WO2022154072A1 - 高い接着力を有するポリエステルバインダー繊維 - Google Patents
高い接着力を有するポリエステルバインダー繊維 Download PDFInfo
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- WO2022154072A1 WO2022154072A1 PCT/JP2022/001042 JP2022001042W WO2022154072A1 WO 2022154072 A1 WO2022154072 A1 WO 2022154072A1 JP 2022001042 W JP2022001042 W JP 2022001042W WO 2022154072 A1 WO2022154072 A1 WO 2022154072A1
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- Prior art keywords
- fiber
- polyester binder
- binder fiber
- polyester
- component ratio
- Prior art date
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- 239000000835 fiber Substances 0.000 title claims abstract description 235
- 229920000728 polyester Polymers 0.000 title claims abstract description 144
- 239000011230 binding agent Substances 0.000 title claims abstract description 132
- 239000000853 adhesive Substances 0.000 title description 8
- 230000001070 adhesive effect Effects 0.000 title description 8
- 238000002425 crystallisation Methods 0.000 claims abstract description 36
- 230000008025 crystallization Effects 0.000 claims abstract description 36
- 239000013078 crystal Substances 0.000 claims abstract description 31
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 238000000113 differential scanning calorimetry Methods 0.000 claims abstract description 13
- 238000005481 NMR spectroscopy Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 238000002844 melting Methods 0.000 claims abstract description 10
- 230000008018 melting Effects 0.000 claims abstract description 10
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- -1 polyethylene terephthalate Polymers 0.000 claims description 14
- 238000001938 differential scanning calorimetry curve Methods 0.000 claims description 10
- 229920000139 polyethylene terephthalate Polymers 0.000 claims description 9
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 9
- 230000006698 induction Effects 0.000 claims description 5
- 238000005304 joining Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 23
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 230000000116 mitigating effect Effects 0.000 abstract 1
- 229920001225 polyester resin Polymers 0.000 description 27
- 238000001816 cooling Methods 0.000 description 24
- 238000000034 method Methods 0.000 description 24
- 239000004645 polyester resin Substances 0.000 description 23
- 239000004745 nonwoven fabric Substances 0.000 description 18
- 229920005989 resin Polymers 0.000 description 17
- 239000011347 resin Substances 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 230000000704 physical effect Effects 0.000 description 8
- 238000009987 spinning Methods 0.000 description 8
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000004744 fabric Substances 0.000 description 4
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000004899 motility Effects 0.000 description 4
- 238000010998 test method Methods 0.000 description 4
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 150000002009 diols Chemical class 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QPFMBZIOSGYJDE-UHFFFAOYSA-N 1,1,2,2-tetrachloroethane Chemical compound ClC(Cl)C(Cl)Cl QPFMBZIOSGYJDE-UHFFFAOYSA-N 0.000 description 2
- 239000004697 Polyetherimide Substances 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- 125000003118 aryl group Chemical group 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012217 deletion Methods 0.000 description 2
- 230000037430 deletion Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- BDJRBEYXGGNYIS-UHFFFAOYSA-N nonanedioic acid Chemical compound OC(=O)CCCCCCCC(O)=O BDJRBEYXGGNYIS-UHFFFAOYSA-N 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920001601 polyetherimide Polymers 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-L terephthalate(2-) Chemical compound [O-]C(=O)C1=CC=C(C([O-])=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-L 0.000 description 2
- PUPZLCDOIYMWBV-UHFFFAOYSA-N (+/-)-1,3-Butanediol Chemical compound CC(O)CCO PUPZLCDOIYMWBV-UHFFFAOYSA-N 0.000 description 1
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical compound C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 1
- NEQFBGHQPUXOFH-UHFFFAOYSA-N 4-(4-carboxyphenyl)benzoic acid Chemical compound C1=CC(C(=O)O)=CC=C1C1=CC=C(C(O)=O)C=C1 NEQFBGHQPUXOFH-UHFFFAOYSA-N 0.000 description 1
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- ORLQHILJRHBSAY-UHFFFAOYSA-N [1-(hydroxymethyl)cyclohexyl]methanol Chemical compound OCC1(CO)CCCCC1 ORLQHILJRHBSAY-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006081 fluorescent whitening agent Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- RXOHFPCZGPKIRD-UHFFFAOYSA-N naphthalene-2,6-dicarboxylic acid Chemical compound C1=C(C(O)=O)C=CC2=CC(C(=O)O)=CC=C21 RXOHFPCZGPKIRD-UHFFFAOYSA-N 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920000874 polytetramethylene terephthalate Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/82—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from polyester amides or polyether amides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/78—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products
- D01F6/84—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolycondensation products from copolyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4326—Condensation or reaction polymers
- D04H1/435—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/542—Adhesive fibres
- D04H1/55—Polyesters
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
Definitions
- the present invention relates to a polyester binder fiber in which the formation of a crystal component is suppressed and the proportion of the binder component is improved.
- polyester binder fibers obtained by blending a modified resin with a polyester resin have attracted attention from the viewpoints of excellent physical properties such as mechanical properties, electrical properties, heat resistance, dimensional stability, and hydrophobicity, and cost advantage.
- Patent Document 1 International Publication No. 2015/152802 discloses a polyester binder fiber containing 0.1 to 5.0% by mass of a polymer such as polymethylmethacrylate and polyester.
- Patent Document 2 International Publication No. 2018/1239886 discloses a polyester binder fiber containing 0.1 to 5.0% by mass of an amorphous polyetherimide polymer and polyester.
- the adhesive strength of the polyester binder fiber has been improved by changing the properties of the polyester resin by blending the polyester resin with another resin as a modifying component. ..
- the polyester binder fiber can be obtained as it is from the general-purpose polyester resin used in the main fiber without blending the modifying component, the polyester binder fiber can be obtained without being restricted by the modifying component.
- an object of the present invention is to provide a polyester binder fiber capable of producing a high-strength fiber structure even when a general-purpose polyester resin is used.
- the inventors of the present invention control the spinning conditions and control the crystal component in the fiber even when a polyester resin in which the modified component is not blended is used.
