Cov yam ntxwv ntawm cov khoom siv raw
HDPE (high-density polyethylene): [cov khoom no yog tsim los ua lub raj mis],
Hom tshuaj dawb lub raj mis, lub raj mis khoom noj qab haus huv, cov khoom siv tu lub raj mis, cov khoom siv da dej fwj, lub raj mis tshuaj tua kab thiab lwm cov ntim khoom yog ua los ntawm HDPE. Lub thawv feem ntau yog opaque thiab xav tias waxy.
Cov yam ntxwv: PE tuaj yeem tiv taus 110 degree siab kub, yog cov yas siv dav tshaj plaws hauv kev lag luam thiab lub neej, feem ntau muab faib ua high density polyethylene (HDPE) thiab low density polyethylene (LDPE) ob yam. PE muaj kev tiv thaiv zoo rau acidity thiab alkalinity. HDPE yog siab dua LDPE melting point, hardness, thiab ntau resistant rau corrosive kua yaig.
PET (polyethylene terephthalate): [Cov khoom no haum rau lub raj mis],
cov thawv ntim cov khoom siv no yog cov dej ntxhia hauv cov fwj dej, cov raj mis carbonated, thiab lwm yam. Thaum tshav kub kub resistant rau 70 degree yooj yim deformation, muaj teeb meem rau tib neeg lub cev cov ntaub ntawv yaj.
Cov yam ntxwv: PET lub raj mis muaj qhov ua tau zoo thiab tawv, lub teeb yuag (tsuas yog 1/9 ~ 1/15 ntawm lub khob iav qhov hnyav), yooj yim nqa thiab siv, tsawg zog noj thaum lub sij hawm tsim khoom, ntxiv rau breathable, non-volatile, acid thiab alkali resistant, nws yog cov khoom ntim zoo rau cov dej qab zib carbonated. Tsis tas li ntawd, xws li tshuaj zawv plaub hau, tshuaj zawv plaub hau, roj zaub, khoom noj khoom haus, khoom noj qab zib, tshuaj, tshuaj pleev ib ce, thiab lub raj mis ntim dej cawv, PET lub raj mis yog siv ntau.
PP (polypropylene): [Cov khoom no yog tsim rau lub raj mis thiab hau],
Common soy mis nyuj lub raj mis, yogurt lub raj mis, kua txiv lub raj mis, lub raj mis yas hau, lub thawv microwave thiab hais txog.
Nta: Melting point mus txog 167 degree, tsuas yog microwavable yas rooj plaub. Cov khoom ntim khoom yog lub thawv opaque lossis translucent, nrog qhov zoo ntawm cov kua qaub thiab alkali tsis kam, tshuaj tiv thaiv, kev sib tsoo tsis kam thiab kub siab (kwv yees li 20 degree ~ 120 degree).
PETE: [Cov khoom no haum rau lub raj mis],
Nws muaj kev ua tau zoo heev nyob rau hauv daim ntawv thov ntau yam, thiab yog siv dav hauv cov ntaub ntawv sib khi, cov ntaub ntawv zawv zawg, cov ntaub ntawv tiv thaiv corrosion, cov ntaub ntawv rwb thaiv tsev thiab cov ntaub ntawv kho mob.
Kev ua tau zoo: (1) Kev ua haujlwm dav dav F4 zoo li yog cov hmoov dawb dawb, tsis muaj tshuaj lom, tsis qab, tsis muaj ntxhiab, tsis muaj hluav taws kub, tsis muaj kev sib txuas, tsis muaj dej nqus, zoo roj teeb meem; (2) Cov khoom siv hluav taws xob F4 muaj qhov ua kom sov thiab txias ua haujlwm, thiab tuaj yeem siv tau ntev hauv thaj tsam ntawm -195 degree ~ 250 degree . Nws thermal conductivity yog 0.25W/(m•K) thiab nws coefficient ntawm linear expansion yog me dua li feem ntau plastics thiab nce nrog kub. (3) Lub zog zoo ntawm cov cuab yeej siv tshuab F4 yog kev sib txhuam qis thiab nws tus kheej lubrication, thiab nws cov kev sib txhuam coefficient yog qhov qis tshaj ntawm cov yas, thiab cov hlau tsis muaj zog thiab zoo li qub yog 0.04; Tab sis F4 hauv av hnav tsis zoo, yuav tsum tau ntxiv molybdenum disulfide, graphite thiab lwm yam hnav-resistant cov ntaub ntawv hloov kho. Lwm yam khoom ntawm F4 yog qhov nruab nrab, nrog lub zog tensile tsis zoo, khoov lub zog, cuam tshuam lub zog, rigidity, hardness, creep resistance, qaug zog thiab lwm yam khoom. (4) Kev ua haujlwm hluav taws xob ntawm F4 yog hluav taws xob rwb thaiv tsev zoo heev, dielectric poob Lub kaum sab xis tus nqi me me, qhov pib tsis cuam tshuam los ntawm qhov kub thiab txias, av noo thiab zaus, tuaj yeem siv rau hauv cov av noo; Lub corona tsis kam ntawm F4 tsis zoo, tsis tuaj yeem siv los ua cov khoom siv hluav taws xob siab; Zoo arc tsis kam, mus txog 360s (5) ib puag ncig kev ua tau zoo F4 muaj tshuaj lom neeg ruaj khov, tuaj yeem tiv taus ntau yam ntawm cov kuab tshuaj muaj zog xws li cov kua qaub, muaj zog alkali thiab muaj zog oxidant, thiab txawm tiv taus "aqua huab tais"; Tam sim no, tsuas yog kub kub molten alkali hlau xws li sodium, fluorine, trifluoride vinyl chloride thiab ob peb lwm yam khoom muaj peev xwm muaj qee yam cuam tshuam rau nws ntawm qhov kub thiab txias. Cov huab cua tsis kam ntawm F4 yog qhov zoo heev, thiab qhov ua tau zoo yog qhov tsis hloov pauv sab nraum zoov rau rau xyoo. Tab sis hluav taws xob tiv thaiv tsis zoo, tom qab raug gamma rays ua nkig.