PP polypropylene
Uluhlu oluqhelekileyo lwesicelo:
Ushishino lweemoto (ikakhulukazi kusetyenziswa i-PP equlethe izongezo zetsimbi: i-mudguards, imigudu yokungenisa umoya, iifeni, njl.), izixhobo zombane (i-dishwasher door liners, dryer ventilation ducts, iifreyimu zoomatshini bokuhlamba kunye nezigqubuthelo, iilayini zeminyango yefriji, njl.), eJapan Sebenzisa iimpahla zabathengi ( ingca kunye nezixhobo zegadi ezifana
Oomatshini bokucheba ingca kunye nezitshizi, njl njl.).
Iimeko zenkqubo yokutofa ngundo:
Ukomisa unyango: Ukuba igcinwe ngokufanelekileyo, akukho nyango lokomisa olufunekayo.
Ubushushu obunyibilikayo: 220 ~ 275 ℃, lumka ungagqithi kuma-275 ℃.
Iqondo lobushushu lokungunda: 40 ~ 80℃, 50℃ liyacetyiswa.Iqondo le-crystallization limiselwa ikakhulu ngubushushu bokubumba.
Uxinzelelo lokutofa: ukuya kuthi ga kwi-1800bar.
Isantya se-injection: Ngokuqhelekileyo, ukusetyenziswa kwe-injection yesantya esiphezulu kunokunciphisa uxinzelelo lwangaphakathi kuncinci.Ukuba kukho iziphene kumphezulu wemveliso, inaliti ephantsi kwesantya esiphezulu kufuneka isetyenziswe.
Iimbaleki kunye namasango: Kwiimbaleki ezibandayo, uluhlu lwe-diameter yembaleki eqhelekileyo yi-4 ~ 7mm.Kucetyiswa ukuba usebenzise i-injection ye-circular injection port kunye nomgijimi.Zonke iintlobo zamasango zingasetyenziswa.Ubukhulu besango obuqhelekileyo buqala kwi-1 ukuya kwi-1.5mm, kodwa amasango amancinci njenge-0.7mm nawo anokusetyenziswa.Kumasango asemacaleni, ubunzulu besango elincinci kufuneka libe sisiqingatha sodonga;ubuncinci besango ububanzi kufuneka buphindwe kabini ubukhulu bodonga.Izinto zePP zinokusebenzisa inkqubo yembaleki eshushu.
Iimpawu zeMichiza kunye nezomzimba:
I-PP yimathiriyeli ye-semi-crystalline.Inzima kune-PE kwaye inendawo ephezulu yokunyibilika.Ekubeni i-homopolymer PP i-brittle kakhulu xa iqondo lokushisa lingaphezulu kwe-0 ° C, izinto ezininzi ze-PP zorhwebo zi-copolymers ezingahleliwe kunye ne-1 ukuya kwi-4% ye-ethylene okanye i-copolymers ye-clamp enomxholo ophezulu we-ethylene.I-Copolymer PP imathiriyeli inobushushu obuphantsi bokuphazamiseka kwe-thermal (100 ° C), ukukhanya okuphantsi, iglosi ephantsi, ubulukhuni obuphantsi, kodwa inamandla empembelelo enamandla.Amandla e-PP ayanda ngokunyuka komxholo we-ethylene.Iqondo lokushisa lokuthambisa iVicat lePP yi-150°C.Ngenxa ye-crystallinity ephezulu, ukuqina komphezulu kunye nokumelana nokukrazula kwesi sixhobo kuhle kakhulu.I-PP ayinayo ingxaki yoxinzelelo lokusingqongileyo.Ngokuqhelekileyo, i-PP iguqulwa ngokongeza i-fiber yeglasi, izongezo zetsimbi okanye irabha ye-thermoplastic.Izinga lokuhamba kwe-MFR ye-PP isuka kwi-1 ukuya kwi-40. Izinto ze-PP ezine-MFR eziphantsi zinokuchasana kwempembelelo engcono kodwa amandla okwandisa aphantsi.Kwizinto eziphathekayo ezine-MFR efanayo, amandla ohlobo lwe-copolymer aphezulu kunohlobo lwe-homopolymer.Ngenxa yecrystallization, izinga lokucutheka kwePP liphezulu kakhulu, ngokubanzi 1.8 ~ 2.5%.Kwaye isalathiso sokufana kwe-shrinkage singcono kakhulu kune-PE-HD kunye nezinye izinto.Ukongeza i-30% yezongezo zeglasi kunokunciphisa ukucutheka ukuya kwi-0.7%.Zombini izixhobo ze-homopolymer kunye ne-copolymer PP zinokufunxa okugqwesileyo kokufuma, i-asidi kunye nokumelana nokubola kwe-alkali, kunye nokumelana nokunyibilika.Nangona kunjalo, ayinakumelana ne-aromatics hydrocarbons (ezifana ne-benzene) izinyibilikisi, i-chlorinated hydrocarbons (carbon tetrachloride) izinyibilikisi, njl njl. I-PP ayinayo ukumelana ne-oxidation kumaqondo aphezulu afana ne-PE.

Yethuamacephe eplastiki, iityhubhu zovavanyo zeplastiki, inhalers ngeempumlokunye nezinye iimveliso ezidibana nomzimba womntu zisebenzisa izinto zePP.Sinezixhobo ze-PP zebakala lezonyango kunye nebakala lokutya lezinto zePP.Ngenxa yokuba izinto zePP azinatyhefu.