CN102065911A - Absorbent article with absorbent polymer material, wetness indicator, and reduced migration of surfactant - Google Patents

Abstract

Disclosed is a disposable absorbent article comprising an absorbent core, a liquid-permeable topsheet, a liquid-impermeable backsheet, and a pair of elastically shrinkable cuffs, each of the cuffs Constructed of continuous hoop material and having upstanding hoop portions comprising one or more elastic members. Each elastically shrinkable cuff may be secured to the topsheet around the longitudinal edges of the topsheet by an adhesive assembly, wherein the upstanding cuff portions are laterally offset from the longitudinal edges of the absorbent core, and wherein one or more elastic members are located between the adhesive assemblies. outside of the piece.

Description

The absorbent article that contains the surfactant migration of absorbent polymeric material, Wetting indicator and minimizing

Invention field

The disclosure relates generally to absorbent article, more particularly relates to the disposable absorbent article that contains absorbent polymeric material, for example diaper.

Background of invention

Absorbent article such as disposable diaper, training pants and adult-incontinence underwear absorb and hold body exudates.They also are intended to prevent body exudates is dirty, moistening can contact with the wearer medicated clothing or such as other goods of bedding.Can drying regime or carry a urine state and worn a few hours such as the disposable absorbent article of disposable diaper.Therefore, make many effort and improved absorbent article stickiness and comfortableness to the wearer when drying and when completely or partially being loaded with liquid efflunent, kept the absorption and the accommodation function of goods simultaneously.

Some absorbent articles such as diaper comprise the assembly of absorbent polymeric material (for example absorbability particulate polymer material) as absorbent cores, and described assembly is swellable or gelling during moistening owing to absorb liquid at it.Non-woven fibrous structure also is generally used in the absorbent article, for example is used for top sheet materials or seals absorbent cores and structural intergrity is provided in the absorbent cores moistening or when dry as the core covering.Some natural fiber and multiple synthetic fibers have been used for these to be used, wherein the visible enhanced effectiveness of synthetic fibers.Synthetic fibers can have some advantage that exceeds natural fiber, the low flexural rigidity of the increased product flexibility that for example they had.Yet, utilize synthetic fibers can have some restriction.For example, synthetic fibers have the hydrophobic general character usually, but in using such as many absorbent articles of health product, wish that fibre structure is hydrophilic.Therefore, the non-woven fibrous structure such as the core covering can need to be endowed hydrophilic to obtain the improvement of its required function.

Give the hydrophilic a kind of method of non-woven fibrous structure and be surface with hydrophilic surfactant active's contact or coating non-woven structure.Because this coating does not always cause strong chemical bond between non-woven material and the surfactant, thus surfactant can absorbent article between the operating period during moistening by eluting or wash away.When this took place, the absorbent properties of non-woven structure can be influenced unfriendly, caused comprising the diaper or the loses in performance of other goods between the operating period of this type of fibre structure.In addition, if moving or be diffused into because of it by absorbent article, the surfactant that washes away has on the selecteed material of hydrophobicity barrier property, these hydrophobic materials can become hydrophilic, thereby further reduce the performance of goods owing to the forfeiture of its barrier property.

On the other hand, owing to can wear a few hours when these goods completely or partially are loaded with liquid efflunent such as the disposable absorbent article of disposable diaper, it will be helpful therefore passing on absorbent article whether still to be used to provide absorbefacient mechanism to the caregiver.For example, when dry can either the indicating article visual signal that again can indicating article when be loaded with liquid efflunent will be useful feature.

Summary of the invention

The disclosure provides a kind of disposable absorbent article that comprises base and absorbent cores, and it can solve one or more above-mentioned technical problems.In one aspect, base can comprise the top flat of fluid permeable and join the impermeable egative film of liquid on the top flat at least in part to.In addition, absorbent cores can be at least partially disposed between top flat and the egative film and can comprise absorbent polymeric material.In one aspect, disposable absorbent article or its any assembly also comprise hydrophilic non-woven, and described hydrophilic non-woven comprises a plurality of synthetic fibers (a plurality of surfactant-treated synthetic fibers) that surfactant was handled.On the other hand, disposable absorbent article also can comprise stable component, and described stable component reduces the surfactant loss of hydrophilic non-woven during moistening.Although can adopt multiple stable component, in one aspect, it is optional certainly to stablize component: i) at least a and associating nonvolatil basically hydrophilizing agent of hydrophilic non-woven; Or at least a nonvolatil basically water-repelling agent that is independent of described hydrophilic non-woven; Or i) with ii) combination.In addition, disposable absorbent article also can comprise the Wetting indicator that is arranged between absorbent cores and the egative film and keeps liquid to communicate with absorbent cores, and wherein said Wetting indicator comprises at least a response color-forming compositions, makes visible change takes place when moistening.

According to the disclosure, disposable absorbent article also can comprise at least a in the following assembly: a) and absorbent cores in abutting connection with and be arranged on core covering between top flat and the absorbent cores; B) and absorbent cores in abutting connection with and be arranged on dustproof covering between egative film and the absorbent cores; C) be arranged on acquisition system between top flat and the absorbent cores, or d) their any combination.

According to another aspect of the present disclosure, the method that the surfactant of synthetic fibers during moistening that provides surface of stability activating agent to handle loses, described method comprises: the disposable absorbent article that comprises hydrophilic non-woven a) is provided, and described non-woven material comprises the synthetic fibers that surfactant was handled; B) make combination of at least a nonvolatil basically hydrophilizing agent and hydrophilic non-woven or in other words association; And/or c) at least a nonvolatil basically water-repelling agent is deposited on the part that is independent of hydrophilic non-woven of disposable absorbent article.

These and other feature and advantage that the disclosure provided can be apparent by reading following detailed Description Of The Invention, accompanying drawing and claim.

Summary of drawings

Fig. 1 shows dimerization hydrophilizing agent and the associating possible aspect of synthetic fibers.

Fig. 2 is the plane graph according to the diaper of an aspect of the present disclosure.

Fig. 3 is the profile along the diaper shown in Figure 2 of the transversal 2-2 intercepting of Fig. 2.

Fig. 4 A and 4B show the absorbent article that changes the Wetting indicator of color when having moistening of the present disclosure, and wherein Fig. 4 A shows before the moistening and Fig. 4 B shows after the moistening.

Fig. 5 A and 5B show the absorbent article with Wetting indicator of the present disclosure, and wherein background graphics is a series of big and small bubbles, and described bubble becomes a series of raindrop and minute bubbles when moistening.

Fig. 6 A and 6B show the absorbent article with Wetting indicator of the present disclosure, and wherein the background graphics of big and small bubble becomes raindrop in the air pocket successively in moistening.

Detailed Description Of The Invention

" absorbent article " is meant the device that absorbs and hold body exudates, more particularly is meant to be close to or contiguous wearer's health is placed to absorb and to hold device by the various effluents of body excretes.Absorbent article can comprise diaper, training pants, adult-incontinence underwear, feminine hygiene article, breast pad, nursing pad, bib, wound dressing product etc.As used herein, term " body fluid " or " body exudates " include but not limited to urine, blood, vaginal discharge, milk, perspiration and feces.

" absorbent cores " is meant following structure, described structure is arranged on usually between the top flat of absorbent article and the egative film and is used to absorb and hold the liquid that is received by absorbent article, and can comprise one or more substrates, be arranged on one or more suprabasil absorbent polymeric materials and the thermoplastic compounds at least a portion of absorbent polymeric material and one or more substrates, described compositions is used for absorbent polymeric material is fixed on one or more substrates.In multiwalled absorbent cores, absorbent cores also can comprise cover layer.These one or more substrates and cover layer can comprise non-woven material.In addition, absorbent cores is substantially free of cellulose.Absorbent cores does not comprise acquisition system, top flat or the egative film of absorbent article.In certain embodiment, absorbent cores will be made up of described one or more substrates, absorbability polymeric material, thermoplastic compounds and optional cover layer basically.

" absorbent polymeric material ", " absorbent gelling material ", " AGM ", " superabsorbents " and " superabsorbent material " exchange use in this article, and are meant the cross-linked polymeric material that can absorb at least 5 times 0.9% saline solution of its weight when utilizing centrifugal reserve capacity test (Edana441.2-01) to measure.Term used herein " absorbability particulate polymer material " is meant to granular form so that can be at the absorbent polymeric material of drying regime current downflow.

" comprise " that reaching " comprising " is open-ended term, each all specifies the described thereafter for example existence of an assembly, but does not get rid of for example existence of element, step or assembly of further feature known in the art or disclosed herein.

" basically by ... form " the scope with theme (theme described in claim) of being used for the in this article material or the step that are limited to specified material or step and influence the fundamental sum novel characteristics of described theme indistinctively.

" disposable " uses with its its ordinary meaning, is meant the goods that a limited number of use incident in different durations (for example less than about 20 incidents, less than about 10 incidents, less than about 5 incidents, or less than about 2 incidents) is processed afterwards or abandon.

" diaper " is meant generally by baby and incontinent patients around the lower body dress so that around wearer's waist and shank and be particularly suitable for receiving and holding the absorbent article of urine and feces.As used herein, term " diaper " also comprises hereinafter defined " trousers ".

