Typical Melt-spun fibersAlternativeMeltingRemarksChemical name of extrudateSpinningDesignationPoint (C)Temperature,(°C)220Nylon-6MonofilamentPolypentamethylene carbonamide260280-290Nylon-6,6Polyhexamethylene adipamide2602GT:PET280-300Poly(ethylene terephthalate)2244GT:PTMT:PBT240-260Poly(tetramethylene terephthalate)130225-300Polyethylene170250-300Polypropylene175Saran120-140Poly(vinylidenechloride)MonofilamentcopolymersPolyurethanesPolysulfides
Typical Melt-spun fibers Chemical name of extrudate Alternative Designation Melting Point ( oC) Spinning Temperature, ( oC) Remarks Polypentamethylene carbonamide Nylon-6 220 Monofilament Polyhexamethylene adipamide Nylon-6,6 260 280-290 Poly(ethylene terephthalate) 2GT; PET 260 280-300 Poly(tetramethylene terephthalate) 4GT; PTMT; PBT 224 240-260 Polyethylene 130 225-300 Polypropylene 170 250-300 Poly(vinylidene chloride) copolymers Saran 120-140 175 Monofilament Polyurethanes Polysulfides
Manufacturing Technologies> Wet spinning process is a fundamental method ofspinningfrom solutionsSolventPolymerSolution VesselFilterFeed VesselFilterMetening PumpToWashing andWindupor StretchingSpinneretHeatExchangerSpin Bath Containing Coagulant本Spent CoagulantFresh Coagulant
Manufacturing Technologies ➢ Wet spinning process is a fundamental method of spinning from solutions
Typical Wet-spinning solvents and CoagulantsCoagulantISOFiberChemicalConcentratiClassSolventStructure ofFiberon,%CoagulantCelluloseWaterCuprocuprammoniumaqueoushydroxideacidicAlginatecalciumsaltaqueous solution of sodiumslightlyofaqueousalginic acidsalt ofalginic acidcalcium hydroxideProteinarachin,zein,dilute sodium hvdroxidedilute sulfuric acid + sodiumorcaseinsulfate17-25Acrylicof50%aqueousCopolymerdimethylformamide(<85acrylonitriledimethylformamide%)20withwt50%aqueousdimethylacetamide(DMA)dimethylacetamideothermonomers20Dimethyl sulfoxide50%aqueousdimethylsulfoxide10-1550%sodiumthiocyanate10%sodiumthiocyanate1060%zinc chloride30%zincchloride1070%nitric acid30%nitric acid15-2090% ethylene carbonate30%ethylene carbonate
Typical Wet-spinning solvents and Coagulants ISO Fiber Class Chemical Structure of Fiber Solvent Coagulant Coagulant Concentrati on, % Cupro Cellulose aqueous cuprammonium hydroxide Water Alginate calcium salt of alginic acid aqueous solution of sodium salt of alginic acid slightly acidic aqueous calcium hydroxide Protein arachin, zein, or casein dilute sodium hydroxide dilute sulfuric acid + sodium sulfate Acrylic Copolymer of acrylonitrile (<85 wt %) with other monomers dimethylformamide dimethylacetamide (DMA) Dimethyl sulfoxide 50%sodium thiocyanate 60%zinc chloride 70%nitric acid 90%ethylene carbonate 50 % aqueous dimethylformamide 50% aqueous dimethylacetamide 50% aqueous dimethylsulfoxide 10% sodium thiocyanate 30% zinc chloride 30% nitric acid 30% ethylene carbonate 17-25 20 20 10-15 10 10 15-20
Typical Wet-spinning solvents and CoagulantsCoagulantISOFiberChemicalConcentratioClassSolventn, %Structure ofFiberCoagulantViscoseCelluloseaqueous solution of sodiumdilute sulfuric acid + sodium7-10salt andxanthate estersulfate+zinc sulfatewaterModalaqueous solution of sodiumdilute sulfuric acidsodium+10sulfate + zinc sulfatesaltandxanthate ester50%15-25Modacryliofcopolymertoacetone,upacrylonitrile, 35-85acrylonitrileCaqueousacetonewithwt%,dimethylformamide(DMF)>50%acrylonitrileothermonomersaqueousdimethylformamideVinylalWater10-18aqueous sodium sulfatepoly(vinyl alcohol),posttreatedwithformaldehydepoly(p-phenylene-20Aramid100%sulfuricacidwater or dilute sulfuric acidterephthalamide)DMFsegmented30%aqueousDMFDMA18-30elastinepolyurethane30%aqueousDMA
Typical Wet-spinning solvents and Coagulants poly(p-phenyleneISO Fiber Class Chemical Structure of Fiber Solvent Coagulant Coagulant Concentratio n, % Viscose Cellulose aqueous solution of sodium salt and xanthate ester dilute sulfuric acid + sodium sulfate + zinc sulfate water 7-10 Modal aqueous solution of sodium salt and xanthate ester dilute sulfuric acid + sodium sulfate + zinc sulfate 10 Modacryli c copolymer of acrylonitrile, 35-85 wt%, with other monomers acetone, up to 50% acrylonitrile dimethylformamide (DMF) >50%acrylonitrile aqueous acetone aqueous dimethylformamide 15-25 Vinylal poly(vinyl alcohol), posttreated with formaldehyde Water aqueous sodium sulfate 10-18 Aramid 100%sulfuric acid water or dilute sulfuric acid 20 terephthalamide) elastine segmented polyurethane DMF DMA 30%aqueous DMF 30%aqueous DMA 18-30
ManufacturingTechnologies> When a polymer is soluble in a volatile solvent, adry-spinning procedure is applied.PolymerSohent4SolventSolution VesselRecoveryFilterFeed VesselMetering PunpHeatExchangerFilterHotSolvent-RichSp inneretGasSpinning Cab iteHotSolvent-PooyGasFinishApplicatorToWinduporDrawingHaul-OffRoll
➢ When a polymer is soluble in a volatile solvent, a dry-spinning procedure is applied. Manufacturing Technologies