CN103306052A

CN103306052A - Method of manufacturing a personal hygiene product

Info

Publication number: CN103306052A
Application number: CN2013100800996A
Authority: CN
Inventors: 布赖恩·K·亚当斯
Original assignee: Nordson Corp
Current assignee: Nordson Corp
Priority date: 2012-03-13
Filing date: 2013-03-13
Publication date: 2013-09-18
Anticipated expiration: 2033-03-13
Also published as: DE102013204211A1; CN103306052B

Abstract

A method of manufacturing a disposable absorbent personal hygiene product including a stretched elastic strand and a flat nonwoven substrate includes mixing a pressurized gas and hot melt adhesive to form a foamed adhesive. A filament of foamed adhesive is discharged toward the stretched elastic strand and deposited onto the stretched elastic strand so that the foamed adhesive expands in volume on the stretched elastic strand. The stretched elastic strand is secured to the flat nonwoven substrate with the foamed adhesive. Alternatively, the foamed adhesive secures two flat nonwoven substrate portions of the disposable absorbent personal hygiene product together.

Description

Make the method for personal hygiene products

The cross reference of related application

The application requires the U.S. Provisional Patent Application sequence No.61/610 that submitted on March 13rd, 2012, and 063(is unsettled) priority, incorporate its disclosure into this paper with reform.

Technical field

The application relates to a kind of distribution method, and it is used for during making the disposable absorptive personal hygiene products, to the various parts coating foam thermal melt adhesives of disposable absorptive personal hygiene products.

Background technology

Making the disposable absorptive personal hygiene products, during diaper, adult incontinence products and feminine hygiene, with liquid adhesive, be coated on the various parts such as hot-melt adhesive.On the various parts that hot-melt adhesive are coated to the disposable absorptive personal hygiene products, various distribution systems been have have been researched and developed.In an example, these distribution systems are coated in lamination or the binder course of hot-melt adhesive between two flat substrate, such as being coated between nonwoven fibre layers and the thin polyethylene counterdie.In another example, one or more of hot-melt adhesive silks are applied to one or more of thin elastica thighs, this elastica thigh are adhered at the bottom of the non-woven lining, with form the disposable absorptive personal hygiene products through the elasticity handling part.In the downstream of distribution system, various parts (for example, flat substrate layer and elastica thigh) pass pressure clamp, so that parts are fixed together.

In these are used, during distribution must careful control hot-melt adhesive silk, with guarantee will expectation the adhesive pattern be applied to thin elastica thigh, or it is coated in the narrow zone of accurate restriction on the flat substrate.In the known allocation system, the continuous yarn of discharging liquid adhesive from mould with the outlet of one or more adhesive or nozzle.The usually related plant air outlet of tool of each adhesive outlet, this plant air outlet is discharged air-spray at the silk place that has distributed.Air-spray attenuates every liquid adhesive silk, and causes this substantially with backward and forward mode, spiral fashion or depend on that the another way of the position of air-spray moves.When silk being deposited on the mobile flat substrate, this silk forms overlapping pattern or non-overlapped pattern.Therefore, in order accurately to locate and adhere to mobile line thigh or flat substrate, control carefully the liquid adhesive silk.

For careful control liquid adhesive silk, the plant air jet that uses in these known allocation systems is at full speed mobile, and described high speed is enough to change by controlled way the flight of liquid adhesive silk.Yet, use relative high velocity air can cause excessively " flight ", the desired distribution pattern wherein blows off adhesive filament.Should " flight " cause adhesive deposits outside on expectation pattern border.Use relative high velocity air jet also can cause " shooting ", wherein adjacent adhesive filament is twined, and forms bead of adhesive and unexpected pattern at substrate.Therefore, the known allocation system needs adhesive to have fully high speed and/or density, can carry out repeating when minimizing " flight " and " shooting " and accurately control.

When estimating adhesive between one or more elastica thighs and one or more flat substrate when rendeing a service, the characteristic of usually measuring is creep resistance." creep " of elastica thigh is defined as, and arbitrary end of elastica thigh adheres to the motion that the initial position of substrate begins from this end.This end of the level of creep resistance indication elastica thigh keep sticking to have about the situation in the position of the substrate that adheres to the elastica thigh how good.Because the elastica thigh adheres to substrate under the state that stretches, so the elastica thigh is lasting afterburning to undercoat, and adhesive attempts to return to the unstretched condition that loosens.This power is so that during using the disposable absorptive personal hygiene products, this product can keep firm engagement with skin surface through elasticity handling part (for example, the shank goffering on the diaper).If the elastica thigh in the disposable absorptive personal hygiene products is being assembled by successive what obvious creep compliance, at least one end of elastica thigh just will break away from combination with substrate effectively, and reduce through the ability of elasticity handling part maintenance with the skin surface firm engagement.For fear of this bad creep, must form high quality bond by the adhesive that is applied to the elastica thigh, so that the elastica thigh is not disengaged with substrate.

The well-known method that therefore a kind of quality that improves the adhesive combination reduces creep is at substrate or the other adhesive of elastica thigh coating.Yet, apply too many adhesive to the elastica thigh and locked the elastica thigh along the length of elastica thigh, therefore reduced the effectiveness of elastomeric material to the undercoat reinforcing.In other words, the elastica thigh has lost the ability that adds enough convergent forces to undercoat.

In addition, the amount that is increased in the adhesive that uses in the manufacturing of disposable absorptive personal hygiene products has significantly increased cost, and also reduces " feel " or the pliability of the product that obtains.Apply the hardness that too many adhesive material has improved the product that obtains, and also can cause " burning ", when adhesive material burns or melt the substrate that passes through adhesion, occur " burning ".Especially in diaper was made, the pliability of completed knocked down products was for another important measured value of estimating disposable absorptive personal hygiene products quality.Therefore, should minimize for the amount that the elastica thigh is adhered to the adhesive of substrate, also keep simultaneously high-caliber creep resistance, high convergent force and minimized burning and hardness.The liquid adhesive silk that the control of adhesive dispensing systems care should be used to is discharged is guaranteed accurate adhesive disposed material and is guaranteed high quality bond to use by minimizing of adhesive.

Similarly, when structure disposable absorptive personal hygiene products, can by being applied to the adhesive pattern of one or two substrate, two or more substrates be adhered to each other.For example, can adhere to two substrates along the marginal portion of substrate.As a result, the adhesive filament of discharging towards substrate must carefully be controlled, to guarantee also to be referred to as " edge control " along edges of substrate and the accurate location in edges of substrate." fly " expectation pattern on the substrate if adhesive filament experiences any non-negligible quantity, the feature of this adhesive has the control of bad edge exactly, and this adversely affects the final structure of the element in the disposable absorptive personal hygiene products.For this purpose, adhesive dispensing systems must carefully be controlled the liquid adhesive silk, to avoid the bad edge control in excessively " flight " and the substrate adhesion.