- the polyester binder fiber whose ratio is suppressed to a specific range retains a crystallizable amorphous component in the fiber and can increase the amount of the binder component that contributes to adhesion, thus improving the adhesiveness. It has been found that a high-strength fiber structure can be produced by using such a polyester binder fiber, and the present invention has been completed.
- ⁇ H calculated from the following formula (1) is 30 J / g or less (preferably 25 J / g or less, more preferably 20 J / g or less, and further.
- a polyester binder fiber preferably 17 J / g or less).
- ⁇ H ⁇ Hm ⁇ Hc (1)
- ⁇ Hm the heat absorption amount for melting (J / g)
- ⁇ Hc the calorific value for crystallization (J / g).
- the ratio to the total (a 1 : (a 2 + a 3 )) is 98.0: 2.0 to 50.0: 50.0 (preferably 97.0: 3.0 to 60.0: 40.0, More preferably 96.0: 4.0 to 62.5: 37.5, even more preferably 90.0: 10.0 to 65.0: 35.0, even more preferably 87.0: 13.0 to Polyester binder fibers in the range of 67.5: 32.5, particularly preferably 85.0: 15.0-70.0: 30.0).
- M (t) a 1 exp (-0.5 (t / t 1 ) 2 ) + a 2 exp (-(1 / W) (t / t 2 ) W ) + a 3 exp (t / t 3 ) (2) )
- a 1 is the crystal component ratio
- a 2 is the constrained amorphous component ratio
- a 3 is the amorphous component ratio
- t 1 is the relaxation time of the crystal component
- t 2 is the relaxation time of the constrained amorphous component
- t 3 is.
- the relaxation time of the amorphous component, W is the Wibble coefficient.
- the total of the relaxation time t 2 of the constrained amorphous component and the relaxation time t 3 of the amorphous component is 0.26 to 1.0 ms (preferably 0.28 to 0 ms).
- a fiber structure comprising at least the polyester binder fiber and the main fiber according to any one of aspects 1 to 9, wherein the polyester binder fiber joins the main fiber.
- the main fibers can be joined with high adhesive strength, and a high-strength fiber structure can be produced.
- the polyester binder fiber according to the first aspect of the present invention has a ⁇ H of 30 J / g or less calculated from the following formula (1) in the DSC curve of the heating process obtained by differential scanning calorimetry (DSC). May be good.
- ⁇ H ⁇ Hm ⁇ Hc (1)
- ⁇ Hm the heat absorption amount for melting (J / g)
- ⁇ Hc the calorific value for crystallization (J / g).
- ⁇ Hc is the absolute value of the amount of heat at the crystallization peak of the DSC curve, and represents the amount of heat released with crystallization in the heating process in the DSC measurement.
- ⁇ Hm is an absolute value of the amount of heat at the melting peak of the DSC curve, and represents the amount of heat required to melt the crystals of the polyester binder fiber used for the DSC measurement and the crystals generated in the heating process. That is, ⁇ H indicated by their difference ( ⁇ Hm ⁇ Hc) represents the amount of heat required to melt the crystals of the polyester binder fibers used for DSC measurement.
- the amount of heat ⁇ Hc required for new crystallization during the temperature rise process of DSC measurement, the crystals already present in the polyester binder fiber, and the temperature rise process are described. Since the difference from the calorific value ⁇ Hm required to melt the newly generated crystals is small, the amount of crystals present in the polyester binder fiber is reduced and the proportion of amorphous components is increased.
- the amorphous component of the polyester resin is heated to a temperature higher than the crystallization temperature beyond the glass transition temperature, so that the motility of the molecule is increased and the wettability with the main fiber is increased. It is considered that it may function as a component exhibiting high adhesiveness because it can be crystallized in a wet state with the main fiber when it is cooled.
- the ⁇ H of the polyester binder fiber according to the first aspect of the present invention may be preferably 25 J / g or less, more preferably 20 J / g or less, still more preferably 17 J / g or less.
- the lower limit of ⁇ H may be, for example, 1 J / g or more, preferably 3 J / g or more, and more preferably 5 J / g, from the viewpoint of imparting the strength of the polyester binder fiber required for the manufacturing process of the fiber structure. It may be the above.
- the polyester binder fiber according to the first aspect of the present invention may have a melting heat absorption amount ⁇ Hm of 20 to 60 J / g, preferably 25 to 55 J / g, from the viewpoint of improving thermal adhesiveness. It may be preferably 30 to 50 J / g, and more preferably 30 to 45 J / g.
- the free induction decay (FID) signal of the spin-spin relaxation time T2 at 140 ° C. obtained by pulse nuclear magnetic resonance (NMR) measurement is expressed by the following equation (2).
- the crystal component ratio (a 1 ) the constrained amorphous component ratio (a 2 ) and the amorphous component ratio (a 3 ) calculated when fitting, the crystal component ratio (a 1 ) and the constrained amorphous component ratio
- the ratio (a 1 : (a 2 + a 3 )) to the total of (a 2 ) and the amorphous component ratio (a 3 ) is in the range of 98.0: 2.0 to 50.0: 50.0. May be good.
- M (t) a 1 exp (-0.5 (t / t 1 ) 2 ) + a 2 exp (-(1 / W) (t / t 2 ) W ) + a 3 exp (t / t 3 ) (2) )
- a 1 is the crystal component ratio
- a 2 is the constrained amorphous component ratio
- a 3 is the amorphous component ratio
- t 1 is the relaxation time of the crystal component
- t 2 is the relaxation time of the constrained amorphous component
- t 3 is.
- the relaxation time of the amorphous component, W is the Wibble coefficient.
- Pulse NMR is an analysis method that can detect the response signal to a pulse (free induction decay (FID) signal) and measure the relaxation time of 1H nuclei associated with molecular motility, and the motility differs depending on the component. If there is, it is possible to calculate each relaxation time and abundance ratio by separating each motor component. In the present invention, it is possible to separate and evaluate three components, a crystalline component, a constrained amorphous component, and an amorphous component, by fitting the FID signal of spin-spin relaxation time T 2 for polyester binder fibers to a specific formula. I found it.
- polyester binder fibers in which the ratio (a 1 : (a 2 + a 3 )) to the total of the component ratios (a 3 ) is in a specific range have a relatively large amount of amorphous components, so the main fibers are bonded with high adhesive strength. Can be made to.
