CN100381278C - Stretchable web - Google Patents

Abstract

The present invention relates to stretchable webs (10) having a plurality of elongated cells (12), and a retractive force mechanism to provide increased retractive force of the web when stretched in a given direction. The stretchable webs are useful in disposable garments such as diapers, bandages and other hygiene material so that the material fists closely without slipping off.

Description

Stretchable fabric

Technical field

The present invention relates generally to stretchable fabric (web), particularly relates to the fabric with the lower material manufacturing of elasticity that is used for clothes.The invention still further relates to the laminate that comprises this stretchable fabric, wherein this laminate has lower elasticity.

Background technology

Stretchable fabric is used for disposable and clothes non-once, to increase the comfortableness and the fit of clothes.This stretchable fabric is as armband (armband), waistband and other inserts of clothes.Stretchable fabric is used for whole clothes makes whole clothes have more comfortable fold (drape).

In the disposable and non-once clothes usually used stretchable fabric comprise elastomeric material.The major defect of elastomeric material is the manufacturing cost of this material.Therefore, wishing has a kind of stretchable fabric, and it can finish desirable various uses again by the lower cost materials manufacturing.Another shortcoming of elastomeric material is that elastomeric material stretches along all directions usually, therefore needs SC when producing.

Having some flexible mesh materials is known in this area, but knows that also this material has very poor retractility.In other words, when mesh material when specific direction applies biasing force stretches easily, but withdrawal force is not enough to satisfy the demand and uses many purposes of elastomeric material.Therefore, making mesh material with enough power by non-elastic material will be favourable with the elastomeric material of replace more expensive.

The United States Patent (USP) of authorizing people such as Curro discloses the elastic fabric in the three-dimensional crack with holes of a kind of (apertured) with elongated porosity for 6,452, No. 063, and its content is by being incorporated into this with reference to whole.This fabric is stretchable along the long axis direction perpendicular to this elongated porosity.Though it is this three dimensional fabric provides good tensile properties, restorative very poor.

United States Patent (USP) 6,452, another shortcoming of No. 063 three dimensional fabric comprise that partly shape ratio (length of main shaft and the length of minor axis) owing to hole is in the tensility matter that reduces that causes in about scope of 1.5 to 5.And, because having, three dimensional fabric can pay particular attention to aborning along all directions polygonal shape mesh that stretches.In addition, this three dimensional fabric is not providing enough recoveries after given direction stretches.Therefore, this three dimensional fabric for example requires seldom to use in good draftability and the good restorative diaper that does not have so that clothes are very next to the shin to slide in disposable garment very next to the shin.

With the description of known materials, fabric, some shortcomings that method and apparatus is relevant is not to want to limit the present invention among the embodiment that does not comprise these known items.But each side of the present invention can comprise the one or more of known materials, fabric, method and apparatus and not have shortcoming as described herein.

Summary of the invention

The feature of the embodiment of the invention provides stretchable fabric and/or the laminate with enough withdrawal forces, need to be used in the clothes (for example, diaper and other tight clothes next to the shin) of these character.The supplementary features of another embodiment provide fabric and/or the laminate that the enough less expensive materials of energy are made.These and other features realize by some embodiments of the present invention.

According to these features of the embodiment of the invention, a kind of stretchable fabric is provided, it comprises the elongated cells (cell) with major axis and minor axis.These stretchable fabrics comprise the elongated cells of alignment, so that the mechanical elasticity of the elongated porosity (aperture) perpendicular to this alignment to be provided.This stretchable fabric comprises that also withdrawal force mechanism is to provide the withdrawal force of increase along the mechanical elasticity direction.The various embodiment that the specification that is discussed in more detail below is partly described provide needed withdrawal force device when when assigned direction stretches to increase the withdrawal force of this fabric.

According to additional embodiments of the invention, provide laminate that comprises this Stretchable fabric and the absorbent clothes that comprise this stretchable fabric.Embodiments of the invention also comprise the method for making this Stretchable fabric, and the method for making this laminate that comprises this Stretchable fabric.

Especially, a kind of stretchable fabric is provided, comprises: have the three dimensional fabric of the elongated mesh of a plurality of alignment, so that the mechanical elasticity perpendicular to the slot crack of this alignment to be provided, and withdrawal force mechanism, the withdrawal force of enhancing is provided with the direction along mechanical elasticity.

A kind of method of making above-mentioned fabrics further is provided, and this method may further comprise the steps: form the three dimensional fabric of the elongated porosity with a plurality of alignment, so that the mechanical elasticity perpendicular to the elongated porosity of this alignment to be provided; And for this three dimensional fabric provides withdrawal force mechanism, to increase the withdrawal force of this fabric.

