JP2022540633A - Nonwoven fabric of crimped conjugate fiber, laminate thereof, and article thereof - Google Patents
Nonwoven fabric of crimped conjugate fiber, laminate thereof, and article thereof Download PDFInfo
- Publication number
- JP2022540633A JP2022540633A JP2022501297A JP2022501297A JP2022540633A JP 2022540633 A JP2022540633 A JP 2022540633A JP 2022501297 A JP2022501297 A JP 2022501297A JP 2022501297 A JP2022501297 A JP 2022501297A JP 2022540633 A JP2022540633 A JP 2022540633A
- Authority
- JP
- Japan
- Prior art keywords
- propylene
- based polymer
- nonwoven fabric
- crimped
- conjugate fibers
- 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
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 99
- 239000000835 fiber Substances 0.000 title claims abstract description 75
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims abstract description 131
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims abstract description 131
- 229920000642 polymer Polymers 0.000 claims abstract description 127
- 229920001155 polypropylene Polymers 0.000 claims abstract description 19
- 238000002844 melting Methods 0.000 claims abstract description 12
- 230000008018 melting Effects 0.000 claims abstract description 12
- 238000005227 gel permeation chromatography Methods 0.000 claims abstract description 10
- 239000000155 melt Substances 0.000 claims abstract description 9
- 238000005259 measurement Methods 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000004049 embossing Methods 0.000 claims description 36
- 239000002131 composite material Substances 0.000 claims description 25
- 239000010410 layer Substances 0.000 claims description 14
- 229920001384 propylene homopolymer Polymers 0.000 claims description 13
- 239000002667 nucleating agent Substances 0.000 claims description 12
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 11
- 239000005977 Ethylene Substances 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- -1 propylene-ethylene-butylene Chemical group 0.000 claims description 11
- 238000002425 crystallisation Methods 0.000 claims description 7
- 230000008025 crystallization Effects 0.000 claims description 7
- 239000004902 Softening Agent Substances 0.000 claims description 6
- 229920001897 terpolymer Polymers 0.000 claims description 6
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 claims description 3
- 230000002745 absorbent Effects 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000004581 coalescence Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 14
- 239000004743 Polypropylene Substances 0.000 description 6
- 229920005604 random copolymer Polymers 0.000 description 6
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000000704 physical effect Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009987 spinning Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 3
- 238000002074 melt spinning Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- WXMKPNITSTVMEF-UHFFFAOYSA-M sodium benzoate Chemical compound [Na+].[O-]C(=O)C1=CC=CC=C1 WXMKPNITSTVMEF-UHFFFAOYSA-M 0.000 description 3
- 235000010234 sodium benzoate Nutrition 0.000 description 3
- 239000004299 sodium benzoate Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- HZVFRKSYUGFFEJ-YVECIDJPSA-N (2r,3r,4s,5r)-7-phenylhept-6-ene-1,2,3,4,5,6-hexol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=CC1=CC=CC=C1 HZVFRKSYUGFFEJ-YVECIDJPSA-N 0.000 description 2
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 208000010201 Exanthema Diseases 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 210000001217 buttock Anatomy 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 230000013872 defecation Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 201000005884 exanthem Diseases 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002685 polymerization catalyst Substances 0.000 description 2
- 239000008262 pumice Substances 0.000 description 2
- 206010037844 rash Diseases 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 210000002700 urine Anatomy 0.000 description 2
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 1
- HDUNAIVOFOKALD-RLCYQCIGSA-N (1s,2s)-1-[(4r)-2-(4-methylphenyl)-1,3-dioxolan-4-yl]-2-[(4s)-2-(4-methylphenyl)-1,3-dioxolan-4-yl]ethane-1,2-diol Chemical compound C1=CC(C)=CC=C1C1O[C@@H]([C@@H](O)[C@H](O)[C@H]2OC(OC2)C=2C=CC(C)=CC=2)CO1 HDUNAIVOFOKALD-RLCYQCIGSA-N 0.000 description 1
- AXCHZLOJGKSWLV-UHFFFAOYSA-N (4-phenylphenyl)methanol Chemical compound C1=CC(CO)=CC=C1C1=CC=CC=C1 AXCHZLOJGKSWLV-UHFFFAOYSA-N 0.000 description 1
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 1
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 description 1
- WZUNUACWCJJERC-UHFFFAOYSA-N 2,2-bis(hydroxymethyl)butyl octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CC)(CO)CO WZUNUACWCJJERC-UHFFFAOYSA-N 0.000 description 1
- ROHFBIREHKPELA-UHFFFAOYSA-N 2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]prop-2-enoic acid;methane Chemical compound C.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O.CC(C)(C)C1=CC(CC(=C)C(O)=O)=CC(C(C)(C)C)=C1O ROHFBIREHKPELA-UHFFFAOYSA-N 0.000 description 1
- KIHBGTRZFAVZRV-UHFFFAOYSA-N 2-hydroxyoctadecanoic acid Chemical compound CCCCCCCCCCCCCCCCC(O)C(O)=O KIHBGTRZFAVZRV-UHFFFAOYSA-N 0.000 description 1
- 125000004203 4-hydroxyphenyl group Chemical group [H]OC1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- NNJMFJSKMRYHSR-UHFFFAOYSA-N 4-phenylbenzoic acid Chemical compound C1=CC(C(=O)O)=CC=C1C1=CC=CC=C1 NNJMFJSKMRYHSR-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- FSEJJKIPRNUIFL-UHFFFAOYSA-N [2,2-bis(hydroxymethyl)-3-octadecanoyloxypropyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)COC(=O)CCCCCCCCCCCCCCCCC FSEJJKIPRNUIFL-UHFFFAOYSA-N 0.000 description 1
- FWCDLNRNBHJDQB-UHFFFAOYSA-N [2-(hydroxymethyl)-3-octadecanoyloxy-2-(octadecanoyloxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(COC(=O)CCCCCCCCCCCCCCCCC)COC(=O)CCCCCCCCCCCCCCCCC FWCDLNRNBHJDQB-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000010425 asbestos Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- IAQRGUVFOMOMEM-UHFFFAOYSA-N butene Natural products CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 1
- 150000005690 diesters Chemical class 0.000 description 1
- 235000019329 dioctyl sodium sulphosuccinate Nutrition 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 229960000878 docusate sodium Drugs 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000012968 metallocene catalyst Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- LYRFLYHAGKPMFH-UHFFFAOYSA-N octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(N)=O LYRFLYHAGKPMFH-UHFFFAOYSA-N 0.000 description 1
- UQDVHJGNIFVBLG-UHFFFAOYSA-N octadecanoic acid;propane-1,2,3-triol Chemical compound OCC(O)CO.CCCCCCCCCCCCCCCCCC(O)=O.CCCCCCCCCCCCCCCCCC(O)=O UQDVHJGNIFVBLG-UHFFFAOYSA-N 0.000 description 1
