CN100999856A - Extensible non-woven cloth - Google Patents
Extensible non-woven cloth Download PDFInfo
- Publication number
- CN100999856A CN100999856A CNA2007100023342A CN200710002334A CN100999856A CN 100999856 A CN100999856 A CN 100999856A CN A2007100023342 A CNA2007100023342 A CN A2007100023342A CN 200710002334 A CN200710002334 A CN 200710002334A CN 100999856 A CN100999856 A CN 100999856A
- Authority
- CN
- China
- Prior art keywords
- fiber
- elastic
- elastomer
- layer
- nonwoven fabrics
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004744 fabric Substances 0.000 title description 5
- 210000004177 elastic tissue Anatomy 0.000 claims abstract description 120
- 239000004745 nonwoven fabric Substances 0.000 claims abstract description 108
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 26
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 13
- 229920001971 elastomer Polymers 0.000 claims description 122
- 239000000806 elastomer Substances 0.000 claims description 120
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 13
- 239000012968 metallocene catalyst Substances 0.000 claims description 8
- 238000006116 polymerization reaction Methods 0.000 claims description 4
- 239000000835 fiber Substances 0.000 abstract description 279
- 229920006124 polyolefin elastomer Polymers 0.000 abstract description 7
- 239000010410 layer Substances 0.000 description 207
- 238000000034 method Methods 0.000 description 80
- 230000015572 biosynthetic process Effects 0.000 description 65
- 239000011347 resin Substances 0.000 description 58
- 229920005989 resin Polymers 0.000 description 58
- 239000000463 material Substances 0.000 description 54
- 238000004049 embossing Methods 0.000 description 31
- 238000009987 spinning Methods 0.000 description 28
- 239000007921 spray Substances 0.000 description 17
- 239000004711 α-olefin Substances 0.000 description 16
- 230000035699 permeability Effects 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 13
- 230000008569 process Effects 0.000 description 12
- 239000004743 Polypropylene Substances 0.000 description 10
- -1 polyethylene terephthalate Polymers 0.000 description 10
- 229920001155 polypropylene Polymers 0.000 description 10
- 239000002131 composite material Substances 0.000 description 9
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 9
- 238000009960 carding Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 229920000098 polyolefin Polymers 0.000 description 6
- 229920000089 Cyclic olefin copolymer Polymers 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 238000007664 blowing Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 230000004927 fusion Effects 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 239000004698 Polyethylene Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000002074 melt spinning Methods 0.000 description 4
- 229920000573 polyethylene Polymers 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 239000000470 constituent Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920002635 polyurethane Polymers 0.000 description 3
- 239000004814 polyurethane Substances 0.000 description 3
- 229920005604 random copolymer Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- ZGEGCLOFRBLKSE-UHFFFAOYSA-N 1-Heptene Chemical compound CCCCCC=C ZGEGCLOFRBLKSE-UHFFFAOYSA-N 0.000 description 2
- AFFLGGQVNFXPEV-UHFFFAOYSA-N 1-decene Chemical compound CCCCCCCCC=C AFFLGGQVNFXPEV-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N 1-nonene Chemical compound CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- 206010009866 Cold sweat Diseases 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical group C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 150000001399 aluminium compounds Chemical class 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000003490 calendering Methods 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 125000000058 cyclopentadienyl group Chemical group C1(=CC=CC1)* 0.000 description 2
- 238000001938 differential scanning calorimetry curve Methods 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052726 zirconium Inorganic materials 0.000 description 2
- HFDVRLIODXPAHB-UHFFFAOYSA-N 1-tetradecene Chemical group CCCCCCCCCCCCC=C HFDVRLIODXPAHB-UHFFFAOYSA-N 0.000 description 1
- 238000001644 13C nuclear magnetic resonance spectroscopy Methods 0.000 description 1
- YHQXBTXEYZIYOV-UHFFFAOYSA-N 3-methylbut-1-ene Chemical compound CC(C)C=C YHQXBTXEYZIYOV-UHFFFAOYSA-N 0.000 description 1
- LDTAOIUHUHHCMU-UHFFFAOYSA-N 3-methylpent-1-ene Chemical compound CCC(C)C=C LDTAOIUHUHHCMU-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- NOQGZXFMHARMLW-UHFFFAOYSA-N Daminozide Chemical group CN(C)NC(=O)CCC(O)=O NOQGZXFMHARMLW-UHFFFAOYSA-N 0.000 description 1
- 238000005481 NMR spectroscopy Methods 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000001467 acupuncture Methods 0.000 description 1
- OFHCOWSQAMBJIW-AVJTYSNKSA-N alfacalcidol Chemical compound C1(/[C@@H]2CC[C@@H]([C@]2(CCC1)C)[C@H](C)CCCC(C)C)=C\C=C1\C[C@@H](O)C[C@H](O)C1=C OFHCOWSQAMBJIW-AVJTYSNKSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 125000005234 alkyl aluminium group Chemical group 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000012662 bulk polymerization Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003426 co-catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 150000001923 cyclic compounds Chemical class 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000000113 differential scanning calorimetry Methods 0.000 description 1
- 230000010339 dilation Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002803 maceration Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- GQEZCXVZFLOKMC-UHFFFAOYSA-N n-alpha-hexadecene Natural products CCCCCCCCCCCCCCC=C GQEZCXVZFLOKMC-UHFFFAOYSA-N 0.000 description 1
- YWAKXRMUMFPDSH-UHFFFAOYSA-N pentene Chemical group CCCC=C YWAKXRMUMFPDSH-UHFFFAOYSA-N 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 229920002742 polystyrene-block-poly(ethylene/propylene) -block-polystyrene Polymers 0.000 description 1
- 229920000346 polystyrene-polyisoprene block-polystyrene Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
Landscapes
- Nonwoven Fabrics (AREA)
Abstract
The invention provides a flexible non-woven fabric, comprising an elastic fibrous layer which contains elastic fiber and other elastic fiber or unelastic fiber different from the above elastic fiber. The elastic fiber is formed by polyolefin elastomer mainly having propylene of 80-90 wt.%, and the density of the polyolefin elastomer is 0.855-0.880g/cm<3>. The elastic fiber with the polyolefin elastomer can be consisted of only the polyolefin elastomer, or comprises the polyolefin elastomer and other thermoplastic elastomer. An unelastic fibrous layer which is substantially unelastic is provided on at least one face of the elastic fibrous layer.
Description
Technical field
The present invention relates to flexible nonwoven fabrics.
Background technology
Fiber that the known various copolymer that contains by TPO constitutes and nonwoven fabric with retractility.For example open and put down in writing a kind of flexible nonwoven fabrics that constitutes by the fiber that contains the propylene-alpha-olefin random copolymer in the 2003-49352 communique the spy.This propylene-alpha-olefin random copolymer is to use metallocene catalyst polymerisation to obtain, and the content of alpha-olefin is 2～23 moles of %.This nonwoven fabric shows retractility by implementing heat treated.That is, the above-mentioned fiber itself that contains the propylene-alpha-olefin random copolymer does not have elasticity.Therefore, the expansion performance of this nonwoven fabric is abundant inadequately.
Open the spy and to have put down in writing a kind of duplexer in the 2003-53894 communique, it is obtained by following method: configuration polyurethane nonwoven fabric on the one side of the meltblown nonwoven fabric that is made of the TPO elastomer, on another side, dispose the circular web that constitutes by the polyethylene terephthalate long fiber simultaneously, and they are handled by calendering engage, wherein said TPO elastomer is made of ethene-alpha-olefin copolymer.The density of this ethene-alpha-olefin copolymer is 0.90g/cm
3More than, alpha-olefin content is 8～25 moles of %.Shrinkage after described duplexer is stretched does not claim fully.
As the flexible nonwoven fabrics that has used ethene-alpha-olefin copolymer, the applicant had before proposed a kind of following flexible nonwoven fabrics (opening flat 9-291454 communique with reference to the spy), it is the 1st composition with the hard elastics composition that is made of crystalline polypropylene, with thermoplastic elastomer (TPE) is the 2nd composition, and by being sheath with the 1st composition, being that the core-sheath-type telescopic resilience composite fibre of core constitutes that wherein thermoplastic elastomer (TPE) is made of ethene one alpha olefin copolymer that uses the metallocene catalyst manufacturing with the 2nd composition.The retractility of this nonwoven fabric is good, and has the same feel of cloth.But, need the higher nonwoven fabric of retractility.
Summary of the invention
The invention provides a kind of flexible nonwoven fabrics, it has and comprises elastomer and other elastomer different with this elastomer or the elastic fibrous layer of non-elastic fiber, and described elastomer contains the TPO elastomer based on propylene; Propylene content in the described TPO elastomer is 80～90 weight %, and the elastomeric density of this TPO is 0.855～0.880g/cm
3
Description of drawings
Fig. 1 is the schematic diagram of cross-section structure of an embodiment of flexible nonwoven fabrics of the present invention.
Fig. 2 is the schematic diagram that is used to make the preferred embodiment of flexible nonwoven fabrics shown in Figure 1.
Fig. 3 is the schematic diagram of an example of structure that forms the spinning die head that spins the spray device for spinning of device in the device shown in Figure 2 as the 2nd fiber web.
Fig. 4 is the vertical view of an example of the expression fibre sheet material of implementing stretch process.
Fig. 5 (a) is the profile along the a-a line of the CD direction of fibre sheet material shown in Figure 4.
Fig. 5 (b) is the profile corresponding to Fig. 5 (a) that has produced the state (state that is stretched) of distortion between concavo-convex roller.
Fig. 5 (c) is the profile along the c-c line of the CD direction of fibre sheet material shown in Figure 4.
Fig. 5 (d) is the profile corresponding to Fig. 5 (c) that has produced the state (state that is stretched) of distortion between concavo-convex roller.