A kind of laminate also is provided, and it comprises above-mentioned fabrics and be laminated to the extra play of this fabric, and a kind of clothes with absorbability are provided, and it comprises above-mentioned fabrics.

In addition, provide a kind of stretchable fabric, comprising: the fabric that inelastic materials is made; And the combination of the pinwheel of the three-dimensional mesh in this inelastic materials, this combination comprises the center mesh and centers on a plurality of meshes of this center mesh at least in part, to produce elasticity.

Description of drawings

Fig. 1 is the vertical view that is used to form the constituent material of Stretchable fabric of the present invention.

Fig. 2 a is the passage (lane) that utilizes non-porous film with the vertical view of the embodiment of the invention that increases withdrawal force.

Fig. 2 b utilizes the vertical view of at least two kinds of elongated cells shapes with the embodiment of the invention of increase withdrawal force.

Fig. 3 a is the axonometric drawing of the embodiment of the invention, and wherein two of Fig. 1 film combinations are together to increase withdrawal force.

Fig. 3 b is the vertical view of two embodiment of the present invention, and wherein the layer of web material of two overlappings is overlapped at a certain angle, and in one embodiment, this layer has the mesh of same size, has the mesh of different size in another embodiment.

Fig. 4 a is the axonometric drawing of the embodiment of the invention, and wherein enhancement Layer is attached to the fabric of Fig. 1 to increase withdrawal force.

Fig. 4 b is the vertical view of the embodiment of the invention, wherein the nonwoven enhancement Layer be attached to Fig. 1 fabric to increase withdrawal force, first adhesive-bonded fabric has slit, second adhesive-bonded fabric has hole, the 3rd adhesive-bonded fabric has the IMG activation.

Fig. 5 is the cutaway view of material shown in Figure 4.

Fig. 6 is the vertical view of the embodiment of the invention, and wherein bridging element extends the minor axis across this elongated hole.

Fig. 7 is the vertical view of the embodiment of the invention, and wherein the strand of second material (strand) puts on this fabric to be used as bridging element.

Fig. 8 is the vertical view of the embodiment of the invention, the strand that wherein applies second material across the center of the major axis of this elongated hole with as bridging element

Fig. 9 is the vertical view of the embodiment of the invention, and wherein mesh and bridging element have the offset pattern that reduces.

Figure 10 is the vertical view of the embodiment of the invention, and wherein bridging element disconnects.

Figure 11 is the vertical view of the embodiment of the invention, and wherein mesh is arranged to pinwheel (pin-wheel) pattern, three such patterns shown in it.

The specific embodiment

Terminology used here " elasticity " is meant that material is stretchable when applying bias force, that is, tractile.Preferably, this term " elasticity " expression material is stretchable to few percent 60 (after promptly stretching, the length of skew be at least its not deflected length that loosens percent 160), and after the elongate edge of stretching unclamps, recover percent 55 of its amount of elongation at least.The example of supposing is a sample that can be stretched to 1 inch material of at least 1.6 inches, when be stretched to 1.6 inches and unclamp after will return to length no longer than 1.27 inches.Many elastomeric materials can be elongated by more than percent 60 (promptly, the length of loosening than them percent 160 much bigger), for example, elongate percent 100 or more than, and after tensile force discharges, many this materials will return to their initial length of loosening substantially, for example, they the length of initially loosening percent 105 in.No matter all material is elastomeric material or non-elastic material, compares with other materials, all has relative elasticity.

Terminology used here " tensile " is meant that any material can be stretchable along at least one direction, can elongate when applying bias force.Preferably, it is extending to not suffering wasting breaking (promptly at least about percent 60 that material described in this term " tensile ", after the stretching, the length of biasing be at least its not offset lengths of loosening percent 160), but, after the elongate edge that stretches discharged, it can not recover more than percent 55 of amount of elongation.

Terminology used here " clothes " is meant any kind clothes that can wear.Term apparel comprises articles for use, women sanitary articles of work clothes, underwear, pants, shirt, overcoat, gloves, socks, diaper, disposable underclothes, adult-incontinence etc.

Here used word " adhesive-bonded fabric " be meant have a mutual braiding but the single fiber that does not weave in any regularly repeating mode or the fabric of line structure.In the past, adhesive-bonded fabric forms by the whole bag of tricks, for example molten method, spun-bond process and the hot sticky carded webs method of blowing.

