising a soil absorbing agent composition according to the present invention.

Accordingly, the present invention provides articles of manufacture having improved and / or improved mirror cleaning properties based on mirror densitometer values as compared to known articles of manufacture and methods for making those articles.

BRIEF DESCRIPTION OF THE FIGURES Figure 1 is a schematic representation of a sample of an article of manufacture used in the mirror cleaning test method described in the present disclosure; Figure 2 is a schematic representation of 9 individual measurement locations of the spectrodensitometer on a surface of a mirror for the mirror cleaning test method described in the present disclosure; Figures 3 and 3A are diagrams of a support frame used in the VFS test method described in the present description; Y Figures 4 and 4A are diagrams of the cover of a support frame used in the VFS test method described in the present description.

DETAILED DESCRIPTION OF THE INVENTION Definitions "Manufacturing article", as used in the present description, means any solid material, such as a web, foam structure or particle.

"Plot", as used in the present description, means a fibrous film or structure.

"Fibrous structure", as used in the present description, means a structure comprising one or more fibrous filaments and / or fibers. In one example, a fibrous structure according to the present invention means an ordered array of filaments and / or fibers within a structure to perform a function. Non-limiting examples of fibrous structures of the present invention include paper, fabrics (including woven, knitted and non-woven fabrics) and absorbent pads (eg, for diapers or feminine hygiene products).

Non-limiting examples of processes for manufacturing fibrous structures include known wet laying processes, such as wet laying processes for papermaking, and air laying processes, such as air laying processes for manufacturing of paper. Paper processes of wet laying and / or air laying and / or air laying paper processes typically include a step to prepare a composition comprising a plurality of fibers suspended in a medium, whether wet, more specifically, an aqueous medium, or dry, more specifically, a gaseous medium, such as air. The aqueous medium used for wet laying processes is often mentioned as a mixture of fibers. Then, the fiber composition is used to deposit a plurality of fibers on a forming band or wire so that an embryonic fibrous structure is formed, then of which, the drying and / or cohesiveness of the fibers together produces a fibrous structure. Additional processing of the fibrous structure can be performed in such a way that a finished fibrous structure is formed. For example, in typical papermaking processes, the finished fibrous structure is the fibrous structure that is wound on the reel at the end of papermaking and can then be converted into a finished product, for example, a product of toilet paper.

Another process that can be used to produce the fibrous structures is a melt-blown and / or spin-bond process wherein a polymer composition is spun into filaments and collected on a web to produce a fibrous structure. In one example, a plurality of fibers can be mixed with the filaments before being collected on the web, and / or a plurality of fibers can be deposited on a fibrous structure comprising filaments produced above.

The fibrous structures of the present invention may be homogeneous or they may be layered in the direction perpendicular to the machine direction. If they are stratified, the fibrous structures may comprise at least two and / or at least three and / or at least four and / or at least five layers.

The fibrous structures of the present invention can be coformmed fibrous structures. "Coformed", as used in the present description, means that the fibrous structure comprises a mixture of at least two different components, wherein at least one of the components comprises a filament, such as a polypropylene filament, and at least one other component, different from the first component, comprises a solid additive, such as a fiber and / or a particulate. In one example, a coformmed fibrous structure comprises solid additives, such as fibers, such as absorbent gel making articles and / or wood pulp fibers and / or particulate fillers and / or particles of cohesion of points and / or clays, and filaments, such as polypropylene filaments.

"Solid additive", as used in the present description, means a fiber and / or a particulate.

"Particulate", as used in the present description, means a granular substance or a powder.

"Fiber" and / or "filament", as used in the present description, means an elongate particulate having an apparent length that greatly exceeds its apparent width, i.e., a length to diameter ratio of at least about 10. In For example, a "fiber" is an elongated particulate, as described above, that exhibits a length of less than 5.08 cm (2 inches) and a "filament" is an elongate particulate, as described above, exhibiting a length greater than or equal to 5.08 cm (2 inches).

Typically, the fibers are considered discontinuous in nature. Non-limiting examples of fibers include wood pulp fibers and staple synthetic fibers, such as polyester fibers.

Typically, the filaments are considered continuous or of an almost continuous nature. The filaments are relatively longer than the fibers. Non-limiting examples of filaments include filaments blown and / or spunbond. Non-limiting examples of spinnable articles of manufacture include natural polymers, such as starch, starch derivatives, cellulose and cellulose derivatives, hemicellulose, hemicellulose derivatives, and synthetic polymers including, but not limited to, polyvinyl alcohol filaments and / or filaments derived from polyvinyl alcohol, and thermoplastic polymer filaments, such as polyesters, nylon, polyolefins, such as polypropylene filaments, polyethylene filaments and fibers biodegradable or thermoplastic that can be converted into compost, such as polylactic acid filaments, polyhydroxyalkanoate filaments and polycaprolactone filaments. The filaments may be monocomponent or multicomponent, such as bicomponent filaments.

In an example of the present invention, "fiber" refers to paper fibers. Papermaking fibers useful in the present invention include cellulosic fibers, known as wood pulp fibers. Some wood pulps useful in the present invention are chemical pulps, for example, Kraft, sulphite and sulphate pulps, as well as mechanical pulps that include, for example, crushed wood, thermomechanical pulps and chemically modified thermomechanical pulps. However, chemical pulps may be preferred as they impart a superior tactile feel of softness to the sheets of fabric fabricated therefrom. Pulps derived from deciduous trees (hereinafter referred to as "hardwood") and conifers (hereinafter referred to as "softwood") can be used. Hardwood and softwood fibers can be blended or alternatively deposited in layers to provide a stratified web. In addition, fibers derived from recycled paper, which may contain any or all of the mentioned fiber categories and other non-fibrous articles of manufacture, such as fillers and adhesives used to facilitate the original papermaking process, are useful for the present invention.

In addition to the various wood pulp fibers, other cellulosic fibers such as cotton, rayon, lyocell and bagasse lintents can be used in the present invention. Other sources of cellulose in the form of fibers or that can be spun into fibers include pastures and grain sources.

"Dry manufacturing article", as used in the present description, means an article of manufacture comprising an amount of less than 30% and / or less than 20% and / or less than 15% and / or less than 10% and / or less than 7% and / or less than 5% and / or less than 3% and / or less than 2% and / or less that 1% and / or less than 0.5% by weight of moisture, as measured in accordance with the moisture content test method described in the present disclosure.

"Dry weft", as used in the present description, means a weft comprising an amount less than 30% and / or less than 20% and / or less than 15% and / or less than 10% and / or less than 7% and / or less than 5% and / or less than 3% and / or less than 2% and / or less than 1% and / or less than 0.5% by weight of moisture, as measured in accordance with the moisture content test method described in the present description.

"Dry fibrous structure", as used in the present description, means a fibrous structure comprising an amount less than 30% and / or less than 20% and / or less than 15% and / or less than 10% and / or less than 7% and / or less than 5% and / or less than 3% and / or less than 2% and / or less than 1% and / or less than 0.5% by weight of moisture, as measured in accordance with the moisture content test method described in the present disclosure.

"Sanitary paper product", as used in the present description, means a soft, low density (ie, <0.15 g / cm3) weft useful as a cleaning implement for post urination hygiene and after defecation (toilet paper), for otorhinolaryngological (tissue) discharges, cleaning uses and multifunctional absorbents (absorbent towels) and folded tissue paper sanitary products, such as napkins and / or paper tissues including tissue paper sanitary products Folds that are dosed from a container, such as a box. The sanitary paper product can be wound several times on itself, around a core or without a core, to form a roll of Toilet paper product.

In one example, the sanitary paper product of the present invention comprises a fibrous structure according to the present invention.

The sanitary paper products of the present invention may have a basis weight of between about 10 g / m2 to about 120 g / m2 and / or from about 15 g / m2 to about 110 g / m2 and / or about 20 g / m2. m2 at approximately 100 g / m2 and / or approximately 30 to 90 g / m2. In addition, the paper health product of the present invention may have a basis weight of between about 40 g / m2 to about 120 g / m2 and / or from about 50 g / m2 to about 110 g / m2 and / or about 55 g / m2. g / m2 at approximately 105 g / m2 and / or from approximately 60 to 100 g / m2.

The sanitary paper products of the present invention can have a total dry tensile strength of at least 59 g / cm (150 g / inches) and / or from about 78 g / cm (200 g / inches) to about 394 g / cm (1000 g / inches) and / or from about 98 g / cm (250 g / inches) to about 335 g / cm (850 g / inches). In addition, the sanitary product of the present invention may have a total dry tensile strength of at least 196 g / cm (500 g / inches) and / or from about 196 g / cm (500 g / inches) to about 394 g / cm (1000 g / inches) and / or from approximately 216 g / cm (550 g / inches) to approximately 335 g / cm (850 g / inches) and / or approximately 236 g / cm (600 g / inches) ) at approximately 315 g / cm (800 g / inches). In one example, the sanitary paper product exhibits a total dry tensile strength of less than about 394 g / cm (1000 g / inch) and / or less than about 335 g / cm (850 g / inch). In another example, the sanitary paper products of the present invention may have a total dry tensile strength of at least 196 g / cm (500 g / inches) and / or at least 236 g / cm (600 g / inches) ) and / or at least 276 g / cm (700 g / inches) and / or at least 315 g / cm (800 g / inches) and / or at least 354 g / cm (900 g / inches) and / or at least 394 g / cm (1000 g / inches) and / or from about 315 g / cm (800 g / inches) to about 1968 g / cm (5000 g / inches) and / or about 354 g / cm (900 g / cm) inches) to about 1181 g / cm (3000 g / inches) and / or from about 354 g / cm (900 g / inches) to about 984 g / cm (2500 g / inches) and / or about 394 g / cm (1000 g / inches) at approximately 787 g / cm (2000 g / inches).

