EP0629720A2 - Spinning process for the preparation of high thermoweldability polyolefin fibers - Google Patents
Spinning process for the preparation of high thermoweldability polyolefin fibers Download PDFInfo
- Publication number
- EP0629720A2 EP0629720A2 EP94109406A EP94109406A EP0629720A2 EP 0629720 A2 EP0629720 A2 EP 0629720A2 EP 94109406 A EP94109406 A EP 94109406A EP 94109406 A EP94109406 A EP 94109406A EP 0629720 A2 EP0629720 A2 EP 0629720A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibers
- spinning
- ranges
- weight
- copolymers
- 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
- 239000000835 fiber Substances 0.000 title claims abstract description 100
- 229920000098 polyolefin Polymers 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000009987 spinning Methods 0.000 title claims description 53
- 238000000034 method Methods 0.000 claims description 39
- 229920001577 copolymer Polymers 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 19
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 17
- 239000005977 Ethylene Substances 0.000 claims description 17
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 15
- 239000004711 α-olefin Substances 0.000 claims description 15
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 12
- 229920001384 propylene homopolymer Polymers 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 150000001993 dienes Chemical class 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- 229920005606 polypropylene copolymer Polymers 0.000 claims description 5
- 239000002530 phenolic antioxidant Substances 0.000 claims description 4
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 claims description 4
- XRBCRPZXSCBRTK-UHFFFAOYSA-N phosphonous acid Chemical class OPO XRBCRPZXSCBRTK-UHFFFAOYSA-N 0.000 claims description 4
- 239000004745 nonwoven fabric Substances 0.000 abstract description 7
- -1 polypropylene Polymers 0.000 description 14
- 239000004743 Polypropylene Substances 0.000 description 13
- 229920001155 polypropylene Polymers 0.000 description 13
- 229920000642 polymer Polymers 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 9
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 6
- 239000008096 xylene Substances 0.000 description 6
- 229920005604 random copolymer Polymers 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- VNQNXQYZMPJLQX-UHFFFAOYSA-N 1,3,5-tris[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CN2C(N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C(=O)N(CC=3C=C(C(O)=C(C=3)C(C)(C)C)C(C)(C)C)C2=O)=O)=C1 VNQNXQYZMPJLQX-UHFFFAOYSA-N 0.000 description 3
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 3
- 238000003490 calendering Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 239000000320 mechanical mixture Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 2
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 2
- VSAWBBYYMBQKIK-UHFFFAOYSA-N 4-[[3,5-bis[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]-2,4,6-trimethylphenyl]methyl]-2,6-ditert-butylphenol Chemical compound CC1=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C(CC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)C(C)=C1CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 VSAWBBYYMBQKIK-UHFFFAOYSA-N 0.000 description 2
- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- XZMCDFZZKTWFGF-UHFFFAOYSA-N Cyanamide Chemical compound NC#N XZMCDFZZKTWFGF-UHFFFAOYSA-N 0.000 description 2
- OWYWGLHRNBIFJP-UHFFFAOYSA-N Ipazine Chemical compound CCN(CC)C1=NC(Cl)=NC(NC(C)C)=N1 OWYWGLHRNBIFJP-UHFFFAOYSA-N 0.000 description 2
- NQRYJNQNLNOLGT-UHFFFAOYSA-N Piperidine Chemical compound C1CCNCC1 NQRYJNQNLNOLGT-UHFFFAOYSA-N 0.000 description 2
- BEIOEBMXPVYLRY-UHFFFAOYSA-N [4-[4-bis(2,4-ditert-butylphenoxy)phosphanylphenyl]phenyl]-bis(2,4-ditert-butylphenoxy)phosphane Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(C=1C=CC(=CC=1)C=1C=CC(=CC=1)P(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C BEIOEBMXPVYLRY-UHFFFAOYSA-N 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
- 235000013539 calcium stearate Nutrition 0.000 description 2
- 239000008116 calcium stearate Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- ORECYURYFJYPKY-UHFFFAOYSA-N n,n'-bis(2,2,6,6-tetramethylpiperidin-4-yl)hexane-1,6-diamine;2,4,6-trichloro-1,3,5-triazine;2,4,4-trimethylpentan-2-amine Chemical compound CC(C)(C)CC(C)(C)N.ClC1=NC(Cl)=NC(Cl)=N1.C1C(C)(C)NC(C)(C)CC1NCCCCCCNC1CC(C)(C)NC(C)(C)C1 ORECYURYFJYPKY-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- PRBHEGAFLDMLAL-GQCTYLIASA-N (4e)-hexa-1,4-diene Chemical compound C\C=C\CC=C PRBHEGAFLDMLAL-GQCTYLIASA-N 0.000 description 1
- XYXJKPCGSGVSBO-UHFFFAOYSA-N 1,3,5-tris[(4-tert-butyl-3-hydroxy-2,6-dimethylphenyl)methyl]-1,3,5-triazinane-2,4,6-trione Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C)=C1CN1C(=O)N(CC=2C(=C(O)C(=CC=2C)C(C)(C)C)C)C(=O)N(CC=2C(=C(O)C(=CC=2C)C(C)(C)C)C)C1=O XYXJKPCGSGVSBO-UHFFFAOYSA-N 0.000 description 1
- PRBHEGAFLDMLAL-UHFFFAOYSA-N 1,5-Hexadiene Natural products CC=CCC=C PRBHEGAFLDMLAL-UHFFFAOYSA-N 0.000 description 1
- JLZIIHMTTRXXIN-UHFFFAOYSA-N 2-(2-hydroxy-4-methoxybenzoyl)benzoic acid Chemical compound OC1=CC(OC)=CC=C1C(=O)C1=CC=CC=C1C(O)=O JLZIIHMTTRXXIN-UHFFFAOYSA-N 0.000 description 1
- OSIOKOOENDLTOL-UHFFFAOYSA-N 2-ethylidenebicyclo[2.2.1]hept-3-ene Chemical compound C1CC2C(=CC)C=C1C2 OSIOKOOENDLTOL-UHFFFAOYSA-N 0.000 description 1
- AIBRSVLEQRWAEG-UHFFFAOYSA-N 3,9-bis(2,4-ditert-butylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP1OCC2(COP(OC=3C(=CC(=CC=3)C(C)(C)C)C(C)(C)C)OC2)CO1 AIBRSVLEQRWAEG-UHFFFAOYSA-N 0.000 description 1
- PZRWFKGUFWPFID-UHFFFAOYSA-N 3,9-dioctadecoxy-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane Chemical compound C1OP(OCCCCCCCCCCCCCCCCCC)OCC21COP(OCCCCCCCCCCCCCCCCCC)OC2 PZRWFKGUFWPFID-UHFFFAOYSA-N 0.000 description 1
- WPMYUUITDBHVQZ-UHFFFAOYSA-M 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=CC(CCC([O-])=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-M 0.000 description 1
- SWZOQAGVRGQLDV-UHFFFAOYSA-N 4-[2-(4-hydroxy-2,2,6,6-tetramethylpiperidin-1-yl)ethoxy]-4-oxobutanoic acid Chemical compound CC1(C)CC(O)CC(C)(C)N1CCOC(=O)CCC(O)=O SWZOQAGVRGQLDV-UHFFFAOYSA-N 0.000 description 1
- 238000012935 Averaging Methods 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000156978 Erebia Species 0.000 description 1
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
- FLPKSBDJMLUTEX-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) 2-butyl-2-[(3,5-ditert-butyl-4-hydroxyphenyl)methyl]propanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)(CCCC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 FLPKSBDJMLUTEX-UHFFFAOYSA-N 0.000 description 1
- RSOILICUEWXSLA-UHFFFAOYSA-N bis(1,2,2,6,6-pentamethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 RSOILICUEWXSLA-UHFFFAOYSA-N 0.000 description 1
- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- OOCILPYOPQKPJY-UHFFFAOYSA-N calcium;(3,5-ditert-butyl-4-hydroxyphenyl)methyl-ethoxyphosphinic acid Chemical compound [Ca].CCOP(O)(=O)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 OOCILPYOPQKPJY-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- PYGSKMBEVAICCR-UHFFFAOYSA-N hexa-1,5-diene Chemical compound C=CCCC=C PYGSKMBEVAICCR-UHFFFAOYSA-N 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000009916 joint effect Effects 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- TVMXDCGIABBOFY-UHFFFAOYSA-N n-Octanol Natural products CCCCCCCC TVMXDCGIABBOFY-UHFFFAOYSA-N 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 description 1
- UEZVMMHDMIWARA-UHFFFAOYSA-M phosphonate Chemical compound [O-]P(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-M 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 125000003386 piperidinyl group Chemical group 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- WGKLOLBTFWFKOD-UHFFFAOYSA-N tris(2-nonylphenyl) phosphite Chemical compound CCCCCCCCCC1=CC=CC=C1OP(OC=1C(=CC=CC=1)CCCCCCCCC)OC1=CC=CC=C1CCCCCCCCC WGKLOLBTFWFKOD-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- 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
- D04H1/544—Olefin series
-
- 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
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
-
- 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
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/30—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising olefins as the major constituent
-
- 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
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins
-
- 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
Definitions
- the present invention relates to a spinning process for the preparation of thermoweldable polyolefin fibers, in particular polypropylene based fibers, suitable for the preparation of nonwoven fabrics.
