Isingeniso: Njengomunye we-plastitics ejwayelekile esetshenziswa kakhulu, i-pp ingabonakala yonke indawo empilweni yansuku zonke. Inobumsulwa obuphakeme kune-PC ejwayelekile. Yize ingenawo umbala ophakeme we-AB, i-PP inokuhlanzeka okuphezulu nokuhunyushwa kombala. Embonini, izinto ze-PP zivame ukusetshenziswa ezintweni zokupakisha ezifanaAmabhodlela epulasitiki, Amabhodlela amabhodlela, Amabhodlela ekhilimu, njll. Ngihlungwa nguIphakethe le-RBfuthi kwabelwane ngecala lokuhlinzekwa kwereferensi:
Igama Lamakhemikhali: I-Polypropylene
Igama lesiNgisi: I-PolyPropylene (Kubhekiselwe Ku-PP)
I-PP iyi-polymer ye-crystalline. Phakathi kwamapulasitiki asetshenziswa kaningi, i-PP idlani kakhulu, ngobuningi bama-0.91g / cm3 kuphela (ngaphansi kwamanzi). Phakathi kwama-plastistics anenjongo ejwayelekile, i-PP inokumelana okungcono kakhulu kokushisa. Izinga lokushisa layo lokushisa linge-80-100 ° C futhi lingabiliswa emanzini abilayo. I-PP inokuphikiswa okuhle kokuqhekeka kwengcindezi kanye nokuphila okuphezulu kokukhathala. Yaziwa kakhulu ngokuthi "100% Plastic". Ukusebenza okuphelele kwe-PP kungcono kunaleyo yezinto ezibonakalayo. Imikhiqizo ye-PP inesisindo esikhanyayo, ubulukhuni obuhle nokuphikiswa okuhle kwamakhemikhali.
Okubi kwe-PP: Ukunemba okuphezulu, ukuqina okungekho emthethweni, ukumelana kahle kwesimo sezulu, kulula ukukhiqiza "ukulimala kwethusi", kulula ukugeleza, kube lula ukudala, kube lula ukuzilimaza, futhi kulula ukumane, futhi kube lula ukuwohloka.
01
Izici Zokubumba
1) Indwangu ye-crystalline inenhlayiya ephansi futhi ithambekele ekunciphiseni ukuphazamiseka, futhi kulula ukubola ngokuxhumana kwesikhathi eside ngensimbi eshisayo.
2) Uketshezi luhle, kepha uhla lweShrinkage kanye nenani le-shrinkage likhulu, futhi izimbobo ze-shrinkage, ama-dents, kanye nokuguquguquka kulula ukwenzeka.
3) Ijubane elipholile liyashesha, uhlelo lokuthulula kanye nohlelo lokupholisa kufanele lunqabe ukushisa kancane kancane, futhi unake ukulawula amazinga okushisa okubumba. Izinga lokushisa lezinto ezibonakalayo kulula ukuqondiswa ekushiseni okuphansi kanye nengcindezi ephezulu. Lapho izinga lokushisa elibunjiwe liphansi kunama-degree angama-50, ingxenye yepulasitiki ayibushelelezi, futhi kulula ukukhiqiza ubuhlakani, amamaki okugeleza, athambekele ekuhlaselweni nasekuguqukeni okungenhla kwama-degrees angama-90
4) Ubukhulu obudongeni lwepulasitiki kumele bube umfaniswano ukugwema ukuntuleka kwe-glue namakhona abukhali ukuvimbela ukugxila kwengcindezi.
02
Inqubo yezimpawu
I-PP ine-fluidity enhle ekushiseni okuncibilikayo nokusebenza okuhle kokubumba. I-PP inezimpawu ezimbili ekucutshungweni
Eyokuqala: Ukubonakaliswa kwe-PP kuncibilike kuncipha kakhulu ekwandeni kwezinga le-shear (kuthinteka kancane ngamazinga okushisa)
Okwesibili: Izinga lokuqondiswa kwamangqamuzana liphezulu futhi izinga lokubulala ama-shrinkage liphezulu.
Izinga lokushisa le-PP lingama-200- 300 ℃. Inokuqina okuhle okushisayo (izinga lokushisa elikhombayo lingu-310 ℃), kepha ekushiseni okuphezulu (270-300 ℃), kungahle kulimaze uma kuhlala emgqonyeni isikhathi eside. Ngoba i-viscosity ye-PP yehla kakhulu ngokunyuka kwesivinini se-shear, ijubane lokudweba elikhulayo kanye nesivinini somjovo lizokhulisa uketshezi lwalo futhi luthuthukise ukuguquguquka nokudangala. Ukushisa okubumba kufanele kulawulwe ngaphakathi kwebanga lama-30-50 ℃. I-PP incibilika ingadlula igebe elincanyana kakhulu le-mold futhi livela ngaphambili. Enqubweni yokuncibilika ye-PP, kufanele ithole inani elikhulu lokushisa kokuthambisa (ukushisa okucashile), futhi umkhiqizo ushisa ngemuva kokukhishwa kusuka kusikhunta. Izinto ze-PP azidingi ukoma ngesikhathi sokucutshungulwa, futhi isilinganiso se-shrinkage kanye ne-crystaltaltity ye-PP ziphansi kunaleso.
