Intshayelelo: Njengenye yeplastiki esetyenziswa kakhulu, i-PP inokubonwa kuyo yonke indawo kubomi bemihla ngemihla. Icocekile kakhulu kune-pc eqhelekileyo. Nangona ingenambala uphezulu we-ABS, i-PP icocekile kakhulu kwaye inombala ubonakala uphezulu. Kushishino, izinto ze-PP zihlala zisetyenziswa kwizinto zokupakisha ezifanaiibhotile zeplastiki, izivalo zebhotile, iibhotile zekhrimu, njl. Ndihlelwe ngokweIPHAKEJI YE-RBkwaye kwabelwana ngayo necandelo lobonelelo ngeenkcukacha:
Igama lekhemikhali: iPolypropylene
Igama lesiNgesi: iPolypropylene (ebizwa ngokuba yiPP)
I-PP yi-crystalline polymer. Phakathi kweeplastiki ezisetyenziswa kakhulu, i-PP yeyona ilula, inobunzima obuyi-0.91g/cm3 kuphela (ngaphantsi kwamanzi). Phakathi kweeplastiki ezisetyenziswa ngokubanzi, i-PP inokumelana nobushushu okungcono. Ubushushu bayo bokujika kobushushu buyi-80-100°C kwaye inokubiliswa emanzini abilayo. I-PP inokumelana okuhle nokuqhekeka koxinzelelo kunye nokuhlala ixesha elide lokudinwa. Yaziwa ngokuba yi-"100% plastic". Ukusebenza okupheleleyo kwe-PP kungcono kunokwezinto ze-PE. Iimveliso ze-PP zinobunzima obuphantsi, ukuqina okuhle kunye nokumelana okuhle kweekhemikhali.
Izinto ezingalunganga nge-PP: ukuchaneka okuphantsi kobukhulu, ukuqina okunganelanga, ukumelana nemozulu embi, kulula ukuvelisa "umonakalo wobhedu", inento eyenzekayo emva kokuncipha, emva kokuqhekeka, kulula ukuguga, kuba buthathaka, kwaye kulula ukuyitshintsha.
01
Iimpawu zokubumba
1) Izinto ezikristali azina-hygroscopicity ininzi kwaye zinokwaphuka kancinci, kwaye kulula ukubola xa zidibene nesinyithi esishushu ixesha elide.
2) Ukutyibilika kuhle, kodwa uluhlu lokuncitshiswa kunye nexabiso lokuncitshiswa likhulu, kwaye imingxunya yokuncitshiswa, ukuqhekeka, kunye nokuguquguquka kulula ukwenzeka.
3) Isantya sokupholisa siyakhawuleza, inkqubo yokuthulula kunye nenkqubo yokupholisa kufuneka zikhuphe ubushushu kancinci kancinci, kwaye zinike ingqalelo ekulawuleni ubushushu bokubumba. Ubushushu bezinto kulula ukubujonga kubushushu obuphantsi kunye noxinzelelo oluphezulu. Xa ubushushu bokubumba bungaphantsi kwama-50 degrees, inxalenye yeplastiki ayigudi, kwaye kulula ukuvelisa ukuwelda okubi, iimpawu zokuhamba, Inokugoba kunye nokuguquguquka okungaphezulu kwama-90 degrees.
4) Ubukhulu bodonga lweplastiki kufuneka bufane ukuze kuthintelwe ukungabikho kweglu kunye neekona ezibukhali ukuthintela uxinzelelo.
02
Iimpawu zenkqubo
I-PP iyakwazi ukunyibilika kakuhle xa kushushu kwaye isebenza kakuhle xa kusenziwa i-molding. I-PP ineempawu ezimbini xa kusetyenzwa
Okokuqala: Ubuninzi be-PP melt buyehla kakhulu xa isantya sokucheba sinyuka (ayichaphazeleki kakhulu bubushushu)
Okwesibini: Umgangatho wokujonga iimolekyuli uphezulu kwaye izinga lokuncipha liphezulu.
Ubushushu bokucubungula be-PP bumalunga ne-200-300℃. Izinzile kakuhle kubushushu (ubushushu bokubola buyi-310℃), kodwa kubushushu obuphezulu (270-300℃), inokwehla ukuba ihlala kwibhareli ixesha elide. Ngenxa yokuba i-viscosity ye-PP iyancipha kakhulu ngokwanda kwesantya sokucheba, ukunyuka koxinzelelo lwe-injection kunye nesantya se-injection kuya kwandisa ukugeleza kwayo kwaye kuphucule ukuguquguquka kokuncipha kunye nokudodobala. Ubushushu be-mold kufuneka bulawulwe ngaphakathi koluhlu lwe-30-50℃. I-PP melt ingadlula kumsantsa omncinci kakhulu we-mold kwaye ibonakale ngaphambili. Kwinkqubo yokunyibilika kwe-PP, kufuneka ifunxe ubushushu obukhulu be-fusion (ubushushu obukhulu), kwaye imveliso ishushu ngakumbi emva kokuba ikhutshwe kwi-mold. Izinto ze-PP akufuneki zomiswe ngexesha lokucubungula, kwaye izinga lokuncipha kunye ne-crystallinity ye-PP ziphantsi kune-PE.