By contrast, in other adhesive dispense fields, in the adhesive dispense of packing on (for example, box), by with nitrogen or another gas inject liquid hot melt adhesive to form foam glue, the adhesive total amount of using in the coating is minimized.With the gas inject liquid adhesive, routinely, the foaming blender is the large equipment that needs remarkable making space by the foaming blender.Then, foam glue is stacked on the relatively large package combination zone with a kind of pattern.As the result who uses large calmodulin binding domain CaM in packaging field, the pinpoint accuracy of adhesive and accurate control no longer are important design considerations.More specifically, in most of the cases, all spray foam glue with wide pattern, it does not pass through air assisted, rather than foam glue is discharged as the silk that is moved by plant air.In addition, the strong combination that is formed between the large calmodulin binding domain CaM no longer is the significant design Consideration of packaging field.For this purpose, even plant air uses with foam glue in these coatings, also can use the plant air stream of relative low velocity, to be controlled at the flight of the foam glue silk in the packaging field.Thereby, because the plant air of low velocity, so minimized any " flight " and " shooting " problem of using in the packaging field that the low density foam adhesive causes.

Yet when on the elastica thigh that adhesive dispense is used in the disposable absorptive personal hygiene products or at the bottom of the non-woven lining, these low velocity plant airs flow insufficient control adhesive filament.In addition, believe and more low-density adhesive, use together high-speed plant air stream will cause significantly " flight " and " shooting " such as foam glue, this causes low creep resistance and/or the control of bad edge in the disposable absorptive personal hygiene products field.In addition, the large scale of conventional foaming blender prevents the manufacturer extremely contiguous adhesive applicator of the blender location of will foam, but expectation is so located in the nonwoven coating.As a result, in the manufacturing of disposable absorptive personal hygiene products, also do not use foam glue.

Therefore, have the demand to following a kind of adhesive dispense method in the manufacturing of disposable absorptive personal hygiene products, the method provides the improvement characteristic, comprises that creep resistance, the power in the product that obtains is shunk and pliability.

Summary of the invention

In one embodiment of the invention, a kind of method of making the disposable absorptive personal hygiene products comprises mixes gas-pressurized and hot-melt adhesive, to form foam glue.Discharge the foam glue silk towards the elastica thigh that stretches.At full speed plant air affects the foam glue silk, so that this silk is mobile.The foam glue silk is deposited on the elastica thigh of stretching, so that the volume of foam glue expands at the elastica thigh that stretches.The method also comprises with foam glue the elastica thigh that stretches is fixed to the first flat substrate part.

On the one hand, plant air is a plurality of air-sprays, and described a plurality of air-sprays are directed that silk is applied screw.Because adhesive filament moves with screw and the elastica thigh is faster than silk movably, so adhesive filament contacts the elastica thigh that stretches with the second contact point place at first make contact, and begin to twine the elastica thigh of stretching, and between first make contact and the second contact point, stretch.In this, tensile elasticity line thigh accelerates the foam glue silk, so that silk forms the topical adhesive piece at the first make contact that is separated by the fine fibre section and the second contact point place, and the elastica thigh that wherein stretches along with adhesive bond, this fine fibre section fracture.When the fine fibre section ruptures, half one on the either side of fracture or section are recovered rapidly towards corresponding first make contact and the second contact point, and twine the elastica thigh that stretches at the contact point place, to form the topical adhesive piece, this topical adhesive piece is configured to become discrete binding site when the elastica thigh that will stretch is fixed to the first flat substrate part.Separate discrete binding site by adhesive-free or elastica thigh section with stretching of minimum adhesive material, in order to the elastica thigh rigidity between discrete binding site that stretches is not bonded to the first flat substrate part, the therefore elastic force maximization of the elastica thigh of the stretching in the section of making.

During flying and before being stacked on the elastica thigh of stretching, the volume of foam glue begins to expand.In addition, this method comprises, during flying and after being stacked on the elastica thigh of stretching, make foam glue the volumetric expansion overall expansion at least 14%.On the other hand, plant air comprises in the following manner a plurality of air-sprays of guiding, namely silk is applied substantially to seesaw or any desired motion type.Can increase the amount of the gas-pressurized that mixes with the hot-melt adhesive of predetermined, discharge rear foam glue with the gas release of experience to increase.After the foam of this increase caused being fixed to the first flat substrate part, the creep resistance of the elastica thigh of stretching increased.More specifically, the mixing of gas-pressurized and hot-melt adhesive can comprise the gas-pressurized of q.s, be stacked at least 26% overall expansion of the volume of the foam glue on the elastica thigh of stretching with generation, and preferably be enough to produce at least 34% overall expansion of the volume of foam glue.This expansion provides the expectation creep resistance, and such as adding weight for industrial standard, its creep is less than 10%.

This method also comprises by foam glue elastica thigh and the first flat substrate part of the second flat substrate partial fixing to stretching.In certain embodiments, the first flat substrate part and the second flat substrate part can be set to independent substrate, and mode as an alternative, in other embodiments, the first flat substrate part and the second flat substrate can be set to the unitary part (for example, self is folding) of single flat substrate.The disposable absorptive personal hygiene products comprises among the embodiment of elastica thigh of many stretchings therein, this method comprises discharges many foam glue silks, and be deposited on the elastica thigh of many stretchings in adhesive filament before, affect this silk by plant air.

In another embodiment of the present invention, a kind of method of making the disposable absorptive personal hygiene products comprises mixes gas-pressurized and hot-melt adhesive, to form foam glue.At the bottom of the first flat non-woven lining, discharge the foam glue silk.At full speed plant air affects the foam glue silk, so that this silk is mobile.For example, plant air is a plurality of such air-sprays, and it is guided towards each other asymmetrically, with the random adhesive pattern on being created at the bottom of the non-woven lining.Mode as an alternative, plant air is a plurality of such air-sprays, the spirality adhesive pattern on it is created at the bottom of the non-woven lining.On the foam glue silk is deposited at the bottom of the first flat non-woven lining, so that the volume of foam glue expands at the bottom of the first flat non-woven lining.This method also comprise be fixed to the second flat non-woven lining at the bottom of with the first flat non-woven lining by foam glue at the bottom of.

With reference on by reference to the accompanying drawings the basis of detailed description of illustrative embodiment hereinafter, those of ordinary skills will more understand various other feature and advantage of the present invention.

Description of drawings

Fig. 1 is the perspective schematic view of the disposable absorptive personal hygiene products during the various parts of assembling.

Fig. 2 is the perspective view that is applied to the foam glue of elastica thigh.

Fig. 3 is the perspective view that is applied to the foam glue of many elastica thighs.

Fig. 4 is the schematic diagram be used to an embodiment of a kind of adhesive dispensing systems of carrying out method of the present invention.