- FATBGEAMYMYZAF-KTKRTIGZSA-N oleamide Chemical compound CCCCCCCC\C=C/CCCCCCCC(N)=O FATBGEAMYMYZAF-KTKRTIGZSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- DOIRQSBPFJWKBE-UHFFFAOYSA-N phthalic acid di-n-butyl ester Natural products CCCCOC(=O)C1=CC=CC=C1C(=O)OCCCC DOIRQSBPFJWKBE-UHFFFAOYSA-N 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- APSBXTVYXVQYAB-UHFFFAOYSA-M sodium docusate Chemical compound [Na+].CCCCC(CC)COC(=O)CC(S([O-])(=O)=O)C(=O)OCC(CC)CCCC APSBXTVYXVQYAB-UHFFFAOYSA-M 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- KDYFGRWQOYBRFD-UHFFFAOYSA-L succinate(2-) Chemical compound [O-]C(=O)CCC([O-])=O KDYFGRWQOYBRFD-UHFFFAOYSA-L 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/005—Synthetic yarns or filaments
- D04H3/007—Addition polymers
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
- D04H3/05—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in another pattern, e.g. zig-zag, sinusoidal
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
- D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
- D04H3/14—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with bonds between thermoplastic yarns or filaments produced by welding
- D04H3/147—Composite yarns or filaments
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2509/00—Medical; Hygiene
- D10B2509/02—Bandages, dressings or absorbent pads
- D10B2509/026—Absorbent pads; Tampons; Laundry; Towels
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Nonwoven Fabrics (AREA)
- Multicomponent Fibers (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Laminated Bodies (AREA)
Abstract
巻縮型複合繊維の不織布、及びその積層体、並びにその物品に係り、該巻縮型複合繊維の不織布は、第１プロピレン系重合体と第２プロピレン系重合体とを含む巻縮型複合繊維の不織布であり、第１プロピレン系重合体及び第２プロピレン系重合体は、示差走査熱量計（ＤＳＣ）で測定される第２プロピレン系重合体の融点が、第１プロピレン系重合体の融点より３０℃以上高く、第１プロピレン系重合体と第２プロピレン系重合体との、ＡＳＴＭ Ｄ１２３８によって測定される溶融指数（ＭＦＲ：測定温度２３０℃、荷重２．１６ｋｇ）の比（第２プロピレン系重合体／第１プロピレン系重合体）が１．７以上であり、第１プロピレン系重合体と第２プロピレン系重合体との、ゲル透過クロマトグラフィ（ＧＰＣ）で測定した分子量分布（ＭＷＤ）の比（第２プロピレン系重合体／第１プロピレン系重合体）が１．５以上であり、第１プロピレン系重合体／第２プロピレン系重合体（重量比）で表示される成分比が、５０／５０～１０／９０である。A nonwoven fabric of crimped conjugate fibers, a laminate thereof, and an article thereof, wherein the nonwoven fabric of crimped conjugate fibers comprises a crimped conjugate fiber containing a first propylene-based polymer and a second propylene-based polymer The first propylene-based polymer and the second propylene-based polymer are such that the melting point of the second propylene-based polymer measured with a differential scanning calorimeter (DSC) is lower than the melting point of the first propylene-based polymer. 30 ° C. or higher, the ratio of the melt index (MFR: measurement temperature 230 ° C., load 2.16 kg) of the first propylene polymer and the second propylene polymer measured by ASTM D1238 (second propylene polymer coalescence/first propylene-based polymer) is 1.7 or more, and the ratio of molecular weight distribution (MWD) measured by gel permeation chromatography (GPC) between the first propylene-based polymer and the second propylene-based polymer ( Second propylene-based polymer/first propylene-based polymer) is 1.5 or more, and the component ratio represented by the first propylene-based polymer/second propylene-based polymer (weight ratio) is 50/50. ~10/90.
Description
本発明が解決しようとする課題は、巻縮型複合繊維の不織布、及びその積層体、並びにその物品に係り、さらに詳細には、ソフト性及びバルキー性が向上された巻縮型複合繊維の不織布、及びその積層体、並びにその物品に関する。 The problem to be solved by the present invention relates to a nonwoven fabric of crimped conjugate fibers, a laminate thereof, and articles thereof, and more particularly, a nonwoven fabric of crimped conjugate fibers with improved softness and bulkiness. , and laminates thereof, and articles thereof.
不織布は、ウェブの形成方法及び結合方法により、最終物性が決定されることになる。 The final physical properties of the nonwoven will be determined by how the web is formed and bonded.
既存のスパンボンド不織布の製造時、ウェブ形成は、単独紡糸または芯鞘型複合紡糸を介し、ウェブが形成されることになる。そのように形成されたウェブは、クリンプ（crimp）がない単純な構造を有することになり、加熱カレンダーによって結合され、薄い形態の不織布を形成することになる。 During the production of existing spunbond nonwoven fabrics, the web is formed through single spinning or core-sheath composite spinning. The web so formed will have a simple structure with no crimps and will be bonded by the heated calender to form a nonwoven in thin form.
薄い形態の不織布は、おむつの製造時、トップシート用及びバックシート用として使用されることになるが、カーディング（carding）でウェブを形成し、熱風で結合させた短繊維エアスルー不織布に比べ、バルキー性が顕著に低く、ソフト性が低下してしまうという問題点がある。 Nonwoven fabrics in thin form are used for top sheets and back sheets in the manufacture of diapers. There is a problem that the bulkiness is remarkably low and the softness is deteriorated.
また、ウェブの形成時、クリンプ付与がなされず、バルキー性が低下し、おむつの製造時、赤ちゃんの尻皮膚に直接当接する面積が大きく、不織布ラミネーティング時、ＡＤＬ層（acquisition distribution layer）との間に余裕空間がなく、排尿時、尿が一部トップシートに残り、赤ちゃんの尻をただれさせたり、発疹を誘発させたりする問題点がある。また、おむつの外部に尿漏れ（leakage）するという問題点もある。 In addition, when the web is formed, crimping is not applied, the bulkiness is reduced, the area that directly contacts the baby's buttocks skin is large during the production of the diaper, and the ADL layer (acquisition distribution layer) is formed during the lamination of the nonwoven fabric. There is no space between the top sheets, and some of the urine remains on the top sheet when urinating, causing problems such as sores on the baby's buttocks or rashes. In addition, there is also the problem of leakage of urine to the outside of the diaper.
本発明の一具現例は、ソフト性及びバルキー性が向上された巻縮型複合繊維の不織布を提供する。 An embodiment of the present invention provides a nonwoven fabric of crimped bicomponent fibers with improved softness and bulkiness.
本発明の他の具現例は、前記巻縮型複合繊維の不織布を２枚以上含む不織布積層体を提供する。 Another embodiment of the present invention provides a nonwoven fabric laminate comprising two or more nonwoven fabrics of the crimped conjugate fiber.
本発明のさらに他の具現例は、前記不織布積層体を含む物品を提供する。 Yet another embodiment of the present invention provides an article comprising the nonwoven laminate.
本発明の一側面は、
第１プロピレン系重合体と第２プロピレン系重合体とを含む巻縮型複合繊維の不織布であり、
前記第１プロピレン系重合体及び前記第２プロピレン系重合体は、示差走査熱量計（ＤＳＣ）で測定される前記第２プロピレン系重合体の融点が、前記第１プロピレン系重合体の融点より３０℃以上高く、前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ＡＳＴＭ Ｄ１２３８によって測定される溶融指数（ＭＦＲ：測定温度２３０℃、荷重２．１６ｋｇ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．７以上であり、前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ゲル透過クロマトグラフィ（ＧＰＣ）で測定した分子量分布（ＭＷＤ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．５以上であり、前記第１プロピレン系重合体／前記第２プロピレン系重合体（重量比）で表示される成分比が、５０／５０～１０／９０である巻縮型複合繊維不織布を提供する。
One aspect of the present invention is
A nonwoven fabric of crimped conjugate fibers containing a first propylene-based polymer and a second propylene-based polymer,
The first propylene-based polymer and the second propylene-based polymer are such that the melting point of the second propylene-based polymer measured by a differential scanning calorimeter (DSC) is 30 degrees higher than the melting point of the first propylene-based polymer. ° C. or higher, and the ratio of the melt indices (MFR: measurement temperature 230 ° C., load 2.16 kg) of the first propylene polymer and the second propylene polymer measured by ASTM D1238 (the second propylene based polymer/the first propylene-based polymer) is 1.7 or more, and the molecular weight distribution of the first propylene-based polymer and the second propylene-based polymer measured by gel permeation chromatography (GPC) ( MWD) ratio (the second propylene-based polymer/the first propylene-based polymer) is 1.5 or more, and is expressed as the first propylene-based polymer/the second propylene-based polymer (weight ratio). A crimped composite fiber nonwoven fabric having a ratio of 50/50 to 10/90.
