Ukufutha ngeplastiki kunokwahlulwahlulwa kube ziinkqubo ezintathu: ukwenziwa kweenuclei zebhamuza, ukwandiswa kweenuclei zebhamuza, kunye nokuqina kwemizimba yebhamuza. Kwiiphepha zebhamuza zePVC, ukwandiswa kwesiseko sebhamuza kunempembelelo ebalulekileyo kumgangatho wephepha lebhamuza. I-PVC yeyeemolekyuli zetyathanga elithe tye, ezineetsheyini ezimfutshane zemolekyuli kunye namandla aphantsi okunyibilika. Ngexesha lenkqubo yokwandiswa kwebhamuza ibe ziibhamuza, ukunyibilika akwanelanga ukugubungela iibhamuza, kwaye igesi ithambekele ekuphuphumeni kwaye idibane ibe ziibhamuza ezinkulu, nto leyo enciphisa umgangatho wemveliso yeephepha zebhamuza.
Into ephambili ekuphuculeni umgangatho weeshiti ze-PVC foam kukunyusa amandla okunyibilika kwe-PVC. Ukusuka kuhlalutyo lweempawu zokucubungula izinto zepolymer, kukho iindlela ezahlukeneyo zokuphucula amandla okunyibilika kwe-PVC, phakathi kwazo eyona ndlela isebenzayo kukongeza izongezo ukuphucula amandla okunyibilika nokunciphisa ubushushu bokucubungula. I-PVC yeyezinto ezingabonakaliyo, kwaye amandla okunyibilika ayancipha ngokunyuka kobushushu bokunyibilika. Ngokwahlukileyo koko, amandla okunyibilika ayanda ngokuhla kobushushu bokunyibilika, kodwa isiphumo sokupholisa silinganiselwe kwaye sidlala indima yokuncedisa kuphela. Iiarhente zokucubungula i-ACR zinefuthe lokuphucula amandla okunyibilika, phakathi kwazo abalawuli be-foam zezona zisebenzayo kakhulu. Amandla okunyibilika ayanda ngokunyuka komxholo womlawuli we-foam. Ngokubanzi, lo gama nje isikrufu sinamandla okusasazeka ngokwaneleyo kunye nokukwazi ukuxuba, ukongeza abalawuli be-foam abane-viscosity ephezulu kunefuthe elibalulekileyo ekuphuculeni amandla okunyibilika. Indima yokucubungula inceda kwiishiti ze-foam ze-PVC: Izixhobo zokucubungula i-ACR zikhuthaza ukunyibilika kwe-PVC, ukuphucula ukuguda komphezulu, ukuphucula ukuthamba kokunyibilika, kunye nokuphucula ubude be-melt kunye namandla. Iluncedo ekusongeni amaqamza kunye nokuthintela ukuwa kwamaqamza. Ubunzima beemolekyuli kunye nomthamo wee-foam regulators zinempembelelo enkulu kuxinano lwee-foam sheets: njengoko ubunzima beemolekyuli bukhula, amandla okunyibilika kwe-PVC ayanda, kwaye uxinano lwee-foam sheets lunokuncipha, nto leyo enempembelelo efanayo nokwandisa umthamo wee-regulators. Kodwa esi siphumo asinalo ulwalamano oluthe ngqo. Ukuqhubeka nokunyusa ubunzima beemolekyuli okanye umthamo akunampembelelo ibalulekileyo ekunciphiseni uxinano, kwaye uxinano luya kuhlala luhleli.
Kukho ubudlelwane obubalulekileyo phakathi kwabalawuli be-foam kunye nee-agents ze-foam. Kukho indawo yokulingana phakathi koxinano lwamaphepha e-foam kunye nabalawuli be-foam. Ngaphaya kwale ndawo yokulingana, uxinano lwamaphepha e-foam aluchaphazeleki ngumxholo wee-agents ze-foam kwaye luhlala luhleli. Oko kukuthi, ukwandisa ubungakanani be-agent ye-foam akunakunciphisa uxinano. Isizathu sale nto kukuba phantsi komlinganiselo othile we-regulators ze-foam, amandla okunyibilika kwe-PVC anqongophele, kwaye igesi egqithisileyo inokubangela ukuwa okanye ukudibana kweeseli ze-foam.
Ixesha leposi: Matshi-28-2024
