CN107429457A

CN107429457A - The application of technical fabric, the method for manufacturing nonwoven cloth and technical fabric

Info

Publication number: CN107429457A
Application number: CN201680013868.2A
Authority: CN
Inventors: D.库卡尔特; P.德比泽; J-L.蒙内里
Original assignee: ASTON JOHNSON Ltd
Current assignee: ASTON JOHNSON Ltd
Priority date: 2015-02-02
Filing date: 2016-02-01
Publication date: 2017-12-01
Also published as: WO2016124519A1; DE102015101449A1; CA2975650A1; US20170356104A1; EP3277870A1

Abstract

The present invention relates to a kind of technical fabric (30,40,45),Particularly for conveying non-woven fabrics web in the manufacturing process of non-woven fabrics web,It has the product side (PS) contacted with nonwoven cloth and the machine side (MS) contacted with the conveying device of the equipment (1) for manufacturing nonwoven cloth,Wherein,The fabric (30,40,45) have what is be interweaved,The MD yarns (32 extended along the traffic direction of non-woven fabrics web,33,43,44,48,50) and perpendicular extension CMD yarn (31,41,42,52),Wherein,MD yarns (32 be present,33,43,44,48,50) at least two layers,They stackably arrange up and down in couples and form product MD yarns (32,43,And non-product MD yarns (33 50),44,48),Wherein,At least each product MD yarns (32,43,50) the material towards product side (PS) has the first contact angle measured according to Wilhelmy flat band methods,First contact angle is at least 80 °,Preferably at least 90 °,Further preferably at least 100 °.In order to avoid fiber is in fabric (30,40,45) sticking on and gas permeability, which reduce, suggests,Fabric has only one CMD yarn (31,41,42,52) layer,And product MD yarns (32,43,50) respective cross section has at least two regions,Wherein first area is made up of the first material,And second area is made up of the second material,Wherein,Corresponding product MD yarns (32 can be acted on by second area transmission,43,50) pulling force on it is main,Preferably most of share,And product MD yarns (32,43,50) cross section has the first area in the second area of core (61) form and crust (62) form in parcel core (61),Wherein,Product MD yarns (32,43,50) preferably common extrusion or by two priorities sequentially the step of extrude,And MD yarns (32,33,43,44,48,50) there is leveling,It is preferred that the cross section of rectangle,Wherein,The height of cross section and the ratio of the width of cross section are preferably 1：1.2 to 1：Between 10, preferably 1：1.5 to 1：Between 4.In addition, the invention also discloses for manufacturing the method for nonwoven cloth and the application of technical fabric (30,40,45).

Description

The application of technical fabric, the method for manufacturing nonwoven cloth and technical fabric

Technical field

The present invention relates to a kind of technical fabric, particularly for conveying nonwoven cloth in the manufacturing process of non-woven fabrics web Width, the technical fabric has forms the product side contacted and the conveying with the machine for manufacturing nonwoven cloth with nonwoven cloth Device forms the machine side of contact, wherein, the fabric has MD yarns that the traffic direction along non-woven fabrics web extends and vertical In the CMD yarn of MD yarns extension, the MD yarns and CMD yarn are interweaved, and also have at least two layers of MD yarns, the MD yarns Stackably arrange up and down in couples and form product MD yarns and non-product MD yarns, wherein, the direction of at least each product MD yarns The surface of product side has a material, the material have according to the measurement of Wilhelmy flat band methods be at least 80 °, preferably at least 90 ° of contact angle.

In addition, the present invention relates to a kind of method for manufacturing nonwoven cloth, the nonwoven cloth is especially in air force The form of form, chemistry and/or the nonwoven cloth of calorifics solidification is learned, wherein, non-woven fabrics web is placed on the surface of conveyer belt Above and by latter movement.Moreover, it relates to the application of the technical fabric of the above-mentioned type.

In above-mentioned technical fabric, the contact angle of material is the Free Surface for weighing the relevant surfaces of MD yarns Energy is measured.In the measuring method that given form is " Wilhelmy flat band methods ", connecing between liquid and solid is determined Feeler.The power vertically acted on the plate (detection body) being inserted perpendicularly into is measured herein.Plate is generally fixed on so-called On the force snesor of power meter.Contact angle is not only relevant with the surface free energy of material to be measured on this point herein, and It is also relevant with the surface tension of used liquid.The above-mentioned numerical value of contact angle be herein relative to the distilled water as liquid and Speech.In the case, contact angle is 0 ° it is meant that material (disseminating) described in liquid complete wetting.In contact angle at 0 ° to 90 ° Between when illustrate that the material of plate is wettable, illustrates that the material of plate is non-wettable when contact angle is more than 90 °.So-called Super hydrophobic material (applying so-called lotus effect mostly) in, the contact angle is close to 180 ° of theoretical boundary.Contact Angle is about 75 ° in pure PET, is about 90 ° in pure PPS, and PVDF then has about 105 ° of contact angle.