Fig. 5 is the cross-sectional side view of the exemplary foaming blender that uses in the adhesive dispensing systems of Fig. 4.

Fig. 6 is the perspective view that is used for producing at the elastica thigh exemplary adhesive applicator of foam glue pattern as shown in Figure 3 that uses in the adhesive dispensing systems of Fig. 4.

Fig. 7 is the enlarged perspective of the adhesive applicator of Fig. 6.

Fig. 8 is the rearview of the adhesive applicator of Fig. 6, and it illustrates the interior flow diameter of adhesive and plant air.

Fig. 9 illustrates when using the adhesive dispensing systems of Fig. 4, the diagram of the creep resistance of various adhesive foaming levels and the test result of interpolation weight.

Figure 10 is the top view that is applied to the foam glue of flat substrate.

Figure 11 is along the first cross-sectional side view for the line 11-11 intercepting in another exemplary adhesive applicator of the Figure 13 that produces foam glue pattern as shown in figure 10 at substrate that uses in the adhesive dispensing systems of Fig. 4.

Figure 12 is the second cross-sectional side view along the line 12-12 intercepting of adhesive applicator in Figure 13 of Figure 11.

Figure 13 is the bottom view of the adhesive applicator of Figure 11.

The specific embodiment

Fig. 1 illustrates an embodiment who uses exemplary process of the present invention to make disposable absorptive personal hygiene products 10.Shown in disposable absorptive personal hygiene products 10 be disposable diaper 10, it comprises first end 12 and second end 14 of the waist that is configured to twine the user and is formed at the narrow central portion 16 that extends between user's two legs.Diaper 10 comprises: a flat non-woven lining bottom minute 18(hereinafter is at the bottom of the first substrate 18 or the flat non-woven lining 18); Shank goffering 20, its each longitudinal edge 22,24 along diaper 10 between first end 12 and the second end 14 forms; And second flat substrate part 26(hereinafter be the second flat substrate 26), it is fixed at the bottom of the non-woven lining 18, with sealing shank goffering 20.Form shank gofferings 20 by be fixed at the bottom of the non-woven lining 18 one or more elastica thighs 28 with extended state, in order to provide elasticity around user's shank to diaper 10.As shown in the figure, in the embodiment shown, the second flat substrate 26 is and 18 substrates that separate at the bottom of the flat non-woven lining.However, it should be understood that as an alternative mode, in other embodiments, the second flat substrate 26 can be 18 folding part (not shown) at the bottom of the flat non-woven lining.By hot-melt adhesive 30 with at the bottom of the non-woven lining 18, shank goffering 20 and the second substrate 26 be fixed to one another.

For the manufacturing that realizes diaper 10 with the various benefits in using, by gas-pressurized, inject hot-melt adhesive 30 such as nitrogen, to form foam glue 30, then adhesive 30 is distributed at the bottom of the non-woven lining on 18 or on the elastica thigh 28 that stretches.The exemplary accumulation of foam glue 30 shown in Figure 2 on elastica thigh 28, shown in Figure 3 its are deposited on the many elastica thighs 28, and shown in Figure 10 its is deposited at the bottom of the non-woven lining on 18.Provide and hereinafter describe in further detail the schematic diagram of adhesive dispensing systems 50 in Fig. 4, this system is configured to produce these exemplary accumulations of foam glue 30.

With reference to figure 2, foam glue silk 30 leaves jet expansion 32 under pressurized state, so that foam glue silk 30 similar liquids adhesive pearl substantially soon after discharge.Yet as shown in Figure 2, in case discharge from jet expansion 32, the volume of foam glue 30 just begins to expand.Affect foam glue silk 30 by air-spray, move with screw roughly to cause foam glue silk 30, and be wrapped in mobile elastica thigh 28 on the direction of arrow 34.As shown in Figure 2, when being applied to more mobile elastica thigh 28, foam glue 30 accelerates and stretches, the increase adhesive piece 35 of a plurality of regional areas that this more filament section 36 that causes foam glue 30 formation to pass through adhesive connects.In preferred operations, these thinner silk sections 36 will rupture between adjacent block 35, not stay adhesive between topical adhesive piece 35.During elastica thigh 28 was bonded to substrate 18, these topical adhesive pieces 35 became discrete binding site, and this power that advantageously provides expectation is shunk and the creep resistance characteristic.

The expansion of the volume of foam glue 30 occurs before foam glue silk 30 is deposited on the elastica thigh 28 and afterwards.As the result that the nitrogen in the hot-melt adhesive 30 expands, after jet expansion 32 is discharged, the cumulative volume increase of foam glue silk 30 for example reaches 100%().In this, foam glue silk 30 is less by at the most 50% than the density of the binder liq pearl with equal volume.Should understand, in other embodiments of the invention, the elastica thigh 28(that foam glue silk 30 can be stacked on many parallel stretchings is, at least two elastica thighs 28) on, thereby the application's claim is not limited to single foam glue silk 30 is deposited on the single elastica thigh 28.Also should understand, as shown in Figure 2, foam glue 30 is deposited in causes foam glue 30 substantially to contact with elastica thigh 28 fully on the elastica thigh 28, but in other embodiments, this winding on elastica thigh 28 or accumulation also can cause following situations, be that foam glue 30 only contacts with elastica thigh 28 parts, and another part of foam glue 30 is sagging from elastica thigh 28.

With reference to figure 3, foam glue 30 can be deposited on the many parallel elastica thighs 28 that move along the direction shown in the arrow 34.Foam glue 30 is deposited on the single elastica thigh 28 similar with above-mentioned, every foam glue silk 30 is all discharged from corresponding jet expansion 32, in case and displaced volume just begin to expand.In case be stacked on the corresponding elastica thigh 28, every foam glue silk 30 just accelerates again, so that foam glue 30 stretches, is disconnected the increase adhesive piece 35 of the silk section a plurality of regional areas that separate with formation.When adhering to substrate 18, these adhesive pieces 35 advantageously generate the discrete binding site of every elastica thigh 28.Should be understood that in other embodiment according to the invention, single foam glue silk 30 can stride across many elastica thighs 28 with the movement that rotatablely moves, to form these discrete binding sites.Except the cumulative volume of the adhesive 30 that reduces to be applied to elastica thigh 28, with reference to proving in the figure 9 described test results, compare with liquid adhesive, foam glue 30 unexpectedly represents the creep resistance of raising hereinafter.Therefore, the distribution system of current application and method reduce obviously that adhesive adds and manufacturing cost, improve simultaneously and/or have kept essential bond quality in disposable absorptive personal hygiene products field.