Here used word " spot gluing " (point bonding) is illustrated in the one or more fabrics of spot gluing of a plurality of dispersions.For example, focus is bonding to be related generally to be bonded between together one or more layers roller by heating, such as, for example Diao Ke pattern roller and anvil roller (or smooth calender roll).The roller of this engraving is to form pattern in its surface in some way, make whole fabric not on its whole surface by bonding, and calender roll has flat or smooth surface usually.As a result, develop the various patterns that are used for engraved roll for function and reason attractive in appearance.

Spot gluing will include but not limited to other adhering methods, such as small size adhere to, ultrasonic and pressure is bonding.

Here used word " pressure is bonding " is meant a kind of method, and fabric (or a plurality of fabric) is placed between two elements that this fabric is exerted pressure, with the various constituents of bonding this fabric (or a plurality of fabric) in this zone of exerting pressure.

Here used word " basically " is meant that the character or the parameter that provide can change about 20% from described value.

Here used word " ultrasonic bonding " is meant a kind of method of implementing, and for example, by between sonic horn and the anvil roller, as authorizes No. 4,374,888, the U.S. of Bornslaeger or authorize people's such as Goodman No. 5,591,278, United States Patent (USP) disclosed material.The ultrasonic this area that is bonded in is known, and various sonic horn and anvil roller can for example, have been bought from Danbury city, Kang Naitige state Branson Ultrasonics etc. from the market.In general, the bonding location of these devices in these layers produces the dither energy of melting heat plastic component and bonds them together.

In whole specification, word " retraction mechanism " expression increases any mechanism of the withdrawal force of fabric, or material, or processing method.Various retraction mechanisms are disclosed in this application, and the present invention expection comprise described mechanism and any other known or at the retraction mechanism of finding thereafter.

The present invention relates generally to the Stretchable fabric with elongated cells, and this mesh has major axis and minor axis.Preferably, this fabric is stretchable along the direction perpendicular to the major axis of this mesh substantially.Given draw direction can be machine direction (MD), laterally (CD or TD), or this machine direction and should be laterally between at angle.Following additional embodiment provides the improved treatment characteristic of this stretchable fabric in conversion process.

First embodiment with this fabric of retraction mechanism comprises the passage of the nonporous film that the voided films passage is separately arranged.This fabric transversely be elongate and beginning shrink along machine direction because no hole path prevention buckling (buckling), and form desirable horizontal withdrawal force.In similar texture, the part of this fabric can have varying sized elongated cells.

Second embodiment of Stretchable fabric comprises adhesive-bonded fabric or attached to the nonporous film layer of a plurality of spaced points.Again, the buckling power of this extra play produces desirable withdrawal force.Preferably align in the bonding of this spaced point, with the cross directional stretch of avoiding forbidding along machine direction.A kind of form of this embodiment is added adhesive-bonded fabric with the form of band ripple or fold during being included in vacuum lamination, and another kind of form is shaped with extruded lamination, or by after the IMG activation with the adhesive-bonded fabric coating, try hard to keep for buckling and hold the machine direction rigidity to weaken this laminate while on across machine direction.The another kind of form of this embodiment is utilized slit or the non-woven material of hole is arranged.Under the situation of the non-woven material of slit, preferably this slit aligns with this elongated cells.And, utilize the non-woven material that little by little stretches, for example, the non-woven material of mutual grinding tooth (IMG) activation.Because the consideration that adds in this application helps with elastomeric adhesives non-woven material being bonded to mesh.Bonding can applying with various patterns comprises zigzag, linear, omega shape or spirality.

The third embodiment of the present invention is included in the two-layer stretchable fabric that spaced point or partitioning portion bond together, to increase buckling power and to increase horizontal withdrawal force.This lamination can be by having elongated porosity vacuum lamination or any known method of attachment of two films realize.In addition, this two-layer stretchable fabric can be offset, make the major axis of elongated cells of this ground floor and the second layer elongated cells major axis at angle.At last, this two-layerly can have different mesh counts and mesh size.

The 4th embodiment of Stretchable fabric comprises along the bridging element of assigned direction extension across this elongated cells.This bridging element will stop the expansion of this mesh minor axis, thereby increase withdrawal force.This bridging element can form in some kinds of modes.In first kind of mode (implementation), this bridging element can be by forming with the same material of Stretchable fabric.This bridging element can be three-dimensional, perhaps can be two-dimentional in this mode.In second in the mode, this bridging element can be formed by the strand of the independent material of overlapping this Stretch material.These strands can with the major axis centering of elongated cells, perhaps they also can be applied to and not consider their positions with respect to elongated cells.This strand can be an elastomeric material, LYCRA  for example, and perhaps elastic adhesive, or they can be made of non-elastic material.

