Synthesis Method ntawm PVC Stretch Fabric
PVC stretch npuag (Polyvinyl Chloride Stretch Fabric) yog cov khoom siv sib xyaw ua ke uas ua los ntawm polyvinyl chloride (PVC) los ntawm cov txheej txheem tshwj xeeb. Nws yog dav siv nyob rau hauv daim ntaub ntawv xws li tents, advertising fabrics, raincoats, thiab awnings. Nws cov synthesis suav nrog ntau cov kauj ruam tseem ceeb, suav nrog cov khoom siv raw proportioning, mixing, plasticization, stretching, and post- processing. Kev tswj nruj ntawm cov txheej txheem tsis yog yuav tsum tau ua kom ntseeg tau tias kev ua haujlwm ntawm cov khoom tiav.
Raw Materials thiab Pretreatment
Cov khoom siv tseem ceeb rau PVC stretch npuag yog polyvinyl chloride resin, feem ntau raug tshem tawm lossis emulsion PVC nrog lub cev hnyav molecular thiab zoo thermal stability. Txhawm rau txhim kho nws yooj yim, huab cua tsis kam, thiab kev ua haujlwm, ntau yam khoom ntxiv tau ntxiv, suav nrog cov yas yas (xws li phthalates), stabilizers (xws li calcium-zinc complex stabilizers), lubricants (xws li stearic acid), fillers (xws li calcium carbonate), thiab UV stabilizers. Cov additives no yuav tsum tau muab sib xyaw ua ke nrog PVC cob rau hauv cov proportions tshwj xeeb kom ntseeg tau tias muaj kev sib txawv.
Mixing thiab Plasticization
Cov khoom siv raw sib xyaw yog ib kauj ruam tseem ceeb hauv kev sib xyaw ntawm PVC stretch ntaub. Ua ntej, PVC resin thiab ntau yam additives yog muab tso rau hauv lub siab - sib tov ceev raws li tus qauv piv. Qhov sib tov yog nplawm ntawm 80-120℃rau 10-20 feeb kom tso cai rau cov plasticizer kom nkag mus rau hauv PVC cov khoom thiab tsim ib qho kev sib xyaw qhuav. Cov khoom xyaw qhuav ces nkag mus rau hauv ib qho khoom sib xyaw lossis ntxaib-ntsia hlau extruder rau plasticization. Thaum tshav kub kub thiab shear yaj lub PVC rau hauv ib tug uniform yaj. Lub plasticization kub feem ntau yog tswj ntawm 160-190 degree. Kev kub siab heev tuaj yeem ua rau PVC decomposition, thaum kub qis heev tuaj yeem cuam tshuam cov dej ntws.
stretching
Cov yas PVC yaj tuaj yeem tsim rau hauv cov ntaub hauv paus siv calendering lossis tshuab molding. Calendering yuav tsum nias lub yaj los ntawm ntau- yob calender rau hauv cov yeeb yaj kiab nyias, uas tom qab ntawd laminated rau cov khoom siv hauv paus (xws li knitted lossis tsis yog- ntaub npuag) thiab txias los ua cov ntaub sib xyaw. Stretching yog ib kauj ruam tseem ceeb hauv kev txhim kho qhov yooj thiab ductility ntawm PVC stretch ntaub. Lub hauv paus ntaub yog feem ntau stretched longitudinally los yog transversely nyob rau hauv cua sov (80-120 degree), feem ntau yog 2-3 zaug. Tom qab ncab, cov khoom siv dhau los ua cov txheej txheem cua sov los txhim kho cov saw molecular orientation thiab tiv thaiv shrinkage.
Ncej -Kev Ua Haujlwm thiab Kev Ua Haujlwm Zoo
PVC stretch ntaub ua tiav tau ua kom txias, winding, thiab kho qhov chaw (xws li txheej nrog tus neeg tso tawm lossis luam ntawv). Txhawm rau txhim kho huab cua tiv thaiv, qee cov khoom yog coated nrog coatings xws li acrylic los yog polyurethane. Tsis tas li ntawd, kev sim ua kom zoo (xws li lub zog tensile, lub zog tsim kua muag, thiab ntsuas kub tsis kam) ua kom cov khoom ua tau raws li cov qauv kev thov.
Txoj kev sib xyaw ua ke ntawm PVC stretch npuag ua tiav cov khoom ua tau zoo ntawm - cov khoom siv ua haujlwm sib txuas ua ke, dej tsis kam, thiab ua haujlwm ntev los ntawm kev tswj cov khoom siv raw, qhov kub thiab txias, thiab kev ua haujlwm, thaum kawg ua tau raws li kev xav tau ntawm kev lag luam.