As mentioned summary, Fig. 4 illustrates the exemplary embodiment for the adhesive dispensing systems 50 that distributes one or more foam glue silk 30.Adhesive dispensing systems 50 can comprise following parts, and is commercially available such as the Nordson company in Ohio, USA West Lake city

Spray nozzle and

Nozzle it should be understood that, in the situation that do not depart from scope of the present invention, can use the spray nozzle of any type.Adhesive dispensing systems 50 comprises foaming blender 52, and this foaming blender 52 is connected to adhesive source of supply 54 and gas-pressurized source of supply 56.Foaming blender 52 can operate for gas-pressurized being sneaked into hot-melt adhesive or gas-pressurized being injected hot-melt adhesive.Foaming blender 52 is attached to measuring pump 58 and adhesive dispenser or applicator 60.Measuring pump 58 will remain simultaneously foam glue 30 recirculation and postback bubble blender 52 to the amount of applicator 60 supplies through the foam glue 30 of metering.Thereby the foam glue 30 in the measuring pump 58 is by the 52 maintenance pressurizations of foaming blender with by continuous supplementation.Applicator 60 is discharged foam glue 30 and plant airs, with as mentioned referring to figs. 2 and 3 described, produce foam glue 30 at the bottom of the non-woven lining 18 or elastica thigh 28 on the accumulation of expectation.

In one embodiment, foaming blender 52 be the blender described in the people's such as Ganzer the U.S. Patent No. 7,703,705, it is all disclosed incorporate this paper into as quoting.This exemplary embodiment of foaming blender 52 also is shown in Fig. 5.Foaming blender 52 comprises: hybrid ontology 102, and it has sidewall 104; Tubulose mixing chamber 106, it is by sidewall 104 restrictions; And mixer element 108, it is positioned at mixing chamber 106 inside.Come heating mixer 52 by the heater (not shown) such as the cartridge type stratie that embeds in the sidewall 104.Use is from conventional temperature sensor (not shown), such as the FEEDBACK CONTROL heater of resistance temperature detector, electro-hot regulator or thermocouple.Heater is guaranteed the adhesive material in the blender 52 remained on and can be accepted in the temperature range to distribute by applicator 60.

In an example, foaming blender 52 receives the Bostik2861 hot-melt adhesives and at the about nitrogen of 50psi supply.The blender 52 that will foam is maintained at about 315 degrees Fahrenheits, and it is with about 600rpm operation, so that foam glue 30 leaves foaming blender 52 under the pressure of about 900psi.By these settings, when adhesive dispensing systems 50 during to elastica thigh 28 applying adhesive, foaming blender 52 can operate for every meter elastica thigh 28 and discharge approximately 20-45 milligram adhesive.

Foaming blender 52 comprises adhesive ingress port 110, and it leads to mixing chamber 106.By the supply hose (not shown) that for example is installed in the union elbow 112 in the adhesive ingress port 110 and is connected to union elbow 112 to be threadedly engaged with mode, adhesive source of supply 54 connects communicatively with adhesive ingress port 110 fluids.Between mixing chamber 106 and adhesive source of supply 54, in adhesive ingress port 110, locate flow control element, such as spring-loaded check valve 114.Check-valves 114 with conventional configurations prevents from inflating the upstream that adhesive material infiltrates union elbow 112 and is transported to adhesive source of supply 54.

Foaming blender 52 also comprises the gas access port (not shown) that leads to mixing chamber 106.Gas supply source 56 connects communicatively with gas access port fluid.The adhesive ingress port 110 that can be close in the hybrid ontology 102 is arranged the gas access port.Foaming blender 52 also comprises measurement port 116, and this measurement port 116 relatively extends in the mixing chamber 106 with adhesive ingress port 110.Measurement port 116 receives bend pipe connector 118, and this bend pipe connector 118 is configured to receive the pressure gauge (not shown) for measuring the pressure in the mixing chamber 106.Foaming blender 52 comprises a pair of outlet port 122 that extends in the mixing chamber 106.In Fig. 5, one exports port 122 inactivations, and with stopper 124 it is sealed, and another outlet port 122 receives the union elbow 126 that leads to measuring pump 58 and applicator 60.Therefore, shown in arrow 128, adhesive material enters foaming blender 52 at adhesive ingress port 110 places, and shown in arrow 130, foaming blender 52 is left at 122 places at the outlet port.

Mixer element 108 comprises: central shaft 132, and it is by mixing chamber 106 longitudinal extensions; Cylindrical body 134, its by rigid attachment with central shaft 132 rotation; And fin 136, its from cylindrical body 134 towards mixing chamber 106 sidewall 104 to align inner surface 138 outwards outstanding.Central shaft 132 comprises: first end 140, its contiguous outlet port 122 location; And second end 142, its contiguous adhesive ingress port 110 location.The first end 140 of central shaft 132 is supported for by the lining in the mixing chamber 106 or bearing 144 and rotates with respect to sidewall 104.The thrust bearing 146 that is assemblied in the lining 144 provides thrust loading to support to central shaft 132.Lining 144 and thrust bearing 146 are fitted together, and with the threaded fastener of routine with above both be fixed to hybrid ontology 102.

The second end 142 of central shaft 132 is outstanding by another lining 148 that contiguous adhesive ingress port 110 ground are arranged in mixing chamber 106.Another thrust bearing 150 provides thrust loading to support to the second end 142 of central shaft 132.The second end 142 of central shaft 132 connects with the driving shaft 154 of motor 156 by connection element 152.The thrust bearing 150 of connection element 152 and contiguous connection element 152 is formed by the material with low heat conductivity, so that minimizing heat transmission of 156 from hybrid ontology 102 to motor.Also by stand-off 158 that motor 156 is separated with hybrid ontology 102 with motor 156 and hybrid ontology 102 heat insulations.Stand-off 158 comprises the slit 160 that promotes cooling.Motor 156 drives the dynamic rotation of this driving shaft 154 and central shaft 132, moves fin 136 with the sidewall 104 with respect to mixing chamber 106.

Adhesive material is limited in mixing chamber 106 inside in the zone between the lining 144,148.Lining 144,148 comprises various containment members, and the sealing member helps fluent material is constrained in mixing chamber 106 inside.To cover part 164 and cap 166 is fixed to hybrid ontology 102 with the securing member of routine, and relatively cover protectively hybrid ontology 102 with motor 156.

Fin 136 on the mixer element 108 is along the distribution of embarking on journey of the length (and length of central shaft 132) of cylindrical body 134.The end of each fin 136 and sidewall 104 form dead air space.Along with fin 136 rotation, be sent to adhesive material in the mixing chamber 106 and gas-pressurized and be forced through gap between the adjacent fins 136, be used for gas being mixed, stirring with adhesive material and stir into foam glue 30.Therefore, fin 30 can operate for gas and adhesive are repeated to be divided into rill with respect to the rotation of fixed sidewall 104, and then this stream is reconfigured, to produce basic uniform homogeneous blend or the intermixture of gas and adhesive, wherein gas-pressurized exists in solution.