The sanitary paper products of the present invention may have a total initial tensile strength of wet tensile strength of at least 118 g / cm (300 g / inches) and / or at least 157 g / cm (400 g / inches) and / or at least 196 g / cm (500 g / inches) and / or at least 236 g / cm (600 g / inches) and / or at least 276 g / cm (700 g / inches) and / or at least 315 g / cm (800 g / inches) and / or at least 354 g / cm (900 g / inches) and / or at least 394 g / cm (1000 g / inches) and / or approximately 118 g / cm ( 300 g / inches) at about 1968 g / cm (5000 g / inches) and / or from about 157 g / cm (400 g / inches) to about 1181 g / cm (3000 g / inches) and / or about 196 g / cm (500 g / inches) to about 984 g / cm (2500 g / inches) and / or from about 196 g / cm (500 g / inches) to about 787 g / cm (2000 g / inches) and / or from about 196 g / cm (500 g / inches) to about 591 g / cm (1500 g / inches).

In another example, the tissue paper health products of the present invention may exhibit a total initial wet tensile strength less than about 78 g / cm (200 g / in) and / or less than about 59 g / cm (150 g / inches) and / or less than about 39 g / cm (100 g / inches) and / or less than about 29 g / cm (75 g / inches).

The sanitary paper products of the present invention may exhibit a density (measured at 14.7 g / cm2 (95 g / inches2)). less than about 0.60 g / cm3 and / or less than about 0.30 g cm3 and / or less than about 0.20 g / cm3 and / or less than about 0.10 g / cm3 and / or less than about 0.07 g / cm3 and / or less about 0.05 g / cm3 and / or from about 0.01 g / cm3 to about 0.20 g / cm3 and / or from about 0.02 g / cm3 to about 0.10 g / cm3.

The sanitary paper products of the present invention can be presented in the form of rolls of sanitary paper product. The rolls of sanitary paper product may comprise a plurality of connected, but perforated sheets of fibrous structure, which may be dispensed separately from the adjacent sheets. In one example, one or more ends of the roll of the paper health product may comprise an adhesive and / or a dry strength agent to mitigate the loss of fibers, especially wood pulp fibers from the ends of the roll of the sanitary product. paper.

The sanitary paper products of the present invention may comprise additives such as softening agents, temporary wet strength agents, permanent wet strength agents, bulk softening agents, lotions, silicones, wetting agents, latexes, especially latexes applied to surface patterns. , dry strength agents such as carboxymethylcellulose and starch, and other types of additives suitable for inclusion in and / or on paper health products.

"Weight average molecular weight", as used in the present description, means the weight average molecular weight Mw (in units of g / mol) as determined by using gel permeation chromatography in accordance with the protocol included in Colloids and Surfaces A. Physico Chemical & Engineering Aspects, Vol. 162, 2000, p. 107-121.

"Numerical average molecular weight", as used in the present description, means the numerical average molecular weight Mn (in units of g / mol) as determined by using gel permeation chromatography in accordance with the protocol included in Colloids and Surfaces A. Physico Chemical & Engineering Aspects, Vol. 162, 2000, p. 107-121.

As used in the present invention, "basis weight" is the weight per unit area of a sample expressed in g / m2 or pounds / 3000 ft2 and is measured according to the base weight test method described in the present description .

"By moisture weight" or "moisture content" means the amount of moisture present in the article of manufacture determined in accordance with the moisture content test method described in the present description immediately after conditioning the article of manufacture in an enclosure conditioned at a temperature of approximately 23 ° C ± 2.2 ° C (73 ° F ± 4 ° F) and a relative humidity of 50% ± 10% for 2 hours.

"Soluble in water", as used in the present description, means a material, such as a polymer, e.g. eg, a dirt absorbing agent, which is miscible in water. In other words, it is a material capable of forming a stable solution (it does not separate for more than 5 minutes after forming a homogeneous solution) and homogeneous with water under ambient conditions.

"Machine direction" or "MD", as used in the present description, means the direction parallel to the flow of the fibrous structure through the machine for manufacturing fibrous structures and / or equipment. of manufacture of sanitary paper products.

"Cross machine direction" or "CD", as used in the present description, means the direction parallel to the width of the fibrous structures manufacturing machine and / or sanitary paper products manufacturing equipment perpendicular to the machine direction.

"Sheet", as used in the present description, means an individual integral fibrous structure.

"Sheets", as used in the present description, means two or more individual integral fibrous structures arranged in a face-to-face relationship, substantially contiguous with another sheet, such that a multi-leaf fibrous structure and / or a fibrous structure is formed. multi-sheet sanitary paper product. In addition, it is contemplated that a single integral fibrous structure can effectively form a multi-leaf fibrous structure, for example, when folded over on itself.

Manufacturing article A non-limiting example of an article of manufacture of the present invention includes a dry article of manufacture, e.g. eg, a dry fibrous structure, such as a dry paper towel, rather than a pre-moistened towel, wipe or protector, containing a liquid composition, exhibiting improved and / or higher average mirror cleaning densitometer values and / or Total densitometer values of improved and / or improved mirror cleaning, measured according to the mirror cleaning test method described in the present description, compared to known articles of manufacture.

In one example, the article of manufacture has a mirror densitometer value 2 greater than the mirror densitometer value 1, measured according to the mirror cleaning test method described in the present description. In another example, article of manufacture has a mirror densitometer value 2 greater than the mirror densitometer value 1, where the difference 7 between the mirror densitometer value 2 and the mirror densitometer value 1 is greater than -0.20 and / or greater than -0.18 and / or greater than -0.15 and / or greater than -0.10 and / or greater than -0.07 and / or / or greater than -0.05, measured according to the mirror cleaning test method described in the present description.

In another example, the article of manufacture has a mirror densitometer value 2 statistically equivalent to the value of mirror densitometer 1.

In another example, the article of manufacture presents the sum of densitometer values of Mirror 1 and Mirror 2 of -0.48 or greater and / or -0.45 or greater and / or -0.41 or greater and / or -0.39 or greater -0.35 or greater and / or -0.29 or greater and / or -0.25 or greater and / or -0.21 or greater and / or -0.10 or greater, measured in accordance with the mirror cleaning test method described in the present disclosure.

In another example, the article of manufacture has an average mirror cleaning densitometer value greater than -0.45 and / or greater than -0.38 and / or greater than -0.30 and / or greater than -0.25 and / or greater than -0.20. and / or greater than -0.15, measured according to the mirror cleaning test method described in the present description.

In one example, the article of manufacture has a mirror densitometer value 2 greater than -0.27 and / or greater than -0.21 and / or greater than -0.17 and / or greater than -0.10 and / or greater than -0.06, measured according to the mirror cleaning test method described in the present description.

In one example, the article of manufacture has a mirror densitometer value 1 greater than -0.30 and / or greater than -0.25 and / or greater than -0.20 and / or greater than -0.15 and / or greater than -0.10 and / or or greater than -0.07, measured according to the mirror cleaning test method described in the present description.

In one example, the article of manufacture comprises two or more soil-absorbing agents. In another example, the article of manufacture comprises a combination (mixture) of two or more soil-absorbing agents. In another example, the two or more soil-absorbing agents are different soil-absorbing agents.

In one example, the article of manufacture comprises a frame. In another example, the article of manufacture comprises a particle.

When the article of manufacture comprises a weft, the weft may comprise a fibrous structure. The fibrous structure can be a dry fibrous structure.

The fibrous structure of the present invention may comprise a plurality of pulp fibers. In addition, the fibrous structure of the present invention may comprise a single-sheet or multi-sheet tissue paper health product, such as a paper towel.

In another example, the article of manufacture of the present invention may comprise a weft, for example, a fibrous structure, in the form of a cleaning pad suitable for use with a cleaning device, such as a device for cleaning floors, for example, a Swiffer® cleaning pad or equivalent cleaning pads.

In yet another example, the article of manufacture of the present invention may comprise a foam structure.

The article of manufacture of the present invention may comprise a dirt absorbing agent. When present, the soil absorbing agent may be present in and / or on the article of manufacture in a concentration greater than 0.005% and / or greater than 0.01% and / or greater than 0.05% and / or greater than 0.1% and / or greater than 0.15% and / or greater than 0.2% and / or less than 5% and / or less than 3% and / or less than 2% and / or less than 1%, by weight article of manufacture In one example, the soil absorbing agent is present in and / or on the article of manufacture at a concentration of about 0.005% to about 1% by weight of the article of manufacture.

In another example of the present invention, an article of manufacture may comprise a dirt absorbing agent at a level greater than 0 pounds / ton (# / ton) and / or greater than 0.1 # / ton and / or greater than 0.5 # / ton and / or greater than 1 # / ton and / or greater than 2 # / ton and / or greater than 3 # / ton and / or to less than 20 # / ton and / or to less than 15 # / ton and / or up to less than 10 # / ton and / or up to less than 6 # / ton and / or up to 5 # / ton or less and / or up to 4 # / ton or less in weight of an article of manufacture. The level of soil absorbing agent present in and / or on an article of manufacture, as used in the present description, in accordance with the present invention is in terms of the active solids base of the soil absorbing agent.

