CN101083968B - Absorbent articles comprising a slow recovery stretch laminate - Google Patents
Absorbent articles comprising a slow recovery stretch laminate Download PDFInfo
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- CN101083968B CN101083968B CN2005800439662A CN200580043966A CN101083968B CN 101083968 B CN101083968 B CN 101083968B CN 2005800439662 A CN2005800439662 A CN 2005800439662A CN 200580043966 A CN200580043966 A CN 200580043966A CN 101083968 B CN101083968 B CN 101083968B
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Abstract
An absorbent article having at least one stretch zone comprising a slow recovery elastomer wherein said slow recovery elastomer exhibits a normalized unload force of greater than about 0.04 N/mm2 at 37 DEG C; and said slow recovery elastomer exhibits at least about 20% post elongation strain at 22 DEG C after 15 seconds of recovery from a 400% strain. The absorbent article may additionally comprises at least one feature selected from the group consisting of a liquid permeable topsheet, a liquid impermeable backsheet, an absorbent core, an ear, a side panel, a waist feature, a fastener component, a leg cuff, a gasketing cuff, a barrier cuff, and combinations thereof; wherein the feature comprises at least a part of the stretch zone.
Description
Invention field
The present invention relates to comprise the absorbent article of slow recovery stretch laminate, as diaper, training pants, adult incontinence product, feminine hygiene article etc.
Background of invention
Stretch laminate is known in the art.People know already, expect to construct absorption plant with stretch laminate disposable absorbent article field people, as have the disposable diaper, pull-on diaper, training pants, sanitary towel, Pantiliner, incontinence briefs etc. of fastener, with the stickiness of improving the comfortableness in the motion and keeping continuing.In addition, stretch laminate makes diaper can adapt to the wearer of different body sizes.Diaper can have stretch laminate in its many structures, described structure comprises belt, lower limb hoop, lateral plate, elasticated topsheet, egative film, auricle and fastening system.
When using, diaper can be stretched and from its initial basic compactness and relaxed state vertically and/or transverse extension usually.When discharging elongation strain, diaper usually its successfully be applied to the wearer on one's body before or retraction, compression and/or folding before the wearer adjusts on one's body.In traditional gluing diaper, can be present in the lower limb hoop stretch laminate be applied to the wearer may need on one's body the elongation.Yet if do not keep successive power, the stretch laminate in the lower limb hoop can cause diaper to bounce back fast.Usually, the nursing staff need apply successive tensile force to diaper, simultaneously diaper is placed on one's body the wearer, and the wearer that nursing may not too cooperate in using the process of diaper (for example, cry and shout, cry, touch, resistance etc.).The demand of these a plurality of whiles can cause nursing staff's worries.The demand of a plurality of whiles may cause diaper suitably to be applied on one's body the wearer.
Equally, in trousers type goods, can be present in stretch laminate in waist feature or the lateral plate and may need elongation, so that from initial compression and tension amplification waist opening not.In application process, need apply successive power by nursing staff or wearer usually, to offset otherwise the quick retraction of contingent stretch laminate.Leg opening in the trousers type goods mixes stretch laminate usually and also can be tending towards quick retraction, thereby increases the difficulty that goods is pulled upwardly to desired location on wearer's lower body.Applying successive power may be difficult to child with the waist opening of keeping amplification, lacks the muscular strength of the hand and motility because they apply continuous force when wearing medicated underpants.Equally, the old man applies the muscular strength of the hand and the motility that continuous force also lacks necessity when wearing incontinence articles.
In addition, nearest diaper improves acceptance and the storage of being absorbed in feces.In the design of conventional diaper, feces is retained between diaper topsheets and the wearer's skin.The result is that the wearer suffers excess contamination, stimulation and the possible leakage around the lower limb hoop usually.The improvement of diaper design comprises the elasticated topsheet that uses perforate so that feces separates with wearer's skin, thus the seepage of preventing and stimulation.The elasticated topsheet of perforate forms the space between this elasticated topsheet and the diaper structure below it.Stretch laminate links to each other to help keeping elasticated topsheet to contact wearer's skin substantially with elasticated topsheet usually.In addition, stretch laminate helps the location of retaining hole, thereby makes following diaper structure can accept the invasion and attack of feces.
Although elasticated topsheet conceptive be favourable, have the diaper that comprises conventional elastomeric elasticated topsheet and be difficult to usually use.Using diaper needs the nursing staff to stretch diaper so that it is in basic plan-position.During release, the retraction rate of stretch laminate makes that the nursing staff is difficult to diaper is applied on one's body the wearer snugly.This " retraction fast " of elasticated topsheet can increase diaper application to wearer's difficulty on one's body.If diaper is difficult to use, then be tending towards making the hole dislocation.This can cause feces to be deposited on the elasticated topsheet but not pass the hole.The dislocation in hole can destroy and make feces and the isolating beneficial effect of wearer's skin.The embodiment that comprises the diaper of the foraminous elasticated topsheet of tool has been disclosed in the United States Patent (USP) 4,892,536 of authorizing people such as Des Marais and has authorized in the United States Patent (USP) 4,990,147 of Freeland.
Therefore, absorbent article is necessary to be included in the stretch laminate that slowly bounces back when extended state discharges, thereby helps product is correctly used and is fixed on one's body the wearer.
Satisfy stretch laminate when discharging by extended state slowly retraction needs and a problem existing is that stretch laminate is generally heterogeneous material.Stretch laminate can comprise elastic member and relative stiff substrate usually.Elastic component can for example engage by binding agent by bonding technology known in the art with substrate.These combinations of materials are that laminated material just is bound to cause slow recovery just.In addition, forming technique can influence the recovery characteristics of gained stretch laminate.For example, stretching adhesive linkage platen press relate to will the tension elastic component join in the stiff substantially substrate.When adaptability to changes discharged, elastic component bounced back and can make the substrate pinching.The initial strain of elastic component can influence the extendability or the recovery characteristics of stretch laminate.The structure of substrate and basic weight also can influence the recovery characteristics of stretch laminate.
Summary of the invention
In order to address the above problem, the invention provides a kind of absorbent article that comprises following assembly: top flat, the egative film that engages with top flat, place the absorbent cores between top flat and the egative film, one or more goods element that is selected from the group of forming by following elements: anus hoop, elasticated topsheet, fastening system, lower limb hoop, waist elasticity assembly, lateral plate, auricle and their combination.Described goods element can comprise a kind of stretch laminate of slow recovery, described stretch laminate in 37 ℃ show about 0.16N/ (g/m) or bigger off-load power and in 22 ℃ recover 15 seconds after demonstration about 10% or bigger initial strain percentage ratio.
The present invention also provides the slow recovery stretch laminate that comprises at least the first substrate and at least one elastic component.Described first substrate has first surface and second surface, and described elastic component joins on the substrate first surface.Slow recovery stretch laminate in 37 ℃ show about 0.16N/ (g/m) or bigger off-load power and in 22 ℃ recover 15 seconds after demonstration about 10% or bigger initial strain percentage ratio.Slow recovery stretch laminate can be integrated in absorbent article or the curable product.
The present invention also provides and comprises top flat, the egative film that engages with top flat, places the absorbent cores between top flat and the egative film and the absorbent article of slow recovery stretch laminate.Slow recovery stretch laminate comprises that at least one first substrate with first surface and second surface and at least one join the elastic component on the substrate first surface to.Slow recovery stretch laminate in 37 ℃ show about 0.16N/ (g/m) or bigger off-load power and in 22 ℃ recover 15 seconds after demonstration about 10% or bigger initial strain percentage ratio.
The invention provides and comprise top flat, the egative film that engages with top flat, place the absorbent cores between top flat and the egative film and the absorbent article of one or more goods elements.Described goods element is selected from the group of being made up of following material: anus hoop, elasticated topsheet, fastening system, lower limb hoop, waist elasticity assembly, lateral plate, auricle and their combination.The goods element can be included in 37 ℃ of slow recovery stretch laminates that show about 0.16N/ (g/m) or bigger off-load power.When 100% or littler initial strain under when testing, slow recovery stretch laminate shows about 10% or bigger percent strain after recovering 15 seconds in 22 ℃.
Summary of drawings
Figure 1A to 1E is the perspective view of slow recovery stretch laminate embodiment.
Fig. 2 is the top plan view that comprises the diaper of slow recovery stretch laminate.
Fig. 3 A is the top plan view of another embodiment that comprises the diaper of slow recovery stretch laminate.
Fig. 3 B is the perspective view that comprises the diaper of slow recovery stretch laminate as shown in Figure 3A.
Fig. 4 A and 4B are that as shown in Figure 3A diaper is before besmirching and the cross-sectional view that uses afterwards.
Fig. 5 A is the top plan view as another embodiment of the absorbent article of the medicated underpants of not sewing up state.
Fig. 5 B is the perspective view with Fig. 5 A medicated underpants shown in the stitching state.
The present invention describes in detail
Term used herein " absorbent article " but be meant absorbs and/or the application apparatus of receiving fluids.More particularly, absorbent article is meant with wearer's health and is close to or contiguous the placement to absorb and to hold the device of the various exudates that discharged by health.Suitable embodiment comprises diaper, training pants, pull-on garment, adult incontinence products and such as the feminine care of sanitary towel.In addition, " absorbent article " comprise be intended to abandon or do not prepare washing or in other words be no more than use for ten times after, preferably be no more than use for five times after, and no longer preserve " disposable absorbent article " of (although some assembly recyclable, re-use or compost treatment) after most preferably single uses.
Term used herein " stretch laminate " typically refers to the elastomer that is connected at least a material such as polymeric film, non-woven material, woven fabric or the scrim.Elastomer can be connected on the material by any of many adhesive methods known to those skilled in the art.Described adhesive method comprises that binding agent is bonding, hot adhesion, pressure binding, ultrasonic bonding etc.Stretch laminate can extend at least 50% strain usually and can not rupture or break, and can return to its original dimensions substantially after deformation force removes.
Term used herein " laminated material " is meant and comprises two or more layers material.This term comprises stretch laminate and non-stretching laminated material.
Term used herein " diaper " is meant the absorbent article of being worn around lower body by baby and incontinent person usually.
Term used herein " substrate " is meant and is laminated on the elastic component to form the material of stretch laminate.Suitable substrate comprises non-woven webs, woven fleece, knit goods, thin film, film laminate, perforated film, nonwoven laminates, sponge, foam, scrim and their any combination.Suitable substrate can comprise natural material, synthetic material or their any combination.
Term used herein " vertically " typically refers to the direction parallel with the longitudinal axis of goods, and comprises the direction in vertical 45 ° of scopes.
" length " of term goods used herein or its assembly typically refers to the size/distance of the maximum linear dimension of goods or its parts, perhaps typically is meant the size/distance of longitudinal axis.
Term used herein " side direction " or " laterally " are meant the direction that is orthogonal to usually vertically and is parallel to axis of pitch.
" width " of term goods used herein or its assembly be meant be orthogonal to goods or its assembly vertically (for example, be orthogonal to the length of goods or its assembly) the size/distance of size, and it typically is meant the distance/size of the size of the axis of pitch that is parallel to goods or assembly.