- Said nonwoven fabrics are particularly suitable for uses requiring considerable softness and tear resistance, as is the case with coverstock for diapers and sanitary wear, which are made from low count fibers, generally ranging from 0.2 to 5 dtex, or with also membranes, made from fibers having a count between 3 and 10 dtex.
- coverstock for diapers and sanitary wear which are made from low count fibers, generally ranging from 0.2 to 5 dtex, or with also membranes, made from fibers having a count between 3 and 10 dtex.
- the fundamental requirement of polyolefin fibers for nonwoven fabrics is that they must bond to each other by means of the joint action of temperature and pressure on which the hot calendering processes are based. This characteristic, called “thermoweldability", is not always present in polyolefin fibers, or at least not in the same degree. In fact basically thermoweldability depends on the type of polyolefin being span, the additives it contains, the type of process and the spinning conditions used.
- thermoweldable fibers obtained from the above mentioned stabilized polyolefin compositions by conventional spinning processes in particular processes for the production of staple fibers.
- the good levels of thermoweldability shown in the examples are due to the selection of the stabilizers.
- fibers having a count ranging from 1.9 to 2.2 dtex are prepared by using a typical "long-spinning" apparatus (characterized, among other things, by high fiber-winding speed) equipped with a die having holes with 0.4 mm diameter.
- the present invention provides a process for the preparation of thermoweldable fibers having preferably a count ranging from 0.2 to 10 dtex, more preferably from 0.5 to 3 dtex, where the dies used have a real or equivalent output diameter of the holes greater than or equal to 0.5 mm, particularly ranging from 0.5 to 2 mm, with the proviso that for fibers having a count greater than or equal to 4 dtex, the ratio of the said output hole diameter to the count is greater than or equal to 0.06 mm/dtex, preferably greater than or equal to 0.08 mm/dtex, more preferably greater than or equal to 0.1 mm/dtex.
- output diameter of the holes is the diameter of the holes at the outside surface of the die, i.e., on the front face of the die from which the fibers exit. Inside the thickness of the die, the diameter of the holes can be different from the diameter of the holes at the output.
- the “equivalent output diameter of the holes” refers to instances where the hole is not round, in which case, for the purpose of the present invention, one considers the diameter of the ideal circle having an area equal to the area of the output hole, which corresponds to the above mentioned equivalent diameter.
- the process of the present invention can be carried out by using both long-spinning and short-spinning apparatuses for the production of staple fibers, and spun-bonding apparatuses.
- Long-spinning apparatuses normally comprise a first spinning segment where the fibers are extruded and air-cooled in a quenching column. Subsequently, these fibers go to the finishing steps during which they are drawn, crimped-bulked and cut. Generally, the above mentioned finishing steps are carried out intermittently with respect to the spinning, in a specific section where the fiber rovings are gathered into one single roving having a total count ranging from 100 and 200 kilotex. Said roving is then sent to drawing, crimping-bulking and cutting apparatuses which operate in sequence at a spinning speed ranging from 100 to 200 m/min. In other types of long-spinning apparatuses the above mentioned finishing steps are carried out in sequence with the spinning step.
- the fibers go directly from the gathering to the drawing rollers, where they are drawn at a somewhat contained ratio (not greater than 1.5). Subsequently, they are gathered in rovings with a count of about 5 kilotex, then subjected to crimping-bulking and cutting at a speed comparable with that of the spinning.
- the long-spinning apparatuses allow for a better control of the process parameters compared to the control one has with the short-spinning apparatus.
- the process conditions which are generally adopted when using the long-spinning apparatuses are the following:
- the draw ratio be from 1.1 to 4.0.
- thermoweldability of staple fibers improves as the fibers gathering speed decreases.
- the process of the present invention is particularly advantageous when the short-spinning apparatuses are used, said apparatuses being characterized, among other things, by low fiber-gathering speeds (less than 500 m/min).
- short-spinning apparatuses allow for a continuous operation, since the spinning speed is compatible with the drawing, crimping and cutting speeds, and due to their simplicity and reduced overall volume, these apparatuses are more economical than the long-spinning ones and suited for small scale productions.
- short-spinning apparatuses did not allow one to obtain staple fibers having good thermoweldability values (higher than 2.5 N, for example, according to the measuring method described in the examples).
- the process of the present invention therefore, assumes particular importance when short-spinning apparatuses are used, because it solves the problem of producing thermoweldable staple fibers even when operating with said apparatuses.
- the hole flow rate ranges from 0.005 to 0.18 g.min, preferably from 0.008 to 0.070 g/min, more preferably from 0.010 to 0.030 g/min.
- the fiber gathering speed ranges from 30 to 500 m/min, preferably from 40 to 250 m/min, more preferably from 50 to 100 m/min.
- the draw ratios range from 1.10 to 3.50, preferably from 1.20 to 2.50.
- the fiber cooling and solidification space at the output of the die (cooling space) is preferably greater than 2 mm, more preferably greater than 10 mm, in particular from 10 to 350 mm.
- cooling space is the distance between the die and the above mentioned air jet or flow.
- the draw temperature be lower than 100°C, in particular it should range from 15°C to 50°C.
- the spinning temperature for the above long-spinning and short-spinning apparatuses generally ranges from 240°C to 310°C, preferably from 270°C to 300°C.
- the equipment used in the process of spun-bonding normally includes an extruder with a die on its spinning head, a cooling tower, and an air suction gathering device that uses Venturi tubes.
- this device that uses air speed to control the fiber gathering speed, the filaments are usually gathered over a conveyor belt, where they are distributed forming a web for heat welding in a calender.
- the hole flow rate ranges from 0.1 to 2.0 g/min; preferably from 0.2 to 1.0 g/min.
- the space where fibers cool and solidify after leaving the die is preferably greater than 2 mm, more preferably greater than 10 mm and in particular in the range between 10 and 350 mm.
- the fibers are generally cooled by means of an air jet or flow.
- the cooling space is the distance between the die and this air jet or flow.
- the spinning temperature is generally between 230°C adn 300°C, preferably between 240°C and 280°C.
- the amount of diene in (B) is from 1% to 10% by weight.