The specific embodiment
It is following that the present invention will be described according to embodiment preferred.Flexible nonwoven fabrics of the present invention has elastic fibrous layer.Flexible nonwoven fabrics can only be made of elastic fibrous layer, also can be laminated with stiff in fact non-elastic fiber layer as described later as shown in Figure 1 on its at least one face.Elastic fibrous layer contains elastomer.Elastic fibrous layer or only be made of elastomer perhaps contains the non-elastic fiber of elastomer and extensibility.Elastomer can use more than a kind or 2 kinds.When containing non-elastic fiber in the elastic fibrous layer, non-elastic fiber can use more than a kind or 2 kinds.
At least a kind of fiber in the elastomer is to contain based on the elastomeric elastomer of the TPO of propylene.The elastomer that contains in the elastic fibrous layer or only be to contain the elastomeric elastomer of this TPO, or this elastomer and other elastomer different with this elastomer.
Contain the elastomeric elastomer of said polyolefins class or only constitute by this TPO elastomer, perhaps contain this TPO elastomer and other more than a kind or 2 kinds resin and constitute.
Elastomeric being characterised in that of said polyolefins class of using among the present invention contained the propylene and the low-density of specified quantitative.This TPO elastomer promptly is a propylene-alpha-olefin copolymers based on propylene.Propylene content in this TPO elastomer is 80～90 weight %.And the elastomeric density of TPO is 0.855～0.880g/cm
3The propylene content of this scope is compared the lower level that is in the elastomeric propylene content of polypropylene type that uses in the past, and the density of this scope is compared the lower level that is in the elastomeric density of using of polypropylene type in the past.That is, the TPO of using in the present embodiment is elastomeric to be characterised in that, hangs down propylene content and has low-density.Contain by use have above-mentioned feature the TPO elastomer as the elastomer that constitutes resin, flexible nonwoven fabrics of the present invention is compared with flexible nonwoven fabrics in the past, its expansion performance further improves.
Particularly,, therefore when elastomer is carried out melt spinning, be not easy to produce broken end, can easily make the continuous fibers of thin diameter because above-mentioned TPO elastomer has low propylene content and low-density.Elastomer can be made the raising that thin diameter goes far towards expansion performance.Elastomer can be made the raising that continuous fibers (long filament) also goes far towards expansion performance.In addition, because above-mentioned TPO elastomer has low propylene content and low-density, so the operability of elastomer itself (for example be not easy deadlocked etc.) becomes good.And then also can suppress the surperficial balling-up of flexible nonwoven fabrics.In addition, the TENSILE STRENGTH of elastomer itself improves, and then the TENSILE STRENGTH of flexible nonwoven fabrics also improves.And, as described later, elastic fibrous layer and non-elastic fiber layer are being carried out when stacked two-layer melt bonded property raising.From above-mentioned viewpoint, when the elastomeric propylene content of TPO particularly was set at 82～88 weight %, above-mentioned various characteristics further improved.The elastomeric density of TPO is set at 0.860～0.870g/cm
3The time, same effect is also arranged.
Propylene content in the TPO elastomer adopts following method to measure.The TPO elastomer is carried out
13C-NMR measures.Calculate the weight ratio of propylene and other alpha-olefin composition from the NMR collection of illustrative plates that obtains.Then, the weight ratio of propylene is converted into percentage, with it as propylene content.In addition, the elastomeric density of TPO is measured according to the C method (method of drifting along) of JIS-K7112.In addition, the mensuration environment of density is 23 ℃, 50%RH, and maceration extract uses ethanol/distilled water.
The elastomeric polymerization of TPO is not particularly limited, but when using metallocene catalyst as polymerization catalyst, the TPO elastomer that obtains can become the elastomer of homogeneous, thereby is preferred.Polymerization during as the use metallocene catalyst can be used the suspension method of employing atent solvent, be used as the mass polymerization of solvent etc. without the vapor phase method of solvent, with monomer.Metallocene catalyst is with co-catalysts such as metallocene and aluminium compound combinations and obtain, and wherein to be transition metal such as titanium, zirconium and hafnium be clipped in the middle and the compound of the sandwich structure that forms by the unsaturated cyclic compounds of the cyclopentadienyl group of cyclopentadienyl group that contains the pi-electron system or replacement etc. metallocene.As metallocene, can list that for example titanium is luxuriant, zirconium is luxuriant etc.As aluminium compound, can list for example alkylaluminoxane, alkyl aluminum, aluminum halide, aikyl aluminum halide etc.
When being carried out melt spinning, elastomer is not easy to produce broken end more, can easily make diameter more the viewpoint of the continuous fibers of refinement set out, the elastomeric melt flow of TPO (MFR) is preferably 2～350g/10min, is preferably 20～200g/10min especially.MFR measures according to ASTM D-1238.Also have, its condition determination is 230 ℃, load 2.16kg.
The elastomeric melting heat value of TPO A is preferably 2～20mJ/mg, is preferably 4～18mJ/mg especially, and melting heat value B is preferably 12～24mJ/mg, is preferably 13～22mJ/mg especially.Each melting heat value then can improve retractility in above-mentioned scope the time in the TENSILE STRENGTH that keeps appropriateness, and melt spinning becomes well, thereby is preferred.Each melting heat value is obtained by differential scanning calorimetry (DSC).Melting heat value A heats up and obtains the DSC curve with 10 ℃/minute programming rate, is obtained by the heat of the endothermic peak that occurs in 160～165 ℃.Melting heat value B heats up and obtains the DSC curve with 10 ℃/minute programming rate, is obtained by the heat and the melting heat value A sum of the endothermic peak that occurs in 40～60 ℃.
As with the alpha-olefin of copolymerization of propylene, can list carbon number and be 2 or 4～20 alpha-olefin.Can list for example ethene, 1-butylene, 1-amylene, 3-methyl-1-butene, 1-hexene, 3-Methyl-1-pentene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-laurylene, 1-tetradecylene, 1-hexadecylene, 1-octadecylene, 1-icosa alkene etc.Above-mentioned alpha-olefin can use a kind of, also can be used in combination.In the above-mentioned alpha-olefin, especially preferably use ethene, 1-butylene.The material that obtains particularly preferably in polymerization of Alpha-olefin on two end-blocks (the end-blocks molecular weight is more than 5000) position in addition.
The elastomeric weight average molecular weight of TPO is preferably 140,000～280, and 000, be preferably 150,000～240,000 especially.
As mentioned above, in containing the elastomeric elastomer of said polyolefins class,, can only constitute by above-mentioned TPO elastomer as resinous principle, perhaps also can contain above-mentioned TPO elastomer and other more than a kind or 2 kinds resin and constitute.No matter any situation, elastomer can be the forms of staple fibre, perhaps also can be long stapled form.When elastomer contained above-mentioned TPO elastomer and other resin, the elastomeric content of the TPO in the elastomer was preferably 10～99 weight %, is preferably 50～80 weight % especially.
When elastomer contains above-mentioned TPO elastomer and other resin, as this other resin, can use for example with the resin as raw material such as thermoplastic elastomer (TPE)s such as phenylethylene elastomers such as rubber or SBS, SIS, SEBS, SEPS, polyester elastomer, polyurethanes elastomer.They also can make up two kinds with on use.
When elastomer contains above-mentioned TPO elastomer and other resin,, can list the individual fibers that (1) is made of the mixed polymer of above-mentioned TPO elastomer and other resin as the fibre morphology of this elastomer; (2) contain the form of the composite fibre of above-mentioned TPO elastomer and other resin.As this composite fibre, can list core-sheath-type composite fibre, parallel composite fiber, cut apart fiber etc.
Above-mentioned TPO elastomer has aforesaid propylene content and density, also has extraordinary spinnability so promptly use them to carry out melt spinning separately.Therefore, there is no need and improve spinnability with other resin.If also use other resin, then might damage the original retractility that has of TPO elastomer.That is, in elastomer,, especially preferably only constitute by above-mentioned TPO elastomer as resinous principle.
As mentioned above, in elastic fibrous layer, contain the elastomeric elastomer of said polyolefins class, can also contain other elastomer different with this elastomer except comprising.As other elastomer,, its kind is not particularly limited so long as can get final product with containing the fiber that the elastomeric elastomer of said polyolefins class forms nonwoven fabric.As other elastomer, can list the elastomer of thermoplastic elastomer (TPE)s such as for example containing phenylethylene elastomer, polyester elastomer, polyurethanes elastomer.This other elastomer is preferably 5～80 weight % with respect to the mixed proportion of the weight of whole elastomers, is preferably 5～50 weight % especially.
In addition, in elastic fibrous layer, contain the elastomeric elastomer of said polyolefins class, perhaps except containing this elastomer and other elastomer different, can also contain non-elastic fiber with extensibility with this elastomer except comprising.As non-elastic fiber, can list the fiber that constitutes by polyethylene (PE), polypropylene (PP), polyester (PET or PBT), polyamide etc. etc.Non-elastic fiber can be a staple fibre, also can be long fiber, can be hydrophilic, also can be water proofing property.In addition, also can use core-sheath-type or parallel type composite fibre, cut apart fiber, special-shaped section fiber, crimped fibre, heat-shrinkable fibre etc.Above-mentioned fiber can be used alone, and also can make up two or more uses.When elastic fibrous layer contains elastomer and non-elastic fiber and constitutes, from the viewpoint that has good expansion performance, realizes high strength, has good skin sense of touch and improve feel, the former/latter's weight ratio is preferably 20/80～80/20, is preferably 30/70～70/30 especially.
As mentioned above, flexible nonwoven fabrics of the present invention can only be made of elastic fibrous layer, also can be laminated with stiff in fact non-elastic fiber layer on its at least one face.The schematic diagram of cross-section structure of having represented a preferred embodiment of flexible nonwoven fabrics of the present invention among Fig. 1.The formation of the flexible nonwoven fabrics 10 of the present embodiment is to be laminated with identical or different stiff in fact non-elastic fiber layer 2,3 on the two sides of elastic fibrous layer 1.
