Kev nthuav dav ntawm cov yas li qub

Txawm hais tias cov yas yas qee zaum pom tias yog cov khoom lag luam tshwj xeeb - kev xaiv sab saum toj ntawm cov neeg tsim lossis tsim cov kav dej yas rau cov tshuab ua lag luam lossis leej twg yuav tsum muaj cov khoom siv huv huv hauv qhov chaw - piv txwv tias cov li qub no tsis muaj ntau yam kev siv luv luv- pom. Nyob rau hauv qhov tseeb, yas li qub niaj hnub no muaj ntau yam kev siv raws li kev nthuav dav ntawm cov ntaub ntawv thiab cov neeg tsim qauv zoo uas xav tau cov ntaub ntawv no txhais tau tias ntau thiab ntau txoj hauv kev los siv cov cuab yeej no ntau yam.

PLASTIC'S PROPERTIES
Qhov zoo ntawm cov yas li qub yog dav-corrosion, tshuaj lom neeg thiab abrasion tsis kam; du hauv phab ntsa; lub teeb nyhav; yooj yim ntawm installation; ntev-lub neej expectancy; thiab txo tus nqi ntawm lub neej voj voog. Cov txiaj ntsig zoo no tau ua rau muaj kev lees paub dav dav ntawm cov yas li qub hauv kev lag luam thiab kev lag luam xws li kev faib dej, kev kho dej khib nyiab, kev ua hlau thiab tshuaj, khoom noj thiab tshuaj, cov nroj tsuag hluav taws xob, roj refineries thiab lwm yam.
Yas li qub tuaj yeem tsim los ntawm ntau cov ntaub ntawv sib txawv siv hauv ntau qhov kev teeb tsa. Feem ntau cov yas li qub yog ua los ntawm polyvinyl chloride (PVC), chlorinated polyvinyl chloride (CPVC), polypropylene (PP), thiab polyvinylidene fluoride (PVDF). PVC thiab CPVC li qub feem ntau koom nrog cov kav dej los ntawm cov kuab tshuaj cementing qhov xaus, los yog threaded thiab flanged kawg; whereas, PP thiab PVDF xav tau kev koom ua ke ntawm cov kav dej sib txuas, xws li cua sov-, taub qab- lossis electro-fusion technologies.

Txawm hais tias polypropylene muaj ib nrab lub zog ntawm PVC thiab CPVC, nws muaj ntau yam tshuaj tiv thaiv vim tsis muaj cov kuab tshuaj paub. PP ua tau zoo nyob rau hauv cov concentrated acetic acids thiab hydroxides, thiab nws kuj yog haum rau me me kev daws teeb meem ntawm feem ntau acids, alkalis, ntsev thiab ntau yam organic tshuaj.

PP yog muaj raws li cov khoom siv pigmented lossis unpigmented (natural). Ntuj PP yog degraded heev los ntawm ultraviolet (UV) hluav taws xob, tab sis cov tebchaw uas muaj ntau tshaj 2.5% carbon dub pigmentation yog txaus UV stabilized.

PVDF piping tshuab yog siv nyob rau hauv ntau yam kev lag luam siv los ntawm kws tshuaj mus rau mining vim PVDF lub zog, ua hauj lwm kub thiab tshuaj tiv thaiv rau ntsev, muaj zog acids, dilute bases thiab ntau organic solvents. Tsis zoo li PP, PVDF tsis degraded los ntawm tshav ntuj; Txawm li cas los xij, cov yas yog pob tshab rau lub hnub ci thiab tuaj yeem nthuav tawm cov kua dej rau UV hluav taws xob. Thaum lub ntuj tsim, unpigmented formulation ntawm PVDF yog zoo heev rau high-purity, sab hauv tsev daim ntaub ntawv, ntxiv ib tug pigment xws li cov zaub mov qib liab yuav tso cai rau raug tshav ntuj yam tsis muaj kev phiv rau cov kua nruab nrab.