Polyurethane (PU) yog ib qho tshwj xeeb polymer uas elastic zoo li roj hmab tab sis tuaj yeem rov ua dua thiab hloov kho zoo li cov yas. Cov khoom siv tawv, hloov tau yooj yim thiab tawv tawv no tuaj yeem tsim los siv ntau yam khoom siv los tsim txhua yam los ntawm cov xim rau lub tsheb, khau khau thiab cov ntsaws ruaj ruaj. Puas yog Polyurethane yog yas?
Yog li dab tsi yog polyurethane thiab nws puas yog yas?
Polyurethanes (PU) yog cov khoom siv polymers (cov khoom ua los ntawm ntev, rov ua cov saw hlau ntawm cov molecules) nrog ntau yam chemistry uas tsim cov ntaub ntawv uas coj zoo li cov yas thiab cov roj hmab. PUs yog tsim los ntawm reacting ib polyol, uas yog ib tug cawv nrog ntau tshaj ob reactive hydroxyl pawg ib molecule, nrog ib tug diisocyanate los yog ib tug polymeric isocyanate nyob rau hauv lub xub ntiag ntawm haum catalysts thiab additives. Qhov kawg tshwm sim yog ib tug polymer boasting zoo tensile zog ua ke nrog zoo heev tsim kua muag thiab puas kuj.
Nws yog ntau yam ntawm cov khoom pib uas siv tau uas ua kom PUs nthuav tawm ob qho tib si yas thiab roj hmab. Muaj PUs uas yog rubbery thiab elastic, uas tuaj yeem yaj thiab tsim rau hauv qhov chaw thiab lub voj voog rov ua dua! Qhov no txhais tau hais tias cov khoom siv Polyurethane tuaj yeem tsim tau siv cov nqi-zoo, ruaj khov Polyurethane casting thiab molding cov txheej txheem. Ob qho tib si yog cov txiaj ntsig zoo rau cov chaw tsim khoom niaj hnub no.
PUs tuaj nyob rau hauv ntau yam hardnesses siv tsuas yog ob los yog peb chemicals ua ke nyob rau hauv ib tug ntse txoj kev. Cov ntaub ntawv no yog tawv, yoog raws thiab hnav hnyav. Cov khoom siv PU tuaj yeem ua xim thiab ua tiav rau qib siab gloss. Lawv tuaj yeem raug tsim los suav nrog cov khoom siv, xws li hlau kho, lwm yam polymers, lossis PUs ntawm qhov sib txawv hardness. Qhov zoo ntawm Polyurethane tsis nres ntawd.
Qhov zoo ntawm Polyurethane
Ua tsaug rau tsis muaj qhov me me rau lawv cov qib siab ntawm kev ua haujlwm ntev thiab ua haujlwm zoo rau oxidation, ozone thiab roj av raws roj thiab roj, PUs yog cov khoom siv ntau yam. Qhov tseeb tias lawv tuaj yeem raug tsim los ua nruj lossis hloov pauv ua rau lawv haum rau ntau yam kev siv. Piv txwv li, Polyurethane yog ib qho kev xaiv zoo tshwj xeeb rau cov khoom siv pwm tsim rau kev siv roj thiab roj.
Polyurethane kuj nthuav tawm cov khoom hluav taws xob zoo, uas ua rau nws muaj txiaj ntsig tshwj xeeb tshaj yog cov txheej txheem los tiv thaiv cov khoom hluav taws xob. Nws yog feem ntau siv los thaiv cov tsev thiab cov khoom dawb, xws li cov tub yees thiab lub tub yees. Qhov tseeb, 1.6cm tuab Polyurethane ntawv ntawm rwb thaiv tsev xa tib lub rwb thaiv tsev li 1.34m tuab pob zeb phab ntsa! Raws li PUs feem ntau yog kua cam khwb cia, cov nqi siv kuj zoo li qis dua rau cov cua sov thiab siab molded elastomers.
Kev siv ntawm polyurethane
Cam khwb cia PU yog siv nyob rau hauv ib tug loj array ntawm daim ntaub ntawv, nrog rau cov hauv qab no:
Abrasion-resistant coatings
Moulded diaphragms
Gaskets
Haul-off pads
Hoses
Cov ntsaws ruaj ruaj