Intshayelelo: Njengenye yeeplastiki ezisetyenziswa ngokubanzi ngokubanzi, iPP inokubonwa kuyo yonke indawo kubomi bemihla ngemihla. Inobunyulu obuphezulu kune-pc eqhelekileyo. Nangona ingenawo umbala ophezulu we-ABS, iPP inobunyulu obuphezulu kunye nonikezelo lombala. Kwishishini, izinto zePP zihlala zisetyenziswa kwizinto zokupakisha ezifanaiibhotile zeplastiki, iminqwazi yebhotile, iibhotile cream, njalo njalo. Ndilungiswa ngeI-RB PACKAGEkwaye kwabelwana ngayo nekhonkco lonikezelo ngereferensi:
Igama leKhemikhali: Polypropylene
Igama lesiNgesi: Polypropylene (ekubhekiswa kuyo njengePP)
I-PP yi-crystalline polymer. Phakathi kweeplastiki ezisetyenziswa ngokuqhelekileyo, i-PP iyona nto ilula, kunye nobuninzi be-0.91g / cm3 kuphela (ngaphantsi kwamanzi). Phakathi kweeplastiki zenjongo ngokubanzi, i-PP inokumelana nobushushu. Ubushushu balo bokuguqula ubushushu bungama-80-100 ° C kwaye bunokubiliswa emanzini abilayo. I-PP inokumelana noxinzelelo olulungileyo kunye nobomi bokudinwa okuphezulu. Ngokuqhelekileyo yaziwa njenge "100% yeplastiki". Ukusebenza okubanzi kwePP kungcono kunomathiriyeli wePE. Iimveliso zePP zinobunzima obulula, ukuqina okulungileyo kunye nokuchasana kweekhemikhali okulungileyo.
Ukungalungi kwePP: ukuchaneka komgangatho ophantsi, ukungonelanga kokuqina, ukuchasana kwemozulu embi, kulula ukuvelisa "umonakalo wobhedu", ine-post-shrinkage phenomenon, emva kokudiliza, kulula ukuguga, i-brittle, kwaye kulula ukuyiguqula.
01
Iimpawu zokubumba
I-1) I-crystalline material ine-hygroscopicity ephantsi kwaye iyakwazi ukunyibilika i-fracture, kwaye kulula ukubola ngokudibana kwexesha elide kunye nentsimbi eshushu.
I-2) I-fluidity ilungile, kodwa uluhlu lwe-shrinkage kunye nexabiso le-shrinkage likhulu, kwaye imingxuma eyanciphayo, i-dents, kunye ne-deformation kulula ukwenzeka.
3) Isantya sokupholisa sikhawuleza, inkqubo yokugalela kunye nenkqubo yokupholisa kufuneka ikhuphe ngokukhawuleza ubushushu, kwaye ubeke ingqalelo ekulawuleni ubushushu bokubumba. Ubushushu bezinto eziphathekayo kulula ukuqhelaniswa kwiqondo lokushisa eliphantsi kunye noxinzelelo oluphezulu. Xa iqondo lobushushu lokungunda lingaphantsi kwama-50 degrees, inxalenye yeplastiki ayigudi, kwaye kulula ukuvelisa i-welding engalunganga, amanqaku okuhamba, i-Prone to warping and deformation ngaphezu kwama-90 degrees.
I-4) Ubunzima bodonga lweplastiki kufuneka bufanane ukuze ugweme ukungabikho kweglue kunye neekona ezibukhali ukukhusela uxinzelelo loxinzelelo.
02
Iimpawu zenkqubo
I-PP ine-fluidity elungileyo kubushushu obunyibilikayo kunye nokusebenza kakuhle kokubumba. I-PP ineempawu ezimbini ekuqhubeni
Enye: I-viscosity ye-PP inyibilika iyancipha kakhulu ngokunyuka kwereyithi yokucheba (engaphantsi kwefuthe lobushushu)
Okwesibini: Iqondo le-molecular orientation liphezulu kwaye izinga lokucutheka liphezulu.
Ubushushu bokusebenza kwePP bujikeleze i-200-300 ℃. Inozinzo oluhle lwe-thermal (iqondo lobushushu lokubola liyi-310℃), kodwa kubushushu obuphezulu (270-300℃), linokuthomalalisa ukuba lihlala ixesha elide emgqomeni. Ngenxa yokuba i-viscosity ye-PP iyancipha kakhulu ngokunyuka kwesantya sokucheba, ukonyuka koxinzelelo lwenaliti kunye nesantya senaliti kuya konyusa ulwelo kunye nokuphucula ukonakala kunye nokudakumba. Ubushushu bomngundo kufuneka bulawuleke phakathi koluhlu lwe-30-50℃. I-PP iyanyibilika inokudlula kwisithuba sokungunda esimxinwa kakhulu kwaye sivele ngaphambili. Kwinkqubo yokunyibilika kwePP, kufuneka ithathe ubushushu obukhulu be-fusion (ubushushu obukhethekileyo obukhulu), kwaye umkhiqizo ushushu emva kokukhutshwa kwi-mold. Izinto zePP azidingeki zomiswe ngexesha lokucubungula, kwaye izinga le-shrinkage kunye ne-crystallinity ye-PP iphantsi kune-PE.