The another kind that forms bridging element considers it is to be offset between the bridging element of adjacency.This bridging element preferably can have up to slightly more than half the skew of increase of elongated cells length, or approximates the skew that reduces of elongated cells length 1/4th greatly.Another consideration is that this bridging element can be used for increasing the stability in this fabric treatment procedure and the transfer process.This bridging element can be configured to keep the globality of this fabric in processing procedure, but make its fracture by the user then, or when finishing, by this fabric tension being surpassed the elastic limit of this bridging element, but in the elastic limit of this fabric, make its fracture near processing.This needs bridging element to have the stretching threshold value lower than this fabric.This can realize by selecting bigger flexible textile material and less flexible bridging element material, bridging element relatively be approached realize.

The 5th embodiment of the present invention comprises pinwheel (pinwheel) combination of mesh.This pinwheel combination preferably includes the center mesh that is centered on by at least two other meshes.For example, two " C " shape meshes can partly be centered around the central circular hole.Perhaps, elongated mesh can partly be centered on by the mesh of four " comma " shapes.Also can be with other mesh.This pinwheel structure forms mesh in mesh, second mesh breaks to make the mesh of winning can break then, forms the withdrawal force of classification and for the reaction of the classification of pulling force.Stretchable fabric of the present invention comprises the pinwheel combination of the fabric and the three-dimensional mesh in this non-elastic material of non-elastic material, and this combination comprises center mesh and a plurality of mesh that partly centers on, to produce elasticity.As in that Fig. 2 to Figure 11 saw, thermoplasticity or the elastomer thin film of stretchable fabric 8 by forming, or adhesive-bonded fabric 10 partly forms.The film of this formation or adhesive-bonded fabric 10 preferred and various retraction mechanism 26 combinations are to form stretchable fabric 8 of the present invention.Stretchable fabric of the present invention preferably includes the three dimensional fabric of inelastic materials of the elongated cells with alignment to provide perpendicular to the mechanical elasticity of the elongated cells of this alignment and withdrawal force mechanism provides increase with the direction in mechanical elasticity withdrawal force.Though the preferred embodiments of the present invention comprise three dimensional fabric, one skilled in the art will appreciate that this stretchable fabric can be the flat film that forms, and has elongated mesh to give its tensility.

With reference to figure 1, the film of this formation or adhesive-bonded fabric 10 comprise a plurality of elongated cells 12.This elongated cells 12 is normally three-dimensional, has a wall that extends to basal surface from the top surface of this fabric.Elongated mesh 12 preferably has hole at basal surface.Elongated mesh 12 has major axis and the minor axis of using length " L " and width " W " expression respectively.Simultaneously the ratio of length " L " and width " W " can change, and in a preferred embodiment, length " L " is between about 5 to 15 times of width " W ", and in another embodiment, length " L " is 10 times of width " W ".As shown in Figure 1, this mesh 12 is with the alignment pattern of the fragment of brick of skew, and its major axis is parallel to machine direction.The advantage that major axis is parallel to machine direction is that this film is non-stretchable along machine direction basically, therefore, handles easily in the commerce of expection is used.The major axis of elongated cells 12 can align along any direction, and this fabric 10 has the elasticity perpendicular to the major axis alignment direction of this mesh 12 usually.

Mesh 12 can have line space 18 between the row of skew.In a preferred embodiment, this line space is about 1.75mm, but for various purposes, this line space can change widely.The mesh 12 of alignment can have the line space 20 of alignment, and in a preferred embodiment, this line space is about 3.5mm, but also can change widely according to purposes.The mesh of alignment also can have length spacing 22, and in a preferred embodiment, this length spacing is about 5.7mm, but can change according to purposes.Being provided with of elongated hole 12 can form alignment angle 24, and it is about 72 ° in a preferred embodiment, but still can change widely.The straight line that this alignment angle preferably intersects on (i) and the summit of the hole of the adjacent meshes of two row, and (ii) be parallel to the angle that forms between the straight line line of minor axis in hole 12.Therefore, if mesh 12 at adjacent capable non-migration, this alignment angle 24 will be zero so.

The three dimensional fabric 10 of above-mentioned Fig. 1 can be described as a kind of thin-film network fabric material of formation.The advantage of this mesh material is that it is a three dimensional fabric, so mesh 12 has the wall that extends along Z direction (perpendicular to the plane of mesh material).As mentioned above, such as at United States Patent (USP) 6,452, the fabric described in No. 063 is requisite withdrawal force mechanism in many application not.Therefore, preferably, withdrawal force mechanism 26 is applicable to the mesh material 10 of various preferred embodiments of the invention, so that this requisite withdrawal force to be provided.Alternatively, one of size of the variation of the passage of the offset row that this fabric 10 can be by mesh 12, pore-free material, mesh 20 etc. forms and has this requisite withdrawal force.