- the heterophasic copolymers (3) are prepared according to known methods by mixing the components in the molten state, or by sequential copolymerization, and generally contain the copolymer fraction (B) in quantities ranging from 5% to 80% by weight.
- thermoweldable fibers particularly suitable for the preparation of thermoweldable fibers are the following propylene random copolymers:
- copolymers can also be used mixed with each other and/or with isotactic or mainly isotactic propylene homopolymers.
- thermoweldable fibers particularly suitable for the preparation of thermoweldable fibers are heterophasic copolymers comprising from 5% to 95% by weight of an isotactic or mainly isotactic propylene homopolymer, and/or a random propylene copolymer of the above mentioned types from a) to d), and from 95% to 5% by weight of a composition selected from:
- the above mentioned olefin polymers when used in the production of staple fibers the above mentioned olefin polymers have a Melt Flow Rate (MFR), determined according to ASTM D 1238-L, ranging from 0.5 to 100 g/10 min., preferably from 1.5 to 35 g/10 min..
- MFR Melt Flow Rate
- the above mentioned olefin polymers When used in the spun-bonding apparatuses with the process of the present invention, the above mentioned olefin polymers have preferably a MFR value between 5 and 25 g/10 min., in particular from 8 to 15 g/10 min.. These values of MFR constitute an additional distinctive feature of the process of the invention, because in conventional spun-bonding processes polyolefins have a MFR greater than 25 g/10 min.
- the olefin polymers which are subjected to spinning with either process of the present invention are stabilized with the types and quantities of stabilizers described in published European patent application 391438.
- the polyolefins to be used for spinning contain one or more of the following stabilizers:
- the above stabilizers can be added to the polyolefins by means of pelletization or surface coating, or they can be mechanically mixed with the polyolefins.
- phosphites are: tris(2,4-di-tert-butylphenyl)phosphite marketed by CIBA GEIGY under the trademark Irgafos 168; distearyl pentaerythritol diphosphite marketed by BORG-WARNER CHEMICAL under the trademark Weston 618; 4,4'-butylidenebis(3-methyl-6-tert-butylphenyl-di-tridecyl)phosphite marketed by ADEKA ARGUS CHEMICAL under the trademark Mark P; tris(monononyl phenyl)phosphite; bis(2,4-di-tert-butyl)-pentaerythritol diphosphite, marketed by BORG-WARNER CHEMICAL under the trademark Ultranox 626.
- a preferred example of phosphonites is the tetrakis(2,4-di-tert-butylphenyl)4,4'-diphenylilenediphosphonite, on which Sandostab P-EPQ, marketed by Sandoz, is based.
- the HALS are monomeric or oligomeric compounds containing in the molecule one or more substituted amine, preferably piperidine, groups.
- HALS containing substituted piperidine groups are the compounds sold by CIBA-GEIGY under the following trademarks: Chimassorb 944 Chimassorb 905 Tinuvin 770 Tinuvin 292 Tinuvin 622 Tinuvin 144 Spinuvex A36 and the product sold by American CYANAMID under the mark Cyasorb UV 3346.
- phenolic antioxidants are: tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-s-triazine-2-4-6-(1H,3H,5H)-trione, marketed by American CYANAMID under the trademark Cyanox 1790; calcium bi[monoethyl(3,5-di-tert-butyl-4-hydroxy-benzyl)phosphonate];1,3,5-tris(3,5-di-tert-butyl-4- hydroxybenzyl)-s-triazine-2,4,6(1H,3H,5H)trione; 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; pentaerythrityl-tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]; octadecyl 3-(3,5
- thermoweldability of fibers a nonwoven fabric is prepared from the fiber being tested by calendering under certain given conditions. Subsequently, the tension needed to tear said nonwoven fabric both in the direction parallel and transversal to the calendering is measured.
- the tension value determined in this fashion is considered a measure of the fiber thermowelding capability.
- the result is influenced substantially by the finishing characteristics of the fibers (crimping, surface finishing, thermosetting, etc.), and by the homogeneity of distribution of the fibers entering the calender. To avoid these inconveniences and obtain a more direct evaluation of the fiber thermoweldability characteristics a method has been perfected that will be described below.
- Specimens are prepared from a 400 tex roving (method ASTM D 1577-7) 0.4 meter long, made up of continuous fibers.
- thermowelding is carried out on said specimen using a Bruggel HSC-ETK thermowelding machine, operating at a plate temperature of 150°C, using a clamping pressure of 800 N and 1 second welding times.
- a dynamometer is used to measure the average strength required to separate the two halves of the roving which constitute each specimen at the thermowelding point.
- the result expressed in Newton, is obtained by averaging out at least eight measurements, and represents the thermowelding strength of the fibers.
- the polymers used in the examples to produce the fibers are the following:
- Said mechanical mixture has been obtained by introducing the components into a CACCIA speed mixer model LABO 30, and mixing for 4 minutes at 1400 rpm.
- the Chimassorb 944 is a HALS having the formula wherein n generally ranges from 2 to 20.
- the characteristics of the fibers obtained in this manner are: - single fiber count (according to ASTM D 1577-79) 1.7 dtex - weldability 4.1 N
- Example 2 The same polymer, apparatus and conditions of Example 1 are used, except that the die has 61 round holes and the output diameter is 0.4 mm.
- the characteristics of the fibers obtained in this manner are: - single fiber count 1.7 dtex - weldability 2.0 N
- the spinning conditions are as follows: - temperature 300°C - hole flow rate 0.018 g/min. - distance between the die and cooling airflow 5 mm - gathering speed 70 m/min. - draw temperature 80°C - draw ratio 1.4
- the characteristics of the fibers obtained in this manner are: - single fiber count 2.3 dtex - weldability 6.85 N
- Example 2 The same apparatus and conditions of Example 2 are used to produce staple fibers, except that one uses the polypropylene III.
- the characteristics of the fibers obtained in this manner are: - single fiber count 2.3 dtex - weldability 6.5 N
- Staple fibers are produced using the same polymer, apparatus and conditions of Example 2, except that the distance between the die and the cooling airflow is 15 mm.
- the characteristics of the fibers obtained in this manner are: - single fiber count 2.3 dtex - weldability 7.6 N
- Staple fibers are produced using the same polymer, apparatus and conditions of Example 2, except that the drawing occurs at ambient temperature.
- the characteristics of the fibers obtained in this manner are: - single fiber count 2.3 dtex - weldability 10 N
- Staple fibers are produced using the same polymer of Example 2, an industrial apparatus made up of 8 spinning units identical to the one described in Example 2, but whose dies have 5.18x104 round holes having a output diameter of 0.4 mm.
- the spinning conditions are: - temperature 285°C - hole flow rate 0.018 g/min. - distance between the die and cooling airflow 5 mm - gathering speed 64 m/min. - draw temperature 80°C - draw ratio 1.5
- the characteristics of the fibers obtained in this manner are: - single fiber count 2.3 dtex - weldability 2.35 N
- Comparative example 2 The same apparatus and conditions of Comparative example 2 are used to produce staple fibers, except that polypropylene III is used.
- the spinning conditions are: - temperature 295°C - hole draw ratio 0.024 g/min. - distance between the die and cooling airflow 5 mm - gathering speed 70 m/min. - draw temperature 80°C - draw ratio 1.35
- the characteristics of the fibers obtained in this manner are: - single fiber count 2.3 dtex - weldability 2.2 N
- fibers are prepared using a BARMAG 25 mod. 2E1/24D apparatus for spun-bonding, manufactured and sold by BARMER MASHINENFABRIK A.G. Manufacture.
- the lay out of the apparatus is as follows:
- the same polymer is used, with the same apparatus and working under the same conditions as in Example 6, except that the die has 37 circular section holes with a output hole diameter of 0.4 mm.
