KR102240148B1 - Substrates comprising frothed benefit agents for enhanced substrate benefits - Google Patents

Abstract

The present invention is a fibrous web defining a surface; And a layer of a benefit agent, wherein the benefit agent is selected from additive compositions, enhancement components, and combinations thereof; The benefit agent is foamed and bonded to the fibrous web surface through a creping process; Non-woven substrates show improved tactile sensation, improved printing, reduced hysteresis, increased bulk, increased elasticity/extensibility, increased shrinkage, reduced wrinkles, and an improvement selected from combinations thereof compared to untreated substrates.

Description

Substrates containing foamed benefit agents for improved substrate benefits {SUBSTRATES COMPRISING FROTHED BENEFIT AGENTS FOR ENHANCED SUBSTRATE BENEFITS}

Cross-reference to related applications

This application is a continuation in part of US Patent Application No. 13/330440 filed on December 19, 2011, which is a continuation in part of US Patent Application No. 12/979852 filed on December 28, 2010.

Technical field

The present invention provides improved tactile sensation compared to untreated substrates, improved printing, reduced hysteresis, increased bulk, increased elasticity/extensibility, increased retractability, decreased rugosities, and other beneficial product use advantages. The present invention relates to a creped nonwoven substrate comprising a frothed polymer and additional softness enhancers.

It is designed to have the desired level of bulk, ductility, and strength. For example, in some tissue products, ductility is enhanced by topical additive compositions, such as softeners, to the outer surface(s) of the tissue web. Such an additive composition may be a bonding agent applied topically to a substrate such as a nonwoven fabric, alone or in combination with a creping operation. Creping may be part of a nonwoven fabric manufacturing process in which tissue is attached to the hot surface of a rotary dryer drum by an additive composition. The dried tissue and additive composition are scraped together from the dryer drum by a doctor blade assembly. Creping adds bulk to the tissue base sheet, thus increasing the ductility determined by the hand feel. Other properties such as strength, flexibility and crepe fold are also affected. Typically, the additive composition may be sprayed onto a dryer drum of a Yankee dryer. However, the spraying process has a low chemical efficiency level (40% to 70%) due to the relatively high dryer temperature and wastage of the additive composition caused by the air boundary layer near the dryer surface. If necessary, the applicator is typically about 4 inches (101.6 mm) from the dryer surface. Due to the high rotational speed of the dryer, the boundary layer of air near the dryer surface is pulled, creating a pressure barrier that prevents spray particles from reaching the dryer surface.

Also, it is somewhat limited to modify any additive to include short fibers and additional solid particles that improve the overall ductility of the substrate. Many additional particles that can improve the final hand feel of the substrate need to be mixed in the dispersion sprayed onto the dryer. Since many of these particles are larger than the spray nozzles, clogging of the nozzles that prevent the additive dispersion from being properly applied onto the dryer surface is a problem. Accordingly, there is a need for a method of applying an additive composition alone or in combination with improved softening particles to a dryer surface and consequently to a substrate to provide a substrate with improved ductility.

The present invention provides a nonwoven substrate comprising a fibrous web defining a surface and a layer of a benefit agent, the benefit agent being selected from additive compositions, enhancement components, and combinations thereof, The benefit agent is foamed and bonded to the surface of the fibrous web through a creping process, and the nonwoven substrate has an improved tactile feel, improved printing, reduced hysteresis, increased bulk, increased elasticity/extensibility, and shrinkage compared to the untreated substrate. It shows an improvement selected from an increase, a decrease in wrinkles, and a combination thereof.

To illustrate the invention, exemplary forms are shown in the drawings, but it is to be understood that the invention is not limited to the specific arrangements and means shown.
1 is a schematic diagram of the process steps used to produce an embodiment of a froth according to the present invention.
2 shows an SEM image of an untreated spunbond with printed ink.
3 shows an SEM image of an embodiment of the present invention, in which spunbond was used as a substrate treated according to the present invention and printed with ink.
4 is a graphical representation of elastic strain versus applied strain for examples of hydroknit materials treated in accordance with the present invention with comparative data of an untreated substrate.
5 is a graphical illustration of elastic strain versus applied strain for an example of a spunbond material treated in accordance with the present invention with comparative data of an untreated substrate.
6 is a series of SEM photographs showing structural changes of tissue material after being treated by an embodiment of the present invention.
7 shows the machine direction (MD) elastic strain versus applied strain of an embodiment of a tissue substrate treated in accordance with the present invention with comparative data of the untreated tissue substrate.
Figure 8 shows the cross-direction (CD) elastic strain versus applied strain of an embodiment of a tissue substrate treated in accordance with the present invention with comparative data of the untreated tissue substrate.
9 shows SEM images of an untreated control film.
(a) shows an SEM image of one side of an untreated control film.
(b) shows an SEM image of the opposite side of the untreated control film.
(c) shows an SEM image of the cross-sectional view of the untreated control film.
(d) shows an SEM image of a cross-sectional view of an untreated control film at a magnification of 5X in FIG. 9C.
10 is standing in the road that shows the benefit of one embodiment the collapsing of the foam (foam) SEM image of the film layer according to the invention, this embodiment includes a HYPOD ^® dispersion,
(a) shows an SEM image of one side of the collapsed foam film layer.
(b) shows an SEM image of the opposite side of the collapsed foam film layer.
(c) shows an SEM image of the cross-sectional view of the collapsed foam film layer.
(d) shows a SEM image of a cross-sectional view of the collapsed foam film layer as viewed at a magnification of approximately 2X in FIG. 10C.
(e) shows an SEM image of a cross-sectional view of the collapsed foam film layer as viewed at approximately 7X magnification in FIG. 10C.
(f) shows an SEM image of a cross-sectional view of the collapsed foam film layer as viewed at 25X magnification in FIG. 10C.

Although particular mention of and specifically claiming the invention is included herein within the scope of the claims, it is believed that the invention will be better understood from the following detailed description.

Unless otherwise specified herein, all percentages, parts and ratios are based on the total weight of the composition of the present invention. All such weights pertaining to the listed ingredients are based on the active level and, therefore, do not include solvents or by-products that may be included in commercially available materials, unless otherwise specified. The term "weight percent" is denoted herein as "weight percent". Numerical values recited herein should be considered to be limited to the term "about", except that specific examples of actual measured values are presented.

As used herein, the term "comprising" means that other steps and other ingredients may be added that do not affect the final result. These terms include the terms “consisting of” and “consisting essentially of”. The compositions and methods/processes of the present invention may include, as well as the essential elements and limitations of the present invention disclosed herein, as well as additional and optional ingredients, ingredients, steps or limitations disclosed herein. It may consist of, and may consist essentially of these.

As used herein, “additive composition” refers to chemical additives (sometimes referred to as chemicals, chemicals, chemical compositions and add-ons) that are applied topically to a substrate. Topical application according to the method of the invention can take place during the drying process or the conversion process. The additive composition according to the present invention may be applied to any substrate (eg, tissue or nonwoven), and may include, but is not limited to, a polymer dispersion, a polymer solution, and a mixture thereof.

As used herein, an "airlaid web" is formed by an air forming process, and a bundle of small fibers having a typical length in the range of about 3 to about 52 millimeters (mm) is an air supply. After being separated and trapped within, they are deposited on a forming screen, usually with the aid of a vacuum supply, and then the randomly deposited fibers are bonded together using, for example, hot air or a spray adhesive. The preparation of laid nonwoven composites is well defined and documented in the prior literature, for example the DanWeb process, Kroyer, as described in US Pat. No. 4,640,810 issued to Laursen et al and assigned to Scan Web of North America Inc. The Kroyer process described in U.S. Patent No. 4,494,278 to Niro Separation a/s and U.S. Patent No. 5,527,171 to Soerensen assigned to Niro Separation a/s, and the method of U.S. Patent No. There are methods, but are not limited thereto.

A “Benefit Agent” is a composition or ingredient that provides an advantage to an entirely treated substrate, such as softness, smoothness, moisture, fragrance. The benefit agents of the present invention include, but are not limited to, "additive composition" and "enhancement component".

“Bonded Carded Web”, ie “BCW”, is known to those of ordinary skill in the art and, by way of example, in U.S. Patent No. 4,488,928, which is incorporated herein by reference to the extent not in conflict with the present invention. It refers to a nonwoven web formed by the carding process described further. In the carding process, blends of staple fibers, bonding fibers and possibly other bonding components such as adhesives may be used. These components are formed into bulky balls that have been combed or otherwise processed to produce a substantially uniform basis weight. This web is heated or otherwise treated to activate any adhesive component, resulting in a lofty nonwoven material.

As used herein, “coform” is a meltblown polymeric material to which fibers or other ingredients may be added. In its most basic concept, a coform can be formed by having at least one meltblown die head arranged near a chute through which other materials are added to the meltblown material as the web is formed. These “other materials” may be natural fibers, superabsorbent particles, natural polymer fibers (eg rayon) and/or synthetic polymer fibers (eg polypropylene or polyester). This fiber can be made up of staple lengths. The coform material may contain a cellulosic material in an amount from about 10% to about 80% by weight, such as from about 30% to about 70% by weight. By way of example, in one embodiment, a coform material containing pulp fibers may be produced in an amount of about 40% to about 60% by weight.

As defined herein, "Creping" occurs when a web attached to the dryer surface is peeled off with a blade such as a doctor blade.

The "Enhancement Component" of the present invention is a benefit agent, which is an additional component that can be added to the additive composition to impart additional benefits or other tactile sensations that cannot be achieved with the additive composition alone. Enhancing components include, but are not limited to, microparticles, expandable microspheres, fibers, additional polymer dispersions, scents, antibacterial agents, humidifiers, drugs, soothers, and the like.

"Froth" as defined herein is a liquid foam. According to the present invention, when the foamable composition of the present invention is heated on the surface of the dryer, it does not form a solid foam structure. Instead, the frothable composition, when applied to a heated surface, transitions into a substantially continuous film with air bubbles inside the film.

The "hydroentangled web" according to the present invention refers to a web treated with columnar jets of fluid that entangle the web fibers. Hydroentanglement of the web typically increases the strength of the web. In one aspect, the pulp fibers can be hydroentangled into a continuous filament material such as a “spunbond web”. The hydroentangled web resulting in the nonwoven composite may comprise pulp fibers in an amount of about 50% to about 80% by weight, such as an amount of about 70% by weight. Hydro entangled composite web as described above, under the trade name of trade name HYDROKNIT ^® is sold by Kimberly-Clark Corporation. Hydroentanglement is disclosed, for example, in US Pat. No. 5,389,202 to Everhart.

