Polyester, feem ntau hu ua "polyester". Nws yog ib qho hluavtaws fiber ntau tau los ntawm spinning polyester ua los ntawm cov organic diacid thiab diol polycondensation, uas yog ib tug polymer compound. Qhov zoo tshaj plaws ntawm polyester fiber yog tias nws muaj qhov zoo wrinkle tsis kam thiab zoo li qub, thiab muaj zog thiab elastic rov qab. Nws yog ruaj, wrinkle-resistant, tsis nplaum, thiab tsis nplaum.
(1) Xim. Polyester feem ntau yog milky dawb nrog mercerized, zus tau tej cov matte TiO2 ua ntej spinning, zus tau tej cov dawb huv cov khoom yuav tsum tau ntxiv whitening tus neeg sawv cev, zus tau tej cov xim yarn yuav tsum tau ntxiv pigments los yog dyes nyob rau hauv lub spinning yaj.
(2) Nto thiab cross-sectional zoo li. Pa polyester muaj ib tug du nto thiab ib tug yuav luag puag ncig cross-section. Yog tias siv cov spinnerets tshwj xeeb, cov fibers uas muaj cov duab sib txawv tshwj xeeb tuaj yeem ua tau, xws li daim duab peb sab, Y-puab, hollow thiab lwm yam tshwj xeeb-zoo li tus ntoo khaub lig-sectional nyob ntawm tej.
(3) Ceev. Thaum polyester yog kiag li amorphous, qhov ceev yog 1.333g / cm3. Thaum tag nrho crystallized, nws yog 1.455g / cm3, feem ntau polyester muaj ib tug high degree ntawm crystallinity, qhov ceev yog 1.38 ~ 1.40g / cm3, thiab ntaub plaub (1.32g / cm3) zoo ib yam.
(4) Moisture regain rate. Cov dej noo rov qab tus nqi ntawm polyester hauv lub xeev tus qauv yog 0.4%, uas yog qis dua li ntawm acrylic (1% ~ 2%) thiab nylon (4%). Kev nqus dej noo ntawm polyester yog tsawg, yog li nws lub zog ntub dej tsawg dua, thiab cov ntaub muaj zoo washability; Txawm li cas los xij, qhov tshwm sim ntawm hluav taws xob zoo li qub yog qhov hnyav thaum ua thiab hnav, thiab cov ntaub muaj qhov ua tsis taus pa tsis zoo thiab nqus dej noo.
(5) Kev ua haujlwm thermal. Lub softening point T ntawm polyester yog 230-240 degree, lub melting point Tm yog 255-265 degree, thiab decomposition point T yog hais txog 300 degree. Polyester tuaj yeem hlawv hauv hluav taws, curl, thiab yaj rau hauv cov hlaws, nrog cov pa luam yeeb dub thiab tsw ntxhiab tsw.
(6) Lightfastness. Nws lightfastness yog thib ob tsuas yog acrylic. Lub lightfastness ntawm polyester muaj feem xyuam rau nws cov qauv molecular, polyester tsuas muaj ib tug muaj zog nqus band nyob rau hauv lub 315nm lub teeb yoj cheeb tsam, yog li lub zog tsuas yog 60% poob tom qab 600h ntawm tshav ntuj, uas zoo ib yam li paj rwb.
(7) Cov khoom siv hluav taws xob. Polyester muaj kev ua haujlwm tsis zoo vim qhov nqus noo noo tsawg, thiab qhov dielectric tas li nyob rau hauv thaj tsam ntawm -100~{2}} degree yog 3.0~ 3.8, uas yog ib qho zoo heev insulator.