Elastic fibrous layer 1 is the aggregate that contains elastomer.Elastic fibrous layer 1 has the character that can stretch and produce contraction when having removed tensile force.In elastic fibrous layer 1, on a direction parallel with face, the residual deformation when it is shunk is preferably below 20%, is preferably below 10% especially at least.Preferably on any one direction of MD direction and CD direction, satisfy this value at least, more preferably on both direction, all satisfy this value.
The elastomer that contains in the elastic fibrous layer 1 can use-case such as following method manufacturing: from nozzle bore with fusion resin extruded, make the resin elongation of this molten condition of extruding, the meltblown that fiber is attenuated by hot blast; And the spun-bond process that the resin of semi-molten state is stretched by cold wind or mechanical stretching machine.In addition, as the specific process of meltblown, also can be by the spray method of spinning (spinning blown) of spun-bond process and meltblown combination is made elastomer.
Elastic fibrous layer 1 can be the form that contains the fiber web or the nonwoven fabric of elastomer.For example can be by spinning fiber web or the nonwoven fabric that spray method, spun-bond process, meltblown etc. form.Be preferably especially by spinning the fiber web that the spray method obtains.
In spinning the spray method, use the spinning die head, on this spinning die head, near the front end of the discharge nozzle of molten polymer, a pair of hot blast discharge portion is center and configuration relatively with the said nozzle, and a pair of cold wind discharge portion is center and configuration relatively with the said nozzle in its downstream.According to spinning the spray method, elongation that fused fiber produces because of hot blast and the cold stretch that produces because of cold wind are carried out continuously, therefore have the advantage of carrying out the shaping of elastic fibre easily.In addition, it is excessively intensive that fiber can not become, and the elastic fibre of the such thickness of similar staple fibre that can be shaped is so also have the advantage that can access the high nonwoven fabric of gas permeability.And then, according to spinning the spray method, can obtain the fiber web of continuous filament yarn.The fiber web of continuous filament yarn is compared with the fiber web of staple fibre, and the fracture when being not easy high the elongation taken place demonstrates flexibility, easily so extremely beneficial in the present embodiment.
As the spinning die head that is used to spin the spray method, for example can use the die head shown in Fig. 1～Fig. 4 of die head shown in special Fig. 2 that opens flat 3-174008 communique and No. 3335949 communique of special permission.
Although non-elastic fiber layer 2,3 has extensibility, it is stiff in fact fibrage.Here said extensibility, it can be the situation that constitutes the fiber itself elongation, constitute fiber itself not extend although also can be, but two fibers that the intersection point place heat fusing between fiber is bonding are separated from each other, or change by the stereochemical structure recurring structure that forms such as bonding of the heat fusing between the fiber by many fibers, or constitute fiber and broken, thereby any in the situation of fibrage overall elongated.
As the fiber that constitutes non-elastic fiber layer 2,3, can use the identical fiber of non-elastic fiber of the extensibility that can in elastic fibrous layer 1, contain with the conduct that had before illustrated.Non-elastic fiber layer 2,3 can be the fiber web or the nonwoven fabric of continuous filament yarn or staple fibre.Particularly, from the viewpoint of the bulk non-elastic fiber layer 2,3 that can be formed with thickness, above-mentioned non-elastic fiber layer is the fiber web of staple fibre preferably.Two non-elastic fiber layers 2,3 can be the same or different at aspects such as the material that constitutes fiber, mass area ratio, thickness.Constituting fiber is under the situation of core-sheath-type composite fibre, and preferred core is PET, PP, and sheath is low-melting PET, PP, PE.When particularly using above-mentioned composite fibre, and the bonding grow of heat fusing between the formation fiber of elastic fibrous layer, be not easy genetic horizon and peel off, be preferred from this viewpoint.
The thickness of at least one in two non-elastic fiber layers 2,3 is preferably 1.2～20 times of thickness of elastic fibrous layer 1, is preferably 1.5～5 times especially.On the other hand, preferred its mass area ratio of at least one in the units concerned's area quality, two non-elastic fiber layers 2,3 is lower than the mass area ratio of elastic fibrous layer.In other words, the non-elastic fiber layer is preferably little than elastic fibrous layer than elastomer bed thickness and mass area ratio.Because thickness and mass area ratio satisfy aforesaid relation, just become the bulk fibrage that thickness is arranged so the non-elastic fiber layer is compared with elastic fibrous layer.Its result, flexible nonwoven fabrics 10 becomes softness and the good nonwoven fabric of feel.
The thickness of relevant non-elastic fiber layer 2,3 itself is preferably 0.05～5mm, is preferably 0.1～0.5mm especially.On the other hand, the thickness of relevant elastic fibrous layer 1 itself, preferably the thickness than non-elastic fiber layer 2,3 is little, particularly, is preferably 0.01～2mm, is preferably 0.1～0.2mm especially.Determination of thickness can be observed the section of flexible nonwoven fabrics with microscope under 50～200 times multiplying power, obtain each average thickness within the vision respectively, and obtain the average thickness value of 3 field ranges.
The mass area ratio of relevant non-elastic fiber layer 2,3 itself from the viewpoint on the surface of even covering elastic fibrous layer and the viewpoint of residual deformation, is preferably 1～60g/m respectively
2, be preferably 5～15g/m especially
2On the other hand, the mass area ratio of relevant elastic fibrous layer 1 itself, from the viewpoint of expansion performance and residual deformation, preferably the mass area ratio than non-elastic fiber layer 2,3 is big, particularly, is preferably 5～80g/m
2, be preferably 10～40g/m especially
2
The fibre diameter of relevant formation fiber, the fibre diameter of the formation fiber of elastic fibrous layer 1 are preferably 1.2～5 times of fibre diameter of the formation fiber of at least one non-elastic fiber layer 2,3, are preferably 1.2～2.5 times especially.In addition, from the viewpoint of gas permeability and expansion performance, the fibre diameter of the formation fiber of elastic fibrous layer 1 is preferably more than the 5 μ m, is preferably especially more than the 10 μ m, is preferably below the 100 μ m, is preferably especially below the 40 μ m.On the other hand, the fibre diameter of the formation fiber of non-elastic fiber layer 2,3 is preferably 1～30 μ m, is preferably 10～20 μ m especially.That is, as the formation fiber of non-elastic fiber layer 2,3, the preferred use fiber thinner slightly than the formation fiber of elastic fibrous layer 1.Thus, can increase the melt bonded point of the formation fiber of the non-elastic fiber layer 2,3 that is positioned at the top layer.The increase of melt bonded point is effective to preventing that flexible nonwoven fabrics 10 from producing balling-up.And then, can obtain the good flexible nonwoven fabrics of skin sense of touch 10 by using thin slightly fiber.
As shown in Figure 1, elastic fibrous layer 1 and non-elastic fiber layer 2,3 preferably keep engaging with whole face by the heat fusing of fiber intersection point is bonding under the state of fibre morphology at the formation fiber of elastic fibrous layer 1.That is, preferred engagement state is different with the flexible nonwoven fabrics in the past of local engagement.The flexible nonwoven fabrics of the present embodiment is under the situation that elastic fibrous layer 1 and non-elastic fiber layer 2,3 engage with whole face, the interface of elastic fibrous layer 1 and non-elastic fiber layer 2,3 and near, the intersection point heat fusing of the formation fiber of the formation fiber of elastic fibrous layer 1 and non-elastic fiber layer 2,3 is bonding, engages equably with whole face in fact.By engaging with whole face, can prevent to produce bulge between elastic fibrous layer 1 and the non-elastic fiber layer 2,3, promptly can prevent two separate and form the space.If between two-layer, produce bulge, the then one sense of elastic fibrous layer and non-elastic fiber layer forfeiture, the feel of flexible nonwoven fabrics 10 has a declining tendency.With the preferred embodiments of the invention that whole face engages, can provide flexible nonwoven fabrics according to elastic fibrous layer 1 and non-elastic fiber layer 2,3 just like the such sandwich construction of the nonwoven fabric of individual layer with one sense.
So-called " the formation fiber of elastic fibrous layer 1 keeps the state of fibre morphology " be not even the nearly all formation fiber that is meant elastic fibrous layer 1 is deformed into the state of film shape or film one fibre structure yet under the situation that has been applied in heat or pressure etc.Because the formation fiber of elastic fibrous layer 1 is in the state that keeps fibre morphology, therefore has the advantage of the flexible nonwoven fabrics 10 sufficient gas permeabilities of the present embodiment of giving.
In the layer of elastic fibrous layer 1, the intersection point generation heat fusing that constitutes fiber is bonding.Equally, in the layer of non-elastic fiber layer 2,3, it is bonding that the intersection point of formation fiber also produces heat fusing.
In in two non-elastic fiber layers 2,3 at least one, be in its part and constitute that fiber enters into the state of elastic fibrous layer 1 and/or the part of elastic fibrous layer constitutes the state that fiber enters at least one non-elastic fiber layer 2,3.Owing to be in above-mentioned state, thereby can promote the integrated of elastic fibrous layer 1 and non-elastic fiber layer 2,3, prevent from more effectively between two-layer, to produce bulge.The result becomes layer and the layer combination of shapes state together with the surface of following each layer.In the formation fiber of non-elastic fiber layer, its part enters into elastic fibrous layer 1 and till the there, or penetrates elastic fibrous layer 1 and arrive another non-elastic fiber layer.When imagination on a macro scale in each layer separately during the face between the connected surfaces fiber, in the fibre space that the inboard from this towards layer forms, the part of other layer constitutes fiber and enters along the sectional thickness direction of above-mentioned layer.When the formation fiber of non-elastic fiber layer enters into elastic fibrous layer 1 and till the there time, this constitute fiber preferred further with the formation fiber interweaving of elastic fibrous layer 1 together.Equally, when the formation fiber of non-elastic fiber layer penetrates elastic fibrous layer 1 and when arriving another non-elastic fiber layer, this constitute fiber preferably with the formation fiber interweaving of another non-elastic fiber layer together.This can be when observing the thickness direction section of flexible nonwoven fabrics with SEM or microscope etc., and the fact that interlayer does not form the space in fact obtains confirming.In addition, said here " interweaving ", being meant the state that fiber fully is intertwined each other, the definition that interweaves does not comprise the state that fibrage only overlaps.Whether being in the state that interweaves for example can judge by the following method: will be when the state that fibrage only overlaps is peeled off fibrage required power and overlapping fibrage also are suitable for it and peel off the required power of fibrage after the bonding hot blast method of heat fusing and compare, in the time can confirming to have substantial difference between the two, can judge the state that interweaves that is in.