"Non-woven" as used herein is defined as a class of fibers that are generally produced by attaching the fibers together. The nonwoven fabric is formed by mechanical means, chemical means, thermal means, adhesive or solvent means, or any combination thereof. Nonwoven manufacturing is different from weaving, knitting or tufting. Non-woven fabrics can be made of natural polymers such as cellulose or synthetic thermoplastic polymers. Cellulose tissue is an example of a nonwoven material.

As used herein, "melt blowing" is a nonwoven web forming process in which a molten polymer resin is extruded and stretched with heated high-speed air to form fine filaments. The filaments are cooled and collected as a web on a moving screen. This process is similar to the spunbond process, but meltblown fibers are finer and are usually measured in micrometers.

As used herein, “processing aid” refers to a composition that can aid in the process of forming the treated substrate of the present invention. By way of example, a foaming agent can function as a suitable processing aid of the present invention. In addition, creping aids can aid in additional adhesion or separation properties for creping the substrate from the dryer drum.

As used herein, "rugosities" are channeled wrinkles as a result of an elastic material (film or filament) that is pre-stretched while attached to a non-stretch material substrate (such as a nonwoven fabric). Describe the behavior of the visible elastic laminate. Wrinkles can depend on how the laminate is attached or bonded to the non-stretch material substrate. When the laminate is relaxed or released, the substrate appears as a grooved or channel wrinkle similar to that of an accordion instrument. This effect is common in personal care products where cuffs and waistbands are often pleated to provide a better fit to the wearer. Further, wrinkles are disclosed in more detail in U.S. Patent No. 6475600 to Morman et al. issued on November 5, 2002.

“Spunbond” as used herein is a nonwoven web process in which filaments are extruded, drawn and placed on a moving screen to form a web. The term “spunbond” is often used interchangeably with “spunlaid”, but the term spunbond or spunbonded has been generally adopted in the art to refer to a particular web forming process. This is to distinguish the web forming process from the other two forms of spunlaid web formation, meltblowing and flashspinning.

"Spunbond/meltblown composite" as used herein is generally defined by a multilayer fabric consisting of various alternating layers of a spunbond web ("S") and a meltblown web ("M"). It is: SMS, SMMS, SSMMS, etc.

As used herein, “tissue” generally refers to various paper products such as beauty tissues, bathroom tissues, paper towels, table napkins, sanitary napkins, and the like. The tissue products of the present invention can generally be made from a cellulosic web having one or more layers. As an example, in one embodiment, a cellulose or “paper” product may comprise a single layer paper web formed from a blend of fibers. In another embodiment, the paper product may comprise a multilayer paper (ie, layered) web. Further, the paper product may be a single or multi-ply product (eg, more than one paper web), wherein at least one of the plies may comprise a paper web formed in accordance with the present invention.

The present invention is an alternative to current methods of spraying a solution or aqueous dispersion of a creping chemical onto a dryer surface (eg, a drum of a Yankee dryer or a hot calender). In contrast to liquid chemicals, foamed chemicals have sufficient structural integrity to reach the dryer surface against gravity due to their markedly high viscosity. By creating the foamed chemistry according to the present invention, the chemical applicator can be placed much closer to the dryer surface. In addition, by using the foamed chemical agent of the present invention, additional advantages that were difficult to apply in other ways can be included.

Another advantage of the present invention is that less energy is consumed by the dryer. By bringing the chemical applicator closer to the dryer surface, it improves the chemical mass efficiency (ie, reduces the waste in the application process) and improves energy efficiency. The efficiency is increased because the air introduced into the foam of the present invention acts as a diluent. As a result, less heat is required to remove water from the foamed creping chemistry (ie, benefit agent) during the drying process. This is an improvement over the spraying process that uses water to dilute the benefit agent.

In addition, after the creping step, a layer of benefit agent remains on the nonwoven substrate to add more bulk and ductility. This increase in bulk is due to air trapped inside the coated layer. The improved ductility is due to the benefit agent that can foam onto the dryer surface and subsequently transfer to or adhere to the surface of the substrate through a creping process. Although the foamed benefit agent becomes a film during the drying step, not all of the air trapped in the foam during the drying step is lost due to the higher viscosity associated with the higher solids level in the foamed additive composition.

The “film” of the benefit agent is more appropriately and precisely described as a “collapsed foam film layer”. To better understand this, FIG. 9 shows a conventional film (such as a cast, extruded, or blown film). As shown in Fig. 9A, the film has some voids on one side, but is relatively smooth, and as shown in Fig. 9B, it is completely smooth on the other side. 9C and 9D, it can be seen that the voids of the film are relatively parallel to the horizontal axis of the film. In contrast, Figure 10 shows a layer of the collapsed foam film of the present invention. Both sides of the collapsed foam film layer as shown in FIGS. 10A and 10B exhibit a unique sparse structure that allows them to retain differences in both mechanical and tactile properties compared to conventional films. 10C-10F show enlarged cross-sectional views of one embodiment of the collapsed foam film layer of the present invention. As shown, the foamed benefit layer retains voids of air trapped by the foam, which leads to the advantages provided by the present invention. Also, it is easy to see the sparse structure in the Z direction, where the voids in the layer are more perpendicular to the horizontal axis of the layer. Accordingly, the present invention does not simply provide a film in the conventional sense, but provides an advantageous collapsed foam film layer through foaming and creping that provides enhancements and improvements as described herein.

Various substrates other than tissue can be treated according to the present invention. For example, wet-laid webs, airlaid webs, spunbond webs, meltdown webs, coform webs, bonded & carded webs (BCW), continuous films, spunlaces, film/laminate sheets and Including, but not limited to, hydroentangled webs. The benefit agent is usually applied on one side of any substrate, but may be applied on both sides as necessary.

Benefit agent

1. Additive composition

In required applications, the additive composition is from about 50mg / m ² to about 10,000mg / m ² or from about 50mg / m ² to about 1000mg / m ² or from about 100mg / m ² to about be present at a level of 1000mg / m ² have. The difference between these suggested ranges is whether the additive composition is applied to the substrate by an in-line machine (such as a tissue machine) or to the substrate by an off-line machine (such as a non-woven conversion line). Depends on whether it applies or not. The additive composition of the present invention may be in the form of a polymer solution or a polymer dispersion as described below.

A. Polymer dispersion

The foamable composition of the insoluble polymer may be in the form of a dispersion. Solid insoluble polymeric materials such as powders and granules can be converted into foamable dispersions by mixing them with water and surfactant(s) under certain processing conditions such as high pressure extrusion at elevated temperatures. The polymer dispersion can then be mixed with air and a blowing agent to convert it into a foam.

Examples of dispersions according to the present invention are ^{polyolefin dispersions such as HYPOD 8510 ®} sold by Dow Chemical of Freeport, Texas, USA, and polyisoprene dispersions such as ^{KRATON ®} sold by Kraton Polymers US LLC, Houston, Texas. , or styrene-ethylene-butylene-styrene (SEBS) copolymer, New Jersey polhaem Park polybutadiene such as Butanol ^® which is sold by BASF Corporation of material-styrene block copolymer, Germany and sold by Wacker of Munich, latex dispersions, such as E-PLUS ^®, which, on the market all by Aldrich in Wisconsin Milwaukee, polyvinylpyrrolidone-styrene copolymer dispersions, and polyvinyl alcohol-containing ethylene copolymer dispersion, but are not limited to .

B. Polymer solution

In addition, the foamable composition of the water-soluble polymer may exist in the form of a solution. Solid water-soluble polymeric materials such as powders and granules may be dissolved in the solution. The polymer solution can then be mixed with air and a blowing agent to convert it into a foam.

Examples of polymer solutions according to the present invention include both synthetic and natural water-soluble polymers. Synthetic water-soluble polymers include, but are not limited to, polyalcohols, polyamines, polyimines, polyamides, polycarboxylic acids, polyoxides, polyglycols, polyethers, polyesters, copolymers and mixtures as listed.

Natural water-soluble polymers include modified cellulose such as cellulose ethers and esters, modified starch, chitosan and salts thereof, carrageenan, agar, gellan gum, guar gum (guar gum), other modified polysaccharides and proteins, and combinations thereof. In one particular embodiment, the water-soluble polymer also includes poly(acrylic acid) and salts thereof, poly(acrylate ester) and poly(acrylic acid) copolymers. Other suitable water-soluble polymers include polysaccharides of sufficient chain length to form films, such as, but not limited to, pulleran and pectin. For example, the water-soluble polymer may contain a monoethylenically unsaturated monomer that does not contain a pendant acid group but is copolymerizable with a monomer-bearing acid group. Such compounds include, for example, monoacrylic esters and monomethacrylic esters of polyethylene glycol or polypropylene glycol, and the molecular weight (Mn) of the polyalkylene glycol is, for example, up to about 2,000.

In another particular embodiment, the water-soluble polymer may be a hydroxypropyl cellulose (HPC), which is sold by Ashland, Inc., e.g. under the trademark KLUCEL ^®. The water-soluble polymer can be present in the additive composition in any functional amount and will vary based on the final properties required and the selected chemical component. For example, in the case of the example of KLUCEL ^®, biodegradable, water-soluble polymer, to provide improved benefits, from about 1% to about 75%, based on the total weight of the additive composition, or at least about 1%, at least about 5%, or at least about 10%, or up to about 30%, up to about 50% or up to about 75%. Other examples of suitable water-soluble polymers include methyl, which is sold by Ashland, Inc., e.g. under the trademark BENECEL ^® cellulose (MC), the trade name of NATROSOL ^® and sold by Ashland, Inc. hydroxyethyl cellulose, and 800 ^®, which GLUCOSOL It includes hydroxypropyl starch marketed by Chemstar (Minneapolis, Minnesota, USA) under the trade name of. All of these chemicals, once diluted in water, are placed on the hot, non-porous dryer surface and ultimately deliver the chemical to the web surface. Water-soluble polymers in these chemicals include, but are not limited to, polyvinyl alcohol, polyethylene glycol, polyethylene oxide, hydroxypropyl starch, hydroxypropyl cellulose, and combinations thereof.