The fin 136 of making by the initial continuous helical shape screw thread that extends along the length of cylindrical body 134 limits helix shape, and this helix shape is twined along the length of cylindrical body 134 equally.Along with moving by motor 156, central shaft 132 continuous rotations of mixer element 108, the helix shape of fin 136 trend promotes adhesive materials towards adhesive ingress port 110, itself and forward flow inversion towards the gas of outlet port 122/adhesive intermixture.Therefore, foaming blender 52 can operate for to measuring pump 58 and applicator 60 supplying foam adhesives 30.In addition, foaming blender 52 is less than many conventional foaming blender sizes, and this makes it possible to the extremely contiguous measuring pump 58 of foaming blender 52 and applicator 60 location.

Measuring pump 58 can be with the Nordson company in Ohio, USA West Lake city commercially available

The pump that meter uses together.Measuring pump 58 is with such rotating speed operation, and it is similar to the rotating speed that uses during the metering liquid adhesive, and this is because the pressurized foaming adhesive in the measuring pump 58 30 is basic for liquid.For example, foam glue 30 can be with approximately 900psi circulation between foaming blender 52 and measuring pump 58, to keep substantially liquid, until discharge from applicator 60.Then, measuring pump 58 will be sent to through foam glue 30 supplies of metering an applicator 60 hereinafter described.Should be understood that in other embodiments and can use dissimilar pump.

In one embodiment, applicator 60 is the spirality distribution module 202 described in the people's such as Harris the U.S. Patent No. 7,578,882, with its whole open this paper that incorporate into by reference.Also at this embodiment of distribution module shown in Fig. 6-Fig. 8 202.

With reference to figure 6 and Fig. 7, distribution module 202 comprises module body 204, and this module body 204 comprises central body section 206 and lower body section 208.Module 202 also comprises for the clamping or the active trip 210 that nozzle 212 are connected to lower body section 208.Should understand, central body section 206 can comprise valve rod 206a, this valve rod 206a engages with the valve seat 208a that forms in lower body section 208, the flow (in other embodiments, valve rod and valve seat also can be positioned at other positions of distribution module 202) that leads to the hot-melt adhesive among the passage 208b of nozzle 212 with control.At Gressett, further described this active trip 210 in the people's such as Jr the U.S. Patent No. 6,619,566, all openly incorporate by reference it into this paper.Nozzle 212 receives pressurized foaming adhesive 30 and pressing technology air from each service duct (208b, not shown) that is arranged in lower body section 208.

With reference now to Fig. 7 and Fig. 8,, wherein be shown in further detail exemplary nozzle 212.Such as U.S. Patent No. 6,619, more fully to describe in 566, nozzle 212 comprises the cam face 214,216 of inclination, to promote connecting of nozzle 212 and distribution module 202.Nozzle 212 comprises that the first side 218, the first sides 218 are configured to be mounted to the bottom 208 of distribution module 202.The first side 218 comprises adhesive supply port 220 and at least one plant air supply port 222, and it mates with individual adhesive service duct and air feed passage in the distribution module 202.Nozzle 212 limits the approximate wedge shape cross section that comprises the second side 226 and the 3rd side 228.A plurality of frusto-conical protrusion 230 are extended from the second side 226 of nozzle 212, and each projection 230 comprises the adhesive discharge outlet 232 on the far-end that is arranged in projection 230.Adhesive is discharged outlet 232 and is communicated with adhesive passing away 234 fluids, and adhesive passing away 234 is then supplied port 220 with adhesive and is communicated with.At least a portion of adhesive passing away 234 is oriented to and the planar shaped that is parallel to the first side 218 acutangulates, and thereby forms certain angle with the corresponding direction of the movement with line thigh 28 of arrow 34 shown in roughly.The adhesive passing away 234 of exemplary embodiment tilts approximately 20 ° to the first side 218, on the direction that therefore roughly online thigh moves foam glue 30 is discharged outlet 232 from adhesive and is dispensed to elastica thigh 28.

The second side 226 of nozzle 212 also comprises a plurality of Bas Discharged outlets 236, its contiguous each adhesive is discharged outlet 232 and is communicated with air discharging channel 238,240 fluids, air discharging channel 238,240 with the first side 218 of nozzle 212 on air supply port 222 and be communicated with.In exemplary nozzle 212, at the base portion place of frusto-conical protrusion 230, arrange four Bas Discharged outlets 236 with the roughly square pattern of discharging outlet 232 around each adhesive.The air discharging channel 238 of exemplary nozzle 212,240 angled about corresponding adhesive passing away 234 is so that the high-speed plant air jet shown in the arrow 242 is directed to come Autoadhesive to discharge the discharge foam glue silk 30 of outlet 232 tangent.Each Bas Discharged outlet 236 is positioned at the same radial place of the common center that limits apart from the position of discharging outlet 232 in individual adhesive.Therefore, the plant air jet is discharged the roughly the same position in the downstream of outlet 232 and Bas Discharged outlet 236 at adhesive, tangentially rotate around the foam glue silk 30 of discharging.It will be understood by those skilled in the art that by adjusting air discharging channel 238,240 offset spacers and directions with respect to adhesive passing away 234, may change the mobile pattern of silk.In a kind of substitute mode, plant air comprises in the following manner at least two kinds of air-sprays of guiding, and namely it produces the impact that roughly seesaws on silk.

Nozzle 212 also comprises notch 250, this notch 250 is formed in the end relative with the first side 218 of nozzle 212, and contiguous adhesive is discharged outlet 232, discharges outlet 236 with Bas Discharged outlet 232 and adhesive that guiding elastica thigh 28 passes on the second side 226 that is arranged in nozzle 212.Such as more clear illustrating among Fig. 8, notch 250 extends between the second side 226 of nozzle 212 and the 3rd side 228.Notch 250 guiding will be positioned at the every elastica thigh 28 that corresponding adhesive is discharged outlet 232 belows.In the exemplary embodiment, the second side 226 and the 3rd side 228 are configured to form acute angle with the first side 218.In one exemplary embodiment, the second side 226 and the first side 218 form approximately 60 °-80 ° angle.In another aspect of this invention, the 3rd side 228 and the first side 218 form and are no more than approximately 70 ° angle.Advantageously, the angle of the 3rd side 228 promotes the knot that forms in elastica thigh 28 to pass through, and does not cause 28 fractures of elastica thigh.