For the formation fiber that makes the non-elastic fiber layer enters into elastic fibrous layer and/or makes the formation fiber of elastic fibrous layer enter into the non-elastic fiber layer, preferably before carrying out the processing that the formation fiber heat fusing of the formation fiber of non-elastic fiber layer and elastic fibrous layer is bonding, at least one side of non-elastic fiber or elastomer is fiber web state (also not having the bonding state of heat fusing).Constitute the viewpoint that fiber enters into other layer from making, because compare the free degree of staple fibre with long fiber higher, thereby the fibrage of optimum fiber net state.
In addition, for the formation fiber that makes the non-elastic fiber layer enters into elastic fibrous layer 1 and/or makes the formation fiber of elastic fibrous layer enter into the non-elastic fiber layer, preferably use the hot blast method.By using the hot blast method, can make the formation fiber enter into relative fibrage easily, and the formation fiber is entered from relative fibrage easily.In addition,, can both keep the bulkiness of non-elastic fiber layer, and make the formation fiber of non-elastic fiber layer enter into elastic fibrous layer 1 easily again by using the hot blast method.Penetrate elastic fibrous layer 1 and arrive under the situation of another non-elastic fiber layer at the formation fiber that makes the non-elastic fiber layer, preferably use the hot blast method too.Especially preferably the hot blast method is used in the non-elastic fiber layer and the stacked back of elastic fibrous layer of fiber web state.At this moment, in elastic fibrous layer, it constitutes between fiber can heat fusing bonding.Moreover, illustrated in the manufacture method as described later, owing to implement the hot blast method under given conditions, and in order to make hot blast unobstructed and be provided with the air permeability of the gas permeability of flexible nonwoven fabrics, particularly elastic fibrous layer higher, thereby fiber is entered more equably.Can also use method beyond the hot blast method, for example blow the method for steam.In addition, also can use jet net-spraying method, needle point method etc., but this moment the non-elastic fiber layer bulkiness can suffer damage, perhaps the formation fiber of elastic fibrous layer can be gone to the surface and comes up, the feel of the flexible nonwoven fabrics that obtains has a declining tendency.
Particularly under the situation of the formation fiber interweaving of the formation fiber of non-elastic fiber layer and elastic fibrous layer 1, preferably only adopt the hot blast method to interweave.
In order to adopt the hot blast method to make fiber interweaving, suitably adjust the blowing pressure, blow speed of gas, fibrolaminar mass area ratio and thickness, fibrolaminar travelling speed etc. and get final product.Condition when adopt making common hot blast method nonwoven fabric then can not make the formation fiber of non-elastic fiber layer and the formation fiber interweaving of elastic fibrous layer 1.Illustrated in the manufacture method as described later, by implementing the hot blast method under given conditions, can obtain the flexible nonwoven fabrics of wanting required for the present invention.
The hot blast method generally is to make the gas that is heated to set point of temperature connect fibrolaminar thickness direction.In this case, can produce interweaving and fiber intersection point melt bonded of fiber simultaneously.But in the present embodiment, there is no need by making the fiber intersection point melt bonded between the formation fiber of hot blast method in each layer.In other words, the hot blast method is to enter into elastic fibrous layer 1 for the formation fiber that makes the non-elastic fiber layer, or in order to make the formation fiber interweaving of this formation fiber and elastic fibrous layer 1, and make the bonding and essential operation of formation fiber heat fusing of the formation fiber and the elastic fibrous layer of non-elastic fiber layer.In addition, the direction that fiber entered is along with the position relation of passing through between direction and non-elastic fiber layer and the elastic fibrous layer that is heated gas changes.The non-elastic fiber layer preferably makes the melt bonded hot blast method nonwoven fabric that becomes of fiber intersection point by the hot blast method in it constitutes fiber.
Can understand from above explanation, in the preferred version of the flexible nonwoven fabrics of the present embodiment, the thickness direction inside of substantially stiff non-resilient hot blast method nonwoven fabric, contain and constitute the elastic fibrous layer 1 that fiber has kept this state of fibre morphology, a part that becomes this hot blast method nonwoven fabric constitutes that fiber enters into the state of elastic fibrous layer 1 and/or the part of elastic fibrous layer constitutes the state that fiber enters into the non-elastic fiber layer.In preferred scheme, the formation fiber that the part of hot blast method nonwoven fabric constitutes fiber and elastic fibrous layer 1 only interweaves by the hot blast method.Because elastic fibrous layer 1 contains in the inside of hot blast method nonwoven fabric, so the formation fiber of elastic fibrous layer 1 is not present in the surface of flexible nonwoven fabrics in fact.This never can produce the viewpoint of the peculiar sense of being clamminess of elastomer, and to set out be preferred.
In the flexible nonwoven fabrics 10 of the present embodiment, as shown in Figure 1, on non-elastic fiber layer 2,3, be formed with small recess.Thus, the section of flexible nonwoven fabrics 10 undulate shape on microcosmic.This wave-like is illustrated in the manufacture method as described later, is that the stretch process by flexible nonwoven fabrics 10 produces.This wave-like is that the result who has given flexible nonwoven fabrics 10 retractilities produces, and the feel of nonwoven fabric 10 itself is not had big influence.
Although in Fig. 1, do not show, also can implement embossing processing to the flexible nonwoven fabrics 10 of the present embodiment.Embossing processing is carried out for the bond strength that further improves between elastic fibrous layer 1 and the non-elastic fiber layer 2,3.Therefore, if elastic fibrous layer 1 and non-elastic fiber layer 2,3 are fully engaged, then there is no need to carry out embossing processing by the hot blast method.In addition, although embossing processing is to make to constitute between the fiber to engage, it is different with the hot blast method, can not make to constitute between the fiber by embossing processing to interweave.
In the flexible nonwoven fabrics 10 of the present embodiment, in its face, has retractility at least one direction of direction.Has retractility on also can be in face all directions.At this moment, can not avoid the degree of retractility different because of the difference of direction.The direction of relevant maximal dilation, the degree of retractility are that 100% o'clock load of elongation is preferably 20～500cN/25mm, are preferably 40～150cN/25mm especially.And the residual deformation when extending 100% state it is shunk is preferably below 15%, is preferably below 10% especially.
The flexible nonwoven fabrics 10 of the present embodiment is from the viewpoint of its good hand feeling and anti pilling property, retractility, gas permeability, can be used for surgery with various uses such as clothing class and cleaning sheets.Be preferably used as the constituent material of absorbent commodities such as sanitary napkin and disposable diaper especially.For example, can be as the sheet material of the outer surface that constitutes disposable diaper, in order to give sheet material that waistline portion or waist, leg enclose elastic extensions such as portion etc.In addition, can be as the sheet material of the retractility alar part that forms sanitary napkin etc.In addition, even the position beyond above-mentioned also can be used to want to give the position of retractility etc.The mass area ratio of flexible nonwoven fabrics and thickness can suitably be adjusted according to its concrete purposes.For example when the constituent material as absorbent commodity used, the preferred unit area quality was 20～160g/m
2About, thickness is about 0.1～5mm.In addition, flexible nonwoven fabrics of the present invention is because the formation fiber of elastic fibrous layer is keeping fibre morphology, so softness and gas permeability increase.The flexural rigidity of relevant yardstick as flexibility, it is nonwoven fabric low like this below the 10g/30mm that flexible nonwoven fabrics of the present invention is preferably formed bending rigid value.Relevant gas permeability, preferred air permeability is more than the 16m/ (kPas).In addition, percentage elongation is preferably more than 100%.
Flexural rigidity is measured according to JIS L-1096, and adopting cloth flexibility test device (handle-o-meter) is that 8mm, gap width are under the condition of 10mm in the amount of clamp-oning, the mean value when trying to achieve on each flow direction and rectangular with it direction bending.Air permeability is that the AUTOMATIC AIR-PERMEABILITYTESTER KES-F8-AP1 that adopts KATO TECH company to make measures air permeance resistance, and obtains its inverse.
Below, the preferable production process of the flexible nonwoven fabrics 10 of the present embodiment is described with reference to Fig. 2.In Fig. 2, illustrate the preferred manufacturing installation that uses in the manufacture method of flexible nonwoven fabrics 10 of the present embodiment.In device shown in Figure 2, have fiber web formation portion 100, hot blast handling part 200 and extension section 300 successively towards the downstream from the upstream side of manufacturing process.
In fiber web formation portion 100, have the 1st fiber web and form device the 21, the 2nd fiber web formation device 22 and the 3rd fiber web formation device 23.Form device 21 and the 3rd fiber web formation device 23 as the 1st fiber web, use carding machine.As carding machine, can use with this technical field in the same carding machine of normally used carding machine, and be not particularly limited.On the other hand, form device 22, use and spin the spray device for spinning as the 2nd fiber web.In spinning the spray device for spinning, has the spinning die head, on this spinning die head, near the front end of the discharge nozzle of molten polymer, a pair of hot blast discharge portion is that the center disposes relatively with the said nozzle, and a pair of cold wind discharge portion is that the center disposes relatively with the said nozzle in its downstream.As spinning the spinning die head that uses in the spray method, for example can use the die head shown in Fig. 1～Fig. 4 of die head shown in special Fig. 2 that opens flat 3-174008 communique and No. 3335949 communique of special permission.
Hot blast handling part 200 has hot-blast stove 24.In hot-blast stove 24, can blow out the heated air that is heated to set point of temperature, particularly add hot-air.After 3 layers of overlapped fiber web were imported in the hot-blast stove, heated air connected towards the below or towards opposite direction or towards both direction forcibly from this fibroreticulate top.