Conventional creping chemicals for tissue production may include a water-soluble polymer solution such as an aqueous mixture containing polyvinyl alcohol and polyamide-epihalohydrin resin. These conventional creping chemistries include water-soluble polymer solutions, but cannot provide the advantages of the present invention, including improved ductility, without compromising the strength of the tissue sheet.

The additive composition of the present invention can be HYPOD 8510 ^® dispersion which is sold by Dow Chemical Corporation, water, polyethylene-octene copolymer made up, and a copolymer of ethylene and acrylic acid. Polyethylene-octene copolymers, which are marketed by Dow Chemical Corporation under the trade name AFFINITY ^® (type 2980I), copolymers of acrylic acid and ethylene is being marketed by Dow Chemical Corporation under the trade name PRIMACOR ^® (type 59 081). PRIMACOR ^® acts as a surfactant to emulsify and stabilize AFFINITY ^{® dispersion particles.} The acrylic acid copolymer of PRIMACOR ^® is neutralized by potassium hydroxide to a degree of neutralization of 80%. Therefore, in comparison, PRIMACOR ^® is more hydrophilic than ^{AFFINITY ®.} In dispersion, PRIMACOR ^® acts as a surfactant or dispersant. Unlike PRIMACOR ^® , AFFINITY ^® takes the form of small droplets with a diameter of several micrometers when suspended in a dispersion. PRIMACOR ^{® molecules surround the AFFINITY ®} droplet to form a "micelle" structure that stabilizes the droplet. HYPOD 8510 ^® contains approximately 60% AFFINITY ^® and 40% PRIMACOR ^® .

When the dispersion becomes a molten liquid on the hot surface of the dryer, AFFINITY ^® forms a continuous phase and PRIMACOR ^® forms a dispersed phase “ocean” forming an island in AFFINITY ^® . This phase change is called a phase inversion. However, the occurrence of this phase inversion depends on external conditions such as temperature, time, molecular weight of the solid, and concentration. Ultimately, phase inversion occurs only when the two polymers (or two phases) have a relaxation time sufficient to allow completion of the phase inversion. In the present invention, the HYPOD 8510 ^® coated film retains the form of a dispersion indicating that the phase inversion is incomplete. The advantage of this remaining dispersion form is a more hydrophilic coating layer due to exposure to the ^{PRIMACOR ®} , and a further improved of the coated product due to trapped air bubbles in ^{the coated HYPOD 8510 ® layer providing extra bulk.} Including, but not limited to, ductility.

Diluted dispersions can have a very low viscosity (about 1 cps almost similar to water). Low viscosity dispersions, when applied to the hot dryer drum, is subjected to a complete phase inversion process of water evaporation and AFFINITY ^®. As a result, the continuous molten film has PRIMACOR ^® dispersion islands embedded therein. The film formed after complete evaporation of water is a solid in which no air bubbles are trapped inside. After transferring the molten film onto the web through a creping process, the thin film covering the surface of the treated tissue is discontinuous but interconnected as described below (see Fig. 6c).

The process of the present invention can use a high solid, high viscosity dispersion (about 10% to about 30%), and can contain a large amount of air bubbles (the air volume is at least 10 times the volume of the dispersion liquid). Preferably, a commercially available HYPOD8510 ^® dispersion (solids of about 42%, including both AFFINITY ^® and PRIMACOR ^®), while having a viscosity of about 500cps, water has a viscosity of about 1cps. Dispersion comprising HYPOD 8510 ^® of about 20% can have a relatively high viscosity of about 200cps, a dispersion having a HYPOD 8510 ^® of less than about 1% may have a closer viscosity to water viscosity (1cp). After a high proportion of air entrapment, ^{the viscosity of the foamed HYPOD 8510 ®} dispersion increases exponentially compared to the dispersion before foaming.

Referring to Fig. 1, when the foamed dispersion is applied onto the non-porous dryer surface 23, a limited amount of water evaporates rapidly therefrom. Slow evaporation of the dispersion due to the high solids combined with the high viscosity prevents the AFFINITY ^® -PRIMACOR ^® dispersion from completing phase inversion (AFFINITY ^® serializes, PRIMACOR ^® becomes the dispersion), trapped air escape It is understood to be preventing. As a result, it results in a unique microstructured molten film on the hot dryer surface.

Referring to Figure 6, the SEM photograph proves the above-described hypothesis. Two immediate advantages can be seen when comparing the surface-treated tissue of the present invention with the surface-treated tissue of the prior art. First, the method of the present invention has a softer hand feel due to the trapping of the air bubbles 21, and has a larger bulk (see Fig. 6B). Second, the tissues of the present invention have a more wettable surface due to incomplete phase reversal, resulting in surface exposure of the hydrophilic component.

6A, 6B, and 6C are visually compared with FIGS. 6A', 6B', and 6C'. The coated layer with trapped air bubbles 21 and dispersing beads 19 shown in FIG. 6B is shown in FIG. 6B' as determined by the In-Hand Ranking Test for tactile sensation disclosed herein. It is softer than the molten film shown in.

II. Enhancement ingredients

The present invention not only provides the substrate with improved ductility due to the benefit agents and processes described herein, but also provides an improved hand feel. Enhancing ingredients are added to the dispersions of the present invention to provide the substrate with a cotton-like/fluffy touch instead of a silky/slippery touch that can often be felt when using the dispersion alone. In addition, the improved hand feel provided by the present invention incorporates properties such as velvety, suede-like, hairy, smooth, fluffy, etc. descriptors used to describe soft tactile sensations. It can be understood that it can include. While silky/slippery feel may be desirable for some substrates, the present invention offers other options to be able to provide a variety of textures and aesthetics. Reinforcing component of the present invention, fiber, polyester, such as micro-particles, such as silica gel particles, and thermally expandable microspheres as such as EXPANCEL ^®, cotton linter flocs (cotton linter flock) - polymers such as poly (vinyl pyrrolidone styrene) Dispersions, and combinations thereof. If cotton linter flocs or other types of fibers are used, they can have a fiber length of about 0.1 mm to about 5 mm.

In addition to the enhancement component that provides a contrasting hand feel, the enhancement component can also provide additional benefits that cannot be achieved with the use of dispersion alone. The enhancing component of the present invention may also contain a fragrance, an antibacterial agent, a humidifier, a soother, a colorant, a hydroxyethyl cellulose, a drug, and a combination thereof. These ingredients provide an overall substrate with an improved feel from the dispersion, with advantages that could not otherwise be provided without the technology of the present invention. The present invention may use any or combination of enhancing ingredients included in the additive composition of the present invention. As an example, the enhancement component may be added to the dispersion of the present invention in an amount of about 0.5% to about 30%, about 1% to about 20%, or about 2% to about 10% by weight of the dispersion composition. .

The enhancement component may be added into the foamed chemical agent before or after the chemical agent is foamed. In a preferred application, the enhancement component level is from about 0.5% to about 30%, or from about 1% to about 20%, or from about 2% to about 10%, based on the total dry weight of the additive composition.

When a reinforcing component is used in combination with the additive composition of the present invention, this reinforcing component enables improved ductility without compromising strength. For example, when a cosmetic tissue is used as a substrate of the present invention, compared to a substrate not treated in the same manner as the present invention, a GMT level of about 800 to about 1200 and a total log odd of about 0.5 to about 18 There is an increase. "GMT" as used herein refers to a combination of a machine direction and a cross-machine direction in determining the tensile strength. The expanded microspheres remain on the surface of both the film and tissue to contribute to improved hand feel when the consumer touches the film and tissue while in use.

III. Processing aid

The processing aids of the present invention include chemicals that can assist in the process of forming the treated substrates of the present invention. Processing aids may appear microscopic or dissipate within the final treated substrate. Processing aids are included only to aid in the process of manufacturing the treated substrate, but may impart some advantages to the substrate for which the present invention is intended. For the purposes of the present application, the "processing aid" is used in a process of applying a benefit agent to a substrate or foaming, and is not used in a process of manufacturing a precursor substrate.

A. Foaming agent

Most commercial blowing agents are suitable for producing the foams of the present invention. Suitable blowing agents include, but are not limited to, low molecular weight or polymeric materials in liquid form. Blowing agents can be anionic, cationic or nonionic. These blowing agents can be classified into four groups according to their function.

1. Air trapping aids-used to enhance the function of liquids (such as dispersions, solutions, or mixtures) for air trapping, which can be measured by determining the "blow ratio". An exemplary list of blowing agents is potassium laurate, sodium lauryl sulfate, ammonium lauryl sulfate, ammonium stearate, potassium oleate, disodium octadecyl Sulfosuccinimate (disodium octadecyl sulfosuccinimate), hydroxypropyl cellulose, and the like, but are not limited thereto.

2. Stabilizer Used to improve the stability of foam bubbles with time and temperature, and includes, for example, sodium lauryl sulfate, ammonium stearate, hydroxypropyl cellulose, and the like, but is not limited thereto.

3. Wetting Agent-Used to improve the wettability of the film-coated dry surface. Examples include, but are not limited to, sodium lauryl sulfate, potassium laurate, disodium octadecyl sulfosuccinimate, and the like.

4. Gelling Agent-Used to stabilize the air bubbles in the foam by allowing the additive composition to take the form of a gel that functions to reinforce the cell walls. Examples include, but are not limited to, hydroxypropyl cellulose, hydroxyethyl cellulose, carboxymethyl cellulose, and other modified cellulose ethers.

Some blowing agents can deliver more than one of the functions described above. Therefore, it is unnecessary to use all four blowing agents in the foamable additive composition. The choice of blowing agent depends on the chemical properties of the additive composition. By way of example, if the additive composition includes an anionic component, such as HYPOD 8510 ^®, suitable blowing agents are to be selected from anionic or non-ionic groups. When a cationic blowing agent is used to improve the foamability of the anionic additive composition, the cationic component of the blowing agent is ionically bonded with the anionic component in the additive composition, so that both the cationic blowing agent and the anionic additive composition form their bonds. It makes it inacceptable. On the other hand, when the additive composition contains a cationic component, the anionic blowing agent is unsuitable for use.

B. Creping aid

Creping aids are chemicals added to the benefit agents of the present invention to optimize the adhesion and separation properties of the tissue substrate to the dryer surface. It is largely classified into the following groups.