Prior art

Nonwoven cloth is woven flat structure, the flat structure by finite length fiber or continuous fiber (long filament) or The totally different chopped strands of type are made, and method is mutual into fibrous layer, and in any way by fiber, long filament or yarn combination Firmly connection.Nonwoven cloth is more and more important in recent years especially made of chemical fibre, and for example applies and produced in health Product (such as baby paper diaper etc.), medical product, moistening cleaning tissue or as domestic fabric and clothes, and even it is applied to a large amount of skills Art applies (building, filtering, vehicle manufacture, electronic technology, packaging, agricultural etc.).Therefore nonwoven can be accomplished by the following way The manufacture of cloth, i.e. non-woven fabrics is formed on ventilative bottom (air force adhesive-bonded fabric by air stream made of fiber Form).Adhesive-bonded fabric solidification for example can be completed chemically by forming material engagement.It can use herein for example in poly- The additive of compound dispersant (such as including latex) form, and/or calorifics curing is used, wherein being connect again by material Fiber composite is realized in conjunction, and it is for example realized by thermoplastic fibre.So, non-woven fabrics can have what is be made up of two kinds of components Fiber, wherein, the first composition (such as polyester) of higher melt forms fibre core, and the fibre core by melting at a lower temperature Second composition (polyethylene) parcel.The formation of fiber composite in the drying device of boiler or heating then by making polymer Dispersant is hardened and/or the melting of the crust of bicomponent fibre is realized.

During running by production equipment, the web of the nonwoven cloth formed is by conveyer belt (conveying The surface of band forms with the web and contacted) it is directed through a variety of processing units.Using big in the different sections of production equipment Conveyer belt is measured, the conveyer belt is successively sequentially arranged along traffic direction.

Set what the nonwoven cloth for being formed using aerodynamics adhesive-bonded fabric and chemistry and/or calorifics solidify was manufactured In standby, usually using the technical fabric formed by one-ply yarn as conveyer belt, such as by patent document US 2010/0291824 Known to A1.In order to avoid fine in nonwoven cloth manufacturing process, especially during the non-woven fabrics web that heating is being formed Dimension sticks the table on the surface contacted with non-woven fabrics web that conveyer belt on the conveyor belt, is suggested in above-mentioned U.S. Patent application Surface roughness, the roughness should be 5 μm to 100 μm between.Thus should reduce fiber or other pollutants be attached on it is defeated The tendency on the yarn of band is sent, and is simplified when being transferred to next conveyer belt or when by other conveyings of equipment The nonwoven cloth of solidification is peeled off from conveyer belt.

But although the micro-structural with above-mentioned yarn surface, but excessive stick in known conveyer belt still be present It is inclined to pollution.Therefore with the increase of usage time, it is known that technical fabric some lost its gas permeability so that pass through The volume flow of conveyer belt and the adhesive-bonded fabric formed are reduced in a manner of not allowing.This further causes to form non-woven fabrics The deficiency heating of the fiber of web, so that the melting of bicomponent fibre and/or with the poly- of connection adhesive properties in other words The crosslinking deficiency of compound dispersant.Thus the fiber for ultimately resulting in nonwoven cloth mutually deficiently combines, so that final production The intensity of product is unsatisfactory.This is for the operator of nonwoven cloth manufacturing equipment it is meant that when gas permeability is less than determination Limiting value when, it is necessary to change conveyer belt.Cost caused by the replacing of conveyer belt, which is not only in that, must buy new conveyer belt, But also because in conveyer belt Renewal process manufacturing equipment shutdown.

In addition as described in the A1 of patent document US 2014/0127959, higher than the higher surface free energy of above-mentioned numerical value (by corresponding material select realize) also can effectively avoid fiber or other pollutants be attached on when nonwoven cloth manufactures by According to made of the fabric of the present invention on manufacturing equipment conveyer belt.Conveyer belt uses the longevity made of the fabric according to the present invention Life can be rised appreciably by this way, and manufacturing cost can be reduced accordingly.

In the case it is of special importance that known fabric has two independent tissue layers, the MD yarns of the tissue layer Arrange with being stacked with.Thus, the product MD yarns in two layers at the middle and upper levels can pass through the effect of above-mentioned reduction adhesion propensity It is optimised, and the non-product MD yarns in lower floor are then based on different requirements namely for accepting along needed for MD yarns direction The higher-strength of tension is optimised.Adhesion propensity effect is for non-product MD yarns and unobvious, because non-product MD yarns Do not formed and contacted with non-woven fabrics web to be formed and the fiber used for this.In addition, non-product MD yarns can also have especially High wear-resisting intensity, to be showed during continuous running in a device due to the contact with transfer (roller) excessively Wear phenomenon.Obviously, all MD yarns and CMD yarn must have enough high-temperature capabilitys, so as to be subjected to heating furnace Or 200 DEG C of temperature is up in drying device, wherein, even if at said temperatures it must also be ensured that required engineering properties.