- the characteristics of the obtained fibers are: - single fiber count 2.2 dtex - weldability 2.04 N
- Fibers are produced with the same apparatus and working under the same conditions as in Example 6, but using polypropylene III.
- the obtained fibers have the following characteristics: - single fiber count 2.2 dtex - weldability 5.8 N
- Fibers are produced with the same polymer used in Example 8, and the same apparatus used in Example 6, but the die contains 37 holes of circular section and the output hole diameter is equal to 0.4 mm.
- the obtained fibers have the following characteristics: - single fiber count 2.2 dtex - weldability 2.1 N
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Abstract
Description
- The present invention relates to a spinning process for the preparation of thermoweldable polyolefin fibers, in particular polypropylene based fibers, suitable for the preparation of nonwoven fabrics.
- Said nonwoven fabrics are particularly suitable for uses requiring considerable softness and tear resistance, as is the case with coverstock for diapers and sanitary wear, which are made from low count fibers, generally ranging from 0.2 to 5 dtex, or with also membranes, made from fibers having a count between 3 and 10 dtex. The fundamental requirement of polyolefin fibers for nonwoven fabrics is that they must bond to each other by means of the joint action of temperature and pressure on which the hot calendering processes are based. This characteristic, called "thermoweldability", is not always present in polyolefin fibers, or at least not in the same degree. In fact basically thermoweldability depends on the type of polyolefin being span, the additives it contains, the type of process and the spinning conditions used.
- Published European patent application 391438 describes polyolefin compositions suitable for spinning and characterized by the presence of stabilizers selected from organic phosphites and/or phosphonites, HALS (Hindered Amine Light Stabilizers) and optionally phenolic antioxidants.
- The same patent application describes thermoweldable fibers obtained from the above mentioned stabilized polyolefin compositions by conventional spinning processes, in particular processes for the production of staple fibers. In this case the good levels of thermoweldability shown in the examples are due to the selection of the stabilizers. In the above mentioned examples fibers having a count ranging from 1.9 to 2.2 dtex are prepared by using a typical "long-spinning" apparatus (characterized, among other things, by high fiber-winding speed) equipped with a die having holes with 0.4 mm diameter.
- Using a die whose holes have a small diameter (less than or equal to 0.4 mm) to produce low count fibers is typical of both the above mentioned long-spinning apparatus, as well as the "short- spinning" apparatus both used for producing staple fibers, and of the spun-bonding machines, because it enables high production levels to be obtained.
- In fact, the smaller the diameter of the holes, the higher the numbers of holes in the die, which means more fibers per unit of time. This is the reason why in the art the use of dies with diameters of the holes greater than 0.4 mm is limited to the production of high-count fibers (higher than 5 dtex).
- Now it has surprisingly been found that, both in the production of staple fibers and in the spun-bonding process, the use of dies with holes having diameters greater than or equal to 0.5 mm results in a marked increase of the thermoweldability of the fibers, provided that, for fibers having a count greater than 4 dtex, the ratio of hole diameter to the count is high enough.
- Accordingly, the present invention provides a process for the preparation of thermoweldable fibers having preferably a count ranging from 0.2 to 10 dtex, more preferably from 0.5 to 3 dtex, where the dies used have a real or equivalent output diameter of the holes greater than or equal to 0.5 mm, particularly ranging from 0.5 to 2 mm, with the proviso that for fibers having a count greater than or equal to 4 dtex, the ratio of the said output hole diameter to the count is greater than or equal to 0.06 mm/dtex, preferably greater than or equal to 0.08 mm/dtex, more preferably greater than or equal to 0.1 mm/dtex.
- As used herein, "output diameter of the holes" is the diameter of the holes at the outside surface of the die, i.e., on the front face of the die from which the fibers exit. Inside the thickness of the die, the diameter of the holes can be different from the diameter of the holes at the output. The "equivalent output diameter of the holes" refers to instances where the hole is not round, in which case, for the purpose of the present invention, one considers the diameter of the ideal circle having an area equal to the area of the output hole, which corresponds to the above mentioned equivalent diameter.
- As previously stated, the process of the present invention can be carried out by using both long-spinning and short-spinning apparatuses for the production of staple fibers, and spun-bonding apparatuses.
- Long-spinning apparatuses normally comprise a first spinning segment where the fibers are extruded and air-cooled in a quenching column. Subsequently, these fibers go to the finishing steps during which they are drawn, crimped-bulked and cut. Generally, the above mentioned finishing steps are carried out intermittently with respect to the spinning, in a specific section where the fiber rovings are gathered into one single roving having a total count ranging from 100 and 200 kilotex. Said roving is then sent to drawing, crimping-bulking and cutting apparatuses which operate in sequence at a spinning speed ranging from 100 to 200 m/min. In other types of long-spinning apparatuses the above mentioned finishing steps are carried out in sequence with the spinning step. In this case the fibers go directly from the gathering to the drawing rollers, where they are drawn at a somewhat contained ratio (not greater than 1.5). Subsequently, they are gathered in rovings with a count of about 5 kilotex, then subjected to crimping-bulking and cutting at a speed comparable with that of the spinning.
- Moreover, the long-spinning apparatuses allow for a better control of the process parameters compared to the control one has with the short-spinning apparatus. The process conditions which are generally adopted when using the long-spinning apparatuses are the following:
- hole flow rate >0.2 g/min;
- fiber-gathering speed ≧ 500 m/min;
- space where the fibers cool off and solidify after exiting the die >0.50 m.
- The above mentioned conditions can also be used in the process of the present invention when the operation is carried out with the long-spinning apparatus and the dies used are the ones described above.
- Preferably one operates within the following time ranges:
- hole flow rate from 0.15 to 1.0 g/min, preferably from 0.2 to 0.5 g/min;
- fiber-gathering speed ranging from 500 to 3500 m/min, preferably from 600 to 2000 m/min.
- Moreover, it is preferable that the draw ratio be from 1.1 to 4.0.
- For further details on the long-spinning apparatuses reference is made to Friedhelm Hauser "Plastics Extrusion Technology", Hauser Publishers, 1988, chapter 17.
- It has been found that thermoweldability of staple fibers improves as the fibers gathering speed decreases. In particular, in the case of staple fibers, the process of the present invention is particularly advantageous when the short-spinning apparatuses are used, said apparatuses being characterized, among other things, by low fiber-gathering speeds (less than 500 m/min).
- The above mentioned short-spinning apparatuses allow for a continuous operation, since the spinning speed is compatible with the drawing, crimping and cutting speeds, and due to their simplicity and reduced overall volume, these apparatuses are more economical than the long-spinning ones and suited for small scale productions. However, up until now short-spinning apparatuses did not allow one to obtain staple fibers having good thermoweldability values (higher than 2.5 N, for example, according to the measuring method described in the examples). The process of the present invention, therefore, assumes particular importance when short-spinning apparatuses are used, because it solves the problem of producing thermoweldable staple fibers even when operating with said apparatuses.
- The process conditions which are best suited to be used according to the present invention using short-spinning apparatuses are the following.
- The hole flow rate ranges from 0.005 to 0.18 g.min, preferably from 0.008 to 0.070 g/min, more preferably from 0.010 to 0.030 g/min. The fiber gathering speed ranges from 30 to 500 m/min, preferably from 40 to 250 m/min, more preferably from 50 to 100 m/min. The draw ratios range from 1.10 to 3.50, preferably from 1.20 to 2.50. Moreover, the fiber cooling and solidification space at the output of the die (cooling space) is preferably greater than 2 mm, more preferably greater than 10 mm, in particular from 10 to 350 mm.