Manufacture method to the flexible nonwoven fabrics that used the device with above structure describes below.At first, a pair of fiber web that configuration is made of identical or different non-elastic fiber on fibroreticulate each face that is made of elastomer.In addition, so-called " fiber web that constitutes by elastomer ", not only be meant the fiber web that only constitutes by elastomer, in the scope of the telescopic resilience that does not damage the elastic fibrous layer (layer of representing with symbol 1 among Fig. 1) that forms by this fiber web, also comprise the fiber web that except elastomer, also contains a small amount of non-elastic fiber.
As shown in Figure 2, in fiber web formation portion 100, use stiff staple fibre, make non-elastic fiber net 3 ', and it is transported continuously towards a direction by the carding machine that forms device 21 as the 1st fiber web as raw material.The elastic resin that use is made of TPO elastomer etc. is as raw material, spray the spun fiber accumulations of device for spinning on the conveyer belt that constitutes by the capture WEB by form spinning of device 22 as the 2nd fiber web, make the elastic webs 1 ' of the continuous filament yarn that contains elastomer.With its from conveyer belt strip down and be layered in by the 1st fiber web form that device 21 forms and the non-elastic fiber net 3 ' that transports continuously towards a direction on.The stacked again non-elastic fiber net of making by the carding machine that forms device 23 as the 3rd fiber web 2 ' on this elastic webs 1 '.
Use in the formation of elastic webs 1 ' when spinning the spray method, fused fiber produces elongation because of hot blast and the cold stretch that produces because of cold wind is carried out continuously, so have the advantage of carrying out the shaping of elastic fibre easily.In addition, because fiber can not become too intensive, can be shaped is similar to the elastic fibre of the such thickness of staple fibre, so also have the advantage that can obtain the high nonwoven fabric of gas permeability.And then, can obtain the fiber web of continuous filament yarn according to spinning the spray method.The fiber web of continuous filament yarn is compared with the fiber web of staple fibre, and the fracture when being not easy high the elongation taken place demonstrates flexibility easily, is extremely beneficial in the present embodiment therefore.
When elastic webs 1 ' for example is made of two kinds of fibers, particularly, when elastic webs 1 ' when containing the elastomeric elastomer of above-mentioned TPO and constitute or when containing elastomeric elastomer of above-mentioned TPO and non-elastic fiber and constitute with other elastomer different with this elastomer, the spinning die head that spins the spray device for spinning as shown in Figure 2 can use spinning die head shown in Figure 3.Spinning die head shown in Figure 3 has spinning-nozzle A and spinning-nozzle B replaces structure arranged.Contain the elastomeric resin of above-mentioned TPO from spinning-nozzle A discharge.On the other hand, discharge other thermoplastic elastomer (TPE) or stiff resin from spinning-nozzle B.
3 fibroreticulate duplexers are sent in the hot-blast stove 24 of hot blast mode, are subjected to hot blast here and handle.Handle by hot blast, the intersection point heat fusing between the fiber is bonding, and elastic webs 1 ' engages with non-elastic fiber net 2 ', 3 ' on its whole.When hot blast was handled, preferably each layer fiber web also do not form one.It is bulk and have the state of thickness also can keep after hot blast is handled that each fiber web had thus, thereby obtain the good flexible nonwoven fabrics of feel.
Make the intersection point heat fusing between the fiber bonding except handling by hot blast, make outside each layer fiber web engage with whole face, also preferably make the part of the non-elastic fiber net 2 ' of the face that blows one side that mainly is arranged in hot blast constitute fiber and enter into elastic webs 1 '.In addition, preferably the condition of handling by the control hot blast makes the part of non-elastic fiber net 2 ' constitute fiber and enters into elastic webs 1 ', the formation fiber interweaving of further preferred and this fiber web 1 '.Perhaps preferably make the part of non-elastic fiber net 2 ' constitute that fiber penetrates elastic webs 1 ' and arrive in the non-elastic fiber net 3 ', and with the formation fiber interweaving of this fiber web 3 '.
Making the part of non-elastic fiber net 2 ' constitute fiber enters into elastic webs 1 ' and/or makes the part of elastic webs 1 ' constitute condition that fiber enters into non-elastic fiber net 2 ' preferably, the hot blast air quantity is 0.4～3m/ second, temperature is 80～160 ℃, travelling speed is 5～200m/ minute, and heat treatment time was 0.5～10 second.Preferred especially hot blast air quantity is 1～2m/ second.Above-mentioned condition also is preferred from making the viewpoint that enters equably behind the fiber softening and making the bonding viewpoint of fibers melt.And then, in order to make fiber interweaving, the hot blast air quantity can be set at 3～5m/ second, will blow pressure and be set at 0.1～0.3kg/cm
2The air permeability of elastic webs 1 ' is that it is unobstructed that hot blast becomes, and fiber is entered more equably, thereby be preferred more than the 8m/ (kPas), when more preferably 24m/ (kPas) is above.In addition, the melt bonded good and maximum intensity of fiber increases.And then can also prevent balling-up.
In hot blast is handled, preferably when the part formation fiber of non-elastic fiber net 2 ' entered into elastic webs 1 ', the formation fiber of the formation fiber of non-elastic fiber net 2 ' and/or the formation fiber of non-elastic fiber net 3 ' and elastic webs 1 ' was bonding at their intersection point place heat fusing.At this moment, preferably according to making the elastomer after hot blast is handled keep the condition of fibre morphology to carry out the hot blast processing.That is, the formation fiber of preferred elastic fiber net 1 ' can not become film shape or film-fibre structure because hot blast handles.And, bonding between the formation fiber of non-elastic fiber net 2 ' in hot blast is handled, same at intersection point place heat fusing, between the formation fiber of elastic webs 1 ' and bonding between the formation fiber of non-elastic fiber net 3 ' at intersection point place heat fusing.
Hot blast by the hot blast mode is handled, and can obtain the fibre sheet material 10B that 3 fiber webs form one.Fibre sheet material 10B is the bar-shape that has certain width and extend in one direction.Fibre sheet material 10B then is transported to extension section 300.In extension section 300, fibre sheet material 10B at first is transported in the weak engagement device 25.Weak engagement device 25 is made of the embossing device of metal system with metal knurling rolls 26 and relative configuration with it or resinous backing roll 27, disposes the protuberance that embossing is used on the circumferential surface of described knurling rolls 26 regularly.Implement heat embossing processing by 25 couples of fibre sheet material 10B of weak engagement device.Thus, obtained implementing the fibre sheet material 10A of embossing processing.In addition, utilizing weak engagement device 25 to carry out the heat embossing first being processed, since bonding and each layer fiber web is bonded with each other and forms one by the heat fusing that hot blast handling part 200 carried out, so the heat embossing processing that utilizes weak engagement device 25 to be carried out is not essential in the present invention.Want to make that the fibroreticulate joint of each layer is integrated becomes when reliable, it is effective utilizing weak engagement device 25 to carry out heat embossing processing.In addition, according to weak engagement device 25, except the fibroreticulate joint of each layer is integrated, can suppress the advantage of the balling-up of fibre sheet material 10A in addition.As fibre sheet material 10B being carried out the weak method that engages, except above-mentioned heat embossing processing, can also list calendering joint, vapour injection joint that ultrasonic wave engaged, utilized flat-roll.
Its processing conditions carries out for bonding the assisting of the heat fusing that is undertaken by hot blast handling part 200 by the heat embossing processing that weak engagement device 25 carries out, so can relatively relax.On the contrary, if the condition of heat embossing processing is too fierce, then the bulkiness of fibre sheet material 10A can suffer damage, and can cause the filming of fiber, thereby the feel and the gas permeability of the flexible nonwoven fabrics that finally obtains played reaction.Go out to send to set the line pressure of heat embossing processing and the heating-up temperature of knurling rolls from this viewpoint.
In the fibre sheet material 10A that obtains by heat embossing processing, as shown in Figure 4, has the junction surface 4 of a large amount of single independent dispersing point shapes.Junction surface 4 forms with the configuration pattern of rule.Junction surface 4 preferences as the flow direction (MD) of fibre sheet material 10A with and the both direction of orthogonal direction (CD) on form discontinuously.
The fibre sheet material 10A that has implemented heat embossing processing in weak engagement device 25 then is sent to stretching device 30.Extremely shown in Figure 5 as Fig. 2, fibre sheet material 10A is stretched it by stretching device 30 along the direction (CD) with carriage direction (MD) quadrature, wherein said stretching device 30 has a pair of concavo- convex roller 33,34 that alternately is formed with large- diameter portion 31,32 and minor diameter (not shown) on axis direction.
The structure of stretching device 30 is, the pivot branch of one or two concavo- convex roller 33,34 shifts one's position it up and down by known elevating mechanism, and both intervals can be regulated.As Fig. 1 and Fig. 5 (b) and (d), each concavo- convex roller 33,34 fits loosely between the large-diameter portion 32 of another concavo-convex roller 34 according to the large-diameter portion 31 of a concavo-convex roller 33, and the mode that the large-diameter portion 32 of another concavo-convex roller 34 fits loosely between the large-diameter portion 31 of a concavo-convex roller 33 is combined.Fibre sheet material 10A is nipped between two rollers 33,34 of this state, thus drawing of fiber sheet material 10A.
In this stretching process, as shown in Figure 4 and Figure 5, preferably make the position consistency of the large-diameter portion 31,32 of the position at the junction surface 4 on the width of fibre sheet material 10A and concavo-convex roller 33,34.Particularly, as shown in Figure 4, the junction surface that a plurality of junction surfaces 4 form along the linearly arrangement of MD is listed in and has formed multiple row (illustrate among Fig. 4 10 row) on the fibre sheet material 10A, in Fig. 4, for to be positioned at the junction surface row R of the leftmost side
1Beginning is from each junction surface row R of there every row
1In the junction surface 4 contained, the position of the large-diameter portion 31 of a concavo-convex roller 33 is arranged to consistent with it, for the 2nd junction surface row R from the left side
2Beginning is from each junction surface row R of there every row
2In the junction surface contained, be arranged to the position of the large-diameter portion 32 of another concavo-convex roller 34 consistent with it.Among Fig. 4, the scope shown in the symbol 31,32 be expression fibre sheet material 10A be in the state of being nipped between two concavo-convex rollers 33,34 this constantly, with the equitant scope of circumferential surface of the large-diameter portion 31,32 of each roller.