- the polyester binder fiber according to the second aspect of the present invention is the sum of the crystal component ratio (a 1 ), the constrained amorphous component ratio (a 2 ) and the amorphous component ratio (a 3 ) from the viewpoint of improving the adhesive strength.
- the ratio with (a 1 : (a 2 + a 3 )) is preferably 97.0: 3.0 to 60.0: 40.0, more preferably 96.0: 4.0 to 62.5: 37. 5.5, more preferably 90.0: 10.0 to 65.0: 35.0, even more preferably 87.0: 13.0 to 67.5: 32.5, particularly preferably 85.0: 15. It may be in the range of 0.0 to 70.0: 30.0.
- the component ratio and relaxation time of each component of the polyester binder fiber are values measured by the method described in Examples described later.
- the polyester binder fiber according to the second aspect of the present invention has a relaxation time t 2 for a constrained amorphous component and a relaxation time t 3 for an amorphous component from the viewpoint of improving wettability based on the motility of the amorphous component.
- the total may be 0.26 to 1.0 ms, preferably 0.28 to 0.80 ms, more preferably 0.30 to 0.60 ms, still more preferably 0.32 to 0.55 ms, even more preferably. May be 0.40 to 0.50 ms.
- the polyester binder fiber of the present invention is composed of a polyester resin.
- the polyester resin is a polycondensate of a dicarboxylic acid and a diol
- examples of the dicarboxylic acid include terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4'-biphenyldicarboxylic acid and the like.
- examples thereof include aliphatic dicarboxylic acids such as aromatic dicarboxylic acid, azelaic acid, and sebacic acid
- examples of the diol include ethylene glycol, diethylene glycol, propylene glycol, 1,4-butanediol, polyethylene glycol, and polytetramethylene glycol.
- examples thereof include an aliphatic diol such as, an aromatic diol such as an ethylene oxide adduct of bisphenol A or bisphenol S, and an alicyclic diol such as cyclohexanedimethanol.
- polyester resin constituting the polyester binder fiber of the present invention a polyester resin containing an aromatic dicarboxylic acid as a main dicarboxylic acid component is preferable, and examples thereof include polyethylene terephthalate, polytetramethylene terephthalate, and polycyclohexanedimethylene terephthalate. Be done. These polyester-based resins may be copolymers obtained by copolymerizing another diol or another dicarboxylic acid such as isophthalic acid as the third component. Of these, polyethylene terephthalate is more preferable.
- the polyester binder fiber of the present invention may contain a thermoplastic resin such as polymethylmethacrylate, polystyrene, and polyetherimide as long as the effect of the present invention is not impaired, but the non-uniformity that may occur due to the resin blend may be contained. From the viewpoint of preventing, stably obtaining the fiber, and obtaining the fiber having high quality stability, it is preferable that the resin constituting the binder fiber is a polyester resin alone. Further, the polyester binder fiber of the present invention may contain a matting agent, a heat stabilizer, an ultraviolet absorber, an antistatic agent, an end terminator, a fluorescent whitening agent and the like, if necessary.
- a matting agent such as polymethylmethacrylate, polystyrene, and polyetherimide
- the resin component constituting the polyester binder fiber of the present invention may contain 95% by mass or more of the polyester resin, preferably 99% by mass or more, and more preferably 99.95% by mass or more. , More preferably 100% by mass may be contained.
- impurities unavoidably mixed in the polyester resin synthesis step, the polyester binder fiber manufacturing step, and the like may be regarded as a part of the polyester resin.
- the polyester binder fiber of the present invention may have an intrinsic viscosity of 0.4 to 1.1 dL / g, preferably 0.4 to 1.0 dL / g, and more preferably 0. It may be 4 to 0.9 dL / g, more preferably 0.4 to 0.8 dL / g.
- the polyester binder fiber of the present invention has a specific ⁇ H obtained by DSC measurement and / or a crystal component ratio (a 1 ), a constrained amorphous component ratio (a 2 ) and an amorphous component ratio (a) obtained by pulse NMR measurement. Although it may have a specific ratio of 3 ), it is preferably an undrawn fiber from the viewpoint of further suppressing crystallization and increasing the component that functions as a binder.
- the polyester binder fiber of the present invention may have a crystallization temperature of 100 to 250 ° C., preferably 105 to 220 ° C., from the viewpoint of improving the passability of the fiber structure through the manufacturing process and the physical properties of the obtained fiber structure. , More preferably 105-200 ° C.
- the crystallization temperature refers to the peak temperature of the crystallization peak observed in the DSC curve of the heating process obtained by DSC measurement.
- the crystallization temperature of the polyester binder fiber is a value measured by the method described in Examples described later.
- the polyester binder fiber of the present invention may have a single fiber fineness of 0.01 to 10 dtex, preferably 0.01, from the viewpoint of improving the passability of the fiber structure through the manufacturing process and the physical properties of the obtained fiber structure. It may be ⁇ 5.0 dtex, more preferably 0.01 to 2.0 dtex.
- the single fiber fineness of the polyester binder fiber used in the production of dry non-woven fabric is 0.1. It is preferably ⁇ 10 dtex.
- the fibers are not mechanically entangled and thread breakage is less likely to occur as compared with the production of dry non-woven fabric.
- the single fiber fineness of the polyester binder fiber used in the production is preferably 0.01 to 10 dtex. Further, the single fiber fineness of the polyester binder fiber used in the production of the knitted fabric is preferably 0.1 to 10 dtex.
- the polyester binder fiber of the present invention may be a short fiber depending on the type of fiber structure and the like, for example, the fiber length may be 0.5 to 50 mm, preferably 1 to 25 mm, and more preferably 2. It may be up to 15 mm.
- the fiber length in the above range is preferable from the viewpoint of improving physical properties such as passability through the manufacturing process and the strength of the obtained paper. Further, in the production of dry non-woven fabric using a card machine or the like, it is necessary for the web composed of fibers to continuously pass through the line without breaking in the traveling direction, so that the polyester binder used in the production of dry non-woven fabric is used.