" fiber " and " long filament " is used interchangeably.

" hydrophilizing agent " can broadly be disclosed as to comprise and introduce substituent oligomer of hydrophilic or polymer " main chain " on it.In this respect, " oligomer " of this paper is meant to have the polymer molecule that is less than 10 repetitives, for example dimer, trimer, the tetramer etc., and this paper " polymer " is meant the molecule that has greater than 10 repetitives.Found multiple this type of reagent effectiveness as the decontamination chemical compound in the washing field.Method disclosed herein and goods can adopt this compounds in stable non-woven fibrous structure as herein described.This compounds is generally water miscible or water dispersible under typical service condition disclosed herein, described service condition is as in the fiber slurry that comprises the aqueous carrier medium; About 20 ℃ to about 90 ℃ operating condition; Use content by the weight of described fibre weight about 0.001% to about 20%; The hydrophilizing agent in the serosity and the weight ratio of hydrophobic fiber at about 0.0001: 1 to about 1: 1 scope.The other aspect of hydrophilizing agent can be present among the WO 07/123702 that announced on November 1st, 2007.

" non-woven material " serve as reasons orientation or arbitrary orientation fiber by friction and/or bonding and/or be bonded to or by wet grinding and felting one-tenth artificial, fleece or batt, do not comprise paper with by weave, weave, bunch become, yarn that loop bonding merges constraint or the product of long filament, do not consider whether stitched in addition.These fibers can have natural or synthetical source, and can be short fiber or continuous filament yarn or the fiber for forming on the spot.The diameter range of commercially available fiber be less than about 0.001mm to greater than about 0.2mm, and they have several different forms: short fiber (being called staple fibre or chopped strand), ultimate fibre (long filament or monofilament), non-twist continuous long strand (tow) and twist continuous long strand (yarn) continuously.Supatex fabric can form by many methods such as meltblown, spun-bond process, solvent spinning, electrostatic spinning and carded method.Basis weight of nonwoven fabrics is represented with gram every square metre (gsm) usually.

As used herein, " trousers " or " training pants " are meant the disposable garment with waist opening and leg opening for baby or adult wearer design.Stretching into leg opening and trousers are moved to by the lower limb with the wearer can be with trousers through on one's body the user around the appropriate location of wearer's lower body.Trousers can use any suitable method to come preform, and the bonding (for example, stitching, welding, binding agent, adhesive bonds, fastener etc.) that includes but not limited to utilize refastenable and/or not reproducible fastening bonds together the each several part of goods.Trousers can be along the preform Anywhere of this goods circumference (for example, side fastening, front waist fastened).Although used herein is term " trousers ", trousers are also referred to as " closed diapers ", " prefastened diapers ", " pull-on diaper ", " training pants " and " diaper pants " usually.Suitable trousers are disclosed in the following patent: JIUYUE in 1993 were authorized people's such as Hasse United States Patent (USP) 5,246,433 on the 21st; Authorized people's such as Buell United States Patent (USP) 5,569,234 on October 29th, 1996; JIUYUE in 2000 were authorized the United States Patent (USP) 6,120,487 of Ashton on the 19th; JIUYUE in 2000 were authorized people's such as Johnson United States Patent (USP) 6,120,489 on the 19th; Authorize people's such as Van Gompel United States Patent (USP) 4,940,464 July 10 nineteen ninety; Authorized people's such as Nomura United States Patent (USP) 5,092,861 on March 3rd, 1992; The name that is filed on June 13rd, 2002 is called the U.S. Patent Publication 2003/0233082A1 of " Highly Flexible And Low Deformation Fastening Device "; Authorized people's such as Kline United States Patent (USP) 5,897,545 on April 27th, 1999; JIUYUE in 1999 were authorized people's such as Kline United States Patent (USP) 5,957,908 on the 28th.

" nonvolatil basically " is meant that inorganic agent, additive or the conditioner discussed keep its effect in the most of the time in disposable absorbent article service life.For example, this term can be used for being described in disposable absorbent article at least about inorganic agent, additive or conditioner that the expectation effect was provided in 60% time in service life." nonvolatil basically " can be used for being described in disposable absorbent article at least about 70%, at least about 80%, at least about 90% or at least about inorganic agent, additive or conditioner that the expectation effect was provided in 95% time in service life.

(Thickness caliper) is used interchangeably in this article " thickness ".

In one aspect, the disclosure provides synthetic fibers that surface of stability activating agent handled to reduce the method for the surfactant loss during the moistening, and wherein said synthetic fibers provide in the hydrophilic non-woven of disposable absorbent article.In one aspect, fiber or the hydrophilic non-woven that comprises fiber can handle with at least a nonvolatil basically hydrophilizing agent, with described hydrophilizing agent combination or in other words associate, and makes its water-wet behavior continued during the moistening or after the moistening.In this method on the other hand, be independent of the hydrophilic non-woven that comprises the synthetic fibers that surfactant handled, at least a nonvolatil basically water-repelling agent can be added, applies or deposit on the part of disposable absorbent article, so that reduce that part of migration that is independent of hydrophilic non-woven to disposable absorbent article during moistening of any surfactant.Therefore, be not bound by theory, it is believed that if the surfactant that washes away moves or is diffused into because of it by absorbent article and have on the selecteed material of hydrophobic barrier property, these hydrophobic materials can become hydrophilic, thereby further reduce the performance of goods owing to the forfeiture of its barrier property.Therefore, make synthetic fibers that surfactant handled and the hydrophilic non-woven that comprises these fibers more permanently hydrophilic, and these aspects of hydrophobic performance that more permanently strengthen the part that is independent of hydrophilic non-woven of disposable absorbent article have constituted the method in the surfactant migration attenuation factor disclosed herein.

According to an aspect, the disclosure provides a kind of disposable absorbent article, and described disposable absorbent article comprises: a) base, described base comprise the top flat of fluid permeable and join the impermeable egative film of liquid on the top flat at least in part to; B) absorbent cores, described absorbent cores are at least partially disposed between top flat and the egative film and comprise absorbent polymeric material; Wherein said disposable absorbent article or its any assembly comprise hydrophilic non-woven, and described hydrophilic non-woven comprises a plurality of synthetic fibers that surfactant was handled; Described disposable absorbent article also comprises: c) be used to reduce the stable component of the surfactant loss of hydrophilic non-woven during moistening, described liptinite branch is selected from: i) at least a and associating nonvolatil basically hydrophilizing agent of hydrophilic non-woven; The ii) at least a nonvolatil basically water-repelling agent that is independent of hydrophilic non-woven, or iii) i) with ii) combination; And d) be arranged between absorbent cores and the egative film and the Wetting indicator that communicates with absorbent cores maintenance liquid, described Wetting indicator comprises at least a response color-forming compositions, makes visible change takes place when moistening.

In another aspect of the present disclosure, stable component generally can comprise or can be selected from following component: a) with the permanent associating hydrophilizing agent of non-woven material; B) hydrophobicity is stablized component; C) micro/nano-fibre non-woven material is stablized component; Or d) their any combination.In these stable components each is described hereinafter.Utilize diaper to show the use of these stable components and Wetting indicator as the example of disposable absorbent article.

Aspect of the surfactant loss of stablizing non-woven material, stable component can be nonvolatil basically hydrophilizing agent.For example, the synthetic fibers in the non-woven material can comprise polymer and hydrophilizing agent, and wherein said polymer and described hydrophilizing agent comprise associating each other complementary segment.Fig. 1 shows this situation, but is not intended to be limited to this.Fig. 1 show have dimerization " main chain " hydrophilizing agent 201, complementary segment 203 and with the art figure of the associating hydrophilic substituent 204 of the complementary segment of synthetic fibers 202 on molecular level, wherein n can be about 1 to about 15.

Without being limited by theory, according to the conjecture hydrophilizing agent can with one or more surface associations of hydrophobic synthetic fibre.Association between hydrophilizing agent and the synthetic fibers can be the durability association and it can make synthetic fibers show water-wet behavior, and the hydrophobic property that this and synthetic fibers itself show forms contrast.Hydrophobicity according to theory conjecture synthetic fibers itself generally can cause synthetic fibers to be reunited together during fleece preparation technology or in the fibre structure in addition.No matter which kind of reason has now found that the association of hydrophilizing agent and synthetic fibers can provide the dispersibility of synthetic fibers in fibre structure.For example, during the wet-laying paper technology, synthetic fibers can be dispersed in the fluid carrier, and described fluid carrier can promote that subsequently synthetic fibers are dispersed in the fibre structure.Natural fiber can randomly be present in the dispersion, because natural fiber can not disturb the association of hydrophilizing agent and synthetic fibers.Hydrophilizing agent can associate with natural fiber, yet this association will can not stop the association of hydrophilizing agent and synthetic fibers.

Hydrophilizing agent can comprise multiple charged anion or cationic substance and uncharged monomeric unit.Anionic polymer and cationic polymer can not only strengthen the deposition of synthetic fibers but also strengthen its wettability.The example that comprises the hydrophilizing agent of Cationic functional groups is disclosed in US 4,956, in 447.The structure of hydrophilizing agent can be straight chain, side chain or even star.Structure is adjustable to be applied to different fibers or yarn fabric type with charge distributing.