When fibre sheet material 10A passes through between two rollers 33,34 under the state of being nipped between the concavo- convex roller 33,34, as Fig. 5 (b) and (d), junction surface 4 is overlapping with the large- diameter portion 31,32 of any one concavo-convex roller, on the other hand, not and the zone between the overlapping large-diameter portion of large- diameter portion 31,32, the zone between the promptly above-mentioned junction surface row R is stretched energetically by broad ways.Therefore, can be between the destruction that prevents junction surface 4 and each layer fiber web peel off in, the part beyond the junction surface of drawing of fiber sheet material 10A effectively.In addition, by this stretching, non-elastic fiber net 2,3 extends fully, and the degree of freely stretching that makes non-elastic fiber net 2,3 hinder elastic webs 1 thus reduces greatly.Its result according to this manufacture method, can make effectively and has high scalability and the damaged and few good flexible nonwoven fabrics of outward appearance of balling-up.
For fear of bringing damage for fibre sheet material 10A, the preferred right and wrong of circumferential surface of the large- diameter portion 31,32 of concavo- convex roller 33,34 are sharp-pointed.For example, be preferably formed tabular surface into Rack as Fig. 5 (b) and (d).The width W of the front end face of large-diameter portion 31,32 (with reference to Fig. 5 (b)) is preferably 0.3～1mm, is preferably junction surface 4 0.7～2 times in the size of CD direction, is preferably 0.9～1.3 times especially.Thus, the fibre morphology of non-elastic fiber is not easy destroyed, can obtain high-intensity flexible nonwoven fabrics.
The spacing P of large-diameter portion (with reference to Fig. 5 (b)) is preferably 0.7～2.5mm.This spacing P is preferably junction surface 4 1.2～5 times in the size of CD direction, is preferably 2～3 times especially.Can obtain presenting the same outward appearance of cloth and the good flexible nonwoven fabrics of skin sense of touch thus.In addition, junction surface 4 is at the spacing of CD direction (adjacent junction surface row R on the CD direction
1Between the interval or on the CD direction adjacent junction surface row R
2Between the interval) be roughly 2 times of spacing P between the large-diameter portion so that the position relationship consistency, because fibre sheet material 10A is in the elongation of CD direction and the reason of necking (necking), if so in 1.6 times～2.4 times scope, then can make position consistency.
The extended state of fibre sheet material 10A on its width of sending from stretching device 30 is disengaged.Promptly extend and alleviated.Its result shows retractility among the fibre sheet material 10A, and this sheet material 10A shrinks along its width.Thus, obtain needed flexible nonwoven fabrics 10.In addition, when removing extended state, can remove extended state fully, also can in the limit of performance retractility, remove extended state down with the state that keeps extended state to a certain degree.
The present invention is not limited to above-mentioned embodiment.For example the flexible nonwoven fabrics 10 of above-mentioned embodiment is the form of stacked identical or different stiff in fact non-elastic fiber layer 2,3 on two faces of elastic fibrous layer 1, replacing this form, also can be the form of 2 layers of structure of stacked non-elastic fiber layer on a face of elastic fibrous layer.It perhaps also can be the form of the single layer structure that only constitutes by elastic fibrous layer.The details of the flexible nonwoven fabrics of the form of relevant above-mentioned individual layer or 2 layers of structure can suit to be suitable for the explanation that the flexible nonwoven fabrics 10 to the above-mentioned embodiment of 3-tier architecture carries out.In addition, when the flexible nonwoven fabrics with 2 layers of structure is used as the constituent material of absorbent commodity, especially for position that user's skin contacts the time,, preferably the non-elastic fiber course skin one side of wearer and used from skin sense of touch and the viewpoint that prevents to be clamminess etc.
In addition, in the above-described embodiment, elastic fibrous layer 1 and non-elastic fiber layer the 2, the 3rd engage with their whole face, but replace this mode, also can make elastic fibrous layer 1 and non-elastic fiber layer 2,3 local engagement.As method, can list heat embossing for example, ultrasonic wave embossed, the local jet net-spraying method of the permeable WEB of having used pattern-like, the local acupuncture method of having used the pin that is configured to pattern-like, local hot blast method etc. with elastic fibrous layer 1 and non-elastic fiber layer 2,3 local engagement.By said method, can make elastic fibrous layer 1 and non-elastic fiber layer 2,3 with pattern batch (-type) ground arbitrarily or banded the joint.Local engagement is compared with whole joint, and two fibrolaminar one senses and bond strength are relatively poor.But according to local engagement, because non-elastic fiber layer 2,3 floats partly from elastic fibrous layer 1, so can obtain third dimension and the flexible nonwoven fabrics of thickness is arranged.
In addition, when nonwoven fabric of the present invention be configuration non-elastic fiber layer and under the situation about constituting, the structure of elastic fibrous layer and non-elastic fiber layer is not limited to structure shown in Figure 1 at least one face at elastic fibrous layer.
In addition, in method shown in Figure 5, stretching is to carry out under not by the state of the minor diameter clamping of the large-diameter portion of a concavo-convex roller and another concavo-convex roller at fibre sheet material 10A, but interval is between the two narrowed down, under the state that fibre sheet material 10A is clipped between the two, stretch.That is, also can under the state that touches the end across fibre sheet material, stretch.In addition, stretching process also can use the spy to open the method for putting down in writing in the flat 6-133998 communique.
In addition, in above-mentioned manufacture method, be that fibre sheet material 10A is stretched along the CD direction, replace, also can stretch along the MD direction.
Embodiment
Below, by embodiment the present invention is described in further detail.But scope of the present invention is not subjected to the restriction of this embodiment.
Use device shown in Figure 2 to make flexible nonwoven fabrics shown in Figure 1.At first, be that 17 μ m, fibre length are staple fibre (core: PET, the sheath: PE) be supplied to carding machine, form the non-elastic fiber net 3 ' that is made of carding fiber net of 51mm with diameter.The mass area ratio of fiber web 3 ' is 10g/m
2Go up stacked elastic webs 1 ' at this non-elastic fiber net 3 '.
Adopt following method to form elastic webs 1 '.As the TPO elastic resin based on propylene, using propylene content is that 85 weight %, ethylene contents are the TPO elastomer of 15 weight %.This polyolefin elastomer is to use metallocene catalyst polymerisation to obtain.In addition, as other elastic resin different, use that styrene-content is that 15 weight %, weight average molecular weight are 100000 with above-mentioned elastic resin, MFR is the SEBS resin of 30g/10min (230 ℃, 2.16kg).Use different extruders to make above-mentioned resin fusion respectively, and with fusion resin from die head temperature is 290 ℃ spinning-nozzle, extrude, adopt and spin spray method shaped resilient fiber web 1 ' on WEB.Spinning-nozzle is a parallel type, and the composite fibre that is made of 2 kinds of above-mentioned resins is carried out spinning.The fibre diameter of elastomer is 25 μ m.The mass area ratio of fiber web 1 ' is 40g/m
2
Go up stacked by the non-elastic fiber net 2 ' that constitutes with above-mentioned same staple fibre in elastic webs 1 '.The mass area ratio of fiber web 2 ' is 10g/m
2
Above-mentioned 3 layers of fibroreticulate duplexer are imported in the heat-treating machines, blow hot blast and heat-treat with the hot blast mode.Heat treated condition is, the temperature on the WEB is 140 ℃, and the hot blast air quantity is 2m/ second, and blowing pressure is 10kPa, and the time of blowing was 15 seconds.Obtained the fibre sheet material 10B of 3 layers of fiber web formation one by this heat treatment.
Then fibre sheet material 10B is implemented heat embossing processing.Heat embossing processing uses the embossing device with the protruding roller of embossing and smooth metallic roll to carry out.As the protruding roller of embossing, use spacing to be the protruding roller of the point-like of the protuberance of 2mm as the spacing of 2mm, CD direction with a large amount of MD directions.The temperature of each roller is set at 120 ℃, and line pressure is set at 300N/cm.Obtain having formed the fibre sheet material 10A at junction surface with the pattern of rule by this heat embossing processing.
Form elastic webs 1 ' with following method.As the TPO elastic resin based on propylene, using propylene content is that 85 weight %, ethylene contents are the TPO elastomer of 15 weight %.This polyolefin elastomer is to use metallocene catalyst polymerisation to obtain.In addition, as other non-resilient resin different, use the acrylic resin (homopolymerization) of MFR as 60g/10min (230 ℃, 2.16kg) with above-mentioned elastic resin.Use different extruders to make above-mentioned resin fusion respectively, and with fusion resin from die head temperature is 290 ℃ spinning-nozzle, extrude, adopt and spin spray method shaped resilient fiber web 1 ' on WEB.Spinning-nozzle is arranged to have the nozzle of the shape of alternately extruding resin separately as shown in Figure 3, makes the blended fiber of 2 kinds of resins.TPO elastomer and polyacrylic weight ratio are set at 50/50.The fibre diameter of elastomer is 25 μ m.The fibre diameter of non-elastic fiber is 18 μ m.The mass area ratio of fiber web 1 ' is 40g/m
2
Above-mentioned fiber web is imported in the heat-treating machine, blow hot blast and heat-treat with the hot blast mode.Heat treated condition is, the temperature on the WEB is 140 ℃, and the hot blast air quantity is 2m/ second, and blowing pressure is 10kPa, and the time of blowing was 15 seconds.Obtained the fibre sheet material 10B of 2 kinds of fiber web formation one by this heat treatment.
