Isingeniso: Njengenye yepulasitiki ejwayelekile esetshenziswa kabanzi, i-PP ingabonakala yonke indawo empilweni yansuku zonke. Inokuhlanzeka okuphezulu kune-pc evamile. Nakuba ingenayo umbala ophezulu we-ABS, i-PP inokuhlanzeka okuphezulu kanye nokunikeza umbala. Embonini, izinto ze-PP zivame ukusetshenziswa ezintweni zokupakisha ezifanaamabhodlela epulasitiki, izivalo zamabhodlela, amabhodlela kakhilimu, njll. Ngihlungwe ngokwe-IPHAKHEJI LE-RBfuthi yabelwana ngayo nochungechunge lokuhlinzeka ngezinsizakalo ukuze kubhekwe kuzo:
Igama lamakhemikhali: i-Polypropylene
Igama lesiNgisi: I-Polypropylene (ebizwa ngokuthi i-PP)
I-PP iyi-polymer ekristali. Phakathi kwamapulasitiki asetshenziswa kakhulu, i-PP iyona elula kakhulu, enobukhulu obungu-0.91g/cm3 kuphela (ngaphansi kwamanzi). Phakathi kwamapulasitiki asetshenziswa kabanzi, i-PP inokumelana nokushisa okungcono kakhulu. Izinga lokushisa layo lokuphambuka kokushisa lingu-80-100°C futhi lingabiliswa emanzini abilayo. I-PP inokumelana okuhle kokuqhekeka kokucindezeleka kanye nokuphila isikhathi eside kokukhathala. Ivame ukwaziwa ngokuthi “ipulasitiki engu-100%. Ukusebenza okuphelele kwe-PP kungcono kunokwezinto ze-PE. Imikhiqizo ye-PP inesisindo esincane, ukuqina okuhle kanye nokumelana okuhle kwamakhemikhali.
Okubi nge-PP: ukunemba okuphansi kobukhulu, ukuqina okunganele, ukumelana nesimo sezulu okubi, kulula ukukhiqiza "umonakalo wethusi", inesimo sangemuva kokuncipha, ngemva kokudilika, kulula ukuguga, kube buthakathaka, futhi kube lula ukubuna.
01
Izici zokubumba
1) Izinto ezikristalu azinawo umbala ocacile futhi ziyakwazi ukuqhekeka, futhi kulula ukubola uma zithintana nensimbi eshisayo isikhathi eside.
2) Ukugeleza kuhle, kodwa ububanzi bokuncipha kanye nenani lokuncipha likhulu, futhi izimbobo zokuncipha, ukugoba, kanye nokuguquguquka kulula ukwenzeka.
3) Ijubane lokupholisa liyashesha, uhlelo lokuthulula kanye nohlelo lokupholisa kufanele kuqede ukushisa kancane kancane, futhi kunake ukulawula izinga lokushisa lokubumba. Izinga lokushisa lezinto ezibonakalayo kulula ukuliqondisa ekushiseni okuphansi kanye nokucindezela okuphezulu. Uma izinga lokushisa lokubumba lingaphansi kwama-degrees angu-50, ingxenye yepulasitiki ayibushelelezi, futhi kulula ukukhiqiza ukushisela okubi, izimpawu zokugeleza, Ithambekele ekugobeni nasekuguqukeni okungaphezu kwama-degrees angu-90
4) Ubukhulu bodonga lwepulasitiki kumele bufane ukuze kugwenywe ukuntuleka kweglue namakhona abukhali ukuze kuvinjelwe ukugxilisa ingqondo.
02
Izici zenqubo
I-PP inokuguquguquka okuhle ekushiseni kokuncibilika kanye nokusebenza kahle kokubumba. I-PP inezici ezimbili ekucutshungulweni
Okokuqala: I-viscosity yokuncibilika kwe-PP iyancipha kakhulu ngokwanda kwesilinganiso sokushefa (akuthintwa kangako yizinga lokushisa)
Okwesibili: Izinga lokuma kwama-molecule liphezulu futhi izinga lokuncishiswa liphezulu kakhulu.
Izinga lokushisa lokucubungula le-PP licishe libe ngu-200-300℃. Linokuqina okuhle kokushisa (izinga lokushisa lokubola lingu-310℃), kodwa uma lishisa kakhulu (270-300℃), lingase liwohloke uma lihlala emgqonyeni isikhathi eside. Ngenxa yokuthi i-viscosity ye-PP yehla kakhulu ngokwanda kwesivinini sokusika, ukucindezela komjovo okwandisiwe kanye nesivinini somjovo kuzokhulisa ukugeleza kwayo futhi kuthuthukise ukuguquguquka kokuncipha kanye nokucindezeleka. Izinga lokushisa lesikhunta kufanele lilawulwe ngaphakathi kwebanga elingu-30-50℃. Ukuncibilika kwe-PP kungadlula esikhaleni esincane kakhulu sesikhunta futhi kubonakale ngaphambili. Enqubweni yokuncibilika kwe-PP, kufanele kudonse inani elikhulu lokushisa kwe-fusion (ukushisa okukhulu), futhi umkhiqizo ushisa kakhulu ngemva kokukhishwa esikhumbeni. Izinto ze-PP azidingi ukomiswa ngesikhathi sokucubungula, futhi izinga lokuncipha kanye nokuqina kwe-PP kuphansi kune-PE.
