I-polypropylene ye-PP
Uluhlu oluqhelekileyo lwesicelo:
Ishishini leemoto (ngokuyintloko kusetyenziswa izongezo zesinyithi eziqulethe i-PP: izikhuselo zodaka, imibhobho yomoya, iifeni, njl.njl.), izixhobo (ii-liner zomnyango wokuhlamba izitya, imibhobho yomoya yokomisa, iifreyimu kunye nezigqubuthelo zomatshini wokuhlamba, imibhobho yomnyango wefriji, njl.njl.), eJapan Sebenzisa iimpahla zabathengi (izixhobo zengca kunye negadi ezifana
Izixhobo zokusika ingca kunye nezixhobo zokufafaza, njl.njl.).
Iimeko zenkqubo yokubumba ngenaliti:
Unyango lokomisa: Ukuba igcinwe kakuhle, akukho nyango lokomisa olufunekayo.
Ubushushu bokunyibilika: 220~275℃, lumka ungadluli kwi-275℃.
Ubushushu bomngundo: 40~80℃, 50℃ buyacetyiswa. Ubungakanani bokukristala buxhomekeke kakhulu kubushushu bomngundo.
Uxinzelelo lwenaliti: ukuya kuthi ga kwi-1800bar.
Isantya sokujova: Ngokubanzi, ukusetyenziswa kwenaliti ekhawulezayo kunokunciphisa uxinzelelo lwangaphakathi lube ncinci. Ukuba kukho iziphene kumphezulu wemveliso, kufuneka kusetyenziswe inaliti ekhawulezayo kubushushu obuphezulu.
IiRunners kunye neeGates: Kwiimbaleki ezibandayo, uluhlu oluqhelekileyo lobubanzi bembaleki yi-4 ~ 7mm. Kucetyiswa ukusebenzisa i-injection port kunye ne-runner ejikelezayo. Zonke iintlobo zamasango zingasetyenziswa. Ububanzi besango obuqhelekileyo buqala kwi-1 ukuya kwi-1.5mm, kodwa ii-gates ezincinci njenge-0.7mm nazo zingasetyenziswa. Kwiimbaleki ezisemaphethelweni, ubunzulu besango obuncinci kufuneka bube sisiqingatha sobukhulu bodonga; ububanzi besango obuncinci kufuneka bube kabini ubuncinane bobukhulu bodonga. Izinto ze-PP zingasebenzisa inkqubo yembaleki eshushu.
Iimpawu zekhemikhali kunye nezomzimba:
I-PP yinto engathi yi-semi-crystalline. Inzima kune-PE kwaye ineqondo lokunyibilika eliphezulu. Ekubeni i-homopolymer PP ibuthathaka kakhulu xa ubushushu buphezulu kune-0°C, izinto ezininzi ze-PP zorhwebo ziyi-copolymers ezingacwangciswanga ezine-ethylene eyi-1 ukuya kwi-4% okanye ii-clamp copolymers ezinomxholo ophezulu we-ethylene. Izinto ze-Copolymer PP zinobushushu obuphantsi bokujika kobushushu (100°C), ukukhanya okuphantsi, ukukhanya okuphantsi, ukuqina okuphantsi, kodwa zinamandla anamandla okuchaphazela. Amandla e-PP ayanda ngokunyuka komxholo we-ethylene. Ubushushu bokuthambisa be-Vicat be-PP yi-150°C. Ngenxa ye-crystallinity ephezulu, ukuqina komphezulu kunye nokumelana nokukrwela kwesi sixhobo kulungile kakhulu. I-PP ayinangxaki yokuqhekeka koxinzelelo lokusingqongileyo. Ngokwesiqhelo, i-PP iguqulwa ngokongeza i-glass fiber, izongezo zesinyithi okanye irabha ye-thermoplastic. I-flow rate MFR ye-PP isusela kwi-1 ukuya kwi-40. Izinto ze-PP ezine-MFR ephantsi zinokumelana okungcono kokuchaphazela kodwa amandla aphantsi okuphakama. Kwizinto ezine-MFR efanayo, amandla ohlobo lwe-copolymer aphezulu kunalawo ohlobo lwe-homopolymer. Ngenxa yokwakheka kwekristale, izinga lokuncipha kwePP liphezulu kakhulu, ngokubanzi yi-1.8 ~ 2.5%. Kwaye ukufana kwendlela yokuncipha kungcono kakhulu kune-PE-HD nezinye izinto. Ukongeza i-30% yezongezo zeglasi kunokunciphisa ukuncipha ukuya kwi-0.7%. Zombini izinto ze-homopolymer kunye ne-copolymer PP zinokumelana nokufuma okuhle kakhulu, ukumelana nokugqwala kwe-asidi kunye ne-alkali, kunye nokumelana nokunyibilika. Nangona kunjalo, ayinakumelana ne-aromatic hydrocarbons (ezifana ne-benzene) solvents, chlorinated hydrocarbons (carbon tetrachloride) solvents, njl. I-PP ayinakumelana ne-oxidation kumaqondo obushushu aphezulu njenge-PE.

Zethuiicephe zeplastiki, iityhubhu zovavanyo zeplastiki, ii-inhaler zempumlokunye nezinye iimveliso ezidibana nomzimba womntu zisebenzisa izinto zePP. Sinezixhobo zePP zenqanaba lezonyango kunye nezinto zePP zenqanaba lokutya. Kuba izinto zePP azinatyhefu.