CN101331258A - Hydroentangled elastic nonwoven sheet - Google Patents

Hydroentangled elastic nonwoven sheet Download PDF

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Publication number
CN101331258A
CN101331258A CNA2006800470532A CN200680047053A CN101331258A CN 101331258 A CN101331258 A CN 101331258A CN A2006800470532 A CNA2006800470532 A CN A2006800470532A CN 200680047053 A CN200680047053 A CN 200680047053A CN 101331258 A CN101331258 A CN 101331258A
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China
Prior art keywords
fiber
fabric
precursor
elastic fabric
elastic
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CNA2006800470532A
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Chinese (zh)
Inventor
T·E·贝尼姆
D·-S·蔡
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EIDP Inc
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EI Du Pont de Nemours and Co
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C3/00—Stretching, tentering or spreading textile fabrics; Producing elasticity in textile fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
    • B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/10—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically
    • D04H3/11—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between yarns or filaments made mechanically by fluid jet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/102—Woven scrim
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/10—Scrim [e.g., open net or mesh, gauze, loose or open weave or knit, etc.]
    • Y10T442/184—Nonwoven scrim
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/601—Nonwoven fabric has an elastic quality
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/697—Containing at least two chemically different strand or fiber materials

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Multicomponent Fibers (AREA)

Abstract

A method for making an elastic fabric with the steps of providing a hydroentangled precursor fabric having at least 1 percent by weight of binder fibers, heating the precursor fabric to a temperature above the melting point of the binder fibers and then drawing the precursor fabric in the machine direction at a ratio sufficient to reduce the width by more than 20 percent and at a strain rate of 10 to 800 percent per minute to produce an elastic fabric having a cross-directional extensibility of about 100 percent up to 500 percent and a 30-95 percent recovery under a 50 percent extension.