前記第１プロピレン系重合体は、主成分であるプロピレン系重合体成分以外に、１～５重量％の核剤をさらに含み、前記第１プロピレン系重合体の結晶化温度は、前記第２プロピレン系重合体の結晶化温度より１９℃以上高いものでもある。 The first propylene-based polymer further contains 1 to 5% by weight of a nucleating agent in addition to the propylene-based polymer component that is the main component, and the crystallization temperature of the first propylene-based polymer is the second propylene. It is also higher than the crystallization temperature of the system polymer by 19°C or more.
前記第１プロピレン系重合体は、プロピレン単独重合体を含み、前記第２プロピレン系重合体は、プロピレン単独重合体７０～９０重量部及びプロピレン・エチレン・ブチレン三元重合体１０～３０重量部を含み、前記プロピレン・エチレン・ブチレン三元重合体は、プロピレン９０～９５重量％、エチレン２．５～５．０重量％及びブテン１．５～５．０重量％を含んでもよい。 The first propylene-based polymer comprises a propylene homopolymer, and the second propylene-based polymer comprises 70 to 90 parts by weight of a propylene homopolymer and 10 to 30 parts by weight of a propylene/ethylene/butylene terpolymer. and the propylene-ethylene-butylene terpolymer may comprise 90-95 wt% propylene, 2.5-5.0 wt% ethylene and 1.5-5.0 wt% butene.
前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ＡＳＴＭ Ｄ１２３８によって測定される溶融指数（ＭＦＲ：測定温度２３０℃、荷重２．１６ｋｇ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．７以上であり、クリンプの個数が２９ｅａ／１０ｍｍ以下でもある。 The ratio of the melt index (MFR: measurement temperature 230°C, load 2.16 kg) of the first propylene-based polymer and the second propylene-based polymer measured by ASTM D1238 (the second propylene-based polymer/ The first propylene-based polymer) is 1.7 or more, and the number of crimps is 29 ea/10 mm or less.
前記第１プロピレン系重合体と前記第２プロピレン系重合体は、それぞれ互いに独立して、主成分であるプロピレン系重合体成分以外に、柔軟剤１～５重量％をさらに含み、silksoft性指数（coefficient of friction）が０．４５以下でもある。 Each of the first propylene-based polymer and the second propylene-based polymer independently of each other further contains 1 to 5% by weight of a softening agent in addition to the propylene-based polymer component as the main component, and has a silk softness index ( coefficient of friction) is 0.45 or less.
前記巻縮型複合繊維は、モノ型、芯鞘型、サイドバイサイド型またはサンドイッチ型の複合繊維でもある。 The crimped conjugate fibers are also mono-type, core-sheath-type, side-by-side-type or sandwich-type conjugate fibers.
前記巻縮型複合繊維不織布は、エンボシング部及び非エンボシング部を含み、前記エンボシング部は、オープンエンボシングタイプであり、同一であるか、あるいは異なる間隔で連続して配列された複数個の単位エンボシングパターン部を含んでもよい。 The crimped composite fiber nonwoven fabric includes an embossing part and a non-embossing part, and the embossing part is an open embossing type, and includes a plurality of unit embossings continuously arranged at the same or different intervals. It may also include a sing pattern portion.
前記単位エンボシングパターン部に含まれたそれぞれのエンボシングパターンは、面積が０．２～０．７ｍｍ２でもある。 Each embossing pattern included in the unit embossing pattern portion also has an area of 0.2 to 0.7 mm 2 .
前記巻縮型複合繊維不織布は、ボンディング率が１３％以下でもある。 The crimped composite fiber nonwoven fabric also has a bonding rate of 13% or less.
前記巻縮型複合繊維不織布は、スパンボンド不織布でもある。 The crimped composite fiber nonwoven fabric is also a spunbond nonwoven fabric.
本発明の他の側面は、
少なくとも２層以上の層構成を有する不織布積層体であり、そのうち少なくとも１層が、前記巻縮型複合繊維の不織布である不織布積層体を提供する。
Another aspect of the invention is
Provided is a nonwoven fabric laminate having a layer structure of at least two layers, at least one of which is a nonwoven fabric of the crimped conjugate fiber.
前記巻縮型複合繊維の不織布は、スパンボンド不織布であり、前記不織布積層体は、両表層のうち片面だけに、前記スパンボンド不織布が露出されるようにも構成される。 The nonwoven fabric of the crimped conjugate fiber is a spunbond nonwoven fabric, and the nonwoven fabric laminate is also configured such that the spunbond nonwoven fabric is exposed only on one side of both surface layers.
本発明のさらに他の側面は、
前記不織布積層体を含む物品を提供する。
Yet another aspect of the present invention is
An article is provided comprising the nonwoven laminate.
前記物品は、おむつ、吸収用品、排便用品、支持層（support layer）またはトップシート（top sheet）でもある。 Said article is also a diaper, an absorbent article, a defecation article, a support layer or a top sheet.
前記物品がおむつの場合、前記不織布積層体は、親水剤含浸量（ＯＰＵ）が０．７％以下において、前記おむつのトップシート層に適用されたとき、水の吸収速度が３ｓｅｃ以下でもある。 When the article is a diaper, the nonwoven laminate also has a water absorption rate of 3 seconds or less when applied to the topsheet layer of the diaper at a hydrophilic agent pick-up (OPU) of 0.7% or less.
本発明の一具現例による巻縮型複合繊維の不織布は、クリンプの形態が鮮明であり、形態安全性が良好であり、すぐれたソフト性及びバルキー性が向上されうる。 A nonwoven fabric of crimped conjugate fibers according to an embodiment of the present invention has a clear crimp shape, good shape stability, and excellent softness and bulkiness.
従って、前述の巻縮型複合繊維の不織布を含むおむつは、着用者の皮膚を傷つけたり、発疹を起こさせたりしないのである。 Therefore, the diaper containing the nonwoven fabric of crimped conjugate fibers does not damage the wearer's skin or cause rashes.
以下、本発明の一具現例による巻縮型複合繊維の不織布について詳細に説明する。
本発明の一具現例による巻縮型複合繊維（以下、簡単に「複合繊維」とする）の不織布は、第１プロピレン系重合体と第２プロピレン系重合体とを含む。
Hereinafter, a nonwoven fabric of crimped conjugate fibers according to an embodiment of the present invention will be described in detail.
A nonwoven fabric of crimped conjugate fibers (hereinafter simply referred to as "conjugate fibers") according to an embodiment of the present invention includes a first propylene-based polymer and a second propylene-based polymer.
前記第１プロピレン系重合体及び前記第２プロピレン系重合体は、（ｉ）示差走査熱量計（ＤＳＣ）で測定される前記第２プロピレン系重合体の融点が、前記第１プロピレン系重合体の融点より３０℃以上高く、（ｉｉ）前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ＡＳＴＭ Ｄ１２３８によって測定される溶融指数（ＭＦＲ：測定温度２３０℃、荷重２．１６ｋｇ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．７以上であり、（ｉｉｉ）前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ゲル透過クロマトグラフィ（ＧＰＣ）で測定した分子量分布（ＭＷＤ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．５以上であり、（ｉｖ）前記第１プロピレン系重合体／前記第２プロピレン系重合体（重量比）で表示される成分比が、５０／５０～１０／９０である。 In the first propylene-based polymer and the second propylene-based polymer, (i) the melting point of the second propylene-based polymer measured by a differential scanning calorimeter (DSC) is the same as that of the first propylene-based polymer. (ii) the melt index (MFR: measurement temperature 230°C, load 2.16 kg) measured by ASTM D1238 of the first propylene-based polymer and the second propylene-based polymer; (iii) gel permeation chromatography of the first propylene-based polymer and the second propylene-based polymer, wherein the ratio (the second propylene-based polymer/the first propylene-based polymer) is 1.7 or more; The molecular weight distribution (MWD) ratio (the second propylene polymer/the first propylene polymer) measured by (GPC) is 1.5 or more; The component ratio represented by the second propylene-based polymer (weight ratio) is 50/50 to 10/90.