1. Adhesion Aid-Used to increase the adhesion of the tissue sheet to the dryer surface. Examples include, but are not limited to, polyvinyl alcohol, polyacrylate, hydroxypropy starch, carboxymethycellulose, kymene, polyvinyl amine, copolymers or mixtures thereof.

2. Release Aid-Used to reduce (to improve release) the adhesion of the tissue sheet to the dryer surface (from the dryer surface). Examples include, but are not limited to, polyethylene glycol, polypropylene glycol, polyethylene oxide, polypropylene oxide, polyolefin, fluorinated polyolefin, and copolymers and blends containing them.

3. Curing Aids Used to accelerate or delay curing of creping packages such as plasticizers or tougheners.

4. Lutensol A 65 N Iconol 24 7 ^{® (commercially available from BASF ®} Chemical Company), hereinafter "Lutensol ^® " may also be used to aid in the creping of the present invention.

Foam generation process

In general, when preparing foam chemicals, a system is used that pumps both liquid and air into the mixer. The mixer mixes air into the liquid to create a foam that essentially contains a plurality of small air bubbles. The foam exits the mixer and flows into the applicator.

One parameter for defining the quality of the foam chemical is the blow ratio, which is defined by the ratio of the volume of small bubbles trapped by the dispersing chemical to the volume of the dispersion before mixing. For example, at a blow ratio of 10:1, a dispersion flow rate of 1 L/min can trap 10 L/min of air into the liquid, resulting in a total foam flow rate of 11 L/min.

In order to achieve a high blow ratio, both the mechanical mixing and foaming functions of the additive composition are determinants. If a chemical agent can only hold or trap air volumes up to a blow ratio of 5, no matter how powerful the foam unit is, it cannot produce a stable foam with a blow ratio of 10. Any excess air exceeding the blow ratio of 5 is released to the outside of the foam system once the mechanical force is removed. In other words, any entrapped air that is greater than the air-containing capacity of the dispersion becomes unstable. Most of these unstable bubbles are discharged from the foam immediately after mechanical agitation is stopped (bubble removal).

1, a system 10 capable of producing a foamed chemistry according to the present invention is schematically illustrated. First, a foamable chemical (eg, HYPOD 8510 ^® , KRATON ^®, etc.) is placed in the chemical tank 12. The chemical tank 12 is connected to the pump 14. It may be desirable to modify the piping 13 between the chemical tank 12 and the pump 14 to be able to deliver the aerated chemical to two different sized pumps. Preferably, the chemical tank 12 is positioned at an elevated height above the pump 14 to keep the pump in its most suitable condition.

One optional small auxiliary pump (not shown) can be used to run the foaming process at a lower speed compared to pump 14. The large main pump 14 can produce flow rates up to 25 L/min liquid flow rates for fast application rates and/or bulk additive compositions. A small auxiliary pump (not shown) can produce liquid flow rates of up to about 500 cc/min for slow application rates and/or small amounts of additive composition.

The flow meter 16 is disposed between the pump(s) 14 and the foam mixer 18. The liquid flow rate is calculated from the desired additive composition, chemical solids, line-speed and applicator width. The flow rate can range from about 5:1 to about 50:1. When using a small auxiliary pump, the flow rate ranges from about 10 cc/min to about 500 cc/min. When using the large pump 14, the flow rate ranges from about 0.5 L/min to about 25 L/min. An air tacho of 20 L/min is chosen when using a small auxiliary pump. There is a 200 L/min air tacho used when operating a large main pump 14.

In one aspect, the foam mixer 18 is used to mix air in a liquid mixture of foamable chemicals to create small bubbles in the foam. Air is metered into the system 10 using a predetermined liquid flow rate and blow rate as described above. Preferably, a foam mixer 18 having a size of 25.4 cm (10 inches) can be used to produce the foam. One possible foam mixer 18 is a CFS-10 inch Foam Generator marketed by Gaston Systems, Inc. of Stanley, NC.

Preferably, the rotational speed of the foam mixer 18 is limited to about 600 rpm. In this process, the rpm speed of the mixer is dependent on the foaming function of the additive composition (i.e., the ability to trap air bubbles to form stable air bubbles). If the additive composition is easily foamed, a low rpm is generally required. If the additive composition does not foam easily, a high rpm is generally required. The high mixer speed helps to accelerate the foaming equilibrium or optimal blow rate. The normal rpm of the mixer is about 20% to 60% of the maximum rpm speed. The type and/or amount of blowing agent added to the additive composition also affects the mixer speed requirements.

Foam is checked for bubble uniformity, stability and flow pattern. If the bubble uniformity, stability, and flow pattern are not the desired standard values, the flow rate, mixing rate, blow ratio, and/or the chemical composition of the solution/dispersion may be adjusted prior to directing the foam to the applicator 24.

In one aspect of the invention, the foam target HYPOD 8510 ^® or other chemicals used in the creping is mixed and added to the chemical tank 12. In dilute solutions of HYPOD 8510 ^® (<10% total solids) and chemicals that are difficult to foam, it is usually necessary to add something to the composition to increase its viscosity and foaming capabilities. For example, hydroxypropyl cellulose or other blowing agents or surfactants can be used to create a stable foam for uniform application of the dryer surface onto the heated impermeable surface of the rotating drum. Reinforcing ingredients such as silica gel particles or cotton linter flocs are added to the additive composition before the additive composition is pumped into the foaming machine, or after the additive composition has flowed out of the foaming machine, but the foamed additive composition is applied onto the surface of the dryer. It can be added to the additive composition in a variety of ways, including, but not limited to, introduced into the foamed additive composition prior to being introduced, or applied to a dryer prior to the substrate contacting the additive composition. When the enhancing component is introduced into the additive composition, it is necessary to stir the mixture constantly before adding the mixture into the foaming machine to prevent the solid enhancing component from sedimentation at the bottom of the container. When the enhancing component is introduced into the foamed additive composition, there is a need for a suitable device that ensures uniform mixing of the enhancing component and the foamed additive composition.

materials

Suitable base materials are beauty tissue, uncreped through air-dried tissue (UCTAD), paper towel, HYDROKNIT ^® nonwoven material from Kimberly Clark Corporation of Nina, Wisconsin, USA, wet batch web, airlaid. Webs, spunbond webs, meltblown webs, coform webs, bonded carded webs (BCW), continuous films, spunlaces, film/laminate sheets, hydroentangled webs, and all types of paper, tissue, and other nonwovens Including, but not limited to, products.

In the non-limiting examples described herein, the foamed chemical agent can be applied to a nonwoven fabric such as a tissue. As used herein, nonwoven is meant to include beauty tissues, toilet paper, paper towels, spunbond, diapers or feminine body side liners and outer covers, napkins (for hands and face, etc.), and the like. Tissues include, but are not limited to, conventional felt-pressured tissue paper, high bulk pattern densified tissue paper, and high bulk, uncompacted tissue paper. It can be formed in a variety of ways. The tissue paper product produced therefrom may have a single or multi-ply configuration such as that of US Patent Publication No. 2008/0135195. Another embodiment for forming the tissue of the present invention uses a papermaking technique known as uncreped through-air dried (UCTAD). Examples of such techniques include U.S. Patent No. 5,048,589 to Cook et al., U.S. Patent No. 5,399,412 to Sudall et al., U.S. Patent No. 5,510,001 to Hermans et al., U.S. Pat. It is disclosed in the issue.

Surface coating process

Unlike the process of spraying the diluted dispersion or solution onto a dryer surface, such as a Yankee dryer surface 23 (or other suitable dryer drum surface (not shown)), the process of the present invention is applied onto the dryer surface 23. Solid foaming chemistries can be applied. In the present invention, air is used to dilute the benefit agent containing any level of solids, and the viscosity is within the range that can be pumped by the foam forming machine. For example, up to about 65% solids, up to about 50% solids, up to about 35% solids, or up to about 20% solids.

The high-solids coating process of the present invention provides a more ductile surface due to the inherent microstructure of the collapsed foam film layer, less chemical consumption due to the close direct application of the foamed chemical, and of the chemical agent to water. Due to the high proportions (e.g., ^{chemicals such as HYPOD 8510 ®} , become unstable when exposed to large amounts of hard water, i.e., solids levels below 1%), there is no need to use soft or deionized water, and It may indicate that the drying energy required to dry the chemical agent and the base sheet is low, but is not limited to these advantages. Additional benefits due to the addition of the reinforcing component include the uniformity of the overall benefit agent film coating on the nonwoven substrate, improved adhesion of the overall benefit agent to the nonwoven substrate, improved mechanical strength of the overall benefit agent coating film, and the dryer from the foam generator unit. Improved stability of the benefit agent foam to the surface, but is not limited thereto.

The foamed benefit agent can be applied onto the substrate 27 in two ways: in-line application or off-line application. In the in-line application process, the foam generator and applicator are integrated into the tissue making, and the foamed chemistry is applied on any substrate during its preparation. Off-line application makes it possible to apply foam chemistries to these substrates produced by an uncraping process. For example, uncraping, air-dried ("UCTAD") toilet paper and meltspun nonwoven materials are suitable for use in off-line application methods.

Referring to FIG. 1, in one aspect of the present invention, the foamed chemical is applied to the dryer surface 23 via an applicator 24. The foam applicator 24 is placed close to the dryer surface (0.64 cm or 1/4 inch) for uniform foam distribution onto the dryer surface 23. This positioning makes it possible, in particular during high-speed operation, that the foamed chemicals make better direct contact with the dryer surface 23.

It is most preferred to use a single parabolic applicator 24 to apply the chemical to the rotary dryer drum surface 23. However, if variable levels of chemical application across the width of the dryer surface are required due to dryer or basesheet variability, an applicator (not shown) with multiple zones of a small parabolic applicator can be used. .

In general, the enhancement component allows the additive composition coating (ie, the ocean layer) to exhibit a novel and improved tactile feel. For example, HYPOD 8510 ^® is, may be used as an additive composition, the foam enhancement is coated / surface of a substrate without the component. When the surface is in contact, this provides a significant ductility improvement over the same tissue with conventional creping chemistries. However, at the same time, it also has a slight waxy or slippery feel. Some types of consumers may like this slippery feel, while others may not want it. By adding the enhancing component, this feeling can be changed without impairing the ductility improvement. The hand feel obtained through this method includes, but is not limited to, a cotton feel, a softness, a fluffy feel, and/or a hairy feel. Another advantage of adding the reinforcing component(s) is that the additive composition HYPOD 8510 ^® coating layer has improved strength, which is important when the benefit agent is applied on a pre-prepared substrate such as a thermoplastic non-woven fabric. This improved strength allows the coated film of the benefit agent to have uniform and complete coverage on the substrate.