03
Amaphuzu okufanele akwazi ukucubungula ngopulasitiki
Ukucubungula kwepulasitiki
I-PP ehlanzekile i-Translucent Impry White futhi ingadaywa ngemibala ehlukahlukene. I-PP ingadakwa kuphela nge-color masterbatch emishini ejwayelekile yokuhlanganisa imijovo, kepha amanye amamodeli anezinto ezizimele zokwenza ipulasitiki eziqinisa umphumela wokuxuba, futhi nazo zingadaywa nge-toner.
Imikhiqizo esetshenzisiwe ngaphandle ngokuvamile igcwele izitebele ze-UV nekhabhoni emnyama. Isilinganiso sokusebenzisa sezinto eziphindaphindwayo akufanele sidlule ku-15%, ngaphandle kwalokho kuzodala ukuthi ama-crop kanye nokubumbana nokubumbana. Ngokuvamile, akukho ukwelashwa okukhethekile okudingekayo ngaphambi kokucutshungulwa kwe-PP.
Ukukhethwa komshini wokubumba
Azikho izidingo ezikhethekile zokukhethwa kwemishini yokubumba yomjovo. Ngoba i-PP inekristali ephezulu. Umshini wokubumba umjovo we-computer onokucindezela okuphezulu komjovo kanye nokulawulwa kwesigaba esiningi kuyadingeka. Amandla okubambisa ngokuvamile anqunywa ngu-3800T / M2, futhi ivolumu yomjovo ingama-20% -85%.
I-Mold ne-Gate Design
Izinga lokushisa le-Main lingu-50-90 ℃, futhi izinga lokushisa eliphakeme lisetshenziselwa izidingo eziphezulu. Ukushisa okuyisisekelo kungaphezu kwama-5 ℃ aphansi kunokushisa kwe-cavity, ububanzi bomgijimi ngu-4-7mm, ubude besango lesango bungu-1-1.5mm, futhi ububanzi bungaba buncane njengo-0.7mm.
Ubude besango lomphetho bufushane ngangokunokwenzeka, cishe ngo-0.7mm, ukujula kwengxenye yobukhulu bodonga, futhi ububanzi bukhuphuka kabili ngobude bodonga, futhi kancane kancane luyakhuphuka ngobude bokugeleza kwe-cavity.
Isikhunta kufanele ube nokuphuma okuhle. I-Vent Hole yi-0.025mm-0.038mm ejulile kanye ne-1.5mm ubukhulu. Ukugwema amamaki acwebezelayo, sebenzisa ama-nozzle amakhulu futhi ayindilinga kanye nabagijimi besiyingi, futhi ubukhulu bezimbambo kufanele kube mncane (ngokwesibonelo, ama-50-60% odonga ubukhulu).
Ubukhulu bemikhiqizo elenziwe nge-Homopolymer PP akufanele lidlule ku-3mm, ngaphandle kwalokho kuzoba nama-bubble (imikhiqizo yodonga obukhulu ingasebenzisa kuphela i-Copolymer PP).
Ukulimala kokuncibilika
Iphoyinti elincibilikayo le-PP lingu-160-175 ° C, futhi izinga lokushisa elikhombayo lingama-350 ° C, kepha ukulungiswa kwamazinga okushisa ngeke kudlule ama-275 ° C ngesikhathi sokucutshungulwa komjovo. Izinga lokushisa esigabeni sokuncibilika kungcono u-240 ° C.
Isivinini somlingo
Ukuze unciphise ukucindezelwa kwangaphakathi kanye ne-defformation, umjovo wejubane eliphezulu kufanele ukhethwe, kepha amanye amabanga e-PP nezikhunta awafanele (ama-bubble kanye nemigqa yomoya ku-mantle yomuntu). Uma indawo ephethwe iphethini ivela ngemivimbo ekhanyayo futhi emnyama eshijwe yisango, umjovo wejubane eliphansi kanye nokushisa okuphezulu okuphezulu kufanele kusetshenziswe.
Ncibilikisa emuva ingcindezi
Ingcindezi ye-5Bar Melt Adhesive bangemuva ingasetshenziswa, futhi ingcindezi engemuva ye-toner impahla ingashintshwa ngendlela efanele.
Umjovo nokucindezela kubambe
Sebenzisa ingcindezi ephakeme yomjovo (1500-1800bar) nokubamba ingcindezi (cishe ama-80% wengcindezi yomjovo). Shintshela ekubambeni ingcindezi cishe ngo-95% wokushaywa unhlangothi ephelele, futhi usebenzise isikhathi eside sokubamba.
Ukusebenza ngemuva kwemikhiqizo
Ukuze uvikele i-shrinkage kanye ne-deformation okubangelwa yi-post-crystallization, imikhiqizo ngokuvamile idinga ukugcotshwa emanzini ashisayo.
I-Shanghai rainbow Industrial Co, Ltdungumkhiqizi,Iphakethe le-Shanghai RainbowAhlinzeke nge-cosmetic yokumisa izimonyo.Uma uthanda imikhiqizo yethu, ungakwaziXhumana nathi,
Iwebhusayithi:www.rainbow-pkg.com
I-imeyili:Bobby@rainbow-pkg.com
I-WhatsApp: +008613818823743
Isikhathi Sokuthumela: Oct-04-2021