Isingeniso: Njengenye yepulasitiki evamile esetshenziswa kabanzi, i-PP ingabonakala yonke indawo ekuphileni kwansuku zonke.Inobumsulwa obuphakeme kune-pc evamile.Yize ingenawo umbala ophezulu we-ABS, i-PP inokuhlanzeka okuphezulu nokunikezwa kombala.Embonini, impahla ye-PP ivame ukusetshenziswa ekupakisheni izinto ezifanaamabhodlela epulasitiki, amakepisi amabhodlela, amabhodlela okhilimu, njll. Ngihlungwe ngakhoI-RB PACKAGEfuthi kwabelwane nge-supply chain ukuze kusetshenziswe ireferensi:
Igama lekhemikhali: Polypropylene
Igama lesiNgisi: I-Polypropylene (okubhekiselwa kuyo njenge-PP)
I-PP iyi-polymer ecwebezelayo.Phakathi kwamapulasitiki asetshenziswa kakhulu, i-PP iyona elula kakhulu, enobuningi obungu-0.91g/cm3 kuphela (ngaphansi kwamanzi).Phakathi kwamapulasitiki anenhloso evamile, i-PP inokumelana nokushisa okungcono kakhulu.Ukushisa kwayo kokuphazamisa ukushisa kungu-80-100 ° C futhi kungabiliswa emanzini abilayo.I-PP inokumelana okuhle nokuqhekeka kwengcindezi nempilo yokukhathala ephezulu yokugoba.Kuvame ukubizwa ngokuthi "ipulasitiki eyi-100%.Ukusebenza okuphelele kwe-PP kungcono kunokokusebenza kwe-PE.Imikhiqizo ye-PP inesisindo esincane, ukuqina okuhle nokumelana okuhle kwamakhemikhali.
Ukungalungi kwe-PP: ukunemba okuphansi kwe-dimensional, ukuqina okunganele, ukumelana nesimo sezulu esingesihle, ukukhiqiza kalula "ukulimala kwethusi", kunesimo se-post-shrinkage, ngemva kokudilizwa, kulula ukuguga, kuba brittle, futhi kulula ukukhubazeka.
01
Izici zokubumba
I-1) I-crystalline material ine-hygroscopicity ephansi futhi ijwayele ukuncibilika ukuphuka, futhi kulula ukubola lapho uxhumane isikhathi eside nensimbi eshisayo.
2) I-fluidity yinhle, kodwa ububanzi bokuncipha kanye nenani lokuncipha kukhulu, futhi izimbobo ezinciphayo, ama-dents, kanye nokuguqulwa kulula ukwenzeka.
I-3) Ijubane lokupholisa liyashesha, isistimu yokuthulula kanye nesistimu yokupholisa kufanele ikhiphe kancane kancane ukushisa, futhi inake ukulawula izinga lokushisa lokubumba.Izinga lokushisa lezinto ezibonakalayo kulula ukuqondiswa ekushiseni okuphansi nokucindezela okukhulu.Lapho izinga lokushisa lesikhunta lingaphansi kwama-degree angu-50, ingxenye yepulasitiki ayibushelelezi, futhi kulula ukukhiqiza i-welding empofu, amamaki okugeleza, Ithambekele ekugwemeni nasekuguqukeni ngaphezu kwama-degree angama-90.
I-4) Ubukhulu bodonga lwepulasitiki kufanele bufane ukuze kugwenywe ukungabi khona kweglue namakhona abukhali ukuvimbela ukugxila kokucindezeleka.
02
Izici zenqubo
I-PP ine-fluidity enhle ekushiseni okuncibilikayo nokusebenza okuhle kokubumba.I-PP inezici ezimbili ekucutshungulweni
Okokuqala: I-viscosity ye-PP melt yehla kakhulu ngokunyuka kwezinga le-shear (elithintwa kancane izinga lokushisa)
Okwesibili: Izinga le-molecular orientation liphezulu futhi izinga lokuncipha liphezulu uma kuqhathaniswa.
Izinga lokushisa lokucubungula le-PP lizungeze i-200-300 ℃.Inokuqina okuhle kokushisa (izinga lokushisa lokubola lingu-310 ℃), kodwa ekushiseni okuphezulu (270-300℃), lingehlisa izinga uma lihlala emgqonyeni isikhathi eside.Ngenxa yokuthi i-viscosity ye-PP yehla kakhulu ngokunyuka kwejubane lokugunda, ukwanda kwengcindezi yomjovo kanye nesivinini somjovo kuzokhuphula uketshezi lwawo futhi kuthuthukise ukuwohloka kokuncipha nokucindezeleka.Ukushisa kwesikhunta kufanele kulawulwe ngaphakathi kwebanga lika-30-50 ℃.I-PP melt ingadlula esikhaleni sesikhunta esincane kakhulu futhi ivele ngaphambili.Enqubweni yokuncibilika kwe-PP, kufanele ibambe ukushisa okukhulu kwe-fusion (ukushisa okukhulu okuqondile), futhi umkhiqizo ushisa kakhulu ngemva kokukhishwa esikhunjini.Izinto ze-PP azidingi ukomiswa ngesikhathi sokucutshungulwa, futhi izinga lokuncipha kanye ne-crystallinity ye-PP iphansi kune-PE.