The article of manufacture may comprise other ingredients in addition to the soil absorbing agent, for example, a surfactant. The surfactant may be present in the article of manufacture in a concentration from about 0.01% to about 0.5% by weight of the article of manufacture. Non-limiting examples of a suitable surfactant include C 8-16 alkyl polyglycoside, cocoamido propyl sulfobetaine or mixtures thereof.

In one example, the article of manufacture comprises a signal, such as a pigment and / or dye, which becomes visible or invisible to the view of a consumer when the article of manufacture adsorbs dirt and / or when a soil absorbing agent present in and / or on the article of manufacture adsorbs dirt. In another example, the signal can be a difference in the texture of the article of manufacture or a difference in the physical state of the article of manufacture, for example, the article of manufacture dissolves and / or evaporates when it adsorbs dirt.

In another example, the soil absorbing agent may be present in and / or on the article of manufacture in a pattern, such as a non-random repeating pattern composed of lines and / or letters / words, and / or present in y / or on regions of different density, different basis weight, different elevation and / or different texture of the article of manufacture. In one example, the soil absorbing agent present in an article of manufacture can provide a visual signal as a result of a higher concentration of dirt adsorbed by the soil absorbing agent.

In still another example of the present invention, the article of manufacture can provide a residual cleaning effect, measured according to the mirror cleaning test method described in the present description, on a surface, such as a mirror, after adsorbing at least a portion of the dirt previously present on the surface. Without being limited by theory, it is believed that this residual cleaning effect, which at least partially inhibits the at least some spots from accumulating and / or remaining on the surface, results from at least a portion of the soil absorbing agent deposited on the surface. the surface and remains on it after cleaning with the article of manufacture.

Table 1 below shows the individual mirror densitometer es ("Density") and the average mirror densitometer ("Density") es of the articles of manufacture, in this case, dry fibrous structures (e.g. paper towels), such as a fibrous structure in accordance with the present invention, and of known articles of manufacture, such as dry fibrous structures (eg, paper towels), measured in accordance with the test method of mirror cleaning described in the present description. Statistical analysis software, p. ex. the JMP statistical analysis programs, to compare the densitometer es of mirrors by mirror # for each of the articles of manufacture. In Table 1, the letters A, B, C and D were included together with the mean densitometer es of mirrors for each article of manufacture and each mirror within that article of manufacture. The mirrors connected by the same letter are not significantly different at 95% confidence interthrough the use of Student's t-tests.

Table 1 * NOTE: The addition of Hyperfloc to the articles of manufacture applies equally to both sheets of a double sheet product except where indicated, eg. eg, 1 # / ton on the total sheet applied on the engraved side, represented as 2/0/1, which means 2 # / ton applied to the engraved sheet and 0 # / ton applied to the side that is not engraved and results in a sheet with 1 # / ton in total. The calculation of # / ton for the individual sheets uses the basis weight of the individual sheets, as opposed to the use of the total basis weight of multiple sheets.

In one example of the present invention, the soil absorbing agent present in the article of manufacture has an organic volatile content (VOC) of less than 20% and / or less than 15% and / or less than 10% and / or less than 5%, measured according to the VOC test method described in the present description. In yet another example of the present invention, an article of manufacture comprises a first dirt absorbing agent having a volatile organic carbon (VOC) content greater than 20% and a second soil absorbing agent having a volatile organic carbon content. (VOC) less than 20% and / or less than 15% and / or less than 10% and / or less than 5%, measured in accordance with the VOC test method described in the present disclosure.

In another example of the present invention, the dirt absorbing agent in the article of manufacture has a total volatile content of less than 55% and / or less than 50% and / or less than 45% and / or less than 40% and / or less than 40% and / or less than 35% and / or less than 25% and / or less than 15%, measured in accordance with the VOC test method described in the present disclosure.

In another example of the present invention, the dirt absorbing agent present in the article of manufacture has a moisture content of less than 30% and / or less than 25% and / or less than 20% and / or less than 15%, measured according to the VOC test method described in the present description.

Table 2 below illustrates the total volatile content, the moisture content and the volatile organic carbon content (measured according to the VOC test method described in the present description) of the examples of soil-absorbing agents, in this case, non-ionic polyacrylamides; among them, Hyperfloc® NE823E, Hyperfloc® NE823F and Hyperfloc® ND823 (commercially available from SNF Floerger and / or Hychem, Inc.) alone or in combination with each other, prepared from commercially available materials.

Table 2 Dirt-absorbing agents The soil absorbing agent of the present invention may be any suitable chemical substance, such as a polymer, which, when applied and / or present in an article of manufacture of the present invention, provides the article of manufacture with a densitometer value improved mirror cleaning in relation to an article of manufacture that does not contain such a chemical substance, measured according to the mirror cleaning test method described in the present description.

In one example, the soil absorbing agent exhibits a weight average molecular weight greater than 750,000 and / or greater than 1,500,000 and / or greater than 4,000,000 and / or approximately 40,000,000 and / or approximately 20,000,000 and / or or approximately 10,000,000.

In another example, the soil absorbing agent exhibits a number average molecular weight of greater than 200,000 g / mol and / or greater than 500,000 g / mol and / or greater than 750,000 g / mol and / or greater than 900,000 g / mol to one. less than 2,000,000 g / mol and / or less than 1,750,000 g / mol and / or less than 1,500,000 g / mol. In one example, the soil absorbing agent exhibits a number average molecular weight of from about 500,000 g / mol to about 2,000,000 g / mol and / or from about 900,000 g / mol to about 1,700,000 g / mol.

In one example, the soil absorbing agent of the present invention has an average particle size distribution of less than 5000 d.nm and / or less than 3000 d.nm and / or less than 2000 d.nm and / or greater than 10 d.nm and / or greater than 100 d.nm and / or greater than 500 d.nm and / or greater than 1000 d.nm.

Non-limiting examples of suitable chemical compounds include polymers. In one example, the soil absorbing agent comprises a polymer which, in turn, it comprises monomeric units derived from acrylic acid and / or amine compounds and / or quaternary ammonium compounds and / or acrylamide. In another example, the soil absorbing agent comprises a polymer which, in turn, comprises monomer units derived from acrylic acid and / or quaternary ammonium compounds and / or acrylamide. In one example, polyethyleneimines, such as Lupasol®, commercially distributed by BASF Corporation, are not suitable as soil-absorbing agents in the present invention.

In one example, the soil absorbing agent comprises a flocculating agent as compared to a coagulating agent.

A flocculating agent is a chemical compound that causes colloids and other particles in suspension, especially in liquids, to clump together. An example of a flocculating agent according to the present invention is Mirapol® from Rhodia and Hyperfloc® from Hychem / SNF.

A coagulating agent, on the other hand, for purposes of the present invention, is a chemical compound that causes a liquid to change to a thickened solid. An example of a coagulating agent according to the present invention is Lupasol® from BASF Corporation.

In one example, the soil absorbing agent comprises a polyacrylamide homopolymer, such as Hyperfloc®, commercially available from Hychem, Inc.

In one example, the soil absorbing agent can be used as a highly concentrated reverse emulsion (eg, a water-in-oil emulsion) containing an amount greater than 10% and / or greater than 15% and / or greater than 20% and / or greater than 25% and / or greater than 30% and / or greater than 35% and / or approximately 60% and / or approximately 55% and / or approximately 50% and / or approximately 45% of assets. The oil phase may consist of high quality mineral oil with a boiling point in the range of 242-276 ° C (468-529 ° F) or a heavy mineral oil with a boiling point in the range of 320-520 ° C (608-968 ° F). In another example, the soil absorbing agents can be used as a highly concentrated dehydrated emulsion, for example, essentially dry particles in suspension in a continuous oil phase, containing an amount greater than 10% and / or greater than 15% and / or greater than 20% and / or greater than 25% and / or greater than 30% and / or greater than 35% and / or approximately 60% and / or approximately 55% and / or approximately 50% and / or approximately 45% active. The oil phase may consist of high quality mineral oil with a boiling point in the range of 242-276 ° C (468-529 ° F) or a heavy mineral oil with a boiling point in the range of 320-520 ° C (608-968 ° F). In one example, the oil phase of the dehydrated emulsion comprises a hydrocarbon fluid, such as white mineral oil, having a VOC content of less than 60%, measured according to the VOC test method, an emulsifying surfactant and / or inverting surfactant. Additionally, the dirt absorbing agent of the dehydrated emulsion may have a net charge density of more than -5 meq / g less than 5 meq / g and / or more than -5 to about -0.1 meq / g, measured in accordance with the load density test method described in the present description. In yet another example, the dirt absorbing agent may have a UL viscosity of about 1 to about 6 cP, measured in accordance with the UL viscosity test method described in the present disclosure.

In one example, the soil absorbing agent can be used as a highly concentrated inverse emulsion wherein the continuous phase of the reverse emulsion comprises mineral oil, such as white mineral oil.

In yet another example, the soil absorbing agent can be used as a dehydrated inverse emulsion, such as Hyperfloc® ND823, AD589 and CD864, which are commercially available from SNF Floerger and / or Hychem, Inc., which consist of micrometer sized particles of highly coiled polymer in a continuous oil phase.