Term used herein " attached " comprises by element directly being attached on other element and this element directly is fixed to configuration on another element.
Term used herein " joint " or " connection " comprise wherein by first element is directly pasted makes first element directly be fixed to configuration on second element on second element, and by with first component affixing on intermediary element, intermediary element pastes then on second element and makes first element be fixed to configuration on second element indirectly." joint " or " connection " element can be pasted continuously or intermittently.
" relaxing " used herein or " relaxed state " are meant the state that does not have power to be applied to (except naturally occurring power such as gravity) on the goods.
Term used herein " extendability " and " ductile ", for example elastomeric extendability is meant the element width that is in slack position and length is extensible or increase.
" elastification " used herein or " but elastification " is finger assembly comprises at least a portion of being made by elastomeric material.
Term used herein " elastic ", " elastomer " and " elastomeric " are meant and can extend at least 50% strain usually and can not rupture or break, and can return to the material of its original dimensions substantially after deformation force removes.
Term used herein " curable product " is meant operation dress and surgical drage, face shield, headgear, shoe cover, wound dressing, binder and sterilization wrappage, and is as United States Patent (USP) 5,540, disclosed in 976.
Term used herein " copolymer " is meant by the synthetic polymer of two or more monomers with different chemical structures.
Term used herein " temperature-responsive " and " temperature-responsive " are meant slow recovery stretch laminate through after the specified time period, strain after ratio shows less elongation at a lower temperature under higher temperature.
Term used herein " conventional stretch laminate " be meant as extend the back recover test measured, in 22 ℃ of stretch laminates that show minimum initial strain percentage ratio after recovering 15 seconds.As extending the back, to recover test measured, and conventional stretch laminate is in 22 ℃ of initial strain percentage ratios that show after recovering 15 seconds less than 10%.
Term used herein " initial strain percentage ratio " is meant as extending the back and recovers the initial strain percentage ratio that keeps after test a period of time measured, after being discharged by initial strain." initial strain percentage ratio " calculates divided by the initial percentage strain by using by the percent strain of initial strain release back during preset time; The gained merchant be multiply by 100 obtain percentage ratio.
Absorbent article of the present invention comprises slow recovery stretch laminate (SRSL).SRSL can be used in the absorbent article of elasticity of demand performance wherein.SRSL generally includes and joins suprabasil elastic component to.SRSL can disperse and form and engage with absorbent article.Otherwise SRSL can be in aggregates with absorbent article (for example, elastic component joins on existing substrate in the absorbent article such as the top flat to form stretch laminate).Elastic component can be made by the compositions that comprises a kind of elastomer polymer, optional at least a modified resin and optional one or more additives.When by following two circulation hysteresis thermometricallies, SRSL is in the normalization off-load power of 37 ℃ of demonstrations at least about 0.16N/ (g/m).It is measured to recover test after the elongation as mentioned below, and SRSL shows about 10% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.
In another embodiment of the invention, SRSL can be incorporated in curable product such as operation dress, face shield, headgear, shoe cover, wound dressing, binder or the sterilization wrappage.SRSL can be used in the curable product of elasticity of demand characteristic location.
Shown in Figure 1A to 1E, SRSL 10 generally includes the elastic component 12 that joins in the substrate 14.Elastic component 12 can be undertaken by multiple adhesive method with engaging of substrate 14.Described method comprises for example heat bonding, pressure binding, ultrasonic bonding, mechanical adhesion, binding agent is bonding or the combination of any other suitable method of attachment known in the art or these methods of attachment.In certain embodiments, elastic component 12 can show that enough cohesivenesses are to engage elastic component 12 and substrate 14.
Figure 1A to 1E has described several suitable embodiment of SRSL 10.Figure 1A has described the SRSL 10 of the elastic component 12 with one or more belts that engage with substrate 14 or ribbon form.Figure 1B has described the SRSL 10 with the flap elastic member 12 that engages with sheet form base 14.Elastic component 12 and substrate 14 are shown as and are connected.Yet arbitrary layer also can have the size that is different from another layer.Fig. 1 C has described the SRSL 10 of the elastic component 12 with one or more strand forms that engage with substrate 14.
Fig. 1 D has described the SRSL 10 of the elastic component with one or more crosshatch spread patterns that engage with substrate 14.Crosshatch is arranged can be by forming a plurality of elastic component 12a joined in parallel in one embodiment to substrate 14.But more than second elastic component 12b joined in parallel is to substrate.More than second 12b can join on more than first 12a by non-parallel configuration.Crosshatch is arranged also and can be formed by the hot needle point method of elastomer thin film.Crosshatch is arranged also can be formed at the expansible 3 d elastic body fleece of porous macroscopic view, described in U.S. Patent Application Publication 2004/0013852.How this announcement has been described by forming thin film on the porous shaped structure and applying fluid pressure difference along the thickness of thin film and has been realized that crosshatch arranges.Fluid pressure difference makes thin film conform to supporting construction and breaks, and arranges thereby produce crosshatch.Fig. 1 E has described the SRSL 10 with one or more elastic components 12, and described elastic component joins in two or more substrates: the first substrate 14a and the second substrate 14b.The concrete order that SRSL is 10 layers can change.Yet, in described embodiment, elastic component 12 be arranged between the first substrate 14a and the second substrate 14b and can be bonded to one of substrate or two substrates on.First substrate and the second substrate 14a, 14b can comprise identical materials or can comprise diverse material.
The technology that forms stretch laminate is known in the art, and these technology can be suitable for forming SRSL 10 of the present invention.The technology that is used to form stretch laminate of a kind of being commonly referred to " stretch-bonded " relates to when elastic component is in the stretching configuration elastic component such as elastic strands, belt, ribbon, thin film etc. is joined in the substrate.Usually, elastic component can be stretched at least 25% of its relaxed length.Behind the joint, elastic component can relax, thus pinching substrate and form stretch laminate.
Another technology that is used to form stretch laminate that is commonly referred to " constriction is bonding " relates to when base extension and drawing-down elastic component is bonded in the substrate.In certain embodiments, substrate can be non-resilient substrate.The embodiment of the bonding laminated material of constriction is described in United States Patent (USP) 5,226, in 992,4,981,747,4,965,122 and 5,336,545.The variant of " constriction is bonding " is " a neck stretch-bonded ".The neck stretch-bonded is meant when base extension and drawing-down and elastic component extension elastic component is bonded in the substrate.The embodiment of neck stretch-bonded laminating is described in United States Patent (USP) 5,114, in 781 and 5,116,662.
In forming another technology of stretch laminate, elastic component configuration or the part configuration that stretches that can relax is connected in the substrate.Can make gained laminated material can stretch (perhaps part stretch easier stretching under strand or the thin film situation) by making laminated material stand the elongation method.Described elongation method permanently prolongs substrate, but can only prolong elastic component temporarily.This method known in the art be " zero strain " stretch laminate forming method, and available suitable components of the elongation of this laminated material such as realizations such as roller, engaging tooth.The formation of the embodiment of zero strain activation method and gained stretch laminate is described in United States Patent (USP) 5,167, in 897 and 5,156,793.
The alternative technology that is used to form stretch laminate is disclosed among U.S. Patent Application Publication 2003/0088228A1,2003/0091807A1 and the 2004/0222553A1.The technology that is disclosed in these announcements relates to following formation elastic component: one or more thermoplastic elastomer (TPE) heat fusings are coated in the substrate, and the stretching that increases substrate subsequently gradually makes elastomeric tensile properties give to substrate.Suitable coating method comprises for example directly intaglio printing, flexographic printing and flexographic printing.In these methods each makes a certain amount of elastomer with Any shape and direction deposition, thereby provides basic pliability in the tensile properties that stretch laminate shows.Other conventional method that is used for stretch laminate formation is also in the scope of this description.
In one embodiment, elastomer polymer can be block copolymer.Can utilize many block copolymers that comprise segmented copolymer, tapered block copolymer and star block copolymer.Usually, be applicable to that block copolymer of the present invention can show elasticity and thermoplastic characteristics simultaneously.In this block copolymer, hard block (or fragment) can have greater than about 25 ℃ glass transition temperature (Tg), perhaps for having the crystallization that is higher than about 25 ℃ melt temperature (Tm) or hemicrystalline.Preferably, hard block has greater than about 35 ℃ Tg, perhaps for having the crystallization that is higher than about 35 ℃ Tm or hemicrystalline.The hard block part is typically derived from the vinyl monomer that comprises vinyl-arene such as styrene and α-Jia Jibenyixi or their combination.
Glass transition temperature as referred to herein is measured by the tension force dynamic mechanical analysis that uses temperature-raising method to carry out in the linear elastic region of material with the frequency of 1Hz.Film sample with about 0.3mm uniform thickness can be used for about 1 ℃/min or slower heating rate aptly.Tan δ peak temperature is considered to the Tg of concrete material or phase.
Crystalline melt temperature as referred to herein is measured by the differential scanning calorimetry of the heating rate of 10 ℃/min of use.Fusion endothermic peak temperature is considered to the Tm of concrete crystal region.
Block copolymer can comprise soft segment (or fragment).Soft segment shows enough low glass transition temperature and/or melt temperature usually, thereby can not form glass zone or crystal region under the serviceability temperature of copolymer.In one embodiment, serviceability temperature can be between about room temperature (about 22 ℃) and about body temperature (about 37 ℃).Yet other serviceability temperature also is feasible and belongs to scope of the present invention.This soft segment is usually incompatible with hard block physics and form independent zone, field or mutually.
Soft segment partly can be derived from any conjugated aliphatic polymer of monomers.Typically, the monomer that is used for synthetic soft segment comprises and is less than about 6 carbon atoms.Suitable diene monomers comprises butadiene, isoprene etc.Especially preferred soft segment polymer comprises poly-(butadiene) and poly-(isoprene).In addition, can imagine that soft segment can be modified to adapt to the Tg of soft segment.For example, can use the grafting on poly-(isoprene) of isoprene and cinnamic random copolymer or styrene.In this case, can use the modified resin of lower content.
Be used for suitable block copolymers of the present invention and can comprise at least one hard block (A) and at least one soft segment (B).Block copolymer can have a plurality of blocks.In preferred embodiments, block copolymer can be A-B-A triblock copolymer, A-B-A-B Tetrablock copolymer or A-B-A-B-A five block copolymers.In addition, can be used for of the present invention is the triblock copolymer with end block A and A ', and wherein A can be derived from different vinyl compounds with A '.In addition, can be used for of the present invention is the block copolymer with an above hard block and/or an above soft segment, and wherein each hard block can be derived from identical or different monomer derived from identical or different monomer and each soft segment.Should be noted that in comprising the copolymer of remaining olefinic double bond partly or entirely hydrogenation of copolymer if desired.Saturated generation beneficial effect aspect the elastic performance of copolymer usually.
In suitable embodiment, elastomer polymer comprises styrene-alkene-styrene triblock copolymer such as s-B-S (S-B-S), styrene-ethylene/butylene-styrene (S-EB-S), styrene-ethylene/propylene-styrene (S-EP-S), styrene-isoprene-phenylethene (S-I-S), hydrogenant polystyrene-isoprene/butadiene-styrene (S-EEP-S) and their mixture.Block copolymer can adopt separately or adopt with the blend of block copolymer.