But it is the high cost and larger of its manufacture the drawbacks of two-layer fabric as known to the A1 of US 2014/0127959 Fabric thickness.In addition, larger by the Roughness with reference to caused by, and correspondingly with nonwoven cloth to be conveyed Assuming that the contact area of smooth web is smaller.

The A1 of patent document WO 2009/030033 disclose a kind of fabric, and the fabric is as conveyor application in nonwoven In cloth manufacture, wherein, the web frame of the known fabrics is without the MD yarns stacked.In addition, the known fabric construction has Multiple CMD yarn layers.Known fabric (can also be embodied as fabric of twisting together) is characterized mainly in that, exposed to the product of fabric The intentional larger surface roughness of yarn on side is in the scope between 5 μm to 100 μm.Thus should be on the one hand as defeated The pollution of technical fabric is reduced during sending with use, while simplifying the adhesive-bonded fabric width being formed on conveyer belt Peel off.

The B2 of patent document US 7,121,306 disclose a kind of technical fabrics, and it has the MD yarns being in stacked arrangement. Some illustrated embodiments disclose the fabric with unique CMD yarn layer.Known fabric should be especially as paper machine clothing Or used as filtration fabrics.Such fabric, the mutually opposing fabric face of the fabric should be provided for the application Can be different, especially with different physical properties.In addition, used seam should be stayed with less on paper web Under the undesirable marking tendency, but however should also have higher intensity.Fiber is according to US 7,121,306 Problem of sticking on fabric described in B2 is not mentioned in the patent document.

A kind of long filament finally it is known that by the A1 of US 2003/0175514, be made from it yarn, made of both Woven flat structure and affiliated manufacture method.Known long filament has bicomponent structural, and it carries strong by possessing Gao Naila Core filament made of the material of degree and possesses contact angle more than 90 ° and generally by halogenation carbohydrate, such as PTFE The long filament crust of manufactured material.The known long filament and the yarn or fabric that are made from it should be hydrophobic, therefore by Woven flat structure made of it is fluid-tight.On the contrary, woven flat fabric is ventilative, that is to say, that water vapour and Other gas permeables.Preferably, it is known that long filament should be used as that it is woven to stack fiber be yarn, and subsequently become and be used for Clothes, tent or the fabric of spot camping.For technical fabrics fiber application as the special combination type of fabric by compared with Few regulation.

Technical problem

The technical problems to be solved by the invention are, there is provided a kind of technical fabric, the technical fabric is as conveying Band is in the equipment for manufacturing nonwoven cloth in use, further there is fiber to be sticked in the processing step that adhesive-bonded fabric solidifies Attached extremely low tendency, and thus there is the long life, but be also good at herein thick in relatively low fabric thickness, less surface Rugosity and the manufacturing cost reduced.

The content of the invention

Based on the technical fabric for starting the type herein, the technical problem so solves according to of the invention, i.e. described Fabric has only one CMD yarn layer, and each cross section of product MD yarns has at least two regions, wherein first area It is made up of the first material, and second area is made up of the second material, wherein, it can be acted on by second area transmission each Main, the preferably most of share of pulling force on product MD yarns, and the cross section of product MD yarns have in core form the Two regions and the first area in the crust form for wrapping up core, wherein, product MD yarns are preferably simultaneously co-extruded or by two elder generations Afterwards successively the step of, extrudes, and MD yarns have leveling, preferred rectangle cross section, wherein, the height of cross section with it is transversal The ratio of the width in face is preferably 1：1.2 to 1：Between 10, preferably 1：1.5 and 1：Between 4.

Fabric construction according to the present invention is completely special, because while the MD yarn layers stacked be present, but is only had Unique CMD layers, that is to say, that the fabric refers to the woven (plain weave) of classics.The thickness of this fabric is with having multilayer The fabric of CMD yarn reduces compared to obvious, thus form the possibility of for example higher flexibility and the more minor radius for realizing slewing rollers Property.It is in addition, different from the known fabrics with multi-layer C MD yarns, hence it is evident that material input to be reduced, so as to inexpensively make Make the fabric according to the present invention.For this it is further advantageous that according to the present invention be not present it is multiple be independent of each other it is i.e. independent, necessary The tissue layer being be combined with each other by connection-CMD yarn.Although implementing with minimizing in the quantitative aspects of its CMD yarn layer, but it is based on Two MD yarn layers being stacked with can also easily distinguish open the textile properties between product side and machine side.Enable in particular to Very simple mode will stick property and required by machine side in the anti-of pollution tendency that be used to reduce required by product side Intensity and durability be combined.