03
Amaphuzu okufanele uwaqaphele ekucutshungulweni kwepulasitiki
Ukucubungula ipulasitiki
I-PP emsulwa imhlophe qhwa futhi ingadaywa ngemibala ehlukahlukene. I-PP ingadaywa kuphela nge-masterbatch yombala emishinini yokubumba ejwayelekile, kodwa amanye amamodeli anezinto ezizimele zokwenza ipulasitiki eziqinisa umphumela wokuxuba, futhi angadaywa nge-toner.
Imikhiqizo esetshenziswa ngaphandle ngokuvamile igcwele iziqinisi ze-UV kanye nomnyama wekhabhoni. Isilinganiso sokusetshenziswa kwezinto eziphinde zasetshenziswa akufanele sidlule u-15%, ngaphandle kwalokho kuzobangela ukwehla kwamandla kanye nokubola kanye nokushintsha kombala. Ngokuvamile, akukho ukwelashwa okukhethekile kokomisa okudingekayo ngaphambi kokucutshungulwa komjovo we-PP.
Ukukhetha umshini wokubumba umjovo
Azikho izidingo ezikhethekile zokukhetha imishini yokubumba ngomjovo. Ngoba i-PP inobukristali obuphezulu. Umshini wokubumba ngomjovo wekhompyutha onomfutho ophezulu wokubumba kanye nokulawula izigaba eziningi uyadingeka. Amandla okubopha ngokuvamile anqunywa yi-3800t/m2, kanti ivolumu yokubumba ingu-20%-85%.
Umklamo wesikhunta nesango
Izinga lokushisa lesikhunta lingu-50-90℃, kanti izinga lokushisa eliphezulu lesikhunta lisetshenziselwa izidingo zosayizi ophezulu. Izinga lokushisa eliyinhloko lingaphansi kuka-5℃ kunezinga lokushisa lesikhala, ububanzi bomgijimi bungu-4-7mm, ubude besango lenaliti bungu-1-1.5mm, kanti ububanzi bungaba buncane njengo-0.7mm.
Ubude besango lomphetho bufushane ngangokunokwenzeka, cishe ngu-0.7mm, ukujula kuyingxenye yobukhulu bodonga, kanti ububanzi buphindwe kabili ubukhulu bodonga, futhi kancane kancane kukhula ngobude bokugeleza kokuncibilika emgodini.
Isikhunta kumele sibe nokungena kahle komoya. Umgodi womoya ujule ngo-0.025mm-0.038mm futhi ubukhulu bungu-1.5mm. Ukuze ugweme izimpawu zokushwabana, sebenzisa ama-nozzle amakhulu nayindilinga kanye nezimbambo eziyindilinga, kanti ubukhulu bezimbambo kufanele bube buncane (Isibonelo, u-50-60% wobukhulu bodonga).
Ubukhulu bemikhiqizo eyenziwe nge-PP ye-homopolymer akufanele budlule u-3mm, ngaphandle kwalokho kuzoba namabhamuza (imikhiqizo yodonga olujiyile ingasebenzisa i-PP ye-copolymer kuphela).
Izinga lokushisa lokuncibilika
Iphuzu lokuncibilika kwe-PP lingu-160-175°C, kanti izinga lokushisa lokubola lingu-350°C, kodwa izinga lokushisa alikwazi ukudlula u-275°C ngesikhathi sokucubungula ngomjovo. Izinga lokushisa esigabeni sokuncibilika kungcono libe ngu-240°C.
Isivinini somjovo
Ukuze kuncishiswe ukucindezeleka kwangaphakathi kanye nokuguquka, kufanele kukhethwe umjovo wesivinini esikhulu, kodwa amanye amazinga e-PP kanye nezikhunta awafaneleki (amabhamuza nemigqa yomoya esivalweni somuntu). Uma ubuso obunamaphethini buvela ngemigqa ekhanyayo nemnyama esakazwa yisango, umjovo wesivinini esiphansi kanye nokushisa okuphezulu kwesikhunta kufanele kusetshenziswe.
Ncibilikisa ingcindezi yomhlane
Kungasetshenziswa ingcindezi yangemuva ye-glue glue engu-5bar, futhi ingcindezi yangemuva yezinto ze-toner ingalungiswa ngendlela efanele.
Umjovo kanye nokubamba ingcindezi
Sebenzisa ingcindezi ephezulu yokujova (1500-1800bar) kanye nengcindezi yokubamba (cishe u-80% wengcindezi yokujova). Shintshela ekucindezeleni kokubamba cishe ku-95% we-stroke ephelele, bese usebenzisa isikhathi eside sokubamba.
Ngemva kokucutshungulwa kwemikhiqizo
Ukuze kuvinjelwe ukushwabana nokuguquka okubangelwa ukuqiniswa kwe-post-crystallization, imikhiqizo ngokuvamile idinga ukucwiliswa emanzini ashisayo.
I-Shanghai Rainbow Industrial Co., Ltdungumenzi,Iphakheji yothingo lwaseShanghaiNikeza ukupakishwa kwezimonyo okukodwa. Uma uthanda imikhiqizo yethu, ungakwenzaXhumana nathi,
Iwebhusayithi:www.uthingo-pkg.com
I-imeyili:Bobby@rainbow-pkg.com
I-WhatsApp: +008613818823743
Isikhathi sokuthunyelwe: Okthoba-04-2021