In specific embodiments, elastomer polymer comprises s-B-S (S-B-S) and styrene-isoprene-phenylethene (S-I-S) block copolymer.This linear block copolymers of s-B-S (S-B-S) and styrene-isoprene-phenylethene (S-I-S) is commercially available in Dexco Polymers L.P. with commodity name Vector, Houston, TX and by KratonPolymers, Houston, TX sells with commodity name Kraton.
Can be used for suitable modified resin of the present invention and can have about 60 ℃ to about 180 ℃, more preferably from about 70 ℃ to about 150 ℃, and more preferably from about 90 ℃ to about 130 ℃ glass transition temperature.
Suitable modified resin can combine with soft segment.Solubility parameter is used to determine whether modified resin will mix mutually with the soft segment of block copolymer.Usually, select modified resin to make the solubility parameter of described modified resin be similar to the solubility parameter of soft segment phase.For example at the about 8 (cal/cm of the solubility parameter of soft segment phase
3)
1/2Situation under, the solubility parameter of modified resin can be about 7.5 (cal/cm
3)
1/2To about 8.5 (cal/cm
3)
1/2The solubility parameter of modified resin also can be near the dissolubility of hard block.Yet as long as modified resin mixes mutually with soft segment, hard block does not mix mutually and should be restricted.Be used for common polymer or dissolving resin degree parameter list, and be used to measure or estimate that the method for solubility parameter is found in " Polymer Handbook ", the third edition; Wiley Interscience; The VII part, the 519th to 559 page.
Can be used for modified resin of the present invention and include but not limited to unhydrided C5 hydrocarbon resin or C9 hydrocarbon resin, partial hydrogenation and whole hydrogenant C5 hydrocarbon resin or C9 hydrocarbon resin; Alicyclic resin; Terpene resin; Polystyrene and styrene oligomer; Poly-(t-butyl styrene) or its oligomer; Colophonium and rosin derivative; The benzofuran indenes; Dicyclopentadiene and oligomer thereof; Polymethylstyrene or its oligomer; Phenolic resins; Indene polymer, oligomer and copolymer; Acrylate and methacrylate ester oligomer, polymer or copolymer; Their derivant; And their combination.Preferably, resin is selected from the group of being made up of following material: derived from t-butyl styrene, cyclopentadiene, isobornyl methacrylate, methylmethacrylate, methacrylate isobutyl ester, indenes, benzofuran, vinyl cyclohexane, methyl styrene and 3,3, oligomer, polymer and/or the copolymer of 5-trimethylcyclohexyl methacrylate.Preferred modified resin also comprises alicyclic terpenes, hydrocarbon resin, alicyclic resin, poly--nopinene, terpene phenolic resin and their combination." C5 hydrocarbon resin " and " C9 hydrocarbon resin " are disclosed in United States Patent (USP) 6,310, in 154.
Multiple stabilizing agent and antioxidant are known in the art and comprise high-molecular weight hindered phenol (promptly, near the phenolic compound that has the huge free radical in space hydroxyl), multifunctional phenol (that is the phenolic compound that, has the group that comprises sulfur and phosphorus), phosphate ester are as three-(to the nonyl phenyl)-phosphite ester, resistance amine and their combination.Comprise multiple Wingstay
, Tinuvin
And Irganox
The proprietary commercial stabilizers and/or the antioxidant of product are buied with many trade names.
Other optional additive comprises hard block or relevant thermoplastic polymer or the thermoplastic polymer batch mixing of segment preferred and block copolymer.Be not bound by theory, it is believed that these thermoplastic polymers are incorporated in the winding three-dimensional net structure of hard phase.The network structure of this winding can provide tension force, elasticity and the stress relaxation characteristic of the elastic composition of improvement.When elastomer polymer comprises styrene block copolymer, thermoplastic polymer additive such as polyoxygenated dimethylbenzene and can be used among the present invention derived from the monomeric aromatic ethylene polymer, other alkyl phenylethylene derivative, vinyltoluene and their mixture that comprise styrene, α-Jia Jibenyixi, p-methylstyrene, this is because they are considered to compatible with the styrene hard block chemistry of block copolymer usually.
Multiple coloring agent and additive are known in the art and can be used as additive and be included in the compositions that forms elastic component 12.Coloring agent can comprise dyestuff and pigment such as titanium dioxide.Filler can comprise the material such as Talcum and clay.Other additive can comprise dyestuff, UV absorbent, odor control agent, spice, filler, desiccant etc.
Available suitable substrates 14 comprises non-woven webs, woven fleece, knit goods, thin film, film laminate, perforated film, nonwoven laminates, sponge, foam, scrim and their any combination.Suitable substrate can comprise natural material, synthetic material or their any combination.In order to be used for absorbent article and to be particularly useful for products such as diaper, it is submissive, soft feel and non-stimulated to wearer's skin that substrate 14 is generally.In certain embodiments, substrate 14 can comprise non-woven webs such as spun-bonded fibre net, meltblown fiber web, carding fiber net and their combination (for example, spunbond-melt and spray complex and variant).
The size of substrate 14 is subjected to slowly to recover the essential end-use control of elastic laminate material 10 usually.
Conventional stretch laminate (that is, for example be present in usually in the absorbent article that comprises diaper those) in 22 ℃ show minimum elongation after recovering 15 seconds after strain.Say that qualitatively the stretch laminate of routine shows " retraction fast " (that is, more promptly bouncing back) after extended state discharges.As a comparison, as extending the back, to recover test measured, and SRSL 10 of the present invention shows about 10% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.In other embodiments, SRSL 10 shows about 20% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.In other suitable embodiment, SRSL 10 shows about 30% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.In other suitable embodiment, SRSL 10 shows about 40% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.
In addition, SRSL 10 of the present invention shows specified initial strain percentage ratio in 22 ℃ of recoveries after 30 seconds, 60 seconds or three minutes.In certain embodiments, SRSL 10 shows about 10% or bigger initial strain percentage ratio after recovering 30 seconds in 22 ℃.Alternatively, SRSL 10 shows about 15% or bigger initial strain percentage ratio after recovering 30 seconds in 22 ℃.In other embodiments, SRSL 10 shows about 10% or bigger initial strain percentage ratio after recovering 60 seconds in 22 ℃.
But SRSL 10 displays temperature responses.In certain embodiments, SRSL 10 recovers the initial strain percentage ratio that shows after the time of specified amounts less than in 22 ℃ of initial strain percentage ratios after recovering identical time in 32 ℃.In one embodiment, compare with the initial strain percentage ratio that shows after recovering 15 seconds in 22 ℃, temperature-responsive SRSL 10 can show the minimizing (that is, [in the initial strain percentage ratio of 22 ℃ of recoveries after 15 seconds]-[in the initial strain percentage ratio of 32 ℃ of recoveries after 15 seconds]) of initial strain percentage ratio after 15 seconds in 32 ℃ of recoveries.In some embodiments, this difference is equal to or greater than 5%.In other embodiments, SRSL 10 is shown in 32 ℃ and recovers after 15 seconds to be equal to or greater than 10%, 20%, 30% or alternatively 40% with difference in 22 ℃ of initial strain percentage ratios after recovering 15 seconds.The SRSL 10 that it is believed that the displays temperature response also can help diaper application.When (that is, in the time of about 22 ℃) uses diaper under about room temperature, SRSL 10 can show higher initial strain percentage ratio in the official hour section, and it makes nursing staff or wearer can use diaper.When using diaper, the temperature of SRSL 10 will raise owing to its skin that closely contacts the wearer.Along with the temperature increase of SRSL 10 and near skin temperature (that is, about 32 ℃), initial strain percentage ratio reduces.Temperature-responsive allows that diaper uses under the situation of not having " retraction fast ", recover after the application of increase is provided simultaneously.
In following embodiment, absorbent article is the form of diaper 20.SRSL of the present invention can be used for the wherein described embodiment of elasticity of demand material.Will be appreciated that diaper 20 can comprise one or more SRSL and one or more conventional stretch laminates.Fig. 2 illustrates tensile with top plan view and is in the diaper 20 of basic flat state.Show the surface (that is, towards the wearer surface) of the diaper 20 of contiguous wearer's setting.The some parts of diaper 20 is cut more to clearly illustrate fabric.An end of diaper 20 can be configured as first lumbar region 36 of diaper 20.Relative end can be configured as a second waist region of the diaper 20 38.The mid portion of diaper 20 can be configured as crotch district 37, and it is longitudinal extension between first lumbar region 36 and second lumbar region 38.Crotch district 37 is that diaper 20 is usually located at that part between wearer's two lower limbs when using diaper 20.Lumbar region 36 and 38 can comprise when using diaper 20 those lumbar region parts around waist usually.Lumbar region 36 and 38 can comprise following element: but its pinching around wearer's waist with stickiness that improvement is provided and the property held, perhaps its typically pinching around waist and fastening system fastening that can be by use such as protuberance 27 (it can be fastened on the touch-down zone 29) around waist.
Suitable top flat 24 can be by large-scale material manufacture, as the combination of woven fabric or non-woven material (for example wood fiber or cotton fiber), synthetic fibers (for example polyester fiber or polypropylene fiber) or the natural fiber and the synthetic fibers of porous foam, reticulated foams, apertured plastic films or natural fiber.If top flat comprises fiber, then this fiber can be by spunbond, carding, wet-laying, melt and spray, water thorn or in other words method known in the art processing.A kind of suitable top flat 24 be with name P10 or 055SLPI09E available from BBA Fiberweb, Old Hickory, the spunbond polypropylene fiber net of the hydrophilic treated of TN.Suitable formed film top flat 24 is described in United States Patent (USP) 3,929,135; 4,324,246; 4,342,314; In 4,463,045 and 5,006,394.Other suitable top flat 24 can be according to United States Patent (USP) 4,609, and 518 and 4,629,643 make.Exemplary shaping membrane comprises all from TredegarCorporation, Richmond, " DRI-WEAVE " of VA and " CLIFF-T ".
In certain embodiments, at least a portion of top flat 24 can comprise hydrophobic material or can be processed into hydrophobic so that wearer's skin be contained in fluid separation applications in the absorbent cores 28.As described below, hydrophobicity can for example be used the Repellan ZN of fluorobenzene, paraffin or siloxy group chemical compound such as Cognis Corporation, hydrophobic surface coated (described in U. S. application 11/055743) or hydrophobic lotions compositions by removing the hydrophilicity-imparting treatment step and/or top flat 24 is carried out hydrophobic treatment realize from production technology.If top flat 24 is made by hydrophobic material, it is hydrophilic to expect that then at least a portion that it is surperficial is processed into, and makes liquid more promptly to shift by top flat.Can make top flat 24 possess hydrophilic properties in the top flat by being attached to the surfactant processing or with surfactant.The appropriate method of handling top flat 24 with surfactant comprise with the surfactant sprayed on material and/or with material soaking in surfactant.This processing and hydrophilic more going through are included in United States Patent (USP) 4,988, in 344 and 4,988,345.Some are found in more the going through of appropriate method that surfactant is attached in the top flat among the United States statutory invention registration H1670 that authorizes people such as Aziz that announced on July 1st, 1997.Alternatively, top flat 24 can comprise hydrophobic porous fibre net or porous membrane.In this embodiment, the hole is enough big to be preferred so that can not be subjected to obviously to hinder the ground infiltration such as the aqueous fluid of urine.