Hydrophilizing agent and synthetic fibers are associated.This coupling can be based on the physical characteristic of synthetic fibers and hydrophilizing agent.This type of physical characteristic can include but not limited to degree of crystallinity and molecular weight.Coupling between the physical characteristic of hydrophilizing agent and synthetic fibers can help the associating durability that forms between hydrophilizing agent and synthetic fibers.Find that can be durability based on the association of physical characteristic, wherein hydrophilizing agent can not wash away from synthetic fibers.Just in this point, hydrophilizing agent of the present disclosure can be different from exemplary surfactants.Bonding between synthetic fibers and the hydrophilizing agent can be durability, and synthetic fibers can show persistent wettability.

In one aspect, synthetic fibers can show less than about 72 ° average contact angle.Synthetic fibers can show less than about 72 ° average contact angle, and can keep below about 72 ° at the average contact angle of washing synthetic fibers after 10 minutes.Synthetic fibers can show average contact angle less than about 66 °, 63 °, 60 °, 55 ° or 50 ° after 10 minutes in washing.The synthetic fibers that show this type of average contact angle can associate with hydrophilizing agent.Bonding between synthetic fibers and the hydrophilizing agent can be durability, and can not wash off from synthetic fibers at fluid single infringement back hydrophilizing agent.On the other hand, surfactant can not form this type of durability bonding usually and can wash off from synthetic fibers after the infringement of fluid single.In addition, describe in detail as this paper, the fibre structure that comprises synthetic fibers and hydrophilizing agent can show lasting wettability, and the fibre structure that comprises synthetic fibers and surfactant may not can show lasting wettability.The melt temperature that can surpass hydrophilizing agent by the combination of heating hydrophilizing agent and synthetic fibers can produce more nonvolatil association between hydrophilizing agent and synthetic fibers.Yet surfactant can use or use outside hydrophilizing agent with hydrophilizing agent disclosed herein.

Hydrophilizing agent can comprise greater than the hydrophilizing agent/synthetic fibers of about 3ppm and/or natural fiber combination.Hydrophilizing agent generally can comprise about 10ppm, about 20ppm, about 30ppm or about 40ppm hydrophilizing agent/synthetic fibers and/or the natural fiber combination to about 50ppm, about 60ppm, about 80ppm or about 100ppm.In one aspect, compositions disclosed herein can comprise the hydrophilizing agent greater than about 0.001%.The compositions of this paper can comprise about 0.001% to about hydrophilizing agent of 2%, 5%, 10% or 20%.

On the other hand, hydrophilizing agent can comprise can with the complementary segment of the polymer of synthetic fibers.Complementary segment can comprise polyester segment, and in one aspect, polyester segment can comprise the polyethylene terephthalate segment.In addition, hydrophilic group can be oligomer or polymer.For example, hydrophilic group can be the copolymer of ethoxylated siloxanes.Hydrophilizing agent also can be detergent.This type of hydrophilizing agent can be polymer.The polymer hydrophilizing agent that can be used in the disclosure can include but not limited to polyester, poly-(ethoxylate), poly(ethylene oxide), polyoxyethylene, Polyethylene Glycol, polypropylene glycol, terephthalate, poly(propylene oxide), polyethylene terephthalate, polyoxyethylene terephthalate, ethyoxyl siloxanes or their any combination.Polyester with the p-phthalic acid of detergency ability and other aromatic dicarboxylates can be used as the hydrophilizing agent of fibre structure, other polyester polymers such as described polyester such as polyethylene terephthalate/polyoxyethylene terephthalate and polyethylene terephthalate/polyethylene glycol polymer etc.As noted above, the large-scale hydrophilizing agent that is also known as SRP, SRA and SRE is the material that detergent applications is known.

Comprise random or the unitary high molecular of block PETP/polyethylene terephthalate (PEG) (for example, 40,000 to 50,000 molecular weight) polyester as the detergent in the medicated clothing Cleasing compositions.For example, referring to U.S. Patent Publication 3,893,929,3,959,230 and 3,962,152.Sulfonated straight chain p-phthalic acid ester oligomer is disclosed in U.S.4, in 968,451.Nonionic end capped p-phthalic acid-1,2-propylene diester/polyoxyethylene terephthalic polyester is disclosed in U.S.4, in 711,730 and the end capped block polyester oligomer compounds of nonionic be disclosed in U.S.4, in 702,857.Partially or completely the end capped oligoester of anion further is disclosed in U.S.4, in 721,580 and the end capped terephthalate of anion (especially sulfo group aroyl) be disclosed in U.S.4, in 877,896 and U.S.5,415,807.

United States Patent (USP) 4,427,557 disclose and can be used for the low molecular weight copolyesters (molecular weight 2,000 to 10,000) to give the polyester fiber detergency ability in the aqueous dispersion.Copolyesters forms by ethylene glycol, reaction with Polyethylene Glycol, aromatic dicarboxylate's (for example, dimethyl terephthalate (DMT)) and sulfonated aromatic dicarboxylic acids (for example, 5-sulfoisophthalic acid dimethyl ester) of 200 to 1000 mean molecule quantity.Polyethylene Glycol can replace with monoalky lether (for example methyl ether, ethylether and the butyl ether) part of Polyethylene Glycol.

Hydrophilizing agent can be the copolymer with p-phthalic acid and poly-ethylene oxide block.More particularly, these polymer can comprise the repetitive of PETP and/or p-phthalic acid propylene diester and poly(ethylene oxide) terephthalate, the mol ratio of PETP unit and poly(ethylene oxide) terephthalate units is about 25: 75 to about 35: 65, and wherein the poly(ethylene oxide) terephthalate comprises the poly-ethylene oxide block with molecular weight of about 300 to about 2000.The molecular weight of this polymerization hydrophilizing agent can be about 5,000 to about 55,000 scope.

Another kind of polymerization hydrophilizing agent can be the crystallizable polyester with the unitary repetitive of PETP, described repetitive comprises about by weight 10% to about 15% PETP unit and about by weight 10% to about 50% polyoxyethylene terephthalate unit, described polyoxyethylene terephthalate unit is derived from about 300 to about 6, the polyoxyethylene glycol of 000 mean molecule quantity, and PETP unit and the unitary mol ratio of polyoxyethylene terephthalate in the crystallizable polymerizable compound can be between 2: 1 and 6: 1.The example of this polymer includes but not limited to the material of commercially available acquisition (deriving from DuPont) and

(deriving from ICI).

On the other hand, poly-(ethoxylation) zone can be customized to have the ethoxylation group of any other number of about 1 to about 9,1 to about 12 or 1 to about 15 ethoxylation group and about 1 to about 15 scopes.The number in poly-(ethoxylation) zone can be customized to strengthen the wettability of synthetic fibers.Along with the number increase of the ethoxylation group in poly-(ethoxylation) zone, the wettability of synthetic fibers can strengthen.Randomly, can be used for controlling the degree of crystallinity of hydrophilizing agent such as but not limited to the additional copolymer of Polyethylene Glycol and polypropylene glycol.

One alternative aspect, the hydrophilizing agent that is provided by the disclosure can be illustrated as and comprise a kind of of about by weight 25% to about 100% ester, the described ester formula (CAP) that sees service _x(EG/PG) _{Y '}(OEG) _{Y "}(PEG) _{Y " '}(T) _z(SIP) _qWherein (CAP) represents end-capped unit i) sodium-salt form; (EG/PG) represent oxygen ethyleneoxy and oxo-1,2-propenyloxy group unit ii); (DEG) represent two (oxygen ethylene) oxygen base unit iii); (PEG) poly-(oxygen ethylene) the oxygen base unit of representative iv); (T) represent the paraphenylene terephthalamide unit v); (SIP) represent 5-sulfo group isophthaloyl unit sodium-salt form vi); X is about 1 to 2; Y ' is about 0.5 to about 66; Y " is 0 to about 50; Y " ' be 0 to about 50; Y '+y "+y " ' adds up to about 0.5 to about 66; Z is about 1.5 to about 40; Q is about 0.05 to about 26; Wherein x, y ', y ", y " ', the average mol of corresponding units in z and every mole of ester of q representative.Hydrophilizing agent can be wherein by weight at least about 50% ester has about 500 those of molecular weight to about 5,000 scopes.

In one aspect, hydrophilizing agent can have about 0.5: 1 to about 10: 1 oxygen ethyleneoxy and oxo-1, the molar ratio range of 2-propenyloxy group; X is about 2, and y ' is about 2 to about 27, and z is about 2 to about 20, and q is about 0.4 to about 8.Aspect another, x is about 2, and y ' is about 5, and z is about 5, and q is about 1.

Hydrophilizing agent can be during pulping fibre process again and the synthetic fibers surface association.Synthetic fibers also can have the arrangement coating of hydrophilizing agent before pulping fibre again.In addition, hydrophilizing agent can associate as additive for fusing and synthetic fibers before extruding synthetic fibers.

Relate to the additional of hydrophilizing agent and openly can be present in United States Patent (USP) 4,702, in 857,4,861,512,5,574,179 and 5,843,878.The conventional method that utilizes hydrophilizing agent to prepare fibre structure can be present among the WO 07/123702 that announced on November 1st, 2007.

