Yam khoom raw li cas yuav tsum raug siv los tshuab moulding ntawm hollow tshuab moulding tais? Qhov kev ua tau zoo yog dab tsi?
High molecular luj high density polyethylene (hdpe) feem ntau yog siv raws li lub ntsiab raw raw hauv hollow tshuab molding disc. Nws tuaj yeem ntxiv 20% ~ 30% ntawm nws cov khoom siv rov ua dua ntxiv thiab ntxiv 1% ~ 2% tus xibfwb ua haujlwm raws li qhov sib txawv ntawm cov khoom.
Kev ua haujlwm ntawm HDPE tsuas yog nyob ntawm nws txoj kev sib npaug, sib ze molecular mass thiab txheeb ze molecular mass faib.Tus siab dua qhov ceev, qhov ntau dua lub rigidity thiab hardness ntawm cov khoom, lub zog muaj zog rau tshuaj corrosion; Ntau dua tus txheeb ze molecular phaus, polymer ndlwg, qhov zoo dua qhov toughness thiab ib puag ncig kev nyuaj siab cracking resistance.Lev tus faib rau molecular mass, lub dav ntawm qhov faib yuav ncaj qha mus rau tus nqi ntawm polymer ndlwg.
Tam sim no, lub HMWHDPE siv rau hauv cov tshuab tsis muaj hollow moulding yog tsim los ntawm ethylene polymerized nrog cov hlau hloov ua cov catalyst nyob hauv siab tsawg (0.31-0.48mpa) thiab tsawg kub (80-1i0cc). Nws yog feem ntau linear copolymer los yog homopolymer.Vim li cas HMWHDPE muaj cov kev cai rau txhua yam ntawm polymer hauv cov khoom tsim, tshwj xeeb tshaj yog nws siab molecular phaus, nws muaj zoo toughness thiab puag ncig kev nyuaj cracking tsis kam, thiab tuaj yeem tiv thaiv qhov corrosion ntawm ntau cov tshuaj.Muaj siab ntom muab cov khoom txaus rigidity thiab hardness.Ntxiv tas, nws txoj kab zauv feem sib npaug molecular loj tis tau txo qhov nyuaj ntawm siab molecular phaus polymers hauv ndlwg.