Description

Hydroentangled elastic nonwoven sheet
Background of invention
Invention field
The present invention relates to method by non-resilient Hydroentangled sheet preparation elastic nonwoven sheet.
Description of Related Art
Elastic fabric is generally made by the rubber that is incorporated into or is attached to precursor web or some other elastomeric material.Precursor web can be traditional textile or supatex fabric.Other method of producing the elastic non-woven thing comprises embedding or elastomeric threads, bar and film is installed.They can install by adhesive, heat bonding, lamination, stitching, sewing are bonding etc.Yet in all cases, processing all is expensive.
On the other hand, people's such as people's such as Hassenboehler US 5,244,482 and Tsai EP1538250 A1 has proved, the supatex fabric of thermoplastic bonded, and for example spunbond and carded web can utilize heat and strain processing to have the fibre web of elastic performance with formation.Thereby these thermomechanical methods are described and were sent the baking oven that is in the high temperature between softening temperature and the fusing point also to stretch along the transversely strengthening fibre web along the longitudinal the heat bonding precursor web, and most of whereby fibers are elongated and mainly come into line along draw direction.After the fibre web cooling, fiber is fixed on the position memory that is created in thermal bond points in the longitudinal tensile strain rate structure; Therefore, this fibre web shows recovery when along cross directional stretch.Yet these methods require precursor web to accept hot mechanical adhesion or calendering in advance, and treatment temperature must be lower than the fusing point of fiber.Otherwise fibre web will plastify, stiff, embrittlement, in fact not have elasticity, and will be perhaps even worse, will cause the fibre web work in-process to break.Moreover the TENSILE STRENGTH of Given this planting fibre web relies on heat bonding fully, and heat and strained handling mainly come into line most of fibers along draw direction, so it causes the elastic fabric made to be badly damaged along the tearing strength of draw direction.
For many purposes, require to have soft fabric, and can obtain by using entangled fabric than high-tear strength.Yet traditional spunlaced and needle punched fabric can not obtain elasticity by heat described in the prior and strain process, because " bounding point " forms by tangling, it only provides and impermanent friction and the interlocking contact point that is changed by this method.
Summary of the invention
The present invention relates to by providing a kind of Hydroentangled precursor web to make the method for elastic fabric, this precursor web has 1wt% thermoplastic binder fiber at least, and it has the melt temperature that is lower than all the other base fibers; And when precursor web is heated above the temperature of adhesive fiber fusing point, longitudinally, subsequently the gained fibre web is cooled to environment temperature so that make the typing of gained fibre web with the strain rate stretching precursor web of ratio and at least 10～800% per minute of being enough to reduce precursor fabric width at least 20%.
The present invention relates to a kind of by described method manufacturing and have 100%～500% along the horizontal response rate in edge of extending transversely rate and 30～95% under 50% percentage elongation.
The accompanying drawing summary
Accompanying drawing is the schematic diagram of equipment of implementing a kind of embodiment of the inventive method.
Detailed Description Of The Invention
A purpose of the inventive method provides the good manufacturing elastic spunlaced fabric of a kind of cost benefit and does not use true elastomeric fibre as the thermomechanical method of base fiber. By in the inelastic body precursor web, mixing low percentile low melting point adhesive fiber, through or without heat bonding, and carry out stretch process in the temperature that is higher than the adhesive fiber fusing point, this plasticized binder fibers can play bonding effect and produces fiber around the fixing position memory of contact point at contact point. In view of the percentage of adhesive fiber very low, so that high temperature process of the present invention does not cause is any significantly stiff.
Use spunlaced nonwoven precursor that thicker, the softer elastic fabric with better tearing strength is provided. This precursor web is mainly by inelastic body base fiber such as PETG (being polyester), or the mixture of polyamide short fibre or above synthetic fibers and certain percentile non-thermoplastic fiber such as wooden oar, cotton, artificial silk, day silk (Lyocell) etc., subsequently with at least about 1% adhesive fiber, preferred about 5%～30% adhesive fiber blending and making. Adhesive fiber is preferably made by thermoplastic fibre such as polypropylene, polyethylene, copolyesters, acrylic compounds, polyamide, polyurethane and polystyrene. Adhesive can be bicomponent fibre, such as skin/core, arranged side by side etc. For example, adhesive fiber can be two-component staple fiber, has copolyesters skin and polyester core or polyethylene sheath and polyester or composite elastic body core. The composition of copolyesters can change with the manufacturer of fiber and the attribute of requirement, and still general copolymer by PETG and ethylene isophthalate forms. The percentage of adhesive fiber is for fabric weight. Also further be processed into spunlaced fibre web by mixing adhesive fiber in fibre web, activate subsequently these adhesive fibers in the online dry machine, we have made the fabric that can be converted into subsequently elastic web. Between the adhesive fiber itself and/or and base fiber between the crosspoint play the bonding effect of the point that is similar to nonwoven fabric.
