PB yeeb nkab (polybutene) yog hom molecular inert polymer, uas yug hauv xyoo 1970s. Nws muaj kev kub hnyav, kav ntev, tshuaj lom neeg ruaj ntseg thiab zoo, tsis yog mob toxic, tasteless, ntxhiab, tam sim no yog ib lub ntiaj teb feem ntau cov ntaub ntawv tshuaj, muaj ib lub koob npe nrov "yas kub". Cov khoom yog lub teeb hauv qhov hnyav; Zoo yooj yim; Corrosion kuj, cov khoom kub uas tsis muaj zog resistant tshwj xeeb tshaj yog thaum siv nyob rau hauv lub siab, yuav siv ntev mus siv hauv qab 95 ℃, qhov kub siab tshaj plaws ncav cuag 110 ℃. Qhov paug ntawm qhov yeeb nkab ntawm cov yeeb nkab no yog 0.007, tsis muaj kev nplua, tsis muaj kev txuag hluav taws kub, kev tiv thaiv dej zoo, kev siv zoo.
1. PB cov yeeb nkab muaj cov qauv zoo ntawm cov tshuaj tiv thaiv thiab tsis xuas lwm tus kav hlau yas. Cov ntaub ntawv ntau cov yeeb nkab, nws yog qhov zoo tshaj plaws compressive yeeb nkab khoom.
2. PB yeeb nkab yog cov khoom kub heev, thiab nws txoj kev ntsuas cua sov kuj zoo kawg nkaus, thiab nws txoj kev sib tw kuj zoo heev. Cov yeeb nkab yuav pom zoo li tsis yog - cov tshuaj lom, tsis muaj zog thiab cov yeeb nkab zoo tshaj plaws. Qhov zoo tshaj plaws huv cov yeeb nkab.
PB yeeb nkab yog ib hom roj molecular polymer, uas yog ib qho ntawm ntau cov ntaub ntawv tshaj tshuaj hauv lub ntiaj teb. Nws yog ib yam khoom ntawm thermoplastic yeeb nkab khoom uas muaj kev tiv thaiv zoo, qhov siab tshaj plaws kub tau ncav cuag 110 degrees, poob siab kuj tsis haum.
4. PB yeeb nkab yog qhov ntau ntawm cov cua kub, thiab lub thawv thiab thinnest yeeb nkab nyob hauv tib lub qauv tsim. Nyob rau tib qho kev siv ntawm kev siv, kev ruaj ntseg coefficient ntawm yeeb nkab ntaub ntawv ntawm tib series ntawm phab ntsa thickness yog tus high. Yog li ntawd, rau PB yeeb nkab, nws yog qhov zoo heev thiab qhov zoo tshaj plaws kev xaiv yog tias nws yog saib raws li cov tub ntxhais cov yeeb nkab khoom ntawm geothermal zog.