In operation, elastica thigh 28 is received in each notch 250, and elastica thigh 28 is mobile in the direction shown in the arrow 34.Along with elastica thigh 28 passes for 232 times in adhesive discharge outlet, discharge outlet 232 roughly towards corresponding elastica thigh 28 dispense foam adhesive filament 30, so that with its at least part of being deposited on the elastica thigh 28 from each adhesive.More specifically, foam glue silk 30 can be piled up fully contiguously with elastica thigh 28, perhaps can contact with elastica thigh 28 parts, and other parts of foam glue 30 are sagging from elastica thigh 28.The pressing technology air is discharged from Bas Discharged outlet 236, and shown in arrow 242, it is become tangential guiding substantially towards foam glue silk 30.Along with silk is deposited on the elastica thigh 28, the pressing technology air makes foam glue silk 30 move with screw.Described in more detail as mentioned, elastica thigh 28 accelerates silk 30, and adhesive filament 30 is stretched and formation discrete adhesives piece 35, and when elastica thigh 28 adhered to substrate 18, discrete adhesives piece 35 formed discrete binding site.As shown in Fig. 6 and Fig. 7, the volume of foam glue silk 30 expands at elastica thigh 28.Then, elastica thigh 28 is ready to be fixed to another substrate in the disposable absorptive personal hygiene products 10, such as the shank goffering with formation diaper 10.

As mentioned above, foam glue 30 is highly pressurizeed and remain near liquid form, until discharge from applicator 60.Thereby, when plant air impact or tangentially contact or when moving aloft discharge foam glue silk 30 with other forms, the volume incomplete expansion of foam glue 30.As a result, the density of foam glue 30 keeps being high enough to avoiding flight or the shooting that the high pressure of plant air causes.In addition, even foam glue 30 just began to expand before being stacked into the elastica thigh, foam glue 30 still keeps enough globalities awing, flicks from the elastica thigh avoiding.Foam glue silk 30 still can be fully and accurately control, in order to be deposited on the elastica thigh 28 with the pattern of the expectation that is similar to the liquid hot melt adhesive filament.

18 the time, the bond quality that foam glue 30 represents is similar to the bond quality that liquid adhesive forms substantially at the bottom of using foam glue 30 that one or more elastica thighs 28 are bonded to non-woven lining.For example, use the foam glue 30 of equal volume and the creep resistance that liquid adhesive causes basic identical level.In addition, during combination, foam glue 30 continues to form the discrete binding site along elastica thigh 28, and this provides high-tensile strength to shrink quality.Consider that foam glue 30 comprises the hot-melt adhesive of half normal amount of pact of liquid adhesive, so compare with conventional design, improved pliability or the feel of diaper 10.The expansion of foam glue 30 forms the network structure of hot-melt adhesive and gas effectively, in case be deposited on the elastica thigh 28, this network structure just adheres to elastica thigh 28 effectively.

In another related example, bubbling greatly of adhesive 30 provides the creep resistance of raising for the interpolation binder wt of same amount.With reference to figure 9, test result shows, in operation, has improved the creep resistance amount by apply more foams to adhesive.In this, Fig. 9 comprises chart 280, the average creep percentage that its expression is measured with the interpolation binder wt of every meter elastica thigh 28 of milligram relatively.The 18 rear timeliness after dates of delaying time at 28 hours carry out creep measurement at the bottom of elastica thigh 28 is bonded to non-woven lining, and for foam levels different in the foam glue 30 (0% or liquid adhesive, 14%, 26% and 34%), draw various data point (not shown) at chart 280.By " % foam ", the percentage shown in this figure meaning is to be stacked into during the elastica thigh 28 or afterwards, the overall volume expansion percentage of foam glue experience.Although industrial standard interpolation scope is about every meter 35-50 milligram, also provide this critical field inside and outside test result, in order to can produce Trendline 290a, 290b, 290c, 290d, improve with the different foam levels illustration to foam glue 30.

As shown in chart 280,, add more foams to foam glue 30 and obviously improved the creep resistance that obtains in the phase 28 hours time-delay sampling timeliness.For this purpose, add scope for industrial standard, the first Trendline 290a of liquid adhesive (0% foam) illustrates approximately 25% relatively high creep, and in industrial standard interpolation scope, the second Trendline 290b of 14% foam reduces creep, it is shown descends towards 15%.Show in this test result, the 3rd Trendline 290c of 26% foam further reduces creep compliance, and in industrial standard interpolation scope, the 4th Trendline 290d of the 34% foam creep compliance (for example, less than 10%) of realizing ideal.Therefore, enough gas-pressurizeds are provided in foam glue 30, to form at least 26% foam or overall volume expansion, perhaps even more preferably form at least 34% foam, this uses creep resistance that aspiration level be provided to great majority for the binder wt of each line section chief degree in industrial standard interpolation scope.Should be understood that for some adhesives among other embodiment, specific foam percentage and the creep resistance level that realizes can change based on materials variances.Yet, for all test materials, for the interpolation weight of same amount, be present in foam volume increase that the gas-pressurized volume production in the liquid hot melt adhesive gives birth to by raising and will cause the creep resistance that improves.Thereby, when improving creep resistance, foam glue 30 is bubbled beyond thought benefit is provided, keep simultaneously high bond quality.

In addition, the expansion of foam glue 30 causes the most external of adhesive material or exterior layer to cool off more fast, thereby reduces the possibility that foam glue 30 burns the second substrate 26.More specifically, it is enough warm that foam glue keeps, and with the reliable adhesive combination between the element that is formed on diaper 10, simultaneously enough coolings are burnt at the responsive to temperature substrate avoiding.In addition, test has disclosed following beyond thought benefit, namely uses foam glue 30 to reduce the pressure of clutching that pressure clamp or pressure roll need to apply to be created in high quality bond between elastica thigh 28 and the substrate 18.Thereby, by adhesive dispensing systems 50 of the present invention, can utilize the pressure clamp with less power.

With reference to another embodiment shown in Figure 10, many foam glue silks 30 leave corresponding jet expansion (not shown) under pressurized state, in order to Once you begin discharge from jet expansion, foam glue silk 30 is with regard to the similar liquids adhesive pearl.Also discharge the plant air of a plurality of air-spray forms, and at the bottom of foam glue silk 30 is deposited in non-woven lining, move foam glue silk 30 in the expectation mode before on 18.Substrate is mobile in the direction of arrow 34.Plant air can operate any desired motion for generation of silk, includes but not limited to random motion or screw.In this embodiment, shown in the random pattern of the adhesive on 18 at the bottom of the non-woven lining, plant air applies random motion to every foam glue silk 30.As shown in Figure 10, foam glue 30 forms increase or the overlapping adhesive piece 35 of many regional areas along the length of substrate 18.During elastica thigh 28 was bonded to substrate 18, these topical adhesive pieces 35 became discrete binding site, and this enough power that advantageously provides the combination that obtains is shunk and the creep resistance quality.Be similar to the embodiment of the elastica thigh shown in Fig. 2 and Fig. 3, after discharging from jet expansion, the volume of foam glue 30 begins to expand immediately, and during flying and after being deposited at the bottom of the non-woven lining on 18, foam glue 30 volumes increase at least 14% of total amount.In addition, foam glue 30 produces enough fully covering and the thinner full adhesive coating of substrate 18 by less interpolation.