In addition, each cross section of product MD yarns has at least two regions, wherein first area is made up of the first material, And second area is made up of the second material, wherein, the drawing that can be acted on by second area transmission on each product MD yarns Main, the preferably most of share of power.

Due to the limited amount (as it is required in the case) of the material with high surface energy, and related material Material is relative high price mostly, so the use of special " the anti-pasting material " should be only limitted to realize the journey needed for desired effects Degree.Therefore possibility as existing, it can be in product MD yarns or its surface towards product side in basic material (second Material) on formed " coating ".Product MD yarns can not be by such second material (base by the cross section needed for anti-pasting material Plinth material) form, second material has good engineering properties and however relatively low price.The coating herein may be used Only to occupy the smaller share of the total cross-section of yarn (being less than 20%).

According to the present invention product MD yarns " coating " can by way of so-called wet type coating or alternatively by The mode of plasma-coated (under vacuum or atmospheric conditions) is completed, however in principle can also by it is all other it is contemplated that Coating process is completed.Coating material is connected on basic material by way of sticking in wet type coating, and in plasma The stronger cohesion formula connection compared with sticking during coating be present.

The bicomponent structural according to the present invention of product MD yarns is, the cross sections of product MD yarns has the in core form Two regions and the first area in the crust form for wrapping up core, wherein, this preferably common extrusion molding of product MD yarns, Huo Zhetong The mode (first stage=core, second stage=crust) for crossing two-stage extrusion molding is made.It is this common as the alternative of " coating " With extrusion or the two-stage extrusion yarn have 0.02mm between 0.07mm, preferably 0.03m to the scope between 0.06mm Interior skin thickness.By that can be selected without any problems enough to big material thickness when common extrusion or two-stage are extruded Avoid the anti-pasting material in the two first areas over time by mechanical wear so as to cause according to the present invention knitting The anti-risk for sticking loss of properties of thing.

Either the cross section of the cross section of part MD yarns and/or CMD yarn or part CMD yarn is leveled, especially MD yarns Rectangle, especially smooth rectangle.In the cross section of rectangle it is contemplated that 1:1.2 to 1:(height between 10：It is wide Degree), preferably 1:1.5 to 1:Depth-width ratio between 14.

Preferably, MD yarns or part MD yarns and/or CMD yarn or part CMD yarn are designed as monofilament.CMD yarn or part CMD yarn Cross section can be circle, oval or oval or polygonal shapes and/or leveling, especially rectangle.

Preferably, first area namely anti-pasting material are by fluoropolymer, such as PVDF, ETFE or PTFE or poly- second The copolymer that alkene is formed together with above-mentioned fluoropolymer is formed, and second area namely core material are by polyester, polyamide, poly- Diphenyl sulfide, polyether-ether-ketone, polypropylene, aramid fiber, poly- second acetone (Polyethaceton) or PEN structure Into.

When the CMD yarn that at least can be contacted with non-woven fabrics web formation to be formed or fiber can be accepted at this At least towards product side surface material have according to Wilhelmy flat band methods measurement be more than 80 °, preferably greater than 90 °, enter When one step is preferably greater than 100 ° of contact angle, forming adhesion propensity of the fiber of nonwoven cloth on the fabric according to the present invention can Further to reduce.The connection being especially also made up of in the very important part of the contact surface with non-woven fabrics web CMD yarn In type, it is very favourable that it, which resists and sticks property,.

CMD yarn preferably has circular cross section, and which improve weavability.MD yarns are generally in the fabric according to the present invention Weaving technology production in be warp thread, and CMD yarn is the weft yarn of fabric.

In order to realize larger contact surface, the large contact especially on the product side of fabric, can replace respectively Ground is successively sequentially arranged the CMD yarn with larger-diameter CMD yarn and with small diameter, wherein, the CMD with small diameter Yarn and MD yarns connect and preferably at least on the surface opposed with product side by with more than 80 °, preferably greater than 90 °, enter one The material for the contact angle that preferably greater than 100 ° of step is formed.

In addition, part MD yarns and/or part CMD yarn can be conductive.This can especially be achieved in, i.e. in correlation The carbon for forming conductive layer in the external jacket of the cross section of yarn be present.The carbon-coating can for example by common coating process, It is made particular by plasma-coated.As fabric at least conductively designs in the form of scattered single thread (such as every five or every eight Individual MD yarns or CMD yarn conductively design) when, electric field can be formed being designed as surrounding around the technical fabric of band, it is possible thereby to Further reduce fiber sticking during nonwoven cloth is manufactured.Imported by transfer (roller) to be formed needed for electric field Voltage, the transfer be typically metal and machine side with fabric formed and contacted.