The invention provides a kind of method for preparing elastic spunlaced (Hydroentangled), nonwoven web.The precursor web of synthetic and/or wood pulp fiber and thermoplastic binder fiber blending is by shredding, combing or other suitable fibre web manufacturing process, carries out Hydroentangled (also being called spunlaced) subsequently and is processed to fibre web.Spunlaced fibre web stands to be enough to melt adhesive fiber at least in part but the high-temperature process that still is not enough to melt the base fiber that constitutes fabric.This can finish by hot air treatment or any measure that other is fit to reach desired high temperature.When standing to be higher than the temperature action of adhesive fiber fusing point, spunlaced fabric is accepted stretch processing longitudinally, and its draw ratio is enough to make the fibre web fabric width to reduce more than 20% (preferred 55～75%), and wherein strain rate is between 10～800%/min.This draw ratio can be 5～50%, preferred 10～20%.This drawing by high temperature step or can finish or can be used as independent off-line procedure of processing online with the precursor web forming process and carry out.The method of heating precursor web is not particularly limited, and can finish in the necessary short time avoiding damaging fibre web as long as conduct heat.Heating can be finished by radiation or convection current.Radiation heating can adopt infrared method to implement.Convective Heating can be by the suitable hot fluid that adds, and preferred gas such as air are implemented.
The inventive method can further describe with reference to the accompanying drawings.Correspondingly, elastic spunlaced fabric 2 is prepared as follows: the spunlaced precursor web 1 that comprises thermoplastic binder fiber is provided, and precursor web is by withdrawal roller 10 carryings thus.Withdrawal roller 10 is around its longitudinal axis rotation, and precursor web 1 is left withdrawal roller 10 with speed A along arrow indication vertical (MD) thus.Precursor web enters into heater 20 through S shape coiling (wrap) 15, passes heater, comes out to arrive take up roll 30 through S shape coiling 25 from heater.Coiling 25 of S shape and take up roll 30 are driven with withdrawal speed A height (1+X%) speed doubly than withdrawal roller 10 and S shape coiling 15.S shape coiling 15 comprises roller 151 and 152.S shape coiling 25 comprises roller 251 and 252.Multiple (1+X%) decision precursor web draw ratio in the methods of the invention.According to the present invention, precursor web stands longitudinally to be enough to make fabric width to be reduced by at least 20% the draw ratio and the stretch processing of the strain rate in 50～800%/min scope, temperature is higher than the fusing point of adhesive fiber therebetween, so as to produce a kind of along the transverse breakage percentage elongation greater than about 100% to the highest 500% finished product fabric.Adopt the gained elastic fabric can obtain 15～80% commercial useful response rate and 50～200% rate elongation.Preferably, the equipment of implementing the inventive method is constructed to have industrial capacity, and its withdrawal roller and take up roll are mounted to the 3～40m of being separated by, the distance of preferred about 20～30m, and be provided with heater between the two.Withdrawal roller is advantageously with greater than 30m/min and the highest 300m/min, preferred 100m/min at least, and the industrial speed running of the highest 250m/min, and 1%～30%, preferred 10～20% draw ratio reaches by improving take up roll speed.Strain rate is adjusted between 10～800%/min.The degree that draw ratio and precursor web fabric width reduce is relevant, and strain rate is then relevant with the processing speed under the fixing draw ratio condition.It is found that when speed was lower than claimed range, fibre web was tending towards overheated and becomes stiff.On the other hand, if speed is higher than the scope of requirement, precursor web underheat then, so or fibre web may during stretch processing, rupture, perhaps fabric width reduces and can not keep after the released of fibre web.The motion of nonwoven web is also controlled in S shape coiling 15 and 25, simultaneously as the drawing-off means.
This elastic spunlaced fibre web is characterised in that, compares 20～75% fabric width minimizing and about 100%～500% extending transversely rate with precursor web.Reduce desired draw ratio and depend on the precursor web structure to a great extent for reaching specific fabric width.Acquisition greater than 20% fabric width reduce for reach the cross direction elongation of making fabric greater than 100% and and then make fabric possess flexible may be all very important.In addition, the transverse elasticity of elastic spunlaced fibre web is characterised in that: the response rate under 50% percentage elongation is between 30～95%, or the response rate under 100% percentage elongation is between 25～75%, or the response rate under 150% percentage elongation is between 15～75%.The elastic spunlaced fabric of making has the thickness of 0.2mm～3.5mm, 20～300g/m 2Basic weight.
The present invention also provides the product that comprises elastic nonwoven web of the present invention, and it has been expanded greatly and can be used for the scope of producing the nonwoven substrates of elastic nonwovens in extraordinary cost-benefit mode.The present invention can be applicable to such as consumer lines; The toilet; Medical mask, cap and gloves; Composite and laminated material and coating base material for example are used for the field of the base material of synthetic leather.
Term and test method:
Strain rate (%/t) generally is described as be in a period of time a slice fabric and is stretched and prolongs a certain (X) percentage.This prolongation percentage can be tried to achieve with the ratio of the speed of withdrawal roller or S shape coiling (25) by take up roll or S shape coiling (25), and the time that fabric passes through can calculate divided by the mean value of withdrawal speed (A) and winding speed [(1+X%) A] by D.Speed A generally is that unit representation is as follows with m/min:
X％/{D/[A+(1+X％)A]/2}＝X％/{2D/[A+(1+X％)A]}＝{X％×[A+(1+X％)A]}/2D
Fibre web elasticity by measure along the 5cm of the longitudinal axis wide * the long galley proof of 10cm, press following formula and define:
(length after the length-answer after the elongation)/(length after the elongation-former length).
Fusing point is the temperature of thermoplastic fibre when beginning to become liquid.
Strip tensile test is measuring of fracture strength when fabric stands unidirectional stress and percentage elongation or strain.This test is at the strain-gauge test machine, carries out under the constant speed mode of Instron 1122 types.In current embodiment, along 2 inches (50mm) wide and at least 5 inches (150mm) long fabric galley proofs of vertical and horizontal cutting of fabric.10 samples of every kind of sample determination are with calculating mean value.This test is well known in the art and roughly meets the regulation of ASTM method 5035-95.The result is to represent until the poundage of fracture and the percentage elongation percentage before the fracture.Term " percentage elongation " is meant the increase of sample length during the tension test, represents with the percentage of former length.The elongation at break of measuring in used term " rate elongation " and the tension test is identical.
Tearing strength is tongue (simple check mouth) program of revising by by ASTM 5735, adopts 2 * 2.5 inches (the rectangular specimen mensuration of 50mm * 63.5mm).Handle 10 samples of test for every kind, the result represents with poundage.
The basic weight of per sample (p.s.) is grabbed all product by 10 galley proofs or 12 respectively and is averaged weight and calculates.
Thickness is respectively 10 galley proofs or 12 mean values of grabbing all product.Galley proof is to adopt TMI automatic thickness analyzer to measure, and wherein the contact area diameter is 2 inches, and pressure is 14.7g/cm 2Grabbing all product is to adopt the Ames finger gauge to measure, and wherein the contact area diameter is 1 inch, and pressure is 7.46g/cm 2
Embodiment
In the following embodiments, base fiber is a polyester staple fiber, is supplied with trade name Dacron (R) 612W type by DAK Americas.Adhesive fiber is skin/core co-polyester/polyester staple fibers, by FIT company with 201 model supplies.The fusing point of adhesive fiber is 110 ℃ (230 °F), and the precursor spunlaced fabric comprises 15% adhesive fiber.
Embodiment 1～10
Precursor A and E have 1.2 and 1.85 ounces every square yard basic weight respectively.At room temperature longitudinal stretching the results are shown in the following table 1.
Table 1
Embodiment Draw ratio (%) Fabric width (in) Fabric width reduces (%) Strain rate %/min
Precursor A 0 76 0 -
1 10 64 16 60
2 15 52 33 87
3 18 44 42 102
4 20 40 Web breaks
Precursor E 0 60 0 -
6 10 55 8 60
7 15 46 23 87
8 18 45 25 102
9 20 43 28 113
10 25 42 Web breaks
Longitudinal stretching at room temperature changes, and it is found that the rate elongation that fabric width can be reduced to a certain degree and improves the gained fibre web.Reduce at about 20% o'clock at fabric width, the gained fibre web can reach greater than 100% along the extending transversely rate, yet, when 50～100% percentage elongations, do not observe any obvious elastic recovery.
Embodiment 11～23
Precursor C and D have 0.8 ounce of every square yard of (27g/m 2) basic weight.At room temperature longitudinal stretching the results are shown in the following table 2.
Table 2
Embodiment Treatment temperature (°F) Draw ratio (%) Fabric width (in) Fabric width reduces (%)
Precursor C 77 0 75 0
11 230 10 33.5 55
12 230 18 17.5 77
13 330 9 34.5 54
14 330 12 25 67
15 330 15 19.5 74
Precursor D 77 0 75 0
16 230 6 52 31
17 230 8 44 41
18 230 10 34.5 54
19 230 18 19 75
20 330 8 42 44
21 330 10 33 56
22 330 14 22.5 70
23 330 16 19.5 74
Opposite with the result in top table 1 and 2, though the spunlaced precursor that does not contain adhesive fiber can reach in the above that similar fabric width reduces under the condition and along the raising of extending transversely rate; Yet, do not find any tangible elastic recovery from 50～100% percentage elongations.In addition, at high temperature but be lower than 230 °F (fusing points of adhesive fiber) down during the precursor of processing A, B, C, D, the gained fabric only shows the elasticity of not half.
Embodiment 24～28
The precursor spunlaced fabric experiences 14% draw ratio under various draft temperatures as mentioned above, carries out the test of percentage elongation and tensile elasticity and recovery characteristic subsequently.The results are shown in the following table 3.
Figure A20068004705300111
The draw ratio that longitudinal stretching at high temperature can reduce fabric width the highest about 75% and about 10% has proved that being enough to reach 50% fabric width reduces.The minimizing of fabric width it is found that it is the function of stretching and temperature on the gained embodiment fibre web, finds that also the raising of extending transversely rate comes from stretching and temperature.In addition, it is to be noted that elasticity (response rate after the elongation) improves with the raising of temperature.
Embodiment 19～38
Make as mentioned above, but basic weight is 0.8 or 1.2oz/yd 2(27 or 40.7g/m 2) the precursor spunlaced fabric stand various draw ratios at various draft temperatures and reduce to meet the requirements of at least 50% fabric width.These embodiment further accept the test of various percentage elongations and extension recovery performance subsequently.Along with the high temperature at 330 stands the longitudinal stretching processing, the physical property of gained fibre web obviously changes, and the percentage elongation under 300% demonstrates the elasticity of commercial value.The results are shown in the following table 4.