前記分子量分布（ＭＷＤ：molecular weight distribution）は、ゲル透過クロマトグラフィ（ＧＰＣ）で測定した重量平均分子量（Ｍｗ）と数平均分子量（Ｍｎ）との比（Ｍｗ／Ｍｎ）を意味する。 The molecular weight distribution (MWD) means the ratio (Mw/Mn) between the weight average molecular weight (Mw) and the number average molecular weight (Mn) measured by gel permeation chromatography (GPC).
例えば、前記第１プロピレン系重合体の融点は、前記第２プロピレン系重合体の融点より３０℃～６０℃または３０℃～１００℃高いものでもある。 For example, the melting point of the first propylene-based polymer may be 30-60°C or 30-100°C higher than the melting point of the second propylene-based polymer.
例えば、前記溶融指数の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）は、１．７～２．０、１．７～３．０または１．７～４．０でもある。 For example, the melt index ratio (the second propylene-based polymer/the first propylene-based polymer) may be 1.7 to 2.0, 1.7 to 3.0, or 1.7 to 4.0. be.
前記第１プロピレン系重合体及び前記第２プロピレン系重合体が、前記条件（ｉ）～（ｉｖ）をいずれも充足することにより、前記複合繊維は、巻縮性を有することになり、該複合繊維で構成された不織布は、優秀なソフト性及びバルキー性を有することができる。 When the first propylene-based polymer and the second propylene-based polymer satisfy all of the conditions (i) to (iv), the composite fiber has crimpability. A nonwoven fabric composed of fibers can have excellent softness and bulkiness.
前記第１プロピレン系重合体及び前記第２プロピレン系重合体は、前記複合繊維の断面内において、実質的にそれぞれの領域を占めるように配列され、長手方向に沿って連続して伸長され、前記第１プロピレン系重合体及び前記第２プロピレン系重合体のうち少なくとも一成分は、前記複合繊維の長手方向に沿って連続し、周縁部表面の少なくとも一部を形成することができる。 The first propylene-based polymer and the second propylene-based polymer are arranged so as to substantially occupy respective regions in the cross section of the conjugate fiber, and are continuously elongated along the longitudinal direction, At least one of the first propylene-based polymer and the second propylene-based polymer may be continuous along the longitudinal direction of the composite fiber and form at least a portion of the surface of the peripheral portion.
優秀なソフト性及びバルキー性を有する複合繊維の不織布を得ることができるという点において、前記第１プロピレン系重合体は、プロピレン単独重合体を含み、前記第２プロピレン系重合体は、プロピレン単独重合体７０～９０重量部及びプロピレン・エチレン・ブチレン三元重合体１０～３０重量部を含み、前記プロピレン・エチレン・ブチレン三元重合体は、プロピレン９０～９５重量％、エチレン２．５～５．０重量％及びブテン１．５～５．０重量％を含んでもよい。 The first propylene-based polymer comprises a propylene homopolymer, and the second propylene-based polymer comprises a propylene homopolymer in that a nonwoven fabric of composite fibers having excellent softness and bulkiness can be obtained. 70-90 parts by weight of the coalescence and 10-30 parts by weight of a propylene-ethylene-butylene terpolymer, wherein the propylene-ethylene-butylene terpolymer comprises 90-95% by weight of propylene and 2.5-5.0 parts by weight of ethylene. It may contain 0% by weight and 1.5-5.0% by weight butenes.
前記第１プロピレン系重合体は、主成分であるプロピレン系重合体成分以外に、１～５重量％の核剤（nucleating agent）をさらに含み、それにより、前記第１プロピレン系重合体の結晶化温度は、前記第２プロピレン系重合体の結晶化温度より１９℃以上高いものでもある。 The first propylene-based polymer further includes 1 to 5% by weight of a nucleating agent in addition to the propylene-based polymer component, which is the main component, thereby crystallizing the first propylene-based polymer. The temperature is also 19° C. or more higher than the crystallization temperature of the second propylene-based polymer.
前記第１プロピレン系重合体の融点は、１２０～１７５℃の範囲でもあり、前記第２プロピレン系重合体の融点は、１１０～１５５℃の範囲でもある。また、前記２つの成分の融点差は、前述のように、３０℃以上、３０℃～６０℃または３０℃～１００℃の範囲でもある。 The melting point of the first propylene-based polymer is also in the range of 120-175°C, and the melting point of the second propylene-based polymer is also in the range of 110-155°C. Also, the difference in melting point between the two components is 30° C. or more, in the range of 30° C. to 60° C. or 30° C. to 100° C., as described above.
前記不織布は、前記第１プロピレン系重合体の紡糸によって形成された繊維７０～９０重量部、及び前記第１プロピレン系重合体の紡糸によって形成された繊維１０～３０重量部を含んでもよい。 The nonwoven fabric may comprise 70-90 parts by weight of fibers formed by spinning the first propylene-based polymer and 10-30 parts by weight of fibers formed by spinning the first propylene-based polymer.
前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ＡＳＴＭ Ｄ１２３８によって測定される溶融指数（ＭＦＲ：測定温度２３０℃、荷重２．１６ｋｇ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．７以上であり、それにより、前記巻縮型複合繊維不織布において、クリンプの個数が２９ｅａ／１０ｍｍ以下でもある。 The ratio of the melt index (MFR: measurement temperature 230°C, load 2.16 kg) of the first propylene-based polymer and the second propylene-based polymer measured by ASTM D1238 (the second propylene-based polymer/ The first propylene-based polymer) is 1.7 or more, whereby the number of crimps is 29 ea/10 mm or less in the crimped composite fiber nonwoven fabric.
前記第１プロピレン系重合体と前記第２プロピレン系重合体は、それぞれ互いに独立して、主成分であるプロピレン系重合体成分以外に、柔軟剤１～５重量％をさらに含み、silksoft性指数（coefficient of friction）が０．４５以下でもある。 Each of the first propylene-based polymer and the second propylene-based polymer independently of each other further contains 1 to 5% by weight of a softening agent in addition to the propylene-based polymer component as the main component, and has a silk softness index ( coefficient of friction) is 0.45 or less.
また、前記不織布は、柔軟剤１～５重量％をさらに含んでもよい。 Also, the nonwoven fabric may further contain 1 to 5% by weight of a softening agent.
前記柔軟剤は、炭素数５～２５の脂肪酸アミドを含んでもよい。 The softener may contain fatty acid amides having 5 to 25 carbon atoms.
前記脂肪酸アミドは、オレイン酸アミド、エルカアミド、ステアリン酸アミド、またはそれらの組み合わせを含んでもよい。 The fatty acid amide may include oleic acid amide, erucamide, stearic acid amide, or combinations thereof.
前記第１プロピレン系重合体及び前記第2プロピレン系重合体は、高立体規則性重合触媒を使用して製造することができる。 The first propylene-based polymer and the second propylene-based polymer can be produced using a highly stereoregular polymerization catalyst.
前記高立体規則性重合触媒は、ジエステル成分の触媒、スクシネート成分の触媒、メタロセン触媒、またはそれらの組み合わせを含んでもよい。 The highly stereoregular polymerization catalyst may comprise a diester component catalyst, a succinate component catalyst, a metallocene catalyst, or a combination thereof.