The film 10 that forms is made of various thermoplastic materials, preferably, is made of more inelastic thermoplastic material.In a preferred embodiment, use polyethylene.Also can use other polymer, comprise, for example, the copolymer of polyethylene and other monomers is as propylene, butylene etc., polypropylene homopolymer, polypropylene homopolymer, or the copolymer of polypropylene and butylene etc., the polymer of styryl comprises styrene and butadiene, butylene, polypropylene, poly block copolymer and composition thereof.

Shown in Fig. 2 a and Fig. 2 b, can form passage 28 and 30, to increase the withdrawal force of fabric 10.In Fig. 2 a, passage 28 is two-dimentional, and passage 30 is three-dimensional.This embodiment can prepare by vacuum or hydroforming film on having by the screen of the mutual separated multirow eyelet of imperforated screen material.In Fig. 2 b, passage 28 has less mesh, and passage 30 has bigger mesh.Needn't have same shape, size or relevant axis ratio with bigger mesh in the passage 30 than fine mesh in passage 28, bigger mesh has shape described herein, size and relevant axis ratio usually in the passage 30.In Fig. 2 a and Fig. 2 b, passage 28 increases withdrawal force.In Fig. 2 a and Fig. 2 b, the direction 100 of elongation is perpendicular to this elongated mesh 12.

Withdrawal force mechanism 26 shown in Fig. 2 a is included in the two-dimensional channel 28 between the passage 30 of three-dimensional elongated cells.This whole fabric 8 is made of mesh material 10, and wherein mesh 12 only exists only in the three-dimensional channel 30, and is separated by two-dimensional channel 28.The respective width of this two-dimensional channel 28 and three-dimensional channel 30 can change according to purposes, but in a preferred embodiment, this three-dimensional channel 30 and two-dimensional channel 28 are wide.

Withdrawal force mechanism 26 shown in Fig. 2 b is included in the little mesh passage 28 between the big mesh passage 30.Mesh 12 in passage 28 is less than the mesh in the passage 30 12 and the withdrawal force of increase is provided.Except the particularly preferred embodiment shown in Fig. 2 a and Fig. 2 b, passage 28 can be made of the imporosity mesh 12 of three-dimensional, and passage 30 can include the elongated cells 12 of hole.This imporous mesh 12 can have same shape so that continuity to be provided with the mesh 12 that hole is arranged on texture.

Withdrawal force mechanism 26 shown in Fig. 3 a comprises the second enhancement Layer fabric 10 of the fabric 10 that is adhered to existing formation.Preferably, the fabric spot gluing of these two formation, though and there is no need accurately overlappingly, preferred alignment makes the alignment that is parallel to each other of this elongated porosity.Use for some, wish from film 10 these withdrawal force mechanisms 26 of skew that form, so that this hole is not accurately parallel.For example, can wish to be offset 10 °.The second layer of the fabric 10 that forms is called enhancement Layer 32 in Fig. 3 a.Preferably, this enhancement Layer 32 passes through discrete bond 34 spot gluings to form fabric 10.This discrete bond 34 can be by being formed by purposes or the desirable various spot gluing methods of material therefor.The direction of elongating generally is perpendicular to mesh 12.

Alternatively, enhancement Layer 32 can be arranged to have the mesh 12 perpendicular to the mesh 12 of fabric 10, shown in Fig. 3 b.The mesh 12 of enhancement Layer 32 can have same size with the mesh 12 of fabric 10, shown in the bottom of Fig. 3 b.The mesh 12 of enhancement Layer 32 can have the size different with the mesh of fabric 10, shown in the top of Fig. 3 b.Direction 100 general and 12 angles at 45, hole of elongating.

With reference to figure 4a, preferably, withdrawal force mechanism 26 is enhancement Layers 32, but enhancement Layer 32 can comprise the material different various materials used with fabric 10.Specifically, it is believed that this enhancement Layer 32 can be the withdrawal force of thin-film material, non-woven material, constriction (necked) non-woven material, increment stretched non-woven material, two-dimentional porous non-woven material, slit non-woven material, textile material, porous membrane, the porous membrane with elongated cells, the laminate fabric 10 that maybe can increase formation and the tensility of fabric 10 is not caused the other materials of adverse effect.Particularly, netted non-woven material is the material of effective enhancement Layer 32.Preferably, by the spot gluing 34 bonding enhancement Layers 32 that disperse to form film 10.Discrete bond 34 can form by various spot gluing methods according to purposes and used material, and those skilled in the art can by any method in these methods form bonding 34 of dispersion by guidance and the technology known in the art that provides here.