In addition, it can be seen that surface properties such as water absorption, friction, and bulk can be improved by using the enhancement component and the application method. In addition, other surface advantages such as better scent, antimicrobial properties, humidification properties, sooting aids, etc. than can be provided by the additive composition HYPOD 8510 ^{® alone can be applied.} HYPOD 8510 ^® and polyvinylpyrrolidone-based, including both the styrene, than using any enhancer ingredients without HYPOD ^® 8510 by almost 1.5 log Eau was observed to be (significantly) ductility.

^{Applicants have found that according to the IHR results for HYPOD 8510 ®} foamed substrates with 6% silica gel particles as reinforcing component, the best ductility is perceived as greater than 5 log odds deviation from non-foamed substrates with conventional creping chemistries. I did. ^{The HYPOD 8510 ®} foam control without any enhancement component was adjacent to a log odd difference greater than 4. All other foamed substrates were recognized to be at least 3 log odds softer than the control non-foamed substrate.

Another advantage of adding a reinforcing component is the enormous caliper increase that can be achieved while having or generally retaining this strength than a non-foamed surface treated substrate. These substrates were all calendered at the same nip pressure for the facial conversion process. The percentages listed adjacent to the data points are the amount of enhancement component added based on ^{HYPOD 8510 ® dry weight in the composition prior to foaming.} It was found that the foamed and creped substrates exhibited an additional increase in bulk over the unfoamed and creped substrates, with the highest level increase being nearly 35%. Most of the substrate having the reinforcing component is, the bulk was increased compared to the foam substrate containing only HYPOD 8510 ^®. All processing conditions such as blade type, bevel, and pressure load were the same.

Creping process

Creping is a part of the substrate manufacturing process in which the substrate is peeled from the surface of a dryer (eg, Yankee dryer) rotating by a blade assembly. Creping can be done as described in US Patent Application No. 13/330440 to Qin et al. filed on December 19, 2011.

Other beneficial factors

The benefit agents of the present invention can be used to provide a variety of advantages that can be used to coat a substrate and to provide the aforementioned advantages. There are also other advantages provided by the present invention, which can be explicitly claimed and explained in accordance with the following.

Improved printing

As described herein, an inherent advantage provided by the present invention is that it can improve the printing ability on a nonwoven substrate. The additive composition may be applied to essentially form a film-like surface on the substrate so that the printing is more consistent and in some cases sharper. For example, spunbonds are admitted for a tactile feel or feel like clothing, but tend to diffuse or absorb the ink to reduce the ink coverage visible on the substrate, so when it comes to printing, it's over film stacks. Not the preferred description. Of course, the film laminate is optimal for printing graphics, but it is not optimal as a substrate that will come close to the skin. Prior to the present invention, a solution for printing on a nonwoven substrate was to adhesively laminate a printing film to the substrate. While this worked, it could increase the manufacturing process and cost. Accordingly, the present invention provides a unique compromise that also provides a surface capable of improving the printing ability on the substrate without removing the tactile sensation or feel of the substrate as in clothing. The present invention provides a fairly smooth surface that eliminates the pixelated appearance of the current outer cover material. In addition, ink adhesion is improved. The substrates of the present invention have improved ink coverage of at least about 25%, at least about 50%, or at least about 75% over untreated substrates. The present invention provides an improved surface area such that a larger portion of the substrate is covered by the printed ink and thus the printing clarity or appearance on the substrate can be improved compared to the untreated substrate. Current surface printing of outer cover stacks requires the use of specific inks to avoid potential issues with ink rub off. The present invention can use any commercially available ink used to print onto a substrate. Also, any conventional techniques useful for printing can be used within the present invention. These techniques may include, but are not limited to, gravure coating, offset printing, screen printing, flexography, inkjet printing, laser printing, digital printing, and the like. The dispersion of the present invention provides polar moieties that are expected to improve ink adhesion and thus direct printing on nonwoven substrates.

Fig. 2 shows the untreated spunbond printed with ink (the large white blotches are the ink printed on the fibers of the spunbond). In comparison, Figure 3 shows a spunbond substrate treated with an ink and treated with the benefit agent of the present invention. It can be seen that the treated sample (Fig. 3) has a film-like coating, which provides a larger area for the ink to cover the surface, improving the visual aesthetics in terms of print clarity and vibrancy. In FIG. 2, only about 20% of the surface was covered by ink in the untreated spunbond, while FIG. 3 shows 50% ink coverage of the spunbond treated according to the present invention. This data was obtained by quantifying SEM images using image analysis software. The ink can adhere more consistently and smoothly on the treated substrate, thus improving the overall appearance of the printing.

Improved bulk and elongation

In addition to improving the overall tactile feel of the nonwoven substrate, the present invention may increase both bulk and basis weight compared to the untreated substrate. The bulk is not limited in theory and may be proportional to the basis weight of the fibers in the substrate of the present invention. As the basis weight increases, corrugation of the fibers may expand the caliper of the fibers in the Z direction and thus expand the bulk of the fibers. The fibers will be lofted, thus increasing the bulk of the fibers. The benefit agents of the present invention, alone or in combination with certain creping mechanisms within the present invention, may contribute to the above-described bulk increase and basis weight increase. For example, but not limited to, compared to an untreated spunbond substrate having a basis weight of 12 gsm and a bulk of 13 cc/g, the present invention has a basis weight of 16 gsm and a bulk of 27 cc/g (i.e., 33% and 108% increase, respectively. Spunbond) can be verified. Likewise, the creping mechanism and process can demonstrate even greater benefits and demonstrate a spunbond with a basis weight of 25 gsm and a bulk of 25 cc/g (i.e., an increase of 108% and 92% respectively). For example, the present invention enables nonwoven materials having a cellulose content, with a basis weight increase of at least about 20% to more than about 250% compared to an untreated substrate. For example, untreated cellulose substrates are known to have a basis weight of about 56 gsm and a hysteresis of 84%. However, the nonwoven cellulose substrate of the present invention can demonstrate a basis weight of about 95 gsm (an increase of about 70% of the basis weight) and a hysteresis of about 74%. In addition to the benefit agents such ^{as the foamed HYPOD 8510 ®} dispersion used in the present invention, ^{a second component such as a nonionic surfactant such as Lutensol ®} can further aid in the success of increasing the bulk of the substrate of the present invention. Lutensol ^® also consists of a few moles of ethylene oxide adducts of linear lauryl myristyl alcohol, which can also be readily biodegradable. In addition, by using a nonionic surfactant such as ^{Lutensol ®} , the present invention can be used at a low adduct level while uniformly diffusing a foamed benefit agent such as ^{HYPOD 8510 ® dispersion over the entire area of the substrate.} However, the present invention can increase the bulk or without addition of up to about 50% of non-ionic surfactants such as Lutensol ^® or those added. For example, a foamed benefit agent, e.g., about 500 mg/m ^{2 of a HYPOD 8510 ®} dispersion, may be combined with ^{about 250 mg/m 2} of a nonionic surfactant such as ^{Lutensol ®} in some embodiments of the present invention. (I.e., the ratio of nonionic surfactant to benefit agent is about 1:2).

As used herein, the "hysteresis" value of a sample can be determined by first stretching the sample to a desired elongation and then controlling the sample to shrink at the same rate. The hysteresis value is the reduction or loss of energy during this cyclic loading. Percent hysteresis is calculated by integrating the area under the loading (A _L ) and unloading curves (A _UL ), obtaining the difference between them, and dividing by the area under the loading curve. That is,% Hysteresis = (A _L -A _UL )*100/(A _L ). These measurements are performed using the "strip elongation test" substantially conforming to the specifications of ASTM D5035-95. Specifically, the test uses two clamps, each clamp having two jaws, and each tooth has a facing in contact with the sample. The clamps hold the same sided material generally vertical, separated by 3 inches, and move the crosshead at a specific rate of expansion. The sample size is 3 inches by 6 inches, the height of the tooth face is 1 inch, the width is 3 inches, and the cruising speed is 10 inches/minute. The specimen is clamped in an MTS (Mechanical Test System) electromagnetic test frame with data acquisition capability. The test is carried out in ambient conditions in both the cross direction (CD) and machine direction (MD). Results are reported as the mean of at least five samples.

Fig. 4 is not limited to the data shown, and provides an example of the present invention, the foamed and creped types using hydroknit as a substrate, about 22% at an applied strain of about 100% before showing any fracture. To about 25% elastic strain. Relatively, the control hydroknit has only about 15% elastic strain and breaks at about 25% applied strain. Similarly, the foam type and creping type of the present invention using spunbond as a base material, without being limited to the data shown in FIG. 5, are compared with the control, which extends from about 50% elongation to a maximum of about 18% elastic deformation before fracture. It has an elastic strain of about 27% to about 55% at about 100% elongation. 7 shows the machine direction (MD) elastic stretching (return) versus applied stretching, without being limited to the data shown. The present invention shows an increase in elongation by the presence of a foamed HYPOD 8510 ^{® dispersion bound with foamed Lutensol ®} on a tissue substrate. The present invention only exhibits an astonishing elastic elongation of about 30% at an applied strain of about 80%, while only showing an elastic elongation of less than about 8% at an applied strain of about 18% in a basic cellulose tissue. 8 shows a comparison of cross-direction (CD) strain versus applied strain of an untreated tissue substrate versus an inventive tissue, without being limited to the data shown. As shown, the invention, using the foam-type as a first advantageous HYPOD 8510 ^® dispersion combined with Lutensol ^® on the tissue substrate, and has the largest elastic stretching up than the basic cellulose tissue to rupture.

Thus, untreated nonwoven substrates can demonstrate elongation at break or elongation, but generally at a faster stage of elongation. In general, conventional untreated substrates can demonstrate elongation at break of about 8% to about 45%. However, the present invention enables substrates to be treated to demonstrate elongation at break greater than about 45%, as described herein. For example, the present invention can demonstrate elongation at break of about 45% or about 47% to about 55%, about 80%, about 280%, about 337%, or about 350%. In particular, for some substrates that generally have a low elongation at break, the present invention can provide an elongation at break of about 25%, about 30%, about 35%, about 38%, about 45%, or about 47%. This elongation can be specifically exemplified in the tissue substrate according to the present invention.