また、前記第１プロピレン系重合体が、主成分であるプロピレン系重合体成分以外に、前記核剤をさらに含むことにより、前記第１プロピレン系重合体の結晶化温度を上昇させ、前記第２プロピレン系重合体の再結晶化温度と差別化させることにより、クリンプ発現による不織布の厚みを改善させ、前記不織布のソフト性及びバルキー性をさらに向上させることができる。 In addition, since the first propylene-based polymer further contains the nucleating agent in addition to the propylene-based polymer component that is the main component, the crystallization temperature of the first propylene-based polymer is increased, and the second By differentiating the temperature from the recrystallization temperature of the propylene-based polymer, the thickness of the nonwoven fabric due to crimping can be improved, and the softness and bulkiness of the nonwoven fabric can be further improved.
前記核剤は、粒状添加剤、自家組み立て核剤、反応性核剤、またはそれらの組み合わせを含んでもよい。前記粒状添加剤は、ベンゾ酸ナトリウム、二酸化チタン、シリカ、ナノクレイ、ナトリウム塩、チタン酸カルシウム、金属酸化物、金属水酸化物、またはそれらの組み合わせを含んでもよい。前記自家組み立て核剤は、ビス（ｐ－メチルベンジリデン）ソルビトール、ジベンジリデンソルビトール、モノベンジリデンソルビトール（ＭＢＳ）、それらの誘導体、またはそれらの組み合わせを含んでもよい。前記反応性核剤は、金属塩、４－ビフェニルカルボキシル酸、４－ビフェニルメタノール、アジピン酸、またはそれらの組み合わせを含んでもよい。 The nucleating agent may comprise particulate additives, self-assembled nucleating agents, reactive nucleating agents, or combinations thereof. The particulate additive may comprise sodium benzoate, titanium dioxide, silica, nanoclays, sodium salts, calcium titanate, metal oxides, metal hydroxides, or combinations thereof. The self-assembling nucleating agent may comprise bis(p-methylbenzylidene) sorbitol, dibenzylidene sorbitol, monobenzylidene sorbitol (MBS), derivatives thereof, or combinations thereof. The reactive nucleating agent may include metal salts, 4-biphenylcarboxylic acid, 4-biphenylmethanol, adipic acid, or combinations thereof.
前記複合繊維を含む不織布は、特別な装置を使用せずに、通常の複合溶融紡糸法で得ることができるが、例えば、生産性にすぐれるスパンボンディング法によって製造されたスパンボンド不織布でもある。 The nonwoven fabric containing the conjugate fiber can be obtained by a normal conjugate melt spinning method without using a special device, but it is also a spunbonded nonwoven fabric manufactured by a spunbonding method with excellent productivity.
以下、スパンボンド不織布の製造方法について詳細に説明する。 A method for producing a spunbond nonwoven fabric will be described in detail below.
まず、複合繊維の一方領域を形成する前記第１プロピレン系重合体と、他方領域を形成する前記第２プロピレン系重合体とをそれぞれ別個に、押出機などで溶融し、所望する繊維構造を形成して吐出するように構成された複合紡糸ノズルを有する紡糸口金から各溶融物を吐出させ、複合張繊維を放出させる。 First, the first propylene-based polymer forming one region of the conjugate fiber and the second propylene-based polymer forming the other region are separately melted using an extruder or the like to form a desired fiber structure. Each melt is expelled from a spinneret having a composite spinneret configured to discharge the composite tension fibers in a continuous manner.
その後、前述の放出された長繊維を冷却用空気によって冷却し、また延伸用空気によって張力を加え、所定の纎度を有させ、そのまま捕集ベルト上で捕集し、所定厚に堆積させる。 After that, the discharged filaments are cooled by cooling air and tensioned by drawing air to have a predetermined density, collected as they are on a collecting belt, and deposited to a predetermined thickness.
その後、交絡処理として、ニードルパンチ、ウォータージェット、超音波のような手段を利用する方法、加熱エンボシングロールを利用するエンボシング加工する方法、または高温通気により、熱融着する方法によって後加工が進められる。 After that, as an entangling treatment, post-processing proceeds by a method using means such as needle punch, water jet, or ultrasonic waves, an embossing method using a heated embossing roll, or a method of heat sealing by high-temperature ventilation. be done.
本発明の一具現例においては、前記巻縮型複合繊維不織布は、エンボシング加工によって熱融着されて形成されたものでもある。 In an embodiment of the present invention, the crimped composite fiber nonwoven fabric is also formed by heat-sealing through embossing.
前記エンボシング加工は、ボンディング率（すなわち、エンボシング面積率）が１３％以下であり、非エンボシング単位面積が０．２ｍｍ２以上、例えば、０．２～０．７ｍｍ２の条件においても遂行される。ここで、非エンボシング単位面積とは、四方がエンボシング部で取り囲まれた最小単位の非エンボシング部において、エンボシングに内接する四角形の最大面積を意味する。その範囲の条件でもってエンボシング加工を行えば、必要な不織布強度を維持したまま、さらにバルキー性が高い不織布を得ることができる。 The embossing process is performed under the condition that the bonding rate (ie, the embossing area rate) is 13% or less and the non-embossing unit area is 0.2 mm 2 or more, for example, 0.2 to 0.7 mm 2 . Here, the non-embossing unit area means the maximum area of a quadrangle inscribed in the embossing in the minimum unit non-embossing part surrounded by the embossing part on all sides. If the embossing process is performed under the conditions within this range, it is possible to obtain a nonwoven fabric having higher bulkiness while maintaining the required nonwoven fabric strength.
ボンディング率及び非エンボシング単位面積は、エンボシングパターンを変更することによっても調節される。 The bonding rate and non-embossing unit area are also adjusted by changing the embossing pattern.
前記エンボシング加工の結果、前記巻縮型複合繊維不織布は、エンボシング部及び非エンボシング部を含み、前記エンボシング部は、オープンエンボシングタイプであり、同一であるか、あるいは異なる間隔で連続して配列された複数個の単位エンボシングパターン部を含んでもよい。 As a result of the embossing process, the crimped composite fiber nonwoven fabric includes an embossed portion and a non-embossed portion, and the embossed portions are of the open embossing type and are continuously arranged at the same or different intervals. It may also include a plurality of unit embossing pattern portions.
図１を参照すれば、本発明の一具現例による巻縮型複合繊維の不織布１０のエンボシングパターンを示す部分図である。図１を参照すれば、本発明の一具現例による巻縮型複合繊維の不織布１０は、エンボシング部１１及び非エンボシング部１２を含む。
Referring to FIG. 1, it is a partial view showing an embossing pattern of a crimped composite
図２は、本発明の他の具現例による巻縮型複合繊維の不織布２０のエンボシングパターンを示す部分図である。図２を参照すれば、本発明の他の具現例による巻縮型複合繊維の不織布２０は、エンボシング部２１及び非エンボシング部２２を含む。
FIG. 2 is a partial view showing an embossing pattern of a crimped composite
前記巻縮型複合繊維不織布の繊度及び基本重量は、用途によっても適切に選択されるが、通常纎度は、１．０～２．５デニール、例えば、０．７～２．０デニールであり、基本重量は、１５～１００ｇ／ｍ２、例えば、７～３０ｇ／ｍ２でもある。 The fineness and basic weight of the crimped composite fiber nonwoven fabric are appropriately selected depending on the application, but the fineness is usually 1.0 to 2.5 denier, for example, 0.7 to 2.0 denier. , the basis weight is also between 15 and 100 g/m 2 , such as between 7 and 30 g/m 2 .
また、前記単位エンボシングパターン部に含まれたそれぞれのエンボシングパターンは、面積が０．２～０．７ｍｍ２でもある。 Also, each embossing pattern included in the unit embossing pattern portion has an area of 0.2 to 0.7 mm 2 .