The inverse emulsions of the present invention can be applied directly to a surface of an article of manufacture, such as a surface of a dry fibrous structure, a surface of a wet fibrous structure and / or to be added at the wet end of a manufacturing process of paper.

In one example, the soil absorbing agent comprises a combination of two or more soil-absorbing agents. In one example, the soil absorbing agent comprises a combination of a water-in-oil polyacrylamide emulsion (such as Hyperfloc® NE823F) and a dehydrated reverse emulsion of polyacrylamide (such as Hyperfloc® ND823). In one example, the combination comprises 50% by volume or more and / or 60% or more by volume and / or 75% or more by volume and / or 80% by volume or more.

In one example, the soil absorbing agent of the present invention is water soluble.

Typically, the addition of aqueous solutions to the dry tissue is a challenge due to the limitations in the amount of water that can be applied to the dry sheet without significantly degrading its structure and the high viscosity of the solutions with the highest solids content (more that approximately 2% of active). High viscosity solutions are more prone to bonding of the polymers and, consequently, individual sheets of a roll are attached; which can tear as the individual sheets are removed from the roll. Additionally, a slow penetration of the polymer in the sheet aggravates the accumulation of polymer in the rolls and other surfaces exposed to the sheet in the conversion process. The use of water-in-oil emulsions, such as Hyperfloc NE823F, overcomes the process problems associated with the addition of aqueous solutions of high viscosity; however, water-in-oil emulsions have a high content of volatile organic compounds that significantly increase VOCs and require permits and / or additional implementation of the best available control technology. The use of dehydrated emulsions, such as Hyperfloc ND823, drastically decreases the VOC content. However, it was observed that the dehydrated polyacrylamide emulsions have a lower mirror cleaning performance than the water-in-oil emulsion equivalent Hyperfloc NE823F. This deficiency is more evident when the first mirror is cleaned, and, in fact, most data show that the cleaning performance improves in the second and, in some cases, in the third mirror, in relation to the first mirror. This initial phase shift in performance could minimize the favorable consumer response observed with the Hyperfloc NE823F.

In light of the above, it is clear that it is necessary to obtain an emulsion with a low VOC content that improves the initial cleaning performance, e.g. eg, the cleaning of the first mirror, in relation to Hyperfloc ND823. In this regard, it was surprisingly found that the combinations of Hyperfloc NE823F / ND823 formed stable emulsions and that the presence of a small percentage of oil-in-water emulsion improved the initial cleaning performance.

Processes to prepare a manufacturing article The article of manufacture of the present invention can be manufactured by any suitable process known in the art. For example, if the article of manufacture is a plot, any suitable process for manufacturing can be used of frames.

In one example, the article of manufacture comprises a fibrous structure. The fibrous structure can be prepared with a process comprising the step of contacting a surface of the fibrous structure with a soil absorbing agent according to the present invention. Surprisingly, it has been discovered that the direct application of a high water active emulsion in oil to a dry leaf can be carried out without significantly altering the structure of the sheet and enabling the improvement of the VFS absorbent capacity in a very efficient way. similar to that of superabsorbent polymers without the negative consumption response associated with the release of visible superabsorbent gel particles that contaminate the surface being cleaned or the consumer's hands.

In another example, a process for manufacturing an article of manufacture, such as a fibrous structure, comprises the steps of: to. provide a pulp of fibers; b. deposit the pulp of fibers on a porous metal mesh to form an embryonic web; c. drying the embryonic web to produce a fibrous structure; and d. contacting the fibrous structure with a soil absorbing agent to produce an article of manufacture (a fibrous structure, eg, a dry fibrous structure) in accordance with the present invention.

In yet another example, a process for manufacturing an article of manufacture, such as a fibrous structure, comprises the steps of: to. providing a fiber pulp comprising a dirt absorbing agent; b. deposit the pulp of fibers on a porous metal mesh to form an embryonic web; Y c. drying the embryonic web to produce an article of manufacture (a fibrous structure, eg, a dry fibrous structure) in accordance with the present invention; Y d. optionally, contacting the article of manufacture with a dirt absorbing agent.

The fiber pulp can comprise temporary and / or permanent wet strength agents, such as Kymene® (permanent wet strength) and Hercobond® (temporary wet strength), both available from Ashland Inc.

In yet another example of a process for manufacturing a fibrous structure stretched to air, the process comprises the steps of: to. provide pulp fibers; b. making a fibrous structure stretched to the air from the pulp fibers; Y c. contacting a surface of the fibrous structure lying in the air with a dirt absorbing agent in accordance with the present invention.

In one example, the soil absorbing agent can be added to a fibrous structure of the present invention during papermaking between the Yankee dryer and the coil and / or during the conversion to apply it to one or more surfaces of the fibrous structure. In one example, a single sheet paper towel comprises the dirt absorbing agent on a surface of the paper towel. In another example, a single sheet paper towel comprises the dirt absorbing agent on both surfaces of the paper towel. In yet another example, a two-sheet paper towel it comprises the dirt absorbing agent on one or both outer surfaces of the two-ply paper towel. In yet another example, a two-ply paper towel comprises the dirt-absorbing agent on one or more internal surfaces of the two-ply paper towel. In yet another example, a two-ply paper towel comprises the dirt-absorbing agent on one or more external surfaces and one or more internal surfaces of the two-ply paper towel. A person of ordinary experience will understand that the external surfaces and various internal surfaces of a paper towel of three or more sheets could comprise the dirt absorbing agent.

In yet another example, an emulsion, a reverse emulsion, of the dirt absorbing agent can be added to the pulp of fibers in the addition of the wet end of a papermaking process by adding the pure reverse emulsion as received or after invert the emulsion and form a dilute aqueous solution of 0.1-0.2% active solids of the dirt absorbing agent at the entrance of a main pump of a paper machine.

In one example, the article of manufacture can be prepared by adding a soil absorbing agent at the wet end of a papermaking process by wet laying. In other words, the dirt absorbing agent can be added to a fiber pulp comprising hardwood fibers and / or softwood fibers before depositing the pulp on a porous forming wire.

In another example, the article of manufacture of the present invention can be prepared by printing a soil absorbing agent onto a surface of a manufacturing article, such as a fibrous structure, for example, in a conversion operation. The printing operation can be done with any suitable printing equipment, for example, by way of a rotogravure roller.

In yet another example, an article of manufacture of the present invention is it can be manufactured by extruding a dirt absorbing agent onto a surface of an article of manufacture, such as a fibrous structure.

In yet another example, an article of manufacture of the present invention can be made by spraying a soil absorbing agent onto a surface of a manufacturing article, such as a fibrous structure.

In yet another example, an article of manufacture of the present invention can be made by spraying a soil absorbing agent onto a wet fibrous structure during the papermaking process after the vacuum dewatering stage, but before the pre-dryers and / or after the presecadores, but before the Yankee.

In one example, one or more soil-absorbing agents can be added to a fibrous structure at the wet end, in the fibers prior to inclusion in a fiber pulp and / or during the papermaking process and / or during the conversion of the fibrous structure and / or to a finished fibrous structure, such as a paper towel. For example, a first soil absorbing agent can be added to a fibrous structure at the wet end, and a second soil absorbing agent, same or different from the first, can be added to the fibrous structure during the papermaking process and / or the conversion.

A soil absorbing agent comprising Hyperfloc® NE823F represents a water-in-oil emulsion, free of APE (approximately 30% active - approximately 30% polyacrylamide, 30% water, 30% high boiling oil and 10% of surfactants), available from Hychem, Inc., under the trade name NE823F. A soil absorbing agent comprising Hyperfloc® ND823 represents a dehydrated emulsion consisting of (approximately 50% active - approximately 50% polyacrylamide, 40% 4 high boiling oil and 10% surfactants). A combination (mixture) of Hyperfloc® NE823F and ND823, p. eg, by low shear mixing, it produces a stable emulsion, with no apparent sedimentation. It was found that formulations within the range of 100% NE823F to 100% ND823 were stable with low shear mixing of a brief minimum duration, as is typically recommended for water-in-oil emulsion products. A 50/50 volume combination is prepared. Other combinations may be used, such as 25/75 and / or 75/25 by volume of NE823F and ND823. The emulsion of the combination of Hyperfloc® 50/50 by volume, of NE823F / ND823 is applied directly on an engraved surface of a fibrous structure by means of a conversion extruder, using an S-winder configuration, such that the extruder is located under the sheet that is completely wrapped over the extruder head. Alternatively, double-sided extrusion can be used.

In yet another example, an article of manufacture of the present invention can be manufactured by depositing a plurality of fibers mixed with a soil absorbing agent in a process of coformming and / or laying in the air.

In yet another example, a manufacturing article containing soil-absorbing agents can be manufactured by including the soil-absorbing agents at acceptable locations within the processes of spunbonding, melt-blowing, carding and / or hydroentanglement.

The soil absorbing agent can be applied and / or included in an article of manufacture in a pattern, such as a non-random repeat pattern.

Non-restrictive examples Example 1 The articles of manufacture, particularly fibrous structures, ie paper towels, are produced by using a pulp of cellulose consisting of Kraft pulp of softwoods from the north (NSK) and hardwoods of eucalyptus (EUC) in a proportion of approximately 65/35. The NSK paste is refined as necessary to keep the target wet burst in the coil. Any pulp preparation and refining methodology common in the papermaking industry can be used.