Fig. 4 b illustrates three kinds of different enhancement Layers (from the top to the bottom): (i) the nonwoven enhancement Layer of slit nonwoven enhancement Layer (ii) two-dimentional porous nonwoven enhancement Layer and (iii) increment stretching (or activation).This figure also illustrates with adhesive or elastic adhesive 36 with back side pattern and front pattern, or pattern bonded in the enhancement Layer 32 of fabric 10 in a zigzag.

Fig. 5 is the cutaway view of the fabric 8 shown in Fig. 4 a.Preferably, comprise that this withdrawal force mechanism 26 of enhancement Layer 32 will be adhered to the thin layer 10 of formation by the spot gluing 34 of a plurality of dispersions.As shown in Figure 5, the spot gluing 34 of dispersion can be not always between film 10 that forms and enhancement Layer 32, form bonding because it can drop in the hole 12 of film 10 of formation.In fact bonding 34 with material adhesive this dispersion together not can be used for forming aesthetic pattern on enhancement Layer 32, perhaps by provide bonding at random just be used for guaranteeing enough bonding.

To Figure 10, preferably, this withdrawal force structure optimization comprises a series of bridging elements 38 with reference to figure 6, and its length 14 that is approximately perpendicular to elongated cells 12 is across extension.Bridging element 38 increases withdrawal force along elongating direction 100, and this elongation direction 100 is approximately perpendicular to the length 14 of mesh 12.Therefore, this withdrawal force mechanism is also included within the bridging element in the stretchable fabric.

With reference to figure 6, preferably, this mesh 12 exists with staggered equably brick pattern, and bridging element is across the center of mesh 12.In this pattern, this bridging element 38 is half length of skew mesh 12 mutually.Bridging element 38 can be two-dimentional, that is, only exists only on the upper surface, and perhaps also can be three-dimensional, that is, have the wall that extends to mesh 12 along the z direction.Bridging element 38 can be used with the same mesh material of fabric 10 and form, and as illustrating in greater detail below, bridging element 38 can form with the material of identical or different type, and this material sequences ground placement is across mesh 12 or on mesh 12.

For example, Fig. 7 illustrates the strand 40 that is parallel to the interpolation material that elongates direction 100 and apply perpendicular to the length of mesh 12.This strand 40 can be made of any material that can be adhered on the fabric 10, bonding agent particularly to be described in detail below and elastomeric adhesives, and it comprises film band and non-woven textile.Except they perpendicular to the length 14, preferably, strand 40 is not provided with reference to the position of mesh 12, therefore, all places on mesh 12 forms bridging element.But in Fig. 8, preferably, strand 40 is arranged so that length 14 centerings of bridging element 38 along mesh 12.

Fig. 9 illustrates mesh 12 and is arranged to the staggered pattern of less offset, makes bridging element 38 be offset the length of about 1/4th meshes 12.In Figure 10, shown bridging element disconnects.In product, but be not in processing procedure, this wishes to have elastomeric place in hope.For example, has the bridging element 38 that elastomeric fabric 10 can comprise the comparison inelastic materials.This bridging element 38 will reduce undesired stretching in the process of handling fabric 10.Do not wish to stretch the processing stage after, user or processor can be stretched to this fabric 10 degree of bridging element 38 fracture, so that fabric 10 is resilient in final products.In addition, the bridging element 38 of fracture makes the clothes made from this fabric 10 be fit to wider size.

Figure 11 illustrates the various combinations 42 of mesh 12, and it can give the withdrawal force characteristic of raising.The common trait of performance is by a plurality of center meshes 44 that partly center on around mesh 46 in these combinations 42.For example, in the combination shown in the top of Figure 11 42, circular central mesh 44 is semicircular by two, or circular " C " shape mesh 46 partly centers on.Except mesh 46 multi-angles that partly center on, all the other are same at the upper right quarter of Figure 11.

The combination 42 shown in the lower left quarter of Figure 11 have elongated center mesh 44 and a plurality of around the mesh 46 (for the sake of clarity each combination 42 profile of drawing) in crack with holes.The mesh that hole is arranged 46 that this centers on has different shape.Mesh 46 around some can be crooked (for example, as comma), and other only is circular.Between the combination 42 is mesh 12, and this mesh 12 is not the part of any combination 42.Shown various pinwheel structures are formed on the mesh 12 in the mesh 12, thereby improved elastic performance is provided.