When the seam for making two fabric terminations connected is closed into continuous conveyer belt, especially loading for continuous band is formed Seam, wherein, the seam is helically-seamed, and described helically-seamed there are two to extend on the whole width of conveyer belt Seam spiral, in the kink for the MD yarns that the seam spiral screws in respectively or crocheted enters fabric termination mutually opposing respectively, and And two fabric terminations mutually couple by the closed line extended on the whole width of conveyer belt.

When seam spiral has at least two regions by its cross section respectively, (namely one of them is in core form and another It is individual in parcel core crust form) yarn form when, the protrusion of the product side of the fabric in itself it is anti-stick property there is also In in helically-seamed region, wherein, crust by with according to Wilhelmy flat band methods measure be at least 80 °, preferably at least 90 ° of contact angle, the material for the contact angle for being further preferably at least 100 ° form.

Above-mentioned technical problem solves according to the present invention also by the method for manufacturing nonwoven cloth, and the nonwoven cloth is outstanding It is the nonwoven cloth that aerodynamics is formed and chemistry and/or calorifics solidify, wherein, non-woven fabrics web is in manufacturing equipment Moved on the surface of conveyer belt, wherein, according to the present invention, conveyer belt is by according to any one of the claims in the present invention 1 to 10 institute The technical fabric stated is formed.

Finally, the technical problems to be solved by the invention also pass through work according to any one of claim 1 to 10 Industry fabric application solve, using the technical fabric as it is used for conveyer belt in non-woven fabrics web manufacturing process, especially at it It is aerodynamic formation and in heating furnace or heater calorifics and/or chemically solidify when convey non-woven fabrics web.

Embodiment

Multiple embodiments of a kind of embodiment and technical fabric below according to the equipment manufactured for nonwoven cloth are detailed It is thin to illustrate the present invention, it can be manufactured for using the conveyer belt in manufacturing equipment by the technical fabric.

In the accompanying drawings：

Fig. 1 shows the schematic diagram of the manufacturing step for nonwoven cloth,

Fig. 2 shows the sectional side elevation of technical fabric in the first embodiment,

Fig. 3 shows the sectional side elevation of technical fabric in this second embodiment,

Fig. 4 shows the cross section that cutting obtains according to Fig. 4 fabric in the first CMD yarn region,

Fig. 5 is shown similar to Fig. 5 but the cross section in the second CMD yarn region,

Fig. 6 shows the cross section that cutting MD yarns obtain,

Fig. 7 shows the vertical section that cutting obtains according to the technical fabric of the 4th embodiment in seam kink area,

Fig. 8 shows the partial top view of two terminations of technical fabric when seam closes, and

Fig. 9 is shown in helically-seamed region according to the stereogram of the fabric according to the present invention of the 5th embodiment.

Equipment 1 shown in Fig. 1 is used to manufacture the nonwoven cloth that aerodynamics is formed and both thermally and chemically solidified, described Nonwoven cloth leaves equipment 1 as continuous web at position 2.Nonwoven cloth by be mixed with bicomponent fibre fibre stuff and The plastic grain of strong water absorption function is formed.Bicomponent fibers have made of possessing the polypropylene of higher melt core and by possess compared with The crust of parcel core made of the polyethylene of low melting point.Raw material is launched on shaping band 4 by charging gear 3, is taken in shaping Constituent material layer.By conveyer belt, non-woven fabrics web is transferred to injection apparatus 6 by conveyer belt 5 in other words, complete on injection apparatus Into the coating with the adhesive polymeric dispersant of connector property in other words.Non-woven fabrics web is when through injection apparatus 6 Conveyed by band 7.

Non-woven fabrics web is delivered to the first drying device 8 (heating furnace) after injection apparatus 6, in the first drying device In by conveyer belt 9 convey web.In drying device 8, the sheath melts of two component fibres and sprayed in injection apparatus 6 Polymeric dispersant hardening.The fiber of nonwoven cloth is set to engage firmly by this way.

Non-woven fabrics web is directed through the second injection apparatus 11, subsequent nothing by band 10 after the first drying device 8 Spinning cloth web, conveyer belt 12 is directed through the second drying device 13 in other words by the second conveyer belt.Completed in curing system 14 The final hardening of non-woven fabrics web, the conveying of non-woven fabrics web is completed by the 3rd conveyer belt 15 in the curing system.Finally, Manufacture the outlet (position 2) that the non-woven fabrics web completed is directed to equipment by discharging band 16.