In another embodiment, applicator 60 comprises the distributing nozzle 302 described in the open No.2010/0327074 of the people's such as Bondeson United States Patent (USP), incorporates its whole disclosures into this paper with reform.Also in this exemplary embodiments of distributing nozzle shown in Figure 11-Figure 13 302.

With reference to Figure 11 and Figure 12, nozzle 302 comprises that the first plant air backing plate 304 separates backing plate 310 and separates backing plate 312 and the first end plate 314 and the second end plate 316 with second with the second plant air backing plate 306, adhesive backing plate 308, first.By a pair of threaded fastener 317 keep having plate 304,306,308,310,312,314,316 whole assembly, this extends through the first end plate 314(and backing plate 304,306,308,310,312 to threaded fastener 317) in corresponding hole body, and extend in the screwed hole in the second end plate 316.Backing plate 304,306,308,310,312 as follows from the order of placement of the first end plate 314 to second end plates 316: contiguous the first end plate 314 of the first plant air backing plate 304(), first separate backing plate 310, adhesive backing plate 308, second separates backing plate 312 and contiguous the second end plate 316 of the second plant air backing plate 306().The second end plate 316 also comprises the projection 318 as align member, this projection 318 extends through air backing plate 304,306, separates backing plate 310,312 and adhesive backing plate 308 in respective upper slit 320.Then, projection 318 is received in the blind hole 322 in the first end plate 314.

The first end plate 314 is for L shaped member roughly and comprise top surface 326, top surface 326 substantially with comprise the first plant air backing plate 304 and separate backing plate 310 and the second planar quadrature of separating backing plate 312 with the second plant air backing plate 306, adhesive backing plate 308 and first.Basic with comprise these identical backing plates 304,306,308,310,312 the threaded securing member of parallel plane side surface 328 receptions.Top surface 326 comprises adhesive entrance 330 and plant air entrance 332.The first end plate 314 also is included in the projection 334,336 of the opposed extension at top surface 326 places, and well-known, it can be used for nozzle 302 is fixed to distributing valve or module 337a.Distribution module 337a comprises valve rod 337b, and this valve rod 337b can engage with valve seat 337c, enters the hot melt adhesive agent flux of the adhesive entrance 330 of nozzle 302 with control.

With reference to Figure 11, the first end plate 314 comprises the plant air access road 338 that is communicated with plant air entrance 332.Plant air access road 338 is communicated with the first air distribution channel 340 and the second air distribution channel 342, and the first air distribution channel 340 and the second air distribution channel 342 are communicated with backing plate assembly 304,306,308,310,312 opposite side respectively.The first air distribution channel 340 is passed backing plate assembly 304,306,308,310,312 at aligned hole 344 places, then passes vertical recessed 346 in the second end plate 316, enters at last the horizontal-extending slit 348 in the second end plate 316.From the plant air of the first air distribution channel 340 enter respective air slit in the second plant air backing plate 306 to 350,352(Figure 13).The second air distribution channel 342 extends in the horizontal-extending recessed 354 in the first end plate 314.From the plant air of the second air distribution channel 342 enter respective air slit in the first plant air backing plate 304 to 356,358(Figure 13).Hereinafter with reference Figure 13 describes air slit 350,352,356,358 layout in more detail.

With reference to Figure 12, the first end plate 314 comprises the adhesive access road 362 that is communicated with adhesive entrance 330.Can use the containment member 364 that is arranged in groove 366 to be sealed in the adhesive entrance 330 at top surface 326 places.Adhesive access road 362 is communicated with adhesive distribution passage 368 and upper level slit 370 in the first end plate 314.This upper level slit 370 is communicated with adhesive backing plate 308 by the corresponding alignment hole body 372,374 that the first plant air backing plate 304 separates with first in the backing plate 310.Adhesive backing plate 308 comprises a plurality of adhesive slits 376, its each have adhesive entrance 378 and an adhesive outlet 380.Should be understood that the second plant air backing plate 306 also comprises adhesive hole body 372, to allow the complete interchangeability between the first plant air backing plate 304 and the second plant air backing plate 306.Yet, in the embodiment shown in Figure 12, prevent that the adhesive hole body 372 in the second plant air backing plate 306 from separating backing plate 312 uses by second.Utilize to separate backing plate 310,312, with corresponding air slit 350,352,356,358 and adhesive slit 376 seal isolation.

Each adhesive slit 376 is arranged in the respective air slot set 350,352,356 of the first plant air backing plate 304 and the second plant air backing plate 306,358 central authorities substantially.Thereby, as shown in figure 13, with the every pair of air slit 350,352 in the second plant air backing plate 306 all guide for the first plant air backing plate 304 in the respective air slit align to 356,358 so that the outlet of the individual adhesive in the adhesive backing plate 308 380.Although clear illustrating not among Figure 13, but air slit 350,352 is assembled towards each other along its length, air slit 356,358 is assembled towards each other along its length, so that all be configured to intersect from the plant air of every pair of air slit 350,352,356,358 ejections.Yet, air slit 350,352,356,358 is not assembled towards the adhesive of their associations outlet 380, this be because corresponding slit to 350,352,356,358 each be comprised in the parallel plane different from the plane that comprises adhesive slit 376.

In the operation, the high-speed plant air that will pressurize is sent to nozzle 302 at plant air entrance 332 places, and then the respective air slit 350,352,356,358 from the first plant air backing plate 304 and the second plant air backing plate 306 is with its discharge.Pressurized foaming adhesive 30 is sent to nozzle 302 at adhesive entrance 330 places, then it is exported 380 places at adhesive and discharge from individual adhesive slit 376.Should be understood that and depend on and to scribble the substrate of adhesive 30, adhesive slit 376 and the adhesive outlet 380 of any number can be set along the length of nozzle 302.

Exert an influence from each air slit 350 the discharge forced air stream that leaves and the processing air stream convergence of leaving from each related air slit 352 and to it.In a similar manner, the corresponding plant air stream that leaves air slit 356 exerts an influence to the air-flow that leaves from air slit 358.The foam glue silk 30 that these asymmetric impacts cause leaving related adhesive outlet 380 on random direction from a side to opposite side or backward and move forward.As a result, foam glue silk 30 formation irregularities, inhomogeneous or random pattern as shown in Figure 10.Yet these adhesive 30 patterns have represented the good edge control to substrate 18, and this is because avoided excessively " flight " or " shooting " during distributing technique.Described with reference to Figure 10 as mentioned, therefore, nozzle 302 can operate for the foam glue silk 30 of piling up random pattern, and the volume of foam glue 30 is 18 increases at the bottom of non-woven lining.In addition, test has disclosed following beyond thought benefit, and namely foam glue 30 is easier to infiltrate the relative porous non-woven material of substrate 18 than corresponding binder liq pearl.As a result, must need less adhesive to add, with non-woven lining at the bottom of 18 form abundant combination.Generally speaking, compare with the result who uses liquid adhesive to present, foam glue 30 produces high quality bond and substantially less adhesive with good edge control to be added.