In the surfactant loss of stablizing non-woven material on the other hand, stablizing the optional hydrophilic non-woven of handling from least a and surfactant of component has nothing to do or the nonvolatil basically water-repelling agent except the hydrophilic non-woven that this surfactant was handled.Aspect this, nonvolatil basically water-repelling agent is not usually with the same way as that openly is used for hydrophilizing agent and the fiber associations of non-woven material.Yet local at least coating or barrier material that barrier material can constitute on the hydrophilic non-woven lose with the minimizing surfactant.Barrier material also can be used as local at least coating or barrier material is arranged on the hydrophobic material, and described hydrophobic material expectation keeps hydrophobic performance, for example barrier cuff.Aspect this, this type of barrier material can reduce these hydrophobic materials can be owing to surfactant migration becomes hydrophilic risk, and described surfactant migration also can reduce the performance of absorbent article.In addition, barrier material can be used as local coating or barrier material between the hydrophilic non-woven and the hydrophobic position such as barrier cuff that surfactant was handled, and the hydrophilic non-woven that described surfactant was handled can be the surfactant source during the moistening.

On a large scale the combination of barrier material or barrier material can be used in this aspect that the surfactant of the non-woven material that surface of stability activating agent handled loses.In addition, these barrier materials can utilize spray method, kiss roll method etc. to be applied in non-woven material originally on one's body or on the finished product.The processing that is used for stablizing the surfactant loss of non-woven material can comprise chemical treatment, radiation treatment, Cement Composite Treated by Plasma or their combination.In addition, the surface treatment that improves surface characteristic can followingly realize: lip-deep coating, with suitable hydrophobicity barrier material premixing or mix the hydrophobicity barrier material on the spot, described hydrophobicity barrier material emerges in large numbers from the teeth outwards by further processing.

In one aspect, the fluorocarbon of non-woven material or other materials is handled the hydrophobicity that expectation is provided, make water-resistance that non-woven material or other materials show expectation preventing the surfactant loss or to gather, described loss or gather can be by for example hydrostatic head thermometrically.On the other hand, utilize the fluorocarbon of technology such as plasma that the hydrophobic coating that can provide as thin as a wafer is provided, make the air penetrability of the non-woven material handled not change basically.If desired, inorganic agent only can be administered on the part of substrate surface.These inorganic agents can be administered on the material that is suitable for use as barrier zones or barrier material to prevent the surfactant loss or to gather that described material for example can be used for the non-woven material of this paper on a large scale.Example comprises with all of lower member or any suitable part: base, top flat, absorbent cores, core covering, as described herein remove knoisphere/cover layer, acquisition system, barrier cuff, other absorbent article assemblies and/or their any combination.By way of example, the suitable base material that is used for this processing includes but not limited to non-woven webs, cellulose net, thermoplastic film, modification/film processed (for example, be shaped, perforate) etc.Utilize the example surface processing of fluorocarbon to be described in the following patent: the U.S. Patent Publication 5 that on March 2nd, 1999 was authorized people such as Timmons, 876,753, the U.S. Patent Publication 5 of authorizing people such as Gleason on March 30th, 1999,888,591, the U.S. Patent Publication 6 of authorizing people such as Gleason on April 4th, 2000, the people's such as D ' Agostino of the people's such as D ' Agostino that on March 7th, 045,877,1999 announced PCT patent application announcement March 16 in 99/20504,2000 PCT announces 00/14296.

Other surface coating process that utilize siloxanes or fluoro chemicals are known in the art and can be used for this paper.Conventional coating or surface treatment method are filled the space in the coating material usually, thereby reduce its air penetrability.The basad painting method that hydrophobicity is provided and does not reduce air penetrability is found in that for example U.S. Patent Publication 5,322,729 and PCT are announced WO 96/03501.

For " class stops " performance of expectation is provided, the stable component that plays the barrier coat effect as nonvolatil water-repelling agent basically can comprise or be selected from one or more materials, and described material seals basically or blocks described material and deposits to barrier layer on it the hole opening (relative with total length) on that part of.More particularly, barrier coat can comprise or be selected from thermoplastic (for example hot-melt adhesive), solution, emulsion, dispersion or their any combination.For example, in one aspect, suitable barrier coat water-repelling agent can comprise or be selected from microwax, the behenic acid stearyl ester, sucrose-fatty, polyisobutylene, the ethylene vinyl acetate copolymer resin, Tissuemat E, aliphatic alcohol, sucrose fatty acid ester, stearyl alcohol, has the hardened Semen sojae atricolor ester of sucrose less than the iodine number of 107 (usually less than 90), the distillating still bottoms of natural alcohol, wax ester (sorbitan wax ester, fat-fatty wax ester, the sucrose wax ester), has acetaldol condensation product greater than 60 ℃ fusing point, natural oil wax, lubricating base oil, ceresine, synthetic wax, Cera Flava, stearic acid, spermaceti, Carlow crust wax, oil with hydrogenated soybean, oil with hydrogenated soybean not, Semen Maydis oil, Petiolus Trachycarpi oil, Oleum Cocois, Oleum Ricini, Semen Lini oil, safflower oil, Oleum helianthi, Oleum Vitis viniferae, siloxanes, xanthan gum, Radix Acaciae senegalis, cellulose, the starch of chemical modification and enzyme modification, vaseline, mineral oil, ethylenic copolymer, the vinyl emulsifying agent, sorbitol, polypropylene glycol, glycerol, solid ester, or their any combination.On the other hand, barrier coat can comprise or be selected from microwax, thermoplastic, behenic acid stearyl ester, stearyl alcohol, siloxanes, silicon wax or their any combination.Barrier coat also can comprise or be selected from microwax, hot-melt adhesive or their combination.Suitable hot-melt adhesive includes but not limited to H.b.Fuller ' s HL-1258.

In one aspect, barrier coat can be microwax.A kind of suitable microwax that is used for this purposes is Multiwax W-835, and it can be commercially available from The C.P.Hall Company.This material is highly purified high molecular crystallite pertroleum wax, and it comprises saturated side chain and ring-type non-polar hydrocarbon.

As providing in the disclosure, basically nonvolatil water-repelling agent is the same way as and the fiber associations of non-woven material openly to be used for hydrophilizing agent not usually, although barrier material can constitute hydrophilic non-woven originally on one's body local at least coating or barrier material lose with the minimizing surfactant.For example, in one aspect, when disposable absorbent article comprises upright hoop, water-repelling agent can be administered on the upright hoop or be arranged on hydrophilic non-woven and upright hoop between, perhaps even as coating use or be set on the hydrophilic non-woven to reduce the surfactant loss.

In the surfactant loss of stablizing non-woven material on the other hand, stablize the optional hydrophilic non-woven of handling from least a and surfactant of component irrelevant, separate or the nonvolatil basically water-repelling agent except it with it, that is the fiber associations in the non-woven material do not handled with mode identical and surfactant of this water-repelling agent, with the hydrophilizing agent of fiber associations.Therefore, the non woven fibre that comprises nanofiber provides with more conventional supatex fabric and compares better barrier properties.By the non-woven material that utilizes nanofiber or comprise nanofiber as stopping, even absorbent article holds performance at the moisture that takes place also can keep under the situation of certain surfactant migration expecting.In one aspect, nanofiber or the non-woven material that comprises nanofiber can in diaper, be used as on the core stop, outer covering piece and/or lower limb hoop.Relating to the additional of nanofiber effectiveness and preparation method openly can be present in the U.S. Patent Application Publication of announcing on March 31st, 2,005 2005/0070866.

Aspect this, stable component can be nonvolatil basically water-repelling agent, and this water-repelling agent comprises the non-woven material that contains nanofiber, and wherein: a) nanofiber has the average diameter less than a micron; And b) non-woven material that comprises nanofiber has less than about 15 microns average pore size with less than about 20% the aperture coefficient of variation.

Nanofiber has usually less than about 1 micron diameter, and they are included in the fiber that comprises remarkable quantity in the one deck of the non-woven webs in the absorbent article usually therein, and described content is usually at least about 50%.Nanofiber can be prepared by melt film fibrillation process, described method generally comprises following steps: polymer melt is provided, utilize central fluid stream to form the elongated hollow polymeric film tube, and utilize this fluid stream and/or other fluids stream to form many nanofibers by hollow pipe.Suitable nanofiber and preparation thereof are disclosed in the U.S. Patent Application Publication 2005/0070866.

Aspect another, nanofiber can be made by melt film fibrillation process, said method comprising the steps of: the polymer that the polymer melt form a) is provided; B) utilize central fluid stream to form the elongated hollow polymeric film tube, c) utilize fluid to form many nanofibers by hollow polymeric film tube; And d) provide the spinneret orifice of pressing mold collector distance to obtain the aperture coefficient of variation less than about 20% with optimization.

Useful nanofiber comprises can be by those of one or more thermoplastic polymers preparation.The limiting examples that is applicable to the thermoplastic polymer of present patent application comprises polyolefin, polyester, polyamide, polystyrene, polyurethane, the biodegradable polymer that comprises thermoplastic starch, PHA, PLA, starch composites and their any combination.Homopolymer, copolymer, interpretation (it comprises terpolymer etc.) and blend thereof are included in this description.Aspect this, nanofiber can comprise polyolefin by useful polymer prepared therefrom, for example polypropylene, polyethylene, nylon, polyethylene terephthalate etc.