- Said cooling is generally induced by an air jet or flow. Therefore, the cooling space is the distance between the die and the above mentioned air jet or flow.
- Finally, according to the present invention it is preferable that the draw temperature be lower than 100°C, in particular it should range from 15°C to 50°C. For further details on the short-spinning apparatuses reference is made to M. Ahmed, "Polypropylene fibers science and technology", Elsevier Scientific Publishing Company (1982) pages 344-346.
- The spinning temperature for the above long-spinning and short-spinning apparatuses generally ranges from 240°C to 310°C, preferably from 270°C to 300°C.
- The equipment used in the process of spun-bonding normally includes an extruder with a die on its spinning head, a cooling tower, and an air suction gathering device that uses Venturi tubes.
- Underneath this device, that uses air speed to control the fiber gathering speed, the filaments are usually gathered over a conveyor belt, where they are distributed forming a web for heat welding in a calender.
- According to this invention, when using typical spun-bonding machinery, it is convenient to apply the process conditions that follows.
- The hole flow rate ranges from 0.1 to 2.0 g/min; preferably from 0.2 to 1.0 g/min.
- The space where fibers cool and solidify after leaving the die (the cooling space) is preferably greater than 2 mm, more preferably greater than 10 mm and in particular in the range between 10 and 350 mm.
- The fibers are generally cooled by means of an air jet or flow. The cooling space is the distance between the die and this air jet or flow.
- The spinning temperature is generally between 230°C adn 300°C, preferably between 240°C and 280°C.
- Generally, the olefin polymers that can be used in the process of the present invention for the production of thermoweldable fibers are polymers or copolymers, and their mixtures, of R-CH=CH₂ olefins where R is a hydrogen atom or a C₁-C₆ alkyl radical. Particularly preferred are the following polymers:
- 1) isotactic or mainly isotactic propylene homopolymers;
- 2) crystalline copolymers of propylene with ethylene and/or C₄-C₈ alpha-olefins, such as for example 1-butene, 1-hexene, 1-octene, 4-methyl-1-pentene, wherein the total comonomer content ranges from 0.05% to 20% by weight, or mixtures of said copolymers with isotactic or mainly isotactic propylene homopolymers ;
- 3) heterophasic copolymers comprising (A) a propylene homopolymer and/or one of the copolymers of item 2), and an elastomeric fraction (B) comprising copolymers of ethylene with propylene and/or a C₄-C₈ alpha-olefin, optionally containing minor quantities of a diene, such as butadiene, 1,4-hexadiene, 1,5-hexadiene, ethylidene-1-norbornene.
- Preferably the amount of diene in (B) is from 1% to 10% by weight.
- The heterophasic copolymers (3) are prepared according to known methods by mixing the components in the molten state, or by sequential copolymerization, and generally contain the copolymer fraction (B) in quantities ranging from 5% to 80% by weight.
- Specific examples of olefin polymers particularly suitable for the preparation of thermoweldable fibers are the following propylene random copolymers:
- a) crystalline propylene random copolymers containing from 1.5% to 20% by weight of ethylene or C₄-C₈ alpha-olefins;
- b) crystalline propylene random copolymers containing from 85% to 96% by weight of propylene, from 1.5% to 5% by weight of ethylene, and from 2.5% to 10% by weight of a C₄-C₈ alpha- olefin;
- c) crystalline propylene random copolymers compositions comprising (percentages by weight):
- (1) from 30% to 65% of a copolymer of propylene with a C₄-C₈ alpha-olefin, containing from 80% to 98% of propylene; and
- (2) from 35% to 70% of a propylene copolymer with ethylene, and optionally with a C₄-C₈ alpha-olefin in quantity ranging from 2% to 10%; said copolymer containing from 2% to 10% of ethylene when the above mentioned C₄-C₈ alpha-olefin is not present, and from 0.5% to 5% of ethylene when the C₄-C₈ alpha-olefin is present;
- d) compositions of crystalline propylene random copolymers and crystalline ethylene copolymers comprising (percentages by weight):
- (1) from 40% to 70% of one or more crystalline propylene copolymers with one or more comonomers selected from ethylene and/or C₄-C₈ alpha-olefin, wherein the comonomer or comonomers content is from 5% to 20%;
- (2) from 30% to 60% of LLDPE having a MFR E (according to ASTM D 1238) from 0.1 to 15.
- The above mentioned copolymers can also be used mixed with each other and/or with isotactic or mainly isotactic propylene homopolymers.
- Other specific examples of olefin polymers particularly suitable for the preparation of thermoweldable fibers are heterophasic copolymers comprising from 5% to 95% by weight of an isotactic or mainly isotactic propylene homopolymer, and/or a random propylene copolymer of the above mentioned types from a) to d), and from 95% to 5% by weight of a composition selected from:
- (I) a composition comprising:
- (i) 10-60 parts by weight of propylene homopolymer with an isotactic index higher than 90, or of a crystalline copolymer of propylene with ethylene and/or another C₄-C₈ alpha-olefin, containing over 85% by weight of propylene, and having an isotactic index higher than 85;
- (ii) 10-40 parts by weight of a crystalline polymer fraction containing ethylene, insoluble in xylene at ambient temperature;
- (iii) 30-60 parts by weight of an amorphous ethylenepropylene copolymer fraction optionally containing minor portions of a diene, soluble in xylene at ambient temperature and containing from 40 to 70% by weight of ethylene;
- (II) a composition comprising:
- (i) 10-50 parts by weight of propylene homopolymer with an isotactic index higher than 80, or a copolymer of propylene with ethylene and/or a C₄-C₈ alpha-olefin containing over 85% by weight of propylene;
- (ii) 5-20 parts by weight of a copolymer fraction containing ethylene, insoluble in xylene at ambient temperature;
- (iii) 40-80 parts by weight of a copolymer fraction of ethylene with propylene and/or a C₄-C₈ alpha-olefin, and optionally with minor portions of diene, containing less than 40% by weight of ethylene, said fraction being soluble in xylene at ambient temperature, and having an intrinsic viscosity ranging from 1.5 to 4 dl/g.
- Specific examples of C₄-C₈ alpha olefins and dienes have been given above.
- Generally, when used in the production of staple fibers the above mentioned olefin polymers have a Melt Flow Rate (MFR), determined according to ASTM D 1238-L, ranging from 0.5 to 100 g/10 min., preferably from 1.5 to 35 g/10 min..
- When used in the spun-bonding apparatuses with the process of the present invention, the above mentioned olefin polymers have preferably a MFR value between 5 and 25 g/10 min., in particular from 8 to 15 g/10 min.. These values of MFR constitute an additional distinctive feature of the process of the invention, because in conventional spun-bonding processes polyolefins have a MFR greater than 25 g/10 min.
- The above said values of MFR are obtained directly in polymerization, or by controlled degradation. In order to obtain said controlled degradation one adds, for example, organic peroxides in the spinning line or in the preceding steps of pelletization of the olefin polymers. Olefin polymers are generally used in the form of pellets or nonextruded particles, such as flakes or spheres, for example.
- Preferably the olefin polymers which are subjected to spinning with either process of the present invention are stabilized with the types and quantities of stabilizers described in published European patent application 391438. According to said patent application the polyolefins to be used for spinning contain one or more of the following stabilizers:
- a) from 0.01 to 0.5% by weight of one or more organic phosphites and/or phosphonites;
- b) from 0.005 to 0.5% by weight of one or more HALS (Hindered Amine Light Stabilizer);
- The above stabilizers can be added to the polyolefins by means of pelletization or surface coating, or they can be mechanically mixed with the polyolefins.
