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1. Isalathiso sokunyibilika
Isalathisi sokunyibilika sidla ngokubonakaliswa ngokwe-MI kwaye ngoku saziwa kwihlabathi liphela njengesantya sokunyibilika, esichazwa njenge-MFR.
Isetyenziswa kakhulu njengepharamitha yokulawula umgangatho weeresini ze-thermoplastic kunye neemeko zenkqubo yokubumba i-thermoplastic. Lixabiso lobunzima bokunyibilika okuhamba nge-capillary eqhelekileyo kubushushu obuthile kunye nomthwalo oqhubekayo, odla ngokubonakaliswa kwi-g/10 imizuzu. Isalathisi sokunyibilika yipharamitha esetyenziselwa ukwahlula ukutyibilika kwezinto ezahlukeneyo ze-thermoplastic kwimeko yazo enyibilikisiweyo.
Kwi-resin efanayo, i-melt index ingasetyenziselwa ukuthelekisa ubunzima bayo be-molecular njengolawulo lomgangatho wemveliso.
Ngokubanzi, kwiiresini ezinesakhiwo esithile seekhemikhali, a. okukhona isalathisi sokunyibilika sincinci, kokukhona ubunzima beemolekyuli bukhulu, kokukhona amandla okuqhekeka, ubulukhuni, ukuqina, uzinzo lokwaluphala kunye nezinye iimpawu ziyaphucuka; b. ngelixa isalathisi sokunyibilika sikhulu, ubunzima beemolekyuli buncinci, kwaye amandla okuhamba kwamanzi angcono xa esenziwa.
Iiplastiki ezisetyenzisiweyongenxa yokungcola okungakumbi, indalo engazinzile, okubangela uxinzelelo oluphezulu, izinto ziya kuba neziphene ezininzi emva kokubumba, nto leyo echaphazela umgangatho wemveliso, indlela yokulawula imveliso yeminwe enyibilikisiweyo kwiimveliso ezilungileyo?
2. Ukunyibilika okwahlukileyo, kufuneka kwahlulwe
1) Amanqanaba e-resin ye-HDPE afumaneka kwi-injection molding, blow molding, rotational molding kunye ne-film, kwaye i-melt indices zazo ziyahluka.
a. I-HDPE evuthululweyo neyodidi lwefilimu iya kuba nomnwe omncinci onyibilikayo, ngokubanzi ungaphantsi kwe-2;
b. Umnwe onyibilikisiweyo wokubumba ngenaliti uya kuba mkhulu kune-2 kwaye ungafikelela kumashumi aliqela.
Oku kufuna ukuphinda kusetyenziswe izinto ezahlukeneyo, kwamkelwa iimfuno ezahlukeneyo zezinto ezicutshungulwayo.
3. Izinto ezixutywe kakuhle zeminwe enyibilikisiweyo
Okokuqala, ezo zibunjiweyo zingafakwa ngqo kwi-blow molding, ngelixa ezo zibunjiweyo zingenakusetyenziselwa ukubumba.
Eyona ndlela yokuguqula i-HDPE ene-melt index ephezulu ibe yi-HDPE ene-melt index ephantsi kukufumana indlela yokwandisa ubunzima be-molecular, nto leyo enzima ukuyenza ngokunyusa ubunzima be-molecular, equka i-polymer chemistry kwaye kunokuba nzima kakhulu ukuyisebenzisa.
Isisombululo esilula kuphela kukusebenzisa izinto ze-HDPE ezine-melt index ephantsi kuneefunekayo kwaye uzidibanise ngokwemilinganiselo ethile ne-HDPE ye-melt index ephezulu yangoku, i-melt index ebonakalayo iya kuba lixabiso eliphakathi lezinto ezimbini ezikrwada.
4. Izibopheleli zePolymer
Kukho isongezo esibizwa ngokuba yi-melt finger conditioner, esaziwa ngokuba yi-polymeric binder.
Luhlobo lohlengahlengiso lokucubungula iimveliso ze-polyolefin ezenzelwe indlela yokwenza isakhiwo esiqhelekileyo se-molecular seemveliso ze-polyolefin. Idibanisa ngempumelelo ii-polyolefin polymers ngeendlela ezahlukeneyo zokubopha, ngaloo ndlela inyusa umtsalane phakathi kwamacandelo e-polymer chain (oko kukuthi amandla e-van der Waals).
Le nkqubo yokuguqula ibuyisela iipropati zeemveliso ze-polyolefin ezonakaliswe kancinci kwiimpawu zazo zangaphambi kokuqhekeka, kunye nophuculo olukhulu kwiipropati zomntu ngamnye kuxhomekeke kubungakanani obongeziweyo.
Umsebenzi wayo kukutshintsha isiphumo sokufakelwa kunye nokoyisa iziphene zeempawu zoomatshini ze-compatibilizer yendabuko kunye nokungaguquguquki kakuhle. I-POE yi-elastomer emfutshane ye-thermoplastic ene-branched mass distribution efanayo eyenziwe yi-DOW Chemical Company e-USA isebenzisa i-metallocenes njengee-catalysts, kwaye iimpawu zayo eziphambili zibalaseleyo, ezifana namandla okutsalwa, amandla okukrazula kunye nezinye iimpawu eziphambili zoomatshini ziphuculwe xa kuthelekiswa nezinto zendabuko ze-elastic.
Isiqulatho
Eneminyaka ephantse ibe ngama-20 kwishishini lezixhobo zokukhupha izixhobo ezikrelekrele, ubambe iindima eziphambili kwiJwell Machinery, kuquka uMphathi Jikelele kunye noSihlalo ojikelezayo. Ukusukela ngo-2024, ulawule iinkampani ezininzi ezincedisayo, eqhuba ukwandiswa kweshishini kunye nokuphuculwa kwemizi-mveliso, ngelixa ekhokela ubuchule kwimveliso ekrelekrele kunye nokukhula kwehlabathi.