03
Amanqaku ekufuneka aqatshelwe xa kusenziwa iplastiki
Ukucubungula iplastiki
I-PP ecocekileyo imhlophe nge-ivory kwaye ingadaywa ngemibala eyahlukeneyo. I-PP ingadaywa kuphela nge-color masterbatch kwiimashini zokubumba i-injection eziqhelekileyo, kodwa ezinye iimodeli zinezinto ezizimeleyo zeplastiki eziqinisa isiphumo sokuxuba, kwaye zinokudaywa nge-toner.
Iimveliso ezisetyenziswa ngaphandle zihlala zizaliswe ziziqinisi ze-UV kunye nomnyama wekhabhoni. Umlinganiselo wokusetyenziswa kwezinto ezisetyenzisiweyo akufuneki udlule kwi-15%, kungenjalo kuya kubangela ukwehla kwamandla kunye nokubola kunye nokutshintsha kombala. Ngokubanzi, akukho nyango lukhethekileyo lokomisa olufunekayo ngaphambi kokuba kuqhutywe i-PP injection.
Ukukhetha umatshini wokubumba ngenaliti
Akukho mfuneko ikhethekileyo yokukhetha oomatshini bokubumba ngenaliti. Kuba i-PP inekristali ephezulu. Umatshini wokubumba ngenaliti kwikhompyutha onoxinzelelo oluphezulu lokubumba ngenaliti kunye nolawulo olunezigaba ezininzi uyafuneka. Amandla okubamba ngokubanzi amiselwa yi-3800t/m2, kwaye umthamo wokubumba yi-20%-85%.
Uyilo lweMold kunye nesango
Ubushushu bokubumba buyi-50-90℃, kwaye ubushushu obuphezulu bokubumba busetyenziselwa iimfuno zobukhulu obuphezulu. Ubushushu obuphambili bungaphezulu kwe-5℃ kunobushushu bomngxuma, ububanzi bomdyarho buyi-4-7mm, ubude besango lenaliti buyi-1-1.5mm, kwaye ububanzi bunokuba buncinci njenge-0.7mm.
Ubude besango lomphetho bufutshane kangangoko, malunga ne-0.7mm, ubunzulu buyisiqingatha sobukhulu bodonga, kwaye ububanzi buphindwe kabini kunobukhulu bodonga, kwaye buyanda kancinci kancinci ngobude bokuhamba kokunyibilika emgodini.
Isikhunta kufuneka sibe nomoya ophuma kakuhle. Umngxuma womoya ubunzulu buyi-0.025mm-0.038mm kwaye ubukhulu buyi-1.5mm. Ukuze uphephe amabala okushwabana, sebenzisa imilomo emikhulu nengqukuva kunye neembambo ezijikelezayo, kwaye ubukhulu beembambo bufanele bube buncinci (Umzekelo, i-50-60% yobukhulu bodonga).
Ubukhulu beemveliso ezenziwe nge-homopolymer PP akufuneki budlule kwi-3mm, kungenjalo kuya kubakho amaqamza (iimveliso zodonga oluxineneyo zinokusebenzisa i-copolymer PP kuphela).
Ubushushu bokunyibilika
Iqondo lokunyibilika kwe-PP yi-160-175°C, kwaye ubushushu bokubola buyi-350°C, kodwa umlinganiselo wobushushu awunakudlula i-275°C ngexesha lokucubungula inaliti. Ubushushu kwicandelo lokunyibilika bungcono yi-240°C.
Isantya sokufaka inaliti
Ukuze kuncitshiswe uxinzelelo lwangaphakathi kunye nokuguquka, kufuneka kukhethwe inaliti ekhawulezayo, kodwa amanye amanqanaba e-PP kunye neenkuni azifanelekanga (amaqamza kunye nemigca yomoya kwimantle yomntu). Ukuba umphezulu oneepateni ubonakala unemigca ekhanyayo nemnyama esasazwa yisango, kufuneka kusetyenziswe inaliti ekhawulezayo kunye nobushushu obuphezulu benkuni.
Uxinzelelo oluncibilikayo lomqolo
Uxinzelelo lwangasemva lwe-glue ye-5bar melt lungasetyenziswa, kwaye uxinzelelo lwangasemva lwezinto ze-toner lunokulungiswa ngokufanelekileyo.
Inaliti kunye nokubamba uxinzelelo
Sebenzisa uxinzelelo oluphezulu lwe-injection (1500-1800bar) kunye noxinzelelo lokubamba (malunga ne-80% yoxinzelelo lwe-injection). Tshintshela kuxinzelelo lokubamba malunga ne-95% ye-stroke epheleleyo, kwaye sebenzisa ixesha elide lokubamba.
Emva kokucutshungulwa kweemveliso
Ukuze kuthintelwe ukushwabana kunye nokuguquguquka okubangelwa kukwenziwa kwekristali emva kokunyibilika, iimveliso ngokubanzi kufuneka zifakwe emanzini ashushu.
IShanghai Rainbow Industrial Co., Ltdngumenzi,Iphakheji yomnyama yaseShanghaiNika iphakheji enye yezithambiso. Ukuba uyayithanda imveliso yethu, ungayenzaQhagamshelana nathi,
Iwebhusayithi:www.rainbow-pkg.com
I-imeyile:Bobby@rainbow-pkg.com
I-WhatsApp: +008613818823743
Ixesha lokuthumela: Okthobha-04-2021