Suitable thermoplastic polymer comprises any polymer that is applicable to melt spinning.The rheologic behavio(u)r of polymer can make polymer to melt extrude and can form thin film.The melt temperature of polymer generally can be about 25 ℃ to about 400 ℃.The polymer of this aspect can have less than about 400 decigrams/minute melt flow rate (MFR) when it is present in the die head, as utilizes ASTM method D-1238 measured.In one aspect, melt flow rate (MFR) can be less than about 300 decigrams/minute, less than about 200 decigrams/minute, perhaps less than about 100 decigrams/minute.The typical range of melt flow rate (MFR) is about 1 decigram/minute to about 100 decigrams/minute.In general, respond well in this scope than low melt flow speed; Therefore, can utilize and have less than about 50 decigrams/minute and less than the polymer of about 40 decigrams/minute melt flow rate (MFR).

Fiber can be the one-component fiber or such as the multicomponent fibre of bicomponent fibre.Fiber can have the suitable geometric configuration of skin-core or parallel type or other.Make after the fiber, fiber is can be before it forms fleece processed or apply, and/or handles fleece itself after the fleece preparation.Therefore, optional additive can be mixed into and after fiber forms, move in the fluoropolymer resin of fiber surface, and can be used for changing or " adjustment " fibre property.Usually, moving to lip-deep any additives may need to utilize the external energy such as heat to solidify, perhaps lip-deep additive may need with another kind of component chemical reaction or solidify and may make annexing ingredient to utilize the resin that contains additive to add in the technology when the preparation fiber or after the preparation fiber by catalysis in the presence of another kind of component.Suitable inorganic agent comprises can change or adjust the hydrophilicity of fiber or the inorganic agent of hydrophobic performance, and an example of described inorganic agent is with the inorganic agent of polydimethylsiloxane as the hydrophobic treatment agent.Concrete inorganic agent depends on the type of fibroreticulate purposes, polymer etc.

A kind of process useful for preparing nanofiber of the present disclosure is melt fibrillation processes, for example melt film fibrillation process.In general, melt film fibrillation process relates to provides polymer melt, utilizes central fluid stream to form the elongated hollow polymeric film tube, utilizes fluid to form many nanofibers by hollow pipe subsequently.Suitable method is specified in the United States Patent (USP) 4,536,361 of for example authorizing Torobin and authorizes in the United States Patent (USP) 6,382,526 and 5,520,425 of Reneker.Melt film fibrillation process can be utilized multiple different processing conditions.The method of Reneker more specifically may further comprise the steps: in circular column, the exit that forms the circular column of gas jet spaces therein forms thin film or pipe with the polymer feed.Gas column provides pressure subsequently on the inner periphery of polymer pipe.When polymer pipe left gas jet spaces, it was blown into open many fubrils that comprise nanofiber owing to expansible center gas.

Another example of melt film fibrillation process is present in the U.S. Patent Application Publication 2005/0070866, it has described following steps particularly: molten polymer forms polymer melt, polymer melt is extruded by the spinneret orifice that comprises central fluid stream made that polymer-extruded is the elongated hollow pipe.The elongated hollow polymer pipe can be circle, ellipse, irregularly shaped or any other shape with hollow region.In some cases, the elongated hollow polymer pipe can be immediately by conquassation after formation.Under the situation of conquassation pipe, usefully in pipeline, have thin-walled or weakening part to help fibrillation.Become fine fluidic limiting examples to be gas such as nitrogen or air.In one aspect, become the fine fluid can be under temperature near melted polymer temperature.For example, become fine fluid temperature (F.T.) being higher than under the temperature of molten polymer to help flowing and the formation of hollow pipe of polymer.Alternatively, become fine fluid temperature (F.T.) can be lower than formation and the curing of melted polymer temperature to help nanofiber.In one aspect, become fine fluid temperature (F.T.), for example be lower than melting point polymer and surpass about 50 ℃, perhaps be lower than melting point polymer and surpass about 100 ℃, perhaps only be under the ambient temperature less than melting point polymer.Become fine fluidic pressure to be enough to make the nanofiber fibrillation and can be higher than molten polymer a little and extrude pressure when leaving spinneret orifice.

Disclosure nanofiber in this respect is used to prepare the non-woven webs that can constitute whole non-woven composites.This fleece can have one or several layers, and it generally is described as be in independent fiber sedimentation or forms a fleece or a fibroreticulate part for preparing in the step.These fleeces will comprise the one or more layers with remarkable quantity nanofiber usually, and described nanofiber has the diameter less than a micron.Aspect this, " significantly quantity " is defined as at least about 25% of the present disclosure.Significantly the fiber of quantity can surpass the about 35% of fiber total amount in the described layer, surpasses approximately 50%, perhaps surpasses about 75%.Fleece can contain 100% the fiber less than an about micron diameter of having.Fibre diameter in the fleece can utilize scanning electron microscope to measure under greater than about 500 times and about at the most 10,000 times amplification according to the visual analyzing needs.For the fiber that determines whether remarkable quantity has diameter less than one micron, typical measuring condition comprise can be measured at least about 100 fibers or multifilament more, measurement can take place on a plurality of zones that spread all over described layer, and enough samplings of carrying out significance on the statistical significance.

The fibre diameter of the big fiber of about at the most 75% residue can have the fibre diameter in any scope.Usually, bigger fibre diameter will be served as reasons only above one micron to about 10 microns.

In addition for this aspect, in the layer significantly the fiber of quantity will have less than about 900 nanometers and be generally the fibre diameter of about 100 nanometers to about 900 nanometers.Described fiber can have less than 700 nanometers and about 300 diameters to about 900 nanometers.Described diameter depends on fibroreticulate intended use usually.With regard to method and product beneficial effect, can expect in some applications to contain remarkable quantity have less than the fiber of about one micron diameter and significantly quantity have a fiber greater than an about micron diameter.Bigger fiber can capture and fixing nanofiber, it is characterized by can help to reduce to clump together or twist into the nanofiber quantity of rope and prevent that nanofiber from being taken away by spuious air-flow.

In one aspect, nanofiber can have less than about one micron average diameter, wherein hydrophilic non-woven and associating hydrophilizing agent have less than about 15 microns average pore size with less than about 20% the aperture coefficient of variation, and wherein nanofiber is made by melt film fibrillation process, said method comprising the steps of: the polymer that the polymer melt form a) is provided; B) utilize central fluid stream to form the elongated hollow polymeric film tube, c) utilize fluid to form many nanofibers by hollow polymeric film tube; And d) provide the spinneret orifice of pressing mold collector distance to obtain the aperture coefficient of variation less than about 20% with optimization.

Nanofiber layer in the fleece of the present disclosure can comprise more than one polymer.In addition, different polymer or polymer blends can be used for different spinneret orifices has different fibre diameters and different polymer compositions with preparation in fleece layer.Can expect to prepare single layer nonwoven with different fibre diameters.In addition, can expect that preparation has multiwalled non-woven webs, wherein every layer all has different fibre diameters.Melt film fibrillation process can be modified into the fiber of preparation major diameter and minor diameter to produce different fleeces.These and other aspect that preparation comprises the non-woven webs of nanofiber is present in the U.S. Patent Application Publication 2005/0070866.

In diaper or other absorbent articles, fleece can be used as barrier layer as disclosed herein.These fleeces that comprise nanofiber also can be used as height barrier cuff with high hydrostatic pressure head so that the seepage incident probability of the thin narrow crotch district diaper of expecting for comfortableness and stickiness is low, even and also can be used as and stop and make that the moisture that certain surfactant migration absorbent article also can keep expecting takes place holds performance.For example, in diaper or other disposable absorbent products, the non-woven webs that comprises nanofiber can be used as the barrier layer.This barrier layer can be arranged between the skin of absorbent cores and disposable absorbent article, and described absorbent cores mainly is responsible for fluid handling properties, for example gathers, carries, distributes and preserve body fluid.Perhaps alternatively, the barrier layer also can be arranged between absorbent cores and the top flat, and it also can be absorbent, and it has the balance between convection current performance and the absorption barrier properties usually.The convection current performance reduces the relative humidity in the space between absorbent article and the wearer's skin effectively.The combination of fluid absorbent and liquid obscures performance provide to the protection of drenched problem and absorbent article be in impact and/or lasting pressure following time especially favourable.The other description and the beneficial effect on barrier layer are found among the WO 01/97731.

Under the surfactant migration situation, when enough surfactants leave the hydrophilic material of design and migration make design water wetted material near or when becoming hydrophobic material, may not can cause the startup of Wetting indicator, even the degree that absorbent article has kept enough wettabilitys to be activated according to its desired design to described Wetting indicator.Wetting indicator can be arranged between absorbent cores and the egative film, for example be arranged in non-woven dust layer/cover layer, and surfactant is moved to by non-woven dust layer/cover layer and can be caused dust layer/cover layer to demonstrate in hoop, the core etc. making liquid by arriving the difficulty aspect the Wetting indicator.Yet, Wetting indicator can with stable combination of components of the present disclosure providing as the design of the designed Wetting indicator that works, described providing is by promoting liquid to the Wetting indicator migration but not make the surfactant of migration flow to other parts of upright hoop or absorbent article.