Although the explanation illustration by its specific embodiment the present invention, although and described in detail embodiment, the scope with accessory claim of being not intended to limits or is limited to by any way this details.Can be separately or be used in combination various feature as herein described with any.Those skilled in the art will be easy to understand additional advantage and modification.Therefore, the present invention is shown in it is not limited to aspect widely and described specific detail, typical equipments and method and illustrative example.Therefore, in the situation of the scope and spirit that do not depart from the cardinal principle inventive concept, can make this details and departing from.

Claims

1. method of making disposable absorbability personal hygiene products, described disposable absorbability personal hygiene products comprises elastica thigh and the first flat substrate part of stretching, described method comprises:

Gas-pressurized and hot-melt adhesive are mixed to form foam glue;

Elastica thigh towards described stretching is discharged the foam glue silk;

The foam glue silk that utilizes the plant air impact to discharge is so that described foam glue silk moves;

Described foam glue silk is stacked on the elastica thigh of described stretching, so that described foam glue expands in the elastica thigh upper volume of described stretching; And

Utilize described foam glue that the elastica thigh of described stretching is fixed to described the first flat substrate part.

2. method according to claim 1, the foam glue silk that wherein utilizes the plant air impact to discharge also comprises:

During flying, the foam glue silk that utilizes a plurality of air-spray impacts to discharge, described a plurality of air-sprays are directed into to described silk and apply screw.

3. method according to claim 2 wherein is stacked into described foam glue silk on the elastica thigh of described stretching and also comprises:

Described foam glue silk stretches during being deposited on the elastica thigh of described stretching, so that described silk forms the topical adhesive piece, described topical adhesive piece is constructed to become discrete binding site when the elastica thigh with described stretching is fixed to described the first flat substrate part.

4. method according to claim 1, the foam glue silk that wherein utilizes the plant air impact to discharge also comprises:

During flying, the foam glue silk that utilizes the impact of a plurality of air-sprays to discharge, described a plurality of air-sprays are directed into to apply to described silk and seesaw.

5. method according to claim 1 also comprises:

During flying and before being stacked on the elastica thigh of described stretching, make described foam glue volumetric expansion.

6. method according to claim 1 also comprises:

During flying and after being stacked on the elastica thigh of described stretching, make described foam glue the volumetric expansion overall volume expansion at least 14%.

7. method according to claim 1, wherein described gas-pressurized and hot-melt adhesive are mixed and also comprise:

Increase the amount of the gas-pressurized that mixes mutually with the hot-melt adhesive of predetermined, to increase described foam glue amount of overall volume expansion with experience after discharge, improve thus the creep resistance of elastica thigh after being fixed to described the first flat substrate part of described stretching.

8. method according to claim 1, wherein described gas-pressurized and hot-melt adhesive are mixed and also comprise:

The forced air of q.s is mixed mutually with described hot-melt adhesive, be stacked into generation the described foam glue on the elastica thigh of described stretching overall volume expansion at least 26%, the industrial standard for the elastica thigh of at least 35 milligrams every meter every stretching adds the creep resistance that weight provides expectation thus.

9. method according to claim 8, wherein described gas-pressurized and hot-melt adhesive are mixed and also comprise:

The forced air of q.s is mixed mutually with described hot-melt adhesive, be stacked into generation the described foam glue on the elastica thigh of described stretching overall volume expansion at least 34%, adding weight for the industrial standard of the elastica thigh of at least 35 milligrams every meter every stretching thus provides and is less than 10% creep.

10. method according to claim 1 also comprises:

Utilize described foam glue with elastica thigh and the described first flat substrate part of the second flat substrate partial fixing to described stretching, to seal the elastica thigh of described stretching.

11. method according to claim 10, wherein said the first flat substrate part partly comprises the first substrate and the second substrate that separates with the second flat substrate, and described method also comprises:

Seal the elastica thigh of the described stretching between described the first substrate and the second substrate.

12. method according to claim 10 wherein limit described the first flat substrate part and the second flat substrate part by single flat substrate, and described method comprises also:

The first paragraph of described single flat substrate is folded on the second segment of the elastica thigh of described stretching and described single flat substrate; And

Seal the described first paragraph of described single flat substrate and the elastica thigh of the described stretching between the second segment.

13. method according to claim 1, wherein said disposable absorbability personal hygiene products comprises the elastica thigh of many stretchings, and described method comprises:

Elastica thigh towards described many stretchings is discharged many foam glue silks;

Many foam glue silks that utilize the plant air impact to discharge are so that described foam glue silk moves;

Every foam glue silk in the described many foam glue silks is stacked on the elastica thigh of the corresponding stretching in the elastica thigh of described many stretchings, so that described foam glue expands in the elastica thigh upper volume of described stretching; And

Utilize described foam glue that the elastica thigh of described many stretchings is fixed to described the first flat substrate part.

14. a method of making disposable absorbability personal hygiene products, described disposable absorbability personal hygiene products comprises at the bottom of the first flat non-woven lining and at the bottom of the second flat non-woven lining, described method comprises:

Gas-pressurized and hot-melt adhesive are mixed to form foam glue;

At the bottom of the described first flat non-woven lining, discharge the foam glue silk;

The foam glue silk that utilizes the plant air impact to discharge;

On being stacked into described foam glue silk at the bottom of the described first flat non-woven lining, so that described foam glue upper volume at the bottom of the described first flat non-woven lining expands; And

Be fixed at the bottom of the described second flat non-woven lining at the bottom of utilizing described foam glue with the described first flat non-woven lining.

15. method according to claim 14 also comprises:

The foam glue silk that utilizes plant air impact to discharge, the random adhesive pattern on being deposited at the bottom of the described first flat non-woven lining with generation.

16. method according to claim 14 also comprises:

The foam glue silk that utilizes plant air impact to discharge, the spirality adhesive pattern on being deposited at the bottom of the described first flat non-woven lining with generation.

17. method according to claim 14 also comprises:

During flying and before on being stacked at the bottom of the described first flat non-woven lining, make described foam glue volumetric expansion.

18. method according to claim 14 also comprises:

During flying and after on being stacked at the bottom of the described first flat non-woven lining, make described foam glue the volumetric expansion overall volume expansion at least 14%.

19. method according to claim 14 also comprises:

At the bottom of the described first flat non-woven lining, discharge many foam glue silks;

Many foam glue silks that utilize the plant air impact to discharge;

On being stacked into described many foam glue silks at the bottom of the described first flat non-woven lining, so that described foam glue upper volume at the bottom of the described first flat non-woven lining expands.