Can coat lotion known in the art in any part of top flat 24.The embodiment of suitable lotion comprises and is described in United States Patent (USP) 5,607,760; 5,609,587; 5,635,191; In 5,643,588 and 5,968,025 those.Lotion can use separately or be used in combination with another kind of reagent (as above-mentioned hydrophobization inorganic agent).Top flat also can comprise antibacterial or handle with antibacterial, as disclosed among the United States statutory invention registration H1732 that authorizes Johnson that announced on June 2nd, 1998.In addition, any part of top flat 24, egative film 26 or described top flat or egative film can be handled so that the outward appearance that more is similar to cloth to be provided through embossing and/or matte finish.
Egative film 26 is generally the diaper 20 that is provided with towards garment surface that part of of contiguous absorbent cores 28, and it can stop the exudate that absorbs in it and hold make dirty the goods of touching diaper 20, for example sheet and underwear.In certain embodiments, egative film 26 is liquid (for example urine) impermeable, and comprises that thin plastic sheeting is as having the extremely thermoplastic film of about 0.051mm (2.0mil) thickness of about 0.012mm (0.5mil).Suitable backsheet film comprises the Corporation by Tredegar, those that Richmond, VA make and sell with trade name CPC2 thin film.Other suitable stock footage can comprise that allowing water vapour to overflow from diaper 20 prevents also that simultaneously exudate from passing through the gas permeable material of egative film 26.The non-woven webs of material that exemplary gas permeable material can comprise such as woven fleece, non-woven webs, composite such as film coating, microporous membrane such as Mitsui Toatsu Co., that Japan makes with name ESPOIRNO and by Tredegar Corporation, Richmond, that VA makes and sells with name EXAIRE., monolithic thin film is as by Clopay Corporation, Cincinnati, OH makes with name HYTREL blend P18-3097.Some breathable composite materials are described in greater detail in PCT application WO 95/16746; United States Patent (USP) 5,938,648; In 5,865,823 and 5,571,096.
Can adopt any link known in the art that egative film 26 is joined on top flat 24, absorbent cores 28 and/or any other element of diaper 20.For example, link can comprise even successive adhesive phase, the adhesive phase that becomes pattern or the array of isolating adhesive line, helix or point.A kind of preferred link comprises the open patterns network of adhesive filaments, and is as United States Patent (USP) 4,573, disclosed in 986.Other suitable link comprises that some are coiled into the adhesive filaments line of spiral pattern, as United States Patent (USP) 3,911,173; 4,785,996 and 4,842, illustrate illustrated in equipment shown in 666 and the method.Found satisfied binding agent by H.B.Fuller Company, St.Paul, Minnesota make and sell with trade name HL-1620 and HL-1358-XZP.Alternatively, method of attachment can comprise heat bonding, pressure binding, ultrasound wave is bonding, dynamic mechanically is bonding or the combination of any other suitable method of attachment or these methods of attachment known in the art.
The configuration of absorbent cores 28 and structure can change also that (for example, absorbent cores or other absorbing structure can have the caliper zones, hydrophilic gradient, super absorption gradient of variation or than low average density with than the low average basis weight acquisition zone; Perhaps can comprise one or more layers or structure).The exemplary absorbent structrual description that is used as absorbent cores 28 is in United States Patent (USP) 4,610,678; 4,673,402; 4,834,735; 4,888,231; 5,137,537; 5,147,345; 5,342,338; 5,260,345; In 5,387,207 and 5,625,222.
Lining ring hoop 82 can be stiff substantially or but elasticity extends on the lower limb that dynamically is fitted in the wearer.Lining ring hoop 82 can operationally join top flat 24, egative film 26 or any other to by one or more elastic components 83 and be used to form on the suitable substrates of diaper 20 and form.In a suitable embodiment, lining ring hoop 82 has a plurality of elastic components 83 that are bonded between egative film 26 and the top flat 24.Elastic component 83 can be to lining ring hoop 82 elastic elastomeric material is provided, and can comprise SRSL of the present invention.
Hindering hoop 84 can form by the wing 85 and elastic component 86.The wing 85 can be any current material of formation diaper 20 or the continuous extension of element.For example, the wing 85 can be a part that is processed into hydrophobic top flat 24, and perhaps the wing 85 can be the discrete elements that is connected to separately on the diaper 20.Elastic component 86 can be to hindering hoop 84 elastic elastomeric material is provided, and can comprise SRSL of the present invention.Expectation elastic component 86 shows enough elasticity, makes that hindering hoop can keep in touch with the wearer during normal use, thereby strengthens the obstruction performance that hinders hoop 84.United States Patent (USP) 4,808,178 and 4,909,803 have described the disposable diaper with the obstruction hoop that improves the leg area property held.
As mentioned above, lower limb hoop 82,84 can be used all or part of processing of lotion.The lower limb hoop also can be configured to multiple different configuration, comprises being described in United States Patent (USP) 4,636,207; 4,704,115; 4,900,317; 5,085,654; 5,492,751; 6,476,288 and SIR H1630 in those.Any lower limb hoop disclosed herein and other absorbent article assembly can see the U. S. application of submitting on February 10th, 2,005 11/055,743 for details with hydrophobic surface coated all or part of coating.
Some embodiments also can comprise the pocket that is used for receiving and holding refuse, the interval insulant that the refuse space is provided, restriction refuse at barrier that goods move, receive and hold the compartment that is deposited on the waste materials in the diaper 20 or space etc., or their any combination.Be used to absorb the pocket of product and the embodiment of interval insulant is described in United States Patent (USP) 5,514,121; 5,171,236; 5,397,318; 5,540,671; 6,168,584; In 5,306,266 and 5,997,520.The embodiment in compartment or space is disclosed in United States Patent (USP) 4,968,312; 4,990,147; In 5,062,840 and 5,269,755.The embodiment of suitable transverse barrier is described in United States Patent (USP) 5,554,142; In WO 94/14395 and the United States Patent (USP) 5,653,703.Other embodiment that is particularly suited for handling the structure of low viscosity fecal material pass is disclosed in United States Patent (USP) 5,941,864; In 5,977,430 and 6,013,063.
SRSL is attached to other suitable embodiment in the absorbent article to be comprised and utilizes SRSL to form stretch zones, as the common unsettled U. S. application submitted on June 3rd, 2005 with people's such as McKiernan name _ _ _ _ disclosed in (attorney docket 9869M), this application requires the priority of the U.S. Provisional Application 60/643,920 of submission on January 10th, 2005.
Fig. 3 A illustrates tensile with top plan view and is in the diaper 20 of basic flat state.Show the surface (that is, towards the wearer surface) of the diaper 20 of contiguous wearer's setting.The some parts of diaper 20 is cut more to clearly illustrate fabric.In this embodiment, diaper shows two top flats, the elasticated topsheet 24a and the second top flat 24b.The second top flat 24b can extend on the width of diaper 20 and can be close to placing towards the wearer surface of absorbent cores 28.Can use the second top flat 24b to make that the feces infringement can be relevant with absorbent cores 28 sharply.Usually in the diaper that comprises two top flats, the second top flat 24b is the top flat towards garment surface near diaper 20, and elasticated topsheet 24a approaching face is to the wearer surface.The second top flat 24b can join on core 28 and/or the egative film 26 by any link known in the art.The suitable link that is used to engage top flat 24a and 24b is identical with those parts that egative film 26 is joined on other element of diaper 20 of being used for as described below.In one embodiment of the invention, top flat 24a and 24b and egative film 26 are bonded together along their longitudinal edge 70 and transverse edges 72 separately.Elasticated topsheet 24a can engage along one or more its longitudinal edges 70 or transverse edge 72 with the second top flat 24b, rather than engages along the major part of its contact plane.In certain embodiments, the second top flat 24b is free of attachment on the core 28.
It is permeable that the second top flat 24b can be liquid, thereby allow that liquid is easy to permeate its thickness.Elasticated topsheet 24a can be hydrophobic, so that the liquid that is included in the absorbent cores 28 is separated with wearer's skin.
Top flat 24a and 24b can be by as above making about top flat 24 described large-scale materials.In certain embodiments, as above described about top flat 24, the second top flat 24b and/or elasticated topsheet 24a can comprise hydrophobic material or can be processed into hydrophobic so that skin that makes the wearer and the fluid separation applications that is included in the absorbent cores 28.If necessary, top flat 24a and 24b can be as above about top flat 24 described comprise water wetted material or it is become hydrophilic.As above described about top flat 24, top flat 24a and 24b can be coated with lotion as known in the art.In addition, top flat 24a and 24b and egative film 26 can be handled so that the outward appearance that more is similar to cloth to be provided through all or part of embossing and/or matte finish.
Fig. 3 B shows the perspective view of diaper 20 among Fig. 3 A.It is folding 88 that elasticated topsheet 24a can comprise, its expansion when for example being applied on the elasticated topsheet 24a less than the less power of about 1N.Folding 88 can make elasticated topsheet 24a extend during using.For example, when becoming more and more heavier and beginning downward sagging after the second top flat 24b, egative film 26 and core 28 are receiving bodily exudate, folding 88 can stretch, thereby make elasticated topsheet 24a extend and remain on closely position near wearer's skin.In addition, along with elasticated topsheet 24a is connected or does not connect with the limited of core 28, when core 28 is drawn downwards owing to the weight of the exudate that is received by diaper 20 with egative film 26, elasticated topsheet 24a and slit opening 30 can be automatically along with core do not move, but keep the skin of lies closest or closely near the wearer.It is believed that by making to move to minimize or stop mobilely that slit opening 30 will can significantly not increase on lateral dimensions; Thereby minimize possible contact skin with fecal materials.
Fig. 4 A to 4B is the cross-sectional view along the diaper 20 of the transversal intercepting of being appointed as y (being axis of pitch) among Fig. 3 A.Wearer 92 uses diaper 20, makes elasticated topsheet 24a and elastic construction 31,32 closely near wearer 92.Location longitudinal edge 40 makes slit opening 30 place so that accept the feces invasion and attack along gluteal fold 94.Longitudinal edge 40 can be about gluteal fold 94 location, so that prevent the infringement of feces on elasticated topsheet 24a with the position of slit opening 30.Fig. 4 A shows and receives exudate diaper before.In Fig. 4 B, diaper 20 has the bodily exudate 96 of reception.Exudate 96 has passed slit opening 30, enters void space 75, and is deposited on the second top flat 24b.The second top flat 24b, core 28 and the egative film 26 that has the load of this increase at present can move down (that is, showing sagging) on the Z-direction.Yet elastic construction 31,32 and slit opening 30 are not mobile substantially from the original position shown in Fig. 4 A.Be present in folding and expanding among the elasticated topsheet 24a (that is, outwards stretch or stretch) and remedy egative film 26, core 28 and second extension of top flat 24b on downward direction.