An active 3% solution of Kymene 1142 is added to the refined NSK line before the static in-line mixer, and an active 1% solution of Wickit 1285, an ethoxylated fatty alcohol defoamer available from Ashland Inc., is added. the EUC pulp. Addition levels are 9.1 and 0.45 kg (20 and 1 pounds) of active paper, respectively.

The thick raw materials of NSK and EUC are combined into a single line of thick raw material, followed by the addition of an active 1% solution of carboxymethylcellulose (CMC) to 3.2 kg (7 pounds) of active / ton paper towel , and a softening agent may optionally be added.

Then, the thick raw material is diluted with white water at the inlet of a main pump to a consistency of approximately 0.15% based on the total weight of NSK and EUC fibers. The diluted slurry is directed to an inlet box with a configuration without layers, such that the wet web produced from the slurry is formed on a Fourdrinier wire (foraminous wire).

The dewatering occurs through the Fourdrinier wire, with the help of a diverter and vacuum boxes. The Fourdrinier mesh has a satin sheath configuration with 5 and 84 monofilaments in the machine direction and 78 monofilaments in the direction transverse to the machine by 2.54 cm (inch), respectively. The Fourdrinier mesh speed is approximately 43 3. m / s (675 ppm (feet per minute)).

The wet embryonic web is transferred from the Fourdrinier wire with a fiber consistency of about 22% at the point of transfer, to a web that carries air-drying resin through the patterned web. In order to provide the fibrous structure products of the present invention, the speed of the pattern fabric by passing air drying is approximately 18% slower than the Fourdrinier wire speed (eg, a wet molding process). . In another example, the wet embryonic web can be transferred to a patterned web and / or fabric, wherein the speed of the patterned web by passing air drying is approximately equal to the speed of the Fourdrinier wire.

Additional dewatering is achieved by vacuum assisted with drainage until the continuous material has a fiber consistency of approximately 26-28%.

While in contact with the patterned drying cloth, the weft is pre-dried by means of through-air presechers until a fiber consistency of approximately 65% by weight is obtained.

After the pre-dryers, the semi-dry web is transferred to a Yankee dryer and adhered to the surface of the Yankee dryer by the spraying of a creping adhesive. The creping adhesive is an aqueous dispersion with active ingredients consisting of approximately 2 # / ton of polyvinyl alcohol and 0.5 # / ton of release agent (CREPETROL® R6390). In addition, creping aids, such as CREPETROL® A3025, can be used. CREPETROL® A3025 and CREPETROL® R6390 are commercially available from Ashland Inc. (formerly Hercules Inc.). The index of supply of the folding adhesive to the surface of the Yankee dryer is of approximately 0.15% of solid adhesives based on the dry weight of the weft. The consistency of the fiber is increased to approximately 97% before dry creping of the weft from the Yankee dryer with the use of a doctor blade.

The scraper blade has a chamfered edge of approximately 45 ° and is positioned in relation to the Yankee dryer to provide an impact angle of approximately 101 °. The Yankee dryer is used at a temperature of about 177 ° C and at a speed of about 2.79 m / s (550 feet per minute). The fibrous structure is wound on a roll with the use of a surface-driven reel drum having a surface velocity of about 3.09 m / s (610 ppm). In another example, the scraper blade may have a beveled angle of about 25 ° and be placed in relation to the Yankee dryer to provide an impact angle of about 81 °; the coil can be operated at a speed approximately 10% slower than the speed of the Yankee dryer.

A first soil-absorbing agent comprising a Hyperfloc® dehydrated emulsion of micrometer-sized polymeric particles dispersed in oil is applied (approximately 50% active - approximately 50% polyacrylamide, 40% high boiling oil and 10% surfactants), available from Hychem, Inc., under the tradename ND823, directly on the surface of a fibrous structure during the conversion operation by an extruder, on the engraved side of a two-sheet product. Additionally, a second extruder can be used to apply a polymer that attracts dirt onto the side of the untrimmed sheet.

A second soil-absorbing agent comprising a Hyperfloc® water-in-oil emulsion (approximately 30% active - approximately 30% polyacrylamide, 30% water, 30% high boiling oil and 10% surfactants) is applied with the active polymer, which consists of highly polymer rolled, dissolved in water droplets of micrometric size, available from Hychem, Inc., under the trade name NE823F, which is the non-dehydrated form of Hyperfloc® ND823, directly on the surface of a fibrous structure by spray application in manufacturing of the paper, on the side of the fabric and / or the wire side of the dry fibrous structure between the calender and the coil. Alternatively, an extruder application can be used in the conversion.

The fibrous structure can be etched before and / or after the application of one or both of the soil-absorbing agents. It can then be converted into a double-sheet paper towel product, which has a basis weight of approximately 45.6-53.7 g / m2 (28-33 lbs / 3000 ft2) with the side of the fabric and / or the wire side towards outside.

Example 2 The articles of manufacture, particularly fibrous structures, ie paper towels, are produced by using a pulp of cellulose consisting of a kraft pulp of softwoods from the north (NSK) and hardwoods of eucalyptus (EUC) in a proportion of approximately 70/30. The NSK paste is refined as necessary to keep the target wet burst in the coil. Any pulp preparation and refining methodology common in the papermaking industry can be used.

An active 3% solution of Kymene 1142 is added to the refined NSK line before an in-line static mixer, and an active 1% solution of Wickit 1285, an ethoxylated fatty alcohol defoamer available from Ashland Inc., is added, to the EUC pulp. Addition levels are 20 and 1 pounds of active / tonne of paper, respectively.

The dewatering occurs through the Fourdrinier wire, with the help of a diverter and vacuum boxes. The Fourdrinier mesh has a shallow sheath configuration with a shed of 5, as well as 84 monofilaments in the machine direction and 78 monofilaments in the transverse direction to the machine by 2.54 cm (inch), respectively. The Fourdrinier mesh speed is approximately 43 3 m / s (675 ppm (feet per minute)).

The wet embryonic web is transferred from the Fourdrinier wire with a fiber consistency of approximately 22% at the point of transfer, to a web that transports air-drying resin from the patterned web. In order to provide the fibrous structure products of the present invention, the speed of the pattern fabric by passing air drying is approximately 18% slower than the Fourdrinier wire speed (eg, a wet molding process). . In another example, the wet embryonic web can be transferred to a patterned web and / or fabric, wherein the speed of the patterned web by passing air drying is approximately equal to the speed of the Fourdrinier wire.

Additional drainage is achieved by vacuum assisted with drainage until the Continuous material has a fiber consistency of approximately 26-28%.

After the pre-dryers, the semi-dry web is transferred to a Yankee dryer and adhered to the surface of the Yankee dryer by the spraying of a creping adhesive. The creping adhesive is an aqueous dispersion with active ingredients consisting of approximately 2 # / ton of polyvinyl alcohol and 0.5 # / ton of release agent (CREPETROL® R6390). In addition, creping aids, such as CREPETROL® A3025, can be used. CREPETROL® A3025 and CREPETROL® R6390 are commercially available from Ashland Inc. (formerly Hercules Inc.). The index of supply of the folding adhesive to the surface of the Yankee dryer is about 0.15% of solid adhesives based on the dry weight of the weft. The consistency of the fiber is increased to approximately 97% before dry creping of the weft from the Yankee dryer with the use of a doctor blade.

The scraper blade has a chamfered edge of approximately 45 ° and is positioned in relation to the Yankee dryer to provide an impact angle of approximately 101 °. The Yankee dryer is used at a temperature of about 177 ° C and at a speed of about 2.79 m / s (550 feet per minute). The fibrous structure is wound on a roll with the use of a surface-driven reel drum having a surface velocity of about 3.09 m / s (610 ppm). In another example, the scraper blade can have a beveled angle of about 25 ° and is placed in relation to the Yankee dryer to provide an impact angle of about 8G; the coil can be operated at a speed approximately 10% slower than the speed of the Yankee dryer.

A soil absorbing agent comprising Hyperfloc® NE823F represents a water-in-oil emulsion, free of APE (approximately 30% active - approximately 30% polyacrylamide, 30% water, 30% high boiling oil and 10% of surfactants), available from Hychem, Inc., under the trade name NE823F. A soil absorbing agent comprising Hyperfloc® ND823 represents a dehydrated emulsion consisting of (about 50% active -about 50% polyacrylamide, 40% high boiling oil and 10% surfactants). A combination (mixture) of Hyperfloc® NE823F and ND823, p. eg, by low shear mixing, produces a stable emulsion, without apparent sedimentation. It was found that formulations within the range of 100% NE823F to 100% ND823 were stable. A 50/50 volume combination is prepared. The emulsion of the Hyperfloc® 50/50 by volume combination of NE823F / ND823 is applied directly onto a surface etched with a fibrous structure by a conversion extruder, using an S-winder configuration, such that the extruder is located under the sheet, with a total envelope on the extruder head. Alternatively, double-sided extrusion can be used.

The fibrous structure can be converted into an engraved double-sheet paper towel product, having a basis weight of approximately 45.6-53.7 g / m2 (28-33 lbs / 3000 ft2) with the side of the fabric and / or the side of the wire outwards.