The nonwoven substrates of the present invention, likewise, compared to an untreated substrate, at least about 5%, at least about 20%, at least about 30%, at least about 40%, at least about 50%, at least about 60%, at least about 70%, or It shows a reduction in hysteresis of at least about 100%. In addition, the nonwoven substrate of the present invention is at least about 20%, at least about 25%, at least about 50%, at least about 70%, at least about 80 compared to the untreated substrate as determined by the bulk test described herein. %, at least about 90%, at least about 100%, at least about 110%, at least about 125%, at least about 200%, at least about 225%, or at least about 250%.

The present invention also increases the bulk and / or elasticity of the substrate regardless of the presence of Lutensol ^®, can prove the bulk and / or elastic foam only type HYPOD 8510 ^® dispersion. Without limitation, untreated hydroknit substrates can demonstrate hysteresis of about 87% and elongation at break of about 25%. However, the hydroknit substrate of the present invention can demonstrate about 67% hysteresis and about 337% elongation at break. Likewise, an untreated spunbond substrate can demonstrate a hysteresis of 100% and an elongation at break of about 45%, while the spunbond substrate of the present invention can demonstrate a hysteresis of about 40% and an elongation at break of about 280%. Thus, the present invention provides improved versatility by not only allowing substrates that generally do not provide elasticity to be stretched, but also allowing them to easily return and exceed the normal predictive properties of similar substrates not treated by the present invention. do.

A material with a greater elastic deformation has a greater elasticity or elastic energy. Substrates of the present invention may demonstrate an increased ability to withstand elongation of at least about 25%, at least about 50%, at least about 75%, or at least about 100% of applied strain compared to an untreated substrate. While various substrates may vary, it is clear that in the present invention, it is possible to improve elongation compared to a substrate that has not been treated accordingly. For example, untreated hydroknit can withstand about 15% elongation with about 25% applied strain. At an applied strain of about 50%, the same untreated hydroknit cannot maintain elongation without breaking. The hydroknit of the present invention is about 12% elongation when applied strain of about 25%, about 18% elongation when applied strain of about 50%, about 21% elongation when applied strain of about 75%, and about 100%. When applied deformation, it can withstand about 23% of elongation. Likewise, the untreated spunbond can withstand about 10% elongation at about 25% applied strain and about 16% elongation at about 50% applied strain. However, at 75% applied strain, the same untreated spunbond cannot maintain elongation without breaking. However, the spunbond of the present invention is about 17% elongation when applied strain of about 25%, about 36% elongation when applied strain of about 50%, about 46% elongation when applied strain of about 75%, and about At 100% applied strain, it can withstand about 54% elongation.

Improved elongation with elastic shrinkage

Existing elastic film laminates, such as U.S. Patent No. 8287677 to Lake et al. issued on October 16, 2012, are included in personal hygiene products that use a non-elastic or extensible facing. As a result, the elastic film (this also corresponds to the case made of elastic filaments) can be expanded and then relaxed before lamination of the facing. As a result of film expansion/relaxation, elastic laminates tend to be bulky compared to conventional textile materials. In addition to increasing the bulk, the visible appearance of the elastic laminate is dictated by the bonding pattern used in the lamination. The visible effect is more dependent on the peaks and valleys that are continuously bundled. Wrinkles are commonly seen along the waistband and cuffs of disposable personal care products such as feminine products, incontinence products, and diapers, as are technically known, but are not limited to these examples. Consumer feedback indicates a strong desire for a material that is thin, capable of holding across visible and tactile aesthetics such as clothing. Thus, smoother elastic regions that look more like undergarments are more desirable with reduced or no wrinkles. In addition, elastic film laminates rely on inelastic facings to perceive clothing-like aesthetics (visible and tactile). Current approaches to improving the aesthetics of the facing of laminates rely on post-lamination treatment (eg groove rolling) or the use of high basis weight materials (bonded carded webs, which are not particularly cost effective). Thus, the extensible, relatively low basis weight, and bulk-providing facing material conveys a more apparel-like appearance and tactile sensation, and has a film stack that mimics conventional textiles, i.e., looks more like an undergarment. Provides an excellent opportunity to do. The present invention provides such a solution by providing a creped nonwoven substrate with improved drawability and increased bulk to yield an article, in particular to yield an elastic film laminate for articles with or without wrinkles. The non-woven substrate is at least about %5, at least about 10%, at least about the elimination of wrinkles (100% reduction in wrinkles), or at least about 5%, at least about 10%, compared to the untreated substrate, compared to an elastic film not previously stretched to produce the elastic laminate of the present invention. A reduction in wrinkles of at least 25% or at least about 50% can be demonstrated at least. Creping facings can also be used in workwear and healthcare apparel (especially the body side of the apparel) to further enhance apparel-like texture and soft perception for an improved visible and tactile feel. Creping can also provide an opportunity for improved moisture wicking, depending on the nonwoven substrate used as the facing.

Therefore, in addition to the above-described ductility and bulk improvement improvements, the present invention enables creping of nonwoven substrates such as spunbond, bonded carded web, spunlace, etc., thereby increasing the bulk and improving tactile and Improved structures such as visible aesthetics can be developed. Because the present invention delivers a collapsed foam film benefit agent layer on the nonwoven substrate, it helps the nonwoven maintain an advantageous creping structure during the lamination process. Structural evaluation of the nonwoven material using the present invention, for example spunbond, shows that the benefit agent layer coating is essentially retained on one side of the nonwoven material, in particular on the surface of the nonwoven material. The benefit agent of the present invention is mainly concentrated on the peaks of the creping material, which may coincide with the junction of the nonwoven material. Creping nonwovens have machine-direction elongation (with a certain level of reversion) and a more apparel-like visual aesthetic, because the appearance of the joints (if any) on the nonwoven material is minimized to reduce wrinkles. to be. When laminated to an elastic film/filament (without the need to pre-stretch the elastomer), the result is a disposable personal hygiene product that looks and feels like an undergarment, but provides the product with protection and manageable hygiene quality. Eh, it is a laminated web that can be integrated. While not limited to these articles, this may be particularly desirable for disposable incontinence articles where adults desire less diaper-looking products that crease at the waist and legs to wear products that are more cautious in wearing and feeling.

The ability to crepe the expandable and retractable nonwoven material facing was adjusted to produce an elastic laminate that was not pre-stretched (no or less wrinkles). In order to produce a layered product, it creped non-woven material (spunbond material beneficial agent laminate containing HYPOD ^® 8510) of the present invention are, for example, using an adhesive was laminated on one side or both sides of the elastic film. As a result, the benefit agent can be deposited on the side of the creping substrate that is attached to the film to provide a tactile and visual indication of the laminate, which is a material that is larger in bulk and looks like a garment. As the film layer is not stretched and does not shrink, the basis weight of the film can be adjusted to suit physical property requirements rather than process requirements. The present invention provides a creped nonwoven fabric substrate made from a variety of raw materials. In particular, it relates to nonwoven fabrics made from polypropylene, polyamide, polyester, polyethylene, propylene/ethylene copolymers, and other polyolefin blends. Further, by controlling the degree of creping, it is possible to provide varying degrees of MD elongation enabling elastic laminates with varying amounts of stretching/returning.

In addition, the use of the creping substrate of the present invention provides an opportunity to improve the visible and tactile aesthetics of elastic film laminates, such as those used as outer cover materials for personal care products such as feminine products, incontinence products, and diapers. However, it is not limited to these examples. The adhesive lamination of the creping facing provides a large, apparel-looking appearance and tactile feel without the need to use a high basis weight material.

The present invention shows improvements not found in substrates that have not been treated by the means provided by the present invention. As described above, the improvements of the present invention compared to the untreated substrate include improved tactile feel such as ductility, improved printing, decreased hysteresis, increased bulk, increased elasticity/extensibility, increased shrinkage, decreased wrinkles, and these It can be selected from a combination of.

Other additives

The nonwoven substrate of the present invention may have additional compositions added to provide additional advantages in addition to the aforementioned advantages such as ductility, print enhancement, elasticity, bulk, etc. The composition can be added to the benefit agent-treated substrate to aid in the overall substrate performance. Specifically, for products such as personal care products, the additional composition may contribute to the performance or the user experience for the overall product.

Body fluid fluidity improver

An advantage of providing a body fluid flow modifier is that it assists the nonwoven substrate of the present invention in handling fluids containing blood components, such as feminine hygiene products and wound bandages, but is not limited to these examples. Body fluid fluidity improving agents include, but are not limited to, mucolytic agents, mucus improving agents, red blood cell improving agents, and the like. Body fluid flow modifiers of the present invention include various compositions or medicaments capable of interacting with body fluids to better assist body fluid interaction with the substrate. For example, mucolytic agents are known to break down intramolecular and/or intermolecular bonds, and thus significantly reduce the viscoelasticity of mucus, which is the mucus component of the menstrual fluid or the critical disulfide of mucous glycol-proteins. . Such drugs are disclosed in U.S. Patent No.7687681 to DiLuccio et al. issued on March 30, 2010, and are useful herein. In addition, mucolytic agents can improve mucus by cleaving the protein backbone, improving the 3D structure, and reducing entanglement in the structure of the mucus. This is U.S. Patent No. 8044255 to Potts et al., issued on October 25, 2011, U.S. Patent No. 6060636 to Yahiaoui et al., issued on May 9, 2000, and U.S. Patents such as Dibb, issued on April 19, 2011. As the respectively further disclosed in No. 7,928,282, it comprises a carbohydrate of enzymes, and the like dextran (dextran), such as a nonionic surfactant, papain (papain), such as such as Lutenzol ^®. The mucolytic agents of the present invention include, but are not limited to, L-cysteine, thioglycolate, dithiotriacol, and combinations thereof. Body fluid flow modifiers may be used within the present invention in an amount of about 0.1% or about 0.2% to about 5% or about 20% or based on the weight of the benefit agent composition.