In other embodiments, the elasticated topsheet 24a and the second top flat 24b all can comprise stretch laminate of the present invention.In other embodiments, diaper 20 can be taked multiple other form and the structure in the explanation of example shown in the following patent: U.S. Patent application 10/764,939 (U.S. announces US 2004/0193134 A1); United States Patent (USP) 6,482,191; U.S. Patent application 10/764,850 (U.S. announces US 2004/0162538 A1); U.S. Patent application 10/703,239 (U.S. announces US2004/0092902 A1) and U.S. Patent application 10/703,233 (U.S. announces US 2004/0092900A1).SRSL of the present invention can replace Hookean region, belt or member, as disclosed in the application reference.
In alternative embodiment, diaper can carry out preform to form medicated underpants by manufacturer.Medicated underpants typically refers to the disposable garment with waist opening and leg opening, and described clothes is baby or adult wearer design.Medicated underpants is also referred to as " closed diapers ", " prefastened diapers ", " pull-on diaper ", " training pants " and " diaper pants " usually.Insert leg opening and make medicated underpants slip into position around wearer's lower body by the shank that makes the wearer medicated underpants is applied on one's body the wearer suitably.Exemplary medicated underpants 520 is shown among Fig. 5 A to 5B.Medicated underpants 520 is not sewed up state for the plane in Fig. 5 a, wherein towards the wearer surface towards the observer, and shown in the perspective view of Fig. 5 b, sew up.Medicated underpants 520 can comprise diaper components identical among many and Fig. 2 to 4.An end of medicated underpants 520 can be configured as first lumbar region 536.Relative end can be configured as second lumbar region 538.The mid portion of medicated underpants 520 can be configured as crotch district 537, and it is longitudinal extension between first lumbar region 536 and second lumbar region 538.
Medicated underpants can join on second lumbar region 538 lumbar region 536 of winning to by preform, thereby forms a waist opening and a pair of leg opening.Can lateral plate 548 relative in first lumbar region 536 be joined to by the seam shown in Fig. 5 b 595 and make medicated underpants 520 preforms on the lateral plate 548 relative in second lumbar region 538.Seam 595 can form by any suitable adhesive bonding method that is suitable for concrete material therefor known in the art.For example, suitable adhesive bonding method can comprise that ultrasonic sealing, heat seal, pressure binding, binding agent are bonding, stitching, autogenous bonding etc.Seam 595 can be nonvolatil.In other words, they can be bonded make the separation of the relative lateral plate 548 that engaged need breaking of jointing material or other destructive manipulation, thereby prevent the fastening once more of side 548.Alternatively, seam 595 can be refastenable, makes it can be repeated to open and fastening once more.The seam of refastenable can comprise shackle fastener etc.Suitable medicated underpants is disclosed in United States Patent (USP) 5,246,433; 5,569,234; 6,120,487; 6,120,489; 4,940,464; 5,092,861; 5,897,545; 5,957,908 and U.S. Patent application series 10/171,249 in.
Another embodiment of the invention relates to any method of absorbent article as mentioned above of using.Absorbent article can offer the nursing staff and be used to be applied on one's body the wearer.Absorbent article can be compact condition, makes to comprise that the stretch laminate of SRSL is in lax, unstrained substantially state.Nursing staff's absorbent article that can stretch, thus launch and strain described stretch laminate.Goods are stretched usually in order to using.Absorbent article can be kept the elongated state of functionalization and reach effective a period of time.In one embodiment, goods can be applied to these goods the wearer the nursing staff and keep elongated state in the necessary enough time on one's body.When diaper discharges after stretching, this diaper usually its can successfully be applied to the wearer on one's body before retraction and/or folding.In one embodiment, SRSL is presented at when recovering after 15 seconds 22 ℃ the initial strain percentage ratio more than or equal to 10%.After the application, goods can continue retraction so that warm ideal stickiness is provided.Can repeat this method when goods are besmirched during using.
In another embodiment, a plurality of absorbent article as disclosed above can be packaged in the external member.Usually, external member makes a certain amount of absorbent article be delivered to consumer and is bought by consumer, saves the space simultaneously and simplifies transportation and storage.External member may need to open, and making that goods become can be near (for example, the removal of the unlatching of capping, panel etc.).In one embodiment, the countless absorbent articles that external member is bundled in together are defined as entity, and cover with thermoplastic film overwrap, and are as United States Patent (USP) 5,934, disclosed in 470.The thermoplastic film covering can comprise turned parts and remove portion of hot plastic films covering and use goods to allow.Typical turned parts can comprise successive substantially weak line, is preferably the perforation in the thermoplastic film covering.Exemplary turned parts is present in U.S. Patent application 5,036, in 978.
Although more than described an external member embodiment, other modification of external member also can clearly be predicted.Outer package can comprise multiple material, includes but not limited to thermoplastic film, non-woven material, weaving material, paper tinsel, fabric, paper, cardboard, elastomeric element, rope, belt, and their combination.Outer package can bundle and/or cover many pull-on garments wholly or in part.Other especially preferred packing and packing method are disclosed in United States Patent (USP) 5,050, in 742 and 5,054,619.In addition, external member can comprise a plurality of outer package.For example, many pull-on garments of the present invention can wrap up with thermoplastic film overwrap, and the pull-on garment of many film wrapped is by outer package in carton or in second thermoplastic film overwrap then.In addition, external member can not contain special turned parts.For example, there is not the thermoplastic film overwrap of perforation only to be unlocked by Tear Film.
Method of testing
Recover the elongation back
This method is used to measure as strain after the elongation of the stretch laminate of the function of temperature and time.Measurement is carried out when 22 ℃ (72 ℉) or when 32 ℃ (90 ℉).Measurement when 22 ℃ (72 ℉) is designed to simulate stretch laminate recovery at room temperature, and the measurement when 32 ℃ (90 ℉) is designed to measure stretch laminate near the recovery under the skin temperature.Sample is carried out two-step analysis, stretch and recovery.This method adopts the dynamic mechanical analysis instrument.This paper utilizes available from TA Instruments, Inc., NewCastle, the TA Instruments DMA 2980 of Delaware (below be called " DMA 2980 "), Universal Analysis 2000 softwares that it is furnished with pellicle fixture, is used for the Thermal Advantage/Thermal Solutions software of data acquisition and is used for data analysis.The DMA device that has many other types, and the technical staff by polymer and copolymer characteristic field that uses of dynamic mechanical analysis is known.
Operation, demarcation and guidance use the method for DMA 2980 to be present in the ThermalAdvantage user reference guide of TA Instruments DMA 2980 operator's manuals of in March, 2002 distribution, in July, 2000 distribution and Universal Analysis 2000 guides of issuing in February, 2003.For the technical staff who uses DMA 2980, below the operation service condition should be enough to the stretching and the recovery of repeated sample.
DMA 2980 is configured to and can operates having under the control force pattern of pellicle fixture.Pellicle fixture is installed on the DMA 2980 and according to the user reference guide demarcates.Stretch laminate to be measured is cut into the sample of basic uniform-dimension.For DMA 2980, suitable sample-size is about 20mm * 6.4mm * 1.0mm (a length x width x thickness).Sample thickness depends on the material and the structure of stretch laminate and depends on the confined pressure that is used to measure thickness.TA Instruments suggestion sample thickness when being installed in the pellicle fixture safely should be less than or equal to about 2.0mm.Adjust the following pellicle fixture among the DMA 2980 and be locked in the appropriate location, it provides about 10mm between clamping surface.Sample is installed in the pellicle fixture, and makes the gauge length that moves on the lower clamp with between the mensuration pellicle fixture.Record sample ID and size.Pellicle fixture is locked in the appropriate location and closes stove.
Drawing process-for the sample of above specified size, DMA 2980 is set as follows: be applied to the preload force on the sample (0.01N) in the anchor clamps; Auto zero displacement (unlatching) when the test beginning; Stove (closing), chucking position (locking), temperature remains on T when drawing process finishes
i(22 ℃ or 32 ℃).Data acquisition rate is set at 0.5Hz (1 point in per 2 seconds).Drawing process is loaded among the DMA 2980.This method is (1) initial temperature T step by step
i(22 ℃ or 32 ℃), (2) are at T
iFollowing balance, (3) data acquisition are opened and (4) increase power to 18.0N with 5.0N/min.
During the test beginning, temperature rises to specified T
i(22 ℃ or 32 ℃) [method step 1], and make temperature remain on this T
i[method step 2] down.At T
iAfter minimum 15 minutes, the operator begins the sample stretching and carries out data acquisition [method step 3 and 4] simultaneously down.The cumulative power (for example, for above specified sample-size, the cumulative power that applies is 5N/ minute) that applies with every millimeter initial specimen width 0.8N/min is stretched to the about 30mm of length with sample.The application of the more approaching simulation goods of increase gradually of power also prevents the sample breakage.The tensile elongation of sample with about 30mm is locked in the appropriate location and remains on T
iLaminated material is stretched to the required power of the length of about 30mm and in the percent strain of this length laminated material by the digitizer hand-kept on the instrument.By deducting tensile elongation with gauge length, then with this result divided by gauge length and multiply by 100 and calculate percent strain.With following formula the initial percentage strain is described:
Initial percentage strain=% strain
i=100* ((Ls-L
g)/L
g)
L wherein
gBe the length of stretch laminate under relaxed state of pinching, Ls for the length that is in the stretch laminate between the pellicle fixture in the stretching step of analyzing at last (～30mm).The % strain
iPercent strain for (after the stretching step of this method is finished) stretch laminate when restoration methods begins.The sample that is stretched to 30mm length by the gauge length of 10mm causes 200% percent strain.
Stretch laminate may not can show 200% strained ductility under the situation that does not produce irreversible distortion, layering or tear.Especially true for the stretch laminate that lateral plate, lower limb hoop and belt by commercially available prod such as diaper obtain.For example, when apply less power (＜4N) time, stretch laminate (～6.4mm is wide) can be stretched to 100% strain or 150% strain easily.Yet if the power that applies continues to increase to and reaches 200% strain, the percent strain of stretch laminate reaches stable and further may become difficulty and/or may cause the irreversible distortion of stretch laminate, layering or tear of extension.For this test, select maximum percent strain (for example 200%, 150% or 100%), make this strain can not cause the irreversible distortion of stretch laminate, layering or tear.If stretch laminate has the ductility less than 200% strain (± 5%), then a new sample example is stretched to the development length of 30mm from the gauge length of 12mm, it causes 150% percent strain.If stretch laminate has the ductility less than 150% strain (± 5%), then a new sample example is stretched to the development length of 30mm from the gauge length of 15mm, it causes 100% strained percent strain.Have＜test of the stretch laminate of 100% maximum ductility also belongs to the scope of this method.For 100% or littler initial percentage strain under the stretch laminate tested, elongation back strain is recorded as percent strain when the different recovery time (15 seconds, 30 seconds, 60 seconds and 3 minutes) but not the percentage ratio of initial strain percentage ratio (%).