前記複合繊維は、前記第１プロピレン系重合体及び前記第２プロピレン系重合体以外に、本発明の目的を損傷させない範囲において、必要により、その他成分を含んでもよい。前記その他成分は、公知された耐熱安定剤、耐候安定剤、各種安定剤、帯電防止剤、アンチブロッキング剤、防曇剤（anticlouding agent）、充填剤、染料、顔料、天然油、合成油、ワックス、またはそれらの組み合わせを含んでもよい。 In addition to the first propylene-based polymer and the second propylene-based polymer, the conjugate fiber may, if necessary, contain other components as long as the object of the present invention is not impaired. The other ingredients include known heat stabilizers, weather stabilizers, various stabilizers, antistatic agents, antiblocking agents, anticlouding agents, fillers, dyes, pigments, natural oils, synthetic oils, and waxes. , or combinations thereof.
前記安定剤は、２，６－ジ－ｔ－ブチル－４－メチルフェノール（ＢＨＴ）のような老化防止剤；テトラキス［メチレン－３－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオネート］メタン、β－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオン酸アルキルエステル、２，２’－オキサミドビス［エチル－３－（３，５－ジ－ｔ－ブチル－４－ヒドロキシフェニル）プロピオネートのようなフェノール系酸化防止剤；ステアリン酸亜鉛、ステアリン酸カルシウム、１，２－ヒドロキシステアリン酸カルシウムのような脂肪酸金属塩；グリセリンモノステアレート、グリセリンジステアレート、ペンタエリスリトールモノステアレート、ペンタエリスリトールジステアレート、ペンタエリスリトールトリステアレートのような多価アルコール脂肪酸エステル；またはそれらの組み合わせを含んでもよい。 Said stabilizers include antioxidants such as 2,6-di-t-butyl-4-methylphenol (BHT); tetrakis[methylene-3-(3,5-di-t-butyl-4-hydroxyphenyl ) propionate]methane, β-(3,5-di-t-butyl-4-hydroxyphenyl)propionic acid alkyl ester, 2,2′-oxamide bis[ethyl-3-(3,5-di-t-butyl- phenolic antioxidants such as 4-hydroxyphenyl)propionate; fatty acid metal salts such as zinc stearate, calcium stearate, calcium 1,2-hydroxystearate; glycerin monostearate, glycerin distearate, pentaerythritol monostearate polyhydric alcohol fatty acid esters such as fatty acids, pentaerythritol distearate, pentaerythritol tristearate; or combinations thereof.
前記充填剤は、シリカ、珪藻土、アルミナ、酸化チタン、酸化マグネシウム、軽石粉、軽石バルーン、水酸化アルミニウム、水酸化マグネシウム、塩基性炭酸マグネシウム、白雲石、硫酸カルシウム、チタン酸カリウム、硫酸バリウム、亜硫酸カルシウム、滑石、クレイ、雲母、石綿、ケイ酸カルシウム、モンモリロナイト、ベントナイト、グラファイト、アルミニウム粉、硫化モリブデン、またはそれらの組み合わせを含んでもよい。 The fillers include silica, diatomaceous earth, alumina, titanium oxide, magnesium oxide, pumice powder, pumice balloon, aluminum hydroxide, magnesium hydroxide, basic magnesium carbonate, dolomite, calcium sulfate, potassium titanate, barium sulfate, and sulfite. It may include calcium, talc, clay, mica, asbestos, calcium silicate, montmorillonite, bentonite, graphite, aluminum powder, molybdenum sulfide, or combinations thereof.
前述のプロピレン系重合体、及び必要によって使用される前述のその他成分は、公知された方法を利用して混合することができる。 The propylene-based polymer described above and the other components described above, if necessary, can be mixed using a known method.
前記複合繊維は、モノ型（mono）、芯鞘型（core/sheath）、サイドバイサイド型（side-by-side）またはサンドイッチ型（sandwitch）の複合繊維でもある。 Said conjugate fibers may also be mono, core/sheath, side-by-side or sandwich conjugate fibers.
例えば、前記複合繊維は、厚み方向断面が、前記第１プロピレン系重合体によってなる第１断面、及び前記第２プロピレン系重合体によってなる第２断面を含むサイドバイサイド型複合繊維であり、前記第１断面は、前記第２断面よりも狭い。 For example, the conjugate fiber is a side-by-side type conjugate fiber whose thickness direction cross section includes a first cross section made of the first propylene polymer and a second cross section made of the second propylene polymer, and the first The cross section is narrower than the second cross section.
以下、本発明の一具現例による不織布積層体について詳細に説明する。 Hereinafter, a nonwoven fabric laminate according to an embodiment of the present invention will be described in detail.
本発明の一具現例による不織布積層体は、少なくとも２層以上の層構成を有する積層体であり、そのうち少なくとも１層が、前述の不織布でもある。 A nonwoven fabric laminate according to an embodiment of the present invention is a laminate having a layer structure of at least two layers, at least one of which is also the nonwoven fabric described above.
前記不織布積層体は、前述の不織布のうち、スパンボンド不織布を含んでもよい。 The nonwoven fabric laminate may include a spunbond nonwoven fabric among the nonwoven fabrics described above.
例えば、前記巻縮型複合繊維の不織布は、スパンボンド不織布であり、前記不織布積層体は、両表層（surface layer）のうち片面だけに、前記スパンボンド不織布が露出されるようにも構成される。 For example, the nonwoven fabric of crimped conjugate fibers is a spunbonded nonwoven fabric, and the nonwoven fabric laminate is also configured such that the spunbonded nonwoven fabric is exposed only on one side of both surface layers. .
また、前記不織布積層体は、前記スパンボンド不織布４枚が積層されてなるものでもあり、その場合、前記不織布積層体は、均一度（ＣＶ％）が３％以下でもある。本明細書において「均一度（ＣＶ％）」とは、不織布積層体を１ｍ２の大きさに切断し、３０個の試験片を作った後、前記３０個の試験片の重量偏差を、前記複数個の試験片の平均重量で割った値の百分率を意味する。 Further, the nonwoven fabric laminate is also obtained by laminating four spunbond nonwoven fabrics, and in this case, the nonwoven fabric laminate has a uniformity (CV%) of 3% or less. As used herein, "uniformity (CV%)" refers to cutting the nonwoven fabric laminate into a size of 1 m 2 , making 30 test pieces, and then measuring the weight deviation of the 30 test pieces. Means the percentage of the value divided by the average weight of a plurality of test specimens.
前記スパンボンド不織布４枚が積層されてなる前記不織布積層体は、厚みが０．０２ｍｍ以上であり、クリンプ数が１０個／１０ｍｍ以上であり、ボンディング率が１３％以下であり、前記不織布積層体のソフト性を示すＭＤ剛軟度（ＭＤ stiffness）が４０ｍｍ以下でもある。本明細書において「ＭＤ剛軟度」とは、不織布積層体の機械方向屈曲変形（すなわち、不織布積層体が反った程度）を意味する。 The nonwoven fabric laminate obtained by laminating four spunbond nonwoven fabrics has a thickness of 0.02 mm or more, a number of crimps of 10/10 mm or more, and a bonding rate of 13% or less. The MD stiffness, which indicates the softness of the product, is 40 mm or less. As used herein, "MD bending resistance" means the machine-direction flexural deformation of a nonwoven fabric laminate (that is, the degree to which the nonwoven fabric laminate warps).
以下、本発明の一具現例による物品について詳細に説明する。 Hereinafter, an article according to an embodiment of the present invention will be described in detail.
本発明の一具現例による物品は、前述の不織布積層体を含む。 An article according to one embodiment of the present invention includes the nonwoven laminate described above.
前記物品は、おむつ、吸収用品、排便用品、支持層（support layer）またはトップシート（top sheet）でもある。 Said article is also a diaper, an absorbent article, a defecation article, a support layer or a top sheet.