Claims (18)

1. a method of making elastic fabric comprises the following steps:
(a) provide a kind of Hydroentangled non-woven precursor web, it mainly contain the inelastic body base fiber and at least the fusing point of 1wt% be lower than the thermoplastic binder fiber of base fiber,
(b) precursor web is heated above the temperature of adhesive fiber fusing point,
(c) longitudinally being enough in the gained elastic fabric reducing precursor fabric width at least 20% and reaching the draw ratio that is higher than 100% cross direction elongation this precursor web that stretches,
(d) fibre web after cooling stretches is removed tension force then to produce fixedly bounding point on adhesive fiber.
2. the process of claim 1 wherein that process velocity is 30m/min at least, preferred 100～300m/min.
3. the method for claim 2, wherein processing strain rate is 10～800%/min.
4. the process of claim 1 wherein that stretching step comprises two groups of S shapes coilings of use rollers.
5. the process of claim 1 wherein that heating steps comprises the temperature that precursor web is heated above the fusing point of some base fiber.
6. elastic fabric that constitutes by the inelastic body fiber, it obtains by following process: at high temperature longitudinally precursor is applied stretching reducing the precursor fabric width and to prolong forebody length more than 20%, and to obtain along the increase of extending transversely rate in elastic fabric be more than 50% of precursor.
7. elastic nonwovens of making by the entanglement precursor web, described fibre web contains the inelastic body base fiber and is less than the non-resilient thermoplastic binder fiber that 30% fusing point is lower than base fiber, wherein precursor web longitudinally stretches at the high temperature that is higher than the adhesive fiber fusing point, obtaining 100%～500% extending transversely rate more than 20% and in elastic nonwovens to reduce the precursor fabric width, is 30～95% from the response rate of 50% percentage elongation.
8. the elastic fabric of claim 7, the response rate under 100% percentage elongation is 40～85%.
9. the elastic fabric of claim 7, the response rate under 150% percentage elongation is 15～75%.
10. the elastic fabric of claim 7 comprises the adhesive fiber of 1wt% at least.
11. the elastic fabric of claim 7 takes to be selected from the form of perforated fabric, mesh fabric and reticulated.
12. the elastic fabric of claim 7 comprises thermoplasticity basis fiber, be selected from polypropylene, polyethylene, polyester, acrylic compounds, polystyrene, polyamide and thermoplastic fibre be selected from wooden oar, cotton, artificial silk and day thread non-thermoplastic fiber's mixture.
13. the elastic fabric of claim 7, comprise adhesive fiber, be selected from polypropylene, polyethylene, polyester, acrylic compounds, polystyrene, polyamide, copolyesters, skin/core copolyesters/polyester, skin/core polyethylene/polyester and skin/core nonelastomeric polyolefins/elastomer.
14. the elastic fabric of claim 7 comprises thermoplastic fibre and the base fiber blend that is selected from the non-thermoplastic fiber of cotton, wood and synthetic fiber.
15. the elastic fabric of claim 13, wherein synthetic fiber are aramid fibres.
16. the elastic fabric of claim 7 comprises polyester thermoplasticity basis fiber and skin/core binder fiber, its SMIS is a polyester.
17. the elastic fabric of claim 16, wherein skin is a copolyesters.
18. the elastic fabric of claim 16, wherein skin is a polyethylene.
CNA2006800470532A 2005-12-15 2006-12-14 Hydroentangled elastic nonwoven sheet Pending CN101331258A (en)

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EP3084057A4 (en) * 2013-12-20 2017-08-09 Kimberly-Clark Worldwide, Inc. Hydroentangled elastic filament-based, stretch-bonded composites and methods of making same
DE102015200275A1 (en) * 2015-01-12 2016-07-14 Hp Pelzer Holding Gmbh 3-dimensional high-strength fiber composite component and method for its production
DE102015010105B4 (en) * 2015-08-03 2017-08-24 Sandler Ag A stretchable nonwoven fabric, process for making a stretchable nonwoven fabric and use thereof
US10415166B2 (en) * 2017-05-15 2019-09-17 Jacob Holm & Sons Ag Hydroentangled airlaid process and industrial wipe products

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WO2007070624A3 (en) 2007-08-16

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