For the sample of different size, adjust the apply power of stretching sample applied force to realize increasing with every millimeter initial specimen width 0.8N/min.For example, will be applied on the sample with 3.2mm original width with the power that 2.5N/min increases.For the sample of different length, adjust between elongating stage total displacement with realize 200% initial percentage strain (if perhaps sample have limited ductility can be littler, i.e. 150% or 100% strain).
Restoration methods-be loaded into restoration methods on the instrument and in drawing process, reach required initial percentage strain (promptly 200%, 150% or 100%) after began about 15 seconds.Four steps of restoration methods open for (1) data storage, and (2) apply the power of 0.01N, and (3) rise to T
i, (4) isothermal 3.0 minutes minutes.Following DMA 2980 parameter settings are changed by drawing process: (pass) changed in the automatic zero point displacement.At specified temperature (T
I=22 ℃ or 32 ℃) down above the length of measuring sample after 3 minutes time period with restoration methods.Sample length, percent strain and probe temperature are noted as the function of recovery time.Elongation back strain is recorded as the strained percent of back initial percentage different recovery time (15 seconds, 30 seconds, 60 seconds and 3 minutes).
For the sample of different size, the adjustment recovery is applied to the apply power (6.4mm width sample 0.01N) of power to realize every millimeter initial specimen width 0.0016N on the sample during (above the 2nd step).For example, the power with 0.005N is applied on the sample of 3.2mm width.
Two circulations lag behind and test
This method is used to be determined at the product that comprises slow recovery stretch laminate use during may with the suffered relevant character of power of consumer, in case and product use the back how it fit and work.
Two circulation hysteresis method of testings in room temperature (21 ℃/70 ℉) down and also carry out under body temperature (37 ℃/99 ℉).Stretch laminate to be measured is cut into the sample of basic straight-line dimension.Select sample-size so that realize required strain with the power that is suitable for device.The device that is suitable for this test comprises and is commercially available in MTS Systems Corp., Eden Prairie, Minn. tensile tester (for example Alliance RT/1 or Sintech 1/S) or be commercially available in Instron Engineering Corp., Canton, the tensile tester of Mass.For above Alliance RT/1 that enumerates or Sintech 1/S device, suitable sample-size takes advantage of about 100mm long for about 25mm is wide.Sample thickness depends on the material and the structure of stretch laminate and depends on the confined pressure that is used to measure thickness.It is thick that the sample thickness of measuring with 1.4kPa (0.2psi) confined pressure typically is 0.5mm to 5mm.Yet, have different-thickness (for example,＜0.5mm or＞test of 5mm) stretch laminate is also in the scope of this method.
Following steps are for example understood the measurement when using above sample-size and Alliance RT/1 or Sintech 1/S.Device and computer interface.TestWorks 4
TMThe software control test parameter carries out data acquisition and calculating, and figure and data record are provided.
The anchor clamps width that is used to test is more than or equal to specimen width.Typically use 2.54cm (the wide anchor clamps of 1 ").These anchor clamps are used for along the air-actuated jaw of concentrating whole clamping forces perpendicular to the single line of test stress direction for design, and it has a plane and extends a semicircle by it (the relative face of radius=6mm) is to minimize the slip of sample with one.Under the measurement situation, last anchor clamps are the lightweight anchor clamps with serrated face in the time of 37 ℃.
Select force cell make institute's dynamometry will force cell ability or used load range 10% and 90% between.Typically use the force cell of 25N.Install and fix equipment and anchor clamps.Explanation calibrating installation according to the manufacturer.(2.50 "), it is measured with the steel ruler that places the anchor clamps next door for 63.5mm to step up distance (gauge length) between the line of power.Load reading on the device is set to zero with the quality of deduction fixing device and anchor clamps.Before the test with sample minimum 1 hour of balance 21 ℃ the time.Sample is installed in the anchor clamps, mounting means make not lax and the load of surveying between 0.00N and 0.02N.Device is positioned over is used for the measurement carried out 21 ℃ the time in the temperature controlled compartment.Adopt the probe temperature of suitable environmental chamber to be kept for measuring at 37 ℃; Sample is installed in the anchor clamps and balance 5 minutes when beginning before the test at 37 ℃.
2 circulation hysteresis method of testings relate to following steps:
(1) strains sample constantly to specified initial percentage strain (that is strain, with the fixed chuck speed of 50.8cm/min (20 "/minute)
i=150%).
(2) reduce strain to 0% strain constantly with the fixed chuck speed of 7.62cm/min (3 "/minute) and (that is, recover anchor clamps to initial 6.4cm (gauge lengths of 2.50 ")).
(3) strain sample constantly to strain with the fixed chuck speed of 50.8cm/min (20 "/minute)
i
(4) the fixed chuck speed with 7.62cm/min (3 "/minute) reduces strain to 60% strain.
(5) keep sample under 60% strain 5 minutes.
(6) the fixed chuck speed with 7.62cm/min (3 "/minute) is back to 0% strain.
The off-load power of record is the off-load power that stretch laminate (SL) is measured after keeping 5 minutes under 60% strain in step 5, be normalized to the basic weight of elastomer+binding agent (E+A) among the per 1 meter SL width * SL of newton, N/ (mgsm)=N/ (g/m) is shown below out.The basic weight of elastomer and binding agent calculates divided by the SL area of stretching out fully by the gram number with elastomer+binding agent among the SL among the SL.Area (the A of the stretch laminate of stretching out fully
FESL) be defined as under not having elastomer and adhesive case the area of substrate in the stretch laminate.Normalization off-load unit of force is
For different sample-size, can adjust chuck speed to keep for the suitable strain rate of each part in the test.For example, (the sample gauge length of 1.25 ") can adopt the 0.42cm/s (chuck speed of 25.4cm/min (10 "/min)) in step 1 and 3 for 31.7mm.
Embodiment
Film preparation-utilization comprises the selected stretch laminate of film preparation of not commensurability elastomer polymer as shown in table 1, modified resin and mineral oil.Blend can realize by extruding elastomer (sample film 1) or being pressed into thin film (sample film 2,3,4) by the solvent cast mixture and on the Carver hot press.The scale of each component is shown as the percentage by weight of elastic composition.Embodiment in the table 1 comprises styrene-isoprene-phenylethene (S-I-S) triblock copolymer, with trade name Vector
4211 are commercially available in Dexco Polymers L.P., Houston, TX.In sample film 2 to 4, elastic composition comprises white mineral oil, with trade name Bristol
50T is commercially available in CromptonCorporation, Petrolia, PA.Sample film 2 comprises the modified resin of alicyclic hydrocarbon resin form, with trade name Arkon P140 available from Arakawa Chemical Inc., Chicago, IL.Sample film 3 and 4 comprises the modified resin of poly-(t-butyl styrene) form, at The Procter ﹠amp; GambleCompany is by synthesizing available from the monomeric radical polymerization of t-butyl styrene of Aldrich Chemical Company.The weight average molecular weight of poly-(t-butyl styrene) sample is 3.2E-20g (19kDa), as measuring by polystyrene standards in the gel permeation chromatography employing oxolane.
Table 1
Elastic composition (% weight)
| The sample film sequence number | 1 * | 2 | 3 | 4 |
| Vector?4211(SIS，29％S) | 100 | 49 | 59 | 45 |
| Poly-(t-butyl styrene), 3.2E-20g (19kDa) | ? | ? | 39 | 45 |
| Arkon?P140 | ? | 49 | ? | ? |
| Mineral oil, White Britol-50T | ? | 2 | 2 | 10 |
*Sample 1 is the comparative example, and sample 2 to 4 is embodiment of the present invention.
The preparation of laminated material (embodiment 1A, 2A to 2C, 3A to 3C and 4A)-sequence number is stretch laminate disclosed film preparation in the table 1 of 1A, 2A, 2B, 2C, 3A, 3B, 3C and 4A.The size of adjusting elastomer thin film multiply by about 8cm and grows to about 2cm is wide.The mass measurement of each elastomer thin film near 0.1mg.The basic weight of each thin film (restraining every square metre, " gsm ") is by calculating divided by film size (length multiply by width, unit for square metre) with film weight (unit for gram).Stretch laminate in the table 2 is the laminated multi-layer structure with first non-woven material, elastomer thin film and second non-woven material of adhesives.Available from Amoco Fabrics, Gronau, first non-woven material of Germany are the carding polypropylene thermal bonded nonwoven material with 18gsm basic weight with provision code 040018007.Available from Sandler AG, Saale, second non-woven material of Germany are carding polypropylene, the P11 heat bonding non-woven material with about 30gsm basic weight with supply name Soft Sandler Topsheet VP30/01/11.Utilization is bonded to first non-woven material on the first surface of elastomer thin film with the single-adhesive of the 18.6gsm amount that spiral pattern is used.Utilization is bonded to second non-woven material on the second surface of elastomer thin film with the single-adhesive of the 18.6gsm amount that spiral pattern is used.Suitable bonding is Findley 2861, available from Bostik, and Inc., Middletown, MA.
The preparation of stretch laminate, the strain of tensile elasticity parts to 400% relates to following steps:
(1) measurement is used for width, length, thickness and the weight of the elastomer thin film of stretch laminate.Belt is connected to each end of thin film, makes that the film length between the belt is 5cm.
(2) first non-woven material (2.54cm wide * 30cm long) is placed onboard and pulled down each end with belt and keep flat onboard to keep laminated material.The initial length of the non-woven material between the belt (Linw) is long for 25mm.
(3) adhesive tape (that is, being administered to the binding agent of the 18.6gsm on the face of the antiseized scraps of paper of 2.25cm * 28cm with spiral pattern) is placed on the non-woven material between two parties.Utilize HR-100 roller (ASTM, 2kg have 80 Shore rubber) with 2 all one's efforts beat exert pressure with adhesives to non-woven material.Remove separate paper.
(4) tensile elasticity body thin film (2cm between the belt wide non-stretching * 5cm is long) is placed on adhesive tape/non-woven material between two parties to the initial non-woven material length (25cm) between the belt and with it.To slowly recover elastomeric element and be stretched to 400% strain (5cm to 25cm).
(5) adhesive tape that will be similar to described in the step (3) is placed on the tensile elasticity body thin film between two parties.Exert pressure to bond (HR-100,2 times all one's effort is beaten) and to remove separate paper.Two spiral adhesive tapes that are used for step 3 and 5 join stretch laminate with about 0.21 gram binding agent.Stretch out the area (A of slow recovery stretch laminate fully
FESL) be 0.00635m
2(the long 2.54cm that takes advantage of of the 25cm between the belt is wide).
(6) second non-woven material (2.54cm between the belt wide * 25cm long) is placed on the laminated material between two parties.(HR-100,10 times all one's effort is beaten) exerts pressure with joined laminate with roller.