Test methods Unless otherwise specified, all tests described in the present description, including those described in the Definitions section and the following test methods, are carried out with samples that were conditioned in an air-conditioned room. temperature of 23 ° C ± 1.0 ° C and a Relative humidity of 50% ± 2% for a minimum of 2 hours before the test. All plastic or cardboard packaging of the article of manufacture must be carefully removed from the paper samples before the test. The samples tested are "usable units". "Usable units", as used in the present description, means sheets, flat surfaces of the raw material roll, preconverted flat surfaces and / or single-leaf or multi-leaf products. Unless otherwise specified, all tests are carried out in a conditioned room and in the same environmental conditions in the aforementioned conditioned room. Discard all damaged product. Samples that have defects such as wrinkles, tears, holes and the like are not tested. Conditioned samples as described in the present description are considered dry samples (such as "dry filaments") for testing purposes. All instruments are calibrated according to the manufacturer's specifications.

Basis weight test method The basis weight of a fibrous structure is measured in stacks of twelve usable units with the use of an upper load analytical balance with a resolution of ± 0.001 g. The balance is protected from drafts and other disturbances with the use of a surge protector. A precision cut matrix measuring 8.89 cm ± 0.0089 cm by 8.89 cm ± 0.0089 cm (3.500 inches ± 0.0035 inches by 3.500 inches ± 0.0035 inches) is used to prepare all samples.

With a precision cut matrix, the samples are cut into squares. The cut squares combine to form a stack with a thickness of twelve samples. The mass of the sample pile is measured and the result is recorded up to the nearest 0.001 g.

The basis weight is calculated in g / m2 or pounds / 3000 ft2 of the following way: Base weight = (mass of the stack) / [(area of 1 square in the stack) x (number of squares in the stack)] For example Base weight (pounds / 3000 ft2) = [[pile mass (g) / 453.6 (g / pounds)] / [12.25 (inches2) / 144 (inches2 / ft2) x 12]] x 3000 or Base weight (g / m2) = pile mass (g) / [79,032 (cm2) / 10,000 (cm2 / m2) x 12] The result is reported with an accuracy of 0.1 g / m2 or 0.1 pounds / 3000 ft2. The dimensions of the samples can be modified or varied by using a similar precision cutter as mentioned above, so that there is at least 645.2 cm2 (100 square inches) of sample area in the stack.

Moisture content test method The moisture content present in an article of manufacture, such as a fibrous structure, is measured by using the following moisture content test method. An article of manufacture or part of it ("sample") is placed in a conditioned room at a temperature of 23 ° C ± 1.0 ° C and a relative humidity of 50% + 2% for at least 24 hours before the test. Each sample of The fibrous structure has an area of at least 25.8 cm2 (4 square inches), but a size small enough to fit properly into the balance weighing pan. In the temperature and humidity conditions mentioned above, with the use of a balance with at least four decimal places, the weight of the sample is recorded every five minutes until a change of less than 0.5% with respect to the previous weight is detected during a 10 minute period. The final weight is recorded as the "balance weight". Within 10 minutes, the sample is placed in a forced air oven on the top of foil for 24 hours at 70 ° C ± 2 ° C at a relative humidity of 4% ± 2% for drying. After 24 hours of drying, the sample is removed and weighed within 15 seconds. This weight is designated as the "dry weight" of the sample.

The moisture content of the sample is calculated as follows: % moisture in the sample = 100% x (weight of sample balance - dry weight of the sample) Dry weight of the sample The moisture% of the sample is averaged for 3 replicates to give the% moisture reported in the sample. The results are reported with an accuracy of 0.1%.

Mirror cleaning test method For the mirror cleaning test, a test support car is used that holds 4 individual 71.1 x 71.1 cm (28"x 28") mirrors (one on each of the four sides) that rest on a flat surface , such as a floor. The silver layer of the mirror is on the back surface of a flat transparent glass sheet approximately 5 mm thick. The carriage is configured so that the lower edge of each mirror is approximately 1.05 m (3 '6") from the flat surface.

The mirror is prepared for the cleaning test as follows: 1) The Windex® product, commercially available from SC Johnson (a composition containing 0.1-1.0% by weight of ethylene glycol monohexyl ether, 1.0-5.0% by weight of isopropanol and 90-100% by weight of water), or equivalent, is sprayed (4 full sprays, approximately 3.5 g of solution) onto the surface of the mirror and then distributed over the entire surface of the mirror with two sheets of a towel single-sheet paper, for example, 2010 commercially available as Bounty® Basic (folded into quarters) with a circular rubbing motion; 2) Afterwards, the surface of the mirror is dried by rubbing and lightly polished with the practically dry side of the single folded sheet paper towel; 3) the surface of the mirror is rubbed with two more sheets of the single-sheet paper towel saturated with deionized water; and 4) a colander is used with a top-down movement to remove all excess deionized water. Steps 3) & 4) can be repeated as necessary to achieve a mirror surface free of streaks and stains without any residual impact on the cleaning performance of subsequent test manufacturing articles. Any suitable absorbent substrate can be used in place of Bounty Basic that is not impregnated with polymers that can be deposited on the glass surface, which can affect the ease or difficulty of cleaning with subsequent test fabrication articles.

A model soil slurry is prepared by suspending 1% by weight of Black Todd Clay black clay in a 50/50 weight ratio of a water / isopropyl alcohol mixture containing 0.05% by weight of 100% soybean oil ( viscosity from 150 cP to 200 cP).

The preparation of 100% cooked soybean oil is as follows. Approximately 200 grams of 100% soybean oil is available from Spectrum Chemical Manufacturing Corp., 14422 S. San Pedro St., Gardena, CA 90248, in a 1000 ml beaker with stir bar. The glass with the soybean oil is placed on a hot plate and heated to 204 ° C while stirring slowly. Air is added through a set of glass pipette tips to continuously bubble through the oil. The oil is cooked continuously until it has a viscosity, at 25 ° C ± 2.2 ° C, from 150 to 200 cP. The color changes to a dark orange color. Viscosity is measured with a Cannon-Ubbelohde viscometer tube no. 350, available from Cannon Instrument Company, State College, PA 16803, or equivalent viscometer. A sample of oil that is almost at room temperature is added to the viscometer and equilibrated at 25 ° C in a constant temperature water bath. The efflux time for the meniscus to pass from the upper mark to the lower mark is measured within ± 0.01 second while the oil is allowed to flow through the viscometer tube by gravity. The kinematic viscosity in mm2 / s is calculated by multiplying the time in seconds by the calibration constant supplied with the viscometer tube. The density of the fluid is determined separately when measuring the weight of a fixed volume of oil with a volumetric flask of 25 ml and an analytical balance of 4 decimals. The viscosity in cP can be calculated by multiplying the kinematic viscosity by the oil density in g / ml. The cooking time will vary depending on the amount, surface area and air flow through the oil.

The following procedure is used to apply the model dirt to surfaces of clean mirrors. The target amount of model sprayed dirt is 44 g +/- 2.5 g. A spray bottle, no. Part 0245-01, available from www.SKS-bottle.com or equivalent spray bottle to spray the model dirt suspension on the surface of the mirror. The spray bottle is filled with the dirt suspension model, weighs to an accuracy of 0.01 g and is recorded as the initial weight. Then, the spray bottle is manually pressurized as necessary to achieve a dispersed spray of fine droplets. Additional pressurization is required between each mirror. The spray bottle is held approximately 0.46 m (1.5 ft.) From the surface of the mirror, and a nearly horizontal sweeping motion is used that starts at the top of the mirror surface and continues down to the bottom of the surface of the mirror to cross this surface 8 times in total while trying to obtain a relatively uniform coverage on it. After applying the model dirt suspension to the 4 mirrors, the spray bottle and its remaining contents are weighted to an accuracy of 0.01 g and this weight is recorded as weight after the first spray. The mirrors are dried sequentially with a manual hair dryer. The difference between the initial weight and the weight after the first spray is used to adjust the amount of spray applied in a second application to achieve the target amount of 44 g +/- 2.5 g. The second application of the model dirt suspension is applied to each mirror surface in a circular motion, starting from the outside (approximately 8-10 inches from the side edges) inward toward the center. After drying the second application of the model soil suspension, the mirrors are ready to be cleaned with a test article of manufacture. If the time between the application of dirt and the cleaning of the mirrors with a test sample extends more than 30 minutes, the mirrors must return to their original condition by using the previously defined procedure after which the application procedure can be repeated. dirt.

