- Rau qhov ntsuas kub ntawm qhov pom,polypropylene tshav kub tsis kam yog siab tshaj polyethylene.Polypropylene melting kub yog li 40% -50% siab dua polyethylene, txog 160-170 ℃, yog li cov khoom tuaj yeem ua kom tsis muaj menyuam ntawm ntau tshaj 100 ℃, tsis muaj kev quab yuam sab nraud.PP hlua 150 ℃ tsis deformed.Polypropylene yog cim los ntawm qis ceev, siab dua cov khoom siv cov khoom siv rau polyethylene thiab zoo tshaj plaws rigidity.
- Rau qhov kev xav ntawm qhov ntsuas kub tsis zoo, qhov kub tsis kam ntawm polypropylene tsis muaj zog dua li polyethylene, 0 ℃ cuam tshuam lub zog tsuas yog ib nrab ntawm 20 ℃, thiab polyethylene brittle kub feem ntau tuaj yeem ncav cuag -50 ℃ hauv qab no;Nrog rau qhov nce ntawm cov txheeb ze molecular hnyav, qhov tsawg kawg nkaus tuaj yeem ncav cuag -140 ℃.Yog li ntawd,yog tias cov khoom yuav tsum tau siv nyob rau hauv qhov kub thiab txias ib puag ncig, los yogkom deb li deb tau xaiv polyethylene ua raw khoom.
- Rau qhov kev xav ntawm kev laus tiv thaiv, kev laus tiv thaiv ntawm polypropylene tsis muaj zog dua li ntawm polyethylene.Polypropylene muaj cov qauv zoo sib xws rau polyethylene, tab sis vim tias nws muaj cov saw hlau sab hauv tsim los ntawm methyl, nws yooj yim dua rau oxidized thiab degraded nyob rau hauv qhov kev txiav txim ntawm ULTRAVIOLET lub teeb thiab kub lub zog.Feem ntau cov khoom siv polypropylene uas yooj yim rau hnub nyoog hauv lub neej niaj hnub yog cov hnab ntim khoom, uas yooj yim tawg thaum raug tshav ntuj ntev ntev.Qhov tseeb, polyethylene aging kuj yog siab dua polypropylene, tab sis piv nrog lwm cov ntaub ntawv raw, nws qhov kev ua tau zoo tsis zoo heev, vim tias muaj tsawg tsawg ntawm ob daim ntawv cog lus thiab ether bonds hauv polyethylene molecules, nws cov huab cua tsis zoo, hnub ci, nag kuj yuav ua rau kev laus.
- Rau qhov kev xav ntawm kev hloov pauv, txawm hais tias polypropylene muaj lub zog siab, nws qhov kev hloov pauv tsis zoo, uas tseem tsis zoo cuam tshuam los ntawm kev pom.
Post lub sij hawm: Feb-28-2022