- the fiber length of the fiber is preferably 10 to 50 mm, more preferably 15 to 50 mm, and even more preferably 20 to 50 mm. Further, other fibers (for example, polyester fibers having no crystallization peak in the DSC curve) and polyester binder fibers may be blended to form a knitted fabric and then heated.
- the fiber length of the polyester binder fiber used in the production of the knitted fabric is preferably 0.5 to 50 mm.
- the method for producing a polyester binder fiber of the present invention includes a spinning step of melt-spinning a resin material containing a polyester-based resin, and in the spinning step, the molten resin is discharged from a discharge hole of a nozzle to form a yarn, and the yarn thereof. Fiber can be obtained by taking over the strips.
- crystallization of the polyester resin in the fiber can be suppressed by controlling the polyester resin immediately after discharge so as not to be rapidly cooled. Specifically, the molten resin discharged from the discharge hole of the nozzle is quickly cooled and becomes a thread, but this thread (thread) is subjected to elongation stress to be taken up, and as it cools, it is cooled. Orientation crystallization proceeds.
- the stress applied to the yarn is reduced by minimizing the temperature change of the yarn at a position 30 cm below the nozzle from the discharge hole so as not to cause rapid cooling, and the orientation of the polyester resin. It is possible to obtain a polyester binder fiber in which crystallization is suppressed and the crystal component ratio is suppressed in a specific range.
- the temperature of the yarn at a position 30 cm below the nozzle in the vertical direction may be, for example, (T-165) ° C. or higher and T ° C. or lower, which is preferable.
- a method of adjusting the nozzle temperature, the nozzle diameter, the discharge amount, the take-up speed, the wind speed and temperature of the cooling air, etc. can be mentioned. Be done. It depends on the chip viscosity (intrinsic viscosity), melting point, desired fineness, etc. of the polyester resin contained in the resin material, but for example, the wind speed of the cooling air may be lowered (for example, the wind speed may be 0.1 to 2.5 m).
- the chip viscosity (intrinsic viscosity) of the polyester resin may be 0.4 to 1.1 dL / g, preferably 0.4 to 1.0 dL, from the viewpoint of improving spinnability and physical properties of the obtained fiber. It may be / g, more preferably 0.4 to 0.9 dL / g, and even more preferably 0.4 to 0.8 dL / g.
- the chip viscosity (intrinsic viscosity) is a value measured by the method described in Examples described later.
- the spinning speed may be 500 to 3000 m / min, preferably 600 to 2000 m / min, from the viewpoint of improving productivity and suppressing orientation crystallization. , More preferably 800 to 1500 m / min.
- the method for producing a polyester binder fiber of the present invention may include a drawing step of stretching the fiber obtained by the spinning step as long as the polyester binder fiber in which the crystal component ratio is suppressed in a specific range can be obtained. However, since crystallization generally proceeds in the stretching step, it is preferable not to include the stretching step.
- the polyester binder fiber of the present invention can be used to join the main fibers to form a fiber structure.
- the form of the fiber structure is not limited as long as it contains at least the polyester binder fiber and the main fiber, and various cloths such as non-woven fabric, woven fabric, and knitted fabric can be mentioned, but the non-woven fabric is preferable.
- the main fiber include polyester main fiber, but polyester main fiber and other main fibers may be included. For example, when producing a wet non-woven fabric, pulp, other main fibers for papermaking, and the like may be contained.
- the polyester-based fiber is a polyester fiber (stretched polyester fiber) in which an amorphous component is crystallized by being stretched, and is a polyester fiber having no crystallization temperature, that is, substantially no longer substantially.
- the polyester-based fiber may contain a polyester-based resin similar to the polyester-based resin constituting the polyester binder fiber as a main component from the viewpoint of improving the adhesive force to obtain a high-strength fiber structure.
- the fineness of the polyester-based fiber is preferably 0.01 to 20 dtex, more preferably 0.01 to 15 dtex, and further preferably 0, from the viewpoint of improving the passability of the fiber structure through the manufacturing process and the physical properties of the obtained fiber structure. It may be 0.01 to 10 dtex.
- the mass ratio (main fiber / polyester binder fiber) between the main fiber (including at least the polyester main fiber) constituting the fiber structure (for example, wet non-woven fabric) and the polyester binder fiber is 95 from the viewpoint of the physical properties of the fiber structure. It may be / 5 to 5/95, preferably 80/20 to 20/80, more preferably 75/25 to 25/75, still more preferably 70/30 to 30/70, and even more preferably 70 /. It may be 30 to 50/50.
- the basis weight and thickness of the fiber structure of the present invention can be adjusted according to the type and application.
- the basis weight may be 40 to 120 g / m 2 , preferably 50 to 100 g / m 2. It may be m 2 , more preferably 60 to 90 g / m 2 .
- the thickness may be 0.01 to 2 mm, preferably 0.03 to 1 mm, and more preferably 0.05 to 0.5 mm.
- the basis weight and the thickness are values measured by the methods described in Examples described later, respectively.
- the fiber structure of the present invention is preferably a wet non-woven fabric, and more preferably paper.
- the paper obtained by using the polyester binder fiber of the present invention has high strength, and the tensile strength (paper strength) of the paper varies depending on the thickness, but is, for example, about 0.1 to 0.2 mm. In this case, it may be 7.0 kg / 15 mm or more, preferably 8.0 kg / 15 mm or more, more preferably 9.0 kg / 15 mm or more, and the upper limit thereof is not particularly limited and is about 30 kg / 15 mm. It may be.
- the paper strength is a value measured by the method described in Examples described later.
- Such a fiber structure can be produced using polyester binder fibers by a known or conventional method.
- a dry non-woven fabric can be produced by forming a web without using water using a card machine or the like and then heating the web to bond the main fibers to each other.
- the polyester binder fiber is blended in an amount of 5 to 95% by mass with respect to the main fiber.
- the wet non-woven fabric can be obtained by forming the web using water in the manufacturing process, drying the web if necessary, and then heating the web so that the binder fibers join the fibers together.
- a specific method of forming a web using water in the manufacturing process a papermaking method in which fibers are dispersed in water to produce a paper-like web, or a paper making method in which a web is formed without using water and then water is added. Examples include a water flow entanglement method in which fibers in the web are entwined.