前記物品がおむつである場合、前記不織布積層体は、親水剤含浸量（ＯＰＵ：oil pick-up）が０．７％以下であり、前記おむつのトップシート層に適用されたとき、水の吸収速度が３ｓｅｃ以下でもある。 When the article is a diaper, the nonwoven laminate has an oil pick-up (OPU) of 0.7% or less and absorbs water when applied to the topsheet layer of the diaper. The speed is also 3 seconds or less.
前記親水剤含浸量（ＯＰＵ）は、下記数式１によっても計算される。
[数式１]
ＯＰＵ（％）＝（Ｗ１－Ｗ０）／Ｗ０Ｘ１００
The hydrophilic agent impregnation amount (OPU) is also calculated by Equation 1 below.
[Formula 1]
OPU (%) = (W1-W0)/W0X100
数式１で、Ｗ０は、親水剤を含まない不織布積層体の重さであり、Ｗ１は、親水剤を含む不織布積層体（固形分のみ）の重さである。また、前記数式１で、Ｗ１は、親水剤を含まない不織布積層体の重さと、前記親水剤において、固体成分だけの重さとを合算した数値である。前記親水剤としては、２．０～５．０重量％の濃度を有するエマルジョン形態の親水剤（Zschimmer、Lertisan ＨＤ ２０／３、ドクサートナトリウム（docusate sodium）含有物質）が使用されうる。
In Equation 1, W0 is the weight of the nonwoven fabric laminate containing no hydrophilic agent, and W1 is the weight of the nonwoven laminate containing the hydrophilic agent (solid content only). In Equation 1, W1 is the sum of the weight of the nonwoven fabric laminate containing no hydrophilic agent and the weight of only the solid components in the hydrophilic agent. As said hydrophilic agent, a hydrophilic agent in emulsion form (Zschimmer,
以下、実施例を介し、本発明についてさらに詳細に説明する。本実施例は、本発明についてさらに具体的に説明するためのものであり、本発明の範囲は、それら実施例に限定されるものではない。 Hereinafter, the present invention will be described in more detail through examples. The present examples are intended to describe the present invention more specifically, and the scope of the present invention is not limited to these examples.
実施例１～６及び比較例１～１０
エルカアミド柔軟剤または／及び核剤（ＭＢＴ、ＮＢ３０１０Ｃ、安息香酸ナトリウム含有物質）が添加された第１プロピレン系重合体（Ａ）（第１成分）、及びエルカアミド柔軟剤が添加された第２プロピレン系重合体（Ｂ）（第２成分）を使用し、スパンボンディング法によって複合溶融紡糸を実施し、図３の構成を有するサイドバイサイド型複合繊維１を捕集面上に堆積させ、図１に図示されたエンボシングパターンにより、上部温度１５５℃であり、下部温度が１５０℃に加熱されたカレンダーロールを使用してエンボシング加工し、巻縮型複合繊維を含む不織布を製造した。ここで、前記第１プロピレン系重合体（Ａ）に核剤（ＭＢＴ、ＮＢ３０１０Ｃ、安息香酸ナトリウム含有物質）を添加したのは、前記第１プロピレン系重合体（Ａ）の結晶化温度を、前記第２プロピレン系重合体（Ｂ）より１９℃高く付与するためのものである。ここで、前記第１プロピレン系重合体（Ａ）及び前記第２プロピレン系重合体（Ｂ）に、それぞれエルカアミド柔軟剤を添加したのは、不織布のsilksoft性を向上させるためのものである。前記第１プロピレン系重合体及び前記第２プロピレン系重合体（Ｂ）の種類、物性及び含量比、核剤の含量、エルカアミド柔軟剤の含量、並びにエンボシングパターンの特性を、下記表１に示した。下記表１において、ＭＦＲは、ＡＳＴＭ Ｄ１２３８により、温度２３０℃、荷重２．１６ｋｇの条件下で測定された溶融指数を意味する。
Examples 1-6 and Comparative Examples 1-10
A first propylene-based polymer (A) (first component) to which an erucamide softener or/and a nucleating agent (MBT, NB3010C, sodium benzoate-containing material) is added, and a second propylene-based polymer to which an erucamide softener is added Using the polymer (B) (second component), composite melt spinning is performed by a spunbonding method to deposit side-by-side type composite fibers 1 having the configuration shown in FIG. The embossing pattern was embossed using a calender roll with an upper temperature of 155°C and a lower temperature of 150°C to produce a nonwoven fabric containing crimped conjugate fibers. Here, the nucleating agent (MBT, NB3010C, sodium benzoate-containing substance) was added to the first propylene-based polymer (A) because the crystallization temperature of the first propylene-based polymer (A) This is for imparting a temperature higher than that of the second propylene-based polymer (B) by 19°C. The purpose of adding the erucamide softening agent to the first propylene polymer (A) and the second propylene polymer (B) is to improve the silksoftness of the nonwoven fabric. The types, physical properties and content ratios of the first propylene-based polymer and the second propylene-based polymer (B), the content of the nucleating agent, the content of the erucamide softening agent, and the characteristics of the embossing pattern are shown in Table 1 below. rice field. In Table 1 below, MFR means a melt index measured under conditions of a temperature of 230° C. and a load of 2.16 kg according to ASTM D1238.
前記表１で、ＰＡ１～ＰＡ７及びＰＢは、それぞれ下記のところを意味する。 In Table 1 above, PA1 to PA7 and PB respectively mean the following.
（１）ＰＡ１：プロピレン単独重合体（ＬＧ化学、Ｈ７７００）７０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＬＧ化学、Ｔ－７７００）３０重量％との混合物
（２）ＰＡ２：プロピレン単独重合体（ＬＧ化学、Ｈ７７００）６０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＥＸＸＯＮ、ＶＩＳＴＡＭＡＸＸ ７０２０）４０重量％との混合物
（３）ＰＡ３：プロピレン単独重合体（ＬＧ化学、Ｈ７７００）４０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＤＯＷ、ＶＥＲＳＩＦＹ ４２００）６０重量％との混合物
（４）ＰＡ４：プロピレン単独重合体（ＬＧ化学、Ｈ７７００）７０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＬＧ化学、Ｔ－７７００）３０重量％との混合物
（５）ＰＡ５：プロピレン単独重合体（ＬＧ化学、ＭＨ７７００）７０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＬＧ化学、Ｔ－７７００）３０重量％との混合物
（６）ＰＡ６：プロピレン単独重合体（ＬＧ化学、ＭＨ７７００）６０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＬＧ化学、Ｔ－７７００）４０重量％との混合物
（７）ＰＡ７：プロピレン単独重合体（ＬＧ化学、Ｈ７７００）７０重量％と、ポリプロピレンにエチレンが共重合されたエラストマー系ランダム共重合体（ＬＧ化学、Ｔ－７７００）３０重量％との混合物
（８）ＰＢ：プロピレン単独重合体（ＰＭＣ、Ｈ５６２Ｔ）
(1) PA1: A mixture of 70% by weight of a propylene homopolymer (LG Chem, H7700) and 30% by weight of an elastomeric random copolymer (LG Chem, T-7700) in which ethylene is copolymerized with polypropylene (2) ) PA2: A mixture of 60% by weight of a propylene homopolymer (LG Chemical, H7700) and 40% by weight of an elastomeric random copolymer (EXXON, VISTAMAXX 7020) in which ethylene is copolymerized with polypropylene (3) PA3: propylene A mixture of 40% by weight of a homopolymer (LG Chem, H7700) and 60% by weight of an elastomeric random copolymer (DOW, VERSIFY 4200) in which ethylene is copolymerized with polypropylene (4) PA4: Propylene homopolymer ( LG Chem, H7700) 70% by weight and a mixture of 30% by weight of an elastomeric random copolymer (LG Chem, T-7700) in which ethylene is copolymerized with polypropylene (5) PA5: Propylene homopolymer (LG Chem , MH7700) 70% by weight and a mixture of 30% by weight of an elastomeric random copolymer obtained by copolymerizing polypropylene with ethylene (LG Chem, T-7700) (6) PA6: Propylene homopolymer (LG Chem, MH7700 ) 60% by weight and 40% by weight of an elastomeric random copolymer (LG Chem, T-7700) in which ethylene is copolymerized with polypropylene (7) PA7: Propylene homopolymer (LG Chem, H7700) 70 (8) PB: Propylene homopolymer (PMC, H562T)
評価例：スパンボンド不織布の物性評価
前記実施例１～６及び比較例１～１０で製造されたそれぞれのスパンボンド不織布の物性を、下記のような方法で評価し、その結果を下記表２に示した。
Evaluation Example: Evaluation of Physical Properties of Spunbonded Nonwoven Fabrics The physical properties of the spunbonded nonwoven fabrics produced in Examples 1 to 6 and Comparative Examples 1 to 10 were evaluated by the following methods, and the results are shown in Table 2 below. Indicated.