Then fibre sheet material 10B is implemented heat embossing processing.Heat embossing processing uses the embossing device with the protruding roller of embossing and smooth metallic roll to carry out.As the protruding roller of embossing, use spacing to be the protruding roller of the point-like of the protuberance of 2mm as the spacing of 2mm, CD direction with a large amount of MD directions.The temperature of each roller is set at 130 ℃, and line pressure is set at 300N/cm.Obtain having formed the fibre sheet material 10A at junction surface with the pattern of rule by this heat embossing processing.
Comparative example 1
As elastic resin, use that styrene-content is 15%, weight average molecular weight is 100,000, MFR is 30 SEBS resin.Use this elastic resin shaped resilient fiber web under 290 ℃ die head temperature.The diameter of elastomer is 32 μ m.In addition, employing and embodiment 1 same method are made flexible nonwoven fabrics.
Estimate
The characteristic of the flexible nonwoven fabrics that is obtained by embodiment and comparative example is as shown in table 1 below.The assay method of each project in the table is as described below.
＜intensity, percentage elongation and residual deformation 〉
Be 50mm, be the print of the size cutting-out rectangle of 25mm along direction according to flexible direction with its quadrature along flexible nonwoven fabrics.Print is installed on the TENSILON RTC1210A of ORIENTEC company manufacturing.The chuck spacing is 25mm.Make the flexible direction elongation of print with 300mm/ minute speed, measure the load of this moment along nonwoven fabric.With the load of maximum point of this moment as maximum intensity.In addition, be B with print length setting at this moment, when original print length setting is A, in case (B-A)/and A} * 100 are maximum elongation rate (%).In addition, extend 100% cyclic test, obtain 100% o'clock intensity of elongation at 100% o'clock from the load of extending.Moreover, after the elongation 100%, make it get back to initial point with identical speed, measure the ratio of irrecoverable length this moment, be worth as residual deformation with this.
Zygosity between＜elastic fibrous layer and the non-elastic fiber layer 〉
Shelling the state that makes when peeling off between elastic fibrous layer and the non-elastic fiber layer with hand judges with following benchmark.Strip off simply: *, have a little resistance sense: △, interlayer can not peel off and a part stay another the layer on: zero, interlayer can not peel off and nearly all stay another the layer on: ◎.Judgement is undertaken by 3 people, if hold the same idea more than 2 people, then its suggestion is as result of determination, if 3 people hold different opinions respectively, then getting suggestion placed in the middle is result of determination.
Table 1
| |
|
Comparative example 1 | |||
| Elastic fibrous layer | Elastic resin | The resin kind | The TPO elastomer | The TPO elastomer | SEBS |
| Propylene content (weight %) | 85 | 85 | - | ||
| Styrene-content (weight %) | - | - | 15 | ||
| Density (g/cm 3) | 0.867 | 0.867 | 0.90 | ||
| Melting heat value A | 17 | 17 | 0 | ||
| Melting |
22 | 22 | 0 | ||
| MFR (g/10 minute) | 300 | 300 | 30 | ||
| Weight average molecular weight | 200,000 | 200,000 | 100,000 | ||
| Other elastic resin | The resin kind | SEBS | - | - | |
| Styrene-content (weight %) | 15 | - | - | ||
| MFRg (g/10 minute) | 30 | - | - | ||
| Weight average molecular weight | 100,000 | - | - | ||
| Non-resilient resin | The resin kind | - | Polypropylene | - | |
| MFR (g/10 minute) | - | 60 | - | ||
| Weight average molecular weight | - | 124,000 | - | ||
| The weight ratio of elastic resin and other elastic resin or non-resilient resin | 50/50 | 50/50 | - | ||
| Estimate | Maximum intensity (cN/25mm) | 250 | 450 | 150 | |
| Maximum elongation rate (%) | 230 | 250 | 230 | ||
| Extend 100% o'clock intensity (cN/25mm) | 85 | 95 | 45 | ||
| Residual deformation (%) | 10 | 13 | 10 | ||
| Zygosity between non-elastic fiber layer and the elastic fibrous layer | ◎ | ◎ 1) | ○ | ||
1) elastomer of elastic resin layer and the zygosity between the non-elastic fiber
Can judge from the result shown in the table 1, the not only maximum elongation rate of nonwoven fabric of embodiment and residual deformation have kept the high level with the nonwoven fabric equal extent of comparative example, and have the intensity higher than the nonwoven fabric of comparative example, and the zygosity between elastic fibrous layer and the non-elastic fiber layer is good.When the nonwoven fabric of embodiment is used for external coating and makes disposable diaper, this diaper has following characteristics, be skin soft-touch and gas permeability height, dress easily, so owing to be to tie tight with whole face to be not easy to stay the rubber vestige because can fully extend.
Use the resin shown in the table 2, employing and embodiment 1 same method obtain flexible nonwoven fabrics.The mass area ratio of elastic webs 1 ' is 30g/m
2
Embodiment 7
Use the resin shown in the table 2, employing and embodiment 7 same methods obtain flexible nonwoven fabrics.The mass area ratio of elastic webs 1 ' is 40g/m
2
Estimate
The flexible nonwoven fabrics that embodiment 3～7 is obtained carries out the evaluation same with embodiment 1.And then measure 50% o'clock intensity of elongation with following method.Its result is as shown in table 2.
50% o'clock intensity of＜elongation 〉
After measuring the intensity that flexible nonwoven fabrics extends at 100% o'clock with above-mentioned method, make the state that this nonwoven fabric shrinks becomes elongation 50%.With the intensity of this moment as 50% o'clock intensity of elongation.The intensity meaning technically of extending at 50% o'clock is as described below.When dressing diaper, make its withdrawal after usually the waistline portion of diaper being stretched out about 100%, roughly dress diaper under 50% the state in elongation.If therefore consider flexible nonwoven fabrics of the present invention is used for the situation of the waistline portion of diaper, the intensity of then extending at 50% o'clock is high more, and the diaper behind the wearing is not easy dislocation more and comes off.
Table 2
| Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | |||
| The elastic resin layer | Elastic resin | The resin kind | The TPO elastomer | The TPO elastomer | The TPO elastomer | The TPO elastomer | The TPO elastomer |
| PP content (weight %) | 87 | 87 | 88 | 88 | 88 | ||
| Density (g/cm 3) | 0.866 | 0.865 | 0.861 | 0.871 | 0.861 | ||
| Melting heat value A | 11 | 9.9 | 5.2 | 0 | 5.2 | ||
| Melting heat value B | 17 | 17 | 13 | 34 | 13 | ||
| MFR (g/10 minute) | 180 | 70 | 18 | 7 | 18 | ||
| Weight average molecular weight | 210,000 | 220,000 | 260,000 | 300,000 | 260,000 | ||
| Other elastic resin | The resin kind | SEBS | SEBS | SEBS | SEBS | - | |
| Styrene-content (weight %) | 15 | 15 | 15 | 15 | - | ||
| MFR (g/10 minute) | 30 | 30 | 30 | 30 | - | ||
| Weight average molecular weight | 100,000 | 100,000 | 100,000 | 100,000 | - | ||
| Non-resilient resin | The resin kind | - | - | - | - | Polypropylene | |
| MFR (g/10 minute) | - | - | - | - | 60 | ||
| Weight average molecular weight | - | - | - | - | 124,000 | ||
| The weight ratio of elastic resin and other elastic resin or non-resilient resin | 50/50 | 50/50 | 50/50 | 50/50 | 50/50 | ||
| Estimate | Maximum intensity (cN/25mm) | 190 | 190 | 180 | 185 | 420 | |
| Maximum elongation rate (%) | 220 | 250 | 260 | 230 | 250 | ||
| Extend 100% o'clock intensity (cN/25mm) | 48 | 51 | 41 | 100 | 50 | ||
| Extend 50% o'clock intensity (cN/25mm) | 14 | 16 | 13 | 10 | 13 | ||
| Residual deformation (%) | 9.5 | 10 | 9.5 | 10 | 13 | ||
| The fibre diameter of elastomer (μ m) | 20 | 20 | 21 | 30 | 25 | ||
| Zygosity between non-elastic fiber layer and the elastic fibrous layer | ◎ | ◎ | ◎ | ◎ | ◎1) | ||
1) elastomer of elastic resin layer and the zygosity between the non-elastic fiber
Can judge clearly that from the result shown in the table 2 the maximum elongation rate and the residual deformation of the flexible nonwoven fabrics of each embodiment are higher, and have high strength.In the flexible nonwoven fabrics of each embodiment, the flexible nonwoven fabrics of embodiment 4 is high especially in 50% o'clock intensity of elongation.
Such as above detailed description, flexible nonwoven fabrics of the present invention is compared with flexible nonwoven fabrics in the past, and expansion performance further improves. And hot strength improves. And then, the melt bonded property increase between ethylene octane copolymer and the non-elastic fiber layer. Its result, when stacked non-elastic fiber layer on elastic fibrous layer, the joint between two-layer becomes well, is not easy to occur splitting.
Claims (6)
1, a kind of flexible nonwoven fabrics, it has and comprises elastomer and other elastomer different with this elastomer or the elastic fibrous layer of non-elastic fiber, and described elastomer contains the TPO elastomer based on propylene; Propylene content in the described TPO elastomer is 80～90 weight %, and the elastomeric density of this TPO is 0.855～0.880g/cm
3
2, flexible nonwoven fabrics as claimed in claim 1, wherein, described TPO elastomer is to use metallocene catalyst to carry out polymerization and obtains.
3, flexible nonwoven fabrics as claimed in claim 1 or 2, wherein, the elastomeric melting heat value of described TPO A is 2～20mJ/mg, and melting heat value B is 12～24mJ/mg.
4, flexible nonwoven fabrics as claimed in claim 1 or 2, wherein, the elastomeric melt flow MFR of described TPO is 2～350g/10min.
5, flexible nonwoven fabrics as claimed in claim 1 or 2 wherein, contains the elastomeric elastomer of described TPO or only is made of described TPO elastomer, perhaps contains described TPO elastomer and other thermoplastic elastomer (TPE).