- Specific examples of phosphites are:
tris(2,4-di-tert-butylphenyl)phosphite marketed by CIBA GEIGY under the trademark Irgafos 168; distearyl pentaerythritol diphosphite marketed by BORG-WARNER CHEMICAL under the trademark Weston 618; 4,4'-butylidenebis(3-methyl-6-tert-butylphenyl-di-tridecyl)phosphite marketed by ADEKA ARGUS CHEMICAL under the trademark Mark P; tris(monononyl phenyl)phosphite; bis(2,4-di-tert-butyl)-pentaerythritol diphosphite, marketed by BORG-WARNER CHEMICAL under the trademark Ultranox 626. - A preferred example of phosphonites is the tetrakis(2,4-di-tert-butylphenyl)4,4'-diphenylilenediphosphonite, on which Sandostab P-EPQ, marketed by Sandoz, is based.
- The HALS are monomeric or oligomeric compounds containing in the molecule one or more substituted amine, preferably piperidine, groups.
- Specific examples of HALS containing substituted piperidine groups are the compounds sold by CIBA-GEIGY under the following trademarks:
Chimassorb 944 Chimassorb 905 Tinuvin 770 Tinuvin 292 Tinuvin 622 Tinuvin 144 Spinuvex A36
and the product sold by American CYANAMID under the mark Cyasorb UV 3346. - Examples of phenolic antioxidants are: tris-(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl)-s-triazine-2-4-6-(1H,3H,5H)-trione, marketed by American CYANAMID under the trademark Cyanox 1790; calcium bi[monoethyl(3,5-di-tert-butyl-4-hydroxy-benzyl)phosphonate];1,3,5-tris(3,5-di-tert-butyl-4- hydroxybenzyl)-s-triazine-2,4,6(1H,3H,5H)trione; 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene; pentaerythrityl-tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]; octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate, marketed by CIBA GEIGY under the trademarks Irganox 1425; Irganox 3114; Irganox 1330, Irganox 1010, Irganox 1076 respectively; 2,6-dimethyl-3-hydroxy-4-tert-butyl benzyl abietate.
- The following examples are given in order to illustrate and not limit the present invention.
- Generally, in order to evaluate the thermoweldability of fibers, a nonwoven fabric is prepared from the fiber being tested by calendering under certain given conditions. Subsequently, the tension needed to tear said nonwoven fabric both in the direction parallel and transversal to the calendering is measured.
- The tension value determined in this fashion is considered a measure of the fiber thermowelding capability.
- The result, however, is influenced substantially by the finishing characteristics of the fibers (crimping, surface finishing, thermosetting, etc.), and by the homogeneity of distribution of the fibers entering the calender. To avoid these inconveniences and obtain a more direct evaluation of the fiber thermoweldability characteristics a method has been perfected that will be described below.
- Specimens are prepared from a 400 tex roving (method ASTM D 1577-7) 0.4 meter long, made up of continuous fibers.
- After the roving has been twisted eighty times, the two extremities are united, thus obtaining a product where the two halves of the roving are entwined as in a rope.
- The thermowelding is carried out on said specimen using a Bruggel HSC-ETK thermowelding machine, operating at a plate temperature of 150°C, using a clamping pressure of 800 N and 1 second welding times.
- A dynamometer is used to measure the average strength required to separate the two halves of the roving which constitute each specimen at the thermowelding point. The result, expressed in Newton, is obtained by averaging out at least eight measurements, and represents the thermowelding strength of the fibers.
- The polymers used in the examples to produce the fibers are the following:
- Mechanical mixture of propylene homopolymer having MFRL of 13 g/10 min and a fraction soluble in xylene at 25°C equal to 3.5% by weight, in the form of flakes with a controlled particle size distribution (average diameter of the particles 450µm), containing:
additive concentration (by weight) Irganox 1076 0.01% Irganox 3114 0.01% Irgafos 168 0.07% Calcium stearate 0.05% - Said mechanical mixture has been obtained by introducing the components into a CACCIA speed mixer model LABO 30, and mixing for 4 minutes at 1400 rpm.
- Same composition as for Polypropylene I, but in the form of pellets, as the above said mechanical mixture has been granulated by extrusion.
- Propylene homopolymer in spheroidal particle form with a diameter ranging from 2 to 3 mm, having a MFR of 12.2 g/10 min. and a fraction soluble in xylene at 25°C equal to 4.2% by weight, surface additivated with:
additive concentration (by weight) Irganox 1076 0.01% Chimassorb 994 0.02% Sandostab P-EPQ 0.05% Calcium stearate 0.05% -
- Using the above defined polypropylene I, staple fibers are prepared on a LEONARD 25 long spinning apparatus, built and marketed by Costruzioni Meccaniche Leonard - Sumirago (VA) - Italy. The set-up of the apparatus is as follows:
- extruder with a screw having a 25 mm diameter and a length/diameter ratio of 25, and a flow-rate ranging from 1 to 6 Kg/h;
- 2.5 cm³/rev. metering pump;
- die having 61 round holes with an output diameter of 0.8 mm;
- cooling system for the extruded filaments by means of transversal air jet at 18-20°C;
- gathering apparatus with a speed ranging from 1000-6000 m/min.;
- drawing apparatus in steam oven.
- The following process conditions are used for the spinning operation:
- die temperature 280°C - hole flow rate 0.3 g/min. - gathering speed 1400 m/min. - draw ratio 1.3 - draw temperature 100°C - The characteristics of the fibers obtained in this manner are:
- single fiber count (according to ASTM D 1577-79) 1.7 dtex - weldability 4.1 N - The same polymer, apparatus and conditions of Example 1 are used, except that the die has 61 round holes and the output diameter is 0.4 mm.
- The characteristics of the fibers obtained in this manner are:
- single fiber count 1.7 dtex - weldability 2.0 N - Using the above defined polypropylene I, staple fibers with a short-spinning pilot apparatus set up as follows are prepared:
- single-screw extruder with a 120mm diameter and a length equal to 30 diameters;
- 150 cm³/rev. metering pump;
- die with 3.5x10⁴ round holes and a 0.6 mm output diameter; said holes being situated in the form of a crown;
- cooling device, coaxial to the crown of holes of the die, emitting 20°C air on a plane perpendicular to the exiting fibers.
- The spinning conditions are as follows:
- temperature 300°C - hole flow rate 0.018 g/min. - distance between the die and cooling airflow 5 mm - gathering speed 70 m/min. - draw temperature 80°C - draw ratio 1.4 - The characteristics of the fibers obtained in this manner are:
- single fiber count 2.3 dtex - weldability 6.85 N - The same apparatus and conditions of Example 2 are used to produce staple fibers, except that one uses the polypropylene III.
- The characteristics of the fibers obtained in this manner are:
- single fiber count 2.3 dtex - weldability 6.5 N - Staple fibers are produced using the same polymer, apparatus and conditions of Example 2, except that the distance between the die and the cooling airflow is 15 mm.
- The characteristics of the fibers obtained in this manner are:
- single fiber count 2.3 dtex - weldability 7.6 N - Staple fibers are produced using the same polymer, apparatus and conditions of Example 2, except that the drawing occurs at ambient temperature.
- The characteristics of the fibers obtained in this manner are:
- single fiber count 2.3 dtex - weldability 10 N - Staple fibers are produced using the same polymer of Example 2, an industrial apparatus made up of 8 spinning units identical to the one described in Example 2, but whose dies have 5.18x10⁴ round holes having a output diameter of 0.4 mm. The spinning conditions are:
- temperature 285°C - hole flow rate 0.018 g/min. - distance between the die and cooling airflow 5 mm - gathering speed 64 m/min. - draw temperature 80°C - draw ratio 1.5 - The characteristics of the fibers obtained in this manner are:
- single fiber count 2.3 dtex - weldability 2.35 N - The same apparatus and conditions of Comparative example 2 are used to produce staple fibers, except that polypropylene III is used.