A sample of an article of test manufacture, for example, a paper towel, is prepared in the following manner. Two sheets of the article of manufacture, for example, a paper towel, can be delineated and connected with adjacent sheets by lines punching or cutting, or the sheets of the sample may be individual sheets, such as in the form of cloths, napkins and / or individual tissues. If the article of manufacture, for example, a paper towel, has a size format selected, then 4 sheets are used. The dimensions of each sheet, or in the case of two sheets of selected size, vary by mark of approximately 21.59 x 27.94 cm (8.5"x 11") to 35.6 x 27.9 cm (14"x 11") and from 2.20 to 5.2 g. The sample of 2 sheets or 4 in the case of a selected size is folded in half, as shown in Figure 1 (along the perforations, if present) with the engraved side facing out (when appropriate) . As shown in Figure 1, then, the folded sample is again folded in half with the fold perpendicular to the MD direction and then folded back in half perpendicular to the CD direction so that a sample pad forms of leaf with a quarter of the size that has 8 sheets of thickness, and each sheet can consist of 1, 2 or more individual leaves. In the case of articles of manufacture that have the polymer that attracts dirt applied on one side, it is important to fold the sheet, so that the side that contains the polymer that attracts dirt comes in contact with the surface of the mirror . Next, the surface of the mirror is treated with 5 complete Windex sprays: two on top; one in the center and two in the lower area of the mirror. The weight of the Windex spray by mirror is approximately 4.35 g ± 0.36 g. The surface of the mirror is cleaned by taking the sample pad by hand, holding the substrate between the thumb and forefinger and rubbing with firm pressure in a transverse direction while holding the sheet (side 1) as flat as possible the surface of the mirror avoiding touching the mirror with any part of the hand when using 8 passes from side to side so as to come in contact with the entire surface of the mirror. Then, the sample pad is turned over, and the relatively dry back side (side 2) is used to rub the surface of the mirror with an upward and downward movement with firm pressure applied to the surface. pass to ensure contact with the entire surface of the mirror and hold, again, the sample pad as flat as possible against the surface of the mirror. Then, the sample pad is deployed once and then folded back on itself and expose relatively new sample pad surfaces to clean the second mirror after the Windex application, as described above; side 3 (opposite to side 1) is used for rubbing from side to side and then turned to side 4 (opposite side 2) for rubbing up and down. Then, the pad is deployed twice to expose a new surface of the sample. The sample is then folded in half so that the new surface of the sample is visible with the two areas of the first configuration of the sample pad (sides 1 and 3) facing each other and then doubled again to clean the surface of the third mirror after the Windex application, as described above. Side 5, opposite to sides 1 and 3, is used first and then turned to side 6 for the second rubbed up and down. The sample pad is deployed once and then folded back on itself to expose sides 7 and 8 to clean the surface of the fourth mirror after the Windex application, as described above. The side 7 opposite the sides 5, 3 & 1 is used for rubbing from side to side and then turned to side 8 for final rubbing up and down. In each case, the wettest part of the folded sample pad is used for rubbing from side to side, and the drier side for final rubbing up and down.

The surfaces of the four mirrors should be cleaned sequentially so that the minimum drying of the sample pad occurs. After cleaning the four mirror surfaces, the mirror surface is allowed to dry, and the optical density of each mirror surface is measured using an X-Rite 518 spectrodensitometer. performs a full calibration as described in the user's manual. The instrument is configured according to the instructions in the manual in density measurement mode minus reference. The four mirror surfaces of 71.1 x 71.1 cm (28"x 28") are cleaned as described above to represent an original condition. A single reading of a mirror is completed in the original condition that is stored as Ref1 and is used as a reference for all subsequent measurements. A series of 9, 12 or 15 measurements is made in each of the 4 mirrors (3, 4 or 5, respectively, in the upper part, 3, 4 or 5, respectively, in the middle and 3, 4 or 5, respectively). respectively, at the bottom, always keeping a minimum of 7.6 cm (3 in.) from the edge of the mirror), as illustrated, p. eg, in Figure 2. In the laboratory, the support for the mirror cleaning test is oriented so as not to receive direct general light and is rotated so that the mirror being evaluated is oriented towards an interior wall and minimize, In this way, any influence caused by external lighting differences. The measurements were carried out on each of the mirrors in the original condition. The 9, 12 or 15 individual values of each mirror are averaged. It was discovered that the average values are consistent between mirrors; however, as expected, the average values show a small difference from the single reference point. This difference was used to correct all the average values subsequently measured. Additionally, the average values for the mirrors were determined after the application of the model soils. Then, following the cleaning procedure with the sample sample, 9, 12 or 15 density readings are made, and an average value of the densitometer is reported for each of the mirrors. The average densitometer value of mirror cleaning is the average of the average densitometer values obtained along the 4 mirrors. The orientation of the mirrors and the ambient lighting is such that the veins are not easily visible, which ensures a random place for each measurement taken within the limitations of the 3x3, 3x4 or 3x5 grid described above.

Volatile organic carbon (VOC) test method The VOC content of an article of manufacture, expressed in units of weight of VOC by weight of the polymer (absorbing agent / s) is determined in the manner described below. The VOC content of water-in-oil emulsions and dehydrated emulsions is determined by the use of EPA method 24. Specifically, the following procedure was used: % volatiles: 1. An aluminum drying dish is weighed using an analytical balance of 4 decimals. 2. The sample is balanced by mixing gently to ensure representative sampling. 3. Approximately 1 gram of pure material is added to the pre-weighed aluminum plate and weighed on the 4 decimals analytical balance. 4. The weight of stage 3 minus the weight of stage 1 is equal to the weight of the sample. 5. Place the aluminum saucer with the sample in an oven at 105 ° C for 1 hour. 6. Remove the aluminum saucer and dry sample from the oven, and place them in a desiccator to cool. 7. The aluminum plate is re-weighed and the sample cooled on the analytical balance of 4 decimals. 8. The difference in weight in stage 7 minus stage 1 equals to residual weight. 9. The residual weight determined in step 8 is divided by the weight of the sample from stage 4 x 100 =% solids at 105 ° C. 10. 100 minus% solid determined in stage 9 equals% volatiles at 105 ° C. % moisture by Karl Fischer: The industry-standard volumetric titration uses a specific Metler DL18 or Karl Fischer DL31 titrator, a two-component reagent system and a Mettler DM143-SC platinum double-pin electrode. Alternatively, moisture can be determined by AST D 4017 standard.

% VOC: % VOC =% Volatile -% Humidity.

Load density test method If the dirt absorbing agent has been identified or known in and / or on an article of manufacture, then the charge density of the soil absorbing agent can be determined with a particle charge detector (PCD) Mutek PCD-04, available of BTG, or equivalent instrument. The following guidelines provided by BTG are used. Obviously, manufacturers of articles of manufacture comprising dirt-absorbing agents know which (is) the dirt absorbing agent (s) included in their articles of manufacture. Therefore, these manufacturers and / or suppliers of the dirt-absorbing agents in the articles of manufacture can Determine the charge density of the dirt absorbing agent. 1. Start with a 0.1% solution (0.1 g of dirt-absorbing agent + 99.9 g of deionized water). The preparation of the aqueous solutions diluted in deionized water from inverse or dehydrated inverse emulsions is carried out according to the instructions of the supplier of the emulsions and is known to a person skilled in the art. Depending on the titrant, the content of the dirt absorbing agent increases or decreases. The pH of the solution is adjusted before the final dilution, since the charge density of many additives depends on the pH of the solution. Here pH of 4.5 is used for cationic polymers and between 6-7 for anionic polymers. It was not necessary to adjust the pH for the anionic polymers included in this study. 2. 20 ml of sample is placed in the PCD measurement cell and the plunger is inserted. 3. Place the measuring cell with the plunger and the sample in the PCD, with the electrodes facing the back. Slide the cell along the guide until it touches the back. 4. The plunger is pulled up and turned counterclockwise to lock the plunger in place. 5. The engine is started. The flow potential is shown on the digital panel. A time of 2 minutes is expected until the signal is stable. 6. An opposite charge titrant is used (eg, for a sample cationic having a positive flow potential an anionic titrant is used). The BTG available titrators consist of 0.001 N PVSK or 0.001 N PoliDADMAC. 7. An automatic titrant available from BTG is used. After selecting the appropriate titrant, the titrator is set to rinse the tubes when dosing 10 ml to ensure the purge of all air bubbles. 8. The tip of the tubes is placed below the surface of the sample and the titration begins. The automatic titrator is set to stop automatically when the potential reaches 0 mV. 9. The titrant's consumption is recorded; ideally, the titrant's consumption should be 0.2 mi to 10 mi; otherwise, the content of the dirt absorbing agent is increased or decreased. 10. The titration of a second aliquot of 20 ml of the sample of the dirt-absorbing agent is repeated. 11. The load demand (of solution) or load demand (of solids) is calculated; Load demand (eq / l) = V titrant used (l) x Conc. Titrant under normal conditions í§g / ü Volume of samples titled (I) Load density (eq / g) = V titrant used (l) x Conc. Titrant under normal conditions ÍS3 /.

Weight of solids of the sample or its active substance (g) The charge density (charge demand) of a soil absorbing agent is reported in units of meq / g.

UL viscosity test method 1) Reagents and equipment a) NaCI, b) Deionized water, c) 9 moles of ethoxylated nonyl phenol (eg, SYNPERONIC NP9 of ICI surfactant), d) Mechanical agitator with a stainless steel shank equipped at the end with propeller type blades of approximately 2 cm radius, e) Tall glass of 600 ml, f) Disposable syringes (5 ml, 2 ml and 10 ml) g) Balance with precision up to 0.001 g, h) Thermometer, i) 200 μ sieve ?? stainless steel. 2) Preparation of a polymer solution in initial water at 0.5% a) A clean glass of 600 ml is obtained and filled with 100 g of deionized water, b) Start stirring with the mechanical stirrer at 500 rpm to generate a vortex, c) Calculate the weight of the pure emulsion (W0) required for get 0.5 g of polymer, Wo = 50 / C C is the percentage of active matter in the emulsion d) Approximately the weight (W0) of the emulsion is removed in a plastic syringe, e) Weigh the syringe accurately and record the full weight (WF), f) Rapidly disperse the contents of the syringe into the vortex of the vessel, g) Leave stirring for 30 minutes, h) Weigh the empty syringe and record the empty weight (WE), i) Calculate W = WF - WE.