6, flexible nonwoven fabrics as claimed in claim 1 or 2, wherein, described elastic fibrous layer at least the one side on dispose stiff in fact non-elastic fiber layer.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP004190/2006 | 2006-01-11 | ||
| JP2006004190 | 2006-01-11 | ||
| JP2006331258A JP4753852B2 (en) | 2006-01-11 | 2006-12-08 | Elastic nonwoven fabric |
| JP331258/2006 | 2006-12-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN100999856A true CN100999856A (en) | 2007-07-18 |
| CN100999856B CN100999856B (en) | 2011-02-09 |
Family
ID=38490074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710002334 Expired - Fee Related CN100999856B (en) | 2006-01-11 | 2007-01-11 | Extensible non-woven cloth |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP4753852B2 (en) |
| CN (1) | CN100999856B (en) |
| TW (1) | TW200734501A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132241A (en) * | 2013-03-08 | 2013-06-05 | 晋江市兴泰无纺制品有限公司 | Super-soft SS (spunbond and spunbond) nonwoven fabric and production process thereof |
| CN103612451A (en) * | 2013-11-19 | 2014-03-05 | 常熟市一心无纺制品有限公司 | Tough non-woven fabric |
| CN107083620A (en) * | 2017-04-21 | 2017-08-22 | 浙江华晨非织造布有限公司 | For diaper, trousers pad, the elastic non-woven cloth of diaper manufacturing process |
| CN110528176A (en) * | 2019-08-23 | 2019-12-03 | 江苏工程职业技术学院 | Multilayered structure micro nanometer fiber is knitted fabric, spinning apparatus and its production method |
| CN112746390A (en) * | 2021-01-28 | 2021-05-04 | 广东春夏新材料科技股份有限公司 | Hot-air cloth for sanitary towel and preparation method thereof |
| CN114232218A (en) * | 2021-12-27 | 2022-03-25 | 江西省安秀实业发展有限公司 | Enveloping type elastic non-woven fabric and preparation device and preparation method thereof |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9498932B2 (en) | 2008-09-30 | 2016-11-22 | Exxonmobil Chemical Patents Inc. | Multi-layered meltblown composite and methods for making same |
| US8748693B2 (en) | 2009-02-27 | 2014-06-10 | Exxonmobil Chemical Patents Inc. | Multi-layer nonwoven in situ laminates and method of producing the same |
| US10161063B2 (en) | 2008-09-30 | 2018-12-25 | Exxonmobil Chemical Patents Inc. | Polyolefin-based elastic meltblown fabrics |
| US9168718B2 (en) | 2009-04-21 | 2015-10-27 | Exxonmobil Chemical Patents Inc. | Method for producing temperature resistant nonwovens |
| US8664129B2 (en) | 2008-11-14 | 2014-03-04 | Exxonmobil Chemical Patents Inc. | Extensible nonwoven facing layer for elastic multilayer fabrics |
| MX2012004390A (en) | 2009-10-21 | 2012-05-23 | 3M Innovative Properties Co | Porous supported articles and methods of making. |
| US8668975B2 (en) | 2009-11-24 | 2014-03-11 | Exxonmobil Chemical Patents Inc. | Fabric with discrete elastic and plastic regions and method for making same |
| JP5337688B2 (en) * | 2009-12-28 | 2013-11-06 | ユニ・チャーム株式会社 | Disposable diaper manufacturing method |
| BR112012022568A2 (en) * | 2010-03-12 | 2016-08-30 | Exxonmobil Chem Patents Inc | method for producing temperature resistant nonwovens |
| CN103603139B (en) * | 2013-12-12 | 2015-11-11 | 潍坊志和无纺布有限公司 | Heat bonding nonwoven fabric and preparation method thereof |
| CN104131415A (en) * | 2014-08-07 | 2014-11-05 | 瑞法诺(苏州)机械科技有限公司 | Composite hot air non-woven fabric manufacturing technology |
| CN113584636B (en) * | 2021-08-20 | 2023-03-21 | 广州凯滤佳无纺布有限公司 | Production process of PP (polypropylene) composite non-woven fabric |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3757530B2 (en) * | 1996-03-08 | 2006-03-22 | 三井化学株式会社 | Propylene polymer composition and molded body |
| JP3351266B2 (en) * | 1996-04-17 | 2002-11-25 | チッソ株式会社 | Low temperature adhesive fiber and nonwoven fabric using the same |
| CN1046977C (en) * | 1996-11-06 | 1999-12-01 | 优雅不织布工业股份有限公司 | Method for processing nonwoven fabrics by heat treatment and mechanic treatment |
| JP4155042B2 (en) * | 2002-02-20 | 2008-09-24 | チッソ株式会社 | Elastic long fiber nonwoven fabric and fiber product using the same |
| CN101423526B (en) * | 2003-03-28 | 2012-06-06 | 三井化学株式会社 | Propylene copolymer, polypropylene composition, use thereof, transition metal compounds, and catalysts for olefin polymerization |
| CA2545203C (en) * | 2003-11-14 | 2010-02-02 | Exxonmobil Chemical Patents Inc. | Transparent and translucent crosslinked propylene-based elastomers, and their production and use |
| JP4193686B2 (en) * | 2003-12-15 | 2008-12-10 | チッソ株式会社 | Elastic nonwoven fabric and textiles using the same |
| KR20070006931A (en) * | 2004-04-30 | 2007-01-11 | 다우 글로벌 테크놀로지스 인크. | Improved nonwoven fabric and fibers |
| WO2007024447A1 (en) * | 2005-08-19 | 2007-03-01 | Dow Global Technologies, Inc. | Propylene based meltblown nonwoven layers and composite structures |
| CN101316699A (en) * | 2005-10-26 | 2008-12-03 | 陶氏环球技术公司 | Multi-layer, pre-stretched elastic articles |
-
2006
- 2006-12-08 JP JP2006331258A patent/JP4753852B2/en active Active
-
2007
- 2007-01-04 TW TW096100343A patent/TW200734501A/en not_active IP Right Cessation
- 2007-01-11 CN CN 200710002334 patent/CN100999856B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103132241A (en) * | 2013-03-08 | 2013-06-05 | 晋江市兴泰无纺制品有限公司 | Super-soft SS (spunbond and spunbond) nonwoven fabric and production process thereof |
| CN103132241B (en) * | 2013-03-08 | 2017-05-31 | 晋江市兴泰无纺制品有限公司 | Super soft SS producing technology of non-woven fabrics |
| CN103612451A (en) * | 2013-11-19 | 2014-03-05 | 常熟市一心无纺制品有限公司 | Tough non-woven fabric |
| CN107083620A (en) * | 2017-04-21 | 2017-08-22 | 浙江华晨非织造布有限公司 | For diaper, trousers pad, the elastic non-woven cloth of diaper manufacturing process |
| CN110528176A (en) * | 2019-08-23 | 2019-12-03 | 江苏工程职业技术学院 | Multilayered structure micro nanometer fiber is knitted fabric, spinning apparatus and its production method |
| CN110528176B (en) * | 2019-08-23 | 2022-03-22 | 江苏工程职业技术学院 | Multilayer structure micro-nano fiber knitted fabric, spinning device and production method thereof |
| CN112746390A (en) * | 2021-01-28 | 2021-05-04 | 广东春夏新材料科技股份有限公司 | Hot-air cloth for sanitary towel and preparation method thereof |
| CN112746390B (en) * | 2021-01-28 | 2022-04-12 | 广东春夏新材料科技股份有限公司 | Hot-air cloth for sanitary towel and preparation method thereof |
| CN114232218A (en) * | 2021-12-27 | 2022-03-25 | 江西省安秀实业发展有限公司 | Enveloping type elastic non-woven fabric and preparation device and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100999856B (en) | 2011-02-09 |
| JP4753852B2 (en) | 2011-08-24 |
| TWI357450B (en) | 2012-02-01 |
| JP2007211386A (en) | 2007-08-23 |
| TW200734501A (en) | 2007-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100999856B (en) | Extensible non-woven cloth | |
| CN1962985B (en) | Telescopic nonwoven fabric | |
| CN101166859B (en) | Nonwoven stretch fabric and process for producing the same | |
| CN101454493B (en) | Stretch nonwoven fabric | |
| CN101074515B (en) | Telescopic nonwoven fabric | |
| US20070249253A1 (en) | Elastic laminate comprising elastic substrate between extensible webs and method for making | |
| JP4969157B2 (en) | Method for producing elastic nonwoven fabric | |
| JP5006654B2 (en) | Elastic nonwoven fabric | |
| EP0908549B1 (en) | Nonwoven fabric of long fibers and absorbent article made therefrom | |
| JP6120480B2 (en) | Diapers | |
| CN101925459A (en) | Elastic laminate and manufacture method thereof | |
| JP4969158B2 (en) | Method for producing elastic nonwoven fabric | |
| JP2002013056A (en) | Stretchable nonwoven fabric composite | |
| CN114450154A (en) | Laminated stretchable nonwoven fabric, sanitary material, and method for producing laminated stretchable nonwoven fabric | |
| KR20180056892A (en) | Spunbond nonwoven fabric having an improved functionality and manufacturing method thereof | |
| JP5230123B2 (en) | Elastic nonwoven fabric | |
| JP4753838B2 (en) | Elastic nonwoven fabric | |
| JP3816269B2 (en) | Elastic elastic net and composite elastic nonwoven fabric using the same | |
| TWI417432B (en) | Scalable nonwoven | |
| JP4352575B2 (en) | Thermoplastic composite nonwoven fabric and fiber product using the same | |
| JP4845573B2 (en) | Elastic nonwoven fabric | |
| JP5036221B2 (en) | Method for producing elastic nonwoven fabric | |
| JP3657053B2 (en) | Disposable diapers | |
| JP2000080553A (en) | Elastic composite nonwoven fabric | |
| JP2007321290A (en) | Stretchable nonwoven fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |