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Ukuvuthela ngeplastiki
- Ukubumba umgobo wokuvuthela, inkqubo ekhawulezayo yokulungiswa kweplastiki. Ngexesha leMfazwe yeSibini yeHlabathi, isivuthelo sokubumba saqala ukusetyenziswa ukuvelisa iflaski yepolyethylene ephantsi. Ngasekupheleni kwe-50s, kunye nokuzalwa kwe-polyethylene yoxinaniso oluphezulu kunye nophuhliso lomatshini wokubumba, iteknoloji yokubumba ivuthela isetyenziswe ngokubanzi. .
- Iiplastiki zokubumba i-polyethylene, i-polyvinyl chloride, i-polypropylene, i-polyester njalo njalo. Izikhongozeli ezingenanto zisetyenziswa ngokubanzi njengezikhongozeli zokupakisha kwimizi-mveliso. Ukubumba ukuvuthela kunokohlulwa kukwenza ukuvuthela kwe-extrusion kunye nokubumba ukuvuthela ngesitofu, kwaye ukubumba okusanda kuphuhliswa komaleko ohlukeneyo kunye nokubumba ukuvuthela kwe-tensile kusanda kuphuhliswa.