The problem of known device, is that the space in conveyer belt 9,12 is blocked by the fiber of unbundling, so that conveyer belt 9th, 12 permeability declines, and the air in drying device 8,13 is passed through non-woven fabrics web again.Thus to The heat transfer deficiency of non-woven fabrics web, so as to cause insufficient engagement of fiber, and and then cause the deficiency of non-woven fabrics web Intensity because can no longer reach required temperature.The drawback is according to the present invention by also with following shown in Fig. 2 to 8 The fabric of detailed description overcomes.

Sectional side elevation, namely the yarn cutting industry parallel to the traffic direction extension along non-woven fabrics web is shown respectively in Fig. 2 and 3 The section that fabric 30,40 obtains.

Fig. 2 shows the MD yarns 32 for only having the fabric 30 of 31 layers of a CMD yarn but having two to be in stacked arrangement again With 33.MD yarns have identical trend in fabric；Referred to herein as so-called two-wire double yarns in other wordsBut MD yarns 32,33 maintain its mutual orientation all the time, that is to say, that not mutual or twist together each other. Thus the MD yarns 32 being arranged on the product side PS of fabric 30 are in the top for the MD yarns 33 being arranged on machine side MS all the time.With The MD yarns 32 and 33 that stacked arrangement mode extends directly are contacted using the surface region of its mutual direction.As being also described in detail later , MD yarns 32,33 have the rectangular cross section of leveling, therefore stable stacking and maintenance can be realized in composite fabric Mutual arrangement.

Technical fabric 40 shown in Fig. 3 includes the CMD yarn 41 and 42 being arranged in unique CMD layers.In addition, in fabric 40 In two MD yarns 43 and 44 layers also be present, wherein, MD yarns 44 are arranged on machine side MS, and MD yarns 43 are arranged in product side PS On.Especially as shown in the viewgraph of cross-section according to Fig. 4 and Fig. 5, the CMD yarn 42 with small diameter is connection yarn (reference picture 5), And it is referred to as pure filling yarn weft yarn in other words with larger-diameter CMD yarn 41And in contrast straight line Ground extends through fabric 40 (reference picture 4).As illustrated, the MD yarns 43,44 of corresponding pairs are mutually separated (reference by CMD yarn 41 Fig. 4), and 43,44, MD yarns directly mutually reclined in the region of CMD yarn 42, that is each other formed planar contact.Knitting In the case of thing 40, MD yarns 43,44 are warp thread, and CMD yarn 41,42 is weft yarn.

Fig. 6 shows the cross section that the single MD yarns of cutting obtain, and the cross section can be respectively disposed on production in fabric 30,40 On product side (MD yarns 32,43).The rectangle MD yarns of leveling have core 61 (yarn core) and wrap up the crust 62 (yarn crust) of the core.Core 61 Outside shape exterior feature be rectangle and with 0.36mm height 63 and 1.07mm width 64.Crust 62 is same in its outline Sample is rectangle and height 65 and 1.20mm width 66 with 0.45mm.It follows that crust 62 is in its long side Thickness 67 is about 0.045mm.It is made up of outside with 62 the material with extra high surface energy, such as PVDF.On the contrary, core 61 is by having There are the material of good mechanical properties (possessing extra high tensile strength), such as polyester (PET) to form.The either material of core 61 Or the material of crust 62 both provides up at least 200 DEG C of sufficiently large high-temperature capability.

Fig. 7 schematically shows the construction of the seam on fabric 45 with sectional side elevation, and what fabric also must be as described above knits Thing 30,40 is equally bonded into continuous strip, so as to as conveyer belt 9,12,15 using in the device 1.In connecing for fabric 45 To stitch and seam kink 47 is constructed on termination 46, thus the seam kink is formed, i.e. the MD yarns 48 of bottom are cut off on position 49, and And remove the remaining section towards seam termination 46.Corresponding heap overlay is imported in the passage being made up of before MD yarns 48 Top MD yarns 50 (product MD yarns), and the termination 51 of top MD yarns is utilized in the position that bottom MD yarns 48 (non-product MD yarns) terminate Put and led back on 49.Seam kink 47 is formed by MD yarns 48 on seam termination 46 by this way.The CMD yarn 52 of fabric 45 is at this Keep not being touched in seam construction.

As shown in Figure 8, submitted in two mutually opposing seam terminations 46,53 of the fabric 45 for being bonded into zonula occludens Seam kink 47 is alternately formed by MD yarns 50, and adjacent MD yarns 50 keep not forming seam kink.Pass through seam kink 47 Dislocation arrangement on mutually opposing seam termination 46,53, two seam terminations 46,53 can be in the way of form fit Promote and gather relative to each other along the direction of arrow 54,55.By this way, the ranks that seam kink 47 is interweaved, which are formed, to be run through Seam passage, closed line 56 (according to type of CMD yarn) imports the passage, thus closes seam and continuous band is made.