(１) 単位面積当たり重さ（重量：ｇ／ｍ２）：ＡＳＴＭ Ｄ３７７６－１９８５によって測定した。
（２）引っ張り強度：引っ張り強伸度機（Instron）測定設備を利用し、ＫＳＫ ０５２０法により、試験片の幅５ｃｍ、間隔１０ｃｍ、引っ張り速度５００ｍｍ／ｍｉｎの条件で引っ張り試験を行い、最大引っ張り荷重を求めた。
（３）引っ張り伸度：前記（２）の方法で測定した最大伸長時の伸度を求めた。
（４）silksoft性指数（Ｃ．Ｏ．Ｆ：coefficient of friction）：静止している物体に力を加えれば、摩擦力は、物体の垂直方向の分力に比例するが、このとき、比例定数を静止摩擦係数と言い、該静止摩擦係数は、接触する物体状態と、接触面の状態とによって決定される。ＫＳＭ ３００９によって静止摩擦係数を測定した。
（５）厚み（ｍｍ）：ＫＳＫ ０５０６の方法によって測定した。
（６）クリンプ数：顕微鏡を利用し、１０ｍｍ範囲内のフィラメントクリンプの個数を直接測定した。
（７）紡糸性：溶融紡糸時、フィラメント揺れを肉眼で観察し、ポリマードリップ（drip）は、欠点検出器で検出した。
(1) Weight per unit area (weight: g/m 2 ): Measured according to ASTM D3776-1985.
(2) Tensile strength: Using a tensile strength machine (Instron) measuring equipment, a tensile test is performed according to the KSK 0520 method under the conditions of a test piece width of 5 cm, an interval of 10 cm, and a tensile speed of 500 mm / min, and the maximum tensile load. asked for
(3) Tensile elongation: The elongation at the maximum elongation measured by the method of (2) above was determined.
(4) coefficient of friction (C.O.F): If a force is applied to a stationary object, the frictional force is proportional to the force component in the vertical direction of the object. is called a static friction coefficient, which is determined by the state of the contacting object and the state of the contact surface. Static coefficient of friction was measured by KSM 3009.
(5) Thickness (mm): Measured by the KSK 0506 method.
(6) Number of crimps: Using a microscope, the number of filament crimps within a 10 mm range was directly measured.
(7) Spinnability: During melt spinning, filament shaking was observed with the naked eye, and polymer drip was detected with a defect detector.
前記表２を参照すれば、実施例１～６で製造された巻縮型複合繊維の不織布は、比較例１～１０で製造された巻縮型複合繊維の不織布対比で、厚みが厚く、silksoft性指数（Ｃ．Ｏ．Ｆ）が小さく、クリンプ数が多く、引っ張り強度（ＭＤ：machine direction）、引っ張り強度（ＣＤ：cross direction）、引っ張り伸度（ＭＤ：machine direction）、引っ張り伸度（ＣＤ：cross direction）及び紡糸性のようなその他物性は、すぐれているか、あるいは互いに類似していると分かった。 Referring to Table 2, the nonwoven fabrics of the crimped conjugate fibers produced in Examples 1 to 6 were thicker and silksoft than the nonwoven fabrics of the crimped conjugate fibers produced in Comparative Examples 1 to 10. The sex index (COF) is small, the number of crimps is large, the tensile strength (MD: machine direction), the tensile strength (CD: cross direction), the tensile elongation (MD: machine direction), the tensile elongation (CD : cross direction) and other physical properties such as spinnability were found to be excellent or similar to each other.
図４は、実施例４で製造された巻縮型複合繊維の不織布のエンボシングパターンを示す部分図である。 4 is a partial view showing an embossing pattern of a nonwoven fabric of crimped conjugate fibers produced in Example 4. FIG.
図４を参照すれば、実施例４で製造された巻縮型複合繊維の不織布は、約２０個／１０ｍｍのクリンプ数を有するということが分かった。 Referring to FIG. 4, it was found that the crimped conjugate fiber nonwoven fabric produced in Example 4 had a number of crimps of about 20/10 mm.
本発明は、図面及び実施例を参照して説明されたが、それらは、例示的なものに過ぎず、本技術分野の当業者であるならば、それらから、多様な変形、及び均等な他の具現例が可能であるという点を理解するであろう。従って、本発明の真の技術的保護範囲は、特許請求範囲の技術的思想によって定められるものである。
Although the present invention has been described with reference to the drawings and examples, which are illustrative only, it will be appreciated by those skilled in the art that various modifications and equivalent modifications may be made therefrom. It will be appreciated that implementations of are possible. Therefore, the true technical protection scope of the present invention is determined by the technical ideas of the claims.
Claims (15)
前記第１プロピレン系重合体及び前記第２プロピレン系重合体は、示差走査熱量計（ＤＳＣ）で測定される前記第２プロピレン系重合体の融点が、前記第１プロピレン系重合体の融点より３０℃以上高く、前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ＡＳＴＭ Ｄ１２３８によって測定される溶融指数（ＭＦＲ：測定温度２３０℃、荷重２．１６ｋｇ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．７以上であり、前記第１プロピレン系重合体と前記第２プロピレン系重合体との、ゲル透過クロマトグラフィ（ＧＰＣ）で測定した分子量分布（ＭＷＤ）の比（前記第２プロピレン系重合体／前記第１プロピレン系重合体）が１．５以上であり、前記第１プロピレン系重合体／前記第２プロピレン系重合体（重量比）で表示される成分比が、５０／５０～１０／９０である、巻縮型複合繊維の不織布。 A nonwoven fabric of crimped conjugate fibers containing a first propylene-based polymer and a second propylene-based polymer,
The first propylene-based polymer and the second propylene-based polymer are such that the melting point of the second propylene-based polymer measured by a differential scanning calorimeter (DSC) is 30 degrees higher than the melting point of the first propylene-based polymer. ° C. or higher, and the ratio of the melt indices (MFR: measurement temperature 230 ° C., load 2.16 kg) of the first propylene polymer and the second propylene polymer measured by ASTM D1238 (the second propylene based polymer/the first propylene-based polymer) is 1.7 or more, and the molecular weight distribution of the first propylene-based polymer and the second propylene-based polymer measured by gel permeation chromatography (GPC) ( MWD) ratio (the second propylene-based polymer/the first propylene-based polymer) is 1.5 or more, and is expressed as the first propylene-based polymer/the second propylene-based polymer (weight ratio). A nonwoven fabric of crimped conjugate fibers, wherein the ratio of the components to be mixed is 50/50 to 10/90.
When the article is a diaper, the nonwoven laminate has a hydrophilic agent pick-up (OPU) of 0.7% or less and a water absorption rate of 3 sec or less when applied to the topsheet layer of the diaper. 15. The article of claim 14, wherein a
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