Makhalidwe a mphira wa nitrile ndi mphira wa EPDM komanso mtundu wa payipi ya rabara

1. mphira wa nitrile
Labala ya nitrile imagwiritsidwa ntchito makamaka popanga zinthu za rabala zosagwira mafuta.NBR mwachidule, mphira wopangidwa ndi copolymerizing butadiene ndi acrylonitrile.Ndi mphira wopangidwa ndi mafuta abwino (makamaka alkane mafuta) komanso kukana kukalamba.
Nitrile mphira amapangidwa ndi emulsion polymerization wa butadiene ndi acrylonitrile.Nitrile mphira makamaka opangidwa ndi otsika kutentha emulsion polymerization.Ili ndi kukana kwambiri kwamafuta, kukana kwambiri kuvala, kukana kutentha kwabwino komanso kumamatira mwamphamvu..
Zoyipa zake ndi kusakanizidwa bwino kwa kutentha, kutsika kwa ozoni, kusagwira bwino ntchito kwa insulation, komanso kutsika pang'ono.Itha kugwiritsidwa ntchito kwa nthawi yayitali mumlengalenga pa 120 ° C kapena mumafuta pa 150 ° C.
Kuphatikiza apo, ilinso ndi kukana madzi abwino, kuthina kwa mpweya komanso magwiridwe antchito abwino kwambiri, ndipo imagwiritsidwa ntchito kwambiri popanga zinthu zosiyanasiyana za rabara zosagwira mafuta.

2. mphira wa EPDM
EPDM rabara ndi yopanda polar, yodzaza.Zomwe zimatchedwa "non-polar" zikutanthauza kuti mamolekyu omwe amapanga polima alibe magulu a polar.Zomwe zimatchedwa "saturation" zikutanthauza kuti mamolekyu omwe amapanga polima alibe zomangira ziwiri.
EPDM (ethylene propylene diene monomer), monga mtundu wa mphira wokhala ndi elasticity yabwino, kuvala kukana, kukana kutentha, kukana kwa nyengo, kukana kwa ozoni, madzi abwino ndi madzi a m'nyanja, wakhala akugwiritsidwa ntchito kwambiri muzinthu za rabara zamagalimoto.

3. Momwe mungadziwire ngati payipi ya rabara ndi yabwino kapena yoyipa?
Yang'anani pamwamba pa payipi ya rabara: Nthawi zambiri pamakhala mitundu iwiri ya mphira, pamwamba yosalala ndi pamwamba pa nsalu.Malo osalala amafunikira malo osalala opanda thovu ndi ma protrusions;mawonekedwe opangidwa amafunikira kuti nsalu yozungulira ikhale yosalala komanso pamtunda womwewo.
Yang'anani pazitsulo zowonjezera: zowonjezera zowonjezera nthawi zambiri zimazunguliridwa ndi ulusi ndi mawaya achitsulo.Zigawo zochulukira, kupanikizika kwakukulu komwe kumalandira, chomwe ndi cholinga chofunikira pakusankhana.
Yang'anani ngati payipi ya rabara ndi yozungulira: nthawi zonse, chubu cha rabara chimakhala chozungulira bwino.Ngati ndi elliptical kapena osati bwalo langwiro, zingakhudze kugwiritsa ntchito chubu la rabara.
Yang'anani momwe payipi ya mphira imapindika: pindani pakati, pendani utoto wapamtunda ndi liwiro lobwereranso, kusintha kwamtundu kumakhala kochepa, komanso kuthamanga kwa payipi kumakhala kofulumira, zomwe zimatsimikizira kuti payipiyo ndi yabwino.