Below with reference to following example explanation the present invention, this example does not limit the present invention.

Example

Table 1 illustrates with the effect of three different conditions to the sluggish character of mesh material with withdrawal force mechanism: (i) oval cells self---" tester "; (ii) one of two layers of oval cells is overlapped on another top; And when (iii) having 10 one-tenth 30 ° of angles of oval cells enhancement Layer and this fabric.

Following material is used to form the sample shown in the table:

Comparative sample: (mil) is thick for 1 mil, and the 10:1L/D hole is along 5.5 of horizontal per inch.Obtain the nested brick pattern with 36% aperture area shown in Figure 1 like this.Prescription: 86.3% Chevron 4571 high density polyethylene (HDPE)s (HDPE), 5.7% A110313 (TiO ₂Concentrate), 3% P3155 (surfactant concentrate), 5% Exxon P3155 (PP);

Sample 1: the two-layer comparative sample that connects, the major axis in the hole in its top layer is parallel to the major axis in the hole in the bottom bondingly.

Sample 2: the two-layer comparative sample that connects, the major axis in the hole of aliging in its top layer and the major axis in the hole in the bottom depart from 30 ° bondingly.

Above-mentioned each sample is to stretch on 27.00095 the cupping machine MTS in model, and this cupping machine has the commercially available test job software of MTS Systems company from Minnesota State Minneapolis city.This MTS device comprises 100N load detector (load cell), and this material elongates sluggish (hysteresis) with two-wheeled 100% and tests.Measuring length is 50mm, and crosshead speed (cross head speed) is 20 inch per minute clocks, and does not have the retention time between loading and unloading operation process.Test result is recorded in the following table 1.The withdrawal force that the bigger value that writes down in the table (gm-power/inch) expression is bigger.

Table 1

	Reference substance	Sample 1	Sample 2
				First round load
20% elongates	9.95	82.40	51.80
				40% elongates	10.80	129.92	56.95
60% elongates	13.26	179.13	73.13
				80% elongates	26.66	242.24	131.37
First peak load	27.33	220.83	131.98
				First round unloading
20% elongates	-0.39	-0.96	-0.88
				40% elongates	-0.85	-1.03	-0.82
60% elongates	-0.09	-0.93	-0.84
				80% elongates	6.92	89.94	31.52
Second wheel load
				20% elongates	7.52	-0.28	0.59
40% elongates	6.81	13.16	8.93
				60% elongates	8.62	44.46	20.77
80% elongates	23.30	154.87	110.60
				Second peak load	24.84	155.68	118.52
Second takes turns unloading
				20% elongates	-0.74	-0.79	-0.75
40% elongates	-0.53	-0.66	-0.94
				60% elongates	-0.09	-0.78	-0.88
80% elongates	6.60	35.17	28.25
				The unloading peak load	14.55	62.00	61.62
Second takes turns permanent setting	5.84	33.98	30.63

Data in the table 1 show, when when given direction stretches, the sample that comprises enhancement Layer provides fabulous withdrawal force for the mesh material.A combination (sample 1) that overlaps two of oval cells same layers on another top obtains comparison and extraordinarily carries and unload forces than sample big at least 5.Because this sample has two-layer same layer, people's expection sees that power increases twice, but sample 1 provides 5 times increase, and this is beyond thought.This result shows that the rising of the withdrawal force of enhancing is owing to two layer one decks overlaid on another layer top produces.When the enhancement layer of oval cells has 30 ° of angles (sample 2), loading and unload forces are compared bigger 3 times than sample at least.In second took turns, loading and unload forces were more much smaller than the first round, and in the first round, the power that applies is with the different proportional variations of elongation percentage.Therefore, these results represent that the mesh material with two layers of oval cells has requisite withdrawal force so that improved tensility and good recovery characteristics to be provided.

Though illustrated and described specific embodiments of the invention, but will be appreciated that, the example of preferred embodiment is limited in some structure of Stretchable fabric, but those skilled in the art will be appreciated that, under the situation that does not break away from spiritual essence of the present invention and scope, can carry out variations and modifications to preferred embodiment as described herein.

Claims (31)

1. stretchable fabric comprises:

Three dimensional fabric with elongated mesh of a plurality of alignment, so that the mechanical elasticity perpendicular to the slot crack of this alignment to be provided, and

Withdrawal force mechanism provides the withdrawal force of enhancing with the direction along mechanical elasticity.

2. fabric as claimed in claim 1, wherein this withdrawal force mechanism comprises the passage of the two-dimensional material between the passage that is arranged on three-dimensional elongated cells.