(7) will remove and make remaining at room temperature to spend the night or placed 30 minutes 37 ℃ the time on the laminate structures slave plate.There is not the final lengths of measuring pinching laminated material between the belt under the stretching.Utilize following formula to calculate the largest percentage strain (maximum strain percentage ratio (%)) of lamination material between the elongating stage of the initial length that is no more than non-woven material:
Maximum strain percentage ratio (%)=100* ((Linw-L
g)/L
g)
L wherein
gBe the pinching length of stretch laminate, Linw is the initial length of non-woven material.Stretch laminate 1A, 2A, 3A and 4A in the table 2 is with being stretched to the preparation of 400% strained elastic composition thin film (table 1); These stretch laminates have 〉=200% largest percentage strain.The percent strain of elastomer thin film will influence the pinching degree of finished product laminated material during elastomer thin film characteristic (for example basic weight and modulus) prepares with stretch laminate.Stretch laminate 2B, 2C, 3B and 3C in the table 2 be stretched to 240% strain (2B, 3B) or 200% strain (2C, the preparation of 3C) elastic composition thin film (table 1).The largest percentage strain of these stretch laminates and being used for is extended the back and is recovered the initial percentage strain of test and be shown in Table 2.
The table 2-stretch laminate sample of elastomer film preparation in the table 1
| Embodiment | Sample film # | Elastic strain percentage ratio (%) during the laminated material preparation | The maximum strain percentage ratio (%) of laminated material | Laminated material recovers the initial strain percentage ratio (%) in the test after elongation |
| 1A | 1 | 400 | 335 | 199 |
| 2A | 2 | 400 | 238 | 199 |
| 2B | 2 | 240 | 149 | 148 |
| 2C | 2 | 200 | 137 | 100 |
| 3A | 3 | 400 | 233 | 200 |
| 3B | 3 | 240 | 155 | 148 |
| 3C | 3 | 200 | 135 | 100 |
| 4A | 4 | 400 | 210 | 200 |
Stretch laminate preparation (comparative example 6 to 12)-comparative example 6 to 12 is the stretch laminate from commercially available diaper.From the diaper of lax, unstretched state, remove stretch laminate (lower limb hoop, lateral plate or waist).To cut the wide long standard specimen of about 20mm that multiply by into about 6.4mm from the stretch laminate sample of waist and lateral plate, wherein length is identical with the diaper direction that the lamination material is stretched between the operating period.The pinching elastic waist laminated material at two inches at center is separated with the super infantilism diaper of Huggies.Outer covering piece (laminated material of non-woven material, thin polymer film and non-woven material) is removed from waist feature.Gained stretch laminate sample is cut with the wide long size of about 20mm that multiply by of about 6.4mm, and wherein length is identical with the diaper direction that the lamination material is stretched between the operating period.The lower limb hoop is removed and is pruned terminal from diaper.The gained stretch laminate is cut into the long and pruning of about 20mm of all elastic components that keep the lower limb hoop into about the wide standard specimen of 6.4mm, it may not occupy the center of width.Being used to extend back recovery test is shown in Table 3 with the initial percentage strain (200% ± 5%, 150% ± 5%, 100% ± 5%) of testing each comparative example.
Table 3-is from the comparative example of the stretch laminate of diaper
| The laminated material sample | Explanation | Laminated material recovers the initial strain percentage ratio (%) in the test after elongation |
| 6 | Huggies covers lateral plate | 199 |
| 7 | Pampers Cruisers stretching auricle | 199 |
| 8 | The Huggies outer leg cuff | 148 |
| 9 | Lower limb hoop in the Huggies | 149 |
| 10 | Lower limb hoop in the Pampers Cruisers | 146 |
| 11 | The senior belt of Huggies | 100 |
| 12 | Pampers Cruisers outer leg cuff | 99 |
Comprise that restoration methods is measured after stretch laminate sample in the table 3 of stretch laminate of current diaper products (sample 6,7,8,9,10,11 and 12) is according to the elongation described in the above Test Methods section.The results are shown in the table 4 in (about 200% initial strain), the table 5 in (about 150% the initial strain) and table 6 (about 100% initial strain).Record is from the basic weight of the elastomer thin film that is used for preparation test stretch laminate sample (2A, 2B, 2C, 3A, 3B, 3C, 4A) of table 1.Record tension laminated material sample is newton's power (not normalization film quality or thickness) to the measured unit of initial strain percentage ratio (%).Write down different recovery times the initial strain percentage ratio that (15 seconds, 30 seconds, 60 seconds and 3 minutes) keep down, wherein the initial strain percentage ratio of Bao Liuing calculates with following formula:
Initial strain percentage ratio=100 * [percent strain (%) the during time (t)/initial strain percentage ratio (%)] that keeps
Sample (about 100% initial strain) for record in the table 6 has also write down the percent strain under each recovery time.
Table 4
Be stretched to the initial strain percentage ratio of the stretch laminate that keeps after 200% initial strain
| The laminated material sample | 1A | 2A | 3A | 4A | 6 | 7 |
| The initial strain percentage ratio that keeps when 22 ℃ (72 ℉) | ? | ? | ? | ? | ? | ? |
| Thin film basic weight (gsm) | 127 | 148 | 142 | 112 | - | - |
| Initial strain is (N) firmly | 4.1 | 1.9 | 1.8 | 2.0 | 0.7 | 1.1 |
| Recover the initial strain percentage ratio (%) after 15 seconds | 4 | 22 | 22 | 37 | 4 | 5 |
| Recover the initial strain percentage ratio (%) after 30 seconds | 3 | 15 | 15 | 27 | 4 | 5 |
| Recover the initial strain percentage ratio (%) after 60 seconds | 3 | 10 | 10 | 19 | 3 | 5 |
| Recover the initial strain percentage ratio (%) after 3 minutes | 3 | 6 | 5 | 10 | 3 | 4 |
| ? | ? | ? | ? | ? | ? | ? |
| The initial strain percentage ratio that keeps when 32 ℃ (90 ℉) | 1A | 2A | 3A | 4A | 6 | 7 |
| Thin film basic weight (gsm) | 124 | 148 | 142 | 121 | - | - |
| Initial strain is (N) firmly | 3.4 | 1.3 | 1.3 | 1.3 | 0.7 | 1.1 |
| Recover the initial strain percentage ratio (%) after 15 seconds | 3 | 9 | 10 | 20 | 4 | 6 |
| Recover the initial strain percentage ratio (%) after 30 seconds | 3 | 6 | 7 | 13 | 3 | 6 |
| Recover the initial strain percentage ratio (%) after 60 seconds | 2 | 5 | 5 | 8 | 3 | 5 |
| Recover the initial strain percentage ratio (%) after 3 minutes | 2 | 3 | 4 | 5 | 3 | 5 |
Table 5
Be stretched to the initial strain percentage ratio of the stretch laminate that keeps after 150% initial strain
| The laminated material sample | 2B | 3B | 8 | 9 | 10 |
| The initial strain percentage ratio that keeps when 22 ℃ (72 ℉) | ? | ? | ? | ? | ? |
| Thin film basic weight (gsm) | 126 | 155 | - | - | - |
| Initial strain is (N) firmly | 2.1 | 1.9 | 4.0 | 2.7 | 1.7 |
| Recover the initial strain percentage ratio (%) after 15 seconds | 34 | 30 | 6 | 6 | 6 |
| Recover the initial strain percentage ratio (%) after 30 seconds | 24 | 21 | 5 | 5 | 5 |
| Recover the initial strain percentage ratio (%) after 60 seconds | 16 | 14 | 4 | 5 | 5 |
| Recover the initial strain percentage ratio (%) after 3 minutes | 9 | 8 | 3 | 4 | 4 |
Table 6
Be stretched to the initial strain percentage ratio of the stretch laminate that keeps after 100% initial strain
| The laminated material sample | 2C | 3C | 11 | 12 |
| The initial strain percentage ratio that keeps when 22 ℃ (72 ℉) | ? | ? | ? | ? |
| Thin film basic weight (gsm) | 132 | 163 | - | - |
| Initial strain is (N) firmly | 1.3 | 1.5 | 0.6 | 0.7 |
| Initial strain percentage ratio (%) | 100 | 100 | 100 | 99 |
| Recover the initial strain percentage ratio (%) after 15 |
43 | 30 | 8 | 7 |
| Recover the percent strain (%) after 15 seconds | 42 | 30 | 8 | 7 |
| Recover the initial strain percentage ratio (%) after 30 |
32 | 21 | 7 | 6 |
| Recover the percent strain (%) after 30 |
32 | 21 | 7 | 6 |
| Recover the initial strain percentage ratio (%) after 60 seconds | 23 | 14 | 7 | 5 |
| Recover the percent strain (%) after 60 seconds | 23 | 14 | 7 | 5 |
| Recover the initial strain percentage ratio (%) after 3 minutes | 13 | 8 | 6 | 4 |
| Recover the percent strain (%) after 3 minutes | 13 | 8 | 6 | 4 |
Measure when 21 ℃ and 37 ℃ according to the circulation of 2 described in the above Test Methods section test that lags behind with the off-load power of stretch laminate (1A, 2A, 3A and 4A) in the table 2 that is tensioned to 400% elastic composition film preparation.At 2 circulation hysteresis test periods, whole stretch laminates are placed in the anchor clamps, the position occupy the center of width and length.The results are shown in the table 8.
Table 7
The off-load power N/ (g/m) of laminated material
| Sample | 2A | 3A | 4A | 5 ** |
| Normalization off-load power when 21 ℃ (70 ℉) [N/ (Mi Kuandu laminated material gsm E+A)] | 0.31 | 0.26 | 0.20 | 0.11 |
| Normalization off-load power when 37 ℃ (99 ℉) [N/ (Mi Kuandu laminated material gsm E+A)] | 0.29 | 0.25 | 0.19 | 0.10 |
*No. 5 samples are the comparative examples of the laminated material made with Findley H2401 adhesive films (using the Carver hot press to be pressed into thin film).
The relevant part of all references is incorporated herein by reference in the detailed Description Of The Invention.It is to its approval as prior art of the present invention that the quoting of any document not can be regarded as.When any definition of term in any definition of term in this written document record or implication and the document that is incorporated herein by reference or implication are conflicted, will be as the criterion with the definition or the implication of giving term in this document.
Although illustrated and described the present invention with specific embodiments, it would be obvious to those skilled in the art that and under the situation that does not deviate from the spirit and scope of the present invention, can make many other change and modifications.Therefore, in additional claims, comprise all such changes and modifications that belong in the scope of the invention consciously.
Claims (21)
1. absorbent article, described absorbent article comprises:
A) top flat;
B) egative film that engages with described top flat;
C) place absorbent cores between described top flat and the egative film;
D) be selected from goods element: anus hoop, elasticated topsheet, fastening system, lower limb hoop, waist elasticity assembly, lateral plate, auricle and their combination by the following group of forming;
Wherein said goods element comprises slow recovery stretch laminate, and described stretch laminate shows 0.16N/ (g/m) or bigger off-load power and show 10% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃ in 37 ℃,
Wherein said slow recovery stretch laminate comprises:
A) at least the first substrate, it has first surface and second surface;
B) at least one elastic component, it joins on the first surface of described substrate,
Wherein said elastic component comprises:
A) 20% to 100% at least a elastomer polymer,
B) optional 0.01% to 60% at least a modified resin; With
C) optional 0.01% to 60% at least a additive,
Above-mentioned three kinds of percentages of ingredients content summations are no more than 100%,
Wherein said elastomer polymer is selected from the group of being made up of following material: natural and synthetic rubber, polyurethane, silicone rubber, olefin elastomer, ionomer and their combination,
Wherein said modified resin is selected from the group of being made up of following material: unhydrided C5 hydrocarbon resin or C9 hydrocarbon resin, partial hydrogenation and whole hydrogenant C5 hydrocarbon resin or C9 hydrocarbon resin; Alicyclic resin; Terpene resin; Polystyrene; Poly-t-butyl styrene; Colophonium and rosin derivative; The benzofuran indenes; Dicyclopentadiene; Polymethylstyrene; Phenolic resins; The copolymer of the polymer of indenes, the oligomer of indenes and indenes; The copolymer of the polymer of the oligomer of acrylate and methacrylate ester, acrylate and methacrylate ester and acrylate and methacrylate ester; Their derivant; And their combination.