Therefore, disposable absorbent article of the present disclosure also can comprise the Wetting indicator that is arranged between absorbent cores and the egative film and keeps liquid to communicate with absorbent cores.In one aspect, Wetting indicator can comprise central figure and background graphics, and wherein background graphics comprises at least a response color-forming compositions, and described response color-forming compositions shows visible change when moistening.For example, visible change can be change color, graphic change or their combination.In some aspects, central figure is hidden wetted until for example figure by background graphics.The example of suitable Wetting indicator is provided at United States Patent (USP) 7,332, in 642 and EP1,242,027.

For example, Fig. 4 A and 4B show absorbent article 320 of the present disclosure, and described absorbent article comprises top flat 330, absorbent cores 340 and egative film 350, and wherein Wetting indicator 360 comprises the background graphics of painted animal, its in a single day wetted (shown in 4B) then shows the central figures of different painted animals.Fig. 5 A and 5B show absorbent article of the present disclosure, and wherein Wetting indicator comprises the central figure of painted raindrop, and it displays when painted greatly vividly bubble background graphics moistening.In other respects, the different color of central figure that background graphics displays in the time of can having with moistening, it can indicate the difference of Wetting indicator before and after moistening.Similarly, Fig. 6 A and 6B show the background graphics of Wetting indicator can be wetted to show central figure, the color that described central figure has with background graphics is different fully or part is different.For example, can be blueness greatly or than each color before moistening in the minute bubbles among Fig. 6 A, but after moistening (as shown in Fig. 6 B) only the color changeable of reduced size bubble become pink, remain blueness than the air pocket color and can present pink than the raindrop color in the air pocket after the moistening around simultaneously.In addition, the color of each in the bubble before moistening can be blueness, and the raindrop that display during moistening can every kind be the color different with initial blue bubble and can be the color that differs from one another.

According to the disclosure, the response color-forming compositions can comprise the pigment by the weight of described compositions about 1% to about 10%.In addition, described compositions can comprise about 2% to about 8% or about 3% to about 7% pigment.

The solid pigment particle that can be used for Wetting indicator includes but not limited to for example pigment yellow (C.I.14), paratonere (C.I.48:3), alizarol saphirol (C.I.15:4), pigment black (C.I.7) or their any combination.

The response color-forming compositions also can comprise the fluid dyestuff by the weight of described compositions about 1% to about 10%.In others, described compositions comprises about 2% to about 8% or about 3% to about 7% fluid dyestuff.

Suitable fluid dyestuff comprises aqueous ink coloring agent such as direct dyes, acid stain, basic stain, and the soluble dyestuff of multiple solvent etc.Example includes but not limited to FD﹠amp; C indigo plant 1 (C.I.42090:2), D﹠amp; Red 6 (C.I.15850) of C, D﹠amp; Red 7 (C.I.15850:1) of C, D﹠amp; Red 9 (C.I.15585:1) of C, D﹠amp; Red 21 (C.I.45380:2) of C, D﹠amp; Red 22 (C.I.45380:3) of C, D﹠amp; Red 27 (C.I.45410:1) of C, D﹠amp; Red 28 (C.I.45410:2) of C, D﹠amp; Red 30 (C.I.73360) of C, D﹠amp; Red 33 (C.I.17200) of C, D﹠amp; Red 34 (C.I.15880:1) and the FD﹠amp of C; C Huang 5 (C.I.19140:1), FD﹠amp; C Huang 6 (C.I.15985:1), FD﹠amp; C Huang 10 (C.I.47005:1), D﹠amp; C orange 5 (C.I.45370:2) and their any combination.

In addition, the response color-forming compositions can comprise about 10% to about 99% solvent.In one aspect, described compositions comprises about 30% to about 85% solvent.On the other hand, described compositions comprises about 40% to about 75% solvent.

The solvent that can be used in the Wetting indicator disclosed herein can be selected from water, non-aqueous solvent or their any combination.For example, useful non-aqueous solvent comprises alcohol, acetas and their combination.The example of alcoholic solvent includes but not limited to isopropyl alcohol, normal propyl alcohol, ethanol, methanol and their combination.Similarly, suitable acetas solvent includes but not limited to isopropyl acetate, n-propyl acetate and their combination.

Can be used in the Wetting indicator commercially available with trade name Omutsu-you-G ICC pants-you Hkonku v/M (becoming English) from Osaka Printing Industries by Japanese Translator so that central figure and background graphics all are arranged on suprabasil exemplary ink.

One alternative aspect, the response color-forming compositions comprises by the fluid dyestuff of the weight of described compositions about 1% to about 10% with by the solvent of the weight of described compositions about 10% to about 99%.When response did not contain pigment in the color-forming compositions, this based composition can be close to the varnish coat setting, and said composition is specified in United States Patent (USP) 7,332, in 642.At this on the one hand, the response color-forming compositions comprises about 2% to about 8%, usually about 2.5% to about 7% or about 3% to about 6% fluid dyestuff.In addition, this based composition can comprise about 30% to about 80% solvent or about 40% to about 75% solvent.

Central figure in the Wetting indicator disclosed herein can comprise additional response color-forming compositions in addition, and described additional response color-forming compositions comprises and the identical or similar component of the first response color-forming compositions.

On the other hand, goods of the present disclosure also can comprise permanent color-forming compositions, especially in Wetting indicator.This permanent color-forming compositions comprises the pigment by the weight of described compositions about 1% to about 10%.Those that provide with respect to the response color-forming compositions are provided suitable pigment.In this respect, permanent color-forming compositions can comprise about 10% to about 99%, about 30% in addition to about 80%, perhaps about 40% non-aqueous solvent to about 75% content.In addition, those solvent based that are applicable to this aspect are similar to those of color-forming compositions of being used to respond disclosed herein.

Another example of suitable Wetting indicator is provided at EP 1,242, in 027.In this respect, indicator can be printed on the impermeable polymer egative film, changes its color when urine or moisture arrival indicator.

Fig. 2 is the plane graph according to diaper 10 in a certain respect of the present disclosure, wherein can adopt stable component of the present disclosure and Wetting indicator.Diaper 10 is shown as its open and flat not contraction state (that is the nonelastic contraction that causes) and the part of diaper 10 is cut more to clearly illustrate the fabric of diaper 10.The part of contact wearer's diaper 10 is in the face of the observer among Fig. 2.Diaper 10 generally can comprise base 12 and the absorbent cores 14 that is arranged in the base.

The base 12 of diaper 10 can comprise the main body of diaper 10 among Fig. 2.Base 12 can comprise the outer covering piece 16 that contains top flat 18 and/or egative film 20, and described top flat can be fluid permeable, and it is impermeable that described egative film can be liquid.Absorbent cores 14 can be encapsulated between top flat 18 and the egative film 20.Base 12 also can comprise lateral plate 22, elastification lower limb hoop 24 and/or elastic waist features 26.

Lower limb hoop 24 and elastic waist features 26 can comprise elastic component 28 usually separately.An end of diaper 10 can be configured as first lumbar region 30 of diaper 10.The relative end of diaper 10 can be configured as second lumbar region 32 of diaper 10.The mid portion of diaper 10 can be configured as crotch district 34, and it is longitudinal extension between first lumbar region 30 and second lumbar region 32.Lumbar region 30 and 32 can comprise flexible member, makes them accumulate in waist stickiness and the property held (elastic waist features 26) so that improvement to be provided on every side.Crotch district 34 is that part between two lower limbs that generally are positioned at the wearer of diaper 10 when diaper 10 is worn.

Diaper 10 described in Fig. 2 has longitudinal axis 36 and axis of pitch 38.The periphery 40 of diaper 10 is limited by the outward flange of diaper 10, and wherein longitudinal edge 42 is roughly parallel to longitudinal axis 36 extensions of diaper 10, and extend between the longitudinal edge 42 of the axis of pitch 38 that is roughly parallel to diaper 10 on elastic tip limit 44.Base 12 also can comprise fastening system, and it can comprise at least one fastening member 46 and at least one stored landing zone 48.

Diaper 10 also can be included in other this base part known in the art, and auricle and back auricle, waist cap assembly, elastomeric element etc. before comprising are to provide better stickiness, sealing and aesthetic performance.This type of optional feature is in being known by people for this area and for example being described in United States Patent (USP) 3,860,003 and United States Patent (USP) 5,151,092.

For diaper 10 being remained on the appropriate location around the wearer, at least a portion of first lumbar region 30 can be connected at least a portion of second lumbar region 32 to form leg opening and goods waist by fastening member 46.When fastening, fastening system bears the tensile load around the goods waist.Fastening system can allow the goods user to grasp element a such as fastening member 46 of fastening system, and at least two positions first lumbar region 30 is being connected on second lumbar region 32.This can realize by the adhesion strength between the element of handling tightening device.