- the polyester binder fiber for paper making may be cut into a cut length of 0.5 to 50 mm, preferably a cut length of 2 to 15 mm after spinning and applied to a paper machine. If the cut length is too short, the bonding force for joining the main fibers tends to be insufficient, and if the cut length is too long, the fibers tend to be entangled with each other and the dispersibility in water tends to deteriorate.
- a papermaking method a known method can be used, for example, a circular net papermaking method, a short net papermaking method, or the like can be used.
- the web After forming the paper-like web, the web may be dried, or can be dried using a known device. Paper can be obtained by drying the web and then pressing it at a high temperature.
- the press treatment by heating at the crystallization temperature or higher and lower than the melting point of the polyester binder fiber, the polyester binder fiber can be crystallized while the main fiber is held together, and the main fiber can be bonded.
- the temperature in the press treatment may be, for example, 150 to 250 ° C., preferably 160 to 245 ° C., and more preferably 180 to 240 ° C.
- the time of the high temperature treatment in the press treatment may be 15 minutes or less, preferably 12 minutes or less, and more preferably 10 minutes or less.
- the polyester binder fiber having an amorphous component reaches a temperature equal to or higher than the crystallization temperature, so that the obtained paper can exhibit high paper strength. Since the amorphous component of the polyester binder fiber heated to the crystallization temperature or higher crystallizes, the polyester binder fiber no longer has a crystallization temperature, and the crystallization peak in the DSC curve disappears.
- Chip viscosity Intrinsic viscosity
- SS-600-L1 type manufactured by Shibayama Kagaku Kikai Seisakusho
- the chip viscosity (intrinsic viscosity) (dL / g) of the resin before spinning and the intrinsic viscosity (dL / g) of the obtained polyester binder fiber. g) was measured.
- a phenol / tetrachloroethane (volume ratio 1/1) mixed solvent at 30 ° C. was used as the measurement solvent.
- Nozzle discharge position A temperature measurement sensor (manufactured by Anritsu Keiki Co., Ltd.) was used, and the temperature was measured by contacting the sensor portion with the thread immediately after discharge (1 cm below the nozzle). 30 cm below the nozzle: Using a temperature measurement sensor (manufactured by Anritsu Meter Co., Ltd.), the temperature was measured by contacting the sensor with the thread at a position 30 cm below the nozzle.
- the single fiber fineness was measured according to 8.5.1 of JIS L 1015 "Chemical fiber staple test method".
- the basis weight (g / m 2 ) of the paper was measured according to the JIS P 8124 test method.
- the thickness (mm) of the paper was measured according to the JIS P 8118 test method.
- Paper strength (tensile strength) Paper strength (tensile strength) (kg / 15 mm) was measured according to the JIS P 8113 test method.
- Polyester terephthalate resin having a chip viscosity (natural viscosity) of 0.587 dL / g is supplied to a melt extruder to be melted, discharged from a spinning nozzle and spun (nozzle surface temperature 280 ° C.), and cooled air velocity under the nozzle. The mixture was cooled at 7 m / s and a cooling air temperature of 30 ° C. and taken up at 1320 m / min to obtain a polyester binder fiber having the physical characteristics shown in Table 1.
- Polyester binder fiber cut to 5 mm and polyester main fiber EP-053 manufactured by Kuraray Co., Ltd., single fiber fineness: 0.8 dtex, cut length: 5 mm
- main fiber / binder fiber 55/45 mass ratio
- Example 2 Using a polyethylene terephthalate resin having a chip viscosity (intrinsic viscosity) of 0.576 dL / g, cooling was performed under a nozzle at a cooling air velocity of 1.1 m / s and a cooling air temperature of 30 ° C. in the same manner as in Example 1. Polyester binder fibers were obtained. Table 1 shows the physical characteristics of the obtained polyester binder fiber. Further, the obtained polyester binder fiber was used to obtain paper in the same manner as in Example 1. Table 1 shows the results of evaluating the physical characteristics of the obtained paper.
- Example 3 Using a polyethylene terephthalate resin having a chip viscosity (intrinsic viscosity) of 0.576 dL / g, cooling was performed under a nozzle at a cooling air velocity of 1.4 m / s and a cooling air temperature of 30 ° C. in the same manner as in Example 1. Polyester binder fibers were obtained. Table 1 shows the physical characteristics of the obtained polyester binder fiber. Further, the obtained polyester binder fiber was used to obtain paper in the same manner as in Example 1. Table 1 shows the results of evaluating the physical characteristics of the obtained paper.
- Example 4 Using a polyethylene terephthalate resin having a chip viscosity (intrinsic viscosity) of 0.576 dL / g, cooling was performed under a nozzle at a cooling air velocity of 1.4 m / s and a cooling air temperature of 25 ° C. in the same manner as in Example 1. Polyester binder fibers were obtained. Table 1 shows the physical characteristics of the obtained polyester binder fiber. Further, the obtained polyester binder fiber was used to obtain paper in the same manner as in Example 1. Table 1 shows the results of evaluating the physical characteristics of the obtained paper.
- Example 5 Using a polyethylene terephthalate resin having a chip viscosity (intrinsic viscosity) of 0.576 dL / g, cooling was performed under a nozzle at a cooling air velocity of 2.0 m / s and a cooling air temperature of 25 ° C. in the same manner as in Example 1. Polyester binder fibers were obtained. Table 1 shows the physical characteristics of the obtained polyester binder fiber. Further, the obtained polyester binder fiber was used to obtain paper in the same manner as in Example 1. Table 1 shows the results of evaluating the physical characteristics of the obtained paper.
- Example 1 Using a polyethylene terephthalate resin having a chip viscosity (intrinsic viscosity) of 0.576 dL / g, cooling was performed under a nozzle at a cooling air velocity of 2.0 m / s and a cooling air temperature of 20 ° C. in the same manner as in Example 1. Polyester binder fibers were obtained. Table 1 shows the physical characteristics of the obtained polyester binder fiber. Further, the obtained polyester binder fiber was used to obtain paper in the same manner as in Example 1. Table 1 shows the results of evaluating the physical characteristics of the obtained paper.
