1. Cov khoom siv cua sov yog siv rau lub caij ntuj no nyob rau sab qaum teb kuv lub teb chaws, thiab qhov nruab nrab kub yog qis. Nws yog ib hom kev sib pauv cua sov ntawm huab cua thiab cua sov los ntawm qhov chaw sov thiab cua sov nruab nrab, yog li ua kom sov hauv chav tsev. Cov khoom siv cua sov feem ntau siv nyob rau sab qaum teb yog cov kav dej. Thawj qhov yuav tsum tau ua yog tias cov kav dej yuav khov rau hauv qhov chaw uas qhov kub thiab txias qis dua 0 degrees Celsius thaum lub caij ntuj no. Cias muab, cua sov yog ib qho kev pabcuam ntxiv, qhov xav tau dej los ntawm cov neeg nyob hauv nroog.
2. PPR yog ib yam muaj zog toughness, siab zog, siab ua yield, kub creep kuj, siab transparency thiab thiaj li nyob. Siv dav hauv kev tsim cov kav dej, cov ntawv txheeb, cov khoom siv niaj hnub, cov khoom ntim khoom, cov khoom siv hauv tsev, ntau hom yeeb yaj kiab, thiab lwm yam. PP-R yeeb nkab, tseem hu ua peb hom polypropylene yeeb nkab, random copolymerized polypropylene, yog random copolymerized polypropylene. extrusion yeeb nkab, uas tuaj yeem raug txhaj tshuaj molded.
3. PB kav dej yog siab molecular hnyav inert polymers. PB resin yog ib qho polymer complex synthesized los ntawm 1-butene ua raw khoom. Nws yog ib qho siv lead ua uas muaj qhov tshwj xeeb ntom ntom (0.937) thiab lub cev hloov pauv hloov pauv hloov pauv. Nws yog cov khoom siv high-tech teej tug mus rau qeb ntawm cov khoom siv tshuaj organic. Nws muaj qhov kub thiab txias tsis kam, ua haujlwm ntev, tshuaj lom neeg ruaj khov thiab yas, nws tsis muaj ntxhiab, tsis muaj tshuaj lom thiab tsis qab.