In some substrates, the nonwoven material may exhibit pore barrier properties caused by red blood cells, and as a result, the fluid suction and wicking ability of the substrate may be reduced. In addition, there may be red blood cell modifiers that not only reduce pore blocking properties, but also reduce viscosity. This includes those disclosed in U.S. Patent No. 6,350,711 issued to Potts, such as the Glucopon 220 ^®, PLURONIC ^®, and February 26, 2002, but is not limited to this. Further, the substrate is used to capture body fluids including red blood cells, but is not limited to these examples, and increased leakage may occur due to hole blocking. Thus, by adding such a composition to the nonwoven substrate of the present invention, the end-user experience can be improved, resulting in an advantageous substrate product.

Anti-adhesive

An anti-adhesion agent may be added to prevent viscoelastic fluids such as menstrual secretions and feces from adhering to the skin. The anti-adhesion agent may include at least one viscoelastic material, at least one anti-adhesion material, or a combination thereof, and may be added to the nonwoven fabric substrate of the present invention. The anti-adhesion agent is disclosed in U.S. Patent No.7642396 to Schroeder et al. issued on January 5, 2010. In particular, the anti-adhesion agent functions to prevent menstrual secretions and/or fecal material from adhering to the skin in the labia and perianal regions, respectively, during and after menstruation or defecation. Suitable viscoelastic materials include, but are not limited to, linked enzymes, alkyl polyglycosides having 8 to 10 carbon atoms in the alkyl chain, bobbin lipid extraction surfactants, dextran, dextran derivatives, and combinations thereof. . Suitable anti-adhesion compounds of the present invention are alginic acid, beta-benzal-butyric acid, plants, casein, farnesol, flavones, fucans, galactolipid, kininogen, hyaluronate, inulin, iridoide glycoside, nanoparticle , Perecan, phosphorothioate oligodeoxynucleotide, poloxamer 407, polymethylmethacrylate, silicone, sulfated exopolysaccharide, tetrachlorodecaoxide, and combinations thereof. Does not. The anti-adhesion agent may be added to the nonwoven substrate of the present invention in an amount of about 0.01% to about 25% by weight of a viscoelastic material or an anti-adhesion material. Another variable amount is an amount from about 0.05% to about 10%, or from about 0.1% to about 8%, or from about 0.1% to about 5% by weight of the viscoelastic material or anti-adhesion material.

Odor control material

Any of a variety of malodor control substances capable of imparting malodor control to the nonwoven substrate can be used in accordance with the present invention. Using such malodor control is particularly useful in personal hygiene absorbent articles. For example, odor control substances, as disclosed in U.S. Patent No. 5342333 to Tanzer et al. issued on August 30, 1994 or U.S. Patent No. 5364380 to Tanzer et al. issued on November 15, 1994. , Anhydrous mixture of basic, pH neutral, and acidic malodor absorbing articles. In addition, suitable odor control substances of the present invention, as disclosed in U.S. Patent Application No. 2008249490 filed on October 9, 2008, by action on odor substances in a substrate (such as an absorbent article) or It may include a malodor control system for reducing the malodor by reducing the malodor by the action on the user's nose receptor. In addition, other odor control substances of the present invention provide extended odor control by concentrating on highly volatile substances such as those disclosed in US Patent Application No. 2008071238 to Sierri et al. filed on March 26, 2008. It may include an odor control system. Odor control substances are further disclosed in U.S. Patent No.8066956 to Do et al., issued on November 29, 2011, and U.S. Patent No.6926862 to Fontenot et al., issued on August 9, 2005. Other odor control substances of the present invention include ammonia neutralizing agent, functional flavor, chelating agent, silica, alumina, zirconia, magnesium oxide, titanium dioxide, iron oxide, zinc oxide, copper oxide, baking soda (sodium bicarbonate), activated carbon, diatomaceous earth. , Zeolite, and inorganic oxide particles such as clay (eg, green clay), and combinations thereof, but are not limited thereto. The malodor control material may be present from about 2 gsm to about 80 gsm, from about 8 gsm to about 40 gsm, or from about 12 gsm to about 30 gsm, depending on the basis weight of the nonwoven substrate.

Example

The following examples further illustrate and demonstrate embodiments within the scope of the present invention. The embodiments are disclosed for purposes of illustration only, and should not be understood as limiting the present invention, and thus various modifications thereof are possible without departing from the spirit and scope of the present invention.

The commercial HYPOD ^® dispersion was diluted to 30% HYPOD ^® solids level in water and then foamed by a Gaston unit. A stable foam was applied to the hot drum surface of a 60 inch calender dryer. The cured HYPOD ^® dispersion was creped from the dryer face. The spunbond base sheet was creped using the foaming process of the present invention as described herein. Subsequently, the HYPOD ^® coated base sheet was printed with cyan ink, at which time, 100 parts by weight of the ink was mixed with 4.5 parts by weight of a cross-linker. Samples were hand-printed using a 10.8 bcm (billion cubic microns) anilox roller.

Foaming process conditions:

% Solids in dispersion: 10 30% HYPOD8510 ^®

Dryer temperature: 260-300deg F

Dispersion flow rate: 100-500 cc/min

Mixer speed: 20%-60%

Blow rate: 5-30

Image analysis was performed on the SEM images to quantify the surface ink coverage for both the untreated spunbond and the spunbond treated with the benefit agent of the present invention. The treated samples showed higher% surface ink coverage than untreated spunbond, as shown in Table 1.

materials % Ink coverage Spunbond Control A (8gsm) 14.00 Spunbond Control B (12gsm) 17.00 Foamed spunbond (8gsm) 61.00

Commercial HYPOD 8510 ^® polyolefin dispersions were diluted in water to variable HYPOD 8510 solids levels with no or up to 50% addition of Lutensol ^® A 65 N ICONOL ^{® 24 7 based on HYPOD 8510 ® solids.} Subsequently, these chemicals were foamed by a Gaston Systems foaming unit, and a stable foam was applied to the hot surface of a 60-inch dryer. The basesheet was then pressed onto the collapsed foam coated dryer surface, the dried paper surface was creped, and wound onto a reel drum.

The base sheet, i.e., a cellulosic towel, hydroknit ^®, using a spun-bonded, gave the stretched material by a process of controlling the creping blade geometry and / or the stretch ratio.

Foaming process conditions:

% Solids in dispersion: 5% 30% HYPOD 8510 ^®

Dryer temperature: 230-300deg F

Dispersion flow rate: 50-500 cc/min

Mixer speed: 20%-60%

Blow rate: 5-30

Mechanical Test-% Hysteresis:

The test was performed using the MTS tensile tester model,% # Insight Model EL1. A 3" inch wide specimen was pulled to 20% strain at a rate of 10 in/min and then contracted to 0% strain at the same rate. As shown in Tables 2 and 3, the area under the loading curve and the unloading curve was% Measured as hysteresis In addition, Table 3 shows the elongation at break for each of the tested substrates.

% Hysteresis for creped cellulose towels Basis weight (gsm) % Hysteresis Average Standard Deviation Control 56 84 ±0.6 Foamed cellulose 95 74 ±0.7

% Hysteresis for creping spunbond and hydroknit and cellulose cosmetic tissue Hysteresis% Elongation at break% Control Hydroknit 87 25 Foamed Hydroknit A 70 153 Foamed Hydroknit B 66 337 Control spunbond 100 45 Foamed Spunbond A 42 124 Foamed Spunbond B 40 280 Control beauty tissue 95 29 Foamed beauty tissue 65 47

Mechanical test: elastic energy

The test was performed using # Insight Model EL1, an MTS tensile tester model. A 3" inch wide specimen was pulled through a number of cycle loading and unloading curves to increase the% strain (25, 50, 75, 100) by 10 in/min. As shown in Table 4, applied strain (for each cycle) ( The amount of permanent deformation was measured after each cycle according to in/in).

Elastic deformation at a given applied deformation Applied variation (in/in) 0.25 0.50 0.75 1.00 Control Hydroknit 0.15 0.00 0.00 0.00 Foamed Hydroknit A 0.12 0.18 0.21 0.23 Foamed Hydroknit B 0.10 0.17 0.22 0.25 Control spunbond 0.10 0.16 0.00 0.00 Foamed Spunbond A 0.16 0.28 0.30 0.28 Foamed Spunbond B 0.17 0.36 0.46 0.54 Control beauty tissue 0.06 0.00 0.00 0.00 Foamed beauty tissue 0.12 0.16 0.03 0.00

Bulk was measured by measuring the weight and thickness of the material to quantify the basis weight (gsm) and the bulk (cc/g). The results are as shown in Table 5.

Code number Basis weight (gsm) Bulk (cc/g) Control spunbond 12 13 Foamed Spunbond A 16 27 Foamed Spunbond B 25 25

Test method

(1) Tactile ranking test for tactile sensation (In-Hand Ranking Test) (IHR test):

The Tactile Grade Test (IHR) is a basic evaluation of the tactile feel of a fibrous web and evaluates properties such as ductility. This test is useful for obtaining a quick reading as to whether a process change can be detected humanly and/or affects ductile perception compared to a control. The deviation of the IHR ductility data between the processed web and the control web reflects the degree of ductility improvement.

Test participants are trained to provide more accurate assessments than the average untrained consumer can provide. Rating data generated for each sample code by the participant are analyzed using a proportional hazards regression model. This model computationally assumes that the participant proceeds through the grading process from most attributes to the least attributes. The results of the ductility test are presented as log odds values. The log odds are the natural logarithm of the risk ratio estimated for each code from the proportional risk regression model. Larger log odds indicate that the relevant attribute is perceived with a greater intensity.

Since the IHR results are expressed in log odds, the difference in improved ductility is actually much larger than what this data indicates. As an example, when the difference in IHR data is 1, it actually represents a tenfold (10 ¹ = 10) overall ductility or a 1,000% improvement over the control. In another example, if the difference is 0.2, this ^{represents an improvement of 1.58 times (10 0.2} = 1.58) or 58%.

Data from IHR may also be presented in a rank format. The data can be used to perform relative comparisons within tests, since generally the product's rating depends on the product being graded. Comparisons between tests can be made when at least one product is tested in both tests.

(2) bulk testing

The sheet bulk is calculated as the quotient of the sheet thickness of the adjusted fiber sheet expressed in microns divided by the adjusted basis weight expressed in gsm. As a result, sheet bulk is expressed in cubic centimeters per gram (cc/g). More specifically, the sheet caliper is TAPPI test method T402 "Standard Conditioning and Testing Atmosphere For Paper, Board, Pulp Handsheets and Related Products" with Note 3 for laminated sheets and T411 om-89 "Thickness ( caliper) of Paper, Paperboard, and Combined Board. The micrometer used to perform the T411 om-89 is an Emveco 200-A Tissue Caliper Tester available from Emveco, Inc. of Newburgh, Oregon. The micrometer has a load of 2 kilo-Pascals, a pressure application area of 2500 square millimeters, a pressure application diameter of 56.42 millimeters, a residence time of 3 seconds, and a descent rate of 0.8 millimeters per second.

