PP polypropylene
Yakajairika application range:
Indasitiri yemotokari (kunyanya kushandisa PP ine simbi yekuwedzera: madhaka, madhaidhi emhepo, mafeni, nezvimwewo), midziyo (yekugezesa magonhi edhishi, dryer ventilation ducts, washing machine mafuremu uye zvivharo, firiji gonhi remagetsi, nezvimwewo), Japan Shandisa zvinhu zvevatengi ( lawn nebindu midziyo yakadai
Vanocheka uswa uye vanomwaya mvura, nezvimwewo).
Injection mold process mamiriro:
Kuomesa mishonga: Kana yakachengetedzwa zvakanaka, hapana mushonga wekuomesa unodiwa.
Kunyunguduka tembiricha: 220 ~ 275 ℃, chenjerera kusapfuudza 275 ℃.
Mold tembiricha: 40 ~ 80 ℃, 50 ℃ inokurudzirwa.Iyo dhigirii yecrystallization inonyanya kutsanangurwa nekushisa kwe mold.
Jekiseni pressure: kusvika 1800bar.
Injection speed: Kazhinji, kushandiswa kwejekiseni yepamusoro-soro kunogona kuderedza kudzvinyirira kwemukati kune zvishoma.Kana pane kukanganisa pamusoro pechigadzirwa, jekiseni yakaderera-speed pane imwe tembiricha yepamusoro inofanira kushandiswa.
Vanomhanya nemasuwo: Kune vanotonhora vanomhanya, yakajairika mumhanyi dhayamita renji ndeye 4 ~ 7mm.Inokurudzirwa kushandisa denderedzwa jekiseni chiteshi uye mumhanyi.Mhando dzose dzemagedhi dzinogona kushandiswa.Iyo yakajairika gedhi dhayamita inotangira pa1 kusvika 1.5mm, asi masuwo madiki se 0.7mm anogona zvakare kushandiswa.Kumagedhi emupendero, kudzika kwegedhi shoma kunofanira kuva hafu yemadziro emadziro;hupamhi hwegedhi hudiki hunofanirwa kunge hwakapetwa kaviri kukora kwemadziro.PP zvinhu zvinogona kushandisa inopisa mumhanyi system.
Kemikari uye zvinhu zvemuviri:
PP ndeye semi-crystalline zvinhu.Iyo yakaoma kupfuura PE uye ine nzvimbo yakakwira yekunyungudika.Sezvo homopolymer PP ine brittle zvakanyanya kana tembiricha yakakwira kupfuura 0 ° C, zvinhu zvakawanda zvekutengesa zvePP zvinongori macopolymers ane 1 kusvika 4% ethylene kana clamp copolymers ane ethylene yemukati.Copolymer PP zvinhu zvine tembiricha yakadzika yekukanganisa (100 ° C), kujeka kwakaderera, kupenya kwakadzika, kusimba kwakadzika, asi ine simba rakasimba rekuita.Simba rePP rinowedzera nekuwedzera kwe ethylene content.Iyo Vicat inopfavisa tembiricha yePP ndeye 150 ° C.Nekuda kweiyo yakakwira crystallinity, iyo yepamusoro kuomarara uye kukwenya kuramba kwechinhu ichi zvakanaka kwazvo.PP haina dambudziko rekunetseka kwezvakatipoteredza kupaza.Kazhinji, iyo PP inogadziridzwa nekuwedzera girazi fiber, simbi yekuwedzera kana thermoplastic rabha.Kuyerera kweMFR yePP inotangira kubva ku1 kusvika ku40. PP zvinhu zvine MFR yakaderera zvine zvirinani kukanganisa kupikisa asi kuderera kwesimba rekurebesa.Kune zvigadzirwa zvine MFR imwechete, kusimba kweiyo copolymer mhando yakakwirira kupfuura iyo yemhando yehomopolymer.Nekuda kwekristaro, iyo shrinkage rate yePP yakanyanya kukwirira, kazhinji 1.8 ~ 2.5%.Uye iyo dhizaini yakafanana ye shrinkage iri nani kupfuura iyo yePE-HD uye zvimwe zvinhu.Kuwedzera 30% yegirazi zvinowedzera zvinogona kuderedza shrinkage kusvika 0.7%.Zvese zviri zviviri homopolymer uye copolymer PP zvinhu zvine yakanakisa mwando kunyudza, asidhi uye alkali corrosion kuramba, uye solubility kuramba.Zvisinei, haina kupikisa kunhuhwirira kwema hydrocarbons (akadai sebenzene) solvents, chlorinated hydrocarbons (carbon tetrachloride) solvents, etc. PP haina oxidation resistance pakupisa kwakanyanya sePE.

Yeduzvipunu zvepurasitiki, epurasitiki test tubes, nasal inhalersuye zvimwe zvigadzirwa zvinosangana nemuviri wemunhu zvinoshandisa PP zvinhu.Tine zvekurapa giredhi PP zvinhu uye chikafu giredhi PP zvinhu.Nekuti PP zvinhu hazvina chepfu.