- the polyester binder fiber of Comparative Example 1 has ⁇ H and a specific crystal component ratio (a 1 ), a constrained amorphous component ratio (a 2 ), and an amorphous component ratio (a 3 ). Paper obtained using such polyester binder fibers has low paper strength because it is not in a specific range.
- Example 1 the ratio of a specific ⁇ H, a specific crystal component ratio (a 1 ), a constrained amorphous component ratio (a 2 ), and an amorphous component ratio (a 3 ) by adjusting the production conditions.
- a polyester binder fiber having the above is obtained.
- the obtained paper had higher paper strength as compared with Comparative Example 1, and was able to exhibit high adhesive strength of the polyester binder fibers.
- the polyester binder fiber of the present invention is useful as a binder fiber for a fiber structure containing a main fiber (particularly, a polyester main fiber).
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Abstract
Description
〔態様1〕
示差走査熱量測定(DSC)によって得られる昇温過程のDSC曲線において、下記式(1)から算出されるΔHが30J/g以下(好ましくは25J/g以下、より好ましくは20J/g以下、さらに好ましくは17J/g以下)である、ポリエステルバインダー繊維。
ΔH=ΔHm-ΔHc (1)
式中、ΔHmは融解吸熱量(J/g)、ΔHcは結晶化発熱量(J/g)である。
〔態様2〕
パルス核磁気共鳴(NMR)測定によって得られる140℃におけるスピン-スピン緩和時間T2の自由誘導減衰(FID)信号を下記式(2)にフィッティングさせた場合に算出される結晶成分比(a1)、拘束非晶成分比(a2)及び非晶成分比(a3)において、結晶成分比(a1)と、拘束非晶成分比(a2)及び非晶成分比(a3)の合計との比(a1:(a2+a3))が98.0:2.0~50.0:50.0(好ましくは97.0:3.0~60.0:40.0、より好ましくは96.0:4.0~62.5:37.5、さらに好ましくは90.0:10.0~65.0:35.0、さらにより好ましくは87.0:13.0~67.5:32.5、特に好ましくは85.0:15.0~70.0:30.0)の範囲である、ポリエステルバインダー繊維。
M(t)=a1exp(-0.5(t/t1)2)+a2exp(-(1/W)(t/t2)W)+a3exp(t/t3) (2)
式中、a1は結晶成分比、a2は拘束非晶成分比、a3は非晶成分比、t1は結晶成分の緩和時間、t2は拘束非晶成分の緩和時間、t3は非晶成分の緩和時間、Wはワイブル係数である。
〔態様3〕
態様2に記載のポリエステルバインダー繊維であって、前記拘束非晶成分の緩和時間t2及び前記非晶成分の緩和時間t3の合計が0.26~1.0ms(好ましくは0.28~0.80ms、より好ましくは0.30~0.60ms、さらに好ましくは0.32~0.55ms、さらにより好ましくは0.40~0.50ms)である、ポリエステルバインダー繊維。
〔態様4〕
態様1~3のいずれか一態様に記載のポリエステルバインダー繊維であって、未延伸繊維である、ポリエステルバインダー繊維。
〔態様5〕
態様1~4のいずれか一態様に記載のポリエステルバインダー繊維であって、結晶化温度が100~250℃(好ましくは105~220℃、より好ましくは105~200℃)である、ポリエステルバインダー繊維。
〔態様6〕
態様1~5のいずれか一態様に記載のポリエステルバインダー繊維であって、ポリエチレンテレフタレートを含む、ポリエステルバインダー繊維。
〔態様7〕
態様1~6のいずれか一態様に記載のポリエステルバインダー繊維であって、固有粘度が0.4~1.1dL/g(好ましくは0.4~1.0dL/g、より好ましくは0.4~0.9dL/g、さらに好ましくは0.4~0.8dL/g)である、ポリエステルバインダー繊維。
〔態様8〕
態様1~7のいずれか一態様に記載のポリエステルバインダー繊維であって、単繊維繊度が0.01~10dtex(好ましくは0.01~5.0dtex、より好ましくは0.01~2.0dtex)である、ポリエステルバインダー繊維。
〔態様9〕
態様1~8のいずれか一態様に記載のポリエステルバインダー繊維であって、繊維長が0.5~50mm(好ましくは1~25mm、より好ましくは2~15mm)である、ポリエステルバインダー繊維。
〔態様10〕
態様1~9のいずれか一態様に記載のポリエステルバインダー繊維と主体繊維とを少なくとも含み、前記ポリエステルバインダー繊維が前記主体繊維を接合してなる、繊維構造体。
〔態様11〕
態様10に記載の繊維構造体であって、前記主体繊維が結晶化温度を有しないポリエステル繊維を含む、繊維構造体。
本発明の第一の態様に係るポリエステルバインダー繊維は、示差走査熱量測定(DSC)によって得られる昇温過程のDSC曲線において、下記式(1)から算出されるΔHが30J/g以下であってもよい。
ΔH=ΔHm-ΔHc (1)
式中、ΔHmは融解吸熱量(J/g)、ΔHcは結晶化発熱量(J/g)である。
M(t)=a1exp(-0.5(t/t1)2)+a2exp(-(1/W)(t/t2)W)+a3exp(t/t3) (2)
式中、a1は結晶成分比、a2は拘束非晶成分比、a3は非晶成分比、t1は結晶成分の緩和時間、t2は拘束非晶成分の緩和時間、t3は非晶成分の緩和時間、Wはワイブル係数である。