A 0.1% polymer solution in 1 M NaCl is prepared a) The vessel is removed from the agitator; the stem and the blades are allowed to drain completely over the beaker, b) Place the glass on the scale and weigh it carefully. i) 0.2 g of ethoxylated nonyl phenol ii) (QE) g of deionized water, where QE = W x (9.7949 x C - 1) - 100.2, c) Leave stirring again for 5 minutes at 500 rpm, d) Then add the Qs in g: let it stir for 5 minutes, where Qs = 0.585 x W x C, e) This results in a polymer solution at 0.1% in 1 M NaCl, f) The polymer solution is now ready to be measured after being filtered through a 200 μ sieve.

In the case of a high molecular weight emulsion (UL viscosity) greater than 7 cP) a) The 0.5% solution is prepared as in stage 2. b) The vessel is removed from the agitator; the stem and the blades are allowed to drain completely over the beaker, c) Place the glass on the scale and weigh it carefully. i) 0.2 g of ethoxylated nonyl phenol, ii) (QE) g of deionized water, where QE = W x (9.7949 x C - 1) - 100.2, d) Let stir again for 5 minutes at 850 rpm, e) Then add the Qs in g; it is left stirring for 5 minutes at 850 rpm, where Qs = 0.585 x W x C f) This results in a polymer solution at 0.1% in 1 M NaCl, g) The polymer solution is now ready to measure the viscosity after being filtered through a 200 μm sieve. 5) Measurement of the viscosity of the polymer solution Viscosity is determined with a Brookfield viscometer model LVT with UL adapter and 60 rpm spindle speed a) Place 16 ml of the solution in a cup, and the temperature is adjusted to 23-25 ° C. The cup is then adjusted to the viscometer. b) The spindle is allowed to rotate at 60 rpm until the reading is stable on the disk (approximately 30 seconds); c) The value indicated on the disk is read: Viscosity (in cP) = (reading -0.4) x 0.1 Vertical full sheet test method (VFS) The vertical full sheet (VFS) test method determines the amount of distilled water that absorbs and retains a fibrous structure of the present invention. This method is applied by first weighing a sample of the fibrous structure to be tested (referred to herein as "dry sample weight"), then wetting the sample completely, draining the wet sample vertically and then weighing it again (mentioned in the present as "wet weight of the sample"). Then, the absorption capacity of the sample is calculated as the amount of water retained in units of grams of water absorbed by the sample. When evaluating different samples of fibrous structure, the same size of fibrous structure is used for all samples evaluated.

The apparatus for determining the VFS capacity of fibrous structures comprises the following: 1) An electronic balance with a sensitivity of at least ± 0.01 grams and a minimum capacity of 1200 grams. The balance must be placed on a balance table and on a slab to minimize the vibration effects of the weight of the floor / work table. The balance must also have a special scale tray that is capable of supporting the size of the sample evaluated (ie, a sample of fibrous structure approximately 27.9 cm (11 in) by 27.9 cm (11 in)). The scale tray can be manufactured from a variety of materials. The plexiglass is a common material used. 2) In addition, a sample support frame (Figures 3 / 3A) and a sample support frame cover (Fig. 4 / 4A) are required. Both the frame and the cover comprise a metal support light, strung with a monofilament of 0.305 cm (0.012 inches) in diameter to form a grid, as shown in Figures 3 / 3A. The size of the support frame and the cover is such that the size of the sample can be conveniently placed between the two.

The VFS test is performed in an environment maintained at 23 ± 1 ° C and 50 ± 2% relative humidity. A reservoir or tube for water is filled with distilled water at 23 ± 1 ° C to a depth of 7.6 cm (3 inches).

Eight samples of a 7.5-inch (7.5-inch) to 27.94-cm (11-inch) x 27.94-cm (11-inch) fibrous structure to be tested are carefully weighed into the balance at the nearest 0.01 grams. The dry weight of each sample is reported to the nearest 0.01 grams. The empty sample holder frame is placed on the balance with the special scale tray described above. Then the scale is reset to zero (tare). A sample is carefully placed in the sample holder frame. The cover of the support frame is placed on top of the support frame. The sample (now sandwiched between the frame and the cover) is immersed in the water receptacle. After 60 seconds of immersion of the sample, the support frame and the sample cover are carefully lifted out of the tank.

The sample, the support frame and the cover can be drained vertically for 60 ± 5 seconds, taking care not to shake or vibrate the sample excessively. While the sample is draining, the frame cover is carefully removed and all excess water is removed from the support frame. The wet sample and the support frame are weighed on the previously tared scale. The weight is recorded with an approximation of 0.01 g. This is the wet weight of the sample.

The procedure is repeated with another sample of the fibrous structure; however, the sample is placed in the support frame so that the sample rotates 90 ° compared to the position of the first sample in the support frame.

The absorption capacity per gram of the fibrous structure sample of the sample is defined as (wet weight of the sample - dry weight of the sample). The calculated VFS is the average of the absorption capacities of the two samples of the fibrous structure.

The dimensions and values described in the present description should not be understood as strictly limited to the exact numerical values mentioned. Instead, unless otherwise specified, each of these dimensions will refer to both the aforementioned value and a functionally equivalent range comprising that value. For example, a dimension described as "40 mm" refers to "approximately 40 mm." All documents mentioned in the present description, including any cross reference or patent or related application, are incorporated in the present description in their entirety as a reference, unless expressly excluded or limited in any other way. The mention of any document is not an admission that it constitutes a prior matter with respect to any invention described or claimed herein or that alone, or in any combination with any other reference or references, teaches, suggests or describes said invention. In addition, to the extent that any meaning or definition of a term in this document contradicts any meaning or definition of the same term in a document incorporated by reference, the meaning or definition assigned to that term in this document shall govern.

Although particular 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. Therefore, the appended claims are intended to cover all those modifications and changes that fall within the scope of this invention.

Claims

1. An article of manufacture comprising more than 0 # / ton to less than 6 # / ton of a dirt absorbing agent, characterized in that the article of manufacture has a densitometer value of mirror 2 greater than the value of the mirror densitometer 1 measured according to the mirror cleaning test method, and wherein the difference between the mirror densitometer value 2 and the mirror densitometer value 1 is greater than -0.20, and wherein the article of manufacture presents a sum of the mirror densitometer value 2 and the mirror densitometer value 1 greater than -0.48, measured according to the mirror cleaning test method.

2. The article of manufacture according to claim 1, further characterized in that the article of manufacture has a sum of the densitometer values of the mirror 1 and the mirror 2 that is greater than -0.45 or greater according to the test method of cleaning of mirrors.

3. The article of manufacture according to claim 1, further characterized in that the value of the mirror densitometer 2 is statistically equivalent to the value of the mirror densitometer 1.

4. The article of manufacture according to claim 1, further characterized in that the article of manufacture has a mirror densitometer value 2 greater than -0.27, preferably, greater than -0.21, more preferably, greater than -0.17, more preferably , greater than -0.10, more preferably, greater than -0.06, measured according to the mirror cleaning test method described in the present description.

5. The article of manufacture according to claim 1, further characterized in that the article of manufacture has a densitometer value of mirror 1 greater than -0.20, preferably, greater than -0.15, more preferably, greater than -0.10, measured according to the mirror cleaning test method described in the present description.

6. The article of manufacture according to any preceding claim, further characterized in that the article of manufacture comprises a weft, preferably, a fibrous structure, more preferably, a sanitary paper product, more preferably, a paper towel or an underwire pad. cleaning.

7. The article of manufacture according to claim 6, further characterized in that the weft comprises a plurality of pulp fibers.

8. The article of manufacture according to any preceding claim, further characterized in that the article of manufacture comprises a foam structure.

9. The article of manufacture according to any preceding claim, further characterized in that the article of manufacture has a moisture concentration of less than 30%.

10. The article of manufacture according to claim 1, further characterized in that the soil absorbing agent comprises a polymer, preferably, wherein the polymer comprises a monomer unit derived from a quaternary ammonium compound or a monomer unit derived from an amine compound or a monomer unit derived from an acrylamide compound.

11. The article of manufacture according to any preceding claim, further characterized in that the soil absorbing agent comprises a flocculating agent.

12. The article of manufacture according to any preceding claim, further characterized in that the dirt absorbing agent is present in the article of manufacture at a level of 5 # / ton or less, preferably, 4 # / ton or less, more preferably 2 # / ton or less, more preferably, 1 # / ton or less, more preferably 0.5 # / ton or less.

13. The article of manufacture according to any preceding claim, further characterized in that the article of manufacture comprises a surfactant, preferably, wherein the surfactant is present in the article of manufacture in a concentration of 0.01% to 0.5% by weight of the article of manufacture .

14. The article of manufacture according to any preceding claim, further characterized in that the dirt absorbing agent is applied to the article of manufacture as a soil absorbing agent composition comprising a first soil absorbing agent having a VOC content greater than 20% and a second soil absorbing agent having a VOC content of less than 20% measured according to the VOC test method, preferably, wherein the soil absorbing agent composition has a VOC content of less than 20% measured according to the VOC test method.

15. The article of manufacture according to claim 14, further characterized in that the dirt absorbing agent has a total volatile content of less than 55%, measured according to the VOC test method.