According to some aspect, diaper 10 can have the fastening system of Reclosable, perhaps can be used as another and selects to provide with the form of trousers type diaper.When absorbent article was diaper, it can comprise the fastening system that joins the Reclosable on the base to, and described system is used for diaper is fixed on one's body the wearer.When absorbent article was trousers type diaper, goods can comprise that at least two lateral plates that join on the base and be engaged with each other are to form trousers.Fastening system and any assembly thereof can comprise any material that is applicable to this purposes, include but not limited to plastics, thin film, foam, non-woven material, weaving material, paper, layered product, fibre-reinforced plastics etc. or their combination.In some embodiments, the material of formation tightening device can be flexibility.This pliability can allow fastening system to conform to the shape of health, therefore can reduce the probability that fastening system stimulates or injure wearer's skin.

For unitary absorbent articles, base 12 and absorbent cores 14 can be formed on adds the main structure that forms the diaper 10 of composite diaper structure behind other parts.Yet top flat 18, the configuration that egative film 20 and absorbent cores 14 can multiplely be known is assembled, for example, the diaper configuration general description was authorized people such as Roe on the 10th in JIUYUE in 1996 name is called the United States Patent (USP) 5 of " Absorbent Article With Multiple Zone Structural Elastic-Like Film Web Extensible Waist Feature ", 554,145, the name of authorizing people such as Buell on October 29th, 1996 is called the United States Patent (USP) 5 of " Disposable Pull-On Pant ", 569, the name that 234 and 1999 on Decembers were authorized people such as Robles in 21 is called the United States Patent (USP) 6 of " Absorbent Article With Multi-Directional Extensible Side Panels ", in 004,306.

The elastification or can be shortened wholly or in part of top flat 18 among Fig. 2 between top flat 18 and absorbent cores 14, to provide void space.The exemplary configurations that comprises elastification or shortening top flat is described in greater detail in the following patent: the name of authorizing people such as Allen on August 6th, 1991 is called the United States Patent (USP) 5 of " Disposable Absorbent Article Having Elastically Extensible Topsheet ", 037,416, the name that December in 1993 was authorized people such as Freeland on the 14th is called the United States Patent (USP) 5 of " Trisection Topsheets for Disposable Absorbent Articles and Disposable Absorbent Articles Having Such Trisection Topsheets ", 269,775.

Egative film 20 can be connected with top flat 18.Egative film 20 can prevent to be absorbed core 14 absorptions and be contained in other external articles that the effluents in the diaper 10 are made possibility touching diaper 10 dirty, for example sheet and underwear.In some aspects, egative film 26 can be impermeable and the layered product that comprise non-woven material and thin plastic sheeting of liquid (for example urine) basically, and described thin film for example has the thermoplastic film of about 0.012mm (0.5mil) to about 0.051mm (2.0mil) thickness.Suitable backsheet film comprises (Terre Haute, Ind.) those products of making and selling with trade name X15306, X10962 and X10964 by Tredegar Industries Inc..Other suitable stock footage can comprise makes steam overflow, prevent that also effluent from seeing through the gas permeable material of egative film 10 simultaneously from diaper 10.Exemplary breathable materials can comprise such as the material of woven web, non-woven webs, such as the composite of the non-woven webs of film coating and such as Mitsui Toatsu Co., called after ESPOIRNO and EXXON Chemical Co. (Bay City, Tex.) microporous membrane of the called after EXXAIRE of Zhi Zaoing that Japan makes.The suitable breathable composite materials that comprises polymer blend with title HYTREL blend P18-3097 derive from Clopay Corporation (Cincinnati, Ohio).This type of breathable composite materials is described in greater detail in the PCT patent application WO 95/16746DuPont that is published in June 22 nineteen ninety-five with the name of E.I.DuPont.Other breathable backsheet that comprises nonwoven web and perforate formed film is described in the United States Patent (USP) 5,571,096 of authorizing people such as Dobrin on November 5th, 1996.

Fig. 3 shows along the cross section of Fig. 2 of the transversal 2-2 intercepting of Fig. 2.By beginning towards wearer's side, diaper 10 can comprise the assembly and the egative film 20 of top flat 18, absorbent cores 14.According in a certain respect, diaper 10 also can comprise be arranged on liquid permeable topsheet 18 and absorbent cores 14 towards the acquisition system 50 between wearer's side.Acquisition system 50 can directly contact absorbent cores.Acquisition system 50 can comprise simple layer or a plurality of layer, such as towards the upper acquisition layer 52 of wearer's skin with towards the lower acquisition layer 54 of wearer's clothes.According on the other hand, acquisition system 50 can be used to admit liquid to shove, and for example urine is shoved.In other words, acquisition system 50 can be used as the temporary storage device of liquid till absorbent cores 14 absorbs liquid.

In some aspects, acquisition system 50 can comprise the cellulose fibre of chemical crosslinking.The cellulose fibre of exemplary chemical crosslinking is disclosed in United States Patent (USP) 5,137, in 537." top " acquisition layer all can comprise non-woven material with one of " bottom " acquisition layer 52 and 54 or both, and described non-woven material can be hydrophilic.In addition, according to the disclosure, upper acquisition layer and one of lower acquisition layer 52 and 54 or both all can comprise the cellulose fibre of chemical crosslinking, and described fiber can form or can not form the part of non-woven material.

The suitable non-woven material that is used for upper acquisition layer and lower acquisition layer 52 and 54 includes but not limited to the SMS material, and it comprises spunbond layer, meltblown layer and another spunbond layer.In some aspects, utilize the permanent hydrophilic non-woven material, in particular to non-woven material with durable hydrophilic coating.Another kind of suitable material comprises the SMMS structure.On the other hand, non-woven material can be porous.

According on the other hand, suitable non-woven material can include but not limited to synthetic fibers, for example PE, PET and PP.Because it is hydrophobic that the polymer itself that is used for non-woven material production can be, therefore they can be coated with and be covered with hydrophilic coating.In addition, this type of non-woven material usable surface activating agent is handled strengthening its water-wet behavior, and stable component disclosed herein and method have solved the stability of material aspect surfactant loss during moistening, elimination or eluting that this type of surfactant was handled.

A kind of method that preparation has the non-woven material of durable hydrophilic coating is by hydrophilic monomer and radical polymerization initiator are administered on the non-woven material, carry out polymerization by ultraviolet activation, gained is for being chemically bonded to the lip-deep monomer of non-woven material, described in U.S. Patent Publication 2005/0159720.The another kind of method for preparing the non-woven material with durable hydrophilic coating is for to apply non-woven material with hydrophilic nanoparticles, described in people's such as Rohrbaugh U.S. Patent Publication 7,112,621 and PCT Shen Qing Publication WO 02/064877.

Useful in addition non-woven material is described in people's such as Cramer U.S. Patent Publication 6,645,569, people's such as Cramer U.S. Patent Publication 6,863,933, people's such as Rohrbaugh U.S. Patent Publication 7,112,621, in people's such as people's such as Cramer U.S. Patent Application Publication 20030148684 and Cramer 20050008839.

In some cases, before the coated with nano grain coating, pretreatment can be carried out with high power treatment method (corona, plasma) in the non-woven material surface.Therefore the high energy pretreatment can temporarily increase the surface energy of low-surface-energy surface (such as PP) usually, makes the non-woven material can be by the moistening better of the nanoparticle dispersion in the water.

The non-woven material that is noted that permanent hydrophilic also is applicable to other parts of absorbent article.For example, found to comprise that the top flat and the absorbent core layer result of use of non-woven material of aforesaid permanent hydrophilic is good.

Absorbent cores 14 operated by rotary motion between top flat 18 and egative film 20 and can comprise two-layer, first absorbed layer 60 and second absorbed layer 62.First absorbed layer 60 of absorbent cores 14 comprises absorbability particular polymers material 66 and the thermoplastic compounds 68 at least a portion of the absorbent polymeric material 66 and first substrate 64 in first substrate 64, first substrate 64, and it makes absorbent polymeric material 66 cover and be fixed in first substrate 64 as binding agent.According to a further aspect in the invention, first absorbed layer 60 of absorbent cores 14 also can comprise the cover layer on the thermoplastic compounds 68.Thermoplastic compounds can be thermoplastic adhesive materials, and its as used herein being interpreted as comprises polymer composition, and fiber is formed and be administered on the superabsorbent material to plan under dry and moistening two states fixedly superabsorbent material by described polymer composition.Thermoplastic adhesive materials of the present invention forms fibrous network on superabsorbent material.

Equally, shown in Fig. 3 the best, second absorbed layer 62 of absorbent cores 14 also can comprise the thermoplastic compounds 76 at least a portion of absorbent polymeric material 74 in second substrate 72, second substrate 72 and the absorbent polymeric material 74 and second substrate 72, and described compositions is used for absorbent polymeric material 74 is fixed to second substrate 72.Although not shown, second absorbed layer 62 also can comprise cover layer.

The substrate 64 of first absorbed layer 60 can be called except that knoisphere/cover layer and have towards the first surface of the egative film 20 of diaper 10 with towards the second surface of absorbent polymeric material 66.Equally, the substrate 72 of second absorbed layer 62 can be called the core covering and have towards the first surface of the top flat 18 of diaper 10 with towards the second surface of absorbent polymeric material 74.First substrate 64 and second substrate 72 can utilize around the binding agent of periphery is adhering to each other and form coverings to center on absorbent polymeric material 66 and 74, thereby absorbent polymeric material 66 and 74 is remained in the absorbent cores 14.