本発明では、吐出直後のポリエステル系樹脂が急冷しないように制御することにより、繊維中のポリエステル系樹脂の結晶化を抑制することができる。具体的には、ノズルの吐出孔から吐出された溶融樹脂は、速やかに冷却され、糸条物となるが、この糸条物(糸条)には引き取られるための伸長応力がかかり、冷却とともに配向結晶化が進行する。そこで、ノズルから吐出後に冷却する際に、急冷しないように吐出孔からノズル下30cmの位置における糸条の温度変化をできるだけ小さくすることによって、糸条にかかる応力を低減し、ポリエステル系樹脂の配向結晶化を抑制して、結晶成分比が特定の範囲で抑制されたポリエステルバインダー繊維を得ることができる。
本発明のポリエステルバインダー繊維は、主体繊維を接合して繊維構造体を作製するために使用することができる。繊維構造体は、ポリエステルバインダー繊維と主体繊維とを少なくとも含んでいればその形態は限定されず、不織布、織物、編物などの各種布類が挙げられるが、不織布が好ましい。主体繊維としては、ポリエステル主体繊維が挙げられるが、ポリエステル主体繊維と他の主体繊維を含んでいてもよい。例えば、湿式不織布を製造する場合、パルプ、他の抄紙用主体繊維等を含んでいてもよい。ここで、本発明において、ポリエステル主体繊維とは、延伸されることにより非晶成分が結晶化したポリエステル繊維(延伸ポリエステル繊維)であり、結晶化温度を有しないポリエステル繊維、すなわち、最早実質的に新たに結晶化することのないポリエステル繊維をいう。そのため、ポリエステル主体繊維は、示差走査熱量測定(DSC)によって得られる昇温過程のDSC曲線において結晶化ピークが観測されない。
具体的には、プレス処理での温度としては、例えば、150~250℃であってもよく、好ましくは160~245℃、より好ましくは180~240℃であってもよい。プレス処理での高温処理の時間は、15分以下であってもよく、好ましくは12分以下、より好ましくは10分以下であってもよい。プレス処理において、非晶成分を有するポリエステルバインダー繊維が結晶化温度以上の温度になることで、得られた紙は、高い紙力を発現することができる。なお、結晶化温度以上に加熱されたポリエステルバインダー繊維は、非晶成分が結晶化するため、最早結晶化温度を有さず、DSC曲線における結晶化ピークが消失する。
自動粘度測定装置(柴山科学器械製作所製SS-600-L1型)を使用し、紡糸前の樹脂のチップ粘度(固有粘度)(dL/g)及び得られたポリエステルバインダー繊維の固有粘度(dL/g)を測定した。測定溶媒は30℃のフェノール/テトラクロロエタン(体積比1/1)混合溶媒を使用した。
ノズル吐出位置:温度測定用センサー(安立計器株式会社製)を使用し、吐出直後(ノズル下1cm)の位置で糸条にセンサー部を接触させ温度測定した。
ノズル下30cm位置:温度測定用センサー(安立計器株式会社製)を使用し、ノズル下30cmの位置で糸条にセンサー部を接触させ温度測定した。
JIS L 1015「化学繊維ステープル試験方法」の8.5.1に準じて、単繊維繊度(dtex)を測定した。
測定試料としてポリエステルバインダー繊維を3~8mg秤量し、示差走査型熱量計(島津製作所製「DSC-60」)を用いて、窒素雰囲気下、10℃/分の昇温速度で、室温(25℃)から300℃の温度まで測定を行った。観測されたDSC曲線から、ポリエステル樹脂に由来する、昇温中の結晶化により起こる結晶化ピークにおける結晶化発熱量:ΔHc(J/g)と、結晶の融解により起こる融解ピークにおける融解吸熱量:ΔHm(J/g)を読み取り、下記式(1)に従ってΔHを算出した。
ΔH(J/g)=ΔHm(J/g)―ΔHc(J/g) (1)
また、昇温中の結晶化により起こる結晶化ピークのピーク温度:Tc(℃)を読み取った。
ポリエステルバインダー繊維から得たサンプル(100mg)をNMRチューブに投入し、140℃の恒温槽中に10分間浸漬し測定試料とした。この測定試料を、パルス核磁気共鳴装置(ブルカー・バイオスピン株式会社製「minispec mq20 WVT」)を用いて、1Hのスピン-スピン緩和時間T2を測定した。測定条件は以下の通りであった。
・パルス系列:Solid-Echo法(90x-τ-90y)
・RFパルス幅(Pw1):2.1μs
・パルス間隔(Pi1):1μs
・パルス繰り返し時間:4s
・測定温度:140℃
上記測定で得られた自由誘導減衰(FID)信号を、線形最小二乗法によって下記式(2)にフィッティングし、いずれも正の値である結晶成分比(a1)、拘束非晶成分比(a2)及び非晶成分比(a3)を求めた。また、同様に、下記式(2)のフィッティングの結果から、結晶成分の緩和時間(t1)、拘束非晶成分の緩和時間(t2)及び非晶成分の緩和時間(t3)を求めた。
M(t)=a1exp(-0.5(t/t1)2)+a2exp(-(1/W)(t/t2)W)+a3exp(t/t3) (2)
紙の目付(g/m2)をJIS P 8124試験法に準じて測定した。
紙の厚さ(mm)をJIS P 8118試験法に準じて測定した。
紙力(引張強さ)(kg/15mm)をJIS P 8113試験法に準じて測定した。
チップ粘度(固有粘度)が0.587dL/gであるポリエチレンテレフタレート樹脂を溶融押出機に供給し溶融し、紡糸ノズルから吐出して紡糸し(ノズル表面温度280℃)、ノズル下で冷却風速1.7m/s、冷却風温度30℃にて冷却し、1320m/minで引き取り、表1に示すような物性を有するポリエステルバインダー繊維を得た。
チップ粘度(固有粘度)が0.576dL/gであるポリエチレンテレフタレート樹脂を使用し、ノズル下で冷却風速1.1m/s、冷却風温度30℃で冷却した以外は実施例1と同様にして、ポリエステルバインダー繊維を得た。得られたポリエステルバインダー繊維の物性を表1に示す。また、得られたポリエステルバインダー繊維を用いて実施例1と同様にして紙を得た。得られた紙の物性を評価した結果を表1に示す。
チップ粘度(固有粘度)が0.576dL/gであるポリエチレンテレフタレート樹脂を使用し、ノズル下で冷却風速1.4m/s、冷却風温度30℃で冷却した以外は実施例1と同様にして、ポリエステルバインダー繊維を得た。得られたポリエステルバインダー繊維の物性を表1に示す。また、得られたポリエステルバインダー繊維を用いて実施例1と同様にして紙を得た。得られた紙の物性を評価した結果を表1に示す。
チップ粘度(固有粘度)が0.576dL/gであるポリエチレンテレフタレート樹脂を使用し、ノズル下で冷却風速1.4m/s、冷却風温度25℃で冷却した以外は実施例1と同様にして、ポリエステルバインダー繊維を得た。得られたポリエステルバインダー繊維の物性を表1に示す。また、得られたポリエステルバインダー繊維を用いて実施例1と同様にして紙を得た。得られた紙の物性を評価した結果を表1に示す。
