Spandex yog polyurethane fiber, los yog elastic fiber ntau vim nws elasticity zoo heev, vim nws elasticity unparalleled elasticity, nws tau dav siv nyob rau hauv elastic khaub ncaws fabrics, thiab muaj txawm hais tias tsis muaj ammonia tsis yog ib daim ntaub. Yog li koj puas paub dab tsi yog vim li cas rau qhov zoo elasticity ntawm spandex fiber?
Lub ntsiab yog vim li cas spandex yog ib tug polymer compound, thiab kev ua tau zoo ntawm cov ntaub ntawv polymer yog txiav txim los ntawm nws cov qauv, nyob rau hauv uas lub polymer qauv muaj xws li ib tug molecular qauv thiab lub xeev cov qauv ntawm ntau molecules.
Nyob rau hauv cov nqe lus ntawm lub microstructure ntawm spandex ib macromolecules, lub spandex macromolecular saw yog ib tug linear block copolymer muaj li ntawm polyether (mos ntu) alternately nrog urethane, isocyanate thiab urea daim ntawv cog lus (nyuaj saw segment). Cov ntu mos tuaj yeem thim rov qab thiab txuas nrog cov ntu nyuaj, thiab kev hloov pauv ntawm cov ntu mos thiab tawv yog sib npaug rau kev tsim cov kab me me.
Nyob rau hauv cov qauv sib sau ua ke ntawm spandex ntau lub molecules, nws cov saw hlau ntu tau yooj yim crystallized urethane thiab urea qauv, thiab imino thiab carbonyl pawg ntawm cov saw hlau molecular tuaj yeem tsim muaj zog hydrogen bonding. Cov hlua muag muag tuaj yeem txav mus los ywj pheej tom qab kev ntxhov siab ntawm chav tsev kub, thiab lub zog ntawm cov saw hlau molecular tsis muaj zog heev. Tom qab cov seem nyuaj yog ncab thiab taw qhia, ib qho crystalline entanglement yog tsim, thiab cov seem mos tuaj yeem txav tau zoo li lub caij nplooj ntoos hlav, uas yog sib npaug rau ntau qhov me me rau hauv cov nuv ntses, uas muaj ob qho tib si elasticity thiab elasticity, thiab tuaj yeem siv tau. crystalline node ntawm cov seem nyuaj kom rub rov qab thiab ntsws.
Yog li ntawd, cov xov paj spandex tsim los ntawm lub caij nplooj ntoos hlav zoo li nuv ntses net qauv muaj nws qhov tsis sib xws ultra-siab elasticity. Spandex woven rau hauv khaub ncaws tuaj yeem cuam tshuam txog kev zoo nkauj ntawm tib neeg lub cev.