(3) viscosity test

Viscosity is measured using a Brookfield Viscometer, model RVDV-II+, available from Brookfield Engineering Laboratories, Middleboro, MA. Measurements were made using either the spindle 4 or the spindle 6 at room temperature (23° C.), at 100 rpm, depending on the expected speed. Viscosity measurements were reported in centipoise.

(4) Amount of HYPOD 8510 ^® additive composition test

In one aspect of the invention, the HYPOD add-on is determined using acid digestion. The sample is wet ash with sulfuric acid and nitric acid concentrated enough to destroy the carbonaceous material and separate potassium ions from the cellulose matrix. Then, the potassium concentration is measured by atomic adsorption. The HYPOD 8510 ^® adduct is determined based on the potassium concentration of ^{HYPOD 8510 ®} on the sample to bulk ^{HYPOD 8510 ®} measurements from the control HYPOD 8510 ^® dispersion solution (LOTVB1955WC30, 3.53%).

(5) How to determine the content of the additive composition of the tissue

The sample was digested according to the EPA method (3010A). This method consists of decomposing a known amount of material with nitric acid in a block digester and bringing it to a known volume at the end of the digestion. do.

Analysis was performed on a flame atom adsorption spectrophotometer using the July 1986 EPA method 7610, which is a direct aspiration method using an air/acetylene flame. The instrument used was a VARIAN AA240FS marketed by Aligent Technologies, Santa Clara, CA.

Analysis was performed in the following manner: The instrument was calibrated with a blank and 5 standards. The calibration was followed by analysis of the second source standard for confirmation of the calibration standard. In this particular case, the return was 97% (90-110% was acceptable). The digestion blanks and digestion standards were then analyzed. In this particular case, the blank was less than 0.1 mg/l and the standard recovery was 93% (85-115% was acceptable). The samples were then analyzed and, after every 10th sample, the standard was run (90-110% is acceptable). At the end of the entire analysis, blanks and standards were run.

(6) Basis weight

A modified TAPPI T410 procedure was used to determine the basic basis weight of the tissue sheet specimen. Pre-stacked samples were adjusted to 23° C.±1° C. and 50±2% relative humidity for a minimum of 4 hours. After adjustment, 16-3" x 3" pre-overlapped samples were cut using a die press and an associated die. This represents a tissue sheet sample area of 144 in ² or 0.0929 m ^2. Examples of suitable die presses are TMI DGD die presses manufactured by Testing Machines, Inc., Iceland, NY, or Swing Beam test machines manufactured by USM Corporation, Wilmington, NY. Mass. Die size tolerance is +/-0.008 inch in both directions. The specimen stack was then weighed on a tared analytical balance to the nearest 0.001 gram. The basis weight in grams per square meter (gsm) is calculated using the following equation.

(Adjusted) basis weight = laminate weight gram/ (0.0929 m ² )

(7) Geometric Mean Tensile Strength (GMT)

The shape average tensile strength (GMT) is the square root of the product of the dry machine direction (MD) tensile strength multiplied by the dry machine transverse direction (CD) tensile strength, and is expressed as grams per 3 inches of sample width. MD tensile strength is the peak load per 3 inches of sample width when the sample is pulled to rupture in the machine direction. Likewise, the CD tensile strength is the peak load per 3 inches of sample width when the sample is pulled to rupture in the cross-machine direction. Tensile curves were obtained after the tissue samples were equilibrated to the test conditions for a period of less than four hours under laboratory conditions of 23.0°C±1.0°C and 50.0±2.0% relative humidity.

Samples for tensile strength testing were at least 5 inches (127 mm) in either machine direction (MD) or cross machine (CD) direction using a JDC Precision Sample Cutter (Thwing-Albert Instrument Company, Philadelphia, PA, model number SC130). ) Cut into strips of length x 3 inches wide (76 mm). The tensile test is measured on a MTS Systems Synergie 100 which is driven with TestWorks 4 ^® software version 4.08 (Eden Prairie, Minnesota, the material MTS Systems Corp.).

The load cell is chosen to be either a 50 Newton or a 100 Newton maximum depending on the strength of the sample being tested so that most of the peak load value falls between 10 and 90% of the full scale value of the load cell. The gauge length between the teeth is 4 +/- 0.04 inches (102 +/- 1 mm). The teeth are actuated using pneumatic action and coated with rubber. The minimum gripping surface width is 3 inches (76 mm), and the approximate height of the teeth is 0.5 inches (13 m). The crosshead speed is 10 +/- 0.4 inch/min (254+/- 10 mm/min), and the breaking sensitivity is set to 65%.

The sample is placed within the teeth of the instrument centered both vertically and horizontally. The test then starts and ends when the specimen breaks. The peak load is reported as either the “MD tensile strength” or “CD tensile strength” of the specimen, depending on the direction of the sample being tested. Ten (10) specimens per sample are tested in each direction, and the logarithmic average is reported as either the MD or CD tensile strength value of the product. The geometric mean tensile strength is calculated from the following equation:

GMT = (MD Tension * CD Tension) ^1/2

The dimensions and values disclosed herein are not to be understood as being strictly limited to the exact numerical values recited. Instead, unless otherwise specified, each such dimension is intended to mean both the recited value and a functionally equivalent range around this value. As an example, a dimension disclosed as “40 mm” is intended to mean “about 40 mm”.

All documents cited in the detailed description of the present invention are incorporated herein by reference in the relevant part, and citation of any document should not be construed as an admission that is prior art to the present invention. If any meaning or definition of a term described herein conflicts with any meaning or definition of a term in the documents incorporated by reference, the meaning or definition assigned to the term described herein takes precedence.

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

Claims (20)

A fibrous web defining a surface; And
A nonwoven substrate comprising a benefit agent layer, wherein the benefit agent is an additive composition;
The benefit agent is foamed and bonded to the fibrous web surface through a creping process, so that the additive composition forms a film-like surface on the substrate than the substrate;
The non-woven fabric substrate is printed, characterized in that showing improved printing compared to the untreated substrate, non-woven fabric substrate. The nonwoven substrate of claim 1, wherein the substrate exhibits a hysteresis reduction of at least 5%, a bulk increase of at least 40%, and combinations thereof compared to an untreated substrate. The method of claim 1, wherein the fibrous web is a tissue, breathable dry tissue, paper towel, hydroentangled web, spunbond, melt blown, coform, bonded carded web, airlaid, laminate, paper, and Which is selected from the group consisting of composite combinations, non-woven base material. The method of claim 1, wherein the additive composition is a polyolefin dispersion, a SEBS copolymer dispersion, a polyisoprene dispersion, a polybutadiene-styrene block copolymer dispersion, a latex dispersion, a polyvinyl pyrrolidone-styrene copolymer dispersion, and a polyvinyl alcohol-ethylene. A non-woven fabric substrate, which is a polymer dispersion selected from copolymer dispersions and combinations thereof. The nonwoven substrate of claim 1, wherein the benefit agent further comprises an enhancing component selected from microparticles, expandable microspheres, fibers, additional polymer dispersions, fragrances, antibacterial agents, humidifiers, drugs and soothers. The nonwoven fabric substrate according to claim 4, further comprising a reinforcing component added to the polymer dispersion in an amount of 0.5% to 30% based on the weight of the dispersion. The nonwoven fabric substrate of claim 1, wherein the additive composition is an insoluble polyolefin copolymer selected from ethylene-acrylic acid, polyethylene-octene copolymer, and combinations thereof. The method of claim 1, wherein the additive composition is selected from synthetic water-soluble polymers, natural water-soluble polymers, and mixtures thereof, or the additive composition is polyalcohol, polyamine, polyimine, polyamide, polycarboxylic acid, polyoxide. , Polyglycol, polyether, polyester, a synthetic water-soluble polymer selected from copolymers and mixtures thereof, or the additive composition is modified cellulose, modified starch, modified protein, chitosan, chitosan salt, carrageenan , Agar, gellan gum, guar gum, and a natural water-soluble polymer selected from combinations thereof. The method of claim 1, wherein the substrate has an improved ink coverage of at least 25% in improving the printed appearance on the substrate, or the substrate has a bulk increase of 20% to 250% as determined by bulk testing. , Non-woven base material. The non-woven fabric substrate of claim 4, wherein the nonionic surfactant is combined with the additive composition in a ratio of 1:2 (mg/m ^{2 ).} The nonwoven fabric substrate according to claim 1, wherein the substrate has an elastic deformation capable of maintaining an applied strain elongation of 25% to 100% before breaking, or the substrate exhibits an elongation at break of more than 45%. The nonwoven substrate of claim 1, wherein the substrate is combined with an elastic film that has not been previously stretched to produce an elastic laminate having a wrinkle reduction of 5% to 100%. The method of claim 1, further comprising 0.1% to 20% of a body fluid flowability improving agent based on the weight of the composition, or the body fluid flowability improving agent is selected from mucolytics, wherein the mucolytics are L-cysteine, thio Glycolate, dithiotriacol, and combinations thereof; Mucus improvers; Red blood cell improvers; And a nonwoven base material selected from combinations thereof. The method of claim 1, wherein at least one viscoelasticity selected from linked enzymes, alkyl polyglycosides having 8 to 10 carbon atoms in the alkyl chain, bobbin lipid extraction surfactants, dextran, dextran derivatives, and combinations thereof. matter; Alginic acid, beta-benzal-butyric acid, plants, casein, farnesol, flavones, fucans, galactolipids, kininogens, hyaluronates, inulins, iridoid glycosides, nanoparticles, ferrecans, phosphorothioate oligos At least one anti-adhesion compound selected from deoxynucleotide, poloxamer 407, polymethylmethacrylate, silicone, sulfated exopolysaccharide, tetrachlorodecaoxide, and combinations thereof; And, the non-woven substrate further comprises 0.01% to 25% of an anti-adhesive agent selected from a combination thereof. The non-woven fabric substrate of claim 1, further comprising a malodor control material of 2 gsm to 80 gsm. delete delete delete delete delete

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