2. absorbent article as claimed in claim 1, wherein said synthetic rubber comprises neoprene, described olefin elastomer comprises styrene block copolymer and polyisoprene.
3. absorbent article as claimed in claim 1, wherein said stretch laminate shows 20% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.
4. absorbent article as claimed in claim 1, wherein said stretch laminate shows 30% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃.
5. absorbent article as claimed in claim 1, wherein said slow recovery stretch laminate shows initial strain percentage ratio after recovering 15 seconds in 32 ℃, wherein in 22 ℃ of initial strain percentage ratios after recovering 15 seconds with in the difference of 32 ℃ of initial strain percentage ratios after recovering 15 seconds more than or equal to 5%.
6. absorbent article as claimed in claim 1, wherein said slow recovery stretch laminate also comprises second substrate with first surface and second surface, wherein said elastic component joins on the first surface of second substrate, makes described elastic component be arranged between first substrate and second substrate.
7. absorbent article as claimed in claim 1, wherein said elastic component with adhesive bond to the first surface of described substrate.
8. absorbent article as claimed in claim 7, wherein said elastomer polymer are the block copolymer that comprises at least one basic soft segment and at least one basic hard block.
9. absorbent article as claimed in claim 7, wherein said slow recovery stretch laminate also comprises the additive that is selected from the group that comprises following material: stabilizing agent, antioxidant, viscosity modifier, processing aid, antibacterial, coloring agent, filler or their combination.
10. absorbent article as claimed in claim 1, wherein said elastic component are the form that is selected from by the following group of forming: thin film, strand, belt, crosshatch arrangement, foam and their combination.
11. absorbent article as claimed in claim 1, wherein said first substrate is selected from the group of being made up of following: non-woven webs, woven fleece, knit goods, thin film, nonwoven laminates, sponge, foam, scrim and their combination.
12. absorbent article as claimed in claim 11, wherein said thin film comprises perforated film.
13. absorbent article as claimed in claim 1, wherein said absorbent article is selected from the group that comprises following products: the medicated underpants of diaper, training pants, pull-on garment, refastenable, adult incontinence products or feminine care.
14. a slow recovery stretch laminate, described material comprises
A) at least the first substrate, its have first surface and second surface and
B) at least one elastic component, it joins on the first surface of described substrate;
Wherein said slow recovery stretch laminate shows 0.16N/ (g/m) or bigger off-load power and shows 10% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃ in 37 ℃,
Wherein said elastic component comprises:
A) 20% to 100% at least a elastomer polymer,
B) optional 0.01% to 60% at least a modified resin; With
C) optional 0.01% to 60% at least a additive,
Above-mentioned three kinds of percentages of ingredients content summations are no more than 100%,
Wherein said elastomer polymer is selected from the group of being made up of following material: natural and synthetic rubber, polyurethane, silicone rubber, olefin elastomer, ionomer and their combination,
Wherein said modified resin is selected from the group of being made up of following material: unhydrided C5 hydrocarbon resin or C9 hydrocarbon resin, partial hydrogenation and whole hydrogenant C5 hydrocarbon resin or C9 hydrocarbon resin; Alicyclic resin; Terpene resin; Polystyrene; Poly-t-butyl styrene; Colophonium and rosin derivative; The benzofuran indenes; Dicyclopentadiene; Polymethylstyrene; Phenolic resins; The copolymer of the polymer of indenes, the oligomer of indenes and indenes; The copolymer of the polymer of the oligomer of acrylate and methacrylate ester, acrylate and methacrylate ester and acrylate and methacrylate ester; Their derivant; And their combination.
15. slow recovery stretch laminate as claimed in claim 14, wherein said synthetic rubber comprises neoprene, and described olefin elastomer comprises styrene block copolymer and polyisoprene.
16. slow recovery stretch laminate as claimed in claim 14, wherein said laminated material is incorporated in the curable product.
17. slow recovery stretch laminate as claimed in claim 14, wherein said laminated material is incorporated in the absorbent article.
18. an absorbent article, described absorbent article comprises:
A) top flat,
B) egative film that engages with described top flat,
C) place between described top flat and the egative film absorbent cores and
D) slow recovery stretch laminate, wherein said slow recovery stretch laminate comprises:
I) at least the first substrate, its have first surface and second surface and
Ii) at least one elastic component, it joins on the first surface of described substrate,
Wherein said slow recovery stretch laminate shows 0.16N/ (g/m) or bigger off-load power and shows 10% or bigger initial strain percentage ratio after recovering 15 seconds in 22 ℃ in 37 ℃,
Wherein said elastic component comprises:
A) 20% to 100% at least a elastomer polymer,
B) optional 0.01% to 60% at least a modified resin; With
C) optional 0.01% to 60% at least a additive,
Above-mentioned three kinds of percentages of ingredients content summations are no more than 100%,
Wherein said elastomer polymer is selected from the group of being made up of following material: natural and synthetic rubber, polyurethane, silicone rubber, olefin elastomer, ionomer and their combination,
Wherein said modified resin is selected from the group of being made up of following material: unhydrided C5 hydrocarbon resin or C9 hydrocarbon resin, partial hydrogenation and whole hydrogenant C5 hydrocarbon resin or C9 hydrocarbon resin; Alicyclic resin; Terpene resin; Polystyrene; Poly-t-butyl styrene; Colophonium and rosin derivative; The benzofuran indenes; Dicyclopentadiene; Polymethylstyrene; Phenolic resins; The copolymer of the polymer of indenes, the oligomer of indenes and indenes; The copolymer of the polymer of the oligomer of acrylate and methacrylate ester, acrylate and methacrylate ester and acrylate and methacrylate ester; Their derivant; And their combination.
19. absorbent article as claimed in claim 18, wherein said synthetic rubber comprises neoprene, and described olefin elastomer comprises styrene block copolymer and polyisoprene.
20. an absorbent article, described absorbent article comprises:
A) top flat;
B) egative film that engages with described top flat;
C) place absorbent cores between described top flat and the egative film; With
D) be selected from goods element: anus hoop, elasticated topsheet, fastening system, lower limb hoop, waist elasticity assembly, lateral plate, auricle and their combination by the following group of forming;
Wherein said goods element is included in 37 ℃ of slow recovery stretch laminates that show 0.16N/ (g/m) or bigger off-load power, and
Wherein when 100% or littler initial strain under when testing, described slow recovery stretch laminate shows 10% or bigger percent strain after recovering 15 seconds in 22 ℃,
Wherein said slow recovery stretch laminate comprises:
A) at least the first substrate, it has first surface and second surface;
B) at least one elastic component, it joins on the first surface of described substrate,
Wherein said elastic component comprises:
A) 20% to 100% at least a elastomer polymer,
B) optional 0.01% to 60% at least a modified resin; With
C) optional 0.01% to 60% at least a additive,
Above-mentioned three kinds of percentages of ingredients content summations are no more than 100%,
Wherein said elastomer polymer is selected from the group of being made up of following material: natural and synthetic rubber, polyurethane, silicone rubber, olefin elastomer, ionomer and their combination,
Wherein said modified resin is selected from the group of being made up of following material: unhydrided C5 hydrocarbon resin or C9 hydrocarbon resin, partial hydrogenation and whole hydrogenant C5 hydrocarbon resin or C9 hydrocarbon resin; Alicyclic resin; Terpene resin; Polystyrene; Poly-t-butyl styrene; Colophonium and rosin derivative; The benzofuran indenes; Dicyclopentadiene; Polymethylstyrene; Phenolic resins; The copolymer of the polymer of indenes, the oligomer of indenes and indenes; The copolymer of the polymer of the oligomer of acrylate and methacrylate ester, acrylate and methacrylate ester and acrylate and methacrylate ester; Their derivant; And their combination.
21. absorbent article as claimed in claim 20, wherein said synthetic rubber comprises neoprene, and described olefin elastomer comprises styrene block copolymer and polyisoprene.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64392005P | 2005-01-10 | 2005-01-10 | |
| US60/643,920 | 2005-01-10 | ||
| US11/144,497 US7905872B2 (en) | 2004-06-04 | 2005-06-03 | Absorbent articles comprising a slow recovery stretch laminate |
| US11/144,497 | 2005-06-03 | ||
| PCT/US2005/030415 WO2006076052A1 (en) | 2005-01-10 | 2005-08-26 | Absorbent articles comprising a slow recovery stretch laminate |
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| CN101083968B true CN101083968B (en) | 2011-12-21 |
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| CNA2006800019707A Pending CN101102735A (en) | 2005-01-10 | 2006-01-10 | Absorbent articles with stretch zones comprising slow recovery elastic materials |
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|---|---|---|---|---|
| US9034230B2 (en) * | 2009-08-03 | 2015-05-19 | The Procter & Gamble Company | Method for making an elastomeric apertured web |
| EP2647360B1 (en) * | 2010-11-30 | 2018-06-20 | Kao Corporation | Disposable diaper and method for producing same |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4450026A (en) * | 1979-12-21 | 1984-05-22 | Johnson & Johnson Baby Products Company | Method of forming a conformable garment with "killed" elastic portions |
| EP0650714A1 (en) * | 1993-11-01 | 1995-05-03 | The Procter & Gamble Company | Method of making an absorbent article using an activatable composite elastic member |
| US5536563A (en) * | 1994-12-01 | 1996-07-16 | Kimberly-Clark Corporation | Nonwoven elastomeric material |
| CN1345991A (en) * | 2000-08-31 | 2002-04-24 | 尤妮佳股份有限公司 | Method for making compound sheet material with elasticity |
-
2005
- 2005-08-26 CN CN2005800439662A patent/CN101083968B/en not_active Expired - Fee Related
-
2006
- 2006-01-10 CN CNA2006800019707A patent/CN101102735A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4450026A (en) * | 1979-12-21 | 1984-05-22 | Johnson & Johnson Baby Products Company | Method of forming a conformable garment with "killed" elastic portions |
| EP0650714A1 (en) * | 1993-11-01 | 1995-05-03 | The Procter & Gamble Company | Method of making an absorbent article using an activatable composite elastic member |
| US5536563A (en) * | 1994-12-01 | 1996-07-16 | Kimberly-Clark Corporation | Nonwoven elastomeric material |
| CN1345991A (en) * | 2000-08-31 | 2002-04-24 | 尤妮佳股份有限公司 | Method for making compound sheet material with elasticity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101083968A (en) | 2007-12-05 |
| CN101102735A (en) | 2008-01-09 |
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