Fig. 9 shows the stereogram of another fabric 70 according to the present invention, its have jointed alternate embodiment namely The helically form of seam.Technical fabric 70 except seam termination in itself in addition to have with according to Fig. 3 to 5 fabric identical construct, The technical fabric 70 has warp thread kink 71 on two free terminations (being observed along MD directions), and the warp thread kink is by MD yarns 72nd, 73 form, mode is to knit certain length last time of the MD yarns 72,73 on the machine side MS of fabric 70.Warp thread kink 71 Termination is on the common straight line extended perpendicular to MD yarns 72,73, to form helically-seamed 74, have spiral shape trend and Collapsed one by one through the yarn 75 of warp thread kink 71 in the warp thread kink 71.Yarn 75 has circular or leveling cross section, and And the yarn crust 77 for concentrically wrapping up the yarn core by two-component namely by yarn core 76 and in cross-section forms.Yarn 75 can be with By extruding or being made up of multistage extrusion jointly, extrusion molding is first passed through headed by mode yarn core 76 is made, and then led to The mode for crossing the second extrusion molding is surrounded with the material of yarn crust 77.The table towards product side PS of crust 77 and MD yarns 72,73 Face is the same to be made up of the material with the contact angle for being at least 80 ° according to the measurement of Wilhelmy flat band methods.The closure of seam passes through In the following manner is completed, i.e., the two of fabric 70 termination is mutually twisted using its seam spiral, so as in the seam spiral shell of two terminations 74 Inner Constitution close passages 78 are revolved, unshowned blockade line imports the close passage 78 along the longitudinal direction 79 of seam spiral 74, Thus it is connected with each other two fabric terminations.

Surface property based on yarn 75 in seam region, the yarn 75 when composition seam spiral 74 is avoided by with smaller The material of contact angle the undesirable risk sticked may occur when being made in seam region.The core 76 being present in yarn 75 is real Show by selecting the material with high-tensile, it is ensured that the required stability and tensile capacity of seam.