03
Amaphuzu okufanele uwaqaphele ekucutshungulweni kwepulasitiki
Ukucubungula kwepulasitiki
I-PP ehlanzekile inombala omhlophe wezinyo lendlovu futhi ingadaywa ngemibala ehlukahlukene.I-PP ingadaywa kuphela nge-masterbatch yombala emshinini wokubumba umjovo ojwayelekile, kodwa amanye amamodeli anezinto ezizimele ze-plasticizing eziqinisa umphumela wokuxutshwa, futhi angadaywa nge-toner.
Imikhiqizo esetshenziswa ngaphandle ivamise ukugcwaliswa ngama-UV stabilizer kanye ne-carbon black.Isilinganiso sokusetshenziswa kwezinto ezigaywe kabusha akufanele seqe u-15%, ngaphandle kwalokho kuzodala ukwehla kwamandla nokubola kanye nokuguquka kombala.Ngokuvamile, akukho ukwelashwa okukhethekile okomisa okudingekayo ngaphambi kokucubungula umjovo we-PP.
Ukukhetha umshini wokubumba umjovo
Azikho izidingo ezikhethekile zokukhethwa kwemishini yokubumba umjovo.Ngoba i-PP ine-crystallinity ephezulu.Kudingeka umshini wokubumba umjovo wekhompyutha onengcindezi ephezulu yomjovo kanye nokulawula okunezigaba eziningi.Amandla okubamba ngokuvamile anqunywa ngu-3800t/m2, futhi umthamo womjovo ungama-20% -85%.
Isikhunta kanye nomklamo wesango
Izinga lokushisa lesikhunta lingu-50-90 ℃, futhi izinga lokushisa eliphezulu lesikhunta lisetshenziselwa izidingo zosayizi ophezulu.Izinga lokushisa eliyisisekelo lingaphezu kuka-5 ℃ ngaphansi kwezinga lokushisa lomgodi, ububanzi bomgijimi bungu-4-7mm, ubude besango lenaliti bungu-1-1.5mm, kanti ububanzi bungaba buncane njengo-0.7mm.
Ubude besango elinqenqemeni bufushane ngangokunokwenzeka, cishe ngo-0.7mm, ukujula kuyingxenye yobukhulu bodonga, futhi ububanzi buphindwe kabili kodonga, futhi kancane kancane bukhula nobude bokugeleza kokuncibilika emgodini.
Isikhunta kufanele sibe nomoya omuhle.Imbobo yokukhipha umoya ingu-0.025mm-0.038mm ukujula nobukhulu obungu-1.5mm.Ukuze ugweme amamaki okunciphisa, sebenzisa ama-nozzles amakhulu futhi ayindilinga kanye nabagijimi abayindilinga, futhi ubukhulu bezimbambo kufanele bube buncane (Isibonelo, i-50-60% yobukhulu bodonga).
Ubukhulu bemikhiqizo eyenziwe nge-homopolymer PP akufanele budlule u-3mm, ngaphandle kwalokho kuzoba nama-bubbles (imikhiqizo yodonga oluqinile ingasebenzisa i-copolymer PP kuphela).
Izinga lokushisa elincibilikayo
Iphuzu elincibilikayo le-PP liyi-160-175 ° C, futhi izinga lokushisa lokubola liyi-350 ° C, kodwa ukulungiselelwa kwezinga lokushisa akukwazi ukudlula i-275 ° C ngesikhathi sokucubungula umjovo.Izinga lokushisa endaweni encibilikayo lingcono kakhulu libe ngu-240°C.
Isivinini sokujova
Ukuze kuncishiswe ukucindezeleka kwangaphakathi kanye nokuguqulwa, umjovo wejubane eliphezulu kufanele ukhethwe, kodwa amanye amamaki e-PP kanye nokubunjwa akufanelekile (ama-bubbles nemigqa yomoya emgqonyeni womuntu).Uma indawo enephethini ibonakala inemigqa ekhanyayo nemnyama ehlakazwe yisango, umjovo wejubane eliphansi kanye nezinga lokushisa eliphakeme lokukhunta kufanele lisetshenziswe.
Melt back pressure
I-5bar melt adhesive back pressure ingasetshenziswa, futhi ingcindezi yangemuva yezinto ze-toner ingalungiswa ngendlela efanele.
Umjovo nokubamba ingcindezi
Sebenzisa ingcindezi yomjovo ephezulu (1500-1800bar) nokubamba ingcindezi (cishe ama-80% womjovo).Shintshela ekubambeni ingcindezi cishe ku-95% we-stroke egcwele, futhi usebenzise isikhathi eside sokubamba.
Ngemuva kokucubungula imikhiqizo
Ukuze uvimbele ukuncipha kanye nokuguqulwa okubangelwa i-post-crystallization, imikhiqizo ngokuvamile idinga ukucwiliswa emanzini ashisayo.
I-Shanghai Rainbow Industrial Co., Ltdumkhiqizi,Shanghai rainbow iphaketheNikeza ngephakheji yezimonyo eyodwa-stop.Uma uthanda imikhiqizo yethu, ungaXhumana nathi,
Iwebhusayithi:www.rainbow-pkg.com
I-imeyili:Bobby@rainbow-pkg.com
WhatsApp: +008613818823743
Isikhathi sokuthumela: Oct-04-2021