3. fabric as claimed in claim 1, wherein this withdrawal force mechanism is included in the passage of a plurality of less mesh between a plurality of bigger mesh passages.

4. fabric as claimed in claim 1, wherein this withdrawal force mechanism is the enhancement Layer that is adhered to described fabric.

5. fabric as claimed in claim 4, wherein this enhancement Layer is selected from a following cluster film: the non-woven fleece that non-woven fleece, yarn fabric, constriction non-woven fleece, slit non-woven fleece, porous non-woven fleece, perforated membrane, the perforated membrane that has elongated porosity, laminate, increment stretch, and composition thereof.

6. fabric as claimed in claim 4, wherein the bonding location with a plurality of dispersions is adhered to this fabric with this enhancement Layer.

7. fabric as claimed in claim 4 wherein is adhered to this fabric with bonding agent or elastic adhesive with this enhancement Layer.

8. fabric as claimed in claim 1, wherein this elongated mesh is a hole.

9. fabric as claimed in claim 1, wherein this withdrawal force mechanism comprises at least one bridging element, it is arranged to across at least one elongated cells.

10. fabric as claimed in claim 9, wherein this bridging element is by constituting with this fabric identical materials.

11. fabric as claimed in claim 9, wherein this bridging element is made of the material that is selected from down group: adhesive, elastic adhesive, film band, non-woven textile, and composition thereof.

12. fabric as claimed in claim 9, wherein this bridging element is arranged to the minor axis across at least one elongated cells.

13. as the fabric of claim 12, wherein this bridging element across at least one elongated cells disconnects.

14. a stretchable fabric comprises:

The fabric that inelastic materials is made; And

The pinwheel combination of the three-dimensional mesh in this inelastic materials, this combination comprise the center mesh and center on a plurality of meshes of this center mesh at least in part, to produce elasticity.

15. as the fabric of claim 14, these a plurality of meshes that wherein center on this center mesh at least in part comprise at least one pair of " C " shape mesh.

16., wherein comprise the mesh of at least two kinds of shapes at least in part around these a plurality of meshes of this center mesh as the fabric of claim 15.

17. as the fabric of claim 14, this three-dimensional mesh comprises a plurality of holes.

18. a method of making the fabric of claim 1 may further comprise the steps:

Formation has the three dimensional fabric of the elongated porosity of a plurality of alignment, so that the mechanical elasticity perpendicular to the elongated porosity of this alignment to be provided; And

For this three dimensional fabric provides withdrawal force mechanism, to increase the withdrawal force of this fabric.

19. method as claim 18, wherein provide the step of withdrawal force mechanism to comprise that the screen of the passage with at least one eyelet of utilization between at least one passage of imperforated screen forms this three dimensional fabric, to have the fabric of the passage of at least one two-dimensional material between at least one passage that is provided at three-dimensional elongated cells.

20. as the method for claim 18, wherein provide the step of withdrawal force mechanism to comprise and utilize the screen with a plurality of first eyelets between a plurality of second eyelets to form this three dimensional fabric, wherein the diameter of this first eyelet is less than the diameter of this second eyelet.

21., wherein provide the step of withdrawal force mechanism to comprise enhancement Layer be adhered to this fabric as the method for claim 18.

22. method as claim 21, wherein this enhancement Layer is selected from a following cluster film: the non-woven fleece that non-woven fleece, yarn fabric, constriction non-woven fleece, slit non-woven fleece, porous non-woven fleece, perforated membrane, the perforated membrane that has elongated porosity, laminate, increment stretch, and composition thereof.

23. as the method for claim 21, wherein the bonding location with a plurality of dispersions is adhered to this fabric with this enhancement Layer.

24., wherein this enhancement Layer is adhered to this fabric with bonding agent or elastic adhesive as the method for claim 21.

25. as the method for claim 18, wherein provide the step of withdrawal force mechanism to comprise at least one bridging element is set, it is arranged to across at least one elongated cells.

26. as the method for claim 25, wherein this bridging element is by constituting with this fabric identical materials.

27. as the method for claim 25, wherein this bridging element is made of the material that is selected from down group: bonding agent, elastic adhesive, film band, non-woven textile, and composition thereof.

28. as the method for claim 25, wherein this bridging element is arranged to the minor axis across at least one elongated cells.

29. as the method for claim 28, wherein this bridging element across at least one elongated cells disconnects.

30. a laminate, the extra play that it comprises fabric as claimed in claim 1 and is laminated to this fabric.

31. the clothes with absorbability, it comprises fabric as claimed in claim 1.

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