List of numerals

1 equipment

2 positions

3 charging gears

4 shaping bands

5 conveyer belts

6 injection apparatus

7 bands

8 drying devices

9 conveyer belts

10 bands

11 injection apparatus

12 conveyer belts

13 drying devices

14 curing systems

15 conveyer belts

16 discharging bands

30 fabrics

31 CMD yarns

32 MD yarns

33 MD yarns

40 fabrics

41 CMD yarns

42 CMD yarns

43 MD yarns

44 MD yarns

45 fabrics

46 seam terminations

47 seams are twisted together

48 MD yarns

49 positions

50 MD yarns

51 terminations

52 CMD yarns

53 seam terminations

54 arrows

55 arrows

56 closed lines

61 cores

62 crusts

63 height

64 width

65 height

66 width

67 thickness

70 fabrics

71 warp thread are twisted together

72 MD yarns

73 MD yarns

74 seam spirals

75 yarns

76 cores

77 crusts

78 close passages

PS products side

MS machine sides

Claims

A kind of 1. technical fabric (30,40,45,70), in particular for conveying non-woven fabrics in the manufacturing process of non-woven fabrics web The conveyer belt of web, the technical fabric have the product side (PS) that is contacted with nonwoven cloth and with for manufacturing nonwoven cloth The machine side (MS) of the conveying device contact of equipment (1), wherein, the fabric (30,40,45,70) has along non-woven fabrics web Traffic direction extension MD yarns (32,33,43,44,48,50,72,73) and perpendicular to MD yarns extension CMD yarn (31,41, 42nd, 52), the MD yarns and CMD yarn are interweaved, and have at least the two of MD yarns (32,33,43,44,48,50,72,73) Individual layer, they in couples stackably up and down arrange and form product MD yarns (32,43,50,72,73) and non-product MD yarns (33, 44th, 48), wherein, the surface towards product side (PS) of at least each product MD yarns (32,43,50,72,73) has the first material Material, first material have according at least 80 °, preferably at least 90 ° of Wilhelmy flat band methods measurement, further preferably at least 100 ° of contact angle, it is characterised in that fabric (30,40,45) has only one CMD yarn (31,41,42,52) layer, and produces The respective cross section of product MD yarns (32,43,50,72,73) has at least two regions, and wherein first area is by the first material structure Into, and second area is made up of the second material, wherein, can be acted on by second area transmission each product MD yarns (32, 43rd, 50) on pulling force main, preferably most of share, and the cross section of product MD yarns (32,43,50,72,73) First area with the second area in core (61) form and in crust (62) form for surrounding core (61), wherein, product MD Yarn (32,43,50,72,73) be preferably simultaneously co-extruded shaping or two priorities sequentially the step of in extrusion forming, and MD Yarn (32,33,43,44,48,50) has leveling, preferred rectangle cross section, wherein, the height of cross section and cross section The ratio of width is preferably 1：1.2 to 1：Between 10, preferably 1：1.5 to 1：Between 4.
2. technical fabric (30,40,45,70) according to claim 1, it is characterised in that gathered by fluorine-containing first area Compound, such as PVDF, ETFE or PTFE or the copolymer formed by polyethylene with the fluorine-containing polymer are formed.
3. technical fabric (30,40,45,70) according to claim 1 or 2, it is characterised in that second area is by polyamides Amine, polyphenylene sulfide, polyether-ether-ketone, polypropylene, aramid fiber, poly- second acetone or PEN are formed.
4. technical fabric (30,40,45,70) according to any one of claim 1 to 3, it is characterised in that at least can With non-woven fabrics web formed the material at least towards product side (PS) of CMD yarn (31,41,42,52) contact with according to Wilhelmy flat band methods measure at least 80 °, preferably at least 90 °, further preferably at least 100 ° of contact angle.
5. technical fabric (30,40,45,70) according to any one of claim 1 to 4, it is characterised in that CMD yarn (31,41,42,52) there is circular cross section.
6. technical fabric (30,40,45) according to claim 5, it is characterised in that there is larger-diameter CMD yarn (41) alternately successively sequentially arranged respectively with direction of the CMD yarn (42) with small diameter along MD yarns (43,44), its In, the CMD yarn (42) with small diameter is connected with MD yarns (43,44), and the direction of the CMD yarn (42) with small diameter The surface of product side by with according to Wilhelmy flat band methods measure at least 80 °, preferably at least 90 °, further preferably at least The material of 100 ° of contact angle is formed.
7. technical fabric (30,40,45,70) according to any one of claim 1 to 6, it is characterised in that MD yarns (32, 33rd, 43,44,48,50) and/or CMD (31,41,42,52) is monofilament.
8. technical fabric (30,40,45,70) according to any one of claim 1 to 7, it is characterised in that at least partly MD yarns (32,33,43,44,48,50) and/or CMD yarn (31,41,42,52) be it is conductive, especially

- there is carbon in the external jacket of the cross section of the yarn of correlation, be especially provided with carbon coating, or

- in the material of MD yarns (32,33,43,44,48,50) and/or the material of CMD yarn (31,41,42,52), preferably with equal The mode of even distribution includes CNT, preferably has at least 15 weight %, further preferred at least 20 weight % share.
9. technical fabric (30,40,45,70) according to any one of claim 1 to 8, it is characterised in that the industry Fabric is closed into continuous conveyer belt by connecting the seam of two fabric terminations, wherein, seam is helically-seamed, the spiral Seam has two seam spirals (74) extended on the whole width of conveyer belt, and the seam spiral screws in respectively or crocheted Into the kink (71) of the MD yarns (72,73) of mutually opposing fabric termination respectively, and both are by the whole of conveyer belt The closed line extended on width mutually couples.
10. technical fabric (30,40,45) according to claim 9, it is characterised in that seam spiral (74) is respectively by yarn (75) form, it is core (76) and separately that the cross section of the yarn (75), which has at least two regions, i.e. one of area format, One area format is to surround the crust (77) of core (76), wherein, crust (77) is by with according to the measurement of Wilhelmy flat band methods The material of at least 80 °, preferably at least 90 °, further preferably at least 100 ° of contact angle is formed.
11. technical fabric according to any one of claim 1 to 10, it is characterised in that yarn (31,32,33,41,42, 43rd, 44,48,50,72, cross section 73), especially MD yarns (32,33,43,44,48,50,72,73) and/or CMD yarn (31, 41st, 42, cross section 52) is at least 0.0003mm², preferably at least 0.007mm², further preferably at least 0.1mm²。
A kind of 12. nonwoven cloth for being used to manufacture that nonwoven cloth, especially aerodynamics are formed and chemistry and/or calorifics solidify Method, wherein, non-woven fabrics web is moved on the surface of conveyer belt (9,12,15), it is characterised in that conveyer belt (9,12, 15) it is made up of the technical fabric (30,40,45) according to any one of claim 1 to 11.
13. a kind of application of technical fabric (30,40,45) according to any one of claim 1 to 11, the technical fabric It is used to pass through melt processed in the manufacturing process of non-woven fabrics web, especially in non-woven fabrics web as conveyer belt (9,12,15) And consolidate in the calorifics solidification process carried out or by being hardened in drying device (8) or curing system (14) and the chemistry of progress Non-woven fabrics web is conveyed during change.