チップ粘度(固有粘度)が0.576dL/gであるポリエチレンテレフタレート樹脂を使用し、ノズル下で冷却風速2.0m/s、冷却風温度25℃で冷却した以外は実施例1と同様にして、ポリエステルバインダー繊維を得た。得られたポリエステルバインダー繊維の物性を表1に示す。また、得られたポリエステルバインダー繊維を用いて実施例1と同様にして紙を得た。得られた紙の物性を評価した結果を表1に示す。
チップ粘度(固有粘度)が0.576dL/gであるポリエチレンテレフタレート樹脂を使用し、ノズル下で冷却風速2.0m/s、冷却風温度20℃で冷却した以外は実施例1と同様にして、ポリエステルバインダー繊維を得た。得られたポリエステルバインダー繊維の物性を表1に示す。また、得られたポリエステルバインダー繊維を用いて実施例1と同様にして紙を得た。得られた紙の物性を評価した結果を表1に示す。
Claims (11)
- 示差走査熱量測定(DSC)によって得られる昇温過程のDSC曲線において、下記式(1)から算出されるΔHが30J/g以下である、ポリエステルバインダー繊維。
ΔH=ΔHm-ΔHc (1)
式中、ΔHmは融解吸熱量(J/g)、ΔHcは結晶化発熱量(J/g)である。 - パルス核磁気共鳴(NMR)測定によって得られる140℃におけるスピン-スピン緩和時間T2の自由誘導減衰(FID)信号を下記式(2)にフィッティングさせた場合に算出される結晶成分比(a1)、拘束非晶成分比(a2)及び非晶成分比(a3)において、結晶成分比(a1)と、拘束非晶成分比(a2)及び非晶成分比(a3)の合計との比(a1:(a2+a3))が98.0:2.0~50.0:50.0の範囲である、ポリエステルバインダー繊維。
M(t)=a1exp(-0.5(t/t1)2)+a2exp(-(1/W)(t/t2)W)+a3exp(t/t3) (2)
式中、a1は結晶成分比、a2は拘束非晶成分比、a3は非晶成分比、t1は結晶成分の緩和時間、t2は拘束非晶成分の緩和時間、t3は非晶成分の緩和時間、Wはワイブル係数である。 - 請求項2に記載のポリエステルバインダー繊維であって、前記拘束非晶成分の緩和時間t2及び前記非晶成分の緩和時間t3の合計が0.26~1.0msである、ポリエステルバインダー繊維。
- 請求項1~3のいずれか一項に記載のポリエステルバインダー繊維であって、未延伸繊維である、ポリエステルバインダー繊維。
- 請求項1~4のいずれか一項に記載のポリエステルバインダー繊維であって、結晶化温度が100~250℃である、ポリエステルバインダー繊維。
- 請求項1~5のいずれか一項に記載のポリエステルバインダー繊維であって、ポリエチレンテレフタレートを含む、ポリエステルバインダー繊維。
- 請求項1~6のいずれか一項に記載のポリエステルバインダー繊維であって、固有粘度が0.4~1.1dL/gである、ポリエステルバインダー繊維。
- 請求項1~7のいずれか一項に記載のポリエステルバインダー繊維であって、単繊維繊度が0.01~10dtexである、ポリエステルバインダー繊維。
- 請求項1~8のいずれか一項に記載のポリエステルバインダー繊維であって、繊維長が0.5~50mmである、ポリエステルバインダー繊維。
- 請求項1~9のいずれか一項に記載のポリエステルバインダー繊維と主体繊維とを少なくとも含み、前記ポリエステルバインダー繊維が前記主体繊維を接合してなる、繊維構造体。
- 請求項10に記載の繊維構造体であって、前記主体繊維が結晶化温度を有しないポリエステル繊維を含む、繊維構造体。
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57133217A (en) * | 1981-02-03 | 1982-08-17 | Kuraray Co Ltd | Fiber consisting of copolyester |
JP2003089958A (ja) * | 2001-09-19 | 2003-03-28 | Teijin Ltd | 熱接着性ポリエステル短繊維 |
JP2007131777A (ja) * | 2005-11-11 | 2007-05-31 | Nippon Ester Co Ltd | ポリエステル樹脂組成物 |
WO2014021084A1 (ja) * | 2012-07-30 | 2014-02-06 | 株式会社クラレ | 耐熱性樹脂複合体およびその製造方法、ならびに耐熱性樹脂複合体用不織布 |
WO2015152082A1 (ja) | 2014-03-31 | 2015-10-08 | 株式会社クラレ | ポリエステルバインダー繊維 |
WO2018123986A1 (ja) | 2016-12-26 | 2018-07-05 | 株式会社クラレ | ポリエステルバインダー繊維 |
JP2018204153A (ja) * | 2017-06-07 | 2018-12-27 | 日本エステル株式会社 | ポリエステル系バインダー短繊維 |
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57133217A (en) * | 1981-02-03 | 1982-08-17 | Kuraray Co Ltd | Fiber consisting of copolyester |
JP2003089958A (ja) * | 2001-09-19 | 2003-03-28 | Teijin Ltd | 熱接着性ポリエステル短繊維 |
JP2007131777A (ja) * | 2005-11-11 | 2007-05-31 | Nippon Ester Co Ltd | ポリエステル樹脂組成物 |
WO2014021084A1 (ja) * | 2012-07-30 | 2014-02-06 | 株式会社クラレ | 耐熱性樹脂複合体およびその製造方法、ならびに耐熱性樹脂複合体用不織布 |
WO2015152082A1 (ja) | 2014-03-31 | 2015-10-08 | 株式会社クラレ | ポリエステルバインダー繊維 |
WO2018123986A1 (ja) | 2016-12-26 | 2018-07-05 | 株式会社クラレ | ポリエステルバインダー繊維 |
JP2018204153A (ja) * | 2017-06-07 | 2018-12-27 | 日本エステル株式会社 | ポリエステル系バインダー短繊維 |
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