03
Amanqaku kufuneka aqatshelwe kwiprosesa yeplastiki
Ukulungiswa kweplastiki
I-PP ecocekileyo i-translucent yendlovu emhlophe kwaye inokudaywa ngemibala eyahlukeneyo. I-PP inokudaywa kuphela ngombala we-masterbatch kumatshini wokubumba inaliti jikelele, kodwa ezinye iimodeli zinezinto ezizimeleyo zeplastiki ezomeleza umphumo wokuxuba, kwaye zinokudaywa ngetoner.
Iimveliso ezisetyenziswa ngaphandle zizaliswe zizinzisi ze-UV kunye nekhabhoni emnyama. Umlinganiselo wokusetyenziswa kwezinto ezisetyenzisiweyo akufanele udlule i-15%, ngaphandle koko kuya kubangela ukuhla kwamandla kunye nokubola kunye nokuguqulwa kombala. Ngokubanzi, akukho nyango lukhethekileyo lokumisa olufunekayo phambi kokusetyenzwa kwenaliti yePP.
Ukukhetha umatshini wokubumba isitofu
Akukho mfuneko zikhethekileyo zokukhethwa koomatshini bokubumba inaliti. Kuba iPP inobukhazikhazi obuphezulu. Umatshini wokubumba inaliti yekhompyuter enoxinzelelo oluphezulu lwenaliti kunye nolawulo lwamanqanaba amaninzi luyafuneka. Amandla okubamba ngokuqhelekileyo anqunywe ngu-3800t / m2, kwaye umthamo we-injection yi-20% -85%.
Uyilo lokungunda kunye nesango
Iqondo lobushushu lokungunda yi 50-90℃, kwaye ubushushu obuphezulu bokungunda busetyenziselwa iimfuno zobukhulu obuphezulu. Ubushushu obuphambili bungaphezulu kwe-5℃ ngaphantsi kobushushu bomgodi, i-diameter yembaleki yi-4-7mm, ubude besango lenaliti yi-1-1.5mm, kwaye ububanzi bunokuba buncinci njenge-0.7mm.
Ubude besango lomphetho bufutshane ngokusemandleni, malunga ne-0.7mm, ubunzulu buyisiqingatha sobunzima bodonga, kwaye ububanzi buphindwe kabini ubukhulu bodonga, kwaye bukhula ngokuthe ngcembe kunye nobude be-melt flow in the cavity.
Umngundo kufuneka ube nomoya olungileyo. Umngxuma wokukhupha umoya yi-0.025mm-0.038mm ubunzulu kunye ne-1.5mm ubukhulu. Ukuze ugweme iimpawu zokunciphisa, sebenzisa imibhobho emikhulu kunye neengqungquthela kunye nabagijimi beetyhula, kwaye ubukhulu beembambo kufuneka bube buncinci (Umzekelo, i-50-60% yodonga lwamadonga).
Ubuninzi beemveliso ezenziwe nge-homopolymer PP akufanele zidlule i-3mm, ngaphandle koko kuya kubakho amaqamza (imveliso yodonga olungqingqwa inokusebenzisa i-copolymer PP kuphela).
Ubushushu obunyibilikayo
Iqondo elinyibilikayo le-PP liyi-160-175 ° C, kwaye ukushisa kwe-decomposition yi-350 ° C, kodwa ukusetwa kweqondo lokushisa akukwazi ukudlula i-275 ° C ngexesha lokucubungula i-injection. Iqondo lobushushu kwicandelo lokunyibilika likhethwa ukuba libe ngama-240°C.
Isantya sokutofa
Ukuze kuncitshiswe uxinzelelo lwangaphakathi kunye ne-deformation, i-injection yesantya esiphezulu kufuneka ikhethwe, kodwa amanye amabakala e-PP kunye ne-molds ayifanelekanga (iibhubhu kunye nemigca yomoya kwi-mantle yomntu). Ukuba umgangatho owenziweyo ubonakala unemigca ekhanyayo kunye nemnyama esasazwe ngesango, inaliti enesantya esisezantsi kunye nobushushu obuphezulu bokubumba kufuneka busetyenziswe.
Inyibilike uxinzelelo lwasemva
I-5bar melt adhesive back pressure ingasetyenziswa, kwaye uxinzelelo lwangemva lwento yetoner lunokulungelelaniswa ngokufanelekileyo.
Isitofu kunye nokubamba uxinzelelo
Sebenzisa uxinzelelo lwenaliti ephezulu (1500-1800bar) kunye nokubamba uxinzelelo (malunga ne-80% yoxinzelelo lwenaliti). Tshintshela ekubambeni uxinzelelo malunga ne-95% ye-stroke epheleleyo, kwaye usebenzise ixesha elide lokubamba.
Emva kokulungiswa kweemveliso
Ukuze kuthintelwe ukuncipha kunye nokuguqulwa okubangelwa yi-post-crystallization, iimveliso ngokubanzi kufuneka zifakwe emanzini ashushu.
IShanghai Rainbow Industrial Co., Ltdngumenzi,Shanghai rainbow iphakhejiNikeza ukupakishwa kwezithambiso zokumisa okukodwa.Ukuba uthanda iimveliso zethu, unakoQhagamshelana nathi,
Iwebhusayithi:www.rainbow-pkg.com
I-imeyile:Bobby@rainbow-pkg.com
WhatsApp: +008613818823743
Ixesha lokuposa: Oct-04-2021