According to other aspects, first and second absorbed layers 60 and 62 substrate 64 and 72 can be non-woven material, those for example above-mentioned non-woven materials.

Can be used as absorb molectron the exemplary absorbent structrual description in following patent: United States Patent (USP) 4,610,678 (people such as Weisman); United States Patent (USP) 4,834,735 (people such as Alemany); United States Patent (USP) 4,888,231 (Angstadt); United States Patent (USP) 5,260,345 (people such as DesMarais); United States Patent (USP) 5,387,207 (people such as Dyer); United States Patent (USP) 5,397,316 (people such as LaVon); With United States Patent (USP) 5,625,222 (people such as DesMarais).

In the non-woven material that provides with this basic design, especially in the non-woven material of in-core, the surfactant migration during the moistening can cause the pollution and the moistening of (for example, in the upright hoop) in the miscellaneous part of absorbent article.Therefore, when surfactant passes the absorbent article migration by absorbent cores or be diffused into because of the selecteed material of its hydrophobicity barrier property (for example uprightly binding round) upward, these hydrophobic materials can become hydrophilic, thereby further reduce the performance of goods owing to the forfeiture of its barrier property.Method and structure provided herein can address this problem and can be applied on the interior disclosed any suitable material of above-mentioned basic diaper design.Therefore, the method and structure that this paper provided can prevent because the pollution that migration causes.These method and structures are any applicable in other absorbent articles disclosed herein also.

This paper is related transfers Procter ﹠amp; All patents of Gamble Company are incorporated into way of reference on the degree consistent with it in view of the above with patent application (comprising above disclosed any patent).

Dimension disclosed herein and value are not intended to be understood that strictly to be limited to described exact value.On the contrary, except as otherwise noted, each such dimension all is meant the numerical value of being quoted and centers on the scope that is equal on the function of this numerical value.For example, the dimension that is disclosed as " 40mm " is intended to expression " about 40mm ".

The All Files of quoting in detailed Description Of The Invention is all incorporated this paper into way of reference.Should not be interpreted as all admitting that for quoting of any file it is relevant prior art of the present invention.When any implication of term in any implication of term among the present invention or definition and the file of incorporating into way of reference or when defining contradiction, should obey the implication or the definition of giving this term in the present invention.

Although illustrated and described the present invention with specific embodiments, it will be apparent to those skilled in the art that and under the situation that does not deviate from essence of the present invention and protection domain, can make many other change and modification.Therefore, claims all such changes and modification of being intended to be included in the scope of the present invention.

Claims (10)

1. disposable absorbent article, described disposable absorbent article comprises:

A) base, described base comprise the top flat of fluid permeable and join the impermeable egative film of liquid on the described top flat at least in part to; With

B) absorbent cores, described absorbent cores are at least partially disposed between described top flat and the described egative film and comprise absorbent polymeric material;

Wherein said disposable absorbent article or its any assembly comprise hydrophilic non-woven, and described hydrophilic non-woven comprises a plurality of synthetic fibers that surfactant was handled;

Described disposable absorbent article also comprises:

C) be used to reduce the stable component of losing from the surfactant of described hydrophilic non-woven during moistening, described liptinite branch is selected from:

I) the associating nonvolatil basically hydrophilizing agent of at least a and described hydrophilic non-woven;

The ii) at least a nonvolatil basically water-repelling agent that is independent of described hydrophilic non-woven; Perhaps

Iii) i) with ii) combination.

2. disposable absorbent article as claimed in claim 1, described disposable absorbent article also comprises:

A) and described absorbent cores in abutting connection with and be arranged on core covering between described top flat and the described absorbent cores;

B) and described absorbent cores in abutting connection with and be arranged on dustproof covering between described egative film and the described absorbent cores;

C) be arranged on acquisition system between described top flat and the described absorbent cores, or

D) their any combination.

3. the described disposable absorbent article of each claim as described above, wherein:

Described liptinite is divided into nonvolatil basically hydrophilizing agent; And

One or more of described synthetic fibers comprise polymer and described hydrophilizing agent, wherein said polymer and described hydrophilizing agent comprise associating each other complementary segment, preferably described liptinite is divided into nonvolatil basically water-repelling agent, and described water-repelling agent is selected from fluorocarbon, siloxanes, silicon wax, thermoplastic, hot-melt adhesive, microwax, the behenic acid stearyl ester, sucrose-fatty, polyisobutylene, the ethylene vinyl acetate copolymer resin, Tissuemat E, aliphatic alcohol, sucrose fatty acid ester, stearyl alcohol, has the hardened Semen sojae atricolor ester of sucrose less than 107 iodine number, the distillating still bottoms of natural alcohol, wax ester, the sorbitan wax ester, fat-fatty wax ester, the sucrose wax ester, has acetaldol condensation product greater than about 60 ℃ fusing point, natural oil wax, lubricating base oil, ceresine, synthetic wax, Cera Flava, stearic acid, spermaceti, Carlow crust wax, oil with hydrogenated soybean, oil with hydrogenated soybean not, Semen Maydis oil, Petiolus Trachycarpi oil, Oleum Cocois, Oleum Ricini, Semen Lini oil, safflower oil, Oleum helianthi, Oleum Vitis viniferae, xanthan gum, Radix Acaciae senegalis, cellulose, the starch of chemical modification, the starch of enzyme modification, vaseline, mineral oil, ethylenic copolymer, the vinyl emulsifying agent, sorbitol, polypropylene glycol, glycerol, solid ester, or their any combination.

4. the described disposable absorbent article of each claim as described above, wherein said liptinite is divided into nonvolatil basically water-repelling agent, and described water-repelling agent comprises the non-woven material that contains nanofiber, wherein:

A) described nanofiber has the average diameter less than a micron; And

B) non-woven material that comprises nanofiber has less than about 15 microns average pore size with less than about 20% the aperture coefficient of variation.

5. disposable absorbent article as claimed in claim 4, wherein said nanofiber is made by melt film fibrillation process, said method comprising the steps of:

A) provide the polymer of polymer melt form;

B) utilize central fluid stream to form the elongated hollow polymeric film tube;

C) utilize fluid to form many nanofibers by described hollow polymeric film tube; And

D) provide the spinneret orifice of pressing mold collector distance to obtain the aperture coefficient of variation less than about 20% with optimization.

6. the described disposable absorbent article of each claim as described above, wherein said disposable absorbent article also comprises upright hoop, and be administered to described water-repelling agent on the upright hoop or be arranged on described hydrophilic non-woven and described upright hoop between.

7. the described disposable absorbent article of each claim as described above, wherein said disposable absorbent article is a diaper.

8. the method for the surfactant loss of synthetic fibers during moistening handled of a surface of stability activating agent, described method comprises:

A) provide the disposable absorbent article that comprises hydrophilic non-woven, described non-woven material comprises the synthetic fibers that surfactant was handled;

B) make combination of at least a nonvolatil basically hydrophilizing agent and described hydrophilic non-woven or in other words association; And/or

C) at least a nonvolatil basically water-repelling agent is deposited on the part that is independent of described hydrophilic non-woven of described disposable absorbent article.

Preferably, described method also comprises:

D) Wetting indicator is arranged between described absorbent cores and the described egative film and keeps liquid to communicate with described absorbent cores, described Wetting indicator comprises at least a response color-forming compositions, makes visible change takes place when moistening.

9. disposable absorbent article, described disposable absorbent article comprises:

A) base, described base comprise the top flat of fluid permeable and join the impermeable egative film of liquid on the described top flat at least in part to;

B) absorbent cores, described absorbent cores are at least partially disposed between described top flat and the described egative film and comprise absorbent polymeric material;

Wherein said disposable absorbent article or its any assembly comprise hydrophilic non-woven, and described hydrophilic non-woven comprises a plurality of synthetic fibers that surfactant was handled;

Described disposable absorbent article also comprises:

C) be used to reduce the stable component that the surfactant of described hydrophilic non-woven during moistening loses, described liptinite branch is selected from:

I) the associating nonvolatil basically hydrophilizing agent of at least a and described hydrophilic non-woven;

The ii) at least a nonvolatil basically water-repelling agent that is independent of described hydrophilic non-woven; Perhaps

Iii) i) with ii) combination; And

D) Wetting indicator is arranged between described absorbent cores and the described egative film and keeps liquid to communicate with described absorbent cores, described Wetting indicator comprises at least a response color-forming compositions, make visible change takes place when moistening, preferably, described Wetting indicator also comprises hiding central figure and background graphics, described hiding central figure comprises permanent color-forming compositions and described background graphics comprises described at least a response color-forming compositions, make that described background graphics shows visible change when moistening, cause described hiding central figure to be manifested.

10. disposable absorbent article as claimed in claim 9, described disposable absorbent article also comprises:

A) and described absorbent cores in abutting connection with and be arranged on core covering between described top flat and the described absorbent cores;

B) and described absorbent cores in abutting connection with and be arranged on dustproof covering between described egative film and the described absorbent cores;

C) be arranged on acquisition system between described top flat and the described absorbent cores, or

D) their any combination.

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