- The spinning conditions are:
- temperature 295°C - hole draw ratio 0.024 g/min. - distance between the die and cooling airflow 5 mm - gathering speed 70 m/min. - draw temperature 80°C - draw ratio 1.35 - The characteristics of the fibers obtained in this manner are:
- single fiber count 2.3 dtex - weldability 2.2 N -
- Using polypropylene I, fibers are prepared using a BARMAG 25 mod. 2E1/24D apparatus for spun-bonding, manufactured and sold by BARMER MASHINENFABRIK A.G. Manufacture. The lay out of the apparatus is as follows:
- an extruder with a screw 25 mm in diameter and a ratio lenght/diameter of 24; the extruder has a flow rate between 0.3 and 1.2 kg/hr;
- a metering pump of 0.6 cm³/rev.
- a die with 37 holes of circular section having a output hole diameter of 0.8 mm;
- a cooling system for the extruded fibers by transverse air jet at 18-20°C;
- an air suction gathering device using a Venturi tube, with a gathering speed ranging between 500-4000 m/min.
- The same polymer is used, with the same apparatus and working under the same conditions as in Example 6, except that the die has 37 circular section holes with a output hole diameter of 0.4 mm.
The characteristics of the obtained fibers are:- single fiber count 2.2 dtex - weldability 2.04 N - Using polypropylene II, fibers and nonwoven fabrics are prepared with a pilot appartus for spun-bonding made by the German company LURGI. The layout of the apparatus is as follows:
- rectangular dies containing 931 holes of circular section and with a output hole diameter of 0.9 mm.
- an air cooling device at 20°C, acting on a plane perpendicular to the emergent fibers.
- Fibers are produced with the same apparatus and working under the same conditions as in Example 6, but using polypropylene III.
The obtained fibers have the following characteristics:- single fiber count 2.2 dtex - weldability 5.8 N - Fibers are produced with the same polymer used in Example 8, and the same apparatus used in Example 6, but the die contains 37 holes of circular section and the output hole diameter is equal to 0.4 mm.
The obtained fibers have the following characteristics:- single fiber count 2.2 dtex - weldability 2.1 N
- die temperature | 280°C |
- hole flow rate | 0.6 g/min. |
- gathering speed | 2700 m/min. |
- distance between the die and and the cooling air jet. | 20 mm |
The characteristics of the obtained fibers are:
- single fiber count | 2.2 dtex |
- weldability | 5.4 N |
- temperature | 280°C |
- hole flow rate | 0.52 g/min. |
- distance between the die and the cooling air flow | 30 mm |
- gathering speed | 2300 m/min. |
The fibers obtained under these conditions have the following characteristics:
- single fiber count | 2.3 dtex |
- weldability | 6.4 N |
Claims (14)
- A process for the preparation of thermoweldable polyolefin fibers, wherein the dies used have a real or equivalent output diameter of the holes greater than or equal to 0.5 mm, with the proviso that for fibers having a count greater than or equal to 4 dtex, the ratio of the said output diameter of the holes to the count is greater than or equal to 0.06 mm/dtex.
- The process of claim 1, wherein the real or equivalent output diameter of the holes ranges from 0.5 to 2 mm.
- The process of claim 1, wherein the operation is carried out using a long-spinning apparatus for staple fibers.
- The process of claim 3, wherein the hole flow rate ranges from 0.15 to 1 g/min., the fiber gathering speed ranges from 500 to 3500 m/min and the draw ratio ranges from 1.1 to 4.0.
- The process of claim 1, wherein the operation is carried out using a short-spinning apparatus for staple fibers.
- The process of claim 5, wherein the hole flow rate ranges from 0.005 to 0.18 g/min., the fiber gathering speed ranges from 30 to 500 m/min and the draw ratio ranges from 1.10 to 3.50.
- The process of claim 5, wherein the cooling space is greater than 2 mm.
- The process of claim 5, wherein the draw temperature used is lower than 100°C.
- The process of claim 1, wherein the operation is carried out using a spun-bonding apparatus.
- The process of claim 9 wherein the hole flow rate ranges from 0.1 to 2.0 g min. and the fiber gathering speed ranges from 400 to 4500 m/min.
- The process of claim 10, wherein the cooling space is greater than 2 mm.
- The process of claim 9, wherein the olefin polymers subjected to spinning have a MFR from 5 to 25 g/10 min..
- The process of claim 1, wherein the olefin polymers subjected to spinning are selected from:1) isotactic, or mainly isotactic propylene homopolymers;2) crystalline copolymers of propylene with ethylene and/or C₄-C₈ alpha-olefins wherein the total comonomer content ranges from 0.05% to 20% by weight, or mixtures of said copolymers with isotactic or mainly isotactic propylene homopolymers;3) heterophasic copolymers comprising (A) a propylene homopolymer and/or one of the copolymers of item 2), and an elastomeric fraction (B) comprising copolymers of ethylene with propylene and/or a C₄-C₈ alpha-olefin, optionally containing minor quantities of a diene.
- The process of claim 1, wherein the olefin polymers subjected to spinning contain one or more of the following stabilizers:a) from 0.01 to 0.5% by weight of one or more organic phosphites and/or phosphonites;b) from 0.005 to 0.5% by weight of one or more HALS;and optionally one or more phenolic antioxidants in concentrations which do not exceed 0.02% by weight.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI931308 | 1993-06-17 | ||
IT001308 IT1264839B1 (en) | 1993-06-17 | 1993-06-17 | Spinning process for prodn. of thermo:weldable polyolefin fibres - provides nonwoven fabrics with good softness and tear resistance e.g. cover:stock for nappy |
ITMI940390 IT1274029B (en) | 1994-03-04 | 1994-03-04 | Spinning process for prodn. of thermo:weldable polyolefin fibres - provides nonwoven fabrics with good softness and tear resistance e.g. cover:stock for nappy |
ITMI940390 | 1994-03-04 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0629720A2 true EP0629720A2 (en) | 1994-12-21 |
EP0629720A3 EP0629720A3 (en) | 1995-07-12 |
EP0629720B1 EP0629720B1 (en) | 1998-01-28 |
Family
ID=26331006
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94109406A Expired - Lifetime EP0629720B1 (en) | 1993-06-17 | 1994-06-17 | Spinning process for the preparation of high thermoweldability polyolefin fibers |
Country Status (12)
Country | Link |
---|---|
EP (1) | EP0629720B1 (en) |
JP (1) | JP2849042B2 (en) |
KR (1) | KR100199683B1 (en) |
CN (1) | CN1069352C (en) |
AT (1) | ATE162860T1 (en) |
CA (1) | CA2126013C (en) |
DE (1) | DE69408213T2 (en) |
DK (1) | DK0629720T3 (en) |
ES (1) | ES2113579T3 (en) |
FI (1) | FI942889A (en) |
HK (1) | HK1008435A1 (en) |
TW (1) | TW270153B (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0878567A2 (en) * | 1997-05-14 | 1998-11-18 | PCD Polymere AG | Polyolefin fibres and polyolefin yarns and textile materials thereof |
DE19720135A1 (en) * | 1997-05-14 | 1998-11-19 | Danubia Petrochem Polymere | High strength, melt spun polypropylene@ fibre, yarn and fabric with high elongation at break |
DE19722579A1 (en) * | 1997-05-30 | 1998-12-03 | Danubia Petrochem Polymere | High strength, melt spun polypropylene@ fibre, yarn and fabric with high elongation at break |
WO1999006617A1 (en) * | 1997-07-31 | 1999-02-11 | Fibervisions Incorporated | Compact long spin system |
EP0905299A2 (en) * | 1997-09-30 | 1999-03-31 | Montell North America Inc. | Method for producing spun-bonded materials |
WO2002031237A1 (en) * | 2000-10-11 | 2002-04-18 | Sunoco, Inc. (R&M) | High strength spunbond fabric |
WO2003044083A1 (en) * | 2001-11-16 | 2003-05-30 | Sunoco, Inc. (R & M) | A stabilization system for improving the melt viscosity of polypropylene during fiber processing |
EP1383945A1 (en) * | 2001-02-02 | 2004-01-28 | Polymer Group Inc. | Process for producing continuous filament nonwoven fabric |
WO2017186935A1 (en) | 2016-04-29 | 2017-11-02 | Beaulieu International Group Nv | Bi-component staple or short-cut trilobal fibres and their uses |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5773375A (en) * | 1996-05-29 | 1998-06-30 | Swan; Michael D. | Thermally stable acoustical insulation |
CN107880400A (en) * | 2016-09-29 | 2018-04-06 | 中国石油化工股份有限公司 | A kind of impact polypropylene resin with low tension fracture elongation rate |
KR102631607B1 (en) | 2023-07-19 | 2024-01-31 | 공필주 | One-touch fastening type separable communication |
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US4211819A (en) * | 1977-05-24 | 1980-07-08 | Chisso Corporation | Heat-melt adhesive propylene polymer fibers |
EP0391438A2 (en) * | 1989-04-06 | 1990-10-10 | Montell North America Inc. | Polyolefins suitable for spinning and thermoweldable fibers obtained from them |
EP0552013A2 (en) * | 1992-01-13 | 1993-07-21 | Hercules Incorporated | Thermally bondable fiber for high strength non-woven fabrics |
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DE2545223C3 (en) * | 1975-10-09 | 1978-03-30 | Basf Ag, 6700 Ludwigshafen | Self-extinguishing thermoplastic molding compounds |
JPS575913A (en) * | 1980-05-27 | 1982-01-12 | Showa Electric Wire & Cable Co Ltd | Crosslinked polyolefin fiber |
JPS58144113A (en) * | 1982-02-16 | 1983-08-27 | Taisei Rayon Kk | Production of polyethylene multifilament yarn for fish net |
JPS61239011A (en) * | 1985-04-15 | 1986-10-24 | Kanebo Ltd | Conductive synthetic fiber of polyolefin and production thereof |
JPS62282014A (en) * | 1986-05-30 | 1987-12-07 | Seiken:Kk | Production of fiber |
-
1994
- 1994-06-16 FI FI942889A patent/FI942889A/en unknown
- 1994-06-16 CA CA002126013A patent/CA2126013C/en not_active Expired - Fee Related
- 1994-06-16 KR KR1019940013636A patent/KR100199683B1/en not_active IP Right Cessation
- 1994-06-17 CN CN94107510A patent/CN1069352C/en not_active Expired - Fee Related
- 1994-06-17 AT AT94109406T patent/ATE162860T1/en not_active IP Right Cessation
- 1994-06-17 JP JP6159156A patent/JP2849042B2/en not_active Expired - Fee Related
- 1994-06-17 DK DK94109406T patent/DK0629720T3/en active
- 1994-06-17 ES ES94109406T patent/ES2113579T3/en not_active Expired - Lifetime
- 1994-06-17 TW TW083105487A patent/TW270153B/zh active
- 1994-06-17 EP EP94109406A patent/EP0629720B1/en not_active Expired - Lifetime
- 1994-06-17 DE DE69408213T patent/DE69408213T2/en not_active Expired - Fee Related
-
1998
- 1998-07-17 HK HK98109256A patent/HK1008435A1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US4211819A (en) * | 1977-05-24 | 1980-07-08 | Chisso Corporation | Heat-melt adhesive propylene polymer fibers |
EP0391438A2 (en) * | 1989-04-06 | 1990-10-10 | Montell North America Inc. | Polyolefins suitable for spinning and thermoweldable fibers obtained from them |
EP0552013A2 (en) * | 1992-01-13 | 1993-07-21 | Hercules Incorporated | Thermally bondable fiber for high strength non-woven fabrics |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19720135A1 (en) * | 1997-05-14 | 1998-11-19 | Danubia Petrochem Polymere | High strength, melt spun polypropylene@ fibre, yarn and fabric with high elongation at break |
EP0878567A3 (en) * | 1997-05-14 | 2001-01-17 | Borealis GmbH | Polyolefin fibres and polyolefin yarns and textile materials thereof |
EP0878567A2 (en) * | 1997-05-14 | 1998-11-18 | PCD Polymere AG | Polyolefin fibres and polyolefin yarns and textile materials thereof |
DE19720135B4 (en) * | 1997-05-14 | 2005-12-08 | Borealis Gmbh | Non-postdrawn polyolefin fibers and high tenacity and elongated polyolefin yarns and fabrics made therefrom |
DE19722579B4 (en) * | 1997-05-30 | 2004-02-12 | Borealis Gmbh | Fibers and yarns of high tenacity and elongation, process for their production and use |
DE19722579A1 (en) * | 1997-05-30 | 1998-12-03 | Danubia Petrochem Polymere | High strength, melt spun polypropylene@ fibre, yarn and fabric with high elongation at break |
WO1999006617A1 (en) * | 1997-07-31 | 1999-02-11 | Fibervisions Incorporated | Compact long spin system |
US5948334A (en) * | 1997-07-31 | 1999-09-07 | Fiberco, Inc. | Compact long spin system |
EP0905299A2 (en) * | 1997-09-30 | 1999-03-31 | Montell North America Inc. | Method for producing spun-bonded materials |
EP0905299A3 (en) * | 1997-09-30 | 1999-09-22 | Montell North America Inc. | Method for producing spun-bonded materials |
WO2002031237A1 (en) * | 2000-10-11 | 2002-04-18 | Sunoco, Inc. (R&M) | High strength spunbond fabric |
EP1383945A1 (en) * | 2001-02-02 | 2004-01-28 | Polymer Group Inc. | Process for producing continuous filament nonwoven fabric |
EP1383945A4 (en) * | 2001-02-02 | 2005-06-01 | Polymer Group Inc | Process for producing continuous filament nonwoven fabric |
US6787066B2 (en) | 2001-11-16 | 2004-09-07 | Sunoco Inc (R&M) | Stabilization system for improving the melt viscosity of polypropylene during fiber processing |
WO2003044083A1 (en) * | 2001-11-16 | 2003-05-30 | Sunoco, Inc. (R & M) | A stabilization system for improving the melt viscosity of polypropylene during fiber processing |
WO2017186935A1 (en) | 2016-04-29 | 2017-11-02 | Beaulieu International Group Nv | Bi-component staple or short-cut trilobal fibres and their uses |
Also Published As
Publication number | Publication date |
---|---|
CA2126013C (en) | 2000-08-15 |
FI942889A (en) | 1994-12-18 |
DE69408213D1 (en) | 1998-03-05 |
JPH07189021A (en) | 1995-07-25 |
DK0629720T3 (en) | 1998-09-23 |
KR100199683B1 (en) | 1999-06-15 |
TW270153B (en) | 1996-02-11 |
HK1008435A1 (en) | 1999-05-07 |
JP2849042B2 (en) | 1999-01-20 |
ES2113579T3 (en) | 1998-05-01 |
CN1069352C (en) | 2001-08-08 |
ATE162860T1 (en) | 1998-02-15 |
CN1106867A (en) | 1995-08-16 |
DE69408213T2 (en) | 1998-07-09 |
EP0629720A3 (en) | 1995-07-12 |
CA2126013A1 (en) | 1994-12-18 |
KR950000933A (en) | 1995-01-03 |
FI942889A0 (en) | 1994-06-16 |
EP0629720B1 (en) | 1998-01-28 |
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